1 /*- 2 * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org> 3 * based on work by Toshiharu OHNO <tony-o@iij.ad.jp> 4 * Internet Initiative Japan, Inc (IIJ) 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <sys/param.h> 32 #include <netinet/in.h> 33 #include <netinet/in_systm.h> 34 #include <netinet/ip.h> 35 #include <sys/socket.h> 36 #include <sys/un.h> 37 38 #include <signal.h> 39 #include <stdarg.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <termios.h> 44 #include <unistd.h> 45 46 #include "layer.h" 47 #include "ua.h" 48 #include "defs.h" 49 #include "command.h" 50 #include "mbuf.h" 51 #include "log.h" 52 #include "timer.h" 53 #include "fsm.h" 54 #include "iplist.h" 55 #include "throughput.h" 56 #include "proto.h" 57 #include "descriptor.h" 58 #include "lqr.h" 59 #include "hdlc.h" 60 #include "lcp.h" 61 #include "ccp.h" 62 #include "async.h" 63 #include "link.h" 64 #include "physical.h" 65 #include "prompt.h" 66 #include "slcompress.h" 67 #include "ncpaddr.h" 68 #include "ipcp.h" 69 #include "filter.h" 70 #include "mp.h" 71 #include "chat.h" 72 #include "auth.h" 73 #include "chap.h" 74 #include "cbcp.h" 75 #include "datalink.h" 76 #ifndef NORADIUS 77 #include "radius.h" 78 #endif 79 #include "ipv6cp.h" 80 #include "ncp.h" 81 #include "bundle.h" 82 83 /* for received LQRs */ 84 struct lqrreq { 85 struct fsm_opt_hdr hdr; 86 u_short proto; /* Quality protocol */ 87 u_int32_t period; /* Reporting interval */ 88 }; 89 90 static int LcpLayerUp(struct fsm *); 91 static void LcpLayerDown(struct fsm *); 92 static void LcpLayerStart(struct fsm *); 93 static void LcpLayerFinish(struct fsm *); 94 static void LcpInitRestartCounter(struct fsm *, int); 95 static void LcpSendConfigReq(struct fsm *); 96 static void LcpSentTerminateReq(struct fsm *); 97 static void LcpSendTerminateAck(struct fsm *, u_char); 98 static void LcpDecodeConfig(struct fsm *, u_char *, u_char *, int, 99 struct fsm_decode *); 100 101 static struct fsm_callbacks lcp_Callbacks = { 102 LcpLayerUp, 103 LcpLayerDown, 104 LcpLayerStart, 105 LcpLayerFinish, 106 LcpInitRestartCounter, 107 LcpSendConfigReq, 108 LcpSentTerminateReq, 109 LcpSendTerminateAck, 110 LcpDecodeConfig, 111 fsm_NullRecvResetReq, 112 fsm_NullRecvResetAck 113 }; 114 115 static const char * const lcp_TimerNames[] = 116 {"LCP restart", "LCP openmode", "LCP stopped"}; 117 118 static const char * 119 protoname(int proto) 120 { 121 static const char * const cftypes[] = { 122 /* Check out the latest ``Assigned numbers'' rfc (1700) */ 123 NULL, 124 "MRU", /* 1: Maximum-Receive-Unit */ 125 "ACCMAP", /* 2: Async-Control-Character-Map */ 126 "AUTHPROTO", /* 3: Authentication-Protocol */ 127 "QUALPROTO", /* 4: Quality-Protocol */ 128 "MAGICNUM", /* 5: Magic-Number */ 129 "RESERVED", /* 6: RESERVED */ 130 "PROTOCOMP", /* 7: Protocol-Field-Compression */ 131 "ACFCOMP", /* 8: Address-and-Control-Field-Compression */ 132 "FCSALT", /* 9: FCS-Alternatives */ 133 "SDP", /* 10: Self-Describing-Pad */ 134 "NUMMODE", /* 11: Numbered-Mode */ 135 "MULTIPROC", /* 12: Multi-Link-Procedure */ 136 "CALLBACK", /* 13: Callback */ 137 "CONTIME", /* 14: Connect-Time */ 138 "COMPFRAME", /* 15: Compound-Frames */ 139 "NDE", /* 16: Nominal-Data-Encapsulation */ 140 "MRRU", /* 17: Multilink-MRRU */ 141 "SHORTSEQ", /* 18: Multilink-Short-Sequence-Number-Header */ 142 "ENDDISC", /* 19: Multilink-Endpoint-Discriminator */ 143 "PROPRIETRY", /* 20: Proprietary */ 144 "DCEID", /* 21: DCE-Identifier */ 145 "MULTIPP", /* 22: Multi-Link-Plus-Procedure */ 146 "LDBACP", /* 23: Link Discriminator for BACP */ 147 }; 148 149 if (proto < 0 || proto > sizeof cftypes / sizeof *cftypes || 150 cftypes[proto] == NULL) 151 return HexStr(proto, NULL, 0); 152 153 return cftypes[proto]; 154 } 155 156 int 157 lcp_ReportStatus(struct cmdargs const *arg) 158 { 159 struct link *l; 160 struct lcp *lcp; 161 162 l = command_ChooseLink(arg); 163 lcp = &l->lcp; 164 165 prompt_Printf(arg->prompt, "%s: %s [%s]\n", l->name, lcp->fsm.name, 166 State2Nam(lcp->fsm.state)); 167 prompt_Printf(arg->prompt, 168 " his side: MRU %d, ACCMAP %08lx, PROTOCOMP %s, ACFCOMP %s,\n" 169 " MAGIC %08lx, MRRU %u, SHORTSEQ %s, REJECT %04x\n", 170 lcp->his_mru, (u_long)lcp->his_accmap, 171 lcp->his_protocomp ? "on" : "off", 172 lcp->his_acfcomp ? "on" : "off", 173 (u_long)lcp->his_magic, lcp->his_mrru, 174 lcp->his_shortseq ? "on" : "off", lcp->his_reject); 175 prompt_Printf(arg->prompt, 176 " my side: MRU %d, ACCMAP %08lx, PROTOCOMP %s, ACFCOMP %s,\n" 177 " MAGIC %08lx, MRRU %u, SHORTSEQ %s, REJECT %04x\n", 178 lcp->want_mru, (u_long)lcp->want_accmap, 