1 /**
2 * collectd - src/netlink.c
3 * Copyright (C) 2007-2010 Florian octo Forster
4 * Copyright (C) 2008-2012 Sebastian Harl
5 * Copyright (C) 2013 Andreas Henriksson
6 * Copyright (C) 2013 Marc Fournier
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; only version 2 of the License is applicable.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 *
21 * Authors:
22 * Florian octo Forster <octo at collectd.org>
23 * Sebastian Harl <sh at tokkee.org>
24 * Andreas Henriksson <andreas at fatal.se>
25 * Marc Fournier <marc.fournier at camptocamp.com>
26 **/
28 #include "collectd.h"
29 #include "plugin.h"
30 #include "common.h"
32 #include <asm/types.h>
33 #include <sys/socket.h>
35 #include <linux/netlink.h>
36 #include <linux/rtnetlink.h>
37 #if HAVE_LINUX_GEN_STATS_H
38 # include <linux/gen_stats.h>
39 #endif
40 #if HAVE_LINUX_PKT_SCHED_H
41 # include <linux/pkt_sched.h>
42 #endif
44 #include <libmnl/libmnl.h>
46 typedef struct ir_ignorelist_s
47 {
48 char *device;
49 char *type;
50 char *inst;
51 struct ir_ignorelist_s *next;
52 } ir_ignorelist_t;
54 static int ir_ignorelist_invert = 1;
55 static ir_ignorelist_t *ir_ignorelist_head = NULL;
57 static struct mnl_socket *nl;
59 static char **iflist = NULL;
60 static size_t iflist_len = 0;
62 static const char *config_keys[] =
63 {
64 "Interface",
65 "VerboseInterface",
66 "QDisc",
67 "Class",
68 "Filter",
69 "IgnoreSelected"
70 };
71 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
73 static int add_ignorelist (const char *dev, const char *type,
74 const char *inst)
75 {
76 ir_ignorelist_t *entry;
78 entry = (ir_ignorelist_t *) malloc (sizeof (ir_ignorelist_t));
79 if (entry == NULL)
80 return (-1);
82 memset (entry, '\0', sizeof (ir_ignorelist_t));
84 if (strcasecmp (dev, "All") != 0)
85 {
86 entry->device = strdup (dev);
87 if (entry->device == NULL)
88 {
89 sfree (entry);
90 return (-1);
91 }
92 }
94 entry->type = strdup (type);
95 if (entry->type == NULL)
96 {
97 sfree (entry->device);
98 sfree (entry);
99 return (-1);
100 }
102 if (inst != NULL)
103 {
104 entry->inst = strdup (inst);
105 if (entry->inst == NULL)
106 {
107 sfree (entry->type);
108 sfree (entry->device);
109 sfree (entry);
110 return (-1);
111 }
112 }
114 entry->next = ir_ignorelist_head;
115 ir_ignorelist_head = entry;
117 return (0);
118 } /* int add_ignorelist */
120 /*
121 * Checks wether a data set should be ignored. Returns `true' is the value
122 * should be ignored, `false' otherwise.
123 */
124 static int check_ignorelist (const char *dev,
125 const char *type, const char *type_instance)
126 {
127 ir_ignorelist_t *i;
129 assert ((dev != NULL) && (type != NULL));
131 if (ir_ignorelist_head == NULL)
132 return (ir_ignorelist_invert ? 0 : 1);
134 for (i = ir_ignorelist_head; i != NULL; i = i->next)
135 {
136 /* i->device == NULL => match all devices */
137 if ((i->device != NULL)
138 && (strcasecmp (i->device, dev) != 0))
139 continue;
141 if (strcasecmp (i->type, type) != 0)
142 continue;
144 if ((i->inst != NULL) && (type_instance != NULL)
145 && (strcasecmp (i->inst, type_instance) != 0))
146 continue;
148 DEBUG ("netlink plugin: check_ignorelist: "
149 "(dev = %s; type = %s; inst = %s) matched "
150 "(dev = %s; type = %s; inst = %s)",
151 dev, type,
152 type_instance == NULL ? "(nil)" : type_instance,
153 i->device == NULL ? "(nil)" : i->device,
154 i->type,
155 i->inst == NULL ? "(nil)" : i->inst);
157 return (ir_ignorelist_invert ? 0 : 1);
158 } /* for i */
160 return (ir_ignorelist_invert);
161 } /* int check_ignorelist */
163 static void submit_one (const char *dev, const char *type,
164 const char *type_instance, derive_t value)
165 {
166 value_t values[1];
167 value_list_t vl = VALUE_LIST_INIT;
169 values[0].derive = value;
171 vl.values = values;
172 vl.values_len = 1;
173 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
174 sstrncpy (vl.plugin, "netlink", sizeof (vl.plugin));
175 sstrncpy (vl.plugin_instance, dev, sizeof (vl.plugin_instance));
176 sstrncpy (vl.type, type, sizeof (vl.type));
178 if (type_instance != NULL)
179 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
181 plugin_dispatch_values (&vl);
182 } /* void submit_one */
184 static void submit_two (const char *dev, const char *type,
185 const char *type_instance,
186 derive_t rx, derive_t tx)
187 {
188 value_t values[2];
189 value_list_t vl = VALUE_LIST_INIT;
191 values[0].derive = rx;
192 values[1].derive = tx;
194 vl.values = values;
195 vl.values_len = 2;
196 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
197 sstrncpy (vl.plugin, "netlink", sizeof (vl.plugin));
198 sstrncpy (vl.plugin_instance, dev, sizeof (vl.plugin_instance));
199 sstrncpy (vl.type, type, sizeof (vl.type));
201 if (type_instance != NULL)
202 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
204 plugin_dispatch_values (&vl);
205 } /* void submit_two */
207 static int update_iflist (struct ifinfomsg *msg, const char *dev)
208 {
209 /* Update the `iflist'. It's used to know which interfaces exist and query
210 * them later for qdiscs and classes. */
211 if ((msg->ifi_index >= 0) && ((size_t) msg->ifi_index >= iflist_len))
212 {
213 char **temp;
215 temp = (char **) realloc (iflist, (msg->ifi_index + 1) * sizeof (char *));
216 if (temp == NULL)
217 {
218 ERROR ("netlink plugin: update_iflist: realloc failed.");
219 return (-1);
220 }
222 memset (temp + iflist_len, '\0',
223 (msg->ifi_index + 1 - iflist_len) * sizeof (char *));
224 iflist = temp;
225 iflist_len = msg->ifi_index + 1;
226 }
227 if ((iflist[msg->ifi_index] == NULL)
228 || (strcmp (iflist[msg->ifi_index], dev) != 0))
229 {
230 sfree (iflist[msg->ifi_index]);
231 iflist[msg->ifi_index] = strdup (dev);
232 }
234 return (0);
235 } /* int update_iflist */
237 static void check_ignorelist_and_submit (const char *dev,
