Date: Thu, 7 Feb 2008 13:41:14 -0800 From: "Singh, Vijay" <Vijay.Singh@netapp.com> To: "Biks N" <freebsd.dev@gmail.com>, "Sam Leffler" <sam@errno.com> Cc: freebsd-hackers@freebsd.org Subject: RE: retrive data from mbuf chain Message-ID: <8B3BF7A02B910640AB146A919AB36594054A71E1@exsvl03.hq.netapp.com> In-Reply-To: <50cd4e5f0802071338h63b4fcbax9ceb9643aa5d7504@mail.gmail.com> References: <50cd4e5f0802071222w1222d901o3ce8770b5f5725b4@mail.gmail.com><47AB7775.2040000@errno.com> <50cd4e5f0802071338h63b4fcbax9ceb9643aa5d7504@mail.gmail.com>
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>From the entire chain. best regards, Vijay =20 > -----Original Message----- > From: Biks N [mailto:freebsd.dev@gmail.com]=20 > Sent: Thursday, February 07, 2008 1:38 PM > To: Sam Leffler > Cc: freebsd-hackers@freebsd.org > Subject: Re: retrive data from mbuf chain >=20 > On Feb 7, 2008 3:26 PM, Sam Leffler <sam@errno.com> wrote: > > > > 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=20 > > > >mufs > > > which are chained together through m_next pointer. > > > > > > Now, I need to retrive all data in mbuf chain ( mbufs linked by=20 > > > m_next). I am working ip_output() in netinet/ip_output.c > > > > > > Does there exist inbuilt function/macro to retrive all=20 > the data in mbuf chain? > > > > > > > man 9 mbuf; look for m_copydata. >=20 >=20 > m_copydata(mbuf, offset, len, buf) >=20 > Will it copy data from entire "mbuf chain" or just from the=20 > current mbuf ? >=20 > Thanks for your help >=20 >=20 > > > > Sam > > > > > _______________________________________________ > freebsd-hackers@freebsd.org mailing list=20 > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to=20 > "freebsd-hackers-unsubscribe@freebsd.org" >=20
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