add: foreign key support in database

add: more tests
fix: bad tag handling when finding 0 in column

helpers/bind_server.c

@@ -1,52 +0,0 @@
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <netdb.h>
-#include <sys/socket.h>
-#include <sys/types.h>
-#include <errno.h>
-
-#include <logger.h>
-#include <helpers.h>
-
-int
-helper_bind_tcp_server(char* addr, uint16_t port, int max_client_backlog)
-{
-    char port_str[6];
-    sprintf(port_str, "%d", port);
-
-    struct addrinfo hints, *res;
-    int fd;
-    int status;
-
-    memset(&hints, 0, sizeof hints);
-    hints.ai_family = AF_UNSPEC;
-    hints.ai_socktype = SOCK_STREAM;
-    hints.ai_flags = AI_PASSIVE;
-
-    if ((status = getaddrinfo(addr, port_str, &hints, &res)) != 0)
-    {
-        LOG_ERROR("getaddrinfo: %s\n", gai_strerror(status));
-        return -1;
-    }
-
-    fd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
-
-    if ((status = bind(fd, res->ai_addr, res->ai_addrlen)) == -1)
-    {
-        LOG_ERROR("error binding socket: %s\n", strerror(errno));
-        freeaddrinfo(res);
-        return -1;
-    }
-
-    if ((status = listen(fd, max_client_backlog)) == -1)
-    {
-        LOG_ERROR("error setting up listener: %s\n", strerror(errno));
-        freeaddrinfo(res);
-        return -1;
-    }
-
-    freeaddrinfo(res);
-
-    return fd;
-}

helpers/get_port.c

@@ -1,24 +0,0 @@
-#include <sys/socket.h>
-#include <arpa/inet.h>
-#include <stdint.h>
-#include <errno.h>
-#include <string.h>
-
-#include <helpers.h>
-#include <logger.h>
-
-uint16_t
-helper_get_port(int sock)
-{
-    struct sockaddr_in sin;
-    socklen_t len = sizeof(sin);
-    if (getsockname(sock, (struct sockaddr *)&sin, &len) == -1)
-    {
-        LOG_ERROR("could not get socket name for port: %s\n", strerror(errno));
-        return 0;
-    }
-    else
-    {
-        return ntohs(sin.sin_port);
-    }
-}

helpers/open_discovery_socket.c

@@ -1,57 +0,0 @@
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <netdb.h>
-#include <sys/socket.h>
-
-#include <logger.h>
-#include <helpers.h>
-
-int
-helper_open_discovery_socket(uint16_t discovery_port)
-{
-    struct addrinfo hints, *res;
-    int fd, status;
-
-    memset(&hints, 0, sizeof hints);
-    hints.ai_family = AF_INET; // use ipv4
-    hints.ai_socktype = SOCK_DGRAM; //set socket flag
-    hints.ai_flags = AI_PASSIVE; // get my IP
-
-    char discovery_port_str[6];
-    sprintf(discovery_port_str, "%u", discovery_port);
-
-    //get connection info for our computer
-    if ((status = getaddrinfo(NULL, discovery_port_str, &hints, &res)) != 0)
-    {
-        LOG_FATAL("getaddrinfo: %s\n", gai_strerror(status));
-        freeaddrinfo(res);
-        exit(EXIT_FAILURE);
-    }
-
-    //creating socket
-    fd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
-    int yes = 1;
-
-    // lose the pesky "Address already in use" error message
-    if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) == -1)
-    {
-        LOG_FATAL("setsockopt: %s\n", strerror(errno));
-        freeaddrinfo(res);
-        exit(EXIT_FAILURE);
-    }
-
-    if (bind(fd, res->ai_addr, res->ai_addrlen) == -1)
-    {
-        LOG_FATAL("bind: %s\n", strerror(errno));
-        freeaddrinfo(res);
-        exit(EXIT_FAILURE);
-    }
-
-    freeaddrinfo(res);
-
-    LOG_INFO("opened discovery socket on port %u\n", discovery_port);
-
-    return fd;
-}