429 lines
12 KiB
C++
429 lines
12 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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//===[ External data ]=====================================================
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//===[ External prototypes ]===============================================
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//===[ Manifest constants ]================================================
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//===[ Type definitions ]==================================================
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//===[ Function prototypes ]===============================================
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//===[ Global variables ]==================================================
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// Channel Packet Types
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string DataCarrierTypeTemplate = "TypeXX";
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string ReqDataCarrierType = "Type01";
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string ReqErrorCarrierType = "Type02";
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// Channel Packet Headers
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string ReqIdHdr = "ReqIdHdr =";
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string PayloadLengthHdr = "PayloadLength =";
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// Req Data Pkt Hdr Template
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string ReqDataPktHdrTemplate = "Type01\r\nReqIdHdr =XXXXXXXX\r\nPayloadLength =XXXXXXXX\r\n\r\n";
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// Req Error Pkt Hdr Template
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string ReqErrorPktHdrTemplate = "Type02\r\nReqIdHdr =XXXXXXXX\r\nPayloadLength =XXXXXXXX\r\n\r\n";
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//++=======================================================================
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int
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ChannelProto::buildReqDataPktHdr(
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uint32_t reqId,
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int32_t payloadLength,
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char *pPktHdr)
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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: pPktHdr must point to a buffer of size ReqDataPktHdrTemple.length().
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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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DbgTrace(1, "ChannelProto::buildReqDataPktHdr- Start\n", 0);
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try {
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// - Req Data Packet Header Format -
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//
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// ReqDataCarrierType
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// ReqIdHdr value (value format=%08X)
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// PayloadLengthHdr value (value format=%08X)
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//
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// Setup the necessary value strings
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char wrkBuffer[10];
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sprintf(wrkBuffer, "%08X", reqId);
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string reqIdValue = wrkBuffer;
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sprintf(wrkBuffer, "%08X", payloadLength);
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string payloadLengthValue = wrkBuffer;
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// Format the header.
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char* pCurr = pPktHdr;
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memcpy(pCurr, ReqDataCarrierType.c_str(), ReqDataCarrierType.length());
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pCurr += ReqDataCarrierType.length();
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memcpy(pCurr, "\r\n", 2);
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pCurr += 2;
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memcpy(pCurr, ReqIdHdr.c_str(), ReqIdHdr.length());
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pCurr += ReqIdHdr.length();
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memcpy(pCurr, reqIdValue.c_str(), reqIdValue.length());
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pCurr += reqIdValue.length();
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memcpy(pCurr, "\r\n", 2);
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pCurr += 2;
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memcpy(pCurr, PayloadLengthHdr.c_str(), PayloadLengthHdr.length());
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pCurr += PayloadLengthHdr.length();
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memcpy(pCurr, payloadLengthValue.c_str(), payloadLengthValue.length());
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pCurr += payloadLengthValue.length();
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memcpy(pCurr, "\r\n\r\n", 4);
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// Success
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retStatus = 0;
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}
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catch (...) {
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DbgTrace(0, "ChannelProto::buildReqDataPktHdr- Exception caught while creating header\n", 0);
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}
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DbgTrace(1, "ChannelProto::buildReqDataPktHdr- End, retStatus = %0X\n", retStatus);
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return retStatus;
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} /*-- ChannelProto::buildReqDataPktHdr() --*/
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//++=======================================================================
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int
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ChannelProto::buildReqErrorPktHdr(
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uint32_t reqId,
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int32_t payloadLength,
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char *pPktHdr)
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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: pPktHdr must point to a buffer of size ReqErrorPktHdrTemple.length().
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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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DbgTrace(1, "ChannelProto::buildReqErrorPktHdr- Start\n", 0);
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try {
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// - Req Error Packet Header Format -
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//
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// ReqErrorCarrierType
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// ReqIdHdr value (value format=%08X)
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// PayloadLengthHdr value (value format=%08X)
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//
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// Setup the necessary value strings
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char wrkBuffer[10];
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sprintf(wrkBuffer, "%08X", reqId);
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string reqIdValue = wrkBuffer;
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sprintf(wrkBuffer, "%08X", payloadLength);
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string payloadLengthValue = wrkBuffer;
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// Format the header.
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char* pCurr = pPktHdr;
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memcpy(pCurr, ReqErrorCarrierType.c_str(), ReqErrorCarrierType.length());
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pCurr += ReqErrorCarrierType.length();
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memcpy(pCurr, "\r\n", 2);
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pCurr += 2;
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memcpy(pCurr, ReqIdHdr.c_str(), ReqIdHdr.length());
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pCurr += ReqIdHdr.length();
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memcpy(pCurr, reqIdValue.c_str(), reqIdValue.length());
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pCurr += reqIdValue.length();
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memcpy(pCurr, "\r\n", 2);
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pCurr += 2;
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memcpy(pCurr, PayloadLengthHdr.c_str(), PayloadLengthHdr.length());
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pCurr += PayloadLengthHdr.length();
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memcpy(pCurr, payloadLengthValue.c_str(), payloadLengthValue.length());
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pCurr += payloadLengthValue.length();
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memcpy(pCurr, "\r\n\r\n", 4);
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// Success
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retStatus = 0;
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}
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catch (...) {
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DbgTrace(0, "ChannelProto::buildReqErrorPktHdr- Exception caught while creating header\n", 0);
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}
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DbgTrace(1, "ChannelProto::buildReqErrorPktHdr- End, retStatus = %0X\n", retStatus);
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return retStatus;
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} /*-- ChannelProto::buildReqErrorPktHdr() --*/
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//++=======================================================================
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ChannelProto::PacketTypes
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ChannelProto::getPktType(
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char &buff,
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int hdrLength)
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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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PacketTypes packetType = UnknownPacketType;
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DbgTrace(1, "ChannelProto::getPktType- Start\n", 0);
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// Find the end of the Channel Packet Type
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char *pCurr = &buff;
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int bytesLeft = hdrLength;
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bool endFound = false;
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while (bytesLeft)
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{
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if (*pCurr == '\r')
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{
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endFound = true;
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break;
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}
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pCurr ++;
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bytesLeft --;
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}
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if (endFound)
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{
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// Found the end of the Channel Packet Type, now
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// calculate its length.
