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igmpproxy

    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: