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 #" STRINGIFY(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 the binary and the libraries it depends on
293 if (fr_check_lib_magic(RADIUSD_MAGIC_NUMBER) < 0) {
294 fr_perror("radiusd");
298 if (rad_check_lib_magic(RADIUSD_MAGIC_NUMBER) < 0) {
303 * Mismatch between build time OpenSSL and linked SSL,
304 * better to die here than segfault later.
306 #ifdef HAVE_OPENSSL_CRYPTO_H
307 if (ssl_check_version() < 0) {
312 * Initialising OpenSSL once, here, is safer than having individual
318 if (flag && (flag != 0x03)) {
319 fprintf(stderr, "radiusd: The options -i and -p cannot be used individually.\n");
327 /* Read the configuration files, BEFORE doing anything else. */
328 if (read_mainconfig(0) < 0) {
334 * Disconnect from session
336 if (dont_fork == false) {
339 if (pipe(from_child) != 0) {
340 ERROR("Couldn't open pipe for child status: %s", strerror(errno));
346 ERROR("Couldn't fork: %s", strerror(errno));
351 * The parent exits, so the child can run in the background.
353 * As the child can still encounter an error during initialisation
354 * we do a blocking read on a pipe between it and the parent.
356 * Just before entering the event loop the child will send a success
357 * or failure message to the parent, via the pipe.
363 /* So the pipe is correctly widowed if the child exits */
364 close(from_child[1]);
367 * The child writes a 0x01 byte on
368 * success, and closes the pipe on error.
370 if ((read(from_child[0], &ret, 1) < 0)) {
374 /* For cleanliness... */
375 close(from_child[0]);
377 /* Don't turn children into zombies */
379 waitpid(pid, &stat_loc, WNOHANG);
386 /* so the pipe is correctly widowed if the parent exits?! */
387 close(from_child[0]);
395 * Ensure that we're using the CORRECT pid after forking,
396 * NOT the one we started with.
398 radius_pid = getpid();
401 * If we're running as a daemon, close the default file
402 * descriptors, AFTER forking.
407 devnull = open("/dev/null", O_RDWR);
409 ERROR("Failed opening /dev/null: %s\n",
413 dup2(devnull, STDIN_FILENO);
414 if (default_log.dest == L_DST_STDOUT) {
416 default_log.fd = STDOUT_FILENO;
418 dup2(devnull, STDOUT_FILENO);
420 if (default_log.dest == L_DST_STDERR) {
422 default_log.fd = STDERR_FILENO;
424 dup2(devnull, STDERR_FILENO);
429 setlinebuf(stdout); /* unbuffered output */
433 * Now we have logging check that the OpenSSL
437 * Initialize the event pool, including threads.
439 radius_event_init(mainconfig.config, spawn_flag);
442 * Now that we've set everything up, we can install the signal
443 * handlers. Before this, if we get any signal, we don't know
444 * what to do, so we might as well do the default, and die.
447 signal(SIGPIPE, SIG_IGN);
449 #ifdef HAVE_SIGACTION
450 act.sa_handler = sig_hup;
451 sigaction(SIGHUP, &act, NULL);
452 act.sa_handler = sig_fatal;
453 sigaction(SIGTERM, &act, NULL);
456 signal(SIGHUP, sig_hup);
458 signal(SIGTERM, sig_fatal);
461 * If we're debugging, then a CTRL-C will cause the
462 * server to die immediately. Use SIGTERM to shut down
463 * the server cleanly in that case.
465 if ((mainconfig.debug_memory == 1) || (debug_flag == 0)) {
466 #ifdef HAVE_SIGACTION
467 act.sa_handler = sig_fatal;
468 sigaction(SIGINT, &act, NULL);
469 sigaction(SIGQUIT, &act, NULL);
471 signal(SIGINT, sig_fatal);
473 signal(SIGQUIT, sig_fatal);
479 * Everything seems to have loaded OK, exit gracefully.
482 DEBUG("Configuration appears to be OK.");
485 if (mainconfig.debug_memory) {
493 radius_stats_init(0);
497 * Write out the PID anyway if were in foreground mode.
