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 1.9 1997/08/20 23:47:43 brian 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 30 /* 31 * State of machine 32 */ 33 #define ST_INITIAL 0 34 #define ST_STARTING 1 35 #define ST_CLOSED 2 36 #define ST_STOPPED 3 37 #define ST_CLOSING 4 38 #define ST_STOPPING 5 39 #define ST_REQSENT 6 40 #define ST_ACKRCVD 7 41 #define ST_ACKSENT 8 42 #define ST_OPENED 9 43 44 #define ST_MAX 10 45 #define ST_UNDEF -1 46 47 #define MODE_REQ 0 48 #define MODE_NAK 1 49 #define MODE_REJ 2 50 #define MODE_NOP 3 51 52 #define OPEN_ACTIVE 0 53 #define OPEN_PASSIVE 1 54 55 struct fsm { 56 char *name; /* Name of protocol */ 57 u_short proto; /* Protocol number */ 58 u_short max_code; 59 int open_mode; 60 int state; /* State of the machine */ 61 int reqid; /* Next request id */ 62 int restart; /* Restart counter value */ 63 int maxconfig; 64 65 int reqcode; /* Request code sent */ 66 struct pppTimer FsmTimer; /* Restart Timer */ 67 68 /* 69 * This timer times the ST_STOPPED state out after the given value 70 * (specified via "set stopped ..."). Although this isn't specified in the 71 * rfc, the rfc *does* say that "the application may use higher level 72 * timers to avoid deadlock". The StoppedTimer takes effect when the other 73 * side ABENDs rather than going into ST_ACKSENT (and sending the ACK), 74 * causing ppp to time out and drop into ST_STOPPED. At this point, 75 * nothing will change this state :-( 76 */ 77 struct pppTimer StoppedTimer; 78 int LogLevel; 79 80 void (*LayerUp) (struct fsm *); 81 void (*LayerDown) (struct fsm *); 82 void (*LayerStart) (struct fsm *); 83 void (*LayerFinish) (struct fsm *); 84 void (*InitRestartCounter) (struct fsm *); 85 void (*SendConfigReq) (struct fsm *); 86 void (*SendTerminateReq) (struct fsm *); 87 void (*SendTerminateAck) (struct fsm *); 88 void (*DecodeConfig) (u_char *, int, int); 89 }; 90 91 struct fsmheader { 92 u_char code; /* Request code */ 93 u_char id; /* Identification */ 94 u_short length; /* Length of packet */ 95 }; 96 97 #define CODE_CONFIGREQ 1 98 #define CODE_CONFIGACK 2 99 #define CODE_CONFIGNAK 3 100 #define CODE_CONFIGREJ 4 101 #define CODE_TERMREQ 5 102 #define CODE_TERMACK 6 103 #define CODE_CODEREJ 7 104 #define CODE_PROTOREJ 8 105 #define CODE_ECHOREQ 9 /* Used in LCP */ 106 #define CODE_ECHOREP 10 /* Used in LCP */ 107 #define CODE_DISCREQ 11 108 #define CODE_IDENT 12 /* Used in LCP Extension */ 109 #define CODE_TIMEREM 13 /* Used in LCP Extension */ 110 #define CODE_RESETREQ 14 /* Used in CCP */ 111 #define CODE_RESETACK 15 /* Used in CCP */ 112 113 struct fsmcodedesc { 114 void (*action) (struct fsm *, struct fsmheader *, struct mbuf *); 115 char *name; 116 }; 117 118 struct fsmconfig { 119 u_char type; 120 u_char length; 121 }; 122 123 u_char AckBuff[200]; 124 u_char NakBuff[200]; 125 u_char RejBuff[100]; 126 u_char ReqBuff[200]; 127 128 u_char *ackp, *nakp, *rejp; 129 130 extern char const *StateNames[]; 131 extern void FsmInit(struct fsm *); 132 extern void NewState(struct fsm *, int); 133 extern void FsmOutput(struct fsm *, u_int, u_int, u_char *, int); 134 extern void FsmOpen(struct fsm *); 135 extern void FsmUp(struct fsm *); 136 extern void FsmDown(struct fsm *); 137 extern void FsmInput(struct fsm *, struct mbuf *); 138 139 extern void FsmRecvConfigReq(struct fsm *, struct fsmheader *, struct mbuf *); 140 extern void FsmRecvConfigAck(struct fsm *, struct fsmheader *, struct mbuf *); 141 extern void FsmRecvConfigNak(struct fsm *, struct fsmheader *, struct mbuf *); 142 extern void FsmRecvTermReq(struct fsm *, struct fsmheader *, struct mbuf *); 143 extern void FsmRecvTermAck(struct fsm *, struct fsmheader *, struct mbuf *); 144 extern void FsmClose(struct fsm * fp); 145 146 extern struct fsm LcpFsm, IpcpFsm, CcpFsm; 147 148 #endif /* _FSM_H_ */ 149