pegasus/src/Pegasus/Common/HTTPAcceptor.cpp - diff

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Diff for /pegasus/src/Pegasus/Common/HTTPAcceptor.cpp between version 1.45.2.1 and 1.85

version 1.45.2.1, 2004/01/16 16:57:31

version 1.85, 2006/08/09 21:12:42

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//%2003////////////////////////////////////////////////////////////////////////

//%2006////////////////////////////////////////////////////////////////////////

// Company, L. P., IBM Corp., The Open Group, Tivoli Systems.

// Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.

// IBM Corp.; EMC Corporation, The Open Group.

// IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.

// EMC Corporation; VERITAS Software Corporation; The Open Group.

// EMC Corporation; Symantec Corporation; The Open Group.

// Permission is hereby granted, free of charge, to any person obtaining a copy

// of this software and associated documentation files (the "Software"), to

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// Nag Boranna, Hewlett-Packard Company (nagaraja_boranna@hp.com)

// Dave Rosckes (rosckes@us.ibm.com)

// Denise Eckstein (denise.eckstein@hp.com)

// Alagaraja Ramasubramanian (alags_raj@in.ibm.com) for Bug#1090

// Amit Arora, IBM (amita@in.ibm.com) for Bug#2541

// Roger Kumpf, Hewlett-Packard Company (roger_kumpf@hp.com)

// Sean Keenan, Hewlett-Packard Company (sean.keenan@hp.com)

// Josephine Eskaline Joyce, IBM (jojustin@in.ibm.com) for Bug#2065

// David Dillard, Symantec Corp. (david_dillard@symantec.com)

// John Alex, IBM (johnalex@us.ibm.com) for Bug#3312

//%/////////////////////////////////////////////////////////////////////////////

#include "Config.h"

#include "Constants.h"

#include <iostream>

#include "Socket.h"

#ifdef PEGASUS_PLATFORM_WIN32_IX86_MSVC

#include <windows.h>

#else

# include <cctype>

# include <cstdlib>

# include <errno.h>

# include <fcntl.h>

# include <netdb.h>

# include <netinet/in.h>

# include <arpa/inet.h>

# include <sys/socket.h>

# ifdef PEGASUS_LOCAL_DOMAIN_SOCKET

# include <unistd.h>

# include <sys/un.h>

# endif

#endif

#include "Network.h"

#include "Socket.h"

#include "TLS.h"

#include "HTTPAcceptor.h"

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#include <Pegasus/Common/MessageLoader.h> //l10n

#ifdef PEGASUS_PLATFORM_OS400_ISERIES_IBM

#include "OS400ConvertChar.h"

#include "EBCDIC_OS400.h"

#endif

PEGASUS_USING_STD;

PEGASUS_NAMESPACE_BEGIN

static int MAX_CONNECTION_QUEUE_LENGTH = -1;

////////////////////////////////////////////////////////////////////////////////

// HTTPAcceptorRep

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{

if (local)

{

#ifdef PEGASUS_LOCAL_DOMAIN_SOCKET

#ifndef PEGASUS_DISABLE_LOCAL_DOMAIN_SOCKET

address = reinterpret_cast<struct sockaddr*>(new struct sockaddr_un);

address_size = sizeof(struct sockaddr_un);

#else

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address_size = sizeof(struct sockaddr_in);

}

~HTTPAcceptorRep()

{

delete address;

}

struct sockaddr* address;

#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM)

SocketLength address_size;

size_t address_size;

#elif defined(PEGASUS_PLATFORM_AIX_RS_IBMCXX) || defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) || (defined(PEGASUS_PLATFORM_SOLARIS_SPARC_CC) && !defined(SUNOS_5_6))

socklen_t address_size;

#else

int address_size;

#endif

Mutex _connection_mut;

Sint32 socket;

SocketHandle socket;

Array<HTTPConnection*> connections;

};

//------------------------------------------------------------------------------

// _setTCPNoDelay()

//------------------------------------------------------------------------------

inline void _setTCPNoDelay(SocketHandle socket)

{

// This function disables "Nagle's Algorithm" also known as "the TCP delay

// algorithm", which causes read operations to obtain whatever data is

// already in the input queue and then wait a little longer to see if

// more data arrives. This algorithm optimizes the case in which data is

// sent in only one direction but severely impairs performance of round

// trip servers. Disabling TCP delay is a standard technique for round

// trip servers.

int opt = 1;

setsockopt(socket, IPPROTO_TCP, TCP_NODELAY, (char*)&opt, sizeof(opt));

}

////////////////////////////////////////////////////////////////////////////////

// HTTPAcceptor

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MessageQueue* outputMessageQueue,

Boolean localConnection,

Uint32 portNumber,

SSLContext * sslcontext)

SSLContext * sslcontext,

Boolean exportConnection,

ReadWriteSem* sslContextObjectLock)

: Base(PEGASUS_QUEUENAME_HTTPACCEPTOR), // ATTN: Need unique names?

