1 /* 2 * Written by Toshiharu OHNO (tony-o@iij.ad.jp) 3 * 4 * Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd. 5 * 6 * Redistribution and use in source and binary forms are permitted 7 * provided that the above copyright notice and this paragraph are 8 * duplicated in all such forms and that any documentation, 9 * advertising materials, and other materials related to such 10 * distribution and use acknowledge that the software was developed 11 * by the Internet Initiative Japan. The name of the 12 * IIJ may not be used to endorse or promote products derived 13 * from this software without specific prior written permission. 14 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 16 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 17 * 18 * $Id: mbuf.h,v 1.13 1998/08/07 18:42:50 brian Exp $ 19 * 20 * TODO: 21 */ 22 23 struct mbuf { 24 short size; /* size allocated (excluding header) */ 25 short offset; /* offset from header end to start position */ 26 short cnt; /* available byte count in buffer */ 27 short type; /* MB_* below */ 28 struct mbuf *next; /* link to next mbuf */ 29 struct mbuf *pnext; /* link to next packet */ 30 /* buffer space is malloc()d directly after the header */ 31 }; 32 33 struct mqueue { 34 struct mbuf *top; 35 struct mbuf *last; 36 int qlen; 37 }; 38 39 #define MBUF_CTOP(bp) ((u_char *)((bp)+1) + (bp)->offset) 40 #define CONST_MBUF_CTOP(bp) ((const u_char *)((bp)+1) + (bp)->offset) 41 42 #define MB_ASYNC 1 43 #define MB_FSM 2 44 #define MB_CBCP 3 45 #define MB_HDLCOUT 4 46 #define MB_IPIN 5 47 #define MB_ECHO 6 48 #define MB_LQR 7 49 #define MB_LINK 8 50 #define MB_VJCOMP 9 51 #define MB_IPQ 10 52 #define MB_MP 11 53 #define MB_MAX MB_MP 54 55 struct cmdargs; 56 57 extern int mbuf_Length(struct mbuf *); 58 extern struct mbuf *mbuf_Alloc(int, int); 59 extern struct mbuf *mbuf_FreeSeg(struct mbuf *); 60 extern void mbuf_Free(struct mbuf *); 61 extern void mbuf_Write(struct mbuf *, u_char *, int); 62 extern struct mbuf *mbuf_Read(struct mbuf *, u_char *, int); 63 extern void mbuf_Log(void); 64 extern int mbuf_Show(struct cmdargs const *); 65 extern void mbuf_Enqueue(struct mqueue *, struct mbuf *); 66 extern struct mbuf *mbuf_Dequeue(struct mqueue *); 67