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Commit | Line | Data |
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43c02e7b VB |
1 | /* |
2 | * Copyright (c) 2008 Vincent Bernat <bernat@luffy.cx> | |
3 | * | |
4 | * Permission to use, copy, modify, and distribute this software for any | |
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> | |
29 | #include <sys/socket.h> | |
30 | #include <sys/select.h> | |
31 | #include <sys/time.h> | |
32 | #include <sys/ioctl.h> | |
33 | #include <arpa/inet.h> | |
43c02e7b | 34 | #include <net/if_arp.h> |
43c02e7b VB |
35 | |
36 | #ifdef USE_SNMP | |
37 | #include <net-snmp/net-snmp-config.h> | |
38 | #include <net-snmp/net-snmp-includes.h> | |
39 | #include <net-snmp/agent/net-snmp-agent-includes.h> | |
40 | #include <net-snmp/agent/snmp_vars.h> | |
41 | #endif /* USE_SNMP */ | |
42 | ||
8888d191 | 43 | static void usage(void); |
43c02e7b | 44 | |
8888d191 | 45 | static struct protocol protos[] = |
43c02e7b VB |
46 | { |
47 | { LLDPD_MODE_LLDP, 1, "LLDP", ' ', lldp_send, lldp_decode, NULL, | |
f2dcb180 | 48 | LLDP_MULTICAST_ADDR }, |
4bad1937 | 49 | #ifdef ENABLE_CDP |
43c02e7b | 50 | { LLDPD_MODE_CDPV1, 0, "CDPv1", 'c', cdpv1_send, cdp_decode, cdpv1_guess, |
f2dcb180 | 51 | CDP_MULTICAST_ADDR }, |
43c02e7b | 52 | { LLDPD_MODE_CDPV2, 0, "CDPv2", 'c', cdpv2_send, cdp_decode, cdpv2_guess, |
f2dcb180 | 53 | CDP_MULTICAST_ADDR }, |
4bad1937 VB |
54 | #endif |
55 | #ifdef ENABLE_SONMP | |
43c02e7b | 56 | { LLDPD_MODE_SONMP, 0, "SONMP", 's', sonmp_send, sonmp_decode, NULL, |
f2dcb180 | 57 | SONMP_MULTICAST_ADDR }, |
4bad1937 VB |
58 | #endif |
59 | #ifdef ENABLE_EDP | |
43c02e7b | 60 | { LLDPD_MODE_EDP, 0, "EDP", 'e', edp_send, edp_decode, NULL, |
f2dcb180 | 61 | EDP_MULTICAST_ADDR }, |
4bad1937 VB |
62 | #endif |
63 | #ifdef ENABLE_FDP | |
031118c4 | 64 | { LLDPD_MODE_FDP, 0, "FDP", 'f', fdp_send, cdp_decode, NULL, |
f2dcb180 | 65 | FDP_MULTICAST_ADDR }, |
4bad1937 | 66 | #endif |
43c02e7b | 67 | { 0, 0, "any", ' ', NULL, NULL, NULL, |
f2dcb180 | 68 | {0,0,0,0,0,0} } |
43c02e7b VB |
69 | }; |
70 | ||
6e75df87 VB |
71 | static void lldpd_update_localchassis(struct lldpd *); |
72 | static void lldpd_update_localports(struct lldpd *); | |
73 | static void lldpd_cleanup(struct lldpd *); | |
8888d191 VB |
74 | static void lldpd_loop(struct lldpd *); |
75 | static void lldpd_shutdown(int); | |
6f1046d1 | 76 | static void lldpd_exit(void); |
8888d191 VB |
77 | static void lldpd_send_all(struct lldpd *); |
78 | static void lldpd_recv_all(struct lldpd *); | |
79 | static int lldpd_guess_type(struct lldpd *, char *, int); | |
80 | static void lldpd_decode(struct lldpd *, char *, int, | |
0bc32943 | 81 | struct lldpd_hardware *); |
16f910e1 VB |
82 | static void lldpd_update_chassis(struct lldpd_chassis *, |
83 | const struct lldpd_chassis *); | |
89840df0 | 84 | #ifdef ENABLE_LLDPMED |
8888d191 | 85 | static void lldpd_med(struct lldpd_chassis *); |
89840df0 | 86 | #endif |
43c02e7b | 87 | |
8888d191 | 88 | static char **saved_argv; |
6bb9c4e0 VB |
89 | #ifdef HAVE___PROGNAME |
90 | extern const char *__progname; | |
91 | #else | |
92 | # define __progname "lldpd" | |
93 | #endif | |
43c02e7b | 94 | |
8888d191 | 95 | static void |
43c02e7b VB |
96 | usage(void) |
97 | { | |
e809a587 VB |
98 | fprintf(stderr, "usage: %s [options]\n", __progname); |
99 | fprintf(stderr, "see manual page lldpd(8) for more information\n"); | |
43c02e7b VB |
100 | exit(1); |
101 | } | |
102 | ||
6e75df87 | 103 | struct lldpd_hardware * |
44002d66 | 104 | lldpd_get_hardware(struct lldpd *cfg, char *name, int index, struct lldpd_ops *ops) |
43c02e7b | 105 | { |
6e75df87 VB |
106 | struct lldpd_hardware *hardware; |
107 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { | |
849954d7 | 108 | if ((strcmp(hardware->h_ifname, name) == 0) && |
44002d66 | 109 | (hardware->h_ifindex == index) && |
849954d7 | 110 | ((!ops) || (ops == hardware->h_ops))) |
6e75df87 | 111 | break; |
43c02e7b | 112 | } |
6e75df87 | 113 | return hardware; |
43c02e7b VB |
114 | } |
115 | ||
6e75df87 VB |
116 | struct lldpd_hardware * |
117 | lldpd_alloc_hardware(struct lldpd *cfg, char *name) | |
43c02e7b | 118 | { |
6e75df87 | 119 | struct lldpd_hardware *hardware; |
43c02e7b | 120 | |
6e75df87 VB |
121 | if ((hardware = (struct lldpd_hardware *) |
122 | calloc(1, sizeof(struct lldpd_hardware))) == NULL) | |
