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>
45 #ifdef HAVE_SYS_WAIT_H
46 # include <sys/wait.h>
49 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
52 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
58 char const *progname = NULL;
59 char const *radius_dir = NULL;
60 char const *radacct_dir = NULL;
61 char const *radlog_dir = NULL;
62 char const *radlib_dir = NULL;
63 bool log_stripped_names;
64 log_debug_t debug_flag = 0;
65 bool check_config = false;
66 bool memory_report = false;
68 char const *radiusd_version = "FreeRADIUS Version " RADIUSD_VERSION_STRING
69 #ifdef RADIUSD_VERSION_COMMIT
70 " (git #" RADIUSD_VERSION_COMMIT ")"
72 ", for host " HOSTINFO ", built on " __DATE__ " at " __TIME__;
77 * Configuration items.
83 static void usage(int);
85 static void sig_fatal (int);
87 static void sig_hup (int);
90 #ifdef WITH_VERIFY_PTR
91 static void die_horribly(char const *reason)
93 ERROR("talloc abort: %s\n", reason);
101 int main(int argc, char *argv[])
103 int rcode = EXIT_SUCCESS;
106 int spawn_flag = true;
107 int dont_fork = false;
108 int write_pid = false;
110 int from_child[2] = {-1, -1};
112 #ifdef HAVE_SIGACTION
113 struct sigaction act;
117 set_auth_parameters(argc,argv);
120 if ((progname = strrchr(argv[0], FR_DIR_SEP)) == NULL)
128 if (WSAStartup(MAKEWORD(2, 0), &wsaData)) {
129 fprintf(stderr, "%s: Unable to initialize socket library.\n", progname);
137 radius_dir = talloc_strdup(NULL, RADIUS_DIR);
140 * Ensure that the configuration is initialized.
142 memset(&mainconfig, 0, sizeof(mainconfig));
143 mainconfig.myip.af = AF_UNSPEC;
144 mainconfig.port = -1;
145 mainconfig.name = "radiusd";
147 #ifdef HAVE_SIGACTION
148 memset(&act, 0, sizeof(act));
150 sigemptyset( &act.sa_mask ) ;
154 * Don't put output anywhere until we get told a little
157 default_log.dest = L_DST_NULL;
159 mainconfig.log_file = NULL;
161 /* Process the options. */
162 while ((argval = getopt(argc, argv, "Cd:D:fhi:l:mMn:p:PstvxX")) != EOF) {
173 rad_const_free(radius_dir);
175 radius_dir = talloc_strdup(NULL, optarg);
179 mainconfig.dictionary_dir = talloc_strdup(NULL, optarg);
191 if (strcmp(optarg, "stdout") == 0) {
194 mainconfig.log_file = strdup(optarg);
195 default_log.dest = L_DST_FILES;
196 default_log.fd = open(mainconfig.log_file,
197 O_WRONLY | O_APPEND | O_CREAT, 0640);
198 if (default_log.fd < 0) {
199 fprintf(stderr, "radiusd: Failed to open log file %s: %s\n", mainconfig.log_file, strerror(errno));
202 fr_log_fp = fdopen(default_log.fd, "a");
206 if (ip_hton(optarg, AF_UNSPEC, &mainconfig.myip) < 0) {
207 fprintf(stderr, "radiusd: Invalid IP Address or hostname \"%s\"\n", optarg);
214 mainconfig.name = optarg;
218 mainconfig.debug_memory = 1;
223 mainconfig.debug_memory = 1;
227 mainconfig.port = atoi(optarg);
228 if ((mainconfig.port <= 0) ||
229 (mainconfig.port >= 65536)) {
230 fprintf(stderr, "radiusd: Invalid port number %s\n", optarg);
237 /* Force the PID to be written, even in -f mode */
241 case 's': /* Single process mode */
246 case 't': /* no child threads */
251 /* Don't print timestamps */
254 default_log.dest = L_DST_STDOUT;
255 default_log.fd = STDOUT_FILENO;
263 mainconfig.log_auth = true;
264 mainconfig.log_auth_badpass = true;
265 mainconfig.log_auth_goodpass = true;
268 default_log.dest = L_DST_STDOUT;
269 default_log.fd = STDOUT_FILENO;
283 talloc_enable_null_tracking();
284 #ifdef WITH_VERIFY_PTR
285 talloc_set_abort_fn(die_horribly);
288 talloc_set_log_fn(log_talloc);
291 * Mismatch between build time OpenSSL and linked SSL,
292 * better to die here than segfault later.
