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4b292b55 | 1 | /* -*- mode: c; c-file-style: "openbsd" -*- */ |
43c02e7b VB |
2 | /* |
3 | * Copyright (c) 2008 Vincent Bernat <bernat@luffy.cx> | |
4 | * | |
51434125 | 5 | * Permission to use, copy, modify, and/or distribute this software for any |
43c02e7b VB |
6 | * purpose with or without fee is hereby granted, provided that the above |
7 | * copyright notice and this permission notice appear in all copies. | |
8 | * | |
9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
16 | */ | |
17 | ||
18 | #include "lldpd.h" | |
bdfe4193 | 19 | #include "trace.h" |
43c02e7b VB |
20 | |
21 | #include <stdio.h> | |
22 | #include <unistd.h> | |
23 | #include <errno.h> | |
630374d4 | 24 | #include <limits.h> |
43c02e7b VB |
25 | #include <signal.h> |
26 | #include <sys/stat.h> | |
27 | #include <fcntl.h> | |
43c02e7b | 28 | #include <time.h> |
a2993d83 | 29 | #include <libgen.h> |
e6b36c87 | 30 | #include <assert.h> |
43c02e7b VB |
31 | #include <sys/utsname.h> |
32 | #include <sys/types.h> | |
c036b15d | 33 | #include <sys/wait.h> |
43c02e7b VB |
34 | #include <sys/socket.h> |
35 | #include <sys/select.h> | |
36 | #include <sys/time.h> | |
37 | #include <sys/ioctl.h> | |
38 | #include <arpa/inet.h> | |
690b944c | 39 | #include <netinet/if_ether.h> |
2e91d1a1 VB |
40 | #include <pwd.h> |
41 | #include <grp.h> | |
43c02e7b | 42 | |
f36b76c1 | 43 | #if HAVE_VFORK_H |
8b549648 | 44 | # include <vfork.h> |
f36b76c1 VB |
45 | #endif |
46 | #if HAVE_WORKING_FORK | |
8b549648 | 47 | # define vfork fork |
f36b76c1 VB |
48 | #endif |
49 | ||
8b549648 | 50 | static void usage(void); |
43c02e7b | 51 | |
8b549648 | 52 | static struct protocol protos[] = { |
0c877af0 | 53 | { LLDPD_MODE_LLDP, 1, "LLDP", 'l', lldp_send, lldp_decode, NULL, |
8b549648 VB |
54 | { LLDP_ADDR_NEAREST_BRIDGE, LLDP_ADDR_NEAREST_NONTPMR_BRIDGE, |
55 | LLDP_ADDR_NEAREST_CUSTOMER_BRIDGE } }, | |
4bad1937 | 56 | #ifdef ENABLE_CDP |
43c02e7b | 57 | { LLDPD_MODE_CDPV1, 0, "CDPv1", 'c', cdpv1_send, cdp_decode, cdpv1_guess, |
8b549648 | 58 | { CDP_MULTICAST_ADDR } }, |
43c02e7b | 59 | { LLDPD_MODE_CDPV2, 0, "CDPv2", 'c', cdpv2_send, cdp_decode, cdpv2_guess, |
8b549648 | 60 | { CDP_MULTICAST_ADDR } }, |
4bad1937 VB |
61 | #endif |
62 | #ifdef ENABLE_SONMP | |
43c02e7b | 63 | { LLDPD_MODE_SONMP, 0, "SONMP", 's', sonmp_send, sonmp_decode, NULL, |
8b549648 | 64 | { SONMP_MULTICAST_ADDR } }, |
4bad1937 VB |
65 | #endif |
66 | #ifdef ENABLE_EDP | |
43c02e7b | 67 | { LLDPD_MODE_EDP, 0, "EDP", 'e', edp_send, edp_decode, NULL, |
8b549648 | 68 | { EDP_MULTICAST_ADDR } }, |
4bad1937 VB |
69 | #endif |
70 | #ifdef ENABLE_FDP | |
031118c4 | 71 | { LLDPD_MODE_FDP, 0, "FDP", 'f', fdp_send, cdp_decode, NULL, |
8b549648 | 72 | { FDP_MULTICAST_ADDR } }, |
4bad1937 | 73 | #endif |
8b549648 | 74 | { 0, 0, "any", ' ', NULL, NULL, NULL, { { 0, 0, 0, 0, 0, 0 } } } |
43c02e7b VB |
75 | }; |
76 | ||
8b549648 | 77 | static char **saved_argv; |
6bb9c4e0 | 78 | #ifdef HAVE___PROGNAME |
8b549648 | 79 | extern const char *__progname; |
6bb9c4e0 | 80 | #else |
8b549648 | 81 | # define __progname "lldpd" |
6bb9c4e0 | 82 | #endif |
43c02e7b | 83 | |
8888d191 | 84 | static void |
43c02e7b VB |
85 | usage(void) |
86 | { | |
4593c0dc VB |
87 | fprintf(stderr, "Usage: %s [OPTIONS ...]\n", __progname); |
88 | fprintf(stderr, "Version: %s\n", PACKAGE_STRING); | |
53132616 VB |
89 | |
90 | fprintf(stderr, "\n"); | |
91 | ||
92 | fprintf(stderr, "-d Do not daemonize.\n"); | |
5e64a80e | 93 | fprintf(stderr, "-r Receive-only mode\n"); |
53132616 | 94 | fprintf(stderr, "-i Disable LLDP-MED inventory TLV transmission.\n"); |
8b549648 VB |
95 | fprintf(stderr, |
96 | "-k Disable advertising of kernel release, version, machine.\n"); | |
fde7a7ce | 97 | fprintf(stderr, "-S descr Override the default system description.\n"); |
d4afb919 | 98 | fprintf(stderr, "-P name Override the default hardware platform.\n"); |
8b549648 VB |
99 | fprintf(stderr, |
100 | "-m IP Specify the IP management addresses of this system.\n"); | |
101 | fprintf(stderr, | |
102 | "-u file Specify the Unix-domain socket used for communication with lldpctl(8).\n"); | |
103 | fprintf(stderr, | |
104 | "-H mode Specify the behaviour when detecting multiple neighbors.\n"); | |
fbda1f9f | 105 | fprintf(stderr, "-I iface Limit interfaces to use.\n"); |
384f5f59 DP |
106 | fprintf(stderr, "-C iface Limit interfaces to use for computing chassis ID.\n"); |
107 | fprintf(stderr, "-L path Override path for lldpcli command.\n"); | |
8b549648 VB |
108 | fprintf(stderr, |
109 | "-O file Override default configuration locations processed by lldpcli(8) at start.\n"); | |
8347587d | 110 | #ifdef ENABLE_LLDPMED |
8b549648 | 111 | fprintf(stderr, |
6003c0d6 | 112 | "-M class Enable emission of LLDP-MED frames. 'class' should be one of:\n"); |
53132616 VB |
113 | fprintf(stderr, " 1 Generic Endpoint (Class I)\n"); |
114 | fprintf(stderr, " 2 Media Endpoint (Class II)\n"); | |
115 | fprintf(stderr, " 3 Communication Device Endpoints (Class III)\n"); | |
116 | fprintf(stderr, " 4 Network Connectivity Device\n"); | |
8347587d VB |
117 | #endif |
118 | #ifdef USE_SNMP | |
53132616 | 119 | fprintf(stderr, "-x Enable SNMP subagent.\n"); |
384f5f59 | 120 | fprintf(stderr, "-X sock Specify the SNMP subagent socket.\n"); |
53132616 VB |
121 | #endif |
122 | fprintf(stderr, "\n"); | |
123 | ||
8b549648 VB |
124 | #if defined ENABLE_CDP || defined ENABLE_EDP || defined ENABLE_FDP || \ |
125 | defined ENABLE_SONMP | |
8347587d | 126 | fprintf(stderr, "Additional protocol support.\n"); |
8b549648 | 127 | # ifdef ENABLE_CDP |
53132616 | 128 | fprintf(stderr, "-c Enable the support of CDP protocol. (Cisco)\n"); |
8b549648 VB |
129 | # endif |
130 | # ifdef ENABLE_EDP | |
53132616 | 131 | fprintf(stderr, "-e Enable the support of EDP protocol. (Extreme)\n"); |
8b549648 VB |
132 | # endif |
133 | # ifdef ENABLE_FDP | |
53132616 | 134 | fprintf(stderr, "-f Enable the support of FDP protocol. (Foundry)\n"); |
8b549648 VB |
135 | # endif |
136 | # ifdef ENABLE_SONMP | |
53132616 | 137 | fprintf(stderr, "-s Enable the support of SONMP protocol. (Nortel)\n"); |
8b549648 | 138 | # endif |
53132616 VB |
139 | |
140 | fprintf(stderr, "\n"); | |
8347587d | 141 | #endif |
53132616 | 142 | |
3071b40a | 143 | fprintf(stderr, "See manual page lldpd(8) for more information\n"); |
43c02e7b VB |
144 | exit(1); |
145 | } | |
146 | ||
6e75df87 | 147 | struct lldpd_hardware * |
32945d6a | 148 | lldpd_get_hardware(struct lldpd *cfg, char *name, int index) |
43c02e7b | 149 | { |
6e75df87 | 150 | struct lldpd_hardware *hardware; |
8b549648 | 151 | TAILQ_FOREACH (hardware, &cfg->g_hardware, h_entries) { |
0a78e14f VB |
152 | if (strcmp(hardware->h_ifname, name) == 0) { |
153 | if (hardware->h_flags == 0) { | |
3d916d6d VB |
154 | if (hardware->h_ifindex != 0 && |
155 | hardware->h_ifindex != index) { | |
8b549648 VB |
156 | log_debug("interfaces", |
157 | "%s changed index: from %d to %d", | |
158 | hardware->h_ifname, hardware->h_ifindex, | |
159 | index); | |
3d916d6d VB |
160 | hardware->h_ifindex_changed = 1; |
161 | } | |
0a78e14f VB |
162 | hardware->h_ifindex = index; |
163 | break; | |
164 | } | |
8b549648 | 165 | if (hardware->h_ifindex == index) break; |
0a78e14f | 166 | } |
43c02e7b | 167 | } |
6e75df87 | 168 | return hardware; |
43c02e7b VB |
169 | } |
170 | ||
9da663f7 VB |
171 | /** |
172 | * Allocate the default local port. This port will be cloned each time we need a | |
173 | * new local port. | |
174 | */ | |
175 | static void | |
176 | lldpd_alloc_default_local_port(struct lldpd *cfg) | |
177 | { | |
178 | struct lldpd_port *port; | |
179 | ||
8b549648 | 180 | if ((port = (struct lldpd_port *)calloc(1, sizeof(struct lldpd_port))) == NULL) |
9da663f7 VB |
181 | fatal("main", NULL); |
182 | ||
183 | #ifdef ENABLE_DOT1 | |
184 | TAILQ_INIT(&port->p_vlans); | |
185 | TAILQ_INIT(&port->p_ppvids); | |
186 | TAILQ_INIT(&port->p_pids); | |
187 | #endif | |
188 | #ifdef ENABLE_CUSTOM | |
189 | TAILQ_INIT(&port->p_custom_list); | |
190 | #endif | |
191 | cfg->g_default_local_port = port; | |
192 | } | |
193 | ||
194 | /** | |
195 | * Clone a given port. The destination needs to be already allocated. | |
196 | */ | |
197 | static int | |
198 | lldpd_clone_port(struct lldpd_port *destination, struct lldpd_port *source) | |
199 | { | |
200 | ||
201 | u_int8_t *output = NULL; | |
202 | ssize_t output_len; | |
203 | struct lldpd_port *cloned = NULL; | |
8b549648 | 204 | output_len = lldpd_port_serialize(source, (void **)&output); |
9da663f7 VB |
205 | if (output_len == -1 || |
206 | lldpd_port_unserialize(output, output_len, &cloned) <= 0) { | |
207 | log_warnx("alloc", "unable to clone default port"); | |
c31f0d8a VB |
208 | free(output); |
209 | return -1; | |
9da663f7 VB |
210 | } |
211 | memcpy(destination, cloned, sizeof(struct lldpd_port)); | |
c31f0d8a VB |
212 | free(cloned); |
213 | free(output); | |
9da663f7 VB |
214 | #ifdef ENABLE_DOT1 |
215 | marshal_repair_tailq(lldpd_vlan, &destination->p_vlans, v_entries); | |
216 | marshal_repair_tailq(lldpd_ppvid, &destination->p_ppvids, p_entries); | |
217 | marshal_repair_tailq(lldpd_pi, &destination->p_pids, p_entries); | |
218 | #endif | |
219 | #ifdef ENABLE_CUSTOM | |
220 | marshal_repair_tailq(lldpd_custom, &destination->p_custom_list, next); | |
221 | #endif | |
222 | return 0; | |
9da663f7 VB |
223 | } |
224 | ||
6e75df87 | 225 | struct lldpd_hardware * |
e12c2365 | 226 | lldpd_alloc_hardware(struct lldpd *cfg, char *name, int index) |
43c02e7b | 227 | { |
6e75df87 | 228 | struct lldpd_hardware *hardware; |
43c02e7b | 229 | |
6f8925be VB |
230 | log_debug("alloc", "allocate a new local port (%s)", name); |
231 | ||
8b549648 VB |
232 | if ((hardware = (struct lldpd_hardware *)calloc(1, |
233 | sizeof(struct lldpd_hardware))) == NULL) | |
6e75df87 | 234 | return NULL; |
43c02e7b | 235 | |
9da663f7 VB |
236 | /* Clone default local port */ |
237 | if (lldpd_clone_port(&hardware->h_lport, cfg->g_default_local_port) == -1) { | |
238 | log_warnx("alloc", "unable to clone default port"); | |
239 | free(hardware); | |
240 | return NULL; | |
241 | } | |
242 | ||
d6e889b6 | 243 | hardware->h_cfg = cfg; |
6e75df87 | 244 | strlcpy(hardware->h_ifname, name, sizeof(hardware->h_ifname)); |
e12c2365 | 245 | hardware->h_ifindex = index; |
6e75df87 | 246 | hardware->h_lport.p_chassis = LOCAL_CHASSIS(cfg); |
9df5ec3d | 247 | hardware->h_lport.p_chassis->c_refcount++; |
6e75df87 | 248 | TAILQ_INIT(&hardware->h_rports); |
43c02e7b | 249 | |
6e75df87 VB |
250 | #ifdef ENABLE_LLDPMED |
251 | if (LOCAL_CHASSIS(cfg)->c_med_cap_available) { | |
4b292b55 | 252 | hardware->h_lport.p_med_cap_enabled = LLDP_MED_CAP_CAP; |
8ec333bd | 253 | if (!cfg->g_config.c_noinventory) |
4b292b55 | 254 | hardware->h_lport.p_med_cap_enabled |= LLDP_MED_CAP_IV; |
6e75df87 VB |
255 | } |
256 | #endif | |
d6e889b6 VB |
257 | |
258 | levent_hardware_init(hardware); | |
6e75df87 | 259 | return hardware; |
