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Commit | Line | Data |
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43c02e7b VB |
1 | /* |
2 | * Copyright (c) 2008 Vincent Bernat <bernat@luffy.cx> | |
3 | * | |
51434125 | 4 | * Permission to use, copy, modify, and/or distribute this software for any |
43c02e7b VB |
5 | * purpose with or without fee is hereby granted, provided that the above |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
17 | #include "lldpd.h" | |
18 | ||
19 | #include <stdio.h> | |
20 | #include <unistd.h> | |
21 | #include <errno.h> | |
22 | #include <signal.h> | |
23 | #include <sys/stat.h> | |
24 | #include <fcntl.h> | |
43c02e7b | 25 | #include <time.h> |
a2993d83 | 26 | #include <libgen.h> |
43c02e7b VB |
27 | #include <sys/utsname.h> |
28 | #include <sys/types.h> | |
c036b15d | 29 | #include <sys/wait.h> |
43c02e7b VB |
30 | #include <sys/socket.h> |
31 | #include <sys/select.h> | |
32 | #include <sys/time.h> | |
33 | #include <sys/ioctl.h> | |
34 | #include <arpa/inet.h> | |
43c02e7b | 35 | #include <net/if_arp.h> |
43c02e7b | 36 | |
bc598c23 VB |
37 | #if LLDPD_FD_SETSIZE != FD_SETSIZE |
38 | # warning "FD_SETSIZE is set to an inconsistent value." | |
39 | #endif | |
40 | ||
43c02e7b VB |
41 | #ifdef USE_SNMP |
42 | #include <net-snmp/net-snmp-config.h> | |
43 | #include <net-snmp/net-snmp-includes.h> | |
44 | #include <net-snmp/agent/net-snmp-agent-includes.h> | |
45 | #include <net-snmp/agent/snmp_vars.h> | |
46 | #endif /* USE_SNMP */ | |
47 | ||
8888d191 | 48 | static void usage(void); |
43c02e7b | 49 | |
8888d191 | 50 | static struct protocol protos[] = |
43c02e7b | 51 | { |
0c877af0 | 52 | { LLDPD_MODE_LLDP, 1, "LLDP", 'l', lldp_send, lldp_decode, NULL, |
f2dcb180 | 53 | LLDP_MULTICAST_ADDR }, |
4bad1937 | 54 | #ifdef ENABLE_CDP |
43c02e7b | 55 | { LLDPD_MODE_CDPV1, 0, "CDPv1", 'c', cdpv1_send, cdp_decode, cdpv1_guess, |
f2dcb180 | 56 | CDP_MULTICAST_ADDR }, |
43c02e7b | 57 | { LLDPD_MODE_CDPV2, 0, "CDPv2", 'c', cdpv2_send, cdp_decode, cdpv2_guess, |
f2dcb180 | 58 | CDP_MULTICAST_ADDR }, |
4bad1937 VB |
59 | #endif |
60 | #ifdef ENABLE_SONMP | |
43c02e7b | 61 | { LLDPD_MODE_SONMP, 0, "SONMP", 's', sonmp_send, sonmp_decode, NULL, |
f2dcb180 | 62 | SONMP_MULTICAST_ADDR }, |
4bad1937 VB |
63 | #endif |
64 | #ifdef ENABLE_EDP | |
43c02e7b | 65 | { LLDPD_MODE_EDP, 0, "EDP", 'e', edp_send, edp_decode, NULL, |
f2dcb180 | 66 | EDP_MULTICAST_ADDR }, |
4bad1937 VB |
67 | #endif |
68 | #ifdef ENABLE_FDP | |
031118c4 | 69 | { LLDPD_MODE_FDP, 0, "FDP", 'f', fdp_send, cdp_decode, NULL, |
f2dcb180 | 70 | FDP_MULTICAST_ADDR }, |
4bad1937 | 71 | #endif |
43c02e7b | 72 | { 0, 0, "any", ' ', NULL, NULL, NULL, |
f2dcb180 | 73 | {0,0,0,0,0,0} } |
43c02e7b VB |
74 | }; |
75 | ||
8888d191 | 76 | static char **saved_argv; |
6bb9c4e0 VB |
77 | #ifdef HAVE___PROGNAME |
78 | extern const char *__progname; | |
79 | #else | |
80 | # define __progname "lldpd" | |
81 | #endif | |
43c02e7b | 82 | |
8888d191 | 83 | static void |
43c02e7b VB |
84 | usage(void) |
85 | { | |
53132616 VB |
86 | fprintf(stderr, "Usage: %s [OPTIONS ...]\n", __progname); |
87 | ||
88 | fprintf(stderr, "\n"); | |
89 | ||
90 | fprintf(stderr, "-d Do not daemonize.\n"); | |
5e64a80e | 91 | fprintf(stderr, "-r Receive-only mode\n"); |
53132616 VB |
92 | fprintf(stderr, "-i Disable LLDP-MED inventory TLV transmission.\n"); |
93 | fprintf(stderr, "-k Disable advertising of kernel release, version, machine.\n"); | |
fde7a7ce | 94 | fprintf(stderr, "-S descr Override the default system description.\n"); |
d4afb919 | 95 | fprintf(stderr, "-P name Override the default hardware platform.\n"); |
53132616 | 96 | fprintf(stderr, "-m IP Specify the management address of this system.\n"); |
42b39485 | 97 | fprintf(stderr, "-H mode Specify the behaviour when detecting multiple neighbors.\n"); |
fbda1f9f | 98 | fprintf(stderr, "-I iface Limit interfaces to use.\n"); |
8347587d | 99 | #ifdef ENABLE_LLDPMED |
53132616 VB |
100 | fprintf(stderr, "-M class Enable emission of LLDP-MED frame. 'class' should be one of:\n"); |
101 | fprintf(stderr, " 1 Generic Endpoint (Class I)\n"); | |
102 | fprintf(stderr, " 2 Media Endpoint (Class II)\n"); | |
103 | fprintf(stderr, " 3 Communication Device Endpoints (Class III)\n"); | |
104 | fprintf(stderr, " 4 Network Connectivity Device\n"); | |
8347587d VB |
105 | #endif |
106 | #ifdef USE_SNMP | |
53132616 | 107 | fprintf(stderr, "-x Enable SNMP subagent.\n"); |
53132616 VB |
108 | #endif |
109 | fprintf(stderr, "\n"); | |
110 | ||
8347587d VB |
111 | #if defined ENABLE_CDP || defined ENABLE_EDP || defined ENABLE_FDP || defined ENABLE_SONMP |
112 | fprintf(stderr, "Additional protocol support.\n"); | |
113 | #ifdef ENABLE_CDP | |
53132616 | 114 | fprintf(stderr, "-c Enable the support of CDP protocol. (Cisco)\n"); |
8347587d VB |
115 | #endif |
116 | #ifdef ENABLE_EDP | |
53132616 | 117 | fprintf(stderr, "-e Enable the support of EDP protocol. (Extreme)\n"); |
8347587d VB |
118 | #endif |
119 | #ifdef ENABLE_FDP | |
53132616 | 120 | fprintf(stderr, "-f Enable the support of FDP protocol. (Foundry)\n"); |
8347587d VB |
121 | #endif |
122 | #ifdef ENABLE_SONMP | |
53132616 | 123 | fprintf(stderr, "-s Enable the support of SONMP protocol. (Nortel)\n"); |
8347587d | 124 | #endif |
53132616 VB |
125 | |
126 | fprintf(stderr, "\n"); | |
8347587d | 127 | #endif |
53132616 | 128 | |
e809a587 | 129 | fprintf(stderr, "see manual page lldpd(8) for more information\n"); |
43c02e7b VB |
130 | exit(1); |
131 | } | |
132 | ||
6e75df87 | 133 | struct lldpd_hardware * |
44002d66 | 134 | lldpd_get_hardware(struct lldpd *cfg, char *name, int index, struct lldpd_ops *ops) |
43c02e7b | 135 | { |
6e75df87 VB |
136 | struct lldpd_hardware *hardware; |
137 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { | |
849954d7 | 138 | if ((strcmp(hardware->h_ifname, name) == 0) && |
44002d66 | 139 | (hardware->h_ifindex == index) && |
849954d7 | 140 | ((!ops) || (ops == hardware->h_ops))) |
6e75df87 | 141 | break; |
43c02e7b | 142 | } |
6e75df87 | 143 | return hardware; |
43c02e7b VB |
144 | } |
145 | ||
6e75df87 VB |
146 | struct lldpd_hardware * |
147 | lldpd_alloc_hardware(struct lldpd *cfg, char *name) | |
43c02e7b | 148 | { |
6e75df87 | 149 | struct lldpd_hardware *hardware; |
43c02e7b | 150 | |
6e75df87 VB |
151 | if ((hardware = (struct lldpd_hardware *) |
152 | calloc(1, sizeof(struct lldpd_hardware))) == NULL) | |
153 | return NULL; | |
43c02e7b | 154 | |
6e75df87 VB |
155 | strlcpy(hardware->h_ifname, name, sizeof(hardware->h_ifname)); |
156 | hardware->h_lport.p_chassis = LOCAL_CHASSIS(cfg); | |
9df5ec3d | 157 | hardware->h_lport.p_chassis->c_refcount++; |
