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_systm.h> 33 #include <netinet/in.h> 34 #include <netinet/ip.h> 35 #include <arpa/inet.h> 36 #include <sys/socket.h> 37 #include <net/if.h> 38 #include <net/route.h> 39 #include <netdb.h> 40 #include <sys/un.h> 41 42 #include <errno.h> 43 #include <fcntl.h> 44 #include <resolv.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <sys/stat.h> 48 #include <termios.h> 49 #include <unistd.h> 50 51 #ifndef NONAT 52 #ifdef LOCALNAT 53 #include "alias.h" 54 #else 55 #include <alias.h> 56 #endif 57 #endif 58 59 #include "layer.h" 60 #include "ua.h" 61 #include "defs.h" 62 #include "command.h" 63 #include "mbuf.h" 64 #include "log.h" 65 #include "timer.h" 66 #include "fsm.h" 67 #include "proto.h" 68 #include "iplist.h" 69 #include "throughput.h" 70 #include "slcompress.h" 71 #include "lqr.h" 72 #include "hdlc.h" 73 #include "lcp.h" 74 #include "ncpaddr.h" 75 #include "ip.h" 76 #include "ipcp.h" 77 #include "filter.h" 78 #include "descriptor.h" 79 #include "vjcomp.h" 80 #include "async.h" 81 #include "ccp.h" 82 #include "link.h" 83 #include "physical.h" 84 #include "mp.h" 85 #ifndef NORADIUS 86 #include "radius.h" 87 #endif 88 #include "ipv6cp.h" 89 #include "ncp.h" 90 #include "bundle.h" 91 #include "id.h" 92 #include "arp.h" 93 #include "systems.h" 94 #include "prompt.h" 95 #include "route.h" 96 #include "iface.h" 97 98 #undef REJECTED 99 #define REJECTED(p, x) ((p)->peer_reject & (1<<(x))) 100 #define issep(ch) ((ch) == ' ' || (ch) == '\t') 101 #define isip(ch) (((ch) >= '0' && (ch) <= '9') || (ch) == '.') 102 103 struct compreq { 104 u_short proto; 105 u_char slots; 106 u_char compcid; 107 }; 108 109 static int IpcpLayerUp(struct fsm *); 110 static void IpcpLayerDown(struct fsm *); 111 static void IpcpLayerStart(struct fsm *); 112 static void IpcpLayerFinish(struct fsm *); 113 static void IpcpInitRestartCounter(struct fsm *, int); 114 static void IpcpSendConfigReq(struct fsm *); 115 static void IpcpSentTerminateReq(struct fsm *); 116 static void IpcpSendTerminateAck(struct fsm *, u_char); 117 static void IpcpDecodeConfig(struct fsm *, u_char *, u_char *, int, 118 struct fsm_decode *); 119 120 static struct fsm_callbacks ipcp_Callbacks = { 121 IpcpLayerUp, 122 IpcpLayerDown, 123 IpcpLayerStart, 124 IpcpLayerFinish, 125 IpcpInitRestartCounter, 126 IpcpSendConfigReq, 127 IpcpSentTerminateReq, 128 IpcpSendTerminateAck, 129 IpcpDecodeConfig, 130 fsm_NullRecvResetReq, 131 fsm_NullRecvResetAck 132 }; 133 134 static const char * 135 protoname(int proto) 136 { 137 static struct { 138 int id; 139 const char *txt; 140 } cftypes[] = { 141 /* Check out the latest ``Assigned numbers'' rfc (rfc1700.txt) */ 142 { 1, "IPADDRS" }, /* IP-Addresses */ /* deprecated */ 143 { 2, "COMPPROTO" }, /* IP-Compression-Protocol */ 144 { 3, "IPADDR" }, /* IP-Address */ 145 { 129, "PRIDNS" }, /* 129: Primary DNS Server Address */ 146 { 130, "PRINBNS" }, /* 130: Primary NBNS Server Address */ 147 { 131, "SECDNS" }, /* 131: Secondary DNS Server Address */ 148 { 132, "SECNBNS" } /* 132: Secondary NBNS Server Address */ 149 }; 150 int f; 151 152 for (f = 0; f < sizeof cftypes / sizeof *cftypes; f++) 153 if (cftypes[f].id == proto) 154 return cftypes[f].txt; 155 156 return NumStr(proto, NULL, 0); 157 } 158 159 void 160 ipcp_AddInOctets(struct ipcp *ipcp, int n) 161 { 162 throughput_addin(&ipcp->throughput, n); 163 } 164 165 void 166 ipcp_AddOutOctets(struct ipcp *ipcp, int n) 167 { 168 throughput_addout(&ipcp->throughput, n); 169 } 170 171 void 172 ipcp_LoadDNS(struct ipcp *ipcp) 173 { 174 int fd; 175 176 ipcp->ns.dns[0].s_addr = ipcp->ns.dns[1].s_addr = INADDR_NONE; 177 178 if (ipcp->ns.resolv != NULL) { 179 free(ipcp->ns.resolv); 180 ipcp->ns.resolv = NULL; 181 } 182 if (ipcp->ns.resolv_nons != NULL) { 183 free(ipcp->ns.resolv_nons); 184 ipcp->ns.resolv_nons = NULL; 185 } 186 ipcp->ns.resolver = 0; 187 188 if ((fd = open(_PATH_RESCONF, O_RDONLY)) != -1) { 189 struct stat st; 190 191 if (fstat(fd, &st) == 0) { 192 ssize_t got; 193 194 if ((ipcp->ns.resolv_nons = (char *)malloc(st.st_size + 1)) == NULL) 195 log_Printf(LogERROR, "Failed to malloc %lu for %s: %s\n", 196 (unsigned long)st.st_size, _PATH_RESCONF, strerror(errno)); 197 else if ((ipcp->ns.resolv = (char *)malloc(st.st_size + 1)) == NULL) { 198 log_Printf(LogERROR, "Failed(2) to malloc %lu for %s: %s\n", 199 (unsigned long)st.st_size, _PATH_RESCONF, strerror(errno)); 200 free(ipcp->ns.resolv_nons); 201 ipcp->ns.resolv_nons = NULL; 202 } else if ((got = read(fd, ipcp->ns.resolv, st.st_size)) != st.st_size) { 203 if (got == -1) 204 log_Printf(LogERROR, "Failed to read %s: %s\n", 205 _PATH_RESCONF, strerror(errno)); 206 else 207 log_Printf(LogERROR, "Failed to read %s, got %lu not %lu\n", 208 _PATH_RESCONF, (unsigned long)got, 209 (unsigned long)st.st_size); 210 free(ipcp->ns.resolv_nons); 211 ipcp->ns.resolv_nons = NULL; 212 free(ipcp->ns.resolv); 213 ipcp->ns.resolv = NULL; 214 } else { 215 char *cp, *cp_nons, *ncp, ch; 216 int n; 217 218 ipcp->ns.resolv[st.st_size] = '\0'; 219 ipcp->ns.resolver = 1; 220 221 cp_nons = ipcp->ns.resolv_nons; 222 cp = ipcp->ns.resolv; 223 n = 0; 224 225 while ((ncp = strstr(cp, "nameserver")) != NULL) { 226 if (ncp != cp) { 