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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /third_party/libwebrtc/pc/media_protocol_names.cc | |
parent | Initial commit. (diff) | |
download | thunderbird-upstream.tar.xz thunderbird-upstream.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/libwebrtc/pc/media_protocol_names.cc')
-rw-r--r-- | third_party/libwebrtc/pc/media_protocol_names.cc | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/third_party/libwebrtc/pc/media_protocol_names.cc b/third_party/libwebrtc/pc/media_protocol_names.cc new file mode 100644 index 0000000000..52d676daf5 --- /dev/null +++ b/third_party/libwebrtc/pc/media_protocol_names.cc @@ -0,0 +1,105 @@ +/* + * Copyright 2019 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 "pc/media_protocol_names.h" + +#include <ctype.h> +#include <stddef.h> + +#include <string> + +namespace cricket { + +// The official registry of RTP parameters is at +// http://www.iana.org/assignments/rtp-parameters/rtp-parameters.xml +// The UDP/DTLS and TCP/DTLS prefixes are not registered there. + +// There are multiple variants of the RTP protocol stack, including +// UDP/TLS/RTP/SAVPF (WebRTC default), RTP/AVP, RTP/AVPF, RTP/SAVPF, +// TCP/DTLS/RTP/SAVPF and so on. We accept anything that has RTP/ +// embedded in it somewhere as being an RTP protocol. +const char kMediaProtocolRtpPrefix[] = "RTP/"; + +// Protocol names generated by WebRTC +const char kMediaProtocolSctp[] = "SCTP"; +const char kMediaProtocolUdpDtlsSctp[] = "UDP/DTLS/SCTP"; +const char kMediaProtocolDtlsSctp[] = "DTLS/SCTP"; +const char kMediaProtocolTcpDtlsSctp[] = "TCP/DTLS/SCTP"; +// RFC5124 +const char kMediaProtocolDtlsSavpf[] = "UDP/TLS/RTP/SAVPF"; +const char kMediaProtocolSavpf[] = "RTP/SAVPF"; +const char kMediaProtocolAvpf[] = "RTP/AVPF"; + +namespace { + +// Protocol names that we tolerate, but do not generate. +// We always generate offers with "UDP/TLS/RTP/SAVPF" when using DTLS-SRTP, +// but we tolerate "RTP/SAVPF" and "RTP/SAVP" and the "UDP/TLS" and "TCP/TLS" +// prefixes in offers we receive, for compatibility. +// RFC4585 +const char kMediaProtocolSavp[] = "RTP/SAVP"; +const char kMediaProtocolAvp[] = "RTP/AVP"; + +const char kMediaProtocolTcpTlsSavpf[] = "TCP/TLS/RTP/SAVPF"; +const char kMediaProtocolUdpTlsSavpf[] = "UDP/TLS/RTP/SAVPF"; +const char kMediaProtocolTcpTlsSavp[] = "TCP/TLS/RTP/SAVP"; +const char kMediaProtocolUdpTlsSavp[] = "UDP/TLS/RTP/SAVP"; + +} // namespace + +bool IsDtlsSctp(absl::string_view protocol) { + return protocol == kMediaProtocolDtlsSctp || + protocol == kMediaProtocolUdpDtlsSctp || + protocol == kMediaProtocolTcpDtlsSctp; +} + +bool IsPlainSctp(absl::string_view protocol) { + return protocol == kMediaProtocolSctp; +} + +bool IsSctpProtocol(absl::string_view protocol) { + return IsPlainSctp(protocol) || IsDtlsSctp(protocol); +} + +bool IsRtpProtocol(absl::string_view protocol) { + if (protocol.empty()) { + return true; + } + size_t pos = protocol.find(cricket::kMediaProtocolRtpPrefix); + if (pos == std::string::npos) { + return false; + } + // RTP must be at the beginning of a string or not preceded by alpha + if (pos == 0 || !isalpha(static_cast<unsigned char>(protocol[pos - 1]))) { + return true; + } + return false; +} + +// Note that the below functions support some protocol strings purely for +// legacy compatibility, as required by JSEP in Section 5.1.2, Profile Names +// and Interoperability. + +bool IsDtlsRtp(absl::string_view protocol) { + // Most-likely values first. + return protocol == kMediaProtocolDtlsSavpf || + protocol == kMediaProtocolTcpTlsSavpf || + protocol == kMediaProtocolUdpTlsSavpf || + protocol == kMediaProtocolUdpTlsSavp || + protocol == kMediaProtocolTcpTlsSavp; +} + +bool IsPlainRtp(absl::string_view protocol) { + // Most-likely values first. + return protocol == kMediaProtocolSavpf || protocol == kMediaProtocolAvpf || + protocol == kMediaProtocolSavp || protocol == kMediaProtocolAvp; +} + +} // namespace cricket |