mirror of https://github.com/aria2/aria2
120 lines
3.7 KiB
C++
120 lines
3.7 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 "BtExtendedMessage.h"
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#include <cassert>
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#include <cstring>
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#include "ExtensionMessage.h"
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#include "ExtensionMessageFactory.h"
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#include "bittorrent_helper.h"
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#include "Peer.h"
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#include "DlAbortEx.h"
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#include "message.h"
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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 char BtExtendedMessage::NAME[] = "extended";
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BtExtendedMessage::BtExtendedMessage(
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std::unique_ptr<ExtensionMessage> extensionMessage)
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: SimpleBtMessage(ID, NAME),
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extensionMessage_(std::move(extensionMessage)),
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msgLength_(0)
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{
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}
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std::vector<unsigned char> BtExtendedMessage::createMessage()
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{
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/**
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* len --- 2+extpayload.length, 4bytes
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* id --- 20, 1byte
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* extmsgid --- extmsgid, 1byte
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* extpayload --- extpayload, nbytes
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* total: 6+extpayload.length bytes
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*/
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std::string payload = extensionMessage_->getPayload();
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msgLength_ = 6 + payload.size();
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auto msg = std::vector<unsigned char>(msgLength_);
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auto p = msg.data();
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bittorrent::createPeerMessageString(p, msgLength_, 2 + payload.size(), ID);
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p += 5;
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*p++ = extensionMessage_->getExtensionMessageID();
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std::copy(std::begin(payload), std::end(payload), p);
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return msg;
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}
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bool BtExtendedMessage::sendPredicate() const
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{
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return getPeer()->isExtendedMessagingEnabled();
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}
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std::string BtExtendedMessage::toString() const
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{
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std::string s = NAME;
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s += " ";
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s += extensionMessage_->toString();
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return s;
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}
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std::unique_ptr<BtExtendedMessage>
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BtExtendedMessage::create(ExtensionMessageFactory* factory,
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const std::shared_ptr<Peer>& peer,
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const unsigned char* data, size_t dataLength)
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{
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bittorrent::assertPayloadLengthGreater(1, dataLength, NAME);
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bittorrent::assertID(ID, data, NAME);
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assert(factory);
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return make_unique<BtExtendedMessage>(
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factory->createMessage(data + 1, dataLength - 1));
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}
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void BtExtendedMessage::doReceivedAction()
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{
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if (extensionMessage_) {
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extensionMessage_->doReceivedAction();
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}
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}
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const std::unique_ptr<ExtensionMessage>&
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BtExtendedMessage::getExtensionMessage() const
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{
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return extensionMessage_;
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}
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} // namespace aria2
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