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690 lines
20 KiB
690 lines
20 KiB
/*
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* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "test/rtp_file_reader.h"
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#include <assert.h>
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#include <stdio.h>
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#include <map>
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#include <string>
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#include <vector>
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#include "modules/rtp_rtcp/source/rtp_utility.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/constructor_magic.h"
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#include "rtc_base/format_macros.h"
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#include "rtc_base/logging.h"
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#include "rtc_base/system/arch.h"
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namespace webrtc {
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namespace test {
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static const size_t kFirstLineLength = 80;
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static uint16_t kPacketHeaderSize = 8;
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#define TRY(expr) \
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do { \
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if (!(expr)) { \
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RTC_LOG(LS_INFO) << "Failed to read"; \
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return false; \
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} \
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} while (0)
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bool ReadUint32(uint32_t* out, FILE* file) {
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*out = 0;
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for (size_t i = 0; i < 4; ++i) {
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*out <<= 8;
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uint8_t tmp;
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if (fread(&tmp, 1, sizeof(uint8_t), file) != sizeof(uint8_t))
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return false;
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*out |= tmp;
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}
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return true;
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}
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bool ReadUint16(uint16_t* out, FILE* file) {
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*out = 0;
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for (size_t i = 0; i < 2; ++i) {
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*out <<= 8;
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uint8_t tmp;
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if (fread(&tmp, 1, sizeof(uint8_t), file) != sizeof(uint8_t))
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return false;
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*out |= tmp;
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}
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return true;
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}
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class RtpFileReaderImpl : public RtpFileReader {
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public:
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virtual bool Init(FILE* file, const std::set<uint32_t>& ssrc_filter) = 0;
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};
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class InterleavedRtpFileReader : public RtpFileReaderImpl {
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public:
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~InterleavedRtpFileReader() override {
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if (file_ != nullptr) {
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fclose(file_);
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file_ = nullptr;
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}
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}
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bool Init(FILE* file, const std::set<uint32_t>& ssrc_filter) override {
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file_ = file;
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return true;
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}
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bool NextPacket(RtpPacket* packet) override {
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assert(file_ != nullptr);
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packet->length = RtpPacket::kMaxPacketBufferSize;
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uint32_t len = 0;
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TRY(ReadUint32(&len, file_));
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if (packet->length < len) {
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FATAL() << "Packet is too large to fit: " << len << " bytes vs "
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<< packet->length
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<< " bytes allocated. Consider increasing the buffer "
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"size";
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}
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if (fread(packet->data, 1, len, file_) != len)
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return false;
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packet->length = len;
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packet->original_length = len;
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packet->time_ms = time_ms_;
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time_ms_ += 5;
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return true;
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}
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private:
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FILE* file_ = nullptr;
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int64_t time_ms_ = 0;
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};
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// Read RTP packets from file in rtpdump format, as documented at:
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// http://www.cs.columbia.edu/irt/software/rtptools/
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class RtpDumpReader : public RtpFileReaderImpl {
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public:
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RtpDumpReader() : file_(nullptr) {}
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~RtpDumpReader() override {
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if (file_ != nullptr) {
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fclose(file_);
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file_ = nullptr;
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}
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}
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bool Init(FILE* file, const std::set<uint32_t>& ssrc_filter) override {
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file_ = file;
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char firstline[kFirstLineLength + 1] = {0};
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if (fgets(firstline, kFirstLineLength, file_) == nullptr) {
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RTC_LOG(LS_INFO) << "Can't read from file";
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return false;
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}
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if (strncmp(firstline, "#!rtpplay", 9) == 0) {
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if (strncmp(firstline, "#!rtpplay1.0", 12) != 0) {
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RTC_LOG(LS_INFO) << "Wrong rtpplay version, must be 1.0";
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return false;
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}
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} else if (strncmp(firstline, "#!RTPencode", 11) == 0) {
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if (strncmp(firstline, "#!RTPencode1.0", 14) != 0) {
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RTC_LOG(LS_INFO) << "Wrong RTPencode version, must be 1.0";
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return false;
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}
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} else {
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RTC_LOG(LS_INFO) << "Wrong file format of input file";
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return false;
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}
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uint32_t start_sec;
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uint32_t start_usec;
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uint32_t source;
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uint16_t port;
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uint16_t padding;
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TRY(ReadUint32(&start_sec, file_));
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TRY(ReadUint32(&start_usec, file_));
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TRY(ReadUint32(&source, file_));
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TRY(ReadUint16(&port, file_));
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TRY(ReadUint16(&padding, file_));
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return true;
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}
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bool NextPacket(RtpPacket* packet) override {
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uint8_t* rtp_data = packet->data;
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packet->length = RtpPacket::kMaxPacketBufferSize;
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uint16_t len;
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uint16_t plen;
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uint32_t offset;
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TRY(ReadUint16(&len, file_));
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TRY(ReadUint16(&plen, file_));
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TRY(ReadUint32(&offset, file_));
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// Use 'len' here because a 'plen' of 0 specifies rtcp.
