ZG2100 Network interface source

Committer:
donatien
Date:
Fri Jul 09 15:37:23 2010 +0000
Revision:
0:b802fc31f1db
Child:
1:3a7c15057192

        

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:b802fc31f1db 1 /*****************************************************************************
donatien 0:b802fc31f1db 2 * fsm.c - Network Control Protocol Finite State Machine program file.
donatien 0:b802fc31f1db 3 *
donatien 0:b802fc31f1db 4 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
donatien 0:b802fc31f1db 5 * portions Copyright (c) 1997 by Global Election Systems Inc.
donatien 0:b802fc31f1db 6 *
donatien 0:b802fc31f1db 7 * The authors hereby grant permission to use, copy, modify, distribute,
donatien 0:b802fc31f1db 8 * and license this software and its documentation for any purpose, provided
donatien 0:b802fc31f1db 9 * that existing copyright notices are retained in all copies and that this
donatien 0:b802fc31f1db 10 * notice and the following disclaimer are included verbatim in any
donatien 0:b802fc31f1db 11 * distributions. No written agreement, license, or royalty fee is required
donatien 0:b802fc31f1db 12 * for any of the authorized uses.
donatien 0:b802fc31f1db 13 *
donatien 0:b802fc31f1db 14 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
donatien 0:b802fc31f1db 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
donatien 0:b802fc31f1db 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
donatien 0:b802fc31f1db 17 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
donatien 0:b802fc31f1db 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
donatien 0:b802fc31f1db 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
donatien 0:b802fc31f1db 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
donatien 0:b802fc31f1db 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
donatien 0:b802fc31f1db 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
donatien 0:b802fc31f1db 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
donatien 0:b802fc31f1db 24 *
donatien 0:b802fc31f1db 25 ******************************************************************************
donatien 0:b802fc31f1db 26 * REVISION HISTORY
donatien 0:b802fc31f1db 27 *
donatien 0:b802fc31f1db 28 * 03-01-01 Marc Boucher <marc@mbsi.ca>
donatien 0:b802fc31f1db 29 * Ported to lwIP.
donatien 0:b802fc31f1db 30 * 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
donatien 0:b802fc31f1db 31 * Original based on BSD fsm.c.
donatien 0:b802fc31f1db 32 *****************************************************************************/
donatien 0:b802fc31f1db 33 /*
donatien 0:b802fc31f1db 34 * fsm.c - {Link, IP} Control Protocol Finite State Machine.
donatien 0:b802fc31f1db 35 *
donatien 0:b802fc31f1db 36 * Copyright (c) 1989 Carnegie Mellon University.
donatien 0:b802fc31f1db 37 * All rights reserved.
donatien 0:b802fc31f1db 38 *
donatien 0:b802fc31f1db 39 * Redistribution and use in source and binary forms are permitted
donatien 0:b802fc31f1db 40 * provided that the above copyright notice and this paragraph are
donatien 0:b802fc31f1db 41 * duplicated in all such forms and that any documentation,
donatien 0:b802fc31f1db 42 * advertising materials, and other materials related to such
donatien 0:b802fc31f1db 43 * distribution and use acknowledge that the software was developed
donatien 0:b802fc31f1db 44 * by Carnegie Mellon University. The name of the
donatien 0:b802fc31f1db 45 * University may not be used to endorse or promote products derived
donatien 0:b802fc31f1db 46 * from this software without specific prior written permission.
donatien 0:b802fc31f1db 47 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
donatien 0:b802fc31f1db 48 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
donatien 0:b802fc31f1db 49 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
donatien 0:b802fc31f1db 50 */
donatien 0:b802fc31f1db 51
donatien 0:b802fc31f1db 52 /*
donatien 0:b802fc31f1db 53 * TODO:
donatien 0:b802fc31f1db 54 * Randomize fsm id on link/init.
donatien 0:b802fc31f1db 55 * Deal with variable outgoing MTU.
donatien 0:b802fc31f1db 56 */
donatien 0:b802fc31f1db 57
donatien 0:b802fc31f1db 58 #include "lwip/opt.h"
donatien 0:b802fc31f1db 59
donatien 0:b802fc31f1db 60 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
donatien 0:b802fc31f1db 61
donatien 0:b802fc31f1db 62 #include "ppp.h"
donatien 0:b802fc31f1db 63 #include "pppdebug.h"
donatien 0:b802fc31f1db 64
donatien 0:b802fc31f1db 65 #include "fsm.h"
donatien 0:b802fc31f1db 66
donatien 0:b802fc31f1db 67 #include <string.h>
donatien 0:b802fc31f1db 68
donatien 0:b802fc31f1db 69 #if PPP_DEBUG
donatien 0:b802fc31f1db 70 static const char *ppperr_strerr[] = {
donatien 0:b802fc31f1db 71 "LS_INITIAL", /* LS_INITIAL 0 */
donatien 0:b802fc31f1db 72 "LS_STARTING", /* LS_STARTING 1 */
donatien 0:b802fc31f1db 73 "LS_CLOSED", /* LS_CLOSED 2 */
donatien 0:b802fc31f1db 74 "LS_STOPPED", /* LS_STOPPED 3 */
donatien 0:b802fc31f1db 75 "LS_CLOSING", /* LS_CLOSING 4 */
donatien 0:b802fc31f1db 76 "LS_STOPPING", /* LS_STOPPING 5 */
donatien 0:b802fc31f1db 77 "LS_REQSENT", /* LS_REQSENT 6 */
donatien 0:b802fc31f1db 78 "LS_ACKRCVD", /* LS_ACKRCVD 7 */
donatien 0:b802fc31f1db 79 "LS_ACKSENT", /* LS_ACKSENT 8 */
donatien 0:b802fc31f1db 80 "LS_OPENED" /* LS_OPENED 9 */
donatien 0:b802fc31f1db 81 };
donatien 0:b802fc31f1db 82 #endif /* PPP_DEBUG */
donatien 0:b802fc31f1db 83
donatien 0:b802fc31f1db 84 static void fsm_timeout (void *);
donatien 0:b802fc31f1db 85 static void fsm_rconfreq (fsm *, u_char, u_char *, int);
donatien 0:b802fc31f1db 86 static void fsm_rconfack (fsm *, int, u_char *, int);
donatien 0:b802fc31f1db 87 static void fsm_rconfnakrej (fsm *, int, int, u_char *, int);
donatien 0:b802fc31f1db 88 static void fsm_rtermreq (fsm *, int, u_char *, int);
donatien 0:b802fc31f1db 89 static void fsm_rtermack (fsm *);
donatien 0:b802fc31f1db 90 static void fsm_rcoderej (fsm *, u_char *, int);
donatien 0:b802fc31f1db 91 static void fsm_sconfreq (fsm *, int);
donatien 0:b802fc31f1db 92
donatien 0:b802fc31f1db 93 #define PROTO_NAME(f) ((f)->callbacks->proto_name)
donatien 0:b802fc31f1db 94
donatien 0:b802fc31f1db 95 int peer_mru[NUM_PPP];
donatien 0:b802fc31f1db 96
donatien 0:b802fc31f1db 97
donatien 0:b802fc31f1db 98 /*
donatien 0:b802fc31f1db 99 * fsm_init - Initialize fsm.
donatien 0:b802fc31f1db 100 *
donatien 0:b802fc31f1db 101 * Initialize fsm state.
