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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> |
e6b36c87 | 27 | #include <assert.h> |
43c02e7b VB |
28 | #include <sys/utsname.h> |
29 | #include <sys/types.h> | |
c036b15d | 30 | #include <sys/wait.h> |
43c02e7b VB |
31 | #include <sys/socket.h> |
32 | #include <sys/select.h> | |
33 | #include <sys/time.h> | |
34 | #include <sys/ioctl.h> | |
35 | #include <arpa/inet.h> | |
43c02e7b | 36 | #include <net/if_arp.h> |
43c02e7b | 37 | |
8888d191 | 38 | static void usage(void); |
43c02e7b | 39 | |
8888d191 | 40 | static struct protocol protos[] = |
43c02e7b | 41 | { |
0c877af0 | 42 | { LLDPD_MODE_LLDP, 1, "LLDP", 'l', lldp_send, lldp_decode, NULL, |
f2dcb180 | 43 | LLDP_MULTICAST_ADDR }, |
4bad1937 | 44 | #ifdef ENABLE_CDP |
43c02e7b | 45 | { LLDPD_MODE_CDPV1, 0, "CDPv1", 'c', cdpv1_send, cdp_decode, cdpv1_guess, |
f2dcb180 | 46 | CDP_MULTICAST_ADDR }, |
43c02e7b | 47 | { LLDPD_MODE_CDPV2, 0, "CDPv2", 'c', cdpv2_send, cdp_decode, cdpv2_guess, |
f2dcb180 | 48 | CDP_MULTICAST_ADDR }, |
4bad1937 VB |
49 | #endif |
50 | #ifdef ENABLE_SONMP | |
43c02e7b | 51 | { LLDPD_MODE_SONMP, 0, "SONMP", 's', sonmp_send, sonmp_decode, NULL, |
f2dcb180 | 52 | SONMP_MULTICAST_ADDR }, |
4bad1937 VB |
53 | #endif |
54 | #ifdef ENABLE_EDP | |
43c02e7b | 55 | { LLDPD_MODE_EDP, 0, "EDP", 'e', edp_send, edp_decode, NULL, |
f2dcb180 | 56 | EDP_MULTICAST_ADDR }, |
4bad1937 VB |
57 | #endif |
58 | #ifdef ENABLE_FDP | |
031118c4 | 59 | { LLDPD_MODE_FDP, 0, "FDP", 'f', fdp_send, cdp_decode, NULL, |
f2dcb180 | 60 | FDP_MULTICAST_ADDR }, |
4bad1937 | 61 | #endif |
43c02e7b | 62 | { 0, 0, "any", ' ', NULL, NULL, NULL, |
f2dcb180 | 63 | {0,0,0,0,0,0} } |
43c02e7b VB |
64 | }; |
65 | ||
8888d191 | 66 | static char **saved_argv; |
6bb9c4e0 VB |
67 | #ifdef HAVE___PROGNAME |
68 | extern const char *__progname; | |
69 | #else | |
70 | # define __progname "lldpd" | |
71 | #endif | |
43c02e7b | 72 | |
8888d191 | 73 | static void |
43c02e7b VB |
74 | usage(void) |
75 | { | |
4593c0dc VB |
76 | fprintf(stderr, "Usage: %s [OPTIONS ...]\n", __progname); |
77 | fprintf(stderr, "Version: %s\n", PACKAGE_STRING); | |
53132616 VB |
78 | |
79 | fprintf(stderr, "\n"); | |
80 | ||
81 | fprintf(stderr, "-d Do not daemonize.\n"); | |
5e64a80e | 82 | fprintf(stderr, "-r Receive-only mode\n"); |
53132616 VB |
83 | fprintf(stderr, "-i Disable LLDP-MED inventory TLV transmission.\n"); |
84 | fprintf(stderr, "-k Disable advertising of kernel release, version, machine.\n"); | |
fde7a7ce | 85 | fprintf(stderr, "-S descr Override the default system description.\n"); |
d4afb919 | 86 | fprintf(stderr, "-P name Override the default hardware platform.\n"); |
d4e4c804 | 87 | fprintf(stderr, "-m IP Specify the IPv4 management addresses of this system.\n"); |
42b39485 | 88 | fprintf(stderr, "-H mode Specify the behaviour when detecting multiple neighbors.\n"); |
fbda1f9f | 89 | fprintf(stderr, "-I iface Limit interfaces to use.\n"); |
8347587d | 90 | #ifdef ENABLE_LLDPMED |
53132616 VB |
91 | fprintf(stderr, "-M class Enable emission of LLDP-MED frame. 'class' should be one of:\n"); |
92 | fprintf(stderr, " 1 Generic Endpoint (Class I)\n"); | |
93 | fprintf(stderr, " 2 Media Endpoint (Class II)\n"); | |
94 | fprintf(stderr, " 3 Communication Device Endpoints (Class III)\n"); | |
95 | fprintf(stderr, " 4 Network Connectivity Device\n"); | |
8347587d VB |
96 | #endif |
97 | #ifdef USE_SNMP | |
53132616 | 98 | fprintf(stderr, "-x Enable SNMP subagent.\n"); |
53132616 VB |
99 | #endif |
100 | fprintf(stderr, "\n"); | |
101 | ||
8347587d VB |
102 | #if defined ENABLE_CDP || defined ENABLE_EDP || defined ENABLE_FDP || defined ENABLE_SONMP |
103 | fprintf(stderr, "Additional protocol support.\n"); | |
104 | #ifdef ENABLE_CDP | |
53132616 | 105 | fprintf(stderr, "-c Enable the support of CDP protocol. (Cisco)\n"); |
8347587d VB |
106 | #endif |
107 | #ifdef ENABLE_EDP | |
53132616 | 108 | fprintf(stderr, "-e Enable the support of EDP protocol. (Extreme)\n"); |
8347587d VB |
109 | #endif |
110 | #ifdef ENABLE_FDP | |
53132616 | 111 | fprintf(stderr, "-f Enable the support of FDP protocol. (Foundry)\n"); |
8347587d VB |
112 | #endif |
113 | #ifdef ENABLE_SONMP | |
53132616 | 114 | fprintf(stderr, "-s Enable the support of SONMP protocol. (Nortel)\n"); |
8347587d | 115 | #endif |
53132616 VB |
116 | |
117 | fprintf(stderr, "\n"); | |
8347587d | 118 | #endif |
53132616 | 119 | |
e809a587 | 120 | fprintf(stderr, "see manual page lldpd(8) for more information\n"); |
43c02e7b VB |
121 | exit(1); |
122 | } | |
123 | ||
6e75df87 | 124 | struct lldpd_hardware * |
44002d66 | 125 | lldpd_get_hardware(struct lldpd *cfg, char *name, int index, struct lldpd_ops *ops) |
43c02e7b | 126 | { |
6e75df87 VB |
127 | struct lldpd_hardware *hardware; |
128 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { | |
849954d7 | 129 | if ((strcmp(hardware->h_ifname, name) == 0) && |
44002d66 | 130 | (hardware->h_ifindex == index) && |
849954d7 | 131 | ((!ops) || (ops == hardware->h_ops))) |
6e75df87 | 132 | break; |
43c02e7b | 133 | } |
6e75df87 | 134 | return hardware; |
43c02e7b VB |
135 | } |
136 | ||
6e75df87 VB |
137 | struct lldpd_hardware * |
138 | lldpd_alloc_hardware(struct lldpd *cfg, char *name) | |
43c02e7b | 139 | { |
6e75df87 | 140 | struct lldpd_hardware *hardware; |
43c02e7b | 141 | |
6e75df87 VB |
142 | if ((hardware = (struct lldpd_hardware *) |
143 | calloc(1, sizeof(struct lldpd_hardware))) == NULL) | |
144 | return NULL; | |
43c02e7b | 145 | |
d6e889b6 | 146 | hardware->h_cfg = cfg; |
6e75df87 VB |
147 | strlcpy(hardware->h_ifname, name, sizeof(hardware->h_ifname)); |
148 | hardware->h_lport.p_chassis = LOCAL_CHASSIS(cfg); | |
9df5ec3d | 149 | hardware->h_lport.p_chassis->c_refcount++; |
6e75df87 | 150 | TAILQ_INIT(&hardware->h_rports); |
43c02e7b | 151 | |
6e75df87 VB |
152 | #ifdef ENABLE_LLDPMED |
153 | if (LOCAL_CHASSIS(cfg)->c_med_cap_available) { | |
154 | hardware->h_lport.p_med_cap_enabled = LLDPMED_CAP_CAP; | |
155 | if (!cfg->g_noinventory) | |
156 | hardware->h_lport.p_med_cap_enabled |= LLDPMED_CAP_IV; | |
157 | } | |
