5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2002 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * Created: Wed Mar 19 00:17:12 1997
23 * This is the main program for the SILC daemon. This parses command
24 * line arguments and creates the server object.
28 #include "serverincludes.h"
29 #include "server_internal.h"
30 #include "silcversion.h"
32 /* For now, we'll have this one server context global for this module. */
33 static SilcServer silcd;
35 static void silc_usage(void);
37 /* Long command line options */
38 static struct option long_opts[] =
40 { "config-file", 1, NULL, 'f' },
41 { "passphrase", 1, NULL, 'p' },
42 { "debug", 2, NULL, 'd' },
43 { "debug-level", 1, NULL, 'D' },
44 { "hexdump", 0, NULL, 'x' },
45 { "help", 0, NULL, 'h' },
46 { "foreground", 0, NULL, 'F' },
47 { "version", 0, NULL,'V' },
49 /* Key management options */
50 { "create-key-pair", 1, NULL, 'C' },
51 { "pkcs", 1, NULL, 10 },
52 { "bits", 1, NULL, 11 },
53 { "identifier", 1, NULL, 12 },
58 /* Command line option variables */
59 static char *opt_keypath = NULL;
60 static char *opt_pkcs = "rsa";
61 static char *opt_identifier = NULL;
62 static int opt_bits = 2048;
64 /* Prints out the usage of silc client */
66 static void silc_usage(void)
69 "Usage: silcd [options]\n"
72 " -f --config-file=FILE Alternate configuration file\n"
73 " -d --debug=string Enable debugging (Implies --foreground)\n"
74 " -D --debug-level=level Enable debugging (Implies --foreground)\n"
75 " -x --hexdump Enable hexdumps (Implies --debug)\n"
76 " -h --help Display this message\n"
77 " -F --foreground Dont fork\n"
78 " -V --version Display version\n"
80 " Key Management Options:\n"
81 " -C, --create-key-pair=PATH Create new public key pair\n"
82 " --pkcs=PKCS Set the PKCS of the public key pair\n"
83 " --bits=VALUE Set length of the public key pair\n"
84 " --identifier=IDENTIFIER Public key identifier\n"
86 " The public key identifier may be of the following format:\n"
88 " UN=<username>, HN=<hostname or IP>, RN=<real name>, E=<email>,\n"
89 " O=<organization>, C=<country>\n"
91 " The UN and HN must be provided, the others are optional. If the\n"
92 " --identifier option is not used an identifier will be created for\n"
93 " the public key automatically.\n"
95 " Example identifier: \"UN=foobar, HN=foo.bar.com, RN=Foo T. Bar, \n"
96 " E=foo@bar.com, C=FI\"\n"
101 /* Die if a *valid* pid file exists already */
103 static void silc_server_checkpid(SilcServer silcd)
105 if (silcd->config->server_info->pid_file) {
110 SILC_LOG_DEBUG(("Checking for another silcd running"));
111 buf = silc_file_readfile(silcd->config->server_info->pid_file, &buf_len);
118 kill(oldpid, SIGCHLD); /* this signal does nothing, check if alive */
119 if (errno != ESRCH) {
120 fprintf(stderr, "\nI detected another daemon running with the "
122 fprintf(stderr, "Please change the config file, or erase the %s\n",
123 silcd->config->server_info->pid_file);
129 /* Drop root privileges. If some system call fails, die. */
131 static void silc_server_drop_privs(SilcServer server)
133 /* Are we executing silcd as root or a regular user? */
135 SILC_LOG_DEBUG(("Server started as user"));
