diff options
Diffstat (limited to 'third_party/libwebrtc/net/dcsctp/packet')
146 files changed, 10261 insertions, 0 deletions
diff --git a/third_party/libwebrtc/net/dcsctp/packet/BUILD.gn b/third_party/libwebrtc/net/dcsctp/packet/BUILD.gn new file mode 100644 index 0000000000..08bdb0f5a5 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/BUILD.gn @@ -0,0 +1,331 @@ +# Copyright (c) 2021 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. + +import("../../../webrtc.gni") + +group("packet") { + deps = [ ":bounded_io" ] +} + +rtc_source_set("bounded_io") { + deps = [ + "../../../api:array_view", + "../../../rtc_base:checks", + ] + sources = [ + "bounded_byte_reader.h", + "bounded_byte_writer.h", + ] +} + +rtc_library("tlv_trait") { + deps = [ + ":bounded_io", + "../../../api:array_view", + "../../../rtc_base:checks", + "../../../rtc_base:logging", + ] + absl_deps = [ + "//third_party/abseil-cpp/absl/strings:strings", + "//third_party/abseil-cpp/absl/types:optional", + ] + sources = [ + "tlv_trait.cc", + "tlv_trait.h", + ] +} + +rtc_source_set("data") { + deps = [ + "../../../rtc_base:checks", + "../common:internal_types", + "../public:types", + ] + sources = [ "data.h" ] +} + +rtc_library("crc32c") { + deps = [ + "../../../api:array_view", + "../../../rtc_base:checks", + "//third_party/crc32c", + ] + sources = [ + "crc32c.cc", + "crc32c.h", + ] +} + +rtc_library("parameter") { + deps = [ + ":bounded_io", + ":data", + ":tlv_trait", + "../../../api:array_view", + "../../../rtc_base:checks", + "../../../rtc_base:logging", + "../../../rtc_base:stringutils", + "../common:internal_types", + "../common:math", + "../common:str_join", + "../public:types", + ] + sources = [ + "parameter/add_incoming_streams_request_parameter.cc", + "parameter/add_incoming_streams_request_parameter.h", + "parameter/add_outgoing_streams_request_parameter.cc", + "parameter/add_outgoing_streams_request_parameter.h", + "parameter/forward_tsn_supported_parameter.cc", + "parameter/forward_tsn_supported_parameter.h", + "parameter/heartbeat_info_parameter.cc", + "parameter/heartbeat_info_parameter.h", + "parameter/incoming_ssn_reset_request_parameter.cc", + "parameter/incoming_ssn_reset_request_parameter.h", + "parameter/outgoing_ssn_reset_request_parameter.cc", + "parameter/outgoing_ssn_reset_request_parameter.h", + "parameter/parameter.cc", + "parameter/parameter.h", + "parameter/reconfiguration_response_parameter.cc", + "parameter/reconfiguration_response_parameter.h", + "parameter/ssn_tsn_reset_request_parameter.cc", + "parameter/ssn_tsn_reset_request_parameter.h", + "parameter/state_cookie_parameter.cc", + "parameter/state_cookie_parameter.h", + "parameter/supported_extensions_parameter.cc", + "parameter/supported_extensions_parameter.h", + ] + absl_deps = [ + "//third_party/abseil-cpp/absl/algorithm:container", + "//third_party/abseil-cpp/absl/memory", + "//third_party/abseil-cpp/absl/strings", + "//third_party/abseil-cpp/absl/types:optional", + ] +} + +rtc_library("error_cause") { + deps = [ + ":data", + ":parameter", + ":tlv_trait", + "../../../api:array_view", + "../../../rtc_base:checks", + "../../../rtc_base:logging", + "../../../rtc_base:stringutils", + "../common:internal_types", + "../common:math", + "../common:str_join", + "../packet:bounded_io", + "../public:types", + ] + sources = [ + "error_cause/cookie_received_while_shutting_down_cause.cc", + "error_cause/cookie_received_while_shutting_down_cause.h", + "error_cause/error_cause.cc", + "error_cause/error_cause.h", + "error_cause/invalid_mandatory_parameter_cause.cc", + "error_cause/invalid_mandatory_parameter_cause.h", + "error_cause/invalid_stream_identifier_cause.cc", + "error_cause/invalid_stream_identifier_cause.h", + "error_cause/missing_mandatory_parameter_cause.cc", + "error_cause/missing_mandatory_parameter_cause.h", + "error_cause/no_user_data_cause.cc", + "error_cause/no_user_data_cause.h", + "error_cause/out_of_resource_error_cause.cc", + "error_cause/out_of_resource_error_cause.h", + "error_cause/protocol_violation_cause.cc", + "error_cause/protocol_violation_cause.h", + "error_cause/restart_of_an_association_with_new_address_cause.cc", + "error_cause/restart_of_an_association_with_new_address_cause.h", + "error_cause/stale_cookie_error_cause.cc", + "error_cause/stale_cookie_error_cause.h", + "error_cause/unrecognized_chunk_type_cause.cc", + "error_cause/unrecognized_chunk_type_cause.h", + "error_cause/unrecognized_parameter_cause.cc", + "error_cause/unrecognized_parameter_cause.h", + "error_cause/unresolvable_address_cause.cc", + "error_cause/unresolvable_address_cause.h", + "error_cause/user_initiated_abort_cause.cc", + "error_cause/user_initiated_abort_cause.h", + ] + absl_deps = [ + "//third_party/abseil-cpp/absl/algorithm:container", + "//third_party/abseil-cpp/absl/strings", + "//third_party/abseil-cpp/absl/types:optional", + ] +} + +rtc_library("chunk") { + deps = [ + ":data", + ":error_cause", + ":parameter", + ":tlv_trait", + "../../../api:array_view", + "../../../rtc_base:checks", + "../../../rtc_base:logging", + "../../../rtc_base:stringutils", + "../common:math", + "../common:str_join", + "../packet:bounded_io", + ] + sources = [ + "chunk/abort_chunk.cc", + "chunk/abort_chunk.h", + "chunk/chunk.cc", + "chunk/chunk.h", + "chunk/cookie_ack_chunk.cc", + "chunk/cookie_ack_chunk.h", + "chunk/cookie_echo_chunk.cc", + "chunk/cookie_echo_chunk.h", + "chunk/data_chunk.cc", + "chunk/data_chunk.h", + "chunk/data_common.h", + "chunk/error_chunk.cc", + "chunk/error_chunk.h", + "chunk/forward_tsn_chunk.cc", + "chunk/forward_tsn_chunk.h", + "chunk/forward_tsn_common.h", + "chunk/heartbeat_ack_chunk.cc", + "chunk/heartbeat_ack_chunk.h", + "chunk/heartbeat_request_chunk.cc", + "chunk/heartbeat_request_chunk.h", + "chunk/idata_chunk.cc", + "chunk/idata_chunk.h", + "chunk/iforward_tsn_chunk.cc", + "chunk/iforward_tsn_chunk.h", + "chunk/init_ack_chunk.cc", + "chunk/init_ack_chunk.h", + "chunk/init_chunk.cc", + "chunk/init_chunk.h", + "chunk/reconfig_chunk.cc", + "chunk/reconfig_chunk.h", + "chunk/sack_chunk.cc", + "chunk/sack_chunk.h", + "chunk/shutdown_ack_chunk.cc", + "chunk/shutdown_ack_chunk.h", + "chunk/shutdown_chunk.cc", + "chunk/shutdown_chunk.h", + "chunk/shutdown_complete_chunk.cc", + "chunk/shutdown_complete_chunk.h", + ] + absl_deps = [ + "//third_party/abseil-cpp/absl/algorithm:container", + "//third_party/abseil-cpp/absl/strings", + "//third_party/abseil-cpp/absl/types:optional", + ] +} + +rtc_library("chunk_validators") { + deps = [ + ":chunk", + "../../../rtc_base:checks", + "../../../rtc_base:logging", + ] + sources = [ + "chunk_validators.cc", + "chunk_validators.h", + ] +} + +rtc_library("sctp_packet") { + deps = [ + ":bounded_io", + ":chunk", + ":crc32c", + "../../../api:array_view", + "../../../rtc_base:checks", + "../../../rtc_base:logging", + "../../../rtc_base:stringutils", + "../common:internal_types", + "../common:math", + "../public:types", + ] + sources = [ + "sctp_packet.cc", + "sctp_packet.h", + ] + absl_deps = [ + "//third_party/abseil-cpp/absl/memory:memory", + "//third_party/abseil-cpp/absl/types:optional", + ] +} + +if (rtc_include_tests) { + rtc_library("dcsctp_packet_unittests") { + testonly = true + + deps = [ + ":bounded_io", + ":chunk", + ":chunk_validators", + ":crc32c", + ":error_cause", + ":parameter", + ":sctp_packet", + ":tlv_trait", + "../../../api:array_view", + "../../../rtc_base:buffer", + "../../../rtc_base:checks", + "../../../rtc_base:gunit_helpers", + "../../../test:test_support", + "../common:internal_types", + "../common:math", + "../public:types", + "../testing:testing_macros", + ] + sources = [ + "bounded_byte_reader_test.cc", + "bounded_byte_writer_test.cc", + "chunk/abort_chunk_test.cc", + "chunk/cookie_ack_chunk_test.cc", + "chunk/cookie_echo_chunk_test.cc", + "chunk/data_chunk_test.cc", + "chunk/error_chunk_test.cc", + "chunk/forward_tsn_chunk_test.cc", + "chunk/heartbeat_ack_chunk_test.cc", + "chunk/heartbeat_request_chunk_test.cc", + "chunk/idata_chunk_test.cc", + "chunk/iforward_tsn_chunk_test.cc", + "chunk/init_ack_chunk_test.cc", + "chunk/init_chunk_test.cc", + "chunk/reconfig_chunk_test.cc", + "chunk/sack_chunk_test.cc", + "chunk/shutdown_ack_chunk_test.cc", + "chunk/shutdown_chunk_test.cc", + "chunk/shutdown_complete_chunk_test.cc", + "chunk_validators_test.cc", + "crc32c_test.cc", + "error_cause/cookie_received_while_shutting_down_cause_test.cc", + "error_cause/invalid_mandatory_parameter_cause_test.cc", + "error_cause/invalid_stream_identifier_cause_test.cc", + "error_cause/missing_mandatory_parameter_cause_test.cc", + "error_cause/no_user_data_cause_test.cc", + "error_cause/out_of_resource_error_cause_test.cc", + "error_cause/protocol_violation_cause_test.cc", + "error_cause/restart_of_an_association_with_new_address_cause_test.cc", + "error_cause/stale_cookie_error_cause_test.cc", + "error_cause/unrecognized_chunk_type_cause_test.cc", + "error_cause/unrecognized_parameter_cause_test.cc", + "error_cause/unresolvable_address_cause_test.cc", + "error_cause/user_initiated_abort_cause_test.cc", + "parameter/add_incoming_streams_request_parameter_test.cc", + "parameter/add_outgoing_streams_request_parameter_test.cc", + "parameter/forward_tsn_supported_parameter_test.cc", + "parameter/incoming_ssn_reset_request_parameter_test.cc", + "parameter/outgoing_ssn_reset_request_parameter_test.cc", + "parameter/parameter_test.cc", + "parameter/reconfiguration_response_parameter_test.cc", + "parameter/ssn_tsn_reset_request_parameter_test.cc", + "parameter/state_cookie_parameter_test.cc", + "parameter/supported_extensions_parameter_test.cc", + "sctp_packet_test.cc", + "tlv_trait_test.cc", + ] + absl_deps = [ "//third_party/abseil-cpp/absl/types:optional" ] + } +} diff --git a/third_party/libwebrtc/net/dcsctp/packet/bounded_byte_reader.h b/third_party/libwebrtc/net/dcsctp/packet/bounded_byte_reader.h new file mode 100644 index 0000000000..603ed6ac33 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/bounded_byte_reader.h @@ -0,0 +1,99 @@ +/* + * Copyright (c) 2021 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. + */ + +#ifndef NET_DCSCTP_PACKET_BOUNDED_BYTE_READER_H_ +#define NET_DCSCTP_PACKET_BOUNDED_BYTE_READER_H_ + +#include <cstdint> + +#include "api/array_view.h" + +namespace dcsctp { + +// TODO(boivie): These generic functions - and possibly this entire class - +// could be a candidate to have added to rtc_base/. They should use compiler +// intrinsics as well. +namespace internal { +// Loads a 8-bit unsigned word at `data`. +inline uint8_t LoadBigEndian8(const uint8_t* data) { + return data[0]; +} + +// Loads a 16-bit unsigned word at `data`. +inline uint16_t LoadBigEndian16(const uint8_t* data) { + return (data[0] << 8) | data[1]; +} + +// Loads a 32-bit unsigned word at `data`. +inline uint32_t LoadBigEndian32(const uint8_t* data) { + return (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3]; +} +} // namespace internal + +// BoundedByteReader wraps an ArrayView and divides it into two parts; A fixed +// size - which is the template parameter - and a variable size, which is what +// remains in `data` after the `FixedSize`. +// +// The BoundedByteReader provides methods to load/read big endian numbers from +// the FixedSize portion of the buffer, and these are read with static bounds +// checking, to avoid out-of-bounds accesses without a run-time penalty. +// +// The variable sized portion can either be used to create sub-readers, which +// themselves would provide compile-time bounds-checking, or the entire variable +// sized portion can be retrieved as an ArrayView. +template <int FixedSize> +class BoundedByteReader { + public: + explicit BoundedByteReader(rtc::ArrayView<const uint8_t> data) : data_(data) { + RTC_CHECK(data.size() >= FixedSize); + } + + template <size_t offset> + uint8_t Load8() const { + static_assert(offset + sizeof(uint8_t) <= FixedSize, "Out-of-bounds"); + return internal::LoadBigEndian8(&data_[offset]); + } + + template <size_t offset> + uint16_t Load16() const { + static_assert(offset + sizeof(uint16_t) <= FixedSize, "Out-of-bounds"); + static_assert((offset % sizeof(uint16_t)) == 0, "Unaligned access"); + return internal::LoadBigEndian16(&data_[offset]); + } + + template <size_t offset> + uint32_t Load32() const { + static_assert(offset + sizeof(uint32_t) <= FixedSize, "Out-of-bounds"); + static_assert((offset % sizeof(uint32_t)) == 0, "Unaligned access"); + return internal::LoadBigEndian32(&data_[offset]); + } + + template <size_t SubSize> + BoundedByteReader<SubSize> sub_reader(size_t variable_offset) const { + RTC_CHECK(FixedSize + variable_offset + SubSize <= data_.size()); + + rtc::ArrayView<const uint8_t> sub_span = + data_.subview(FixedSize + variable_offset, SubSize); + return BoundedByteReader<SubSize>(sub_span); + } + + size_t variable_data_size() const { return data_.size() - FixedSize; } + + rtc::ArrayView<const uint8_t> variable_data() const { + return data_.subview(FixedSize, data_.size() - FixedSize); + } + + private: + const rtc::ArrayView<const uint8_t> data_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_BOUNDED_BYTE_READER_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/bounded_byte_reader_test.cc b/third_party/libwebrtc/net/dcsctp/packet/bounded_byte_reader_test.cc new file mode 100644 index 0000000000..2fb4a86785 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/bounded_byte_reader_test.cc @@ -0,0 +1,43 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/bounded_byte_reader.h" + +#include "api/array_view.h" +#include "rtc_base/buffer.h" +#include "rtc_base/checks.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(BoundedByteReaderTest, CanLoadData) { + uint8_t data[14] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4}; + + BoundedByteReader<8> reader(data); + EXPECT_EQ(reader.variable_data_size(), 6U); + EXPECT_EQ(reader.Load32<0>(), 0x01020304U); + EXPECT_EQ(reader.Load32<4>(), 0x05060708U); + EXPECT_EQ(reader.Load16<4>(), 0x0506U); + EXPECT_EQ(reader.Load8<4>(), 0x05U); + EXPECT_EQ(reader.Load8<5>(), 0x06U); + + BoundedByteReader<6> sub = reader.sub_reader<6>(0); + EXPECT_EQ(sub.Load16<0>(), 0x0900U); + EXPECT_EQ(sub.Load32<0>(), 0x09000102U); + EXPECT_EQ(sub.Load16<4>(), 0x0304U); + + EXPECT_THAT(reader.variable_data(), ElementsAre(9, 0, 1, 2, 3, 4)); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/bounded_byte_writer.h b/third_party/libwebrtc/net/dcsctp/packet/bounded_byte_writer.h new file mode 100644 index 0000000000..d754549e4f --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/bounded_byte_writer.h @@ -0,0 +1,103 @@ +/* + * Copyright (c) 2021 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. + */ + +#ifndef NET_DCSCTP_PACKET_BOUNDED_BYTE_WRITER_H_ +#define NET_DCSCTP_PACKET_BOUNDED_BYTE_WRITER_H_ + +#include <algorithm> + +#include "api/array_view.h" + +namespace dcsctp { + +// TODO(boivie): These generic functions - and possibly this entire class - +// could be a candidate to have added to rtc_base/. They should use compiler +// intrinsics as well. +namespace internal { +// Stores a 8-bit unsigned word at `data`. +inline void StoreBigEndian8(uint8_t* data, uint8_t val) { + data[0] = val; +} + +// Stores a 16-bit unsigned word at `data`. +inline void StoreBigEndian16(uint8_t* data, uint16_t val) { + data[0] = val >> 8; + data[1] = val; +} + +// Stores a 32-bit unsigned word at `data`. +inline void StoreBigEndian32(uint8_t* data, uint32_t val) { + data[0] = val >> 24; + data[1] = val >> 16; + data[2] = val >> 8; + data[3] = val; +} +} // namespace internal + +// BoundedByteWriter wraps an ArrayView and divides it into two parts; A fixed +// size - which is the template parameter - and a variable size, which is what +// remains in `data` after the `FixedSize`. +// +// The BoundedByteWriter provides methods to write big endian numbers to the +// FixedSize portion of the buffer, and these are written with static bounds +// checking, to avoid out-of-bounds accesses without a run-time penalty. +// +// The variable sized portion can either be used to create sub-writers, which +// themselves would provide compile-time bounds-checking, or data can be copied +// to it. +template <int FixedSize> +class BoundedByteWriter { + public: + explicit BoundedByteWriter(rtc::ArrayView<uint8_t> data) : data_(data) { + RTC_CHECK(data.size() >= FixedSize); + } + + template <size_t offset> + void Store8(uint8_t value) { + static_assert(offset + sizeof(uint8_t) <= FixedSize, "Out-of-bounds"); + internal::StoreBigEndian8(&data_[offset], value); + } + + template <size_t offset> + void Store16(uint16_t value) { + static_assert(offset + sizeof(uint16_t) <= FixedSize, "Out-of-bounds"); + static_assert((offset % sizeof(uint16_t)) == 0, "Unaligned access"); + internal::StoreBigEndian16(&data_[offset], value); + } + + template <size_t offset> + void Store32(uint32_t value) { + static_assert(offset + sizeof(uint32_t) <= FixedSize, "Out-of-bounds"); + static_assert((offset % sizeof(uint32_t)) == 0, "Unaligned access"); + internal::StoreBigEndian32(&data_[offset], value); + } + + template <size_t SubSize> + BoundedByteWriter<SubSize> sub_writer(size_t variable_offset) { + RTC_CHECK(FixedSize + variable_offset + SubSize <= data_.size()); + + return BoundedByteWriter<SubSize>( + data_.subview(FixedSize + variable_offset, SubSize)); + } + + void CopyToVariableData(rtc::ArrayView<const uint8_t> source) { + size_t copy_size = std::min(source.size(), data_.size() - FixedSize); + if (source.data() == nullptr || copy_size == 0) { + return; + } + memcpy(data_.data() + FixedSize, source.data(), copy_size); + } + + private: + rtc::ArrayView<uint8_t> data_; +}; +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_BOUNDED_BYTE_WRITER_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/bounded_byte_writer_test.cc b/third_party/libwebrtc/net/dcsctp/packet/bounded_byte_writer_test.cc new file mode 100644 index 0000000000..3cea0a2f7c --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/bounded_byte_writer_test.cc @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/bounded_byte_writer.h" + +#include <vector> + +#include "api/array_view.h" +#include "rtc_base/buffer.h" +#include "rtc_base/checks.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(BoundedByteWriterTest, CanWriteData) { + std::vector<uint8_t> data(14); + + BoundedByteWriter<8> writer(data); + writer.Store32<0>(0x01020304); + writer.Store16<4>(0x0506); + writer.Store8<6>(0x07); + writer.Store8<7>(0x08); + + uint8_t variable_data[] = {0, 0, 0, 0, 3, 0}; + writer.CopyToVariableData(variable_data); + + BoundedByteWriter<6> sub = writer.sub_writer<6>(0); + sub.Store32<0>(0x09000000); + sub.Store16<2>(0x0102); + + BoundedByteWriter<2> sub2 = writer.sub_writer<2>(4); + sub2.Store8<1>(0x04); + + EXPECT_THAT(data, ElementsAre(1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4)); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/abort_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/abort_chunk.cc new file mode 100644 index 0000000000..8348eb96a9 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/abort_chunk.cc @@ -0,0 +1,65 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/abort_chunk.h" + +#include <stdint.h> + +#include <utility> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.7 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 6 |Reserved |T| Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// \ \ +// / zero or more Error Causes / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int AbortChunk::kType; + +absl::optional<AbortChunk> AbortChunk::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + absl::optional<Parameters> error_causes = + Parameters::Parse(reader->variable_data()); + if (!error_causes.has_value()) { + return absl::nullopt; + } + uint8_t flags = reader->Load8<1>(); + bool filled_in_verification_tag = (flags & (1 << kFlagsBitT)) == 0; + return AbortChunk(filled_in_verification_tag, *std::move(error_causes)); +} + +void AbortChunk::SerializeTo(std::vector<uint8_t>& out) const { + rtc::ArrayView<const uint8_t> error_causes = error_causes_.data(); + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, error_causes.size()); + writer.Store8<1>(filled_in_verification_tag_ ? 0 : (1 << kFlagsBitT)); + writer.CopyToVariableData(error_causes); +} + +std::string AbortChunk::ToString() const { + return "ABORT"; +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/abort_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/abort_chunk.h new file mode 100644 index 0000000000..1408a75e80 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/abort_chunk.h @@ -0,0 +1,64 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_ABORT_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_ABORT_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.7 +struct AbortChunkConfig : ChunkConfig { + static constexpr int kType = 6; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class AbortChunk : public Chunk, public TLVTrait<AbortChunkConfig> { + public: + static constexpr int kType = AbortChunkConfig::kType; + + AbortChunk(bool filled_in_verification_tag, Parameters error_causes) + : filled_in_verification_tag_(filled_in_verification_tag), + error_causes_(std::move(error_causes)) {} + + AbortChunk(AbortChunk&& other) = default; + AbortChunk& operator=(AbortChunk&& other) = default; + + static absl::optional<AbortChunk> Parse(rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + bool filled_in_verification_tag() const { + return filled_in_verification_tag_; + } + + const Parameters& error_causes() const { return error_causes_; } + + private: + static constexpr int kFlagsBitT = 0; + bool filled_in_verification_tag_; + Parameters error_causes_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_ABORT_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/abort_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/abort_chunk_test.cc new file mode 100644 index 0000000000..c1f3a4d5b9 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/abort_chunk_test.cc @@ -0,0 +1,83 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/abort_chunk.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/error_cause/user_initiated_abort_cause.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { + +TEST(AbortChunkTest, FromCapture) { + /* + ABORT chunk + Chunk type: ABORT (6) + Chunk flags: 0x00 + Chunk length: 8 + User initiated ABORT cause + */ + + uint8_t data[] = {0x06, 0x00, 0x00, 0x08, 0x00, 0x0c, 0x00, 0x04}; + + ASSERT_HAS_VALUE_AND_ASSIGN(AbortChunk chunk, AbortChunk::Parse(data)); + + ASSERT_HAS_VALUE_AND_ASSIGN( + UserInitiatedAbortCause cause, + chunk.error_causes().get<UserInitiatedAbortCause>()); + + EXPECT_EQ(cause.upper_layer_abort_reason(), ""); +} + +TEST(AbortChunkTest, SerializeAndDeserialize) { + AbortChunk chunk(/*filled_in_verification_tag=*/true, + Parameters::Builder() + .Add(UserInitiatedAbortCause("Close called")) + .Build()); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(AbortChunk deserialized, + AbortChunk::Parse(serialized)); + ASSERT_HAS_VALUE_AND_ASSIGN( + UserInitiatedAbortCause cause, + deserialized.error_causes().get<UserInitiatedAbortCause>()); + + EXPECT_EQ(cause.upper_layer_abort_reason(), "Close called"); +} + +// Validates that AbortChunk doesn't make any alignment assumptions. +TEST(AbortChunkTest, SerializeAndDeserializeOneChar) { + AbortChunk chunk( + /*filled_in_verification_tag=*/true, + Parameters::Builder().Add(UserInitiatedAbortCause("!")).Build()); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(AbortChunk deserialized, + AbortChunk::Parse(serialized)); + ASSERT_HAS_VALUE_AND_ASSIGN( + UserInitiatedAbortCause cause, + deserialized.error_causes().get<UserInitiatedAbortCause>()); + + EXPECT_EQ(cause.upper_layer_abort_reason(), "!"); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/chunk.cc new file mode 100644 index 0000000000..832ab82288 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/chunk.cc @@ -0,0 +1,85 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/chunk.h" + +#include <cstdint> +#include <memory> +#include <utility> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/common/math.h" +#include "net/dcsctp/packet/chunk/abort_chunk.h" +#include "net/dcsctp/packet/chunk/cookie_ack_chunk.h" +#include "net/dcsctp/packet/chunk/cookie_echo_chunk.h" +#include "net/dcsctp/packet/chunk/data_chunk.h" +#include "net/dcsctp/packet/chunk/error_chunk.h" +#include "net/dcsctp/packet/chunk/forward_tsn_chunk.h" +#include "net/dcsctp/packet/chunk/heartbeat_ack_chunk.h" +#include "net/dcsctp/packet/chunk/heartbeat_request_chunk.h" +#include "net/dcsctp/packet/chunk/idata_chunk.h" +#include "net/dcsctp/packet/chunk/iforward_tsn_chunk.h" +#include "net/dcsctp/packet/chunk/init_ack_chunk.h" +#include "net/dcsctp/packet/chunk/init_chunk.h" +#include "net/dcsctp/packet/chunk/reconfig_chunk.h" +#include "net/dcsctp/packet/chunk/sack_chunk.h" +#include "net/dcsctp/packet/chunk/shutdown_ack_chunk.h" +#include "net/dcsctp/packet/chunk/shutdown_chunk.h" +#include "net/dcsctp/packet/chunk/shutdown_complete_chunk.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +template <class Chunk> +bool ParseAndPrint(uint8_t chunk_type, + rtc::ArrayView<const uint8_t> data, + rtc::StringBuilder& sb) { + if (chunk_type == Chunk::kType) { + absl::optional<Chunk> c = Chunk::Parse(data); + if (c.has_value()) { + sb << c->ToString(); + } else { + sb << "Failed to parse chunk of type " << chunk_type; + } + return true; + } + return false; +} + +std::string DebugConvertChunkToString(rtc::ArrayView<const uint8_t> data) { + rtc::StringBuilder sb; + + if (data.empty()) { + sb << "Failed to parse chunk due to empty data"; + } else { + uint8_t chunk_type = data[0]; + if (!ParseAndPrint<DataChunk>(chunk_type, data, sb) && + !ParseAndPrint<InitChunk>(chunk_type, data, sb) && + !ParseAndPrint<InitAckChunk>(chunk_type, data, sb) && + !ParseAndPrint<SackChunk>(chunk_type, data, sb) && + !ParseAndPrint<HeartbeatRequestChunk>(chunk_type, data, sb) && + !ParseAndPrint<HeartbeatAckChunk>(chunk_type, data, sb) && + !ParseAndPrint<AbortChunk>(chunk_type, data, sb) && + !ParseAndPrint<ErrorChunk>(chunk_type, data, sb) && + !ParseAndPrint<CookieEchoChunk>(chunk_type, data, sb) && + !ParseAndPrint<CookieAckChunk>(chunk_type, data, sb) && + !ParseAndPrint<ShutdownChunk>(chunk_type, data, sb) && + !ParseAndPrint<ShutdownAckChunk>(chunk_type, data, sb) && + !ParseAndPrint<ShutdownCompleteChunk>(chunk_type, data, sb) && + !ParseAndPrint<ReConfigChunk>(chunk_type, data, sb) && + !ParseAndPrint<ForwardTsnChunk>(chunk_type, data, sb) && + !ParseAndPrint<IDataChunk>(chunk_type, data, sb) && + !ParseAndPrint<IForwardTsnChunk>(chunk_type, data, sb)) { + sb << "Unhandled chunk type: " << static_cast<int>(chunk_type); + } + } + return sb.Release(); +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/chunk.h new file mode 100644 index 0000000000..687aa1daa1 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/chunk.h @@ -0,0 +1,63 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_CHUNK_H_ + +#include <stddef.h> +#include <sys/types.h> + +#include <cstdint> +#include <iterator> +#include <memory> +#include <string> +#include <utility> +#include <vector> + +#include "absl/algorithm/container.h" +#include "absl/strings/string_view.h" +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/data.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// Base class for all SCTP chunks +class Chunk { + public: + Chunk() {} + virtual ~Chunk() = default; + + // Chunks can contain data payloads that shouldn't be copied unnecessarily. + Chunk(Chunk&& other) = default; + Chunk& operator=(Chunk&& other) = default; + Chunk(const Chunk&) = delete; + Chunk& operator=(const Chunk&) = delete; + + // Serializes the chunk to `out`, growing it as necessary. + virtual void SerializeTo(std::vector<uint8_t>& out) const = 0; + + // Returns a human readable description of this chunk and its parameters. + virtual std::string ToString() const = 0; +}; + +// Introspects the chunk in `data` and returns a human readable textual +// representation of it, to be used in debugging. +std::string DebugConvertChunkToString(rtc::ArrayView<const uint8_t> data); + +struct ChunkConfig { + static constexpr int kTypeSizeInBytes = 1; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_ack_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_ack_chunk.cc new file mode 100644 index 0000000000..4839969ccf --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_ack_chunk.cc @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/cookie_ack_chunk.h" + +#include <stdint.h> + +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.12 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 11 |Chunk Flags | Length = 4 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int CookieAckChunk::kType; + +absl::optional<CookieAckChunk> CookieAckChunk::Parse( + rtc::ArrayView<const uint8_t> data) { + if (!ParseTLV(data).has_value()) { + return absl::nullopt; + } + return CookieAckChunk(); +} + +void CookieAckChunk::SerializeTo(std::vector<uint8_t>& out) const { + AllocateTLV(out); +} + +std::string CookieAckChunk::ToString() const { + return "COOKIE-ACK"; +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_ack_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_ack_chunk.h new file mode 100644 index 0000000000..f7d4a33f7d --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_ack_chunk.h @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_COOKIE_ACK_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_COOKIE_ACK_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.12 +struct CookieAckChunkConfig : ChunkConfig { + static constexpr int kType = 11; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 0; +}; + +class CookieAckChunk : public Chunk, public TLVTrait<CookieAckChunkConfig> { + public: + static constexpr int kType = CookieAckChunkConfig::kType; + + CookieAckChunk() {} + + static absl::optional<CookieAckChunk> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; +}; +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_COOKIE_ACK_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_ack_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_ack_chunk_test.cc new file mode 100644 index 0000000000..3f560c6fef --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_ack_chunk_test.cc @@ -0,0 +1,49 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/cookie_ack_chunk.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { + +TEST(CookieAckChunkTest, FromCapture) { + /* + COOKIE_ACK chunk + Chunk type: COOKIE_ACK (11) + Chunk flags: 0x00 + Chunk length: 4 + */ + + uint8_t data[] = {0x0b, 0x00, 0x00, 0x04}; + + EXPECT_TRUE(CookieAckChunk::Parse(data).has_value()); +} + +TEST(CookieAckChunkTest, SerializeAndDeserialize) { + CookieAckChunk chunk; + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(CookieAckChunk deserialized, + CookieAckChunk::Parse(serialized)); + EXPECT_EQ(deserialized.ToString(), "COOKIE-ACK"); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_echo_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_echo_chunk.cc new file mode 100644 index 0000000000..a01d0b13c4 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_echo_chunk.cc @@ -0,0 +1,54 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/cookie_echo_chunk.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.11 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 10 |Chunk Flags | Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// / Cookie / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int CookieEchoChunk::kType; + +absl::optional<CookieEchoChunk> CookieEchoChunk::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + return CookieEchoChunk(reader->variable_data()); +} + +void CookieEchoChunk::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, cookie_.size()); + writer.CopyToVariableData(cookie_); +} + +std::string CookieEchoChunk::ToString() const { + return "COOKIE-ECHO"; +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_echo_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_echo_chunk.h new file mode 100644 index 0000000000..8cb80527f8 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_echo_chunk.h @@ -0,0 +1,53 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_COOKIE_ECHO_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_COOKIE_ECHO_CHUNK_H_ +#include <stddef.h> + +#include <cstdint> +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.11 +struct CookieEchoChunkConfig : ChunkConfig { + static constexpr int kType = 10; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class CookieEchoChunk : public Chunk, public TLVTrait<CookieEchoChunkConfig> { + public: + static constexpr int kType = CookieEchoChunkConfig::kType; + + explicit CookieEchoChunk(rtc::ArrayView<const uint8_t> cookie) + : cookie_(cookie.begin(), cookie.end()) {} + + static absl::optional<CookieEchoChunk> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + rtc::ArrayView<const uint8_t> cookie() const { return cookie_; } + + private: + std::vector<uint8_t> cookie_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_COOKIE_ECHO_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_echo_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_echo_chunk_test.cc new file mode 100644 index 0000000000..d06e0a6439 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/cookie_echo_chunk_test.cc @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/cookie_echo_chunk.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(CookieEchoChunkTest, FromCapture) { + /* + COOKIE_ECHO chunk (Cookie length: 256 bytes) + Chunk type: COOKIE_ECHO (10) + Chunk flags: 0x00 + Chunk length: 260 + Cookie: 12345678 + */ + + uint8_t data[] = {0x0a, 0x00, 0x00, 0x08, 0x12, 0x34, 0x56, 0x78}; + + ASSERT_HAS_VALUE_AND_ASSIGN(CookieEchoChunk chunk, + CookieEchoChunk::Parse(data)); + + EXPECT_THAT(chunk.cookie(), ElementsAre(0x12, 0x34, 0x56, 0x78)); +} + +TEST(CookieEchoChunkTest, SerializeAndDeserialize) { + uint8_t cookie[] = {1, 2, 3, 4}; + CookieEchoChunk chunk(cookie); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(CookieEchoChunk deserialized, + CookieEchoChunk::Parse(serialized)); + + EXPECT_THAT(deserialized.cookie(), ElementsAre(1, 2, 3, 4)); + EXPECT_EQ(deserialized.ToString(), "COOKIE-ECHO"); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/data_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/data_chunk.cc new file mode 100644 index 0000000000..769be2db91 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/data_chunk.cc @@ -0,0 +1,101 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/data_chunk.h" + +#include <stdint.h> + +#include <string> +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/chunk/data_common.