699 lines
24 KiB
C++
699 lines
24 KiB
C++
/***********************************************************************
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*
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* Copyright (C) 2006 Novell, Inc. All Rights Reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; version 2.1
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* of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, Novell, Inc.
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*
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* To contact Novell about this file by physical or electronic mail,
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* you may find current contact information at www.novell.com.
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*
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* Author: Juan Carlos Luciani <jluciani@novell.com>
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*
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***********************************************************************/
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//===[ Include files ]=====================================================
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#include "ipcint.h"
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#include "schannel.h"
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#include "serverreq.h"
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//===[ External data ]=====================================================
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//===[ External prototypes ]===============================================
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extern int
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ServiceRequest(
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ServerReq *pServerReq);
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extern void
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RemoveFromSChannelList(
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SChannel *pSChannel);
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//===[ Manifest constants ]================================================
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//
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// Socket Mapping definitions
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//
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#define INVALID_SOCKET -1
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#define SOCKET_ERROR -1
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#define LINGER struct linger
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#define SOCKADDR_IN struct sockaddr_in
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#define closesocket close
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//===[ Type definitions ]==================================================
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//===[ Function prototypes ]===============================================
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//===[ Global variables ]==================================================
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//
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// Object Counters
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//
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unsigned long numSChannelObjects = 0;
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//===[ Type definitions ]==================================================
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//===[ Function prototypes ]===============================================
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//===[ Global variables ]==================================================
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//++=======================================================================
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SChannel::SChannel(
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int connSocket) :
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m_state (State_Connected),
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m_socket (connSocket)
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//
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// Arguments:
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//
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// Returns:
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//
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// Abstract:
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//
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// Notes:
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//
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// L2
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//=======================================================================--
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{
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DbgTrace(1, "SChannel::SChannel- Start, Obj = %08X\n", this);
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// Initialize the mutex
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if (pthread_mutex_init(&m_mutex, NULL) != 0)
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{
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DbgTrace(0, "SChannel::SChannel- Mutex initialization failed\n", 0);
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// Throw exception
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throw bad_alloc();
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}
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// Increment the object count
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InterlockedIncrement(&numSChannelObjects);
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DbgTrace(1, "SChannel::SChannel- End\n", 0);
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} /*-- SChannel::SChannel() --*/
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//++=======================================================================
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SChannel::~SChannel(void)
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//
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// Arguments:
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//
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// Returns:
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//
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// Abstract:
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//
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// Notes:
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//
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// L2
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//=======================================================================--
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{
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DbgTrace(1, "SChannel::~SChannel- Start, Obj = %08X\n", this);
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// Cleanup resources allocated for the object
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pthread_mutex_destroy(&m_mutex);
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// Free connection socket if necessary
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if (m_socket != INVALID_SOCKET)
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{
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shutdown(m_socket, SHUT_RDWR);
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struct linger linger_opt = {1, 15};
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setsockopt(m_socket, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof(linger_opt));
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closesocket(m_socket);
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}
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// Decrement the object count
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InterlockedDecrement(&numSChannelObjects);
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DbgTrace(1, "SChannel::~SChannel- End\n", 0);
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} /*-- SChannel::~SChannel() --*/
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//++=======================================================================
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int
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SChannel::init(void)
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//
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// Arguments:
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//
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// Returns:
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//
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// Abstract:
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//
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// Notes:
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//
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// L2
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//=======================================================================--
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{
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int retStatus = -1;
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SmartSChannel *pSmartSChannel = NULL;
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DbgTrace(1, "SChannel::init- Start, Obj = %08X\n", this);
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// Verify the state of the object
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if (m_state == State_Connected)
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{
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// Launch a thread to service the channel connection
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try {
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// Create a SmartSChannel object to make sure that the object
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// does not get deleted prematurely.
