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/shutdown_chunk.cc      | 55 ++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk.cc

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

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
-- 
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