SiSK / EthernetInterface

fdsf

Dependents:   sisk_proj_stat MQTT Hello_FXOS8700Q WireFSHandControl ... more

lwip/netif/ppp/fsm.c@0:d7bd7384a37c, 2016-12-07 (annotated)

Committer:
grzemich
Date:
Wed Dec 07 23:47:50 2016 +0000
Revision:
0:d7bd7384a37c
dgd

Who changed what in which revision?

UserRevisionLine numberNew contents of line
grzemich 0:d7bd7384a37c 1 /*****************************************************************************
grzemich 0:d7bd7384a37c 2 * fsm.c - Network Control Protocol Finite State Machine program file.
grzemich 0:d7bd7384a37c 3 *
grzemich 0:d7bd7384a37c 4 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
grzemich 0:d7bd7384a37c 5 * portions Copyright (c) 1997 by Global Election Systems Inc.
grzemich 0:d7bd7384a37c 6 *
grzemich 0:d7bd7384a37c 7 * The authors hereby grant permission to use, copy, modify, distribute,
grzemich 0:d7bd7384a37c 8 * and license this software and its documentation for any purpose, provided
grzemich 0:d7bd7384a37c 9 * that existing copyright notices are retained in all copies and that this
grzemich 0:d7bd7384a37c 10 * notice and the following disclaimer are included verbatim in any
grzemich 0:d7bd7384a37c 11 * distributions. No written agreement, license, or royalty fee is required
grzemich 0:d7bd7384a37c 12 * for any of the authorized uses.
grzemich 0:d7bd7384a37c 13 *
grzemich 0:d7bd7384a37c 14 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
grzemich 0:d7bd7384a37c 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
grzemich 0:d7bd7384a37c 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
grzemich 0:d7bd7384a37c 17 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
grzemich 0:d7bd7384a37c 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
grzemich 0:d7bd7384a37c 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
grzemich 0:d7bd7384a37c 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
grzemich 0:d7bd7384a37c 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
grzemich 0:d7bd7384a37c 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
grzemich 0:d7bd7384a37c 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
grzemich 0:d7bd7384a37c 24 *
grzemich 0:d7bd7384a37c 25 ******************************************************************************
grzemich 0:d7bd7384a37c 26 * REVISION HISTORY
grzemich 0:d7bd7384a37c 27 *
grzemich 0:d7bd7384a37c 28 * 03-01-01 Marc Boucher <marc@mbsi.ca>
grzemich 0:d7bd7384a37c 29 * Ported to lwIP.
grzemich 0:d7bd7384a37c 30 * 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
grzemich 0:d7bd7384a37c 31 * Original based on BSD fsm.c.
grzemich 0:d7bd7384a37c 32 *****************************************************************************/
grzemich 0:d7bd7384a37c 33 /*
grzemich 0:d7bd7384a37c 34 * fsm.c - {Link, IP} Control Protocol Finite State Machine.
grzemich 0:d7bd7384a37c 35 *
grzemich 0:d7bd7384a37c 36 * Copyright (c) 1989 Carnegie Mellon University.
grzemich 0:d7bd7384a37c 37 * All rights reserved.
grzemich 0:d7bd7384a37c 38 *
grzemich 0:d7bd7384a37c 39 * Redistribution and use in source and binary forms are permitted
grzemich 0:d7bd7384a37c 40 * provided that the above copyright notice and this paragraph are
grzemich 0:d7bd7384a37c 41 * duplicated in all such forms and that any documentation,
grzemich 0:d7bd7384a37c 42 * advertising materials, and other materials related to such
grzemich 0:d7bd7384a37c 43 * distribution and use acknowledge that the software was developed
grzemich 0:d7bd7384a37c 44 * by Carnegie Mellon University. The name of the
grzemich 0:d7bd7384a37c 45 * University may not be used to endorse or promote products derived
grzemich 0:d7bd7384a37c 46 * from this software without specific prior written permission.
grzemich 0:d7bd7384a37c 47 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
grzemich 0:d7bd7384a37c 48 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
grzemich 0:d7bd7384a37c 49 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
grzemich 0:d7bd7384a37c 50 */
grzemich 0:d7bd7384a37c 51
grzemich 0:d7bd7384a37c 52 /*
grzemich 0:d7bd7384a37c 53 * TODO:
grzemich 0:d7bd7384a37c 54 * Randomize fsm id on link/init.
grzemich 0:d7bd7384a37c 55 * Deal with variable outgoing MTU.
grzemich 0:d7bd7384a37c 56 */
grzemich 0:d7bd7384a37c 57
grzemich 0:d7bd7384a37c 58 #include "lwip/opt.h"
grzemich 0:d7bd7384a37c 59
grzemich 0:d7bd7384a37c 60 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
grzemich 0:d7bd7384a37c 61
grzemich 0:d7bd7384a37c 62 #include "ppp.h"
grzemich 0:d7bd7384a37c 63 #include "pppdebug.h"
grzemich 0:d7bd7384a37c 64
grzemich 0:d7bd7384a37c 65 #include "fsm.h"
grzemich 0:d7bd7384a37c 66
grzemich 0:d7bd7384a37c 67 #include <string.h>
grzemich 0:d7bd7384a37c 68
grzemich 0:d7bd7384a37c 69 #if PPP_DEBUG
grzemich 0:d7bd7384a37c 70 static const char *ppperr_strerr[] = {
grzemich 0:d7bd7384a37c 71 "LS_INITIAL", /* LS_INITIAL 0 */
grzemich 0:d7bd7384a37c 72 "LS_STARTING", /* LS_STARTING 1 */
grzemich 0:d7bd7384a37c 73 "LS_CLOSED", /* LS_CLOSED 2 */
grzemich 0:d7bd7384a37c 74 "LS_STOPPED", /* LS_STOPPED 3 */
grzemich 0:d7bd7384a37c 75 "LS_CLOSING", /* LS_CLOSING 4 */
grzemich 0:d7bd7384a37c 76 "LS_STOPPING", /* LS_STOPPING 5 */
grzemich 0:d7bd7384a37c 77 "LS_REQSENT", /* LS_REQSENT 6 */
grzemich 0:d7bd7384a37c 78 "LS_ACKRCVD", /* LS_ACKRCVD 7 */
grzemich 0:d7bd7384a37c 79 "LS_ACKSENT", /* LS_ACKSENT 8 */
grzemich 0:d7bd7384a37c 80 "LS_OPENED" /* LS_OPENED 9 */
grzemich 0:d7bd7384a37c 81 };
grzemich 0:d7bd7384a37c 82 #endif /* PPP_DEBUG */
grzemich 0:d7bd7384a37c 83
grzemich 0:d7bd7384a37c 84 static void fsm_timeout (void *);
grzemich 0:d7bd7384a37c 85 static void fsm_rconfreq (fsm *, u_char, u_char *, int);
grzemich 0:d7bd7384a37c 86 static void fsm_rconfack (fsm *, int, u_char *, int);
grzemich 0:d7bd7384a37c 87 static void fsm_rconfnakrej (fsm *, int, int, u_char *, int);
grzemich 0:d7bd7384a37c 88 static void fsm_rtermreq (fsm *, int, u_char *, int);
grzemich 0:d7bd7384a37c 89 static void fsm_rtermack (fsm *);
grzemich 0:d7bd7384a37c 90 static void fsm_rcoderej (fsm *, u_char *, int);
grzemich 0:d7bd7384a37c 91 static void fsm_sconfreq (fsm *, int);
grzemich 0:d7bd7384a37c 92
grzemich 0:d7bd7384a37c 93 #define PROTO_NAME(f) ((f)->callbacks->proto_name)
grzemich 0:d7bd7384a37c 94
grzemich 0:d7bd7384a37c 95 int peer_mru[NUM_PPP];
grzemich 0:d7bd7384a37c 96
grzemich 0:d7bd7384a37c 97
grzemich 0:d7bd7384a37c 98 /*
grzemich 0:d7bd7384a37c 99 * fsm_init - Initialize fsm.
grzemich 0:d7bd7384a37c 100 *
grzemich 0:d7bd7384a37c 101 * Initialize fsm state.
