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>
45 #include "bgpd/bgpd.h"
46 #include "bgpd/bgp_attr.h"
47 #include "bgpd/bgp_route.h"
48 #include "bgpd/bgp_mplsvpn.h"
49 #include "bgpd/bgp_aspath.h"
50 #include "bgpd/bgp_dump.h"
51 #include "bgpd/bgp_route.h"
52 #include "bgpd/bgp_nexthop.h"
53 #include "bgpd/bgp_regex.h"
54 #include "bgpd/bgp_clist.h"
55 #include "bgpd/bgp_debug.h"
56 #include "bgpd/bgp_errors.h"
57 #include "bgpd/bgp_filter.h"
58 #include "bgpd/bgp_zebra.h"
59 #include "bgpd/bgp_packet.h"
60 #include "bgpd/bgp_keepalives.h"
61 #include "bgpd/bgp_network.h"
62 #include "bgpd/bgp_errors.h"
65 #include "bgpd/rfapi/rfapi_backend.h"
68 /* bgpd options, we use GNU getopt library. */
69 static const struct option longopts
[] = {
70 {"bgp_port", required_argument
, NULL
, 'p'},
71 {"listenon", required_argument
, NULL
, 'l'},
72 {"no_kernel", no_argument
, NULL
, 'n'},
73 {"skip_runas", no_argument
, NULL
, 'S'},
74 {"ecmp", required_argument
, NULL
, 'e'},
75 {"int_num", required_argument
, NULL
, 'I'},
76 {"no_zebra", no_argument
, NULL
, 'Z'},
77 {"socket_size", required_argument
, NULL
, 's'},
80 /* signal definitions */
85 static void bgp_exit(int);
86 static void bgp_vrf_terminate(void);
88 static struct quagga_signal_t bgp_signals
[] = {
108 static zebra_capabilities_t _caps_p
[] = {ZCAP_BIND
, ZCAP_NET_RAW
,
109 ZCAP_NET_ADMIN
, ZCAP_SYS_ADMIN
};
111 struct zebra_privs_t bgpd_privs
= {
112 #if defined(FRR_USER) && defined(FRR_GROUP)
117 .vty_group
= VTY_GROUP
,
120 .cap_num_p
= array_size(_caps_p
),
124 static struct frr_daemon_info bgpd_di
;
126 /* SIGHUP handler. */
129 zlog_info("SIGHUP received");
131 /* Terminate all thread. */
134 zlog_info("bgpd restarting!");
136 /* Reload config file. */
137 vty_read_config(NULL
, bgpd_di
.config_file
, config_default
);
139 /* Try to return to normal operation. */
142 /* SIGINT handler. */
143 __attribute__((__noreturn__
)) void sigint(void)
145 zlog_notice("Terminating on signal");
146 assert(bm
->terminating
== false);
147 bm
->terminating
= true; /* global flag that shutting down */
156 /* SIGUSR1 handler. */
163 Try to free up allocations we know about so that diagnostic tools such as
164 valgrind are able to better illuminate leaks.
