1 /* Main routine of bgpd.
2 * Copyright (C) 1996, 97, 98, 1999 Kunihiro Ishiguro
4 * This file is part of GNU Zebra.
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
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.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
28 #include <lib/version.h>
30 #include "memory_vty.h"
46 #include "bgpd/bgpd.h"
47 #include "bgpd/bgp_attr.h"
48 #include "bgpd/bgp_route.h"
49 #include "bgpd/bgp_mplsvpn.h"
50 #include "bgpd/bgp_aspath.h"
51 #include "bgpd/bgp_dump.h"
52 #include "bgpd/bgp_route.h"
53 #include "bgpd/bgp_nexthop.h"
54 #include "bgpd/bgp_regex.h"
55 #include "bgpd/bgp_clist.h"
56 #include "bgpd/bgp_debug.h"
57 #include "bgpd/bgp_errors.h"
58 #include "bgpd/bgp_filter.h"
59 #include "bgpd/bgp_zebra.h"
60 #include "bgpd/bgp_packet.h"
61 #include "bgpd/bgp_keepalives.h"
62 #include "bgpd/bgp_network.h"
63 #include "bgpd/bgp_errors.h"
66 #include "bgpd/rfapi/rfapi_backend.h"
69 /* bgpd options, we use GNU getopt library. */
70 static const struct option longopts
[] = {
71 {"bgp_port", required_argument
, NULL
, 'p'},
72 {"listenon", required_argument
, NULL
, 'l'},
73 #if CONFDATE > 20190521
74 CPP_NOTICE("-r / --retain has reached deprecation EOL, remove")
76 {"retain", no_argument
, NULL
, 'r'},
77 {"no_kernel", no_argument
, NULL
, 'n'},
78 {"skip_runas", no_argument
, NULL
, 'S'},
79 {"ecmp", required_argument
, NULL
, 'e'},
80 {"int_num", required_argument
, NULL
, 'I'},
83 /* signal definitions */
88 static void bgp_exit(int);
89 static void bgp_vrf_terminate(void);
91 static struct quagga_signal_t bgp_signals
[] = {
111 static zebra_capabilities_t _caps_p
[] = {ZCAP_BIND
, ZCAP_NET_RAW
,
112 ZCAP_NET_ADMIN
, ZCAP_SYS_ADMIN
};
114 struct zebra_privs_t bgpd_privs
= {
115 #if defined(FRR_USER) && defined(FRR_GROUP)
120 .vty_group
= VTY_GROUP
,
123 .cap_num_p
= array_size(_caps_p
),
127 static struct frr_daemon_info bgpd_di
;
129 /* SIGHUP handler. */
132 zlog_info("SIGHUP received");
134 /* Terminate all thread. */
137 zlog_info("bgpd restarting!");
139 /* Reload config file. */
140 vty_read_config(NULL
, bgpd_di
.config_file
, config_default
);
142 /* Try to return to normal operation. */
145 /* SIGINT handler. */
146 __attribute__((__noreturn__
)) void sigint(void)
148 zlog_notice("Terminating on signal");
149 assert(bm
->terminating
== false);
150 bm
->terminating
= true; /* global flag that shutting down */
159 /* SIGUSR1 handler. */
166 Try to free up allocations we know about so that diagnostic tools such as
167 valgrind are able to better illuminate leaks.
