From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- third_party/libwebrtc/test/rtp_file_reader.cc | 691 ++++++++++++++++++++++++++ 1 file changed, 691 insertions(+) create mode 100644 third_party/libwebrtc/test/rtp_file_reader.cc (limited to 'third_party/libwebrtc/test/rtp_file_reader.cc') diff --git a/third_party/libwebrtc/test/rtp_file_reader.cc b/third_party/libwebrtc/test/rtp_file_reader.cc new file mode 100644 index 0000000000..b6f3cbbe5b --- /dev/null +++ b/third_party/libwebrtc/test/rtp_file_reader.cc @@ -0,0 +1,691 @@ +/* + * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include "test/rtp_file_reader.h" + +#include + +#include +#include +#include + +#include "absl/strings/string_view.h" +#include "modules/rtp_rtcp/source/rtp_util.h" +#include "rtc_base/checks.h" +#include "rtc_base/logging.h" +#include "rtc_base/system/arch.h" + +namespace webrtc { +namespace test { + +static const size_t kFirstLineLength = 80; +static uint16_t kPacketHeaderSize = 8; + +#define TRY(expr) \ + do { \ + if (!(expr)) { \ + RTC_LOG(LS_INFO) << "Failed to read"; \ + return false; \ + } \ + } while (0) + +bool ReadUint32(uint32_t* out, FILE* file) { + *out = 0; + for (size_t i = 0; i < 4; ++i) { + *out <<= 8; + uint8_t tmp; + if (fread(&tmp, 1, sizeof(uint8_t), file) != sizeof(uint8_t)) + return false; + *out |= tmp; + } + return true; +} + +bool ReadUint16(uint16_t* out, FILE* file) { + *out = 0; + for (size_t i = 0; i < 2; ++i) { + *out <<= 8; + uint8_t tmp; + if (fread(&tmp, 1, sizeof(uint8_t), file) != sizeof(uint8_t)) + return false; + *out |= tmp; + } + return true; +} + +class RtpFileReaderImpl : public RtpFileReader { + public: + virtual bool Init(FILE* file, const std::set& ssrc_filter) = 0; +}; + +class InterleavedRtpFileReader : public RtpFileReaderImpl { + public: + ~InterleavedRtpFileReader() override { + if (file_ != nullptr) { + fclose(file_); + file_ = nullptr; + } + } + + bool Init(FILE* file, const std::set& ssrc_filter) override { + file_ = file; + return true; + } + + bool NextPacket(RtpPacket* packet) override { + RTC_DCHECK(file_); + packet->length = RtpPacket::kMaxPacketBufferSize; + uint32_t len = 0; + TRY(ReadUint32(&len, file_)); + if (packet->length < len) { + RTC_FATAL() << "Packet is too large to fit: " << len << " bytes vs " + << packet->length + << " bytes allocated. Consider increasing the buffer " + << "size"; + } + if (fread(packet->data, 1, len, file_) != len) + return false; + + packet->length = len; + packet->original_length = len; + packet->time_ms = time_ms_; + time_ms_ += 5; + return true; + } + + private: + FILE* file_ = nullptr; + int64_t time_ms_ = 0; +}; + +// Read RTP packets from file in rtpdump format, as documented at: +// http://www.cs.columbia.edu/irt/software/rtptools/ +class RtpDumpReader : public RtpFileReaderImpl { + public: + RtpDumpReader() : file_(nullptr) {} + ~RtpDumpReader() override { + if (file_ != nullptr) { + fclose(file_); + file_ = nullptr; + } + } + + RtpDumpReader(const RtpDumpReader&) = delete; + RtpDumpReader& operator=(const RtpDumpReader&) = delete; + + bool Init(FILE* file, const std::set& ssrc_filter) override { + file_ = file; + + char firstline[kFirstLineLength + 1] = {0}; + if (fgets(firstline, kFirstLineLength, file_) == nullptr) { + RTC_LOG(LS_INFO) << "Can't read from file"; + return false; + } + if (strncmp(firstline, "#!rtpplay", 9) == 0) { + if (strncmp(firstline, "#!rtpplay1.0", 12) != 0) { + RTC_LOG(LS_INFO) << "Wrong rtpplay version, must be 1.0"; + return false; + } + } else if (strncmp(firstline, "#!RTPencode", 11) == 0) { + if (strncmp(firstline, "#!RTPencode1.0", 14) != 0) { + RTC_LOG(LS_INFO) << "Wrong RTPencode version, must be 1.0"; + return false; + } + } else { + RTC_LOG(LS_INFO) << "Wrong file format of input file"; + return false; + } + + uint32_t