neocomm/src/connection.c

/*
 * Copyright (C) 2017  Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net>
 * Author: Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net>
 *
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/>.
 */

#include "neocomm/connection.h"

#include "internal_error.h"

#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <strings.h>
#include <stdio.h>

int NeoComm_bind(const unsigned short port) {
	int sockfd;//, newsockfd;
	struct sockaddr_in serv_addr;

	sockfd = socket(AF_INET, SOCK_STREAM, 0);
	if(sockfd < 0)
	{
		if(errno == EACCES)
			NeoComm_error("Insufficient privileges");
		else if(errno == ENOBUFS)
			NeoComm_error("Insufficient resources available");
		else if(errno == ENOMEM)
			NeoComm_error("Insufficient memory to open socket");
		else
		{
			char error_msg[128];
			snprintf(error_msg, 128,
					"Failed to initiate socket with errno `%d'", errno);
			NeoComm_error(error_msg);
		}
		return 0;
	}
	bzero((char*) &serv_addr, sizeof(serv_addr));
	serv_addr.sin_family = AF_INET;
	serv_addr.sin_port = htons(port);
	serv_addr.sin_addr.s_addr = INADDR_ANY;
	if(bind(sockfd, (struct sockaddr*) &serv_addr, sizeof(serv_addr)) < 0)
	{
		if(errno == EADDRINUSE)
			NeoComm_error("Address in use");
		else if(errno == EADDRNOTAVAIL)
			NeoComm_error("Address unavailable on system");
		else if(errno == EAFNOSUPPORT)
			NeoComm_error("Unsupported address family for socket");
		else if(errno == EALREADY)
			NeoComm_error("Assignment request already exists for socket");
		else if(errno == EINVAL)
			NeoComm_error("Socket already bound");
		else if(errno == ENOBUFS)
			NeoComm_error("Insufficient resources");
		else if(errno == EACCES)
			NeoComm_error("Insufficient priviliges");
		else
		{
			char error_msg[128];
			snprintf(error_msg, 128,
					"Failed to bind to socket with errno `%d'", errno);
			NeoComm_error(error_msg);
		}
		return 0;
	}

	listen(sockfd, 5);
	return 1;
}