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"
29 #include "plugin.h"
30 #include "common.h"
31 #include "configfile.h"
32 #include "utils_fbhash.h"
33 #include "utils_cache.h"
34 #include "utils_complain.h"
36 #include "network.h"
38 #if HAVE_NETDB_H
39 # include <netdb.h>
40 #endif
41 #if HAVE_NETINET_IN_H
42 # include <netinet/in.h>
43 #endif
44 #if HAVE_ARPA_INET_H
45 # include <arpa/inet.h>
46 #endif
47 #if HAVE_POLL_H
48 # include <poll.h>
49 #endif
50 #if HAVE_NET_IF_H
51 # include <net/if.h>
52 #endif
54 #if HAVE_LIBGCRYPT
55 # if defined __APPLE__
56 /* default xcode compiler throws warnings even when deprecated functionality
57 * is not used. -Werror breaks the build because of erroneous warnings.
58 * http://stackoverflow.com/questions/10556299/compiler-warnings-with-libgcrypt-v1-5-0/12830209#12830209
59 */
60 # pragma GCC diagnostic ignored "-Wdeprecated-declarations"
61 # endif
62 /* FreeBSD's copy of libgcrypt extends the existing GCRYPT_NO_DEPRECATED
63 * to properly hide all deprecated functionality.
64 * http://svnweb.freebsd.org/ports/head/security/libgcrypt/files/patch-src__gcrypt.h.in
65 */
66 # define GCRYPT_NO_DEPRECATED
67 # include <gcrypt.h>
68 # if defined __APPLE__
69 /* Re enable deprecation warnings */
70 # pragma GCC diagnostic warning "-Wdeprecated-declarations"
71 # endif
72 # if GCRYPT_VERSION_NUMBER < 0x010600
73 GCRY_THREAD_OPTION_PTHREAD_IMPL;
74 # endif
75 #endif
77 #ifndef IPV6_ADD_MEMBERSHIP
78 # ifdef IPV6_JOIN_GROUP
79 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
80 # else
81 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
82 # endif
83 #endif /* !IP_ADD_MEMBERSHIP */
85 /*
86 * Maximum size required for encryption / signing:
87 *
88 * 42 bytes for the encryption header
89 * + 64 bytes for the username
90 * -----------
91 * = 106 bytes
92 */
93 #define BUFF_SIG_SIZE 106
95 /*
96 * Private data types
97 */
98 #define SECURITY_LEVEL_NONE 0
99 #if HAVE_LIBGCRYPT
100 # define SECURITY_LEVEL_SIGN 1
101 # define SECURITY_LEVEL_ENCRYPT 2
102 #endif
103 struct sockent_client
104 {
105 int fd;
106 struct sockaddr_storage *addr;
107 socklen_t addrlen;
108 #if HAVE_LIBGCRYPT
109 int security_level;
110 char *username;
111 char *password;
112 gcry_cipher_hd_t cypher;
113 unsigned char password_hash[32];
114 #endif
115 cdtime_t next_resolve_reconnect;
116 cdtime_t resolve_interval;
117 };
119 struct sockent_server
120 {
121 int *fd;
122 size_t fd_num;
123 #if HAVE_LIBGCRYPT
124 int security_level;
125 char *auth_file;
126 fbhash_t *userdb;
127 gcry_cipher_hd_t cypher;
128 #endif
129 };
131 typedef struct sockent
132 {
133 #define SOCKENT_TYPE_CLIENT 1
134 #define SOCKENT_TYPE_SERVER 2
135 int type;
137 char *node;
138 char *service;
139 int interface;
141 union
142 {
143 struct sockent_client client;
144 struct sockent_server server;
145 } data;
147 struct sockent *next;
148 } sockent_t;
150 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
151 * 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
152 * +-------+-----------------------+-------------------------------+
153 * ! Ver. ! ! Length !
154 * +-------+-----------------------+-------------------------------+
155 */
156 struct part_header_s
157 {
158 uint16_t type;
159 uint16_t length;
160 };
161 typedef struct part_header_s part_header_t;
163 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
164 * 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
165 * +-------------------------------+-------------------------------+
166 * ! Type ! Length !
