mbuf.h revision 78189
178189Sbrian/*- 278189Sbrian * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org> 378189Sbrian * based on work by Toshiharu OHNO <tony-o@iij.ad.jp> 478189Sbrian * Internet Initiative Japan, Inc (IIJ) 578189Sbrian * All rights reserved. 66059Samurai * 778189Sbrian * Redistribution and use in source and binary forms, with or without 878189Sbrian * modification, are permitted provided that the following conditions 978189Sbrian * are met: 1078189Sbrian * 1. Redistributions of source code must retain the above copyright 1178189Sbrian * notice, this list of conditions and the following disclaimer. 1278189Sbrian * 2. Redistributions in binary form must reproduce the above copyright 1378189Sbrian * notice, this list of conditions and the following disclaimer in the 1478189Sbrian * documentation and/or other materials provided with the distribution. 156059Samurai * 1678189Sbrian * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1778189Sbrian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1878189Sbrian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1978189Sbrian * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2078189Sbrian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2178189Sbrian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2278189Sbrian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2378189Sbrian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2478189Sbrian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2578189Sbrian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2678189Sbrian * SUCH DAMAGE. 276059Samurai * 2850479Speter * $FreeBSD: head/usr.sbin/ppp/mbuf.h 78189 2001-06-13 21:52:19Z brian $ 296059Samurai */ 306059Samurai 316059Samuraistruct mbuf { 3254912Sbrian size_t m_size; /* size allocated (excluding header) */ 3354912Sbrian short m_offset; /* offset from header end to start position */ 3454912Sbrian size_t m_len; /* available byte count in buffer */ 3554912Sbrian short m_type; /* MB_* below */ 3654912Sbrian struct mbuf *m_next; /* link to next mbuf */ 3754912Sbrian struct mbuf *m_nextpkt; /* link to next packet */ 3838472Sbrian /* buffer space is malloc()d directly after the header */ 396059Samurai}; 406059Samurai 416059Samuraistruct mqueue { 426059Samurai struct mbuf *top; 436059Samurai struct mbuf *last; 4454912Sbrian size_t len; 456059Samurai}; 466059Samurai 4746828Sbrian#define MBUF_CTOP(bp) \ 4854912Sbrian ((bp) ? (u_char *)((bp)+1) + (bp)->m_offset : NULL) 496059Samurai 5046828Sbrian#define CONST_MBUF_CTOP(bp) \ 5154912Sbrian ((bp) ? (const u_char *)((bp)+1) + (bp)->m_offset : NULL) 5246828Sbrian 5347695Sbrian#define MB_IPIN 0 5447695Sbrian#define MB_IPOUT 1 5550059Sbrian#define MB_NATIN 2 5650059Sbrian#define MB_NATOUT 3 5747695Sbrian#define MB_MPIN 4 5847695Sbrian#define MB_MPOUT 5 5947695Sbrian#define MB_VJIN 6 6047695Sbrian#define MB_VJOUT 7 6147695Sbrian#define MB_ICOMPDIN 8 6247695Sbrian#define MB_ICOMPDOUT 9 6347695Sbrian#define MB_COMPDIN 10 6447695Sbrian#define MB_COMPDOUT 11 6547695Sbrian#define MB_LQRIN 12 6647695Sbrian#define MB_LQROUT 13 6747695Sbrian#define MB_ECHOIN 14 6847695Sbrian#define MB_ECHOOUT 15 6947695Sbrian#define MB_PROTOIN 16 7047695Sbrian#define MB_PROTOOUT 17 7147695Sbrian#define MB_ACFIN 18 7247695Sbrian#define MB_ACFOUT 19 7347695Sbrian#define MB_SYNCIN 20 7447695Sbrian#define MB_SYNCOUT 21 7547695Sbrian#define MB_HDLCIN 22 7647695Sbrian#define MB_HDLCOUT 23 7747695Sbrian#define MB_ASYNCIN 24 7847695Sbrian#define MB_ASYNCOUT 25 7947695Sbrian#define MB_CBCPIN 26 8047695Sbrian#define MB_CBCPOUT 27 8147695Sbrian#define MB_CHAPIN 28 8247695Sbrian#define MB_CHAPOUT 29 8347695Sbrian#define MB_PAPIN 30 8447695Sbrian#define MB_PAPOUT 31 8547695Sbrian#define MB_CCPIN 32 8647695Sbrian#define MB_CCPOUT 33 8747695Sbrian#define MB_IPCPIN 34 8847695Sbrian#define MB_IPCPOUT 35 8947695Sbrian#define MB_LCPIN 36 9047695Sbrian#define MB_LCPOUT 37 9147695Sbrian#define MB_UNKNOWN 38 9247695Sbrian#define MB_MAX MB_UNKNOWN 936059Samurai 9468596Sbrian#define M_MAXLEN (4352 - sizeof(struct mbuf)) /* > HDLCSIZE */ 9554913Sbrian 9636285Sbrianstruct cmdargs; 9736285Sbrian 9854912Sbrianextern int m_length(struct mbuf *); 9954912Sbrianextern struct mbuf *m_get(size_t, int); 10054912Sbrianextern struct mbuf *m_free(struct mbuf *); 10154912Sbrianextern void m_freem(struct mbuf *); 10246686Sbrianextern void mbuf_Write(struct mbuf *, const void *, size_t); 10346686Sbrianextern struct mbuf *mbuf_Read(struct mbuf *, void *, size_t); 10446686Sbrianextern size_t mbuf_View(struct mbuf *, void *, size_t); 10554912Sbrianextern struct mbuf *m_prepend(struct mbuf *, const void *, size_t, size_t); 10654912Sbrianextern struct mbuf *m_adj(struct mbuf *, ssize_t); 10754912Sbrianextern struct mbuf *m_pullup(struct mbuf *); 10854912Sbrianextern void m_settype(struct mbuf *, int); 10955353Sbrianextern struct mbuf *m_append(struct mbuf *, const void *, size_t); 11054912Sbrian 11136285Sbrianextern int mbuf_Show(struct cmdargs const *); 11254912Sbrian 11354912Sbrianextern void m_enqueue(struct mqueue *, struct mbuf *); 11454912Sbrianextern struct mbuf *m_dequeue(struct mqueue *); 115