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NetTribute library with debug turned on in FShandler Donatien Garner -> Segundo Equipo -> this version

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

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

Who changed what in which revision?

User	Revision	Line number	New contents of line
hexley	0:281d6ff68967	1	/*****************************************************************************
hexley	0:281d6ff68967	2	* fsm.c - Network Control Protocol Finite State Machine program file.
hexley	0:281d6ff68967	3	*
hexley	0:281d6ff68967	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
hexley	0:281d6ff68967	5	* portions Copyright (c) 1997 by 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	* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
hexley	0:281d6ff68967	31	* Original based on BSD fsm.c.
hexley	0:281d6ff68967	32	*****************************************************************************/
hexley	0:281d6ff68967	33	/*
hexley	0:281d6ff68967	34	* fsm.c - {Link, IP} Control Protocol Finite State Machine.
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
hexley	0:281d6ff68967	52	/*
hexley	0:281d6ff68967	53	* TODO:
hexley	0:281d6ff68967	54	* Randomize fsm id on link/init.
hexley	0:281d6ff68967	55	* Deal with variable outgoing MTU.
hexley	0:281d6ff68967	56	*/
hexley	0:281d6ff68967	57
hexley	0:281d6ff68967	58	#include "lwip/opt.h"
hexley	0:281d6ff68967	59
hexley	0:281d6ff68967	60	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
hexley	0:281d6ff68967	61
hexley	0:281d6ff68967	62	#include "ppp.h"
hexley	0:281d6ff68967	63	#include "pppdebug.h"
hexley	0:281d6ff68967	64
hexley	0:281d6ff68967	65	#include "fsm.h"
hexley	0:281d6ff68967	66
hexley	0:281d6ff68967	67	#include <string.h>
hexley	0:281d6ff68967	68
hexley	0:281d6ff68967	69	#if PPP_DEBUG
hexley	0:281d6ff68967	70	static const char *ppperr_strerr[] = {
hexley	0:281d6ff68967	71	"LS_INITIAL", /* LS_INITIAL 0 */
hexley	0:281d6ff68967	72	"LS_STARTING", /* LS_STARTING 1 */
hexley	0:281d6ff68967	73	"LS_CLOSED", /* LS_CLOSED 2 */
hexley	0:281d6ff68967	74	"LS_STOPPED", /* LS_STOPPED 3 */
hexley	0:281d6ff68967	75	"LS_CLOSING", /* LS_CLOSING 4 */
hexley	0:281d6ff68967	76	"LS_STOPPING", /* LS_STOPPING 5 */
hexley	0:281d6ff68967	77	"LS_REQSENT", /* LS_REQSENT 6 */
hexley	0:281d6ff68967	78	"LS_ACKRCVD", /* LS_ACKRCVD 7 */
hexley	0:281d6ff68967	79	"LS_ACKSENT", /* LS_ACKSENT 8 */
hexley	0:281d6ff68967	80	"LS_OPENED" /* LS_OPENED 9 */
hexley	0:281d6ff68967	81	};
hexley	0:281d6ff68967	82	#endif /* PPP_DEBUG */
hexley	0:281d6ff68967	83
hexley	0:281d6ff68967	84	static void fsm_timeout (void *);
hexley	0:281d6ff68967	85	static void fsm_rconfreq (fsm , u_char, u_char , int);
hexley	0:281d6ff68967	86	static void fsm_rconfack (fsm , int, u_char , int);
hexley	0:281d6ff68967	87	static void fsm_rconfnakrej (fsm , int, int, u_char , int);
hexley	0:281d6ff68967	88	static void fsm_rtermreq (fsm , int, u_char , int);
hexley	0:281d6ff68967	89	static void fsm_rtermack (fsm *);
hexley	0:281d6ff68967	90	static void fsm_rcoderej (fsm , u_char , int);
hexley	0:281d6ff68967	91	static void fsm_sconfreq (fsm *, int);
hexley	0:281d6ff68967	92
hexley	0:281d6ff68967	93	#define PROTO_NAME(f) ((f)->callbacks->proto_name)
hexley	0:281d6ff68967	94
hexley	0:281d6ff68967	95	int peer_mru[NUM_PPP];
hexley	0:281d6ff68967	96
hexley	0:281d6ff68967	97
hexley	0:281d6ff68967	98	/*
hexley	0:281d6ff68967	99	* fsm_init - Initialize fsm.
hexley	0:281d6ff68967	100	*
hexley	0:281d6ff68967	101	* Initialize fsm state.
hexley	0:281d6ff68967	102	*/
hexley	0:281d6ff68967	103	void
hexley	0:281d6ff68967	104	fsm_init(fsm *f)
hexley	0:281d6ff68967	105	{
hexley	0:281d6ff68967	106	f->state = LS_INITIAL;
hexley	0:281d6ff68967	107	f->flags = 0;
hexley	0:281d6ff68967	108	f->id = 0; /* XXX Start with random id? */
hexley	0:281d6ff68967	109	f->timeouttime = FSM_DEFTIMEOUT;
hexley	0:281d6ff68967	110	f->maxconfreqtransmits = FSM_DEFMAXCONFREQS;
hexley	0:281d6ff68967	111	f->maxtermtransmits = FSM_DEFMAXTERMREQS;
hexley	0:281d6ff68967	112	f->maxnakloops = FSM_DEFMAXNAKLOOPS;
hexley	0:281d6ff68967	113	f->term_reason_len = 0;
hexley	0:281d6ff68967	114	}
hexley	0:281d6ff68967	115
hexley	0:281d6ff68967	116
hexley	0:281d6ff68967	117	/*
hexley	0:281d6ff68967	118	* fsm_lowerup - The lower layer is up.
hexley	0:281d6ff68967	119	*/
hexley	0:281d6ff68967	120	void
hexley	0:281d6ff68967	121	fsm_lowerup(fsm *f)
hexley	0:281d6ff68967	122	{
hexley	0:281d6ff68967	123	int oldState = f->state;
hexley	0:281d6ff68967	124
hexley	0:281d6ff68967	125	LWIP_UNUSED_ARG(oldState);
hexley	0:281d6ff68967	126
hexley	0:281d6ff68967	127	switch( f->state ) {
hexley	0:281d6ff68967	128	case LS_INITIAL:
hexley	0:281d6ff68967	129	f->state = LS_CLOSED;
hexley	0:281d6ff68967	130	break;
hexley	0:281d6ff68967	131
hexley	0:281d6ff68967	132	case LS_STARTING:
hexley	0:281d6ff68967	133	if( f->flags & OPT_SILENT ) {
hexley	0:281d6ff68967	134	f->state = LS_STOPPED;
hexley	0:281d6ff68967	135	} else {
hexley	0:281d6ff68967	136	/* Send an initial configure-request */
hexley	0:281d6ff68967	137	fsm_sconfreq(f, 0);
hexley	0:281d6ff68967	138	f->state = LS_REQSENT;
hexley	0:281d6ff68967	139	}
hexley	0:281d6ff68967	140	break;
hexley	0:281d6ff68967	141
hexley	0:281d6ff68967	142	default:
hexley	0:281d6ff68967	143	FSMDEBUG(LOG_INFO, ("%s: Up event in state %d (%s)!\n",
hexley	0:281d6ff68967	144	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	145	}
hexley	0:281d6ff68967	146
hexley	0:281d6ff68967	147	FSMDEBUG(LOG_INFO, ("%s: lowerup state %d (%s) -> %d (%s)\n",
hexley	0:281d6ff68967	148	PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	149	}
hexley	0:281d6ff68967	150
hexley	0:281d6ff68967	151
hexley	0:281d6ff68967	152	/*
hexley	0:281d6ff68967	153	* fsm_lowerdown - The lower layer is down.