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len -= kPacketHeaderSize;
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if (packet->length < len) {
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RTC_LOG(LS_ERROR) << "Packet is too large to fit: " << len << " bytes vs "
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<< packet->length
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<< " bytes allocated. Consider increasing the buffer "
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"size";
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return false;
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}
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if (fread(rtp_data, 1, len, file_) != len) {
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return false;
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}
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packet->length = len;
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packet->original_length = plen;
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packet->time_ms = offset;
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return true;
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}
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private:
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FILE* file_;
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RTC_DISALLOW_COPY_AND_ASSIGN(RtpDumpReader);
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};
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enum {
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kResultFail = -1,
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kResultSuccess = 0,
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kResultSkip = 1,
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kPcapVersionMajor = 2,
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kPcapVersionMinor = 4,
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kLinktypeNull = 0,
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kLinktypeEthernet = 1,
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kBsdNullLoopback1 = 0x00000002,
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kBsdNullLoopback2 = 0x02000000,
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kEthernetIIHeaderMacSkip = 12,
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kEthertypeIp = 0x0800,
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kIpVersion4 = 4,
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kMinIpHeaderLength = 20,
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kFragmentOffsetClear = 0x0000,
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kFragmentOffsetDoNotFragment = 0x4000,
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kProtocolTcp = 0x06,
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kProtocolUdp = 0x11,
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kUdpHeaderLength = 8,
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kMaxReadBufferSize = 4096
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};
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const uint32_t kPcapBOMSwapOrder = 0xd4c3b2a1UL;
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const uint32_t kPcapBOMNoSwapOrder = 0xa1b2c3d4UL;
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#define TRY_PCAP(expr) \
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do { \
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int r = (expr); \
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if (r == kResultFail) { \
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RTC_LOG(LS_INFO) << "FAIL at " << __FILE__ << ":" << __LINE__; \
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return kResultFail; \
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} else if (r == kResultSkip) { \
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return kResultSkip; \
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} \
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} while (0)
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// Read RTP packets from file in tcpdump/libpcap format, as documented at:
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// http://wiki.wireshark.org/Development/LibpcapFileFormat
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class PcapReader : public RtpFileReaderImpl {
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public:
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PcapReader()
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: file_(nullptr),
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swap_pcap_byte_order_(false),
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#ifdef WEBRTC_ARCH_BIG_ENDIAN
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swap_network_byte_order_(false),
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#else
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swap_network_byte_order_(true),
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#endif
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read_buffer_(),
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packets_by_ssrc_(),
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packets_(),
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next_packet_it_() {
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}
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~PcapReader() override {
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if (file_ != nullptr) {
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fclose(file_);
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file_ = nullptr;
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}
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}
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bool Init(FILE* file, const std::set<uint32_t>& ssrc_filter) override {
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return Initialize(file, ssrc_filter) == kResultSuccess;
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}
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int Initialize(FILE* file, const std::set<uint32_t>& ssrc_filter) {
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file_ = file;
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if (ReadGlobalHeader() < 0) {
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return kResultFail;
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}
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int total_packet_count = 0;
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uint32_t stream_start_ms = 0;
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int32_t next_packet_pos = ftell(file_);
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for (;;) {
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TRY_PCAP(fseek(file_, next_packet_pos, SEEK_SET));
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int result = ReadPacket(&next_packet_pos, stream_start_ms,
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++total_packet_count, ssrc_filter);
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if (result == kResultFail) {
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break;
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} else if (result == kResultSuccess && packets_.size() == 1) {
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assert(stream_start_ms == 0);
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PacketIterator it = packets_.begin();
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stream_start_ms = it->time_offset_ms;
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it->time_offset_ms = 0;
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}
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}
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if (feof(file_) == 0) {
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printf("Failed reading file!\n");
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return kResultFail;
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}
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printf("Total packets in file: %d\n", total_packet_count);
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printf("Total RTP/RTCP packets: %" RTC_PRIuS "\n", packets_.size());
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for (SsrcMapIterator mit = packets_by_ssrc_.begin();
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mit != packets_by_ssrc_.end(); ++mit) {
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uint32_t ssrc = mit->first;
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const std::vector<uint32_t>& packet_indices = mit->second;
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uint8_t pt = packets_[packet_indices[0]].rtp_header.payloadType;
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printf("SSRC: %08x, %" RTC_PRIuS " packets, pt=%d\n", ssrc,
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packet_indices.size(), pt);
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}
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// TODO(solenberg): Better validation of identified SSRC streams.