donatien 0:b802fc31f1db 102 */
donatien 0:b802fc31f1db 103 void
donatien 0:b802fc31f1db 104 fsm_init(fsm *f)
donatien 0:b802fc31f1db 105 {
donatien 0:b802fc31f1db 106 f->state = LS_INITIAL;
donatien 0:b802fc31f1db 107 f->flags = 0;
donatien 0:b802fc31f1db 108 f->id = 0; /* XXX Start with random id? */
donatien 0:b802fc31f1db 109 f->timeouttime = FSM_DEFTIMEOUT;
donatien 0:b802fc31f1db 110 f->maxconfreqtransmits = FSM_DEFMAXCONFREQS;
donatien 0:b802fc31f1db 111 f->maxtermtransmits = FSM_DEFMAXTERMREQS;
donatien 0:b802fc31f1db 112 f->maxnakloops = FSM_DEFMAXNAKLOOPS;
donatien 0:b802fc31f1db 113 f->term_reason_len = 0;
donatien 0:b802fc31f1db 114 }
donatien 0:b802fc31f1db 115
donatien 0:b802fc31f1db 116
donatien 0:b802fc31f1db 117 /*
donatien 0:b802fc31f1db 118 * fsm_lowerup - The lower layer is up.
donatien 0:b802fc31f1db 119 */
donatien 0:b802fc31f1db 120 void
donatien 0:b802fc31f1db 121 fsm_lowerup(fsm *f)
donatien 0:b802fc31f1db 122 {
donatien 0:b802fc31f1db 123 #if PPP_DEBUG
donatien 0:b802fc31f1db 124 int oldState = f->state;
donatien 0:b802fc31f1db 125
donatien 0:b802fc31f1db 126 LWIP_UNUSED_ARG(oldState);
donatien 0:b802fc31f1db 127 #endif
donatien 0:b802fc31f1db 128
donatien 0:b802fc31f1db 129 switch( f->state ) {
donatien 0:b802fc31f1db 130 case LS_INITIAL:
donatien 0:b802fc31f1db 131 f->state = LS_CLOSED;
donatien 0:b802fc31f1db 132 break;
donatien 0:b802fc31f1db 133
donatien 0:b802fc31f1db 134 case LS_STARTING:
donatien 0:b802fc31f1db 135 if( f->flags & OPT_SILENT ) {
donatien 0:b802fc31f1db 136 f->state = LS_STOPPED;
donatien 0:b802fc31f1db 137 } else {
donatien 0:b802fc31f1db 138 /* Send an initial configure-request */
donatien 0:b802fc31f1db 139 fsm_sconfreq(f, 0);
donatien 0:b802fc31f1db 140 f->state = LS_REQSENT;
donatien 0:b802fc31f1db 141 }
donatien 0:b802fc31f1db 142 break;
donatien 0:b802fc31f1db 143
donatien 0:b802fc31f1db 144 default:
donatien 0:b802fc31f1db 145 FSMDEBUG(LOG_INFO, ("%s: Up event in state %d (%s)!\n",
donatien 0:b802fc31f1db 146 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 147 }
donatien 0:b802fc31f1db 148
donatien 0:b802fc31f1db 149 FSMDEBUG(LOG_INFO, ("%s: lowerup state %d (%s) -> %d (%s)\n",
donatien 0:b802fc31f1db 150 PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 151 }
donatien 0:b802fc31f1db 152
donatien 0:b802fc31f1db 153
donatien 0:b802fc31f1db 154 /*
donatien 0:b802fc31f1db 155 * fsm_lowerdown - The lower layer is down.
donatien 0:b802fc31f1db 156 *
donatien 0:b802fc31f1db 157 * Cancel all timeouts and inform upper layers.
donatien 0:b802fc31f1db 158 */
donatien 0:b802fc31f1db 159 void
donatien 0:b802fc31f1db 160 fsm_lowerdown(fsm *f)
donatien 0:b802fc31f1db 161 {
donatien 0:b802fc31f1db 162 #if PPP_DEBUG
donatien 0:b802fc31f1db 163 int oldState = f->state;
donatien 0:b802fc31f1db 164
donatien 0:b802fc31f1db 165 LWIP_UNUSED_ARG(oldState);
donatien 0:b802fc31f1db 166 #endif
donatien 0:b802fc31f1db 167
donatien 0:b802fc31f1db 168 switch( f->state ) {
donatien 0:b802fc31f1db 169 case LS_CLOSED:
donatien 0:b802fc31f1db 170 f->state = LS_INITIAL;
donatien 0:b802fc31f1db 171 break;
donatien 0:b802fc31f1db 172
donatien 0:b802fc31f1db 173 case LS_STOPPED:
donatien 0:b802fc31f1db 174 f->state = LS_STARTING;
donatien 0:b802fc31f1db 175 if( f->callbacks->starting ) {
donatien 0:b802fc31f1db 176 (*f->callbacks->starting)(f);
donatien 0:b802fc31f1db 177 }
donatien 0:b802fc31f1db 178 break;
donatien 0:b802fc31f1db 179
donatien 0:b802fc31f1db 180 case LS_CLOSING:
donatien 0:b802fc31f1db 181 f->state = LS_INITIAL;
donatien 0:b802fc31f1db 182 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien 0:b802fc31f1db 183 break;
donatien 0:b802fc31f1db 184
donatien 0:b802fc31f1db 185 case LS_STOPPING:
donatien 0:b802fc31f1db 186 case LS_REQSENT:
donatien 0:b802fc31f1db 187 case LS_ACKRCVD:
donatien 0:b802fc31f1db 188 case LS_ACKSENT:
donatien 0:b802fc31f1db 189 f->state = LS_STARTING;
donatien 0:b802fc31f1db 190 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien 0:b802fc31f1db 191 break;
donatien 0:b802fc31f1db 192
donatien 0:b802fc31f1db 193 case LS_OPENED:
donatien 0:b802fc31f1db 194 if( f->callbacks->down ) {
donatien 0:b802fc31f1db 195 (*f->callbacks->down)(f);
donatien 0:b802fc31f1db 196 }
donatien 0:b802fc31f1db 197 f->state = LS_STARTING;
donatien 0:b802fc31f1db 198 break;
donatien 0:b802fc31f1db 199
donatien 0:b802fc31f1db 200 default:
donatien 0:b802fc31f1db 201 FSMDEBUG(LOG_INFO, ("%s: Down event in state %d (%s)!\n",
donatien 0:b802fc31f1db 202 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 203 }
donatien 0:b802fc31f1db 204
donatien 0:b802fc31f1db 205 FSMDEBUG(LOG_INFO, ("%s: lowerdown state %d (%s) -> %d (%s)\n",
donatien 0:b802fc31f1db 206 PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 207 }
donatien 0:b802fc31f1db 208
donatien 0:b802fc31f1db 209
donatien 0:b802fc31f1db 210 /*
donatien 0:b802fc31f1db 211 * fsm_open - Link is allowed to come up.