hexley	0:281d6ff68967	154	*
hexley	0:281d6ff68967	155	* Cancel all timeouts and inform upper layers.
hexley	0:281d6ff68967	156	*/
hexley	0:281d6ff68967	157	void
hexley	0:281d6ff68967	158	fsm_lowerdown(fsm *f)
hexley	0:281d6ff68967	159	{
hexley	0:281d6ff68967	160	int oldState = f->state;
hexley	0:281d6ff68967	161
hexley	0:281d6ff68967	162	LWIP_UNUSED_ARG(oldState);
hexley	0:281d6ff68967	163
hexley	0:281d6ff68967	164	switch( f->state ) {
hexley	0:281d6ff68967	165	case LS_CLOSED:
hexley	0:281d6ff68967	166	f->state = LS_INITIAL;
hexley	0:281d6ff68967	167	break;
hexley	0:281d6ff68967	168
hexley	0:281d6ff68967	169	case LS_STOPPED:
hexley	0:281d6ff68967	170	f->state = LS_STARTING;
hexley	0:281d6ff68967	171	if( f->callbacks->starting ) {
hexley	0:281d6ff68967	172	(*f->callbacks->starting)(f);
hexley	0:281d6ff68967	173	}
hexley	0:281d6ff68967	174	break;
hexley	0:281d6ff68967	175
hexley	0:281d6ff68967	176	case LS_CLOSING:
hexley	0:281d6ff68967	177	f->state = LS_INITIAL;
hexley	0:281d6ff68967	178	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
hexley	0:281d6ff68967	179	break;
hexley	0:281d6ff68967	180
hexley	0:281d6ff68967	181	case LS_STOPPING:
hexley	0:281d6ff68967	182	case LS_REQSENT:
hexley	0:281d6ff68967	183	case LS_ACKRCVD:
hexley	0:281d6ff68967	184	case LS_ACKSENT:
hexley	0:281d6ff68967	185	f->state = LS_STARTING;
hexley	0:281d6ff68967	186	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
hexley	0:281d6ff68967	187	break;
hexley	0:281d6ff68967	188
hexley	0:281d6ff68967	189	case LS_OPENED:
hexley	0:281d6ff68967	190	if( f->callbacks->down ) {
hexley	0:281d6ff68967	191	(*f->callbacks->down)(f);
hexley	0:281d6ff68967	192	}
hexley	0:281d6ff68967	193	f->state = LS_STARTING;
hexley	0:281d6ff68967	194	break;
hexley	0:281d6ff68967	195
hexley	0:281d6ff68967	196	default:
hexley	0:281d6ff68967	197	FSMDEBUG(LOG_INFO, ("%s: Down event in state %d (%s)!\n",
hexley	0:281d6ff68967	198	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	199	}
hexley	0:281d6ff68967	200
hexley	0:281d6ff68967	201	FSMDEBUG(LOG_INFO, ("%s: lowerdown state %d (%s) -> %d (%s)\n",
hexley	0:281d6ff68967	202	PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	203	}
hexley	0:281d6ff68967	204
hexley	0:281d6ff68967	205
hexley	0:281d6ff68967	206	/*
hexley	0:281d6ff68967	207	* fsm_open - Link is allowed to come up.
hexley	0:281d6ff68967	208	*/
hexley	0:281d6ff68967	209	void
hexley	0:281d6ff68967	210	fsm_open(fsm *f)
hexley	0:281d6ff68967	211	{
hexley	0:281d6ff68967	212	int oldState = f->state;
hexley	0:281d6ff68967	213
hexley	0:281d6ff68967	214	LWIP_UNUSED_ARG(oldState);
hexley	0:281d6ff68967	215
hexley	0:281d6ff68967	216	switch( f->state ) {
hexley	0:281d6ff68967	217	case LS_INITIAL:
hexley	0:281d6ff68967	218	f->state = LS_STARTING;
hexley	0:281d6ff68967	219	if( f->callbacks->starting ) {
hexley	0:281d6ff68967	220	(*f->callbacks->starting)(f);
hexley	0:281d6ff68967	221	}
hexley	0:281d6ff68967	222	break;
hexley	0:281d6ff68967	223
hexley	0:281d6ff68967	224	case LS_CLOSED:
hexley	0:281d6ff68967	225	if( f->flags & OPT_SILENT ) {
hexley	0:281d6ff68967	226	f->state = LS_STOPPED;
hexley	0:281d6ff68967	227	} else {
hexley	0:281d6ff68967	228	/* Send an initial configure-request */
hexley	0:281d6ff68967	229	fsm_sconfreq(f, 0);
hexley	0:281d6ff68967	230	f->state = LS_REQSENT;
hexley	0:281d6ff68967	231	}
hexley	0:281d6ff68967	232	break;
hexley	0:281d6ff68967	233
hexley	0:281d6ff68967	234	case LS_CLOSING:
hexley	0:281d6ff68967	235	f->state = LS_STOPPING;
hexley	0:281d6ff68967	236	/* fall through */
hexley	0:281d6ff68967	237	case LS_STOPPED:
hexley	0:281d6ff68967	238	case LS_OPENED:
hexley	0:281d6ff68967	239	if( f->flags & OPT_RESTART ) {
hexley	0:281d6ff68967	240	fsm_lowerdown(f);
hexley	0:281d6ff68967	241	fsm_lowerup(f);
hexley	0:281d6ff68967	242	}
hexley	0:281d6ff68967	243	break;
hexley	0:281d6ff68967	244	}
hexley	0:281d6ff68967	245
hexley	0:281d6ff68967	246	FSMDEBUG(LOG_INFO, ("%s: open state %d (%s) -> %d (%s)\n",
hexley	0:281d6ff68967	247	PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	248	}
hexley	0:281d6ff68967	249
hexley	0:281d6ff68967	250	#if 0 /* backport pppd 2.4.4b1; */
hexley	0:281d6ff68967	251	/*
hexley	0:281d6ff68967	252	* terminate_layer - Start process of shutting down the FSM
hexley	0:281d6ff68967	253	*
hexley	0:281d6ff68967	254	* Cancel any timeout running, notify upper layers we're done, and
hexley	0:281d6ff68967	255	* send a terminate-request message as configured.
