XBeeWiFi_common - EthernetNetIf Compatibility.

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EthernetNetIf Compatibility.

Dependents: XBeeWiFi_SPI_example

Fork of NetServicesSource by Donatien Garnier

lwip/netif/ppp/fsm.c@4:fd826cad83c0, 2010-07-09 (annotated)

Committer:: donatien
Date:: Fri Jul 09 14:46:47 2010 +0000
Revision:: 4:fd826cad83c0
Parent:: 0:632c9925f013
Child:: 5:dd63a1e02b1b

Who changed what in which revision?

User	Revision	Line number	New contents of line
donatien	0:632c9925f013	1	/*****************************************************************************
donatien	0:632c9925f013	2	* fsm.c - Network Control Protocol Finite State Machine program file.
donatien	0:632c9925f013	3	*
donatien	0:632c9925f013	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
donatien	0:632c9925f013	5	* portions Copyright (c) 1997 by Global Election Systems Inc.
donatien	0:632c9925f013	6	*
donatien	0:632c9925f013	7	* The authors hereby grant permission to use, copy, modify, distribute,
donatien	0:632c9925f013	8	* and license this software and its documentation for any purpose, provided
donatien	0:632c9925f013	9	* that existing copyright notices are retained in all copies and that this
donatien	0:632c9925f013	10	* notice and the following disclaimer are included verbatim in any
donatien	0:632c9925f013	11	* distributions. No written agreement, license, or royalty fee is required
donatien	0:632c9925f013	12	* for any of the authorized uses.
donatien	0:632c9925f013	13	*
donatien	0:632c9925f013	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
donatien	0:632c9925f013	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
donatien	0:632c9925f013	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
donatien	0:632c9925f013	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
donatien	0:632c9925f013	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
donatien	0:632c9925f013	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
donatien	0:632c9925f013	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
donatien	0:632c9925f013	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
donatien	0:632c9925f013	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
donatien	0:632c9925f013	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
donatien	0:632c9925f013	24	*
donatien	0:632c9925f013	25	******************************************************************************
donatien	0:632c9925f013	26	* REVISION HISTORY
donatien	0:632c9925f013	27	*
donatien	0:632c9925f013	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
donatien	0:632c9925f013	29	* Ported to lwIP.
donatien	0:632c9925f013	30	* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
donatien	0:632c9925f013	31	* Original based on BSD fsm.c.
donatien	0:632c9925f013	32	*****************************************************************************/
donatien	0:632c9925f013	33	/*
donatien	0:632c9925f013	34	* fsm.c - {Link, IP} Control Protocol Finite State Machine.
donatien	0:632c9925f013	35	*
donatien	0:632c9925f013	36	* Copyright (c) 1989 Carnegie Mellon University.
donatien	0:632c9925f013	37	* All rights reserved.
donatien	0:632c9925f013	38	*
donatien	0:632c9925f013	39	* Redistribution and use in source and binary forms are permitted
donatien	0:632c9925f013	40	* provided that the above copyright notice and this paragraph are
donatien	0:632c9925f013	41	* duplicated in all such forms and that any documentation,
donatien	0:632c9925f013	42	* advertising materials, and other materials related to such
donatien	0:632c9925f013	43	* distribution and use acknowledge that the software was developed
donatien	0:632c9925f013	44	* by Carnegie Mellon University. The name of the
donatien	0:632c9925f013	45	* University may not be used to endorse or promote products derived
donatien	0:632c9925f013	46	* from this software without specific prior written permission.
donatien	0:632c9925f013	47	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
donatien	0:632c9925f013	48	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
donatien	0:632c9925f013	49	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
donatien	0:632c9925f013	50	*/
donatien	0:632c9925f013	51
donatien	0:632c9925f013	52	/*
donatien	0:632c9925f013	53	* TODO:
donatien	0:632c9925f013	54	* Randomize fsm id on link/init.
donatien	0:632c9925f013	55	* Deal with variable outgoing MTU.
donatien	0:632c9925f013	56	*/
donatien	0:632c9925f013	57
donatien	0:632c9925f013	58	#include "lwip/opt.h"
donatien	0:632c9925f013	59
donatien	0:632c9925f013	60	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
donatien	0:632c9925f013	61
donatien	0:632c9925f013	62	#include "ppp.h"
donatien	0:632c9925f013	63	#include "pppdebug.h"
donatien	0:632c9925f013	64
donatien	0:632c9925f013	65	#include "fsm.h"
donatien	0:632c9925f013	66
donatien	0:632c9925f013	67	#include <string.h>
donatien	0:632c9925f013	68
donatien	0:632c9925f013	69	#if PPP_DEBUG
donatien	0:632c9925f013	70	static const char *ppperr_strerr[] = {
donatien	0:632c9925f013	71	"LS_INITIAL", /* LS_INITIAL 0 */
donatien	0:632c9925f013	72	"LS_STARTING", /* LS_STARTING 1 */
donatien	0:632c9925f013	73	"LS_CLOSED", /* LS_CLOSED 2 */
donatien	0:632c9925f013	74	"LS_STOPPED", /* LS_STOPPED 3 */
donatien	0:632c9925f013	75	"LS_CLOSING", /* LS_CLOSING 4 */
donatien	0:632c9925f013	76	"LS_STOPPING", /* LS_STOPPING 5 */
donatien	0:632c9925f013	77	"LS_REQSENT", /* LS_REQSENT 6 */
donatien	0:632c9925f013	78	"LS_ACKRCVD", /* LS_ACKRCVD 7 */
donatien	0:632c9925f013	79	"LS_ACKSENT", /* LS_ACKSENT 8 */
donatien	0:632c9925f013	80	"LS_OPENED" /* LS_OPENED 9 */
donatien	0:632c9925f013	81	};
donatien	0:632c9925f013	82	#endif /* PPP_DEBUG */
donatien	0:632c9925f013	83
donatien	0:632c9925f013	84	static void fsm_timeout (void *);
donatien	0:632c9925f013	85	static void fsm_rconfreq (fsm , u_char, u_char , int);
donatien	0:632c9925f013	86	static void fsm_rconfack (fsm , int, u_char , int);
donatien	0:632c9925f013	87	static void fsm_rconfnakrej (fsm , int, int, u_char , int);
donatien	0:632c9925f013	88	static void fsm_rtermreq (fsm , int, u_char , int);
donatien	0:632c9925f013	89	static void fsm_rtermack (fsm *);
donatien	0:632c9925f013	90	static void fsm_rcoderej (fsm , u_char , int);
donatien	0:632c9925f013	91	static void fsm_sconfreq (fsm *, int);
donatien	0:632c9925f013	92
donatien	0:632c9925f013	93	#define PROTO_NAME(f) ((f)->callbacks->proto_name)
donatien	0:632c9925f013	94
donatien	0:632c9925f013	95	int peer_mru[NUM_PPP];
donatien	0:632c9925f013	96
donatien	0:632c9925f013	97
donatien	0:632c9925f013	98	/*
donatien	0:632c9925f013	99	* fsm_init - Initialize fsm.
donatien	0:632c9925f013	100	*
donatien	0:632c9925f013	101	* Initialize fsm state.