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pSmartSChannel = new SmartSChannel(this);
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// Create the channel connection thread
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pthread_t thread;
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int threadCreateStatus = pthread_create(&thread,
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NULL,
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(void*(*)(void*))SChannel::connectionThread,
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pSmartSChannel);
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if (threadCreateStatus == 0)
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{
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// We succeeded
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retStatus = 0;
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}
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else
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{
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DbgTrace(0, "SChannel::init- Unable to create channel connection thread, error = %08X\n", threadCreateStatus);
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}
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}
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catch (...) {
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DbgTrace(0, "SChannel::init- Exception caught creating smart pointer\n", 0);
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}
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}
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else
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{
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DbgTrace(0, "SChannel::init- invalid state, state = %d\n", m_state);
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}
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// Deal with initialization failures
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if (retStatus)
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{
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// Adjust the object state
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m_state = State_FailedInitialization;
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// Free SmartSChannel just in case
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delete pSmartSChannel;
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}
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DbgTrace(1, "SChannel::init- End, status = %08X\n", retStatus);
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return retStatus;
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} /*-- SChannel::init() --*/
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//++=======================================================================
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void*
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SChannel::connectionThread(
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SmartPtr<SChannel> *pSmartSChannel)
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//
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// Arguments:
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//
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// Returns:
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//
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// Abstract:
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//
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// Notes:
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//
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// L2
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//=======================================================================--
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{
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SChannel *pSChannel = *pSmartSChannel;
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bool doneReceivingData = false;
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unsigned long bytesReceived;
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unsigned long bytesSent;
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uint32_t reqId;
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int payloadLength;
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unsigned long totalPayloadBytesReceived = 0;
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char reqDataPktHdr[ReqDataPktHdrTemplate.length()];
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char reqErrorPktHdr[ReqErrorPktHdrTemplate.length()];
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char *pRecvBuff;
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ServerReq *pServerReq;
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DbgTrace(1, "SChannel::connectionThread- Start, Obj = %08X\n", pSChannel);
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// Set the thread in the detached state so that it is cleaned up when it exits
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pthread_detach(pthread_self());
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// Check that we are still connected
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if (pSChannel->m_state == State_Connected)
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{
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// Receive and process channel data
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while (!doneReceivingData)
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{
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DbgTrace(2, "SChannel::connectionThread- Receive Loop, Obj = %08X\n", pSChannel);
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// Receive the ReqDataPktHdr. Note, if we add other packet types and if the
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// packet types have different header lengths, then we will need to modify
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// this code to first receive the packet type and then receive the rest
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// of the header based on type.
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while (1)
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{
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bytesReceived = recv(pSChannel->m_socket,
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reqDataPktHdr,
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ReqDataPktHdrTemplate.length(),
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MSG_WAITALL);
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if (bytesReceived != SOCKET_ERROR
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|| errno != EINTR)
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{
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break;
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}
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}
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if (bytesReceived != SOCKET_ERROR)
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{
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// Check if the connection was terminated
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if (bytesReceived == ReqDataPktHdrTemplate.length())
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{
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// Get the reqId and payload length
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if (ChannelProto::getReqIdAndPayloadLength(reqDataPktHdr,
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sizeof(reqDataPktHdr),
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&reqId,
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&payloadLength))
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{
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// Procced based on the packet type
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switch (ChannelProto::getPktType(*reqDataPktHdr))
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{
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case ChannelProto::ReqDataCarrierPacketType:
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DbgTrace(2, "SChannel::connectionThread- Processing Request Data Packet, Obj = %08X\n", pSChannel);
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// Allocate a buffer big enough to receive the payload
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pRecvBuff = new char[payloadLength];
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if (pRecvBuff != NULL)
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{
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// Buffer allocated, receive the Req payload.
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while (1)
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{
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bytesReceived = recv(pSChannel->m_socket,
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pRecvBuff,
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payloadLength,
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MSG_WAITALL);
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if (bytesReceived != SOCKET_ERROR
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|| errno != EINTR)
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{
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break;
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}
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}
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if (bytesReceived != SOCKET_ERROR)
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{
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// Verify that we received all of the payload
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if (bytesReceived == payloadLength)
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{
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// Received all of the payload data
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totalPayloadBytesReceived += bytesReceived;
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// Instantiate ServerReq object
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bool reqProcessingStartedSuccessfully = false;
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try {
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pServerReq = new ServerReq(pSChannel,
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reqId,
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pRecvBuff,
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bytesReceived);
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}
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catch (...) {
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DbgTrace(0, "SChannel::connectionThread- Exception caught creating ServerReq obj\n", 0);
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}
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// Acquire exclusive access to the SChannel object
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pthread_mutex_lock(&pSChannel->m_mutex);
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if (pServerReq)
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{
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// Forget about the receive buffer
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pRecvBuff = NULL;
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// Start processing the Request
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if (ServiceRequest(pServerReq) != 0)
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{
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// Failed to start processing of the Request, delete the ServerReq object.
