d0d5d91269ba876af5eb40cfc021a816bd58ef3a
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 _DEFAULT_SOURCE
26 #define _BSD_SOURCE /* For struct ip_mreq */
28 #include "collectd.h"
30 #include "plugin.h"
31 #include "common.h"
32 #include "configfile.h"
33 #include "utils_fbhash.h"
34 #include "utils_cache.h"
35 #include "utils_complain.h"
37 #include "network.h"
39 #if HAVE_NETDB_H
40 # include <netdb.h>
41 #endif
42 #if HAVE_NETINET_IN_H
43 # include <netinet/in.h>
44 #endif
45 #if HAVE_ARPA_INET_H
46 # include <arpa/inet.h>
47 #endif
48 #if HAVE_POLL_H
49 # include <poll.h>
50 #endif
51 #if HAVE_NET_IF_H
52 # include <net/if.h>
53 #endif
55 #if HAVE_LIBGCRYPT
56 # if defined __APPLE__
57 /* default xcode compiler throws warnings even when deprecated functionality
58 * is not used. -Werror breaks the build because of erroneous warnings.
59 * http://stackoverflow.com/questions/10556299/compiler-warnings-with-libgcrypt-v1-5-0/12830209#12830209
60 */
61 # pragma GCC diagnostic ignored "-Wdeprecated-declarations"
62 # endif
63 /* FreeBSD's copy of libgcrypt extends the existing GCRYPT_NO_DEPRECATED
64 * to properly hide all deprecated functionality.
65 * http://svnweb.freebsd.org/ports/head/security/libgcrypt/files/patch-src__gcrypt.h.in
66 */
67 # define GCRYPT_NO_DEPRECATED
68 # include <gcrypt.h>
69 # if defined __APPLE__
70 /* Re enable deprecation warnings */
71 # pragma GCC diagnostic warning "-Wdeprecated-declarations"
72 # endif
73 # if GCRYPT_VERSION_NUMBER < 0x010600
74 GCRY_THREAD_OPTION_PTHREAD_IMPL;
75 # endif
76 #endif
78 #ifndef IPV6_ADD_MEMBERSHIP
79 # ifdef IPV6_JOIN_GROUP
80 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
81 # else
82 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
83 # endif
84 #endif /* !IP_ADD_MEMBERSHIP */
86 /*
87 * Maximum size required for encryption / signing:
88 *
89 * 42 bytes for the encryption header
90 * + 64 bytes for the username
91 * -----------
92 * = 106 bytes
93 */
94 #define BUFF_SIG_SIZE 106
96 /*
97 * Private data types
98 */
99 #define SECURITY_LEVEL_NONE 0
100 #if HAVE_LIBGCRYPT
101 # define SECURITY_LEVEL_SIGN 1
102 # define SECURITY_LEVEL_ENCRYPT 2
103 #endif
104 struct sockent_client
105 {
106 int fd;
107 struct sockaddr_storage *addr;
108 socklen_t addrlen;
109 #if HAVE_LIBGCRYPT
110 int security_level;
111 char *username;
112 char *password;
113 gcry_cipher_hd_t cypher;
114 unsigned char password_hash[32];
115 #endif
116 cdtime_t next_resolve_reconnect;
117 cdtime_t resolve_interval;
118 };
120 struct sockent_server
121 {
122 int *fd;
123 size_t fd_num;
124 #if HAVE_LIBGCRYPT
125 int security_level;
126 char *auth_file;
127 fbhash_t *userdb;
128 gcry_cipher_hd_t cypher;
129 #endif
130 };
132 typedef struct sockent
133 {
134 #define SOCKENT_TYPE_CLIENT 1
135 #define SOCKENT_TYPE_SERVER 2
136 int type;
138 char *node;
139 char *service;
140 int interface;
142 union
143 {
144 struct sockent_client client;
145 struct sockent_server server;
146 } data;
148 struct sockent *next;
149 } sockent_t;
151 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
152 * 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
153 * +-------+-----------------------+-------------------------------+
154 * ! Ver. ! ! Length !
155 * +-------+-----------------------+-------------------------------+
156 */
157 struct part_header_s
158 {
159 uint16_t type;
160 uint16_t length;
161 };
162 typedef struct part_header_s part_header_t;
164 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
165 * 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
166 * +-------------------------------+-------------------------------+
167 * ! Type ! Length !
168 * +-------------------------------+-------------------------------+
169 * : (Length - 4) Bytes :
170 * +---------------------------------------------------------------+
171 */
172 struct part_string_s
173 {
174 part_header_t *head;
175 char *value;
176 };
177 typedef struct part_string_s part_string_t;
179 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
180 * 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
181 * +-------------------------------+-------------------------------+
182 * ! Type ! Length !
183 * +-------------------------------+-------------------------------+
184 * : (Length - 4 == 2 || 4 || 8) Bytes :
185 * +---------------------------------------------------------------+
186 */
187 struct part_number_s
188 {
189 part_header_t *head;
190 uint64_t *value;
191 };
192 typedef struct part_number_s part_number_t;
194 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
195 * 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
196 * +-------------------------------+-------------------------------+
197 * ! Type ! Length !
198 * +-------------------------------+---------------+---------------+
199 * ! Num of values ! Type0 ! Type1 !
200 * +-------------------------------+---------------+---------------+
201 * ! Value0 !
202 * ! !
203 * +---------------------------------------------------------------+
204 * ! Value1 !
205 * ! !
206 * +---------------------------------------------------------------+
207 */
208 struct part_values_s
209 {
210 part_header_t *head;
211 uint16_t *num_values;
212 uint8_t *values_types;
213 value_t *values;
214 };
215 typedef struct part_values_s part_values_t;
217 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
218 * 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
219 * +-------------------------------+-------------------------------+
220 * ! Type ! Length !
221 * +-------------------------------+-------------------------------+
222 * ! Hash (Bits 0 - 31) !
223 * : : :
224 * ! Hash (Bits 224 - 255) !
225 * +---------------------------------------------------------------+
226 */
227 /* Minimum size */
228 #define PART_SIGNATURE_SHA256_SIZE 36
229 struct part_signature_sha256_s
230 {
231 part_header_t head;
232 unsigned char hash[32];
233 char *username;
234 };
235 typedef struct part_signature_sha256_s part_signature_sha256_t;
237 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
238 * 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
239 * +-------------------------------+-------------------------------+
240 * ! Type ! Length !
241 * +-------------------------------+-------------------------------+
242 * ! Original length ! Padding (0 - 15 bytes) !
243 * +-------------------------------+-------------------------------+
244 * ! Hash (Bits 0 - 31) !
245 * : : :
246 * ! Hash (Bits 128 - 159) !
247 * +---------------------------------------------------------------+
248 */
249 /* Minimum size */
250 #define PART_ENCRYPTION_AES256_SIZE 42
251 struct part_encryption_aes256_s
252 {
253 part_header_t head;
254 uint16_t username_length;
255 char *username;
256 unsigned char iv[16];
257 /* <encrypted> */
258 unsigned char hash[20];
259 /* <payload /> */
260 /* </encrypted> */
261 };
262 typedef struct part_encryption_aes256_s part_encryption_aes256_t;
264 struct receive_list_entry_s
265 {
266 char *data;
267 int data_len;
268 int fd;
269 struct receive_list_entry_s *next;
270 };
271 typedef struct receive_list_entry_s receive_list_entry_t;
273 /*
274 * Private variables
275 */
276 static int network_config_ttl = 0;
277 /* Ethernet - (IPv6 + UDP) = 1500 - (40 + 8) = 1452 */
278 static size_t network_config_packet_size = 1452;
279 static _Bool network_config_forward = 0;
280 static _Bool network_config_stats = 0;
282 static sockent_t *sending_sockets = NULL;
284 static receive_list_entry_t *receive_list_head = NULL;
285 static receive_list_entry_t *receive_list_tail = NULL;
286 static pthread_mutex_t receive_list_lock = PTHREAD_MUTEX_INITIALIZER;
287 static pthread_cond_t receive_list_cond = PTHREAD_COND_INITIALIZER;
288 static uint64_t receive_list_length = 0;
290 static sockent_t *listen_sockets = NULL;
291 static struct pollfd *listen_sockets_pollfd = NULL;
292 static size_t listen_sockets_num = 0;
294 /* The receive and dispatch threads will run as long as `listen_loop' is set to
295 * zero. */
296 static int listen_loop = 0;
297 static int receive_thread_running = 0;
298 static pthread_t receive_thread_id;
299 static int dispatch_thread_running = 0;
300 static pthread_t dispatch_thread_id;
302 /* Buffer in which to-be-sent network packets are constructed. */
303 static char *send_buffer;
304 static char *send_buffer_ptr;
305 static int send_buffer_fill;
306 static cdtime_t send_buffer_last_update;
307 static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
308 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
310 /* XXX: These counters are incremented from one place only. The spot in which
311 * the values are incremented is either only reachable by one thread (the
312 * dispatch thread, for example) or locked by some lock (send_buffer_lock for
313 * example). Only if neither is true, the stats_lock is acquired. The counters
314 * are always read without holding a lock in the hope that writing 8 bytes to
315 * memory is an atomic operation. */
316 static derive_t stats_octets_rx = 0;
317 static derive_t stats_octets_tx = 0;
318 static derive_t stats_packets_rx = 0;
319 static derive_t stats_packets_tx = 0;
320 static derive_t stats_values_dispatched = 0;
321 static derive_t stats_values_not_dispatched = 0;
322 static derive_t stats_values_sent = 0;
323 static derive_t stats_values_not_sent = 0;
324 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
326 /*
327 * Private functions
328 */
329 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
330 {
331 uint64_t time_sent = 0;
332 int status;
334 status = uc_meta_data_get_unsigned_int (vl,
335 "network:time_sent", &time_sent);
337 /* This is a value we already sent. Don't allow it to be received again in
338 * order to avoid looping. */
339 if ((status == 0) && (time_sent >= ((uint64_t) vl->time)))
340 return (0);
342 return (1);
343 } /* }}} _Bool check_receive_okay */
345 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
346 {
347 _Bool received = 0;
348 int status;
350 if (network_config_forward)
351 return (1);
353 if (vl->meta == NULL)
354 return (1);
356 status = meta_data_get_boolean (vl->meta, "network:received", &received);
357 if (status == -ENOENT)
358 return (1);
359 else if (status != 0)
360 {
361 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
362 "with status %i.", status);
363 return (1);
364 }
366 /* By default, only *send* value lists that were not *received* by the
367 * network plugin. */
368 return (!received);
369 } /* }}} _Bool check_send_okay */
371 static _Bool check_notify_received (const notification_t *n) /* {{{ */
372 {
373 notification_meta_t *ptr;
375 for (ptr = n->meta; ptr != NULL; ptr = ptr->next)
376 if ((strcmp ("network:received", ptr->name) == 0)
377 && (ptr->type == NM_TYPE_BOOLEAN))
378 return ((_Bool) ptr->nm_value.nm_boolean);
380 return (0);
381 } /* }}} _Bool check_notify_received */
383 static _Bool check_send_notify_okay (const notification_t *n) /* {{{ */
384 {
385 static c_complain_t complain_forwarding = C_COMPLAIN_INIT_STATIC;
386 _Bool received = 0;
388 if (n->meta == NULL)
389 return (1);
391 received = check_notify_received (n);
393 if (network_config_forward && received)
394 {
395 c_complain_once (LOG_ERR, &complain_forwarding,
396 "network plugin: A notification has been received via the network "
397 "and forwarding is enabled. Forwarding of notifications is currently "
398 "not supported, because there is not loop-deteciton available. "
399 "Please contact the collectd mailing list if you need this "
400 "feature.");
401 }
403 /* By default, only *send* value lists that were not *received* by the
404 * network plugin. */
405 return (!received);
406 } /* }}} _Bool check_send_notify_okay */
408 static int network_dispatch_values (value_list_t *vl, /* {{{ */
409 const char *username)
410 {
411 int status;
413 if ((vl->time == 0)
414 || (strlen (vl->host) == 0)
415 || (strlen (vl->plugin) == 0)
416 || (strlen (vl->type) == 0))
417 return (-EINVAL);
419 if (!check_receive_okay (vl))
420 {
421 #if COLLECT_DEBUG
422 char name[6*DATA_MAX_NAME_LEN];
423 FORMAT_VL (name, sizeof (name), vl);
424 name[sizeof (name) - 1] = 0;
425 DEBUG ("network plugin: network_dispatch_values: "
426 "NOT dispatching %s.", name);
427 #endif
428 stats_values_not_dispatched++;
429 return (0);
430 }
432 assert (vl->meta == NULL);
434 vl->meta = meta_data_create ();
435 if (vl->meta == NULL)
436 {
437 ERROR ("network plugin: meta_data_create failed.");
438 return (-ENOMEM);
439 }
441 status = meta_data_add_boolean (vl->meta, "network:received", 1);
442 if (status != 0)
443 {
444 ERROR ("network plugin: meta_data_add_boolean failed.");
445 meta_data_destroy (vl->meta);
446 vl->meta = NULL;
447 return (status);
448 }
450 if (username != NULL)
451 {
452 status = meta_data_add_string (vl->meta, "network:username", username);
453 if (status != 0)
454 {
455 ERROR ("network plugin: meta_data_add_string failed.");
456 meta_data_destroy (vl->meta);
457 vl->meta = NULL;
458 return (status);
459 }
460 }
462 plugin_dispatch_values (vl);
463 stats_values_dispatched++;
465 meta_data_destroy (vl->meta);
466 vl->meta = NULL;
468 return (0);
469 } /* }}} int network_dispatch_values */
471 static int network_dispatch_notification (notification_t *n) /* {{{ */
472 {
473 int status;
475 assert (n->meta == NULL);
477 status = plugin_notification_meta_add_boolean (n, "network:received", 1);
478 if (status != 0)
479 {
480 ERROR ("network plugin: plugin_notification_meta_add_boolean failed.");
481 plugin_notification_meta_free (n->meta);
482 n->meta = NULL;
483 return (status);
484 }
486 status = plugin_dispatch_notification (n);
488 plugin_notification_meta_free (n->meta);
489 n->meta = NULL;
491 return (status);
492 } /* }}} int network_dispatch_notification */
494 #if HAVE_LIBGCRYPT
495 static void network_init_gcrypt (void) /* {{{ */
496 {
497 gcry_error_t err;
499 /* http://lists.gnupg.org/pipermail/gcrypt-devel/2003-August/000458.html
500 * Because you can't know in a library whether another library has
501 * already initialized the library */
502 if (gcry_control (GCRYCTL_ANY_INITIALIZATION_P))
503 return;
505 /* http://www.gnupg.org/documentation/manuals/gcrypt/Multi_002dThreading.html
506 * To ensure thread-safety, it's important to set GCRYCTL_SET_THREAD_CBS
507 * *before* initalizing Libgcrypt with gcry_check_version(), which itself must
508 * be called before any other gcry_* function. GCRYCTL_ANY_INITIALIZATION_P
509 * above doesn't count, as it doesn't implicitly initalize Libgcrypt.