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.1 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 0 | Reserved|U|B|E| Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | TSN | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Stream Identifier S | Stream Sequence Number n | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Payload Protocol Identifier | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// \ \ +// / User Data (seq n of Stream S) / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int DataChunk::kType; + +absl::optional<DataChunk> DataChunk::Parse(rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + uint8_t flags = reader->Load8<1>(); + TSN tsn(reader->Load32<4>()); + StreamID stream_identifier(reader->Load16<8>()); + SSN ssn(reader->Load16<10>()); + PPID ppid(reader->Load32<12>()); + + Options options; + options.is_end = Data::IsEnd((flags & (1 << kFlagsBitEnd)) != 0); + options.is_beginning = + Data::IsBeginning((flags & (1 << kFlagsBitBeginning)) != 0); + options.is_unordered = IsUnordered((flags & (1 << kFlagsBitUnordered)) != 0); + options.immediate_ack = + ImmediateAckFlag((flags & (1 << kFlagsBitImmediateAck)) != 0); + + return DataChunk(tsn, stream_identifier, ssn, ppid, + std::vector<uint8_t>(reader->variable_data().begin(), + reader->variable_data().end()), + options); +} + +void DataChunk::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, payload().size()); + + writer.Store8<1>( + (*options().is_end ? (1 << kFlagsBitEnd) : 0) | + (*options().is_beginning ? (1 << kFlagsBitBeginning) : 0) | + (*options().is_unordered ? (1 << kFlagsBitUnordered) : 0) | + (*options().immediate_ack ? (1 << kFlagsBitImmediateAck) : 0)); + writer.Store32<4>(*tsn()); + writer.Store16<8>(*stream_id()); + writer.Store16<10>(*ssn()); + writer.Store32<12>(*ppid()); + + writer.CopyToVariableData(payload()); +} + +std::string DataChunk::ToString() const { + rtc::StringBuilder sb; + sb << "DATA, type=" << (options().is_unordered ? "unordered" : "ordered") + << "::" + << (*options().is_beginning && *options().is_end + ? "complete" + : *options().is_beginning ? "first" + : *options().is_end ? "last" : "middle") + << ", tsn=" << *tsn() << ", sid=" << *stream_id() << ", ssn=" << *ssn() + << ", ppid=" << *ppid() << ", length=" << payload().size(); + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/data_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/data_chunk.h new file mode 100644 index 0000000000..12bb05f2c4 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/data_chunk.h @@ -0,0 +1,70 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_DATA_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_DATA_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <cstdint> +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/chunk/data_common.h" +#include "net/dcsctp/packet/data.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.1 +struct DataChunkConfig : ChunkConfig { + static constexpr int kType = 0; + static constexpr size_t kHeaderSize = 16; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class DataChunk : public AnyDataChunk, public TLVTrait<DataChunkConfig> { + public: + static constexpr int kType = DataChunkConfig::kType; + + // Exposed to allow the retransmission queue to make room for the correct + // header size. + static constexpr size_t kHeaderSize = DataChunkConfig::kHeaderSize; + + DataChunk(TSN tsn, + StreamID stream_id, + SSN ssn, + PPID ppid, + std::vector<uint8_t> payload, + const Options& options) + : AnyDataChunk(tsn, + stream_id, + ssn, + MID(0), + FSN(0), + ppid, + std::move(payload), + options) {} + + DataChunk(TSN tsn, Data&& data, bool immediate_ack) + : AnyDataChunk(tsn, std::move(data), immediate_ack) {} + + static absl::optional<DataChunk> Parse(rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_DATA_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/data_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/data_chunk_test.cc new file mode 100644 index 0000000000..def99ceb23 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/data_chunk_test.cc @@ -0,0 +1,74 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/data_chunk.h" + +#include <cstdint> +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(DataChunkTest, FromCapture) { + /* + DATA chunk(ordered, complete segment, TSN: 1426601532, SID: 2, SSN: 1, + PPID: 53, payload length: 4 bytes) + Chunk type: DATA (0) + Chunk flags: 0x03 + Chunk length: 20 + Transmission sequence number: 1426601532 + Stream identifier: 0x0002 + Stream sequence number: 1 + Payload protocol identifier: WebRTC Binary (53) + */ + + uint8_t data[] = {0x00, 0x03, 0x00, 0x14, 0x55, 0x08, 0x36, 0x3c, 0x00, 0x02, + 0x00, 0x01, 0x00, 0x00, 0x00, 0x35, 0x00, 0x01, 0x02, 0x03}; + + ASSERT_HAS_VALUE_AND_ASSIGN(DataChunk chunk, DataChunk::Parse(data)); + EXPECT_EQ(*chunk.tsn(), 1426601532u); + EXPECT_EQ(*chunk.stream_id(), 2u); + EXPECT_EQ(*chunk.ssn(), 1u); + EXPECT_EQ(*chunk.ppid(), 53u); + EXPECT_TRUE(*chunk.options().is_beginning); + EXPECT_TRUE(*chunk.options().is_end); + EXPECT_FALSE(*chunk.options().is_unordered); + EXPECT_FALSE(*chunk.options().immediate_ack); + EXPECT_THAT(chunk.payload(), ElementsAre(0x0, 0x1, 0x2, 0x3)); +} + +TEST(DataChunkTest, SerializeAndDeserialize) { + DataChunk chunk(TSN(123), StreamID(456), SSN(789), PPID(9090), + /*payload=*/{1, 2, 3, 4, 5}, + /*options=*/{}); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(DataChunk deserialized, + DataChunk::Parse(serialized)); + EXPECT_EQ(*chunk.tsn(), 123u); + EXPECT_EQ(*chunk.stream_id(), 456u); + EXPECT_EQ(*chunk.ssn(), 789u); + EXPECT_EQ(*chunk.ppid(), 9090u); + EXPECT_THAT(chunk.payload(), ElementsAre(1, 2, 3, 4, 5)); + + EXPECT_EQ(deserialized.ToString(), + "DATA, type=ordered::middle, tsn=123, sid=456, ssn=789, ppid=9090, " + "length=5"); +} +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/data_common.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/data_common.h new file mode 100644 index 0000000000..b67efeee1e --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/data_common.h @@ -0,0 +1,97 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_DATA_COMMON_H_ +#define NET_DCSCTP_PACKET_CHUNK_DATA_COMMON_H_ +#include <stdint.h> + +#include <utility> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/data.h" + +namespace dcsctp { + +// Base class for DataChunk and IDataChunk +class AnyDataChunk : public Chunk { + public: + // Represents the "immediate ack" flag on DATA/I-DATA, from RFC7053. + using ImmediateAckFlag = webrtc::StrongAlias<class ImmediateAckFlagTag, bool>; + + // Data chunk options. + // See https://tools.ietf.org/html/rfc4960#section-3.3.1 + struct Options { + Data::IsEnd is_end = Data::IsEnd(false); + Data::IsBeginning is_beginning = Data::IsBeginning(false); + IsUnordered is_unordered = IsUnordered(false); + ImmediateAckFlag immediate_ack = ImmediateAckFlag(false); + }; + + TSN tsn() const { return tsn_; } + + Options options() const { + Options options; + options.is_end = data_.is_end; + options.is_beginning = data_.is_beginning; + options.is_unordered = data_.is_unordered; + options.immediate_ack = immediate_ack_; + return options; + } + + StreamID stream_id() const { return data_.stream_id; } + SSN ssn() const { return data_.ssn; } + MID message_id() const { return data_.message_id; } + FSN fsn() const { return data_.fsn; } + PPID ppid() const { return data_.ppid; } + rtc::ArrayView<const uint8_t> payload() const { return data_.payload; } + + // Extracts the Data from the chunk, as a destructive action. + Data extract() && { return std::move(data_); } + + AnyDataChunk(TSN tsn, + StreamID stream_id, + SSN ssn, + MID message_id, + FSN fsn, + PPID ppid, + std::vector<uint8_t> payload, + const Options& options) + : tsn_(tsn), + data_(stream_id, + ssn, + message_id, + fsn, + ppid, + std::move(payload), + options.is_beginning, + options.is_end, + options.is_unordered), + immediate_ack_(options.immediate_ack) {} + + AnyDataChunk(TSN tsn, Data data, bool immediate_ack) + : tsn_(tsn), data_(std::move(data)), immediate_ack_(immediate_ack) {} + + protected: + // Bits in `flags` header field. + static constexpr int kFlagsBitEnd = 0; + static constexpr int kFlagsBitBeginning = 1; + static constexpr int kFlagsBitUnordered = 2; + static constexpr int kFlagsBitImmediateAck = 3; + + private: + TSN tsn_; + Data data_; + ImmediateAckFlag immediate_ack_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_DATA_COMMON_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/error_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/error_chunk.cc new file mode 100644 index 0000000000..baac0c5588 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/error_chunk.cc @@ -0,0 +1,62 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/error_chunk.h" + +#include <stdint.h> + +#include <utility> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 9 | Chunk Flags | Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// \ \ +// / one or more Error Causes / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int ErrorChunk::kType; + +absl::optional<ErrorChunk> ErrorChunk::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + absl::optional<Parameters> error_causes = + Parameters::Parse(reader->variable_data()); + if (!error_causes.has_value()) { + return absl::nullopt; + } + return ErrorChunk(*std::move(error_causes)); +} + +void ErrorChunk::SerializeTo(std::vector<uint8_t>& out) const { + rtc::ArrayView<const uint8_t> error_causes = error_causes_.data(); + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, error_causes.size()); + writer.CopyToVariableData(error_causes); +} + +std::string ErrorChunk::ToString() const { + return "ERROR"; +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/error_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/error_chunk.h new file mode 100644 index 0000000000..96122cff6a --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/error_chunk.h @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_ERROR_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_ERROR_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10 +struct ErrorChunkConfig : ChunkConfig { + static constexpr int kType = 9; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 4; +}; + +class ErrorChunk : public Chunk, public TLVTrait<ErrorChunkConfig> { + public: + static constexpr int kType = ErrorChunkConfig::kType; + + explicit ErrorChunk(Parameters error_causes) + : error_causes_(std::move(error_causes)) {} + + ErrorChunk(ErrorChunk&& other) = default; + ErrorChunk& operator=(ErrorChunk&& other) = default; + + static absl::optional<ErrorChunk> Parse(rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + const Parameters& error_causes() const { return error_causes_; } + + private: + Parameters error_causes_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_ERROR_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/error_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/error_chunk_test.cc new file mode 100644 index 0000000000..f2b8be1edc --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/error_chunk_test.cc @@ -0,0 +1,66 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/error_chunk.h" + +#include <cstdint> +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(ErrorChunkTest, FromCapture) { + /* + ERROR chunk + Chunk type: ERROR (9) + Chunk flags: 0x00 + Chunk length: 12 + Unrecognized chunk type cause (Type: 73 (unknown)) + */ + + uint8_t data[] = {0x09, 0x00, 0x00, 0x0c, 0x00, 0x06, + 0x00, 0x08, 0x49, 0x00, 0x00, 0x04}; + + ASSERT_HAS_VALUE_AND_ASSIGN(ErrorChunk chunk, ErrorChunk::Parse(data)); + + ASSERT_HAS_VALUE_AND_ASSIGN( + UnrecognizedChunkTypeCause cause, + chunk.error_causes().get<UnrecognizedChunkTypeCause>()); + + EXPECT_THAT(cause.unrecognized_chunk(), ElementsAre(0x49, 0x00, 0x00, 0x04)); +} + +TEST(ErrorChunkTest, SerializeAndDeserialize) { + ErrorChunk chunk(Parameters::Builder() + .Add(UnrecognizedChunkTypeCause({1, 2, 3, 4})) + .Build()); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(ErrorChunk deserialized, + ErrorChunk::Parse(serialized)); + ASSERT_HAS_VALUE_AND_ASSIGN( + UnrecognizedChunkTypeCause cause, + deserialized.error_causes().get<UnrecognizedChunkTypeCause>()); + + EXPECT_THAT(cause.unrecognized_chunk(), ElementsAre(1, 2, 3, 4)); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_chunk.cc new file mode 100644 index 0000000000..e432114c50 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_chunk.cc @@ -0,0 +1,95 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/forward_tsn_chunk.h" + +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <utility> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/chunk/forward_tsn_common.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc3758#section-3.2 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 192 | Flags = 0x00 | Length = Variable | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | New Cumulative TSN | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Stream-1 | Stream Sequence-1 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// \ / +// / \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Stream-N | Stream Sequence-N | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int ForwardTsnChunk::kType; + +absl::optional<ForwardTsnChunk> ForwardTsnChunk::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + TSN new_cumulative_tsn(reader->Load32<4>()); + + size_t streams_skipped = + reader->variable_data_size() / kSkippedStreamBufferSize; + + std::vector<SkippedStream> skipped_streams; + skipped_streams.reserve(streams_skipped); + for (size_t i = 0; i < streams_skipped; ++i) { + BoundedByteReader<kSkippedStreamBufferSize> sub_reader = + reader->sub_reader<kSkippedStreamBufferSize>(i * + kSkippedStreamBufferSize); + + StreamID stream_id(sub_reader.Load16<0>()); + SSN ssn(sub_reader.Load16<2>()); + skipped_streams.emplace_back(stream_id, ssn); + } + return ForwardTsnChunk(new_cumulative_tsn, std::move(skipped_streams)); +} + +void ForwardTsnChunk::SerializeTo(std::vector<uint8_t>& out) const { + rtc::ArrayView<const SkippedStream> skipped = skipped_streams(); + size_t variable_size = skipped.size() * kSkippedStreamBufferSize; + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, variable_size); + + writer.Store32<4>(*new_cumulative_tsn()); + for (size_t i = 0; i < skipped.size(); ++i) { + BoundedByteWriter<kSkippedStreamBufferSize> sub_writer = + writer.sub_writer<kSkippedStreamBufferSize>(i * + kSkippedStreamBufferSize); + sub_writer.Store16<0>(*skipped[i].stream_id); + sub_writer.Store16<2>(*skipped[i].ssn); + } +} + +std::string ForwardTsnChunk::ToString() const { + rtc::StringBuilder sb; + sb << "FORWARD-TSN, new_cumulative_tsn=" << *new_cumulative_tsn(); + for (const auto& skipped : skipped_streams()) { + sb << ", skip " << skipped.stream_id.value() << ":" << *skipped.ssn; + } + return sb.str(); +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_chunk.h new file mode 100644 index 0000000000..b9ef666f41 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_chunk.h @@ -0,0 +1,55 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_FORWARD_TSN_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_FORWARD_TSN_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/chunk/forward_tsn_common.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc3758#section-3.2 +struct ForwardTsnChunkConfig : ChunkConfig { + static constexpr int kType = 192; + static constexpr size_t kHeaderSize = 8; + static constexpr size_t kVariableLengthAlignment = 4; +}; + +class ForwardTsnChunk : public AnyForwardTsnChunk, + public TLVTrait<ForwardTsnChunkConfig> { + public: + static constexpr int kType = ForwardTsnChunkConfig::kType; + + ForwardTsnChunk(TSN new_cumulative_tsn, + std::vector<SkippedStream> skipped_streams) + : AnyForwardTsnChunk(new_cumulative_tsn, std::move(skipped_streams)) {} + + static absl::optional<ForwardTsnChunk> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + private: + static constexpr size_t kSkippedStreamBufferSize = 4; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_FORWARD_TSN_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_chunk_test.cc new file mode 100644 index 0000000000..51f97f2396 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_chunk_test.cc @@ -0,0 +1,64 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/forward_tsn_chunk.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/forward_tsn_common.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(ForwardTsnChunkTest, FromCapture) { + /* + FORWARD_TSN chunk(Cumulative TSN: 1905748778) + Chunk type: FORWARD_TSN (192) + Chunk flags: 0x00 + Chunk length: 8 + New cumulative TSN: 1905748778 + */ + + uint8_t data[] = {0xc0, 0x00, 0x00, 0x08, 0x71, 0x97, 0x6b, 0x2a}; + + ASSERT_HAS_VALUE_AND_ASSIGN(ForwardTsnChunk chunk, + ForwardTsnChunk::Parse(data)); + EXPECT_EQ(*chunk.new_cumulative_tsn(), 1905748778u); +} + +TEST(ForwardTsnChunkTest, SerializeAndDeserialize) { + ForwardTsnChunk chunk( + TSN(123), {ForwardTsnChunk::SkippedStream(StreamID(1), SSN(23)), + ForwardTsnChunk::SkippedStream(StreamID(42), SSN(99))}); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(ForwardTsnChunk deserialized, + ForwardTsnChunk::Parse(serialized)); + EXPECT_EQ(*deserialized.new_cumulative_tsn(), 123u); + EXPECT_THAT( + deserialized.skipped_streams(), + ElementsAre(ForwardTsnChunk::SkippedStream(StreamID(1), SSN(23)), + ForwardTsnChunk::SkippedStream(StreamID(42), SSN(99)))); + + EXPECT_EQ(deserialized.ToString(), + "FORWARD-TSN, new_cumulative_tsn=123, skip 1:23, skip 42:99"); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_common.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_common.h new file mode 100644 index 0000000000..37bd2aafff --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/forward_tsn_common.h @@ -0,0 +1,66 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_FORWARD_TSN_COMMON_H_ +#define NET_DCSCTP_PACKET_CHUNK_FORWARD_TSN_COMMON_H_ +#include <stdint.h> + +#include <utility> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" + +namespace dcsctp { + +// Base class for both ForwardTsnChunk and IForwardTsnChunk +class AnyForwardTsnChunk : public Chunk { + public: + struct SkippedStream { + SkippedStream(StreamID stream_id, SSN ssn) + : stream_id(stream_id), ssn(ssn), unordered(false), message_id(0) {} + SkippedStream(IsUnordered unordered, StreamID stream_id, MID message_id) + : stream_id(stream_id), + ssn(0), + unordered(unordered), + message_id(message_id) {} + + StreamID stream_id; + + // Set for FORWARD_TSN + SSN ssn; + + // Set for I-FORWARD_TSN + IsUnordered unordered; + MID message_id; + + bool operator==(const SkippedStream& other) const { + return stream_id == other.stream_id && ssn == other.ssn && + unordered == other.unordered && message_id == other.message_id; + } + }; + + AnyForwardTsnChunk(TSN new_cumulative_tsn, + std::vector<SkippedStream> skipped_streams) + : new_cumulative_tsn_(new_cumulative_tsn), + skipped_streams_(std::move(skipped_streams)) {} + + TSN new_cumulative_tsn() const { return new_cumulative_tsn_; } + + rtc::ArrayView<const SkippedStream> skipped_streams() const { + return skipped_streams_; + } + + private: + TSN new_cumulative_tsn_; + std::vector<SkippedStream> skipped_streams_; +}; +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_FORWARD_TSN_COMMON_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_ack_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_ack_chunk.cc new file mode 100644 index 0000000000..3cbcd09c75 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_ack_chunk.cc @@ -0,0 +1,63 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/heartbeat_ack_chunk.h" + +#include <stdint.h> + +#include <utility> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.6 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 5 | Chunk Flags | Heartbeat Ack Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// \ \ +// / Heartbeat Information TLV (Variable-Length) / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int HeartbeatAckChunk::kType; + +absl::optional<HeartbeatAckChunk> HeartbeatAckChunk::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + absl::optional<Parameters> parameters = + Parameters::Parse(reader->variable_data()); + if (!parameters.has_value()) { + return absl::nullopt; + } + return HeartbeatAckChunk(*std::move(parameters)); +} + +void HeartbeatAckChunk::SerializeTo(std::vector<uint8_t>& out) const { + rtc::ArrayView<const uint8_t> parameters = parameters_.data(); + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, parameters.size()); + writer.CopyToVariableData(parameters); +} + +std::string HeartbeatAckChunk::ToString() const { + return "HEARTBEAT-ACK"; +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_ack_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_ack_chunk.h new file mode 100644 index 0000000000..a6479f78b0 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_ack_chunk.h @@ -0,0 +1,63 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_HEARTBEAT_ACK_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_HEARTBEAT_ACK_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/parameter/heartbeat_info_parameter.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.6 +struct HeartbeatAckChunkConfig : ChunkConfig { + static constexpr int kType = 5; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class HeartbeatAckChunk : public Chunk, + public TLVTrait<HeartbeatAckChunkConfig> { + public: + static constexpr int kType = HeartbeatAckChunkConfig::kType; + + explicit HeartbeatAckChunk(Parameters parameters) + : parameters_(std::move(parameters)) {} + + HeartbeatAckChunk(HeartbeatAckChunk&& other) = default; + HeartbeatAckChunk& operator=(HeartbeatAckChunk&& other) = default; + + static absl::optional<HeartbeatAckChunk> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + const Parameters& parameters() const { return parameters_; } + + absl::optional<HeartbeatInfoParameter> info() const { + return parameters_.get<HeartbeatInfoParameter>(); + } + + private: + Parameters parameters_; +}; +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_HEARTBEAT_ACK_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_ack_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_ack_chunk_test.cc new file mode 100644 index 0000000000..e4d0dd1489 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_ack_chunk_test.cc @@ -0,0 +1,79 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/heartbeat_ack_chunk.h" + +#include <stdint.h> + +#include <utility> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/packet/parameter/heartbeat_info_parameter.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(HeartbeatAckChunkTest, FromCapture) { + /* + HEARTBEAT_ACK chunk (Information: 40 bytes) + Chunk type: HEARTBEAT_ACK (5) + Chunk flags: 0x00 + Chunk length: 44 + Heartbeat info parameter (Information: 36 bytes) + Parameter type: Heartbeat info (0x0001) + Parameter length: 40 + Heartbeat information: ad2436603726070000000000000000007b1000000100… + */ + + uint8_t data[] = {0x05, 0x00, 0x00, 0x2c, 0x00, 0x01, 0x00, 0x28, 0xad, + 0x24, 0x36, 0x60, 0x37, 0x26, 0x07, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7b, 0x10, 0x00, + 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; + + ASSERT_HAS_VALUE_AND_ASSIGN(HeartbeatAckChunk chunk, + HeartbeatAckChunk::Parse(data)); + + ASSERT_HAS_VALUE_AND_ASSIGN(HeartbeatInfoParameter info, chunk.info()); + + EXPECT_THAT( + info.info(), + ElementsAre(0xad, 0x24, 0x36, 0x60, 0x37, 0x26, 0x07, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7b, 0x10, 0x00, 0x00, + 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)); +} + +TEST(HeartbeatAckChunkTest, SerializeAndDeserialize) { + uint8_t info_data[] = {1, 2, 3, 4}; + Parameters parameters = + Parameters::Builder().Add(HeartbeatInfoParameter(info_data)).Build(); + HeartbeatAckChunk chunk(std::move(parameters)); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(HeartbeatAckChunk deserialized, + HeartbeatAckChunk::Parse(serialized)); + + ASSERT_HAS_VALUE_AND_ASSIGN(HeartbeatInfoParameter info, deserialized.info()); + + EXPECT_THAT(info.info(), ElementsAre(1, 2, 3, 4)); + + EXPECT_EQ(deserialized.ToString(), "HEARTBEAT-ACK"); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_request_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_request_chunk.cc new file mode 100644 index 0000000000..d759d6b16d --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_request_chunk.cc @@ -0,0 +1,64 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/heartbeat_request_chunk.h" + +#include <stdint.h> + +#include <utility> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.5 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 4 | Chunk Flags | Heartbeat Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// \ \ +// / Heartbeat Information TLV (Variable-Length) / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int HeartbeatRequestChunk::kType; + +absl::optional<HeartbeatRequestChunk> HeartbeatRequestChunk::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + absl::optional<Parameters> parameters = + Parameters::Parse(reader->variable_data()); + if (!parameters.has_value()) { + return absl::nullopt; + } + return HeartbeatRequestChunk(*std::move(parameters)); +} + +void HeartbeatRequestChunk::SerializeTo(std::vector<uint8_t>& out) const { + rtc::ArrayView<const uint8_t> parameters = parameters_.data(); + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, parameters.size()); + writer.CopyToVariableData(parameters); +} + +std::string HeartbeatRequestChunk::ToString() const { + return "HEARTBEAT"; +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_request_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_request_chunk.h new file mode 100644 index 0000000000..fe2ce19504 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_request_chunk.h @@ -0,0 +1,62 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_HEARTBEAT_REQUEST_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_HEARTBEAT_REQUEST_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/parameter/heartbeat_info_parameter.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { +// https://tools.ietf.org/html/rfc4960#section-3.3.5 +struct HeartbeatRequestChunkConfig : ChunkConfig { + static constexpr int kType = 4; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class HeartbeatRequestChunk : public Chunk, + public TLVTrait<HeartbeatRequestChunkConfig> { + public: + static constexpr int kType = HeartbeatRequestChunkConfig::kType; + + explicit HeartbeatRequestChunk(Parameters parameters) + : parameters_(std::move(parameters)) {} + + HeartbeatRequestChunk(HeartbeatRequestChunk&& other) = default; + HeartbeatRequestChunk& operator=(HeartbeatRequestChunk&& other) = default; + + static absl::optional<HeartbeatRequestChunk> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + const Parameters& parameters() const { return parameters_; } + Parameters extract_parameters() && { return std::move(parameters_); } + absl::optional<HeartbeatInfoParameter> info() const { + return parameters_.get<HeartbeatInfoParameter>(); + } + + private: + Parameters parameters_; +}; +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_HEARTBEAT_REQUEST_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_request_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_request_chunk_test.cc new file mode 100644 index 0000000000..94911fe28b --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/heartbeat_request_chunk_test.cc @@ -0,0 +1,79 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/heartbeat_request_chunk.h" + +#include <stdint.h> + +#include <utility> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/packet/parameter/heartbeat_info_parameter.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(HeartbeatRequestChunkTest, FromCapture) { + /* + HEARTBEAT chunk (Information: 40 bytes) + Chunk type: HEARTBEAT (4) + Chunk flags: 0x00 + Chunk length: 44 + Heartbeat info parameter (Information: 36 bytes) + Parameter type: Heartbeat info (0x0001) + Parameter length: 40 + Heartbeat information: ad2436603726070000000000000000007b10000001… + */ + + uint8_t data[] = {0x04, 0x00, 0x00, 0x2c, 0x00, 0x01, 0x00, 0x28, 0xad, + 0x24, 0x36, 0x60, 0x37, 0x26, 0x07, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7b, 0x10, 0x00, + 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; + + ASSERT_HAS_VALUE_AND_ASSIGN(HeartbeatRequestChunk chunk, + HeartbeatRequestChunk::Parse(data)); + + ASSERT_HAS_VALUE_AND_ASSIGN(HeartbeatInfoParameter info, chunk.info()); + + EXPECT_THAT( + info.info(), + ElementsAre(0xad, 0x24, 0x36, 0x60, 0x37, 0x26, 0x07, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7b, 0x10, 0x00, 0x00, + 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)); +} + +TEST(HeartbeatRequestChunkTest, SerializeAndDeserialize) { + uint8_t info_data[] = {1, 2, 3, 4}; + Parameters parameters = + Parameters::Builder().Add(HeartbeatInfoParameter(info_data)).Build(); + HeartbeatRequestChunk chunk(std::move(parameters)); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(HeartbeatRequestChunk deserialized, + HeartbeatRequestChunk::Parse(serialized)); + + ASSERT_HAS_VALUE_AND_ASSIGN(HeartbeatInfoParameter info, deserialized.info()); + + EXPECT_THAT(info.info(), ElementsAre(1, 2, 3, 4)); + + EXPECT_EQ(deserialized.ToString(), "HEARTBEAT"); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/idata_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/idata_chunk.cc new file mode 100644 index 0000000000..378c527909 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/idata_chunk.cc @@ -0,0 +1,111 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/idata_chunk.h" + +#include <stdint.h> + +#include <string> +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/chunk/data_common.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc8260#section-2.1 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 64 | Res |I|U|B|E| Length = Variable | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | TSN | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Stream Identifier | Reserved | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Message Identifier | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Payload Protocol Identifier / Fragment Sequence Number | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// \ \ +// / User Data / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int IDataChunk::kType; + +absl::optional<IDataChunk> IDataChunk::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + uint8_t flags = reader->Load8<1>(); + TSN tsn(reader->Load32<4>()); + StreamID stream_identifier(reader->Load16<8>()); + MID message_id(reader->Load32<12>()); + uint32_t ppid_or_fsn = reader->Load32<16>(); + + Options options; + options.is_end = Data::IsEnd((flags & (1 << kFlagsBitEnd)) != 0); + options.is_beginning = + Data::IsBeginning((flags & (1 << kFlagsBitBeginning)) != 0); + options.is_unordered = IsUnordered((flags & (1 << kFlagsBitUnordered)) != 0); + options.immediate_ack = + ImmediateAckFlag((flags & (1 << kFlagsBitImmediateAck)) != 0); + + return IDataChunk(tsn, stream_identifier, message_id, + PPID(options.is_beginning ? ppid_or_fsn : 0), + FSN(options.is_beginning ? 0 : ppid_or_fsn), + std::vector<uint8_t>(reader->variable_data().begin(), + reader->variable_data().end()), + options); +} + +void IDataChunk::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, payload().size()); + + writer.Store8<1>( + (*options().is_end ? (1 << kFlagsBitEnd) : 0) | + (*options().is_beginning ? (1 << kFlagsBitBeginning) : 0) | + (*options().is_unordered ? (1 << kFlagsBitUnordered) : 0) | + (*options().immediate_ack ? (1 << kFlagsBitImmediateAck) : 0)); + writer.Store32<4>(*tsn()); + writer.Store16<8>(*stream_id()); + writer.Store32<12>(*message_id()); + writer.Store32<16>(options().is_beginning ? *ppid() : *fsn()); + writer.CopyToVariableData(payload()); +} + +std::string IDataChunk::ToString() const { + rtc::StringBuilder sb; + sb << "I-DATA, type=" << (options().is_unordered ? "unordered" : "ordered") + << "::" + << (*options().is_beginning && *options().is_end + ? "complete" + : *options().is_beginning ? "first" + : *options().is_end ? "last" : "middle") + << ", tsn=" << *tsn() << ", stream_id=" << *stream_id() + << ", message_id=" << *message_id(); + + if (*options().is_beginning) { + sb << ", ppid=" << *ppid(); + } else { + sb << ", fsn=" << *fsn(); + } + sb << ", length=" << payload().size(); + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/idata_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/idata_chunk.h new file mode 100644 index 0000000000..8cdf2a1fc4 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/idata_chunk.h @@ -0,0 +1,70 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_IDATA_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_IDATA_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <cstdint> +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/chunk/data_common.h" +#include "net/dcsctp/packet/data.