donatien 0:b802fc31f1db 212 */
donatien 0:b802fc31f1db 213 void
donatien 0:b802fc31f1db 214 fsm_open(fsm *f)
donatien 0:b802fc31f1db 215 {
donatien 0:b802fc31f1db 216 #if PPP_DEBUG
donatien 0:b802fc31f1db 217 int oldState = f->state;
donatien 0:b802fc31f1db 218
donatien 0:b802fc31f1db 219 LWIP_UNUSED_ARG(oldState);
donatien 0:b802fc31f1db 220 #endif
donatien 0:b802fc31f1db 221
donatien 0:b802fc31f1db 222 switch( f->state ) {
donatien 0:b802fc31f1db 223 case LS_INITIAL:
donatien 0:b802fc31f1db 224 f->state = LS_STARTING;
donatien 0:b802fc31f1db 225 if( f->callbacks->starting ) {
donatien 0:b802fc31f1db 226 (*f->callbacks->starting)(f);
donatien 0:b802fc31f1db 227 }
donatien 0:b802fc31f1db 228 break;
donatien 0:b802fc31f1db 229
donatien 0:b802fc31f1db 230 case LS_CLOSED:
donatien 0:b802fc31f1db 231 if( f->flags & OPT_SILENT ) {
donatien 0:b802fc31f1db 232 f->state = LS_STOPPED;
donatien 0:b802fc31f1db 233 } else {
donatien 0:b802fc31f1db 234 /* Send an initial configure-request */
donatien 0:b802fc31f1db 235 fsm_sconfreq(f, 0);
donatien 0:b802fc31f1db 236 f->state = LS_REQSENT;
donatien 0:b802fc31f1db 237 }
donatien 0:b802fc31f1db 238 break;
donatien 0:b802fc31f1db 239
donatien 0:b802fc31f1db 240 case LS_CLOSING:
donatien 0:b802fc31f1db 241 f->state = LS_STOPPING;
donatien 0:b802fc31f1db 242 /* fall through */
donatien 0:b802fc31f1db 243 case LS_STOPPED:
donatien 0:b802fc31f1db 244 case LS_OPENED:
donatien 0:b802fc31f1db 245 if( f->flags & OPT_RESTART ) {
donatien 0:b802fc31f1db 246 fsm_lowerdown(f);
donatien 0:b802fc31f1db 247 fsm_lowerup(f);
donatien 0:b802fc31f1db 248 }
donatien 0:b802fc31f1db 249 break;
donatien 0:b802fc31f1db 250 }
donatien 0:b802fc31f1db 251
donatien 0:b802fc31f1db 252 FSMDEBUG(LOG_INFO, ("%s: open state %d (%s) -> %d (%s)\n",
donatien 0:b802fc31f1db 253 PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 254 }
donatien 0:b802fc31f1db 255
donatien 0:b802fc31f1db 256 #if 0 /* backport pppd 2.4.4b1; */
donatien 0:b802fc31f1db 257 /*
donatien 0:b802fc31f1db 258 * terminate_layer - Start process of shutting down the FSM
donatien 0:b802fc31f1db 259 *
donatien 0:b802fc31f1db 260 * Cancel any timeout running, notify upper layers we're done, and
donatien 0:b802fc31f1db 261 * send a terminate-request message as configured.
donatien 0:b802fc31f1db 262 */
donatien 0:b802fc31f1db 263 static void
donatien 0:b802fc31f1db 264 terminate_layer(fsm *f, int nextstate)
donatien 0:b802fc31f1db 265 {
donatien 0:b802fc31f1db 266 /* @todo */
donatien 0:b802fc31f1db 267 }
donatien 0:b802fc31f1db 268 #endif
donatien 0:b802fc31f1db 269
donatien 0:b802fc31f1db 270 /*
donatien 0:b802fc31f1db 271 * fsm_close - Start closing connection.
donatien 0:b802fc31f1db 272 *
donatien 0:b802fc31f1db 273 * Cancel timeouts and either initiate close or possibly go directly to
donatien 0:b802fc31f1db 274 * the LS_CLOSED state.
donatien 0:b802fc31f1db 275 */
donatien 0:b802fc31f1db 276 void
donatien 0:b802fc31f1db 277 fsm_close(fsm *f, char *reason)
donatien 0:b802fc31f1db 278 {
donatien 0:b802fc31f1db 279 #if PPP_DEBUG
donatien 0:b802fc31f1db 280 int oldState = f->state;
donatien 0:b802fc31f1db 281
donatien 0:b802fc31f1db 282 LWIP_UNUSED_ARG(oldState);
donatien 0:b802fc31f1db 283 #endif
donatien 0:b802fc31f1db 284
donatien 0:b802fc31f1db 285 f->term_reason = reason;
donatien 0:b802fc31f1db 286 f->term_reason_len = (reason == NULL ? 0 : (int)strlen(reason));
donatien 0:b802fc31f1db 287 switch( f->state ) {
donatien 0:b802fc31f1db 288 case LS_STARTING:
donatien 0:b802fc31f1db 289 f->state = LS_INITIAL;
donatien 0:b802fc31f1db 290 break;
donatien 0:b802fc31f1db 291 case LS_STOPPED:
donatien 0:b802fc31f1db 292 f->state = LS_CLOSED;
donatien 0:b802fc31f1db 293 break;
donatien 0:b802fc31f1db 294 case LS_STOPPING:
donatien 0:b802fc31f1db 295 f->state = LS_CLOSING;
donatien 0:b802fc31f1db 296 break;
donatien 0:b802fc31f1db 297
donatien 0:b802fc31f1db 298 case LS_REQSENT:
donatien 0:b802fc31f1db 299 case LS_ACKRCVD:
donatien 0:b802fc31f1db 300 case LS_ACKSENT:
donatien 0:b802fc31f1db 301 case LS_OPENED:
donatien 0:b802fc31f1db 302 if( f->state != LS_OPENED ) {
donatien 0:b802fc31f1db 303 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien 0:b802fc31f1db 304 } else if( f->callbacks->down ) {
donatien 0:b802fc31f1db 305 (*f->callbacks->down)(f); /* Inform upper layers we're down */
donatien 0:b802fc31f1db 306 }
donatien 0:b802fc31f1db 307 /* Init restart counter, send Terminate-Request */
donatien 0:b802fc31f1db 308 f->retransmits = f->maxtermtransmits;
donatien 0:b802fc31f1db 309 fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
donatien 0:b802fc31f1db 310 (u_char *) f->term_reason, f->term_reason_len);
donatien 0:b802fc31f1db 311 TIMEOUT(fsm_timeout, f, f->timeouttime);
donatien 0:b802fc31f1db 312 --f->retransmits;
donatien 0:b802fc31f1db 313
donatien 0:b802fc31f1db 314 f->state = LS_CLOSING;
donatien 0:b802fc31f1db 315 break;
donatien 0:b802fc31f1db 316 }
donatien 0:b802fc31f1db 317
donatien 0:b802fc31f1db 318 FSMDEBUG(LOG_INFO, ("%s: close reason=%s state %d (%s) -> %d (%s)\n",
donatien 0:b802fc31f1db 319 PROTO_NAME(f), reason, oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 320 }
donatien 0:b802fc31f1db 321
donatien 0:b802fc31f1db 322
donatien 0:b802fc31f1db 323 /*
donatien 0:b802fc31f1db 324 * fsm_timeout - Timeout expired.
donatien 0:b802fc31f1db 325 */
donatien 0:b802fc31f1db 326 static void
donatien 0:b802fc31f1db 327 fsm_timeout(void *arg)
donatien 0:b802fc31f1db 328 {
donatien 0:b802fc31f1db 329 fsm *f = (fsm *) arg;
donatien 0:b802fc31f1db 330
donatien 0:b802fc31f1db 331 switch (f->state) {
donatien 0:b802fc31f1db 332 case LS_CLOSING:
donatien 0:b802fc31f1db 333 case LS_STOPPING:
donatien 0:b802fc31f1db 334 if( f->retransmits <= 0 ) {
donatien 0:b802fc31f1db 335 FSMDEBUG(LOG_WARNING, ("%s: timeout sending Terminate-Request state=%d (%s)\n",
donatien 0:b802fc31f1db 336 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 337 /*
donatien 0:b802fc31f1db 338 * We've waited for an ack long enough. Peer probably heard us.
