From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 19:32:43 +0200
Subject: Adding upstream version 1:115.7.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../net/dcsctp/packet/chunk/data_chunk.cc          | 101 +++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 third_party/libwebrtc/net/dcsctp/packet/chunk/data_chunk.cc

(limited to 'third_party/libwebrtc/net/dcsctp/packet/chunk/data_chunk.cc')

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
-- 
cgit v1.2.3