[En-Nut-Discussion] error in ipin.c?!

[ivesworking]

according to IANA, IP 224.0.0.0 through 239.255.255.255 is multicast address 
which do not need to perform ICMP,
http://www.iana.org/assignments/multicast-addresses
for detail we may need expert to answer.
For receive multicast, the network driver need to patch. ( this one i sure)


Wfloh

----- Original Message ----- 
From: "ivesworking" <ivesworking at hotmail.com>
To: "Ethernut User Chat (English)" <en-nut-discussion at egnite.de>
Sent: Friday, June 09, 2006 3:28 AM
Subject: Re: [En-Nut-Discussion] error in ipin.c?!


>i able to perform multicast with Nut OS
> the key point is modify the driver & IPin.c
>
> wfloh
> ----- Original Message ----- 
> From: <llsoft at quantentunnel.de>
> To: <en-nut-discussion at egnite.de>
> Sent: Thursday, June 08, 2006 7:46 PM
> Subject: [En-Nut-Discussion] error in ipin.c?!
>
>
>> Hi,
>>
>> currently I'm extending Nut/Net for multicast.
>> I found maybe an error in "ipin.c"
>>
>> In function NutIpInput an ICMP response 'unreachable protocol' is sent if 
>> the protocol is unknown.
>> According to RFC 1122, section 3.2.2, no icmp response should be sent if 
>> destination address was broadcast or multicast.
>> Therefore, almost at the end of the function, the line before freeing the 
>> net buffer
>>
>> if (!NutIcmpResponse(ICMP_UNREACH, ICMP_UNREACH_PROTOCOL, 0, nb))
>>
>> should be changed to
>>
>> if (bcast || !NutIcmpResponse(ICMP_UNREACH, ICMP_UNREACH_PROTOCOL, 0, 
>> nb))
>>
>>
>> Am I right?
>>
>> Jan
>>
>> -- 
>>
>>
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