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Annotation of embedaddon/igmpproxy/src/udpsock.c, revision 1.1.1.1

1.1       misho       1: /*
                      2: **  igmpproxy - IGMP proxy based multicast router 
                      3: **  Copyright (C) 2005 Johnny Egeland <johnny@rlo.org>
                      4: **
                      5: **  This program is free software; you can redistribute it and/or modify
                      6: **  it under the terms of the GNU General Public License as published by
                      7: **  the Free Software Foundation; either version 2 of the License, or
                      8: **  (at your option) any later version.
                      9: **
                     10: **  This program is distributed in the hope that it will be useful,
                     11: **  but WITHOUT ANY WARRANTY; without even the implied warranty of
                     12: **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     13: **  GNU General Public License for more details.
                     14: **
                     15: **  You should have received a copy of the GNU General Public License
                     16: **  along with this program; if not, write to the Free Software
                     17: **  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     18: **
                     19: **----------------------------------------------------------------------------
                     20: **
                     21: **  This software is derived work from the following software. The original
                     22: **  source code has been modified from it's original state by the author
                     23: **  of igmpproxy.
                     24: **
                     25: **  smcroute 0.92 - Copyright (C) 2001 Carsten Schill <carsten@cschill.de>
                     26: **  - Licensed under the GNU General Public License, version 2
                     27: **  
                     28: **  mrouted 3.9-beta3 - COPYRIGHT 1989 by The Board of Trustees of 
                     29: **  Leland Stanford Junior University.
                     30: **  - Original license can be found in the Stanford.txt file.
                     31: **
                     32: */
                     33: /**
                     34: *   udpsock.c contains function for creating a UDP socket.
                     35: *
                     36: */
                     37: 
                     38: #include "igmpproxy.h"
                     39: 
                     40: /**
                     41: *  Creates and connects a simple UDP socket to the target 
                     42: *  'PeerInAdr':'PeerPort'
                     43: *
                     44: *   @param PeerInAdr - The address to connect to
                     45: *   @param PeerPort  - The port to connect to
                     46: *           
                     47: */
                     48: int openUdpSocket( uint32_t PeerInAdr, uint16_t PeerPort ) {
                     49:     int Sock;
                     50:     struct sockaddr_in SockAdr;
                     51:     
                     52:     if( (Sock = socket( AF_INET, SOCK_RAW, IPPROTO_IGMP )) < 0 )
                     53:         my_log( LOG_ERR, errno, "UDP socket open" );
                     54:     
                     55:     memset( &SockAdr, 0, sizeof( SockAdr ) );
                     56:     SockAdr.sin_family      = AF_INET;
                     57:     SockAdr.sin_port        = htons(PeerPort);
                     58:     SockAdr.sin_addr.s_addr = htonl(PeerInAdr);
                     59:     
                     60:     if( bind( Sock, (struct sockaddr *)&SockAdr, sizeof( SockAdr ) ) )
                     61:         my_log( LOG_ERR, errno, "UDP socket bind" );
                     62:     
                     63:     return Sock;
                     64: }
                     65: