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 2000-2004,2006 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>
28 #include <freeradius-devel/ident.h>
31 #include <freeradius-devel/radiusd.h>
32 #include <freeradius-devel/radius_snmp.h>
33 #include <freeradius-devel/modules.h>
34 #include <freeradius-devel/rad_assert.h>
47 #ifdef HAVE_SYS_WAIT_H
48 # include <sys/wait.h>
51 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
54 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
57 #ifndef HAVE_PTHREAD_H
58 #define thread_pool_lock(_x)
59 #define thread_pool_unlock(_x)
65 const char *progname = NULL;
66 const char *radius_dir = NULL;
67 const char *radacct_dir = NULL;
68 const char *radlog_dir = NULL;
69 const char *radlib_dir = NULL;
70 int log_stripped_names;
72 int check_config = FALSE;
74 const char *radiusd_version = "FreeRADIUS Version " RADIUSD_VERSION ", for host " HOSTINFO ", built on " __DATE__ " at " __TIME__;
79 static int debug_memory = 0;
82 * Configuration items.
88 static void usage(int);
90 static void sig_fatal (int);
92 static void sig_hup (int);
98 int main(int argc, char *argv[])
102 int spawn_flag = TRUE;
103 int dont_fork = FALSE;
106 #ifdef HAVE_SIGACTION
107 struct sigaction act;
111 set_auth_parameters(argc,argv);
114 if ((progname = strrchr(argv[0], FR_DIR_SEP)) == NULL)
122 if (WSAStartup(MAKEWORD(2, 0), &wsaData)) {
123 fprintf(stderr, "%s: Unable to initialize socket library.\n");
131 radius_dir = strdup(RADIUS_DIR);
134 * Ensure that the configuration is initialized.
136 memset(&mainconfig, 0, sizeof(mainconfig));
137 mainconfig.myip.af = AF_UNSPEC;
138 mainconfig.port = -1;
139 mainconfig.name = "radiusd";
141 #ifdef HAVE_SIGACTION
142 memset(&act, 0, sizeof(act));
144 sigemptyset( &act.sa_mask ) ;
148 * Don't put output anywhere until we get told a little
151 mainconfig.radlog_fd = -1;
152 mainconfig.log_file = NULL;
154 /* Process the options. */
155 while ((argval = getopt(argc, argv, "Cd:fhi:mn:p:svxX")) != EOF) {
165 if (radius_dir) free(radius_dir);
166 radius_dir = strdup(optarg);
178 if (ip_hton(optarg, AF_UNSPEC, &mainconfig.myip) < 0) {
179 fprintf(stderr, "radiusd: Invalid IP Address or hostname \"%s\"\n", optarg);
186 mainconfig.name = optarg;
194 mainconfig.port = atoi(optarg);
195 if ((mainconfig.port <= 0) ||
196 (mainconfig.port >= 65536)) {
197 fprintf(stderr, "radiusd: Invalid port number %s\n", optarg);
203 case 's': /* Single process mode */
216 mainconfig.log_auth = TRUE;
217 mainconfig.log_auth_badpass = TRUE;
218 mainconfig.log_auth_goodpass = TRUE;
219 mainconfig.radlog_dest = RADLOG_STDOUT;
220 mainconfig.radlog_fd = STDOUT_FILENO;
233 if (flag && (flag != 0x03)) {
234 fprintf(stderr, "radiusd: The options -i and -p cannot be used individually.\n");
239 radlog(L_INFO, "%s", radiusd_version);
240 radlog(L_INFO, "Copyright (C) 2000-2007 The FreeRADIUS server project.\n");
241 radlog(L_INFO, "There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A\n");
242 radlog(L_INFO, "PARTICULAR PURPOSE.\n");
243 radlog(L_INFO, "You may redistribute copies of FreeRADIUS under the terms of the\n");
244 radlog(L_INFO, "GNU General Public License.\n");
248 /* Read the configuration files, BEFORE doing anything else. */
249 if (read_mainconfig(0) < 0) {
255 * Disconnect from session
257 if (debug_flag == 0 && dont_fork == FALSE) {
261 radlog(L_ERR, "Couldn't fork: %s", strerror(errno));
266 * The parent exits, so the child can run in the background.
278 * Ensure that we're using the CORRECT pid after forking,
279 * NOT the one we started with.
281 radius_pid = getpid();
284 * Only write the PID file if we're running as a daemon.
286 * And write it AFTER we've forked, so that we write the
289 if (dont_fork == FALSE) {
292 fp = fopen(mainconfig.pid_file, "w");
295 * FIXME: What about following symlinks,
296 * and having it over-write a normal file?