donatien 0:b802fc31f1db 339 */
donatien 0:b802fc31f1db 340 f->state = (f->state == LS_CLOSING)? LS_CLOSED: LS_STOPPED;
donatien 0:b802fc31f1db 341 if( f->callbacks->finished ) {
donatien 0:b802fc31f1db 342 (*f->callbacks->finished)(f);
donatien 0:b802fc31f1db 343 }
donatien 0:b802fc31f1db 344 } else {
donatien 0:b802fc31f1db 345 FSMDEBUG(LOG_WARNING, ("%s: timeout resending Terminate-Requests state=%d (%s)\n",
donatien 0:b802fc31f1db 346 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 347 /* Send Terminate-Request */
donatien 0:b802fc31f1db 348 fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
donatien 0:b802fc31f1db 349 (u_char *) f->term_reason, f->term_reason_len);
donatien 0:b802fc31f1db 350 TIMEOUT(fsm_timeout, f, f->timeouttime);
donatien 0:b802fc31f1db 351 --f->retransmits;
donatien 0:b802fc31f1db 352 }
donatien 0:b802fc31f1db 353 break;
donatien 0:b802fc31f1db 354
donatien 0:b802fc31f1db 355 case LS_REQSENT:
donatien 0:b802fc31f1db 356 case LS_ACKRCVD:
donatien 0:b802fc31f1db 357 case LS_ACKSENT:
donatien 0:b802fc31f1db 358 if (f->retransmits <= 0) {
donatien 0:b802fc31f1db 359 FSMDEBUG(LOG_WARNING, ("%s: timeout sending Config-Requests state=%d (%s)\n",
donatien 0:b802fc31f1db 360 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 361 f->state = LS_STOPPED;
donatien 0:b802fc31f1db 362 if( (f->flags & OPT_PASSIVE) == 0 && f->callbacks->finished ) {
donatien 0:b802fc31f1db 363 (*f->callbacks->finished)(f);
donatien 0:b802fc31f1db 364 }
donatien 0:b802fc31f1db 365 } else {
donatien 0:b802fc31f1db 366 FSMDEBUG(LOG_WARNING, ("%s: timeout resending Config-Request state=%d (%s)\n",
donatien 0:b802fc31f1db 367 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 368 /* Retransmit the configure-request */
donatien 0:b802fc31f1db 369 if (f->callbacks->retransmit) {
donatien 0:b802fc31f1db 370 (*f->callbacks->retransmit)(f);
donatien 0:b802fc31f1db 371 }
donatien 0:b802fc31f1db 372 fsm_sconfreq(f, 1); /* Re-send Configure-Request */
donatien 0:b802fc31f1db 373 if( f->state == LS_ACKRCVD ) {
donatien 0:b802fc31f1db 374 f->state = LS_REQSENT;
donatien 0:b802fc31f1db 375 }
donatien 0:b802fc31f1db 376 }
donatien 0:b802fc31f1db 377 break;
donatien 0:b802fc31f1db 378
donatien 0:b802fc31f1db 379 default:
donatien 0:b802fc31f1db 380 FSMDEBUG(LOG_INFO, ("%s: UNHANDLED timeout event in state %d (%s)!\n",
donatien 0:b802fc31f1db 381 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 382 }
donatien 0:b802fc31f1db 383 }
donatien 0:b802fc31f1db 384
donatien 0:b802fc31f1db 385
donatien 0:b802fc31f1db 386 /*
donatien 0:b802fc31f1db 387 * fsm_input - Input packet.
donatien 0:b802fc31f1db 388 */
donatien 0:b802fc31f1db 389 void
donatien 0:b802fc31f1db 390 fsm_input(fsm *f, u_char *inpacket, int l)
donatien 0:b802fc31f1db 391 {
donatien 0:b802fc31f1db 392 u_char *inp = inpacket;
donatien 0:b802fc31f1db 393 u_char code, id;
donatien 0:b802fc31f1db 394 int len;
donatien 0:b802fc31f1db 395
donatien 0:b802fc31f1db 396 /*
donatien 0:b802fc31f1db 397 * Parse header (code, id and length).
donatien 0:b802fc31f1db 398 * If packet too short, drop it.
donatien 0:b802fc31f1db 399 */
donatien 0:b802fc31f1db 400 if (l < HEADERLEN) {
donatien 0:b802fc31f1db 401 FSMDEBUG(LOG_WARNING, ("fsm_input(%x): Rcvd short header.\n",
donatien 0:b802fc31f1db 402 f->protocol));
donatien 0:b802fc31f1db 403 return;
donatien 0:b802fc31f1db 404 }
donatien 0:b802fc31f1db 405 GETCHAR(code, inp);
donatien 0:b802fc31f1db 406 GETCHAR(id, inp);
donatien 0:b802fc31f1db 407 GETSHORT(len, inp);
donatien 0:b802fc31f1db 408 if (len < HEADERLEN) {
donatien 0:b802fc31f1db 409 FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd illegal length.\n",
donatien 0:b802fc31f1db 410 f->protocol));
donatien 0:b802fc31f1db 411 return;
donatien 0:b802fc31f1db 412 }
donatien 0:b802fc31f1db 413 if (len > l) {
donatien 0:b802fc31f1db 414 FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd short packet.\n",
donatien 0:b802fc31f1db 415 f->protocol));
donatien 0:b802fc31f1db 416 return;
donatien 0:b802fc31f1db 417 }
donatien 0:b802fc31f1db 418 len -= HEADERLEN; /* subtract header length */
donatien 0:b802fc31f1db 419
donatien 0:b802fc31f1db 420 if( f->state == LS_INITIAL || f->state == LS_STARTING ) {
donatien 0:b802fc31f1db 421 FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd packet in state %d (%s).\n",
donatien 0:b802fc31f1db 422 f->protocol, f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 423 return;
donatien 0:b802fc31f1db 424 }
donatien 0:b802fc31f1db 425 FSMDEBUG(LOG_INFO, ("fsm_input(%s):%d,%d,%d\n", PROTO_NAME(f), code, id, l));
donatien 0:b802fc31f1db 426 /*
donatien 0:b802fc31f1db 427 * Action depends on code.
donatien 0:b802fc31f1db 428 */
donatien 0:b802fc31f1db 429 switch (code) {
donatien 0:b802fc31f1db 430 case CONFREQ:
donatien 0:b802fc31f1db 431 fsm_rconfreq(f, id, inp, len);
donatien 0:b802fc31f1db 432 break;
donatien 0:b802fc31f1db 433
donatien 0:b802fc31f1db 434 case CONFACK:
donatien 0:b802fc31f1db 435 fsm_rconfack(f, id, inp, len);
donatien 0:b802fc31f1db 436 break;
donatien 0:b802fc31f1db 437
donatien 0:b802fc31f1db 438 case CONFNAK:
donatien 0:b802fc31f1db 439 case CONFREJ:
donatien 0:b802fc31f1db 440 fsm_rconfnakrej(f, code, id, inp, len);
donatien 0:b802fc31f1db 441 break;
donatien 0:b802fc31f1db 442
donatien 0:b802fc31f1db 443 case TERMREQ:
donatien 0:b802fc31f1db 444 fsm_rtermreq(f, id, inp, len);
donatien 0:b802fc31f1db 445 break;
donatien 0:b802fc31f1db 446
donatien 0:b802fc31f1db 447 case TERMACK:
donatien 0:b802fc31f1db 448 fsm_rtermack(f);
donatien 0:b802fc31f1db 449 break;
donatien 0:b802fc31f1db 450
donatien 0:b802fc31f1db 451 case CODEREJ:
donatien 0:b802fc31f1db 452 fsm_rcoderej(f, inp, len);
donatien 0:b802fc31f1db 453 break;
donatien 0:b802fc31f1db 454
donatien 0:b802fc31f1db 455 default:
donatien 0:b802fc31f1db 456 FSMDEBUG(LOG_INFO, ("fsm_input(%s): default: \n", PROTO_NAME(f)));
donatien 0:b802fc31f1db 457 if( !f->callbacks->extcode ||
donatien 0:b802fc31f1db 458 !(*f->callbacks->extcode)(f, code, id, inp, len) ) {
donatien 0:b802fc31f1db 459 fsm_sdata(f, CODEREJ, ++f->id, inpacket, len + HEADERLEN);
donatien 0:b802fc31f1db 460 }
donatien 0:b802fc31f1db 461 break;
donatien 0:b802fc31f1db 462 }
donatien 0:b802fc31f1db 463 }
donatien 0:b802fc31f1db 464
donatien 0:b802fc31f1db 465
donatien 0:b802fc31f1db 466 /*
donatien 0:b802fc31f1db 467 * fsm_rconfreq - Receive Configure-Request.