43c02e7b VB |
260 | } |
261 | ||
e6b36c87 JV |
262 | struct lldpd_mgmt * |
263 | lldpd_alloc_mgmt(int family, void *addrptr, size_t addrsize, u_int32_t iface) | |
264 | { | |
265 | struct lldpd_mgmt *mgmt; | |
6f8925be VB |
266 | |
267 | log_debug("alloc", "allocate a new management address (family: %d)", family); | |
268 | ||
e6b36c87 JV |
269 | if (family <= LLDPD_AF_UNSPEC || family >= LLDPD_AF_LAST) { |
270 | errno = EAFNOSUPPORT; | |
271 | return NULL; | |
272 | } | |
273 | if (addrsize > LLDPD_MGMT_MAXADDRSIZE) { | |
274 | errno = EOVERFLOW; | |
275 | return NULL; | |
276 | } | |
277 | mgmt = calloc(1, sizeof(struct lldpd_mgmt)); | |
278 | if (mgmt == NULL) { | |
279 | errno = ENOMEM; | |
280 | return NULL; | |
281 | } | |
282 | mgmt->m_family = family; | |
e6b36c87 JV |
283 | memcpy(&mgmt->m_addr, addrptr, addrsize); |
284 | mgmt->m_addrsize = addrsize; | |
285 | mgmt->m_iface = iface; | |
286 | return mgmt; | |
287 | } | |
288 | ||
d9be8ea0 | 289 | void |
6e75df87 | 290 | lldpd_hardware_cleanup(struct lldpd *cfg, struct lldpd_hardware *hardware) |
d9be8ea0 | 291 | { |
6f8925be VB |
292 | log_debug("alloc", "cleanup hardware port %s", hardware->h_ifname); |
293 | ||
17d34115 | 294 | free(hardware->h_lport_previous); |
acb5f65b VB |
295 | free(hardware->h_lchassis_previous_id); |
296 | free(hardware->h_lport_previous_id); | |
aa6e9297 | 297 | free(hardware->h_ifdescr_previous); |
4b292b55 | 298 | lldpd_port_cleanup(&hardware->h_lport, 1); |
dbfa89c6 | 299 | if (hardware->h_ops && hardware->h_ops->cleanup) |
6e75df87 | 300 | hardware->h_ops->cleanup(cfg, hardware); |
d6e889b6 | 301 | levent_hardware_release(hardware); |
d9be8ea0 VB |
302 | free(hardware); |
303 | } | |
304 | ||
47820fc4 | 305 | static void |
aa6e9297 | 306 | lldpd_ifdescr_neighbors(struct lldpd *cfg) |
47820fc4 | 307 | { |
bb37268d | 308 | if (!cfg->g_config.c_set_ifdescr) return; |
47820fc4 | 309 | struct lldpd_hardware *hardware; |
8b549648 | 310 | TAILQ_FOREACH (hardware, &cfg->g_hardware, h_entries) { |
47820fc4 VB |
311 | struct lldpd_port *port; |
312 | char *description; | |
313 | const char *neighbor = NULL; | |
314 | unsigned neighbors = 0; | |
8b549648 | 315 | TAILQ_FOREACH (port, &hardware->h_rports, p_entries) { |
47820fc4 VB |
316 | if (SMART_HIDDEN(port)) continue; |
317 | neighbors++; | |
318 | neighbor = port->p_chassis->c_name; | |
319 | } | |
320 | if (neighbors == 0) | |
aa6e9297 | 321 | description = strdup(""); |
12313820 | 322 | else if (neighbors == 1 && neighbor && *neighbor != '\0') { |
aa6e9297 VB |
323 | if (asprintf(&description, "%s", neighbor) == -1) { |
324 | continue; | |
47820fc4 VB |
325 | } |
326 | } else { | |
8b549648 | 327 | if (asprintf(&description, "%d neighbor%s", neighbors, |
aa6e9297 VB |
328 | (neighbors > 1) ? "s" : "") == -1) { |
329 | continue; | |
47820fc4 VB |
330 | } |
331 | } | |
aa6e9297 VB |
332 | if (hardware->h_ifdescr_previous == NULL || |
333 | strcmp(hardware->h_ifdescr_previous, description)) { | |
334 | priv_iface_description(hardware->h_ifname, description); | |
335 | free(hardware->h_ifdescr_previous); | |
336 | hardware->h_ifdescr_previous = description; | |
337 | } else | |
338 | free(description); | |
47820fc4 VB |
339 | } |
340 | } | |
341 | ||
66879d46 VB |
342 | static void |
343 | lldpd_count_neighbors(struct lldpd *cfg) | |
344 | { | |
e7103aff | 345 | #if HAVE_SETPROCTITLE |
480f1c61 VB |
346 | struct lldpd_chassis *chassis; |
347 | const char *neighbor; | |
66879d46 | 348 | unsigned neighbors = 0; |
8b549648 | 349 | TAILQ_FOREACH (chassis, &cfg->g_chassis, c_entries) { |
480f1c61 VB |
350 | neighbors++; |
351 | neighbor = chassis->c_name; | |
66879d46 | 352 | } |
480f1c61 VB |
353 | neighbors--; |
354 | if (neighbors == 0) | |
bd36a4d3 | 355 | setproctitle("no neighbor."); |
12313820 | 356 | else if (neighbors == 1 && neighbor && *neighbor != '\0') |
bd36a4d3 | 357 | setproctitle("connected to %s.", neighbor); |
480f1c61 | 358 | else |
8b549648 | 359 | setproctitle("%d neighbor%s.", neighbors, (neighbors > 1) ? "s" : ""); |
e7103aff | 360 | #endif |
aa6e9297 | 361 | lldpd_ifdescr_neighbors(cfg); |
66879d46 VB |
362 | } |
363 | ||
4e90a9e0 | 364 | static void |
8b549648 | 365 | notify_clients_deletion(struct lldpd_hardware *hardware, struct lldpd_port *rport) |
4e90a9e0 | 366 | { |
8b549648 VB |
367 | TRACE(LLDPD_NEIGHBOR_DELETE(hardware->h_ifname, rport->p_chassis->c_name, |
368 | rport->p_descr)); | |
369 | levent_ctl_notify(hardware->h_ifname, NEIGHBOR_CHANGE_DELETED, rport); | |
25de85a4 VB |
370 | #ifdef USE_SNMP |
371 | agent_notify(hardware, NEIGHBOR_CHANGE_DELETED, rport); | |
372 | #endif | |
4e90a9e0 VB |
373 | } |
374 | ||
579bedd5 VB |
375 | static void |
376 | lldpd_reset_timer(struct lldpd *cfg) | |
377 | { | |
378 | /* Reset timer for ports that have been changed. */ | |
379 | struct lldpd_hardware *hardware; | |
8b549648 | 380 | TAILQ_FOREACH (hardware, &cfg->g_hardware, h_entries) { |
17d34115 VB |
381 | /* We keep a flat copy of the local port to see if there is any |
382 | * change. To do this, we zero out fields that are not | |
383 | * significant, marshal the port, then restore. */ | |
579bedd5 | 384 | struct lldpd_port *port = &hardware->h_lport; |
196757ce VB |
385 | /* Take the current flags into account to detect a change. */ |
386 | port->_p_hardware_flags = hardware->h_flags; | |
579bedd5 | 387 | u_int8_t *output = NULL; |
324d73a3 | 388 | ssize_t output_len; |
28414fbd | 389 | char save[LLDPD_PORT_START_MARKER]; |
579bedd5 | 390 | memcpy(save, port, sizeof(save)); |
109c41b9 | 391 | /* coverity[sizeof_mismatch] |
87dfd175 | 392 | We intentionally partially memset port */ |
579bedd5 | 393 | memset(port, 0, sizeof(save)); |
8b549648 | 394 | output_len = lldpd_port_serialize(port, (void **)&output); |
579bedd5 VB |
395 | memcpy(port, save, sizeof(save)); |
396 | if (output_len == -1) { | |
397 | log_warnx("localchassis", | |
398 | "unable to serialize local port %s to check for differences", | |
399 | hardware->h_ifname); | |
400 | continue; | |
401 | } | |
17d34115 VB |
402 | |
403 | /* Compare with the previous value */ | |
8b549648 | 404 | if (!hardware->h_ifindex_changed && hardware->h_lport_previous && |
17d34115 VB |
405 | output_len == hardware->h_lport_previous_len && |
406 | !memcmp(output, hardware->h_lport_previous, output_len)) { | |
8b549648 | 407 | log_debug("localchassis", "no change detected for port %s", |
579bedd5 | 408 | hardware->h_ifname); |
579bedd5 VB |
409 | } else { |
410 | log_debug("localchassis", | |
17d34115 | 411 | "change detected for port %s, resetting its timer", |
579bedd5 | 412 | hardware->h_ifname); |
3d916d6d | 413 | hardware->h_ifindex_changed = 0; |
17d34115 | 414 | levent_schedule_pdu(hardware); |
579bedd5 | 415 | } |
17d34115 VB |
416 | |
417 | /* Update the value */ | |
418 | free(hardware->h_lport_previous); | |
419 | hardware->h_lport_previous = output; | |
420 | hardware->h_lport_previous_len = output_len; | |
579bedd5 VB |
421 | } |
422 | } | |
423 | ||
24cb9684 VB |
424 | static void |
425 | lldpd_all_chassis_cleanup(struct lldpd *cfg) | |
426 | { | |
427 | struct lldpd_chassis *chassis, *chassis_next; | |
428 | log_debug("localchassis", "cleanup all chassis"); | |
429 | ||
8b549648 | 430 | for (chassis = TAILQ_FIRST(&cfg->g_chassis); chassis; chassis = chassis_next) { |
24cb9684 VB |
431 | chassis_next = TAILQ_NEXT(chassis, c_entries); |
432 | if (chassis->c_refcount == 0) { | |
433 | TAILQ_REMOVE(&cfg->g_chassis, chassis, c_entries); | |
434 | lldpd_chassis_cleanup(chassis, 1); | |
435 | } | |
436 | } | |
437 | } | |
438 | ||
3333d2a8 | 439 | void |
43c02e7b VB |
440 | lldpd_cleanup(struct lldpd *cfg) |
441 | { | |
442 | struct lldpd_hardware *hardware, *hardware_next; | |
443 | ||
3333d2a8 | 444 | log_debug("localchassis", "cleanup all ports"); |
6f8925be | 445 | |
43c02e7b VB |
446 | for (hardware = TAILQ_FIRST(&cfg->g_hardware); hardware != NULL; |
447 | hardware = hardware_next) { | |
448 | hardware_next = TAILQ_NEXT(hardware, h_entries); | |
6e75df87 | 449 | if (!hardware->h_flags) { |
8b549648 VB |
450 | int m = cfg->g_config.c_perm_ifaces ? |
451 | pattern_match(hardware->h_ifname, | |
452 | cfg->g_config.c_perm_ifaces, 0) : | |
0a78e14f VB |
453 | 0; |
454 | switch (m) { | |
8b9da822 | 455 | case PATTERN_MATCH_DENIED: |
8b549648 VB |
456 | log_debug("localchassis", |
457 | "delete non-permanent interface %s", | |
0a78e14f VB |
458 | hardware->h_ifname); |
459 | TRACE(LLDPD_INTERFACES_DELETE(hardware->h_ifname)); | |
460 | TAILQ_REMOVE(&cfg->g_hardware, hardware, h_entries); | |
8b549648 VB |
461 | lldpd_remote_cleanup(hardware, notify_clients_deletion, |
462 | 1); | |
0a78e14f VB |
463 | lldpd_hardware_cleanup(cfg, hardware); |
464 | break; | |
8b9da822 VB |
465 | case PATTERN_MATCH_ALLOWED: |
466 | case PATTERN_MATCH_ALLOWED_EXACT: | |
0a78e14f VB |
467 | log_debug("localchassis", "do not delete %s, permanent", |
468 | hardware->h_ifname); | |
8b549648 VB |
469 | lldpd_remote_cleanup(hardware, notify_clients_deletion, |
470 | 1); | |
0a78e14f VB |
471 | break; |
472 | } | |
0da01fd6 | 473 | } else { |
7f0877f0 VB |
474 | lldpd_remote_cleanup(hardware, notify_clients_deletion, |
475 | !(hardware->h_flags & IFF_RUNNING)); | |
0da01fd6 | 476 | } |
43c02e7b | 477 | } |
aadc9936 | 478 | |
3333d2a8 | 479 | levent_schedule_cleanup(cfg); |
24cb9684 VB |
480 | lldpd_all_chassis_cleanup(cfg); |
481 | lldpd_count_neighbors(cfg); | |
43c02e7b VB |
482 | } |
483 | ||
d938c51f VB |
484 | /* Update chassis `ochassis' with values from `chassis'. The later one is not |
485 | expected to be part of a list! It will also be wiped from memory. */ | |
566c635d | 486 | static void |
8b549648 VB |
487 | lldpd_move_chassis(struct lldpd_chassis *ochassis, struct lldpd_chassis *chassis) |
488 | { | |
5fd6695c VB |
489 | struct lldpd_mgmt *mgmt, *mgmt_next; |
490 | ||
566c635d VB |
491 | /* We want to keep refcount, index and list stuff from the current |
492 | * chassis */ | |
d938c51f | 493 | TAILQ_ENTRY(lldpd_chassis) entries; |
566c635d VB |
494 | int refcount = ochassis->c_refcount; |
495 | int index = ochassis->c_index; | |
8b549648 | 496 | memcpy(&entries, &ochassis->c_entries, sizeof(entries)); |
566c635d | 497 | lldpd_chassis_cleanup(ochassis, 0); |
d938c51f VB |
498 | |
499 | /* Make the copy. */ | |
500 | /* WARNING: this is a kludgy hack, we need in-place copy and cannot use | |
501 | * marshaling. */ | |
566c635d | 502 | memcpy(ochassis, chassis, sizeof(struct lldpd_chassis)); |
d938c51f VB |
503 | TAILQ_INIT(&ochassis->c_mgmt); |
504 | ||
505 | /* Copy of management addresses */ | |
8b549648 | 506 | for (mgmt = TAILQ_FIRST(&chassis->c_mgmt); mgmt != NULL; mgmt = mgmt_next) { |
d938c51f VB |
507 | mgmt_next = TAILQ_NEXT(mgmt, m_entries); |
508 | TAILQ_REMOVE(&chassis->c_mgmt, mgmt, m_entries); | |
509 | TAILQ_INSERT_TAIL(&ochassis->c_mgmt, mgmt, m_entries); | |
510 | } | |
511 | ||
566c635d VB |
512 | /* Restore saved values */ |
513 | ochassis->c_refcount = refcount; | |