510 *
511 * tl;dr: keep all these gry_* statements in this exact order please. */
512 # if GCRYPT_VERSION_NUMBER < 0x010600
513 err = gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
514 if (err)
515 {
516 ERROR ("network plugin: gcry_control (GCRYCTL_SET_THREAD_CBS) failed: %s", gcry_strerror (err));
517 abort ();
518 }
519 # endif
521 gcry_check_version (NULL);
523 err = gcry_control (GCRYCTL_INIT_SECMEM, 32768);
524 if (err)
525 {
526 ERROR ("network plugin: gcry_control (GCRYCTL_INIT_SECMEM) failed: %s", gcry_strerror (err));
527 abort ();
528 }
530 gcry_control (GCRYCTL_INITIALIZATION_FINISHED);
531 } /* }}} void network_init_gcrypt */
533 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
534 const void *iv, size_t iv_size, const char *username)
535 {
536 gcry_error_t err;
537 gcry_cipher_hd_t *cyper_ptr;
538 unsigned char password_hash[32];
540 if (se->type == SOCKENT_TYPE_CLIENT)
541 {
542 cyper_ptr = &se->data.client.cypher;
543 memcpy (password_hash, se->data.client.password_hash,
544 sizeof (password_hash));
545 }
546 else
547 {
548 char *secret;
550 cyper_ptr = &se->data.server.cypher;
552 if (username == NULL)
553 return (NULL);
555 secret = fbh_get (se->data.server.userdb, username);
556 if (secret == NULL)
557 return (NULL);
559 gcry_md_hash_buffer (GCRY_MD_SHA256,
560 password_hash,
561 secret, strlen (secret));
563 sfree (secret);
564 }
566 if (*cyper_ptr == NULL)
567 {
568 err = gcry_cipher_open (cyper_ptr,
569 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
570 if (err != 0)
571 {
572 ERROR ("network plugin: gcry_cipher_open returned: %s",
573 gcry_strerror (err));
574 *cyper_ptr = NULL;
575 return (NULL);
576 }
577 }
578 else
579 {
580 gcry_cipher_reset (*cyper_ptr);
581 }
582 assert (*cyper_ptr != NULL);
584 err = gcry_cipher_setkey (*cyper_ptr,
585 password_hash, sizeof (password_hash));
586 if (err != 0)
587 {
588 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
589 gcry_strerror (err));
590 gcry_cipher_close (*cyper_ptr);
591 *cyper_ptr = NULL;
592 return (NULL);
593 }
595 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
596 if (err != 0)
597 {
598 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
599 gcry_strerror (err));
600 gcry_cipher_close (*cyper_ptr);
601 *cyper_ptr = NULL;
602 return (NULL);
603 }
605 return (*cyper_ptr);
606 } /* }}} int network_get_aes256_cypher */
607 #endif /* HAVE_LIBGCRYPT */
609 static int write_part_values (char **ret_buffer, size_t *ret_buffer_len,
610 const data_set_t *ds, const value_list_t *vl)
611 {
612 char *packet_ptr;
613 size_t packet_len;
614 int num_values;
616 part_header_t pkg_ph;
617 uint16_t pkg_num_values;
618 uint8_t *pkg_values_types;
619 value_t *pkg_values;
621 size_t offset;
622 int i;
624 num_values = vl->values_len;
625 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
626 + (num_values * sizeof (uint8_t))
627 + (num_values * sizeof (value_t));
629 if (*ret_buffer_len < packet_len)
630 return (-1);
632 pkg_values_types = malloc (num_values * sizeof (*pkg_values_types));
633 if (pkg_values_types == NULL)
634 {
635 ERROR ("network plugin: write_part_values: malloc failed.");
636 return (-1);
637 }
639 pkg_values = malloc (num_values * sizeof (*pkg_values));
640 if (pkg_values == NULL)
641 {
642 free (pkg_values_types);
643 ERROR ("network plugin: write_part_values: malloc failed.");
644 return (-1);
645 }
647 pkg_ph.type = htons (TYPE_VALUES);
648 pkg_ph.length = htons (packet_len);
650 pkg_num_values = htons ((uint16_t) vl->values_len);
652 for (i = 0; i < num_values; i++)
653 {
654 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
655 switch (ds->ds[i].type)
656 {
657 case DS_TYPE_COUNTER:
658 pkg_values[i].counter = htonll (vl->values[i].counter);
659 break;
661 case DS_TYPE_GAUGE:
662 pkg_values[i].gauge = htond (vl->values[i].gauge);
663 break;
665 case DS_TYPE_DERIVE:
666 pkg_values[i].derive = htonll (vl->values[i].derive);
667 break;
669 case DS_TYPE_ABSOLUTE:
670 pkg_values[i].absolute = htonll (vl->values[i].absolute);
671 break;
673 default:
674 free (pkg_values_types);
675 free (pkg_values);
676 ERROR ("network plugin: write_part_values: "
677 "Unknown data source type: %i",
678 ds->ds[i].type);
679 return (-1);
680 } /* switch (ds->ds[i].type) */
681 } /* for (num_values) */
683 /*
684 * Use `memcpy' to write everything to the buffer, because the pointer
685 * may be unaligned and some architectures, such as SPARC, can't handle
686 * that.
687 */
688 packet_ptr = *ret_buffer;
689 offset = 0;
690 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
691 offset += sizeof (pkg_ph);
692 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
693 offset += sizeof (pkg_num_values);
694 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
695 offset += num_values * sizeof (uint8_t);
696 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
697 offset += num_values * sizeof (value_t);
699 assert (offset == packet_len);
701 *ret_buffer = packet_ptr + packet_len;
702 *ret_buffer_len -= packet_len;
704 free (pkg_values_types);
705 free (pkg_values);
707 return (0);
708 } /* int write_part_values */
710 static int write_part_number (char **ret_buffer, size_t *ret_buffer_len,
711 int type, uint64_t value)
712 {
713 char *packet_ptr;
714 size_t packet_len;
716 part_header_t pkg_head;
717 uint64_t pkg_value;
719 size_t offset;
721 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
723 if (*ret_buffer_len < packet_len)
724 return (-1);
726 pkg_head.type = htons (type);
727 pkg_head.length = htons (packet_len);
728 pkg_value = htonll (value);
730 packet_ptr = *ret_buffer;
731 offset = 0;
732 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
733 offset += sizeof (pkg_head);
734 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
735 offset += sizeof (pkg_value);
737 assert (offset == packet_len);
739 *ret_buffer = packet_ptr + packet_len;
740 *ret_buffer_len -= packet_len;
742 return (0);
743 } /* int write_part_number */
745 static int write_part_string (char **ret_buffer, size_t *ret_buffer_len,
746 int type, const char *str, size_t str_len)
747 {
748 char *buffer;
749 size_t buffer_len;
751 uint16_t pkg_type;
752 uint16_t pkg_length;
754 size_t offset;
756 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
757 if (*ret_buffer_len < buffer_len)
758 return (-1);
760 pkg_type = htons (type);
761 pkg_length = htons (buffer_len);
763 buffer = *ret_buffer;
764 offset = 0;
765 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
766 offset += sizeof (pkg_type);
767 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
768 offset += sizeof (pkg_length);
769 memcpy (buffer + offset, str, str_len);
770 offset += str_len;
771 memset (buffer + offset, '\0', 1);
772 offset += 1;
774 assert (offset == buffer_len);
776 *ret_buffer = buffer + buffer_len;
777 *ret_buffer_len -= buffer_len;
779 return (0);
780 } /* int write_part_string */
782 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
783 value_t **ret_values, size_t *ret_num_values)
784 {
785 char *buffer = *ret_buffer;
786 size_t buffer_len = *ret_buffer_len;
788 uint16_t tmp16;
789 size_t exp_size;
790 size_t i;
792 uint16_t pkg_length;
793 uint16_t pkg_type;
794 size_t pkg_numval;
796 uint8_t *pkg_types;
797 value_t *pkg_values;
799 if (buffer_len < 15)
800 {
801 NOTICE ("network plugin: packet is too short: "
802 "buffer_len = %zu", buffer_len);
803 return (-1);
804 }
806 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
807 buffer += sizeof (tmp16);
808 pkg_type = ntohs (tmp16);
810 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
811 buffer += sizeof (tmp16);
812 pkg_length = ntohs (tmp16);
814 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
815 buffer += sizeof (tmp16);
816 pkg_numval = (size_t) ntohs (tmp16);
818 assert (pkg_type == TYPE_VALUES);
820 exp_size = 3 * sizeof (uint16_t)
821 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
822 if (buffer_len < exp_size)
823 {
824 WARNING ("network plugin: parse_part_values: "
825 "Packet too short: "
826 "Chunk of size %zu expected, "
827 "but buffer has only %zu bytes left.",
828 exp_size, buffer_len);
829 return (-1);
830 }
831 assert (pkg_numval <= ((buffer_len - 6) / 9));
833 if (pkg_length != exp_size)
834 {
835 WARNING ("network plugin: parse_part_values: "
836 "Length and number of values "
837 "in the packet don't match.");
838 return (-1);
839 }
841 pkg_types = calloc (pkg_numval, sizeof (*pkg_types));
842 pkg_values = calloc (pkg_numval, sizeof (*pkg_values));
843 if ((pkg_types == NULL) || (pkg_values == NULL))
844 {
845 sfree (pkg_types);
846 sfree (pkg_values);
847 ERROR ("network plugin: parse_part_values: calloc failed.");
848 return (-1);
849 }
851 memcpy (pkg_types, buffer, pkg_numval * sizeof (*pkg_types));
852 buffer += pkg_numval * sizeof (*pkg_types);
853 memcpy (pkg_values, buffer, pkg_numval * sizeof (*pkg_values));
854 buffer += pkg_numval * sizeof (*pkg_values);
856 for (i = 0; i < pkg_numval; i++)
857 {
858 switch (pkg_types[i])
859 {
860 case DS_TYPE_COUNTER:
861 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
862 break;
864 case DS_TYPE_GAUGE:
865 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
866 break;
868 case DS_TYPE_DERIVE:
869 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
870 break;
872 case DS_TYPE_ABSOLUTE:
873 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
874 break;
876 default:
877 NOTICE ("network plugin: parse_part_values: "
878 "Don't know how to handle data source type %"PRIu8,
879 pkg_types[i]);
880 sfree (pkg_types);
881 sfree (pkg_values);
882 return (-1);
883 } /* switch (pkg_types[i]) */
884 }
886 *ret_buffer = buffer;
887 *ret_buffer_len = buffer_len - pkg_length;
888 *ret_num_values = pkg_numval;
889 *ret_values = pkg_values;
891 sfree (pkg_types);
893 return (0);
894 } /* int parse_part_values */
896 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
897 uint64_t *value)
898 {
899 char *buffer = *ret_buffer;
900 size_t buffer_len = *ret_buffer_len;
902 uint16_t tmp16;
903 uint64_t tmp64;
904 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
906 uint16_t pkg_length;
908 if (buffer_len < exp_size)
909 {
910 WARNING ("network plugin: parse_part_number: "
911 "Packet too short: "
912 "Chunk of size %zu expected, "
913 "but buffer has only %zu bytes left.",
914 exp_size, buffer_len);
915 return (-1);
916 }
918 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
919 buffer += sizeof (tmp16);
920 /* pkg_type = ntohs (tmp16); */
922 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
923 buffer += sizeof (tmp16);
924 pkg_length = ntohs (tmp16);
926 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
927 buffer += sizeof (tmp64);
928 *value = ntohll (tmp64);
930 *ret_buffer = buffer;
931 *ret_buffer_len = buffer_len - pkg_length;
933 return (0);
934 } /* int parse_part_number */
936 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
937 char *output, size_t const output_len)
938 {
939 char *buffer = *ret_buffer;
940 size_t buffer_len = *ret_buffer_len;
942 uint16_t tmp16;
943 size_t const header_size = 2 * sizeof (uint16_t);
945 uint16_t pkg_length;
946 size_t payload_size;
948 if (output_len == 0)
949 return (EINVAL);
951 if (buffer_len < header_size)
952 {
953 WARNING ("network plugin: parse_part_string: "
954 "Packet too short: "
955 "Chunk of at least size %zu expected, "
956 "but buffer has only %zu bytes left.",
957 header_size, buffer_len);
958 return (-1);
959 }
961 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
962 buffer += sizeof (tmp16);
963 /* pkg_type = ntohs (tmp16); */
965 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
966 buffer += sizeof (tmp16);
967 pkg_length = ntohs (tmp16);
968 payload_size = ((size_t) pkg_length) - header_size;
970 /* Check that packet fits in the input buffer */
971 if (pkg_length > buffer_len)
972 {
973 WARNING ("network plugin: parse_part_string: "
974 "Packet too big: "
975 "Chunk of size %"PRIu16" received, "
976 "but buffer has only %zu bytes left.",
977 pkg_length, buffer_len);
978 return (-1);
979 }
981 /* Check that pkg_length is in the valid range */
982 if (pkg_length <= header_size)
983 {
984 WARNING ("network plugin: parse_part_string: "
985 "Packet too short: "
986 "Header claims this packet is only %hu "
987 "bytes long.", pkg_length);
988 return (-1);
989 }
991 /* Check that the package data fits into the output buffer.
