| // Copyright (c) 2023 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "quiche/quic/moqt/moqt_framer.h" |
| |
| #include <algorithm> |
| #include <cstddef> |
| #include <cstdint> |
| #include <cstdlib> |
| #include <optional> |
| #include <string> |
| #include <utility> |
| #include <variant> |
| |
| #include "absl/container/fixed_array.h" |
| #include "absl/functional/overload.h" |
| #include "absl/status/status.h" |
| #include "absl/status/statusor.h" |
| #include "absl/strings/string_view.h" |
| #include "absl/types/span.h" |
| #include "quiche/quic/core/quic_time.h" |
| #include "quiche/quic/moqt/moqt_error.h" |
| #include "quiche/quic/moqt/moqt_key_value_pair.h" |
| #include "quiche/quic/moqt/moqt_messages.h" |
| #include "quiche/quic/moqt/moqt_names.h" |
| #include "quiche/quic/moqt/moqt_object.h" |
| #include "quiche/quic/moqt/moqt_priority.h" |
| #include "quiche/quic/moqt/moqt_types.h" |
| #include "quiche/common/platform/api/quiche_bug_tracker.h" |
| #include "quiche/common/platform/api/quiche_logging.h" |
| #include "quiche/common/quiche_buffer_allocator.h" |
| #include "quiche/common/quiche_data_writer.h" |
| #include "quiche/common/simple_buffer_allocator.h" |
| #include "quiche/common/wire_serialization.h" |
| |
| namespace moqt { |
| |
| namespace { |
| |
| using ::quiche::QuicheBuffer; |
| using ::quiche::WireBytes; |
| using ::quiche::WireOptional; |
| using ::quiche::WireSpan; |
| using ::quiche::WireStringWithVarInt62Length; |
| using ::quiche::WireUint8; |
| using ::quiche::WireVarInt62; |
| |
| class WireKeyVarIntPair { |
| public: |
| explicit WireKeyVarIntPair(uint64_t key, uint64_t value) |
| : key_(key), value_(value) {} |
| |
| size_t GetLengthOnWire() { |
| return quiche::ComputeLengthOnWire(WireVarInt62(key_), |
| WireVarInt62(value_)); |
| } |
| absl::Status SerializeIntoWriter(quiche::QuicheDataWriter& writer) { |
| return quiche::SerializeIntoWriter(writer, WireVarInt62(key_), |
| WireVarInt62(value_)); |
| } |
| |
| private: |
| const uint64_t key_; |
| const uint64_t value_; |
| }; |
| |
| class WireKeyStringPair { |
| public: |
| explicit WireKeyStringPair(uint64_t key, absl::string_view value) |
| : key_(key), value_(value) {} |
| size_t GetLengthOnWire() { |
| return quiche::ComputeLengthOnWire(WireVarInt62(key_), |
| WireStringWithVarInt62Length(value_)); |
| } |
| absl::Status SerializeIntoWriter(quiche::QuicheDataWriter& writer) { |
| return quiche::SerializeIntoWriter(writer, WireVarInt62(key_), |
| WireStringWithVarInt62Length(value_)); |
| } |
| |
| private: |
| const uint64_t key_; |
| const absl::string_view value_; |
| }; |
| |
| class WireKeyValuePairList { |
| public: |
| explicit WireKeyValuePairList(const KeyValuePairList& list, |
| bool length_prefix = true) |
| : list_(list), length_prefix_(length_prefix) {} |
| |
| size_t GetLengthOnWire() { |
| size_t total = |
| length_prefix_ ? WireVarInt62(list_.size()).GetLengthOnWire() : 0; |
| uint64_t last_key = 0; |
| list_.ForEach([&](uint64_t key, |
| std::variant<uint64_t, absl::string_view> value) { |
| total += std::visit( |
| absl::Overload{ |
| [&](uint64_t val) { |
| return WireKeyVarIntPair(key - last_key, val).GetLengthOnWire(); |
| }, |
| [&](absl::string_view val) { |
| return WireKeyStringPair(key - last_key, val).GetLengthOnWire(); |
| }}, |
| value); |
| last_key = key; |
| return true; |
| }); |
| return total; |
| } |
| absl::Status SerializeIntoWriter(quiche::QuicheDataWriter& writer) { |
