mirror of https://github.com/aria2/aria2
131 lines
4.2 KiB
C++
131 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 char 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) { init(); }
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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(infoHash_, infoHash, INFO_HASH_LENGTH);
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memcpy(peerId_, peerId, PEER_ID_LENGTH);
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}
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void BtHandshakeMessage::init()
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{
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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(pstr_, BT_PSTR, PSTR_LENGTH);
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memset(reserved_, 0, RESERVED_LENGTH);
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// fast extension
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reserved_[7] |= 0x04u;
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// extended messaging
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reserved_[5] |= 0x10u;
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}
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std::unique_ptr<BtHandshakeMessage>
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BtHandshakeMessage::create(const unsigned char* data, size_t dataLength)
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{
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auto message = make_unique<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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auto 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() { return MESSAGE_LENGTH; }
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std::string BtHandshakeMessage::toString() const
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{
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return fmt("%s peerId=%s, reserved=%s", NAME,
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util::percentEncode(peerId_, PEER_ID_LENGTH).c_str(),
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util::toHex(reserved_, RESERVED_LENGTH).c_str());
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}
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bool BtHandshakeMessage::isFastExtensionSupported() const
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{
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return reserved_[7] & 0x04u;
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}
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bool BtHandshakeMessage::isExtendedMessagingEnabled() const
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{
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return reserved_[5] & 0x10u;
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}
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bool BtHandshakeMessage::isDHTEnabled() const { return reserved_[7] & 0x01u; }
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void BtHandshakeMessage::setInfoHash(const unsigned char* infoHash)
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{
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memcpy(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(peerId_, peerId, PEER_ID_LENGTH);
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}
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} // namespace aria2
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