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edd7c245 1/* zebra daemon main routine.
718e3744 2 * Copyright (C) 1997, 98 Kunihiro Ishiguro
3 *
4 * This file is part of GNU Zebra.
5 *
6 * GNU Zebra is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
9 * later version.
10 *
11 * GNU Zebra is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with GNU Zebra; see the file COPYING. If not, write to the Free
18 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
19 * 02111-1307, USA.
20 */
21
22#include <zebra.h>
23
5e4fa164 24#include <lib/version.h>
718e3744 25#include "getopt.h"
26#include "command.h"
27#include "thread.h"
28#include "filter.h"
29#include "memory.h"
30#include "prefix.h"
31#include "log.h"
edd7c245 32#include "privs.h"
2d75d052 33#include "sigevent.h"
718e3744 34
35#include "zebra/rib.h"
36#include "zebra/zserv.h"
37#include "zebra/debug.h"
18a6dce6 38#include "zebra/router-id.h"
ca776988 39#include "zebra/irdp.h"
a1ac18c4 40#include "zebra/rtadv.h"
718e3744 41
b21b19c5 42/* Zebra instance */
43struct zebra_t zebrad =
44{
45 .rtm_table_default = 0,
46};
718e3744 47
48/* process id. */
49pid_t old_pid;
50pid_t pid;
51
87efd646 52/* Pacify zclient.o in libzebra, which expects this variable. */
53struct thread_master *master;
54
718e3744 55/* Route retain mode flag. */
56int retain_mode = 0;
57
58/* Don't delete kernel route. */
59int keep_kernel_mode = 0;
60
c34b6b57 61#ifdef HAVE_NETLINK
62/* Receive buffer size for netlink socket */
63u_int32_t nl_rcvbufsize = 0;
64#endif /* HAVE_NETLINK */
65
718e3744 66/* Command line options. */
67struct option longopts[] =
68{
69 { "batch", no_argument, NULL, 'b'},
70 { "daemon", no_argument, NULL, 'd'},
71 { "keep_kernel", no_argument, NULL, 'k'},
72 { "log_mode", no_argument, NULL, 'l'},
73 { "config_file", required_argument, NULL, 'f'},
74 { "pid_file", required_argument, NULL, 'i'},
75 { "help", no_argument, NULL, 'h'},
76 { "vty_addr", required_argument, NULL, 'A'},
77 { "vty_port", required_argument, NULL, 'P'},
78 { "retain", no_argument, NULL, 'r'},
c34b6b57 79#ifdef HAVE_NETLINK
583d800c 80 { "nl-bufsize", required_argument, NULL, 's'},
c34b6b57 81#endif /* HAVE_NETLINK */
edd7c245 82 { "user", required_argument, NULL, 'u'},
c065230a 83 { "group", required_argument, NULL, 'g'},
718e3744 84 { "version", no_argument, NULL, 'v'},
85 { 0 }
86};
87
edd7c245 88zebra_capabilities_t _caps_p [] =
89{
ceacedba 90 ZCAP_NET_ADMIN,
edd7c245 91 ZCAP_SYS_ADMIN,
ceacedba 92 ZCAP_NET_RAW,
edd7c245 93};
94
95/* zebra privileges to run with */
96struct zebra_privs_t zserv_privs =
97{
d81fadfd 98#if defined(QUAGGA_USER) && defined(QUAGGA_GROUP)
99 .user = QUAGGA_USER,
100 .group = QUAGGA_GROUP,
edd7c245 101#endif
102#ifdef VTY_GROUP
103 .vty_group = VTY_GROUP,
104#endif
105 .caps_p = _caps_p,
106 .cap_num_p = sizeof(_caps_p)/sizeof(_caps_p[0]),
107 .cap_num_i = 0
108};
109
718e3744 110/* Default configuration file path. */
718e3744 111char config_default[] = SYSCONFDIR DEFAULT_CONFIG_FILE;
112
113/* Process ID saved for use by init system */
fce954f8 114const char *pid_file = PATH_ZEBRA_PID;
718e3744 115
116/* Help information display. */
117static void