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc8260#section-2.1 +struct IDataChunkConfig : ChunkConfig { + static constexpr int kType = 64; + static constexpr size_t kHeaderSize = 20; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class IDataChunk : public AnyDataChunk, public TLVTrait<IDataChunkConfig> { + public: + static constexpr int kType = IDataChunkConfig::kType; + + // Exposed to allow the retransmission queue to make room for the correct + // header size. + static constexpr size_t kHeaderSize = IDataChunkConfig::kHeaderSize; + IDataChunk(TSN tsn, + StreamID stream_id, + MID message_id, + PPID ppid, + FSN fsn, + std::vector<uint8_t> payload, + const Options& options) + : AnyDataChunk(tsn, + stream_id, + SSN(0), + message_id, + fsn, + ppid, + std::move(payload), + options) {} + + explicit IDataChunk(TSN tsn, Data&& data, bool immediate_ack) + : AnyDataChunk(tsn, std::move(data), immediate_ack) {} + + static absl::optional<IDataChunk> Parse(rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_IDATA_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/idata_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/idata_chunk_test.cc new file mode 100644 index 0000000000..fea492d71e --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/idata_chunk_test.cc @@ -0,0 +1,123 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/idata_chunk.h" + +#include <cstdint> +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(IDataChunkTest, AtBeginningFromCapture) { + /* + I_DATA chunk(ordered, first segment, TSN: 2487901653, SID: 1, MID: 0, + payload length: 1180 bytes) + Chunk type: I_DATA (64) + Chunk flags: 0x02 + Chunk length: 1200 + Transmission sequence number: 2487901653 + Stream identifier: 0x0001 + Reserved: 0 + Message identifier: 0 + Payload protocol identifier: WebRTC Binary (53) + Reassembled Message in frame: 39 + */ + + uint8_t data[] = {0x40, 0x02, 0x00, 0x15, 0x94, 0x4a, 0x5d, 0xd5, + 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x35, 0x01, 0x00, 0x00, 0x00}; + + ASSERT_HAS_VALUE_AND_ASSIGN(IDataChunk chunk, IDataChunk::Parse(data)); + EXPECT_EQ(*chunk.tsn(), 2487901653); + EXPECT_EQ(*chunk.stream_id(), 1); + EXPECT_EQ(*chunk.message_id(), 0u); + EXPECT_EQ(*chunk.ppid(), 53u); + EXPECT_EQ(*chunk.fsn(), 0u); // Not provided (so set to zero) +} + +TEST(IDataChunkTest, AtBeginningSerializeAndDeserialize) { + IDataChunk::Options options; + options.is_beginning = Data::IsBeginning(true); + IDataChunk chunk(TSN(123), StreamID(456), MID(789), PPID(53), FSN(0), {1}, + options); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(IDataChunk deserialized, + IDataChunk::Parse(serialized)); + EXPECT_EQ(*deserialized.tsn(), 123u); + EXPECT_EQ(*deserialized.stream_id(), 456u); + EXPECT_EQ(*deserialized.message_id(), 789u); + EXPECT_EQ(*deserialized.ppid(), 53u); + EXPECT_EQ(*deserialized.fsn(), 0u); + + EXPECT_EQ(deserialized.ToString(), + "I-DATA, type=ordered::first, tsn=123, stream_id=456, " + "message_id=789, ppid=53, length=1"); +} + +TEST(IDataChunkTest, InMiddleFromCapture) { + /* + I_DATA chunk(ordered, last segment, TSN: 2487901706, SID: 3, MID: 1, + FSN: 8, payload length: 560 bytes) + Chunk type: I_DATA (64) + Chunk flags: 0x01 + Chunk length: 580 + Transmission sequence number: 2487901706 + Stream identifier: 0x0003 + Reserved: 0 + Message identifier: 1 + Fragment sequence number: 8 + Reassembled SCTP Fragments (10000 bytes, 9 fragments): + */ + + uint8_t data[] = {0x40, 0x01, 0x00, 0x15, 0x94, 0x4a, 0x5e, 0x0a, + 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, + 0x00, 0x00, 0x00, 0x08, 0x01, 0x00, 0x00, 0x00}; + + ASSERT_HAS_VALUE_AND_ASSIGN(IDataChunk chunk, IDataChunk::Parse(data)); + EXPECT_EQ(*chunk.tsn(), 2487901706); + EXPECT_EQ(*chunk.stream_id(), 3u); + EXPECT_EQ(*chunk.message_id(), 1u); + EXPECT_EQ(*chunk.ppid(), 0u); // Not provided (so set to zero) + EXPECT_EQ(*chunk.fsn(), 8u); +} + +TEST(IDataChunkTest, InMiddleSerializeAndDeserialize) { + IDataChunk chunk(TSN(123), StreamID(456), MID(789), PPID(0), FSN(101112), + {1, 2, 3}, /*options=*/{}); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(IDataChunk deserialized, + IDataChunk::Parse(serialized)); + EXPECT_EQ(*deserialized.tsn(), 123u); + EXPECT_EQ(*deserialized.stream_id(), 456u); + EXPECT_EQ(*deserialized.message_id(), 789u); + EXPECT_EQ(*deserialized.ppid(), 0u); + EXPECT_EQ(*deserialized.fsn(), 101112u); + EXPECT_THAT(deserialized.payload(), ElementsAre(1, 2, 3)); + + EXPECT_EQ(deserialized.ToString(), + "I-DATA, type=ordered::middle, tsn=123, stream_id=456, " + "message_id=789, fsn=101112, length=3"); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/iforward_tsn_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/iforward_tsn_chunk.cc new file mode 100644 index 0000000000..a647a8bf8a --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/iforward_tsn_chunk.cc @@ -0,0 +1,104 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/iforward_tsn_chunk.h" + +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <utility> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/chunk/forward_tsn_common.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc8260#section-2.3.1 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 194 | Flags = 0x00 | Length = Variable | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | New Cumulative TSN | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Stream Identifier | Reserved |U| +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Message Identifier | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// \ \ +// / / +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Stream Identifier | Reserved |U| +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Message Identifier | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int IForwardTsnChunk::kType; + +absl::optional<IForwardTsnChunk> IForwardTsnChunk::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + TSN new_cumulative_tsn(reader->Load32<4>()); + + size_t streams_skipped = + reader->variable_data_size() / kSkippedStreamBufferSize; + std::vector<SkippedStream> skipped_streams; + skipped_streams.reserve(streams_skipped); + size_t offset = 0; + for (size_t i = 0; i < streams_skipped; ++i) { + BoundedByteReader<kSkippedStreamBufferSize> sub_reader = + reader->sub_reader<kSkippedStreamBufferSize>(offset); + + StreamID stream_id(sub_reader.Load16<0>()); + IsUnordered unordered(sub_reader.Load8<3>() & 0x01); + MID message_id(sub_reader.Load32<4>()); + skipped_streams.emplace_back(unordered, stream_id, message_id); + offset += kSkippedStreamBufferSize; + } + RTC_DCHECK(offset == reader->variable_data_size()); + return IForwardTsnChunk(new_cumulative_tsn, std::move(skipped_streams)); +} + +void IForwardTsnChunk::SerializeTo(std::vector<uint8_t>& out) const { + rtc::ArrayView<const SkippedStream> skipped = skipped_streams(); + size_t variable_size = skipped.size() * kSkippedStreamBufferSize; + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, variable_size); + + writer.Store32<4>(*new_cumulative_tsn()); + size_t offset = 0; + for (size_t i = 0; i < skipped.size(); ++i) { + BoundedByteWriter<kSkippedStreamBufferSize> sub_writer = + writer.sub_writer<kSkippedStreamBufferSize>(offset); + + sub_writer.Store16<0>(*skipped[i].stream_id); + sub_writer.Store8<3>(skipped[i].unordered ? 1 : 0); + sub_writer.Store32<4>(*skipped[i].message_id); + offset += kSkippedStreamBufferSize; + } + RTC_DCHECK(offset == variable_size); +} + +std::string IForwardTsnChunk::ToString() const { + rtc::StringBuilder sb; + sb << "I-FORWARD-TSN, new_cumulative_tsn=" << *new_cumulative_tsn(); + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/iforward_tsn_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/iforward_tsn_chunk.h new file mode 100644 index 0000000000..54d23f7a83 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/iforward_tsn_chunk.h @@ -0,0 +1,54 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_IFORWARD_TSN_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_IFORWARD_TSN_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/chunk/forward_tsn_common.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc8260#section-2.3.1 +struct IForwardTsnChunkConfig : ChunkConfig { + static constexpr int kType = 194; + static constexpr size_t kHeaderSize = 8; + static constexpr size_t kVariableLengthAlignment = 8; +}; + +class IForwardTsnChunk : public AnyForwardTsnChunk, + public TLVTrait<IForwardTsnChunkConfig> { + public: + static constexpr int kType = IForwardTsnChunkConfig::kType; + + IForwardTsnChunk(TSN new_cumulative_tsn, + std::vector<SkippedStream> skipped_streams) + : AnyForwardTsnChunk(new_cumulative_tsn, std::move(skipped_streams)) {} + + static absl::optional<IForwardTsnChunk> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + private: + static constexpr size_t kSkippedStreamBufferSize = 8; +}; +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_IFORWARD_TSN_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/iforward_tsn_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/iforward_tsn_chunk_test.cc new file mode 100644 index 0000000000..6a89433be1 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/iforward_tsn_chunk_test.cc @@ -0,0 +1,73 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/iforward_tsn_chunk.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/forward_tsn_common.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(IForwardTsnChunkTest, FromCapture) { + /* + I_FORWARD_TSN chunk(Cumulative TSN: 3094631148) + Chunk type: I_FORWARD_TSN (194) + Chunk flags: 0x00 + Chunk length: 16 + New cumulative TSN: 3094631148 + Stream identifier: 1 + Flags: 0x0000 + Message identifier: 2 + */ + + uint8_t data[] = {0xc2, 0x00, 0x00, 0x10, 0xb8, 0x74, 0x52, 0xec, + 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}; + + ASSERT_HAS_VALUE_AND_ASSIGN(IForwardTsnChunk chunk, + IForwardTsnChunk::Parse(data)); + EXPECT_EQ(*chunk.new_cumulative_tsn(), 3094631148u); + EXPECT_THAT(chunk.skipped_streams(), + ElementsAre(IForwardTsnChunk::SkippedStream( + IsUnordered(false), StreamID(1), MID(2)))); +} + +TEST(IForwardTsnChunkTest, SerializeAndDeserialize) { + IForwardTsnChunk chunk( + TSN(123), {IForwardTsnChunk::SkippedStream(IsUnordered(false), + StreamID(1), MID(23)), + IForwardTsnChunk::SkippedStream(IsUnordered(true), + StreamID(42), MID(99))}); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(IForwardTsnChunk deserialized, + IForwardTsnChunk::Parse(serialized)); + EXPECT_EQ(*deserialized.new_cumulative_tsn(), 123u); + EXPECT_THAT(deserialized.skipped_streams(), + ElementsAre(IForwardTsnChunk::SkippedStream(IsUnordered(false), + StreamID(1), MID(23)), + IForwardTsnChunk::SkippedStream( + IsUnordered(true), StreamID(42), MID(99)))); + + EXPECT_EQ(deserialized.ToString(), "I-FORWARD-TSN, new_cumulative_tsn=123"); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/init_ack_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/init_ack_chunk.cc new file mode 100644 index 0000000000..c7ef9da1f1 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/init_ack_chunk.cc @@ -0,0 +1,86 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/init_ack_chunk.h" + +#include <stdint.h> + +#include <string> +#include <utility> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_format.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.3 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 2 | Chunk Flags | Chunk Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Initiate Tag | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Advertised Receiver Window Credit | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Number of Outbound Streams | Number of Inbound Streams | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Initial TSN | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// \ \ +// / Optional/Variable-Length Parameters / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int InitAckChunk::kType; + +absl::optional<InitAckChunk> InitAckChunk::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + VerificationTag initiate_tag(reader->Load32<4>()); + uint32_t a_rwnd = reader->Load32<8>(); + uint16_t nbr_outbound_streams = reader->Load16<12>(); + uint16_t nbr_inbound_streams = reader->Load16<14>(); + TSN initial_tsn(reader->Load32<16>()); + absl::optional<Parameters> parameters = + Parameters::Parse(reader->variable_data()); + if (!parameters.has_value()) { + return absl::nullopt; + } + return InitAckChunk(initiate_tag, a_rwnd, nbr_outbound_streams, + nbr_inbound_streams, initial_tsn, *std::move(parameters)); +} + +void InitAckChunk::SerializeTo(std::vector<uint8_t>& out) const { + rtc::ArrayView<const uint8_t> parameters = parameters_.data(); + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, parameters.size()); + + writer.Store32<4>(*initiate_tag_); + writer.Store32<8>(a_rwnd_); + writer.Store16<12>(nbr_outbound_streams_); + writer.Store16<14>(nbr_inbound_streams_); + writer.Store32<16>(*initial_tsn_); + writer.CopyToVariableData(parameters); +} + +std::string InitAckChunk::ToString() const { + return rtc::StringFormat("INIT_ACK, initiate_tag=0x%0x, initial_tsn=%u", + *initiate_tag(), *initial_tsn()); +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/init_ack_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/init_ack_chunk.h new file mode 100644 index 0000000000..6fcf64b2eb --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/init_ack_chunk.h @@ -0,0 +1,77 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_INIT_ACK_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_INIT_ACK_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.3 +struct InitAckChunkConfig : ChunkConfig { + static constexpr int kType = 2; + static constexpr size_t kHeaderSize = 20; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class InitAckChunk : public Chunk, public TLVTrait<InitAckChunkConfig> { + public: + static constexpr int kType = InitAckChunkConfig::kType; + + InitAckChunk(VerificationTag initiate_tag, + uint32_t a_rwnd, + uint16_t nbr_outbound_streams, + uint16_t nbr_inbound_streams, + TSN initial_tsn, + Parameters parameters) + : initiate_tag_(initiate_tag), + a_rwnd_(a_rwnd), + nbr_outbound_streams_(nbr_outbound_streams), + nbr_inbound_streams_(nbr_inbound_streams), + initial_tsn_(initial_tsn), + parameters_(std::move(parameters)) {} + + InitAckChunk(InitAckChunk&& other) = default; + InitAckChunk& operator=(InitAckChunk&& other) = default; + + static absl::optional<InitAckChunk> Parse(rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + VerificationTag initiate_tag() const { return initiate_tag_; } + uint32_t a_rwnd() const { return a_rwnd_; } + uint16_t nbr_outbound_streams() const { return nbr_outbound_streams_; } + uint16_t nbr_inbound_streams() const { return nbr_inbound_streams_; } + TSN initial_tsn() const { return initial_tsn_; } + const Parameters& parameters() const { return parameters_; } + + private: + VerificationTag initiate_tag_; + uint32_t a_rwnd_; + uint16_t nbr_outbound_streams_; + uint16_t nbr_inbound_streams_; + TSN initial_tsn_; + Parameters parameters_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_INIT_ACK_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/init_ack_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/init_ack_chunk_test.cc new file mode 100644 index 0000000000..184ade747d --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/init_ack_chunk_test.cc @@ -0,0 +1,127 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/init_ack_chunk.h" + +#include <stdint.h> + +#include <utility> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/packet/parameter/forward_tsn_supported_parameter.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/parameter/state_cookie_parameter.h" +#include "net/dcsctp/packet/parameter/supported_extensions_parameter.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(InitAckChunkTest, FromCapture) { + /* + INIT_ACK chunk (Outbound streams: 1000, inbound streams: 2048) + Chunk type: INIT_ACK (2) + Chunk flags: 0x00 + Chunk length: 292 + Initiate tag: 0x579c2f98 + Advertised receiver window credit (a_rwnd): 131072 + Number of outbound streams: 1000 + Number of inbound streams: 2048 + Initial TSN: 1670811335 + Forward TSN supported parameter + Parameter type: Forward TSN supported (0xc000) + Parameter length: 4 + Supported Extensions parameter (Supported types: FORWARD_TSN, RE_CONFIG) + Parameter type: Supported Extensions (0x8008) + Parameter length: 6 + Supported chunk type: FORWARD_TSN (192) + Supported chunk type: RE_CONFIG (130) + Parameter padding: 0000 + State cookie parameter (Cookie length: 256 bytes) + Parameter type: State cookie (0x0007) + Parameter length: 260 + State cookie: 4b414d452d42534420312e310000000096b8386000000000… + */ + + uint8_t data[] = { + 0x02, 0x00, 0x01, 0x24, 0x57, 0x9c, 0x2f, 0x98, 0x00, 0x02, 0x00, 0x00, + 0x03, 0xe8, 0x08, 0x00, 0x63, 0x96, 0x8e, 0xc7, 0xc0, 0x00, 0x00, 0x04, + 0x80, 0x08, 0x00, 0x06, 0xc0, 0x82, 0x00, 0x00, 0x00, 0x07, 0x01, 0x04, + 0x4b, 0x41, 0x4d, 0x45, 0x2d, 0x42, 0x53, 0x44, 0x20, 0x31, 0x2e, 0x31, + 0x00, 0x00, 0x00, 0x00, 0x96, 0xb8, 0x38, 0x60, 0x00, 0x00, 0x00, 0x00, + 0x52, 0x5a, 0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x60, 0xea, 0x00, 0x00, + 0xb5, 0xaa, 0x19, 0xea, 0x31, 0xef, 0xa4, 0x2b, 0x90, 0x16, 0x7a, 0xde, + 0x57, 0x9c, 0x2f, 0x98, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x13, 0x88, 0x13, 0x88, 0x00, 0x00, 0x01, 0x00, 0x01, 0x01, 0x01, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x5a, 0xde, 0x7a, 0x16, 0x90, + 0x00, 0x02, 0x00, 0x00, 0x03, 0xe8, 0x03, 0xe8, 0x25, 0x0d, 0x37, 0xe8, + 0x80, 0x00, 0x00, 0x04, 0xc0, 0x00, 0x00, 0x04, 0x80, 0x08, 0x00, 0x09, + 0xc0, 0x0f, 0xc1, 0x80, 0x82, 0x00, 0x00, 0x00, 0x80, 0x02, 0x00, 0x24, + 0xab, 0x31, 0x44, 0x62, 0x12, 0x1a, 0x15, 0x13, 0xfd, 0x5a, 0x5f, 0x69, + 0xef, 0xaa, 0x06, 0xe9, 0xab, 0xd7, 0x48, 0xcc, 0x3b, 0xd1, 0x4b, 0x60, + 0xed, 0x7f, 0xa6, 0x44, 0xce, 0x4d, 0xd2, 0xad, 0x80, 0x04, 0x00, 0x06, + 0x00, 0x01, 0x00, 0x00, 0x80, 0x03, 0x00, 0x06, 0x80, 0xc1, 0x00, 0x00, + 0x02, 0x00, 0x01, 0x24, 0x57, 0x9c, 0x2f, 0x98, 0x00, 0x02, 0x00, 0x00, + 0x03, 0xe8, 0x08, 0x00, 0x63, 0x96, 0x8e, 0xc7, 0xc0, 0x00, 0x00, 0x04, + 0x80, 0x08, 0x00, 0x06, 0xc0, 0x82, 0x00, 0x00, 0x51, 0x95, 0x01, 0x88, + 0x0d, 0x80, 0x7b, 0x19, 0xe7, 0xf9, 0xc6, 0x18, 0x5c, 0x4a, 0xbf, 0x39, + 0x32, 0xe5, 0x63, 0x8e}; + + ASSERT_HAS_VALUE_AND_ASSIGN(InitAckChunk chunk, InitAckChunk::Parse(data)); + + EXPECT_EQ(chunk.initiate_tag(), VerificationTag(0x579c2f98u)); + EXPECT_EQ(chunk.a_rwnd(), 131072u); + EXPECT_EQ(chunk.nbr_outbound_streams(), 1000u); + EXPECT_EQ(chunk.nbr_inbound_streams(), 2048u); + EXPECT_EQ(chunk.initial_tsn(), TSN(1670811335u)); + EXPECT_TRUE( + chunk.parameters().get<ForwardTsnSupportedParameter>().has_value()); + EXPECT_TRUE( + chunk.parameters().get<SupportedExtensionsParameter>().has_value()); + EXPECT_TRUE(chunk.parameters().get<StateCookieParameter>().has_value()); +} + +TEST(InitAckChunkTest, SerializeAndDeserialize) { + uint8_t state_cookie[] = {1, 2, 3, 4, 5}; + Parameters parameters = + Parameters::Builder().Add(StateCookieParameter(state_cookie)).Build(); + InitAckChunk chunk(VerificationTag(123), /*a_rwnd=*/456, + /*nbr_outbound_streams=*/65535, + /*nbr_inbound_streams=*/65534, /*initial_tsn=*/TSN(789), + /*parameters=*/std::move(parameters)); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(InitAckChunk deserialized, + InitAckChunk::Parse(serialized)); + + EXPECT_EQ(chunk.initiate_tag(), VerificationTag(123u)); + EXPECT_EQ(chunk.a_rwnd(), 456u); + EXPECT_EQ(chunk.nbr_outbound_streams(), 65535u); + EXPECT_EQ(chunk.nbr_inbound_streams(), 65534u); + EXPECT_EQ(chunk.initial_tsn(), TSN(789u)); + + ASSERT_HAS_VALUE_AND_ASSIGN( + StateCookieParameter cookie, + deserialized.parameters().get<StateCookieParameter>()); + EXPECT_THAT(cookie.data(), ElementsAre(1, 2, 3, 4, 5)); + EXPECT_EQ(deserialized.ToString(), + "INIT_ACK, initiate_tag=0x7b, initial_tsn=789"); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/init_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/init_chunk.cc new file mode 100644 index 0000000000..8030107072 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/init_chunk.cc @@ -0,0 +1,88 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/init_chunk.h" + +#include <stdint.h> + +#include <string> +#include <utility> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_format.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.2 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 1 | Chunk Flags | Chunk Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Initiate Tag | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Advertised Receiver Window Credit (a_rwnd) | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Number of Outbound Streams | Number of Inbound Streams | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Initial TSN | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// \ \ +// / Optional/Variable-Length Parameters / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int InitChunk::kType; + +absl::optional<InitChunk> InitChunk::Parse(rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + VerificationTag initiate_tag(reader->Load32<4>()); + uint32_t a_rwnd = reader->Load32<8>(); + uint16_t nbr_outbound_streams = reader->Load16<12>(); + uint16_t nbr_inbound_streams = reader->Load16<14>(); + TSN initial_tsn(reader->Load32<16>()); + + absl::optional<Parameters> parameters = + Parameters::Parse(reader->variable_data()); + if (!parameters.has_value()) { + return absl::nullopt; + } + return InitChunk(initiate_tag, a_rwnd, nbr_outbound_streams, + nbr_inbound_streams, initial_tsn, *std::move(parameters)); +} + +void InitChunk::SerializeTo(std::vector<uint8_t>& out) const { + rtc::ArrayView<const uint8_t> parameters = parameters_.data(); + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, parameters.size()); + + writer.Store32<4>(*initiate_tag_); + writer.Store32<8>(a_rwnd_); + writer.Store16<12>(nbr_outbound_streams_); + writer.Store16<14>(nbr_inbound_streams_); + writer.Store32<16>(*initial_tsn_); + + writer.CopyToVariableData(parameters); +} + +std::string InitChunk::ToString() const { + return rtc::StringFormat("INIT, initiate_tag=0x%0x, initial_tsn=%u", + *initiate_tag(), *initial_tsn()); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/init_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/init_chunk.h new file mode 100644 index 0000000000..38f9994caa --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/init_chunk.h @@ -0,0 +1,77 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_INIT_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_INIT_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.2 +struct InitChunkConfig : ChunkConfig { + static constexpr int kType = 1; + static constexpr size_t kHeaderSize = 20; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class InitChunk : public Chunk, public TLVTrait<InitChunkConfig> { + public: + static constexpr int kType = InitChunkConfig::kType; + + InitChunk(VerificationTag initiate_tag, + uint32_t a_rwnd, + uint16_t nbr_outbound_streams, + uint16_t nbr_inbound_streams, + TSN initial_tsn, + Parameters parameters) + : initiate_tag_(initiate_tag), + a_rwnd_(a_rwnd), + nbr_outbound_streams_(nbr_outbound_streams), + nbr_inbound_streams_(nbr_inbound_streams), + initial_tsn_(initial_tsn), + parameters_(std::move(parameters)) {} + + InitChunk(InitChunk&& other) = default; + InitChunk& operator=(InitChunk&& other) = default; + + static absl::optional<InitChunk> Parse(rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + VerificationTag initiate_tag() const { return initiate_tag_; } + uint32_t a_rwnd() const { return a_rwnd_; } + uint16_t nbr_outbound_streams() const { return nbr_outbound_streams_; } + uint16_t nbr_inbound_streams() const { return nbr_inbound_streams_; } + TSN initial_tsn() const { return initial_tsn_; } + const Parameters& parameters() const { return parameters_; } + + private: + VerificationTag initiate_tag_; + uint32_t a_rwnd_; + uint16_t nbr_outbound_streams_; + uint16_t nbr_inbound_streams_; + TSN initial_tsn_; + Parameters parameters_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_INIT_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/init_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/init_chunk_test.cc new file mode 100644 index 0000000000..bd36d6fdf8 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/init_chunk_test.cc @@ -0,0 +1,113 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/init_chunk.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "net/dcsctp/packet/parameter/forward_tsn_supported_parameter.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/parameter/supported_extensions_parameter.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { + +TEST(InitChunkTest, FromCapture) { + /* + INIT chunk (Outbound streams: 1000, inbound streams: 1000) + Chunk type: INIT (1) + Chunk flags: 0x00 + Chunk length: 90 + Initiate tag: 0xde7a1690 + Advertised receiver window credit (a_rwnd): 131072 + Number of outbound streams: 1000 + Number of inbound streams: 1000 + Initial TSN: 621623272 + ECN parameter + Parameter type: ECN (0x8000) + Parameter length: 4 + Forward TSN supported parameter + Parameter type: Forward TSN supported (0xc000) + Parameter length: 4 + Supported Extensions parameter (Supported types: FORWARD_TSN, AUTH, + ASCONF, ASCONF_ACK, RE_CONFIG) Parameter type: Supported Extensions (0x8008) + Parameter length: 9 + Supported chunk type: FORWARD_TSN (192) + Supported chunk type: AUTH (15) + Supported chunk type: ASCONF (193) + Supported chunk type: ASCONF_ACK (128) + Supported chunk type: RE_CONFIG (130) + Parameter padding: 000000 + Random parameter + Parameter type: Random (0x8002) + Parameter length: 36 + Random number: ab314462121a1513fd5a5f69efaa06e9abd748cc3bd14b60… + Requested HMAC Algorithm parameter (Supported HMACs: SHA-1) + Parameter type: Requested HMAC Algorithm (0x8004) + Parameter length: 6 + HMAC identifier: SHA-1 (1) + Parameter padding: 0000 + Authenticated Chunk list parameter (Chunk types to be authenticated: + ASCONF_ACK, ASCONF) Parameter type: Authenticated Chunk list (0x8003) + Parameter length: 6 + Chunk type: ASCONF_ACK (128) + Chunk type: ASCONF (193) + */ + + uint8_t data[] = { + 0x01, 0x00, 0x00, 0x5a, 0xde, 0x7a, 0x16, 0x90, 0x00, 0x02, 0x00, 0x00, + 0x03, 0xe8, 0x03, 0xe8, 0x25, 0x0d, 0x37, 0xe8, 0x80, 0x00, 0x00, 0x04, + 0xc0, 0x00, 0x00, 0x04, 0x80, 0x08, 0x00, 0x09, 0xc0, 0x0f, 0xc1, 0x80, + 0x82, 0x00, 0x00, 0x00, 0x80, 0x02, 0x00, 0x24, 0xab, 0x31, 0x44, 0x62, + 0x12, 0x1a, 0x15, 0x13, 0xfd, 0x5a, 0x5f, 0x69, 0xef, 0xaa, 0x06, 0xe9, + 0xab, 0xd7, 0x48, 0xcc, 0x3b, 0xd1, 0x4b, 0x60, 0xed, 0x7f, 0xa6, 0x44, + 0xce, 0x4d, 0xd2, 0xad, 0x80, 0x04, 0x00, 0x06, 0x00, 0x01, 0x00, 0x00, + 0x80, 0x03, 0x00, 0x06, 0x80, 0xc1, 0x00, 0x00}; + + ASSERT_HAS_VALUE_AND_ASSIGN(InitChunk chunk, InitChunk::Parse(data)); + + EXPECT_EQ(chunk.initiate_tag(), VerificationTag(0xde7a1690)); + EXPECT_EQ(chunk.a_rwnd(), 131072u); + EXPECT_EQ(chunk.nbr_outbound_streams(), 1000u); + EXPECT_EQ(chunk.nbr_inbound_streams(), 1000u); + EXPECT_EQ(chunk.initial_tsn(), TSN(621623272u)); + EXPECT_TRUE( + chunk.parameters().get<ForwardTsnSupportedParameter>().has_value()); + EXPECT_TRUE( + chunk.parameters().get<SupportedExtensionsParameter>().has_value()); +} + +TEST(InitChunkTest, SerializeAndDeserialize) { + InitChunk chunk(VerificationTag(123), /*a_rwnd=*/456, + /*nbr_outbound_streams=*/65535, + /*nbr_inbound_streams=*/65534, /*initial_tsn=*/TSN(789), + /*parameters=*/Parameters::Builder().Build()); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(InitChunk deserialized, + InitChunk::Parse(serialized)); + + EXPECT_EQ(deserialized.initiate_tag(), VerificationTag(123u)); + EXPECT_EQ(deserialized.a_rwnd(), 456u); + EXPECT_EQ(deserialized.nbr_outbound_streams(), 65535u); + EXPECT_EQ(deserialized.nbr_inbound_streams(), 65534u); + EXPECT_EQ(deserialized.initial_tsn(), TSN(789u)); + EXPECT_EQ(deserialized.ToString(), + "INIT, initiate_tag=0x7b, initial_tsn=789"); +} +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/reconfig_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/reconfig_chunk.cc new file mode 100644 index 0000000000..f39f3b619f --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/reconfig_chunk.cc @@ -0,0 +1,69 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/reconfig_chunk.h" + +#include <stdint.h> + +#include <utility> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc6525#section-3.1 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 130 | Chunk Flags | Chunk Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// \ \ +// / Re-configuration Parameter / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// \ \ +// / Re-configuration Parameter (optional) / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int ReConfigChunk::kType; + +absl::optional<ReConfigChunk> ReConfigChunk::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + absl::optional<Parameters> parameters = + Parameters::Parse(reader->variable_data()); + if (!parameters.has_value()) { + return absl::nullopt; + } + + return ReConfigChunk(*std::move(parameters)); +} + +void ReConfigChunk::SerializeTo(std::vector<uint8_t>& out) const { + rtc::ArrayView<const uint8_t> parameters = parameters_.data(); + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, parameters.size()); + writer.CopyToVariableData(parameters); +} + +std::string ReConfigChunk::ToString() const { + return "RE-CONFIG"; +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/reconfig_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/reconfig_chunk.h new file mode 100644 index 0000000000..9d2539a515 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/reconfig_chunk.h @@ -0,0 +1,56 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_RECONFIG_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_RECONFIG_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc6525#section-3.1 +struct ReConfigChunkConfig : ChunkConfig { + static constexpr int kType = 130; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class ReConfigChunk : public Chunk, public TLVTrait<ReConfigChunkConfig> { + public: + static constexpr int kType = ReConfigChunkConfig::kType; + + explicit ReConfigChunk(Parameters parameters) + : parameters_(std::move(parameters)) {} + + static absl::optional<ReConfigChunk> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + const Parameters& parameters() const { return parameters_; } + Parameters extract_parameters() { return std::move(parameters_); } + + private: + Parameters parameters_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_RECONFIG_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/reconfig_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/reconfig_chunk_test.cc new file mode 100644 index 0000000000..dbf40ff8c0 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/reconfig_chunk_test.cc @@ -0,0 +1,94 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/reconfig_chunk.h" + +#include <cstdint> +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/packet/parameter/outgoing_ssn_reset_request_parameter.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; +using ::testing::SizeIs; + +TEST(ReConfigChunkTest, FromCapture) { + /* + RE_CONFIG chunk + Chunk type: RE_CONFIG (130) + Chunk flags: 0x00 + Chunk length: 22 + Outgoing SSN reset request parameter + Parameter type: Outgoing SSN reset request (0x000d) + Parameter length: 18 + Re-configuration request sequence number: 2270550051 + Re-configuration response sequence number: 1905748638 + Senders last assigned TSN: 2270550066 + Stream Identifier: 6 + Chunk padding: 0000 + */ + + uint8_t data[] = {0x82, 0x00, 0x00, 0x16, 0x00, 0x0d, 0x00, 0x12, + 0x87, 0x55, 0xd8, 0x23, 0x71, 0x97, 0x6a, 0x9e, + 0x87, 0x55, 0xd8, 0x32, 0x00, 0x06, 0x00, 0x00}; + + ASSERT_HAS_VALUE_AND_ASSIGN(ReConfigChunk chunk, ReConfigChunk::Parse(data)); + + const Parameters& parameters = chunk.parameters(); + EXPECT_THAT(parameters.descriptors(), SizeIs(1)); + ParameterDescriptor desc = parameters.descriptors()[0]; + ASSERT_EQ(desc.type, OutgoingSSNResetRequestParameter::kType); + ASSERT_HAS_VALUE_AND_ASSIGN( + OutgoingSSNResetRequestParameter req, + OutgoingSSNResetRequestParameter::Parse(desc.data)); + EXPECT_EQ(*req.request_sequence_number(), 2270550051u); + EXPECT_EQ(*req.response_sequence_number(), 1905748638u); + EXPECT_EQ(*req.sender_last_assigned_tsn(), 2270550066u); + EXPECT_THAT(req.stream_ids(), ElementsAre(StreamID(6))); +} + +TEST(ReConfigChunkTest, SerializeAndDeserialize) { + Parameters::Builder params_builder = + Parameters::Builder().Add(OutgoingSSNResetRequestParameter( + ReconfigRequestSN(123), ReconfigRequestSN(456), TSN(789), + {StreamID(42), StreamID(43)})); + + ReConfigChunk chunk(params_builder.Build()); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(ReConfigChunk deserialized, + ReConfigChunk::Parse(serialized)); + + const Parameters& parameters = deserialized.parameters(); + EXPECT_THAT(parameters.descriptors(), SizeIs(1)); + ParameterDescriptor desc = parameters.descriptors()[0]; + ASSERT_EQ(desc.type, OutgoingSSNResetRequestParameter::kType); + ASSERT_HAS_VALUE_AND_ASSIGN( + OutgoingSSNResetRequestParameter req, + OutgoingSSNResetRequestParameter::Parse(desc.data)); + EXPECT_EQ(*req.request_sequence_number(), 123u); + EXPECT_EQ(*req.response_sequence_number(), 456u); + EXPECT_EQ(*req.sender_last_assigned_tsn(), 789u); + EXPECT_THAT(req.stream_ids(), ElementsAre(StreamID(42), StreamID(43))); + + EXPECT_EQ(deserialized.ToString(), "RE-CONFIG"); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/sack_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/sack_chunk.cc new file mode 100644 index 0000000000..d80e430082 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/sack_chunk.cc @@ -0,0 +1,155 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/sack_chunk.h" + +#include <stddef.h> + +#include <cstdint> +#include <string> +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/common/str_join.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/logging.