mirror of https://github.com/aria2/aria2
123 lines
4.7 KiB
C++
123 lines
4.7 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 "ChunkChecksumValidator.h"
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#include "Util.h"
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#include "Exception.h"
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#include "TimeA2.h"
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#include "message.h"
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#ifdef ENABLE_MESSAGE_DIGEST
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void ChunkChecksumValidator::validateSameLengthChecksum(BitfieldMan* bitfieldMan,
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int32_t index,
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const string& expectedChecksum,
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int32_t dataLength,
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int32_t checksumLength)
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{
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int64_t offset = ((int64_t)index)*checksumLength;
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string actualChecksum = diskWriter->messageDigest(offset, dataLength, algo);
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if(actualChecksum != expectedChecksum) {
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logger->info(EX_INVALID_CHUNK_CHECKSUM,
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index, offset,
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expectedChecksum.c_str(), actualChecksum.c_str());
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bitfieldMan->unsetBit(index);
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}
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}
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void ChunkChecksumValidator::validateDifferentLengthChecksum(BitfieldMan* bitfieldMan,
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int32_t index,
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const string& expectedChecksum,
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int32_t dataLength,
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int32_t checksumLength)
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{
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int64_t offset = ((int64_t)index)*checksumLength;
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int32_t startIndex;
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int32_t endIndex;
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Util::indexRange(startIndex, endIndex, offset,
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checksumLength, bitfieldMan->getBlockLength());
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if(bitfieldMan->isBitRangeSet(startIndex, endIndex)) {
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string actualChecksum = diskWriter->messageDigest(offset, dataLength, algo);
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if(expectedChecksum != actualChecksum) {
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// wrong checksum
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logger->info(EX_INVALID_CHUNK_CHECKSUM,
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index, offset,
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expectedChecksum.c_str(), actualChecksum.c_str());
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bitfieldMan->unsetBitRange(startIndex, endIndex);
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}
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}
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}
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void ChunkChecksumValidator::validate(BitfieldMan* bitfieldMan,
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const Strings& checksums,
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int32_t checksumLength)
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{
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// We assume file is already opened using DiskWriter::open or openExistingFile.
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if(((int64_t)checksumLength*checksums.size()) < bitfieldMan->getTotalLength()) {
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// insufficient checksums.
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logger->error("Insufficient checksums. checksumLength=%d, numChecksum=%d",
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checksumLength, checksums.size());
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return;
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}
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assert(bitfieldMan->getTotalLength()/checksumLength <= INT32_MAX);
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int32_t x = bitfieldMan->getTotalLength()/checksumLength;
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int32_t r = bitfieldMan->getTotalLength()%checksumLength;
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void (ChunkChecksumValidator::*f)(BitfieldMan*, int32_t, const string&, int32_t, int32_t);
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if(checksumLength == bitfieldMan->getBlockLength()) {
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f = &ChunkChecksumValidator::validateSameLengthChecksum;
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} else {
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f = &ChunkChecksumValidator::validateDifferentLengthChecksum;
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}
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fileAllocationMonitor->setMinValue(0);
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fileAllocationMonitor->setMaxValue(bitfieldMan->getTotalLength());
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fileAllocationMonitor->setCurrentValue(0);
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fileAllocationMonitor->showProgress();
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Time cp;
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for(int32_t i = 0; i < x; ++i) {
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(this->*f)(bitfieldMan, i, checksums[i], checksumLength, checksumLength);
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if(cp.elapsedInMillis(500)) {
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fileAllocationMonitor->setCurrentValue(i*checksumLength);
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fileAllocationMonitor->showProgress();
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cp.reset();
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}
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}
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if(r) {
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(this->*f)(bitfieldMan, x, checksums[x], r, checksumLength);
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}
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fileAllocationMonitor->setCurrentValue(bitfieldMan->getTotalLength());
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fileAllocationMonitor->showProgress();
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}
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#endif // ENABLE_MESSAGE_DIGEST
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