[Winpcap-users] Multicast packets with TTL=0 reception problem under Windows Seven

[Gianluca Varenni]

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: winpcap-users at winpcap.org 
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.




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