src/main/mainconfig.c

   1 /*
   2  * mainconf.c   Handle the server's configuration.
   3  *
   4  * Version:     $Id$
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * Copyright 2002  The FreeRADIUS server project
  21  * Copyright 2002  Alan DeKok <aland@ox.org>
  22  */
  23
  24 #include "autoconf.h"
  25 #include "libradius.h"
  26
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #ifdef HAVE_NETINET_IN_H
  31 #include <netinet/in.h>
  32 #endif
  33
  34 #include "radiusd.h"
  35 #include "rad_assert.h"
  36 #include "conffile.h"
  37 #include "token.h"
  38
  39 #include <sys/resource.h>
  40 #include <unistd.h>
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43 #include <grp.h>
  44 #include <pwd.h>
  45
  46
  47 struct main_config_t mainconfig;
  48
  49 /*
  50  *  Local variables for stuff.
  51  */
  52 static uid_t server_uid;
  53 static gid_t server_gid;
  54
  55 /*
  56  *      These are not used anywhere else..
  57  */
  58 static const char *localstatedir = NULL;
  59 static const char *prefix = NULL;
  60 static const char *data_dir = NULL;
  61
  62 /*
  63  *  Map the proxy server configuration parameters to variables.
  64  */
  65 static CONF_PARSER proxy_config[] = {
  66         { "retry_delay",  PW_TYPE_INTEGER, 0, &mainconfig.proxy_retry_delay, Stringify(RETRY_DELAY) },
  67         { "retry_count",  PW_TYPE_INTEGER, 0, &mainconfig.proxy_retry_count, Stringify(RETRY_COUNT) },
  68         { "synchronous",  PW_TYPE_BOOLEAN, 0, &mainconfig.proxy_synchronous, "no" },
  69         { "default_fallback", PW_TYPE_BOOLEAN, 0, &mainconfig.proxy_fallback, "no" },
  70         { "dead_time",    PW_TYPE_INTEGER, 0, &mainconfig.proxy_dead_time, Stringify(DEAD_TIME) },
  71         { "post_proxy_authorize", PW_TYPE_BOOLEAN, 0, &mainconfig.post_proxy_authorize, "yes" },
  72         { NULL, -1, 0, NULL, NULL }
  73 };
  74
  75 /*
  76  *  Security configuration for the server.
  77  */
  78 static CONF_PARSER security_config[] = {
  79         { "max_attributes",  PW_TYPE_INTEGER, 0, &librad_max_attributes, Stringify(0) },
  80         { "reject_delay",  PW_TYPE_INTEGER, 0, &mainconfig.reject_delay, Stringify(0) },
  81         { "status_server", PW_TYPE_BOOLEAN, 0, &mainconfig.status_server, "no"},
  82         { NULL, -1, 0, NULL, NULL }
  83 };
  84
  85 /*
  86  *  A mapping of configuration file names to internal variables
  87  */
  88 static CONF_PARSER server_config[] = {
  89         /*
  90          *      FIXME: 'prefix' is the ONLY one which should be
  91          *      configured at compile time.  Hard-coding it here is
  92          *      bad.  It will be cleaned up once we clean up the
  93          *      hard-coded defines for the locations of the various
  94          *      files.
