mirror of https://github.com/aria2/aria2
127 lines
4.0 KiB
C++
127 lines
4.0 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 "BtBitfieldMessage.h"
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#include <cstring>
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#include "bittorrent_helper.h"
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#include "util.h"
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#include "DlAbortEx.h"
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#include "message.h"
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#include "Peer.h"
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#include "PieceStorage.h"
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#include "a2functional.h"
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namespace aria2 {
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const char BtBitfieldMessage::NAME[] = "bitfield";
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BtBitfieldMessage::BtBitfieldMessage()
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: SimpleBtMessage(ID, NAME), bitfieldLength_(0)
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{
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}
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BtBitfieldMessage::BtBitfieldMessage(const unsigned char* bitfield,
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size_t bitfieldLength)
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: SimpleBtMessage(ID, NAME), bitfieldLength_(0)
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{
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setBitfield(bitfield, bitfieldLength);
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}
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BtBitfieldMessage::~BtBitfieldMessage() {}
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void BtBitfieldMessage::setBitfield(const unsigned char* bitfield,
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size_t bitfieldLength)
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{
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if (bitfield_.get() == bitfield) {
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return;
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}
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bitfieldLength_ = bitfieldLength;
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bitfield_ = make_unique<unsigned char[]>(bitfieldLength_);
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memcpy(bitfield_.get(), bitfield, bitfieldLength_);
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}
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std::unique_ptr<BtBitfieldMessage>
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BtBitfieldMessage::create(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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auto message = make_unique<BtBitfieldMessage>();
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message->setBitfield(data + 1, dataLength - 1);
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return message;
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}
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void BtBitfieldMessage::doReceivedAction()
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{
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if (isMetadataGetMode()) {
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return;
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}
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getPieceStorage()->updatePieceStats(bitfield_.get(), bitfieldLength_,
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getPeer()->getBitfield());
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getPeer()->setBitfield(bitfield_.get(), bitfieldLength_);
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if (getPeer()->isSeeder() && getPieceStorage()->downloadFinished()) {
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throw DL_ABORT_EX(MSG_GOOD_BYE_SEEDER);
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}
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}
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std::vector<unsigned char> BtBitfieldMessage::createMessage()
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{
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/**
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* len --- 1+bitfieldLength, 4bytes
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* id --- 5, 1byte
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* bitfield --- bitfield, bitfieldLength bytes
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* total: 5+bitfieldLength bytes
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*/
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const size_t msgLength = 5 + bitfieldLength_;
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auto msg = std::vector<unsigned char>(msgLength);
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bittorrent::createPeerMessageString(msg.data(), msgLength,
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1 + bitfieldLength_, ID);
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memcpy(msg.data() + 5, bitfield_.get(), bitfieldLength_);
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return msg;
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}
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size_t BtBitfieldMessage::getMessageLength() { return 5 + bitfieldLength_; }
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std::string BtBitfieldMessage::toString() const
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{
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std::string s = NAME;
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s += " ";
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s += util::toHex(bitfield_.get(), bitfieldLength_);
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return s;
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}
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} // namespace aria2
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