2ceb30b1676da6f2c2aa4dc44f9158807fb35d38
1 /**
2 * collectd - src/network.c
3 * Copyright (C) 2005-2008 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Florian octo Forster <octo at verplant.org>
20 **/
22 #include "collectd.h"
23 #include "plugin.h"
24 #include "common.h"
25 #include "configfile.h"
26 #include "utils_avltree.h"
28 #include "network.h"
30 #if HAVE_PTHREAD_H
31 # include <pthread.h>
32 #endif
33 #if HAVE_SYS_SOCKET_H
34 # include <sys/socket.h>
35 #endif
36 #if HAVE_NETDB_H
37 # include <netdb.h>
38 #endif
39 #if HAVE_NETINET_IN_H
40 # include <netinet/in.h>
41 #endif
42 #if HAVE_ARPA_INET_H
43 # include <arpa/inet.h>
44 #endif
45 #if HAVE_POLL_H
46 # include <poll.h>
47 #endif
49 /* 1500 - 40 - 8 = Ethernet packet - IPv6 header - UDP header */
50 /* #define BUFF_SIZE 1452 */
52 #ifndef IPV6_ADD_MEMBERSHIP
53 # ifdef IPV6_JOIN_GROUP
54 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
55 # else
56 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
57 # endif
58 #endif /* !IP_ADD_MEMBERSHIP */
60 #define BUFF_SIZE 1024
62 /*
63 * Private data types
64 */
65 typedef struct sockent
66 {
67 int fd;
68 struct sockaddr_storage *addr;
69 socklen_t addrlen;
70 struct sockent *next;
71 } sockent_t;
73 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
74 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
75 * +-------+-----------------------+-------------------------------+
76 * ! Ver. ! ! Length !
77 * +-------+-----------------------+-------------------------------+
78 */
79 struct part_header_s
80 {
81 uint16_t type;
82 uint16_t length;
83 };
84 typedef struct part_header_s part_header_t;
86 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
87 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
88 * +-------------------------------+-------------------------------+
89 * ! Type ! Length !
90 * +-------------------------------+-------------------------------+
91 * : (Length - 4) Bytes :
92 * +---------------------------------------------------------------+
93 */
94 struct part_string_s
95 {
96 part_header_t *head;
97 char *value;
98 };
99 typedef struct part_string_s part_string_t;
101 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
102 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
103 * +-------------------------------+-------------------------------+
104 * ! Type ! Length !
105 * +-------------------------------+-------------------------------+
106 * : (Length - 4 == 2 || 4 || 8) Bytes :
107 * +---------------------------------------------------------------+
108 */
109 struct part_number_s
110 {
111 part_header_t *head;
112 uint64_t *value;
113 };
114 typedef struct part_number_s part_number_t;
116 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
117 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
118 * +-------------------------------+-------------------------------+
119 * ! Type ! Length !
120 * +-------------------------------+---------------+---------------+
121 * ! Num of values ! Type0 ! Type1 !
122 * +-------------------------------+---------------+---------------+
123 * ! Value0 !
124 * ! !
125 * +---------------------------------------------------------------+
126 * ! Value1 !
127 * ! !
128 * +---------------------------------------------------------------+
129 */
130 struct part_values_s
131 {
132 part_header_t *head;
133 uint16_t *num_values;
134 uint8_t *values_types;
135 value_t *values;
136 };
137 typedef struct part_values_s part_values_t;
139 struct receive_list_entry_s
140 {
141 char data[BUFF_SIZE];
142 int data_len;
143 struct receive_list_entry_s *next;
144 };
145 typedef struct receive_list_entry_s receive_list_entry_t;
147 /*
148 * Private variables
149 */
150 static const char *config_keys[] =
151 {
152 "CacheFlush",
153 "Listen",
154 "Server",
155 "TimeToLive",
156 "Forward"
157 };
158 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
160 static int network_config_ttl = 0;
161 static int network_config_forward = 0;
163 static sockent_t *sending_sockets = NULL;
165 static receive_list_entry_t *receive_list_head = NULL;
166 static receive_list_entry_t *receive_list_tail = NULL;
167 static pthread_mutex_t receive_list_lock = PTHREAD_MUTEX_INITIALIZER;
168 static pthread_cond_t receive_list_cond = PTHREAD_COND_INITIALIZER;
170 static struct pollfd *listen_sockets = NULL;
171 static int listen_sockets_num = 0;
173 static int listen_loop = 0;
174 static pthread_t receive_thread_id = 0;
175 static pthread_t dispatch_thread_id = 0;
177 static char send_buffer[BUFF_SIZE];
178 static char *send_buffer_ptr;
179 static int send_buffer_fill;
180 static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
181 static char send_buffer_type[DATA_MAX_NAME_LEN];
182 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
184 static c_avl_tree_t *cache_tree = NULL;
185 static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER;
186 static time_t cache_flush_last;
187 static int cache_flush_interval = 1800;
189 /*
190 * Private functions
191 */
192 static int cache_flush (void)
193 {
194 char **keys = NULL;
195 int keys_num = 0;
197 char **tmp;
198 int i;
200 char *key;
201 time_t *value;
202 c_avl_iterator_t *iter;
204 time_t curtime = time (NULL);
206 iter = c_avl_get_iterator (cache_tree);
207 while (c_avl_iterator_next (iter, (void *) &key, (void *) &value) == 0)
208 {
209 if ((curtime - *value) <= cache_flush_interval)
210 continue;
211 tmp = (char **) realloc (keys,
212 (keys_num + 1) * sizeof (char *));
213 if (tmp == NULL)
214 {
215 sfree (keys);
216 c_avl_iterator_destroy (iter);
217 ERROR ("network plugin: cache_flush: realloc"
218 " failed.");
219 return (-1);
220 }
221 keys = tmp;
222 keys[keys_num] = key;
223 keys_num++;
224 } /* while (c_avl_iterator_next) */
225 c_avl_iterator_destroy (iter);
227 for (i = 0; i < keys_num; i++)
228 {
229 if (c_avl_remove (cache_tree, keys[i], (void *) &key,
230 (void *) &value) != 0)
231 {
232 WARNING ("network plugin: cache_flush: c_avl_remove"
233 " (%s) failed.", keys[i]);
234 continue;
235 }
237 sfree (key);
238 sfree (value);
239 }
241 sfree (keys);
243 DEBUG ("network plugin: cache_flush: Removed %i %s",
244 keys_num, (keys_num == 1) ? "entry" : "entries");
245 cache_flush_last = curtime;
246 return (0);
247 } /* int cache_flush */
249 static int cache_check (const char *type, const value_list_t *vl)
250 {
251 char key[1024];
252 time_t *value = NULL;
253 int retval = -1;
255 if (cache_tree == NULL)
256 return (-1);
258 if (format_name (key, sizeof (key), vl->host, vl->plugin,
259 vl->plugin_instance, type, vl->type_instance))
260 return (-1);
262 pthread_mutex_lock (&cache_lock);
264 if (c_avl_get (cache_tree, key, (void *) &value) == 0)
265 {
266 if (*value < vl->time)
267 {
268 *value = vl->time;
269 retval = 0;
270 }
271 else
272 {
273 DEBUG ("network plugin: cache_check: *value = %i >= vl->time = %i",
274 (int) *value, (int) vl->time);
275 retval = 1;
276 }
277 }
278 else
279 {
280 char *key_copy = strdup (key);
281 value = malloc (sizeof (time_t));
282 if ((key_copy != NULL) && (value != NULL))
283 {
284 *value = vl->time;
285 c_avl_insert (cache_tree, key_copy, value);
286 retval = 0;
287 }
288 else
289 {
290 sfree (key_copy);
291 sfree (value);
292 }
293 }
295 if ((time (NULL) - cache_flush_last) > cache_flush_interval)
296 cache_flush ();
298 pthread_mutex_unlock (&cache_lock);
300 DEBUG ("network plugin: cache_check: key = %s; time = %i; retval = %i",
301 key, (int) vl->time, retval);
303 return (retval);
304 } /* int cache_check */
306 static int write_part_values (char **ret_buffer, int *ret_buffer_len,
307 const data_set_t *ds, const value_list_t *vl)
308 {
309 char *packet_ptr;
310 int packet_len;
311 int num_values;
313 part_header_t pkg_ph;
314 uint16_t pkg_num_values;
315 uint8_t *pkg_values_types;
316 value_t *pkg_values;
318 int offset;
319 int i;
321 num_values = vl->values_len;
322 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
323 + (num_values * sizeof (uint8_t))
324 + (num_values * sizeof (value_t));
326 if (*ret_buffer_len < packet_len)
327 return (-1);
329 pkg_values_types = (uint8_t *) malloc (num_values * sizeof (uint8_t));
330 if (pkg_values_types == NULL)
331 {
332 ERROR ("network plugin: write_part_values: malloc failed.");
333 return (-1);
334 }
336 pkg_values = (value_t *) malloc (num_values * sizeof (value_t));
337 if (pkg_values == NULL)
338 {
339 free (pkg_values_types);
340 ERROR ("network plugin: write_part_values: malloc failed.");
341 return (-1);
342 }
344 pkg_ph.type = htons (TYPE_VALUES);
345 pkg_ph.length = htons (packet_len);
347 pkg_num_values = htons ((uint16_t) vl->values_len);
349 for (i = 0; i < num_values; i++)
350 {
351 if (ds->ds[i].type == DS_TYPE_COUNTER)
352 {
353 pkg_values_types[i] = DS_TYPE_COUNTER;
354 pkg_values[i].counter = htonll (vl->values[i].counter);
355 }
356 else
357 {
358 pkg_values_types[i] = DS_TYPE_GAUGE;
359 pkg_values[i].gauge = vl->values[i].gauge;
360 }
361 }
363 /*
364 * Use `memcpy' to write everything to the buffer, because the pointer
365 * may be unaligned and some architectures, such as SPARC, can't handle
366 * that.
367 */
368 packet_ptr = *ret_buffer;
369 offset = 0;
370 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
371 offset += sizeof (pkg_ph);
372 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
373 offset += sizeof (pkg_num_values);
374 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
375 offset += num_values * sizeof (uint8_t);
376 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
377 offset += num_values * sizeof (value_t);
379 assert (offset == packet_len);
381 *ret_buffer = packet_ptr + packet_len;
382 *ret_buffer_len -= packet_len;
384 free (pkg_values_types);
385 free (pkg_values);
387 return (0);
388 } /* int write_part_values */
390 static int write_part_number (char **ret_buffer, int *ret_buffer_len,
391 int type, uint64_t value)
392 {
393 char *packet_ptr;
394 int packet_len;
396 part_header_t pkg_head;
397 uint64_t pkg_value;
399 int offset;
