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/*
* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
*
* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the Internet Initiative Japan. The name of the
* IIJ may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* $FreeBSD$
*
* TODO:
*/
struct mbuf {
size_t m_size; /* size allocated (excluding header) */
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 */
/* 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 : NULL)
#define CONST_MBUF_CTOP(bp) \
((bp) ? (const u_char *)((bp)+1) + (bp)->m_offset : NULL)
#define MB_IPIN 0
#define MB_IPOUT 1
#define MB_NATIN 2
#define MB_NATOUT 3
#define MB_MPIN 4
#define MB_MPOUT 5
#define MB_VJIN 6
#define MB_VJOUT 7
#define MB_ICOMPDIN 8
#define MB_ICOMPDOUT 9
#define MB_COMPDIN 10
#define MB_COMPDOUT 11
#define MB_LQRIN 12
#define MB_LQROUT 13
#define MB_ECHOIN 14
#define MB_ECHOOUT 15
#define MB_PROTOIN 16
#define MB_PROTOOUT 17
#define MB_ACFIN 18
#define MB_ACFOUT 19
#define MB_SYNCIN 20
#define MB_SYNCOUT 21
#define MB_HDLCIN 22
#define MB_HDLCOUT 23
#define MB_ASYNCIN 24
#define MB_ASYNCOUT 25
#define MB_CBCPIN 26
#define MB_CBCPOUT 27
#define MB_CHAPIN 28
#define MB_CHAPOUT 29
#define MB_PAPIN 30
#define MB_PAPOUT 31
#define MB_CCPIN 32
#define MB_CCPOUT 33
#define MB_IPCPIN 34
#define MB_IPCPOUT 35
#define MB_LCPIN 36
#define MB_LCPOUT 37
#define MB_UNKNOWN 38
#define MB_MAX MB_UNKNOWN
#define M_MAXLEN (4096 - sizeof(struct mbuf))
struct cmdargs;
extern int 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, size_t);
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 *);
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