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1 | // SPDX-License-Identifier: GPL-2.0-or-later | |
2 | /* | |
3 | * IS-IS Rout(e)ing protocol - isis_main.c | |
4 | * | |
5 | * Copyright (C) 2001,2002 Sampo Saaristo | |
6 | * Tampere University of Technology | |
7 | * Institute of Communications Engineering | |
8 | */ | |
9 | ||
10 | #include <zebra.h> | |
11 | ||
12 | #include "getopt.h" | |
13 | #include "thread.h" | |
14 | #include "log.h" | |
15 | #include <lib/version.h> | |
16 | #include "command.h" | |
17 | #include "vty.h" | |
18 | #include "memory.h" | |
19 | #include "stream.h" | |
20 | #include "if.h" | |
21 | #include "privs.h" | |
22 | #include "sigevent.h" | |
23 | #include "filter.h" | |
24 | #include "plist.h" | |
25 | #include "zclient.h" | |
26 | #include "vrf.h" | |
27 | #include "qobj.h" | |
28 | #include "libfrr.h" | |
29 | #include "routemap.h" | |
30 | #include "affinitymap.h" | |
31 | ||
32 | #include "isisd/isis_constants.h" | |
33 | #include "isisd/isis_common.h" | |
34 | #include "isisd/isis_flags.h" | |
35 | #include "isisd/isis_circuit.h" | |
36 | #include "isisd/isisd.h" | |
37 | #include "isisd/isis_dynhn.h" | |
38 | #include "isisd/isis_spf.h" | |
39 | #include "isisd/isis_route.h" | |
40 | #include "isisd/isis_routemap.h" | |
41 | #include "isisd/isis_zebra.h" | |
42 | #include "isisd/isis_te.h" | |
43 | #include "isisd/isis_errors.h" | |
44 | #include "isisd/isis_bfd.h" | |
45 | #include "isisd/isis_lsp.h" | |
46 | #include "isisd/isis_mt.h" | |
47 | #include "isisd/fabricd.h" | |
48 | #include "isisd/isis_nb.h" | |
49 | #include "isisd/isis_ldp_sync.h" | |
50 | ||
51 | /* Default configuration file name */ | |
52 | #define ISISD_DEFAULT_CONFIG "isisd.conf" | |
53 | /* Default vty port */ | |
54 | #define ISISD_VTY_PORT 2608 | |
55 | #define FABRICD_VTY_PORT 2618 | |
56 | ||
57 | /* isisd privileges */ | |
58 | zebra_capabilities_t _caps_p[] = {ZCAP_NET_RAW, ZCAP_BIND, ZCAP_SYS_ADMIN}; | |
59 | ||
60 | struct zebra_privs_t isisd_privs = { | |
61 | #if defined(FRR_USER) | |
62 | .user = FRR_USER, | |
63 | #endif | |
64 | #if defined FRR_GROUP | |
65 | .group = FRR_GROUP, | |
66 | #endif | |
67 | #ifdef VTY_GROUP | |
68 | .vty_group = VTY_GROUP, | |
69 | #endif | |
70 | .caps_p = _caps_p, | |
71 | .cap_num_p = array_size(_caps_p), | |
72 | .cap_num_i = 0}; | |
73 | ||
74 | /* isisd options */ | |
75 | static const struct option longopts[] = { | |
76 | {"int_num", required_argument, NULL, 'I'}, | |
77 | {0}}; | |
78 | ||
79 | /* Master of threads. */ | |
80 | struct thread_master *master; | |
81 | ||
82 | /* | |
83 | * Prototypes. | |
84 | */ | |
85 | void sighup(void); | |
86 | void sigint(void); | |
87 | void sigterm(void); | |
88 | void sigusr1(void); | |
89 | ||
90 | ||
91 | static __attribute__((__noreturn__)) void terminate(int i) | |
92 | { | |
93 | isis_terminate(); | |
94 | isis_sr_term(); | |
95 | isis_zebra_stop(); | |
96 | exit(i); | |
97 | } | |
98 | ||
99 | /* | |
100 | * Signal handlers | |
101 | */ | |
102 | #ifdef FABRICD | |
103 | void sighup(void) | |
104 | { | |
105 | zlog_notice("SIGHUP/reload is not implemented for fabricd"); | |
106 | return; | |
107 | } | |
108 | #else | |
109 | static struct frr_daemon_info isisd_di; | |
110 | void sighup(void) | |
111 | { | |
112 | zlog_info("SIGHUP received"); | |
113 | ||
114 | /* Reload config file. */ | |
115 | vty_read_config(NULL, isisd_di.config_file, config_default); | |
116 | } | |
117 | ||
118 | #endif | |
119 | ||
120 | __attribute__((__noreturn__)) void sigint(void) | |
121 | { | |
122 | zlog_notice("Terminating on signal SIGINT"); | |
123 | terminate(0); | |
124 | } | |
125 | ||
126 | __attribute__((__noreturn__)) void sigterm(void) | |
127 | { | |
128 | zlog_notice("Terminating on signal SIGTERM"); | |
129 | terminate(0); | |
130 | } | |
131 | ||
132 | void sigusr1(void) | |
133 | { | |
134 | zlog_debug("SIGUSR1 received"); | |