514 | ochassis->c_index = index; | |
515 | memcpy(&ochassis->c_entries, &entries, sizeof(entries)); | |
d938c51f VB |
516 | |
517 | /* Get rid of the new chassis */ | |
518 | free(chassis); | |
566c635d VB |
519 | } |
520 | ||
8888d191 | 521 | static int |
43c02e7b VB |
522 | lldpd_guess_type(struct lldpd *cfg, char *frame, int s) |
523 | { | |
c2e8c8c7 | 524 | size_t i, j; |
8b549648 | 525 | if (s < ETHER_ADDR_LEN) return -1; |
c2e8c8c7 | 526 | for (i = 0; cfg->g_protocols[i].mode != 0; i++) { |
8b549648 | 527 | if (!cfg->g_protocols[i].enabled) continue; |
43c02e7b | 528 | if (cfg->g_protocols[i].guess == NULL) { |
8b549648 VB |
529 | for (j = 0; j < sizeof(cfg->g_protocols[0].mac) / |
530 | sizeof(cfg->g_protocols[0].mac[0]); | |
c2e8c8c7 | 531 | j++) { |
8b549648 VB |
532 | if (memcmp(frame, cfg->g_protocols[i].mac[j], |
533 | ETHER_ADDR_LEN) == 0) { | |
534 | log_debug("decode", | |
535 | "guessed protocol is %s (from MAC address)", | |
c2e8c8c7 VB |
536 | cfg->g_protocols[i].name); |
537 | return cfg->g_protocols[i].mode; | |
538 | } | |
6f8925be | 539 | } |
43c02e7b | 540 | } else { |
6f8925be | 541 | if (cfg->g_protocols[i].guess(frame, s)) { |
8b549648 VB |
542 | log_debug("decode", |
543 | "guessed protocol is %s (from detector function)", | |
6f8925be | 544 | cfg->g_protocols[i].name); |
43c02e7b | 545 | return cfg->g_protocols[i].mode; |
6f8925be | 546 | } |
43c02e7b VB |
547 | } |
548 | } | |
549 | return -1; | |
550 | } | |
551 | ||
8888d191 | 552 | static void |
8b549648 | 553 | lldpd_decode(struct lldpd *cfg, char *frame, int s, struct lldpd_hardware *hardware) |
43c02e7b | 554 | { |
281a5cd4 | 555 | int i; |
77507b69 | 556 | struct lldpd_chassis *chassis, *ochassis = NULL; |
4e90a9e0 | 557 | struct lldpd_port *port, *oport = NULL, *aport; |
43c02e7b VB |
558 | int guess = LLDPD_MODE_LLDP; |
559 | ||
8b549648 | 560 | log_debug("decode", "decode a received frame on %s", hardware->h_ifname); |
6f8925be | 561 | |
32f0deee | 562 | if (s < sizeof(struct ether_header) + 4) { |
49697208 | 563 | /* Too short, just discard it */ |
32f0deee | 564 | hardware->h_rx_discarded_cnt++; |
50a89ca7 | 565 | return; |
32f0deee | 566 | } |
02cf0357 | 567 | |
49697208 | 568 | /* Decapsulate VLAN frames */ |
02cf0357 VB |
569 | struct ether_header eheader; |
570 | memcpy(&eheader, frame, sizeof(struct ether_header)); | |
571 | if (eheader.ether_type == htons(ETHERTYPE_VLAN)) { | |
49697208 | 572 | /* VLAN decapsulation means to shift 4 bytes left the frame from |
4e5f34c5 | 573 | * offset 2*ETHER_ADDR_LEN */ |
8b549648 VB |
574 | memmove(frame + 2 * ETHER_ADDR_LEN, frame + 2 * ETHER_ADDR_LEN + 4, |
575 | s - 2 * ETHER_ADDR_LEN); | |
49697208 VB |
576 | s -= 4; |
577 | } | |
50a89ca7 | 578 | |
8b549648 VB |
579 | TAILQ_FOREACH (oport, &hardware->h_rports, p_entries) { |
580 | if ((oport->p_lastframe != NULL) && (oport->p_lastframe->size == s) && | |
77507b69 VB |
581 | (memcmp(oport->p_lastframe->frame, frame, s) == 0)) { |
582 | /* Already received the same frame */ | |
6f8925be | 583 | log_debug("decode", "duplicate frame, no need to decode"); |
77507b69 VB |
584 | oport->p_lastupdate = time(NULL); |
585 | return; | |
586 | } | |
43c02e7b VB |
587 | } |
588 | ||
f2dcb180 | 589 | guess = lldpd_guess_type(cfg, frame, s); |
8b549648 VB |
590 | for (i = 0; cfg->g_protocols[i].mode != 0; i++) { |
591 | if (!cfg->g_protocols[i].enabled) continue; | |
f2dcb180 | 592 | if (cfg->g_protocols[i].mode == guess) { |
6f8925be VB |
593 | log_debug("decode", "using decode function for %s protocol", |
594 | cfg->g_protocols[i].name); | |
8b549648 VB |
595 | if (cfg->g_protocols[i].decode(cfg, frame, s, hardware, |
596 | &chassis, &port) == -1) { | |
597 | log_debug("decode", | |
598 | "function for %s protocol did not decode this frame", | |
6f8925be | 599 | cfg->g_protocols[i].name); |
32f0deee | 600 | hardware->h_rx_discarded_cnt++; |
f2dcb180 | 601 | return; |
6f8925be | 602 | } |
77507b69 VB |
603 | chassis->c_protocol = port->p_protocol = |
604 | cfg->g_protocols[i].mode; | |
f2dcb180 | 605 | break; |
8b549648 | 606 | } |
f2dcb180 VB |
607 | } |
608 | if (cfg->g_protocols[i].mode == 0) { | |
6f8925be | 609 | log_debug("decode", "unable to guess frame type on %s", |
ba5116b5 | 610 | hardware->h_ifname); |
43c02e7b | 611 | return; |
f2dcb180 | 612 | } |
8b549648 VB |
613 | TRACE(LLDPD_FRAME_DECODED(hardware->h_ifname, cfg->g_protocols[i].name, |
614 | chassis->c_name, port->p_descr)); | |
43c02e7b | 615 | |
77507b69 | 616 | /* Do we already have the same MSAP somewhere? */ |
42589660 | 617 | int count = 0; |
6f8925be | 618 | log_debug("decode", "search for the same MSAP"); |
8b549648 | 619 | TAILQ_FOREACH (oport, &hardware->h_rports, p_entries) { |
42589660 VB |
620 | if (port->p_protocol == oport->p_protocol) { |
621 | count++; | |
622 | if ((port->p_id_subtype == oport->p_id_subtype) && | |
623 | (port->p_id_len == oport->p_id_len) && | |
624 | (memcmp(port->p_id, oport->p_id, port->p_id_len) == 0) && | |
625 | (chassis->c_id_subtype == oport->p_chassis->c_id_subtype) && | |
626 | (chassis->c_id_len == oport->p_chassis->c_id_len) && | |
627 | (memcmp(chassis->c_id, oport->p_chassis->c_id, | |
8b549648 | 628 | chassis->c_id_len) == 0)) { |
42589660 VB |
629 | ochassis = oport->p_chassis; |
630 | log_debug("decode", "MSAP is already known"); | |
631 | break; | |
632 | } | |
77507b69 | 633 | } |
43c02e7b | 634 | } |
42589660 | 635 | /* Do we have room for a new MSAP? */ |
ad21b578 | 636 | if (!oport && cfg->g_config.c_max_neighbors) { |
8b549648 VB |
637 | if (count == (cfg->g_config.c_max_neighbors - 1)) { |
638 | log_debug("decode", | |
639 | "max neighbors %d reached for port %s, " | |
640 | "dropping any new ones silently", | |
641 | cfg->g_config.c_max_neighbors, hardware->h_ifname); | |
642 | } else if (count > cfg->g_config.c_max_neighbors - 1) { | |
643 | log_debug("decode", | |
644 | "too many neighbors for port %s, drop this new one", | |
645 | hardware->h_ifname); | |
646 | lldpd_port_cleanup(port, 1); | |
647 | lldpd_chassis_cleanup(chassis, 1); | |
648 | free(port); | |
649 | return; | |
650 | } | |
42589660 | 651 | } |
77507b69 VB |
652 | /* No, but do we already know the system? */ |
653 | if (!oport) { | |
6f8925be | 654 | log_debug("decode", "MSAP is unknown, search for the chassis"); |
8b549648 | 655 | TAILQ_FOREACH (ochassis, &cfg->g_chassis, c_entries) { |
77507b69 VB |
656 | if ((chassis->c_protocol == ochassis->c_protocol) && |
657 | (chassis->c_id_subtype == ochassis->c_id_subtype) && | |
658 | (chassis->c_id_len == ochassis->c_id_len) && | |
8b549648 VB |
659 | (memcmp(chassis->c_id, ochassis->c_id, chassis->c_id_len) == |
660 | 0)) | |
661 | break; | |
43c02e7b | 662 | } |
43c02e7b | 663 | } |
43c02e7b | 664 | |
77507b69 VB |
665 | if (oport) { |
666 | /* The port is known, remove it before adding it back */ | |
667 | TAILQ_REMOVE(&hardware->h_rports, oport, p_entries); | |
4b292b55 | 668 | lldpd_port_cleanup(oport, 1); |
4e624dc2 | 669 | free(oport); |
77507b69 VB |
670 | } |
671 | if (ochassis) { | |
a9fe956f VB |
672 | if (port->p_ttl == 0) { |
673 | /* Shutdown LLDPDU is special. We do not want to replace | |
674 | * the chassis. Free the new chassis (which is mostly empty) */ | |
675 | log_debug("decode", "received a shutdown LLDPDU"); | |
676 | lldpd_chassis_cleanup(chassis, 1); | |
677 | } else { | |
678 | lldpd_move_chassis(ochassis, chassis); | |
679 | } | |
77507b69 VB |
680 | chassis = ochassis; |
681 | } else { | |
682 | /* Chassis not known, add it */ | |
6f8925be | 683 | log_debug("decode", "unknown chassis, add it to the list"); |
77507b69 | 684 | chassis->c_index = ++cfg->g_lastrid; |
77507b69 VB |
685 | chassis->c_refcount = 0; |
686 | TAILQ_INSERT_TAIL(&cfg->g_chassis, chassis, c_entries); | |
8b549648 VB |
687 | i = 0; |
688 | TAILQ_FOREACH (ochassis, &cfg->g_chassis, c_entries) | |
689 | i++; | |
6f8925be | 690 | log_debug("decode", "%d different systems are known", i); |
77507b69 VB |
691 | } |
692 | /* Add port */ | |
693 | port->p_lastchange = port->p_lastupdate = time(NULL); | |
8b549648 VB |
694 | if ((port->p_lastframe = (struct lldpd_frame *)malloc( |
695 | s + sizeof(struct lldpd_frame))) != NULL) { | |
77507b69 VB |
696 | port->p_lastframe->size = s; |
697 | memcpy(port->p_lastframe->frame, frame, s); | |
698 | } | |
699 | TAILQ_INSERT_TAIL(&hardware->h_rports, port, p_entries); | |
700 | port->p_chassis = chassis; | |
701 | port->p_chassis->c_refcount++; | |
9df5ec3d VB |
702 | /* Several cases are possible : |
703 | 1. chassis is new, its refcount was 0. It is now attached | |
8b549648 | 704 | to this port, its refcount is 1. |
9df5ec3d | 705 | 2. chassis already exists and was attached to another |
8b549648 | 706 | port, we increase its refcount accordingly. |
9df5ec3d | 707 | 3. chassis already exists and was attached to the same |
8b549648 VB |
708 | port, its refcount was decreased with |
709 | lldpd_port_cleanup() and is now increased again. | |
9df5ec3d VB |
710 | |
711 | In all cases, if the port already existed, it has been | |
712 | freed with lldpd_port_cleanup() and therefore, the refcount | |
713 | of the chassis that was attached to it is decreased. | |
714 | */ | |
109c41b9 | 715 | i = 0; |
87dfd175 VB |
716 | /* coverity[use_after_free] |
717 | TAILQ_REMOVE does the right thing */ | |
8b549648 | 718 | TAILQ_FOREACH (aport, &hardware->h_rports, p_entries) |
42b39485 | 719 | i++; |
8b549648 | 720 | log_debug("decode", "%d neighbors for %s", i, hardware->h_ifname); |
4e90a9e0 | 721 | |
25de85a4 VB |
722 | if (!oport) hardware->h_insert_cnt++; |
723 | ||
4e90a9e0 | 724 | /* Notify */ |
8b549648 | 725 | log_debug("decode", "send notifications for changes on %s", hardware->h_ifname); |
bdfe4193 | 726 | if (oport) { |
8b549648 VB |
727 | TRACE(LLDPD_NEIGHBOR_UPDATE(hardware->h_ifname, chassis->c_name, |
728 | port->p_descr, i)); | |
bdfe4193 | 729 | levent_ctl_notify(hardware->h_ifname, NEIGHBOR_CHANGE_UPDATED, port); |
25de85a4 | 730 | #ifdef USE_SNMP |
bdfe4193 | 731 | agent_notify(hardware, NEIGHBOR_CHANGE_UPDATED, port); |
25de85a4 | 732 | #endif |
bdfe4193 | 733 | } else { |
8b549648 VB |
734 | TRACE(LLDPD_NEIGHBOR_NEW(hardware->h_ifname, chassis->c_name, |
735 | port->p_descr, i)); | |
bdfe4193 VB |
736 | levent_ctl_notify(hardware->h_ifname, NEIGHBOR_CHANGE_ADDED, port); |
737 | #ifdef USE_SNMP | |
738 | agent_notify(hardware, NEIGHBOR_CHANGE_ADDED, port); | |
739 | #endif | |
740 | } | |
4e90a9e0 | 741 | |
be511d00 VB |
742 | #ifdef ENABLE_LLDPMED |
743 | if (!oport && port->p_chassis->c_med_type) { | |
b9de0ca6 | 744 | /* New neighbor, fast start */ |
745 | if (hardware->h_cfg->g_config.c_enable_fast_start && | |
be511d00 | 746 | !hardware->h_tx_fast) { |
8b549648 VB |
747 | log_debug("decode", |
748 | "%s: entering fast start due to " | |
749 | "new neighbor", | |
750 | hardware->h_ifname); | |
b9de0ca6 | 751 | hardware->h_tx_fast = hardware->h_cfg->g_config.c_tx_fast_init; |
752 | } | |
753 | ||
754 | levent_schedule_pdu(hardware); | |