179 lcp->want_protocomp ? "on" : "off", 180 lcp->want_acfcomp ? "on" : "off", 181 (u_long)lcp->want_magic, lcp->want_mrru, 182 lcp->want_shortseq ? "on" : "off", lcp->my_reject); 183 184 if (lcp->cfg.mru) 185 prompt_Printf(arg->prompt, "\n Defaults: MRU = %d (max %d), ", 186 lcp->cfg.mru, lcp->cfg.max_mru); 187 else 188 prompt_Printf(arg->prompt, "\n Defaults: MRU = any (max %d), ", 189 lcp->cfg.max_mru); 190 if (lcp->cfg.mtu) 191 prompt_Printf(arg->prompt, "MTU = %d (max %d), ", 192 lcp->cfg.mtu, lcp->cfg.max_mtu); 193 else 194 prompt_Printf(arg->prompt, "MTU = any (max %d), ", lcp->cfg.max_mtu); 195 prompt_Printf(arg->prompt, "ACCMAP = %08lx\n", (u_long)lcp->cfg.accmap); 196 prompt_Printf(arg->prompt, " LQR period = %us, ", 197 lcp->cfg.lqrperiod); 198 prompt_Printf(arg->prompt, "Open Mode = %s", 199 lcp->cfg.openmode == OPEN_PASSIVE ? "passive" : "active"); 200 if (lcp->cfg.openmode > 0) 201 prompt_Printf(arg->prompt, " (delay %ds)", lcp->cfg.openmode); 202 prompt_Printf(arg->prompt, "\n FSM retry = %us, max %u Config" 203 " REQ%s, %u Term REQ%s\n", lcp->cfg.fsm.timeout, 204 lcp->cfg.fsm.maxreq, lcp->cfg.fsm.maxreq == 1 ? "" : "s", 205 lcp->cfg.fsm.maxtrm, lcp->cfg.fsm.maxtrm == 1 ? "" : "s"); 206 prompt_Printf(arg->prompt, " Ident: %s\n", lcp->cfg.ident); 207 prompt_Printf(arg->prompt, "\n Negotiation:\n"); 208 prompt_Printf(arg->prompt, " ACFCOMP = %s\n", 209 command_ShowNegval(lcp->cfg.acfcomp)); 210 prompt_Printf(arg->prompt, " CHAP = %s\n", 211 command_ShowNegval(lcp->cfg.chap05)); 212 #ifndef NODES 213 prompt_Printf(arg->prompt, " CHAP80 = %s\n", 214 command_ShowNegval(lcp->cfg.chap80nt)); 215 prompt_Printf(arg->prompt, " LANMan = %s\n", 216 command_ShowNegval(lcp->cfg.chap80lm)); 217 prompt_Printf(arg->prompt, " CHAP81 = %s\n", 218 command_ShowNegval(lcp->cfg.chap81)); 219 #endif 220 prompt_Printf(arg->prompt, " LQR = %s\n", 221 command_ShowNegval(lcp->cfg.lqr)); 222 prompt_Printf(arg->prompt, " PAP = %s\n", 223 command_ShowNegval(lcp->cfg.pap)); 224 prompt_Printf(arg->prompt, " PROTOCOMP = %s\n", 225 command_ShowNegval(lcp->cfg.protocomp)); 226 227 return 0; 228 } 229 230 static u_int32_t 231 GenerateMagic(void) 232 { 233 /* Generate random number which will be used as magic number */ 234 randinit(); 235 return random(); 236 } 237 238 void 239 lcp_SetupCallbacks(struct lcp *lcp) 240 { 241 lcp->fsm.fn = &lcp_Callbacks; 242 lcp->fsm.FsmTimer.name = lcp_TimerNames[0]; 243 lcp->fsm.OpenTimer.name = lcp_TimerNames[1]; 244 lcp->fsm.StoppedTimer.name = lcp_TimerNames[2]; 245 } 246 247 void 248 lcp_Init(struct lcp *lcp, struct bundle *bundle, struct link *l, 249 const struct fsm_parent *parent) 250 { 251 /* Initialise ourselves */ 252 int mincode = parent ? 1 : LCP_MINMPCODE; 253 254 fsm_Init(&lcp->fsm, "LCP", PROTO_LCP, mincode, LCP_MAXCODE, LogLCP, 255 bundle, l, parent, &lcp_Callbacks, lcp_TimerNames); 256 257 lcp->cfg.mru = 0; 258 lcp->cfg.max_mru = MAX_MRU; 259 lcp->cfg.mtu = 0; 260 lcp->cfg.max_mtu = MAX_MTU; 261 lcp->cfg.accmap = 0; 262 lcp->cfg.openmode = 1; 263 lcp->cfg.lqrperiod = DEF_LQRPERIOD; 264 lcp->cfg.fsm.timeout = DEF_FSMRETRY; 265 lcp->cfg.fsm.maxreq = DEF_FSMTRIES; 266 lcp->cfg.fsm.maxtrm = DEF_FSMTRIES; 267 268 lcp->cfg.acfcomp = NEG_ENABLED|NEG_ACCEPTED; 269 lcp->cfg.chap05 = NEG_ACCEPTED; 270 #ifndef NODES 271 lcp->cfg.chap80nt = NEG_ACCEPTED; 272 lcp->cfg.chap80lm = 0; 273 lcp->cfg.chap81 = NEG_ACCEPTED; 274 #endif 275 lcp->cfg.lqr = NEG_ACCEPTED; 276 lcp->cfg.pap = NEG_ACCEPTED; 277 lcp->cfg.protocomp = NEG_ENABLED|NEG_ACCEPTED; 278 *lcp->cfg.ident = '\0'; 279 280 lcp_Setup(lcp, lcp->cfg.openmode); 281 } 282 283 void 284 lcp_Setup(struct lcp *lcp, int openmode) 285 { 286 struct physical *p = link2physical(lcp->fsm.link); 287 288 lcp->fsm.open_mode = openmode; 289 290 lcp->his_mru = DEF_MRU; 291 lcp->his_mrru = 0; 292 lcp->his_magic = 0; 293 lcp->his_lqrperiod = 0; 294 lcp->his_acfcomp = 0; 295 lcp->his_auth = 0; 296 lcp->his_authtype = 0; 297 lcp->his_callback.opmask = 0; 298 lcp->his_shortseq = 0; 299 lcp->mru_req = 0; 300 301 if ((lcp->want_mru = lcp->cfg.mru) == 0) 302 lcp->want_mru = DEF_MRU; 303 lcp->want_mrru = lcp->fsm.bundle->ncp.mp.cfg.mrru; 304 lcp->want_shortseq = IsEnabled(lcp->fsm.bundle->ncp.mp.cfg.shortseq) ? 1 : 0; 305 lcp->want_acfcomp = IsEnabled(lcp->cfg.acfcomp) ? 1 : 0; 306 307 if (lcp->fsm.parent) { 308 lcp->his_accmap = 0xffffffff; 309 lcp->want_accmap = lcp->cfg.accmap; 310 lcp->his_protocomp = 0; 311 lcp->want_protocomp = IsEnabled(lcp->cfg.protocomp) ? 