Modern browsers obfuscate local IP addresses with mDNS hostnames (e.g. abcdef12-3456.local) for privacy. When mDNS resolution is unavailable on the LAN, WebRTC ICE candidates cannot be resolved and the peer connection fails. This fix makes the signaling server extract each client's real IP from the TCP connection and share it via Welcome/PeerJoined messages. The client then replaces any .local mDNS addresses in SDP offers, answers, and trickle ICE candidates with the peer's actual IP address, enabling direct IP connectivity without relying on mDNS. https://claude.ai/code/session_01EZrFdyAR35RLwRdHUA9zPJ |
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