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"
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_filter.h"
57 #include "bgpd/bgp_zebra.h"
58 #include "bgpd/bgp_packet.h"
59 #include "bgpd/bgp_keepalives.h"
62 #include "bgpd/rfapi/rfapi_backend.h"
65 /* bgpd options, we use GNU getopt library. */
66 static const struct option longopts
[] = {
67 {"bgp_port", required_argument
, NULL
, 'p'},
68 {"listenon", required_argument
, NULL
, 'l'},
69 {"retain", no_argument
, NULL
, 'r'},
70 {"no_kernel", no_argument
, NULL
, 'n'},
71 {"skip_runas", no_argument
, NULL
, 'S'},
72 {"ecmp", required_argument
, NULL
, 'e'},
75 /* signal definitions */
80 static void bgp_exit(int);
81 static void bgp_vrf_terminate(void);
83 static struct quagga_signal_t bgp_signals
[] = {
102 /* Route retain mode flag. */
103 static int retain_mode
= 0;
106 static zebra_capabilities_t _caps_p
[] = {
107 ZCAP_BIND
, ZCAP_NET_RAW
, ZCAP_NET_ADMIN
,
110 struct zebra_privs_t bgpd_privs
= {
111 #if defined(FRR_USER) && defined(FRR_GROUP)
116 .vty_group
= VTY_GROUP
,
119 .cap_num_p
= array_size(_caps_p
),
123 static struct frr_daemon_info bgpd_di
;
125 /* SIGHUP handler. */
128 zlog_info("SIGHUP received");
130 /* Terminate all thread. */
133 zlog_info("bgpd restarting!");
135 /* Reload config file. */
136 vty_read_config(bgpd_di
.config_file
, config_default
);
138 /* Try to return to normal operation. */
141 /* SIGINT handler. */
142 __attribute__((__noreturn__
)) void sigint(void)
144 zlog_notice("Terminating on signal");
154 /* SIGUSR1 handler. */
161 Try to free up allocations we know about so that diagnostic tools such as
162 valgrind are able to better illuminate leaks.
164 Zebra route removal and protocol teardown are not meant to be done here.
165 For example, "retain_mode" may be set.
167 static __attribute__((__noreturn__
)) void bgp_exit(int status
)
170 struct listnode
*node
, *nnode
;
172 /* it only makes sense for this to be called on a clean exit */
181 /* reverse bgp_master_init */
182 for (ALL_LIST_ELEMENTS(bm
->bgp
, node
, nnode
, bgp
))
185 /* reverse bgp_dump_init */
188 /* reverse bgp_route_init */
191 /* cleanup route maps */
192 bgp_route_map_terminate();
194 /* reverse bgp_attr_init */
198 bgp_pthreads_finish();
200 /* reverse access_list_init */
201 access_list_add_hook(NULL
);
202 access_list_delete_hook(NULL
);
205 /* reverse bgp_filter_init */
206 as_list_add_hook(NULL
);
207 as_list_delete_hook(NULL
);
210 /* reverse prefix_list_init */
211 prefix_list_add_hook(NULL
);
212 prefix_list_delete_hook(NULL
);
215 /* reverse community_list_init */
216 community_list_terminate(bgp_clist
);
224 bf_free(bm
->rd_idspace
);
225 list_delete_and_null(&bm
->bgp
);
226 memset(bm
, 0, sizeof(*bm
));
232 static int bgp_vrf_new(struct vrf
*vrf
)
234 if (BGP_DEBUG(zebra
, ZEBRA
))
235 zlog_debug("VRF Created: %s(%d)", vrf
->name
, vrf
->vrf_id
);
240 static int bgp_vrf_delete(struct vrf
*vrf
)
242 if (BGP_DEBUG(zebra
, ZEBRA
))
243 zlog_debug("VRF Deletion: %s(%d)", vrf
->name
, vrf
->vrf_id
