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293 lines
9.1 KiB
C
293 lines
9.1 KiB
C
/*-
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*
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* ===================================
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* HARP | Host ATM Research Platform
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* ===================================
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*
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*
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* This Host ATM Research Platform ("HARP") file (the "Software") is
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* made available by Network Computing Services, Inc. ("NetworkCS")
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* "AS IS". NetworkCS does not provide maintenance, improvements or
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* support of any kind.
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*
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* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
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* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
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* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
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* In no event shall NetworkCS be responsible for any damages, including
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* but not limited to consequential damages, arising from or relating to
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* any use of the Software or related support.
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*
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* Copyright 1994-1998 Network Computing Services, Inc.
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*
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* Copies of this Software may be made, however, the above copyright
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* notice must be reproduced on all copies.
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*
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* @(#) $FreeBSD$
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*
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*/
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/*
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* System Configuration
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* --------------------
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*
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* Porting aides
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*
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*/
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#ifndef _NETATM_PORT_H
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#define _NETATM_PORT_H
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#ifdef _KERNEL
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/*
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* Kernel buffers
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*
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* KBuffer Typedef for a kernel buffer.
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*
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* KB_NEXT(bfr) Access next buffer in chain (r/w).
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* KB_LEN(bfr) Access length of data in this buffer (r/w).
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* KB_QNEXT(bfr) Access next buffer in queue (r/w).
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*
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* KB_ALLOC(bfr, size, flags, type)
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* Allocates a new kernel buffer of at least size bytes.
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* KB_ALLOCPKT(bfr, size, flags, type)
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* Allocates a new kernel packet header buffer of at
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* least size bytes.
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* KB_ALLOCEXT(bfr, size, flags, type)
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* Allocates a new kernel buffer with external storage
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* of at least size bytes.
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* KB_FREEONE(bfr, nxt) Free buffer bfr and set next buffer in chain in nxt.
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* KB_FREEALL(bfr) Free bfr's entire buffer chain.
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* KB_COPY(bfr, off, len, new, flags)
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* Copy len bytes of user data from buffer bfr starting at
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* byte offset off and return new buffer chain in new.
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* If len is KB_COPYALL, copy until end of chain.
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* KB_COPYDATA(bfr, off, len, datap)
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* Copy data from buffer bfr starting at byte offset off
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* for len bytes into the data area pointed to by datap.
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* Returns the number of bytes not copied to datap.
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* KB_PULLUP(bfr, n, new)
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* Get at least the first n bytes of data in the buffer
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* chain headed by bfr contiguous in the first buffer.
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* Returns the (potentially new) head of the chain in new.
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* On failure the chain is freed and NULL is returned.
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* KB_LINKHEAD(new, head)
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* Link the kernel buffer new at the head of the buffer
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* chain headed by head. If both new and head are
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* packet header buffers, new will become the packet
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* header for the chain.
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* KB_LINK(new, prev)
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* Link the kernel buffer new into the buffer chain
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* after the buffer prev.
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* KB_UNLINKHEAD(head, next)
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* Unlink the kernel buffer from the head of the buffer
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* chain headed by head. The buffer head will be freed
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* and the new chain head will be placed in next.
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* KB_UNLINK(old, prev, next)
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* Unlink the kernel buffer old with previous buffer prev
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* from its buffer chain. The following buffer in the
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* chain will be placed in next and the buffer old will
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* be freed.
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* KB_ISPKT(bfr) Tests whether bfr is a packet header buffer.
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* KB_ISEXT(bfr) Tests whether bfr has external storage.
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* KB_BFRSTART(bfr, x, t)
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* Sets x (cast to type t) to point to the start of the
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* buffer space in bfr.
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* KB_BFREND(bfr, x, t)
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* Sets x (cast to type t) to point one byte past the end
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* of the buffer space in bfr.
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* KB_BFRLEN(bfr) Returns length of buffer space in bfr.
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* KB_DATASTART(bfr, x, t)
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* Sets x (cast to type t) to point to the start of the
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* buffer data contained in bfr.
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* KB_DATAEND(bfr, x, t)
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* Sets x (cast to type t) to point one byte past the end
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* of the buffer data contained in bfr.