755 | } | |
be511d00 | 756 | #endif |
b9de0ca6 | 757 | |
43c02e7b VB |
758 | return; |
759 | } | |
760 | ||
c036b15d VB |
761 | /* Get the output of lsb_release -s -d. This is a slow function. It should be |
762 | called once. It return NULL if any problem happens. Otherwise, this is a | |
763 | statically allocated buffer. The result includes the trailing \n */ | |
764 | static char * | |
8b549648 VB |
765 | lldpd_get_lsb_release() |
766 | { | |
c036b15d | 767 | static char release[1024]; |
f540397c GS |
768 | char cmd[][12] = { "lsb_release", "-s", "-d" }; |
769 | char *const command[] = { cmd[0], cmd[1], cmd[2], NULL }; | |
c036b15d VB |
770 | int pid, status, devnull, count; |
771 | int pipefd[2]; | |
772 | ||
6f8925be VB |
773 | log_debug("localchassis", "grab LSB release"); |
774 | ||
c036b15d | 775 | if (pipe(pipefd)) { |
6f8925be | 776 | log_warn("localchassis", "unable to get a pair of pipes"); |
c036b15d VB |
777 | return NULL; |
778 | } | |
779 | ||
45bf0bd0 VB |
780 | pid = vfork(); |
781 | switch (pid) { | |
782 | case -1: | |
6f8925be | 783 | log_warn("localchassis", "unable to fork"); |
c036b15d | 784 | return NULL; |
c036b15d VB |
785 | case 0: |
786 | /* Child, exec lsb_release */ | |
787 | close(pipefd[0]); | |
788 | if ((devnull = open("/dev/null", O_RDWR, 0)) != -1) { | |
789 | dup2(devnull, STDIN_FILENO); | |
790 | dup2(devnull, STDERR_FILENO); | |
791 | dup2(pipefd[1], STDOUT_FILENO); | |
792 | if (devnull > 2) close(devnull); | |
793 | if (pipefd[1] > 2) close(pipefd[1]); | |
794 | execvp("lsb_release", command); | |
795 | } | |
45bf0bd0 | 796 | _exit(127); |
c036b15d VB |
797 | break; |
798 | default: | |
799 | /* Father, read the output from the children */ | |
800 | close(pipefd[1]); | |
801 | count = 0; | |
802 | do { | |
8b549648 VB |
803 | status = |
804 | read(pipefd[0], release + count, sizeof(release) - count); | |
c036b15d | 805 | if ((status == -1) && (errno == EINTR)) continue; |
8b549648 | 806 | if (status > 0) count += status; |
c036b15d VB |
807 | } while (count < sizeof(release) && (status > 0)); |
808 | if (status < 0) { | |
6f8925be | 809 | log_info("localchassis", "unable to read from lsb_release"); |
c036b15d VB |
810 | close(pipefd[0]); |
811 | waitpid(pid, &status, 0); | |
812 | return NULL; | |
813 | } | |
814 | close(pipefd[0]); | |
815 | if (count >= sizeof(release)) { | |
6f8925be | 816 | log_info("localchassis", "output of lsb_release is too large"); |
c036b15d VB |
817 | waitpid(pid, &status, 0); |
818 | return NULL; | |
819 | } | |
820 | status = -1; | |
8b549648 | 821 | if (waitpid(pid, &status, 0) != pid) return NULL; |
c036b15d | 822 | if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) { |
8b549648 VB |
823 | log_info("localchassis", |
824 | "lsb_release information not available"); | |
c036b15d VB |
825 | return NULL; |
826 | } | |
827 | if (!count) { | |
8b549648 VB |
828 | log_info("localchassis", |
829 | "lsb_release returned an empty string"); | |
c036b15d VB |
830 | return NULL; |
831 | } | |
832 | release[count] = '\0'; | |
833 | return release; | |
834 | } | |
835 | /* Should not be here */ | |
836 | return NULL; | |
837 | } | |
838 | ||
ae87586a MT |
839 | /* Same like lldpd_get_lsb_release but reads /etc/os-release for PRETTY_NAME=. */ |
840 | static char * | |
8b549648 VB |
841 | lldpd_get_os_release() |
842 | { | |
ae87586a | 843 | static char release[1024]; |
9757bfbc SK |
844 | char line[1024]; |
845 | char *key, *val; | |
846 | char *ptr1 = release; | |
ae87586a | 847 | |
6f8925be | 848 | log_debug("localchassis", "grab OS release"); |
f24382c4 VB |
849 | FILE *fp = fopen("/etc/os-release", "r"); |
850 | if (!fp) { | |
851 | log_debug("localchassis", "could not open /etc/os-release"); | |
852 | fp = fopen("/usr/lib/os-release", "r"); | |
853 | } | |
ae87586a | 854 | if (!fp) { |
f24382c4 VB |
855 | log_info("localchassis", |
856 | "could not open either /etc/os-release or /usr/lib/os-release"); | |
ae87586a MT |
857 | return NULL; |
858 | } | |
859 | ||
e2b09091 | 860 | while ((fgets(line, sizeof(line), fp) != NULL)) { |
ae87586a MT |
861 | key = strtok(line, "="); |
862 | val = strtok(NULL, "="); | |
863 | ||
e2b09091 VB |
864 | if (strncmp(key, "PRETTY_NAME", sizeof(line)) == 0) { |
865 | strlcpy(release, val, sizeof(line)); | |
ae87586a MT |
866 | break; |
867 | } | |
868 | } | |
869 | fclose(fp); | |
870 | ||
871 | /* Remove trailing newline and all " in the string. */ | |
dc21d049 | 872 | ptr1 = release + strlen(release) - 1; |
8b549648 | 873 | while (ptr1 != release && ((*ptr1 == '"') || (*ptr1 == '\n'))) { |
dc21d049 VB |
874 | *ptr1 = '\0'; |
875 | ptr1--; | |
ae87586a | 876 | } |
8b549648 | 877 | if (release[0] == '"') return release + 1; |
ae87586a MT |
878 | return release; |
879 | } | |
880 | ||
8482abe9 | 881 | static void |
8b549648 VB |
882 | lldpd_hide_ports(struct lldpd *cfg, struct lldpd_hardware *hardware, int mask) |
883 | { | |
42b39485 | 884 | struct lldpd_port *port; |
8b549648 | 885 | int protocols[LLDPD_MODE_MAX + 1]; |
8482abe9 VB |
886 | char buffer[256]; |
887 | int i, j, k, found; | |
42b39485 VB |
888 | unsigned int min; |
889 | ||
8b549648 | 890 | log_debug("smartfilter", "apply smart filter for port %s", hardware->h_ifname); |
6f8925be | 891 | |
8482abe9 | 892 | /* Compute the number of occurrences of each protocol */ |
8b549648 VB |
893 | for (i = 0; i <= LLDPD_MODE_MAX; i++) |
894 | protocols[i] = 0; | |
895 | TAILQ_FOREACH (port, &hardware->h_rports, p_entries) | |
8482abe9 VB |
896 | protocols[port->p_protocol]++; |
897 | ||
898 | /* Turn the protocols[] array into an array of | |
899 | enabled/disabled protocols. 1 means enabled, 0 | |
900 | means disabled. */ | |
901 | min = (unsigned int)-1; | |
902 | for (i = 0; i <= LLDPD_MODE_MAX; i++) | |
8b549648 | 903 | if (protocols[i] && (protocols[i] < min)) min = protocols[i]; |
8482abe9 VB |
904 | found = 0; |
905 | for (i = 0; i <= LLDPD_MODE_MAX; i++) | |
906 | if ((protocols[i] == min) && !found) { | |
907 | /* If we need a tie breaker, we take | |
908 | the first protocol only */ | |
8ec333bd | 909 | if (cfg->g_config.c_smart & mask & |
8482abe9 VB |
910 | (SMART_OUTGOING_ONE_PROTO | SMART_INCOMING_ONE_PROTO)) |
911 | found = 1; | |
912 | protocols[i] = 1; | |
8b549648 VB |
913 | } else |
914 | protocols[i] = 0; | |
8482abe9 VB |
915 | |
916 | /* We set the p_hidden flag to 1 if the protocol is disabled */ | |
8b549648 | 917 | TAILQ_FOREACH (port, &hardware->h_rports, p_entries) { |
8482abe9 | 918 | if (mask == SMART_OUTGOING) |
8b549648 | 919 | port->p_hidden_out = protocols[port->p_protocol] ? 0 : 1; |
8482abe9 | 920 | else |
8b549648 | 921 | port->p_hidden_in = protocols[port->p_protocol] ? 0 : 1; |
8482abe9 VB |
922 | } |
923 | ||
924 | /* If we want only one neighbor, we take the first one */ | |
8ec333bd | 925 | if (cfg->g_config.c_smart & mask & |
8482abe9 | 926 | (SMART_OUTGOING_ONE_NEIGH | SMART_INCOMING_ONE_NEIGH)) { |
42b39485 | 927 | found = 0; |
8b549648 | 928 | TAILQ_FOREACH (port, &hardware->h_rports, p_entries) { |
8482abe9 VB |
929 | if (mask == SMART_OUTGOING) { |
930 | if (found) port->p_hidden_out = 1; | |
8b549648 | 931 | if (!port->p_hidden_out) found = 1; |
8482abe9 VB |
932 | } |
933 | if (mask == SMART_INCOMING) { | |
934 | if (found) port->p_hidden_in = 1; | |
8b549648 | 935 | if (!port->p_hidden_in) found = 1; |
42b39485 VB |
936 | } |
937 | } | |
8482abe9 | 938 | } |
42b39485 | 939 | |
8482abe9 | 940 | /* Print a debug message summarizing the operation */ |
8b549648 VB |
941 | for (i = 0; i <= LLDPD_MODE_MAX; i++) |
942 | protocols[i] = 0; | |
8482abe9 | 943 | k = j = 0; |
8b549648 | 944 | TAILQ_FOREACH (port, &hardware->h_rports, p_entries) { |
8482abe9 | 945 | if (!(((mask == SMART_OUTGOING) && port->p_hidden_out) || |
8b549648 | 946 | ((mask == SMART_INCOMING) && port->p_hidden_in))) { |
8482abe9 VB |
947 | k++; |
948 | protocols[port->p_protocol] = 1; | |
42b39485 | 949 | } |
8482abe9 VB |
950 | j++; |
951 | } | |
952 | buffer[0] = '\0'; | |
8b549648 VB |
953 | for (i = 0; cfg->g_protocols[i].mode != 0; i++) { |
954 | if (cfg->g_protocols[i].enabled && | |
955 | protocols[cfg->g_protocols[i].mode]) { | |
956 | if (strlen(buffer) + strlen(cfg->g_protocols[i].name) + 3 > | |
957 | sizeof(buffer)) { | |
8482abe9 VB |
958 | /* Unlikely, our buffer is too small */ |
959 | memcpy(buffer + sizeof(buffer) - 4, "...", 4); | |
960 | break; | |
42b39485 | 961 | } |
247fb1a9 VB |
962 | if (buffer[0]) |
963 | strncat(buffer, ", ", | |
964 | sizeof(buffer) - strlen(buffer) - 1); | |
8b549648 | 965 | strncat(buffer, cfg->g_protocols[i].name, |
247fb1a9 | 966 | sizeof(buffer) - strlen(buffer) - 1); |
42b39485 VB |
967 | } |
968 | } | |
6f8925be | 969 | log_debug("smartfilter", "%s: %s: %d visible neighbors (out of %d)", |
8b549648 | 970 | hardware->h_ifname, (mask == SMART_OUTGOING) ? "out filter" : "in filter", |
6f8925be | 971 | k, j); |
8b549648 VB |
972 | log_debug("smartfilter", "%s: protocols: %s", hardware->h_ifname, |
973 | buffer[0] ? buffer : "(none)"); | |
42b39485 VB |
974 | } |
975 | ||
566c635d VB |
976 | /* Hide unwanted ports depending on smart mode set by the user */ |
977 | static void | |
978 | lldpd_hide_all(struct lldpd *cfg) | |
979 | { | |
980 | struct lldpd_hardware *hardware; | |
981 | ||
8b549648 | 982 | if (!cfg->g_config.c_smart) return; |
6f8925be | 983 | log_debug("smartfilter", "apply smart filter results on all ports"); |
8b549648 | 984 | TAILQ_FOREACH (hardware, &cfg->g_hardware, h_entries) { |
8ec333bd | 985 | if (cfg->g_config.c_smart & SMART_INCOMING_FILTER) |
566c635d | 986 | lldpd_hide_ports(cfg, hardware, SMART_INCOMING); |
8ec333bd | 987 | if (cfg->g_config.c_smart & SMART_OUTGOING_FILTER) |
566c635d VB |
988 | lldpd_hide_ports(cfg, hardware, SMART_OUTGOING); |
989 | } | |
990 | } | |
991 | ||
1e33fa1d VB |
992 | /* If PD device and PSE allocated power, echo back this change. If we have |
993 | * several LLDP neighbors, we use the latest updated. */ | |
994 | static void | |
995 | lldpd_dot3_power_pd_pse(struct lldpd_hardware *hardware) | |
996 | { | |
997 | #ifdef ENABLE_DOT3 | |
998 | struct lldpd_port *port, *selected_port = NULL; | |
999 | /* Are we a PD device? */ | |
8b549648 VB |
1000 | if (hardware->h_lport.p_power.devicetype != LLDP_DOT3_POWER_PD) return; |
1001 | TAILQ_FOREACH (port, &hardware->h_rports, p_entries) { | |
1002 | if (port->p_hidden_in) continue; | |
5334d8c8 | 1003 | |
8b549648 VB |
1004 | if (port->p_protocol != LLDPD_MODE_LLDP && |
1005 | port->p_protocol != LLDPD_MODE_CDPV2) | |
1e33fa1d | 1006 | continue; |
5334d8c8 | 1007 | |
8b549648 | 1008 | if (port->p_power.devicetype != LLDP_DOT3_POWER_PSE) continue; |
1e33fa1d VB |
1009 | if (!selected_port || port->p_lastupdate > selected_port->p_lastupdate) |
1010 | selected_port = port; | |
1011 | } | |
8b549648 VB |
1012 | if (selected_port && |
1013 | selected_port->p_power.allocated != hardware->h_lport.p_power.allocated) { | |
1014 | log_info("receive", | |