158 | #endif | |
159 | #ifdef ENABLE_DOT1 | |
160 | TAILQ_INIT(&hardware->h_lport.p_vlans); | |
9757bfbc SK |
161 | TAILQ_INIT(&hardware->h_lport.p_ppvids); |
162 | TAILQ_INIT(&hardware->h_lport.p_pids); | |
6e75df87 | 163 | #endif |
d6e889b6 VB |
164 | |
165 | levent_hardware_init(hardware); | |
6e75df87 | 166 | return hardware; |
43c02e7b VB |
167 | } |
168 | ||
a1347cd8 | 169 | #ifdef ENABLE_DOT1 |
43c02e7b VB |
170 | void |
171 | lldpd_vlan_cleanup(struct lldpd_port *port) | |
172 | { | |
173 | struct lldpd_vlan *vlan, *vlan_next; | |
174 | for (vlan = TAILQ_FIRST(&port->p_vlans); | |
175 | vlan != NULL; | |
176 | vlan = vlan_next) { | |
177 | free(vlan->v_name); | |
178 | vlan_next = TAILQ_NEXT(vlan, v_entries); | |
179 | TAILQ_REMOVE(&port->p_vlans, vlan, v_entries); | |
180 | free(vlan); | |
181 | } | |
182 | } | |
9757bfbc SK |
183 | |
184 | void | |
185 | lldpd_ppvid_cleanup(struct lldpd_port *port) | |
186 | { | |
187 | struct lldpd_ppvid *ppvid, *ppvid_next; | |
188 | for (ppvid = TAILQ_FIRST(&port->p_ppvids); | |
189 | ppvid != NULL; | |
190 | ppvid = ppvid_next) { | |
191 | ppvid_next = TAILQ_NEXT(ppvid, p_entries); | |
192 | TAILQ_REMOVE(&port->p_ppvids, ppvid, p_entries); | |
193 | free(ppvid); | |
194 | } | |
195 | } | |
196 | ||
197 | void | |
198 | lldpd_pi_cleanup(struct lldpd_port *port) | |
199 | { | |
200 | struct lldpd_pi *pi, *pi_next; | |
201 | for (pi = TAILQ_FIRST(&port->p_pids); | |
202 | pi != NULL; | |
203 | pi = pi_next) { | |
204 | free(pi->p_pi); | |
205 | pi_next = TAILQ_NEXT(pi, p_entries); | |
206 | TAILQ_REMOVE(&port->p_pids, pi, p_entries); | |
207 | free(pi); | |
208 | } | |
209 | } | |
a1347cd8 | 210 | #endif |
43c02e7b | 211 | |
a0edeaf8 | 212 | /* If `all' is true, clear all information, including information that |
4e624dc2 | 213 | are not refreshed periodically. Port should be freed manually. */ |
43c02e7b | 214 | void |
9898ac07 | 215 | lldpd_port_cleanup(struct lldpd *cfg, struct lldpd_port *port, int all) |
43c02e7b | 216 | { |
740593ff VB |
217 | #ifdef ENABLE_LLDPMED |
218 | int i; | |
a0edeaf8 VB |
219 | if (all) |
220 | for (i=0; i < LLDPMED_LOCFORMAT_LAST; i++) | |
221 | free(port->p_med_location[i].data); | |
740593ff | 222 | #endif |
a1347cd8 | 223 | #ifdef ENABLE_DOT1 |
43c02e7b | 224 | lldpd_vlan_cleanup(port); |
9757bfbc SK |
225 | lldpd_ppvid_cleanup(port); |
226 | lldpd_pi_cleanup(port); | |
a1347cd8 | 227 | #endif |
43c02e7b VB |
228 | free(port->p_id); |
229 | free(port->p_descr); | |
77507b69 VB |
230 | if (all) { |
231 | free(port->p_lastframe); | |
9898ac07 | 232 | if (port->p_chassis) { /* chassis may not have been attributed, yet */ |
77507b69 | 233 | port->p_chassis->c_refcount--; |
9898ac07 V |
234 | port->p_chassis = NULL; |
235 | } | |
77507b69 | 236 | } |
43c02e7b VB |
237 | } |
238 | ||
e6b36c87 JV |
239 | struct lldpd_mgmt * |
240 | lldpd_alloc_mgmt(int family, void *addrptr, size_t addrsize, u_int32_t iface) | |
241 | { | |
242 | struct lldpd_mgmt *mgmt; | |
243 | ||
244 | if (family <= LLDPD_AF_UNSPEC || family >= LLDPD_AF_LAST) { | |
245 | errno = EAFNOSUPPORT; | |
246 | return NULL; | |
247 | } | |
248 | if (addrsize > LLDPD_MGMT_MAXADDRSIZE) { | |
249 | errno = EOVERFLOW; | |
250 | return NULL; | |
251 | } | |
252 | mgmt = calloc(1, sizeof(struct lldpd_mgmt)); | |
253 | if (mgmt == NULL) { | |
254 | errno = ENOMEM; | |
255 | return NULL; | |
256 | } | |
257 | mgmt->m_family = family; | |
258 | assert(addrsize <= LLDPD_MGMT_MAXADDRSIZE); | |
259 | memcpy(&mgmt->m_addr, addrptr, addrsize); | |
260 | mgmt->m_addrsize = addrsize; | |
261 | mgmt->m_iface = iface; | |
262 | return mgmt; | |
263 | } | |
264 | ||
5fb27919 VB |
265 | void |
266 | lldpd_chassis_mgmt_cleanup(struct lldpd_chassis *chassis) | |
267 | { | |
268 | struct lldpd_mgmt *mgmt, *mgmt_next; | |
269 | for (mgmt = TAILQ_FIRST(&chassis->c_mgmt); | |
270 | mgmt != NULL; | |
271 | mgmt = mgmt_next) { | |
272 | mgmt_next = TAILQ_NEXT(mgmt, m_entries); | |
273 | TAILQ_REMOVE(&chassis->c_mgmt, mgmt, m_entries); | |
274 | free(mgmt); | |
275 | } | |
276 | } | |
277 | ||
43c02e7b | 278 | void |
77507b69 | 279 | lldpd_chassis_cleanup(struct lldpd_chassis *chassis, int all) |
43c02e7b | 280 | { |
89840df0 VB |
281 | #ifdef ENABLE_LLDPMED |
282 | free(chassis->c_med_hw); | |
517d524b | 283 | free(chassis->c_med_sw); |
89840df0 VB |
284 | free(chassis->c_med_fw); |
285 | free(chassis->c_med_sn); | |
286 | free(chassis->c_med_manuf); | |
287 | free(chassis->c_med_model); | |
288 | free(chassis->c_med_asset); | |
289 | #endif | |
43c02e7b VB |
290 | free(chassis->c_id); |
291 | free(chassis->c_name); | |
292 | free(chassis->c_descr); | |
5fb27919 | 293 | lldpd_chassis_mgmt_cleanup(chassis); |
77507b69 VB |
294 | if (all) |
295 | free(chassis); | |
43c02e7b VB |
296 | } |
297 | ||
298 | void | |
77507b69 | 299 | lldpd_remote_cleanup(struct lldpd *cfg, struct lldpd_hardware *hardware, int all) |
43c02e7b | 300 | { |
77507b69 VB |
301 | struct lldpd_port *port, *port_next; |
302 | int del; | |
303 | for (port = TAILQ_FIRST(&hardware->h_rports); | |
304 | port != NULL; | |
305 | port = port_next) { | |
306 | port_next = TAILQ_NEXT(port, p_entries); | |
307 | del = all; | |
308 | if (!del && | |
309 | (time(NULL) - port->p_lastupdate > port->p_chassis->c_ttl)) { | |
310 | hardware->h_rx_ageout_cnt++; | |
311 | del = 1; | |
312 | } | |
313 | if (del) { | |
314 | TAILQ_REMOVE(&hardware->h_rports, port, p_entries); | |
9898ac07 | 315 | lldpd_port_cleanup(cfg, port, 1); |
4e624dc2 | 316 | free(port); |
77507b69 | 317 | } |
43c02e7b | 318 | } |
43c02e7b VB |
319 | } |
320 | ||
d9be8ea0 | 321 | void |
6e75df87 | 322 | lldpd_hardware_cleanup(struct lldpd *cfg, struct lldpd_hardware *hardware) |
d9be8ea0 | 323 | { |
9898ac07 | 324 | lldpd_port_cleanup(cfg, &hardware->h_lport, 1); |
6e75df87 VB |
325 | if (hardware->h_ops->cleanup) |
326 | hardware->h_ops->cleanup(cfg, hardware); | |
d6e889b6 | 327 | levent_hardware_release(hardware); |
d9be8ea0 VB |
328 | free(hardware); |
329 | } | |
330 | ||
6e75df87 | 331 | static void |
43c02e7b VB |
332 | lldpd_cleanup(struct lldpd *cfg) |
333 | { | |