donatien 0:b802fc31f1db 468 */
donatien 0:b802fc31f1db 469 static void
donatien 0:b802fc31f1db 470 fsm_rconfreq(fsm *f, u_char id, u_char *inp, int len)
donatien 0:b802fc31f1db 471 {
donatien 0:b802fc31f1db 472 int code, reject_if_disagree;
donatien 0:b802fc31f1db 473
donatien 0:b802fc31f1db 474 FSMDEBUG(LOG_INFO, ("fsm_rconfreq(%s): Rcvd id %d state=%d (%s)\n",
donatien 0:b802fc31f1db 475 PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 476 switch( f->state ) {
donatien 0:b802fc31f1db 477 case LS_CLOSED:
donatien 0:b802fc31f1db 478 /* Go away, we're closed */
donatien 0:b802fc31f1db 479 fsm_sdata(f, TERMACK, id, NULL, 0);
donatien 0:b802fc31f1db 480 return;
donatien 0:b802fc31f1db 481 case LS_CLOSING:
donatien 0:b802fc31f1db 482 case LS_STOPPING:
donatien 0:b802fc31f1db 483 return;
donatien 0:b802fc31f1db 484
donatien 0:b802fc31f1db 485 case LS_OPENED:
donatien 0:b802fc31f1db 486 /* Go down and restart negotiation */
donatien 0:b802fc31f1db 487 if( f->callbacks->down ) {
donatien 0:b802fc31f1db 488 (*f->callbacks->down)(f); /* Inform upper layers */
donatien 0:b802fc31f1db 489 }
donatien 0:b802fc31f1db 490 fsm_sconfreq(f, 0); /* Send initial Configure-Request */
donatien 0:b802fc31f1db 491 break;
donatien 0:b802fc31f1db 492
donatien 0:b802fc31f1db 493 case LS_STOPPED:
donatien 0:b802fc31f1db 494 /* Negotiation started by our peer */
donatien 0:b802fc31f1db 495 fsm_sconfreq(f, 0); /* Send initial Configure-Request */
donatien 0:b802fc31f1db 496 f->state = LS_REQSENT;
donatien 0:b802fc31f1db 497 break;
donatien 0:b802fc31f1db 498 }
donatien 0:b802fc31f1db 499
donatien 0:b802fc31f1db 500 /*
donatien 0:b802fc31f1db 501 * Pass the requested configuration options
donatien 0:b802fc31f1db 502 * to protocol-specific code for checking.
donatien 0:b802fc31f1db 503 */
donatien 0:b802fc31f1db 504 if (f->callbacks->reqci) { /* Check CI */
donatien 0:b802fc31f1db 505 reject_if_disagree = (f->nakloops >= f->maxnakloops);
donatien 0:b802fc31f1db 506 code = (*f->callbacks->reqci)(f, inp, &len, reject_if_disagree);
donatien 0:b802fc31f1db 507 } else if (len) {
donatien 0:b802fc31f1db 508 code = CONFREJ; /* Reject all CI */
donatien 0:b802fc31f1db 509 } else {
donatien 0:b802fc31f1db 510 code = CONFACK;
donatien 0:b802fc31f1db 511 }
donatien 0:b802fc31f1db 512
donatien 0:b802fc31f1db 513 /* send the Ack, Nak or Rej to the peer */
donatien 0:b802fc31f1db 514 fsm_sdata(f, (u_char)code, id, inp, len);
donatien 0:b802fc31f1db 515
donatien 0:b802fc31f1db 516 if (code == CONFACK) {
donatien 0:b802fc31f1db 517 if (f->state == LS_ACKRCVD) {
donatien 0:b802fc31f1db 518 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien 0:b802fc31f1db 519 f->state = LS_OPENED;
donatien 0:b802fc31f1db 520 if (f->callbacks->up) {
donatien 0:b802fc31f1db 521 (*f->callbacks->up)(f); /* Inform upper layers */
donatien 0:b802fc31f1db 522 }
donatien 0:b802fc31f1db 523 } else {
donatien 0:b802fc31f1db 524 f->state = LS_ACKSENT;
donatien 0:b802fc31f1db 525 }
donatien 0:b802fc31f1db 526 f->nakloops = 0;
donatien 0:b802fc31f1db 527 } else {
donatien 0:b802fc31f1db 528 /* we sent CONFACK or CONFREJ */
donatien 0:b802fc31f1db 529 if (f->state != LS_ACKRCVD) {
donatien 0:b802fc31f1db 530 f->state = LS_REQSENT;
donatien 0:b802fc31f1db 531 }
donatien 0:b802fc31f1db 532 if( code == CONFNAK ) {
donatien 0:b802fc31f1db 533 ++f->nakloops;
donatien 0:b802fc31f1db 534 }
donatien 0:b802fc31f1db 535 }
donatien 0:b802fc31f1db 536 }
donatien 0:b802fc31f1db 537
donatien 0:b802fc31f1db 538
donatien 0:b802fc31f1db 539 /*
donatien 0:b802fc31f1db 540 * fsm_rconfack - Receive Configure-Ack.