142 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
144 /* Get the values given for user and group in configuration file */
145 user = server->config->server_info->user;
146 group = server->config->server_info->group;
148 if (!user || !group) {
149 fprintf(stderr, "Error:"
150 "\tSILC server must not be run as root. For the security of your\n"
151 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
152 "\tuser account. Modify the ServerInfo configuration section to run\n"
153 "\tthe server as non-root user.\n");
157 /* Check whether the user/group does not begin with a number */
158 if (isdigit(user[0]) || isdigit(group[0])) {
159 SILC_LOG_DEBUG(("User and/or group starts with a number"));
160 fprintf(stderr, "Invalid user and/or group information\n");
161 fprintf(stderr, "Please assign them as names, not numbers\n");
165 if (!(pw = getpwnam(user))) {
166 fprintf(stderr, "Error: No such user %s found.\n", user);
169 if (!(gr = getgrnam(group))) {
170 fprintf(stderr, "Error: No such group %s found.\n", group);
174 /* Check whether user and/or group is set to root. If yes, exit
175 immediately. Otherwise, setgid and setuid server to user.group */
176 if ((gr->gr_gid == 0) || (pw->pw_uid == 0)) {
177 fprintf(stderr, "Error:"
178 "\tSILC server must not be run as root. For the security of your\n"
179 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
180 "\tuser account. Modify the ServerInfo configuration section to run\n"
181 "\tthe server as non-root user.\n");
185 SILC_LOG_DEBUG(("Changing to group %s (gid=%u)", group, gr->gr_gid));
186 if (setgid(gr->gr_gid) != 0) {
187 fprintf(stderr, "Error: Failed setgid() to %s (gid=%u). Exiting.\n",
191 #if defined HAVE_SETGROUPS && defined HAVE_INITGROUPS
192 SILC_LOG_DEBUG(("Removing supplementary groups"));
193 if (setgroups(0, NULL) != 0) {
194 fprintf(stderr, "Error: Failed setgroups() to NULL. Exiting.\n");
197 SILC_LOG_DEBUG(("Setting supplementary groups for user %s", user));
198 if (initgroups(user, gr->gr_gid) != 0) {
199 fprintf(stderr, "Error: Failed initgroups() for user %s (gid=%u). "
200 "Exiting.\n", user, gr->gr_gid);
204 SILC_LOG_DEBUG(("Changing to user %s (uid=%u)", user, pw->pw_uid));
205 if (setuid(pw->pw_uid) != 0) {
206 fprintf(stderr, "Error: Failed to setuid() to %s (gid=%u). Exiting.\n",
213 /* Fork server to background */
215 static void silc_server_daemonise(SilcServer server)
219 SILC_LOG_DEBUG(("Forking SILC server to background"));
221 if ((i = fork()) < 0) {
222 fprintf(stderr, "Error: fork() failed: %s\n", strerror(errno));
226 if (i) /* Kill the parent */
229 server->background = TRUE;
232 /* XXX close stdin, stdout, stderr -- before this, check that all writes
233 to stderr are changed to SILC_SERVER_LOG_ERROR() */
236 static void signal_handler(int sig)
238 /* Mark the signal to be caller after this signal is over. */
239 silc_schedule_signal_call(silcd->schedule, sig);
242 SILC_TASK_CALLBACK(got_hup)
244 /* First, reset all log files (they might have been deleted) */
245 silc_log_reset_all();
247 /* Rehash the configuration file */
248 silc_server_rehash(silcd);
251 SILC_TASK_CALLBACK(stop_server)
253 /* Stop scheduler, the program will stop eventually after noticing
