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Commit | Line | Data |
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43c02e7b VB |
1 | /* |
2 | * Copyright (c) 2008 Vincent Bernat <bernat@luffy.cx> | |
3 | * | |
51434125 | 4 | * Permission to use, copy, modify, and/or distribute this software for any |
43c02e7b VB |
5 | * purpose with or without fee is hereby granted, provided that the above |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
17 | #include "lldpd.h" | |
18 | ||
19 | #include <stdio.h> | |
20 | #include <unistd.h> | |
21 | #include <errno.h> | |
22 | #include <signal.h> | |
23 | #include <sys/stat.h> | |
24 | #include <fcntl.h> | |
43c02e7b | 25 | #include <time.h> |
a2993d83 | 26 | #include <libgen.h> |
43c02e7b VB |
27 | #include <sys/utsname.h> |
28 | #include <sys/types.h> | |
c036b15d | 29 | #include <sys/wait.h> |
43c02e7b VB |
30 | #include <sys/socket.h> |
31 | #include <sys/select.h> | |
32 | #include <sys/time.h> | |
33 | #include <sys/ioctl.h> | |
34 | #include <arpa/inet.h> | |
43c02e7b | 35 | #include <net/if_arp.h> |
43c02e7b | 36 | |
bc598c23 VB |
37 | #if LLDPD_FD_SETSIZE != FD_SETSIZE |
38 | # warning "FD_SETSIZE is set to an inconsistent value." | |
39 | #endif | |
40 | ||
43c02e7b VB |
41 | #ifdef USE_SNMP |
42 | #include <net-snmp/net-snmp-config.h> | |
43 | #include <net-snmp/net-snmp-includes.h> | |
44 | #include <net-snmp/agent/net-snmp-agent-includes.h> | |
45 | #include <net-snmp/agent/snmp_vars.h> | |
46 | #endif /* USE_SNMP */ | |
47 | ||
8888d191 | 48 | static void usage(void); |
43c02e7b | 49 | |
8888d191 | 50 | static struct protocol protos[] = |
43c02e7b | 51 | { |
0c877af0 | 52 | { LLDPD_MODE_LLDP, 1, "LLDP", 'l', lldp_send, lldp_decode, NULL, |
f2dcb180 | 53 | LLDP_MULTICAST_ADDR }, |
4bad1937 | 54 | #ifdef ENABLE_CDP |
43c02e7b | 55 | { LLDPD_MODE_CDPV1, 0, "CDPv1", 'c', cdpv1_send, cdp_decode, cdpv1_guess, |
f2dcb180 | 56 | CDP_MULTICAST_ADDR }, |
43c02e7b | 57 | { LLDPD_MODE_CDPV2, 0, "CDPv2", 'c', cdpv2_send, cdp_decode, cdpv2_guess, |
f2dcb180 | 58 | CDP_MULTICAST_ADDR }, |
4bad1937 VB |
59 | #endif |
60 | #ifdef ENABLE_SONMP | |
43c02e7b | 61 | { LLDPD_MODE_SONMP, 0, "SONMP", 's', sonmp_send, sonmp_decode, NULL, |
f2dcb180 | 62 | SONMP_MULTICAST_ADDR }, |
4bad1937 VB |
63 | #endif |
64 | #ifdef ENABLE_EDP | |
43c02e7b | 65 | { LLDPD_MODE_EDP, 0, "EDP", 'e', edp_send, edp_decode, NULL, |
f2dcb180 | 66 | EDP_MULTICAST_ADDR }, |
4bad1937 VB |
67 | #endif |
68 | #ifdef ENABLE_FDP | |
031118c4 | 69 | { LLDPD_MODE_FDP, 0, "FDP", 'f', fdp_send, cdp_decode, NULL, |
f2dcb180 | 70 | FDP_MULTICAST_ADDR }, |
4bad1937 | 71 | #endif |
43c02e7b | 72 | { 0, 0, "any", ' ', NULL, NULL, NULL, |
f2dcb180 | 73 | {0,0,0,0,0,0} } |
43c02e7b VB |
74 | }; |
75 | ||
6e75df87 VB |
76 | static void lldpd_update_localchassis(struct lldpd *); |
77 | static void lldpd_update_localports(struct lldpd *); | |
78 | static void lldpd_cleanup(struct lldpd *); | |
8888d191 VB |
79 | static void lldpd_loop(struct lldpd *); |
80 | static void lldpd_shutdown(int); | |
6f1046d1 | 81 | static void lldpd_exit(void); |
8888d191 VB |
82 | static void lldpd_send_all(struct lldpd *); |
83 | static void lldpd_recv_all(struct lldpd *); | |
42b39485 | 84 | static void lldpd_hide_all(struct lldpd *); |
8482abe9 | 85 | static void lldpd_hide_ports(struct lldpd *, struct lldpd_hardware *, int); |
8888d191 VB |
86 | static int lldpd_guess_type(struct lldpd *, char *, int); |
87 | static void lldpd_decode(struct lldpd *, char *, int, | |
0bc32943 | 88 | struct lldpd_hardware *); |
16f910e1 VB |
89 | static void lldpd_update_chassis(struct lldpd_chassis *, |
90 | const struct lldpd_chassis *); | |
24f27a98 | 91 | static char *lldpd_get_lsb_release(void); |
ae87586a | 92 | static char *lldpd_get_os_release(void); |
89840df0 | 93 | #ifdef ENABLE_LLDPMED |
8888d191 | 94 | static void lldpd_med(struct lldpd_chassis *); |
89840df0 | 95 | #endif |
43c02e7b | 96 | |
8888d191 | 97 | static char **saved_argv; |
6bb9c4e0 VB |
98 | #ifdef HAVE___PROGNAME |
99 | extern const char *__progname; | |
100 | #else | |
101 | # define __progname "lldpd" | |
102 | #endif | |
43c02e7b | 103 | |
8888d191 | 104 | static void |
43c02e7b VB |
105 | usage(void) |
106 | { | |
53132616 VB |
107 | fprintf(stderr, "Usage: %s [OPTIONS ...]\n", __progname); |
108 | ||
109 | fprintf(stderr, "\n"); | |
110 | ||
111 | fprintf(stderr, "-d Do not daemonize.\n"); | |
5e64a80e | 112 | fprintf(stderr, "-r Receive-only mode\n"); |
53132616 VB |
113 | fprintf(stderr, "-i Disable LLDP-MED inventory TLV transmission.\n"); |
114 | fprintf(stderr, "-k Disable advertising of kernel release, version, machine.\n"); | |
fde7a7ce | 115 | fprintf(stderr, "-S descr Override the default system description.\n"); |
53132616 | 116 | fprintf(stderr, "-m IP Specify the management address of this system.\n"); |
42b39485 | 117 | fprintf(stderr, "-H mode Specify the behaviour when detecting multiple neighbors.\n"); |
8347587d | 118 | #ifdef ENABLE_LLDPMED |
53132616 VB |
119 | fprintf(stderr, "-M class Enable emission of LLDP-MED frame. 'class' should be one of:\n"); |
120 | fprintf(stderr, " 1 Generic Endpoint (Class I)\n"); | |
121 | fprintf(stderr, " 2 Media Endpoint (Class II)\n"); | |
122 | fprintf(stderr, " 3 Communication Device Endpoints (Class III)\n"); | |
123 | fprintf(stderr, " 4 Network Connectivity Device\n"); | |
8347587d VB |
124 | #endif |
125 | #ifdef USE_SNMP | |
53132616 | 126 | fprintf(stderr, "-x Enable SNMP subagent.\n"); |
53132616 VB |
127 | #endif |
128 | fprintf(stderr, "\n"); | |
129 | ||
8347587d VB |
130 | #if defined ENABLE_CDP || defined ENABLE_EDP || defined ENABLE_FDP || defined ENABLE_SONMP |
131 | fprintf(stderr, "Additional protocol support.\n"); | |
132 | #ifdef ENABLE_CDP | |
53132616 | 133 | fprintf(stderr, "-c Enable the support of CDP protocol. (Cisco)\n"); |
8347587d VB |
134 | #endif |
135 | #ifdef ENABLE_EDP | |
53132616 | 136 | fprintf(stderr, "-e Enable the support of EDP protocol. (Extreme)\n"); |
8347587d VB |
137 | #endif |
138 | #ifdef ENABLE_FDP | |
53132616 | 139 | fprintf(stderr, "-f Enable the support of FDP protocol. (Foundry)\n"); |
8347587d VB |
140 | #endif |
141 | #ifdef ENABLE_SONMP | |
53132616 | 142 | fprintf(stderr, "-s Enable the support of SONMP protocol. (Nortel)\n"); |
8347587d | 143 | #endif |
53132616 VB |
144 | |
145 | fprintf(stderr, "\n"); | |
8347587d | 146 | #endif |
53132616 | 147 | |
e809a587 | 148 | fprintf(stderr, "see manual page lldpd(8) for more information\n"); |
43c02e7b VB |
149 | exit(1); |
150 | } | |
151 | ||
6e75df87 | 152 | struct lldpd_hardware * |
44002d66 | 153 | lldpd_get_hardware(struct lldpd *cfg, char *name, int index, struct lldpd_ops *ops) |
43c02e7b | 154 | { |
6e75df87 VB |
