network detection better.

2026-08-03 16:48:29 +02:00
parent 1f9208560f
commit 91c6755bb1
3 changed files with 60 additions and 19 deletions
@@ -14,10 +14,10 @@ interface.
@section{Discovering devices}

@defproc[(upnp-default-ipv4-address) string?]{
-Returns the local IPv4 address selected by the operating system for traffic to
-the SSDP multicast destination @tt{239.255.255.250:1900}. No datagram is sent.
-This is normally the interface through which UPnP devices on the local network
-can be reached.
+Returns a non-loopback local IPv4 address selected by the operating system for
+normal outbound IPv4 traffic. No datagram is sent. The selected address is
+normally also the interface through which SSDP multicast should be sent.
+Loopback and wildcard addresses are rejected.
 }