294 #ifdef HAVE_OPENSSL_CRYPTO_H
295 if (ssl_check_version() < 0) {
300 * Initialising OpenSSL once, here, is safer than having individual
306 if (flag && (flag != 0x03)) {
307 fprintf(stderr, "radiusd: The options -i and -p cannot be used individually.\n");
315 /* Read the configuration files, BEFORE doing anything else. */
316 if (read_mainconfig(0) < 0) {
322 * Disconnect from session
324 if (dont_fork == false) {
327 if (pipe(from_child) != 0) {
328 ERROR("Couldn't open pipe for child status: %s", strerror(errno));
334 ERROR("Couldn't fork: %s", strerror(errno));
339 * The parent exits, so the child can run in the background.
341 * As the child can still encounter an error during initialisation
342 * we do a blocking read on a pipe between it and the parent.
344 * Just before entering the event loop the child will send a success
345 * or failure message to the parent, via the pipe.
351 /* So the pipe is correctly widowed if the child exits */
352 close(from_child[1]);
355 * The child writes a 0x01 byte on
356 * success, and closes the pipe on error.
358 if ((read(from_child[0], &ret, 1) < 0)) {
362 /* For cleanliness... */
363 close(from_child[0]);
365 /* Don't turn children into zombies */
367 waitpid(pid, &stat_loc, WNOHANG);
374 /* so the pipe is correctly widowed if the parent exits?! */
375 close(from_child[0]);
383 * Ensure that we're using the CORRECT pid after forking,
384 * NOT the one we started with.
386 radius_pid = getpid();
389 * If we're running as a daemon, close the default file
390 * descriptors, AFTER forking.
395 devnull = open("/dev/null", O_RDWR);
397 ERROR("Failed opening /dev/null: %s\n",
401 dup2(devnull, STDIN_FILENO);
402 if (default_log.dest == L_DST_STDOUT) {
404 default_log.fd = STDOUT_FILENO;
406 dup2(devnull, STDOUT_FILENO);
408 if (default_log.dest == L_DST_STDERR) {
410 default_log.fd = STDERR_FILENO;
412 dup2(devnull, STDERR_FILENO);
417 setlinebuf(stdout); /* unbuffered output */
421 * Now we have logging check that the OpenSSL
425 * Initialize the event pool, including threads.
427 radius_event_init(mainconfig.config, spawn_flag);
430 * Now that we've set everything up, we can install the signal
431 * handlers. Before this, if we get any signal, we don't know
432 * what to do, so we might as well do the default, and die.
435 signal(SIGPIPE, SIG_IGN);
437 #ifdef HAVE_SIGACTION
438 act.sa_handler = sig_hup;
439 sigaction(SIGHUP, &act, NULL);
440 act.sa_handler = sig_fatal;
441 sigaction(SIGTERM, &act, NULL);
444 signal(SIGHUP, sig_hup);
446 signal(SIGTERM, sig_fatal);
449 * If we're debugging, then a CTRL-C will cause the
450 * server to die immediately. Use SIGTERM to shut down
451 * the server cleanly in that case.
453 if ((mainconfig.debug_memory == 1) || (debug_flag == 0)) {
454 #ifdef HAVE_SIGACTION
455 act.sa_handler = sig_fatal;
456 sigaction(SIGINT, &act, NULL);
457 sigaction(SIGQUIT, &act, NULL);
459 signal(SIGINT, sig_fatal);
461 signal(SIGQUIT, sig_fatal);
467 * Everything seems to have loaded OK, exit gracefully.
470 DEBUG("Configuration appears to be OK.");
473 if (mainconfig.debug_memory) {
481 radius_stats_init(0);
485 * Write out the PID anyway if were in foreground mode.