155 | struct lldpd_hardware *hardware; |
156 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { | |
849954d7 | 157 | if ((strcmp(hardware->h_ifname, name) == 0) && |
44002d66 | 158 | (hardware->h_ifindex == index) && |
849954d7 | 159 | ((!ops) || (ops == hardware->h_ops))) |
6e75df87 | 160 | break; |
43c02e7b | 161 | } |
6e75df87 | 162 | return hardware; |
43c02e7b VB |
163 | } |
164 | ||
6e75df87 VB |
165 | struct lldpd_hardware * |
166 | lldpd_alloc_hardware(struct lldpd *cfg, char *name) | |
43c02e7b | 167 | { |
6e75df87 | 168 | struct lldpd_hardware *hardware; |
43c02e7b | 169 | |
6e75df87 VB |
170 | if ((hardware = (struct lldpd_hardware *) |
171 | calloc(1, sizeof(struct lldpd_hardware))) == NULL) | |
172 | return NULL; | |
43c02e7b | 173 | |
6e75df87 VB |
174 | strlcpy(hardware->h_ifname, name, sizeof(hardware->h_ifname)); |
175 | hardware->h_lport.p_chassis = LOCAL_CHASSIS(cfg); | |
9df5ec3d | 176 | hardware->h_lport.p_chassis->c_refcount++; |
6e75df87 | 177 | TAILQ_INIT(&hardware->h_rports); |
43c02e7b | 178 | |
6e75df87 VB |
179 | #ifdef ENABLE_LLDPMED |
180 | if (LOCAL_CHASSIS(cfg)->c_med_cap_available) { | |
181 | hardware->h_lport.p_med_cap_enabled = LLDPMED_CAP_CAP; | |
182 | if (!cfg->g_noinventory) | |
183 | hardware->h_lport.p_med_cap_enabled |= LLDPMED_CAP_IV; | |
184 | } | |
185 | #endif | |
186 | #ifdef ENABLE_DOT1 | |
187 | TAILQ_INIT(&hardware->h_lport.p_vlans); | |
9757bfbc SK |
188 | TAILQ_INIT(&hardware->h_lport.p_ppvids); |
189 | TAILQ_INIT(&hardware->h_lport.p_pids); | |
6e75df87 VB |
190 | #endif |
191 | return hardware; | |
43c02e7b VB |
192 | } |
193 | ||
a1347cd8 | 194 | #ifdef ENABLE_DOT1 |
43c02e7b VB |
195 | void |
196 | lldpd_vlan_cleanup(struct lldpd_port *port) | |
197 | { | |
198 | struct lldpd_vlan *vlan, *vlan_next; | |
199 | for (vlan = TAILQ_FIRST(&port->p_vlans); | |
200 | vlan != NULL; | |
201 | vlan = vlan_next) { | |
202 | free(vlan->v_name); | |
203 | vlan_next = TAILQ_NEXT(vlan, v_entries); | |
204 | TAILQ_REMOVE(&port->p_vlans, vlan, v_entries); | |
205 | free(vlan); | |
206 | } | |
207 | } | |
9757bfbc SK |
208 | |
209 | void | |
210 | lldpd_ppvid_cleanup(struct lldpd_port *port) | |
211 | { | |
212 | struct lldpd_ppvid *ppvid, *ppvid_next; | |
213 | for (ppvid = TAILQ_FIRST(&port->p_ppvids); | |
214 | ppvid != NULL; | |
215 | ppvid = ppvid_next) { | |
216 | ppvid_next = TAILQ_NEXT(ppvid, p_entries); | |
217 | TAILQ_REMOVE(&port->p_ppvids, ppvid, p_entries); | |
218 | free(ppvid); | |
219 | } | |
220 | } | |
221 | ||
222 | void | |
223 | lldpd_pi_cleanup(struct lldpd_port *port) | |
224 | { | |
225 | struct lldpd_pi *pi, *pi_next; | |
226 | for (pi = TAILQ_FIRST(&port->p_pids); | |
227 | pi != NULL; | |
228 | pi = pi_next) { | |
229 | free(pi->p_pi); | |
230 | pi_next = TAILQ_NEXT(pi, p_entries); | |
231 | TAILQ_REMOVE(&port->p_pids, pi, p_entries); | |
232 | free(pi); | |
233 | } | |
234 | } | |
a1347cd8 | 235 | #endif |
43c02e7b | 236 | |
a0edeaf8 | 237 | /* If `all' is true, clear all information, including information that |
4e624dc2 | 238 | are not refreshed periodically. Port should be freed manually. */ |
43c02e7b | 239 | void |
9898ac07 | 240 | lldpd_port_cleanup(struct lldpd *cfg, struct lldpd_port *port, int all) |
43c02e7b | 241 | { |
740593ff VB |
242 | #ifdef ENABLE_LLDPMED |
243 | int i; | |
a0edeaf8 VB |
244 | if (all) |
245 | for (i=0; i < LLDPMED_LOCFORMAT_LAST; i++) | |
246 | free(port->p_med_location[i].data); | |
740593ff | 247 | #endif |
a1347cd8 | 248 | #ifdef ENABLE_DOT1 |
43c02e7b | 249 | lldpd_vlan_cleanup(port); |
9757bfbc SK |
250 | lldpd_ppvid_cleanup(port); |
251 | lldpd_pi_cleanup(port); | |
a1347cd8 | 252 | #endif |
43c02e7b VB |
253 | free(port->p_id); |
254 | free(port->p_descr); | |
77507b69 VB |
255 | if (all) { |
256 | free(port->p_lastframe); | |
9898ac07 | 257 | if (port->p_chassis) { /* chassis may not have been attributed, yet */ |
77507b69 | 258 | port->p_chassis->c_refcount--; |
9898ac07 V |
259 | port->p_chassis = NULL; |
260 | } | |
77507b69 | 261 | } |
43c02e7b VB |
262 | } |
263 | ||
264 | void | |
77507b69 | 265 | lldpd_chassis_cleanup(struct lldpd_chassis *chassis, int all) |
43c02e7b | 266 | { |
89840df0 VB |
267 | #ifdef ENABLE_LLDPMED |
268 | free(chassis->c_med_hw); | |
517d524b | 269 | free(chassis->c_med_sw); |
89840df0 VB |
270 | free(chassis->c_med_fw); |
271 | free(chassis->c_med_sn); | |
272 | free(chassis->c_med_manuf); | |
273 | free(chassis->c_med_model); | |
274 | free(chassis->c_med_asset); | |
275 | #endif | |
43c02e7b VB |
276 | free(chassis->c_id); |
277 | free(chassis->c_name); | |
278 | free(chassis->c_descr); | |
77507b69 VB |
279 | if (all) |
280 | free(chassis); | |
43c02e7b VB |
281 | } |
282 | ||
283 | void | |
77507b69 | 284 | lldpd_remote_cleanup(struct lldpd *cfg, struct lldpd_hardware *hardware, int all) |
43c02e7b | 285 | { |
77507b69 VB |
286 | struct lldpd_port *port, *port_next; |
287 | int del; | |
288 | for (port = TAILQ_FIRST(&hardware->h_rports); | |
289 | port != NULL; | |
290 | port = port_next) { | |
291 | port_next = TAILQ_NEXT(port, p_entries); | |
292 | del = all; | |
293 | if (!del && | |
294 | (time(NULL) - port->p_lastupdate > port->p_chassis->c_ttl)) { | |
295 | hardware->h_rx_ageout_cnt++; | |
296 | del = 1; | |
297 | } | |
298 | if (del) { | |
299 | TAILQ_REMOVE(&hardware->h_rports, port, p_entries); | |
9898ac07 | 300 | lldpd_port_cleanup(cfg, port, 1); |
4e624dc2 | 301 | free(port); |
77507b69 | 302 | } |
43c02e7b | 303 | } |
43c02e7b VB |
304 | } |
305 | ||
d9be8ea0 | 306 | void |
6e75df87 | 307 | lldpd_hardware_cleanup(struct lldpd *cfg, struct lldpd_hardware *hardware) |
d9be8ea0 | 308 | { |
6e75df87 | 309 | int i; |
9898ac07 | 310 | lldpd_port_cleanup(cfg, &hardware->h_lport, 1); |
6e75df87 VB |
311 | /* If we have a dedicated cleanup function, use it. Otherwise, |
312 | we just free the hardware-dependent data and close all FD | |
313 | in h_recvfds and h_sendfd. */ | |
314 | if (hardware->h_ops->cleanup) | |
315 | hardware->h_ops->cleanup(cfg, hardware); | |
316 | else { | |
317 | free(hardware->h_data); | |
bc598c23 | 318 | for (i=0; i < LLDPD_FD_SETSIZE; i++) |
6e75df87 VB |
319 | if (FD_ISSET(i, &hardware->h_recvfds)) |
320 | close(i); | |
321 | if (hardware->h_sendfd) close(hardware->h_sendfd); | |
322 | } | |
d9be8ea0 VB |
323 | free(hardware); |
324 | } | |
325 | ||
6e75df87 | 326 | static void |
43c02e7b VB |
327 | lldpd_cleanup(struct lldpd *cfg) |
328 | { | |
329 | struct lldpd_hardware *hardware, *hardware_next; | |
aadc9936 | 330 | struct lldpd_chassis *chassis, *chassis_next; |
43c02e7b VB |
331 | |
332 | for (hardware = TAILQ_FIRST(&cfg->g_hardware); hardware != NULL; | |
333 | hardware = hardware_next) { | |
334 | hardware_next = TAILQ_NEXT(hardware, h_entries); | |
6e75df87 | 335 | if (!hardware->h_flags) { |
43c02e7b | 336 | TAILQ_REMOVE(&cfg->g_hardware, hardware, h_entries); |
77507b69 | 337 | lldpd_remote_cleanup(cfg, hardware, 1); |
6e75df87 | 338 | lldpd_hardware_cleanup(cfg, hardware); |
77507b69 VB |
339 | } else |
340 | lldpd_remote_cleanup(cfg, hardware, 0); | |
43c02e7b | 341 | } |
aadc9936 VB |
342 | |
343 | for (chassis = TAILQ_FIRST(&cfg->g_chassis); chassis; | |
344 | chassis = chassis_next) { | |
345 | chassis_next = TAILQ_NEXT(chassis, c_entries); | |
346 | if (chassis->c_refcount == 0) { | |
347 | TAILQ_REMOVE(&cfg->g_chassis, chassis, c_entries); | |
348 | lldpd_chassis_cleanup(chassis, 1); | |
349 | } | |
350 | } | |
43c02e7b VB |
351 | } |
352 | ||
8888d191 | 353 | static int |
43c02e7b VB |
354 | lldpd_guess_type(struct lldpd *cfg, char *frame, int s) |
355 | { | |
356 | int i; | |
357 | if (s < ETH_ALEN) | |
358 | return -1; | |
359 | for (i=0; cfg->g_protocols[i].mode != 0; i++) { | |
360 | if (!cfg->g_protocols[i].enabled) | |
361 | continue; | |
362 | if (cfg->g_protocols[i].guess == NULL) { | |
363 | if (memcmp(frame, cfg->g_protocols[i].mac, ETH_ALEN) == 0) | |
364 | return cfg->g_protocols[i].mode; | |
365 | } else { | |
366 | if (cfg->g_protocols[i].guess(frame, s)) | |
367 | return cfg->g_protocols[i].mode; | |
368 | } | |
369 | } | |
370 | return -1; | |
371 | } | |
372 | ||
8888d191 | 373 | static void |
43c02e7b | 374 | lldpd_decode(struct lldpd *cfg, char *frame, int s, |
0bc32943 | 375 | struct lldpd_hardware *hardware) |
43c02e7b | 376 | { |
77507b69 VB |
377 | int i, result; |
378 | struct lldpd_chassis *chassis, *ochassis = NULL; | |
379 | struct lldpd_port *port, *oport = NULL; | |
43c02e7b VB |
380 | int guess = LLDPD_MODE_LLDP; |
381 | ||
49697208 VB |
382 | if (s < sizeof(struct ethhdr) + 4) |
383 | /* Too short, just discard it */ | |
50a89ca7 | 384 | return; |
49697208 VB |
385 | /* Decapsulate VLAN frames */ |
386 | if (((struct ethhdr*)frame)->h_proto == htons(ETHERTYPE_VLAN)) { | |
387 | /* VLAN decapsulation means to shift 4 bytes left the frame from | |
388 | * offset 2*ETH_ALEN */ | |
389 | memmove(frame + 2*ETH_ALEN, frame + 2*ETH_ALEN + 4, s - 2*ETH_ALEN); | |
390 | s -= 4; | |
391 | } | |
50a89ca7 | 392 | |
77507b69 VB |
393 | TAILQ_FOREACH(oport, &hardware->h_rports, p_entries) { |
394 | if ((oport->p_lastframe != NULL) && | |
395 | (oport->p_lastframe->size == s) && | |
396 | (memcmp(oport->p_lastframe->frame, frame, s) == 0)) { | |
397 | /* Already received the same frame */ | |
398 | oport->p_lastupdate = time(NULL); | |
399 | return; | |
400 | } | |
43c02e7b VB |
401 | } |
402 | ||
f2dcb180 VB |
403 | guess = lldpd_guess_type(cfg, frame, s); |
404 | for (i=0; cfg->g_protocols[i].mode != 0; i++) { | |
405 | if (!cfg->g_protocols[i].enabled) | |
406 | continue; | |
407 | if (cfg->g_protocols[i].mode == guess) { | |
408 | if ((result = cfg->g_protocols[i].decode(cfg, frame, | |
409 | s, hardware, &chassis, &port)) == -1) | |
410 | return; | |
77507b69 VB |
411 | chassis->c_protocol = port->p_protocol = |
412 | cfg->g_protocols[i].mode; | |
f2dcb180 | 413 | break; |
43c02e7b | 414 | } |
f2dcb180 VB |
415 | } |
416 | if (cfg->g_protocols[i].mode == 0) { | |
417 | LLOG_INFO("unable to guess frame type"); | |
43c02e7b | 418 | return; |
f2dcb180 | 419 | } |
43c02e7b | 420 | |
77507b69 VB |
421 | /* Do we already have the same MSAP somewhere? */ |
422 | TAILQ_FOREACH(oport, &hardware->h_rports, p_entries) { | |
423 | if ((port->p_protocol == oport->p_protocol) && | |
424 | (port->p_id_subtype == oport->p_id_subtype) && | |
425 | (port->p_id_len == oport->p_id_len) && | |
426 | (memcmp(port->p_id, oport->p_id, port->p_id_len) == 0) && | |
427 | (chassis->c_id_subtype == oport->p_chassis->c_id_subtype) && | |
428 | (chassis->c_id_len == oport->p_chassis->c_id_len) && | |
429 | (memcmp(chassis->c_id, oport->p_chassis->c_id, | |
430 | chassis->c_id_len) == 0)) { | |
431 | ochassis = oport->p_chassis; | |
432 | break; | |
433 | } | |
43c02e7b | 434 | } |
77507b69 VB |
435 | /* No, but do we already know the system? */ |
436 | if (!oport) { | |
437 | TAILQ_FOREACH(ochassis, &cfg->g_chassis, c_entries) { | |
438 | if ((chassis->c_protocol == ochassis->c_protocol) && | |
439 | (chassis->c_id_subtype == ochassis->c_id_subtype) && | |
440 | (chassis->c_id_len == ochassis->c_id_len) && | |
441 | (memcmp(chassis->c_id, ochassis->c_id, | |
442 | chassis->c_id_len) == 0)) | |
443 | break; | |
43c02e7b | 444 | } |
43c02e7b | 445 | } |
43c02e7b | 446 | |
77507b69 VB |
447 | if (oport) { |
448 | /* The port is known, remove it before adding it back */ | |
449 | TAILQ_REMOVE(&hardware->h_rports, oport, p_entries); | |
9898ac07 | 450 | lldpd_port_cleanup(cfg, oport, 1); |
4e624dc2 | 451 | free(oport); |
77507b69 VB |
452 | } |
453 | if (ochassis) { | |
16f910e1 | 454 | lldpd_update_chassis(ochassis, chassis); |
77507b69 VB |
455 | free(chassis); |
456 | chassis = ochassis; | |
457 | } else { | |
458 | /* Chassis not known, add it */ | |
459 | chassis->c_index = ++cfg->g_lastrid; | |
77507b69 VB |
460 | chassis->c_refcount = 0; |
461 | TAILQ_INSERT_TAIL(&cfg->g_chassis, chassis, c_entries); | |
f4c43902 VB |
462 | i = 0; TAILQ_FOREACH(ochassis, &cfg->g_chassis, c_entries) i++; |
463 | LLOG_DEBUG("Currently, we know %d different systems", i); | |
77507b69 VB |
464 | } |
465 | /* Add port */ | |
466 | port->p_lastchange = port->p_lastupdate = time(NULL); | |
467 | if ((port->p_lastframe = (struct lldpd_frame *)malloc(s + | |
468 | sizeof(int))) != NULL) { | |
469 | port->p_lastframe->size = s; | |
470 | memcpy(port->p_lastframe->frame, frame, s); | |
471 | } | |
472 | TAILQ_INSERT_TAIL(&hardware->h_rports, port, p_entries); | |
473 | port->p_chassis = chassis; | |
474 | port->p_chassis->c_refcount++; | |
9df5ec3d VB |
475 | /* Several cases are possible : |
476 | 1. chassis is new, its refcount was 0. It is now attached | |
477 | to this port, its refcount is 1. | |
478 | 2. chassis already exists and was attached to another | |
479 | port, we increase its refcount accordingly. | |
480 | 3. chassis already exists and was attached to the same | |
481 | port, its refcount was decreased with | |
482 | lldpd_port_cleanup() and is now increased again. | |
483 | ||
484 | In all cases, if the port already existed, it has been | |
485 | freed with lldpd_port_cleanup() and therefore, the refcount | |
486 | of the chassis that was attached to it is decreased. | |
487 | */ | |
42b39485 VB |
488 | i = 0; TAILQ_FOREACH(oport, &hardware->h_rports, p_entries) |
489 | i++; | |
490 | LLOG_DEBUG("Currently, %s knows %d neighbors", | |
f4c43902 | 491 | hardware->h_ifname, i); |
43c02e7b VB |
492 | return; |
493 | } | |
494 | ||
16f910e1 VB |
495 | /* Update chassis `ochassis' with values from `chassis'. */ |
