1 /**
2 * collectd - src/network.c
3 * Copyright (C) 2005-2013 Florian octo Forster
4 * Copyright (C) 2009 Aman Gupta
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU Lesser General Public License as published by
8 * the Free Software Foundation; only version 2.1 of the License is
9 * applicable.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 * Authors:
21 * Florian octo Forster <octo at collectd.org>
22 * Aman Gupta <aman at tmm1.net>
23 **/
25 #define _BSD_SOURCE /* For struct ip_mreq */
27 #include "collectd.h"
28 #include "plugin.h"
29 #include "common.h"
30 #include "configfile.h"
31 #include "utils_fbhash.h"
32 #include "utils_avltree.h"
33 #include "utils_cache.h"
34 #include "utils_complain.h"
36 #include "network.h"
38 #if HAVE_PTHREAD_H
39 # include <pthread.h>
40 #endif
41 #if HAVE_SYS_SOCKET_H
42 # include <sys/socket.h>
43 #endif
44 #if HAVE_NETDB_H
45 # include <netdb.h>
46 #endif
47 #if HAVE_NETINET_IN_H
48 # include <netinet/in.h>
49 #endif
50 #if HAVE_ARPA_INET_H
51 # include <arpa/inet.h>
52 #endif
53 #if HAVE_POLL_H
54 # include <poll.h>
55 #endif
56 #if HAVE_NET_IF_H
57 # include <net/if.h>
58 #endif
60 #if HAVE_LIBGCRYPT
61 # include <pthread.h>
62 # if defined __APPLE__
63 /* default xcode compiler throws warnings even when deprecated functionality
64 * is not used. -Werror breaks the build because of erroneous warnings.
65 * http://stackoverflow.com/questions/10556299/compiler-warnings-with-libgcrypt-v1-5-0/12830209#12830209
66 */
67 # pragma GCC diagnostic ignored "-Wdeprecated-declarations"
68 # endif
69 /* FreeBSD's copy of libgcrypt extends the existing GCRYPT_NO_DEPRECATED
70 * to properly hide all deprecated functionality.
71 * http://svnweb.freebsd.org/ports/head/security/libgcrypt/files/patch-src__gcrypt.h.in
72 */
73 # define GCRYPT_NO_DEPRECATED
74 # include <gcrypt.h>
75 # if defined __APPLE__
76 /* Re enable deprecation warnings */
77 # pragma GCC diagnostic warning "-Wdeprecated-declarations"
78 # endif
79 GCRY_THREAD_OPTION_PTHREAD_IMPL;
80 #endif
82 #ifndef IPV6_ADD_MEMBERSHIP
83 # ifdef IPV6_JOIN_GROUP
84 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
85 # else
86 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
87 # endif
88 #endif /* !IP_ADD_MEMBERSHIP */
90 /*
91 * Maximum size required for encryption / signing:
92 *
93 * 42 bytes for the encryption header
94 * + 64 bytes for the username
95 * -----------
96 * = 106 bytes
97 */
98 #define BUFF_SIG_SIZE 106
100 /*
101 * Private data types
102 */
103 #define SECURITY_LEVEL_NONE 0
104 #if HAVE_LIBGCRYPT
105 # define SECURITY_LEVEL_SIGN 1
106 # define SECURITY_LEVEL_ENCRYPT 2
107 #endif
108 struct sockent_client
109 {
110 int fd;
111 struct sockaddr_storage *addr;
112 socklen_t addrlen;
113 #if HAVE_LIBGCRYPT
114 int security_level;
115 char *username;
116 char *password;
117 gcry_cipher_hd_t cypher;
118 unsigned char password_hash[32];
119 #endif
120 };
122 struct sockent_server
123 {
124 int *fd;
125 size_t fd_num;
126 #if HAVE_LIBGCRYPT
127 int security_level;
128 char *auth_file;
129 fbhash_t *userdb;
130 gcry_cipher_hd_t cypher;
131 #endif
132 };
134 typedef struct sockent
135 {
136 #define SOCKENT_TYPE_CLIENT 1
137 #define SOCKENT_TYPE_SERVER 2
138 int type;
140 char *node;
141 char *service;
142 int interface;
144 union
145 {
146 struct sockent_client client;
147 struct sockent_server server;
148 } data;
150 struct sockent *next;
151 } sockent_t;
153 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
154 * 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
155 * +-------+-----------------------+-------------------------------+
156 * ! Ver. ! ! Length !
157 * +-------+-----------------------+-------------------------------+
158 */
159 struct part_header_s
160 {
161 uint16_t type;
162 uint16_t length;
163 };
164 typedef struct part_header_s part_header_t;
166 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
167 * 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
168 * +-------------------------------+-------------------------------+
169 * ! Type ! Length !
170 * +-------------------------------+-------------------------------+
171 * : (Length - 4) Bytes :
172 * +---------------------------------------------------------------+
173 */
174 struct part_string_s
175 {
176 part_header_t *head;
177 char *value;
178 };
179 typedef struct part_string_s part_string_t;
181 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
182 * 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
183 * +-------------------------------+-------------------------------+
184 * ! Type ! Length !
185 * +-------------------------------+-------------------------------+
186 * : (Length - 4 == 2 || 4 || 8) Bytes :
187 * +---------------------------------------------------------------+
188 */
189 struct part_number_s
190 {
191 part_header_t *head;
192 uint64_t *value;
193 };
194 typedef struct part_number_s part_number_t;
196 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
197 * 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
198 * +-------------------------------+-------------------------------+
199 * ! Type ! Length !
200 * +-------------------------------+---------------+---------------+
201 * ! Num of values ! Type0 ! Type1 !
202 * +-------------------------------+---------------+---------------+
203 * ! Value0 !
204 * ! !
205 * +---------------------------------------------------------------+
206 * ! Value1 !
207 * ! !
208 * +---------------------------------------------------------------+
209 */
210 struct part_values_s
211 {
212 part_header_t *head;
213 uint16_t *num_values;
214 uint8_t *values_types;
215 value_t *values;
216 };
217 typedef struct part_values_s part_values_t;
219 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
220 * 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
221 * +-------------------------------+-------------------------------+
222 * ! Type ! Length !
223 * +-------------------------------+-------------------------------+
224 * ! Hash (Bits 0 - 31) !
225 * : : :
226 * ! Hash (Bits 224 - 255) !
227 * +---------------------------------------------------------------+
228 */
229 /* Minimum size */
230 #define PART_SIGNATURE_SHA256_SIZE 36
231 struct part_signature_sha256_s
232 {
233 part_header_t head;
234 unsigned char hash[32];
235 char *username;
236 };
237 typedef struct part_signature_sha256_s part_signature_sha256_t;
239 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
240 * 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
241 * +-------------------------------+-------------------------------+
242 * ! Type ! Length !
243 * +-------------------------------+-------------------------------+
244 * ! Original length ! Padding (0 - 15 bytes) !
245 * +-------------------------------+-------------------------------+
246 * ! Hash (Bits 0 - 31) !
247 * : : :
248 * ! Hash (Bits 128 - 159) !
249 * +---------------------------------------------------------------+
250 */
251 /* Minimum size */
252 #define PART_ENCRYPTION_AES256_SIZE 42
253 struct part_encryption_aes256_s
254 {
255 part_header_t head;
256 uint16_t username_length;
257 char *username;
258 unsigned char iv[16];
259 /* <encrypted> */
260 unsigned char hash[20];
261 /* <payload /> */
262 /* </encrypted> */
263 };
264 typedef struct part_encryption_aes256_s part_encryption_aes256_t;
266 struct receive_list_entry_s
267 {
268 char *data;
269 int data_len;
270 int fd;
271 struct receive_list_entry_s *next;
272 };
273 typedef struct receive_list_entry_s receive_list_entry_t;
275 /*
276 * Private variables
277 */
278 static int network_config_ttl = 0;
279 /* Ethernet - (IPv6 + UDP) = 1500 - (40 + 8) = 1452 */
280 static size_t network_config_packet_size = 1452;
281 static int network_config_forward = 0;
282 static int network_config_stats = 0;
284 static sockent_t *sending_sockets = NULL;
286 static receive_list_entry_t *receive_list_head = NULL;
287 static receive_list_entry_t *receive_list_tail = NULL;
288 static pthread_mutex_t receive_list_lock = PTHREAD_MUTEX_INITIALIZER;
289 static pthread_cond_t receive_list_cond = PTHREAD_COND_INITIALIZER;
290 static uint64_t receive_list_length = 0;
292 static sockent_t *listen_sockets = NULL;
293 static struct pollfd *listen_sockets_pollfd = NULL;
294 static size_t listen_sockets_num = 0;
296 /* The receive and dispatch threads will run as long as `listen_loop' is set to
297 * zero. */
298 static int listen_loop = 0;
299 static int receive_thread_running = 0;
300 static pthread_t receive_thread_id;
301 static int dispatch_thread_running = 0;
302 static pthread_t dispatch_thread_id;
304 /* Buffer in which to-be-sent network packets are constructed. */
305 static char *send_buffer;
306 static char *send_buffer_ptr;
307 static int send_buffer_fill;
308 static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
309 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
311 /* XXX: These counters are incremented from one place only. The spot in which
312 * the values are incremented is either only reachable by one thread (the
313 * dispatch thread, for example) or locked by some lock (send_buffer_lock for
314 * example). Only if neither is true, the stats_lock is acquired. The counters
315 * are always read without holding a lock in the hope that writing 8 bytes to
316 * memory is an atomic operation. */
317 static derive_t stats_octets_rx = 0;
318 static derive_t stats_octets_tx = 0;
319 static derive_t stats_packets_rx = 0;
320 static derive_t stats_packets_tx = 0;
321 static derive_t stats_values_dispatched = 0;
322 static derive_t stats_values_not_dispatched = 0;
323 static derive_t stats_values_sent = 0;
324 static derive_t stats_values_not_sent = 0;
325 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
327 /*
328 * Private functions
329 */
330 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
331 {
332 uint64_t time_sent = 0;
333 int status;
335 status = uc_meta_data_get_unsigned_int (vl,
336 "network:time_sent", &time_sent);
338 /* This is a value we already sent. Don't allow it to be received again in
339 * order to avoid looping. */
340 if ((status == 0) && (time_sent >= ((uint64_t) vl->time)))
341 return (0);
343 return (1);
344 } /* }}} _Bool check_receive_okay */
346 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
347 {
348 _Bool received = 0;
349 int status;
351 if (network_config_forward != 0)
352 return (1);
354 if (vl->meta == NULL)
355 return (1);
357 status = meta_data_get_boolean (vl->meta, "network:received", &received);
358 if (status == -ENOENT)
359 return (1);
360 else if (status != 0)
361 {
362 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
363 "with status %i.", status);
364 return (1);
365 }
367 /* By default, only *send* value lists that were not *received* by the
368 * network plugin. */
369 return (!received);
370 } /* }}} _Bool check_send_okay */
372 static _Bool check_notify_received (const notification_t *n) /* {{{ */
373 {
374 notification_meta_t *ptr;
376 for (ptr = n->meta; ptr != NULL; ptr = ptr->next)
377 if ((strcmp ("network:received", ptr->name) == 0)
378 && (ptr->type == NM_TYPE_BOOLEAN))
379 return ((_Bool) ptr->nm_value.nm_boolean);
381 return (0);
382 } /* }}} _Bool check_notify_received */
384 static _Bool check_send_notify_okay (const notification_t *n) /* {{{ */
385 {
386 static c_complain_t complain_forwarding = C_COMPLAIN_INIT_STATIC;
387 _Bool received = 0;
389 if (n->meta == NULL)
390 return (1);
392 received = check_notify_received (n);
394 if (network_config_forward && received)
395 {
396 c_complain_once (LOG_ERR, &complain_forwarding,
397 "network plugin: A notification has been received via the network "
398 "and forwarding is enabled. Forwarding of notifications is currently "
399 "not supported, because there is not loop-deteciton available. "
400 "Please contact the collectd mailing list if you need this "
401 "feature.");
402 }
404 /* By default, only *send* value lists that were not *received* by the
405 * network plugin. */
406 return (!received);
407 } /* }}} _Bool check_send_notify_okay */
409 static int network_dispatch_values (value_list_t *vl, /* {{{ */
410 const char *username)
411 {
412 int status;
414 if ((vl->time <= 0)
415 || (strlen (vl->host) <= 0)
416 || (strlen (vl->plugin) <= 0)
417 || (strlen (vl->type) <= 0))
418 return (-EINVAL);
420 if (!check_receive_okay (vl))
421 {
422 #if COLLECT_DEBUG
423 char name[6*DATA_MAX_NAME_LEN];
424 FORMAT_VL (name, sizeof (name), vl);
425 name[sizeof (name) - 1] = 0;
426 DEBUG ("network plugin: network_dispatch_values: "
427 "NOT dispatching %s.", name);
428 #endif
429 stats_values_not_dispatched++;
430 return (0);
431 }
433 assert (vl->meta == NULL);
435 vl->meta = meta_data_create ();
436 if (vl->meta == NULL)
437 {
438 ERROR ("network plugin: meta_data_create failed.");
439 return (-ENOMEM);
440 }
442 status = meta_data_add_boolean (vl->meta, "network:received", 1);
443 if (status != 0)
444 {
445 ERROR ("network plugin: meta_data_add_boolean failed.");
446 meta_data_destroy (vl->meta);
447 vl->meta = NULL;
448 return (status);
449 }
451 if (username != NULL)
452 {
453 status = meta_data_add_string (vl->meta, "network:username", username);
454 if (status != 0)
455 {
456 ERROR ("network plugin: meta_data_add_string failed.");
457 meta_data_destroy (vl->meta);
458 vl->meta = NULL;
459 return (status);
460 }
461 }
463 plugin_dispatch_values (vl);
464 stats_values_dispatched++;
466 meta_data_destroy (vl->meta);
467 vl->meta = NULL;
469 return (0);
470 } /* }}} int network_dispatch_values */
472 static int network_dispatch_notification (notification_t *n) /* {{{ */
473 {
474 int status;
476 assert (n->meta == NULL);
478 status = plugin_notification_meta_add_boolean (n, "network:received", 1);
479 if (status != 0)
480 {
481 ERROR ("network plugin: plugin_notification_meta_add_boolean failed.");
482 plugin_notification_meta_free (n->meta);
483 n->meta = NULL;
484 return (status);
485 }
487 status = plugin_dispatch_notification (n);
489 plugin_notification_meta_free (n->meta);
490 n->meta = NULL;
492 return (status);
493 } /* }}} int network_dispatch_notification */
495 #if HAVE_LIBGCRYPT
496 static void network_init_gcrypt (void) /* {{{ */
497 {
498 /* http://lists.gnupg.org/pipermail/gcrypt-devel/2003-August/000458.html
499 * Because you can't know in a library whether another library has
500 * already initialized the library */
501 if (gcry_control (GCRYCTL_ANY_INITIALIZATION_P))
502 return;
504 /* http://www.gnupg.org/documentation/manuals/gcrypt/Multi_002dThreading.html
505 * To ensure thread-safety, it's important to set GCRYCTL_SET_THREAD_CBS
506 * *before* initalizing Libgcrypt with gcry_check_version(), which itself must
507 * be called before any other gcry_* function. GCRYCTL_ANY_INITIALIZATION_P
508 * above doesn't count, as it doesn't implicitly initalize Libgcrypt.