401 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
403 if (*ret_buffer_len < packet_len)
404 return (-1);
406 pkg_head.type = htons (type);
407 pkg_head.length = htons (packet_len);
408 pkg_value = htonll (value);
410 packet_ptr = *ret_buffer;
411 offset = 0;
412 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
413 offset += sizeof (pkg_head);
414 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
415 offset += sizeof (pkg_value);
417 assert (offset == packet_len);
419 *ret_buffer = packet_ptr + packet_len;
420 *ret_buffer_len -= packet_len;
422 return (0);
423 } /* int write_part_number */
425 static int write_part_string (char **ret_buffer, int *ret_buffer_len,
426 int type, const char *str, int str_len)
427 {
428 char *packet_ptr;
429 int packet_len;
431 part_header_t pkg_head;
433 int offset;
435 packet_len = sizeof (pkg_head) + str_len + 1;
436 if (*ret_buffer_len < packet_len)
437 return (-1);
439 pkg_head.type = htons (type);
440 pkg_head.length = htons (packet_len);
442 packet_ptr = *ret_buffer;
443 offset = 0;
444 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
445 offset += sizeof (pkg_head);
446 memcpy (packet_ptr + offset, str, str_len);
447 offset += str_len;
448 memset (packet_ptr + offset, '\0', 1);
449 offset += 1;
451 assert (offset == packet_len);
453 *ret_buffer = packet_ptr + packet_len;
454 *ret_buffer_len -= packet_len;
456 return (0);
457 } /* int write_part_string */
459 static int parse_part_values (void **ret_buffer, int *ret_buffer_len,
460 value_t **ret_values, int *ret_num_values)
461 {
462 char *buffer = *ret_buffer;
463 int buffer_len = *ret_buffer_len;
464 part_values_t pv;
465 int i;
467 uint16_t h_length;
468 uint16_t h_type;
469 uint16_t h_num;
471 if (buffer_len < (15))
472 {
473 DEBUG ("network plugin: packet is too short: buffer_len = %i",
474 buffer_len);
475 return (-1);
476 }
478 pv.head = (part_header_t *) buffer;
479 h_length = ntohs (pv.head->length);
480 h_type = ntohs (pv.head->type);
482 assert (h_type == TYPE_VALUES);
484 pv.num_values = (uint16_t *) (pv.head + 1);
485 h_num = ntohs (*pv.num_values);
487 if (h_num != ((h_length - 6) / 9))
488 {
489 DEBUG ("`length' and `num of values' don't match");
490 return (-1);
491 }
493 pv.values_types = (uint8_t *) (pv.num_values + 1);
494 pv.values = (value_t *) (pv.values_types + h_num);
496 for (i = 0; i < h_num; i++)
497 if (pv.values_types[i] == DS_TYPE_COUNTER)
498 pv.values[i].counter = ntohll (pv.values[i].counter);
500 *ret_buffer = (void *) (pv.values + h_num);
501 *ret_buffer_len = buffer_len - h_length;
502 *ret_num_values = h_num;
503 *ret_values = pv.values;
505 return (0);
506 } /* int parse_part_values */
508 static int parse_part_number (void **ret_buffer, int *ret_buffer_len,
509 uint64_t *value)
510 {
511 part_number_t pn;
512 uint16_t len;
514 pn.head = (part_header_t *) *ret_buffer;
515 pn.value = (uint64_t *) (pn.head + 1);
517 len = ntohs (pn.head->length);
518 if (len != 12)
519 return (-1);
520 if (len > *ret_buffer_len)
521 return (-1);
522 *value = ntohll (*pn.value);
524 *ret_buffer = (void *) (pn.value + 1);
525 *ret_buffer_len -= len;
527 return (0);
528 } /* int parse_part_number */
530 static int parse_part_string (void **ret_buffer, int *ret_buffer_len,
531 char *output, int output_len)
532 {
533 char *buffer = *ret_buffer;
534 int buffer_len = *ret_buffer_len;
535 part_string_t ps;
537 uint16_t h_length;
538 uint16_t h_type;
540 DEBUG ("network plugin: parse_part_string: ret_buffer = %p;"
541 " ret_buffer_len = %i; output = %p; output_len = %i;",
542 *ret_buffer, *ret_buffer_len,
543 (void *) output, output_len);
545 ps.head = (part_header_t *) buffer;
547 h_length = ntohs (ps.head->length);
548 h_type = ntohs (ps.head->type);
550 DEBUG ("network plugin: parse_part_string: length = %hu; type = %hu;",
551 h_length, h_type);
553 if (buffer_len < h_length)
554 {
555 DEBUG ("packet is too short");
556 return (-1);
557 }
558 assert ((h_type == TYPE_HOST)
559 || (h_type == TYPE_PLUGIN)
560 || (h_type == TYPE_PLUGIN_INSTANCE)
561 || (h_type == TYPE_TYPE)
562 || (h_type == TYPE_TYPE_INSTANCE)
563 || (h_type == TYPE_MESSAGE));
565 ps.value = buffer + 4;
566 if (ps.value[h_length - 5] != '\0')
567 {
568 DEBUG ("String does not end with a nullbyte");
569 return (-1);
570 }
572 if (output_len < (h_length - 4))
573 {
574 DEBUG ("output buffer is too small");
575 return (-1);
576 }
577 strcpy (output, ps.value);
579 DEBUG ("network plugin: parse_part_string: output = %s", output);
581 *ret_buffer = (void *) (buffer + h_length);
582 *ret_buffer_len = buffer_len - h_length;
584 return (0);
585 } /* int parse_part_string */
587 static int parse_packet (void *buffer, int buffer_len)
588 {
589 part_header_t *header;
590 int status;
592 value_list_t vl = VALUE_LIST_INIT;
593 char type[DATA_MAX_NAME_LEN];
594 notification_t n;
596 DEBUG ("network plugin: parse_packet: buffer = %p; buffer_len = %i;",
597 buffer, buffer_len);
599 memset (&vl, '\0', sizeof (vl));
600 memset (&type, '\0', sizeof (type));