| if (length_prefix_) { |
| WireVarInt62(list_.size()).SerializeIntoWriter(writer); |
| } |
| uint64_t last_key = 0; |
| list_.ForEach( |
| [&](uint64_t key, std::variant<uint64_t, absl::string_view> value) { |
| absl::Status status = std::visit( |
| absl::Overload{[&](uint64_t val) { |
| return WireKeyVarIntPair(key - last_key, val) |
| .SerializeIntoWriter(writer); |
| }, |
| [&](absl::string_view val) { |
| return WireKeyStringPair(key - last_key, val) |
| .SerializeIntoWriter(writer); |
| }}, |
| value); |
| last_key = key; |
| return quiche::IsWriterStatusOk(status); |
| }); |
| return absl::OkStatus(); |
| } |
| |
| private: |
| const KeyValuePairList& list_; |
| const bool length_prefix_; |
| }; |
| |
| class WireTrackNamespace { |
| public: |
| WireTrackNamespace(const TrackNamespace& name) : namespace_(name) {} |
| |
| size_t GetLengthOnWire() { |
| absl::FixedArray<absl::string_view> tuple(namespace_.tuple().begin(), |
| namespace_.tuple().end()); |
| return quiche::ComputeLengthOnWire( |
| WireVarInt62(namespace_.number_of_elements()), |
| WireSpan<WireStringWithVarInt62Length, absl::string_view>( |
| absl::MakeSpan(tuple))); |
| } |
| absl::Status SerializeIntoWriter(quiche::QuicheDataWriter& writer) { |
| absl::FixedArray<absl::string_view> tuple(namespace_.tuple().begin(), |
| namespace_.tuple().end()); |
| return quiche::SerializeIntoWriter( |
| writer, WireVarInt62(namespace_.number_of_elements()), |
| WireSpan<WireStringWithVarInt62Length, absl::string_view>( |
| absl::MakeSpan(tuple))); |
| } |
| |
| private: |
| const TrackNamespace& namespace_; |
| }; |
| |
| class WireFullTrackName { |
| public: |
| WireFullTrackName(const FullTrackName& name) : name_(name) {} |
| |
| size_t GetLengthOnWire() { |
| return quiche::ComputeLengthOnWire( |
| WireTrackNamespace(name_.track_namespace()), |
| WireStringWithVarInt62Length(name_.name())); |
| } |
| absl::Status SerializeIntoWriter(quiche::QuicheDataWriter& writer) { |
| return quiche::SerializeIntoWriter( |
| writer, WireTrackNamespace(name_.track_namespace()), |
| WireStringWithVarInt62Length(name_.name())); |
| } |
| |
| private: |
| const FullTrackName& name_; |
| }; |
| |
| // Serializes data into buffer using the default allocator. Invokes QUICHE_BUG |
| // on failure. |
| template <typename... Ts> |
| QuicheBuffer Serialize(Ts... data) { |
| absl::StatusOr<QuicheBuffer> buffer = quiche::SerializeIntoBuffer( |
| quiche::SimpleBufferAllocator::Get(), data...); |
| if (!buffer.ok()) { |
| QUICHE_BUG(moqt_failed_serialization) |
| << "Failed to serialize MoQT frame: " << buffer.status(); |
| return QuicheBuffer(); |
| } |
| return *std::move(buffer); |
| } |
| |
| // Serializes data into buffer using the default allocator. Invokes QUICHE_BUG |
| // on failure. |
| template <typename... Ts> |
| QuicheBuffer SerializeControlMessage(MoqtMessageType type, Ts... data) { |
| uint64_t message_type = static_cast<uint64_t>(type); |
| size_t payload_size = quiche::ComputeLengthOnWire(data...); |
| size_t buffer_size = sizeof(uint16_t) + payload_size + |
| quiche::ComputeLengthOnWire(WireVarInt62(message_type)); |
| if (buffer_size == 0) { |
| return QuicheBuffer(); |
| } |
| |
| QuicheBuffer buffer(quiche::SimpleBufferAllocator::Get(), buffer_size); |
| quiche::QuicheDataWriter writer(buffer.size(), buffer.data()); |
| absl::Status status = |
| SerializeIntoWriter(writer, WireVarInt62(message_type), |
| quiche::WireUint16(payload_size), data...); |
