parms.c revision 1.1.1.4
1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if !defined(lint) && !defined(sgi) && !defined(__NetBSD__) 35 static char sccsid[] = "@(#)if.c 8.1 (Berkeley) 6/5/93"; 36 #elif defined(__NetBSD__) 37 static char rcsid[] = "$NetBSD: parms.c,v 1.1.1.4 1998/06/02 17:41:26 thorpej Exp $"; 38 #endif 39 #ident "$Revision: 1.1.1.4 $" 40 41 #include "defs.h" 42 #include "pathnames.h" 43 #include <sys/stat.h> 44 45 46 struct parm *parms; 47 struct intnet *intnets; 48 struct r1net *r1nets; 49 struct tgate *tgates; 50 51 52 /* use configured parameters 53 */ 54 void 55 get_parms(struct interface *ifp) 56 { 57 static warned_auth_in, warned_auth_out; 58 struct parm *parmp; 59 int i, num_passwds = 0; 60 61 /* get all relevant parameters 62 */ 63 for (parmp = parms; parmp != 0; parmp = parmp->parm_next) { 64 if (parmp->parm_name[0] == '\0' 65 || !strcmp(ifp->int_name, parmp->parm_name) 66 || (parmp->parm_name[0] == '\n' 67 && on_net(ifp->int_addr, 68 parmp->parm_net, parmp->parm_mask))) { 69 70 /* This group of parameters is relevant, 71 * so get its settings 72 */ 73 ifp->int_state |= parmp->parm_int_state; 74 for (i = 0; i < MAX_AUTH_KEYS; i++) { 75 if (parmp->parm_auth[0].type == RIP_AUTH_NONE 76 || num_passwds >= MAX_AUTH_KEYS) 77 break; 78 bcopy(&parmp->parm_auth[i], 79 &ifp->int_auth[num_passwds++], 80 sizeof(ifp->int_auth[0])); 81 } 82 if (parmp->parm_rdisc_pref != 0) 83 ifp->int_rdisc_pref = parmp->parm_rdisc_pref; 84 if (parmp->parm_rdisc_int != 0) 85 ifp->int_rdisc_int = parmp->parm_rdisc_int; 86 if (parmp->parm_d_metric != 0) 87 ifp->int_d_metric = parmp->parm_d_metric; 88 } 89 } 90 91 /* Set general defaults. 92 * 93 * Default poor-man's router discovery to a metric that will 94 * be heard by old versions of `routed`. They ignored received 95 * routes with metric 15. 96 */ 97 if ((ifp->int_state & IS_PM_RDISC) 98 && ifp->int_d_metric == 0) 99 ifp->int_d_metric = FAKE_METRIC; 100 101 if (ifp->int_rdisc_int == 0) 102 ifp->int_rdisc_int = DefMaxAdvertiseInterval; 103 104 if (!(ifp->int_if_flags & IFF_MULTICAST) 105 && !(ifp->int_state & IS_REMOTE)) 106 ifp->int_state |= IS_BCAST_RDISC; 107 108 if (ifp->int_if_flags & IFF_POINTOPOINT) { 109 ifp->int_state |= IS_BCAST_RDISC; 110 /* By default, point-to-point links should be passive 111 * about router-discovery for the sake of demand-dialing. 112 */ 113 if (0 == (ifp->int_state & GROUP_IS_SOL_OUT)) 114 ifp->int_state |= IS_NO_SOL_OUT; 115 if (0 == (ifp->int_state & GROUP_IS_ADV_OUT)) 116 ifp->int_state |= IS_NO_ADV_OUT; 117 } 118 119 if (0 != (ifp->int_state & (IS_PASSIVE | IS_REMOTE))) 120 ifp->int_state |= IS_NO_RDISC; 121 if (ifp->int_state & IS_PASSIVE) 122 ifp->int_state |= IS_NO_RIP; 123 124 if (!IS_RIP_IN_OFF(ifp->int_state) 125 && ifp->int_auth[0].type != RIP_AUTH_NONE 126 && !(ifp->int_state & IS_NO_RIPV1_IN) 127 && !warned_auth_in) { 128 msglog("Warning: RIPv1 input via %s" 129 " will be accepted without authentication", 130 ifp->int_name); 131 warned_auth_in = 1; 132 } 133 if (!IS_RIP_OUT_OFF(ifp->int_state) 134 && ifp->int_auth[0].type != RIP_AUTH_NONE 135 && !(ifp->int_state & IS_NO_RIPV1_OUT)) { 136 if (!warned_auth_out) { 137 msglog("Warning: RIPv1 output via %s" 138 " will be sent without authentication", 139 ifp->int_name); 140 warned_auth_out = 1; 141 } 142 } 143 } 144 145 146 /* Read a list of gateways from /etc/gateways and add them to our tables. 