start_sec; + uint32_t start_usec; + uint32_t source; + uint16_t port; + uint16_t padding; + TRY(ReadUint32(&start_sec, file_)); + TRY(ReadUint32(&start_usec, file_)); + TRY(ReadUint32(&source, file_)); + TRY(ReadUint16(&port, file_)); + TRY(ReadUint16(&padding, file_)); + + return true; + } + + bool NextPacket(RtpPacket* packet) override { + uint8_t* rtp_data = packet->data; + packet->length = RtpPacket::kMaxPacketBufferSize; + + uint16_t len; + uint16_t plen; + uint32_t offset; + TRY(ReadUint16(&len, file_)); + TRY(ReadUint16(&plen, file_)); + TRY(ReadUint32(&offset, file_)); + + // Use 'len' here because a 'plen' of 0 specifies rtcp. + len -= kPacketHeaderSize; + if (packet->length < len) { + RTC_LOG(LS_ERROR) << "Packet is too large to fit: " << len << " bytes vs " + << packet->length + << " bytes allocated. Consider increasing the buffer " + "size"; + return false; + } + if (fread(rtp_data, 1, len, file_) != len) { + return false; + } + + packet->length = len; + packet->original_length = plen; + packet->time_ms = offset; + return true; + } + + private: + FILE* file_; +}; + +enum { + kResultFail = -1, + kResultSuccess = 0, + kResultSkip = 1, + + kPcapVersionMajor = 2, + kPcapVersionMinor = 4, + kLinktypeNull = 0, + kLinktypeEthernet = 1, + kBsdNullLoopback1 = 0x00000002, + kBsdNullLoopback2 = 0x02000000, + kEthernetIIHeaderMacSkip = 12, + kEthertypeIp = 0x0800, + kIpVersion4 = 4, + kMinIpHeaderLength = 20, + kFragmentOffsetClear = 0x0000, + kFragmentOffsetDoNotFragment = 0x4000, + kProtocolTcp = 0x06, + kProtocolUdp = 0x11, + kUdpHeaderLength = 8, + kMaxReadBufferSize = 4096 +}; + +const uint32_t kPcapBOMSwapOrder = 0xd4c3b2a1UL; +const uint32_t kPcapBOMNoSwapOrder = 0xa1b2c3d4UL; + +#define TRY_PCAP(expr) \ + do { \ + int r = (expr); \ + if (r == kResultFail) { \ + RTC_LOG(LS_INFO) << "FAIL at " << __FILE__ << ":" << __LINE__; \ + return kResultFail; \ + } else if (r == kResultSkip) { \ + return kResultSkip; \ + } \ + } while (0) + +// Read RTP packets from file in tcpdump/libpcap format, as documented at: +// http://wiki.wireshark.org/Development/LibpcapFileFormat +class PcapReader : public RtpFileReaderImpl { + public: + PcapReader() + : file_(nullptr), + swap_pcap_byte_order_(false), +#ifdef WEBRTC_ARCH_BIG_ENDIAN + swap_network_byte_order_(false), +#else + swap_network_byte_order_(true), +#endif + read_buffer_(), + packets_by_ssrc_(), + packets_(), + next_packet_it_() { + } + + ~PcapReader() override { + if (file_ != nullptr) { + fclose(file_); + file_ = nullptr; + } + } + + PcapReader(const PcapReader&) = delete; + PcapReader& operator=(const PcapReader&) = delete; + + bool Init(FILE* file, const std::set& ssrc_filter) override { + return Initialize(file, ssrc_filter) == kResultSuccess; + } + + int Initialize(FILE* file, const std::set& ssrc_filter) { + file_ = file; + + if (ReadGlobalHeader() < 0) { + return kResultFail; + } + + int total_packet_count = 0; + uint32_t stream_start_ms = 0; + int32_t next_packet_pos = ftell(file_); + for (;;) { + TRY_PCAP(fseek(file_, next_packet_pos, SEEK_SET)); + int result = ReadPacket(&next_packet_pos, stream_start_ms, + ++total_packet_count, ssrc_filter); + if (result == kResultFail) { + break; + } else if (result == kResultSuccess && packets_.size() == 1) { + RTC_DCHECK_EQ(stream_start_ms, 0); + PacketIterator it = packets_.begin(); + stream_start_ms = it->time_offset_ms; + it->time_offset_ms = 0; + } + } + + if (feof(file_) == 0) { + printf("Failed reading file!