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webrtc: stop gathering link-local IPv6 host candidates

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fe80::/10 can only be bound together with a scope id, which the gathered address list
drops before it reaches the bind, so every link-local address yields nothing but a failed
bind and a warning line - seven of them per session on a macOS host.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019UzcMTdYTEv2QbMHcTSUy3
This commit is contained in:
rustdesk
2026-08-25 13:59:52 +08:00
parent 6b8182ed38
commit 7ea29baacf
1 changed files with 7 additions and 0 deletions
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src/webrtc.rs
+7
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@@ -566,6 +566,13 @@ impl WebRTCStream {
let mut s = SettingEngine::default();
s.detach_data_channels();
s.set_ice_multicast_dns_mode(MulticastDnsMode::Disabled);
// fe80::/10 can only be bound together with a scope id, which `IpAddr` cannot carry, so
// gathering one never yields a candidate - only a failed bind and a warning per address.
// Spelled out because `is_unicast_link_local` is not stable on our MSRV.
s.set_ip_filter(Box::new(|ip: IpAddr| match ip {
IpAddr::V6(v6) => v6.segments()[0] & 0xffc0 != 0xfe80,
IpAddr::V4(_) => true,
}));
// Create the API object
let api = APIBuilder::new().with_setting_engine(s).build();