6e75df87 | 158 | TAILQ_INIT(&hardware->h_rports); |
43c02e7b | 159 | |
6e75df87 VB |
160 | #ifdef ENABLE_LLDPMED |
161 | if (LOCAL_CHASSIS(cfg)->c_med_cap_available) { | |
162 | hardware->h_lport.p_med_cap_enabled = LLDPMED_CAP_CAP; | |
163 | if (!cfg->g_noinventory) | |
164 | hardware->h_lport.p_med_cap_enabled |= LLDPMED_CAP_IV; | |
165 | } | |
166 | #endif | |
167 | #ifdef ENABLE_DOT1 | |
168 | TAILQ_INIT(&hardware->h_lport.p_vlans); | |
9757bfbc SK |
169 | TAILQ_INIT(&hardware->h_lport.p_ppvids); |
170 | TAILQ_INIT(&hardware->h_lport.p_pids); | |
6e75df87 VB |
171 | #endif |
172 | return hardware; | |
43c02e7b VB |
173 | } |
174 | ||
a1347cd8 | 175 | #ifdef ENABLE_DOT1 |
43c02e7b VB |
176 | void |
177 | lldpd_vlan_cleanup(struct lldpd_port *port) | |
178 | { | |
179 | struct lldpd_vlan *vlan, *vlan_next; | |
180 | for (vlan = TAILQ_FIRST(&port->p_vlans); | |
181 | vlan != NULL; | |
182 | vlan = vlan_next) { | |
183 | free(vlan->v_name); | |
184 | vlan_next = TAILQ_NEXT(vlan, v_entries); | |
185 | TAILQ_REMOVE(&port->p_vlans, vlan, v_entries); | |
186 | free(vlan); | |
187 | } | |
188 | } | |
9757bfbc SK |
189 | |
190 | void | |
191 | lldpd_ppvid_cleanup(struct lldpd_port *port) | |
192 | { | |
193 | struct lldpd_ppvid *ppvid, *ppvid_next; | |
194 | for (ppvid = TAILQ_FIRST(&port->p_ppvids); | |
195 | ppvid != NULL; | |
196 | ppvid = ppvid_next) { | |
197 | ppvid_next = TAILQ_NEXT(ppvid, p_entries); | |
198 | TAILQ_REMOVE(&port->p_ppvids, ppvid, p_entries); | |
199 | free(ppvid); | |
200 | } | |
201 | } | |
202 | ||
203 | void | |
204 | lldpd_pi_cleanup(struct lldpd_port *port) | |
205 | { | |
206 | struct lldpd_pi *pi, *pi_next; | |
207 | for (pi = TAILQ_FIRST(&port->p_pids); | |
208 | pi != NULL; | |
209 | pi = pi_next) { | |
210 | free(pi->p_pi); | |
211 | pi_next = TAILQ_NEXT(pi, p_entries); | |
212 | TAILQ_REMOVE(&port->p_pids, pi, p_entries); | |
213 | free(pi); | |
214 | } | |
215 | } | |
a1347cd8 | 216 | #endif |
43c02e7b | 217 | |
a0edeaf8 | 218 | /* If `all' is true, clear all information, including information that |
4e624dc2 | 219 | are not refreshed periodically. Port should be freed manually. */ |
43c02e7b | 220 | void |
9898ac07 | 221 | lldpd_port_cleanup(struct lldpd *cfg, struct lldpd_port *port, int all) |
43c02e7b | 222 | { |
740593ff VB |
223 | #ifdef ENABLE_LLDPMED |
224 | int i; | |
a0edeaf8 VB |
225 | if (all) |
226 | for (i=0; i < LLDPMED_LOCFORMAT_LAST; i++) | |
227 | free(port->p_med_location[i].data); | |
740593ff | 228 | #endif |
a1347cd8 | 229 | #ifdef ENABLE_DOT1 |
43c02e7b | 230 | lldpd_vlan_cleanup(port); |
9757bfbc SK |
231 | lldpd_ppvid_cleanup(port); |
232 | lldpd_pi_cleanup(port); | |
a1347cd8 | 233 | #endif |
43c02e7b VB |
234 | free(port->p_id); |
235 | free(port->p_descr); | |
77507b69 VB |
236 | if (all) { |
237 | free(port->p_lastframe); | |
9898ac07 | 238 | if (port->p_chassis) { /* chassis may not have been attributed, yet */ |
77507b69 | 239 | port->p_chassis->c_refcount--; |
9898ac07 V |
240 | port->p_chassis = NULL; |
241 | } | |
77507b69 | 242 | } |
43c02e7b VB |
243 | } |
244 | ||
245 | void | |
77507b69 | 246 | lldpd_chassis_cleanup(struct lldpd_chassis *chassis, int all) |
43c02e7b | 247 | { |
89840df0 VB |
248 | #ifdef ENABLE_LLDPMED |
249 | free(chassis->c_med_hw); | |
517d524b | 250 | free(chassis->c_med_sw); |
89840df0 VB |
251 | free(chassis->c_med_fw); |
252 | free(chassis->c_med_sn); | |
253 | free(chassis->c_med_manuf); | |
254 | free(chassis->c_med_model); | |
255 | free(chassis->c_med_asset); | |
256 | #endif | |
43c02e7b VB |
257 | free(chassis->c_id); |
258 | free(chassis->c_name); | |
259 | free(chassis->c_descr); | |
77507b69 VB |
260 | if (all) |
261 | free(chassis); | |
43c02e7b VB |
262 | } |
263 | ||
264 | void | |
77507b69 | 265 | lldpd_remote_cleanup(struct lldpd *cfg, struct lldpd_hardware *hardware, int all) |
43c02e7b | 266 | { |
77507b69 VB |
267 | struct lldpd_port *port, *port_next; |
268 | int del; | |
269 | for (port = TAILQ_FIRST(&hardware->h_rports); | |
270 | port != NULL; | |
271 | port = port_next) { | |
272 | port_next = TAILQ_NEXT(port, p_entries); | |
273 | del = all; | |
274 | if (!del && | |
275 | (time(NULL) - port->p_lastupdate > port->p_chassis->c_ttl)) { | |
276 | hardware->h_rx_ageout_cnt++; | |
277 | del = 1; | |
278 | } | |
279 | if (del) { | |
280 | TAILQ_REMOVE(&hardware->h_rports, port, p_entries); | |
9898ac07 | 281 | lldpd_port_cleanup(cfg, port, 1); |
4e624dc2 | 282 | free(port); |
77507b69 | 283 | } |
43c02e7b | 284 | } |
43c02e7b VB |
285 | } |
286 | ||
d9be8ea0 | 287 | void |
6e75df87 | 288 | lldpd_hardware_cleanup(struct lldpd *cfg, struct lldpd_hardware *hardware) |
d9be8ea0 | 289 | { |
6e75df87 | 290 | int i; |
9898ac07 | 291 | lldpd_port_cleanup(cfg, &hardware->h_lport, 1); |
6e75df87 VB |
292 | /* If we have a dedicated cleanup function, use it. Otherwise, |
293 | we just free the hardware-dependent data and close all FD | |
294 | in h_recvfds and h_sendfd. */ | |
295 | if (hardware->h_ops->cleanup) | |
296 | hardware->h_ops->cleanup(cfg, hardware); | |
297 | else { | |
298 | free(hardware->h_data); | |
bc598c23 | 299 | for (i=0; i < LLDPD_FD_SETSIZE; i++) |
6e75df87 VB |
300 | if (FD_ISSET(i, &hardware->h_recvfds)) |
301 | close(i); | |
302 | if (hardware->h_sendfd) close(hardware->h_sendfd); | |
303 | } | |
d9be8ea0 VB |
304 | free(hardware); |
305 | } | |
306 | ||
6e75df87 | 307 | static void |
43c02e7b VB |
308 | lldpd_cleanup(struct lldpd *cfg) |
309 | { | |
310 | struct lldpd_hardware *hardware, *hardware_next; | |
aadc9936 | 311 | struct lldpd_chassis *chassis, *chassis_next; |
43c02e7b VB |
312 | |
313 | for (hardware = TAILQ_FIRST(&cfg->g_hardware); hardware != NULL; | |
314 | hardware = hardware_next) { | |
315 | hardware_next = TAILQ_NEXT(hardware, h_entries); | |
6e75df87 | 316 | if (!hardware->h_flags) { |
43c02e7b | 317 | TAILQ_REMOVE(&cfg->g_hardware, hardware, h_entries); |
77507b69 | 318 | lldpd_remote_cleanup(cfg, hardware, 1); |
6e75df87 | 319 | lldpd_hardware_cleanup(cfg, hardware); |
77507b69 VB |
320 | } else |
321 | lldpd_remote_cleanup(cfg, hardware, 0); | |
43c02e7b | 322 | } |
aadc9936 VB |
323 | |
324 | for (chassis = TAILQ_FIRST(&cfg->g_chassis); chassis; | |
325 | chassis = chassis_next) { | |
326 | chassis_next = TAILQ_NEXT(chassis, c_entries); | |
327 | if (chassis->c_refcount == 0) { | |
328 | TAILQ_REMOVE(&cfg->g_chassis, chassis, c_entries); | |
329 | lldpd_chassis_cleanup(chassis, 1); | |
330 | } | |
331 | } | |
43c02e7b VB |
332 | } |
333 | ||
566c635d VB |
334 | /* Update chassis `ochassis' with values from `chassis'. */ |
335 | static void | |
336 | lldpd_update_chassis(struct lldpd_chassis *ochassis, | |