1015 | "for %s, PSE told us allocated is now %d instead of %d", | |
1016 | hardware->h_ifname, selected_port->p_power.allocated, | |
1e33fa1d VB |
1017 | hardware->h_lport.p_power.allocated); |
1018 | hardware->h_lport.p_power.allocated = selected_port->p_power.allocated; | |
1019 | levent_schedule_pdu(hardware); | |
1020 | } | |
5334d8c8 | 1021 | |
8b549648 VB |
1022 | # ifdef ENABLE_CDP |
1023 | if (selected_port && | |
1024 | selected_port->p_cdp_power.management_id != | |
1025 | hardware->h_lport.p_cdp_power.management_id) { | |
1026 | hardware->h_lport.p_cdp_power.management_id = | |
1027 | selected_port->p_cdp_power.management_id; | |
5334d8c8 | 1028 | } |
8b549648 | 1029 | # endif |
5334d8c8 | 1030 | |
1e33fa1d VB |
1031 | #endif |
1032 | } | |
1033 | ||
d6e889b6 VB |
1034 | void |
1035 | lldpd_recv(struct lldpd *cfg, struct lldpd_hardware *hardware, int fd) | |
43c02e7b | 1036 | { |
d6e889b6 VB |
1037 | char *buffer = NULL; |
1038 | int n; | |
8b549648 | 1039 | log_debug("receive", "receive a frame on %s", hardware->h_ifname); |
d6e889b6 | 1040 | if ((buffer = (char *)malloc(hardware->h_mtu)) == NULL) { |
6f8925be | 1041 | log_warn("receive", "failed to alloc reception buffer"); |
d6e889b6 VB |
1042 | return; |
1043 | } | |
8b549648 VB |
1044 | if ((n = hardware->h_ops->recv(cfg, hardware, fd, buffer, hardware->h_mtu)) == |
1045 | -1) { | |
3e2e693c | 1046 | log_debug("receive", "discard frame received on %s", |
6f8925be | 1047 | hardware->h_ifname); |
d6e889b6 VB |
1048 | free(buffer); |
1049 | return; | |
1050 | } | |
e7331ce9 VB |
1051 | if (hardware->h_lport.p_disable_rx) { |
1052 | log_debug("receive", "RX disabled, ignore the frame on %s", | |
1053 | hardware->h_ifname); | |
1054 | free(buffer); | |
1055 | return; | |
1056 | } | |
e4ff3ed5 VB |
1057 | if (cfg->g_config.c_paused) { |
1058 | log_debug("receive", "paused, ignore the frame on %s", | |
8b549648 | 1059 | hardware->h_ifname); |
e4ff3ed5 VB |
1060 | free(buffer); |
1061 | return; | |
1062 | } | |
d6e889b6 | 1063 | hardware->h_rx_cnt++; |
8b549648 | 1064 | log_debug("receive", "decode received frame on %s", hardware->h_ifname); |
bdfe4193 | 1065 | TRACE(LLDPD_FRAME_RECEIVED(hardware->h_ifname, buffer, (size_t)n)); |
d6e889b6 VB |
1066 | lldpd_decode(cfg, buffer, n, hardware); |
1067 | lldpd_hide_all(cfg); /* Immediatly hide */ | |
1e33fa1d | 1068 | lldpd_dot3_power_pd_pse(hardware); |
66879d46 | 1069 | lldpd_count_neighbors(cfg); |
d6e889b6 | 1070 | free(buffer); |
43c02e7b VB |
1071 | } |
1072 | ||
e770b720 VB |
1073 | static void |
1074 | lldpd_send_shutdown(struct lldpd_hardware *hardware) | |
1075 | { | |
1076 | struct lldpd *cfg = hardware->h_cfg; | |
1077 | if (cfg->g_config.c_receiveonly || cfg->g_config.c_paused) return; | |
e7331ce9 | 1078 | if (hardware->h_lport.p_disable_tx) return; |
8b549648 | 1079 | if ((hardware->h_flags & IFF_RUNNING) == 0) return; |
e770b720 VB |
1080 | |
1081 | /* It's safe to call `lldp_send_shutdown()` because shutdown LLDPU will | |
1082 | * only be emitted if LLDP was sent on that port. */ | |
1083 | if (lldp_send_shutdown(hardware->h_cfg, hardware) != 0) | |
1084 | log_warnx("send", "unable to send shutdown LLDPDU on %s", | |
1085 | hardware->h_ifname); | |
1086 | } | |
1087 | ||
579bedd5 VB |
1088 | void |
1089 | lldpd_send(struct lldpd_hardware *hardware) | |
43c02e7b | 1090 | { |
579bedd5 | 1091 | struct lldpd *cfg = hardware->h_cfg; |
77507b69 | 1092 | struct lldpd_port *port; |
0d86e62f | 1093 | int i, sent; |
f7db0dd8 | 1094 | |
e4ff3ed5 | 1095 | if (cfg->g_config.c_receiveonly || cfg->g_config.c_paused) return; |
e7331ce9 | 1096 | if (hardware->h_lport.p_disable_tx) return; |
8b549648 | 1097 | if ((hardware->h_flags & IFF_RUNNING) == 0) return; |
6f8925be | 1098 | |
579bedd5 VB |
1099 | log_debug("send", "send PDU on %s", hardware->h_ifname); |
1100 | sent = 0; | |
8b549648 VB |
1101 | for (i = 0; cfg->g_protocols[i].mode != 0; i++) { |
1102 | if (!cfg->g_protocols[i].enabled) continue; | |
579bedd5 VB |
1103 | /* We send only if we have at least one remote system |
1104 | * speaking this protocol or if the protocol is forced */ | |
1105 | if (cfg->g_protocols[i].enabled > 1) { | |
1106 | cfg->g_protocols[i].send(cfg, hardware); | |
1107 | sent++; | |
43c02e7b | 1108 | continue; |
43c02e7b | 1109 | } |
8b549648 | 1110 | TAILQ_FOREACH (port, &hardware->h_rports, p_entries) { |
579bedd5 VB |
1111 | /* If this remote port is disabled, we don't |
1112 | * consider it */ | |
8b549648 VB |
1113 | if (port->p_hidden_out) continue; |
1114 | if (port->p_protocol == cfg->g_protocols[i].mode) { | |
bdfe4193 | 1115 | TRACE(LLDPD_FRAME_SEND(hardware->h_ifname, |
8b549648 | 1116 | cfg->g_protocols[i].name)); |
579bedd5 | 1117 | log_debug("send", "send PDU on %s with protocol %s", |
8b549648 VB |
1118 | hardware->h_ifname, cfg->g_protocols[i].name); |
1119 | cfg->g_protocols[i].send(cfg, hardware); | |
a54f6012 | 1120 | hardware->h_lport.p_protocol = cfg->g_protocols[i].mode; |
579bedd5 | 1121 | sent++; |
46baf627 VB |
1122 | break; |
1123 | } | |
46baf627 | 1124 | } |
43c02e7b | 1125 | } |
579bedd5 VB |
1126 | |
1127 | if (!sent) { | |
1128 | /* Nothing was sent for this port, let's speak the first | |
1129 | * available protocol. */ | |
1130 | for (i = 0; cfg->g_protocols[i].mode != 0; i++) { | |
1131 | if (!cfg->g_protocols[i].enabled) continue; | |
bdfe4193 | 1132 | TRACE(LLDPD_FRAME_SEND(hardware->h_ifname, |
8b549648 | 1133 | cfg->g_protocols[i].name)); |
579bedd5 VB |
1134 | log_debug("send", "fallback to protocol %s for %s", |
1135 | cfg->g_protocols[i].name, hardware->h_ifname); | |
8b549648 | 1136 | cfg->g_protocols[i].send(cfg, hardware); |
579bedd5 VB |
1137 | break; |
1138 | } | |
1139 | if (cfg->g_protocols[i].mode == 0) | |
1140 | log_warnx("send", "no protocol enabled, dunno what to send"); | |
1141 | } | |
43c02e7b VB |
1142 | } |
1143 | ||
89840df0 | 1144 | #ifdef ENABLE_LLDPMED |
8888d191 | 1145 | static void |
8ef9c766 | 1146 | lldpd_med(struct lldpd *cfg, struct utsname *un) |
89840df0 | 1147 | { |
55606d4b | 1148 | static short int once = 0; |
8ef9c766 HG |
1149 | if (!once && cfg) { |
1150 | LOCAL_CHASSIS(cfg)->c_med_hw = dmi_hw(); | |
1151 | LOCAL_CHASSIS(cfg)->c_med_fw = dmi_fw(); | |
1152 | LOCAL_CHASSIS(cfg)->c_med_sn = dmi_sn(); | |
1153 | LOCAL_CHASSIS(cfg)->c_med_manuf = dmi_manuf(); | |
1154 | LOCAL_CHASSIS(cfg)->c_med_model = dmi_model(); | |
1155 | LOCAL_CHASSIS(cfg)->c_med_asset = dmi_asset(); | |
1156 | if (un) { | |
1157 | if (LOCAL_CHASSIS(cfg)->c_med_sw) | |
1158 | free(LOCAL_CHASSIS(cfg)->c_med_sw); | |
1159 | ||
1160 | if (cfg->g_config.c_advertise_version) | |
1161 | LOCAL_CHASSIS(cfg)->c_med_sw = strdup(un->release); | |
1162 | else | |
1163 | LOCAL_CHASSIS(cfg)->c_med_sw = strdup("Unknown"); | |
1164 | } | |
55606d4b VB |
1165 | once = 1; |
1166 | } | |
89840df0 VB |
1167 | } |
1168 | #endif | |
1169 | ||
e66b7f34 | 1170 | static int |
c3e340b6 | 1171 | lldpd_routing_enabled(struct lldpd *cfg) |
e66b7f34 | 1172 | { |
c3e340b6 | 1173 | int routing; |
a2b113ef | 1174 | |
8b549648 | 1175 | if ((LOCAL_CHASSIS(cfg)->c_cap_available & LLDP_CAP_ROUTER) == 0) return 0; |
a2b113ef | 1176 | |
c3e340b6 VB |
1177 | if ((routing = interfaces_routing_enabled(cfg)) == -1) { |
1178 | log_debug("localchassis", "unable to check if routing is enabled"); | |
1179 | return 0; | |
1180 | } | |
1181 | return routing; | |
e66b7f34 VB |
1182 | } |
1183 | ||
e6f64ed9 | 1184 | void |
6e75df87 | 1185 | lldpd_update_localchassis(struct lldpd *cfg) |
43c02e7b | 1186 | { |
6e75df87 VB |
1187 | struct utsname un; |
1188 | char *hp; | |
43c02e7b | 1189 | |
6f8925be | 1190 | log_debug("localchassis", "update information for local chassis"); |
aa015c26 | 1191 | assert(LOCAL_CHASSIS(cfg) != NULL); |
6f8925be | 1192 | |
43c02e7b | 1193 | /* Set system name and description */ |
8b549648 | 1194 | if (uname(&un) < 0) fatal("localchassis", "failed to get system information"); |
ce347d29 | 1195 | if (cfg->g_config.c_hostname) { |
8b549648 VB |
1196 | log_debug("localchassis", "use overridden system name `%s`", |
1197 | cfg->g_config.c_hostname); | |
ce347d29 JJ |
1198 | hp = cfg->g_config.c_hostname; |
1199 | } else { | |
1fa7d39f | 1200 | if ((hp = priv_gethostname()) == NULL) |
ce347d29 JJ |
1201 | fatal("localchassis", "failed to get system name"); |
1202 | } | |
77507b69 VB |
1203 | free(LOCAL_CHASSIS(cfg)->c_name); |
1204 | free(LOCAL_CHASSIS(cfg)->c_descr); | |
1205 | if ((LOCAL_CHASSIS(cfg)->c_name = strdup(hp)) == NULL) | |
6f8925be | 1206 | fatal("localchassis", NULL); |
8b549648 VB |
1207 | if (cfg->g_config.c_description) { |
1208 | log_debug("localchassis", "use overridden description `%s`", | |
1209 | cfg->g_config.c_description); | |
1210 | if (asprintf(&LOCAL_CHASSIS(cfg)->c_descr, "%s", | |
8ec333bd | 1211 | cfg->g_config.c_description) == -1) |
6f8925be | 1212 | fatal("localchassis", "failed to set full system description"); |
8b549648 VB |
1213 | } else { |
1214 | if (cfg->g_config.c_advertise_version) { | |
6f8925be | 1215 | log_debug("localchassis", "advertise system version"); |
8b549648 VB |
1216 | if (asprintf(&LOCAL_CHASSIS(cfg)->c_descr, "%s %s %s %s %s", |
1217 | cfg->g_lsb_release ? cfg->g_lsb_release : "", | |
1218 | un.sysname, un.release, un.version, un.machine) == -1) | |
1219 | fatal("localchassis", | |
1220 | "failed to set full system description"); | |
1221 | } else { | |
6f8925be | 1222 | log_debug("localchassis", "do not advertise system version"); |
8b549648 VB |
1223 | if (asprintf(&LOCAL_CHASSIS(cfg)->c_descr, "%s", |
1224 | cfg->g_lsb_release ? cfg->g_lsb_release : un.sysname) == | |
1225 | -1) | |
1226 | fatal("localchassis", | |
1227 | "failed to set minimal system description"); | |
1228 | } | |
1229 | } | |
96beef68 VB |
1230 | if (cfg->g_config.c_platform == NULL) |
1231 | cfg->g_config.c_platform = strdup(un.sysname); | |
43c02e7b | 1232 | |
4c8e6e37 ISN |
1233 | if (!cfg->g_config.c_cap_override) { |
1234 | /* Check routing */ | |
1235 | if (lldpd_routing_enabled(cfg)) { | |
8b549648 VB |
1236 | log_debug("localchassis", |
1237 | "routing is enabled, enable router capability"); | |
4c8e6e37 ISN |
1238 | LOCAL_CHASSIS(cfg)->c_cap_enabled |= LLDP_CAP_ROUTER; |
1239 | } else | |
1240 | LOCAL_CHASSIS(cfg)->c_cap_enabled &= ~LLDP_CAP_ROUTER; | |
242845c7 | 1241 | |
89840df0 | 1242 | #ifdef ENABLE_LLDPMED |
4c8e6e37 ISN |
1243 | if (LOCAL_CHASSIS(cfg)->c_cap_available & LLDP_CAP_TELEPHONE) |
1244 | LOCAL_CHASSIS(cfg)->c_cap_enabled |= LLDP_CAP_TELEPHONE; | |
1245 | lldpd_med(cfg, &un); | |
89840df0 | 1246 | #endif |
4c8e6e37 ISN |
1247 | if ((LOCAL_CHASSIS(cfg)->c_cap_available & LLDP_CAP_STATION) && |
1248 | (LOCAL_CHASSIS(cfg)->c_cap_enabled == 0)) | |
1249 | LOCAL_CHASSIS(cfg)->c_cap_enabled = LLDP_CAP_STATION; | |
1250 | else if (LOCAL_CHASSIS(cfg)->c_cap_enabled != LLDP_CAP_STATION) | |
1251 | LOCAL_CHASSIS(cfg)->c_cap_enabled &= ~LLDP_CAP_STATION; | |
1252 | } | |
43c02e7b | 1253 | |
b4ac8083 VB |
1254 | /* Set chassis ID if needed. This is only done if chassis ID |
