CK Sin / Mbed 2 deprecated Ethernetwebsocket

Ethernetwebsoc

Dependencies:   C12832_lcd LM75B WebSocketClient mbed-rtos mbed Socket lwip-eth lwip-sys lwip

EthernetInterface/lwip/netif/ppp/fsm.c@0:0ed2a7c7190c, 2013-05-31 (annotated)

Committer:
GordonSin
Date:
Fri May 31 04:09:54 2013 +0000
Revision:
0:0ed2a7c7190c
31/5/2013;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
GordonSin 0:0ed2a7c7190c 1 /*****************************************************************************
GordonSin 0:0ed2a7c7190c 2 * fsm.c - Network Control Protocol Finite State Machine program file.
GordonSin 0:0ed2a7c7190c 3 *
GordonSin 0:0ed2a7c7190c 4 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
GordonSin 0:0ed2a7c7190c 5 * portions Copyright (c) 1997 by Global Election Systems Inc.
GordonSin 0:0ed2a7c7190c 6 *
GordonSin 0:0ed2a7c7190c 7 * The authors hereby grant permission to use, copy, modify, distribute,
GordonSin 0:0ed2a7c7190c 8 * and license this software and its documentation for any purpose, provided
GordonSin 0:0ed2a7c7190c 9 * that existing copyright notices are retained in all copies and that this
GordonSin 0:0ed2a7c7190c 10 * notice and the following disclaimer are included verbatim in any
GordonSin 0:0ed2a7c7190c 11 * distributions. No written agreement, license, or royalty fee is required
GordonSin 0:0ed2a7c7190c 12 * for any of the authorized uses.
GordonSin 0:0ed2a7c7190c 13 *
GordonSin 0:0ed2a7c7190c 14 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
GordonSin 0:0ed2a7c7190c 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
GordonSin 0:0ed2a7c7190c 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
GordonSin 0:0ed2a7c7190c 17 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
GordonSin 0:0ed2a7c7190c 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
GordonSin 0:0ed2a7c7190c 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
GordonSin 0:0ed2a7c7190c 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
GordonSin 0:0ed2a7c7190c 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
GordonSin 0:0ed2a7c7190c 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
GordonSin 0:0ed2a7c7190c 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
GordonSin 0:0ed2a7c7190c 24 *
GordonSin 0:0ed2a7c7190c 25 ******************************************************************************
GordonSin 0:0ed2a7c7190c 26 * REVISION HISTORY
GordonSin 0:0ed2a7c7190c 27 *
GordonSin 0:0ed2a7c7190c 28 * 03-01-01 Marc Boucher <marc@mbsi.ca>
GordonSin 0:0ed2a7c7190c 29 * Ported to lwIP.
GordonSin 0:0ed2a7c7190c 30 * 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
GordonSin 0:0ed2a7c7190c 31 * Original based on BSD fsm.c.
GordonSin 0:0ed2a7c7190c 32 *****************************************************************************/
GordonSin 0:0ed2a7c7190c 33 /*
GordonSin 0:0ed2a7c7190c 34 * fsm.c - {Link, IP} Control Protocol Finite State Machine.
GordonSin 0:0ed2a7c7190c 35 *
GordonSin 0:0ed2a7c7190c 36 * Copyright (c) 1989 Carnegie Mellon University.
GordonSin 0:0ed2a7c7190c 37 * All rights reserved.
GordonSin 0:0ed2a7c7190c 38 *
GordonSin 0:0ed2a7c7190c 39 * Redistribution and use in source and binary forms are permitted
GordonSin 0:0ed2a7c7190c 40 * provided that the above copyright notice and this paragraph are
GordonSin 0:0ed2a7c7190c 41 * duplicated in all such forms and that any documentation,
GordonSin 0:0ed2a7c7190c 42 * advertising materials, and other materials related to such
GordonSin 0:0ed2a7c7190c 43 * distribution and use acknowledge that the software was developed
GordonSin 0:0ed2a7c7190c 44 * by Carnegie Mellon University. The name of the
GordonSin 0:0ed2a7c7190c 45 * University may not be used to endorse or promote products derived
GordonSin 0:0ed2a7c7190c 46 * from this software without specific prior written permission.
GordonSin 0:0ed2a7c7190c 47 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
GordonSin 0:0ed2a7c7190c 48 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
GordonSin 0:0ed2a7c7190c 49 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
GordonSin 0:0ed2a7c7190c 50 */
GordonSin 0:0ed2a7c7190c 51
GordonSin 0:0ed2a7c7190c 52 /*
GordonSin 0:0ed2a7c7190c 53 * TODO:
GordonSin 0:0ed2a7c7190c 54 * Randomize fsm id on link/init.
GordonSin 0:0ed2a7c7190c 55 * Deal with variable outgoing MTU.
GordonSin 0:0ed2a7c7190c 56 */
GordonSin 0:0ed2a7c7190c 57
GordonSin 0:0ed2a7c7190c 58 #include "lwip/opt.h"
GordonSin 0:0ed2a7c7190c 59
GordonSin 0:0ed2a7c7190c 60 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
GordonSin 0:0ed2a7c7190c 61
GordonSin 0:0ed2a7c7190c 62 #include "ppp.h"
GordonSin 0:0ed2a7c7190c 63 #include "pppdebug.h"
GordonSin 0:0ed2a7c7190c 64
GordonSin 0:0ed2a7c7190c 65 #include "fsm.h"
GordonSin 0:0ed2a7c7190c 66
GordonSin 0:0ed2a7c7190c 67 #include <string.h>
GordonSin 0:0ed2a7c7190c 68
GordonSin 0:0ed2a7c7190c 69 #if PPP_DEBUG
GordonSin 0:0ed2a7c7190c 70 static const char *ppperr_strerr[] = {
GordonSin 0:0ed2a7c7190c 71 "LS_INITIAL", /* LS_INITIAL 0 */
GordonSin 0:0ed2a7c7190c 72 "LS_STARTING", /* LS_STARTING 1 */
GordonSin 0:0ed2a7c7190c 73 "LS_CLOSED", /* LS_CLOSED 2 */
GordonSin 0:0ed2a7c7190c 74 "LS_STOPPED", /* LS_STOPPED 3 */
GordonSin 0:0ed2a7c7190c 75 "LS_CLOSING", /* LS_CLOSING 4 */
GordonSin 0:0ed2a7c7190c 76 "LS_STOPPING", /* LS_STOPPING 5 */
GordonSin 0:0ed2a7c7190c 77 "LS_REQSENT", /* LS_REQSENT 6 */
GordonSin 0:0ed2a7c7190c 78 "LS_ACKRCVD", /* LS_ACKRCVD 7 */
GordonSin 0:0ed2a7c7190c 79 "LS_ACKSENT", /* LS_ACKSENT 8 */
GordonSin 0:0ed2a7c7190c 80 "LS_OPENED" /* LS_OPENED 9 */
GordonSin 0:0ed2a7c7190c 81 };
GordonSin 0:0ed2a7c7190c 82 #endif /* PPP_DEBUG */
GordonSin 0:0ed2a7c7190c 83
GordonSin 0:0ed2a7c7190c 84 static void fsm_timeout (void *);
GordonSin 0:0ed2a7c7190c 85 static void fsm_rconfreq (fsm *, u_char, u_char *, int);
GordonSin 0:0ed2a7c7190c 86 static void fsm_rconfack (fsm *, int, u_char *, int);
GordonSin 0:0ed2a7c7190c 87 static void fsm_rconfnakrej (fsm *, int, int, u_char *, int);
GordonSin 0:0ed2a7c7190c 88 static void fsm_rtermreq (fsm *, int, u_char *, int);
GordonSin 0:0ed2a7c7190c 89 static void fsm_rtermack (fsm *);
GordonSin 0:0ed2a7c7190c 90 static void fsm_rcoderej (fsm *, u_char *, int);
GordonSin 0:0ed2a7c7190c 91 static void fsm_sconfreq (fsm *, int);
GordonSin 0:0ed2a7c7190c 92
GordonSin 0:0ed2a7c7190c 93 #define PROTO_NAME(f) ((f)->callbacks->proto_name)
GordonSin 0:0ed2a7c7190c 94
GordonSin 0:0ed2a7c7190c 95 int peer_mru[NUM_PPP];
GordonSin 0:0ed2a7c7190c 96
GordonSin 0:0ed2a7c7190c 97
GordonSin 0:0ed2a7c7190c 98 /*
GordonSin 0:0ed2a7c7190c 99 * fsm_init - Initialize fsm.
GordonSin 0:0ed2a7c7190c 100 *
GordonSin 0:0ed2a7c7190c 101 * Initialize fsm state.