337 | const struct lldpd_chassis *chassis) { | |
338 | TAILQ_ENTRY(lldpd_chassis) entries; | |
339 | /* We want to keep refcount, index and list stuff from the current | |
340 | * chassis */ | |
341 | int refcount = ochassis->c_refcount; | |
342 | int index = ochassis->c_index; | |
343 | memcpy(&entries, &ochassis->c_entries, | |
344 | sizeof(entries)); | |
345 | /* Make the copy */ | |
346 | lldpd_chassis_cleanup(ochassis, 0); | |
347 | memcpy(ochassis, chassis, sizeof(struct lldpd_chassis)); | |
348 | /* Restore saved values */ | |
349 | ochassis->c_refcount = refcount; | |
350 | ochassis->c_index = index; | |
351 | memcpy(&ochassis->c_entries, &entries, sizeof(entries)); | |
352 | } | |
353 | ||
8888d191 | 354 | static int |
43c02e7b VB |
355 | lldpd_guess_type(struct lldpd *cfg, char *frame, int s) |
356 | { | |
357 | int i; | |
358 | if (s < ETH_ALEN) | |
359 | return -1; | |
360 | for (i=0; cfg->g_protocols[i].mode != 0; i++) { | |
361 | if (!cfg->g_protocols[i].enabled) | |
362 | continue; | |
363 | if (cfg->g_protocols[i].guess == NULL) { | |
364 | if (memcmp(frame, cfg->g_protocols[i].mac, ETH_ALEN) == 0) | |
365 | return cfg->g_protocols[i].mode; | |
366 | } else { | |
367 | if (cfg->g_protocols[i].guess(frame, s)) | |
368 | return cfg->g_protocols[i].mode; | |
369 | } | |
370 | } | |
371 | return -1; | |
372 | } | |
373 | ||
8888d191 | 374 | static void |
43c02e7b | 375 | lldpd_decode(struct lldpd *cfg, char *frame, int s, |
0bc32943 | 376 | struct lldpd_hardware *hardware) |
43c02e7b | 377 | { |
77507b69 VB |
378 | int i, result; |
379 | struct lldpd_chassis *chassis, *ochassis = NULL; | |
380 | struct lldpd_port *port, *oport = NULL; | |
43c02e7b VB |
381 | int guess = LLDPD_MODE_LLDP; |
382 | ||
49697208 VB |
383 | if (s < sizeof(struct ethhdr) + 4) |
384 | /* Too short, just discard it */ | |
50a89ca7 | 385 | return; |
49697208 VB |
386 | /* Decapsulate VLAN frames */ |
387 | if (((struct ethhdr*)frame)->h_proto == htons(ETHERTYPE_VLAN)) { | |
388 | /* VLAN decapsulation means to shift 4 bytes left the frame from | |
389 | * offset 2*ETH_ALEN */ | |
390 | memmove(frame + 2*ETH_ALEN, frame + 2*ETH_ALEN + 4, s - 2*ETH_ALEN); | |
391 | s -= 4; | |
392 | } | |
50a89ca7 | 393 | |
77507b69 VB |
394 | TAILQ_FOREACH(oport, &hardware->h_rports, p_entries) { |
395 | if ((oport->p_lastframe != NULL) && | |
396 | (oport->p_lastframe->size == s) && | |
397 | (memcmp(oport->p_lastframe->frame, frame, s) == 0)) { | |
398 | /* Already received the same frame */ | |
399 | oport->p_lastupdate = time(NULL); | |
400 | return; | |
401 | } | |
43c02e7b VB |
402 | } |
403 | ||
f2dcb180 VB |
404 | guess = lldpd_guess_type(cfg, frame, s); |
405 | for (i=0; cfg->g_protocols[i].mode != 0; i++) { | |
406 | if (!cfg->g_protocols[i].enabled) | |
407 | continue; | |
408 | if (cfg->g_protocols[i].mode == guess) { | |
409 | if ((result = cfg->g_protocols[i].decode(cfg, frame, | |
410 | s, hardware, &chassis, &port)) == -1) | |
411 | return; | |
77507b69 VB |
412 | chassis->c_protocol = port->p_protocol = |
413 | cfg->g_protocols[i].mode; | |
f2dcb180 | 414 | break; |
43c02e7b | 415 | } |
f2dcb180 VB |
416 | } |
417 | if (cfg->g_protocols[i].mode == 0) { | |
418 | LLOG_INFO("unable to guess frame type"); | |
43c02e7b | 419 | return; |
f2dcb180 | 420 | } |
43c02e7b | 421 | |
77507b69 VB |
422 | /* Do we already have the same MSAP somewhere? */ |
423 | TAILQ_FOREACH(oport, &hardware->h_rports, p_entries) { | |
424 | if ((port->p_protocol == oport->p_protocol) && | |
425 | (port->p_id_subtype == oport->p_id_subtype) && | |
426 | (port->p_id_len == oport->p_id_len) && | |
427 | (memcmp(port->p_id, oport->p_id, port->p_id_len) == 0) && | |
428 | (chassis->c_id_subtype == oport->p_chassis->c_id_subtype) && | |
429 | (chassis->c_id_len == oport->p_chassis->c_id_len) && | |
430 | (memcmp(chassis->c_id, oport->p_chassis->c_id, | |
431 | chassis->c_id_len) == 0)) { | |
432 | ochassis = oport->p_chassis; | |
433 | break; | |
434 | } | |
43c02e7b | 435 | } |
77507b69 VB |
436 | /* No, but do we already know the system? */ |
437 | if (!oport) { | |
438 | TAILQ_FOREACH(ochassis, &cfg->g_chassis, c_entries) { | |
439 | if ((chassis->c_protocol == ochassis->c_protocol) && | |
440 | (chassis->c_id_subtype == ochassis->c_id_subtype) && | |
441 | (chassis->c_id_len == ochassis->c_id_len) && | |
442 | (memcmp(chassis->c_id, ochassis->c_id, | |
443 | chassis->c_id_len) == 0)) | |
444 | break; | |
43c02e7b | 445 | } |
43c02e7b | 446 | } |
43c02e7b | 447 | |
77507b69 VB |
448 | if (oport) { |
449 | /* The port is known, remove it before adding it back */ | |
450 | TAILQ_REMOVE(&hardware->h_rports, oport, p_entries); | |
9898ac07 | 451 | lldpd_port_cleanup(cfg, oport, 1); |
4e624dc2 | 452 | free(oport); |
77507b69 VB |
453 | } |
454 | if (ochassis) { | |
16f910e1 | 455 | lldpd_update_chassis(ochassis, chassis); |
77507b69 VB |
456 | free(chassis); |
457 | chassis = ochassis; | |
458 | } else { | |
459 | /* Chassis not known, add it */ | |
460 | chassis->c_index = ++cfg->g_lastrid; | |
77507b69 VB |
461 | chassis->c_refcount = 0; |
462 | TAILQ_INSERT_TAIL(&cfg->g_chassis, chassis, c_entries); | |
f4c43902 VB |
463 | i = 0; TAILQ_FOREACH(ochassis, &cfg->g_chassis, c_entries) i++; |
464 | LLOG_DEBUG("Currently, we know %d different systems", i); | |
77507b69 VB |
465 | } |
466 | /* Add port */ | |
467 | port->p_lastchange = port->p_lastupdate = time(NULL); | |
468 | if ((port->p_lastframe = (struct lldpd_frame *)malloc(s + | |
469 | sizeof(int))) != NULL) { | |
470 | port->p_lastframe->size = s; | |
471 | memcpy(port->p_lastframe->frame, frame, s); | |
472 | } | |
473 | TAILQ_INSERT_TAIL(&hardware->h_rports, port, p_entries); | |
474 | port->p_chassis = chassis; | |
475 | port->p_chassis->c_refcount++; | |
9df5ec3d VB |
476 | /* Several cases are possible : |
477 | 1. chassis is new, its refcount was 0. It is now attached | |
478 | to this port, its refcount is 1. | |
479 | 2. chassis already exists and was attached to another | |
480 | port, we increase its refcount accordingly. | |
481 | 3. chassis already exists and was attached to the same | |
482 | port, its refcount was decreased with | |
483 | lldpd_port_cleanup() and is now increased again. | |
484 | ||
485 | In all cases, if the port already existed, it has been | |
486 | freed with lldpd_port_cleanup() and therefore, the refcount | |
487 | of the chassis that was attached to it is decreased. | |
488 | */ | |
42b39485 VB |
489 | i = 0; TAILQ_FOREACH(oport, &hardware->h_rports, p_entries) |
490 | i++; | |
491 | LLOG_DEBUG("Currently, %s knows %d neighbors", | |
f4c43902 | 492 | hardware->h_ifname, i); |
43c02e7b VB |
493 | return; |
494 | } | |
495 | ||
c036b15d VB |
