1 /* 2 * $Id: config.c,v 1.1 2004/11/14 07:26:26 paulus Exp $ 3 * 4 * Copyright (C) 1995,1996,1997 Lars Fenneberg 5 * 6 * Copyright 1992 Livingston Enterprises, Inc. 7 * 8 * Copyright 1992,1993, 1994,1995 The Regents of the University of Michigan 9 * and Merit Network, Inc. All Rights Reserved 10 * 11 * See the file COPYRIGHT for the respective terms and conditions. 12 * If the file is missing contact me at lf (at) elemental.net 13 * and I'll send you a copy. 14 * 15 */ 16 17 #include <includes.h> 18 #include <radiusclient.h> 19 #include <options.h> 20 21 static int test_config(char *); 22 23 /* 24 * Function: find_option 25 * 26 * Purpose: find an option in the option list 27 * 28 * Returns: pointer to option on success, NULL otherwise 29 */ 30 31 static OPTION *find_option(char *optname, unsigned int type) 32 { 33 int i; 34 35 /* there're so few options that a binary search seems not necessary */ 36 for (i = 0; i < num_options; i++) { 37 if (!strcmp(config_options[i].name, optname) && 38 (config_options[i].type & type)) 39 return &config_options[i]; 40 } 41 42 return NULL; 43 } 44 45 /* 46 * Function: set_option_... 47 * 48 * Purpose: set a specific option doing type conversions 49 * 50 * Returns: 0 on success, -1 on failure 51 */ 52 53 static int set_option_str(char *filename, int line, OPTION *option, char *p) 54 { 55 if (p) 56 option->val = (void *) strdup(p); 57 else 58 option->val = NULL; 59 60 return 0; 61 } 62 63 static int set_option_int(char *filename, int line, OPTION *option, char *p) 64 { 65 int *iptr; 66 67 if (p == NULL) { 68 error("%s: line %d: bogus option value", filename, line); 69 return (-1); 70 } 71 72 if ((iptr = (int *) malloc(sizeof(iptr))) == NULL) { 73 novm("read_config"); 74 return (-1); 75 } 76 77 *iptr = atoi(p); 78 option->val = (void *) iptr; 79 80 return 0; 81 } 82 83 static int set_option_srv(char *filename, int line, OPTION *option, char *p) 84 { 85 SERVER *serv; 86 char *q; 87 struct servent *svp; 88 int i; 89 90 if (p == NULL) { 91 error("%s: line %d: bogus option value", filename, line); 92 return (-1); 93 } 94 95 serv = (SERVER *) option->val; 96 97 for (i = 0; i < serv->max; i++) { 98 free(serv->name[i]); 99 } 100 serv->max = 0; 101 102 while ((p = strtok(p, ", \t")) != NULL) { 103 104 if ((q = strchr(p,':')) != NULL) { 105 *q = '\0'; 106 q++; 107 serv->port[serv->max] = atoi(q); 108 } else { 109 if (!strcmp(option->name,"authserver")) 110 if ((svp = getservbyname ("radius", "udp")) == NULL) 111 serv->port[serv->max] = PW_AUTH_UDP_PORT; 112 else 113 serv->port[serv->max] = ntohs ((unsigned int) svp->s_port); 114 else if (!strcmp(option->name, "acctserver")) 115 if ((svp = getservbyname ("radacct", "udp")) == NULL) 116 serv->port[serv->max] = PW_ACCT_UDP_PORT; 117 else 118 serv->port[serv->max] = ntohs ((unsigned int) svp->s_port); 119 else { 120 error("%s: line %d: no default port for %s", filename, line, option->name); 121 return (-1); 122 } 123 } 124 125 serv->name[serv->max++] = strdup(p); 126 127 p = NULL; 128 } 129 130 return 0; 131 } 132 133 static int set_option_auo(char *filename, int line, OPTION *option, char *p) 134 { 135 int *iptr; 136 137 if (p == NULL) { 138 warn("%s: line %d: bogus option value", filename, line); 139 return (-1); 140 } 141 142 if ((iptr = (int *) malloc(sizeof(iptr))) == NULL) { 143 novm("read_config"); 144 return (-1); 145 } 146 147 *iptr = 0; 148 p = strtok(p, ", \t"); 149 150 if (!strncmp(p, "local", 5)) 151 *iptr = AUTH_LOCAL_FST; 152 else if (!strncmp(p, "radius", 6)) 153 *iptr = AUTH_RADIUS_FST; 154 else { 155 error("%s: auth_order: unknown keyword: %s", filename, p); 156 return (-1); 157 } 158 159 p = strtok(NULL, ", \t"); 160 161 if (p && (*p != '\0')) { 162 if ((*iptr & AUTH_RADIUS_FST) && !strcmp(p, "local")) 163 *iptr = (*iptr) | AUTH_LOCAL_SND; 164 else if ((*iptr & AUTH_LOCAL_FST) && !strcmp(p, "radius")) 165 *iptr = (*iptr) | AUTH_RADIUS_SND; 166 else { 167 error("%s: auth_order: unknown or unexpected keyword: %s", filename, p); 168 return (-1); 169 } 170 } 171 172 option->val = (void *) iptr; 173 174 return 0; 175 } 176 177 178 /* 179 * Function: rc_read_config 180 * 181 * Purpose: read the global config file 182 * 183 * Returns: 0 on success, -1 when failure 184 */ 185 186 int rc_read_config(char *filename) 187 { 188 FILE *configfd; 189 char buffer[512], *p; 190 OPTION *option; 191 int line, pos; 192 193 if ((configfd = fopen(filename,"r")) == NULL) 194 { 195 error("rc_read_config: can't open %s: %m", filename); 196 return (-1); 197 } 198 199 line = 0; 200 while ((fgets(buffer, sizeof(buffer), configfd) != NULL)) 201 { 202 line++; 203 p = buffer; 204 205 if ((*p == '\n') || (*p == '#') || (*p == '\0')) 206 continue; 207 208 p[strlen(p)-1] = '\0'; 209 210 211 if ((pos = strcspn(p, "\t ")) == 0) { 212 error("%s: line %d: bogus format: %s", filename, line, p); 213 return (-1); 214 } 215 216 p[pos] = '\0'; 217 218 if ((option = find_option(p, OT_ANY)) == NULL) { 219 error("%s: line %d: unrecognized keyword: %s", filename, line, p); 220 return (-1); 221 } 222 223 if (option->status != ST_UNDEF) { 224 error("%s: line %d: duplicate option line: %s", filename, line, p); 225 return (-1); 226 } 227 228 p += pos+1; 229 while (isspace(*p)) 230 p++; 231 232 switch (option->type) { 233 case OT_STR: 234 if (set_option_str(filename, line, option, p) < 0) 235 return (-1); 236 break; 237 case OT_INT: 238 if (set_option_int(filename, line, option, p) < 0) 239 return (-1); 240 break; 241 case OT_SRV: 242 if (set_option_srv(filename, line, option, p) < 0) 243 return (-1); 244 break; 245 case OT_AUO: 246 if (set_option_auo(filename, line, option, p) < 0) 247 return (-1); 248 break; 249 default: 250 fatal("rc_read_config: impossible case branch!"); 251 abort(); 252 } 253 } 254 fclose(configfd); 255 256 return test_config(filename); 257 } 258 259 /* 260 * Function: rc_conf_str, rc_conf_int, rc_conf_src 261 * 262 * Purpose: get the value of a config option 263 * 264 * Returns: config option value 265 */ 266 267 char *rc_conf_str(char *optname) 268 { 269 OPTION *option; 270 271 option = find_option(optname, OT_STR); 272 273 if (option == NULL) 274 fatal("rc_conf_str: unkown config option requested: %s", optname); 275 return (char *)option->val; 276 } 277 278 int rc_conf_int(char *optname) 279 { 280 OPTION *option; 281 282 option = find_option(optname, OT_INT|OT_AUO); 283 284 if (option == NULL) 285 fatal("rc_conf_int: unkown config option requested: %s", optname); 286 return *((int *)option->val); 287 } 288 289 SERVER *rc_conf_srv(char *optname) 290 { 291 OPTION *option; 292 293 option = find_option(optname, OT_SRV); 294 295 if (option == NULL) 296 fatal("rc_conf_srv: unkown config option requested: %s", optname); 297 return (SERVER *)option->val; 298 } 299 300 /* 301 * Function: test_config 302 * 303 * Purpose: test the configuration the user supplied 304 * 305 * Returns: 0 on success, -1 when failure 306 */ 307 308 static int test_config(char *filename) 309 { 310 #if 0 311 struct stat st; 312 char *file; 313 #endif 314 315 if (!(rc_conf_srv("authserver")->max)) 316 { 317 error("%s: no authserver specified", filename); 318 return (-1); 319 } 320 if (!(rc_conf_srv("acctserver")->max)) 321 { 322 error("%s: no acctserver specified", filename); 323 return (-1); 324 } 325 if (!rc_conf_str("servers")) 326 { 327 error("%s: no servers file specified", filename); 328 return (-1); 329 } 330 if (!rc_conf_str("dictionary")) 331 { 332 error("%s: no dictionary specified", filename); 333 return (-1); 334 } 335 336 if (rc_conf_int("radius_timeout") <= 0) 337 { 338 error("%s: radius_timeout <= 0 is illegal", filename); 339 return (-1); 340 } 341 if (rc_conf_int("radius_retries") <= 0) 342 { 343 error("%s: radius_retries <= 0 is illegal", filename); 344 return (-1); 345 } 346 347 #if 0 348 file = rc_conf_str("login_local"); 349 if (stat(file, &st) == 0) 350 { 351 if (!S_ISREG(st.st_mode)) { 352 error("%s: not a regular file: %s", filename, file); 353 return (-1); 354 } 355 } else { 356 error("%s: file not found: %s", filename, file); 357 return (-1); 358 } 359 file = rc_conf_str("login_radius"); 