GordonSin 0:0ed2a7c7190c 102 */
GordonSin 0:0ed2a7c7190c 103 void
GordonSin 0:0ed2a7c7190c 104 fsm_init(fsm *f)
GordonSin 0:0ed2a7c7190c 105 {
GordonSin 0:0ed2a7c7190c 106 f->state = LS_INITIAL;
GordonSin 0:0ed2a7c7190c 107 f->flags = 0;
GordonSin 0:0ed2a7c7190c 108 f->id = 0; /* XXX Start with random id? */
GordonSin 0:0ed2a7c7190c 109 f->timeouttime = FSM_DEFTIMEOUT;
GordonSin 0:0ed2a7c7190c 110 f->maxconfreqtransmits = FSM_DEFMAXCONFREQS;
GordonSin 0:0ed2a7c7190c 111 f->maxtermtransmits = FSM_DEFMAXTERMREQS;
GordonSin 0:0ed2a7c7190c 112 f->maxnakloops = FSM_DEFMAXNAKLOOPS;
GordonSin 0:0ed2a7c7190c 113 f->term_reason_len = 0;
GordonSin 0:0ed2a7c7190c 114 }
GordonSin 0:0ed2a7c7190c 115
GordonSin 0:0ed2a7c7190c 116
GordonSin 0:0ed2a7c7190c 117 /*
GordonSin 0:0ed2a7c7190c 118 * fsm_lowerup - The lower layer is up.
GordonSin 0:0ed2a7c7190c 119 */
GordonSin 0:0ed2a7c7190c 120 void
GordonSin 0:0ed2a7c7190c 121 fsm_lowerup(fsm *f)
GordonSin 0:0ed2a7c7190c 122 {
GordonSin 0:0ed2a7c7190c 123 int oldState = f->state;
GordonSin 0:0ed2a7c7190c 124
GordonSin 0:0ed2a7c7190c 125 LWIP_UNUSED_ARG(oldState);
GordonSin 0:0ed2a7c7190c 126
GordonSin 0:0ed2a7c7190c 127 switch( f->state ) {
GordonSin 0:0ed2a7c7190c 128 case LS_INITIAL:
GordonSin 0:0ed2a7c7190c 129 f->state = LS_CLOSED;
GordonSin 0:0ed2a7c7190c 130 break;
GordonSin 0:0ed2a7c7190c 131
GordonSin 0:0ed2a7c7190c 132 case LS_STARTING:
GordonSin 0:0ed2a7c7190c 133 if( f->flags & OPT_SILENT ) {
GordonSin 0:0ed2a7c7190c 134 f->state = LS_STOPPED;
GordonSin 0:0ed2a7c7190c 135 } else {
GordonSin 0:0ed2a7c7190c 136 /* Send an initial configure-request */
GordonSin 0:0ed2a7c7190c 137 fsm_sconfreq(f, 0);
GordonSin 0:0ed2a7c7190c 138 f->state = LS_REQSENT;
GordonSin 0:0ed2a7c7190c 139 }
GordonSin 0:0ed2a7c7190c 140 break;
GordonSin 0:0ed2a7c7190c 141
GordonSin 0:0ed2a7c7190c 142 default:
GordonSin 0:0ed2a7c7190c 143 FSMDEBUG(LOG_INFO, ("%s: Up event in state %d (%s)!\n",
GordonSin 0:0ed2a7c7190c 144 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 145 }
GordonSin 0:0ed2a7c7190c 146
GordonSin 0:0ed2a7c7190c 147 FSMDEBUG(LOG_INFO, ("%s: lowerup state %d (%s) -> %d (%s)\n",
GordonSin 0:0ed2a7c7190c 148 PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 149 }
GordonSin 0:0ed2a7c7190c 150
GordonSin 0:0ed2a7c7190c 151
GordonSin 0:0ed2a7c7190c 152 /*
GordonSin 0:0ed2a7c7190c 153 * fsm_lowerdown - The lower layer is down.
GordonSin 0:0ed2a7c7190c 154 *
GordonSin 0:0ed2a7c7190c 155 * Cancel all timeouts and inform upper layers.
GordonSin 0:0ed2a7c7190c 156 */
GordonSin 0:0ed2a7c7190c 157 void
GordonSin 0:0ed2a7c7190c 158 fsm_lowerdown(fsm *f)
GordonSin 0:0ed2a7c7190c 159 {
GordonSin 0:0ed2a7c7190c 160 int oldState = f->state;
GordonSin 0:0ed2a7c7190c 161
GordonSin 0:0ed2a7c7190c 162 LWIP_UNUSED_ARG(oldState);
GordonSin 0:0ed2a7c7190c 163
GordonSin 0:0ed2a7c7190c 164 switch( f->state ) {
GordonSin 0:0ed2a7c7190c 165 case LS_CLOSED:
GordonSin 0:0ed2a7c7190c 166 f->state = LS_INITIAL;
GordonSin 0:0ed2a7c7190c 167 break;
GordonSin 0:0ed2a7c7190c 168
GordonSin 0:0ed2a7c7190c 169 case LS_STOPPED:
GordonSin 0:0ed2a7c7190c 170 f->state = LS_STARTING;
GordonSin 0:0ed2a7c7190c 171 if( f->callbacks->starting ) {
GordonSin 0:0ed2a7c7190c 172 (*f->callbacks->starting)(f);
GordonSin 0:0ed2a7c7190c 173 }
GordonSin 0:0ed2a7c7190c 174 break;
GordonSin 0:0ed2a7c7190c 175
GordonSin 0:0ed2a7c7190c 176 case LS_CLOSING:
GordonSin 0:0ed2a7c7190c 177 f->state = LS_INITIAL;
GordonSin 0:0ed2a7c7190c 178 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
GordonSin 0:0ed2a7c7190c 179 break;
GordonSin 0:0ed2a7c7190c 180
GordonSin 0:0ed2a7c7190c 181 case LS_STOPPING:
GordonSin 0:0ed2a7c7190c 182 case LS_REQSENT:
GordonSin 0:0ed2a7c7190c 183 case LS_ACKRCVD:
GordonSin 0:0ed2a7c7190c 184 case LS_ACKSENT:
GordonSin 0:0ed2a7c7190c 185 f->state = LS_STARTING;
GordonSin 0:0ed2a7c7190c 186 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
GordonSin 0:0ed2a7c7190c 187 break;
GordonSin 0:0ed2a7c7190c 188
GordonSin 0:0ed2a7c7190c 189 case LS_OPENED:
GordonSin 0:0ed2a7c7190c 190 if( f->callbacks->down ) {
GordonSin 0:0ed2a7c7190c 191 (*f->callbacks->down)(f);
GordonSin 0:0ed2a7c7190c 192 }
GordonSin 0:0ed2a7c7190c 193 f->state = LS_STARTING;
GordonSin 0:0ed2a7c7190c 194 break;
GordonSin 0:0ed2a7c7190c 195
GordonSin 0:0ed2a7c7190c 196 default:
GordonSin 0:0ed2a7c7190c 197 FSMDEBUG(LOG_INFO, ("%s: Down event in state %d (%s)!\n",
GordonSin 0:0ed2a7c7190c 198 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 199 }
GordonSin 0:0ed2a7c7190c 200
GordonSin 0:0ed2a7c7190c 201 FSMDEBUG(LOG_INFO, ("%s: lowerdown state %d (%s) -> %d (%s)\n",
GordonSin 0:0ed2a7c7190c 202 PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 203 }
GordonSin 0:0ed2a7c7190c 204
GordonSin 0:0ed2a7c7190c 205
GordonSin 0:0ed2a7c7190c 206 /*
GordonSin 0:0ed2a7c7190c 207 * fsm_open - Link is allowed to come up.