254 that the scheduler is down. */
255 silc_schedule_stop(silcd->schedule);
258 /* Dump server statistics into a file into /tmp directory */
260 SILC_TASK_CALLBACK(dump_stats)
265 memset(filename, 0, sizeof(filename));
266 snprintf(filename, sizeof(filename) - 1, "/tmp/silcd.%d.stats", getpid());
267 fdd = fopen(filename, "w+");
271 #define STAT_OUTPUT(fmt, stat) fprintf(fdd, fmt "\n", (int)stat);
273 fprintf(fdd, "SILC Server %s Statistics\n\n", silcd->server_name);
274 fprintf(fdd, "Local Stats:\n");
275 STAT_OUTPUT(" My clients : %d", silcd->stat.my_clients);
276 STAT_OUTPUT(" My servers : %d", silcd->stat.my_servers);
277 STAT_OUTPUT(" My routers : %d", silcd->stat.my_routers);
278 STAT_OUTPUT(" My channels : %d", silcd->stat.my_channels);
279 STAT_OUTPUT(" My joined users : %d", silcd->stat.my_chanclients);
280 STAT_OUTPUT(" My aways : %d", silcd->stat.my_aways);
281 STAT_OUTPUT(" My detached clients : %d", silcd->stat.my_detached);
282 STAT_OUTPUT(" My server operators : %d", silcd->stat.my_server_ops);
283 STAT_OUTPUT(" My router operators : %d", silcd->stat.my_router_ops);
284 fprintf(fdd, "\nGlobal Stats:\n");
285 STAT_OUTPUT(" Cell clients : %d", silcd->stat.cell_clients);
286 STAT_OUTPUT(" Cell servers : %d", silcd->stat.cell_servers);
287 STAT_OUTPUT(" Cell channels : %d", silcd->stat.cell_channels);
288 STAT_OUTPUT(" Cell joined users : %d", silcd->stat.cell_chanclients);
289 STAT_OUTPUT(" All clients : %d", silcd->stat.clients);
290 STAT_OUTPUT(" All servers : %d", silcd->stat.servers);
291 STAT_OUTPUT(" All routers : %d", silcd->stat.routers);
292 STAT_OUTPUT(" All channels : %d", silcd->stat.channels);
293 STAT_OUTPUT(" All joined users : %d", silcd->stat.chanclients);
294 STAT_OUTPUT(" All aways : %d", silcd->stat.aways);
295 STAT_OUTPUT(" All detached clients : %d", silcd->stat.detached);
296 STAT_OUTPUT(" All server operators : %d", silcd->stat.server_ops);
297 STAT_OUTPUT(" All router operators : %d", silcd->stat.router_ops);
298 fprintf(fdd, "\nGeneral Stats:\n");
299 STAT_OUTPUT(" Connection attempts : %d", silcd->stat.conn_attempts);
300 STAT_OUTPUT(" Connection failures : %d", silcd->stat.conn_failures);
301 STAT_OUTPUT(" Authentication attempts : %d", silcd->stat.auth_attempts);
302 STAT_OUTPUT(" Authentication failures : %d", silcd->stat.auth_failures);
303 STAT_OUTPUT(" Packets sent : %d", silcd->stat.packets_sent);
304 STAT_OUTPUT(" Packets received : %d", silcd->stat.packets_received);
317 static DebugLevel debug_levels[] = {
318 /* Very basic stuff from silcd/ */
319 { 3, "silcd\\.c,server\\.c" },
321 /* More stuff from silcd/ */
322 { 7, "silcd\\.c,server\\.c,command\\.c,server_backup\\.c,packet_send\\.c" },
324 /* All basic stuff from silcd/ */
325 { 10, "silc_server_*" },
327 /* All from silcd/ */
328 { 15, "*silcd*,*serverid*,silc_server_*,*idlist*" },
330 /* All from silcd/ and basic stuff from libs */
331 { 20, "*silcd*,*serverid*,silc_server_*,*idlist*,*silcauth*,*silcske*" },
333 /* All from silcd/ and more stuff from libs */
334 { 25, "*silcd*,*serverid*,silc_server_*,*idlist*,*silcauth*,"
335 "*silcpacket*,*ske*,*silcrng*" },
337 /* All from silcd/ and even more stuff from libs */
