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

[Gianluca Varenni]

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: winpcap-users at winpcap.org 
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: 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.




_______________________________________________
Winpcap-users mailing list
Winpcap-users at winpcap.org
https://www.winpcap.org/mailman/listinfo/winpcap-users


------------------------------------------------------------------------------
  _______________________________________________
  Winpcap-users mailing list
  Winpcap-users at winpcap.org
  https://www.winpcap.org/mailman/listinfo/winpcap-users


_______________________________________________
Winpcap-users mailing list
Winpcap-users at winpcap.org
https://www.winpcap.org/mailman/listinfo/winpcap-users


--------------------------------------------------------------------------------


_______________________________________________
Winpcap-users mailing list
Winpcap-users at winpcap.org
https://www.winpcap.org/mailman/listinfo/winpcap-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.winpcap.org/pipermail/winpcap-users/attachments/20100901/1da2f0a6/attachment-0001.htm