GordonSin 0:0ed2a7c7190c 208 */
GordonSin 0:0ed2a7c7190c 209 void
GordonSin 0:0ed2a7c7190c 210 fsm_open(fsm *f)
GordonSin 0:0ed2a7c7190c 211 {
GordonSin 0:0ed2a7c7190c 212 int oldState = f->state;
GordonSin 0:0ed2a7c7190c 213
GordonSin 0:0ed2a7c7190c 214 LWIP_UNUSED_ARG(oldState);
GordonSin 0:0ed2a7c7190c 215
GordonSin 0:0ed2a7c7190c 216 switch( f->state ) {
GordonSin 0:0ed2a7c7190c 217 case LS_INITIAL:
GordonSin 0:0ed2a7c7190c 218 f->state = LS_STARTING;
GordonSin 0:0ed2a7c7190c 219 if( f->callbacks->starting ) {
GordonSin 0:0ed2a7c7190c 220 (*f->callbacks->starting)(f);
GordonSin 0:0ed2a7c7190c 221 }
GordonSin 0:0ed2a7c7190c 222 break;
GordonSin 0:0ed2a7c7190c 223
GordonSin 0:0ed2a7c7190c 224 case LS_CLOSED:
GordonSin 0:0ed2a7c7190c 225 if( f->flags & OPT_SILENT ) {
GordonSin 0:0ed2a7c7190c 226 f->state = LS_STOPPED;
GordonSin 0:0ed2a7c7190c 227 } else {
GordonSin 0:0ed2a7c7190c 228 /* Send an initial configure-request */
GordonSin 0:0ed2a7c7190c 229 fsm_sconfreq(f, 0);
GordonSin 0:0ed2a7c7190c 230 f->state = LS_REQSENT;
GordonSin 0:0ed2a7c7190c 231 }
GordonSin 0:0ed2a7c7190c 232 break;
GordonSin 0:0ed2a7c7190c 233
GordonSin 0:0ed2a7c7190c 234 case LS_CLOSING:
GordonSin 0:0ed2a7c7190c 235 f->state = LS_STOPPING;
GordonSin 0:0ed2a7c7190c 236 /* fall through */
GordonSin 0:0ed2a7c7190c 237 case LS_STOPPED:
GordonSin 0:0ed2a7c7190c 238 case LS_OPENED:
GordonSin 0:0ed2a7c7190c 239 if( f->flags & OPT_RESTART ) {
GordonSin 0:0ed2a7c7190c 240 fsm_lowerdown(f);
GordonSin 0:0ed2a7c7190c 241 fsm_lowerup(f);
GordonSin 0:0ed2a7c7190c 242 }
GordonSin 0:0ed2a7c7190c 243 break;
GordonSin 0:0ed2a7c7190c 244 }
GordonSin 0:0ed2a7c7190c 245
GordonSin 0:0ed2a7c7190c 246 FSMDEBUG(LOG_INFO, ("%s: open state %d (%s) -> %d (%s)\n",
GordonSin 0:0ed2a7c7190c 247 PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 248 }
GordonSin 0:0ed2a7c7190c 249
GordonSin 0:0ed2a7c7190c 250 #if 0 /* backport pppd 2.4.4b1; */
GordonSin 0:0ed2a7c7190c 251 /*
GordonSin 0:0ed2a7c7190c 252 * terminate_layer - Start process of shutting down the FSM
GordonSin 0:0ed2a7c7190c 253 *
GordonSin 0:0ed2a7c7190c 254 * Cancel any timeout running, notify upper layers we're done, and
GordonSin 0:0ed2a7c7190c 255 * send a terminate-request message as configured.
GordonSin 0:0ed2a7c7190c 256 */
GordonSin 0:0ed2a7c7190c 257 static void
GordonSin 0:0ed2a7c7190c 258 terminate_layer(fsm *f, int nextstate)
GordonSin 0:0ed2a7c7190c 259 {
GordonSin 0:0ed2a7c7190c 260 /* @todo */
GordonSin 0:0ed2a7c7190c 261 }
GordonSin 0:0ed2a7c7190c 262 #endif
GordonSin 0:0ed2a7c7190c 263
GordonSin 0:0ed2a7c7190c 264 /*
GordonSin 0:0ed2a7c7190c 265 * fsm_close - Start closing connection.
GordonSin 0:0ed2a7c7190c 266 *
GordonSin 0:0ed2a7c7190c 267 * Cancel timeouts and either initiate close or possibly go directly to
GordonSin 0:0ed2a7c7190c 268 * the LS_CLOSED state.
GordonSin 0:0ed2a7c7190c 269 */
GordonSin 0:0ed2a7c7190c 270 void
GordonSin 0:0ed2a7c7190c 271 fsm_close(fsm *f, char *reason)
GordonSin 0:0ed2a7c7190c 272 {
GordonSin 0:0ed2a7c7190c 273 int oldState = f->state;
GordonSin 0:0ed2a7c7190c 274
GordonSin 0:0ed2a7c7190c 275 LWIP_UNUSED_ARG(oldState);
GordonSin 0:0ed2a7c7190c 276
GordonSin 0:0ed2a7c7190c 277 f->term_reason = reason;
GordonSin 0:0ed2a7c7190c 278 f->term_reason_len = (reason == NULL ? 0 : (int)strlen(reason));
GordonSin 0:0ed2a7c7190c 279 switch( f->state ) {
GordonSin 0:0ed2a7c7190c 280 case LS_STARTING:
GordonSin 0:0ed2a7c7190c 281 f->state = LS_INITIAL;
GordonSin 0:0ed2a7c7190c 282 break;
GordonSin 0:0ed2a7c7190c 283 case LS_STOPPED:
GordonSin 0:0ed2a7c7190c 284 f->state = LS_CLOSED;
GordonSin 0:0ed2a7c7190c 285 break;
GordonSin 0:0ed2a7c7190c 286 case LS_STOPPING:
GordonSin 0:0ed2a7c7190c 287 f->state = LS_CLOSING;
GordonSin 0:0ed2a7c7190c 288 break;
GordonSin 0:0ed2a7c7190c 289
GordonSin 0:0ed2a7c7190c 290 case LS_REQSENT:
GordonSin 0:0ed2a7c7190c 291 case LS_ACKRCVD:
GordonSin 0:0ed2a7c7190c 292 case LS_ACKSENT:
GordonSin 0:0ed2a7c7190c 293 case LS_OPENED:
GordonSin 0:0ed2a7c7190c 294 if( f->state != LS_OPENED ) {
GordonSin 0:0ed2a7c7190c 295 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
GordonSin 0:0ed2a7c7190c 296 } else if( f->callbacks->down ) {
GordonSin 0:0ed2a7c7190c 297 (*f->callbacks->down)(f); /* Inform upper layers we're down */
GordonSin 0:0ed2a7c7190c 298 }
GordonSin 0:0ed2a7c7190c 299 /* Init restart counter, send Terminate-Request */
GordonSin 0:0ed2a7c7190c 300 f->retransmits = f->maxtermtransmits;
GordonSin 0:0ed2a7c7190c 301 fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
GordonSin 0:0ed2a7c7190c 302 (u_char *) f->term_reason, f->term_reason_len);
GordonSin 0:0ed2a7c7190c 303 TIMEOUT(fsm_timeout, f, f->timeouttime);
GordonSin 0:0ed2a7c7190c 304 --f->retransmits;
GordonSin 0:0ed2a7c7190c 305
GordonSin 0:0ed2a7c7190c 306 f->state = LS_CLOSING;
GordonSin 0:0ed2a7c7190c 307 break;
GordonSin 0:0ed2a7c7190c 308 }
GordonSin 0:0ed2a7c7190c 309
GordonSin 0:0ed2a7c7190c 310 FSMDEBUG(LOG_INFO, ("%s: close reason=%s state %d (%s) -> %d (%s)\n",
GordonSin 0:0ed2a7c7190c 311 PROTO_NAME(f), reason, oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 312 }
GordonSin 0:0ed2a7c7190c 313
GordonSin 0:0ed2a7c7190c 314
GordonSin 0:0ed2a7c7190c 315 /*
GordonSin 0:0ed2a7c7190c 316 * fsm_timeout - Timeout expired.
GordonSin 0:0ed2a7c7190c 317 */
GordonSin 0:0ed2a7c7190c 318 static void
GordonSin 0:0ed2a7c7190c 319 fsm_timeout(void *arg)
GordonSin 0:0ed2a7c7190c 320 {
GordonSin 0:0ed2a7c7190c 321 fsm *f = (fsm *) arg;
GordonSin 0:0ed2a7c7190c 322
GordonSin 0:0ed2a7c7190c 323 switch (f->state) {
GordonSin 0:0ed2a7c7190c 324 case LS_CLOSING:
GordonSin 0:0ed2a7c7190c 325 case LS_STOPPING:
GordonSin 0:0ed2a7c7190c 326 if( f->retransmits <= 0 ) {
GordonSin 0:0ed2a7c7190c 327 FSMDEBUG(LOG_WARNING, ("%s: timeout sending Terminate-Request state=%d (%s)\n",
GordonSin 0:0ed2a7c7190c 328 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 329 /*
GordonSin 0:0ed2a7c7190c 330 * We've waited for an ack long enough. Peer probably heard us.