123 | return NULL; | |
43c02e7b | 124 | |
6e75df87 VB |
125 | strlcpy(hardware->h_ifname, name, sizeof(hardware->h_ifname)); |
126 | hardware->h_lport.p_chassis = LOCAL_CHASSIS(cfg); | |
127 | TAILQ_INIT(&hardware->h_rports); | |
43c02e7b | 128 | |
6e75df87 VB |
129 | #ifdef ENABLE_LLDPMED |
130 | if (LOCAL_CHASSIS(cfg)->c_med_cap_available) { | |
131 | hardware->h_lport.p_med_cap_enabled = LLDPMED_CAP_CAP; | |
132 | if (!cfg->g_noinventory) | |
133 | hardware->h_lport.p_med_cap_enabled |= LLDPMED_CAP_IV; | |
134 | } | |
135 | #endif | |
136 | #ifdef ENABLE_DOT1 | |
137 | TAILQ_INIT(&hardware->h_lport.p_vlans); | |
138 | #endif | |
139 | return hardware; | |
43c02e7b VB |
140 | } |
141 | ||
a1347cd8 | 142 | #ifdef ENABLE_DOT1 |
43c02e7b VB |
143 | void |
144 | lldpd_vlan_cleanup(struct lldpd_port *port) | |
145 | { | |
146 | struct lldpd_vlan *vlan, *vlan_next; | |
147 | for (vlan = TAILQ_FIRST(&port->p_vlans); | |
148 | vlan != NULL; | |
149 | vlan = vlan_next) { | |
150 | free(vlan->v_name); | |
151 | vlan_next = TAILQ_NEXT(vlan, v_entries); | |
152 | TAILQ_REMOVE(&port->p_vlans, vlan, v_entries); | |
153 | free(vlan); | |
154 | } | |
155 | } | |
a1347cd8 | 156 | #endif |
43c02e7b | 157 | |
a0edeaf8 | 158 | /* If `all' is true, clear all information, including information that |
4e624dc2 | 159 | are not refreshed periodically. Port should be freed manually. */ |
43c02e7b | 160 | void |
a0edeaf8 | 161 | lldpd_port_cleanup(struct lldpd_port *port, int all) |
43c02e7b | 162 | { |
740593ff VB |
163 | #ifdef ENABLE_LLDPMED |
164 | int i; | |
a0edeaf8 VB |
165 | if (all) |
166 | for (i=0; i < LLDPMED_LOCFORMAT_LAST; i++) | |
167 | free(port->p_med_location[i].data); | |
740593ff | 168 | #endif |
a1347cd8 | 169 | #ifdef ENABLE_DOT1 |
43c02e7b | 170 | lldpd_vlan_cleanup(port); |
a1347cd8 | 171 | #endif |
43c02e7b VB |
172 | free(port->p_id); |
173 | free(port->p_descr); | |
77507b69 VB |
174 | if (all) { |
175 | free(port->p_lastframe); | |
176 | if (port->p_chassis) /* chassis may not have been attributed, yet */ | |
177 | port->p_chassis->c_refcount--; | |
77507b69 | 178 | } |
43c02e7b VB |
179 | } |
180 | ||
181 | void | |
77507b69 | 182 | lldpd_chassis_cleanup(struct lldpd_chassis *chassis, int all) |
43c02e7b | 183 | { |
89840df0 VB |
184 | #ifdef ENABLE_LLDPMED |
185 | free(chassis->c_med_hw); | |
517d524b | 186 | free(chassis->c_med_sw); |
89840df0 VB |
187 | free(chassis->c_med_fw); |
188 | free(chassis->c_med_sn); | |
189 | free(chassis->c_med_manuf); | |
190 | free(chassis->c_med_model); | |
191 | free(chassis->c_med_asset); | |
192 | #endif | |
43c02e7b VB |
193 | free(chassis->c_id); |
194 | free(chassis->c_name); | |
195 | free(chassis->c_descr); | |
77507b69 VB |
196 | if (all) |
197 | free(chassis); | |
43c02e7b VB |
198 | } |
199 | ||
200 | void | |
77507b69 | 201 | lldpd_remote_cleanup(struct lldpd *cfg, struct lldpd_hardware *hardware, int all) |
43c02e7b | 202 | { |
77507b69 VB |
203 | struct lldpd_port *port, *port_next; |
204 | int del; | |
205 | for (port = TAILQ_FIRST(&hardware->h_rports); | |
206 | port != NULL; | |
207 | port = port_next) { | |
208 | port_next = TAILQ_NEXT(port, p_entries); | |
209 | del = all; | |
210 | if (!del && | |
211 | (time(NULL) - port->p_lastupdate > port->p_chassis->c_ttl)) { | |
212 | hardware->h_rx_ageout_cnt++; | |
213 | del = 1; | |
214 | } | |
215 | if (del) { | |
216 | TAILQ_REMOVE(&hardware->h_rports, port, p_entries); | |
217 | lldpd_port_cleanup(port, 1); | |
4e624dc2 | 218 | free(port); |
77507b69 | 219 | } |
43c02e7b | 220 | } |
43c02e7b VB |
221 | } |
222 | ||
d9be8ea0 | 223 | void |
6e75df87 | 224 | lldpd_hardware_cleanup(struct lldpd *cfg, struct lldpd_hardware *hardware) |
d9be8ea0 | 225 | { |
6e75df87 | 226 | int i; |
a0edeaf8 | 227 | lldpd_port_cleanup(&hardware->h_lport, 1); |
6e75df87 VB |
228 | /* If we have a dedicated cleanup function, use it. Otherwise, |
229 | we just free the hardware-dependent data and close all FD | |
230 | in h_recvfds and h_sendfd. */ | |
231 | if (hardware->h_ops->cleanup) | |
232 | hardware->h_ops->cleanup(cfg, hardware); | |
233 | else { | |
234 | free(hardware->h_data); | |
235 | for (i=0; i < FD_SETSIZE; i++) | |
236 | if (FD_ISSET(i, &hardware->h_recvfds)) | |
237 | close(i); | |
238 | if (hardware->h_sendfd) close(hardware->h_sendfd); | |
239 | } | |
d9be8ea0 VB |
