1 /* zebra daemon main routine.
2 * Copyright (C) 1997, 98 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
23 #include <lib/version.h>
29 #include "zebra_memory.h"
30 #include "memory_vty.h"
37 #include "logicalrouter.h"
40 #include "frr_pthread.h"
42 #include "zebra/zebra_router.h"
43 #include "zebra/zebra_errors.h"
44 #include "zebra/rib.h"
45 #include "zebra/zserv.h"
46 #include "zebra/debug.h"
47 #include "zebra/router-id.h"
48 #include "zebra/irdp.h"
49 #include "zebra/rtadv.h"
50 #include "zebra/zebra_ptm.h"
51 #include "zebra/zebra_ns.h"
52 #include "zebra/redistribute.h"
53 #include "zebra/zebra_mpls.h"
54 #include "zebra/label_manager.h"
55 #include "zebra/zebra_netns_notify.h"
56 #include "zebra/zebra_rnh.h"
57 #include "zebra/zebra_pbr.h"
59 #if defined(HANDLE_NETLINK_FUZZING)
60 #include "zebra/kernel_netlink.h"
61 #endif /* HANDLE_NETLINK_FUZZING */
63 #define ZEBRA_PTM_SUPPORT
66 struct zebra_t zebrad
= {
67 .rtm_table_default
= 0,
68 .packets_to_process
= ZEBRA_ZAPI_PACKETS_TO_PROCESS
,
74 /* Pacify zclient.o in libfrr, which expects this variable. */
75 struct thread_master
*master
;
77 /* Route retain mode flag. */
80 /* Allow non-quagga entities to delete quagga routes */
83 /* Don't delete kernel route. */
84 int keep_kernel_mode
= 0;
86 bool v6_rr_semantics
= false;
89 /* Receive buffer size for netlink socket */
90 uint32_t nl_rcvbufsize
= 4194304;
91 #endif /* HAVE_NETLINK */
93 #define OPTION_V6_RR_SEMANTICS 2000
94 /* Command line options. */
95 struct option longopts
[] = {
96 {"batch", no_argument
, NULL
, 'b'},
97 {"allow_delete", no_argument
, NULL
, 'a'},
98 {"keep_kernel", no_argument
, NULL
, 'k'},
99 {"socket", required_argument
, NULL
, 'z'},
100 {"ecmp", required_argument
, NULL
, 'e'},
101 {"label_socket", no_argument
, NULL
, 'l'},
102 {"retain", no_argument
, NULL
, 'r'},
103 {"vrfdefaultname", required_argument
, NULL
, 'o'},
105 {"vrfwnetns", no_argument
, NULL
, 'n'},
106 {"nl-bufsize", required_argument
, NULL
, 's'},
107 {"v6-rr-semantics", no_argument
, NULL
, OPTION_V6_RR_SEMANTICS
},
108 #endif /* HAVE_NETLINK */
111 zebra_capabilities_t _caps_p
[] = {
112 ZCAP_NET_ADMIN
, ZCAP_SYS_ADMIN
, ZCAP_NET_RAW
,
115 /* zebra privileges to run with */
116 struct zebra_privs_t zserv_privs
= {
117 #if defined(FRR_USER) && defined(FRR_GROUP)
122 .vty_group
= VTY_GROUP
,
125 .cap_num_p
= array_size(_caps_p
),
128 unsigned int multipath_num
= MULTIPATH_NUM
;
130 /* SIGHUP handler. */
131 static void sighup(void)
133 zlog_info("SIGHUP received");
135 /* Reload of config file. */
139 /* SIGINT handler. */
140 static void sigint(void)
143 struct zebra_vrf
*zvrf
;
144 struct listnode
*ln
, *nn
;
145 struct zserv
*client
;
147 zlog_notice("Terminating on signal");
151 for (ALL_LIST_ELEMENTS(zebrad
.client_list
, ln
, nn
, client
))
152 zserv_close_client(client
);
154 list_delete_all_node(zebrad
.client_list
);
158 RB_FOREACH (vrf
, vrf_name_head
, &vrfs_by_name
) {
161 SET_FLAG(zvrf
->flags
, ZEBRA_VRF_RETAIN
);
163 if (zebrad
.lsp_process_q
)
164 work_queue_free_and_null(&zebrad
.lsp_process_q
);
167 ns_walk_func(zebra_ns_disabled
);
168 zebra_ns_notify_close();
174 list_delete(&zebrad
.client_list
);
175 work_queue_free_and_null(&zebrad
.ribq
);
176 meta_queue_free(zebrad
.mq
);
178 zebra_router_terminate();
184 /* SIGUSR1 handler. */
185 static void sigusr1(void)
190 struct quagga_signal_t zebra_signals
[] = {
210 zebra
, ZEBRA
, .vty_port
= ZEBRA_VTY_PORT
, .flags
= FRR_NO_ZCLIENT
,
213 "Daemon which manages kernel routing table management "
214 "and\nredistribution between different routing protocols.",
216 .signals
= zebra_signals
, .n_signals
= array_size(zebra_signals
),
218 .privs
= &zserv_privs
, )
220 /* Main startup routine. */
221 int main(int argc
, char **argv
)
223 // int batch_mode = 0;
224 char *zserv_path
= NULL
;
225 /* Socket to external label manager */
226 char *lblmgr_path
= NULL
;
227 struct sockaddr_storage dummy
;
229 #if defined(HANDLE_ZAPI_FUZZING)
230 char *zapi_fuzzing
= NULL
;
231 #endif /* HANDLE_ZAPI_FUZZING */
232 #if defined(HANDLE_NETLINK_FUZZING)
