2 * mainconf.c Handle the server's configuration.
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.
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.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 * Copyright 2002,2006-2007 The FreeRADIUS server project
21 * Copyright 2002 Alan DeKok <aland@ox.org>
24 #include <freeradius-devel/ident.h>
27 #include <freeradius-devel/radiusd.h>
28 #include <freeradius-devel/modules.h>
29 #include <freeradius-devel/rad_assert.h>
33 #ifdef HAVE_SYS_RESOURCE_H
34 #include <sys/resource.h>
45 #ifdef HAVE_SYS_PRCTL_H
46 #include <sys/prctl.h>
53 struct main_config_t mainconfig;
56 * Temporary local variables for parsing the configuration
59 static uid_t server_uid;
60 static gid_t server_gid;
61 static const char *uid_name = NULL;
62 static const char *gid_name = NULL;
63 static const char *dictionary_dir = NULL;
64 static int allow_core_dumps = 0;
67 * These are not used anywhere else..
69 static const char *localstatedir = NULL;
70 static const char *prefix = NULL;
71 static char *syslog_facility = NULL;
72 static const FR_NAME_NUMBER str2fac[] = {
83 { "daemon", LOG_DAEMON },
101 { "authpriv", LOG_AUTHPRIV },
107 { "local0", LOG_LOCAL0 },
110 { "local1", LOG_LOCAL1 },
113 { "local2", LOG_LOCAL2 },
116 { "local3", LOG_LOCAL3 },
119 { "local4", LOG_LOCAL4 },
122 { "local5", LOG_LOCAL5 },
125 { "local6", LOG_LOCAL6 },
128 { "local7", LOG_LOCAL7 },
134 * Security configuration for the server.
136 static const CONF_PARSER security_config[] = {
137 { "max_attributes", PW_TYPE_INTEGER, 0, &librad_max_attributes, Stringify(0) },
138 { "reject_delay", PW_TYPE_INTEGER, 0, &mainconfig.reject_delay, Stringify(0) },
139 { "status_server", PW_TYPE_BOOLEAN, 0, &mainconfig.status_server, "no"},
140 { NULL, -1, 0, NULL, NULL }
145 * Logging configuration for the server.
147 static const CONF_PARSER log_config[] = {
148 { "syslog_facility", PW_TYPE_STRING_PTR, 0, &syslog_facility, Stringify(0) },
149 { "stripped_names", PW_TYPE_BOOLEAN, 0, &log_stripped_names,"no" },
151 { "file", PW_TYPE_STRING_PTR, -1, &mainconfig.log_file, "${logdir}/radius.log" },
152 { "auth", PW_TYPE_BOOLEAN, -1, &mainconfig.log_auth, "no" },
153 { "auth_badpass", PW_TYPE_BOOLEAN, 0, &mainconfig.log_auth_badpass, "no" },
154 { "auth_goodpass", PW_TYPE_BOOLEAN, 0, &mainconfig.log_auth_goodpass, "no" },
155 { NULL, -1, 0, NULL, NULL }
160 * A mapping of configuration file names to internal variables
162 static const CONF_PARSER server_config[] = {
164 * FIXME: 'prefix' is the ONLY one which should be
165 * configured at compile time. Hard-coding it here is
166 * bad. It will be cleaned up once we clean up the
167 * hard-coded defines for the locations of the various
170 { "prefix", PW_TYPE_STRING_PTR, 0, &prefix, "/usr/local"},
171 { "localstatedir", PW_TYPE_STRING_PTR, 0, &localstatedir, "${prefix}/var"},
172 { "logdir", PW_TYPE_STRING_PTR, 0, &radlog_dir, "${localstatedir}/log"},
173 { "libdir", PW_TYPE_STRING_PTR, 0, &radlib_dir, "${prefix}/lib"},
