68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/*
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* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
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*
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* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the Internet Initiative Japan. The name of the
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* IIJ may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $Id:$
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*
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* TODO:
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*/
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#ifndef _MBUF_H_
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#define _MBUF_H_
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struct mbuf {
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u_char *base; /* pointer to top of buffer space */
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short size; /* size allocated from base */
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short offset; /* offset to start position */
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short cnt; /* available byte count in buffer */
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short type;
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struct mbuf *next; /* link to next mbuf */
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struct mbuf *pnext; /* link to next packet */
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};
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struct mqueue {
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struct mbuf *top;
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struct mbuf *last;
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int qlen;
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};
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#define NULLBUFF ((struct mbuf *)0)
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#define MBUF_CTOP(bp) (bp->base + bp->offset)
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#define MB_ASYNC 1
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#define MB_FSM 2
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#define MB_HDLCOUT 3
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#define MB_IPIN 4
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#define MB_ECHO 5
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#define MB_LQR 6
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#define MB_MODEM 7
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#define MB_VJCOMP 8
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#define MB_LOG 9
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#define MB_IPQ 10
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#define MB_MAX MB_IPQ
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extern int plength(struct mbuf *bp);
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extern struct mbuf *mballoc(int cnt, int type);
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extern struct mbuf *mbfree(struct mbuf *bp);
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extern void pfree(struct mbuf *bp);
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extern void mbwrite(struct mbuf *bp, u_char *ptr, int cnt);
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extern struct mbuf *mbread(struct mbuf *bp, u_char *ptr, int cnt);
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extern void DumpBp(struct mbuf *bp);
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extern void Enqueue(struct mqueue *queue, struct mbuf *bp);
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extern struct mbuf *Dequeue(struct mqueue *queue);
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#endif
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