238 struct rtnl_link_stats *stats)
239 {
241 if (check_ignorelist (dev, "interface", NULL) == 0)
242 {
243 submit_two (dev, "if_octets", NULL, stats->rx_bytes, stats->tx_bytes);
244 submit_two (dev, "if_packets", NULL, stats->rx_packets, stats->tx_packets);
245 submit_two (dev, "if_errors", NULL, stats->rx_errors, stats->tx_errors);
246 }
247 else
248 {
249 DEBUG ("netlink plugin: Ignoring %s/interface.", dev);
250 }
252 if (check_ignorelist (dev, "if_detail", NULL) == 0)
253 {
254 submit_two (dev, "if_dropped", NULL, stats->rx_dropped, stats->tx_dropped);
255 submit_one (dev, "if_multicast", NULL, stats->multicast);
256 submit_one (dev, "if_collisions", NULL, stats->collisions);
258 submit_one (dev, "if_rx_errors", "length", stats->rx_length_errors);
259 submit_one (dev, "if_rx_errors", "over", stats->rx_over_errors);
260 submit_one (dev, "if_rx_errors", "crc", stats->rx_crc_errors);
261 submit_one (dev, "if_rx_errors", "frame", stats->rx_frame_errors);
262 submit_one (dev, "if_rx_errors", "fifo", stats->rx_fifo_errors);
263 submit_one (dev, "if_rx_errors", "missed", stats->rx_missed_errors);
265 submit_one (dev, "if_tx_errors", "aborted", stats->tx_aborted_errors);
266 submit_one (dev, "if_tx_errors", "carrier", stats->tx_carrier_errors);
267 submit_one (dev, "if_tx_errors", "fifo", stats->tx_fifo_errors);
268 submit_one (dev, "if_tx_errors", "heartbeat", stats->tx_heartbeat_errors);
269 submit_one (dev, "if_tx_errors", "window", stats->tx_window_errors);
270 }
271 else
272 {
273 DEBUG ("netlink plugin: Ignoring %s/if_detail.", dev);
274 }
276 } /* void check_ignorelist_and_submit */
278 static int link_filter_cb (const struct nlmsghdr *nlh,
279 void *args __attribute__((unused)))
280 {
281 struct ifinfomsg *ifm = mnl_nlmsg_get_payload (nlh);
282 struct nlattr *attr;
283 struct rtnl_link_stats *stats = NULL;
284 const char *dev = NULL;
286 if (nlh->nlmsg_type != RTM_NEWLINK)
287 {
288 ERROR ("netlink plugin: link_filter_cb: Don't know how to handle type %i.",
289 nlh->nlmsg_type);
290 return MNL_CB_ERROR;
291 }
293 /* Scan attribute list for device name. */
294 mnl_attr_for_each (attr, nlh, sizeof (*ifm))
295 {
296 if (mnl_attr_get_type (attr) != IFLA_IFNAME)
297 continue;
299 if (mnl_attr_validate (attr, MNL_TYPE_STRING) < 0)
300 {
301 ERROR ("netlink plugin: link_filter_cb: IFLA_IFNAME mnl_attr_validate failed.");
302 return MNL_CB_ERROR;
303 }
305 dev = mnl_attr_get_str (attr);
306 if (update_iflist (ifm, dev) < 0)
307 return MNL_CB_ERROR;
308 break;
309 }
311 if (dev == NULL)
312 {
313 ERROR ("netlink plugin: link_filter_cb: dev == NULL");
314 return MNL_CB_ERROR;
315 }
317 mnl_attr_for_each (attr, nlh, sizeof (*ifm))
318 {
319 if (mnl_attr_get_type (attr) != IFLA_STATS)
320 continue;
322 if (mnl_attr_validate2 (attr, MNL_TYPE_UNSPEC, sizeof (*stats)) < 0)
323 {
324 ERROR ("netlink plugin: link_filter_cb: IFLA_STATS mnl_attr_validate2 failed.");
325 return MNL_CB_ERROR;
326 }
327 stats = mnl_attr_get_payload (attr);
329 check_ignorelist_and_submit (dev, stats);
330 break;
331 }
333 if (stats == NULL)
334 {
335 DEBUG ("netlink plugin: link_filter: No statistics for interface %s.", dev);
336 return MNL_CB_OK;
337 }
339 return MNL_CB_OK;
340 } /* int link_filter_cb */
342 #if HAVE_TCA_STATS2
343 static int qos_attr_cb (const struct nlattr *attr, void *data)
344 {
