static void mg_ssl_mbed_log(void *ctx, int level, const char *file, int line,
const char *str) {
enum cs_log_level cs_level;
switch (level) {
case 1:
cs_level = LL_ERROR;
break;
case 2:
cs_level = LL_INFO;
break;
case 3:
cs_level = LL_DEBUG;
break;
default:
cs_level = LL_VERBOSE_DEBUG;
}
/* mbedTLS passes strings with \n at the end, strip it. */
LOG(cs_level, ("%p %.*s", (void*)ctx, (int) (strlen(str) - 1), str));
(void) ctx;
(void) str;
(void) file;
(void) line;
(void) cs_level;
}
struct mg_ssl_if_ctx {
mbedtls_ssl_config *conf;
mbedtls_ssl_context *ssl;
mbedtls_x509_crt *cert;
mbedtls_pk_context *key;
#ifdef MBEDTLS_X509_CA_CHAIN_ON_DISK
char *ca_chain_file;
#else
mbedtls_x509_crt *ca_cert;
#endif
struct mbuf cipher_suites;
size_t saved_len;
};
/* Must be provided by the platform. ctx is struct mg_connection. */
extern int mg_ssl_if_mbed_random(void *ctx, unsigned char *buf, size_t len);
void mg_ssl_if_init(void) {
LOG(LL_INFO, ("%s", MBEDTLS_VERSION_STRING_FULL));
}
enum mg_ssl_if_result mg_ssl_if_conn_accept(struct mg_connection *nc,
struct mg_connection *lc) {
struct mg_ssl_if_ctx *ctx =
(struct mg_ssl_if_ctx *) MG_CALLOC(1, sizeof(*ctx));
struct mg_ssl_if_ctx *lc_ctx = (struct mg_ssl_if_ctx *) lc->ssl_if_data;
nc->ssl_if_data = ctx;
if (ctx == NULL || lc_ctx == NULL) return MG_SSL_ERROR;
ctx->ssl = (mbedtls_ssl_context *) MG_CALLOC(1, sizeof(*ctx->ssl));
if (mbedtls_ssl_setup(ctx->ssl, lc_ctx->conf) != 0) {
return MG_SSL_ERROR;
}
return MG_SSL_OK;
}
static enum mg_ssl_if_result mg_use_cert(struct mg_ssl_if_ctx *ctx,
const char *cert, const char *key,
const char **err_msg);
static enum mg_ssl_if_result mg_use_ca_cert(struct mg_ssl_if_ctx *ctx,
const char *cert);
static enum mg_ssl_if_result mg_set_cipher_list(struct mg_ssl_if_ctx *ctx,
const char *ciphers);
#ifdef MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED
static enum mg_ssl_if_result mg_ssl_if_mbed_set_psk(struct mg_ssl_if_ctx *ctx,
const char *identity,
const char *key);
#endif
enum mg_ssl_if_result mg_ssl_if_conn_init(
struct mg_connection *nc, const struct mg_ssl_if_conn_params *params,
const char **err_msg) {
struct mg_ssl_if_ctx *ctx =
(struct mg_ssl_if_ctx *) MG_CALLOC(1, sizeof(*ctx));
DBG(("%p %s,%s,%s", (void*)nc, (params->cert ? params->cert : ""),
(params->key ? params->key : ""),
(params->ca_cert ? params->ca_cert : "")));
if (ctx == NULL) {
MG_SET_PTRPTR(err_msg, "Out of memory");
return MG_SSL_ERROR;
}
nc->ssl_if_data = ctx;
ctx->conf = (mbedtls_ssl_config *) MG_CALLOC(1, sizeof(*ctx->conf));
mbuf_init(&ctx->cipher_suites, 0);
mbedtls_ssl_config_init(ctx->conf);
mbedtls_ssl_conf_dbg(ctx->conf, mg_ssl_mbed_log, nc);
if (mbedtls_ssl_config_defaults(
ctx->conf, (nc->flags & MG_F_LISTENING ? MBEDTLS_SSL_IS_SERVER
: MBEDTLS_SSL_IS_CLIENT),
MBEDTLS_SSL_TRANSPORT_STREAM, MBEDTLS_SSL_PRESET_DEFAULT) != 0) {
MG_SET_PTRPTR(err_msg, "Failed to init SSL config");
return MG_SSL_ERROR;
}
/* TLS 1.2 and up */
mbedtls_ssl_conf_min_version(ctx->conf, MBEDTLS_SSL_MAJOR_VERSION_3,
MBEDTLS_SSL_MINOR_VERSION_3);
mbedtls_ssl_conf_rng(ctx->conf, mg_ssl_if_mbed_random, nc);
if (params->cert != NULL &&
mg_use_cert(ctx, params->cert, params->key, err_msg) != MG_SSL_OK) {
return MG_SSL_ERROR;
}
if (params->ca_cert != NULL &&
mg_use_ca_cert(ctx, params->ca_cert) != MG_SSL_OK) {
MG_SET_PTRPTR(err_msg, "Invalid SSL CA cert");
return MG_SSL_ERROR;
}
if (mg_set_cipher_list(ctx, params->cipher_suites) != MG_SSL_OK) {
MG_SET_PTRPTR(err_msg, "Invalid cipher suite list");
return MG_SSL_ERROR;
}
#ifdef MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED
if (mg_ssl_if_mbed_set_psk(ctx, params->psk_identity, params->psk_key) !=
MG_SSL_OK) {
MG_SET_PTRPTR(err_msg, "Invalid PSK settings");
return MG_SSL_ERROR;
}
#endif
if (!(nc->flags & MG_F_LISTENING)) {
ctx->ssl = (mbedtls_ssl_context *) MG_CALLOC(1, sizeof(*ctx->ssl));
mbedtls_ssl_init(ctx->ssl);
if (mbedtls_ssl_setup(ctx->ssl, ctx->conf) != 0) {
MG_SET_PTRPTR(err_msg, "Failed to create SSL session");
return MG_SSL_ERROR;
}
if (params->server_name != NULL &&
mbedtls_ssl_set_hostname(ctx->ssl, params->server_name) != 0) {
return MG_SSL_ERROR;
}
}
#ifdef MG_SSL_IF_MBEDTLS_MAX_FRAG_LEN
if (mbedtls_ssl_conf_max_frag_len(ctx->conf,
#if MG_SSL_IF_MBEDTLS_MAX_FRAG_LEN == 512
MBEDTLS_SSL_MAX_FRAG_LEN_512
#elif MG_SSL_IF_MBEDTLS_MAX_FRAG_LEN == 1024
MBEDTLS_SSL_MAX_FRAG_LEN_1024
#elif MG_SSL_IF_MBEDTLS_MAX_FRAG_LEN == 2048
MBEDTLS_SSL_MAX_FRAG_LEN_2048
#elif MG_SSL_IF_MBEDTLS_MAX_FRAG_LEN == 4096
MBEDTLS_SSL_MAX_FRAG_LEN_4096
#else
#error Invalid MG_SSL_IF_MBEDTLS_MAX_FRAG_LEN
#endif
) != 0) {
return MG_SSL_ERROR;
}
#endif
nc->flags |= MG_F_SSL;
return MG_SSL_OK;
}
static int mg_ssl_if_mbed_send(void *ctx, const unsigned char *buf,
size_t len) {
struct mg_connection *nc = (struct mg_connection *) ctx;
int n = nc->iface->vtable->tcp_send(nc, buf, len);
if (n > 0) return n;
if (n == 0) return MBEDTLS_ERR_SSL_WANT_WRITE;
return MBEDTLS_ERR_NET_SEND_FAILED;
}
static int mg_ssl_if_mbed_recv(void *ctx, unsigned char *buf, size_t len) {
struct mg_connection *nc = (struct mg_connection *) ctx;
int n = nc->iface->vtable->tcp_recv(nc, buf, len);
if (n > 0) return n;
if (n == 0) return MBEDTLS_ERR_SSL_WANT_READ;
return MBEDTLS_ERR_NET_RECV_FAILED;
}
static enum mg_ssl_if_result mg_ssl_if_mbed_err(struct mg_connection *nc,
int ret) {
enum mg_ssl_if_result res = MG_SSL_OK;
if (ret == MBEDTLS_ERR_SSL_WANT_READ) {
res = MG_SSL_WANT_READ;
} else if (ret == MBEDTLS_ERR_SSL_WANT_WRITE) {
res = MG_SSL_WANT_WRITE;
} else if (ret == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY) {
LOG(LL_DEBUG, ("%p TLS connection closed by peer", (void*)nc));
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
res = MG_SSL_OK;
} else {
LOG(LL_ERROR, ("%p mbedTLS error: -0x%04x", (void*)nc, -ret));
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
res = MG_SSL_ERROR;
}
nc->err = ret;
return res;
}
static void mg_ssl_if_mbed_free_certs_and_keys(struct mg_ssl_if_ctx *ctx) {
if (ctx->cert != NULL) {
mbedtls_x509_crt_free(ctx->cert);
MG_FREE(ctx->cert);
ctx->cert = NULL;
mbedtls_pk_free(ctx->key);
MG_FREE(ctx->key);
ctx->key = NULL;
}
#ifdef MBEDTLS_X509_CA_CHAIN_ON_DISK
MG_FREE(ctx->ca_chain_file);
ctx->ca_chain_file = NULL;
#else
if (ctx->ca_cert != NULL) {
mbedtls_ssl_conf_ca_chain(ctx->conf, NULL, NULL);
mbedtls_x509_crt_free(ctx->ca_cert);
MG_FREE(ctx->ca_cert);
ctx->ca_cert = NULL;
}
#endif
}
enum mg_ssl_if_result mg_ssl_if_handshake(struct mg_connection *nc) {
struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data;
int err;
/* If bio is not yet set, do it now. */
if (ctx->ssl->p_bio == NULL) {
mbedtls_ssl_set_bio(ctx->ssl, nc, mg_ssl_if_mbed_send, mg_ssl_if_mbed_recv,
NULL);
}
err = mbedtls_ssl_handshake(ctx->ssl);
if (err != 0) return mg_ssl_if_mbed_err(nc, err);
#ifdef MG_SSL_IF_MBEDTLS_FREE_CERTS
/*
* Free the peer certificate, we don't need it after handshake.
* Note that this effectively disables renegotiation.
*/
mbedtls_x509_crt_free(ctx->ssl->session->peer_cert);
mbedtls_free(ctx->ssl->session->peer_cert);
ctx->ssl->session->peer_cert = NULL;
/* On a client connection we can also free our own and CA certs. */
if (nc->listener == NULL) {
if (ctx->conf->key_cert != NULL) {
/* Note that this assumes one key_cert entry, which matches our init. */
MG_FREE(ctx->conf->key_cert);
ctx->conf->key_cert = NULL;
}
mbedtls_ssl_conf_ca_chain(ctx->conf, NULL, NULL);
mg_ssl_if_mbed_free_certs_and_keys(ctx);
}
#endif
return MG_SSL_OK;
}
int mg_ssl_if_read(struct mg_connection *nc, void *buf, size_t len) {
struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data;
int n = mbedtls_ssl_read(ctx->ssl, (unsigned char *) buf, len);
DBG(("%p %d -> %d", (void*)nc, (int) len, n));
if (n < 0) return mg_ssl_if_mbed_err(nc, n);
if (n == 0) nc->flags |= MG_F_CLOSE_IMMEDIATELY;
return n;
}
int mg_ssl_if_write(struct mg_connection *nc, const void *buf, size_t len) {
struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data;
/* Per mbedTLS docs, if write returns WANT_READ or WANT_WRITE, the operation
* should be retried with the same data and length.
* Here we assume that the data being pushed will remain the same but the
* amount may grow between calls so we save the length that was used and
* retry. The assumption being that the data itself won't change and won't
* be removed. */
size_t l = len;
if (ctx->saved_len > 0 && ctx->saved_len < l) l = ctx->saved_len;
int n = mbedtls_ssl_write(ctx->ssl, (const unsigned char *) buf, l);
DBG(("%p %d,%d,%d -> %d", (void*)nc, (int) len, (int) ctx->saved_len, (int) l, n));
if (n < 0) {
if (n == MBEDTLS_ERR_SSL_WANT_READ || n == MBEDTLS_ERR_SSL_WANT_WRITE) {
ctx->saved_len = len;
}
return mg_ssl_if_mbed_err(nc, n);
} else if (n > 0) {
ctx->saved_len = 0;
}
return n;
}
void mg_ssl_if_conn_close_notify(struct mg_connection *nc) {
struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data;
if (ctx == NULL) return;
mbedtls_ssl_close_notify(ctx->ssl);
}
void mg_ssl_if_conn_free(struct mg_connection *nc) {
struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data;
if (ctx == NULL) return;
nc->ssl_if_data = NULL;
if (ctx->ssl != NULL) {
mbedtls_ssl_free(ctx->ssl);
MG_FREE(ctx->ssl);
}
if (ctx->conf != NULL) {
mbedtls_ssl_config_free(ctx->conf);
MG_FREE(ctx->conf);
}
mg_ssl_if_mbed_free_certs_and_keys(ctx);
mbuf_free(&ctx->cipher_suites);
memset(ctx, 0, sizeof(*ctx));
MG_FREE(ctx);
}
static enum mg_ssl_if_result mg_use_ca_cert(struct mg_ssl_if_ctx *ctx,
const char *ca_cert) {
if (ca_cert == NULL || strcmp(ca_cert, "*") == 0) {
mbedtls_ssl_conf_authmode(ctx->conf, MBEDTLS_SSL_VERIFY_NONE);
return MG_SSL_OK;
}
#ifdef MBEDTLS_X509_CA_CHAIN_ON_DISK
ctx->ca_chain_file = strdup(ca_cert);
if (ctx->ca_chain_file == NULL) return MG_SSL_ERROR;
if (mbedtls_ssl_conf_ca_chain_file(ctx->conf, ctx->ca_chain_file, NULL) != 0) {
return MG_SSL_ERROR;
}
#else
ctx->ca_cert = (mbedtls_x509_crt *) MG_CALLOC(1, sizeof(*ctx->ca_cert));
mbedtls_x509_crt_init(ctx->ca_cert);
if (mbedtls_x509_crt_parse_file(ctx->ca_cert, ca_cert) != 0) {
return MG_SSL_ERROR;
}
mbedtls_ssl_conf_ca_chain(ctx->conf, ctx->ca_cert, NULL);
#endif
mbedtls_ssl_conf_authmode(ctx->conf, MBEDTLS_SSL_VERIFY_REQUIRED);
return MG_SSL_OK;
}
static enum mg_ssl_if_result mg_use_cert(struct mg_ssl_if_ctx *ctx,
const char *cert, const char *key,
const char **err_msg) {
if (key == NULL) key = cert;
if (cert == NULL || cert[0] == '\0' || key == NULL || key[0] == '\0') {
return MG_SSL_OK;
}
ctx->cert = (mbedtls_x509_crt *) MG_CALLOC(1, sizeof(*ctx->cert));
mbedtls_x509_crt_init(ctx->cert);
ctx->key = (mbedtls_pk_context *) MG_CALLOC(1, sizeof(*ctx->key));
mbedtls_pk_init(ctx->key);
if (mbedtls_x509_crt_parse_file(ctx->cert, cert) != 0) {
MG_SET_PTRPTR(err_msg, "Invalid SSL cert");
return MG_SSL_ERROR;
}
if (mbedtls_pk_parse_keyfile(ctx->key, key, NULL) != 0) {
MG_SET_PTRPTR(err_msg, "Invalid SSL key");
return MG_SSL_ERROR;
}
if (mbedtls_ssl_conf_own_cert(ctx->conf, ctx->cert, ctx->key) != 0) {
MG_SET_PTRPTR(err_msg, "Invalid SSL key or cert");
return MG_SSL_ERROR;
}
return MG_SSL_OK;
}
static const int mg_s_cipher_list[] = {
#if CS_PLATFORM != CS_P_ESP8266
MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
MBEDTLS_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256,
MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,
MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256,
MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256,
MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA,
MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256,
MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256,
MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA,
MBEDTLS_TLS_RSA_WITH_AES_128_GCM_SHA256,
MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA256,
MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA,
#else
/*
* ECDHE is way too slow on ESP8266 w/o cryptochip, this sometimes results
* in WiFi STA deauths. Use weaker but faster cipher suites. Sad but true.
* Disable DHE completely because it's just hopelessly slow.
*/
MBEDTLS_TLS_RSA_WITH_AES_128_GCM_SHA256,
MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA256,
MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256,
MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256,
MBEDTLS_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA,
MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256,
MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256,
MBEDTLS_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA,
MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA,
#endif /* CS_PLATFORM != CS_P_ESP8266 */
0,
};
/*
* Ciphers can be specified as a colon-separated list of cipher suite names.
* These can be found in
* https://github.com/ARMmbed/mbedtls/blob/development/library/ssl_ciphersuites.c#L267
* E.g.: TLS-ECDHE-ECDSA-WITH-AES-128-GCM-SHA256:TLS-DHE-RSA-WITH-AES-256-CCM
*/
static enum mg_ssl_if_result mg_set_cipher_list(struct mg_ssl_if_ctx *ctx,
const char *ciphers) {
if (ciphers != NULL) {
int l, id;
const char *s = ciphers, *e;
char tmp[50];
while (s != NULL) {
e = strchr(s, ':');
l = (e != NULL ? (e - s) : (int) strlen(s));
strncpy(tmp, s, l);
tmp[l] = '\0';
id = mbedtls_ssl_get_ciphersuite_id(tmp);
DBG(("%s -> %04x", tmp, id));
if (id != 0) {
mbuf_append(&ctx->cipher_suites, &id, sizeof(id));
}
s = (e != NULL ? e + 1 : NULL);
}
if (ctx->cipher_suites.len == 0) return MG_SSL_ERROR;
id = 0;
mbuf_append(&ctx->cipher_suites, &id, sizeof(id));
mbuf_trim(&ctx->cipher_suites);
mbedtls_ssl_conf_ciphersuites(ctx->conf,
(const int *) ctx->cipher_suites.buf);
} else {
mbedtls_ssl_conf_ciphersuites(ctx->conf, mg_s_cipher_list);
}
return MG_SSL_OK;
}
#ifdef MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED
static enum mg_ssl_if_result mg_ssl_if_mbed_set_psk(struct mg_ssl_if_ctx *ctx,
const char *identity,
const char *key_str) {
unsigned char key[32];
size_t key_len;
if (identity == NULL && key_str == NULL) return MG_SSL_OK;
if (identity == NULL || key_str == NULL) return MG_SSL_ERROR;
key_len = strlen(key_str);
if (key_len != 32 && key_len != 64) return MG_SSL_ERROR;
size_t i = 0;
memset(key, 0, sizeof(key));
key_len = 0;
for (i = 0; key_str[i] != '\0'; i++) {
unsigned char c;
char hc = tolower((int) key_str[i]);
if (hc >= '0' && hc <= '9') {
c = hc - '0';
} else if (hc >= 'a' && hc <= 'f') {
c = hc - 'a' + 0xa;
} else {
return MG_SSL_ERROR;
}
key_len = i / 2;
key[key_len] <<= 4;
key[key_len] |= c;
}
key_len++;
DBG(("identity = '%s', key = (%u)", identity, (unsigned int) key_len));
/* mbedTLS makes copies of psk and identity. */
if (mbedtls_ssl_conf_psk(ctx->conf, (const unsigned char *) key, key_len,
(const unsigned char *) identity,
strlen(identity)) != 0) {
return MG_SSL_ERROR;
}
return MG_SSL_OK;
}
#endif
const char *mg_set_ssl(struct mg_connection *nc, const char *cert,
const char *ca_cert) {
const char *err_msg = NULL;
struct mg_ssl_if_conn_params params;
memset(¶ms, 0, sizeof(params));
params.cert = cert;
params.ca_cert = ca_cert;
if (mg_ssl_if_conn_init(nc, ¶ms, &err_msg) != MG_SSL_OK) {
return err_msg;
}
return NULL;
}
/* Lazy RNG. Warning: it would be a bad idea to do this in production! */
#ifdef MG_SSL_MBED_DUMMY_RANDOM
int mg_ssl_if_mbed_random(void *ctx, unsigned char *buf, size_t len) {
(void) ctx;
while (len--) *buf++ = rand();
return 0;
}
#endif
#endif /* MG_ENABLE_SSL && MG_SSL_IF == MG_SSL_IF_MBEDTLS */
#ifdef MG_MODULE_LINES
#line 1 "src/mg_uri.c"
#endif
/* Amalgamated: #include "mg_internal.h" */
/* Amalgamated: #include "mg_uri.h" */
/*
* scan string until encountering one of `seps`, keeping track of component
* boundaries in `res`.
*
* `p` will point to the char after the separator or it will be `end`.
*/
static void parse_uri_component(const char **p, const char *end,
const char *seps, struct mg_str *res) {
const char *q;
res->p = *p;
for (; *p < end; (*p)++) {
for (q = seps; *q != '\0'; q++) {
if (**p == *q) break;
}
if (*q != '\0') break;
}
res->len = (*p) - res->p;
if (*p < end) (*p)++;
}
int mg_parse_uri(const struct mg_str uri, struct mg_str *scheme,
struct mg_str *user_info, struct mg_str *host,
unsigned int *port, struct mg_str *path, struct mg_str *query,
struct mg_str *fragment) {
struct mg_str rscheme = {0, 0}, ruser_info = {0, 0}, rhost = {0, 0},
rpath = {0, 0}, rquery = {0, 0}, rfragment = {0, 0};
unsigned int rport = 0;
enum {
P_START,
P_SCHEME_OR_PORT,
P_USER_INFO,
P_HOST,
P_PORT,
P_REST
} state = P_START;
const char *p = uri.p, *end = p + uri.len;
while (p < end) {
switch (state) {
case P_START:
/*
* expecting on of:
* - `scheme://xxxx`
* - `xxxx:port`
* - `[a:b:c]:port`
* - `xxxx/path`
*/
if (*p == '[') {
state = P_HOST;
break;
}
for (; p < end; p++) {
if (*p == ':') {
state = P_SCHEME_OR_PORT;
break;
} else if (*p == '/') {
state = P_REST;
break;
}
}
if (state == P_START || state == P_REST) {
rhost.p = uri.p;
rhost.len = p - uri.p;
}
break;
case P_SCHEME_OR_PORT:
if (end - p >= 3 && strncmp(p, "://", 3) == 0) {
rscheme.p = uri.p;
rscheme.len = p - uri.p;
state = P_USER_INFO;
p += 3;
} else {
rhost.p = uri.p;
rhost.len = p - uri.p;
state = P_PORT;
}
break;
case P_USER_INFO:
ruser_info.p = p;
for (; p < end; p++) {
if (*p == '@' || *p == '[' || *p == '/') {
break;
}
}
if (p == end || *p == '/' || *p == '[') {
/* backtrack and parse as host */
p = ruser_info.p;
}
ruser_info.len = p - ruser_info.p;
state = P_HOST;
break;
case P_HOST:
if (*p == '@') p++;
rhost.p = p;
if (*p == '[') {
int found = 0;
for (; !found && p < end; p++) {
found = (*p == ']');
}
if (!found) return -1;
} else {
for (; p < end; p++) {
if (*p == ':' || *p == '/') break;
}
}
rhost.len = p - rhost.p;
if (p < end) {
if (*p == ':') {
state = P_PORT;
break;
} else if (*p == '/') {
state = P_REST;
break;
}
}
break;
case P_PORT:
p++;
for (; p < end; p++) {
if (*p == '/') {
state = P_REST;
break;
}
rport *= 10;
rport += *p - '0';
}
break;
case P_REST:
/* `p` points to separator. `path` includes the separator */
parse_uri_component(&p, end, "?#", &rpath);
if (p < end && *(p - 1) == '?') {
parse_uri_component(&p, end, "#", &rquery);
}
parse_uri_component(&p, end, "", &rfragment);
break;
}
}
if (scheme != 0) *scheme = rscheme;
if (user_info != 0) *user_info = ruser_info;
if (host != 0) *host = rhost;
if (port != 0) *port = rport;
if (path != 0) *path = rpath;
if (query != 0) *query = rquery;
if (fragment != 0) *fragment = rfragment;
return 0;
}
/* Normalize the URI path. Remove/resolve "." and "..". */
int mg_normalize_uri_path(const struct mg_str *in, struct mg_str *out) {
const char *s = in->p, *se = s + in->len;
char *cp = (char *) out->p, *d;
if (in->len == 0 || *s != '/') {
out->len = 0;
return 0;
}
d = cp;
while (s < se) {
const char *next = s;
struct mg_str component;
parse_uri_component(&next, se, "/", &component);
if (mg_vcmp(&component, ".") == 0) {
/* Yum. */
} else if (mg_vcmp(&component, "..") == 0) {
/* Backtrack to previous slash. */
if (d > cp + 1 && *(d - 1) == '/') d--;
while (d > cp && *(d - 1) != '/') d--;
} else {
memmove(d, s, next - s);
d += next - s;
}
s = next;
}
if (d == cp) *d++ = '/';
out->p = cp;
out->len = d - cp;
return 1;
}
int mg_assemble_uri(const struct mg_str *scheme, const struct mg_str *user_info,
const struct mg_str *host, unsigned int port,
const struct mg_str *path, const struct mg_str *query,
const struct mg_str *fragment, int normalize_path,
struct mg_str *uri) {
int result = -1;
struct mbuf out;
mbuf_init(&out, 0);
if (scheme != NULL && scheme->len > 0) {
mbuf_append(&out, scheme->p, scheme->len);
mbuf_append(&out, "://", 3);
}
if (user_info != NULL && user_info->len > 0) {
mbuf_append(&out, user_info->p, user_info->len);
mbuf_append(&out, "@", 1);
}
if (host != NULL && host->len > 0) {
mbuf_append(&out, host->p, host->len);
}
if (port != 0) {
char port_str[20];
int port_str_len = sprintf(port_str, ":%u", port);
mbuf_append(&out, port_str, port_str_len);
}
if (path != NULL && path->len > 0) {
if (normalize_path) {
struct mg_str npath = mg_strdup(*path);
if (npath.len != path->len) goto out;
if (!mg_normalize_uri_path(path, &npath)) {
free((void *) npath.p);
goto out;
}
mbuf_append(&out, npath.p, npath.len);
free((void *) npath.p);
} else {
mbuf_append(&out, path->p, path->len);
}
} else if (normalize_path) {
mbuf_append(&out, "/", 1);
}
if (query != NULL && query->len > 0) {
mbuf_append(&out, "?", 1);
mbuf_append(&out, query->p, query->len);
}
if (fragment != NULL && fragment->len > 0) {
mbuf_append(&out, "#", 1);
mbuf_append(&out, fragment->p, fragment->len);
}
result = 0;
out:
if (result == 0) {
uri->p = out.buf;
uri->len = out.len;
} else {
mbuf_free(&out);
uri->p = NULL;
uri->len = 0;
}
return result;
}
#ifdef MG_MODULE_LINES
#line 1 "src/mg_http.c"
#endif
#if MG_ENABLE_HTTP
/* Amalgamated: #include "common/cs_md5.h" */
/* Amalgamated: #include "mg_internal.h" */
/* Amalgamated: #include "mg_util.h" */
/* altbuf {{{ */
/*
* Alternate buffer: fills the client-provided buffer with data; and if it's
* not large enough, allocates another buffer (via mbuf), similar to asprintf.
*/
struct altbuf {
struct mbuf m;
char *user_buf;
size_t len;
size_t user_buf_size;
};
/*
* Initializes altbuf; `buf`, `buf_size` is the client-provided buffer.
*/
MG_INTERNAL void altbuf_init(struct altbuf *ab, char *buf, size_t buf_size) {
mbuf_init(&ab->m, 0);
ab->user_buf = buf;
ab->user_buf_size = buf_size;
ab->len = 0;
}
/*
* Appends a single char to the altbuf.
*/
MG_INTERNAL void altbuf_append(struct altbuf *ab, char c) {
if (ab->len < ab->user_buf_size) {
/* The data fits into the original buffer */
ab->user_buf[ab->len++] = c;
} else {
/* The data can't fit into the original buffer, so write it to mbuf. */
/*
* First of all, see if that's the first byte which overflows the original
* buffer: if so, copy the existing data from there to a newly allocated
* mbuf.
*/
if (ab->len > 0 && ab->m.len == 0) {
mbuf_append(&ab->m, ab->user_buf, ab->len);
}
mbuf_append(&ab->m, &c, 1);
ab->len = ab->m.len;
}
}
/*
* Resets any data previously appended to altbuf.
*/
MG_INTERNAL void altbuf_reset(struct altbuf *ab) {
mbuf_free(&ab->m);
ab->len = 0;
}
/*
* Returns whether the additional buffer was allocated (and thus the data
* is in the mbuf, not the client-provided buffer)
*/
MG_INTERNAL int altbuf_reallocated(struct altbuf *ab) {
return ab->len > ab->user_buf_size;
}
/*
* Returns the actual buffer with data, either the client-provided or a newly
* allocated one. If `trim` is non-zero, mbuf-backed buffer is trimmed first.
*/
MG_INTERNAL char *altbuf_get_buf(struct altbuf *ab, int trim) {
if (altbuf_reallocated(ab)) {
if (trim) {
mbuf_trim(&ab->m);
}
return ab->m.buf;
} else {
return ab->user_buf;
}
}
/* }}} */
static const char *mg_version_header = "Mongoose/" MG_VERSION;
enum mg_http_proto_data_type { DATA_NONE, DATA_FILE, DATA_PUT };
struct mg_http_proto_data_file {
FILE *fp; /* Opened file. */
int64_t cl; /* Content-Length. How many bytes to send. */
int64_t sent; /* How many bytes have been already sent. */
int keepalive; /* Keep connection open after sending. */
enum mg_http_proto_data_type type;
};
#if MG_ENABLE_HTTP_CGI
struct mg_http_proto_data_cgi {
struct mg_connection *cgi_nc;
};
#endif
struct mg_http_proto_data_chuncked {
int64_t body_len; /* How many bytes of chunked body was reassembled. */
};
struct mg_http_endpoint {
struct mg_http_endpoint *next;
struct mg_str uri_pattern; /* owned */
char *auth_domain; /* owned */
char *auth_file; /* owned */
mg_event_handler_t handler;
#if MG_ENABLE_CALLBACK_USERDATA
void *user_data;
#endif
};
enum mg_http_multipart_stream_state {
MPS_BEGIN,
MPS_WAITING_FOR_BOUNDARY,
MPS_WAITING_FOR_CHUNK,
MPS_GOT_BOUNDARY,
MPS_FINALIZE,
MPS_FINISHED
};
struct mg_http_multipart_stream {
const char *boundary;
int boundary_len;
const char *var_name;
const char *file_name;
void *user_data;
enum mg_http_multipart_stream_state state;
int processing_part;
int data_avail;
};
struct mg_reverse_proxy_data {
struct mg_connection *linked_conn;
};
struct mg_ws_proto_data {
/*
* Defragmented size of the frame so far.
*
* First byte of nc->recv_mbuf.buf is an op, the rest of the data is
* defragmented data.
*/
size_t reass_len;
};
struct mg_http_proto_data {
#if MG_ENABLE_FILESYSTEM
struct mg_http_proto_data_file file;
#endif
#if MG_ENABLE_HTTP_CGI
struct mg_http_proto_data_cgi cgi;
#endif
#if MG_ENABLE_HTTP_STREAMING_MULTIPART
struct mg_http_multipart_stream mp_stream;
#endif
#if MG_ENABLE_HTTP_WEBSOCKET
struct mg_ws_proto_data ws_data;
#endif
struct mg_http_proto_data_chuncked chunk;
struct mg_http_endpoint *endpoints;
mg_event_handler_t endpoint_handler;
struct mg_reverse_proxy_data reverse_proxy_data;
size_t rcvd; /* How many bytes we have received. */
size_t body_rcvd; /* How many bytes of body we have received. */
size_t body_processed; /* How many bytes of body we have processed. */
int finished;
};
static void mg_http_proto_data_destructor(void *proto_data);
struct mg_connection *mg_connect_http_base(
struct mg_mgr *mgr, MG_CB(mg_event_handler_t ev_handler, void *user_data),
struct mg_connect_opts opts, const char *scheme1, const char *scheme2,
const char *scheme_ssl1, const char *scheme_ssl2, const char *url,
struct mg_str *path, struct mg_str *user_info, struct mg_str *host);
MG_INTERNAL struct mg_http_proto_data *mg_http_create_proto_data(
struct mg_connection *c) {
/* If we have proto data from previous connection, flush it. */
if (c->proto_data != NULL) {
void *pd = c->proto_data;
c->proto_data = NULL;
mg_http_proto_data_destructor(pd);
}
c->proto_data = MG_CALLOC(1, sizeof(struct mg_http_proto_data));
c->proto_data_destructor = mg_http_proto_data_destructor;
return (struct mg_http_proto_data *) c->proto_data;
}
static struct mg_http_proto_data *mg_http_get_proto_data(
struct mg_connection *c) {
return (struct mg_http_proto_data *) c->proto_data;
}
#if MG_ENABLE_HTTP_STREAMING_MULTIPART
static void mg_http_free_proto_data_mp_stream(
struct mg_http_multipart_stream *mp) {
MG_FREE((void *) mp->boundary);
MG_FREE((void *) mp->var_name);
MG_FREE((void *) mp->file_name);
memset(mp, 0, sizeof(*mp));
}
#endif
#if MG_ENABLE_FILESYSTEM
static void mg_http_free_proto_data_file(struct mg_http_proto_data_file *d) {
if (d != NULL) {
if (d->fp != NULL) {
fclose(d->fp);
}
memset(d, 0, sizeof(struct mg_http_proto_data_file));
}
}
#endif
static void mg_http_free_proto_data_endpoints(struct mg_http_endpoint **ep) {
struct mg_http_endpoint *current = *ep;
while (current != NULL) {
struct mg_http_endpoint *tmp = current->next;
MG_FREE((void *) current->uri_pattern.p);
MG_FREE((void *) current->auth_domain);
MG_FREE((void *) current->auth_file);
MG_FREE(current);
current = tmp;
}
*ep = NULL;
}
static void mg_http_free_reverse_proxy_data(struct mg_reverse_proxy_data *rpd) {
if (rpd->linked_conn != NULL) {
/*
* Connection has linked one, we have to unlink & close it
* since _this_ connection is going to die and
* it doesn't make sense to keep another one
*/
struct mg_http_proto_data *pd = mg_http_get_proto_data(rpd->linked_conn);
if (pd->reverse_proxy_data.linked_conn != NULL) {
pd->reverse_proxy_data.linked_conn->flags |= MG_F_SEND_AND_CLOSE;
pd->reverse_proxy_data.linked_conn = NULL;
}
rpd->linked_conn = NULL;
}
}
static void mg_http_proto_data_destructor(void *proto_data) {
struct mg_http_proto_data *pd = (struct mg_http_proto_data *) proto_data;
#if MG_ENABLE_FILESYSTEM
mg_http_free_proto_data_file(&pd->file);
#endif
#if MG_ENABLE_HTTP_CGI
mg_http_free_proto_data_cgi(&pd->cgi);
#endif
#if MG_ENABLE_HTTP_STREAMING_MULTIPART
mg_http_free_proto_data_mp_stream(&pd->mp_stream);
#endif
mg_http_free_proto_data_endpoints(&pd->endpoints);
mg_http_free_reverse_proxy_data(&pd->reverse_proxy_data);
MG_FREE(proto_data);
}
#if MG_ENABLE_FILESYSTEM
#define MIME_ENTRY(_ext, _type) \
{ _ext, sizeof(_ext) - 1, _type }
static const struct {
const char *extension;
size_t ext_len;
const char *mime_type;
} mg_static_builtin_mime_types[] = {
MIME_ENTRY("html", "text/html"),
MIME_ENTRY("html", "text/html"),
MIME_ENTRY("htm", "text/html"),
MIME_ENTRY("shtm", "text/html"),
MIME_ENTRY("shtml", "text/html"),
MIME_ENTRY("css", "text/css"),
MIME_ENTRY("js", "application/x-javascript"),
MIME_ENTRY("ico", "image/x-icon"),
MIME_ENTRY("gif", "image/gif"),
MIME_ENTRY("jpg", "image/jpeg"),
MIME_ENTRY("jpeg", "image/jpeg"),
MIME_ENTRY("png", "image/png"),
MIME_ENTRY("svg", "image/svg+xml"),
MIME_ENTRY("txt", "text/plain"),
MIME_ENTRY("torrent", "application/x-bittorrent"),
MIME_ENTRY("wav", "audio/x-wav"),
MIME_ENTRY("mp3", "audio/x-mp3"),
MIME_ENTRY("mid", "audio/mid"),
MIME_ENTRY("m3u", "audio/x-mpegurl"),
MIME_ENTRY("ogg", "application/ogg"),
MIME_ENTRY("ram", "audio/x-pn-realaudio"),
MIME_ENTRY("xml", "text/xml"),
MIME_ENTRY("ttf", "application/x-font-ttf"),
MIME_ENTRY("json", "application/json"),
MIME_ENTRY("xslt", "application/xml"),
MIME_ENTRY("xsl", "application/xml"),
MIME_ENTRY("ra", "audio/x-pn-realaudio"),
MIME_ENTRY("doc", "application/msword"),
MIME_ENTRY("exe", "application/octet-stream"),
MIME_ENTRY("zip", "application/x-zip-compressed"),
MIME_ENTRY("xls", "application/excel"),
MIME_ENTRY("tgz", "application/x-tar-gz"),
MIME_ENTRY("tar", "application/x-tar"),
MIME_ENTRY("gz", "application/x-gunzip"),
MIME_ENTRY("arj", "application/x-arj-compressed"),
MIME_ENTRY("rar", "application/x-rar-compressed"),
MIME_ENTRY("rtf", "application/rtf"),
MIME_ENTRY("pdf", "application/pdf"),
MIME_ENTRY("swf", "application/x-shockwave-flash"),
MIME_ENTRY("mpg", "video/mpeg"),
MIME_ENTRY("webm", "video/webm"),
MIME_ENTRY("mpeg", "video/mpeg"),
MIME_ENTRY("mov", "video/quicktime"),
MIME_ENTRY("mp4", "video/mp4"),
MIME_ENTRY("m4v", "video/x-m4v"),
MIME_ENTRY("asf", "video/x-ms-asf"),
MIME_ENTRY("avi", "video/x-msvideo"),
MIME_ENTRY("bmp", "image/bmp"),
{NULL, 0, NULL},
};
static struct mg_str mg_get_mime_types_entry(struct mg_str path) {
size_t i;
for (i = 0; mg_static_builtin_mime_types[i].extension != NULL; i++) {
if (path.len < mg_static_builtin_mime_types[i].ext_len + 1) continue;
struct mg_str ext = MG_MK_STR_N(mg_static_builtin_mime_types[i].extension,
mg_static_builtin_mime_types[i].ext_len);
struct mg_str pext = MG_MK_STR_N(path.p + (path.len - ext.len), ext.len);
if (pext.p[-1] == '.' && mg_strcasecmp(ext, pext) == 0) {
return mg_mk_str(mg_static_builtin_mime_types[i].mime_type);
}
}
return mg_mk_str(NULL);
}
MG_INTERNAL int mg_get_mime_type_encoding(
struct mg_str path, struct mg_str *type, struct mg_str *encoding,
const struct mg_serve_http_opts *opts) {
const char *ext, *overrides;
struct mg_str k, v;
overrides = opts->custom_mime_types;
while ((overrides = mg_next_comma_list_entry(overrides, &k, &v)) != NULL) {
ext = path.p + (path.len - k.len);
if (path.len > k.len && mg_vcasecmp(&k, ext) == 0) {
*type = v;
return 1;
}
}
*type = mg_get_mime_types_entry(path);
/* Check for .html.gz, .js.gz, etc. */
if (mg_vcmp(type, "application/x-gunzip") == 0) {
struct mg_str path2 = mg_mk_str_n(path.p, path.len - 3);
struct mg_str type2 = mg_get_mime_types_entry(path2);
LOG(LL_ERROR, ("'%.*s' '%.*s' '%.*s'", (int) path.len, path.p,
(int) path2.len, path2.p, (int) type2.len, type2.p));
if (type2.len > 0) {
*type = type2;
*encoding = mg_mk_str("gzip");
}
}
return (type->len > 0);
}
#endif
/*
* Check whether full request is buffered. Return:
* -1 if request is malformed
* 0 if request is not yet fully buffered
* >0 actual request length, including last \r\n\r\n
*/
static int mg_http_get_request_len(const char *s, int buf_len) {
const unsigned char *buf = (unsigned char *) s;
int i;
for (i = 0; i < buf_len; i++) {
if (!isprint(buf[i]) && buf[i] != '\r' && buf[i] != '\n' && buf[i] < 128) {
return -1;
} else if (buf[i] == '\n' && i + 1 < buf_len && buf[i + 1] == '\n') {
return i + 2;
} else if (buf[i] == '\n' && i + 2 < buf_len && buf[i + 1] == '\r' &&
buf[i + 2] == '\n') {
return i + 3;
}
}
return 0;
}
static const char *mg_http_parse_headers(const char *s, const char *end,
int len, struct http_message *req) {
int i = 0;
req->content_length = MG_HTTP_CONTENT_LENGTH_UNKNOWN;
while (i < (int) ARRAY_SIZE(req->header_names) - 1) {
struct mg_str *k = &req->header_names[i], *v = &req->header_values[i];
s = mg_skip(s, end, ": ", k);
s = mg_skip(s, end, "\r\n", v);
while (v->len > 0 && v->p[v->len - 1] == ' ') {
v->len--; /* Trim trailing spaces in header value */
}
/*
* If header value is empty - skip it and go to next (if any).
* NOTE: Do not add it to headers_values because such addition changes API
* behaviour
*/
if (k->len != 0 && v->len == 0) {
continue;
}
if (k->len == 0 || v->len == 0) {
k->p = v->p = NULL;
k->len = v->len = 0;
break;
}
if (mg_ncasecmp(k->p, "Content-Length", 14) == 0) {
req->body.len = (size_t) to64(v->p);
req->message.len = len + req->body.len;
req->content_length = req->body.len;
}
i++;
}
return s;
}
int mg_parse_http(const char *s, int n, struct http_message *hm, int is_req) {
const char *end, *qs;
int len = mg_http_get_request_len(s, n);
if (len <= 0) return len;
memset(hm, 0, sizeof(*hm));
hm->message.p = s;
hm->body.p = s + len;
hm->message.len = hm->body.len = (size_t) ~0;
end = s + len;
/* Request is fully buffered. Skip leading whitespaces. */
while (s < end && isspace(*(unsigned char *) s)) s++;
if (is_req) {
/* Parse request line: method, URI, proto */
s = mg_skip(s, end, " ", &hm->method);
s = mg_skip(s, end, " ", &hm->uri);
s = mg_skip(s, end, "\r\n", &hm->proto);
if (hm->uri.p <= hm->method.p || hm->proto.p <= hm->uri.p) return -1;
/* If URI contains '?' character, initialize query_string */
if ((qs = (char *) memchr(hm->uri.p, '?', hm->uri.len)) != NULL) {
hm->query_string.p = qs + 1;
hm->query_string.len = &hm->uri.p[hm->uri.len] - (qs + 1);
hm->uri.len = qs - hm->uri.p;
}
} else {
s = mg_skip(s, end, " ", &hm->proto);
if (end - s < 4 || s[0] < '0' || s[0] > '9' || s[3] != ' ') return -1;
hm->resp_code = atoi(s);
if (hm->resp_code < 100 || hm->resp_code >= 600) return -1;
s += 4;
s = mg_skip(s, end, "\r\n", &hm->resp_status_msg);
}
s = mg_http_parse_headers(s, end, len, hm);
/*
* mg_parse_http() is used to parse both HTTP requests and HTTP
* responses. If HTTP response does not have Content-Length set, then
* body is read until socket is closed, i.e. body.len is infinite (~0).
*
* For HTTP requests though, according to
* http://tools.ietf.org/html/rfc7231#section-8.1.3,
* only POST and PUT methods have defined body semantics.
* Therefore, if Content-Length is not specified and methods are
* not one of PUT or POST, set body length to 0.
*
* So,
* if it is HTTP request, and Content-Length is not set,
* and method is not (PUT or POST) then reset body length to zero.
*/
if (hm->body.len == (size_t) ~0 && is_req &&
mg_vcasecmp(&hm->method, "PUT") != 0 &&
mg_vcasecmp(&hm->method, "POST") != 0) {
hm->body.len = 0;
hm->message.len = len;
}
return len;
}
struct mg_str *mg_get_http_header(struct http_message *hm, const char *name) {
size_t i, len = strlen(name);
for (i = 0; hm->header_names[i].len > 0; i++) {
struct mg_str *h = &hm->header_names[i], *v = &hm->header_values[i];
if (h->p != NULL && h->len == len && !mg_ncasecmp(h->p, name, len))
return v;
}
return NULL;
}
#if MG_ENABLE_FILESYSTEM
static void mg_http_transfer_file_data(struct mg_connection *nc) {
struct mg_http_proto_data *pd = mg_http_get_proto_data(nc);
char buf[MG_MAX_HTTP_SEND_MBUF];
size_t n = 0, to_read = 0, left = (size_t)(pd->file.cl - pd->file.sent);
if (pd->file.type == DATA_FILE) {
struct mbuf *io = &nc->send_mbuf;
if (io->len >= MG_MAX_HTTP_SEND_MBUF) {
to_read = 0;
} else {
to_read = MG_MAX_HTTP_SEND_MBUF - io->len;
}
if (to_read > left) {
to_read = left;
}
if (to_read > 0) {
n = mg_fread(buf, 1, to_read, pd->file.fp);
if (n > 0) {
mg_send(nc, buf, n);
pd->file.sent += n;
DBG(("%p sent %d (total %d)", (void*)nc, (int) n, (int) pd->file.sent));
}
} else {
/* Rate-limited */
}
if (pd->file.sent >= pd->file.cl) {
LOG(LL_DEBUG, ("%p done, %d bytes, ka %d", (void*)nc, (int) pd->file.sent,
pd->file.keepalive));
if (!pd->file.keepalive) nc->flags |= MG_F_SEND_AND_CLOSE;
mg_http_free_proto_data_file(&pd->file);
pd->finished = 1;
}
} else if (pd->file.type == DATA_PUT) {
struct mbuf *io = &nc->recv_mbuf;
size_t to_write = left <= 0 ? 0 : left < io->len ? (size_t) left : io->len;
size_t n = mg_fwrite(io->buf, 1, to_write, pd->file.fp);
if (n > 0) {
mbuf_remove(io, n);
pd->file.sent += n;
}
if (n == 0 || pd->file.sent >= pd->file.cl) {
if (!pd->file.keepalive) nc->flags |= MG_F_SEND_AND_CLOSE;
mg_http_free_proto_data_file(&pd->file);
pd->finished = 1;
}
}
#if MG_ENABLE_HTTP_CGI
else if (pd->cgi.cgi_nc != NULL) {
/* This is POST data that needs to be forwarded to the CGI process */
if (pd->cgi.cgi_nc != NULL) {
mg_forward(nc, pd->cgi.cgi_nc);
} else {
nc->flags |= MG_F_SEND_AND_CLOSE;
}
}
#endif
}
#endif /* MG_ENABLE_FILESYSTEM */
/*
* Parse chunked-encoded buffer. Return 0 if the buffer is not encoded, or
* if it's incomplete. If the chunk is fully buffered, return total number of
* bytes in a chunk, and store data in `data`, `data_len`.
