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