496 | /* Get the output of lsb_release -s -d. This is a slow function. It should be |
497 | called once. It return NULL if any problem happens. Otherwise, this is a | |
498 | statically allocated buffer. The result includes the trailing \n */ | |
499 | static char * | |
500 | lldpd_get_lsb_release() { | |
501 | static char release[1024]; | |
502 | char *const command[] = { "lsb_release", "-s", "-d", NULL }; | |
503 | int pid, status, devnull, count; | |
504 | int pipefd[2]; | |
505 | ||
506 | if (pipe(pipefd)) { | |
507 | LLOG_WARN("unable to get a pair of pipes"); | |
508 | return NULL; | |
509 | } | |
510 | ||
511 | if ((pid = fork()) < 0) { | |
512 | LLOG_WARN("unable to fork"); | |
513 | return NULL; | |
514 | } | |
515 | switch (pid) { | |
516 | case 0: | |
517 | /* Child, exec lsb_release */ | |
518 | close(pipefd[0]); | |
519 | if ((devnull = open("/dev/null", O_RDWR, 0)) != -1) { | |
520 | dup2(devnull, STDIN_FILENO); | |
521 | dup2(devnull, STDERR_FILENO); | |
522 | dup2(pipefd[1], STDOUT_FILENO); | |
523 | if (devnull > 2) close(devnull); | |
524 | if (pipefd[1] > 2) close(pipefd[1]); | |
525 | execvp("lsb_release", command); | |
526 | } | |
527 | exit(127); | |
528 | break; | |
529 | default: | |
530 | /* Father, read the output from the children */ | |
531 | close(pipefd[1]); | |
532 | count = 0; | |
533 | do { | |
534 | status = read(pipefd[0], release+count, sizeof(release)-count); | |
535 | if ((status == -1) && (errno == EINTR)) continue; | |
536 | if (status > 0) | |
537 | count += status; | |
538 | } while (count < sizeof(release) && (status > 0)); | |
539 | if (status < 0) { | |
540 | LLOG_WARN("unable to read from lsb_release"); | |
541 | close(pipefd[0]); | |
542 | waitpid(pid, &status, 0); | |
543 | return NULL; | |
544 | } | |
545 | close(pipefd[0]); | |
546 | if (count >= sizeof(release)) { | |
547 | LLOG_INFO("output of lsb_release is too large"); | |
548 | waitpid(pid, &status, 0); | |
549 | return NULL; | |
550 | } | |
551 | status = -1; | |
552 | if (waitpid(pid, &status, 0) != pid) | |
553 | return NULL; | |
554 | if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) { | |
555 | LLOG_INFO("lsb_release information not available"); | |
556 | return NULL; | |
557 | } | |
558 | if (!count) { | |
559 | LLOG_INFO("lsb_release returned an empty string"); | |
560 | return NULL; | |
561 | } | |
562 | release[count] = '\0'; | |
563 | return release; | |
564 | } | |
565 | /* Should not be here */ | |
566 | return NULL; | |
567 | } | |
568 | ||
ae87586a MT |
569 | /* Same like lldpd_get_lsb_release but reads /etc/os-release for PRETTY_NAME=. */ |
570 | static char * | |
571 | lldpd_get_os_release() { | |
572 | static char release[1024]; | |
9757bfbc SK |
573 | char line[1024]; |
574 | char *key, *val; | |
575 | char *ptr1 = release; | |
576 | char *ptr2 = release; | |
ae87586a MT |
577 | |
578 | FILE *fp = fopen("/etc/os-release", "r"); | |
579 | if (!fp) { | |
e02afca4 | 580 | LLOG_WARN("could not open /etc/os-release"); |
ae87586a MT |
581 | return NULL; |
582 | } | |
583 | ||
ae87586a MT |
584 | while ((fgets(line, 1024, fp) != NULL)) { |
585 | key = strtok(line, "="); | |
586 | val = strtok(NULL, "="); | |
587 | ||
588 | if (strncmp(key, "PRETTY_NAME", 1024) == 0) { | |
589 | strncpy(release, val, 1024); | |
590 | break; | |
591 | } | |
592 | } | |
593 | fclose(fp); | |
594 | ||
595 | /* Remove trailing newline and all " in the string. */ | |
ae87586a MT |
596 | while (*ptr1 != 0) { |
597 | if ((*ptr1 == '"') || (*ptr1 == '\n')) { | |
598 | ++ptr1; | |
599 | } else { | |
600 | *ptr2++ = *ptr1++; | |
601 | } | |
602 | } | |
603 | *ptr2 = 0; | |
604 | ||
605 | return release; | |
606 | } | |
607 | ||
77d7090e VB |
608 | int |
609 | lldpd_callback_add(struct lldpd *cfg, int fd, void(*fn)(CALLBACK_SIG), void *data) | |
610 | { | |
611 | struct lldpd_callback *callback; | |
612 | if ((callback = (struct lldpd_callback *) | |
613 | malloc(sizeof(struct lldpd_callback))) == NULL) | |
614 | return -1; | |
615 | callback->fd = fd; | |
616 | callback->function = fn; | |
617 | callback->data = data; | |
618 | TAILQ_INSERT_TAIL(&cfg->g_callbacks, callback, next); | |
619 | return 0; | |
620 | } | |
621 | ||
622 | void | |
623 | lldpd_callback_del(struct lldpd *cfg, int fd, void(*fn)(CALLBACK_SIG)) | |
624 | { | |
625 | struct lldpd_callback *callback, *callback_next; | |
626 | for (callback = TAILQ_FIRST(&cfg->g_callbacks); | |
627 | callback; | |
628 | callback = callback_next) { | |
629 | callback_next = TAILQ_NEXT(callback, next); | |
630 | if ((callback->fd == fd) && | |
631 | (callback->function = fn)) { | |
632 | free(callback->data); | |
633 | TAILQ_REMOVE(&cfg->g_callbacks, callback, next); | |
634 | free(callback); | |
635 | } | |
636 | } | |
637 | } | |
16f910e1 | 638 | |
8482abe9 VB |
639 | static void |
640 | lldpd_hide_ports(struct lldpd *cfg, struct lldpd_hardware *hardware, int mask) { | |
42b39485 VB |
641 | struct lldpd_port *port; |
642 | int protocols[LLDPD_MODE_MAX+1]; | |
8482abe9 VB |
643 | char buffer[256]; |
644 | int i, j, k, found; | |
42b39485 VB |
645 | unsigned int min; |
646 | ||
8482abe9 VB |
647 | /* Compute the number of occurrences of each protocol */ |
648 | for (i = 0; i <= LLDPD_MODE_MAX; i++) protocols[i] = 0; | |
649 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) | |
650 | protocols[port->p_protocol]++; | |
651 | ||
652 | /* Turn the protocols[] array into an array of | |
653 | enabled/disabled protocols. 1 means enabled, 0 | |
654 | means disabled. */ | |
655 | min = (unsigned int)-1; | |
656 | for (i = 0; i <= LLDPD_MODE_MAX; i++) | |
657 | if (protocols[i] && (protocols[i] < min)) | |
658 | min = protocols[i]; | |
659 | found = 0; | |
660 | for (i = 0; i <= LLDPD_MODE_MAX; i++) | |
661 | if ((protocols[i] == min) && !found) { | |
662 | /* If we need a tie breaker, we take | |
663 | the first protocol only */ | |
664 | if (cfg->g_smart & mask & | |
665 | (SMART_OUTGOING_ONE_PROTO | SMART_INCOMING_ONE_PROTO)) | |
666 | found = 1; | |
667 | protocols[i] = 1; | |
668 | } else protocols[i] = 0; | |
669 | ||
670 | /* We set the p_hidden flag to 1 if the protocol is disabled */ | |
671 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) { | |
672 | if (mask == SMART_OUTGOING) | |
673 | port->p_hidden_out = protocols[port->p_protocol]?0:1; | |
674 | else | |
675 | port->p_hidden_in = protocols[port->p_protocol]?0:1; | |
676 | } | |
677 | ||
678 | /* If we want only one neighbor, we take the first one */ | |
679 | if (cfg->g_smart & mask & | |
680 | (SMART_OUTGOING_ONE_NEIGH | SMART_INCOMING_ONE_NEIGH)) { | |
42b39485 | 681 | found = 0; |
8482abe9 VB |
682 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) { |