*/
static size_t mg_http_parse_chunk(char *buf, size_t len, char **chunk_data,
size_t *chunk_len) {
unsigned char *s = (unsigned char *) buf;
size_t n = 0; /* scanned chunk length */
size_t i = 0; /* index in s */
/* Scan chunk length. That should be a hexadecimal number. */
while (i < len && isxdigit(s[i])) {
n *= 16;
n += (s[i] >= '0' && s[i] <= '9') ? s[i] - '0' : tolower(s[i]) - 'a' + 10;
i++;
if (i > 6) {
/* Chunk size is unreasonable. */
return 0;
}
}
/* Skip new line */
if (i == 0 || i + 2 > len || s[i] != '\r' || s[i + 1] != '\n') {
return 0;
}
i += 2;
/* Record where the data is */
*chunk_data = (char *) s + i;
*chunk_len = n;
/* Skip data */
i += n;
/* Skip new line */
if (i == 0 || i + 2 > len || s[i] != '\r' || s[i + 1] != '\n') {
return 0;
}
return i + 2;
}
MG_INTERNAL size_t mg_handle_chunked(struct mg_connection *nc,
struct http_message *hm, char *buf,
size_t blen) {
struct mg_http_proto_data *pd = mg_http_get_proto_data(nc);
char *data;
size_t i, n, data_len, body_len, zero_chunk_received = 0;
/* Find out piece of received data that is not yet reassembled */
body_len = (size_t) pd->chunk.body_len;
assert(blen >= body_len);
/* Traverse all fully buffered chunks */
for (i = body_len;
(n = mg_http_parse_chunk(buf + i, blen - i, &data, &data_len)) > 0;
i += n) {
/* Collapse chunk data to the rest of HTTP body */
memmove(buf + body_len, data, data_len);
body_len += data_len;
hm->body.len = body_len;
if (data_len == 0) {
zero_chunk_received = 1;
i += n;
break;
}
}
if (i > body_len) {
/* Shift unparsed content to the parsed body */
assert(i <= blen);
memmove(buf + body_len, buf + i, blen - i);
memset(buf + body_len + blen - i, 0, i - body_len);
nc->recv_mbuf.len -= i - body_len;
pd->chunk.body_len = body_len;
/* Send MG_EV_HTTP_CHUNK event */
nc->flags &= ~MG_F_DELETE_CHUNK;
mg_call(nc, nc->handler, nc->user_data, MG_EV_HTTP_CHUNK, hm);
/* Delete processed data if user set MG_F_DELETE_CHUNK flag */
if (nc->flags & MG_F_DELETE_CHUNK) {
memset(buf, 0, body_len);
memmove(buf, buf + body_len, blen - i);
nc->recv_mbuf.len -= body_len;
hm->body.len = 0;
pd->chunk.body_len = 0;
}
if (zero_chunk_received) {
/* Total message size is len(body) + len(headers) */
hm->message.len =
(size_t) pd->chunk.body_len + blen - i + (hm->body.p - hm->message.p);
}
}
return body_len;
}
struct mg_http_endpoint *mg_http_get_endpoint_handler(struct mg_connection *nc,
struct mg_str *uri_path) {
struct mg_http_proto_data *pd;
struct mg_http_endpoint *ret = NULL;
int matched, matched_max = 0;
struct mg_http_endpoint *ep;
if (nc == NULL) return NULL;
pd = mg_http_get_proto_data(nc);
if (pd == NULL) return NULL;
ep = pd->endpoints;
while (ep != NULL) {
if ((matched = mg_match_prefix_n(ep->uri_pattern, *uri_path)) > 0) {
if (matched > matched_max) {
/* Looking for the longest suitable handler */
ret = ep;
matched_max = matched;
}
}
ep = ep->next;
}
return ret;
}
#if MG_ENABLE_HTTP_STREAMING_MULTIPART
static void mg_http_multipart_continue(struct mg_connection *nc);
static void mg_http_multipart_begin(struct mg_connection *nc,
struct http_message *hm, int req_len);
#endif
static void mg_http_call_endpoint_handler(struct mg_connection *nc, int ev,
struct http_message *hm);
static void deliver_chunk(struct mg_connection *c, struct http_message *hm,
struct mg_http_proto_data *pd, int req_len) {
/* Incomplete message received. Send MG_EV_HTTP_CHUNK event */
hm->body.len = c->recv_mbuf.len - req_len;
if (hm->content_length != MG_HTTP_CONTENT_LENGTH_UNKNOWN) {
size_t body_remain = hm->content_length - pd->body_processed;
if (hm->body.len > body_remain) {
hm->body.len = body_remain;
}
}
if (pd != NULL) {
pd->body_rcvd = pd->body_processed + hm->body.len;
}
c->flags &= ~MG_F_DELETE_CHUNK;
mg_call(c, c->handler, c->user_data, MG_EV_HTTP_CHUNK, hm);
/* Delete processed data if user set MG_F_DELETE_CHUNK flag */
if (c->flags & MG_F_DELETE_CHUNK) {
pd->body_processed += hm->body.len;
c->recv_mbuf.len = req_len;
hm->body.len = 0;
}
}
/*
* lx106 compiler has a bug (TODO(mkm) report and insert tracking bug here)
* If a big structure is declared in a big function, lx106 gcc will make it
* even bigger (round up to 4k, from 700 bytes of actual size).
*/
#ifdef __xtensa__
static void mg_http_handler2(struct mg_connection *nc, int ev,
void *ev_data MG_UD_ARG(void *user_data),
struct http_message *hm) __attribute__((noinline));
void mg_http_handler(struct mg_connection *nc, int ev,
void *ev_data MG_UD_ARG(void *user_data)) {
struct http_message hm;
mg_http_handler2(nc, ev, ev_data MG_UD_ARG(user_data), &hm);
}
static void mg_http_handler2(struct mg_connection *nc, int ev,
void *ev_data MG_UD_ARG(void *user_data),
struct http_message *hm) {
#else /* !__XTENSA__ */
void mg_http_handler(struct mg_connection *nc, int ev,
void *ev_data MG_UD_ARG(void *user_data)) {
struct http_message shm, *hm = &shm;
#endif /* __XTENSA__ */
struct mg_http_proto_data *pd = mg_http_get_proto_data(nc);
struct mbuf *io = &nc->recv_mbuf;
int req_len;
const int is_req = (nc->listener != NULL);
#if MG_ENABLE_HTTP_WEBSOCKET
struct mg_str *vec;
#endif
if (ev == MG_EV_CLOSE) {
#if MG_ENABLE_HTTP_CGI
/* Close associated CGI forwarder connection */
if (pd != NULL && pd->cgi.cgi_nc != NULL) {
pd->cgi.cgi_nc->user_data = NULL;
pd->cgi.cgi_nc->flags |= MG_F_CLOSE_IMMEDIATELY;
}
#endif
#if MG_ENABLE_HTTP_STREAMING_MULTIPART
if (pd != NULL && pd->mp_stream.boundary != NULL) {
/*
* Multipart message is in progress, but connection is closed.
* Finish part and request with an error flag.
*/
struct mg_http_multipart_part mp;
memset(&mp, 0, sizeof(mp));
mp.status = -1;
mp.user_data = pd->mp_stream.user_data;
mp.var_name = pd->mp_stream.var_name;
mp.file_name = pd->mp_stream.file_name;
mg_call(nc, (pd->endpoint_handler ? pd->endpoint_handler : nc->handler),
nc->user_data, MG_EV_HTTP_PART_END, &mp);
mp.var_name = NULL;
mp.file_name = NULL;
mg_call(nc, (pd->endpoint_handler ? pd->endpoint_handler : nc->handler),
nc->user_data, MG_EV_HTTP_MULTIPART_REQUEST_END, &mp);
} else
#endif
if (io->len > 0 &&
(req_len = mg_parse_http(io->buf, io->len, hm, is_req)) > 0) {
/*
* For HTTP messages without Content-Length, always send HTTP message
* before MG_EV_CLOSE message.
*/
int ev2 = is_req ? MG_EV_HTTP_REQUEST : MG_EV_HTTP_REPLY;
hm->message.len = io->len;
hm->body.len = io->buf + io->len - hm->body.p;
deliver_chunk(nc, hm, pd, req_len);
mg_http_call_endpoint_handler(nc, ev2, hm);
}
if (pd != NULL && pd->endpoint_handler != NULL &&
pd->endpoint_handler != nc->handler) {
mg_call(nc, pd->endpoint_handler, nc->user_data, ev, NULL);
}
}
#if MG_ENABLE_FILESYSTEM
if (pd != NULL && pd->file.fp != NULL) {
mg_http_transfer_file_data(nc);
if (pd->finished) {
}
}
#endif
mg_call(nc, nc->handler, nc->user_data, ev, ev_data);
#if MG_ENABLE_HTTP_STREAMING_MULTIPART
if (pd != NULL && pd->mp_stream.boundary != NULL &&
(ev == MG_EV_RECV || ev == MG_EV_POLL)) {
if (ev == MG_EV_RECV) {
pd->rcvd += *(int *) ev_data;
mg_http_multipart_continue(nc);
} else if (pd->mp_stream.data_avail) {
/* Try re-delivering the data. */
mg_http_multipart_continue(nc);
}
return;
}
#endif /* MG_ENABLE_HTTP_STREAMING_MULTIPART */
if (ev == MG_EV_RECV) {
struct mg_str *s;
again:
req_len = mg_parse_http(io->buf, io->len, hm, is_req);
if (req_len > 0 && (pd == NULL || pd->finished)) {
/* New request - new proto data */
pd = mg_http_create_proto_data(nc);
pd->rcvd = io->len;
}
if (req_len > 0 &&
(s = mg_get_http_header(hm, "Transfer-Encoding")) != NULL &&
mg_vcasecmp(s, "chunked") == 0) {
mg_handle_chunked(nc, hm, io->buf + req_len, io->len - req_len);
}
#if MG_ENABLE_HTTP_STREAMING_MULTIPART
if (req_len > 0 && (s = mg_get_http_header(hm, "Content-Type")) != NULL &&
s->len >= 9 && strncmp(s->p, "multipart", 9) == 0) {
mg_http_multipart_begin(nc, hm, req_len);
mg_http_multipart_continue(nc);
return;
}
#endif /* MG_ENABLE_HTTP_STREAMING_MULTIPART */
/* TODO(alashkin): refactor this ifelseifelseifelseifelse */
if ((req_len < 0 ||
(req_len == 0 && io->len >= MG_MAX_HTTP_REQUEST_SIZE))) {
DBG(("invalid request"));
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
} else if (req_len == 0) {
/* Do nothing, request is not yet fully buffered */
}
#if MG_ENABLE_HTTP_WEBSOCKET
else if (nc->listener == NULL && (nc->flags & MG_F_IS_WEBSOCKET)) {
/* We're websocket client, got handshake response from server. */
DBG(("%p WebSocket upgrade code %d", (void*)nc, hm->resp_code));
if (hm->resp_code == 101 &&
mg_get_http_header(hm, "Sec-WebSocket-Accept")) {
/* TODO(lsm): check the validity of accept Sec-WebSocket-Accept */
mg_call(nc, nc->handler, nc->user_data, MG_EV_WEBSOCKET_HANDSHAKE_DONE,
hm);
mbuf_remove(io, req_len);
nc->proto_handler = mg_ws_handler;
mg_ws_handler(nc, MG_EV_RECV, ev_data MG_UD_ARG(user_data));
} else {
mg_call(nc, nc->handler, nc->user_data, MG_EV_WEBSOCKET_HANDSHAKE_DONE,
hm);
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
mbuf_remove(io, req_len);
}
} else if (nc->listener != NULL &&
(vec = mg_get_http_header(hm, "Sec-WebSocket-Key")) != NULL) {
struct mg_http_endpoint *ep;
/* This is a websocket request. Switch protocol handlers. */
mbuf_remove(io, req_len);
nc->proto_handler = mg_ws_handler;
nc->flags |= MG_F_IS_WEBSOCKET;
/*
* If we have a handler set up with mg_register_http_endpoint(),
* deliver subsequent websocket events to this handler after the
* protocol switch.
*/
ep = mg_http_get_endpoint_handler(nc->listener, &hm->uri);
if (ep != NULL) {
nc->handler = ep->handler;
#if MG_ENABLE_CALLBACK_USERDATA
nc->user_data = ep->user_data;
#endif
}
/* Send handshake */
mg_call(nc, nc->handler, nc->user_data, MG_EV_WEBSOCKET_HANDSHAKE_REQUEST,
hm);
if (!(nc->flags & (MG_F_CLOSE_IMMEDIATELY | MG_F_SEND_AND_CLOSE))) {
if (nc->send_mbuf.len == 0) {
mg_ws_handshake(nc, vec, hm);
}
mg_call(nc, nc->handler, nc->user_data, MG_EV_WEBSOCKET_HANDSHAKE_DONE,
hm);
mg_ws_handler(nc, MG_EV_RECV, ev_data MG_UD_ARG(user_data));
}
}
#endif /* MG_ENABLE_HTTP_WEBSOCKET */
else {
deliver_chunk(nc, hm, pd, req_len);
if (hm->message.len > pd->rcvd &&
(hm->content_length == MG_HTTP_CONTENT_LENGTH_UNKNOWN ||
pd->body_rcvd < hm->content_length)) {
/* Not yet received all HTTP body, deliver MG_EV_HTTP_CHUNK */
if (nc->recv_mbuf_limit > 0 &&
nc->recv_mbuf.len >= nc->recv_mbuf_limit) {
LOG(LL_ERROR, ("%p recv buffer (%lu bytes) exceeds the limit "
"%lu bytes, and not drained, closing",
(void*)nc, (unsigned long) nc->recv_mbuf.len,
(unsigned long) nc->recv_mbuf_limit));
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
}
} else {
/* We did receive all HTTP body. */
int request_done = 1;
int trigger_ev = nc->listener ? MG_EV_HTTP_REQUEST : MG_EV_HTTP_REPLY;
char addr[32];
mg_sock_addr_to_str(&nc->sa, addr, sizeof(addr),
MG_SOCK_STRINGIFY_IP | MG_SOCK_STRINGIFY_PORT);
DBG(("%p %s %.*s %.*s", (void*)nc, addr, (int) hm->method.len, hm->method.p,
(int) hm->uri.len, hm->uri.p));
/* Whole HTTP message is fully buffered, call event handler */
mg_http_call_endpoint_handler(nc, trigger_ev, hm);
mbuf_remove(io, req_len + hm->body.len);
pd->rcvd -= hm->message.len;
pd->body_rcvd = 0;
#if MG_ENABLE_FILESYSTEM
/* We don't have a generic mechanism of communicating that we are done
* responding to a request (should probably add one). But if we are
* serving
* a file, we are definitely not done. */
if (pd->file.fp != NULL) request_done = 0;
#endif
#if MG_ENABLE_HTTP_CGI
/* If this is a CGI request, we are not done either. */
if (pd->cgi.cgi_nc != NULL) request_done = 0;
#endif
pd->finished = request_done;
DBG(("%p finished %d ml %d bl %d", (void*)nc, pd->finished,
(int) hm->message.len, (int) hm->body.len));
if (request_done && io->len > 0) goto again;
}
}
}
}
static size_t mg_get_line_len(const char *buf, size_t buf_len) {
size_t len = 0;
while (len < buf_len && buf[len] != '\n') len++;
return len == buf_len ? 0 : len + 1;
}
#if MG_ENABLE_HTTP_STREAMING_MULTIPART
static void mg_http_multipart_begin(struct mg_connection *nc,
struct http_message *hm, int req_len) {
struct mg_http_proto_data *pd = mg_http_get_proto_data(nc);
struct mg_str *ct;
struct mbuf *io = &nc->recv_mbuf;
char boundary_buf[100];
char *boundary = boundary_buf;
int boundary_len;
ct = mg_get_http_header(hm, "Content-Type");
if (ct == NULL) {
/* We need more data - or it isn't multipart mesage */
goto exit_mp;
}
/* Content-type should start with "multipart" */
if (ct->len < 9 || strncmp(ct->p, "multipart", 9) != 0) {
goto exit_mp;
}
boundary_len =
mg_http_parse_header2(ct, "boundary", &boundary, sizeof(boundary_buf));
if (boundary_len == 0) {
/*
* Content type is multipart, but there is no boundary,
* probably malformed request
*/
nc->flags = MG_F_CLOSE_IMMEDIATELY;
DBG(("invalid request"));
goto exit_mp;
}
/* If we reach this place - that is multipart request */
if (pd->mp_stream.boundary != NULL) {
/*
* Another streaming request was in progress,
* looks like protocol error
*/
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
} else {
struct mg_http_endpoint *ep = NULL;
pd->mp_stream.state = MPS_BEGIN;
pd->mp_stream.boundary = strdup(boundary);
pd->mp_stream.boundary_len = strlen(boundary);
pd->mp_stream.var_name = pd->mp_stream.file_name = NULL;
pd->endpoint_handler = nc->handler;
ep = mg_http_get_endpoint_handler(nc->listener, &hm->uri);
if (ep != NULL) {
pd->endpoint_handler = ep->handler;
}
mg_http_call_endpoint_handler(nc, MG_EV_HTTP_MULTIPART_REQUEST, hm);
mbuf_remove(io, req_len);
}
exit_mp:
if (boundary != boundary_buf) MG_FREE(boundary);
}
#define CONTENT_DISPOSITION "Content-Disposition: "
static size_t mg_http_multipart_call_handler(struct mg_connection *c, int ev,
const char *data,
size_t data_len) {
struct mg_http_multipart_part mp;
struct mg_http_proto_data *pd = mg_http_get_proto_data(c);
memset(&mp, 0, sizeof(mp));
mp.var_name = pd->mp_stream.var_name;
mp.file_name = pd->mp_stream.file_name;
mp.user_data = pd->mp_stream.user_data;
mp.data.p = data;
mp.data.len = data_len;
mp.num_data_consumed = data_len;
mg_call(c, pd->endpoint_handler, c->user_data, ev, &mp);
pd->mp_stream.user_data = mp.user_data;
pd->mp_stream.data_avail = (mp.num_data_consumed != data_len);
return mp.num_data_consumed;
}
static int mg_http_multipart_finalize(struct mg_connection *c) {
struct mg_http_proto_data *pd = mg_http_get_proto_data(c);
mg_http_multipart_call_handler(c, MG_EV_HTTP_PART_END, NULL, 0);
MG_FREE((void *) pd->mp_stream.file_name);
pd->mp_stream.file_name = NULL;
MG_FREE((void *) pd->mp_stream.var_name);
pd->mp_stream.var_name = NULL;
mg_http_multipart_call_handler(c, MG_EV_HTTP_MULTIPART_REQUEST_END, NULL, 0);
mg_http_free_proto_data_mp_stream(&pd->mp_stream);
pd->mp_stream.state = MPS_FINISHED;
return 1;
}
static int mg_http_multipart_wait_for_boundary(struct mg_connection *c) {
const char *boundary;
struct mbuf *io = &c->recv_mbuf;
struct mg_http_proto_data *pd = mg_http_get_proto_data(c);
if (pd->mp_stream.boundary == NULL) {
pd->mp_stream.state = MPS_FINALIZE;
DBG(("Invalid request: boundary not initialized"));
return 0;
}
if ((int) io->len < pd->mp_stream.boundary_len + 2) {
return 0;
}
boundary = c_strnstr(io->buf, pd->mp_stream.boundary, io->len);
if (boundary != NULL) {
const char *boundary_end = (boundary + pd->mp_stream.boundary_len);
if (io->len - (boundary_end - io->buf) < 4) {
return 0;
}
if (strncmp(boundary_end, "--\r\n", 4) == 0) {
pd->mp_stream.state = MPS_FINALIZE;
mbuf_remove(io, (boundary_end - io->buf) + 4);
} else {
pd->mp_stream.state = MPS_GOT_BOUNDARY;
}
} else {
return 0;
}
return 1;
}
static void mg_http_parse_header_internal(struct mg_str *hdr,
const char *var_name,
struct altbuf *ab);
static int mg_http_multipart_process_boundary(struct mg_connection *c) {
int data_size;
const char *boundary, *block_begin;
struct mbuf *io = &c->recv_mbuf;
struct mg_http_proto_data *pd = mg_http_get_proto_data(c);
struct altbuf ab_file_name, ab_var_name;
int line_len;
boundary = c_strnstr(io->buf, pd->mp_stream.boundary, io->len);
block_begin = boundary + pd->mp_stream.boundary_len + 2;
data_size = io->len - (block_begin - io->buf);
altbuf_init(&ab_file_name, NULL, 0);
altbuf_init(&ab_var_name, NULL, 0);
while (data_size > 0 &&
(line_len = mg_get_line_len(block_begin, data_size)) != 0) {
if (line_len > (int) sizeof(CONTENT_DISPOSITION) &&
mg_ncasecmp(block_begin, CONTENT_DISPOSITION,
sizeof(CONTENT_DISPOSITION) - 1) == 0) {
struct mg_str header;
header.p = block_begin + sizeof(CONTENT_DISPOSITION) - 1;
header.len = line_len - sizeof(CONTENT_DISPOSITION) - 1;
altbuf_reset(&ab_var_name);
mg_http_parse_header_internal(&header, "name", &ab_var_name);
altbuf_reset(&ab_file_name);
mg_http_parse_header_internal(&header, "filename", &ab_file_name);
block_begin += line_len;
data_size -= line_len;
continue;
}
if (line_len == 2 && mg_ncasecmp(block_begin, "\r\n", 2) == 0) {
mbuf_remove(io, block_begin - io->buf + 2);
if (pd->mp_stream.processing_part != 0) {
mg_http_multipart_call_handler(c, MG_EV_HTTP_PART_END, NULL, 0);
}
/* Reserve 2 bytes for "\r\n" in file_name and var_name */
altbuf_append(&ab_file_name, '\0');
altbuf_append(&ab_file_name, '\0');
altbuf_append(&ab_var_name, '\0');
altbuf_append(&ab_var_name, '\0');
MG_FREE((void *) pd->mp_stream.file_name);
pd->mp_stream.file_name = altbuf_get_buf(&ab_file_name, 1 /* trim */);
MG_FREE((void *) pd->mp_stream.var_name);
pd->mp_stream.var_name = altbuf_get_buf(&ab_var_name, 1 /* trim */);
mg_http_multipart_call_handler(c, MG_EV_HTTP_PART_BEGIN, NULL, 0);
pd->mp_stream.state = MPS_WAITING_FOR_CHUNK;
pd->mp_stream.processing_part++;
return 1;
}
block_begin += line_len;
}
pd->mp_stream.state = MPS_WAITING_FOR_BOUNDARY;
altbuf_reset(&ab_var_name);
altbuf_reset(&ab_file_name);
return 0;
}
static int mg_http_multipart_continue_wait_for_chunk(struct mg_connection *c) {
struct mg_http_proto_data *pd = mg_http_get_proto_data(c);
struct mbuf *io = &c->recv_mbuf;
const char *boundary;
if ((int) io->len < pd->mp_stream.boundary_len + 6 /* \r\n, --, -- */) {
return 0;
}
boundary = c_strnstr(io->buf, pd->mp_stream.boundary, io->len);
if (boundary == NULL) {
int data_len = (io->len - (pd->mp_stream.boundary_len + 6));
if (data_len > 0) {
size_t consumed = mg_http_multipart_call_handler(
c, MG_EV_HTTP_PART_DATA, io->buf, (size_t) data_len);
mbuf_remove(io, consumed);
}
return 0;
} else if (boundary != NULL) {
size_t data_len = ((size_t)(boundary - io->buf) - 4);
size_t consumed = mg_http_multipart_call_handler(c, MG_EV_HTTP_PART_DATA,
io->buf, data_len);
mbuf_remove(io, consumed);
if (consumed == data_len) {
mbuf_remove(io, 4);
pd->mp_stream.state = MPS_WAITING_FOR_BOUNDARY;
return 1;
} else {
return 0;
}
} else {
return 0;
}
}
static void mg_http_multipart_continue(struct mg_connection *c) {
struct mg_http_proto_data *pd = mg_http_get_proto_data(c);
while (1) {
switch (pd->mp_stream.state) {
case MPS_BEGIN: {
pd->mp_stream.state = MPS_WAITING_FOR_BOUNDARY;
break;
}
case MPS_WAITING_FOR_BOUNDARY: {
if (mg_http_multipart_wait_for_boundary(c) == 0) {
return;
}
break;
}
case MPS_GOT_BOUNDARY: {
if (mg_http_multipart_process_boundary(c) == 0) {
return;
}
break;
}
case MPS_WAITING_FOR_CHUNK: {
if (mg_http_multipart_continue_wait_for_chunk(c) == 0) {
return;
}
break;
}
case MPS_FINALIZE: {
if (mg_http_multipart_finalize(c) == 0) {
return;
}
break;
}
case MPS_FINISHED: {
return;
}
}
}
}
struct file_upload_state {
char *lfn;
size_t num_recd;
FILE *fp;
};
#endif /* MG_ENABLE_HTTP_STREAMING_MULTIPART */
void mg_set_protocol_http_websocket(struct mg_connection *nc) {
nc->proto_handler = mg_http_handler;
}
const char *mg_status_message(int status_code) {
switch (status_code) {
case 206:
return "Partial Content";
case 301:
return "Moved";
case 302:
return "Found";
case 400:
return "Bad Request";
case 401:
return "Unauthorized";
case 403:
return "Forbidden";
case 404:
return "Not Found";
case 416:
return "Requested Range Not Satisfiable";
case 418:
return "I'm a teapot";
case 500:
return "Internal Server Error";
case 502:
return "Bad Gateway";
case 503:
return "Service Unavailable";
#if MG_ENABLE_EXTRA_ERRORS_DESC
case 100:
return "Continue";
case 101:
return "Switching Protocols";
case 102:
return "Processing";
case 200:
return "OK";
case 201:
return "Created";
case 202:
return "Accepted";
case 203:
return "Non-Authoritative Information";
case 204:
return "No Content";
case 205:
return "Reset Content";
case 207:
return "Multi-Status";
case 208:
return "Already Reported";
case 226:
return "IM Used";
case 300:
return "Multiple Choices";
case 303:
return "See Other";
case 304:
return "Not Modified";
case 305:
return "Use Proxy";
case 306:
return "Switch Proxy";
case 307:
return "Temporary Redirect";
case 308:
return "Permanent Redirect";
case 402:
return "Payment Required";
case 405:
return "Method Not Allowed";
case 406:
return "Not Acceptable";
case 407:
return "Proxy Authentication Required";
case 408:
return "Request Timeout";
case 409:
return "Conflict";
case 410:
return "Gone";
case 411:
return "Length Required";
case 412:
return "Precondition Failed";
case 413:
return "Payload Too Large";
case 414:
return "URI Too Long";
case 415:
return "Unsupported Media Type";
case 417:
return "Expectation Failed";
case 422:
return "Unprocessable Entity";
case 423:
return "Locked";
case 424:
return "Failed Dependency";
case 426:
return "Upgrade Required";
case 428:
return "Precondition Required";
case 429:
return "Too Many Requests";
case 431:
return "Request Header Fields Too Large";
case 451:
return "Unavailable For Legal Reasons";
case 501:
return "Not Implemented";
case 504:
return "Gateway Timeout";
case 505:
return "HTTP Version Not Supported";
case 506:
return "Variant Also Negotiates";
case 507:
return "Insufficient Storage";
case 508:
return "Loop Detected";
case 510:
return "Not Extended";
case 511:
return "Network Authentication Required";
#endif /* MG_ENABLE_EXTRA_ERRORS_DESC */
default:
return "OK";
}
}
void mg_send_response_line_s(struct mg_connection *nc, int status_code,
const struct mg_str extra_headers) {
mg_printf(nc, "HTTP/1.1 %d %s\r\n", status_code,
mg_status_message(status_code));
#ifndef MG_HIDE_SERVER_INFO
mg_printf(nc, "Server: %s\r\n", mg_version_header);
#endif
if (extra_headers.len > 0) {
mg_printf(nc, "%.*s\r\n", (int) extra_headers.len, extra_headers.p);
}
}
void mg_send_response_line(struct mg_connection *nc, int status_code,
const char *extra_headers) {
mg_send_response_line_s(nc, status_code, mg_mk_str(extra_headers));
}
void mg_http_send_redirect(struct mg_connection *nc, int status_code,
const struct mg_str location,
const struct mg_str extra_headers) {
char bbody[100], *pbody = bbody;
int bl = mg_asprintf(&pbody, sizeof(bbody),
"Moved here.\r\n",
(int) location.len, location.p);
char bhead[150], *phead = bhead;
mg_asprintf(&phead, sizeof(bhead),
"Location: %.*s\r\n"
"Content-Type: text/html\r\n"
"Content-Length: %d\r\n"
"Cache-Control: no-cache\r\n"
"%.*s%s",
(int) location.len, location.p, bl, (int) extra_headers.len,
extra_headers.p, (extra_headers.len > 0 ? "\r\n" : ""));
mg_send_response_line(nc, status_code, phead);
if (phead != bhead) MG_FREE(phead);
mg_send(nc, pbody, bl);
if (pbody != bbody) MG_FREE(pbody);
}
void mg_send_head(struct mg_connection *c, int status_code,
int64_t content_length, const char *extra_headers) {
mg_send_response_line(c, status_code, extra_headers);
if (content_length < 0) {
mg_printf(c, "%s", "Transfer-Encoding: chunked\r\n");
} else {
mg_printf(c, "Content-Length: %" INT64_FMT "\r\n", content_length);
}
mg_send(c, "\r\n", 2);
}
void mg_http_send_error(struct mg_connection *nc, int code,
const char *reason) {
if (!reason) reason = mg_status_message(code);
LOG(LL_DEBUG, ("%p %d %s", (void*)nc, code, reason));
mg_send_head(nc, code, strlen(reason),
"Content-Type: text/plain\r\nConnection: close");
mg_send(nc, reason, strlen(reason));
nc->flags |= MG_F_SEND_AND_CLOSE;
}
#if MG_ENABLE_FILESYSTEM
static void mg_http_construct_etag(char *buf, size_t buf_len,
const cs_stat_t *st) {
snprintf(buf, buf_len, "\"%lx.%" INT64_FMT "\"", (unsigned long) st->st_mtime,
(int64_t) st->st_size);
}
#ifndef WINCE
static void mg_gmt_time_string(char *buf, size_t buf_len, time_t *t) {
strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t));
}
#else
/* Look wince_lib.c for WindowsCE implementation */
static void mg_gmt_time_string(char *buf, size_t buf_len, time_t *t);
#endif
static int mg_http_parse_range_header(const struct mg_str *header, int64_t *a,
int64_t *b) {
/*
* There is no snscanf. Headers are not guaranteed to be NUL-terminated,
* so we have this. Ugh.
*/
int result;
char *p = (char *) MG_MALLOC(header->len + 1);
if (p == NULL) return 0;
memcpy(p, header->p, header->len);
p[header->len] = '\0';
result = sscanf(p, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b);
MG_FREE(p);
return result;
}
void mg_http_serve_file_internal(struct mg_connection *nc,
struct http_message *hm, const char *path,
struct mg_str mime_type,
struct mg_str encoding,
struct mg_str extra_headers) {
struct mg_http_proto_data *pd = mg_http_get_proto_data(nc);
cs_stat_t st;
LOG(LL_DEBUG, ("%p [%s] %.*s %.*s", (void*)nc, path, (int) mime_type.len,
mime_type.p, (int) encoding.len, encoding.p));
if (mg_stat(path, &st) != 0 || (pd->file.fp = mg_fopen(path, "rb")) == NULL) {
int code, err = mg_get_errno();
switch (err) {
case EACCES:
code = 403;
break;
case ENOENT:
code = 404;
break;
default:
code = 500;
};
mg_http_send_error(nc, code, "Open failed");
} else {
char etag[50], current_time[50], last_modified[50], range[70];
time_t t = (time_t) mg_time();
int64_t r1 = 0, r2 = 0, cl = st.st_size;
struct mg_str *range_hdr = mg_get_http_header(hm, "Range");
int n, status_code = 200;
/* Handle Range header */
range[0] = '\0';
if (range_hdr != NULL &&
(n = mg_http_parse_range_header(range_hdr, &r1, &r2)) > 0 && r1 >= 0 &&
r2 >= 0) {
/* If range is specified like "400-", set second limit to content len */
if (n == 1) {
r2 = cl - 1;
}
if (r1 > r2 || r2 >= cl) {
status_code = 416;
cl = 0;
snprintf(range, sizeof(range),
"Content-Range: bytes */%" INT64_FMT "\r\n",
(int64_t) st.st_size);
} else {
status_code = 206;
cl = r2 - r1 + 1;
snprintf(range, sizeof(range),
"Content-Range: bytes %" INT64_FMT "-%" INT64_FMT
"/%" INT64_FMT "\r\n",
r1, r1 + cl - 1, (int64_t) st.st_size);
#if _FILE_OFFSET_BITS == 64 || _POSIX_C_SOURCE >= 200112L || \
_XOPEN_SOURCE >= 600
fseeko(pd->file.fp, r1, SEEK_SET);
#else
fseek(pd->file.fp, (long) r1, SEEK_SET);
#endif
}
}
#if !MG_DISABLE_HTTP_KEEP_ALIVE
{
struct mg_str *conn_hdr = mg_get_http_header(hm, "Connection");
if (conn_hdr != NULL) {
pd->file.keepalive = (mg_vcasecmp(conn_hdr, "keep-alive") == 0);
} else {
pd->file.keepalive = (mg_vcmp(&hm->proto, "HTTP/1.1") == 0);
}
}
#endif
mg_http_construct_etag(etag, sizeof(etag), &st);
mg_gmt_time_string(current_time, sizeof(current_time), &t);
mg_gmt_time_string(last_modified, sizeof(last_modified), &st.st_mtime);
mg_send_response_line_s(nc, status_code, extra_headers);
mg_printf(nc,
"Date: %s\r\n"
"Last-Modified: %s\r\n"
"Accept-Ranges: bytes\r\n"
"Content-Type: %.*s\r\n"
"Connection: %s\r\n"
"Content-Length: %" SIZE_T_FMT
"\r\n"
"%s"
"Etag: %s\r\n",
current_time, last_modified, (int) mime_type.len, mime_type.p,
(pd->file.keepalive ? "keep-alive" : "close"), (size_t) cl, range,
etag);
if (encoding.len > 0) {
mg_printf(nc, "Content-Encoding: %.*s\r\n", (int) encoding.len,
encoding.p);
}
mg_send(nc, "\r\n", 2);
pd->file.cl = cl;
pd->file.type = DATA_FILE;
mg_http_transfer_file_data(nc);
}
}
void mg_http_serve_file(struct mg_connection *nc, struct http_message *hm,
const char *path, const struct mg_str mime_type,
const struct mg_str extra_headers) {
mg_http_serve_file_internal(nc, hm, path, mime_type, mg_mk_str(NULL),
extra_headers);
}
static void mg_http_serve_file2(struct mg_connection *nc, const char *path,
struct http_message *hm,
struct mg_serve_http_opts *opts) {
#if MG_ENABLE_HTTP_SSI
if (mg_match_prefix(opts->ssi_pattern, strlen(opts->ssi_pattern), path) > 0) {
mg_handle_ssi_request(nc, hm, path, opts);
return;
}
#endif
struct mg_str type = MG_NULL_STR, encoding = MG_NULL_STR;
if (!mg_get_mime_type_encoding(mg_mk_str(path), &type, &encoding, opts)) {
type = mg_mk_str("text/plain");
}
mg_http_serve_file_internal(nc, hm, path, type, encoding,
mg_mk_str(opts->extra_headers));
}
#endif
int mg_url_decode(const char *src, int src_len, char *dst, int dst_len,
int is_form_url_encoded) {
int i, j, a, b;
#define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) {
if (src[i] == '%') {
if (i < src_len - 2 && isxdigit(*(const unsigned char *) (src + i + 1)) &&
isxdigit(*(const unsigned char *) (src + i + 2))) {
a = tolower(*(const unsigned char *) (src + i + 1));
b = tolower(*(const unsigned char *) (src + i + 2));
dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b));
i += 2;
} else {
return -1;
}
} else if (is_form_url_encoded && src[i] == '+') {
dst[j] = ' ';
} else {
dst[j] = src[i];
}
}
dst[j] = '\0'; /* Null-terminate the destination */
return i >= src_len ? j : -1;
}
int mg_get_http_var(const struct mg_str *buf, const char *name, char *dst,
size_t dst_len) {
const char *p, *e, *s;
size_t name_len;
int len;
/*
* According to the documentation function returns negative
* value in case of error. For debug purposes it returns:
* -1 - src is wrong (NUUL)
* -2 - dst is wrong (NULL)
* -3 - failed to decode url or dst is to small
* -4 - name does not exist
*/
if (dst == NULL || dst_len == 0) {
len = -2;
} else if (buf->p == NULL || name == NULL || buf->len == 0) {
len = -1;
dst[0] = '\0';
} else {
name_len = strlen(name);
e = buf->p + buf->len;
len = -4;
dst[0] = '\0';
for (p = buf->p; p + name_len < e; p++) {
if ((p == buf->p || p[-1] == '&') && p[name_len] == '=' &&
!mg_ncasecmp(name, p, name_len)) {
p += name_len + 1;
s = (const char *) memchr(p, '&', (size_t)(e - p));
if (s == NULL) {
s = e;
}
len = mg_url_decode(p, (size_t)(s - p), dst, dst_len, 1);
/* -1 means: failed to decode or dst is too small */
if (len == -1) {
len = -3;
}
break;
}
}
}
return len;
}
void mg_send_http_chunk(struct mg_connection *nc, const char *buf, size_t len) {
char chunk_size[50];
int n;
n = snprintf(chunk_size, sizeof(chunk_size), "%lX\r\n", (unsigned long) len);
mg_send(nc, chunk_size, n);
mg_send(nc, buf, len);
mg_send(nc, "\r\n", 2);
}
void mg_printf_http_chunk(struct mg_connection *nc, const char *fmt, ...) {
char mem[MG_VPRINTF_BUFFER_SIZE], *buf = mem;
int len;
va_list ap;
va_start(ap, fmt);
len = mg_avprintf(&buf, sizeof(mem), fmt, ap);
va_end(ap);
if (len >= 0) {
mg_send_http_chunk(nc, buf, len);
}
/* LCOV_EXCL_START */
if (buf != mem && buf != NULL) {
MG_FREE(buf);
}
/* LCOV_EXCL_STOP */
}
void mg_printf_html_escape(struct mg_connection *nc, const char *fmt, ...) {
char mem[MG_VPRINTF_BUFFER_SIZE], *buf = mem;
int i, j, len;
va_list ap;
va_start(ap, fmt);
len = mg_avprintf(&buf, sizeof(mem), fmt, ap);
va_end(ap);
if (len >= 0) {
for (i = j = 0; i < len; i++) {
if (buf[i] == '<' || buf[i] == '>') {
mg_send(nc, buf + j, i - j);
mg_send(nc, buf[i] == '<' ? "<" : ">", 4);
j = i + 1;
}
}
mg_send(nc, buf + j, i - j);
}
/* LCOV_EXCL_START */
if (buf != mem && buf != NULL) {
MG_FREE(buf);
}
/* LCOV_EXCL_STOP */
}
static void mg_http_parse_header_internal(struct mg_str *hdr,
const char *var_name,
struct altbuf *ab) {
int ch = ' ', ch1 = ',', ch2 = ';', n = strlen(var_name);
const char *p, *end = hdr ? hdr->p + hdr->len : NULL, *s = NULL;
/* Find where variable starts */
for (s = hdr->p; s != NULL && s + n < end; s++) {
if ((s == hdr->p || s[-1] == ch || s[-1] == ch1 || s[-1] == ';') &&
s[n] == '=' && !strncmp(s, var_name, n))
break;
}
if (s != NULL && &s[n + 1] < end) {
s += n + 1;
if (*s == '"' || *s == '\'') {
ch = ch1 = ch2 = *s++;
}
p = s;
while (p < end && p[0] != ch && p[0] != ch1 && p[0] != ch2) {
if (ch != ' ' && p[0] == '\\' && p[1] == ch) p++;
altbuf_append(ab, *p++);
}
if (ch != ' ' && *p != ch) {
altbuf_reset(ab);
}
}
/* If there is some data, append a NUL. */
if (ab->len > 0) {
altbuf_append(ab, '\0');
}
}
int mg_http_parse_header2(struct mg_str *hdr, const char *var_name, char **buf,
size_t buf_size) {
struct altbuf ab;
altbuf_init(&ab, *buf, buf_size);
if (hdr == NULL) return 0;
if (*buf != NULL && buf_size > 0) *buf[0] = '\0';
mg_http_parse_header_internal(hdr, var_name, &ab);
/*
* Get a (trimmed) buffer, and return a len without a NUL byte which might
* have been added.
*/
*buf = altbuf_get_buf(&ab, 1 /* trim */);
return ab.len > 0 ? ab.len - 1 : 0;
}
int mg_http_parse_header(struct mg_str *hdr, const char *var_name, char *buf,
size_t buf_size) {
char *buf2 = buf;
int len = mg_http_parse_header2(hdr, var_name, &buf2, buf_size);
if (buf2 != buf) {
/* Buffer was not enough and was reallocated: free it and just return 0 */
MG_FREE(buf2);
return 0;
}
return len;
}
int mg_get_http_basic_auth(struct http_message *hm, char *user, size_t user_len,
char *pass, size_t pass_len) {
struct mg_str *hdr = mg_get_http_header(hm, "Authorization");
if (hdr == NULL) return -1;
return mg_parse_http_basic_auth(hdr, user, user_len, pass, pass_len);
}
int mg_parse_http_basic_auth(struct mg_str *hdr, char *user, size_t user_len,
char *pass, size_t pass_len) {
char *buf = NULL;
char fmt[64];
int res = 0;
if (mg_strncmp(*hdr, mg_mk_str("Basic "), 6) != 0) return -1;
buf = (char *) MG_MALLOC(hdr->len);
cs_base64_decode((unsigned char *) hdr->p + 6, hdr->len, buf, NULL);
/* e.g. "%123[^:]:%321[^\n]" */
snprintf(fmt, sizeof(fmt), "%%%" SIZE_T_FMT "[^:]:%%%" SIZE_T_FMT "[^\n]",
user_len - 1, pass_len - 1);
if (sscanf(buf, fmt, user, pass) == 0) {
res = -1;
}
MG_FREE(buf);
return res;
}
#if MG_ENABLE_FILESYSTEM
static int mg_is_file_hidden(const char *path,
const struct mg_serve_http_opts *opts,
int exclude_specials) {
const char *p1 = opts->per_directory_auth_file;
const char *p2 = opts->hidden_file_pattern;
/* Strip directory path from the file name */
const char *pdir = strrchr(path, DIRSEP);
if (pdir != NULL) {
path = pdir + 1;
}
return (exclude_specials && (!strcmp(path, ".") || !strcmp(path, ".."))) ||
(p1 != NULL && mg_match_prefix(p1, strlen(p1), path) == strlen(p1)) ||
(p2 != NULL && mg_match_prefix(p2, strlen(p2), path) > 0);
}
#if !MG_DISABLE_HTTP_DIGEST_AUTH
#ifndef MG_EXT_MD5
void mg_hash_md5_v(size_t num_msgs, const uint8_t *msgs[],
const size_t *msg_lens, uint8_t *digest) {
size_t i;
cs_md5_ctx md5_ctx;
cs_md5_init(&md5_ctx);
for (i = 0; i < num_msgs; i++) {
cs_md5_update(&md5_ctx, msgs[i], msg_lens[i]);
}
cs_md5_final(digest, &md5_ctx);
}
#else
extern void mg_hash_md5_v(size_t num_msgs, const uint8_t *msgs[],
const size_t *msg_lens, uint8_t *digest);
#endif
void cs_md5(char buf[33], ...) {
unsigned char hash[16];
const uint8_t *msgs[20], *p;
size_t msg_lens[20];
size_t num_msgs = 0;
va_list ap;
va_start(ap, buf);
while ((p = va_arg(ap, const unsigned char *)) != NULL) {
msgs[num_msgs] = p;
msg_lens[num_msgs] = va_arg(ap, size_t);
num_msgs++;
}
va_end(ap);
mg_hash_md5_v(num_msgs, msgs, msg_lens, hash);
cs_to_hex(buf, hash, sizeof(hash));
}
static void mg_mkmd5resp(const char *method, size_t method_len, const char *uri,
size_t uri_len, const char *ha1, size_t ha1_len,
const char *nonce, size_t nonce_len, const char *nc,
size_t nc_len, const char *cnonce, size_t cnonce_len,
const char *qop, size_t qop_len, char *resp) {
static const char colon[] = ":";
static const size_t one = 1;
char ha2[33];
cs_md5(ha2, method, method_len, colon, one, uri, uri_len, NULL);
cs_md5(resp, ha1, ha1_len, colon, one, nonce, nonce_len, colon, one, nc,
nc_len, colon, one, cnonce, cnonce_len, colon, one, qop, qop_len,
colon, one, ha2, sizeof(ha2) - 1, NULL);
}
int mg_http_create_digest_auth_header(char *buf, size_t buf_len,
const char *method, const char *uri,
const char *auth_domain, const char *user,
const char *passwd, const char *nonce) {
static const char colon[] = ":", qop[] = "auth";
static const size_t one = 1;
char ha1[33], resp[33], cnonce[40];
snprintf(cnonce, sizeof(cnonce), "%lx", (unsigned long) mg_time());
cs_md5(ha1, user, (size_t) strlen(user), colon, one, auth_domain,
(size_t) strlen(auth_domain), colon, one, passwd,
(size_t) strlen(passwd), NULL);
mg_mkmd5resp(method, strlen(method), uri, strlen(uri), ha1, sizeof(ha1) - 1,
nonce, strlen(nonce), "1", one, cnonce, strlen(cnonce), qop,
sizeof(qop) - 1, resp);
return snprintf(buf, buf_len,
"Authorization: Digest username=\"%s\","
"realm=\"%s\",uri=\"%s\",qop=%s,nc=1,cnonce=%s,"
"nonce=%s,response=%s\r\n",
user, auth_domain, uri, qop, cnonce, nonce, resp);
}
/*
* Check for authentication timeout.
* Clients send time stamp encoded in nonce. Make sure it is not too old,
* to prevent replay attacks.
* Assumption: nonce is a hexadecimal number of seconds since 1970.
*/
static int mg_check_nonce(const char *nonce) {
unsigned long now = (unsigned long) mg_time();
unsigned long val = (unsigned long) strtoul(nonce, NULL, 16);
return (now >= val) && (now - val < 60 * 60);
}
int mg_http_check_digest_auth(struct http_message *hm, const char *auth_domain,
FILE *fp) {
int ret = 0;
struct mg_str *hdr;
char username_buf[50], cnonce_buf[64], response_buf[40], uri_buf[200],
qop_buf[20], nc_buf[20], nonce_buf[16];
char *username = username_buf, *cnonce = cnonce_buf, *response = response_buf,
*uri = uri_buf, *qop = qop_buf, *nc = nc_buf, *nonce = nonce_buf;
/* Parse "Authorization:" header, fail fast on parse error */
if (hm == NULL || fp == NULL ||
(hdr = mg_get_http_header(hm, "Authorization")) == NULL ||
mg_http_parse_header2(hdr, "username", &username, sizeof(username_buf)) ==
0 ||
mg_http_parse_header2(hdr, "cnonce", &cnonce, sizeof(cnonce_buf)) == 0 ||
mg_http_parse_header2(hdr, "response", &response, sizeof(response_buf)) ==
0 ||
mg_http_parse_header2(hdr, "uri", &uri, sizeof(uri_buf)) == 0 ||
mg_http_parse_header2(hdr, "qop", &qop, sizeof(qop_buf)) == 0 ||
mg_http_parse_header2(hdr, "nc", &nc, sizeof(nc_buf)) == 0 ||
mg_http_parse_header2(hdr, "nonce", &nonce, sizeof(nonce_buf)) == 0 ||
mg_check_nonce(nonce) == 0) {
ret = 0;
goto clean;
}
/* NOTE(lsm): due to a bug in MSIE, we do not compare URIs */
ret = mg_check_digest_auth(
hm->method,
mg_mk_str_n(
hm->uri.p,
hm->uri.len + (hm->query_string.len ? hm->query_string.len + 1 : 0)),
mg_mk_str(username), mg_mk_str(cnonce), mg_mk_str(response),
mg_mk_str(qop), mg_mk_str(nc), mg_mk_str(nonce), mg_mk_str(auth_domain),
fp);
clean:
if (username != username_buf) MG_FREE(username);
if (cnonce != cnonce_buf) MG_FREE(cnonce);
if (response != response_buf) MG_FREE(response);
if (uri != uri_buf) MG_FREE(uri);
if (qop != qop_buf) MG_FREE(qop);
if (nc != nc_buf) MG_FREE(nc);
if (nonce != nonce_buf) MG_FREE(nonce);
return ret;
}
int mg_check_digest_auth(struct mg_str method, struct mg_str uri,
struct mg_str username, struct mg_str cnonce,
struct mg_str response, struct mg_str qop,
struct mg_str nc, struct mg_str nonce,
struct mg_str auth_domain, FILE *fp) {
char buf[128], f_user[sizeof(buf)], f_ha1[sizeof(buf)], f_domain[sizeof(buf)];
char exp_resp[33];
/*
* Read passwords file line by line. If should have htdigest format,
* i.e. each line should be a colon-separated sequence:
* USER_NAME:DOMAIN_NAME:HA1_HASH_OF_USER_DOMAIN_AND_PASSWORD
*/
while (fgets(buf, sizeof(buf), fp) != NULL) {
if (sscanf(buf, "%[^:]:%[^:]:%s", f_user, f_domain, f_ha1) == 3 &&
mg_vcmp(&username, f_user) == 0 &&
mg_vcmp(&auth_domain, f_domain) == 0) {
/* Username and domain matched, check the password */
mg_mkmd5resp(method.p, method.len, uri.p, uri.len, f_ha1, strlen(f_ha1),
nonce.p, nonce.len, nc.p, nc.len, cnonce.p, cnonce.len,
qop.p, qop.len, exp_resp);
LOG(LL_DEBUG, ("%.*s %s %.*s %s", (int) username.len, username.p,
f_domain, (int) response.len, response.p, exp_resp));
return mg_ncasecmp(response.p, exp_resp, strlen(exp_resp)) == 0;
}
}
/* None of the entries in the passwords file matched - return failure */
return 0;
}
int mg_http_is_authorized(struct http_message *hm, struct mg_str path,
const char *domain, const char *passwords_file,
int flags) {
char buf[MG_MAX_PATH];
const char *p;
FILE *fp;
int authorized = 1;
if (domain != NULL && passwords_file != NULL) {
if (flags & MG_AUTH_FLAG_IS_GLOBAL_PASS_FILE) {
fp = mg_fopen(passwords_file, "r");
} else if (flags & MG_AUTH_FLAG_IS_DIRECTORY) {
snprintf(buf, sizeof(buf), "%.*s%c%s", (int) path.len, path.p, DIRSEP,
passwords_file);
fp = mg_fopen(buf, "r");
} else {
p = strrchr(path.p, DIRSEP);
if (p == NULL) p = path.p;
snprintf(buf, sizeof(buf), "%.*s%c%s", (int) (p - path.p), path.p, DIRSEP,
passwords_file);
fp = mg_fopen(buf, "r");
}
if (fp != NULL) {
authorized = mg_http_check_digest_auth(hm, domain, fp);
fclose(fp);
} else if (!(flags & MG_AUTH_FLAG_ALLOW_MISSING_FILE)) {
authorized = 0;
}
}
LOG(LL_DEBUG, ("%.*s %s %x %d", (int) path.len, path.p,
passwords_file ? passwords_file : "", flags, authorized));
return authorized;
}
#else
int mg_http_is_authorized(struct http_message *hm, const struct mg_str path,
const char *domain, const char *passwords_file,
int flags) {
(void) hm;
(void) path;
(void) domain;
(void) passwords_file;
(void) flags;
return 1;
}
#endif
#if MG_ENABLE_DIRECTORY_LISTING
static void mg_escape(const char *src, char *dst, size_t dst_len) {
size_t n = 0;
while (*src != '\0' && n + 5 < dst_len) {
unsigned char ch = *(unsigned char *) src++;
if (ch == '<') {
n += snprintf(dst + n, dst_len - n, "%s", "<");
} else {
dst[n++] = ch;
}
}
dst[n] = '\0';
}
static void mg_print_dir_entry(struct mg_connection *nc, const char *file_name,
cs_stat_t *stp) {
char size[64], mod[64], path[MG_MAX_PATH];
int64_t fsize = stp->st_size;
int is_dir = S_ISDIR(stp->st_mode);
const char *slash = is_dir ? "/" : "";
struct mg_str href;
if (is_dir) {
snprintf(size, sizeof(size), "%s", "[DIRECTORY]");
} else {
/*
* We use (double) cast below because MSVC 6 compiler cannot
* convert unsigned __int64 to double.
