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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "BtHandshakeMessage.h"
#include "PeerMessageUtil.h"
#include "Util.h"
const unsigned char* BtHandshakeMessage::BT_PSTR = (const unsigned char*)"BitTorrent protocol";
BtHandshakeMessage::BtHandshakeMessage() {
init();
}
BtHandshakeMessage::BtHandshakeMessage(const unsigned char* infoHash,
const unsigned char* peerId)
{
init();
memcpy(this->infoHash, infoHash, INFO_HASH_LENGTH);
memcpy(this->peerId, peerId, PEER_ID_LENGTH);
}
void BtHandshakeMessage::init() {
msg = 0;
this->pstrlen = 19;
pstr = new unsigned char[PSTR_LENGTH];
reserved = new unsigned char[RESERVED_LENGTH];
infoHash = new unsigned char[INFO_HASH_LENGTH];
peerId = new unsigned char[PEER_ID_LENGTH];
memcpy(this->pstr, BT_PSTR, PSTR_LENGTH);
memset(this->reserved, 0, RESERVED_LENGTH);
// fast extension
this->reserved[7] |= 0x04;
// extended messaging
this->reserved[5] |= 0x10;
}
BtHandshakeMessageHandle BtHandshakeMessage::create(const unsigned char* data, int32_t dataLength) {
BtHandshakeMessageHandle message = new BtHandshakeMessage();
message->pstrlen = data[0];
memcpy(message->pstr, &data[1], PSTR_LENGTH);
memcpy(message->reserved, &data[20], RESERVED_LENGTH);
memcpy(message->infoHash, &data[28], INFO_HASH_LENGTH);
memcpy(message->peerId, &data[48], PEER_ID_LENGTH);
return message;
}
const unsigned char* BtHandshakeMessage::getMessage() {
if(!msg) {
msg = new unsigned char[MESSAGE_LENGTH];
msg[0] = pstrlen;
memcpy(msg+1, pstr, PSTR_LENGTH);
memcpy(msg+20, reserved, RESERVED_LENGTH);
memcpy(msg+28, infoHash, INFO_HASH_LENGTH);
memcpy(msg+48, peerId, PEER_ID_LENGTH);
}
return msg;
}
int32_t BtHandshakeMessage::getMessageLength() {
return MESSAGE_LENGTH;
}
string BtHandshakeMessage::toString() const {
return "handshake peerId="+
Util::urlencode(peerId, PEER_ID_LENGTH)+
", reserved="+Util::toHex(reserved, RESERVED_LENGTH);
}
bool BtHandshakeMessage::isFastExtensionSupported() const {
return reserved[7]&0x04;
}
bool BtHandshakeMessage::isExtendedMessagingEnabled() const
{
return reserved[5]&0x10;
}
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