hexley	0:281d6ff68967	256	*/
hexley	0:281d6ff68967	257	static void
hexley	0:281d6ff68967	258	terminate_layer(fsm *f, int nextstate)
hexley	0:281d6ff68967	259	{
hexley	0:281d6ff68967	260	/* @todo */
hexley	0:281d6ff68967	261	}
hexley	0:281d6ff68967	262	#endif
hexley	0:281d6ff68967	263
hexley	0:281d6ff68967	264	/*
hexley	0:281d6ff68967	265	* fsm_close - Start closing connection.
hexley	0:281d6ff68967	266	*
hexley	0:281d6ff68967	267	* Cancel timeouts and either initiate close or possibly go directly to
hexley	0:281d6ff68967	268	* the LS_CLOSED state.
hexley	0:281d6ff68967	269	*/
hexley	0:281d6ff68967	270	void
hexley	0:281d6ff68967	271	fsm_close(fsm f, char reason)
hexley	0:281d6ff68967	272	{
hexley	0:281d6ff68967	273	int oldState = f->state;
hexley	0:281d6ff68967	274
hexley	0:281d6ff68967	275	LWIP_UNUSED_ARG(oldState);
hexley	0:281d6ff68967	276
hexley	0:281d6ff68967	277	f->term_reason = reason;
hexley	0:281d6ff68967	278	f->term_reason_len = (reason == NULL ? 0 : (int)strlen(reason));
hexley	0:281d6ff68967	279	switch( f->state ) {
hexley	0:281d6ff68967	280	case LS_STARTING:
hexley	0:281d6ff68967	281	f->state = LS_INITIAL;
hexley	0:281d6ff68967	282	break;
hexley	0:281d6ff68967	283	case LS_STOPPED:
hexley	0:281d6ff68967	284	f->state = LS_CLOSED;
hexley	0:281d6ff68967	285	break;
hexley	0:281d6ff68967	286	case LS_STOPPING:
hexley	0:281d6ff68967	287	f->state = LS_CLOSING;
hexley	0:281d6ff68967	288	break;
hexley	0:281d6ff68967	289
hexley	0:281d6ff68967	290	case LS_REQSENT:
hexley	0:281d6ff68967	291	case LS_ACKRCVD:
hexley	0:281d6ff68967	292	case LS_ACKSENT:
hexley	0:281d6ff68967	293	case LS_OPENED:
hexley	0:281d6ff68967	294	if( f->state != LS_OPENED ) {
hexley	0:281d6ff68967	295	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
hexley	0:281d6ff68967	296	} else if( f->callbacks->down ) {
hexley	0:281d6ff68967	297	(f->callbacks->down)(f); / Inform upper layers we're down */
hexley	0:281d6ff68967	298	}
hexley	0:281d6ff68967	299	/* Init restart counter, send Terminate-Request */
hexley	0:281d6ff68967	300	f->retransmits = f->maxtermtransmits;
hexley	0:281d6ff68967	301	fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
hexley	0:281d6ff68967	302	(u_char *) f->term_reason, f->term_reason_len);
hexley	0:281d6ff68967	303	TIMEOUT(fsm_timeout, f, f->timeouttime);
hexley	0:281d6ff68967	304	--f->retransmits;
hexley	0:281d6ff68967	305
hexley	0:281d6ff68967	306	f->state = LS_CLOSING;
hexley	0:281d6ff68967	307	break;
hexley	0:281d6ff68967	308	}
hexley	0:281d6ff68967	309
hexley	0:281d6ff68967	310	FSMDEBUG(LOG_INFO, ("%s: close reason=%s state %d (%s) -> %d (%s)\n",
hexley	0:281d6ff68967	311	PROTO_NAME(f), reason, oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	312	}
hexley	0:281d6ff68967	313
hexley	0:281d6ff68967	314
hexley	0:281d6ff68967	315	/*
hexley	0:281d6ff68967	316	* fsm_timeout - Timeout expired.
hexley	0:281d6ff68967	317	*/
hexley	0:281d6ff68967	318	static void
hexley	0:281d6ff68967	319	fsm_timeout(void *arg)
hexley	0:281d6ff68967	320	{
hexley	0:281d6ff68967	321	fsm f = (fsm ) arg;
hexley	0:281d6ff68967	322
hexley	0:281d6ff68967	323	switch (f->state) {
hexley	0:281d6ff68967	324	case LS_CLOSING:
hexley	0:281d6ff68967	325	case LS_STOPPING:
hexley	0:281d6ff68967	326	if( f->retransmits <= 0 ) {
hexley	0:281d6ff68967	327	FSMDEBUG(LOG_WARNING, ("%s: timeout sending Terminate-Request state=%d (%s)\n",
hexley	0:281d6ff68967	328	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	329	/*
hexley	0:281d6ff68967	330	* We've waited for an ack long enough. Peer probably heard us.
hexley	0:281d6ff68967	331	*/
hexley	0:281d6ff68967	332	f->state = (f->state == LS_CLOSING)? LS_CLOSED: LS_STOPPED;
hexley	0:281d6ff68967	333	if( f->callbacks->finished ) {
hexley	0:281d6ff68967	334	(*f->callbacks->finished)(f);
hexley	0:281d6ff68967	335	}
hexley	0:281d6ff68967	336	} else {
hexley	0:281d6ff68967	337	FSMDEBUG(LOG_WARNING, ("%s: timeout resending Terminate-Requests state=%d (%s)\n",
hexley	0:281d6ff68967	338	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	339	/* Send Terminate-Request */
hexley	0:281d6ff68967	340	fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
hexley	0:281d6ff68967	341	(u_char *) f->term_reason, f->term_reason_len);
hexley	0:281d6ff68967	342	TIMEOUT(fsm_timeout, f, f->timeouttime);
hexley	0:281d6ff68967	343	--f->retransmits;
hexley	0:281d6ff68967	344	}
hexley	0:281d6ff68967	345	break;
hexley	0:281d6ff68967	346
hexley	0:281d6ff68967	347	case LS_REQSENT:
hexley	0:281d6ff68967	348	case LS_ACKRCVD:
hexley	0:281d6ff68967	349	case LS_ACKSENT:
hexley	0:281d6ff68967	350	if (f->retransmits <= 0) {
hexley	0:281d6ff68967	351	FSMDEBUG(LOG_WARNING, ("%s: timeout sending Config-Requests state=%d (%s)\n",
hexley	0:281d6ff68967	352	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	353	f->state = LS_STOPPED;
hexley	0:281d6ff68967	354	if( (f->flags & OPT_PASSIVE) == 0 && f->callbacks->finished ) {
hexley	0:281d6ff68967	355	(*f->callbacks->finished)(f);
hexley	0:281d6ff68967	356	}
hexley	0:281d6ff68967	357	} else {
hexley	0:281d6ff68967	358	FSMDEBUG(LOG_WARNING, ("%s: timeout resending Config-Request state=%d (%s)\n",
hexley	0:281d6ff68967	359	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	360	/* Retransmit the configure-request */
hexley	0:281d6ff68967	361	if (f->callbacks->retransmit) {
hexley	0:281d6ff68967	362	(*f->callbacks->retransmit)(f);
hexley	0:281d6ff68967	363	}
hexley	0:281d6ff68967	364	fsm_sconfreq(f, 1); /* Re-send Configure-Request */
hexley	0:281d6ff68967	365	if( f->state == LS_ACKRCVD ) {
hexley	0:281d6ff68967	366	f->state = LS_REQSENT;
hexley	0:281d6ff68967	367	}
hexley	0:281d6ff68967	368	}
hexley	0:281d6ff68967	369	break;
hexley	0:281d6ff68967	370
hexley	0:281d6ff68967	371	default:
hexley	0:281d6ff68967	372	FSMDEBUG(LOG_INFO, ("%s: UNHANDLED timeout event in state %d (%s)!\n",
hexley	0:281d6ff68967	373	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	374	}
hexley	0:281d6ff68967	375	}
hexley	0:281d6ff68967	376
hexley	0:281d6ff68967	377
hexley	0:281d6ff68967	378	/*
hexley	0:281d6ff68967	379	* fsm_input - Input packet.
