I would definitely try using a WinPcap based application. I wonder if the TCP/IP stack in Windows 7 drops a packet with a TTL = 0.
Have a nice day GV From: Alberto Avanzi Sent: Wednesday, September 01, 2010 8:49 AM To: [email protected] Subject: Re: [Winpcap-users] Multicast packets with TTL=0 reception problem under Windows Seven Hi Gianluca, thanks for your reply. No, they are sent by a standard WinSock-based application. If it matters, we could move to a WinPCap-based sender... Best regards, Alberto. On 01/09/2010 17:46, Gianluca Varenni wrote: Is the packet sent by another WinPcap-based application? Have a nice day GV From: Alberto Avanzi Sent: Wednesday, September 01, 2010 2:55 AM To: [email protected] Subject: Re: [Winpcap-users] Multicast packets with TTL=0 reception problem under Windows Seven Just to confirm that it doesn't come from our (receiving) code (from our sending code maybe ?): even the WinPCap 4.1.2 "UDPDump" provided example fails to retrieve these packets. A. On 01/09/2010 11:09, Alberto Avanzi wrote: Hi, our multicast-receiving application is based, since some years, on WinPCap. We use it under Windows XP and Windows Server 2003, and it works well for receiving multicast packets independently from their TTL (0, 1 or 2) (with WinPCap 4.0.2). The same application running on Seven (with WinPCap 4.1.2) is unable to receive packets with TTL = 0 (sent by another application on the same machine). It is clearly a reception problem, because if we use standard socket code for receiving packets, we get them. If we set the TTL=1, we receive the packets. Any idea ? Should we modify something in our code in order to get them again ? Thanks a lot, Alberto. _______________________________________________ Winpcap-users mailing list [email protected] https://www.winpcap.org/mailman/listinfo/winpcap-users ------------------------------------------------------------------------------ _______________________________________________ Winpcap-users mailing list [email protected] https://www.winpcap.org/mailman/listinfo/winpcap-users _______________________________________________ Winpcap-users mailing list [email protected] https://www.winpcap.org/mailman/listinfo/winpcap-users -------------------------------------------------------------------------------- _______________________________________________ Winpcap-users mailing list [email protected] https://www.winpcap.org/mailman/listinfo/winpcap-users
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