2 * radiusd.c Main loop of the radius server.
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 2000-2012 The FreeRADIUS server project
21 * Copyright 1999,2000 Miquel van Smoorenburg <miquels@cistron.nl>
22 * Copyright 2000 Alan DeKok <aland@ox.org>
23 * Copyright 2000 Alan Curry <pacman-radius@cqc.com>
24 * Copyright 2000 Jeff Carneal <jeff@apex.net>
25 * Copyright 2000 Chad Miller <cmiller@surfsouth.com>
30 #include <freeradius-devel/radiusd.h>
31 #include <freeradius-devel/modules.h>
32 #include <freeradius-devel/rad_assert.h>
43 #ifdef HAVE_SYS_WAIT_H
44 # include <sys/wait.h>
47 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
50 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
56 char const *progname = NULL;
57 char const *radius_dir = NULL;
58 char const *radacct_dir = NULL;
59 char const *radlog_dir = NULL;
60 char const *radlib_dir = NULL;
61 bool log_stripped_names;
62 log_debug_t debug_flag = 0;
63 bool check_config = false;
64 bool memory_report = false;
66 char const *radiusd_version = "FreeRADIUS Version " RADIUSD_VERSION_STRING
67 #ifdef RADIUSD_VERSION_COMMIT
68 " (git #" STRINGIFY(RADIUSD_VERSION_COMMIT) ")"
70 ", for host " HOSTINFO ", built on " __DATE__ " at " __TIME__;
75 * Configuration items.
81 static void usage(int);
83 static void sig_fatal (int);
85 static void sig_hup (int);
88 #ifdef WITH_VERIFY_PTR
89 static void die_horribly(char const *reason)
91 ERROR("talloc abort: %s\n", reason);
99 int main(int argc, char *argv[])
101 int rcode = EXIT_SUCCESS;
104 bool spawn_flag = true;
105 bool dont_fork = false;
106 bool write_pid = false;
108 int from_child[2] = {-1, -1};
112 set_auth_parameters(argc,argv);
115 if ((progname = strrchr(argv[0], FR_DIR_SEP)) == NULL)
123 if (WSAStartup(MAKEWORD(2, 0), &wsaData)) {
124 fprintf(stderr, "%s: Unable to initialize socket library.\n", progname);
132 radius_dir = talloc_strdup(NULL, RADIUS_DIR);
135 * Ensure that the configuration is initialized.
137 memset(&mainconfig, 0, sizeof(mainconfig));
138 mainconfig.myip.af = AF_UNSPEC;
139 mainconfig.port = -1;
140 mainconfig.name = "radiusd";
143 * Don't put output anywhere until we get told a little
146 default_log.dest = L_DST_NULL;
148 mainconfig.log_file = NULL;
150 /* Process the options. */
151 while ((argval = getopt(argc, argv, "Cd:D:fhi:l:mMn:p:PstvxX")) != EOF) {
162 rad_const_free(radius_dir);
164 radius_dir = talloc_strdup(NULL, optarg);
168 mainconfig.dictionary_dir = talloc_strdup(NULL, optarg);
180 if (strcmp(optarg, "stdout") == 0) {
183 mainconfig.log_file = strdup(optarg);
184 default_log.dest = L_DST_FILES;
185 default_log.fd = open(mainconfig.log_file,
186 O_WRONLY | O_APPEND | O_CREAT, 0640);
187 if (default_log.fd < 0) {
188 fprintf(stderr, "radiusd: Failed to open log file %s: %s\n", mainconfig.log_file, fr_syserror(errno));
191 fr_log_fp = fdopen(default_log.fd, "a");
195 if (ip_hton(optarg, AF_UNSPEC, &mainconfig.myip) < 0) {
196 fprintf(stderr, "radiusd: Invalid IP Address or hostname \"%s\"\n", optarg);
203 mainconfig.name = optarg;
207 mainconfig.debug_memory = 1;
212 mainconfig.debug_memory = 1;
216 mainconfig.port = atoi(optarg);
217 if ((mainconfig.port <= 0) ||
218 (mainconfig.port >= 65536)) {
219 fprintf(stderr, "radiusd: Invalid port number %s\n", optarg);
226 /* Force the PID to be written, even in -f mode */
230 case 's': /* Single process mode */
235 case 't': /* no child threads */
240 /* Don't print timestamps */
243 default_log.dest = L_DST_STDOUT;
244 default_log.fd = STDOUT_FILENO;
252 mainconfig.log_auth = true;
253 mainconfig.log_auth_badpass = true;
254 mainconfig.log_auth_goodpass = true;
257 default_log.dest = L_DST_STDOUT;
258 default_log.fd = STDOUT_FILENO;
272 talloc_enable_null_tracking();
273 #ifdef WITH_VERIFY_PTR
274 talloc_set_abort_fn(die_horribly);
277 talloc_set_log_fn(log_talloc);
280 * Mismatch between the binary and the libraries it depends on
282 if (fr_check_lib_magic(RADIUSD_MAGIC_NUMBER) < 0) {
283 fr_perror("radiusd");
287 if (rad_check_lib_magic(RADIUSD_MAGIC_NUMBER) < 0) {
292 * Mismatch between build time OpenSSL and linked SSL,
293 * better to die here than segfault later.
