snapshot of https://github.com/pion/webrtc.git (main, 2026-09-15; blobs > 131072B omitted)

constants.go

@@ -0,0 +1,70 @@
+// SPDX-FileCopyrightText: 2026 The Pion community <https://pion.ly>
+// SPDX-License-Identifier: MIT
+
+package webrtc
+
+import (
+	"math"
+
+	"github.com/pion/dtls/v3"
+)
+
+const (
+	// default as the standard ethernet MTU
+	// can be overwritten with SettingEngine.SetReceiveMTU().
+	receiveMTU = 1500
+
+	// simulcastProbeCount is the amount of RTP Packets
+	// that handleUndeclaredSSRC will read and try to dispatch from
+	// mid and rid values.
+	simulcastProbeCount = 10
+
+	// simulcastMaxProbeRoutines is how many active routines can be used to probe
+	// If the total amount of incoming SSRCes exceeds this new requests will be ignored.
+	simulcastMaxProbeRoutines = 25
+
+	// Default Max SCTP Message Size is the largest single DataChannel
+	// message we can send or accept. This default was chosen to match FireFox.
+	defaultMaxSCTPMessageSize = 1073741823
+
+	// If a DataChannel Max Message Size isn't declared by the Remote(max-message-size)
+	// this is the value we default to. This value was chosen because it was the behavior
+	// of Pion before max-message-size was implemented.
+	sctpMaxMessageSizeUnsetValue = math.MaxUint16
+
+	mediaSectionApplication = "application"
+
+	sdpAttributeRid = "rid"
+
+	sdpAttributeSimulcast = "simulcast"
+
+	outboundMTU = 1200
+
+	sctpOutboundMTU = 1191
+
+	rtpPayloadTypeBitmask = 0x7F
+
+	incomingUnhandledRTPSsrc = "Incoming unhandled RTP ssrc(%d), OnTrack will not be fired. %v"
+
+	useReadSimulcast = "Use ReadSimulcast(rid) instead of Read() when multiple tracks are present"
+
+	generatedCertificateOrigin = "WebRTC"
+
+	// AttributeRtxPayloadType is the interceptor attribute added when Read()
+	// returns an RTX packet containing the RTX stream payload type.
+	AttributeRtxPayloadType = "rtx_payload_type"
+	// AttributeRtxSsrc is the interceptor attribute added when Read()
+	// returns an RTX packet containing the RTX stream SSRC.
+	AttributeRtxSsrc = "rtx_ssrc"
+	// AttributeRtxSequenceNumber is the interceptor attribute added when
+	// Read() returns an RTX packet containing the RTX stream sequence number.
+	AttributeRtxSequenceNumber = "rtx_sequence_number"
+)
+
+func defaultSrtpProtectionProfiles() []dtls.SRTPProtectionProfile {
+	return []dtls.SRTPProtectionProfile{
+		dtls.SRTP_AEAD_AES_256_GCM,
+		dtls.SRTP_AEAD_AES_128_GCM,
+		dtls.SRTP_AES128_CM_HMAC_SHA1_80,
+	}
+}