donatien 0:b802fc31f1db 541 */
donatien 0:b802fc31f1db 542 static void
donatien 0:b802fc31f1db 543 fsm_rconfack(fsm *f, int id, u_char *inp, int len)
donatien 0:b802fc31f1db 544 {
donatien 0:b802fc31f1db 545 FSMDEBUG(LOG_INFO, ("fsm_rconfack(%s): Rcvd id %d state=%d (%s)\n",
donatien 0:b802fc31f1db 546 PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 547
donatien 0:b802fc31f1db 548 if (id != f->reqid || f->seen_ack) { /* Expected id? */
donatien 0:b802fc31f1db 549 return; /* Nope, toss... */
donatien 0:b802fc31f1db 550 }
donatien 0:b802fc31f1db 551 if( !(f->callbacks->ackci? (*f->callbacks->ackci)(f, inp, len): (len == 0)) ) {
donatien 0:b802fc31f1db 552 /* Ack is bad - ignore it */
donatien 0:b802fc31f1db 553 FSMDEBUG(LOG_INFO, ("%s: received bad Ack (length %d)\n",
donatien 0:b802fc31f1db 554 PROTO_NAME(f), len));
donatien 0:b802fc31f1db 555 return;
donatien 0:b802fc31f1db 556 }
donatien 0:b802fc31f1db 557 f->seen_ack = 1;
donatien 0:b802fc31f1db 558
donatien 0:b802fc31f1db 559 switch (f->state) {
donatien 0:b802fc31f1db 560 case LS_CLOSED:
donatien 0:b802fc31f1db 561 case LS_STOPPED:
donatien 0:b802fc31f1db 562 fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
donatien 0:b802fc31f1db 563 break;
donatien 0:b802fc31f1db 564
donatien 0:b802fc31f1db 565 case LS_REQSENT:
donatien 0:b802fc31f1db 566 f->state = LS_ACKRCVD;
donatien 0:b802fc31f1db 567 f->retransmits = f->maxconfreqtransmits;
donatien 0:b802fc31f1db 568 break;
donatien 0:b802fc31f1db 569
donatien 0:b802fc31f1db 570 case LS_ACKRCVD:
donatien 0:b802fc31f1db 571 /* Huh? an extra valid Ack? oh well... */
donatien 0:b802fc31f1db 572 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien 0:b802fc31f1db 573 fsm_sconfreq(f, 0);
donatien 0:b802fc31f1db 574 f->state = LS_REQSENT;
donatien 0:b802fc31f1db 575 break;
donatien 0:b802fc31f1db 576
donatien 0:b802fc31f1db 577 case LS_ACKSENT:
donatien 0:b802fc31f1db 578 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien 0:b802fc31f1db 579 f->state = LS_OPENED;
donatien 0:b802fc31f1db 580 f->retransmits = f->maxconfreqtransmits;
donatien 0:b802fc31f1db 581 if (f->callbacks->up) {
donatien 0:b802fc31f1db 582 (*f->callbacks->up)(f); /* Inform upper layers */
donatien 0:b802fc31f1db 583 }
donatien 0:b802fc31f1db 584 break;
donatien 0:b802fc31f1db 585
donatien 0:b802fc31f1db 586 case LS_OPENED:
donatien 0:b802fc31f1db 587 /* Go down and restart negotiation */
donatien 0:b802fc31f1db 588 if (f->callbacks->down) {
donatien 0:b802fc31f1db 589 (*f->callbacks->down)(f); /* Inform upper layers */
donatien 0:b802fc31f1db 590 }
donatien 0:b802fc31f1db 591 fsm_sconfreq(f, 0); /* Send initial Configure-Request */
donatien 0:b802fc31f1db 592 f->state = LS_REQSENT;
donatien 0:b802fc31f1db 593 break;
donatien 0:b802fc31f1db 594 }
donatien 0:b802fc31f1db 595 }
donatien 0:b802fc31f1db 596
donatien 0:b802fc31f1db 597
donatien 0:b802fc31f1db 598 /*
donatien 0:b802fc31f1db 599 * fsm_rconfnakrej - Receive Configure-Nak or Configure-Reject.
donatien 0:b802fc31f1db 600 */
donatien 0:b802fc31f1db 601 static void
donatien 0:b802fc31f1db 602 fsm_rconfnakrej(fsm *f, int code, int id, u_char *inp, int len)
donatien 0:b802fc31f1db 603 {
donatien 0:b802fc31f1db 604 int (*proc) (fsm *, u_char *, int);
donatien 0:b802fc31f1db 605 int ret;
donatien 0:b802fc31f1db 606
donatien 0:b802fc31f1db 607 FSMDEBUG(LOG_INFO, ("fsm_rconfnakrej(%s): Rcvd id %d state=%d (%s)\n",
donatien 0:b802fc31f1db 608 PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 609
donatien 0:b802fc31f1db 610 if (id != f->reqid || f->seen_ack) { /* Expected id? */
donatien 0:b802fc31f1db 611 return; /* Nope, toss... */
donatien 0:b802fc31f1db 612 }
donatien 0:b802fc31f1db 613 proc = (code == CONFNAK)? f->callbacks->nakci: f->callbacks->rejci;
donatien 0:b802fc31f1db 614 if (!proc || !((ret = proc(f, inp, len)))) {
donatien 0:b802fc31f1db 615 /* Nak/reject is bad - ignore it */
donatien 0:b802fc31f1db 616 FSMDEBUG(LOG_INFO, ("%s: received bad %s (length %d)\n",
donatien 0:b802fc31f1db 617 PROTO_NAME(f), (code==CONFNAK? "Nak": "reject"), len));
donatien 0:b802fc31f1db 618 return;
donatien 0:b802fc31f1db 619 }
donatien 0:b802fc31f1db 620 f->seen_ack = 1;
donatien 0:b802fc31f1db 621
donatien 0:b802fc31f1db 622 switch (f->state) {
donatien 0:b802fc31f1db 623 case LS_CLOSED:
donatien 0:b802fc31f1db 624 case LS_STOPPED:
donatien 0:b802fc31f1db 625 fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
donatien 0:b802fc31f1db 626 break;
donatien 0:b802fc31f1db 627
donatien 0:b802fc31f1db 628 case LS_REQSENT:
donatien 0:b802fc31f1db 629 case LS_ACKSENT:
donatien 0:b802fc31f1db 630 /* They didn't agree to what we wanted - try another request */
donatien 0:b802fc31f1db 631 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien 0:b802fc31f1db 632 if (ret < 0) {
donatien 0:b802fc31f1db 633 f->state = LS_STOPPED; /* kludge for stopping CCP */
donatien 0:b802fc31f1db 634 } else {
donatien 0:b802fc31f1db 635 fsm_sconfreq(f, 0); /* Send Configure-Request */
donatien 0:b802fc31f1db 636 }
donatien 0:b802fc31f1db 637 break;
donatien 0:b802fc31f1db 638
donatien 0:b802fc31f1db 639 case LS_ACKRCVD:
donatien 0:b802fc31f1db 640 /* Got a Nak/reject when we had already had an Ack?? oh well... */
donatien 0:b802fc31f1db 641 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien 0:b802fc31f1db 642 fsm_sconfreq(f, 0);
donatien 0:b802fc31f1db 643 f->state = LS_REQSENT;
donatien 0:b802fc31f1db 644 break;
donatien 0:b802fc31f1db 645
donatien 0:b802fc31f1db 646 case LS_OPENED:
donatien 0:b802fc31f1db 647 /* Go down and restart negotiation */
donatien 0:b802fc31f1db 648 if (f->callbacks->down) {
donatien 0:b802fc31f1db 649 (*f->callbacks->down)(f); /* Inform upper layers */
donatien 0:b802fc31f1db 650 }
donatien 0:b802fc31f1db 651 fsm_sconfreq(f, 0); /* Send initial Configure-Request */
donatien 0:b802fc31f1db 652 f->state = LS_REQSENT;
donatien 0:b802fc31f1db 653 break;
donatien 0:b802fc31f1db 654 }
donatien 0:b802fc31f1db 655 }
donatien 0:b802fc31f1db 656
donatien 0:b802fc31f1db 657
donatien 0:b802fc31f1db 658 /*
donatien 0:b802fc31f1db 659 * fsm_rtermreq - Receive Terminate-Req.
donatien 0:b802fc31f1db 660 */
donatien 0:b802fc31f1db 661 static void
donatien 0:b802fc31f1db 662 fsm_rtermreq(fsm *f, int id, u_char *p, int len)
donatien 0:b802fc31f1db 663 {
donatien 0:b802fc31f1db 664 LWIP_UNUSED_ARG(p);
donatien 0:b802fc31f1db 665
donatien 0:b802fc31f1db 666 FSMDEBUG(LOG_INFO, ("fsm_rtermreq(%s): Rcvd id %d state=%d (%s)\n",
donatien 0:b802fc31f1db 667 PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 668
donatien 0:b802fc31f1db 669 switch (f->state) {
donatien 0:b802fc31f1db 670 case LS_ACKRCVD:
donatien 0:b802fc31f1db 671 case LS_ACKSENT:
donatien 0:b802fc31f1db 672 f->state = LS_REQSENT; /* Start over but keep trying */
donatien 0:b802fc31f1db 673 break;
donatien 0:b802fc31f1db 674
donatien 0:b802fc31f1db 675 case LS_OPENED:
donatien 0:b802fc31f1db 676 if (len > 0) {
donatien 0:b802fc31f1db 677 FSMDEBUG(LOG_INFO, ("%s terminated by peer (%p)\n", PROTO_NAME(f), p));
donatien 0:b802fc31f1db 678 } else {
donatien 0:b802fc31f1db 679 FSMDEBUG(LOG_INFO, ("%s terminated by peer\n", PROTO_NAME(f)));
donatien 0:b802fc31f1db 680 }
donatien 0:b802fc31f1db 681 if (f->callbacks->down) {
donatien 0:b802fc31f1db 682 (*f->callbacks->down)(f); /* Inform upper layers */
donatien 0:b802fc31f1db 683 }
donatien 0:b802fc31f1db 684 f->retransmits = 0;
donatien 0:b802fc31f1db 685 f->state = LS_STOPPING;
donatien 0:b802fc31f1db 686 TIMEOUT(fsm_timeout, f, f->timeouttime);
donatien 0:b802fc31f1db 687 break;
donatien 0:b802fc31f1db 688 }
donatien 0:b802fc31f1db 689
donatien 0:b802fc31f1db 690 fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
donatien 0:b802fc31f1db 691 }
donatien 0:b802fc31f1db 692
donatien 0:b802fc31f1db 693
donatien 0:b802fc31f1db 694 /*
donatien 0:b802fc31f1db 695 * fsm_rtermack - Receive Terminate-Ack.