496 | static void | |
497 | lldpd_update_chassis(struct lldpd_chassis *ochassis, | |
498 | const struct lldpd_chassis *chassis) { | |
499 | TAILQ_ENTRY(lldpd_chassis) entries; | |
500 | /* We want to keep refcount, index and list stuff from the current | |
501 | * chassis */ | |
502 | int refcount = ochassis->c_refcount; | |
503 | int index = ochassis->c_index; | |
504 | memcpy(&entries, &ochassis->c_entries, | |
505 | sizeof(entries)); | |
506 | /* Make the copy */ | |
507 | lldpd_chassis_cleanup(ochassis, 0); | |
508 | memcpy(ochassis, chassis, sizeof(struct lldpd_chassis)); | |
509 | /* Restore saved values */ | |
510 | ochassis->c_refcount = refcount; | |
511 | ochassis->c_index = index; | |
512 | memcpy(&ochassis->c_entries, &entries, sizeof(entries)); | |
513 | } | |
514 | ||
c036b15d VB |
515 | /* Get the output of lsb_release -s -d. This is a slow function. It should be |
516 | called once. It return NULL if any problem happens. Otherwise, this is a | |
517 | statically allocated buffer. The result includes the trailing \n */ | |
518 | static char * | |
519 | lldpd_get_lsb_release() { | |
520 | static char release[1024]; | |
521 | char *const command[] = { "lsb_release", "-s", "-d", NULL }; | |
522 | int pid, status, devnull, count; | |
523 | int pipefd[2]; | |
524 | ||
525 | if (pipe(pipefd)) { | |
526 | LLOG_WARN("unable to get a pair of pipes"); | |
527 | return NULL; | |
528 | } | |
529 | ||
530 | if ((pid = fork()) < 0) { | |
531 | LLOG_WARN("unable to fork"); | |
532 | return NULL; | |
533 | } | |
534 | switch (pid) { | |
535 | case 0: | |
536 | /* Child, exec lsb_release */ | |
537 | close(pipefd[0]); | |
538 | if ((devnull = open("/dev/null", O_RDWR, 0)) != -1) { | |
539 | dup2(devnull, STDIN_FILENO); | |
540 | dup2(devnull, STDERR_FILENO); | |
541 | dup2(pipefd[1], STDOUT_FILENO); | |
542 | if (devnull > 2) close(devnull); | |
543 | if (pipefd[1] > 2) close(pipefd[1]); | |
544 | execvp("lsb_release", command); | |
545 | } | |
546 | exit(127); | |
547 | break; | |
548 | default: | |
549 | /* Father, read the output from the children */ | |
550 | close(pipefd[1]); | |
551 | count = 0; | |
552 | do { | |
553 | status = read(pipefd[0], release+count, sizeof(release)-count); | |
554 | if ((status == -1) && (errno == EINTR)) continue; | |
555 | if (status > 0) | |
556 | count += status; | |
557 | } while (count < sizeof(release) && (status > 0)); | |
558 | if (status < 0) { | |
559 | LLOG_WARN("unable to read from lsb_release"); | |
560 | close(pipefd[0]); | |
561 | waitpid(pid, &status, 0); | |
562 | return NULL; | |
563 | } | |
564 | close(pipefd[0]); | |
565 | if (count >= sizeof(release)) { | |
566 | LLOG_INFO("output of lsb_release is too large"); | |
567 | waitpid(pid, &status, 0); | |
568 | return NULL; | |
569 | } | |
570 | status = -1; | |
571 | if (waitpid(pid, &status, 0) != pid) | |
572 | return NULL; | |
573 | if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) { | |
574 | LLOG_INFO("lsb_release information not available"); | |
575 | return NULL; | |
576 | } | |
577 | if (!count) { | |
578 | LLOG_INFO("lsb_release returned an empty string"); | |
579 | return NULL; | |
580 | } | |
581 | release[count] = '\0'; | |
582 | return release; | |
583 | } | |
584 | /* Should not be here */ | |
585 | return NULL; | |
586 | } | |
587 | ||
ae87586a MT |
588 | /* Same like lldpd_get_lsb_release but reads /etc/os-release for PRETTY_NAME=. */ |
589 | static char * | |
590 | lldpd_get_os_release() { | |
591 | static char release[1024]; | |
9757bfbc SK |
592 | char line[1024]; |
593 | char *key, *val; | |
594 | char *ptr1 = release; | |
595 | char *ptr2 = release; | |
ae87586a MT |
596 | |
597 | FILE *fp = fopen("/etc/os-release", "r"); | |
598 | if (!fp) { | |
e02afca4 | 599 | LLOG_WARN("could not open /etc/os-release"); |
ae87586a MT |
600 | return NULL; |
601 | } | |
602 | ||
ae87586a MT |
603 | while ((fgets(line, 1024, fp) != NULL)) { |
604 | key = strtok(line, "="); | |
605 | val = strtok(NULL, "="); | |
606 | ||
607 | if (strncmp(key, "PRETTY_NAME", 1024) == 0) { | |
608 | strncpy(release, val, 1024); | |
609 | break; | |
610 | } | |
611 | } | |
612 | fclose(fp); | |
613 | ||
614 | /* Remove trailing newline and all " in the string. */ | |
ae87586a MT |
615 | while (*ptr1 != 0) { |
616 | if ((*ptr1 == '"') || (*ptr1 == '\n')) { | |
617 | ++ptr1; | |
618 | } else { | |
619 | *ptr2++ = *ptr1++; | |
620 | } | |
621 | } | |
622 | *ptr2 = 0; | |
623 | ||
624 | return release; | |
625 | } | |
626 | ||
77d7090e VB |
627 | int |
628 | lldpd_callback_add(struct lldpd *cfg, int fd, void(*fn)(CALLBACK_SIG), void *data) | |
629 | { | |
630 | struct lldpd_callback *callback; | |
631 | if ((callback = (struct lldpd_callback *) | |
632 | malloc(sizeof(struct lldpd_callback))) == NULL) | |
633 | return -1; | |
634 | callback->fd = fd; | |
635 | callback->function = fn; | |
636 | callback->data = data; | |
637 | TAILQ_INSERT_TAIL(&cfg->g_callbacks, callback, next); | |
638 | return 0; | |
639 | } | |
640 | ||
641 | void | |
642 | lldpd_callback_del(struct lldpd *cfg, int fd, void(*fn)(CALLBACK_SIG)) | |
643 | { | |
644 | struct lldpd_callback *callback, *callback_next; | |
645 | for (callback = TAILQ_FIRST(&cfg->g_callbacks); | |
646 | callback; | |
647 | callback = callback_next) { | |
648 | callback_next = TAILQ_NEXT(callback, next); | |
649 | if ((callback->fd == fd) && | |
650 | (callback->function = fn)) { | |
651 | free(callback->data); | |
652 | TAILQ_REMOVE(&cfg->g_callbacks, callback, next); | |
653 | free(callback); | |
654 | } | |
655 | } | |
656 | } | |
16f910e1 | 657 | |
42b39485 VB |
658 | /* Hide unwanted ports depending on smart mode set by the user */ |
659 | static void | |
660 | lldpd_hide_all(struct lldpd *cfg) | |
661 | { | |
662 | struct lldpd_hardware *hardware; | |
8482abe9 VB |
663 | |
664 | if (!cfg->g_smart) | |
665 | return; | |
666 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { | |
667 | if (cfg->g_smart & SMART_INCOMING_FILTER) | |
668 | lldpd_hide_ports(cfg, hardware, SMART_INCOMING); | |
669 | if (cfg->g_smart & SMART_OUTGOING_FILTER) | |
670 | lldpd_hide_ports(cfg, hardware, SMART_OUTGOING); | |
671 | } | |
672 | } | |
673 | ||
674 | static void | |
675 | lldpd_hide_ports(struct lldpd *cfg, struct lldpd_hardware *hardware, int mask) { | |
42b39485 VB |
676 | struct lldpd_port *port; |
677 | int protocols[LLDPD_MODE_MAX+1]; | |
8482abe9 VB |
678 | char buffer[256]; |
679 | int i, j, k, found; | |
42b39485 VB |
680 | unsigned int min; |
681 | ||
8482abe9 VB |
682 | /* Compute the number of occurrences of each protocol */ |
683 | for (i = 0; i <= LLDPD_MODE_MAX; i++) protocols[i] = 0; | |
684 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) | |