GordonSin 0:0ed2a7c7190c 331 */
GordonSin 0:0ed2a7c7190c 332 f->state = (f->state == LS_CLOSING)? LS_CLOSED: LS_STOPPED;
GordonSin 0:0ed2a7c7190c 333 if( f->callbacks->finished ) {
GordonSin 0:0ed2a7c7190c 334 (*f->callbacks->finished)(f);
GordonSin 0:0ed2a7c7190c 335 }
GordonSin 0:0ed2a7c7190c 336 } else {
GordonSin 0:0ed2a7c7190c 337 FSMDEBUG(LOG_WARNING, ("%s: timeout resending Terminate-Requests state=%d (%s)\n",
GordonSin 0:0ed2a7c7190c 338 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 339 /* Send Terminate-Request */
GordonSin 0:0ed2a7c7190c 340 fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
GordonSin 0:0ed2a7c7190c 341 (u_char *) f->term_reason, f->term_reason_len);
GordonSin 0:0ed2a7c7190c 342 TIMEOUT(fsm_timeout, f, f->timeouttime);
GordonSin 0:0ed2a7c7190c 343 --f->retransmits;
GordonSin 0:0ed2a7c7190c 344 }
GordonSin 0:0ed2a7c7190c 345 break;
GordonSin 0:0ed2a7c7190c 346
GordonSin 0:0ed2a7c7190c 347 case LS_REQSENT:
GordonSin 0:0ed2a7c7190c 348 case LS_ACKRCVD:
GordonSin 0:0ed2a7c7190c 349 case LS_ACKSENT:
GordonSin 0:0ed2a7c7190c 350 if (f->retransmits <= 0) {
GordonSin 0:0ed2a7c7190c 351 FSMDEBUG(LOG_WARNING, ("%s: timeout sending Config-Requests state=%d (%s)\n",
GordonSin 0:0ed2a7c7190c 352 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 353 f->state = LS_STOPPED;
GordonSin 0:0ed2a7c7190c 354 if( (f->flags & OPT_PASSIVE) == 0 && f->callbacks->finished ) {
GordonSin 0:0ed2a7c7190c 355 (*f->callbacks->finished)(f);
GordonSin 0:0ed2a7c7190c 356 }
GordonSin 0:0ed2a7c7190c 357 } else {
GordonSin 0:0ed2a7c7190c 358 FSMDEBUG(LOG_WARNING, ("%s: timeout resending Config-Request state=%d (%s)\n",
GordonSin 0:0ed2a7c7190c 359 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 360 /* Retransmit the configure-request */
GordonSin 0:0ed2a7c7190c 361 if (f->callbacks->retransmit) {
GordonSin 0:0ed2a7c7190c 362 (*f->callbacks->retransmit)(f);
GordonSin 0:0ed2a7c7190c 363 }
GordonSin 0:0ed2a7c7190c 364 fsm_sconfreq(f, 1); /* Re-send Configure-Request */
GordonSin 0:0ed2a7c7190c 365 if( f->state == LS_ACKRCVD ) {
GordonSin 0:0ed2a7c7190c 366 f->state = LS_REQSENT;
GordonSin 0:0ed2a7c7190c 367 }
GordonSin 0:0ed2a7c7190c 368 }
GordonSin 0:0ed2a7c7190c 369 break;
GordonSin 0:0ed2a7c7190c 370
GordonSin 0:0ed2a7c7190c 371 default:
GordonSin 0:0ed2a7c7190c 372 FSMDEBUG(LOG_INFO, ("%s: UNHANDLED timeout event in state %d (%s)!\n",
GordonSin 0:0ed2a7c7190c 373 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 374 }
GordonSin 0:0ed2a7c7190c 375 }
GordonSin 0:0ed2a7c7190c 376
GordonSin 0:0ed2a7c7190c 377
GordonSin 0:0ed2a7c7190c 378 /*
GordonSin 0:0ed2a7c7190c 379 * fsm_input - Input packet.
GordonSin 0:0ed2a7c7190c 380 */
GordonSin 0:0ed2a7c7190c 381 void
GordonSin 0:0ed2a7c7190c 382 fsm_input(fsm *f, u_char *inpacket, int l)
GordonSin 0:0ed2a7c7190c 383 {
GordonSin 0:0ed2a7c7190c 384 u_char *inp = inpacket;
GordonSin 0:0ed2a7c7190c 385 u_char code, id;
GordonSin 0:0ed2a7c7190c 386 int len;
GordonSin 0:0ed2a7c7190c 387
GordonSin 0:0ed2a7c7190c 388 /*
GordonSin 0:0ed2a7c7190c 389 * Parse header (code, id and length).
GordonSin 0:0ed2a7c7190c 390 * If packet too short, drop it.
GordonSin 0:0ed2a7c7190c 391 */
GordonSin 0:0ed2a7c7190c 392 if (l < HEADERLEN) {
GordonSin 0:0ed2a7c7190c 393 FSMDEBUG(LOG_WARNING, ("fsm_input(%x): Rcvd short header.\n",
GordonSin 0:0ed2a7c7190c 394 f->protocol));
GordonSin 0:0ed2a7c7190c 395 return;
GordonSin 0:0ed2a7c7190c 396 }
GordonSin 0:0ed2a7c7190c 397 GETCHAR(code, inp);
GordonSin 0:0ed2a7c7190c 398 GETCHAR(id, inp);
GordonSin 0:0ed2a7c7190c 399 GETSHORT(len, inp);
GordonSin 0:0ed2a7c7190c 400 if (len < HEADERLEN) {
GordonSin 0:0ed2a7c7190c 401 FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd illegal length.\n",
GordonSin 0:0ed2a7c7190c 402 f->protocol));
GordonSin 0:0ed2a7c7190c 403 return;
GordonSin 0:0ed2a7c7190c 404 }
GordonSin 0:0ed2a7c7190c 405 if (len > l) {
GordonSin 0:0ed2a7c7190c 406 FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd short packet.\n",
GordonSin 0:0ed2a7c7190c 407 f->protocol));
GordonSin 0:0ed2a7c7190c 408 return;
GordonSin 0:0ed2a7c7190c 409 }
GordonSin 0:0ed2a7c7190c 410 len -= HEADERLEN; /* subtract header length */
GordonSin 0:0ed2a7c7190c 411
GordonSin 0:0ed2a7c7190c 412 if( f->state == LS_INITIAL || f->state == LS_STARTING ) {
GordonSin 0:0ed2a7c7190c 413 FSMDEBUG(LOG_INFO, ("fsm_input(%x): Rcvd packet in state %d (%s).\n",
GordonSin 0:0ed2a7c7190c 414 f->protocol, f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 415 return;
GordonSin 0:0ed2a7c7190c 416 }
GordonSin 0:0ed2a7c7190c 417 FSMDEBUG(LOG_INFO, ("fsm_input(%s):%d,%d,%d\n", PROTO_NAME(f), code, id, l));
GordonSin 0:0ed2a7c7190c 418 /*
GordonSin 0:0ed2a7c7190c 419 * Action depends on code.
GordonSin 0:0ed2a7c7190c 420 */
GordonSin 0:0ed2a7c7190c 421 switch (code) {
GordonSin 0:0ed2a7c7190c 422 case CONFREQ:
GordonSin 0:0ed2a7c7190c 423 fsm_rconfreq(f, id, inp, len);
GordonSin 0:0ed2a7c7190c 424 break;
GordonSin 0:0ed2a7c7190c 425
GordonSin 0:0ed2a7c7190c 426 case CONFACK:
GordonSin 0:0ed2a7c7190c 427 fsm_rconfack(f, id, inp, len);
GordonSin 0:0ed2a7c7190c 428 break;
GordonSin 0:0ed2a7c7190c 429
GordonSin 0:0ed2a7c7190c 430 case CONFNAK:
GordonSin 0:0ed2a7c7190c 431 case CONFREJ:
GordonSin 0:0ed2a7c7190c 432 fsm_rconfnakrej(f, code, id, inp, len);
GordonSin 0:0ed2a7c7190c 433 break;
GordonSin 0:0ed2a7c7190c 434
GordonSin 0:0ed2a7c7190c 435 case TERMREQ:
GordonSin 0:0ed2a7c7190c 436 fsm_rtermreq(f, id, inp, len);
GordonSin 0:0ed2a7c7190c 437 break;
GordonSin 0:0ed2a7c7190c 438
GordonSin 0:0ed2a7c7190c 439 case TERMACK:
GordonSin 0:0ed2a7c7190c 440 fsm_rtermack(f);
GordonSin 0:0ed2a7c7190c 441 break;
GordonSin 0:0ed2a7c7190c 442
GordonSin 0:0ed2a7c7190c 443 case CODEREJ:
GordonSin 0:0ed2a7c7190c 444 fsm_rcoderej(f, inp, len);
GordonSin 0:0ed2a7c7190c 445 break;
GordonSin 0:0ed2a7c7190c 446
GordonSin 0:0ed2a7c7190c 447 default:
GordonSin 0:0ed2a7c7190c 448 FSMDEBUG(LOG_INFO, ("fsm_input(%s): default: \n", PROTO_NAME(f)));
GordonSin 0:0ed2a7c7190c 449 if( !f->callbacks->extcode ||
GordonSin 0:0ed2a7c7190c 450 !(*f->callbacks->extcode)(f, code, id, inp, len) ) {
GordonSin 0:0ed2a7c7190c 451 fsm_sdata(f, CODEREJ, ++f->id, inpacket, len + HEADERLEN);
GordonSin 0:0ed2a7c7190c 452 }
GordonSin 0:0ed2a7c7190c 453 break;
GordonSin 0:0ed2a7c7190c 454 }
GordonSin 0:0ed2a7c7190c 455 }
GordonSin 0:0ed2a7c7190c 456
GordonSin 0:0ed2a7c7190c 457
GordonSin 0:0ed2a7c7190c 458 /*
GordonSin 0:0ed2a7c7190c 459 * fsm_rconfreq - Receive Configure-Request.