\n"); + return kResultFail; + } + + printf("Total packets in file: %d\n", total_packet_count); + printf("Total RTP/RTCP packets: %zu\n", packets_.size()); + + for (SsrcMapIterator mit = packets_by_ssrc_.begin(); + mit != packets_by_ssrc_.end(); ++mit) { + uint32_t ssrc = mit->first; + const std::vector& packet_indices = mit->second; + int pt = packets_[packet_indices[0]].payload_type; + printf("SSRC: %08x, %zu packets, pt=%d\n", ssrc, packet_indices.size(), + pt); + } + + // TODO(solenberg): Better validation of identified SSRC streams. + // + // Since we're dealing with raw network data here, we will wrongly identify + // some packets as RTP. When these packets are consumed by RtpPlayer, they + // are unlikely to cause issues as they will ultimately be filtered out by + // the RtpRtcp module. However, we should really do better filtering here, + // which we can accomplish in a number of ways, e.g.: + // + // - Verify that the time stamps and sequence numbers for RTP packets are + // both increasing/decreasing. If they move in different directions, the + // SSRC is likely bogus and can be dropped. (Normally they should be inc- + // reasing but we must allow packet reordering). + // - If RTP sequence number is not changing, drop the stream. + // - Can also use srcip:port->dstip:port pairs, assuming few SSRC collisions + // for up/down streams. + + next_packet_it_ = packets_.begin(); + return kResultSuccess; + } + + bool NextPacket(RtpPacket* packet) override { + uint32_t length = RtpPacket::kMaxPacketBufferSize; + if (NextPcap(packet->data, &length, &packet->time_ms) != kResultSuccess) + return false; + packet->length = static_cast(length); + packet->original_length = packet->length; + return true; + } + + virtual int NextPcap(uint8_t* data, uint32_t* length, uint32_t* time_ms) { + RTC_DCHECK(data); + RTC_DCHECK(length); + RTC_DCHECK(time_ms); + + if (next_packet_it_ == packets_.end()) { + return -1; + } + if (*length < next_packet_it_->payload_length) { + return -1; + } + TRY_PCAP(fseek(file_, next_packet_it_->pos_in_file, SEEK_SET)); + TRY_PCAP(Read(data, next_packet_it_->payload_length)); + *length = next_packet_it_->payload_length; + *time_ms = next_packet_it_->time_offset_ms; + next_packet_it_++; + + return 0; + } + + private: + // A marker of an RTP packet within the file. + struct RtpPacketMarker { + uint32_t packet_number; // One-based index (like in WireShark) + uint32_t time_offset_ms; + uint32_t source_ip; + uint32_t dest_ip; + uint16_t source_port; + uint16_t dest_port; + // Payload type of the RTP packet, + // or RTCP packet type of the first RTCP packet in a compound RTCP packet. + int payload_type; + int32_t pos_in_file; // Byte offset of payload from start of file. + uint32_t payload_length; + }; + + typedef std::vector::iterator PacketIterator; + typedef std::map > SsrcMap; + typedef std::map >::iterator SsrcMapIterator; + + int ReadGlobalHeader() { + uint32_t magic; + TRY_PCAP(Read(&magic, false)); + if (magic == kPcapBOMSwapOrder) { + swap_pcap_byte_order_ = true; + } else if (magic == kPcapBOMNoSwapOrder) { + swap_pcap_byte_order_ = false; + } else { + return kResultFail; + } + + uint16_t version_major; + uint16_t version_minor; + TRY_PCAP(Read(&version_major, false)); + TRY_PCAP(Read(&version_minor, false)); + if (version_major != kPcapVersionMajor || + version_minor != kPcapVersionMinor) { + return kResultFail; + } + + int32_t this_zone; // GMT to local correction. + uint32_t sigfigs; // Accuracy of timestamps. + uint32_t snaplen; // Max length of captured packets, in octets. + uint32_t network; // Data link type. + TRY_PCAP(Read(&this_zone, false)); + TRY_PCAP(Read(&sigfigs, false)); + TRY_PCAP(Read(&snaplen, false)); + TRY_PCAP(Read(&network, false)); + + // Accept only LINKTYPE_NULL and LINKTYPE_ETHERNET. + // See: http://www.tcpdump.org/linktypes.html + if (network != kLinktypeNull && network != kLinktypeEthernet) { + return kResultFail; + } + + return kResultSuccess; + } + + int ReadPacket(int32_t* next_packet_pos, + uint32_t stream_start_ms, + uint32_t number, + const std::set& ssrc_filter) { + RTC_DCHECK(next_packet_pos); + + uint32_t ts_sec; // Timestamp