[Winpcap-users] winpcap captures packet,
but winsock doesn't see it
gianluca.varenni at cacetech.com
Wed Jan 7 19:41:59 GMT 2009
It's definitely not a NIC issue. The TCP/IP protocol driver is rejecting
that packet for some reason that doesn't come to my mind at the moment.
What is the MAC src and destination addresses that you are using?
----- Original Message -----
From: "Coleman Brumley" <coleman.brumley at jandasoft.biz>
To: <winpcap-users at winpcap.org>
Sent: Tuesday, January 06, 2009 1:47 PM
Subject: [Winpcap-users] winpcap captures packet, but winsock doesn't see it
> Hello all.
> I have a strange problem and I was hoping someone could point me in the
> right direction.
> I have an issue where 2 IP endpoints are configured as 126.96.36.199 and
> 188.8.131.52 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
> 184.108.40.206. Device B (an embedded device) replies to that broadcast
> another broadcast to 220.127.116.11. Wireshark/Winpcap is running on the
> 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
> 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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> Winpcap-users at winpcap.org
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