  95          */
  96         { "prefix",             PW_TYPE_STRING_PTR, 0, &prefix,            "/usr/local"},
  97         { "localstatedir",      PW_TYPE_STRING_PTR, 0, &localstatedir,     "${prefix}/var"},
  98         { "logdir",             PW_TYPE_STRING_PTR, 0, &radlog_dir,        "${localstatedir}/log"},
  99         { "libdir",             PW_TYPE_STRING_PTR, 0, &radlib_dir,        "${prefix}/lib"},
 100         { "radacctdir",         PW_TYPE_STRING_PTR, 0, &radacct_dir,       "${logdir}/radacct" },
 101         { "datadir",             PW_TYPE_STRING_PTR, 0, &data_dir,          "${prefix}/share/freeradius"},
 102         { "hostname_lookups",   PW_TYPE_BOOLEAN,    0, &librad_dodns,      "no" },
 103 #if WITH_SNMP
 104         { "snmp",               PW_TYPE_BOOLEAN,    0, &mainconfig.do_snmp,      "no" },
 105 #endif
 106         { "max_request_time", PW_TYPE_INTEGER, 0, &mainconfig.max_request_time, Stringify(MAX_REQUEST_TIME) },
 107         { "cleanup_delay", PW_TYPE_INTEGER, 0, &mainconfig.cleanup_delay, Stringify(CLEANUP_DELAY) },
 108         { "max_requests", PW_TYPE_INTEGER, 0, &mainconfig.max_requests, Stringify(MAX_REQUESTS) },
 109         { "delete_blocked_requests", PW_TYPE_INTEGER, 0, &mainconfig.kill_unresponsive_children, Stringify(FALSE) },
 110         { "port", PW_TYPE_INTEGER, 0, &auth_port, Stringify(PW_AUTH_UDP_PORT) },
 111         { "allow_core_dumps", PW_TYPE_BOOLEAN, 0, &mainconfig.allow_core_dumps, "no" },
 112         { "log_stripped_names", PW_TYPE_BOOLEAN, 0, &log_stripped_names,"no" },
 113         { "log_file", PW_TYPE_STRING_PTR, -1, &mainconfig.log_file, "${logdir}/radius.log" },
 114         { "log_auth", PW_TYPE_BOOLEAN, -1, &mainconfig.log_auth, "no" },
 115         { "log_auth_badpass", PW_TYPE_BOOLEAN, 0, &mainconfig.log_auth_badpass, "no" },
 116         { "log_auth_goodpass", PW_TYPE_BOOLEAN, 0, &mainconfig.log_auth_goodpass, "no" },
 117         { "pidfile", PW_TYPE_STRING_PTR, 0, &mainconfig.pid_file, "${run_dir}/radiusd.pid"},
 118         { "bind_address", PW_TYPE_IPADDR, 0, &mainconfig.myip, "*" },
 119         { "user", PW_TYPE_STRING_PTR, 0, &mainconfig.uid_name, NULL},
 120         { "group", PW_TYPE_STRING_PTR, 0, &mainconfig.gid_name, NULL},
 121         { "usercollide", PW_TYPE_BOOLEAN, 0, &mainconfig.do_usercollide,  "no" },
 122         { "lower_user", PW_TYPE_STRING_PTR, 0, &mainconfig.do_lower_user, "no" },
 123         { "lower_pass", PW_TYPE_STRING_PTR, 0, &mainconfig.do_lower_pass, "no" },
 124         { "nospace_user", PW_TYPE_STRING_PTR, 0, &mainconfig.do_nospace_user, "no" },
 125         { "nospace_pass", PW_TYPE_STRING_PTR, 0, &mainconfig.do_nospace_pass, "no" },
 126         { "checkrad", PW_TYPE_STRING_PTR, 0, &mainconfig.checkrad, "${sbindir}/checkrad" },
 127         { "proxy_requests", PW_TYPE_BOOLEAN, 0, &mainconfig.proxy_requests, "yes" },
 128         { "proxy", PW_TYPE_SUBSECTION, 0, proxy_config, NULL },
 129         { "security", PW_TYPE_SUBSECTION, 0, security_config, NULL },
 130         { "debug_level", PW_TYPE_INTEGER, 0, &mainconfig.debug_level, "0"},
 131         { NULL, -1, 0, NULL, NULL }
 132 };
 133
 134 /*
 135  *      Xlat for %{config:section.subsection.attribute}
 136  */
 137 static int xlat_config(void *instance, REQUEST *request,
 138                        char *fmt, char *out, int outlen,
 139                        RADIUS_ESCAPE_STRING func)
 140 {
 141         CONF_SECTION *cs;
 142         CONF_PAIR *cp;
 143         char buffer[1024];
 144         char *p, *value;
 145         const char *start = fmt;
 146
 147         cp = NULL;
 148         cs = NULL;
 149
 150         while (cp == NULL) {
 151                 /*
 152                  *      Find the next section.
 153                  */
 154                 for (p = buffer; (*fmt != 0) && (*fmt != '.'); p++, fmt++) {
 155                         *p = *fmt;
 156                 }
 157                 *p = '\0';
 158
 159                 /*
 160                  *  The character is a '.', find a section (as the user
 161                  *  has given us a subsection to find)
 162                  */
 163                 if (*fmt == '.') {
 164                         CONF_SECTION *next;
 165
 166                         fmt++;  /* skip the period */
 167
 168                         if (cs == NULL) {
 169                           next = cf_section_find(buffer);
 170                         } else {
 171                           next = cf_subsection_find_next(cs, NULL, buffer);
 172                         }
 173                         if (next == NULL) {
 174                                 radlog(L_ERR, "config: No such section %s in format string %s", buffer, start);
 175                                 return 0;
 176                         }
 177                         cs = next;
 178
 179                 } else {        /* no period, must be a conf-part */
 180                         cp = cf_pair_find(cs, buffer);
 181
 182                         if (cp == NULL) {
 183                                 radlog(L_ERR, "config: No such section %s in format string %s", buffer, start);
 184                                 return 0;
 185                         }
 186                 }
 187         } /* until cp is non-NULL */
 188
 189         /*
 190          *  Ensure that we only copy what's necessary.
