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lwip/netif/ppp/fsm.h@0:3717b703f76d, 2010-05-24 (annotated)

Committer:: donatien
Date:: Mon May 24 10:23:42 2010 +0000
Revision:: 0:3717b703f76d

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User	Revision	Line number	New contents of line
donatien	0:3717b703f76d	1	/*****************************************************************************
donatien	0:3717b703f76d	2	* fsm.h - Network Control Protocol Finite State Machine header file.
donatien	0:3717b703f76d	3	*
donatien	0:3717b703f76d	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
donatien	0:3717b703f76d	5	* Copyright (c) 1997 Global Election Systems Inc.
donatien	0:3717b703f76d	6	*
donatien	0:3717b703f76d	7	* The authors hereby grant permission to use, copy, modify, distribute,
donatien	0:3717b703f76d	8	* and license this software and its documentation for any purpose, provided
donatien	0:3717b703f76d	9	* that existing copyright notices are retained in all copies and that this
donatien	0:3717b703f76d	10	* notice and the following disclaimer are included verbatim in any
donatien	0:3717b703f76d	11	* distributions. No written agreement, license, or royalty fee is required
donatien	0:3717b703f76d	12	* for any of the authorized uses.
donatien	0:3717b703f76d	13	*
donatien	0:3717b703f76d	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
donatien	0:3717b703f76d	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
donatien	0:3717b703f76d	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
donatien	0:3717b703f76d	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
donatien	0:3717b703f76d	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
donatien	0:3717b703f76d	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
donatien	0:3717b703f76d	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
donatien	0:3717b703f76d	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
donatien	0:3717b703f76d	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
donatien	0:3717b703f76d	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
donatien	0:3717b703f76d	24	*
donatien	0:3717b703f76d	25	******************************************************************************
donatien	0:3717b703f76d	26	* REVISION HISTORY
donatien	0:3717b703f76d	27	*
donatien	0:3717b703f76d	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
donatien	0:3717b703f76d	29	* Ported to lwIP.
donatien	0:3717b703f76d	30	* 97-11-05 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
donatien	0:3717b703f76d	31	* Original based on BSD code.
donatien	0:3717b703f76d	32	*****************************************************************************/
donatien	0:3717b703f76d	33	/*
donatien	0:3717b703f76d	34	* fsm.h - {Link, IP} Control Protocol Finite State Machine definitions.
donatien	0:3717b703f76d	35	*
donatien	0:3717b703f76d	36	* Copyright (c) 1989 Carnegie Mellon University.
donatien	0:3717b703f76d	37	* All rights reserved.
donatien	0:3717b703f76d	38	*
donatien	0:3717b703f76d	39	* Redistribution and use in source and binary forms are permitted
donatien	0:3717b703f76d	40	* provided that the above copyright notice and this paragraph are
donatien	0:3717b703f76d	41	* duplicated in all such forms and that any documentation,
donatien	0:3717b703f76d	42	* advertising materials, and other materials related to such
donatien	0:3717b703f76d	43	* distribution and use acknowledge that the software was developed
donatien	0:3717b703f76d	44	* by Carnegie Mellon University. The name of the
donatien	0:3717b703f76d	45	* University may not be used to endorse or promote products derived
donatien	0:3717b703f76d	46	* from this software without specific prior written permission.
donatien	0:3717b703f76d	47	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
donatien	0:3717b703f76d	48	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
donatien	0:3717b703f76d	49	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
donatien	0:3717b703f76d	50	*
donatien	0:3717b703f76d	51	* $Id: fsm.h,v 1.5 2009/12/31 17:08:08 goldsimon Exp $
donatien	0:3717b703f76d	52	*/
donatien	0:3717b703f76d	53
donatien	0:3717b703f76d	54	#ifndef FSM_H
donatien	0:3717b703f76d	55	#define FSM_H
donatien	0:3717b703f76d	56
donatien	0:3717b703f76d	57	/*
donatien	0:3717b703f76d	58	* LCP Packet header = Code, id, length.