685 | protocols[port->p_protocol]++; | |
686 | ||
687 | /* Turn the protocols[] array into an array of | |
688 | enabled/disabled protocols. 1 means enabled, 0 | |
689 | means disabled. */ | |
690 | min = (unsigned int)-1; | |
691 | for (i = 0; i <= LLDPD_MODE_MAX; i++) | |
692 | if (protocols[i] && (protocols[i] < min)) | |
693 | min = protocols[i]; | |
694 | found = 0; | |
695 | for (i = 0; i <= LLDPD_MODE_MAX; i++) | |
696 | if ((protocols[i] == min) && !found) { | |
697 | /* If we need a tie breaker, we take | |
698 | the first protocol only */ | |
699 | if (cfg->g_smart & mask & | |
700 | (SMART_OUTGOING_ONE_PROTO | SMART_INCOMING_ONE_PROTO)) | |
701 | found = 1; | |
702 | protocols[i] = 1; | |
703 | } else protocols[i] = 0; | |
704 | ||
705 | /* We set the p_hidden flag to 1 if the protocol is disabled */ | |
706 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) { | |
707 | if (mask == SMART_OUTGOING) | |
708 | port->p_hidden_out = protocols[port->p_protocol]?0:1; | |
709 | else | |
710 | port->p_hidden_in = protocols[port->p_protocol]?0:1; | |
711 | } | |
712 | ||
713 | /* If we want only one neighbor, we take the first one */ | |
714 | if (cfg->g_smart & mask & | |
715 | (SMART_OUTGOING_ONE_NEIGH | SMART_INCOMING_ONE_NEIGH)) { | |
42b39485 | 716 | found = 0; |
8482abe9 VB |
717 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) { |
718 | if (mask == SMART_OUTGOING) { | |
719 | if (found) port->p_hidden_out = 1; | |
720 | if (!port->p_hidden_out) | |
721 | found = 1; | |
722 | } | |
723 | if (mask == SMART_INCOMING) { | |
724 | if (found) port->p_hidden_in = 1; | |
725 | if (!port->p_hidden_in) | |
42b39485 | 726 | found = 1; |
42b39485 VB |
727 | } |
728 | } | |
8482abe9 | 729 | } |
42b39485 | 730 | |
8482abe9 VB |
731 | /* Print a debug message summarizing the operation */ |
732 | for (i = 0; i <= LLDPD_MODE_MAX; i++) protocols[i] = 0; | |
733 | k = j = 0; | |
734 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) { | |
735 | if (!(((mask == SMART_OUTGOING) && port->p_hidden_out) || | |
736 | ((mask == SMART_INCOMING) && port->p_hidden_in))) { | |
737 | k++; | |
738 | protocols[port->p_protocol] = 1; | |
42b39485 | 739 | } |
8482abe9 VB |
740 | j++; |
741 | } | |
742 | buffer[0] = '\0'; | |
743 | for (i=0; cfg->g_protocols[i].mode != 0; i++) { | |
744 | if (cfg->g_protocols[i].enabled && protocols[cfg->g_protocols[i].mode]) { | |
745 | if (strlen(buffer) + | |
746 | strlen(cfg->g_protocols[i].name) + 3 > sizeof(buffer)) { | |
747 | /* Unlikely, our buffer is too small */ | |
748 | memcpy(buffer + sizeof(buffer) - 4, "...", 4); | |
749 | break; | |
42b39485 | 750 | } |
8482abe9 VB |
751 | if (buffer[0]) |
752 | strcat(buffer, ", "); | |
753 | strcat(buffer, cfg->g_protocols[i].name); | |
42b39485 VB |
754 | } |
755 | } | |
8482abe9 VB |
756 | LLOG_DEBUG("[%s] %s: %d visible neigh / %d. Protocols: %s.", |
757 | (mask == SMART_OUTGOING)?"out filter":"in filter", | |
758 | hardware->h_ifname, k, j, buffer[0]?buffer:"(none)"); | |
42b39485 VB |
759 | } |
760 | ||
8888d191 | 761 | static void |
43c02e7b VB |
762 | lldpd_recv_all(struct lldpd *cfg) |
763 | { | |
764 | struct lldpd_hardware *hardware; | |
77d7090e | 765 | struct lldpd_callback *callback, *callback_next; |
43c02e7b VB |
766 | fd_set rfds; |
767 | struct timeval tv; | |
43c02e7b | 768 | #ifdef USE_SNMP |
630b4134 VB |
769 | struct timeval snmptv; |
770 | int snmpblock = 0; | |
43c02e7b | 771 | #endif |
0bc32943 | 772 | int rc, nfds, n; |
43c02e7b VB |
773 | char *buffer; |
774 | ||
775 | do { | |
776 | tv.tv_sec = cfg->g_delay - (time(NULL) - cfg->g_lastsent); | |
777 | if (tv.tv_sec < 0) | |
778 | tv.tv_sec = LLDPD_TX_DELAY; | |
779 | if (tv.tv_sec >= cfg->g_delay) | |
780 | tv.tv_sec = cfg->g_delay; | |
781 | tv.tv_usec = 0; | |
782 | ||
783 | FD_ZERO(&rfds); | |
784 | nfds = -1; | |
785 | ||
786 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { | |
787 | /* Ignore if interface is down */ | |
6e75df87 | 788 | if ((hardware->h_flags & IFF_RUNNING) == 0) |
43c02e7b | 789 | continue; |
6e75df87 VB |
790 | /* This is quite expensive but we don't rely on internal |
791 | * structure of fd_set. */ | |
bc598c23 | 792 | for (n = 0; n < LLDPD_FD_SETSIZE; n++) |
6e75df87 VB |
793 | if (FD_ISSET(n, &hardware->h_recvfds)) { |
794 | FD_SET(n, &rfds); | |
795 | if (nfds < n) | |
796 | nfds = n; | |
797 | } | |
43c02e7b | 798 | } |
77d7090e VB |
799 | TAILQ_FOREACH(callback, &cfg->g_callbacks, next) { |
800 | FD_SET(callback->fd, &rfds); | |
801 | if (nfds < callback->fd) | |
802 | nfds = callback->fd; | |
43c02e7b | 803 | } |
43c02e7b VB |
804 | |
805 | #ifdef USE_SNMP | |
630b4134 VB |
806 | if (cfg->g_snmp) { |
807 | snmpblock = 0; | |
808 | memcpy(&snmptv, &tv, sizeof(struct timeval)); | |
809 | snmp_select_info(&nfds, &rfds, &snmptv, &snmpblock); | |
810 | if (snmpblock == 0) | |
811 | memcpy(&tv, &snmptv, sizeof(struct timeval)); | |
812 | } | |
43c02e7b VB |
813 | #endif /* USE_SNMP */ |
814 | if (nfds == -1) { | |
815 | sleep(cfg->g_delay); | |
816 | return; | |
817 | } | |
818 | ||
819 | rc = select(nfds + 1, &rfds, NULL, NULL, &tv); | |
820 | if (rc == -1) { | |
821 | if (errno == EINTR) | |
822 | continue; | |
823 | LLOG_WARN("failure on select"); | |
824 | break; | |
825 | } | |
826 | #ifdef USE_SNMP | |
827 | if (cfg->g_snmp) { | |
828 | if (rc > 0) | |
829 | snmp_read(&rfds); | |
830 | else if (rc == 0) | |
831 | snmp_timeout(); | |
832 | } | |
833 | #endif /* USE_SNMP */ | |
834 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { | |
bc598c23 | 835 | for (n = 0; n < LLDPD_FD_SETSIZE; n++) |
6e75df87 VB |
836 | if ((FD_ISSET(n, &hardware->h_recvfds)) && |
837 | (FD_ISSET(n, &rfds))) break; | |
bc598c23 | 838 | if (n == LLDPD_FD_SETSIZE) continue; |
6e75df87 VB |
839 | if ((buffer = (char *)malloc( |
840 | hardware->h_mtu)) == NULL) { | |
841 | LLOG_WARN("failed to alloc reception buffer"); | |
842 | continue; | |
843 | } | |
844 | if ((n = hardware->h_ops->recv(cfg, hardware, | |
845 | n, buffer, hardware->h_mtu)) == -1) { | |
43c02e7b | 846 | free(buffer); |
6e75df87 | 847 | continue; |
43c02e7b | 848 | } |
6e75df87 VB |
849 | hardware->h_rx_cnt++; |
850 | lldpd_decode(cfg, buffer, n, hardware); | |
6b41bbd3 | 851 | lldpd_hide_all(cfg); /* Immediatly hide */ |
6e75df87 VB |
852 | free(buffer); |
853 | break; | |
43c02e7b | 854 | } |
77d7090e VB |
855 | for (callback = TAILQ_FIRST(&cfg->g_callbacks); |
856 | callback; | |
857 | callback = callback_next) { | |
858 | /* Callback function can use TAILQ_REMOVE */ | |
859 | callback_next = TAILQ_NEXT(callback, next); | |
860 | if (FD_ISSET(callback->fd, &rfds)) | |
861 | callback->function(cfg, callback); | |
43c02e7b VB |
862 | } |
863 | ||
864 | #ifdef USE_SNMP | |
865 | if (cfg->g_snmp) { | |