 191          *
 192          *  If 'outlen' is too small, then the output is chopped to fit.
 193          */
 194         value = cf_pair_value(cp);
 195         if (value) {
 196                 if (outlen > strlen(value)) {
 197                         outlen = strlen(value) + 1;
 198                 }
 199         }
 200
 201         return func(out, outlen, value);
 202 }
 203
 204
 205 /*
 206  *      Recursively make directories.
 207  */
 208 static int r_mkdir(const char *part) {
 209         char *ptr, parentdir[500];
 210         struct stat st;
 211
 212         if (stat(part, &st) == 0)
 213                 return(0);
 214
 215         ptr = strrchr(part, '/');
 216
 217         if (ptr == part)
 218                 return(0);
 219
 220         snprintf(parentdir, (ptr - part)+1, "%s", part);
 221
 222         if (r_mkdir(parentdir) != 0)
 223                 return(1);
 224
 225         if (mkdir(part, 0770) != 0) {
 226                 fprintf(stderr, "mkdir(%s) error: %s\n", part, strerror(errno));
 227                 return(1);
 228         }
 229
 230         fprintf(stderr, "Created directory %s\n", part);
 231
 232         return(0);
 233 }
 234
 235 /*
 236  *      Checks if the log directory is writeable by a particular user.
 237  */
 238 static int radlogdir_iswritable(const char *effectiveuser) {
 239         struct passwd *pwent;
 240
 241         if (radlog_dir[0] != '/')
 242                 return(0);
 243
 244         if (r_mkdir(radlog_dir) != 0)
 245                 return(1);
 246
 247         /* FIXME: do we have this function? */
 248         if (strstr(radlog_dir, "radius") == NULL)
 249                 return(0);
 250
 251         /* we have a logdir that mentions 'radius', so it's probably
 252          * safe to chown the immediate directory to be owned by the normal
 253          * process owner. we gotta do it before we give up root.  -chad
 254          */
 255
 256         if (!effectiveuser) {
 257                 return 1;
 258         }
 259
 260         pwent = getpwnam(effectiveuser);
 261
 262         if (pwent == NULL) /* uh oh! */
 263                 return(1);
 264
 265         if (chown(radlog_dir, pwent->pw_uid, -1) != 0)
 266                 return(1);
 267
 268         return(0);
 269 }
 270
 271
 272 static int switch_users(void) {
 273
 274         /*
 275          *  Switch UID and GID to what is specified in the config file
 276          */
 277
 278         /*  Set GID.  */
 279         if (mainconfig.gid_name != NULL) {
 280                 struct group *gr;
 281
 282                 gr = getgrnam(mainconfig.gid_name);
 283                 if (gr == NULL) {
 284                         if (errno == ENOMEM) {
 285                                 radlog(L_ERR|L_CONS, "Cannot switch to Group %s: out of memory", mainconfig.gid_name);
 286                         } else {
 287                                 radlog(L_ERR|L_CONS, "Cannot switch group; %s doesn't exist", mainconfig.gid_name);
 288                         }
 289                         exit(1);
 290                 }
 291                 server_gid = gr->gr_gid;
 292                 if (setgid(server_gid) < 0) {
 293                         radlog(L_ERR|L_CONS, "Failed setting Group to %s: %s", mainconfig.gid_name, strerror(errno));
 294                         exit(1);
 295                 }
 296         }
 297
 298         /*  Set UID.  */
 299         if (mainconfig.uid_name != NULL) {
 300                 struct passwd *pw;
 301
 302                 pw = getpwnam(mainconfig.uid_name);
 303                 if (pw == NULL) {
 304                         if (errno == ENOMEM) {
 305                                 radlog(L_ERR|L_CONS, "Cannot switch to User %s: out of memory", mainconfig.uid_name);
 306                         } else {
 307                                 radlog(L_ERR|L_CONS, "Cannot switch user; %s doesn't exist", mainconfig.uid_name);
 308                         }
 309                         exit(1);
 310                 }
 311                 server_uid = pw->pw_uid;
 312                 if (setuid(server_uid) < 0) {
 313                         radlog(L_ERR|L_CONS, "Failed setting User to %s: %s", mainconfig.uid_name, strerror(errno));
 314                         exit(1);
 315                 }
 316         }
 317         return(0);
 318 }
 319
 320
 321 /*
 322  * Create the linked list of realms from the new configuration type
 323  * This way we don't have to change to much in the other source-files
 324  */
 325 static int generate_realms(const char *filename)
 326 {
 327         CONF_SECTION *cs;
 328         REALM *my_realms = NULL;
 329         REALM *c, **tail;
 330         char *s, *t, *authhost, *accthost;
 331         char *name2;
 332
 333         tail = &my_realms;
 334         for (cs = cf_subsection_find_next(mainconfig.config, NULL, "realm"); cs != NULL;
 335                         cs = cf_subsection_find_next(mainconfig.config, cs, "realm")) {
 336                 name2 = cf_section_name2(cs);
 337                 if (!name2) {
 338                         radlog(L_CONS|L_ERR, "%s[%d]: Missing realm name", filename, cf_section_lineno(cs));
 339                         return -1;
 340                 }
 341                 /*
 342                  * We've found a realm, allocate space for it
 343                  */
 344                 c = rad_malloc(sizeof(REALM));
 345                 memset(c, 0, sizeof(REALM));
 346
 347                 c->secret[0] = '\0';
 348
 349                 /*
 350                  *      No authhost means LOCAL.
