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

[Alberto Avanzi]

  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.
>>
>>
>>
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>> Winpcap-users at winpcap.org
>> https://www.winpcap.org/mailman/listinfo/winpcap-users
>
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