1255 | has not been set previously (with the MAC address of an | |
1256 | interface for example) | |
1257 | */ | |
8481f490 VB |
1258 | if (cfg->g_config.c_cid_string != NULL) { |
1259 | log_debug("localchassis", "use specified chassis ID string"); | |
1260 | free(LOCAL_CHASSIS(cfg)->c_id); | |
1261 | if (!(LOCAL_CHASSIS(cfg)->c_id = strdup(cfg->g_config.c_cid_string))) | |
1262 | fatal("localchassis", NULL); | |
1263 | LOCAL_CHASSIS(cfg)->c_id_len = strlen(cfg->g_config.c_cid_string); | |
1264 | LOCAL_CHASSIS(cfg)->c_id_subtype = LLDP_CHASSISID_SUBTYPE_LOCAL; | |
1265 | } | |
b4ac8083 | 1266 | if (LOCAL_CHASSIS(cfg)->c_id == NULL) { |
8b549648 VB |
1267 | log_debug("localchassis", |
1268 | "no chassis ID is currently set, use chassis name"); | |
8481f490 | 1269 | if (!(LOCAL_CHASSIS(cfg)->c_id = strdup(LOCAL_CHASSIS(cfg)->c_name))) |
6f8925be | 1270 | fatal("localchassis", NULL); |
8481f490 VB |
1271 | LOCAL_CHASSIS(cfg)->c_id_len = strlen(LOCAL_CHASSIS(cfg)->c_name); |
1272 | LOCAL_CHASSIS(cfg)->c_id_subtype = LLDP_CHASSISID_SUBTYPE_LOCAL; | |
6e75df87 VB |
1273 | } |
1274 | } | |
1275 | ||
0484f180 | 1276 | void |
6e75df87 VB |
1277 | lldpd_update_localports(struct lldpd *cfg) |
1278 | { | |
6e75df87 | 1279 | struct lldpd_hardware *hardware; |
6e75df87 | 1280 | |
9e5d99d4 | 1281 | log_debug("localchassis", "update information for local ports"); |
6f8925be | 1282 | |
6e75df87 VB |
1283 | /* h_flags is set to 0 for each port. If the port is updated, h_flags |
1284 | * will be set to a non-zero value. This will allow us to clean up any | |
1285 | * non up-to-date port */ | |
8b549648 VB |
1286 | TAILQ_FOREACH (hardware, &cfg->g_hardware, h_entries) |
1287 | hardware->h_flags = 0; | |
43c02e7b | 1288 | |
bdfe4193 | 1289 | TRACE(LLDPD_INTERFACES_UPDATE()); |
e12c2365 | 1290 | interfaces_update(cfg); |
bfdc2a8c | 1291 | lldpd_cleanup(cfg); |
579bedd5 | 1292 | lldpd_reset_timer(cfg); |
6e75df87 | 1293 | } |
43c02e7b | 1294 | |
d6e889b6 | 1295 | void |
6e75df87 VB |
1296 | lldpd_loop(struct lldpd *cfg) |
1297 | { | |
1298 | /* Main loop. | |
6e75df87 | 1299 | 1. Update local ports information |
579bedd5 | 1300 | 2. Update local chassis information |
6e75df87 | 1301 | */ |
6f8925be | 1302 | log_debug("loop", "start new loop"); |
8b549648 | 1303 | if (!cfg->g_config.c_cap_override) LOCAL_CHASSIS(cfg)->c_cap_enabled = 0; |
579bedd5 VB |
1304 | /* Information for local ports is triggered even when it is possible to |
1305 | * update them on some other event because we want to refresh them if we | |
1306 | * missed something. */ | |
1307 | log_debug("loop", "update information for local ports"); | |
1308 | lldpd_update_localports(cfg); | |
6f8925be | 1309 | log_debug("loop", "update information for local chassis"); |
6e75df87 | 1310 | lldpd_update_localchassis(cfg); |
66879d46 | 1311 | lldpd_count_neighbors(cfg); |
43c02e7b VB |
1312 | } |
1313 | ||
8888d191 | 1314 | static void |
d6e889b6 | 1315 | lldpd_exit(struct lldpd *cfg) |
43c02e7b | 1316 | { |
a1c9d4be | 1317 | char *lockname = NULL; |
6e75df87 | 1318 | struct lldpd_hardware *hardware, *hardware_next; |
9e5d99d4 | 1319 | log_debug("main", "exit lldpd"); |
e770b720 | 1320 | |
8b549648 | 1321 | TAILQ_FOREACH (hardware, &cfg->g_hardware, h_entries) |
e770b720 VB |
1322 | lldpd_send_shutdown(hardware); |
1323 | ||
a1c9d4be VB |
1324 | if (asprintf(&lockname, "%s.lock", cfg->g_ctlname) != -1) { |
1325 | priv_ctl_cleanup(lockname); | |
1326 | free(lockname); | |
1327 | } | |
d6e889b6 | 1328 | close(cfg->g_ctl); |
0262adbb | 1329 | priv_ctl_cleanup(cfg->g_ctlname); |
9e5d99d4 | 1330 | log_debug("main", "cleanup hardware information"); |
d6e889b6 | 1331 | for (hardware = TAILQ_FIRST(&cfg->g_hardware); hardware != NULL; |
6e75df87 VB |
1332 | hardware = hardware_next) { |
1333 | hardware_next = TAILQ_NEXT(hardware, h_entries); | |
9e5d99d4 | 1334 | log_debug("main", "cleanup interface %s", hardware->h_ifname); |
ef3707da | 1335 | lldpd_remote_cleanup(hardware, NULL, 1); |
d6e889b6 | 1336 | lldpd_hardware_cleanup(cfg, hardware); |
43c02e7b | 1337 | } |
24cb9684 | 1338 | interfaces_cleanup(cfg); |
9c93725f | 1339 | lldpd_port_cleanup(cfg->g_default_local_port, 1); |
24cb9684 | 1340 | lldpd_all_chassis_cleanup(cfg); |
9c93725f | 1341 | free(cfg->g_default_local_port); |
13181ede | 1342 | free(cfg->g_config.c_platform); |
f144d837 | 1343 | levent_shutdown(cfg); |
43c02e7b VB |
1344 | } |
1345 | ||
51534ef3 VB |
1346 | /** |
1347 | * Run lldpcli to configure lldpd. | |
1348 | * | |
1349 | * @return PID of running lldpcli or -1 if error. | |
1350 | */ | |
1351 | static pid_t | |
8b549648 VB |
1352 | lldpd_configure(int use_syslog, int debug, const char *path, const char *ctlname, |
1353 | const char *config_path) | |
51534ef3 | 1354 | { |
45bf0bd0 | 1355 | pid_t lldpcli = vfork(); |
51534ef3 VB |
1356 | int devnull; |
1357 | ||
9856f279 VB |
1358 | char sdebug[debug + 4]; |
1359 | if (use_syslog) | |
1360 | strlcpy(sdebug, "-s", 3); | |
1361 | else { | |
1362 | /* debug = 0 -> -sd */ | |
1363 | /* debug = 1 -> -sdd */ | |
1364 | /* debug = 2 -> -sddd */ | |
1365 | memset(sdebug, 'd', sizeof(sdebug)); | |
1366 | sdebug[debug + 3] = '\0'; | |
8b549648 VB |
1367 | sdebug[0] = '-'; |
1368 | sdebug[1] = 's'; | |
9856f279 | 1369 | } |
45bf0bd0 VB |
1370 | log_debug("main", "invoke %s %s", path, sdebug); |
1371 | ||
51534ef3 VB |
1372 | switch (lldpcli) { |
1373 | case -1: | |
1374 | log_warn("main", "unable to fork"); | |
1375 | return -1; | |
1376 | case 0: | |
1377 | /* Child, exec lldpcli */ | |
1378 | if ((devnull = open("/dev/null", O_RDWR, 0)) != -1) { | |
8b549648 VB |
1379 | dup2(devnull, STDIN_FILENO); |
1380 | dup2(devnull, STDOUT_FILENO); | |
51534ef3 VB |
1381 | if (devnull > 2) close(devnull); |
1382 | ||
94f6ce25 | 1383 | if (config_path) { |
8b549648 VB |
1384 | execl(path, "lldpcli", sdebug, "-u", ctlname, "-C", |
1385 | config_path, "resume", (char *)NULL); | |
94f6ce25 | 1386 | } else { |
8b549648 VB |
1387 | execl(path, "lldpcli", sdebug, "-u", ctlname, "-C", |
1388 | SYSCONFDIR "/lldpd.conf", "-C", | |
1389 | SYSCONFDIR "/lldpd.d", "resume", (char *)NULL); | |
94f6ce25 TT |
1390 | } |
1391 | ||
45bf0bd0 | 1392 | log_warn("main", "unable to execute %s", path); |
8b549648 VB |
1393 | log_warnx("main", |
1394 | "configuration is incomplete, lldpd needs to be unpaused"); | |
51534ef3 | 1395 | } |
45bf0bd0 | 1396 | _exit(127); |
51534ef3 VB |
1397 | break; |
1398 | default: | |
1399 | /* Father, don't do anything stupid */ | |
1400 | return lldpcli; | |
1401 | } | |
1402 | /* Should not be here */ | |
1403 | return -1; | |
1404 | } | |
1405 | ||
8b549648 VB |
1406 | struct intint { |
1407 | int a; | |
1408 | int b; | |
1409 | }; | |
1410 | static const struct intint filters[] = { { 0, 0 }, | |
1411 | { 1, | |
1412 | SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | SMART_OUTGOING_FILTER | | |
1413 | SMART_OUTGOING_ONE_PROTO }, | |
1414 | { 2, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO }, | |
1415 | { 3, SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
1416 | { 4, SMART_INCOMING_FILTER | SMART_OUTGOING_FILTER }, | |
1417 | { 5, SMART_INCOMING_FILTER }, { 6, SMART_OUTGOING_FILTER }, | |
1418 | { 7, | |
1419 | SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | | |
1420 | SMART_INCOMING_ONE_NEIGH | SMART_OUTGOING_FILTER | | |
1421 | SMART_OUTGOING_ONE_PROTO }, | |
1422 | { 8, | |
1423 | SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | | |
1424 | SMART_INCOMING_ONE_NEIGH }, | |
1425 | { 9, | |
1426 | SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH | SMART_OUTGOING_FILTER | | |
1427 | SMART_OUTGOING_ONE_PROTO }, | |
8482abe9 VB |
1428 | { 10, SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, |
1429 | { 11, SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH }, | |
8b549648 VB |
1430 | { 12, |
1431 | SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH | SMART_OUTGOING_FILTER | | |
1432 | SMART_OUTGOING_ONE_NEIGH }, | |
1433 | { 13, | |
1434 | SMART_INCOMING_FILTER | SMART_INCOMING_ONE_NEIGH | SMART_OUTGOING_FILTER }, | |
1435 | { 14, | |
1436 | SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | SMART_OUTGOING_FILTER | | |
1437 | SMART_OUTGOING_ONE_NEIGH }, | |
1438 | { 15, | |
1439 | SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | SMART_OUTGOING_FILTER }, | |
1440 | { 16, | |
1441 | SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | | |
1442 | SMART_INCOMING_ONE_NEIGH | SMART_OUTGOING_FILTER | | |
1443 | SMART_OUTGOING_ONE_NEIGH }, | |
1444 | { 17, | |
1445 | SMART_INCOMING_FILTER | SMART_INCOMING_ONE_PROTO | | |
1446 | SMART_INCOMING_ONE_NEIGH | SMART_OUTGOING_FILTER }, | |
1447 | { 18, | |
1448 | SMART_INCOMING_FILTER | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_NEIGH }, | |
1449 | { 19, | |
1450 | SMART_INCOMING_FILTER | SMART_OUTGOING_FILTER | SMART_OUTGOING_ONE_PROTO }, | |
1451 | { -1, 0 } }; | |
8482abe9 | 1452 | |
e66b7f34 | 1453 | #ifndef HOST_OS_OSX |
322aafc9 VB |
1454 | /** |
1455 | * Tell if we have been started by systemd. | |
1456 | */ | |
1457 | static int | |
1458 | lldpd_started_by_systemd() | |
1459 | { | |
8b549648 | 1460 | # ifdef HOST_OS_LINUX |
322aafc9 | 1461 | int fd = -1; |
0800ce57 VB |
1462 | int ret = 0; |
1463 | size_t path_length; | |
1464 | struct sockaddr_un sun = { | |
1465 | .sun_family = AF_UNIX, | |
1466 | }; | |
322aafc9 | 1467 | const char *notifysocket = getenv("NOTIFY_SOCKET"); |
0800ce57 VB |
1468 | if (!notifysocket || !strchr("@/", notifysocket[0]) || |
1469 | (path_length = strlen(notifysocket)) < 2) | |
1470 | goto done; | |
1471 | ||
1472 | if (path_length >= sizeof(sun.sun_path)) { | |
1473 | log_warnx("main", "systemd notification socket is too long"); | |
1474 | goto done; | |
1475 | } | |
1476 | strlcpy(sun.sun_path, notifysocket, sizeof(sun.sun_path)); | |
1477 | if (notifysocket[0] == '@') sun.sun_path[0] = 0; | |
322aafc9 VB |
1478 | |
1479 | log_debug("main", "running with systemd, don't fork but signal ready"); | |
ceb37922 | 1480 | if ((fd = socket(AF_UNIX, SOCK_DGRAM, 0)) < 0) { |
322aafc9 VB |
1481 | log_warn("main", "unable to open systemd notification socket %s", |
1482 | notifysocket); | |
0800ce57 VB |
1483 | goto done; |
1484 | } | |
1485 | if (connect(fd, &sun, sizeof(sun)) != 0) { | |
1486 | log_warn("main", "unable to connect to systemd notification socket"); | |
1487 | goto done; | |
322aafc9 | 1488 | } |
f540397c | 1489 | char ready[] = "READY=1"; |
0800ce57 VB |
1490 | ssize_t written = write(fd, ready, sizeof ready - 1); |
1491 | if (written != (ssize_t)sizeof ready - 1) { | |
322aafc9 | 1492 | log_warn("main", "unable to send notification to systemd"); |
0800ce57 | 1493 | goto done; |
322aafc9 | 1494 | } |
0800ce57 VB |
1495 | unsetenv("NOTIFY_SOCKET"); |
1496 | ret = 1; | |
1497 | done: | |
1498 | if (fd >= 0) close(fd); | |
1499 | return ret; | |
8b549648 | 1500 | # else |
322aafc9 | 1501 | return 0; |
8b549648 | 1502 | # endif |
2591639f | 1503 | } |
e66b7f34 | 1504 | #endif |