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DbgTrace(0, "SChannel::connectionThread- StartRequest failed, Obj = %08X\n", pSChannel);
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delete pServerReq;
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}
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else
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{
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reqProcessingStartedSuccessfully = true;
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}
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}
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else
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{
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//DbgTrace(1, "SChannel::connectionThread- Failed to obtain idle ServerReq, Obj = %08X\n", pSChannel);
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DbgTrace(0, "SChannel::connectionThread- Failed to obtain idle ServerReq, Obj = %08X\n", pSChannel);
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}
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// Check if we must send an Request Error packet back to the client
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if (reqProcessingStartedSuccessfully == false)
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{
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// Build ReqErrorHeader
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if (ChannelProto::buildReqErrorPktHdr(reqId,
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0,
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reqErrorPktHdr) == 0)
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{
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// Packet header was built, now sent it to the client.
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bytesSent = send(pSChannel->m_socket,
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reqErrorPktHdr,
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sizeof(reqErrorPktHdr),
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MSG_NOSIGNAL);
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if (bytesSent != sizeof(reqErrorPktHdr))
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{
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DbgTrace(1, "SChannel::connectionThread- Connection aborted prematurely, Obj = %08X\n", pSChannel);
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//printf("SChannel::connectionThread- 1Connection aborted prematurely, Obj = %08X\n", pSChannel);
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doneReceivingData = true;
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}
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}
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else
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{
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DbgTrace(0, "SChannel::connectionThread- Error building Req End Pkt Header, Obj = %08X\n", pSChannel);
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}
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}
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// Release exclusive access to the SChannel object
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pthread_mutex_unlock(&pSChannel->m_mutex);
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}
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else
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{
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DbgTrace(1, "SChannel::connectionThread- Connection aborted prematurely, Obj = %08X\n", pSChannel);
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//printf("bytesReceived = %d, payloadLength = %d\n", bytesReceived, payloadLength);
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//printf("SChannel::connectionThread- 2Connection aborted prematurely, Obj = %08X\n", pSChannel);
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doneReceivingData = true;
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}
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}
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else
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{
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DbgTrace(1, "SChannel::connectionThread- Connection aborted prematurely, Obj = %08X\n", pSChannel);
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//printf("Socket error = %d\n", errno);
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//printf("SChannel::connectionThread- 3Connection aborted prematurely, Obj = %08X\n", pSChannel);
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doneReceivingData = true;
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}
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// Free receive buffer if necessary
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if (pRecvBuff)
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delete[] pRecvBuff;
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}
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else
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{
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DbgTrace(0, "SChannel::connectionThread- Unable to allocate receive buffer, Obj = %08X\n", pSChannel);
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doneReceivingData = true;
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}
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break;
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default:
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DbgTrace(0, "SChannel::connectionThread- Unknown Packet Type, Obj = %08X\n", pSChannel);
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doneReceivingData = true;
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break;
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}
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}
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else
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{
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DbgTrace(1, "SChannel::connectionThread- Unable to obtain payload length, Obj = %08X\n", pSChannel);
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doneReceivingData = true;
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}
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}
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else
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{
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DbgTrace(1, "SChannel::connectionThread- The channel connection was terminated, Obj = %08X\n", pSChannel);
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//printf("bytesReceived = %d, expected = %d\n", bytesReceived, ReqDataPktHdrTemplate.length());
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//printf("SChannel::connectionThread- 4The channel connection was terminated, Obj = %08X\n", pSChannel);
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doneReceivingData = true;
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}
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}
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else
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{
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DbgTrace(1, "SChannel::connectionThread- The channel connection was aborted, Obj = %08X\n", pSChannel);
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//printf("Socket error = %d\n", errno);
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//printf("SChannel::connectionThread- 5The channel connection was aborted, Obj = %08X\n", pSChannel);
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doneReceivingData = true;
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}
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}
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}
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// Acquire exclusive access to the SChannel object
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pthread_mutex_lock(&pSChannel->m_mutex);
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// Try to change the SChannel state to disconnected
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if (pSChannel->m_state == State_Connected)
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pSChannel->m_state = State_Disconnected;
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// Release exclusive access to the SChannel object
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pthread_mutex_unlock(&pSChannel->m_mutex);
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// Remove ourselves from the SChannel list
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RemoveFromSChannelList(pSChannel);
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// Free SmartSChannel
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delete pSmartSChannel;
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DbgTrace(1, "SChannel::connectionThread- End\n", 0);
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// Exit
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pthread_exit(NULL);
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return 0; // never-reached!