 351                  */
 352                 if ((authhost = cf_section_value_find(cs, "authhost")) == NULL) {
 353                         c->ipaddr = htonl(INADDR_NONE);
 354                         c->auth_port = auth_port;
 355                 } else {
 356                         if ((s = strchr(authhost, ':')) != NULL) {
 357                                 *s++ = 0;
 358                                 c->auth_port = atoi(s);
 359                         } else {
 360                                 c->auth_port = auth_port;
 361                         }
 362                         if (strcmp(authhost, "LOCAL") == 0) {
 363                                 /*
 364                                  *      Local realms don't have an IP address,
 365                                  *      secret, or port.
 366                                  */
 367                                 c->ipaddr = htonl(INADDR_NONE);
 368                                 c->auth_port = auth_port;
 369                         } else {
 370                                 c->ipaddr = ip_getaddr(authhost);
 371                         }
 372                 }
 373
 374                 /*
 375                  *      No accthost means LOCAL
 376                  */
 377                 if ((accthost = cf_section_value_find(cs, "accthost")) == NULL) {
 378                         c->acct_ipaddr = htonl(INADDR_NONE);
 379                         c->acct_port = acct_port;
 380                 } else {
 381                         if ((s = strchr(accthost, ':')) != NULL) {
 382                                 *s++ = 0;
 383                                 c->acct_port = atoi(s);
 384                         } else {
 385                                 c->acct_port = acct_port;
 386                         }
 387                         if (strcmp(accthost, "LOCAL") == 0) {
 388                                 /*
 389                                  *      Local realms don't have an IP address,
 390                                  *      secret, or port.
 391                                  */
 392                                 c->acct_ipaddr = htonl(INADDR_NONE);
 393                                 c->acct_port = acct_port;
 394                         } else {
 395                                 c->acct_ipaddr = ip_getaddr(accthost);
 396                         }
 397                 }
 398
 399                 /*
 400                  * Double check length, just to be sure!
 401                  */
 402                 if (strlen(authhost) >= sizeof(c->server)) {
 403                         radlog(L_ERR, "%s[%d]: Server name of length %d is greater that allowed: %d",
 404                                         filename, cf_section_lineno(cs),
 405                                         strlen(authhost), sizeof(c->server) - 1);
 406                         return -1;
 407                 }
 408                 if (strlen(name2) >= sizeof(c->realm)) {
 409                         radlog(L_ERR, "%s[%d]: Realm name of length %d is greater than allowed %d",
 410                                         filename, cf_section_lineno(cs),
 411                                         strlen(name2), sizeof(c->server) - 1);
 412                         return -1;
 413                 }
 414
 415                 strcpy(c->realm, name2);
 416                 strcpy(c->server, authhost);
 417
 418                 /*
 419                  *      If one or the other of authentication/accounting
 420                  *      servers is set to LOCALHOST, then don't require
 421                  *      a shared secret.
