fsm.h

Revision 14, 7.5 kB (checked in by phil, 15 years ago)
added unmodified FreeRTOS package V5.4.1 with only web srv demo source for LPC2368 for CrossWorks?

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1	/*****************************************************************************
2	* fsm.h - Network Control Protocol Finite State Machine header file.
3	*
4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
5	* Copyright (c) 1997 Global Election Systems Inc.
6	*
7	* The authors hereby grant permission to use, copy, modify, distribute,
8	* and license this software and its documentation for any purpose, provided
9	* that existing copyright notices are retained in all copies and that this
10	* notice and the following disclaimer are included verbatim in any
11	* distributions. No written agreement, license, or royalty fee is required
12	* for any of the authorized uses.
13	*
14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24	*
25	******************************************************************************
26	* REVISION HISTORY
27	*
28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
29	* Ported to lwIP.
30	* 97-11-05 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
31	* Original based on BSD code.
32	*****************************************************************************/
33	/*
34	* fsm.h - {Link, IP} Control Protocol Finite State Machine definitions.
35	*
36	* Copyright (c) 1989 Carnegie Mellon University.
37	* All rights reserved.
38	*
39	* Redistribution and use in source and binary forms are permitted
40	* provided that the above copyright notice and this paragraph are
41	* duplicated in all such forms and that any documentation,
42	* advertising materials, and other materials related to such
43	* distribution and use acknowledge that the software was developed
44	* by Carnegie Mellon University. The name of the
45	* University may not be used to endorse or promote products derived
46	* from this software without specific prior written permission.
47	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
48	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
49	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
50	*
51	* $Id: fsm.h,v 1.1 2003/05/27 14:37:56 jani Exp $
52	*/
53
54	#ifndef FSM_H
55	#define FSM_H
56
57
58	/*****************************************************************************
59	*********************** PUBLIC DEFINITIONS *******************************
60	*****************************************************************************/
61	/*
62	* LCP Packet header = Code, id, length.
63	*/
64	#define HEADERLEN (sizeof (u_char) + sizeof (u_char) + sizeof (u_short))
65
66
67	/*
68	* CP (LCP, IPCP, etc.) codes.
69	*/
70	#define CONFREQ 1 /* Configuration Request */
71	#define CONFACK 2 /* Configuration Ack */
72	#define CONFNAK 3 /* Configuration Nak */
73	#define CONFREJ 4 /* Configuration Reject */
74	#define TERMREQ 5 /* Termination Request */
75	#define TERMACK 6 /* Termination Ack */
76	#define CODEREJ 7 /* Code Reject */
77
78	/*
79	* Link states.
80	*/
81	#define INITIAL 0 /* Down, hasn't been opened */
82	#define STARTING 1 /* Down, been opened */
83	#define CLOSED 2 /* Up, hasn't been opened */
84	#define STOPPED 3 /* Open, waiting for down event */
85	#define CLOSING 4 /* Terminating the connection, not open */
86	#define STOPPING 5 /* Terminating, but open */
87	#define REQSENT 6 /* We've sent a Config Request */
88	#define ACKRCVD 7 /* We've received a Config Ack */
89	#define ACKSENT 8 /* We've sent a Config Ack */
90	#define OPENED 9 /* Connection available */
91
92
93	/*
94	* Flags - indicate options controlling FSM operation
95	*/
96	#define OPT_PASSIVE 1 /* Don't die if we don't get a response */
97	#define OPT_RESTART 2 /* Treat 2nd OPEN as DOWN, UP */
98	#define OPT_SILENT 4 /* Wait for peer to speak first */
99
100
101	/*****************************************************************************
102	*********************** PUBLIC DATA TYPES ********************************
103	*****************************************************************************/
104	/*
105	* Each FSM is described by an fsm structure and fsm callbacks.
106	*/
107	typedef struct fsm {
108	int unit; /* Interface unit number */
109	u_short protocol; /* Data Link Layer Protocol field value */
110	int state; /* State */
111	int flags; /* Contains option bits */
112	u_char id; /* Current id */
113	u_char reqid; /* Current request id */
114	u_char seen_ack; /* Have received valid Ack/Nak/Rej to Req */
115	int timeouttime; /* Timeout time in milliseconds */
116	int maxconfreqtransmits;/* Maximum Configure-Request transmissions */
117	int retransmits; /* Number of retransmissions left */
118	int maxtermtransmits; /* Maximum Terminate-Request transmissions */
119	int nakloops; /* Number of nak loops since last ack */
120	int maxnakloops; /* Maximum number of nak loops tolerated */
121	struct fsm_callbacks* callbacks;/* Callback routines */
122	char* term_reason; /* Reason for closing protocol */
123	int term_reason_len; /* Length of term_reason */
124	} fsm;
125
126
127	typedef struct fsm_callbacks {
128	void (resetci) / Reset our Configuration Information */
129	(fsm*);
130	int (cilen) / Length of our Configuration Information */
131	(fsm*);
132	void (addci) / Add our Configuration Information */
133	(fsm, u_char, int*);
134	int (ackci) / ACK our Configuration Information */
135	(fsm, u_char, int);
136	int (nakci) / NAK our Configuration Information */
137	(fsm, u_char, int);
138	int (rejci) / Reject our Configuration Information */
139	(fsm, u_char, int);
140	int (reqci) / Request peer's Configuration Information */
141	(fsm, u_char, int*, int);
142	void (up) / Called when fsm reaches OPENED state */
143	(fsm*);
144	void (down) / Called when fsm leaves OPENED state */
145	(fsm*);
146	void (starting) / Called when we want the lower layer */
147	(fsm*);
148	void (finished) / Called when we don't want the lower layer */
149	(fsm*);
150	void (protreject) / Called when Protocol-Reject received */
151	(int);
152	void (retransmit) / Retransmission is necessary */
153	(fsm*);
154	int (extcode) / Called when unknown code received */
155	(fsm, int, u_char, u_char, int);
156	char proto_name; / String name for protocol (for messages) */
157	} fsm_callbacks;
158
159
160	/*****************************************************************************
161	********************* PUBLIC DATA STRUCTURES *****************************
162	*****************************************************************************/
163	/*
164	* Variables
165	*/
166	extern int peer_mru[]; /* currently negotiated peer MRU (per unit) */
167
168
169	/*****************************************************************************
170	************************ PUBLIC FUNCTIONS ********************************
171	*****************************************************************************/
172
173	/*
174	* Prototypes
175	*/
176	void fsm_init (fsm*);
177	void fsm_lowerup (fsm*);
178	void fsm_lowerdown (fsm*);
179	void fsm_open (fsm*);
180	void fsm_close (fsm, char);
181	void fsm_input (fsm, u_char, int);
182	void fsm_protreject (fsm*);
183	void fsm_sdata (fsm, u_char, u_char, u_char, int);
184
185
186	#endif /* FSM_H */
187

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