2591639f | 1505 | |
2472bfda VB |
1506 | #ifdef HOST_OS_LINUX |
1507 | static void | |
1508 | version_convert(const char *sversion, unsigned iversion[], size_t n) | |
1509 | { | |
1510 | const char *p = sversion; | |
1511 | char *end; | |
1512 | for (size_t i = 0; i < n; i++) { | |
1513 | iversion[i] = strtol(p, &end, 10); | |
1514 | if (*end != '.') break; | |
1515 | p = end + 1; | |
1516 | } | |
1517 | } | |
1518 | ||
1519 | static void | |
1520 | version_check(void) | |
1521 | { | |
1522 | struct utsname uts; | |
1523 | if (uname(&uts) == -1) return; | |
1524 | unsigned version_min[3] = {}; | |
1525 | unsigned version_cur[3] = {}; | |
1526 | version_convert(uts.release, version_cur, 3); | |
1527 | version_convert(MIN_LINUX_KERNEL_VERSION, version_min, 3); | |
1528 | if (version_min[0] > version_cur[0] || | |
1529 | (version_min[0] == version_cur[0] && version_min[1] > version_cur[1]) || | |
05a708dc VB |
1530 | (version_min[0] == version_cur[0] && version_min[1] == version_cur[1] && |
1531 | version_min[2] > version_cur[2])) { | |
2472bfda VB |
1532 | log_warnx("lldpd", "minimal kernel version required is %s, got %s", |
1533 | MIN_LINUX_KERNEL_VERSION, uts.release); | |
8b549648 VB |
1534 | log_warnx("lldpd", |
1535 | "lldpd may be unable to detect bonds and bridges correctly"); | |
1536 | # ifndef ENABLE_OLDIES | |
2472bfda | 1537 | log_warnx("lldpd", "consider recompiling with --enable-oldies option"); |
8b549648 | 1538 | # endif |
2472bfda VB |
1539 | } |
1540 | } | |
1541 | #else | |
8b549648 VB |
1542 | static void |
1543 | version_check(void) | |
1544 | { | |
1545 | } | |
2472bfda VB |
1546 | #endif |
1547 | ||
43c02e7b | 1548 | int |
1e0d651f | 1549 | lldpd_main(int argc, char *argv[], char *envp[]) |
43c02e7b VB |
1550 | { |
1551 | struct lldpd *cfg; | |
77507b69 | 1552 | struct lldpd_chassis *lchassis; |
9856f279 | 1553 | int ch, debug = 0, use_syslog = 1, daemonize = 1; |
8a378b16 | 1554 | const char *errstr; |
e809a587 VB |
1555 | #ifdef USE_SNMP |
1556 | int snmp = 0; | |
8b549648 | 1557 | const char *agentx = NULL; /* AgentX socket */ |
e809a587 | 1558 | #endif |
1c1c519f | 1559 | const char *ctlname = NULL; |
d4e4c804 | 1560 | char *mgmtp = NULL; |
8481f490 | 1561 | char *cidp = NULL; |
ba85f9f4 | 1562 | char *interfaces = NULL; |
984bbcbc VB |
1563 | /* We do not want more options here. Please add them in lldpcli instead |
1564 | * unless there is a very good reason. Most command-line options will | |
1565 | * get deprecated at some point. */ | |
8b549648 VB |
1566 | char *popt, |
1567 | opts[] = "H:vhkrdD:p:xX:m:u:4:6:I:C:p:M:P:S:iL:O:@ "; | |
de1b1b3a | 1568 | int i, found, advertise_version = 1; |
89840df0 | 1569 | #ifdef ENABLE_LLDPMED |
e809a587 | 1570 | int lldpmed = 0, noinventory = 0; |
d6d42d56 | 1571 | int enable_fast_start = 1; |
89840df0 | 1572 | #endif |
d4afb919 VB |
1573 | char *descr_override = NULL; |
1574 | char *platform_override = NULL; | |
c036b15d | 1575 | char *lsb_release = NULL; |
51534ef3 | 1576 | const char *lldpcli = LLDPCLI_PATH; |
a3c9f9ee | 1577 | #ifndef HOST_OS_OSX |
7b6cbfe2 | 1578 | const char *pidfile = LLDPD_PID_FILE; |
a3c9f9ee | 1579 | #endif |
8482abe9 | 1580 | int smart = 15; |
efa6a7a3 | 1581 | int receiveonly = 0, version = 0; |
2e91d1a1 | 1582 | int ctl; |
94f6ce25 | 1583 | const char *config_file = NULL; |
2e91d1a1 | 1584 | |
28bf4022 | 1585 | #ifdef ENABLE_PRIVSEP |
2e91d1a1 VB |
1586 | /* Non privileged user */ |
1587 | struct passwd *user; | |
1588 | struct group *group; | |
1589 | uid_t uid; | |
1590 | gid_t gid; | |
28bf4022 | 1591 | #endif |
43c02e7b VB |
1592 | |
1593 | saved_argv = argv; | |
1594 | ||
1e0d651f VB |
1595 | #if HAVE_SETPROCTITLE_INIT |
1596 | setproctitle_init(argc, argv, envp); | |
1597 | #endif | |
1598 | ||
43c02e7b VB |
1599 | /* |
1600 | * Get and parse command line options | |
1601 | */ | |
d68f1b81 | 1602 | if ((popt = strchr(opts, '@')) != NULL) { |
8b549648 | 1603 | for (i = 0; protos[i].mode != 0 && *popt != '\0'; i++) |
d68f1b81 VB |
1604 | *(popt++) = protos[i].arg; |
1605 | *popt = '\0'; | |
1606 | } | |
43c02e7b VB |
1607 | while ((ch = getopt(argc, argv, opts)) != -1) { |
1608 | switch (ch) { | |
b162b740 VB |
1609 | case 'h': |
1610 | usage(); | |
1611 | break; | |
96e49a40 | 1612 | case 'v': |
efa6a7a3 | 1613 | version++; |
96e49a40 | 1614 | break; |
43c02e7b | 1615 | case 'd': |
9856f279 VB |
1616 | if (daemonize) |
1617 | daemonize = 0; | |
1618 | else if (use_syslog) | |
1619 | use_syslog = 0; | |
1620 | else | |
1621 | debug++; | |
43c02e7b | 1622 | break; |
9e5d99d4 VB |
1623 | case 'D': |
1624 | log_accept(optarg); | |
1625 | break; | |
a3c9f9ee | 1626 | #ifndef HOST_OS_OSX |
7b6cbfe2 VB |
1627 | case 'p': |
1628 | pidfile = optarg; | |
1629 | break; | |
a3c9f9ee | 1630 | #endif |
537a8043 VB |
1631 | case 'r': |
1632 | receiveonly = 1; | |
1633 | break; | |
d4e4c804 | 1634 | case 'm': |
9b11faad VB |
1635 | if (mgmtp) { |
1636 | fprintf(stderr, "-m can only be used once\n"); | |
1637 | usage(); | |
1638 | } | |
abc04205 | 1639 | mgmtp = strdup(optarg); |
43c02e7b | 1640 | break; |
0262adbb | 1641 | case 'u': |
9b11faad VB |
1642 | if (ctlname) { |
1643 | fprintf(stderr, "-u can only be used once\n"); | |
1644 | usage(); | |
1645 | } | |
0262adbb ZM |
1646 | ctlname = optarg; |
1647 | break; | |
ba85f9f4 | 1648 | case 'I': |
9b11faad VB |
1649 | if (interfaces) { |
1650 | fprintf(stderr, "-I can only be used once\n"); | |
1651 | usage(); | |
1652 | } | |
abc04205 | 1653 | interfaces = strdup(optarg); |
ba85f9f4 | 1654 | break; |
5339e725 | 1655 | case 'C': |
9b11faad VB |
1656 | if (cidp) { |
1657 | fprintf(stderr, "-C can only be used once\n"); | |
1658 | usage(); | |
1659 | } | |
abc04205 | 1660 | cidp = strdup(optarg); |
5339e725 | 1661 | break; |
51534ef3 | 1662 | case 'L': |
8b549648 VB |
1663 | if (strlen(optarg)) |
1664 | lldpcli = optarg; | |
1665 | else | |
1666 | lldpcli = NULL; | |
037d4c8e | 1667 | break; |
de1b1b3a VB |
1668 | case 'k': |
1669 | advertise_version = 0; | |
1670 | break; | |
e809a587 | 1671 | #ifdef ENABLE_LLDPMED |
115ff55c | 1672 | case 'M': |
8a378b16 VB |
1673 | lldpmed = strtonum(optarg, 1, 4, &errstr); |
1674 | if (errstr) { | |
8b549648 VB |
1675 | fprintf(stderr, |
1676 | "-M requires an argument between 1 and 4\n"); | |
89840df0 | 1677 | usage(); |
e809a587 | 1678 | } |
89840df0 | 1679 | break; |
e809a587 | 1680 | case 'i': |
e809a587 | 1681 | noinventory = 1; |
115ff55c | 1682 | break; |
e809a587 | 1683 | #else |
115ff55c VB |
1684 | case 'M': |
1685 | case 'i': | |
e809a587 VB |
1686 | fprintf(stderr, "LLDP-MED support is not built-in\n"); |
1687 | usage(); | |
e809a587 | 1688 | break; |
115ff55c | 1689 | #endif |
e809a587 | 1690 | #ifdef USE_SNMP |
bbea66e1 V |
1691 | case 'x': |
1692 | snmp = 1; | |
1693 | break; | |
1694 | case 'X': | |
9b11faad VB |
1695 | if (agentx) { |
1696 | fprintf(stderr, "-X can only be used once\n"); | |
1697 | usage(); | |
1698 | } | |
43c02e7b | 1699 | snmp = 1; |
bbea66e1 V |
1700 | agentx = optarg; |
1701 | break; | |
e809a587 | 1702 | #else |
bbea66e1 V |
1703 | case 'x': |
1704 | case 'X': | |
e809a587 VB |
1705 | fprintf(stderr, "SNMP support is not built-in\n"); |
1706 | usage(); | |
1707 | #endif | |
43c02e7b | 1708 | break; |
8b549648 | 1709 | case 'S': |
9b11faad VB |
1710 | if (descr_override) { |
1711 | fprintf(stderr, "-S can only be used once\n"); | |
1712 | usage(); | |
1713 | } | |
8b549648 VB |
1714 | descr_override = strdup(optarg); |
1715 | break; | |
d4afb919 | 1716 | case 'P': |
9b11faad VB |
1717 | if (platform_override) { |
1718 | fprintf(stderr, "-P can only be used once\n"); | |
1719 | usage(); | |
1720 | } | |
d4afb919 VB |
1721 | platform_override = strdup(optarg); |
1722 | break; | |
42b39485 | 1723 | case 'H': |
8b549648 VB |
1724 | smart = strtonum(optarg, 0, |
1725 | sizeof(filters) / sizeof(filters[0]), &errstr); | |
8a378b16 | 1726 | if (errstr) { |
8b549648 VB |
1727 | fprintf(stderr, |
1728 | "-H requires an int between 0 and %zu\n", | |
1729 | sizeof(filters) / sizeof(filters[0])); | |
8a378b16 VB |
1730 | usage(); |
1731 | } | |
42b39485 | 1732 | break; |
94f6ce25 TT |
1733 | case 'O': |
1734 | if (config_file) { | |
1735 | fprintf(stderr, "-O can only be used once\n"); | |
1736 | usage(); | |
1737 | } | |
1738 | config_file = optarg; | |
1739 | break; | |
43c02e7b VB |
1740 | default: |
1741 | found = 0; | |
8b549648 | 1742 | for (i = 0; protos[i].mode != 0; i++) { |
43c02e7b | 1743 | if (ch == protos[i].arg) { |
b8a802bc VB |
1744 | found = 1; |
1745 | protos[i].enabled++; | |
43c02e7b VB |
1746 | } |
1747 | } | |
8b549648 | 1748 | if (!found) usage(); |
43c02e7b VB |
1749 | } |
1750 | } | |
8482abe9 | 1751 | |
efa6a7a3 VB |
1752 | if (version) { |
1753 | version_display(stdout, "lldpd", version > 1); | |
1754 | exit(0); | |
1755 | } | |
1756 | ||
59ca5ddb | 1757 | if (ctlname == NULL) ctlname = LLDPD_CTL_SOCKET; |
1c1c519f | 1758 | |
8482abe9 | 1759 | /* Set correct smart mode */ |
8b549648 VB |
1760 | for (i = 0; (filters[i].a != -1) && (filters[i].a != smart); i++) |
1761 | ; | |
8482abe9 VB |
1762 | if (filters[i].a == -1) { |
1763 | fprintf(stderr, "Incorrect mode for -H\n"); | |
1764 | usage(); | |
1765 | } | |
1766 | smart = filters[i].b; | |
6f8925be | 1767 | |
9856f279 | 1768 | log_init(use_syslog, debug, __progname); |
8b549648 | 1769 | tzset(); /* Get timezone info before chroot */ |
52767c4d VB |
1770 | if (use_syslog && daemonize) { |
1771 | /* So, we use syslog and we daemonize (or we are started by | |
7a730aff | 1772 | * systemd). No need to continue writing to stdout. */ |
52767c4d | 1773 | int fd; |
e1926a99 VB |
1774 | /* coverity[resource_leak] |
1775 | fd may be leaked if < 2, it's expected */ | |
52767c4d VB |
1776 | if ((fd = open("/dev/null", O_RDWR, 0)) != -1) { |
1777 | dup2(fd, STDIN_FILENO); | |
1778 | dup2(fd, STDOUT_FILENO); | |
1779 | dup2(fd, STDERR_FILENO); | |
1780 | if (fd > 2) close(fd); | |
1781 | } | |
1782 | } | |
f98e5666 | 1783 | log_debug("main", "lldpd " PACKAGE_VERSION " starting..."); |
2472bfda | 1784 | version_check(); |
73061a21 VB |
1785 | #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION |
1786 | fatalx("main", "fuzzing enabled, unsafe for production"); | |
1787 | #endif | |
6f8925be | 1788 | |
2e91d1a1 | 1789 | /* Grab uid and gid to use for priv sep */ |
28bf4022 | 1790 | #ifdef ENABLE_PRIVSEP |
2e91d1a1 | 1791 | if ((user = getpwnam(PRIVSEP_USER)) == NULL) |
8b549648 VB |
1792 | fatalx("main", |
1793 | "no " PRIVSEP_USER | |
1794 | " user for privilege separation, please create it"); | |
2e91d1a1 VB |
1795 | uid = user->pw_uid; |
1796 | if ((group = getgrnam(PRIVSEP_GROUP)) == NULL) | |
8b549648 VB |
1797 | fatalx("main", |
1798 | "no " PRIVSEP_GROUP | |
1799 | " group for privilege separation, please create it"); | |
2e91d1a1 | 1800 | gid = group->gr_gid; |
28bf4022 | 1801 | #endif |
2e91d1a1 VB |
1802 | |
1803 | /* Create and setup socket */ | |
8172214f | 1804 | int retry = 1; |