240 | free(hardware); |
241 | } | |
242 | ||
6e75df87 | 243 | static void |
43c02e7b VB |
244 | lldpd_cleanup(struct lldpd *cfg) |
245 | { | |
246 | struct lldpd_hardware *hardware, *hardware_next; | |
247 | ||
248 | for (hardware = TAILQ_FIRST(&cfg->g_hardware); hardware != NULL; | |
249 | hardware = hardware_next) { | |
250 | hardware_next = TAILQ_NEXT(hardware, h_entries); | |
6e75df87 | 251 | if (!hardware->h_flags) { |
43c02e7b | 252 | TAILQ_REMOVE(&cfg->g_hardware, hardware, h_entries); |
77507b69 | 253 | lldpd_remote_cleanup(cfg, hardware, 1); |
6e75df87 | 254 | lldpd_hardware_cleanup(cfg, hardware); |
77507b69 VB |
255 | } else |
256 | lldpd_remote_cleanup(cfg, hardware, 0); | |
43c02e7b VB |
257 | } |
258 | } | |
259 | ||
8888d191 | 260 | static int |
43c02e7b VB |
261 | lldpd_guess_type(struct lldpd *cfg, char *frame, int s) |
262 | { | |
263 | int i; | |
264 | if (s < ETH_ALEN) | |
265 | return -1; | |
266 | for (i=0; cfg->g_protocols[i].mode != 0; i++) { | |
267 | if (!cfg->g_protocols[i].enabled) | |
268 | continue; | |
269 | if (cfg->g_protocols[i].guess == NULL) { | |
270 | if (memcmp(frame, cfg->g_protocols[i].mac, ETH_ALEN) == 0) | |
271 | return cfg->g_protocols[i].mode; | |
272 | } else { | |
273 | if (cfg->g_protocols[i].guess(frame, s)) | |
274 | return cfg->g_protocols[i].mode; | |
275 | } | |
276 | } | |
277 | return -1; | |
278 | } | |
279 | ||
8888d191 | 280 | static void |
43c02e7b | 281 | lldpd_decode(struct lldpd *cfg, char *frame, int s, |
0bc32943 | 282 | struct lldpd_hardware *hardware) |
43c02e7b | 283 | { |
77507b69 VB |
284 | int i, result; |
285 | struct lldpd_chassis *chassis, *ochassis = NULL; | |
286 | struct lldpd_port *port, *oport = NULL; | |
43c02e7b VB |
287 | int guess = LLDPD_MODE_LLDP; |
288 | ||
50a89ca7 | 289 | /* Discard VLAN frames */ |
a8105c1b VB |
290 | if ((s >= sizeof(struct ethhdr)) && |
291 | (((struct ethhdr*)frame)->h_proto == htons(ETHERTYPE_VLAN))) | |
50a89ca7 VB |
292 | return; |
293 | ||
77507b69 VB |
294 | TAILQ_FOREACH(oport, &hardware->h_rports, p_entries) { |
295 | if ((oport->p_lastframe != NULL) && | |
296 | (oport->p_lastframe->size == s) && | |
297 | (memcmp(oport->p_lastframe->frame, frame, s) == 0)) { | |
298 | /* Already received the same frame */ | |
299 | oport->p_lastupdate = time(NULL); | |
300 | return; | |
301 | } | |
43c02e7b VB |
302 | } |
303 | ||
f2dcb180 VB |
304 | guess = lldpd_guess_type(cfg, frame, s); |
305 | for (i=0; cfg->g_protocols[i].mode != 0; i++) { | |
306 | if (!cfg->g_protocols[i].enabled) | |
307 | continue; | |
308 | if (cfg->g_protocols[i].mode == guess) { | |
309 | if ((result = cfg->g_protocols[i].decode(cfg, frame, | |
310 | s, hardware, &chassis, &port)) == -1) | |
311 | return; | |
77507b69 VB |
312 | chassis->c_protocol = port->p_protocol = |
313 | cfg->g_protocols[i].mode; | |
f2dcb180 | 314 | break; |
43c02e7b | 315 | } |
f2dcb180 VB |
316 | } |
317 | if (cfg->g_protocols[i].mode == 0) { | |
318 | LLOG_INFO("unable to guess frame type"); | |
43c02e7b | 319 | return; |
f2dcb180 | 320 | } |
43c02e7b | 321 | |
77507b69 VB |
322 | /* Do we already have the same MSAP somewhere? */ |
323 | TAILQ_FOREACH(oport, &hardware->h_rports, p_entries) { | |
324 | if ((port->p_protocol == oport->p_protocol) && | |
325 | (port->p_id_subtype == oport->p_id_subtype) && | |
326 | (port->p_id_len == oport->p_id_len) && | |
327 | (memcmp(port->p_id, oport->p_id, port->p_id_len) == 0) && | |
328 | (chassis->c_id_subtype == oport->p_chassis->c_id_subtype) && | |
329 | (chassis->c_id_len == oport->p_chassis->c_id_len) && | |
330 | (memcmp(chassis->c_id, oport->p_chassis->c_id, | |
331 | chassis->c_id_len) == 0)) { | |
332 | ochassis = oport->p_chassis; | |
333 | break; | |
334 | } | |
43c02e7b | 335 | } |
77507b69 VB |
336 | /* No, but do we already know the system? */ |
337 | if (!oport) { | |
338 | TAILQ_FOREACH(ochassis, &cfg->g_chassis, c_entries) { | |
339 | if ((chassis->c_protocol == ochassis->c_protocol) && | |
340 | (chassis->c_id_subtype == ochassis->c_id_subtype) && | |
341 | (chassis->c_id_len == ochassis->c_id_len) && | |
342 | (memcmp(chassis->c_id, ochassis->c_id, | |
343 | chassis->c_id_len) == 0)) | |
344 | break; | |
43c02e7b | 345 | } |
43c02e7b | 346 | } |
43c02e7b | 347 | |
77507b69 VB |
348 | if (oport) { |
349 | /* The port is known, remove it before adding it back */ | |