227 memcpy(cp_nons, cp, ncp - cp); 228 cp_nons += ncp - cp; 229 } 230 if ((ncp != cp && ncp[-1] != '\n') || !issep(ncp[10])) { 231 memcpy(cp_nons, ncp, 9); 232 cp_nons += 9; 233 cp = ncp + 9; /* Can't match "nameserver" at cp... */ 234 continue; 235 } 236 237 for (cp = ncp + 11; issep(*cp); cp++) /* Skip whitespace */ 238 ; 239 240 for (ncp = cp; isip(*ncp); ncp++) /* Jump over IP */ 241 ; 242 243 ch = *ncp; 244 *ncp = '\0'; 245 if (n < 2 && inet_aton(cp, ipcp->ns.dns)) 246 n++; 247 *ncp = ch; 248 249 if ((cp = strchr(ncp, '\n')) == NULL) /* Point at next line */ 250 cp = ncp + strlen(ncp); 251 else 252 cp++; 253 } 254 strcpy(cp_nons, cp); /* Copy the end - including the NUL */ 255 cp_nons += strlen(cp_nons) - 1; 256 while (cp_nons >= ipcp->ns.resolv_nons && *cp_nons == '\n') 257 *cp_nons-- = '\0'; 258 if (n == 2 && ipcp->ns.dns[0].s_addr == INADDR_ANY) { 259 ipcp->ns.dns[0].s_addr = ipcp->ns.dns[1].s_addr; 260 ipcp->ns.dns[1].s_addr = INADDR_ANY; 261 } 262 bundle_AdjustDNS(ipcp->fsm.bundle); 263 } 264 } else 265 log_Printf(LogERROR, "Failed to stat opened %s: %s\n", 266 _PATH_RESCONF, strerror(errno)); 267 268 close(fd); 269 } 270 } 271 272 int 273 ipcp_WriteDNS(struct ipcp *ipcp) 274 { 275 const char *paddr; 276 mode_t mask; 277 FILE *fp; 278 279 if (ipcp->ns.dns[0].s_addr == INADDR_ANY && 280 ipcp->ns.dns[1].s_addr == INADDR_ANY) { 281 log_Printf(LogIPCP, "%s not modified: All nameservers NAKd\n", 282 _PATH_RESCONF); 283 return 0; 284 } 285 286 if (ipcp->ns.dns[0].s_addr == INADDR_ANY) { 287 ipcp->ns.dns[0].s_addr = ipcp->ns.dns[1].s_addr; 288 ipcp->ns.dns[1].s_addr = INADDR_ANY; 289 } 290 291 mask = umask(022); 292 if ((fp = ID0fopen(_PATH_RESCONF, "w")) != NULL) { 293 umask(mask); 294 if (ipcp->ns.resolv_nons) 295 fputs(ipcp->ns.resolv_nons, fp); 296 paddr = inet_ntoa(ipcp->ns.dns[0]); 297 log_Printf(LogIPCP, "Primary nameserver set to %s\n", paddr); 298 fprintf(fp, "\nnameserver %s\n", paddr); 299 if (ipcp->ns.dns[1].s_addr != INADDR_ANY && 300 ipcp->ns.dns[1].s_addr != INADDR_NONE && 301 ipcp->ns.dns[1].s_addr != ipcp->ns.dns[0].s_addr) { 302 paddr = inet_ntoa(ipcp->ns.dns[1]); 303 log_Printf(LogIPCP, "Secondary nameserver set to %s\n", paddr); 304 fprintf(fp, "nameserver %s\n", paddr); 305 } 306 if (fclose(fp) == EOF) { 307 log_Printf(LogERROR, "write(): Failed updating %s: %s\n", _PATH_RESCONF, 308 strerror(errno)); 309 return 0; 310 } 311 } else 312 umask(mask); 313 314 return 1; 315 } 316 317 void 318 ipcp_RestoreDNS(struct ipcp *ipcp) 319 { 320 if (ipcp->ns.resolver) { 321 ssize_t got; 322 size_t len; 323 int fd; 324 325 if ((fd = ID0open(_PATH_RESCONF, O_WRONLY|O_TRUNC, 0644)) != -1) { 326 len = strlen(ipcp->ns.resolv); 327 if ((got = write(fd, ipcp->ns.resolv, len)) != len) { 328 if (got == -1) 329 log_Printf(LogERROR, "Failed rewriting %s: write: %s\n", 330 _PATH_RESCONF, strerror(errno)); 331 else 332 log_Printf(LogERROR, "Failed rewriting %s: wrote %lu of %lu\n", 333 _PATH_RESCONF, (unsigned long)got, (unsigned long)len); 334 } 335 close(fd); 336 } else 337 log_Printf(LogERROR, "Failed rewriting %s: open: %s\n", _PATH_RESCONF, 338 strerror(errno)); 339 } else if (remove(_PATH_RESCONF) == -1) 340 log_Printf(LogERROR, "Failed removing %s: %s\n", _PATH_RESCONF, 341 strerror(errno)); 342 343 } 344 345 int 346 ipcp_Show(struct cmdargs const *arg) 347 { 348 struct ipcp *ipcp = &arg->bundle->ncp.ipcp; 349 350 prompt_Printf(arg->prompt, "%s [%s]\n", ipcp->fsm.name, 351 State2Nam(ipcp->fsm.state)); 352 if (ipcp->fsm.state == ST_OPENED) { 353 prompt_Printf(arg->prompt, " His side: %s, %s\n", 354 inet_ntoa(ipcp->peer_ip), vj2asc(ipcp->peer_compproto)); 355 prompt_Printf(arg->prompt, " My side: %s, %s\n", 356 inet_ntoa(ipcp->my_ip), vj2asc(ipcp->my_compproto)); 357 prompt_Printf(arg->prompt, " Queued packets: %lu\n", 358 (unsigned long)ipcp_QueueLen(ipcp)); 359 } 360 361 prompt_Printf(arg->prompt, "\nDefaults:\n"); 362 prompt_Printf(arg->prompt, " FSM retry = %us, max %u Config" 363 " REQ%s, %u Term REQ%s\n", ipcp->cfg.fsm.timeout, 364 ipcp->cfg.fsm.maxreq, ipcp->cfg.fsm.maxreq == 1 ? "" : "s", 365 ipcp->cfg.fsm.maxtrm, ipcp->cfg.fsm.maxtrm == 1 ? "" : "s"); 366 prompt_Printf(arg->prompt, " My Address: %s\n", 367 ncprange_ntoa(&ipcp->cfg.my_range)); 368 if (ipcp->cfg.HaveTriggerAddress) 369 prompt_Printf(arg->prompt, " Trigger address: %s\n", 370 inet_ntoa(ipcp->cfg.TriggerAddress)); 371 372 prompt_Printf(arg->prompt, " VJ compression: %s (%d slots %s slot " 373 "compression)\n", command_ShowNegval(ipcp->cfg.vj.neg), 374 ipcp->cfg.vj.slots, ipcp->cfg.vj.slotcomp ? "with" : "without"); 375 376 if (iplist_isvalid(&ipcp->cfg.peer_list)) 377 prompt_Printf(arg->prompt, " His Address: %s\n", 378 ipcp->cfg.peer_list.src); 379 else 380 prompt_Printf(arg->prompt, " His Address: %s\n", 381 ncprange_ntoa(&ipcp->cfg.peer_range)); 382 383 prompt_Printf(arg->prompt, " DNS: %s", 384 ipcp->cfg.ns.dns[0].s_addr == INADDR_NONE ? 385 "none" : inet_ntoa(ipcp->cfg.ns.dns[0])); 386 if (ipcp->cfg.ns.dns[1].s_addr != INADDR_NONE) 387 prompt_Printf(arg->prompt, ", %s", 388 inet_ntoa(ipcp->cfg.ns.dns[1])); 389 prompt_Printf(arg->prompt, ", %s\n", 390 command_ShowNegval(ipcp->cfg.ns.dns_neg)); 391 prompt_Printf(arg->prompt, " Resolver DNS: %s", 392 ipcp->ns.dns[0].s_addr == INADDR_NONE ? 