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lwip/netif/ppp/fsm.h@0:281d6ff68967, 2010-11-19 (annotated)

Committer:: hexley
Date:: Fri Nov 19 01:54:45 2010 +0000
Revision:: 0:281d6ff68967

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User	Revision	Line number	New contents of line
hexley	0:281d6ff68967	1	/*****************************************************************************
hexley	0:281d6ff68967	2	* fsm.h - Network Control Protocol Finite State Machine header file.
hexley	0:281d6ff68967	3	*
hexley	0:281d6ff68967	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
hexley	0:281d6ff68967	5	* Copyright (c) 1997 Global Election Systems Inc.
hexley	0:281d6ff68967	6	*
hexley	0:281d6ff68967	7	* The authors hereby grant permission to use, copy, modify, distribute,
hexley	0:281d6ff68967	8	* and license this software and its documentation for any purpose, provided
hexley	0:281d6ff68967	9	* that existing copyright notices are retained in all copies and that this
hexley	0:281d6ff68967	10	* notice and the following disclaimer are included verbatim in any
hexley	0:281d6ff68967	11	* distributions. No written agreement, license, or royalty fee is required
hexley	0:281d6ff68967	12	* for any of the authorized uses.
hexley	0:281d6ff68967	13	*
hexley	0:281d6ff68967	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
hexley	0:281d6ff68967	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
hexley	0:281d6ff68967	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
hexley	0:281d6ff68967	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
hexley	0:281d6ff68967	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
hexley	0:281d6ff68967	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
hexley	0:281d6ff68967	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
hexley	0:281d6ff68967	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
hexley	0:281d6ff68967	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
hexley	0:281d6ff68967	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
hexley	0:281d6ff68967	24	*
hexley	0:281d6ff68967	25	******************************************************************************
hexley	0:281d6ff68967	26	* REVISION HISTORY
hexley	0:281d6ff68967	27	*
hexley	0:281d6ff68967	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
hexley	0:281d6ff68967	29	* Ported to lwIP.
hexley	0:281d6ff68967	30	* 97-11-05 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
hexley	0:281d6ff68967	31	* Original based on BSD code.
hexley	0:281d6ff68967	32	*****************************************************************************/
hexley	0:281d6ff68967	33	/*
hexley	0:281d6ff68967	34	* fsm.h - {Link, IP} Control Protocol Finite State Machine definitions.
hexley	0:281d6ff68967	35	*
hexley	0:281d6ff68967	36	* Copyright (c) 1989 Carnegie Mellon University.
hexley	0:281d6ff68967	37	* All rights reserved.
hexley	0:281d6ff68967	38	*
hexley	0:281d6ff68967	39	* Redistribution and use in source and binary forms are permitted
hexley	0:281d6ff68967	40	* provided that the above copyright notice and this paragraph are
hexley	0:281d6ff68967	41	* duplicated in all such forms and that any documentation,
hexley	0:281d6ff68967	42	* advertising materials, and other materials related to such
hexley	0:281d6ff68967	43	* distribution and use acknowledge that the software was developed
hexley	0:281d6ff68967	44	* by Carnegie Mellon University. The name of the
hexley	0:281d6ff68967	45	* University may not be used to endorse or promote products derived