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* KB_HEADSET(bfr, n) Sets the start address for buffer data in buffer bfr to
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* n bytes from the beginning of the buffer space.
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* KB_HEADMOVE(bfr, n) Adjust buffer data controls to move data down (n > 0)
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* or up (n < 0) n bytes in the buffer bfr.
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* KB_HEADADJ(bfr, n) Adjust buffer data controls to add (n > 0) or subtract
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* (n < 0) n bytes of data to/from the beginning of bfr.
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* KB_TAILADJ(bfr, n) Adjust buffer data controls to add (n > 0) or subtract
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* (n < 0) n bytes of data to/from the end of bfr.
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* KB_TAILALIGN(bfr, n) Set buffer data controls to place an object of size n
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* at the end of bfr, longword aligned.
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* KB_HEADROOM(bfr, n) Set n to the amount of buffer space available before
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* the start of data in bfr.
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* KB_TAILROOM(bfr, n) Set n to the amount of buffer space available after
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* the end of data in bfr.
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* KB_PLENGET(bfr, n) Set n to bfr's packet length.
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* KB_PLENSET(bfr, n) Set bfr's packet length to n.
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* KB_PLENADJ(bfr, n) Adjust total packet length by n bytes.
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*
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*/
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#include <sys/mbuf.h>
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typedef struct mbuf KBuffer;
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#define KB_F_WAIT M_TRYWAIT
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#define KB_F_NOWAIT M_DONTWAIT
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#define KB_T_HEADER MT_HEADER
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#define KB_T_DATA MT_DATA
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#define KB_COPYALL M_COPYALL
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#define KB_NEXT(bfr) (bfr)->m_next
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#define KB_LEN(bfr) (bfr)->m_len
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#define KB_QNEXT(bfr) (bfr)->m_nextpkt
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#define KB_ALLOC(bfr, size, flags, type) { \
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if ((size) <= MLEN) { \
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MGET((bfr), (flags), (type)); \
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} else \
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(bfr) = NULL; \
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}
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#define KB_ALLOCPKT(bfr, size, flags, type) { \
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if ((size) <= MHLEN) { \
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MGETHDR((bfr), (flags), (type)); \
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} else \
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(bfr) = NULL; \
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}
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#define KB_ALLOCEXT(bfr, size, flags, type) { \
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if ((size) <= MCLBYTES) { \
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MGET((bfr), (flags), (type)); \
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if ((bfr) != NULL) { \
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MCLGET((bfr), (flags)); \
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if (((bfr)->m_flags & M_EXT) == 0) { \
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m_freem((bfr)); \
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(bfr) = NULL; \
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} \
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} \
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} else \
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(bfr) = NULL; \
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}
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#define KB_FREEONE(bfr, nxt) { \
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(nxt) = m_free(bfr); \
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}
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#define KB_FREEALL(bfr) { \
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m_freem(bfr); \
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}
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#define KB_COPY(bfr, off, len, new, flags) { \
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(new) = m_copym((bfr), (off), (len), (flags)); \
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}
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#define KB_COPYDATA(bfr, off, len, datap) \
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(m_copydata((bfr), (off), (len), (datap)), 0)
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#define KB_PULLUP(bfr, n, new) { \
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(new) = m_pullup((bfr), (n)); \
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}
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#define KB_LINKHEAD(new, head) { \
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if ((head) && KB_ISPKT(new) && KB_ISPKT(head)) {\
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M_MOVE_PKTHDR((new), (head)); \
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} \
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(new)->m_next = (head); \
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}
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#define KB_LINK(new, prev) { \
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(new)->m_next = (prev)->m_next; \
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(prev)->m_next = (new); \
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}
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#define KB_UNLINKHEAD(head, next) { \
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(next) = m_free((head)); \
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(head) = NULL; \
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}
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#define KB_UNLINK(old, prev, next) { \
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(next) = m_free((old)); \
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(old) = NULL; \
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(prev)->m_next = (next); \
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}