393 "none" : inet_ntoa(ipcp->ns.dns[0])); 394 if (ipcp->ns.dns[1].s_addr != INADDR_NONE && 395 ipcp->ns.dns[1].s_addr != ipcp->ns.dns[0].s_addr) 396 prompt_Printf(arg->prompt, ", %s", 397 inet_ntoa(ipcp->ns.dns[1])); 398 prompt_Printf(arg->prompt, "\n NetBIOS NS: %s, ", 399 inet_ntoa(ipcp->cfg.ns.nbns[0])); 400 prompt_Printf(arg->prompt, "%s\n\n", 401 inet_ntoa(ipcp->cfg.ns.nbns[1])); 402 403 throughput_disp(&ipcp->throughput, arg->prompt); 404 405 return 0; 406 } 407 408 int 409 ipcp_vjset(struct cmdargs const *arg) 410 { 411 if (arg->argc != arg->argn+2) 412 return -1; 413 if (!strcasecmp(arg->argv[arg->argn], "slots")) { 414 int slots; 415 416 slots = atoi(arg->argv[arg->argn+1]); 417 if (slots < 4 || slots > 16) 418 return 1; 419 arg->bundle->ncp.ipcp.cfg.vj.slots = slots; 420 return 0; 421 } else if (!strcasecmp(arg->argv[arg->argn], "slotcomp")) { 422 if (!strcasecmp(arg->argv[arg->argn+1], "on")) 423 arg->bundle->ncp.ipcp.cfg.vj.slotcomp = 1; 424 else if (!strcasecmp(arg->argv[arg->argn+1], "off")) 425 arg->bundle->ncp.ipcp.cfg.vj.slotcomp = 0; 426 else 427 return 2; 428 return 0; 429 } 430 return -1; 431 } 432 433 void 434 ipcp_Init(struct ipcp *ipcp, struct bundle *bundle, struct link *l, 435 const struct fsm_parent *parent) 436 { 437 struct hostent *hp; 438 struct in_addr host; 439 char name[MAXHOSTNAMELEN]; 440 static const char * const timer_names[] = 441 {"IPCP restart", "IPCP openmode", "IPCP stopped"}; 442 443 fsm_Init(&ipcp->fsm, "IPCP", PROTO_IPCP, 1, IPCP_MAXCODE, LogIPCP, 444 bundle, l, parent, &ipcp_Callbacks, timer_names); 445 446 ipcp->cfg.vj.slots = DEF_VJ_STATES; 447 ipcp->cfg.vj.slotcomp = 1; 448 memset(&ipcp->cfg.my_range, '\0', sizeof ipcp->cfg.my_range); 449 450 host.s_addr = htonl(INADDR_LOOPBACK); 451 ipcp->cfg.netmask.s_addr = INADDR_ANY; 452 if (gethostname(name, sizeof name) == 0) { 453 hp = gethostbyname(name); 454 if (hp && hp->h_addrtype == AF_INET && hp->h_length == sizeof host.s_addr) 455 memcpy(&host.s_addr, hp->h_addr, sizeof host.s_addr); 456 } 457 ncprange_setip4(&ipcp->cfg.my_range, host, ipcp->cfg.netmask); 458 ncprange_setip4(&ipcp->cfg.peer_range, ipcp->cfg.netmask, ipcp->cfg.netmask); 459 460 iplist_setsrc(&ipcp->cfg.peer_list, ""); 461 ipcp->cfg.HaveTriggerAddress = 0; 462 463 ipcp->cfg.ns.dns[0].s_addr = INADDR_NONE; 464 ipcp->cfg.ns.dns[1].s_addr = INADDR_NONE; 465 ipcp->cfg.ns.dns_neg = 0; 466 ipcp->cfg.ns.nbns[0].s_addr = INADDR_ANY; 467 ipcp->cfg.ns.nbns[1].s_addr = INADDR_ANY; 468 469 ipcp->cfg.fsm.timeout = DEF_FSMRETRY; 470 ipcp->cfg.fsm.maxreq = DEF_FSMTRIES; 471 ipcp->cfg.fsm.maxtrm = DEF_FSMTRIES; 472 ipcp->cfg.vj.neg = NEG_ENABLED|NEG_ACCEPTED; 473 474 memset(&ipcp->vj, '\0', sizeof ipcp->vj); 475 476 ipcp->ns.resolv = NULL; 477 ipcp->ns.resolv_nons = NULL; 478 ipcp->ns.writable = 1; 479 ipcp_LoadDNS(ipcp); 480 481 throughput_init(&ipcp->throughput, SAMPLE_PERIOD); 482 memset(ipcp->Queue, '\0', sizeof ipcp->Queue); 483 ipcp_Setup(ipcp, INADDR_NONE); 484 } 485 486 void 487 ipcp_Destroy(struct ipcp *ipcp) 488 { 489 throughput_destroy(&ipcp->throughput); 490 491 if (ipcp->ns.resolv != NULL) { 492 free(ipcp->ns.resolv); 493 ipcp->ns.resolv = NULL; 494 } 495 if (ipcp->ns.resolv_nons != NULL) { 496 free(ipcp->ns.resolv_nons); 497 ipcp->ns.resolv_nons = NULL; 498 } 499 } 500 501 void 502 ipcp_SetLink(struct ipcp *ipcp, struct link *l) 503 { 504 ipcp->fsm.link = l; 505 } 506 507 void 508 ipcp_Setup(struct ipcp *ipcp, u_int32_t mask) 509 { 510 struct iface *iface = ipcp->fsm.bundle->iface; 511 struct ncpaddr ipaddr; 512 struct in_addr peer; 513 int pos, n; 514 515 ipcp->fsm.open_mode = 0; 516 ipcp->ifmask.s_addr = mask == INADDR_NONE ? ipcp->cfg.netmask.s_addr : mask; 517 518 if (iplist_isvalid(&ipcp->cfg.peer_list)) { 519 /* Try to give the peer a previously configured IP address */ 520 for (n = 0; n < iface->addrs; n++) { 521 if (!ncpaddr_getip4(&iface->addr[n].peer, &peer)) 522 continue; 523 if ((pos = iplist_ip2pos(&ipcp->cfg.peer_list, peer)) != -1) { 524 ncpaddr_setip4(&ipaddr, iplist_setcurpos(&ipcp->cfg.peer_list, pos)); 525 break; 526 } 527 } 528 if (n == iface->addrs) 529 /* Ok, so none of 'em fit.... pick a random one */ 530 ncpaddr_setip4(&ipaddr, iplist_setrandpos(&ipcp->cfg.peer_list)); 531 532 ncprange_sethost(&ipcp->cfg.peer_range, &ipaddr); 533 } 534 535 ipcp->heis1172 = 0; 536 ipcp->peer_req = 0; 537 ncprange_getip4addr(&ipcp->cfg.peer_range, &ipcp->peer_ip); 538 ipcp->peer_compproto = 0; 539 540 if (ipcp->cfg.HaveTriggerAddress) { 541 /* 542 * Some implementations of PPP require that we send a 543 * *special* value as our address, even though the rfc specifies 544 * full negotiation (e.g. "0.0.0.0" or Not "0.0.0.0"). 