*/
if (fsize < 1024) {
snprintf(size, sizeof(size), "%d", (int) fsize);
} else if (fsize < 0x100000) {
snprintf(size, sizeof(size), "%.1fk", (double) fsize / 1024.0);
} else if (fsize < 0x40000000) {
snprintf(size, sizeof(size), "%.1fM", (double) fsize / 1048576);
} else {
snprintf(size, sizeof(size), "%.1fG", (double) fsize / 1073741824);
}
}
strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&stp->st_mtime));
mg_escape(file_name, path, sizeof(path));
href = mg_url_encode(mg_mk_str(file_name));
mg_printf_http_chunk(nc,
"
| %s%s | "
"%s | %s |
",
href.p, slash, path, slash, mod, is_dir ? -1 : fsize,
size);
free((void *) href.p);
}
static void mg_scan_directory(struct mg_connection *nc, const char *dir,
const struct mg_serve_http_opts *opts,
void (*func)(struct mg_connection *, const char *,
cs_stat_t *)) {
char path[MG_MAX_PATH + 1];
cs_stat_t st;
struct dirent *dp;
DIR *dirp;
LOG(LL_DEBUG, ("%p [%s]", (void*)nc, dir));
if ((dirp = (opendir(dir))) != NULL) {
while ((dp = readdir(dirp)) != NULL) {
/* Do not show current dir and hidden files */
if (mg_is_file_hidden((const char *) dp->d_name, opts, 1)) {
continue;
}
snprintf(path, sizeof(path), "%s/%s", dir, dp->d_name);
if (mg_stat(path, &st) == 0) {
func(nc, (const char *) dp->d_name, &st);
}
}
closedir(dirp);
} else {
LOG(LL_DEBUG, ("%p opendir(%s) -> %d", (void*)nc, dir, mg_get_errno()));
}
}
static void mg_send_directory_listing(struct mg_connection *nc, const char *dir,
struct http_message *hm,
struct mg_serve_http_opts *opts) {
static const char *sort_js_code =
"";
mg_send_response_line(nc, 200, opts->extra_headers);
mg_printf(nc, "%s: %s\r\n%s: %s\r\n\r\n", "Transfer-Encoding", "chunked",
"Content-Type", "text/html; charset=utf-8");
mg_printf_http_chunk(
nc,
"Index of %.*s%s%s"
""
"Index of %.*s
"
"| Name | "
"Modified | "
"Size |
|---|
"
"
|
"
""
"",
(int) hm->uri.len, hm->uri.p, sort_js_code, sort_js_code2,
(int) hm->uri.len, hm->uri.p);
mg_scan_directory(nc, dir, opts, mg_print_dir_entry);
mg_printf_http_chunk(nc,
""
"
|
"
"
"
"%s"
"",
mg_version_header);
mg_send_http_chunk(nc, "", 0);
/* TODO(rojer): Remove when cesanta/dev/issues/197 is fixed. */
nc->flags |= MG_F_SEND_AND_CLOSE;
}
#endif /* MG_ENABLE_DIRECTORY_LISTING */
/*
* Given a directory path, find one of the files specified in the
* comma-separated list of index files `list`.
* First found index file wins. If an index file is found, then gets
* appended to the `path`, stat-ed, and result of `stat()` passed to `stp`.
* If index file is not found, then `path` and `stp` remain unchanged.
*/
MG_INTERNAL void mg_find_index_file(const char *path, const char *list,
char **index_file, cs_stat_t *stp) {
struct mg_str vec;
size_t path_len = strlen(path);
int found = 0;
*index_file = NULL;
/* Traverse index files list. For each entry, append it to the given */
/* path and see if the file exists. If it exists, break the loop */
while ((list = mg_next_comma_list_entry(list, &vec, NULL)) != NULL) {
cs_stat_t st;
size_t len = path_len + 1 + vec.len + 1;
*index_file = (char *) MG_REALLOC(*index_file, len);
if (*index_file == NULL) break;
snprintf(*index_file, len, "%s%c%.*s", path, DIRSEP, (int) vec.len, vec.p);
/* Does it exist? Is it a file? */
if (mg_stat(*index_file, &st) == 0 && S_ISREG(st.st_mode)) {
/* Yes it does, break the loop */
*stp = st;
found = 1;
break;
}
}
if (!found) {
MG_FREE(*index_file);
*index_file = NULL;
}
LOG(LL_DEBUG, ("[%s] [%s]", path, (*index_file ? *index_file : "")));
}
#if MG_ENABLE_HTTP_URL_REWRITES
static int mg_http_send_port_based_redirect(
struct mg_connection *c, struct http_message *hm,
const struct mg_serve_http_opts *opts) {
const char *rewrites = opts->url_rewrites;
struct mg_str a, b;
char local_port[20] = {'%'};
mg_conn_addr_to_str(c, local_port + 1, sizeof(local_port) - 1,
MG_SOCK_STRINGIFY_PORT);
while ((rewrites = mg_next_comma_list_entry(rewrites, &a, &b)) != NULL) {
if (mg_vcmp(&a, local_port) == 0) {
mg_send_response_line(c, 301, NULL);
mg_printf(c, "Content-Length: 0\r\nLocation: %.*s%.*s\r\n\r\n",
(int) b.len, b.p, (int) (hm->proto.p - hm->uri.p - 1),
hm->uri.p);
return 1;
}
}
return 0;
}
static void mg_reverse_proxy_handler(struct mg_connection *nc, int ev,
void *ev_data MG_UD_ARG(void *user_data)) {
struct http_message *hm = (struct http_message *) ev_data;
struct mg_http_proto_data *pd = mg_http_get_proto_data(nc);
if (pd == NULL || pd->reverse_proxy_data.linked_conn == NULL) {
DBG(("%p: upstream closed", (void*)nc));
return;
}
switch (ev) {
case MG_EV_CONNECT:
if (*(int *) ev_data != 0) {
mg_http_send_error(pd->reverse_proxy_data.linked_conn, 502, NULL);
}
break;
/* TODO(mkm): handle streaming */
case MG_EV_HTTP_REPLY:
mg_send(pd->reverse_proxy_data.linked_conn, hm->message.p,
hm->message.len);
pd->reverse_proxy_data.linked_conn->flags |= MG_F_SEND_AND_CLOSE;
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
break;
case MG_EV_CLOSE:
pd->reverse_proxy_data.linked_conn->flags |= MG_F_SEND_AND_CLOSE;
break;
}
#if MG_ENABLE_CALLBACK_USERDATA
(void) user_data;
#endif
}
void mg_http_reverse_proxy(struct mg_connection *nc,
const struct http_message *hm, struct mg_str mount,
struct mg_str upstream) {
struct mg_connection *be;
char burl[256], *purl = burl;
int i;
const char *error;
struct mg_connect_opts opts;
struct mg_str path = MG_NULL_STR, user_info = MG_NULL_STR, host = MG_NULL_STR;
memset(&opts, 0, sizeof(opts));
opts.error_string = &error;
mg_asprintf(&purl, sizeof(burl), "%.*s%.*s", (int) upstream.len, upstream.p,
(int) (hm->uri.len - mount.len), hm->uri.p + mount.len);
be = mg_connect_http_base(nc->mgr, MG_CB(mg_reverse_proxy_handler, NULL),
opts, "http", NULL, "https", NULL, purl, &path,
&user_info, &host);
LOG(LL_DEBUG, ("Proxying %.*s to %s (rule: %.*s)", (int) hm->uri.len,
hm->uri.p, purl, (int) mount.len, mount.p));
if (be == NULL) {
LOG(LL_ERROR, ("Error connecting to %s: %s", purl, error));
mg_http_send_error(nc, 502, NULL);
goto cleanup;
}
/* link connections to each other, they must live and die together */
mg_http_get_proto_data(be)->reverse_proxy_data.linked_conn = nc;
mg_http_get_proto_data(nc)->reverse_proxy_data.linked_conn = be;
/* send request upstream */
mg_printf(be, "%.*s %.*s HTTP/1.1\r\n", (int) hm->method.len, hm->method.p,
(int) path.len, path.p);
mg_printf(be, "Host: %.*s\r\n", (int) host.len, host.p);
for (i = 0; i < MG_MAX_HTTP_HEADERS && hm->header_names[i].len > 0; i++) {
struct mg_str hn = hm->header_names[i];
struct mg_str hv = hm->header_values[i];
/* we rewrite the host header */
if (mg_vcasecmp(&hn, "Host") == 0) continue;
/*
* Don't pass chunked transfer encoding to the client because hm->body is
* already dechunked when we arrive here.
*/
if (mg_vcasecmp(&hn, "Transfer-encoding") == 0 &&
mg_vcasecmp(&hv, "chunked") == 0) {
mg_printf(be, "Content-Length: %" SIZE_T_FMT "\r\n", hm->body.len);
continue;
}
/* We don't support proxying Expect: 100-continue. */
if (mg_vcasecmp(&hn, "Expect") == 0 &&
mg_vcasecmp(&hv, "100-continue") == 0) {
continue;
}
mg_printf(be, "%.*s: %.*s\r\n", (int) hn.len, hn.p, (int) hv.len, hv.p);
}
mg_send(be, "\r\n", 2);
mg_send(be, hm->body.p, hm->body.len);
cleanup:
if (purl != burl) MG_FREE(purl);
}
static int mg_http_handle_forwarding(struct mg_connection *nc,
struct http_message *hm,
const struct mg_serve_http_opts *opts) {
const char *rewrites = opts->url_rewrites;
struct mg_str a, b;
struct mg_str p1 = MG_MK_STR("http://"), p2 = MG_MK_STR("https://");
while ((rewrites = mg_next_comma_list_entry(rewrites, &a, &b)) != NULL) {
if (mg_strncmp(a, hm->uri, a.len) == 0) {
if (mg_strncmp(b, p1, p1.len) == 0 || mg_strncmp(b, p2, p2.len) == 0) {
mg_http_reverse_proxy(nc, hm, a, b);
return 1;
}
}
}
return 0;
}
#endif /* MG_ENABLE_FILESYSTEM */
MG_INTERNAL int mg_uri_to_local_path(struct http_message *hm,
const struct mg_serve_http_opts *opts,
char **local_path,
struct mg_str *remainder) {
int ok = 1;
const char *cp = hm->uri.p, *cp_end = hm->uri.p + hm->uri.len;
struct mg_str root = {NULL, 0};
const char *file_uri_start = cp;
*local_path = NULL;
remainder->p = NULL;
remainder->len = 0;
{ /* 1. Determine which root to use. */
#if MG_ENABLE_HTTP_URL_REWRITES
const char *rewrites = opts->url_rewrites;
#else
const char *rewrites = "";
#endif
struct mg_str *hh = mg_get_http_header(hm, "Host");
struct mg_str a, b;
/* Check rewrites first. */
while ((rewrites = mg_next_comma_list_entry(rewrites, &a, &b)) != NULL) {
if (a.len > 1 && a.p[0] == '@') {
/* Host rewrite. */
if (hh != NULL && hh->len == a.len - 1 &&
mg_ncasecmp(a.p + 1, hh->p, a.len - 1) == 0) {
root = b;
break;
}
} else {
/* Regular rewrite, URI=directory */
size_t match_len = mg_match_prefix_n(a, hm->uri);
if (match_len > 0) {
file_uri_start = hm->uri.p + match_len;
if (*file_uri_start == '/' || file_uri_start == cp_end) {
/* Match ended at component boundary, ok. */
} else if (*(file_uri_start - 1) == '/') {
/* Pattern ends with '/', backtrack. */
file_uri_start--;
} else {
/* No match: must fall on the component boundary. */
continue;
}
root = b;
break;
}
}
}
/* If no rewrite rules matched, use DAV or regular document root. */
if (root.p == NULL) {
#if MG_ENABLE_HTTP_WEBDAV
if (opts->dav_document_root != NULL && mg_is_dav_request(&hm->method)) {
root.p = opts->dav_document_root;
root.len = strlen(opts->dav_document_root);
} else
#endif
{
root.p = opts->document_root;
root.len = strlen(opts->document_root);
}
}
assert(root.p != NULL && root.len > 0);
}
{ /* 2. Find where in the canonical URI path the local path ends. */
const char *u = file_uri_start + 1;
char *lp = (char *) MG_MALLOC(root.len + hm->uri.len + 1);
char *lp_end = lp + root.len + hm->uri.len + 1;
char *p = lp, *ps;
int exists = 1;
if (lp == NULL) {
ok = 0;
goto out;
}
memcpy(p, root.p, root.len);
p += root.len;
if (*(p - 1) == DIRSEP) p--;
*p = '\0';
ps = p;
/* Chop off URI path components one by one and build local path. */
while (u <= cp_end) {
const char *next = u;
struct mg_str component;
if (exists) {
cs_stat_t st;
exists = (mg_stat(lp, &st) == 0);
if (exists && S_ISREG(st.st_mode)) {
/* We found the terminal, the rest of the URI (if any) is path_info.
*/
if (*(u - 1) == '/') u--;
break;
}
}
if (u >= cp_end) break;
parse_uri_component((const char **) &next, cp_end, "/", &component);
if (component.len > 0) {
int len;
memmove(p + 1, component.p, component.len);
len = mg_url_decode(p + 1, component.len, p + 1, lp_end - p - 1, 0);
if (len <= 0) {
ok = 0;
break;
}
component.p = p + 1;
component.len = len;
if (mg_vcmp(&component, ".") == 0) {
/* Yum. */
} else if (mg_vcmp(&component, "..") == 0) {
while (p > ps && *p != DIRSEP) p--;
*p = '\0';
} else {
size_t i;
#ifdef _WIN32
/* On Windows, make sure it's valid Unicode (no funny stuff). */
wchar_t buf[MG_MAX_PATH * 2];
if (to_wchar(component.p, buf, MG_MAX_PATH) == 0) {
DBG(("[%.*s] smells funny", (int) component.len, component.p));
ok = 0;
break;
}
#endif
*p++ = DIRSEP;
/* No NULs and DIRSEPs in the component (percent-encoded). */
for (i = 0; i < component.len; i++, p++) {
if (*p == '\0' ||
*p == DIRSEP
#ifdef _WIN32
/* On Windows, "/" is also accepted, so check for that too. */
|| *p == '/'
#endif
) {
ok = 0;
break;
}
}
}
}
u = next;
}
if (ok) {
*local_path = lp;
if (u > cp_end) u = cp_end;
remainder->p = u;
remainder->len = cp_end - u;
} else {
MG_FREE(lp);
}
}
out:
LOG(LL_DEBUG,
("'%.*s' -> '%s' + '%.*s'", (int) hm->uri.len, hm->uri.p,
*local_path ? *local_path : "", (int) remainder->len, remainder->p));
return ok;
}
static int mg_get_month_index(const char *s) {
static const char *month_names[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
size_t i;
for (i = 0; i < ARRAY_SIZE(month_names); i++)
if (!strcmp(s, month_names[i])) return (int) i;
return -1;
}
static int mg_num_leap_years(int year) {
return year / 4 - year / 100 + year / 400;
}
/* Parse UTC date-time string, and return the corresponding time_t value. */
MG_INTERNAL time_t mg_parse_date_string(const char *datetime) {
static const unsigned short days_before_month[] = {
0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
char month_str[32];
int second, minute, hour, day, month, year, leap_days, days;
time_t result = (time_t) 0;
if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d", &day, month_str, &year, &hour,
&minute, &second) == 6) ||
(sscanf(datetime, "%d %3s %d %d:%d:%d", &day, month_str, &year, &hour,
&minute, &second) == 6) ||
(sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d", &day, month_str, &year,
&hour, &minute, &second) == 6) ||
(sscanf(datetime, "%d-%3s-%d %d:%d:%d", &day, month_str, &year, &hour,
&minute, &second) == 6)) &&
year > 1970 && (month = mg_get_month_index(month_str)) != -1) {
leap_days = mg_num_leap_years(year) - mg_num_leap_years(1970);
year -= 1970;
days = year * 365 + days_before_month[month] + (day - 1) + leap_days;
result = days * 24 * 3600 + hour * 3600 + minute * 60 + second;
}
return result;
}
MG_INTERNAL int mg_is_not_modified(struct http_message *hm, cs_stat_t *st) {
struct mg_str *hdr;
if ((hdr = mg_get_http_header(hm, "If-None-Match")) != NULL) {
char etag[64];
mg_http_construct_etag(etag, sizeof(etag), st);
return mg_vcasecmp(hdr, etag) == 0;
} else if ((hdr = mg_get_http_header(hm, "If-Modified-Since")) != NULL) {
return st->st_mtime <= mg_parse_date_string(hdr->p);
} else {
return 0;
}
}
void mg_http_send_digest_auth_request(struct mg_connection *c,
const char *domain) {
mg_printf(c,
"HTTP/1.1 401 Unauthorized\r\n"
"WWW-Authenticate: Digest qop=\"auth\", "
"realm=\"%s\", nonce=\"%lx\"\r\n"
"Content-Length: 0\r\n\r\n",
domain, (unsigned long) mg_time());
}
static void mg_http_send_options(struct mg_connection *nc,
struct mg_serve_http_opts *opts) {
mg_send_response_line(nc, 200, opts->extra_headers);
mg_printf(nc, "%s",
"Allow: GET, POST, HEAD, CONNECT, OPTIONS"
#if MG_ENABLE_HTTP_WEBDAV
", MKCOL, PUT, DELETE, PROPFIND, MOVE\r\nDAV: 1,2"
#endif
"\r\n\r\n");
nc->flags |= MG_F_SEND_AND_CLOSE;
}
static int mg_is_creation_request(const struct http_message *hm) {
return mg_vcmp(&hm->method, "MKCOL") == 0 || mg_vcmp(&hm->method, "PUT") == 0;
}
MG_INTERNAL void mg_send_http_file(struct mg_connection *nc, char *path,
const struct mg_str *path_info,
struct http_message *hm,
struct mg_serve_http_opts *opts) {
int exists, is_directory, is_cgi;
#if MG_ENABLE_HTTP_WEBDAV
int is_dav = mg_is_dav_request(&hm->method);
#else
int is_dav = 0;
#endif
char *index_file = NULL;
cs_stat_t st;
exists = (mg_stat(path, &st) == 0);
is_directory = exists && S_ISDIR(st.st_mode);
if (is_directory)
mg_find_index_file(path, opts->index_files, &index_file, &st);
is_cgi =
(mg_match_prefix(opts->cgi_file_pattern, strlen(opts->cgi_file_pattern),
index_file ? index_file : path) > 0);
LOG(LL_DEBUG,
("%p %.*s [%s] exists=%d is_dir=%d is_dav=%d is_cgi=%d index=%s", (void*)nc,
(int) hm->method.len, hm->method.p, path, exists, is_directory, is_dav,
is_cgi, index_file ? index_file : ""));
if (is_directory && hm->uri.p[hm->uri.len - 1] != '/' && !is_dav) {
mg_printf(nc,
"HTTP/1.1 301 Moved\r\nLocation: %.*s/\r\n"
"Content-Length: 0\r\n\r\n",
(int) hm->uri.len, hm->uri.p);
MG_FREE(index_file);
return;
}
/* If we have path_info, the only way to handle it is CGI. */
if (path_info->len > 0 && !is_cgi) {
mg_http_send_error(nc, 501, NULL);
MG_FREE(index_file);
return;
}
if (is_dav && opts->dav_document_root == NULL) {
mg_http_send_error(nc, 501, NULL);
} else if (!mg_http_is_authorized(
hm, mg_mk_str(path), opts->auth_domain, opts->global_auth_file,
((is_directory ? MG_AUTH_FLAG_IS_DIRECTORY : 0) |
MG_AUTH_FLAG_IS_GLOBAL_PASS_FILE |
MG_AUTH_FLAG_ALLOW_MISSING_FILE)) ||
!mg_http_is_authorized(
hm, mg_mk_str(path), opts->auth_domain,
opts->per_directory_auth_file,
((is_directory ? MG_AUTH_FLAG_IS_DIRECTORY : 0) |
MG_AUTH_FLAG_ALLOW_MISSING_FILE))) {
mg_http_send_digest_auth_request(nc, opts->auth_domain);
} else if (is_cgi) {
#if MG_ENABLE_HTTP_CGI
mg_handle_cgi(nc, index_file ? index_file : path, path_info, hm, opts);
#else
mg_http_send_error(nc, 501, NULL);
#endif /* MG_ENABLE_HTTP_CGI */
} else if ((!exists ||
mg_is_file_hidden(path, opts, 0 /* specials are ok */)) &&
!mg_is_creation_request(hm)) {
mg_http_send_error(nc, 404, NULL);
#if MG_ENABLE_HTTP_WEBDAV
} else if (!mg_vcmp(&hm->method, "PROPFIND")) {
mg_handle_propfind(nc, path, &st, hm, opts);
#if !MG_DISABLE_DAV_AUTH
} else if (is_dav &&
(opts->dav_auth_file == NULL ||
(strcmp(opts->dav_auth_file, "-") != 0 &&
!mg_http_is_authorized(
hm, mg_mk_str(path), opts->auth_domain, opts->dav_auth_file,
((is_directory ? MG_AUTH_FLAG_IS_DIRECTORY : 0) |
MG_AUTH_FLAG_IS_GLOBAL_PASS_FILE |
MG_AUTH_FLAG_ALLOW_MISSING_FILE))))) {
mg_http_send_digest_auth_request(nc, opts->auth_domain);
#endif
} else if (!mg_vcmp(&hm->method, "MKCOL")) {
mg_handle_mkcol(nc, path, hm);
} else if (!mg_vcmp(&hm->method, "DELETE")) {
mg_handle_delete(nc, opts, path);
} else if (!mg_vcmp(&hm->method, "PUT")) {
mg_handle_put(nc, path, hm);
} else if (!mg_vcmp(&hm->method, "MOVE")) {
mg_handle_move(nc, opts, path, hm);
#if MG_ENABLE_FAKE_DAVLOCK
} else if (!mg_vcmp(&hm->method, "LOCK")) {
mg_handle_lock(nc, path);
#endif
#endif /* MG_ENABLE_HTTP_WEBDAV */
} else if (!mg_vcmp(&hm->method, "OPTIONS")) {
mg_http_send_options(nc, opts);
} else if (is_directory && index_file == NULL) {
#if MG_ENABLE_DIRECTORY_LISTING
if (strcmp(opts->enable_directory_listing, "yes") == 0) {
mg_send_directory_listing(nc, path, hm, opts);
} else {
mg_http_send_error(nc, 403, NULL);
}
#else
mg_http_send_error(nc, 501, NULL);
#endif
} else if (mg_is_not_modified(hm, &st)) {
/* Note: not using mg_http_send_error in order to keep connection alive */
/* Note: passing extra headers allow users to control session cookies */
mg_send_head(nc, 304, 0, opts->extra_headers);
} else {
mg_http_serve_file2(nc, index_file ? index_file : path, hm, opts);
}
MG_FREE(index_file);
}
void mg_serve_http(struct mg_connection *nc, struct http_message *hm,
struct mg_serve_http_opts opts) {
char *path = NULL;
struct mg_str *hdr, path_info;
uint32_t remote_ip = ntohl(*(uint32_t *) &nc->sa.sin.sin_addr);
if (mg_check_ip_acl(opts.ip_acl, remote_ip) != 1) {
/* Not allowed to connect */
mg_http_send_error(nc, 403, NULL);
nc->flags |= MG_F_SEND_AND_CLOSE;
return;
}
#if MG_ENABLE_HTTP_URL_REWRITES
if (mg_http_handle_forwarding(nc, hm, &opts)) {
return;
}
if (mg_http_send_port_based_redirect(nc, hm, &opts)) {
return;
}
#endif
if (opts.document_root == NULL) {
opts.document_root = ".";
}
if (opts.per_directory_auth_file == NULL) {
opts.per_directory_auth_file = ".htpasswd";
}
if (opts.enable_directory_listing == NULL) {
opts.enable_directory_listing = "yes";
}
if (opts.cgi_file_pattern == NULL) {
opts.cgi_file_pattern = "**.cgi$|**.php$";
}
if (opts.ssi_pattern == NULL) {
opts.ssi_pattern = "**.shtml$|**.shtm$";
}
if (opts.index_files == NULL) {
opts.index_files = "index.html,index.htm,index.shtml,index.cgi,index.php";
}
/* Normalize path - resolve "." and ".." (in-place). */
if (!mg_normalize_uri_path(&hm->uri, &hm->uri)) {
mg_http_send_error(nc, 400, NULL);
return;
}
if (mg_uri_to_local_path(hm, &opts, &path, &path_info) == 0) {
mg_http_send_error(nc, 404, NULL);
return;
}
mg_send_http_file(nc, path, &path_info, hm, &opts);
MG_FREE(path);
path = NULL;
/* Close connection for non-keep-alive requests */
if (mg_vcmp(&hm->proto, "HTTP/1.1") != 0 ||
((hdr = mg_get_http_header(hm, "Connection")) != NULL &&
mg_vcmp(hdr, "keep-alive") != 0)) {
#if 0
nc->flags |= MG_F_SEND_AND_CLOSE;
#endif
}
}
#if MG_ENABLE_HTTP_STREAMING_MULTIPART
void mg_file_upload_handler(struct mg_connection *nc, int ev, void *ev_data,
mg_fu_fname_fn local_name_fn
MG_UD_ARG(void *user_data)) {
switch (ev) {
case MG_EV_HTTP_PART_BEGIN: {
struct mg_http_multipart_part *mp =
(struct mg_http_multipart_part *) ev_data;
struct file_upload_state *fus;
struct mg_str lfn = local_name_fn(nc, mg_mk_str(mp->file_name));
mp->user_data = NULL;
if (lfn.p == NULL || lfn.len == 0) {
LOG(LL_ERROR, ("%p Not allowed to upload %s", (void*)nc, mp->file_name));
mg_printf(nc,
"HTTP/1.1 403 Not Allowed\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n"
"Not allowed to upload %s\r\n",
mp->file_name);
nc->flags |= MG_F_SEND_AND_CLOSE;
return;
}
fus = (struct file_upload_state *) MG_CALLOC(1, sizeof(*fus));
if (fus == NULL) {
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
return;
}
fus->lfn = (char *) MG_MALLOC(lfn.len + 1);
memcpy(fus->lfn, lfn.p, lfn.len);
fus->lfn[lfn.len] = '\0';
if (lfn.p != mp->file_name) MG_FREE((char *) lfn.p);
LOG(LL_DEBUG,
("%p Receiving file %s -> %s", (void*)nc, mp->file_name, fus->lfn));
fus->fp = mg_fopen(fus->lfn, "wb");
if (fus->fp == NULL) {
mg_printf(nc,
"HTTP/1.1 500 Internal Server Error\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n");
LOG(LL_ERROR, ("Failed to open %s: %d\n", fus->lfn, mg_get_errno()));
mg_printf(nc, "Failed to open %s: %d\n", fus->lfn, mg_get_errno());
/* Do not close the connection just yet, discard remainder of the data.
* This is because at the time of writing some browsers (Chrome) fail to
* render response before all the data is sent. */
}
mp->user_data = (void *) fus;
break;
}
case MG_EV_HTTP_PART_DATA: {
struct mg_http_multipart_part *mp =
(struct mg_http_multipart_part *) ev_data;
struct file_upload_state *fus =
(struct file_upload_state *) mp->user_data;
if (fus == NULL || fus->fp == NULL) break;
if (mg_fwrite(mp->data.p, 1, mp->data.len, fus->fp) != mp->data.len) {
LOG(LL_ERROR, ("Failed to write to %s: %d, wrote %d", fus->lfn,
mg_get_errno(), (int) fus->num_recd));
if (mg_get_errno() == ENOSPC
#ifdef SPIFFS_ERR_FULL
|| mg_get_errno() == SPIFFS_ERR_FULL
#endif
) {
mg_printf(nc,
"HTTP/1.1 413 Payload Too Large\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n");
mg_printf(nc, "Failed to write to %s: no space left; wrote %d\r\n",
fus->lfn, (int) fus->num_recd);
} else {
mg_printf(nc,
"HTTP/1.1 500 Internal Server Error\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n");
mg_printf(nc, "Failed to write to %s: %d, wrote %d", mp->file_name,
mg_get_errno(), (int) fus->num_recd);
}
fclose(fus->fp);
remove(fus->lfn);
fus->fp = NULL;
/* Do not close the connection just yet, discard remainder of the data.
* This is because at the time of writing some browsers (Chrome) fail to
* render response before all the data is sent. */
return;
}
fus->num_recd += mp->data.len;
LOG(LL_DEBUG, ("%p rec'd %d bytes, %d total", (void*)nc, (int) mp->data.len,
(int) fus->num_recd));
break;
}
case MG_EV_HTTP_PART_END: {
struct mg_http_multipart_part *mp =
(struct mg_http_multipart_part *) ev_data;
struct file_upload_state *fus =
(struct file_upload_state *) mp->user_data;
if (fus == NULL) break;
if (mp->status >= 0 && fus->fp != NULL) {
LOG(LL_DEBUG, ("%p Uploaded %s (%s), %d bytes", (void*)nc, mp->file_name,
fus->lfn, (int) fus->num_recd));
} else {
LOG(LL_ERROR, ("Failed to store %s (%s)", mp->file_name, fus->lfn));
/*
* mp->status < 0 means connection was terminated, so no reason to send
* HTTP reply
*/
}
if (fus->fp != NULL) fclose(fus->fp);
MG_FREE(fus->lfn);
MG_FREE(fus);
mp->user_data = NULL;
/* Don't close the connection yet, there may be more files to come. */
break;
}
case MG_EV_HTTP_MULTIPART_REQUEST_END: {
mg_printf(nc,
"HTTP/1.1 200 OK\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n\r\n"
"Ok.\r\n");
nc->flags |= MG_F_SEND_AND_CLOSE;
break;
}
}
#if MG_ENABLE_CALLBACK_USERDATA
(void) user_data;
#endif
}
#endif /* MG_ENABLE_HTTP_STREAMING_MULTIPART */
#endif /* MG_ENABLE_FILESYSTEM */
struct mg_connection *mg_connect_http_base(
struct mg_mgr *mgr, MG_CB(mg_event_handler_t ev_handler, void *user_data),
struct mg_connect_opts opts, const char *scheme1, const char *scheme2,
const char *scheme_ssl1, const char *scheme_ssl2, const char *url,
struct mg_str *path, struct mg_str *user_info, struct mg_str *host) {
struct mg_connection *nc = NULL;
unsigned int port_i = 0;
int use_ssl = 0;
struct mg_str scheme, query, fragment;
char conn_addr_buf[2];
char *conn_addr = conn_addr_buf;
if (mg_parse_uri(mg_mk_str(url), &scheme, user_info, host, &port_i, path,
&query, &fragment) != 0) {
MG_SET_PTRPTR(opts.error_string, "cannot parse url");
goto out;
}
/* If query is present, do not strip it. Pass to the caller. */
if (query.len > 0) path->len += query.len + 1;
if (scheme.len == 0 || mg_vcmp(&scheme, scheme1) == 0 ||
(scheme2 != NULL && mg_vcmp(&scheme, scheme2) == 0)) {
use_ssl = 0;
if (port_i == 0) port_i = 80;
} else if (mg_vcmp(&scheme, scheme_ssl1) == 0 ||
(scheme2 != NULL && mg_vcmp(&scheme, scheme_ssl2) == 0)) {
use_ssl = 1;
if (port_i == 0) port_i = 443;
} else {
goto out;
}
mg_asprintf(&conn_addr, sizeof(conn_addr_buf), "tcp://%.*s:%u",
(int) host->len, host->p, port_i);
if (conn_addr == NULL) goto out;
LOG(LL_DEBUG, ("%s use_ssl? %d %s", url, use_ssl, conn_addr));
if (use_ssl) {
#if MG_ENABLE_SSL
/*
* Schema requires SSL, but no SSL parameters were provided in opts.
* In order to maintain backward compatibility, use a faux-SSL with no
* verification.
*/
if (opts.ssl_ca_cert == NULL) {
opts.ssl_ca_cert = "*";
}
#else
MG_SET_PTRPTR(opts.error_string, "ssl is disabled");
goto out;
#endif
}
if ((nc = mg_connect_opt(mgr, conn_addr, MG_CB(ev_handler, user_data),
opts)) != NULL) {
mg_set_protocol_http_websocket(nc);
}
out:
if (conn_addr != NULL && conn_addr != conn_addr_buf) MG_FREE(conn_addr);
return nc;
}
struct mg_connection *mg_connect_http_opt(
struct mg_mgr *mgr, MG_CB(mg_event_handler_t ev_handler, void *user_data),
struct mg_connect_opts opts, const char *url, const char *extra_headers,
const char *post_data) {
struct mg_str user = MG_NULL_STR, null_str = MG_NULL_STR;
struct mg_str host = MG_NULL_STR, path = MG_NULL_STR;
struct mbuf auth;
struct mg_connection *nc =
mg_connect_http_base(mgr, MG_CB(ev_handler, user_data), opts, "http",
NULL, "https", NULL, url, &path, &user, &host);
if (nc == NULL) {
return NULL;
}
mbuf_init(&auth, 0);
if (user.len > 0) {
mg_basic_auth_header(user, null_str, &auth);
}
if (post_data == NULL) post_data = "";
if (extra_headers == NULL) extra_headers = "";
if (path.len == 0) path = mg_mk_str("/");
if (host.len == 0) host = mg_mk_str("");
mg_printf(nc,
"%s %.*s HTTP/1.1\r\nHost: %.*s\r\nContent-Length: %" SIZE_T_FMT
"\r\n%.*s%s\r\n%s",
(post_data[0] == '\0' ? "GET" : "POST"), (int) path.len, path.p,
(int) (path.p - host.p), host.p, strlen(post_data), (int) auth.len,
(auth.buf == NULL ? "" : auth.buf), extra_headers, post_data);
mbuf_free(&auth);
return nc;
}
struct mg_connection *mg_connect_http(
struct mg_mgr *mgr, MG_CB(mg_event_handler_t ev_handler, void *user_data),
const char *url, const char *extra_headers, const char *post_data) {
struct mg_connect_opts opts;
memset(&opts, 0, sizeof(opts));
return mg_connect_http_opt(mgr, MG_CB(ev_handler, user_data), opts, url,
extra_headers, post_data);
}
size_t mg_parse_multipart(const char *buf, size_t buf_len, char *var_name,
size_t var_name_len, char *file_name,
size_t file_name_len, const char **data,
size_t *data_len) {
static const char cd[] = "Content-Disposition: ";
size_t hl, bl, n, ll, pos, cdl = sizeof(cd) - 1;
int shl;
if (buf == NULL || buf_len <= 0) return 0;
if ((shl = mg_http_get_request_len(buf, buf_len)) <= 0) return 0;
hl = shl;
if (buf[0] != '-' || buf[1] != '-' || buf[2] == '\n') return 0;
/* Get boundary length */
bl = mg_get_line_len(buf, buf_len);
/* Loop through headers, fetch variable name and file name */
var_name[0] = file_name[0] = '\0';
for (n = bl; (ll = mg_get_line_len(buf + n, hl - n)) > 0; n += ll) {
if (mg_ncasecmp(cd, buf + n, cdl) == 0) {
struct mg_str header;
header.p = buf + n + cdl;
header.len = ll - (cdl + 2);
{
char *var_name2 = var_name;
mg_http_parse_header2(&header, "name", &var_name2, var_name_len);
/* TODO: handle reallocated buffer correctly */
if (var_name2 != var_name) {
MG_FREE(var_name2);
var_name[0] = '\0';
}
}
{
char *file_name2 = file_name;
mg_http_parse_header2(&header, "filename", &file_name2, file_name_len);
/* TODO: handle reallocated buffer correctly */
if (file_name2 != file_name) {
MG_FREE(file_name2);
file_name[0] = '\0';
}
}
}
}
/* Scan through the body, search for terminating boundary */
for (pos = hl; pos + (bl - 2) < buf_len; pos++) {
if (buf[pos] == '-' && !strncmp(buf, &buf[pos], bl - 2)) {
if (data_len != NULL) *data_len = (pos - 2) - hl;
if (data != NULL) *data = buf + hl;
return pos;
}
}
return 0;
}
void mg_register_http_endpoint_opt(struct mg_connection *nc,
const char *uri_path,
mg_event_handler_t handler,
struct mg_http_endpoint_opts opts) {
struct mg_http_proto_data *pd = NULL;
struct mg_http_endpoint *new_ep = NULL;
if (nc == NULL) return;
new_ep = (struct mg_http_endpoint *) MG_CALLOC(1, sizeof(*new_ep));
if (new_ep == NULL) return;
pd = mg_http_get_proto_data(nc);
if (pd == NULL) pd = mg_http_create_proto_data(nc);
new_ep->uri_pattern = mg_strdup(mg_mk_str(uri_path));
if (opts.auth_domain != NULL && opts.auth_file != NULL) {
new_ep->auth_domain = strdup(opts.auth_domain);
new_ep->auth_file = strdup(opts.auth_file);
}
new_ep->handler = handler;
#if MG_ENABLE_CALLBACK_USERDATA
new_ep->user_data = opts.user_data;
#endif
new_ep->next = pd->endpoints;
pd->endpoints = new_ep;
}
static void mg_http_call_endpoint_handler(struct mg_connection *nc, int ev,
struct http_message *hm) {
struct mg_http_proto_data *pd = mg_http_get_proto_data(nc);
void *user_data = nc->user_data;
if (ev == MG_EV_HTTP_REQUEST
#if MG_ENABLE_HTTP_STREAMING_MULTIPART
|| ev == MG_EV_HTTP_MULTIPART_REQUEST
#endif
) {
struct mg_http_endpoint *ep =
mg_http_get_endpoint_handler(nc->listener, &hm->uri);
if (ep != NULL) {
#if MG_ENABLE_FILESYSTEM && !MG_DISABLE_HTTP_DIGEST_AUTH
if (!mg_http_is_authorized(hm, hm->uri, ep->auth_domain, ep->auth_file,
MG_AUTH_FLAG_IS_GLOBAL_PASS_FILE)) {
mg_http_send_digest_auth_request(nc, ep->auth_domain);
return;
}
#endif
pd->endpoint_handler = ep->handler;
#if MG_ENABLE_CALLBACK_USERDATA
user_data = ep->user_data;
#endif
}
}
mg_call(nc, pd->endpoint_handler ? pd->endpoint_handler : nc->handler,
user_data, ev, hm);
}
void mg_register_http_endpoint(struct mg_connection *nc, const char *uri_path,
MG_CB(mg_event_handler_t handler,
void *user_data)) {
struct mg_http_endpoint_opts opts;
memset(&opts, 0, sizeof(opts));
#if MG_ENABLE_CALLBACK_USERDATA
opts.user_data = user_data;
#endif
mg_register_http_endpoint_opt(nc, uri_path, handler, opts);
}
#endif /* MG_ENABLE_HTTP */
#ifdef MG_MODULE_LINES
#line 1 "src/mg_http_cgi.c"
#endif
#ifndef _WIN32
#include
#endif
#if MG_ENABLE_HTTP && MG_ENABLE_HTTP_CGI
#ifndef MG_MAX_CGI_ENVIR_VARS
#define MG_MAX_CGI_ENVIR_VARS 64
#endif
#ifndef MG_ENV_EXPORT_TO_CGI
#define MG_ENV_EXPORT_TO_CGI "MONGOOSE_CGI"
#endif
#define MG_F_HTTP_CGI_PARSE_HEADERS MG_F_USER_1
/*
* This structure helps to create an environment for the spawned CGI program.
* Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings,
* last element must be NULL.
* However, on Windows there is a requirement that all these VARIABLE=VALUE\0
* strings must reside in a contiguous buffer. The end of the buffer is
* marked by two '\0' characters.
* We satisfy both worlds: we create an envp array (which is vars), all
* entries are actually pointers inside buf.
*/
struct mg_cgi_env_block {
struct mg_connection *nc;
char buf[MG_CGI_ENVIRONMENT_SIZE]; /* Environment buffer */
const char *vars[MG_MAX_CGI_ENVIR_VARS]; /* char *envp[] */
int len; /* Space taken */
int nvars; /* Number of variables in envp[] */
};
#ifdef _WIN32
struct mg_threadparam {
sock_t s;
HANDLE hPipe;
};
static int mg_wait_until_ready(sock_t sock, int for_read) {
fd_set set;
FD_ZERO(&set);
FD_SET(sock, &set);
return select(sock + 1, for_read ? &set : 0, for_read ? 0 : &set, 0, 0) == 1;
}
static void *mg_push_to_stdin(void *arg) {
struct mg_threadparam *tp = (struct mg_threadparam *) arg;
int n, sent, stop = 0;
DWORD k;
char buf[BUFSIZ];
while (!stop && mg_wait_until_ready(tp->s, 1) &&
(n = recv(tp->s, buf, sizeof(buf), 0)) > 0) {
if (n == -1 && GetLastError() == WSAEWOULDBLOCK) continue;
for (sent = 0; !stop && sent < n; sent += k) {
if (!WriteFile(tp->hPipe, buf + sent, n - sent, &k, 0)) stop = 1;
}
}
DBG(("%s", "FORWARED EVERYTHING TO CGI"));
CloseHandle(tp->hPipe);
MG_FREE(tp);
return NULL;
}
static void *mg_pull_from_stdout(void *arg) {
struct mg_threadparam *tp = (struct mg_threadparam *) arg;
int k = 0, stop = 0;
DWORD n, sent;
char buf[BUFSIZ];
while (!stop && ReadFile(tp->hPipe, buf, sizeof(buf), &n, NULL)) {
for (sent = 0; !stop && sent < n; sent += k) {
if (mg_wait_until_ready(tp->s, 0) &&
(k = send(tp->s, buf + sent, n - sent, 0)) <= 0)
stop = 1;
}
}
DBG(("%s", "EOF FROM CGI"));
CloseHandle(tp->hPipe);
shutdown(tp->s, 2); // Without this, IO thread may get truncated data
closesocket(tp->s);
MG_FREE(tp);
return NULL;
}
static void mg_spawn_stdio_thread(sock_t sock, HANDLE hPipe,
void *(*func)(void *)) {
struct mg_threadparam *tp = (struct mg_threadparam *) MG_MALLOC(sizeof(*tp));
if (tp != NULL) {
tp->s = sock;
tp->hPipe = hPipe;
mg_start_thread(func, tp);
}
}
static void mg_abs_path(const char *utf8_path, char *abs_path, size_t len) {
wchar_t buf[MG_MAX_PATH], buf2[MG_MAX_PATH];
to_wchar(utf8_path, buf, ARRAY_SIZE(buf));
GetFullPathNameW(buf, ARRAY_SIZE(buf2), buf2, NULL);
WideCharToMultiByte(CP_UTF8, 0, buf2, wcslen(buf2) + 1, abs_path, len, 0, 0);
}
static int mg_start_process(const char *interp, const char *cmd,
const char *env, const char *envp[],
const char *dir, sock_t sock) {
STARTUPINFOW si;
PROCESS_INFORMATION pi;
HANDLE a[2], b[2], me = GetCurrentProcess();
wchar_t wcmd[MG_MAX_PATH], full_dir[MG_MAX_PATH];
char buf[MG_MAX_PATH], buf2[MG_MAX_PATH], buf5[MG_MAX_PATH],
buf4[MG_MAX_PATH], cmdline[MG_MAX_PATH];
DWORD flags = DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS;
FILE *fp;
memset(&si, 0, sizeof(si));
memset(&pi, 0, sizeof(pi));
si.cb = sizeof(si);
si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
si.wShowWindow = SW_HIDE;
si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
CreatePipe(&a[0], &a[1], NULL, 0);
CreatePipe(&b[0], &b[1], NULL, 0);
DuplicateHandle(me, a[0], me, &si.hStdInput, 0, TRUE, flags);
DuplicateHandle(me, b[1], me, &si.hStdOutput, 0, TRUE, flags);
if (interp == NULL && (fp = mg_fopen(cmd, "r")) != NULL) {
buf[0] = buf[1] = '\0';
fgets(buf, sizeof(buf), fp);
buf[sizeof(buf) - 1] = '\0';
if (buf[0] == '#' && buf[1] == '!') {
interp = buf + 2;
/* Trim leading spaces: https://github.com/cesanta/mongoose/issues/489 */
while (*interp != '\0' && isspace(*(unsigned char *) interp)) {
interp++;
}
}
fclose(fp);
}
snprintf(buf, sizeof(buf), "%s/%s", dir, cmd);
mg_abs_path(buf, buf2, ARRAY_SIZE(buf2));
mg_abs_path(dir, buf5, ARRAY_SIZE(buf5));
to_wchar(dir, full_dir, ARRAY_SIZE(full_dir));
if (interp != NULL) {
mg_abs_path(interp, buf4, ARRAY_SIZE(buf4));
snprintf(cmdline, sizeof(cmdline), "%s \"%s\"", buf4, buf2);
} else {
snprintf(cmdline, sizeof(cmdline), "\"%s\"", buf2);
}
to_wchar(cmdline, wcmd, ARRAY_SIZE(wcmd));
if (CreateProcessW(NULL, wcmd, NULL, NULL, TRUE, CREATE_NEW_PROCESS_GROUP,
(void *) env, full_dir, &si, &pi) != 0) {
mg_spawn_stdio_thread(sock, a[1], mg_push_to_stdin);
mg_spawn_stdio_thread(sock, b[0], mg_pull_from_stdout);
CloseHandle(si.hStdOutput);
CloseHandle(si.hStdInput);
CloseHandle(pi.hThread);
CloseHandle(pi.hProcess);
} else {
CloseHandle(a[1]);
CloseHandle(b[0]);
closesocket(sock);
}
DBG(("CGI command: [%ls] -> %p", wcmd, (void*)pi.hProcess));
/* Not closing a[0] and b[1] because we've used DUPLICATE_CLOSE_SOURCE */
(void) envp;
return (pi.hProcess != NULL);
}
#else
static int mg_start_process(const char *interp, const char *cmd,
const char *env, const char *envp[],
const char *dir, sock_t sock) {
char buf[500];
pid_t pid = fork();
(void) env;
if (pid == 0) {
/*
* In Linux `chdir` declared with `warn_unused_result` attribute
* To shutup compiler we have yo use result in some way
*/
int tmp = chdir(dir);
(void) tmp;
(void) dup2(sock, 0);
(void) dup2(sock, 1);
closesocket(sock);
/*
* After exec, all signal handlers are restored to their default values,
* with one exception of SIGCHLD. According to POSIX.1-2001 and Linux's
* implementation, SIGCHLD's handler will leave unchanged after exec
* if it was set to be ignored. Restore it to default action.
