DIG NAT traversal — abstract peer connection over UPnP/IGD, PCP (RFC 6887), NAT-PMP, direct (port-forwarded), with relay.dig.net as last-resort fallback. One connect() API; the traversal method is transparent to callers.
WebRTC ICE connectivity in PHP, ported to Amp v3 fibers and sockets. MadelineProto's PHP 8.2+ fork integrates the modular danog/php-rtc STUN, TURN, and mDNS stack.
STUN transactions and NAT discovery for PHP, ported to Amp v3 sockets and fibers. MadelineProto's PHP 8.2+ fork supports the modular danog/php-rtc stack.