1 : 0; 312 lcp->want_magic = GenerateMagic(); 313 314 if (IsEnabled(lcp->cfg.chap05)) { 315 lcp->want_auth = PROTO_CHAP; 316 lcp->want_authtype = 0x05; 317 #ifndef NODES 318 } else if (IsEnabled(lcp->cfg.chap80nt) || 319 IsEnabled(lcp->cfg.chap80lm)) { 320 lcp->want_auth = PROTO_CHAP; 321 lcp->want_authtype = 0x80; 322 } else if (IsEnabled(lcp->cfg.chap81)) { 323 lcp->want_auth = PROTO_CHAP; 324 lcp->want_authtype = 0x81; 325 #endif 326 } else if (IsEnabled(lcp->cfg.pap)) { 327 lcp->want_auth = PROTO_PAP; 328 lcp->want_authtype = 0; 329 } else { 330 lcp->want_auth = 0; 331 lcp->want_authtype = 0; 332 } 333 334 if (p->type != PHYS_DIRECT) 335 memcpy(&lcp->want_callback, &p->dl->cfg.callback, 336 sizeof(struct callback)); 337 else 338 lcp->want_callback.opmask = 0; 339 lcp->want_lqrperiod = IsEnabled(lcp->cfg.lqr) ? 340 lcp->cfg.lqrperiod * 100 : 0; 341 } else { 342 lcp->his_accmap = lcp->want_accmap = 0; 343 lcp->his_protocomp = lcp->want_protocomp = 1; 344 lcp->want_magic = 0; 345 lcp->want_auth = 0; 346 lcp->want_authtype = 0; 347 lcp->want_callback.opmask = 0; 348 lcp->want_lqrperiod = 0; 349 } 350 351 lcp->his_reject = lcp->my_reject = 0; 352 lcp->auth_iwait = lcp->auth_ineed = 0; 353 lcp->LcpFailedMagic = 0; 354 } 355 356 static void 357 LcpInitRestartCounter(struct fsm *fp, int what) 358 { 359 /* Set fsm timer load */ 360 struct lcp *lcp = fsm2lcp(fp); 361 362 fp->FsmTimer.load = lcp->cfg.fsm.timeout * SECTICKS; 363 switch (what) { 364 case FSM_REQ_TIMER: 365 fp->restart = lcp->cfg.fsm.maxreq; 366 break; 367 case FSM_TRM_TIMER: 368 fp->restart = lcp->cfg.fsm.maxtrm; 369 break; 370 default: 371 fp->restart = 1; 372 break; 373 } 374 } 375 376 static void 377 LcpSendConfigReq(struct fsm *fp) 378 { 379 /* Send config REQ please */ 380 struct physical *p = link2physical(fp->link); 381 struct lcp *lcp = fsm2lcp(fp); 382 u_char buff[200]; 383 struct fsm_opt *o; 384 struct mp *mp; 385 u_int16_t proto; 386 u_short maxmru; 387 388 if (!p) { 389 log_Printf(LogERROR, "%s: LcpSendConfigReq: Not a physical link !\n", 390 fp->link->name); 391 return; 392 } 393 394 o = (struct fsm_opt *)buff; 395 if (!physical_IsSync(p)) { 396 if (lcp->want_acfcomp && !REJECTED(lcp, TY_ACFCOMP)) 397 INC_FSM_OPT(TY_ACFCOMP, 2, o); 398 399 if (lcp->want_protocomp && !REJECTED(lcp, TY_PROTOCOMP)) 400 INC_FSM_OPT(TY_PROTOCOMP, 2, o); 401 402 if (!REJECTED(lcp, TY_ACCMAP)) { 403 ua_htonl(&lcp->want_accmap, o->data); 404 INC_FSM_OPT(TY_ACCMAP, 6, o); 405 } 406 } 407 408 maxmru = p ? physical_DeviceMTU(p) : 0; 409 if (lcp->cfg.max_mru && (!maxmru || maxmru > lcp->cfg.max_mru)) 410 maxmru = lcp->cfg.max_mru; 411 if (maxmru && lcp->want_mru > maxmru) { 412 log_Printf(LogWARN, "%s: Reducing configured MRU from %u to %u\n", 413 fp->link->name, lcp->want_mru, maxmru); 414 lcp->want_mru = maxmru; 415 } 416 if (!REJECTED(lcp, TY_MRU)) { 417 ua_htons(&lcp->want_mru, o->data); 418 INC_FSM_OPT(TY_MRU, 4, o); 419 } 420 421 if (lcp->want_magic && !REJECTED(lcp, TY_MAGICNUM)) { 422 ua_htonl(&lcp->want_magic, o->data); 423 INC_FSM_OPT(TY_MAGICNUM, 6, o); 424 } 425 426 if (lcp->want_lqrperiod && !REJECTED(lcp, TY_QUALPROTO)) { 427 proto = PROTO_LQR; 428 ua_htons(&proto, o->data); 429 ua_htonl(&lcp->want_lqrperiod, o->data + 2); 430 INC_FSM_OPT(TY_QUALPROTO, 8, o); 431 } 432 433 switch (lcp->want_auth) { 434 case PROTO_PAP: 435 proto = PROTO_PAP; 436 ua_htons(&proto, o->data); 437 INC_FSM_OPT(TY_AUTHPROTO, 4, o); 438 break; 439 440 case PROTO_CHAP: 441 proto = PROTO_CHAP; 442 ua_htons(&proto, o->data); 443 o->data[2] = lcp->want_authtype; 444 INC_FSM_OPT(TY_AUTHPROTO, 5, o); 445 break; 446 } 447 448 if (!REJECTED(lcp, TY_CALLBACK)) { 449 if (lcp->want_callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) { 450 *o->data = CALLBACK_AUTH; 451 INC_FSM_OPT(TY_CALLBACK, 3, o); 452 } else if (lcp->want_callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) { 453 *o->data = CALLBACK_CBCP; 454 INC_FSM_OPT(TY_CALLBACK, 3, o); 455 } else if (lcp->want_callback.opmask & CALLBACK_BIT(CALLBACK_E164)) { 456 int sz = strlen(lcp->want_callback.msg); 457 458 if (sz > sizeof o->data - 1) { 459 sz = sizeof o->data - 1; 460 log_Printf(LogWARN, "Truncating E164 data to %d octets (oops!)