grzemich 0:d7bd7384a37c 102 */
grzemich 0:d7bd7384a37c 103 void
grzemich 0:d7bd7384a37c 104 fsm_init(fsm *f)
grzemich 0:d7bd7384a37c 105 {
grzemich 0:d7bd7384a37c 106 f->state = LS_INITIAL;
grzemich 0:d7bd7384a37c 107 f->flags = 0;
grzemich 0:d7bd7384a37c 108 f->id = 0; /* XXX Start with random id? */
grzemich 0:d7bd7384a37c 109 f->timeouttime = FSM_DEFTIMEOUT;
grzemich 0:d7bd7384a37c 110 f->maxconfreqtransmits = FSM_DEFMAXCONFREQS;
grzemich 0:d7bd7384a37c 111 f->maxtermtransmits = FSM_DEFMAXTERMREQS;
grzemich 0:d7bd7384a37c 112 f->maxnakloops = FSM_DEFMAXNAKLOOPS;
grzemich 0:d7bd7384a37c 113 f->term_reason_len = 0;
grzemich 0:d7bd7384a37c 114 }
grzemich 0:d7bd7384a37c 115
grzemich 0:d7bd7384a37c 116
grzemich 0:d7bd7384a37c 117 /*
grzemich 0:d7bd7384a37c 118 * fsm_lowerup - The lower layer is up.
grzemich 0:d7bd7384a37c 119 */
grzemich 0:d7bd7384a37c 120 void
grzemich 0:d7bd7384a37c 121 fsm_lowerup(fsm *f)
grzemich 0:d7bd7384a37c 122 {
grzemich 0:d7bd7384a37c 123 int oldState = f->state;
grzemich 0:d7bd7384a37c 124
grzemich 0:d7bd7384a37c 125 LWIP_UNUSED_ARG(oldState);
grzemich 0:d7bd7384a37c 126
grzemich 0:d7bd7384a37c 127 switch( f->state ) {
grzemich 0:d7bd7384a37c 128 case LS_INITIAL:
grzemich 0:d7bd7384a37c 129 f->state = LS_CLOSED;
grzemich 0:d7bd7384a37c 130 break;
grzemich 0:d7bd7384a37c 131
grzemich 0:d7bd7384a37c 132 case LS_STARTING:
grzemich 0:d7bd7384a37c 133 if( f->flags & OPT_SILENT ) {
grzemich 0:d7bd7384a37c 134 f->state = LS_STOPPED;
grzemich 0:d7bd7384a37c 135 } else {
grzemich 0:d7bd7384a37c 136 /* Send an initial configure-request */
grzemich 0:d7bd7384a37c 137 fsm_sconfreq(f, 0);
grzemich 0:d7bd7384a37c 138 f->state = LS_REQSENT;
grzemich 0:d7bd7384a37c 139 }
grzemich 0:d7bd7384a37c 140 break;
grzemich 0:d7bd7384a37c 141
grzemich 0:d7bd7384a37c 142 default:
grzemich 0:d7bd7384a37c 143 FSMDEBUG(LOG_INFO, ("%s: Up event in state %d (%s)!\n",
grzemich 0:d7bd7384a37c 144 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 145 }
grzemich 0:d7bd7384a37c 146
grzemich 0:d7bd7384a37c 147 FSMDEBUG(LOG_INFO, ("%s: lowerup state %d (%s) -> %d (%s)\n",
grzemich 0:d7bd7384a37c 148 PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 149 }
grzemich 0:d7bd7384a37c 150
grzemich 0:d7bd7384a37c 151
grzemich 0:d7bd7384a37c 152 /*
grzemich 0:d7bd7384a37c 153 * fsm_lowerdown - The lower layer is down.
grzemich 0:d7bd7384a37c 154 *
grzemich 0:d7bd7384a37c 155 * Cancel all timeouts and inform upper layers.
grzemich 0:d7bd7384a37c 156 */
grzemich 0:d7bd7384a37c 157 void
grzemich 0:d7bd7384a37c 158 fsm_lowerdown(fsm *f)
grzemich 0:d7bd7384a37c 159 {
grzemich 0:d7bd7384a37c 160 int oldState = f->state;
grzemich 0:d7bd7384a37c 161
grzemich 0:d7bd7384a37c 162 LWIP_UNUSED_ARG(oldState);
grzemich 0:d7bd7384a37c 163
grzemich 0:d7bd7384a37c 164 switch( f->state ) {
grzemich 0:d7bd7384a37c 165 case LS_CLOSED:
grzemich 0:d7bd7384a37c 166 f->state = LS_INITIAL;
grzemich 0:d7bd7384a37c 167 break;
grzemich 0:d7bd7384a37c 168
grzemich 0:d7bd7384a37c 169 case LS_STOPPED:
grzemich 0:d7bd7384a37c 170 f->state = LS_STARTING;
grzemich 0:d7bd7384a37c 171 if( f->callbacks->starting ) {
grzemich 0:d7bd7384a37c 172 (*f->callbacks->starting)(f);
grzemich 0:d7bd7384a37c 173 }
grzemich 0:d7bd7384a37c 174 break;
grzemich 0:d7bd7384a37c 175
grzemich 0:d7bd7384a37c 176 case LS_CLOSING:
grzemich 0:d7bd7384a37c 177 f->state = LS_INITIAL;
grzemich 0:d7bd7384a37c 178 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
grzemich 0:d7bd7384a37c 179 break;
grzemich 0:d7bd7384a37c 180
grzemich 0:d7bd7384a37c 181 case LS_STOPPING:
grzemich 0:d7bd7384a37c 182 case LS_REQSENT:
grzemich 0:d7bd7384a37c 183 case LS_ACKRCVD:
grzemich 0:d7bd7384a37c 184 case LS_ACKSENT:
grzemich 0:d7bd7384a37c 185 f->state = LS_STARTING;
grzemich 0:d7bd7384a37c 186 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
grzemich 0:d7bd7384a37c 187 break;
grzemich 0:d7bd7384a37c 188
grzemich 0:d7bd7384a37c 189 case LS_OPENED:
grzemich 0:d7bd7384a37c 190 if( f->callbacks->down ) {
grzemich 0:d7bd7384a37c 191 (*f->callbacks->down)(f);
grzemich 0:d7bd7384a37c 192 }
grzemich 0:d7bd7384a37c 193 f->state = LS_STARTING;
grzemich 0:d7bd7384a37c 194 break;
grzemich 0:d7bd7384a37c 195
grzemich 0:d7bd7384a37c 196 default:
grzemich 0:d7bd7384a37c 197 FSMDEBUG(LOG_INFO, ("%s: Down event in state %d (%s)!\n",
grzemich 0:d7bd7384a37c 198 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 199 }
grzemich 0:d7bd7384a37c 200
grzemich 0:d7bd7384a37c 201 FSMDEBUG(LOG_INFO, ("%s: lowerdown state %d (%s) -> %d (%s)\n",
grzemich 0:d7bd7384a37c 202 PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 203 }
grzemich 0:d7bd7384a37c 204
grzemich 0:d7bd7384a37c 205
grzemich 0:d7bd7384a37c 206 /*
grzemich 0:d7bd7384a37c 207 * fsm_open - Link is allowed to come up.