 422                  */
 423                 if ((c->ipaddr != htonl(INADDR_NONE)) ||
 424                     (c->acct_ipaddr != htonl(INADDR_NONE))) {
 425                         if ((s = cf_section_value_find(cs, "secret")) == NULL ) {
 426                                 radlog(L_ERR, "%s[%d]: No shared secret supplied for realm: %s",
 427                                        filename, cf_section_lineno(cs), name2);
 428                                 return -1;
 429                         }
 430
 431                         if (strlen(s) >= sizeof(c->secret)) {
 432                                 radlog(L_ERR, "%s[%d]: Secret of length %d is greater than the allowed maximum of %d.",
 433                                        filename, cf_section_lineno(cs),
 434                                        strlen(s), sizeof(c->secret) - 1);
 435                                 return -1;
 436                         }
 437                         strNcpy((char *)c->secret, s, sizeof(c->secret));
 438                 }
 439
 440                 c->striprealm = 1;
 441
 442                 if ((cf_section_value_find(cs, "nostrip")) != NULL)
 443                         c->striprealm = 0;
 444                 if ((cf_section_value_find(cs, "noacct")) != NULL)
 445                         c->acct_port = 0;
 446                 if ((cf_section_value_find(cs, "trusted")) != NULL)
 447                         c->trusted = 1;
 448                 if ((cf_section_value_find(cs, "notrealm")) != NULL)
 449                         c->notrealm = 1;
 450                 if ((cf_section_value_find(cs, "notsuffix")) != NULL)
 451                         c->notrealm = 1;
 452                 if ((t = cf_section_value_find(cs,"ldflag")) != NULL) {
 453                         static const LRAD_NAME_NUMBER ldflags[] = {
 454                                 { "fail_over",   0 },
 455                                 { "round_robin", 1 },
 456                                 { NULL, 0 }
 457                         };
 458
 459                         c->ldflag = lrad_str2int(ldflags, t, -1);
 460                         if (c->ldflag == -1) {
 461                                 radlog(L_ERR, "%s[%d]: Unknown value \"%s\" for ldflag",
 462                                        filename, cf_section_lineno(cs),
 463                                        t);
 464                                 return -1;
 465                         }
 466
 467                 } else {
 468                         c->ldflag = 0; /* non, make it fail-over */
 469                 }
 470                 c->active = TRUE;
 471                 c->acct_active = TRUE;
 472
 473                 c->next = NULL;
 474                 *tail = c;
 475                 tail = &c->next;
 476         }
 477
 478         /*
 479          *      And make these realms preferred over the ones
 480          *      in the 'realms' file.
 481          */
 482         *tail = mainconfig.realms;
 483         mainconfig.realms = my_realms;
 484
 485         /*
 486          *  Ensure that all of the flags agree for the realms.
 487          *
 488          *      Yeah, it's O(N^2), but it's only once, and the
 489          *      maximum number of realms is small.
 490          */
 491         for(c = mainconfig.realms; c != NULL; c = c->next) {
 492                 REALM *this;
 493
 494                 /*
 495                  *      Check that we cannot load balance to LOCAL
 496                  *      realms, as that doesn't make any sense.
 497                  */
 498                 if ((c->ldflag == 1) &&
 499                     ((c->ipaddr == htonl(INADDR_NONE)) ||
 500                      (c->acct_ipaddr == htonl(INADDR_NONE)))) {
 501                         radlog(L_ERR | L_CONS, "ERROR: Realm %s cannot be load balanced to LOCAL",
 502                                c->realm);
 503                         exit(1);
 504                 }
 505
 506                 /*
 507                  *      Compare this realm to all others, to ensure
 508                  *      that the configuration is consistent.
 509                  */
 510                 for (this = c->next; this != NULL; this = this->next) {
 511                         if (strcasecmp(c->realm, this->realm) != 0) {
 512                                 continue;
 513                         }
 514
 515                         /*
 516                          *      Same realm: Different load balancing
 517                          *      flag: die.
 518                          */
 519                         if (c->ldflag != this->ldflag) {
 520                                 radlog(L_ERR | L_CONS, "ERROR: Inconsistent value in realm %s for load balancing 'ldflag' attribute",
 521                                        c->realm);
 522                                 exit(1);
 523                         }
 524                 }
 525         }
 526
 527         return 0;
 528 }
 529
 530
 531 /*
 532  *      Create the linked list of realms from the new configuration
 533  *      type.  This way we don't have to change too much in the other
 534  *      source-files.