338 { 30, "*silcd*,*serverid*,silc_server_*,*idlist*,*silcauth*,"
339 "*silcpacket*,*ske*,*silcrng*,*command*,*channel*,*private*,*notify*" },
341 /* All from silcd/ and even more stuff from libs + all from silccore */
342 { 35, "*silcd*,*serverid*,silc_server_*,*idlist*,*silcauth*,"
343 "*silcpacket*,*ske*,*silcrng*,*command*,*channel*,*private*,*notify*"
344 "*silcid*,*argument*" },
346 /* All from silcd/, all from silccore, silccrypt and silcmath */
347 { 40, "*silcd*,*serverid*,silc_server_*,*idlist*,*silcauth*,"
348 "*silcpacket*,*ske*,*silcrng*,*command*,*channel*,*private*,*notify*"
349 "*silcid*,*argument*,*pkcs*,*hmac*,*hash*,*cipher*,silc_math*" },
351 /* All from silcd/, all from silccore, silccrypt and silcmath + stuff
353 { 45, "*silcd*,*serverid*,silc_server_*,*idlist*,*silcauth*,"
354 "*silcpacket*,*ske*,*silcrng*,*command*,*channel*,*private*,*notify*"
355 "*silcid*,*argument*,*pkcs*,*hmac*,*hash*,*cipher*,silc_math*,*sim*"
358 /* All from silcd/, all from silccore, silccrypt and silcmath + more stuff
360 { 50, "*silcd*,*serverid*,silc_server_*,*idlist*,*silcauth*,"
361 "*silcpacket*,*ske*,*silcrng*,*command*,*channel*,*private*,*notify*"
362 "*silcid*,*argument*,*pkcs*,*hmac*,*hash*,*cipher*,silc_math*,*sim*"
363 "*sockconn*,*net*" },
365 /* All from silcd/, all from silccore, silccrypt and silcmath + more stuff
367 { 55, "*silcd*,*serverid*,silc_server_*,*idlist*,*silcauth*,"
368 "*silcpacket*,*ske*,*silcrng*,*command*,*channel*,*private*,*notify*"
369 "*silcid*,*argument*,*pkcs*,*hmac*,*hash*,*cipher*,silc_math*,*sim*"
370 "*sockconn*,*net*,*log*,*config*" },
378 static void silc_get_debug_level(int level)
385 for (i = 0; debug_levels[i].string; i++)
386 if (level <= debug_levels[i].level) {
387 silc_log_set_debug_string(debug_levels[i].string);
392 /* This function should not be called directly but thru the wrapper
393 macro SILC_SERVER_LOG_STDERR() */
395 void silc_server_stderr(char *message)
397 if (silcd->background) {
398 char *p, *n = message;
400 /* remove newlines if we are going to output it to a log file */
401 for (p = n; *p; p++) {
410 silc_log_output(SILC_LOG_ERROR, message);
413 fprintf(stderr, "%s\n", message);
418 int main(int argc, char **argv)
420 int ret, opt, option_index;
421 bool foreground = FALSE;
422 bool opt_create_keypair = FALSE;
423 char *silcd_config_file = NULL;
426 /* Parse command line arguments */
428 while ((opt = getopt_long(argc, argv, "f:p:d:D:xhFVC:",
429 long_opts, &option_index)) != EOF) {
435 printf("SILCd Secure Internet Live Conferencing daemon, "
436 "version %s (base: SILC Toolkit %s)\n",
437 silc_dist_version, silc_version);
438 printf("(c) 1997 - 2002 Pekka Riikonen "
439 "<priikone@silcnet.org>\n");
446 silc_log_set_debug_string(optarg);
447 foreground = TRUE; /* implied */
448 silc_log_quick = TRUE; /* implied */
451 "Run-time debugging is not enabled. To enable it recompile\n"
452 "the server with --enable-debug configuration option.\n");
459 silc_get_debug_level(atoi(optarg));
460 foreground = TRUE; /* implied */
461 silc_log_quick = TRUE; /* implied */
464 "Run-time debugging is not enabled. To enable it recompile\n"
465 "the server with --enable-debug configuration option.\n");
