56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
|
/*
|
||
|
|
* 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"
|
||
|
|
|
||
|
|
namespace cricket {
|
||
|
|
|
||
|
|
// 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/";
|
||
|
|
|
||
|
|
const char kMediaProtocolSctp[] = "SCTP";
|
||
|
|
const char kMediaProtocolDtlsSctp[] = "DTLS/SCTP";
|
||
|
|
const char kMediaProtocolUdpDtlsSctp[] = "UDP/DTLS/SCTP";
|
||
|
|
const char kMediaProtocolTcpDtlsSctp[] = "TCP/DTLS/SCTP";
|
||
|
|
|
||
|
|
bool IsDtlsSctp(const std::string& protocol) {
|
||
|
|
return protocol == kMediaProtocolDtlsSctp ||
|
||
|
|
protocol == kMediaProtocolUdpDtlsSctp ||
|
||
|
|
protocol == kMediaProtocolTcpDtlsSctp;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool IsPlainSctp(const std::string& protocol) {
|
||
|
|
return protocol == kMediaProtocolSctp;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool IsRtpProtocol(const std::string& 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(protocol[pos - 1])) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool IsSctpProtocol(const std::string& protocol) {
|
||
|
|
return IsPlainSctp(protocol) || IsDtlsSctp(protocol);
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace cricket
|