Do not recalculate RTP header size

sirzooro · sirzooro · commit 080b88b499a9 · 2025-09-25T09:43:10.000+02:00
diff --git a/srtp_cipher_aead_aes_gcm.go b/srtp_cipher_aead_aes_gcm.go
@@ -101,7 +101,7 @@ func (s *srtpCipherAeadAesGcm) encryptRTP(
 		return nil, err
 	}
 	payloadLen := len(plaintext) - headerLen
-	authPartLen := header.MarshalSize() + payloadLen + authTagLen
+	authPartLen := headerLen + payloadLen + authTagLen
 	dstLen := authPartLen + len(s.mki)
 	if rocInAuthTag {
 		dstLen += 4

Original file line number	Diff line number	Diff line change
`@@ -101,7 +101,7 @@ func (s *srtpCipherAeadAesGcm) encryptRTP(`
`101`	`101`	`return nil, err`
`102`	`102`	`}`
`103`	`103`	`payloadLen := len(plaintext) - headerLen`
`104`		`- authPartLen := header.MarshalSize() + payloadLen + authTagLen`
	`104`	`+ authPartLen := headerLen + payloadLen + authTagLen`
`105`	`105`	`dstLen := authPartLen + len(s.mki)`
`106`	`106`	`if rocInAuthTag {`
`107`	`107`	`dstLen += 4`