_monitor(monitor),

_outputMessageQueue(outputMessageQueue),

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_entry_index(-1),

_localConnection(localConnection),

_portNumber(portNumber),

_sslcontext(sslcontext)

_sslcontext(sslcontext),

_exportConnection(exportConnection),

_sslContextObjectLock(sslContextObjectLock)

{

Socket::initializeInterface();

Platforms interpret the value of MAX_CONNECTION_QUEUE_LENGTH differently. Some platforms interpret

the value literally, while others multiply a fudge factor. When the server is under

stress from multiple clients with multiple requests, toggling this number may prevent clients from

being dropped. Instead of hard coding the value, we allow an environment variable to be set which

specifies a number greater than the maximum concurrent client connections possible. If this environment

var is not specified, then MAX_CONNECTION_QUEUE_LENGTH = 15.

//To engage runtime backlog queue length: uncomment the following block AND comment out the line MAX_CONNECTION_QUEUE_LENGTH = 15

if(MAX_CONNECTION_QUEUE_LENGTH == -1){

#ifdef PEGASUS_PLATFORM_OS400_ISERIES_IBM

#pragma convert(37)

const char* env = getenv("PEGASUS_MAX_BACKLOG_CONNECTION_QUEUE");

EtoA(env);

#pragma convert(0)

#else

const char* env = getenv("PEGASUS_MAX_BACKLOG_CONNECTION_QUEUE");

#endif

if(!env){

MAX_CONNECTION_QUEUE_LENGTH = 15;

}else{

char *end = NULL;

MAX_CONNECTION_QUEUE_LENGTH = strtol(env, &end, 10);

if(*end)

MAX_CONNECTION_QUEUE_LENGTH = 15;

cout << " MAX_CONNECTION_QUEUE_LENGTH = " << MAX_CONNECTION_QUEUE_LENGTH << endl;

}

MAX_CONNECTION_QUEUE_LENGTH = 15;

}

HTTPAcceptor::~HTTPAcceptor()

{

destroyConnections();

unbind();

// ATTN: Is this correct in a multi-HTTPAcceptor server?

Socket::uninitializeInterface();

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if (! message)

return;

PEGASUS_ASSERT(_rep != 0);

switch (message->getType())

{

case SOCKET_MESSAGE:

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// If this is a connection request:

if (socketMessage->socket == _rep->socket &&

socketMessage->events | SocketMessage::READ)

socketMessage->events & SocketMessage::READ)

{

_acceptConnection();

}

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CloseConnectionMessage* closeConnectionMessage

= (CloseConnectionMessage*)message;

_rep->_connection_mut.lock(pegasus_thread_self());

AutoMutex autoMut(_rep->_connection_mut);

for (Uint32 i = 0, n = _rep->connections.size(); i < n; i++)

{

HTTPConnection* connection = _rep->connections[i];

Sint32 socket = connection->getSocket();

SocketHandle socket = connection->getSocket();

if (socket == closeConnectionMessage->socket)

{

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break;

}

_rep->_connection_mut.unlock();

break;

}

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/**

_bind - creates a new server socket and bind socket to the port address.

If PEGASUS_LOCAL_DOMAIN_SOCKET is defined, the port number is ignored and

If PEGASUS_DISABLE_LOCAL_DOMAIN_SOCKET is not defined, the port number is ignored and

a domain socket is bound.

void HTTPAcceptor::_bind()

{

PEGASUS_ASSERT(_rep != 0);

// Create address:

memset(_rep->address, 0, sizeof(*_rep->address));

if (_localConnection)

{

#ifdef PEGASUS_LOCAL_DOMAIN_SOCKET

#ifndef PEGASUS_DISABLE_LOCAL_DOMAIN_SOCKET

reinterpret_cast<struct sockaddr_un*>(_rep->address)->sun_family =

AF_UNIX;

strcpy(reinterpret_cast<struct sockaddr_un*>(_rep->address)->sun_path,

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else

{

_rep->socket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);

_setTCPNoDelay(_rep->socket);

}

if (_rep->socket < 0)

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// set the close-on-exec bit for this file handle.

// any unix that forks needs this bit set.