grzemich 0:d7bd7384a37c 208 */
grzemich 0:d7bd7384a37c 209 void
grzemich 0:d7bd7384a37c 210 fsm_open(fsm *f)
grzemich 0:d7bd7384a37c 211 {
grzemich 0:d7bd7384a37c 212 int oldState = f->state;
grzemich 0:d7bd7384a37c 213
grzemich 0:d7bd7384a37c 214 LWIP_UNUSED_ARG(oldState);
grzemich 0:d7bd7384a37c 215
grzemich 0:d7bd7384a37c 216 switch( f->state ) {
grzemich 0:d7bd7384a37c 217 case LS_INITIAL:
grzemich 0:d7bd7384a37c 218 f->state = LS_STARTING;
grzemich 0:d7bd7384a37c 219 if( f->callbacks->starting ) {
grzemich 0:d7bd7384a37c 220 (*f->callbacks->starting)(f);
grzemich 0:d7bd7384a37c 221 }
grzemich 0:d7bd7384a37c 222 break;
grzemich 0:d7bd7384a37c 223
grzemich 0:d7bd7384a37c 224 case LS_CLOSED:
grzemich 0:d7bd7384a37c 225 if( f->flags & OPT_SILENT ) {
grzemich 0:d7bd7384a37c 226 f->state = LS_STOPPED;
grzemich 0:d7bd7384a37c 227 } else {
grzemich 0:d7bd7384a37c 228 /* Send an initial configure-request */
grzemich 0:d7bd7384a37c 229 fsm_sconfreq(f, 0);
grzemich 0:d7bd7384a37c 230 f->state = LS_REQSENT;
grzemich 0:d7bd7384a37c 231 }
grzemich 0:d7bd7384a37c 232 break;
grzemich 0:d7bd7384a37c 233
grzemich 0:d7bd7384a37c 234 case LS_CLOSING:
grzemich 0:d7bd7384a37c 235 f->state = LS_STOPPING;
grzemich 0:d7bd7384a37c 236 /* fall through */
grzemich 0:d7bd7384a37c 237 case LS_STOPPED:
grzemich 0:d7bd7384a37c 238 case LS_OPENED:
grzemich 0:d7bd7384a37c 239 if( f->flags & OPT_RESTART ) {
grzemich 0:d7bd7384a37c 240 fsm_lowerdown(f);
grzemich 0:d7bd7384a37c 241 fsm_lowerup(f);
grzemich 0:d7bd7384a37c 242 }
grzemich 0:d7bd7384a37c 243 break;
grzemich 0:d7bd7384a37c 244 }
grzemich 0:d7bd7384a37c 245
grzemich 0:d7bd7384a37c 246 FSMDEBUG(LOG_INFO, ("%s: open state %d (%s) -> %d (%s)\n",
grzemich 0:d7bd7384a37c 247 PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 248 }
grzemich 0:d7bd7384a37c 249
grzemich 0:d7bd7384a37c 250 #if 0 /* backport pppd 2.4.4b1; */
grzemich 0:d7bd7384a37c 251 /*
grzemich 0:d7bd7384a37c 252 * terminate_layer - Start process of shutting down the FSM
grzemich 0:d7bd7384a37c 253 *
grzemich 0:d7bd7384a37c 254 * Cancel any timeout running, notify upper layers we're done, and
grzemich 0:d7bd7384a37c 255 * send a terminate-request message as configured.
grzemich 0:d7bd7384a37c 256 */
grzemich 0:d7bd7384a37c 257 static void
grzemich 0:d7bd7384a37c 258 terminate_layer(fsm *f, int nextstate)
grzemich 0:d7bd7384a37c 259 {
grzemich 0:d7bd7384a37c 260 /* @todo */
grzemich 0:d7bd7384a37c 261 }
grzemich 0:d7bd7384a37c 262 #endif
grzemich 0:d7bd7384a37c 263
grzemich 0:d7bd7384a37c 264 /*
grzemich 0:d7bd7384a37c 265 * fsm_close - Start closing connection.
grzemich 0:d7bd7384a37c 266 *
grzemich 0:d7bd7384a37c 267 * Cancel timeouts and either initiate close or possibly go directly to
grzemich 0:d7bd7384a37c 268 * the LS_CLOSED state.
grzemich 0:d7bd7384a37c 269 */
grzemich 0:d7bd7384a37c 270 void
grzemich 0:d7bd7384a37c 271 fsm_close(fsm *f, char *reason)
grzemich 0:d7bd7384a37c 272 {
grzemich 0:d7bd7384a37c 273 int oldState = f->state;
grzemich 0:d7bd7384a37c 274
grzemich 0:d7bd7384a37c 275 LWIP_UNUSED_ARG(oldState);
grzemich 0:d7bd7384a37c 276
grzemich 0:d7bd7384a37c 277 f->term_reason = reason;
grzemich 0:d7bd7384a37c 278 f->term_reason_len = (reason == NULL ? 0 : (int)strlen(reason));
grzemich 0:d7bd7384a37c 279 switch( f->state ) {
grzemich 0:d7bd7384a37c 280 case LS_STARTING:
grzemich 0:d7bd7384a37c 281 f->state = LS_INITIAL;
grzemich 0:d7bd7384a37c 282 break;
grzemich 0:d7bd7384a37c 283 case LS_STOPPED:
grzemich 0:d7bd7384a37c 284 f->state = LS_CLOSED;
grzemich 0:d7bd7384a37c 285 break;
grzemich 0:d7bd7384a37c 286 case LS_STOPPING:
grzemich 0:d7bd7384a37c 287 f->state = LS_CLOSING;
grzemich 0:d7bd7384a37c 288 break;
grzemich 0:d7bd7384a37c 289
grzemich 0:d7bd7384a37c 290 case LS_REQSENT:
grzemich 0:d7bd7384a37c 291 case LS_ACKRCVD:
grzemich 0:d7bd7384a37c 292 case LS_ACKSENT:
grzemich 0:d7bd7384a37c 293 case LS_OPENED:
grzemich 0:d7bd7384a37c 294 if( f->state != LS_OPENED ) {
grzemich 0:d7bd7384a37c 295 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
grzemich 0:d7bd7384a37c 296 } else if( f->callbacks->down ) {
grzemich 0:d7bd7384a37c 297 (*f->callbacks->down)(f); /* Inform upper layers we're down */
grzemich 0:d7bd7384a37c 298 }
grzemich 0:d7bd7384a37c 299 /* Init restart counter, send Terminate-Request */
grzemich 0:d7bd7384a37c 300 f->retransmits = f->maxtermtransmits;
grzemich 0:d7bd7384a37c 301 fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
grzemich 0:d7bd7384a37c 302 (u_char *) f->term_reason, f->term_reason_len);
grzemich 0:d7bd7384a37c 303 TIMEOUT(fsm_timeout, f, f->timeouttime);
grzemich 0:d7bd7384a37c 304 --f->retransmits;
grzemich 0:d7bd7384a37c 305
grzemich 0:d7bd7384a37c 306 f->state = LS_CLOSING;
grzemich 0:d7bd7384a37c 307 break;
grzemich 0:d7bd7384a37c 308 }
grzemich 0:d7bd7384a37c 309
grzemich 0:d7bd7384a37c 310 FSMDEBUG(LOG_INFO, ("%s: close reason=%s state %d (%s) -> %d (%s)\n",
grzemich 0:d7bd7384a37c 311 PROTO_NAME(f), reason, oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 312 }
grzemich 0:d7bd7384a37c 313
grzemich 0:d7bd7384a37c 314
grzemich 0:d7bd7384a37c 315 /*
grzemich 0:d7bd7384a37c 316 * fsm_timeout - Timeout expired.
grzemich 0:d7bd7384a37c 317 */
grzemich 0:d7bd7384a37c 318 static void
grzemich 0:d7bd7384a37c 319 fsm_timeout(void *arg)
grzemich 0:d7bd7384a37c 320 {
grzemich 0:d7bd7384a37c 321 fsm *f = (fsm *) arg;
grzemich 0:d7bd7384a37c 322
grzemich 0:d7bd7384a37c 323 switch (f->state) {
grzemich 0:d7bd7384a37c 324 case LS_CLOSING:
grzemich 0:d7bd7384a37c 325 case LS_STOPPING:
grzemich 0:d7bd7384a37c 326 if( f->retransmits <= 0 ) {
grzemich 0:d7bd7384a37c 327 FSMDEBUG(LOG_WARNING, ("%s: timeout sending Terminate-Request state=%d (%s)\n",
grzemich 0:d7bd7384a37c 328 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 329 /*
grzemich 0:d7bd7384a37c 330 * We've waited for an ack long enough. Peer probably heard us.