| if (!status.ok() || writer.remaining() != 0) { |
| QUICHE_BUG(moqt_failed_serialization) |
| << "Failed to serialize MoQT frame: " << status; |
| return QuicheBuffer(); |
| } |
| return buffer; |
| } |
| |
| [[maybe_unused]] WireUint8 WireDeliveryOrder( |
| std::optional<MoqtDeliveryOrder> delivery_order) { |
| if (!delivery_order.has_value()) { |
| return WireUint8(0x00); |
| } |
| switch (*delivery_order) { |
| case MoqtDeliveryOrder::kAscending: |
| return WireUint8(0x01); |
| case MoqtDeliveryOrder::kDescending: |
| return WireUint8(0x02); |
| } |
| QUICHE_NOTREACHED(); |
| return WireUint8(0xff); |
| } |
| |
| WireUint8 WireBoolean(bool value) { return WireUint8(value ? 0x01 : 0x00); } |
| |
| uint64_t SignedVarintSerializedForm(int64_t value) { |
| if (value < 0) { |
| return ((-value) << 1) | 0x01; |
| } |
| return value << 1; |
| } |
| |
| quiche::QuicheBuffer SerializeAuthToken(const AuthToken& token) { |
| return Serialize(WireVarInt62(token.alias_type), |
| WireOptional<WireVarInt62>(token.alias), |
| WireOptional<WireVarInt62>(token.type), |
| WireOptional<WireBytes>(token.value)); |
| } |
| |
| quiche::QuicheBuffer SerializeSubscriptionFilter( |
| const SubscriptionFilter& filter) { |
| switch (filter.type()) { |
| case MoqtFilterType::kNextGroupStart: |
| return Serialize(WireVarInt62(filter.type())); |
| case MoqtFilterType::kLargestObject: |
| return Serialize(WireVarInt62(filter.type())); |
| case MoqtFilterType::kAbsoluteStart: |
| return Serialize( |
| WireVarInt62(filter.type()), |
| WireKeyVarIntPair(filter.start().group, filter.start().object)); |
| case MoqtFilterType::kAbsoluteRange: |
| return Serialize( |
| WireVarInt62(filter.type()), |
| WireKeyVarIntPair(filter.start().group, filter.start().object), |
| WireVarInt62(filter.end_group())); |
| } |
| } |
| |
| quiche::QuicheBuffer SerializeLocation(const Location& location) { |
| return Serialize(WireKeyVarIntPair(location.group, location.object)); |
| } |
| |
| } // namespace |
| |
| KeyValuePairList SetupParameters::ToKeyValuePairList() const { |
| KeyValuePairList out; |
| if (max_request_id.has_value()) { |
| out.insert(static_cast<uint64_t>(SetupParameter::kMaxRequestId), |
| *max_request_id); |
| } |
| if (max_auth_token_cache_size.has_value()) { |
| out.insert(static_cast<uint64_t>(SetupParameter::kMaxAuthTokenCacheSize), |
| *max_auth_token_cache_size); |
| } |
| if (path.has_value()) { |
| out.insert(static_cast<uint64_t>(SetupParameter::kPath), *path); |
| } |
| for (const AuthToken& token : authorization_tokens) { |
| out.insert(static_cast<uint64_t>(SetupParameter::kAuthorizationToken), |
| SerializeAuthToken(token).AsStringView()); |
| } |
| if (authority.has_value()) { |
| out.insert(static_cast<uint64_t>(SetupParameter::kAuthority), *authority); |
| } |
| if (moqt_implementation.has_value()) { |
| out.insert(static_cast<uint64_t>(SetupParameter::kMoqtImplementation), |
| *moqt_implementation); |
| } |
| if (support_object_acks.has_value()) { |
| out.insert(static_cast<uint64_t>(SetupParameter::kSupportObjectAcks), |
| *support_object_acks ? 1ULL : 0ULL); |
| } |
| return out; |
| } |
| |
| KeyValuePairList MessageParameters::ToKeyValuePairList() const { |
| KeyValuePairList list; |
| if (delivery_timeout.has_value()) { |
| // Value cannot be zero. |
| int64_t milliseconds = |
| std::max(delivery_timeout->ToMilliseconds(), int64_t{1}); |
| list.insert(static_cast<uint64_t>(MessageParameter::kDeliveryTimeout), |
