fsm.h revision 6736 
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: fsm.h,v 1.2 1995/02/26 12:17:28 amurai Exp $
19 *
20 *	TODO:
21 */
22
23#ifndef _FSM_H_
24#define	_FSM_H_
25
26#include "defs.h"
27#include <netinet/in.h>
28#include "timeout.h"
29#include <sys/cdefs.h>
30
31/*
32 *  State of machine
33 */
34#define	ST_INITIAL	0
35#define	ST_STARTING	1
36#define	ST_CLOSED	2
37#define	ST_STOPPED	3
38#define	ST_CLOSING	4
39#define	ST_STOPPING	5
40#define	ST_REQSENT	6
41#define	ST_ACKRCVD	7
42#define	ST_ACKSENT	8
43#define	ST_OPENED	9
44
45#define	ST_MAX		10
46#define	ST_UNDEF	-1
47
48#define	MODE_REQ	0
49#define	MODE_NAK	1
50#define	MODE_REJ	2
51#define	MODE_NOP	3
52
53#define	OPEN_ACTIVE	0
54#define	OPEN_PASSIVE	1
55
56struct fsm {
57  char	  *name;		/* Name of protocol */
58  u_short proto;		/* Protocol number */
59  u_short max_code;
60  int	  open_mode;
61  int	  state;		/* State of the machine */
62  int	  reqid;		/* Next request id */
63  int	  restart;		/* Restart counter value */
64  int	  maxconfig;
65
66  int     reqcode;		/* Request code sent */
67  struct pppTimer FsmTimer;	/* Restart Timer */
68
69  void	  (*LayerUp) __P((struct fsm *));
70  void	  (*LayerDown) __P((struct fsm *));
71  void	  (*LayerStart) __P((struct fsm *));
72  void	  (*LayerFinish) __P((struct fsm *));
73  void	  (*InitRestartCounter) __P((struct fsm *));
74  void	  (*SendConfigReq) __P((struct fsm *));
75  void	  (*SendTerminateReq) __P((struct fsm *));
76  void	  (*SendTerminateAck) __P((struct fsm *));
77  void	  (*DecodeConfig) __P((u_char *, int, int));
78};
79
80struct fsmheader {
81  u_char  code;		/* Request code */
82  u_char  id;		/* Identification */
83  u_short length;	/* Length of packet */
84};
85
86#define	CODE_CONFIGREQ	1
87#define	CODE_CONFIGACK	2
88#define	CODE_CONFIGNAK	3
89#define	CODE_CONFIGREJ	4
90#define	CODE_TERMREQ	5
91#define	CODE_TERMACK	6
92#define	CODE_CODEREJ	7
93#define	CODE_PROTOREJ	8
94#define	CODE_ECHOREQ	9		/* Used in LCP */
95#define	CODE_ECHOREP	10		/* Used in LCP */
96#define	CODE_DISCREQ	11
97#define	CODE_IDENT	12		/* Used in LCP Extension */
98#define	CODE_TIMEREM	13		/* Used in LCP Extension */
99#define	CODE_RESETREQ	14		/* Used in CCP */
100#define	CODE_RESETACK	15		/* Used in CCP */
101
102struct fsmcodedesc {
103  void (*action) __P((struct fsm *, struct fsmheader *, struct mbuf *));
104  char *name;
105};
106
107struct fsmconfig {
108  u_char type;
109  u_char length;
110};
111
112u_char AckBuff[200];
113u_char NakBuff[200];
114u_char RejBuff[100];
115u_char ReqBuff[200];
116
117u_char *ackp, *nakp, *rejp;
118
119extern char *StateNames[];
120extern void FsmInit __P((struct fsm *));
121extern void NewState __P((struct fsm *, int));
122extern void FsmOutput __P((struct fsm *, u_int, u_int, u_char *, int));
123extern void FsmOpen __P((struct fsm *));
124extern void FsmUp __P((struct fsm *));
125extern void FsmDown __P((struct fsm *));
126extern void FsmInput __P((struct fsm *, struct mbuf *));
127
128extern void FsmRecvConfigReq __P((struct fsm *, struct fsmheader *, struct mbuf *));
129extern void FsmRecvConfigAck __P((struct fsm *, struct fsmheader *, struct mbuf *));
130extern void FsmRecvConfigNak __P((struct fsm *, struct fsmheader *, struct mbuf *));
131extern void FsmRecvTermReq __P((struct fsm *, struct fsmheader *, struct mbuf *));
132extern void FsmRecvTermAck __P((struct fsm *, struct fsmheader *, struct mbuf *));
133extern void FsmClose __P((struct fsm *fp));
134
135extern struct fsm LcpFsm, IpcpFsm, CcpFsm;
136
137#endif	/* _FSM_H_ */
138