 535  */
 536 static int generate_clients(const char *filename)
 537 {
 538         CONF_SECTION    *cs;
 539         RADCLIENT       *c;
 540         char            *hostnm, *secret, *shortnm, *netmask;
 541         char            *nastype, *login, *password;
 542         char            *name2;
 543
 544         for (cs = cf_subsection_find_next(mainconfig.config, NULL, "client");
 545              cs != NULL;
 546              cs = cf_subsection_find_next(mainconfig.config, cs, "client")) {
 547
 548                 name2 = cf_section_name2(cs);
 549                 if (!name2) {
 550                         radlog(L_CONS|L_ERR, "%s[%d]: Missing client name",
 551                                filename, cf_section_lineno(cs));
 552                         return -1;
 553                 }
 554                 /*
 555                  * Check the lengths, we don't want any core dumps
 556                  */
 557                 hostnm = name2;
 558
 559                 if((secret = cf_section_value_find(cs, "secret")) == NULL) {
 560                         radlog(L_ERR, "%s[%d]: Missing secret for client: %s",
 561                                 filename, cf_section_lineno(cs), name2);
 562                         return -1;
 563                 }
 564
 565                 if((shortnm = cf_section_value_find(cs, "shortname")) == NULL) {
 566                         radlog(L_ERR, "%s[%d]: Missing shortname for client: %s",
 567                                 filename, cf_section_lineno(cs), name2);
 568                         return -1;
 569                 }
 570
 571                 netmask = strchr(hostnm, '/');
 572
 573                 if (strlen(secret) >= sizeof(c->secret)) {
 574                         radlog(L_ERR, "%s[%d]: Secret of length %d is greater than the allowed maximum of %d.",
 575                                 filename, cf_section_lineno(cs),
 576                                 strlen(secret), sizeof(c->secret) - 1);
 577                         return -1;
 578                 }
 579                 if (strlen(shortnm) > sizeof(c->shortname)) {
 580                         radlog(L_ERR, "%s[%d]: Client short name of length %d is greater than the allowed maximum of %d.",
 581                                         filename, cf_section_lineno(cs),
 582                                         strlen(shortnm), sizeof(c->shortname) - 1);
 583                         return -1;
 584                 }
 585
 586                 if((nastype = cf_section_value_find(cs, "nastype")) != NULL) {
 587                         if(strlen(nastype) >= sizeof(c->nastype)) {
 588                                radlog(L_ERR, "%s[%d]: nastype of length %d longer than the allowed maximum of %d",
 589                                       filename, cf_section_lineno(cs),
 590                                       strlen(nastype), sizeof(c->nastype) - 1);
 591                                return -1;
 592                         }
 593                 }
 594
 595                 if((login = cf_section_value_find(cs, "login")) != NULL) {
 596                         if(strlen(login) >= sizeof(c->login)) {
 597                                radlog(L_ERR, "%s[%d]: login of length %d longer than the allowed maximum of %d",
 598                                       filename, cf_section_lineno(cs),
 599                                       strlen(login), sizeof(c->login) - 1);
 600                                return -1;
 601                         }
 602                 }
 603
 604                 if((password = cf_section_value_find(cs, "password")) != NULL) {
 605                         if(strlen(password) >= sizeof(c->password)) {
 606                                radlog(L_ERR, "%s[%d]: password of length %d longer than the allowed maximum of %d",
 607                                       filename, cf_section_lineno(cs),
 608                                       strlen(password), sizeof(c->password) - 1);
 609                                return -1;
 610                         }
 611                 }
 612
 613                 /*
 614                  * The size is fine.. Let's create the buffer
 615                  */
 616                 c = rad_malloc(sizeof(RADCLIENT));
 617                 memset(c, 0, sizeof(RADCLIENT));
 618
 619                 /*
 620                  *      Look for netmasks.
 621                  */
 622                 c->netmask = ~0;
 623                 if (netmask) {
 624                         int i, mask_length;
 625
 626                         mask_length = atoi(netmask + 1);
 627                         if ((mask_length <= 0) || (mask_length > 32)) {
 628                                 radlog(L_ERR, "%s[%d]: Invalid value '%s' for IP network mask.",
 629                                                 filename, cf_section_lineno(cs), netmask + 1);
 630                                 return -1;
 631                         }
 632
 633                         c->netmask = (1 << 31);
 634                         for (i = 1; i < mask_length; i++) {
 635                                 c->netmask |= (c->netmask >> 1);
 636                         }
 637
 638                         *netmask = '\0';
 639                         c->netmask = htonl(c->netmask);
 640                 }
 641
 642                 c->ipaddr = ip_getaddr(hostnm);
 643                 if (c->ipaddr == INADDR_NONE) {
 644                         radlog(L_CONS|L_ERR, "%s[%d]: Failed to look up hostname %s",
 645                                         filename, cf_section_lineno(cs), hostnm);
 646                         return -1;
 647                 }
 648
 649                 /*
 650                  *      Update the client name again...
