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Fabian Stehle f3b80b2886 fix: wrap IPv6 addresses in brackets in UDP TURN URLs (RFC 3986) (#4476 )

`iceServersForParticipant` builds UDP TURN URLs by interpolating the
node IP directly into a format string:

    fmt.Sprintf("turn:%s:%d?transport=udp", ip, port)

When `NodeIP.V6` is set, `ToStringSlice()` includes the bare IPv6
address, producing URLs like:

    turn:2a05:d014:ee4:1201:7039:38c:f652:a252:443?transport=udp

RFC 3986 §3.2.2 requires IPv6 addresses in URIs to be enclosed in
square brackets. Without them the port is ambiguous and WebRTC clients
(e.g. libdatachannel) reject the URL with "Invalid ICE server port".

Use `net.JoinHostPort` which handles bracketing for IPv6 and is a
no-op for IPv4, producing well-formed URLs:

    turn:[2a05:d014:ee4:1201:7039:38c:f652:a252]:443?transport=udp
    turn:1.2.3.4:443?transport=udp

2026-04-24 14:28:25 +05:30

agent

Switch to stdlib maps, slices (#4445 )

2026-04-13 00:11:48 +05:30

clientconfiguration

chore: move codecs/mime stuff to protocol (#4255 )

2026-01-20 20:54:32 +05:30

config

fix: limit join request and WHIP request body to http.DefaultMaxHeaderBytes (#4450 )

2026-04-16 01:12:33 +05:30

metric

Update mediatransportutil (#4115 )