135 | zlog_rotate(); | |
136 | } | |
137 | ||
138 | struct frr_signal_t isisd_signals[] = { | |
139 | { | |
140 | .signal = SIGHUP, | |
141 | .handler = &sighup, | |
142 | }, | |
143 | { | |
144 | .signal = SIGUSR1, | |
145 | .handler = &sigusr1, | |
146 | }, | |
147 | { | |
148 | .signal = SIGINT, | |
149 | .handler = &sigint, | |
150 | }, | |
151 | { | |
152 | .signal = SIGTERM, | |
153 | .handler = &sigterm, | |
154 | }, | |
155 | }; | |
156 | ||
157 | ||
158 | /* clang-format off */ | |
159 | static const struct frr_yang_module_info *const isisd_yang_modules[] = { | |
160 | &frr_filter_info, | |
161 | &frr_interface_info, | |
162 | #ifndef FABRICD | |
163 | &frr_isisd_info, | |
164 | #endif /* ifndef FABRICD */ | |
165 | &frr_route_map_info, | |
166 | &frr_affinity_map_info, | |
167 | &frr_vrf_info, | |
168 | }; | |
169 | /* clang-format on */ | |
170 | ||
171 | #ifdef FABRICD | |
172 | FRR_DAEMON_INFO(fabricd, OPEN_FABRIC, .vty_port = FABRICD_VTY_PORT, | |
173 | ||
174 | .proghelp = "Implementation of the OpenFabric routing protocol.", | |
175 | #else | |
176 | FRR_DAEMON_INFO(isisd, ISIS, .vty_port = ISISD_VTY_PORT, | |
177 | ||
178 | .proghelp = "Implementation of the IS-IS routing protocol.", | |
179 | #endif | |
180 | .copyright = | |
181 | "Copyright (c) 2001-2002 Sampo Saaristo, Ofer Wald and Hannes Gredler", | |
182 | ||
183 | .signals = isisd_signals, | |
184 | .n_signals = array_size(isisd_signals), | |
185 | ||
186 | .privs = &isisd_privs, .yang_modules = isisd_yang_modules, | |
187 | .n_yang_modules = array_size(isisd_yang_modules), | |
188 | ); | |
189 | ||
190 | /* | |
191 | * Main routine of isisd. Parse arguments and handle IS-IS state machine. | |
192 | */ | |
193 | int main(int argc, char **argv, char **envp) | |
194 | { | |
195 | int opt; | |
196 | int instance = 1; | |
197 | ||
198 | #ifdef FABRICD | |
199 | frr_preinit(&fabricd_di, argc, argv); | |
200 | #else | |
201 | frr_preinit(&isisd_di, argc, argv); | |
202 | #endif | |
203 | frr_opt_add( | |
204 | "I:", longopts, | |
205 | " -I, --int_num Set instance number (label-manager)\n"); | |
206 | ||
207 | /* Command line argument treatment. */ | |
208 | while (1) { | |
209 | opt = frr_getopt(argc, argv, NULL); | |
210 | ||
211 | if (opt == EOF) | |
212 | break; | |
213 | ||
214 | switch (opt) { | |
215 | case 0: | |
216 | break; | |
217 | case 'I': | |
218 | instance = atoi(optarg); | |
219 | if (instance < 1 || instance > (unsigned short)-1) | |
220 | zlog_err("Instance %i out of range (1..%u)", | |
221 | instance, (unsigned short)-1); | |
222 | break; | |
223 | default: | |
224 | frr_help_exit(1); | |
225 | } | |
226 | } | |
227 | ||
228 | /* thread master */ | |
229 | isis_master_init(frr_init()); | |
230 | master = im->master; | |
231 | /* | |
232 | * initializations | |
233 | */ | |
234 | isis_error_init(); | |
235 | access_list_init(); | |
236 | access_list_add_hook(isis_filter_update); | |
237 | access_list_delete_hook(isis_filter_update); | |
238 | isis_vrf_init(); | |
239 | prefix_list_init(); | |
240 | prefix_list_add_hook(isis_prefix_list_update); | |
241 | prefix_list_delete_hook(isis_prefix_list_update); | |
242 | isis_init(); | |
243 | isis_circuit_init(); | |
244 | #ifdef FABRICD | |
245 | isis_vty_daemon_init(); | |
246 | #endif /* FABRICD */ | |
247 | #ifndef FABRICD | |
248 | isis_cli_init(); | |
249 | #endif /* ifdef FABRICD */ | |
250 | isis_spf_init(); | |
251 | isis_redist_init(); | |
252 | isis_route_map_init(); | |
253 | isis_mpls_te_init(); | |
254 | isis_sr_init(); | |
255 | lsp_init(); | |
256 | mt_init(); | |
257 | ||
258 | affinity_map_init(); | |
259 | ||
260 | isis_zebra_init(master, instance); | |
261 | isis_bfd_init(master); | |
262 | isis_ldp_sync_init(); | |
263 | fabricd_init(); | |
264 | ||
265 | frr_config_fork(); | |
266 | frr_run(master); | |
267 | ||
268 | /* Not reached. */ | |
269 | exit(0); | |
270 | } |