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/*
* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
*
* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the Internet Initiative Japan. The name of the
* IIJ may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* $Id: fsm.h,v 1.15 1998/01/20 22:47:37 brian Exp $
*
* TODO:
*/
/*
* State of machine
*/
#define ST_INITIAL 0
#define ST_STARTING 1
#define ST_CLOSED 2
#define ST_STOPPED 3
#define ST_CLOSING 4
#define ST_STOPPING 5
#define ST_REQSENT 6
#define ST_ACKRCVD 7
#define ST_ACKSENT 8
#define ST_OPENED 9
#define ST_MAX 10
#define ST_UNDEF -1
#define MODE_REQ 0
#define MODE_NAK 1
#define MODE_REJ 2
#define MODE_NOP 3
#define MODE_ACK 4 /* pseudo mode for ccp negotiations */
#define OPEN_PASSIVE -1
struct fsm {
const char *name; /* Name of protocol */
u_short proto; /* Protocol number */
u_short max_code;
int open_mode;
int state; /* State of the machine */
u_char reqid; /* Next request id */
int restart; /* Restart counter value */
int maxconfig;
struct pppTimer FsmTimer; /* Restart Timer */
struct pppTimer OpenTimer; /* Delay before opening */
/*
* This timer times the ST_STOPPED state out after the given value
* (specified via "set stopped ..."). Although this isn't specified in the
* rfc, the rfc *does* say that "the application may use higher level
* timers to avoid deadlock". The StoppedTimer takes effect when the other
* side ABENDs rather than going into ST_ACKSENT (and sending the ACK),
* causing ppp to time out and drop into ST_STOPPED. At this point,
* nothing will change this state :-(
*/
struct pppTimer StoppedTimer;
int LogLevel;
void (*LayerUp) (struct fsm *);
void (*LayerDown) (struct fsm *);
void (*LayerStart) (struct fsm *);
void (*LayerFinish) (struct fsm *);
void (*InitRestartCounter) (struct fsm *);
void (*SendConfigReq) (struct fsm *);
void (*SendTerminateReq) (struct fsm *);
void (*SendTerminateAck) (struct fsm *);
void (*DecodeConfig) (u_char *, int, int);
};
struct fsmheader {
u_char code; /* Request code */
u_char id; /* Identification */
u_short length; /* Length of packet */
};
#define CODE_CONFIGREQ 1
#define CODE_CONFIGACK 2
#define CODE_CONFIGNAK 3
#define CODE_CONFIGREJ 4
#define CODE_TERMREQ 5
#define CODE_TERMACK 6
#define CODE_CODEREJ 7
#define CODE_PROTOREJ 8
#define CODE_ECHOREQ 9 /* Used in LCP */
#define CODE_ECHOREP 10 /* Used in LCP */
#define CODE_DISCREQ 11
#define CODE_IDENT 12 /* Used in LCP Extension */
#define CODE_TIMEREM 13 /* Used in LCP Extension */
#define CODE_RESETREQ 14 /* Used in CCP */
#define CODE_RESETACK 15 /* Used in CCP */
struct fsmcodedesc {
void (*action) (struct fsm *, struct fsmheader *, struct mbuf *);
const char *name;
};
struct fsmconfig {
u_char type;
u_char length;
};
extern u_char AckBuff[200];
extern u_char NakBuff[200];
extern u_char RejBuff[100];
extern u_char ReqBuff[200];
extern u_char *ackp;
extern u_char *nakp;
extern u_char *rejp;
extern char const *StateNames[];
extern void FsmInit(struct fsm *);
extern void FsmOutput(struct fsm *, u_int, u_int, u_char *, int);
extern void FsmOpen(struct fsm *);
extern void FsmUp(struct fsm *);
extern void FsmDown(struct fsm *);
extern void FsmInput(struct fsm *, struct mbuf *);
extern void FsmClose(struct fsm *);
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