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//
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// Since we're dealing with raw network data here, we will wrongly identify
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// some packets as RTP. When these packets are consumed by RtpPlayer, they
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// are unlikely to cause issues as they will ultimately be filtered out by
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// the RtpRtcp module. However, we should really do better filtering here,
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// which we can accomplish in a number of ways, e.g.:
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//
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// - Verify that the time stamps and sequence numbers for RTP packets are
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// both increasing/decreasing. If they move in different directions, the
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// SSRC is likely bogus and can be dropped. (Normally they should be inc-
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// reasing but we must allow packet reordering).
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// - If RTP sequence number is not changing, drop the stream.
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// - Can also use srcip:port->dstip:port pairs, assuming few SSRC collisions
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// for up/down streams.
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next_packet_it_ = packets_.begin();
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return kResultSuccess;
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}
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bool NextPacket(RtpPacket* packet) override {
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uint32_t length = RtpPacket::kMaxPacketBufferSize;
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if (NextPcap(packet->data, &length, &packet->time_ms) != kResultSuccess)
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return false;
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packet->length = static_cast<size_t>(length);
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packet->original_length = packet->length;
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return true;
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}
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virtual int NextPcap(uint8_t* data, uint32_t* length, uint32_t* time_ms) {
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assert(data);
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assert(length);
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assert(time_ms);
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if (next_packet_it_ == packets_.end()) {
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return -1;
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}
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if (*length < next_packet_it_->payload_length) {
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return -1;
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}
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TRY_PCAP(fseek(file_, next_packet_it_->pos_in_file, SEEK_SET));
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TRY_PCAP(Read(data, next_packet_it_->payload_length));
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*length = next_packet_it_->payload_length;
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*time_ms = next_packet_it_->time_offset_ms;
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next_packet_it_++;
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return 0;
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}
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private:
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// A marker of an RTP packet within the file.
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struct RtpPacketMarker {
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uint32_t packet_number; // One-based index (like in WireShark)
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uint32_t time_offset_ms;
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uint32_t source_ip;
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uint32_t dest_ip;
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uint16_t source_port;
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uint16_t dest_port;
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RTPHeader rtp_header;
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int32_t pos_in_file; // Byte offset of payload from start of file.
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uint32_t payload_length;
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};
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typedef std::vector<RtpPacketMarker>::iterator PacketIterator;
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typedef std::map<uint32_t, std::vector<uint32_t> > SsrcMap;
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typedef std::map<uint32_t, std::vector<uint32_t> >::iterator SsrcMapIterator;
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int ReadGlobalHeader() {
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uint32_t magic;
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TRY_PCAP(Read(&magic, false));
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if (magic == kPcapBOMSwapOrder) {
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swap_pcap_byte_order_ = true;
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} else if (magic == kPcapBOMNoSwapOrder) {
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swap_pcap_byte_order_ = false;
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} else {
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return kResultFail;
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}
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uint16_t version_major;
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uint16_t version_minor;
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TRY_PCAP(Read(&version_major, false));
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TRY_PCAP(Read(&version_minor, false));
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if (version_major != kPcapVersionMajor ||
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version_minor != kPcapVersionMinor) {
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return kResultFail;
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}
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int32_t this_zone; // GMT to local correction.
