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Various entities in SCTP are padded data blocks, with a type and length field at fixed offsets, all stored in a 4-byte header. This is called the Type-Length-Value format, or TLV for short. See e.g. https://tools.ietf.org/html/rfc4960#section-3.2 and https://tools.ietf.org/html/rfc4960#section-3.2.1 This templated class, which is used as a trait[1], is configurable - a struct passed in as template parameter. [1] https://en.wikipedia.org/wiki/Trait_(computer_programming) Bug: webrtc:12614 Change-Id: I52c2b5056931aba5fb23419406314136b5a4f650 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/213180 Commit-Queue: Victor Boivie <boivie@webrtc.org> Reviewed-by: Tommi <tommi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33602}
46 lines
1.7 KiB
C++
46 lines
1.7 KiB
C++
/*
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* Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "net/dcsctp/packet/tlv_trait.h"
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#include "rtc_base/logging.h"
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namespace dcsctp {
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namespace tlv_trait_impl {
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void ReportInvalidSize(size_t actual_size, size_t expected_size) {
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RTC_DLOG(LS_WARNING) << "Invalid size (" << actual_size
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<< ", expected minimum " << expected_size << " bytes)";
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}
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void ReportInvalidType(int actual_type, int expected_type) {
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RTC_DLOG(LS_WARNING) << "Invalid type (" << actual_type << ", expected "
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<< expected_type << ")";
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}
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void ReportInvalidFixedLengthField(size_t value, size_t expected) {
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RTC_DLOG(LS_WARNING) << "Invalid length field (" << value << ", expected "
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<< expected << " bytes)";
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}
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void ReportInvalidVariableLengthField(size_t value, size_t available) {
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RTC_DLOG(LS_WARNING) << "Invalid length field (" << value << ", available "
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<< available << " bytes)";
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}
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void ReportInvalidPadding(size_t padding_bytes) {
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RTC_DLOG(LS_WARNING) << "Invalid padding (" << padding_bytes << " bytes)";
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}
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void ReportInvalidLengthMultiple(size_t length, size_t alignment) {
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RTC_DLOG(LS_WARNING) << "Invalid length field (" << length
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<< ", expected an even multiple of " << alignment
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<< " bytes)";
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}
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} // namespace tlv_trait_impl
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} // namespace dcsctp
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