#ifndef PEGASUS_PLATFORM_WIN32_IX86_MSVC

#if !defined PEGASUS_OS_TYPE_WINDOWS && !defined(PEGASUS_OS_VMS)

int sock_flags;

if( (sock_flags = fcntl(_rep->socket, F_GETFD, 0)) < 0)

{

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throw BindFailedException(parms);

}

// Bind socket to port:

if (::bind(_rep->socket, _rep->address, _rep->address_size) < 0)

{

Socket::close(_rep->socket);

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throw BindFailedException(parms);

}

// Get the actual port value used if the caller specified a port value of 0.

if ( _portNumber == 0 )

{

sockaddr_in buf;

SocketLength bufSize = sizeof(buf);

if ( getsockname(_rep->socket, reinterpret_cast<sockaddr *>(&buf), &bufSize) == 0 )

{

_portNumber = ntohs(buf.sin_port);

}

// Change permissions on Linux local domain socket to allow writes by others.

#if !defined(PEGASUS_DISABLE_LOCAL_DOMAIN_SOCKET) && defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU)

if (_localConnection)

{

if (::chmod( PEGASUS_LOCAL_DOMAIN_SOCKET_PATH,

S_IRUSR | S_IWUSR | S_IXUSR |

S_IRGRP | S_IWGRP | S_IXGRP |

S_IROTH | S_IWOTH | S_IXOTH ) < 0 )

{

Socket::close(_rep->socket);

delete _rep;

_rep = 0;

//l10n

//throw BindFailedException("Failed to bind socket");

MessageLoaderParms parms("Common.HTTPAcceptor.FAILED_BIND_SOCKET",

"Failed to bind socket");

PEG_TRACE_STRING(TRC_DISCARDED_DATA, Tracer::LEVEL2,

"HTTPAcceptor::_bind: Failed to set domain socket permissions.");

throw BindFailedException(parms);

}

#endif

// Set up listening on the given socket:

int const MAX_CONNECTION_QUEUE_LENGTH = 15;

//int const MAX_CONNECTION_QUEUE_LENGTH = 15;

if (listen(_rep->socket, MAX_CONNECTION_QUEUE_LENGTH) < 0)

{

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// close the socket

Socket::close(_rep->socket);

// Unlink Local Domain Socket Bug# 3312

if (_localConnection)

{

#ifndef PEGASUS_DISABLE_LOCAL_DOMAIN_SOCKET

PEG_TRACE_STRING(TRC_HTTP, Tracer::LEVEL2,

"HTTPAcceptor::closeConnectionSocket Unlinking local connection." );

::unlink(

reinterpret_cast<struct sockaddr_un*>(_rep->address)->sun_path);

#else

PEGASUS_ASSERT(false);

#endif

}

else

{

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/**

getOutstandingRequestCount - returns the number of outstanding requests.

Uint32 HTTPAcceptor::getOutstandingRequestCount()

Uint32 HTTPAcceptor::getOutstandingRequestCount() const

{

Uint32 count = 0;

if (_rep)

_rep->_connection_mut.lock(pegasus_thread_self());

{

AutoMutex autoMut(_rep->_connection_mut);

if (_rep->connections.size() > 0)

{

HTTPConnection* connection = _rep->connections[0];

count = connection->getRequestCount();

}

_rep->_connection_mut.unlock();

}

return count;

}

/**

getPortNumber - returns the port number used for the connection

Uint32 HTTPAcceptor::getPortNumber() const

{

return _portNumber;

}

void HTTPAcceptor::setSocketWriteTimeout(Uint32 socketWriteTimeout)

{

_socketWriteTimeout = socketWriteTimeout;

}

void HTTPAcceptor::unbind()

{

if (_rep)

{

_portNumber = 0;

Socket::close(_rep->socket);

if (_localConnection)

{

#ifdef PEGASUS_LOCAL_DOMAIN_SOCKET

#ifndef PEGASUS_DISABLE_LOCAL_DOMAIN_SOCKET

::unlink(

reinterpret_cast<struct sockaddr_un*>(_rep->address)->sun_path);

#else

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void HTTPAcceptor::destroyConnections()

{

if (_rep)

{

// For each connection created by this object:

_rep->_connection_mut.lock(pegasus_thread_self());

AutoMutex autoMut(_rep->_connection_mut);

for (Uint32 i = 0, n = _rep->connections.size(); i < n; i++)

{

HTTPConnection* connection = _rep->connections[i];

Sint32 socket = connection->getSocket();

SocketHandle socket = connection->getSocket();

// Unsolicit SocketMessages:

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// Destroy the connection (causing it to close):

while (connection->refcount.value()) { }

while (connection->refcount.get()) { }

delete connection;

