Date: Thu, 07 Feb 2008 13:26:13 -0800 From: Sam Leffler <sam@errno.com> To: Biks N <freebsd.dev@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: retrive data from mbuf chain Message-ID: <47AB7775.2040000@errno.com> In-Reply-To: <50cd4e5f0802071222w1222d901o3ce8770b5f5725b4@mail.gmail.com> References: <50cd4e5f0802071222w1222d901o3ce8770b5f5725b4@mail.gmail.com>
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Biks N wrote:
> Hi,
>
> I am new to FreeBSD kernel programming.
>
> Currently I am trying to work on mbuf data manupulation.
>
> >From my understanding: data (payload) is stored into one or more mufs
> which are chained together through m_next pointer.
>
> Now, I need to retrive all data in mbuf chain ( mbufs linked by
> m_next). I am working ip_output() in netinet/ip_output.c
>
> Does there exist inbuilt function/macro to retrive all the data in mbuf chain?
>
man 9 mbuf; look for m_copydata.
Sam
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