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disable multicast loopback on the send socket #6

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Merged
gritsly merged 1 commit into from
Dec 3, 2025
Merged

disable multicast loopback on the send socket #6

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4 changes: 4 additions & 0 deletions proxy/src/forwarder.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -326,6 +326,8 @@ pub fn start_multicast_forwarder_thread(
match try_create_ipv6_socket(ipv6_addr) {
Ok(socket) => {
info!("Successfully bound send socket to IPv6 dual-stack address.");
socket.set_multicast_loop_v6(false)
.expect("Failed to disable IPv6 multicast loopback");
socket
}
Err(e) if e.raw_os_error() == Some(libc::EAFNOSUPPORT) => {
Expand All @@ -335,6 +337,8 @@ pub fn start_multicast_forwarder_thread(
let socket = UdpSocket::bind(ipv4_addr)
.expect("Failed to bind to IPv4 socket after IPv6 failed");
socket.set_multicast_ttl_v4(IP_MULTICAST_TTL).expect("IP_MULTICAST_TTL_V4");
socket.set_multicast_loop_v4(false)
.expect("Failed to disable IPv4 multicast loopback");
socket
}
Err(e) => {
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