188 lines
7.5 KiB
C
188 lines
7.5 KiB
C
|
/*****************************************************************************
|
||
|
|
* fsm.h - Network Control Protocol Finite State Machine header file.
|
||
|
|
*
|
||
|
|
* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
|
||
|
|
* Copyright (c) 1997 Global Election Systems Inc.
|
||
|
|
*
|
||
|
|
* The authors hereby grant permission to use, copy, modify, distribute,
|
||
|
|
* and license this software and its documentation for any purpose, provided
|
||
|
|
* that existing copyright notices are retained in all copies and that this
|
||
|
|
* notice and the following disclaimer are included verbatim in any
|
||
|
|
* distributions. No written agreement, license, or royalty fee is required
|
||
|
|
* for any of the authorized uses.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
|
||
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||
|
|
* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
******************************************************************************
|
||
|
|
* REVISION HISTORY
|
||
|
|
*
|
||
|
|
* 03-01-01 Marc Boucher <marc@mbsi.ca>
|
||
|
|
* Ported to lwIP.
|
||
|
|
* 97-11-05 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
|
||
|
|
* Original based on BSD code.
|
||
|
|
*****************************************************************************/
|
||
|
|
/*
|
||
|
|
* fsm.h - {Link, IP} Control Protocol Finite State Machine definitions.
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
* $Id: fsm.h,v 1.1 2003/05/27 14:37:56 jani Exp $
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef FSM_H
|
||
|
|
#define FSM_H
|
||
|
|
|
||
|
|
|
||
|
|
/*****************************************************************************
|
||
|
|
************************* PUBLIC DEFINITIONS *********************************
|
||
|
|
*****************************************************************************/
|
||
|
|
/*
|
||
|
|
* LCP 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 */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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 */
|
||
|
|
|
||
|
|
|
||
|
|
/*****************************************************************************
|
||
|
|
************************* PUBLIC DATA TYPES **********************************
|
||
|
|
*****************************************************************************/
|
||
|
|
/*
|
||
|
|
* Each FSM is described by an fsm structure and fsm callbacks.
|
||
|
|
*/
|
||
|
|
typedef struct fsm {
|
||
|
|
int unit; /* Interface unit number */
|
||
|
|
u_short 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 */
|
||
|
|
u_char seen_ack; /* Have received valid Ack/Nak/Rej to Req */
|
||
|
|
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 */
|
||
|
|
struct fsm_callbacks* callbacks;/* Callback routines */
|
||
|
|
char* term_reason; /* Reason for closing protocol */
|
||
|
|
int term_reason_len; /* Length of term_reason */
|
||
|
|
} fsm;
|
||
|
|
|
||
|
|
|
||
|
|
typedef struct fsm_callbacks {
|
||
|
|
void (*resetci) /* Reset our Configuration Information */
|
||
|
|
(fsm*);
|
||
|
|
int (*cilen) /* Length of our Configuration Information */
|
||
|
|
(fsm*);
|
||
|
|
void (*addci) /* Add our Configuration Information */
|
||
|
|
(fsm*, u_char*, int*);
|
||
|
|
int (*ackci) /* ACK our Configuration Information */
|
||
|
|
(fsm*, u_char*, int);
|
||
|
|
int (*nakci) /* NAK our Configuration Information */
|
||
|
|
(fsm*, u_char*, int);
|
||
|
|
int (*rejci) /* Reject our Configuration Information */
|
||
|
|
(fsm*, u_char*, int);
|
||
|
|
int (*reqci) /* Request peer's Configuration Information */
|
||
|
|
(fsm*, u_char*, int*, int);
|
||
|
|
void (*up) /* Called when fsm reaches OPENED state */
|
||
|
|
(fsm*);
|
||
|
|
void (*down) /* Called when fsm leaves OPENED state */
|
||
|
|
(fsm*);
|
||
|
|
void (*starting) /* Called when we want the lower layer */
|
||
|
|
(fsm*);
|
||
|
|
void (*finished) /* Called when we don't want the lower layer */
|
||
|
|
(fsm*);
|
||
|
|
void (*protreject) /* Called when Protocol-Reject received */
|
||
|
|
(int);
|
||
|
|
void (*retransmit) /* Retransmission is necessary */
|
||
|
|
(fsm*);
|
||
|
|
int (*extcode) /* Called when unknown code received */
|
||
|
|
(fsm*, int, u_char, u_char*, int);
|
||
|
|
char *proto_name; /* String name for protocol (for messages) */
|
||
|
|
} fsm_callbacks;
|
||
|
|
|
||
|
|
|
||
|
|
/*****************************************************************************
|
||
|
|
*********************** PUBLIC DATA STRUCTURES *******************************
|
||
|
|
*****************************************************************************/
|
||
|
|
/*
|
||
|
|
* Variables
|
||
|
|
*/
|
||
|
|
extern int peer_mru[]; /* currently negotiated peer MRU (per unit) */
|
||
|
|
|
||
|
|
|
||
|
|
/*****************************************************************************
|
||
|
|
************************** PUBLIC FUNCTIONS **********************************
|
||
|
|
*****************************************************************************/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Prototypes
|
||
|
|
*/
|
||
|
|
void fsm_init (fsm*);
|
||
|
|
void fsm_lowerup (fsm*);
|
||
|
|
void fsm_lowerdown (fsm*);
|
||
|
|
void fsm_open (fsm*);
|
||
|
|
void fsm_close (fsm*, char*);
|
||
|
|
void fsm_input (fsm*, u_char*, int);
|
||
|
|
void fsm_protreject (fsm*);
|
||
|
|
void fsm_sdata (fsm*, u_char, u_char, u_char*, int);
|
||
|
|
|
||
|
|
|
||
|
|
#endif /* FSM_H */
|
||
|
|
|