\n", sz); 461 } 462 *o->data = CALLBACK_E164; 463 memcpy(o->data + 1, lcp->want_callback.msg, sz); 464 INC_FSM_OPT(TY_CALLBACK, sz + 3, o); 465 } 466 } 467 468 if (lcp->want_mrru && !REJECTED(lcp, TY_MRRU)) { 469 ua_htons(&lcp->want_mrru, o->data); 470 INC_FSM_OPT(TY_MRRU, 4, o); 471 472 if (lcp->want_shortseq && !REJECTED(lcp, TY_SHORTSEQ)) 473 INC_FSM_OPT(TY_SHORTSEQ, 2, o); 474 } 475 476 mp = &lcp->fsm.bundle->ncp.mp; 477 if (mp->cfg.enddisc.class != 0 && IsEnabled(mp->cfg.negenddisc) && 478 !REJECTED(lcp, TY_ENDDISC)) { 479 *o->data = mp->cfg.enddisc.class; 480 memcpy(o->data+1, mp->cfg.enddisc.address, mp->cfg.enddisc.len); 481 INC_FSM_OPT(TY_ENDDISC, mp->cfg.enddisc.len + 3, o); 482 } 483 484 fsm_Output(fp, CODE_CONFIGREQ, fp->reqid, buff, (u_char *)o - buff, 485 MB_LCPOUT); 486 } 487 488 void 489 lcp_SendProtoRej(struct lcp *lcp, u_char *option, int count) 490 { 491 /* Don't understand `option' */ 492 fsm_Output(&lcp->fsm, CODE_PROTOREJ, lcp->fsm.reqid, option, count, 493 MB_LCPOUT); 494 } 495 496 int 497 lcp_SendIdentification(struct lcp *lcp) 498 { 499 static u_char id; /* Use a private id */ 500 u_char msg[DEF_MRU - 3]; 501 const char *argv[2]; 502 char *exp[2]; 503 504 if (*lcp->cfg.ident == '\0') 505 return 0; 506 507 argv[0] = lcp->cfg.ident; 508 argv[1] = NULL; 509 510 command_Expand(exp, 1, argv, lcp->fsm.bundle, 1, getpid()); 511 512 ua_htonl(&lcp->want_magic, msg); 513 strncpy(msg + 4, exp[0], sizeof msg - 5); 514 msg[sizeof msg - 1] = '\0'; 515 516 fsm_Output(&lcp->fsm, CODE_IDENT, id++, msg, 4 + strlen(msg + 4), MB_LCPOUT); 517 log_Printf(LogLCP, " MAGICNUM %08x\n", lcp->want_magic); 518 log_Printf(LogLCP, " TEXT %s\n", msg + 4); 519 520 command_Free(1, exp); 521 return 1; 522 } 523 524 void 525 lcp_RecvIdentification(struct lcp *lcp, char *data) 526 { 527 log_Printf(LogLCP, " MAGICNUM %08x\n", lcp->his_magic); 528 log_Printf(LogLCP, " TEXT %s\n", data); 529 } 530 531 static void 532 LcpSentTerminateReq(struct fsm *fp) 533 { 534 /* Term REQ just sent by FSM */ 535 } 536 537 static void 538 LcpSendTerminateAck(struct fsm *fp, u_char id) 539 { 540 /* Send Term ACK please */ 541 struct physical *p = link2physical(fp->link); 542 543 if (p && p->dl->state == DATALINK_CBCP) 544 cbcp_ReceiveTerminateReq(p); 545 546 fsm_Output(fp, CODE_TERMACK, id, NULL, 0, MB_LCPOUT); 547 } 548 549 static void 550 LcpLayerStart(struct fsm *fp) 551 { 552 /* We're about to start up ! */ 553 struct lcp *lcp = fsm2lcp(fp); 554 555 log_Printf(LogLCP, "%s: LayerStart\n", fp->link->name); 556 lcp->LcpFailedMagic = 0; 557 fp->more.reqs = fp->more.naks = fp->more.rejs = lcp->cfg.fsm.maxreq * 3; 558 lcp->mru_req = 0; 559 } 560 561 static void 562 LcpLayerFinish(struct fsm *fp) 563 { 564 /* We're now down */ 565 log_Printf(LogLCP, "%s: LayerFinish\n", fp->link->name); 566 } 567 568 static int 569 LcpLayerUp(struct fsm *fp) 570 { 571 /* We're now up */ 572 struct physical *p = link2physical(fp->link); 573 struct lcp *lcp = fsm2lcp(fp); 574 575 log_Printf(LogLCP, "%s: LayerUp\n", fp->link->name); 576 physical_SetAsyncParams(p, lcp->want_accmap, lcp->his_accmap); 577 lqr_Start(lcp); 578 hdlc_StartTimer(&p->hdlc); 579 fp->more.reqs = fp->more.naks = fp->more.rejs = lcp->cfg.fsm.maxreq * 3; 580 581 lcp_SendIdentification(lcp); 582 583 return 1; 584 } 585 586 static void 587 LcpLayerDown(struct fsm *fp) 588 { 589 /* About to come down */ 590 struct physical *p = link2physical(fp->link); 591 592 log_Printf(LogLCP, "%s: LayerDown\n", fp->link->name); 593 hdlc_StopTimer(&p->hdlc); 594 lqr_StopTimer(p); 595 lcp_Setup(fsm2lcp(fp), 0); 596 } 597 598 static int 599 E164ok(struct callback *cb, char *req, int sz) 600 { 601 char list[sizeof cb->msg], *next; 602 int len; 603 604 if (!strcmp(cb->msg, "*")) 605 return 1; 606 607 strncpy(list, cb->msg, sizeof list - 1); 608 list[sizeof list - 1] = '\0'; 609 for (next = strtok(list, ","); next; next = strtok(NULL, ",")) { 610 len = strlen(next); 611 if (sz == len && !memcmp(list, req, sz)) 612 return 1; 613 } 614 return 0; 615 } 616 617 static int 618 lcp_auth_nak(struct lcp *lcp, struct fsm_decode *dec) 619 { 620 struct fsm_opt nak; 621 622 nak.hdr.id = TY_AUTHPROTO; 623 624 if (IsAccepted(lcp->cfg.pap)) { 625 nak.hdr.len = 4; 626 nak.data[0] = (unsigned char)(PROTO_PAP >> 8); 627 nak.data[1] = (unsigned char)PROTO_PAP; 628 fsm_nak(dec, &nak); 629 return 1; 630 } 631 632 nak.hdr.len = 5; 633 nak.data[0] = (unsigned char)(PROTO_CHAP >> 8); 634 nak.data[1] = (unsigned char)PROTO_CHAP; 635 636 if (IsAccepted(lcp->cfg.chap05)) { 637 nak.data[2] = 0x05; 638 fsm_nak(dec, &nak); 639 #ifndef NODES 640 } else if (IsAccepted(lcp->cfg.chap80nt) || 641 IsAccepted(lcp->cfg.chap80lm)) { 642 nak.data[2] = 0x80; 643 fsm_nak(dec, &nak); 644 } else if (IsAccepted(lcp->cfg.chap81)) { 645 nak.data[2] = 0x81; 646 fsm_nak(dec, &nak); 647 #endif 648 } else { 649 return 0; 650 } 651 652 return 1; 653 } 654 655 static void 656 LcpDecodeConfig(struct fsm *fp, u_char *cp, u_char *end, int mode_type, 657 struct fsm_decode *dec) 658 { 659 /* Deal with incoming PROTO_LCP */ 660 struct lcp *lcp = fsm2lcp(fp); 661 int sz, pos, op, callback_req, chap_type; 662 u_int32_t magic, accmap; 663 u_short mru, phmtu, maxmtu, maxmru, wantmtu, wantmru, proto; 664 struct lqrreq *req; 665 char request[20], desc[22]; 666 struct mp *mp; 667 struct physical *p = link2physical(fp->link); 668 struct fsm_opt *opt, nak; 669 670 sz = op = callback_req = 0; 671 672 while (end - cp >= sizeof(opt->hdr)) { 673 if ((opt = fsm_readopt(&cp)) == NULL) 674 break; 675 676 snprintf(request, sizeof request, " %s[%d]", protoname(opt->hdr.id), 677 opt->hdr.len); 678 679 switch (opt->hdr.id) { 680 case TY_MRRU: 681 mp = &lcp->fsm.bundle->ncp.mp; 682 ua_ntohs(opt->data, &mru); 683 log_Printf(LogLCP, "%s %u\n", request, mru); 684 685 switch (mode_type) { 686 case MODE_REQ: 687 if (mp->cfg.mrru) { 688 if (REJECTED(lcp, TY_MRRU)) 689 /* Ignore his previous reject so that we REQ next time */ 690 lcp->his_reject &= ~(1 << opt->hdr.id); 691 692 if (mru > MAX_MRU) { 693 /* Push him down to MAX_MRU */ 694 lcp->his_mrru = MAX_MRU; 695 nak.hdr.id = TY_MRRU; 696 nak.hdr.len = 4; 697 ua_htons(&lcp->his_mrru, nak.data); 698 fsm_nak(dec, &nak); 699 } else if (mru < MIN_MRU) { 700 /* Push him up to MIN_MRU */ 701 lcp->his_mrru = MIN_MRU; 702 nak.hdr.id = TY_MRRU; 703 nak.hdr.len = 4; 704 ua_htons(&lcp->his_mrru, nak.data); 705 fsm_nak(dec, &nak); 706 } else { 707 lcp->his_mrru = mru; 708 fsm_ack(dec, opt); 709 } 710 break; 711 } else { 712 fsm_rej(dec, opt); 713 lcp->my_reject |= (1 << opt->hdr.id); 714 } 715 break; 716 case MODE_NAK: 717 if (mp->cfg.mrru) { 718 if (REJECTED(lcp, TY_MRRU)) 719 /* Must have changed his mind ! */ 720 lcp->his_reject &= ~(1 << opt->hdr.id); 721 722 if (mru > MAX_MRU) 723 lcp->want_mrru = MAX_MRU; 724 else if (mru < MIN_MRU) 725 lcp->want_mrru = MIN_MRU; 726 else 727 lcp->want_mrru = mru; 728 } 729 /* else we honour our config and don't send the suggested REQ */ 730 break; 731 case MODE_REJ: 732 lcp->his_reject |= (1 << opt->hdr.id); 733 lcp->want_mrru = 0; /* Ah well, no multilink :-( */ 734 break; 735 } 736 break; 737 738 case TY_MRU: 739 lcp->mru_req = 1; 740 ua_ntohs(opt->data, &mru); 741 log_Printf(LogLCP, "%s %d\n", request, mru); 742 743 switch (mode_type) { 744 case MODE_REQ: 745 maxmtu = p ? physical_DeviceMTU(p) : 0; 746 if (lcp->cfg.max_mtu && (!maxmtu || maxmtu > lcp->cfg.max_mtu)) 747 maxmtu = lcp->cfg.max_mtu; 748 wantmtu = lcp->cfg.mtu; 749 if (maxmtu && wantmtu > maxmtu) { 750 log_Printf(LogWARN, "%s: Reducing configured MTU from %u to %u\n", 751 fp->link->name, wantmtu, maxmtu); 752 wantmtu = maxmtu; 753 } 754 755 if (maxmtu && mru > maxmtu) { 756 lcp->his_mru = maxmtu; 757 nak.hdr.id = TY_MRU; 758 nak.hdr.len = 4; 759 ua_htons(&lcp->his_mru, nak.data); 760 fsm_nak(dec, &nak); 761 } else if (wantmtu && mru < wantmtu) { 762 /* Push him up to MTU or MIN_MRU */ 763 lcp->his_mru = wantmtu; 764 nak.hdr.id = TY_MRU; 765 nak.hdr.len = 4; 766 ua_htons(&lcp->his_mru, nak.data); 767 fsm_nak(dec, &nak); 768 } else { 769 lcp->his_mru = mru; 770 fsm_ack(dec, opt); 771 } 772 break; 773 case MODE_NAK: 774 maxmru = p ? physical_DeviceMTU(p) : 0; 775 if (lcp->cfg.max_mru && (!maxmru || maxmru > lcp->cfg.max_mru)) 776 maxmru = lcp->cfg.max_mru; 777 wantmru = lcp->cfg.mru > maxmru ? maxmru : lcp->cfg.mru; 778 779 if (wantmru && mru > wantmru) 780 lcp->want_mru = wantmru; 781 else if (mru > maxmru) 782 lcp->want_mru = maxmru; 783 else if (mru < MIN_MRU) 784 lcp->want_mru = MIN_MRU; 785 else 786 lcp->want_mru = mru; 787 break; 788 case MODE_REJ: 789 lcp->his_reject |= (1 << opt->hdr.id); 790 break; 791 } 792 break; 793 794 case TY_ACCMAP: 795 ua_ntohl(opt->data, &accmap); 796 log_Printf(LogLCP, "%s 0x%08lx\n", request, (u_long)accmap); 797 798 switch (mode_type) { 799 case MODE_REQ: 800 lcp->his_accmap = accmap; 801 fsm_ack(dec, opt); 802 break; 803 case MODE_NAK: 804 lcp->want_accmap = accmap; 805 break; 806 case MODE_REJ: 807 lcp->his_reject |= (1 << opt->hdr.id); 808 break; 809 } 810 break; 811 812 case TY_AUTHPROTO: 813 ua_ntohs(opt->data, &proto); 814 chap_type = opt->hdr.len == 5 ? opt->data[2] : 0; 815 816 log_Printf(LogLCP, "%s 0x%04x (%s)\n", request, proto, 817 Auth2Nam(proto, chap_type)); 818 819 switch (mode_type) { 820 case MODE_REQ: 821 switch (proto) { 822 case PROTO_PAP: 823 if (opt->hdr.len == 4 && IsAccepted(lcp->cfg.pap)) { 824 lcp->his_auth = proto; 825 lcp->his_authtype = 0; 826 fsm_ack(dec, opt); 827 } else if (!lcp_auth_nak(lcp, dec)) { 828 lcp->my_reject |= (1 << opt->hdr.id); 829 fsm_rej(dec, opt); 830 } 831 