In message <[EMAIL PROTECTED]>, you wrote: > >On Mon, 23 Feb 2004, Ronald F. Guilmette wrote: > >> Given a socket which has been properly created, opened, and then bound >> to some port and the special INADDR_ANY ``wildcard'' address, I need to >> be able to them programatically find all of the IPv4 addresses that the >> socket was just bound to. >> >> Can anyone suggest a way to do this? >> >> Can anyone suggest a way to do this easily? >> >> Can anyone suggest a way to do this portably? > >In another e-mail, it's recommended that you try out getifaddrs(). This >is almost certainly the best thing to do, but I wanted to point out one >thing about the question you asked: when you bind a socket to INADDR_ANY, >you're actually not saying "bind to all addresses available at the moment >of binding", you're saying "bind to all addresses available at the moment >of comparison". I.e., the PCB in kernel retains the value INADDR_ANY, and >will match new IP addresses added to interfaces at some later time also.
Thank you for pointing that out. I certainly did not know that interesting fact. For me at least, this distinction is rarely important in practice, because I personally don't tend to ifconfig new interfaces all that often... like hardly ever... but it is Good for me to know the implications of what you just said. _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