donatien	0:632c9925f013	102	*/
donatien	0:632c9925f013	103	void
donatien	0:632c9925f013	104	fsm_init(fsm *f)
donatien	0:632c9925f013	105	{
donatien	0:632c9925f013	106	f->state = LS_INITIAL;
donatien	0:632c9925f013	107	f->flags = 0;
donatien	0:632c9925f013	108	f->id = 0; /* XXX Start with random id? */
donatien	0:632c9925f013	109	f->timeouttime = FSM_DEFTIMEOUT;
donatien	0:632c9925f013	110	f->maxconfreqtransmits = FSM_DEFMAXCONFREQS;
donatien	0:632c9925f013	111	f->maxtermtransmits = FSM_DEFMAXTERMREQS;
donatien	0:632c9925f013	112	f->maxnakloops = FSM_DEFMAXNAKLOOPS;
donatien	0:632c9925f013	113	f->term_reason_len = 0;
donatien	0:632c9925f013	114	}
donatien	0:632c9925f013	115
donatien	0:632c9925f013	116
donatien	0:632c9925f013	117	/*
donatien	0:632c9925f013	118	* fsm_lowerup - The lower layer is up.
donatien	0:632c9925f013	119	*/
donatien	0:632c9925f013	120	void
donatien	0:632c9925f013	121	fsm_lowerup(fsm *f)
donatien	0:632c9925f013	122	{
donatien	0:632c9925f013	123	#if PPP_DEBUG
donatien	0:632c9925f013	124	int oldState = f->state;
donatien	4:fd826cad83c0	125
donatien	0:632c9925f013	126	LWIP_UNUSED_ARG(oldState);
donatien	0:632c9925f013	127	#endif
donatien	0:632c9925f013	128
donatien	0:632c9925f013	129	switch( f->state ) {
donatien	0:632c9925f013	130	case LS_INITIAL:
donatien	0:632c9925f013	131	f->state = LS_CLOSED;
donatien	0:632c9925f013	132	break;
donatien	0:632c9925f013	133
donatien	0:632c9925f013	134	case LS_STARTING:
donatien	0:632c9925f013	135	if( f->flags & OPT_SILENT ) {
donatien	0:632c9925f013	136	f->state = LS_STOPPED;
donatien	0:632c9925f013	137	} else {
donatien	0:632c9925f013	138	/* Send an initial configure-request */
donatien	0:632c9925f013	139	fsm_sconfreq(f, 0);
donatien	0:632c9925f013	140	f->state = LS_REQSENT;
donatien	0:632c9925f013	141	}
donatien	0:632c9925f013	142	break;
donatien	0:632c9925f013	143
donatien	0:632c9925f013	144	default:
donatien	0:632c9925f013	145	FSMDEBUG(LOG_INFO, ("%s: Up event in state %d (%s)!\n",
donatien	0:632c9925f013	146	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	147	}
donatien	0:632c9925f013	148
donatien	0:632c9925f013	149	FSMDEBUG(LOG_INFO, ("%s: lowerup state %d (%s) -> %d (%s)\n",
donatien	0:632c9925f013	150	PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	151	}
donatien	0:632c9925f013	152
donatien	0:632c9925f013	153
donatien	0:632c9925f013	154	/*
donatien	0:632c9925f013	155	* fsm_lowerdown - The lower layer is down.
donatien	0:632c9925f013	156	*
donatien	0:632c9925f013	157	* Cancel all timeouts and inform upper layers.
donatien	0:632c9925f013	158	*/
donatien	0:632c9925f013	159	void
donatien	0:632c9925f013	160	fsm_lowerdown(fsm *f)
donatien	0:632c9925f013	161	{
donatien	0:632c9925f013	162	#if PPP_DEBUG
donatien	0:632c9925f013	163	int oldState = f->state;
donatien	0:632c9925f013	164
donatien	0:632c9925f013	165	LWIP_UNUSED_ARG(oldState);
donatien	0:632c9925f013	166	#endif
donatien	0:632c9925f013	167
donatien	0:632c9925f013	168	switch( f->state ) {
donatien	0:632c9925f013	169	case LS_CLOSED:
donatien	0:632c9925f013	170	f->state = LS_INITIAL;
donatien	0:632c9925f013	171	break;
donatien	0:632c9925f013	172
donatien	0:632c9925f013	173	case LS_STOPPED:
donatien	0:632c9925f013	174	f->state = LS_STARTING;
donatien	0:632c9925f013	175	if( f->callbacks->starting ) {
donatien	0:632c9925f013	176	(*f->callbacks->starting)(f);
donatien	0:632c9925f013	177	}
donatien	0:632c9925f013	178	break;
donatien	0:632c9925f013	179
donatien	0:632c9925f013	180	case LS_CLOSING:
donatien	0:632c9925f013	181	f->state = LS_INITIAL;
donatien	0:632c9925f013	182	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien	0:632c9925f013	183	break;
donatien	0:632c9925f013	184
donatien	0:632c9925f013	185	case LS_STOPPING:
donatien	0:632c9925f013	186	case LS_REQSENT:
donatien	0:632c9925f013	187	case LS_ACKRCVD:
donatien	0:632c9925f013	188	case LS_ACKSENT:
donatien	0:632c9925f013	189	f->state = LS_STARTING;
donatien	0:632c9925f013	190	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien	0:632c9925f013	191	break;
donatien	0:632c9925f013	192
donatien	0:632c9925f013	193	case LS_OPENED:
donatien	0:632c9925f013	194	if( f->callbacks->down ) {
donatien	0:632c9925f013	195	(*f->callbacks->down)(f);
donatien	0:632c9925f013	196	}
donatien	0:632c9925f013	197	f->state = LS_STARTING;
donatien	0:632c9925f013	198	break;
donatien	0:632c9925f013	199
donatien	0:632c9925f013	200	default:
donatien	0:632c9925f013	201	FSMDEBUG(LOG_INFO, ("%s: Down event in state %d (%s)!\n",
donatien	0:632c9925f013	202	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	203	}
donatien	0:632c9925f013	204
donatien	0:632c9925f013	205	FSMDEBUG(LOG_INFO, ("%s: lowerdown state %d (%s) -> %d (%s)\n",
donatien	0:632c9925f013	206	PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	207	}
donatien	0:632c9925f013	208
donatien	0:632c9925f013	209
donatien	0:632c9925f013	210	/*
donatien	0:632c9925f013	211	* fsm_open - Link is allowed to come up.
