Added iauth mod_external - #88
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Added a new
externaliauth module that communicates with an external authentication service over a persistent TCP connection.For each client, the module sends a
CONNrequest containing the available connection and authentication information, including IP address, hostname, ident, SASL username and, when available, the complete NICK/USER registration data. The external service can respond withALLOW,DENYorRAW.The module uses the newly introduced global connection lifecycle to maintain a non-blocking persistent connection, including output queueing and automatic reconnect handling.
It supports configurable backend host and port, connection source IP, request timeout, server identifier and fail-open/fail-closed timeout behavior. Connections from local and private networks can be excluded from external authentication.
The module is integrated into the iauth module configuration and build system.