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

[Alberto Avanzi]

  Ok, I will try it and keep you informed.

Thanks,
A.

On 01/09/2010 20:47, Gianluca Varenni wrote:
> 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 <mailto:alberto.avanzi at keeneo.com>
> *Sent:* Wednesday, September 01, 2010 8:49 AM
> *To:* winpcap-users at winpcap.org <mailto: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 <mailto:alberto.avanzi at keeneo.com>
>> *Sent:* Wednesday, September 01, 2010 2:55 AM
>> *To:* winpcap-users at winpcap.org <mailto: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
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