grzemich 0:d7bd7384a37c 331 */
grzemich 0:d7bd7384a37c 332 f->state = (f->state == LS_CLOSING)? LS_CLOSED: LS_STOPPED;
grzemich 0:d7bd7384a37c 333 if( f->callbacks->finished ) {
grzemich 0:d7bd7384a37c 334 (*f->callbacks->finished)(f);
grzemich 0:d7bd7384a37c 335 }
grzemich 0:d7bd7384a37c 336 } else {
grzemich 0:d7bd7384a37c 337 FSMDEBUG(LOG_WARNING, ("%s: timeout resending Terminate-Requests state=%d (%s)\n",
grzemich 0:d7bd7384a37c 338 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 339 /* Send Terminate-Request */
grzemich 0:d7bd7384a37c 340 fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
grzemich 0:d7bd7384a37c 341 (u_char *) f->term_reason, f->term_reason_len);
grzemich 0:d7bd7384a37c 342 TIMEOUT(fsm_timeout, f, f->timeouttime);
grzemich 0:d7bd7384a37c 343 --f->retransmits;
grzemich 0:d7bd7384a37c 344 }
grzemich 0:d7bd7384a37c 345 break;
grzemich 0:d7bd7384a37c 346
grzemich 0:d7bd7384a37c 347 case LS_REQSENT:
grzemich 0:d7bd7384a37c 348 case LS_ACKRCVD:
grzemich 0:d7bd7384a37c 349 case LS_ACKSENT:
grzemich 0:d7bd7384a37c 350 if (f->retransmits <= 0) {
grzemich 0:d7bd7384a37c 351 FSMDEBUG(LOG_WARNING, ("%s: timeout sending Config-Requests state=%d (%s)\n",
grzemich 0:d7bd7384a37c 352 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 353 f->state = LS_STOPPED;
grzemich 0:d7bd7384a37c 354 if( (f->flags & OPT_PASSIVE) == 0 && f->callbacks->finished ) {
grzemich 0:d7bd7384a37c 355 (*f->callbacks->finished)(f);
grzemich 0:d7bd7384a37c 356 }
grzemich 0:d7bd7384a37c 357 } else {
grzemich 0:d7bd7384a37c 358 FSMDEBUG(LOG_WARNING, ("%s: timeout resending Config-Request state=%d (%s)\n",
grzemich 0:d7bd7384a37c 359 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 360 /* Retransmit the configure-request */
grzemich 0:d7bd7384a37c 361 if (f->callbacks->retransmit) {
grzemich 0:d7bd7384a37c 362 (*f->callbacks->retransmit)(f);
grzemich 0:d7bd7384a37c 363 }
grzemich 0:d7bd7384a37c 364 fsm_sconfreq(f, 1); /* Re-send Configure-Request */
grzemich 0:d7bd7384a37c 365 if( f->state == LS_ACKRCVD ) {
grzemich 0:d7bd7384a37c 366 f->state = LS_REQSENT;
grzemich 0:d7bd7384a37c 367 }
grzemich 0:d7bd7384a37c 368 }
grzemich 0:d7bd7384a37c 369 break;
grzemich 0:d7bd7384a37c 370
grzemich 0:d7bd7384a37c 371 default:
grzemich 0:d7bd7384a37c 372 FSMDEBUG(LOG_INFO, ("%s: UNHANDLED timeout event in state %d (%s)!\n",
grzemich 0:d7bd7384a37c 373 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 374 }
grzemich 0:d7bd7384a37c 375 }
grzemich 0:d7bd7384a37c 376
grzemich 0:d7bd7384a37c 377
grzemich 0:d7bd7384a37c 378 /*
grzemich 0:d7bd7384a37c 379 * fsm_input - Input packet.
grzemich 0:d7bd7384a37c 380 */
grzemich 0:d7bd7384a37c 381 void
grzemich 0:d7bd7384a37c 382 fsm_input(fsm *f, u_char *inpacket, int l)
grzemich 0:d7bd7384a37c 383 {
grzemich 0:d7bd7384a37c 384 u_char *inp = inpacket;
grzemich 0:d7bd7384a37c 385 u_char code, id;
grzemich 0:d7bd7384a37c 386 int len;
grzemich 0:d7bd7384a37c 387
grzemich 0:d7bd7384a37c 388 /*
grzemich 0:d7bd7384a37c 389 * Parse header (code, id and length).
grzemich 0:d7bd7384a37c 390 * If packet too short, drop it.
grzemich 0:d7bd7384a37c 391 */
grzemich 0:d7bd7384a37c 392 if (l < HEADERLEN) {
grzemich 0:d7bd7384a37c 393 FSMDEBUG(LOG_WARNING, ("fsm_input(%x): Rcvd short header.\n",
grzemich 0:d7bd7384a37c 394 f->protocol));
grzemich 0:d7bd7384a37c 395 return;
grzemich 0:d7bd7384a37c 396 }
grzemich 0:d7bd7384a37c 397 GETCHAR(code, inp);
grzemich 0:d7bd7384a37c 398 GETCHAR(id, inp);
grzemich 0:d7bd7384a37c 399 GETSHORT(len, inp);
grzemich 0:d7bd7384a37c 400 if (len < HEADERLEN) {
grzemich 0:d7bd7384a37c 401 FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd illegal length.\n",
grzemich 0:d7bd7384a37c 402 f->protocol));
grzemich 0:d7bd7384a37c 403 return;
grzemich 0:d7bd7384a37c 404 }
grzemich 0:d7bd7384a37c 405 if (len > l) {
grzemich 0:d7bd7384a37c 406 FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd short packet.\n",
grzemich 0:d7bd7384a37c 407 f->protocol));
grzemich 0:d7bd7384a37c 408 return;
grzemich 0:d7bd7384a37c 409 }
grzemich 0:d7bd7384a37c 410 len -= HEADERLEN; /* subtract header length */
grzemich 0:d7bd7384a37c 411
grzemich 0:d7bd7384a37c 412 if( f->state == LS_INITIAL || f->state == LS_STARTING ) {
grzemich 0:d7bd7384a37c 413 FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd packet in state %d (%s).\n",
grzemich 0:d7bd7384a37c 414 f->protocol, f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 415 return;
grzemich 0:d7bd7384a37c 416 }
grzemich 0:d7bd7384a37c 417 FSMDEBUG(LOG_INFO, ("fsm_input(%s):%d,%d,%d\n", PROTO_NAME(f), code, id, l));
grzemich 0:d7bd7384a37c 418 /*
grzemich 0:d7bd7384a37c 419 * Action depends on code.
grzemich 0:d7bd7384a37c 420 */
grzemich 0:d7bd7384a37c 421 switch (code) {
grzemich 0:d7bd7384a37c 422 case CONFREQ:
grzemich 0:d7bd7384a37c 423 fsm_rconfreq(f, id, inp, len);
grzemich 0:d7bd7384a37c 424 break;
grzemich 0:d7bd7384a37c 425
grzemich 0:d7bd7384a37c 426 case CONFACK:
grzemich 0:d7bd7384a37c 427 fsm_rconfack(f, id, inp, len);
grzemich 0:d7bd7384a37c 428 break;
grzemich 0:d7bd7384a37c 429
grzemich 0:d7bd7384a37c 430 case CONFNAK:
grzemich 0:d7bd7384a37c 431 case CONFREJ:
grzemich 0:d7bd7384a37c 432 fsm_rconfnakrej(f, code, id, inp, len);
grzemich 0:d7bd7384a37c 433 break;
grzemich 0:d7bd7384a37c 434
grzemich 0:d7bd7384a37c 435 case TERMREQ:
grzemich 0:d7bd7384a37c 436 fsm_rtermreq(f, id, inp, len);
grzemich 0:d7bd7384a37c 437 break;
grzemich 0:d7bd7384a37c 438
grzemich 0:d7bd7384a37c 439 case TERMACK:
grzemich 0:d7bd7384a37c 440 fsm_rtermack(f);
grzemich 0:d7bd7384a37c 441 break;
grzemich 0:d7bd7384a37c 442
grzemich 0:d7bd7384a37c 443 case CODEREJ:
grzemich 0:d7bd7384a37c 444 fsm_rcoderej(f, inp, len);
grzemich 0:d7bd7384a37c 445 break;
grzemich 0:d7bd7384a37c 446
grzemich 0:d7bd7384a37c 447 default:
grzemich 0:d7bd7384a37c 448 FSMDEBUG(LOG_INFO, ("fsm_input(%s): default: \n", PROTO_NAME(f)));
grzemich 0:d7bd7384a37c 449 if( !f->callbacks->extcode ||
grzemich 0:d7bd7384a37c 450 !(*f->callbacks->extcode)(f, code, id, inp, len) ) {
grzemich 0:d7bd7384a37c 451 fsm_sdata(f, CODEREJ, ++f->id, inpacket, len + HEADERLEN);
grzemich 0:d7bd7384a37c 452 }
grzemich 0:d7bd7384a37c 453 break;
grzemich 0:d7bd7384a37c 454 }
grzemich 0:d7bd7384a37c 455 }
grzemich 0:d7bd7384a37c 456
grzemich 0:d7bd7384a37c 457
grzemich 0:d7bd7384a37c 458 /*
grzemich 0:d7bd7384a37c 459 * fsm_rconfreq - Receive Configure-Request.