166 Zebra route removal and protocol teardown are not meant to be done here.
167 For example, "retain_mode" may be set.
169 static __attribute__((__noreturn__
)) void bgp_exit(int status
)
171 struct bgp
*bgp
, *bgp_default
, *bgp_evpn
;
172 struct listnode
*node
, *nnode
;
174 /* it only makes sense for this to be called on a clean exit */
183 bgp_default
= bgp_get_default();
184 bgp_evpn
= bgp_get_evpn();
186 /* reverse bgp_master_init */
187 for (ALL_LIST_ELEMENTS(bm
->bgp
, node
, nnode
, bgp
)) {
188 if (bgp_default
== bgp
|| bgp_evpn
== bgp
)
192 if (bgp_evpn
&& bgp_evpn
!= bgp_default
)
193 bgp_delete(bgp_evpn
);
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
);
272 if (bgp
&& bgp
->vrf_id
!= vrf
->vrf_id
) {
273 if (bgp
->name
&& strmatch(vrf
->name
, VRF_DEFAULT_NAME
)) {
274 XFREE(MTYPE_BGP
, bgp
->name
);
275 XFREE(MTYPE_BGP
, bgp
->name_pretty
);
276 bgp
->name_pretty
= XSTRDUP(MTYPE_BGP
, "VRF default");
277 bgp
->inst_type
= BGP_INSTANCE_TYPE_DEFAULT
;
280 bgp
->rfapi
= bgp_rfapi_new(bgp
);
282 assert(bgp
->rfapi_cfg
);
284 #endif /* ENABLE_BGP_VNC */
286 old_vrf_id
= bgp
->vrf_id
;
287 /* We have instance configured, link to VRF and make it "up". */
288 bgp_vrf_link(bgp
, vrf
);
290 bgp_handle_socket(bgp
, vrf
, old_vrf_id
, true);
291 /* Update any redistribution if vrf_id changed */
292 if (old_vrf_id
!= bgp
->vrf_id
)
293 bgp_redistribute_redo(bgp
);
294 bgp_instance_up(bgp
);
295 vpn_leak_zebra_vrf_label_update(bgp
, AFI_IP
);
296 vpn_leak_zebra_vrf_label_update(bgp
, AFI_IP6
);
297 vpn_leak_postchange(BGP_VPN_POLICY_DIR_TOVPN
, AFI_IP
,
298 bgp_get_default(), bgp
);
299 vpn_leak_postchange(BGP_VPN_POLICY_DIR_FROMVPN
, AFI_IP
,
300 bgp_get_default(), bgp
);
301 vpn_leak_postchange(BGP_VPN_POLICY_DIR_TOVPN
, AFI_IP6
,
302 bgp_get_default(), bgp
);
303 vpn_leak_postchange(BGP_VPN_POLICY_DIR_FROMVPN
, AFI_IP6
,
304 bgp_get_default(), bgp
);
310 static int bgp_vrf_disable(struct vrf
*vrf
)
315 if (vrf
->vrf_id
== VRF_DEFAULT
)
318 if (BGP_DEBUG(zebra
, ZEBRA
))
319 zlog_debug("VRF disable %s id %d", vrf
->name
, vrf
->vrf_id
);
321 bgp
= bgp_lookup_by_name(vrf
->name
);
324 vpn_leak_zebra_vrf_label_withdraw(bgp
, AFI_IP
);
325 vpn_leak_zebra_vrf_label_withdraw(bgp
, AFI_IP6
);
326 vpn_leak_prechange(BGP_VPN_POLICY_DIR_TOVPN
, AFI_IP
,
327 bgp_get_default(), bgp
);
328 vpn_leak_prechange(BGP_VPN_POLICY_DIR_FROMVPN
, AFI_IP
,
329 bgp_get_default(), bgp
);
330 vpn_leak_prechange(BGP_VPN_POLICY_DIR_TOVPN
, AFI_IP6
,
331 bgp_get_default(), bgp
);
332 vpn_leak_prechange(BGP_VPN_POLICY_DIR_FROMVPN
, AFI_IP6
,
333 bgp_get_default(), bgp
);
335 old_vrf_id
= bgp
->vrf_id
;
336 bgp_handle_socket(bgp
, vrf
, VRF_UNKNOWN
, false);
337 /* We have instance configured, unlink from VRF and make it
339 bgp_vrf_unlink(bgp
, vrf
);
340 /* Delete any redistribute vrf bitmaps if the vrf_id changed */
341 if (old_vrf_id
!= bgp
->vrf_id
)
342 bgp_unset_redist_vrf_bitmaps(bgp
, old_vrf_id
);