360 if (stat(file, &st) == 0) 361 { 362 if (!S_ISREG(st.st_mode)) { 363 error("%s: not a regular file: %s", filename, file); 364 return (-1); 365 } 366 } else { 367 error("%s: file not found: %s", filename, file); 368 return (-1); 369 } 370 #endif 371 372 if (rc_conf_int("login_tries") <= 0) 373 { 374 error("%s: login_tries <= 0 is illegal", filename); 375 return (-1); 376 } 377 if (rc_conf_str("seqfile") == NULL) 378 { 379 error("%s: seqfile not specified", filename); 380 return (-1); 381 } 382 if (rc_conf_int("login_timeout") <= 0) 383 { 384 error("%s: login_timeout <= 0 is illegal", filename); 385 return (-1); 386 } 387 if (rc_conf_str("mapfile") == NULL) 388 { 389 error("%s: mapfile not specified", filename); 390 return (-1); 391 } 392 if (rc_conf_str("nologin") == NULL) 393 { 394 error("%s: nologin not specified", filename); 395 return (-1); 396 } 397 398 return 0; 399 } 400 401 /* 402 * Function: rc_find_match 403 * 404 * Purpose: see if ip_addr is one of the ip addresses of hostname 405 * 406 * Returns: 0 on success, -1 when failure 407 * 408 */ 409 410 static int find_match (UINT4 *ip_addr, char *hostname) 411 { 412 UINT4 addr; 413 char **paddr; 414 struct hostent *hp; 415 416 if (rc_good_ipaddr (hostname) == 0) 417 { 418 if (*ip_addr == ntohl(inet_addr (hostname))) 419 { 420 return (0); 421 } 422 } 423 else 424 { 425 if ((hp = gethostbyname (hostname)) == (struct hostent *) NULL) 426 { 427 return (-1); 428 } 429 for (paddr = hp->h_addr_list; *paddr; paddr++) 430 { 431 addr = ** (UINT4 **) paddr; 432 if (ntohl(addr) == *ip_addr) 433 { 434 return (0); 435 } 436 } 437 } 438 return (-1); 439 } 440 441 /* 442 * Function: rc_find_server 443 * 444 * Purpose: search a server in the servers file 445 * 446 * Returns: 0 on success, -1 on failure 447 * 448 */ 449 450 int rc_find_server (char *server_name, UINT4 *ip_addr, char *secret) 451 { 452 UINT4 myipaddr = 0; 453 int len; 454 int result; 455 FILE *clientfd; 456 char *h; 457 char *s; 458 char *host2; 459 char buffer[128]; 460 char hostnm[AUTH_ID_LEN + 1]; 461 462 /* Get the IP address of the authentication server */ 463 if ((*ip_addr = rc_get_ipaddr (server_name)) == (UINT4) 0) 464 return (-1); 465 466 if ((clientfd = fopen (rc_conf_str("servers"), "r")) == (FILE *) NULL) 467 { 468 error("rc_find_server: couldn't open file: %m: %s", rc_conf_str("servers")); 469 return (-1); 470 } 471 472 myipaddr = rc_own_ipaddress(); 473 474 result = 0; 475 while (fgets (buffer, sizeof (buffer), clientfd) != (char *) NULL) 476 { 477 if (*buffer == '#') 478 continue; 479 480 if ((h = strtok (buffer, " \t\n")) == NULL) /* first hostname */ 481 continue; 482 483 memset (hostnm, '\0', AUTH_ID_LEN); 484 len = strlen (h); 485 if (len > AUTH_ID_LEN) 486 { 487 len = AUTH_ID_LEN; 488 } 489 strncpy (hostnm, h, (size_t) len); 490 hostnm[AUTH_ID_LEN] = '\0'; 491 492 if ((s = strtok (NULL, " \t\n")) == NULL) /* and secret field */ 493 continue; 494 495 memset (secret, '\0', MAX_SECRET_LENGTH); 496 len = strlen (s); 497 if (len > MAX_SECRET_LENGTH) 498 { 499 len = MAX_SECRET_LENGTH; 500 } 501 strncpy (secret, s, (size_t) len); 502 secret[MAX_SECRET_LENGTH] = '\0'; 503 504 if (!strchr (hostnm, '/')) /* If single name form */ 505 { 506 if (find_match (ip_addr, hostnm) == 0) 507 { 508 result++; 509 break; 510 } 511 } 512 else /* <name1>/<name2> "paired" form */ 513 { 514 strtok (hostnm, "/"); 515 if (find_match (&myipaddr, hostnm) == 0) 516 { /* If we're the 1st name, target is 2nd */ 517 host2 = strtok (NULL, " "); 518 if (find_match (ip_addr, host2) == 0) 519 { 520 result++; 521 break; 522 } 523 } 524 else /* If we were 2nd name, target is 1st name */ 525 { 526 if (find_match (ip_addr, hostnm) == 0) 527 { 528 result++; 529 break; 530 } 531 } 532 } 533 } 534 fclose (clientfd); 535 if (result == 0) 536 { 537 memset (buffer, '\0', sizeof (buffer)); 538 memset (secret, '\0', sizeof (secret)); 539 error("rc_find_server: couldn't find RADIUS server %s in %s", 540 server_name, rc_conf_str("servers")); 541 return (-1); 542 } 543 return 0; 544 } 545