169 Zebra route removal and protocol teardown are not meant to be done here.
170 For example, "retain_mode" may be set.
172 static __attribute__((__noreturn__
)) void bgp_exit(int status
)
174 struct bgp
*bgp
, *bgp_default
;
175 struct listnode
*node
, *nnode
;
177 /* it only makes sense for this to be called on a clean exit */
186 bgp_default
= bgp_get_default();
188 /* reverse bgp_master_init */
189 for (ALL_LIST_ELEMENTS(bm
->bgp
, node
, nnode
, bgp
)) {
190 if (bgp_default
== bgp
)
195 bgp_delete(bgp_default
);
197 /* reverse bgp_dump_init */
200 /* reverse bgp_route_init */
203 /* cleanup route maps */
204 bgp_route_map_terminate();
206 /* reverse bgp_attr_init */
210 bgp_pthreads_finish();
212 /* reverse access_list_init */
213 access_list_add_hook(NULL
);
214 access_list_delete_hook(NULL
);
217 /* reverse bgp_filter_init */
218 as_list_add_hook(NULL
);
219 as_list_delete_hook(NULL
);
222 /* reverse prefix_list_init */
223 prefix_list_add_hook(NULL
);
224 prefix_list_delete_hook(NULL
);
227 /* reverse community_list_init */
228 community_list_terminate(bgp_clist
);
236 bf_free(bm
->rd_idspace
);
237 list_delete(&bm
->bgp
);
241 memset(bm
, 0, sizeof(*bm
));
247 static int bgp_vrf_new(struct vrf
*vrf
)
249 if (BGP_DEBUG(zebra
, ZEBRA
))
250 zlog_debug("VRF Created: %s(%u)", vrf
->name
, vrf
->vrf_id
);
255 static int bgp_vrf_delete(struct vrf
*vrf
)
257 if (BGP_DEBUG(zebra
, ZEBRA
))
258 zlog_debug("VRF Deletion: %s(%u)", vrf
->name
, vrf
->vrf_id
);
263 static int bgp_vrf_enable(struct vrf
*vrf
)
268 if (BGP_DEBUG(zebra
, ZEBRA
))
269 zlog_debug("VRF enable add %s id %u", vrf
->name
, vrf
->vrf_id
);
271 bgp
= bgp_lookup_by_name(vrf
->name
);
273 if (bgp
->name
&& strmatch(vrf
->name
, VRF_DEFAULT_NAME
)) {
274 XFREE(MTYPE_BGP
, bgp
->name
);
276 XFREE(MTYPE_BGP
, bgp
->name_pretty
);
277 bgp
->name_pretty
= XSTRDUP(MTYPE_BGP
, "VRF default");
279 old_vrf_id
= bgp
->vrf_id
;
280 /* We have instance configured, link to VRF and make it "up". */
281 bgp_vrf_link(bgp
, vrf
);
283 bgp_handle_socket(bgp
, vrf
, old_vrf_id
, true);
284 /* Update any redistribute vrf bitmaps if the vrf_id changed */
285 if (old_vrf_id
!= bgp
->vrf_id
)
286 bgp_update_redist_vrf_bitmaps(bgp
, old_vrf_id
);
287 bgp_instance_up(bgp
);
288 vpn_leak_zebra_vrf_label_update(bgp
, AFI_IP
);
289 vpn_leak_zebra_vrf_label_update(bgp
, AFI_IP6
);
290 vpn_leak_postchange(BGP_VPN_POLICY_DIR_TOVPN
, AFI_IP
,
291 bgp_get_default(), bgp
);
292 vpn_leak_postchange(BGP_VPN_POLICY_DIR_FROMVPN
, AFI_IP
,
293 bgp_get_default(), bgp
);
294 vpn_leak_postchange(BGP_VPN_POLICY_DIR_TOVPN
, AFI_IP6
,
295 bgp_get_default(), bgp
);
296 vpn_leak_postchange(BGP_VPN_POLICY_DIR_FROMVPN
, AFI_IP6
,
297 bgp_get_default(), bgp
);
303 static int bgp_vrf_disable(struct vrf
*vrf
)
308 if (vrf
->vrf_id
== VRF_DEFAULT
)
311 if (BGP_DEBUG(zebra
, ZEBRA
))
312 zlog_debug("VRF disable %s id %d", vrf
->name
, vrf
->vrf_id
);
314 bgp
= bgp_lookup_by_name(vrf
->name
);
317 vpn_leak_zebra_vrf_label_withdraw(bgp
, AFI_IP
);
318 vpn_leak_zebra_vrf_label_withdraw(bgp
, AFI_IP6
);
319 vpn_leak_prechange(BGP_VPN_POLICY_DIR_TOVPN
, AFI_IP
,
320 bgp_get_default(), bgp
);
321 vpn_leak_prechange(BGP_VPN_POLICY_DIR_FROMVPN
, AFI_IP
,
322 bgp_get_default(), bgp
);
323 vpn_leak_prechange(BGP_VPN_POLICY_DIR_TOVPN
, AFI_IP6
,