334 | struct lldpd_hardware *hardware, *hardware_next; | |
aadc9936 | 335 | struct lldpd_chassis *chassis, *chassis_next; |
43c02e7b VB |
336 | |
337 | for (hardware = TAILQ_FIRST(&cfg->g_hardware); hardware != NULL; | |
338 | hardware = hardware_next) { | |
339 | hardware_next = TAILQ_NEXT(hardware, h_entries); | |
6e75df87 | 340 | if (!hardware->h_flags) { |
43c02e7b | 341 | TAILQ_REMOVE(&cfg->g_hardware, hardware, h_entries); |
77507b69 | 342 | lldpd_remote_cleanup(cfg, hardware, 1); |
6e75df87 | 343 | lldpd_hardware_cleanup(cfg, hardware); |
77507b69 VB |
344 | } else |
345 | lldpd_remote_cleanup(cfg, hardware, 0); | |
43c02e7b | 346 | } |
aadc9936 VB |
347 | |
348 | for (chassis = TAILQ_FIRST(&cfg->g_chassis); chassis; | |
349 | chassis = chassis_next) { | |
350 | chassis_next = TAILQ_NEXT(chassis, c_entries); | |
351 | if (chassis->c_refcount == 0) { | |
352 | TAILQ_REMOVE(&cfg->g_chassis, chassis, c_entries); | |
353 | lldpd_chassis_cleanup(chassis, 1); | |
354 | } | |
355 | } | |
43c02e7b VB |
356 | } |
357 | ||
d938c51f VB |
358 | /* Update chassis `ochassis' with values from `chassis'. The later one is not |
359 | expected to be part of a list! It will also be wiped from memory. */ | |
566c635d | 360 | static void |
d938c51f VB |
361 | lldpd_move_chassis(struct lldpd_chassis *ochassis, |
362 | struct lldpd_chassis *chassis) { | |
566c635d VB |
363 | /* We want to keep refcount, index and list stuff from the current |
364 | * chassis */ | |
d938c51f | 365 | TAILQ_ENTRY(lldpd_chassis) entries; |
566c635d VB |
366 | int refcount = ochassis->c_refcount; |
367 | int index = ochassis->c_index; | |
368 | memcpy(&entries, &ochassis->c_entries, | |
369 | sizeof(entries)); | |
566c635d | 370 | lldpd_chassis_cleanup(ochassis, 0); |
d938c51f VB |
371 | |
372 | /* Make the copy. */ | |
373 | /* WARNING: this is a kludgy hack, we need in-place copy and cannot use | |
374 | * marshaling. */ | |
566c635d | 375 | memcpy(ochassis, chassis, sizeof(struct lldpd_chassis)); |
d938c51f VB |
376 | TAILQ_INIT(&ochassis->c_mgmt); |
377 | ||
378 | /* Copy of management addresses */ | |
379 | struct lldpd_mgmt *mgmt, *mgmt_next; | |
380 | for (mgmt = TAILQ_FIRST(&chassis->c_mgmt); | |
381 | mgmt != NULL; | |
382 | mgmt = mgmt_next) { | |
383 | mgmt_next = TAILQ_NEXT(mgmt, m_entries); | |
384 | TAILQ_REMOVE(&chassis->c_mgmt, mgmt, m_entries); | |
385 | TAILQ_INSERT_TAIL(&ochassis->c_mgmt, mgmt, m_entries); | |
386 | } | |
387 | ||
566c635d VB |
388 | /* Restore saved values */ |
389 | ochassis->c_refcount = refcount; | |
390 | ochassis->c_index = index; | |
391 | memcpy(&ochassis->c_entries, &entries, sizeof(entries)); | |
d938c51f VB |
392 | |
393 | /* Get rid of the new chassis */ | |
394 | free(chassis); | |
566c635d VB |
395 | } |
396 | ||
8888d191 | 397 | static int |
43c02e7b VB |
398 | lldpd_guess_type(struct lldpd *cfg, char *frame, int s) |
399 | { | |
400 | int i; | |
401 | if (s < ETH_ALEN) | |
402 | return -1; | |
403 | for (i=0; cfg->g_protocols[i].mode != 0; i++) { | |
404 | if (!cfg->g_protocols[i].enabled) | |
405 | continue; | |
406 | if (cfg->g_protocols[i].guess == NULL) { | |
407 | if (memcmp(frame, cfg->g_protocols[i].mac, ETH_ALEN) == 0) | |
408 | return cfg->g_protocols[i].mode; | |
409 | } else { | |
410 | if (cfg->g_protocols[i].guess(frame, s)) | |
411 | return cfg->g_protocols[i].mode; | |
412 | } | |
413 | } | |
414 | return -1; | |
415 | } | |
416 | ||
8888d191 | 417 | static void |
43c02e7b | 418 | lldpd_decode(struct lldpd *cfg, char *frame, int s, |
0bc32943 | 419 | struct lldpd_hardware *hardware) |
43c02e7b | 420 | { |
77507b69 VB |
421 | int i, result; |
422 | struct lldpd_chassis *chassis, *ochassis = NULL; | |
423 | struct lldpd_port *port, *oport = NULL; | |
43c02e7b VB |
424 | int guess = LLDPD_MODE_LLDP; |
425 | ||
49697208 VB |
426 | if (s < sizeof(struct ethhdr) + 4) |
427 | /* Too short, just discard it */ | |
50a89ca7 | 428 | return; |
49697208 VB |
429 | /* Decapsulate VLAN frames */ |
430 | if (((struct ethhdr*)frame)->h_proto == htons(ETHERTYPE_VLAN)) { | |
431 | /* VLAN decapsulation means to shift 4 bytes left the frame from | |
432 | * offset 2*ETH_ALEN */ | |
433 | memmove(frame + 2*ETH_ALEN, frame + 2*ETH_ALEN + 4, s - 2*ETH_ALEN); | |
434 | s -= 4; | |
435 | } | |
50a89ca7 | 436 | |
77507b69 VB |
437 | TAILQ_FOREACH(oport, &hardware->h_rports, p_entries) { |
438 | if ((oport->p_lastframe != NULL) && | |
439 | (oport->p_lastframe->size == s) && | |
440 | (memcmp(oport->p_lastframe->frame, frame, s) == 0)) { | |
441 | /* Already received the same frame */ | |
442 | oport->p_lastupdate = time(NULL); | |
443 | return; | |
444 | } | |
43c02e7b VB |
445 | } |
446 | ||
f2dcb180 VB |
447 | guess = lldpd_guess_type(cfg, frame, s); |
448 | for (i=0; cfg->g_protocols[i].mode != 0; i++) { | |
449 | if (!cfg->g_protocols[i].enabled) | |
450 | continue; | |
451 | if (cfg->g_protocols[i].mode == guess) { | |
452 | if ((result = cfg->g_protocols[i].decode(cfg, frame, | |
453 | s, hardware, &chassis, &port)) == -1) | |
454 | return; | |
77507b69 VB |
455 | chassis->c_protocol = port->p_protocol = |
456 | cfg->g_protocols[i].mode; | |
f2dcb180 | 457 | break; |
43c02e7b | 458 | } |
f2dcb180 VB |
459 | } |
460 | if (cfg->g_protocols[i].mode == 0) { | |
ba5116b5 VB |
461 | LLOG_INFO("unable to guess frame type on %s", |
462 | hardware->h_ifname); | |
43c02e7b | 463 | return; |
f2dcb180 | 464 | } |
43c02e7b | 465 | |
77507b69 VB |
466 | /* Do we already have the same MSAP somewhere? */ |
467 | TAILQ_FOREACH(oport, &hardware->h_rports, p_entries) { | |
468 | if ((port->p_protocol == oport->p_protocol) && | |
469 | (port->p_id_subtype == oport->p_id_subtype) && | |
470 | (port->p_id_len == oport->p_id_len) && | |
471 | (memcmp(port->p_id, oport->p_id, port->p_id_len) == 0) && | |
472 | (chassis->c_id_subtype == oport->p_chassis->c_id_subtype) && | |
473 | (chassis->c_id_len == oport->p_chassis->c_id_len) && | |
474 | (memcmp(chassis->c_id, oport->p_chassis->c_id, | |
475 | chassis->c_id_len) == 0)) { | |
476 | ochassis = oport->p_chassis; | |
477 | break; | |
478 | } | |
43c02e7b | 479 | } |
77507b69 VB |