545 */ 546 ipcp->my_ip = ipcp->cfg.TriggerAddress; 547 log_Printf(LogIPCP, "Using trigger address %s\n", 548 inet_ntoa(ipcp->cfg.TriggerAddress)); 549 } else { 550 /* 551 * Otherwise, if we've used an IP number before and it's still within 552 * the network specified on the ``set ifaddr'' line, we really 553 * want to keep that IP number so that we can keep any existing 554 * connections that are bound to that IP. 555 */ 556 for (n = 0; n < iface->addrs; n++) { 557 ncprange_getaddr(&iface->addr[n].ifa, &ipaddr); 558 if (ncprange_contains(&ipcp->cfg.my_range, &ipaddr)) { 559 ncpaddr_getip4(&ipaddr, &ipcp->my_ip); 560 break; 561 } 562 } 563 if (n == iface->addrs) 564 ncprange_getip4addr(&ipcp->cfg.my_range, &ipcp->my_ip); 565 } 566 567 if (IsEnabled(ipcp->cfg.vj.neg) 568 #ifndef NORADIUS 569 || (ipcp->fsm.bundle->radius.valid && ipcp->fsm.bundle->radius.vj) 570 #endif 571 ) 572 ipcp->my_compproto = (PROTO_VJCOMP << 16) + 573 ((ipcp->cfg.vj.slots - 1) << 8) + 574 ipcp->cfg.vj.slotcomp; 575 else 576 ipcp->my_compproto = 0; 577 sl_compress_init(&ipcp->vj.cslc, ipcp->cfg.vj.slots - 1); 578 579 ipcp->peer_reject = 0; 580 ipcp->my_reject = 0; 581 582 /* Copy startup values into ipcp->ns.dns */ 583 if (ipcp->cfg.ns.dns[0].s_addr != INADDR_NONE) 584 memcpy(ipcp->ns.dns, ipcp->cfg.ns.dns, sizeof ipcp->ns.dns); 585 } 586 587 static int 588 numaddresses(struct in_addr mask) 589 { 590 u_int32_t bit, haddr; 591 int n; 592 593 haddr = ntohl(mask.s_addr); 594 bit = 1; 595 n = 1; 596 597 do { 598 if (!(haddr & bit)) 599 n <<= 1; 600 } while (bit <<= 1); 601 602 return n; 603 } 604 605 static int 606 ipcp_proxyarp(struct ipcp *ipcp, 607 int (*proxyfun)(struct bundle *, struct in_addr, int), 608 const struct iface_addr *addr) 609 { 610 struct bundle *bundle = ipcp->fsm.bundle; 611 struct in_addr peer, mask, ip; 612 int n, ret, s; 613 614 if (!ncpaddr_getip4(&addr->peer, &peer)) { 615 log_Printf(LogERROR, "Oops, ipcp_proxyarp() called with unexpected addr\n"); 616 return 0; 617 } 618 619 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) { 620 log_Printf(LogERROR, "ipcp_proxyarp: socket: %s\n", 621 strerror(errno)); 622 return 0; 623 } 624 625 ret = 0; 626 627 if (Enabled(bundle, OPT_PROXYALL)) { 628 ncprange_getip4mask(&addr->ifa, &mask); 629 if ((n = numaddresses(mask)) > 256) { 630 log_Printf(LogWARN, "%s: Too many addresses for proxyall\n", 631 ncprange_ntoa(&addr->ifa)); 632 return 0; 633 } 634 ip.s_addr = peer.s_addr & mask.s_addr; 635 if (n >= 4) { 636 ip.s_addr = htonl(ntohl(ip.s_addr) + 1); 637 n -= 2; 638 } 639 while (n) { 640 if (!((ip.s_addr ^ peer.s_addr) & mask.s_addr)) { 641 if (!(ret = (*proxyfun)(bundle, ip, s))) 642 break; 643 n--; 644 } 645 ip.s_addr = htonl(ntohl(ip.s_addr) + 1); 646 } 647 ret = !n; 648 } else if (Enabled(bundle, OPT_PROXY)) 649 ret = (*proxyfun)(bundle, peer, s); 650 651 close(s); 652 653 return ret; 654 } 655 656 static int 657 ipcp_SetIPaddress(struct ipcp *ipcp, struct in_addr myaddr, 658 struct in_addr hisaddr) 659 { 660 struct bundle *bundle = ipcp->fsm.bundle; 661 struct ncpaddr myncpaddr, hisncpaddr; 662 struct ncprange myrange; 663 struct in_addr mask; 664 struct sockaddr_storage ssdst, ssgw, ssmask; 665 struct sockaddr *sadst, *sagw, *samask; 666 667 sadst = (struct sockaddr *)&ssdst; 668 sagw = (struct sockaddr *)&ssgw; 669 samask = (struct sockaddr *)&ssmask; 670 671 ncpaddr_setip4(&hisncpaddr, hisaddr); 672 ncpaddr_setip4(&myncpaddr, myaddr); 673 ncprange_sethost(&myrange, &myncpaddr); 674 675 mask = addr2mask(myaddr); 676 677 if (ipcp->ifmask.s_addr != INADDR_ANY && 678 (ipcp->ifmask.s_addr & mask.s_addr) == mask.s_addr) 679 ncprange_setip4mask(&myrange, ipcp->ifmask); 680 681 if (!iface_Add(bundle->iface, &bundle->ncp, &myrange, &hisncpaddr, 682 IFACE_ADD_FIRST|IFACE_FORCE_ADD|IFACE_SYSTEM)) 683 return 0; 684 685 if (!Enabled(bundle, OPT_IFACEALIAS)) 686 iface_Clear(bundle->iface, &bundle->ncp, AF_INET, 687 IFACE_CLEAR_ALIASES|IFACE_SYSTEM); 688 689 if (bundle->ncp.cfg.sendpipe > 0 || bundle->ncp.cfg.recvpipe > 0) { 690 ncprange_getsa(&myrange, &ssgw, &ssmask); 691 ncpaddr_getsa(&hisncpaddr, &ssdst); 692 rt_Update(bundle, sadst, sagw, samask); 693 } 694 695 if (Enabled(bundle, OPT_SROUTES)) 696 route_Change(bundle, bundle->ncp.route, &myncpaddr, &hisncpaddr); 697 698 #ifndef NORADIUS 699 if (bundle->radius.valid) 700 route_Change(bundle, bundle->radius.routes, &myncpaddr, &hisncpaddr); 701 #endif 702 703 return 1; /* Ok */ 704 } 705 706 static struct in_addr 707 ChooseHisAddr(struct bundle *bundle, struct in_addr gw) 708 { 709 struct in_addr try; 710 u_long f; 711 712 for (f = 0; f < bundle->ncp.ipcp.cfg.peer_list.nItems; f++) { 713 try = iplist_next(&bundle->ncp.ipcp.cfg.peer_list); 714 log_Printf(LogDEBUG, "ChooseHisAddr: Check item %ld (%s)\n", 715 f, inet_ntoa(try)); 716 if (ipcp_SetIPaddress(&bundle->ncp.ipcp, gw, try)) { 717 log_Printf(LogIPCP, "Selected IP address %s\n", inet_ntoa(try)); 718 break; 719 } 720 } 721 722 if (f == bundle->ncp.ipcp.cfg.peer_list.nItems) { 723 log_Printf(LogDEBUG, "ChooseHisAddr: All addresses in use !