147 * 148 * This file contains a list of "remote" gateways. That is usually 149 * a gateway which we cannot immediately determine if it is present or 150 * not as we can do for those provided by directly connected hardware. 151 * 152 * If a gateway is marked "passive" in the file, then we assume it 153 * does not understand RIP and assume it is always present. Those 154 * not marked passive are treated as if they were directly connected 155 * and assumed to be broken if they do not send us advertisements. 156 * All remote interfaces are added to our list, and those not marked 157 * passive are sent routing updates. 158 * 159 * A passive interface can also be local, hardware interface exempt 160 * from RIP. 161 */ 162 void 163 gwkludge(void) 164 { 165 FILE *fp; 166 char *p, *lptr; 167 char lbuf[200], net_host[5], dname[64+1+64+1]; 168 char gname[GNAME_LEN+1], qual[9]; 169 struct interface *ifp; 170 naddr dst, netmask, gate; 171 int metric, n, lnum; 172 struct stat sb; 173 u_int state; 174 char *type; 175 176 177 fp = fopen(_PATH_GATEWAYS, "r"); 178 if (fp == 0) 179 return; 180 181 if (0 > fstat(fileno(fp), &sb)) { 182 msglog("could not stat() "_PATH_GATEWAYS); 183 (void)fclose(fp); 184 return; 185 } 186 187 for (lnum = 1; ; lnum++) { 188 if (0 == fgets(lbuf, sizeof(lbuf)-1, fp)) 189 break; 190 lptr = lbuf; 191 while (*lptr == ' ') 192 lptr++; 193 p = lptr+strlen(lptr)-1; 194 while (*p == '\n' 195 || (*p == ' ' && (p == lptr+1 || *(p-1) != '\\'))) 196 *p-- = '\0'; 197 if (*lptr == '\0' /* ignore null and comment lines */ 198 || *lptr == '#') 199 continue; 200 201 /* notice newfangled parameter lines 202 */ 203 if (strncasecmp("net", lptr, 3) 204 && strncasecmp("host", lptr, 4)) { 205 p = parse_parms(lptr, 206 (sb.st_uid == 0 207 && !(sb.st_mode&(S_IRWXG|S_IRWXO)))); 208 if (p != 0) 209 msglog("%s in line %d of "_PATH_GATEWAYS, 210 p, lnum); 211 continue; 212 } 213 214 /* {net | host} XX[/M] XX gateway XX metric DD [passive | external]\n */ 215 qual[0] = '\0'; 216 /* the '64' here must be GNAME_LEN */ 217 n = sscanf(lptr, "%4s %129[^ \t] gateway" 218 " %64[^ / \t] metric %u %8s\n", 219 net_host, dname, gname, &metric, qual); 220 if (n != 4 && n != 5) { 221 msglog("bad "_PATH_GATEWAYS" entry \"%s\"; %d values", 222 lptr, n); 223 continue; 224 } 225 if (metric >= HOPCNT_INFINITY) { 226 msglog("bad metric in "_PATH_GATEWAYS" entry \"%s\"", 227 lptr); 228 continue; 229 } 230 if (!strcasecmp(net_host, "host")) { 231 if (!gethost(dname, &dst)) { 232 msglog("bad host \"%s\" in "_PATH_GATEWAYS 233 " entry \"%s\"", dname, lptr); 234 continue; 235 } 236 netmask = HOST_MASK; 237 } else if (!strcasecmp(net_host, "net")) { 238 if (!getnet(dname, &dst, &netmask)) { 239 msglog("bad net \"%s\" in "_PATH_GATEWAYS 240 " entry \"%s\"", dname, lptr); 241 continue; 242 } 243 if (dst == RIP_DEFAULT) { 244 msglog("bad net \"%s\" in "_PATH_GATEWAYS 245 " entry \"%s\"--cannot be default", 246 dname, lptr); 247 continue; 248 } 249 HTONL(dst); /* make network # into IP address */ 250 } else { 251 msglog("bad \"%s\" in "_PATH_GATEWAYS 252 " entry \"%s\"", lptr); 253 continue; 254 } 255 256 if (!gethost(gname, &gate)) { 257 msglog("bad gateway \"%s\" in "_PATH_GATEWAYS 258 " entry \"%s\"", gname, lptr); 259 continue; 260 } 261 262 if (!strcasecmp(qual, type = "passive")) { 263 /* Passive entries are not placed in our tables, 264 * only the kernel's, so we don't copy all of the 265 * external routing information within a net. 266 * Internal machines should use the default 267 * route to a suitable gateway (like us). 