487 if (!dont_fork) write_pid = true;
490 * Only write the PID file if we're running as a daemon.
492 * And write it AFTER we've forked, so that we write the
498 fp = fopen(mainconfig.pid_file, "w");
501 * FIXME: What about following symlinks,
502 * and having it over-write a normal file?
504 fprintf(fp, "%d\n", (int) radius_pid);
507 ERROR("Failed creating PID file %s: %s\n",
508 mainconfig.pid_file, strerror(errno));
513 exec_trigger(NULL, NULL, "server.start", false);
516 * Inform the parent (who should still be waiting) that
517 * the rest of initialisation went OK, and that it should
518 * exit with a 0 status. If we don't get this far, then
519 * we just close the pipe on exit, and the parent gets a
523 if (write(from_child[1], "\001", 1) < 0) {
524 WARN("Failed informing parent of successful start: %s",
527 close(from_child[1]);
531 * Process requests until HUP or exit.
533 while ((status = radius_event_process()) == 0x80) {
535 radius_stats_init(1);
540 ERROR("Exiting due to internal error: %s", fr_strerror());
541 rcode = EXIT_FAILURE;
543 INFO("Exiting normally.");
546 exec_trigger(NULL, NULL, "server.stop", false);
549 * Ignore the TERM signal: we're
552 signal(SIGTERM, SIG_IGN);
555 * Send a TERM signal to all
556 * associated processes
557 * (including us, which gets
561 if (spawn_flag) kill(-radius_pid, SIGTERM);
565 * We're exiting, so we can delete the PID
566 * file. (If it doesn't exist, we can ignore
567 * the error returned by unlink)
569 if (dont_fork == false) {
570 unlink(mainconfig.pid_file);
577 * Detach any modules.
581 xlat_free(); /* modules may have xlat's */
584 * Free the configuration items.
588 rad_const_free(radius_dir);
595 INFO("Allocated memory at time of report:");
596 log_talloc_report(NULL);
604 * Display the syntax for starting this program.
606 static void NEVER_RETURNS usage(int status)
608 FILE *output = status?stderr:stdout;
610 fprintf(output, "Usage: %s [-d db_dir] [-l log_dir] [-i address] [-n name] [-fsvXx]\n", progname);
611 fprintf(output, "Options:\n");
612 fprintf(output, " -C Check configuration and exit.\n");
613 fprintf(output, " -d raddb_dir Configuration files are in \"raddbdir/*\".\n");
614 fprintf(output, " -f Run as a foreground process, not a daemon.\n");
615 fprintf(output, " -h Print this help message.\n");
616 fprintf(output, " -i ipaddr Listen on ipaddr ONLY.\n");
617 fprintf(output, " -l log_file Logging output will be written to this file.\n");
618 fprintf(output, " -m On SIGINT or SIGQUIT exit cleanly instead of immediately.\n");
619 fprintf(output, " -n name Read raddb/name.conf instead of raddb/radiusd.conf.\n");
620 fprintf(output, " -p port Listen on port ONLY.\n");
621 fprintf(output, " -P Always write out PID, even with -f.\n");
622 fprintf(output, " -s Do not spawn child processes to handle requests.\n");
623 fprintf(output, " -t Disable threads.\n");
624 fprintf(output, " -v Print server version information.\n");
625 fprintf(output, " -X Turn on full debugging.\n");
626 fprintf(output, " -x Turn on additional debugging. (-xx gives more debugging).\n");
632 * We got a fatal signal.
634 static void sig_fatal(int sig)
636 if (getpid() != radius_pid) _exit(sig);
640 radius_signal_self(RADIUS_SIGNAL_SELF_TERM);
647 if (mainconfig.debug_memory || memory_report) {
648 radius_signal_self(RADIUS_SIGNAL_SELF_TERM);
660 * We got the hangup signal.
661 * Re-read the configuration files.
663 static void sig_hup(UNUSED int sig)
665 reset_signal(SIGHUP, sig_hup);
667 radius_signal_self(RADIUS_SIGNAL_SELF_HUP);