GordonSin 0:0ed2a7c7190c 460 */
GordonSin 0:0ed2a7c7190c 461 static void
GordonSin 0:0ed2a7c7190c 462 fsm_rconfreq(fsm *f, u_char id, u_char *inp, int len)
GordonSin 0:0ed2a7c7190c 463 {
GordonSin 0:0ed2a7c7190c 464 int code, reject_if_disagree;
GordonSin 0:0ed2a7c7190c 465
GordonSin 0:0ed2a7c7190c 466 FSMDEBUG(LOG_INFO, ("fsm_rconfreq(%s): Rcvd id %d state=%d (%s)\n",
GordonSin 0:0ed2a7c7190c 467 PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 468 switch( f->state ) {
GordonSin 0:0ed2a7c7190c 469 case LS_CLOSED:
GordonSin 0:0ed2a7c7190c 470 /* Go away, we're closed */
GordonSin 0:0ed2a7c7190c 471 fsm_sdata(f, TERMACK, id, NULL, 0);
GordonSin 0:0ed2a7c7190c 472 return;
GordonSin 0:0ed2a7c7190c 473 case LS_CLOSING:
GordonSin 0:0ed2a7c7190c 474 case LS_STOPPING:
GordonSin 0:0ed2a7c7190c 475 return;
GordonSin 0:0ed2a7c7190c 476
GordonSin 0:0ed2a7c7190c 477 case LS_OPENED:
GordonSin 0:0ed2a7c7190c 478 /* Go down and restart negotiation */
GordonSin 0:0ed2a7c7190c 479 if( f->callbacks->down ) {
GordonSin 0:0ed2a7c7190c 480 (*f->callbacks->down)(f); /* Inform upper layers */
GordonSin 0:0ed2a7c7190c 481 }
GordonSin 0:0ed2a7c7190c 482 fsm_sconfreq(f, 0); /* Send initial Configure-Request */
GordonSin 0:0ed2a7c7190c 483 break;
GordonSin 0:0ed2a7c7190c 484
GordonSin 0:0ed2a7c7190c 485 case LS_STOPPED:
GordonSin 0:0ed2a7c7190c 486 /* Negotiation started by our peer */
GordonSin 0:0ed2a7c7190c 487 fsm_sconfreq(f, 0); /* Send initial Configure-Request */
GordonSin 0:0ed2a7c7190c 488 f->state = LS_REQSENT;
GordonSin 0:0ed2a7c7190c 489 break;
GordonSin 0:0ed2a7c7190c 490 }
GordonSin 0:0ed2a7c7190c 491
GordonSin 0:0ed2a7c7190c 492 /*
GordonSin 0:0ed2a7c7190c 493 * Pass the requested configuration options
GordonSin 0:0ed2a7c7190c 494 * to protocol-specific code for checking.
GordonSin 0:0ed2a7c7190c 495 */
GordonSin 0:0ed2a7c7190c 496 if (f->callbacks->reqci) { /* Check CI */
GordonSin 0:0ed2a7c7190c 497 reject_if_disagree = (f->nakloops >= f->maxnakloops);
GordonSin 0:0ed2a7c7190c 498 code = (*f->callbacks->reqci)(f, inp, &len, reject_if_disagree);
GordonSin 0:0ed2a7c7190c 499 } else if (len) {
GordonSin 0:0ed2a7c7190c 500 code = CONFREJ; /* Reject all CI */
GordonSin 0:0ed2a7c7190c 501 } else {
GordonSin 0:0ed2a7c7190c 502 code = CONFACK;
GordonSin 0:0ed2a7c7190c 503 }
GordonSin 0:0ed2a7c7190c 504
GordonSin 0:0ed2a7c7190c 505 /* send the Ack, Nak or Rej to the peer */
GordonSin 0:0ed2a7c7190c 506 fsm_sdata(f, (u_char)code, id, inp, len);
GordonSin 0:0ed2a7c7190c 507
GordonSin 0:0ed2a7c7190c 508 if (code == CONFACK) {
GordonSin 0:0ed2a7c7190c 509 if (f->state == LS_ACKRCVD) {
GordonSin 0:0ed2a7c7190c 510 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
GordonSin 0:0ed2a7c7190c 511 f->state = LS_OPENED;
GordonSin 0:0ed2a7c7190c 512 if (f->callbacks->up) {
GordonSin 0:0ed2a7c7190c 513 (*f->callbacks->up)(f); /* Inform upper layers */
GordonSin 0:0ed2a7c7190c 514 }
GordonSin 0:0ed2a7c7190c 515 } else {
GordonSin 0:0ed2a7c7190c 516 f->state = LS_ACKSENT;
GordonSin 0:0ed2a7c7190c 517 }
GordonSin 0:0ed2a7c7190c 518 f->nakloops = 0;
GordonSin 0:0ed2a7c7190c 519 } else {
GordonSin 0:0ed2a7c7190c 520 /* we sent CONFACK or CONFREJ */
GordonSin 0:0ed2a7c7190c 521 if (f->state != LS_ACKRCVD) {
GordonSin 0:0ed2a7c7190c 522 f->state = LS_REQSENT;
GordonSin 0:0ed2a7c7190c 523 }
GordonSin 0:0ed2a7c7190c 524 if( code == CONFNAK ) {
GordonSin 0:0ed2a7c7190c 525 ++f->nakloops;
GordonSin 0:0ed2a7c7190c 526 }
GordonSin 0:0ed2a7c7190c 527 }
GordonSin 0:0ed2a7c7190c 528 }
GordonSin 0:0ed2a7c7190c 529
GordonSin 0:0ed2a7c7190c 530
GordonSin 0:0ed2a7c7190c 531 /*
GordonSin 0:0ed2a7c7190c 532 * fsm_rconfack - Receive Configure-Ack.