*/
signal(SIGCHLD, SIG_DFL);
if (interp == NULL) {
execle(cmd, cmd, (char *) 0, envp); /* (char *) 0 to squash warning */
} else {
execle(interp, interp, cmd, (char *) 0, envp);
}
snprintf(buf, sizeof(buf),
"Status: 500\r\n\r\n"
"500 Server Error: %s%s%s: %s",
interp == NULL ? "" : interp, interp == NULL ? "" : " ", cmd,
strerror(errno));
send(1, buf, strlen(buf), 0);
_exit(EXIT_FAILURE); /* exec call failed */
}
return (pid != 0);
}
#endif /* _WIN32 */
/*
* Append VARIABLE=VALUE\0 string to the buffer, and add a respective
* pointer into the vars array.
*/
static char *mg_addenv(struct mg_cgi_env_block *block, const char *fmt, ...) {
int n, space;
char *added = block->buf + block->len;
va_list ap;
/* Calculate how much space is left in the buffer */
space = sizeof(block->buf) - (block->len + 2);
if (space > 0) {
/* Copy VARIABLE=VALUE\0 string into the free space */
va_start(ap, fmt);
n = vsnprintf(added, (size_t) space, fmt, ap);
va_end(ap);
/* Make sure we do not overflow buffer and the envp array */
if (n > 0 && n + 1 < space &&
block->nvars < (int) ARRAY_SIZE(block->vars) - 2) {
/* Append a pointer to the added string into the envp array */
block->vars[block->nvars++] = added;
/* Bump up used length counter. Include \0 terminator */
block->len += n + 1;
}
}
return added;
}
static void mg_addenv2(struct mg_cgi_env_block *blk, const char *name) {
const char *s;
if ((s = getenv(name)) != NULL) mg_addenv(blk, "%s=%s", name, s);
}
static void mg_prepare_cgi_environment(struct mg_connection *nc,
const char *prog,
const struct mg_str *path_info,
const struct http_message *hm,
const struct mg_serve_http_opts *opts,
struct mg_cgi_env_block *blk) {
const char *s;
struct mg_str *h;
char *p;
size_t i;
char buf[100];
size_t path_info_len = path_info != NULL ? path_info->len : 0;
blk->len = blk->nvars = 0;
blk->nc = nc;
if ((s = getenv("SERVER_NAME")) != NULL) {
mg_addenv(blk, "SERVER_NAME=%s", s);
} else {
mg_sock_to_str(nc->sock, buf, sizeof(buf), 3);
mg_addenv(blk, "SERVER_NAME=%s", buf);
}
mg_addenv(blk, "SERVER_ROOT=%s", opts->document_root);
mg_addenv(blk, "DOCUMENT_ROOT=%s", opts->document_root);
mg_addenv(blk, "SERVER_SOFTWARE=%s/%s", "Mongoose", MG_VERSION);
/* Prepare the environment block */
mg_addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1");
mg_addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1");
mg_addenv(blk, "%s", "REDIRECT_STATUS=200"); /* For PHP */
mg_addenv(blk, "REQUEST_METHOD=%.*s", (int) hm->method.len, hm->method.p);
mg_addenv(blk, "REQUEST_URI=%.*s%s%.*s", (int) hm->uri.len, hm->uri.p,
hm->query_string.len == 0 ? "" : "?", (int) hm->query_string.len,
hm->query_string.p);
mg_conn_addr_to_str(nc, buf, sizeof(buf),
MG_SOCK_STRINGIFY_REMOTE | MG_SOCK_STRINGIFY_IP);
mg_addenv(blk, "REMOTE_ADDR=%s", buf);
mg_conn_addr_to_str(nc, buf, sizeof(buf), MG_SOCK_STRINGIFY_PORT);
mg_addenv(blk, "SERVER_PORT=%s", buf);
s = hm->uri.p + hm->uri.len - path_info_len - 1;
if (*s == '/') {
const char *base_name = strrchr(prog, DIRSEP);
mg_addenv(blk, "SCRIPT_NAME=%.*s/%s", (int) (s - hm->uri.p), hm->uri.p,
(base_name != NULL ? base_name + 1 : prog));
} else {
mg_addenv(blk, "SCRIPT_NAME=%.*s", (int) (s - hm->uri.p + 1), hm->uri.p);
}
mg_addenv(blk, "SCRIPT_FILENAME=%s", prog);
if (path_info != NULL && path_info->len > 0) {
mg_addenv(blk, "PATH_INFO=%.*s", (int) path_info->len, path_info->p);
/* Not really translated... */
mg_addenv(blk, "PATH_TRANSLATED=%.*s", (int) path_info->len, path_info->p);
}
#if MG_ENABLE_SSL
mg_addenv(blk, "HTTPS=%s", (nc->flags & MG_F_SSL ? "on" : "off"));
#else
mg_addenv(blk, "HTTPS=off");
#endif
if ((h = mg_get_http_header((struct http_message *) hm, "Content-Type")) !=
NULL) {
mg_addenv(blk, "CONTENT_TYPE=%.*s", (int) h->len, h->p);
}
if (hm->query_string.len > 0) {
mg_addenv(blk, "QUERY_STRING=%.*s", (int) hm->query_string.len,
hm->query_string.p);
}
if ((h = mg_get_http_header((struct http_message *) hm, "Content-Length")) !=
NULL) {
mg_addenv(blk, "CONTENT_LENGTH=%.*s", (int) h->len, h->p);
}
mg_addenv2(blk, "PATH");
mg_addenv2(blk, "TMP");
mg_addenv2(blk, "TEMP");
mg_addenv2(blk, "TMPDIR");
mg_addenv2(blk, "PERLLIB");
mg_addenv2(blk, MG_ENV_EXPORT_TO_CGI);
#ifdef _WIN32
mg_addenv2(blk, "COMSPEC");
mg_addenv2(blk, "SYSTEMROOT");
mg_addenv2(blk, "SystemDrive");
mg_addenv2(blk, "ProgramFiles");
mg_addenv2(blk, "ProgramFiles(x86)");
mg_addenv2(blk, "CommonProgramFiles(x86)");
#else
mg_addenv2(blk, "LD_LIBRARY_PATH");
#endif /* _WIN32 */
/* Add all headers as HTTP_* variables */
for (i = 0; hm->header_names[i].len > 0; i++) {
p = mg_addenv(blk, "HTTP_%.*s=%.*s", (int) hm->header_names[i].len,
hm->header_names[i].p, (int) hm->header_values[i].len,
hm->header_values[i].p);
/* Convert variable name into uppercase, and change - to _ */
for (; *p != '=' && *p != '\0'; p++) {
if (*p == '-') *p = '_';
*p = (char) toupper(*(unsigned char *) p);
}
}
blk->vars[blk->nvars++] = NULL;
blk->buf[blk->len++] = '\0';
}
static void mg_cgi_ev_handler(struct mg_connection *cgi_nc, int ev,
void *ev_data MG_UD_ARG(void *user_data)) {
#if !MG_ENABLE_CALLBACK_USERDATA
void *user_data = cgi_nc->user_data;
#endif
struct mg_connection *nc = (struct mg_connection *) user_data;
(void) ev_data;
if (nc == NULL) {
/* The corresponding network connection was closed. */
cgi_nc->flags |= MG_F_CLOSE_IMMEDIATELY;
return;
}
switch (ev) {
case MG_EV_RECV:
/*
* CGI script does not output reply line, like "HTTP/1.1 CODE XXXXX\n"
* It outputs headers, then body. Headers might include "Status"
* header, which changes CODE, and it might include "Location" header
* which changes CODE to 302.
*
* Therefore we do not send the output from the CGI script to the user
* until all CGI headers are received.
*
* Here we parse the output from the CGI script, and if all headers has
* been received, send appropriate reply line, and forward all
* received headers to the client.
*/
if (nc->flags & MG_F_HTTP_CGI_PARSE_HEADERS) {
struct mbuf *io = &cgi_nc->recv_mbuf;
int len = mg_http_get_request_len(io->buf, io->len);
if (len == 0) break;
if (len < 0 || io->len > MG_MAX_HTTP_REQUEST_SIZE) {
cgi_nc->flags |= MG_F_CLOSE_IMMEDIATELY;
mg_http_send_error(nc, 500, "Bad headers");
} else {
struct http_message hm;
struct mg_str *h;
mg_http_parse_headers(io->buf, io->buf + io->len, io->len, &hm);
if (mg_get_http_header(&hm, "Location") != NULL) {
mg_printf(nc, "%s", "HTTP/1.1 302 Moved\r\n");
} else if ((h = mg_get_http_header(&hm, "Status")) != NULL) {
mg_printf(nc, "HTTP/1.1 %.*s\r\n", (int) h->len, h->p);
} else {
mg_printf(nc, "%s", "HTTP/1.1 200 OK\r\n");
}
}
nc->flags &= ~MG_F_HTTP_CGI_PARSE_HEADERS;
}
if (!(nc->flags & MG_F_HTTP_CGI_PARSE_HEADERS)) {
mg_forward(cgi_nc, nc);
}
break;
case MG_EV_CLOSE:
DBG(("%p CLOSE", (void*)cgi_nc));
mg_http_free_proto_data_cgi(&mg_http_get_proto_data(nc)->cgi);
nc->flags |= MG_F_SEND_AND_CLOSE;
break;
}
}
MG_INTERNAL void mg_handle_cgi(struct mg_connection *nc, const char *prog,
const struct mg_str *path_info,
const struct http_message *hm,
const struct mg_serve_http_opts *opts) {
struct mg_cgi_env_block blk;
char dir[MG_MAX_PATH];
const char *p;
sock_t fds[2];
DBG(("%p [%s]", (void*)nc, prog));
mg_prepare_cgi_environment(nc, prog, path_info, hm, opts, &blk);
/*
* CGI must be executed in its own directory. 'dir' must point to the
* directory containing executable program, 'p' must point to the
* executable program name relative to 'dir'.
*/
if ((p = strrchr(prog, DIRSEP)) == NULL) {
snprintf(dir, sizeof(dir), "%s", ".");
} else {
snprintf(dir, sizeof(dir), "%.*s", (int) (p - prog), prog);
prog = p + 1;
}
if (!mg_socketpair(fds, SOCK_STREAM)) {
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
return;
}
#ifndef _WIN32
struct sigaction sa;
sigemptyset(&sa.sa_mask);
sa.sa_handler = SIG_IGN;
sa.sa_flags = 0;
sigaction(SIGCHLD, &sa, NULL);
#endif
if (mg_start_process(opts->cgi_interpreter, prog, blk.buf, blk.vars, dir,
fds[1]) != 0) {
struct mg_connection *cgi_nc =
mg_add_sock(nc->mgr, fds[0], mg_cgi_ev_handler MG_UD_ARG(nc));
struct mg_http_proto_data *cgi_pd = mg_http_get_proto_data(nc);
cgi_pd->cgi.cgi_nc = cgi_nc;
#if !MG_ENABLE_CALLBACK_USERDATA
cgi_pd->cgi.cgi_nc->user_data = nc;
#endif
nc->flags |= MG_F_HTTP_CGI_PARSE_HEADERS;
/* Push POST data to the CGI */
if (hm->body.len > 0) {
mg_send(cgi_pd->cgi.cgi_nc, hm->body.p, hm->body.len);
}
mbuf_remove(&nc->recv_mbuf, nc->recv_mbuf.len);
} else {
closesocket(fds[0]);
mg_http_send_error(nc, 500, "CGI failure");
}
#ifndef _WIN32
closesocket(fds[1]); /* On Windows, CGI stdio thread closes that socket */
#endif
}
MG_INTERNAL void mg_http_free_proto_data_cgi(struct mg_http_proto_data_cgi *d) {
if (d == NULL) return;
if (d->cgi_nc != NULL) {
d->cgi_nc->flags |= MG_F_CLOSE_IMMEDIATELY;
d->cgi_nc->user_data = NULL;
}
memset(d, 0, sizeof(*d));
}
#endif /* MG_ENABLE_HTTP && MG_ENABLE_HTTP_CGI */
#ifdef MG_MODULE_LINES
#line 1 "src/mg_http_ssi.c"
#endif
#if MG_ENABLE_HTTP && MG_ENABLE_HTTP_SSI && MG_ENABLE_FILESYSTEM
static void mg_send_ssi_file(struct mg_connection *nc, struct http_message *hm,
const char *path, FILE *fp, int include_level,
const struct mg_serve_http_opts *opts);
static void mg_send_file_data(struct mg_connection *nc, FILE *fp) {
char buf[BUFSIZ];
size_t n;
while ((n = mg_fread(buf, 1, sizeof(buf), fp)) > 0) {
mg_send(nc, buf, n);
}
}
static void mg_do_ssi_include(struct mg_connection *nc, struct http_message *hm,
const char *ssi, char *tag, int include_level,
const struct mg_serve_http_opts *opts) {
char file_name[MG_MAX_PATH], path[MG_MAX_PATH], *p;
FILE *fp;
/*
* sscanf() is safe here, since send_ssi_file() also uses buffer
* of size MG_BUF_LEN to get the tag. So strlen(tag) is always < MG_BUF_LEN.
*/
if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
/* File name is relative to the webserver root */
if (snprintf(path, sizeof(path), "%s/%s", opts->document_root, file_name) < 0) {
return;
}
} else if (sscanf(tag, " abspath=\"%[^\"]\"", file_name) == 1) {
/*
* File name is relative to the webserver working directory
* or it is absolute system path
*/
if (snprintf(path, sizeof(path), "%s", file_name) < 0) return;
} else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1 ||
sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
/* File name is relative to the currect document */
snprintf(path, sizeof(path), "%s", ssi);
if ((p = strrchr(path, DIRSEP)) != NULL) {
p[1] = '\0';
}
snprintf(path + strlen(path), sizeof(path) - strlen(path), "%s", file_name);
} else {
mg_printf(nc, "Bad SSI #include: [%s]", tag);
return;
}
if ((fp = mg_fopen(path, "rb")) == NULL) {
mg_printf(nc, "SSI include error: mg_fopen(%s): %s", path,
strerror(mg_get_errno()));
} else {
mg_set_close_on_exec((sock_t) fileno(fp));
if (mg_match_prefix(opts->ssi_pattern, strlen(opts->ssi_pattern), path) >
0) {
mg_send_ssi_file(nc, hm, path, fp, include_level + 1, opts);
} else {
mg_send_file_data(nc, fp);
}
fclose(fp);
}
}
#if MG_ENABLE_HTTP_SSI_EXEC
static void do_ssi_exec(struct mg_connection *nc, char *tag) {
char cmd[BUFSIZ];
FILE *fp;
if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) {
mg_printf(nc, "Bad SSI #exec: [%s]", tag);
} else if ((fp = popen(cmd, "r")) == NULL) {
mg_printf(nc, "Cannot SSI #exec: [%s]: %s", cmd, strerror(mg_get_errno()));
} else {
mg_send_file_data(nc, fp);
pclose(fp);
}
}
#endif /* MG_ENABLE_HTTP_SSI_EXEC */
/*
* SSI directive has the following format:
*
*/
static void mg_send_ssi_file(struct mg_connection *nc, struct http_message *hm,
const char *path, FILE *fp, int include_level,
const struct mg_serve_http_opts *opts) {
static const struct mg_str btag = MG_MK_STR(" */
buf[i--] = '\0';
while (i > 0 && buf[i] == ' ') {
buf[i--] = '\0';
}
/* Handle known SSI directives */
if (strncmp(p, d_include.p, d_include.len) == 0) {
mg_do_ssi_include(nc, hm, path, p + d_include.len + 1, include_level,
opts);
} else if (strncmp(p, d_call.p, d_call.len) == 0) {
struct mg_ssi_call_ctx cctx;
memset(&cctx, 0, sizeof(cctx));
cctx.req = hm;
cctx.file = mg_mk_str(path);
cctx.arg = mg_mk_str(p + d_call.len + 1);
mg_call(nc, NULL, nc->user_data, MG_EV_SSI_CALL,
(void *) cctx.arg.p); /* NUL added above */
mg_call(nc, NULL, nc->user_data, MG_EV_SSI_CALL_CTX, &cctx);
#if MG_ENABLE_HTTP_SSI_EXEC
} else if (strncmp(p, d_exec.p, d_exec.len) == 0) {
do_ssi_exec(nc, p + d_exec.len + 1);
#endif
} else {
/* Silently ignore unknown SSI directive. */
}
len = 0;
} else if (ch == '<') {
in_ssi_tag = 1;
if (len > 0) {
mg_send(nc, buf, (size_t) len);
}
len = 0;
buf[len++] = ch & 0xff;
} else if (in_ssi_tag) {
if (len == (int) btag.len && strncmp(buf, btag.p, btag.len) != 0) {
/* Not an SSI tag */
in_ssi_tag = 0;
} else if (len == (int) sizeof(buf) - 2) {
mg_printf(nc, "%s: SSI tag is too large", path);
len = 0;
}
buf[len++] = ch & 0xff;
} else {
buf[len++] = ch & 0xff;
if (len == (int) sizeof(buf)) {
mg_send(nc, buf, (size_t) len);
len = 0;
}
}
}
/* Send the rest of buffered data */
if (len > 0) {
mg_send(nc, buf, (size_t) len);
}
}
MG_INTERNAL void mg_handle_ssi_request(struct mg_connection *nc,
struct http_message *hm,
const char *path,
const struct mg_serve_http_opts *opts) {
FILE *fp;
struct mg_str mime_type = MG_NULL_STR, encoding = MG_NULL_STR;
DBG(("%p %s", (void*)nc, path));
if ((fp = mg_fopen(path, "rb")) == NULL) {
mg_http_send_error(nc, 404, NULL);
} else {
mg_set_close_on_exec((sock_t) fileno(fp));
if (!mg_get_mime_type_encoding(mg_mk_str(path), &mime_type, &encoding,
opts)) {
mime_type = mg_mk_str("text/plain");
}
mg_send_response_line(nc, 200, opts->extra_headers);
mg_printf(nc,
"Content-Type: %.*s\r\n"
"Connection: close\r\n",
(int) mime_type.len, mime_type.p);
if (encoding.len > 0) {
mg_printf(nc, "Content-Encoding: %.*s\r\n", (int) encoding.len,
encoding.p);
}
mg_send(nc, "\r\n", 2);
mg_send_ssi_file(nc, hm, path, fp, 0, opts);
fclose(fp);
nc->flags |= MG_F_SEND_AND_CLOSE;
}
}
#endif /* MG_ENABLE_HTTP_SSI && MG_ENABLE_HTTP && MG_ENABLE_FILESYSTEM */
#ifdef MG_MODULE_LINES
#line 1 "src/mg_http_webdav.c"
#endif
#if MG_ENABLE_HTTP && MG_ENABLE_HTTP_WEBDAV
MG_INTERNAL int mg_is_dav_request(const struct mg_str *s) {
static const char *methods[] = {
"PUT",
"DELETE",
"MKCOL",
"PROPFIND",
"MOVE"
#if MG_ENABLE_FAKE_DAVLOCK
,
"LOCK",
"UNLOCK"
#endif
};
size_t i;
for (i = 0; i < ARRAY_SIZE(methods); i++) {
if (mg_vcmp(s, methods[i]) == 0) {
return 1;
}
}
return 0;
}
static int mg_mkdir(const char *path, uint32_t mode) {
#ifndef _WIN32
return mkdir(path, mode);
#else
(void) mode;
return _mkdir(path);
#endif
}
static void mg_print_props(struct mg_connection *nc, const char *name,
cs_stat_t *stp) {
char mtime[64];
time_t t = stp->st_mtime; /* store in local variable for NDK compile */
struct mg_str name_esc = mg_url_encode(mg_mk_str(name));
mg_gmt_time_string(mtime, sizeof(mtime), &t);
mg_printf(nc,
""
"%s"
""
""
"%s"
"%" INT64_FMT
""
"%s"
""
"HTTP/1.1 200 OK"
""
"\n",
name_esc.p, S_ISDIR(stp->st_mode) ? "" : "",
(int64_t) stp->st_size, mtime);
free((void *) name_esc.p);
}
MG_INTERNAL void mg_handle_propfind(struct mg_connection *nc, const char *path,
cs_stat_t *stp, struct http_message *hm,
struct mg_serve_http_opts *opts) {
static const char header[] =
"HTTP/1.1 207 Multi-Status\r\n"
"Connection: close\r\n"
"Content-Type: text/xml; charset=utf-8\r\n\r\n"
""
"\n";
static const char footer[] = "\n";
const struct mg_str *depth = mg_get_http_header(hm, "Depth");
/* Print properties for the requested resource itself */
if (S_ISDIR(stp->st_mode) &&
strcmp(opts->enable_directory_listing, "yes") != 0) {
mg_printf(nc, "%s", "HTTP/1.1 403 Directory Listing Denied\r\n\r\n");
} else {
char uri[MG_MAX_PATH];
mg_send(nc, header, sizeof(header) - 1);
snprintf(uri, sizeof(uri), "%.*s", (int) hm->uri.len, hm->uri.p);
mg_print_props(nc, uri, stp);
if (S_ISDIR(stp->st_mode) && (depth == NULL || mg_vcmp(depth, "0") != 0)) {
mg_scan_directory(nc, path, opts, mg_print_props);
}
mg_send(nc, footer, sizeof(footer) - 1);
nc->flags |= MG_F_SEND_AND_CLOSE;
}
}
#if MG_ENABLE_FAKE_DAVLOCK
/*
* Windows explorer (probably there are another WebDav clients like it)
* requires LOCK support in webdav. W/out this, it still works, but fails
* to save file: shows error message and offers "Save As".
* "Save as" works, but this message is very annoying.
* This is fake lock, which doesn't lock something, just returns LOCK token,
* UNLOCK always answers "OK".
* With this fake LOCK Windows Explorer looks happy and saves file.
* NOTE: that is not DAV LOCK imlementation, it is just a way to shut up
* Windows native DAV client. This is why FAKE LOCK is not enabed by default
*/
MG_INTERNAL void mg_handle_lock(struct mg_connection *nc, const char *path) {
static const char *reply =
"HTTP/1.1 207 Multi-Status\r\n"
"Connection: close\r\n"
"Content-Type: text/xml; charset=utf-8\r\n\r\n"
""
"\n"
"\n"
"\n"
"\n"
"\n"
"opaquelocktoken:%s%u"
""
""
"\n"
""
"\n";
mg_printf(nc, reply, path, (unsigned int) mg_time());
nc->flags |= MG_F_SEND_AND_CLOSE;
}
#endif
MG_INTERNAL void mg_handle_mkcol(struct mg_connection *nc, const char *path,
struct http_message *hm) {
int status_code = 500;
if (hm->body.len != (size_t) ~0 && hm->body.len > 0) {
status_code = 415;
} else if (!mg_mkdir(path, 0755)) {
status_code = 201;
} else if (errno == EEXIST) {
status_code = 405;
} else if (errno == EACCES) {
status_code = 403;
} else if (errno == ENOENT) {
status_code = 409;
} else {
status_code = 500;
}
mg_http_send_error(nc, status_code, NULL);
}
static int mg_remove_directory(const struct mg_serve_http_opts *opts,
const char *dir) {
char path[MG_MAX_PATH];
struct dirent *dp;
cs_stat_t st;
DIR *dirp;
if ((dirp = opendir(dir)) == NULL) return 0;
while ((dp = readdir(dirp)) != NULL) {
if (mg_is_file_hidden((const char *) dp->d_name, opts, 1)) {
continue;
}
snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
mg_stat(path, &st);
if (S_ISDIR(st.st_mode)) {
mg_remove_directory(opts, path);
} else {
remove(path);
}
}
closedir(dirp);
rmdir(dir);
return 1;
}
MG_INTERNAL void mg_handle_move(struct mg_connection *c,
const struct mg_serve_http_opts *opts,
const char *path, struct http_message *hm) {
const struct mg_str *dest = mg_get_http_header(hm, "Destination");
if (dest == NULL) {
mg_http_send_error(c, 411, NULL);
} else {
const char *p = (char *) memchr(dest->p, '/', dest->len);
if (p != NULL && p[1] == '/' &&
(p = (char *) memchr(p + 2, '/', dest->p + dest->len - p)) != NULL) {
char buf[MG_MAX_PATH];
snprintf(buf, sizeof(buf), "%s%.*s", opts->dav_document_root,
(int) (dest->p + dest->len - p), p);
if (rename(path, buf) == 0) {
mg_http_send_error(c, 200, NULL);
} else {
mg_http_send_error(c, 418, NULL);
}
} else {
mg_http_send_error(c, 500, NULL);
}
}
}
MG_INTERNAL void mg_handle_delete(struct mg_connection *nc,
const struct mg_serve_http_opts *opts,
const char *path) {
cs_stat_t st;
if (mg_stat(path, &st) != 0) {
mg_http_send_error(nc, 404, NULL);
} else if (S_ISDIR(st.st_mode)) {
mg_remove_directory(opts, path);
mg_http_send_error(nc, 204, NULL);
} else if (remove(path) == 0) {
mg_http_send_error(nc, 204, NULL);
} else {
mg_http_send_error(nc, 423, NULL);
}
}
/* Return -1 on error, 1 on success. */
static int mg_create_itermediate_directories(const char *path) {
const char *s;
/* Create intermediate directories if they do not exist */
for (s = path + 1; *s != '\0'; s++) {
if (*s == '/') {
char buf[MG_MAX_PATH];
cs_stat_t st;
snprintf(buf, sizeof(buf), "%.*s", (int) (s - path), path);
buf[sizeof(buf) - 1] = '\0';
if (mg_stat(buf, &st) != 0 && mg_mkdir(buf, 0755) != 0) {
return -1;
}
}
}
return 1;
}
MG_INTERNAL void mg_handle_put(struct mg_connection *nc, const char *path,
struct http_message *hm) {
struct mg_http_proto_data *pd = mg_http_get_proto_data(nc);
cs_stat_t st;
const struct mg_str *cl_hdr = mg_get_http_header(hm, "Content-Length");
int rc, status_code = mg_stat(path, &st) == 0 ? 200 : 201;
mg_http_free_proto_data_file(&pd->file);
if ((rc = mg_create_itermediate_directories(path)) == 0) {
mg_printf(nc, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n", status_code);
} else if (rc == -1) {
mg_http_send_error(nc, 500, NULL);
} else if (cl_hdr == NULL) {
mg_http_send_error(nc, 411, NULL);
} else if ((pd->file.fp = mg_fopen(path, "w+b")) == NULL) {
mg_http_send_error(nc, 500, NULL);
} else {
const struct mg_str *range_hdr = mg_get_http_header(hm, "Content-Range");
int64_t r1 = 0, r2 = 0;
pd->file.type = DATA_PUT;
mg_set_close_on_exec((sock_t) fileno(pd->file.fp));
pd->file.cl = to64(cl_hdr->p);
if (range_hdr != NULL &&
mg_http_parse_range_header(range_hdr, &r1, &r2) > 0) {
status_code = 206;
fseeko(pd->file.fp, r1, SEEK_SET);
pd->file.cl = r2 > r1 ? r2 - r1 + 1 : pd->file.cl - r1;
}
mg_printf(nc, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n", status_code);
/* Remove HTTP request from the mbuf, leave only payload */
mbuf_remove(&nc->recv_mbuf, hm->message.len - hm->body.len);
mg_http_transfer_file_data(nc);
}
}
#endif /* MG_ENABLE_HTTP && MG_ENABLE_HTTP_WEBDAV */
#ifdef MG_MODULE_LINES
#line 1 "src/mg_http_websocket.c"
#endif
#if MG_ENABLE_HTTP && MG_ENABLE_HTTP_WEBSOCKET
/* Amalgamated: #include "common/cs_sha1.h" */
#ifndef MG_WEBSOCKET_PING_INTERVAL_SECONDS
#define MG_WEBSOCKET_PING_INTERVAL_SECONDS 5
#endif
#define FLAGS_MASK_FIN (1 << 7)
#define FLAGS_MASK_OP 0x0f
static int mg_is_ws_fragment(unsigned char flags) {
return (flags & FLAGS_MASK_FIN) == 0 ||
(flags & FLAGS_MASK_OP) == WEBSOCKET_OP_CONTINUE;
}
static int mg_is_ws_first_fragment(unsigned char flags) {
return (flags & FLAGS_MASK_FIN) == 0 &&
(flags & FLAGS_MASK_OP) != WEBSOCKET_OP_CONTINUE;
}
static int mg_is_ws_control_frame(unsigned char flags) {
unsigned char op = (flags & FLAGS_MASK_OP);
return op == WEBSOCKET_OP_CLOSE || op == WEBSOCKET_OP_PING ||
op == WEBSOCKET_OP_PONG;
}
static void mg_handle_incoming_websocket_frame(struct mg_connection *nc,
struct websocket_message *wsm) {
if (wsm->flags & 0x8) {
mg_call(nc, nc->handler, nc->user_data, MG_EV_WEBSOCKET_CONTROL_FRAME, wsm);
} else {
mg_call(nc, nc->handler, nc->user_data, MG_EV_WEBSOCKET_FRAME, wsm);
}
}
static struct mg_ws_proto_data *mg_ws_get_proto_data(struct mg_connection *nc) {
struct mg_http_proto_data *htd = mg_http_get_proto_data(nc);
return (htd != NULL ? &htd->ws_data : NULL);
}
/*
* Sends a Close websocket frame with the given data, and closes the underlying
* connection. If `len` is ~0, strlen(data) is used.
*/
static void mg_ws_close(struct mg_connection *nc, const void *data,
size_t len) {
if ((int) len == ~0) {
len = strlen((const char *) data);
}
mg_send_websocket_frame(nc, WEBSOCKET_OP_CLOSE, data, len);
nc->flags |= MG_F_SEND_AND_CLOSE;
}
static int mg_deliver_websocket_data(struct mg_connection *nc) {
/* Using unsigned char *, cause of integer arithmetic below */
uint64_t i, data_len = 0, frame_len = 0, new_data_len = nc->recv_mbuf.len,
len, mask_len = 0, header_len = 0;
struct mg_ws_proto_data *wsd = mg_ws_get_proto_data(nc);
unsigned char *new_data = (unsigned char *) nc->recv_mbuf.buf,
*e = (unsigned char *) nc->recv_mbuf.buf + nc->recv_mbuf.len;
uint8_t flags;
int ok, reass;
if (wsd->reass_len > 0) {
/*
* We already have some previously received data which we need to
* reassemble and deliver to the client code when we get the final
* fragment.
*
* NOTE: it doesn't mean that the current message must be a continuation:
* it might be a control frame (Close, Ping or Pong), which should be
* handled without breaking the fragmented message.
*/
size_t existing_len = wsd->reass_len;
assert(new_data_len >= existing_len);
new_data += existing_len;
new_data_len -= existing_len;
}
flags = new_data[0];
reass = new_data_len > 0 && mg_is_ws_fragment(flags) &&
!(nc->flags & MG_F_WEBSOCKET_NO_DEFRAG);
if (reass && mg_is_ws_control_frame(flags)) {
/*
* Control frames can't be fragmented, so if we encounter fragmented
* control frame, close connection immediately.
*/
mg_ws_close(nc, "fragmented control frames are illegal", ~0);
return 0;
} else if (new_data_len > 0 && !reass && !mg_is_ws_control_frame(flags) &&
wsd->reass_len > 0) {
/*
* When in the middle of a fragmented message, only the continuations
* and control frames are allowed.
*/
mg_ws_close(nc, "non-continuation in the middle of a fragmented message",
~0);
return 0;
}
if (new_data_len >= 2) {
len = new_data[1] & 0x7f;
mask_len = new_data[1] & FLAGS_MASK_FIN ? 4 : 0;
if (len < 126 && new_data_len >= mask_len) {
data_len = len;
header_len = 2 + mask_len;
} else if (len == 126 && new_data_len >= 4 + mask_len) {
header_len = 4 + mask_len;
data_len = ntohs(*(uint16_t *) &new_data[2]);
} else if (new_data_len >= 10 + mask_len) {
header_len = 10 + mask_len;
data_len = (((uint64_t) ntohl(*(uint32_t *) &new_data[2])) << 32) +
ntohl(*(uint32_t *) &new_data[6]);
}
}
frame_len = header_len + data_len;
ok = (frame_len > 0 && frame_len <= new_data_len);
/* Check for overflow */
if (frame_len < header_len || frame_len < data_len) {
ok = 0;
mg_ws_close(nc, "overflowed message", ~0);
}
if (ok) {
size_t cleanup_len = 0;
struct websocket_message wsm;
wsm.size = (size_t) data_len;
wsm.data = new_data + header_len;
wsm.flags = flags;
/* Apply mask if necessary */
if (mask_len > 0) {
for (i = 0; i < data_len; i++) {
new_data[i + header_len] ^= (new_data + header_len - mask_len)[i % 4];
}
}
if (reass) {
/* This is a message fragment */
if (mg_is_ws_first_fragment(flags)) {
/*
* On the first fragmented frame, skip the first byte (op) and also
* reset size to 1 (op), it'll be incremented with the data len below.
*/
new_data += 1;
wsd->reass_len = 1 /* op */;
}
/* Append this frame to the reassembled buffer */
memmove(new_data, wsm.data, e - wsm.data);
wsd->reass_len += wsm.size;
nc->recv_mbuf.len -= wsm.data - new_data;
if (flags & FLAGS_MASK_FIN) {
/* On last fragmented frame - call user handler and remove data */
wsm.flags = FLAGS_MASK_FIN | nc->recv_mbuf.buf[0];
wsm.data = (unsigned char *) nc->recv_mbuf.buf + 1 /* op */;
wsm.size = wsd->reass_len - 1 /* op */;
cleanup_len = wsd->reass_len;
wsd->reass_len = 0;
/* Pass reassembled message to the client code. */
mg_handle_incoming_websocket_frame(nc, &wsm);
mbuf_remove(&nc->recv_mbuf, cleanup_len); /* Cleanup frame */
}
} else {
/*
* This is a complete message, not a fragment. It might happen in between
* of a fragmented message (in this case, WebSocket protocol requires
* current message to be a control frame).
*/
cleanup_len = (size_t) frame_len;
/* First of all, check if we need to react on a control frame. */
switch (flags & FLAGS_MASK_OP) {
case WEBSOCKET_OP_PING:
mg_send_websocket_frame(nc, WEBSOCKET_OP_PONG, wsm.data, wsm.size);
break;
case WEBSOCKET_OP_CLOSE:
mg_ws_close(nc, wsm.data, wsm.size);
break;
}
/* Pass received message to the client code. */
mg_handle_incoming_websocket_frame(nc, &wsm);
/* Cleanup frame */
memmove(nc->recv_mbuf.buf + wsd->reass_len,
nc->recv_mbuf.buf + wsd->reass_len + cleanup_len,
nc->recv_mbuf.len - wsd->reass_len - cleanup_len);
nc->recv_mbuf.len -= cleanup_len;
}
}
return ok;
}
struct ws_mask_ctx {
size_t pos; /* zero means unmasked */
uint32_t mask;
};
static uint32_t mg_ws_random_mask(void) {
uint32_t mask;
/*
* The spec requires WS client to generate hard to
* guess mask keys. From RFC6455, Section 5.3:
*
* The unpredictability of the masking key is essential to prevent
* authors of malicious applications from selecting the bytes that appear on
* the wire.
*
* Hence this feature is essential when the actual end user of this API
* is untrusted code that wouldn't have access to a lower level net API
* anyway (e.g. web browsers). Hence this feature is low prio for most
* mongoose use cases and thus can be disabled, e.g. when porting to a platform
* that lacks rand().
*/
#if MG_DISABLE_WS_RANDOM_MASK
mask = 0xefbeadde; /* generated with a random number generator, I swear */
#else
if (sizeof(long) >= 4) {
mask = (uint32_t) rand();
} else if (sizeof(long) == 2) {
mask = (uint32_t) rand() << 16 | (uint32_t) rand();
}
#endif
return mask;
}
static void mg_send_ws_header(struct mg_connection *nc, int op, size_t len,
struct ws_mask_ctx *ctx) {
int header_len;
unsigned char header[10];
header[0] =
(op & WEBSOCKET_DONT_FIN ? 0x0 : FLAGS_MASK_FIN) | (op & FLAGS_MASK_OP);
if (len < 126) {
header[1] = (unsigned char) len;
header_len = 2;
} else if (len < 65535) {
uint16_t tmp = htons((uint16_t) len);
header[1] = 126;
memcpy(&header[2], &tmp, sizeof(tmp));
header_len = 4;
} else {
uint32_t tmp;
header[1] = 127;
tmp = htonl((uint32_t)((uint64_t) len >> 32));
memcpy(&header[2], &tmp, sizeof(tmp));
tmp = htonl((uint32_t)(len & 0xffffffff));
memcpy(&header[6], &tmp, sizeof(tmp));
header_len = 10;
}
/* client connections enable masking */
if (nc->listener == NULL) {
header[1] |= 1 << 7; /* set masking flag */
mg_send(nc, header, header_len);
ctx->mask = mg_ws_random_mask();
mg_send(nc, &ctx->mask, sizeof(ctx->mask));
ctx->pos = nc->send_mbuf.len;
} else {
mg_send(nc, header, header_len);
ctx->pos = 0;
}
}
static void mg_ws_mask_frame(struct mbuf *mbuf, struct ws_mask_ctx *ctx) {
size_t i;
if (ctx->pos == 0) return;
for (i = 0; i < (mbuf->len - ctx->pos); i++) {
mbuf->buf[ctx->pos + i] ^= ((char *) &ctx->mask)[i % 4];
}
}
void mg_send_websocket_frame(struct mg_connection *nc, int op, const void *data,
size_t len) {
struct ws_mask_ctx ctx;
DBG(("%p %d %d", (void*)nc, op, (int) len));
mg_send_ws_header(nc, op, len, &ctx);
mg_send(nc, data, len);
mg_ws_mask_frame(&nc->send_mbuf, &ctx);
if (op == WEBSOCKET_OP_CLOSE) {
nc->flags |= MG_F_SEND_AND_CLOSE;
}
}
void mg_send_websocket_framev(struct mg_connection *nc, int op,
const struct mg_str *strv, int strvcnt) {
struct ws_mask_ctx ctx;
int i;
int len = 0;
for (i = 0; i < strvcnt; i++) {
len += strv[i].len;
}
mg_send_ws_header(nc, op, len, &ctx);
for (i = 0; i < strvcnt; i++) {
mg_send(nc, strv[i].p, strv[i].len);
}
mg_ws_mask_frame(&nc->send_mbuf, &ctx);
if (op == WEBSOCKET_OP_CLOSE) {
nc->flags |= MG_F_SEND_AND_CLOSE;
}
}
void mg_printf_websocket_frame(struct mg_connection *nc, int op,
const char *fmt, ...) {
char mem[MG_VPRINTF_BUFFER_SIZE], *buf = mem;
va_list ap;
int len;
va_start(ap, fmt);
if ((len = mg_avprintf(&buf, sizeof(mem), fmt, ap)) > 0) {
mg_send_websocket_frame(nc, op, buf, len);
}
va_end(ap);
if (buf != mem && buf != NULL) {
MG_FREE(buf);
}
}
MG_INTERNAL void mg_ws_handler(struct mg_connection *nc, int ev,
void *ev_data MG_UD_ARG(void *user_data)) {
mg_call(nc, nc->handler, nc->user_data, ev, ev_data);
switch (ev) {
case MG_EV_RECV:
do {
} while (mg_deliver_websocket_data(nc));
break;
case MG_EV_POLL:
/* Ping idle websocket connections */
{
time_t now = *(time_t *) ev_data;
if (nc->flags & MG_F_IS_WEBSOCKET &&
now > nc->last_io_time + MG_WEBSOCKET_PING_INTERVAL_SECONDS) {
mg_send_websocket_frame(nc, WEBSOCKET_OP_PING, "", 0);
}
}
break;
default:
break;
}
#if MG_ENABLE_CALLBACK_USERDATA
(void) user_data;
#endif
}
#ifndef MG_EXT_SHA1
void mg_hash_sha1_v(size_t num_msgs, const uint8_t *msgs[],
const size_t *msg_lens, uint8_t *digest) {
size_t i;
cs_sha1_ctx sha_ctx;
cs_sha1_init(&sha_ctx);
for (i = 0; i < num_msgs; i++) {
cs_sha1_update(&sha_ctx, msgs[i], msg_lens[i]);
}
cs_sha1_final(digest, &sha_ctx);
}
#else
extern void mg_hash_sha1_v(size_t num_msgs, const uint8_t *msgs[],
const size_t *msg_lens, uint8_t *digest);
#endif
MG_INTERNAL void mg_ws_handshake(struct mg_connection *nc,
const struct mg_str *key,
struct http_message *hm) {
static const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
const uint8_t *msgs[2] = {(const uint8_t *) key->p, (const uint8_t *) magic};
const size_t msg_lens[2] = {key->len, 36};
unsigned char sha[20];
char b64_sha[30];
struct mg_str *s;
mg_hash_sha1_v(2, msgs, msg_lens, sha);
mg_base64_encode(sha, sizeof(sha), b64_sha);
mg_printf(nc, "%s",
"HTTP/1.1 101 Switching Protocols\r\n"
"Upgrade: websocket\r\n"
"Connection: Upgrade\r\n");
s = mg_get_http_header(hm, "Sec-WebSocket-Protocol");
if (s != NULL) {
mg_printf(nc, "Sec-WebSocket-Protocol: %.*s\r\n", (int) s->len, s->p);
}
mg_printf(nc, "Sec-WebSocket-Accept: %s%s", b64_sha, "\r\n\r\n");
DBG(("%p %.*s %s", (void*)nc, (int) key->len, key->p, b64_sha));
}
void mg_send_websocket_handshake2(struct mg_connection *nc, const char *path,
const char *host, const char *protocol,
const char *extra_headers) {
mg_send_websocket_handshake3(nc, path, host, protocol, extra_headers, NULL,
NULL);
}
void mg_send_websocket_handshake3(struct mg_connection *nc, const char *path,
const char *host, const char *protocol,
const char *extra_headers, const char *user,
const char *pass) {
mg_send_websocket_handshake3v(nc, mg_mk_str(path), mg_mk_str(host),
mg_mk_str(protocol), mg_mk_str(extra_headers),
mg_mk_str(user), mg_mk_str(pass));
}
void mg_send_websocket_handshake3v(struct mg_connection *nc,
const struct mg_str path,
const struct mg_str host,
const struct mg_str protocol,
const struct mg_str extra_headers,
const struct mg_str user,
const struct mg_str pass) {
struct mbuf auth;
char key[25];
uint32_t nonce[4];
nonce[0] = mg_ws_random_mask();
nonce[1] = mg_ws_random_mask();
nonce[2] = mg_ws_random_mask();
nonce[3] = mg_ws_random_mask();
mg_base64_encode((unsigned char *) &nonce, sizeof(nonce), key);
mbuf_init(&auth, 0);
if (user.len > 0) {
mg_basic_auth_header(user, pass, &auth);
}
/*
* NOTE: the (auth.buf == NULL ? "" : auth.buf) is because cc3200 libc is
* broken: it doesn't like zero length to be passed to %.*s
* i.e. sprintf("f%.*so", (int)0, NULL), yields `f\0o`.
* because it handles NULL specially (and incorrectly).