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.4 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 3 |Chunk Flags | Chunk Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cumulative TSN Ack | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Advertised Receiver Window Credit (a_rwnd) | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Number of Gap Ack Blocks = N | Number of Duplicate TSNs = X | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Gap Ack Block #1 Start | Gap Ack Block #1 End | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// / / +// \ ... \ +// / / +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Gap Ack Block #N Start | Gap Ack Block #N End | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Duplicate TSN 1 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// / / +// \ ... \ +// / / +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Duplicate TSN X | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int SackChunk::kType; + +absl::optional<SackChunk> SackChunk::Parse(rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + TSN tsn_ack(reader->Load32<4>()); + uint32_t a_rwnd = reader->Load32<8>(); + uint16_t nbr_of_gap_blocks = reader->Load16<12>(); + uint16_t nbr_of_dup_tsns = reader->Load16<14>(); + + if (reader->variable_data_size() != nbr_of_gap_blocks * kGapAckBlockSize + + nbr_of_dup_tsns * kDupTsnBlockSize) { + RTC_DLOG(LS_WARNING) << "Invalid number of gap blocks or duplicate TSNs"; + return absl::nullopt; + } + + std::vector<GapAckBlock> gap_ack_blocks; + gap_ack_blocks.reserve(nbr_of_gap_blocks); + size_t offset = 0; + for (int i = 0; i < nbr_of_gap_blocks; ++i) { + BoundedByteReader<kGapAckBlockSize> sub_reader = + reader->sub_reader<kGapAckBlockSize>(offset); + + uint16_t start = sub_reader.Load16<0>(); + uint16_t end = sub_reader.Load16<2>(); + gap_ack_blocks.emplace_back(start, end); + offset += kGapAckBlockSize; + } + + std::set<TSN> duplicate_tsns; + for (int i = 0; i < nbr_of_dup_tsns; ++i) { + BoundedByteReader<kDupTsnBlockSize> sub_reader = + reader->sub_reader<kDupTsnBlockSize>(offset); + + duplicate_tsns.insert(TSN(sub_reader.Load32<0>())); + offset += kDupTsnBlockSize; + } + RTC_DCHECK(offset == reader->variable_data_size()); + + return SackChunk(tsn_ack, a_rwnd, gap_ack_blocks, duplicate_tsns); +} + +void SackChunk::SerializeTo(std::vector<uint8_t>& out) const { + int nbr_of_gap_blocks = gap_ack_blocks_.size(); + int nbr_of_dup_tsns = duplicate_tsns_.size(); + size_t variable_size = + nbr_of_gap_blocks * kGapAckBlockSize + nbr_of_dup_tsns * kDupTsnBlockSize; + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, variable_size); + + writer.Store32<4>(*cumulative_tsn_ack_); + writer.Store32<8>(a_rwnd_); + writer.Store16<12>(nbr_of_gap_blocks); + writer.Store16<14>(nbr_of_dup_tsns); + + size_t offset = 0; + for (int i = 0; i < nbr_of_gap_blocks; ++i) { + BoundedByteWriter<kGapAckBlockSize> sub_writer = + writer.sub_writer<kGapAckBlockSize>(offset); + + sub_writer.Store16<0>(gap_ack_blocks_[i].start); + sub_writer.Store16<2>(gap_ack_blocks_[i].end); + offset += kGapAckBlockSize; + } + + for (TSN tsn : duplicate_tsns_) { + BoundedByteWriter<kDupTsnBlockSize> sub_writer = + writer.sub_writer<kDupTsnBlockSize>(offset); + + sub_writer.Store32<0>(*tsn); + offset += kDupTsnBlockSize; + } + + RTC_DCHECK(offset == variable_size); +} + +std::string SackChunk::ToString() const { + rtc::StringBuilder sb; + sb << "SACK, cum_ack_tsn=" << *cumulative_tsn_ack() + << ", a_rwnd=" << a_rwnd(); + for (const GapAckBlock& gap : gap_ack_blocks_) { + uint32_t first = *cumulative_tsn_ack_ + gap.start; + uint32_t last = *cumulative_tsn_ack_ + gap.end; + sb << ", gap=" << first << "--" << last; + } + if (!duplicate_tsns_.empty()) { + sb << ", dup_tsns=" + << StrJoin(duplicate_tsns(), ",", + [](rtc::StringBuilder& sb, TSN tsn) { sb << *tsn; }); + } + + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/sack_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/sack_chunk.h new file mode 100644 index 0000000000..e6758fa332 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/sack_chunk.h @@ -0,0 +1,80 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_SACK_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_SACK_CHUNK_H_ +#include <stddef.h> + +#include <cstdint> +#include <set> +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.4 +struct SackChunkConfig : ChunkConfig { + static constexpr int kType = 3; + static constexpr size_t kHeaderSize = 16; + static constexpr size_t kVariableLengthAlignment = 4; +}; + +class SackChunk : public Chunk, public TLVTrait<SackChunkConfig> { + public: + static constexpr int kType = SackChunkConfig::kType; + + struct GapAckBlock { + GapAckBlock(uint16_t start, uint16_t end) : start(start), end(end) {} + + uint16_t start; + uint16_t end; + + bool operator==(const GapAckBlock& other) const { + return start == other.start && end == other.end; + } + }; + + SackChunk(TSN cumulative_tsn_ack, + uint32_t a_rwnd, + std::vector<GapAckBlock> gap_ack_blocks, + std::set<TSN> duplicate_tsns) + : cumulative_tsn_ack_(cumulative_tsn_ack), + a_rwnd_(a_rwnd), + gap_ack_blocks_(std::move(gap_ack_blocks)), + duplicate_tsns_(std::move(duplicate_tsns)) {} + static absl::optional<SackChunk> Parse(rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + TSN cumulative_tsn_ack() const { return cumulative_tsn_ack_; } + uint32_t a_rwnd() const { return a_rwnd_; } + rtc::ArrayView<const GapAckBlock> gap_ack_blocks() const { + return gap_ack_blocks_; + } + const std::set<TSN>& duplicate_tsns() const { return duplicate_tsns_; } + + private: + static constexpr size_t kGapAckBlockSize = 4; + static constexpr size_t kDupTsnBlockSize = 4; + + const TSN cumulative_tsn_ack_; + const uint32_t a_rwnd_; + std::vector<GapAckBlock> gap_ack_blocks_; + std::set<TSN> duplicate_tsns_; +}; +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_SACK_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/sack_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/sack_chunk_test.cc new file mode 100644 index 0000000000..9122945308 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/sack_chunk_test.cc @@ -0,0 +1,84 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/sack_chunk.h" + +#include <cstdint> +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(SackChunkTest, FromCapture) { + /* + SACK chunk (Cumulative TSN: 916312075, a_rwnd: 126323, + gaps: 2, duplicate TSNs: 1) + Chunk type: SACK (3) + Chunk flags: 0x00 + Chunk length: 28 + Cumulative TSN ACK: 916312075 + Advertised receiver window credit (a_rwnd): 126323 + Number of gap acknowledgement blocks: 2 + Number of duplicated TSNs: 1 + Gap Acknowledgement for TSN 916312077 to 916312081 + Gap Acknowledgement for TSN 916312083 to 916312083 + [Number of TSNs in gap acknowledgement blocks: 6] + Duplicate TSN: 916312081 + + */ + + uint8_t data[] = {0x03, 0x00, 0x00, 0x1c, 0x36, 0x9d, 0xd0, 0x0b, 0x00, 0x01, + 0xed, 0x73, 0x00, 0x02, 0x00, 0x01, 0x00, 0x02, 0x00, 0x06, + 0x00, 0x08, 0x00, 0x08, 0x36, 0x9d, 0xd0, 0x11}; + + ASSERT_HAS_VALUE_AND_ASSIGN(SackChunk chunk, SackChunk::Parse(data)); + + TSN cum_ack_tsn(916312075); + EXPECT_EQ(chunk.cumulative_tsn_ack(), cum_ack_tsn); + EXPECT_EQ(chunk.a_rwnd(), 126323u); + EXPECT_THAT( + chunk.gap_ack_blocks(), + ElementsAre(SackChunk::GapAckBlock( + static_cast<uint16_t>(916312077 - *cum_ack_tsn), + static_cast<uint16_t>(916312081 - *cum_ack_tsn)), + SackChunk::GapAckBlock( + static_cast<uint16_t>(916312083 - *cum_ack_tsn), + static_cast<uint16_t>(916312083 - *cum_ack_tsn)))); + EXPECT_THAT(chunk.duplicate_tsns(), ElementsAre(TSN(916312081))); +} + +TEST(SackChunkTest, SerializeAndDeserialize) { + SackChunk chunk(TSN(123), /*a_rwnd=*/456, {SackChunk::GapAckBlock(2, 3)}, + {TSN(1), TSN(2), TSN(3)}); + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(SackChunk deserialized, + SackChunk::Parse(serialized)); + + EXPECT_EQ(*deserialized.cumulative_tsn_ack(), 123u); + EXPECT_EQ(deserialized.a_rwnd(), 456u); + EXPECT_THAT(deserialized.gap_ack_blocks(), + ElementsAre(SackChunk::GapAckBlock(2, 3))); + EXPECT_THAT(deserialized.duplicate_tsns(), + ElementsAre(TSN(1), TSN(2), TSN(3))); + + EXPECT_EQ(deserialized.ToString(), + "SACK, cum_ack_tsn=123, a_rwnd=456, gap=125--126, dup_tsns=1,2,3"); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_ack_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_ack_chunk.cc new file mode 100644 index 0000000000..d42aceead4 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_ack_chunk.cc @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/shutdown_ack_chunk.h" + +#include <stdint.h> + +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.9 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 8 |Chunk Flags | Length = 4 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int ShutdownAckChunk::kType; + +absl::optional<ShutdownAckChunk> ShutdownAckChunk::Parse( + rtc::ArrayView<const uint8_t> data) { + if (!ParseTLV(data).has_value()) { + return absl::nullopt; + } + return ShutdownAckChunk(); +} + +void ShutdownAckChunk::SerializeTo(std::vector<uint8_t>& out) const { + AllocateTLV(out); +} + +std::string ShutdownAckChunk::ToString() const { + return "SHUTDOWN-ACK"; +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_ack_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_ack_chunk.h new file mode 100644 index 0000000000..29c1a98be6 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_ack_chunk.h @@ -0,0 +1,47 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_SHUTDOWN_ACK_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_SHUTDOWN_ACK_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.9 +struct ShutdownAckChunkConfig : ChunkConfig { + static constexpr int kType = 8; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 0; +}; + +class ShutdownAckChunk : public Chunk, public TLVTrait<ShutdownAckChunkConfig> { + public: + static constexpr int kType = ShutdownAckChunkConfig::kType; + + ShutdownAckChunk() {} + + static absl::optional<ShutdownAckChunk> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_SHUTDOWN_ACK_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_ack_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_ack_chunk_test.cc new file mode 100644 index 0000000000..ef04ea9892 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_ack_chunk_test.cc @@ -0,0 +1,45 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/shutdown_ack_chunk.h" + +#include <stdint.h> + +#include <vector> + +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { + +TEST(ShutdownAckChunkTest, FromCapture) { + /* + SHUTDOWN_ACK chunk + Chunk type: SHUTDOWN_ACK (8) + Chunk flags: 0x00 + Chunk length: 4 + */ + + uint8_t data[] = {0x08, 0x00, 0x00, 0x04}; + + EXPECT_TRUE(ShutdownAckChunk::Parse(data).has_value()); +} + +TEST(ShutdownAckChunkTest, SerializeAndDeserialize) { + ShutdownAckChunk chunk; + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + EXPECT_TRUE(ShutdownAckChunk::Parse(serialized).has_value()); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk.cc new file mode 100644 index 0000000000..59f806f7f7 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk.cc @@ -0,0 +1,55 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/shutdown_chunk.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.8 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 7 | Chunk Flags | Length = 8 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cumulative TSN Ack | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int ShutdownChunk::kType; + +absl::optional<ShutdownChunk> ShutdownChunk::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + TSN cumulative_tsn_ack(reader->Load32<4>()); + return ShutdownChunk(cumulative_tsn_ack); +} + +void ShutdownChunk::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out); + writer.Store32<4>(*cumulative_tsn_ack_); +} + +std::string ShutdownChunk::ToString() const { + return "SHUTDOWN"; +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk.h new file mode 100644 index 0000000000..8148cca286 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk.h @@ -0,0 +1,53 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_SHUTDOWN_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_SHUTDOWN_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.8 +struct ShutdownChunkConfig : ChunkConfig { + static constexpr int kType = 7; + static constexpr size_t kHeaderSize = 8; + static constexpr size_t kVariableLengthAlignment = 0; +}; + +class ShutdownChunk : public Chunk, public TLVTrait<ShutdownChunkConfig> { + public: + static constexpr int kType = ShutdownChunkConfig::kType; + + explicit ShutdownChunk(TSN cumulative_tsn_ack) + : cumulative_tsn_ack_(cumulative_tsn_ack) {} + + static absl::optional<ShutdownChunk> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + TSN cumulative_tsn_ack() const { return cumulative_tsn_ack_; } + + private: + TSN cumulative_tsn_ack_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_SHUTDOWN_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk_test.cc new file mode 100644 index 0000000000..16d147ca83 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk_test.cc @@ -0,0 +1,50 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/shutdown_chunk.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" + +namespace dcsctp { +namespace { +TEST(ShutdownChunkTest, FromCapture) { + /* + SHUTDOWN chunk (Cumulative TSN ack: 101831101) + Chunk type: SHUTDOWN (7) + Chunk flags: 0x00 + Chunk length: 8 + Cumulative TSN Ack: 101831101 + */ + + uint8_t data[] = {0x07, 0x00, 0x00, 0x08, 0x06, 0x11, 0xd1, 0xbd}; + + ASSERT_HAS_VALUE_AND_ASSIGN(ShutdownChunk chunk, ShutdownChunk::Parse(data)); + EXPECT_EQ(chunk.cumulative_tsn_ack(), TSN(101831101u)); +} + +TEST(ShutdownChunkTest, SerializeAndDeserialize) { + ShutdownChunk chunk(TSN(12345678)); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(ShutdownChunk deserialized, + ShutdownChunk::Parse(serialized)); + + EXPECT_EQ(deserialized.cumulative_tsn_ack(), TSN(12345678u)); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_complete_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_complete_chunk.cc new file mode 100644 index 0000000000..3f54857437 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_complete_chunk.cc @@ -0,0 +1,54 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/shutdown_complete_chunk.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.13 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 14 |Reserved |T| Length = 4 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int ShutdownCompleteChunk::kType; + +absl::optional<ShutdownCompleteChunk> ShutdownCompleteChunk::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + uint8_t flags = reader->Load8<1>(); + bool tag_reflected = (flags & (1 << kFlagsBitT)) != 0; + return ShutdownCompleteChunk(tag_reflected); +} + +void ShutdownCompleteChunk::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out); + writer.Store8<1>(tag_reflected_ ? (1 << kFlagsBitT) : 0); +} + +std::string ShutdownCompleteChunk::ToString() const { + return "SHUTDOWN-COMPLETE"; +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_complete_chunk.h b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_complete_chunk.h new file mode 100644 index 0000000000..46d28e88dc --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_complete_chunk.h @@ -0,0 +1,54 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_SHUTDOWN_COMPLETE_CHUNK_H_ +#define NET_DCSCTP_PACKET_CHUNK_SHUTDOWN_COMPLETE_CHUNK_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.13 +struct ShutdownCompleteChunkConfig : ChunkConfig { + static constexpr int kType = 14; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 0; +}; + +class ShutdownCompleteChunk : public Chunk, + public TLVTrait<ShutdownCompleteChunkConfig> { + public: + static constexpr int kType = ShutdownCompleteChunkConfig::kType; + + explicit ShutdownCompleteChunk(bool tag_reflected) + : tag_reflected_(tag_reflected) {} + + static absl::optional<ShutdownCompleteChunk> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + bool tag_reflected() const { return tag_reflected_; } + + private: + static constexpr int kFlagsBitT = 0; + bool tag_reflected_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_SHUTDOWN_COMPLETE_CHUNK_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_complete_chunk_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_complete_chunk_test.cc new file mode 100644 index 0000000000..253900d5cd --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_complete_chunk_test.cc @@ -0,0 +1,45 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk/shutdown_complete_chunk.h" + +#include <stdint.h> + +#include <vector> + +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { + +TEST(ShutdownCompleteChunkTest, FromCapture) { + /* + SHUTDOWN_COMPLETE chunk + Chunk type: SHUTDOWN_COMPLETE (14) + Chunk flags: 0x00 + Chunk length: 4 + */ + + uint8_t data[] = {0x0e, 0x00, 0x00, 0x04}; + + EXPECT_TRUE(ShutdownCompleteChunk::Parse(data).has_value()); +} + +TEST(ShutdownCompleteChunkTest, SerializeAndDeserialize) { + ShutdownCompleteChunk chunk(/*tag_reflected=*/false); + + std::vector<uint8_t> serialized; + chunk.SerializeTo(serialized); + + EXPECT_TRUE(ShutdownCompleteChunk::Parse(serialized).has_value()); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk_validators.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk_validators.cc new file mode 100644 index 0000000000..48d351827e --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk_validators.cc @@ -0,0 +1,87 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk_validators.h" + +#include <algorithm> +#include <utility> +#include <vector> + +#include "net/dcsctp/packet/chunk/sack_chunk.h" +#include "rtc_base/logging.h" + +namespace dcsctp { + +SackChunk ChunkValidators::Clean(SackChunk&& sack) { + if (Validate(sack)) { + return std::move(sack); + } + + RTC_DLOG(LS_WARNING) << "Received SACK is malformed; cleaning it"; + + std::vector<SackChunk::GapAckBlock> gap_ack_blocks; + gap_ack_blocks.reserve(sack.gap_ack_blocks().size()); + + // First: Only keep blocks that are sane + for (const SackChunk::GapAckBlock& gap_ack_block : sack.gap_ack_blocks()) { + if (gap_ack_block.end > gap_ack_block.start) { + gap_ack_blocks.emplace_back(gap_ack_block); + } + } + + // Not more than at most one remaining? Exit early. + if (gap_ack_blocks.size() <= 1) { + return SackChunk(sack.cumulative_tsn_ack(), sack.a_rwnd(), + std::move(gap_ack_blocks), sack.duplicate_tsns()); + } + + // Sort the intervals by their start value, to aid in the merging below. + absl::c_sort(gap_ack_blocks, [&](const SackChunk::GapAckBlock& a, + const SackChunk::GapAckBlock& b) { + return a.start < b.start; + }); + + // Merge overlapping ranges. + std::vector<SackChunk::GapAckBlock> merged; + merged.reserve(gap_ack_blocks.size()); + merged.push_back(gap_ack_blocks[0]); + + for (size_t i = 1; i < gap_ack_blocks.size(); ++i) { + if (merged.back().end + 1 >= gap_ack_blocks[i].start) { + merged.back().end = std::max(merged.back().end, gap_ack_blocks[i].end); + } else { + merged.push_back(gap_ack_blocks[i]); + } + } + + return SackChunk(sack.cumulative_tsn_ack(), sack.a_rwnd(), std::move(merged), + sack.duplicate_tsns()); +} + +bool ChunkValidators::Validate(const SackChunk& sack) { + if (sack.gap_ack_blocks().empty()) { + return true; + } + + // Ensure that gap-ack-blocks are sorted, has an "end" that is not before + // "start" and are non-overlapping and non-adjacent. + uint16_t prev_end = 0; + for (const SackChunk::GapAckBlock& gap_ack_block : sack.gap_ack_blocks()) { + if (gap_ack_block.end < gap_ack_block.start) { + return false; + } + if (gap_ack_block.start <= (prev_end + 1)) { + return false; + } + prev_end = gap_ack_block.end; + } + return true; +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk_validators.h b/third_party/libwebrtc/net/dcsctp/packet/chunk_validators.h new file mode 100644 index 0000000000..b11848a162 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk_validators.h @@ -0,0 +1,33 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CHUNK_VALIDATORS_H_ +#define NET_DCSCTP_PACKET_CHUNK_VALIDATORS_H_ + +#include "net/dcsctp/packet/chunk/sack_chunk.h" + +namespace dcsctp { +// Validates and cleans SCTP chunks. +class ChunkValidators { + public: + // Given a SackChunk, will return `true` if it's valid, and `false` if not. + static bool Validate(const SackChunk& sack); + + // Given a SackChunk, it will return a cleaned and validated variant of it. + // RFC4960 doesn't say anything about validity of SACKs or if the Gap ACK + // blocks must be sorted, and non-overlapping. While they always are in + // well-behaving implementations, this can't be relied on. + // + // This method internally calls `Validate`, which means that you can always + // pass a SackChunk to this method (valid or not), and use the results. + static SackChunk Clean(SackChunk&& sack); +}; +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CHUNK_VALIDATORS_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk_validators_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk_validators_test.cc new file mode 100644 index 0000000000..d59fd4ec48 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk_validators_test.cc @@ -0,0 +1,161 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/chunk_validators.h" + +#include <utility> + +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; +using ::testing::IsEmpty; + +TEST(ChunkValidatorsTest, NoGapAckBlocksAreValid) { + SackChunk sack(TSN(123), /*a_rwnd=*/456, + /*gap_ack_blocks=*/{}, {}); + + EXPECT_TRUE(ChunkValidators::Validate(sack)); + + SackChunk clean = ChunkValidators::Clean(std::move(sack)); + EXPECT_THAT(clean.gap_ack_blocks(), IsEmpty()); +} + +TEST(ChunkValidatorsTest, OneValidAckBlock) { + SackChunk sack(TSN(123), /*a_rwnd=*/456, {SackChunk::GapAckBlock(2, 3)}, {}); + + EXPECT_TRUE(ChunkValidators::Validate(sack)); + + SackChunk clean = ChunkValidators::Clean(std::move(sack)); + EXPECT_THAT(clean.gap_ack_blocks(), + ElementsAre(SackChunk::GapAckBlock(2, 3))); +} + +TEST(ChunkValidatorsTest, TwoValidAckBlocks) { + SackChunk sack(TSN(123), /*a_rwnd=*/456, + {SackChunk::GapAckBlock(2, 3), SackChunk::GapAckBlock(5, 6)}, + {}); + + EXPECT_TRUE(ChunkValidators::Validate(sack)); + + SackChunk clean = ChunkValidators::Clean(std::move(sack)); + EXPECT_THAT( + clean.gap_ack_blocks(), + ElementsAre(SackChunk::GapAckBlock(2, 3), SackChunk::GapAckBlock(5, 6))); +} + +TEST(ChunkValidatorsTest, OneInvalidAckBlock) { + SackChunk sack(TSN(123), /*a_rwnd=*/456, {SackChunk::GapAckBlock(1, 2)}, {}); + + EXPECT_FALSE(ChunkValidators::Validate(sack)); + + // It's not strictly valid, but due to the renegable nature of gap ack blocks, + // the cum_ack_tsn can't simply be moved. + SackChunk clean = ChunkValidators::Clean(std::move(sack)); + EXPECT_THAT(clean.gap_ack_blocks(), + ElementsAre(SackChunk::GapAckBlock(1, 2))); +} + +TEST(ChunkValidatorsTest, RemovesInvalidGapAckBlockFromSack) { + SackChunk sack(TSN(123), /*a_rwnd=*/456, + {SackChunk::GapAckBlock(2, 3), SackChunk::GapAckBlock(6, 4)}, + {}); + + EXPECT_FALSE(ChunkValidators::Validate(sack)); + + SackChunk clean = ChunkValidators::Clean(std::move(sack)); + + EXPECT_THAT(clean.gap_ack_blocks(), + ElementsAre(SackChunk::GapAckBlock(2, 3))); +} + +TEST(ChunkValidatorsTest, SortsGapAckBlocksInOrder) { + SackChunk sack(TSN(123), /*a_rwnd=*/456, + {SackChunk::GapAckBlock(6, 7), SackChunk::GapAckBlock(3, 4)}, + {}); + + EXPECT_FALSE(ChunkValidators::Validate(sack)); + + SackChunk clean = ChunkValidators::Clean(std::move(sack)); + + EXPECT_THAT( + clean.gap_ack_blocks(), + ElementsAre(SackChunk::GapAckBlock(3, 4), SackChunk::GapAckBlock(6, 7))); +} + +TEST(ChunkValidatorsTest, MergesAdjacentBlocks) { + SackChunk sack(TSN(123), /*a_rwnd=*/456, + {SackChunk::GapAckBlock(3, 4), SackChunk::GapAckBlock(5, 6)}, + {}); + + EXPECT_FALSE(ChunkValidators::Validate(sack)); + + SackChunk clean = ChunkValidators::Clean(std::move(sack)); + + EXPECT_THAT(clean.gap_ack_blocks(), + ElementsAre(SackChunk::GapAckBlock(3, 6))); +} + +TEST(ChunkValidatorsTest, MergesOverlappingByOne) { + SackChunk sack(TSN(123), /*a_rwnd=*/456, + {SackChunk::GapAckBlock(3, 4), SackChunk::GapAckBlock(4, 5)}, + {}); + + SackChunk clean = ChunkValidators::Clean(std::move(sack)); + + EXPECT_FALSE(ChunkValidators::Validate(sack)); + + EXPECT_THAT(clean.gap_ack_blocks(), + ElementsAre(SackChunk::GapAckBlock(3, 5))); +} + +TEST(ChunkValidatorsTest, MergesOverlappingByMore) { + SackChunk sack(TSN(123), /*a_rwnd=*/456, + {SackChunk::GapAckBlock(3, 10), SackChunk::GapAckBlock(4, 5)}, + {}); + + EXPECT_FALSE(ChunkValidators::Validate(sack)); + + SackChunk clean = ChunkValidators::Clean(std::move(sack)); + + EXPECT_THAT(clean.gap_ack_blocks(), + ElementsAre(SackChunk::GapAckBlock(3, 10))); +} + +TEST(ChunkValidatorsTest, MergesBlocksStartingWithSameStartOffset) { + SackChunk sack(TSN(123), /*a_rwnd=*/456, + {SackChunk::GapAckBlock(3, 7), SackChunk::GapAckBlock(3, 5), + SackChunk::GapAckBlock(3, 9)}, + {}); + + EXPECT_FALSE(ChunkValidators::Validate(sack)); + + SackChunk clean = ChunkValidators::Clean(std::move(sack)); + + EXPECT_THAT(clean.gap_ack_blocks(), + ElementsAre(SackChunk::GapAckBlock(3, 9))); +} + +TEST(ChunkValidatorsTest, MergesBlocksPartiallyOverlapping) { + SackChunk sack(TSN(123), /*a_rwnd=*/456, + {SackChunk::GapAckBlock(3, 7), SackChunk::GapAckBlock(5, 9)}, + {}); + + EXPECT_FALSE(ChunkValidators::Validate(sack)); + + SackChunk clean = ChunkValidators::Clean(std::move(sack)); + + EXPECT_THAT(clean.gap_ack_blocks(), + ElementsAre(SackChunk::GapAckBlock(3, 9))); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/crc32c.cc b/third_party/libwebrtc/net/dcsctp/packet/crc32c.cc new file mode 100644 index 0000000000..e3f0dc1d19 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/crc32c.cc @@ -0,0 +1,29 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/crc32c.h" + +#include <cstdint> + +#include "third_party/crc32c/src/include/crc32c/crc32c.h" + +namespace dcsctp { + +uint32_t GenerateCrc32C(rtc::ArrayView<const uint8_t> data) { + uint32_t crc32c = crc32c_value(data.data(), data.size()); + + // Byte swapping for little endian byte order: + uint8_t byte0 = crc32c; + uint8_t byte1 = crc32c >> 8; + uint8_t byte2 = crc32c >> 16; + uint8_t byte3 = crc32c >> 24; + crc32c = ((byte0 << 24) | (byte1 << 16) | (byte2 << 8) | byte3); + return crc32c; +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/crc32c.h b/third_party/libwebrtc/net/dcsctp/packet/crc32c.h new file mode 100644 index 0000000000..a969e1b26b --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/crc32c.h @@ -0,0 +1,24 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_CRC32C_H_ +#define NET_DCSCTP_PACKET_CRC32C_H_ + +#include <cstdint> + +#include "api/array_view.h" + +namespace dcsctp { + +// Generates the CRC32C checksum of `data`. +uint32_t GenerateCrc32C(rtc::ArrayView<const uint8_t> data); + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_CRC32C_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/crc32c_test.cc b/third_party/libwebrtc/net/dcsctp/packet/crc32c_test.cc new file mode 100644 index 0000000000..0821c4ef75 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/crc32c_test.cc @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/crc32c.h" + +#include "test/gmock.h" + +namespace dcsctp { +namespace { + +constexpr std::array<const uint8_t, 0> kEmpty = {}; +constexpr std::array<const uint8_t, 1> kZero = {0}; +constexpr std::array<const uint8_t, 4> kManyZeros = {0, 0, 0, 0}; +constexpr std::array<const uint8_t, 4> kShort = {1, 2, 3, 4}; +constexpr std::array<const uint8_t, 8> kLong = {1, 2, 3, 4, 5, 6, 7, 8}; +// https://tools.ietf.org/html/rfc3720#appendix-B.4 +constexpr std::array<const uint8_t, 32> k32Zeros = { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; +constexpr std::array<const uint8_t, 32> k32Ones = { + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; +constexpr std::array<const uint8_t, 32> k32Incrementing = { + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}; +constexpr std::array<const uint8_t, 32> k32Decrementing = { + 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, + 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0}; +constexpr std::array<const uint8_t, 48> kISCSICommandPDU = { + 0x01, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, + 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x18, 0x28, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, +}; + +TEST(Crc32Test, TestVectors) { + EXPECT_EQ(GenerateCrc32C(kEmpty), 0U); + EXPECT_EQ(GenerateCrc32C(kZero), 0x51537d52U); + EXPECT_EQ(GenerateCrc32C(kManyZeros), 0xc74b6748U); + EXPECT_EQ(GenerateCrc32C(kShort), 0xf48c3029U); + EXPECT_EQ(GenerateCrc32C(kLong), 0x811f8946U); + // https://tools.ietf.org/html/rfc3720#appendix-B.4 + EXPECT_EQ(GenerateCrc32C(k32Zeros), 0xaa36918aU); + EXPECT_EQ(GenerateCrc32C(k32Ones), 0x43aba862U); + EXPECT_EQ(GenerateCrc32C(k32Incrementing), 0x4e79dd46U); + EXPECT_EQ(GenerateCrc32C(k32Decrementing), 0x5cdb3f11U); + EXPECT_EQ(GenerateCrc32C(kISCSICommandPDU), 0x563a96d9U); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/data.h b/third_party/libwebrtc/net/dcsctp/packet/data.h new file mode 100644 index 0000000000..c1754ed59a --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/data.h @@ -0,0 +1,103 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_DATA_H_ +#define NET_DCSCTP_PACKET_DATA_H_ + +#include <cstdint> +#include <utility> +#include <vector> + +#include "net/dcsctp/common/internal_types.h" +#include "net/dcsctp/public/types.h" + +namespace dcsctp { + +// Represents data that is either received and extracted from a DATA/I-DATA +// chunk, or data that is supposed to be sent, and wrapped in a DATA/I-DATA +// chunk (depending on peer capabilities). +// +// The data wrapped in this structure is actually the same as the DATA/I-DATA +// chunk (actually the union of them), but to avoid having all components be +// aware of the implementation details of the different chunks, this abstraction +// is used instead. A notable difference is also that it doesn't carry a +// Transmission Sequence Number (TSN), as that is not known when a chunk is +// created (assigned late, just when sending), and that the TSNs in DATA/I-DATA +// are wrapped numbers, and within the library, unwrapped sequence numbers are +// preferably used. +struct Data { + // Indicates if a chunk is the first in a fragmented message and maps to the + // "beginning" flag in DATA/I-DATA chunk. + using IsBeginning = webrtc::StrongAlias<class IsBeginningTag, bool>; + + // Indicates if a chunk is the last in a fragmented message and maps to the + // "end" flag in DATA/I-DATA chunk. + using IsEnd = webrtc::StrongAlias<class IsEndTag, bool>; + + Data(StreamID stream_id, + SSN ssn, + MID message_id, + FSN fsn, + PPID ppid, + std::vector<uint8_t> payload, + IsBeginning is_beginning, + IsEnd is_end, + IsUnordered is_unordered) + : stream_id(stream_id), + ssn(ssn), + message_id(message_id), + fsn(fsn), + ppid(ppid), + payload(std::move(payload)), + is_beginning(is_beginning), + is_end(is_end), + is_unordered(is_unordered) {} + + // Move-only, to avoid accidental copies. + Data(Data&& other) = default; + Data& operator=(Data&& other) = default; + + // Creates a copy of this `Data` object. + Data Clone() const { + return Data(stream_id, ssn, message_id, fsn, ppid, payload, is_beginning, + is_end, is_unordered); + } + + // The size of this data, which translates to the size of its payload. + size_t size() const { return payload.size(); } + + // Stream Identifier. + StreamID stream_id; + + // Stream Sequence Number (SSN), per stream, for ordered chunks. Defined by + // RFC4960 and used only in DATA chunks (not I-DATA). + SSN ssn; + + // Message Identifier (MID) per stream and ordered/unordered. Defined by + // RFC8260, and used together with options.is_unordered and stream_id to + // uniquely identify a message. Used only in I-DATA chunks (not DATA). + MID message_id; + // Fragment Sequence Number (FSN) per stream and ordered/unordered, as above. + FSN fsn; + + // Payload Protocol Identifier (PPID). + PPID ppid; + + // The actual data payload. + std::vector<uint8_t> payload; + + // If this data represents the first, last or a middle chunk. + IsBeginning is_beginning; + IsEnd is_end; + // If this data is sent/received unordered. + IsUnordered is_unordered; +}; +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_DATA_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/cookie_received_while_shutting_down_cause.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/cookie_received_while_shutting_down_cause.cc new file mode 100644 index 0000000000..ef67c2a49f --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/cookie_received_while_shutting_down_cause.cc @@ -0,0 +1,45 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/cookie_received_while_shutting_down_cause.h" + +#include <stdint.h> + +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.10 + +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cause Code=10 | Cause Length=4 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int CookieReceivedWhileShuttingDownCause::kType; + +absl::optional<CookieReceivedWhileShuttingDownCause> +CookieReceivedWhileShuttingDownCause::Parse( + rtc::ArrayView<const uint8_t> data) { + if (!ParseTLV(data).has_value()) { + return absl::nullopt; + } + return CookieReceivedWhileShuttingDownCause(); +} + +void CookieReceivedWhileShuttingDownCause::SerializeTo( + std::vector<uint8_t>& out) const { + AllocateTLV(out); +} + +std::string CookieReceivedWhileShuttingDownCause::ToString() const { + return "Cookie Received While Shutting Down"; +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/cookie_received_while_shutting_down_cause.h b/third_party/libwebrtc/net/dcsctp/packet/error_cause/cookie_received_while_shutting_down_cause.h new file mode 100644 index 0000000000..362f181fba --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/cookie_received_while_shutting_down_cause.h @@ -0,0 +1,50 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_ERROR_CAUSE_COOKIE_RECEIVED_WHILE_SHUTTING_DOWN_CAUSE_H_ +#define NET_DCSCTP_PACKET_ERROR_CAUSE_COOKIE_RECEIVED_WHILE_SHUTTING_DOWN_CAUSE_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.10 +struct CookieReceivedWhileShuttingDownCauseConfig : public ParameterConfig { + static constexpr int kType = 10; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 0; +}; + +class CookieReceivedWhileShuttingDownCause + : public Parameter, + public TLVTrait<CookieReceivedWhileShuttingDownCauseConfig> { + public: + static constexpr int kType = + CookieReceivedWhileShuttingDownCauseConfig::kType; + + CookieReceivedWhileShuttingDownCause() {} + + static absl::optional<CookieReceivedWhileShuttingDownCause> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_ERROR_CAUSE_COOKIE_RECEIVED_WHILE_SHUTTING_DOWN_CAUSE_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/cookie_received_while_shutting_down_cause_test.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/cookie_received_while_shutting_down_cause_test.cc new file mode 100644 index 0000000000..afb8364c32 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/cookie_received_while_shutting_down_cause_test.cc @@ -0,0 +1,35 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/cookie_received_while_shutting_down_cause.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" + +namespace dcsctp { +namespace { + +TEST(CookieReceivedWhileShuttingDownCauseTest, SerializeAndDeserialize) { + CookieReceivedWhileShuttingDownCause parameter; + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN( + CookieReceivedWhileShuttingDownCause deserialized, + CookieReceivedWhileShuttingDownCause::Parse(serialized)); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/error_cause.