174 { "radacctdir", PW_TYPE_STRING_PTR, 0, &radacct_dir, "${logdir}/radacct" },
175 { "hostname_lookups", PW_TYPE_BOOLEAN, 0, &librad_dodns, "no" },
176 { "max_request_time", PW_TYPE_INTEGER, 0, &mainconfig.max_request_time, Stringify(MAX_REQUEST_TIME) },
177 { "cleanup_delay", PW_TYPE_INTEGER, 0, &mainconfig.cleanup_delay, Stringify(CLEANUP_DELAY) },
178 { "max_requests", PW_TYPE_INTEGER, 0, &mainconfig.max_requests, Stringify(MAX_REQUESTS) },
179 #ifdef DELETE_BLOCKED_REQUESTS
180 { "delete_blocked_requests", PW_TYPE_INTEGER, 0, &mainconfig.kill_unresponsive_children, Stringify(FALSE) },
182 { "allow_core_dumps", PW_TYPE_BOOLEAN, 0, &allow_core_dumps, "no" },
183 { "log_stripped_names", PW_TYPE_BOOLEAN, 0, &log_stripped_names,"no" },
185 { "log_file", PW_TYPE_STRING_PTR, -1, &mainconfig.log_file, "${logdir}/radius.log" },
186 { "log_auth", PW_TYPE_BOOLEAN, -1, &mainconfig.log_auth, "no" },
187 { "log_auth_badpass", PW_TYPE_BOOLEAN, 0, &mainconfig.log_auth_badpass, "no" },
188 { "log_auth_goodpass", PW_TYPE_BOOLEAN, 0, &mainconfig.log_auth_goodpass, "no" },
189 { "pidfile", PW_TYPE_STRING_PTR, 0, &mainconfig.pid_file, "${run_dir}/radiusd.pid"},
190 { "user", PW_TYPE_STRING_PTR, 0, &uid_name, NULL},
191 { "group", PW_TYPE_STRING_PTR, 0, &gid_name, NULL},
192 { "checkrad", PW_TYPE_STRING_PTR, 0, &mainconfig.checkrad, "${sbindir}/checkrad" },
194 { "debug_level", PW_TYPE_INTEGER, 0, &mainconfig.debug_level, "0"},
196 { "proxy_requests", PW_TYPE_BOOLEAN, 0, &mainconfig.proxy_requests, "yes" },
197 { "dictionary", PW_TYPE_STRING_PTR, 0, &dictionary_dir, NULL },
198 { "log", PW_TYPE_SUBSECTION, 0, NULL, (const void *) log_config},
199 { "security", PW_TYPE_SUBSECTION, 0, NULL, (const void *) security_config },
200 { NULL, -1, 0, NULL, NULL }
204 #define MAX_ARGV (256)
206 * Xlat for %{config:section.subsection.attribute}
208 static size_t xlat_config(void *instance, REQUEST *request,
209 char *fmt, char *out,
211 RADIUS_ESCAPE_STRING func)
217 request = request; /* -Wunused */
218 instance = instance; /* -Wunused */
221 * FIXME: radius_xlat, with a function that escapes
225 ci = cf_reference_item(request->root->config,
226 request->root->config, fmt);
227 if (!ci || !cf_item_is_pair(ci)) {
232 cp = cf_itemtopair(ci);
235 * Ensure that we only copy what's necessary.
237 * If 'outlen' is too small, then the output is chopped to fit.
239 value = cf_pair_value(cp);
241 if (outlen > strlen(value)) {
242 outlen = strlen(value) + 1;
246 return func(out, outlen, value);
251 * Xlat for %{client:foo}
253 static size_t xlat_client(UNUSED void *instance, REQUEST *request,
254 char *fmt, char *out,
256 UNUSED RADIUS_ESCAPE_STRING func)
258 const char *value = NULL;
261 if (!fmt || !out || (outlen < 1)) return 0;
263 if (!request || !request->client) {
268 cp = cf_pair_find(request->client->cs, fmt);
269 if (!cp || !(value = cf_pair_value(cp))) {
274 strlcpy(out, value, outlen);
280 * Recursively make directories.