*/
mg_printf(nc,
"GET %.*s HTTP/1.1\r\n"
"Upgrade: websocket\r\n"
"Connection: Upgrade\r\n"
"%.*s"
"Sec-WebSocket-Version: 13\r\n"
"Sec-WebSocket-Key: %s\r\n",
(int) path.len, path.p, (int) auth.len,
(auth.buf == NULL ? "" : auth.buf), key);
/* TODO(mkm): take default hostname from http proto data if host == NULL */
if (host.len > 0) {
int host_len = (int) (path.p - host.p); /* Account for possible :PORT */
mg_printf(nc, "Host: %.*s\r\n", host_len, host.p);
}
if (protocol.len > 0) {
mg_printf(nc, "Sec-WebSocket-Protocol: %.*s\r\n", (int) protocol.len,
protocol.p);
}
if (extra_headers.len > 0) {
mg_printf(nc, "%.*s", (int) extra_headers.len, extra_headers.p);
}
mg_printf(nc, "\r\n");
nc->flags |= MG_F_IS_WEBSOCKET;
mbuf_free(&auth);
}
void mg_send_websocket_handshake(struct mg_connection *nc, const char *path,
const char *extra_headers) {
struct mg_str null_str = MG_NULL_STR;
mg_send_websocket_handshake3v(
nc, mg_mk_str(path), null_str /* host */, null_str /* protocol */,
mg_mk_str(extra_headers), null_str /* user */, null_str /* pass */);
}
struct mg_connection *mg_connect_ws_opt(
struct mg_mgr *mgr, MG_CB(mg_event_handler_t ev_handler, void *user_data),
struct mg_connect_opts opts, const char *url, const char *protocol,
const char *extra_headers) {
struct mg_str null_str = MG_NULL_STR;
struct mg_str host = MG_NULL_STR, path = MG_NULL_STR, user_info = MG_NULL_STR;
struct mg_connection *nc =
mg_connect_http_base(mgr, MG_CB(ev_handler, user_data), opts, "http",
"ws", "https", "wss", url, &path, &user_info, &host);
if (nc != NULL) {
mg_send_websocket_handshake3v(nc, path, host, mg_mk_str(protocol),
mg_mk_str(extra_headers), user_info,
null_str);
}
return nc;
}
struct mg_connection *mg_connect_ws(
struct mg_mgr *mgr, MG_CB(mg_event_handler_t ev_handler, void *user_data),
const char *url, const char *protocol, const char *extra_headers) {
struct mg_connect_opts opts;
memset(&opts, 0, sizeof(opts));
return mg_connect_ws_opt(mgr, MG_CB(ev_handler, user_data), opts, url,
protocol, extra_headers);
}
#endif /* MG_ENABLE_HTTP && MG_ENABLE_HTTP_WEBSOCKET */
#ifdef MG_MODULE_LINES
#line 1 "src/mg_util.c"
#endif
/* Amalgamated: #include "common/cs_base64.h" */
/* Amalgamated: #include "mg_internal.h" */
/* Amalgamated: #include "mg_util.h" */
/* For platforms with limited libc */
#ifndef MAX
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#endif
const char *mg_skip(const char *s, const char *end, const char *delims,
struct mg_str *v) {
v->p = s;
while (s < end && strchr(delims, *(unsigned char *) s) == NULL) s++;
v->len = s - v->p;
while (s < end && strchr(delims, *(unsigned char *) s) != NULL) s++;
return s;
}
#if MG_ENABLE_FILESYSTEM && !defined(MG_USER_FILE_FUNCTIONS)
int mg_stat(const char *path, cs_stat_t *st) {
#ifdef _WIN32
wchar_t wpath[MG_MAX_PATH];
to_wchar(path, wpath, ARRAY_SIZE(wpath));
DBG(("[%ls] -> %d", wpath, _wstati64(wpath, st)));
return _wstati64(wpath, st);
#else
return stat(path, st);
#endif
}
FILE *mg_fopen(const char *path, const char *mode) {
#ifdef _WIN32
wchar_t wpath[MG_MAX_PATH], wmode[10];
to_wchar(path, wpath, ARRAY_SIZE(wpath));
to_wchar(mode, wmode, ARRAY_SIZE(wmode));
return _wfopen(wpath, wmode);
#else
return fopen(path, mode);
#endif
}
int mg_open(const char *path, int flag, int mode) { /* LCOV_EXCL_LINE */
#if defined(_WIN32) && !defined(WINCE)
wchar_t wpath[MG_MAX_PATH];
to_wchar(path, wpath, ARRAY_SIZE(wpath));
return _wopen(wpath, flag, mode);
#else
return open(path, flag, mode); /* LCOV_EXCL_LINE */
#endif
}
size_t mg_fread(void *ptr, size_t size, size_t count, FILE *f) {
return fread(ptr, size, count, f);
}
size_t mg_fwrite(const void *ptr, size_t size, size_t count, FILE *f) {
return fwrite(ptr, size, count, f);
}
#endif
void mg_base64_encode(const unsigned char *src, int src_len, char *dst) {
cs_base64_encode(src, src_len, dst);
}
int mg_base64_decode(const unsigned char *s, int len, char *dst) {
return cs_base64_decode(s, len, dst, NULL);
}
#if MG_ENABLE_THREADS
void *mg_start_thread(void *(*f)(void *), void *p) {
#ifdef WINCE
return (void *) CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) f, p, 0, NULL);
#elif defined(_WIN32)
return (void *) _beginthread((void(__cdecl *) (void *) ) f, 0, p);
#else
pthread_t thread_id = (pthread_t) 0;
pthread_attr_t attr;
(void) pthread_attr_init(&attr);
(void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
#if defined(MG_STACK_SIZE) && MG_STACK_SIZE > 1
(void) pthread_attr_setstacksize(&attr, MG_STACK_SIZE);
#endif
pthread_create(&thread_id, &attr, f, p);
pthread_attr_destroy(&attr);
return (void *) thread_id;
#endif
}
#endif /* MG_ENABLE_THREADS */
/* Set close-on-exec bit for a given socket. */
void mg_set_close_on_exec(sock_t sock) {
#if defined(_WIN32) && !defined(WINCE)
(void) SetHandleInformation((HANDLE) sock, HANDLE_FLAG_INHERIT, 0);
#elif defined(__unix__)
fcntl(sock, F_SETFD, FD_CLOEXEC);
#else
(void) sock;
#endif
}
int mg_sock_addr_to_str(const union socket_address *sa, char *buf, size_t len,
int flags) {
int is_v6;
if (buf == NULL || len <= 0) return 0;
memset(buf, 0, len);
#if MG_ENABLE_IPV6
is_v6 = sa->sa.sa_family == AF_INET6;
#else
is_v6 = 0;
#endif
if (flags & MG_SOCK_STRINGIFY_IP) {
#if MG_ENABLE_IPV6
const void *addr = NULL;
char *start = buf;
socklen_t capacity = len;
if (!is_v6) {
addr = &sa->sin.sin_addr;
} else {
addr = (void *) &sa->sin6.sin6_addr;
if (flags & MG_SOCK_STRINGIFY_PORT) {
*buf = '[';
start++;
capacity--;
}
}
if (inet_ntop(sa->sa.sa_family, addr, start, capacity) == NULL) {
goto cleanup;
}
#elif defined(_WIN32) || MG_LWIP || (MG_NET_IF == MG_NET_IF_PIC32)
/* Only Windoze Vista (and newer) have inet_ntop() */
char *addr_str = inet_ntoa(sa->sin.sin_addr);
if (addr_str != NULL) {
strncpy(buf, inet_ntoa(sa->sin.sin_addr), len - 1);
} else {
goto cleanup;
}
#else
if (inet_ntop(AF_INET, (void *) &sa->sin.sin_addr, buf, len) == NULL) {
goto cleanup;
}
#endif
}
if (flags & MG_SOCK_STRINGIFY_PORT) {
int port = ntohs(sa->sin.sin_port);
if (flags & MG_SOCK_STRINGIFY_IP) {
int buf_len = strlen(buf);
snprintf(buf + buf_len, len - (buf_len + 1), "%s:%d", (is_v6 ? "]" : ""),
port);
} else {
snprintf(buf, len, "%d", port);
}
}
return strlen(buf);
cleanup:
*buf = '\0';
return 0;
}
int mg_conn_addr_to_str(struct mg_connection *nc, char *buf, size_t len,
int flags) {
union socket_address sa;
memset(&sa, 0, sizeof(sa));
mg_if_get_conn_addr(nc, flags & MG_SOCK_STRINGIFY_REMOTE, &sa);
return mg_sock_addr_to_str(&sa, buf, len, flags);
}
#if MG_ENABLE_HEXDUMP
static int mg_hexdump_n(const void *buf, int len, char *dst, int dst_len,
int offset) {
const unsigned char *p = (const unsigned char *) buf;
char ascii[17] = "";
int i, idx, n = 0;
for (i = 0; i < len; i++) {
idx = i % 16;
if (idx == 0) {
if (i > 0) n += snprintf(dst + n, MAX(dst_len - n, 0), " %s\n", ascii);
n += snprintf(dst + n, MAX(dst_len - n, 0), "%04x ", i + offset);
}
if (dst_len - n < 0) {
return n;
}
n += snprintf(dst + n, MAX(dst_len - n, 0), " %02x", p[i]);
ascii[idx] = p[i] < 0x20 || p[i] > 0x7e ? '.' : p[i];
ascii[idx + 1] = '\0';
}
while (i++ % 16) n += snprintf(dst + n, MAX(dst_len - n, 0), "%s", " ");
n += snprintf(dst + n, MAX(dst_len - n, 0), " %s\n", ascii);
return n;
}
int mg_hexdump(const void *buf, int len, char *dst, int dst_len) {
return mg_hexdump_n(buf, len, dst, dst_len, 0);
}
void mg_hexdumpf(FILE *fp, const void *buf, int len) {
char tmp[80];
int offset = 0, n;
while (len > 0) {
n = (len < 16 ? len : 16);
mg_hexdump_n(((const char *) buf) + offset, n, tmp, sizeof(tmp), offset);
fputs(tmp, fp);
offset += n;
len -= n;
}
}
void mg_hexdump_connection(struct mg_connection *nc, const char *path,
const void *buf, int num_bytes, int ev) {
FILE *fp = NULL;
char src[60], dst[60];
const char *tag = NULL;
switch (ev) {
case MG_EV_RECV:
tag = "<-";
break;
case MG_EV_SEND:
tag = "->";
break;
case MG_EV_ACCEPT:
tag = " 0) {
mg_hexdumpf(fp, buf, num_bytes);
}
if (fp != stdout && fp != stderr) fclose(fp);
}
#endif
int mg_is_big_endian(void) {
static const int n = 1;
/* TODO(mkm) use compiletime check with 4-byte char literal */
return ((char *) &n)[0] == 0;
}
DO_NOT_WARN_UNUSED MG_INTERNAL int mg_get_errno(void) {
#ifndef WINCE
return errno;
#else
/* TODO(alashkin): translate error codes? */
return GetLastError();
#endif
}
void mg_mbuf_append_base64_putc(char ch, void *user_data) {
struct mbuf *mbuf = (struct mbuf *) user_data;
mbuf_append(mbuf, &ch, sizeof(ch));
}
void mg_mbuf_append_base64(struct mbuf *mbuf, const void *data, size_t len) {
struct cs_base64_ctx ctx;
cs_base64_init(&ctx, mg_mbuf_append_base64_putc, mbuf);
cs_base64_update(&ctx, (const char *) data, len);
cs_base64_finish(&ctx);
}
void mg_basic_auth_header(const struct mg_str user, const struct mg_str pass,
struct mbuf *buf) {
const char *header_prefix = "Authorization: Basic ";
const char *header_suffix = "\r\n";
struct cs_base64_ctx ctx;
cs_base64_init(&ctx, mg_mbuf_append_base64_putc, buf);
mbuf_append(buf, header_prefix, strlen(header_prefix));
cs_base64_update(&ctx, user.p, user.len);
if (pass.len > 0) {
cs_base64_update(&ctx, ":", 1);
cs_base64_update(&ctx, pass.p, pass.len);
}
cs_base64_finish(&ctx);
mbuf_append(buf, header_suffix, strlen(header_suffix));
}
struct mg_str mg_url_encode_opt(const struct mg_str src,
const struct mg_str safe, unsigned int flags) {
const char *hex =
(flags & MG_URL_ENCODE_F_UPPERCASE_HEX ? "0123456789ABCDEF"
: "0123456789abcdef");
size_t i = 0;
struct mbuf mb;
mbuf_init(&mb, src.len);
for (i = 0; i < src.len; i++) {
const unsigned char c = *((const unsigned char *) src.p + i);
if (isalnum(c) || mg_strchr(safe, c) != NULL) {
mbuf_append(&mb, &c, 1);
} else if (c == ' ' && (flags & MG_URL_ENCODE_F_SPACE_AS_PLUS)) {
mbuf_append(&mb, "+", 1);
} else {
mbuf_append(&mb, "%", 1);
mbuf_append(&mb, &hex[c >> 4], 1);
mbuf_append(&mb, &hex[c & 15], 1);
}
}
mbuf_append(&mb, "", 1);
mbuf_trim(&mb);
return mg_mk_str_n(mb.buf, mb.len - 1);
}
struct mg_str mg_url_encode(const struct mg_str src) {
return mg_url_encode_opt(src, mg_mk_str("._-$,;~()/"), 0);
}
#ifdef MG_MODULE_LINES
#line 1 "src/mg_mqtt.c"
#endif
#if MG_ENABLE_MQTT
#include
/* Amalgamated: #include "mg_internal.h" */
/* Amalgamated: #include "mg_mqtt.h" */
#define MG_F_MQTT_PING_PENDING MG_F_PROTO_1
static uint16_t getu16(const char *p) {
const uint8_t *up = (const uint8_t *) p;
return (up[0] << 8) + up[1];
}
static const char *scanto(const char *p, struct mg_str *s) {
s->len = getu16(p);
s->p = p + 2;
return s->p + s->len;
}
MG_INTERNAL int parse_mqtt(struct mbuf *io, struct mg_mqtt_message *mm) {
uint8_t header;
uint32_t len, len_len; /* must be 32-bit, see #1055 */
const char *p, *end, *eop = &io->buf[io->len];
unsigned char lc = 0;
int cmd;
if (io->len < 2) return MG_MQTT_ERROR_INCOMPLETE_MSG;
header = io->buf[0];
cmd = header >> 4;
/* decode mqtt variable length */
len = len_len = 0;
p = io->buf + 1;
while (p < eop) {
lc = *((const unsigned char *) p++);
len += (lc & 0x7f) << 7 * len_len;
len_len++;
if (!(lc & 0x80)) break;
if (len_len > sizeof(len)) return MG_MQTT_ERROR_MALFORMED_MSG;
}
end = p + len;
if (lc & 0x80 || end > eop) return MG_MQTT_ERROR_INCOMPLETE_MSG;
mm->cmd = cmd;
mm->qos = MG_MQTT_GET_QOS(header);
switch (cmd) {
case MG_MQTT_CMD_CONNECT: {
p = scanto(p, &mm->protocol_name);
if (p > end - 4) return MG_MQTT_ERROR_MALFORMED_MSG;
mm->protocol_version = *(uint8_t *) p++;
mm->connect_flags = *(uint8_t *) p++;
mm->keep_alive_timer = getu16(p);
p += 2;
if (p >= end) return MG_MQTT_ERROR_MALFORMED_MSG;
p = scanto(p, &mm->client_id);
if (p > end) return MG_MQTT_ERROR_MALFORMED_MSG;
if (mm->connect_flags & MG_MQTT_HAS_WILL) {
if (p >= end) return MG_MQTT_ERROR_MALFORMED_MSG;
p = scanto(p, &mm->will_topic);
}
if (mm->connect_flags & MG_MQTT_HAS_WILL) {
if (p >= end) return MG_MQTT_ERROR_MALFORMED_MSG;
p = scanto(p, &mm->will_message);
}
if (mm->connect_flags & MG_MQTT_HAS_USER_NAME) {
if (p >= end) return MG_MQTT_ERROR_MALFORMED_MSG;
p = scanto(p, &mm->user_name);
}
if (mm->connect_flags & MG_MQTT_HAS_PASSWORD) {
if (p >= end) return MG_MQTT_ERROR_MALFORMED_MSG;
p = scanto(p, &mm->password);
}
if (p != end) return MG_MQTT_ERROR_MALFORMED_MSG;
LOG(LL_DEBUG,
("%d %2x %d proto [%.*s] client_id [%.*s] will_topic [%.*s] "
"will_msg [%.*s] user_name [%.*s] password [%.*s]",
(int) len, (int) mm->connect_flags, (int) mm->keep_alive_timer,
(int) mm->protocol_name.len, mm->protocol_name.p,
(int) mm->client_id.len, mm->client_id.p, (int) mm->will_topic.len,
mm->will_topic.p, (int) mm->will_message.len, mm->will_message.p,
(int) mm->user_name.len, mm->user_name.p, (int) mm->password.len,
mm->password.p));
break;
}
case MG_MQTT_CMD_CONNACK:
if (end - p < 2) return MG_MQTT_ERROR_MALFORMED_MSG;
mm->connack_ret_code = p[1];
break;
case MG_MQTT_CMD_PUBACK:
case MG_MQTT_CMD_PUBREC:
case MG_MQTT_CMD_PUBREL:
case MG_MQTT_CMD_PUBCOMP:
case MG_MQTT_CMD_SUBACK:
if (end - p < 2) return MG_MQTT_ERROR_MALFORMED_MSG;
mm->message_id = getu16(p);
p += 2;
break;
case MG_MQTT_CMD_PUBLISH: {
p = scanto(p, &mm->topic);
if (p > end) return MG_MQTT_ERROR_MALFORMED_MSG;
if (mm->qos > 0) {
if (end - p < 2) return MG_MQTT_ERROR_MALFORMED_MSG;
mm->message_id = getu16(p);
p += 2;
}
mm->payload.p = p;
mm->payload.len = end - p;
break;
}
case MG_MQTT_CMD_SUBSCRIBE:
if (end - p < 2) return MG_MQTT_ERROR_MALFORMED_MSG;
mm->message_id = getu16(p);
p += 2;
/*
* topic expressions are left in the payload and can be parsed with
* `mg_mqtt_next_subscribe_topic`
*/
mm->payload.p = p;
mm->payload.len = end - p;
break;
default:
/* Unhandled command */
break;
}
mm->len = end - io->buf;
return mm->len;
}
static void mqtt_handler(struct mg_connection *nc, int ev,
void *ev_data MG_UD_ARG(void *user_data)) {
struct mbuf *io = &nc->recv_mbuf;
struct mg_mqtt_message mm;
memset(&mm, 0, sizeof(mm));
nc->handler(nc, ev, ev_data MG_UD_ARG(user_data));
switch (ev) {
case MG_EV_ACCEPT:
if (nc->proto_data == NULL) mg_set_protocol_mqtt(nc);
break;
case MG_EV_RECV: {
/* There can be multiple messages in the buffer, process them all. */
while (1) {
int len = parse_mqtt(io, &mm);
if (len < 0) {
if (len == MG_MQTT_ERROR_MALFORMED_MSG) {
/* Protocol error. */
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
} else if (len == MG_MQTT_ERROR_INCOMPLETE_MSG) {
/* Not fully buffered, let's check if we have a chance to get more
* data later */
if (nc->recv_mbuf_limit > 0 &&
nc->recv_mbuf.len >= nc->recv_mbuf_limit) {
LOG(LL_ERROR, ("%p recv buffer (%lu bytes) exceeds the limit "
"%lu bytes, and not drained, closing",
(void*)nc, (unsigned long) nc->recv_mbuf.len,
(unsigned long) nc->recv_mbuf_limit));
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
}
} else {
/* Should never be here */
LOG(LL_ERROR, ("%p invalid len: %d, closing", (void*)nc, len));
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
}
break;
}
if (mm.cmd == MG_MQTT_CMD_PINGRESP) {
LOG(LL_DEBUG, ("Recv PINGRESP"));
nc->flags &= ~MG_F_MQTT_PING_PENDING;
}
nc->handler(nc, MG_MQTT_EVENT_BASE + mm.cmd, &mm MG_UD_ARG(user_data));
mbuf_remove(io, len);
}
break;
}
case MG_EV_POLL: {
struct mg_mqtt_proto_data *pd =
(struct mg_mqtt_proto_data *) nc->proto_data;
double now = mg_time();
if (pd->keep_alive > 0 && pd->last_control_time > 0) {
double diff = (now - pd->last_control_time);
if (diff > pd->keep_alive) {
if (diff < 1500000000) {
if (!(nc->flags & MG_F_MQTT_PING_PENDING)) {
LOG(LL_DEBUG, ("Send PINGREQ"));
nc->flags |= MG_F_MQTT_PING_PENDING;
mg_mqtt_ping(nc);
} else {
LOG(LL_DEBUG, ("Ping timeout"));
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
}
} else {
/* Wall time has just been set. Avoid immediate ping,
* more likely than not it is not needed. The standard allows for
* 1.5X interval for ping requests, so even if were just about to
* send one, we should be ok waiting 0.4X more. */
pd->last_control_time = now - pd->keep_alive * 0.6;
}
}
}
break;
}
}
}
static void mg_mqtt_proto_data_destructor(void *proto_data) {
MG_FREE(proto_data);
}
static struct mg_str mg_mqtt_next_topic_component(struct mg_str *topic) {
struct mg_str res = *topic;
const char *c = mg_strchr(*topic, '/');
if (c != NULL) {
res.len = (c - topic->p);
topic->len -= (res.len + 1);
topic->p += (res.len + 1);
} else {
topic->len = 0;
}
return res;
}
/* Refernce: https://mosquitto.org/man/mqtt-7.html */
int mg_mqtt_match_topic_expression(struct mg_str exp, struct mg_str topic) {
struct mg_str ec, tc;
if (exp.len == 0) return 0;
while (1) {
ec = mg_mqtt_next_topic_component(&exp);
tc = mg_mqtt_next_topic_component(&topic);
if (ec.len == 0) {
if (tc.len != 0) return 0;
if (exp.len == 0) break;
continue;
}
if (mg_vcmp(&ec, "+") == 0) {
if (tc.len == 0 && topic.len == 0) return 0;
continue;
}
if (mg_vcmp(&ec, "#") == 0) {
/* Must be the last component in the expression or it's invalid. */
return (exp.len == 0);
}
if (mg_strcmp(ec, tc) != 0) {
return 0;
}
}
return (tc.len == 0 && topic.len == 0);
}
int mg_mqtt_vmatch_topic_expression(const char *exp, struct mg_str topic) {
return mg_mqtt_match_topic_expression(mg_mk_str(exp), topic);
}
void mg_set_protocol_mqtt(struct mg_connection *nc) {
nc->proto_handler = mqtt_handler;
nc->proto_data = MG_CALLOC(1, sizeof(struct mg_mqtt_proto_data));
nc->proto_data_destructor = mg_mqtt_proto_data_destructor;
}
static void mg_send_mqtt_header(struct mg_connection *nc, uint8_t cmd,
uint8_t flags, size_t len) {
struct mg_mqtt_proto_data *pd = (struct mg_mqtt_proto_data *) nc->proto_data;
uint8_t buf[1 + sizeof(size_t)];
uint8_t *vlen = &buf[1];
buf[0] = (cmd << 4) | flags;
/* mqtt variable length encoding */
do {
*vlen = len % 0x80;
len /= 0x80;
if (len > 0) *vlen |= 0x80;
vlen++;
} while (len > 0);
mg_send(nc, buf, vlen - buf);
pd->last_control_time = mg_time();
}
void mg_send_mqtt_handshake(struct mg_connection *nc, const char *client_id) {
static struct mg_send_mqtt_handshake_opts opts;
mg_send_mqtt_handshake_opt(nc, client_id, opts);
}
void mg_send_mqtt_handshake_opt(struct mg_connection *nc, const char *client_id,
struct mg_send_mqtt_handshake_opts opts) {
struct mg_mqtt_proto_data *pd = (struct mg_mqtt_proto_data *) nc->proto_data;
uint16_t id_len = 0, wt_len = 0, wm_len = 0, user_len = 0, pw_len = 0;
uint16_t netbytes;
size_t total_len;
if (client_id != NULL) {
id_len = strlen(client_id);
}
total_len = 7 + 1 + 2 + 2 + id_len;
if (opts.user_name != NULL) {
opts.flags |= MG_MQTT_HAS_USER_NAME;
}
if (opts.password != NULL) {
opts.flags |= MG_MQTT_HAS_PASSWORD;
}
if (opts.will_topic != NULL && opts.will_message != NULL) {
wt_len = strlen(opts.will_topic);
wm_len = strlen(opts.will_message);
opts.flags |= MG_MQTT_HAS_WILL;
}
if (opts.keep_alive == 0) {
opts.keep_alive = 60;
}
if (opts.flags & MG_MQTT_HAS_WILL) {
total_len += 2 + wt_len + 2 + wm_len;
}
if (opts.flags & MG_MQTT_HAS_USER_NAME) {
user_len = strlen(opts.user_name);
total_len += 2 + user_len;
}
if (opts.flags & MG_MQTT_HAS_PASSWORD) {
pw_len = strlen(opts.password);
total_len += 2 + pw_len;
}
mg_send_mqtt_header(nc, MG_MQTT_CMD_CONNECT, 0, total_len);
mg_send(nc, "\00\04MQTT\04", 7);
mg_send(nc, &opts.flags, 1);
netbytes = htons(opts.keep_alive);
mg_send(nc, &netbytes, 2);
netbytes = htons(id_len);
mg_send(nc, &netbytes, 2);
mg_send(nc, client_id, id_len);
if (opts.flags & MG_MQTT_HAS_WILL) {
netbytes = htons(wt_len);
mg_send(nc, &netbytes, 2);
mg_send(nc, opts.will_topic, wt_len);
netbytes = htons(wm_len);
mg_send(nc, &netbytes, 2);
mg_send(nc, opts.will_message, wm_len);
}
if (opts.flags & MG_MQTT_HAS_USER_NAME) {
netbytes = htons(user_len);
mg_send(nc, &netbytes, 2);
mg_send(nc, opts.user_name, user_len);
}
if (opts.flags & MG_MQTT_HAS_PASSWORD) {
netbytes = htons(pw_len);
mg_send(nc, &netbytes, 2);
mg_send(nc, opts.password, pw_len);
}
if (pd != NULL) {
pd->keep_alive = opts.keep_alive;
}
}
void mg_mqtt_publish(struct mg_connection *nc, const char *topic,
uint16_t message_id, int flags, const void *data,
size_t len) {
uint16_t netbytes;
uint16_t topic_len = strlen(topic);
size_t total_len = 2 + topic_len + len;
if (MG_MQTT_GET_QOS(flags) > 0) {
total_len += 2;
}
mg_send_mqtt_header(nc, MG_MQTT_CMD_PUBLISH, flags, total_len);
netbytes = htons(topic_len);
mg_send(nc, &netbytes, 2);
mg_send(nc, topic, topic_len);
if (MG_MQTT_GET_QOS(flags) > 0) {
netbytes = htons(message_id);
mg_send(nc, &netbytes, 2);
}
mg_send(nc, data, len);
}
void mg_mqtt_subscribe(struct mg_connection *nc,
const struct mg_mqtt_topic_expression *topics,
size_t topics_len, uint16_t message_id) {
uint16_t netbytes;
size_t i;
uint16_t topic_len;
size_t total_len = 2;
for (i = 0; i < topics_len; i++) {
total_len += 2 + strlen(topics[i].topic) + 1;
}
mg_send_mqtt_header(nc, MG_MQTT_CMD_SUBSCRIBE, MG_MQTT_QOS(1), total_len);
netbytes = htons(message_id);
mg_send(nc, (char *) &netbytes, 2);
for (i = 0; i < topics_len; i++) {
topic_len = strlen(topics[i].topic);
netbytes = htons(topic_len);
mg_send(nc, &netbytes, 2);
mg_send(nc, topics[i].topic, topic_len);
mg_send(nc, &topics[i].qos, 1);
}
}
int mg_mqtt_next_subscribe_topic(struct mg_mqtt_message *msg,
struct mg_str *topic, uint8_t *qos, int pos) {
unsigned char *buf = (unsigned char *) msg->payload.p + pos;
int new_pos;
if ((size_t) pos >= msg->payload.len) return -1;
topic->len = buf[0] << 8 | buf[1];
topic->p = (char *) buf + 2;
new_pos = pos + 2 + topic->len + 1;
if ((size_t) new_pos > msg->payload.len) return -1;
*qos = buf[2 + topic->len];
return new_pos;
}
void mg_mqtt_unsubscribe(struct mg_connection *nc, char **topics,
size_t topics_len, uint16_t message_id) {
uint16_t netbytes;
size_t i;
uint16_t topic_len;
size_t total_len = 2;
for (i = 0; i < topics_len; i++) {
total_len += 2 + strlen(topics[i]);
}
mg_send_mqtt_header(nc, MG_MQTT_CMD_UNSUBSCRIBE, MG_MQTT_QOS(1), total_len);
netbytes = htons(message_id);
mg_send(nc, (char *) &netbytes, 2);
for (i = 0; i < topics_len; i++) {
topic_len = strlen(topics[i]);
netbytes = htons(topic_len);
mg_send(nc, &netbytes, 2);
mg_send(nc, topics[i], topic_len);
}
}
void mg_mqtt_connack(struct mg_connection *nc, uint8_t return_code) {
uint8_t unused = 0;
mg_send_mqtt_header(nc, MG_MQTT_CMD_CONNACK, 0, 2);
mg_send(nc, &unused, 1);
mg_send(nc, &return_code, 1);
}
/*
* Sends a command which contains only a `message_id` and a QoS level of 1.
*
* Helper function.
*/
static void mg_send_mqtt_short_command(struct mg_connection *nc, uint8_t cmd,
uint16_t message_id) {
uint16_t netbytes;
uint8_t flags = (cmd == MG_MQTT_CMD_PUBREL ? 2 : 0);
mg_send_mqtt_header(nc, cmd, flags, 2 /* len */);
netbytes = htons(message_id);
mg_send(nc, &netbytes, 2);
}
void mg_mqtt_puback(struct mg_connection *nc, uint16_t message_id) {
mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBACK, message_id);
}
void mg_mqtt_pubrec(struct mg_connection *nc, uint16_t message_id) {
mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBREC, message_id);
}
void mg_mqtt_pubrel(struct mg_connection *nc, uint16_t message_id) {
mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBREL, message_id);
}
void mg_mqtt_pubcomp(struct mg_connection *nc, uint16_t message_id) {
mg_send_mqtt_short_command(nc, MG_MQTT_CMD_PUBCOMP, message_id);
}
void mg_mqtt_suback(struct mg_connection *nc, uint8_t *qoss, size_t qoss_len,
uint16_t message_id) {
size_t i;
uint16_t netbytes;
mg_send_mqtt_header(nc, MG_MQTT_CMD_SUBACK, MG_MQTT_QOS(1), 2 + qoss_len);
netbytes = htons(message_id);
mg_send(nc, &netbytes, 2);
for (i = 0; i < qoss_len; i++) {
mg_send(nc, &qoss[i], 1);
}
}
void mg_mqtt_unsuback(struct mg_connection *nc, uint16_t message_id) {
mg_send_mqtt_short_command(nc, MG_MQTT_CMD_UNSUBACK, message_id);
}
void mg_mqtt_ping(struct mg_connection *nc) {
mg_send_mqtt_header(nc, MG_MQTT_CMD_PINGREQ, 0, 0);
}
void mg_mqtt_pong(struct mg_connection *nc) {
mg_send_mqtt_header(nc, MG_MQTT_CMD_PINGRESP, 0, 0);
}
void mg_mqtt_disconnect(struct mg_connection *nc) {
mg_send_mqtt_header(nc, MG_MQTT_CMD_DISCONNECT, 0, 0);
}
#endif /* MG_ENABLE_MQTT */
#ifdef MG_MODULE_LINES
#line 1 "src/mg_mqtt_server.c"
#endif
/* Amalgamated: #include "mg_internal.h" */
/* Amalgamated: #include "mg_mqtt_server.h" */
#if MG_ENABLE_MQTT_BROKER
static void mg_mqtt_session_init(struct mg_mqtt_broker *brk,
struct mg_mqtt_session *s,
struct mg_connection *nc) {
s->brk = brk;
s->subscriptions = NULL;
s->num_subscriptions = 0;
s->nc = nc;
}
static void mg_mqtt_add_session(struct mg_mqtt_session *s) {
LIST_INSERT_HEAD(&s->brk->sessions, s, link);
}
static void mg_mqtt_remove_session(struct mg_mqtt_session *s) {
LIST_REMOVE(s, link);
}
static void mg_mqtt_destroy_session(struct mg_mqtt_session *s) {
size_t i;
for (i = 0; i < s->num_subscriptions; i++) {
MG_FREE((void *) s->subscriptions[i].topic);
}
MG_FREE(s->subscriptions);
MG_FREE(s);
}
static void mg_mqtt_close_session(struct mg_mqtt_session *s) {
mg_mqtt_remove_session(s);
mg_mqtt_destroy_session(s);
}
void mg_mqtt_broker_init(struct mg_mqtt_broker *brk, void *user_data) {
LIST_INIT(&brk->sessions);
brk->user_data = user_data;
}
static void mg_mqtt_broker_handle_connect(struct mg_mqtt_broker *brk,
struct mg_connection *nc) {
struct mg_mqtt_session *s =
(struct mg_mqtt_session *) MG_CALLOC(1, sizeof *s);
if (s == NULL) {
/* LCOV_EXCL_START */
mg_mqtt_connack(nc, MG_EV_MQTT_CONNACK_SERVER_UNAVAILABLE);
return;
/* LCOV_EXCL_STOP */
}
/* TODO(mkm): check header (magic and version) */
mg_mqtt_session_init(brk, s, nc);
nc->priv_2 = s;
mg_mqtt_add_session(s);
mg_mqtt_connack(nc, MG_EV_MQTT_CONNACK_ACCEPTED);
}
static void mg_mqtt_broker_handle_subscribe(struct mg_connection *nc,
struct mg_mqtt_message *msg) {
struct mg_mqtt_session *ss = (struct mg_mqtt_session *) nc->priv_2;
uint8_t qoss[MG_MQTT_MAX_SESSION_SUBSCRIPTIONS];
size_t num_subs = 0;
struct mg_str topic;
uint8_t qos;
int pos;
struct mg_mqtt_topic_expression *te;
for (pos = 0;
(pos = mg_mqtt_next_subscribe_topic(msg, &topic, &qos, pos)) != -1;) {
if (num_subs >= sizeof(MG_MQTT_MAX_SESSION_SUBSCRIPTIONS) ||
(ss->num_subscriptions + num_subs >=
MG_MQTT_MAX_SESSION_SUBSCRIPTIONS)) {
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
return;
}
qoss[num_subs++] = qos;
}
if (num_subs > 0) {
te = (struct mg_mqtt_topic_expression *) MG_REALLOC(
ss->subscriptions,
sizeof(*ss->subscriptions) * (ss->num_subscriptions + num_subs));
if (te == NULL) {
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
return;
}
ss->subscriptions = te;
for (pos = 0;
pos < (int) msg->payload.len &&
(pos = mg_mqtt_next_subscribe_topic(msg, &topic, &qos, pos)) != -1;
ss->num_subscriptions++) {
te = &ss->subscriptions[ss->num_subscriptions];
te->topic = (char *) MG_MALLOC(topic.len + 1);
te->qos = qos;
memcpy((char *) te->topic, topic.p, topic.len);
((char *) te->topic)[topic.len] = '\0';
}
}
if (pos == (int) msg->payload.len) {
mg_mqtt_suback(nc, qoss, num_subs, msg->message_id);
} else {
/* We did not fully parse the payload, something must be wrong. */
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
}
}
static void mg_mqtt_broker_handle_publish(struct mg_mqtt_broker *brk,
struct mg_mqtt_message *msg) {
struct mg_mqtt_session *s;
size_t i;
for (s = mg_mqtt_next(brk, NULL); s != NULL; s = mg_mqtt_next(brk, s)) {
for (i = 0; i < s->num_subscriptions; i++) {
if (mg_mqtt_vmatch_topic_expression(s->subscriptions[i].topic,
msg->topic)) {
char buf[100], *p = buf;
mg_asprintf(&p, sizeof(buf), "%.*s", (int) msg->topic.len,
msg->topic.p);
if (p == NULL) {
return;
}
mg_mqtt_publish(s->nc, p, 0, 0, msg->payload.p, msg->payload.len);
if (p != buf) {
MG_FREE(p);
}
break;
}
}
}
}
void mg_mqtt_broker(struct mg_connection *nc, int ev, void *data) {
struct mg_mqtt_message *msg = (struct mg_mqtt_message *) data;
struct mg_mqtt_broker *brk;
if (nc->listener) {
brk = (struct mg_mqtt_broker *) nc->listener->priv_2;
} else {
brk = (struct mg_mqtt_broker *) nc->priv_2;
}
switch (ev) {
case MG_EV_ACCEPT:
if (nc->proto_data == NULL) mg_set_protocol_mqtt(nc);
nc->priv_2 = NULL; /* Clear up the inherited pointer to broker */
break;
case MG_EV_MQTT_CONNECT:
if (nc->priv_2 == NULL) {
mg_mqtt_broker_handle_connect(brk, nc);
} else {
/* Repeated CONNECT */
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
}
break;
case MG_EV_MQTT_SUBSCRIBE:
if (nc->priv_2 != NULL) {
mg_mqtt_broker_handle_subscribe(nc, msg);
} else {
/* Subscribe before CONNECT */
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
}
break;
case MG_EV_MQTT_PUBLISH:
if (nc->priv_2 != NULL) {
mg_mqtt_broker_handle_publish(brk, msg);
} else {
/* Publish before CONNECT */
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
}
break;
case MG_EV_CLOSE:
if (nc->listener && nc->priv_2 != NULL) {
mg_mqtt_close_session((struct mg_mqtt_session *) nc->priv_2);
}
break;
}
}
struct mg_mqtt_session *mg_mqtt_next(struct mg_mqtt_broker *brk,
struct mg_mqtt_session *s) {
return s == NULL ? LIST_FIRST(&brk->sessions) : LIST_NEXT(s, link);
}
#endif /* MG_ENABLE_MQTT_BROKER */
#ifdef MG_MODULE_LINES
#line 1 "src/mg_dns.c"
#endif
#if MG_ENABLE_DNS
/* Amalgamated: #include "mg_internal.h" */
/* Amalgamated: #include "mg_dns.h" */
static int mg_dns_tid = 0xa0;
struct mg_dns_header {
uint16_t transaction_id;
uint16_t flags;
uint16_t num_questions;
uint16_t num_answers;
uint16_t num_authority_prs;
uint16_t num_other_prs;
};
struct mg_dns_resource_record *mg_dns_next_record(
struct mg_dns_message *msg, int query,
struct mg_dns_resource_record *prev) {
struct mg_dns_resource_record *rr;
for (rr = (prev == NULL ? msg->answers : prev + 1);
rr - msg->answers < msg->num_answers; rr++) {
if (rr->rtype == query) {
return rr;
}
}
return NULL;
}
int mg_dns_parse_record_data(struct mg_dns_message *msg,
struct mg_dns_resource_record *rr, void *data,
size_t data_len) {
switch (rr->rtype) {
case MG_DNS_A_RECORD:
if (data_len < sizeof(struct in_addr)) {
return -1;
}
if (rr->rdata.p + data_len > msg->pkt.p + msg->pkt.len) {
return -1;
}
memcpy(data, rr->rdata.p, data_len);
return 0;
#if MG_ENABLE_IPV6
case MG_DNS_AAAA_RECORD:
if (data_len < sizeof(struct in6_addr)) {
return -1; /* LCOV_EXCL_LINE */
}
memcpy(data, rr->rdata.p, data_len);
return 0;
#endif
case MG_DNS_CNAME_RECORD:
mg_dns_uncompress_name(msg, &rr->rdata, (char *) data, data_len);
return 0;
}
return -1;
}
int mg_dns_insert_header(struct mbuf *io, size_t pos,
struct mg_dns_message *msg) {
struct mg_dns_header header;
memset(&header, 0, sizeof(header));
header.transaction_id = msg->transaction_id;
header.flags = htons(msg->flags);
header.num_questions = htons(msg->num_questions);
header.num_answers = htons(msg->num_answers);
return mbuf_insert(io, pos, &header, sizeof(header));
}
int mg_dns_copy_questions(struct mbuf *io, struct mg_dns_message *msg) {
unsigned char *begin, *end;
struct mg_dns_resource_record *last_q;
if (msg->num_questions <= 0) return 0;
begin = (unsigned char *) msg->pkt.p + sizeof(struct mg_dns_header);
last_q = &msg->questions[msg->num_questions - 1];
end = (unsigned char *) last_q->name.p + last_q->name.len + 4;
return mbuf_append(io, begin, end - begin);
}
int mg_dns_encode_name_s(struct mbuf *io, struct mg_str name) {
const char *s;
unsigned char n;
size_t pos = io->len;
do {
if ((s = mg_strchr(name, '.')) == NULL) {
s = name.p + name.len;
}
if (s - name.p > 127) {
return -1; /* TODO(mkm) cover */
}
n = s - name.p; /* chunk length */
mbuf_append(io, &n, 1); /* send length */
mbuf_append(io, name.p, n);
if (n < name.len && *s == '.') {
n++;
}
name.p += n;
name.len -= n;
} while (name.len > 0);
mbuf_append(io, "\0", 1); /* Mark end of host name */
return io->len - pos;
}
int mg_dns_encode_name(struct mbuf *io, const char *name, size_t len) {
return mg_dns_encode_name_s(io, mg_mk_str_n(name, len));
}
int mg_dns_encode_record(struct mbuf *io, struct mg_dns_resource_record *rr,
const char *name, size_t nlen, const void *rdata,
size_t rlen) {
size_t pos = io->len;
uint16_t u16;
uint32_t u32;
if (rr->kind == MG_DNS_INVALID_RECORD) {
return -1; /* LCOV_EXCL_LINE */
}
if (mg_dns_encode_name(io, name, nlen) == -1) {
return -1;
}
u16 = htons(rr->rtype);
mbuf_append(io, &u16, 2);
u16 = htons(rr->rclass);
mbuf_append(io, &u16, 2);
if (rr->kind == MG_DNS_ANSWER) {
u32 = htonl(rr->ttl);
mbuf_append(io, &u32, 4);
if (rr->rtype == MG_DNS_CNAME_RECORD) {
int clen;
/* fill size after encoding */
size_t off = io->len;
mbuf_append(io, &u16, 2);
if ((clen = mg_dns_encode_name(io, (const char *) rdata, rlen)) == -1) {
return -1;
}
u16 = clen;
io->buf[off] = u16 >> 8;
io->buf[off + 1] = u16 & 0xff;
} else {
u16 = htons((uint16_t) rlen);
mbuf_append(io, &u16, 2);
mbuf_append(io, rdata, rlen);
}
}
return io->len - pos;
}
void mg_send_dns_query(struct mg_connection *nc, const char *name,
int query_type) {
struct mg_dns_message *msg =
(struct mg_dns_message *) MG_CALLOC(1, sizeof(*msg));
struct mbuf pkt;
struct mg_dns_resource_record *rr = &msg->questions[0];
DBG(("%s %d", name, query_type));
mbuf_init(&pkt, 64 /* Start small, it'll grow as needed. */);
msg->transaction_id = ++mg_dns_tid;
msg->flags = 0x100;
msg->num_questions = 1;
mg_dns_insert_header(&pkt, 0, msg);
rr->rtype = query_type;
rr->rclass = 1; /* Class: inet */
rr->kind = MG_DNS_QUESTION;
if (mg_dns_encode_record(&pkt, rr, name, strlen(name), NULL, 0) == -1) {
/* TODO(mkm): return an error code */
goto cleanup; /* LCOV_EXCL_LINE */
}
/* TCP DNS requires messages to be prefixed with len */
if (!(nc->flags & MG_F_UDP)) {
uint16_t len = htons((uint16_t) pkt.len);
mbuf_insert(&pkt, 0, &len, 2);
}
mg_send(nc, pkt.buf, pkt.len);
mbuf_free(&pkt);
cleanup:
MG_FREE(msg);
}
static unsigned char *mg_parse_dns_resource_record(
unsigned char *data, unsigned char *end, struct mg_dns_resource_record *rr,
int reply) {
unsigned char *name = data;
int chunk_len, data_len;
while (data < end && (chunk_len = *data)) {
if (((unsigned char *) data)[0] & 0xc0) {
data += 1;
break;
}
data += chunk_len + 1;
}
if (data > end - 5) {
return NULL;
}
rr->name.p = (char *) name;
rr->name.len = data - name + 1;
data++;
rr->rtype = data[0] << 8 | data[1];
data += 2;
rr->rclass = data[0] << 8 | data[1];
data += 2;
rr->kind = reply ? MG_DNS_ANSWER : MG_DNS_QUESTION;
if (reply) {
if (data >= end - 6) {
return NULL;
}
rr->ttl = (uint32_t) data[0] << 24 | (uint32_t) data[1] << 16 |
data[2] << 8 | data[3];
data += 4;
data_len = *data << 8 | *(data + 1);
data += 2;
rr->rdata.p = (char *) data;
rr->rdata.len = data_len;
data += data_len;
}
return data;
}
int mg_parse_dns(const char *buf, int len, struct mg_dns_message *msg) {
struct mg_dns_header *header = (struct mg_dns_header *) buf;
unsigned char *data = (unsigned char *) buf + sizeof(*header);
unsigned char *end = (unsigned char *) buf + len;
int i;
memset(msg, 0, sizeof(*msg));
msg->pkt.p = buf;
msg->pkt.len = len;
if (len < (int) sizeof(*header)) return -1;
msg->transaction_id = header->transaction_id;
msg->flags = ntohs(header->flags);
msg->num_questions = ntohs(header->num_questions);
if (msg->num_questions > (int) ARRAY_SIZE(msg->questions)) {
msg->num_questions = (int) ARRAY_SIZE(msg->questions);
}
msg->num_answers = ntohs(header->num_answers);
if (msg->num_answers > (int) ARRAY_SIZE(msg->answers)) {
msg->num_answers = (int) ARRAY_SIZE(msg->answers);
}
for (i = 0; i < msg->num_questions; i++) {
data = mg_parse_dns_resource_record(data, end, &msg->questions[i], 0);
if (data == NULL) return -1;
}
for (i = 0; i < msg->num_answers; i++) {
data = mg_parse_dns_resource_record(data, end, &msg->answers[i], 1);
if (data == NULL) return -1;
}
return 0;
}
size_t mg_dns_uncompress_name(struct mg_dns_message *msg, struct mg_str *name,
char *dst, int dst_len) {
int chunk_len, num_ptrs = 0;
char *old_dst = dst;
const unsigned char *data = (unsigned char *) name->p;
const unsigned char *end = (unsigned char *) msg->pkt.p + msg->pkt.len;
if (data >= end) {
return 0;
}
while ((chunk_len = *data++)) {
int leeway = dst_len - (dst - old_dst);
if (data >= end) {
return 0;
}
if ((chunk_len & 0xc0) == 0xc0) {
uint16_t off = (data[-1] & (~0xc0)) << 8 | data[0];
if (off >= msg->pkt.len) {
return 0;
}
/* Basic circular loop avoidance: allow up to 16 pointer hops. */
if (++num_ptrs > 15) {
return 0;
}
data = (unsigned char *) msg->pkt.p + off;
continue;
}
if (chunk_len > 63) {
return 0;
}
if (chunk_len > leeway) {
chunk_len = leeway;
}
if (data + chunk_len >= end) {
return 0;
}
memcpy(dst, data, chunk_len);
data += chunk_len;
dst += chunk_len;
leeway -= chunk_len;
if (leeway == 0) {
return dst - old_dst;
}
*dst++ = '.';
}
if (dst != old_dst) {
*--dst = 0;
}
return dst - old_dst;
}
static void dns_handler(struct mg_connection *nc, int ev,
void *ev_data MG_UD_ARG(void *user_data)) {
struct mbuf *io = &nc->recv_mbuf;
struct mg_dns_message msg;
/* Pass low-level events to the user handler */
nc->handler(nc, ev, ev_data MG_UD_ARG(user_data));
switch (ev) {
case MG_EV_RECV:
if (!(nc->flags & MG_F_UDP)) {
mbuf_remove(&nc->recv_mbuf, 2);
}
if (mg_parse_dns(nc->recv_mbuf.buf, nc->recv_mbuf.len, &msg) == -1) {
/* reply + recursion allowed + format error */
memset(&msg, 0, sizeof(msg));
msg.flags = 0x8081;
mg_dns_insert_header(io, 0, &msg);
if (!(nc->flags & MG_F_UDP)) {
uint16_t len = htons((uint16_t) io->len);
mbuf_insert(io, 0, &len, 2);
}
mg_send(nc, io->buf, io->len);
} else {
/* Call user handler with parsed message */
nc->handler(nc, MG_DNS_MESSAGE, &msg MG_UD_ARG(user_data));
}
mbuf_remove(io, io->len);
break;
}
}
void mg_set_protocol_dns(struct mg_connection *nc) {
nc->proto_handler = dns_handler;
}
#endif /* MG_ENABLE_DNS */
#ifdef MG_MODULE_LINES
#line 1 "src/mg_dns_server.c"
#endif
#if MG_ENABLE_DNS_SERVER
/* Amalgamated: #include "mg_internal.h" */
/* Amalgamated: #include "dns-server.h" */
struct mg_dns_reply mg_dns_create_reply(struct mbuf *io,
struct mg_dns_message *msg) {
struct mg_dns_reply rep;
rep.msg = msg;
rep.io = io;
rep.start = io->len;
/* reply + recursion allowed */
msg->flags |= 0x8080;
mg_dns_copy_questions(io, msg);
msg->num_answers = 0;
return rep;
}
void mg_dns_send_reply(struct mg_connection *nc, struct mg_dns_reply *r) {
size_t sent = r->io->len - r->start;
mg_dns_insert_header(r->io, r->start, r->msg);
if (!(nc->flags & MG_F_UDP)) {
uint16_t len = htons((uint16_t) sent);
mbuf_insert(r->io, r->start, &len, 2);
}
if (&nc->send_mbuf != r->io) {
mg_send(nc, r->io->buf + r->start, r->io->len - r->start);
r->io->len = r->start;
}
}
int mg_dns_reply_record(struct mg_dns_reply *reply,
struct mg_dns_resource_record *question,
const char *name, int rtype, int ttl, const void *rdata,
size_t rdata_len) {
struct mg_dns_message *msg = (struct mg_dns_message *) reply->msg;
char rname[512];
struct mg_dns_resource_record *ans = &msg->answers[msg->num_answers];
if (msg->num_answers >= MG_MAX_DNS_ANSWERS) {
return -1; /* LCOV_EXCL_LINE */
}
if (name == NULL) {
name = rname;
rname[511] = 0;
mg_dns_uncompress_name(msg, &question->name, rname, sizeof(rname) - 1);
}
*ans = *question;
ans->kind = MG_DNS_ANSWER;
ans->rtype = rtype;
ans->ttl = ttl;
if (mg_dns_encode_record(reply->io, ans, name, strlen(name), rdata,
rdata_len) == -1) {
return -1; /* LCOV_EXCL_LINE */
};
msg->num_answers++;
return 0;
}
#endif /* MG_ENABLE_DNS_SERVER */
#ifdef MG_MODULE_LINES
#line 1 "src/mg_resolv.c"
#endif
#if MG_ENABLE_ASYNC_RESOLVER
/* Amalgamated: #include "mg_internal.h" */
/* Amalgamated: #include "mg_resolv.h" */
#ifndef MG_DEFAULT_NAMESERVER
#define MG_DEFAULT_NAMESERVER "8.8.8.8"
#endif
struct mg_resolve_async_request {
char name[1024];
int query;
mg_resolve_callback_t callback;
void *data;
time_t timeout;
int max_retries;
enum mg_resolve_err err;
/* state */
time_t last_time;
int retries;
};
/*
* Find what nameserver to use.
*
* Return 0 if OK, -1 if error
*/
static int mg_get_ip_address_of_nameserver(char *name, size_t name_len) {
int ret = -1;
#ifdef _WIN32
int i;
LONG err;
HKEY hKey, hSub;
wchar_t subkey[512], value[128],
*key = L"SYSTEM\\ControlSet001\\Services\\Tcpip\\Parameters\\Interfaces";
if ((err = RegOpenKeyExW(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hKey)) !=
ERROR_SUCCESS) {
fprintf(stderr, "cannot open reg key %S: %ld\n", key, err);
ret = -1;
} else {
for (ret = -1, i = 0; 1; i++) {
DWORD subkey_size = sizeof(subkey), type, len = sizeof(value);
if (RegEnumKeyExW(hKey, i, subkey, &subkey_size, NULL, NULL, NULL,
NULL) != ERROR_SUCCESS) {
break;
}
if (RegOpenKeyExW(hKey, subkey, 0, KEY_READ, &hSub) == ERROR_SUCCESS &&
((RegQueryValueExW(hSub, L"NameServer", 0, &type, (void *) value,
&len) == ERROR_SUCCESS &&
value[0] != '\0') ||
(RegQueryValueExW(hSub, L"DhcpNameServer", 0, &type, (void *) value,
&len) == ERROR_SUCCESS &&
value[0] != '\0'))) {
/*
* See https://github.com/cesanta/mongoose/issues/176
* The value taken from the registry can be empty, a single
* IP address, or multiple IP addresses separated by comma.