345 struct gnet_stats_basic **bs = (struct gnet_stats_basic **)data;
347 /* skip unsupported attribute in user-space */
348 if (mnl_attr_type_valid (attr, TCA_STATS_MAX) < 0)
349 return MNL_CB_OK;
351 if (mnl_attr_get_type (attr) == TCA_STATS_BASIC)
352 {
353 if (mnl_attr_validate2 (attr, MNL_TYPE_UNSPEC, sizeof (**bs)) < 0)
354 {
355 ERROR ("netlink plugin: qos_attr_cb: TCA_STATS_BASIC mnl_attr_validate2 failed.");
356 return MNL_CB_ERROR;
357 }
358 *bs = mnl_attr_get_payload (attr);
359 return MNL_CB_STOP;
360 }
362 return MNL_CB_OK;
363 } /* qos_attr_cb */
364 #endif
366 static int qos_filter_cb (const struct nlmsghdr *nlh, void *args)
367 {
368 struct tcmsg *tm = mnl_nlmsg_get_payload (nlh);
369 struct nlattr *attr;
371 int wanted_ifindex = *((int *) args);
373 const char *dev;
374 const char *kind = NULL;
376 /* char *type_instance; */
377 char *tc_type;
378 char tc_inst[DATA_MAX_NAME_LEN];
380 _Bool stats_submitted = 0;
382 if (nlh->nlmsg_type == RTM_NEWQDISC)
383 tc_type = "qdisc";
384 else if (nlh->nlmsg_type == RTM_NEWTCLASS)
385 tc_type = "class";
386 else if (nlh->nlmsg_type == RTM_NEWTFILTER)
387 tc_type = "filter";
388 else
389 {
390 ERROR ("netlink plugin: qos_filter_cb: Don't know how to handle type %i.",
391 nlh->nlmsg_type);
392 return MNL_CB_ERROR;
393 }
395 if (tm->tcm_ifindex != wanted_ifindex)
396 {
397 DEBUG ("netlink plugin: qos_filter_cb: Got %s for interface #%i, "
398 "but expected #%i.",
399 tc_type, tm->tcm_ifindex, wanted_ifindex);
400 return MNL_CB_OK;
401 }
403 if ((tm->tcm_ifindex >= 0)
404 && ((size_t) tm->tcm_ifindex >= iflist_len))
405 {
406 ERROR ("netlink plugin: qos_filter_cb: tm->tcm_ifindex = %i "
407 ">= iflist_len = %zu",
408 tm->tcm_ifindex, iflist_len);
409 return MNL_CB_ERROR;
410 }
412 dev = iflist[tm->tcm_ifindex];
413 if (dev == NULL)
414 {
415 ERROR ("netlink plugin: qos_filter_cb: iflist[%i] == NULL",
416 tm->tcm_ifindex);
417 return MNL_CB_ERROR;
418 }
420 mnl_attr_for_each (attr, nlh, sizeof (*tm))
421 {
422 if (mnl_attr_get_type (attr) != TCA_KIND)
423 continue;
425 if (mnl_attr_validate (attr, MNL_TYPE_STRING) < 0)
426 {
427 ERROR ("netlink plugin: qos_filter_cb: TCA_KIND mnl_attr_validate failed.");
428 return MNL_CB_ERROR;
429 }
431 kind = mnl_attr_get_str (attr);
432 break;
433 }
435 if (kind == NULL)
436 {
437 ERROR ("netlink plugin: qos_filter_cb: kind == NULL");
438 return (-1);
439 }
441 { /* The ID */
442 uint32_t numberic_id;
444 numberic_id = tm->tcm_handle;
445 if (strcmp (tc_type, "filter") == 0)
446 numberic_id = tm->tcm_parent;
448 ssnprintf (tc_inst, sizeof (tc_inst), "%s-%x:%x",
449 kind,
450 numberic_id >> 16,
451 numberic_id & 0x0000FFFF);
452 }
454 DEBUG ("netlink plugin: qos_filter_cb: got %s for %s (%i).",
455 tc_type, dev, tm->tcm_ifindex);
457 if (check_ignorelist (dev, tc_type, tc_inst))
458 return MNL_CB_OK;
460 #if HAVE_TCA_STATS2
461 mnl_attr_for_each (attr, nlh, sizeof (*tm))
462 {
463 struct gnet_stats_basic *bs = NULL;
465 if (mnl_attr_get_type (attr) != TCA_STATS2)
466 continue;
468 if (mnl_attr_validate (attr, MNL_TYPE_NESTED) < 0)
469 {
470 ERROR ("netlink plugin: qos_filter_cb: TCA_STATS2 mnl_attr_validate failed.");
471 return MNL_CB_ERROR;
472 }
474 mnl_attr_parse_nested (attr, qos_attr_cb, &bs);
476 if (bs != NULL)
477 {
478 char type_instance[DATA_MAX_NAME_LEN];
