pslistener.cxx

SIP（Session Initiation Protocol）是由IETF定义

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static const char* const PSListener_cxx_Version =
    "$Id: PSListener.cxx,v 1.13.8.1 2003/01/23 02:50:05 sprajpat Exp $";

#include "PSListener.hxx"

#include <sys/time.h>
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include "Sptr.hxx"
#include "Tcp_ServerSocket.hxx"
#include "Connection.hxx"
#include "cpLog.h"
#include "VNetworkException.hxx"
#include "Vpp_def.h"
#include "VEnvVar.hxx"
#include "ProvisionInterface.hxx"


void*
PSListener::runThr(void* args)
{
    PSListener* self = (PSListener*)args;
    self->run();
    return NULL;
}


void
PSListener::run()
{
    bool socketSuccessful = false;
    Sptr <TcpServerSocket> serverSocket;

    while ( ! socketSuccessful )
    {
        socketSuccessful = true;
        try
        {
            serverSocket = new TcpServerSocket(_listenerPort);
            _init = true;
        }
        catch ( VNetworkException )
        {
            // could not listen here, so retry
            sleep(1);
            _listenerPort++;
            socketSuccessful = false;  // redo

            cpLog(LOG_DEBUG, "Trying port %d", _listenerPort);
        }
    }

    if (socketSuccessful)
    {
        cpLog(LOG_ALERT, "Successfully opened listner port %d", _listenerPort);
    }
    else
    {
	// this never gets called, but i'm putting it in for future use
	cpLog(LOG_ALERT, "Could not open a listener port");
    }

    //Loop through for Incoming messages
    for (; ; )
    {
        Connection conn;
        try
        { 
        serverSocket->accept(conn);
        processUpdateRequest(conn);
        conn.close();
        }
        catch(VException& e)
        {
            cpLog(LOG_ERR, "Got network exception:%s", e.getDescription().c_str());
            _exitFlg = true;
        }
        if (_exitFlg) break;
    }
}


PSListener::~PSListener()
{
    _exitFlg = true;
}


PSListener::PSListener()
        : _exitFlg(false),
        _init(false)
{
    _listenerPort = VEnvVar::VLISTENER_PORT;
    pthread_create( &_ptid, 0, PSListener::runThr, (void*)this);
}


PSListener::PSListener(int port)
        : _exitFlg(false),
        _listenerPort(port),
        _init(false)
{
    pthread_create( &_ptid, 0, PSListener::runThr, (void*)this);
}


void
PSListener::processUpdateRequest(Connection& conn)
{
    char buf[MAXLINE];
    string dRead;
    buf[0] = '\0';
    int nread = 0;

    while (conn.readLine(buf, sizeof(buf), nread) > 0)
    {
        buf[nread] = 0;
        dRead = buf;
        char req[VPPREQ_BUF_LEN], group[URL_LENGTH], name[URL_LENGTH],
        rest[MAXLINE];
        sscanf(buf, "%s%s%s%s", req, group, name, rest);
        string vppReq;
        vppReq = req;

        cpLog(LOG_DEBUG, "Processing update request: (%s)",
              buf);

        if (vppReq == string(UPDATEITEM_REQ))
        {
            ProvisionInterface::instance().
            sendUpdateNotification(group, name);
        }
        else if (vppReq == string(REGISTER_ITEM_REQ))
        {
            ProvisionInterface::instance().
            sendUpdateNotification(group, name);
        }

        else if (vppReq == string(DELITEM_REQ))
        {
            ProvisionInterface::instance().
            sendDeleteNotification(group, name);
        }

        else if (vppReq == string(UPDATEGROUP_REQ))
        {
            ProvisionInterface::instance().
            sendUpdateNotification(group, name, false);
        }

        else if (vppReq == string(DELGROUP_REQ))
        {
            ProvisionInterface::instance().
            sendUpdateNotification(group, name, true);
        }

        buf[0] = '\0';
        nread = 0;
        dRead = "";
    }
}


int
PSListener::getListenerPort() const
{
    while (!_init)
    {
        cpLog(LOG_INFO, "PSLIB: PSListener is not initialized waiting..");
        sleep(1);
    }

    return _listenerPort;
}


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