mirror of https://github.com/aria2/aria2
137 lines
4.2 KiB
C++
137 lines
4.2 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#include "BtHandshakeMessage.h"
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#include <cstring>
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#include "util.h"
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#include "BtConstants.h"
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#include "a2functional.h"
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namespace aria2 {
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const std::string BtHandshakeMessage::NAME("handshake");
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const unsigned char* BtHandshakeMessage::BT_PSTR =
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reinterpret_cast<const unsigned char*>("BitTorrent protocol");
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BtHandshakeMessage::BtHandshakeMessage():SimpleBtMessage(ID, NAME)
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{
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init();
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}
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BtHandshakeMessage::BtHandshakeMessage(const unsigned char* infoHash,
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const unsigned char* peerId):
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SimpleBtMessage(ID, NAME)
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{
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init();
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memcpy(this->infoHash, infoHash, INFO_HASH_LENGTH);
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memcpy(this->peerId, peerId, PEER_ID_LENGTH);
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}
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void BtHandshakeMessage::init() {
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this->pstrlen = 19;
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pstr = new unsigned char[PSTR_LENGTH];
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reserved = new unsigned char[RESERVED_LENGTH];
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infoHash = new unsigned char[INFO_HASH_LENGTH];
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peerId = new unsigned char[PEER_ID_LENGTH];
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memcpy(this->pstr, BT_PSTR, PSTR_LENGTH);
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memset(this->reserved, 0, RESERVED_LENGTH);
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// fast extension
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this->reserved[7] |= 0x04;
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// extended messaging
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this->reserved[5] |= 0x10;
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}
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SharedHandle<BtHandshakeMessage>
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BtHandshakeMessage::create(const unsigned char* data, size_t dataLength)
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{
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SharedHandle<BtHandshakeMessage> message(new BtHandshakeMessage());
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message->pstrlen = data[0];
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memcpy(message->pstr, &data[1], PSTR_LENGTH);
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memcpy(message->reserved, &data[20], RESERVED_LENGTH);
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memcpy(message->infoHash, &data[28], INFO_HASH_LENGTH);
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memcpy(message->peerId, &data[48], PEER_ID_LENGTH);
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return message;
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}
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unsigned char* BtHandshakeMessage::createMessage()
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{
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unsigned char* msg = new unsigned char[MESSAGE_LENGTH];
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msg[0] = pstrlen;
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memcpy(msg+1, pstr, PSTR_LENGTH);
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memcpy(msg+20, reserved, RESERVED_LENGTH);
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memcpy(msg+28, infoHash, INFO_HASH_LENGTH);
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memcpy(msg+48, peerId, PEER_ID_LENGTH);
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return msg;
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}
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size_t BtHandshakeMessage::getMessageLength() {
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return MESSAGE_LENGTH;
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}
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std::string BtHandshakeMessage::toString() const {
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return strconcat(NAME, " peerId=",
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util::percentEncode(peerId, PEER_ID_LENGTH),
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", reserved=",
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util::toHex(reserved, RESERVED_LENGTH));
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}
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bool BtHandshakeMessage::isFastExtensionSupported() const {
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return reserved[7]&0x04;
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}
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bool BtHandshakeMessage::isExtendedMessagingEnabled() const
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{
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return reserved[5]&0x10;
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}
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bool BtHandshakeMessage::isDHTEnabled() const
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{
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return reserved[7]&0x01;
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}
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void BtHandshakeMessage::setInfoHash(const unsigned char* infoHash)
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{
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memcpy(this->infoHash, infoHash, INFO_HASH_LENGTH);
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}
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void BtHandshakeMessage::setPeerId(const unsigned char* peerId)
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{
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memcpy(this->peerId, peerId, PEER_ID_LENGTH);
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}
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} // namespace aria2
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