509 *
510 * tl;dr: keep all these gry_* statements in this exact order please. */
511 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
512 gcry_check_version (NULL);
513 gcry_control (GCRYCTL_INIT_SECMEM, 32768);
514 gcry_control (GCRYCTL_INITIALIZATION_FINISHED);
515 } /* }}} void network_init_gcrypt */
517 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
518 const void *iv, size_t iv_size, const char *username)
519 {
520 gcry_error_t err;
521 gcry_cipher_hd_t *cyper_ptr;
522 unsigned char password_hash[32];
524 if (se->type == SOCKENT_TYPE_CLIENT)
525 {
526 cyper_ptr = &se->data.client.cypher;
527 memcpy (password_hash, se->data.client.password_hash,
528 sizeof (password_hash));
529 }
530 else
531 {
532 char *secret;
534 cyper_ptr = &se->data.server.cypher;
536 if (username == NULL)
537 return (NULL);
539 secret = fbh_get (se->data.server.userdb, username);
540 if (secret == NULL)
541 return (NULL);
543 gcry_md_hash_buffer (GCRY_MD_SHA256,
544 password_hash,
545 secret, strlen (secret));
547 sfree (secret);
548 }
550 if (*cyper_ptr == NULL)
551 {
552 err = gcry_cipher_open (cyper_ptr,
553 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
554 if (err != 0)
555 {
556 ERROR ("network plugin: gcry_cipher_open returned: %s",
557 gcry_strerror (err));
558 *cyper_ptr = NULL;
559 return (NULL);
560 }
561 }
562 else
563 {
564 gcry_cipher_reset (*cyper_ptr);
565 }
566 assert (*cyper_ptr != NULL);
568 err = gcry_cipher_setkey (*cyper_ptr,
569 password_hash, sizeof (password_hash));
570 if (err != 0)
571 {
572 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
573 gcry_strerror (err));
574 gcry_cipher_close (*cyper_ptr);
575 *cyper_ptr = NULL;
576 return (NULL);
577 }
579 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
580 if (err != 0)
581 {
582 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
583 gcry_strerror (err));
584 gcry_cipher_close (*cyper_ptr);
585 *cyper_ptr = NULL;
586 return (NULL);
587 }
589 return (*cyper_ptr);
590 } /* }}} int network_get_aes256_cypher */
591 #endif /* HAVE_LIBGCRYPT */
593 static int write_part_values (char **ret_buffer, int *ret_buffer_len,
594 const data_set_t *ds, const value_list_t *vl)
595 {
596 char *packet_ptr;
597 int packet_len;
598 int num_values;
600 part_header_t pkg_ph;
601 uint16_t pkg_num_values;
602 uint8_t *pkg_values_types;
603 value_t *pkg_values;
605 int offset;
606 int i;
608 num_values = vl->values_len;
609 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
610 + (num_values * sizeof (uint8_t))
611 + (num_values * sizeof (value_t));
613 if (*ret_buffer_len < packet_len)
614 return (-1);
616 pkg_values_types = (uint8_t *) malloc (num_values * sizeof (uint8_t));
617 if (pkg_values_types == NULL)
618 {
619 ERROR ("network plugin: write_part_values: malloc failed.");
620 return (-1);
621 }
623 pkg_values = (value_t *) malloc (num_values * sizeof (value_t));
624 if (pkg_values == NULL)
625 {
626 free (pkg_values_types);
627 ERROR ("network plugin: write_part_values: malloc failed.");
628 return (-1);
629 }
631 pkg_ph.type = htons (TYPE_VALUES);
632 pkg_ph.length = htons (packet_len);
634 pkg_num_values = htons ((uint16_t) vl->values_len);
636 for (i = 0; i < num_values; i++)
637 {
638 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
639 switch (ds->ds[i].type)
640 {
641 case DS_TYPE_COUNTER:
642 pkg_values[i].counter = htonll (vl->values[i].counter);
643 break;
645 case DS_TYPE_GAUGE:
646 pkg_values[i].gauge = htond (vl->values[i].gauge);
647 break;
649 case DS_TYPE_DERIVE:
650 pkg_values[i].derive = htonll (vl->values[i].derive);
651 break;
653 case DS_TYPE_ABSOLUTE:
654 pkg_values[i].absolute = htonll (vl->values[i].absolute);
655 break;
657 default:
658 free (pkg_values_types);
659 free (pkg_values);
660 ERROR ("network plugin: write_part_values: "
661 "Unknown data source type: %i",
662 ds->ds[i].type);
663 return (-1);
664 } /* switch (ds->ds[i].type) */
665 } /* for (num_values) */
667 /*
668 * Use `memcpy' to write everything to the buffer, because the pointer
669 * may be unaligned and some architectures, such as SPARC, can't handle
670 * that.
671 */
672 packet_ptr = *ret_buffer;
673 offset = 0;
674 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
675 offset += sizeof (pkg_ph);
676 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
677 offset += sizeof (pkg_num_values);
678 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
679 offset += num_values * sizeof (uint8_t);
680 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
681 offset += num_values * sizeof (value_t);
683 assert (offset == packet_len);
685 *ret_buffer = packet_ptr + packet_len;
686 *ret_buffer_len -= packet_len;
688 free (pkg_values_types);
689 free (pkg_values);
691 return (0);
692 } /* int write_part_values */
694 static int write_part_number (char **ret_buffer, int *ret_buffer_len,
695 int type, uint64_t value)
696 {
697 char *packet_ptr;
698 int packet_len;
700 part_header_t pkg_head;
701 uint64_t pkg_value;
703 int offset;
705 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
707 if (*ret_buffer_len < packet_len)
708 return (-1);
710 pkg_head.type = htons (type);
711 pkg_head.length = htons (packet_len);
712 pkg_value = htonll (value);
714 packet_ptr = *ret_buffer;
715 offset = 0;
716 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
717 offset += sizeof (pkg_head);
718 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
719 offset += sizeof (pkg_value);
721 assert (offset == packet_len);
723 *ret_buffer = packet_ptr + packet_len;
724 *ret_buffer_len -= packet_len;
726 return (0);
727 } /* int write_part_number */
729 static int write_part_string (char **ret_buffer, int *ret_buffer_len,
730 int type, const char *str, int str_len)
731 {
732 char *buffer;
733 int buffer_len;
735 uint16_t pkg_type;
736 uint16_t pkg_length;
738 int offset;
740 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
741 if (*ret_buffer_len < buffer_len)
742 return (-1);
744 pkg_type = htons (type);
745 pkg_length = htons (buffer_len);
747 buffer = *ret_buffer;
748 offset = 0;
749 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
750 offset += sizeof (pkg_type);
751 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
752 offset += sizeof (pkg_length);
753 memcpy (buffer + offset, str, str_len);
754 offset += str_len;
755 memset (buffer + offset, '\0', 1);
756 offset += 1;
758 assert (offset == buffer_len);
760 *ret_buffer = buffer + buffer_len;
761 *ret_buffer_len -= buffer_len;
763 return (0);
764 } /* int write_part_string */
766 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
767 value_t **ret_values, int *ret_num_values)
768 {
769 char *buffer = *ret_buffer;
770 size_t buffer_len = *ret_buffer_len;
772 uint16_t tmp16;
773 size_t exp_size;
774 int i;
776 uint16_t pkg_length;
777 uint16_t pkg_type;
778 uint16_t pkg_numval;
780 uint8_t *pkg_types;
781 value_t *pkg_values;
783 if (buffer_len < 15)
784 {
785 NOTICE ("network plugin: packet is too short: "
786 "buffer_len = %zu", buffer_len);
787 return (-1);
788 }
790 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
791 buffer += sizeof (tmp16);
792 pkg_type = ntohs (tmp16);
794 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
795 buffer += sizeof (tmp16);
796 pkg_length = ntohs (tmp16);
798 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
799 buffer += sizeof (tmp16);
800 pkg_numval = ntohs (tmp16);
802 assert (pkg_type == TYPE_VALUES);
804 exp_size = 3 * sizeof (uint16_t)
805 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
806 if (buffer_len < exp_size)
807 {
808 WARNING ("network plugin: parse_part_values: "
809 "Packet too short: "
810 "Chunk of size %zu expected, "
811 "but buffer has only %zu bytes left.",
812 exp_size, buffer_len);
813 return (-1);
814 }
816 if (pkg_length != exp_size)
817 {
818 WARNING ("network plugin: parse_part_values: "
819 "Length and number of values "
820 "in the packet don't match.");
821 return (-1);
822 }
824 pkg_types = (uint8_t *) malloc (pkg_numval * sizeof (uint8_t));
825 pkg_values = (value_t *) malloc (pkg_numval * sizeof (value_t));
826 if ((pkg_types == NULL) || (pkg_values == NULL))
827 {
828 sfree (pkg_types);
829 sfree (pkg_values);
830 ERROR ("network plugin: parse_part_values: malloc failed.");
831 return (-1);
832 }
834 memcpy ((void *) pkg_types, (void *) buffer, pkg_numval * sizeof (uint8_t));
835 buffer += pkg_numval * sizeof (uint8_t);
836 memcpy ((void *) pkg_values, (void *) buffer, pkg_numval * sizeof (value_t));
837 buffer += pkg_numval * sizeof (value_t);
839 for (i = 0; i < pkg_numval; i++)
840 {
841 switch (pkg_types[i])
842 {
843 case DS_TYPE_COUNTER:
844 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
845 break;
847 case DS_TYPE_GAUGE:
848 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
849 break;
851 case DS_TYPE_DERIVE:
852 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
853 break;
855 case DS_TYPE_ABSOLUTE:
856 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
857 break;
859 default:
860 NOTICE ("network plugin: parse_part_values: "
861 "Don't know how to handle data source type %"PRIu8,
862 pkg_types[i]);
863 sfree (pkg_types);
864 sfree (pkg_values);
865 return (-1);
866 } /* switch (pkg_types[i]) */
867 }
869 *ret_buffer = buffer;
870 *ret_buffer_len = buffer_len - pkg_length;
871 *ret_num_values = pkg_numval;
872 *ret_values = pkg_values;
874 sfree (pkg_types);
876 return (0);
877 } /* int parse_part_values */
879 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
880 uint64_t *value)
881 {
882 char *buffer = *ret_buffer;
883 size_t buffer_len = *ret_buffer_len;
885 uint16_t tmp16;
886 uint64_t tmp64;
887 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
889 uint16_t pkg_length;
891 if (buffer_len < exp_size)
892 {
893 WARNING ("network plugin: parse_part_number: "
894 "Packet too short: "
895 "Chunk of size %zu expected, "
896 "but buffer has only %zu bytes left.",
897 exp_size, buffer_len);
898 return (-1);
899 }
901 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
902 buffer += sizeof (tmp16);
903 /* pkg_type = ntohs (tmp16); */
905 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
906 buffer += sizeof (tmp16);
907 pkg_length = ntohs (tmp16);
909 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
910 buffer += sizeof (tmp64);
911 *value = ntohll (tmp64);
913 *ret_buffer = buffer;
914 *ret_buffer_len = buffer_len - pkg_length;
916 return (0);
917 } /* int parse_part_number */
919 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
920 char *output, size_t const output_len)
921 {
922 char *buffer = *ret_buffer;
923 size_t buffer_len = *ret_buffer_len;
925 uint16_t tmp16;
926 size_t const header_size = 2 * sizeof (uint16_t);
928 uint16_t pkg_length;
929 size_t payload_size;
931 if (output_len <= 0)
932 return (EINVAL);
934 if (buffer_len < header_size)
935 {
936 WARNING ("network plugin: parse_part_string: "
937 "Packet too short: "
938 "Chunk of at least size %zu expected, "
939 "but buffer has only %zu bytes left.",
940 header_size, buffer_len);
941 return (-1);
942 }
944 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
945 buffer += sizeof (tmp16);
946 /* pkg_type = ntohs (tmp16); */
948 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
949 buffer += sizeof (tmp16);
950 pkg_length = ntohs (tmp16);
951 payload_size = ((size_t) pkg_length) - header_size;
953 /* Check that packet fits in the input buffer */
954 if (pkg_length > buffer_len)
955 {
956 WARNING ("network plugin: parse_part_string: "
957 "Packet too big: "
958 "Chunk of size %"PRIu16" received, "
959 "but buffer has only %zu bytes left.",
960 pkg_length, buffer_len);
961 return (-1);
962 }
964 /* Check that pkg_length is in the valid range */
965 if (pkg_length <= header_size)
966 {
967 WARNING ("network plugin: parse_part_string: "
968 "Packet too short: "
969 "Header claims this packet is only %hu "
970 "bytes long.", pkg_length);
971 return (-1);
972 }
974 /* Check that the package data fits into the output buffer.