 651                  */
 652                 if (netmask) {
 653                         *netmask = '/';
 654                         c->ipaddr &= c->netmask;
 655                         strcpy(c->longname, hostnm);
 656                 } else {
 657                         ip_hostname(c->longname, sizeof(c->longname),
 658                                         c->ipaddr);
 659                 }
 660
 661                 strcpy((char *)c->secret, secret);
 662                 strcpy(c->shortname, shortnm);
 663                 if(nastype != NULL)
 664                         strcpy(c->nastype, nastype);
 665                 if(login != NULL)
 666                         strcpy(c->login, login);
 667                 if(password != NULL)
 668                         strcpy(c->password, password);
 669
 670                 c->next =mainconfig. clients;
 671                 mainconfig.clients = c;
 672         }
 673
 674         return 0;
 675 }
 676
 677 #ifndef RADIUS_CONFIG
 678 #define RADIUS_CONFIG "radiusd.conf"
 679 #endif
 680
 681 CONF_SECTION *read_radius_conf_file(void)
 682 {
 683         char buffer[256];
 684         CONF_SECTION *cs;
 685
 686         /* Lets go look for the new configuration files */
 687         snprintf(buffer, sizeof(buffer), "%.200s/%.50s", radius_dir, RADIUS_CONFIG);
 688         if ((cs = conf_read(NULL, 0, buffer, NULL)) == NULL) {
 689                 return NULL;
 690         }
 691
 692         /*
 693          *      This allows us to figure out where, relative to
 694          *      radiusd.conf, the other configuration files exist.
 695          */
 696         cf_section_parse(cs, NULL, server_config);
 697
 698         /* Initialize the dictionary */
 699         DEBUG2("read_config_files:  reading dictionary");
 700         if (dict_init(data_dir, RADIUS_DICTIONARY) != 0) {
 701                 radlog(L_ERR|L_CONS, "Errors reading dictionary: %s",
 702                                 librad_errstr);
 703                 cf_section_free(&cs);
 704                 return NULL;
 705         }
 706
 707         return cs;
 708 }
 709
 710
 711 /*
 712  *      Read config files.
 713  *
 714  *      This function can ONLY be called from the main server process.
 715  */
 716 int read_mainconfig(int reload)
 717 {
 718         struct rlimit core_limits;
 719         static int old_debug_level = -1;
 720         char buffer[1024];
 721         CONF_SECTION *cs, *oldcs;
 722
 723         if (!reload) {
 724                 radlog(L_INFO, "Starting - reading configuration files ...");
 725         } else {
 726                 radlog(L_INFO, "Reloading configuration files.");
 727         }
 728
 729         /* First read radiusd.conf */
 730         DEBUG2("reread_config:  reading radiusd.conf");
 731         if ((cs = read_radius_conf_file()) == NULL) {
 732                 if (debug_flag ||
 733                     (radlog_dir == NULL)) {
 734                         radlog(L_ERR|L_CONS, "Errors reading radiusd.conf");
 735                 } else {
 736                         radlog(L_ERR|L_CONS, "Errors reading %s/radiusd.conf: For more information, please read the tail end of %s", radlog_dir, mainconfig.log_file);
 737                 }
 738                 return -1;
 739         }
 740
 741         /*
 742          *      Free the old configuration items, and replace them
 743          *      with the new ones.
 744          *
 745          *      Note that where possible, we do atomic switch-overs,
 746          *      to ensure that the pointers are always valid.
 747          */
 748         oldcs = mainconfig.config;
 749         mainconfig.config = cs;
 750         cf_section_free(&oldcs);
 751
 752         /* old-style naslist file */
 753         snprintf(buffer, sizeof(buffer), "%.200s/%.50s", radius_dir, RADIUS_NASLIST);
 754         DEBUG2("read_config_files:  reading naslist");
 755         if (read_naslist_file(buffer) < 0) {
 756                 radlog(L_ERR|L_CONS, "Errors reading naslist");
 757                 return -1;
 758         }
 759         /* old-style clients file */
 760         snprintf(buffer, sizeof(buffer), "%.200s/%.50s", radius_dir, RADIUS_CLIENTS);
 761         DEBUG2("read_config_files:  reading clients");
 762         if (read_clients_file(buffer) < 0) {
 763                 radlog(L_ERR|L_CONS, "Errors reading clients");
 764                 return -1;
 765         }
 766
 767         /*
 768          *      Add to that, the *new* list of clients.
