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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.
*
* $Id:$
*
* TODO:
*/
#ifndef _MBUF_H_
#define _MBUF_H_
struct mbuf {
u_char *base; /* pointer to top of buffer space */
short size; /* size allocated from base */
short offset; /* offset to start position */
short cnt; /* available byte count in buffer */
short type;
struct mbuf *next; /* link to next mbuf */
struct mbuf *pnext; /* link to next packet */
};
struct mqueue {
struct mbuf *top;
struct mbuf *last;
int qlen;
};
#define NULLBUFF ((struct mbuf *)0)
#define MBUF_CTOP(bp) (bp->base + bp->offset)
#define MB_ASYNC 1
#define MB_FSM 2
#define MB_HDLCOUT 3
#define MB_IPIN 4
#define MB_ECHO 5
#define MB_LQR 6
#define MB_MODEM 7
#define MB_VJCOMP 8
#define MB_LOG 9
#define MB_IPQ 10
#define MB_MAX MB_IPQ
extern int plength __P((struct mbuf *bp));
extern struct mbuf *mballoc __P((int cnt, int type));
extern struct mbuf *mbfree __P((struct mbuf *bp));
extern void pfree __P((struct mbuf *bp));
extern void mbwrite __P((struct mbuf *bp, u_char *ptr, int cnt));
extern struct mbuf *mbread __P((struct mbuf *bp, u_char *ptr, int cnt));
extern void DumpBp __P((struct mbuf *bp));
extern void Enqueue __P((struct mqueue *queue, struct mbuf *bp));
extern struct mbuf *Dequeue __P((struct mqueue *queue));
#endif
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