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This library is stripped down version of NetServices library. HTTP server and client function is NOT supported.

lwip/netif/ppp/fsm.c@0:dcf3c92487ca, 2011-07-20 (annotated)

Committer:: idinor
Date:: Wed Jul 20 11:45:39 2011 +0000
Revision:: 0:dcf3c92487ca

Who changed what in which revision?

User	Revision	Line number	New contents of line
idinor	0:dcf3c92487ca	1	/*****************************************************************************
idinor	0:dcf3c92487ca	2	* fsm.c - Network Control Protocol Finite State Machine program file.
idinor	0:dcf3c92487ca	3	*
idinor	0:dcf3c92487ca	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
idinor	0:dcf3c92487ca	5	* portions Copyright (c) 1997 by Global Election Systems Inc.
idinor	0:dcf3c92487ca	6	*
idinor	0:dcf3c92487ca	7	* The authors hereby grant permission to use, copy, modify, distribute,
idinor	0:dcf3c92487ca	8	* and license this software and its documentation for any purpose, provided
idinor	0:dcf3c92487ca	9	* that existing copyright notices are retained in all copies and that this
idinor	0:dcf3c92487ca	10	* notice and the following disclaimer are included verbatim in any
idinor	0:dcf3c92487ca	11	* distributions. No written agreement, license, or royalty fee is required
idinor	0:dcf3c92487ca	12	* for any of the authorized uses.
idinor	0:dcf3c92487ca	13	*
idinor	0:dcf3c92487ca	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
idinor	0:dcf3c92487ca	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
idinor	0:dcf3c92487ca	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
idinor	0:dcf3c92487ca	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
idinor	0:dcf3c92487ca	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
idinor	0:dcf3c92487ca	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
idinor	0:dcf3c92487ca	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
idinor	0:dcf3c92487ca	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
idinor	0:dcf3c92487ca	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
idinor	0:dcf3c92487ca	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
idinor	0:dcf3c92487ca	24	*
idinor	0:dcf3c92487ca	25	******************************************************************************
idinor	0:dcf3c92487ca	26	* REVISION HISTORY
idinor	0:dcf3c92487ca	27	*
idinor	0:dcf3c92487ca	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
idinor	0:dcf3c92487ca	29	* Ported to lwIP.
idinor	0:dcf3c92487ca	30	* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
idinor	0:dcf3c92487ca	31	* Original based on BSD fsm.c.
idinor	0:dcf3c92487ca	32	*****************************************************************************/
idinor	0:dcf3c92487ca	33	/*
idinor	0:dcf3c92487ca	34	* fsm.c - {Link, IP} Control Protocol Finite State Machine.
idinor	0:dcf3c92487ca	35	*
idinor	0:dcf3c92487ca	36	* Copyright (c) 1989 Carnegie Mellon University.
idinor	0:dcf3c92487ca	37	* All rights reserved.
idinor	0:dcf3c92487ca	38	*
idinor	0:dcf3c92487ca	39	* Redistribution and use in source and binary forms are permitted
idinor	0:dcf3c92487ca	40	* provided that the above copyright notice and this paragraph are
idinor	0:dcf3c92487ca	41	* duplicated in all such forms and that any documentation,
idinor	0:dcf3c92487ca	42	* advertising materials, and other materials related to such
idinor	0:dcf3c92487ca	43	* distribution and use acknowledge that the software was developed
idinor	0:dcf3c92487ca	44	* by Carnegie Mellon University. The name of the
idinor	0:dcf3c92487ca	45	* University may not be used to endorse or promote products derived
idinor	0:dcf3c92487ca	46	* from this software without specific prior written permission.
idinor	0:dcf3c92487ca	47	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
idinor	0:dcf3c92487ca	48	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
idinor	0:dcf3c92487ca	49	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
idinor	0:dcf3c92487ca	50	*/
idinor	0:dcf3c92487ca	51
idinor	0:dcf3c92487ca	52	/*
idinor	0:dcf3c92487ca	53	* TODO:
idinor	0:dcf3c92487ca	54	* Randomize fsm id on link/init.
idinor	0:dcf3c92487ca	55	* Deal with variable outgoing MTU.
idinor	0:dcf3c92487ca	56	*/
idinor	0:dcf3c92487ca	57
idinor	0:dcf3c92487ca	58	#include "lwip/opt.h"
idinor	0:dcf3c92487ca	59
idinor	0:dcf3c92487ca	60	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
idinor	0:dcf3c92487ca	61
idinor	0:dcf3c92487ca	62	#include "ppp.h"
idinor	0:dcf3c92487ca	63	#include "pppdebug.h"
idinor	0:dcf3c92487ca	64
idinor	0:dcf3c92487ca	65	#include "fsm.h"
idinor	0:dcf3c92487ca	66
idinor	0:dcf3c92487ca	67	#include <string.h>
idinor	0:dcf3c92487ca	68
idinor	0:dcf3c92487ca	69	#if PPP_DEBUG
idinor	0:dcf3c92487ca	70	static const char *ppperr_strerr[] = {
idinor	0:dcf3c92487ca	71	"LS_INITIAL", /* LS_INITIAL 0 */
idinor	0:dcf3c92487ca	72	"LS_STARTING", /* LS_STARTING 1 */
idinor	0:dcf3c92487ca	73	"LS_CLOSED", /* LS_CLOSED 2 */
idinor	0:dcf3c92487ca	74	"LS_STOPPED", /* LS_STOPPED 3 */
idinor	0:dcf3c92487ca	75	"LS_CLOSING", /* LS_CLOSING 4 */
idinor	0:dcf3c92487ca	76	"LS_STOPPING", /* LS_STOPPING 5 */
idinor	0:dcf3c92487ca	77	"LS_REQSENT", /* LS_REQSENT 6 */
idinor	0:dcf3c92487ca	78	"LS_ACKRCVD", /* LS_ACKRCVD 7 */
idinor	0:dcf3c92487ca	79	"LS_ACKSENT", /* LS_ACKSENT 8 */
idinor	0:dcf3c92487ca	80	"LS_OPENED" /* LS_OPENED 9 */
idinor	0:dcf3c92487ca	81	};
idinor	0:dcf3c92487ca	82	#endif /* PPP_DEBUG */
idinor	0:dcf3c92487ca	83
idinor	0:dcf3c92487ca	84	static void fsm_timeout (void *);
idinor	0:dcf3c92487ca	85	static void fsm_rconfreq (fsm , u_char, u_char , int);
idinor	0:dcf3c92487ca	86	static void fsm_rconfack (fsm , int, u_char , int);
idinor	0:dcf3c92487ca	87	static void fsm_rconfnakrej (fsm , int, int, u_char , int);
idinor	0:dcf3c92487ca	88	static void fsm_rtermreq (fsm , int, u_char , int);
idinor	0:dcf3c92487ca	89	static void fsm_rtermack (fsm *);
idinor	0:dcf3c92487ca	90	static void fsm_rcoderej (fsm , u_char , int);
idinor	0:dcf3c92487ca	91	static void fsm_sconfreq (fsm *, int);
idinor	0:dcf3c92487ca	92
idinor	0:dcf3c92487ca	93	#define PROTO_NAME(f) ((f)->callbacks->proto_name)
idinor	0:dcf3c92487ca	94
idinor	0:dcf3c92487ca	95	int peer_mru[NUM_PPP];
idinor	0:dcf3c92487ca	96
idinor	0:dcf3c92487ca	97
idinor	0:dcf3c92487ca	98	/*
idinor	0:dcf3c92487ca	99	* fsm_init - Initialize fsm.
idinor	0:dcf3c92487ca	100	*
idinor	0:dcf3c92487ca	101	* Initialize fsm state.