866 | run_alarms(); | |
867 | netsnmp_check_outstanding_agent_requests(); | |
868 | } | |
869 | #endif /* USE_SNMP */ | |
870 | } while ((rc != 0) || (time(NULL) - cfg->g_lastsent < cfg->g_delay)); | |
871 | } | |
872 | ||
8888d191 | 873 | static void |
43c02e7b VB |
874 | lldpd_send_all(struct lldpd *cfg) |
875 | { | |
876 | struct lldpd_hardware *hardware; | |
77507b69 | 877 | struct lldpd_port *port; |
0d86e62f | 878 | int i, sent; |
f7db0dd8 | 879 | |
43c02e7b VB |
880 | cfg->g_lastsent = time(NULL); |
881 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { | |
882 | /* Ignore if interface is down */ | |
6e75df87 | 883 | if ((hardware->h_flags & IFF_RUNNING) == 0) |
43c02e7b VB |
884 | continue; |
885 | ||
0d86e62f | 886 | sent = 0; |
43c02e7b VB |
887 | for (i=0; cfg->g_protocols[i].mode != 0; i++) { |
888 | if (!cfg->g_protocols[i].enabled) | |
889 | continue; | |
77507b69 | 890 | /* We send only if we have at least one remote system |
0c877af0 VB |
891 | * speaking this protocol or if the protocol is forced */ |
892 | if (cfg->g_protocols[i].enabled > 1) { | |
893 | cfg->g_protocols[i].send(cfg, hardware); | |
894 | sent++; | |
895 | continue; | |
896 | } | |
77507b69 | 897 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) { |
42b39485 VB |
898 | /* If this remote port is disabled, we don't |
899 | * consider it */ | |
8482abe9 VB |
900 | if (port->p_hidden_out && |
901 | (cfg->g_smart & SMART_OUTGOING_FILTER)) | |
42b39485 | 902 | continue; |
77507b69 VB |
903 | if (port->p_protocol == |
904 | cfg->g_protocols[i].mode) { | |
905 | cfg->g_protocols[i].send(cfg, | |
906 | hardware); | |
0c877af0 | 907 | sent++; |
77507b69 VB |
908 | break; |
909 | } | |
910 | } | |
43c02e7b | 911 | } |
77507b69 VB |
912 | |
913 | if (!sent) | |
914 | /* Nothing was sent for this port, let's speak LLDP */ | |
915 | cfg->g_protocols[0].send(cfg, | |
916 | hardware); | |
43c02e7b VB |
917 | } |
918 | } | |
919 | ||
89840df0 | 920 | #ifdef ENABLE_LLDPMED |
8888d191 | 921 | static void |
89840df0 VB |
922 | lldpd_med(struct lldpd_chassis *chassis) |
923 | { | |
924 | free(chassis->c_med_hw); | |
925 | free(chassis->c_med_fw); | |
926 | free(chassis->c_med_sn); | |
927 | free(chassis->c_med_manuf); | |
928 | free(chassis->c_med_model); | |
929 | free(chassis->c_med_asset); | |
930 | chassis->c_med_hw = dmi_hw(); | |
931 | chassis->c_med_fw = dmi_fw(); | |
932 | chassis->c_med_sn = dmi_sn(); | |
933 | chassis->c_med_manuf = dmi_manuf(); | |
934 | chassis->c_med_model = dmi_model(); | |
935 | chassis->c_med_asset = dmi_asset(); | |
936 | } | |
937 | #endif | |
938 | ||
8888d191 | 939 | static void |
6e75df87 | 940 | lldpd_update_localchassis(struct lldpd *cfg) |
43c02e7b | 941 | { |
6e75df87 VB |
942 | struct utsname un; |
943 | char *hp; | |
43c02e7b VB |
944 | int f; |
945 | char status; | |
6e75df87 | 946 | struct lldpd_hardware *hardware; |
43c02e7b VB |
947 | |
948 | /* Set system name and description */ | |
6e75df87 | 949 | if (uname(&un) != 0) |
43c02e7b | 950 | fatal("failed to get system information"); |
b5562b23 | 951 | if ((hp = priv_gethostbyname()) == NULL) |
43c02e7b | 952 | fatal("failed to get system name"); |
77507b69 VB |
953 | free(LOCAL_CHASSIS(cfg)->c_name); |
954 | free(LOCAL_CHASSIS(cfg)->c_descr); | |
955 | if ((LOCAL_CHASSIS(cfg)->c_name = strdup(hp)) == NULL) | |
249644a4 | 956 | fatal(NULL); |
40ce835b ST |
957 | if (cfg->g_descr_override) { |
958 | if (asprintf(&LOCAL_CHASSIS(cfg)->c_descr, "%s", | |
959 | cfg->g_descr_override) == -1) | |
de1b1b3a | 960 | fatal("failed to set full system description"); |
40ce835b ST |
961 | } else { |
962 | if (cfg->g_advertise_version) { | |
a9db9b44 | 963 | if (asprintf(&LOCAL_CHASSIS(cfg)->c_descr, "%s %s %s %s %s", |
c036b15d | 964 | cfg->g_lsb_release?cfg->g_lsb_release:"", |
a9db9b44 | 965 | un.sysname, un.release, un.version, un.machine) |
40ce835b ST |
966 | == -1) |
967 | fatal("failed to set full system description"); | |
968 | } else { | |
969 | if (asprintf(&LOCAL_CHASSIS(cfg)->c_descr, "%s", | |
c036b15d | 970 | cfg->g_lsb_release?cfg->g_lsb_release:un.sysname) == -1) |
40ce835b ST |
971 | fatal("failed to set minimal system description"); |
972 | } | |
973 | } | |
43c02e7b VB |
974 | |
975 | /* Check forwarding */ | |
b5562b23 | 976 | if ((f = priv_open("/proc/sys/net/ipv4/ip_forward")) >= 0) { |
e5c5ae41 VB |
977 | if ((read(f, &status, 1) == 1) && (status == '1')) |
978 | LOCAL_CHASSIS(cfg)->c_cap_enabled |= LLDP_CAP_ROUTER; | |
979 | else | |
980 | LOCAL_CHASSIS(cfg)->c_cap_enabled &= ~LLDP_CAP_ROUTER; | |
43c02e7b VB |
981 | close(f); |
982 | } | |
89840df0 | 983 | #ifdef ENABLE_LLDPMED |
77507b69 VB |
984 | if (LOCAL_CHASSIS(cfg)->c_cap_available & LLDP_CAP_TELEPHONE) |
985 | LOCAL_CHASSIS(cfg)->c_cap_enabled |= LLDP_CAP_TELEPHONE; | |
986 | lldpd_med(LOCAL_CHASSIS(cfg)); | |
987 | free(LOCAL_CHASSIS(cfg)->c_med_sw); | |
de1b1b3a VB |
988 | if (cfg->g_advertise_version) |
989 | LOCAL_CHASSIS(cfg)->c_med_sw = strdup(un.release); | |
990 | else | |
991 | LOCAL_CHASSIS(cfg)->c_med_sw = strdup("Unknown"); | |
89840df0 | 992 | #endif |
43c02e7b | 993 | |
6e75df87 VB |
994 | /* Set chassis ID if needed */ |
995 | if ((LOCAL_CHASSIS(cfg)->c_id == NULL) && | |
996 | (hardware = TAILQ_FIRST(&cfg->g_hardware))) { | |
997 | if ((LOCAL_CHASSIS(cfg)->c_id = | |
998 | malloc(sizeof(hardware->h_lladdr))) == NULL) | |
999 | fatal(NULL); | |
1000 | LOCAL_CHASSIS(cfg)->c_id_subtype = LLDP_CHASSISID_SUBTYPE_LLADDR; | |
1001 | LOCAL_CHASSIS(cfg)->c_id_len = sizeof(hardware->h_lladdr); | |
1002 | memcpy(LOCAL_CHASSIS(cfg)->c_id, | |
1003 | hardware->h_lladdr, sizeof(hardware->h_lladdr)); | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | static void | |
1008 | lldpd_update_localports(struct lldpd *cfg) | |
1009 | { | |
1010 | struct ifaddrs *ifap; | |
1011 | struct lldpd_hardware *hardware; | |
1012 | lldpd_ifhandlers ifhs[] = { | |
ba85f9f4 | 1013 | lldpd_ifh_whitelist, /* Is the interface whitelisted? */ |
849954d7 | 1014 | lldpd_ifh_bond, /* Handle bond */ |
6e75df87 | 1015 | lldpd_ifh_eth, /* Handle classic ethernet interfaces */ |
5994b27d | 1016 | #ifdef ENABLE_DOT1 |
6e75df87 | 1017 | lldpd_ifh_vlan, /* Handle VLAN */ |
5994b27d | 1018 | #endif |
6e75df87 VB |
1019 | lldpd_ifh_mgmt, /* Handle management address (if not already handled) */ |
1020 | NULL | |
1021 | }; | |
1022 | lldpd_ifhandlers *ifh; | |
1023 | ||
1024 | /* h_flags is set to 0 for each port. If the port is updated, h_flags | |
1025 | * will be set to a non-zero value. This will allow us to clean up any | |
1026 | * non up-to-date port */ | |
43c02e7b VB |
1027 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) |
1028 | hardware->h_flags = 0; | |
1029 | ||
77507b69 | 1030 | LOCAL_CHASSIS(cfg)->c_mgmt.s_addr = INADDR_ANY; |