 769          */
 770         snprintf(buffer, sizeof(buffer), "%.200s/%.50s", radius_dir, RADIUS_CONFIG);
 771         if (generate_clients(buffer) < 0) {
 772                 return -1;
 773         }
 774
 775         /* old-style realms file */
 776         snprintf(buffer, sizeof(buffer), "%.200s/%.50s", radius_dir, RADIUS_REALMS);
 777         DEBUG2("read_config_files:  reading realms");
 778         if (read_realms_file(buffer) < 0) {
 779                 radlog(L_ERR|L_CONS, "Errors reading realms");
 780                 return -1;
 781         }
 782
 783         /*
 784          *      If there isn't any realms it isn't fatal..
 785          */
 786         snprintf(buffer, sizeof(buffer), "%.200s/%.50s", radius_dir, RADIUS_CONFIG);
 787         if (generate_realms(buffer) < 0) {
 788                 return -1;
 789         }
 790
 791         /*
 792          *  Register the %{config:section.subsection} xlat function.
 793          */
 794         xlat_register("config", xlat_config, NULL);
 795
 796         /*
 797          *      Set the libraries debugging flag to whatever the main
 798          *      flag is.  Note that on a SIGHUP, to turn the debugging
 799          *      off, we do other magic.
 800          *
 801          *      Increase the debug level, if the configuration file
 802          *      says to, OR, if we're decreasing the debug from what it
 803          *      was before, allow that, too.
 804          */
 805         if ((mainconfig.debug_level > debug_flag) ||
 806             (mainconfig.debug_level <= old_debug_level)) {
 807           debug_flag = mainconfig.debug_level;
 808         }
 809         librad_debug = debug_flag;
 810         old_debug_level = mainconfig.debug_level;
 811
 812         /*
 813          *  Go update our behaviour, based on the configuration
 814          *  changes.
 815          */
 816
 817         /*  Get the current maximum for core files.  */
 818         if (getrlimit(RLIMIT_CORE, &core_limits) < 0) {
 819                 radlog(L_ERR|L_CONS, "Failed to get current core limit:  %s", strerror(errno));
 820                 exit(1);
 821         }
 822
 823         if (mainconfig.allow_core_dumps) {
 824                 if (setrlimit(RLIMIT_CORE, &core_limits) < 0) {
 825                         radlog(L_ERR|L_CONS, "Cannot update core dump limit: %s",
 826                                         strerror(errno));
 827                         exit(1);
 828
 829                         /*
 830                          *  If we're running as a daemon, and core
 831                          *  dumps are enabled, log that information.
 832                          */
 833                 } else if ((core_limits.rlim_cur != 0) && !debug_flag)
 834                         radlog(L_INFO|L_CONS, "Core dumps are enabled.");
 835
 836         } else if (!debug_flag) {
 837                 /*
 838                  *  Not debugging.  Set the core size to zero, to
 839                  *  prevent security breaches.  i.e. People
 840                  *  reading passwords from the 'core' file.
 841                  */
 842                 struct rlimit limits;
 843
 844                 limits.rlim_cur = 0;
 845                 limits.rlim_max = core_limits.rlim_max;
 846
 847                 if (setrlimit(RLIMIT_CORE, &limits) < 0) {
 848                         radlog(L_ERR|L_CONS, "Cannot disable core dumps: %s",
 849                                         strerror(errno));
 850                         exit(1);
 851                 }
 852         }
 853
 854         /*
 855          *      The first time around, ensure that we can write to the
 856          *      log directory.
 857          */
 858         if (!reload) {
 859                 /*
 860                  *      We need root to do mkdir() and chown(), so we
 861                  *      do this before giving up root.
 862                  */
 863                 radlogdir_iswritable(mainconfig.uid_name);
 864         }
 865         switch_users();
 866
 867         /*
 868          *      Sanity check the configuration for internal
 869          *      consistency.
 870          */
 871         if (mainconfig.reject_delay > mainconfig.cleanup_delay) {
 872                 mainconfig.reject_delay = mainconfig.cleanup_delay;
 873         }
 874
 875         return 0;
 876 }
 877
 878 /*
 879  *      Free the configuration.
 880  */
 881 int free_mainconfig(void)
 882 {
 883         /*
 884          *      Clean up the configuration data
 885          *      structures.
 886          */
 887         cf_section_free(&mainconfig.config);
 888         realm_free(mainconfig.realms);
 889         clients_free(mainconfig.clients);
 890
 891         return 0;
 892 }