donatien	0:632c9925f013	212	*/
donatien	0:632c9925f013	213	void
donatien	0:632c9925f013	214	fsm_open(fsm *f)
donatien	0:632c9925f013	215	{
donatien	0:632c9925f013	216	#if PPP_DEBUG
donatien	0:632c9925f013	217	int oldState = f->state;
donatien	0:632c9925f013	218
donatien	0:632c9925f013	219	LWIP_UNUSED_ARG(oldState);
donatien	0:632c9925f013	220	#endif
donatien	0:632c9925f013	221
donatien	0:632c9925f013	222	switch( f->state ) {
donatien	0:632c9925f013	223	case LS_INITIAL:
donatien	0:632c9925f013	224	f->state = LS_STARTING;
donatien	0:632c9925f013	225	if( f->callbacks->starting ) {
donatien	0:632c9925f013	226	(*f->callbacks->starting)(f);
donatien	0:632c9925f013	227	}
donatien	0:632c9925f013	228	break;
donatien	0:632c9925f013	229
donatien	0:632c9925f013	230	case LS_CLOSED:
donatien	0:632c9925f013	231	if( f->flags & OPT_SILENT ) {
donatien	0:632c9925f013	232	f->state = LS_STOPPED;
donatien	0:632c9925f013	233	} else {
donatien	0:632c9925f013	234	/* Send an initial configure-request */
donatien	0:632c9925f013	235	fsm_sconfreq(f, 0);
donatien	0:632c9925f013	236	f->state = LS_REQSENT;
donatien	0:632c9925f013	237	}
donatien	0:632c9925f013	238	break;
donatien	0:632c9925f013	239
donatien	0:632c9925f013	240	case LS_CLOSING:
donatien	0:632c9925f013	241	f->state = LS_STOPPING;
donatien	0:632c9925f013	242	/* fall through */
donatien	0:632c9925f013	243	case LS_STOPPED:
donatien	0:632c9925f013	244	case LS_OPENED:
donatien	0:632c9925f013	245	if( f->flags & OPT_RESTART ) {
donatien	0:632c9925f013	246	fsm_lowerdown(f);
donatien	0:632c9925f013	247	fsm_lowerup(f);
donatien	0:632c9925f013	248	}
donatien	0:632c9925f013	249	break;
donatien	0:632c9925f013	250	}
donatien	0:632c9925f013	251
donatien	0:632c9925f013	252	FSMDEBUG(LOG_INFO, ("%s: open state %d (%s) -> %d (%s)\n",
donatien	0:632c9925f013	253	PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	254	}
donatien	0:632c9925f013	255
donatien	0:632c9925f013	256	#if 0 /* backport pppd 2.4.4b1; */
donatien	0:632c9925f013	257	/*
donatien	0:632c9925f013	258	* terminate_layer - Start process of shutting down the FSM
donatien	0:632c9925f013	259	*
donatien	0:632c9925f013	260	* Cancel any timeout running, notify upper layers we're done, and
donatien	0:632c9925f013	261	* send a terminate-request message as configured.
donatien	0:632c9925f013	262	*/
donatien	0:632c9925f013	263	static void
donatien	0:632c9925f013	264	terminate_layer(fsm *f, int nextstate)
donatien	0:632c9925f013	265	{
donatien	0:632c9925f013	266	/* @todo */
donatien	0:632c9925f013	267	}
donatien	0:632c9925f013	268	#endif
donatien	0:632c9925f013	269
donatien	0:632c9925f013	270	/*
donatien	0:632c9925f013	271	* fsm_close - Start closing connection.
donatien	0:632c9925f013	272	*
donatien	0:632c9925f013	273	* Cancel timeouts and either initiate close or possibly go directly to
donatien	0:632c9925f013	274	* the LS_CLOSED state.
donatien	0:632c9925f013	275	*/
donatien	0:632c9925f013	276	void
donatien	0:632c9925f013	277	fsm_close(fsm f, char reason)
donatien	0:632c9925f013	278	{
donatien	0:632c9925f013	279	#if PPP_DEBUG
donatien	0:632c9925f013	280	int oldState = f->state;
donatien	0:632c9925f013	281
donatien	0:632c9925f013	282	LWIP_UNUSED_ARG(oldState);
donatien	0:632c9925f013	283	#endif
donatien	0:632c9925f013	284
donatien	0:632c9925f013	285	f->term_reason = reason;
donatien	0:632c9925f013	286	f->term_reason_len = (reason == NULL ? 0 : (int)strlen(reason));
donatien	0:632c9925f013	287	switch( f->state ) {
donatien	0:632c9925f013	288	case LS_STARTING:
donatien	0:632c9925f013	289	f->state = LS_INITIAL;
donatien	0:632c9925f013	290	break;
donatien	0:632c9925f013	291	case LS_STOPPED:
donatien	0:632c9925f013	292	f->state = LS_CLOSED;
donatien	0:632c9925f013	293	break;
donatien	0:632c9925f013	294	case LS_STOPPING:
donatien	0:632c9925f013	295	f->state = LS_CLOSING;
donatien	0:632c9925f013	296	break;
donatien	0:632c9925f013	297
donatien	0:632c9925f013	298	case LS_REQSENT:
donatien	0:632c9925f013	299	case LS_ACKRCVD:
donatien	0:632c9925f013	300	case LS_ACKSENT:
donatien	0:632c9925f013	301	case LS_OPENED:
donatien	0:632c9925f013	302	if( f->state != LS_OPENED ) {
donatien	0:632c9925f013	303	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien	0:632c9925f013	304	} else if( f->callbacks->down ) {
donatien	0:632c9925f013	305	(f->callbacks->down)(f); / Inform upper layers we're down */
donatien	0:632c9925f013	306	}
donatien	0:632c9925f013	307	/* Init restart counter, send Terminate-Request */
donatien	0:632c9925f013	308	f->retransmits = f->maxtermtransmits;
donatien	0:632c9925f013	309	fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
donatien	0:632c9925f013	310	(u_char *) f->term_reason, f->term_reason_len);
donatien	0:632c9925f013	311	TIMEOUT(fsm_timeout, f, f->timeouttime);
donatien	0:632c9925f013	312	--f->retransmits;
donatien	0:632c9925f013	313
donatien	0:632c9925f013	314	f->state = LS_CLOSING;
donatien	0:632c9925f013	315	break;
donatien	0:632c9925f013	316	}
donatien	0:632c9925f013	317
donatien	0:632c9925f013	318	FSMDEBUG(LOG_INFO, ("%s: close reason=%s state %d (%s) -> %d (%s)\n",
donatien	0:632c9925f013	319	PROTO_NAME(f), reason, oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	320	}
donatien	0:632c9925f013	321
donatien	0:632c9925f013	322
donatien	0:632c9925f013	323	/*
donatien	0:632c9925f013	324	* fsm_timeout - Timeout expired.
donatien	0:632c9925f013	325	*/
donatien	0:632c9925f013	326	static void
donatien	0:632c9925f013	327	fsm_timeout(void *arg)
donatien	0:632c9925f013	328	{
donatien	0:632c9925f013	329	fsm f = (fsm ) arg;
donatien	0:632c9925f013	330
donatien	0:632c9925f013	331	switch (f->state) {
donatien	0:632c9925f013	332	case LS_CLOSING:
donatien	0:632c9925f013	333	case LS_STOPPING:
donatien	0:632c9925f013	334	if( f->retransmits <= 0 ) {
donatien	0:632c9925f013	335	FSMDEBUG(LOG_WARNING, ("%s: timeout sending Terminate-Request state=%d (%s)\n",
donatien	0:632c9925f013	336	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	337	/*
donatien	0:632c9925f013	338	* We've waited for an ack long enough. Peer probably heard us.