683 | if (mask == SMART_OUTGOING) { | |
684 | if (found) port->p_hidden_out = 1; | |
685 | if (!port->p_hidden_out) | |
686 | found = 1; | |
687 | } | |
688 | if (mask == SMART_INCOMING) { | |
689 | if (found) port->p_hidden_in = 1; | |
690 | if (!port->p_hidden_in) | |
42b39485 | 691 | found = 1; |
42b39485 VB |
692 | } |
693 | } | |
8482abe9 | 694 | } |
42b39485 | 695 | |
8482abe9 VB |
696 | /* Print a debug message summarizing the operation */ |
697 | for (i = 0; i <= LLDPD_MODE_MAX; i++) protocols[i] = 0; | |
698 | k = j = 0; | |
699 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) { | |
700 | if (!(((mask == SMART_OUTGOING) && port->p_hidden_out) || | |
701 | ((mask == SMART_INCOMING) && port->p_hidden_in))) { | |
702 | k++; | |
703 | protocols[port->p_protocol] = 1; | |
42b39485 | 704 | } |
8482abe9 VB |
705 | j++; |
706 | } | |
707 | buffer[0] = '\0'; | |
708 | for (i=0; cfg->g_protocols[i].mode != 0; i++) { | |
709 | if (cfg->g_protocols[i].enabled && protocols[cfg->g_protocols[i].mode]) { | |
710 | if (strlen(buffer) + | |
711 | strlen(cfg->g_protocols[i].name) + 3 > sizeof(buffer)) { | |
712 | /* Unlikely, our buffer is too small */ | |
713 | memcpy(buffer + sizeof(buffer) - 4, "...", 4); | |
714 | break; | |
42b39485 | 715 | } |
8482abe9 VB |
716 | if (buffer[0]) |
717 | strcat(buffer, ", "); | |
718 | strcat(buffer, cfg->g_protocols[i].name); | |
42b39485 VB |
719 | } |
720 | } | |
8482abe9 VB |
721 | LLOG_DEBUG("[%s] %s: %d visible neigh / %d. Protocols: %s.", |
722 | (mask == SMART_OUTGOING)?"out filter":"in filter", | |
723 | hardware->h_ifname, k, j, buffer[0]?buffer:"(none)"); | |
42b39485 VB |
724 | } |
725 | ||
566c635d VB |
726 | /* Hide unwanted ports depending on smart mode set by the user */ |
727 | static void | |
728 | lldpd_hide_all(struct lldpd *cfg) | |
729 | { | |
730 | struct lldpd_hardware *hardware; | |
731 | ||
732 | if (!cfg->g_smart) | |
733 | return; | |
734 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { | |
735 | if (cfg->g_smart & SMART_INCOMING_FILTER) | |
736 | lldpd_hide_ports(cfg, hardware, SMART_INCOMING); | |
737 | if (cfg->g_smart & SMART_OUTGOING_FILTER) | |
738 | lldpd_hide_ports(cfg, hardware, SMART_OUTGOING); | |
739 | } | |
740 | } | |
741 | ||
8888d191 | 742 | static void |
43c02e7b VB |
743 | lldpd_recv_all(struct lldpd *cfg) |
744 | { | |
745 | struct lldpd_hardware *hardware; | |
77d7090e | 746 | struct lldpd_callback *callback, *callback_next; |
43c02e7b VB |
747 | fd_set rfds; |
748 | struct timeval tv; | |
43c02e7b | 749 | #ifdef USE_SNMP |
630b4134 VB |
750 | struct timeval snmptv; |
751 | int snmpblock = 0; | |
43c02e7b | 752 | #endif |
0bc32943 | 753 | int rc, nfds, n; |
43c02e7b VB |
754 | char *buffer; |
755 | ||
756 | do { | |
757 | tv.tv_sec = cfg->g_delay - (time(NULL) - cfg->g_lastsent); | |
758 | if (tv.tv_sec < 0) | |
c520cb14 VB |
759 | /* We did not send packets in a long time, |
760 | just give up receive for now. */ | |
761 | break; | |
43c02e7b VB |
762 | if (tv.tv_sec >= cfg->g_delay) |
763 | tv.tv_sec = cfg->g_delay; | |
764 | tv.tv_usec = 0; | |
765 | ||
766 | FD_ZERO(&rfds); | |
767 | nfds = -1; | |
768 | ||
769 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { | |
770 | /* Ignore if interface is down */ | |
6e75df87 | 771 | if ((hardware->h_flags & IFF_RUNNING) == 0) |
43c02e7b | 772 | continue; |
6e75df87 VB |
773 | /* This is quite expensive but we don't rely on internal |
774 | * structure of fd_set. */ | |
bc598c23 | 775 | for (n = 0; n < LLDPD_FD_SETSIZE; n++) |
6e75df87 VB |
776 | if (FD_ISSET(n, &hardware->h_recvfds)) { |
777 | FD_SET(n, &rfds); | |
778 | if (nfds < n) | |
779 | nfds = n; | |
780 | } | |
43c02e7b | 781 | } |
77d7090e VB |
782 | TAILQ_FOREACH(callback, &cfg->g_callbacks, next) { |
783 | FD_SET(callback->fd, &rfds); | |
784 | if (nfds < callback->fd) | |
785 | nfds = callback->fd; | |
43c02e7b | 786 | } |
43c02e7b VB |
787 | |
788 | #ifdef USE_SNMP | |
630b4134 VB |
789 | if (cfg->g_snmp) { |
790 | snmpblock = 0; | |
791 | memcpy(&snmptv, &tv, sizeof(struct timeval)); | |
792 | snmp_select_info(&nfds, &rfds, &snmptv, &snmpblock); | |
793 | if (snmpblock == 0) | |
794 | memcpy(&tv, &snmptv, sizeof(struct timeval)); | |
795 | } | |
43c02e7b VB |
796 | #endif /* USE_SNMP */ |
797 | if (nfds == -1) { | |
798 | sleep(cfg->g_delay); | |
799 | return; | |
800 | } | |
801 | ||
802 | rc = select(nfds + 1, &rfds, NULL, NULL, &tv); | |
803 | if (rc == -1) { | |
804 | if (errno == EINTR) | |
805 | continue; | |
806 | LLOG_WARN("failure on select"); | |
807 | break; | |
808 | } | |
809 | #ifdef USE_SNMP | |
810 | if (cfg->g_snmp) { | |
811 | if (rc > 0) | |
812 | snmp_read(&rfds); | |
813 | else if (rc == 0) | |
814 | snmp_timeout(); | |
815 | } | |
816 | #endif /* USE_SNMP */ | |
817 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { | |
bc598c23 | 818 | for (n = 0; n < LLDPD_FD_SETSIZE; n++) |
6e75df87 VB |
819 | if ((FD_ISSET(n, &hardware->h_recvfds)) && |
820 | (FD_ISSET(n, &rfds))) break; | |
bc598c23 | 821 | if (n == LLDPD_FD_SETSIZE) continue; |
6e75df87 VB |
822 | if ((buffer = (char *)malloc( |
823 | hardware->h_mtu)) == NULL) { | |
824 | LLOG_WARN("failed to alloc reception buffer"); | |
825 | continue; | |
826 | } | |
827 | if ((n = hardware->h_ops->recv(cfg, hardware, | |
828 | n, buffer, hardware->h_mtu)) == -1) { | |
43c02e7b | 829 | free(buffer); |
6e75df87 | 830 | continue; |
43c02e7b | 831 | } |
6e75df87 VB |
832 | hardware->h_rx_cnt++; |
833 | lldpd_decode(cfg, buffer, n, hardware); | |
6b41bbd3 | 834 | lldpd_hide_all(cfg); /* Immediatly hide */ |
6e75df87 VB |
835 | free(buffer); |
836 | break; | |
43c02e7b | 837 | } |
77d7090e VB |
838 | for (callback = TAILQ_FIRST(&cfg->g_callbacks); |
839 | callback; | |
840 | callback = callback_next) { | |
841 | /* Callback function can use TAILQ_REMOVE */ | |
842 | callback_next = TAILQ_NEXT(callback, next); | |
843 | if (FD_ISSET(callback->fd, &rfds)) | |
844 | callback->function(cfg, callback); | |
43c02e7b VB |
845 | } |
846 | ||
847 | #ifdef USE_SNMP | |
848 | if (cfg->g_snmp) { | |
849 | run_alarms(); | |
850 | netsnmp_check_outstanding_agent_requests(); | |
851 | } | |
852 | #endif /* USE_SNMP */ | |
853 | } while ((rc != 0) || (time(NULL) - cfg->g_lastsent < cfg->g_delay)); | |
854 | } | |
855 | ||
8888d191 | 856 | static void |
43c02e7b VB |
857 | lldpd_send_all(struct lldpd *cfg) |
858 | { | |
859 | struct lldpd_hardware *hardware; | |
77507b69 | 860 | struct lldpd_port *port; |
0d86e62f | 861 | int i, sent; |
f7db0dd8 | 862 | |
43c02e7b | 863 | cfg->g_lastsent = time(NULL); |
c520cb14 | 864 | if (cfg->g_receiveonly) return; |
43c02e7b VB |
