/*- * Copyright (c) 1996 - 2001 Brian Somers * based on work by Toshiharu OHNO * Internet Initiative Japan, Inc (IIJ) * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD: src/usr.sbin/ppp/mbuf.h,v 1.29.26.1 2010/12/21 17:10:29 kensmith Exp $ */ struct mbuf { size_t m_size; /* size allocated (excluding header) */ u_short m_offset; /* offset from header end to start position */ size_t m_len; /* available byte count in buffer */ short m_type; /* MB_* below */ struct mbuf *m_next; /* link to next mbuf */ struct mbuf *m_nextpkt; /* link to next packet */ unsigned long priv; /* private data - holds HDLC escape count */ /* buffer space is malloc()d directly after the header */ }; struct mqueue { struct mbuf *top; struct mbuf *last; size_t len; }; #define MBUF_CTOP(bp) \ ((bp) ? (u_char *)((bp)+1) + (bp)->m_offset : (u_char *)bp) #define CONST_MBUF_CTOP(bp) \ ((bp) ? (const u_char *)((bp)+1) + (bp)->m_offset : (const u_char *)bp) #define MB_IPIN 0 #define MB_IPOUT 1 #define MB_IPV6IN 2 #define MB_IPV6OUT 3 #define MB_NATIN 4 #define MB_NATOUT 5 #define MB_MPIN 6 #define MB_MPOUT 7 #define MB_VJIN 8 #define MB_VJOUT 9 #define MB_ICOMPDIN 10 #define MB_ICOMPDOUT 11 #define MB_COMPDIN 12 #define MB_COMPDOUT 13 #define MB_LQRIN 14 #define MB_LQROUT 15 #define MB_ECHOIN 16 #define MB_ECHOOUT 17 #define MB_PROTOIN 18 #define MB_PROTOOUT 19 #define MB_ACFIN 20 #define MB_ACFOUT 21 #define MB_SYNCIN 22 #define MB_SYNCOUT 23 #define MB_HDLCIN 24 #define MB_HDLCOUT 25 #define MB_ASYNCIN 26 #define MB_ASYNCOUT 27 #define MB_CBCPIN 28 #define MB_CBCPOUT 29 #define MB_CHAPIN 30 #define MB_CHAPOUT 31 #define MB_PAPIN 32 #define MB_PAPOUT 33 #define MB_CCPIN 34 #define MB_CCPOUT 35 #define MB_IPCPIN 36 #define MB_IPCPOUT 37 #define MB_IPV6CPIN 38 #define MB_IPV6CPOUT 39 #define MB_LCPIN 40 #define MB_LCPOUT 41 #define MB_UNKNOWN 42 #define MB_MAX MB_UNKNOWN #define M_MAXLEN (4352 - sizeof(struct mbuf)) /* > HDLCSIZE */ struct cmdargs; extern size_t m_length(struct mbuf *); extern struct mbuf *m_get(size_t, int); extern struct mbuf *m_free(struct mbuf *); extern void m_freem(struct mbuf *); extern void mbuf_Write(struct mbuf *, const void *, size_t); extern struct mbuf *mbuf_Read(struct mbuf *, void *, size_t); extern size_t mbuf_View(struct mbuf *, void *, size_t); extern struct mbuf *m_prepend(struct mbuf *, const void *, size_t, u_short); extern struct mbuf *m_adj(struct mbuf *, ssize_t); extern struct mbuf *m_pullup(struct mbuf *); extern void m_settype(struct mbuf *, int); extern struct mbuf *m_append(struct mbuf *, const void *, size_t); extern int mbuf_Show(struct cmdargs const *); extern void m_enqueue(struct mqueue *, struct mbuf *); extern struct mbuf *m_dequeue(struct mqueue *);