\n"); 724 try.s_addr = INADDR_ANY; 725 } 726 727 return try; 728 } 729 730 static void 731 IpcpInitRestartCounter(struct fsm *fp, int what) 732 { 733 /* Set fsm timer load */ 734 struct ipcp *ipcp = fsm2ipcp(fp); 735 736 fp->FsmTimer.load = ipcp->cfg.fsm.timeout * SECTICKS; 737 switch (what) { 738 case FSM_REQ_TIMER: 739 fp->restart = ipcp->cfg.fsm.maxreq; 740 break; 741 case FSM_TRM_TIMER: 742 fp->restart = ipcp->cfg.fsm.maxtrm; 743 break; 744 default: 745 fp->restart = 1; 746 break; 747 } 748 } 749 750 static void 751 IpcpSendConfigReq(struct fsm *fp) 752 { 753 /* Send config REQ please */ 754 struct physical *p = link2physical(fp->link); 755 struct ipcp *ipcp = fsm2ipcp(fp); 756 u_char buff[24]; 757 struct fsm_opt *o; 758 759 o = (struct fsm_opt *)buff; 760 761 if ((p && !physical_IsSync(p)) || !REJECTED(ipcp, TY_IPADDR)) { 762 memcpy(o->data, &ipcp->my_ip.s_addr, 4); 763 INC_FSM_OPT(TY_IPADDR, 6, o); 764 } 765 766 if (ipcp->my_compproto && !REJECTED(ipcp, TY_COMPPROTO)) { 767 if (ipcp->heis1172) { 768 u_int16_t proto = PROTO_VJCOMP; 769 770 ua_htons(&proto, o->data); 771 INC_FSM_OPT(TY_COMPPROTO, 4, o); 772 } else { 773 struct compreq req; 774 775 req.proto = htons(ipcp->my_compproto >> 16); 776 req.slots = (ipcp->my_compproto >> 8) & 255; 777 req.compcid = ipcp->my_compproto & 1; 778 memcpy(o->data, &req, 4); 779 INC_FSM_OPT(TY_COMPPROTO, 6, o); 780 } 781 } 782 783 if (IsEnabled(ipcp->cfg.ns.dns_neg)) { 784 if (!REJECTED(ipcp, TY_PRIMARY_DNS - TY_ADJUST_NS)) { 785 memcpy(o->data, &ipcp->ns.dns[0].s_addr, 4); 786 INC_FSM_OPT(TY_PRIMARY_DNS, 6, o); 787 } 788 789 if (!REJECTED(ipcp, TY_SECONDARY_DNS - TY_ADJUST_NS)) { 790 memcpy(o->data, &ipcp->ns.dns[1].s_addr, 4); 791 INC_FSM_OPT(TY_SECONDARY_DNS, 6, o); 792 } 793 } 794 795 fsm_Output(fp, CODE_CONFIGREQ, fp->reqid, buff, (u_char *)o - buff, 796 MB_IPCPOUT); 797 } 798 799 static void 800 IpcpSentTerminateReq(struct fsm *fp) 801 { 802 /* Term REQ just sent by FSM */ 803 } 804 805 static void 806 IpcpSendTerminateAck(struct fsm *fp, u_char id) 807 { 808 /* Send Term ACK please */ 809 fsm_Output(fp, CODE_TERMACK, id, NULL, 0, MB_IPCPOUT); 810 } 811 812 static void 813 IpcpLayerStart(struct fsm *fp) 814 { 815 /* We're about to start up ! */ 816 struct ipcp *ipcp = fsm2ipcp(fp); 817 818 log_Printf(LogIPCP, "%s: LayerStart.\n", fp->link->name); 819 throughput_start(&ipcp->throughput, "IPCP throughput", 820 Enabled(fp->bundle, OPT_THROUGHPUT)); 821 fp->more.reqs = fp->more.naks = fp->more.rejs = ipcp->cfg.fsm.maxreq * 3; 822 ipcp->peer_req = 0; 823 } 824 825 static void 826 IpcpLayerFinish(struct fsm *fp) 827 { 828 /* We're now down */ 829 struct ipcp *ipcp = fsm2ipcp(fp); 830 831 log_Printf(LogIPCP, "%s: LayerFinish.\n", fp->link->name); 832 throughput_stop(&ipcp->throughput); 833 throughput_log(&ipcp->throughput, LogIPCP, NULL); 834 } 835 836 /* 837 * Called from iface_Add() via ncp_IfaceAddrAdded() 838 */ 839 void 840 ipcp_IfaceAddrAdded(struct ipcp *ipcp, const struct iface_addr *addr) 841 { 842 struct bundle *bundle = ipcp->fsm.bundle; 843 844 if (Enabled(bundle, OPT_PROXY) || Enabled(bundle, OPT_PROXYALL)) 845 ipcp_proxyarp(ipcp, arp_SetProxy, addr); 846 } 847 848 /* 849 * Called from iface_Clear() and iface_Delete() via ncp_IfaceAddrDeleted() 850 */ 851 void 852 ipcp_IfaceAddrDeleted(struct ipcp *ipcp, const struct iface_addr *addr) 853 { 854 struct bundle *bundle = ipcp->fsm.bundle; 855 856 if (Enabled(bundle, OPT_PROXY) || Enabled(bundle, OPT_PROXYALL)) 857 ipcp_proxyarp(ipcp, arp_ClearProxy, addr); 858 } 859 860 static void 861 IpcpLayerDown(struct fsm *fp) 862 { 863 /* About to come down */ 864 struct ipcp *ipcp = fsm2ipcp(fp); 865 static int recursing; 866 char addr[16]; 867 868 if (!recursing++) { 869 snprintf(addr, sizeof addr, "%s", inet_ntoa(ipcp->my_ip)); 870 log_Printf(LogIPCP, "%s: LayerDown: %s\n", fp->link->name, addr); 871 872 #ifndef NORADIUS 873 radius_Account(&fp->bundle->radius, &fp->bundle->radacct, 874 fp->bundle->links, RAD_STOP, &ipcp->peer_ip, &ipcp->ifmask, 875 &ipcp->throughput); 876 877 if (fp->bundle->radius.cfg.file && fp->bundle->radius.filterid) 878 system_Select(fp->bundle, fp->bundle->radius.filterid, LINKDOWNFILE, 879 NULL, NULL); 880 #endif 881 882 /* 883 * XXX this stuff should really live in the FSM. Our config should 884 * associate executable sections in files with events. 885 */ 886 if (system_Select(fp->bundle, addr, LINKDOWNFILE, NULL, NULL) < 0) { 887 if (bundle_GetLabel(fp->bundle)) { 888 if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle), 889 LINKDOWNFILE, NULL, NULL) < 0) 890 system_Select(fp->bundle, "MYADDR", LINKDOWNFILE, NULL, NULL); 891 } else 892 system_Select(fp->bundle, "MYADDR", LINKDOWNFILE, NULL, NULL); 893 } 894 895 ipcp_Setup(ipcp, INADDR_NONE); 896 } 897 recursing--; 898 } 899 900 int 901 ipcp_InterfaceUp(struct ipcp *ipcp) 902 { 903 if (!ipcp_SetIPaddress(ipcp, ipcp->my_ip, ipcp->peer_ip)) { 904 log_Printf(LogERROR, "ipcp_InterfaceUp: unable to set ip address\n"); 905 return 0; 906 } 907 908 if (!iface_SetFlags(ipcp->fsm.bundle->iface->name, IFF_UP)) { 909 log_Printf(LogERROR, "ipcp_InterfaceUp: Can't set the IFF_UP flag on %s\n", 910 ipcp->fsm.bundle->iface->name); 911 return 0; 912 } 913 914 #ifndef NONAT 915 if (ipcp->fsm.bundle->NatEnabled) 916 PacketAliasSetAddress(ipcp->my_ip); 917 #endif 918 919 return 1; 920 } 921 922 static int 923 IpcpLayerUp(struct fsm *fp) 924 { 925 /* We're now up */ 926 struct ipcp *ipcp = fsm2ipcp(fp); 927 char tbuff[16]; 928 929 log_Printf(LogIPCP, "%s: LayerUp.