donatien	0:632c9925f013	339	*/
donatien	0:632c9925f013	340	f->state = (f->state == LS_CLOSING)? LS_CLOSED: LS_STOPPED;
donatien	0:632c9925f013	341	if( f->callbacks->finished ) {
donatien	0:632c9925f013	342	(*f->callbacks->finished)(f);
donatien	0:632c9925f013	343	}
donatien	0:632c9925f013	344	} else {
donatien	0:632c9925f013	345	FSMDEBUG(LOG_WARNING, ("%s: timeout resending Terminate-Requests state=%d (%s)\n",
donatien	0:632c9925f013	346	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	347	/* Send Terminate-Request */
donatien	0:632c9925f013	348	fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
donatien	0:632c9925f013	349	(u_char *) f->term_reason, f->term_reason_len);
donatien	0:632c9925f013	350	TIMEOUT(fsm_timeout, f, f->timeouttime);
donatien	0:632c9925f013	351	--f->retransmits;
donatien	0:632c9925f013	352	}
donatien	0:632c9925f013	353	break;
donatien	0:632c9925f013	354
donatien	0:632c9925f013	355	case LS_REQSENT:
donatien	0:632c9925f013	356	case LS_ACKRCVD:
donatien	0:632c9925f013	357	case LS_ACKSENT:
donatien	0:632c9925f013	358	if (f->retransmits <= 0) {
donatien	0:632c9925f013	359	FSMDEBUG(LOG_WARNING, ("%s: timeout sending Config-Requests state=%d (%s)\n",
donatien	0:632c9925f013	360	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	361	f->state = LS_STOPPED;
donatien	0:632c9925f013	362	if( (f->flags & OPT_PASSIVE) == 0 && f->callbacks->finished ) {
donatien	0:632c9925f013	363	(*f->callbacks->finished)(f);
donatien	0:632c9925f013	364	}
donatien	0:632c9925f013	365	} else {
donatien	0:632c9925f013	366	FSMDEBUG(LOG_WARNING, ("%s: timeout resending Config-Request state=%d (%s)\n",
donatien	0:632c9925f013	367	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	368	/* Retransmit the configure-request */
donatien	0:632c9925f013	369	if (f->callbacks->retransmit) {
donatien	0:632c9925f013	370	(*f->callbacks->retransmit)(f);
donatien	0:632c9925f013	371	}
donatien	0:632c9925f013	372	fsm_sconfreq(f, 1); /* Re-send Configure-Request */
donatien	0:632c9925f013	373	if( f->state == LS_ACKRCVD ) {
donatien	0:632c9925f013	374	f->state = LS_REQSENT;
donatien	0:632c9925f013	375	}
donatien	0:632c9925f013	376	}
donatien	0:632c9925f013	377	break;
donatien	0:632c9925f013	378
donatien	0:632c9925f013	379	default:
donatien	0:632c9925f013	380	FSMDEBUG(LOG_INFO, ("%s: UNHANDLED timeout event in state %d (%s)!\n",
donatien	0:632c9925f013	381	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	382	}
donatien	0:632c9925f013	383	}
donatien	0:632c9925f013	384
donatien	0:632c9925f013	385
donatien	0:632c9925f013	386	/*
donatien	0:632c9925f013	387	* fsm_input - Input packet.
donatien	0:632c9925f013	388	*/
donatien	0:632c9925f013	389	void
donatien	0:632c9925f013	390	fsm_input(fsm f, u_char inpacket, int l)
donatien	0:632c9925f013	391	{
donatien	0:632c9925f013	392	u_char *inp = inpacket;
donatien	0:632c9925f013	393	u_char code, id;
donatien	0:632c9925f013	394	int len;
donatien	0:632c9925f013	395
donatien	0:632c9925f013	396	/*
donatien	0:632c9925f013	397	* Parse header (code, id and length).
donatien	0:632c9925f013	398	* If packet too short, drop it.
donatien	0:632c9925f013	399	*/
donatien	0:632c9925f013	400	if (l < HEADERLEN) {
donatien	0:632c9925f013	401	FSMDEBUG(LOG_WARNING, ("fsm_input(%x): Rcvd short header.\n",
donatien	0:632c9925f013	402	f->protocol));
donatien	0:632c9925f013	403	return;
donatien	0:632c9925f013	404	}
donatien	0:632c9925f013	405	GETCHAR(code, inp);
donatien	0:632c9925f013	406	GETCHAR(id, inp);
donatien	0:632c9925f013	407	GETSHORT(len, inp);
donatien	0:632c9925f013	408	if (len < HEADERLEN) {
donatien	0:632c9925f013	409	FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd illegal length.\n",
donatien	0:632c9925f013	410	f->protocol));
donatien	0:632c9925f013	411	return;
donatien	0:632c9925f013	412	}
donatien	0:632c9925f013	413	if (len > l) {
donatien	0:632c9925f013	414	FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd short packet.\n",
donatien	0:632c9925f013	415	f->protocol));
donatien	0:632c9925f013	416	return;
donatien	0:632c9925f013	417	}
donatien	0:632c9925f013	418	len -= HEADERLEN; /* subtract header length */
donatien	0:632c9925f013	419
donatien	0:632c9925f013	420	if( f->state == LS_INITIAL \|\| f->state == LS_STARTING ) {
donatien	0:632c9925f013	421	FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd packet in state %d (%s).\n",
donatien	0:632c9925f013	422	f->protocol, f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	423	return;
donatien	0:632c9925f013	424	}
donatien	0:632c9925f013	425	FSMDEBUG(LOG_INFO, ("fsm_input(%s):%d,%d,%d\n", PROTO_NAME(f), code, id, l));
donatien	0:632c9925f013	426	/*
donatien	0:632c9925f013	427	* Action depends on code.
donatien	0:632c9925f013	428	*/
donatien	0:632c9925f013	429	switch (code) {
donatien	0:632c9925f013	430	case CONFREQ:
donatien	0:632c9925f013	431	fsm_rconfreq(f, id, inp, len);
donatien	0:632c9925f013	432	break;
donatien	0:632c9925f013	433
donatien	0:632c9925f013	434	case CONFACK:
donatien	0:632c9925f013	435	fsm_rconfack(f, id, inp, len);
donatien	0:632c9925f013	436	break;
donatien	0:632c9925f013	437
donatien	0:632c9925f013	438	case CONFNAK:
donatien	0:632c9925f013	439	case CONFREJ:
donatien	0:632c9925f013	440	fsm_rconfnakrej(f, code, id, inp, len);
donatien	0:632c9925f013	441	break;
donatien	0:632c9925f013	442
donatien	0:632c9925f013	443	case TERMREQ:
donatien	0:632c9925f013	444	fsm_rtermreq(f, id, inp, len);
donatien	0:632c9925f013	445	break;
donatien	0:632c9925f013	446
donatien	0:632c9925f013	447	case TERMACK:
donatien	0:632c9925f013	448	fsm_rtermack(f);
donatien	0:632c9925f013	449	break;
donatien	0:632c9925f013	450
donatien	0:632c9925f013	451	case CODEREJ:
donatien	0:632c9925f013	452	fsm_rcoderej(f, inp, len);
donatien	0:632c9925f013	453	break;
donatien	0:632c9925f013	454
donatien	0:632c9925f013	455	default:
donatien	0:632c9925f013	456	FSMDEBUG(LOG_INFO, ("fsm_input(%s): default: \n", PROTO_NAME(f)));
donatien	0:632c9925f013	457	if( !f->callbacks->extcode \|\|
donatien	0:632c9925f013	458	!(*f->callbacks->extcode)(f, code, id, inp, len) ) {
donatien	0:632c9925f013	459	fsm_sdata(f, CODEREJ, ++f->id, inpacket, len + HEADERLEN);
donatien	0:632c9925f013	460	}
donatien	0:632c9925f013	461	break;
donatien	0:632c9925f013	462	}
donatien	0:632c9925f013	463	}
donatien	0:632c9925f013	464
donatien	0:632c9925f013	465
donatien	0:632c9925f013	466	/*
donatien	0:632c9925f013	467	* fsm_rconfreq - Receive Configure-Request.