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uint32_t sigfigs; // Accuracy of timestamps.
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uint32_t snaplen; // Max length of captured packets, in octets.
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uint32_t network; // Data link type.
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TRY_PCAP(Read(&this_zone, false));
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TRY_PCAP(Read(&sigfigs, false));
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TRY_PCAP(Read(&snaplen, false));
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TRY_PCAP(Read(&network, false));
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// Accept only LINKTYPE_NULL and LINKTYPE_ETHERNET.
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// See: http://www.tcpdump.org/linktypes.html
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if (network != kLinktypeNull && network != kLinktypeEthernet) {
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return kResultFail;
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}
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return kResultSuccess;
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}
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int ReadPacket(int32_t* next_packet_pos,
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uint32_t stream_start_ms,
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uint32_t number,
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const std::set<uint32_t>& ssrc_filter) {
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assert(next_packet_pos);
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uint32_t ts_sec; // Timestamp seconds.
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uint32_t ts_usec; // Timestamp microseconds.
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uint32_t incl_len; // Number of octets of packet saved in file.
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uint32_t orig_len; // Actual length of packet.
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TRY_PCAP(Read(&ts_sec, false));
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TRY_PCAP(Read(&ts_usec, false));
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TRY_PCAP(Read(&incl_len, false));
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TRY_PCAP(Read(&orig_len, false));
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*next_packet_pos = ftell(file_) + incl_len;
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RtpPacketMarker marker = {0};
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marker.packet_number = number;
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marker.time_offset_ms = CalcTimeDelta(ts_sec, ts_usec, stream_start_ms);
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TRY_PCAP(ReadPacketHeader(&marker));
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marker.pos_in_file = ftell(file_);
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if (marker.payload_length > sizeof(read_buffer_)) {
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printf("Packet too large!\n");
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return kResultFail;
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}
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TRY_PCAP(Read(read_buffer_, marker.payload_length));
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RtpUtility::RtpHeaderParser rtp_parser(read_buffer_, marker.payload_length);
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if (rtp_parser.RTCP()) {
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rtp_parser.ParseRtcp(&marker.rtp_header);
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packets_.push_back(marker);
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} else {
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if (!rtp_parser.Parse(&marker.rtp_header, nullptr)) {
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RTC_LOG(LS_INFO) << "Not recognized as RTP/RTCP";
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return kResultSkip;
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}
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uint32_t ssrc = marker.rtp_header.ssrc;
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if (ssrc_filter.empty() || ssrc_filter.find(ssrc) != ssrc_filter.end()) {
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packets_by_ssrc_[ssrc].push_back(
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static_cast<uint32_t>(packets_.size()));
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packets_.push_back(marker);
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} else {
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return kResultSkip;
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}
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}
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return kResultSuccess;
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}
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int ReadPacketHeader(RtpPacketMarker* marker) {
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int32_t file_pos = ftell(file_);
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// Check for BSD null/loopback frame header. The header is just 4 bytes in
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// native byte order, so we check for both versions as we don't care about
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// the header as such and will likely fail reading the IP header if this is
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// something else than null/loopback.
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uint32_t protocol;
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TRY_PCAP(Read(&protocol, true));
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if (protocol == kBsdNullLoopback1 || protocol == kBsdNullLoopback2) {
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int result = ReadXxpIpHeader(marker);
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RTC_LOG(LS_INFO) << "Recognized loopback frame";
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if (result != kResultSkip) {
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return result;
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}
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}
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TRY_PCAP(fseek(file_, file_pos, SEEK_SET));
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// Check for Ethernet II, IP frame header.
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uint16_t type;
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TRY_PCAP(Skip(kEthernetIIHeaderMacSkip)); // Source+destination MAC.
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TRY_PCAP(Read(&type, true));
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if (type == kEthertypeIp) {
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int result = ReadXxpIpHeader(marker);
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RTC_LOG(LS_INFO) << "Recognized ethernet 2 frame";
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if (result != kResultSkip) {
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return result;
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}
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}
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return kResultSkip;
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}
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uint32_t CalcTimeDelta(uint32_t ts_sec, uint32_t ts_usec, uint32_t start_ms) {
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// Round to nearest ms.
