/**

 * $Id$

 * 

 * Network support functions

 *

 * Copyright (c) 2009 Nathan Keynes.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 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 General Public License for more details.

 */

#include <string.h>

#include <unistd.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <errno.h>

#include "ioutil.h"

int io_create_server_socket(const char *interface, int port )

{

    struct sockaddr_in sin;

    int fd = socket(AF_INET, SOCK_STREAM, 0);

    if( fd == -1 ) {

        ERROR( "Failed to create TCP socket!" );

        return -1;

    }

    sin.sin_family = AF_INET;

    sin.sin_addr.s_addr = 0;

    sin.sin_port = htons(port);

    if( interface != NULL ) {

        if( !inet_aton(interface, &sin.sin_addr) ) {

            /* TODO: hostname lookup */

        }

    }

    if( bind( fd, (struct sockaddr *)&sin, sizeof(sin) ) != 0 ||

            listen(fd, 5) != 0 ) {

        close(fd);

        ERROR( "Failed to bind port %d (%s)", port, strerror(errno) );

        return -1;

    }

    return fd;

}