167 * +-------------------------------+-------------------------------+
168 * : (Length - 4) Bytes :
169 * +---------------------------------------------------------------+
170 */
171 struct part_string_s
172 {
173 part_header_t *head;
174 char *value;
175 };
176 typedef struct part_string_s part_string_t;
178 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
179 * 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
180 * +-------------------------------+-------------------------------+
181 * ! Type ! Length !
182 * +-------------------------------+-------------------------------+
183 * : (Length - 4 == 2 || 4 || 8) Bytes :
184 * +---------------------------------------------------------------+
185 */
186 struct part_number_s
187 {
188 part_header_t *head;
189 uint64_t *value;
190 };
191 typedef struct part_number_s part_number_t;
193 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
194 * 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
195 * +-------------------------------+-------------------------------+
196 * ! Type ! Length !
197 * +-------------------------------+---------------+---------------+
198 * ! Num of values ! Type0 ! Type1 !
199 * +-------------------------------+---------------+---------------+
200 * ! Value0 !
201 * ! !
202 * +---------------------------------------------------------------+
203 * ! Value1 !
204 * ! !
205 * +---------------------------------------------------------------+
206 */
207 struct part_values_s
208 {
209 part_header_t *head;
210 uint16_t *num_values;
211 uint8_t *values_types;
212 value_t *values;
213 };
214 typedef struct part_values_s part_values_t;
216 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
217 * 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
218 * +-------------------------------+-------------------------------+
219 * ! Type ! Length !
220 * +-------------------------------+-------------------------------+
221 * ! Hash (Bits 0 - 31) !
222 * : : :
223 * ! Hash (Bits 224 - 255) !
224 * +---------------------------------------------------------------+
225 */
226 /* Minimum size */
227 #define PART_SIGNATURE_SHA256_SIZE 36
228 struct part_signature_sha256_s
229 {
230 part_header_t head;
231 unsigned char hash[32];
232 char *username;
233 };
234 typedef struct part_signature_sha256_s part_signature_sha256_t;
236 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
237 * 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
238 * +-------------------------------+-------------------------------+
239 * ! Type ! Length !
240 * +-------------------------------+-------------------------------+
241 * ! Original length ! Padding (0 - 15 bytes) !
242 * +-------------------------------+-------------------------------+
243 * ! Hash (Bits 0 - 31) !
244 * : : :
245 * ! Hash (Bits 128 - 159) !
246 * +---------------------------------------------------------------+
247 */
248 /* Minimum size */
249 #define PART_ENCRYPTION_AES256_SIZE 42
250 struct part_encryption_aes256_s
251 {
252 part_header_t head;
253 uint16_t username_length;
254 char *username;
255 unsigned char iv[16];
256 /* <encrypted> */
257 unsigned char hash[20];
258 /* <payload /> */
259 /* </encrypted> */
260 };
261 typedef struct part_encryption_aes256_s part_encryption_aes256_t;
263 struct receive_list_entry_s
264 {
265 char *data;
266 int data_len;
267 int fd;
268 struct receive_list_entry_s *next;
269 };
270 typedef struct receive_list_entry_s receive_list_entry_t;
272 /*
273 * Private variables
274 */
275 static int network_config_ttl = 0;
276 /* Ethernet - (IPv6 + UDP) = 1500 - (40 + 8) = 1452 */
277 static size_t network_config_packet_size = 1452;
278 static _Bool network_config_forward = 0;
279 static _Bool network_config_stats = 0;
281 static sockent_t *sending_sockets = NULL;
283 static receive_list_entry_t *receive_list_head = NULL;
284 static receive_list_entry_t *receive_list_tail = NULL;
285 static pthread_mutex_t receive_list_lock = PTHREAD_MUTEX_INITIALIZER;
286 static pthread_cond_t receive_list_cond = PTHREAD_COND_INITIALIZER;
287 static uint64_t receive_list_length = 0;