343 bgp_instance_down(bgp
);
346 /* Note: This is a callback, the VRF will be deleted by the caller. */
350 static void bgp_vrf_init(void)
352 vrf_init(bgp_vrf_new
, bgp_vrf_enable
, bgp_vrf_disable
,
353 bgp_vrf_delete
, bgp_vrf_enable
);
356 static void bgp_vrf_terminate(void)
361 static const struct frr_yang_module_info
*const bgpd_yang_modules
[] = {
364 FRR_DAEMON_INFO(bgpd
, BGP
, .vty_port
= BGP_VTY_PORT
,
366 .proghelp
= "Implementation of the BGP routing protocol.",
368 .signals
= bgp_signals
, .n_signals
= array_size(bgp_signals
),
370 .privs
= &bgpd_privs
, .yang_modules
= bgpd_yang_modules
,
371 .n_yang_modules
= array_size(bgpd_yang_modules
), )
373 #define DEPRECATED_OPTIONS ""
375 /* Main routine of bgpd. Treatment of argument and start bgp finite
376 state machine is handled at here. */
377 int main(int argc
, char **argv
)
382 int bgp_port
= BGP_PORT_DEFAULT
;
383 char *bgp_address
= NULL
;
385 int no_zebra_flag
= 0;
388 int buffer_size
= BGP_SOCKET_SNDBUF_SIZE
;
390 frr_preinit(&bgpd_di
, argc
, argv
);
392 "p:l:SnZe:I:s:" DEPRECATED_OPTIONS
, longopts
,
393 " -p, --bgp_port Set BGP listen port number (0 means do not listen).\n"
394 " -l, --listenon Listen on specified address (implies -n)\n"
395 " -n, --no_kernel Do not install route to kernel.\n"
396 " -Z, --no_zebra Do not communicate with Zebra.\n"
397 " -S, --skip_runas Skip capabilities checks, and changing user and group IDs.\n"
398 " -e, --ecmp Specify ECMP to use.\n"
399 " -I, --int_num Set instance number (label-manager)\n"
400 " -s, --socket_size Set BGP peer socket send buffer size\n");
402 /* Command line argument treatment. */
404 opt
= frr_getopt(argc
, argv
, 0);
406 if (opt
&& opt
< 128 && strchr(DEPRECATED_OPTIONS
, opt
)) {
408 "The -%c option no longer exists.\nPlease refer to the manual.\n",
420 tmp_port
= atoi(optarg
);
421 if (tmp_port
< 0 || tmp_port
> 0xffff)
422 bgp_port
= BGP_PORT_DEFAULT
;
427 multipath_num
= atoi(optarg
);
428 if (multipath_num
> MULTIPATH_NUM
429 || multipath_num
<= 0) {
432 "Multipath Number specified must be less than %d and greater than 0",
438 bgp_address
= optarg
;
439 /* listenon implies -n */
451 instance
= atoi(optarg
);
452 if (instance
> (unsigned short)-1)
453 zlog_err("Instance %i out of range (0..%u)",
454 instance
, (unsigned short)-1);
457 buffer_size
= atoi(optarg
);
465 memset(&bgpd_privs
, 0, sizeof(bgpd_privs
));
467 /* BGP master init. */
468 bgp_master_init(frr_init(), buffer_size
);
471 bgp_option_set(BGP_OPT_NO_LISTEN
);
472 bm
->address
= bgp_address
;
473 if (no_fib_flag
|| no_zebra_flag
)
474 bgp_option_set(BGP_OPT_NO_FIB
);
476 bgp_option_set(BGP_OPT_NO_ZEBRA
);
478 /* Initializations. */
481 /* BGP related initialization. */
482 bgp_init((unsigned short)instance
);
484 snprintf(bgpd_di
.startinfo
, sizeof(bgpd_di
.startinfo
), ", bgp@%s:%d",
485 (bm
->address
? bm
->address
: "<all>"), bm
->port
);
488 /* must be called after fork() */
489 bgp_gr_apply_running_config();