fsm.h revision 32381
1140609Sdas/* 2140609Sdas * Written by Toshiharu OHNO (tony-o@iij.ad.jp) 3140609Sdas * 4140609Sdas * Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd. 5140609Sdas * 6140609Sdas * Redistribution and use in source and binary forms are permitted 7140609Sdas * provided that the above copyright notice and this paragraph are 8140609Sdas * duplicated in all such forms and that any documentation, 9140609Sdas * advertising materials, and other materials related to such 10140609Sdas * distribution and use acknowledge that the software was developed 11140609Sdas * by the Internet Initiative Japan. The name of the 12140609Sdas * IIJ may not be used to endorse or promote products derived 13140609Sdas * from this software without specific prior written permission. 14140609Sdas * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 15140609Sdas * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 16140609Sdas * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 17140609Sdas * 18140609Sdas * $Id: fsm.h,v 1.13 1997/12/03 10:23:47 brian Exp $ 19140609Sdas * 20140609Sdas * TODO: 21140609Sdas */ 22140609Sdas 23140609Sdas/* 24140609Sdas * State of machine 25140609Sdas */ 26140609Sdas#define ST_INITIAL 0 27140609Sdas#define ST_STARTING 1 28140609Sdas#define ST_CLOSED 2 29140609Sdas#define ST_STOPPED 3 30140609Sdas#define ST_CLOSING 4 31140609Sdas#define ST_STOPPING 5 32143224Sdas#define ST_REQSENT 6 33143224Sdas#define ST_ACKRCVD 7 34140609Sdas#define ST_ACKSENT 8 35140609Sdas#define ST_OPENED 9 36140609Sdas 37140609Sdas#define ST_MAX 10 38140609Sdas#define ST_UNDEF -1 39140609Sdas 40140609Sdas#define MODE_REQ 0 41140609Sdas#define MODE_NAK 1 42140609Sdas#define MODE_REJ 2 43143224Sdas#define MODE_NOP 3 44143224Sdas#define MODE_ACK 4 /* pseudo mode for ccp negotiations */ 45140609Sdas 46140609Sdas#define OPEN_ACTIVE 0 47143224Sdas#define OPEN_PASSIVE 1 48143224Sdas 49140609Sdasstruct fsm { 50143224Sdas const char *name; /* Name of protocol */ 51140609Sdas u_short proto; /* Protocol number */ 52140609Sdas u_short max_code; 53140609Sdas int open_mode; 54140609Sdas int state; /* State of the machine */ 55140609Sdas u_char reqid; /* Next request id */ 56140609Sdas int restart; /* Restart counter value */ 57140609Sdas int maxconfig; 58140609Sdas 59140609Sdas int reqcode; /* Request code sent */ 60140609Sdas struct pppTimer FsmTimer; /* Restart Timer */ 61140609Sdas 62140609Sdas /* 63140609Sdas * This timer times the ST_STOPPED state out after the given value 64140609Sdas * (specified via "set stopped ..."). Although this isn't specified in the 65140609Sdas * rfc, the rfc *does* say that "the application may use higher level 66140609Sdas * timers to avoid deadlock". The StoppedTimer takes effect when the other 67140609Sdas * side ABENDs rather than going into ST_ACKSENT (and sending the ACK), 68140609Sdas * causing ppp to time out and drop into ST_STOPPED. At this point, 69143224Sdas * nothing will change this state :-( 70143224Sdas */ 71140609Sdas struct pppTimer StoppedTimer; 72143224Sdas int LogLevel; 73140609Sdas 74140609Sdas void (*LayerUp) (struct fsm *); 75140609Sdas void (*LayerDown) (struct fsm *); 76143224Sdas void (*LayerStart) (struct fsm *); 77143224Sdas void (*LayerFinish) (struct fsm *); 78140609Sdas void (*InitRestartCounter) (struct fsm *); 79143224Sdas void (*SendConfigReq) (struct fsm *); 80140609Sdas void (*SendTerminateReq) (struct fsm *); 81140609Sdas void (*SendTerminateAck) (struct fsm *); 82140609Sdas void (*DecodeConfig) (u_char *, int, int); 83143224Sdas}; 84140609Sdas 85140609Sdasstruct fsmheader { 86140609Sdas u_char code; /* Request code */ 87140609Sdas u_char id; /* Identification */ 88140609Sdas u_short length; /* Length of packet */ 89140609Sdas}; 90140609Sdas 91140609Sdas#define CODE_CONFIGREQ 1 92140609Sdas#define CODE_CONFIGACK 2 93140609Sdas#define CODE_CONFIGNAK 3 94140609Sdas#define CODE_CONFIGREJ 4 95140609Sdas#define CODE_TERMREQ 5 96140609Sdas#define CODE_TERMACK 6 97140609Sdas#define CODE_CODEREJ 7 98143224Sdas#define CODE_PROTOREJ 8 99143224Sdas#define CODE_ECHOREQ 9 /* Used in LCP */ 100140609Sdas#define CODE_ECHOREP 10 /* Used in LCP */ 101143224Sdas#define CODE_DISCREQ 11 102140609Sdas#define CODE_IDENT 12 /* Used in LCP Extension */ 103140609Sdas#define CODE_TIMEREM 13 /* Used in LCP Extension */ 104140609Sdas#define CODE_RESETREQ 14 /* Used in CCP */ 105140609Sdas#define CODE_RESETACK 15 /* Used in CCP */ 106140609Sdas 107143224Sdasstruct fsmcodedesc { 108143224Sdas void (*action) (struct fsm *, struct fsmheader *, struct mbuf *); 109143224Sdas const char *name; 110143224Sdas}; 111143224Sdas 112143224Sdasstruct fsmconfig { 113143224Sdas u_char type; 114143224Sdas u_char length; 115143224Sdas}; 116152755Sjoel 117extern u_char AckBuff[200]; 118extern u_char NakBuff[200]; 119extern u_char RejBuff[100]; 120extern u_char ReqBuff[200]; 121extern u_char *ackp; 122extern u_char *nakp; 123extern u_char *rejp; 124 125extern char const *StateNames[]; 126 127extern void FsmInit(struct fsm *); 128extern void FsmOutput(struct fsm *, u_int, u_int, u_char *, int); 129extern void FsmOpen(struct fsm *); 130extern void FsmUp(struct fsm *); 131extern void FsmDown(struct fsm *); 132extern void FsmInput(struct fsm *, struct mbuf *); 133extern void FsmClose(struct fsm *); 134