idinor	0:dcf3c92487ca	102	*/
idinor	0:dcf3c92487ca	103	void
idinor	0:dcf3c92487ca	104	fsm_init(fsm *f)
idinor	0:dcf3c92487ca	105	{
idinor	0:dcf3c92487ca	106	f->state = LS_INITIAL;
idinor	0:dcf3c92487ca	107	f->flags = 0;
idinor	0:dcf3c92487ca	108	f->id = 0; /* XXX Start with random id? */
idinor	0:dcf3c92487ca	109	f->timeouttime = FSM_DEFTIMEOUT;
idinor	0:dcf3c92487ca	110	f->maxconfreqtransmits = FSM_DEFMAXCONFREQS;
idinor	0:dcf3c92487ca	111	f->maxtermtransmits = FSM_DEFMAXTERMREQS;
idinor	0:dcf3c92487ca	112	f->maxnakloops = FSM_DEFMAXNAKLOOPS;
idinor	0:dcf3c92487ca	113	f->term_reason_len = 0;
idinor	0:dcf3c92487ca	114	}
idinor	0:dcf3c92487ca	115
idinor	0:dcf3c92487ca	116
idinor	0:dcf3c92487ca	117	/*
idinor	0:dcf3c92487ca	118	* fsm_lowerup - The lower layer is up.
idinor	0:dcf3c92487ca	119	*/
idinor	0:dcf3c92487ca	120	void
idinor	0:dcf3c92487ca	121	fsm_lowerup(fsm *f)
idinor	0:dcf3c92487ca	122	{
idinor	0:dcf3c92487ca	123	int oldState = f->state;
idinor	0:dcf3c92487ca	124
idinor	0:dcf3c92487ca	125	LWIP_UNUSED_ARG(oldState);
idinor	0:dcf3c92487ca	126
idinor	0:dcf3c92487ca	127	switch( f->state ) {
idinor	0:dcf3c92487ca	128	case LS_INITIAL:
idinor	0:dcf3c92487ca	129	f->state = LS_CLOSED;
idinor	0:dcf3c92487ca	130	break;
idinor	0:dcf3c92487ca	131
idinor	0:dcf3c92487ca	132	case LS_STARTING:
idinor	0:dcf3c92487ca	133	if( f->flags & OPT_SILENT ) {
idinor	0:dcf3c92487ca	134	f->state = LS_STOPPED;
idinor	0:dcf3c92487ca	135	} else {
idinor	0:dcf3c92487ca	136	/* Send an initial configure-request */
idinor	0:dcf3c92487ca	137	fsm_sconfreq(f, 0);
idinor	0:dcf3c92487ca	138	f->state = LS_REQSENT;
idinor	0:dcf3c92487ca	139	}
idinor	0:dcf3c92487ca	140	break;
idinor	0:dcf3c92487ca	141
idinor	0:dcf3c92487ca	142	default:
idinor	0:dcf3c92487ca	143	FSMDEBUG(LOG_INFO, ("%s: Up event in state %d (%s)!\n",
idinor	0:dcf3c92487ca	144	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	145	}
idinor	0:dcf3c92487ca	146
idinor	0:dcf3c92487ca	147	FSMDEBUG(LOG_INFO, ("%s: lowerup state %d (%s) -> %d (%s)\n",
idinor	0:dcf3c92487ca	148	PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	149	}
idinor	0:dcf3c92487ca	150
idinor	0:dcf3c92487ca	151
idinor	0:dcf3c92487ca	152	/*
idinor	0:dcf3c92487ca	153	* fsm_lowerdown - The lower layer is down.
idinor	0:dcf3c92487ca	154	*
idinor	0:dcf3c92487ca	155	* Cancel all timeouts and inform upper layers.
idinor	0:dcf3c92487ca	156	*/
idinor	0:dcf3c92487ca	157	void
idinor	0:dcf3c92487ca	158	fsm_lowerdown(fsm *f)
idinor	0:dcf3c92487ca	159	{
idinor	0:dcf3c92487ca	160	int oldState = f->state;
idinor	0:dcf3c92487ca	161
idinor	0:dcf3c92487ca	162	LWIP_UNUSED_ARG(oldState);
idinor	0:dcf3c92487ca	163
idinor	0:dcf3c92487ca	164	switch( f->state ) {
idinor	0:dcf3c92487ca	165	case LS_CLOSED:
idinor	0:dcf3c92487ca	166	f->state = LS_INITIAL;
idinor	0:dcf3c92487ca	167	break;
idinor	0:dcf3c92487ca	168
idinor	0:dcf3c92487ca	169	case LS_STOPPED:
idinor	0:dcf3c92487ca	170	f->state = LS_STARTING;
idinor	0:dcf3c92487ca	171	if( f->callbacks->starting ) {
idinor	0:dcf3c92487ca	172	(*f->callbacks->starting)(f);
idinor	0:dcf3c92487ca	173	}
idinor	0:dcf3c92487ca	174	break;
idinor	0:dcf3c92487ca	175
idinor	0:dcf3c92487ca	176	case LS_CLOSING:
idinor	0:dcf3c92487ca	177	f->state = LS_INITIAL;
idinor	0:dcf3c92487ca	178	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
idinor	0:dcf3c92487ca	179	break;
idinor	0:dcf3c92487ca	180
idinor	0:dcf3c92487ca	181	case LS_STOPPING:
idinor	0:dcf3c92487ca	182	case LS_REQSENT:
idinor	0:dcf3c92487ca	183	case LS_ACKRCVD:
idinor	0:dcf3c92487ca	184	case LS_ACKSENT:
idinor	0:dcf3c92487ca	185	f->state = LS_STARTING;
idinor	0:dcf3c92487ca	186	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
idinor	0:dcf3c92487ca	187	break;
idinor	0:dcf3c92487ca	188
idinor	0:dcf3c92487ca	189	case LS_OPENED:
idinor	0:dcf3c92487ca	190	if( f->callbacks->down ) {
idinor	0:dcf3c92487ca	191	(*f->callbacks->down)(f);
idinor	0:dcf3c92487ca	192	}
idinor	0:dcf3c92487ca	193	f->state = LS_STARTING;
idinor	0:dcf3c92487ca	194	break;
idinor	0:dcf3c92487ca	195
idinor	0:dcf3c92487ca	196	default:
idinor	0:dcf3c92487ca	197	FSMDEBUG(LOG_INFO, ("%s: Down event in state %d (%s)!\n",
idinor	0:dcf3c92487ca	198	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	199	}
idinor	0:dcf3c92487ca	200
idinor	0:dcf3c92487ca	201	FSMDEBUG(LOG_INFO, ("%s: lowerdown state %d (%s) -> %d (%s)\n",
idinor	0:dcf3c92487ca	202	PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	203	}
idinor	0:dcf3c92487ca	204
idinor	0:dcf3c92487ca	205
idinor	0:dcf3c92487ca	206	/*
idinor	0:dcf3c92487ca	207	* fsm_open - Link is allowed to come up.