480 | /* No, but do we already know the system? */ |
481 | if (!oport) { | |
482 | TAILQ_FOREACH(ochassis, &cfg->g_chassis, c_entries) { | |
483 | if ((chassis->c_protocol == ochassis->c_protocol) && | |
484 | (chassis->c_id_subtype == ochassis->c_id_subtype) && | |
485 | (chassis->c_id_len == ochassis->c_id_len) && | |
486 | (memcmp(chassis->c_id, ochassis->c_id, | |
487 | chassis->c_id_len) == 0)) | |
488 | break; | |
43c02e7b | 489 | } |
43c02e7b | 490 | } |
43c02e7b | 491 | |
77507b69 VB |
492 | if (oport) { |
493 | /* The port is known, remove it before adding it back */ | |
494 | TAILQ_REMOVE(&hardware->h_rports, oport, p_entries); | |
9898ac07 | 495 | lldpd_port_cleanup(cfg, oport, 1); |
4e624dc2 | 496 | free(oport); |
77507b69 VB |
497 | } |
498 | if (ochassis) { | |
d938c51f | 499 | lldpd_move_chassis(ochassis, chassis); |
77507b69 VB |
500 | chassis = ochassis; |
501 | } else { | |
502 | /* Chassis not known, add it */ | |
503 | chassis->c_index = ++cfg->g_lastrid; | |
77507b69 VB |
504 | chassis->c_refcount = 0; |
505 | TAILQ_INSERT_TAIL(&cfg->g_chassis, chassis, c_entries); | |
f4c43902 VB |
506 | i = 0; TAILQ_FOREACH(ochassis, &cfg->g_chassis, c_entries) i++; |
507 | LLOG_DEBUG("Currently, we know %d different systems", i); | |
77507b69 VB |
508 | } |
509 | /* Add port */ | |
510 | port->p_lastchange = port->p_lastupdate = time(NULL); | |
511 | if ((port->p_lastframe = (struct lldpd_frame *)malloc(s + | |
512 | sizeof(int))) != NULL) { | |
513 | port->p_lastframe->size = s; | |
514 | memcpy(port->p_lastframe->frame, frame, s); | |
515 | } | |
516 | TAILQ_INSERT_TAIL(&hardware->h_rports, port, p_entries); | |
517 | port->p_chassis = chassis; | |
518 | port->p_chassis->c_refcount++; | |
9df5ec3d VB |
519 | /* Several cases are possible : |
520 | 1. chassis is new, its refcount was 0. It is now attached | |
521 | to this port, its refcount is 1. | |
522 | 2. chassis already exists and was attached to another | |
523 | port, we increase its refcount accordingly. | |
524 | 3. chassis already exists and was attached to the same | |
525 | port, its refcount was decreased with | |
526 | lldpd_port_cleanup() and is now increased again. | |
527 | ||
528 | In all cases, if the port already existed, it has been | |
529 | freed with lldpd_port_cleanup() and therefore, the refcount | |
530 | of the chassis that was attached to it is decreased. | |
531 | */ | |
42b39485 VB |
532 | i = 0; TAILQ_FOREACH(oport, &hardware->h_rports, p_entries) |
533 | i++; | |
534 | LLOG_DEBUG("Currently, %s knows %d neighbors", | |
f4c43902 | 535 | hardware->h_ifname, i); |
43c02e7b VB |
536 | return; |
537 | } | |
538 | ||
c036b15d VB |
539 | /* Get the output of lsb_release -s -d. This is a slow function. It should be |
540 | called once. It return NULL if any problem happens. Otherwise, this is a | |
541 | statically allocated buffer. The result includes the trailing \n */ | |
542 | static char * | |
543 | lldpd_get_lsb_release() { | |
544 | static char release[1024]; | |
545 | char *const command[] = { "lsb_release", "-s", "-d", NULL }; | |
546 | int pid, status, devnull, count; | |
547 | int pipefd[2]; | |
548 | ||
549 | if (pipe(pipefd)) { | |
550 | LLOG_WARN("unable to get a pair of pipes"); | |
551 | return NULL; | |
552 | } | |
553 | ||
554 | if ((pid = fork()) < 0) { | |
555 | LLOG_WARN("unable to fork"); | |
556 | return NULL; | |
557 | } | |
558 | switch (pid) { | |
559 | case 0: | |
560 | /* Child, exec lsb_release */ | |
561 | close(pipefd[0]); | |
562 | if ((devnull = open("/dev/null", O_RDWR, 0)) != -1) { | |
563 | dup2(devnull, STDIN_FILENO); | |
564 | dup2(devnull, STDERR_FILENO); | |
565 | dup2(pipefd[1], STDOUT_FILENO); | |
566 | if (devnull > 2) close(devnull); | |
567 | if (pipefd[1] > 2) close(pipefd[1]); | |
568 | execvp("lsb_release", command); | |
569 | } | |
570 | exit(127); | |
571 | break; | |
572 | default: | |
573 | /* Father, read the output from the children */ | |
574 | close(pipefd[1]); | |
575 | count = 0; | |
576 | do { | |
577 | status = read(pipefd[0], release+count, sizeof(release)-count); | |
578 | if ((status == -1) && (errno == EINTR)) continue; | |
579 | if (status > 0) | |
580 | count += status; | |
581 | } while (count < sizeof(release) && (status > 0)); | |
582 | if (status < 0) { | |
583 | LLOG_WARN("unable to read from lsb_release"); | |
584 | close(pipefd[0]); | |
585 | waitpid(pid, &status, 0); | |
586 | return NULL; | |
587 | } | |
588 | close(pipefd[0]); | |
589 | if (count >= sizeof(release)) { | |
590 | LLOG_INFO("output of lsb_release is too large"); | |
591 | waitpid(pid, &status, 0); | |
592 | return NULL; | |
593 | } | |
594 | status = -1; | |
595 | if (waitpid(pid, &status, 0) != pid) | |
596 | return NULL; | |
597 | if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) { | |
598 | LLOG_INFO("lsb_release information not available"); | |
599 | return NULL; | |
600 | } | |
601 | if (!count) { | |
602 | LLOG_INFO("lsb_release returned an empty string"); | |
603 | return NULL; | |
604 | } | |
605 | release[count] = '\0'; | |
606 | return release; | |
607 | } | |
608 | /* Should not be here */ | |
609 | return NULL; | |
610 | } | |
611 | ||
ae87586a MT |
612 | /* Same like lldpd_get_lsb_release but reads /etc/os-release for PRETTY_NAME=. */ |
613 | static char * | |
614 | lldpd_get_os_release() { | |
615 | static char release[1024]; | |
9757bfbc SK |
616 | char line[1024]; |
617 | char *key, *val; | |
618 | char *ptr1 = release; | |
619 | char *ptr2 = release; | |
ae87586a MT |
620 | |
621 | FILE *fp = fopen("/etc/os-release", "r"); | |
622 | if (!fp) { | |
e02afca4 | 623 | LLOG_WARN("could not open /etc/os-release"); |
ae87586a MT |
624 | return NULL; |
625 | } | |
626 | ||
ae87586a MT |
627 | while ((fgets(line, 1024, fp) != NULL)) { |
628 | key = strtok(line, "="); | |
629 | val = strtok(NULL, "="); | |
630 | ||
631 | if (strncmp(key, "PRETTY_NAME", 1024) == 0) { | |
632 | strncpy(release, val, 1024); | |
633 | break; | |
634 | } | |
635 | } | |
636 | fclose(fp); | |
637 | ||
638 | /* Remove trailing newline and all " in the string. */ | |
ae87586a MT |
639 | while (*ptr1 != 0) { |