295 #ifdef HAVE_OPENSSL_CRYPTO_H
296 if (ssl_check_version() < 0) {
301 * Initialising OpenSSL once, here, is safer than having individual
307 if (flag && (flag != 0x03)) {
308 fprintf(stderr, "radiusd: The options -i and -p cannot be used individually.\n");
316 /* Read the configuration files, BEFORE doing anything else. */
317 if (read_mainconfig(0) < 0) {
323 * Disconnect from session
325 if (dont_fork == false) {
328 if (pipe(from_child) != 0) {
329 ERROR("Couldn't open pipe for child status: %s", fr_syserror(errno));
335 ERROR("Couldn't fork: %s", fr_syserror(errno));
340 * The parent exits, so the child can run in the background.
342 * As the child can still encounter an error during initialisation
343 * we do a blocking read on a pipe between it and the parent.
345 * Just before entering the event loop the child will send a success
346 * or failure message to the parent, via the pipe.
352 /* So the pipe is correctly widowed if the child exits */
353 close(from_child[1]);
356 * The child writes a 0x01 byte on
357 * success, and closes the pipe on error.
359 if ((read(from_child[0], &ret, 1) < 0)) {
363 /* For cleanliness... */
364 close(from_child[0]);
366 /* Don't turn children into zombies */
368 waitpid(pid, &stat_loc, WNOHANG);
375 /* so the pipe is correctly widowed if the parent exits?! */
376 close(from_child[0]);
384 * Ensure that we're using the CORRECT pid after forking,
385 * NOT the one we started with.
387 radius_pid = getpid();
390 * If we're running as a daemon, close the default file
391 * descriptors, AFTER forking.
396 devnull = open("/dev/null", O_RDWR);
398 ERROR("Failed opening /dev/null: %s\n",
402 dup2(devnull, STDIN_FILENO);
403 if (default_log.dest == L_DST_STDOUT) {
405 default_log.fd = STDOUT_FILENO;
407 dup2(devnull, STDOUT_FILENO);
409 if (default_log.dest == L_DST_STDERR) {
411 default_log.fd = STDERR_FILENO;
413 dup2(devnull, STDERR_FILENO);
418 setlinebuf(stdout); /* unbuffered output */
422 * Now we have logging check that the OpenSSL
426 * Initialize the event pool, including threads.
428 radius_event_init(mainconfig.config, spawn_flag);
431 * Now that we've set everything up, we can install the signal
432 * handlers. Before this, if we get any signal, we don't know
433 * what to do, so we might as well do the default, and die.
436 signal(SIGPIPE, SIG_IGN);
439 if ((fr_set_signal(SIGHUP, sig_hup) < 0) ||
440 (fr_set_signal(SIGTERM, sig_fatal) < 0)) {
441 ERROR("%s", fr_strerror());
446 * If we're debugging, then a CTRL-C will cause the
447 * server to die immediately. Use SIGTERM to shut down
448 * the server cleanly in that case.
450 if ((mainconfig.debug_memory == 1) || (debug_flag == 0)) {
451 if ((fr_set_signal(SIGINT, sig_fatal) < 0)
453 || (fr_set_signal(SIGQUIT, sig_fatal) < 0)
456 ERROR("%s", fr_strerror());
462 * Everything seems to have loaded OK, exit gracefully.