992 * The previous if-statement ensures that:
993 * `pkg_length > header_size' */
994 if (output_len < payload_size)
995 {
996 WARNING ("network plugin: parse_part_string: "
997 "Buffer too small: "
998 "Output buffer holds %zu bytes, "
999 "which is too small to hold the received "
1000 "%zu byte string.",
1001 output_len, payload_size);
1002 return (-1);
1003 }
1005 /* All sanity checks successfull, let's copy the data over */
1006 memcpy ((void *) output, (void *) buffer, payload_size);
1007 buffer += payload_size;
1009 /* For some very weird reason '\0' doesn't do the trick on SPARC in
1010 * this statement. */
1011 if (output[payload_size - 1] != 0)
1012 {
1013 WARNING ("network plugin: parse_part_string: "
1014 "Received string does not end "
1015 "with a NULL-byte.");
1016 return (-1);
1017 }
1019 *ret_buffer = buffer;
1020 *ret_buffer_len = buffer_len - pkg_length;
1022 return (0);
1023 } /* int parse_part_string */
1025 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
1026 * parse_packet and vice versa. */
1027 #define PP_SIGNED 0x01
1028 #define PP_ENCRYPTED 0x02
1029 static int parse_packet (sockent_t *se,
1030 void *buffer, size_t buffer_size, int flags,
1031 const char *username);
1033 #define BUFFER_READ(p,s) do { \
1034 memcpy ((p), buffer + buffer_offset, (s)); \
1035 buffer_offset += (s); \
1036 } while (0)
1038 #if HAVE_LIBGCRYPT
1039 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1040 void **ret_buffer, size_t *ret_buffer_len, int flags)
1041 {
1042 static c_complain_t complain_no_users = C_COMPLAIN_INIT_STATIC;
1044 char *buffer;
1045 size_t buffer_len;
1046 size_t buffer_offset;
1048 size_t username_len;
1049 char *secret;
1051 part_signature_sha256_t pss;
1052 uint16_t pss_head_length;
1053 char hash[sizeof (pss.hash)];
1055 gcry_md_hd_t hd;
1056 gcry_error_t err;
1057 unsigned char *hash_ptr;
1059 buffer = *ret_buffer;
1060 buffer_len = *ret_buffer_len;
1061 buffer_offset = 0;
1063 if (se->data.server.userdb == NULL)
1064 {
1065 c_complain (LOG_NOTICE, &complain_no_users,
1066 "network plugin: Received signed network packet but can't verify it "
1067 "because no user DB has been configured. Will accept it.");
1068 return (0);
1069 }
1071 /* Check if the buffer has enough data for this structure. */
1072 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
1073 return (-ENOMEM);
1075 /* Read type and length header */
1076 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1077 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1078 pss_head_length = ntohs (pss.head.length);
1080 /* Check if the `pss_head_length' is within bounds. */
1081 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
1082 || (pss_head_length > buffer_len))
1083 {
1084 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
1085 return (-1);
1086 }
1088 /* Copy the hash. */
1089 BUFFER_READ (pss.hash, sizeof (pss.hash));
1091 /* Calculate username length (without null byte) and allocate memory */
1092 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
1093 pss.username = malloc (username_len + 1);
1094 if (pss.username == NULL)
1095 return (-ENOMEM);
1097 /* Read the username */
1098 BUFFER_READ (pss.username, username_len);
1099 pss.username[username_len] = 0;
1101 assert (buffer_offset == pss_head_length);
1103 /* Query the password */
1104 secret = fbh_get (se->data.server.userdb, pss.username);
1105 if (secret == NULL)
1106 {
1107 ERROR ("network plugin: Unknown user: %s", pss.username);
1108 sfree (pss.username);
1109 return (-ENOENT);
1110 }
1112 /* Create a hash device and check the HMAC */
1113 hd = NULL;
1114 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
1115 if (err != 0)
1116 {
1117 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
1118 gcry_strerror (err));
1119 sfree (secret);
1120 sfree (pss.username);
1121 return (-1);
1122 }
1124 err = gcry_md_setkey (hd, secret, strlen (secret));
1125 if (err != 0)
1126 {
1127 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
1128 gcry_md_close (hd);
1129 sfree (secret);
1130 sfree (pss.username);
1131 return (-1);
1132 }
1134 gcry_md_write (hd,
1135 buffer + PART_SIGNATURE_SHA256_SIZE,
1136 buffer_len - PART_SIGNATURE_SHA256_SIZE);
1137 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
1138 if (hash_ptr == NULL)
1139 {
1140 ERROR ("network plugin: gcry_md_read failed.");
1141 gcry_md_close (hd);
1142 sfree (secret);
1143 sfree (pss.username);
1144 return (-1);
1145 }
1146 memcpy (hash, hash_ptr, sizeof (hash));
1148 /* Clean up */
1149 gcry_md_close (hd);
1150 hd = NULL;
1152 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1153 {
1154 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1155 "Hash mismatch.");
1156 }
1157 else
1158 {
1159 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1160 flags | PP_SIGNED, pss.username);
1161 }
1163 sfree (secret);
1164 sfree (pss.username);
1166 *ret_buffer = buffer + buffer_len;
1167 *ret_buffer_len = 0;
1169 return (0);
1170 } /* }}} int parse_part_sign_sha256 */
1171 /* #endif HAVE_LIBGCRYPT */
1173 #else /* if !HAVE_LIBGCRYPT */
1174 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1175 void **ret_buffer, size_t *ret_buffer_size, int flags)
1176 {
1177 static int warning_has_been_printed = 0;
1179 char *buffer;
1180 size_t buffer_size;
1181 size_t buffer_offset;
1182 uint16_t part_len;
1184 part_signature_sha256_t pss;
1186 buffer = *ret_buffer;
1187 buffer_size = *ret_buffer_size;
1188 buffer_offset = 0;
1190 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1191 return (-ENOMEM);
1193 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1194 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1195 part_len = ntohs (pss.head.length);
1197 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1198 || (part_len > buffer_size))
1199 return (-EINVAL);
1201 if (warning_has_been_printed == 0)
1202 {
1203 WARNING ("network plugin: Received signed packet, but the network "
1204 "plugin was not linked with libgcrypt, so I cannot "
1205 "verify the signature. The packet will be accepted.");
1206 warning_has_been_printed = 1;
1207 }
1209 parse_packet (se, buffer + part_len, buffer_size - part_len, flags,
1210 /* username = */ NULL);
1212 *ret_buffer = buffer + buffer_size;
1213 *ret_buffer_size = 0;
1215 return (0);
1216 } /* }}} int parse_part_sign_sha256 */
1217 #endif /* !HAVE_LIBGCRYPT */
1219 #if HAVE_LIBGCRYPT
1220 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1221 void **ret_buffer, size_t *ret_buffer_len,
1222 int flags)
1223 {
1224 char *buffer = *ret_buffer;
1225 size_t buffer_len = *ret_buffer_len;
1226 size_t payload_len;
1227 size_t part_size;
1228 size_t buffer_offset;
1229 uint16_t username_len;
1230 part_encryption_aes256_t pea;
1231 unsigned char hash[sizeof (pea.hash)] = { 0 };
1233 gcry_cipher_hd_t cypher;
1234 gcry_error_t err;
1236 /* Make sure at least the header if available. */
1237 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1238 {
1239 NOTICE ("network plugin: parse_part_encr_aes256: "
1240 "Discarding short packet.");
1241 return (-1);
1242 }
1244 buffer_offset = 0;
1246 /* Copy the unencrypted information into `pea'. */
1247 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1248 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1250 /* Check the `part size'. */
1251 part_size = ntohs (pea.head.length);
1252 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1253 || (part_size > buffer_len))
1254 {
1255 NOTICE ("network plugin: parse_part_encr_aes256: "
1256 "Discarding part with invalid size.");
1257 return (-1);
1258 }
1260 /* Read the username */
1261 BUFFER_READ (&username_len, sizeof (username_len));
1262 username_len = ntohs (username_len);
1264 if ((username_len == 0)
1265 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1266 {
1267 NOTICE ("network plugin: parse_part_encr_aes256: "
1268 "Discarding part with invalid username length.");
1269 return (-1);
1270 }
1272 assert (username_len > 0);
1273 pea.username = malloc (username_len + 1);
1274 if (pea.username == NULL)
1275 return (-ENOMEM);
1276 BUFFER_READ (pea.username, username_len);
1277 pea.username[username_len] = 0;
1279 /* Last but not least, the initialization vector */
1280 BUFFER_READ (pea.iv, sizeof (pea.iv));
1282 /* Make sure we are at the right position */
1283 assert (buffer_offset == (username_len +
1284 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1286 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1287 pea.username);
1288 if (cypher == NULL)
1289 {
1290 sfree (pea.username);
1291 return (-1);
1292 }
1294 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1295 assert (payload_len > 0);
1297 /* Decrypt the packet in-place */
1298 err = gcry_cipher_decrypt (cypher,
1299 buffer + buffer_offset,
1300 part_size - buffer_offset,
1301 /* in = */ NULL, /* in len = */ 0);
1302 if (err != 0)
1303 {
1304 sfree (pea.username);
1305 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1306 gcry_strerror (err));
1307 return (-1);
1308 }
1310 /* Read the hash */
1311 BUFFER_READ (pea.hash, sizeof (pea.hash));
1313 /* Make sure we're at the right position - again */
1314 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1315 assert (buffer_offset == (part_size - payload_len));
1317 /* Check hash sum */
1318 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1319 buffer + buffer_offset, payload_len);
1320 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1321 {
1322 sfree (pea.username);
1323 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1324 return (-1);
1325 }
1327 parse_packet (se, buffer + buffer_offset, payload_len,
1328 flags | PP_ENCRYPTED, pea.username);
