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/*
messageformatter.cpp - msn p2p protocol
Copyright (c) 2005 by Gregg Edghill <[email protected]>
*************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
*************************************************************************
*/
#include "messageformatter.h"
#include "p2p.h"
// TQt includes
#include <tqdatastream.h>
#include <tqregexp.h>
// Kde includes
#include <kdebug.h>
using P2P::MessageFormatter;
using P2P::Message;
MessageFormatter::MessageFormatter(TQObject *tqparent, const char *name) : TQObject(tqparent, name)
{}
MessageFormatter::~MessageFormatter()
{}
Message MessageFormatter::readMessage(const TQByteArray& stream, bool compact)
{
Message inbound;
TQ_UINT32 index = 0;
if(compact == false)
{
// Determine the end position of the message header.
while(index < stream.size())
{
if(stream[index++] == '\n'){
if(stream[index - 3] == '\n')
break;
}
}
// Retrieve the message header.
TQString messageHeader = TQCString(stream.data(), index);
// Retrieve the message mime version, content type,
// and p2p destination.
TQRegExp regex("Content-Type: ([A-Za-z0-9$!*/\\-]*)");
regex.search(messageHeader);
TQString contentType = regex.cap(1);
if(contentType != "application/x-msnmsgrp2p")
return inbound;
// kdDebug(14140) << k_funcinfo << endl;
regex = TQRegExp("MIME-Version: (\\d.\\d)");
regex.search(messageHeader);
inbound.mimeVersion = regex.cap(1);
inbound.contentType = contentType;
regex = TQRegExp("P2P-Dest: ([^\r\n]*)");
regex.search(messageHeader);
TQString destination = regex.cap(1);
}
TQDataStream reader(stream, IO_ReadOnly);
reader.setByteOrder(TQDataStream::LittleEndian);
// Seek to the start position of the message
// transport header.
reader.tqdevice()->tqat(index);
// Read the message transport headers from the stream.
reader >> inbound.header.sessionId;
reader >> inbound.header.identifier;
reader >> inbound.header.dataOffset;
reader >> inbound.header.totalDataSize;
reader >> inbound.header.dataSize;
reader >> inbound.header.flag;
reader >> inbound.header.ackSessionIdentifier;
reader >> inbound.header.ackUniqueIdentifier;
reader >> inbound.header.ackDataSize;
/*kdDebug(14140)
<< "session id, " << inbound.header.sessionId << endl
<< "identifier, " << inbound.header.identifier << endl
<< "data offset, " << inbound.header.dataOffset << endl
<< "total size, " << inbound.header.totalDataSize << endl
<< "data size, " << inbound.header.dataSize << endl
<< "flag, " << inbound.header.flag << endl
<< "ack session identifier, " << inbound.header.ackSessionIdentifier << endl
<< "ack unique identifier, " << inbound.header.ackUniqueIdentifier << endl
<< "ack data size, " << inbound.header.ackDataSize
<< endl;*/
// Read the message body from the stream.
if(inbound.header.dataSize > 0){
inbound.body.resize(inbound.header.dataSize);
reader.readRawBytes(inbound.body.data(), inbound.header.dataSize);
}
if(compact == false)
{
reader.setByteOrder(TQDataStream::BigEndian);
// Read the message application identifier from the stream.
reader >> inbound.applicationIdentifier;
/* kdDebug(14140)
<< "application identifier, " << inbound.applicationIdentifier
<< endl;*/
}
return inbound;
}
void MessageFormatter::writeMessage(const Message& message, TQByteArray& stream, bool compact)
{
// kdDebug(14140) << k_funcinfo << endl;
TQDataStream writer(stream, IO_WriteOnly);
writer.setByteOrder(TQDataStream::LittleEndian);
if(compact == false)
{
const TQCString messageHeader = TQString("MIME-Version: 1.0\r\n"
"Content-Type: application/x-msnmsgrp2p\r\n"
"P2P-Dest: " + message.destination + "\r\n"
"\r\n").utf8();
// Set the capacity of the message buffer.
stream.resize(messageHeader.length() + 48 + message.body.size() + 4);
// Write the message header to the stream
writer.writeRawBytes(messageHeader.data(), messageHeader.length());
}
else
{
// Set the capacity of the message buffer.
stream.resize(4 + 48 + message.body.size());
// Write the message size to the stream.
writer << (TQ_INT32)(48+message.body.size());
}
// Write the transport headers to the stream.
writer << message.header.sessionId;
writer << message.header.identifier;
writer << message.header.dataOffset;
writer << message.header.totalDataSize;
writer << message.header.dataSize;
writer << message.header.flag;
writer << message.header.ackSessionIdentifier;
writer << message.header.ackUniqueIdentifier;
writer << message.header.ackDataSize;
/* kdDebug(14140)
<< "session id, " << message.header.sessionId << endl
<< "identifier, " << message.header.identifier << endl
<< "data offset, " << message.header.dataOffset << endl
<< "total size, " << message.header.totalDataSize << endl
<< "data size, " << message.header.dataSize << endl
<< "flag, " << message.header.flag << endl
<< "ack session identifier, " << message.header.ackSessionIdentifier << endl
<< "ack unique identifier, " << message.header.ackUniqueIdentifier << endl
<< "ack data size, " << message.header.ackDataSize
<< endl;
*/
if(message.body.size() > 0){
// Write the messge body to the stream.
writer.writeRawBytes(message.body.data(), message.body.size());
}
if(compact == false)
{
// Seek to the message application identifier section.
writer.setByteOrder(TQDataStream::BigEndian);
// Write the message application identifier to the stream.
writer << message.applicationIdentifier;
/* kdDebug(14140)
<< "application identifier, " << message.applicationIdentifier
<< endl;
*/
}
}
#include "messageformatter.moc"
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