350 | TAILQ_REMOVE(&hardware->h_rports, oport, p_entries); | |
351 | lldpd_port_cleanup(oport, 1); | |
4e624dc2 | 352 | free(oport); |
77507b69 VB |
353 | } |
354 | if (ochassis) { | |
16f910e1 | 355 | lldpd_update_chassis(ochassis, chassis); |
77507b69 VB |
356 | free(chassis); |
357 | chassis = ochassis; | |
358 | } else { | |
359 | /* Chassis not known, add it */ | |
360 | chassis->c_index = ++cfg->g_lastrid; | |
361 | port->p_chassis = chassis; | |
362 | chassis->c_refcount = 0; | |
363 | TAILQ_INSERT_TAIL(&cfg->g_chassis, chassis, c_entries); | |
f4c43902 VB |
364 | i = 0; TAILQ_FOREACH(ochassis, &cfg->g_chassis, c_entries) i++; |
365 | LLOG_DEBUG("Currently, we know %d different systems", i); | |
77507b69 VB |
366 | } |
367 | /* Add port */ | |
368 | port->p_lastchange = port->p_lastupdate = time(NULL); | |
369 | if ((port->p_lastframe = (struct lldpd_frame *)malloc(s + | |
370 | sizeof(int))) != NULL) { | |
371 | port->p_lastframe->size = s; | |
372 | memcpy(port->p_lastframe->frame, frame, s); | |
373 | } | |
374 | TAILQ_INSERT_TAIL(&hardware->h_rports, port, p_entries); | |
375 | port->p_chassis = chassis; | |
376 | port->p_chassis->c_refcount++; | |
f4c43902 VB |
377 | i = 0; TAILQ_FOREACH(oport, &hardware->h_rports, p_entries) i++; |
378 | LLOG_DEBUG("Currently, %s known %d neighbors", | |
379 | hardware->h_ifname, i); | |
43c02e7b VB |
380 | return; |
381 | } | |
382 | ||
16f910e1 VB |
383 | /* Update chassis `ochassis' with values from `chassis'. */ |
384 | static void | |
385 | lldpd_update_chassis(struct lldpd_chassis *ochassis, | |
386 | const struct lldpd_chassis *chassis) { | |
387 | TAILQ_ENTRY(lldpd_chassis) entries; | |
388 | /* We want to keep refcount, index and list stuff from the current | |
389 | * chassis */ | |
390 | int refcount = ochassis->c_refcount; | |
391 | int index = ochassis->c_index; | |
392 | memcpy(&entries, &ochassis->c_entries, | |
393 | sizeof(entries)); | |
394 | /* Make the copy */ | |
395 | lldpd_chassis_cleanup(ochassis, 0); | |
396 | memcpy(ochassis, chassis, sizeof(struct lldpd_chassis)); | |
397 | /* Restore saved values */ | |
398 | ochassis->c_refcount = refcount; | |
399 | ochassis->c_index = index; | |
400 | memcpy(&ochassis->c_entries, &entries, sizeof(entries)); | |
401 | } | |
402 | ||
77d7090e VB |
403 | int |
404 | lldpd_callback_add(struct lldpd *cfg, int fd, void(*fn)(CALLBACK_SIG), void *data) | |
405 | { | |
406 | struct lldpd_callback *callback; | |
407 | if ((callback = (struct lldpd_callback *) | |
408 | malloc(sizeof(struct lldpd_callback))) == NULL) | |
409 | return -1; | |
410 | callback->fd = fd; | |
411 | callback->function = fn; | |
412 | callback->data = data; | |
413 | TAILQ_INSERT_TAIL(&cfg->g_callbacks, callback, next); | |
414 | return 0; | |
415 | } | |
416 | ||
417 | void | |
418 | lldpd_callback_del(struct lldpd *cfg, int fd, void(*fn)(CALLBACK_SIG)) | |
419 | { | |
420 | struct lldpd_callback *callback, *callback_next; | |
421 | for (callback = TAILQ_FIRST(&cfg->g_callbacks); | |
422 | callback; | |
423 | callback = callback_next) { | |
424 | callback_next = TAILQ_NEXT(callback, next); | |
425 | if ((callback->fd == fd) && | |
426 | (callback->function = fn)) { | |
427 | free(callback->data); | |
428 | TAILQ_REMOVE(&cfg->g_callbacks, callback, next); | |
429 | free(callback); | |
430 | } | |
431 | } | |
432 | } | |
16f910e1 | 433 | |
8888d191 | 434 | static void |
43c02e7b VB |
435 | lldpd_recv_all(struct lldpd *cfg) |
436 | { | |
437 | struct lldpd_hardware *hardware; | |
77d7090e | 438 | struct lldpd_callback *callback, *callback_next; |
43c02e7b VB |
439 | fd_set rfds; |
440 | struct timeval tv; | |
43c02e7b VB |
441 | #ifdef USE_SNMP |
442 | int fakeblock = 0; | |
443 | struct timeval *tvp = &tv; | |
444 | #endif | |
0bc32943 | 445 | int rc, nfds, n; |
43c02e7b VB |
446 | char *buffer; |
447 | ||
448 | do { | |
449 | tv.tv_sec = cfg->g_delay - (time(NULL) - cfg->g_lastsent); | |
450 | if (tv.tv_sec < 0) | |
451 | tv.tv_sec = LLDPD_TX_DELAY; | |
452 | if (tv.tv_sec >= cfg->g_delay) | |
453 | tv.tv_sec = cfg->g_delay; | |
454 | tv.tv_usec = 0; | |
455 | ||
456 | FD_ZERO(&rfds); | |
457 | nfds = -1; | |
458 | ||
459 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { | |
460 | /* Ignore if interface is down */ | |
6e75df87 | 461 | if ((hardware->h_flags & IFF_RUNNING) == 0) |
43c02e7b | 462 | continue; |
