udp_server.cxx

mgcp协议源代码。支持多种编码：g711

/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 
 * 3. The names "VOCAL", "Vovida Open Communication Application Library",
 *    and "Vovida Open Communication Application Library (VOCAL)" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact [e-mail].
 *
 * 4. Products derived from this software may not be called "VOCAL", nor
 *    may "VOCAL" appear in their name, without prior written
 *    permission of Vovida Networks, Inc.
 * 
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
 * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL VOVIDA
 * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
 * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 * 
 * ====================================================================
 * 
 * This software consists of voluntary contributions made by Vovida
 * Networks, Inc. and many individuals on behalf of Vovida Networks,
 * Inc.  For more information on Vovida Networks, Inc., please see
 * <http://www.vovida.org/>.
 *
 */
static const char* const udp_server_cxx_Version =
    "$Id: udp_server.cxx,v 1.6 2000/12/18 23:42:39 bko Exp $";
#ifdef __vxworks

/* udpServer.c - UDP server example */

/*
DESCRIPTION
This file contains the server-side of the VxWorks UDP example code.
The example code demonstrates the useage of several BSD 4.3-style
socket routine calls.
*/

/* includes */

#include "vxWorks.h"
#include "sockLib.h"
#include "inetLib.h"
#include "stdioLib.h"
#include "strLib.h"
#include "ioLib.h"
#include "fioLib.h"
#include "udpExample.h"
#include "resolvLib.h"

/*********************************************************************
         *
         * udpServer - read from UDP socket and display client's message if requested 
         *
         * Example of VxWorks UDP server:
         *       -> sp udpServer
         *       task spawned: id = 0x3a1f6c, name = t2
         *       value = 3809132 = 0x3a1f6c
         *       -> MESSAGE FROM CLIENT (Internet Address 150.12.0.11, port 1028):
         *       Greetings from UDP client
         *
         * RETURNS: Never, or ERROR if a resources could not be allocated.
         */

STATUS udpServer (void)
{
#ifdef __vxworks
    int rc = resolvInit ("192.168.5.254", "private.vovida.com", 0);
#endif

    struct sockaddr_in serverAddr;     /* server's socket address */
    struct sockaddr_in clientAddr;     /* client's socket address */
    struct request clientRequest;  /* request/Message from client */
    int sockAddrSize;   /* size of socket address structure */
    int sFd;            /* socket file descriptor */
    char inetAddr[INET_ADDR_LEN];
    /* buffer for client's inet addr */

    /* set up the local address */

    sockAddrSize = sizeof (struct sockaddr_in);
    bzero ((char *) &serverAddr, sockAddrSize);
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_port = htons (SERVER_PORT_NUM);
    serverAddr.sin_addr.s_addr = htonl (INADDR_ANY);

    /* create a UDP-based socket */

    if ((sFd = socket (AF_INET, SOCK_DGRAM, 0)) == ERROR)
    {
        perror ("socket");
        return (ERROR);
    }

    /* bind socket to local address */

    if (bind (sFd, (struct sockaddr *) &serverAddr, sockAddrSize) == ERROR)
    {
        perror ("bind");
        close (sFd);
        return (ERROR);
    }

    /* read data from a socket and satisfy requests */

    FOREVER
    {
        if (recvfrom (sFd, (char *) &clientRequest, sizeof (clientRequest), 0,
                      (struct sockaddr *) &clientAddr, &sockAddrSize) == ERROR)
    {
        perror ("recvfrom");
            close (sFd);
            return (ERROR);
        }

        /* if client requested that message be displayed, print it */

        if (1)
    {
        /* convert inet address to dot notation */

        inet_ntoa_b (clientAddr.sin_addr, inetAddr);
            printf ("MSG FROM CLIENT (Internet Address %s, port %d):\n%s\n",
                    inetAddr, ntohs (clientAddr.sin_port), clientRequest.message);
        }
    }
}

#else
int main()
{
    return 0;
}
#endif