975 * The previous if-statement ensures that:
976 * `pkg_length > header_size' */
977 if (output_len < payload_size)
978 {
979 WARNING ("network plugin: parse_part_string: "
980 "Buffer too small: "
981 "Output buffer holds %zu bytes, "
982 "which is too small to hold the received "
983 "%zu byte string.",
984 output_len, payload_size);
985 return (-1);
986 }
988 /* All sanity checks successfull, let's copy the data over */
989 memcpy ((void *) output, (void *) buffer, payload_size);
990 buffer += payload_size;
992 /* For some very weird reason '\0' doesn't do the trick on SPARC in
993 * this statement. */
994 if (output[payload_size - 1] != 0)
995 {
996 WARNING ("network plugin: parse_part_string: "
997 "Received string does not end "
998 "with a NULL-byte.");
999 return (-1);
1000 }
1002 *ret_buffer = buffer;
1003 *ret_buffer_len = buffer_len - pkg_length;
1005 return (0);
1006 } /* int parse_part_string */
1008 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
1009 * parse_packet and vice versa. */
1010 #define PP_SIGNED 0x01
1011 #define PP_ENCRYPTED 0x02
1012 static int parse_packet (sockent_t *se,
1013 void *buffer, size_t buffer_size, int flags,
1014 const char *username);
1016 #define BUFFER_READ(p,s) do { \
1017 memcpy ((p), buffer + buffer_offset, (s)); \
1018 buffer_offset += (s); \
1019 } while (0)
1021 #if HAVE_LIBGCRYPT
1022 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1023 void **ret_buffer, size_t *ret_buffer_len, int flags)
1024 {
1025 static c_complain_t complain_no_users = C_COMPLAIN_INIT_STATIC;
1027 char *buffer;
1028 size_t buffer_len;
1029 size_t buffer_offset;
1031 size_t username_len;
1032 char *secret;
1034 part_signature_sha256_t pss;
1035 uint16_t pss_head_length;
1036 char hash[sizeof (pss.hash)];
1038 gcry_md_hd_t hd;
1039 gcry_error_t err;
1040 unsigned char *hash_ptr;
1042 buffer = *ret_buffer;
1043 buffer_len = *ret_buffer_len;
1044 buffer_offset = 0;
1046 if (se->data.server.userdb == NULL)
1047 {
1048 c_complain (LOG_NOTICE, &complain_no_users,
1049 "network plugin: Received signed network packet but can't verify it "
1050 "because no user DB has been configured. Will accept it.");
1051 return (0);
1052 }
1054 /* Check if the buffer has enough data for this structure. */
1055 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
1056 return (-ENOMEM);
1058 /* Read type and length header */
1059 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1060 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1061 pss_head_length = ntohs (pss.head.length);
1063 /* Check if the `pss_head_length' is within bounds. */
1064 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
1065 || (pss_head_length > buffer_len))
1066 {
1067 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
1068 return (-1);
1069 }
1071 /* Copy the hash. */
1072 BUFFER_READ (pss.hash, sizeof (pss.hash));
1074 /* Calculate username length (without null byte) and allocate memory */
1075 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
1076 pss.username = malloc (username_len + 1);
1077 if (pss.username == NULL)
1078 return (-ENOMEM);
1080 /* Read the username */
1081 BUFFER_READ (pss.username, username_len);
1082 pss.username[username_len] = 0;
1084 assert (buffer_offset == pss_head_length);
1086 /* Query the password */
1087 secret = fbh_get (se->data.server.userdb, pss.username);
1088 if (secret == NULL)
1089 {
1090 ERROR ("network plugin: Unknown user: %s", pss.username);
1091 sfree (pss.username);
1092 return (-ENOENT);
1093 }
1095 /* Create a hash device and check the HMAC */
1096 hd = NULL;
1097 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
1098 if (err != 0)
1099 {
1100 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
1101 gcry_strerror (err));
1102 sfree (secret);
1103 sfree (pss.username);
1104 return (-1);
1105 }
1107 err = gcry_md_setkey (hd, secret, strlen (secret));
1108 if (err != 0)
1109 {
1110 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
1111 gcry_md_close (hd);
1112 sfree (secret);
1113 sfree (pss.username);
1114 return (-1);
1115 }
1117 gcry_md_write (hd,
1118 buffer + PART_SIGNATURE_SHA256_SIZE,
1119 buffer_len - PART_SIGNATURE_SHA256_SIZE);
1120 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
1121 if (hash_ptr == NULL)
1122 {
1123 ERROR ("network plugin: gcry_md_read failed.");
1124 gcry_md_close (hd);
1125 sfree (secret);
1126 sfree (pss.username);
1127 return (-1);
1128 }
1129 memcpy (hash, hash_ptr, sizeof (hash));
1131 /* Clean up */
1132 gcry_md_close (hd);
1133 hd = NULL;
1135 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1136 {
1137 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1138 "Hash mismatch.");
1139 }
1140 else
1141 {
1142 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1143 flags | PP_SIGNED, pss.username);
1144 }
1146 sfree (secret);
1147 sfree (pss.username);
1149 *ret_buffer = buffer + buffer_len;
1150 *ret_buffer_len = 0;
1152 return (0);
1153 } /* }}} int parse_part_sign_sha256 */
1154 /* #endif HAVE_LIBGCRYPT */
1156 #else /* if !HAVE_LIBGCRYPT */
1157 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1158 void **ret_buffer, size_t *ret_buffer_size, int flags)
1159 {
1160 static int warning_has_been_printed = 0;
1162 char *buffer;
1163 size_t buffer_size;
1164 size_t buffer_offset;
1165 uint16_t part_len;
1167 part_signature_sha256_t pss;
1169 buffer = *ret_buffer;
1170 buffer_size = *ret_buffer_size;
1171 buffer_offset = 0;
1173 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1174 return (-ENOMEM);
1176 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1177 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1178 part_len = ntohs (pss.head.length);
1180 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1181 || (part_len > buffer_size))
1182 return (-EINVAL);
1184 if (warning_has_been_printed == 0)
1185 {
1186 WARNING ("network plugin: Received signed packet, but the network "
1187 "plugin was not linked with libgcrypt, so I cannot "
1188 "verify the signature. The packet will be accepted.");
1189 warning_has_been_printed = 1;
1190 }
1192 parse_packet (se, buffer + part_len, buffer_size - part_len, flags,
1193 /* username = */ NULL);
1195 *ret_buffer = buffer + buffer_size;
1196 *ret_buffer_size = 0;
1198 return (0);
1199 } /* }}} int parse_part_sign_sha256 */
1200 #endif /* !HAVE_LIBGCRYPT */
1202 #if HAVE_LIBGCRYPT
1203 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1204 void **ret_buffer, size_t *ret_buffer_len,
1205 int flags)
1206 {
1207 char *buffer = *ret_buffer;
1208 size_t buffer_len = *ret_buffer_len;
1209 size_t payload_len;
1210 size_t part_size;
1211 size_t buffer_offset;
1212 uint16_t username_len;
1213 part_encryption_aes256_t pea;
1214 unsigned char hash[sizeof (pea.hash)];
1216 gcry_cipher_hd_t cypher;
1217 gcry_error_t err;
1219 /* Make sure at least the header if available. */
1220 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1221 {
1222 NOTICE ("network plugin: parse_part_encr_aes256: "
1223 "Discarding short packet.");
1224 return (-1);
1225 }
1227 buffer_offset = 0;
1229 /* Copy the unencrypted information into `pea'. */
1230 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1231 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1233 /* Check the `part size'. */
1234 part_size = ntohs (pea.head.length);
1235 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1236 || (part_size > buffer_len))
1237 {
1238 NOTICE ("network plugin: parse_part_encr_aes256: "
1239 "Discarding part with invalid size.");
1240 return (-1);
1241 }
1243 /* Read the username */
1244 BUFFER_READ (&username_len, sizeof (username_len));
1245 username_len = ntohs (username_len);
1247 if ((username_len <= 0)
1248 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1249 {
1250 NOTICE ("network plugin: parse_part_encr_aes256: "
1251 "Discarding part with invalid username length.");
1252 return (-1);
1253 }
1255 assert (username_len > 0);
1256 pea.username = malloc (username_len + 1);
1257 if (pea.username == NULL)
1258 return (-ENOMEM);
1259 BUFFER_READ (pea.username, username_len);
1260 pea.username[username_len] = 0;
1262 /* Last but not least, the initialization vector */
1263 BUFFER_READ (pea.iv, sizeof (pea.iv));
1265 /* Make sure we are at the right position */
1266 assert (buffer_offset == (username_len +
1267 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1269 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1270 pea.username);
1271 if (cypher == NULL)
1272 {
1273 sfree (pea.username);
1274 return (-1);
1275 }
1277 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1278 assert (payload_len > 0);
1280 /* Decrypt the packet in-place */
1281 err = gcry_cipher_decrypt (cypher,
1282 buffer + buffer_offset,
1283 part_size - buffer_offset,
1284 /* in = */ NULL, /* in len = */ 0);
1285 if (err != 0)
1286 {
1287 sfree (pea.username);
1288 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1289 gcry_strerror (err));
1290 return (-1);
1291 }
1293 /* Read the hash */
1294 BUFFER_READ (pea.hash, sizeof (pea.hash));
1296 /* Make sure we're at the right position - again */
1297 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1298 assert (buffer_offset == (part_size - payload_len));
1300 /* Check hash sum */
1301 memset (hash, 0, sizeof (hash));
1302 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1303 buffer + buffer_offset, payload_len);
1304 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1305 {
1306 sfree (pea.username);
1307 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1308 return (-1);
1309 }