grzemich 0:d7bd7384a37c 460 */
grzemich 0:d7bd7384a37c 461 static void
grzemich 0:d7bd7384a37c 462 fsm_rconfreq(fsm *f, u_char id, u_char *inp, int len)
grzemich 0:d7bd7384a37c 463 {
grzemich 0:d7bd7384a37c 464 int code, reject_if_disagree;
grzemich 0:d7bd7384a37c 465
grzemich 0:d7bd7384a37c 466 FSMDEBUG(LOG_INFO, ("fsm_rconfreq(%s): Rcvd id %d state=%d (%s)\n",
grzemich 0:d7bd7384a37c 467 PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 468 switch( f->state ) {
grzemich 0:d7bd7384a37c 469 case LS_CLOSED:
grzemich 0:d7bd7384a37c 470 /* Go away, we're closed */
grzemich 0:d7bd7384a37c 471 fsm_sdata(f, TERMACK, id, NULL, 0);
grzemich 0:d7bd7384a37c 472 return;
grzemich 0:d7bd7384a37c 473 case LS_CLOSING:
grzemich 0:d7bd7384a37c 474 case LS_STOPPING:
grzemich 0:d7bd7384a37c 475 return;
grzemich 0:d7bd7384a37c 476
grzemich 0:d7bd7384a37c 477 case LS_OPENED:
grzemich 0:d7bd7384a37c 478 /* Go down and restart negotiation */
grzemich 0:d7bd7384a37c 479 if( f->callbacks->down ) {
grzemich 0:d7bd7384a37c 480 (*f->callbacks->down)(f); /* Inform upper layers */
grzemich 0:d7bd7384a37c 481 }
grzemich 0:d7bd7384a37c 482 fsm_sconfreq(f, 0); /* Send initial Configure-Request */
grzemich 0:d7bd7384a37c 483 break;
grzemich 0:d7bd7384a37c 484
grzemich 0:d7bd7384a37c 485 case LS_STOPPED:
grzemich 0:d7bd7384a37c 486 /* Negotiation started by our peer */
grzemich 0:d7bd7384a37c 487 fsm_sconfreq(f, 0); /* Send initial Configure-Request */
grzemich 0:d7bd7384a37c 488 f->state = LS_REQSENT;
grzemich 0:d7bd7384a37c 489 break;
grzemich 0:d7bd7384a37c 490 }
grzemich 0:d7bd7384a37c 491
grzemich 0:d7bd7384a37c 492 /*
grzemich 0:d7bd7384a37c 493 * Pass the requested configuration options
grzemich 0:d7bd7384a37c 494 * to protocol-specific code for checking.
grzemich 0:d7bd7384a37c 495 */
grzemich 0:d7bd7384a37c 496 if (f->callbacks->reqci) { /* Check CI */
grzemich 0:d7bd7384a37c 497 reject_if_disagree = (f->nakloops >= f->maxnakloops);
grzemich 0:d7bd7384a37c 498 code = (*f->callbacks->reqci)(f, inp, &len, reject_if_disagree);
grzemich 0:d7bd7384a37c 499 } else if (len) {
grzemich 0:d7bd7384a37c 500 code = CONFREJ; /* Reject all CI */
grzemich 0:d7bd7384a37c 501 } else {
grzemich 0:d7bd7384a37c 502 code = CONFACK;
grzemich 0:d7bd7384a37c 503 }
grzemich 0:d7bd7384a37c 504
grzemich 0:d7bd7384a37c 505 /* send the Ack, Nak or Rej to the peer */
grzemich 0:d7bd7384a37c 506 fsm_sdata(f, (u_char)code, id, inp, len);
grzemich 0:d7bd7384a37c 507
grzemich 0:d7bd7384a37c 508 if (code == CONFACK) {
grzemich 0:d7bd7384a37c 509 if (f->state == LS_ACKRCVD) {
grzemich 0:d7bd7384a37c 510 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
grzemich 0:d7bd7384a37c 511 f->state = LS_OPENED;
grzemich 0:d7bd7384a37c 512 if (f->callbacks->up) {
grzemich 0:d7bd7384a37c 513 (*f->callbacks->up)(f); /* Inform upper layers */
grzemich 0:d7bd7384a37c 514 }
grzemich 0:d7bd7384a37c 515 } else {
grzemich 0:d7bd7384a37c 516 f->state = LS_ACKSENT;
grzemich 0:d7bd7384a37c 517 }
grzemich 0:d7bd7384a37c 518 f->nakloops = 0;
grzemich 0:d7bd7384a37c 519 } else {
grzemich 0:d7bd7384a37c 520 /* we sent CONFACK or CONFREJ */
grzemich 0:d7bd7384a37c 521 if (f->state != LS_ACKRCVD) {
grzemich 0:d7bd7384a37c 522 f->state = LS_REQSENT;
grzemich 0:d7bd7384a37c 523 }
grzemich 0:d7bd7384a37c 524 if( code == CONFNAK ) {
grzemich 0:d7bd7384a37c 525 ++f->nakloops;
grzemich 0:d7bd7384a37c 526 }
grzemich 0:d7bd7384a37c 527 }
grzemich 0:d7bd7384a37c 528 }
grzemich 0:d7bd7384a37c 529
grzemich 0:d7bd7384a37c 530
grzemich 0:d7bd7384a37c 531 /*
grzemich 0:d7bd7384a37c 532 * fsm_rconfack - Receive Configure-Ack.