seconds. + uint32_t ts_usec; // Timestamp microseconds. + uint32_t incl_len; // Number of octets of packet saved in file. + uint32_t orig_len; // Actual length of packet. + TRY_PCAP(Read(&ts_sec, false)); + TRY_PCAP(Read(&ts_usec, false)); + TRY_PCAP(Read(&incl_len, false)); + TRY_PCAP(Read(&orig_len, false)); + + *next_packet_pos = ftell(file_) + incl_len; + + RtpPacketMarker marker = {0}; + marker.packet_number = number; + marker.time_offset_ms = CalcTimeDelta(ts_sec, ts_usec, stream_start_ms); + TRY_PCAP(ReadPacketHeader(&marker)); + marker.pos_in_file = ftell(file_); + + if (marker.payload_length > sizeof(read_buffer_)) { + printf("Packet too large!\n"); + return kResultFail; + } + TRY_PCAP(Read(read_buffer_, marker.payload_length)); + + rtc::ArrayView packet(read_buffer_, marker.payload_length); + if (IsRtcpPacket(packet)) { + marker.payload_type = packet[1]; + packets_.push_back(marker); + } else if (IsRtpPacket(packet)) { + uint32_t ssrc = ParseRtpSsrc(packet); + marker.payload_type = ParseRtpPayloadType(packet); + if (ssrc_filter.empty() || ssrc_filter.find(ssrc) != ssrc_filter.end()) { + packets_by_ssrc_[ssrc].push_back( + static_cast(packets_.size())); + packets_.push_back(marker); + } else { + return kResultSkip; + } + } else { + RTC_LOG(LS_INFO) << "Not recognized as RTP/RTCP"; + return kResultSkip; + } + + return kResultSuccess; + } + + int ReadPacketHeader(RtpPacketMarker* marker) { + int32_t file_pos = ftell(file_); + + // Check for BSD null/loopback frame header. The header is just 4 bytes in + // native byte order, so we check for both versions as we don't care about + // the header as such and will likely fail reading the IP header if this is + // something else than null/loopback. + uint32_t protocol; + TRY_PCAP(Read(&protocol, true)); + if (protocol == kBsdNullLoopback1 || protocol == kBsdNullLoopback2) { + int result = ReadXxpIpHeader(marker); + RTC_LOG(LS_INFO) << "Recognized loopback frame"; + if (result != kResultSkip) { + return result; + } + } + + TRY_PCAP(fseek(file_, file_pos, SEEK_SET)); + + // Check for Ethernet II, IP frame header. + uint16_t type; + TRY_PCAP(Skip(kEthernetIIHeaderMacSkip)); // Source+destination MAC. + TRY_PCAP(Read(&type, true)); + if (type == kEthertypeIp) { + int result = ReadXxpIpHeader(marker); + RTC_LOG(LS_INFO) << "Recognized ethernet 2 frame"; + if (result != kResultSkip) { + return result; + } + } + + return kResultSkip; + } + + uint32_t CalcTimeDelta(uint32_t ts_sec, uint32_t ts_usec, uint32_t start_ms) { + // Round to nearest ms. + uint64_t t2_ms = + ((static_cast(ts_sec) * 1000000) + ts_usec + 500) / 1000; + uint64_t t1_ms = static_cast(start_ms); + if (t2_ms < t1_ms) { + return 0; + } else { + return t2_ms - t1_ms; + } + } + + int ReadXxpIpHeader(RtpPacketMarker* marker) { + RTC_DCHECK(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); + RTC_DCHECK_GE(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 packets_; + PacketIterator next_packet_it_; +}; + +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& ssrc_filter) { + std::unique_ptr 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(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, + absl::string_view filename, + const std::set& ssrc_filter) { + RtpFileReaderImpl* reader = CreateReaderForFormat(format); + std::string filename_str = std::string(filename); + FILE* file = fopen(filename_str.c_str(), "rb"); + if (file == nullptr) { + printf("ERROR: Can't open file: %s\n", filename_str.c_str()); + return nullptr; + } + + if (!reader->Init(file, ssrc_filter)) { + delete reader; + return nullptr; + } + return reader; +} + +RtpFileReader* RtpFileReader::Create(FileFormat format, + absl::string_view filename) { + return RtpFileReader::Create(format, filename, std::set()); +} + +} // namespace test +} // namespace webrtc -- cgit v1.2.3