1311 parse_packet (se, buffer + buffer_offset, payload_len,
1312 flags | PP_ENCRYPTED, pea.username);
1314 /* XXX: Free pea.username?!? */
1316 /* Update return values */
1317 *ret_buffer = buffer + part_size;
1318 *ret_buffer_len = buffer_len - part_size;
1320 sfree (pea.username);
1322 return (0);
1323 } /* }}} int parse_part_encr_aes256 */
1324 /* #endif HAVE_LIBGCRYPT */
1326 #else /* if !HAVE_LIBGCRYPT */
1327 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1328 void **ret_buffer, size_t *ret_buffer_size, int flags)
1329 {
1330 static int warning_has_been_printed = 0;
1332 char *buffer;
1333 size_t buffer_size;
1334 size_t buffer_offset;
1336 part_header_t ph;
1337 size_t ph_length;
1339 buffer = *ret_buffer;
1340 buffer_size = *ret_buffer_size;
1341 buffer_offset = 0;
1343 /* parse_packet assures this minimum size. */
1344 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1346 BUFFER_READ (&ph.type, sizeof (ph.type));
1347 BUFFER_READ (&ph.length, sizeof (ph.length));
1348 ph_length = ntohs (ph.length);
1350 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1351 || (ph_length > buffer_size))
1352 {
1353 ERROR ("network plugin: AES-256 encrypted part "
1354 "with invalid length received.");
1355 return (-1);
1356 }
1358 if (warning_has_been_printed == 0)
1359 {
1360 WARNING ("network plugin: Received encrypted packet, but the network "
1361 "plugin was not linked with libgcrypt, so I cannot "
1362 "decrypt it. The part will be discarded.");
1363 warning_has_been_printed = 1;
1364 }
1366 *ret_buffer += ph_length;
1367 *ret_buffer_size -= ph_length;
1369 return (0);
1370 } /* }}} int parse_part_encr_aes256 */
1371 #endif /* !HAVE_LIBGCRYPT */
1373 #undef BUFFER_READ
1375 static int parse_packet (sockent_t *se, /* {{{ */
1376 void *buffer, size_t buffer_size, int flags,
1377 const char *username)
1378 {
1379 int status;
1381 value_list_t vl = VALUE_LIST_INIT;
1382 notification_t n;
1384 #if HAVE_LIBGCRYPT
1385 int packet_was_signed = (flags & PP_SIGNED);
1386 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1387 int printed_ignore_warning = 0;
1388 #endif /* HAVE_LIBGCRYPT */
1391 memset (&vl, '\0', sizeof (vl));
1392 memset (&n, '\0', sizeof (n));
1393 status = 0;
1395 while ((status == 0) && (0 < buffer_size)
1396 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1397 {
1398 uint16_t pkg_length;
1399 uint16_t pkg_type;
1401 memcpy ((void *) &pkg_type,
1402 (void *) buffer,
1403 sizeof (pkg_type));
1404 memcpy ((void *) &pkg_length,
1405 (void *) (buffer + sizeof (pkg_type)),
1406 sizeof (pkg_length));
1408 pkg_length = ntohs (pkg_length);
1409 pkg_type = ntohs (pkg_type);
1411 if (pkg_length > buffer_size)
1412 break;
1413 /* Ensure that this loop terminates eventually */
1414 if (pkg_length < (2 * sizeof (uint16_t)))
1415 break;
1417 if (pkg_type == TYPE_ENCR_AES256)
1418 {
1419 status = parse_part_encr_aes256 (se,
1420 &buffer, &buffer_size, flags);
1421 if (status != 0)
1422 {
1423 ERROR ("network plugin: Decrypting AES256 "
1424 "part failed "
1425 "with status %i.", status);
1426 break;
1427 }
1428 }
1429 #if HAVE_LIBGCRYPT
1430 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1431 && (packet_was_encrypted == 0))
1432 {
1433 if (printed_ignore_warning == 0)
1434 {
1435 INFO ("network plugin: Unencrypted packet or "
1436 "part has been ignored.");
1437 printed_ignore_warning = 1;
1438 }
1439 buffer = ((char *) buffer) + pkg_length;
1440 continue;
1441 }
1442 #endif /* HAVE_LIBGCRYPT */
1443 else if (pkg_type == TYPE_SIGN_SHA256)
1444 {
1445 status = parse_part_sign_sha256 (se,
1446 &buffer, &buffer_size, flags);
1447 if (status != 0)
1448 {
1449 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1450 "signature failed "
1451 "with status %i.", status);
1452 break;
1453 }
1454 }
1455 #if HAVE_LIBGCRYPT
1456 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1457 && (packet_was_encrypted == 0)
1458 && (packet_was_signed == 0))
1459 {
1460 if (printed_ignore_warning == 0)
1461 {
1462 INFO ("network plugin: Unsigned packet or "
1463 "part has been ignored.");
1464 printed_ignore_warning = 1;
1465 }
1466 buffer = ((char *) buffer) + pkg_length;
1467 continue;
1468 }
1469 #endif /* HAVE_LIBGCRYPT */
1470 else if (pkg_type == TYPE_VALUES)
1471 {
1472 status = parse_part_values (&buffer, &buffer_size,
1473 &vl.values, &vl.values_len);
1474 if (status != 0)
1475 break;
1477 network_dispatch_values (&vl, username);
1479 sfree (vl.values);
1480 }
1481 else if (pkg_type == TYPE_TIME)
1482 {
1483 uint64_t tmp = 0;
1484 status = parse_part_number (&buffer, &buffer_size,
1485 &tmp);
1486 if (status == 0)
1487 {
1488 vl.time = TIME_T_TO_CDTIME_T (tmp);
1489 n.time = TIME_T_TO_CDTIME_T (tmp);
1490 }
1491 }
1492 else if (pkg_type == TYPE_TIME_HR)
1493 {
1494 uint64_t tmp = 0;
1495 status = parse_part_number (&buffer, &buffer_size,
1496 &tmp);
1497 if (status == 0)
1498 {
1499 vl.time = (cdtime_t) tmp;
1500 n.time = (cdtime_t) tmp;
1501 }
1502 }
1503 else if (pkg_type == TYPE_INTERVAL)
1504 {
1505 uint64_t tmp = 0;
1506 status = parse_part_number (&buffer, &buffer_size,
1507 &tmp);
1508 if (status == 0)
1509 vl.interval = TIME_T_TO_CDTIME_T (tmp);
1510 }
1511 else if (pkg_type == TYPE_INTERVAL_HR)
1512 {
1513 uint64_t tmp = 0;
1514 status = parse_part_number (&buffer, &buffer_size,
1515 &tmp);
1516 if (status == 0)
1517 vl.interval = (cdtime_t) tmp;
1518 }
1519 else if (pkg_type == TYPE_HOST)
1520 {
1521 status = parse_part_string (&buffer, &buffer_size,
1522 vl.host, sizeof (vl.host));
1523 if (status == 0)
1524 sstrncpy (n.host, vl.host, sizeof (n.host));
1525 }
1526 else if (pkg_type == TYPE_PLUGIN)
1527 {
1528 status = parse_part_string (&buffer, &buffer_size,
1529 vl.plugin, sizeof (vl.plugin));
1530 if (status == 0)
1531 sstrncpy (n.plugin, vl.plugin,
1532 sizeof (n.plugin));
1533 }
1534 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1535 {
1536 status = parse_part_string (&buffer, &buffer_size,
1537 vl.plugin_instance,
1538 sizeof (vl.plugin_instance));
1539 if (status == 0)
1540 sstrncpy (n.plugin_instance,
1541 vl.plugin_instance,
1542 sizeof (n.plugin_instance));
1543 }
1544 else if (pkg_type == TYPE_TYPE)
1545 {
1546 status = parse_part_string (&buffer, &buffer_size,
1547 vl.type, sizeof (vl.type));
1548 if (status == 0)
1549 sstrncpy (n.type, vl.type, sizeof (n.type));
1550 }
1551 else if (pkg_type == TYPE_TYPE_INSTANCE)
1552 {
1553 status = parse_part_string (&buffer, &buffer_size,
1554 vl.type_instance,
1555 sizeof (vl.type_instance));
1556 if (status == 0)
1557 sstrncpy (n.type_instance, vl.type_instance,
1558 sizeof (n.type_instance));
1559 }
1560 else if (pkg_type == TYPE_MESSAGE)
1561 {
1562 status = parse_part_string (&buffer, &buffer_size,
1563 n.message, sizeof (n.message));
1565 if (status != 0)
1566 {
1567 /* do nothing */
1568 }
1569 else if ((n.severity != NOTIF_FAILURE)
1570 && (n.severity != NOTIF_WARNING)
1571 && (n.severity != NOTIF_OKAY))
1572 {
1573 INFO ("network plugin: "
1574 "Ignoring notification with "
1575 "unknown severity %i.",
1576 n.severity);
1577 }
1578 else if (n.time <= 0)
1579 {
1580 INFO ("network plugin: "
1581 "Ignoring notification with "
1582 "time == 0.");
1583 }
1584 else if (strlen (n.message) <= 0)
1585 {
1586 INFO ("network plugin: "
1587 "Ignoring notification with "
1588 "an empty message.");
1589 }
1590 else
1591 {
1592 network_dispatch_notification (&n);
1593 }
1594 }
1595 else if (pkg_type == TYPE_SEVERITY)
1596 {
1597 uint64_t tmp = 0;
1598 status = parse_part_number (&buffer, &buffer_size,
1599 &tmp);
1600 if (status == 0)
1601 n.severity = (int) tmp;
1602 }
1603 else
1604 {
1605 DEBUG ("network plugin: parse_packet: Unknown part"
1606 " type: 0x%04hx", pkg_type);
1607 buffer = ((char *) buffer) + pkg_length;
1608 }
1609 } /* while (buffer_size > sizeof (part_header_t)) */
1611 if (status == 0 && buffer_size > 0)
1612 WARNING ("network plugin: parse_packet: Received truncated "
1613 "packet, try increasing `MaxPacketSize'");
1615 return (status);
1616 } /* }}} int parse_packet */
1618 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1619 {
1620 if (sec->fd >= 0)
1621 {
1622 close (sec->fd);
1623 sec->fd = -1;
1624 }
1625 sfree (sec->addr);
1626 #if HAVE_LIBGCRYPT
1627 sfree (sec->username);
1628 sfree (sec->password);
1629 if (sec->cypher != NULL)
1630 gcry_cipher_close (sec->cypher);
1631 #endif
1632 } /* }}} void free_sockent_client */
1634 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1635 {
1636 size_t i;
1638 for (i = 0; i < ses->fd_num; i++)
1639 {
1640 if (ses->fd[i] >= 0)
1641 {
1642 close (ses->fd[i]);
1643 ses->fd[i] = -1;
1644 }
1645 }
1647 sfree (ses->fd);
1648 #if HAVE_LIBGCRYPT
1649 sfree (ses->auth_file);
1650 fbh_destroy (ses->userdb);
1651 if (ses->cypher != NULL)
1652 gcry_cipher_close (ses->cypher);
1653 #endif
1654 } /* }}} void free_sockent_server */
1656 static void sockent_destroy (sockent_t *se) /* {{{ */
1657 {
1658 sockent_t *next;
1660 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1662 while (se != NULL)
1663 {
1664 next = se->next;
1666 sfree (se->node);
1667 sfree (se->service);
1669 if (se->type == SOCKENT_TYPE_CLIENT)
1670 free_sockent_client (&se->data.client);
1671 else
1672 free_sockent_server (&se->data.server);
1674 sfree (se);
1675 se = next;
1676 }
1677 } /* }}} void sockent_destroy */
1679 /*
1680 * int network_set_ttl
1681 *
1682 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1683 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1684 *
1685 * The `struct addrinfo' is used to destinguish between unicast and multicast
1686 * sockets.