idinor	0:dcf3c92487ca	208	*/
idinor	0:dcf3c92487ca	209	void
idinor	0:dcf3c92487ca	210	fsm_open(fsm *f)
idinor	0:dcf3c92487ca	211	{
idinor	0:dcf3c92487ca	212	int oldState = f->state;
idinor	0:dcf3c92487ca	213
idinor	0:dcf3c92487ca	214	LWIP_UNUSED_ARG(oldState);
idinor	0:dcf3c92487ca	215
idinor	0:dcf3c92487ca	216	switch( f->state ) {
idinor	0:dcf3c92487ca	217	case LS_INITIAL:
idinor	0:dcf3c92487ca	218	f->state = LS_STARTING;
idinor	0:dcf3c92487ca	219	if( f->callbacks->starting ) {
idinor	0:dcf3c92487ca	220	(*f->callbacks->starting)(f);
idinor	0:dcf3c92487ca	221	}
idinor	0:dcf3c92487ca	222	break;
idinor	0:dcf3c92487ca	223
idinor	0:dcf3c92487ca	224	case LS_CLOSED:
idinor	0:dcf3c92487ca	225	if( f->flags & OPT_SILENT ) {
idinor	0:dcf3c92487ca	226	f->state = LS_STOPPED;
idinor	0:dcf3c92487ca	227	} else {
idinor	0:dcf3c92487ca	228	/* Send an initial configure-request */
idinor	0:dcf3c92487ca	229	fsm_sconfreq(f, 0);
idinor	0:dcf3c92487ca	230	f->state = LS_REQSENT;
idinor	0:dcf3c92487ca	231	}
idinor	0:dcf3c92487ca	232	break;
idinor	0:dcf3c92487ca	233
idinor	0:dcf3c92487ca	234	case LS_CLOSING:
idinor	0:dcf3c92487ca	235	f->state = LS_STOPPING;
idinor	0:dcf3c92487ca	236	/* fall through */
idinor	0:dcf3c92487ca	237	case LS_STOPPED:
idinor	0:dcf3c92487ca	238	case LS_OPENED:
idinor	0:dcf3c92487ca	239	if( f->flags & OPT_RESTART ) {
idinor	0:dcf3c92487ca	240	fsm_lowerdown(f);
idinor	0:dcf3c92487ca	241	fsm_lowerup(f);
idinor	0:dcf3c92487ca	242	}
idinor	0:dcf3c92487ca	243	break;
idinor	0:dcf3c92487ca	244	}
idinor	0:dcf3c92487ca	245
idinor	0:dcf3c92487ca	246	FSMDEBUG(LOG_INFO, ("%s: open state %d (%s) -> %d (%s)\n",
idinor	0:dcf3c92487ca	247	PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	248	}
idinor	0:dcf3c92487ca	249
idinor	0:dcf3c92487ca	250	#if 0 /* backport pppd 2.4.4b1; */
idinor	0:dcf3c92487ca	251	/*
idinor	0:dcf3c92487ca	252	* terminate_layer - Start process of shutting down the FSM
idinor	0:dcf3c92487ca	253	*
idinor	0:dcf3c92487ca	254	* Cancel any timeout running, notify upper layers we're done, and
idinor	0:dcf3c92487ca	255	* send a terminate-request message as configured.
idinor	0:dcf3c92487ca	256	*/
idinor	0:dcf3c92487ca	257	static void
idinor	0:dcf3c92487ca	258	terminate_layer(fsm *f, int nextstate)
idinor	0:dcf3c92487ca	259	{
idinor	0:dcf3c92487ca	260	/* @todo */
idinor	0:dcf3c92487ca	261	}
idinor	0:dcf3c92487ca	262	#endif
idinor	0:dcf3c92487ca	263
idinor	0:dcf3c92487ca	264	/*
idinor	0:dcf3c92487ca	265	* fsm_close - Start closing connection.
idinor	0:dcf3c92487ca	266	*
idinor	0:dcf3c92487ca	267	* Cancel timeouts and either initiate close or possibly go directly to
idinor	0:dcf3c92487ca	268	* the LS_CLOSED state.
idinor	0:dcf3c92487ca	269	*/
idinor	0:dcf3c92487ca	270	void
idinor	0:dcf3c92487ca	271	fsm_close(fsm f, char reason)
idinor	0:dcf3c92487ca	272	{
idinor	0:dcf3c92487ca	273	int oldState = f->state;
idinor	0:dcf3c92487ca	274
idinor	0:dcf3c92487ca	275	LWIP_UNUSED_ARG(oldState);
idinor	0:dcf3c92487ca	276
idinor	0:dcf3c92487ca	277	f->term_reason = reason;
idinor	0:dcf3c92487ca	278	f->term_reason_len = (reason == NULL ? 0 : (int)strlen(reason));
idinor	0:dcf3c92487ca	279	switch( f->state ) {
idinor	0:dcf3c92487ca	280	case LS_STARTING:
idinor	0:dcf3c92487ca	281	f->state = LS_INITIAL;
idinor	0:dcf3c92487ca	282	break;
idinor	0:dcf3c92487ca	283	case LS_STOPPED:
idinor	0:dcf3c92487ca	284	f->state = LS_CLOSED;
idinor	0:dcf3c92487ca	285	break;
idinor	0:dcf3c92487ca	286	case LS_STOPPING:
idinor	0:dcf3c92487ca	287	f->state = LS_CLOSING;
idinor	0:dcf3c92487ca	288	break;
idinor	0:dcf3c92487ca	289
idinor	0:dcf3c92487ca	290	case LS_REQSENT:
idinor	0:dcf3c92487ca	291	case LS_ACKRCVD:
idinor	0:dcf3c92487ca	292	case LS_ACKSENT:
idinor	0:dcf3c92487ca	293	case LS_OPENED:
idinor	0:dcf3c92487ca	294	if( f->state != LS_OPENED ) {
idinor	0:dcf3c92487ca	295	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
idinor	0:dcf3c92487ca	296	} else if( f->callbacks->down ) {
idinor	0:dcf3c92487ca	297	(f->callbacks->down)(f); / Inform upper layers we're down */
idinor	0:dcf3c92487ca	298	}
idinor	0:dcf3c92487ca	299	/* Init restart counter, send Terminate-Request */
idinor	0:dcf3c92487ca	300	f->retransmits = f->maxtermtransmits;
idinor	0:dcf3c92487ca	301	fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
idinor	0:dcf3c92487ca	302	(u_char *) f->term_reason, f->term_reason_len);
idinor	0:dcf3c92487ca	303	TIMEOUT(fsm_timeout, f, f->timeouttime);
idinor	0:dcf3c92487ca	304	--f->retransmits;
idinor	0:dcf3c92487ca	305
idinor	0:dcf3c92487ca	306	f->state = LS_CLOSING;
idinor	0:dcf3c92487ca	307	break;
idinor	0:dcf3c92487ca	308	}
idinor	0:dcf3c92487ca	309
idinor	0:dcf3c92487ca	310	FSMDEBUG(LOG_INFO, ("%s: close reason=%s state %d (%s) -> %d (%s)\n",
idinor	0:dcf3c92487ca	311	PROTO_NAME(f), reason, oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	312	}
idinor	0:dcf3c92487ca	313
idinor	0:dcf3c92487ca	314
idinor	0:dcf3c92487ca	315	/*
idinor	0:dcf3c92487ca	316	* fsm_timeout - Timeout expired.
idinor	0:dcf3c92487ca	317	*/
idinor	0:dcf3c92487ca	318	static void
idinor	0:dcf3c92487ca	319	fsm_timeout(void *arg)
idinor	0:dcf3c92487ca	320	{
idinor	0:dcf3c92487ca	321	fsm f = (fsm ) arg;
idinor	0:dcf3c92487ca	322
idinor	0:dcf3c92487ca	323	switch (f->state) {
idinor	0:dcf3c92487ca	324	case LS_CLOSING:
idinor	0:dcf3c92487ca	325	case LS_STOPPING:
idinor	0:dcf3c92487ca	326	if( f->retransmits <= 0 ) {
idinor	0:dcf3c92487ca	327	FSMDEBUG(LOG_WARNING, ("%s: timeout sending Terminate-Request state=%d (%s)\n",
idinor	0:dcf3c92487ca	328	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	329	/*
idinor	0:dcf3c92487ca	330	* We've waited for an ack long enough. Peer probably heard us.