grzemich 0:d7bd7384a37c 533 */
grzemich 0:d7bd7384a37c 534 static void
grzemich 0:d7bd7384a37c 535 fsm_rconfack(fsm *f, int id, u_char *inp, int len)
grzemich 0:d7bd7384a37c 536 {
grzemich 0:d7bd7384a37c 537 FSMDEBUG(LOG_INFO, ("fsm_rconfack(%s): Rcvd id %d state=%d (%s)\n",
grzemich 0:d7bd7384a37c 538 PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 539
grzemich 0:d7bd7384a37c 540 if (id != f->reqid || f->seen_ack) { /* Expected id? */
grzemich 0:d7bd7384a37c 541 return; /* Nope, toss... */
grzemich 0:d7bd7384a37c 542 }
grzemich 0:d7bd7384a37c 543 if( !(f->callbacks->ackci? (*f->callbacks->ackci)(f, inp, len): (len == 0)) ) {
grzemich 0:d7bd7384a37c 544 /* Ack is bad - ignore it */
grzemich 0:d7bd7384a37c 545 FSMDEBUG(LOG_INFO, ("%s: received bad Ack (length %d)\n",
grzemich 0:d7bd7384a37c 546 PROTO_NAME(f), len));
grzemich 0:d7bd7384a37c 547 return;
grzemich 0:d7bd7384a37c 548 }
grzemich 0:d7bd7384a37c 549 f->seen_ack = 1;
grzemich 0:d7bd7384a37c 550
grzemich 0:d7bd7384a37c 551 switch (f->state) {
grzemich 0:d7bd7384a37c 552 case LS_CLOSED:
grzemich 0:d7bd7384a37c 553 case LS_STOPPED:
grzemich 0:d7bd7384a37c 554 fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
grzemich 0:d7bd7384a37c 555 break;
grzemich 0:d7bd7384a37c 556
grzemich 0:d7bd7384a37c 557 case LS_REQSENT:
grzemich 0:d7bd7384a37c 558 f->state = LS_ACKRCVD;
grzemich 0:d7bd7384a37c 559 f->retransmits = f->maxconfreqtransmits;
grzemich 0:d7bd7384a37c 560 break;
grzemich 0:d7bd7384a37c 561
grzemich 0:d7bd7384a37c 562 case LS_ACKRCVD:
grzemich 0:d7bd7384a37c 563 /* Huh? an extra valid Ack? oh well... */
grzemich 0:d7bd7384a37c 564 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
grzemich 0:d7bd7384a37c 565 fsm_sconfreq(f, 0);
grzemich 0:d7bd7384a37c 566 f->state = LS_REQSENT;
grzemich 0:d7bd7384a37c 567 break;
grzemich 0:d7bd7384a37c 568
grzemich 0:d7bd7384a37c 569 case LS_ACKSENT:
grzemich 0:d7bd7384a37c 570 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
grzemich 0:d7bd7384a37c 571 f->state = LS_OPENED;
grzemich 0:d7bd7384a37c 572 f->retransmits = f->maxconfreqtransmits;
grzemich 0:d7bd7384a37c 573 if (f->callbacks->up) {
grzemich 0:d7bd7384a37c 574 (*f->callbacks->up)(f); /* Inform upper layers */
grzemich 0:d7bd7384a37c 575 }
grzemich 0:d7bd7384a37c 576 break;
grzemich 0:d7bd7384a37c 577
grzemich 0:d7bd7384a37c 578 case LS_OPENED:
grzemich 0:d7bd7384a37c 579 /* Go down and restart negotiation */
grzemich 0:d7bd7384a37c 580 if (f->callbacks->down) {
grzemich 0:d7bd7384a37c 581 (*f->callbacks->down)(f); /* Inform upper layers */
grzemich 0:d7bd7384a37c 582 }
grzemich 0:d7bd7384a37c 583 fsm_sconfreq(f, 0); /* Send initial Configure-Request */
grzemich 0:d7bd7384a37c 584 f->state = LS_REQSENT;
grzemich 0:d7bd7384a37c 585 break;
grzemich 0:d7bd7384a37c 586 }
grzemich 0:d7bd7384a37c 587 }
grzemich 0:d7bd7384a37c 588
grzemich 0:d7bd7384a37c 589
grzemich 0:d7bd7384a37c 590 /*
grzemich 0:d7bd7384a37c 591 * fsm_rconfnakrej - Receive Configure-Nak or Configure-Reject.
grzemich 0:d7bd7384a37c 592 */
grzemich 0:d7bd7384a37c 593 static void
grzemich 0:d7bd7384a37c 594 fsm_rconfnakrej(fsm *f, int code, int id, u_char *inp, int len)
grzemich 0:d7bd7384a37c 595 {
grzemich 0:d7bd7384a37c 596 int (*proc) (fsm *, u_char *, int);
grzemich 0:d7bd7384a37c 597 int ret;
grzemich 0:d7bd7384a37c 598
grzemich 0:d7bd7384a37c 599 FSMDEBUG(LOG_INFO, ("fsm_rconfnakrej(%s): Rcvd id %d state=%d (%s)\n",
grzemich 0:d7bd7384a37c 600 PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 601
grzemich 0:d7bd7384a37c 602 if (id != f->reqid || f->seen_ack) { /* Expected id? */
grzemich 0:d7bd7384a37c 603 return; /* Nope, toss... */
grzemich 0:d7bd7384a37c 604 }
grzemich 0:d7bd7384a37c 605 proc = (code == CONFNAK)? f->callbacks->nakci: f->callbacks->rejci;
grzemich 0:d7bd7384a37c 606 if (!proc || !((ret = proc(f, inp, len)))) {
grzemich 0:d7bd7384a37c 607 /* Nak/reject is bad - ignore it */
grzemich 0:d7bd7384a37c 608 FSMDEBUG(LOG_INFO, ("%s: received bad %s (length %d)\n",
grzemich 0:d7bd7384a37c 609 PROTO_NAME(f), (code==CONFNAK? "Nak": "reject"), len));
grzemich 0:d7bd7384a37c 610 return;
grzemich 0:d7bd7384a37c 611 }
grzemich 0:d7bd7384a37c 612 f->seen_ack = 1;
grzemich 0:d7bd7384a37c 613
grzemich 0:d7bd7384a37c 614 switch (f->state) {
grzemich 0:d7bd7384a37c 615 case LS_CLOSED:
grzemich 0:d7bd7384a37c 616 case LS_STOPPED:
grzemich 0:d7bd7384a37c 617 fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
grzemich 0:d7bd7384a37c 618 break;
grzemich 0:d7bd7384a37c 619
grzemich 0:d7bd7384a37c 620 case LS_REQSENT:
grzemich 0:d7bd7384a37c 621 case LS_ACKSENT:
grzemich 0:d7bd7384a37c 622 /* They didn't agree to what we wanted - try another request */
grzemich 0:d7bd7384a37c 623 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
grzemich 0:d7bd7384a37c 624 if (ret < 0) {
grzemich 0:d7bd7384a37c 625 f->state = LS_STOPPED; /* kludge for stopping CCP */
grzemich 0:d7bd7384a37c 626 } else {
grzemich 0:d7bd7384a37c 627 fsm_sconfreq(f, 0); /* Send Configure-Request */
grzemich 0:d7bd7384a37c 628 }
grzemich 0:d7bd7384a37c 629 break;
grzemich 0:d7bd7384a37c 630
grzemich 0:d7bd7384a37c 631 case LS_ACKRCVD:
grzemich 0:d7bd7384a37c 632 /* Got a Nak/reject when we had already had an Ack?? oh well... */
grzemich 0:d7bd7384a37c 633 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
grzemich 0:d7bd7384a37c 634 fsm_sconfreq(f, 0);
grzemich 0:d7bd7384a37c 635 f->state = LS_REQSENT;
grzemich 0:d7bd7384a37c 636 break;
grzemich 0:d7bd7384a37c 637
grzemich 0:d7bd7384a37c 638 case LS_OPENED:
grzemich 0:d7bd7384a37c 639 /* Go down and restart negotiation */
grzemich 0:d7bd7384a37c 640 if (f->callbacks->down) {
grzemich 0:d7bd7384a37c 641 (*f->callbacks->down)(f); /* Inform upper layers */
grzemich 0:d7bd7384a37c 642 }
grzemich 0:d7bd7384a37c 643 fsm_sconfreq(f, 0); /* Send initial Configure-Request */
grzemich 0:d7bd7384a37c 644 f->state = LS_REQSENT;
grzemich 0:d7bd7384a37c 645 break;
grzemich 0:d7bd7384a37c 646 }
grzemich 0:d7bd7384a37c 647 }
grzemich 0:d7bd7384a37c 648
grzemich 0:d7bd7384a37c 649
grzemich 0:d7bd7384a37c 650 /*
grzemich 0:d7bd7384a37c 651 * fsm_rtermreq - Receive Terminate-Req.
grzemich 0:d7bd7384a37c 652 */
grzemich 0:d7bd7384a37c 653 static void
grzemich 0:d7bd7384a37c 654 fsm_rtermreq(fsm *f, int id, u_char *p, int len)
grzemich 0:d7bd7384a37c 655 {
grzemich 0:d7bd7384a37c 656 LWIP_UNUSED_ARG(p);
grzemich 0:d7bd7384a37c 657
grzemich 0:d7bd7384a37c 658 FSMDEBUG(LOG_INFO, ("fsm_rtermreq(%s): Rcvd id %d state=%d (%s)\n",
grzemich 0:d7bd7384a37c 659 PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 660
grzemich 0:d7bd7384a37c 661 switch (f->state) {
grzemich 0:d7bd7384a37c 662 case LS_ACKRCVD:
grzemich 0:d7bd7384a37c 663 case LS_ACKSENT:
grzemich 0:d7bd7384a37c 664 f->state = LS_REQSENT; /* Start over but keep trying */
grzemich 0:d7bd7384a37c 665 break;
grzemich 0:d7bd7384a37c 666
grzemich 0:d7bd7384a37c 667 case LS_OPENED:
grzemich 0:d7bd7384a37c 668 if (len > 0) {
grzemich 0:d7bd7384a37c 669 FSMDEBUG(LOG_INFO, ("%s terminated by peer (%p)\n", PROTO_NAME(f), p));
grzemich 0:d7bd7384a37c 670 } else {
grzemich 0:d7bd7384a37c 671 FSMDEBUG(LOG_INFO, ("%s terminated by peer\n", PROTO_NAME(f)));
grzemich 0:d7bd7384a37c 672 }
grzemich 0:d7bd7384a37c 673 if (f->callbacks->down) {
grzemich 0:d7bd7384a37c 674 (*f->callbacks->down)(f); /* Inform upper layers */
grzemich 0:d7bd7384a37c 675 }
grzemich 0:d7bd7384a37c 676 f->retransmits = 0;
grzemich 0:d7bd7384a37c 677 f->state = LS_STOPPING;
grzemich 0:d7bd7384a37c 678 TIMEOUT(fsm_timeout, f, f->timeouttime);
grzemich 0:d7bd7384a37c 679 break;
grzemich 0:d7bd7384a37c 680 }
grzemich 0:d7bd7384a37c 681
grzemich 0:d7bd7384a37c 682 fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
grzemich 0:d7bd7384a37c 683 }
grzemich 0:d7bd7384a37c 684
grzemich 0:d7bd7384a37c 685
grzemich 0:d7bd7384a37c 686 /*
grzemich 0:d7bd7384a37c 687 * fsm_rtermack - Receive Terminate-Ack.