268 */ 269 state = IS_REMOTE | IS_PASSIVE; 270 if (metric == 0) 271 metric = 1; 272 273 } else if (!strcasecmp(qual, type = "external")) { 274 /* External entries are handled by other means 275 * such as EGP, and are placed only in the daemon 276 * tables to prevent overriding them with something 277 * else. 278 */ 279 strcpy(qual,"external"); 280 state = IS_REMOTE | IS_PASSIVE | IS_EXTERNAL; 281 if (metric == 0) 282 metric = 1; 283 284 } else if (!strcasecmp(qual, "active") 285 || qual[0] == '\0') { 286 if (metric != 0) { 287 /* Entries that are neither "passive" nor 288 * "external" are "remote" and must behave 289 * like physical interfaces. If they are not 290 * heard from regularly, they are deleted. 291 */ 292 state = IS_REMOTE; 293 type = "remote"; 294 } else { 295 /* "remote" entries with a metric of 0 296 * are aliases for our own interfaces 297 */ 298 state = IS_REMOTE | IS_PASSIVE | IS_ALIAS; 299 type = "alias"; 300 } 301 302 } else { 303 msglog("bad "_PATH_GATEWAYS" entry \"%s\";" 304 " unknown type %s", lptr, qual); 305 continue; 306 } 307 308 if (0 != (state & (IS_PASSIVE | IS_REMOTE))) 309 state |= IS_NO_RDISC; 310 if (state & IS_PASSIVE) 311 state |= IS_NO_RIP; 312 313 ifp = check_dup(gate,dst,netmask,0); 314 if (ifp != 0) { 315 msglog("duplicate "_PATH_GATEWAYS" entry \"%s\"",lptr); 316 continue; 317 } 318 319 ifp = (struct interface *)rtmalloc(sizeof(*ifp), "gwkludge()"); 320 bzero(ifp, sizeof(*ifp)); 321 322 ifp->int_state = state; 323 if (netmask == HOST_MASK) 324 ifp->int_if_flags = IFF_POINTOPOINT | IFF_UP; 325 else 326 ifp->int_if_flags = IFF_UP; 327 ifp->int_act_time = NEVER; 328 ifp->int_addr = gate; 329 ifp->int_dstaddr = dst; 330 ifp->int_mask = netmask; 331 ifp->int_ripv1_mask = netmask; 332 ifp->int_std_mask = std_mask(gate); 333 ifp->int_net = ntohl(dst); 334 ifp->int_std_net = ifp->int_net & ifp->int_std_mask; 335 ifp->int_std_addr = htonl(ifp->int_std_net); 336 ifp->int_metric = metric; 337 if (!(state & IS_EXTERNAL) 338 && ifp->int_mask != ifp->int_std_mask) 339 ifp->int_state |= IS_SUBNET; 340 (void)sprintf(ifp->int_name, "%s(%s)", type, gname); 341 ifp->int_index = -1; 342 343 if_link(ifp); 344 } 345 346 /* After all of the parameter lines have been read, 347 * apply them to any remote interfaces. 348 */ 349 for (ifp = ifnet; 0 != ifp; ifp = ifp->int_next) { 350 get_parms(ifp); 351 352 tot_interfaces++; 353 if (!IS_RIP_OFF(ifp->int_state)) 354 rip_interfaces++; 355 356 trace_if("Add", ifp); 357 } 358 359 (void)fclose(fp); 360 } 361 362 363 /* like strtok(), but honoring backslash and not changing the source string 364 */ 365 static int /* 0=ok, -1=bad */ 366 parse_quote(char **linep, /* look here */ 367 char *delims, /* for these delimiters */ 368 char *delimp, /* 0 or put found delimiter here */ 369 char *buf, /* copy token to here */ 370 int lim) /* at