hexley	0:281d6ff68967	46	* from this software without specific prior written permission.
hexley	0:281d6ff68967	47	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
hexley	0:281d6ff68967	48	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
hexley	0:281d6ff68967	49	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
hexley	0:281d6ff68967	50	*
hexley	0:281d6ff68967	51	* $Id: fsm.h,v 1.5 2009/12/31 17:08:08 goldsimon Exp $
hexley	0:281d6ff68967	52	*/
hexley	0:281d6ff68967	53
hexley	0:281d6ff68967	54	#ifndef FSM_H
hexley	0:281d6ff68967	55	#define FSM_H
hexley	0:281d6ff68967	56
hexley	0:281d6ff68967	57	/*
hexley	0:281d6ff68967	58	* LCP Packet header = Code, id, length.
hexley	0:281d6ff68967	59	*/
hexley	0:281d6ff68967	60	#define HEADERLEN (sizeof (u_char) + sizeof (u_char) + sizeof (u_short))
hexley	0:281d6ff68967	61
hexley	0:281d6ff68967	62
hexley	0:281d6ff68967	63	/*
hexley	0:281d6ff68967	64	* CP (LCP, IPCP, etc.) codes.
hexley	0:281d6ff68967	65	*/
hexley	0:281d6ff68967	66	#define CONFREQ 1 /* Configuration Request */
hexley	0:281d6ff68967	67	#define CONFACK 2 /* Configuration Ack */
hexley	0:281d6ff68967	68	#define CONFNAK 3 /* Configuration Nak */
hexley	0:281d6ff68967	69	#define CONFREJ 4 /* Configuration Reject */
hexley	0:281d6ff68967	70	#define TERMREQ 5 /* Termination Request */
hexley	0:281d6ff68967	71	#define TERMACK 6 /* Termination Ack */
hexley	0:281d6ff68967	72	#define CODEREJ 7 /* Code Reject */
hexley	0:281d6ff68967	73
hexley	0:281d6ff68967	74
hexley	0:281d6ff68967	75	/*
hexley	0:281d6ff68967	76	* Each FSM is described by an fsm structure and fsm callbacks.
hexley	0:281d6ff68967	77	*/
hexley	0:281d6ff68967	78	typedef struct fsm {
hexley	0:281d6ff68967	79	int unit; /* Interface unit number */
hexley	0:281d6ff68967	80	u_short protocol; /* Data Link Layer Protocol field value */
hexley	0:281d6ff68967	81	int state; /* State */
hexley	0:281d6ff68967	82	int flags; /* Contains option bits */
hexley	0:281d6ff68967	83	u_char id; /* Current id */
hexley	0:281d6ff68967	84	u_char reqid; /* Current request id */
hexley	0:281d6ff68967	85	u_char seen_ack; /* Have received valid Ack/Nak/Rej to Req */
hexley	0:281d6ff68967	86	int timeouttime; /* Timeout time in milliseconds */
hexley	0:281d6ff68967	87	int maxconfreqtransmits; /* Maximum Configure-Request transmissions */
hexley	0:281d6ff68967	88	int retransmits; /* Number of retransmissions left */
hexley	0:281d6ff68967	89	int maxtermtransmits; /* Maximum Terminate-Request transmissions */
hexley	0:281d6ff68967	90	int nakloops; /* Number of nak loops since last ack */
hexley	0:281d6ff68967	91	int maxnakloops; /* Maximum number of nak loops tolerated */
hexley	0:281d6ff68967	92	struct fsm_callbacks* callbacks; /* Callback routines */
hexley	0:281d6ff68967	93	char* term_reason; /* Reason for closing protocol */
hexley	0:281d6ff68967	94	int term_reason_len; /* Length of term_reason */
hexley	0:281d6ff68967	95	} fsm;
hexley	0:281d6ff68967	96
hexley	0:281d6ff68967	97
hexley	0:281d6ff68967	98	typedef struct fsm_callbacks {
hexley	0:281d6ff68967	99	void (resetci)(fsm); /* Reset our Configuration Information */
hexley	0:281d6ff68967	100	int (cilen)(fsm); /* Length of our Configuration Information */
hexley	0:281d6ff68967	101	void (addci)(fsm, u_char, int); /* Add our Configuration Information */
hexley	0:281d6ff68967	102	int (ackci)(fsm, u_char, int); / ACK our Configuration Information */
hexley	0:281d6ff68967	103	int (nakci)(fsm, u_char, int); / NAK our Configuration Information */
