1/*- 2 * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org> 3 * based on work by Toshiharu OHNO <tony-o@iij.ad.jp> 4 * Internet Initiative Japan, Inc (IIJ) 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: src/usr.sbin/ppp/mbuf.h,v 1.29.26.1 2010/12/21 17:10:29 kensmith Exp $ 29 */ 30 31struct mbuf { 32 size_t m_size; /* size allocated (excluding header) */ 33 u_short m_offset; /* offset from header end to start position */ 34 size_t m_len; /* available byte count in buffer */ 35 short m_type; /* MB_* below */ 36 struct mbuf *m_next; /* link to next mbuf */ 37 struct mbuf *m_nextpkt; /* link to next packet */ 38 unsigned long priv; /* private data - holds HDLC escape count */ 39 /* buffer space is malloc()d directly after the header */ 40}; 41 42struct mqueue { 43 struct mbuf *top; 44 struct mbuf *last; 45 size_t len; 46}; 47 48#define MBUF_CTOP(bp) \ 49 ((bp) ? (u_char *)((bp)+1) + (bp)->m_offset : (u_char *)bp) 50 51#define CONST_MBUF_CTOP(bp) \ 52 ((bp) ? (const u_char *)((bp)+1) + (bp)->m_offset : (const u_char *)bp) 53 54#define MB_IPIN 0 55#define MB_IPOUT 1 56#define MB_IPV6IN 2 57#define MB_IPV6OUT 3 58#define MB_NATIN 4 59#define MB_NATOUT 5 60#define MB_MPIN 6 61#define MB_MPOUT 7 62#define MB_VJIN 8 63#define MB_VJOUT 9 64#define MB_ICOMPDIN 10 65#define MB_ICOMPDOUT 11 66#define MB_COMPDIN 12 67#define MB_COMPDOUT 13 68#define MB_LQRIN 14 69#define MB_LQROUT 15 70#define MB_ECHOIN 16 71#define MB_ECHOOUT 17 72#define MB_PROTOIN 18 73#define MB_PROTOOUT 19 74#define MB_ACFIN 20 75#define MB_ACFOUT 21 76#define MB_SYNCIN 22 77#define MB_SYNCOUT 23 78#define MB_HDLCIN 24 79#define MB_HDLCOUT 25 80#define MB_ASYNCIN 26 81#define MB_ASYNCOUT 27 82#define MB_CBCPIN 28 83#define MB_CBCPOUT 29 84#define MB_CHAPIN 30 85#define MB_CHAPOUT 31 86#define MB_PAPIN 32 87#define MB_PAPOUT 33 88#define MB_CCPIN 34 89#define MB_CCPOUT 35 90#define MB_IPCPIN 36 91#define MB_IPCPOUT 37 92#define MB_IPV6CPIN 38 93#define MB_IPV6CPOUT 39 94#define MB_LCPIN 40 95#define MB_LCPOUT 41 96#define MB_UNKNOWN 42 97#define MB_MAX MB_UNKNOWN 98 99#define M_MAXLEN (4352 - sizeof(struct mbuf)) /* > HDLCSIZE */ 100 101struct cmdargs; 102 103extern size_t m_length(struct mbuf *); 104extern struct mbuf *m_get(size_t, int); 105extern struct mbuf *m_free(struct mbuf *); 106extern void m_freem(struct mbuf *); 107extern void mbuf_Write(struct mbuf *, const void *, size_t); 108extern struct mbuf *mbuf_Read(struct mbuf *, void *, size_t); 109extern size_t mbuf_View(struct mbuf *, void *, size_t); 110extern struct mbuf *m_prepend(struct mbuf *, const void *, size_t, u_short); 111extern struct mbuf *m_adj(struct mbuf *, ssize_t); 112extern struct mbuf *m_pullup(struct mbuf *); 113extern void m_settype(struct mbuf *, int); 114extern struct mbuf *m_append(struct mbuf *, const void *, size_t); 115 116extern int mbuf_Show(struct cmdargs const *); 117 118extern void m_enqueue(struct mqueue *, struct mbuf *); 119extern struct mbuf *m_dequeue(struct mqueue *); 120