\n", fp->link->name); 930 snprintf(tbuff, sizeof tbuff, "%s", inet_ntoa(ipcp->my_ip)); 931 log_Printf(LogIPCP, "myaddr %s hisaddr = %s\n", 932 tbuff, inet_ntoa(ipcp->peer_ip)); 933 934 if (ipcp->peer_compproto >> 16 == PROTO_VJCOMP) 935 sl_compress_init(&ipcp->vj.cslc, (ipcp->peer_compproto >> 8) & 255); 936 937 if (!ipcp_InterfaceUp(ipcp)) 938 return 0; 939 940 #ifndef NORADIUS 941 radius_Account(&fp->bundle->radius, &fp->bundle->radacct, fp->bundle->links, 942 RAD_START, &ipcp->peer_ip, &ipcp->ifmask, &ipcp->throughput); 943 944 if (fp->bundle->radius.cfg.file && fp->bundle->radius.filterid) 945 system_Select(fp->bundle, fp->bundle->radius.filterid, LINKUPFILE, 946 NULL, NULL); 947 #endif 948 949 /* 950 * XXX this stuff should really live in the FSM. Our config should 951 * associate executable sections in files with events. 952 */ 953 if (system_Select(fp->bundle, tbuff, LINKUPFILE, NULL, NULL) < 0) { 954 if (bundle_GetLabel(fp->bundle)) { 955 if (system_Select(fp->bundle, bundle_GetLabel(fp->bundle), 956 LINKUPFILE, NULL, NULL) < 0) 957 system_Select(fp->bundle, "MYADDR", LINKUPFILE, NULL, NULL); 958 } else 959 system_Select(fp->bundle, "MYADDR", LINKUPFILE, NULL, NULL); 960 } 961 962 fp->more.reqs = fp->more.naks = fp->more.rejs = ipcp->cfg.fsm.maxreq * 3; 963 log_DisplayPrompts(); 964 965 return 1; 966 } 967 968 static void 969 ipcp_ValidateReq(struct ipcp *ipcp, struct in_addr ip, struct fsm_decode *dec) 970 { 971 struct bundle *bundle = ipcp->fsm.bundle; 972 struct iface *iface = bundle->iface; 973 struct in_addr myaddr, peer; 974 int n; 975 976 if (iplist_isvalid(&ipcp->cfg.peer_list)) { 977 ncprange_getip4addr(&ipcp->cfg.my_range, &myaddr); 978 if (ip.s_addr == INADDR_ANY || 979 iplist_ip2pos(&ipcp->cfg.peer_list, ip) < 0 || 980 !ipcp_SetIPaddress(ipcp, myaddr, ip)) { 981 log_Printf(LogIPCP, "%s: Address invalid or already in use\n", 982 inet_ntoa(ip)); 983 /* 984 * If we've already had a valid address configured for the peer, 985 * try NAKing with that so that we don't have to upset things 986 * too much. 987 */ 988 for (n = 0; n < iface->addrs; n++) { 989 if (!ncpaddr_getip4(&iface->addr[n].peer, &peer)) 990 continue; 991 if (iplist_ip2pos(&ipcp->cfg.peer_list, peer) >= 0) { 992 ipcp->peer_ip = peer; 993 break; 994 } 995 } 996 997 if (n == iface->addrs) { 998 /* Just pick an IP number from our list */ 999 ipcp->peer_ip = ChooseHisAddr(bundle, myaddr); 1000 } 1001 1002 if (ipcp->peer_ip.s_addr == INADDR_ANY) { 1003 *dec->rejend++ = TY_IPADDR; 1004 *dec->rejend++ = 6; 1005 memcpy(dec->rejend, &ip.s_addr, 4); 1006 dec->rejend += 4; 1007 } else { 1008 *dec->nakend++ = TY_IPADDR; 1009 *dec->nakend++ = 6; 1010 memcpy(dec->nakend, &ipcp->peer_ip.s_addr, 4); 1011 dec->nakend += 4; 1012 } 1013 return; 1014 } 1015 } else if (!ncprange_containsip4(&ipcp->cfg.peer_range, ip)) { 1016 /* 1017 * If the destination address is not acceptable, NAK with what we 1018 * want to use. 1019 */ 1020 *dec->nakend++ = TY_IPADDR; 1021 *dec->nakend++ = 6; 1022 for (n = 0; n < iface->addrs; n++) 1023 if (ncprange_contains(&ipcp->cfg.peer_range, &iface->addr[n].peer)) { 1024 /* We prefer the already-configured address */ 1025 ncpaddr_getip4addr(&iface->addr[n].peer, (u_int32_t *)dec->nakend); 1026 break; 1027 } 1028 1029 if (n == iface->addrs) 1030 memcpy(dec->nakend, &ipcp->peer_ip.s_addr, 4); 1031 1032 dec->nakend += 4; 1033 return; 1034 } 1035 1036 ipcp->peer_ip = ip; 1037 *dec->ackend++ = TY_IPADDR; 1038 *dec->ackend++ = 6; 1039 memcpy(dec->ackend, &ip.s_addr, 4); 1040 dec->ackend += 4; 1041 } 1042 1043 static void 1044 IpcpDecodeConfig(struct fsm *fp, u_char *cp, u_char *end, int mode_type, 1045 struct fsm_decode *dec) 1046 { 1047 /* Deal with incoming PROTO_IPCP */ 1048 struct ncpaddr ncpaddr; 1049 struct ipcp *ipcp = fsm2ipcp(fp); 1050 int gotdnsnak; 1051 u_int32_t compproto; 1052 struct compreq *pcomp; 1053 struct in_addr ipaddr, dstipaddr, have_ip; 1054 char tbuff[100], tbuff2[100]; 1055 struct fsm_opt *opt, nak; 1056 1057 gotdnsnak = 0; 1058 1059 while (end - cp >= sizeof(opt->hdr)) { 1060 if ((opt = fsm_readopt(&cp)) == NULL) 1061 break; 1062 1063 snprintf(tbuff, sizeof tbuff, " %s[%d]", protoname(opt->hdr.id), 1064 opt->hdr.len); 1065 1066 switch (opt->hdr.id) { 1067 case TY_IPADDR: /* RFC1332 */ 1068 memcpy(&ipaddr.s_addr, opt->data, 4); 1069 log_Printf(LogIPCP, "%s %s\n", tbuff, inet_ntoa(ipaddr)); 1070 1071 switch (mode_type) { 1072 case MODE_REQ: 1073 ipcp->peer_req = 1; 1074 ipcp_ValidateReq(ipcp, ipaddr, dec); 1075 break; 1076 1077 case MODE_NAK: 1078 if (ncprange_containsip4(&ipcp->cfg.my_range, ipaddr)) { 1079 /* Use address suggested by peer */ 1080 snprintf(tbuff2, sizeof tbuff2, "%s changing address: %s ", tbuff, 1081 inet_ntoa(ipcp->my_ip)); 1082 log_Printf(LogIPCP, "%s --> %s\n", tbuff2, inet_ntoa(ipaddr)); 1083 ipcp->my_ip = ipaddr; 1084 ncpaddr_setip4(&ncpaddr, ipcp->my_ip); 1085 bundle_AdjustFilters(fp->bundle, &ncpaddr, NULL); 1086 } else { 1087 log_Printf(log_IsKept(LogIPCP) ? LogIPCP : LogPHASE, 1088 "%s: Unacceptable address!\n", inet_ntoa(ipaddr)); 1089 fsm_Close(&ipcp->fsm); 1090 } 1091 break; 1092 1093 case MODE_REJ: 1094 ipcp->peer_reject |= (1 << opt->hdr.id); 1095 break; 1096 } 1097 break; 1098 1099 case TY_COMPPROTO: 1100 pcomp = (struct compreq *)opt->data; 1101 compproto = (ntohs(pcomp->proto) << 16) + (pcomp->slots << 8) + 1102 pcomp->compcid; 1103 log_Printf(LogIPCP, "%s %s\n", tbuff, vj2asc(compproto)); 1104 1105 switch (mode_type) { 1106 case MODE_REQ: 1107 if (!IsAccepted(ipcp->cfg.vj.neg)) 1108 fsm_rej(dec, opt); 1109 else { 1110 switch (opt->hdr.len) { 1111 case 4: /* RFC1172 */ 1112 if (ntohs(pcomp->proto) == PROTO_VJCOMP) { 1113 log_Printf(LogWARN, "Peer is speaking RFC1172 compression " 1114 "protocol !