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Re: [lwip-devel] [lwip-commits] lwip/src/core/ipv6 ip6.c
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From: |
Ivan Delamer |
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Subject: |
Re: [lwip-devel] [lwip-commits] lwip/src/core/ipv6 ip6.c |
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Date: |
Mon, 27 Jun 2011 02:31:01 -0600 (MDT) |
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User-agent: |
SquirrelMail/1.4.9a |
> Ivan Delamer wrote:
>> Modified files:
>> src/core/ipv6 : ip6.c
>>
>> Log message:
>> Don't forward IPv6 packets that are larger than outgoing MTU, send
>> ICMPv6 message back for Path MTU discovery.
>
> I think this is a problem for IPv4, too. Shouldn't we call ip(6)_frag()
> if the mtu is exceeded?
>
> Simon
It's a bit different in IPv6, routers are not allowed to fragment packets.
The specified behavior is called "Path MTU", if a router can't forward a
packet it must return an ICMPv6 message and the source must fragment (or
discard).
It's OK to call ip_frag in IPv4 as AKAIK.