most this many bytes */ 371 { 372 char c, *pc, *p; 373 374 375 pc = *linep; 376 if (*pc == '\0') 377 return -1; 378 379 while (lim != 0) { 380 c = *pc++; 381 if (c == '\0') 382 break; 383 384 if (c == '\\' && pc != '\0') { 385 if ((c = *pc++) == 'n') { 386 c = '\n'; 387 } else if (c == 'r') { 388 c = '\r'; 389 } else if (c == 't') { 390 c = '\t'; 391 } else if (c == 'b') { 392 c = '\b'; 393 } else if (c >= '0' && c <= '7') { 394 c -= '0'; 395 if (*pc >= '0' && *pc <= '7') { 396 c = (c<<3)+(*pc++ - '0'); 397 if (*pc >= '0' && *pc <= '7') 398 c = (c<<3)+(*pc++ - '0'); 399 } 400 } 401 402 } else { 403 for (p = delims; *p != '\0'; ++p) { 404 if (*p == c) 405 goto exit; 406 } 407 } 408 409 *buf++ = c; 410 --lim; 411 } 412 exit: 413 if (lim == 0) 414 return -1; 415 416 *buf = '\0'; /* terminate copy of token */ 417 if (delimp != 0) 418 *delimp = c; /* return delimiter */ 419 *linep = pc-1; /* say where we ended */ 420 return 0; 421 } 422 423 424 /* Parse password timestamp 425 */ 426 static char * 427 parse_ts(time_t *tp, 428 char **valp, 429 char *val0, 430 char *delimp, 431 char *buf, 432 u_int bufsize) 433 { 434 struct tm tm; 435 436 if (0 > parse_quote(valp, "| ,\n\r", delimp, 437 buf,bufsize) 438 || buf[bufsize-1] != '\0' 439 || buf[bufsize-2] != '\0') { 440 sprintf(buf,"bad timestamp %.25s", val0); 441 return buf; 442 } 443 strcat(buf,"\n"); 444 bzero(&tm, sizeof(tm)); 445 if (5 != sscanf(buf, "%u/%u/%u@%u:%u\n", 446 &tm.tm_year, &tm.tm_mon, &tm.tm_mday, 447 &tm.tm_hour, &tm.tm_min)) { 448 sprintf(buf,"bad timestamp %.25s", val0); 449 return buf; 450 } 451 if (tm.tm_year <= 37) 452 tm.tm_year += 100; 453 454 if ((*tp = mktime(&tm)) == -1) { 455 sprintf(buf,"bad timestamp %.25s", val0); 456 return buf; 457 } 458 459 return 0; 460 } 461 462 463 /* Get a password, key ID, and expiration date in the format 464 * passwd|keyID|year/mon/day@hour:min|year/mon/day@hour:min 465 */ 466 static char * /* 0 or error message */ 467 get_passwd(char *tgt, 468 char *val, 469 struct parm *parmp, 470 u_char type, 471 int safe) /* 1=from secure file */ 472 { 473 static char buf[80]; 474 char *val0, *p, delim; 475 struct auth k, *ap, *ap2; 476 int i; 477 u_long l; 478 479 480 if (!safe) 481 return "ignore unsafe password"; 482 483 for (ap = parmp->parm_auth, i = 0; 484 ap->type != RIP_AUTH_NONE; i++, ap++) { 485 if (i >= MAX_AUTH_KEYS) 486 return "too many passwords"; 487 } 488 489 bzero(&k, sizeof(k)); 490 k.type = type; 491 k.end = -1-DAY; 492 493 val0 = val; 494 if (0 > parse_quote(&val, "| ,\n\r", &delim, 495 (char *)k.key, sizeof(k.key))) 496 return tgt; 497 498 if (delim != '|') { 499 if (type == RIP_AUTH_MD5) 500 return "missing Keyid"; 501 } else { 502 val0 = ++val; 503 buf[sizeof(buf)-1] = '\0'; 504 if (0 > parse_quote(&val, "| ,\n\r", &delim, buf,sizeof(buf)) 505 || buf[sizeof(buf)-1] != '\0' 506 || (l = strtoul(buf,&p,0)) > 255 507 || *p != '\0') { 508 sprintf(buf,"bad KeyID \"%.20s\"", val0); 509 return buf; 510 } 511 for (ap2 = parmp->parm_auth; ap2 < ap; ap2++) { 512 if (ap2->keyid == l) { 513 sprintf(buf,"duplicate KeyID \"%.20s\"", val0); 514 return buf; 515 } 516 } 517 k.keyid = (int)l; 518 519 if (delim == '|') { 520 val0 = ++val; 521 if (0 != (p = parse_ts(&k.start,&val,val0,&delim, 522 buf,sizeof(buf)))) 