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int channelPktTypeLength = pCurr - &buff;
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// Now start comparing
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if (channelPktTypeLength == ReqDataCarrierType.length()
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&& !memcmp(&buff, ReqDataCarrierType.c_str(), channelPktTypeLength))
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{
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// The type is Channel Req Data Carrier
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packetType = ReqDataCarrierPacketType;
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}
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else if (channelPktTypeLength == ReqErrorCarrierType.length()
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&& !memcmp(&buff, ReqErrorCarrierType.c_str(), channelPktTypeLength))
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{
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// The type is Channel Req Error Carrier
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packetType = ReqErrorCarrierPacketType;
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}
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else
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{
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DbgTrace(0, "ChannelProto::getPktType- No match found\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, "ChannelProto::getPktType- Invalid header\n", 0);
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}
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DbgTrace(1, "ChannelProto::getPktType- End, type = %d\n", packetType);
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return packetType;
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} /*-- ChannelProto::getPktType() --*/
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//++=======================================================================
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bool
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ChannelProto::getReqIdAndPayloadLength(
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char *pBuff,
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int hdrLength,
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uint32_t *pReqId,
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int32_t *pPayloadLength)
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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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bool reqIdObtained = false;
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bool payloadLengthObtained = false;
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DbgTrace(1, "ChannelProto::getReqIdAndPayloadLength- Start\n", 0);
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char *pCurr = pBuff;
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char *pChannelHdr = NULL;
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int bytesLeft = hdrLength;
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// Skip the Channel Packet Type which should always
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// be the first header.
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while (bytesLeft >= 2)
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{
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if (*pCurr == '\r'
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&& *(pCurr+1) == '\n')
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{
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// Found the end of the channel packet type
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pCurr += 2;
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bytesLeft -= 2;
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break;
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}
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else
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{
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pCurr ++;
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bytesLeft --;
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}
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}
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// Start processing Channel Packet Headers
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pChannelHdr = pCurr;
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while (bytesLeft >= 2
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&& (!reqIdObtained || !payloadLengthObtained))
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{
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if (*pCurr == '\r'
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&& *(pCurr+1) == '\n')
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{
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// Found the end of the current channel header
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pCurr += 2;
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bytesLeft -= 2;
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// Check if the line is empty or if it contained a
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// channel header.
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if ((pCurr - pChannelHdr) == 2)
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{
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// This was an empty line, which means that
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// we reached the end of the channel packet header.
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break;
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}
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else
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{
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// Check if the header is the Req Id Hdr
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if (!reqIdObtained && (pCurr - pChannelHdr) > ReqIdHdr.length()
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&& !memcmp(pChannelHdr, ReqIdHdr.c_str(), ReqIdHdr.length()))
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{
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// We found the Req Id Hdr, get the value.
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char *pValue = pChannelHdr + ReqIdHdr.length();
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// Temporarily NULL terminate the value
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*(pCurr-2) = '\0';
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// Convert the value to hex
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errno = 0;
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unsigned long int value = strtoul(pValue, NULL, 16);
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if (errno != 0
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|| value > UINT32_MAX)
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{
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DbgTrace(0, "ChannelProto::getReqIdAndPayloadLength- Invalid reqId value, %s\n", pValue);
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break;
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}
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// Use the value
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*pReqId = (uint32_t) value;
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// Undo the damage that we did
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*(pCurr-2) = '\r';
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// Remember that the Req Id was obtained
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reqIdObtained = true;
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}
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// Check if the header is the Payload Length Hdr
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else if ((pCurr - pChannelHdr) > PayloadLengthHdr.length()
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&& !memcmp(pChannelHdr, PayloadLengthHdr.c_str(), PayloadLengthHdr.length()))
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{
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// We found the Payload Length Hdr, get the value.
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char *pValue = pChannelHdr + PayloadLengthHdr.length();
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// Temporarily NULL terminate the value
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*(pCurr-2) = '\0';
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// Convert the value to hex
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errno = 0;
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long int value = strtol(pValue, NULL, 16);
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if (errno != 0
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|| value > INT32_MAX)
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{
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DbgTrace(0, "ChannelProto::getReqIdAndPayloadLength- Invalid payloadLength value, %s\n", pValue);
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break;
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}
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// Use the value
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*pPayloadLength = (int32_t) value;
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// Undo the damage that we did
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*(pCurr-2) = '\r';
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// Remember that the Payload Lenght was obtained
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payloadLengthObtained = true;
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}
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// Get set to process the next header
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pChannelHdr = pCurr;
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}
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}
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else
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{
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pCurr ++;
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bytesLeft --;
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}
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}
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DbgTrace(1,
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"ChannelProto::getReqIdAndPayloadLength- End, retStatus = %0X\n",
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reqIdObtained && payloadLengthObtained);
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return reqIdObtained && payloadLengthObtained;
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} /*-- ChannelProto::getReqIdAndPayloadLength() --*/
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//=========================================================================
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//=========================================================================
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