6e75df87 VB |
463 | /* This is quite expensive but we don't rely on internal |
464 | * structure of fd_set. */ | |
465 | for (n = 0; n < FD_SETSIZE; n++) | |
466 | if (FD_ISSET(n, &hardware->h_recvfds)) { | |
467 | FD_SET(n, &rfds); | |
468 | if (nfds < n) | |
469 | nfds = n; | |
470 | } | |
43c02e7b | 471 | } |
77d7090e VB |
472 | TAILQ_FOREACH(callback, &cfg->g_callbacks, next) { |
473 | FD_SET(callback->fd, &rfds); | |
474 | if (nfds < callback->fd) | |
475 | nfds = callback->fd; | |
43c02e7b | 476 | } |
43c02e7b VB |
477 | |
478 | #ifdef USE_SNMP | |
479 | if (cfg->g_snmp) | |
480 | snmp_select_info(&nfds, &rfds, tvp, &fakeblock); | |
481 | #endif /* USE_SNMP */ | |
482 | if (nfds == -1) { | |
483 | sleep(cfg->g_delay); | |
484 | return; | |
485 | } | |
486 | ||
487 | rc = select(nfds + 1, &rfds, NULL, NULL, &tv); | |
488 | if (rc == -1) { | |
489 | if (errno == EINTR) | |
490 | continue; | |
491 | LLOG_WARN("failure on select"); | |
492 | break; | |
493 | } | |
494 | #ifdef USE_SNMP | |
495 | if (cfg->g_snmp) { | |
496 | if (rc > 0) | |
497 | snmp_read(&rfds); | |
498 | else if (rc == 0) | |
499 | snmp_timeout(); | |
500 | } | |
501 | #endif /* USE_SNMP */ | |
502 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { | |
6e75df87 VB |
503 | for (n = 0; n < FD_SETSIZE; n++) |
504 | if ((FD_ISSET(n, &hardware->h_recvfds)) && | |
505 | (FD_ISSET(n, &rfds))) break; | |
506 | if (n == FD_SETSIZE) continue; | |
507 | if ((buffer = (char *)malloc( | |
508 | hardware->h_mtu)) == NULL) { | |
509 | LLOG_WARN("failed to alloc reception buffer"); | |
510 | continue; | |
511 | } | |
512 | if ((n = hardware->h_ops->recv(cfg, hardware, | |
513 | n, buffer, hardware->h_mtu)) == -1) { | |
43c02e7b | 514 | free(buffer); |
6e75df87 | 515 | continue; |
43c02e7b | 516 | } |
6e75df87 VB |
517 | hardware->h_rx_cnt++; |
518 | lldpd_decode(cfg, buffer, n, hardware); | |
519 | free(buffer); | |
520 | break; | |
43c02e7b | 521 | } |
77d7090e VB |
522 | for (callback = TAILQ_FIRST(&cfg->g_callbacks); |
523 | callback; | |
524 | callback = callback_next) { | |
525 | /* Callback function can use TAILQ_REMOVE */ | |
526 | callback_next = TAILQ_NEXT(callback, next); | |
527 | if (FD_ISSET(callback->fd, &rfds)) | |
528 | callback->function(cfg, callback); | |
43c02e7b VB |
529 | } |
530 | ||
531 | #ifdef USE_SNMP | |
532 | if (cfg->g_snmp) { | |
533 | run_alarms(); | |
534 | netsnmp_check_outstanding_agent_requests(); | |
535 | } | |
536 | #endif /* USE_SNMP */ | |
537 | } while ((rc != 0) || (time(NULL) - cfg->g_lastsent < cfg->g_delay)); | |
538 | } | |
539 | ||
8888d191 | 540 | static void |
43c02e7b VB |
541 | lldpd_send_all(struct lldpd *cfg) |
542 | { | |
543 | struct lldpd_hardware *hardware; | |
77507b69 | 544 | struct lldpd_port *port; |
0d86e62f | 545 | int i, sent; |
f7db0dd8 | 546 | |
43c02e7b VB |
547 | cfg->g_lastsent = time(NULL); |
548 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { | |
549 | /* Ignore if interface is down */ | |
6e75df87 | 550 | if ((hardware->h_flags & IFF_RUNNING) == 0) |
43c02e7b VB |
551 | continue; |
552 | ||
0d86e62f | 553 | sent = 0; |
43c02e7b VB |
554 | for (i=0; cfg->g_protocols[i].mode != 0; i++) { |
555 | if (!cfg->g_protocols[i].enabled) | |
556 | continue; | |
77507b69 VB |
557 | /* We send only if we have at least one remote system |
558 | * speaking this protocol */ | |
559 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) { | |
560 | if (port->p_protocol == | |
561 | cfg->g_protocols[i].mode) { | |
562 | cfg->g_protocols[i].send(cfg, | |
563 | hardware); | |
564 | sent = 1; | |
565 | break; | |
566 | } | |
567 | } | |
43c02e7b | 568 | } |
77507b69 VB |
569 | |
570 | if (!sent) | |
571 | /* Nothing was sent for this port, let's speak LLDP */ | |
572 | cfg->g_protocols[0].send(cfg, | |
573 | hardware); | |
43c02e7b VB |
574 | } |
575 | } | |
576 | ||
89840df0 | 577 | #ifdef ENABLE_LLDPMED |
8888d191 | 578 | static void |
89840df0 VB |
579 | lldpd_med(struct lldpd_chassis *chassis) |
580 | { | |
581 | free(chassis->c_med_hw); | |
582 | free(chassis->c_med_fw); | |
583 | free(chassis->c_med_sn); | |
584 | free(chassis->c_med_manuf); | |
585 | free(chassis->c_med_model); | |
586 | free(chassis->c_med_asset); | |
587 | chassis->c_med_hw = dmi_hw(); | |
588 | chassis->c_med_fw = dmi_fw(); | |
589 | chassis->c_med_sn = dmi_sn(); | |