324 bgp_get_default(), bgp
);
325 vpn_leak_prechange(BGP_VPN_POLICY_DIR_FROMVPN
, AFI_IP6
,
326 bgp_get_default(), bgp
);
328 old_vrf_id
= bgp
->vrf_id
;
329 bgp_handle_socket(bgp
, vrf
, VRF_UNKNOWN
, false);
330 /* We have instance configured, unlink from VRF and make it
332 bgp_vrf_unlink(bgp
, vrf
);
333 /* Update any redistribute vrf bitmaps if the vrf_id changed */
334 if (old_vrf_id
!= bgp
->vrf_id
)
335 bgp_update_redist_vrf_bitmaps(bgp
, old_vrf_id
);
336 bgp_instance_down(bgp
);
339 /* Note: This is a callback, the VRF will be deleted by the caller. */
343 static void bgp_vrf_init(void)
345 vrf_init(bgp_vrf_new
, bgp_vrf_enable
, bgp_vrf_disable
,
346 bgp_vrf_delete
, NULL
);
349 static void bgp_vrf_terminate(void)
354 static const struct frr_yang_module_info
*bgpd_yang_modules
[] = {
357 FRR_DAEMON_INFO(bgpd
, BGP
, .vty_port
= BGP_VTY_PORT
,
359 .proghelp
= "Implementation of the BGP routing protocol.",
361 .signals
= bgp_signals
, .n_signals
= array_size(bgp_signals
),
363 .privs
= &bgpd_privs
, .yang_modules
= bgpd_yang_modules
,
364 .n_yang_modules
= array_size(bgpd_yang_modules
), )
366 #if CONFDATE > 20190521
367 CPP_NOTICE("-r / --retain has reached deprecation EOL, remove")
369 #define DEPRECATED_OPTIONS "r"
371 /* Main routine of bgpd. Treatment of argument and start bgp finite
372 state machine is handled at here. */
373 int main(int argc
, char **argv
)
378 int bgp_port
= BGP_PORT_DEFAULT
;
379 char *bgp_address
= NULL
;
381 int no_zebra_flag
= 0;
385 frr_preinit(&bgpd_di
, argc
, argv
);
387 "p:l:Sne:I:" DEPRECATED_OPTIONS
, longopts
,
388 " -p, --bgp_port Set BGP listen port number (0 means do not listen).\n"
389 " -l, --listenon Listen on specified address (implies -n)\n"
390 " -n, --no_kernel Do not install route to kernel.\n"
391 " -Z, --no_zebra Do not communicate with Zebra.\n"
392 " -S, --skip_runas Skip capabilities checks, and changing user and group IDs.\n"
393 " -e, --ecmp Specify ECMP to use.\n"
394 " -I, --int_num Set instance number (label-manager)\n");
396 /* Command line argument treatment. */
398 opt
= frr_getopt(argc
, argv
, 0);
400 if (opt
&& opt
< 128 && strchr(DEPRECATED_OPTIONS
, opt
)) {
402 "The -%c option no longer exists.\nPlease refer to the manual.\n",
414 tmp_port
= atoi(optarg
);
415 if (tmp_port
< 0 || tmp_port
> 0xffff)
416 bgp_port
= BGP_PORT_DEFAULT
;
421 multipath_num
= atoi(optarg
);
422 if (multipath_num
> MULTIPATH_NUM
423 || multipath_num
<= 0) {
426 "Multipath Number specified must be less than %d and greater than 0",
432 bgp_address
= optarg
;
433 /* listenon implies -n */
445 instance
= atoi(optarg
);
446 if (instance
> (unsigned short)-1)
447 zlog_err("Instance %i out of range (0..%u)",
448 instance
, (unsigned short)-1);
456 memset(&bgpd_privs
, 0, sizeof(bgpd_privs
));
458 /* BGP master init. */
459 bgp_master_init(frr_init());
462 bgp_option_set(BGP_OPT_NO_LISTEN
);
463 bm
->address
= bgp_address
;
464 if (no_fib_flag
|| no_zebra_flag
)
465 bgp_option_set(BGP_OPT_NO_FIB
);
467 bgp_option_set(BGP_OPT_NO_ZEBRA
);
469 /* Initializations. */
472 /* BGP related initialization. */
473 bgp_init((unsigned short)instance
);
475 snprintf(bgpd_di
.startinfo
, sizeof(bgpd_di
.startinfo
), ", bgp@%s:%d",
476 (bm
->address
? bm
->address
: "<all>"), bm
->port
);
479 /* must be called after fork() */