idinor	0:dcf3c92487ca	331	*/
idinor	0:dcf3c92487ca	332	f->state = (f->state == LS_CLOSING)? LS_CLOSED: LS_STOPPED;
idinor	0:dcf3c92487ca	333	if( f->callbacks->finished ) {
idinor	0:dcf3c92487ca	334	(*f->callbacks->finished)(f);
idinor	0:dcf3c92487ca	335	}
idinor	0:dcf3c92487ca	336	} else {
idinor	0:dcf3c92487ca	337	FSMDEBUG(LOG_WARNING, ("%s: timeout resending Terminate-Requests state=%d (%s)\n",
idinor	0:dcf3c92487ca	338	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	339	/* Send Terminate-Request */
idinor	0:dcf3c92487ca	340	fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
idinor	0:dcf3c92487ca	341	(u_char *) f->term_reason, f->term_reason_len);
idinor	0:dcf3c92487ca	342	TIMEOUT(fsm_timeout, f, f->timeouttime);
idinor	0:dcf3c92487ca	343	--f->retransmits;
idinor	0:dcf3c92487ca	344	}
idinor	0:dcf3c92487ca	345	break;
idinor	0:dcf3c92487ca	346
idinor	0:dcf3c92487ca	347	case LS_REQSENT:
idinor	0:dcf3c92487ca	348	case LS_ACKRCVD:
idinor	0:dcf3c92487ca	349	case LS_ACKSENT:
idinor	0:dcf3c92487ca	350	if (f->retransmits <= 0) {
idinor	0:dcf3c92487ca	351	FSMDEBUG(LOG_WARNING, ("%s: timeout sending Config-Requests state=%d (%s)\n",
idinor	0:dcf3c92487ca	352	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	353	f->state = LS_STOPPED;
idinor	0:dcf3c92487ca	354	if( (f->flags & OPT_PASSIVE) == 0 && f->callbacks->finished ) {
idinor	0:dcf3c92487ca	355	(*f->callbacks->finished)(f);
idinor	0:dcf3c92487ca	356	}
idinor	0:dcf3c92487ca	357	} else {
idinor	0:dcf3c92487ca	358	FSMDEBUG(LOG_WARNING, ("%s: timeout resending Config-Request state=%d (%s)\n",
idinor	0:dcf3c92487ca	359	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	360	/* Retransmit the configure-request */
idinor	0:dcf3c92487ca	361	if (f->callbacks->retransmit) {
idinor	0:dcf3c92487ca	362	(*f->callbacks->retransmit)(f);
idinor	0:dcf3c92487ca	363	}
idinor	0:dcf3c92487ca	364	fsm_sconfreq(f, 1); /* Re-send Configure-Request */
idinor	0:dcf3c92487ca	365	if( f->state == LS_ACKRCVD ) {
idinor	0:dcf3c92487ca	366	f->state = LS_REQSENT;
idinor	0:dcf3c92487ca	367	}
idinor	0:dcf3c92487ca	368	}
idinor	0:dcf3c92487ca	369	break;
idinor	0:dcf3c92487ca	370
idinor	0:dcf3c92487ca	371	default:
idinor	0:dcf3c92487ca	372	FSMDEBUG(LOG_INFO, ("%s: UNHANDLED timeout event in state %d (%s)!\n",
idinor	0:dcf3c92487ca	373	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	374	}
idinor	0:dcf3c92487ca	375	}
idinor	0:dcf3c92487ca	376
idinor	0:dcf3c92487ca	377
idinor	0:dcf3c92487ca	378	/*
idinor	0:dcf3c92487ca	379	* fsm_input - Input packet.
idinor	0:dcf3c92487ca	380	*/
idinor	0:dcf3c92487ca	381	void
idinor	0:dcf3c92487ca	382	fsm_input(fsm f, u_char inpacket, int l)
idinor	0:dcf3c92487ca	383	{
idinor	0:dcf3c92487ca	384	u_char *inp = inpacket;
idinor	0:dcf3c92487ca	385	u_char code, id;
idinor	0:dcf3c92487ca	386	int len;
idinor	0:dcf3c92487ca	387
idinor	0:dcf3c92487ca	388	/*
idinor	0:dcf3c92487ca	389	* Parse header (code, id and length).
idinor	0:dcf3c92487ca	390	* If packet too short, drop it.
idinor	0:dcf3c92487ca	391	*/
idinor	0:dcf3c92487ca	392	if (l < HEADERLEN) {
idinor	0:dcf3c92487ca	393	FSMDEBUG(LOG_WARNING, ("fsm_input(%x): Rcvd short header.\n",
idinor	0:dcf3c92487ca	394	f->protocol));
idinor	0:dcf3c92487ca	395	return;
idinor	0:dcf3c92487ca	396	}
idinor	0:dcf3c92487ca	397	GETCHAR(code, inp);
idinor	0:dcf3c92487ca	398	GETCHAR(id, inp);
idinor	0:dcf3c92487ca	399	GETSHORT(len, inp);
idinor	0:dcf3c92487ca	400	if (len < HEADERLEN) {
idinor	0:dcf3c92487ca	401	FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd illegal length.\n",
idinor	0:dcf3c92487ca	402	f->protocol));
idinor	0:dcf3c92487ca	403	return;
idinor	0:dcf3c92487ca	404	}
idinor	0:dcf3c92487ca	405	if (len > l) {
idinor	0:dcf3c92487ca	406	FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd short packet.\n",
idinor	0:dcf3c92487ca	407	f->protocol));
idinor	0:dcf3c92487ca	408	return;
idinor	0:dcf3c92487ca	409	}
idinor	0:dcf3c92487ca	410	len -= HEADERLEN; /* subtract header length */
idinor	0:dcf3c92487ca	411
idinor	0:dcf3c92487ca	412	if( f->state == LS_INITIAL \|\| f->state == LS_STARTING ) {
idinor	0:dcf3c92487ca	413	FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd packet in state %d (%s).\n",
idinor	0:dcf3c92487ca	414	f->protocol, f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	415	return;
idinor	0:dcf3c92487ca	416	}
idinor	0:dcf3c92487ca	417	FSMDEBUG(LOG_INFO, ("fsm_input(%s):%d,%d,%d\n", PROTO_NAME(f), code, id, l));
idinor	0:dcf3c92487ca	418	/*
idinor	0:dcf3c92487ca	419	* Action depends on code.
idinor	0:dcf3c92487ca	420	*/
idinor	0:dcf3c92487ca	421	switch (code) {
idinor	0:dcf3c92487ca	422	case CONFREQ:
idinor	0:dcf3c92487ca	423	fsm_rconfreq(f, id, inp, len);
idinor	0:dcf3c92487ca	424	break;
idinor	0:dcf3c92487ca	425
idinor	0:dcf3c92487ca	426	case CONFACK:
idinor	0:dcf3c92487ca	427	fsm_rconfack(f, id, inp, len);
idinor	0:dcf3c92487ca	428	break;
idinor	0:dcf3c92487ca	429
idinor	0:dcf3c92487ca	430	case CONFNAK:
idinor	0:dcf3c92487ca	431	case CONFREJ:
idinor	0:dcf3c92487ca	432	fsm_rconfnakrej(f, code, id, inp, len);
idinor	0:dcf3c92487ca	433	break;
idinor	0:dcf3c92487ca	434
idinor	0:dcf3c92487ca	435	case TERMREQ:
idinor	0:dcf3c92487ca	436	fsm_rtermreq(f, id, inp, len);
idinor	0:dcf3c92487ca	437	break;
idinor	0:dcf3c92487ca	438
idinor	0:dcf3c92487ca	439	case TERMACK:
idinor	0:dcf3c92487ca	440	fsm_rtermack(f);
idinor	0:dcf3c92487ca	441	break;
idinor	0:dcf3c92487ca	442
idinor	0:dcf3c92487ca	443	case CODEREJ:
idinor	0:dcf3c92487ca	444	fsm_rcoderej(f, inp, len);
idinor	0:dcf3c92487ca	445	break;
idinor	0:dcf3c92487ca	446
idinor	0:dcf3c92487ca	447	default:
idinor	0:dcf3c92487ca	448	FSMDEBUG(LOG_INFO, ("fsm_input(%s): default: \n", PROTO_NAME(f)));
idinor	0:dcf3c92487ca	449	if( !f->callbacks->extcode \|\|
idinor	0:dcf3c92487ca	450	!(*f->callbacks->extcode)(f, code, id, inp, len) ) {
idinor	0:dcf3c92487ca	451	fsm_sdata(f, CODEREJ, ++f->id, inpacket, len + HEADERLEN);
idinor	0:dcf3c92487ca	452	}
idinor	0:dcf3c92487ca	453	break;
idinor	0:dcf3c92487ca	454	}
idinor	0:dcf3c92487ca	455	}
idinor	0:dcf3c92487ca	456
idinor	0:dcf3c92487ca	457
idinor	0:dcf3c92487ca	458	/*
idinor	0:dcf3c92487ca	459	* fsm_rconfreq - Receive Configure-Request.