233 char *netlink_fuzzing
= NULL
;
234 #endif /* HANDLE_NETLINK_FUZZING */
236 vrf_configure_backend(VRF_BACKEND_VRF_LITE
);
237 logicalrouter_configure_backend(LOGICALROUTER_BACKEND_NETNS
);
239 frr_preinit(&zebra_di
, argc
, argv
);
246 #if defined(HANDLE_ZAPI_FUZZING)
248 #endif /* HANDLE_ZAPI_FUZZING */
249 #if defined(HANDLE_NETLINK_FUZZING)
251 #endif /* HANDLE_NETLINK_FUZZING */
254 " -b, --batch Runs in batch mode\n"
255 " -a, --allow_delete Allow other processes to delete zebra routes\n"
256 " -z, --socket Set path of zebra socket\n"
257 " -e, --ecmp Specify ECMP to use.\n"
258 " -l, --label_socket Socket to external label manager\n"
259 " -k, --keep_kernel Don't delete old routes which were installed by zebra.\n"
260 " -r, --retain When program terminates, retain added route by zebra.\n"
261 " -o, --vrfdefaultname Set default VRF name.\n"
263 " -n, --vrfwnetns Use NetNS as VRF backend\n"
264 " -s, --nl-bufsize Set netlink receive buffer size\n"
265 " --v6-rr-semantics Use v6 RR semantics\n"
266 #endif /* HAVE_NETLINK */
267 #if defined(HANDLE_ZAPI_FUZZING)
268 " -c <file> Bypass normal startup and use this file for testing of zapi\n"
269 #endif /* HANDLE_ZAPI_FUZZING */
270 #if defined(HANDLE_NETLINK_FUZZING)
271 " -w <file> Bypass normal startup and use this file for testing of netlink input\n"
272 #endif /* HANDLE_NETLINK_FUZZING */
276 int opt
= frr_getopt(argc
, argv
, NULL
);
291 keep_kernel_mode
= 1;
294 multipath_num
= atoi(optarg
);
295 if (multipath_num
> MULTIPATH_NUM
296 || multipath_num
<= 0) {
298 EC_ZEBRA_BAD_MULTIPATH_NUM
,
299 "Multipath Number specified must be less than %d and greater than 0",
305 vrf_set_default_name(optarg
);
309 if (!frr_zclient_addr(&dummy
, &dummylen
, optarg
)) {
311 "Invalid zserv socket path: %s\n",
317 lblmgr_path
= optarg
;
324 nl_rcvbufsize
= atoi(optarg
);
327 vrf_configure_backend(VRF_BACKEND_NETNS
);
328 logicalrouter_configure_backend(
329 LOGICALROUTER_BACKEND_OFF
);
331 case OPTION_V6_RR_SEMANTICS
:
332 v6_rr_semantics
= true;
334 #endif /* HAVE_NETLINK */
335 #if defined(HANDLE_ZAPI_FUZZING)
337 zapi_fuzzing
= optarg
;
339 #endif /* HANDLE_ZAPI_FUZZING */
340 #if defined(HANDLE_NETLINK_FUZZING)
342 netlink_fuzzing
= optarg
;
343 /* This ensures we are aren't writing any of the
344 * startup netlink messages that happen when we
349 #endif /* HANDLE_NETLINK_FUZZING */
356 vty_config_lockless();
357 zebrad
.master
= frr_init();
359 /* Zebra related initialize. */
365 router_id_cmd_init();
368 * Initialize NS( and implicitly the VRF module), and make kernel
375 #if defined(HAVE_RTADV)
379 #ifdef ZEBRA_PTM_SUPPORT
384 zebra_mpls_vty_init();
388 /* For debug purpose. */
389 /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */
391 /* Process the configuration file. Among other configuration
392 * directives we can meet those installing static routes. Such
393 * requests will not be executed immediately, but queued in
394 * zebra->ribq structure until we enter the main execution loop.
395 * The notifications from kernel will show originating PID equal
396 * to that after daemon() completes (if ever called).
400 /* After we have successfully acquired the pidfile, we can be sure
401 * about being the only copy of zebra process, which is submitting
402 * changes to the FIB.
403 * Clean up zebra-originated routes. The requests will be sent to OS
404 * immediately, so originating PID in notifications from kernel
405 * will be equal to the current getpid(). To know about such routes,
406 * we have to have route_read() called before.
408 if (!keep_kernel_mode
)
411 /* Needed for BSD routing socket. */
414 /* Intialize pthread library */
417 /* Start Zebra API server */
418 zserv_start(zserv_path
);
420 /* Init label manager */
421 label_manager_init(lblmgr_path
);
429 #if defined(HANDLE_ZAPI_FUZZING)
431 zserv_read_file(zapi_fuzzing
);
434 #endif /* HANDLE_ZAPI_FUZZING */
435 #if defined(HANDLE_NETLINK_FUZZING)
436 if (netlink_fuzzing
) {
437 netlink_read_init(netlink_fuzzing
);
440 #endif /* HANDLE_NETLINK_FUZZING */
443 frr_run(zebrad
.master
);