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fix handling of port 0 on multicast locator #1968

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Merged
yellowhatter merged 1 commit into from
Jul 3, 2025
+10 −4
Merged

fix handling of port 0 on multicast locator #1968

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14 changes: 10 additions & 4 deletions io/zenoh-links/zenoh-link-udp/src/multicast.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -191,7 +191,7 @@ impl LinkManagerMulticastUdp {
config: Config<'_>,
bind_socket: Option<&str>,
dscp: Option<u32>,
) -> ZResult<(UdpSocket, UdpSocket, SocketAddr)> {
) -> ZResult<(UdpSocket, SocketAddr, UdpSocket, SocketAddr)> {
let domain = match mcast_addr.ip() {
IpAddr::V4(_) => Domain::IPV4,
IpAddr::V6(_) => Domain::IPV6,
Expand Down Expand Up @@ -382,8 +382,14 @@ impl LinkManagerMulticastUdp {
.local_addr()
.map_err(|e| zerror!("{}: {}", mcast_addr, e))?;
assert_eq!(ucast_addr.ip(), local_addr.ip());
// We may have bind to port 0, so we need to retrieve the actual port
let mcast_port = mcast_sock
.local_addr()
.map_err(|e| zerror!("{}: {}", mcast_addr, e))?
.port();
let mcast_addr = SocketAddr::new(mcast_addr.ip(), mcast_port);

Ok((mcast_sock, ucast_sock, ucast_addr))
Ok((mcast_sock, mcast_addr, ucast_sock, ucast_addr))
}
}

Expand All @@ -404,9 +410,9 @@ impl LinkManagerMulticastTrait for LinkManagerMulticastUdp {
.new_link_inner(&maddr, endpoint.config(), bind_socket, dscp)
.await
{
Ok((mcast_sock, ucast_sock, ucast_addr)) => {
Ok((mcast_sock, mcast_addr, ucast_sock, ucast_addr)) => {
let link = Arc::new(LinkMulticastUdp::new(
ucast_addr, ucast_sock, maddr, mcast_sock,
ucast_addr, ucast_sock, mcast_addr, mcast_sock,
));

return Ok(LinkMulticast(link));
Expand Down
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