hexley	0:281d6ff68967	104	int (rejci)(fsm, u_char, int); / Reject our Configuration Information */
hexley	0:281d6ff68967	105	int (reqci)(fsm, u_char, int, int); /* Request peer's Configuration Information */
hexley	0:281d6ff68967	106	void (up)(fsm); /* Called when fsm reaches LS_OPENED state */
hexley	0:281d6ff68967	107	void (down)(fsm); /* Called when fsm leaves LS_OPENED state */
hexley	0:281d6ff68967	108	void (starting)(fsm); /* Called when we want the lower layer */
hexley	0:281d6ff68967	109	void (finished)(fsm); /* Called when we don't want the lower layer */
hexley	0:281d6ff68967	110	void (protreject)(int); / Called when Protocol-Reject received */
hexley	0:281d6ff68967	111	void (retransmit)(fsm); /* Retransmission is necessary */
hexley	0:281d6ff68967	112	int (extcode)(fsm, int, u_char, u_char, int); / Called when unknown code received */
hexley	0:281d6ff68967	113	char proto_name; / String name for protocol (for messages) */
hexley	0:281d6ff68967	114	} fsm_callbacks;
hexley	0:281d6ff68967	115
hexley	0:281d6ff68967	116
hexley	0:281d6ff68967	117	/*
hexley	0:281d6ff68967	118	* Link states.
hexley	0:281d6ff68967	119	*/
hexley	0:281d6ff68967	120	#define LS_INITIAL 0 /* Down, hasn't been opened */
hexley	0:281d6ff68967	121	#define LS_STARTING 1 /* Down, been opened */
hexley	0:281d6ff68967	122	#define LS_CLOSED 2 /* Up, hasn't been opened */
hexley	0:281d6ff68967	123	#define LS_STOPPED 3 /* Open, waiting for down event */
hexley	0:281d6ff68967	124	#define LS_CLOSING 4 /* Terminating the connection, not open */
hexley	0:281d6ff68967	125	#define LS_STOPPING 5 /* Terminating, but open */
hexley	0:281d6ff68967	126	#define LS_REQSENT 6 /* We've sent a Config Request */
hexley	0:281d6ff68967	127	#define LS_ACKRCVD 7 /* We've received a Config Ack */
hexley	0:281d6ff68967	128	#define LS_ACKSENT 8 /* We've sent a Config Ack */
hexley	0:281d6ff68967	129	#define LS_OPENED 9 /* Connection available */
hexley	0:281d6ff68967	130
hexley	0:281d6ff68967	131	/*
hexley	0:281d6ff68967	132	* Flags - indicate options controlling FSM operation
hexley	0:281d6ff68967	133	*/
hexley	0:281d6ff68967	134	#define OPT_PASSIVE 1 /* Don't die if we don't get a response */
hexley	0:281d6ff68967	135	#define OPT_RESTART 2 /* Treat 2nd OPEN as DOWN, UP */
hexley	0:281d6ff68967	136	#define OPT_SILENT 4 /* Wait for peer to speak first */
hexley	0:281d6ff68967	137
hexley	0:281d6ff68967	138
hexley	0:281d6ff68967	139	/*
hexley	0:281d6ff68967	140	* Prototypes
hexley	0:281d6ff68967	141	*/
hexley	0:281d6ff68967	142	void fsm_init (fsm*);
hexley	0:281d6ff68967	143	void fsm_lowerup (fsm*);
hexley	0:281d6ff68967	144	void fsm_lowerdown (fsm*);
hexley	0:281d6ff68967	145	void fsm_open (fsm*);
hexley	0:281d6ff68967	146	void fsm_close (fsm, char);
hexley	0:281d6ff68967	147	void fsm_input (fsm, u_char, int);
hexley	0:281d6ff68967	148	void fsm_protreject (fsm*);
hexley	0:281d6ff68967	149	void fsm_sdata (fsm, u_char, u_char, u_char, int);
hexley	0:281d6ff68967	150
hexley	0:281d6ff68967	151
hexley	0:281d6ff68967	152	/*
hexley	0:281d6ff68967	153	* Variables
hexley	0:281d6ff68967	154	*/
hexley	0:281d6ff68967	155	extern int peer_mru[]; /* currently negotiated peer MRU (per unit) */
hexley	0:281d6ff68967	156
hexley	0:281d6ff68967	157	#endif /* FSM_H */

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Type:	Library
Created:	19 Nov 2010
Imports:	44
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	1

lwip/netif/ppp/fsm.h@0:281d6ff68967, 2010-11-19 (annotated)

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