282 static int r_mkdir(const char *part)
284 char *ptr, parentdir[500];
287 if (stat(part, &st) == 0)
290 ptr = strrchr(part, FR_DIR_SEP);
295 snprintf(parentdir, (ptr - part)+1, "%s", part);
297 if (r_mkdir(parentdir) != 0)
300 if (mkdir(part, 0770) != 0) {
301 radlog(L_ERR, "mkdir(%s) error: %s\n", part, strerror(errno));
309 * Checks if the log directory is writeable by a particular user.
311 static int radlogdir_iswritable(const char *effectiveuser)
314 struct passwd *pwent;
317 if (!radlog_dir || FR_DIR_IS_RELATIVE(radlog_dir))
320 if (r_mkdir(radlog_dir) != 0)
323 /* FIXME: do we have this function? */
324 if (strstr(radlog_dir, "radius") == NULL)
327 /* we have a logdir that mentions 'radius', so it's probably
328 * safe to chown the immediate directory to be owned by the normal
329 * process owner. we gotta do it before we give up root. -chad
332 if (!effectiveuser) {
337 pwent = getpwnam(effectiveuser);
339 if (pwent == NULL) /* uh oh! */
342 if (chown(radlog_dir, pwent->pw_uid, -1) != 0)
351 * Switch UID and GID to what is specified in the config file
353 static int switch_users(void)
355 int did_setuid = FALSE;
357 #ifdef HAVE_SYS_RESOURCE_H
358 struct rlimit core_limits;
363 if (gid_name != NULL) {
366 gr = getgrnam(gid_name);
368 if (errno == ENOMEM) {
369 radlog(L_ERR, "Cannot switch to Group %s: out of memory", gid_name);
371 radlog(L_ERR, "Cannot switch group; %s doesn't exist", gid_name);
375 server_gid = gr->gr_gid;
376 if (setgid(server_gid) < 0) {
377 radlog(L_ERR, "Failed setting Group to %s: %s",
378 gid_name, strerror(errno));
382 server_gid = getgid();
388 if (uid_name != NULL) {
391 pw = getpwnam(uid_name);
393 if (errno == ENOMEM) {
394 radlog(L_ERR, "Cannot switch to User %s: out of memory", uid_name);
396 radlog(L_ERR, "Cannot switch user; %s doesn't exist", uid_name);
400 server_uid = pw->pw_uid;
401 #ifdef HAVE_INITGROUPS
402 if (initgroups(uid_name, server_gid) < 0) {
403 if (errno != EPERM) {
404 radlog(L_ERR, "Failed setting supplementary groups for User %s: %s", uid_name, strerror(errno));
409 if (setuid(server_uid) < 0) {
410 radlog(L_ERR, "Failed setting User to %s: %s", uid_name, strerror(errno));
415 * Now core dumps are disabled on most secure systems.
421 #ifdef HAVE_SYS_RESOURCE_H
422 /* Get the current maximum for core files. */
423 if (getrlimit(RLIMIT_CORE, &core_limits) < 0) {
424 radlog(L_ERR, "Failed to get current core limit: %s", strerror(errno));
430 * Core dumps are allowed if we're in debug mode, OR
431 * we've allowed them, OR we did a setuid (which turns
434 * Otherwise, disable core dumps for security.
437 if (!(debug_flag || allow_core_dumps || did_setuid)) {
438 #ifdef HAVE_SYS_RESOURCE_H
439 struct rlimit no_core;
441 no_core.rlim_cur = 0;
442 no_core.rlim_max = 0;
444 if (setrlimit(RLIMIT_CORE, &no_core) < 0) {
445 radlog(L_ERR, "Failed disabling core dumps: %s",
452 * Otherwise, re-enable core dumps if we're
453 * running as a daemon, AND core dumps are
454 * allowed, AND we changed UID's.
456 } else if ((debug_flag == 0) && allow_core_dumps && did_setuid) {
458 * Set the dumpable flag.
460 #ifdef HAVE_SYS_PRCTL_H
461 #ifdef PR_SET_DUMPABLE
462 if (prctl(PR_SET_DUMPABLE, 1) < 0) {
463 radlog(L_ERR,"Cannot enable core dumps: prctl(PR_SET_DUMPABLE) failed: '%s'",
470 * Reset the core dump limits again, just to
471 * double check that they haven't changed.
