90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <uuid/uuid.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <arpa/inet.h>
|
|
#include <unistd.h>
|
|
#include <netdb.h>
|
|
#include <errno.h>
|
|
|
|
#include <logger.h>
|
|
#include <handlers.h>
|
|
#include <helpers.h>
|
|
#include <mpack.h>
|
|
#include <enums.h>
|
|
|
|
void
|
|
handler_discovery(int fd, controller_t *controller)
|
|
{
|
|
ssize_t bytes_transferred;
|
|
uint16_t discovery_answer_port;
|
|
struct sockaddr_in si_other;
|
|
socklen_t slen = sizeof(si_other);
|
|
|
|
if((bytes_transferred = recvfrom(fd, &discovery_answer_port, sizeof(discovery_answer_port), 0, (struct sockaddr *) &si_other, &slen)) <= 0)
|
|
{
|
|
LOG_ERROR("received invalid discovery from %s\n", inet_ntoa(si_other.sin_addr));
|
|
return;
|
|
}
|
|
LOG_INFO("received discovery from %s:%d\n", inet_ntoa(si_other.sin_addr), discovery_answer_port);
|
|
|
|
if(discovery_answer_port == 0)
|
|
{
|
|
LOG_ERROR("invalid port received\n");
|
|
return;
|
|
}
|
|
|
|
char* payload;
|
|
size_t payload_size;
|
|
mpack_writer_t writer;
|
|
mpack_writer_init_growable(&writer, &payload, &payload_size);
|
|
|
|
mpack_start_map(&writer, 4);
|
|
mpack_write_uint(&writer, DISCOVERY_MAPPING_ID);
|
|
mpack_write_bin(&writer, (char*)controller->id, sizeof(uuid_t));
|
|
mpack_write_uint(&writer, DISCOVERY_MAPPING_COMMAND_PORT);
|
|
mpack_write_u16(&writer, controller->command_port);
|
|
mpack_write_uint(&writer, DISCOVERY_MAPPING_RELAY_COUNT);
|
|
mpack_write_u8(&writer, controller->relay_count);
|
|
mpack_write_uint(&writer, DISCOVERY_MAPPING_NAME);
|
|
mpack_write_cstr(&writer, controller->name);
|
|
mpack_finish_map(&writer);
|
|
|
|
// finish writing
|
|
if(mpack_writer_destroy(&writer) != mpack_ok)
|
|
{
|
|
LOG_ERROR("error writing discovery answer payload\n");
|
|
return;
|
|
|
|
}
|
|
|
|
int fd_answer = helper_connect_tcp_server(inet_ntoa(si_other.sin_addr), discovery_answer_port);
|
|
if(fd_answer == -1)
|
|
{
|
|
LOG_ERROR("error during connecting\n");
|
|
free(payload);
|
|
return;
|
|
}
|
|
|
|
if((bytes_transferred = send(fd_answer, &payload_size, sizeof(payload_size), 0)) <= 0)
|
|
{
|
|
LOG_ERROR("error during sending\n");
|
|
free(payload);
|
|
close(fd_answer);
|
|
return;
|
|
}
|
|
if((bytes_transferred = send(fd_answer, payload, payload_size, 0)) <= 0)
|
|
{
|
|
LOG_ERROR("error during sending\n");
|
|
free(payload);
|
|
close(fd_answer);
|
|
return;
|
|
}
|
|
|
|
free(payload);
|
|
close(fd_answer);
|
|
}
|