fsm.h revision 6060 
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 * $Id:$
19 *
20 *	TODO:
21 */
22#ifndef _FSM_H_
23#define	_FSM_H_
24
25#include "defs.h"
26#include <netinet/in.h>
27#include "timeout.h"
28
29/*
30 *  State of machine
31 */
32#define	ST_INITIAL	0
33#define	ST_STARTING	1
34#define	ST_CLOSED	2
35#define	ST_STOPPED	3
36#define	ST_CLOSING	4
37#define	ST_STOPPING	5
38#define	ST_REQSENT	6
39#define	ST_ACKRCVD	7
40#define	ST_ACKSENT	8
41#define	ST_OPENED	9
42
43#define	ST_MAX		10
44#define	ST_UNDEF	-1
45
46#define	MODE_REQ	0
47#define	MODE_NAK	1
48#define	MODE_REJ	2
49
50#define	OPEN_ACTIVE	0
51#define	OPEN_PASSIVE	1
52
53struct fsm {
54  char	  *name;		/* Name of protocol */
55  u_short proto;		/* Protocol number */
56  u_short max_code;
57  int	  open_mode;
58  int	  state;		/* State of the machine */
59  int	  reqid;		/* Next request id */
60  int	  restart;		/* Restart counter value */
61  int	  maxconfig;
62
63  int     reqcode;		/* Request code sent */
64  struct pppTimer FsmTimer;	/* Restart Timer */
65
66  void	  (*LayerUp)();
67  void	  (*LayerDown)();
68  void	  (*LayerStart)();
69  void	  (*LayerFinish)();
70  void	  (*InitRestartCounter)();
71  void	  (*SendConfigReq)();
72  void	  (*SendTerminateReq)();
73  void	  (*SendTerminateAck)();
74  void	  (*DecodeConfig)();
75};
76
77struct fsmheader {
78  u_char  code;		/* Request code */
79  u_char  id;		/* Identification */
80  u_short length;	/* Length of packet */
81};
82
83#define	CODE_CONFIGREQ	1
84#define	CODE_CONFIGACK	2
85#define	CODE_CONFIGNAK	3
86#define	CODE_CONFIGREJ	4
87#define	CODE_TERMREQ	5
88#define	CODE_TERMACK	6
89#define	CODE_CODEREJ	7
90#define	CODE_PROTOREJ	8
91#define	CODE_ECHOREQ	9		/* Used in LCP */
92#define	CODE_ECHOREP	10		/* Used in LCP */
93#define	CODE_DISCREQ	11
94#define	CODE_IDENT	12		/* Used in LCP Extension */
95#define	CODE_TIMEREM	13		/* Used in LCP Extension */
96#define	CODE_RESETREQ	14		/* Used in CCP */
97#define	CODE_RESETACK	15		/* Used in CCP */
98
99struct fsmcodedesc {
100  void (*action)();
101  char *name;
102};
103
104struct fsmconfig {
105  u_char type;
106  u_char length;
107};
108
109u_char AckBuff[200];
110u_char NakBuff[200];
111u_char RejBuff[100];
112u_char ReqBuff[200];
113
114u_char *ackp, *nakp, *rejp;
115
116extern char *StateNames[];
117extern void FsmInit(struct fsm *);
118extern void NewState(struct fsm *, int);
119extern void FsmOutput(struct fsm *, u_int, u_int, u_char *, int);
120extern void FsmOpen(struct fsm *);
121extern void FsmUp(struct fsm *);
122extern void FsmDown(struct fsm *);
123extern void FsmInput(struct fsm *, struct mbuf *);
124
125extern void FsmRecvConfigReq(struct fsm *, struct fsmheader *, struct mbuf *);
126extern void FsmRecvConfigAck(struct fsm *, struct fsmheader *, struct mbuf *);
127extern void FsmRecvConfigNak(struct fsm *, struct fsmheader *, struct mbuf *);
128extern void FsmRecvTermReq(struct fsm *, struct fsmheader *, struct mbuf *);
129extern void FsmRecvTermAck(struct fsm *, struct fsmheader *, struct mbuf *);
130extern void FsmClose(struct fsm *fp);
131
132extern struct fsm LcpFsm, IpcpFsm, CcpFsm;
133
134#endif	/* _FSM_H_ */
135