donatien 0:b802fc31f1db 696 */
donatien 0:b802fc31f1db 697 static void
donatien 0:b802fc31f1db 698 fsm_rtermack(fsm *f)
donatien 0:b802fc31f1db 699 {
donatien 0:b802fc31f1db 700 FSMDEBUG(LOG_INFO, ("fsm_rtermack(%s): state=%d (%s)\n",
donatien 0:b802fc31f1db 701 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 702
donatien 0:b802fc31f1db 703 switch (f->state) {
donatien 0:b802fc31f1db 704 case LS_CLOSING:
donatien 0:b802fc31f1db 705 UNTIMEOUT(fsm_timeout, f);
donatien 0:b802fc31f1db 706 f->state = LS_CLOSED;
donatien 0:b802fc31f1db 707 if( f->callbacks->finished ) {
donatien 0:b802fc31f1db 708 (*f->callbacks->finished)(f);
donatien 0:b802fc31f1db 709 }
donatien 0:b802fc31f1db 710 break;
donatien 0:b802fc31f1db 711
donatien 0:b802fc31f1db 712 case LS_STOPPING:
donatien 0:b802fc31f1db 713 UNTIMEOUT(fsm_timeout, f);
donatien 0:b802fc31f1db 714 f->state = LS_STOPPED;
donatien 0:b802fc31f1db 715 if( f->callbacks->finished ) {
donatien 0:b802fc31f1db 716 (*f->callbacks->finished)(f);
donatien 0:b802fc31f1db 717 }
donatien 0:b802fc31f1db 718 break;
donatien 0:b802fc31f1db 719
donatien 0:b802fc31f1db 720 case LS_ACKRCVD:
donatien 0:b802fc31f1db 721 f->state = LS_REQSENT;
donatien 0:b802fc31f1db 722 break;
donatien 0:b802fc31f1db 723
donatien 0:b802fc31f1db 724 case LS_OPENED:
donatien 0:b802fc31f1db 725 if (f->callbacks->down) {
donatien 0:b802fc31f1db 726 (*f->callbacks->down)(f); /* Inform upper layers */
donatien 0:b802fc31f1db 727 }
donatien 0:b802fc31f1db 728 fsm_sconfreq(f, 0);
donatien 0:b802fc31f1db 729 break;
donatien 0:b802fc31f1db 730 default:
donatien 0:b802fc31f1db 731 FSMDEBUG(LOG_INFO, ("fsm_rtermack(%s): UNHANDLED state=%d (%s)!!!\n",
donatien 0:b802fc31f1db 732 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 733 }
donatien 0:b802fc31f1db 734 }
donatien 0:b802fc31f1db 735
donatien 0:b802fc31f1db 736
donatien 0:b802fc31f1db 737 /*
donatien 0:b802fc31f1db 738 * fsm_rcoderej - Receive an Code-Reject.
donatien 0:b802fc31f1db 739 */
donatien 0:b802fc31f1db 740 static void
donatien 0:b802fc31f1db 741 fsm_rcoderej(fsm *f, u_char *inp, int len)
donatien 0:b802fc31f1db 742 {
donatien 0:b802fc31f1db 743 u_char code, id;
donatien 0:b802fc31f1db 744
donatien 0:b802fc31f1db 745 FSMDEBUG(LOG_INFO, ("fsm_rcoderej(%s): state=%d (%s)\n",
donatien 0:b802fc31f1db 746 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 747
donatien 0:b802fc31f1db 748 if (len < HEADERLEN) {
donatien 0:b802fc31f1db 749 FSMDEBUG(LOG_INFO, ("fsm_rcoderej: Rcvd short Code-Reject packet!\n"));
donatien 0:b802fc31f1db 750 return;
donatien 0:b802fc31f1db 751 }
donatien 0:b802fc31f1db 752 GETCHAR(code, inp);
donatien 0:b802fc31f1db 753 GETCHAR(id, inp);
donatien 0:b802fc31f1db 754 FSMDEBUG(LOG_WARNING, ("%s: Rcvd Code-Reject for code %d, id %d\n",
donatien 0:b802fc31f1db 755 PROTO_NAME(f), code, id));
donatien 0:b802fc31f1db 756
donatien 0:b802fc31f1db 757 if( f->state == LS_ACKRCVD ) {
donatien 0:b802fc31f1db 758 f->state = LS_REQSENT;
donatien 0:b802fc31f1db 759 }
donatien 0:b802fc31f1db 760 }
donatien 0:b802fc31f1db 761
donatien 0:b802fc31f1db 762
donatien 0:b802fc31f1db 763 /*
donatien 0:b802fc31f1db 764 * fsm_protreject - Peer doesn't speak this protocol.
donatien 0:b802fc31f1db 765 *
donatien 0:b802fc31f1db 766 * Treat this as a catastrophic error (RXJ-).
donatien 0:b802fc31f1db 767 */
donatien 0:b802fc31f1db 768 void
donatien 0:b802fc31f1db 769 fsm_protreject(fsm *f)
donatien 0:b802fc31f1db 770 {
donatien 0:b802fc31f1db 771 switch( f->state ) {
donatien 0:b802fc31f1db 772 case LS_CLOSING:
donatien 0:b802fc31f1db 773 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien 0:b802fc31f1db 774 /* fall through */
donatien 0:b802fc31f1db 775 case LS_CLOSED:
donatien 0:b802fc31f1db 776 f->state = LS_CLOSED;
donatien 0:b802fc31f1db 777 if( f->callbacks->finished ) {
donatien 0:b802fc31f1db 778 (*f->callbacks->finished)(f);
donatien 0:b802fc31f1db 779 }
donatien 0:b802fc31f1db 780 break;
donatien 0:b802fc31f1db 781
donatien 0:b802fc31f1db 782 case LS_STOPPING:
donatien 0:b802fc31f1db 783 case LS_REQSENT:
donatien 0:b802fc31f1db 784 case LS_ACKRCVD:
donatien 0:b802fc31f1db 785 case LS_ACKSENT:
donatien 0:b802fc31f1db 786 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
donatien 0:b802fc31f1db 787 /* fall through */
donatien 0:b802fc31f1db 788 case LS_STOPPED:
donatien 0:b802fc31f1db 789 f->state = LS_STOPPED;
donatien 0:b802fc31f1db 790 if( f->callbacks->finished ) {
donatien 0:b802fc31f1db 791 (*f->callbacks->finished)(f);
donatien 0:b802fc31f1db 792 }
donatien 0:b802fc31f1db 793 break;
donatien 0:b802fc31f1db 794
donatien 0:b802fc31f1db 795 case LS_OPENED:
donatien 0:b802fc31f1db 796 if( f->callbacks->down ) {
donatien 0:b802fc31f1db 797 (*f->callbacks->down)(f);
donatien 0:b802fc31f1db 798 }
donatien 0:b802fc31f1db 799 /* Init restart counter, send Terminate-Request */
donatien 0:b802fc31f1db 800 f->retransmits = f->maxtermtransmits;
donatien 0:b802fc31f1db 801 fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
donatien 0:b802fc31f1db 802 (u_char *) f->term_reason, f->term_reason_len);
donatien 0:b802fc31f1db 803 TIMEOUT(fsm_timeout, f, f->timeouttime);
donatien 0:b802fc31f1db 804 --f->retransmits;
donatien 0:b802fc31f1db 805
donatien 0:b802fc31f1db 806 f->state = LS_STOPPING;
donatien 0:b802fc31f1db 807 break;
donatien 0:b802fc31f1db 808
donatien 0:b802fc31f1db 809 default:
donatien 0:b802fc31f1db 810 FSMDEBUG(LOG_INFO, ("%s: Protocol-reject event in state %d (%s)!\n",
donatien 0:b802fc31f1db 811 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
donatien 0:b802fc31f1db 812 }
donatien 0:b802fc31f1db 813 }
donatien 0:b802fc31f1db 814
donatien 0:b802fc31f1db 815
donatien 0:b802fc31f1db 816 /*
donatien 0:b802fc31f1db 817 * fsm_sconfreq - Send a Configure-Request.