473 #ifdef HAVE_SYS_RESOURCE_H
474 if (setrlimit(RLIMIT_CORE, &core_limits) < 0) {
475 radlog(L_ERR, "Cannot update core dump limit: %s",
481 radlog(L_INFO, "Core dumps are enabled.");
484 * Else we're debugging (so core dumps are enabled)
485 * OR we're not debugging, AND "allow_core_dumps == FALSE",
486 * OR we're not debugging, AND core dumps are allowed,
487 * BUT we didn't call setuid, so we haven't changed the
488 * core dump capabilities inherited from the parent shell.
491 #if defined(HAVE_PWD_H) && defined(HAVE_GRP_H)
493 * We've probably written to the log file already as
494 * root.root, so if we have switched users, we've got to
495 * update the ownership of the file.
497 if ((debug_flag == 0) &&
498 (mainconfig.radlog_dest == RADLOG_FILES) &&
499 (mainconfig.log_file != NULL)) {
500 chown(mainconfig.log_file, server_uid, server_gid);
507 static const FR_NAME_NUMBER str2dest[] = {
508 { "null", RADLOG_NULL },
509 { "files", RADLOG_FILES },
510 { "syslog", RADLOG_SYSLOG },
511 { "stdout", RADLOG_STDOUT },
512 { "stderr", RADLOG_STDERR },
513 { NULL, RADLOG_NUM_DEST }
520 * This function can ONLY be called from the main server process.
522 int read_mainconfig(int reload)
524 const char *p = NULL;
525 static int old_debug_level = -1;
527 CONF_SECTION *cs, *templates;
530 if (stat(radius_dir, &statbuf) < 0) {
531 radlog(L_ERR, "Errors reading %s: %s",
532 radius_dir, strerror(errno));
537 if ((statbuf.st_mode & S_IWOTH) != 0) {
538 radlog(L_ERR, "Configuration directory %s is globally writable. Refusing to start due to insecure configuration.",
545 if (0 && (statbuf.st_mode & S_IROTH) != 0) {
546 radlog(L_ERR, "Configuration directory %s is globally readable. Refusing to start due to insecure configuration.",
553 radlog(L_INFO, "Starting - reading configuration files ...");
555 radlog(L_INFO, "Reloading - reading configuration files...");
558 /* Read the configuration file */
559 snprintf(buffer, sizeof(buffer), "%.200s/%.50s.conf",
560 radius_dir, mainconfig.name);
561 if ((cs = cf_file_read(buffer)) == NULL) {
562 radlog(L_ERR, "Errors reading %s", buffer);
567 * Add templates to each kind of subsection.
569 templates = cf_section_sub_find(cs, "templates");
571 CONF_SECTION *ts, *mycs;
574 * Loop over the templates, adding them to the
575 * sections in the main configuration file.
577 for (ts = cf_subsection_find_next(templates, NULL, NULL);
579 ts = cf_subsection_find_next(templates, ts, NULL)) {
580 const char *name1 = cf_section_name1(ts);
583 * Loop over sections in the main config
584 * file, adding templats.
586 for (mycs = cf_subsection_find_next(cs, NULL, name1);
588 mycs = cf_subsection_find_next(cs, mycs, name1)) {
591 value = cf_section_value_find(mycs, "template");
595 tts = cf_section_sub_find_name2(templates,
599 radlog(L_ERR, "%s[%d]: Section refers to non-existent template \"%s\"",
600 cf_section_filename(mycs), cf_section_lineno(mycs), value);
603 cf_section_template(mycs, tts);
605 cf_section_template(mycs, ts);
612 * Debug flag 1 MAY go to files.
613 * Debug flag 2 ALWAYS goes to stdout
615 * Parse the log_destination before printing anything else.
616 * All messages before this MUST be errors, which log.c
617 * will print to stderr, since log_file is NULL, too.