break; 832 833 case PROTO_CHAP: 834 if ((chap_type == 0x05 && IsAccepted(lcp->cfg.chap05)) 835 #ifndef NODES 836 || (chap_type == 0x80 && (IsAccepted(lcp->cfg.chap80nt) || 837 (IsAccepted(lcp->cfg.chap80lm)))) 838 || (chap_type == 0x81 && IsAccepted(lcp->cfg.chap81)) 839 #endif 840 ) { 841 lcp->his_auth = proto; 842 lcp->his_authtype = chap_type; 843 fsm_ack(dec, opt); 844 } else { 845 #ifdef NODES 846 if (chap_type == 0x80) { 847 log_Printf(LogWARN, "CHAP 0x80 not available without DES\n"); 848 } else if (chap_type == 0x81) { 849 log_Printf(LogWARN, "CHAP 0x81 not available without DES\n"); 850 } else 851 #endif 852 if (chap_type != 0x05) 853 log_Printf(LogWARN, "%s not supported\n", 854 Auth2Nam(PROTO_CHAP, chap_type)); 855 856 if (!lcp_auth_nak(lcp, dec)) { 857 lcp->my_reject |= (1 << opt->hdr.id); 858 fsm_rej(dec, opt); 859 } 860 } 861 break; 862 863 default: 864 log_Printf(LogLCP, "%s 0x%04x - not recognised\n", 865 request, proto); 866 if (!lcp_auth_nak(lcp, dec)) { 867 lcp->my_reject |= (1 << opt->hdr.id); 868 fsm_rej(dec, opt); 869 } 870 break; 871 } 872 break; 873 874 case MODE_NAK: 875 switch (proto) { 876 case PROTO_PAP: 877 if (IsEnabled(lcp->cfg.pap)) { 878 lcp->want_auth = PROTO_PAP; 879 lcp->want_authtype = 0; 880 } else { 881 log_Printf(LogLCP, "Peer will only send PAP (not enabled)\n"); 882 lcp->his_reject |= (1 << opt->hdr.id); 883 } 884 break; 885 case PROTO_CHAP: 886 if (chap_type == 0x05 && IsEnabled(lcp->cfg.chap05)) { 887 lcp->want_auth = PROTO_CHAP; 888 lcp->want_authtype = 0x05; 889 #ifndef NODES 890 } else if (chap_type == 0x80 && (IsEnabled(lcp->cfg.chap80nt) || 891 IsEnabled(lcp->cfg.chap80lm))) { 892 lcp->want_auth = PROTO_CHAP; 893 lcp->want_authtype = 0x80; 894 } else if (chap_type == 0x81 && IsEnabled(lcp->cfg.chap81)) { 895 lcp->want_auth = PROTO_CHAP; 896 lcp->want_authtype = 0x81; 897 #endif 898 } else { 899 #ifdef NODES 900 if (chap_type == 0x80) { 901 log_Printf(LogLCP, "Peer will only send MSCHAP (not available" 902 " without DES)\n"); 903 } else if (chap_type == 0x81) { 904 log_Printf(LogLCP, "Peer will only send MSCHAPV2 (not available" 905 " without DES)\n"); 906 } else 907 #endif 908 log_Printf(LogLCP, "Peer will only send %s (not %s)\n", 909 Auth2Nam(PROTO_CHAP, chap_type), 910 #ifndef NODES 911 (chap_type == 0x80 || chap_type == 0x81) ? "configured" : 912 #endif 913 "supported"); 914 lcp->his_reject |= (1 << opt->hdr.id); 915 } 916 break; 917 default: 918 /* We've been NAK'd with something we don't understand :-( */ 919 lcp->his_reject |= (1 << opt->hdr.id); 920 break; 921 } 922 break; 923 924 case MODE_REJ: 925 lcp->his_reject |= (1 << opt->hdr.id); 926 break; 927 } 928 break; 929 930 case TY_QUALPROTO: 931 req = (struct lqrreq *)opt; 932 log_Printf(LogLCP, "%s proto %x, interval %lums\n", 933 request, ntohs(req->proto), (u_long)ntohl(req->period) * 10); 934 switch (mode_type) { 935 case MODE_REQ: 936 if (ntohs(req->proto) != PROTO_LQR || !IsAccepted(lcp->cfg.lqr)) { 937 fsm_rej(dec, opt); 938 lcp->my_reject |= (1 << opt->hdr.id); 939 } else { 940 lcp->his_lqrperiod = ntohl(req->period); 941 if (lcp->his_lqrperiod < MIN_LQRPERIOD * 100) 942 lcp->his_lqrperiod = MIN_LQRPERIOD * 100; 943 req->period = htonl(lcp->his_lqrperiod); 944 fsm_ack(dec, opt); 945 } 946 break; 947 case MODE_NAK: 948 lcp->want_lqrperiod = ntohl(req->period); 949 break; 950 case MODE_REJ: 951 lcp->his_reject |= (1 << opt->hdr.id); 952 break; 953 } 954 break; 955 956 case TY_MAGICNUM: 957 ua_ntohl(opt->data, &magic); 958 log_Printf(LogLCP, "%s 0x%08lx\n", request, (u_long)magic); 959 960 switch (mode_type) { 961 case MODE_REQ: 962 if (lcp->want_magic) { 963 /* Validate magic number */ 964 if (magic == lcp->want_magic) { 965 sigset_t emptyset; 966 967 log_Printf(LogLCP, "Magic is same (%08lx) - %d times\n", 968 (u_long)magic, ++lcp->LcpFailedMagic); 969 lcp->want_magic = GenerateMagic(); 970 fsm_nak(dec, opt); 971 ualarm(TICKUNIT * (4 + 4 * lcp->LcpFailedMagic), 0); 972 sigemptyset(&emptyset); 973 sigsuspend(&emptyset); 974 } else { 975 lcp->his_magic = magic; 976 lcp->LcpFailedMagic = 0; 977 fsm_ack(dec, opt); 978 } 979 } else { 980 lcp->my_reject |= (1 << opt->hdr.id); 981 fsm_rej(dec, opt); 982 } 983 break; 984 case MODE_NAK: 985 log_Printf(LogLCP, " Magic 0x%08lx is NAKed!\n", (u_long)magic); 986 lcp->want_magic = GenerateMagic(); 987 break; 988 case MODE_REJ: 989 log_Printf(LogLCP, " Magic 0x%08x is REJected!