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Relay: clients of the same relay reach each other behind a 1:1 NAT; logging and extra relay addresses

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
kibi
2026-10-02 00:20:39 +02:00
co-authored by Claude Opus 5.5
parent 1e4bda4e74
commit 2700a4ec3d
6 changed files with 66 additions and 9 deletions
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src/lib/web.svelte.ts
+4 -2
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@@ -168,10 +168,12 @@ export async function relayIce(address: string): Promise<RTCIceServer[]> {
try {
const res = await fetch(`${root}api/relay`);
if (!res.ok) return [];
const c = await res.json() as { port: number; username?: string; credential?: string; ttl?: number };
const c = await res.json() as { port: number; username?: string; credential?: string; ttl?: number; urls?: string[] };
const servers: RTCIceServer[] = [{ urls: `stun:${url.hostname}:${c.port}` }];
// UDP where it is allowed, TCP for networks and browsers that forbid it
if (c.username) servers.push({ urls: [`turn:${url.hostname}:${c.port}?transport=udp`, `turn:${url.hostname}:${c.port}?transport=tcp`], username: c.username, credential: c.credential });
// The operator may name other ways in, such as a TLS front on port 443 for networks that allow nothing else
const direct = [`turn:${url.hostname}:${c.port}?transport=udp`, `turn:${url.hostname}:${c.port}?transport=tcp`];
if (c.username) servers.push({ urls: [...direct, ...(c.urls ?? [])], username: c.username, credential: c.credential });
relays.set(root, { servers, until: Date.now() + Math.max(60, (c.ttl ?? 3600) - 3000) * 1000 });
return servers;
} catch {