6f8925be | 1805 | log_debug("main", "creating control socket"); |
0262adbb | 1806 | while ((ctl = ctl_create(ctlname)) == -1) { |
8172214f VB |
1807 | if (retry-- && errno == EADDRINUSE) { |
1808 | /* Check if a daemon is really listening */ | |
1809 | int tfd; | |
8b549648 VB |
1810 | log_info("main", |
1811 | "unable to create control socket because it already exists"); | |
8172214f | 1812 | log_info("main", "check if another instance is running"); |
0262adbb | 1813 | if ((tfd = ctl_connect(ctlname)) != -1) { |
8172214f VB |
1814 | /* Another instance is running */ |
1815 | close(tfd); | |
8b549648 VB |
1816 | log_warnx("main", |
1817 | "another instance is running, please stop it"); | |
a87db231 | 1818 | fatalx("main", "giving up"); |
8172214f VB |
1819 | } else if (errno == ECONNREFUSED) { |
1820 | /* Nobody is listening */ | |
8b549648 VB |
1821 | log_info("main", |
1822 | "old control socket is present, clean it"); | |
0262adbb | 1823 | ctl_cleanup(ctlname); |
8172214f VB |
1824 | continue; |
1825 | } | |
8b549648 VB |
1826 | log_warn("main", |
1827 | "cannot determine if another daemon is already running"); | |
a87db231 | 1828 | fatalx("main", "giving up"); |
8172214f | 1829 | } |
ba54dbd0 | 1830 | log_warn("main", "unable to create control socket at %s", ctlname); |
a87db231 | 1831 | fatalx("main", "giving up"); |
2e91d1a1 | 1832 | } |
28bf4022 | 1833 | #ifdef ENABLE_PRIVSEP |
0262adbb | 1834 | if (chown(ctlname, uid, gid) == -1) |
6f8925be | 1835 | log_warn("main", "unable to chown control socket"); |
8b549648 VB |
1836 | if (chmod(ctlname, S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IWGRP | S_IXGRP) == |
1837 | -1) | |
6f8925be | 1838 | log_warn("main", "unable to chmod control socket"); |
28bf4022 | 1839 | #endif |
2e91d1a1 | 1840 | |
a1c9d4be VB |
1841 | /* Create associated advisory lock file */ |
1842 | char *lockname = NULL; | |
1843 | int fd; | |
1844 | if (asprintf(&lockname, "%s.lock", ctlname) == -1) | |
1845 | fatal("main", "cannot build lock name"); | |
8b549648 | 1846 | if ((fd = open(lockname, O_CREAT | O_RDWR, 0000)) == -1) |
a1c9d4be VB |
1847 | fatal("main", "cannot create lock file for control socket"); |
1848 | close(fd); | |
1849 | #ifdef ENABLE_PRIVSEP | |
1850 | if (chown(lockname, uid, gid) == -1) | |
1851 | log_warn("main", "unable to chown control socket lock"); | |
1852 | if (chmod(lockname, | |
8b549648 | 1853 | S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IWGRP | S_IXGRP) == -1) |
a1c9d4be VB |
1854 | log_warn("main", "unable to chmod control socket lock"); |
1855 | #endif | |
1856 | free(lockname); | |
1857 | ||
595184b0 VB |
1858 | /* Disable SIGPIPE */ |
1859 | signal(SIGPIPE, SIG_IGN); | |
1860 | ||
003620d3 ST |
1861 | /* Disable SIGHUP, until handlers are installed */ |
1862 | signal(SIGHUP, SIG_IGN); | |
1863 | ||
7a730aff | 1864 | /* Daemonization, unless started by systemd or launchd or debug */ |
a14e6dca | 1865 | #ifndef HOST_OS_OSX |
17f7469e | 1866 | if (!lldpd_started_by_systemd() && daemonize) { |
a14e6dca VB |
1867 | int pid; |
1868 | char *spid; | |
269c0188 | 1869 | log_debug("main", "going into background"); |
8b549648 VB |
1870 | if (daemon(0, 1) != 0) fatal("main", "failed to detach daemon"); |
1871 | if ((pid = open(pidfile, O_TRUNC | O_CREAT | O_WRONLY, 0666)) == -1) | |
1872 | fatal("main", | |
1873 | "unable to open pid file " LLDPD_PID_FILE | |
a14e6dca VB |
1874 | " (or the specified one)"); |
1875 | if (asprintf(&spid, "%d\n", getpid()) == -1) | |
8b549648 VB |
1876 | fatal("main", |
1877 | "unable to create pid file " LLDPD_PID_FILE | |
a14e6dca VB |
1878 | " (or the specified one)"); |
1879 | if (write(pid, spid, strlen(spid)) == -1) | |
8b549648 VB |
1880 | fatal("main", |
1881 | "unable to write pid file " LLDPD_PID_FILE | |
a14e6dca VB |
1882 | " (or the specified one)"); |
1883 | free(spid); | |
1884 | close(pid); | |
1885 | } | |
1886 | #endif | |
1887 | ||
a14e6dca VB |
1888 | /* Configuration with lldpcli */ |
1889 | if (lldpcli) { | |
94f6ce25 | 1890 | if (!config_file) { |
8b549648 VB |
1891 | log_debug("main", |
1892 | "invoking lldpcli for default configuration locations"); | |
94f6ce25 | 1893 | } else { |
8b549648 VB |
1894 | log_debug("main", |
1895 | "invoking lldpcli for user supplied configuration location"); | |
94f6ce25 | 1896 | } |
8b549648 VB |
1897 | if (lldpd_configure(use_syslog, debug, lldpcli, ctlname, config_file) == |
1898 | -1) | |
a14e6dca VB |
1899 | fatal("main", "unable to spawn lldpcli"); |
1900 | } | |
1901 | ||
ae87586a MT |
1902 | /* Try to read system information from /etc/os-release if possible. |
1903 | Fall back to lsb_release for compatibility. */ | |
6f8925be | 1904 | log_debug("main", "get OS/LSB release information"); |
ae87586a MT |
1905 | lsb_release = lldpd_get_os_release(); |
1906 | if (!lsb_release) { | |
1907 | lsb_release = lldpd_get_lsb_release(); | |
1908 | } | |
c036b15d | 1909 | |
e47140de VB |
1910 | log_debug("main", "initialize privilege separation"); |
1911 | #ifdef ENABLE_PRIVSEP | |
1912 | priv_init(PRIVSEP_CHROOT, ctl, uid, gid); | |
1913 | #else | |
8c69002b | 1914 | priv_init(); |
e47140de VB |
1915 | #endif |
1916 | ||
d6e889b6 | 1917 | /* Initialization of global configuration */ |
8b549648 | 1918 | if ((cfg = (struct lldpd *)calloc(1, sizeof(struct lldpd))) == NULL) |
6f8925be | 1919 | fatal("main", NULL); |
43c02e7b | 1920 | |
9da663f7 | 1921 | lldpd_alloc_default_local_port(cfg); |
0262adbb | 1922 | cfg->g_ctlname = ctlname; |
2e91d1a1 | 1923 | cfg->g_ctl = ctl; |
8ec333bd VB |
1924 | cfg->g_config.c_mgmt_pattern = mgmtp; |
1925 | cfg->g_config.c_cid_pattern = cidp; | |
1926 | cfg->g_config.c_iface_pattern = interfaces; | |
1927 | cfg->g_config.c_smart = smart; | |
8b549648 | 1928 | if (lldpcli) cfg->g_config.c_paused = 1; |
8ec333bd | 1929 | cfg->g_config.c_receiveonly = receiveonly; |
74f55c2e | 1930 | cfg->g_config.c_tx_interval = LLDPD_TX_INTERVAL * 1000; |
c10302a3 | 1931 | cfg->g_config.c_tx_hold = LLDPD_TX_HOLD; |
71b0f981 | 1932 | cfg->g_config.c_ttl = cfg->g_config.c_tx_interval * cfg->g_config.c_tx_hold; |
74f55c2e | 1933 | cfg->g_config.c_ttl = (cfg->g_config.c_ttl + 999) / 1000; |
42589660 | 1934 | cfg->g_config.c_max_neighbors = LLDPD_MAX_NEIGHBORS; |
be511d00 | 1935 | #ifdef ENABLE_LLDPMED |
486a6133 | 1936 | cfg->g_config.c_enable_fast_start = enable_fast_start; |
b9de0ca6 | 1937 | cfg->g_config.c_tx_fast_init = LLDPD_FAST_INIT; |
1938 | cfg->g_config.c_tx_fast_interval = LLDPD_FAST_TX_INTERVAL; | |
be511d00 | 1939 | #endif |
d6e889b6 VB |
1940 | #ifdef USE_SNMP |
1941 | cfg->g_snmp = snmp; | |
1942 | cfg->g_snmp_agentx = agentx; | |
1943 | #endif /* USE_SNMP */ | |
8b549648 | 1944 | cfg->g_config.c_bond_slave_src_mac_type = |
0e29d794 | 1945 | LLDP_BOND_SLAVE_SRC_MAC_TYPE_LOCALLY_ADMINISTERED; |
43c02e7b VB |
1946 | |
1947 | /* Get ioctl socket */ | |
6f8925be | 1948 | log_debug("main", "get an ioctl socket"); |
43c02e7b | 1949 | if ((cfg->g_sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) |
6f8925be | 1950 | fatal("main", "failed to get ioctl socket"); |
43c02e7b | 1951 | |
c036b15d | 1952 | /* Description */ |
8b549648 VB |
1953 | if (!(cfg->g_config.c_advertise_version = advertise_version) && lsb_release && |
1954 | lsb_release[strlen(lsb_release) - 1] == '\n') | |
c036b15d VB |
1955 | lsb_release[strlen(lsb_release) - 1] = '\0'; |
1956 | cfg->g_lsb_release = lsb_release; | |
8b549648 | 1957 | if (descr_override) cfg->g_config.c_description = descr_override; |
40ce835b | 1958 | |
8b549648 | 1959 | if (platform_override) cfg->g_config.c_platform = platform_override; |
d4afb919 | 1960 | |
43c02e7b | 1961 | /* Set system capabilities */ |
6f8925be | 1962 | log_debug("main", "set system capabilities"); |
8b549648 VB |
1963 | if ((lchassis = (struct lldpd_chassis *)calloc(1, |
1964 | sizeof(struct lldpd_chassis))) == NULL) | |
6f8925be | 1965 | fatal("localchassis", NULL); |
ca838758 | 1966 | cfg->g_config.c_cap_advertise = 1; |
4c8e6e37 | 1967 | cfg->g_config.c_cap_override = 0; |
8b549648 VB |
1968 | lchassis->c_cap_available = |
1969 | LLDP_CAP_BRIDGE | LLDP_CAP_WLAN | LLDP_CAP_ROUTER | LLDP_CAP_STATION; | |
1c2217aa | 1970 | cfg->g_config.c_mgmt_advertise = 1; |
e6b36c87 | 1971 | TAILQ_INIT(&lchassis->c_mgmt); |
89840df0 VB |
1972 | #ifdef ENABLE_LLDPMED |
1973 | if (lldpmed > 0) { | |
4b292b55 | 1974 | if (lldpmed == LLDP_MED_CLASS_III) |
77507b69 VB |
1975 | lchassis->c_cap_available |= LLDP_CAP_TELEPHONE; |
1976 | lchassis->c_med_type = lldpmed; | |
8b549648 VB |
1977 | lchassis->c_med_cap_available = LLDP_MED_CAP_CAP | LLDP_MED_CAP_IV | |
1978 | LLDP_MED_CAP_LOCATION | LLDP_MED_CAP_POLICY | LLDP_MED_CAP_MDI_PSE | | |
1979 | LLDP_MED_CAP_MDI_PD; | |
8ec333bd | 1980 | cfg->g_config.c_noinventory = noinventory; |
42bddd41 | 1981 | } else |
8ec333bd | 1982 | cfg->g_config.c_noinventory = 1; |
89840df0 | 1983 | #endif |
43c02e7b | 1984 | |
6f8925be | 1985 | log_debug("main", "initialize protocols"); |
43c02e7b | 1986 | cfg->g_protocols = protos; |
8b549648 | 1987 | for (i = 0; protos[i].mode != 0; i++) { |
b8a802bc VB |
1988 | |
1989 | /* With -ll, disable LLDP */ | |
8b549648 | 1990 | if (protos[i].mode == LLDPD_MODE_LLDP) protos[i].enabled %= 3; |
b8a802bc VB |
1991 | /* With -ccc force CDPV2, enable CDPV1 */ |
1992 | if (protos[i].mode == LLDPD_MODE_CDPV1 && protos[i].enabled == 3) { | |
1993 | protos[i].enabled = 1; | |
1994 | } | |
1995 | /* With -cc force CDPV1, enable CDPV2 */ | |
1996 | if (protos[i].mode == LLDPD_MODE_CDPV2 && protos[i].enabled == 2) { | |
1997 | protos[i].enabled = 1; | |
1998 | } | |
1999 | ||
611aba00 MS |
2000 | /* With -cccc disable CDPV1, enable CDPV2 */ |
2001 | if (protos[i].mode == LLDPD_MODE_CDPV1 && protos[i].enabled >= 4) { | |
2002 | protos[i].enabled = 0; | |
2003 | } | |
2004 | ||
2005 | /* With -cccc disable CDPV1, enable CDPV2; -ccccc will force CDPv2 */ | |
2006 | if (protos[i].mode == LLDPD_MODE_CDPV2 && protos[i].enabled == 4) { | |
2007 | protos[i].enabled = 1; | |
2008 | } | |
2009 | ||
0c877af0 | 2010 | if (protos[i].enabled > 1) |
8b549648 VB |
2011 | log_info("main", "protocol %s enabled and forced", |
2012 | protos[i].name); | |
0c877af0 | 2013 | else if (protos[i].enabled) |
6f8925be | 2014 | log_info("main", "protocol %s enabled", protos[i].name); |
0c877af0 | 2015 | else |
6f8925be | 2016 | log_info("main", "protocol %s disabled", protos[i].name); |
8b549648 | 2017 | } |
43c02e7b VB |
2018 | |
2019 | TAILQ_INIT(&cfg->g_hardware); | |
77507b69 VB |
2020 | TAILQ_INIT(&cfg->g_chassis); |
2021 | TAILQ_INSERT_TAIL(&cfg->g_chassis, lchassis, c_entries); | |
9898ac07 | 2022 | lchassis->c_refcount++; /* We should always keep a reference to local chassis */ |
43c02e7b | 2023 | |
d6e889b6 | 2024 | /* Main loop */ |
6f8925be | 2025 | log_debug("main", "start main loop"); |
d6e889b6 | 2026 | levent_loop(cfg); |
24cb9684 | 2027 | lchassis->c_refcount--; |
d6e889b6 | 2028 | lldpd_exit(cfg); |
8262175d | 2029 | free(cfg); |
43c02e7b VB |
2030 | |
2031 | return (0); | |
2032 | } |