* If it's empty, check the next interface.
* If it's multiple IP addresses, take the first one.
*/
wchar_t *comma = wcschr(value, ',');
if (comma != NULL) {
*comma = '\0';
}
/* %S will convert wchar_t -> char */
snprintf(name, name_len, "%S", value);
ret = 0;
RegCloseKey(hSub);
break;
}
}
RegCloseKey(hKey);
}
#elif MG_ENABLE_FILESYSTEM && defined(MG_RESOLV_CONF_FILE_NAME)
FILE *fp;
char line[512];
if ((fp = mg_fopen(MG_RESOLV_CONF_FILE_NAME, "r")) == NULL) {
ret = -1;
} else {
/* Try to figure out what nameserver to use */
for (ret = -1; fgets(line, sizeof(line), fp) != NULL;) {
unsigned int a, b, c, d;
if (sscanf(line, "nameserver %u.%u.%u.%u", &a, &b, &c, &d) == 4) {
snprintf(name, name_len, "%u.%u.%u.%u", a, b, c, d);
ret = 0;
break;
}
}
(void) fclose(fp);
}
#else
snprintf(name, name_len, "%s", MG_DEFAULT_NAMESERVER);
#endif /* _WIN32 */
return ret;
}
int mg_resolve_from_hosts_file(const char *name, union socket_address *usa) {
#if MG_ENABLE_FILESYSTEM && defined(MG_HOSTS_FILE_NAME)
/* TODO(mkm) cache /etc/hosts */
FILE *fp;
char line[1024];
char *p;
char alias[256];
unsigned int a, b, c, d;
int len = 0;
if ((fp = mg_fopen(MG_HOSTS_FILE_NAME, "r")) == NULL) {
return -1;
}
for (; fgets(line, sizeof(line), fp) != NULL;) {
if (line[0] == '#') continue;
if (sscanf(line, "%u.%u.%u.%u%n", &a, &b, &c, &d, &len) == 0) {
/* TODO(mkm): handle ipv6 */
continue;
}
for (p = line + len; sscanf(p, "%s%n", alias, &len) == 1; p += len) {
if (strcmp(alias, name) == 0) {
usa->sin.sin_addr.s_addr = htonl(a << 24 | b << 16 | c << 8 | d);
fclose(fp);
return 0;
}
}
}
fclose(fp);
#else
(void) name;
(void) usa;
#endif
return -1;
}
static void mg_resolve_async_eh(struct mg_connection *nc, int ev,
void *data MG_UD_ARG(void *user_data)) {
time_t now = (time_t) mg_time();
struct mg_resolve_async_request *req;
struct mg_dns_message *msg;
#if !MG_ENABLE_CALLBACK_USERDATA
void *user_data = nc->user_data;
#endif
if (ev != MG_EV_POLL) {
DBG(("ev=%d user_data=%p", ev, (void*)user_data));
}
req = (struct mg_resolve_async_request *) user_data;
if (req == NULL) {
return;
}
switch (ev) {
case MG_EV_POLL:
if (req->retries > req->max_retries) {
req->err = MG_RESOLVE_EXCEEDED_RETRY_COUNT;
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
break;
}
if (nc->flags & MG_F_CONNECTING) break;
/* fallthrough */
case MG_EV_CONNECT:
if (req->retries == 0 || now - req->last_time >= req->timeout) {
mg_send_dns_query(nc, req->name, req->query);
req->last_time = now;
req->retries++;
}
break;
case MG_EV_RECV:
msg = (struct mg_dns_message *) MG_MALLOC(sizeof(*msg));
if (mg_parse_dns(nc->recv_mbuf.buf, *(int *) data, msg) == 0 &&
msg->num_answers > 0) {
req->callback(msg, req->data, MG_RESOLVE_OK);
nc->user_data = NULL;
MG_FREE(req);
} else {
req->err = MG_RESOLVE_NO_ANSWERS;
}
MG_FREE(msg);
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
break;
case MG_EV_SEND:
/*
* If a send error occurs, prevent closing of the connection by the core.
* We will retry after timeout.
*/
nc->flags &= ~MG_F_CLOSE_IMMEDIATELY;
mbuf_remove(&nc->send_mbuf, nc->send_mbuf.len);
break;
case MG_EV_TIMER:
req->err = MG_RESOLVE_TIMEOUT;
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
break;
case MG_EV_CLOSE:
/* If we got here with request still not done, fire an error callback. */
if (req != NULL) {
char addr[32];
mg_sock_addr_to_str(&nc->sa, addr, sizeof(addr), MG_SOCK_STRINGIFY_IP);
#ifdef MG_LOG_DNS_FAILURES
LOG(LL_ERROR, ("Failed to resolve '%s', server %s", req->name, addr));
#endif
req->callback(NULL, req->data, req->err);
nc->user_data = NULL;
MG_FREE(req);
}
break;
}
}
int mg_resolve_async(struct mg_mgr *mgr, const char *name, int query,
mg_resolve_callback_t cb, void *data) {
struct mg_resolve_async_opts opts;
memset(&opts, 0, sizeof(opts));
return mg_resolve_async_opt(mgr, name, query, cb, data, opts);
}
int mg_resolve_async_opt(struct mg_mgr *mgr, const char *name, int query,
mg_resolve_callback_t cb, void *data,
struct mg_resolve_async_opts opts) {
struct mg_resolve_async_request *req;
struct mg_connection *dns_nc;
const char *nameserver = opts.nameserver;
char dns_server_buff[17], nameserver_url[26];
if (nameserver == NULL) {
nameserver = mgr->nameserver;
}
DBG(("%s %d %p", name, query, (void*)opts.dns_conn));
/* resolve with DNS */
req = (struct mg_resolve_async_request *) MG_CALLOC(1, sizeof(*req));
if (req == NULL) {
return -1;
}
strncpy(req->name, name, sizeof(req->name));
req->name[sizeof(req->name) - 1] = '\0';
req->query = query;
req->callback = cb;
req->data = data;
/* TODO(mkm): parse defaults out of resolve.conf */
req->max_retries = opts.max_retries ? opts.max_retries : 2;
req->timeout = opts.timeout ? opts.timeout : 5;
/* Lazily initialize dns server */
if (nameserver == NULL) {
if (mg_get_ip_address_of_nameserver(dns_server_buff,
sizeof(dns_server_buff)) != -1) {
nameserver = dns_server_buff;
} else {
nameserver = MG_DEFAULT_NAMESERVER;
}
}
snprintf(nameserver_url, sizeof(nameserver_url), "udp://%s:53", nameserver);
dns_nc = mg_connect(mgr, nameserver_url, MG_CB(mg_resolve_async_eh, NULL));
if (dns_nc == NULL) {
MG_FREE(req);
return -1;
}
dns_nc->user_data = req;
if (opts.dns_conn != NULL) {
*opts.dns_conn = dns_nc;
}
return 0;
}
void mg_set_nameserver(struct mg_mgr *mgr, const char *nameserver) {
MG_FREE((char *) mgr->nameserver);
mgr->nameserver = NULL;
if (nameserver != NULL) {
mgr->nameserver = strdup(nameserver);
}
}
#endif /* MG_ENABLE_ASYNC_RESOLVER */
#ifdef MG_MODULE_LINES
#line 1 "src/mg_coap.c"
#endif
/* Amalgamated: #include "mg_internal.h" */
/* Amalgamated: #include "mg_coap.h" */
#if MG_ENABLE_COAP
void mg_coap_free_options(struct mg_coap_message *cm) {
while (cm->options != NULL) {
struct mg_coap_option *next = cm->options->next;
MG_FREE(cm->options);
cm->options = next;
}
}
struct mg_coap_option *mg_coap_add_option(struct mg_coap_message *cm,
uint32_t number, char *value,
size_t len) {
struct mg_coap_option *new_option =
(struct mg_coap_option *) MG_CALLOC(1, sizeof(*new_option));
new_option->number = number;
new_option->value.p = value;
new_option->value.len = len;
if (cm->options == NULL) {
cm->options = cm->optiomg_tail = new_option;
} else {
/*
* A very simple attention to help clients to compose options:
* CoAP wants to see options ASC ordered.
* Could be change by using sort in coap_compose
*/
if (cm->optiomg_tail->number <= new_option->number) {
/* if option is already ordered just add it */
cm->optiomg_tail = cm->optiomg_tail->next = new_option;
} else {
/* looking for appropriate position */
struct mg_coap_option *current_opt = cm->options;
struct mg_coap_option *prev_opt = 0;
while (current_opt != NULL) {
if (current_opt->number > new_option->number) {
break;
}
prev_opt = current_opt;
current_opt = current_opt->next;
}
if (prev_opt != NULL) {
prev_opt->next = new_option;
new_option->next = current_opt;
} else {
/* insert new_option to the beginning */
new_option->next = cm->options;
cm->options = new_option;
}
}
}
return new_option;
}
/*
* Fills CoAP header in mg_coap_message.
*
* Helper function.
*/
static char *coap_parse_header(char *ptr, struct mbuf *io,
struct mg_coap_message *cm) {
if (io->len < sizeof(uint32_t)) {
cm->flags |= MG_COAP_NOT_ENOUGH_DATA;
return NULL;
}
/*
* Version (Ver): 2-bit unsigned integer. Indicates the CoAP version
* number. Implementations of this specification MUST set this field
* to 1 (01 binary). Other values are reserved for future versions.
* Messages with unknown version numbers MUST be silently ignored.
*/
if (((uint8_t) *ptr >> 6) != 1) {
cm->flags |= MG_COAP_IGNORE;
return NULL;
}
/*
* Type (T): 2-bit unsigned integer. Indicates if this message is of
* type Confirmable (0), Non-confirmable (1), Acknowledgement (2), or
* Reset (3).
*/
cm->msg_type = ((uint8_t) *ptr & 0x30) >> 4;
cm->flags |= MG_COAP_MSG_TYPE_FIELD;
/*
* Token Length (TKL): 4-bit unsigned integer. Indicates the length of
* the variable-length Token field (0-8 bytes). Lengths 9-15 are
* reserved, MUST NOT be sent, and MUST be processed as a message
* format error.
*/
cm->token.len = *ptr & 0x0F;
if (cm->token.len > 8) {
cm->flags |= MG_COAP_FORMAT_ERROR;
return NULL;
}
ptr++;
/*
* Code: 8-bit unsigned integer, split into a 3-bit class (most
* significant bits) and a 5-bit detail (least significant bits)
*/
cm->code_class = (uint8_t) *ptr >> 5;
cm->code_detail = *ptr & 0x1F;
cm->flags |= (MG_COAP_CODE_CLASS_FIELD | MG_COAP_CODE_DETAIL_FIELD);
ptr++;
/* Message ID: 16-bit unsigned integer in network byte order. */
cm->msg_id = (uint8_t) *ptr << 8 | (uint8_t) * (ptr + 1);
cm->flags |= MG_COAP_MSG_ID_FIELD;
ptr += 2;
return ptr;
}
/*
* Fills token information in mg_coap_message.
*
* Helper function.
*/
static char *coap_get_token(char *ptr, struct mbuf *io,
struct mg_coap_message *cm) {
if (cm->token.len != 0) {
if (ptr + cm->token.len > io->buf + io->len) {
cm->flags |= MG_COAP_NOT_ENOUGH_DATA;
return NULL;
} else {
cm->token.p = ptr;
ptr += cm->token.len;
cm->flags |= MG_COAP_TOKEN_FIELD;
}
}
return ptr;
}
/*
* Returns Option Delta or Length.
*
* Helper function.
*/
static int coap_get_ext_opt(char *ptr, struct mbuf *io, uint16_t *opt_info) {
int ret = 0;
if (*opt_info == 13) {
/*
* 13: An 8-bit unsigned integer follows the initial byte and
* indicates the Option Delta/Length minus 13.
*/
if (ptr < io->buf + io->len) {
*opt_info = (uint8_t) *ptr + 13;
ret = sizeof(uint8_t);
} else {
ret = -1; /* LCOV_EXCL_LINE */
}
} else if (*opt_info == 14) {
/*
* 14: A 16-bit unsigned integer in network byte order follows the
* initial byte and indicates the Option Delta/Length minus 269.
*/
if (ptr + sizeof(uint8_t) < io->buf + io->len) {
*opt_info = ((uint8_t) *ptr << 8 | (uint8_t) * (ptr + 1)) + 269;
ret = sizeof(uint16_t);
} else {
ret = -1; /* LCOV_EXCL_LINE */
}
}
return ret;
}
/*
* Fills options in mg_coap_message.
*
* Helper function.
*
* General options format:
* +---------------+---------------+
* | Option Delta | Option Length | 1 byte
* +---------------+---------------+
* \ Option Delta (extended) \ 0-2 bytes
* +-------------------------------+
* / Option Length (extended) \ 0-2 bytes
* +-------------------------------+
* \ Option Value \ 0 or more bytes
* +-------------------------------+
*/
static char *coap_get_options(char *ptr, struct mbuf *io,
struct mg_coap_message *cm) {
uint16_t prev_opt = 0;
if (ptr == io->buf + io->len) {
/* end of packet, ok */
return NULL;
}
/* 0xFF is payload marker */
while (ptr < io->buf + io->len && (uint8_t) *ptr != 0xFF) {
uint16_t option_delta, option_lenght;
int optinfo_len;
/* Option Delta: 4-bit unsigned integer */
option_delta = ((uint8_t) *ptr & 0xF0) >> 4;
/* Option Length: 4-bit unsigned integer */
option_lenght = *ptr & 0x0F;
if (option_delta == 15 || option_lenght == 15) {
/*
* 15: Reserved for future use. If the field is set to this value,
* it MUST be processed as a message format error
*/
cm->flags |= MG_COAP_FORMAT_ERROR;
break;
}
ptr++;
/* check for extended option delta */
optinfo_len = coap_get_ext_opt(ptr, io, &option_delta);
if (optinfo_len == -1) {
cm->flags |= MG_COAP_NOT_ENOUGH_DATA; /* LCOV_EXCL_LINE */
break; /* LCOV_EXCL_LINE */
}
ptr += optinfo_len;
/* check or extended option lenght */
optinfo_len = coap_get_ext_opt(ptr, io, &option_lenght);
if (optinfo_len == -1) {
cm->flags |= MG_COAP_NOT_ENOUGH_DATA; /* LCOV_EXCL_LINE */
break; /* LCOV_EXCL_LINE */
}
ptr += optinfo_len;
/*
* Instead of specifying the Option Number directly, the instances MUST
* appear in order of their Option Numbers and a delta encoding is used
* between them.
*/
option_delta += prev_opt;
mg_coap_add_option(cm, option_delta, ptr, option_lenght);
prev_opt = option_delta;
if (ptr + option_lenght > io->buf + io->len) {
cm->flags |= MG_COAP_NOT_ENOUGH_DATA; /* LCOV_EXCL_LINE */
break; /* LCOV_EXCL_LINE */
}
ptr += option_lenght;
}
if ((cm->flags & MG_COAP_ERROR) != 0) {
mg_coap_free_options(cm);
return NULL;
}
cm->flags |= MG_COAP_OPTIOMG_FIELD;
if (ptr == io->buf + io->len) {
/* end of packet, ok */
return NULL;
}
ptr++;
return ptr;
}
uint32_t mg_coap_parse(struct mbuf *io, struct mg_coap_message *cm) {
char *ptr;
memset(cm, 0, sizeof(*cm));
if ((ptr = coap_parse_header(io->buf, io, cm)) == NULL) {
return cm->flags;
}
if ((ptr = coap_get_token(ptr, io, cm)) == NULL) {
return cm->flags;
}
if ((ptr = coap_get_options(ptr, io, cm)) == NULL) {
return cm->flags;
}
/* the rest is payload */
cm->payload.len = io->len - (ptr - io->buf);
if (cm->payload.len != 0) {
cm->payload.p = ptr;
cm->flags |= MG_COAP_PAYLOAD_FIELD;
}
return cm->flags;
}
/*
* Calculates extended size of given Opt Number/Length in coap message.
*
* Helper function.
*/
static size_t coap_get_ext_opt_size(uint32_t value) {
int ret = 0;
if (value >= 13 && value <= 0xFF + 13) {
ret = sizeof(uint8_t);
} else if (value > 0xFF + 13 && value <= 0xFFFF + 269) {
ret = sizeof(uint16_t);
}
return ret;
}
/*
* Splits given Opt Number/Length into base and ext values.
*
* Helper function.
*/
static int coap_split_opt(uint32_t value, uint8_t *base, uint16_t *ext) {
int ret = 0;
if (value < 13) {
*base = value;
} else if (value >= 13 && value <= 0xFF + 13) {
*base = 13;
*ext = value - 13;
ret = sizeof(uint8_t);
} else if (value > 0xFF + 13 && value <= 0xFFFF + 269) {
*base = 14;
*ext = value - 269;
ret = sizeof(uint16_t);
}
return ret;
}
/*
* Puts uint16_t (in network order) into given char stream.
*
* Helper function.
*/
static char *coap_add_uint16(char *ptr, uint16_t val) {
*ptr = val >> 8;
ptr++;
*ptr = val & 0x00FF;
ptr++;
return ptr;
}
/*
* Puts extended value of Opt Number/Length into given char stream.
*
* Helper function.
*/
static char *coap_add_opt_info(char *ptr, uint16_t val, size_t len) {
if (len == sizeof(uint8_t)) {
*ptr = (char) val;
ptr++;
} else if (len == sizeof(uint16_t)) {
ptr = coap_add_uint16(ptr, val);
}
return ptr;
}
/*
* Verifies given mg_coap_message and calculates message size for it.
*
* Helper function.
*/
static uint32_t coap_calculate_packet_size(struct mg_coap_message *cm,
size_t *len) {
struct mg_coap_option *opt;
uint32_t prev_opt_number;
*len = 4; /* header */
if (cm->msg_type > MG_COAP_MSG_MAX) {
return MG_COAP_ERROR | MG_COAP_MSG_TYPE_FIELD;
}
if (cm->token.len > 8) {
return MG_COAP_ERROR | MG_COAP_TOKEN_FIELD;
}
if (cm->code_class > 7) {
return MG_COAP_ERROR | MG_COAP_CODE_CLASS_FIELD;
}
if (cm->code_detail > 31) {
return MG_COAP_ERROR | MG_COAP_CODE_DETAIL_FIELD;
}
*len += cm->token.len;
if (cm->payload.len != 0) {
*len += cm->payload.len + 1; /* ... + 1; add payload marker */
}
opt = cm->options;
prev_opt_number = 0;
while (opt != NULL) {
*len += 1; /* basic delta/length */
*len += coap_get_ext_opt_size(opt->number - prev_opt_number);
*len += coap_get_ext_opt_size((uint32_t) opt->value.len);
/*
* Current implementation performs check if
* option_number > previous option_number and produces an error
* TODO(alashkin): write design doc with limitations
* May be resorting is more suitable solution.
*/
if ((opt->next != NULL && opt->number > opt->next->number) ||
opt->value.len > 0xFFFF + 269 ||
opt->number - prev_opt_number > 0xFFFF + 269) {
return MG_COAP_ERROR | MG_COAP_OPTIOMG_FIELD;
}
*len += opt->value.len;
prev_opt_number = opt->number;
opt = opt->next;
}
return 0;
}
uint32_t mg_coap_compose(struct mg_coap_message *cm, struct mbuf *io) {
struct mg_coap_option *opt;
uint32_t res, prev_opt_number;
size_t prev_io_len, packet_size;
char *ptr;
res = coap_calculate_packet_size(cm, &packet_size);
if (res != 0) {
return res;
}
/* saving previous lenght to handle non-empty mbuf */
prev_io_len = io->len;
if (mbuf_append(io, NULL, packet_size) == 0) return MG_COAP_ERROR;
ptr = io->buf + prev_io_len;
/*
* since cm is verified, it is possible to use bits shift operator
* without additional zeroing of unused bits
*/
/* ver: 2 bits, msg_type: 2 bits, toklen: 4 bits */
*ptr = (1 << 6) | (cm->msg_type << 4) | (uint8_t)(cm->token.len);
ptr++;
/* code class: 3 bits, code detail: 5 bits */
*ptr = (cm->code_class << 5) | (cm->code_detail);
ptr++;
ptr = coap_add_uint16(ptr, cm->msg_id);
if (cm->token.len != 0) {
memcpy(ptr, cm->token.p, cm->token.len);
ptr += cm->token.len;
}
opt = cm->options;
prev_opt_number = 0;
while (opt != NULL) {
uint8_t delta_base = 0, length_base = 0;
uint16_t delta_ext = 0, length_ext = 0;
size_t opt_delta_len =
coap_split_opt(opt->number - prev_opt_number, &delta_base, &delta_ext);
size_t opt_lenght_len =
coap_split_opt((uint32_t) opt->value.len, &length_base, &length_ext);
*ptr = (delta_base << 4) | length_base;
ptr++;
ptr = coap_add_opt_info(ptr, delta_ext, opt_delta_len);
ptr = coap_add_opt_info(ptr, length_ext, opt_lenght_len);
if (opt->value.len != 0) {
memcpy(ptr, opt->value.p, opt->value.len);
ptr += opt->value.len;
}
prev_opt_number = opt->number;
opt = opt->next;
}
if (cm->payload.len != 0) {
*ptr = (char) -1;
ptr++;
memcpy(ptr, cm->payload.p, cm->payload.len);
}
return 0;
}
uint32_t mg_coap_send_message(struct mg_connection *nc,
struct mg_coap_message *cm) {
struct mbuf packet_out;
uint32_t compose_res;
mbuf_init(&packet_out, 0);
compose_res = mg_coap_compose(cm, &packet_out);
if (compose_res != 0) {
return compose_res; /* LCOV_EXCL_LINE */
}
mg_send(nc, packet_out.buf, (int) packet_out.len);
mbuf_free(&packet_out);
return 0;
}
uint32_t mg_coap_send_ack(struct mg_connection *nc, uint16_t msg_id) {
struct mg_coap_message cm;
memset(&cm, 0, sizeof(cm));
cm.msg_type = MG_COAP_MSG_ACK;
cm.msg_id = msg_id;
return mg_coap_send_message(nc, &cm);
}
static void coap_handler(struct mg_connection *nc, int ev,
void *ev_data MG_UD_ARG(void *user_data)) {
struct mbuf *io = &nc->recv_mbuf;
struct mg_coap_message cm;
uint32_t parse_res;
memset(&cm, 0, sizeof(cm));
nc->handler(nc, ev, ev_data MG_UD_ARG(user_data));
switch (ev) {
case MG_EV_RECV:
parse_res = mg_coap_parse(io, &cm);
if ((parse_res & MG_COAP_IGNORE) == 0) {
if ((cm.flags & MG_COAP_NOT_ENOUGH_DATA) != 0) {
/*
* Since we support UDP only
* MG_COAP_NOT_ENOUGH_DATA == MG_COAP_FORMAT_ERROR
*/
cm.flags |= MG_COAP_FORMAT_ERROR; /* LCOV_EXCL_LINE */
} /* LCOV_EXCL_LINE */
nc->handler(nc, MG_COAP_EVENT_BASE + cm.msg_type,
&cm MG_UD_ARG(user_data));
}
mg_coap_free_options(&cm);
mbuf_remove(io, io->len);
break;
}
}
/*
* Attach built-in CoAP event handler to the given connection.
*
* The user-defined event handler will receive following extra events:
*
* - MG_EV_COAP_CON
* - MG_EV_COAP_NOC
* - MG_EV_COAP_ACK
* - MG_EV_COAP_RST
*/
int mg_set_protocol_coap(struct mg_connection *nc) {
/* supports UDP only */
if ((nc->flags & MG_F_UDP) == 0) {
return -1;
}
nc->proto_handler = coap_handler;
return 0;
}
#endif /* MG_ENABLE_COAP */
#ifdef MG_MODULE_LINES
#line 1 "src/mg_sntp.c"
#endif
/* Amalgamated: #include "mg_internal.h" */
/* Amalgamated: #include "mg_sntp.h" */
/* Amalgamated: #include "mg_util.h" */
#if MG_ENABLE_SNTP
#define SNTP_TIME_OFFSET 2208988800
#ifndef SNTP_TIMEOUT
#define SNTP_TIMEOUT 10
#endif
#ifndef SNTP_ATTEMPTS
#define SNTP_ATTEMPTS 3
#endif
static uint64_t mg_get_sec(uint64_t val) {
return (val & 0xFFFFFFFF00000000) >> 32;
}
static uint64_t mg_get_usec(uint64_t val) {
uint64_t tmp = (val & 0x00000000FFFFFFFF);
tmp *= 1000000;
tmp >>= 32;
return tmp;
}
static void mg_ntp_to_tv(uint64_t val, struct timeval *tv) {
uint64_t tmp;
tmp = mg_get_sec(val);
tmp -= SNTP_TIME_OFFSET;
tv->tv_sec = tmp;
tv->tv_usec = mg_get_usec(val);
}
static void mg_get_ntp_ts(const char *ntp, uint64_t *val) {
uint32_t tmp;
memcpy(&tmp, ntp, sizeof(tmp));
tmp = ntohl(tmp);
*val = (uint64_t) tmp << 32;
memcpy(&tmp, ntp + 4, sizeof(tmp));
tmp = ntohl(tmp);
*val |= tmp;
}
void mg_sntp_send_request(struct mg_connection *c) {
uint8_t buf[48] = {0};
/*
* header - 8 bit:
* LI (2 bit) - 3 (not in sync), VN (3 bit) - 4 (version),
* mode (3 bit) - 3 (client)
*/
buf[0] = (3 << 6) | (4 << 3) | 3;
/*
* Next fields should be empty in client request
* stratum, 8 bit
* poll interval, 8 bit
* rrecision, 8 bit
* root delay, 32 bit
* root dispersion, 32 bit
* ref id, 32 bit
* ref timestamp, 64 bit
* originate Timestamp, 64 bit
* receive Timestamp, 64 bit
*/
/*
* convert time to sntp format (sntp starts from 00:00:00 01.01.1900)
* according to rfc868 it is 2208988800L sec
* this information is used to correct roundtrip delay
* but if local clock is absolutely broken (and doesn't work even
* as simple timer), it is better to disable it
*/
#ifndef MG_SNTP_NO_DELAY_CORRECTION
uint32_t sec;
sec = htonl((uint32_t)(mg_time() + SNTP_TIME_OFFSET));
memcpy(&buf[40], &sec, sizeof(sec));
#endif
mg_send(c, buf, sizeof(buf));
}
#ifndef MG_SNTP_NO_DELAY_CORRECTION
static uint64_t mg_calculate_delay(uint64_t t1, uint64_t t2, uint64_t t3) {
/* roundloop delay = (T4 - T1) - (T3 - T2) */
uint64_t d1 = ((mg_time() + SNTP_TIME_OFFSET) * 1000000) -
(mg_get_sec(t1) * 1000000 + mg_get_usec(t1));
uint64_t d2 = (mg_get_sec(t3) * 1000000 + mg_get_usec(t3)) -
(mg_get_sec(t2) * 1000000 + mg_get_usec(t2));
return (d1 > d2) ? d1 - d2 : 0;
}
#endif
MG_INTERNAL int mg_sntp_parse_reply(const char *buf, int len,
struct mg_sntp_message *msg) {
uint8_t hdr;
uint64_t trsm_ts_T3, delay = 0;
int mode;
struct timeval tv;
if (len < 48) {
return -1;
}
hdr = buf[0];
if ((hdr & 0x38) >> 3 != 4) {
/* Wrong version */
return -1;
}
mode = hdr & 0x7;
if (mode != 4 && mode != 5) {
/* Not a server reply */
return -1;
}
memset(msg, 0, sizeof(*msg));
msg->kiss_of_death = (buf[1] == 0); /* Server asks to not send requests */
mg_get_ntp_ts(&buf[40], &trsm_ts_T3);
#ifndef MG_SNTP_NO_DELAY_CORRECTION
{
uint64_t orig_ts_T1, recv_ts_T2;
mg_get_ntp_ts(&buf[24], &orig_ts_T1);
mg_get_ntp_ts(&buf[32], &recv_ts_T2);
delay = mg_calculate_delay(orig_ts_T1, recv_ts_T2, trsm_ts_T3);
}
#endif
mg_ntp_to_tv(trsm_ts_T3, &tv);
msg->time = (double) tv.tv_sec + (((double) tv.tv_usec + delay) / 1000000.0);
return 0;
}
static void mg_sntp_handler(struct mg_connection *c, int ev,
void *ev_data MG_UD_ARG(void *user_data)) {
struct mbuf *io = &c->recv_mbuf;
struct mg_sntp_message msg;
c->handler(c, ev, ev_data MG_UD_ARG(user_data));
switch (ev) {
case MG_EV_RECV: {
if (mg_sntp_parse_reply(io->buf, io->len, &msg) < 0) {
DBG(("Invalid SNTP packet received (%d)", (int) io->len));
c->handler(c, MG_SNTP_MALFORMED_REPLY, NULL MG_UD_ARG(user_data));
} else {
c->handler(c, MG_SNTP_REPLY, (void *) &msg MG_UD_ARG(user_data));
}
mbuf_remove(io, io->len);
break;
}
}
}
int mg_set_protocol_sntp(struct mg_connection *c) {
if ((c->flags & MG_F_UDP) == 0) {
return -1;
}
c->proto_handler = mg_sntp_handler;
return 0;
}
struct mg_connection *mg_sntp_connect(struct mg_mgr *mgr,
MG_CB(mg_event_handler_t event_handler,
void *user_data),
const char *sntp_server_name) {
struct mg_connection *c = NULL;
char url[100], *p_url = url;
const char *proto = "", *port = "", *tmp;
/* If port is not specified, use default (123) */
tmp = strchr(sntp_server_name, ':');
if (tmp != NULL && *(tmp + 1) == '/') {
tmp = strchr(tmp + 1, ':');
}
if (tmp == NULL) {
port = ":123";
}
/* Add udp:// if needed */
if (strncmp(sntp_server_name, "udp://", 6) != 0) {
proto = "udp://";
}
mg_asprintf(&p_url, sizeof(url), "%s%s%s", proto, sntp_server_name, port);
c = mg_connect(mgr, p_url, event_handler MG_UD_ARG(user_data));
if (c == NULL) {
goto cleanup;
}
mg_set_protocol_sntp(c);
cleanup:
if (p_url != url) {
MG_FREE(p_url);
}
return c;
}
struct sntp_data {
mg_event_handler_t hander;
int count;
};
static void mg_sntp_util_ev_handler(struct mg_connection *c, int ev,
void *ev_data MG_UD_ARG(void *user_data)) {
#if !MG_ENABLE_CALLBACK_USERDATA
void *user_data = c->user_data;
#endif
struct sntp_data *sd = (struct sntp_data *) user_data;
switch (ev) {
case MG_EV_CONNECT:
if (*(int *) ev_data != 0) {
mg_call(c, sd->hander, c->user_data, MG_SNTP_FAILED, NULL);
break;
}
/* fallthrough */
case MG_EV_TIMER:
if (sd->count <= SNTP_ATTEMPTS) {
mg_sntp_send_request(c);
mg_set_timer(c, mg_time() + 10);
sd->count++;
} else {
mg_call(c, sd->hander, c->user_data, MG_SNTP_FAILED, NULL);
c->flags |= MG_F_CLOSE_IMMEDIATELY;
}
break;
case MG_SNTP_MALFORMED_REPLY:
mg_call(c, sd->hander, c->user_data, MG_SNTP_FAILED, NULL);
c->flags |= MG_F_CLOSE_IMMEDIATELY;
break;
case MG_SNTP_REPLY:
mg_call(c, sd->hander, c->user_data, MG_SNTP_REPLY, ev_data);
c->flags |= MG_F_CLOSE_IMMEDIATELY;
break;
case MG_EV_CLOSE:
MG_FREE(user_data);
c->user_data = NULL;
break;
}
}
struct mg_connection *mg_sntp_get_time(struct mg_mgr *mgr,
mg_event_handler_t event_handler,
const char *sntp_server_name) {
struct mg_connection *c;
struct sntp_data *sd = (struct sntp_data *) MG_CALLOC(1, sizeof(*sd));
if (sd == NULL) {
return NULL;
}
c = mg_sntp_connect(mgr, MG_CB(mg_sntp_util_ev_handler, sd),
sntp_server_name);
if (c == NULL) {
MG_FREE(sd);
return NULL;
}
sd->hander = event_handler;
#if !MG_ENABLE_CALLBACK_USERDATA
c->user_data = sd;
#endif
return c;
}
#endif /* MG_ENABLE_SNTP */
#ifdef MG_MODULE_LINES
#line 1 "src/mg_socks.c"
#endif
#if MG_ENABLE_SOCKS
/* Amalgamated: #include "mg_socks.h" */
/* Amalgamated: #include "mg_internal.h" */
/*
* https://www.ietf.org/rfc/rfc1928.txt paragraph 3, handle client handshake
*
* +----+----------+----------+
* |VER | NMETHODS | METHODS |
* +----+----------+----------+
* | 1 | 1 | 1 to 255 |
* +----+----------+----------+
*/
static void mg_socks5_handshake(struct mg_connection *c) {
struct mbuf *r = &c->recv_mbuf;
if (r->buf[0] != MG_SOCKS_VERSION) {
c->flags |= MG_F_CLOSE_IMMEDIATELY;
} else if (r->len > 2 && (size_t) r->buf[1] + 2 <= r->len) {
/* https://www.ietf.org/rfc/rfc1928.txt paragraph 3 */
unsigned char reply[2] = {MG_SOCKS_VERSION, MG_SOCKS_HANDSHAKE_FAILURE};
int i;
for (i = 2; i < r->buf[1] + 2; i++) {
/* TODO(lsm): support other auth methods */
if (r->buf[i] == MG_SOCKS_HANDSHAKE_NOAUTH) reply[1] = r->buf[i];
}
mbuf_remove(r, 2 + r->buf[1]);
mg_send(c, reply, sizeof(reply));
c->flags |= MG_SOCKS_HANDSHAKE_DONE; /* Mark handshake done */
}
}
static void disband(struct mg_connection *c) {
struct mg_connection *c2 = (struct mg_connection *) c->user_data;
if (c2 != NULL) {
c2->flags |= MG_F_SEND_AND_CLOSE;
c2->user_data = NULL;
}
c->flags |= MG_F_SEND_AND_CLOSE;
c->user_data = NULL;
}
static void relay_data(struct mg_connection *c) {
struct mg_connection *c2 = (struct mg_connection *) c->user_data;
if (c2 != NULL) {
mg_send(c2, c->recv_mbuf.buf, c->recv_mbuf.len);
mbuf_remove(&c->recv_mbuf, c->recv_mbuf.len);
} else {
c->flags |= MG_F_SEND_AND_CLOSE;
}
}
static void serv_ev_handler(struct mg_connection *c, int ev, void *ev_data) {
if (ev == MG_EV_CLOSE) {
disband(c);
} else if (ev == MG_EV_RECV) {
relay_data(c);
} else if (ev == MG_EV_CONNECT) {
int res = *(int *) ev_data;
if (res != 0) LOG(LL_ERROR, ("connect error: %d", res));
}
}
static void mg_socks5_connect(struct mg_connection *c, const char *addr) {
struct mg_connection *serv = mg_connect(c->mgr, addr, serv_ev_handler);
serv->user_data = c;
c->user_data = serv;
}
/*
* Request, https://www.ietf.org/rfc/rfc1928.txt paragraph 4
*
* +----+-----+-------+------+----------+----------+
* |VER | CMD | RSV | ATYP | DST.ADDR | DST.PORT |
* +----+-----+-------+------+----------+----------+
* | 1 | 1 | X'00' | 1 | Variable | 2 |
* +----+-----+-------+------+----------+----------+
*/
static void mg_socks5_handle_request(struct mg_connection *c) {
struct mbuf *r = &c->recv_mbuf;
unsigned char *p = (unsigned char *) r->buf;
unsigned char addr_len = 4, reply = MG_SOCKS_SUCCESS;
int ver, cmd, atyp;
char addr[300];
if (r->len < 8) return; /* return if not fully buffered. min DST.ADDR is 2 */
ver = p[0];
cmd = p[1];
atyp = p[3];
/* TODO(lsm): support other commands */
if (ver != MG_SOCKS_VERSION || cmd != MG_SOCKS_CMD_CONNECT) {
reply = MG_SOCKS_CMD_NOT_SUPPORTED;
} else if (atyp == MG_SOCKS_ADDR_IPV4) {
addr_len = 4;
if (r->len < (size_t) addr_len + 6) return; /* return if not buffered */
snprintf(addr, sizeof(addr), "%d.%d.%d.%d:%d", p[4], p[5], p[6], p[7],
p[8] << 8 | p[9]);
mg_socks5_connect(c, addr);
} else if (atyp == MG_SOCKS_ADDR_IPV6) {
addr_len = 16;
if (r->len < (size_t) addr_len + 6) return; /* return if not buffered */
snprintf(addr, sizeof(addr), "[%x:%x:%x:%x:%x:%x:%x:%x]:%d",
p[4] << 8 | p[5], p[6] << 8 | p[7], p[8] << 8 | p[9],
p[10] << 8 | p[11], p[12] << 8 | p[13], p[14] << 8 | p[15],
p[16] << 8 | p[17], p[18] << 8 | p[19], p[20] << 8 | p[21]);
mg_socks5_connect(c, addr);
} else if (atyp == MG_SOCKS_ADDR_DOMAIN) {
addr_len = p[4] + 1;
if (r->len < (size_t) addr_len + 6) return; /* return if not buffered */
snprintf(addr, sizeof(addr), "%.*s:%d", p[4], p + 5,
p[4 + addr_len] << 8 | p[4 + addr_len + 1]);
mg_socks5_connect(c, addr);
} else {
reply = MG_SOCKS_ADDR_NOT_SUPPORTED;
}
/*
* Reply, https://www.ietf.org/rfc/rfc1928.txt paragraph 5
*
* +----+-----+-------+------+----------+----------+
* |VER | REP | RSV | ATYP | BND.ADDR | BND.PORT |
* +----+-----+-------+------+----------+----------+
* | 1 | 1 | X'00' | 1 | Variable | 2 |
* +----+-----+-------+------+----------+----------+
*/
{
unsigned char buf[] = {MG_SOCKS_VERSION, reply, 0};
mg_send(c, buf, sizeof(buf));
}
mg_send(c, r->buf + 3, addr_len + 1 + 2);
mbuf_remove(r, 6 + addr_len); /* Remove request from the input stream */
c->flags |= MG_SOCKS_CONNECT_DONE; /* Mark ourselves as connected */
}
static void socks_handler(struct mg_connection *c, int ev, void *ev_data) {
if (ev == MG_EV_RECV) {
if (!(c->flags & MG_SOCKS_HANDSHAKE_DONE)) mg_socks5_handshake(c);
if (c->flags & MG_SOCKS_HANDSHAKE_DONE &&
!(c->flags & MG_SOCKS_CONNECT_DONE)) {
mg_socks5_handle_request(c);
}
if (c->flags & MG_SOCKS_CONNECT_DONE) relay_data(c);
} else if (ev == MG_EV_CLOSE) {
disband(c);
}
(void) ev_data;
}
void mg_set_protocol_socks(struct mg_connection *c) {
c->proto_handler = socks_handler;
}
#endif
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/cc3200/cc3200_libc.c"
#endif
#if CS_PLATFORM == CS_P_CC3200
/* Amalgamated: #include "common/mg_mem.h" */
#include
#include
#ifndef __TI_COMPILER_VERSION__
#include
#include
#include
#include
#endif
#include
#include
#include
#include
#include
#include
#include
#define CONSOLE_UART UARTA0_BASE
#ifdef __TI_COMPILER_VERSION__
int asprintf(char **strp, const char *fmt, ...) {
va_list ap;
int len;
*strp = MG_MALLOC(BUFSIZ);
if (*strp == NULL) return -1;
va_start(ap, fmt);
len = vsnprintf(*strp, BUFSIZ, fmt, ap);
va_end(ap);
if (len > 0) {
*strp = MG_REALLOC(*strp, len + 1);
if (*strp == NULL) return -1;
}
if (len >= BUFSIZ) {
va_start(ap, fmt);
len = vsnprintf(*strp, len + 1, fmt, ap);
va_end(ap);
}
return len;
}
#if MG_TI_NO_HOST_INTERFACE
time_t HOSTtime() {
struct timeval tp;
gettimeofday(&tp, NULL);
return tp.tv_sec;
}
#endif
#endif /* __TI_COMPILER_VERSION__ */
void fprint_str(FILE *fp, const char *str) {
while (*str != '\0') {
if (*str == '\n') MAP_UARTCharPut(CONSOLE_UART, '\r');
MAP_UARTCharPut(CONSOLE_UART, *str++);
}
}
void _exit(int status) {
fprint_str(stderr, "_exit\n");
/* cause an unaligned access exception, that will drop you into gdb */
*(int *) 1 = status;
while (1)
; /* avoid gcc warning because stdlib abort() has noreturn attribute */
}
void _not_implemented(const char *what) {
fprint_str(stderr, what);
fprint_str(stderr, " is not implemented\n");
_exit(42);
}
int _kill(int pid, int sig) {
(void) pid;
(void) sig;
_not_implemented("_kill");
return -1;
}
int _getpid() {
fprint_str(stderr, "_getpid is not implemented\n");
return 42;
}
int _isatty(int fd) {
/* 0, 1 and 2 are TTYs. */
return fd < 2;
}
#endif /* CS_PLATFORM == CS_P_CC3200 */
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/msp432/msp432_libc.c"
#endif
#if CS_PLATFORM == CS_P_MSP432
#include
#include
int gettimeofday(struct timeval *tp, void *tzp) {
uint32_t ticks = Clock_getTicks();
tp->tv_sec = ticks / 1000;
tp->tv_usec = (ticks % 1000) * 1000;
return 0;
}
#endif /* CS_PLATFORM == CS_P_MSP432 */
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/nrf5/nrf5_libc.c"
#endif
#if (CS_PLATFORM == CS_P_NRF51 || CS_PLATFORM == CS_P_NRF52) && \
defined(__ARMCC_VERSION)
int gettimeofday(struct timeval *tp, void *tzp) {
/* TODO */
tp->tv_sec = 0;
tp->tv_usec = 0;
return 0;
}
#endif
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/simplelink/sl_fs_slfs.h"
#endif
#ifndef CS_COMMON_PLATFORMS_SIMPLELINK_SL_FS_SLFS_H_
#define CS_COMMON_PLATFORMS_SIMPLELINK_SL_FS_SLFS_H_
#if defined(MG_FS_SLFS)
#include
#ifndef __TI_COMPILER_VERSION__
#include
#include
#endif
#define MAX_OPEN_SLFS_FILES 8
/* Indirect libc interface - same functions, different names. */
int fs_slfs_open(const char *pathname, int flags, mode_t mode);
int fs_slfs_close(int fd);
ssize_t fs_slfs_read(int fd, void *buf, size_t count);
ssize_t fs_slfs_write(int fd, const void *buf, size_t count);
int fs_slfs_stat(const char *pathname, struct stat *s);
int fs_slfs_fstat(int fd, struct stat *s);
off_t fs_slfs_lseek(int fd, off_t offset, int whence);
int fs_slfs_unlink(const char *filename);
int fs_slfs_rename(const char *from, const char *to);
void fs_slfs_set_file_size(const char *name, size_t size);
void fs_slfs_set_file_flags(const char *name, uint32_t flags, uint32_t *token);
void fs_slfs_unset_file_flags(const char *name);
#endif /* defined(MG_FS_SLFS) */
#endif /* CS_COMMON_PLATFORMS_SIMPLELINK_SL_FS_SLFS_H_ */
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/simplelink/sl_fs_slfs.c"
#endif
/* Standard libc interface to TI SimpleLink FS. */
#if defined(MG_FS_SLFS) || defined(CC3200_FS_SLFS)
/* Amalgamated: #include "common/platforms/simplelink/sl_fs_slfs.h" */
#include
#if CS_PLATFORM == CS_P_CC3200
#include
#endif
/* Amalgamated: #include "common/cs_dbg.h" */
/* Amalgamated: #include "common/mg_mem.h" */
#if SL_MAJOR_VERSION_NUM < 2
int slfs_open(const unsigned char *fname, uint32_t flags, uint32_t *token) {
_i32 fh;
_i32 r = sl_FsOpen(fname, flags, (unsigned long *) token, &fh);
return (r < 0 ? r : fh);
}
#else /* SL_MAJOR_VERSION_NUM >= 2 */
int slfs_open(const unsigned char *fname, uint32_t flags, uint32_t *token) {
return sl_FsOpen(fname, flags, (unsigned long *) token);
}
#endif
/* From sl_fs.c */
int set_errno(int e);
const char *drop_dir(const char *fname, bool *is_slfs);
/*
* With SLFS, you have to pre-declare max file size. Yes. Really.
* 64K should be enough for everyone. Right?
*/
#ifndef FS_SLFS_MAX_FILE_SIZE
#define FS_SLFS_MAX_FILE_SIZE (64 * 1024)
#endif
struct sl_file_open_info {
char *name;
size_t size;
uint32_t flags;
uint32_t *token;
};
struct sl_fd_info {
_i32 fh;
_off_t pos;
size_t size;
};
static struct sl_fd_info s_sl_fds[MAX_OPEN_SLFS_FILES];
static struct sl_file_open_info s_sl_file_open_infos[MAX_OPEN_SLFS_FILES];
static struct sl_file_open_info *fs_slfs_find_foi(const char *name,
bool create);
static int sl_fs_to_errno(_i32 r) {
DBG(("SL error: %d", (int) r));
switch (r) {
case SL_FS_OK:
return 0;
case SL_ERROR_FS_FILE_NAME_EXIST:
return EEXIST;
case SL_ERROR_FS_WRONG_FILE_NAME:
return EINVAL;
case SL_ERROR_FS_NO_AVAILABLE_NV_INDEX:
case SL_ERROR_FS_NOT_ENOUGH_STORAGE_SPACE:
return ENOSPC;
case SL_ERROR_FS_FAILED_TO_ALLOCATE_MEM:
return ENOMEM;
case SL_ERROR_FS_FILE_NOT_EXISTS:
return ENOENT;
case SL_ERROR_FS_NOT_SUPPORTED:
return ENOTSUP;
}
return ENXIO;
}
int fs_slfs_open(const char *pathname, int flags, mode_t mode) {
int fd;
for (fd = 0; fd < MAX_OPEN_SLFS_FILES; fd++) {
if (s_sl_fds[fd].fh <= 0) break;
}
if (fd >= MAX_OPEN_SLFS_FILES) return set_errno(ENOMEM);
struct sl_fd_info *fi = &s_sl_fds[fd];
/*
* Apply path manipulations again, in case we got here directly
* (via TI libc's "add_device").
*/
pathname = drop_dir(pathname, NULL);
_u32 am = 0;
fi->size = (size_t) -1;
int rw = (flags & 3);
size_t new_size = 0;
struct sl_file_open_info *foi =
fs_slfs_find_foi(pathname, false /* create */);
if (foi != NULL) {
LOG(LL_DEBUG, ("FOI for %s: %d 0x%x %p", pathname, (int) foi->size,
(unsigned int) foi->flags, (void*)foi->token));
}
if (rw == O_RDONLY) {
SlFsFileInfo_t sl_fi;
_i32 r = sl_FsGetInfo((const _u8 *) pathname, 0, &sl_fi);
if (r == SL_FS_OK) {
fi->size = SL_FI_FILE_SIZE(sl_fi);
}
am = SL_FS_READ;
} else {
if (!(flags & O_TRUNC) || (flags & O_APPEND)) {
// FailFS files cannot be opened for append and will be truncated
// when opened for write.
return set_errno(ENOTSUP);
}
if (flags & O_CREAT) {
if (foi->size > 0) {
new_size = foi->size;
} else {
new_size = FS_SLFS_MAX_FILE_SIZE;
}
am = FS_MODE_OPEN_CREATE(new_size, 0);
} else {
am = SL_FS_WRITE;
}
#if SL_MAJOR_VERSION_NUM >= 2
am |= SL_FS_OVERWRITE;
#endif
}
uint32_t *token = NULL;
if (foi != NULL) {
am |= foi->flags;
token = foi->token;
}
fi->fh = slfs_open((_u8 *) pathname, am, token);
LOG(LL_DEBUG, ("sl_FsOpen(%s, 0x%x, %p) sz %u = %d", pathname, (int) am,
(void*)token, (unsigned int) new_size, (int) fi->fh));
int r;
if (fi->fh >= 0) {
fi->pos = 0;
r = fd;
} else {
r = set_errno(sl_fs_to_errno(fi->fh));
}
return r;
}
int fs_slfs_close(int fd) {
struct sl_fd_info *fi = &s_sl_fds[fd];
if (fi->fh <= 0) return set_errno(EBADF);
_i32 r = sl_FsClose(fi->fh, NULL, NULL, 0);
LOG(LL_DEBUG, ("sl_FsClose(%d) = %d", (int) fi->fh, (int) r));
s_sl_fds[fd].fh = -1;
return set_errno(sl_fs_to_errno(r));
}
ssize_t fs_slfs_read(int fd, void *buf, size_t count) {
struct sl_fd_info *fi = &s_sl_fds[fd];
if (fi->fh <= 0) return set_errno(EBADF);
/* Simulate EOF. sl_FsRead @ file_size return SL_FS_ERR_OFFSET_OUT_OF_RANGE.