480 stats_submitted = 1;
482 ssnprintf (type_instance, sizeof (type_instance), "%s-%s",
483 tc_type, tc_inst);
485 submit_one (dev, "ipt_bytes", type_instance, bs->bytes);
486 submit_one (dev, "ipt_packets", type_instance, bs->packets);
487 }
489 break;
490 }
491 #endif /* TCA_STATS2 */
493 #if HAVE_TCA_STATS
494 mnl_attr_for_each (attr, nlh, sizeof (*tm))
495 {
496 struct tc_stats *ts = NULL;
498 if (mnl_attr_get_type (attr) != TCA_STATS)
499 continue;
501 if (mnl_attr_validate2 (attr, MNL_TYPE_UNSPEC, sizeof (*ts)) < 0)
502 {
503 ERROR ("netlink plugin: qos_filter_cb: TCA_STATS mnl_attr_validate2 failed.");
504 return MNL_CB_ERROR;
505 }
506 ts = mnl_attr_get_payload (attr);
508 if (!stats_submitted && ts != NULL)
509 {
510 char type_instance[DATA_MAX_NAME_LEN];
512 ssnprintf (type_instance, sizeof (type_instance), "%s-%s",
513 tc_type, tc_inst);
515 submit_one (dev, "ipt_bytes", type_instance, ts->bytes);
516 submit_one (dev, "ipt_packets", type_instance, ts->packets);
517 }
519 break;
520 }
522 #endif /* TCA_STATS */
524 #if !(HAVE_TCA_STATS && HAVE_TCA_STATS2)
525 DEBUG ("netlink plugin: qos_filter_cb: Have neither TCA_STATS2 nor "
526 "TCA_STATS.");
527 #endif
529 return MNL_CB_OK;
530 } /* int qos_filter_cb */
532 static int ir_config (const char *key, const char *value)
533 {
534 char *new_val;
535 char *fields[8];
536 int fields_num;
537 int status = 1;
539 new_val = strdup (value);
540 if (new_val == NULL)
541 return (-1);
543 fields_num = strsplit (new_val, fields, STATIC_ARRAY_SIZE (fields));
544 if ((fields_num < 1) || (fields_num > 8))
545 {
546 sfree (new_val);
547 return (-1);
548 }
550 if ((strcasecmp (key, "Interface") == 0)
551 || (strcasecmp (key, "VerboseInterface") == 0))
552 {
553 if (fields_num != 1)
554 {
555 ERROR ("netlink plugin: Invalid number of fields for option "
556 "`%s'. Got %i, expected 1.", key, fields_num);
557 status = -1;
558 }
559 else
560 {
561 add_ignorelist (fields[0], "interface", NULL);
562 if (strcasecmp (key, "VerboseInterface") == 0)
563 add_ignorelist (fields[0], "if_detail", NULL);
564 status = 0;
565 }
566 }
567 else if ((strcasecmp (key, "QDisc") == 0)
568 || (strcasecmp (key, "Class") == 0)
569 || (strcasecmp (key, "Filter") == 0))
570 {
571 if ((fields_num < 1) || (fields_num > 2))
572 {
573 ERROR ("netlink plugin: Invalid number of fields for option "
574 "`%s'. Got %i, expected 1 or 2.", key, fields_num);
575 return (-1);
576 }
577 else
578 {
579 add_ignorelist (fields[0], key,
580 (fields_num == 2) ? fields[1] : NULL);
581 status = 0;
582 }
583 }
584 else if (strcasecmp (key, "IgnoreSelected") == 0)
585 {
586 if (fields_num != 1)
587 {
588 ERROR ("netlink plugin: Invalid number of fields for option "
589 "`IgnoreSelected'. Got %i, expected 1.", fields_num);
590 status = -1;
591 }
592 else
593 {
594 if (IS_TRUE (fields[0]))
595 ir_ignorelist_invert = 0;
596 else
597 ir_ignorelist_invert = 1;
598 status = 0;
599 }
600 }
602 sfree (new_val);
604 return (status);
605 } /* int ir_config */
607 static int ir_init (void)
608 {
609 nl = mnl_socket_open (NETLINK_ROUTE);
610 if (nl == NULL)
611 {
612 ERROR ("netlink plugin: ir_init: mnl_socket_open failed.");
613 return (-1);
614 }
616 if (mnl_socket_bind (nl, 0, MNL_SOCKET_AUTOPID) < 0)
617 {
618 ERROR ("netlink plugin: ir_init: mnl_socket_bind failed.");
619 return (-1);