1687 */
1688 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1689 {
1690 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1691 network_config_ttl);
1693 assert (se->type == SOCKENT_TYPE_CLIENT);
1695 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1696 return (-1);
1698 if (ai->ai_family == AF_INET)
1699 {
1700 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1701 int optname;
1703 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1704 optname = IP_MULTICAST_TTL;
1705 else
1706 optname = IP_TTL;
1708 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1709 &network_config_ttl,
1710 sizeof (network_config_ttl)) != 0)
1711 {
1712 char errbuf[1024];
1713 ERROR ("network plugin: setsockopt (ipv4-ttl): %s",
1714 sstrerror (errno, errbuf, sizeof (errbuf)));
1715 return (-1);
1716 }
1717 }
1718 else if (ai->ai_family == AF_INET6)
1719 {
1720 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1721 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1722 int optname;
1724 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1725 optname = IPV6_MULTICAST_HOPS;
1726 else
1727 optname = IPV6_UNICAST_HOPS;
1729 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1730 &network_config_ttl,
1731 sizeof (network_config_ttl)) != 0)
1732 {
1733 char errbuf[1024];
1734 ERROR ("network plugin: setsockopt(ipv6-ttl): %s",
1735 sstrerror (errno, errbuf,
1736 sizeof (errbuf)));
1737 return (-1);
1738 }
1739 }
1741 return (0);
1742 } /* int network_set_ttl */
1744 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1745 {
1746 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1747 se->interface);
1749 assert (se->type == SOCKENT_TYPE_CLIENT);
1751 if (ai->ai_family == AF_INET)
1752 {
1753 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1755 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1756 {
1757 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1758 /* If possible, use the "ip_mreqn" structure which has
1759 * an "interface index" member. Using the interface
1760 * index is preferred here, because of its similarity
1761 * to the way IPv6 handles this. Unfortunately, it
1762 * appears not to be portable. */
1763 struct ip_mreqn mreq;
1765 memset (&mreq, 0, sizeof (mreq));
1766 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1767 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1768 mreq.imr_ifindex = se->interface;
1769 #else
1770 struct ip_mreq mreq;
1772 memset (&mreq, 0, sizeof (mreq));
1773 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1774 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1775 #endif
1777 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1778 &mreq, sizeof (mreq)) != 0)
1779 {
1780 char errbuf[1024];
1781 ERROR ("network plugin: setsockopt (ipv4-multicast-if): %s",
1782 sstrerror (errno, errbuf, sizeof (errbuf)));
1783 return (-1);
1784 }
1786 return (0);
1787 }
1788 }
1789 else if (ai->ai_family == AF_INET6)
1790 {
1791 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1793 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1794 {
1795 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1796 &se->interface,
1797 sizeof (se->interface)) != 0)
1798 {
1799 char errbuf[1024];
1800 ERROR ("network plugin: setsockopt (ipv6-multicast-if): %s",
1801 sstrerror (errno, errbuf,
1802 sizeof (errbuf)));
1803 return (-1);
1804 }
1806 return (0);
1807 }
1808 }
1810 /* else: Not a multicast interface. */
1811 if (se->interface != 0)
1812 {
1813 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1814 char interface_name[IFNAMSIZ];
1816 if (if_indextoname (se->interface, interface_name) == NULL)
1817 return (-1);
1819 DEBUG ("network plugin: Binding socket to interface %s", interface_name);
1821 if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
1822 interface_name,
1823 sizeof(interface_name)) == -1 )
1824 {
1825 char errbuf[1024];
1826 ERROR ("network plugin: setsockopt (bind-if): %s",
1827 sstrerror (errno, errbuf, sizeof (errbuf)));
1828 return (-1);
1829 }
1830 /* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1832 #else
1833 WARNING ("network plugin: Cannot set the interface on a unicast "
1834 "socket because "
1835 # if !defined(SO_BINDTODEVICE)
1836 "the \"SO_BINDTODEVICE\" socket option "
1837 # else
1838 "the \"if_indextoname\" function "
1839 # endif
1840 "is not available on your system.");
1841 #endif
1843 }
1845 return (0);
1846 } /* }}} network_set_interface */
1848 static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
1849 {
1850 #if KERNEL_SOLARIS
1851 char loop = 0;
1852 #else
1853 int loop = 0;
1854 #endif
1855 int yes = 1;
1857 /* allow multiple sockets to use the same PORT number */
1858 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1859 &yes, sizeof(yes)) == -1) {
1860 char errbuf[1024];
1861 ERROR ("network plugin: setsockopt (reuseaddr): %s",
1862 sstrerror (errno, errbuf, sizeof (errbuf)));
1863 return (-1);
1864 }
1866 DEBUG ("fd = %i; calling `bind'", fd);
1868 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1869 {
1870 char errbuf[1024];
1871 ERROR ("bind: %s",
1872 sstrerror (errno, errbuf, sizeof (errbuf)));
1873 return (-1);
1874 }
1876 if (ai->ai_family == AF_INET)
1877 {
1878 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1879 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1880 {
1881 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1882 struct ip_mreqn mreq;
1883 #else
1884 struct ip_mreq mreq;
1885 #endif
1887 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1889 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1890 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1891 /* Set the interface using the interface index if
1892 * possible (available). Unfortunately, the struct
1893 * ip_mreqn is not portable. */
1894 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1895 mreq.imr_ifindex = interface_idx;
1896 #else
1897 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1898 #endif
1900 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1901 &loop, sizeof (loop)) == -1)
1902 {
1903 char errbuf[1024];
1904 ERROR ("network plugin: setsockopt (multicast-loop): %s",
1905 sstrerror (errno, errbuf,
1906 sizeof (errbuf)));
1907 return (-1);
1908 }
1910 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1911 &mreq, sizeof (mreq)) == -1)
1912 {
1913 char errbuf[1024];
1914 ERROR ("network plugin: setsockopt (add-membership): %s",
1915 sstrerror (errno, errbuf,
1916 sizeof (errbuf)));
1917 return (-1);
1918 }
1920 return (0);
1921 }
1922 }
1923 else if (ai->ai_family == AF_INET6)
1924 {
1925 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1926 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1927 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1928 {
1929 struct ipv6_mreq mreq;
1931 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1933 memcpy (&mreq.ipv6mr_multiaddr,
1934 &addr->sin6_addr,
1935 sizeof (addr->sin6_addr));
1937 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1938 * ipv6mr_interface may be set to zeroes to
1939 * choose the default multicast interface or to
1940 * the index of a particular multicast-capable
1941 * interface if the host is multihomed.
1942 * Membership is associ-associated with a
1943 * single interface; programs running on
1944 * multihomed hosts may need to join the same
1945 * group on more than one interface.*/
1946 mreq.ipv6mr_interface = interface_idx;
1948 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1949 &loop, sizeof (loop)) == -1)
1950 {
1951 char errbuf[1024];
1952 ERROR ("network plugin: setsockopt (ipv6-multicast-loop): %s",
1953 sstrerror (errno, errbuf,
1954 sizeof (errbuf)));
1955 return (-1);
1956 }
1958 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1959 &mreq, sizeof (mreq)) == -1)
1960 {
1961 char errbuf[1024];
1962 ERROR ("network plugin: setsockopt (ipv6-add-membership): %s",
1963 sstrerror (errno, errbuf,
1964 sizeof (errbuf)));
1965 return (-1);
1966 }
1968 return (0);
1969 }
1970 }
1972 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1973 /* if a specific interface was set, bind the socket to it. But to avoid
1974 * possible problems with multicast routing, only do that for non-multicast
1975 * addresses */
1976 if (interface_idx != 0)
1977 {
1978 char interface_name[IFNAMSIZ];
1980 if (if_indextoname (interface_idx, interface_name) == NULL)
1981 return (-1);
1983 DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
1985 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
1986 interface_name,
1987 sizeof(interface_name)) == -1 )
1988 {
1989 char errbuf[1024];
1990 ERROR ("network plugin: setsockopt (bind-if): %s",
1991 sstrerror (errno, errbuf, sizeof (errbuf)));
1992 return (-1);
1993 }
1994 }
1995 #endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1997 return (0);
1998 } /* int network_bind_socket */
2000 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
2001 * or `SOCKENT_TYPE_SERVER' */
2002 static sockent_t *sockent_create (int type) /* {{{ */
2003 {
2004 sockent_t *se;
2006 if ((type != SOCKENT_TYPE_CLIENT) && (type != SOCKENT_TYPE_SERVER))
2007 return (NULL);
2009 se = malloc (sizeof (*se));
2010 if (se == NULL)
2011 return (NULL);
2012 memset (se, 0, sizeof (*se));
2014 se->type = type;
2015 se->node = NULL;
2016 se->service = NULL;
2017 se->interface = 0;
2018 se->next = NULL;
2020 if (type == SOCKENT_TYPE_SERVER)
2021 {
2022 se->data.server.fd = NULL;
2023 #if HAVE_LIBGCRYPT
2024 se->data.server.security_level = SECURITY_LEVEL_NONE;
2025 se->data.server.auth_file = NULL;
2026 se->data.server.userdb = NULL;
2027 se->data.server.cypher = NULL;
2028 #endif
2029 }
2030 else
2031 {
2032 se->data.client.fd = -1;
2033 se->data.client.addr = NULL;
2034 #if HAVE_LIBGCRYPT
2035 se->data.client.security_level = SECURITY_LEVEL_NONE;
2036 se->data.client.username = NULL;
2037 se->data.client.password = NULL;
2038 se->data.client.cypher = NULL;
2039 #endif
2040 }
2042 return (se);
2043 } /* }}} sockent_t *sockent_create */
2045 static int sockent_init_crypto (sockent_t *se) /* {{{ */
2046 {
2047 #if HAVE_LIBGCRYPT /* {{{ */
2048 if (se->type == SOCKENT_TYPE_CLIENT)
2049 {
2050 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
2051 {
2052 network_init_gcrypt ();
2054 if ((se->data.client.username == NULL)
2055 || (se->data.client.password == NULL))
2056 {
2057 ERROR ("network plugin: Client socket with "
2058 "security requested, but no "
2059 "credentials are configured.");
2060 return (-1);
2061 }
2062 gcry_md_hash_buffer (GCRY_MD_SHA256,
2063 se->data.client.password_hash,
2064 se->data.client.password,
2065 strlen (se->data.client.password));
2066 }
2067 }
2068 else /* (se->type == SOCKENT_TYPE_SERVER) */
2069 {
2070 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2071 {
2072 network_init_gcrypt ();
2074 if (se->data.server.auth_file == NULL)
2075 {
2076 ERROR ("network plugin: Server socket with "
2077 "security requested, but no "
2078 "password file is configured.");
2079 return (-1);
2080 }
2081 }
2082 if (se->data.server.auth_file != NULL)
2083 {
2084 se->data.server.userdb = fbh_create (se->data.server.auth_file);
2085 if (se->data.server.userdb == NULL)
2086 {
2087 ERROR ("network plugin: Reading password file "
2088 "`%s' failed.",
2089 se->data.server.auth_file);
2090 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2091 return (-1);
2092 }
2093 }
2094 }
2095 #endif /* }}} HAVE_LIBGCRYPT */
2097 return (0);
2098 } /* }}} int sockent_init_crypto */
2100 static int sockent_client_disconnect (sockent_t *se) /* {{{ */
2101 {
2102 struct sockent_client *client;
2104 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2105 return (EINVAL);
2107 client = &se->data.client;
2108 if (client->fd >= 0) /* connected */
2109 {
2110 close (client->fd);
2111 client->fd = -1;
2112 }
2114 sfree (client->addr);
2115 client->addrlen = 0;
2117 return (0);
2118 } /* }}} int sockent_client_disconnect */
2120 static int sockent_client_connect (sockent_t *se) /* {{{ */
2121 {
2122 static c_complain_t complaint = C_COMPLAIN_INIT_STATIC;
2124 struct sockent_client *client;
2125 struct addrinfo ai_hints;
2126 struct addrinfo *ai_list = NULL, *ai_ptr;
2127 int status;
2129 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2130 return (EINVAL);
2132 client = &se->data.client;
2133 if (client->fd >= 0) /* already connected */
2134 return (0);
2136 memset (&ai_hints, 0, sizeof (ai_hints));
2137 #ifdef AI_ADDRCONFIG
2138 ai_hints.ai_flags |= AI_ADDRCONFIG;
2139 #endif
2140 ai_hints.ai_family = AF_UNSPEC;
2141 ai_hints.ai_socktype = SOCK_DGRAM;
2142 ai_hints.ai_protocol = IPPROTO_UDP;
2144 status = getaddrinfo (se->node,
2145 (se->service != NULL) ? se->service : NET_DEFAULT_PORT,
2146 &ai_hints, &ai_list);
2147 if (status != 0)
2148 {
2149 c_complain (LOG_ERR, &complaint,
2150 "network plugin: getaddrinfo (%s, %s) failed: %s",
2151 (se->node == NULL) ? "(null)" : se->node,
2152 (se->service == NULL) ? "(null)" : se->service,
2153 gai_strerror (status));
2154 return (-1);
2155 }
2156 else
2157 {
2158 c_release (LOG_NOTICE, &complaint,
2159 "network plugin: Successfully resolved \"%s\".",
2160 se->node);
2161 }
2163 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2164 {
2165 client->fd = socket (ai_ptr->ai_family,