donatien	0:632c9925f013	468	*/
donatien	0:632c9925f013	469	static void
donatien	0:632c9925f013	470	fsm_rconfreq(fsm f, u_char id, u_char inp, int len)
donatien	0:632c9925f013	471	{
donatien	0:632c9925f013	472	int code, reject_if_disagree;
donatien	0:632c9925f013	473
donatien	0:632c9925f013	474	FSMDEBUG(LOG_INFO, ("fsm_rconfreq(%s): Rcvd id %d state=%d (%s)\n",
donatien	0:632c9925f013	475	PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	476	switch( f->state ) {
donatien	0:632c9925f013	477	case LS_CLOSED:
donatien	0:632c9925f013	478	/* Go away, we're closed */
donatien	0:632c9925f013	479	fsm_sdata(f, TERMACK, id, NULL, 0);
donatien	0:632c9925f013	480	return;
donatien	0:632c9925f013	481	case LS_CLOSING:
donatien	0:632c9925f013	482	case LS_STOPPING:
donatien	0:632c9925f013	483	return;
donatien	0:632c9925f013	484
donatien	0:632c9925f013	485	case LS_OPENED:
donatien	0:632c9925f013	486	/* Go down and restart negotiation */
donatien	0:632c9925f013	487	if( f->callbacks->down ) {
donatien	0:632c9925f013	488	(f->callbacks->down)(f); / Inform upper layers */
donatien	0:632c9925f013	489	}
donatien	0:632c9925f013	490	fsm_sconfreq(f, 0); /* Send initial Configure-Request */
donatien	0:632c9925f013	491	break;
donatien	0:632c9925f013	492
donatien	0:632c9925f013	493	case LS_STOPPED:
donatien	0:632c9925f013	494	/* Negotiation started by our peer */
donatien	0:632c9925f013	495	fsm_sconfreq(f, 0); /* Send initial Configure-Request */
donatien	0:632c9925f013	496	f->state = LS_REQSENT;
donatien	0:632c9925f013	497	break;
donatien	0:632c9925f013	498	}
donatien	0:632c9925f013	499
donatien	0:632c9925f013	500	/*
donatien	0:632c9925f013	501	* Pass the requested configuration options
donatien	0:632c9925f013	502	* to protocol-specific code for checking.
donatien	0:632c9925f013	503	*/
donatien	0:632c9925f013	504	if (f->callbacks->reqci) { /* Check CI */
donatien	0:632c9925f013	505	reject_if_disagree = (f->nakloops >= f->maxnakloops);
donatien	0:632c9925f013	506	code = (*f->callbacks->reqci)(f, inp, &len, reject_if_disagree);
donatien	0:632c9925f013	507	} else if (len) {
donatien	0:632c9925f013	508	code = CONFREJ; /* Reject all CI */
donatien	0:632c9925f013	509	} else {
donatien	0:632c9925f013	510	code = CONFACK;
donatien	0:632c9925f013	511	}
donatien	0:632c9925f013	512
donatien	0:632c9925f013	513	/* send the Ack, Nak or Rej to the peer */
donatien	0:632c9925f013	514	fsm_sdata(f, (u_char)code, id, inp, len);
donatien	0:632c9925f013	515
donatien	0:632c9925f013	516	if (code == CONFACK) {
donatien	0:632c9925f013	517	if (f->state == LS_ACKRCVD) {
donatien	0:632c9925f013	518	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien	0:632c9925f013	519	f->state = LS_OPENED;
donatien	0:632c9925f013	520	if (f->callbacks->up) {
donatien	0:632c9925f013	521	(f->callbacks->up)(f); / Inform upper layers */
donatien	0:632c9925f013	522	}
donatien	0:632c9925f013	523	} else {
donatien	0:632c9925f013	524	f->state = LS_ACKSENT;
donatien	0:632c9925f013	525	}
donatien	0:632c9925f013	526	f->nakloops = 0;
donatien	0:632c9925f013	527	} else {
donatien	0:632c9925f013	528	/* we sent CONFACK or CONFREJ */
donatien	0:632c9925f013	529	if (f->state != LS_ACKRCVD) {
donatien	0:632c9925f013	530	f->state = LS_REQSENT;
donatien	0:632c9925f013	531	}
donatien	0:632c9925f013	532	if( code == CONFNAK ) {
donatien	0:632c9925f013	533	++f->nakloops;
donatien	0:632c9925f013	534	}
donatien	0:632c9925f013	535	}
donatien	0:632c9925f013	536	}
donatien	0:632c9925f013	537
donatien	0:632c9925f013	538
donatien	0:632c9925f013	539	/*
donatien	0:632c9925f013	540	* fsm_rconfack - Receive Configure-Ack.
donatien	0:632c9925f013	541	*/
donatien	0:632c9925f013	542	static void
donatien	0:632c9925f013	543	fsm_rconfack(fsm f, int id, u_char inp, int len)
donatien	0:632c9925f013	544	{
donatien	0:632c9925f013	545	FSMDEBUG(LOG_INFO, ("fsm_rconfack(%s): Rcvd id %d state=%d (%s)\n",
donatien	0:632c9925f013	546	PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	547
donatien	0:632c9925f013	548	if (id != f->reqid \|\| f->seen_ack) { /* Expected id? */
donatien	0:632c9925f013	549	return; /* Nope, toss... */
donatien	0:632c9925f013	550	}
donatien	0:632c9925f013	551	if( !(f->callbacks->ackci? (*f->callbacks->ackci)(f, inp, len): (len == 0)) ) {
donatien	0:632c9925f013	552	/* Ack is bad - ignore it */
donatien	0:632c9925f013	553	FSMDEBUG(LOG_INFO, ("%s: received bad Ack (length %d)\n",
donatien	0:632c9925f013	554	PROTO_NAME(f), len));
donatien	0:632c9925f013	555	return;
donatien	0:632c9925f013	556	}
donatien	0:632c9925f013	557	f->seen_ack = 1;
donatien	0:632c9925f013	558
donatien	0:632c9925f013	559	switch (f->state) {
donatien	0:632c9925f013	560	case LS_CLOSED:
donatien	0:632c9925f013	561	case LS_STOPPED:
donatien	0:632c9925f013	562	fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
donatien	0:632c9925f013	563	break;
donatien	0:632c9925f013	564
donatien	0:632c9925f013	565	case LS_REQSENT:
donatien	0:632c9925f013	566	f->state = LS_ACKRCVD;
donatien	0:632c9925f013	567	f->retransmits = f->maxconfreqtransmits;
donatien	0:632c9925f013	568	break;
donatien	0:632c9925f013	569
donatien	0:632c9925f013	570	case LS_ACKRCVD:
donatien	0:632c9925f013	571	/* Huh? an extra valid Ack? oh well... */
donatien	0:632c9925f013	572	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien	0:632c9925f013	573	fsm_sconfreq(f, 0);
donatien	0:632c9925f013	574	f->state = LS_REQSENT;
donatien	0:632c9925f013	575	break;
donatien	0:632c9925f013	576
donatien	0:632c9925f013	577	case LS_ACKSENT:
donatien	0:632c9925f013	578	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien	0:632c9925f013	579	f->state = LS_OPENED;
donatien	0:632c9925f013	580	f->retransmits = f->maxconfreqtransmits;
donatien	0:632c9925f013	581	if (f->callbacks->up) {
donatien	0:632c9925f013	582	(f->callbacks->up)(f); / Inform upper layers */
donatien	0:632c9925f013	583	}
donatien	0:632c9925f013	584	break;
donatien	0:632c9925f013	585
donatien	0:632c9925f013	586	case LS_OPENED:
donatien	0:632c9925f013	587	/* Go down and restart negotiation */
donatien	0:632c9925f013	588	if (f->callbacks->down) {
donatien	0:632c9925f013	589	(f->callbacks->down)(f); / Inform upper layers */
donatien	0:632c9925f013	590	}
donatien	0:632c9925f013	591	fsm_sconfreq(f, 0); /* Send initial Configure-Request */
donatien	0:632c9925f013	592	f->state = LS_REQSENT;
donatien	0:632c9925f013	593	break;
donatien	0:632c9925f013	594	}
donatien	0:632c9925f013	595	}
donatien	0:632c9925f013	596
donatien	0:632c9925f013	597
donatien	0:632c9925f013	598	/*
donatien	0:632c9925f013	599	* fsm_rconfnakrej - Receive Configure-Nak or Configure-Reject.
