Re: Help in debugging ACF connection issue

[Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov>]

On 4/13/26 7:58 AM, Érico Nogueira Rolim via Tech-talk wrote:

... does PVXS support dynamic discovery of network interfaces?

In part, for some configurations.  Enough for my laptop to roam and have pvxmonitor reconnect when I get home.  Interface (re)discovery is there[1].  However, at present auto-address list expansion[2] only happens once at server or client creation.  So the list of UDP broadcast addresses is the practical limitation.  Binding to specific interface addresses is of course also a problem (IP_FREEBIND is not portable).

[1] the IfaceMap API is backed by a worker thread which periodically polls interface info.

https ://github.com/epics-base/pvxs/blob/1d481d5be1db1e1bcc934c82a8bcec162c3ac31f/src/evhelper.h#L306

[2] expandAddrList() https ://github.com/epics-base/pvxs/blob/1d481d5be1db1e1bcc934c82a8bcec162c3ac31f/src/config.cpp#L284