601 memset (&n, '\0', sizeof (n));
602 status = 0;
604 while ((status == 0) && (0 < buffer_len)
605 && ((unsigned int) buffer_len > sizeof (part_header_t)))
606 {
607 header = (part_header_t *) buffer;
609 if (ntohs (header->length) > buffer_len)
610 break;
611 /* Assure that this loop terminates eventually */
612 if (ntohs (header->length) < 4)
613 break;
615 if (ntohs (header->type) == TYPE_VALUES)
616 {
617 status = parse_part_values (&buffer, &buffer_len,
618 &vl.values, &vl.values_len);
620 if (status != 0)
621 {
622 DEBUG ("parse_part_values failed.");
623 break;
624 }
626 if ((vl.time > 0)
627 && (strlen (vl.host) > 0)
628 && (strlen (vl.plugin) > 0)
629 && (strlen (type) > 0)
630 && (cache_check (type, &vl) == 0))
631 {
632 DEBUG ("network plugin: parse_packet:"
633 " dispatching values");
634 plugin_dispatch_values (type, &vl);
635 }
636 else
637 {
638 DEBUG ("network plugin: parse_packet:"
639 " NOT dispatching values");
640 }
641 }
642 else if (ntohs (header->type) == TYPE_TIME)
643 {
644 uint64_t tmp = 0;
645 status = parse_part_number (&buffer, &buffer_len, &tmp);
646 if (status == 0)
647 {
648 vl.time = (time_t) tmp;
649 n.time = (time_t) tmp;
650 }
651 }
652 else if (ntohs (header->type) == TYPE_INTERVAL)
653 {
654 uint64_t tmp = 0;
655 status = parse_part_number (&buffer, &buffer_len, &tmp);
656 if (status == 0)
657 vl.interval = (int) tmp;
658 }
659 else if (ntohs (header->type) == TYPE_HOST)
660 {
661 status = parse_part_string (&buffer, &buffer_len,
662 vl.host, sizeof (vl.host));
663 strncpy (n.host, vl.host, sizeof (n.host));
664 n.host[sizeof (n.host) - 1] = '\0';
665 DEBUG ("network plugin: parse_packet: vl.host = %s",
666 vl.host);
667 }
668 else if (ntohs (header->type) == TYPE_PLUGIN)
669 {
670 status = parse_part_string (&buffer, &buffer_len,
671 vl.plugin, sizeof (vl.plugin));
672 strncpy (n.plugin, vl.plugin, sizeof (n.plugin));
673 n.plugin[sizeof (n.plugin) - 1] = '\0';
674 DEBUG ("network plugin: parse_packet: vl.plugin = %s",
675 vl.plugin);
676 }
677 else if (ntohs (header->type) == TYPE_PLUGIN_INSTANCE)
678 {
679 status = parse_part_string (&buffer, &buffer_len,
680 vl.plugin_instance,
681 sizeof (vl.plugin_instance));
682 strncpy (n.plugin_instance, vl.plugin_instance,
683 sizeof (n.plugin_instance));
684 n.plugin_instance[sizeof (n.plugin_instance) - 1] = '\0';
685 DEBUG ("network plugin: parse_packet: "
686 "vl.plugin_instance = %s",
687 vl.plugin_instance);
688 }
689 else if (ntohs (header->type) == TYPE_TYPE)
690 {
691 status = parse_part_string (&buffer, &buffer_len,
692 type, sizeof (type));
693 strncpy (n.type, type, sizeof (n.type));
694 n.type[sizeof (n.type) - 1] = '\0';
695 DEBUG ("network plugin: parse_packet: type = %s",
696 type);
697 }
698 else if (ntohs (header->type) == TYPE_TYPE_INSTANCE)
699 {
700 status = parse_part_string (&buffer, &buffer_len,
701 vl.type_instance,
702 sizeof (vl.type_instance));
703 strncpy (n.type_instance, vl.type_instance,
704 sizeof (n.type_instance));
705 n.type_instance[sizeof (n.type_instance) - 1] = '\0';
706 DEBUG ("network plugin: parse_packet: "
707 "vl.type_instance = %s",
708 vl.type_instance);
709 }
710 else if (ntohs (header->type) == TYPE_MESSAGE)
711 {
712 status = parse_part_string (&buffer, &buffer_len,
713 n.message, sizeof (n.message));
714 DEBUG ("network plugin: parse_packet: n.message = %s",
715 n.message);
717 if ((n.severity != NOTIF_FAILURE)
718 && (n.severity != NOTIF_WARNING)
719 && (n.severity != NOTIF_OKAY))
720 {
721 INFO ("network plugin: "
722 "Ignoring notification with "
723 "unknown severity %s.",
724 n.severity);
725 }
726 else if (n.time <= 0)
727 {
728 INFO ("network plugin: "
729 "Ignoring notification with "
730 "time == 0.");
731 }
732 else if (strlen (n.message) <= 0)
733 {
734 INFO ("network plugin: "
735 "Ignoring notification with "
736 "an empty message.");
737 }
738 else
739 {
740 /*
741 * TODO: Let this do a separate thread so that
742 * no packets are lost if this takes too long.
743 */
744 plugin_dispatch_notification (&n);
745 }
746 }
747 else if (ntohs (header->type) == TYPE_SEVERITY)
748 {
749 uint64_t tmp = 0;
750 status = parse_part_number (&buffer, &buffer_len, &tmp);
751 if (status == 0)
752 n.severity = (int) tmp;
753 }
754 else
755 {
756 DEBUG ("network plugin: parse_packet: Unknown part"
757 " type: 0x%0hx", ntohs (header->type));
758 buffer = ((char *) buffer) + ntohs (header->length);
759 }
760 } /* while (buffer_len > sizeof (part_header_t)) */
762 return (0);
763 } /* int parse_packet */
765 static void free_sockent (sockent_t *se)
766 {
767 sockent_t *next;
768 while (se != NULL)
769 {
770 next = se->next;
771 free (se->addr);
772 free (se);
773 se = next;
774 }
775 } /* void free_sockent */
777 /*
778 * int network_set_ttl
779 *
780 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
781 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
782 *
783 * The `struct addrinfo' is used to destinguish between unicast and multicast
784 * sockets.