*/
if (fi->pos == fi->size) return 0;
_i32 r = sl_FsRead(fi->fh, fi->pos, buf, count);
DBG(("sl_FsRead(%d, %d, %d) = %d", (int) fi->fh, (int) fi->pos, (int) count,
(int) r));
if (r >= 0) {
fi->pos += r;
return r;
}
return set_errno(sl_fs_to_errno(r));
}
ssize_t fs_slfs_write(int fd, const void *buf, size_t count) {
struct sl_fd_info *fi = &s_sl_fds[fd];
if (fi->fh <= 0) return set_errno(EBADF);
_i32 r = sl_FsWrite(fi->fh, fi->pos, (_u8 *) buf, count);
DBG(("sl_FsWrite(%d, %d, %d) = %d", (int) fi->fh, (int) fi->pos, (int) count,
(int) r));
if (r >= 0) {
fi->pos += r;
return r;
}
return set_errno(sl_fs_to_errno(r));
}
int fs_slfs_stat(const char *pathname, struct stat *s) {
SlFsFileInfo_t sl_fi;
/*
* Apply path manipulations again, in case we got here directly
* (via TI libc's "add_device").
*/
pathname = drop_dir(pathname, NULL);
_i32 r = sl_FsGetInfo((const _u8 *) pathname, 0, &sl_fi);
if (r == SL_FS_OK) {
s->st_mode = S_IFREG | 0666;
s->st_nlink = 1;
s->st_size = SL_FI_FILE_SIZE(sl_fi);
return 0;
}
return set_errno(sl_fs_to_errno(r));
}
int fs_slfs_fstat(int fd, struct stat *s) {
struct sl_fd_info *fi = &s_sl_fds[fd];
if (fi->fh <= 0) return set_errno(EBADF);
s->st_mode = 0666;
s->st_mode = S_IFREG | 0666;
s->st_nlink = 1;
s->st_size = fi->size;
return 0;
}
off_t fs_slfs_lseek(int fd, off_t offset, int whence) {
if (s_sl_fds[fd].fh <= 0) return set_errno(EBADF);
switch (whence) {
case SEEK_SET:
s_sl_fds[fd].pos = offset;
break;
case SEEK_CUR:
s_sl_fds[fd].pos += offset;
break;
case SEEK_END:
return set_errno(ENOTSUP);
}
return 0;
}
int fs_slfs_unlink(const char *pathname) {
/*
* Apply path manipulations again, in case we got here directly
* (via TI libc's "add_device").
*/
pathname = drop_dir(pathname, NULL);
return set_errno(sl_fs_to_errno(sl_FsDel((const _u8 *) pathname, 0)));
}
int fs_slfs_rename(const char *from, const char *to) {
return set_errno(ENOTSUP);
}
static struct sl_file_open_info *fs_slfs_find_foi(const char *name,
bool create) {
int i = 0;
for (i = 0; i < MAX_OPEN_SLFS_FILES; i++) {
if (s_sl_file_open_infos[i].name != NULL &&
strcmp(drop_dir(s_sl_file_open_infos[i].name, NULL), name) == 0) {
break;
}
}
if (i != MAX_OPEN_SLFS_FILES) return &s_sl_file_open_infos[i];
if (!create) return NULL;
for (i = 0; i < MAX_OPEN_SLFS_FILES; i++) {
if (s_sl_file_open_infos[i].name == NULL) break;
}
if (i == MAX_OPEN_SLFS_FILES) {
i = 0; /* Evict a random slot. */
}
if (s_sl_file_open_infos[i].name != NULL) {
free(s_sl_file_open_infos[i].name);
}
s_sl_file_open_infos[i].name = strdup(name);
return &s_sl_file_open_infos[i];
}
void fs_slfs_set_file_size(const char *name, size_t size) {
struct sl_file_open_info *foi = fs_slfs_find_foi(name, true /* create */);
foi->size = size;
}
void fs_slfs_set_file_flags(const char *name, uint32_t flags, uint32_t *token) {
struct sl_file_open_info *foi = fs_slfs_find_foi(name, true /* create */);
foi->flags = flags;
foi->token = token;
}
void fs_slfs_unset_file_flags(const char *name) {
struct sl_file_open_info *foi = fs_slfs_find_foi(name, false /* create */);
if (foi == NULL) return;
free(foi->name);
memset(foi, 0, sizeof(*foi));
}
#endif /* defined(MG_FS_SLFS) || defined(CC3200_FS_SLFS) */
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/simplelink/sl_fs.c"
#endif
#if MG_NET_IF == MG_NET_IF_SIMPLELINK && \
(defined(MG_FS_SLFS) || defined(MG_FS_SPIFFS))
int set_errno(int e) {
errno = e;
return (e == 0 ? 0 : -1);
}
const char *drop_dir(const char *fname, bool *is_slfs) {
if (is_slfs != NULL) {
*is_slfs = (strncmp(fname, "SL:", 3) == 0);
if (*is_slfs) fname += 3;
}
/* Drop "./", if any */
if (fname[0] == '.' && fname[1] == '/') {
fname += 2;
}
/*
* Drop / if it is the only one in the path.
* This allows use of /pretend/directories but serves /file.txt as normal.
*/
if (fname[0] == '/' && strchr(fname + 1, '/') == NULL) {
fname++;
}
return fname;
}
#if !defined(MG_FS_NO_VFS)
#include
#include
#include
#include
#include
#ifdef __TI_COMPILER_VERSION__
#include
#endif
/* Amalgamated: #include "common/cs_dbg.h" */
/* Amalgamated: #include "common/platform.h" */
#ifdef CC3200_FS_SPIFFS
/* Amalgamated: #include "cc3200_fs_spiffs.h" */
#endif
#ifdef MG_FS_SLFS
/* Amalgamated: #include "sl_fs_slfs.h" */
#endif
#define NUM_SYS_FDS 3
#define SPIFFS_FD_BASE 10
#define SLFS_FD_BASE 100
#if !defined(MG_UART_CHAR_PUT) && !defined(MG_UART_WRITE)
#if CS_PLATFORM == CS_P_CC3200
#include
#include
#include
#include
#include
#define MG_UART_CHAR_PUT(fd, c) MAP_UARTCharPut(UARTA0_BASE, c);
#else
#define MG_UART_WRITE(fd, buf, len)
#endif /* CS_PLATFORM == CS_P_CC3200 */
#endif /* !MG_UART_CHAR_PUT */
enum fd_type {
FD_INVALID,
FD_SYS,
#ifdef CC3200_FS_SPIFFS
FD_SPIFFS,
#endif
#ifdef MG_FS_SLFS
FD_SLFS
#endif
};
static int fd_type(int fd) {
if (fd >= 0 && fd < NUM_SYS_FDS) return FD_SYS;
#ifdef CC3200_FS_SPIFFS
if (fd >= SPIFFS_FD_BASE && fd < SPIFFS_FD_BASE + MAX_OPEN_SPIFFS_FILES) {
return FD_SPIFFS;
}
#endif
#ifdef MG_FS_SLFS
if (fd >= SLFS_FD_BASE && fd < SLFS_FD_BASE + MAX_OPEN_SLFS_FILES) {
return FD_SLFS;
}
#endif
return FD_INVALID;
}
#if MG_TI_NO_HOST_INTERFACE
int open(const char *pathname, unsigned flags, int mode) {
#else
int _open(const char *pathname, int flags, mode_t mode) {
#endif
int fd = -1;
bool is_sl;
const char *fname = drop_dir(pathname, &is_sl);
if (is_sl) {
#ifdef MG_FS_SLFS
fd = fs_slfs_open(fname, flags, mode);
if (fd >= 0) fd += SLFS_FD_BASE;
#endif
} else {
#ifdef CC3200_FS_SPIFFS
fd = fs_spiffs_open(fname, flags, mode);
if (fd >= 0) fd += SPIFFS_FD_BASE;
#endif
}
LOG(LL_DEBUG,
("open(%s, 0x%x) = %d, fname = %s", pathname, flags, fd, fname));
return fd;
}
int _stat(const char *pathname, struct stat *st) {
int res = -1;
bool is_sl;
const char *fname = drop_dir(pathname, &is_sl);
memset(st, 0, sizeof(*st));
/* Simulate statting the root directory. */
if (fname[0] == '\0' || strcmp(fname, ".") == 0) {
st->st_ino = 0;
st->st_mode = S_IFDIR | 0777;
st->st_nlink = 1;
st->st_size = 0;
return 0;
}
if (is_sl) {
#ifdef MG_FS_SLFS
res = fs_slfs_stat(fname, st);
#endif
} else {
#ifdef CC3200_FS_SPIFFS
res = fs_spiffs_stat(fname, st);
#endif
}
LOG(LL_DEBUG, ("stat(%s) = %d; fname = %s", pathname, res, fname));
return res;
}
#if MG_TI_NO_HOST_INTERFACE
int close(int fd) {
#else
int _close(int fd) {
#endif
int r = -1;
switch (fd_type(fd)) {
case FD_INVALID:
r = set_errno(EBADF);
break;
case FD_SYS:
r = set_errno(EACCES);
break;
#ifdef CC3200_FS_SPIFFS
case FD_SPIFFS:
r = fs_spiffs_close(fd - SPIFFS_FD_BASE);
break;
#endif
#ifdef MG_FS_SLFS
case FD_SLFS:
r = fs_slfs_close(fd - SLFS_FD_BASE);
break;
#endif
}
DBG(("close(%d) = %d", fd, r));
return r;
}
#if MG_TI_NO_HOST_INTERFACE
off_t lseek(int fd, off_t offset, int whence) {
#else
off_t _lseek(int fd, off_t offset, int whence) {
#endif
int r = -1;
switch (fd_type(fd)) {
case FD_INVALID:
r = set_errno(EBADF);
break;
case FD_SYS:
r = set_errno(ESPIPE);
break;
#ifdef CC3200_FS_SPIFFS
case FD_SPIFFS:
r = fs_spiffs_lseek(fd - SPIFFS_FD_BASE, offset, whence);
break;
#endif
#ifdef MG_FS_SLFS
case FD_SLFS:
r = fs_slfs_lseek(fd - SLFS_FD_BASE, offset, whence);
break;
#endif
}
DBG(("lseek(%d, %d, %d) = %d", fd, (int) offset, whence, r));
return r;
}
int _fstat(int fd, struct stat *s) {
int r = -1;
memset(s, 0, sizeof(*s));
switch (fd_type(fd)) {
case FD_INVALID:
r = set_errno(EBADF);
break;
case FD_SYS: {
/* Create barely passable stats for STD{IN,OUT,ERR}. */
memset(s, 0, sizeof(*s));
s->st_ino = fd;
s->st_mode = S_IFCHR | 0666;
r = 0;
break;
}
#ifdef CC3200_FS_SPIFFS
case FD_SPIFFS:
r = fs_spiffs_fstat(fd - SPIFFS_FD_BASE, s);
break;
#endif
#ifdef MG_FS_SLFS
case FD_SLFS:
r = fs_slfs_fstat(fd - SLFS_FD_BASE, s);
break;
#endif
}
DBG(("fstat(%d) = %d", fd, r));
return r;
}
#if MG_TI_NO_HOST_INTERFACE
int read(int fd, char *buf, unsigned count) {
#else
ssize_t _read(int fd, void *buf, size_t count) {
#endif
int r = -1;
switch (fd_type(fd)) {
case FD_INVALID:
r = set_errno(EBADF);
break;
case FD_SYS: {
if (fd != 0) {
r = set_errno(EACCES);
break;
}
/* Should we allow reading from stdin = uart? */
r = set_errno(ENOTSUP);
break;
}
#ifdef CC3200_FS_SPIFFS
case FD_SPIFFS:
r = fs_spiffs_read(fd - SPIFFS_FD_BASE, buf, count);
break;
#endif
#ifdef MG_FS_SLFS
case FD_SLFS:
r = fs_slfs_read(fd - SLFS_FD_BASE, buf, count);
break;
#endif
}
DBG(("read(%d, %u) = %d", fd, count, r));
return r;
}
#if MG_TI_NO_HOST_INTERFACE
int write(int fd, const char *buf, unsigned count) {
#else
ssize_t _write(int fd, const void *buf, size_t count) {
#endif
int r = -1;
switch (fd_type(fd)) {
case FD_INVALID:
r = set_errno(EBADF);
break;
case FD_SYS: {
if (fd == 0) {
r = set_errno(EACCES);
break;
}
#ifdef MG_UART_WRITE
MG_UART_WRITE(fd, buf, count);
#elif defined(MG_UART_CHAR_PUT)
{
size_t i;
for (i = 0; i < count; i++) {
const char c = ((const char *) buf)[i];
if (c == '\n') MG_UART_CHAR_PUT(fd, '\r');
MG_UART_CHAR_PUT(fd, c);
}
}
#endif
r = count;
break;
}
#ifdef CC3200_FS_SPIFFS
case FD_SPIFFS:
r = fs_spiffs_write(fd - SPIFFS_FD_BASE, buf, count);
break;
#endif
#ifdef MG_FS_SLFS
case FD_SLFS:
r = fs_slfs_write(fd - SLFS_FD_BASE, buf, count);
break;
#endif
}
return r;
}
/*
* On Newlib we override rename directly too, because the default
* implementation using _link and _unlink doesn't work for us.
*/
#if MG_TI_NO_HOST_INTERFACE || defined(_NEWLIB_VERSION)
int rename(const char *frompath, const char *topath) {
int r = -1;
bool is_sl_from, is_sl_to;
const char *from = drop_dir(frompath, &is_sl_from);
const char *to = drop_dir(topath, &is_sl_to);
if (is_sl_from || is_sl_to) {
set_errno(ENOTSUP);
} else {
#ifdef CC3200_FS_SPIFFS
r = fs_spiffs_rename(from, to);
#endif
}
DBG(("rename(%s, %s) = %d", from, to, r));
return r;
}
#endif /* MG_TI_NO_HOST_INTERFACE || defined(_NEWLIB_VERSION) */
#if MG_TI_NO_HOST_INTERFACE
int unlink(const char *pathname) {
#else
int _unlink(const char *pathname) {
#endif
int r = -1;
bool is_sl;
const char *fname = drop_dir(pathname, &is_sl);
if (is_sl) {
#ifdef MG_FS_SLFS
r = fs_slfs_unlink(fname);
#endif
} else {
#ifdef CC3200_FS_SPIFFS
r = fs_spiffs_unlink(fname);
#endif
}
DBG(("unlink(%s) = %d, fname = %s", pathname, r, fname));
return r;
}
#ifdef CC3200_FS_SPIFFS /* FailFS does not support listing files. */
DIR *opendir(const char *dir_name) {
DIR *r = NULL;
bool is_sl;
drop_dir(dir_name, &is_sl);
if (is_sl) {
r = NULL;
set_errno(ENOTSUP);
} else {
r = fs_spiffs_opendir(dir_name);
}
DBG(("opendir(%s) = %p", dir_name, (void*)r));
return r;
}
struct dirent *readdir(DIR *dir) {
struct dirent *res = fs_spiffs_readdir(dir);
DBG(("readdir(%p) = %p", (void*)dir, (void*)res));
return res;
}
int closedir(DIR *dir) {
int res = fs_spiffs_closedir(dir);
DBG(("closedir(%p) = %d", (void*)dir, res));
return res;
}
int rmdir(const char *path) {
return fs_spiffs_rmdir(path);
}
int mkdir(const char *path, mode_t mode) {
(void) path;
(void) mode;
/* for spiffs supports only root dir, which comes from mongoose as '.' */
return (strlen(path) == 1 && *path == '.') ? 0 : ENOTDIR;
}
#endif
int sl_fs_init(void) {
int ret = 1;
#ifdef __TI_COMPILER_VERSION__
#ifdef MG_FS_SLFS
#pragma diag_push
#pragma diag_suppress 169 /* Nothing we can do about the prototype mismatch. \
*/
ret = (add_device("SL", _MSA, fs_slfs_open, fs_slfs_close, fs_slfs_read,
fs_slfs_write, fs_slfs_lseek, fs_slfs_unlink,
fs_slfs_rename) == 0);
#pragma diag_pop
#endif
#endif
return ret;
}
#endif /* !defined(MG_FS_NO_VFS) */
#endif /* MG_NET_IF == MG_NET_IF_SIMPLELINK && (defined(MG_FS_SLFS) || \
defined(MG_FS_SPIFFS)) */
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/simplelink/sl_socket.c"
#endif
#if MG_NET_IF == MG_NET_IF_SIMPLELINK
#include
#include
/* Amalgamated: #include "common/platform.h" */
const char *inet_ntop(int af, const void *src, char *dst, socklen_t size) {
int res;
struct in_addr *in = (struct in_addr *) src;
if (af != AF_INET) {
errno = ENOTSUP;
return NULL;
}
res = snprintf(dst, size, "%lu.%lu.%lu.%lu", SL_IPV4_BYTE(in->s_addr, 0),
SL_IPV4_BYTE(in->s_addr, 1), SL_IPV4_BYTE(in->s_addr, 2),
SL_IPV4_BYTE(in->s_addr, 3));
return res > 0 ? dst : NULL;
}
char *inet_ntoa(struct in_addr n) {
static char a[16];
return (char *) inet_ntop(AF_INET, &n, a, sizeof(a));
}
int inet_pton(int af, const char *src, void *dst) {
uint32_t a0, a1, a2, a3;
uint8_t *db = (uint8_t *) dst;
if (af != AF_INET) {
errno = ENOTSUP;
return 0;
}
if (sscanf(src, "%lu.%lu.%lu.%lu", &a0, &a1, &a2, &a3) != 4) {
return 0;
}
*db = a3;
*(db + 1) = a2;
*(db + 2) = a1;
*(db + 3) = a0;
return 1;
}
#endif /* MG_NET_IF == MG_NET_IF_SIMPLELINK */
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/simplelink/sl_mg_task.c"
#endif
#if MG_NET_IF == MG_NET_IF_SIMPLELINK && !defined(MG_SIMPLELINK_NO_OSI)
/* Amalgamated: #include "mg_task.h" */
#include
enum mg_q_msg_type {
MG_Q_MSG_CB,
};
struct mg_q_msg {
enum mg_q_msg_type type;
void (*cb)(struct mg_mgr *mgr, void *arg);
void *arg;
};
static OsiMsgQ_t s_mg_q;
static void mg_task(void *arg);
bool mg_start_task(int priority, int stack_size, mg_init_cb mg_init) {
if (osi_MsgQCreate(&s_mg_q, "MG", sizeof(struct mg_q_msg), 16) != OSI_OK) {
return false;
}
if (osi_TaskCreate(mg_task, (const signed char *) "MG", stack_size,
(void *) mg_init, priority, NULL) != OSI_OK) {
return false;
}
return true;
}
static void mg_task(void *arg) {
struct mg_mgr mgr;
mg_init_cb mg_init = (mg_init_cb) arg;
mg_mgr_init(&mgr, NULL);
mg_init(&mgr);
while (1) {
struct mg_q_msg msg;
mg_mgr_poll(&mgr, 1);
if (osi_MsgQRead(&s_mg_q, &msg, 1) != OSI_OK) continue;
switch (msg.type) {
case MG_Q_MSG_CB: {
msg.cb(&mgr, msg.arg);
}
}
}
}
void mg_run_in_task(void (*cb)(struct mg_mgr *mgr, void *arg), void *cb_arg) {
struct mg_q_msg msg = {MG_Q_MSG_CB, cb, cb_arg};
osi_MsgQWrite(&s_mg_q, &msg, OSI_NO_WAIT);
}
#endif /* MG_NET_IF == MG_NET_IF_SIMPLELINK && !defined(MG_SIMPLELINK_NO_OSI) \
*/
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/simplelink/sl_net_if.h"
#endif
#ifndef CS_COMMON_PLATFORMS_SIMPLELINK_SL_NET_IF_H_
#define CS_COMMON_PLATFORMS_SIMPLELINK_SL_NET_IF_H_
/* Amalgamated: #include "mongoose/src/net_if.h" */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#ifndef MG_ENABLE_NET_IF_SIMPLELINK
#define MG_ENABLE_NET_IF_SIMPLELINK MG_NET_IF == MG_NET_IF_SIMPLELINK
#endif
extern const struct mg_iface_vtable mg_simplelink_iface_vtable;
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* CS_COMMON_PLATFORMS_SIMPLELINK_SL_NET_IF_H_ */
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/simplelink/sl_net_if.c"
#endif
/* Amalgamated: #include "common/platforms/simplelink/sl_net_if.h" */
#if MG_ENABLE_NET_IF_SIMPLELINK
/* Amalgamated: #include "mongoose/src/internal.h" */
/* Amalgamated: #include "mongoose/src/util.h" */
#define MG_TCP_RECV_BUFFER_SIZE 1024
#define MG_UDP_RECV_BUFFER_SIZE 1500
static sock_t mg_open_listening_socket(struct mg_connection *nc,
union socket_address *sa, int type,
int proto);
static void mg_set_non_blocking_mode(sock_t sock) {
SlSockNonblocking_t opt;
#if SL_MAJOR_VERSION_NUM < 2
opt.NonblockingEnabled = 1;
#else
opt.NonBlockingEnabled = 1;
#endif
sl_SetSockOpt(sock, SL_SOL_SOCKET, SL_SO_NONBLOCKING, &opt, sizeof(opt));
}
static int mg_is_error(int n) {
return (n < 0 && n != SL_ERROR_BSD_EALREADY && n != SL_ERROR_BSD_EAGAIN);
}
static void mg_sl_if_connect_tcp(struct mg_connection *nc,
const union socket_address *sa) {
int proto = 0;
#if MG_ENABLE_SSL && MG_SSL_IF == MG_SSL_IF_SIMPLELINK
if (nc->flags & MG_F_SSL) proto = SL_SEC_SOCKET;
#endif
sock_t sock = sl_Socket(AF_INET, SOCK_STREAM, proto);
if (sock < 0) {
nc->err = sock;
goto out;
}
mg_sock_set(nc, sock);
#if MG_ENABLE_SSL && MG_SSL_IF == MG_SSL_IF_SIMPLELINK
nc->err = sl_set_ssl_opts(sock, nc);
if (nc->err != 0) goto out;
#endif
nc->err = sl_Connect(sock, &sa->sa, sizeof(sa->sin));
out:
DBG(("%p to %s:%d sock %d %d err %d", (void*)nc, inet_ntoa(sa->sin.sin_addr),
ntohs(sa->sin.sin_port), nc->sock, proto, nc->err));
}
static void mg_sl_if_connect_udp(struct mg_connection *nc) {
sock_t sock = sl_Socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0) {
nc->err = sock;
return;
}
mg_sock_set(nc, sock);
nc->err = 0;
}
static int mg_sl_if_listen_tcp(struct mg_connection *nc,
union socket_address *sa) {
int proto = 0;
if (nc->flags & MG_F_SSL) proto = SL_SEC_SOCKET;
sock_t sock = mg_open_listening_socket(nc, sa, SOCK_STREAM, proto);
if (sock < 0) return sock;
mg_sock_set(nc, sock);
return 0;
}
static int mg_sl_if_listen_udp(struct mg_connection *nc,
union socket_address *sa) {
sock_t sock = mg_open_listening_socket(nc, sa, SOCK_DGRAM, 0);
if (sock == INVALID_SOCKET) return (errno ? errno : 1);
mg_sock_set(nc, sock);
return 0;
}
static int mg_sl_if_tcp_send(struct mg_connection *nc, const void *buf,
size_t len) {
int n = (int) sl_Send(nc->sock, buf, len, 0);
if (n < 0 && !mg_is_error(n)) n = 0;
return n;
}
static int mg_sl_if_udp_send(struct mg_connection *nc, const void *buf,
size_t len) {
int n = sl_SendTo(nc->sock, buf, len, 0, &nc->sa.sa, sizeof(nc->sa.sin));
if (n < 0 && !mg_is_error(n)) n = 0;
return n;
}
static int mg_sl_if_tcp_recv(struct mg_connection *nc, void *buf, size_t len) {
int n = sl_Recv(nc->sock, buf, len, 0);
if (n == 0) {
/* Orderly shutdown of the socket, try flushing output. */
nc->flags |= MG_F_SEND_AND_CLOSE;
} else if (n < 0 && !mg_is_error(n)) {
n = 0;
}
return n;
}
static int mg_sl_if_udp_recv(struct mg_connection *nc, void *buf, size_t len,
union socket_address *sa, size_t *sa_len) {
SlSocklen_t sa_len_t = *sa_len;
int n = sl_RecvFrom(nc->sock, buf, MG_UDP_RECV_BUFFER_SIZE, 0,
(SlSockAddr_t *) sa, &sa_len_t);
*sa_len = sa_len_t;
if (n < 0 && !mg_is_error(n)) n = 0;
return n;
}
static int mg_sl_if_create_conn(struct mg_connection *nc) {
(void) nc;
return 1;
}
void mg_sl_if_destroy_conn(struct mg_connection *nc) {
if (nc->sock == INVALID_SOCKET) return;
/* For UDP, only close outgoing sockets or listeners. */
if (!(nc->flags & MG_F_UDP) || nc->listener == NULL) {
sl_Close(nc->sock);
}
nc->sock = INVALID_SOCKET;
}
static int mg_accept_conn(struct mg_connection *lc) {
struct mg_connection *nc;
union socket_address sa;
socklen_t sa_len = sizeof(sa);
sock_t sock = sl_Accept(lc->sock, &sa.sa, &sa_len);
if (sock < 0) {
DBG(("%p: failed to accept: %d", (void*)lc, sock));
return 0;
}
nc = mg_if_accept_new_conn(lc);
if (nc == NULL) {
sl_Close(sock);
return 0;
}
DBG(("%p conn from %s:%d", (void*)nc, inet_ntoa(sa.sin.sin_addr),
ntohs(sa.sin.sin_port)));
mg_sock_set(nc, sock);
mg_if_accept_tcp_cb(nc, &sa, sa_len);
return 1;
}
/* 'sa' must be an initialized address to bind to */
static sock_t mg_open_listening_socket(struct mg_connection *nc,
union socket_address *sa, int type,
int proto) {
int r;
socklen_t sa_len =
(sa->sa.sa_family == AF_INET) ? sizeof(sa->sin) : sizeof(sa->sin6);
sock_t sock = sl_Socket(sa->sa.sa_family, type, proto);
if (sock < 0) return sock;
#if MG_ENABLE_SSL && MG_SSL_IF == MG_SSL_IF_SIMPLELINK
if ((r = sl_set_ssl_opts(sock, nc)) < 0) goto clean;
#endif
if ((r = sl_Bind(sock, &sa->sa, sa_len)) < 0) goto clean;
if (type != SOCK_DGRAM) {
if ((r = sl_Listen(sock, SOMAXCONN)) < 0) goto clean;
}
mg_set_non_blocking_mode(sock);
clean:
if (r < 0) {
sl_Close(sock);
sock = r;
}
return sock;
}
#define _MG_F_FD_CAN_READ 1
#define _MG_F_FD_CAN_WRITE 1 << 1
#define _MG_F_FD_ERROR 1 << 2
void mg_mgr_handle_conn(struct mg_connection *nc, int fd_flags, double now) {
DBG(("%p fd=%d fd_flags=%d nc_flags=0x%lx rmbl=%d smbl=%d", (void*)nc, nc->sock,
fd_flags, nc->flags, (int) nc->recv_mbuf.len, (int) nc->send_mbuf.len));
if (!mg_if_poll(nc, now)) return;
if (nc->flags & MG_F_CONNECTING) {
if ((nc->flags & MG_F_UDP) || nc->err != SL_ERROR_BSD_EALREADY) {
mg_if_connect_cb(nc, nc->err);
} else {
/* In SimpleLink, to get status of non-blocking connect() we need to wait
* until socket is writable and repeat the call to sl_Connect again,
* which will now return the real status. */
if (fd_flags & _MG_F_FD_CAN_WRITE) {
nc->err = sl_Connect(nc->sock, &nc->sa.sa, sizeof(nc->sa.sin));
DBG(("%p conn res=%d", (void*)nc, nc->err));
if (nc->err == SL_ERROR_BSD_ESECSNOVERIFY ||
/* TODO(rojer): Provide API to set the date for verification. */
nc->err == SL_ERROR_BSD_ESECDATEERROR
#if SL_MAJOR_VERSION_NUM >= 2
/* Per SWRU455, this error does not mean verification failed,
* it only means that the cert used is not present in the trusted
* root CA catalog. Which is perfectly fine. */
||
nc->err == SL_ERROR_BSD_ESECUNKNOWNROOTCA
#endif
) {
nc->err = 0;
}
mg_if_connect_cb(nc, nc->err);
}
}
/* Ignore read/write in further processing, we've handled it. */
fd_flags &= ~(_MG_F_FD_CAN_READ | _MG_F_FD_CAN_WRITE);
}
if (fd_flags & _MG_F_FD_CAN_READ) {
if (nc->flags & MG_F_UDP) {
mg_if_can_recv_cb(nc);
} else {
if (nc->flags & MG_F_LISTENING) {
mg_accept_conn(nc);
} else {
mg_if_can_recv_cb(nc);
}
}
}
if (fd_flags & _MG_F_FD_CAN_WRITE) {
mg_if_can_send_cb(nc);
}
DBG(("%p after fd=%d nc_flags=0x%lx rmbl=%d smbl=%d", (void*)nc, nc->sock, nc->flags,
(int) nc->recv_mbuf.len, (int) nc->send_mbuf.len));
}
/* Associate a socket to a connection. */
void mg_sl_if_sock_set(struct mg_connection *nc, sock_t sock) {
mg_set_non_blocking_mode(sock);
nc->sock = sock;
DBG(("%p %d", (void*)nc, sock));
}
void mg_sl_if_init(struct mg_iface *iface) {
(void) iface;
DBG(("%p using sl_Select()", (void*)iface->mgr));
}
void mg_sl_if_free(struct mg_iface *iface) {
(void) iface;
}
void mg_sl_if_add_conn(struct mg_connection *nc) {
(void) nc;
}
void mg_sl_if_remove_conn(struct mg_connection *nc) {
(void) nc;
}
time_t mg_sl_if_poll(struct mg_iface *iface, int timeout_ms) {
struct mg_mgr *mgr = iface->mgr;
double now = mg_time();
double min_timer;
struct mg_connection *nc, *tmp;
struct SlTimeval_t tv;
SlFdSet_t read_set, write_set, err_set;
sock_t max_fd = INVALID_SOCKET;
int num_fds, num_ev = 0, num_timers = 0;
SL_SOCKET_FD_ZERO(&read_set);
SL_SOCKET_FD_ZERO(&write_set);
SL_SOCKET_FD_ZERO(&err_set);
/*
* Note: it is ok to have connections with sock == INVALID_SOCKET in the list,
* e.g. timer-only "connections".
*/
min_timer = 0;
for (nc = mgr->active_connections, num_fds = 0; nc != NULL; nc = tmp) {
tmp = nc->next;
if (nc->sock != INVALID_SOCKET) {
num_fds++;
if (!(nc->flags & MG_F_WANT_WRITE) &&
nc->recv_mbuf.len < nc->recv_mbuf_limit &&
(!(nc->flags & MG_F_UDP) || nc->listener == NULL)) {
SL_SOCKET_FD_SET(nc->sock, &read_set);
if (max_fd == INVALID_SOCKET || nc->sock > max_fd) max_fd = nc->sock;
}
if (((nc->flags & MG_F_CONNECTING) && !(nc->flags & MG_F_WANT_READ)) ||
(nc->send_mbuf.len > 0 && !(nc->flags & MG_F_CONNECTING))) {
SL_SOCKET_FD_SET(nc->sock, &write_set);
SL_SOCKET_FD_SET(nc->sock, &err_set);
if (max_fd == INVALID_SOCKET || nc->sock > max_fd) max_fd = nc->sock;
}
}
if (nc->ev_timer_time > 0) {
if (num_timers == 0 || nc->ev_timer_time < min_timer) {
min_timer = nc->ev_timer_time;
}
num_timers++;
}
}
/*
* If there is a timer to be fired earlier than the requested timeout,
* adjust the timeout.
*/
if (num_timers > 0) {
double timer_timeout_ms = (min_timer - mg_time()) * 1000 + 1 /* rounding */;
if (timer_timeout_ms < timeout_ms) {
timeout_ms = timer_timeout_ms;
}
}
if (timeout_ms < 0) timeout_ms = 0;
tv.tv_sec = timeout_ms / 1000;
tv.tv_usec = (timeout_ms % 1000) * 1000;
if (num_fds > 0) {
num_ev = sl_Select((int) max_fd + 1, &read_set, &write_set, &err_set, &tv);
}
now = mg_time();
DBG(("sl_Select @ %ld num_ev=%d of %d, timeout=%d", (long) now, num_ev,
num_fds, timeout_ms));
for (nc = mgr->active_connections; nc != NULL; nc = tmp) {
int fd_flags = 0;
if (nc->sock != INVALID_SOCKET) {
if (num_ev > 0) {
fd_flags =
(SL_SOCKET_FD_ISSET(nc->sock, &read_set) &&
(!(nc->flags & MG_F_UDP) || nc->listener == NULL)
? _MG_F_FD_CAN_READ
: 0) |
(SL_SOCKET_FD_ISSET(nc->sock, &write_set) ? _MG_F_FD_CAN_WRITE
: 0) |
(SL_SOCKET_FD_ISSET(nc->sock, &err_set) ? _MG_F_FD_ERROR : 0);
}
/* SimpleLink does not report UDP sockets as writable. */
if (nc->flags & MG_F_UDP && nc->send_mbuf.len > 0) {
fd_flags |= _MG_F_FD_CAN_WRITE;
}
}
tmp = nc->next;
mg_mgr_handle_conn(nc, fd_flags, now);
}
return now;
}
void mg_sl_if_get_conn_addr(struct mg_connection *nc, int remote,
union socket_address *sa) {
/* SimpleLink does not provide a way to get socket's peer address after
* accept or connect. Address should have been preserved in the connection,
* so we do our best here by using it. */
if (remote) memcpy(sa, &nc->sa, sizeof(*sa));
}
void sl_restart_cb(struct mg_mgr *mgr) {
/*
* SimpleLink has been restarted, meaning all sockets have been invalidated.
* We try our best - we'll restart the listeners, but for outgoing
* connections we have no option but to terminate.
*/
struct mg_connection *nc;
for (nc = mg_next(mgr, NULL); nc != NULL; nc = mg_next(mgr, nc)) {
if (nc->sock == INVALID_SOCKET) continue; /* Could be a timer */
if (nc->flags & MG_F_LISTENING) {
DBG(("restarting %p %s:%d", (void*)nc, inet_ntoa(nc->sa.sin.sin_addr),
ntohs(nc->sa.sin.sin_port)));
int res = (nc->flags & MG_F_UDP ? mg_sl_if_listen_udp(nc, &nc->sa)
: mg_sl_if_listen_tcp(nc, &nc->sa));
if (res == 0) continue;
/* Well, we tried and failed. Fall through to closing. */
}
nc->sock = INVALID_SOCKET;
DBG(("terminating %p %s:%d", (void*)nc, inet_ntoa(nc->sa.sin.sin_addr),
ntohs(nc->sa.sin.sin_port)));
/* TODO(rojer): Outgoing UDP? */
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
}
}
/* clang-format off */
#define MG_SL_IFACE_VTABLE \
{ \
mg_sl_if_init, \
mg_sl_if_free, \
mg_sl_if_add_conn, \
mg_sl_if_remove_conn, \
mg_sl_if_poll, \
mg_sl_if_listen_tcp, \
mg_sl_if_listen_udp, \
mg_sl_if_connect_tcp, \
mg_sl_if_connect_udp, \
mg_sl_if_tcp_send, \
mg_sl_if_udp_send, \
mg_sl_if_tcp_recv, \
mg_sl_if_udp_recv, \
mg_sl_if_create_conn, \
mg_sl_if_destroy_conn, \
mg_sl_if_sock_set, \
mg_sl_if_get_conn_addr, \
}
/* clang-format on */
const struct mg_iface_vtable mg_simplelink_iface_vtable = MG_SL_IFACE_VTABLE;
#if MG_NET_IF == MG_NET_IF_SIMPLELINK
const struct mg_iface_vtable mg_default_iface_vtable = MG_SL_IFACE_VTABLE;
#endif
#endif /* MG_ENABLE_NET_IF_SIMPLELINK */
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/simplelink/sl_ssl_if.c"
#endif
#if MG_ENABLE_SSL && MG_SSL_IF == MG_SSL_IF_SIMPLELINK
/* Amalgamated: #include "common/mg_mem.h" */
#ifndef MG_SSL_IF_SIMPLELINK_SLFS_PREFIX
#define MG_SSL_IF_SIMPLELINK_SLFS_PREFIX "SL:"
#endif
#define MG_SSL_IF_SIMPLELINK_SLFS_PREFIX_LEN \
(sizeof(MG_SSL_IF_SIMPLELINK_SLFS_PREFIX) - 1)
struct mg_ssl_if_ctx {
char *ssl_cert;
char *ssl_key;
char *ssl_ca_cert;
char *ssl_server_name;
};
void mg_ssl_if_init() {
}
enum mg_ssl_if_result mg_ssl_if_conn_init(
struct mg_connection *nc, const struct mg_ssl_if_conn_params *params,
const char **err_msg) {
struct mg_ssl_if_ctx *ctx =
(struct mg_ssl_if_ctx *) MG_CALLOC(1, sizeof(*ctx));
if (ctx == NULL) {
MG_SET_PTRPTR(err_msg, "Out of memory");
return MG_SSL_ERROR;
}
nc->ssl_if_data = ctx;
if (params->cert != NULL || params->key != NULL) {
if (params->cert != NULL && params->key != NULL) {
ctx->ssl_cert = strdup(params->cert);
ctx->ssl_key = strdup(params->key);
} else {
MG_SET_PTRPTR(err_msg, "Both cert and key are required.");
return MG_SSL_ERROR;
}
}
if (params->ca_cert != NULL && strcmp(params->ca_cert, "*") != 0) {
ctx->ssl_ca_cert = strdup(params->ca_cert);
}
/* TODO(rojer): cipher_suites. */
if (params->server_name != NULL) {
ctx->ssl_server_name = strdup(params->server_name);
}
return MG_SSL_OK;
}
enum mg_ssl_if_result mg_ssl_if_conn_accept(struct mg_connection *nc,
struct mg_connection *lc) {
/* SimpleLink does everything for us, nothing for us to do. */
(void) nc;
(void) lc;
return MG_SSL_OK;
}
enum mg_ssl_if_result mg_ssl_if_handshake(struct mg_connection *nc) {
/* SimpleLink has already performed the handshake, nothing to do. */
return MG_SSL_OK;
}
int mg_ssl_if_read(struct mg_connection *nc, void *buf, size_t len) {
/* SimpelLink handles TLS, so this is just a pass-through. */
int n = nc->iface->vtable->tcp_recv(nc, buf, len);
if (n == 0) nc->flags |= MG_F_WANT_READ;
return n;
}
int mg_ssl_if_write(struct mg_connection *nc, const void *buf, size_t len) {
/* SimpelLink handles TLS, so this is just a pass-through. */
return nc->iface->vtable->tcp_send(nc, buf, len);
}
void mg_ssl_if_conn_close_notify(struct mg_connection *nc) {
/* Nothing to do */
(void) nc;
}
void mg_ssl_if_conn_free(struct mg_connection *nc) {
struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data;
if (ctx == NULL) return;
nc->ssl_if_data = NULL;
MG_FREE(ctx->ssl_cert);
MG_FREE(ctx->ssl_key);
MG_FREE(ctx->ssl_ca_cert);
MG_FREE(ctx->ssl_server_name);
memset(ctx, 0, sizeof(*ctx));
MG_FREE(ctx);
}
bool pem_to_der(const char *pem_file, const char *der_file) {
bool ret = false;
FILE *pf = NULL, *df = NULL;
bool writing = false;
pf = fopen(pem_file, "r");
if (pf == NULL) goto clean;
remove(der_file);
fs_slfs_set_file_size(der_file + MG_SSL_IF_SIMPLELINK_SLFS_PREFIX_LEN, 2048);
df = fopen(der_file, "w");
fs_slfs_unset_file_flags(der_file + MG_SSL_IF_SIMPLELINK_SLFS_PREFIX_LEN);
if (df == NULL) goto clean;
while (1) {
char pem_buf[70];
char der_buf[48];
if (!fgets(pem_buf, sizeof(pem_buf), pf)) break;
if (writing) {
if (strstr(pem_buf, "-----END ") != NULL) {
ret = true;
break;
}
int l = 0;
while (!isspace((unsigned int) pem_buf[l])) l++;
int der_len = 0;
cs_base64_decode((const unsigned char *) pem_buf, sizeof(pem_buf),
der_buf, &der_len);
if (der_len <= 0) break;
if (fwrite(der_buf, 1, der_len, df) != der_len) break;
} else if (strstr(pem_buf, "-----BEGIN ") != NULL) {
writing = true;
}
}
clean:
if (pf != NULL) fclose(pf);
if (df != NULL) {
fclose(df);
if (!ret) remove(der_file);
}
return ret;
}
#if MG_ENABLE_FILESYSTEM && defined(MG_FS_SLFS)
/* If the file's extension is .pem, convert it to DER format and put on SLFS. */
static char *sl_pem2der(const char *pem_file) {
const char *pem_ext = strstr(pem_file, ".pem");
if (pem_ext == NULL || *(pem_ext + 4) != '\0') {
return strdup(pem_file);
}
char *der_file = NULL;
/* DER file must be located on SLFS, add prefix. */
int l = mg_asprintf(&der_file, 0, MG_SSL_IF_SIMPLELINK_SLFS_PREFIX "%.*s.der",
(int) (pem_ext - pem_file), pem_file);
if (der_file == NULL) return NULL;
bool result = false;
cs_stat_t st;
if (mg_stat(der_file, &st) != 0) {
result = pem_to_der(pem_file, der_file);
LOG(LL_DEBUG, ("%s -> %s = %d", pem_file, der_file, result));
} else {
/* File exists, assume it's already been converted. */
result = true;
}
if (result) {
/* Strip the SL: prefix we added since NWP does not expect it. */
memmove(der_file, der_file + MG_SSL_IF_SIMPLELINK_SLFS_PREFIX_LEN,
l - 2 /* including \0 */);
} else {
MG_FREE(der_file);
der_file = NULL;
}
return der_file;
}
#else
static char *sl_pem2der(const char *pem_file) {
return strdup(pem_file);
}
#endif
int sl_set_ssl_opts(int sock, struct mg_connection *nc) {
int err;
const struct mg_ssl_if_ctx *ctx = (struct mg_ssl_if_ctx *) nc->ssl_if_data;
DBG(("%p ssl ctx: %p", (void*)nc, ctx));
if (ctx == NULL) return 0;
DBG(("%p %s,%s,%s,%s", (void*)nc, (ctx->ssl_cert ? ctx->ssl_cert : "-"),
(ctx->ssl_key ? ctx->ssl_cert : "-"),
(ctx->ssl_ca_cert ? ctx->ssl_ca_cert : "-"),
(ctx->ssl_server_name ? ctx->ssl_server_name : "-")));
if (ctx->ssl_cert != NULL && ctx->ssl_key != NULL) {
char *ssl_cert = sl_pem2der(ctx->ssl_cert), *ssl_key = NULL;
if (ssl_cert != NULL) {
err = sl_SetSockOpt(sock, SL_SOL_SOCKET,
SL_SO_SECURE_FILES_CERTIFICATE_FILE_NAME, ssl_cert,
strlen(ssl_cert));
MG_FREE(ssl_cert);
LOG(LL_DEBUG, ("CERTIFICATE_FILE_NAME %s -> %d", ssl_cert, err));
ssl_key = sl_pem2der(ctx->ssl_key);
if (ssl_key != NULL) {
err = sl_SetSockOpt(sock, SL_SOL_SOCKET,
SL_SO_SECURE_FILES_PRIVATE_KEY_FILE_NAME, ssl_key,
strlen(ssl_key));
MG_FREE(ssl_key);
LOG(LL_DEBUG, ("PRIVATE_KEY_FILE_NAME %s -> %d", ssl_key, err));
} else {
err = -1;
}
} else {
err = -1;
}
if (err != 0) return err;
}
if (ctx->ssl_ca_cert != NULL) {
if (ctx->ssl_ca_cert[0] != '\0') {
char *ssl_ca_cert = sl_pem2der(ctx->ssl_ca_cert);
if (ssl_ca_cert != NULL) {
err =
sl_SetSockOpt(sock, SL_SOL_SOCKET, SL_SO_SECURE_FILES_CA_FILE_NAME,
ssl_ca_cert, strlen(ssl_ca_cert));
LOG(LL_DEBUG, ("CA_FILE_NAME %s -> %d", ssl_ca_cert, err));
} else {
err = -1;
}
MG_FREE(ssl_ca_cert);
if (err != 0) return err;
}
}
if (ctx->ssl_server_name != NULL) {
err = sl_SetSockOpt(sock, SL_SOL_SOCKET,
SL_SO_SECURE_DOMAIN_NAME_VERIFICATION,
ctx->ssl_server_name, strlen(ctx->ssl_server_name));
DBG(("DOMAIN_NAME_VERIFICATION %s -> %d", ctx->ssl_server_name, err));
/* Domain name verificationw as added in a NWP service pack, older
* versions return SL_ERROR_BSD_ENOPROTOOPT. There isn't much we can do
* about it,
* so we ignore the error. */
if (err != 0 && err != SL_ERROR_BSD_ENOPROTOOPT) return err;
}
return 0;
}
#endif /* MG_ENABLE_SSL && MG_SSL_IF == MG_SSL_IF_SIMPLELINK */
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/lwip/mg_lwip_net_if.h"
#endif
#ifndef CS_COMMON_PLATFORMS_LWIP_MG_NET_IF_LWIP_H_
#define CS_COMMON_PLATFORMS_LWIP_MG_NET_IF_LWIP_H_
#ifndef MG_ENABLE_NET_IF_LWIP_LOW_LEVEL
#define MG_ENABLE_NET_IF_LWIP_LOW_LEVEL MG_NET_IF == MG_NET_IF_LWIP_LOW_LEVEL
#endif
#if MG_ENABLE_NET_IF_LWIP_LOW_LEVEL
#include
extern const struct mg_iface_vtable mg_lwip_iface_vtable;
struct mg_lwip_conn_state {
struct mg_connection *nc;
struct mg_connection *lc;
union {
struct tcp_pcb *tcp;
struct udp_pcb *udp;
} pcb;
err_t err;
size_t num_sent; /* Number of acknowledged bytes to be reported to the core */
struct pbuf *rx_chain; /* Chain of incoming data segments. */
size_t rx_offset; /* Offset within the first pbuf (if partially consumed) */
/* Last SSL write size, for retries. */
int last_ssl_write_size;
/* Whether MG_SIG_RECV is already pending for this connection */
int recv_pending;
/* Whether the connection is about to close, just `rx_chain` needs to drain */
int draining_rx_chain;
};
enum mg_sig_type {
MG_SIG_CONNECT_RESULT = 1,
MG_SIG_RECV = 2,
MG_SIG_CLOSE_CONN = 3,
MG_SIG_TOMBSTONE = 4,
MG_SIG_ACCEPT = 5,
};
void mg_lwip_post_signal(enum mg_sig_type sig, struct mg_connection *nc);
/* To be implemented by the platform. */
void mg_lwip_mgr_schedule_poll(struct mg_mgr *mgr);
#endif /* MG_ENABLE_NET_IF_LWIP_LOW_LEVEL */
#endif /* CS_COMMON_PLATFORMS_LWIP_MG_NET_IF_LWIP_H_ */
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/lwip/mg_lwip_net_if.c"
#endif
#if MG_ENABLE_NET_IF_LWIP_LOW_LEVEL
/* Amalgamated: #include "common/mg_mem.h" */
#include
#include
#include
#include
#if ((LWIP_VERSION_MAJOR << 8) | LWIP_VERSION_MINOR) >= 0x0105
#include /* For tcp_seg */
#include /* For tcpip_api_call */
#else
#include
#endif
#include
/* Amalgamated: #include "common/cs_dbg.h" */
/*
* Newest versions of LWIP have ip_2_ip4, older have ipX_2_ip,
* even older have nothing.
