3377c28cd9
header in fsm_Input() we often end up with a NULL mbuf. Deal with a possible NULL mbuf being passed into mbuf_Prepend(). Adjust some spacing to make things more consistent.
73 lines
2.4 KiB
C
73 lines
2.4 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: mbuf.h,v 1.16 1999/05/08 11:07:09 brian Exp $
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*
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* TODO:
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*/
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struct mbuf {
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short size; /* size allocated (excluding header) */
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short offset; /* offset from header end to start position */
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short cnt; /* available byte count in buffer */
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short type; /* MB_* below */
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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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/* buffer space is malloc()d directly after the header */
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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 MBUF_CTOP(bp) \
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((bp) ? (u_char *)((bp)+1) + (bp)->offset : NULL)
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#define CONST_MBUF_CTOP(bp) \
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((bp) ? (const u_char *)((bp)+1) + (bp)->offset : NULL)
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#define MB_ASYNC 1
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#define MB_FSM 2
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#define MB_CBCP 3
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#define MB_HDLCOUT 4
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#define MB_IPIN 5
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#define MB_ECHO 6
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#define MB_LQR 7
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#define MB_VJCOMP 8
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#define MB_IPQ 9
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#define MB_MP 10
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#define MB_MAX MB_MP
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struct cmdargs;
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extern int mbuf_Length(struct mbuf *);
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extern struct mbuf *mbuf_Alloc(int, int);
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extern struct mbuf *mbuf_FreeSeg(struct mbuf *);
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extern void mbuf_Free(struct mbuf *);
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extern void mbuf_Write(struct mbuf *, const void *, size_t);
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extern struct mbuf *mbuf_Read(struct mbuf *, void *, size_t);
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extern size_t mbuf_View(struct mbuf *, void *, size_t);
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extern struct mbuf *mbuf_Prepend(struct mbuf *, const void *, size_t, size_t);
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extern struct mbuf *mbuf_Truncate(struct mbuf *, size_t);
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extern void mbuf_Log(void);
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extern int mbuf_Show(struct cmdargs const *);
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extern void mbuf_Enqueue(struct mqueue *, struct mbuf *);
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extern struct mbuf *mbuf_Dequeue(struct mqueue *);
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extern struct mbuf *mbuf_Contiguous(struct mbuf *);
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