785 */
786 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
787 {
788 if ((network_config_ttl < 1) || (network_config_ttl > 255))
789 return (-1);
791 DEBUG ("ttl = %i", network_config_ttl);
793 if (ai->ai_family == AF_INET)
794 {
795 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
796 int optname;
798 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
799 optname = IP_MULTICAST_TTL;
800 else
801 optname = IP_TTL;
803 if (setsockopt (se->fd, IPPROTO_IP, optname,
804 &network_config_ttl,
805 sizeof (network_config_ttl)) == -1)
806 {
807 char errbuf[1024];
808 ERROR ("setsockopt: %s",
809 sstrerror (errno, errbuf, sizeof (errbuf)));
810 return (-1);
811 }
812 }
813 else if (ai->ai_family == AF_INET6)
814 {
815 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
816 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
817 int optname;
819 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
820 optname = IPV6_MULTICAST_HOPS;
821 else
822 optname = IPV6_UNICAST_HOPS;
824 if (setsockopt (se->fd, IPPROTO_IPV6, optname,
825 &network_config_ttl,
826 sizeof (network_config_ttl)) == -1)
827 {
828 char errbuf[1024];
829 ERROR ("setsockopt: %s",
830 sstrerror (errno, errbuf,
831 sizeof (errbuf)));
832 return (-1);
833 }
834 }
836 return (0);
837 } /* int network_set_ttl */
839 static int network_bind_socket (const sockent_t *se, const struct addrinfo *ai)
840 {
841 int loop = 0;
842 int yes = 1;
844 /* allow multiple sockets to use the same PORT number */
845 if (setsockopt(se->fd, SOL_SOCKET, SO_REUSEADDR,
846 &yes, sizeof(yes)) == -1) {
847 char errbuf[1024];
848 ERROR ("setsockopt: %s",
849 sstrerror (errno, errbuf, sizeof (errbuf)));
850 return (-1);
851 }
853 DEBUG ("fd = %i; calling `bind'", se->fd);
855 if (bind (se->fd, ai->ai_addr, ai->ai_addrlen) == -1)
856 {
857 char errbuf[1024];
858 ERROR ("bind: %s",
859 sstrerror (errno, errbuf, sizeof (errbuf)));
860 return (-1);
861 }
863 if (ai->ai_family == AF_INET)
864 {
865 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
866 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
867 {
868 struct ip_mreq mreq;
870 DEBUG ("fd = %i; IPv4 multicast address found", se->fd);
872 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
873 mreq.imr_interface.s_addr = htonl (INADDR_ANY);
875 if (setsockopt (se->fd, IPPROTO_IP, IP_MULTICAST_LOOP,
876 &loop, sizeof (loop)) == -1)
877 {
878 char errbuf[1024];
879 ERROR ("setsockopt: %s",
880 sstrerror (errno, errbuf,
881 sizeof (errbuf)));
882 return (-1);
883 }
885 if (setsockopt (se->fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
886 &mreq, sizeof (mreq)) == -1)
887 {
888 char errbuf[1024];
889 ERROR ("setsockopt: %s",
890 sstrerror (errno, errbuf,
891 sizeof (errbuf)));
892 return (-1);
893 }
894 }
895 }
896 else if (ai->ai_family == AF_INET6)
897 {
898 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
899 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
900 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
901 {
902 struct ipv6_mreq mreq;
904 DEBUG ("fd = %i; IPv6 multicast address found", se->fd);
906 memcpy (&mreq.ipv6mr_multiaddr,
907 &addr->sin6_addr,
908 sizeof (addr->sin6_addr));
910 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
911 * ipv6mr_interface may be set to zeroes to
912 * choose the default multicast interface or to
913 * the index of a particular multicast-capable
914 * interface if the host is multihomed.
915 * Membership is associ-associated with a
916 * single interface; programs running on
917 * multihomed hosts may need to join the same
918 * group on more than one interface.*/
919 mreq.ipv6mr_interface = 0;
921 if (setsockopt (se->fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
922 &loop, sizeof (loop)) == -1)
923 {
924 char errbuf[1024];
925 ERROR ("setsockopt: %s",
926 sstrerror (errno, errbuf,
927 sizeof (errbuf)));
928 return (-1);
929 }
931 if (setsockopt (se->fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
932 &mreq, sizeof (mreq)) == -1)
933 {
934 char errbuf[1024];
935 ERROR ("setsockopt: %s",
936 sstrerror (errno, errbuf,
937 sizeof (errbuf)));
938 return (-1);
939 }
940 }
941 }
943 return (0);
944 } /* int network_bind_socket */
946 static sockent_t *network_create_socket (const char *node,
947 const char *service,
948 int listen)
949 {
950 struct addrinfo ai_hints;
951 struct addrinfo *ai_list, *ai_ptr;
952 int ai_return;
954 sockent_t *se_head = NULL;
955 sockent_t *se_tail = NULL;
957 DEBUG ("node = %s, service = %s", node, service);
959 memset (&ai_hints, '\0', sizeof (ai_hints));
960 ai_hints.ai_flags = 0;
961 #ifdef AI_PASSIVE
962 ai_hints.ai_flags |= AI_PASSIVE;
963 #endif
964 #ifdef AI_ADDRCONFIG
965 ai_hints.ai_flags |= AI_ADDRCONFIG;
966 #endif
967 ai_hints.ai_family = AF_UNSPEC;
968 ai_hints.ai_socktype = SOCK_DGRAM;
969 ai_hints.ai_protocol = IPPROTO_UDP;
971 ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
972 if (ai_return != 0)
973 {
974 char errbuf[1024];
975 ERROR ("getaddrinfo (%s, %s): %s",
976 (node == NULL) ? "(null)" : node,
977 (service == NULL) ? "(null)" : service,
978 (ai_return == EAI_SYSTEM)
979 ? sstrerror (errno, errbuf, sizeof (errbuf))
980 : gai_strerror (ai_return));
981 return (NULL);
982 }
984 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
985 {
986 sockent_t *se;
988 if ((se = (sockent_t *) malloc (sizeof (sockent_t))) == NULL)
989 {
990 char errbuf[1024];
991 ERROR ("malloc: %s",
992 sstrerror (errno, errbuf,
993 sizeof (errbuf)));
994 continue;
995 }
997 if ((se->addr = (struct sockaddr_storage *) malloc (sizeof (struct sockaddr_storage))) == NULL)
998 {
999 char errbuf[1024];
1000 ERROR ("malloc: %s",
1001 sstrerror (errno, errbuf,
1002 sizeof (errbuf)));
1003 free (se);
1004 continue;
1005 }
1007 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1008 memset (se->addr, '\0', sizeof (struct sockaddr_storage));