640 | if ((*ptr1 == '"') || (*ptr1 == '\n')) { | |
641 | ++ptr1; | |
642 | } else { | |
643 | *ptr2++ = *ptr1++; | |
644 | } | |
645 | } | |
646 | *ptr2 = 0; | |
647 | ||
648 | return release; | |
649 | } | |
650 | ||
8482abe9 VB |
651 | static void |
652 | lldpd_hide_ports(struct lldpd *cfg, struct lldpd_hardware *hardware, int mask) { | |
42b39485 VB |
653 | struct lldpd_port *port; |
654 | int protocols[LLDPD_MODE_MAX+1]; | |
8482abe9 VB |
655 | char buffer[256]; |
656 | int i, j, k, found; | |
42b39485 VB |
657 | unsigned int min; |
658 | ||
8482abe9 VB |
659 | /* Compute the number of occurrences of each protocol */ |
660 | for (i = 0; i <= LLDPD_MODE_MAX; i++) protocols[i] = 0; | |
661 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) | |
662 | protocols[port->p_protocol]++; | |
663 | ||
664 | /* Turn the protocols[] array into an array of | |
665 | enabled/disabled protocols. 1 means enabled, 0 | |
666 | means disabled. */ | |
667 | min = (unsigned int)-1; | |
668 | for (i = 0; i <= LLDPD_MODE_MAX; i++) | |
669 | if (protocols[i] && (protocols[i] < min)) | |
670 | min = protocols[i]; | |
671 | found = 0; | |
672 | for (i = 0; i <= LLDPD_MODE_MAX; i++) | |
673 | if ((protocols[i] == min) && !found) { | |
674 | /* If we need a tie breaker, we take | |
675 | the first protocol only */ | |
676 | if (cfg->g_smart & mask & | |
677 | (SMART_OUTGOING_ONE_PROTO | SMART_INCOMING_ONE_PROTO)) | |
678 | found = 1; | |
679 | protocols[i] = 1; | |
680 | } else protocols[i] = 0; | |
681 | ||
682 | /* We set the p_hidden flag to 1 if the protocol is disabled */ | |
683 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) { | |
684 | if (mask == SMART_OUTGOING) | |
685 | port->p_hidden_out = protocols[port->p_protocol]?0:1; | |
686 | else | |
687 | port->p_hidden_in = protocols[port->p_protocol]?0:1; | |
688 | } | |
689 | ||
690 | /* If we want only one neighbor, we take the first one */ | |
691 | if (cfg->g_smart & mask & | |
692 | (SMART_OUTGOING_ONE_NEIGH | SMART_INCOMING_ONE_NEIGH)) { | |
42b39485 | 693 | found = 0; |
8482abe9 VB |
694 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) { |
695 | if (mask == SMART_OUTGOING) { | |
696 | if (found) port->p_hidden_out = 1; | |
697 | if (!port->p_hidden_out) | |
698 | found = 1; | |
699 | } | |
700 | if (mask == SMART_INCOMING) { | |
701 | if (found) port->p_hidden_in = 1; | |
702 | if (!port->p_hidden_in) | |
42b39485 | 703 | found = 1; |
42b39485 VB |
704 | } |
705 | } | |
8482abe9 | 706 | } |
42b39485 | 707 | |
8482abe9 VB |
708 | /* Print a debug message summarizing the operation */ |
709 | for (i = 0; i <= LLDPD_MODE_MAX; i++) protocols[i] = 0; | |
710 | k = j = 0; | |
711 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) { | |
712 | if (!(((mask == SMART_OUTGOING) && port->p_hidden_out) || | |
713 | ((mask == SMART_INCOMING) && port->p_hidden_in))) { | |
714 | k++; | |
715 | protocols[port->p_protocol] = 1; | |
42b39485 | 716 | } |
8482abe9 VB |
717 | j++; |
718 | } | |
719 | buffer[0] = '\0'; | |
720 | for (i=0; cfg->g_protocols[i].mode != 0; i++) { | |
721 | if (cfg->g_protocols[i].enabled && protocols[cfg->g_protocols[i].mode]) { | |
722 | if (strlen(buffer) + | |
723 | strlen(cfg->g_protocols[i].name) + 3 > sizeof(buffer)) { | |
724 | /* Unlikely, our buffer is too small */ | |
725 | memcpy(buffer + sizeof(buffer) - 4, "...", 4); | |
726 | break; | |
42b39485 | 727 | } |
8482abe9 VB |
728 | if (buffer[0]) |
729 | strcat(buffer, ", "); | |
730 | strcat(buffer, cfg->g_protocols[i].name); | |
42b39485 VB |
731 | } |
732 | } | |
8482abe9 VB |
733 | LLOG_DEBUG("[%s] %s: %d visible neigh / %d. Protocols: %s.", |
734 | (mask == SMART_OUTGOING)?"out filter":"in filter", | |
735 | hardware->h_ifname, k, j, buffer[0]?buffer:"(none)"); | |
42b39485 VB |
736 | } |
737 | ||
566c635d VB |
738 | /* Hide unwanted ports depending on smart mode set by the user */ |
739 | static void | |
740 | lldpd_hide_all(struct lldpd *cfg) | |
741 | { | |
742 | struct lldpd_hardware *hardware; | |
743 | ||
744 | if (!cfg->g_smart) | |
745 | return; | |
746 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { | |
747 | if (cfg->g_smart & SMART_INCOMING_FILTER) | |
748 | lldpd_hide_ports(cfg, hardware, SMART_INCOMING); | |
749 | if (cfg->g_smart & SMART_OUTGOING_FILTER) | |
750 | lldpd_hide_ports(cfg, hardware, SMART_OUTGOING); | |
751 | } | |
752 | } | |
753 | ||
d6e889b6 VB |
754 | void |
755 | lldpd_recv(struct lldpd *cfg, struct lldpd_hardware *hardware, int fd) | |
43c02e7b | 756 | { |
d6e889b6 VB |
757 | char *buffer = NULL; |
758 | int n; | |
759 | if ((buffer = (char *)malloc(hardware->h_mtu)) == NULL) { | |
760 | LLOG_WARN("failed to alloc reception buffer"); | |
761 | return; | |
762 | } | |
763 | if ((n = hardware->h_ops->recv(cfg, hardware, | |
764 | fd, buffer, | |
765 | hardware->h_mtu)) == -1) { | |
766 | free(buffer); | |
767 | return; | |
768 | } | |
769 | hardware->h_rx_cnt++; | |
770 | lldpd_decode(cfg, buffer, n, hardware); | |
771 | lldpd_hide_all(cfg); /* Immediatly hide */ | |
772 | free(buffer); | |
43c02e7b VB |
773 | } |
774 | ||
8888d191 | 775 | static void |
43c02e7b VB |
776 | lldpd_send_all(struct lldpd *cfg) |
777 | { | |
778 | struct lldpd_hardware *hardware; | |
77507b69 | 779 | struct lldpd_port *port; |
0d86e62f | 780 | int i, sent; |
f7db0dd8 | 781 | |
43c02e7b | 782 | cfg->g_lastsent = time(NULL); |
c520cb14 | 783 | if (cfg->g_receiveonly) return; |
43c02e7b VB |
784 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { |
785 | /* Ignore if interface is down */ | |
6e75df87 | 786 | if ((hardware->h_flags & IFF_RUNNING) == 0) |
43c02e7b VB |
787 | continue; |
788 | ||
0d86e62f | 789 | sent = 0; |
43c02e7b VB |
790 | for (i=0; cfg->g_protocols[i].mode != 0; i++) { |
791 | if (!cfg->g_protocols[i].enabled) | |
792 | continue; | |
77507b69 | 793 | /* We send only if we have at least one remote system |
0c877af0 VB |
794 | * speaking this protocol or if the protocol is forced */ |
795 | if (cfg->g_protocols[i].enabled > 1) { | |
796 | cfg->g_protocols[i].send(cfg, hardware); | |
797 | sent++; | |
798 | continue; | |
799 | } | |