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} /*-- SChannel::connectionThread() --*/
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//++=======================================================================
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void
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SChannel::closeChannel(void)
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//
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// Arguments:
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//
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// Returns:
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//
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// Abstract:
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//
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// Notes:
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//
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// L2
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//=======================================================================--
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{
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DbgTrace(1, "SChannel::closeChannel- Start, Obj = %08X\n", this);
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// Acquire SChannel mutex
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pthread_mutex_lock(&m_mutex);
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// Switch the socket state to closed
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m_state = State_Closed;
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// Check if we must close the socket
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if (m_socket != INVALID_SOCKET)
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{
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// Socket needs to be closed, this will
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// release the channel connection thread
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// if it is active.
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shutdown(m_socket, SHUT_RDWR);
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struct linger linger_opt = {1, 15};
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setsockopt(m_socket, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof(linger_opt));
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closesocket(m_socket);
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m_socket = INVALID_SOCKET;
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}
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// Release SChannel mutex
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pthread_mutex_unlock(&m_mutex);
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DbgTrace(1, "SChannel::closeChannel- End\n", 0);
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} /*-- SChannel::closeChannel() --*/
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//++=======================================================================
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int
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SChannel::sendReplyData(
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uint32_t reqId,
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char *pServerData,
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int32_t serverDataLen)
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//
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// Arguments:
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//
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// Returns:
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//
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// Abstract:
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//
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// Notes:
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//
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// L2
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//=======================================================================--
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{
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int retStatus = -1;
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char reqDataPktHdr[ReqDataPktHdrTemplate.length()];
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struct msghdr sendmsgHdr = {0};
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struct iovec ioVectors[2];
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unsigned long bytesSent;
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DbgTrace(1, "SChannel::sendReplyData- Start, Obj = %08X\n", this);
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// Acquire exclusive access to the channel object
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pthread_mutex_lock(&m_mutex);
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// Verify that the channel is connected
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if (m_state == State_Connected)
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{
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// Build ReqDataHeader
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if (ChannelProto::buildReqDataPktHdr(reqId,
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serverDataLen,
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reqDataPktHdr) == 0)
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{
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// Packet header was built, now sent it along with the client data to
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// the server.
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ioVectors[0].iov_base = reqDataPktHdr;
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ioVectors[0].iov_len = sizeof(reqDataPktHdr);
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ioVectors[1].iov_base = pServerData;
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ioVectors[1].iov_len = serverDataLen;
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sendmsgHdr.msg_iov = ioVectors;
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sendmsgHdr.msg_iovlen = 2;
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while (1)
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{
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bytesSent = sendmsg(m_socket,
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&sendmsgHdr,
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MSG_NOSIGNAL);
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if (bytesSent != SOCKET_ERROR
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|| errno != EINTR)
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{
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break;
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}
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}
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if (bytesSent != (sizeof(reqDataPktHdr) + serverDataLen))
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{
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// The send was unsuccessful, assume there was a communication
|
|
// failure. Close the socket to make sure that the connectionThread
|
|
// cleans up.