hexley	0:281d6ff68967	380	*/
hexley	0:281d6ff68967	381	void
hexley	0:281d6ff68967	382	fsm_input(fsm f, u_char inpacket, int l)
hexley	0:281d6ff68967	383	{
hexley	0:281d6ff68967	384	u_char *inp = inpacket;
hexley	0:281d6ff68967	385	u_char code, id;
hexley	0:281d6ff68967	386	int len;
hexley	0:281d6ff68967	387
hexley	0:281d6ff68967	388	/*
hexley	0:281d6ff68967	389	* Parse header (code, id and length).
hexley	0:281d6ff68967	390	* If packet too short, drop it.
hexley	0:281d6ff68967	391	*/
hexley	0:281d6ff68967	392	if (l < HEADERLEN) {
hexley	0:281d6ff68967	393	FSMDEBUG(LOG_WARNING, ("fsm_input(%x): Rcvd short header.\n",
hexley	0:281d6ff68967	394	f->protocol));
hexley	0:281d6ff68967	395	return;
hexley	0:281d6ff68967	396	}
hexley	0:281d6ff68967	397	GETCHAR(code, inp);
hexley	0:281d6ff68967	398	GETCHAR(id, inp);
hexley	0:281d6ff68967	399	GETSHORT(len, inp);
hexley	0:281d6ff68967	400	if (len < HEADERLEN) {
hexley	0:281d6ff68967	401	FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd illegal length.\n",
hexley	0:281d6ff68967	402	f->protocol));
hexley	0:281d6ff68967	403	return;
hexley	0:281d6ff68967	404	}
hexley	0:281d6ff68967	405	if (len > l) {
hexley	0:281d6ff68967	406	FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd short packet.\n",
hexley	0:281d6ff68967	407	f->protocol));
hexley	0:281d6ff68967	408	return;
hexley	0:281d6ff68967	409	}
hexley	0:281d6ff68967	410	len -= HEADERLEN; /* subtract header length */
hexley	0:281d6ff68967	411
hexley	0:281d6ff68967	412	if( f->state == LS_INITIAL \|\| f->state == LS_STARTING ) {
hexley	0:281d6ff68967	413	FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd packet in state %d (%s).\n",
hexley	0:281d6ff68967	414	f->protocol, f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	415	return;
hexley	0:281d6ff68967	416	}
hexley	0:281d6ff68967	417	FSMDEBUG(LOG_INFO, ("fsm_input(%s):%d,%d,%d\n", PROTO_NAME(f), code, id, l));
hexley	0:281d6ff68967	418	/*
hexley	0:281d6ff68967	419	* Action depends on code.
hexley	0:281d6ff68967	420	*/
hexley	0:281d6ff68967	421	switch (code) {
hexley	0:281d6ff68967	422	case CONFREQ:
hexley	0:281d6ff68967	423	fsm_rconfreq(f, id, inp, len);
hexley	0:281d6ff68967	424	break;
hexley	0:281d6ff68967	425
hexley	0:281d6ff68967	426	case CONFACK:
hexley	0:281d6ff68967	427	fsm_rconfack(f, id, inp, len);
hexley	0:281d6ff68967	428	break;
hexley	0:281d6ff68967	429
hexley	0:281d6ff68967	430	case CONFNAK:
hexley	0:281d6ff68967	431	case CONFREJ:
hexley	0:281d6ff68967	432	fsm_rconfnakrej(f, code, id, inp, len);
hexley	0:281d6ff68967	433	break;
hexley	0:281d6ff68967	434
hexley	0:281d6ff68967	435	case TERMREQ:
hexley	0:281d6ff68967	436	fsm_rtermreq(f, id, inp, len);
hexley	0:281d6ff68967	437	break;
hexley	0:281d6ff68967	438
hexley	0:281d6ff68967	439	case TERMACK:
hexley	0:281d6ff68967	440	fsm_rtermack(f);
hexley	0:281d6ff68967	441	break;
hexley	0:281d6ff68967	442
hexley	0:281d6ff68967	443	case CODEREJ:
hexley	0:281d6ff68967	444	fsm_rcoderej(f, inp, len);
hexley	0:281d6ff68967	445	break;
hexley	0:281d6ff68967	446
hexley	0:281d6ff68967	447	default:
hexley	0:281d6ff68967	448	FSMDEBUG(LOG_INFO, ("fsm_input(%s): default: \n", PROTO_NAME(f)));
hexley	0:281d6ff68967	449	if( !f->callbacks->extcode \|\|
hexley	0:281d6ff68967	450	!(*f->callbacks->extcode)(f, code, id, inp, len) ) {
hexley	0:281d6ff68967	451	fsm_sdata(f, CODEREJ, ++f->id, inpacket, len + HEADERLEN);
hexley	0:281d6ff68967	452	}
hexley	0:281d6ff68967	453	break;
hexley	0:281d6ff68967	454	}
hexley	0:281d6ff68967	455	}
hexley	0:281d6ff68967	456
hexley	0:281d6ff68967	457
hexley	0:281d6ff68967	458	/*
hexley	0:281d6ff68967	459	* fsm_rconfreq - Receive Configure-Request.