GordonSin 0:0ed2a7c7190c 533 */
GordonSin 0:0ed2a7c7190c 534 static void
GordonSin 0:0ed2a7c7190c 535 fsm_rconfack(fsm *f, int id, u_char *inp, int len)
GordonSin 0:0ed2a7c7190c 536 {
GordonSin 0:0ed2a7c7190c 537 FSMDEBUG(LOG_INFO, ("fsm_rconfack(%s): Rcvd id %d state=%d (%s)\n",
GordonSin 0:0ed2a7c7190c 538 PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 539
GordonSin 0:0ed2a7c7190c 540 if (id != f->reqid || f->seen_ack) { /* Expected id? */
GordonSin 0:0ed2a7c7190c 541 return; /* Nope, toss... */
GordonSin 0:0ed2a7c7190c 542 }
GordonSin 0:0ed2a7c7190c 543 if( !(f->callbacks->ackci? (*f->callbacks->ackci)(f, inp, len): (len == 0)) ) {
GordonSin 0:0ed2a7c7190c 544 /* Ack is bad - ignore it */
GordonSin 0:0ed2a7c7190c 545 FSMDEBUG(LOG_INFO, ("%s: received bad Ack (length %d)\n",
GordonSin 0:0ed2a7c7190c 546 PROTO_NAME(f), len));
GordonSin 0:0ed2a7c7190c 547 return;
GordonSin 0:0ed2a7c7190c 548 }
GordonSin 0:0ed2a7c7190c 549 f->seen_ack = 1;
GordonSin 0:0ed2a7c7190c 550
GordonSin 0:0ed2a7c7190c 551 switch (f->state) {
GordonSin 0:0ed2a7c7190c 552 case LS_CLOSED:
GordonSin 0:0ed2a7c7190c 553 case LS_STOPPED:
GordonSin 0:0ed2a7c7190c 554 fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
GordonSin 0:0ed2a7c7190c 555 break;
GordonSin 0:0ed2a7c7190c 556
GordonSin 0:0ed2a7c7190c 557 case LS_REQSENT:
GordonSin 0:0ed2a7c7190c 558 f->state = LS_ACKRCVD;
GordonSin 0:0ed2a7c7190c 559 f->retransmits = f->maxconfreqtransmits;
GordonSin 0:0ed2a7c7190c 560 break;
GordonSin 0:0ed2a7c7190c 561
GordonSin 0:0ed2a7c7190c 562 case LS_ACKRCVD:
GordonSin 0:0ed2a7c7190c 563 /* Huh? an extra valid Ack? oh well... */
GordonSin 0:0ed2a7c7190c 564 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
GordonSin 0:0ed2a7c7190c 565 fsm_sconfreq(f, 0);
GordonSin 0:0ed2a7c7190c 566 f->state = LS_REQSENT;
GordonSin 0:0ed2a7c7190c 567 break;
GordonSin 0:0ed2a7c7190c 568
GordonSin 0:0ed2a7c7190c 569 case LS_ACKSENT:
GordonSin 0:0ed2a7c7190c 570 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
GordonSin 0:0ed2a7c7190c 571 f->state = LS_OPENED;
GordonSin 0:0ed2a7c7190c 572 f->retransmits = f->maxconfreqtransmits;
GordonSin 0:0ed2a7c7190c 573 if (f->callbacks->up) {
GordonSin 0:0ed2a7c7190c 574 (*f->callbacks->up)(f); /* Inform upper layers */
GordonSin 0:0ed2a7c7190c 575 }
GordonSin 0:0ed2a7c7190c 576 break;
GordonSin 0:0ed2a7c7190c 577
GordonSin 0:0ed2a7c7190c 578 case LS_OPENED:
GordonSin 0:0ed2a7c7190c 579 /* Go down and restart negotiation */
GordonSin 0:0ed2a7c7190c 580 if (f->callbacks->down) {
GordonSin 0:0ed2a7c7190c 581 (*f->callbacks->down)(f); /* Inform upper layers */
GordonSin 0:0ed2a7c7190c 582 }
GordonSin 0:0ed2a7c7190c 583 fsm_sconfreq(f, 0); /* Send initial Configure-Request */
GordonSin 0:0ed2a7c7190c 584 f->state = LS_REQSENT;
GordonSin 0:0ed2a7c7190c 585 break;
GordonSin 0:0ed2a7c7190c 586 }
GordonSin 0:0ed2a7c7190c 587 }
GordonSin 0:0ed2a7c7190c 588
GordonSin 0:0ed2a7c7190c 589
GordonSin 0:0ed2a7c7190c 590 /*
GordonSin 0:0ed2a7c7190c 591 * fsm_rconfnakrej - Receive Configure-Nak or Configure-Reject.
GordonSin 0:0ed2a7c7190c 592 */
GordonSin 0:0ed2a7c7190c 593 static void
GordonSin 0:0ed2a7c7190c 594 fsm_rconfnakrej(fsm *f, int code, int id, u_char *inp, int len)
GordonSin 0:0ed2a7c7190c 595 {
GordonSin 0:0ed2a7c7190c 596 int (*proc) (fsm *, u_char *, int);
GordonSin 0:0ed2a7c7190c 597 int ret;
GordonSin 0:0ed2a7c7190c 598
GordonSin 0:0ed2a7c7190c 599 FSMDEBUG(LOG_INFO, ("fsm_rconfnakrej(%s): Rcvd id %d state=%d (%s)\n",
GordonSin 0:0ed2a7c7190c 600 PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 601
GordonSin 0:0ed2a7c7190c 602 if (id != f->reqid || f->seen_ack) { /* Expected id? */
GordonSin 0:0ed2a7c7190c 603 return; /* Nope, toss... */
GordonSin 0:0ed2a7c7190c 604 }
GordonSin 0:0ed2a7c7190c 605 proc = (code == CONFNAK)? f->callbacks->nakci: f->callbacks->rejci;
GordonSin 0:0ed2a7c7190c 606 if (!proc || !((ret = proc(f, inp, len)))) {
GordonSin 0:0ed2a7c7190c 607 /* Nak/reject is bad - ignore it */
GordonSin 0:0ed2a7c7190c 608 FSMDEBUG(LOG_INFO, ("%s: received bad %s (length %d)\n",
GordonSin 0:0ed2a7c7190c 609 PROTO_NAME(f), (code==CONFNAK? "Nak": "reject"), len));
GordonSin 0:0ed2a7c7190c 610 return;
GordonSin 0:0ed2a7c7190c 611 }
GordonSin 0:0ed2a7c7190c 612 f->seen_ack = 1;
GordonSin 0:0ed2a7c7190c 613
GordonSin 0:0ed2a7c7190c 614 switch (f->state) {
GordonSin 0:0ed2a7c7190c 615 case LS_CLOSED:
GordonSin 0:0ed2a7c7190c 616 case LS_STOPPED:
GordonSin 0:0ed2a7c7190c 617 fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
GordonSin 0:0ed2a7c7190c 618 break;
GordonSin 0:0ed2a7c7190c 619
GordonSin 0:0ed2a7c7190c 620 case LS_REQSENT:
GordonSin 0:0ed2a7c7190c 621 case LS_ACKSENT:
GordonSin 0:0ed2a7c7190c 622 /* They didn't agree to what we wanted - try another request */
GordonSin 0:0ed2a7c7190c 623 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
GordonSin 0:0ed2a7c7190c 624 if (ret < 0) {
GordonSin 0:0ed2a7c7190c 625 f->state = LS_STOPPED; /* kludge for stopping CCP */
GordonSin 0:0ed2a7c7190c 626 } else {
GordonSin 0:0ed2a7c7190c 627 fsm_sconfreq(f, 0); /* Send Configure-Request */
GordonSin 0:0ed2a7c7190c 628 }
GordonSin 0:0ed2a7c7190c 629 break;
GordonSin 0:0ed2a7c7190c 630
GordonSin 0:0ed2a7c7190c 631 case LS_ACKRCVD:
GordonSin 0:0ed2a7c7190c 632 /* Got a Nak/reject when we had already had an Ack?? oh well... */
GordonSin 0:0ed2a7c7190c 633 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
GordonSin 0:0ed2a7c7190c 634 fsm_sconfreq(f, 0);
GordonSin 0:0ed2a7c7190c 635 f->state = LS_REQSENT;
GordonSin 0:0ed2a7c7190c 636 break;
GordonSin 0:0ed2a7c7190c 637
GordonSin 0:0ed2a7c7190c 638 case LS_OPENED:
GordonSin 0:0ed2a7c7190c 639 /* Go down and restart negotiation */
GordonSin 0:0ed2a7c7190c 640 if (f->callbacks->down) {
GordonSin 0:0ed2a7c7190c 641 (*f->callbacks->down)(f); /* Inform upper layers */
GordonSin 0:0ed2a7c7190c 642 }
GordonSin 0:0ed2a7c7190c 643 fsm_sconfreq(f, 0); /* Send initial Configure-Request */
GordonSin 0:0ed2a7c7190c 644 f->state = LS_REQSENT;
GordonSin 0:0ed2a7c7190c 645 break;
GordonSin 0:0ed2a7c7190c 646 }
GordonSin 0:0ed2a7c7190c 647 }
GordonSin 0:0ed2a7c7190c 648
GordonSin 0:0ed2a7c7190c 649
GordonSin 0:0ed2a7c7190c 650 /*
GordonSin 0:0ed2a7c7190c 651 * fsm_rtermreq - Receive Terminate-Req.
GordonSin 0:0ed2a7c7190c 652 */
GordonSin 0:0ed2a7c7190c 653 static void
GordonSin 0:0ed2a7c7190c 654 fsm_rtermreq(fsm *f, int id, u_char *p, int len)
GordonSin 0:0ed2a7c7190c 655 {
GordonSin 0:0ed2a7c7190c 656 LWIP_UNUSED_ARG(p);
GordonSin 0:0ed2a7c7190c 657
GordonSin 0:0ed2a7c7190c 658 FSMDEBUG(LOG_INFO, ("fsm_rtermreq(%s): Rcvd id %d state=%d (%s)\n",
GordonSin 0:0ed2a7c7190c 659 PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 660
GordonSin 0:0ed2a7c7190c 661 switch (f->state) {
GordonSin 0:0ed2a7c7190c 662 case LS_ACKRCVD:
GordonSin 0:0ed2a7c7190c 663 case LS_ACKSENT:
GordonSin 0:0ed2a7c7190c 664 f->state = LS_REQSENT; /* Start over but keep trying */
GordonSin 0:0ed2a7c7190c 665 break;
GordonSin 0:0ed2a7c7190c 666
GordonSin 0:0ed2a7c7190c 667 case LS_OPENED:
GordonSin 0:0ed2a7c7190c 668 if (len > 0) {
GordonSin 0:0ed2a7c7190c 669 FSMDEBUG(LOG_INFO, ("%s terminated by peer (%p)\n", PROTO_NAME(f), p));
GordonSin 0:0ed2a7c7190c 670 } else {
GordonSin 0:0ed2a7c7190c 671 FSMDEBUG(LOG_INFO, ("%s terminated by peer\n", PROTO_NAME(f)));
GordonSin 0:0ed2a7c7190c 672 }
GordonSin 0:0ed2a7c7190c 673 if (f->callbacks->down) {
GordonSin 0:0ed2a7c7190c 674 (*f->callbacks->down)(f); /* Inform upper layers */
GordonSin 0:0ed2a7c7190c 675 }
GordonSin 0:0ed2a7c7190c 676 f->retransmits = 0;
GordonSin 0:0ed2a7c7190c 677 f->state = LS_STOPPING;
GordonSin 0:0ed2a7c7190c 678 TIMEOUT(fsm_timeout, f, f->timeouttime);
GordonSin 0:0ed2a7c7190c 679 break;
GordonSin 0:0ed2a7c7190c 680 }
GordonSin 0:0ed2a7c7190c 681
GordonSin 0:0ed2a7c7190c 682 fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
GordonSin 0:0ed2a7c7190c 683 }
GordonSin 0:0ed2a7c7190c 684
GordonSin 0:0ed2a7c7190c 685
GordonSin 0:0ed2a7c7190c 686 /*
GordonSin 0:0ed2a7c7190c 687 * fsm_rtermack - Receive Terminate-Ack.