2166 ai_ptr->ai_socktype,
2167 ai_ptr->ai_protocol);
2168 if (client->fd < 0)
2169 {
2170 char errbuf[1024];
2171 ERROR ("network plugin: socket(2) failed: %s",
2172 sstrerror (errno, errbuf,
2173 sizeof (errbuf)));
2174 continue;
2175 }
2177 client->addr = malloc (sizeof (*client->addr));
2178 if (client->addr == NULL)
2179 {
2180 ERROR ("network plugin: malloc failed.");
2181 close (client->fd);
2182 client->fd = -1;
2183 continue;
2184 }
2186 memset (client->addr, 0, sizeof (*client->addr));
2187 assert (sizeof (*client->addr) >= ai_ptr->ai_addrlen);
2188 memcpy (client->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2189 client->addrlen = ai_ptr->ai_addrlen;
2191 network_set_ttl (se, ai_ptr);
2192 network_set_interface (se, ai_ptr);
2194 /* We don't open more than one write-socket per
2195 * node/service pair.. */
2196 break;
2197 }
2199 freeaddrinfo (ai_list);
2200 if (client->fd < 0)
2201 return (-1);
2202 return (0);
2203 } /* }}} int sockent_client_connect */
2205 /* Open the file descriptors for a initialized sockent structure. */
2206 static int sockent_server_listen (sockent_t *se) /* {{{ */
2207 {
2208 struct addrinfo ai_hints;
2209 struct addrinfo *ai_list, *ai_ptr;
2210 int status;
2212 const char *node;
2213 const char *service;
2215 if (se == NULL)
2216 return (-1);
2218 node = se->node;
2219 service = se->service;
2221 if (service == NULL)
2222 service = NET_DEFAULT_PORT;
2224 DEBUG ("network plugin: sockent_server_listen: node = %s; service = %s;",
2225 node, service);
2227 memset (&ai_hints, 0, sizeof (ai_hints));
2228 ai_hints.ai_flags = 0;
2229 #ifdef AI_PASSIVE
2230 ai_hints.ai_flags |= AI_PASSIVE;
2231 #endif
2232 #ifdef AI_ADDRCONFIG
2233 ai_hints.ai_flags |= AI_ADDRCONFIG;
2234 #endif
2235 ai_hints.ai_family = AF_UNSPEC;
2236 ai_hints.ai_socktype = SOCK_DGRAM;
2237 ai_hints.ai_protocol = IPPROTO_UDP;
2239 status = getaddrinfo (node, service, &ai_hints, &ai_list);
2240 if (status != 0)
2241 {
2242 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
2243 (se->node == NULL) ? "(null)" : se->node,
2244 (se->service == NULL) ? "(null)" : se->service,
2245 gai_strerror (status));
2246 return (-1);
2247 }
2249 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2250 {
2251 int *tmp;
2253 tmp = realloc (se->data.server.fd,
2254 sizeof (*tmp) * (se->data.server.fd_num + 1));
2255 if (tmp == NULL)
2256 {
2257 ERROR ("network plugin: realloc failed.");
2258 continue;
2259 }
2260 se->data.server.fd = tmp;
2261 tmp = se->data.server.fd + se->data.server.fd_num;
2263 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
2264 ai_ptr->ai_protocol);
2265 if (*tmp < 0)
2266 {
2267 char errbuf[1024];
2268 ERROR ("network plugin: socket(2) failed: %s",
2269 sstrerror (errno, errbuf,
2270 sizeof (errbuf)));
2271 continue;
2272 }
2274 status = network_bind_socket (*tmp, ai_ptr, se->interface);
2275 if (status != 0)
2276 {
2277 close (*tmp);
2278 *tmp = -1;
2279 continue;
2280 }
2282 se->data.server.fd_num++;
2283 continue;
2284 } /* for (ai_list) */
2286 freeaddrinfo (ai_list);
2288 if (se->data.server.fd_num <= 0)
2289 return (-1);
2290 return (0);
2291 } /* }}} int sockent_server_listen */
2293 /* Add a sockent to the global list of sockets */
2294 static int sockent_add (sockent_t *se) /* {{{ */
2295 {
2296 sockent_t *last_ptr;
2298 if (se == NULL)
2299 return (-1);
2301 if (se->type == SOCKENT_TYPE_SERVER)
2302 {
2303 struct pollfd *tmp;
2304 size_t i;
2306 tmp = realloc (listen_sockets_pollfd,
2307 sizeof (*tmp) * (listen_sockets_num
2308 + se->data.server.fd_num));
2309 if (tmp == NULL)
2310 {
2311 ERROR ("network plugin: realloc failed.");
2312 return (-1);
2313 }
2314 listen_sockets_pollfd = tmp;
2315 tmp = listen_sockets_pollfd + listen_sockets_num;
2317 for (i = 0; i < se->data.server.fd_num; i++)
2318 {
2319 memset (tmp + i, 0, sizeof (*tmp));
2320 tmp[i].fd = se->data.server.fd[i];
2321 tmp[i].events = POLLIN | POLLPRI;
2322 tmp[i].revents = 0;
2323 }
2325 listen_sockets_num += se->data.server.fd_num;
2327 if (listen_sockets == NULL)
2328 {
2329 listen_sockets = se;
2330 return (0);
2331 }
2332 last_ptr = listen_sockets;
2333 }
2334 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2335 {
2336 if (sending_sockets == NULL)
2337 {
2338 sending_sockets = se;
2339 return (0);
2340 }
2341 last_ptr = sending_sockets;
2342 }
2344 while (last_ptr->next != NULL)
2345 last_ptr = last_ptr->next;
2346 last_ptr->next = se;
2348 return (0);
2349 } /* }}} int sockent_add */
2351 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
2352 {
2353 while (42)
2354 {
2355 receive_list_entry_t *ent;
2356 sockent_t *se;
2358 /* Lock and wait for more data to come in */
2359 pthread_mutex_lock (&receive_list_lock);
2360 while ((listen_loop == 0)
2361 && (receive_list_head == NULL))
2362 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
2364 /* Remove the head entry and unlock */
2365 ent = receive_list_head;
2366 if (ent != NULL)
2367 receive_list_head = ent->next;
2368 receive_list_length--;
2369 pthread_mutex_unlock (&receive_list_lock);
2371 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2372 * because we dispatch all missing packets before shutting down. */
2373 if (ent == NULL)
2374 break;
2376 /* Look for the correct `sockent_t' */
2377 se = listen_sockets;
2378 while (se != NULL)
2379 {
2380 size_t i;
2382 for (i = 0; i < se->data.server.fd_num; i++)
2383 if (se->data.server.fd[i] == ent->fd)
2384 break;
2386 if (i < se->data.server.fd_num)
2387 break;
2389 se = se->next;
2390 }
2392 if (se == NULL)
2393 {
2394 ERROR ("network plugin: Got packet from FD %i, but can't "
2395 "find an appropriate socket entry.",
2396 ent->fd);
2397 sfree (ent->data);
2398 sfree (ent);
2399 continue;
2400 }
2402 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0,
2403 /* username = */ NULL);
2404 sfree (ent->data);
2405 sfree (ent);
2406 } /* while (42) */
2408 return (NULL);
2409 } /* }}} void *dispatch_thread */
2411 static int network_receive (void) /* {{{ */
2412 {
2413 char buffer[network_config_packet_size];
2414 int buffer_len;
2416 int i;
2417 int status;
2419 receive_list_entry_t *private_list_head;
2420 receive_list_entry_t *private_list_tail;
2421 uint64_t private_list_length;
2423 assert (listen_sockets_num > 0);
2425 private_list_head = NULL;
2426 private_list_tail = NULL;
2427 private_list_length = 0;
2429 while (listen_loop == 0)
2430 {
2431 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2433 if (status <= 0)
2434 {
2435 char errbuf[1024];
2436 if (errno == EINTR)
2437 continue;
2438 ERROR ("poll failed: %s",
2439 sstrerror (errno, errbuf, sizeof (errbuf)));
2440 return (-1);
2441 }
2443 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2444 {
2445 receive_list_entry_t *ent;
2447 if ((listen_sockets_pollfd[i].revents
2448 & (POLLIN | POLLPRI)) == 0)
2449 continue;
2450 status--;
2452 buffer_len = recv (listen_sockets_pollfd[i].fd,
2453 buffer, sizeof (buffer),
2454 0 /* no flags */);
2455 if (buffer_len < 0)
2456 {
2457 char errbuf[1024];
2458 ERROR ("recv failed: %s",
2459 sstrerror (errno, errbuf,
2460 sizeof (errbuf)));
2461 return (-1);
2462 }
2464 stats_octets_rx += ((uint64_t) buffer_len);
2465 stats_packets_rx++;
2467 /* TODO: Possible performance enhancement: Do not free
2468 * these entries in the dispatch thread but put them in
2469 * another list, so we don't have to allocate more and
2470 * more of these structures. */
2471 ent = malloc (sizeof (receive_list_entry_t));
2472 if (ent == NULL)
2473 {
2474 ERROR ("network plugin: malloc failed.");
2475 return (-1);
2476 }
2477 memset (ent, 0, sizeof (receive_list_entry_t));
2478 ent->data = malloc (network_config_packet_size);
2479 if (ent->data == NULL)
2480 {
2481 sfree (ent);
2482 ERROR ("network plugin: malloc failed.");
2483 return (-1);
2484 }
2485 ent->fd = listen_sockets_pollfd[i].fd;
2486 ent->next = NULL;
2488 memcpy (ent->data, buffer, buffer_len);
2489 ent->data_len = buffer_len;
2491 if (private_list_head == NULL)
2492 private_list_head = ent;
2493 else
2494 private_list_tail->next = ent;
2495 private_list_tail = ent;
2496 private_list_length++;
2498 /* Do not block here. Blocking here has led to
2499 * insufficient performance in the past. */
2500 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2501 {
2502 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2503 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2505 if (receive_list_head == NULL)
2506 receive_list_head = private_list_head;
2507 else
2508 receive_list_tail->next = private_list_head;
2509 receive_list_tail = private_list_tail;
2510 receive_list_length += private_list_length;
2512 pthread_cond_signal (&receive_list_cond);
2513 pthread_mutex_unlock (&receive_list_lock);
2515 private_list_head = NULL;
2516 private_list_tail = NULL;
2517 private_list_length = 0;
2518 }
2519 } /* for (listen_sockets_pollfd) */
2520 } /* while (listen_loop == 0) */
2522 /* Make sure everything is dispatched before exiting. */
2523 if (private_list_head != NULL)
2524 {
2525 pthread_mutex_lock (&receive_list_lock);
2527 if (receive_list_head == NULL)
2528 receive_list_head = private_list_head;
2529 else
2530 receive_list_tail->next = private_list_head;
2531 receive_list_tail = private_list_tail;
2532 receive_list_length += private_list_length;
2534 private_list_head = NULL;
2535 private_list_tail = NULL;
2536 private_list_length = 0;
2538 pthread_cond_signal (&receive_list_cond);
2539 pthread_mutex_unlock (&receive_list_lock);
2540 }
2542 return (0);
2543 } /* }}} int network_receive */
2545 static void *receive_thread (void __attribute__((unused)) *arg)
2546 {
2547 return (network_receive () ? (void *) 1 : (void *) 0);
2548 } /* void *receive_thread */
2550 static void network_init_buffer (void)
2551 {
2552 memset (send_buffer, 0, network_config_packet_size);
2553 send_buffer_ptr = send_buffer;
2554 send_buffer_fill = 0;
2556 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2557 } /* int network_init_buffer */
2559 static void networt_send_buffer_plain (sockent_t *se, /* {{{ */
2560 const char *buffer, size_t buffer_size)
2561 {
2562 int status;
2564 while (42)
2565 {
2566 status = sockent_client_connect (se);
2567 if (status != 0)
2568 return;
2570 status = sendto (se->data.client.fd, buffer, buffer_size,
2571 /* flags = */ 0,
2572 (struct sockaddr *) se->data.client.addr,
2573 se->data.client.addrlen);
2574 if (status < 0)
2575 {
2576 char errbuf[1024];
2578 if ((errno == EINTR) || (errno == EAGAIN))
2579 continue;
2581 ERROR ("network plugin: sendto failed: %s. Closing sending socket.",
2582 sstrerror (errno, errbuf, sizeof (errbuf)));
2583 sockent_client_disconnect (se);
2584 return;
2585 }
2587 break;
2588 } /* while (42) */
2589 } /* }}} void networt_send_buffer_plain */
2591 #if HAVE_LIBGCRYPT
2592 #define BUFFER_ADD(p,s) do { \
2593 memcpy (buffer + buffer_offset, (p), (s)); \
2594 buffer_offset += (s); \
2595 } while (0)
2597 static void networt_send_buffer_signed (sockent_t *se, /* {{{ */
2598 const char *in_buffer, size_t in_buffer_size)
2599 {
2600 part_signature_sha256_t ps;
2601 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2602 size_t buffer_offset;
2603 size_t username_len;
2605 gcry_md_hd_t hd;
2606 gcry_error_t err;
2607 unsigned char *hash;
2609 hd = NULL;
2610 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2611 if (err != 0)
2612 {
2613 ERROR ("network plugin: Creating HMAC object failed: %s",
2614 gcry_strerror (err));
2615 return;
2616 }
2618 err = gcry_md_setkey (hd, se->data.client.password,
2619 strlen (se->data.client.password));
2620 if (err != 0)
2621 {
2622 ERROR ("network plugin: gcry_md_setkey failed: %s",
2623 gcry_strerror (err));
2624 gcry_md_close (hd);
2625 return;
2626 }
2628 username_len = strlen (se->data.client.username);
2629 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2630 {
2631 ERROR ("network plugin: Username too long: %s",
2632 se->data.client.username);
2633 return;
2634 }
2636 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2637 se->data.client.username, username_len);
2638 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2639 in_buffer, in_buffer_size);
2641 /* Initialize the `ps' structure. */
2642 memset (&ps, 0, sizeof (ps));
2643 ps.head.type = htons (TYPE_SIGN_SHA256);
2644 ps.head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len);
2646 /* Calculate the hash value. */
2647 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2648 username_len + in_buffer_size);
2649 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2650 if (hash == NULL)
2651 {
2652 ERROR ("network plugin: gcry_md_read failed.");
2653 gcry_md_close (hd);
2654 return;
2655 }
2656 memcpy (ps.hash, hash, sizeof (ps.hash));
2658 /* Add the header */
2659 buffer_offset = 0;
2661 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2662 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2663 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2665 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2667 gcry_md_close (hd);
2668 hd = NULL;
2670 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2671 networt_send_buffer_plain (se, buffer, buffer_offset);
2672 } /* }}} void networt_send_buffer_signed */