499 if (!dont_fork) write_pid = true;
502 * Only write the PID file if we're running as a daemon.
504 * And write it AFTER we've forked, so that we write the
510 fp = fopen(mainconfig.pid_file, "w");
513 * FIXME: What about following symlinks,
514 * and having it over-write a normal file?
516 fprintf(fp, "%d\n", (int) radius_pid);
519 ERROR("Failed creating PID file %s: %s\n",
520 mainconfig.pid_file, strerror(errno));
525 exec_trigger(NULL, NULL, "server.start", false);
528 * Inform the parent (who should still be waiting) that
529 * the rest of initialisation went OK, and that it should
530 * exit with a 0 status. If we don't get this far, then
531 * we just close the pipe on exit, and the parent gets a
535 if (write(from_child[1], "\001", 1) < 0) {
536 WARN("Failed informing parent of successful start: %s",
539 close(from_child[1]);
543 * Process requests until HUP or exit.
545 while ((status = radius_event_process()) == 0x80) {
547 radius_stats_init(1);
552 ERROR("Exiting due to internal error: %s", fr_strerror());
553 rcode = EXIT_FAILURE;
555 INFO("Exiting normally.");
558 exec_trigger(NULL, NULL, "server.stop", false);
561 * Ignore the TERM signal: we're
564 signal(SIGTERM, SIG_IGN);
567 * Send a TERM signal to all
568 * associated processes
569 * (including us, which gets
573 if (spawn_flag) kill(-radius_pid, SIGTERM);
577 * We're exiting, so we can delete the PID
578 * file. (If it doesn't exist, we can ignore
579 * the error returned by unlink)
581 if (dont_fork == false) {
582 unlink(mainconfig.pid_file);
589 * Detach any modules.
593 xlat_free(); /* modules may have xlat's */
596 * Free the configuration items.
600 rad_const_free(radius_dir);
607 INFO("Allocated memory at time of report:");
608 log_talloc_report(NULL);
616 * Display the syntax for starting this program.
618 static void NEVER_RETURNS usage(int status)
620 FILE *output = status?stderr:stdout;
622 fprintf(output, "Usage: %s [-d db_dir] [-l log_dir] [-i address] [-n name] [-fsvXx]\n", progname);
623 fprintf(output, "Options:\n");
624 fprintf(output, " -C Check configuration and exit.\n");
625 fprintf(output, " -d raddb_dir Configuration files are in \"raddbdir/*\".\n");
626 fprintf(output, " -f Run as a foreground process, not a daemon.\n");
627 fprintf(output, " -h Print this help message.\n");
628 fprintf(output, " -i ipaddr Listen on ipaddr ONLY.\n");
629 fprintf(output, " -l log_file Logging output will be written to this file.\n");
630 fprintf(output, " -m On SIGINT or SIGQUIT exit cleanly instead of immediately.\n");
631 fprintf(output, " -n name Read raddb/name.conf instead of raddb/radiusd.conf.\n");
632 fprintf(output, " -p port Listen on port ONLY.\n");
633 fprintf(output, " -P Always write out PID, even with -f.\n");
634 fprintf(output, " -s Do not spawn child processes to handle requests.\n");
635 fprintf(output, " -t Disable threads.\n");
636 fprintf(output, " -v Print server version information.\n");
637 fprintf(output, " -X Turn on full debugging.\n");
638 fprintf(output, " -x Turn on additional debugging. (-xx gives more debugging).\n");
644 * We got a fatal signal.
646 static void sig_fatal(int sig)
648 if (getpid() != radius_pid) _exit(sig);
652 radius_signal_self(RADIUS_SIGNAL_SELF_TERM);
659 if (mainconfig.debug_memory || memory_report) {
660 radius_signal_self(RADIUS_SIGNAL_SELF_TERM);
672 * We got the hangup signal.
673 * Re-read the configuration files.
675 static void sig_hup(UNUSED int sig)
677 reset_signal(SIGHUP, sig_hup);
679 radius_signal_self(RADIUS_SIGNAL_SELF_HUP);