GordonSin 0:0ed2a7c7190c 688 */
GordonSin 0:0ed2a7c7190c 689 static void
GordonSin 0:0ed2a7c7190c 690 fsm_rtermack(fsm *f)
GordonSin 0:0ed2a7c7190c 691 {
GordonSin 0:0ed2a7c7190c 692 FSMDEBUG(LOG_INFO, ("fsm_rtermack(%s): state=%d (%s)\n",
GordonSin 0:0ed2a7c7190c 693 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 694
GordonSin 0:0ed2a7c7190c 695 switch (f->state) {
GordonSin 0:0ed2a7c7190c 696 case LS_CLOSING:
GordonSin 0:0ed2a7c7190c 697 UNTIMEOUT(fsm_timeout, f);
GordonSin 0:0ed2a7c7190c 698 f->state = LS_CLOSED;
GordonSin 0:0ed2a7c7190c 699 if( f->callbacks->finished ) {
GordonSin 0:0ed2a7c7190c 700 (*f->callbacks->finished)(f);
GordonSin 0:0ed2a7c7190c 701 }
GordonSin 0:0ed2a7c7190c 702 break;
GordonSin 0:0ed2a7c7190c 703
GordonSin 0:0ed2a7c7190c 704 case LS_STOPPING:
GordonSin 0:0ed2a7c7190c 705 UNTIMEOUT(fsm_timeout, f);
GordonSin 0:0ed2a7c7190c 706 f->state = LS_STOPPED;
GordonSin 0:0ed2a7c7190c 707 if( f->callbacks->finished ) {
GordonSin 0:0ed2a7c7190c 708 (*f->callbacks->finished)(f);
GordonSin 0:0ed2a7c7190c 709 }
GordonSin 0:0ed2a7c7190c 710 break;
GordonSin 0:0ed2a7c7190c 711
GordonSin 0:0ed2a7c7190c 712 case LS_ACKRCVD:
GordonSin 0:0ed2a7c7190c 713 f->state = LS_REQSENT;
GordonSin 0:0ed2a7c7190c 714 break;
GordonSin 0:0ed2a7c7190c 715
GordonSin 0:0ed2a7c7190c 716 case LS_OPENED:
GordonSin 0:0ed2a7c7190c 717 if (f->callbacks->down) {
GordonSin 0:0ed2a7c7190c 718 (*f->callbacks->down)(f); /* Inform upper layers */
GordonSin 0:0ed2a7c7190c 719 }
GordonSin 0:0ed2a7c7190c 720 fsm_sconfreq(f, 0);
GordonSin 0:0ed2a7c7190c 721 break;
GordonSin 0:0ed2a7c7190c 722 default:
GordonSin 0:0ed2a7c7190c 723 FSMDEBUG(LOG_INFO, ("fsm_rtermack(%s): UNHANDLED state=%d (%s)!!!\n",
GordonSin 0:0ed2a7c7190c 724 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 725 }
GordonSin 0:0ed2a7c7190c 726 }
GordonSin 0:0ed2a7c7190c 727
GordonSin 0:0ed2a7c7190c 728
GordonSin 0:0ed2a7c7190c 729 /*
GordonSin 0:0ed2a7c7190c 730 * fsm_rcoderej - Receive an Code-Reject.
GordonSin 0:0ed2a7c7190c 731 */
GordonSin 0:0ed2a7c7190c 732 static void
GordonSin 0:0ed2a7c7190c 733 fsm_rcoderej(fsm *f, u_char *inp, int len)
GordonSin 0:0ed2a7c7190c 734 {
GordonSin 0:0ed2a7c7190c 735 u_char code, id;
GordonSin 0:0ed2a7c7190c 736
GordonSin 0:0ed2a7c7190c 737 FSMDEBUG(LOG_INFO, ("fsm_rcoderej(%s): state=%d (%s)\n",
GordonSin 0:0ed2a7c7190c 738 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 739
GordonSin 0:0ed2a7c7190c 740 if (len < HEADERLEN) {
GordonSin 0:0ed2a7c7190c 741 FSMDEBUG(LOG_INFO, ("fsm_rcoderej: Rcvd short Code-Reject packet!\n"));
GordonSin 0:0ed2a7c7190c 742 return;
GordonSin 0:0ed2a7c7190c 743 }
GordonSin 0:0ed2a7c7190c 744 GETCHAR(code, inp);
GordonSin 0:0ed2a7c7190c 745 GETCHAR(id, inp);
GordonSin 0:0ed2a7c7190c 746 FSMDEBUG(LOG_WARNING, ("%s: Rcvd Code-Reject for code %d, id %d\n",
GordonSin 0:0ed2a7c7190c 747 PROTO_NAME(f), code, id));
GordonSin 0:0ed2a7c7190c 748
GordonSin 0:0ed2a7c7190c 749 if( f->state == LS_ACKRCVD ) {
GordonSin 0:0ed2a7c7190c 750 f->state = LS_REQSENT;
GordonSin 0:0ed2a7c7190c 751 }
GordonSin 0:0ed2a7c7190c 752 }
GordonSin 0:0ed2a7c7190c 753
GordonSin 0:0ed2a7c7190c 754
GordonSin 0:0ed2a7c7190c 755 /*
GordonSin 0:0ed2a7c7190c 756 * fsm_protreject - Peer doesn't speak this protocol.
GordonSin 0:0ed2a7c7190c 757 *
GordonSin 0:0ed2a7c7190c 758 * Treat this as a catastrophic error (RXJ-).
GordonSin 0:0ed2a7c7190c 759 */
GordonSin 0:0ed2a7c7190c 760 void
GordonSin 0:0ed2a7c7190c 761 fsm_protreject(fsm *f)
GordonSin 0:0ed2a7c7190c 762 {
GordonSin 0:0ed2a7c7190c 763 switch( f->state ) {
GordonSin 0:0ed2a7c7190c 764 case LS_CLOSING:
GordonSin 0:0ed2a7c7190c 765 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
GordonSin 0:0ed2a7c7190c 766 /* fall through */
GordonSin 0:0ed2a7c7190c 767 case LS_CLOSED:
GordonSin 0:0ed2a7c7190c 768 f->state = LS_CLOSED;
GordonSin 0:0ed2a7c7190c 769 if( f->callbacks->finished ) {
GordonSin 0:0ed2a7c7190c 770 (*f->callbacks->finished)(f);
GordonSin 0:0ed2a7c7190c 771 }
GordonSin 0:0ed2a7c7190c 772 break;
GordonSin 0:0ed2a7c7190c 773
GordonSin 0:0ed2a7c7190c 774 case LS_STOPPING:
GordonSin 0:0ed2a7c7190c 775 case LS_REQSENT:
GordonSin 0:0ed2a7c7190c 776 case LS_ACKRCVD:
GordonSin 0:0ed2a7c7190c 777 case LS_ACKSENT:
GordonSin 0:0ed2a7c7190c 778 UNTIMEOUT(fsm_timeout, f); /* Cancel timeout */
GordonSin 0:0ed2a7c7190c 779 /* fall through */
GordonSin 0:0ed2a7c7190c 780 case LS_STOPPED:
GordonSin 0:0ed2a7c7190c 781 f->state = LS_STOPPED;
GordonSin 0:0ed2a7c7190c 782 if( f->callbacks->finished ) {
GordonSin 0:0ed2a7c7190c 783 (*f->callbacks->finished)(f);
GordonSin 0:0ed2a7c7190c 784 }
GordonSin 0:0ed2a7c7190c 785 break;
GordonSin 0:0ed2a7c7190c 786
GordonSin 0:0ed2a7c7190c 787 case LS_OPENED:
GordonSin 0:0ed2a7c7190c 788 if( f->callbacks->down ) {
GordonSin 0:0ed2a7c7190c 789 (*f->callbacks->down)(f);
GordonSin 0:0ed2a7c7190c 790 }
GordonSin 0:0ed2a7c7190c 791 /* Init restart counter, send Terminate-Request */
GordonSin 0:0ed2a7c7190c 792 f->retransmits = f->maxtermtransmits;
GordonSin 0:0ed2a7c7190c 793 fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
GordonSin 0:0ed2a7c7190c 794 (u_char *) f->term_reason, f->term_reason_len);
GordonSin 0:0ed2a7c7190c 795 TIMEOUT(fsm_timeout, f, f->timeouttime);
GordonSin 0:0ed2a7c7190c 796 --f->retransmits;
GordonSin 0:0ed2a7c7190c 797
GordonSin 0:0ed2a7c7190c 798 f->state = LS_STOPPING;
GordonSin 0:0ed2a7c7190c 799 break;
GordonSin 0:0ed2a7c7190c 800
GordonSin 0:0ed2a7c7190c 801 default:
GordonSin 0:0ed2a7c7190c 802 FSMDEBUG(LOG_INFO, ("%s: Protocol-reject event in state %d (%s)!\n",
GordonSin 0:0ed2a7c7190c 803 PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
GordonSin 0:0ed2a7c7190c 804 }
GordonSin 0:0ed2a7c7190c 805 }
GordonSin 0:0ed2a7c7190c 806
GordonSin 0:0ed2a7c7190c 807
GordonSin 0:0ed2a7c7190c 808 /*
GordonSin 0:0ed2a7c7190c 809 * fsm_sconfreq - Send a Configure-Request.