1330 /* XXX: Free pea.username?!? */
1332 /* Update return values */
1333 *ret_buffer = buffer + part_size;
1334 *ret_buffer_len = buffer_len - part_size;
1336 sfree (pea.username);
1338 return (0);
1339 } /* }}} int parse_part_encr_aes256 */
1340 /* #endif HAVE_LIBGCRYPT */
1342 #else /* if !HAVE_LIBGCRYPT */
1343 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1344 void **ret_buffer, size_t *ret_buffer_size, int flags)
1345 {
1346 static int warning_has_been_printed = 0;
1348 char *buffer;
1349 size_t buffer_size;
1350 size_t buffer_offset;
1352 part_header_t ph;
1353 size_t ph_length;
1355 buffer = *ret_buffer;
1356 buffer_size = *ret_buffer_size;
1357 buffer_offset = 0;
1359 /* parse_packet assures this minimum size. */
1360 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1362 BUFFER_READ (&ph.type, sizeof (ph.type));
1363 BUFFER_READ (&ph.length, sizeof (ph.length));
1364 ph_length = ntohs (ph.length);
1366 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1367 || (ph_length > buffer_size))
1368 {
1369 ERROR ("network plugin: AES-256 encrypted part "
1370 "with invalid length received.");
1371 return (-1);
1372 }
1374 if (warning_has_been_printed == 0)
1375 {
1376 WARNING ("network plugin: Received encrypted packet, but the network "
1377 "plugin was not linked with libgcrypt, so I cannot "
1378 "decrypt it. The part will be discarded.");
1379 warning_has_been_printed = 1;
1380 }
1382 *ret_buffer = (void *) (((char *) *ret_buffer) + ph_length);
1383 *ret_buffer_size -= ph_length;
1385 return (0);
1386 } /* }}} int parse_part_encr_aes256 */
1387 #endif /* !HAVE_LIBGCRYPT */
1389 #undef BUFFER_READ
1391 static int parse_packet (sockent_t *se, /* {{{ */
1392 void *buffer, size_t buffer_size, int flags,
1393 const char *username)
1394 {
1395 int status;
1397 value_list_t vl = VALUE_LIST_INIT;
1398 notification_t n = { 0 };
1400 #if HAVE_LIBGCRYPT
1401 int packet_was_signed = (flags & PP_SIGNED);
1402 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1403 int printed_ignore_warning = 0;
1404 #endif /* HAVE_LIBGCRYPT */
1407 memset (&vl, '\0', sizeof (vl));
1408 status = 0;
1410 while ((status == 0) && (0 < buffer_size)
1411 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1412 {
1413 uint16_t pkg_length;
1414 uint16_t pkg_type;
1416 memcpy ((void *) &pkg_type,
1417 (void *) buffer,
1418 sizeof (pkg_type));
1419 memcpy ((void *) &pkg_length,
1420 (void *) (((char *) buffer) + sizeof (pkg_type)),
1421 sizeof (pkg_length));
1423 pkg_length = ntohs (pkg_length);
1424 pkg_type = ntohs (pkg_type);
1426 if (pkg_length > buffer_size)
1427 break;
1428 /* Ensure that this loop terminates eventually */
1429 if (pkg_length < (2 * sizeof (uint16_t)))
1430 break;
1432 if (pkg_type == TYPE_ENCR_AES256)
1433 {
1434 status = parse_part_encr_aes256 (se,
1435 &buffer, &buffer_size, flags);
1436 if (status != 0)
1437 {
1438 ERROR ("network plugin: Decrypting AES256 "
1439 "part failed "
1440 "with status %i.", status);
1441 break;
1442 }
1443 }
1444 #if HAVE_LIBGCRYPT
1445 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1446 && (packet_was_encrypted == 0))
1447 {
1448 if (printed_ignore_warning == 0)
1449 {
1450 INFO ("network plugin: Unencrypted packet or "
1451 "part has been ignored.");
1452 printed_ignore_warning = 1;
1453 }
1454 buffer = ((char *) buffer) + pkg_length;
1455 buffer_size -= (size_t) pkg_length;
1456 continue;
1457 }
1458 #endif /* HAVE_LIBGCRYPT */
1459 else if (pkg_type == TYPE_SIGN_SHA256)
1460 {
1461 status = parse_part_sign_sha256 (se,
1462 &buffer, &buffer_size, flags);
1463 if (status != 0)
1464 {
1465 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1466 "signature failed "
1467 "with status %i.", status);
1468 break;
1469 }
1470 }
1471 #if HAVE_LIBGCRYPT
1472 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1473 && (packet_was_encrypted == 0)
1474 && (packet_was_signed == 0))
1475 {
1476 if (printed_ignore_warning == 0)
1477 {
1478 INFO ("network plugin: Unsigned packet or "
1479 "part has been ignored.");
1480 printed_ignore_warning = 1;
1481 }
1482 buffer = ((char *) buffer) + pkg_length;
1483 buffer_size -= (size_t) pkg_length;
1484 continue;
1485 }
1486 #endif /* HAVE_LIBGCRYPT */
1487 else if (pkg_type == TYPE_VALUES)
1488 {
1489 status = parse_part_values (&buffer, &buffer_size,
1490 &vl.values, &vl.values_len);
1491 if (status != 0)
1492 break;
1494 network_dispatch_values (&vl, username);
1496 sfree (vl.values);
1497 }
1498 else if (pkg_type == TYPE_TIME)
1499 {
1500 uint64_t tmp = 0;
1501 status = parse_part_number (&buffer, &buffer_size,
1502 &tmp);
1503 if (status == 0)
1504 {
1505 vl.time = TIME_T_TO_CDTIME_T (tmp);
1506 n.time = TIME_T_TO_CDTIME_T (tmp);
1507 }
1508 }
1509 else if (pkg_type == TYPE_TIME_HR)
1510 {
1511 uint64_t tmp = 0;
1512 status = parse_part_number (&buffer, &buffer_size,
1513 &tmp);
1514 if (status == 0)
1515 {
1516 vl.time = (cdtime_t) tmp;
1517 n.time = (cdtime_t) tmp;
1518 }
1519 }
1520 else if (pkg_type == TYPE_INTERVAL)
1521 {
1522 uint64_t tmp = 0;
1523 status = parse_part_number (&buffer, &buffer_size,
1524 &tmp);
1525 if (status == 0)
1526 vl.interval = TIME_T_TO_CDTIME_T (tmp);
1527 }
1528 else if (pkg_type == TYPE_INTERVAL_HR)
1529 {
1530 uint64_t tmp = 0;
1531 status = parse_part_number (&buffer, &buffer_size,
1532 &tmp);
1533 if (status == 0)
1534 vl.interval = (cdtime_t) tmp;
1535 }
1536 else if (pkg_type == TYPE_HOST)
1537 {
1538 status = parse_part_string (&buffer, &buffer_size,
1539 vl.host, sizeof (vl.host));
1540 if (status == 0)
1541 sstrncpy (n.host, vl.host, sizeof (n.host));
1542 }
1543 else if (pkg_type == TYPE_PLUGIN)
1544 {
1545 status = parse_part_string (&buffer, &buffer_size,
1546 vl.plugin, sizeof (vl.plugin));
1547 if (status == 0)
1548 sstrncpy (n.plugin, vl.plugin,
1549 sizeof (n.plugin));
1550 }
1551 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1552 {
1553 status = parse_part_string (&buffer, &buffer_size,
1554 vl.plugin_instance,
1555 sizeof (vl.plugin_instance));
1556 if (status == 0)
1557 sstrncpy (n.plugin_instance,
1558 vl.plugin_instance,
1559 sizeof (n.plugin_instance));
1560 }
1561 else if (pkg_type == TYPE_TYPE)
1562 {
1563 status = parse_part_string (&buffer, &buffer_size,
1564 vl.type, sizeof (vl.type));
1565 if (status == 0)
1566 sstrncpy (n.type, vl.type, sizeof (n.type));
1567 }
1568 else if (pkg_type == TYPE_TYPE_INSTANCE)
1569 {
1570 status = parse_part_string (&buffer, &buffer_size,
1571 vl.type_instance,
1572 sizeof (vl.type_instance));
1573 if (status == 0)
1574 sstrncpy (n.type_instance, vl.type_instance,
1575 sizeof (n.type_instance));
1576 }
1577 else if (pkg_type == TYPE_MESSAGE)
1578 {
1579 status = parse_part_string (&buffer, &buffer_size,
1580 n.message, sizeof (n.message));
1582 if (status != 0)
1583 {
1584 /* do nothing */
1585 }
1586 else if ((n.severity != NOTIF_FAILURE)
1587 && (n.severity != NOTIF_WARNING)
1588 && (n.severity != NOTIF_OKAY))
1589 {
1590 INFO ("network plugin: "
1591 "Ignoring notification with "
1592 "unknown severity %i.",
1593 n.severity);
1594 }
1595 else if (n.time == 0)
1596 {
1597 INFO ("network plugin: "
1598 "Ignoring notification with "
1599 "time == 0.");
1600 }
1601 else if (strlen (n.message) == 0)
1602 {
1603 INFO ("network plugin: "
1604 "Ignoring notification with "
1605 "an empty message.");
1606 }
1607 else
1608 {
1609 network_dispatch_notification (&n);
1610 }
1611 }
1612 else if (pkg_type == TYPE_SEVERITY)
1613 {
1614 uint64_t tmp = 0;
1615 status = parse_part_number (&buffer, &buffer_size,
1616 &tmp);
1617 if (status == 0)
1618 n.severity = (int) tmp;
1619 }
1620 else
1621 {
1622 DEBUG ("network plugin: parse_packet: Unknown part"
1623 " type: 0x%04hx", pkg_type);
1624 buffer = ((char *) buffer) + pkg_length;
1625 buffer_size -= (size_t) pkg_length;
1626 }
1627 } /* while (buffer_size > sizeof (part_header_t)) */
1629 if (status == 0 && buffer_size > 0)
1630 WARNING ("network plugin: parse_packet: Received truncated "
1631 "packet, try increasing `MaxPacketSize'");
1633 return (status);
1634 } /* }}} int parse_packet */
1636 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1637 {
1638 if (sec->fd >= 0)
1639 {
1640 close (sec->fd);
1641 sec->fd = -1;
1642 }
1643 sfree (sec->addr);
1644 #if HAVE_LIBGCRYPT
1645 sfree (sec->username);
1646 sfree (sec->password);
1647 if (sec->cypher != NULL)
1648 gcry_cipher_close (sec->cypher);
1649 #endif
1650 } /* }}} void free_sockent_client */
1652 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1653 {
1654 size_t i;
1656 for (i = 0; i < ses->fd_num; i++)
1657 {
1658 if (ses->fd[i] >= 0)
1659 {
1660 close (ses->fd[i]);
1661 ses->fd[i] = -1;
1662 }
1663 }
1665 sfree (ses->fd);
1666 #if HAVE_LIBGCRYPT
1667 sfree (ses->auth_file);
1668 fbh_destroy (ses->userdb);
1669 if (ses->cypher != NULL)
1670 gcry_cipher_close (ses->cypher);
1671 #endif
1672 } /* }}} void free_sockent_server */
1674 static void sockent_destroy (sockent_t *se) /* {{{ */
1675 {
1676 sockent_t *next;
1678 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1680 while (se != NULL)
1681 {
1682 next = se->next;
1684 sfree (se->node);
1685 sfree (se->service);
1687 if (se->type == SOCKENT_TYPE_CLIENT)
1688 free_sockent_client (&se->data.client);
1689 else
1690 free_sockent_server (&se->data.server);
1692 sfree (se);
1693 se = next;
1694 }
1695 } /* }}} void sockent_destroy */
1697 /*
1698 * int network_set_ttl
1699 *
1700 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1701 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1702 *
1703 * The `struct addrinfo' is used to destinguish between unicast and multicast
1704 * sockets.