| static_cast<uint64_t>(milliseconds)); |
| } |
| for (const AuthToken& token : authorization_tokens) { |
| list.insert(static_cast<uint64_t>(MessageParameter::kAuthorizationToken), |
| SerializeAuthToken(token).AsStringView()); |
| } |
| if (expires.has_value()) { |
| list.insert(static_cast<uint64_t>(MessageParameter::kExpires), |
| static_cast<uint64_t>(expires->ToMilliseconds())); |
| } |
| if (largest_object.has_value()) { |
| list.insert(static_cast<uint64_t>(MessageParameter::kLargestObject), |
| SerializeLocation(*largest_object).AsStringView()); |
| } |
| if (forward_has_value()) { |
| list.insert(static_cast<uint64_t>(MessageParameter::kForward), |
| forward() ? 1ULL : 0ULL); |
| } |
| if (subscriber_priority.has_value()) { |
| list.insert(static_cast<uint64_t>(MessageParameter::kSubscriberPriority), |
| *subscriber_priority); |
| } |
| if (subscription_filter.has_value()) { |
| list.insert( |
| static_cast<uint64_t>(MessageParameter::kSubscriptionFilter), |
| SerializeSubscriptionFilter(*subscription_filter).AsStringView()); |
| } |
| if (group_order.has_value()) { |
| list.insert(static_cast<uint64_t>(MessageParameter::kGroupOrder), |
| static_cast<uint64_t>(*group_order)); |
| } |
| if (new_group_request.has_value()) { |
| list.insert(static_cast<uint64_t>(MessageParameter::kNewGroupRequest), |
| *new_group_request); |
| } |
| if (oack_window_size.has_value()) { |
| list.insert(static_cast<uint64_t>(MessageParameter::kOackWindowSize), |
| static_cast<uint64_t>(oack_window_size->ToMicroseconds())); |
| } |
| return list; |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeObjectHeader( |
| const MoqtObject& message, MoqtDataStreamType message_type, |
| std::optional<PublishedObjectMetadata>& previous_object_in_stream) { |
| if (!ValidateObjectMetadata(message)) { |
| QUICHE_BUG(QUICHE_BUG_serialize_object_header_01) |
| << "Object metadata is invalid"; |
| return quiche::QuicheBuffer(); |
| } |
| // Many fields are optional because the stream type or Fetch serialization |
| // omits them. |
| std::optional<uint64_t> stream_type; |
| std::optional<uint64_t> track_id; // Track alias or FETCH ID. |
| std::optional<uint64_t> group_id; |
| std::optional<uint64_t> subgroup_id; |
| std::optional<uint64_t> object_id; |
| std::optional<uint8_t> publisher_priority; |
| std::optional<absl::string_view> extension_headers; |
| uint64_t payload_length = message.payload_length; |
| bool is_first_in_stream = !previous_object_in_stream.has_value(); |
| if (is_first_in_stream) { |
| stream_type = message_type.value(); |
| track_id = message.track_alias; |
| } |
| if (message_type.IsFetch()) { |
| MoqtFetchSerialization serialization; |
| if (is_first_in_stream) { |
| serialization = MoqtFetchSerialization(message); |
| } else { |
| serialization = |
| MoqtFetchSerialization(message, *previous_object_in_stream); |
| } |
| if (serialization.has_group_id()) { |
| group_id = message.group_id; |
| } |
| if (serialization.has_subgroup_id()) { |
| subgroup_id = message.subgroup_id; |
| } |
| if (serialization.has_object_id()) { |
| object_id = message.object_id; |
| } |
| if (serialization.has_priority()) { |
| publisher_priority = message.publisher_priority; |
| } |
| if (serialization.has_extensions()) { |
| extension_headers = message.extension_headers; |
| } |
| return Serialize( |
| WireOptional<WireVarInt62>(stream_type), |
| WireOptional<WireVarInt62>(track_id), |
| WireVarInt62(serialization.value()), |