77507b69 | 800 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) { |
42b39485 VB |
801 | /* If this remote port is disabled, we don't |
802 | * consider it */ | |
4d1a5b39 | 803 | if (port->p_hidden_out) |
42b39485 | 804 | continue; |
77507b69 VB |
805 | if (port->p_protocol == |
806 | cfg->g_protocols[i].mode) { | |
807 | cfg->g_protocols[i].send(cfg, | |
808 | hardware); | |
0c877af0 | 809 | sent++; |
77507b69 VB |
810 | break; |
811 | } | |
812 | } | |
43c02e7b | 813 | } |
77507b69 VB |
814 | |
815 | if (!sent) | |
816 | /* Nothing was sent for this port, let's speak LLDP */ | |
817 | cfg->g_protocols[0].send(cfg, | |
818 | hardware); | |
43c02e7b VB |
819 | } |
820 | } | |
821 | ||
89840df0 | 822 | #ifdef ENABLE_LLDPMED |
8888d191 | 823 | static void |
89840df0 VB |
824 | lldpd_med(struct lldpd_chassis *chassis) |
825 | { | |
0265b1e5 | 826 | #if __i386__ || __amd64__ |
55606d4b VB |
827 | static short int once = 0; |
828 | if (!once) { | |
829 | chassis->c_med_hw = dmi_hw(); | |
830 | chassis->c_med_fw = dmi_fw(); | |
831 | chassis->c_med_sn = dmi_sn(); | |
832 | chassis->c_med_manuf = dmi_manuf(); | |
833 | chassis->c_med_model = dmi_model(); | |
834 | chassis->c_med_asset = dmi_asset(); | |
835 | once = 1; | |
836 | } | |
0265b1e5 | 837 | #endif |
89840df0 VB |
838 | } |
839 | #endif | |
840 | ||
8888d191 | 841 | static void |
6e75df87 | 842 | lldpd_update_localchassis(struct lldpd *cfg) |
43c02e7b | 843 | { |
6e75df87 VB |
844 | struct utsname un; |
845 | char *hp; | |
43c02e7b VB |
846 | int f; |
847 | char status; | |
43c02e7b VB |
848 | |
849 | /* Set system name and description */ | |
6e75df87 | 850 | if (uname(&un) != 0) |
43c02e7b | 851 | fatal("failed to get system information"); |
b5562b23 | 852 | if ((hp = priv_gethostbyname()) == NULL) |
43c02e7b | 853 | fatal("failed to get system name"); |
77507b69 VB |
854 | free(LOCAL_CHASSIS(cfg)->c_name); |
855 | free(LOCAL_CHASSIS(cfg)->c_descr); | |
856 | if ((LOCAL_CHASSIS(cfg)->c_name = strdup(hp)) == NULL) | |
249644a4 | 857 | fatal(NULL); |
40ce835b ST |
858 | if (cfg->g_descr_override) { |
859 | if (asprintf(&LOCAL_CHASSIS(cfg)->c_descr, "%s", | |
860 | cfg->g_descr_override) == -1) | |
de1b1b3a | 861 | fatal("failed to set full system description"); |
40ce835b ST |
862 | } else { |
863 | if (cfg->g_advertise_version) { | |
a9db9b44 | 864 | if (asprintf(&LOCAL_CHASSIS(cfg)->c_descr, "%s %s %s %s %s", |
c036b15d | 865 | cfg->g_lsb_release?cfg->g_lsb_release:"", |
a9db9b44 | 866 | un.sysname, un.release, un.version, un.machine) |
40ce835b ST |
867 | == -1) |
868 | fatal("failed to set full system description"); | |
869 | } else { | |
870 | if (asprintf(&LOCAL_CHASSIS(cfg)->c_descr, "%s", | |
c036b15d | 871 | cfg->g_lsb_release?cfg->g_lsb_release:un.sysname) == -1) |
40ce835b ST |
872 | fatal("failed to set minimal system description"); |
873 | } | |
874 | } | |
43c02e7b VB |
875 | |
876 | /* Check forwarding */ | |
b5562b23 | 877 | if ((f = priv_open("/proc/sys/net/ipv4/ip_forward")) >= 0) { |
e5c5ae41 VB |
878 | if ((read(f, &status, 1) == 1) && (status == '1')) |
879 | LOCAL_CHASSIS(cfg)->c_cap_enabled |= LLDP_CAP_ROUTER; | |
880 | else | |
881 | LOCAL_CHASSIS(cfg)->c_cap_enabled &= ~LLDP_CAP_ROUTER; | |
43c02e7b VB |
882 | close(f); |
883 | } | |
89840df0 | 884 | #ifdef ENABLE_LLDPMED |
77507b69 VB |
885 | if (LOCAL_CHASSIS(cfg)->c_cap_available & LLDP_CAP_TELEPHONE) |
886 | LOCAL_CHASSIS(cfg)->c_cap_enabled |= LLDP_CAP_TELEPHONE; | |
887 | lldpd_med(LOCAL_CHASSIS(cfg)); | |
888 | free(LOCAL_CHASSIS(cfg)->c_med_sw); | |
de1b1b3a VB |
889 | if (cfg->g_advertise_version) |
890 | LOCAL_CHASSIS(cfg)->c_med_sw = strdup(un.release); | |
891 | else | |
892 | LOCAL_CHASSIS(cfg)->c_med_sw = strdup("Unknown"); | |
89840df0 | 893 | #endif |
43c02e7b | 894 | |
b4ac8083 VB |
895 | /* Set chassis ID if needed. This is only done if chassis ID |
896 | has not been set previously (with the MAC address of an | |
897 | interface for example) | |
898 | */ | |
899 | if (LOCAL_CHASSIS(cfg)->c_id == NULL) { | |
900 | if (!(LOCAL_CHASSIS(cfg)->c_id = strdup(LOCAL_CHASSIS(cfg)->c_name))) | |
6e75df87 | 901 | fatal(NULL); |
b4ac8083 VB |
902 | LOCAL_CHASSIS(cfg)->c_id_len = strlen(LOCAL_CHASSIS(cfg)->c_name); |
903 | LOCAL_CHASSIS(cfg)->c_id_subtype = LLDP_CHASSISID_SUBTYPE_LOCAL; | |
6e75df87 VB |
904 | } |
905 | } | |
906 | ||
907 | static void | |
908 | lldpd_update_localports(struct lldpd *cfg) | |
909 | { | |
910 | struct ifaddrs *ifap; | |
911 | struct lldpd_hardware *hardware; | |
912 | lldpd_ifhandlers ifhs[] = { | |
ba85f9f4 | 913 | lldpd_ifh_whitelist, /* Is the interface whitelisted? */ |
849954d7 | 914 | lldpd_ifh_bond, /* Handle bond */ |
6e75df87 | 915 | lldpd_ifh_eth, /* Handle classic ethernet interfaces */ |
5994b27d | 916 | #ifdef ENABLE_DOT1 |
6e75df87 | 917 | lldpd_ifh_vlan, /* Handle VLAN */ |
5994b27d | 918 | #endif |
6e75df87 | 919 | lldpd_ifh_mgmt, /* Handle management address (if not already handled) */ |
b4ac8083 | 920 | lldpd_ifh_chassis, /* Handle chassis ID (if not already handled) */ |
6e75df87 VB |
921 | NULL |
922 | }; | |
923 | lldpd_ifhandlers *ifh; | |
924 | ||
925 | /* h_flags is set to 0 for each port. If the port is updated, h_flags | |
926 | * will be set to a non-zero value. This will allow us to clean up any | |
927 | * non up-to-date port */ | |
43c02e7b VB |
928 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) |
929 | hardware->h_flags = 0; | |
930 | ||
6e75df87 VB |
931 | if (getifaddrs(&ifap) != 0) |
932 | fatal("lldpd_update_localports: failed to get interface list"); | |
933 | ||
934 | /* We will run the list of interfaces through a list of interface | |
935 | * handlers. Each handler will create or update some hardware port (and | |
936 | * will set h_flags to a non zero value. The handler can use the list of | |
937 | * interfaces but this is not mandatory. If the interface handler | |
938 | * handles an interface from the list, it should set ifa_flags to 0 to | |
939 | * let know the other handlers that it took care of this interface. This | |
940 | * means that more specific handlers should be before less specific | |