590 | chassis->c_med_manuf = dmi_manuf(); | |
591 | chassis->c_med_model = dmi_model(); | |
592 | chassis->c_med_asset = dmi_asset(); | |
593 | } | |
594 | #endif | |
595 | ||
8888d191 | 596 | static void |
6e75df87 | 597 | lldpd_update_localchassis(struct lldpd *cfg) |
43c02e7b | 598 | { |
6e75df87 VB |
599 | struct utsname un; |
600 | char *hp; | |
43c02e7b VB |
601 | int f; |
602 | char status; | |
6e75df87 | 603 | struct lldpd_hardware *hardware; |
43c02e7b VB |
604 | |
605 | /* Set system name and description */ | |
6e75df87 | 606 | if (uname(&un) != 0) |
43c02e7b | 607 | fatal("failed to get system information"); |
b5562b23 | 608 | if ((hp = priv_gethostbyname()) == NULL) |
43c02e7b | 609 | fatal("failed to get system name"); |
77507b69 VB |
610 | free(LOCAL_CHASSIS(cfg)->c_name); |
611 | free(LOCAL_CHASSIS(cfg)->c_descr); | |
612 | if ((LOCAL_CHASSIS(cfg)->c_name = strdup(hp)) == NULL) | |
249644a4 | 613 | fatal(NULL); |
de1b1b3a VB |
614 | if (cfg->g_advertise_version) { |
615 | if (asprintf(&LOCAL_CHASSIS(cfg)->c_descr, "%s %s %s %s", | |
616 | un.sysname, un.release, un.version, un.machine) == -1) | |
617 | fatal("failed to set full system description"); | |
618 | } else { | |
619 | if (asprintf(&LOCAL_CHASSIS(cfg)->c_descr, "%s", un.sysname) == -1) | |
620 | fatal("failed to set minimal system description"); | |
621 | } | |
43c02e7b VB |
622 | |
623 | /* Check forwarding */ | |
b5562b23 | 624 | if ((f = priv_open("/proc/sys/net/ipv4/ip_forward")) >= 0) { |
4afe659e | 625 | if ((read(f, &status, 1) == 1) && (status == '1')) { |
77507b69 | 626 | LOCAL_CHASSIS(cfg)->c_cap_enabled = LLDP_CAP_ROUTER; |
4afe659e | 627 | } |
43c02e7b VB |
628 | close(f); |
629 | } | |
89840df0 | 630 | #ifdef ENABLE_LLDPMED |
77507b69 VB |
631 | if (LOCAL_CHASSIS(cfg)->c_cap_available & LLDP_CAP_TELEPHONE) |
632 | LOCAL_CHASSIS(cfg)->c_cap_enabled |= LLDP_CAP_TELEPHONE; | |
633 | lldpd_med(LOCAL_CHASSIS(cfg)); | |
634 | free(LOCAL_CHASSIS(cfg)->c_med_sw); | |
de1b1b3a VB |
635 | if (cfg->g_advertise_version) |
636 | LOCAL_CHASSIS(cfg)->c_med_sw = strdup(un.release); | |
637 | else | |
638 | LOCAL_CHASSIS(cfg)->c_med_sw = strdup("Unknown"); | |
89840df0 | 639 | #endif |
43c02e7b | 640 | |
6e75df87 VB |
641 | /* Set chassis ID if needed */ |
642 | if ((LOCAL_CHASSIS(cfg)->c_id == NULL) && | |
643 | (hardware = TAILQ_FIRST(&cfg->g_hardware))) { | |
644 | if ((LOCAL_CHASSIS(cfg)->c_id = | |
645 | malloc(sizeof(hardware->h_lladdr))) == NULL) | |
646 | fatal(NULL); | |
647 | LOCAL_CHASSIS(cfg)->c_id_subtype = LLDP_CHASSISID_SUBTYPE_LLADDR; | |
648 | LOCAL_CHASSIS(cfg)->c_id_len = sizeof(hardware->h_lladdr); | |
649 | memcpy(LOCAL_CHASSIS(cfg)->c_id, | |
650 | hardware->h_lladdr, sizeof(hardware->h_lladdr)); | |
651 | } | |
652 | } | |
653 | ||
654 | static void | |
655 | lldpd_update_localports(struct lldpd *cfg) | |
656 | { | |
657 | struct ifaddrs *ifap; | |
658 | struct lldpd_hardware *hardware; | |
659 | lldpd_ifhandlers ifhs[] = { | |
849954d7 | 660 | lldpd_ifh_bond, /* Handle bond */ |
6e75df87 | 661 | lldpd_ifh_eth, /* Handle classic ethernet interfaces */ |
5994b27d | 662 | #ifdef ENABLE_DOT1 |
6e75df87 | 663 | lldpd_ifh_vlan, /* Handle VLAN */ |
5994b27d | 664 | #endif |
6e75df87 VB |
665 | lldpd_ifh_mgmt, /* Handle management address (if not already handled) */ |
666 | NULL | |
667 | }; | |
668 | lldpd_ifhandlers *ifh; | |
669 | ||
670 | /* h_flags is set to 0 for each port. If the port is updated, h_flags | |
671 | * will be set to a non-zero value. This will allow us to clean up any | |
672 | * non up-to-date port */ | |
43c02e7b VB |
673 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) |
674 | hardware->h_flags = 0; | |
675 | ||
77507b69 | 676 | LOCAL_CHASSIS(cfg)->c_mgmt.s_addr = INADDR_ANY; |
6e75df87 VB |
677 | if (getifaddrs(&ifap) != 0) |
678 | fatal("lldpd_update_localports: failed to get interface list"); | |
679 | ||
680 | /* We will run the list of interfaces through a list of interface | |
681 | * handlers. Each handler will create or update some hardware port (and | |
682 | * will set h_flags to a non zero value. The handler can use the list of | |
683 | * interfaces but this is not mandatory. If the interface handler | |
684 | * handles an interface from the list, it should set ifa_flags to 0 to | |
685 | * let know the other handlers that it took care of this interface. This | |