donatien	0:3717b703f76d	59	*/
donatien	0:3717b703f76d	60	#define HEADERLEN (sizeof (u_char) + sizeof (u_char) + sizeof (u_short))
donatien	0:3717b703f76d	61
donatien	0:3717b703f76d	62
donatien	0:3717b703f76d	63	/*
donatien	0:3717b703f76d	64	* CP (LCP, IPCP, etc.) codes.
donatien	0:3717b703f76d	65	*/
donatien	0:3717b703f76d	66	#define CONFREQ 1 /* Configuration Request */
donatien	0:3717b703f76d	67	#define CONFACK 2 /* Configuration Ack */
donatien	0:3717b703f76d	68	#define CONFNAK 3 /* Configuration Nak */
donatien	0:3717b703f76d	69	#define CONFREJ 4 /* Configuration Reject */
donatien	0:3717b703f76d	70	#define TERMREQ 5 /* Termination Request */
donatien	0:3717b703f76d	71	#define TERMACK 6 /* Termination Ack */
donatien	0:3717b703f76d	72	#define CODEREJ 7 /* Code Reject */
donatien	0:3717b703f76d	73
donatien	0:3717b703f76d	74
donatien	0:3717b703f76d	75	/*
donatien	0:3717b703f76d	76	* Each FSM is described by an fsm structure and fsm callbacks.
donatien	0:3717b703f76d	77	*/
donatien	0:3717b703f76d	78	typedef struct fsm {
donatien	0:3717b703f76d	79	int unit; /* Interface unit number */
donatien	0:3717b703f76d	80	u_short protocol; /* Data Link Layer Protocol field value */
donatien	0:3717b703f76d	81	int state; /* State */
donatien	0:3717b703f76d	82	int flags; /* Contains option bits */
donatien	0:3717b703f76d	83	u_char id; /* Current id */
donatien	0:3717b703f76d	84	u_char reqid; /* Current request id */
donatien	0:3717b703f76d	85	u_char seen_ack; /* Have received valid Ack/Nak/Rej to Req */
donatien	0:3717b703f76d	86	int timeouttime; /* Timeout time in milliseconds */
donatien	0:3717b703f76d	87	int maxconfreqtransmits; /* Maximum Configure-Request transmissions */
donatien	0:3717b703f76d	88	int retransmits; /* Number of retransmissions left */
donatien	0:3717b703f76d	89	int maxtermtransmits; /* Maximum Terminate-Request transmissions */
donatien	0:3717b703f76d	90	int nakloops; /* Number of nak loops since last ack */
donatien	0:3717b703f76d	91	int maxnakloops; /* Maximum number of nak loops tolerated */
donatien	0:3717b703f76d	92	struct fsm_callbacks* callbacks; /* Callback routines */
donatien	0:3717b703f76d	93	char* term_reason; /* Reason for closing protocol */
donatien	0:3717b703f76d	94	int term_reason_len; /* Length of term_reason */
donatien	0:3717b703f76d	95	} fsm;
donatien	0:3717b703f76d	96
donatien	0:3717b703f76d	97
donatien	0:3717b703f76d	98	typedef struct fsm_callbacks {
donatien	0:3717b703f76d	99	void (resetci)(fsm); /* Reset our Configuration Information */
donatien	0:3717b703f76d	100	int (cilen)(fsm); /* Length of our Configuration Information */
donatien	0:3717b703f76d	101	void (addci)(fsm, u_char, int); /* Add our Configuration Information */
donatien	0:3717b703f76d	102	int (ackci)(fsm, u_char, int); / ACK our Configuration Information */
donatien	0:3717b703f76d	103	int (nakci)(fsm, u_char, int); / NAK our Configuration Information */
donatien	0:3717b703f76d	104	int (rejci)(fsm, u_char, int); / Reject our Configuration Information */
donatien	0:3717b703f76d	105	int (reqci)(fsm, u_char, int, int); /* Request peer's Configuration Information */
donatien	0:3717b703f76d	106	void (up)(fsm); /* Called when fsm reaches LS_OPENED state */
donatien	0:3717b703f76d	107	void (down)(fsm); /* Called when fsm leaves LS_OPENED state */
donatien	0:3717b703f76d	108	void (starting)(fsm); /* Called when we want the lower layer */
donatien	0:3717b703f76d	109	void (finished)(fsm); /* Called when we don't want the lower layer */
donatien	0:3717b703f76d	110	void (protreject)(int); / Called when Protocol-Reject received */
donatien	0:3717b703f76d	111	void (retransmit)(fsm); /* Retransmission is necessary */
donatien	0:3717b703f76d	112	int (extcode)(fsm, int, u_char, u_char, int); / Called when unknown code received */
donatien	0:3717b703f76d	113	char proto_name; / String name for protocol (for messages) */
donatien	0:3717b703f76d	114	} fsm_callbacks;
donatien	0:3717b703f76d	115
donatien	0:3717b703f76d	116
donatien	0:3717b703f76d	117	/*
donatien	0:3717b703f76d	118	* Link states.