| WireOptional<WireVarInt62>(group_id), |
| WireOptional<WireVarInt62>(subgroup_id), |
| WireOptional<WireVarInt62>(object_id), |
| WireOptional<WireUint8>(publisher_priority), |
| WireOptional<WireStringWithVarInt62Length>(extension_headers), |
| WireVarInt62(payload_length)); |
| } |
| // Subgroup stream. |
| if (!message.subgroup_id.has_value()) { |
| QUICHE_BUG(QUICHE_BUG_serialize_object_header_02) |
| << "Subgroup ID is missing"; |
| return quiche::QuicheBuffer(); |
| } |
| if (is_first_in_stream) { |
| group_id = message.group_id; |
| if (message_type.IsSubgroupPresent()) { |
| subgroup_id = message.subgroup_id; |
| } |
| if (!message_type.HasDefaultPriority()) { |
| publisher_priority = message.publisher_priority; |
| } |
| } |
| object_id = message.object_id; |
| if (!is_first_in_stream) { |
| *object_id -= (previous_object_in_stream->location.object + 1); |
| } |
| if (message_type.AreExtensionHeadersPresent()) { |
| extension_headers = message.extension_headers; |
| } |
| std::optional<uint64_t> object_status; |
| if (payload_length == 0) { |
| object_status = static_cast<uint64_t>(message.object_status); |
| } |
| return Serialize( |
| WireOptional<WireVarInt62>(stream_type), |
| WireOptional<WireVarInt62>(track_id), |
| WireOptional<WireVarInt62>(group_id), |
| WireOptional<WireVarInt62>(subgroup_id), |
| WireOptional<WireUint8>(publisher_priority), WireVarInt62(*object_id), |
| WireOptional<WireStringWithVarInt62Length>(extension_headers), |
| WireVarInt62(message.payload_length), |
| WireOptional<WireVarInt62>(object_status)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeObjectDatagram( |
| const MoqtObject& message, absl::string_view payload, |
| MoqtPriority default_priority) { |
| if (!ValidateObjectMetadata(message) || message.subgroup_id.has_value()) { |
| QUICHE_BUG(QUICHE_BUG_serialize_object_datagram_01) |
| << "Object metadata is invalid"; |
| return quiche::QuicheBuffer(); |
| } |
| if (message.payload_length != payload.length()) { |
| QUICHE_BUG(QUICHE_BUG_serialize_object_datagram_03) |
| << "Payload length does not match payload"; |
| return quiche::QuicheBuffer(); |
| } |
| MoqtDatagramType datagram_type( |
| !payload.empty(), !message.extension_headers.empty(), |
| message.object_status == MoqtObjectStatus::kEndOfGroup, |
| message.publisher_priority == default_priority, message.object_id == 0); |
| std::optional<uint64_t> object_id = |
| datagram_type.has_object_id() ? std::optional<uint64_t>(message.object_id) |
| : std::nullopt; |
| std::optional<uint8_t> publisher_priority = |
| datagram_type.has_default_priority() |
| ? std::nullopt |
| : std::optional<uint8_t>(message.publisher_priority); |
| std::optional<absl::string_view> extensions = |
| datagram_type.has_extension() |
| ? std::optional<absl::string_view>(message.extension_headers) |
| : std::nullopt; |
| std::optional<uint64_t> object_status = |
| payload.empty() ? std::optional<uint64_t>( |
| static_cast<uint64_t>(message.object_status)) |
| : std::nullopt; |
| std::optional<absl::string_view> raw_payload = |
| payload.empty() ? std::nullopt |
| : std::optional<absl::string_view>(payload); |
| return Serialize( |
| WireVarInt62(datagram_type.value()), WireVarInt62(message.track_alias), |
| WireVarInt62(message.group_id), WireOptional<WireVarInt62>(object_id), |
| WireOptional<WireUint8>(publisher_priority), |
| WireOptional<WireStringWithVarInt62Length>(extensions), |
| WireOptional<WireVarInt62>(object_status), |