1009 memcpy (se->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1010 se->addrlen = ai_ptr->ai_addrlen;
1012 se->fd = socket (ai_ptr->ai_family,
1013 ai_ptr->ai_socktype,
1014 ai_ptr->ai_protocol);
1015 se->next = NULL;
1017 if (se->fd == -1)
1018 {
1019 char errbuf[1024];
1020 ERROR ("socket: %s",
1021 sstrerror (errno, errbuf,
1022 sizeof (errbuf)));
1023 free (se->addr);
1024 free (se);
1025 continue;
1026 }
1028 if (listen != 0)
1029 {
1030 if (network_bind_socket (se, ai_ptr) != 0)
1031 {
1032 close (se->fd);
1033 free (se->addr);
1034 free (se);
1035 continue;
1036 }
1037 }
1038 else /* listen == 0 */
1039 {
1040 network_set_ttl (se, ai_ptr);
1041 }
1043 if (se_tail == NULL)
1044 {
1045 se_head = se;
1046 se_tail = se;
1047 }
1048 else
1049 {
1050 se_tail->next = se;
1051 se_tail = se;
1052 }
1054 /* We don't open more than one write-socket per node/service pair.. */
1055 if (listen == 0)
1056 break;
1057 }
1059 freeaddrinfo (ai_list);
1061 return (se_head);
1062 } /* sockent_t *network_create_socket */
1064 static sockent_t *network_create_default_socket (int listen)
1065 {
1066 sockent_t *se_ptr = NULL;
1067 sockent_t *se_head = NULL;
1068 sockent_t *se_tail = NULL;
1070 se_ptr = network_create_socket (NET_DEFAULT_V6_ADDR,
1071 NET_DEFAULT_PORT, listen);
1073 /* Don't send to the same machine in IPv6 and IPv4 if both are available. */
1074 if ((listen == 0) && (se_ptr != NULL))
1075 return (se_ptr);
1077 if (se_ptr != NULL)
1078 {
1079 se_head = se_ptr;
1080 se_tail = se_ptr;
1081 while (se_tail->next != NULL)
1082 se_tail = se_tail->next;
1083 }
1085 se_ptr = network_create_socket (NET_DEFAULT_V4_ADDR, NET_DEFAULT_PORT, listen);
1087 if (se_tail == NULL)
1088 return (se_ptr);
1090 se_tail->next = se_ptr;
1091 return (se_head);
1092 } /* sockent_t *network_create_default_socket */
1094 static int network_add_listen_socket (const char *node, const char *service)
1095 {
1096 sockent_t *se;
1097 sockent_t *se_ptr;
1098 int se_num = 0;
1100 if (service == NULL)
1101 service = NET_DEFAULT_PORT;
1103 if (node == NULL)
1104 se = network_create_default_socket (1 /* listen == true */);
1105 else
1106 se = network_create_socket (node, service, 1 /* listen == true */);
1108 if (se == NULL)
1109 return (-1);
1111 for (se_ptr = se; se_ptr != NULL; se_ptr = se_ptr->next)
1112 se_num++;
1114 listen_sockets = (struct pollfd *) realloc (listen_sockets,
1115 (listen_sockets_num + se_num)
1116 * sizeof (struct pollfd));
1118 for (se_ptr = se; se_ptr != NULL; se_ptr = se_ptr->next)
1119 {
1120 listen_sockets[listen_sockets_num].fd = se_ptr->fd;
1121 listen_sockets[listen_sockets_num].events = POLLIN | POLLPRI;
1122 listen_sockets[listen_sockets_num].revents = 0;
1123 listen_sockets_num++;
1124 } /* for (se) */
1126 free_sockent (se);
1127 return (0);
1128 } /* int network_add_listen_socket */
1130 static int network_add_sending_socket (const char *node, const char *service)
1131 {
1132 sockent_t *se;
1133 sockent_t *se_ptr;
1135 if (service == NULL)
1136 service = NET_DEFAULT_PORT;
1138 if (node == NULL)
1139 se = network_create_default_socket (0 /* listen == false */);
1140 else
1141 se = network_create_socket (node, service, 0 /* listen == false */);
1143 if (se == NULL)
1144 return (-1);
1146 if (sending_sockets == NULL)
1147 {
1148 sending_sockets = se;
1149 return (0);
1150 }
1152 for (se_ptr = sending_sockets; se_ptr->next != NULL; se_ptr = se_ptr->next)
1153 /* seek end */;
1155 se_ptr->next = se;
1156 return (0);
1157 } /* int network_get_listen_socket */
1159 static void *dispatch_thread (void *arg)
1160 {
1161 while (42)
1162 {
1163 receive_list_entry_t *ent;
1165 /* Lock and wait for more data to come in */
1166 pthread_mutex_lock (&receive_list_lock);
1167 while ((listen_loop == 0)
1168 && (receive_list_head == NULL))
1169 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
1171 /* Remove the head entry and unlock */
1172 ent = receive_list_head;
1173 if (ent != NULL)
1174 receive_list_head = ent->next;
1175 pthread_mutex_unlock (&receive_list_lock);
1177 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
1178 * because we dispatch all missing packets before shutting down. */
1179 if (ent == NULL)
1180 break;
1182 parse_packet (ent->data, ent->data_len);
1184 sfree (ent);
1185 } /* while (42) */
1187 return (NULL);
1188 } /* void *receive_thread */
1190 static int network_receive (void)
1191 {
1192 char buffer[BUFF_SIZE];
1193 int buffer_len;
1195 int i;
1196 int status;
1198 if (listen_sockets_num == 0)
1199 network_add_listen_socket (NULL, NULL);
1201 if (listen_sockets_num == 0)
1202 {
1203 ERROR ("network: Failed to open a listening socket.");
1204 return (-1);
1205 }
1207 while (listen_loop == 0)
1208 {
1209 status = poll (listen_sockets, listen_sockets_num, -1);
1211 if (status <= 0)
1212 {
1213 char errbuf[1024];
1214 if (errno == EINTR)
1215 continue;
1216 ERROR ("poll failed: %s",
1217 sstrerror (errno, errbuf, sizeof (errbuf)));
1218 return (-1);
1219 }
1221 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
1222 {
1223 receive_list_entry_t *ent;
1225 if ((listen_sockets[i].revents & (POLLIN | POLLPRI)) == 0)
1226 continue;
1227 status--;
1229 buffer_len = recv (listen_sockets[i].fd,
1230 buffer, sizeof (buffer),
1231 0 /* no flags */);
1232 if (buffer_len < 0)
1233 {
1234 char errbuf[1024];
1235 ERROR ("recv failed: %s",
1236 sstrerror (errno, errbuf,
1237 sizeof (errbuf)));
1238 return (-1);
1239 }
1241 ent = malloc (sizeof (receive_list_entry_t));
1242 if (ent == NULL)
1243 {
1244 ERROR ("network plugin: malloc failed.");
1245 return (-1);
1246 }
1247 memset (ent, '\0', sizeof (receive_list_entry_t));
1249 /* Hopefully this be optimized out by the compiler. It
1250 * might help prevent stupid bugs in the future though.