donatien	0:632c9925f013	600	*/
donatien	0:632c9925f013	601	static void
donatien	0:632c9925f013	602	fsm_rconfnakrej(fsm f, int code, int id, u_char inp, int len)
donatien	0:632c9925f013	603	{
donatien	0:632c9925f013	604	int (proc) (fsm , u_char *, int);
donatien	0:632c9925f013	605	int ret;
donatien	0:632c9925f013	606
donatien	0:632c9925f013	607	FSMDEBUG(LOG_INFO, ("fsm_rconfnakrej(%s): Rcvd id %d state=%d (%s)\n",
donatien	0:632c9925f013	608	PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	609
donatien	0:632c9925f013	610	if (id != f->reqid \|\| f->seen_ack) { /* Expected id? */
donatien	0:632c9925f013	611	return; /* Nope, toss... */
donatien	0:632c9925f013	612	}
donatien	0:632c9925f013	613	proc = (code == CONFNAK)? f->callbacks->nakci: f->callbacks->rejci;
donatien	0:632c9925f013	614	if (!proc \|\| !((ret = proc(f, inp, len)))) {
donatien	0:632c9925f013	615	/* Nak/reject is bad - ignore it */
donatien	0:632c9925f013	616	FSMDEBUG(LOG_INFO, ("%s: received bad %s (length %d)\n",
donatien	0:632c9925f013	617	PROTO_NAME(f), (code==CONFNAK? "Nak": "reject"), len));
donatien	0:632c9925f013	618	return;
donatien	0:632c9925f013	619	}
donatien	0:632c9925f013	620	f->seen_ack = 1;
donatien	0:632c9925f013	621
donatien	0:632c9925f013	622	switch (f->state) {
donatien	0:632c9925f013	623	case LS_CLOSED:
donatien	0:632c9925f013	624	case LS_STOPPED:
donatien	0:632c9925f013	625	fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
donatien	0:632c9925f013	626	break;
donatien	0:632c9925f013	627
donatien	0:632c9925f013	628	case LS_REQSENT:
donatien	0:632c9925f013	629	case LS_ACKSENT:
donatien	0:632c9925f013	630	/* They didn't agree to what we wanted - try another request */
donatien	0:632c9925f013	631	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien	0:632c9925f013	632	if (ret < 0) {
donatien	0:632c9925f013	633	f->state = LS_STOPPED; /* kludge for stopping CCP */
donatien	0:632c9925f013	634	} else {
donatien	0:632c9925f013	635	fsm_sconfreq(f, 0); /* Send Configure-Request */
donatien	0:632c9925f013	636	}
donatien	0:632c9925f013	637	break;
donatien	0:632c9925f013	638
donatien	0:632c9925f013	639	case LS_ACKRCVD:
donatien	0:632c9925f013	640	/* Got a Nak/reject when we had already had an Ack?? oh well... */
donatien	0:632c9925f013	641	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien	0:632c9925f013	642	fsm_sconfreq(f, 0);
donatien	0:632c9925f013	643	f->state = LS_REQSENT;
donatien	0:632c9925f013	644	break;
donatien	0:632c9925f013	645
donatien	0:632c9925f013	646	case LS_OPENED:
donatien	0:632c9925f013	647	/* Go down and restart negotiation */
donatien	0:632c9925f013	648	if (f->callbacks->down) {
donatien	0:632c9925f013	649	(f->callbacks->down)(f); / Inform upper layers */
donatien	0:632c9925f013	650	}
donatien	0:632c9925f013	651	fsm_sconfreq(f, 0); /* Send initial Configure-Request */
donatien	0:632c9925f013	652	f->state = LS_REQSENT;
donatien	0:632c9925f013	653	break;
donatien	0:632c9925f013	654	}
donatien	0:632c9925f013	655	}
donatien	0:632c9925f013	656
donatien	0:632c9925f013	657
donatien	0:632c9925f013	658	/*
donatien	0:632c9925f013	659	* fsm_rtermreq - Receive Terminate-Req.
donatien	0:632c9925f013	660	*/
donatien	0:632c9925f013	661	static void
donatien	0:632c9925f013	662	fsm_rtermreq(fsm f, int id, u_char p, int len)
donatien	0:632c9925f013	663	{
donatien	0:632c9925f013	664	LWIP_UNUSED_ARG(p);
donatien	0:632c9925f013	665
donatien	0:632c9925f013	666	FSMDEBUG(LOG_INFO, ("fsm_rtermreq(%s): Rcvd id %d state=%d (%s)\n",
donatien	0:632c9925f013	667	PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	668
donatien	0:632c9925f013	669	switch (f->state) {
donatien	0:632c9925f013	670	case LS_ACKRCVD:
donatien	0:632c9925f013	671	case LS_ACKSENT:
donatien	0:632c9925f013	672	f->state = LS_REQSENT; /* Start over but keep trying */
donatien	0:632c9925f013	673	break;
donatien	0:632c9925f013	674
donatien	0:632c9925f013	675	case LS_OPENED:
donatien	0:632c9925f013	676	if (len > 0) {
donatien	0:632c9925f013	677	FSMDEBUG(LOG_INFO, ("%s terminated by peer (%p)\n", PROTO_NAME(f), p));
donatien	0:632c9925f013	678	} else {
donatien	0:632c9925f013	679	FSMDEBUG(LOG_INFO, ("%s terminated by peer\n", PROTO_NAME(f)));
donatien	0:632c9925f013	680	}
donatien	0:632c9925f013	681	if (f->callbacks->down) {
donatien	0:632c9925f013	682	(f->callbacks->down)(f); / Inform upper layers */
donatien	0:632c9925f013	683	}
donatien	0:632c9925f013	684	f->retransmits = 0;
donatien	0:632c9925f013	685	f->state = LS_STOPPING;
donatien	0:632c9925f013	686	TIMEOUT(fsm_timeout, f, f->timeouttime);
donatien	0:632c9925f013	687	break;
donatien	0:632c9925f013	688	}
donatien	0:632c9925f013	689
donatien	0:632c9925f013	690	fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
donatien	0:632c9925f013	691	}
donatien	0:632c9925f013	692
donatien	0:632c9925f013	693
donatien	0:632c9925f013	694	/*
donatien	0:632c9925f013	695	* fsm_rtermack - Receive Terminate-Ack.
