fsm.h
资源名称:ixp425BSP.rar [点击查看]
上传用户:luoyougen
上传日期:2008-05-12
资源大小:23136k
文件大小:5k
源码类别:
VxWorks
开发平台:
C/C++
- /* fsm.h - {Link, IP} Control Protocol Finite State Machine header */
- /* Copyright 1995 Wind River Systems, Inc. */
- /*
- * Copyright (c) 1989 Carnegie Mellon University.
- * All rights reserved.
- *
- * 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 Carnegie Mellon University. The name of the
- * University 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.
- */
- /*
- modification history
- --------------------
- 01a,16jan95,dzb WRS-ize.
- */
- #ifndef __INCfsmh
- #define __INCfsmh
- #ifdef __cplusplus
- extern "C" {
- #endif
- /*
- * Packet header = Code, id, length.
- */
- #define HEADERLEN (sizeof (u_char) + sizeof (u_char) + sizeof (u_short))
- /*
- * CP (LCP, IPCP, etc.) codes.
- */
- #define CONFREQ 1 /* Configuration Request */
- #define CONFACK 2 /* Configuration Ack */
- #define CONFNAK 3 /* Configuration Nak */
- #define CONFREJ 4 /* Configuration Reject */
- #define TERMREQ 5 /* Termination Request */
- #define TERMACK 6 /* Termination Ack */
- #define CODEREJ 7 /* Code Reject */
- /*
- * Each FSM is described by a fsm_callbacks and a fsm structure.
- */
- typedef struct fsm_callbacks {
- void (*resetci)(); /* Reset our Configuration Information */
- int (*cilen)(); /* Length of our Configuration Information */
- void (*addci)(); /* Add our Configuration Information */
- int (*ackci)(); /* ACK our Configuration Information */
- int (*nakci)(); /* NAK our Configuration Information */
- int (*rejci)(); /* Reject our Configuration Information */
- int (*reqci)(); /* Request peer's Configuration Information */
- void (*up)(); /* Called when fsm reaches OPENED state */
- void (*down)(); /* Called when fsm leaves OPENED state */
- void (*starting)(); /* Called when we want the lower layer */
- void (*finished)(); /* Called when we don't want the lower layer */
- void (*protreject)(); /* Called when Protocol-Reject received */
- void (*retransmit)(); /* Retransmission is necessary */
- int (*extcode)(); /* Called when unknown code received */
- char *proto_name; /* String name for protocol (for messages) */
- } fsm_callbacks;
- typedef struct fsm {
- int unit; /* Interface unit number */
- int protocol; /* Data Link Layer Protocol field value */
- int state; /* State */
- int flags; /* Contains option bits */
- u_char id; /* Current id */
- u_char reqid; /* Current request id */
- int timeouttime; /* Timeout time in milliseconds */
- int maxconfreqtransmits; /* Maximum Configure-Request transmissions */
- int retransmits; /* Number of retransmissions left */
- int maxtermtransmits; /* Maximum Terminate-Request transmissions */
- int nakloops; /* Number of nak loops since last ack */
- int maxnakloops; /* Maximum number of nak loops tolerated */
- fsm_callbacks *callbacks; /* Callback routines */
- } fsm;
- /*
- * Link states.
- */
- #define INITIAL 0 /* Down, hasn't been opened */
- #define STARTING 1 /* Down, been opened */
- #define CLOSED 2 /* Up, hasn't been opened */
- #define STOPPED 3 /* Open, waiting for down event */
- #define CLOSING 4 /* Terminating the connection, not open */
- #define STOPPING 5 /* Terminating, but open */
- #define REQSENT 6 /* We've sent a Config Request */
- #define ACKRCVD 7 /* We've received a Config Ack */
- #define ACKSENT 8 /* We've sent a Config Ack */
- #define OPENED 9 /* Connection available */
- /*
- * Flags - indicate options controlling FSM operation
- */
- #define OPT_PASSIVE 1 /* Don't die if we don't get a response */
- #define OPT_RESTART 2 /* Treat 2nd OPEN as DOWN, UP */
- #define OPT_SILENT 4 /* Wait for peer to speak first */
- /*
- * Timeouts.
- */
- #define DEFTIMEOUT 3 /* Timeout time in seconds */
- #define DEFMAXTERMREQS 2 /* Maximum Terminate-Request transmissions */
- #define DEFMAXCONFREQS 10 /* Maximum Configure-Request transmissions */
- #define DEFMAXNAKLOOPS 10 /* Maximum number of nak loops */
- /*
- * Prototypes
- */
- extern void fsm_init __ARGS((fsm *));
- extern void fsm_lowerup __ARGS((fsm *));
- extern void fsm_lowerdown __ARGS((fsm *));
- extern void fsm_open __ARGS((fsm *));
- extern void fsm_close __ARGS((fsm *));
- extern void fsm_input __ARGS((fsm *, u_char *, int));
- extern void fsm_protreject __ARGS((fsm *));
- extern void fsm_sdata __ARGS((fsm *, int, int, u_char *, int));
- #ifdef __cplusplus
- }
- #endif
- #endif /* __INCfsmh */