1251 */
1252 assert (sizeof (ent->data) == sizeof (buffer));
1254 memcpy (ent->data, buffer, buffer_len);
1255 ent->data_len = buffer_len;
1257 pthread_mutex_lock (&receive_list_lock);
1258 if (receive_list_head == NULL)
1259 {
1260 receive_list_head = ent;
1261 receive_list_tail = ent;
1262 }
1263 else
1264 {
1265 receive_list_tail->next = ent;
1266 receive_list_tail = ent;
1267 }
1268 pthread_cond_signal (&receive_list_cond);
1269 pthread_mutex_unlock (&receive_list_lock);
1270 } /* for (listen_sockets) */
1271 } /* while (listen_loop == 0) */
1273 return (0);
1274 }
1276 static void *receive_thread (void *arg)
1277 {
1278 return (network_receive () ? (void *) 1 : (void *) 0);
1279 } /* void *receive_thread */
1281 static void network_send_buffer (const char *buffer, int buffer_len)
1282 {
1283 sockent_t *se;
1284 int status;
1286 DEBUG ("network plugin: network_send_buffer: buffer_len = %i", buffer_len);
1288 for (se = sending_sockets; se != NULL; se = se->next)
1289 {
1290 while (42)
1291 {
1292 status = sendto (se->fd, buffer, buffer_len, 0 /* no flags */,
1293 (struct sockaddr *) se->addr, se->addrlen);
1294 if (status < 0)
1295 {
1296 char errbuf[1024];
1297 if (errno == EINTR)
1298 continue;
1299 ERROR ("network plugin: sendto failed: %s",
1300 sstrerror (errno, errbuf,
1301 sizeof (errbuf)));
1302 break;
1303 }
1305 break;
1306 } /* while (42) */
1307 } /* for (sending_sockets) */
1308 } /* void network_send_buffer */
1310 static int add_to_buffer (char *buffer, int buffer_size,
1311 value_list_t *vl_def, char *type_def,
1312 const data_set_t *ds, const value_list_t *vl)
1313 {
1314 char *buffer_orig = buffer;
1316 if (strcmp (vl_def->host, vl->host) != 0)
1317 {
1318 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
1319 vl->host, strlen (vl->host)) != 0)
1320 return (-1);
1321 strcpy (vl_def->host, vl->host);
1322 }
1324 if (vl_def->time != vl->time)
1325 {
1326 if (write_part_number (&buffer, &buffer_size, TYPE_TIME,
1327 (uint64_t) vl->time))
1328 return (-1);
1329 vl_def->time = vl->time;
1330 }
1332 if (vl_def->interval != vl->interval)
1333 {
1334 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL,
1335 (uint64_t) vl->interval))
1336 return (-1);
1337 vl_def->interval = vl->interval;
1338 }
1340 if (strcmp (vl_def->plugin, vl->plugin) != 0)
1341 {
1342 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
1343 vl->plugin, strlen (vl->plugin)) != 0)
1344 return (-1);
1345 strcpy (vl_def->plugin, vl->plugin);
1346 }
1348 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
1349 {
1350 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
1351 vl->plugin_instance,
1352 strlen (vl->plugin_instance)) != 0)
1353 return (-1);
1354 strcpy (vl_def->plugin_instance, vl->plugin_instance);
1355 }
1357 if (strcmp (type_def, ds->type) != 0)
1358 {
1359 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
1360 ds->type, strlen (ds->type)) != 0)
1361 return (-1);
1362 strcpy (type_def, ds->type);
1363 }
1365 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
1366 {
1367 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
1368 vl->type_instance,
1369 strlen (vl->type_instance)) != 0)
1370 return (-1);
1371 strcpy (vl_def->type_instance, vl->type_instance);
1372 }
1374 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
1375 return (-1);
1377 return (buffer - buffer_orig);
1378 } /* int add_to_buffer */
1380 static void flush_buffer (void)
1381 {
1382 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
1383 send_buffer_fill);
1385 network_send_buffer (send_buffer, send_buffer_fill);
1386 send_buffer_ptr = send_buffer;
1387 send_buffer_fill = 0;
1388 memset (&send_buffer_vl, '\0', sizeof (send_buffer_vl));
1389 memset (send_buffer_type, '\0', sizeof (send_buffer_type));
1390 }
1392 static int network_write (const data_set_t *ds, const value_list_t *vl)
1393 {
1394 int status;
1396 /* If the value is already in the cache, we have received it via the
1397 * network. We write it again if forwarding is activated. It's then in
1398 * the cache and should we receive it again we will ignore it. */
1399 status = cache_check (ds->type, vl);
1400 if ((network_config_forward == 0)
1401 && (status != 0))
1402 return (0);
1404 pthread_mutex_lock (&send_buffer_lock);
1406 status = add_to_buffer (send_buffer_ptr,
1407 sizeof (send_buffer) - send_buffer_fill,
1408 &send_buffer_vl, send_buffer_type,
1409 ds, vl);
1410 if (status >= 0)
1411 {
1412 /* status == bytes added to the buffer */
1413 send_buffer_fill += status;
1414 send_buffer_ptr += status;
1415 }
1416 else
1417 {
1418 flush_buffer ();
1420 status = add_to_buffer (send_buffer_ptr,
1421 sizeof (send_buffer) - send_buffer_fill,
1422 &send_buffer_vl, send_buffer_type,
1423 ds, vl);
1425 if (status >= 0)
1426 {
1427 send_buffer_fill += status;
1428 send_buffer_ptr += status;
1429 }
1430 }
1432 if (status < 0)
1433 {
1434 ERROR ("network plugin: Unable to append to the "
1435 "buffer for some weird reason");
1436 }
1437 else if ((sizeof (send_buffer) - send_buffer_fill) < 15)
1438 {
1439 flush_buffer ();
1440 }
1442 pthread_mutex_unlock (&send_buffer_lock);
1444 return ((status < 0) ? -1 : 0);
1445 } /* int network_write */
1447 static int network_config (const char *key, const char *val)
1448 {
1449 char *node;
1450 char *service;
1452 char *fields[3];
1453 int fields_num;
1455 if ((strcasecmp ("Listen", key) == 0)
1456 || (strcasecmp ("Server", key) == 0))
1457 {
1458 char *val_cpy = strdup (val);
1459 if (val_cpy == NULL)
1460 return (1);