donatien	0:632c9925f013	696	*/
donatien	0:632c9925f013	697	static void
donatien	0:632c9925f013	698	fsm_rtermack(fsm *f)
donatien	0:632c9925f013	699	{
donatien	0:632c9925f013	700	FSMDEBUG(LOG_INFO, ("fsm_rtermack(%s): state=%d (%s)\n",
donatien	0:632c9925f013	701	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	702
donatien	0:632c9925f013	703	switch (f->state) {
donatien	0:632c9925f013	704	case LS_CLOSING:
donatien	0:632c9925f013	705	UNTIMEOUT(fsm_timeout, f);
donatien	0:632c9925f013	706	f->state = LS_CLOSED;
donatien	0:632c9925f013	707	if( f->callbacks->finished ) {
donatien	0:632c9925f013	708	(*f->callbacks->finished)(f);
donatien	0:632c9925f013	709	}
donatien	0:632c9925f013	710	break;
donatien	0:632c9925f013	711
donatien	0:632c9925f013	712	case LS_STOPPING:
donatien	0:632c9925f013	713	UNTIMEOUT(fsm_timeout, f);
donatien	0:632c9925f013	714	f->state = LS_STOPPED;
donatien	0:632c9925f013	715	if( f->callbacks->finished ) {
donatien	0:632c9925f013	716	(*f->callbacks->finished)(f);
donatien	0:632c9925f013	717	}
donatien	0:632c9925f013	718	break;
donatien	0:632c9925f013	719
donatien	0:632c9925f013	720	case LS_ACKRCVD:
donatien	0:632c9925f013	721	f->state = LS_REQSENT;
donatien	0:632c9925f013	722	break;
donatien	0:632c9925f013	723
donatien	0:632c9925f013	724	case LS_OPENED:
donatien	0:632c9925f013	725	if (f->callbacks->down) {
donatien	0:632c9925f013	726	(f->callbacks->down)(f); / Inform upper layers */
donatien	0:632c9925f013	727	}
donatien	0:632c9925f013	728	fsm_sconfreq(f, 0);
donatien	0:632c9925f013	729	break;
donatien	0:632c9925f013	730	default:
donatien	0:632c9925f013	731	FSMDEBUG(LOG_INFO, ("fsm_rtermack(%s): UNHANDLED state=%d (%s)!!!\n",
donatien	0:632c9925f013	732	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	733	}
donatien	0:632c9925f013	734	}
donatien	0:632c9925f013	735
donatien	0:632c9925f013	736
donatien	0:632c9925f013	737	/*
donatien	0:632c9925f013	738	* fsm_rcoderej - Receive an Code-Reject.
donatien	0:632c9925f013	739	*/
donatien	0:632c9925f013	740	static void
donatien	0:632c9925f013	741	fsm_rcoderej(fsm f, u_char inp, int len)
donatien	0:632c9925f013	742	{
donatien	0:632c9925f013	743	u_char code, id;
donatien	0:632c9925f013	744
donatien	0:632c9925f013	745	FSMDEBUG(LOG_INFO, ("fsm_rcoderej(%s): state=%d (%s)\n",
donatien	0:632c9925f013	746	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	747
donatien	0:632c9925f013	748	if (len < HEADERLEN) {
donatien	0:632c9925f013	749	FSMDEBUG(LOG_INFO, ("fsm_rcoderej: Rcvd short Code-Reject packet!\n"));
donatien	0:632c9925f013	750	return;
donatien	0:632c9925f013	751	}
donatien	0:632c9925f013	752	GETCHAR(code, inp);
donatien	0:632c9925f013	753	GETCHAR(id, inp);
donatien	0:632c9925f013	754	FSMDEBUG(LOG_WARNING, ("%s: Rcvd Code-Reject for code %d, id %d\n",
donatien	0:632c9925f013	755	PROTO_NAME(f), code, id));
donatien	0:632c9925f013	756
donatien	0:632c9925f013	757	if( f->state == LS_ACKRCVD ) {
donatien	0:632c9925f013	758	f->state = LS_REQSENT;
donatien	0:632c9925f013	759	}
donatien	0:632c9925f013	760	}
donatien	0:632c9925f013	761
donatien	0:632c9925f013	762
donatien	0:632c9925f013	763	/*
donatien	0:632c9925f013	764	* fsm_protreject - Peer doesn't speak this protocol.
donatien	0:632c9925f013	765	*
donatien	0:632c9925f013	766	* Treat this as a catastrophic error (RXJ-).
donatien	0:632c9925f013	767	*/
donatien	0:632c9925f013	768	void
donatien	0:632c9925f013	769	fsm_protreject(fsm *f)
donatien	0:632c9925f013	770	{
donatien	0:632c9925f013	771	switch( f->state ) {
donatien	0:632c9925f013	772	case LS_CLOSING:
donatien	0:632c9925f013	773	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien	0:632c9925f013	774	/* fall through */
donatien	0:632c9925f013	775	case LS_CLOSED:
donatien	0:632c9925f013	776	f->state = LS_CLOSED;
donatien	0:632c9925f013	777	if( f->callbacks->finished ) {
donatien	0:632c9925f013	778	(*f->callbacks->finished)(f);
donatien	0:632c9925f013	779	}
donatien	0:632c9925f013	780	break;
donatien	0:632c9925f013	781
donatien	0:632c9925f013	782	case LS_STOPPING:
donatien	0:632c9925f013	783	case LS_REQSENT:
donatien	0:632c9925f013	784	case LS_ACKRCVD:
donatien	0:632c9925f013	785	case LS_ACKSENT:
donatien	0:632c9925f013	786	UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien	0:632c9925f013	787	/* fall through */
donatien	0:632c9925f013	788	case LS_STOPPED:
donatien	0:632c9925f013	789	f->state = LS_STOPPED;
donatien	0:632c9925f013	790	if( f->callbacks->finished ) {
donatien	0:632c9925f013	791	(*f->callbacks->finished)(f);
donatien	0:632c9925f013	792	}
donatien	0:632c9925f013	793	break;
donatien	0:632c9925f013	794
donatien	0:632c9925f013	795	case LS_OPENED:
donatien	0:632c9925f013	796	if( f->callbacks->down ) {
donatien	0:632c9925f013	797	(*f->callbacks->down)(f);
donatien	0:632c9925f013	798	}
donatien	0:632c9925f013	799	/* Init restart counter, send Terminate-Request */
donatien	0:632c9925f013	800	f->retransmits = f->maxtermtransmits;
donatien	0:632c9925f013	801	fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
donatien	0:632c9925f013	802	(u_char *) f->term_reason, f->term_reason_len);
donatien	0:632c9925f013	803	TIMEOUT(fsm_timeout, f, f->timeouttime);
donatien	0:632c9925f013	804	--f->retransmits;
donatien	0:632c9925f013	805
donatien	0:632c9925f013	806	f->state = LS_STOPPING;
donatien	0:632c9925f013	807	break;
donatien	0:632c9925f013	808
donatien	0:632c9925f013	809	default:
donatien	0:632c9925f013	810	FSMDEBUG(LOG_INFO, ("%s: Protocol-reject event in state %d (%s)!\n",
donatien	0:632c9925f013	811	PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien	0:632c9925f013	812	}
donatien	0:632c9925f013	813	}
donatien	0:632c9925f013	814
donatien	0:632c9925f013	815
donatien	0:632c9925f013	816	/*
donatien	0:632c9925f013	817	* fsm_sconfreq - Send a Configure-Request.