| WireOptional<WireBytes>(raw_payload)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeClientSetup( |
| const MoqtClientSetup& message) { |
| KeyValuePairList parameters; |
| if (!FillAndValidateSetupParameters(MoqtMessageType::kClientSetup, |
| message.parameters, parameters)) { |
| return quiche::QuicheBuffer(); |
| } |
| return SerializeControlMessage(MoqtMessageType::kClientSetup, |
| WireKeyValuePairList(parameters)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeServerSetup( |
| const MoqtServerSetup& message) { |
| KeyValuePairList parameters; |
| if (!FillAndValidateSetupParameters(MoqtMessageType::kServerSetup, |
| message.parameters, parameters)) { |
| return quiche::QuicheBuffer(); |
| } |
| return SerializeControlMessage(MoqtMessageType::kServerSetup, |
| WireKeyValuePairList(parameters)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeRequestOk( |
| const MoqtRequestOk& message) { |
| return SerializeControlMessage( |
| MoqtMessageType::kRequestOk, WireVarInt62(message.request_id), |
| WireKeyValuePairList(message.parameters.ToKeyValuePairList())); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeSubscribe( |
| const MoqtSubscribe& message, MoqtMessageType message_type) { |
| return SerializeControlMessage( |
| message_type, WireVarInt62(message.request_id), |
| WireFullTrackName(message.full_track_name), |
| WireKeyValuePairList(message.parameters.ToKeyValuePairList())); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeSubscribeOk( |
| const MoqtSubscribeOk& message, MoqtMessageType message_type) { |
| if (!message.extensions.Validate()) { |
| QUICHE_BUG(QUICHE_BUG_serialize_subscribe_ok_01) |
| << "Subscribe OK extensions are ill-formed"; |
| return quiche::QuicheBuffer(); |
| } |
| return SerializeControlMessage( |
| message_type, WireVarInt62(message.request_id), |
| WireVarInt62(message.track_alias), |
| WireKeyValuePairList(message.parameters.ToKeyValuePairList()), |
| WireKeyValuePairList(message.extensions, false)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeRequestError( |
| const MoqtRequestError& message) { |
| return SerializeControlMessage( |
| MoqtMessageType::kRequestError, WireVarInt62(message.request_id), |
| WireVarInt62(message.error_code), |
| WireVarInt62(message.retry_interval.has_value() |
| ? message.retry_interval->ToMilliseconds() + 1 |
| : 0), |
| WireStringWithVarInt62Length(message.reason_phrase)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeUnsubscribe( |
| const MoqtUnsubscribe& message) { |
| return SerializeControlMessage(MoqtMessageType::kUnsubscribe, |
| WireVarInt62(message.request_id)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializePublishDone( |
| const MoqtPublishDone& message) { |
| return SerializeControlMessage( |
| MoqtMessageType::kPublishDone, WireVarInt62(message.request_id), |
| WireVarInt62(message.status_code), WireVarInt62(message.stream_count), |
| WireStringWithVarInt62Length(message.error_reason)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeRequestUpdate( |
| const MoqtRequestUpdate& message) { |
| return SerializeControlMessage( |
| MoqtMessageType::kRequestUpdate, WireVarInt62(message.request_id), |
| WireVarInt62(message.existing_request_id), |
| WireKeyValuePairList(message.parameters.ToKeyValuePairList())); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializePublishNamespace( |
| const MoqtPublishNamespace& message) { |
| return SerializeControlMessage( |