1462 service = NET_DEFAULT_PORT;
1463 fields_num = strsplit (val_cpy, fields, 3);
1464 if ((fields_num != 1)
1465 && (fields_num != 2))
1466 return (1);
1467 else if (fields_num == 2)
1468 {
1469 if ((service = strchr (fields[1], '.')) != NULL)
1470 *service = '\0';
1471 service = fields[1];
1472 }
1473 node = fields[0];
1475 if (strcasecmp ("Listen", key) == 0)
1476 network_add_listen_socket (node, service);
1477 else
1478 network_add_sending_socket (node, service);
1479 }
1480 else if (strcasecmp ("TimeToLive", key) == 0)
1481 {
1482 int tmp = atoi (val);
1483 if ((tmp > 0) && (tmp < 256))
1484 network_config_ttl = tmp;
1485 else
1486 return (1);
1487 }
1488 else if (strcasecmp ("Forward", key) == 0)
1489 {
1490 if ((strcasecmp ("true", val) == 0)
1491 || (strcasecmp ("yes", val) == 0)
1492 || (strcasecmp ("on", val) == 0))
1493 network_config_forward = 1;
1494 else
1495 network_config_forward = 0;
1496 }
1497 else if (strcasecmp ("CacheFlush", key) == 0)
1498 {
1499 int tmp = atoi (val);
1500 if (tmp > 0)
1501 cache_flush_interval = tmp;
1502 else return (1);
1503 }
1504 else
1505 {
1506 return (-1);
1507 }
1508 return (0);
1509 } /* int network_config */
1511 static int network_notification (const notification_t *n)
1512 {
1513 char buffer[BUFF_SIZE];
1514 char *buffer_ptr = buffer;
1515 int buffer_free = sizeof (buffer);
1516 int status;
1518 memset (buffer, '\0', sizeof (buffer));
1521 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME,
1522 (uint64_t) n->time);
1523 if (status != 0)
1524 return (-1);
1526 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
1527 (uint64_t) n->severity);
1528 if (status != 0)
1529 return (-1);
1531 if (strlen (n->host) > 0)
1532 {
1533 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
1534 n->host, strlen (n->host));
1535 if (status != 0)
1536 return (-1);
1537 }
1539 if (strlen (n->plugin) > 0)
1540 {
1541 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
1542 n->plugin, strlen (n->plugin));
1543 if (status != 0)
1544 return (-1);
1545 }
1547 if (strlen (n->plugin_instance) > 0)
1548 {
1549 status = write_part_string (&buffer_ptr, &buffer_free,
1550 TYPE_PLUGIN_INSTANCE,
1551 n->plugin_instance, strlen (n->plugin_instance));
1552 if (status != 0)
1553 return (-1);
1554 }
1556 if (strlen (n->type) > 0)
1557 {
1558 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
1559 n->type, strlen (n->type));
1560 if (status != 0)
1561 return (-1);
1562 }
1564 if (strlen (n->type_instance) > 0)
1565 {
1566 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
1567 n->type_instance, strlen (n->type_instance));
1568 if (status != 0)
1569 return (-1);
1570 }
1572 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
1573 n->message, strlen (n->message));
1574 if (status != 0)
1575 return (-1);
1577 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
1579 return (0);
1580 } /* int network_notification */
1582 static int network_shutdown (void)
1583 {
1584 listen_loop++;
1586 /* Kill the listening thread */
1587 if (receive_thread_id != (pthread_t) 0)
1588 {
1589 pthread_kill (receive_thread_id, SIGTERM);
1590 pthread_join (receive_thread_id, NULL /* no return value */);
1591 receive_thread_id = (pthread_t) 0;
1592 }
1594 /* Shutdown the dispatching thread */
1595 if (dispatch_thread_id != (pthread_t) 0)
1596 pthread_cond_broadcast (&receive_list_cond);
1598 if (send_buffer_fill > 0)
1599 flush_buffer ();
1601 if (cache_tree != NULL)
1602 {
1603 void *key;
1604 void *value;
1606 while (c_avl_pick (cache_tree, &key, &value) == 0)
1607 {
1608 sfree (key);
1609 sfree (value);
1610 }
1611 c_avl_destroy (cache_tree);
1612 cache_tree = NULL;
1613 }
1615 /* TODO: Close `sending_sockets' */
1617 plugin_unregister_config ("network");
1618 plugin_unregister_init ("network");
1619 plugin_unregister_write ("network");
1620 plugin_unregister_shutdown ("network");
1622 return (0);
1623 } /* int network_shutdown */
1625 static int network_init (void)
1626 {
1627 plugin_register_shutdown ("network", network_shutdown);
1629 send_buffer_ptr = send_buffer;
1630 send_buffer_fill = 0;
1631 memset (&send_buffer_vl, '\0', sizeof (send_buffer_vl));
1632 memset (send_buffer_type, '\0', sizeof (send_buffer_type));
1634 cache_tree = c_avl_create ((int (*) (const void *, const void *)) strcmp);
1635 cache_flush_last = time (NULL);
1637 /* setup socket(s) and so on */
1638 if (sending_sockets != NULL)
1639 {
1640 plugin_register_write ("network", network_write);
1641 plugin_register_notification ("network", network_notification);
1642 }
1644 if ((listen_sockets_num != 0) && (receive_thread_id == 0))
1645 {
1646 int status;
1648 status = pthread_create (&dispatch_thread_id,
1649 NULL /* no attributes */,
1650 dispatch_thread,
1651 NULL /* no argument */);
1652 if (status != 0)
1653 {
1654 char errbuf[1024];
1655 ERROR ("network: pthread_create failed: %s",
1656 sstrerror (errno, errbuf,
1657 sizeof (errbuf)));
1658 }
1660 status = pthread_create (&receive_thread_id,
1661 NULL /* no attributes */,
1662 receive_thread,
1663 NULL /* no argument */);
1664 if (status != 0)
1665 {
1666 char errbuf[1024];
1667 ERROR ("network: pthread_create failed: %s",
1668 sstrerror (errno, errbuf,
1669 sizeof (errbuf)));
1670 }
1671 }
1672 return (0);
1673 } /* int network_init */
1675 void module_register (void)
1676 {
1677 plugin_register_config ("network", network_config,
1678 config_keys, config_keys_num);
1679 plugin_register_init ("network", network_init);
1680 } /* void module_register */