865 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) { |
866 | /* Ignore if interface is down */ | |
6e75df87 | 867 | if ((hardware->h_flags & IFF_RUNNING) == 0) |
43c02e7b VB |
868 | continue; |
869 | ||
0d86e62f | 870 | sent = 0; |
43c02e7b VB |
871 | for (i=0; cfg->g_protocols[i].mode != 0; i++) { |
872 | if (!cfg->g_protocols[i].enabled) | |
873 | continue; | |
77507b69 | 874 | /* We send only if we have at least one remote system |
0c877af0 VB |
875 | * speaking this protocol or if the protocol is forced */ |
876 | if (cfg->g_protocols[i].enabled > 1) { | |
877 | cfg->g_protocols[i].send(cfg, hardware); | |
878 | sent++; | |
879 | continue; | |
880 | } | |
77507b69 | 881 | TAILQ_FOREACH(port, &hardware->h_rports, p_entries) { |
42b39485 VB |
882 | /* If this remote port is disabled, we don't |
883 | * consider it */ | |
4d1a5b39 | 884 | if (port->p_hidden_out) |
42b39485 | 885 | continue; |
77507b69 VB |
886 | if (port->p_protocol == |
887 | cfg->g_protocols[i].mode) { | |
888 | cfg->g_protocols[i].send(cfg, | |
889 | hardware); | |
0c877af0 | 890 | sent++; |
77507b69 VB |
891 | break; |
892 | } | |
893 | } | |
43c02e7b | 894 | } |
77507b69 VB |
895 | |
896 | if (!sent) | |
897 | /* Nothing was sent for this port, let's speak LLDP */ | |
898 | cfg->g_protocols[0].send(cfg, | |
899 | hardware); | |
43c02e7b VB |
900 | } |
901 | } | |
902 | ||
89840df0 | 903 | #ifdef ENABLE_LLDPMED |
8888d191 | 904 | static void |
89840df0 VB |
905 | lldpd_med(struct lldpd_chassis *chassis) |
906 | { | |
0265b1e5 | 907 | #if __i386__ || __amd64__ |
55606d4b VB |
908 | static short int once = 0; |
909 | if (!once) { | |
910 | chassis->c_med_hw = dmi_hw(); | |
911 | chassis->c_med_fw = dmi_fw(); | |
912 | chassis->c_med_sn = dmi_sn(); | |
913 | chassis->c_med_manuf = dmi_manuf(); | |
914 | chassis->c_med_model = dmi_model(); | |
915 | chassis->c_med_asset = dmi_asset(); | |
916 | once = 1; | |
917 | } | |
0265b1e5 | 918 | #endif |
89840df0 VB |
919 | } |
920 | #endif | |
921 | ||
8888d191 | 922 | static void |
6e75df87 | 923 | lldpd_update_localchassis(struct lldpd *cfg) |
43c02e7b | 924 | { |
6e75df87 VB |
925 | struct utsname un; |
926 | char *hp; | |
43c02e7b VB |
927 | int f; |
928 | char status; | |
43c02e7b VB |
929 | |
930 | /* Set system name and description */ | |
6e75df87 | 931 | if (uname(&un) != 0) |
43c02e7b | 932 | fatal("failed to get system information"); |
b5562b23 | 933 | if ((hp = priv_gethostbyname()) == NULL) |
43c02e7b | 934 | fatal("failed to get system name"); |
77507b69 VB |
935 | free(LOCAL_CHASSIS(cfg)->c_name); |
936 | free(LOCAL_CHASSIS(cfg)->c_descr); | |
937 | if ((LOCAL_CHASSIS(cfg)->c_name = strdup(hp)) == NULL) | |
249644a4 | 938 | fatal(NULL); |
40ce835b ST |
939 | if (cfg->g_descr_override) { |
940 | if (asprintf(&LOCAL_CHASSIS(cfg)->c_descr, "%s", | |
941 | cfg->g_descr_override) == -1) | |
de1b1b3a | 942 | fatal("failed to set full system description"); |
40ce835b ST |
943 | } else { |
944 | if (cfg->g_advertise_version) { | |
a9db9b44 | 945 | if (asprintf(&LOCAL_CHASSIS(cfg)->c_descr, "%s %s %s %s %s", |
c036b15d | 946 | cfg->g_lsb_release?cfg->g_lsb_release:"", |
a9db9b44 | 947 | un.sysname, un.release, un.version, un.machine) |
40ce835b ST |
948 | == -1) |
949 | fatal("failed to set full system description"); | |
950 | } else { | |
951 | if (asprintf(&LOCAL_CHASSIS(cfg)->c_descr, "%s", | |
c036b15d | 952 | cfg->g_lsb_release?cfg->g_lsb_release:un.sysname) == -1) |
40ce835b ST |
953 | fatal("failed to set minimal system description"); |
954 | } | |
955 | } | |
43c02e7b VB |
956 | |
957 | /* Check forwarding */ | |
b5562b23 | 958 | if ((f = priv_open("/proc/sys/net/ipv4/ip_forward")) >= 0) { |
e5c5ae41 VB |
959 | if ((read(f, &status, 1) == 1) && (status == '1')) |
960 | LOCAL_CHASSIS(cfg)->c_cap_enabled |= LLDP_CAP_ROUTER; | |
961 | else | |
962 | LOCAL_CHASSIS(cfg)->c_cap_enabled &= ~LLDP_CAP_ROUTER; | |
43c02e7b VB |
963 | close(f); |
964 | } | |
89840df0 | 965 | #ifdef ENABLE_LLDPMED |
77507b69 VB |
966 | if (LOCAL_CHASSIS(cfg)->c_cap_available & LLDP_CAP_TELEPHONE) |
967 | LOCAL_CHASSIS(cfg)->c_cap_enabled |= LLDP_CAP_TELEPHONE; | |
968 | lldpd_med(LOCAL_CHASSIS(cfg)); | |
969 | free(LOCAL_CHASSIS(cfg)->c_med_sw); | |
de1b1b3a VB |
970 | if (cfg->g_advertise_version) |
971 | LOCAL_CHASSIS(cfg)->c_med_sw = strdup(un.release); | |
972 | else | |
973 | LOCAL_CHASSIS(cfg)->c_med_sw = strdup("Unknown"); | |
89840df0 | 974 | #endif |
43c02e7b | 975 | |
b4ac8083 VB |
976 | /* Set chassis ID if needed. This is only done if chassis ID |
977 | has not been set previously (with the MAC address of an | |
978 | interface for example) | |
979 | */ | |
980 | if (LOCAL_CHASSIS(cfg)->c_id == NULL) { | |
981 | if (!(LOCAL_CHASSIS(cfg)->c_id = strdup(LOCAL_CHASSIS(cfg)->c_name))) | |
6e75df87 | 982 | fatal(NULL); |
b4ac8083 VB |
983 | LOCAL_CHASSIS(cfg)->c_id_len = strlen(LOCAL_CHASSIS(cfg)->c_name); |
984 | LOCAL_CHASSIS(cfg)->c_id_subtype = LLDP_CHASSISID_SUBTYPE_LOCAL; | |
6e75df87 VB |
985 | } |
986 | } | |
987 | ||
988 | static void | |
989 | lldpd_update_localports(struct lldpd *cfg) | |
990 | { | |
991 | struct ifaddrs *ifap; | |
992 | struct lldpd_hardware *hardware; | |
993 | lldpd_ifhandlers ifhs[] = { | |
ba85f9f4 | 994 | lldpd_ifh_whitelist, /* Is the interface whitelisted? */ |
849954d7 | 995 | lldpd_ifh_bond, /* Handle bond */ |
6e75df87 | 996 | lldpd_ifh_eth, /* Handle classic ethernet interfaces */ |
5994b27d | 997 | #ifdef ENABLE_DOT1 |
6e75df87 | 998 | lldpd_ifh_vlan, /* Handle VLAN */ |
5994b27d | 999 | #endif |
6e75df87 | 1000 | lldpd_ifh_mgmt, /* Handle management address (if not already handled) */ |
b4ac8083 | 1001 | lldpd_ifh_chassis, /* Handle chassis ID (if not already handled) */ |
6e75df87 VB |
1002 | NULL |
1003 | }; | |
1004 | lldpd_ifhandlers *ifh; | |
1005 | ||
1006 | /* h_flags is set to 0 for each port. If the port is updated, h_flags | |
1007 | * will be set to a non-zero value. This will allow us to clean up any | |
1008 | * non up-to-date port */ | |
43c02e7b VB |
1009 | TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) |
1010 | hardware->h_flags = 0; | |
1011 | ||
77507b69 | 1012 | LOCAL_CHASSIS(cfg)->c_mgmt.s_addr = INADDR_ANY; |
6e75df87 VB |
1013 | if (getifaddrs(&ifap) != 0) |
1014 | fatal("lldpd_update_localports: failed to get interface list"); | |
1015 | ||
1016 | /* We will run the list of interfaces through a list of interface | |
1017 | * handlers. Each handler will create or update some hardware port (and | |
1018 | * will set h_flags to a non zero value. The handler can use the list of | |
1019 | * interfaces but this is not mandatory. If the interface handler | |
1020 | * handles an interface from the list, it should set ifa_flags to 0 to | |