idinor	0:dcf3c92487ca	460	*/
idinor	0:dcf3c92487ca	461	static void
idinor	0:dcf3c92487ca	462	fsm_rconfreq(fsm f, u_char id, u_char inp, int len)
idinor	0:dcf3c92487ca	463	{
idinor	0:dcf3c92487ca	464	int code, reject_if_disagree;
idinor	0:dcf3c92487ca	465
idinor	0:dcf3c92487ca	466	FSMDEBUG(LOG_INFO, ("fsm_rconfreq(%s): Rcvd id %d state=%d (%s)\n",
idinor	0:dcf3c92487ca	467	PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	468	switch( f->state ) {
idinor	0:dcf3c92487ca	469	case LS_CLOSED:
idinor	0:dcf3c92487ca	470	/* Go away, we're closed */
idinor	0:dcf3c92487ca	471	fsm_sdata(f, TERMACK, id, NULL, 0);
idinor	0:dcf3c92487ca	472	return;
idinor	0:dcf3c92487ca	473	case LS_CLOSING:
idinor	0:dcf3c92487ca	474	case LS_STOPPING:
idinor	0:dcf3c92487ca	475	return;
idinor	0:dcf3c92487ca	476
idinor	0:dcf3c92487ca	477	case LS_OPENED:
idinor	0:dcf3c92487ca	478	/* Go down and restart negotiation */
idinor	0:dcf3c92487ca	479	if( f->callbacks->down ) {
idinor	0:dcf3c92487ca	480	(f->callbacks->down)(f); / Inform upper layers */
idinor	0:dcf3c92487ca	481	}
idinor	0:dcf3c92487ca	482	fsm_sconfreq(f, 0); /* Send initial Configure-Request */
idinor	0:dcf3c92487ca	483	break;
idinor	0:dcf3c92487ca	484
idinor	0:dcf3c92487ca	485	case LS_STOPPED:
idinor	0:dcf3c92487ca	486	/* Negotiation started by our peer */
idinor	0:dcf3c92487ca	487	fsm_sconfreq(f, 0); /* Send initial Configure-Request */
idinor	0:dcf3c92487ca	488	f->state = LS_REQSENT;
idinor	0:dcf3c92487ca	489	break;
idinor	0:dcf3c92487ca	490	}
idinor	0:dcf3c92487ca	491
idinor	0:dcf3c92487ca	492	/*
idinor	0:dcf3c92487ca	493	* Pass the requested configuration options
idinor	0:dcf3c92487ca	494	* to protocol-specific code for checking.
idinor	0:dcf3c92487ca	495	*/
idinor	0:dcf3c92487ca	496	if (f->callbacks->reqci) { /* Check CI */
idinor	0:dcf3c92487ca	497	reject_if_disagree = (f->nakloops >= f->maxnakloops);
idinor	0:dcf3c92487ca	498	code = (*f->callbacks->reqci)(f, inp, &len, reject_if_disagree);
idinor	0:dcf3c92487ca	499	} else if (len) {
idinor	0:dcf3c92487ca	500	code = CONFREJ; /* Reject all CI */
idinor	0:dcf3c92487ca	501	} else {
idinor	0:dcf3c92487ca	502	code = CONFACK;
idinor	0:dcf3c92487ca	503	}
idinor	0:dcf3c92487ca	504
idinor	0:dcf3c92487ca	505	/* send the Ack, Nak or Rej to the peer */
idinor	0:dcf3c92487ca	506	fsm_sdata(f, (u_char)code, id, inp, len);
idinor	0:dcf3c92487ca	507
idinor	0:dcf3c92487ca	508	if (code == CONFACK) {
idinor	0:dcf3c92487ca	509	if (f->state == LS_ACKRCVD) {
idinor	0:dcf3c92487ca	510	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
idinor	0:dcf3c92487ca	511	f->state = LS_OPENED;
idinor	0:dcf3c92487ca	512	if (f->callbacks->up) {
idinor	0:dcf3c92487ca	513	(f->callbacks->up)(f); / Inform upper layers */
idinor	0:dcf3c92487ca	514	}
idinor	0:dcf3c92487ca	515	} else {
idinor	0:dcf3c92487ca	516	f->state = LS_ACKSENT;
idinor	0:dcf3c92487ca	517	}
idinor	0:dcf3c92487ca	518	f->nakloops = 0;
idinor	0:dcf3c92487ca	519	} else {
idinor	0:dcf3c92487ca	520	/* we sent CONFACK or CONFREJ */
idinor	0:dcf3c92487ca	521	if (f->state != LS_ACKRCVD) {
idinor	0:dcf3c92487ca	522	f->state = LS_REQSENT;
idinor	0:dcf3c92487ca	523	}
idinor	0:dcf3c92487ca	524	if( code == CONFNAK ) {
idinor	0:dcf3c92487ca	525	++f->nakloops;
idinor	0:dcf3c92487ca	526	}
idinor	0:dcf3c92487ca	527	}
idinor	0:dcf3c92487ca	528	}
idinor	0:dcf3c92487ca	529
idinor	0:dcf3c92487ca	530
idinor	0:dcf3c92487ca	531	/*
idinor	0:dcf3c92487ca	532	* fsm_rconfack - Receive Configure-Ack.
idinor	0:dcf3c92487ca	533	*/
idinor	0:dcf3c92487ca	534	static void
idinor	0:dcf3c92487ca	535	fsm_rconfack(fsm f, int id, u_char inp, int len)
idinor	0:dcf3c92487ca	536	{
idinor	0:dcf3c92487ca	537	FSMDEBUG(LOG_INFO, ("fsm_rconfack(%s): Rcvd id %d state=%d (%s)\n",
idinor	0:dcf3c92487ca	538	PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	539
idinor	0:dcf3c92487ca	540	if (id != f->reqid \|\| f->seen_ack) { /* Expected id? */
idinor	0:dcf3c92487ca	541	return; /* Nope, toss... */
idinor	0:dcf3c92487ca	542	}
idinor	0:dcf3c92487ca	543	if( !(f->callbacks->ackci? (*f->callbacks->ackci)(f, inp, len): (len == 0)) ) {
idinor	0:dcf3c92487ca	544	/* Ack is bad - ignore it */
idinor	0:dcf3c92487ca	545	FSMDEBUG(LOG_INFO, ("%s: received bad Ack (length %d)\n",
idinor	0:dcf3c92487ca	546	PROTO_NAME(f), len));
idinor	0:dcf3c92487ca	547	return;
idinor	0:dcf3c92487ca	548	}
idinor	0:dcf3c92487ca	549	f->seen_ack = 1;
idinor	0:dcf3c92487ca	550
idinor	0:dcf3c92487ca	551	switch (f->state) {
idinor	0:dcf3c92487ca	552	case LS_CLOSED:
idinor	0:dcf3c92487ca	553	case LS_STOPPED:
idinor	0:dcf3c92487ca	554	fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
idinor	0:dcf3c92487ca	555	break;
idinor	0:dcf3c92487ca	556
idinor	0:dcf3c92487ca	557	case LS_REQSENT:
idinor	0:dcf3c92487ca	558	f->state = LS_ACKRCVD;
idinor	0:dcf3c92487ca	559	f->retransmits = f->maxconfreqtransmits;
idinor	0:dcf3c92487ca	560	break;
idinor	0:dcf3c92487ca	561
idinor	0:dcf3c92487ca	562	case LS_ACKRCVD:
idinor	0:dcf3c92487ca	563	/* Huh? an extra valid Ack? oh well... */
idinor	0:dcf3c92487ca	564	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
idinor	0:dcf3c92487ca	565	fsm_sconfreq(f, 0);
idinor	0:dcf3c92487ca	566	f->state = LS_REQSENT;
idinor	0:dcf3c92487ca	567	break;
idinor	0:dcf3c92487ca	568
idinor	0:dcf3c92487ca	569	case LS_ACKSENT:
idinor	0:dcf3c92487ca	570	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
idinor	0:dcf3c92487ca	571	f->state = LS_OPENED;
idinor	0:dcf3c92487ca	572	f->retransmits = f->maxconfreqtransmits;
idinor	0:dcf3c92487ca	573	if (f->callbacks->up) {
idinor	0:dcf3c92487ca	574	(f->callbacks->up)(f); / Inform upper layers */
idinor	0:dcf3c92487ca	575	}
idinor	0:dcf3c92487ca	576	break;
idinor	0:dcf3c92487ca	577
idinor	0:dcf3c92487ca	578	case LS_OPENED:
idinor	0:dcf3c92487ca	579	/* Go down and restart negotiation */
idinor	0:dcf3c92487ca	580	if (f->callbacks->down) {
idinor	0:dcf3c92487ca	581	(f->callbacks->down)(f); / Inform upper layers */
idinor	0:dcf3c92487ca	582	}
idinor	0:dcf3c92487ca	583	fsm_sconfreq(f, 0); /* Send initial Configure-Request */
idinor	0:dcf3c92487ca	584	f->state = LS_REQSENT;
idinor	0:dcf3c92487ca	585	break;
idinor	0:dcf3c92487ca	586	}
idinor	0:dcf3c92487ca	587	}
idinor	0:dcf3c92487ca	588
idinor	0:dcf3c92487ca	589
idinor	0:dcf3c92487ca	590	/*
idinor	0:dcf3c92487ca	591	* fsm_rconfnakrej - Receive Configure-Nak or Configure-Reject.