grzemich 0:d7bd7384a37c 688 */
grzemich 0:d7bd7384a37c 689 static void
grzemich 0:d7bd7384a37c 690 fsm_rtermack(fsm *f)
grzemich 0:d7bd7384a37c 691 {
grzemich 0:d7bd7384a37c 692 FSMDEBUG(LOG_INFO, ("fsm_rtermack(%s): state=%d (%s)\n",
grzemich 0:d7bd7384a37c 693 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 694
grzemich 0:d7bd7384a37c 695 switch (f->state) {
grzemich 0:d7bd7384a37c 696 case LS_CLOSING:
grzemich 0:d7bd7384a37c 697 UNTIMEOUT(fsm_timeout, f);
grzemich 0:d7bd7384a37c 698 f->state = LS_CLOSED;
grzemich 0:d7bd7384a37c 699 if( f->callbacks->finished ) {
grzemich 0:d7bd7384a37c 700 (*f->callbacks->finished)(f);
grzemich 0:d7bd7384a37c 701 }
grzemich 0:d7bd7384a37c 702 break;
grzemich 0:d7bd7384a37c 703
grzemich 0:d7bd7384a37c 704 case LS_STOPPING:
grzemich 0:d7bd7384a37c 705 UNTIMEOUT(fsm_timeout, f);
grzemich 0:d7bd7384a37c 706 f->state = LS_STOPPED;
grzemich 0:d7bd7384a37c 707 if( f->callbacks->finished ) {
grzemich 0:d7bd7384a37c 708 (*f->callbacks->finished)(f);
grzemich 0:d7bd7384a37c 709 }
grzemich 0:d7bd7384a37c 710 break;
grzemich 0:d7bd7384a37c 711
grzemich 0:d7bd7384a37c 712 case LS_ACKRCVD:
grzemich 0:d7bd7384a37c 713 f->state = LS_REQSENT;
grzemich 0:d7bd7384a37c 714 break;
grzemich 0:d7bd7384a37c 715
grzemich 0:d7bd7384a37c 716 case LS_OPENED:
grzemich 0:d7bd7384a37c 717 if (f->callbacks->down) {
grzemich 0:d7bd7384a37c 718 (*f->callbacks->down)(f); /* Inform upper layers */
grzemich 0:d7bd7384a37c 719 }
grzemich 0:d7bd7384a37c 720 fsm_sconfreq(f, 0);
grzemich 0:d7bd7384a37c 721 break;
grzemich 0:d7bd7384a37c 722 default:
grzemich 0:d7bd7384a37c 723 FSMDEBUG(LOG_INFO, ("fsm_rtermack(%s): UNHANDLED state=%d (%s)!!!\n",
grzemich 0:d7bd7384a37c 724 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 725 }
grzemich 0:d7bd7384a37c 726 }
grzemich 0:d7bd7384a37c 727
grzemich 0:d7bd7384a37c 728
grzemich 0:d7bd7384a37c 729 /*
grzemich 0:d7bd7384a37c 730 * fsm_rcoderej - Receive an Code-Reject.
grzemich 0:d7bd7384a37c 731 */
grzemich 0:d7bd7384a37c 732 static void
grzemich 0:d7bd7384a37c 733 fsm_rcoderej(fsm *f, u_char *inp, int len)
grzemich 0:d7bd7384a37c 734 {
grzemich 0:d7bd7384a37c 735 u_char code, id;
grzemich 0:d7bd7384a37c 736
grzemich 0:d7bd7384a37c 737 FSMDEBUG(LOG_INFO, ("fsm_rcoderej(%s): state=%d (%s)\n",
grzemich 0:d7bd7384a37c 738 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 739
grzemich 0:d7bd7384a37c 740 if (len < HEADERLEN) {
grzemich 0:d7bd7384a37c 741 FSMDEBUG(LOG_INFO, ("fsm_rcoderej: Rcvd short Code-Reject packet!\n"));
grzemich 0:d7bd7384a37c 742 return;
grzemich 0:d7bd7384a37c 743 }
grzemich 0:d7bd7384a37c 744 GETCHAR(code, inp);
grzemich 0:d7bd7384a37c 745 GETCHAR(id, inp);
grzemich 0:d7bd7384a37c 746 FSMDEBUG(LOG_WARNING, ("%s: Rcvd Code-Reject for code %d, id %d\n",
grzemich 0:d7bd7384a37c 747 PROTO_NAME(f), code, id));
grzemich 0:d7bd7384a37c 748
grzemich 0:d7bd7384a37c 749 if( f->state == LS_ACKRCVD ) {
grzemich 0:d7bd7384a37c 750 f->state = LS_REQSENT;
grzemich 0:d7bd7384a37c 751 }
grzemich 0:d7bd7384a37c 752 }
grzemich 0:d7bd7384a37c 753
grzemich 0:d7bd7384a37c 754
grzemich 0:d7bd7384a37c 755 /*
grzemich 0:d7bd7384a37c 756 * fsm_protreject - Peer doesn't speak this protocol.
grzemich 0:d7bd7384a37c 757 *
grzemich 0:d7bd7384a37c 758 * Treat this as a catastrophic error (RXJ-).
grzemich 0:d7bd7384a37c 759 */
grzemich 0:d7bd7384a37c 760 void
grzemich 0:d7bd7384a37c 761 fsm_protreject(fsm *f)
grzemich 0:d7bd7384a37c 762 {
grzemich 0:d7bd7384a37c 763 switch( f->state ) {
grzemich 0:d7bd7384a37c 764 case LS_CLOSING:
grzemich 0:d7bd7384a37c 765 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
grzemich 0:d7bd7384a37c 766 /* fall through */
grzemich 0:d7bd7384a37c 767 case LS_CLOSED:
grzemich 0:d7bd7384a37c 768 f->state = LS_CLOSED;
grzemich 0:d7bd7384a37c 769 if( f->callbacks->finished ) {
grzemich 0:d7bd7384a37c 770 (*f->callbacks->finished)(f);
grzemich 0:d7bd7384a37c 771 }
grzemich 0:d7bd7384a37c 772 break;
grzemich 0:d7bd7384a37c 773
grzemich 0:d7bd7384a37c 774 case LS_STOPPING:
grzemich 0:d7bd7384a37c 775 case LS_REQSENT:
grzemich 0:d7bd7384a37c 776 case LS_ACKRCVD:
grzemich 0:d7bd7384a37c 777 case LS_ACKSENT:
grzemich 0:d7bd7384a37c 778 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
grzemich 0:d7bd7384a37c 779 /* fall through */
grzemich 0:d7bd7384a37c 780 case LS_STOPPED:
grzemich 0:d7bd7384a37c 781 f->state = LS_STOPPED;
grzemich 0:d7bd7384a37c 782 if( f->callbacks->finished ) {
grzemich 0:d7bd7384a37c 783 (*f->callbacks->finished)(f);
grzemich 0:d7bd7384a37c 784 }
grzemich 0:d7bd7384a37c 785 break;
grzemich 0:d7bd7384a37c 786
grzemich 0:d7bd7384a37c 787 case LS_OPENED:
grzemich 0:d7bd7384a37c 788 if( f->callbacks->down ) {
grzemich 0:d7bd7384a37c 789 (*f->callbacks->down)(f);
grzemich 0:d7bd7384a37c 790 }
grzemich 0:d7bd7384a37c 791 /* Init restart counter, send Terminate-Request */
grzemich 0:d7bd7384a37c 792 f->retransmits = f->maxtermtransmits;
grzemich 0:d7bd7384a37c 793 fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
grzemich 0:d7bd7384a37c 794 (u_char *) f->term_reason, f->term_reason_len);
grzemich 0:d7bd7384a37c 795 TIMEOUT(fsm_timeout, f, f->timeouttime);
grzemich 0:d7bd7384a37c 796 --f->retransmits;
grzemich 0:d7bd7384a37c 797
grzemich 0:d7bd7384a37c 798 f->state = LS_STOPPING;
grzemich 0:d7bd7384a37c 799 break;
grzemich 0:d7bd7384a37c 800
grzemich 0:d7bd7384a37c 801 default:
grzemich 0:d7bd7384a37c 802 FSMDEBUG(LOG_INFO, ("%s: Protocol-reject event in state %d (%s)!\n",
grzemich 0:d7bd7384a37c 803 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
grzemich 0:d7bd7384a37c 804 }
grzemich 0:d7bd7384a37c 805 }
grzemich 0:d7bd7384a37c 806
grzemich 0:d7bd7384a37c 807
grzemich 0:d7bd7384a37c 808 /*
grzemich 0:d7bd7384a37c 809 * fsm_sconfreq - Send a Configure-Request.