941 | * ones. */ | |
942 | for (ifh = ifhs; *ifh != NULL; ifh++) | |
943 | (*ifh)(cfg, ifap); | |
43c02e7b | 944 | freeifaddrs(ifap); |
6e75df87 | 945 | } |
43c02e7b | 946 | |
d6e889b6 | 947 | void |
6e75df87 VB |
948 | lldpd_loop(struct lldpd *cfg) |
949 | { | |
950 | /* Main loop. | |
951 | ||
952 | 1. Update local ports information | |
953 | 2. Clean unwanted (removed) local ports | |
954 | 3. Update local chassis information | |
955 | 4. Send packets | |
d6e889b6 | 956 | 5. Update events |
6e75df87 | 957 | */ |
849954d7 | 958 | LOCAL_CHASSIS(cfg)->c_cap_enabled = 0; |
6e75df87 | 959 | lldpd_update_localports(cfg); |
43c02e7b | 960 | lldpd_cleanup(cfg); |
6e75df87 | 961 | lldpd_update_localchassis(cfg); |
c520cb14 | 962 | lldpd_send_all(cfg); |
43c02e7b VB |
963 | } |
964 | ||
8888d191 | 965 | static void |
d6e889b6 | 966 | lldpd_exit(struct lldpd *cfg) |
43c02e7b | 967 | { |
6e75df87 | 968 | struct lldpd_hardware *hardware, *hardware_next; |
d6e889b6 | 969 | close(cfg->g_ctl); |
b5562b23 | 970 | priv_ctl_cleanup(); |
d6e889b6 | 971 | for (hardware = TAILQ_FIRST(&cfg->g_hardware); hardware != NULL; |
6e75df87 VB |
972 | hardware = hardware_next) { |
973 | hardware_next = TAILQ_NEXT(hardware, h_entries); | |
d6e889b6 VB |
974 | lldpd_remote_cleanup(cfg, hardware, 1); |
975 | lldpd_hardware_cleanup(cfg, hardware); | |
43c02e7b | 976 | } |
43c02e7b VB |
977 | } |
978 | ||
8482abe9 VB |
979 | struct intint { int a; int b; }; |
980 | static const struct intint filters[] = { | |
981 | { 0, 0 }, | |
982 | { 1, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | | |
983 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
984 | { 2, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO }, | |
985 | { 3, SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
986 | { 4, SMART_INCOMING_FILTER | SMART_OUTGOING_FILTER }, | |
987 | { 5, SMART_INCOMING_FILTER }, | |
988 | { 6, SMART_OUTGOING_FILTER }, | |
989 | { 7, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | SMART_INCOMING_ONE_NEIGH | | |
990 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
991 | { 8, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | SMART_INCOMING_ONE_NEIGH }, | |
992 | { 9, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH | | |
993 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
994 | { 10, SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
995 | { 11, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH }, | |
996 | { 12, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH | | |
997 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
998 | { 13, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH | | |
999 | SMART_OUTGOING_FILTER }, | |
1000 | { 14, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | | |
1001 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
1002 | { 15, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | | |
1003 | SMART_OUTGOING_FILTER }, | |
1004 | { 16, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | SMART_INCOMING_ONE_NEIGH | | |
1005 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
1006 | { 17, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | SMART_INCOMING_ONE_NEIGH | | |
1007 | SMART_OUTGOING_FILTER }, | |
1008 | { 18, SMART_INCOMING_FILTER | | |
1009 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
1010 | { 19, SMART_INCOMING_FILTER | | |
1011 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
1012 | { -1, 0 } | |
1013 | }; | |
1014 | ||
43c02e7b | 1015 | int |
2acc1418 | 1016 | lldpd_main(int argc, char *argv[]) |
43c02e7b VB |
1017 | { |
1018 | struct lldpd *cfg; | |
77507b69 | 1019 | struct lldpd_chassis *lchassis; |
e809a587 VB |
1020 | int ch, debug = 0; |
1021 | #ifdef USE_SNMP | |
1022 | int snmp = 0; | |
bbea66e1 | 1023 | char *agentx = NULL; /* AgentX socket */ |
e809a587 | 1024 | #endif |
d4e4c804 | 1025 | char *mgmtp = NULL; |
5339e725 | 1026 | char *cidp = NULL; |
ba85f9f4 | 1027 | char *interfaces = NULL; |
993a6e50 | 1028 | char *popt, opts[] = |
e6b36c87 | 1029 | "H:hkrdxX:m:4:6:I:C:p:M:P:S:i@ "; |
de1b1b3a | 1030 | int i, found, advertise_version = 1; |
89840df0 | 1031 | #ifdef ENABLE_LLDPMED |
e809a587 | 1032 | int lldpmed = 0, noinventory = 0; |
89840df0 | 1033 | #endif |
d4afb919 VB |
1034 | char *descr_override = NULL; |
1035 | char *platform_override = NULL; | |
c036b15d | 1036 | char *lsb_release = NULL; |
8482abe9 | 1037 | int smart = 15; |
537a8043 | 1038 | int receiveonly = 0; |
43c02e7b VB |
1039 | |
1040 | saved_argv = argv; | |
1041 | ||
1042 | /* | |
1043 | * Get and parse command line options | |
1044 | */ | |
f0bd3505 | 1045 | popt = strchr(opts, '@'); |
0c877af0 | 1046 | for (i=0; protos[i].mode != 0; i++) |
43c02e7b | 1047 | *(popt++) = protos[i].arg; |
43c02e7b VB |
1048 | *popt = '\0'; |
1049 | while ((ch = getopt(argc, argv, opts)) != -1) { | |
1050 | switch (ch) { | |
b162b740 VB |
1051 | case 'h': |
1052 | usage(); | |
1053 | break; | |
43c02e7b VB |
1054 | case 'd': |
1055 | debug++; | |
1056 | break; | |
537a8043 VB |
1057 | case 'r': |
1058 | receiveonly = 1; | |
1059 | break; | |
d4e4c804 | 1060 | case 'm': |
43c02e7b VB |
1061 | mgmtp = optarg; |
1062 | break; | |
ba85f9f4 VB |
1063 | case 'I': |
1064 | interfaces = optarg; | |
1065 | break; | |
5339e725 VB |
1066 | case 'C': |
1067 | cidp = optarg; | |
1068 | break; | |
de1b1b3a VB |
1069 | case 'k': |
1070 | advertise_version = 0; | |
1071 | break; | |
e809a587 | 1072 | #ifdef ENABLE_LLDPMED |
115ff55c | 1073 | case 'M': |
89840df0 | 1074 | lldpmed = atoi(optarg); |
e809a587 VB |
1075 | if ((lldpmed < 1) || (lldpmed > 4)) { |
1076 | fprintf(stderr, "-M requires an argument between 1 and 4\n"); | |
89840df0 | 1077 | usage(); |
e809a587 | 1078 | } |
89840df0 | 1079 | break; |
e809a587 | 1080 | case 'i': |
e809a587 | 1081 | noinventory = 1; |
115ff55c | 1082 | break; |
e809a587 | 1083 | #else |
115ff55c VB |
1084 | case 'M': |
1085 | case 'i': | |
e809a587 VB |
1086 | fprintf(stderr, "LLDP-MED support is not built-in\n"); |
1087 | usage(); | |
e809a587 | 1088 | break; |
115ff55c | 1089 | #endif |
e809a587 | 1090 | #ifdef USE_SNMP |
bbea66e1 V |