523 return p; 524 if (delim != '|') 525 return "missing second timestamp"; 526 val0 = ++val; 527 if (0 != (p = parse_ts(&k.end,&val,val0,&delim, 528 buf,sizeof(buf)))) 529 return p; 530 if ((u_long)k.start > (u_long)k.end) { 531 sprintf(buf,"out of order timestamp %.30s", 532 val0); 533 return buf; 534 } 535 } 536 } 537 if (delim != '\0') 538 return tgt; 539 540 bcopy(&k, ap, sizeof(*ap)); 541 return 0; 542 } 543 544 545 static char * 546 bad_str(char *estr) 547 { 548 static char buf[100+8]; 549 550 sprintf(buf, "bad \"%.100s\"", estr); 551 return buf; 552 } 553 554 555 /* Parse a set of parameters for an interface. 556 */ 557 char * /* 0 or error message */ 558 parse_parms(char *line, 559 int safe) /* 1=from secure file */ 560 { 561 #define PARS(str) (!strcasecmp(tgt, str)) 562 #define PARSEQ(str) (!strncasecmp(tgt, str"=", sizeof(str))) 563 #define CKF(g,b) {if (0 != (parm.parm_int_state & ((g) & ~(b)))) break; \ 564 parm.parm_int_state |= (b);} 565 struct parm parm; 566 struct intnet *intnetp; 567 struct r1net *r1netp; 568 struct tgate *tg; 569 naddr addr, mask; 570 char delim, *val0, *tgt, *val, *p; 571 char buf[BUFSIZ], buf2[BUFSIZ]; 572 int i; 573 574 575 /* "subnet=x.y.z.u/mask[,metric]" must be alone on the line */ 576 if (!strncasecmp(line, "subnet=", sizeof("subnet=")-1) 577 && *(val = &line[sizeof("subnet=")-1]) != '\0') { 578 if (0 > parse_quote(&val, ",", &delim, buf, sizeof(buf))) 579 return bad_str(line); 580 intnetp = (struct intnet*)rtmalloc(sizeof(*intnetp), 581 "parse_parms subnet"); 582 intnetp->intnet_metric = 1; 583 if (delim == ',') { 584 intnetp->intnet_metric = (int)strtol(val+1,&p,0); 585 if (*p != '\0' 586 || intnetp->intnet_metric <= 0 587 || intnetp->intnet_metric >= HOPCNT_INFINITY) 588 return bad_str(line); 589 } 590 if (!getnet(buf, &intnetp->intnet_addr, &intnetp->intnet_mask) 591 || intnetp->intnet_mask == HOST_MASK 592 || intnetp->intnet_addr == RIP_DEFAULT) { 593 free(intnetp); 594 return bad_str(line); 595 } 596 HTONL(intnetp->intnet_addr); 597 intnetp->intnet_next = intnets; 598 intnets = intnetp; 599 return 0; 600 } 601 602 /* "ripv1_mask=x.y.z.u/mask,mask" must be alone on the line */ 603 if (!strncasecmp(line, "ripv1_mask=", sizeof("ripv1_mask=")-1) 604 && *(val = &line[sizeof("ripv1_mask=")-1]) != '\0') { 605 if (0 > parse_quote(&val, ",", &delim, buf, sizeof(buf)) 606 || delim == '\0') 607 return bad_str(line); 608 if ((i = (int)strtol(val+1, &p, 0)) <= 0 609 || i > 32 || *p != '\0') 610 return bad_str(line); 611 r1netp = (struct r1net *)rtmalloc(sizeof(*r1netp), 612 "parse_parms ripv1_mask"); 613 r1netp->r1net_mask = HOST_MASK << (32-i); 614 if (!getnet(buf, &r1netp->r1net_net, &r1netp->r1net_match) 615 || r1netp->r1net_net == RIP_DEFAULT 616 || r1netp->r1net_mask < r1netp->r1net_match) { 617 free(r1netp); 618 return bad_str(line); 619 } 620 r1netp->r1net_next = r1nets; 621 r1nets = r1netp; 622 return 0; 623 } 624 625 bzero(&parm, sizeof(parm)); 626 627 tgt = "null"; 628 for (;;) { 629 tgt = line + strspn(line, " ,\n\r"); 630 if (*tgt == '\0' || *tgt == '#') 631 break; 632 line = tgt+strcspn(tgt, "= #,\n\r"); 633 delim = *line; 634 if (delim == '=') { 635 val0 = ++line; 636 if (0 > parse_quote(&line, " #,\n\r",&delim, 637 buf,sizeof(buf))) 638 return