1021 | * let know the other handlers that it took care of this interface. This | |
1022 | * means that more specific handlers should be before less specific | |
1023 | * ones. */ | |
1024 | for (ifh = ifhs; *ifh != NULL; ifh++) | |
1025 | (*ifh)(cfg, ifap); | |
43c02e7b | 1026 | freeifaddrs(ifap); |
6e75df87 | 1027 | } |
43c02e7b | 1028 | |
6e75df87 VB |
1029 | static void |
1030 | lldpd_loop(struct lldpd *cfg) | |
1031 | { | |
1032 | /* Main loop. | |
1033 | ||
1034 | 1. Update local ports information | |
1035 | 2. Clean unwanted (removed) local ports | |
1036 | 3. Update local chassis information | |
1037 | 4. Send packets | |
1038 | 5. Receive packets | |
42b39485 | 1039 | 6. Update smart mode |
6e75df87 | 1040 | */ |
849954d7 | 1041 | LOCAL_CHASSIS(cfg)->c_cap_enabled = 0; |
6e75df87 | 1042 | lldpd_update_localports(cfg); |
43c02e7b | 1043 | lldpd_cleanup(cfg); |
6e75df87 | 1044 | lldpd_update_localchassis(cfg); |
c520cb14 | 1045 | lldpd_send_all(cfg); |
43c02e7b VB |
1046 | lldpd_recv_all(cfg); |
1047 | } | |
1048 | ||
8888d191 | 1049 | static void |
43c02e7b VB |
1050 | lldpd_shutdown(int sig) |
1051 | { | |
1052 | LLOG_INFO("signal received, exiting"); | |
1053 | exit(0); | |
1054 | } | |
1055 | ||
1056 | /* For signal handling */ | |
8888d191 | 1057 | static struct lldpd *gcfg = NULL; |
43c02e7b | 1058 | |
8888d191 | 1059 | static void |
43c02e7b VB |
1060 | lldpd_exit() |
1061 | { | |
6e75df87 | 1062 | struct lldpd_hardware *hardware, *hardware_next; |
b5562b23 VB |
1063 | close(gcfg->g_ctl); |
1064 | priv_ctl_cleanup(); | |
6e75df87 VB |
1065 | for (hardware = TAILQ_FIRST(&gcfg->g_hardware); hardware != NULL; |
1066 | hardware = hardware_next) { | |
1067 | hardware_next = TAILQ_NEXT(hardware, h_entries); | |
1068 | lldpd_hardware_cleanup(gcfg, hardware); | |
43c02e7b VB |
1069 | } |
1070 | #ifdef USE_SNMP | |
1071 | if (gcfg->g_snmp) | |
1072 | agent_shutdown(); | |
1073 | #endif /* USE_SNMP */ | |
1074 | } | |
1075 | ||
8482abe9 VB |
1076 | struct intint { int a; int b; }; |
1077 | static const struct intint filters[] = { | |
1078 | { 0, 0 }, | |
1079 | { 1, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | | |
1080 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
1081 | { 2, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO }, | |
1082 | { 3, SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
1083 | { 4, SMART_INCOMING_FILTER | SMART_OUTGOING_FILTER }, | |
1084 | { 5, SMART_INCOMING_FILTER }, | |
1085 | { 6, SMART_OUTGOING_FILTER }, | |
1086 | { 7, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | SMART_INCOMING_ONE_NEIGH | | |
1087 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
1088 | { 8, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | SMART_INCOMING_ONE_NEIGH }, | |
1089 | { 9, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH | | |
1090 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
1091 | { 10, SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
1092 | { 11, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH }, | |
1093 | { 12, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH | | |
1094 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
1095 | { 13, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH | | |
1096 | SMART_OUTGOING_FILTER }, | |
1097 | { 14, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | | |
1098 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
1099 | { 15, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | | |
1100 | SMART_OUTGOING_FILTER }, | |
1101 | { 16, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | SMART_INCOMING_ONE_NEIGH | | |
1102 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
1103 | { 17, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | SMART_INCOMING_ONE_NEIGH | | |
1104 | SMART_OUTGOING_FILTER }, | |
1105 | { 18, SMART_INCOMING_FILTER | | |
1106 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
1107 | { 19, SMART_INCOMING_FILTER | | |
1108 | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
1109 | { -1, 0 } | |
1110 | }; | |
1111 | ||
43c02e7b | 1112 | int |
2acc1418 | 1113 | lldpd_main(int argc, char *argv[]) |
43c02e7b VB |
1114 | { |
1115 | struct lldpd *cfg; | |
77507b69 | 1116 | struct lldpd_chassis *lchassis; |
e809a587 VB |
1117 | int ch, debug = 0; |
1118 | #ifdef USE_SNMP | |
1119 | int snmp = 0; | |
bbea66e1 | 1120 | char *agentx = NULL; /* AgentX socket */ |
e809a587 | 1121 | #endif |
43c02e7b | 1122 | char *mgmtp = NULL; |
5339e725 | 1123 | char *cidp = NULL; |
ba85f9f4 | 1124 | char *interfaces = NULL; |
993a6e50 | 1125 | char *popt, opts[] = |
d4afb919 | 1126 | "H:hkrdxX:m:I:C:p:M:P:S:i@ "; |
de1b1b3a | 1127 | int i, found, advertise_version = 1; |
89840df0 | 1128 | #ifdef ENABLE_LLDPMED |
e809a587 | 1129 | int lldpmed = 0, noinventory = 0; |
89840df0 | 1130 | #endif |
d4afb919 VB |
1131 | char *descr_override = NULL; |
1132 | char *platform_override = NULL; | |
c036b15d | 1133 | char *lsb_release = NULL; |
8482abe9 | 1134 | int smart = 15; |
537a8043 | 1135 | int receiveonly = 0; |
43c02e7b VB |
1136 | |
1137 | saved_argv = argv; | |
1138 | ||
1139 | /* | |
1140 | * Get and parse command line options | |
1141 | */ | |
f0bd3505 | 1142 | popt = strchr(opts, '@'); |
0c877af0 | 1143 | for (i=0; protos[i].mode != 0; i++) |
43c02e7b | 1144 | *(popt++) = protos[i].arg; |
43c02e7b VB |
1145 | *popt = '\0'; |
1146 | while ((ch = getopt(argc, argv, opts)) != -1) { | |
1147 | switch (ch) { | |
b162b740 VB |
1148 | case 'h': |
1149 | usage(); | |
1150 | break; | |
43c02e7b VB |
1151 | case 'd': |
1152 | debug++; | |
1153 | break; | |
537a8043 VB |
1154 | case 'r': |
1155 | receiveonly = 1; | |
1156 | break; | |
43c02e7b VB |
1157 | case 'm': |
1158 | mgmtp = optarg; | |
1159 | break; | |
ba85f9f4 VB |
1160 | case 'I': |
1161 | interfaces = optarg; | |
1162 | break; | |
5339e725 VB |
1163 | case 'C': |
1164 | cidp = optarg; | |
1165 | break; | |
de1b1b3a VB |
1166 | case 'k': |
1167 | advertise_version = 0; | |
1168 | break; | |
e809a587 | 1169 | #ifdef ENABLE_LLDPMED |
115ff55c | 1170 | case 'M': |
89840df0 | 1171 | lldpmed = atoi(optarg); |
e809a587 VB |
1172 | if ((lldpmed < 1) || (lldpmed > 4)) { |
1173 | fprintf(stderr, "-M requires an argument between 1 and 4\n"); | |
89840df0 | 1174 | usage(); |
e809a587 | 1175 | } |
89840df0 | 1176 | break; |
e809a587 | 1177 | case 'i': |
e809a587 | 1178 | noinventory = 1; |
115ff55c | 1179 | break; |
e809a587 | 1180 | #else |
115ff55c VB |
1181 | case 'M': |
1182 | case 'i': | |
e809a587 VB |
1183 | fprintf(stderr, "LLDP-MED support is not built-in\n"); |
1184 | usage(); | |
e809a587 | 1185 | break; |
115ff55c | 1186 | #endif |
e809a587 | 1187 | #ifdef USE_SNMP |
