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ginuerzh
54ea0220a9
OpenTunnel carries a network: "udp" asks the plugin for a datagram endpoint (one datagram per write) instead of a byte stream, which is what a tun handler needs — a stream endpoint coalesces and splits packets. tcp stays the default, so existing deployments are untouched. The tun handler could not reach client mode without a service forwarder, so a chain with no forwarder now means client mode with an empty dial address: the link is transparent and the peer comes from the chain node (a p2p node's addr is its peer key). That combination used to be dead config, so it is logged. A forwarder still wins when present, and server mode is unchanged. Alongside: the udp dialer no longer hard-asserts *net.UDPConn (a wrapped base dialer yields a plain conn), udp joins the p2p dialer whitelist, and a udp tunnel announces its client with an empty datagram right after dialing — the endpoint learns where to send peer packets only from a packet it receives, so without it a link whose peer speaks first would never come up. Requires plugin v0.7.0 for the new field.