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/error_cause.cc new file mode 100644 index 0000000000..dcd07472ed --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/error_cause.cc @@ -0,0 +1,83 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/error_cause.h" + +#include <stddef.h> + +#include <cstdint> +#include <memory> +#include <string> +#include <utility> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/common/math.h" +#include "net/dcsctp/packet/error_cause/cookie_received_while_shutting_down_cause.h" +#include "net/dcsctp/packet/error_cause/invalid_mandatory_parameter_cause.h" +#include "net/dcsctp/packet/error_cause/invalid_stream_identifier_cause.h" +#include "net/dcsctp/packet/error_cause/missing_mandatory_parameter_cause.h" +#include "net/dcsctp/packet/error_cause/no_user_data_cause.h" +#include "net/dcsctp/packet/error_cause/out_of_resource_error_cause.h" +#include "net/dcsctp/packet/error_cause/protocol_violation_cause.h" +#include "net/dcsctp/packet/error_cause/restart_of_an_association_with_new_address_cause.h" +#include "net/dcsctp/packet/error_cause/stale_cookie_error_cause.h" +#include "net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause.h" +#include "net/dcsctp/packet/error_cause/unrecognized_parameter_cause.h" +#include "net/dcsctp/packet/error_cause/unresolvable_address_cause.h" +#include "net/dcsctp/packet/error_cause/user_initiated_abort_cause.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +template <class ErrorCause> +bool ParseAndPrint(ParameterDescriptor descriptor, rtc::StringBuilder& sb) { + if (descriptor.type == ErrorCause::kType) { + absl::optional<ErrorCause> p = ErrorCause::Parse(descriptor.data); + if (p.has_value()) { + sb << p->ToString(); + } else { + sb << "Failed to parse error cause of type " << ErrorCause::kType; + } + return true; + } + return false; +} + +std::string ErrorCausesToString(const Parameters& parameters) { + rtc::StringBuilder sb; + + std::vector<ParameterDescriptor> descriptors = parameters.descriptors(); + for (size_t i = 0; i < descriptors.size(); ++i) { + if (i > 0) { + sb << "\n"; + } + + const ParameterDescriptor& d = descriptors[i]; + if (!ParseAndPrint<InvalidStreamIdentifierCause>(d, sb) && + !ParseAndPrint<MissingMandatoryParameterCause>(d, sb) && + !ParseAndPrint<StaleCookieErrorCause>(d, sb) && + !ParseAndPrint<OutOfResourceErrorCause>(d, sb) && + !ParseAndPrint<UnresolvableAddressCause>(d, sb) && + !ParseAndPrint<UnrecognizedChunkTypeCause>(d, sb) && + !ParseAndPrint<InvalidMandatoryParameterCause>(d, sb) && + !ParseAndPrint<UnrecognizedParametersCause>(d, sb) && + !ParseAndPrint<NoUserDataCause>(d, sb) && + !ParseAndPrint<CookieReceivedWhileShuttingDownCause>(d, sb) && + !ParseAndPrint<RestartOfAnAssociationWithNewAddressesCause>(d, sb) && + !ParseAndPrint<UserInitiatedAbortCause>(d, sb) && + !ParseAndPrint<ProtocolViolationCause>(d, sb)) { + sb << "Unhandled parameter of type: " << d.type; + } + } + + return sb.Release(); +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/error_cause.h b/third_party/libwebrtc/net/dcsctp/packet/error_cause/error_cause.h new file mode 100644 index 0000000000..fa2bf81478 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/error_cause.h @@ -0,0 +1,38 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_ERROR_CAUSE_ERROR_CAUSE_H_ +#define NET_DCSCTP_PACKET_ERROR_CAUSE_ERROR_CAUSE_H_ + +#include <stddef.h> + +#include <cstdint> +#include <iosfwd> +#include <memory> +#include <string> +#include <type_traits> +#include <utility> +#include <vector> + +#include "absl/algorithm/container.h" +#include "absl/strings/string_view.h" +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// Converts the Error Causes in `parameters` to a human readable string, +// to be used in error reporting and logging. +std::string ErrorCausesToString(const Parameters& parameters); + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_ERROR_CAUSE_ERROR_CAUSE_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_mandatory_parameter_cause.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_mandatory_parameter_cause.cc new file mode 100644 index 0000000000..0187544226 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_mandatory_parameter_cause.cc @@ -0,0 +1,45 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/invalid_mandatory_parameter_cause.h" + +#include <stdint.h> + +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.7 + +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cause Code=7 | Cause Length=4 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int InvalidMandatoryParameterCause::kType; + +absl::optional<InvalidMandatoryParameterCause> +InvalidMandatoryParameterCause::Parse(rtc::ArrayView<const uint8_t> data) { + if (!ParseTLV(data).has_value()) { + return absl::nullopt; + } + return InvalidMandatoryParameterCause(); +} + +void InvalidMandatoryParameterCause::SerializeTo( + std::vector<uint8_t>& out) const { + AllocateTLV(out); +} + +std::string InvalidMandatoryParameterCause::ToString() const { + return "Invalid Mandatory Parameter"; +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_mandatory_parameter_cause.h b/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_mandatory_parameter_cause.h new file mode 100644 index 0000000000..e192b5a42f --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_mandatory_parameter_cause.h @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_ERROR_CAUSE_INVALID_MANDATORY_PARAMETER_CAUSE_H_ +#define NET_DCSCTP_PACKET_ERROR_CAUSE_INVALID_MANDATORY_PARAMETER_CAUSE_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.7 +struct InvalidMandatoryParameterCauseConfig : public ParameterConfig { + static constexpr int kType = 7; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 0; +}; + +class InvalidMandatoryParameterCause + : public Parameter, + public TLVTrait<InvalidMandatoryParameterCauseConfig> { + public: + static constexpr int kType = InvalidMandatoryParameterCauseConfig::kType; + + InvalidMandatoryParameterCause() {} + + static absl::optional<InvalidMandatoryParameterCause> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; +}; +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_ERROR_CAUSE_INVALID_MANDATORY_PARAMETER_CAUSE_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_mandatory_parameter_cause_test.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_mandatory_parameter_cause_test.cc new file mode 100644 index 0000000000..3d532d09b1 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_mandatory_parameter_cause_test.cc @@ -0,0 +1,35 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/invalid_mandatory_parameter_cause.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" + +namespace dcsctp { +namespace { + +TEST(InvalidMandatoryParameterCauseTest, SerializeAndDeserialize) { + InvalidMandatoryParameterCause parameter; + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN( + InvalidMandatoryParameterCause deserialized, + InvalidMandatoryParameterCause::Parse(serialized)); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_stream_identifier_cause.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_stream_identifier_cause.cc new file mode 100644 index 0000000000..b2ddd6f4ef --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_stream_identifier_cause.cc @@ -0,0 +1,60 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/invalid_stream_identifier_cause.h" + +#include <stdint.h> + +#include <string> +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.1 + +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cause Code=1 | Cause Length=8 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Stream Identifier | (Reserved) | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int InvalidStreamIdentifierCause::kType; + +absl::optional<InvalidStreamIdentifierCause> +InvalidStreamIdentifierCause::Parse(rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + StreamID stream_id(reader->Load16<4>()); + return InvalidStreamIdentifierCause(stream_id); +} + +void InvalidStreamIdentifierCause::SerializeTo( + std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out); + + writer.Store16<4>(*stream_id_); +} + +std::string InvalidStreamIdentifierCause::ToString() const { + rtc::StringBuilder sb; + sb << "Invalid Stream Identifier, stream_id=" << *stream_id_; + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_stream_identifier_cause.h b/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_stream_identifier_cause.h new file mode 100644 index 0000000000..b7dfe177b8 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_stream_identifier_cause.h @@ -0,0 +1,56 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_ERROR_CAUSE_INVALID_STREAM_IDENTIFIER_CAUSE_H_ +#define NET_DCSCTP_PACKET_ERROR_CAUSE_INVALID_STREAM_IDENTIFIER_CAUSE_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "net/dcsctp/public/types.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.1 +struct InvalidStreamIdentifierCauseConfig : public ParameterConfig { + static constexpr int kType = 1; + static constexpr size_t kHeaderSize = 8; + static constexpr size_t kVariableLengthAlignment = 0; +}; + +class InvalidStreamIdentifierCause + : public Parameter, + public TLVTrait<InvalidStreamIdentifierCauseConfig> { + public: + static constexpr int kType = InvalidStreamIdentifierCauseConfig::kType; + + explicit InvalidStreamIdentifierCause(StreamID stream_id) + : stream_id_(stream_id) {} + + static absl::optional<InvalidStreamIdentifierCause> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + StreamID stream_id() const { return stream_id_; } + + private: + StreamID stream_id_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_ERROR_CAUSE_INVALID_STREAM_IDENTIFIER_CAUSE_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_stream_identifier_cause_test.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_stream_identifier_cause_test.cc new file mode 100644 index 0000000000..a282ce5ee8 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/invalid_stream_identifier_cause_test.cc @@ -0,0 +1,36 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/invalid_stream_identifier_cause.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" + +namespace dcsctp { +namespace { + +TEST(InvalidStreamIdentifierCauseTest, SerializeAndDeserialize) { + InvalidStreamIdentifierCause parameter(StreamID(1)); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(InvalidStreamIdentifierCause deserialized, + InvalidStreamIdentifierCause::Parse(serialized)); + + EXPECT_EQ(*deserialized.stream_id(), 1); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/missing_mandatory_parameter_cause.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/missing_mandatory_parameter_cause.cc new file mode 100644 index 0000000000..b89f86e43e --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/missing_mandatory_parameter_cause.cc @@ -0,0 +1,90 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/missing_mandatory_parameter_cause.h" + +#include <stddef.h> + +#include <cstdint> +#include <string> +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/common/str_join.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/logging.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.2 + +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cause Code=2 | Cause Length=8+N*2 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Number of missing params=N | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Missing Param Type #1 | Missing Param Type #2 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Missing Param Type #N-1 | Missing Param Type #N | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int MissingMandatoryParameterCause::kType; + +absl::optional<MissingMandatoryParameterCause> +MissingMandatoryParameterCause::Parse(rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + uint32_t count = reader->Load32<4>(); + if (reader->variable_data_size() / kMissingParameterSize != count) { + RTC_DLOG(LS_WARNING) << "Invalid number of missing parameters"; + return absl::nullopt; + } + + std::vector<uint16_t> missing_parameter_types; + missing_parameter_types.reserve(count); + for (uint32_t i = 0; i < count; ++i) { + BoundedByteReader<kMissingParameterSize> sub_reader = + reader->sub_reader<kMissingParameterSize>(i * kMissingParameterSize); + + missing_parameter_types.push_back(sub_reader.Load16<0>()); + } + return MissingMandatoryParameterCause(missing_parameter_types); +} + +void MissingMandatoryParameterCause::SerializeTo( + std::vector<uint8_t>& out) const { + size_t variable_size = + missing_parameter_types_.size() * kMissingParameterSize; + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, variable_size); + + writer.Store32<4>(missing_parameter_types_.size()); + + for (size_t i = 0; i < missing_parameter_types_.size(); ++i) { + BoundedByteWriter<kMissingParameterSize> sub_writer = + writer.sub_writer<kMissingParameterSize>(i * kMissingParameterSize); + + sub_writer.Store16<0>(missing_parameter_types_[i]); + } +} + +std::string MissingMandatoryParameterCause::ToString() const { + rtc::StringBuilder sb; + sb << "Missing Mandatory Parameter, missing_parameter_types=" + << StrJoin(missing_parameter_types_, ","); + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/missing_mandatory_parameter_cause.h b/third_party/libwebrtc/net/dcsctp/packet/error_cause/missing_mandatory_parameter_cause.h new file mode 100644 index 0000000000..4435424295 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/missing_mandatory_parameter_cause.h @@ -0,0 +1,60 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_ERROR_CAUSE_MISSING_MANDATORY_PARAMETER_CAUSE_H_ +#define NET_DCSCTP_PACKET_ERROR_CAUSE_MISSING_MANDATORY_PARAMETER_CAUSE_H_ +#include <stddef.h> + +#include <cstdint> +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.2 +struct MissingMandatoryParameterCauseConfig : public ParameterConfig { + static constexpr int kType = 2; + static constexpr size_t kHeaderSize = 8; + static constexpr size_t kVariableLengthAlignment = 2; +}; + +class MissingMandatoryParameterCause + : public Parameter, + public TLVTrait<MissingMandatoryParameterCauseConfig> { + public: + static constexpr int kType = MissingMandatoryParameterCauseConfig::kType; + + explicit MissingMandatoryParameterCause( + rtc::ArrayView<const uint16_t> missing_parameter_types) + : missing_parameter_types_(missing_parameter_types.begin(), + missing_parameter_types.end()) {} + + static absl::optional<MissingMandatoryParameterCause> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + rtc::ArrayView<const uint16_t> missing_parameter_types() const { + return missing_parameter_types_; + } + + private: + static constexpr size_t kMissingParameterSize = 2; + std::vector<uint16_t> missing_parameter_types_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_ERROR_CAUSE_MISSING_MANDATORY_PARAMETER_CAUSE_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/missing_mandatory_parameter_cause_test.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/missing_mandatory_parameter_cause_test.cc new file mode 100644 index 0000000000..1c526ff0e2 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/missing_mandatory_parameter_cause_test.cc @@ -0,0 +1,59 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/missing_mandatory_parameter_cause.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; +using ::testing::IsEmpty; + +TEST(MissingMandatoryParameterCauseTest, SerializeAndDeserialize) { + uint16_t parameter_types[] = {1, 2, 3}; + MissingMandatoryParameterCause parameter(parameter_types); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN( + MissingMandatoryParameterCause deserialized, + MissingMandatoryParameterCause::Parse(serialized)); + + EXPECT_THAT(deserialized.missing_parameter_types(), ElementsAre(1, 2, 3)); +} + +TEST(MissingMandatoryParameterCauseTest, HandlesDeserializeZeroParameters) { + uint8_t serialized[] = {0, 2, 0, 8, 0, 0, 0, 0}; + + ASSERT_HAS_VALUE_AND_ASSIGN( + MissingMandatoryParameterCause deserialized, + MissingMandatoryParameterCause::Parse(serialized)); + + EXPECT_THAT(deserialized.missing_parameter_types(), IsEmpty()); +} + +TEST(MissingMandatoryParameterCauseTest, HandlesOverflowParameterCount) { + // 0x80000004 * 2 = 2**32 + 8 -> if overflow, would validate correctly. + uint8_t serialized[] = {0, 2, 0, 8, 0x80, 0x00, 0x00, 0x04}; + + EXPECT_FALSE(MissingMandatoryParameterCause::Parse(serialized).has_value()); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/no_user_data_cause.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/no_user_data_cause.cc new file mode 100644 index 0000000000..2853915b0c --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/no_user_data_cause.cc @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/no_user_data_cause.h" + +#include <stdint.h> + +#include <string> +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.9 + +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cause Code=9 | Cause Length=8 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// / TSN value / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int NoUserDataCause::kType; + +absl::optional<NoUserDataCause> NoUserDataCause::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + TSN tsn(reader->Load32<4>()); + return NoUserDataCause(tsn); +} + +void NoUserDataCause::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out); + writer.Store32<4>(*tsn_); +} + +std::string NoUserDataCause::ToString() const { + rtc::StringBuilder sb; + sb << "No User Data, tsn=" << *tsn_; + return sb.Release(); +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/no_user_data_cause.h b/third_party/libwebrtc/net/dcsctp/packet/error_cause/no_user_data_cause.h new file mode 100644 index 0000000000..1087dcc97c --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/no_user_data_cause.h @@ -0,0 +1,53 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_ERROR_CAUSE_NO_USER_DATA_CAUSE_H_ +#define NET_DCSCTP_PACKET_ERROR_CAUSE_NO_USER_DATA_CAUSE_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/common/internal_types.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.9 +struct NoUserDataCauseConfig : public ParameterConfig { + static constexpr int kType = 9; + static constexpr size_t kHeaderSize = 8; + static constexpr size_t kVariableLengthAlignment = 0; +}; + +class NoUserDataCause : public Parameter, + public TLVTrait<NoUserDataCauseConfig> { + public: + static constexpr int kType = NoUserDataCauseConfig::kType; + + explicit NoUserDataCause(TSN tsn) : tsn_(tsn) {} + + static absl::optional<NoUserDataCause> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + TSN tsn() const { return tsn_; } + + private: + TSN tsn_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_ERROR_CAUSE_NO_USER_DATA_CAUSE_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/no_user_data_cause_test.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/no_user_data_cause_test.cc new file mode 100644 index 0000000000..0a535bf4fa --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/no_user_data_cause_test.cc @@ -0,0 +1,36 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/no_user_data_cause.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" + +namespace dcsctp { +namespace { + +TEST(NoUserDataCauseTest, SerializeAndDeserialize) { + NoUserDataCause parameter(TSN(123)); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(NoUserDataCause deserialized, + NoUserDataCause::Parse(serialized)); + + EXPECT_EQ(*deserialized.tsn(), 123u); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/out_of_resource_error_cause.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/out_of_resource_error_cause.cc new file mode 100644 index 0000000000..e5c7c0e787 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/out_of_resource_error_cause.cc @@ -0,0 +1,44 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/out_of_resource_error_cause.h" + +#include <stdint.h> + +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.4 + +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cause Code=4 | Cause Length=4 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int OutOfResourceErrorCause::kType; + +absl::optional<OutOfResourceErrorCause> OutOfResourceErrorCause::Parse( + rtc::ArrayView<const uint8_t> data) { + if (!ParseTLV(data).has_value()) { + return absl::nullopt; + } + return OutOfResourceErrorCause(); +} + +void OutOfResourceErrorCause::SerializeTo(std::vector<uint8_t>& out) const { + AllocateTLV(out); +} + +std::string OutOfResourceErrorCause::ToString() const { + return "Out Of Resource"; +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/out_of_resource_error_cause.h b/third_party/libwebrtc/net/dcsctp/packet/error_cause/out_of_resource_error_cause.h new file mode 100644 index 0000000000..fc798ca4ac --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/out_of_resource_error_cause.h @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_ERROR_CAUSE_OUT_OF_RESOURCE_ERROR_CAUSE_H_ +#define NET_DCSCTP_PACKET_ERROR_CAUSE_OUT_OF_RESOURCE_ERROR_CAUSE_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.4 +struct OutOfResourceParameterConfig : public ParameterConfig { + static constexpr int kType = 4; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 0; +}; + +class OutOfResourceErrorCause : public Parameter, + public TLVTrait<OutOfResourceParameterConfig> { + public: + static constexpr int kType = OutOfResourceParameterConfig::kType; + + OutOfResourceErrorCause() {} + + static absl::optional<OutOfResourceErrorCause> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_ERROR_CAUSE_OUT_OF_RESOURCE_ERROR_CAUSE_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/out_of_resource_error_cause_test.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/out_of_resource_error_cause_test.cc new file mode 100644 index 0000000000..501fc201cd --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/out_of_resource_error_cause_test.cc @@ -0,0 +1,34 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/out_of_resource_error_cause.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" + +namespace dcsctp { +namespace { + +TEST(OutOfResourceErrorCauseTest, SerializeAndDeserialize) { + OutOfResourceErrorCause parameter; + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(OutOfResourceErrorCause deserialized, + OutOfResourceErrorCause::Parse(serialized)); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/protocol_violation_cause.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/protocol_violation_cause.cc new file mode 100644 index 0000000000..1b8d423afb --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/protocol_violation_cause.cc @@ -0,0 +1,65 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/protocol_violation_cause.h" + +#include <stdint.h> + +#include <string> +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.13 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cause Code=13 | Cause Length=Variable | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// / Additional Information / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int ProtocolViolationCause::kType; + +absl::optional<ProtocolViolationCause> ProtocolViolationCause::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + return ProtocolViolationCause( + std::string(reinterpret_cast<const char*>(reader->variable_data().data()), + reader->variable_data().size())); +} + +void ProtocolViolationCause::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = + AllocateTLV(out, additional_information_.size()); + writer.CopyToVariableData(rtc::MakeArrayView( + reinterpret_cast<const uint8_t*>(additional_information_.data()), + additional_information_.size())); +} + +std::string ProtocolViolationCause::ToString() const { + rtc::StringBuilder sb; + sb << "Protocol Violation, additional_information=" + << additional_information_; + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/protocol_violation_cause.h b/third_party/libwebrtc/net/dcsctp/packet/error_cause/protocol_violation_cause.h new file mode 100644 index 0000000000..3081e1f28c --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/protocol_violation_cause.h @@ -0,0 +1,56 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_ERROR_CAUSE_PROTOCOL_VIOLATION_CAUSE_H_ +#define NET_DCSCTP_PACKET_ERROR_CAUSE_PROTOCOL_VIOLATION_CAUSE_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.13 +struct ProtocolViolationCauseConfig : public ParameterConfig { + static constexpr int kType = 13; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class ProtocolViolationCause : public Parameter, + public TLVTrait<ProtocolViolationCauseConfig> { + public: + static constexpr int kType = ProtocolViolationCauseConfig::kType; + + explicit ProtocolViolationCause(absl::string_view additional_information) + : additional_information_(additional_information) {} + + static absl::optional<ProtocolViolationCause> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + absl::string_view additional_information() const { + return additional_information_; + } + + private: + std::string additional_information_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_ERROR_CAUSE_PROTOCOL_VIOLATION_CAUSE_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/protocol_violation_cause_test.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/protocol_violation_cause_test.cc new file mode 100644 index 0000000000..902d867091 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/protocol_violation_cause_test.cc @@ -0,0 +1,61 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/protocol_violation_cause.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::SizeIs; + +TEST(ProtocolViolationCauseTest, EmptyReason) { + Parameters causes = + Parameters::Builder().Add(ProtocolViolationCause("")).Build(); + + ASSERT_HAS_VALUE_AND_ASSIGN(Parameters deserialized, + Parameters::Parse(causes.data())); + ASSERT_THAT(deserialized.descriptors(), SizeIs(1)); + EXPECT_EQ(deserialized.descriptors()[0].type, ProtocolViolationCause::kType); + + ASSERT_HAS_VALUE_AND_ASSIGN( + ProtocolViolationCause cause, + ProtocolViolationCause::Parse(deserialized.descriptors()[0].data)); + + EXPECT_EQ(cause.additional_information(), ""); +} + +TEST(ProtocolViolationCauseTest, SetReason) { + Parameters causes = Parameters::Builder() + .Add(ProtocolViolationCause("Reason goes here")) + .Build(); + + ASSERT_HAS_VALUE_AND_ASSIGN(Parameters deserialized, + Parameters::Parse(causes.data())); + ASSERT_THAT(deserialized.descriptors(), SizeIs(1)); + EXPECT_EQ(deserialized.descriptors()[0].type, ProtocolViolationCause::kType); + + ASSERT_HAS_VALUE_AND_ASSIGN( + ProtocolViolationCause cause, + ProtocolViolationCause::Parse(deserialized.descriptors()[0].data)); + + EXPECT_EQ(cause.additional_information(), "Reason goes here"); +} +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/restart_of_an_association_with_new_address_cause.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/restart_of_an_association_with_new_address_cause.cc new file mode 100644 index 0000000000..abe5de6211 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/restart_of_an_association_with_new_address_cause.cc @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/restart_of_an_association_with_new_address_cause.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.11 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cause Code=11 | Cause Length=Variable | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// / New Address TLVs / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int RestartOfAnAssociationWithNewAddressesCause::kType; + +absl::optional<RestartOfAnAssociationWithNewAddressesCause> +RestartOfAnAssociationWithNewAddressesCause::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + return RestartOfAnAssociationWithNewAddressesCause(reader->variable_data()); +} + +void RestartOfAnAssociationWithNewAddressesCause::SerializeTo( + std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = + AllocateTLV(out, new_address_tlvs_.size()); + writer.CopyToVariableData(new_address_tlvs_); +} + +std::string RestartOfAnAssociationWithNewAddressesCause::ToString() const { + return "Restart of an Association with New Addresses"; +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/restart_of_an_association_with_new_address_cause.h b/third_party/libwebrtc/net/dcsctp/packet/error_cause/restart_of_an_association_with_new_address_cause.h new file mode 100644 index 0000000000..a1cccdc8a1 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/restart_of_an_association_with_new_address_cause.h @@ -0,0 +1,59 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_ERROR_CAUSE_RESTART_OF_AN_ASSOCIATION_WITH_NEW_ADDRESS_CAUSE_H_ +#define NET_DCSCTP_PACKET_ERROR_CAUSE_RESTART_OF_AN_ASSOCIATION_WITH_NEW_ADDRESS_CAUSE_H_ +#include <stddef.h> + +#include <cstdint> +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.11 +struct RestartOfAnAssociationWithNewAddressesCauseConfig + : public ParameterConfig { + static constexpr int kType = 11; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class RestartOfAnAssociationWithNewAddressesCause + : public Parameter, + public TLVTrait<RestartOfAnAssociationWithNewAddressesCauseConfig> { + public: + static constexpr int kType = + RestartOfAnAssociationWithNewAddressesCauseConfig::kType; + + explicit RestartOfAnAssociationWithNewAddressesCause( + rtc::ArrayView<const uint8_t> new_address_tlvs) + : new_address_tlvs_(new_address_tlvs.begin(), new_address_tlvs.end()) {} + + static absl::optional<RestartOfAnAssociationWithNewAddressesCause> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + rtc::ArrayView<const uint8_t> new_address_tlvs() const { + return new_address_tlvs_; + } + + private: + std::vector<uint8_t> new_address_tlvs_; +}; +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_ERROR_CAUSE_RESTART_OF_AN_ASSOCIATION_WITH_NEW_ADDRESS_CAUSE_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/restart_of_an_association_with_new_address_cause_test.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/restart_of_an_association_with_new_address_cause_test.cc new file mode 100644 index 0000000000..b8ab8b6803 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/restart_of_an_association_with_new_address_cause_test.cc @@ -0,0 +1,41 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/restart_of_an_association_with_new_address_cause.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(RestartOfAnAssociationWithNewAddressesCauseTest, SerializeAndDeserialize) { + uint8_t data[] = {1, 2, 3}; + RestartOfAnAssociationWithNewAddressesCause parameter(data); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN( + RestartOfAnAssociationWithNewAddressesCause deserialized, + RestartOfAnAssociationWithNewAddressesCause::Parse(serialized)); + + EXPECT_THAT(deserialized.new_address_tlvs(), ElementsAre(1, 2, 3)); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/stale_cookie_error_cause.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/stale_cookie_error_cause.cc new file mode 100644 index 0000000000..d77d8488f1 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/stale_cookie_error_cause.cc @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/stale_cookie_error_cause.h" + +#include <stdint.h> + +#include <string> +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.3 + +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cause Code=3 | Cause Length=8 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Measure of Staleness (usec.) | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int StaleCookieErrorCause::kType; + +absl::optional<StaleCookieErrorCause> StaleCookieErrorCause::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + uint32_t staleness_us = reader->Load32<4>(); + return StaleCookieErrorCause(staleness_us); +} + +void StaleCookieErrorCause::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out); + writer.Store32<4>(staleness_us_); +} + +std::string StaleCookieErrorCause::ToString() const { + rtc::StringBuilder sb; + sb << "Stale Cookie Error, staleness_us=" << staleness_us_; + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/stale_cookie_error_cause.h b/third_party/libwebrtc/net/dcsctp/packet/error_cause/stale_cookie_error_cause.h new file mode 100644 index 0000000000..d8b7b5b5bd --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/stale_cookie_error_cause.h @@ -0,0 +1,54 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_ERROR_CAUSE_STALE_COOKIE_ERROR_CAUSE_H_ +#define NET_DCSCTP_PACKET_ERROR_CAUSE_STALE_COOKIE_ERROR_CAUSE_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.3 +struct StaleCookieParameterConfig : public ParameterConfig { + static constexpr int kType = 3; + static constexpr size_t kHeaderSize = 8; + static constexpr size_t kVariableLengthAlignment = 0; +}; + +class StaleCookieErrorCause : public Parameter, + public TLVTrait<StaleCookieParameterConfig> { + public: + static constexpr int kType = StaleCookieParameterConfig::kType; + + explicit StaleCookieErrorCause(uint32_t staleness_us) + : staleness_us_(staleness_us) {} + + static absl::optional<StaleCookieErrorCause> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + uint16_t staleness_us() const { return staleness_us_; } + + private: + uint32_t staleness_us_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_ERROR_CAUSE_STALE_COOKIE_ERROR_CAUSE_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/stale_cookie_error_cause_test.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/stale_cookie_error_cause_test.cc new file mode 100644 index 0000000000..c0d1ac1c58 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/stale_cookie_error_cause_test.cc @@ -0,0 +1,35 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/stale_cookie_error_cause.