\n"); 1115 ipcp->heis1172 = 1; 1116 ipcp->peer_compproto = compproto; 1117 fsm_ack(dec, opt); 1118 } else { 1119 pcomp->proto = htons(PROTO_VJCOMP); 1120 nak.hdr.id = TY_COMPPROTO; 1121 nak.hdr.len = 4; 1122 memcpy(nak.data, &pcomp, 2); 1123 fsm_nak(dec, &nak); 1124 } 1125 break; 1126 case 6: /* RFC1332 */ 1127 if (ntohs(pcomp->proto) == PROTO_VJCOMP) { 1128 if (pcomp->slots <= MAX_VJ_STATES 1129 && pcomp->slots >= MIN_VJ_STATES) { 1130 /* Ok, we can do that */ 1131 ipcp->peer_compproto = compproto; 1132 ipcp->heis1172 = 0; 1133 fsm_ack(dec, opt); 1134 } else { 1135 /* Get as close as we can to what he wants */ 1136 ipcp->heis1172 = 0; 1137 pcomp->slots = pcomp->slots < MIN_VJ_STATES ? 1138 MIN_VJ_STATES : MAX_VJ_STATES; 1139 nak.hdr.id = TY_COMPPROTO; 1140 nak.hdr.len = 4; 1141 memcpy(nak.data, &pcomp, 2); 1142 fsm_nak(dec, &nak); 1143 } 1144 } else { 1145 /* What we really want */ 1146 pcomp->proto = htons(PROTO_VJCOMP); 1147 pcomp->slots = DEF_VJ_STATES; 1148 pcomp->compcid = 1; 1149 nak.hdr.id = TY_COMPPROTO; 1150 nak.hdr.len = 6; 1151 memcpy(nak.data, &pcomp, sizeof pcomp); 1152 fsm_nak(dec, &nak); 1153 } 1154 break; 1155 default: 1156 fsm_rej(dec, opt); 1157 break; 1158 } 1159 } 1160 break; 1161 1162 case MODE_NAK: 1163 if (ntohs(pcomp->proto) == PROTO_VJCOMP) { 1164 if (pcomp->slots > MAX_VJ_STATES) 1165 pcomp->slots = MAX_VJ_STATES; 1166 else if (pcomp->slots < MIN_VJ_STATES) 1167 pcomp->slots = MIN_VJ_STATES; 1168 compproto = (ntohs(pcomp->proto) << 16) + (pcomp->slots << 8) + 1169 pcomp->compcid; 1170 } else 1171 compproto = 0; 1172 log_Printf(LogIPCP, "%s changing compproto: %08x --> %08x\n", 1173 tbuff, ipcp->my_compproto, compproto); 1174 ipcp->my_compproto = compproto; 1175 break; 1176 1177 case MODE_REJ: 1178 ipcp->peer_reject |= (1 << opt->hdr.id); 1179 break; 1180 } 1181 break; 1182 1183 case TY_IPADDRS: /* RFC1172 */ 1184 memcpy(&ipaddr.s_addr, opt->data, 4); 1185 memcpy(&dstipaddr.s_addr, opt->data + 4, 4); 1186 snprintf(tbuff2, sizeof tbuff2, "%s %s,", tbuff, inet_ntoa(ipaddr)); 1187 log_Printf(LogIPCP, "%s %s\n", tbuff2, inet_ntoa(dstipaddr)); 1188 1189 switch (mode_type) { 1190 case MODE_REQ: 1191 fsm_rej(dec, opt); 1192 break; 1193 1194 case MODE_NAK: 1195 case MODE_REJ: 1196 break; 1197 } 1198 break; 1199 1200 case TY_PRIMARY_DNS: /* DNS negotiation (rfc1877) */ 1201 case TY_SECONDARY_DNS: 1202 memcpy(&ipaddr.s_addr, opt->data, 4); 1203 log_Printf(LogIPCP, "%s %s\n", tbuff, inet_ntoa(ipaddr)); 1204 1205 switch (mode_type) { 1206 case MODE_REQ: 1207 if (!IsAccepted(ipcp->cfg.ns.dns_neg)) { 1208 ipcp->my_reject |= (1 << (opt->hdr.id - TY_ADJUST_NS)); 1209 fsm_rej(dec, opt); 1210 break; 1211 } 1212 have_ip = ipcp->ns.dns[opt->hdr.id == TY_PRIMARY_DNS ? 0 : 1]; 1213 1214 if (opt->hdr.id == TY_PRIMARY_DNS && ipaddr.s_addr != have_ip.s_addr && 1215 ipaddr.s_addr == ipcp->ns.dns[1].s_addr) { 1216 /* Swap 'em 'round */ 1217 ipcp->ns.dns[0] = ipcp->ns.dns[1]; 1218 ipcp->ns.dns[1] = have_ip; 1219 have_ip = ipcp->ns.dns[0]; 1220 } 1221 1222 if (ipaddr.s_addr != have_ip.s_addr) { 1223 /* 1224 * The client has got the DNS stuff wrong (first request) so 1225 * we'll tell 'em how it is 1226 */ 1227 nak.hdr.id = opt->hdr.id; 1228 nak.hdr.len = 6; 1229 memcpy(nak.data, &have_ip.s_addr, 4); 1230 fsm_nak(dec, &nak); 1231 } else { 1232 /* 1233 * Otherwise they have it right (this time) so we send a ack packet 1234 * back confirming it... end of story 1235 */ 1236 fsm_ack(dec, opt); 1237 } 1238 break; 1239 1240 case MODE_NAK: 1241 if (IsEnabled(ipcp->cfg.ns.dns_neg)) { 1242 gotdnsnak = 1; 1243 memcpy(&ipcp->ns.dns[opt->hdr.id == TY_PRIMARY_DNS ? 0 : 1].s_addr, 1244 opt->data, 4); 1245 } 1246 break; 1247 1248 case MODE_REJ: /* Can't do much, stop asking */ 1249 ipcp->peer_reject |= (1 << (opt->hdr.id - TY_ADJUST_NS)); 1250 break; 1251 } 1252 break; 1253 1254 case TY_PRIMARY_NBNS: /* M$ NetBIOS nameserver hack (rfc1877) */ 1255 case TY_SECONDARY_NBNS: 1256 memcpy(&ipaddr.s_addr, opt->data, 4); 1257 log_Printf(LogIPCP, "%s %s\n", tbuff, inet_ntoa(ipaddr)); 1258 1259 switch (mode_type) { 1260 case MODE_REQ: 1261 have_ip.s_addr = 1262 ipcp->cfg.ns.nbns[opt->hdr.id == TY_PRIMARY_NBNS ? 0 : 1].s_addr; 1263 1264 if (have_ip.s_addr == INADDR_ANY) { 1265 log_Printf(LogIPCP, "NBNS REQ - rejected - nbns not set\n"); 1266 ipcp->my_reject |= (1 << (opt->hdr.id - TY_ADJUST_NS)); 1267 fsm_rej(dec, opt); 1268 break; 1269 } 1270 1271 if (ipaddr.s_addr != have_ip.s_addr) { 1272 nak.hdr.id = opt->hdr.id; 1273 nak.hdr.len = 6; 1274 memcpy(nak.data, &have_ip.s_addr, 4); 1275 fsm_nak(dec, &nak); 1276 } else 1277 fsm_ack(dec, opt); 1278 break; 1279 1280 case MODE_NAK: 1281 log_Printf(LogIPCP, "MS NBNS req %d - NAK??\n", opt->hdr.id); 1282 break; 1283 1284 case MODE_REJ: 1285 log_Printf(LogIPCP, "MS NBNS req %d - REJ??