bbea66e1 V |
1188 | case 'x': |
1189 | snmp = 1; | |
1190 | break; | |
1191 | case 'X': | |
43c02e7b | 1192 | snmp = 1; |
bbea66e1 V |
1193 | agentx = optarg; |
1194 | break; | |
e809a587 | 1195 | #else |
bbea66e1 V |
1196 | case 'x': |
1197 | case 'X': | |
e809a587 VB |
1198 | fprintf(stderr, "SNMP support is not built-in\n"); |
1199 | usage(); | |
1200 | #endif | |
43c02e7b | 1201 | break; |
40ce835b ST |
1202 | case 'S': |
1203 | descr_override = strdup(optarg); | |
1204 | break; | |
d4afb919 VB |
1205 | case 'P': |
1206 | platform_override = strdup(optarg); | |
1207 | break; | |
42b39485 | 1208 | case 'H': |
8482abe9 | 1209 | smart = atoi(optarg); |
42b39485 | 1210 | break; |
43c02e7b VB |
1211 | default: |
1212 | found = 0; | |
1213 | for (i=0; protos[i].mode != 0; i++) { | |
43c02e7b | 1214 | if (ch == protos[i].arg) { |
0c877af0 VB |
1215 | protos[i].enabled++; |
1216 | /* When an argument enable | |
1217 | several protocols, only the | |
1218 | first one can be forced. */ | |
1219 | if (found && protos[i].enabled > 1) | |
1220 | protos[i].enabled = 1; | |
43c02e7b VB |
1221 | found = 1; |
1222 | } | |
1223 | } | |
1224 | if (!found) | |
1225 | usage(); | |
1226 | } | |
1227 | } | |
8482abe9 VB |
1228 | |
1229 | /* Set correct smart mode */ | |
1230 | for (i=0; (filters[i].a != -1) && (filters[i].a != smart); i++); | |
1231 | if (filters[i].a == -1) { | |
1232 | fprintf(stderr, "Incorrect mode for -H\n"); | |
1233 | usage(); | |
1234 | } | |
1235 | smart = filters[i].b; | |
115ff55c | 1236 | |
6bb9c4e0 | 1237 | log_init(debug, __progname); |
4b9a5a23 | 1238 | tzset(); /* Get timezone info before chroot */ |
a2993d83 | 1239 | |
eac2f38a VB |
1240 | if (!debug) { |
1241 | int pid; | |
1242 | char *spid; | |
1243 | if (daemon(0, 0) != 0) | |
1244 | fatal("failed to detach daemon"); | |
1245 | if ((pid = open(LLDPD_PID_FILE, | |
0aa5f676 | 1246 | O_TRUNC | O_CREAT | O_WRONLY, 0644)) == -1) |
eac2f38a VB |
1247 | fatal("unable to open pid file " LLDPD_PID_FILE); |
1248 | if (asprintf(&spid, "%d\n", getpid()) == -1) | |
1249 | fatal("unable to create pid file " LLDPD_PID_FILE); | |
1250 | if (write(pid, spid, strlen(spid)) == -1) | |
1251 | fatal("unable to write pid file " LLDPD_PID_FILE); | |
1252 | free(spid); | |
1253 | close(pid); | |
1254 | } | |
1255 | ||
ae87586a MT |
1256 | /* Try to read system information from /etc/os-release if possible. |
1257 | Fall back to lsb_release for compatibility. */ | |
1258 | lsb_release = lldpd_get_os_release(); | |
1259 | if (!lsb_release) { | |
1260 | lsb_release = lldpd_get_lsb_release(); | |
1261 | } | |
c036b15d | 1262 | |
a2993d83 | 1263 | priv_init(PRIVSEP_CHROOT); |
43c02e7b | 1264 | |
43c02e7b VB |
1265 | if ((cfg = (struct lldpd *) |
1266 | calloc(1, sizeof(struct lldpd))) == NULL) | |
1267 | fatal(NULL); | |
1268 | ||
766f32b3 | 1269 | cfg->g_mgmt_pattern = mgmtp; |
5339e725 | 1270 | cfg->g_cid_pattern = cidp; |
ba85f9f4 | 1271 | cfg->g_interfaces = interfaces; |
42b39485 | 1272 | cfg->g_smart = smart; |
537a8043 | 1273 | cfg->g_receiveonly = receiveonly; |
43c02e7b VB |
1274 | |
1275 | /* Get ioctl socket */ | |
1276 | if ((cfg->g_sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) | |
1277 | fatal("failed to get ioctl socket"); | |
1278 | cfg->g_delay = LLDPD_TX_DELAY; | |
1279 | ||
c036b15d | 1280 | /* Description */ |
bf89e7e0 | 1281 | if (!(cfg->g_advertise_version = advertise_version) && lsb_release) |
c036b15d VB |
1282 | /* Remove the \n */ |
1283 | lsb_release[strlen(lsb_release) - 1] = '\0'; | |
1284 | cfg->g_lsb_release = lsb_release; | |
40ce835b ST |
1285 | if (descr_override) |
1286 | cfg->g_descr_override = descr_override; | |
1287 | ||
d4afb919 VB |
1288 | if (platform_override) |
1289 | cfg->g_platform_override = platform_override; | |
1290 | ||
43c02e7b | 1291 | /* Set system capabilities */ |
77507b69 VB |
1292 | if ((lchassis = (struct lldpd_chassis*) |
1293 | calloc(1, sizeof(struct lldpd_chassis))) == NULL) | |
1294 | fatal(NULL); | |
1295 | lchassis->c_cap_available = LLDP_CAP_BRIDGE | LLDP_CAP_WLAN | | |
43c02e7b | 1296 | LLDP_CAP_ROUTER; |
89840df0 VB |
1297 | #ifdef ENABLE_LLDPMED |
1298 | if (lldpmed > 0) { | |
1299 | if (lldpmed == LLDPMED_CLASS_III) | |
77507b69 VB |
1300 | lchassis->c_cap_available |= LLDP_CAP_TELEPHONE; |
1301 | lchassis->c_med_type = lldpmed; | |
1302 | lchassis->c_med_cap_available = LLDPMED_CAP_CAP | | |
4c0d2715 VB |
1303 | LLDPMED_CAP_IV | LLDPMED_CAP_LOCATION | |
1304 | LLDPMED_CAP_POLICY | LLDPMED_CAP_MDI_PSE | LLDPMED_CAP_MDI_PD; | |
740593ff | 1305 | cfg->g_noinventory = noinventory; |
42bddd41 VB |
1306 | } else |
1307 | cfg->g_noinventory = 1; | |
89840df0 | 1308 | #endif |
43c02e7b VB |
1309 | |
1310 | /* Set TTL */ | |
77507b69 | 1311 | lchassis->c_ttl = LLDPD_TTL; |
43c02e7b VB |
1312 | |
1313 | cfg->g_protocols = protos; | |
43c02e7b | 1314 | for (i=0; protos[i].mode != 0; i++) |
0c877af0 VB |
1315 | if (protos[i].enabled > 1) |
1316 | LLOG_INFO("protocol %s enabled and forced", protos[i].name); | |
1317 | else if (protos[i].enabled) | |
43c02e7b | 1318 | LLOG_INFO("protocol %s enabled", protos[i].name); |
0c877af0 | 1319 | else |
43c02e7b | 1320 | LLOG_INFO("protocol %s disabled", protos[i].name); |
43c02e7b VB |
1321 | |
1322 | TAILQ_INIT(&cfg->g_hardware); | |
77507b69 VB |
1323 | TAILQ_INIT(&cfg->g_chassis); |
1324 | TAILQ_INSERT_TAIL(&cfg->g_chassis, lchassis, c_entries); | |
9898ac07 | 1325 | lchassis->c_refcount++; /* We should always keep a reference to local chassis */ |
43c02e7b | 1326 | |
77d7090e VB |
1327 | TAILQ_INIT(&cfg->g_callbacks); |
1328 | ||
43c02e7b VB |
1329 | #ifdef USE_SNMP |
1330 | if (snmp) { | |
1331 | cfg->g_snmp = 1; | |
bbea66e1 | 1332 | agent_init(cfg, agentx, debug); |
43c02e7b VB |
1333 | } |
1334 | #endif /* USE_SNMP */ | |
1335 | ||
1336 | /* Create socket */ | |
6f1046d1 | 1337 | if ((cfg->g_ctl = priv_ctl_create()) == -1) |
b5562b23 | 1338 | fatalx("unable to create control socket " LLDPD_CTL_SOCKET); |
77d7090e VB |
1339 | if (lldpd_callback_add(cfg, cfg->g_ctl, ctl_accept, NULL) != 0) |
1340 | fatalx("unable to add callback for control socket"); | |
43c02e7b | 1341 | |
43c02e7b VB |
1342 | gcfg = cfg; |
1343 | if (atexit(lldpd_exit) != 0) { | |
b5562b23 VB |
1344 | close(cfg->g_ctl); |
1345 | priv_ctl_cleanup(); | |
43c02e7b VB |
1346 | fatal("unable to set exit function"); |
1347 | } | |
43c02e7b VB |
1348 | |
1349 | /* Signal handling */ | |
b5562b23 | 1350 | signal(SIGHUP, lldpd_shutdown); |
43c02e7b VB |
1351 | signal(SIGINT, lldpd_shutdown); |
1352 | signal(SIGTERM, lldpd_shutdown); | |
1353 | ||
1354 | for (;;) | |
1355 | lldpd_loop(cfg); | |
1356 | ||
1357 | return (0); | |
1358 | } |