1705 */
1706 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1707 {
1708 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1709 network_config_ttl);
1711 assert (se->type == SOCKENT_TYPE_CLIENT);
1713 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1714 return (-1);
1716 if (ai->ai_family == AF_INET)
1717 {
1718 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1719 int optname;
1721 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1722 optname = IP_MULTICAST_TTL;
1723 else
1724 optname = IP_TTL;
1726 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1727 &network_config_ttl,
1728 sizeof (network_config_ttl)) != 0)
1729 {
1730 char errbuf[1024];
1731 ERROR ("network plugin: setsockopt (ipv4-ttl): %s",
1732 sstrerror (errno, errbuf, sizeof (errbuf)));
1733 return (-1);
1734 }
1735 }
1736 else if (ai->ai_family == AF_INET6)
1737 {
1738 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1739 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1740 int optname;
1742 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1743 optname = IPV6_MULTICAST_HOPS;
1744 else
1745 optname = IPV6_UNICAST_HOPS;
1747 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1748 &network_config_ttl,
1749 sizeof (network_config_ttl)) != 0)
1750 {
1751 char errbuf[1024];
1752 ERROR ("network plugin: setsockopt(ipv6-ttl): %s",
1753 sstrerror (errno, errbuf,
1754 sizeof (errbuf)));
1755 return (-1);
1756 }
1757 }
1759 return (0);
1760 } /* int network_set_ttl */
1762 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1763 {
1764 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1765 se->interface);
1767 assert (se->type == SOCKENT_TYPE_CLIENT);
1769 if (ai->ai_family == AF_INET)
1770 {
1771 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1773 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1774 {
1775 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1776 /* If possible, use the "ip_mreqn" structure which has
1777 * an "interface index" member. Using the interface
1778 * index is preferred here, because of its similarity
1779 * to the way IPv6 handles this. Unfortunately, it
1780 * appears not to be portable. */
1781 struct ip_mreqn mreq = {
1782 .imr_multiaddr.s_addr = addr->sin_addr.s_addr,
1783 .imr_address.s_addr = ntohl (INADDR_ANY),
1784 .imr_ifindex = se->interface
1785 };
1786 #else
1787 struct ip_mreq mreq = {
1788 .imr_multiaddr.s_addr = addr->sin_addr.s_addr,
1789 .imr_interface.s_addr = ntohl (INADDR_ANY)
1790 };
1791 #endif
1793 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1794 &mreq, sizeof (mreq)) != 0)
1795 {
1796 char errbuf[1024];
1797 ERROR ("network plugin: setsockopt (ipv4-multicast-if): %s",
1798 sstrerror (errno, errbuf, sizeof (errbuf)));
1799 return (-1);
1800 }
1802 return (0);
1803 }
1804 }
1805 else if (ai->ai_family == AF_INET6)
1806 {
1807 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1809 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1810 {
1811 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1812 &se->interface,
1813 sizeof (se->interface)) != 0)
1814 {
1815 char errbuf[1024];
1816 ERROR ("network plugin: setsockopt (ipv6-multicast-if): %s",
1817 sstrerror (errno, errbuf,
1818 sizeof (errbuf)));
1819 return (-1);
1820 }
1822 return (0);
1823 }
1824 }
1826 /* else: Not a multicast interface. */
1827 if (se->interface != 0)
1828 {
1829 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1830 char interface_name[IFNAMSIZ];
1832 if (if_indextoname (se->interface, interface_name) == NULL)
1833 return (-1);
1835 DEBUG ("network plugin: Binding socket to interface %s", interface_name);
1837 if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
1838 interface_name,
1839 sizeof(interface_name)) == -1 )
1840 {
1841 char errbuf[1024];
1842 ERROR ("network plugin: setsockopt (bind-if): %s",
1843 sstrerror (errno, errbuf, sizeof (errbuf)));
1844 return (-1);
1845 }
1846 /* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1848 #else
1849 WARNING ("network plugin: Cannot set the interface on a unicast "
1850 "socket because "
1851 # if !defined(SO_BINDTODEVICE)
1852 "the \"SO_BINDTODEVICE\" socket option "
1853 # else
1854 "the \"if_indextoname\" function "
1855 # endif
1856 "is not available on your system.");
1857 #endif
1859 }
1861 return (0);
1862 } /* }}} network_set_interface */
1864 static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
1865 {
1866 #if KERNEL_SOLARIS
1867 char loop = 0;
1868 #else
1869 int loop = 0;
1870 #endif
1871 int yes = 1;
1873 /* allow multiple sockets to use the same PORT number */
1874 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1875 &yes, sizeof(yes)) == -1) {
1876 char errbuf[1024];
1877 ERROR ("network plugin: setsockopt (reuseaddr): %s",
1878 sstrerror (errno, errbuf, sizeof (errbuf)));
1879 return (-1);
1880 }
1882 DEBUG ("fd = %i; calling `bind'", fd);
1884 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1885 {
1886 char errbuf[1024];
1887 ERROR ("bind: %s",
1888 sstrerror (errno, errbuf, sizeof (errbuf)));
1889 return (-1);
1890 }
1892 if (ai->ai_family == AF_INET)
1893 {
1894 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1895 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1896 {
1897 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1898 struct ip_mreqn mreq;
1899 #else
1900 struct ip_mreq mreq;
1901 #endif
1903 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1905 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1906 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1907 /* Set the interface using the interface index if
1908 * possible (available). Unfortunately, the struct
1909 * ip_mreqn is not portable. */
1910 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1911 mreq.imr_ifindex = interface_idx;
1912 #else
1913 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1914 #endif
1916 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1917 &loop, sizeof (loop)) == -1)
1918 {
1919 char errbuf[1024];
1920 ERROR ("network plugin: setsockopt (multicast-loop): %s",
1921 sstrerror (errno, errbuf,
1922 sizeof (errbuf)));
1923 return (-1);
1924 }
1926 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1927 &mreq, sizeof (mreq)) == -1)
1928 {
1929 char errbuf[1024];
1930 ERROR ("network plugin: setsockopt (add-membership): %s",
1931 sstrerror (errno, errbuf,
1932 sizeof (errbuf)));
1933 return (-1);
1934 }
1936 return (0);
1937 }
1938 }
1939 else if (ai->ai_family == AF_INET6)
1940 {
1941 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1942 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1943 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1944 {
1945 struct ipv6_mreq mreq;
1947 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1949 memcpy (&mreq.ipv6mr_multiaddr,
1950 &addr->sin6_addr,
1951 sizeof (addr->sin6_addr));
1953 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1954 * ipv6mr_interface may be set to zeroes to
1955 * choose the default multicast interface or to
1956 * the index of a particular multicast-capable
1957 * interface if the host is multihomed.
1958 * Membership is associ-associated with a
1959 * single interface; programs running on
1960 * multihomed hosts may need to join the same
1961 * group on more than one interface.*/
1962 mreq.ipv6mr_interface = interface_idx;
1964 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1965 &loop, sizeof (loop)) == -1)
1966 {
1967 char errbuf[1024];
1968 ERROR ("network plugin: setsockopt (ipv6-multicast-loop): %s",
1969 sstrerror (errno, errbuf,
1970 sizeof (errbuf)));
1971 return (-1);
1972 }
1974 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1975 &mreq, sizeof (mreq)) == -1)
1976 {
1977 char errbuf[1024];
1978 ERROR ("network plugin: setsockopt (ipv6-add-membership): %s",
1979 sstrerror (errno, errbuf,
1980 sizeof (errbuf)));
1981 return (-1);
1982 }
1984 return (0);
1985 }
1986 }
1988 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1989 /* if a specific interface was set, bind the socket to it. But to avoid
1990 * possible problems with multicast routing, only do that for non-multicast
1991 * addresses */
1992 if (interface_idx != 0)
1993 {
1994 char interface_name[IFNAMSIZ];
1996 if (if_indextoname (interface_idx, interface_name) == NULL)
1997 return (-1);
1999 DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
2001 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
2002 interface_name,
2003 sizeof(interface_name)) == -1 )
2004 {
2005 char errbuf[1024];
2006 ERROR ("network plugin: setsockopt (bind-if): %s",
2007 sstrerror (errno, errbuf, sizeof (errbuf)));
2008 return (-1);
2009 }
2010 }
2011 #endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
2013 return (0);
2014 } /* int network_bind_socket */
2016 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
2017 * or `SOCKENT_TYPE_SERVER' */
2018 static sockent_t *sockent_create (int type) /* {{{ */
2019 {
2020 sockent_t *se;
2022 if ((type != SOCKENT_TYPE_CLIENT) && (type != SOCKENT_TYPE_SERVER))
2023 return (NULL);
2025 se = calloc (1, sizeof (*se));
2026 if (se == NULL)
2027 return (NULL);
2029 se->type = type;
2030 se->node = NULL;
2031 se->service = NULL;
2032 se->interface = 0;
2033 se->next = NULL;
2035 if (type == SOCKENT_TYPE_SERVER)
2036 {
2037 se->data.server.fd = NULL;
2038 se->data.server.fd_num = 0;
2039 #if HAVE_LIBGCRYPT
2040 se->data.server.security_level = SECURITY_LEVEL_NONE;
2041 se->data.server.auth_file = NULL;
2042 se->data.server.userdb = NULL;
2043 se->data.server.cypher = NULL;
2044 #endif
2045 }
2046 else
2047 {
2048 se->data.client.fd = -1;
2049 se->data.client.addr = NULL;
2050 se->data.client.resolve_interval = 0;
2051 se->data.client.next_resolve_reconnect = 0;
2052 #if HAVE_LIBGCRYPT
2053 se->data.client.security_level = SECURITY_LEVEL_NONE;
2054 se->data.client.username = NULL;
2055 se->data.client.password = NULL;
2056 se->data.client.cypher = NULL;
2057 #endif
2058 }
2060 return (se);
2061 } /* }}} sockent_t *sockent_create */
2063 static int sockent_init_crypto (sockent_t *se) /* {{{ */
2064 {
2065 #if HAVE_LIBGCRYPT /* {{{ */
2066 if (se->type == SOCKENT_TYPE_CLIENT)
2067 {
2068 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
2069 {
2070 network_init_gcrypt ();
2072 if ((se->data.client.username == NULL)
2073 || (se->data.client.password == NULL))
2074 {
2075 ERROR ("network plugin: Client socket with "
2076 "security requested, but no "
2077 "credentials are configured.");
2078 return (-1);
2079 }
2080 gcry_md_hash_buffer (GCRY_MD_SHA256,
2081 se->data.client.password_hash,
2082 se->data.client.password,
2083 strlen (se->data.client.password));
2084 }
2085 }
2086 else /* (se->type == SOCKENT_TYPE_SERVER) */
2087 {
2088 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2089 {
2090 network_init_gcrypt ();
2092 if (se->data.server.auth_file == NULL)
2093 {
2094 ERROR ("network plugin: Server socket with "
2095 "security requested, but no "
2096 "password file is configured.");
2097 return (-1);
2098 }
2099 }
2100 if (se->data.server.auth_file != NULL)
2101 {
2102 se->data.server.userdb = fbh_create (se->data.server.auth_file);
2103 if (se->data.server.userdb == NULL)
2104 {
2105 ERROR ("network plugin: Reading password file "
2106 "`%s' failed.",
2107 se->data.server.auth_file);
2108 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2109 return (-1);
2110 }
2111 }
2112 }
2113 #endif /* }}} HAVE_LIBGCRYPT */
2115 return (0);
2116 } /* }}} int sockent_init_crypto */
2118 static int sockent_client_disconnect (sockent_t *se) /* {{{ */
2119 {
2120 struct sockent_client *client;
2122 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2123 return (EINVAL);
2125 client = &se->data.client;
2126 if (client->fd >= 0) /* connected */
2127 {
2128 close (client->fd);
2129 client->fd = -1;
2130 }
2132 sfree (client->addr);
2133 client->addrlen = 0;
2135 return (0);
2136 } /* }}} int sockent_client_disconnect */
2138 static int sockent_client_connect (sockent_t *se) /* {{{ */
2139 {
2140 static c_complain_t complaint = C_COMPLAIN_INIT_STATIC;
2142 struct sockent_client *client;
2143 struct addrinfo ai_hints = { 0 };
2144 struct addrinfo *ai_list = NULL, *ai_ptr;
2145 int status;
2146 _Bool reconnect = 0;
2147 cdtime_t now;
2149 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2150 return (EINVAL);
2152 client = &se->data.client;
2154 now = cdtime ();
2155 if (client->resolve_interval != 0 && client->next_resolve_reconnect < now) {
2156 DEBUG("network plugin: Reconnecting socket, resolve_interval = %lf, next_resolve_reconnect = %lf",
2157 CDTIME_T_TO_DOUBLE(client->resolve_interval), CDTIME_T_TO_DOUBLE(client->next_resolve_reconnect));
2158 reconnect = 1;
2159 }
2161 if (client->fd >= 0 && !reconnect) /* already connected and not stale*/
2162 return (0);
2164 #ifdef AI_ADDRCONFIG
2165 ai_hints.ai_flags |= AI_ADDRCONFIG;
2166 #endif
2167 ai_hints.ai_family = AF_UNSPEC;
2168 ai_hints.ai_socktype = SOCK_DGRAM;