hexley	0:281d6ff68967	460	*/
hexley	0:281d6ff68967	461	static void
hexley	0:281d6ff68967	462	fsm_rconfreq(fsm f, u_char id, u_char inp, int len)
hexley	0:281d6ff68967	463	{
hexley	0:281d6ff68967	464	int code, reject_if_disagree;
hexley	0:281d6ff68967	465
hexley	0:281d6ff68967	466	FSMDEBUG(LOG_INFO, ("fsm_rconfreq(%s): Rcvd id %d state=%d (%s)\n",
hexley	0:281d6ff68967	467	PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	468	switch( f->state ) {
hexley	0:281d6ff68967	469	case LS_CLOSED:
hexley	0:281d6ff68967	470	/* Go away, we're closed */
hexley	0:281d6ff68967	471	fsm_sdata(f, TERMACK, id, NULL, 0);
hexley	0:281d6ff68967	472	return;
hexley	0:281d6ff68967	473	case LS_CLOSING:
hexley	0:281d6ff68967	474	case LS_STOPPING:
hexley	0:281d6ff68967	475	return;
hexley	0:281d6ff68967	476
hexley	0:281d6ff68967	477	case LS_OPENED:
hexley	0:281d6ff68967	478	/* Go down and restart negotiation */
hexley	0:281d6ff68967	479	if( f->callbacks->down ) {
hexley	0:281d6ff68967	480	(f->callbacks->down)(f); / Inform upper layers */
hexley	0:281d6ff68967	481	}
hexley	0:281d6ff68967	482	fsm_sconfreq(f, 0); /* Send initial Configure-Request */
hexley	0:281d6ff68967	483	break;
hexley	0:281d6ff68967	484
hexley	0:281d6ff68967	485	case LS_STOPPED:
hexley	0:281d6ff68967	486	/* Negotiation started by our peer */
hexley	0:281d6ff68967	487	fsm_sconfreq(f, 0); /* Send initial Configure-Request */
hexley	0:281d6ff68967	488	f->state = LS_REQSENT;
hexley	0:281d6ff68967	489	break;
hexley	0:281d6ff68967	490	}
hexley	0:281d6ff68967	491
hexley	0:281d6ff68967	492	/*
hexley	0:281d6ff68967	493	* Pass the requested configuration options
hexley	0:281d6ff68967	494	* to protocol-specific code for checking.
hexley	0:281d6ff68967	495	*/
hexley	0:281d6ff68967	496	if (f->callbacks->reqci) { /* Check CI */
hexley	0:281d6ff68967	497	reject_if_disagree = (f->nakloops >= f->maxnakloops);
hexley	0:281d6ff68967	498	code = (*f->callbacks->reqci)(f, inp, &len, reject_if_disagree);
hexley	0:281d6ff68967	499	} else if (len) {
hexley	0:281d6ff68967	500	code = CONFREJ; /* Reject all CI */
hexley	0:281d6ff68967	501	} else {
hexley	0:281d6ff68967	502	code = CONFACK;
hexley	0:281d6ff68967	503	}
hexley	0:281d6ff68967	504
hexley	0:281d6ff68967	505	/* send the Ack, Nak or Rej to the peer */
hexley	0:281d6ff68967	506	fsm_sdata(f, (u_char)code, id, inp, len);
hexley	0:281d6ff68967	507
hexley	0:281d6ff68967	508	if (code == CONFACK) {
hexley	0:281d6ff68967	509	if (f->state == LS_ACKRCVD) {
hexley	0:281d6ff68967	510	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
hexley	0:281d6ff68967	511	f->state = LS_OPENED;
hexley	0:281d6ff68967	512	if (f->callbacks->up) {
hexley	0:281d6ff68967	513	(f->callbacks->up)(f); / Inform upper layers */
hexley	0:281d6ff68967	514	}
hexley	0:281d6ff68967	515	} else {
hexley	0:281d6ff68967	516	f->state = LS_ACKSENT;
hexley	0:281d6ff68967	517	}
hexley	0:281d6ff68967	518	f->nakloops = 0;
hexley	0:281d6ff68967	519	} else {
hexley	0:281d6ff68967	520	/* we sent CONFACK or CONFREJ */
hexley	0:281d6ff68967	521	if (f->state != LS_ACKRCVD) {
hexley	0:281d6ff68967	522	f->state = LS_REQSENT;
hexley	0:281d6ff68967	523	}
hexley	0:281d6ff68967	524	if( code == CONFNAK ) {
hexley	0:281d6ff68967	525	++f->nakloops;
hexley	0:281d6ff68967	526	}
hexley	0:281d6ff68967	527	}
hexley	0:281d6ff68967	528	}
hexley	0:281d6ff68967	529
hexley	0:281d6ff68967	530
hexley	0:281d6ff68967	531	/*
hexley	0:281d6ff68967	532	* fsm_rconfack - Receive Configure-Ack.
hexley	0:281d6ff68967	533	*/
hexley	0:281d6ff68967	534	static void
hexley	0:281d6ff68967	535	fsm_rconfack(fsm f, int id, u_char inp, int len)
hexley	0:281d6ff68967	536	{
hexley	0:281d6ff68967	537	FSMDEBUG(LOG_INFO, ("fsm_rconfack(%s): Rcvd id %d state=%d (%s)\n",
hexley	0:281d6ff68967	538	PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	539
hexley	0:281d6ff68967	540	if (id != f->reqid \|\| f->seen_ack) { /* Expected id? */
hexley	0:281d6ff68967	541	return; /* Nope, toss... */
hexley	0:281d6ff68967	542	}
hexley	0:281d6ff68967	543	if( !(f->callbacks->ackci? (*f->callbacks->ackci)(f, inp, len): (len == 0)) ) {
hexley	0:281d6ff68967	544	/* Ack is bad - ignore it */
hexley	0:281d6ff68967	545	FSMDEBUG(LOG_INFO, ("%s: received bad Ack (length %d)\n",
hexley	0:281d6ff68967	546	PROTO_NAME(f), len));
hexley	0:281d6ff68967	547	return;
hexley	0:281d6ff68967	548	}
hexley	0:281d6ff68967	549	f->seen_ack = 1;
hexley	0:281d6ff68967	550
hexley	0:281d6ff68967	551	switch (f->state) {
hexley	0:281d6ff68967	552	case LS_CLOSED:
hexley	0:281d6ff68967	553	case LS_STOPPED:
hexley	0:281d6ff68967	554	fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
hexley	0:281d6ff68967	555	break;
hexley	0:281d6ff68967	556
hexley	0:281d6ff68967	557	case LS_REQSENT:
hexley	0:281d6ff68967	558	f->state = LS_ACKRCVD;
hexley	0:281d6ff68967	559	f->retransmits = f->maxconfreqtransmits;
hexley	0:281d6ff68967	560	break;
hexley	0:281d6ff68967	561
hexley	0:281d6ff68967	562	case LS_ACKRCVD:
hexley	0:281d6ff68967	563	/* Huh? an extra valid Ack? oh well... */
hexley	0:281d6ff68967	564	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
hexley	0:281d6ff68967	565	fsm_sconfreq(f, 0);
hexley	0:281d6ff68967	566	f->state = LS_REQSENT;
hexley	0:281d6ff68967	567	break;
hexley	0:281d6ff68967	568
hexley	0:281d6ff68967	569	case LS_ACKSENT:
hexley	0:281d6ff68967	570	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
hexley	0:281d6ff68967	571	f->state = LS_OPENED;
hexley	0:281d6ff68967	572	f->retransmits = f->maxconfreqtransmits;
hexley	0:281d6ff68967	573	if (f->callbacks->up) {
hexley	0:281d6ff68967	574	(f->callbacks->up)(f); / Inform upper layers */
hexley	0:281d6ff68967	575	}
hexley	0:281d6ff68967	576	break;
hexley	0:281d6ff68967	577
hexley	0:281d6ff68967	578	case LS_OPENED:
hexley	0:281d6ff68967	579	/* Go down and restart negotiation */
hexley	0:281d6ff68967	580	if (f->callbacks->down) {
hexley	0:281d6ff68967	581	(f->callbacks->down)(f); / Inform upper layers */
hexley	0:281d6ff68967	582	}
hexley	0:281d6ff68967	583	fsm_sconfreq(f, 0); /* Send initial Configure-Request */
hexley	0:281d6ff68967	584	f->state = LS_REQSENT;
hexley	0:281d6ff68967	585	break;
hexley	0:281d6ff68967	586	}
hexley	0:281d6ff68967	587	}
hexley	0:281d6ff68967	588
hexley	0:281d6ff68967	589
hexley	0:281d6ff68967	590	/*
hexley	0:281d6ff68967	591	* fsm_rconfnakrej - Receive Configure-Nak or Configure-Reject.