grzemich 0:d7bd7384a37c 810 */
grzemich 0:d7bd7384a37c 811 static void
grzemich 0:d7bd7384a37c 812 fsm_sconfreq(fsm *f, int retransmit)
grzemich 0:d7bd7384a37c 813 {
grzemich 0:d7bd7384a37c 814 u_char *outp;
grzemich 0:d7bd7384a37c 815 int cilen;
grzemich 0:d7bd7384a37c 816
grzemich 0:d7bd7384a37c 817 if( f->state != LS_REQSENT && f->state != LS_ACKRCVD && f->state != LS_ACKSENT ) {
grzemich 0:d7bd7384a37c 818 /* Not currently negotiating - reset options */
grzemich 0:d7bd7384a37c 819 if( f->callbacks->resetci ) {
grzemich 0:d7bd7384a37c 820 (*f->callbacks->resetci)(f);
grzemich 0:d7bd7384a37c 821 }
grzemich 0:d7bd7384a37c 822 f->nakloops = 0;
grzemich 0:d7bd7384a37c 823 }
grzemich 0:d7bd7384a37c 824
grzemich 0:d7bd7384a37c 825 if( !retransmit ) {
grzemich 0:d7bd7384a37c 826 /* New request - reset retransmission counter, use new ID */
grzemich 0:d7bd7384a37c 827 f->retransmits = f->maxconfreqtransmits;
grzemich 0:d7bd7384a37c 828 f->reqid = ++f->id;
grzemich 0:d7bd7384a37c 829 }
grzemich 0:d7bd7384a37c 830
grzemich 0:d7bd7384a37c 831 f->seen_ack = 0;
grzemich 0:d7bd7384a37c 832
grzemich 0:d7bd7384a37c 833 /*
grzemich 0:d7bd7384a37c 834 * Make up the request packet
grzemich 0:d7bd7384a37c 835 */
grzemich 0:d7bd7384a37c 836 outp = outpacket_buf[f->unit] + PPP_HDRLEN + HEADERLEN;
grzemich 0:d7bd7384a37c 837 if( f->callbacks->cilen && f->callbacks->addci ) {
grzemich 0:d7bd7384a37c 838 cilen = (*f->callbacks->cilen)(f);
grzemich 0:d7bd7384a37c 839 if( cilen > peer_mru[f->unit] - (int)HEADERLEN ) {
grzemich 0:d7bd7384a37c 840 cilen = peer_mru[f->unit] - HEADERLEN;
grzemich 0:d7bd7384a37c 841 }
grzemich 0:d7bd7384a37c 842 if (f->callbacks->addci) {
grzemich 0:d7bd7384a37c 843 (*f->callbacks->addci)(f, outp, &cilen);
grzemich 0:d7bd7384a37c 844 }
grzemich 0:d7bd7384a37c 845 } else {
grzemich 0:d7bd7384a37c 846 cilen = 0;
grzemich 0:d7bd7384a37c 847 }
grzemich 0:d7bd7384a37c 848
grzemich 0:d7bd7384a37c 849 /* send the request to our peer */
grzemich 0:d7bd7384a37c 850 fsm_sdata(f, CONFREQ, f->reqid, outp, cilen);
grzemich 0:d7bd7384a37c 851
grzemich 0:d7bd7384a37c 852 /* start the retransmit timer */
grzemich 0:d7bd7384a37c 853 --f->retransmits;
grzemich 0:d7bd7384a37c 854 TIMEOUT(fsm_timeout, f, f->timeouttime);
grzemich 0:d7bd7384a37c 855
grzemich 0:d7bd7384a37c 856 FSMDEBUG(LOG_INFO, ("%s: sending Configure-Request, id %d\n",
grzemich 0:d7bd7384a37c 857 PROTO_NAME(f), f->reqid));
grzemich 0:d7bd7384a37c 858 }
grzemich 0:d7bd7384a37c 859
grzemich 0:d7bd7384a37c 860
grzemich 0:d7bd7384a37c 861 /*
grzemich 0:d7bd7384a37c 862 * fsm_sdata - Send some data.
grzemich 0:d7bd7384a37c 863 *
grzemich 0:d7bd7384a37c 864 * Used for all packets sent to our peer by this module.
grzemich 0:d7bd7384a37c 865 */
grzemich 0:d7bd7384a37c 866 void
grzemich 0:d7bd7384a37c 867 fsm_sdata( fsm *f, u_char code, u_char id, u_char *data, int datalen)
grzemich 0:d7bd7384a37c 868 {
grzemich 0:d7bd7384a37c 869 u_char *outp;
grzemich 0:d7bd7384a37c 870 int outlen;
grzemich 0:d7bd7384a37c 871
grzemich 0:d7bd7384a37c 872 /* Adjust length to be smaller than MTU */
grzemich 0:d7bd7384a37c 873 outp = outpacket_buf[f->unit];
grzemich 0:d7bd7384a37c 874 if (datalen > peer_mru[f->unit] - (int)HEADERLEN) {
grzemich 0:d7bd7384a37c 875 datalen = peer_mru[f->unit] - HEADERLEN;
grzemich 0:d7bd7384a37c 876 }
grzemich 0:d7bd7384a37c 877 if (datalen && data != outp + PPP_HDRLEN + HEADERLEN) {
grzemich 0:d7bd7384a37c 878 BCOPY(data, outp + PPP_HDRLEN + HEADERLEN, datalen);
grzemich 0:d7bd7384a37c 879 }
grzemich 0:d7bd7384a37c 880 outlen = datalen + HEADERLEN;
grzemich 0:d7bd7384a37c 881 MAKEHEADER(outp, f->protocol);
grzemich 0:d7bd7384a37c 882 PUTCHAR(code, outp);
grzemich 0:d7bd7384a37c 883 PUTCHAR(id, outp);
grzemich 0:d7bd7384a37c 884 PUTSHORT(outlen, outp);
grzemich 0:d7bd7384a37c 885 pppWrite(f->unit, outpacket_buf[f->unit], outlen + PPP_HDRLEN);
grzemich 0:d7bd7384a37c 886 FSMDEBUG(LOG_INFO, ("fsm_sdata(%s): Sent code %d,%d,%d.\n",
grzemich 0:d7bd7384a37c 887 PROTO_NAME(f), code, id, outlen));
grzemich 0:d7bd7384a37c 888 }
grzemich 0:d7bd7384a37c 889
grzemich 0:d7bd7384a37c 890 #endif /* PPP_SUPPORT */