\n", magic); 990 lcp->want_magic = 0; 991 lcp->his_reject |= (1 << opt->hdr.id); 992 break; 993 } 994 break; 995 996 case TY_PROTOCOMP: 997 log_Printf(LogLCP, "%s\n", request); 998 999 switch (mode_type) { 1000 case MODE_REQ: 1001 if (IsAccepted(lcp->cfg.protocomp)) { 1002 lcp->his_protocomp = 1; 1003 fsm_ack(dec, opt); 1004 } else { 1005 #ifdef OLDMST 1006 /* MorningStar before v1.3 needs NAK */ 1007 fsm_nak(dec, opt); 1008 #else 1009 fsm_rej(dec, opt); 1010 lcp->my_reject |= (1 << opt->hdr.id); 1011 #endif 1012 } 1013 break; 1014 case MODE_NAK: 1015 case MODE_REJ: 1016 lcp->want_protocomp = 0; 1017 lcp->his_reject |= (1 << opt->hdr.id); 1018 break; 1019 } 1020 break; 1021 1022 case TY_ACFCOMP: 1023 log_Printf(LogLCP, "%s\n", request); 1024 switch (mode_type) { 1025 case MODE_REQ: 1026 if (IsAccepted(lcp->cfg.acfcomp)) { 1027 lcp->his_acfcomp = 1; 1028 fsm_ack(dec, opt); 1029 } else { 1030 #ifdef OLDMST 1031 /* MorningStar before v1.3 needs NAK */ 1032 fsm_nak(dec, opt); 1033 #else 1034 fsm_rej(dec, opt); 1035 lcp->my_reject |= (1 << opt->hdr.id); 1036 #endif 1037 } 1038 break; 1039 case MODE_NAK: 1040 case MODE_REJ: 1041 lcp->want_acfcomp = 0; 1042 lcp->his_reject |= (1 << opt->hdr.id); 1043 break; 1044 } 1045 break; 1046 1047 case TY_SDP: 1048 log_Printf(LogLCP, "%s\n", request); 1049 switch (mode_type) { 1050 case MODE_REQ: 1051 case MODE_NAK: 1052 case MODE_REJ: 1053 break; 1054 } 1055 break; 1056 1057 case TY_CALLBACK: 1058 if (opt->hdr.len == 2) 1059 op = CALLBACK_NONE; 1060 else 1061 op = (int)opt->data[0]; 1062 sz = opt->hdr.len - 3; 1063 switch (op) { 1064 case CALLBACK_AUTH: 1065 log_Printf(LogLCP, "%s Auth\n", request); 1066 break; 1067 case CALLBACK_DIALSTRING: 1068 log_Printf(LogLCP, "%s Dialstring %.*s\n", request, sz, 1069 opt->data + 1); 1070 break; 1071 case CALLBACK_LOCATION: 1072 log_Printf(LogLCP, "%s Location %.*s\n", request, sz, opt->data + 1); 1073 break; 1074 case CALLBACK_E164: 1075 log_Printf(LogLCP, "%s E.164 (%.*s)\n", request, sz, opt->data + 1); 1076 break; 1077 case CALLBACK_NAME: 1078 log_Printf(LogLCP, "%s Name %.*s\n", request, sz, opt->data + 1); 1079 break; 1080 case CALLBACK_CBCP: 1081 log_Printf(LogLCP, "%s CBCP\n", request); 1082 break; 1083 default: 1084 log_Printf(LogLCP, "%s ???\n", request); 1085 break; 1086 } 1087 1088 switch (mode_type) { 1089 case MODE_REQ: 1090 callback_req = 1; 1091 if (p->type != PHYS_DIRECT) { 1092 fsm_rej(dec, opt); 1093 lcp->my_reject |= (1 << opt->hdr.id); 1094 } 1095 nak.hdr.id = opt->hdr.id; 1096 nak.hdr.len = 3; 1097 if ((p->dl->cfg.callback.opmask & CALLBACK_BIT(op)) && 1098 (op != CALLBACK_AUTH || p->link.lcp.want_auth) && 1099 (op != CALLBACK_E164 || 1100 E164ok(&p->dl->cfg.callback, opt->data + 1, sz))) { 1101 lcp->his_callback.opmask = CALLBACK_BIT(op); 1102 if (sz > sizeof lcp->his_callback.msg - 1) { 1103 sz = sizeof lcp->his_callback.msg - 1; 1104 log_Printf(LogWARN, "Truncating option arg to %d octets\n", sz); 1105 } 1106 memcpy(lcp->his_callback.msg, opt->data + 1, sz); 1107 lcp->his_callback.msg[sz] = '\0'; 1108 fsm_ack(dec, opt); 1109 } else if ((p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) && 1110 p->link.lcp.auth_ineed) { 1111 nak.data[0] = CALLBACK_AUTH; 1112 fsm_nak(dec, &nak); 1113 } else if (p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) { 1114 nak.data[0] = CALLBACK_CBCP; 1115 fsm_nak(dec, &nak); 1116 } else if (p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) { 1117 nak.data[0] = CALLBACK_E164; 1118 fsm_nak(dec, &nak); 1119 } else if (p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) { 1120 log_Printf(LogWARN, "Cannot insist on auth callback without" 1121 " PAP or CHAP enabled !\n"); 1122 nak.data[0] = 2; 1123 fsm_nak(dec, &nak); 1124 } else { 1125 lcp->my_reject |= (1 << opt->hdr.id); 1126 fsm_rej(dec, opt); 1127 } 1128 break; 1129 case MODE_NAK: 1130 /* We don't do what he NAKs with, we do things in our preferred order */ 1131 if (lcp->want_callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) 1132 lcp->want_callback.opmask &= ~CALLBACK_BIT(CALLBACK_AUTH); 1133 else if (lcp->want_callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) 1134 lcp->want_callback.opmask &= ~CALLBACK_BIT(CALLBACK_CBCP); 1135 else if (lcp->want_callback.opmask & CALLBACK_BIT(CALLBACK_E164)) 1136 lcp->want_callback.opmask &= ~CALLBACK_BIT(CALLBACK_E164); 1137 if (lcp->want_callback.opmask == CALLBACK_BIT(CALLBACK_NONE)) { 1138 log_Printf(LogPHASE, "Peer NAKd all callbacks, trying none\n"); 1139 lcp->want_callback.opmask = 0; 1140 } else if (!lcp->want_callback.opmask) { 1141 log_Printf(LogPHASE, "Peer NAKd last configured callback\n"); 1142 fsm_Close(&lcp->fsm); 1143 } 1144 break; 1145 case MODE_REJ: 1146 if (lcp->want_callback.opmask & CALLBACK_BIT(CALLBACK_NONE)) { 1147 lcp->his_reject |= (1 << opt->hdr.id); 1148 lcp->want_callback.opmask = 0; 1149 } else { 1150 log_Printf(LogPHASE, "Peer rejected *required* callback\n"); 1151 fsm_Close(&lcp->fsm); 1152 } 1153 break; 1154 } 1155 break; 1156 1157 case TY_SHORTSEQ: 1158 mp = &lcp->fsm.bundle->ncp.mp; 1159 log_Printf(LogLCP, "%s\n", request); 1160 1161 switch (mode_type) { 1162 case MODE_REQ: 1163 if (lcp->want_mrru && IsAccepted(mp->cfg.shortseq)) { 1164 lcp->his_shortseq = 1; 1165 fsm_ack(dec, opt); 1166 } else { 1167 fsm_rej(dec, opt); 1168 lcp->my_reject |= (1 << opt->hdr.id); 1169 } 1170 break; 1171 case MODE_NAK: 1172 /* 1173 * He's trying to get us to ask for short sequence numbers. 1174 * We ignore the NAK and honour our configuration file instead. 1175 */ 1176 break; 1177 case MODE_REJ: 1178 lcp->his_reject |= (1 << opt->hdr.id); 1179 lcp->want_shortseq = 0; /* For when we hit MP */ 1180 break; 1181 } 1182 break; 1183 1184 case TY_ENDDISC: 1185 mp = &lcp->fsm.bundle->ncp.mp; 1186 log_Printf(LogLCP, "%s %s\n", request, 1187 mp_Enddisc(opt->data[0], opt->data + 1, opt->hdr.len - 3)); 1188 switch (mode_type) { 1189 case MODE_REQ: 1190 if (!p) { 1191 log_Printf(LogLCP, " ENDDISC rejected - not a physical link\n"); 1192 fsm_rej(dec, opt); 1193 lcp->my_reject |= (1 << opt->hdr.id); 1194 } else if (!IsAccepted(mp->cfg.negenddisc)) { 1195 lcp->my_reject |= (1 << opt->hdr.id); 1196 fsm_rej(dec, opt); 1197 } else if (opt->hdr.len - 3 < sizeof p->dl->peer.enddisc.address && 1198 opt->data[0] <= MAX_ENDDISC_CLASS) { 1199 p->dl->peer.enddisc.class = opt->data[0]; 1200 p->dl->peer.enddisc.len = opt->hdr.len - 3; 1201 memcpy(p->dl->peer.enddisc.address, opt->data + 1, opt->hdr.len - 3); 1202 p->dl->peer.enddisc.address[opt->hdr.len - 3] = '\0'; 1203 /* XXX: If mp->active, compare and NAK with mp->peer ? */ 1204 fsm_ack(dec, opt); 1205 } else { 1206 if (opt->data[0] > MAX_ENDDISC_CLASS) 1207 log_Printf(LogLCP, " ENDDISC rejected - unrecognised class %d\n", 1208 opt->data[0]); 1209 else 1210 log_Printf(LogLCP, " ENDDISC rejected - local max length is %ld\n", 1211 (long)(sizeof p->dl->peer.enddisc.address - 1)); 1212 fsm_rej(dec, opt); 1213 lcp->my_reject |= (1 << opt->hdr.id); 1214 } 1215 break; 1216 1217 case MODE_NAK: /* Treat this as a REJ, we don't vary our disc (yet) */ 1218 case MODE_REJ: 1219 lcp->his_reject |= (1 << opt->hdr.id); 1220 break; 1221 } 1222 break; 1223 1224 default: 1225 sz = (sizeof desc - 2) / 2; 1226 if (sz > opt->hdr.len - 2) 1227 sz = opt->hdr.len - 2; 1228 pos = 0; 1229 desc[0] = sz ? ' ' : '\0'; 1230 for (pos = 0; sz--; pos++) 1231 sprintf(desc+(pos<<1)+1, "%02x", opt->data[pos]); 1232 1233 log_Printf(LogLCP, "%s%s\n", request, desc); 1234 1235 if (mode_type == MODE_REQ) { 1236 fsm_rej(dec, opt); 1237 lcp->my_reject |= (1 << opt->hdr.id); 1238 } 1239 break; 1240 } 1241 } 1242 1243 if (mode_type != MODE_NOP) { 1244 if (mode_type == MODE_REQ && p && p->type == PHYS_DIRECT && 1245 p->dl->cfg.callback.opmask && !callback_req && 1246 !(p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_NONE))) { 1247 /* We *REQUIRE* that the peer requests callback */ 1248 nak.hdr.id = TY_CALLBACK; 1249 nak.hdr.len = 3; 1250 if ((p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_AUTH)) && 1251 p->link.lcp.want_auth) 1252 nak.data[0] = CALLBACK_AUTH; 1253 else if (p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_CBCP)) 1254 nak.data[0] = CALLBACK_CBCP; 1255 else if (p->dl->cfg.callback.opmask & CALLBACK_BIT(CALLBACK_E164)) 1256 nak.data[0] = CALLBACK_E164; 1257 else { 1258 log_Printf(LogWARN, "Cannot insist on auth callback without" 1259 " PAP or CHAP enabled !\n"); 1260 nak.hdr.len = 2; /* XXX: Silly ! */ 1261 } 1262 fsm_nak(dec, &nak); 1263 } 1264 if (mode_type == MODE_REQ && !lcp->mru_req) { 1265 mru = DEF_MRU; 1266 phmtu = p ? physical_DeviceMTU(p) : 0; 1267 if (phmtu && mru > phmtu) 1268 mru = phmtu; 1269 if (mru > lcp->cfg.max_mtu) 1270 mru = lcp->cfg.max_mtu; 1271 if (mru < DEF_MRU) { 1272 /* Don't let the peer use the default MRU */ 1273 lcp->his_mru = lcp->cfg.mtu && lcp->cfg.mtu < mru ? lcp->cfg.mtu : mru; 1274 nak.hdr.id = TY_MRU; 1275 nak.hdr.len = 4; 1276 ua_htons(&lcp->his_mru, nak.data); 1277 fsm_nak(dec, &nak); 1278 lcp->mru_req = 1; /* Don't keep NAK'ing this */ 1279 } 1280 } 1281 fsm_opt_normalise(dec); 1282 } 1283 } 1284 1285 extern struct mbuf * 1286 lcp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp) 1287 { 1288 /* Got PROTO_LCP from link */ 1289 m_settype(bp, MB_LCPIN); 1290 fsm_Input(&l->lcp.fsm, bp); 1291 return NULL; 1292 } 1293