686 | * means that more specific handlers should be before less specific | |
687 | * ones. */ | |
688 | for (ifh = ifhs; *ifh != NULL; ifh++) | |
689 | (*ifh)(cfg, ifap); | |
43c02e7b | 690 | freeifaddrs(ifap); |
6e75df87 | 691 | } |
43c02e7b | 692 | |
6e75df87 VB |
693 | static void |
694 | lldpd_loop(struct lldpd *cfg) | |
695 | { | |
696 | /* Main loop. | |
697 | ||
698 | 1. Update local ports information | |
699 | 2. Clean unwanted (removed) local ports | |
700 | 3. Update local chassis information | |
701 | 4. Send packets | |
702 | 5. Receive packets | |
703 | */ | |
849954d7 | 704 | LOCAL_CHASSIS(cfg)->c_cap_enabled = 0; |
6e75df87 | 705 | lldpd_update_localports(cfg); |
43c02e7b | 706 | lldpd_cleanup(cfg); |
6e75df87 | 707 | lldpd_update_localchassis(cfg); |
43c02e7b VB |
708 | lldpd_send_all(cfg); |
709 | lldpd_recv_all(cfg); | |
710 | } | |
711 | ||
8888d191 | 712 | static void |
43c02e7b VB |
713 | lldpd_shutdown(int sig) |
714 | { | |
715 | LLOG_INFO("signal received, exiting"); | |
716 | exit(0); | |
717 | } | |
718 | ||
719 | /* For signal handling */ | |
8888d191 | 720 | static struct lldpd *gcfg = NULL; |
43c02e7b | 721 | |
8888d191 | 722 | static void |
43c02e7b VB |
723 | lldpd_exit() |
724 | { | |
6e75df87 | 725 | struct lldpd_hardware *hardware, *hardware_next; |
b5562b23 VB |
726 | close(gcfg->g_ctl); |
727 | priv_ctl_cleanup(); | |
6e75df87 VB |
728 | for (hardware = TAILQ_FIRST(&gcfg->g_hardware); hardware != NULL; |
729 | hardware = hardware_next) { | |
730 | hardware_next = TAILQ_NEXT(hardware, h_entries); | |
731 | lldpd_hardware_cleanup(gcfg, hardware); | |
43c02e7b VB |
732 | } |
733 | #ifdef USE_SNMP | |
734 | if (gcfg->g_snmp) | |
735 | agent_shutdown(); | |
736 | #endif /* USE_SNMP */ | |
737 | } | |
738 | ||
739 | int | |
2acc1418 | 740 | lldpd_main(int argc, char *argv[]) |
43c02e7b VB |
741 | { |
742 | struct lldpd *cfg; | |
77507b69 | 743 | struct lldpd_chassis *lchassis; |
e809a587 VB |
744 | int ch, debug = 0; |
745 | #ifdef USE_SNMP | |
746 | int snmp = 0; | |
bbea66e1 | 747 | char *agentx = NULL; /* AgentX socket */ |
e809a587 | 748 | #endif |
43c02e7b | 749 | char *mgmtp = NULL; |
993a6e50 VB |
750 | char *popt, opts[] = |
751 | #ifdef ENABLE_LISTENVLAN | |
752 | "v" | |
753 | #endif | |
bbea66e1 | 754 | "kdxX:m:p:M:i@ "; |
de1b1b3a | 755 | int i, found, advertise_version = 1; |
993a6e50 VB |
756 | #ifdef ENABLE_LISTENVLAN |
757 | int vlan = 0; | |
758 | #endif | |
89840df0 | 759 | #ifdef ENABLE_LLDPMED |
e809a587 | 760 | int lldpmed = 0, noinventory = 0; |
89840df0 | 761 | #endif |
43c02e7b VB |
762 | |
763 | saved_argv = argv; | |
764 | ||
765 | /* | |
766 | * Get and parse command line options | |
767 | */ | |
f0bd3505 | 768 | popt = strchr(opts, '@'); |
43c02e7b VB |
769 | for (i=0; protos[i].mode != 0; i++) { |
770 | if (protos[i].enabled == 1) continue; | |
771 | *(popt++) = protos[i].arg; | |
772 | } | |
773 | *popt = '\0'; | |
774 | while ((ch = getopt(argc, argv, opts)) != -1) { | |
775 | switch (ch) { | |
993a6e50 | 776 | #ifdef ENABLE_LISTENVLAN |
6a2fa591 VB |
777 | case 'v': |
778 | vlan = 1; | |
779 | break; | |
993a6e50 | 780 | #endif |
43c02e7b VB |
781 | case 'd': |
782 | debug++; | |
783 | break; | |
784 | case 'm': | |
785 | mgmtp = optarg; | |
786 | break; | |
de1b1b3a VB |
787 | case 'k': |
788 | advertise_version = 0; | |
789 | break; | |
e809a587 | 790 | #ifdef ENABLE_LLDPMED |
115ff55c | 791 | case 'M': |
89840df0 | 792 | lldpmed = atoi(optarg); |
e809a587 VB |
793 | if ((lldpmed < 1) || (lldpmed > 4)) { |
794 | fprintf(stderr, "-M requires an argument between 1 and 4\n"); | |
89840df0 | 795 | usage(); |
e809a587 | 796 | } |
89840df0 | 797 | break; |
e809a587 | 798 | case 'i': |
e809a587 | 799 | noinventory = 1; |
115ff55c | 800 | break; |
e809a587 | 801 | #else |
115ff55c VB |
802 | case 'M': |
803 | case 'i': | |
115ff55c | 804 | case 'P': |
e809a587 VB |
805 | fprintf(stderr, "LLDP-MED support is not built-in\n"); |
806 | usage(); | |
e809a587 | 807 | break; |
115ff55c | 808 | #endif |
e809a587 | 809 | #ifdef USE_SNMP |
bbea66e1 V |
810 | case 'x': |
811 | snmp = 1; | |
812 | break; | |
813 | case 'X': | |
43c02e7b | 814 | snmp = 1; |
bbea66e1 V |
815 | agentx = optarg; |
816 | break; | |
e809a587 | 817 | #else |
bbea66e1 V |
818 | case 'x': |
819 | case 'X': | |
e809a587 VB |
820 | fprintf(stderr, "SNMP support is not built-in\n"); |