\n", opt->hdr.id); 1286 break; 1287 } 1288 break; 1289 1290 default: 1291 if (mode_type != MODE_NOP) { 1292 ipcp->my_reject |= (1 << opt->hdr.id); 1293 fsm_rej(dec, opt); 1294 } 1295 break; 1296 } 1297 } 1298 1299 if (gotdnsnak) { 1300 if (ipcp->ns.writable) { 1301 log_Printf(LogDEBUG, "Updating resolver\n"); 1302 if (!ipcp_WriteDNS(ipcp)) { 1303 ipcp->peer_reject |= (1 << (TY_PRIMARY_DNS - TY_ADJUST_NS)); 1304 ipcp->peer_reject |= (1 << (TY_SECONDARY_DNS - TY_ADJUST_NS)); 1305 } else 1306 bundle_AdjustDNS(fp->bundle); 1307 } else { 1308 log_Printf(LogDEBUG, "Not updating resolver (readonly)\n"); 1309 bundle_AdjustDNS(fp->bundle); 1310 } 1311 } 1312 1313 if (mode_type != MODE_NOP) { 1314 if (mode_type == MODE_REQ && !ipcp->peer_req) { 1315 if (dec->rejend == dec->rej && dec->nakend == dec->nak) { 1316 /* 1317 * Pretend the peer has requested an IP. 1318 * We do this to ensure that we only send one NAK if the only 1319 * reason for the NAK is because the peer isn't sending a 1320 * TY_IPADDR REQ. This stops us from repeatedly trying to tell 1321 * the peer that we have to have an IP address on their end. 1322 */ 1323 ipcp->peer_req = 1; 1324 } 1325 ipaddr.s_addr = INADDR_ANY; 1326 ipcp_ValidateReq(ipcp, ipaddr, dec); 1327 } 1328 fsm_opt_normalise(dec); 1329 } 1330 } 1331 1332 extern struct mbuf * 1333 ipcp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp) 1334 { 1335 /* Got PROTO_IPCP from link */ 1336 m_settype(bp, MB_IPCPIN); 1337 if (bundle_Phase(bundle) == PHASE_NETWORK) 1338 fsm_Input(&bundle->ncp.ipcp.fsm, bp); 1339 else { 1340 if (bundle_Phase(bundle) < PHASE_NETWORK) 1341 log_Printf(LogIPCP, "%s: Error: Unexpected IPCP in phase %s (ignored)\n", 1342 l->name, bundle_PhaseName(bundle)); 1343 m_freem(bp); 1344 } 1345 return NULL; 1346 } 1347 1348 int 1349 ipcp_UseHisIPaddr(struct bundle *bundle, struct in_addr hisaddr) 1350 { 1351 struct ipcp *ipcp = &bundle->ncp.ipcp; 1352 struct in_addr myaddr; 1353 1354 memset(&ipcp->cfg.peer_range, '\0', sizeof ipcp->cfg.peer_range); 1355 iplist_reset(&ipcp->cfg.peer_list); 1356 ipcp->peer_ip = hisaddr; 1357 ncprange_setip4host(&ipcp->cfg.peer_range, hisaddr); 1358 ncprange_getip4addr(&ipcp->cfg.my_range, &myaddr); 1359 1360 return ipcp_SetIPaddress(ipcp, myaddr, hisaddr); 1361 } 1362 1363 int 1364 ipcp_UseHisaddr(struct bundle *bundle, const char *hisaddr, int setaddr) 1365 { 1366 struct in_addr myaddr; 1367 struct ncp *ncp = &bundle->ncp; 1368 struct ipcp *ipcp = &ncp->ipcp; 1369 struct ncpaddr ncpaddr; 1370 1371 /* Use `hisaddr' for the peers address (set iface if `setaddr') */ 1372 memset(&ipcp->cfg.peer_range, '\0', sizeof ipcp->cfg.peer_range); 1373 iplist_reset(&ipcp->cfg.peer_list); 1374 if (strpbrk(hisaddr, ",-")) { 1375 iplist_setsrc(&ipcp->cfg.peer_list, hisaddr); 1376 if (iplist_isvalid(&ipcp->cfg.peer_list)) { 1377 iplist_setrandpos(&ipcp->cfg.peer_list); 1378 ipcp->peer_ip = ChooseHisAddr(bundle, ipcp->my_ip); 1379 if (ipcp->peer_ip.s_addr == INADDR_ANY) { 1380 log_Printf(LogWARN, "%s: None available !\n", ipcp->cfg.peer_list.src); 1381 return 0; 1382 } 1383 ncprange_setip4host(&ipcp->cfg.peer_range, ipcp->peer_ip); 1384 } else { 1385 log_Printf(LogWARN, "%s: Invalid range !\n", hisaddr); 1386 return 0; 1387 } 1388 } else if (ncprange_aton(&ipcp->cfg.peer_range, ncp, hisaddr) != 0) { 1389 if (ncprange_family(&ipcp->cfg.my_range) != AF_INET) { 1390 log_Printf(LogWARN, "%s: Not an AF_INET address !\n", hisaddr); 1391 return 0; 1392 } 1393 ncprange_getip4addr(&ipcp->cfg.my_range, &myaddr); 1394 ncprange_getip4addr(&ipcp->cfg.peer_range, &ipcp->peer_ip); 1395 1396 if (setaddr && !ipcp_SetIPaddress(ipcp, myaddr, ipcp->peer_ip)) 1397 return 0; 1398 } else 1399 return 0; 1400 1401 ncpaddr_setip4(&ncpaddr, ipcp->peer_ip); 1402 bundle_AdjustFilters(bundle, NULL, &ncpaddr); 1403 1404 return 1; /* Ok */ 1405 } 1406 1407 struct in_addr 1408 addr2mask(struct in_addr addr) 1409 { 1410 u_int32_t haddr = ntohl(addr.s_addr); 1411 1412 haddr = IN_CLASSA(haddr) ? IN_CLASSA_NET : 1413 IN_CLASSB(haddr) ? IN_CLASSB_NET : 1414 IN_CLASSC_NET; 1415 addr.s_addr = htonl(haddr); 1416 1417 return addr; 1418 } 1419 1420 size_t 1421 ipcp_QueueLen(struct ipcp *ipcp) 1422 { 1423 struct mqueue *q; 1424 size_t result; 1425 1426 result = 0; 1427 for (q = ipcp->Queue; q < ipcp->Queue + IPCP_QUEUES(ipcp); q++) 1428 result += q->len; 1429 1430 return result; 1431 } 1432 1433 int 1434 ipcp_PushPacket(struct ipcp *ipcp, struct link *l) 1435 { 1436 struct bundle *bundle = ipcp->fsm.bundle; 1437 struct mqueue *queue; 1438 struct mbuf *bp; 1439 int m_len; 1440 u_int32_t secs = 0; 1441 unsigned alivesecs = 0; 1442 1443 if (ipcp->fsm.state != ST_OPENED) 1444 return 0; 1445 1446 /* 1447 * If ccp is not open but is required, do nothing. 1448 */ 1449 if (l->ccp.fsm.state != ST_OPENED && ccp_Required(&l->ccp)) { 1450 log_Printf(LogPHASE, "%s: Not transmitting... waiting for CCP\n", l->name); 1451 return 0; 1452 } 1453 1454 queue = ipcp->Queue + IPCP_QUEUES(ipcp) - 1; 1455 do { 1456 if (queue->top) { 1457 bp = m_dequeue(queue); 1458 bp = mbuf_Read(bp, &secs, sizeof secs); 1459 bp = m_pullup(bp); 1460 m_len = m_length(bp); 1461 if (!FilterCheck(MBUF_CTOP(bp), AF_INET, &bundle->filter.alive, 1462 &alivesecs)) { 1463 if (secs == 0) 1464 secs = alivesecs; 1465 bundle_StartIdleTimer(bundle, secs); 1466 } 1467 link_PushPacket(l, bp, bundle, 0, PROTO_IP); 1468 ipcp_AddOutOctets(ipcp, m_len); 1469 return 1; 1470 } 1471 } while (queue-- != ipcp->Queue); 1472 1473 return 0; 1474 } 1475