619 if (debug_flag < 2) {
621 char *radlog_dest = NULL;
623 rcode = cf_item_parse(cs, "log_destination",
624 PW_TYPE_STRING_PTR, &radlog_dest,
626 if (rcode < 0) return -1;
628 mainconfig.radlog_dest = fr_str2int(str2dest, radlog_dest, RADLOG_NUM_DEST);
629 if (mainconfig.radlog_dest == RADLOG_NUM_DEST) {
630 fprintf(stderr, "radiusd: Error: Unknown log_destination %s\n",
633 cf_section_free(&cs);
637 if (mainconfig.radlog_dest == RADLOG_SYSLOG) {
639 * Make sure syslog_facility isn't NULL
642 if (!syslog_facility) {
643 fprintf(stderr, "radiusd: Error: Unknown syslog chosen but no facility spedified\n");
645 cf_section_free(&cs);
648 mainconfig.syslog_facility = fr_str2int(str2fac, syslog_facility, -1);
649 if (mainconfig.syslog_facility < 0) {
650 fprintf(stderr, "radiusd: Error: Unknown syslog_facility %s\n",
653 free(syslog_facility);
654 cf_section_free(&cs);
661 mainconfig.radlog_dest = RADLOG_STDOUT;
662 mainconfig.radlog_fd = STDOUT_FILENO;
665 /* Initialize the dictionary */
667 if (dictionary_dir) p = dictionary_dir;
668 DEBUG2("including dictionary file %s/%s", p, RADIUS_DICTIONARY);
669 if (dict_init(p, RADIUS_DICTIONARY) != 0) {
670 radlog(L_ERR, "Errors reading dictionary: %s",
676 * This allows us to figure out where, relative to
677 * radiusd.conf, the other configuration files exist.
679 cf_section_parse(cs, NULL, server_config);
683 * Merge the old with the new.
688 newcs = cf_section_sub_find(cs, "modules");
689 oldcs = cf_section_sub_find(mainconfig.config, "modules");
690 if (newcs && oldcs) {
691 if (!cf_section_migrate(newcs, oldcs)) {
692 radlog(L_ERR, "Fatal error migrating configuration data");
700 * Free the old configuration items, and replace them
703 * Note that where possible, we do atomic switch-overs,
704 * to ensure that the pointers are always valid.
706 cf_section_free(&mainconfig.config);
707 mainconfig.config = cs;
709 clients_parse_section(cs);
711 DEBUG2("%s: #### Loading Realms and Home Servers ####", mainconfig.name);
713 if (!realms_init(cs)) {
718 * Register the %{config:section.subsection} xlat function.
720 xlat_register("config", xlat_config, NULL);
721 xlat_register("client", xlat_client, NULL);
724 * Reload: change debug flag if it's changed in the
725 * configuration file.
728 if (mainconfig.debug_level != old_debug_level) {
729 debug_flag = mainconfig.debug_level;
732 } else if (debug_flag == 0) {
735 * Starting the server, WITHOUT "-x" on the
736 * command-line: use whatever's in the config
739 debug_flag = mainconfig.debug_level;
741 librad_debug = debug_flag;
742 old_debug_level = mainconfig.debug_level;
745 * Go update our behaviour, based on the configuration
750 * The first time around, ensure that we can write to the
753 if (!reload && !debug_flag) {
755 * We need root to do mkdir() and chown(), so we
756 * do this before giving up root.
758 radlogdir_iswritable(uid_name);
762 * We should really switch users earlier in the process.
764 if (!switch_users()) exit(1);
767 * Sanity check the configuration for internal
770 if (mainconfig.reject_delay > mainconfig.cleanup_delay) {
771 mainconfig.reject_delay = mainconfig.cleanup_delay;
773 if (mainconfig.reject_delay < 0) mainconfig.reject_delay = 0;
775 /* Reload the modules. */
776 if (setup_modules(reload, mainconfig.config) < 0) {
777 radlog(L_ERR, "Errors initializing modules");
785 * Free the configuration. Called only when the server is exiting.
787 int free_mainconfig(void)
790 * Clean up the configuration data
793 cf_section_free(&mainconfig.config);
795 listen_free(&mainconfig.listen);