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#define KB_ISPKT(bfr) (((bfr)->m_flags & M_PKTHDR) != 0)
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#define KB_ISEXT(bfr) (((bfr)->m_flags & M_EXT) != 0)
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#define KB_BFRSTART(bfr, x, t) { \
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if ((bfr)->m_flags & M_EXT) \
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(x) = (t)((bfr)->m_ext.ext_buf); \
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else if ((bfr)->m_flags & M_PKTHDR) \
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(x) = (t)(&(bfr)->m_pktdat); \
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else \
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(x) = (t)((bfr)->m_dat); \
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}
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#define KB_BFREND(bfr, x, t) { \
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if ((bfr)->m_flags & M_EXT) \
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(x) = (t)((bfr)->m_ext.ext_buf + (bfr)->m_ext.ext_size);\
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else if ((bfr)->m_flags & M_PKTHDR) \
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(x) = (t)(&(bfr)->m_pktdat + MHLEN); \
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else \
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(x) = (t)((bfr)->m_dat + MLEN); \
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}
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#define KB_BFRLEN(bfr) \
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(((bfr)->m_flags & M_EXT) ? (bfr)->m_ext.ext_size : \
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(((bfr)->m_flags & M_PKTHDR) ? MHLEN : MLEN))
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#define KB_DATASTART(bfr, x, t) { \
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(x) = mtod((bfr), t); \
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}
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#define KB_DATAEND(bfr, x, t) { \
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(x) = (t)(mtod((bfr), caddr_t) + (bfr)->m_len); \
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}
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#define KB_HEADSET(bfr, n) { \
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if ((bfr)->m_flags & M_EXT) \
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(bfr)->m_data = (bfr)->m_ext.ext_buf + (n); \
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else if ((bfr)->m_flags & M_PKTHDR) \
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(bfr)->m_data = (bfr)->m_pktdat + (n); \
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else \
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(bfr)->m_data = (bfr)->m_dat + (n); \
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}
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#define KB_HEADMOVE(bfr, n) { \
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(bfr)->m_data += (n); \
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}
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#define KB_HEADADJ(bfr, n) { \
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(bfr)->m_len += (n); \
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(bfr)->m_data -= (n); \
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}
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#define KB_TAILADJ(bfr, n) { \
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(bfr)->m_len += (n); \
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}
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#define KB_TAILALIGN(bfr, n) { \
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(bfr)->m_len = (n); \
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if ((bfr)->m_flags & M_EXT) \
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(bfr)->m_data = (caddr_t)(((uintptr_t)(bfr)->m_ext.ext_buf \
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+ (bfr)->m_ext.ext_size - (n)) & ~(sizeof(long) - 1));\
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else \
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(bfr)->m_data = (caddr_t)(((uintptr_t)(bfr)->m_dat + MLEN - (n)) \
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& ~(sizeof(long) - 1)); \
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}
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#define KB_HEADROOM(bfr, n) { \
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/* N = m_leadingspace(BFR) XXX */ \
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(n) = ((bfr)->m_flags & M_EXT ? (bfr)->m_data - (bfr)->m_ext.ext_buf : \
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(bfr)->m_flags & M_PKTHDR ? (bfr)->m_data - (bfr)->m_pktdat : \
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(bfr)->m_data - (bfr)->m_dat); \
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}
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#define KB_TAILROOM(bfr, n) { \
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(n) = M_TRAILINGSPACE(bfr); \
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}
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#define KB_PLENGET(bfr, n) { \
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(n) = (bfr)->m_pkthdr.len; \
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}
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#define KB_PLENSET(bfr, n) { \
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(bfr)->m_pkthdr.len = (n); \
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}
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#define KB_PLENADJ(bfr, n) { \
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(bfr)->m_pkthdr.len += (n); \
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}
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/*
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* Kernel time
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*
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* KTimeout_ret Typedef for timeout() function return
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*
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* KT_TIME(t) Sets t to the current time.
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*
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*/
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typedef void KTimeout_ret;
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#define KT_TIME(t) microtime(&t)
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#endif /* _KERNEL */
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#ifndef MAX
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#define MAX(a,b) max((a),(b))
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#endif
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#ifndef MIN
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#define MIN(a,b) min((a),(b))
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#endif
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#endif /* _NETATM_PORT_H */
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