bad_str(tgt); 639 } 640 if (delim != '\0') { 641 for (;;) { 642 *line = '\0'; 643 if (delim == '#') 644 break; 645 ++line; 646 if (delim != ' ' 647 || (delim = *line) != ' ') 648 break; 649 } 650 } 651 652 if (PARSEQ("if")) { 653 if (parm.parm_name[0] != '\0' 654 || strlen(buf) > IF_NAME_LEN) 655 return bad_str(tgt); 656 strcpy(parm.parm_name, buf); 657 658 } else if (PARSEQ("addr")) { 659 /* This is a bad idea, because the address based 660 * sets of parameters cannot be checked for 661 * consistency with the interface name parameters. 662 * The parm_net stuff is needed to allow several 663 * -F settings. 664 */ 665 if (!getnet(val0, &addr, &mask) 666 || parm.parm_name[0] != '\0') 667 return bad_str(tgt); 668 parm.parm_net = addr; 669 parm.parm_mask = mask; 670 parm.parm_name[0] = '\n'; 671 672 } else if (PARSEQ("passwd")) { 673 /* since cleartext passwords are so weak allow 674 * them anywhere 675 */ 676 tgt = get_passwd(tgt,val0,&parm,RIP_AUTH_PW,1); 677 if (tgt) { 678 *val0 = '\0'; 679 return bad_str(tgt); 680 } 681 682 } else if (PARSEQ("md5_passwd")) { 683 tgt = get_passwd(tgt,val0,&parm,RIP_AUTH_MD5,safe); 684 if (tgt) { 685 *val0 = '\0'; 686 return bad_str(tgt); 687 } 688 689 } else if (PARS("no_ag")) { 690 parm.parm_int_state |= (IS_NO_AG | IS_NO_SUPER_AG); 691 692 } else if (PARS("no_super_ag")) { 693 parm.parm_int_state |= IS_NO_SUPER_AG; 694 695 } else if (PARS("no_ripv1_in")) { 696 parm.parm_int_state |= IS_NO_RIPV1_IN; 697 698 } else if (PARS("no_ripv2_in")) { 699 parm.parm_int_state |= IS_NO_RIPV2_IN; 700 701 } else if (PARS("ripv2_out")) { 702 if (parm.parm_int_state & IS_NO_RIPV2_OUT) 703 return bad_str(tgt); 704 parm.parm_int_state |= IS_NO_RIPV1_OUT; 705 706 } else if (PARS("ripv2")) { 707 if ((parm.parm_int_state & IS_NO_RIPV2_OUT) 708 || (parm.parm_int_state & IS_NO_RIPV2_IN)) 709 return bad_str(tgt); 710 parm.parm_int_state |= (IS_NO_RIPV1_IN 711 | IS_NO_RIPV1_OUT); 712 713 } else if (PARS("no_rip")) { 714 CKF(IS_PM_RDISC, IS_NO_RIP); 715 716 } else if (PARS("no_rip_mcast")) { 717 parm.parm_int_state |= IS_NO_RIP_MCAST; 718 719 } else if (PARS("no_rdisc")) { 720 CKF((GROUP_IS_SOL_OUT|GROUP_IS_ADV_OUT), IS_NO_RDISC); 721 722 } else if (PARS("no_solicit")) { 723 CKF(GROUP_IS_SOL_OUT, IS_NO_SOL_OUT); 724 725 } else if (PARS("send_solicit")) { 726 CKF(GROUP_IS_SOL_OUT, IS_SOL_OUT); 727 728 } else if (PARS("no_rdisc_adv")) { 729 CKF(GROUP_IS_ADV_OUT, IS_NO_ADV_OUT); 730 731 } else if (PARS("rdisc_adv")) { 732 CKF(GROUP_IS_ADV_OUT, IS_ADV_OUT); 733 734 } else if (PARS("bcast_rdisc")) { 735 parm.parm_int_state |= IS_BCAST_RDISC; 736 737 } else if (PARS("passive")) { 738 CKF((GROUP_IS_SOL_OUT|GROUP_IS_ADV_OUT), IS_NO_RDISC); 739 parm.parm_int_state |= IS_NO_RIP; 740 741 } else if (PARSEQ("rdisc_pref")) { 742 if (parm.parm_rdisc_pref != 0 743 || (parm.parm_rdisc_pref = (int)strtol(buf,&p,0), 744 *p != '\0')) 745 return bad_str(tgt); 746 747 } else if (PARS("pm_rdisc")) { 748 if (IS_RIP_OUT_OFF(parm.parm_int_state)) 749 return bad_str(tgt); 750 parm.parm_int_state |= IS_PM_RDISC; 751 752 } else if (PARSEQ("rdisc_interval")) { 753 if (parm.parm_rdisc_int != 0 754 || (parm.parm_rdisc_int = (int)strtoul(buf,&p,0), 755 *p != '\0') 756 || parm.parm_rdisc_int < MinMaxAdvertiseInterval 757 || parm.parm_rdisc_int > MaxMaxAdvertiseInterval) 758 return bad_str(tgt); 759 760 } else if (PARSEQ("fake_default")) { 761 if (parm.parm_d_metric != 0 762 || IS_RIP_OUT_OFF(parm.parm_int_state) 763 || (parm.parm_d_metric = (int)strtoul(buf,&p,0), 764 *p != '\0') 765 || parm.parm_d_metric > HOPCNT_INFINITY-1) 766 return bad_str(tgt); 767 768 } else if (PARSEQ("trust_gateway")) { 769 /* look for trust_gateway=x.y.z|net/mask|...) */ 770 p = buf; 771 if (0 > parse_quote(&p, "|", &delim, 772 buf2, sizeof(buf2)) 773 || !gethost(buf2,&addr)) 774 return bad_str(tgt); 775 tg = (struct tgate *)rtmalloc(sizeof(*tg), 776 "parse_parms" 777 "trust_gateway"); 778 bzero(tg, sizeof(*tg)); 779 tg->tgate_addr = addr; 780 i = 0; 781 /* The default is to trust all routes. */ 782 while (delim == '|') { 783 p++; 784 if (i >= MAX_TGATE_NETS 785 || 0 > parse_quote(&p, "|", &delim, 786 buf2, sizeof(buf2)) 787 || !getnet(buf2, &tg->tgate_nets[i].net, 788 &tg->tgate_nets[i].mask) 789 || tg->tgate_nets[i].net == RIP_DEFAULT 790 || tg->tgate_nets[i].mask == 0) 791 return bad_str(tgt); 792 i++; 793 } 794 tg->tgate_next = tgates; 795 tgates = tg; 796 parm.parm_int_state |= IS_DISTRUST; 797 798 } else if (PARS("redirect_ok")) { 799 parm.parm_int_state |= IS_REDIRECT_OK; 800 801 } else { 802 return bad_str(tgt); /* error */ 803 } 804 } 805 806 return check_parms(&parm); 807 #undef PARS 808 #undef PARSEQ 809 } 810 811 812 /* check for duplicate parameter specifications */ 813 char * /* 0 or error message */ 814 check_parms(struct parm *new) 815 { 816 struct parm *parmp, **parmpp; 817 int i, num_passwds; 818 819 /* set implicit values 820 */ 821 if (new->parm_int_state & IS_NO_ADV_IN) 822 new->parm_int_state |= IS_NO_SOL_OUT; 823 if (new->parm_int_state & IS_NO_SOL_OUT) 824 new->parm_int_state |= IS_NO_ADV_IN; 825 826 for (i = num_passwds = 0; i < MAX_AUTH_KEYS; i++) { 827 if (new->parm_auth[i].type != RIP_AUTH_NONE) 828 num_passwds++; 829 } 830 831 /* compare with existing sets of parameters 832 */ 833 for (parmpp = &parms; 834 (parmp = *parmpp) != 0; 835 parmpp = &parmp->parm_next) { 836 if (strcmp(new->parm_name, parmp->parm_name)) 837 continue; 838 if (!on_net(htonl(parmp->parm_net), 839 new->parm_net, new->parm_mask) 840 && !on_net(htonl(new->parm_net), 841 parmp->parm_net, parmp->parm_mask)) 842 continue; 843 844 for (i = 0; i < MAX_AUTH_KEYS; i++) { 845 if (parmp->parm_auth[i].type != RIP_AUTH_NONE) 846 num_passwds++; 847 } 848 if (num_passwds > MAX_AUTH_KEYS) 849 return "too many conflicting passwords"; 850 851 if ((0 != (new->parm_int_state & GROUP_IS_SOL_OUT) 852 && 0 != (parmp->parm_int_state & GROUP_IS_SOL_OUT) 853 && 0 != ((new->parm_int_state ^ parmp->parm_int_state) 854 && GROUP_IS_SOL_OUT)) 855 || (0 != (new->parm_int_state & GROUP_IS_ADV_OUT) 856 && 0 != (parmp->parm_int_state & GROUP_IS_ADV_OUT) 857 && 0 != ((new->parm_int_state ^ parmp->parm_int_state) 858 && GROUP_IS_ADV_OUT)) 859 || (new->parm_rdisc_pref != 0 860 && parmp->parm_rdisc_pref != 0 861 && new->parm_rdisc_pref != parmp->parm_rdisc_pref) 862 || (new->parm_rdisc_int != 0 863 && parmp->parm_rdisc_int != 0 864 && new->parm_rdisc_int != parmp->parm_rdisc_int)) { 865 return ("conflicting, duplicate router discovery" 866 " parameters"); 867 868 } 869 870 if (new->parm_d_metric != 0 871 && parmp->parm_d_metric != 0 872 && new->parm_d_metric != parmp->parm_d_metric) { 873 return ("conflicting, duplicate poor man's router" 874 " discovery or fake default metric"); 875 } 876 } 877 878 /* link new entry on the so that when the entries are scanned, 879 * they affect the result in the order the operator specified. 