|
|
m_state = State_Disconnected;
|
|
shutdown(m_socket, SHUT_RDWR);
|
|
struct linger linger_opt = {1, 15};
|
|
setsockopt(m_socket, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof(linger_opt));
|
|
closesocket(m_socket);
|
|
m_socket = INVALID_SOCKET;
|
|
}
|
|
|
|
// Return success even if the send failed to allow things to be cleaned up
|
|
// by the connectionThread routine.
|
|
retStatus = 0;
|
|
}
|
|
else
|
|
{
|
|
DbgTrace(0, "SChannel::sendReplyData- Error building Req Data Pkt Header, Obj = %08X\n", this);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
DbgTrace(1, "SChannel::sendReplyData- Channel not connected, state = %08X\n", m_state);
|
|
}
|
|
|
|
// Release exclusive access to the channel object
|
|
pthread_mutex_unlock(&m_mutex);
|
|
|
|
DbgTrace(1, "SChannel::sendReplyData- End, retStatus = %08X\n", retStatus);
|
|
|
|
return retStatus;
|
|
|
|
} /*-- SChannel::sendData() --*/
|
|
|
|
|
|
//++=======================================================================
|
|
int
|
|
SChannel::sendReplyError(
|
|
uint32_t reqId)
|
|
//
|
|
// Arguments:
|
|
//
|
|
// Returns:
|
|
//
|
|
// Abstract:
|
|
//
|
|
// Notes:
|
|
//
|
|
// L0
|
|
//=======================================================================--
|
|
{
|
|
int retStatus = -1;
|
|
char reqErrorPktHdr[ReqErrorPktHdrTemplate.length()];
|
|
|
|
struct msghdr sendmsgHdr = {0};
|
|
struct iovec ioVectors[2];
|
|
unsigned long bytesSent;
|
|
|
|
DbgTrace(1, "SChannel::sendReplyError- Start, Obj = %08X\n", this);
|
|
|
|
// Acquire exclusive access to the channel object
|
|
pthread_mutex_lock(&m_mutex);
|
|
|
|
// Verify that the channel is connected
|
|
if (m_state == State_Connected)
|
|
{
|
|
// Build ReqErrorHeader
|
|
if (ChannelProto::buildReqErrorPktHdr(reqId,
|
|
0,
|
|
reqErrorPktHdr) == 0)
|
|
{
|
|
// Packet header was built, now sent it to the client.
|
|
while (1)
|
|
{
|
|
bytesSent = send(m_socket,
|
|
reqErrorPktHdr,
|
|
sizeof(reqErrorPktHdr),
|
|
MSG_NOSIGNAL);
|
|
if (bytesSent != SOCKET_ERROR
|
|
|| errno != EINTR)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
if (bytesSent != sizeof(reqErrorPktHdr))
|
|
{
|
|
// The send was unsuccessful, assume there was a communication
|
|
// failure. Close the socket to make sure that the connectionThread
|
|
// cleans up.
|
|
m_state = State_Disconnected;
|
|
shutdown(m_socket, SHUT_RDWR);
|
|
struct linger linger_opt = {1, 15};
|
|
setsockopt(m_socket, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof(linger_opt));
|
|
closesocket(m_socket);
|
|
m_socket = INVALID_SOCKET;
|
|
}
|
|
|
|
// Return success even if the send failed to allow things to be cleaned up
|
|
// by the connectionThread routine.
|
|
retStatus = 0;
|
|
}
|
|
else
|
|
{
|
|
DbgTrace(0, "SChannel::sendReplyError- Error building Req Error Pkt Header, Obj = %08X\n", this);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
DbgTrace(1, "SChannel::sendReplyError- Channel not connected, state = %08X\n", m_state);
|
|
}
|
|
|
|
// Release exclusive access to the channel object
|
|
pthread_mutex_unlock(&m_mutex);
|
|
|
|
DbgTrace(1, "SChannel::sendReplyError- End, retStatus = %08X\n", retStatus);
|
|
|
|
return retStatus;
|
|
|
|
} /*-- SChannel::sendData() --*/
|
|
|
|
|
|
//=========================================================================
|
|
//=========================================================================
|
|
|
|
|