donatien 0:b802fc31f1db 818 */
donatien 0:b802fc31f1db 819 static void
donatien 0:b802fc31f1db 820 fsm_sconfreq(fsm *f, int retransmit)
donatien 0:b802fc31f1db 821 {
donatien 0:b802fc31f1db 822 u_char *outp;
donatien 0:b802fc31f1db 823 int cilen;
donatien 0:b802fc31f1db 824
donatien 0:b802fc31f1db 825 if( f->state != LS_REQSENT && f->state != LS_ACKRCVD && f->state != LS_ACKSENT ) {
donatien 0:b802fc31f1db 826 /* Not currently negotiating - reset options */
donatien 0:b802fc31f1db 827 if( f->callbacks->resetci ) {
donatien 0:b802fc31f1db 828 (*f->callbacks->resetci)(f);
donatien 0:b802fc31f1db 829 }
donatien 0:b802fc31f1db 830 f->nakloops = 0;
donatien 0:b802fc31f1db 831 }
donatien 0:b802fc31f1db 832
donatien 0:b802fc31f1db 833 if( !retransmit ) {
donatien 0:b802fc31f1db 834 /* New request - reset retransmission counter, use new ID */
donatien 0:b802fc31f1db 835 f->retransmits = f->maxconfreqtransmits;
donatien 0:b802fc31f1db 836 f->reqid = ++f->id;
donatien 0:b802fc31f1db 837 }
donatien 0:b802fc31f1db 838
donatien 0:b802fc31f1db 839 f->seen_ack = 0;
donatien 0:b802fc31f1db 840
donatien 0:b802fc31f1db 841 /*
donatien 0:b802fc31f1db 842 * Make up the request packet
donatien 0:b802fc31f1db 843 */
donatien 0:b802fc31f1db 844 outp = outpacket_buf[f->unit] + PPP_HDRLEN + HEADERLEN;
donatien 0:b802fc31f1db 845 if( f->callbacks->cilen && f->callbacks->addci ) {
donatien 0:b802fc31f1db 846 cilen = (*f->callbacks->cilen)(f);
donatien 0:b802fc31f1db 847 if( cilen > peer_mru[f->unit] - (int)HEADERLEN ) {
donatien 0:b802fc31f1db 848 cilen = peer_mru[f->unit] - HEADERLEN;
donatien 0:b802fc31f1db 849 }
donatien 0:b802fc31f1db 850 if (f->callbacks->addci) {
donatien 0:b802fc31f1db 851 (*f->callbacks->addci)(f, outp, &cilen);
donatien 0:b802fc31f1db 852 }
donatien 0:b802fc31f1db 853 } else {
donatien 0:b802fc31f1db 854 cilen = 0;
donatien 0:b802fc31f1db 855 }
donatien 0:b802fc31f1db 856
donatien 0:b802fc31f1db 857 /* send the request to our peer */
donatien 0:b802fc31f1db 858 fsm_sdata(f, CONFREQ, f->reqid, outp, cilen);
donatien 0:b802fc31f1db 859
donatien 0:b802fc31f1db 860 /* start the retransmit timer */
donatien 0:b802fc31f1db 861 --f->retransmits;
donatien 0:b802fc31f1db 862 TIMEOUT(fsm_timeout, f, f->timeouttime);
donatien 0:b802fc31f1db 863
donatien 0:b802fc31f1db 864 FSMDEBUG(LOG_INFO, ("%s: sending Configure-Request, id %d\n",
donatien 0:b802fc31f1db 865 PROTO_NAME(f), f->reqid));
donatien 0:b802fc31f1db 866 }
donatien 0:b802fc31f1db 867
donatien 0:b802fc31f1db 868
donatien 0:b802fc31f1db 869 /*
donatien 0:b802fc31f1db 870 * fsm_sdata - Send some data.
donatien 0:b802fc31f1db 871 *
donatien 0:b802fc31f1db 872 * Used for all packets sent to our peer by this module.
donatien 0:b802fc31f1db 873 */
donatien 0:b802fc31f1db 874 void
donatien 0:b802fc31f1db 875 fsm_sdata( fsm *f, u_char code, u_char id, u_char *data, int datalen)
donatien 0:b802fc31f1db 876 {
donatien 0:b802fc31f1db 877 u_char *outp;
donatien 0:b802fc31f1db 878 int outlen;
donatien 0:b802fc31f1db 879
donatien 0:b802fc31f1db 880 /* Adjust length to be smaller than MTU */
donatien 0:b802fc31f1db 881 outp = outpacket_buf[f->unit];
donatien 0:b802fc31f1db 882 if (datalen > peer_mru[f->unit] - (int)HEADERLEN) {
donatien 0:b802fc31f1db 883 datalen = peer_mru[f->unit] - HEADERLEN;
donatien 0:b802fc31f1db 884 }
donatien 0:b802fc31f1db 885 if (datalen && data != outp + PPP_HDRLEN + HEADERLEN) {
donatien 0:b802fc31f1db 886 BCOPY(data, outp + PPP_HDRLEN + HEADERLEN, datalen);
donatien 0:b802fc31f1db 887 }
donatien 0:b802fc31f1db 888 outlen = datalen + HEADERLEN;
donatien 0:b802fc31f1db 889 MAKEHEADER(outp, f->protocol);
donatien 0:b802fc31f1db 890 PUTCHAR(code, outp);
donatien 0:b802fc31f1db 891 PUTCHAR(id, outp);
donatien 0:b802fc31f1db 892 PUTSHORT(outlen, outp);
donatien 0:b802fc31f1db 893 pppWrite(f->unit, outpacket_buf[f->unit], outlen + PPP_HDRLEN);
donatien 0:b802fc31f1db 894 FSMDEBUG(LOG_INFO, ("fsm_sdata(%s): Sent code %d,%d,%d.\n",
donatien 0:b802fc31f1db 895 PROTO_NAME(f), code, id, outlen));
donatien 0:b802fc31f1db 896 }
donatien 0:b802fc31f1db 897
donatien 0:b802fc31f1db 898 #endif /* PPP_SUPPORT */