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uint64_t t2_ms =
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((static_cast<uint64_t>(ts_sec) * 1000000) + ts_usec + 500) / 1000;
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uint64_t t1_ms = static_cast<uint64_t>(start_ms);
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|
if (t2_ms < t1_ms) {
|
|
return 0;
|
|
} else {
|
|
return t2_ms - t1_ms;
|
|
}
|
|
}
|
|
|
|
int ReadXxpIpHeader(RtpPacketMarker* marker) {
|
|
assert(marker);
|
|
|
|
uint16_t version;
|
|
uint16_t length;
|
|
uint16_t id;
|
|
uint16_t fragment;
|
|
uint16_t protocol;
|
|
uint16_t checksum;
|
|
TRY_PCAP(Read(&version, true));
|
|
TRY_PCAP(Read(&length, true));
|
|
TRY_PCAP(Read(&id, true));
|
|
TRY_PCAP(Read(&fragment, true));
|
|
TRY_PCAP(Read(&protocol, true));
|
|
TRY_PCAP(Read(&checksum, true));
|
|
TRY_PCAP(Read(&marker->source_ip, true));
|
|
TRY_PCAP(Read(&marker->dest_ip, true));
|
|
|
|
if (((version >> 12) & 0x000f) != kIpVersion4) {
|
|
RTC_LOG(LS_INFO) << "IP header is not IPv4";
|
|
return kResultSkip;
|
|
}
|
|
|
|
if (fragment != kFragmentOffsetClear &&
|
|
fragment != kFragmentOffsetDoNotFragment) {
|
|
RTC_LOG(LS_INFO) << "IP fragments cannot be handled";
|
|
return kResultSkip;
|
|
}
|
|
|
|
// Skip remaining fields of IP header.
|
|
uint16_t header_length = (version & 0x0f00) >> (8 - 2);
|
|
assert(header_length >= kMinIpHeaderLength);
|
|
TRY_PCAP(Skip(header_length - kMinIpHeaderLength));
|
|
|
|
protocol = protocol & 0x00ff;
|
|
if (protocol == kProtocolTcp) {
|
|
RTC_LOG(LS_INFO) << "TCP packets are not handled";
|
|
return kResultSkip;
|
|
} else if (protocol == kProtocolUdp) {
|
|
uint16_t length;
|
|
uint16_t checksum;
|
|
TRY_PCAP(Read(&marker->source_port, true));
|
|
TRY_PCAP(Read(&marker->dest_port, true));
|
|
TRY_PCAP(Read(&length, true));
|
|
TRY_PCAP(Read(&checksum, true));
|
|
marker->payload_length = length - kUdpHeaderLength;
|
|
} else {
|
|
RTC_LOG(LS_INFO) << "Unknown transport (expected UDP or TCP)";
|
|
return kResultSkip;
|
|
}
|
|
|
|
return kResultSuccess;
|
|
}
|
|
|
|
int Read(uint32_t* out, bool expect_network_order) {
|
|
uint32_t tmp = 0;
|
|
if (fread(&tmp, 1, sizeof(uint32_t), file_) != sizeof(uint32_t)) {
|
|
return kResultFail;
|
|
}
|
|
if ((!expect_network_order && swap_pcap_byte_order_) ||
|
|
(expect_network_order && swap_network_byte_order_)) {
|
|
tmp = ((tmp >> 24) & 0x000000ff) | (tmp << 24) |
|
|
((tmp >> 8) & 0x0000ff00) | ((tmp << 8) & 0x00ff0000);
|
|
}
|
|
*out = tmp;
|
|
return kResultSuccess;
|
|
}
|
|
|
|
int Read(uint16_t* out, bool expect_network_order) {
|
|
uint16_t tmp = 0;
|
|
if (fread(&tmp, 1, sizeof(uint16_t), file_) != sizeof(uint16_t)) {
|
|
return kResultFail;
|
|
}
|
|
if ((!expect_network_order && swap_pcap_byte_order_) ||
|
|
(expect_network_order && swap_network_byte_order_)) {
|
|
tmp = ((tmp >> 8) & 0x00ff) | (tmp << 8);
|
|
}
|