donatien	0:3717b703f76d	119	*/
donatien	0:3717b703f76d	120	#define LS_INITIAL 0 /* Down, hasn't been opened */
donatien	0:3717b703f76d	121	#define LS_STARTING 1 /* Down, been opened */
donatien	0:3717b703f76d	122	#define LS_CLOSED 2 /* Up, hasn't been opened */
donatien	0:3717b703f76d	123	#define LS_STOPPED 3 /* Open, waiting for down event */
donatien	0:3717b703f76d	124	#define LS_CLOSING 4 /* Terminating the connection, not open */
donatien	0:3717b703f76d	125	#define LS_STOPPING 5 /* Terminating, but open */
donatien	0:3717b703f76d	126	#define LS_REQSENT 6 /* We've sent a Config Request */
donatien	0:3717b703f76d	127	#define LS_ACKRCVD 7 /* We've received a Config Ack */
donatien	0:3717b703f76d	128	#define LS_ACKSENT 8 /* We've sent a Config Ack */
donatien	0:3717b703f76d	129	#define LS_OPENED 9 /* Connection available */
donatien	0:3717b703f76d	130
donatien	0:3717b703f76d	131	/*
donatien	0:3717b703f76d	132	* Flags - indicate options controlling FSM operation
donatien	0:3717b703f76d	133	*/
donatien	0:3717b703f76d	134	#define OPT_PASSIVE 1 /* Don't die if we don't get a response */
donatien	0:3717b703f76d	135	#define OPT_RESTART 2 /* Treat 2nd OPEN as DOWN, UP */
donatien	0:3717b703f76d	136	#define OPT_SILENT 4 /* Wait for peer to speak first */
donatien	0:3717b703f76d	137
donatien	0:3717b703f76d	138
donatien	0:3717b703f76d	139	/*
donatien	0:3717b703f76d	140	* Prototypes
donatien	0:3717b703f76d	141	*/
donatien	0:3717b703f76d	142	void fsm_init (fsm*);
donatien	0:3717b703f76d	143	void fsm_lowerup (fsm*);
donatien	0:3717b703f76d	144	void fsm_lowerdown (fsm*);
donatien	0:3717b703f76d	145	void fsm_open (fsm*);
donatien	0:3717b703f76d	146	void fsm_close (fsm, char);
donatien	0:3717b703f76d	147	void fsm_input (fsm, u_char, int);
donatien	0:3717b703f76d	148	void fsm_protreject (fsm*);
donatien	0:3717b703f76d	149	void fsm_sdata (fsm, u_char, u_char, u_char, int);
donatien	0:3717b703f76d	150
donatien	0:3717b703f76d	151
donatien	0:3717b703f76d	152	/*
donatien	0:3717b703f76d	153	* Variables
donatien	0:3717b703f76d	154	*/
donatien	0:3717b703f76d	155	extern int peer_mru[]; /* currently negotiated peer MRU (per unit) */
donatien	0:3717b703f76d	156
donatien	0:3717b703f76d	157	#endif /* FSM_H */

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Type:	Program
Created:	24 May 2010
Imports:	456
Forks:	0
Commits:	4
Dependents:	4
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lwip/netif/ppp/fsm.h@0:3717b703f76d, 2010-05-24 (annotated)

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