hexley	0:281d6ff68967	592	*/
hexley	0:281d6ff68967	593	static void
hexley	0:281d6ff68967	594	fsm_rconfnakrej(fsm f, int code, int id, u_char inp, int len)
hexley	0:281d6ff68967	595	{
hexley	0:281d6ff68967	596	int (proc) (fsm , u_char *, int);
hexley	0:281d6ff68967	597	int ret;
hexley	0:281d6ff68967	598
hexley	0:281d6ff68967	599	FSMDEBUG(LOG_INFO, ("fsm_rconfnakrej(%s): Rcvd id %d state=%d (%s)\n",
hexley	0:281d6ff68967	600	PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	601
hexley	0:281d6ff68967	602	if (id != f->reqid \|\| f->seen_ack) { /* Expected id? */
hexley	0:281d6ff68967	603	return; /* Nope, toss... */
hexley	0:281d6ff68967	604	}
hexley	0:281d6ff68967	605	proc = (code == CONFNAK)? f->callbacks->nakci: f->callbacks->rejci;
hexley	0:281d6ff68967	606	if (!proc \|\| !((ret = proc(f, inp, len)))) {
hexley	0:281d6ff68967	607	/* Nak/reject is bad - ignore it */
hexley	0:281d6ff68967	608	FSMDEBUG(LOG_INFO, ("%s: received bad %s (length %d)\n",
hexley	0:281d6ff68967	609	PROTO_NAME(f), (code==CONFNAK? "Nak": "reject"), len));
hexley	0:281d6ff68967	610	return;
hexley	0:281d6ff68967	611	}
hexley	0:281d6ff68967	612	f->seen_ack = 1;
hexley	0:281d6ff68967	613
hexley	0:281d6ff68967	614	switch (f->state) {
hexley	0:281d6ff68967	615	case LS_CLOSED:
hexley	0:281d6ff68967	616	case LS_STOPPED:
hexley	0:281d6ff68967	617	fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
hexley	0:281d6ff68967	618	break;
hexley	0:281d6ff68967	619
hexley	0:281d6ff68967	620	case LS_REQSENT:
hexley	0:281d6ff68967	621	case LS_ACKSENT:
hexley	0:281d6ff68967	622	/* They didn't agree to what we wanted - try another request */
hexley	0:281d6ff68967	623	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
hexley	0:281d6ff68967	624	if (ret < 0) {
hexley	0:281d6ff68967	625	f->state = LS_STOPPED; /* kludge for stopping CCP */
hexley	0:281d6ff68967	626	} else {
hexley	0:281d6ff68967	627	fsm_sconfreq(f, 0); /* Send Configure-Request */
hexley	0:281d6ff68967	628	}
hexley	0:281d6ff68967	629	break;
hexley	0:281d6ff68967	630
hexley	0:281d6ff68967	631	case LS_ACKRCVD:
hexley	0:281d6ff68967	632	/* Got a Nak/reject when we had already had an Ack?? oh well... */
hexley	0:281d6ff68967	633	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
hexley	0:281d6ff68967	634	fsm_sconfreq(f, 0);
hexley	0:281d6ff68967	635	f->state = LS_REQSENT;
hexley	0:281d6ff68967	636	break;
hexley	0:281d6ff68967	637
hexley	0:281d6ff68967	638	case LS_OPENED:
hexley	0:281d6ff68967	639	/* Go down and restart negotiation */
hexley	0:281d6ff68967	640	if (f->callbacks->down) {
hexley	0:281d6ff68967	641	(f->callbacks->down)(f); / Inform upper layers */
hexley	0:281d6ff68967	642	}
hexley	0:281d6ff68967	643	fsm_sconfreq(f, 0); /* Send initial Configure-Request */
hexley	0:281d6ff68967	644	f->state = LS_REQSENT;
hexley	0:281d6ff68967	645	break;
hexley	0:281d6ff68967	646	}
hexley	0:281d6ff68967	647	}
hexley	0:281d6ff68967	648
hexley	0:281d6ff68967	649
hexley	0:281d6ff68967	650	/*
hexley	0:281d6ff68967	651	* fsm_rtermreq - Receive Terminate-Req.
hexley	0:281d6ff68967	652	*/
hexley	0:281d6ff68967	653	static void
hexley	0:281d6ff68967	654	fsm_rtermreq(fsm f, int id, u_char p, int len)
hexley	0:281d6ff68967	655	{
hexley	0:281d6ff68967	656	LWIP_UNUSED_ARG(p);
hexley	0:281d6ff68967	657
hexley	0:281d6ff68967	658	FSMDEBUG(LOG_INFO, ("fsm_rtermreq(%s): Rcvd id %d state=%d (%s)\n",
hexley	0:281d6ff68967	659	PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	660
hexley	0:281d6ff68967	661	switch (f->state) {
hexley	0:281d6ff68967	662	case LS_ACKRCVD:
hexley	0:281d6ff68967	663	case LS_ACKSENT:
hexley	0:281d6ff68967	664	f->state = LS_REQSENT; /* Start over but keep trying */
hexley	0:281d6ff68967	665	break;
hexley	0:281d6ff68967	666
hexley	0:281d6ff68967	667	case LS_OPENED:
hexley	0:281d6ff68967	668	if (len > 0) {
hexley	0:281d6ff68967	669	FSMDEBUG(LOG_INFO, ("%s terminated by peer (%p)\n", PROTO_NAME(f), p));
hexley	0:281d6ff68967	670	} else {
hexley	0:281d6ff68967	671	FSMDEBUG(LOG_INFO, ("%s terminated by peer\n", PROTO_NAME(f)));
hexley	0:281d6ff68967	672	}
hexley	0:281d6ff68967	673	if (f->callbacks->down) {
hexley	0:281d6ff68967	674	(f->callbacks->down)(f); / Inform upper layers */
hexley	0:281d6ff68967	675	}
hexley	0:281d6ff68967	676	f->retransmits = 0;
hexley	0:281d6ff68967	677	f->state = LS_STOPPING;
hexley	0:281d6ff68967	678	TIMEOUT(fsm_timeout, f, f->timeouttime);
hexley	0:281d6ff68967	679	break;
hexley	0:281d6ff68967	680	}
hexley	0:281d6ff68967	681
hexley	0:281d6ff68967	682	fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
hexley	0:281d6ff68967	683	}
hexley	0:281d6ff68967	684
hexley	0:281d6ff68967	685
hexley	0:281d6ff68967	686	/*
hexley	0:281d6ff68967	687	* fsm_rtermack - Receive Terminate-Ack.