2169 ai_hints.ai_protocol = IPPROTO_UDP;
2171 status = getaddrinfo (se->node,
2172 (se->service != NULL) ? se->service : NET_DEFAULT_PORT,
2173 &ai_hints, &ai_list);
2174 if (status != 0)
2175 {
2176 c_complain (LOG_ERR, &complaint,
2177 "network plugin: getaddrinfo (%s, %s) failed: %s",
2178 (se->node == NULL) ? "(null)" : se->node,
2179 (se->service == NULL) ? "(null)" : se->service,
2180 gai_strerror (status));
2181 return (-1);
2182 }
2183 else
2184 {
2185 c_release (LOG_NOTICE, &complaint,
2186 "network plugin: Successfully resolved \"%s\".",
2187 se->node);
2188 }
2190 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2191 {
2192 if (client->fd >= 0) /* when we reconnect */
2193 sockent_client_disconnect(se);
2195 client->fd = socket (ai_ptr->ai_family,
2196 ai_ptr->ai_socktype,
2197 ai_ptr->ai_protocol);
2198 if (client->fd < 0)
2199 {
2200 char errbuf[1024];
2201 ERROR ("network plugin: socket(2) failed: %s",
2202 sstrerror (errno, errbuf,
2203 sizeof (errbuf)));
2204 continue;
2205 }
2207 client->addr = calloc (1, sizeof (*client->addr));
2208 if (client->addr == NULL)
2209 {
2210 ERROR ("network plugin: calloc failed.");
2211 close (client->fd);
2212 client->fd = -1;
2213 continue;
2214 }
2216 assert (sizeof (*client->addr) >= ai_ptr->ai_addrlen);
2217 memcpy (client->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2218 client->addrlen = ai_ptr->ai_addrlen;
2220 network_set_ttl (se, ai_ptr);
2221 network_set_interface (se, ai_ptr);
2223 /* We don't open more than one write-socket per
2224 * node/service pair.. */
2225 break;
2226 }
2228 freeaddrinfo (ai_list);
2229 if (client->fd < 0)
2230 return (-1);
2232 if (client->resolve_interval > 0)
2233 client->next_resolve_reconnect = now + client->resolve_interval;
2234 return (0);
2235 } /* }}} int sockent_client_connect */
2237 /* Open the file descriptors for a initialized sockent structure. */
2238 static int sockent_server_listen (sockent_t *se) /* {{{ */
2239 {
2240 struct addrinfo ai_hints = { 0 };
2241 struct addrinfo *ai_list, *ai_ptr;
2242 int status;
2244 const char *node;
2245 const char *service;
2247 if (se == NULL)
2248 return (-1);
2250 assert (se->data.server.fd == NULL);
2251 assert (se->data.server.fd_num == 0);
2253 node = se->node;
2254 service = se->service;
2256 if (service == NULL)
2257 service = NET_DEFAULT_PORT;
2259 DEBUG ("network plugin: sockent_server_listen: node = %s; service = %s;",
2260 node, service);
2262 #ifdef AI_PASSIVE
2263 ai_hints.ai_flags |= AI_PASSIVE;
2264 #endif
2265 #ifdef AI_ADDRCONFIG
2266 ai_hints.ai_flags |= AI_ADDRCONFIG;
2267 #endif
2268 ai_hints.ai_family = AF_UNSPEC;
2269 ai_hints.ai_socktype = SOCK_DGRAM;
2270 ai_hints.ai_protocol = IPPROTO_UDP;
2272 status = getaddrinfo (node, service, &ai_hints, &ai_list);
2273 if (status != 0)
2274 {
2275 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
2276 (se->node == NULL) ? "(null)" : se->node,
2277 (se->service == NULL) ? "(null)" : se->service,
2278 gai_strerror (status));
2279 return (-1);
2280 }
2282 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2283 {
2284 int *tmp;
2286 tmp = realloc (se->data.server.fd,
2287 sizeof (*tmp) * (se->data.server.fd_num + 1));
2288 if (tmp == NULL)
2289 {
2290 ERROR ("network plugin: realloc failed.");
2291 continue;
2292 }
2293 se->data.server.fd = tmp;
2294 tmp = se->data.server.fd + se->data.server.fd_num;
2296 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
2297 ai_ptr->ai_protocol);
2298 if (*tmp < 0)
2299 {
2300 char errbuf[1024];
2301 ERROR ("network plugin: socket(2) failed: %s",
2302 sstrerror (errno, errbuf,
2303 sizeof (errbuf)));
2304 continue;
2305 }
2307 status = network_bind_socket (*tmp, ai_ptr, se->interface);
2308 if (status != 0)
2309 {
2310 close (*tmp);
2311 *tmp = -1;
2312 continue;
2313 }
2315 se->data.server.fd_num++;
2316 continue;
2317 } /* for (ai_list) */
2319 freeaddrinfo (ai_list);
2321 if (se->data.server.fd_num == 0)
2322 return (-1);
2323 return (0);
2324 } /* }}} int sockent_server_listen */
2326 /* Add a sockent to the global list of sockets */
2327 static int sockent_add (sockent_t *se) /* {{{ */
2328 {
2329 sockent_t *last_ptr;
2331 if (se == NULL)
2332 return (-1);
2334 if (se->type == SOCKENT_TYPE_SERVER)
2335 {
2336 struct pollfd *tmp;
2337 size_t i;
2339 tmp = realloc (listen_sockets_pollfd,
2340 sizeof (*tmp) * (listen_sockets_num
2341 + se->data.server.fd_num));
2342 if (tmp == NULL)
2343 {
2344 ERROR ("network plugin: realloc failed.");
2345 return (-1);
2346 }
2347 listen_sockets_pollfd = tmp;
2348 tmp = listen_sockets_pollfd + listen_sockets_num;
2350 for (i = 0; i < se->data.server.fd_num; i++)
2351 {
2352 memset (tmp + i, 0, sizeof (*tmp));
2353 tmp[i].fd = se->data.server.fd[i];
2354 tmp[i].events = POLLIN | POLLPRI;
2355 tmp[i].revents = 0;
2356 }
2358 listen_sockets_num += se->data.server.fd_num;
2360 if (listen_sockets == NULL)
2361 {
2362 listen_sockets = se;
2363 return (0);
2364 }
2365 last_ptr = listen_sockets;
2366 }
2367 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2368 {
2369 if (sending_sockets == NULL)
2370 {
2371 sending_sockets = se;
2372 return (0);
2373 }
2374 last_ptr = sending_sockets;
2375 }
2377 while (last_ptr->next != NULL)
2378 last_ptr = last_ptr->next;
2379 last_ptr->next = se;
2381 return (0);
2382 } /* }}} int sockent_add */
2384 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
2385 {
2386 while (42)
2387 {
2388 receive_list_entry_t *ent;
2389 sockent_t *se;
2391 /* Lock and wait for more data to come in */
2392 pthread_mutex_lock (&receive_list_lock);
2393 while ((listen_loop == 0)
2394 && (receive_list_head == NULL))
2395 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
2397 /* Remove the head entry and unlock */
2398 ent = receive_list_head;
2399 if (ent != NULL)
2400 receive_list_head = ent->next;
2401 receive_list_length--;
2402 pthread_mutex_unlock (&receive_list_lock);
2404 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2405 * because we dispatch all missing packets before shutting down. */
2406 if (ent == NULL)
2407 break;
2409 /* Look for the correct `sockent_t' */
2410 se = listen_sockets;
2411 while (se != NULL)
2412 {
2413 size_t i;
2415 for (i = 0; i < se->data.server.fd_num; i++)
2416 if (se->data.server.fd[i] == ent->fd)
2417 break;
2419 if (i < se->data.server.fd_num)
2420 break;
2422 se = se->next;
2423 }
2425 if (se == NULL)
2426 {
2427 ERROR ("network plugin: Got packet from FD %i, but can't "
2428 "find an appropriate socket entry.",
2429 ent->fd);
2430 sfree (ent->data);
2431 sfree (ent);
2432 continue;
2433 }
2435 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0,
2436 /* username = */ NULL);
2437 sfree (ent->data);
2438 sfree (ent);
2439 } /* while (42) */
2441 return (NULL);
2442 } /* }}} void *dispatch_thread */
2444 static int network_receive (void) /* {{{ */
2445 {
2446 char buffer[network_config_packet_size];
2447 int buffer_len;
2449 size_t i;
2450 int status = 0;
2452 receive_list_entry_t *private_list_head;
2453 receive_list_entry_t *private_list_tail;
2454 uint64_t private_list_length;
2456 assert (listen_sockets_num > 0);
2458 private_list_head = NULL;
2459 private_list_tail = NULL;
2460 private_list_length = 0;
2462 while (listen_loop == 0)
2463 {
2464 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2465 if (status <= 0)
2466 {
2467 char errbuf[1024];
2468 if (errno == EINTR)
2469 continue;
2470 ERROR ("network plugin: poll(2) failed: %s",
2471 sstrerror (errno, errbuf, sizeof (errbuf)));
2472 break;
2473 }
2475 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2476 {
2477 receive_list_entry_t *ent;
2479 if ((listen_sockets_pollfd[i].revents
2480 & (POLLIN | POLLPRI)) == 0)
2481 continue;
2482 status--;
2484 buffer_len = recv (listen_sockets_pollfd[i].fd,
2485 buffer, sizeof (buffer),
2486 0 /* no flags */);
2487 if (buffer_len < 0)
2488 {
2489 char errbuf[1024];
2490 status = (errno != 0) ? errno : -1;
2491 ERROR ("network plugin: recv(2) failed: %s",
2492 sstrerror (errno, errbuf, sizeof (errbuf)));
2493 break;
2494 }
2496 stats_octets_rx += ((uint64_t) buffer_len);
2497 stats_packets_rx++;
2499 /* TODO: Possible performance enhancement: Do not free
2500 * these entries in the dispatch thread but put them in
2501 * another list, so we don't have to allocate more and
2502 * more of these structures. */
2503 ent = calloc (1, sizeof (*ent));
2504 if (ent == NULL)
2505 {
2506 ERROR ("network plugin: calloc failed.");
2507 status = ENOMEM;
2508 break;
2509 }
2511 ent->data = malloc (network_config_packet_size);
2512 if (ent->data == NULL)
2513 {
2514 sfree (ent);
2515 ERROR ("network plugin: malloc failed.");
2516 status = ENOMEM;
2517 break;
2518 }
2519 ent->fd = listen_sockets_pollfd[i].fd;
2520 ent->next = NULL;
2522 memcpy (ent->data, buffer, buffer_len);
2523 ent->data_len = buffer_len;
2525 if (private_list_head == NULL)
2526 private_list_head = ent;
2527 else
2528 private_list_tail->next = ent;
2529 private_list_tail = ent;
2530 private_list_length++;
2532 /* Do not block here. Blocking here has led to
2533 * insufficient performance in the past. */
2534 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2535 {
2536 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2537 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2539 if (receive_list_head == NULL)
2540 receive_list_head = private_list_head;
2541 else
2542 receive_list_tail->next = private_list_head;
2543 receive_list_tail = private_list_tail;
2544 receive_list_length += private_list_length;
2546 pthread_cond_signal (&receive_list_cond);
2547 pthread_mutex_unlock (&receive_list_lock);
2549 private_list_head = NULL;
2550 private_list_tail = NULL;
2551 private_list_length = 0;
2552 }
2554 status = 0;
2555 } /* for (listen_sockets_pollfd) */
2557 if (status != 0)
2558 break;
2559 } /* while (listen_loop == 0) */
2561 /* Make sure everything is dispatched before exiting. */
2562 if (private_list_head != NULL)
2563 {
2564 pthread_mutex_lock (&receive_list_lock);
2566 if (receive_list_head == NULL)
2567 receive_list_head = private_list_head;
2568 else
2569 receive_list_tail->next = private_list_head;
2570 receive_list_tail = private_list_tail;
2571 receive_list_length += private_list_length;
2573 pthread_cond_signal (&receive_list_cond);
2574 pthread_mutex_unlock (&receive_list_lock);
2575 }
2577 return (status);
2578 } /* }}} int network_receive */
2580 static void *receive_thread (void __attribute__((unused)) *arg)
2581 {
2582 return (network_receive () ? (void *) 1 : (void *) 0);
2583 } /* void *receive_thread */
2585 static void network_init_buffer (void)
2586 {
2587 memset (send_buffer, 0, network_config_packet_size);
2588 send_buffer_ptr = send_buffer;
2589 send_buffer_fill = 0;
2590 send_buffer_last_update = 0;
2592 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2593 } /* int network_init_buffer */
2595 static void network_send_buffer_plain (sockent_t *se, /* {{{ */
2596 const char *buffer, size_t buffer_size)
2597 {
2598 int status;
2600 while (42)
2601 {
2602 status = sockent_client_connect (se);
2603 if (status != 0)
2604 return;
2606 status = sendto (se->data.client.fd, buffer, buffer_size,
2607 /* flags = */ 0,
2608 (struct sockaddr *) se->data.client.addr,
2609 se->data.client.addrlen);
2610 if (status < 0)
2611 {
2612 char errbuf[1024];
2614 if ((errno == EINTR) || (errno == EAGAIN))
2615 continue;
2617 ERROR ("network plugin: sendto failed: %s. Closing sending socket.",
2618 sstrerror (errno, errbuf, sizeof (errbuf)));
2619 sockent_client_disconnect (se);
2620 return;
2621 }
2623 break;
2624 } /* while (42) */
2625 } /* }}} void network_send_buffer_plain */
2627 #if HAVE_LIBGCRYPT
2628 #define BUFFER_ADD(p,s) do { \
2629 memcpy (buffer + buffer_offset, (p), (s)); \
2630 buffer_offset += (s); \
2631 } while (0)
2633 static void network_send_buffer_signed (sockent_t *se, /* {{{ */
2634 const char *in_buffer, size_t in_buffer_size)
2635 {
2636 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2637 size_t buffer_offset;
2638 size_t username_len;
2640 gcry_md_hd_t hd;
2641 gcry_error_t err;
2642 unsigned char *hash;
2644 hd = NULL;
2645 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2646 if (err != 0)
2647 {
2648 ERROR ("network plugin: Creating HMAC object failed: %s",
2649 gcry_strerror (err));
2650 return;
2651 }
2653 err = gcry_md_setkey (hd, se->data.client.password,
2654 strlen (se->data.client.password));
2655 if (err != 0)
2656 {
2657 ERROR ("network plugin: gcry_md_setkey failed: %s",
2658 gcry_strerror (err));
2659 gcry_md_close (hd);
2660 return;
2661 }
2663 username_len = strlen (se->data.client.username);
2664 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2665 {
2666 ERROR ("network plugin: Username too long: %s",
2667 se->data.client.username);
2668 return;
2669 }
2671 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2672 se->data.client.username, username_len);
