[Winpcap-users] winpcap captures packet, but winsock doesn't see it
coleman.brumley at jandasoft.biz
Tue Jan 6 21:47:00 GMT 2009
I have a strange problem and I was hoping someone could point me in the
I have an issue where 2 IP endpoints are configured as 188.8.131.52 and
184.108.40.206 with subnet masks of 255.255.192.0. They are connected via a
switch. I'm not sure of the switch manufacturer.
Device A (a WinXP PC running a Winsock application) sends a UDP broadcast to
220.127.116.11. Device B (an embedded device) replies to that broadcast with
another broadcast to 18.104.22.168. Wireshark/Winpcap is running on the PC.
Wireshark captures the reply, but the reply doesn't get to the Winsock app
running on Device A. It's like the app just never received the packet (i.e.
recvfrom doesn't indicate that any data has been received).
I'm unable to duplicate this behavior in my similar environment, so
something tells me it's the PC in question or some other hardware issue
(something with the NIC driver?).
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