Mail Archives: cygwin/2008/09/25/10:28:02
> Hmm, odd, but it's a well known phenomenon. Here's an example showing
> solely the use of cmd.exe and iexplore.exe; Cygwin not involved at all
> except for the diff command at the end.
>
> Microsoft Windows XP [Version 5.1.2600]
> (C) Copyright 1985-2001 Microsoft Corp.
>
> C:\Documents and Settings\dk>netstat -ano > before.txt
>
> C:\Documents and Settings\dk>"\Program Files\Internet
> Explorer\iexplore.exe"
>
> C:\Documents and Settings\dk>netstat -ano > after.txt
>
> C:\Documents and Settings\dk>diff -pu before.txt after.txt
> --- before.txt 2008-09-25 14:28:39.829644300 +0100
> +++ after.txt 2008-09-25 14:28:50.955000300 +0100
> @@ -27,6 +27,7 @@ Active Connections
> UDP 127.0.0.1:1025 *:* 600
> UDP 127.0.0.1:1028 *:*
> 1108 UDP 127.0.0.1:1056 *:*
> 1052 + UDP 127.0.0.1:2301 *:*
> 2388 UDP 127.0.0.1:2584 *:*
> 1580 UDP 192.168.1.150:123 *:*
> 1580 UDP 192.168.1.150:137 *:* 4
>
> C:\Documents and Settings\dk>
>
>
> As you see, even when not showing a page (launching iexplore.exe =
> about:blank on my machine), it has an open UDP socket.
>
> Sorry, I don't have a source right now; I'll keep looking. I'm writing
> off the top of my head, and I just remembered that possibly it's not even a
> loopback connection, it may just be some artifact of windows netstat. I'll
> post again if I can find a reference.
Thanks for the explanation. I am going to test my winsock test program again.
>
> >> It's
> >> used for some kind of internal loopbacky rpc-ish thingy and you can
> >> ignore it.
> >
> > Could you provide me more info about this because it can be quite
> > annoying in a real application ?
>
> What kind of "annoying"? It does no harm and requires no action on your
> part TTBOMK.
Nevermind, i did not test enough to see that one connection did no left one
open udp socket. In my testcase there are no more than 4 udp socket left
open. So i guess there is no problem...
Thanks,
Sylvain
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