2673 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2674 in_buffer, in_buffer_size);
2676 /* Initialize the `ps' structure. */
2677 part_signature_sha256_t ps = {
2678 .head.type = htons (TYPE_SIGN_SHA256),
2679 .head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len)
2680 };
2682 /* Calculate the hash value. */
2683 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2684 username_len + in_buffer_size);
2685 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2686 if (hash == NULL)
2687 {
2688 ERROR ("network plugin: gcry_md_read failed.");
2689 gcry_md_close (hd);
2690 return;
2691 }
2692 memcpy (ps.hash, hash, sizeof (ps.hash));
2694 /* Add the header */
2695 buffer_offset = 0;
2697 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2698 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2699 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2701 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2703 gcry_md_close (hd);
2704 hd = NULL;
2706 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2707 network_send_buffer_plain (se, buffer, buffer_offset);
2708 } /* }}} void network_send_buffer_signed */
2710 static void network_send_buffer_encrypted (sockent_t *se, /* {{{ */
2711 const char *in_buffer, size_t in_buffer_size)
2712 {
2713 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2714 size_t buffer_size;
2715 size_t buffer_offset;
2716 size_t header_size;
2717 size_t username_len;
2718 gcry_error_t err;
2719 gcry_cipher_hd_t cypher;
2721 /* Initialize the header fields */
2722 part_encryption_aes256_t pea = {
2723 .head.type = htons (TYPE_ENCR_AES256),
2724 .username = se->data.client.username
2725 };
2727 username_len = strlen (pea.username);
2728 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2729 {
2730 ERROR ("network plugin: Username too long: %s", pea.username);
2731 return;
2732 }
2734 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2735 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2736 - sizeof (pea.hash);
2738 assert (buffer_size <= sizeof (buffer));
2739 DEBUG ("network plugin: network_send_buffer_encrypted: "
2740 "buffer_size = %zu;", buffer_size);
2742 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2743 + username_len + in_buffer_size));
2744 pea.username_length = htons ((uint16_t) username_len);
2746 /* Chose a random initialization vector. */
2747 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2749 /* Create hash of the payload */
2750 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2752 /* Initialize the buffer */
2753 buffer_offset = 0;
2754 memset (buffer, 0, sizeof (buffer));
2757 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2758 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2759 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2760 BUFFER_ADD (pea.username, username_len);
2761 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2762 assert (buffer_offset == header_size);
2763 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2764 BUFFER_ADD (in_buffer, in_buffer_size);
2766 assert (buffer_offset == buffer_size);
2768 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2769 se->data.client.password);
2770 if (cypher == NULL)
2771 return;
2773 /* Encrypt the buffer in-place */
2774 err = gcry_cipher_encrypt (cypher,
2775 buffer + header_size,
2776 buffer_size - header_size,
2777 /* in = */ NULL, /* in len = */ 0);
2778 if (err != 0)
2779 {
2780 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2781 gcry_strerror (err));
2782 return;
2783 }
2785 /* Send it out without further modifications */
2786 network_send_buffer_plain (se, buffer, buffer_size);
2787 } /* }}} void network_send_buffer_encrypted */
2788 #undef BUFFER_ADD
2789 #endif /* HAVE_LIBGCRYPT */
2791 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2792 {
2793 sockent_t *se;
2795 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2797 for (se = sending_sockets; se != NULL; se = se->next)
2798 {
2799 #if HAVE_LIBGCRYPT
2800 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2801 network_send_buffer_encrypted (se, buffer, buffer_len);
2802 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2803 network_send_buffer_signed (se, buffer, buffer_len);
2804 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2805 #endif /* HAVE_LIBGCRYPT */
2806 network_send_buffer_plain (se, buffer, buffer_len);
2807 } /* for (sending_sockets) */
2808 } /* }}} void network_send_buffer */
2810 static int add_to_buffer (char *buffer, size_t buffer_size, /* {{{ */
2811 value_list_t *vl_def,
2812 const data_set_t *ds, const value_list_t *vl)
2813 {
2814 char *buffer_orig = buffer;
2816 if (strcmp (vl_def->host, vl->host) != 0)
2817 {
2818 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2819 vl->host, strlen (vl->host)) != 0)
2820 return (-1);
2821 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2822 }
2824 if (vl_def->time != vl->time)
2825 {
2826 if (write_part_number (&buffer, &buffer_size, TYPE_TIME_HR,
2827 (uint64_t) vl->time))
2828 return (-1);
2829 vl_def->time = vl->time;
2830 }
2832 if (vl_def->interval != vl->interval)
2833 {
2834 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL_HR,
2835 (uint64_t) vl->interval))
2836 return (-1);
2837 vl_def->interval = vl->interval;
2838 }
2840 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2841 {
2842 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2843 vl->plugin, strlen (vl->plugin)) != 0)
2844 return (-1);
2845 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2846 }
2848 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2849 {
2850 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2851 vl->plugin_instance,
2852 strlen (vl->plugin_instance)) != 0)
2853 return (-1);
2854 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2855 }
2857 if (strcmp (vl_def->type, vl->type) != 0)
2858 {
2859 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2860 vl->type, strlen (vl->type)) != 0)
2861 return (-1);
2862 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2863 }
2865 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2866 {
2867 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2868 vl->type_instance,
2869 strlen (vl->type_instance)) != 0)
2870 return (-1);
2871 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2872 }
2874 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2875 return (-1);
2877 return (buffer - buffer_orig);
2878 } /* }}} int add_to_buffer */
2880 static void flush_buffer (void)
2881 {
2882 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2883 send_buffer_fill);
2885 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2887 stats_octets_tx += ((uint64_t) send_buffer_fill);
2888 stats_packets_tx++;
2890 network_init_buffer ();
2891 }
2893 static int network_write (const data_set_t *ds, const value_list_t *vl,
2894 user_data_t __attribute__((unused)) *user_data)
2895 {
2896 int status;
2898 if (!check_send_okay (vl))
2899 {
2900 #if COLLECT_DEBUG
2901 char name[6*DATA_MAX_NAME_LEN];
2902 FORMAT_VL (name, sizeof (name), vl);
2903 name[sizeof (name) - 1] = 0;
2904 DEBUG ("network plugin: network_write: "
2905 "NOT sending %s.", name);
2906 #endif
2907 /* Counter is not protected by another lock and may be reached by
2908 * multiple threads */
2909 pthread_mutex_lock (&stats_lock);
2910 stats_values_not_sent++;
2911 pthread_mutex_unlock (&stats_lock);
2912 return (0);
2913 }
2915 uc_meta_data_add_unsigned_int (vl,
2916 "network:time_sent", (uint64_t) vl->time);
2918 pthread_mutex_lock (&send_buffer_lock);
2920 status = add_to_buffer (send_buffer_ptr,
2921 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2922 &send_buffer_vl,
2923 ds, vl);
2924 if (status >= 0)
2925 {
2926 /* status == bytes added to the buffer */
2927 send_buffer_fill += status;
2928 send_buffer_ptr += status;
2929 send_buffer_last_update = cdtime();
2931 stats_values_sent++;
2932 }
2933 else
2934 {
2935 flush_buffer ();
2937 status = add_to_buffer (send_buffer_ptr,
2938 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2939 &send_buffer_vl,
2940 ds, vl);
2942 if (status >= 0)
2943 {
2944 send_buffer_fill += status;
2945 send_buffer_ptr += status;
2947 stats_values_sent++;
2948 }
2949 }
2951 if (status < 0)
2952 {
2953 ERROR ("network plugin: Unable to append to the "
2954 "buffer for some weird reason");
2955 }
2956 else if ((network_config_packet_size - send_buffer_fill) < 15)
2957 {
2958 flush_buffer ();
2959 }
2961 pthread_mutex_unlock (&send_buffer_lock);
2963 return ((status < 0) ? -1 : 0);
2964 } /* int network_write */
2966 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2967 {
2968 int tmp = 0;
2970 if (cf_util_get_int (ci, &tmp) != 0)
2971 return (-1);
2972 else if ((tmp > 0) && (tmp <= 255))
2973 network_config_ttl = tmp;
2974 else {
2975 WARNING ("network plugin: The `TimeToLive' must be between 1 and 255.");
2976 return (-1);
2977 }
2979 return (0);
2980 } /* }}} int network_config_set_ttl */
2982 static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
2983 int *interface)
2984 {
2985 char if_name[256];
2987 if (cf_util_get_string_buffer (ci, if_name, sizeof (if_name)) != 0)
2988 return (-1);
2990 *interface = if_nametoindex (if_name);
2991 return (0);
2992 } /* }}} int network_config_set_interface */
2994 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
2995 {
2996 int tmp = 0;
2998 if (cf_util_get_int (ci, &tmp) != 0)
2999 return (-1);
3000 else if ((tmp >= 1024) && (tmp <= 65535))
3001 network_config_packet_size = tmp;
3002 else {
3003 WARNING ("network plugin: The `MaxPacketSize' must be between 1024 and 65535.");
3004 return (-1);
3005 }
3007 return (0);
3008 } /* }}} int network_config_set_buffer_size */
3010 #if HAVE_LIBGCRYPT
3011 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
3012 int *retval)
3013 {
3014 char *str;
3015 if ((ci->values_num != 1)
3016 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3017 {
3018 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
3019 "one string argument.");
3020 return (-1);
3021 }
3023 str = ci->values[0].value.string;
3024 if (strcasecmp ("Encrypt", str) == 0)
3025 *retval = SECURITY_LEVEL_ENCRYPT;
3026 else if (strcasecmp ("Sign", str) == 0)
3027 *retval = SECURITY_LEVEL_SIGN;
3028 else if (strcasecmp ("None", str) == 0)
3029 *retval = SECURITY_LEVEL_NONE;
3030 else
3031 {
3032 WARNING ("network plugin: Unknown security level: %s.", str);
3033 return (-1);
3034 }
3036 return (0);
3037 } /* }}} int network_config_set_security_level */
3038 #endif /* HAVE_LIBGCRYPT */
3040 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
3041 {
3042 sockent_t *se;
3043 int status;
3044 int i;
3046 if ((ci->values_num < 1) || (ci->values_num > 2)
3047 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3048 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3049 {
3050 ERROR ("network plugin: The `%s' config option needs "
3051 "one or two string arguments.", ci->key);
3052 return (-1);
3053 }
3055 se = sockent_create (SOCKENT_TYPE_SERVER);
3056 if (se == NULL)
3057 {
3058 ERROR ("network plugin: sockent_create failed.");
3059 return (-1);
3060 }
3062 se->node = strdup (ci->values[0].value.string);
3063 if (ci->values_num >= 2)
3064 se->service = strdup (ci->values[1].value.string);
3066 for (i = 0; i < ci->children_num; i++)
3067 {
3068 oconfig_item_t *child = ci->children + i;
3070 #if HAVE_LIBGCRYPT
3071 if (strcasecmp ("AuthFile", child->key) == 0)
3072 cf_util_get_string (child, &se->data.server.auth_file);
3073 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3074 network_config_set_security_level (child,
3075 &se->data.server.security_level);
3076 else
3077 #endif /* HAVE_LIBGCRYPT */
3078 if (strcasecmp ("Interface", child->key) == 0)
3079 network_config_set_interface (child, &se->interface);
3080 else
3081 {
3082 WARNING ("network plugin: Option `%s' is not allowed here.",
3083 child->key);
3084 }
3085 }
3087 #if HAVE_LIBGCRYPT
3088 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
3089 && (se->data.server.auth_file == NULL))
3090 {
3091 ERROR ("network plugin: A security level higher than `none' was "
3092 "requested, but no AuthFile option was given. Cowardly refusing to "
3093 "open this socket!");
3094 sockent_destroy (se);
3095 return (-1);
3096 }
3097 #endif /* HAVE_LIBGCRYPT */
3099 status = sockent_init_crypto (se);
3100 if (status != 0)
3101 {
3102 ERROR ("network plugin: network_config_add_listen: sockent_init_crypto() failed.");
3103 sockent_destroy (se);
3104 return (-1);
3105 }
3107 status = sockent_server_listen (se);
3108 if (status != 0)
3109 {
3110 ERROR ("network plugin: network_config_add_listen: sockent_server_listen failed.");
3111 sockent_destroy (se);
3112 return (-1);
3113 }
3115 status = sockent_add (se);
3116 if (status != 0)
3117 {
3118 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
3119 sockent_destroy (se);
3120 return (-1);
3121 }
3123 return (0);
3124 } /* }}} int network_config_add_listen */
3126 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