hexley	0:281d6ff68967	688	*/
hexley	0:281d6ff68967	689	static void
hexley	0:281d6ff68967	690	fsm_rtermack(fsm *f)
hexley	0:281d6ff68967	691	{
hexley	0:281d6ff68967	692	FSMDEBUG(LOG_INFO, ("fsm_rtermack(%s): state=%d (%s)\n",
hexley	0:281d6ff68967	693	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	694
hexley	0:281d6ff68967	695	switch (f->state) {
hexley	0:281d6ff68967	696	case LS_CLOSING:
hexley	0:281d6ff68967	697	UNTIMEOUT(fsm_timeout, f);
hexley	0:281d6ff68967	698	f->state = LS_CLOSED;
hexley	0:281d6ff68967	699	if( f->callbacks->finished ) {
hexley	0:281d6ff68967	700	(*f->callbacks->finished)(f);
hexley	0:281d6ff68967	701	}
hexley	0:281d6ff68967	702	break;
hexley	0:281d6ff68967	703
hexley	0:281d6ff68967	704	case LS_STOPPING:
hexley	0:281d6ff68967	705	UNTIMEOUT(fsm_timeout, f);
hexley	0:281d6ff68967	706	f->state = LS_STOPPED;
hexley	0:281d6ff68967	707	if( f->callbacks->finished ) {
hexley	0:281d6ff68967	708	(*f->callbacks->finished)(f);
hexley	0:281d6ff68967	709	}
hexley	0:281d6ff68967	710	break;
hexley	0:281d6ff68967	711
hexley	0:281d6ff68967	712	case LS_ACKRCVD:
hexley	0:281d6ff68967	713	f->state = LS_REQSENT;
hexley	0:281d6ff68967	714	break;
hexley	0:281d6ff68967	715
hexley	0:281d6ff68967	716	case LS_OPENED:
hexley	0:281d6ff68967	717	if (f->callbacks->down) {
hexley	0:281d6ff68967	718	(f->callbacks->down)(f); / Inform upper layers */
hexley	0:281d6ff68967	719	}
hexley	0:281d6ff68967	720	fsm_sconfreq(f, 0);
hexley	0:281d6ff68967	721	break;
hexley	0:281d6ff68967	722	default:
hexley	0:281d6ff68967	723	FSMDEBUG(LOG_INFO, ("fsm_rtermack(%s): UNHANDLED state=%d (%s)!!!\n",
hexley	0:281d6ff68967	724	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	725	}
hexley	0:281d6ff68967	726	}
hexley	0:281d6ff68967	727
hexley	0:281d6ff68967	728
hexley	0:281d6ff68967	729	/*
hexley	0:281d6ff68967	730	* fsm_rcoderej - Receive an Code-Reject.
hexley	0:281d6ff68967	731	*/
hexley	0:281d6ff68967	732	static void
hexley	0:281d6ff68967	733	fsm_rcoderej(fsm f, u_char inp, int len)
hexley	0:281d6ff68967	734	{
hexley	0:281d6ff68967	735	u_char code, id;
hexley	0:281d6ff68967	736
hexley	0:281d6ff68967	737	FSMDEBUG(LOG_INFO, ("fsm_rcoderej(%s): state=%d (%s)\n",
hexley	0:281d6ff68967	738	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	739
hexley	0:281d6ff68967	740	if (len < HEADERLEN) {
hexley	0:281d6ff68967	741	FSMDEBUG(LOG_INFO, ("fsm_rcoderej: Rcvd short Code-Reject packet!\n"));
hexley	0:281d6ff68967	742	return;
hexley	0:281d6ff68967	743	}
hexley	0:281d6ff68967	744	GETCHAR(code, inp);
hexley	0:281d6ff68967	745	GETCHAR(id, inp);
hexley	0:281d6ff68967	746	FSMDEBUG(LOG_WARNING, ("%s: Rcvd Code-Reject for code %d, id %d\n",
hexley	0:281d6ff68967	747	PROTO_NAME(f), code, id));
hexley	0:281d6ff68967	748
hexley	0:281d6ff68967	749	if( f->state == LS_ACKRCVD ) {
hexley	0:281d6ff68967	750	f->state = LS_REQSENT;
hexley	0:281d6ff68967	751	}
hexley	0:281d6ff68967	752	}
hexley	0:281d6ff68967	753
hexley	0:281d6ff68967	754
hexley	0:281d6ff68967	755	/*
hexley	0:281d6ff68967	756	* fsm_protreject - Peer doesn't speak this protocol.
hexley	0:281d6ff68967	757	*
hexley	0:281d6ff68967	758	* Treat this as a catastrophic error (RXJ-).
hexley	0:281d6ff68967	759	*/
hexley	0:281d6ff68967	760	void
hexley	0:281d6ff68967	761	fsm_protreject(fsm *f)
hexley	0:281d6ff68967	762	{
hexley	0:281d6ff68967	763	switch( f->state ) {
hexley	0:281d6ff68967	764	case LS_CLOSING:
hexley	0:281d6ff68967	765	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
hexley	0:281d6ff68967	766	/* fall through */
hexley	0:281d6ff68967	767	case LS_CLOSED:
hexley	0:281d6ff68967	768	f->state = LS_CLOSED;
hexley	0:281d6ff68967	769	if( f->callbacks->finished ) {
hexley	0:281d6ff68967	770	(*f->callbacks->finished)(f);
hexley	0:281d6ff68967	771	}
hexley	0:281d6ff68967	772	break;
hexley	0:281d6ff68967	773
hexley	0:281d6ff68967	774	case LS_STOPPING:
hexley	0:281d6ff68967	775	case LS_REQSENT:
hexley	0:281d6ff68967	776	case LS_ACKRCVD:
hexley	0:281d6ff68967	777	case LS_ACKSENT:
hexley	0:281d6ff68967	778	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
hexley	0:281d6ff68967	779	/* fall through */
hexley	0:281d6ff68967	780	case LS_STOPPED:
hexley	0:281d6ff68967	781	f->state = LS_STOPPED;
hexley	0:281d6ff68967	782	if( f->callbacks->finished ) {
hexley	0:281d6ff68967	783	(*f->callbacks->finished)(f);
hexley	0:281d6ff68967	784	}
hexley	0:281d6ff68967	785	break;
hexley	0:281d6ff68967	786
hexley	0:281d6ff68967	787	case LS_OPENED:
hexley	0:281d6ff68967	788	if( f->callbacks->down ) {
hexley	0:281d6ff68967	789	(*f->callbacks->down)(f);
hexley	0:281d6ff68967	790	}
hexley	0:281d6ff68967	791	/* Init restart counter, send Terminate-Request */
hexley	0:281d6ff68967	792	f->retransmits = f->maxtermtransmits;
hexley	0:281d6ff68967	793	fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
hexley	0:281d6ff68967	794	(u_char *) f->term_reason, f->term_reason_len);
hexley	0:281d6ff68967	795	TIMEOUT(fsm_timeout, f, f->timeouttime);
hexley	0:281d6ff68967	796	--f->retransmits;
hexley	0:281d6ff68967	797
hexley	0:281d6ff68967	798	f->state = LS_STOPPING;
hexley	0:281d6ff68967	799	break;
hexley	0:281d6ff68967	800
hexley	0:281d6ff68967	801	default:
hexley	0:281d6ff68967	802	FSMDEBUG(LOG_INFO, ("%s: Protocol-reject event in state %d (%s)!\n",
hexley	0:281d6ff68967	803	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
hexley	0:281d6ff68967	804	}
hexley	0:281d6ff68967	805	}
hexley	0:281d6ff68967	806
hexley	0:281d6ff68967	807
hexley	0:281d6ff68967	808	/*
hexley	0:281d6ff68967	809	* fsm_sconfreq - Send a Configure-Request.