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" + +namespace dcsctp { +namespace { + +TEST(StaleCookieErrorCauseTest, SerializeAndDeserialize) { + StaleCookieErrorCause parameter(123); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(StaleCookieErrorCause deserialized, + StaleCookieErrorCause::Parse(serialized)); + + EXPECT_EQ(deserialized.staleness_us(), 123); +} +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause.cc new file mode 100644 index 0000000000..04b960d992 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause.cc @@ -0,0 +1,64 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause.h" + +#include <cstdint> +#include <string> +#include <utility> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.6 + +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cause Code=6 | Cause Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// / Unrecognized Chunk / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int UnrecognizedChunkTypeCause::kType; + +absl::optional<UnrecognizedChunkTypeCause> UnrecognizedChunkTypeCause::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + std::vector<uint8_t> unrecognized_chunk(reader->variable_data().begin(), + reader->variable_data().end()); + return UnrecognizedChunkTypeCause(std::move(unrecognized_chunk)); +} + +void UnrecognizedChunkTypeCause::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = + AllocateTLV(out, unrecognized_chunk_.size()); + writer.CopyToVariableData(unrecognized_chunk_); +} + +std::string UnrecognizedChunkTypeCause::ToString() const { + rtc::StringBuilder sb; + sb << "Unrecognized Chunk Type, chunk_type="; + if (!unrecognized_chunk_.empty()) { + sb << static_cast<int>(unrecognized_chunk_[0]); + } else { + sb << "<missing>"; + } + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause.h b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause.h new file mode 100644 index 0000000000..26d3d3b8f9 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause.h @@ -0,0 +1,59 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_ERROR_CAUSE_UNRECOGNIZED_CHUNK_TYPE_CAUSE_H_ +#define NET_DCSCTP_PACKET_ERROR_CAUSE_UNRECOGNIZED_CHUNK_TYPE_CAUSE_H_ +#include <stddef.h> +#include <stdint.h> + +#include <cstdint> +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.6 +struct UnrecognizedChunkTypeCauseConfig : public ParameterConfig { + static constexpr int kType = 6; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class UnrecognizedChunkTypeCause + : public Parameter, + public TLVTrait<UnrecognizedChunkTypeCauseConfig> { + public: + static constexpr int kType = UnrecognizedChunkTypeCauseConfig::kType; + + explicit UnrecognizedChunkTypeCause(std::vector<uint8_t> unrecognized_chunk) + : unrecognized_chunk_(std::move(unrecognized_chunk)) {} + + static absl::optional<UnrecognizedChunkTypeCause> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + rtc::ArrayView<const uint8_t> unrecognized_chunk() const { + return unrecognized_chunk_; + } + + private: + std::vector<uint8_t> unrecognized_chunk_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_ERROR_CAUSE_UNRECOGNIZED_CHUNK_TYPE_CAUSE_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause_test.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause_test.cc new file mode 100644 index 0000000000..baff852f40 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause_test.cc @@ -0,0 +1,37 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause.h" + +#include <cstdint> +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(UnrecognizedChunkTypeCauseTest, SerializeAndDeserialize) { + UnrecognizedChunkTypeCause parameter({1, 2, 3}); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(UnrecognizedChunkTypeCause deserialized, + UnrecognizedChunkTypeCause::Parse(serialized)); + + EXPECT_THAT(deserialized.unrecognized_chunk(), ElementsAre(1, 2, 3)); +} +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_parameter_cause.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_parameter_cause.cc new file mode 100644 index 0000000000..80001a9eae --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_parameter_cause.cc @@ -0,0 +1,54 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/unrecognized_parameter_cause.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.8 + +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cause Code=8 | Cause Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// / Unrecognized Parameters / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int UnrecognizedParametersCause::kType; + +absl::optional<UnrecognizedParametersCause> UnrecognizedParametersCause::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + return UnrecognizedParametersCause(reader->variable_data()); +} + +void UnrecognizedParametersCause::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = + AllocateTLV(out, unrecognized_parameters_.size()); + writer.CopyToVariableData(unrecognized_parameters_); +} + +std::string UnrecognizedParametersCause::ToString() const { + return "Unrecognized Parameters"; +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_parameter_cause.h b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_parameter_cause.h new file mode 100644 index 0000000000..ebec5ed4c3 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_parameter_cause.h @@ -0,0 +1,60 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_ERROR_CAUSE_UNRECOGNIZED_PARAMETER_CAUSE_H_ +#define NET_DCSCTP_PACKET_ERROR_CAUSE_UNRECOGNIZED_PARAMETER_CAUSE_H_ +#include <stddef.h> +#include <stdint.h> + +#include <cstdint> +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.8 +struct UnrecognizedParametersCauseConfig : public ParameterConfig { + static constexpr int kType = 8; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class UnrecognizedParametersCause + : public Parameter, + public TLVTrait<UnrecognizedParametersCauseConfig> { + public: + static constexpr int kType = UnrecognizedParametersCauseConfig::kType; + + explicit UnrecognizedParametersCause( + rtc::ArrayView<const uint8_t> unrecognized_parameters) + : unrecognized_parameters_(unrecognized_parameters.begin(), + unrecognized_parameters.end()) {} + + static absl::optional<UnrecognizedParametersCause> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + rtc::ArrayView<const uint8_t> unrecognized_parameters() const { + return unrecognized_parameters_; + } + + private: + std::vector<uint8_t> unrecognized_parameters_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_ERROR_CAUSE_UNRECOGNIZED_PARAMETER_CAUSE_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_parameter_cause_test.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_parameter_cause_test.cc new file mode 100644 index 0000000000..0449599ca6 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_parameter_cause_test.cc @@ -0,0 +1,39 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/unrecognized_parameter_cause.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(UnrecognizedParametersCauseTest, SerializeAndDeserialize) { + uint8_t unrecognized_parameters[] = {1, 2, 3}; + UnrecognizedParametersCause parameter(unrecognized_parameters); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(UnrecognizedParametersCause deserialized, + UnrecognizedParametersCause::Parse(serialized)); + + EXPECT_THAT(deserialized.unrecognized_parameters(), ElementsAre(1, 2, 3)); +} +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/unresolvable_address_cause.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unresolvable_address_cause.cc new file mode 100644 index 0000000000..8108d31aa7 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unresolvable_address_cause.cc @@ -0,0 +1,53 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/unresolvable_address_cause.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.5 + +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cause Code=5 | Cause Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// / Unresolvable Address / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int UnresolvableAddressCause::kType; + +absl::optional<UnresolvableAddressCause> UnresolvableAddressCause::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + return UnresolvableAddressCause(reader->variable_data()); +} + +void UnresolvableAddressCause::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = + AllocateTLV(out, unresolvable_address_.size()); + writer.CopyToVariableData(unresolvable_address_); +} + +std::string UnresolvableAddressCause::ToString() const { + return "Unresolvable Address"; +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/unresolvable_address_cause.h b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unresolvable_address_cause.h new file mode 100644 index 0000000000..c63b3779ef --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unresolvable_address_cause.h @@ -0,0 +1,60 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_ERROR_CAUSE_UNRESOLVABLE_ADDRESS_CAUSE_H_ +#define NET_DCSCTP_PACKET_ERROR_CAUSE_UNRESOLVABLE_ADDRESS_CAUSE_H_ +#include <stddef.h> +#include <stdint.h> + +#include <cstdint> +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.5 +struct UnresolvableAddressCauseConfig : public ParameterConfig { + static constexpr int kType = 5; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class UnresolvableAddressCause + : public Parameter, + public TLVTrait<UnresolvableAddressCauseConfig> { + public: + static constexpr int kType = UnresolvableAddressCauseConfig::kType; + + explicit UnresolvableAddressCause( + rtc::ArrayView<const uint8_t> unresolvable_address) + : unresolvable_address_(unresolvable_address.begin(), + unresolvable_address.end()) {} + + static absl::optional<UnresolvableAddressCause> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + rtc::ArrayView<const uint8_t> unresolvable_address() const { + return unresolvable_address_; + } + + private: + std::vector<uint8_t> unresolvable_address_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_ERROR_CAUSE_UNRESOLVABLE_ADDRESS_CAUSE_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/unresolvable_address_cause_test.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unresolvable_address_cause_test.cc new file mode 100644 index 0000000000..688730e6b3 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unresolvable_address_cause_test.cc @@ -0,0 +1,39 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/unresolvable_address_cause.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(UnresolvableAddressCauseTest, SerializeAndDeserialize) { + uint8_t unresolvable_address[] = {1, 2, 3}; + UnresolvableAddressCause parameter(unresolvable_address); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(UnresolvableAddressCause deserialized, + UnresolvableAddressCause::Parse(serialized)); + + EXPECT_THAT(deserialized.unresolvable_address(), ElementsAre(1, 2, 3)); +} +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/user_initiated_abort_cause.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/user_initiated_abort_cause.cc new file mode 100644 index 0000000000..da99aacbfa --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/user_initiated_abort_cause.cc @@ -0,0 +1,67 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/user_initiated_abort_cause.h" + +#include <stdint.h> + +#include <string> +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.12 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cause Code=12 | Cause Length=Variable | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// / Upper Layer Abort Reason / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int UserInitiatedAbortCause::kType; + +absl::optional<UserInitiatedAbortCause> UserInitiatedAbortCause::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + if (reader->variable_data().empty()) { + return UserInitiatedAbortCause(""); + } + return UserInitiatedAbortCause( + std::string(reinterpret_cast<const char*>(reader->variable_data().data()), + reader->variable_data().size())); +} + +void UserInitiatedAbortCause::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = + AllocateTLV(out, upper_layer_abort_reason_.size()); + writer.CopyToVariableData(rtc::MakeArrayView( + reinterpret_cast<const uint8_t*>(upper_layer_abort_reason_.data()), + upper_layer_abort_reason_.size())); +} + +std::string UserInitiatedAbortCause::ToString() const { + rtc::StringBuilder sb; + sb << "User-Initiated Abort, reason=" << upper_layer_abort_reason_; + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/user_initiated_abort_cause.h b/third_party/libwebrtc/net/dcsctp/packet/error_cause/user_initiated_abort_cause.h new file mode 100644 index 0000000000..9eb16657b4 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/user_initiated_abort_cause.h @@ -0,0 +1,56 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_ERROR_CAUSE_USER_INITIATED_ABORT_CAUSE_H_ +#define NET_DCSCTP_PACKET_ERROR_CAUSE_USER_INITIATED_ABORT_CAUSE_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.10.12 +struct UserInitiatedAbortCauseConfig : public ParameterConfig { + static constexpr int kType = 12; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class UserInitiatedAbortCause : public Parameter, + public TLVTrait<UserInitiatedAbortCauseConfig> { + public: + static constexpr int kType = UserInitiatedAbortCauseConfig::kType; + + explicit UserInitiatedAbortCause(absl::string_view upper_layer_abort_reason) + : upper_layer_abort_reason_(upper_layer_abort_reason) {} + + static absl::optional<UserInitiatedAbortCause> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + absl::string_view upper_layer_abort_reason() const { + return upper_layer_abort_reason_; + } + + private: + std::string upper_layer_abort_reason_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_ERROR_CAUSE_USER_INITIATED_ABORT_CAUSE_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/user_initiated_abort_cause_test.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/user_initiated_abort_cause_test.cc new file mode 100644 index 0000000000..250959e3df --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/user_initiated_abort_cause_test.cc @@ -0,0 +1,62 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/error_cause/user_initiated_abort_cause.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::SizeIs; + +TEST(UserInitiatedAbortCauseTest, EmptyReason) { + Parameters causes = + Parameters::Builder().Add(UserInitiatedAbortCause("")).Build(); + + ASSERT_HAS_VALUE_AND_ASSIGN(Parameters deserialized, + Parameters::Parse(causes.data())); + ASSERT_THAT(deserialized.descriptors(), SizeIs(1)); + EXPECT_EQ(deserialized.descriptors()[0].type, UserInitiatedAbortCause::kType); + + ASSERT_HAS_VALUE_AND_ASSIGN( + UserInitiatedAbortCause cause, + UserInitiatedAbortCause::Parse(deserialized.descriptors()[0].data)); + + EXPECT_EQ(cause.upper_layer_abort_reason(), ""); +} + +TEST(UserInitiatedAbortCauseTest, SetReason) { + Parameters causes = Parameters::Builder() + .Add(UserInitiatedAbortCause("User called Close")) + .Build(); + + ASSERT_HAS_VALUE_AND_ASSIGN(Parameters deserialized, + Parameters::Parse(causes.data())); + ASSERT_THAT(deserialized.descriptors(), SizeIs(1)); + EXPECT_EQ(deserialized.descriptors()[0].type, UserInitiatedAbortCause::kType); + + ASSERT_HAS_VALUE_AND_ASSIGN( + UserInitiatedAbortCause cause, + UserInitiatedAbortCause::Parse(deserialized.descriptors()[0].data)); + + EXPECT_EQ(cause.upper_layer_abort_reason(), "User called Close"); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/add_incoming_streams_request_parameter.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/add_incoming_streams_request_parameter.cc new file mode 100644 index 0000000000..c33e3e11f6 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/add_incoming_streams_request_parameter.cc @@ -0,0 +1,68 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/add_incoming_streams_request_parameter.h" + +#include <stdint.h> + +#include <string> +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/common/internal_types.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc6525#section-4.6 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Parameter Type = 18 | Parameter Length = 12 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Re-configuration Request Sequence Number | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Number of new streams | Reserved | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int AddIncomingStreamsRequestParameter::kType; + +absl::optional<AddIncomingStreamsRequestParameter> +AddIncomingStreamsRequestParameter::Parse(rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + ReconfigRequestSN request_sequence_number(reader->Load32<4>()); + uint16_t nbr_of_new_streams = reader->Load16<8>(); + + return AddIncomingStreamsRequestParameter(request_sequence_number, + nbr_of_new_streams); +} + +void AddIncomingStreamsRequestParameter::SerializeTo( + std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out); + writer.Store32<4>(*request_sequence_number_); + writer.Store16<8>(nbr_of_new_streams_); +} + +std::string AddIncomingStreamsRequestParameter::ToString() const { + rtc::StringBuilder sb; + sb << "Add Incoming Streams Request, req_seq_nbr=" + << *request_sequence_number(); + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/add_incoming_streams_request_parameter.h b/third_party/libwebrtc/net/dcsctp/packet/parameter/add_incoming_streams_request_parameter.h new file mode 100644 index 0000000000..3859eb3f7e --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/add_incoming_streams_request_parameter.h @@ -0,0 +1,63 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_PARAMETER_ADD_INCOMING_STREAMS_REQUEST_PARAMETER_H_ +#define NET_DCSCTP_PACKET_PARAMETER_ADD_INCOMING_STREAMS_REQUEST_PARAMETER_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/common/internal_types.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc6525#section-4.6 +struct AddIncomingStreamsRequestParameterConfig : ParameterConfig { + static constexpr int kType = 18; + static constexpr size_t kHeaderSize = 12; + static constexpr size_t kVariableLengthAlignment = 0; +}; + +class AddIncomingStreamsRequestParameter + : public Parameter, + public TLVTrait<AddIncomingStreamsRequestParameterConfig> { + public: + static constexpr int kType = AddIncomingStreamsRequestParameterConfig::kType; + + explicit AddIncomingStreamsRequestParameter( + ReconfigRequestSN request_sequence_number, + uint16_t nbr_of_new_streams) + : request_sequence_number_(request_sequence_number), + nbr_of_new_streams_(nbr_of_new_streams) {} + + static absl::optional<AddIncomingStreamsRequestParameter> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + ReconfigRequestSN request_sequence_number() const { + return request_sequence_number_; + } + uint16_t nbr_of_new_streams() const { return nbr_of_new_streams_; } + + private: + ReconfigRequestSN request_sequence_number_; + uint16_t nbr_of_new_streams_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_PARAMETER_ADD_INCOMING_STREAMS_REQUEST_PARAMETER_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/add_incoming_streams_request_parameter_test.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/add_incoming_streams_request_parameter_test.cc new file mode 100644 index 0000000000..a29257a8f8 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/add_incoming_streams_request_parameter_test.cc @@ -0,0 +1,38 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/add_incoming_streams_request_parameter.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" + +namespace dcsctp { +namespace { + +TEST(AddIncomingStreamsRequestParameterTest, SerializeAndDeserialize) { + AddIncomingStreamsRequestParameter parameter(ReconfigRequestSN(1), 2); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN( + AddIncomingStreamsRequestParameter deserialized, + AddIncomingStreamsRequestParameter::Parse(serialized)); + + EXPECT_EQ(*deserialized.request_sequence_number(), 1u); + EXPECT_EQ(deserialized.nbr_of_new_streams(), 2u); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/add_outgoing_streams_request_parameter.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/add_outgoing_streams_request_parameter.cc new file mode 100644 index 0000000000..4787ee9718 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/add_outgoing_streams_request_parameter.cc @@ -0,0 +1,67 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/add_outgoing_streams_request_parameter.h" + +#include <stdint.h> + +#include <string> +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc6525#section-4.5 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Parameter Type = 17 | Parameter Length = 12 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Re-configuration Request Sequence Number | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Number of new streams | Reserved | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int AddOutgoingStreamsRequestParameter::kType; + +absl::optional<AddOutgoingStreamsRequestParameter> +AddOutgoingStreamsRequestParameter::Parse(rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + ReconfigRequestSN request_sequence_number(reader->Load32<4>()); + uint16_t nbr_of_new_streams = reader->Load16<8>(); + + return AddOutgoingStreamsRequestParameter(request_sequence_number, + nbr_of_new_streams); +} + +void AddOutgoingStreamsRequestParameter::SerializeTo( + std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out); + writer.Store32<4>(*request_sequence_number_); + writer.Store16<8>(nbr_of_new_streams_); +} + +std::string AddOutgoingStreamsRequestParameter::ToString() const { + rtc::StringBuilder sb; + sb << "Add Outgoing Streams Request, req_seq_nbr=" + << *request_sequence_number(); + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/add_outgoing_streams_request_parameter.h b/third_party/libwebrtc/net/dcsctp/packet/parameter/add_outgoing_streams_request_parameter.h new file mode 100644 index 0000000000..01e8f91cfa --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/add_outgoing_streams_request_parameter.h @@ -0,0 +1,63 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_PARAMETER_ADD_OUTGOING_STREAMS_REQUEST_PARAMETER_H_ +#define NET_DCSCTP_PACKET_PARAMETER_ADD_OUTGOING_STREAMS_REQUEST_PARAMETER_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/common/internal_types.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc6525#section-4.5 +struct AddOutgoingStreamsRequestParameterConfig : ParameterConfig { + static constexpr int kType = 17; + static constexpr size_t kHeaderSize = 12; + static constexpr size_t kVariableLengthAlignment = 0; +}; + +class AddOutgoingStreamsRequestParameter + : public Parameter, + public TLVTrait<AddOutgoingStreamsRequestParameterConfig> { + public: + static constexpr int kType = AddOutgoingStreamsRequestParameterConfig::kType; + + explicit AddOutgoingStreamsRequestParameter( + ReconfigRequestSN request_sequence_number, + uint16_t nbr_of_new_streams) + : request_sequence_number_(request_sequence_number), + nbr_of_new_streams_(nbr_of_new_streams) {} + + static absl::optional<AddOutgoingStreamsRequestParameter> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + ReconfigRequestSN request_sequence_number() const { + return request_sequence_number_; + } + uint16_t nbr_of_new_streams() const { return nbr_of_new_streams_; } + + private: + ReconfigRequestSN request_sequence_number_; + uint16_t nbr_of_new_streams_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_PARAMETER_ADD_OUTGOING_STREAMS_REQUEST_PARAMETER_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/add_outgoing_streams_request_parameter_test.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/add_outgoing_streams_request_parameter_test.cc new file mode 100644 index 0000000000..d0303b1ba8 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/add_outgoing_streams_request_parameter_test.cc @@ -0,0 +1,38 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/add_outgoing_streams_request_parameter.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" + +namespace dcsctp { +namespace { + +TEST(AddOutgoingStreamsRequestParameterTest, SerializeAndDeserialize) { + AddOutgoingStreamsRequestParameter parameter(ReconfigRequestSN(1), 2); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN( + AddOutgoingStreamsRequestParameter deserialized, + AddOutgoingStreamsRequestParameter::Parse(serialized)); + + EXPECT_EQ(*deserialized.request_sequence_number(), 1u); + EXPECT_EQ(deserialized.nbr_of_new_streams(), 2u); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/forward_tsn_supported_parameter.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/forward_tsn_supported_parameter.cc new file mode 100644 index 0000000000..7dd8e1923f --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/forward_tsn_supported_parameter.cc @@ -0,0 +1,45 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/forward_tsn_supported_parameter.h" + +#include <stdint.h> + +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc3758#section-3.1 + +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Parameter Type = 49152 | Parameter Length = 4 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int ForwardTsnSupportedParameter::kType; + +absl::optional<ForwardTsnSupportedParameter> +ForwardTsnSupportedParameter::Parse(rtc::ArrayView<const uint8_t> data) { + if (!ParseTLV(data).has_value()) { + return absl::nullopt; + } + return ForwardTsnSupportedParameter(); +} + +void ForwardTsnSupportedParameter::SerializeTo( + std::vector<uint8_t>& out) const { + AllocateTLV(out); +} + +std::string ForwardTsnSupportedParameter::ToString() const { + return "Forward TSN Supported"; +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/forward_tsn_supported_parameter.h b/third_party/libwebrtc/net/dcsctp/packet/parameter/forward_tsn_supported_parameter.h new file mode 100644 index 0000000000..d4cff4ac21 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/forward_tsn_supported_parameter.h @@ -0,0 +1,49 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_PARAMETER_FORWARD_TSN_SUPPORTED_PARAMETER_H_ +#define NET_DCSCTP_PACKET_PARAMETER_FORWARD_TSN_SUPPORTED_PARAMETER_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc3758#section-3.1 +struct ForwardTsnSupportedParameterConfig : ParameterConfig { + static constexpr int kType = 49152; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 0; +}; + +class ForwardTsnSupportedParameter + : public Parameter, + public TLVTrait<ForwardTsnSupportedParameterConfig> { + public: + static constexpr int kType = ForwardTsnSupportedParameterConfig::kType; + + ForwardTsnSupportedParameter() {} + + static absl::optional<ForwardTsnSupportedParameter> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_PARAMETER_FORWARD_TSN_SUPPORTED_PARAMETER_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/forward_tsn_supported_parameter_test.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/forward_tsn_supported_parameter_test.cc new file mode 100644 index 0000000000..fb4f983fae --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/forward_tsn_supported_parameter_test.cc @@ -0,0 +1,34 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/forward_tsn_supported_parameter.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" + +namespace dcsctp { +namespace { + +TEST(ForwardTsnSupportedParameterTest, SerializeAndDeserialize) { + ForwardTsnSupportedParameter parameter; + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(ForwardTsnSupportedParameter deserialized, + ForwardTsnSupportedParameter::Parse(serialized)); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/heartbeat_info_parameter.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/heartbeat_info_parameter.cc new file mode 100644 index 0000000000..918976d305 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/heartbeat_info_parameter.cc @@ -0,0 +1,60 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/heartbeat_info_parameter.h" + +#include <stdint.h> + +#include <string> +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.5 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 4 | Chunk Flags | Heartbeat Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// \ \ +// / Heartbeat Information TLV (Variable-Length) / +// \ \ +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int HeartbeatInfoParameter::kType; + +absl::optional<HeartbeatInfoParameter> HeartbeatInfoParameter::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + return HeartbeatInfoParameter(reader->variable_data()); +} + +void HeartbeatInfoParameter::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, info_.size()); + writer.CopyToVariableData(info_); +} + +std::string HeartbeatInfoParameter::ToString() const { + rtc::StringBuilder sb; + sb << "Heartbeat Info parameter (info_length=" << info_.size() << ")"; + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/heartbeat_info_parameter.h b/third_party/libwebrtc/net/dcsctp/packet/parameter/heartbeat_info_parameter.h new file mode 100644 index 0000000000..ec503a94b2 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/heartbeat_info_parameter.h @@ -0,0 +1,54 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_PARAMETER_HEARTBEAT_INFO_PARAMETER_H_ +#define NET_DCSCTP_PACKET_PARAMETER_HEARTBEAT_INFO_PARAMETER_H_ +#include <stddef.h> + +#include <cstdint> +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.5 +struct HeartbeatInfoParameterConfig : ParameterConfig { + static constexpr int kType = 1; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class HeartbeatInfoParameter : public Parameter, + public TLVTrait<HeartbeatInfoParameterConfig> { + public: + static constexpr int kType = HeartbeatInfoParameterConfig::kType; + + explicit HeartbeatInfoParameter(rtc::ArrayView<const uint8_t> info) + : info_(info.begin(), info.end()) {} + + static absl::optional<HeartbeatInfoParameter> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + rtc::ArrayView<const uint8_t> info() const { return info_; } + + private: + std::vector<uint8_t> info_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_PARAMETER_HEARTBEAT_INFO_PARAMETER_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/incoming_ssn_reset_request_parameter.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/incoming_ssn_reset_request_parameter.cc new file mode 100644 index 0000000000..6191adfe9d --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/incoming_ssn_reset_request_parameter.cc @@ -0,0 +1,89 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/incoming_ssn_reset_request_parameter.h" + +#include <stddef.h> + +#include <cstdint> +#include <string> +#include <utility> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc6525#section-4.2 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Parameter Type = 14 | Parameter Length = 8 + 2 * N | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Re-configuration Request Sequence Number | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Stream Number 1 (optional) | Stream Number 2 (optional) | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// / ...... / +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Stream Number N-1 (optional) | Stream Number N (optional) | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int IncomingSSNResetRequestParameter::kType; + +absl::optional<IncomingSSNResetRequestParameter> +IncomingSSNResetRequestParameter::Parse(rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + ReconfigRequestSN request_sequence_number(reader->Load32<4>()); + + size_t stream_count = reader->variable_data_size() / kStreamIdSize; + std::vector<StreamID> stream_ids; + stream_ids.reserve(stream_count); + for (size_t i = 0; i < stream_count; ++i) { + BoundedByteReader<kStreamIdSize> sub_reader = + reader->sub_reader<kStreamIdSize>(i * kStreamIdSize); + + stream_ids.push_back(StreamID(sub_reader.Load16<0>())); + } + + return IncomingSSNResetRequestParameter(request_sequence_number, + std::move(stream_ids)); +} + +void IncomingSSNResetRequestParameter::SerializeTo( + std::vector<uint8_t>& out) const { + size_t variable_size = stream_ids_.size() * kStreamIdSize; + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, variable_size); + + writer.Store32<4>(*request_sequence_number_); + + for (size_t i = 0; i < stream_ids_.size(); ++i) { + BoundedByteWriter<kStreamIdSize> sub_writer = + writer.sub_writer<kStreamIdSize>(i * kStreamIdSize); + sub_writer.Store16<0>(*stream_ids_[i]); + } +} + +std::string IncomingSSNResetRequestParameter::ToString() const { + rtc::StringBuilder sb; + sb << "Incoming SSN Reset Request, req_seq_nbr=" + << *request_sequence_number(); + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/incoming_ssn_reset_request_parameter.h b/third_party/libwebrtc/net/dcsctp/packet/parameter/incoming_ssn_reset_request_parameter.h new file mode 100644 index 0000000000..18963efafc --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/incoming_ssn_reset_request_parameter.h @@ -0,0 +1,66 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_PARAMETER_INCOMING_SSN_RESET_REQUEST_PARAMETER_H_ +#define NET_DCSCTP_PACKET_PARAMETER_INCOMING_SSN_RESET_REQUEST_PARAMETER_H_ +#include <stddef.h> + +#include <cstdint> +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/common/internal_types.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/public/types.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc6525#section-4.2 +struct IncomingSSNResetRequestParameterConfig : ParameterConfig { + static constexpr int kType = 14; + static constexpr size_t kHeaderSize = 8; + static constexpr size_t kVariableLengthAlignment = 2; +}; + +class IncomingSSNResetRequestParameter + : public Parameter, + public TLVTrait<IncomingSSNResetRequestParameterConfig> { + public: + static constexpr int kType = IncomingSSNResetRequestParameterConfig::kType; + + explicit IncomingSSNResetRequestParameter( + ReconfigRequestSN request_sequence_number, + std::vector<StreamID> stream_ids) + : request_sequence_number_(request_sequence_number), + stream_ids_(std::move(stream_ids)) {} + + static absl::optional<IncomingSSNResetRequestParameter> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + ReconfigRequestSN request_sequence_number() const { + return request_sequence_number_; + } + rtc::ArrayView<const StreamID> stream_ids() const { return stream_ids_; } + + private: + static constexpr size_t kStreamIdSize = sizeof(uint16_t); + + ReconfigRequestSN request_sequence_number_; + std::vector<StreamID> stream_ids_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_PARAMETER_INCOMING_SSN_RESET_REQUEST_PARAMETER_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/incoming_ssn_reset_request_parameter_test.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/incoming_ssn_reset_request_parameter_test.cc new file mode 100644 index 0000000000..17793f6638 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/incoming_ssn_reset_request_parameter_test.cc @@ -0,0 +1,42 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/incoming_ssn_reset_request_parameter.h" + +#include <cstdint> +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(IncomingSSNResetRequestParameterTest, SerializeAndDeserialize) { + IncomingSSNResetRequestParameter parameter( + ReconfigRequestSN(1), {StreamID(2), StreamID(3), StreamID(4)}); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN( + IncomingSSNResetRequestParameter deserialized, + IncomingSSNResetRequestParameter::Parse(serialized)); + + EXPECT_EQ(*deserialized.request_sequence_number(), 1u); + EXPECT_THAT(deserialized.stream_ids(), + ElementsAre(StreamID(2), StreamID(3), StreamID(4))); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/outgoing_ssn_reset_request_parameter.