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/* <!-- copyright */
/*
* aria2 - a simple utility for downloading files faster
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* copyright --> */
#include "BitfieldMessage.h"
#include "PeerInteraction.h"
#include "PeerMessageUtil.h"
#include "Util.h"
#include "DlAbortEx.h"
void BitfieldMessage::setBitfield(const unsigned char* bitfield, int bitfieldLength) {
if(this->bitfield != NULL) {
delete [] this->bitfield;
}
this->bitfieldLength = bitfieldLength;
this->bitfield = new unsigned char[this->bitfieldLength];
memcpy(this->bitfield, bitfield, this->bitfieldLength);
}
BitfieldMessage* BitfieldMessage::create(const char* data, int dataLength) {
if(dataLength <= 1) {
throw new DlAbortEx("invalid payload size for %s, size = %d. It should be greater than %d", "bitfield", dataLength, 1);
}
int id = PeerMessageUtil::getId(data);
if(id != ID) {
throw new DlAbortEx("invalid ID=%d for %s. It should be %d.",
id, "bitfield", ID);
}
BitfieldMessage* bitfieldMessage = new BitfieldMessage();
bitfieldMessage->setBitfield((unsigned char*)data+1, dataLength-1);
return bitfieldMessage;
}
void BitfieldMessage::receivedAction() {
peer->setBitfield(bitfield, bitfieldLength);
}
const char* BitfieldMessage::getMessage() {
if(!inProgress && msg == NULL) {
/**
* len --- 1+bitfieldLength, 4bytes
* id --- 5, 1byte
* bitfield --- bitfield, len bytes
* total: 5+len bytes
*/
msgLength = 5+bitfieldLength;
msg = new char[msgLength];
PeerMessageUtil::createPeerMessageString(msg, msgLength,
1+bitfieldLength, ID);
memcpy(msg+5, bitfield, bitfieldLength);
}
return msg;
}
int BitfieldMessage::getMessageLength() {
getMessage();
return msgLength;
}
void BitfieldMessage::check() const {
PeerMessageUtil::checkBitfield(bitfield, bitfieldLength, pieces);
}
string BitfieldMessage::toString() const {
return "bitfield "+Util::toHex(bitfield, bitfieldLength);
}
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