serve.zone/siprouter
3
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix(proxy-engine,codec-lib,sip-proto,ts): preserve negotiated media details and improve RTP audio handling across call legs

Browse Source
This commit is contained in:
Jürgen Kunz
2026-04-10 16:57:07 +00:00
parent 2aca5f1510
commit f78639dd19
15 changed files with 260 additions and 81 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
rust/crates/proxy-engine/src/leg_io.rs
View File

@@ -35,7 +35,8 @@ pub fn create_leg_channels() -> LegChannels {
}
/// Spawn the inbound I/O task for a SIP leg.
/// Reads RTP from the socket, strips the 12-byte header, sends payload to the mixer.
/// Reads RTP from the socket, parses the variable-length header (RFC 3550),
/// and sends the payload to the mixer.
/// Returns the JoinHandle (exits when the inbound_tx channel is dropped).
pub fn spawn_sip_inbound(
rtp_socket: Arc<UdpSocket>,
@@ -51,12 +52,29 @@ pub fn spawn_sip_inbound(
}
let pt = buf[1] & 0x7F;
let marker = (buf[1] & 0x80) != 0;
let seq = u16::from_be_bytes([buf[2], buf[3]]);
let timestamp = u32::from_be_bytes([buf[4], buf[5], buf[6], buf[7]]);
let payload = buf[12..n].to_vec();
// RFC 3550: header length = 12 + (CC * 4) + optional extension.
let cc = (buf[0] & 0x0F) as usize;
let has_extension = (buf[0] & 0x10) != 0;
let mut offset = 12 + cc * 4;
if has_extension {
if offset + 4 > n {
continue; // Malformed: extension header truncated.
}
let ext_len = u16::from_be_bytes([buf[offset + 2], buf[offset + 3]]) as usize;
offset += 4 + ext_len * 4;
}
if offset >= n {
continue; // No payload after header.
}
let payload = buf[offset..n].to_vec();
if payload.is_empty() {
continue;
}
if inbound_tx.send(RtpPacket { payload, payload_type: pt, marker, timestamp }).await.is_err() {
if inbound_tx.send(RtpPacket { payload, payload_type: pt, marker, seq, timestamp }).await.is_err() {
break; // Channel closed — leg removed.
}
}