| MoqtMessageType::kPublishNamespace, WireVarInt62(message.request_id), |
| WireTrackNamespace(message.track_namespace), |
| WireKeyValuePairList(message.parameters.ToKeyValuePairList())); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializePublishNamespaceDone( |
| const MoqtPublishNamespaceDone& message) { |
| return SerializeControlMessage(MoqtMessageType::kPublishNamespaceDone, |
| WireVarInt62(message.request_id)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeNamespace( |
| const MoqtNamespace& message) { |
| return SerializeControlMessage( |
| MoqtMessageType::kNamespace, |
| WireTrackNamespace(message.track_namespace_suffix)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeNamespaceDone( |
| const MoqtNamespaceDone& message) { |
| return SerializeControlMessage( |
| MoqtMessageType::kNamespaceDone, |
| WireTrackNamespace(message.track_namespace_suffix)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializePublishNamespaceCancel( |
| const MoqtPublishNamespaceCancel& message) { |
| return SerializeControlMessage( |
| MoqtMessageType::kPublishNamespaceCancel, |
| WireVarInt62(message.request_id), WireVarInt62(message.error_code), |
| WireStringWithVarInt62Length(message.error_reason)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeTrackStatus( |
| const MoqtTrackStatus& message) { |
| return SerializeSubscribe(message, MoqtMessageType::kTrackStatus); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeGoAway(const MoqtGoAway& message) { |
| return SerializeControlMessage( |
| MoqtMessageType::kGoAway, |
| WireStringWithVarInt62Length(message.new_session_uri)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeSubscribeNamespace( |
| const MoqtSubscribeNamespace& message) { |
| return SerializeControlMessage( |
| MoqtMessageType::kSubscribeNamespace, WireVarInt62(message.request_id), |
| WireTrackNamespace(message.track_namespace_prefix), |
| WireVarInt62(message.subscribe_options), |
| WireKeyValuePairList(message.parameters.ToKeyValuePairList())); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeMaxRequestId( |
| const MoqtMaxRequestId& message) { |
| return SerializeControlMessage(MoqtMessageType::kMaxRequestId, |
| WireVarInt62(message.max_request_id)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeFetch(const MoqtFetch& message) { |
| if (std::holds_alternative<StandaloneFetch>(message.fetch)) { |
| const StandaloneFetch& standalone_fetch = |
| std::get<StandaloneFetch>(message.fetch); |
| if (standalone_fetch.end_location < standalone_fetch.start_location) { |
| QUICHE_BUG(MoqtFramer_invalid_fetch) << "Invalid FETCH object range"; |
| return quiche::QuicheBuffer(); |
| } |
| } |
| if (std::holds_alternative<StandaloneFetch>(message.fetch)) { |
| const StandaloneFetch& standalone_fetch = |
| std::get<StandaloneFetch>(message.fetch); |
| return SerializeControlMessage( |
| MoqtMessageType::kFetch, WireVarInt62(message.request_id), |
| WireVarInt62(FetchType::kStandalone), |
| WireFullTrackName(standalone_fetch.full_track_name), |
| WireVarInt62(standalone_fetch.start_location.group), |
| WireVarInt62(standalone_fetch.start_location.object), |
| WireVarInt62(standalone_fetch.end_location.group), |
| WireVarInt62(standalone_fetch.end_location.object == kMaxObjectId |
| ? 0 |
| : standalone_fetch.end_location.object + 1), |
| WireKeyValuePairList(message.parameters.ToKeyValuePairList())); |
| } |
| uint64_t request_id, joining_start; |
| if (std::holds_alternative<JoiningFetchRelative>(message.fetch)) { |