GordonSin 0:0ed2a7c7190c 810 */
GordonSin 0:0ed2a7c7190c 811 static void
GordonSin 0:0ed2a7c7190c 812 fsm_sconfreq(fsm *f, int retransmit)
GordonSin 0:0ed2a7c7190c 813 {
GordonSin 0:0ed2a7c7190c 814 u_char *outp;
GordonSin 0:0ed2a7c7190c 815 int cilen;
GordonSin 0:0ed2a7c7190c 816
GordonSin 0:0ed2a7c7190c 817 if( f->state != LS_REQSENT && f->state != LS_ACKRCVD && f->state != LS_ACKSENT ) {
GordonSin 0:0ed2a7c7190c 818 /* Not currently negotiating - reset options */
GordonSin 0:0ed2a7c7190c 819 if( f->callbacks->resetci ) {
GordonSin 0:0ed2a7c7190c 820 (*f->callbacks->resetci)(f);
GordonSin 0:0ed2a7c7190c 821 }
GordonSin 0:0ed2a7c7190c 822 f->nakloops = 0;
GordonSin 0:0ed2a7c7190c 823 }
GordonSin 0:0ed2a7c7190c 824
GordonSin 0:0ed2a7c7190c 825 if( !retransmit ) {
GordonSin 0:0ed2a7c7190c 826 /* New request - reset retransmission counter, use new ID */
GordonSin 0:0ed2a7c7190c 827 f->retransmits = f->maxconfreqtransmits;
GordonSin 0:0ed2a7c7190c 828 f->reqid = ++f->id;
GordonSin 0:0ed2a7c7190c 829 }
GordonSin 0:0ed2a7c7190c 830
GordonSin 0:0ed2a7c7190c 831 f->seen_ack = 0;
GordonSin 0:0ed2a7c7190c 832
GordonSin 0:0ed2a7c7190c 833 /*
GordonSin 0:0ed2a7c7190c 834 * Make up the request packet
GordonSin 0:0ed2a7c7190c 835 */
GordonSin 0:0ed2a7c7190c 836 outp = outpacket_buf[f->unit] + PPP_HDRLEN + HEADERLEN;
GordonSin 0:0ed2a7c7190c 837 if( f->callbacks->cilen && f->callbacks->addci ) {
GordonSin 0:0ed2a7c7190c 838 cilen = (*f->callbacks->cilen)(f);
GordonSin 0:0ed2a7c7190c 839 if( cilen > peer_mru[f->unit] - (int)HEADERLEN ) {
GordonSin 0:0ed2a7c7190c 840 cilen = peer_mru[f->unit] - HEADERLEN;
GordonSin 0:0ed2a7c7190c 841 }
GordonSin 0:0ed2a7c7190c 842 if (f->callbacks->addci) {
GordonSin 0:0ed2a7c7190c 843 (*f->callbacks->addci)(f, outp, &cilen);
GordonSin 0:0ed2a7c7190c 844 }
GordonSin 0:0ed2a7c7190c 845 } else {
GordonSin 0:0ed2a7c7190c 846 cilen = 0;
GordonSin 0:0ed2a7c7190c 847 }
GordonSin 0:0ed2a7c7190c 848
GordonSin 0:0ed2a7c7190c 849 /* send the request to our peer */
GordonSin 0:0ed2a7c7190c 850 fsm_sdata(f, CONFREQ, f->reqid, outp, cilen);
GordonSin 0:0ed2a7c7190c 851
GordonSin 0:0ed2a7c7190c 852 /* start the retransmit timer */
GordonSin 0:0ed2a7c7190c 853 --f->retransmits;
GordonSin 0:0ed2a7c7190c 854 TIMEOUT(fsm_timeout, f, f->timeouttime);
GordonSin 0:0ed2a7c7190c 855
GordonSin 0:0ed2a7c7190c 856 FSMDEBUG(LOG_INFO, ("%s: sending Configure-Request, id %d\n",
GordonSin 0:0ed2a7c7190c 857 PROTO_NAME(f), f->reqid));
GordonSin 0:0ed2a7c7190c 858 }
GordonSin 0:0ed2a7c7190c 859
GordonSin 0:0ed2a7c7190c 860
GordonSin 0:0ed2a7c7190c 861 /*
GordonSin 0:0ed2a7c7190c 862 * fsm_sdata - Send some data.
GordonSin 0:0ed2a7c7190c 863 *
GordonSin 0:0ed2a7c7190c 864 * Used for all packets sent to our peer by this module.
GordonSin 0:0ed2a7c7190c 865 */
GordonSin 0:0ed2a7c7190c 866 void
GordonSin 0:0ed2a7c7190c 867 fsm_sdata( fsm *f, u_char code, u_char id, u_char *data, int datalen)
GordonSin 0:0ed2a7c7190c 868 {
GordonSin 0:0ed2a7c7190c 869 u_char *outp;
GordonSin 0:0ed2a7c7190c 870 int outlen;
GordonSin 0:0ed2a7c7190c 871
GordonSin 0:0ed2a7c7190c 872 /* Adjust length to be smaller than MTU */
GordonSin 0:0ed2a7c7190c 873 outp = outpacket_buf[f->unit];
GordonSin 0:0ed2a7c7190c 874 if (datalen > peer_mru[f->unit] - (int)HEADERLEN) {
GordonSin 0:0ed2a7c7190c 875 datalen = peer_mru[f->unit] - HEADERLEN;
GordonSin 0:0ed2a7c7190c 876 }
GordonSin 0:0ed2a7c7190c 877 if (datalen && data != outp + PPP_HDRLEN + HEADERLEN) {
GordonSin 0:0ed2a7c7190c 878 BCOPY(data, outp + PPP_HDRLEN + HEADERLEN, datalen);
GordonSin 0:0ed2a7c7190c 879 }
GordonSin 0:0ed2a7c7190c 880 outlen = datalen + HEADERLEN;
GordonSin 0:0ed2a7c7190c 881 MAKEHEADER(outp, f->protocol);
GordonSin 0:0ed2a7c7190c 882 PUTCHAR(code, outp);
GordonSin 0:0ed2a7c7190c 883 PUTCHAR(id, outp);
GordonSin 0:0ed2a7c7190c 884 PUTSHORT(outlen, outp);
GordonSin 0:0ed2a7c7190c 885 pppWrite(f->unit, outpacket_buf[f->unit], outlen + PPP_HDRLEN);
GordonSin 0:0ed2a7c7190c 886 FSMDEBUG(LOG_INFO, ("fsm_sdata(%s): Sent code %d,%d,%d.\n",
GordonSin 0:0ed2a7c7190c 887 PROTO_NAME(f), code, id, outlen));
GordonSin 0:0ed2a7c7190c 888 }
GordonSin 0:0ed2a7c7190c 889
GordonSin 0:0ed2a7c7190c 890 #endif /* PPP_SUPPORT */