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/outgoing_ssn_reset_request_parameter.cc new file mode 100644 index 0000000000..c25a2426be --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/outgoing_ssn_reset_request_parameter.cc @@ -0,0 +1,101 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/outgoing_ssn_reset_request_parameter.h" + +#include <stddef.h> + +#include <cstdint> +#include <string> +#include <utility> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/common/internal_types.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "net/dcsctp/public/types.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc6525#section-4.1 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Parameter Type = 13 | Parameter Length = 16 + 2 * N | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Re-configuration Request Sequence Number | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Re-configuration Response Sequence Number | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Sender's Last Assigned TSN | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Stream Number 1 (optional) | Stream Number 2 (optional) | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// / ...... / +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Stream Number N-1 (optional) | Stream Number N (optional) | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int OutgoingSSNResetRequestParameter::kType; + +absl::optional<OutgoingSSNResetRequestParameter> +OutgoingSSNResetRequestParameter::Parse(rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + ReconfigRequestSN request_sequence_number(reader->Load32<4>()); + ReconfigRequestSN response_sequence_number(reader->Load32<8>()); + TSN sender_last_assigned_tsn(reader->Load32<12>()); + + size_t stream_count = reader->variable_data_size() / kStreamIdSize; + std::vector<StreamID> stream_ids; + stream_ids.reserve(stream_count); + for (size_t i = 0; i < stream_count; ++i) { + BoundedByteReader<kStreamIdSize> sub_reader = + reader->sub_reader<kStreamIdSize>(i * kStreamIdSize); + + stream_ids.push_back(StreamID(sub_reader.Load16<0>())); + } + + return OutgoingSSNResetRequestParameter( + request_sequence_number, response_sequence_number, + sender_last_assigned_tsn, std::move(stream_ids)); +} + +void OutgoingSSNResetRequestParameter::SerializeTo( + std::vector<uint8_t>& out) const { + size_t variable_size = stream_ids_.size() * kStreamIdSize; + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, variable_size); + + writer.Store32<4>(*request_sequence_number_); + writer.Store32<8>(*response_sequence_number_); + writer.Store32<12>(*sender_last_assigned_tsn_); + + for (size_t i = 0; i < stream_ids_.size(); ++i) { + BoundedByteWriter<kStreamIdSize> sub_writer = + writer.sub_writer<kStreamIdSize>(i * kStreamIdSize); + sub_writer.Store16<0>(*stream_ids_[i]); + } +} + +std::string OutgoingSSNResetRequestParameter::ToString() const { + rtc::StringBuilder sb; + sb << "Outgoing SSN Reset Request, req_seq_nbr=" << *request_sequence_number() + << ", resp_seq_nbr=" << *response_sequence_number() + << ", sender_last_asg_tsn=" << *sender_last_assigned_tsn(); + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/outgoing_ssn_reset_request_parameter.h b/third_party/libwebrtc/net/dcsctp/packet/parameter/outgoing_ssn_reset_request_parameter.h new file mode 100644 index 0000000000..6eb44e079f --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/outgoing_ssn_reset_request_parameter.h @@ -0,0 +1,78 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_PARAMETER_OUTGOING_SSN_RESET_REQUEST_PARAMETER_H_ +#define NET_DCSCTP_PACKET_PARAMETER_OUTGOING_SSN_RESET_REQUEST_PARAMETER_H_ +#include <stddef.h> +#include <stdint.h> + +#include <cstdint> +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/common/internal_types.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "net/dcsctp/public/types.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc6525#section-4.1 +struct OutgoingSSNResetRequestParameterConfig : ParameterConfig { + static constexpr int kType = 13; + static constexpr size_t kHeaderSize = 16; + static constexpr size_t kVariableLengthAlignment = 2; +}; + +class OutgoingSSNResetRequestParameter + : public Parameter, + public TLVTrait<OutgoingSSNResetRequestParameterConfig> { + public: + static constexpr int kType = OutgoingSSNResetRequestParameterConfig::kType; + + explicit OutgoingSSNResetRequestParameter( + ReconfigRequestSN request_sequence_number, + ReconfigRequestSN response_sequence_number, + TSN sender_last_assigned_tsn, + std::vector<StreamID> stream_ids) + : request_sequence_number_(request_sequence_number), + response_sequence_number_(response_sequence_number), + sender_last_assigned_tsn_(sender_last_assigned_tsn), + stream_ids_(std::move(stream_ids)) {} + + static absl::optional<OutgoingSSNResetRequestParameter> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + ReconfigRequestSN request_sequence_number() const { + return request_sequence_number_; + } + ReconfigRequestSN response_sequence_number() const { + return response_sequence_number_; + } + TSN sender_last_assigned_tsn() const { return sender_last_assigned_tsn_; } + rtc::ArrayView<const StreamID> stream_ids() const { return stream_ids_; } + + private: + static constexpr size_t kStreamIdSize = sizeof(uint16_t); + + ReconfigRequestSN request_sequence_number_; + ReconfigRequestSN response_sequence_number_; + TSN sender_last_assigned_tsn_; + std::vector<StreamID> stream_ids_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_PARAMETER_OUTGOING_SSN_RESET_REQUEST_PARAMETER_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/outgoing_ssn_reset_request_parameter_test.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/outgoing_ssn_reset_request_parameter_test.cc new file mode 100644 index 0000000000..dae73c2fba --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/outgoing_ssn_reset_request_parameter_test.cc @@ -0,0 +1,47 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/outgoing_ssn_reset_request_parameter.h" + +#include <cstdint> +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/common/internal_types.h" +#include "net/dcsctp/public/types.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(OutgoingSSNResetRequestParameterTest, SerializeAndDeserialize) { + OutgoingSSNResetRequestParameter parameter( + ReconfigRequestSN(1), ReconfigRequestSN(2), TSN(3), + {StreamID(4), StreamID(5), StreamID(6)}); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN( + OutgoingSSNResetRequestParameter deserialized, + OutgoingSSNResetRequestParameter::Parse(serialized)); + + EXPECT_EQ(*deserialized.request_sequence_number(), 1u); + EXPECT_EQ(*deserialized.response_sequence_number(), 2u); + EXPECT_EQ(*deserialized.sender_last_assigned_tsn(), 3u); + EXPECT_THAT(deserialized.stream_ids(), + ElementsAre(StreamID(4), StreamID(5), StreamID(6))); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/parameter.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/parameter.cc new file mode 100644 index 0000000000..b3b2bffef7 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/parameter.cc @@ -0,0 +1,96 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/parameter.h" + +#include <stddef.h> + +#include <cstdint> +#include <memory> +#include <string> +#include <utility> +#include <vector> + +#include "absl/memory/memory.h" +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/common/math.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/parameter/add_incoming_streams_request_parameter.h" +#include "net/dcsctp/packet/parameter/add_outgoing_streams_request_parameter.h" +#include "net/dcsctp/packet/parameter/forward_tsn_supported_parameter.h" +#include "net/dcsctp/packet/parameter/heartbeat_info_parameter.h" +#include "net/dcsctp/packet/parameter/incoming_ssn_reset_request_parameter.h" +#include "net/dcsctp/packet/parameter/outgoing_ssn_reset_request_parameter.h" +#include "net/dcsctp/packet/parameter/reconfiguration_response_parameter.h" +#include "net/dcsctp/packet/parameter/ssn_tsn_reset_request_parameter.h" +#include "net/dcsctp/packet/parameter/state_cookie_parameter.h" +#include "net/dcsctp/packet/parameter/supported_extensions_parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/logging.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +constexpr size_t kParameterHeaderSize = 4; + +Parameters::Builder& Parameters::Builder::Add(const Parameter& p) { + // https://tools.ietf.org/html/rfc4960#section-3.2.1 + // "If the length of the parameter is not a multiple of 4 bytes, the sender + // pads the parameter at the end (i.e., after the Parameter Value field) with + // all zero bytes." + if (data_.size() % 4 != 0) { + data_.resize(RoundUpTo4(data_.size())); + } + + p.SerializeTo(data_); + return *this; +} + +std::vector<ParameterDescriptor> Parameters::descriptors() const { + rtc::ArrayView<const uint8_t> span(data_); + std::vector<ParameterDescriptor> result; + while (!span.empty()) { + BoundedByteReader<kParameterHeaderSize> header(span); + uint16_t type = header.Load16<0>(); + uint16_t length = header.Load16<2>(); + result.emplace_back(type, span.subview(0, length)); + size_t length_with_padding = RoundUpTo4(length); + if (length_with_padding > span.size()) { + break; + } + span = span.subview(length_with_padding); + } + return result; +} + +absl::optional<Parameters> Parameters::Parse( + rtc::ArrayView<const uint8_t> data) { + // Validate the parameter descriptors + rtc::ArrayView<const uint8_t> span(data); + while (!span.empty()) { + if (span.size() < kParameterHeaderSize) { + RTC_DLOG(LS_WARNING) << "Insufficient parameter length"; + return absl::nullopt; + } + BoundedByteReader<kParameterHeaderSize> header(span); + uint16_t length = header.Load16<2>(); + if (length < kParameterHeaderSize || length > span.size()) { + RTC_DLOG(LS_WARNING) << "Invalid parameter length field"; + return absl::nullopt; + } + size_t length_with_padding = RoundUpTo4(length); + if (length_with_padding > span.size()) { + break; + } + span = span.subview(length_with_padding); + } + return Parameters(std::vector<uint8_t>(data.begin(), data.end())); +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/parameter.h b/third_party/libwebrtc/net/dcsctp/packet/parameter/parameter.h new file mode 100644 index 0000000000..e8fa67c8f7 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/parameter.h @@ -0,0 +1,96 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_PARAMETER_PARAMETER_H_ +#define NET_DCSCTP_PACKET_PARAMETER_PARAMETER_H_ + +#include <stddef.h> + +#include <algorithm> +#include <cstdint> +#include <iterator> +#include <memory> +#include <string> +#include <type_traits> +#include <utility> +#include <vector> + +#include "absl/algorithm/container.h" +#include "absl/strings/string_view.h" +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +class Parameter { + public: + Parameter() {} + virtual ~Parameter() = default; + + Parameter(const Parameter& other) = default; + Parameter& operator=(const Parameter& other) = default; + + virtual void SerializeTo(std::vector<uint8_t>& out) const = 0; + virtual std::string ToString() const = 0; +}; + +struct ParameterDescriptor { + ParameterDescriptor(uint16_t type, rtc::ArrayView<const uint8_t> data) + : type(type), data(data) {} + uint16_t type; + rtc::ArrayView<const uint8_t> data; +}; + +class Parameters { + public: + class Builder { + public: + Builder() {} + Builder& Add(const Parameter& p); + Parameters Build() { return Parameters(std::move(data_)); } + + private: + std::vector<uint8_t> data_; + }; + + static absl::optional<Parameters> Parse(rtc::ArrayView<const uint8_t> data); + + Parameters() {} + Parameters(Parameters&& other) = default; + Parameters& operator=(Parameters&& other) = default; + + rtc::ArrayView<const uint8_t> data() const { return data_; } + std::vector<ParameterDescriptor> descriptors() const; + + template <typename P> + absl::optional<P> get() const { + static_assert(std::is_base_of<Parameter, P>::value, + "Template parameter not derived from Parameter"); + for (const auto& p : descriptors()) { + if (p.type == P::kType) { + return P::Parse(p.data); + } + } + return absl::nullopt; + } + + private: + explicit Parameters(std::vector<uint8_t> data) : data_(std::move(data)) {} + std::vector<uint8_t> data_; +}; + +struct ParameterConfig { + static constexpr int kTypeSizeInBytes = 2; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_PARAMETER_PARAMETER_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/parameter_test.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/parameter_test.cc new file mode 100644 index 0000000000..467e324592 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/parameter_test.cc @@ -0,0 +1,53 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/parameter.h" + +#include <cstdint> +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/packet/parameter/outgoing_ssn_reset_request_parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; +using ::testing::SizeIs; + +TEST(ParameterTest, SerializeDeserializeParameter) { + Parameters parameters = + Parameters::Builder() + .Add(OutgoingSSNResetRequestParameter(ReconfigRequestSN(123), + ReconfigRequestSN(456), + TSN(789), {StreamID(42)})) + .Build(); + + rtc::ArrayView<const uint8_t> serialized = parameters.data(); + + ASSERT_HAS_VALUE_AND_ASSIGN(Parameters parsed, Parameters::Parse(serialized)); + auto descriptors = parsed.descriptors(); + ASSERT_THAT(descriptors, SizeIs(1)); + EXPECT_THAT(descriptors[0].type, OutgoingSSNResetRequestParameter::kType); + + ASSERT_HAS_VALUE_AND_ASSIGN( + OutgoingSSNResetRequestParameter parsed_param, + OutgoingSSNResetRequestParameter::Parse(descriptors[0].data)); + EXPECT_EQ(*parsed_param.request_sequence_number(), 123u); + EXPECT_EQ(*parsed_param.response_sequence_number(), 456u); + EXPECT_EQ(*parsed_param.sender_last_assigned_tsn(), 789u); + EXPECT_THAT(parsed_param.stream_ids(), ElementsAre(StreamID(42))); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/reconfiguration_response_parameter.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/reconfiguration_response_parameter.cc new file mode 100644 index 0000000000..fafb204acc --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/reconfiguration_response_parameter.cc @@ -0,0 +1,152 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/reconfiguration_response_parameter.h" + +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <type_traits> +#include <vector> + +#include "absl/strings/string_view.h" +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/logging.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc6525#section-4.4 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Parameter Type = 16 | Parameter Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Re-configuration Response Sequence Number | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Result | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Sender's Next TSN (optional) | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Receiver's Next TSN (optional) | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int ReconfigurationResponseParameter::kType; + +absl::string_view ToString(ReconfigurationResponseParameter::Result result) { + switch (result) { + case ReconfigurationResponseParameter::Result::kSuccessNothingToDo: + return "Success: nothing to do"; + case ReconfigurationResponseParameter::Result::kSuccessPerformed: + return "Success: performed"; + case ReconfigurationResponseParameter::Result::kDenied: + return "Denied"; + case ReconfigurationResponseParameter::Result::kErrorWrongSSN: + return "Error: wrong ssn"; + case ReconfigurationResponseParameter::Result:: + kErrorRequestAlreadyInProgress: + return "Error: request already in progress"; + case ReconfigurationResponseParameter::Result::kErrorBadSequenceNumber: + return "Error: bad sequence number"; + case ReconfigurationResponseParameter::Result::kInProgress: + return "In progress"; + } +} + +absl::optional<ReconfigurationResponseParameter> +ReconfigurationResponseParameter::Parse(rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + ReconfigRequestSN response_sequence_number(reader->Load32<4>()); + Result result; + uint32_t result_nbr = reader->Load32<8>(); + switch (result_nbr) { + case 0: + result = ReconfigurationResponseParameter::Result::kSuccessNothingToDo; + break; + case 1: + result = ReconfigurationResponseParameter::Result::kSuccessPerformed; + break; + case 2: + result = ReconfigurationResponseParameter::Result::kDenied; + break; + case 3: + result = ReconfigurationResponseParameter::Result::kErrorWrongSSN; + break; + case 4: + result = ReconfigurationResponseParameter::Result:: + kErrorRequestAlreadyInProgress; + break; + case 5: + result = + ReconfigurationResponseParameter::Result::kErrorBadSequenceNumber; + break; + case 6: + result = ReconfigurationResponseParameter::Result::kInProgress; + break; + default: + RTC_DLOG(LS_WARNING) << "Invalid reconfig response result: " + << result_nbr; + return absl::nullopt; + } + + if (reader->variable_data().empty()) { + return ReconfigurationResponseParameter(response_sequence_number, result); + } else if (reader->variable_data_size() != kNextTsnHeaderSize) { + RTC_DLOG(LS_WARNING) << "Invalid parameter size"; + return absl::nullopt; + } + + BoundedByteReader<kNextTsnHeaderSize> sub_reader = + reader->sub_reader<kNextTsnHeaderSize>(0); + + TSN sender_next_tsn(sub_reader.Load32<0>()); + TSN receiver_next_tsn(sub_reader.Load32<4>()); + + return ReconfigurationResponseParameter(response_sequence_number, result, + sender_next_tsn, receiver_next_tsn); +} + +void ReconfigurationResponseParameter::SerializeTo( + std::vector<uint8_t>& out) const { + size_t variable_size = + (sender_next_tsn().has_value() ? kNextTsnHeaderSize : 0); + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, variable_size); + + writer.Store32<4>(*response_sequence_number_); + uint32_t result_nbr = + static_cast<std::underlying_type<Result>::type>(result_); + writer.Store32<8>(result_nbr); + + if (sender_next_tsn().has_value()) { + BoundedByteWriter<kNextTsnHeaderSize> sub_writer = + writer.sub_writer<kNextTsnHeaderSize>(0); + + sub_writer.Store32<0>(sender_next_tsn_.has_value() ? **sender_next_tsn_ + : 0); + sub_writer.Store32<4>(receiver_next_tsn_.has_value() ? **receiver_next_tsn_ + : 0); + } +} + +std::string ReconfigurationResponseParameter::ToString() const { + rtc::StringBuilder sb; + sb << "Re-configuration Response, resp_seq_nbr=" + << *response_sequence_number(); + return sb.Release(); +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/reconfiguration_response_parameter.h b/third_party/libwebrtc/net/dcsctp/packet/parameter/reconfiguration_response_parameter.h new file mode 100644 index 0000000000..c5a68acb33 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/reconfiguration_response_parameter.h @@ -0,0 +1,92 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_PARAMETER_RECONFIGURATION_RESPONSE_PARAMETER_H_ +#define NET_DCSCTP_PACKET_PARAMETER_RECONFIGURATION_RESPONSE_PARAMETER_H_ +#include <stddef.h> + +#include <cstdint> +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/common/internal_types.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc6525#section-4.4 +struct ReconfigurationResponseParameterConfig : ParameterConfig { + static constexpr int kType = 16; + static constexpr size_t kHeaderSize = 12; + static constexpr size_t kVariableLengthAlignment = 4; +}; + +class ReconfigurationResponseParameter + : public Parameter, + public TLVTrait<ReconfigurationResponseParameterConfig> { + public: + static constexpr int kType = ReconfigurationResponseParameterConfig::kType; + + enum class Result { + kSuccessNothingToDo = 0, + kSuccessPerformed = 1, + kDenied = 2, + kErrorWrongSSN = 3, + kErrorRequestAlreadyInProgress = 4, + kErrorBadSequenceNumber = 5, + kInProgress = 6, + }; + + ReconfigurationResponseParameter(ReconfigRequestSN response_sequence_number, + Result result) + : response_sequence_number_(response_sequence_number), + result_(result), + sender_next_tsn_(absl::nullopt), + receiver_next_tsn_(absl::nullopt) {} + + explicit ReconfigurationResponseParameter( + ReconfigRequestSN response_sequence_number, + Result result, + TSN sender_next_tsn, + TSN receiver_next_tsn) + : response_sequence_number_(response_sequence_number), + result_(result), + sender_next_tsn_(sender_next_tsn), + receiver_next_tsn_(receiver_next_tsn) {} + + static absl::optional<ReconfigurationResponseParameter> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + ReconfigRequestSN response_sequence_number() const { + return response_sequence_number_; + } + Result result() const { return result_; } + absl::optional<TSN> sender_next_tsn() const { return sender_next_tsn_; } + absl::optional<TSN> receiver_next_tsn() const { return receiver_next_tsn_; } + + private: + static constexpr size_t kNextTsnHeaderSize = 8; + ReconfigRequestSN response_sequence_number_; + Result result_; + absl::optional<TSN> sender_next_tsn_; + absl::optional<TSN> receiver_next_tsn_; +}; + +absl::string_view ToString(ReconfigurationResponseParameter::Result result); + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_PARAMETER_RECONFIGURATION_RESPONSE_PARAMETER_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/reconfiguration_response_parameter_test.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/reconfiguration_response_parameter_test.cc new file mode 100644 index 0000000000..8125d93cd0 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/reconfiguration_response_parameter_test.cc @@ -0,0 +1,68 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/reconfiguration_response_parameter.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { + +TEST(ReconfigurationResponseParameterTest, SerializeAndDeserializeFirstForm) { + ReconfigurationResponseParameter parameter( + ReconfigRequestSN(1), + ReconfigurationResponseParameter::Result::kSuccessPerformed); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN( + ReconfigurationResponseParameter deserialized, + ReconfigurationResponseParameter::Parse(serialized)); + + EXPECT_EQ(*deserialized.response_sequence_number(), 1u); + EXPECT_EQ(deserialized.result(), + ReconfigurationResponseParameter::Result::kSuccessPerformed); + EXPECT_EQ(deserialized.sender_next_tsn(), absl::nullopt); + EXPECT_EQ(deserialized.receiver_next_tsn(), absl::nullopt); +} + +TEST(ReconfigurationResponseParameterTest, + SerializeAndDeserializeFirstFormSecondForm) { + ReconfigurationResponseParameter parameter( + ReconfigRequestSN(1), + ReconfigurationResponseParameter::Result::kSuccessPerformed, TSN(2), + TSN(3)); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN( + ReconfigurationResponseParameter deserialized, + ReconfigurationResponseParameter::Parse(serialized)); + + EXPECT_EQ(*deserialized.response_sequence_number(), 1u); + EXPECT_EQ(deserialized.result(), + ReconfigurationResponseParameter::Result::kSuccessPerformed); + EXPECT_TRUE(deserialized.sender_next_tsn().has_value()); + EXPECT_EQ(**deserialized.sender_next_tsn(), 2u); + EXPECT_TRUE(deserialized.receiver_next_tsn().has_value()); + EXPECT_EQ(**deserialized.receiver_next_tsn(), 3u); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/ssn_tsn_reset_request_parameter.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/ssn_tsn_reset_request_parameter.cc new file mode 100644 index 0000000000..d656e0db8f --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/ssn_tsn_reset_request_parameter.cc @@ -0,0 +1,60 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/ssn_tsn_reset_request_parameter.h" + +#include <stdint.h> + +#include <string> +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc6525#section-4.3 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Parameter Type = 15 | Parameter Length = 8 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Re-configuration Request Sequence Number | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int SSNTSNResetRequestParameter::kType; + +absl::optional<SSNTSNResetRequestParameter> SSNTSNResetRequestParameter::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + ReconfigRequestSN request_sequence_number(reader->Load32<4>()); + + return SSNTSNResetRequestParameter(request_sequence_number); +} + +void SSNTSNResetRequestParameter::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out); + writer.Store32<4>(*request_sequence_number_); +} + +std::string SSNTSNResetRequestParameter::ToString() const { + rtc::StringBuilder sb; + sb << "SSN/TSN Reset Request, req_seq_nbr=" << *request_sequence_number(); + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/ssn_tsn_reset_request_parameter.h b/third_party/libwebrtc/net/dcsctp/packet/parameter/ssn_tsn_reset_request_parameter.h new file mode 100644 index 0000000000..e31d7ebe8f --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/ssn_tsn_reset_request_parameter.h @@ -0,0 +1,59 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_PARAMETER_SSN_TSN_RESET_REQUEST_PARAMETER_H_ +#define NET_DCSCTP_PACKET_PARAMETER_SSN_TSN_RESET_REQUEST_PARAMETER_H_ +#include <stddef.h> +#include <stdint.h> + +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/common/internal_types.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc6525#section-4.3 +struct SSNTSNResetRequestParameterConfig : ParameterConfig { + static constexpr int kType = 15; + static constexpr size_t kHeaderSize = 8; + static constexpr size_t kVariableLengthAlignment = 0; +}; + +class SSNTSNResetRequestParameter + : public Parameter, + public TLVTrait<SSNTSNResetRequestParameterConfig> { + public: + static constexpr int kType = SSNTSNResetRequestParameterConfig::kType; + + explicit SSNTSNResetRequestParameter( + ReconfigRequestSN request_sequence_number) + : request_sequence_number_(request_sequence_number) {} + + static absl::optional<SSNTSNResetRequestParameter> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + ReconfigRequestSN request_sequence_number() const { + return request_sequence_number_; + } + + private: + ReconfigRequestSN request_sequence_number_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_PARAMETER_SSN_TSN_RESET_REQUEST_PARAMETER_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/ssn_tsn_reset_request_parameter_test.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/ssn_tsn_reset_request_parameter_test.cc new file mode 100644 index 0000000000..eeb973cbcb --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/ssn_tsn_reset_request_parameter_test.cc @@ -0,0 +1,37 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/ssn_tsn_reset_request_parameter.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { + +TEST(SSNTSNResetRequestParameterTest, SerializeAndDeserialize) { + SSNTSNResetRequestParameter parameter(ReconfigRequestSN(1)); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(SSNTSNResetRequestParameter deserialized, + SSNTSNResetRequestParameter::Parse(serialized)); + + EXPECT_EQ(*deserialized.request_sequence_number(), 1u); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/state_cookie_parameter.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/state_cookie_parameter.cc new file mode 100644 index 0000000000..9777aa6667 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/state_cookie_parameter.cc @@ -0,0 +1,51 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/state_cookie_parameter.h" + +#include <stdint.h> + +#include <string> +#include <type_traits> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.3.1 + +constexpr int StateCookieParameter::kType; + +absl::optional<StateCookieParameter> StateCookieParameter::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + return StateCookieParameter(reader->variable_data()); +} + +void StateCookieParameter::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, data_.size()); + writer.CopyToVariableData(data_); +} + +std::string StateCookieParameter::ToString() const { + rtc::StringBuilder sb; + sb << "State Cookie parameter (cookie_length=" << data_.size() << ")"; + return sb.Release(); +} + +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/state_cookie_parameter.h b/third_party/libwebrtc/net/dcsctp/packet/parameter/state_cookie_parameter.h new file mode 100644 index 0000000000..f4355495e2 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/state_cookie_parameter.h @@ -0,0 +1,55 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_PARAMETER_STATE_COOKIE_PARAMETER_H_ +#define NET_DCSCTP_PACKET_PARAMETER_STATE_COOKIE_PARAMETER_H_ +#include <stddef.h> +#include <stdint.h> + +#include <cstdint> +#include <string> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.3.1 +struct StateCookieParameterConfig : ParameterConfig { + static constexpr int kType = 7; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class StateCookieParameter : public Parameter, + public TLVTrait<StateCookieParameterConfig> { + public: + static constexpr int kType = StateCookieParameterConfig::kType; + + explicit StateCookieParameter(rtc::ArrayView<const uint8_t> data) + : data_(data.begin(), data.end()) {} + + static absl::optional<StateCookieParameter> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + rtc::ArrayView<const uint8_t> data() const { return data_; } + + private: + std::vector<uint8_t> data_; +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_PARAMETER_STATE_COOKIE_PARAMETER_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/state_cookie_parameter_test.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/state_cookie_parameter_test.cc new file mode 100644 index 0000000000..bcca38b586 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/state_cookie_parameter_test.cc @@ -0,0 +1,40 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/state_cookie_parameter.h" + +#include <stdint.h> + +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(StateCookieParameterTest, SerializeAndDeserialize) { + uint8_t cookie[] = {1, 2, 3}; + StateCookieParameter parameter(cookie); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(StateCookieParameter deserialized, + StateCookieParameter::Parse(serialized)); + + EXPECT_THAT(deserialized.data(), ElementsAre(1, 2, 3)); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/supported_extensions_parameter.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/supported_extensions_parameter.cc new file mode 100644 index 0000000000..6a8fb214de --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/supported_extensions_parameter.cc @@ -0,0 +1,65 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/supported_extensions_parameter.h" + +#include <cstdint> +#include <string> +#include <utility> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/common/str_join.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "rtc_base/strings/string_builder.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc5061#section-4.2.7 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Parameter Type = 0x8008 | Parameter Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | CHUNK TYPE 1 | CHUNK TYPE 2 | CHUNK TYPE 3 | CHUNK TYPE 4 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | .... | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | CHUNK TYPE N | PAD | PAD | PAD | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int SupportedExtensionsParameter::kType; + +absl::optional<SupportedExtensionsParameter> +SupportedExtensionsParameter::Parse(rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + std::vector<uint8_t> chunk_types(reader->variable_data().begin(), + reader->variable_data().end()); + return SupportedExtensionsParameter(std::move(chunk_types)); +} + +void SupportedExtensionsParameter::SerializeTo( + std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, chunk_types_.size()); + writer.CopyToVariableData(chunk_types_); +} + +std::string SupportedExtensionsParameter::ToString() const { + rtc::StringBuilder sb; + sb << "Supported Extensions (" << StrJoin(chunk_types_, ", ") << ")"; + return sb.Release(); +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/supported_extensions_parameter.h b/third_party/libwebrtc/net/dcsctp/packet/parameter/supported_extensions_parameter.h new file mode 100644 index 0000000000..5689fd8035 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/supported_extensions_parameter.h @@ -0,0 +1,62 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_PARAMETER_SUPPORTED_EXTENSIONS_PARAMETER_H_ +#define NET_DCSCTP_PACKET_PARAMETER_SUPPORTED_EXTENSIONS_PARAMETER_H_ +#include <stddef.h> + +#include <algorithm> +#include <cstdint> +#include <iterator> +#include <string> +#include <utility> +#include <vector> + +#include "absl/strings/string_view.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc5061#section-4.2.7 +struct SupportedExtensionsParameterConfig : ParameterConfig { + static constexpr int kType = 0x8008; + static constexpr size_t kHeaderSize = 4; + static constexpr size_t kVariableLengthAlignment = 1; +}; + +class SupportedExtensionsParameter + : public Parameter, + public TLVTrait<SupportedExtensionsParameterConfig> { + public: + static constexpr int kType = SupportedExtensionsParameterConfig::kType; + + explicit SupportedExtensionsParameter(std::vector<uint8_t> chunk_types) + : chunk_types_(std::move(chunk_types)) {} + + static absl::optional<SupportedExtensionsParameter> Parse( + rtc::ArrayView<const uint8_t> data); + + void SerializeTo(std::vector<uint8_t>& out) const override; + std::string ToString() const override; + + bool supports(uint8_t chunk_type) const { + return std::find(chunk_types_.begin(), chunk_types_.end(), chunk_type) != + chunk_types_.end(); + } + + rtc::ArrayView<const uint8_t> chunk_types() const { return chunk_types_; } + + private: + std::vector<uint8_t> chunk_types_; +}; +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_PARAMETER_SUPPORTED_EXTENSIONS_PARAMETER_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/parameter/supported_extensions_parameter_test.cc b/third_party/libwebrtc/net/dcsctp/packet/parameter/supported_extensions_parameter_test.cc new file mode 100644 index 0000000000..c870af2e70 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/parameter/supported_extensions_parameter_test.cc @@ -0,0 +1,42 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/parameter/supported_extensions_parameter.h" + +#include <cstdint> +#include <type_traits> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; + +TEST(SupportedExtensionsParameterTest, SerializeAndDeserialize) { + SupportedExtensionsParameter parameter({1, 2, 3}); + + std::vector<uint8_t> serialized; + parameter.SerializeTo(serialized); + + ASSERT_HAS_VALUE_AND_ASSIGN(SupportedExtensionsParameter deserialized, + SupportedExtensionsParameter::Parse(serialized)); + + EXPECT_THAT(deserialized.chunk_types(), ElementsAre(1, 2, 3)); + EXPECT_TRUE(deserialized.supports(1)); + EXPECT_TRUE(deserialized.supports(2)); + EXPECT_TRUE(deserialized.supports(3)); + EXPECT_FALSE(deserialized.supports(4)); +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/sctp_packet.cc b/third_party/libwebrtc/net/dcsctp/packet/sctp_packet.cc new file mode 100644 index 0000000000..cc66235122 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/sctp_packet.cc @@ -0,0 +1,184 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/sctp_packet.h" + +#include <stddef.h> + +#include <cstdint> +#include <string> +#include <utility> +#include <vector> + +#include "absl/memory/memory.h" +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/common/math.