470 silc_debug_hexdump = TRUE;
471 silc_debug = TRUE; /* implied */
472 foreground = TRUE; /* implied */
473 silc_log_quick = TRUE; /* implied */
476 "Run-time debugging is not enabled. To enable it recompile\n"
477 "the server with --enable-debug configuration option.\n");
481 silcd_config_file = strdup(optarg);
488 * Key management options
491 opt_create_keypair = TRUE;
493 opt_keypath = strdup(optarg);
497 opt_pkcs = strdup(optarg);
501 opt_bits = atoi(optarg);
505 opt_identifier = strdup(optarg);
515 if (opt_create_keypair == TRUE) {
516 /* Create new key pair and exit */
517 char pubfile[256], prvfile[256];
519 memset(pubfile, 0, sizeof(pubfile));
520 memset(prvfile, 0, sizeof(prvfile));
521 snprintf(pubfile, sizeof(pubfile) - 1, "%s/silcd.pub", opt_keypath);
522 snprintf(prvfile, sizeof(prvfile) - 1, "%s/silcd.prv", opt_keypath);
524 silc_cipher_register_default();
525 silc_pkcs_register_default();
526 silc_hash_register_default();
527 silc_hmac_register_default();
528 silc_create_key_pair(opt_pkcs, opt_bits, pubfile, prvfile,
529 opt_identifier, NULL, NULL, NULL, FALSE);
533 /* Default configuration file */
534 if (!silcd_config_file)
535 silcd_config_file = strdup(SILC_SERVER_CONFIG_FILE);
537 /* Create SILC Server object */
538 ret = silc_server_alloc(&silcd);
542 /* Read configuration files */
543 silcd->config = silc_server_config_alloc(silcd_config_file);
544 if (silcd->config == NULL)
546 silcd->config_file = silcd_config_file;
548 /* Check for another silcd running */
549 silc_server_checkpid(silcd);
551 /* Initialize the server */
552 if (silc_server_init(silcd) == FALSE)
556 sa.sa_handler = SIG_IGN;
558 sigemptyset(&sa.sa_mask);
559 sigaction(SIGPIPE, &sa, NULL);
560 sa.sa_handler = signal_handler;
561 sigaction(SIGHUP, &sa, NULL);
562 sigaction(SIGTERM, &sa, NULL);
563 sigaction(SIGINT, &sa, NULL);
564 sigaction(SIGUSR1, &sa, NULL);
565 silc_schedule_signal_register(silcd->schedule, SIGHUP, got_hup, NULL);
566 silc_schedule_signal_register(silcd->schedule, SIGTERM, stop_server, NULL);
567 silc_schedule_signal_register(silcd->schedule, SIGINT, stop_server, NULL);
568 silc_schedule_signal_register(silcd->schedule, SIGUSR1, dump_stats, NULL);
571 /* Before running the server, fork to background. */
572 silc_server_daemonise(silcd);
574 /* If set, write pid to file */
575 if (silcd->config->server_info->pid_file) {
576 char buf[10], *pidfile = silcd->config->server_info->pid_file;
578 snprintf(buf, sizeof(buf) - 1, "%d\n", getpid());
579 silc_file_writefile(pidfile, buf, strlen(buf));
583 /* Drop root if we are not in debug mode, so you don't need to bother about
584 file writing permissions and so on */
586 silc_server_drop_privs(silcd);
588 /* Run the server. When this returns the server has been stopped
590 silc_server_run(silcd);
592 /* Stop the server and free it. */
593 silc_server_stop(silcd);
594 silc_server_config_destroy(silcd->config);
595 silc_server_free(silcd);
597 /* Flush the logging system */
598 silc_log_flush_all();
600 silc_free(silcd_config_file);
601 silc_free(opt_identifier);
602 silc_free(opt_keypath);
606 silc_free(silcd_config_file);
607 silc_free(opt_identifier);
608 silc_free(opt_keypath);