idinor	0:dcf3c92487ca	592	*/
idinor	0:dcf3c92487ca	593	static void
idinor	0:dcf3c92487ca	594	fsm_rconfnakrej(fsm f, int code, int id, u_char inp, int len)
idinor	0:dcf3c92487ca	595	{
idinor	0:dcf3c92487ca	596	int (proc) (fsm , u_char *, int);
idinor	0:dcf3c92487ca	597	int ret;
idinor	0:dcf3c92487ca	598
idinor	0:dcf3c92487ca	599	FSMDEBUG(LOG_INFO, ("fsm_rconfnakrej(%s): Rcvd id %d state=%d (%s)\n",
idinor	0:dcf3c92487ca	600	PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	601
idinor	0:dcf3c92487ca	602	if (id != f->reqid \|\| f->seen_ack) { /* Expected id? */
idinor	0:dcf3c92487ca	603	return; /* Nope, toss... */
idinor	0:dcf3c92487ca	604	}
idinor	0:dcf3c92487ca	605	proc = (code == CONFNAK)? f->callbacks->nakci: f->callbacks->rejci;
idinor	0:dcf3c92487ca	606	if (!proc \|\| !((ret = proc(f, inp, len)))) {
idinor	0:dcf3c92487ca	607	/* Nak/reject is bad - ignore it */
idinor	0:dcf3c92487ca	608	FSMDEBUG(LOG_INFO, ("%s: received bad %s (length %d)\n",
idinor	0:dcf3c92487ca	609	PROTO_NAME(f), (code==CONFNAK? "Nak": "reject"), len));
idinor	0:dcf3c92487ca	610	return;
idinor	0:dcf3c92487ca	611	}
idinor	0:dcf3c92487ca	612	f->seen_ack = 1;
idinor	0:dcf3c92487ca	613
idinor	0:dcf3c92487ca	614	switch (f->state) {
idinor	0:dcf3c92487ca	615	case LS_CLOSED:
idinor	0:dcf3c92487ca	616	case LS_STOPPED:
idinor	0:dcf3c92487ca	617	fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
idinor	0:dcf3c92487ca	618	break;
idinor	0:dcf3c92487ca	619
idinor	0:dcf3c92487ca	620	case LS_REQSENT:
idinor	0:dcf3c92487ca	621	case LS_ACKSENT:
idinor	0:dcf3c92487ca	622	/* They didn't agree to what we wanted - try another request */
idinor	0:dcf3c92487ca	623	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
idinor	0:dcf3c92487ca	624	if (ret < 0) {
idinor	0:dcf3c92487ca	625	f->state = LS_STOPPED; /* kludge for stopping CCP */
idinor	0:dcf3c92487ca	626	} else {
idinor	0:dcf3c92487ca	627	fsm_sconfreq(f, 0); /* Send Configure-Request */
idinor	0:dcf3c92487ca	628	}
idinor	0:dcf3c92487ca	629	break;
idinor	0:dcf3c92487ca	630
idinor	0:dcf3c92487ca	631	case LS_ACKRCVD:
idinor	0:dcf3c92487ca	632	/* Got a Nak/reject when we had already had an Ack?? oh well... */
idinor	0:dcf3c92487ca	633	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
idinor	0:dcf3c92487ca	634	fsm_sconfreq(f, 0);
idinor	0:dcf3c92487ca	635	f->state = LS_REQSENT;
idinor	0:dcf3c92487ca	636	break;
idinor	0:dcf3c92487ca	637
idinor	0:dcf3c92487ca	638	case LS_OPENED:
idinor	0:dcf3c92487ca	639	/* Go down and restart negotiation */
idinor	0:dcf3c92487ca	640	if (f->callbacks->down) {
idinor	0:dcf3c92487ca	641	(f->callbacks->down)(f); / Inform upper layers */
idinor	0:dcf3c92487ca	642	}
idinor	0:dcf3c92487ca	643	fsm_sconfreq(f, 0); /* Send initial Configure-Request */
idinor	0:dcf3c92487ca	644	f->state = LS_REQSENT;
idinor	0:dcf3c92487ca	645	break;
idinor	0:dcf3c92487ca	646	}
idinor	0:dcf3c92487ca	647	}
idinor	0:dcf3c92487ca	648
idinor	0:dcf3c92487ca	649
idinor	0:dcf3c92487ca	650	/*
idinor	0:dcf3c92487ca	651	* fsm_rtermreq - Receive Terminate-Req.
idinor	0:dcf3c92487ca	652	*/
idinor	0:dcf3c92487ca	653	static void
idinor	0:dcf3c92487ca	654	fsm_rtermreq(fsm f, int id, u_char p, int len)
idinor	0:dcf3c92487ca	655	{
idinor	0:dcf3c92487ca	656	LWIP_UNUSED_ARG(p);
idinor	0:dcf3c92487ca	657
idinor	0:dcf3c92487ca	658	FSMDEBUG(LOG_INFO, ("fsm_rtermreq(%s): Rcvd id %d state=%d (%s)\n",
idinor	0:dcf3c92487ca	659	PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	660
idinor	0:dcf3c92487ca	661	switch (f->state) {
idinor	0:dcf3c92487ca	662	case LS_ACKRCVD:
idinor	0:dcf3c92487ca	663	case LS_ACKSENT:
idinor	0:dcf3c92487ca	664	f->state = LS_REQSENT; /* Start over but keep trying */
idinor	0:dcf3c92487ca	665	break;
idinor	0:dcf3c92487ca	666
idinor	0:dcf3c92487ca	667	case LS_OPENED:
idinor	0:dcf3c92487ca	668	if (len > 0) {
idinor	0:dcf3c92487ca	669	FSMDEBUG(LOG_INFO, ("%s terminated by peer (%p)\n", PROTO_NAME(f), p));
idinor	0:dcf3c92487ca	670	} else {
idinor	0:dcf3c92487ca	671	FSMDEBUG(LOG_INFO, ("%s terminated by peer\n", PROTO_NAME(f)));
idinor	0:dcf3c92487ca	672	}
idinor	0:dcf3c92487ca	673	if (f->callbacks->down) {
idinor	0:dcf3c92487ca	674	(f->callbacks->down)(f); / Inform upper layers */
idinor	0:dcf3c92487ca	675	}
idinor	0:dcf3c92487ca	676	f->retransmits = 0;
idinor	0:dcf3c92487ca	677	f->state = LS_STOPPING;
idinor	0:dcf3c92487ca	678	TIMEOUT(fsm_timeout, f, f->timeouttime);
idinor	0:dcf3c92487ca	679	break;
idinor	0:dcf3c92487ca	680	}
idinor	0:dcf3c92487ca	681
idinor	0:dcf3c92487ca	682	fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
idinor	0:dcf3c92487ca	683	}
idinor	0:dcf3c92487ca	684
idinor	0:dcf3c92487ca	685
idinor	0:dcf3c92487ca	686	/*
idinor	0:dcf3c92487ca	687	* fsm_rtermack - Receive Terminate-Ack.