}

_rep->connections.clear();

_rep->_connection_mut.unlock();

}

void HTTPAcceptor::_acceptConnection()

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// Accept the connection (populate the address):

struct sockaddr* accept_address;

#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM)

SocketLength address_size;

size_t address_size;

#elif defined(PEGASUS_PLATFORM_AIX_RS_IBMCXX) || defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) || (defined(PEGASUS_OS_SOLARIS) && !defined(SUNOS_5_6))

socklen_t address_size;

#else

int address_size;

#endif

if (_localConnection)

{

#ifdef PEGASUS_LOCAL_DOMAIN_SOCKET

#ifndef PEGASUS_DISABLE_LOCAL_DOMAIN_SOCKET

accept_address = reinterpret_cast<struct sockaddr*>(new struct sockaddr_un);

address_size = sizeof(struct sockaddr_un);

#else

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address_size = sizeof(struct sockaddr_in);

}

Sint32 socket = accept(_rep->socket, accept_address, &address_size);

SocketHandle socket = accept(_rep->socket, accept_address, &address_size);

delete accept_address;

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}

// set the close on exec flag

#ifndef PEGASUS_PLATFORM_WIN32_IX86_MSVC

#if !defined(PEGASUS_OS_TYPE_WINDOWS) && !defined(PEGASUS_OS_VMS)

int sock_flags;

if( (sock_flags = fcntl(socket, F_GETFD, 0)) < 0)

{

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#endif

Logger::put(Logger::STANDARD_LOG, System::CIMSERVER, Logger::TRACE,

PEG_LOGGER_TRACE((Logger::STANDARD_LOG, System::CIMSERVER, 0,

"HTTPAcceptor - accept() success. Socket: $1"

"HTTPAcceptor - accept() success. Socket: $1" ,socket));

,socket);

AutoPtr<MP_Socket> mp_socket(new MP_Socket(

socket, _sslcontext, _sslContextObjectLock, _exportConnection));

// Create a new conection and add it to the connection list:

mp_socket->setSocketWriteTimeout(_socketWriteTimeout);

MP_Socket * mp_socket = new MP_Socket(socket, _sslcontext);

// Perform the SSL handshake, if applicable. Make the socket non-blocking

if (mp_socket->accept() < 0)

// for this operation so we can send it back to the Monitor's select() loop

// if it takes a while.

mp_socket->disableBlocking();

Sint32 socketAcceptStatus = mp_socket->accept();

mp_socket->enableBlocking();

if (socketAcceptStatus < 0)

{

PEG_TRACE_STRING(TRC_DISCARDED_DATA, Tracer::LEVEL2,

"HTTPAcceptor: SSL_accept() failed");

mp_socket->close();

return;

}

HTTPConnection* connection = new HTTPConnection(

// Create a new connection and add it to the connection list:

_monitor, mp_socket, this, static_cast<MessageQueue *>(_outputMessageQueue));

HTTPConnection* connection = new HTTPConnection(_monitor, mp_socket,

this, static_cast<MessageQueue *>(_outputMessageQueue), _exportConnection);

if (socketAcceptStatus == 0)

{

PEG_TRACE_STRING(TRC_HTTP, Tracer::LEVEL2,

"HTTPAcceptor: SSL_accept() pending");

connection->_acceptPending = true;

}

// Solicit events on this new connection's socket:

int index;

if (-1 == (index = _monitor->solicitSocketMessages(

socket,

connection->getSocket(),

SocketMessage::READ | SocketMessage::EXCEPTION,

connection->getQueueId(), Monitor::CONNECTION)) )

{

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// Save the socket for cleanup later:

connection->_entry_index = index;

_rep->_connection_mut.lock(pegasus_thread_self());

AutoMutex autoMut(_rep->_connection_mut);

_rep->connections.append(connection);

_rep->_connection_mut.unlock();

}

AsyncDQueue<pegasus_acceptor> pegasus_acceptor::acceptors(true, 0);

void pegasus_acceptor::close_all_acceptors(void)

{

try

{

pegasus_acceptor* temp = acceptors.remove_first();

while(temp)

{

delete temp;

temp = acceptors.remove_first();

}

catch(...)