|
*out = tmp;
|
|
return kResultSuccess;
|
|
}
|
|
|
|
int Read(uint8_t* out, uint32_t count) {
|
|
if (fread(out, 1, count, file_) != count) {
|
|
return kResultFail;
|
|
}
|
|
return kResultSuccess;
|
|
}
|
|
|
|
int Read(int32_t* out, bool expect_network_order) {
|
|
int32_t tmp = 0;
|
|
if (fread(&tmp, 1, sizeof(uint32_t), file_) != sizeof(uint32_t)) {
|
|
return kResultFail;
|
|
}
|
|
if ((!expect_network_order && swap_pcap_byte_order_) ||
|
|
(expect_network_order && swap_network_byte_order_)) {
|
|
tmp = ((tmp >> 24) & 0x000000ff) | (tmp << 24) |
|
|
((tmp >> 8) & 0x0000ff00) | ((tmp << 8) & 0x00ff0000);
|
|
}
|
|
*out = tmp;
|
|
return kResultSuccess;
|
|
}
|
|
|
|
int Skip(uint32_t length) {
|
|
if (fseek(file_, length, SEEK_CUR) != 0) {
|
|
return kResultFail;
|
|
}
|
|
return kResultSuccess;
|
|
}
|
|
|
|
FILE* file_;
|
|
bool swap_pcap_byte_order_;
|
|
const bool swap_network_byte_order_;
|
|
uint8_t read_buffer_[kMaxReadBufferSize];
|
|
|
|
SsrcMap packets_by_ssrc_;
|
|
std::vector<RtpPacketMarker> packets_;
|
|
PacketIterator next_packet_it_;
|
|
|
|
RTC_DISALLOW_COPY_AND_ASSIGN(PcapReader);
|
|
};
|
|
|
|
RtpFileReaderImpl* CreateReaderForFormat(RtpFileReader::FileFormat format) {
|
|
RtpFileReaderImpl* reader = nullptr;
|
|
switch (format) {
|
|
case RtpFileReader::kPcap:
|
|
reader = new PcapReader();
|
|
break;
|
|
case RtpFileReader::kRtpDump:
|
|
reader = new RtpDumpReader();
|
|
break;
|
|
case RtpFileReader::kLengthPacketInterleaved:
|
|
reader = new InterleavedRtpFileReader();
|
|
break;
|
|
}
|
|
return reader;
|
|
}
|
|
|
|
RtpFileReader* RtpFileReader::Create(FileFormat format,
|
|
const uint8_t* data,
|
|
size_t size,
|
|
const std::set<uint32_t>& ssrc_filter) {
|
|
std::unique_ptr<RtpFileReaderImpl> reader(CreateReaderForFormat(format));
|
|
|
|
FILE* file = tmpfile();
|
|
if (file == nullptr) {
|
|
printf("ERROR: Can't open file from memory buffer\n");
|
|
return nullptr;
|
|
}
|
|
|
|
if (fwrite(reinterpret_cast<const void*>(data), sizeof(uint8_t), size,
|
|
file) != size) {
|
|
return nullptr;
|
|
}
|
|
rewind(file);
|
|
|
|
if (!reader->Init(file, ssrc_filter)) {
|
|
return nullptr;
|
|
}
|
|
return reader.release();
|
|
}
|
|
|
|
RtpFileReader* RtpFileReader::Create(FileFormat format,
|
|
const std::string& filename,
|
|
const std::set<uint32_t>& ssrc_filter) {
|
|
RtpFileReaderImpl* reader = CreateReaderForFormat(format);
|
|
FILE* file = fopen(filename.c_str(), "rb");
|
|
if (file == nullptr) {
|
|
printf("ERROR: Can't open file: %s\n", filename.c_str());
|
|
return nullptr;
|
|
}
|
|
|
|
if (!reader->Init(file, ssrc_filter)) {
|
|
delete reader;
|
|
return nullptr;
|
|
}
|
|
return reader;
|
|
}
|
|
|
|
RtpFileReader* RtpFileReader::Create(FileFormat format,
|
|
const std::string& filename) {
|
|
return RtpFileReader::Create(format, filename, std::set<uint32_t>());
|
|
}
|
|
|
|
} // namespace test
|
|
} // namespace webrtc
|