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Diffstat (limited to 'third_party/libwebrtc/net/dcsctp/packet/error_cause/missing_mandatory_parameter_cause.cc')
-rw-r--r-- | third_party/libwebrtc/net/dcsctp/packet/error_cause/missing_mandatory_parameter_cause.cc | 90 |
1 files changed, 90 insertions, 0 deletions
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 |