*/
#ifndef ip_2_ip4
#ifdef ipX_2_ip
#define ip_2_ip4(addr) ipX_2_ip(addr)
#else
#define ip_2_ip4(addr) (addr)
#endif
#endif
/*
* Depending on whether Mongoose is compiled with ipv6 support, use right
* lwip functions
*/
#if MG_ENABLE_IPV6
#define TCP_NEW tcp_new_ip6
#define TCP_BIND tcp_bind_ip6
#define UDP_BIND udp_bind_ip6
#define IPADDR_NTOA(x) ip6addr_ntoa((const ip6_addr_t *)(x))
#define SET_ADDR(dst, src) \
memcpy((dst)->sin6.sin6_addr.s6_addr, (src)->ip6.addr, \
sizeof((dst)->sin6.sin6_addr.s6_addr))
#else
#define TCP_NEW tcp_new
#define TCP_BIND tcp_bind
#define UDP_BIND udp_bind
#define IPADDR_NTOA ipaddr_ntoa
#define SET_ADDR(dst, src) (dst)->sin.sin_addr.s_addr = ip_2_ip4(src)->addr
#endif
#if !NO_SYS
#if LWIP_TCPIP_CORE_LOCKING
/* With locking tcpip_api_call is just a function call wrapped in lock/unlock,
* so we can get away with just casting. */
void mg_lwip_netif_run_on_tcpip(void (*fn)(void *), void *arg) {
tcpip_api_call((tcpip_api_call_fn) fn, (struct tcpip_api_call_data *) arg);
}
#else
static sys_sem_t s_tcpip_call_lock_sem = NULL;
static sys_sem_t s_tcpip_call_sync_sem = NULL;
struct mg_lwip_netif_tcpip_call_ctx {
void (*fn)(void *);
void *arg;
};
static void xxx_tcpip(void *arg) {
struct mg_lwip_netif_tcpip_call_ctx *ctx =
(struct mg_lwip_netif_tcpip_call_ctx *) arg;
ctx->fn(ctx->arg);
sys_sem_signal(&s_tcpip_call_sync_sem);
}
void mg_lwip_netif_run_on_tcpip(void (*fn)(void *), void *arg) {
struct mg_lwip_netif_tcpip_call_ctx ctx = {.fn = fn, .arg = arg};
sys_arch_sem_wait(&s_tcpip_call_lock_sem, 0);
tcpip_send_msg_wait_sem(xxx_tcpip, &ctx, &s_tcpip_call_sync_sem);
sys_sem_signal(&s_tcpip_call_lock_sem);
}
#endif
#else
#define mg_lwip_netif_run_on_tcpip(fn, arg) (fn)(arg)
#endif
void mg_lwip_if_init(struct mg_iface *iface);
void mg_lwip_if_free(struct mg_iface *iface);
void mg_lwip_if_add_conn(struct mg_connection *nc);
void mg_lwip_if_remove_conn(struct mg_connection *nc);
time_t mg_lwip_if_poll(struct mg_iface *iface, int timeout_ms);
// If compiling for Mongoose OS.
#ifdef MGOS
extern void mgos_lock();
extern void mgos_unlock();
#else
#define mgos_lock()
#define mgos_unlock()
#endif
static void mg_lwip_recv_common(struct mg_connection *nc, struct pbuf *p);
#if LWIP_TCP_KEEPALIVE
void mg_lwip_set_keepalive_params(struct mg_connection *nc, int idle,
int interval, int count) {
if (nc->sock == INVALID_SOCKET || nc->flags & MG_F_UDP) {
return;
}
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
struct tcp_pcb *tpcb = cs->pcb.tcp;
if (idle > 0 && interval > 0 && count > 0) {
tpcb->keep_idle = idle * 1000;
tpcb->keep_intvl = interval * 1000;
tpcb->keep_cnt = count;
tpcb->so_options |= SOF_KEEPALIVE;
} else {
tpcb->so_options &= ~SOF_KEEPALIVE;
}
}
#elif !defined(MG_NO_LWIP_TCP_KEEPALIVE)
#warning LWIP TCP keepalive is disabled. Please consider enabling it.
#endif /* LWIP_TCP_KEEPALIVE */
static err_t mg_lwip_tcp_conn_cb(void *arg, struct tcp_pcb *tpcb, err_t err) {
struct mg_connection *nc = (struct mg_connection *) arg;
DBG(("%p connect to %s:%u = %d", (void*)nc, IPADDR_NTOA(ipX_2_ip(&tpcb->remote_ip)),
tpcb->remote_port, err));
if (nc == NULL) {
tcp_abort(tpcb);
return ERR_ARG;
}
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
cs->err = err;
#if LWIP_TCP_KEEPALIVE
if (err == 0) mg_lwip_set_keepalive_params(nc, 60, 10, 6);
#endif
mg_lwip_post_signal(MG_SIG_CONNECT_RESULT, nc);
return ERR_OK;
}
static void mg_lwip_tcp_error_cb(void *arg, err_t err) {
struct mg_connection *nc = (struct mg_connection *) arg;
DBG(("%p conn error %d", (void*)nc, err));
if (nc == NULL || (nc->flags & MG_F_CLOSE_IMMEDIATELY)) return;
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
cs->pcb.tcp = NULL; /* Has already been deallocated */
if (nc->flags & MG_F_CONNECTING) {
cs->err = err;
mg_lwip_post_signal(MG_SIG_CONNECT_RESULT, nc);
} else {
mg_lwip_post_signal(MG_SIG_CLOSE_CONN, nc);
}
}
static err_t mg_lwip_tcp_recv_cb(void *arg, struct tcp_pcb *tpcb,
struct pbuf *p, err_t err) {
struct mg_connection *nc = (struct mg_connection *) arg;
struct mg_lwip_conn_state *cs =
(nc ? (struct mg_lwip_conn_state *) nc->sock : NULL);
DBG(("%p %p %p %p %u %d", (void*)nc, (void*)cs, (void*)tpcb, (void*)p, (p != NULL ? p->tot_len : 0),
err));
if (p == NULL) {
if (nc != NULL && !(nc->flags & MG_F_CLOSE_IMMEDIATELY)) {
if (cs->rx_chain != NULL) {
/*
* rx_chain still contains non-consumed data, don't close the
* connection
*/
cs->draining_rx_chain = 1;
} else {
mg_lwip_post_signal(MG_SIG_CLOSE_CONN, nc);
}
} else {
/* Tombstoned connection, do nothing. */
}
return ERR_OK;
} else if (nc == NULL) {
tcp_abort(tpcb);
return ERR_ARG;
}
/*
* If we get a chain of more than one segment at once, we need to bump
* refcount on the subsequent bufs to make them independent.
*/
if (p->next != NULL) {
struct pbuf *q = p->next;
for (; q != NULL; q = q->next) pbuf_ref(q);
}
mgos_lock();
if (cs->rx_chain == NULL) {
cs->rx_offset = 0;
} else if (pbuf_clen(cs->rx_chain) >= 4) {
/* ESP SDK has a limited pool of 5 pbufs. We must not hog them all or RX
* will be completely blocked. We already have at least 4 in the chain,
* this one is the last, so we have to make a copy and release this one. */
struct pbuf *np = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
if (np != NULL) {
pbuf_copy(np, p);
pbuf_free(p);
p = np;
}
}
mg_lwip_recv_common(nc, p);
mgos_unlock();
(void) err;
return ERR_OK;
}
static err_t mg_lwip_tcp_sent_cb(void *arg, struct tcp_pcb *tpcb,
u16_t num_sent) {
struct mg_connection *nc = (struct mg_connection *) arg;
DBG(("%p %p %u %p %p", (void*)nc, (void*)tpcb, num_sent, (void*)tpcb->unsent, (void*)tpcb->unacked));
if (nc == NULL) return ERR_OK;
if ((nc->flags & MG_F_SEND_AND_CLOSE) && !(nc->flags & MG_F_WANT_WRITE) &&
nc->send_mbuf.len == 0 && tpcb->unsent == NULL && tpcb->unacked == NULL) {
mg_lwip_post_signal(MG_SIG_CLOSE_CONN, nc);
}
if (nc->send_mbuf.len > 0 || (nc->flags & MG_F_WANT_WRITE)) {
mg_lwip_mgr_schedule_poll(nc->mgr);
}
(void) num_sent;
return ERR_OK;
}
struct mg_lwip_if_connect_tcp_ctx {
struct mg_connection *nc;
const union socket_address *sa;
};
static void mg_lwip_if_connect_tcp_tcpip(void *arg) {
struct mg_lwip_if_connect_tcp_ctx *ctx =
(struct mg_lwip_if_connect_tcp_ctx *) arg;
struct mg_connection *nc = ctx->nc;
const union socket_address *sa = ctx->sa;
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
struct tcp_pcb *tpcb = TCP_NEW();
cs->pcb.tcp = tpcb;
ip_addr_t *ip = (ip_addr_t *) &sa->sin.sin_addr.s_addr;
u16_t port = ntohs(sa->sin.sin_port);
tcp_arg(tpcb, nc);
tcp_err(tpcb, mg_lwip_tcp_error_cb);
tcp_sent(tpcb, mg_lwip_tcp_sent_cb);
tcp_recv(tpcb, mg_lwip_tcp_recv_cb);
cs->err = TCP_BIND(tpcb, IP_ADDR_ANY, 0 /* any port */);
DBG(("%p tcp_bind = %d", (void*)nc, cs->err));
if (cs->err != ERR_OK) {
mg_lwip_post_signal(MG_SIG_CONNECT_RESULT, nc);
return;
}
cs->err = tcp_connect(tpcb, ip, port, mg_lwip_tcp_conn_cb);
DBG(("%p tcp_connect %p = %d", (void*)nc, tpcb, cs->err));
if (cs->err != ERR_OK) {
mg_lwip_post_signal(MG_SIG_CONNECT_RESULT, nc);
return;
}
}
void mg_lwip_if_connect_tcp(struct mg_connection *nc,
const union socket_address *sa) {
struct mg_lwip_if_connect_tcp_ctx ctx = {.nc = nc, .sa = sa};
mg_lwip_netif_run_on_tcpip(mg_lwip_if_connect_tcp_tcpip, &ctx);
}
/*
* Lwip included in the SDKs for nRF5x chips has different type for the
* callback of `udp_recv()`
*/
#if ((LWIP_VERSION_MAJOR << 8) | LWIP_VERSION_MINOR) >= 0x0105
static void mg_lwip_udp_recv_cb(void *arg, struct udp_pcb *pcb, struct pbuf *p,
const ip_addr_t *addr, u16_t port)
#else
static void mg_lwip_udp_recv_cb(void *arg, struct udp_pcb *pcb, struct pbuf *p,
ip_addr_t *addr, u16_t port)
#endif
{
struct mg_connection *nc = (struct mg_connection *) arg;
DBG(("%p %s:%u %p %u %u", (void*)nc, IPADDR_NTOA(addr), port, (void*)p, p->ref, p->len));
/* Put address in a separate pbuf and tack it onto the packet. */
struct pbuf *sap =
pbuf_alloc(PBUF_RAW, sizeof(union socket_address), PBUF_RAM);
if (sap == NULL) {
pbuf_free(p);
return;
}
union socket_address *sa = (union socket_address *) sap->payload;
#if ((LWIP_VERSION_MAJOR << 8) | LWIP_VERSION_MINOR) >= 0x0105
sa->sin.sin_addr.s_addr = ip_2_ip4(addr)->addr;
#else
sa->sin.sin_addr.s_addr = addr->addr;
#endif
sa->sin.sin_port = htons(port);
/* Logic in the recv handler requires that there be exactly one data pbuf. */
p = pbuf_coalesce(p, PBUF_RAW);
pbuf_chain(sap, p);
mgos_lock();
mg_lwip_recv_common(nc, sap);
mgos_unlock();
(void) pcb;
}
static void mg_lwip_recv_common(struct mg_connection *nc, struct pbuf *p) {
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
if (cs->rx_chain == NULL) {
cs->rx_chain = p;
} else {
pbuf_chain(cs->rx_chain, p);
}
if (!cs->recv_pending) {
cs->recv_pending = 1;
mg_lwip_post_signal(MG_SIG_RECV, nc);
}
}
static int mg_lwip_if_udp_recv(struct mg_connection *nc, void *buf, size_t len,
union socket_address *sa, size_t *sa_len) {
/*
* For UDP, RX chain consists of interleaved address and packet bufs:
* Address pbuf followed by exactly one data pbuf (recv_cb took care of that).
*/
int res = 0;
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
if (nc->sock == INVALID_SOCKET) return -1;
mgos_lock();
if (cs->rx_chain != NULL) {
struct pbuf *ap = cs->rx_chain;
struct pbuf *dp = ap->next;
cs->rx_chain = pbuf_dechain(dp);
res = MIN(dp->len, len);
pbuf_copy_partial(dp, buf, res, 0);
pbuf_free(dp);
pbuf_copy_partial(ap, sa, MIN(*sa_len, ap->len), 0);
pbuf_free(ap);
}
mgos_unlock();
return res;
}
static void mg_lwip_if_connect_udp_tcpip(void *arg) {
struct mg_connection *nc = (struct mg_connection *) arg;
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
struct udp_pcb *upcb = udp_new();
cs->err = UDP_BIND(upcb, IP_ADDR_ANY, 0 /* any port */);
DBG(("%p udp_bind %p = %d", (void*)nc, (void*)upcb, cs->err));
if (cs->err == ERR_OK) {
udp_recv(upcb, mg_lwip_udp_recv_cb, nc);
cs->pcb.udp = upcb;
} else {
udp_remove(upcb);
}
mg_lwip_post_signal(MG_SIG_CONNECT_RESULT, nc);
}
void mg_lwip_if_connect_udp(struct mg_connection *nc) {
mg_lwip_netif_run_on_tcpip(mg_lwip_if_connect_udp_tcpip, nc);
}
static void tcp_close_tcpip(void *arg) {
tcp_close((struct tcp_pcb *) arg);
}
void mg_lwip_handle_accept(struct mg_connection *nc) {
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
if (cs->pcb.tcp == NULL) return;
union socket_address sa;
struct tcp_pcb *tpcb = cs->pcb.tcp;
SET_ADDR(&sa, &tpcb->remote_ip);
sa.sin.sin_port = htons(tpcb->remote_port);
mg_if_accept_tcp_cb(nc, &sa, sizeof(sa.sin));
}
static err_t mg_lwip_accept_cb(void *arg, struct tcp_pcb *newtpcb, err_t err) {
struct mg_connection *lc = (struct mg_connection *) arg, *nc;
struct mg_lwip_conn_state *lcs, *cs;
struct tcp_pcb_listen *lpcb;
LOG(LL_DEBUG,
("%p conn %p from %s:%u", (void*)lc, (void*)newtpcb,
IPADDR_NTOA(ipX_2_ip(&newtpcb->remote_ip)), newtpcb->remote_port));
if (lc == NULL) {
tcp_abort(newtpcb);
return ERR_ABRT;
}
lcs = (struct mg_lwip_conn_state *) lc->sock;
lpcb = (struct tcp_pcb_listen *) lcs->pcb.tcp;
#if TCP_LISTEN_BACKLOG
tcp_accepted(lpcb);
#endif
nc = mg_if_accept_new_conn(lc);
if (nc == NULL) {
tcp_abort(newtpcb);
return ERR_ABRT;
}
cs = (struct mg_lwip_conn_state *) nc->sock;
cs->lc = lc;
cs->pcb.tcp = newtpcb;
/* We need to set up callbacks before returning because data may start
* arriving immediately. */
tcp_arg(newtpcb, nc);
tcp_err(newtpcb, mg_lwip_tcp_error_cb);
tcp_sent(newtpcb, mg_lwip_tcp_sent_cb);
tcp_recv(newtpcb, mg_lwip_tcp_recv_cb);
#if LWIP_TCP_KEEPALIVE
mg_lwip_set_keepalive_params(nc, 60, 10, 6);
#endif
mg_lwip_post_signal(MG_SIG_ACCEPT, nc);
(void) err;
(void) lpcb;
return ERR_OK;
}
struct mg_lwip_if_listen_ctx {
struct mg_connection *nc;
union socket_address *sa;
int ret;
};
static void mg_lwip_if_listen_tcp_tcpip(void *arg) {
struct mg_lwip_if_listen_ctx *ctx = (struct mg_lwip_if_listen_ctx *) arg;
struct mg_connection *nc = ctx->nc;
union socket_address *sa = ctx->sa;
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
struct tcp_pcb *tpcb = TCP_NEW();
ip_addr_t *ip = (ip_addr_t *) &sa->sin.sin_addr.s_addr;
u16_t port = ntohs(sa->sin.sin_port);
cs->err = TCP_BIND(tpcb, ip, port);
DBG(("%p tcp_bind(%s:%u) = %d", (void*)nc, IPADDR_NTOA(ip), port, cs->err));
if (cs->err != ERR_OK) {
tcp_close(tpcb);
ctx->ret = -1;
return;
}
tcp_arg(tpcb, nc);
tpcb = tcp_listen(tpcb);
cs->pcb.tcp = tpcb;
tcp_accept(tpcb, mg_lwip_accept_cb);
ctx->ret = 0;
}
int mg_lwip_if_listen_tcp(struct mg_connection *nc, union socket_address *sa) {
struct mg_lwip_if_listen_ctx ctx = {.nc = nc, .sa = sa};
mg_lwip_netif_run_on_tcpip(mg_lwip_if_listen_tcp_tcpip, &ctx);
return ctx.ret;
}
static void mg_lwip_if_listen_udp_tcpip(void *arg) {
struct mg_lwip_if_listen_ctx *ctx = (struct mg_lwip_if_listen_ctx *) arg;
struct mg_connection *nc = ctx->nc;
union socket_address *sa = ctx->sa;
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
struct udp_pcb *upcb = udp_new();
ip_addr_t *ip = (ip_addr_t *) &sa->sin.sin_addr.s_addr;
u16_t port = ntohs(sa->sin.sin_port);
cs->err = UDP_BIND(upcb, ip, port);
DBG(("%p udb_bind(%s:%u) = %d", (void*)nc, IPADDR_NTOA(ip), port, cs->err));
if (cs->err != ERR_OK) {
udp_remove(upcb);
ctx->ret = -1;
} else {
udp_recv(upcb, mg_lwip_udp_recv_cb, nc);
cs->pcb.udp = upcb;
ctx->ret = 0;
}
}
int mg_lwip_if_listen_udp(struct mg_connection *nc, union socket_address *sa) {
struct mg_lwip_if_listen_ctx ctx = {.nc = nc, .sa = sa};
mg_lwip_netif_run_on_tcpip(mg_lwip_if_listen_udp_tcpip, &ctx);
return ctx.ret;
}
struct mg_lwip_tcp_write_ctx {
struct mg_connection *nc;
const void *data;
uint16_t len;
int ret;
};
static void tcp_output_tcpip(void *arg) {
tcp_output((struct tcp_pcb *) arg);
}
static void mg_lwip_tcp_write_tcpip(void *arg) {
struct mg_lwip_tcp_write_ctx *ctx = (struct mg_lwip_tcp_write_ctx *) arg;
struct mg_connection *nc = ctx->nc;
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
struct tcp_pcb *tpcb = cs->pcb.tcp;
size_t len = MIN(tpcb->mss, MIN(ctx->len, tpcb->snd_buf));
size_t unsent, unacked;
if (len == 0) {
DBG(("%p no buf avail %u %u %p %p", (void*)tpcb, tpcb->snd_buf, tpcb->snd_queuelen,
(void*)tpcb->unsent, (void*)tpcb->unacked));
mg_lwip_netif_run_on_tcpip(tcp_output_tcpip, tpcb);
ctx->ret = 0;
return;
}
unsent = (tpcb->unsent != NULL ? tpcb->unsent->len : 0);
unacked = (tpcb->unacked != NULL ? tpcb->unacked->len : 0);
/*
* On ESP8266 we only allow one TCP segment in flight at any given time.
* This may increase latency and reduce efficiency of tcp windowing,
* but memory is scarce and precious on that platform so we do this to
* reduce footprint.
*/
#if CS_PLATFORM == CS_P_ESP8266
if (unacked > 0) {
ctx->ret = 0;
return;
}
len = MIN(len, (TCP_MSS - unsent));
#endif
cs->err = tcp_write(tpcb, ctx->data, len, TCP_WRITE_FLAG_COPY);
unsent = (tpcb->unsent != NULL ? tpcb->unsent->len : 0);
unacked = (tpcb->unacked != NULL ? tpcb->unacked->len : 0);
DBG(("%p tcp_write %u = %d, %u %u", (void*)tpcb, len, cs->err, unsent, unacked));
if (cs->err != ERR_OK) {
/*
* We ignore ERR_MEM because memory will be freed up when the data is sent
* and we'll retry.
*/
ctx->ret = (cs->err == ERR_MEM ? 0 : -1);
return;
}
ctx->ret = len;
(void) unsent;
(void) unacked;
}
int mg_lwip_if_tcp_send(struct mg_connection *nc, const void *buf, size_t len) {
struct mg_lwip_tcp_write_ctx ctx = {.nc = nc, .data = buf, .len = len};
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
if (nc->sock == INVALID_SOCKET) return -1;
struct tcp_pcb *tpcb = cs->pcb.tcp;
if (tpcb == NULL) return -1;
if (tpcb->snd_buf <= 0) return 0;
mg_lwip_netif_run_on_tcpip(mg_lwip_tcp_write_tcpip, &ctx);
return ctx.ret;
}
struct udp_sendto_ctx {
struct udp_pcb *upcb;
struct pbuf *p;
ip_addr_t *ip;
uint16_t port;
int ret;
};
static void udp_sendto_tcpip(void *arg) {
struct udp_sendto_ctx *ctx = (struct udp_sendto_ctx *) arg;
ctx->ret = udp_sendto(ctx->upcb, ctx->p, ctx->ip, ctx->port);
}
static int mg_lwip_if_udp_send(struct mg_connection *nc, const void *data,
size_t len) {
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
if (nc->sock == INVALID_SOCKET || cs->pcb.udp == NULL) return -1;
struct udp_pcb *upcb = cs->pcb.udp;
struct pbuf *p = pbuf_alloc(PBUF_TRANSPORT, len, PBUF_RAM);
#if defined(LWIP_IPV4) && LWIP_IPV4 && defined(LWIP_IPV6) && LWIP_IPV6
ip_addr_t ip = {.u_addr.ip4.addr = nc->sa.sin.sin_addr.s_addr, .type = 0};
#else
ip_addr_t ip = {.addr = nc->sa.sin.sin_addr.s_addr};
#endif
u16_t port = ntohs(nc->sa.sin.sin_port);
if (p == NULL) return 0;
memcpy(p->payload, data, len);
struct udp_sendto_ctx ctx = {.upcb = upcb, .p = p, .ip = &ip, .port = port};
mg_lwip_netif_run_on_tcpip(udp_sendto_tcpip, &ctx);
cs->err = ctx.ret;
pbuf_free(p);
return (cs->err == ERR_OK ? (int) len : -2);
}
static int mg_lwip_if_can_send(struct mg_connection *nc,
struct mg_lwip_conn_state *cs) {
int can_send = 0;
if (nc->send_mbuf.len > 0 || (nc->flags & MG_F_WANT_WRITE)) {
/* We have stuff to send, but can we? */
if (nc->flags & MG_F_UDP) {
/* UDP is always ready for sending. */
can_send = (cs->pcb.udp != NULL);
} else {
can_send = (cs->pcb.tcp != NULL && cs->pcb.tcp->snd_buf > 0);
/* See comment above. */
#if CS_PLATFORM == CS_P_ESP8266
if (cs->pcb.tcp->unacked != NULL) can_send = 0;
#endif
}
}
return can_send;
}
struct tcp_recved_ctx {
struct tcp_pcb *tpcb;
size_t len;
};
void tcp_recved_tcpip(void *arg) {
struct tcp_recved_ctx *ctx = (struct tcp_recved_ctx *) arg;
if (ctx->tpcb != NULL) tcp_recved(ctx->tpcb, ctx->len);
}
static int mg_lwip_if_tcp_recv(struct mg_connection *nc, void *buf,
size_t len) {
int res = 0;
char *bufp = buf;
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
if (nc->sock == INVALID_SOCKET) return -1;
mgos_lock();
while (cs->rx_chain != NULL && len > 0) {
struct pbuf *seg = cs->rx_chain;
size_t seg_len = (seg->len - cs->rx_offset);
size_t copy_len = MIN(len, seg_len);
pbuf_copy_partial(seg, bufp, copy_len, cs->rx_offset);
len -= copy_len;
res += copy_len;
bufp += copy_len;
cs->rx_offset += copy_len;
if (cs->rx_offset == cs->rx_chain->len) {
cs->rx_chain = pbuf_dechain(cs->rx_chain);
pbuf_free(seg);
cs->rx_offset = 0;
}
}
mgos_unlock();
if (res > 0) {
struct tcp_recved_ctx ctx = {.tpcb = cs->pcb.tcp, .len = res};
mg_lwip_netif_run_on_tcpip(tcp_recved_tcpip, &ctx);
}
return res;
}
int mg_lwip_if_create_conn(struct mg_connection *nc) {
struct mg_lwip_conn_state *cs =
(struct mg_lwip_conn_state *) MG_CALLOC(1, sizeof(*cs));
if (cs == NULL) return 0;
cs->nc = nc;
nc->sock = (intptr_t) cs;
return 1;
}
static void udp_remove_tcpip(void *arg) {
udp_remove((struct udp_pcb *) arg);
}
void mg_lwip_if_destroy_conn(struct mg_connection *nc) {
if (nc->sock == INVALID_SOCKET) return;
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
if (!(nc->flags & MG_F_UDP)) {
struct tcp_pcb *tpcb = cs->pcb.tcp;
if (tpcb != NULL) {
tcp_arg(tpcb, NULL);
DBG(("%p tcp_close %p", (void*)nc, (void*)tpcb));
tcp_arg(tpcb, NULL);
mg_lwip_netif_run_on_tcpip(tcp_close_tcpip, tpcb);
}
while (cs->rx_chain != NULL) {
struct pbuf *seg = cs->rx_chain;
cs->rx_chain = pbuf_dechain(cs->rx_chain);
pbuf_free(seg);
}
memset(cs, 0, sizeof(*cs));
MG_FREE(cs);
} else if (nc->listener == NULL) {
/* Only close outgoing UDP pcb or listeners. */
struct udp_pcb *upcb = cs->pcb.udp;
if (upcb != NULL) {
DBG(("%p udp_remove %p", (void*)nc, (void*)upcb));
mg_lwip_netif_run_on_tcpip(udp_remove_tcpip, upcb);
}
memset(cs, 0, sizeof(*cs));
MG_FREE(cs);
}
nc->sock = INVALID_SOCKET;
}
void mg_lwip_if_get_conn_addr(struct mg_connection *nc, int remote,
union socket_address *sa) {
memset(sa, 0, sizeof(*sa));
if (nc == NULL || nc->sock == INVALID_SOCKET) return;
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
if (nc->flags & MG_F_UDP) {
struct udp_pcb *upcb = cs->pcb.udp;
if (remote) {
memcpy(sa, &nc->sa, sizeof(*sa));
} else if (upcb != NULL) {
sa->sin.sin_port = htons(upcb->local_port);
SET_ADDR(sa, &upcb->local_ip);
}
} else {
struct tcp_pcb *tpcb = cs->pcb.tcp;
if (remote) {
memcpy(sa, &nc->sa, sizeof(*sa));
} else if (tpcb != NULL) {
sa->sin.sin_port = htons(tpcb->local_port);
SET_ADDR(sa, &tpcb->local_ip);
}
}
}
void mg_lwip_if_sock_set(struct mg_connection *nc, sock_t sock) {
nc->sock = sock;
}
/* clang-format off */
#define MG_LWIP_IFACE_VTABLE \
{ \
mg_lwip_if_init, \
mg_lwip_if_free, \
mg_lwip_if_add_conn, \
mg_lwip_if_remove_conn, \
mg_lwip_if_poll, \
mg_lwip_if_listen_tcp, \
mg_lwip_if_listen_udp, \
mg_lwip_if_connect_tcp, \
mg_lwip_if_connect_udp, \
mg_lwip_if_tcp_send, \
mg_lwip_if_udp_send, \
mg_lwip_if_tcp_recv, \
mg_lwip_if_udp_recv, \
mg_lwip_if_create_conn, \
mg_lwip_if_destroy_conn, \
mg_lwip_if_sock_set, \
mg_lwip_if_get_conn_addr, \
}
/* clang-format on */
const struct mg_iface_vtable mg_lwip_iface_vtable = MG_LWIP_IFACE_VTABLE;
#if MG_NET_IF == MG_NET_IF_LWIP_LOW_LEVEL
const struct mg_iface_vtable mg_default_iface_vtable = MG_LWIP_IFACE_VTABLE;
#endif
#endif /* MG_ENABLE_NET_IF_LWIP_LOW_LEVEL */
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/lwip/mg_lwip_ev_mgr.c"
#endif
#if MG_NET_IF == MG_NET_IF_LWIP_LOW_LEVEL
#ifndef MG_SIG_QUEUE_LEN
#define MG_SIG_QUEUE_LEN 32
#endif
struct mg_ev_mgr_lwip_signal {
int sig;
struct mg_connection *nc;
};
struct mg_ev_mgr_lwip_data {
struct mg_ev_mgr_lwip_signal sig_queue[MG_SIG_QUEUE_LEN];
int sig_queue_len;
int start_index;
};
void mg_lwip_post_signal(enum mg_sig_type sig, struct mg_connection *nc) {
struct mg_ev_mgr_lwip_data *md =
(struct mg_ev_mgr_lwip_data *) nc->iface->data;
mgos_lock();
if (md->sig_queue_len >= MG_SIG_QUEUE_LEN) {
mgos_unlock();
return;
}
int end_index = (md->start_index + md->sig_queue_len) % MG_SIG_QUEUE_LEN;
md->sig_queue[end_index].sig = sig;
md->sig_queue[end_index].nc = nc;
md->sig_queue_len++;
mg_lwip_mgr_schedule_poll(nc->mgr);
mgos_unlock();
}
void mg_ev_mgr_lwip_process_signals(struct mg_mgr *mgr) {
struct mg_ev_mgr_lwip_data *md =
(struct mg_ev_mgr_lwip_data *) mgr->ifaces[MG_MAIN_IFACE]->data;
while (md->sig_queue_len > 0) {
mgos_lock();
int i = md->start_index;
int sig = md->sig_queue[i].sig;
struct mg_connection *nc = md->sig_queue[i].nc;
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
md->start_index = (i + 1) % MG_SIG_QUEUE_LEN;
md->sig_queue_len--;
mgos_unlock();
if (nc->iface == NULL || nc->mgr == NULL) continue;
switch (sig) {
case MG_SIG_CONNECT_RESULT: {
mg_if_connect_cb(nc, cs->err);
break;
}
case MG_SIG_CLOSE_CONN: {
mg_close_conn(nc);
break;
}
case MG_SIG_RECV: {
cs->recv_pending = 0;
mg_if_can_recv_cb(nc);
mbuf_trim(&nc->recv_mbuf);
break;
}
case MG_SIG_TOMBSTONE: {
break;
}
case MG_SIG_ACCEPT: {
mg_lwip_handle_accept(nc);
break;
}
}
}
}
void mg_lwip_if_init(struct mg_iface *iface) {
LOG(LL_INFO, ("Mongoose %s, LwIP %u.%u.%u", MG_VERSION, LWIP_VERSION_MAJOR,
LWIP_VERSION_MINOR, LWIP_VERSION_REVISION));
iface->data = MG_CALLOC(1, sizeof(struct mg_ev_mgr_lwip_data));
#if !NO_SYS && !LWIP_TCPIP_CORE_LOCKING
sys_sem_new(&s_tcpip_call_lock_sem, 1);
sys_sem_new(&s_tcpip_call_sync_sem, 0);
#endif
}
void mg_lwip_if_free(struct mg_iface *iface) {
MG_FREE(iface->data);
iface->data = NULL;
}
void mg_lwip_if_add_conn(struct mg_connection *nc) {
(void) nc;
}
void mg_lwip_if_remove_conn(struct mg_connection *nc) {
struct mg_ev_mgr_lwip_data *md =
(struct mg_ev_mgr_lwip_data *) nc->iface->data;
/* Walk the queue and null-out further signals for this conn. */
for (int i = 0; i < MG_SIG_QUEUE_LEN; i++) {
if (md->sig_queue[i].nc == nc) {
md->sig_queue[i].sig = MG_SIG_TOMBSTONE;
}
}
}
time_t mg_lwip_if_poll(struct mg_iface *iface, int timeout_ms) {
struct mg_mgr *mgr = iface->mgr;
int n = 0;
double now = mg_time();
struct mg_connection *nc, *tmp;
double min_timer = 0;
int num_timers = 0;
#if 0
DBG(("begin poll @%u", (unsigned int) (now * 1000)));
#endif
mg_ev_mgr_lwip_process_signals(mgr);
for (nc = mgr->active_connections; nc != NULL; nc = tmp) {
struct mg_lwip_conn_state *cs = (struct mg_lwip_conn_state *) nc->sock;
tmp = nc->next;
n++;
if (!mg_if_poll(nc, now)) continue;
if (nc->sock != INVALID_SOCKET &&
!(nc->flags & (MG_F_UDP | MG_F_LISTENING)) && cs->pcb.tcp != NULL &&
cs->pcb.tcp->unsent != NULL) {
mg_lwip_netif_run_on_tcpip(tcp_output_tcpip, cs->pcb.tcp);
}
if (nc->ev_timer_time > 0) {
if (num_timers == 0 || nc->ev_timer_time < min_timer) {
min_timer = nc->ev_timer_time;
}
num_timers++;
}
if (nc->sock != INVALID_SOCKET) {
if (mg_lwip_if_can_send(nc, cs)) {
mg_if_can_send_cb(nc);
mbuf_trim(&nc->send_mbuf);
}
if (cs->rx_chain != NULL) {
mg_if_can_recv_cb(nc);
} else if (cs->draining_rx_chain) {
/*
* If the connection is about to close, and rx_chain is finally empty,
* send the MG_SIG_CLOSE_CONN signal
*/
mg_lwip_post_signal(MG_SIG_CLOSE_CONN, nc);
}
}
}
#if 0
DBG(("end poll @%u, %d conns, %d timers (min %u), next in %d ms",
(unsigned int) (now * 1000), n, num_timers,
(unsigned int) (min_timer * 1000), timeout_ms));
#endif
(void) timeout_ms;
return now;
}
#endif /* MG_NET_IF == MG_NET_IF_LWIP_LOW_LEVEL */
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/wince/wince_libc.c"
#endif
#ifdef WINCE
const char *strerror(int err) {
/*
* TODO(alashkin): there is no strerror on WinCE;
* look for similar wce_xxxx function
*/
static char buf[10];
snprintf(buf, sizeof(buf), "%d", err);
return buf;
}
int open(const char *filename, int oflag, int pmode) {
/*
* TODO(alashkin): mg_open function is not used in mongoose
* but exists in documentation as utility function
* Shall we delete it at all or implement for WinCE as well?
*/
DebugBreak();
return 0; /* for compiler */
}
int _wstati64(const wchar_t *path, cs_stat_t *st) {
DWORD fa = GetFileAttributesW(path);
if (fa == INVALID_FILE_ATTRIBUTES) {
return -1;
}
memset(st, 0, sizeof(*st));
if ((fa & FILE_ATTRIBUTE_DIRECTORY) == 0) {
HANDLE h;
FILETIME ftime;
st->st_mode |= _S_IFREG;
h = CreateFileW(path, GENERIC_READ, 0, NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL, NULL);
if (h == INVALID_HANDLE_VALUE) {
return -1;
}
st->st_size = GetFileSize(h, NULL);
GetFileTime(h, NULL, NULL, &ftime);
st->st_mtime = (uint32_t)((((uint64_t) ftime.dwLowDateTime +
((uint64_t) ftime.dwHighDateTime << 32)) /
10000000.0) -
11644473600);
CloseHandle(h);
} else {
st->st_mode |= _S_IFDIR;
}
return 0;
}
/* Windows CE doesn't have neither gmtime nor strftime */
static void mg_gmt_time_string(char *buf, size_t buf_len, time_t *t) {
FILETIME ft;
SYSTEMTIME systime;
if (t != NULL) {
uint64_t filetime = (*t + 11644473600) * 10000000;
ft.dwLowDateTime = filetime & 0xFFFFFFFF;
ft.dwHighDateTime = (filetime & 0xFFFFFFFF00000000) >> 32;
FileTimeToSystemTime(&ft, &systime);
} else {
GetSystemTime(&systime);
}
/* There is no PRIu16 in WinCE SDK */
snprintf(buf, buf_len, "%d.%d.%d %d:%d:%d GMT", (int) systime.wYear,
(int) systime.wMonth, (int) systime.wDay, (int) systime.wHour,
(int) systime.wMinute, (int) systime.wSecond);
}
#endif
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/pic32/pic32_net_if.h"
#endif
#ifndef CS_COMMON_PLATFORMS_PIC32_NET_IF_H_
#define CS_COMMON_PLATFORMS_PIC32_NET_IF_H_
/* Amalgamated: #include "mongoose/src/net_if.h" */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#ifndef MG_ENABLE_NET_IF_PIC32
#define MG_ENABLE_NET_IF_PIC32 MG_NET_IF == MG_NET_IF_PIC32
#endif
extern const struct mg_iface_vtable mg_pic32_iface_vtable;
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* CS_COMMON_PLATFORMS_PIC32_NET_IF_H_ */
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/pic32/pic32_net_if.c"
#endif
#if MG_ENABLE_NET_IF_PIC32
int mg_pic32_if_create_conn(struct mg_connection *nc) {
(void) nc;
return 1;
}
void mg_pic32_if_recved(struct mg_connection *nc, size_t len) {
(void) nc;
(void) len;
}
void mg_pic32_if_add_conn(struct mg_connection *nc) {
(void) nc;
}
void mg_pic32_if_init(struct mg_iface *iface) {
(void) iface;
(void) mg_get_errno(); /* Shutup compiler */
}
void mg_pic32_if_free(struct mg_iface *iface) {
(void) iface;
}
void mg_pic32_if_remove_conn(struct mg_connection *nc) {
(void) nc;
}
void mg_pic32_if_destroy_conn(struct mg_connection *nc) {
if (nc->sock == INVALID_SOCKET) return;
/* For UDP, only close outgoing sockets or listeners. */
if (!(nc->flags & MG_F_UDP)) {
/* Close TCP */
TCPIP_TCP_Close((TCP_SOCKET) nc->sock);
} else if (nc->listener == NULL) {
/* Only close outgoing UDP or listeners. */
TCPIP_UDP_Close((UDP_SOCKET) nc->sock);
}
nc->sock = INVALID_SOCKET;
}
int mg_pic32_if_listen_udp(struct mg_connection *nc, union socket_address *sa) {
nc->sock = TCPIP_UDP_ServerOpen(
sa->sin.sin_family == AF_INET ? IP_ADDRESS_TYPE_IPV4
: IP_ADDRESS_TYPE_IPV6,
ntohs(sa->sin.sin_port),
sa->sin.sin_addr.s_addr == 0 ? 0 : (IP_MULTI_ADDRESS *) &sa->sin);
if (nc->sock == INVALID_SOCKET) {
return -1;
}
return 0;
}
void mg_pic32_if_udp_send(struct mg_connection *nc, const void *buf,
size_t len) {
mbuf_append(&nc->send_mbuf, buf, len);
}
void mg_pic32_if_tcp_send(struct mg_connection *nc, const void *buf,
size_t len) {
mbuf_append(&nc->send_mbuf, buf, len);
}
int mg_pic32_if_listen_tcp(struct mg_connection *nc, union socket_address *sa) {
nc->sock = TCPIP_TCP_ServerOpen(
sa->sin.sin_family == AF_INET ? IP_ADDRESS_TYPE_IPV4
: IP_ADDRESS_TYPE_IPV6,
ntohs(sa->sin.sin_port),
sa->sin.sin_addr.s_addr == 0 ? 0 : (IP_MULTI_ADDRESS *) &sa->sin);
memcpy(&nc->sa, sa, sizeof(*sa));
if (nc->sock == INVALID_SOCKET) {
return -1;
}
return 0;
}
static int mg_accept_conn(struct mg_connection *lc) {
struct mg_connection *nc;
TCP_SOCKET_INFO si;
union socket_address sa;
nc = mg_if_accept_new_conn(lc);
if (nc == NULL) {
return 0;
}
nc->sock = lc->sock;
nc->flags &= ~MG_F_LISTENING;
if (!TCPIP_TCP_SocketInfoGet((TCP_SOCKET) nc->sock, &si)) {
return 0;
}
if (si.addressType == IP_ADDRESS_TYPE_IPV4) {
sa.sin.sin_family = AF_INET;
sa.sin.sin_port = htons(si.remotePort);
sa.sin.sin_addr.s_addr = si.remoteIPaddress.v4Add.Val;
} else {
/* TODO(alashkin): do something with _potential_ IPv6 */
memset(&sa, 0, sizeof(sa));
}
mg_if_accept_tcp_cb(nc, (union socket_address *) &sa, sizeof(sa));
return mg_pic32_if_listen_tcp(lc, &lc->sa) >= 0;
}
char *inet_ntoa(struct in_addr in) {
static char addr[17];
snprintf(addr, sizeof(addr), "%d.%d.%d.%d", (int) in.S_un.S_un_b.s_b1,
(int) in.S_un.S_un_b.s_b2, (int) in.S_un.S_un_b.s_b3,
(int) in.S_un.S_un_b.s_b4);
return addr;
}
static void mg_handle_send(struct mg_connection *nc) {
uint16_t bytes_written = 0;
if (nc->flags & MG_F_UDP) {
if (!TCPIP_UDP_RemoteBind(
(UDP_SOCKET) nc->sock,
nc->sa.sin.sin_family == AF_INET ? IP_ADDRESS_TYPE_IPV4
: IP_ADDRESS_TYPE_IPV6,
ntohs(nc->sa.sin.sin_port), (IP_MULTI_ADDRESS *) &nc->sa.sin)) {
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
return;
}
bytes_written = TCPIP_UDP_TxPutIsReady((UDP_SOCKET) nc->sock, 0);
if (bytes_written >= nc->send_mbuf.len) {
if (TCPIP_UDP_ArrayPut((UDP_SOCKET) nc->sock,
(uint8_t *) nc->send_mbuf.buf,
nc->send_mbuf.len) != nc->send_mbuf.len) {
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
bytes_written = 0;
}
}
} else {
bytes_written = TCPIP_TCP_FifoTxFreeGet((TCP_SOCKET) nc->sock);
if (bytes_written != 0) {
if (bytes_written > nc->send_mbuf.len) {
bytes_written = nc->send_mbuf.len;
}
if (TCPIP_TCP_ArrayPut((TCP_SOCKET) nc->sock,
(uint8_t *) nc->send_mbuf.buf,
bytes_written) != bytes_written) {
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
bytes_written = 0;
}
}
}
mg_if_sent_cb(nc, bytes_written);
}
static void mg_handle_recv(struct mg_connection *nc) {
uint16_t bytes_read = 0;
uint8_t *buf = NULL;
if (nc->flags & MG_F_UDP) {
bytes_read = TCPIP_UDP_GetIsReady((UDP_SOCKET) nc->sock);
if (bytes_read != 0 &&
(nc->recv_mbuf_limit == -1 ||
nc->recv_mbuf.len + bytes_read < nc->recv_mbuf_limit)) {
buf = (uint8_t *) MG_MALLOC(bytes_read);
if (TCPIP_UDP_ArrayGet((UDP_SOCKET) nc->sock, buf, bytes_read) !=
bytes_read) {
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
bytes_read = 0;
MG_FREE(buf);
}
}
} else {
bytes_read = TCPIP_TCP_GetIsReady((TCP_SOCKET) nc->sock);
if (bytes_read != 0) {
if (nc->recv_mbuf_limit != -1 &&
nc->recv_mbuf_limit - nc->recv_mbuf.len > bytes_read) {
bytes_read = nc->recv_mbuf_limit - nc->recv_mbuf.len;
}
buf = (uint8_t *) MG_MALLOC(bytes_read);
if (TCPIP_TCP_ArrayGet((TCP_SOCKET) nc->sock, buf, bytes_read) !=
bytes_read) {
nc->flags |= MG_F_CLOSE_IMMEDIATELY;
MG_FREE(buf);
bytes_read = 0;
}
}
}
if (bytes_read != 0) {
mg_if_recv_tcp_cb(nc, buf, bytes_read, 1 /* own */);
}
}
time_t mg_pic32_if_poll(struct mg_iface *iface, int timeout_ms) {
struct mg_mgr *mgr = iface->mgr;
double now = mg_time();
struct mg_connection *nc, *tmp;
for (nc = mgr->active_connections; nc != NULL; nc = tmp) {
tmp = nc->next;
if (nc->flags & MG_F_CONNECTING) {
/* processing connections */
if (nc->flags & MG_F_UDP ||
TCPIP_TCP_IsConnected((TCP_SOCKET) nc->sock)) {
mg_if_connect_cb(nc, 0);
}
} else if (nc->flags & MG_F_LISTENING) {
if (TCPIP_TCP_IsConnected((TCP_SOCKET) nc->sock)) {
/* accept new connections */
mg_accept_conn(nc);
}
} else {
if (nc->send_mbuf.len != 0) {
mg_handle_send(nc);
}
if (nc->recv_mbuf_limit == -1 ||
nc->recv_mbuf.len < nc->recv_mbuf_limit) {
mg_handle_recv(nc);
}
}
}
for (nc = mgr->active_connections; nc != NULL; nc = tmp) {
tmp = nc->next;
if ((nc->flags & MG_F_CLOSE_IMMEDIATELY) ||
(nc->send_mbuf.len == 0 && (nc->flags & MG_F_SEND_AND_CLOSE))) {
mg_close_conn(nc);
}
}
return now;
}
void mg_pic32_if_sock_set(struct mg_connection *nc, sock_t sock) {
nc->sock = sock;
}
void mg_pic32_if_get_conn_addr(struct mg_connection *nc, int remote,
union socket_address *sa) {
/* TODO(alaskin): not implemented yet */
}
void mg_pic32_if_connect_tcp(struct mg_connection *nc,
const union socket_address *sa) {
nc->sock = TCPIP_TCP_ClientOpen(
sa->sin.sin_family == AF_INET ? IP_ADDRESS_TYPE_IPV4
: IP_ADDRESS_TYPE_IPV6,
ntohs(sa->sin.sin_port), (IP_MULTI_ADDRESS *) &sa->sin);
nc->err = (nc->sock == INVALID_SOCKET) ? -1 : 0;
}
void mg_pic32_if_connect_udp(struct mg_connection *nc) {
nc->sock = TCPIP_UDP_ClientOpen(IP_ADDRESS_TYPE_ANY, 0, NULL);
nc->err = (nc->sock == INVALID_SOCKET) ? -1 : 0;
}
/* clang-format off */
#define MG_PIC32_IFACE_VTABLE \
{ \
mg_pic32_if_init, \
mg_pic32_if_free, \
mg_pic32_if_add_conn, \
mg_pic32_if_remove_conn, \
mg_pic32_if_poll, \
mg_pic32_if_listen_tcp, \
mg_pic32_if_listen_udp, \
mg_pic32_if_connect_tcp, \
mg_pic32_if_connect_udp, \
mg_pic32_if_tcp_send, \
mg_pic32_if_udp_send, \
mg_pic32_if_recved, \
mg_pic32_if_create_conn, \
mg_pic32_if_destroy_conn, \
mg_pic32_if_sock_set, \
mg_pic32_if_get_conn_addr, \
}
/* clang-format on */
const struct mg_iface_vtable mg_pic32_iface_vtable = MG_PIC32_IFACE_VTABLE;
#if MG_NET_IF == MG_NET_IF_PIC32
const struct mg_iface_vtable mg_default_iface_vtable = MG_PIC32_IFACE_VTABLE;
#endif
#endif /* MG_ENABLE_NET_IF_PIC32 */
#ifdef MG_MODULE_LINES
#line 1 "src/common/platforms/windows/windows_direct.c"
#endif
#ifdef _WIN32
int rmdir(const char *dirname) {
return _rmdir(dirname);
}
unsigned int sleep(unsigned int seconds) {
Sleep(seconds * 1000);
return 0;
}
#endif /* _WIN32 */