{

}

pegasus_acceptor::pegasus_acceptor(monitor_2* monitor,

MessageQueue* outputMessageQueue,

Boolean localConnection,

Uint32 portNumber,

SSLContext* sslcontext)

: _monitor(monitor), _outputMessageQueue(outputMessageQueue),

_localConnection(localConnection), _portNumber(portNumber),

_sslcontext(sslcontext), connections(true, 0)

{

Socket::initializeInterface();

try {

acceptors.insert_first(this);

}

catch(...){

}

pegasus_acceptor::~pegasus_acceptor(void)

{

unbind();

Socket::uninitializeInterface();

try {

acceptors.remove(this);

}

catch(...){

}

void pegasus_acceptor::bind()

{

PEGASUS_SOCKLEN_SIZE addr_size;

struct sockaddr *addr;

struct sockaddr_in addr_in;

# ifdef PEGASUS_LOCAL_DOMAIN_SOCKET

struct sockaddr_un addr_un;

#endif

memset(&addr_in, 0, sizeof(addr_in));

addr_in.sin_addr.s_addr = INADDR_ANY;

addr_in.sin_family = AF_INET;

addr_in.sin_port = htons(_portNumber);

addr = (struct sockaddr*) &addr_in;

addr_size = sizeof(addr_in);

// first step: determine which kind of socket factory to initialize,

// then create the socket and bind it to an address

if(_localConnection == true){

#ifdef PEGASUS_LOCAL_DOMAIN_SOCKET

unix_socket_factory sf;

pegasus_socket temp(&sf);

_listener = temp;

memset(&addr_un, 0, sizeof(addr_un));

addr_un.sun_family = AF_UNIX;

strcpy(addr_un.sun_path, PEGASUS_LOCAL_DOMAIN_SOCKET_PATH);

#ifdef PEGASUS_PLATFORM_OS400_ISERIES_IBM

AtoE(addr_un.sun_path);

#endif

addr = (struct sockaddr*) &addr_un;

addr_size = sizeof(addr_un);

_listener.socket(AF_UNIX, SOCK_STREAM, 0);

#else

bsd_socket_factory sf;

pegasus_socket temp(&sf);

_listener = temp;

_listener.socket(AF_UNIX, SOCK_STREAM, 0);

#endif

}

else if( _sslcontext != 0 ) {

#ifdef PEGASUS_HAS_SSL

ssl_socket_factory sf;

#else

bsd_socket_factory sf;

#endif

pegasus_socket temp(&sf, _sslcontext);

_listener = temp;

_listener.socket(PF_INET, SOCK_STREAM, 0);

}

else {

bsd_socket_factory sf;

pegasus_socket temp(&sf);

_listener = temp;

_listener.socket(PF_INET, SOCK_STREAM, 0);

}

_listener.bind((struct sockaddr*)addr, addr_size);

// second step: listen on the socket

_listener.listen(5);

// third step: add this listening socket to the monitor

_monitor->tickle();

_monitor->add_entry(_listener, LISTEN, this, this);

}

/** Unbind from the given port.

void pegasus_acceptor::unbind()

{

// remove the socket from the monitor

_monitor->remove_entry((Sint32)_listener);

// close the socket

_listener.close();

}

/** Close the connection socket.

void pegasus_acceptor::closeConnectionSocket()

{

unbind();

}

/** Reopen the connection socket.

void pegasus_acceptor::reopenConnectionSocket()

{

bind();

}

/** Returns the number of outstanding requests

Uint32 pegasus_acceptor::getOutstandingRequestCount()

{

return _monitor->getOutstandingRequestCount();

}

Boolean pegasus_acceptor::operator ==(const pegasus_acceptor& pa)

{

if(this == &pa)

return true;

return false;

}

Boolean pegasus_acceptor::operator ==(void* pa)

{

if((void*)this == pa)

return true;

return false;

}

pegasus_acceptor* pegasus_acceptor::find_acceptor(Boolean local, Uint32 port)

{

pegasus_acceptor* temp = 0;

try {

acceptors.try_lock(pegasus_thread_self());

temp = acceptors.next(temp);

while(temp){

if( local == true ){

if(temp->_localConnection){

acceptors.unlock();

return temp;

}

if(temp->_localConnection == local && temp->_portNumber ==port){

acceptors.unlock();

return temp;

}

temp = acceptors.next(temp);

}

acceptors.unlock();

}

catch(...){

}

return temp;

}

class m2e_rep;

void pegasus_acceptor::accept_dispatch(monitor_2_entry *entry)

{

pegasus_acceptor* myself = (pegasus_acceptor*)entry->get_accept();

HTTPConnection2* connection = new HTTPConnection2(entry->_rep->psock, myself->_outputMessageQueue);

// set the entry's dispatch parameter to point to the connection object

entry->set_dispatch ((void*)connection);

monitor_2::insert_connection(connection);

}

PEGASUS_NAMESPACE_END

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