idinor	0:dcf3c92487ca	688	*/
idinor	0:dcf3c92487ca	689	static void
idinor	0:dcf3c92487ca	690	fsm_rtermack(fsm *f)
idinor	0:dcf3c92487ca	691	{
idinor	0:dcf3c92487ca	692	FSMDEBUG(LOG_INFO, ("fsm_rtermack(%s): state=%d (%s)\n",
idinor	0:dcf3c92487ca	693	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	694
idinor	0:dcf3c92487ca	695	switch (f->state) {
idinor	0:dcf3c92487ca	696	case LS_CLOSING:
idinor	0:dcf3c92487ca	697	UNTIMEOUT(fsm_timeout, f);
idinor	0:dcf3c92487ca	698	f->state = LS_CLOSED;
idinor	0:dcf3c92487ca	699	if( f->callbacks->finished ) {
idinor	0:dcf3c92487ca	700	(*f->callbacks->finished)(f);
idinor	0:dcf3c92487ca	701	}
idinor	0:dcf3c92487ca	702	break;
idinor	0:dcf3c92487ca	703
idinor	0:dcf3c92487ca	704	case LS_STOPPING:
idinor	0:dcf3c92487ca	705	UNTIMEOUT(fsm_timeout, f);
idinor	0:dcf3c92487ca	706	f->state = LS_STOPPED;
idinor	0:dcf3c92487ca	707	if( f->callbacks->finished ) {
idinor	0:dcf3c92487ca	708	(*f->callbacks->finished)(f);
idinor	0:dcf3c92487ca	709	}
idinor	0:dcf3c92487ca	710	break;
idinor	0:dcf3c92487ca	711
idinor	0:dcf3c92487ca	712	case LS_ACKRCVD:
idinor	0:dcf3c92487ca	713	f->state = LS_REQSENT;
idinor	0:dcf3c92487ca	714	break;
idinor	0:dcf3c92487ca	715
idinor	0:dcf3c92487ca	716	case LS_OPENED:
idinor	0:dcf3c92487ca	717	if (f->callbacks->down) {
idinor	0:dcf3c92487ca	718	(f->callbacks->down)(f); / Inform upper layers */
idinor	0:dcf3c92487ca	719	}
idinor	0:dcf3c92487ca	720	fsm_sconfreq(f, 0);
idinor	0:dcf3c92487ca	721	break;
idinor	0:dcf3c92487ca	722	default:
idinor	0:dcf3c92487ca	723	FSMDEBUG(LOG_INFO, ("fsm_rtermack(%s): UNHANDLED state=%d (%s)!!!\n",
idinor	0:dcf3c92487ca	724	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	725	}
idinor	0:dcf3c92487ca	726	}
idinor	0:dcf3c92487ca	727
idinor	0:dcf3c92487ca	728
idinor	0:dcf3c92487ca	729	/*
idinor	0:dcf3c92487ca	730	* fsm_rcoderej - Receive an Code-Reject.
idinor	0:dcf3c92487ca	731	*/
idinor	0:dcf3c92487ca	732	static void
idinor	0:dcf3c92487ca	733	fsm_rcoderej(fsm f, u_char inp, int len)
idinor	0:dcf3c92487ca	734	{
idinor	0:dcf3c92487ca	735	u_char code, id;
idinor	0:dcf3c92487ca	736
idinor	0:dcf3c92487ca	737	FSMDEBUG(LOG_INFO, ("fsm_rcoderej(%s): state=%d (%s)\n",
idinor	0:dcf3c92487ca	738	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	739
idinor	0:dcf3c92487ca	740	if (len < HEADERLEN) {
idinor	0:dcf3c92487ca	741	FSMDEBUG(LOG_INFO, ("fsm_rcoderej: Rcvd short Code-Reject packet!\n"));
idinor	0:dcf3c92487ca	742	return;
idinor	0:dcf3c92487ca	743	}
idinor	0:dcf3c92487ca	744	GETCHAR(code, inp);
idinor	0:dcf3c92487ca	745	GETCHAR(id, inp);
idinor	0:dcf3c92487ca	746	FSMDEBUG(LOG_WARNING, ("%s: Rcvd Code-Reject for code %d, id %d\n",
idinor	0:dcf3c92487ca	747	PROTO_NAME(f), code, id));
idinor	0:dcf3c92487ca	748
idinor	0:dcf3c92487ca	749	if( f->state == LS_ACKRCVD ) {
idinor	0:dcf3c92487ca	750	f->state = LS_REQSENT;
idinor	0:dcf3c92487ca	751	}
idinor	0:dcf3c92487ca	752	}
idinor	0:dcf3c92487ca	753
idinor	0:dcf3c92487ca	754
idinor	0:dcf3c92487ca	755	/*
idinor	0:dcf3c92487ca	756	* fsm_protreject - Peer doesn't speak this protocol.
idinor	0:dcf3c92487ca	757	*
idinor	0:dcf3c92487ca	758	* Treat this as a catastrophic error (RXJ-).
idinor	0:dcf3c92487ca	759	*/
idinor	0:dcf3c92487ca	760	void
idinor	0:dcf3c92487ca	761	fsm_protreject(fsm *f)
idinor	0:dcf3c92487ca	762	{
idinor	0:dcf3c92487ca	763	switch( f->state ) {
idinor	0:dcf3c92487ca	764	case LS_CLOSING:
idinor	0:dcf3c92487ca	765	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
idinor	0:dcf3c92487ca	766	/* fall through */
idinor	0:dcf3c92487ca	767	case LS_CLOSED:
idinor	0:dcf3c92487ca	768	f->state = LS_CLOSED;
idinor	0:dcf3c92487ca	769	if( f->callbacks->finished ) {
idinor	0:dcf3c92487ca	770	(*f->callbacks->finished)(f);
idinor	0:dcf3c92487ca	771	}
idinor	0:dcf3c92487ca	772	break;
idinor	0:dcf3c92487ca	773
idinor	0:dcf3c92487ca	774	case LS_STOPPING:
idinor	0:dcf3c92487ca	775	case LS_REQSENT:
idinor	0:dcf3c92487ca	776	case LS_ACKRCVD:
idinor	0:dcf3c92487ca	777	case LS_ACKSENT:
idinor	0:dcf3c92487ca	778	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
idinor	0:dcf3c92487ca	779	/* fall through */
idinor	0:dcf3c92487ca	780	case LS_STOPPED:
idinor	0:dcf3c92487ca	781	f->state = LS_STOPPED;
idinor	0:dcf3c92487ca	782	if( f->callbacks->finished ) {
idinor	0:dcf3c92487ca	783	(*f->callbacks->finished)(f);
idinor	0:dcf3c92487ca	784	}
idinor	0:dcf3c92487ca	785	break;
idinor	0:dcf3c92487ca	786
idinor	0:dcf3c92487ca	787	case LS_OPENED:
idinor	0:dcf3c92487ca	788	if( f->callbacks->down ) {
idinor	0:dcf3c92487ca	789	(*f->callbacks->down)(f);
idinor	0:dcf3c92487ca	790	}
idinor	0:dcf3c92487ca	791	/* Init restart counter, send Terminate-Request */
idinor	0:dcf3c92487ca	792	f->retransmits = f->maxtermtransmits;
idinor	0:dcf3c92487ca	793	fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
idinor	0:dcf3c92487ca	794	(u_char *) f->term_reason, f->term_reason_len);
idinor	0:dcf3c92487ca	795	TIMEOUT(fsm_timeout, f, f->timeouttime);
idinor	0:dcf3c92487ca	796	--f->retransmits;
idinor	0:dcf3c92487ca	797
idinor	0:dcf3c92487ca	798	f->state = LS_STOPPING;
idinor	0:dcf3c92487ca	799	break;
idinor	0:dcf3c92487ca	800
idinor	0:dcf3c92487ca	801	default:
idinor	0:dcf3c92487ca	802	FSMDEBUG(LOG_INFO, ("%s: Protocol-reject event in state %d (%s)!\n",
idinor	0:dcf3c92487ca	803	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
idinor	0:dcf3c92487ca	804	}
idinor	0:dcf3c92487ca	805	}
idinor	0:dcf3c92487ca	806
idinor	0:dcf3c92487ca	807
idinor	0:dcf3c92487ca	808	/*
idinor	0:dcf3c92487ca	809	* fsm_sconfreq - Send a Configure-Request.
