/**

  * $Id$

  * 

  * 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;

 }