298 fprintf(fp, "%d\n", (int) radius_pid);
301 radlog(L_ERR|L_CONS, "Failed creating PID file %s: %s\n",
302 mainconfig.pid_file, strerror(errno));
308 * If we're running as a daemon, close the default file
309 * descriptors, AFTER forking.
314 devnull = open("/dev/null", O_RDWR);
316 radlog(L_ERR|L_CONS, "Failed opening /dev/null: %s\n",
320 dup2(devnull, STDIN_FILENO);
321 if (mainconfig.radlog_dest == RADLOG_STDOUT) {
322 mainconfig.radlog_fd = dup(STDOUT_FILENO);
324 dup2(devnull, STDOUT_FILENO);
325 if (mainconfig.radlog_dest == RADLOG_STDERR) {
326 mainconfig.radlog_fd = dup(STDERR_FILENO);
328 dup2(devnull, STDERR_FILENO);
332 setlinebuf(stdout); /* unbuffered output */
336 * It's called the thread pool, but it does a little
339 radius_event_init(mainconfig.config, spawn_flag);
342 * Now that we've set everything up, we can install the signal
343 * handlers. Before this, if we get any signal, we don't know
344 * what to do, so we might as well do the default, and die.
347 signal(SIGPIPE, SIG_IGN);
349 #ifdef HAVE_SIGACTION
350 act.sa_handler = sig_hup;
351 sigaction(SIGHUP, &act, NULL);
352 act.sa_handler = sig_fatal;
353 sigaction(SIGTERM, &act, NULL);
356 signal(SIGHUP, sig_hup);
358 signal(SIGTERM, sig_fatal);
361 * If we're debugging, then a CTRL-C will cause the
362 * server to die immediately. Use SIGTERM to shut down
363 * the server cleanly in that case.
365 if ((debug_memory == 1) || (debug_flag == 0)) {
366 #ifdef HAVE_SIGACTION
367 act.sa_handler = sig_fatal;
368 sigaction(SIGINT, &act, NULL);
369 sigaction(SIGQUIT, &act, NULL);
371 signal(SIGINT, sig_fatal);
373 signal(SIGQUIT, sig_fatal);
379 * Everything seems to have loaded OK, exit gracefully.
382 DEBUG("Configuration appears OK.");
387 * Process requests until HUP or exit.
389 while ((rcode = radius_event_process()) == 0x80) {
390 module_hup(cf_section_sub_find(mainconfig.config, "modules"));
396 * Ignore the TERM signal: we're
399 signal(SIGTERM, SIG_IGN);
402 * Send a TERM signal to all
403 * associated processes
404 * (including us, which gets
408 kill(-radius_pid, SIGTERM);
412 * We're exiting, so we can delete the PID
413 * file. (If it doesn't exist, we can ignore
414 * the error returned by unlink)
416 if (dont_fork == FALSE) {
417 unlink(mainconfig.pid_file);
423 * Free the configuration items.
428 * Detach any modules.
432 xlat_free(); /* modules may have xlat's */
445 * Display the syntax for starting this program.
447 static void NEVER_RETURNS usage(int status)
449 FILE *output = status?stderr:stdout;
452 "Usage: %s [-d db_dir] [-l log_dir] [-i address] [-n name] [-fsvXx]\n", progname);
453 fprintf(output, "Options:\n\n");
454 fprintf(output, " -C Check configuration and exit.\n");
455 fprintf(output, " -d raddb_dir Configuration files are in \"raddbdir/*\".\n");
456 fprintf(output, " -f Run as a foreground process, not a daemon.\n");
457 fprintf(output, " -h Print this help message.\n");
458 fprintf(output, " -i ipaddr Listen on ipaddr ONLY\n");
459 fprintf(output, " -n name Read raddb/name.conf instead of raddb/radiusd.conf\n");
460 fprintf(output, " -p port Listen on port ONLY\n");
461 fprintf(output, " -s Do not spawn child processes to handle requests.\n");
462 fprintf(output, " -v Print server version information.\n");
463 fprintf(output, " -X Turn on full debugging.\n");
464 fprintf(output, " -x Turn on additional debugging. (-xx gives more debugging).\n");
470 * We got a fatal signal.
472 static void sig_fatal(int sig)
477 * We can't really do anything
478 * intelligent here so just die
483 radius_signal_self(RADIUS_SIGNAL_SELF_TERM);
491 radius_signal_self(RADIUS_SIGNAL_SELF_TERM);
497 radius_signal_self(RADIUS_SIGNAL_SELF_EXIT);
504 * We got the hangup signal.
505 * Re-read the configuration files.
507 static void sig_hup(int sig)
509 sig = sig; /* -Wunused */
511 reset_signal(SIGHUP, sig_hup);
513 radius_signal_self(RADIUS_SIGNAL_SELF_HUP);