hexley	0:281d6ff68967	810	*/
hexley	0:281d6ff68967	811	static void
hexley	0:281d6ff68967	812	fsm_sconfreq(fsm *f, int retransmit)
hexley	0:281d6ff68967	813	{
hexley	0:281d6ff68967	814	u_char *outp;
hexley	0:281d6ff68967	815	int cilen;
hexley	0:281d6ff68967	816
hexley	0:281d6ff68967	817	if( f->state != LS_REQSENT && f->state != LS_ACKRCVD && f->state != LS_ACKSENT ) {
hexley	0:281d6ff68967	818	/* Not currently negotiating - reset options */
hexley	0:281d6ff68967	819	if( f->callbacks->resetci ) {
hexley	0:281d6ff68967	820	(*f->callbacks->resetci)(f);
hexley	0:281d6ff68967	821	}
hexley	0:281d6ff68967	822	f->nakloops = 0;
hexley	0:281d6ff68967	823	}
hexley	0:281d6ff68967	824
hexley	0:281d6ff68967	825	if( !retransmit ) {
hexley	0:281d6ff68967	826	/* New request - reset retransmission counter, use new ID */
hexley	0:281d6ff68967	827	f->retransmits = f->maxconfreqtransmits;
hexley	0:281d6ff68967	828	f->reqid = ++f->id;
hexley	0:281d6ff68967	829	}
hexley	0:281d6ff68967	830
hexley	0:281d6ff68967	831	f->seen_ack = 0;
hexley	0:281d6ff68967	832
hexley	0:281d6ff68967	833	/*
hexley	0:281d6ff68967	834	* Make up the request packet
hexley	0:281d6ff68967	835	*/
hexley	0:281d6ff68967	836	outp = outpacket_buf[f->unit] + PPP_HDRLEN + HEADERLEN;
hexley	0:281d6ff68967	837	if( f->callbacks->cilen && f->callbacks->addci ) {
hexley	0:281d6ff68967	838	cilen = (*f->callbacks->cilen)(f);
hexley	0:281d6ff68967	839	if( cilen > peer_mru[f->unit] - (int)HEADERLEN ) {
hexley	0:281d6ff68967	840	cilen = peer_mru[f->unit] - HEADERLEN;
hexley	0:281d6ff68967	841	}
hexley	0:281d6ff68967	842	if (f->callbacks->addci) {
hexley	0:281d6ff68967	843	(*f->callbacks->addci)(f, outp, &cilen);
hexley	0:281d6ff68967	844	}
hexley	0:281d6ff68967	845	} else {
hexley	0:281d6ff68967	846	cilen = 0;
hexley	0:281d6ff68967	847	}
hexley	0:281d6ff68967	848
hexley	0:281d6ff68967	849	/* send the request to our peer */
hexley	0:281d6ff68967	850	fsm_sdata(f, CONFREQ, f->reqid, outp, cilen);
hexley	0:281d6ff68967	851
hexley	0:281d6ff68967	852	/* start the retransmit timer */
hexley	0:281d6ff68967	853	--f->retransmits;
hexley	0:281d6ff68967	854	TIMEOUT(fsm_timeout, f, f->timeouttime);
hexley	0:281d6ff68967	855
hexley	0:281d6ff68967	856	FSMDEBUG(LOG_INFO, ("%s: sending Configure-Request, id %d\n",
hexley	0:281d6ff68967	857	PROTO_NAME(f), f->reqid));
hexley	0:281d6ff68967	858	}
hexley	0:281d6ff68967	859
hexley	0:281d6ff68967	860
hexley	0:281d6ff68967	861	/*
hexley	0:281d6ff68967	862	* fsm_sdata - Send some data.
hexley	0:281d6ff68967	863	*
hexley	0:281d6ff68967	864	* Used for all packets sent to our peer by this module.
hexley	0:281d6ff68967	865	*/
hexley	0:281d6ff68967	866	void
hexley	0:281d6ff68967	867	fsm_sdata( fsm f, u_char code, u_char id, u_char data, int datalen)
hexley	0:281d6ff68967	868	{
hexley	0:281d6ff68967	869	u_char *outp;
hexley	0:281d6ff68967	870	int outlen;
hexley	0:281d6ff68967	871
hexley	0:281d6ff68967	872	/* Adjust length to be smaller than MTU */
hexley	0:281d6ff68967	873	outp = outpacket_buf[f->unit];
hexley	0:281d6ff68967	874	if (datalen > peer_mru[f->unit] - (int)HEADERLEN) {
hexley	0:281d6ff68967	875	datalen = peer_mru[f->unit] - HEADERLEN;
hexley	0:281d6ff68967	876	}
hexley	0:281d6ff68967	877	if (datalen && data != outp + PPP_HDRLEN + HEADERLEN) {
hexley	0:281d6ff68967	878	BCOPY(data, outp + PPP_HDRLEN + HEADERLEN, datalen);
hexley	0:281d6ff68967	879	}
hexley	0:281d6ff68967	880	outlen = datalen + HEADERLEN;
hexley	0:281d6ff68967	881	MAKEHEADER(outp, f->protocol);
hexley	0:281d6ff68967	882	PUTCHAR(code, outp);
hexley	0:281d6ff68967	883	PUTCHAR(id, outp);
hexley	0:281d6ff68967	884	PUTSHORT(outlen, outp);
hexley	0:281d6ff68967	885	pppWrite(f->unit, outpacket_buf[f->unit], outlen + PPP_HDRLEN);
hexley	0:281d6ff68967	886	FSMDEBUG(LOG_INFO, ("fsm_sdata(%s): Sent code %d,%d,%d.\n",
hexley	0:281d6ff68967	887	PROTO_NAME(f), code, id, outlen));
hexley	0:281d6ff68967	888	}
hexley	0:281d6ff68967	889
hexley	0:281d6ff68967	890	#endif /* PPP_SUPPORT */

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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.c@0:281d6ff68967, 2010-11-19 (annotated)

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