6e75df87 VB |
1031 | if (getifaddrs(&ifap) != 0) |
1032 | fatal("lldpd_update_localports: failed to get interface list"); | |
1033 | ||
1034 | /* We will run the list of interfaces through a list of interface | |
1035 | * handlers. Each handler will create or update some hardware port (and | |
1036 | * will set h_flags to a non zero value. The handler can use the list of | |
1037 | * interfaces but this is not mandatory. If the interface handler | |
1038 | * handles an interface from the list, it should set ifa_flags to 0 to | |
1039 | * let know the other handlers that it took care of this interface. This | |
1040 | * means that more specific handlers should be before less specific | |
1041 | * ones. */ | |
1042 | for (ifh = ifhs; *ifh != NULL; ifh++) | |
1043 | (*ifh)(cfg, ifap); | |
43c02e7b | 1044 | freeifaddrs(ifap); |
6e75df87 | 1045 | } |
43c02e7b | 1046 | |
6e75df87 VB |
1047 | static void |
1048 | lldpd_loop(struct lldpd *cfg) | |
1049 | { | |
1050 | /* Main loop. | |
1051 | ||
1052 | 1. Update local ports information | |
1053 | 2. Clean unwanted (removed) local ports | |
1054 | 3. Update local chassis information | |
1055 | 4. Send packets | |
1056 | 5. Receive packets | |
42b39485 | 1057 | 6. Update smart mode |
6e75df87 | 1058 | */ |
849954d7 | 1059 | LOCAL_CHASSIS(cfg)->c_cap_enabled = 0; |
6e75df87 | 1060 | lldpd_update_localports(cfg); |
43c02e7b | 1061 | lldpd_cleanup(cfg); |
6e75df87 | 1062 | lldpd_update_localchassis(cfg); |
537a8043 VB |
1063 | if (!cfg->g_receiveonly) |
1064 | lldpd_send_all(cfg); | |
43c02e7b VB |
1065 | lldpd_recv_all(cfg); |
1066 | } | |
1067 | ||
8888d191 | 1068 | static void |
43c02e7b VB |
1069 | lldpd_shutdown(int sig) |
1070 | { | |
1071 | LLOG_INFO("signal received, exiting"); | |
1072 | exit(0); | |
1073 | } | |
1074 | ||
1075 | /* For signal handling */ | |
8888d191 | 1076 | static struct lldpd *gcfg = NULL; |
43c02e7b | 1077 | |
8888d191 | 1078 | static void |
43c02e7b VB |
1079 | lldpd_exit() |
1080 | { | |
6e75df87 | 1081 | struct lldpd_hardware *hardware, *hardware_next; |
b5562b23 VB |
1082 | close(gcfg->g_ctl); |
1083 | priv_ctl_cleanup(); | |
6e75df87 VB |
1084 | for (hardware = TAILQ_FIRST(&gcfg->g_hardware); hardware != NULL; |
1085 | hardware = hardware_next) { | |
1086 | hardware_next = TAILQ_NEXT(hardware, h_entries); | |
1087 | lldpd_hardware_cleanup(gcfg, hardware); | |
43c02e7b VB |
1088 | } |
1089 | #ifdef USE_SNMP | |
1090 | if (gcfg->g_snmp) | |
1091 | agent_shutdown(); | |
1092 | #endif /* USE_SNMP */ | |
1093 | } | |
1094 | ||
8482abe9 VB |
1095 | struct intint { int a; int b; }; |
1096 | static const struct intint filters[] = { | |
1097 | { 0, 0 }, | |
1098 | { 1, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | | |
1099 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
1100 | { 2, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO }, | |
1101 | { 3, SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
1102 | { 4, SMART_INCOMING_FILTER | SMART_OUTGOING_FILTER }, | |
1103 | { 5, SMART_INCOMING_FILTER }, | |
1104 | { 6, SMART_OUTGOING_FILTER }, | |
1105 | { 7, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | SMART_INCOMING_ONE_NEIGH | | |
1106 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
1107 | { 8, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | SMART_INCOMING_ONE_NEIGH }, | |
1108 | { 9, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH | | |
1109 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
1110 | { 10, SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
1111 | { 11, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH }, | |
1112 | { 12, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH | | |
1113 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
1114 | { 13, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH | | |
1115 | SMART_OUTGOING_FILTER }, | |
1116 | { 14, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | | |
1117 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
1118 | { 15, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | | |
1119 | SMART_OUTGOING_FILTER }, | |
1120 | { 16, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | SMART_INCOMING_ONE_NEIGH | | |
1121 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
1122 | { 17, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | SMART_INCOMING_ONE_NEIGH | | |
1123 | SMART_OUTGOING_FILTER }, | |
1124 | { 18, SMART_INCOMING_FILTER | | |
1125 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
1126 | { 19, SMART_INCOMING_FILTER | | |
1127 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
1128 | { -1, 0 } | |
1129 | }; | |
1130 | ||
43c02e7b | 1131 | int |
2acc1418 | 1132 | lldpd_main(int argc, char *argv[]) |
43c02e7b VB |
1133 | { |
1134 | struct lldpd *cfg; | |
77507b69 | 1135 | struct lldpd_chassis *lchassis; |
e809a587 VB |
1136 | int ch, debug = 0; |
1137 | #ifdef USE_SNMP | |
1138 | int snmp = 0; | |
bbea66e1 | 1139 | char *agentx = NULL; /* AgentX socket */ |
e809a587 | 1140 | #endif |
43c02e7b | 1141 | char *mgmtp = NULL; |
ba85f9f4 | 1142 | char *interfaces = NULL; |
993a6e50 | 1143 | char *popt, opts[] = |
ba85f9f4 | 1144 | "H:hkrdxX:m:I:p:M:S:i@ "; |
de1b1b3a | 1145 | int i, found, advertise_version = 1; |
89840df0 | 1146 | #ifdef ENABLE_LLDPMED |
e809a587 | 1147 | int lldpmed = 0, noinventory = 0; |
89840df0 | 1148 | #endif |
40ce835b | 1149 | char *descr_override = NULL; |
c036b15d | 1150 | char *lsb_release = NULL; |
8482abe9 | 1151 | int smart = 15; |
537a8043 | 1152 | int receiveonly = 0; |
43c02e7b VB |
1153 | |
1154 | saved_argv = argv; | |
1155 | ||
1156 | /* | |
1157 | * Get and parse command line options | |
1158 | */ | |
f0bd3505 | 1159 | popt = strchr(opts, '@'); |
0c877af0 | 1160 | for (i=0; protos[i].mode != 0; i++) |
43c02e7b | 1161 | *(popt++) = protos[i].arg; |
43c02e7b VB |
1162 | *popt = '\0'; |
1163 | while ((ch = getopt(argc, argv, opts)) != -1) { | |
1164 | switch (ch) { | |
b162b740 VB |
1165 | case 'h': |
1166 | usage(); | |
1167 | break; | |
43c02e7b VB |
1168 | case 'd': |
1169 | debug++; | |
1170 | break; | |
537a8043 VB |
1171 | case 'r': |
1172 | receiveonly = 1; | |
1173 | break; | |
43c02e7b VB |
1174 | case 'm': |
1175 | mgmtp = optarg; | |
1176 | break; | |
ba85f9f4 VB |
1177 | case 'I': |
1178 | interfaces = optarg; | |
1179 | break; | |
de1b1b3a VB |
1180 | case 'k': |
1181 | advertise_version = 0; | |
1182 | break; | |
e809a587 | 1183 | #ifdef ENABLE_LLDPMED |
115ff55c | 1184 | case 'M': |
89840df0 | 1185 | lldpmed = atoi(optarg); |
e809a587 VB |
1186 | if ((lldpmed < 1) || (lldpmed > 4)) { |
1187 | fprintf(stderr, "-M requires an argument between 1 and 4\n"); | |
89840df0 | 1188 | usage(); |
e809a587 | 1189 | } |
89840df0 | 1190 | break; |
e809a587 | 1191 | case 'i': |
