Subject: Re: m_copy - doesn't copy if M_EXT is set.
To: Ignatios Souvatzis <email@example.com>
From: None <firstname.lastname@example.org>
Date: 10/09/1999 17:46:42
>> This is also the reason why m_pullup() always copies the header out of a
>> cluster even if the header was originally contiguous in the cluster.
>Hm. This should be documented.
>And we should have a M_REALPULLUP macro that does no copy unless necessary.
>But I guess this should wait until Itojun specifies what he needs to make
>IPv6 work with mbuf chains.
For IPv6 chained headers, m_pullup is not really useful. We should
write a code that handles non-contiguous headers (for example,
do not use struct tcpiphdr). I've been trying to figure out
what is the best route, I'll try to test something locally.