bsd/sys/kpi_mbuf.h

30 	This header defines an API for interacting with mbufs. mbufs are the
33 	mbufs are used to store various items in the networking stack. The
37 	than would fit in an mbuf, external data is used. Most mbufs with
40 	mbufs can be chained, contiguous data in a packet can be found by
90 	@abstract Types of mbufs.
91 	@discussion Some mbufs represent packets, some represnt data waiting
92 		on sockets. Other mbufs store control data or other various
96 		sitting on the queue of free mbufs. If you find that an mbuf you
233 	@field mbufs Number of mbufs (free or otherwise).
245 		Anything smaller than this should be placed in chained mbufs.
253 	u_int32_t	mbufs;		/* mbufs obtained from page pool */
280 		There may be additional data on chained mbufs. The data you're
286 		structure you want to access stradles two mbufs in a chain,
500 		of mbufs will be created. The mbuf type will be set to
506 	@param maxchunks An input/output pointer to the maximum number of mbufs
538 		or more mbufs.  The mbuf type will be set to MBUF_TYPE_DATA.
546 		mbufs segments making up the chain.  On input, if maxchunks is
587 		doesn't touch the rest of the mbufs on the chain.
595 	@discussion Frees a chain of mbufs link through mnext.
605 	@result The number of mbufs freed.
692 	@discussion Move the next len bytes in to mbuf from other mbufs in
741 		affect any other mbufs in a chain.
770 		the data is stored in a chain of mbufs, the data will be copied
787 		If mbuf_copydata is unable to allocate enough mbufs to grow the
795 		bytes, mbufs will be allocated to create the space.
1227 	@param mbuf The mbuf (or chain of mbufs) containing the packet.
1256 	@param mbuf The mbuf (or chain of mbufs) containing the packet.
1296 		of the stack to tag mbufs with data that will travel with the
1299 		Tags may only be added to mbufs with packet headers