mirror of https://github.com/aria2/aria2
126 lines
4.2 KiB
C++
126 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 "a2functional.h"
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namespace aria2 {
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const unsigned char BtHandshakeMessage::BT_PSTR[] = "BitTorrent protocol";
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const char BtHandshakeMessage::NAME[] = "handshake";
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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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std::copy_n(infoHash, infoHash_.size(), std::begin(infoHash_));
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std::copy_n(peerId, peerId_.size(), std::begin(peerId_));
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}
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BtHandshakeMessage::~BtHandshakeMessage() {}
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void BtHandshakeMessage::init()
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{
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pstrlen_ = 19;
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std::copy_n(BT_PSTR, pstr_.size(), std::begin(pstr_));
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std::fill(std::begin(reserved_), std::end(reserved_), 0);
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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 msg = make_unique<BtHandshakeMessage>();
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msg->pstrlen_ = data[0];
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std::copy_n(&data[1], msg->pstr_.size(), std::begin(msg->pstr_));
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std::copy_n(&data[20], msg->reserved_.size(), std::begin(msg->reserved_));
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std::copy_n(&data[28], msg->infoHash_.size(), std::begin(msg->infoHash_));
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std::copy_n(&data[48], msg->peerId_.size(), std::begin(msg->peerId_));
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return msg;
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}
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std::vector<unsigned char> BtHandshakeMessage::createMessage()
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{
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auto msg = std::vector<unsigned char>(MESSAGE_LENGTH);
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auto dst = msg.data();
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*dst++ = pstrlen_;
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dst = std::copy(std::begin(pstr_), std::end(pstr_), dst);
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dst = std::copy(std::begin(reserved_), std::end(reserved_), dst);
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dst = std::copy(std::begin(infoHash_), std::end(infoHash_), dst);
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std::copy(std::begin(peerId_), std::end(peerId_), dst);
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return msg;
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}
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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_.data(), peerId_.size()).c_str(),
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util::toHex(reserved_.data(), reserved_.size()).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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std::copy_n(infoHash, infoHash_.size(), std::begin(infoHash_));
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}
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void BtHandshakeMessage::setPeerId(const unsigned char* peerId)
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{
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std::copy_n(peerId, peerId_.size(), std::begin(peerId_));
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}
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} // namespace aria2
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