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