idinor	0:dcf3c92487ca	810	*/
idinor	0:dcf3c92487ca	811	static void
idinor	0:dcf3c92487ca	812	fsm_sconfreq(fsm *f, int retransmit)
idinor	0:dcf3c92487ca	813	{
idinor	0:dcf3c92487ca	814	u_char *outp;
idinor	0:dcf3c92487ca	815	int cilen;
idinor	0:dcf3c92487ca	816
idinor	0:dcf3c92487ca	817	if( f->state != LS_REQSENT && f->state != LS_ACKRCVD && f->state != LS_ACKSENT ) {
idinor	0:dcf3c92487ca	818	/* Not currently negotiating - reset options */
idinor	0:dcf3c92487ca	819	if( f->callbacks->resetci ) {
idinor	0:dcf3c92487ca	820	(*f->callbacks->resetci)(f);
idinor	0:dcf3c92487ca	821	}
idinor	0:dcf3c92487ca	822	f->nakloops = 0;
idinor	0:dcf3c92487ca	823	}
idinor	0:dcf3c92487ca	824
idinor	0:dcf3c92487ca	825	if( !retransmit ) {
idinor	0:dcf3c92487ca	826	/* New request - reset retransmission counter, use new ID */
idinor	0:dcf3c92487ca	827	f->retransmits = f->maxconfreqtransmits;
idinor	0:dcf3c92487ca	828	f->reqid = ++f->id;
idinor	0:dcf3c92487ca	829	}
idinor	0:dcf3c92487ca	830
idinor	0:dcf3c92487ca	831	f->seen_ack = 0;
idinor	0:dcf3c92487ca	832
idinor	0:dcf3c92487ca	833	/*
idinor	0:dcf3c92487ca	834	* Make up the request packet
idinor	0:dcf3c92487ca	835	*/
idinor	0:dcf3c92487ca	836	outp = outpacket_buf[f->unit] + PPP_HDRLEN + HEADERLEN;
idinor	0:dcf3c92487ca	837	if( f->callbacks->cilen && f->callbacks->addci ) {
idinor	0:dcf3c92487ca	838	cilen = (*f->callbacks->cilen)(f);
idinor	0:dcf3c92487ca	839	if( cilen > peer_mru[f->unit] - (int)HEADERLEN ) {
idinor	0:dcf3c92487ca	840	cilen = peer_mru[f->unit] - HEADERLEN;
idinor	0:dcf3c92487ca	841	}
idinor	0:dcf3c92487ca	842	if (f->callbacks->addci) {
idinor	0:dcf3c92487ca	843	(*f->callbacks->addci)(f, outp, &cilen);
idinor	0:dcf3c92487ca	844	}
idinor	0:dcf3c92487ca	845	} else {
idinor	0:dcf3c92487ca	846	cilen = 0;
idinor	0:dcf3c92487ca	847	}
idinor	0:dcf3c92487ca	848
idinor	0:dcf3c92487ca	849	/* send the request to our peer */
idinor	0:dcf3c92487ca	850	fsm_sdata(f, CONFREQ, f->reqid, outp, cilen);
idinor	0:dcf3c92487ca	851
idinor	0:dcf3c92487ca	852	/* start the retransmit timer */
idinor	0:dcf3c92487ca	853	--f->retransmits;
idinor	0:dcf3c92487ca	854	TIMEOUT(fsm_timeout, f, f->timeouttime);
idinor	0:dcf3c92487ca	855
idinor	0:dcf3c92487ca	856	FSMDEBUG(LOG_INFO, ("%s: sending Configure-Request, id %d\n",
idinor	0:dcf3c92487ca	857	PROTO_NAME(f), f->reqid));
idinor	0:dcf3c92487ca	858	}
idinor	0:dcf3c92487ca	859
idinor	0:dcf3c92487ca	860
idinor	0:dcf3c92487ca	861	/*
idinor	0:dcf3c92487ca	862	* fsm_sdata - Send some data.
idinor	0:dcf3c92487ca	863	*
idinor	0:dcf3c92487ca	864	* Used for all packets sent to our peer by this module.
idinor	0:dcf3c92487ca	865	*/
idinor	0:dcf3c92487ca	866	void
idinor	0:dcf3c92487ca	867	fsm_sdata( fsm f, u_char code, u_char id, u_char data, int datalen)
idinor	0:dcf3c92487ca	868	{
idinor	0:dcf3c92487ca	869	u_char *outp;
idinor	0:dcf3c92487ca	870	int outlen;
idinor	0:dcf3c92487ca	871
idinor	0:dcf3c92487ca	872	/* Adjust length to be smaller than MTU */
idinor	0:dcf3c92487ca	873	outp = outpacket_buf[f->unit];
idinor	0:dcf3c92487ca	874	if (datalen > peer_mru[f->unit] - (int)HEADERLEN) {
idinor	0:dcf3c92487ca	875	datalen = peer_mru[f->unit] - HEADERLEN;
idinor	0:dcf3c92487ca	876	}
idinor	0:dcf3c92487ca	877	if (datalen && data != outp + PPP_HDRLEN + HEADERLEN) {
idinor	0:dcf3c92487ca	878	BCOPY(data, outp + PPP_HDRLEN + HEADERLEN, datalen);
idinor	0:dcf3c92487ca	879	}
idinor	0:dcf3c92487ca	880	outlen = datalen + HEADERLEN;
idinor	0:dcf3c92487ca	881	MAKEHEADER(outp, f->protocol);
idinor	0:dcf3c92487ca	882	PUTCHAR(code, outp);
idinor	0:dcf3c92487ca	883	PUTCHAR(id, outp);
idinor	0:dcf3c92487ca	884	PUTSHORT(outlen, outp);
idinor	0:dcf3c92487ca	885	pppWrite(f->unit, outpacket_buf[f->unit], outlen + PPP_HDRLEN);
idinor	0:dcf3c92487ca	886	FSMDEBUG(LOG_INFO, ("fsm_sdata(%s): Sent code %d,%d,%d.\n",
idinor	0:dcf3c92487ca	887	PROTO_NAME(f), code, id, outlen));
idinor	0:dcf3c92487ca	888	}
idinor	0:dcf3c92487ca	889
idinor	0:dcf3c92487ca	890	#endif /* PPP_SUPPORT */

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Type:	Library
Created:	20 Jul 2011
Imports:	35
Forks:	0
Commits:	1
Dependents:	1
Dependencies:	0
Followers:	1

lwip/netif/ppp/fsm.c@0:dcf3c92487ca, 2011-07-20 (annotated)

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