620 }
622 return (0);
623 } /* int ir_init */
625 static int ir_read (void)
626 {
627 char buf[MNL_SOCKET_BUFFER_SIZE];
628 struct nlmsghdr *nlh;
629 struct rtgenmsg *rt;
630 int ret;
631 unsigned int seq, portid;
633 size_t ifindex;
635 static const int type_id[] = { RTM_GETQDISC, RTM_GETTCLASS, RTM_GETTFILTER };
636 static const char *type_name[] = { "qdisc", "class", "filter" };
638 portid = mnl_socket_get_portid (nl);
640 nlh = mnl_nlmsg_put_header (buf);
641 nlh->nlmsg_type = RTM_GETLINK;
642 nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
643 nlh->nlmsg_seq = seq = time (NULL);
644 rt = mnl_nlmsg_put_extra_header (nlh, sizeof (*rt));
645 rt->rtgen_family = AF_PACKET;
647 if (mnl_socket_sendto (nl, nlh, nlh->nlmsg_len) < 0)
648 {
649 ERROR ("netlink plugin: ir_read: rtnl_wilddump_request failed.");
650 return (-1);
651 }
653 ret = mnl_socket_recvfrom (nl, buf, sizeof (buf));
654 while (ret > 0)
655 {
656 ret = mnl_cb_run (buf, ret, seq, portid, link_filter_cb, NULL);
657 if (ret <= MNL_CB_STOP)
658 break;
659 ret = mnl_socket_recvfrom (nl, buf, sizeof (buf));
660 }
661 if (ret < 0)
662 {
663 ERROR ("netlink plugin: ir_read: mnl_socket_recvfrom failed.");
664 return (-1);
665 }
667 /* `link_filter_cb' will update `iflist' which is used here to iterate
668 * over all interfaces. */
669 for (ifindex = 1; ifindex < iflist_len; ifindex++)
670 {
671 struct tcmsg *tm;
672 size_t type_index;
674 if (iflist[ifindex] == NULL)
675 continue;
677 for (type_index = 0; type_index < STATIC_ARRAY_SIZE (type_id); type_index++)
678 {
679 if (check_ignorelist (iflist[ifindex], type_name[type_index], NULL))
680 {
681 DEBUG ("netlink plugin: ir_read: check_ignorelist (%s, %s, (nil)) "
682 "== TRUE", iflist[ifindex], type_name[type_index]);
683 continue;
684 }
686 DEBUG ("netlink plugin: ir_read: querying %s from %s (%lu).",
687 type_name[type_index], iflist[ifindex], ifindex);
689 nlh = mnl_nlmsg_put_header (buf);
690 nlh->nlmsg_type = type_id[type_index];
691 nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
692 nlh->nlmsg_seq = seq = time (NULL);
693 tm = mnl_nlmsg_put_extra_header (nlh, sizeof (*tm));
694 tm->tcm_family = AF_PACKET;
695 tm->tcm_ifindex = ifindex;
697 if (mnl_socket_sendto (nl, nlh, nlh->nlmsg_len) < 0)
698 {
699 ERROR ("netlink plugin: ir_read: mnl_socket_sendto failed.");
700 continue;
701 }
703 ret = mnl_socket_recvfrom (nl, buf, sizeof (buf));
704 while (ret > 0)
705 {
706 ret = mnl_cb_run (buf, ret, seq, portid, qos_filter_cb, &ifindex);
707 if (ret <= MNL_CB_STOP)
708 break;
709 ret = mnl_socket_recvfrom (nl, buf, sizeof (buf));
710 }
711 if (ret < 0)
712 {
713 ERROR ("netlink plugin: ir_read:mnl_socket_recvfrom failed.");
714 continue;
715 }
717 } /* for (type_index) */
718 } /* for (if_index) */
720 return (0);
721 } /* int ir_read */
723 static int ir_shutdown (void)
724 {
725 if (nl)
726 {
727 mnl_socket_close (nl);
728 nl = NULL;
729 }
731 return (0);
732 } /* int ir_shutdown */
734 void module_register (void)
735 {
736 plugin_register_config ("netlink", ir_config, config_keys, config_keys_num);
737 plugin_register_init ("netlink", ir_init);
738 plugin_register_read ("netlink", ir_read);
739 plugin_register_shutdown ("netlink", ir_shutdown);
740 } /* void module_register */
742 /*
743 * vim: set shiftwidth=2 softtabstop=2 tabstop=8 :
744 */