3127 {
3128 sockent_t *se;
3129 int status;
3130 int i;
3132 if ((ci->values_num < 1) || (ci->values_num > 2)
3133 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3134 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3135 {
3136 ERROR ("network plugin: The `%s' config option needs "
3137 "one or two string arguments.", ci->key);
3138 return (-1);
3139 }
3141 se = sockent_create (SOCKENT_TYPE_CLIENT);
3142 if (se == NULL)
3143 {
3144 ERROR ("network plugin: sockent_create failed.");
3145 return (-1);
3146 }
3148 se->node = strdup (ci->values[0].value.string);
3149 if (ci->values_num >= 2)
3150 se->service = strdup (ci->values[1].value.string);
3152 for (i = 0; i < ci->children_num; i++)
3153 {
3154 oconfig_item_t *child = ci->children + i;
3156 #if HAVE_LIBGCRYPT
3157 if (strcasecmp ("Username", child->key) == 0)
3158 cf_util_get_string (child, &se->data.client.username);
3159 else if (strcasecmp ("Password", child->key) == 0)
3160 cf_util_get_string (child, &se->data.client.password);
3161 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3162 network_config_set_security_level (child,
3163 &se->data.client.security_level);
3164 else
3165 #endif /* HAVE_LIBGCRYPT */
3166 if (strcasecmp ("Interface", child->key) == 0)
3167 network_config_set_interface (child, &se->interface);
3168 else if (strcasecmp ("ResolveInterval", child->key) == 0)
3169 cf_util_get_cdtime(child, &se->data.client.resolve_interval);
3170 else
3171 {
3172 WARNING ("network plugin: Option `%s' is not allowed here.",
3173 child->key);
3174 }
3175 }
3177 #if HAVE_LIBGCRYPT
3178 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
3179 && ((se->data.client.username == NULL)
3180 || (se->data.client.password == NULL)))
3181 {
3182 ERROR ("network plugin: A security level higher than `none' was "
3183 "requested, but no Username or Password option was given. "
3184 "Cowardly refusing to open this socket!");
3185 sockent_destroy (se);
3186 return (-1);
3187 }
3188 #endif /* HAVE_LIBGCRYPT */
3190 status = sockent_init_crypto (se);
3191 if (status != 0)
3192 {
3193 ERROR ("network plugin: network_config_add_server: sockent_init_crypto() failed.");
3194 sockent_destroy (se);
3195 return (-1);
3196 }
3198 /* No call to sockent_client_connect() here -- it is called from
3199 * network_send_buffer_plain(). */
3201 status = sockent_add (se);
3202 if (status != 0)
3203 {
3204 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
3205 sockent_destroy (se);
3206 return (-1);
3207 }
3209 return (0);
3210 } /* }}} int network_config_add_server */
3212 static int network_config (oconfig_item_t *ci) /* {{{ */
3213 {
3214 int i;
3216 /* The options need to be applied first */
3217 for (i = 0; i < ci->children_num; i++)
3218 {
3219 oconfig_item_t *child = ci->children + i;
3220 if (strcasecmp ("TimeToLive", child->key) == 0)
3221 network_config_set_ttl (child);
3222 }
3224 for (i = 0; i < ci->children_num; i++)
3225 {
3226 oconfig_item_t *child = ci->children + i;
3228 if (strcasecmp ("Listen", child->key) == 0)
3229 network_config_add_listen (child);
3230 else if (strcasecmp ("Server", child->key) == 0)
3231 network_config_add_server (child);
3232 else if (strcasecmp ("TimeToLive", child->key) == 0) {
3233 /* Handled earlier */
3234 }
3235 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
3236 network_config_set_buffer_size (child);
3237 else if (strcasecmp ("Forward", child->key) == 0)
3238 cf_util_get_boolean (child, &network_config_forward);
3239 else if (strcasecmp ("ReportStats", child->key) == 0)
3240 cf_util_get_boolean (child, &network_config_stats);
3241 else
3242 {
3243 WARNING ("network plugin: Option `%s' is not allowed here.",
3244 child->key);
3245 }
3246 }
3248 return (0);
3249 } /* }}} int network_config */
3251 static int network_notification (const notification_t *n,
3252 user_data_t __attribute__((unused)) *user_data)
3253 {
3254 char buffer[network_config_packet_size];
3255 char *buffer_ptr = buffer;
3256 size_t buffer_free = sizeof (buffer);
3257 int status;
3259 if (!check_send_notify_okay (n))
3260 return (0);
3262 memset (buffer, 0, sizeof (buffer));
3264 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME_HR,
3265 (uint64_t) n->time);
3266 if (status != 0)
3267 return (-1);
3269 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
3270 (uint64_t) n->severity);
3271 if (status != 0)
3272 return (-1);
3274 if (strlen (n->host) > 0)
3275 {
3276 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
3277 n->host, strlen (n->host));
3278 if (status != 0)
3279 return (-1);
3280 }
3282 if (strlen (n->plugin) > 0)
3283 {
3284 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
3285 n->plugin, strlen (n->plugin));
3286 if (status != 0)
3287 return (-1);
3288 }
3290 if (strlen (n->plugin_instance) > 0)
3291 {
3292 status = write_part_string (&buffer_ptr, &buffer_free,
3293 TYPE_PLUGIN_INSTANCE,
3294 n->plugin_instance, strlen (n->plugin_instance));
3295 if (status != 0)
3296 return (-1);
3297 }
3299 if (strlen (n->type) > 0)
3300 {
3301 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3302 n->type, strlen (n->type));
3303 if (status != 0)
3304 return (-1);
3305 }
3307 if (strlen (n->type_instance) > 0)
3308 {
3309 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3310 n->type_instance, strlen (n->type_instance));
3311 if (status != 0)
3312 return (-1);
3313 }
3315 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3316 n->message, strlen (n->message));
3317 if (status != 0)
3318 return (-1);
3320 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3322 return (0);
3323 } /* int network_notification */
3325 static int network_shutdown (void)
3326 {
3327 sockent_t *se;
3329 listen_loop++;
3331 /* Kill the listening thread */
3332 if (receive_thread_running != 0)
3333 {
3334 INFO ("network plugin: Stopping receive thread.");
3335 pthread_kill (receive_thread_id, SIGTERM);
3336 pthread_join (receive_thread_id, NULL /* no return value */);
3337 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3338 receive_thread_running = 0;
3339 }
3341 /* Shutdown the dispatching thread */
3342 if (dispatch_thread_running != 0)
3343 {
3344 INFO ("network plugin: Stopping dispatch thread.");
3345 pthread_mutex_lock (&receive_list_lock);
3346 pthread_cond_broadcast (&receive_list_cond);
3347 pthread_mutex_unlock (&receive_list_lock);
3348 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3349 dispatch_thread_running = 0;
3350 }
3352 sockent_destroy (listen_sockets);
3354 if (send_buffer_fill > 0)
3355 flush_buffer ();
3357 sfree (send_buffer);
3359 for (se = sending_sockets; se != NULL; se = se->next)
3360 sockent_client_disconnect (se);
3361 sockent_destroy (sending_sockets);
3363 plugin_unregister_config ("network");
3364 plugin_unregister_init ("network");
3365 plugin_unregister_write ("network");
3366 plugin_unregister_shutdown ("network");
3368 return (0);
3369 } /* int network_shutdown */
3371 static int network_stats_read (void) /* {{{ */
3372 {
3373 derive_t copy_octets_rx;
3374 derive_t copy_octets_tx;
3375 derive_t copy_packets_rx;
3376 derive_t copy_packets_tx;
3377 derive_t copy_values_dispatched;
3378 derive_t copy_values_not_dispatched;
3379 derive_t copy_values_sent;
3380 derive_t copy_values_not_sent;
3381 derive_t copy_receive_list_length;
3382 value_list_t vl = VALUE_LIST_INIT;
3383 value_t values[2];
3385 copy_octets_rx = stats_octets_rx;
3386 copy_octets_tx = stats_octets_tx;
3387 copy_packets_rx = stats_packets_rx;
3388 copy_packets_tx = stats_packets_tx;
3389 copy_values_dispatched = stats_values_dispatched;
3390 copy_values_not_dispatched = stats_values_not_dispatched;
3391 copy_values_sent = stats_values_sent;
3392 copy_values_not_sent = stats_values_not_sent;
3393 copy_receive_list_length = receive_list_length;
3395 /* Initialize `vl' */
3396 vl.values = values;
3397 vl.values_len = 2;
3398 vl.time = 0;
3399 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3400 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3402 /* Octets received / sent */
3403 vl.values[0].derive = (derive_t) copy_octets_rx;
3404 vl.values[1].derive = (derive_t) copy_octets_tx;
3405 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3406 plugin_dispatch_values (&vl);
3408 /* Packets received / send */
3409 vl.values[0].derive = (derive_t) copy_packets_rx;
3410 vl.values[1].derive = (derive_t) copy_packets_tx;
3411 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3412 plugin_dispatch_values (&vl);
3414 /* Values (not) dispatched and (not) send */
3415 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3416 vl.values_len = 1;
3418 vl.values[0].derive = (derive_t) copy_values_dispatched;
3419 sstrncpy (vl.type_instance, "dispatch-accepted",
3420 sizeof (vl.type_instance));
3421 plugin_dispatch_values (&vl);
3423 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3424 sstrncpy (vl.type_instance, "dispatch-rejected",
3425 sizeof (vl.type_instance));
3426 plugin_dispatch_values (&vl);
3428 vl.values[0].derive = (derive_t) copy_values_sent;
3429 sstrncpy (vl.type_instance, "send-accepted",
3430 sizeof (vl.type_instance));
3431 plugin_dispatch_values (&vl);
3433 vl.values[0].derive = (derive_t) copy_values_not_sent;
3434 sstrncpy (vl.type_instance, "send-rejected",
3435 sizeof (vl.type_instance));
3436 plugin_dispatch_values (&vl);
3438 /* Receive queue length */
3439 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3440 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3441 vl.type_instance[0] = 0;
3442 plugin_dispatch_values (&vl);
3444 return (0);
3445 } /* }}} int network_stats_read */
3447 static int network_init (void)
3448 {
3449 static _Bool have_init = 0;
3451 /* Check if we were already initialized. If so, just return - there's
3452 * nothing more to do (for now, that is). */
3453 if (have_init)
3454 return (0);
3455 have_init = 1;
3457 #if HAVE_LIBGCRYPT
3458 network_init_gcrypt ();
3459 #endif
3461 if (network_config_stats)
3462 plugin_register_read ("network", network_stats_read);
3464 plugin_register_shutdown ("network", network_shutdown);
3466 send_buffer = malloc (network_config_packet_size);
3467 if (send_buffer == NULL)
3468 {
3469 ERROR ("network plugin: malloc failed.");
3470 return (-1);
3471 }
3472 network_init_buffer ();
3474 /* setup socket(s) and so on */
3475 if (sending_sockets != NULL)
3476 {
3477 plugin_register_write ("network", network_write,
3478 /* user_data = */ NULL);
3479 plugin_register_notification ("network", network_notification,
3480 /* user_data = */ NULL);
3481 }
3483 /* If no threads need to be started, return here. */
3484 if ((listen_sockets_num == 0)
3485 || ((dispatch_thread_running != 0)
3486 && (receive_thread_running != 0)))
3487 return (0);
3489 if (dispatch_thread_running == 0)
3490 {
3491 int status;
3492 status = plugin_thread_create (&dispatch_thread_id,
3493 NULL /* no attributes */,
3494 dispatch_thread,
3495 NULL /* no argument */);
3496 if (status != 0)
3497 {
3498 char errbuf[1024];
3499 ERROR ("network: pthread_create failed: %s",
3500 sstrerror (errno, errbuf,
3501 sizeof (errbuf)));
3502 }
3503 else
3504 {
3505 dispatch_thread_running = 1;
3506 }
3507 }
3509 if (receive_thread_running == 0)
3510 {
3511 int status;
3512 status = plugin_thread_create (&receive_thread_id,
3513 NULL /* no attributes */,
3514 receive_thread,
3515 NULL /* no argument */);
3516 if (status != 0)
3517 {
3518 char errbuf[1024];
3519 ERROR ("network: pthread_create failed: %s",
3520 sstrerror (errno, errbuf,
3521 sizeof (errbuf)));
3522 }
3523 else
3524 {
3525 receive_thread_running = 1;
3526 }
3527 }
3529 return (0);
3530 } /* int network_init */
3532 /*
3533 * The flush option of the network plugin cannot flush individual identifiers.
3534 * All the values are added to a buffer and sent when the buffer is full, the
3535 * requested value may or may not be in there, it's not worth finding out. We
3536 * just send the buffer if `flush' is called - if the requested value was in
3537 * there, good. If not, well, then there is nothing to flush.. -octo
3538 */
3539 static int network_flush (cdtime_t timeout,
3540 __attribute__((unused)) const char *identifier,
3541 __attribute__((unused)) user_data_t *user_data)
3542 {
3543 pthread_mutex_lock (&send_buffer_lock);
3545 if (send_buffer_fill > 0)
3546 {
3547 if (timeout > 0)
3548 {
3549 cdtime_t now = cdtime ();
3550 if ((send_buffer_last_update + timeout) > now)
3551 {
3552 pthread_mutex_unlock (&send_buffer_lock);
3553 return (0);
3554 }
3555 }
3556 flush_buffer ();
3557 }
3558 pthread_mutex_unlock (&send_buffer_lock);
3560 return (0);
3561 } /* int network_flush */
3563 void module_register (void)
3564 {
3565 plugin_register_complex_config ("network", network_config);
3566 plugin_register_init ("network", network_init);
3567 plugin_register_flush ("network", network_flush,
3568 /* user_data = */ NULL);
3569 } /* void module_register */
3571 /* vim: set fdm=marker : */