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/packet/crc32c.h" +#include "net/dcsctp/public/dcsctp_options.h" +#include "rtc_base/logging.h" +#include "rtc_base/strings/string_format.h" + +namespace dcsctp { +namespace { +constexpr size_t kMaxUdpPacketSize = 65535; +constexpr size_t kChunkTlvHeaderSize = 4; +constexpr size_t kExpectedDescriptorCount = 4; +} // namespace + +/* + 0 1 2 3 + 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | Source Port Number | Destination Port Number | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | Verification Tag | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | Checksum | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +*/ + +SctpPacket::Builder::Builder(VerificationTag verification_tag, + const DcSctpOptions& options) + : verification_tag_(verification_tag), + source_port_(options.local_port), + dest_port_(options.remote_port), + max_packet_size_(RoundDownTo4(options.mtu)) {} + +SctpPacket::Builder& SctpPacket::Builder::Add(const Chunk& chunk) { + if (out_.empty()) { + out_.reserve(max_packet_size_); + out_.resize(SctpPacket::kHeaderSize); + BoundedByteWriter<kHeaderSize> buffer(out_); + buffer.Store16<0>(source_port_); + buffer.Store16<2>(dest_port_); + buffer.Store32<4>(*verification_tag_); + // Checksum is at offset 8 - written when calling Build(); + } + RTC_DCHECK(IsDivisibleBy4(out_.size())); + + chunk.SerializeTo(out_); + if (out_.size() % 4 != 0) { + out_.resize(RoundUpTo4(out_.size())); + } + + RTC_DCHECK(out_.size() <= max_packet_size_) + << "Exceeded max size, data=" << out_.size() + << ", max_size=" << max_packet_size_; + return *this; +} + +size_t SctpPacket::Builder::bytes_remaining() const { + if (out_.empty()) { + // The packet header (CommonHeader) hasn't been written yet: + return max_packet_size_ - kHeaderSize; + } else if (out_.size() > max_packet_size_) { + RTC_DCHECK_NOTREACHED() << "Exceeded max size, data=" << out_.size() + << ", max_size=" << max_packet_size_; + return 0; + } + return max_packet_size_ - out_.size(); +} + +std::vector<uint8_t> SctpPacket::Builder::Build() { + std::vector<uint8_t> out; + out_.swap(out); + + if (!out.empty()) { + uint32_t crc = GenerateCrc32C(out); + BoundedByteWriter<kHeaderSize>(out).Store32<8>(crc); + } + + RTC_DCHECK(out.size() <= max_packet_size_) + << "Exceeded max size, data=" << out.size() + << ", max_size=" << max_packet_size_; + + return out; +} + +absl::optional<SctpPacket> SctpPacket::Parse( + rtc::ArrayView<const uint8_t> data, + bool disable_checksum_verification) { + if (data.size() < kHeaderSize + kChunkTlvHeaderSize || + data.size() > kMaxUdpPacketSize) { + RTC_DLOG(LS_WARNING) << "Invalid packet size"; + return absl::nullopt; + } + + BoundedByteReader<kHeaderSize> reader(data); + + CommonHeader common_header; + common_header.source_port = reader.Load16<0>(); + common_header.destination_port = reader.Load16<2>(); + common_header.verification_tag = VerificationTag(reader.Load32<4>()); + common_header.checksum = reader.Load32<8>(); + + // Create a copy of the packet, which will be held by this object. + std::vector<uint8_t> data_copy = + std::vector<uint8_t>(data.begin(), data.end()); + + // Verify the checksum. The checksum field must be zero when that's done. + BoundedByteWriter<kHeaderSize>(data_copy).Store32<8>(0); + uint32_t calculated_checksum = GenerateCrc32C(data_copy); + if (!disable_checksum_verification && + calculated_checksum != common_header.checksum) { + RTC_DLOG(LS_WARNING) << rtc::StringFormat( + "Invalid packet checksum, packet_checksum=0x%08x, " + "calculated_checksum=0x%08x", + common_header.checksum, calculated_checksum); + return absl::nullopt; + } + // Restore the checksum in the header. + BoundedByteWriter<kHeaderSize>(data_copy).Store32<8>(common_header.checksum); + + // Validate and parse the chunk headers in the message. + /* + 0 1 2 3 + 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | Chunk Type | Chunk Flags | Chunk Length | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + */ + + std::vector<ChunkDescriptor> descriptors; + descriptors.reserve(kExpectedDescriptorCount); + rtc::ArrayView<const uint8_t> descriptor_data = + rtc::ArrayView<const uint8_t>(data_copy).subview(kHeaderSize); + while (!descriptor_data.empty()) { + if (descriptor_data.size() < kChunkTlvHeaderSize) { + RTC_DLOG(LS_WARNING) << "Too small chunk"; + return absl::nullopt; + } + BoundedByteReader<kChunkTlvHeaderSize> chunk_header(descriptor_data); + uint8_t type = chunk_header.Load8<0>(); + uint8_t flags = chunk_header.Load8<1>(); + uint16_t length = chunk_header.Load16<2>(); + uint16_t padded_length = RoundUpTo4(length); + if (padded_length > descriptor_data.size()) { + RTC_DLOG(LS_WARNING) << "Too large chunk. length=" << length + << ", remaining=" << descriptor_data.size(); + return absl::nullopt; + } else if (padded_length < kChunkTlvHeaderSize) { + RTC_DLOG(LS_WARNING) << "Too small chunk. length=" << length; + return absl::nullopt; + } + descriptors.emplace_back(type, flags, + descriptor_data.subview(0, padded_length)); + descriptor_data = descriptor_data.subview(padded_length); + } + + // Note that iterators (and pointer) are guaranteed to be stable when moving a + // std::vector, and `descriptors` have pointers to within `data_copy`. + return SctpPacket(common_header, std::move(data_copy), + std::move(descriptors)); +} +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/sctp_packet.h b/third_party/libwebrtc/net/dcsctp/packet/sctp_packet.h new file mode 100644 index 0000000000..4c6234e0c9 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/sctp_packet.h @@ -0,0 +1,121 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_SCTP_PACKET_H_ +#define NET_DCSCTP_PACKET_SCTP_PACKET_H_ + +#include <stddef.h> + +#include <cstdint> +#include <functional> +#include <memory> +#include <utility> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/common/internal_types.h" +#include "net/dcsctp/packet/chunk/chunk.h" +#include "net/dcsctp/public/dcsctp_options.h" + +namespace dcsctp { + +// The "Common Header", which every SCTP packet starts with, and is described in +// https://tools.ietf.org/html/rfc4960#section-3.1. +struct CommonHeader { + uint16_t source_port; + uint16_t destination_port; + VerificationTag verification_tag; + uint32_t checksum; +}; + +// Represents an immutable (received or to-be-sent) SCTP packet. +class SctpPacket { + public: + static constexpr size_t kHeaderSize = 12; + + struct ChunkDescriptor { + ChunkDescriptor(uint8_t type, + uint8_t flags, + rtc::ArrayView<const uint8_t> data) + : type(type), flags(flags), data(data) {} + uint8_t type; + uint8_t flags; + rtc::ArrayView<const uint8_t> data; + }; + + SctpPacket(SctpPacket&& other) = default; + SctpPacket& operator=(SctpPacket&& other) = default; + SctpPacket(const SctpPacket&) = delete; + SctpPacket& operator=(const SctpPacket&) = delete; + + // Used for building SctpPacket, as those are immutable. + class Builder { + public: + Builder(VerificationTag verification_tag, const DcSctpOptions& options); + + Builder(Builder&& other) = default; + Builder& operator=(Builder&& other) = default; + + // Adds a chunk to the to-be-built SCTP packet. + Builder& Add(const Chunk& chunk); + + // The number of bytes remaining in the packet for chunk storage until the + // packet reaches its maximum size. + size_t bytes_remaining() const; + + // Indicates if any packets have been added to the builder. + bool empty() const { return out_.empty(); } + + // Returns the payload of the build SCTP packet. The Builder will be cleared + // after having called this function, and can be used to build a new packet. + std::vector<uint8_t> Build(); + + private: + VerificationTag verification_tag_; + uint16_t source_port_; + uint16_t dest_port_; + // The maximum packet size is always even divisible by four, as chunks are + // always padded to a size even divisible by four. + size_t max_packet_size_; + std::vector<uint8_t> out_; + }; + + // Parses `data` as an SCTP packet and returns it if it validates. + static absl::optional<SctpPacket> Parse( + rtc::ArrayView<const uint8_t> data, + bool disable_checksum_verification = false); + + // Returns the SCTP common header. + const CommonHeader& common_header() const { return common_header_; } + + // Returns the chunks (types and offsets) within the packet. + rtc::ArrayView<const ChunkDescriptor> descriptors() const { + return descriptors_; + } + + private: + SctpPacket(const CommonHeader& common_header, + std::vector<uint8_t> data, + std::vector<ChunkDescriptor> descriptors) + : common_header_(common_header), + data_(std::move(data)), + descriptors_(std::move(descriptors)) {} + + CommonHeader common_header_; + + // As the `descriptors_` refer to offset within data, and since SctpPacket is + // movable, `data` needs to be pointer stable, which it is according to + // http://www.open-std.org/JTC1/SC22/WG21/docs/lwg-active.html#2321 + std::vector<uint8_t> data_; + // The chunks and their offsets within `data_ `. + std::vector<ChunkDescriptor> descriptors_; +}; +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_SCTP_PACKET_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/sctp_packet_test.cc b/third_party/libwebrtc/net/dcsctp/packet/sctp_packet_test.cc new file mode 100644 index 0000000000..7438315eec --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/sctp_packet_test.cc @@ -0,0 +1,342 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/sctp_packet.h" + +#include <cstdint> +#include <utility> +#include <vector> + +#include "api/array_view.h" +#include "net/dcsctp/common/internal_types.h" +#include "net/dcsctp/common/math.h" +#include "net/dcsctp/packet/chunk/abort_chunk.h" +#include "net/dcsctp/packet/chunk/cookie_ack_chunk.h" +#include "net/dcsctp/packet/chunk/data_chunk.h" +#include "net/dcsctp/packet/chunk/init_chunk.h" +#include "net/dcsctp/packet/chunk/sack_chunk.h" +#include "net/dcsctp/packet/error_cause/error_cause.h" +#include "net/dcsctp/packet/error_cause/user_initiated_abort_cause.h" +#include "net/dcsctp/packet/parameter/parameter.h" +#include "net/dcsctp/packet/tlv_trait.h" +#include "net/dcsctp/public/dcsctp_options.h" +#include "net/dcsctp/testing/testing_macros.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::SizeIs; + +constexpr VerificationTag kVerificationTag = VerificationTag(0x12345678); + +TEST(SctpPacketTest, DeserializeSimplePacketFromCapture) { + /* + Stream Control Transmission Protocol, Src Port: 5000 (5000), Dst Port: 5000 + (5000) Source port: 5000 Destination port: 5000 Verification tag: 0x00000000 + [Association index: 1] + Checksum: 0xaa019d33 [unverified] + [Checksum Status: Unverified] + INIT chunk (Outbound streams: 1000, inbound streams: 1000) + Chunk type: INIT (1) + Chunk flags: 0x00 + Chunk length: 90 + Initiate tag: 0x0eddca08 + Advertised receiver window credit (a_rwnd): 131072 + Number of outbound streams: 1000 + Number of inbound streams: 1000 + Initial TSN: 1426601527 + ECN parameter + Parameter type: ECN (0x8000) + Parameter length: 4 + Forward TSN supported parameter + Parameter type: Forward TSN supported (0xc000) + Parameter length: 4 + Supported Extensions parameter (Supported types: FORWARD_TSN, AUTH, + ASCONF, ASCONF_ACK, RE_CONFIG) Parameter type: Supported Extensions + (0x8008) Parameter length: 9 Supported chunk type: FORWARD_TSN (192) Supported + chunk type: AUTH (15) Supported chunk type: ASCONF (193) Supported chunk type: + ASCONF_ACK (128) Supported chunk type: RE_CONFIG (130) Parameter padding: + 000000 Random parameter Parameter type: Random (0x8002) Parameter length: 36 + Random number: c5a86155090e6f420050634cc8d6b908dfd53e17c99cb143… + Requested HMAC Algorithm parameter (Supported HMACs: SHA-1) + Parameter type: Requested HMAC Algorithm (0x8004) + Parameter length: 6 + HMAC identifier: SHA-1 (1) + Parameter padding: 0000 + Authenticated Chunk list parameter (Chunk types to be authenticated: + ASCONF_ACK, ASCONF) Parameter type: Authenticated Chunk list + (0x8003) Parameter length: 6 Chunk type: ASCONF_ACK (128) Chunk type: ASCONF + (193) Chunk padding: 0000 + */ + + uint8_t data[] = { + 0x13, 0x88, 0x13, 0x88, 0x00, 0x00, 0x00, 0x00, 0xaa, 0x01, 0x9d, 0x33, + 0x01, 0x00, 0x00, 0x5a, 0x0e, 0xdd, 0xca, 0x08, 0x00, 0x02, 0x00, 0x00, + 0x03, 0xe8, 0x03, 0xe8, 0x55, 0x08, 0x36, 0x37, 0x80, 0x00, 0x00, 0x04, + 0xc0, 0x00, 0x00, 0x04, 0x80, 0x08, 0x00, 0x09, 0xc0, 0x0f, 0xc1, 0x80, + 0x82, 0x00, 0x00, 0x00, 0x80, 0x02, 0x00, 0x24, 0xc5, 0xa8, 0x61, 0x55, + 0x09, 0x0e, 0x6f, 0x42, 0x00, 0x50, 0x63, 0x4c, 0xc8, 0xd6, 0xb9, 0x08, + 0xdf, 0xd5, 0x3e, 0x17, 0xc9, 0x9c, 0xb1, 0x43, 0x28, 0x4e, 0xaf, 0x64, + 0x68, 0x2a, 0xc2, 0x97, 0x80, 0x04, 0x00, 0x06, 0x00, 0x01, 0x00, 0x00, + 0x80, 0x03, 0x00, 0x06, 0x80, 0xc1, 0x00, 0x00}; + + ASSERT_HAS_VALUE_AND_ASSIGN(SctpPacket packet, SctpPacket::Parse(data)); + EXPECT_EQ(packet.common_header().source_port, 5000); + EXPECT_EQ(packet.common_header().destination_port, 5000); + EXPECT_EQ(packet.common_header().verification_tag, VerificationTag(0)); + EXPECT_EQ(packet.common_header().checksum, 0xaa019d33); + + EXPECT_THAT(packet.descriptors(), SizeIs(1)); + EXPECT_EQ(packet.descriptors()[0].type, InitChunk::kType); + ASSERT_HAS_VALUE_AND_ASSIGN(InitChunk init, + InitChunk::Parse(packet.descriptors()[0].data)); + EXPECT_EQ(init.initial_tsn(), TSN(1426601527)); +} + +TEST(SctpPacketTest, DeserializePacketWithTwoChunks) { + /* + Stream Control Transmission Protocol, Src Port: 1234 (1234), + Dst Port: 4321 (4321) + Source port: 1234 + Destination port: 4321 + Verification tag: 0x697e3a4e + [Association index: 3] + Checksum: 0xc06e8b36 [unverified] + [Checksum Status: Unverified] + COOKIE_ACK chunk + Chunk type: COOKIE_ACK (11) + Chunk flags: 0x00 + Chunk length: 4 + SACK chunk (Cumulative TSN: 2930332242, a_rwnd: 131072, + gaps: 0, duplicate TSNs: 0) + Chunk type: SACK (3) + Chunk flags: 0x00 + Chunk length: 16 + Cumulative TSN ACK: 2930332242 + Advertised receiver window credit (a_rwnd): 131072 + Number of gap acknowledgement blocks: 0 + Number of duplicated TSNs: 0 + */ + + uint8_t data[] = {0x04, 0xd2, 0x10, 0xe1, 0x69, 0x7e, 0x3a, 0x4e, + 0xc0, 0x6e, 0x8b, 0x36, 0x0b, 0x00, 0x00, 0x04, + 0x03, 0x00, 0x00, 0x10, 0xae, 0xa9, 0x52, 0x52, + 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; + + ASSERT_HAS_VALUE_AND_ASSIGN(SctpPacket packet, SctpPacket::Parse(data)); + EXPECT_EQ(packet.common_header().source_port, 1234); + EXPECT_EQ(packet.common_header().destination_port, 4321); + EXPECT_EQ(packet.common_header().verification_tag, + VerificationTag(0x697e3a4eu)); + EXPECT_EQ(packet.common_header().checksum, 0xc06e8b36u); + + EXPECT_THAT(packet.descriptors(), SizeIs(2)); + EXPECT_EQ(packet.descriptors()[0].type, CookieAckChunk::kType); + EXPECT_EQ(packet.descriptors()[1].type, SackChunk::kType); + ASSERT_HAS_VALUE_AND_ASSIGN( + CookieAckChunk cookie_ack, + CookieAckChunk::Parse(packet.descriptors()[0].data)); + ASSERT_HAS_VALUE_AND_ASSIGN(SackChunk sack, + SackChunk::Parse(packet.descriptors()[1].data)); +} + +TEST(SctpPacketTest, DeserializePacketWithWrongChecksum) { + /* + Stream Control Transmission Protocol, Src Port: 5000 (5000), + Dst Port: 5000 (5000) + Source port: 5000 + Destination port: 5000 + Verification tag: 0x0eddca08 + [Association index: 1] + Checksum: 0x2a81f531 [unverified] + [Checksum Status: Unverified] + SACK chunk (Cumulative TSN: 1426601536, a_rwnd: 131072, + gaps: 0, duplicate TSNs: 0) + Chunk type: SACK (3) + Chunk flags: 0x00 + Chunk length: 16 + Cumulative TSN ACK: 1426601536 + Advertised receiver window credit (a_rwnd): 131072 + Number of gap acknowledgement blocks: 0 + Number of duplicated TSNs: 0 + */ + + uint8_t data[] = {0x13, 0x88, 0x13, 0x88, 0x0e, 0xdd, 0xca, 0x08, 0x2a, 0x81, + 0xf5, 0x31, 0x03, 0x00, 0x00, 0x10, 0x55, 0x08, 0x36, 0x40, + 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; + + EXPECT_FALSE(SctpPacket::Parse(data).has_value()); +} + +TEST(SctpPacketTest, DeserializePacketDontValidateChecksum) { + /* + Stream Control Transmission Protocol, Src Port: 5000 (5000), + Dst Port: 5000 (5000) + Source port: 5000 + Destination port: 5000 + Verification tag: 0x0eddca08 + [Association index: 1] + Checksum: 0x2a81f531 [unverified] + [Checksum Status: Unverified] + SACK chunk (Cumulative TSN: 1426601536, a_rwnd: 131072, + gaps: 0, duplicate TSNs: 0) + Chunk type: SACK (3) + Chunk flags: 0x00 + Chunk length: 16 + Cumulative TSN ACK: 1426601536 + Advertised receiver window credit (a_rwnd): 131072 + Number of gap acknowledgement blocks: 0 + Number of duplicated TSNs: 0 + */ + + uint8_t data[] = {0x13, 0x88, 0x13, 0x88, 0x0e, 0xdd, 0xca, 0x08, 0x2a, 0x81, + 0xf5, 0x31, 0x03, 0x00, 0x00, 0x10, 0x55, 0x08, 0x36, 0x40, + 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; + + ASSERT_HAS_VALUE_AND_ASSIGN( + SctpPacket packet, + SctpPacket::Parse(data, /*disable_checksum_verification=*/true)); + EXPECT_EQ(packet.common_header().source_port, 5000); + EXPECT_EQ(packet.common_header().destination_port, 5000); + EXPECT_EQ(packet.common_header().verification_tag, + VerificationTag(0x0eddca08u)); + EXPECT_EQ(packet.common_header().checksum, 0x2a81f531u); +} + +TEST(SctpPacketTest, SerializeAndDeserializeSingleChunk) { + SctpPacket::Builder b(kVerificationTag, {}); + InitChunk init(/*initiate_tag=*/VerificationTag(123), /*a_rwnd=*/456, + /*nbr_outbound_streams=*/65535, + /*nbr_inbound_streams=*/65534, /*initial_tsn=*/TSN(789), + /*parameters=*/Parameters()); + + b.Add(init); + std::vector<uint8_t> serialized = b.Build(); + + ASSERT_HAS_VALUE_AND_ASSIGN(SctpPacket packet, SctpPacket::Parse(serialized)); + + EXPECT_EQ(packet.common_header().verification_tag, kVerificationTag); + + ASSERT_THAT(packet.descriptors(), SizeIs(1)); + EXPECT_EQ(packet.descriptors()[0].type, InitChunk::kType); + + ASSERT_HAS_VALUE_AND_ASSIGN(InitChunk deserialized, + InitChunk::Parse(packet.descriptors()[0].data)); + EXPECT_EQ(deserialized.initiate_tag(), VerificationTag(123)); + EXPECT_EQ(deserialized.a_rwnd(), 456u); + EXPECT_EQ(deserialized.nbr_outbound_streams(), 65535u); + EXPECT_EQ(deserialized.nbr_inbound_streams(), 65534u); + EXPECT_EQ(deserialized.initial_tsn(), TSN(789)); +} + +TEST(SctpPacketTest, SerializeAndDeserializeThreeChunks) { + SctpPacket::Builder b(kVerificationTag, {}); + b.Add(SackChunk(/*cumulative_tsn_ack=*/TSN(999), /*a_rwnd=*/456, + {SackChunk::GapAckBlock(2, 3)}, + /*duplicate_tsns=*/{TSN(1), TSN(2), TSN(3)})); + b.Add(DataChunk(TSN(123), StreamID(456), SSN(789), PPID(9090), + /*payload=*/{1, 2, 3, 4, 5}, + /*options=*/{})); + b.Add(DataChunk(TSN(124), StreamID(654), SSN(987), PPID(909), + /*payload=*/{5, 4, 3, 3, 1}, + /*options=*/{})); + + std::vector<uint8_t> serialized = b.Build(); + + ASSERT_HAS_VALUE_AND_ASSIGN(SctpPacket packet, SctpPacket::Parse(serialized)); + + EXPECT_EQ(packet.common_header().verification_tag, kVerificationTag); + + ASSERT_THAT(packet.descriptors(), SizeIs(3)); + EXPECT_EQ(packet.descriptors()[0].type, SackChunk::kType); + EXPECT_EQ(packet.descriptors()[1].type, DataChunk::kType); + EXPECT_EQ(packet.descriptors()[2].type, DataChunk::kType); + + ASSERT_HAS_VALUE_AND_ASSIGN(SackChunk sack, + SackChunk::Parse(packet.descriptors()[0].data)); + EXPECT_EQ(sack.cumulative_tsn_ack(), TSN(999)); + EXPECT_EQ(sack.a_rwnd(), 456u); + + ASSERT_HAS_VALUE_AND_ASSIGN(DataChunk data1, + DataChunk::Parse(packet.descriptors()[1].data)); + EXPECT_EQ(data1.tsn(), TSN(123)); + + ASSERT_HAS_VALUE_AND_ASSIGN(DataChunk data2, + DataChunk::Parse(packet.descriptors()[2].data)); + EXPECT_EQ(data2.tsn(), TSN(124)); +} + +TEST(SctpPacketTest, ParseAbortWithEmptyCause) { + SctpPacket::Builder b(kVerificationTag, {}); + b.Add(AbortChunk( + /*filled_in_verification_tag=*/true, + Parameters::Builder().Add(UserInitiatedAbortCause("")).Build())); + + ASSERT_HAS_VALUE_AND_ASSIGN(SctpPacket packet, SctpPacket::Parse(b.Build())); + + EXPECT_EQ(packet.common_header().verification_tag, kVerificationTag); + + ASSERT_THAT(packet.descriptors(), SizeIs(1)); + EXPECT_EQ(packet.descriptors()[0].type, AbortChunk::kType); + + ASSERT_HAS_VALUE_AND_ASSIGN(AbortChunk abort, + AbortChunk::Parse(packet.descriptors()[0].data)); + ASSERT_HAS_VALUE_AND_ASSIGN( + UserInitiatedAbortCause cause, + abort.error_causes().get<UserInitiatedAbortCause>()); + EXPECT_EQ(cause.upper_layer_abort_reason(), ""); +} + +TEST(SctpPacketTest, DetectPacketWithZeroSizeChunk) { + uint8_t data[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0x0a, 0x0a, 0x0a, 0x5c, + 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x00, 0x00, 0x00}; + + EXPECT_FALSE(SctpPacket::Parse(data, true).has_value()); +} + +TEST(SctpPacketTest, ReturnsCorrectSpaceAvailableToStayWithinMTU) { + DcSctpOptions options; + options.mtu = 1191; + + SctpPacket::Builder builder(VerificationTag(123), options); + + // Chunks will be padded to an even 4 bytes, so the maximum packet size should + // be rounded down. + const size_t kMaxPacketSize = RoundDownTo4(options.mtu); + EXPECT_EQ(kMaxPacketSize, 1188u); + + const size_t kSctpHeaderSize = 12; + EXPECT_EQ(builder.bytes_remaining(), kMaxPacketSize - kSctpHeaderSize); + EXPECT_EQ(builder.bytes_remaining(), 1176u); + + // Add a smaller packet first. + DataChunk::Options data_options; + + std::vector<uint8_t> payload1(183); + builder.Add( + DataChunk(TSN(1), StreamID(1), SSN(0), PPID(53), payload1, data_options)); + + size_t chunk1_size = RoundUpTo4(DataChunk::kHeaderSize + payload1.size()); + EXPECT_EQ(builder.bytes_remaining(), + kMaxPacketSize - kSctpHeaderSize - chunk1_size); + EXPECT_EQ(builder.bytes_remaining(), 976u); // Hand-calculated. + + std::vector<uint8_t> payload2(957); + builder.Add( + DataChunk(TSN(1), StreamID(1), SSN(0), PPID(53), payload2, data_options)); + + size_t chunk2_size = RoundUpTo4(DataChunk::kHeaderSize + payload2.size()); + EXPECT_EQ(builder.bytes_remaining(), + kMaxPacketSize - kSctpHeaderSize - chunk1_size - chunk2_size); + EXPECT_EQ(builder.bytes_remaining(), 0u); // Hand-calculated. +} + +} // namespace +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/tlv_trait.cc b/third_party/libwebrtc/net/dcsctp/packet/tlv_trait.cc new file mode 100644 index 0000000000..493b6a4613 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/tlv_trait.cc @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/tlv_trait.h" + +#include "rtc_base/logging.h" + +namespace dcsctp { +namespace tlv_trait_impl { +void ReportInvalidSize(size_t actual_size, size_t expected_size) { + RTC_DLOG(LS_WARNING) << "Invalid size (" << actual_size + << ", expected minimum " << expected_size << " bytes)"; +} + +void ReportInvalidType(int actual_type, int expected_type) { + RTC_DLOG(LS_WARNING) << "Invalid type (" << actual_type << ", expected " + << expected_type << ")"; +} + +void ReportInvalidFixedLengthField(size_t value, size_t expected) { + RTC_DLOG(LS_WARNING) << "Invalid length field (" << value << ", expected " + << expected << " bytes)"; +} + +void ReportInvalidVariableLengthField(size_t value, size_t available) { + RTC_DLOG(LS_WARNING) << "Invalid length field (" << value << ", available " + << available << " bytes)"; +} + +void ReportInvalidPadding(size_t padding_bytes) { + RTC_DLOG(LS_WARNING) << "Invalid padding (" << padding_bytes << " bytes)"; +} + +void ReportInvalidLengthMultiple(size_t length, size_t alignment) { + RTC_DLOG(LS_WARNING) << "Invalid length field (" << length + << ", expected an even multiple of " << alignment + << " bytes)"; +} +} // namespace tlv_trait_impl +} // namespace dcsctp diff --git a/third_party/libwebrtc/net/dcsctp/packet/tlv_trait.h b/third_party/libwebrtc/net/dcsctp/packet/tlv_trait.h new file mode 100644 index 0000000000..a3c728efd7 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/tlv_trait.h @@ -0,0 +1,165 @@ +/* + * Copyright (c) 2021 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. + */ +#ifndef NET_DCSCTP_PACKET_TLV_TRAIT_H_ +#define NET_DCSCTP_PACKET_TLV_TRAIT_H_ + +#include <stdint.h> +#include <string.h> + +#include <algorithm> +#include <cstddef> +#include <cstdint> +#include <string> +#include <vector> + +#include "absl/types/optional.h" +#include "api/array_view.h" +#include "net/dcsctp/packet/bounded_byte_reader.h" +#include "net/dcsctp/packet/bounded_byte_writer.h" + +namespace dcsctp { +namespace tlv_trait_impl { +// Logging functions, only to be used by TLVTrait, which is a templated class. +void ReportInvalidSize(size_t actual_size, size_t expected_size); +void ReportInvalidType(int actual_type, int expected_type); +void ReportInvalidFixedLengthField(size_t value, size_t expected); +void ReportInvalidVariableLengthField(size_t value, size_t available); +void ReportInvalidPadding(size_t padding_bytes); +void ReportInvalidLengthMultiple(size_t length, size_t alignment); +} // namespace tlv_trait_impl + +// Various entities in SCTP are padded data blocks, with a type and length +// field at fixed offsets, all stored in a 4-byte header. +// +// See e.g. https://tools.ietf.org/html/rfc4960#section-3.2 and +// https://tools.ietf.org/html/rfc4960#section-3.2.1 +// +// These are helper classes for writing and parsing that data, which in SCTP is +// called Type-Length-Value, or TLV. +// +// This templated class is configurable - a struct passed in as template +// parameter with the following expected members: +// * kType - The type field's value +// * kTypeSizeInBytes - The type field's width in bytes. +// Either 1 or 2. +// * kHeaderSize - The fixed size header +// * kVariableLengthAlignment - The size alignment on the variable data. Set +// to zero (0) if no variable data is used. +// +// This class is to be used as a trait +// (https://en.wikipedia.org/wiki/Trait_(computer_programming)) that adds a few +// public and protected members and which a class inherits from when it +// represents a type-length-value object. +template <typename Config> +class TLVTrait { + private: + static constexpr size_t kTlvHeaderSize = 4; + + protected: + static constexpr size_t kHeaderSize = Config::kHeaderSize; + + static_assert(Config::kTypeSizeInBytes == 1 || Config::kTypeSizeInBytes == 2, + "kTypeSizeInBytes must be 1 or 2"); + static_assert(Config::kHeaderSize >= kTlvHeaderSize, + "HeaderSize must be >= 4 bytes"); + static_assert((Config::kHeaderSize % 4 == 0), + "kHeaderSize must be an even multiple of 4 bytes"); + static_assert((Config::kVariableLengthAlignment == 0 || + Config::kVariableLengthAlignment == 1 || + Config::kVariableLengthAlignment == 2 || + Config::kVariableLengthAlignment == 4 || + Config::kVariableLengthAlignment == 8), + "kVariableLengthAlignment must be an allowed value"); + + // Validates the data with regards to size, alignment and type. + // If valid, returns a bounded buffer. + static absl::optional<BoundedByteReader<Config::kHeaderSize>> ParseTLV( + rtc::ArrayView<const uint8_t> data) { + if (data.size() < Config::kHeaderSize) { + tlv_trait_impl::ReportInvalidSize(data.size(), Config::kHeaderSize); + return absl::nullopt; + } + BoundedByteReader<kTlvHeaderSize> tlv_header(data); + + const int type = (Config::kTypeSizeInBytes == 1) + ? tlv_header.template Load8<0>() + : tlv_header.template Load16<0>(); + + if (type != Config::kType) { + tlv_trait_impl::ReportInvalidType(type, Config::kType); + return absl::nullopt; + } + const uint16_t length = tlv_header.template Load16<2>(); + if (Config::kVariableLengthAlignment == 0) { + // Don't expect any variable length data at all. + if (length != Config::kHeaderSize || data.size() != Config::kHeaderSize) { + tlv_trait_impl::ReportInvalidFixedLengthField(length, + Config::kHeaderSize); + return absl::nullopt; + } + } else { + // Expect variable length data - verify its size alignment. + if (length > data.size() || length < Config::kHeaderSize) { + tlv_trait_impl::ReportInvalidVariableLengthField(length, data.size()); + return absl::nullopt; + } + const size_t padding = data.size() - length; + if (padding > 3) { + // https://tools.ietf.org/html/rfc4960#section-3.2 + // "This padding MUST NOT be more than 3 bytes in total" + tlv_trait_impl::ReportInvalidPadding(padding); + return absl::nullopt; + } + if (!ValidateLengthAlignment(length, Config::kVariableLengthAlignment)) { + tlv_trait_impl::ReportInvalidLengthMultiple( + length, Config::kVariableLengthAlignment); + return absl::nullopt; + } + } + return BoundedByteReader<Config::kHeaderSize>(data.subview(0, length)); + } + + // Allocates space for data with a static header size, as defined by + // `Config::kHeaderSize` and a variable footer, as defined by `variable_size` + // (which may be 0) and writes the type and length in the header. + static BoundedByteWriter<Config::kHeaderSize> AllocateTLV( + std::vector<uint8_t>& out, + size_t variable_size = 0) { + const size_t offset = out.size(); + const size_t size = Config::kHeaderSize + variable_size; + out.resize(offset + size); + + BoundedByteWriter<kTlvHeaderSize> tlv_header( + rtc::ArrayView<uint8_t>(out.data() + offset, kTlvHeaderSize)); + if (Config::kTypeSizeInBytes == 1) { + tlv_header.template Store8<0>(static_cast<uint8_t>(Config::kType)); + } else { + tlv_header.template Store16<0>(Config::kType); + } + tlv_header.template Store16<2>(size); + + return BoundedByteWriter<Config::kHeaderSize>( + rtc::ArrayView<uint8_t>(out.data() + offset, size)); + } + + private: + static bool ValidateLengthAlignment(uint16_t length, size_t alignment) { + // This is to avoid MSVC believing there could be a "mod by zero", when it + // certainly can't. + if (alignment == 0) { + return true; + } + return (length % alignment) == 0; + } +}; + +} // namespace dcsctp + +#endif // NET_DCSCTP_PACKET_TLV_TRAIT_H_ diff --git a/third_party/libwebrtc/net/dcsctp/packet/tlv_trait_test.cc b/third_party/libwebrtc/net/dcsctp/packet/tlv_trait_test.cc new file mode 100644 index 0000000000..a0dd1a1136 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/tlv_trait_test.cc @@ -0,0 +1,133 @@ +/* + * Copyright (c) 2021 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 "net/dcsctp/packet/tlv_trait.h" + +#include <vector> + +#include "api/array_view.h" +#include "rtc_base/buffer.h" +#include "rtc_base/checks.h" +#include "rtc_base/gunit.h" +#include "test/gmock.h" + +namespace dcsctp { +namespace { +using ::testing::ElementsAre; +using ::testing::SizeIs; + +struct OneByteTypeConfig { + static constexpr int kTypeSizeInBytes = 1; + static constexpr int kType = 0x49; + static constexpr size_t kHeaderSize = 12; + static constexpr int kVariableLengthAlignment = 4; +}; + +class OneByteChunk : public TLVTrait<OneByteTypeConfig> { + public: + static constexpr size_t kVariableSize = 4; + + void SerializeTo(std::vector<uint8_t>& out) { + BoundedByteWriter<OneByteTypeConfig::kHeaderSize> writer = + AllocateTLV(out, kVariableSize); + writer.Store32<4>(0x01020304); + writer.Store16<8>(0x0506); + writer.Store16<10>(0x0708); + + uint8_t variable_data[kVariableSize] = {0xDE, 0xAD, 0xBE, 0xEF}; + writer.CopyToVariableData(rtc::ArrayView<const uint8_t>(variable_data)); + } + + static absl::optional<BoundedByteReader<OneByteTypeConfig::kHeaderSize>> + Parse(rtc::ArrayView<const uint8_t> data) { + return ParseTLV(data); + } +}; + +TEST(TlvDataTest, CanWriteOneByteTypeTlvs) { + std::vector<uint8_t> out; + OneByteChunk().SerializeTo(out); + + EXPECT_THAT(out, SizeIs(OneByteTypeConfig::kHeaderSize + + OneByteChunk::kVariableSize)); + EXPECT_THAT(out, ElementsAre(0x49, 0x00, 0x00, 0x10, 0x01, 0x02, 0x03, 0x04, + 0x05, 0x06, 0x07, 0x08, 0xDE, 0xAD, 0xBE, 0xEF)); +} + +TEST(TlvDataTest, CanReadOneByteTypeTlvs) { + uint8_t data[] = {0x49, 0x00, 0x00, 0x10, 0x01, 0x02, 0x03, 0x04, + 0x05, 0x06, 0x07, 0x08, 0xDE, 0xAD, 0xBE, 0xEF}; + + absl::optional<BoundedByteReader<OneByteTypeConfig::kHeaderSize>> reader = + OneByteChunk::Parse(data); + ASSERT_TRUE(reader.has_value()); + EXPECT_EQ(reader->Load32<4>(), 0x01020304U); + EXPECT_EQ(reader->Load16<8>(), 0x0506U); + EXPECT_EQ(reader->Load16<10>(), 0x0708U); + EXPECT_THAT(reader->variable_data(), ElementsAre(0xDE, 0xAD, 0xBE, 0xEF)); +} + +struct TwoByteTypeConfig { + static constexpr int kTypeSizeInBytes = 2; + static constexpr int kType = 31337; + static constexpr size_t kHeaderSize = 8; + static constexpr int kVariableLengthAlignment = 2; +}; + +class TwoByteChunk : public TLVTrait<TwoByteTypeConfig> { + public: + static constexpr size_t kVariableSize = 8; + + void SerializeTo(std::vector<uint8_t>& out) { + BoundedByteWriter<TwoByteTypeConfig::kHeaderSize> writer = + AllocateTLV(out, kVariableSize); + writer.Store32<4>(0x01020304U); + + uint8_t variable_data[] = {0x05, 0x06, 0x07, 0x08, 0xDE, 0xAD, 0xBE, 0xEF}; + writer.CopyToVariableData(rtc::ArrayView<const uint8_t>(variable_data)); + } + + static absl::optional<BoundedByteReader<TwoByteTypeConfig::kHeaderSize>> + Parse(rtc::ArrayView<const uint8_t> data) { + return ParseTLV(data); + } +}; + +TEST(TlvDataTest, CanWriteTwoByteTypeTlvs) { + std::vector<uint8_t> out; + + TwoByteChunk().SerializeTo(out); + + EXPECT_THAT(out, SizeIs(TwoByteTypeConfig::kHeaderSize + + TwoByteChunk::kVariableSize)); + EXPECT_THAT(out, ElementsAre(0x7A, 0x69, 0x00, 0x10, 0x01, 0x02, 0x03, 0x04, + 0x05, 0x06, 0x07, 0x08, 0xDE, 0xAD, 0xBE, 0xEF)); +} + +TEST(TlvDataTest, CanReadTwoByteTypeTlvs) { + uint8_t data[] = {0x7A, 0x69, 0x00, 0x10, 0x01, 0x02, 0x03, 0x04, + 0x05, 0x06, 0x07, 0x08, 0xDE, 0xAD, 0xBE, 0xEF}; + + absl::optional<BoundedByteReader<TwoByteTypeConfig::kHeaderSize>> reader = + TwoByteChunk::Parse(data); + EXPECT_TRUE(reader.has_value()); + EXPECT_EQ(reader->Load32<4>(), 0x01020304U); + EXPECT_THAT(reader->variable_data(), + ElementsAre(0x05, 0x06, 0x07, 0x08, 0xDE, 0xAD, 0xBE, 0xEF)); +} + +TEST(TlvDataTest, CanHandleInvalidLengthSmallerThanFixedSize) { + // Has 'length=6', which is below the kHeaderSize of 8. + uint8_t data[] = {0x7A, 0x69, 0x00, 0x06, 0x01, 0x02, 0x03, 0x04}; + + EXPECT_FALSE(TwoByteChunk::Parse(data).has_value()); +} + +} // namespace +} // namespace dcsctp |