118usage (char *progname, int status)
119{
120 if (status != 0)
121 fprintf (stderr, "Try `%s --help' for more information.\n", progname);
122 else
123 {
c34b6b57 124 printf ("Usage : %s [OPTION...]\n\n"\
125 "Daemon which manages kernel routing table management and "\
126 "redistribution between different routing protocols.\n\n"\
127 "-b, --batch Runs in batch mode\n"\
128 "-d, --daemon Runs in daemon mode\n"\
129 "-f, --config_file Set configuration file name\n"\
130 "-i, --pid_file Set process identifier file name\n"\
131 "-k, --keep_kernel Don't delete old routes which installed by "\
132 "zebra.\n"\
133 "-l, --log_mode Set verbose log mode flag\n"\
134 "-A, --vty_addr Set vty's bind address\n"\
135 "-P, --vty_port Set vty's port number\n"\
136 "-r, --retain When program terminates, retain added route "\
137 "by zebra.\n"\
c065230a 138 "-u, --user User to run as\n"\
139 "-g, --group Group to run as\n", progname);
c34b6b57 140#ifdef HAVE_NETLINK
141 printf ("-s, --nl-bufsize Set netlink receive buffer size\n");
142#endif /* HAVE_NETLINK */
143 printf ("-v, --version Print program version\n"\
144 "-h, --help Display this help and exit\n"\
145 "\n"\
146 "Report bugs to %s\n", ZEBRA_BUG_ADDRESS);
718e3744 147 }
148
149 exit (status);
150}
151\f
152/* SIGHUP handler. */
a1ac18c4 153static void
2d75d052 154sighup (void)
718e3744 155{
156 zlog_info ("SIGHUP received");
157
158 /* Reload of config file. */
159 ;
160}
161
162/* SIGINT handler. */
a1ac18c4 163static void
2d75d052 164sigint (void)
718e3744 165{
166 /* Decrared in rib.c */
167 void rib_close ();
168
887c44a4 169 zlog_notice ("Terminating on signal");
718e3744 170
171 if (!retain_mode)
172 rib_close ();
ca776988 173#ifdef HAVE_IRDP
174 irdp_finish();
175#endif
718e3744 176
177 exit (0);
178}
179
180/* SIGUSR1 handler. */
a1ac18c4 181static void
2d75d052 182sigusr1 (void)
718e3744 183{
184 zlog_rotate (NULL);
185}
186
2d75d052 187struct quagga_signal_t zebra_signals[] =
718e3744 188{
2d75d052 189 {
190 .signal = SIGHUP,
191 .handler = &sighup,
192 },
193 {
194 .signal = SIGUSR1,
195 .handler = &sigusr1,
196 },
197 {
198 .signal = SIGINT,
8c903fbb 199 .handler = &sigint,
2d75d052 200 },
f571dab0 201 {
202 .signal = SIGTERM,
203 .handler = &sigint,
204 },
2d75d052 205};
718e3744 206\f
207/* Main startup routine. */
208int
209main (int argc, char **argv)
210{
211 char *p;
212 char *vty_addr = NULL;
4fc4e7ab 213 int vty_port = ZEBRA_VTY_PORT;
718e3744 214 int batch_mode = 0;
215 int daemon_mode = 0;
216 char *config_file = NULL;
217 char *progname;
218 struct thread thread;
718e3744 219
220 /* Set umask before anything for security */
221 umask (0027);
222
223 /* preserve my name */
224 progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
225
274a4a44 226 zlog_default = openzlog (progname, ZLOG_ZEBRA,
718e3744 227 LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
228
229 while (1)
230 {
231 int opt;
232
c34b6b57 233#ifdef HAVE_NETLINK
c065230a 234 opt = getopt_long (argc, argv, "bdklf:i:hA:P:ru:g:vs:", longopts, 0);
c34b6b57 235#else
c065230a 236 opt = getopt_long (argc, argv, "bdklf:i:hA:P:ru:g:v", longopts, 0);
c34b6b57 237#endif /* HAVE_NETLINK */
718e3744 238
239 if (opt == EOF)