465 DEBUG("Configuration appears to be OK.");
468 if (mainconfig.debug_memory) {
476 radius_stats_init(0);
480 * Write out the PID anyway if were in foreground mode.
482 if (!dont_fork) write_pid = true;
485 * Only write the PID file if we're running as a daemon.
487 * And write it AFTER we've forked, so that we write the
493 fp = fopen(mainconfig.pid_file, "w");
496 * FIXME: What about following symlinks,
497 * and having it over-write a normal file?
499 fprintf(fp, "%d\n", (int) radius_pid);
502 ERROR("Failed creating PID file %s: %s\n",
503 mainconfig.pid_file, fr_syserror(errno));
508 exec_trigger(NULL, NULL, "server.start", false);
511 * Inform the parent (who should still be waiting) that
512 * the rest of initialisation went OK, and that it should
513 * exit with a 0 status. If we don't get this far, then
514 * we just close the pipe on exit, and the parent gets a
518 if (write(from_child[1], "\001", 1) < 0) {
519 WARN("Failed informing parent of successful start: %s",
522 close(from_child[1]);
526 * Process requests until HUP or exit.
528 while ((status = radius_event_process()) == 0x80) {
530 radius_stats_init(1);
535 ERROR("Exiting due to internal error: %s", fr_strerror());
536 rcode = EXIT_FAILURE;
538 INFO("Exiting normally.");
541 exec_trigger(NULL, NULL, "server.stop", false);
544 * Ignore the TERM signal: we're
547 signal(SIGTERM, SIG_IGN);
550 * Send a TERM signal to all
551 * associated processes
552 * (including us, which gets
556 if (spawn_flag) kill(-radius_pid, SIGTERM);
560 * We're exiting, so we can delete the PID
561 * file. (If it doesn't exist, we can ignore
562 * the error returned by unlink)
564 if (dont_fork == false) {
565 unlink(mainconfig.pid_file);
572 * Detach any modules.
576 xlat_free(); /* modules may have xlat's */
579 * Free the configuration items.
583 rad_const_free(radius_dir);
590 INFO("Allocated memory at time of report:");
591 log_talloc_report(NULL);
599 * Display the syntax for starting this program.
601 static void NEVER_RETURNS usage(int status)
603 FILE *output = status?stderr:stdout;
605 fprintf(output, "Usage: %s [-d db_dir] [-l log_dir] [-i address] [-n name] [-fsvXx]\n", progname);
606 fprintf(output, "Options:\n");
607 fprintf(output, " -C Check configuration and exit.\n");
608 fprintf(output, " -d raddb_dir Configuration files are in \"raddbdir/*\".\n");
609 fprintf(output, " -f Run as a foreground process, not a daemon.\n");
610 fprintf(output, " -h Print this help message.\n");
611 fprintf(output, " -i ipaddr Listen on ipaddr ONLY.\n");
612 fprintf(output, " -l log_file Logging output will be written to this file.\n");
613 fprintf(output, " -m On SIGINT or SIGQUIT exit cleanly instead of immediately.\n");
614 fprintf(output, " -n name Read raddb/name.conf instead of raddb/radiusd.conf.\n");
615 fprintf(output, " -p port Listen on port ONLY.\n");
616 fprintf(output, " -P Always write out PID, even with -f.\n");
617 fprintf(output, " -s Do not spawn child processes to handle requests.\n");
618 fprintf(output, " -t Disable threads.\n");
619 fprintf(output, " -v Print server version information.\n");
620 fprintf(output, " -X Turn on full debugging.\n");
621 fprintf(output, " -x Turn on additional debugging. (-xx gives more debugging).\n");
627 * We got a fatal signal.
629 static void sig_fatal(int sig)
631 if (getpid() != radius_pid) _exit(sig);
635 radius_signal_self(RADIUS_SIGNAL_SELF_TERM);
642 if (mainconfig.debug_memory || memory_report) {
643 radius_signal_self(RADIUS_SIGNAL_SELF_TERM);
655 * We got the hangup signal.
656 * Re-read the configuration files.
658 static void sig_hup(UNUSED int sig)
660 reset_signal(SIGHUP, sig_hup);
662 radius_signal_self(RADIUS_SIGNAL_SELF_HUP);