880 */ 881 parmp = (struct parm*)rtmalloc(sizeof(*parmp), "check_parms"); 882 bcopy(new, parmp, sizeof(*parmp)); 883 *parmpp = parmp; 884 885 return 0; 886 } 887 888 889 /* get a network number as a name or a number, with an optional "/xx" 890 * netmask. 891 */ 892 int /* 0=bad */ 893 getnet(char *name, 894 naddr *netp, /* network in host byte order */ 895 naddr *maskp) /* masks are always in host order */ 896 { 897 int i; 898 struct netent *np; 899 naddr mask; /* in host byte order */ 900 struct in_addr in; /* a network and so host byte order */ 901 char hname[MAXHOSTNAMELEN+1]; 902 char *mname, *p; 903 904 905 /* Detect and separate "1.2.3.4/24" 906 */ 907 if (0 != (mname = rindex(name,'/'))) { 908 i = (int)(mname - name); 909 if (i > sizeof(hname)-1) /* name too long */ 910 return 0; 911 bcopy(name, hname, i); 912 hname[i] = '\0'; 913 mname++; 914 name = hname; 915 } 916 917 np = getnetbyname(name); 918 if (np != 0) { 919 in.s_addr = (naddr)np->n_net; 920 if (0 == (in.s_addr & 0xff000000)) 921 in.s_addr <<= 8; 922 if (0 == (in.s_addr & 0xff000000)) 923 in.s_addr <<= 8; 924 if (0 == (in.s_addr & 0xff000000)) 925 in.s_addr <<= 8; 926 } else if (inet_aton(name, &in) == 1) { 927 NTOHL(in.s_addr); 928 } else if (!mname && !strcasecmp(name,"default")) { 929 in.s_addr = RIP_DEFAULT; 930 } else { 931 return 0; 932 } 933 934 if (!mname) { 935 /* we cannot use the interfaces here because we have not 936 * looked at them yet. 937 */ 938 mask = std_mask(htonl(in.s_addr)); 939 if ((~mask & in.s_addr) != 0) 940 mask = HOST_MASK; 941 } else { 942 mask = (naddr)strtoul(mname, &p, 0); 943 if (*p != '\0' || mask > 32) 944 return 0; 945 mask = HOST_MASK << (32-mask); 946 } 947 948 /* must have mask of 0 with default */ 949 if (mask != 0 && in.s_addr == RIP_DEFAULT) 950 return 0; 951 /* no host bits allowed in a network number */ 952 if ((~mask & in.s_addr) != 0) 953 return 0; 954 /* require non-zero network number */ 955 if ((mask & in.s_addr) == 0 && in.s_addr != RIP_DEFAULT) 956 return 0; 957 if (in.s_addr>>24 == 0 && in.s_addr != RIP_DEFAULT) 958 return 0; 959 if (in.s_addr>>24 == 0xff) 960 return 0; 961 962 *netp = in.s_addr; 963 *maskp = mask; 964 return 1; 965 } 966 967 968 int /* 0=bad */ 969 gethost(char *name, 970 naddr *addrp) 971 { 972 struct hostent *hp; 973 struct in_addr in; 974 975 976 /* Try for a number first, even in IRIX where gethostbyname() 977 * is smart. This avoids hitting the name server which 978 * might be sick because routing is. 979 */ 980 if (inet_aton(name, &in) == 1) { 981 /* get a good number, but check that it it makes some 982 * sense. 983 */ 984 if (ntohl(in.s_addr)>>24 == 0 985 || ntohl(in.s_addr)>>24 == 0xff) 986 return 0; 987 *addrp = in.s_addr; 988 return 1; 989 } 990 991 hp = gethostbyname(name); 992 if (hp) { 993 bcopy(hp->h_addr, addrp, sizeof(*addrp)); 994 return 1; 995 } 996 997 return 0; 998 } 999
Indexes created Thu Oct 23 22:10:10 GMT 2025