240 break;
241
242 switch (opt)
243 {
244 case 0:
245 break;
246 case 'b':
247 batch_mode = 1;
248 case 'd':
249 daemon_mode = 1;
250 break;
251 case 'k':
252 keep_kernel_mode = 1;
253 break;
254 case 'l':
255 /* log_mode = 1; */
256 break;
257 case 'f':
258 config_file = optarg;
259 break;
260 case 'A':
261 vty_addr = optarg;
262 break;
263 case 'i':
264 pid_file = optarg;
265 break;
266 case 'P':
4fc4e7ab 267 /* Deal with atoi() returning 0 on failure, and zebra not
268 listening on zebra port... */
269 if (strcmp(optarg, "0") == 0)
270 {
271 vty_port = 0;
272 break;
273 }
718e3744 274 vty_port = atoi (optarg);
4fc4e7ab 275 vty_port = (vty_port ? vty_port : ZEBRA_VTY_PORT);
718e3744 276 break;
277 case 'r':
278 retain_mode = 1;
279 break;
c34b6b57 280#ifdef HAVE_NETLINK
281 case 's':
282 nl_rcvbufsize = atoi (optarg);
283 break;
284#endif /* HAVE_NETLINK */
c065230a 285 case 'u':
286 zserv_privs.user = optarg;
287 break;
288 case 'g':
289 zserv_privs.group = optarg;
290 break;
718e3744 291 case 'v':
292 print_version (progname);
293 exit (0);
294 break;
295 case 'h':
296 usage (progname, 0);
297 break;
298 default:
299 usage (progname, 1);
300 break;
301 }
302 }
303
304 /* Make master thread emulator. */
b21b19c5 305 zebrad.master = thread_master_create ();
718e3744 306
edd7c245 307 /* privs initialise */
308 zprivs_init (&zserv_privs);
309
718e3744 310 /* Vty related initialize. */
2d75d052 311 signal_init (zebrad.master, Q_SIGC(zebra_signals), zebra_signals);
718e3744 312 cmd_init (1);
b21b19c5 313 vty_init (zebrad.master);
718e3744 314 memory_init ();
315
316 /* Zebra related initialize. */
317 zebra_init ();
318 rib_init ();
319 zebra_if_init ();
320 zebra_debug_init ();
18a6dce6 321 router_id_init();
718e3744 322 zebra_vty_init ();
323 access_list_init ();
324 rtadv_init ();
ca776988 325#ifdef HAVE_IRDP
326 irdp_init();
327#endif
718e3744 328
329 /* For debug purpose. */
330 /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */
331
332 /* Make kernel routing socket. */
333 kernel_init ();
334 interface_list ();
335 route_read ();
336
337 /* Sort VTY commands. */
338 sort_node ();
339
340#ifdef HAVE_SNMP
341 zebra_snmp_init ();
342#endif /* HAVE_SNMP */
343
344 /* Clean up self inserted route. */
345 if (! keep_kernel_mode)
346 rib_sweep_route ();
347
348 /* Configuration file read*/
320ec10a 349 vty_read_config (config_file, config_default);
718e3744 350
351 /* Clean up rib. */
352 rib_weed_tables ();
353
354 /* Exit when zebra is working in batch mode. */
355 if (batch_mode)
356 exit (0);
357
358 /* Needed for BSD routing socket. */
359 old_pid = getpid ();
360
361 /* Daemonize. */
362 if (daemon_mode)
363 daemon (0, 0);
364
365 /* Output pid of zebra. */
366 pid_output (pid_file);
367
368 /* Needed for BSD routing socket. */
369 pid = getpid ();
370
371 /* Make vty server socket. */
4fc4e7ab 372 vty_serv_sock (vty_addr, vty_port, ZEBRA_VTYSH_PATH);
718e3744 373
887c44a4 374 /* Print banner. */
375 zlog_notice ("Zebra %s starting: vty@%d", QUAGGA_VERSION, vty_port);
376
b21b19c5 377 while (thread_fetch (zebrad.master, &thread))
718e3744 378 thread_call (&thread);
379
380 /* Not reached... */
381 exit (0);
382}