On Dec 21, 2004, at 2:14 AM, Thierry Arbellot wrote:
put "255.255.255.255:43222" into testSocket
open datagram socket to testSocket
put hostAddress(testSocket) into theIPAddress
close socket testSocket
I don't know what different systems might do if there are multiple network adaptors or multiple subnet and IP addresses to any network adaptor. One might assume the primary IP address is used, whatever that means.
Perhaps for the the problem at hand, it might be safest to use the IP address of something on the LAN that is fixed, such as a router or server. That way you always get the IP address to the right LAN: the adaptor and the right subnet.
That is, if router 172.17.0.1 is on the same subnet under consideration, then the line might be:
put "172.17.0.1:444222" into testSocket
The port can be anything; this method does not put any TCP/IP activity on the network.
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