2674 static void networt_send_buffer_encrypted (sockent_t *se, /* {{{ */
2675 const char *in_buffer, size_t in_buffer_size)
2676 {
2677 part_encryption_aes256_t pea;
2678 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2679 size_t buffer_size;
2680 size_t buffer_offset;
2681 size_t header_size;
2682 size_t username_len;
2683 gcry_error_t err;
2684 gcry_cipher_hd_t cypher;
2686 /* Initialize the header fields */
2687 memset (&pea, 0, sizeof (pea));
2688 pea.head.type = htons (TYPE_ENCR_AES256);
2690 pea.username = se->data.client.username;
2692 username_len = strlen (pea.username);
2693 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2694 {
2695 ERROR ("network plugin: Username too long: %s", pea.username);
2696 return;
2697 }
2699 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2700 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2701 - sizeof (pea.hash);
2703 assert (buffer_size <= sizeof (buffer));
2704 DEBUG ("network plugin: networt_send_buffer_encrypted: "
2705 "buffer_size = %zu;", buffer_size);
2707 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2708 + username_len + in_buffer_size));
2709 pea.username_length = htons ((uint16_t) username_len);
2711 /* Chose a random initialization vector. */
2712 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2714 /* Create hash of the payload */
2715 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2717 /* Initialize the buffer */
2718 buffer_offset = 0;
2719 memset (buffer, 0, sizeof (buffer));
2722 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2723 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2724 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2725 BUFFER_ADD (pea.username, username_len);
2726 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2727 assert (buffer_offset == header_size);
2728 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2729 BUFFER_ADD (in_buffer, in_buffer_size);
2731 assert (buffer_offset == buffer_size);
2733 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2734 se->data.client.password);
2735 if (cypher == NULL)
2736 return;
2738 /* Encrypt the buffer in-place */
2739 err = gcry_cipher_encrypt (cypher,
2740 buffer + header_size,
2741 buffer_size - header_size,
2742 /* in = */ NULL, /* in len = */ 0);
2743 if (err != 0)
2744 {
2745 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2746 gcry_strerror (err));
2747 return;
2748 }
2750 /* Send it out without further modifications */
2751 networt_send_buffer_plain (se, buffer, buffer_size);
2752 } /* }}} void networt_send_buffer_encrypted */
2753 #undef BUFFER_ADD
2754 #endif /* HAVE_LIBGCRYPT */
2756 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2757 {
2758 sockent_t *se;
2760 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2762 for (se = sending_sockets; se != NULL; se = se->next)
2763 {
2764 #if HAVE_LIBGCRYPT
2765 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2766 networt_send_buffer_encrypted (se, buffer, buffer_len);
2767 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2768 networt_send_buffer_signed (se, buffer, buffer_len);
2769 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2770 #endif /* HAVE_LIBGCRYPT */
2771 networt_send_buffer_plain (se, buffer, buffer_len);
2772 } /* for (sending_sockets) */
2773 } /* }}} void network_send_buffer */
2775 static int add_to_buffer (char *buffer, int buffer_size, /* {{{ */
2776 value_list_t *vl_def,
2777 const data_set_t *ds, const value_list_t *vl)
2778 {
2779 char *buffer_orig = buffer;
2781 if (strcmp (vl_def->host, vl->host) != 0)
2782 {
2783 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2784 vl->host, strlen (vl->host)) != 0)
2785 return (-1);
2786 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2787 }
2789 if (vl_def->time != vl->time)
2790 {
2791 if (write_part_number (&buffer, &buffer_size, TYPE_TIME_HR,
2792 (uint64_t) vl->time))
2793 return (-1);
2794 vl_def->time = vl->time;
2795 }
2797 if (vl_def->interval != vl->interval)
2798 {
2799 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL_HR,
2800 (uint64_t) vl->interval))
2801 return (-1);
2802 vl_def->interval = vl->interval;
2803 }
2805 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2806 {
2807 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2808 vl->plugin, strlen (vl->plugin)) != 0)
2809 return (-1);
2810 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2811 }
2813 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2814 {
2815 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2816 vl->plugin_instance,
2817 strlen (vl->plugin_instance)) != 0)
2818 return (-1);
2819 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2820 }
2822 if (strcmp (vl_def->type, vl->type) != 0)
2823 {
2824 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2825 vl->type, strlen (vl->type)) != 0)
2826 return (-1);
2827 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2828 }
2830 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2831 {
2832 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2833 vl->type_instance,
2834 strlen (vl->type_instance)) != 0)
2835 return (-1);
2836 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2837 }
2839 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2840 return (-1);
2842 return (buffer - buffer_orig);
2843 } /* }}} int add_to_buffer */
2845 static void flush_buffer (void)
2846 {
2847 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2848 send_buffer_fill);
2850 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2852 stats_octets_tx += ((uint64_t) send_buffer_fill);
2853 stats_packets_tx++;
2855 network_init_buffer ();
2856 }
2858 static int network_write (const data_set_t *ds, const value_list_t *vl,
2859 user_data_t __attribute__((unused)) *user_data)
2860 {
2861 int status;
2863 if (!check_send_okay (vl))
2864 {
2865 #if COLLECT_DEBUG
2866 char name[6*DATA_MAX_NAME_LEN];
2867 FORMAT_VL (name, sizeof (name), vl);
2868 name[sizeof (name) - 1] = 0;
2869 DEBUG ("network plugin: network_write: "
2870 "NOT sending %s.", name);
2871 #endif
2872 /* Counter is not protected by another lock and may be reached by
2873 * multiple threads */
2874 pthread_mutex_lock (&stats_lock);
2875 stats_values_not_sent++;
2876 pthread_mutex_unlock (&stats_lock);
2877 return (0);
2878 }
2880 uc_meta_data_add_unsigned_int (vl,
2881 "network:time_sent", (uint64_t) vl->time);
2883 pthread_mutex_lock (&send_buffer_lock);
2885 status = add_to_buffer (send_buffer_ptr,
2886 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2887 &send_buffer_vl,
2888 ds, vl);
2889 if (status >= 0)
2890 {
2891 /* status == bytes added to the buffer */
2892 send_buffer_fill += status;
2893 send_buffer_ptr += status;
2895 stats_values_sent++;
2896 }
2897 else
2898 {
2899 flush_buffer ();
2901 status = add_to_buffer (send_buffer_ptr,
2902 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2903 &send_buffer_vl,
2904 ds, vl);
2906 if (status >= 0)
2907 {
2908 send_buffer_fill += status;
2909 send_buffer_ptr += status;
2911 stats_values_sent++;
2912 }
2913 }
2915 if (status < 0)
2916 {
2917 ERROR ("network plugin: Unable to append to the "
2918 "buffer for some weird reason");
2919 }
2920 else if ((network_config_packet_size - send_buffer_fill) < 15)
2921 {
2922 flush_buffer ();
2923 }
2925 pthread_mutex_unlock (&send_buffer_lock);
2927 return ((status < 0) ? -1 : 0);
2928 } /* int network_write */
2930 static int network_config_set_boolean (const oconfig_item_t *ci, /* {{{ */
2931 int *retval)
2932 {
2933 if ((ci->values_num != 1)
2934 || ((ci->values[0].type != OCONFIG_TYPE_BOOLEAN)
2935 && (ci->values[0].type != OCONFIG_TYPE_STRING)))
2936 {
2937 ERROR ("network plugin: The `%s' config option needs "
2938 "exactly one boolean argument.", ci->key);
2939 return (-1);
2940 }
2942 if (ci->values[0].type == OCONFIG_TYPE_BOOLEAN)
2943 {
2944 if (ci->values[0].value.boolean)
2945 *retval = 1;
2946 else
2947 *retval = 0;
2948 }
2949 else
2950 {
2951 char *str = ci->values[0].value.string;
2953 if (IS_TRUE (str))
2954 *retval = 1;
2955 else if (IS_FALSE (str))
2956 *retval = 0;
2957 else
2958 {
2959 ERROR ("network plugin: Cannot parse string value `%s' of the `%s' "
2960 "option as boolean value.",
2961 str, ci->key);
2962 return (-1);
2963 }
2964 }
2966 return (0);
2967 } /* }}} int network_config_set_boolean */
2969 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2970 {
2971 int tmp;
2972 if ((ci->values_num != 1)
2973 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2974 {
2975 WARNING ("network plugin: The `TimeToLive' config option needs exactly "
2976 "one numeric argument.");
2977 return (-1);
2978 }
2980 tmp = (int) ci->values[0].value.number;
2981 if ((tmp > 0) && (tmp <= 255))
2982 network_config_ttl = tmp;
2983 else {
2984 WARNING ("network plugin: The `TimeToLive' must be between 1 and 255.");
2985 return (-1);
2986 }
2988 return (0);
2989 } /* }}} int network_config_set_ttl */
2991 static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
2992 int *interface)
2993 {
2994 if ((ci->values_num != 1)
2995 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2996 {
2997 WARNING ("network plugin: The `Interface' config option needs exactly "
2998 "one string argument.");
2999 return (-1);
3000 }
3002 if (interface == NULL)
3003 return (-1);
3005 *interface = if_nametoindex (ci->values[0].value.string);
3007 return (0);
3008 } /* }}} int network_config_set_interface */
3010 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
3011 {
3012 int tmp;
3013 if ((ci->values_num != 1)
3014 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
3015 {
3016 WARNING ("network plugin: The `MaxPacketSize' config option needs exactly "
3017 "one numeric argument.");
3018 return (-1);
3019 }
3021 tmp = (int) ci->values[0].value.number;
3022 if ((tmp >= 1024) && (tmp <= 65535))
3023 network_config_packet_size = tmp;
3025 return (0);
3026 } /* }}} int network_config_set_buffer_size */
3028 #if HAVE_LIBGCRYPT
3029 static int network_config_set_string (const oconfig_item_t *ci, /* {{{ */
3030 char **ret_string)
3031 {
3032 char *tmp;
3033 if ((ci->values_num != 1)
3034 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3035 {
3036 WARNING ("network plugin: The `%s' config option needs exactly "
3037 "one string argument.", ci->key);
3038 return (-1);
3039 }
3041 tmp = strdup (ci->values[0].value.string);
3042 if (tmp == NULL)
3043 return (-1);
3045 sfree (*ret_string);
3046 *ret_string = tmp;
3048 return (0);
3049 } /* }}} int network_config_set_string */
3050 #endif /* HAVE_LIBGCRYPT */
3052 #if HAVE_LIBGCRYPT
3053 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
3054 int *retval)
3055 {
3056 char *str;
3057 if ((ci->values_num != 1)
3058 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3059 {
3060 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
3061 "one string argument.");
3062 return (-1);
3063 }
3065 str = ci->values[0].value.string;
3066 if (strcasecmp ("Encrypt", str) == 0)
3067 *retval = SECURITY_LEVEL_ENCRYPT;
3068 else if (strcasecmp ("Sign", str) == 0)
3069 *retval = SECURITY_LEVEL_SIGN;
3070 else if (strcasecmp ("None", str) == 0)
3071 *retval = SECURITY_LEVEL_NONE;
3072 else
3073 {
3074 WARNING ("network plugin: Unknown security level: %s.", str);
3075 return (-1);
3076 }
3078 return (0);
3079 } /* }}} int network_config_set_security_level */
3080 #endif /* HAVE_LIBGCRYPT */
3082 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
3083 {
3084 sockent_t *se;
3085 int status;
3086 int i;
3088 if ((ci->values_num < 1) || (ci->values_num > 2)
3089 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3090 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3091 {
3092 ERROR ("network plugin: The `%s' config option needs "
3093 "one or two string arguments.", ci->key);
3094 return (-1);
3095 }
3097 se = sockent_create (SOCKENT_TYPE_SERVER);
3098 if (se == NULL)
3099 {
3100 ERROR ("network plugin: sockent_create failed.");
3101 return (-1);
3102 }
3104 se->node = strdup (ci->values[0].value.string);
3105 if (ci->values_num >= 2)
3106 se->service = strdup (ci->values[1].value.string);
3108 for (i = 0; i < ci->children_num; i++)
3109 {
3110 oconfig_item_t *child = ci->children + i;
3112 #if HAVE_LIBGCRYPT
3113 if (strcasecmp ("AuthFile", child->key) == 0)
3114 network_config_set_string (child, &se->data.server.auth_file);
3115 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3116 network_config_set_security_level (child,
3117 &se->data.server.security_level);
3118 else
3119 #endif /* HAVE_LIBGCRYPT */
3120 if (strcasecmp ("Interface", child->key) == 0)
3121 network_config_set_interface (child,
3122 &se->interface);
3123 else
3124 {
3125 WARNING ("network plugin: Option `%s' is not allowed here.",
3126 child->key);
3127 }
3128 }
3130 #if HAVE_LIBGCRYPT
3131 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
3132 && (se->data.server.auth_file == NULL))
3133 {
3134 ERROR ("network plugin: A security level higher than `none' was "
3135 "requested, but no AuthFile option was given. Cowardly refusing to "
3136 "open this socket!");
3137 sockent_destroy (se);
3138 return (-1);
3139 }
3140 #endif /* HAVE_LIBGCRYPT */
3142 status = sockent_init_crypto (se);
3143 if (status != 0)
3144 {
3145 ERROR ("network plugin: network_config_add_listen: sockent_init_crypto() failed.");