821 | usage(); | |
822 | #endif | |
43c02e7b VB |
823 | break; |
824 | default: | |
825 | found = 0; | |
826 | for (i=0; protos[i].mode != 0; i++) { | |
827 | if (protos[i].enabled) continue; | |
828 | if (ch == protos[i].arg) { | |
829 | protos[i].enabled = 1; | |
830 | found = 1; | |
831 | } | |
832 | } | |
833 | if (!found) | |
834 | usage(); | |
835 | } | |
836 | } | |
115ff55c | 837 | |
6bb9c4e0 | 838 | log_init(debug, __progname); |
4b9a5a23 | 839 | tzset(); /* Get timezone info before chroot */ |
a2993d83 | 840 | |
eac2f38a VB |
841 | if (!debug) { |
842 | int pid; | |
843 | char *spid; | |
844 | if (daemon(0, 0) != 0) | |
845 | fatal("failed to detach daemon"); | |
846 | if ((pid = open(LLDPD_PID_FILE, | |
0aa5f676 | 847 | O_TRUNC | O_CREAT | O_WRONLY, 0644)) == -1) |
eac2f38a VB |
848 | fatal("unable to open pid file " LLDPD_PID_FILE); |
849 | if (asprintf(&spid, "%d\n", getpid()) == -1) | |
850 | fatal("unable to create pid file " LLDPD_PID_FILE); | |
851 | if (write(pid, spid, strlen(spid)) == -1) | |
852 | fatal("unable to write pid file " LLDPD_PID_FILE); | |
853 | free(spid); | |
854 | close(pid); | |
855 | } | |
856 | ||
a2993d83 | 857 | priv_init(PRIVSEP_CHROOT); |
43c02e7b | 858 | |
43c02e7b VB |
859 | if ((cfg = (struct lldpd *) |
860 | calloc(1, sizeof(struct lldpd))) == NULL) | |
861 | fatal(NULL); | |
862 | ||
766f32b3 | 863 | cfg->g_mgmt_pattern = mgmtp; |
de1b1b3a | 864 | cfg->g_advertise_version = advertise_version; |
993a6e50 | 865 | #ifdef ENABLE_LISTENVLAN |
6a2fa591 | 866 | cfg->g_listen_vlans = vlan; |
993a6e50 | 867 | #endif |
43c02e7b VB |
868 | |
869 | /* Get ioctl socket */ | |
870 | if ((cfg->g_sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) | |
871 | fatal("failed to get ioctl socket"); | |
872 | cfg->g_delay = LLDPD_TX_DELAY; | |
873 | ||
874 | /* Set system capabilities */ | |
77507b69 VB |
875 | if ((lchassis = (struct lldpd_chassis*) |
876 | calloc(1, sizeof(struct lldpd_chassis))) == NULL) | |
877 | fatal(NULL); | |
878 | lchassis->c_cap_available = LLDP_CAP_BRIDGE | LLDP_CAP_WLAN | | |
43c02e7b | 879 | LLDP_CAP_ROUTER; |
89840df0 VB |
880 | #ifdef ENABLE_LLDPMED |
881 | if (lldpmed > 0) { | |
882 | if (lldpmed == LLDPMED_CLASS_III) | |
77507b69 VB |
883 | lchassis->c_cap_available |= LLDP_CAP_TELEPHONE; |
884 | lchassis->c_med_type = lldpmed; | |
885 | lchassis->c_med_cap_available = LLDPMED_CAP_CAP | | |
115ff55c | 886 | LLDPMED_CAP_IV | LLDPMED_CAP_LOCATION; |
740593ff | 887 | cfg->g_noinventory = noinventory; |
42bddd41 VB |
888 | } else |
889 | cfg->g_noinventory = 1; | |
89840df0 | 890 | #endif |
43c02e7b VB |
891 | |
892 | /* Set TTL */ | |
77507b69 | 893 | lchassis->c_ttl = LLDPD_TTL; |
43c02e7b VB |
894 | |
895 | cfg->g_protocols = protos; | |
43c02e7b VB |
896 | for (i=0; protos[i].mode != 0; i++) |
897 | if (protos[i].enabled) { | |
43c02e7b VB |
898 | LLOG_INFO("protocol %s enabled", protos[i].name); |
899 | } else | |
900 | LLOG_INFO("protocol %s disabled", protos[i].name); | |
43c02e7b VB |
901 | |
902 | TAILQ_INIT(&cfg->g_hardware); | |
77507b69 VB |
903 | TAILQ_INIT(&cfg->g_chassis); |
904 | TAILQ_INSERT_TAIL(&cfg->g_chassis, lchassis, c_entries); | |
905 | lchassis->c_refcount++; | |
43c02e7b | 906 | |
77d7090e VB |
907 | TAILQ_INIT(&cfg->g_callbacks); |
908 | ||
43c02e7b VB |
909 | #ifdef USE_SNMP |
910 | if (snmp) { | |
911 | cfg->g_snmp = 1; | |
bbea66e1 | 912 | agent_init(cfg, agentx, debug); |
43c02e7b VB |
913 | } |
914 | #endif /* USE_SNMP */ | |
915 | ||
916 | /* Create socket */ | |
6f1046d1 | 917 | if ((cfg->g_ctl = priv_ctl_create()) == -1) |
b5562b23 | 918 | fatalx("unable to create control socket " LLDPD_CTL_SOCKET); |
77d7090e VB |
919 | if (lldpd_callback_add(cfg, cfg->g_ctl, ctl_accept, NULL) != 0) |
920 | fatalx("unable to add callback for control socket"); | |
43c02e7b | 921 | |
43c02e7b VB |
922 | gcfg = cfg; |
923 | if (atexit(lldpd_exit) != 0) { | |
b5562b23 VB |
924 | close(cfg->g_ctl); |
925 | priv_ctl_cleanup(); | |
43c02e7b VB |
926 | fatal("unable to set exit function"); |
927 | } | |
43c02e7b VB |
928 | |
929 | /* Signal handling */ | |
b5562b23 | 930 | signal(SIGHUP, lldpd_shutdown); |
43c02e7b VB |
931 | signal(SIGINT, lldpd_shutdown); |
932 | signal(SIGTERM, lldpd_shutdown); | |
933 | ||
934 | for (;;) | |
935 | lldpd_loop(cfg); | |
936 | ||
937 | return (0); | |
938 | } |