donatien	0:632c9925f013	818	*/
donatien	0:632c9925f013	819	static void
donatien	0:632c9925f013	820	fsm_sconfreq(fsm *f, int retransmit)
donatien	0:632c9925f013	821	{
donatien	0:632c9925f013	822	u_char *outp;
donatien	0:632c9925f013	823	int cilen;
donatien	0:632c9925f013	824
donatien	0:632c9925f013	825	if( f->state != LS_REQSENT && f->state != LS_ACKRCVD && f->state != LS_ACKSENT ) {
donatien	0:632c9925f013	826	/* Not currently negotiating - reset options */
donatien	0:632c9925f013	827	if( f->callbacks->resetci ) {
donatien	0:632c9925f013	828	(*f->callbacks->resetci)(f);
donatien	0:632c9925f013	829	}
donatien	0:632c9925f013	830	f->nakloops = 0;
donatien	0:632c9925f013	831	}
donatien	0:632c9925f013	832
donatien	0:632c9925f013	833	if( !retransmit ) {
donatien	0:632c9925f013	834	/* New request - reset retransmission counter, use new ID */
donatien	0:632c9925f013	835	f->retransmits = f->maxconfreqtransmits;
donatien	0:632c9925f013	836	f->reqid = ++f->id;
donatien	0:632c9925f013	837	}
donatien	0:632c9925f013	838
donatien	0:632c9925f013	839	f->seen_ack = 0;
donatien	0:632c9925f013	840
donatien	0:632c9925f013	841	/*
donatien	0:632c9925f013	842	* Make up the request packet
donatien	0:632c9925f013	843	*/
donatien	0:632c9925f013	844	outp = outpacket_buf[f->unit] + PPP_HDRLEN + HEADERLEN;
donatien	0:632c9925f013	845	if( f->callbacks->cilen && f->callbacks->addci ) {
donatien	0:632c9925f013	846	cilen = (*f->callbacks->cilen)(f);
donatien	0:632c9925f013	847	if( cilen > peer_mru[f->unit] - (int)HEADERLEN ) {
donatien	0:632c9925f013	848	cilen = peer_mru[f->unit] - HEADERLEN;
donatien	0:632c9925f013	849	}
donatien	0:632c9925f013	850	if (f->callbacks->addci) {
donatien	0:632c9925f013	851	(*f->callbacks->addci)(f, outp, &cilen);
donatien	0:632c9925f013	852	}
donatien	0:632c9925f013	853	} else {
donatien	0:632c9925f013	854	cilen = 0;
donatien	0:632c9925f013	855	}
donatien	0:632c9925f013	856
donatien	0:632c9925f013	857	/* send the request to our peer */
donatien	0:632c9925f013	858	fsm_sdata(f, CONFREQ, f->reqid, outp, cilen);
donatien	0:632c9925f013	859
donatien	0:632c9925f013	860	/* start the retransmit timer */
donatien	0:632c9925f013	861	--f->retransmits;
donatien	0:632c9925f013	862	TIMEOUT(fsm_timeout, f, f->timeouttime);
donatien	0:632c9925f013	863
donatien	0:632c9925f013	864	FSMDEBUG(LOG_INFO, ("%s: sending Configure-Request, id %d\n",
donatien	0:632c9925f013	865	PROTO_NAME(f), f->reqid));
donatien	0:632c9925f013	866	}
donatien	0:632c9925f013	867
donatien	0:632c9925f013	868
donatien	0:632c9925f013	869	/*
donatien	0:632c9925f013	870	* fsm_sdata - Send some data.
donatien	0:632c9925f013	871	*
donatien	0:632c9925f013	872	* Used for all packets sent to our peer by this module.
donatien	0:632c9925f013	873	*/
donatien	0:632c9925f013	874	void
donatien	0:632c9925f013	875	fsm_sdata( fsm f, u_char code, u_char id, u_char data, int datalen)
donatien	0:632c9925f013	876	{
donatien	0:632c9925f013	877	u_char *outp;
donatien	0:632c9925f013	878	int outlen;
donatien	0:632c9925f013	879
donatien	0:632c9925f013	880	/* Adjust length to be smaller than MTU */
donatien	0:632c9925f013	881	outp = outpacket_buf[f->unit];
donatien	0:632c9925f013	882	if (datalen > peer_mru[f->unit] - (int)HEADERLEN) {
donatien	0:632c9925f013	883	datalen = peer_mru[f->unit] - HEADERLEN;
donatien	0:632c9925f013	884	}
donatien	0:632c9925f013	885	if (datalen && data != outp + PPP_HDRLEN + HEADERLEN) {
donatien	0:632c9925f013	886	BCOPY(data, outp + PPP_HDRLEN + HEADERLEN, datalen);
donatien	0:632c9925f013	887	}
donatien	0:632c9925f013	888	outlen = datalen + HEADERLEN;
donatien	0:632c9925f013	889	MAKEHEADER(outp, f->protocol);
donatien	0:632c9925f013	890	PUTCHAR(code, outp);
donatien	0:632c9925f013	891	PUTCHAR(id, outp);
donatien	0:632c9925f013	892	PUTSHORT(outlen, outp);
donatien	0:632c9925f013	893	pppWrite(f->unit, outpacket_buf[f->unit], outlen + PPP_HDRLEN);
donatien	0:632c9925f013	894	FSMDEBUG(LOG_INFO, ("fsm_sdata(%s): Sent code %d,%d,%d.\n",
donatien	0:632c9925f013	895	PROTO_NAME(f), code, id, outlen));
donatien	0:632c9925f013	896	}
donatien	0:632c9925f013	897
donatien	0:632c9925f013	898	#endif /* PPP_SUPPORT */

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Type:	Library
Created:	31 Dec 2013
Imports:	1
Forks:	0
Commits:	13
Dependents:	1
Dependencies:	0
Followers:	1

This repository is Public (Unlisted).

lwip/netif/ppp/fsm.c@4:fd826cad83c0, 2010-07-09 (annotated)

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