3146 sockent_destroy (se);
3147 return (-1);
3148 }
3150 status = sockent_server_listen (se);
3151 if (status != 0)
3152 {
3153 ERROR ("network plugin: network_config_add_server: sockent_server_listen failed.");
3154 sockent_destroy (se);
3155 return (-1);
3156 }
3158 status = sockent_add (se);
3159 if (status != 0)
3160 {
3161 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
3162 sockent_destroy (se);
3163 return (-1);
3164 }
3166 return (0);
3167 } /* }}} int network_config_add_listen */
3169 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
3170 {
3171 sockent_t *se;
3172 int status;
3173 int i;
3175 if ((ci->values_num < 1) || (ci->values_num > 2)
3176 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3177 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3178 {
3179 ERROR ("network plugin: The `%s' config option needs "
3180 "one or two string arguments.", ci->key);
3181 return (-1);
3182 }
3184 se = sockent_create (SOCKENT_TYPE_CLIENT);
3185 if (se == NULL)
3186 {
3187 ERROR ("network plugin: sockent_create failed.");
3188 return (-1);
3189 }
3191 se->node = strdup (ci->values[0].value.string);
3192 if (ci->values_num >= 2)
3193 se->service = strdup (ci->values[1].value.string);
3195 for (i = 0; i < ci->children_num; i++)
3196 {
3197 oconfig_item_t *child = ci->children + i;
3199 #if HAVE_LIBGCRYPT
3200 if (strcasecmp ("Username", child->key) == 0)
3201 network_config_set_string (child, &se->data.client.username);
3202 else if (strcasecmp ("Password", child->key) == 0)
3203 network_config_set_string (child, &se->data.client.password);
3204 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3205 network_config_set_security_level (child,
3206 &se->data.client.security_level);
3207 else
3208 #endif /* HAVE_LIBGCRYPT */
3209 if (strcasecmp ("Interface", child->key) == 0)
3210 network_config_set_interface (child,
3211 &se->interface);
3212 else
3213 {
3214 WARNING ("network plugin: Option `%s' is not allowed here.",
3215 child->key);
3216 }
3217 }
3219 #if HAVE_LIBGCRYPT
3220 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
3221 && ((se->data.client.username == NULL)
3222 || (se->data.client.password == NULL)))
3223 {
3224 ERROR ("network plugin: A security level higher than `none' was "
3225 "requested, but no Username or Password option was given. "
3226 "Cowardly refusing to open this socket!");
3227 sockent_destroy (se);
3228 return (-1);
3229 }
3230 #endif /* HAVE_LIBGCRYPT */
3232 status = sockent_init_crypto (se);
3233 if (status != 0)
3234 {
3235 ERROR ("network plugin: network_config_add_server: sockent_init_crypto() failed.");
3236 sockent_destroy (se);
3237 return (-1);
3238 }
3240 /* No call to sockent_client_connect() here -- it is called from
3241 * networt_send_buffer_plain(). */
3243 status = sockent_add (se);
3244 if (status != 0)
3245 {
3246 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
3247 sockent_destroy (se);
3248 return (-1);
3249 }
3251 return (0);
3252 } /* }}} int network_config_add_server */
3254 static int network_config (oconfig_item_t *ci) /* {{{ */
3255 {
3256 int i;
3258 /* The options need to be applied first */
3259 for (i = 0; i < ci->children_num; i++)
3260 {
3261 oconfig_item_t *child = ci->children + i;
3262 if (strcasecmp ("TimeToLive", child->key) == 0)
3263 network_config_set_ttl (child);
3264 }
3266 for (i = 0; i < ci->children_num; i++)
3267 {
3268 oconfig_item_t *child = ci->children + i;
3270 if (strcasecmp ("Listen", child->key) == 0)
3271 network_config_add_listen (child);
3272 else if (strcasecmp ("Server", child->key) == 0)
3273 network_config_add_server (child);
3274 else if (strcasecmp ("TimeToLive", child->key) == 0) {
3275 /* Handled earlier */
3276 }
3277 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
3278 network_config_set_buffer_size (child);
3279 else if (strcasecmp ("Forward", child->key) == 0)
3280 network_config_set_boolean (child, &network_config_forward);
3281 else if (strcasecmp ("ReportStats", child->key) == 0)
3282 network_config_set_boolean (child, &network_config_stats);
3283 else
3284 {
3285 WARNING ("network plugin: Option `%s' is not allowed here.",
3286 child->key);
3287 }
3288 }
3290 return (0);
3291 } /* }}} int network_config */
3293 static int network_notification (const notification_t *n,
3294 user_data_t __attribute__((unused)) *user_data)
3295 {
3296 char buffer[network_config_packet_size];
3297 char *buffer_ptr = buffer;
3298 int buffer_free = sizeof (buffer);
3299 int status;
3301 if (!check_send_notify_okay (n))
3302 return (0);
3304 memset (buffer, 0, sizeof (buffer));
3306 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME_HR,
3307 (uint64_t) n->time);
3308 if (status != 0)
3309 return (-1);
3311 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
3312 (uint64_t) n->severity);
3313 if (status != 0)
3314 return (-1);
3316 if (strlen (n->host) > 0)
3317 {
3318 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
3319 n->host, strlen (n->host));
3320 if (status != 0)
3321 return (-1);
3322 }
3324 if (strlen (n->plugin) > 0)
3325 {
3326 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
3327 n->plugin, strlen (n->plugin));
3328 if (status != 0)
3329 return (-1);
3330 }
3332 if (strlen (n->plugin_instance) > 0)
3333 {
3334 status = write_part_string (&buffer_ptr, &buffer_free,
3335 TYPE_PLUGIN_INSTANCE,
3336 n->plugin_instance, strlen (n->plugin_instance));
3337 if (status != 0)
3338 return (-1);
3339 }
3341 if (strlen (n->type) > 0)
3342 {
3343 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3344 n->type, strlen (n->type));
3345 if (status != 0)
3346 return (-1);
3347 }
3349 if (strlen (n->type_instance) > 0)
3350 {
3351 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3352 n->type_instance, strlen (n->type_instance));
3353 if (status != 0)
3354 return (-1);
3355 }
3357 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3358 n->message, strlen (n->message));
3359 if (status != 0)
3360 return (-1);
3362 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3364 return (0);
3365 } /* int network_notification */
3367 static int network_shutdown (void)
3368 {
3369 sockent_t *se;
3371 listen_loop++;
3373 /* Kill the listening thread */
3374 if (receive_thread_running != 0)
3375 {
3376 INFO ("network plugin: Stopping receive thread.");
3377 pthread_kill (receive_thread_id, SIGTERM);
3378 pthread_join (receive_thread_id, NULL /* no return value */);
3379 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3380 receive_thread_running = 0;
3381 }
3383 /* Shutdown the dispatching thread */
3384 if (dispatch_thread_running != 0)
3385 {
3386 INFO ("network plugin: Stopping dispatch thread.");
3387 pthread_mutex_lock (&receive_list_lock);
3388 pthread_cond_broadcast (&receive_list_cond);
3389 pthread_mutex_unlock (&receive_list_lock);
3390 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3391 dispatch_thread_running = 0;
3392 }
3394 sockent_destroy (listen_sockets);
3396 if (send_buffer_fill > 0)
3397 flush_buffer ();
3399 sfree (send_buffer);
3401 for (se = sending_sockets; se != NULL; se = se->next)
3402 sockent_client_disconnect (se);
3403 sockent_destroy (sending_sockets);
3405 plugin_unregister_config ("network");
3406 plugin_unregister_init ("network");
3407 plugin_unregister_write ("network");
3408 plugin_unregister_shutdown ("network");
3410 return (0);
3411 } /* int network_shutdown */
3413 static int network_stats_read (void) /* {{{ */
3414 {
3415 derive_t copy_octets_rx;
3416 derive_t copy_octets_tx;
3417 derive_t copy_packets_rx;
3418 derive_t copy_packets_tx;
3419 derive_t copy_values_dispatched;
3420 derive_t copy_values_not_dispatched;
3421 derive_t copy_values_sent;
3422 derive_t copy_values_not_sent;
3423 derive_t copy_receive_list_length;
3424 value_list_t vl = VALUE_LIST_INIT;
3425 value_t values[2];
3427 copy_octets_rx = stats_octets_rx;
3428 copy_octets_tx = stats_octets_tx;
3429 copy_packets_rx = stats_packets_rx;
3430 copy_packets_tx = stats_packets_tx;
3431 copy_values_dispatched = stats_values_dispatched;
3432 copy_values_not_dispatched = stats_values_not_dispatched;
3433 copy_values_sent = stats_values_sent;
3434 copy_values_not_sent = stats_values_not_sent;
3435 copy_receive_list_length = receive_list_length;
3437 /* Initialize `vl' */
3438 vl.values = values;
3439 vl.values_len = 2;
3440 vl.time = 0;
3441 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3442 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3444 /* Octets received / sent */
3445 vl.values[0].derive = (derive_t) copy_octets_rx;
3446 vl.values[1].derive = (derive_t) copy_octets_tx;
3447 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3448 plugin_dispatch_values (&vl);
3450 /* Packets received / send */
3451 vl.values[0].derive = (derive_t) copy_packets_rx;
3452 vl.values[1].derive = (derive_t) copy_packets_tx;
3453 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3454 plugin_dispatch_values (&vl);
3456 /* Values (not) dispatched and (not) send */
3457 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3458 vl.values_len = 1;
3460 vl.values[0].derive = (derive_t) copy_values_dispatched;
3461 sstrncpy (vl.type_instance, "dispatch-accepted",
3462 sizeof (vl.type_instance));
3463 plugin_dispatch_values (&vl);
3465 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3466 sstrncpy (vl.type_instance, "dispatch-rejected",
3467 sizeof (vl.type_instance));
3468 plugin_dispatch_values (&vl);
3470 vl.values[0].derive = (derive_t) copy_values_sent;
3471 sstrncpy (vl.type_instance, "send-accepted",
3472 sizeof (vl.type_instance));
3473 plugin_dispatch_values (&vl);
3475 vl.values[0].derive = (derive_t) copy_values_not_sent;
3476 sstrncpy (vl.type_instance, "send-rejected",
3477 sizeof (vl.type_instance));
3478 plugin_dispatch_values (&vl);
3480 /* Receive queue length */
3481 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3482 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3483 vl.type_instance[0] = 0;
3484 plugin_dispatch_values (&vl);
3486 return (0);
3487 } /* }}} int network_stats_read */
3489 static int network_init (void)
3490 {
3491 static _Bool have_init = 0;
3493 /* Check if we were already initialized. If so, just return - there's
3494 * nothing more to do (for now, that is). */
3495 if (have_init)
3496 return (0);
3497 have_init = 1;
3499 #if HAVE_LIBGCRYPT
3500 network_init_gcrypt ();
3501 #endif
3503 if (network_config_stats != 0)
3504 plugin_register_read ("network", network_stats_read);
3506 plugin_register_shutdown ("network", network_shutdown);
3508 send_buffer = malloc (network_config_packet_size);
3509 if (send_buffer == NULL)
3510 {
3511 ERROR ("network plugin: malloc failed.");
3512 return (-1);
3513 }
3514 network_init_buffer ();
3516 /* setup socket(s) and so on */
3517 if (sending_sockets != NULL)
3518 {
3519 plugin_register_write ("network", network_write,
3520 /* user_data = */ NULL);
3521 plugin_register_notification ("network", network_notification,
3522 /* user_data = */ NULL);
3523 }
3525 /* If no threads need to be started, return here. */
3526 if ((listen_sockets_num == 0)
3527 || ((dispatch_thread_running != 0)
3528 && (receive_thread_running != 0)))
3529 return (0);
3531 if (dispatch_thread_running == 0)
3532 {
3533 int status;
3534 status = plugin_thread_create (&dispatch_thread_id,
3535 NULL /* no attributes */,
3536 dispatch_thread,
3537 NULL /* no argument */);
3538 if (status != 0)
3539 {
3540 char errbuf[1024];
3541 ERROR ("network: pthread_create failed: %s",
3542 sstrerror (errno, errbuf,
3543 sizeof (errbuf)));
3544 }
3545 else
3546 {
3547 dispatch_thread_running = 1;
3548 }
3549 }
3551 if (receive_thread_running == 0)
3552 {
3553 int status;
3554 status = plugin_thread_create (&receive_thread_id,
3555 NULL /* no attributes */,
3556 receive_thread,
3557 NULL /* no argument */);
3558 if (status != 0)
3559 {
3560 char errbuf[1024];
3561 ERROR ("network: pthread_create failed: %s",
3562 sstrerror (errno, errbuf,
3563 sizeof (errbuf)));
3564 }
3565 else
3566 {
3567 receive_thread_running = 1;
3568 }
3569 }
3571 return (0);
3572 } /* int network_init */
3574 /*
3575 * The flush option of the network plugin cannot flush individual identifiers.
3576 * All the values are added to a buffer and sent when the buffer is full, the
3577 * requested value may or may not be in there, it's not worth finding out. We
3578 * just send the buffer if `flush' is called - if the requested value was in
3579 * there, good. If not, well, then there is nothing to flush.. -octo
3580 */
3581 static int network_flush (__attribute__((unused)) cdtime_t timeout,
3582 __attribute__((unused)) const char *identifier,
3583 __attribute__((unused)) user_data_t *user_data)
3584 {
3585 pthread_mutex_lock (&send_buffer_lock);
3587 if (send_buffer_fill > 0)
3588 flush_buffer ();
3590 pthread_mutex_unlock (&send_buffer_lock);
3592 return (0);
3593 } /* int network_flush */
3595 void module_register (void)
3596 {
3597 plugin_register_complex_config ("network", network_config);
3598 plugin_register_init ("network", network_init);
3599 plugin_register_flush ("network", network_flush,
3600 /* user_data = */ NULL);
3601 } /* void module_register */
3603 /* vim: set fdm=marker : */