1091 | case 'x': |
1092 | snmp = 1; | |
1093 | break; | |
1094 | case 'X': | |
43c02e7b | 1095 | snmp = 1; |
bbea66e1 V |
1096 | agentx = optarg; |
1097 | break; | |
e809a587 | 1098 | #else |
bbea66e1 V |
1099 | case 'x': |
1100 | case 'X': | |
e809a587 VB |
1101 | fprintf(stderr, "SNMP support is not built-in\n"); |
1102 | usage(); | |
1103 | #endif | |
43c02e7b | 1104 | break; |
40ce835b ST |
1105 | case 'S': |
1106 | descr_override = strdup(optarg); | |
1107 | break; | |
d4afb919 VB |
1108 | case 'P': |
1109 | platform_override = strdup(optarg); | |
1110 | break; | |
42b39485 | 1111 | case 'H': |
8482abe9 | 1112 | smart = atoi(optarg); |
42b39485 | 1113 | break; |
43c02e7b VB |
1114 | default: |
1115 | found = 0; | |
1116 | for (i=0; protos[i].mode != 0; i++) { | |
43c02e7b | 1117 | if (ch == protos[i].arg) { |
0c877af0 VB |
1118 | protos[i].enabled++; |
1119 | /* When an argument enable | |
1120 | several protocols, only the | |
1121 | first one can be forced. */ | |
1122 | if (found && protos[i].enabled > 1) | |
1123 | protos[i].enabled = 1; | |
43c02e7b VB |
1124 | found = 1; |
1125 | } | |
1126 | } | |
1127 | if (!found) | |
1128 | usage(); | |
1129 | } | |
1130 | } | |
8482abe9 VB |
1131 | |
1132 | /* Set correct smart mode */ | |
1133 | for (i=0; (filters[i].a != -1) && (filters[i].a != smart); i++); | |
1134 | if (filters[i].a == -1) { | |
1135 | fprintf(stderr, "Incorrect mode for -H\n"); | |
1136 | usage(); | |
1137 | } | |
1138 | smart = filters[i].b; | |
115ff55c | 1139 | |
6bb9c4e0 | 1140 | log_init(debug, __progname); |
4b9a5a23 | 1141 | tzset(); /* Get timezone info before chroot */ |
a2993d83 | 1142 | |
eac2f38a VB |
1143 | if (!debug) { |
1144 | int pid; | |
1145 | char *spid; | |
1146 | if (daemon(0, 0) != 0) | |
1147 | fatal("failed to detach daemon"); | |
1148 | if ((pid = open(LLDPD_PID_FILE, | |
0aa5f676 | 1149 | O_TRUNC | O_CREAT | O_WRONLY, 0644)) == -1) |
eac2f38a VB |
1150 | fatal("unable to open pid file " LLDPD_PID_FILE); |
1151 | if (asprintf(&spid, "%d\n", getpid()) == -1) | |
1152 | fatal("unable to create pid file " LLDPD_PID_FILE); | |
1153 | if (write(pid, spid, strlen(spid)) == -1) | |
1154 | fatal("unable to write pid file " LLDPD_PID_FILE); | |
1155 | free(spid); | |
1156 | close(pid); | |
1157 | } | |
1158 | ||
ae87586a MT |
1159 | /* Try to read system information from /etc/os-release if possible. |
1160 | Fall back to lsb_release for compatibility. */ | |
1161 | lsb_release = lldpd_get_os_release(); | |
1162 | if (!lsb_release) { | |
1163 | lsb_release = lldpd_get_lsb_release(); | |
1164 | } | |
c036b15d | 1165 | |
a2993d83 | 1166 | priv_init(PRIVSEP_CHROOT); |
43c02e7b | 1167 | |
d6e889b6 | 1168 | /* Initialization of global configuration */ |
43c02e7b VB |
1169 | if ((cfg = (struct lldpd *) |
1170 | calloc(1, sizeof(struct lldpd))) == NULL) | |
1171 | fatal(NULL); | |
1172 | ||
766f32b3 | 1173 | cfg->g_mgmt_pattern = mgmtp; |
5339e725 | 1174 | cfg->g_cid_pattern = cidp; |
ba85f9f4 | 1175 | cfg->g_interfaces = interfaces; |
42b39485 | 1176 | cfg->g_smart = smart; |
537a8043 | 1177 | cfg->g_receiveonly = receiveonly; |
d6e889b6 VB |
1178 | #ifdef USE_SNMP |
1179 | cfg->g_snmp = snmp; | |
1180 | cfg->g_snmp_agentx = agentx; | |
1181 | #endif /* USE_SNMP */ | |
43c02e7b VB |
1182 | |
1183 | /* Get ioctl socket */ | |
1184 | if ((cfg->g_sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) | |
1185 | fatal("failed to get ioctl socket"); | |
1186 | cfg->g_delay = LLDPD_TX_DELAY; | |
1187 | ||
c036b15d | 1188 | /* Description */ |
bf89e7e0 | 1189 | if (!(cfg->g_advertise_version = advertise_version) && lsb_release) |
c036b15d VB |
1190 | /* Remove the \n */ |
1191 | lsb_release[strlen(lsb_release) - 1] = '\0'; | |
1192 | cfg->g_lsb_release = lsb_release; | |
40ce835b ST |
1193 | if (descr_override) |
1194 | cfg->g_descr_override = descr_override; | |
1195 | ||
d4afb919 VB |
1196 | if (platform_override) |
1197 | cfg->g_platform_override = platform_override; | |
1198 | ||
43c02e7b | 1199 | /* Set system capabilities */ |
77507b69 VB |
1200 | if ((lchassis = (struct lldpd_chassis*) |
1201 | calloc(1, sizeof(struct lldpd_chassis))) == NULL) | |
1202 | fatal(NULL); | |
1203 | lchassis->c_cap_available = LLDP_CAP_BRIDGE | LLDP_CAP_WLAN | | |
43c02e7b | 1204 | LLDP_CAP_ROUTER; |
e6b36c87 | 1205 | TAILQ_INIT(&lchassis->c_mgmt); |
89840df0 VB |
1206 | #ifdef ENABLE_LLDPMED |
1207 | if (lldpmed > 0) { | |
1208 | if (lldpmed == LLDPMED_CLASS_III) | |
77507b69 VB |
1209 | lchassis->c_cap_available |= LLDP_CAP_TELEPHONE; |
1210 | lchassis->c_med_type = lldpmed; | |
1211 | lchassis->c_med_cap_available = LLDPMED_CAP_CAP | | |
4c0d2715 VB |
1212 | LLDPMED_CAP_IV | LLDPMED_CAP_LOCATION | |
1213 | LLDPMED_CAP_POLICY | LLDPMED_CAP_MDI_PSE | LLDPMED_CAP_MDI_PD; | |
740593ff | 1214 | cfg->g_noinventory = noinventory; |
42bddd41 VB |
1215 | } else |
1216 | cfg->g_noinventory = 1; | |
89840df0 | 1217 | #endif |
43c02e7b VB |
1218 | |
1219 | /* Set TTL */ | |
77507b69 | 1220 | lchassis->c_ttl = LLDPD_TTL; |
43c02e7b VB |
1221 | |
1222 | cfg->g_protocols = protos; | |
43c02e7b | 1223 | for (i=0; protos[i].mode != 0; i++) |
0c877af0 VB |
1224 | if (protos[i].enabled > 1) |
1225 | LLOG_INFO("protocol %s enabled and forced", protos[i].name); | |
1226 | else if (protos[i].enabled) | |
43c02e7b | 1227 | LLOG_INFO("protocol %s enabled", protos[i].name); |
0c877af0 | 1228 | else |
43c02e7b | 1229 | LLOG_INFO("protocol %s disabled", protos[i].name); |
43c02e7b VB |
1230 | |
1231 | TAILQ_INIT(&cfg->g_hardware); | |
77507b69 VB |
1232 | TAILQ_INIT(&cfg->g_chassis); |
1233 | TAILQ_INSERT_TAIL(&cfg->g_chassis, lchassis, c_entries); | |
9898ac07 | 1234 | lchassis->c_refcount++; /* We should always keep a reference to local chassis */ |
43c02e7b | 1235 | |
43c02e7b | 1236 | /* Create socket */ |
6f1046d1 | 1237 | if ((cfg->g_ctl = priv_ctl_create()) == -1) |
b5562b23 | 1238 | fatalx("unable to create control socket " LLDPD_CTL_SOCKET); |
43c02e7b | 1239 | |
d6e889b6 VB |
1240 | /* Main loop */ |
1241 | levent_loop(cfg); | |
1242 | lldpd_exit(cfg); | |
43c02e7b VB |
1243 | |
1244 | return (0); | |
1245 | } |