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