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 23 #ifndef _FSM_H_ 24 #define _FSM_H_ 25 26 #include "defs.h" 27 #include <netinet/in.h> 28 #include "timeout.h" 29 #include "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 56 struct 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 80 struct 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 */ 101 102 struct fsmcodedesc { 103 void (*action) __P((struct fsm *, struct fsmheader *, struct mbuf *)); 104 char *name; 105 }; 106 107 struct fsmconfig { 108 u_char type; 109 u_char length; 110 }; 111 112 u_char AckBuff[200]; 113 u_char NakBuff[200]; 114 u_char RejBuff[100]; 115 u_char ReqBuff[200]; 116 117 u_char *ackp, *nakp, *rejp; 118 119 extern char const *StateNames[]; 120 extern void FsmInit __P((struct fsm *)); 121 extern void NewState __P((struct fsm *, int)); 122 extern void FsmOutput __P((struct fsm *, u_int, u_int, u_char *, int)); 123 extern void FsmOpen __P((struct fsm *)); 124 extern void FsmUp __P((struct fsm *)); 125 extern void FsmDown __P((struct fsm *)); 126 extern void FsmInput __P((struct fsm *, struct mbuf *)); 127 128 extern void FsmRecvConfigReq __P((struct fsm *, struct fsmheader *, struct mbuf *)); 129 extern void FsmRecvConfigAck __P((struct fsm *, struct fsmheader *, struct mbuf *)); 130 extern void FsmRecvConfigNak __P((struct fsm *, struct fsmheader *, struct mbuf *)); 131 extern void FsmRecvTermReq __P((struct fsm *, struct fsmheader *, struct mbuf *)); 132 extern void FsmRecvTermAck __P((struct fsm *, struct fsmheader *, struct mbuf *)); 133 extern void FsmClose __P((struct fsm *fp)); 134 135 extern struct fsm LcpFsm, IpcpFsm, CcpFsm; 136 137 #endif /* _FSM_H_ */ 138