e809a587 | 1192 | noinventory = 1; |
115ff55c | 1193 | break; |
e809a587 | 1194 | #else |
115ff55c VB |
1195 | case 'M': |
1196 | case 'i': | |
115ff55c | 1197 | case 'P': |
e809a587 VB |
1198 | fprintf(stderr, "LLDP-MED support is not built-in\n"); |
1199 | usage(); | |
e809a587 | 1200 | break; |
115ff55c | 1201 | #endif |
e809a587 | 1202 | #ifdef USE_SNMP |
bbea66e1 V |
1203 | case 'x': |
1204 | snmp = 1; | |
1205 | break; | |
1206 | case 'X': | |
43c02e7b | 1207 | snmp = 1; |
bbea66e1 V |
1208 | agentx = optarg; |
1209 | break; | |
e809a587 | 1210 | #else |
bbea66e1 V |
1211 | case 'x': |
1212 | case 'X': | |
e809a587 VB |
1213 | fprintf(stderr, "SNMP support is not built-in\n"); |
1214 | usage(); | |
1215 | #endif | |
43c02e7b | 1216 | break; |
40ce835b ST |
1217 | case 'S': |
1218 | descr_override = strdup(optarg); | |
1219 | break; | |
42b39485 | 1220 | case 'H': |
8482abe9 | 1221 | smart = atoi(optarg); |
42b39485 | 1222 | break; |
43c02e7b VB |
1223 | default: |
1224 | found = 0; | |
1225 | for (i=0; protos[i].mode != 0; i++) { | |
43c02e7b | 1226 | if (ch == protos[i].arg) { |
0c877af0 VB |
1227 | protos[i].enabled++; |
1228 | /* When an argument enable | |
1229 | several protocols, only the | |
1230 | first one can be forced. */ | |
1231 | if (found && protos[i].enabled > 1) | |
1232 | protos[i].enabled = 1; | |
43c02e7b VB |
1233 | found = 1; |
1234 | } | |
1235 | } | |
1236 | if (!found) | |
1237 | usage(); | |
1238 | } | |
1239 | } | |
8482abe9 VB |
1240 | |
1241 | /* Set correct smart mode */ | |
1242 | for (i=0; (filters[i].a != -1) && (filters[i].a != smart); i++); | |
1243 | if (filters[i].a == -1) { | |
1244 | fprintf(stderr, "Incorrect mode for -H\n"); | |
1245 | usage(); | |
1246 | } | |
1247 | smart = filters[i].b; | |
115ff55c | 1248 | |
6bb9c4e0 | 1249 | log_init(debug, __progname); |
4b9a5a23 | 1250 | tzset(); /* Get timezone info before chroot */ |
a2993d83 | 1251 | |
eac2f38a VB |
1252 | if (!debug) { |
1253 | int pid; | |
1254 | char *spid; | |
1255 | if (daemon(0, 0) != 0) | |
1256 | fatal("failed to detach daemon"); | |
1257 | if ((pid = open(LLDPD_PID_FILE, | |
0aa5f676 | 1258 | O_TRUNC | O_CREAT | O_WRONLY, 0644)) == -1) |
eac2f38a VB |
1259 | fatal("unable to open pid file " LLDPD_PID_FILE); |
1260 | if (asprintf(&spid, "%d\n", getpid()) == -1) | |
1261 | fatal("unable to create pid file " LLDPD_PID_FILE); | |
1262 | if (write(pid, spid, strlen(spid)) == -1) | |
1263 | fatal("unable to write pid file " LLDPD_PID_FILE); | |
1264 | free(spid); | |
1265 | close(pid); | |
1266 | } | |
1267 | ||
ae87586a MT |
1268 | /* Try to read system information from /etc/os-release if possible. |
1269 | Fall back to lsb_release for compatibility. */ | |
1270 | lsb_release = lldpd_get_os_release(); | |
1271 | if (!lsb_release) { | |
1272 | lsb_release = lldpd_get_lsb_release(); | |
1273 | } | |
c036b15d | 1274 | |
a2993d83 | 1275 | priv_init(PRIVSEP_CHROOT); |
43c02e7b | 1276 | |
43c02e7b VB |
1277 | if ((cfg = (struct lldpd *) |
1278 | calloc(1, sizeof(struct lldpd))) == NULL) | |
1279 | fatal(NULL); | |
1280 | ||
766f32b3 | 1281 | cfg->g_mgmt_pattern = mgmtp; |
ba85f9f4 | 1282 | cfg->g_interfaces = interfaces; |
42b39485 | 1283 | cfg->g_smart = smart; |
537a8043 | 1284 | cfg->g_receiveonly = receiveonly; |
43c02e7b VB |
1285 | |
1286 | /* Get ioctl socket */ | |
1287 | if ((cfg->g_sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) | |
1288 | fatal("failed to get ioctl socket"); | |
1289 | cfg->g_delay = LLDPD_TX_DELAY; | |
1290 | ||
c036b15d VB |
1291 | /* Description */ |
1292 | if (!(cfg->g_advertise_version = advertise_version)) | |
1293 | /* Remove the \n */ | |
1294 | lsb_release[strlen(lsb_release) - 1] = '\0'; | |
1295 | cfg->g_lsb_release = lsb_release; | |
40ce835b ST |
1296 | if (descr_override) |
1297 | cfg->g_descr_override = descr_override; | |
1298 | ||
43c02e7b | 1299 | /* Set system capabilities */ |
77507b69 VB |
1300 | if ((lchassis = (struct lldpd_chassis*) |
1301 | calloc(1, sizeof(struct lldpd_chassis))) == NULL) | |
1302 | fatal(NULL); | |
1303 | lchassis->c_cap_available = LLDP_CAP_BRIDGE | LLDP_CAP_WLAN | | |
43c02e7b | 1304 | LLDP_CAP_ROUTER; |
89840df0 VB |
1305 | #ifdef ENABLE_LLDPMED |
1306 | if (lldpmed > 0) { | |
1307 | if (lldpmed == LLDPMED_CLASS_III) | |
77507b69 VB |
1308 | lchassis->c_cap_available |= LLDP_CAP_TELEPHONE; |
1309 | lchassis->c_med_type = lldpmed; | |
1310 | lchassis->c_med_cap_available = LLDPMED_CAP_CAP | | |
4c0d2715 VB |
1311 | LLDPMED_CAP_IV | LLDPMED_CAP_LOCATION | |
1312 | LLDPMED_CAP_POLICY | LLDPMED_CAP_MDI_PSE | LLDPMED_CAP_MDI_PD; | |
740593ff | 1313 | cfg->g_noinventory = noinventory; |
42bddd41 VB |
1314 | } else |
1315 | cfg->g_noinventory = 1; | |
89840df0 | 1316 | #endif |
43c02e7b VB |
1317 | |
1318 | /* Set TTL */ | |
77507b69 | 1319 | lchassis->c_ttl = LLDPD_TTL; |
43c02e7b VB |
1320 | |
1321 | cfg->g_protocols = protos; | |
43c02e7b | 1322 | for (i=0; protos[i].mode != 0; i++) |
0c877af0 VB |
1323 | if (protos[i].enabled > 1) |
1324 | LLOG_INFO("protocol %s enabled and forced", protos[i].name); | |
1325 | else if (protos[i].enabled) | |
43c02e7b | 1326 | LLOG_INFO("protocol %s enabled", protos[i].name); |
0c877af0 | 1327 | else |
43c02e7b | 1328 | LLOG_INFO("protocol %s disabled", protos[i].name); |
43c02e7b VB |
1329 | |
1330 | TAILQ_INIT(&cfg->g_hardware); | |
77507b69 VB |
1331 | TAILQ_INIT(&cfg->g_chassis); |
1332 | TAILQ_INSERT_TAIL(&cfg->g_chassis, lchassis, c_entries); | |
9898ac07 | 1333 | lchassis->c_refcount++; /* We should always keep a reference to local chassis */ |
43c02e7b | 1334 | |
77d7090e VB |
1335 | TAILQ_INIT(&cfg->g_callbacks); |
1336 | ||
43c02e7b VB |
1337 | #ifdef USE_SNMP |
1338 | if (snmp) { | |
1339 | cfg->g_snmp = 1; | |
bbea66e1 | 1340 | agent_init(cfg, agentx, debug); |
43c02e7b VB |
1341 | } |
1342 | #endif /* USE_SNMP */ | |
1343 | ||
1344 | /* Create socket */ | |
6f1046d1 | 1345 | if ((cfg->g_ctl = priv_ctl_create()) == -1) |
b5562b23 | 1346 | fatalx("unable to create control socket " LLDPD_CTL_SOCKET); |
77d7090e VB |
1347 | if (lldpd_callback_add(cfg, cfg->g_ctl, ctl_accept, NULL) != 0) |
1348 | fatalx("unable to add callback for control socket"); | |
43c02e7b | 1349 | |
43c02e7b VB |
1350 | gcfg = cfg; |
1351 | if (atexit(lldpd_exit) != 0) { | |
b5562b23 VB |
1352 | close(cfg->g_ctl); |
1353 | priv_ctl_cleanup(); | |
43c02e7b VB |
1354 | fatal("unable to set exit function"); |
1355 | } | |
43c02e7b VB |
1356 | |
1357 | /* Signal handling */ | |
b5562b23 | 1358 | signal(SIGHUP, lldpd_shutdown); |
43c02e7b VB |
1359 | signal(SIGINT, lldpd_shutdown); |
1360 | signal(SIGTERM, lldpd_shutdown); | |
1361 | ||
1362 | for (;;) | |
1363 | lldpd_loop(cfg); | |
1364 | ||
1365 | return (0); | |
1366 | } |