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/*
* Copyright (c) 2011-2014, Intel Corporation
* 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. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, 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.
*/
#include "RemoteProcessorServer.h"
#include "ListeningSocket.h"
#include <assert.h>
#include <poll.h>
#include <unistd.h>
#include <strings.h>
#include "RequestMessage.h"
#include "AnswerMessage.h"
#include "RemoteCommandHandler.h"
CRemoteProcessorServer::CRemoteProcessorServer(uint16_t uiPort, IRemoteCommandHandler* pCommandHandler) :
_uiPort(uiPort), _pCommandHandler(pCommandHandler), _bIsStarted(false), _pListeningSocket(NULL), _ulThreadId(0)
{
// Create inband pipe
pipe(_aiInbandPipe);
}
CRemoteProcessorServer::~CRemoteProcessorServer()
{
stop();
}
// State
bool CRemoteProcessorServer::start()
{
assert(!_bIsStarted);
// Create server socket
_pListeningSocket = new CListeningSocket;
if (!_pListeningSocket->listen(_uiPort)) {
// Remove listening socket
delete _pListeningSocket;
_pListeningSocket = NULL;
return false;
}
// Create thread
pthread_create(&_ulThreadId, NULL, thread_func, this);
// State
_bIsStarted = true;
return true;
}
void CRemoteProcessorServer::stop()
{
// Check state
if (!_bIsStarted) {
return;
}
// Cause exiting of the thread
uint8_t ucData = 0;
write(_aiInbandPipe[1], &ucData, sizeof(ucData));
// Join thread
pthread_join(_ulThreadId, NULL);
_bIsStarted = false;
// Remove listening socket
delete _pListeningSocket;
_pListeningSocket = NULL;
}
bool CRemoteProcessorServer::isStarted() const
{
return _bIsStarted;
}
// Thread
void* CRemoteProcessorServer::thread_func(void* pData)
{
reinterpret_cast<CRemoteProcessorServer*>(pData)->run();
return NULL;
}
void CRemoteProcessorServer::run()
{
struct pollfd _aPollFds[2];
bzero(_aPollFds, sizeof(_aPollFds));
// Build poll elements
_aPollFds[0].fd = _pListeningSocket->getFd();
_aPollFds[1].fd = _aiInbandPipe[0];
_aPollFds[0].events = POLLIN;
_aPollFds[1].events = POLLIN;
while (true) {
poll(_aPollFds, 2, -1);
if (_aPollFds[0].revents & POLLIN) {
// New incoming connection
handleNewConnection();
}
if (_aPollFds[1].revents & POLLIN) {
// Consume exit request
uint8_t ucData;
read(_aiInbandPipe[0], &ucData, sizeof(ucData));
// Exit
return;
}
}
}
// New connection
void CRemoteProcessorServer::handleNewConnection()
{
CSocket* pClientSocket = _pListeningSocket->accept();
if (!pClientSocket) {
return;
}
// Set timeout
pClientSocket->setTimeout(5000);
// Process all incoming requests from the client
while (true) {
// Process requests
// Create command message
CRequestMessage requestMessage;
///// Receive command
if (!requestMessage.serialize(pClientSocket, false)) {
// Bail out
break;
}
// Actually process the request
bool bSuccess;
string strResult;
if (_pCommandHandler) {
bSuccess = _pCommandHandler->remoteCommandProcess(requestMessage, strResult);
} else {
strResult = "No handler!";
bSuccess = false;
}
// Send back answer
// Create answer message
CAnswerMessage answerMessage(strResult, bSuccess);
///// Send answer
if (!answerMessage.serialize(pClientSocket, true)) {
// Bail out
break;
}
}
// Remove client socket
delete pClientSocket;
}
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