| const JoiningFetchRelative& joining_fetch = |
| std::get<JoiningFetchRelative>(message.fetch); |
| request_id = joining_fetch.joining_request_id; |
| joining_start = joining_fetch.joining_start; |
| } else { |
| const JoiningFetchAbsolute& joining_fetch = |
| std::get<JoiningFetchAbsolute>(message.fetch); |
| request_id = joining_fetch.joining_request_id; |
| joining_start = joining_fetch.joining_start; |
| } |
| return SerializeControlMessage( |
| MoqtMessageType::kFetch, WireVarInt62(message.request_id), |
| WireVarInt62(message.fetch.index() + 1), WireVarInt62(request_id), |
| WireVarInt62(joining_start), |
| WireKeyValuePairList(message.parameters.ToKeyValuePairList())); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeFetchOk(const MoqtFetchOk& message) { |
| return SerializeControlMessage( |
| MoqtMessageType::kFetchOk, WireVarInt62(message.request_id), |
| WireBoolean(message.end_of_track), |
| WireVarInt62(message.end_location.group), |
| WireVarInt62(message.end_location.object == kMaxObjectId |
| ? 0 |
| : (message.end_location.object + 1)), |
| WireKeyValuePairList(message.parameters.ToKeyValuePairList()), |
| WireKeyValuePairList(message.extensions, false)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeFetchCancel( |
| const MoqtFetchCancel& message) { |
| return SerializeControlMessage(MoqtMessageType::kFetchCancel, |
| WireVarInt62(message.request_id)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeRequestsBlocked( |
| const MoqtRequestsBlocked& message) { |
| return SerializeControlMessage(MoqtMessageType::kRequestsBlocked, |
| WireVarInt62(message.max_request_id)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializePublish(const MoqtPublish& message) { |
| return SerializeControlMessage( |
| MoqtMessageType::kPublish, WireVarInt62(message.request_id), |
| WireFullTrackName(message.full_track_name), |
| WireVarInt62(message.track_alias), |
| WireKeyValuePairList(message.parameters.ToKeyValuePairList()), |
| WireKeyValuePairList(message.extensions, false)); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializePublishOk( |
| const MoqtPublishOk& message) { |
| return SerializeControlMessage( |
| MoqtMessageType::kPublishOk, WireVarInt62(message.request_id), |
| WireKeyValuePairList(message.parameters.ToKeyValuePairList())); |
| } |
| |
| quiche::QuicheBuffer MoqtFramer::SerializeObjectAck( |
| const MoqtObjectAck& message) { |
| return SerializeControlMessage( |
| MoqtMessageType::kObjectAck, WireVarInt62(message.subscribe_id), |
| WireVarInt62(message.group_id), WireVarInt62(message.object_id), |
| WireVarInt62(SignedVarintSerializedForm( |
| message.delta_from_deadline.ToMicroseconds()))); |
| } |
| |
| bool MoqtFramer::FillAndValidateSetupParameters( |
| MoqtMessageType message_type, const SetupParameters& parameters, |
| KeyValuePairList& out) { |
| if (SetupParametersAllowedByMessage(parameters, message_type, |
| using_webtrans_) != MoqtError::kNoError) { |
| QUICHE_BUG(QUICHE_BUG_invalid_setup_parameters) |
| << "Invalid setup parameters for " |
| << MoqtMessageTypeToString(message_type); |
| return false; |
| } |
| out = parameters.ToKeyValuePairList(); |
| return true; |
| } |
| |
| // static |
| bool MoqtFramer::ValidateObjectMetadata(const MoqtObject& object) { |
| return (object.object_status == MoqtObjectStatus::kNormal || |
| object.object_status == MoqtObjectStatus::kEndOfGroup || |
| object.payload_length == 0); |
| } |
| |
| } // namespace moqt |
