d4aa3a3196
A step towards reduced copying in SDP parsing. Bug: None Change-Id: I3a5d89f483c1809929b7160b563c67b040c9df41 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/233080 Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/main@{#35122}
61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
/*
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* Copyright 2019 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 "pc/media_protocol_names.h"
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#include <ctype.h>
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#include <stddef.h>
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#include <string>
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namespace cricket {
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// There are multiple variants of the RTP protocol stack, including
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// UDP/TLS/RTP/SAVPF (WebRTC default), RTP/AVP, RTP/AVPF, RTP/SAVPF,
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// TCP/DTLS/RTP/SAVPF and so on. We accept anything that has RTP/
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// embedded in it somewhere as being an RTP protocol.
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const char kMediaProtocolRtpPrefix[] = "RTP/";
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const char kMediaProtocolSctp[] = "SCTP";
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const char kMediaProtocolDtlsSctp[] = "DTLS/SCTP";
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const char kMediaProtocolUdpDtlsSctp[] = "UDP/DTLS/SCTP";
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const char kMediaProtocolTcpDtlsSctp[] = "TCP/DTLS/SCTP";
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bool IsDtlsSctp(absl::string_view protocol) {
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return protocol == kMediaProtocolDtlsSctp ||
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protocol == kMediaProtocolUdpDtlsSctp ||
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protocol == kMediaProtocolTcpDtlsSctp;
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}
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bool IsPlainSctp(absl::string_view protocol) {
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return protocol == kMediaProtocolSctp;
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}
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bool IsRtpProtocol(absl::string_view protocol) {
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if (protocol.empty()) {
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return true;
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}
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size_t pos = protocol.find(cricket::kMediaProtocolRtpPrefix);
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if (pos == std::string::npos) {
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return false;
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}
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// RTP must be at the beginning of a string or not preceded by alpha
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if (pos == 0 || !isalpha(protocol[pos - 1])) {
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return true;
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}
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return false;
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}
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bool IsSctpProtocol(absl::string_view protocol) {
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return IsPlainSctp(protocol) || IsDtlsSctp(protocol);
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}
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} // namespace cricket
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