);
248 static int bgp_vrf_enable(struct vrf
*vrf
)
253 if (BGP_DEBUG(zebra
, ZEBRA
))
254 zlog_debug("VRF enable add %s id %d", vrf
->name
, vrf
->vrf_id
);
256 bgp
= bgp_lookup_by_name(vrf
->name
);
258 old_vrf_id
= bgp
->vrf_id
;
259 /* We have instance configured, link to VRF and make it "up". */
260 bgp_vrf_link(bgp
, vrf
);
262 /* Update any redistribute vrf bitmaps if the vrf_id changed */
263 if (old_vrf_id
!= bgp
->vrf_id
)
264 bgp_update_redist_vrf_bitmaps(bgp
, old_vrf_id
);
265 bgp_instance_up(bgp
);
271 static int bgp_vrf_disable(struct vrf
*vrf
)
276 if (vrf
->vrf_id
== VRF_DEFAULT
)
279 if (BGP_DEBUG(zebra
, ZEBRA
))
280 zlog_debug("VRF disable %s id %d", vrf
->name
, vrf
->vrf_id
);
282 bgp
= bgp_lookup_by_name(vrf
->name
);
284 old_vrf_id
= bgp
->vrf_id
;
285 /* We have instance configured, unlink from VRF and make it
287 bgp_vrf_unlink(bgp
, vrf
);
288 /* Update any redistribute vrf bitmaps if the vrf_id changed */
289 if (old_vrf_id
!= bgp
->vrf_id
)
290 bgp_update_redist_vrf_bitmaps(bgp
, old_vrf_id
);
291 bgp_instance_down(bgp
);
294 /* Note: This is a callback, the VRF will be deleted by the caller. */
298 static void bgp_vrf_init(void)
300 vrf_init(bgp_vrf_new
, bgp_vrf_enable
, bgp_vrf_disable
, bgp_vrf_delete
);
303 static void bgp_vrf_terminate(void)
308 FRR_DAEMON_INFO(bgpd
, BGP
, .vty_port
= BGP_VTY_PORT
,
310 .proghelp
= "Implementation of the BGP routing protocol.",
312 .signals
= bgp_signals
, .n_signals
= array_size(bgp_signals
),
314 .privs
= &bgpd_privs
, )
316 /* Main routine of bgpd. Treatment of argument and start bgp finite
317 state machine is handled at here. */
318 int main(int argc
, char **argv
)
323 int bgp_port
= BGP_PORT_DEFAULT
;
324 char *bgp_address
= NULL
;
328 frr_preinit(&bgpd_di
, argc
, argv
);
330 "p:l:rSne:", longopts
,
331 " -p, --bgp_port Set bgp protocol's port number\n"
332 " -l, --listenon Listen on specified address (implies -n)\n"
333 " -r, --retain When program terminates, retain added route by bgpd.\n"
334 " -n, --no_kernel Do not install route to kernel.\n"
335 " -S, --skip_runas Skip capabilities checks, and changing user and group IDs.\n"
336 " -e, --ecmp Specify ECMP to use.\n");
338 /* Command line argument treatment. */
340 opt
= frr_getopt(argc
, argv
, 0);
349 tmp_port
= atoi(optarg
);
350 if (tmp_port
<= 0 || tmp_port
> 0xffff)
351 bgp_port
= BGP_PORT_DEFAULT
;
356 multipath_num
= atoi(optarg
);
357 if (multipath_num
> MULTIPATH_NUM
358 || multipath_num
<= 0) {
360 "Multipath Number specified must be less than %d and greater than 0",
369 bgp_address
= optarg
;
370 /* listenon implies -n */
384 memset(&bgpd_privs
, 0, sizeof(bgpd_privs
));
386 /* BGP master init. */
387 bgp_master_init(frr_init());
389 bm
->address
= bgp_address
;
391 bgp_option_set(BGP_OPT_NO_FIB
);
393 /* Initializations. */
396 /* BGP related initialization. */
399 snprintf(bgpd_di
.startinfo
, sizeof(bgpd_di
.startinfo
), ", bgp@%s:%d",
400 (bm
->address
? bm
->address
: "<all>"), bm
->port
);
403 /* must be called after fork() */