289 static sockent_t *listen_sockets = NULL;
290 static struct pollfd *listen_sockets_pollfd = NULL;
291 static size_t listen_sockets_num = 0;
293 /* The receive and dispatch threads will run as long as `listen_loop' is set to
294 * zero. */
295 static int listen_loop = 0;
296 static int receive_thread_running = 0;
297 static pthread_t receive_thread_id;
298 static int dispatch_thread_running = 0;
299 static pthread_t dispatch_thread_id;
301 /* Buffer in which to-be-sent network packets are constructed. */
302 static char *send_buffer;
303 static char *send_buffer_ptr;
304 static int send_buffer_fill;
305 static cdtime_t send_buffer_last_update;
306 static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
307 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
309 /* XXX: These counters are incremented from one place only. The spot in which
310 * the values are incremented is either only reachable by one thread (the
311 * dispatch thread, for example) or locked by some lock (send_buffer_lock for
312 * example). Only if neither is true, the stats_lock is acquired. The counters
313 * are always read without holding a lock in the hope that writing 8 bytes to
314 * memory is an atomic operation. */
315 static derive_t stats_octets_rx = 0;
316 static derive_t stats_octets_tx = 0;
317 static derive_t stats_packets_rx = 0;
318 static derive_t stats_packets_tx = 0;
319 static derive_t stats_values_dispatched = 0;
320 static derive_t stats_values_not_dispatched = 0;
321 static derive_t stats_values_sent = 0;
322 static derive_t stats_values_not_sent = 0;
323 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
325 /*
326 * Private functions
327 */
328 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
329 {
330 uint64_t time_sent = 0;
331 int status;
333 status = uc_meta_data_get_unsigned_int (vl,
334 "network:time_sent", &time_sent);
336 /* This is a value we already sent. Don't allow it to be received again in
337 * order to avoid looping. */
338 if ((status == 0) && (time_sent >= ((uint64_t) vl->time)))
339 return (0);
341 return (1);
342 } /* }}} _Bool check_receive_okay */
344 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
345 {
346 _Bool received = 0;
347 int status;
349 if (network_config_forward)
350 return (1);
352 if (vl->meta == NULL)
353 return (1);
355 status = meta_data_get_boolean (vl->meta, "network:received", &received);
356 if (status == -ENOENT)
357 return (1);
358 else if (status != 0)
359 {
360 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
361 "with status %i.", status);
362 return (1);
363 }
365 /* By default, only *send* value lists that were not *received* by the
366 * network plugin. */
367 return (!received);
368 } /* }}} _Bool check_send_okay */
370 static _Bool check_notify_received (const notification_t *n) /* {{{ */
371 {
372 notification_meta_t *ptr;
374 for (ptr = n->meta; ptr != NULL; ptr = ptr->next)
375 if ((strcmp ("network:received", ptr->name) == 0)
376 && (ptr->type == NM_TYPE_BOOLEAN))
377 return ((_Bool) ptr->nm_value.nm_boolean);
379 return (0);
380 } /* }}} _Bool check_notify_received */
382 static _Bool check_send_notify_okay (const notification_t *n) /* {{{ */
383 {
384 static c_complain_t complain_forwarding = C_COMPLAIN_INIT_STATIC;
385 _Bool received = 0;
387 if (n->meta == NULL)
388 return (1);
390 received = check_notify_received (n);
392 if (network_config_forward && received)
393 {
394 c_complain_once (LOG_ERR, &complain_forwarding,
395 "network plugin: A notification has been received via the network "
396 "and forwarding is enabled. Forwarding of notifications is currently "
397 "not supported, because there is not loop-deteciton available. "
398 "Please contact the collectd mailing list if you need this "
399 "feature.");
400 }
402 /* By default, only *send* value lists that were not *received* by the
403 * network plugin. */
404 return (!received);
405 } /* }}} _Bool check_send_notify_okay */
407 static int network_dispatch_values (value_list_t *vl, /* {{{ */
408 const char *username)
409 {
410 int status;
412 if ((vl->time == 0)
413 || (strlen (vl->host) == 0)
414 || (strlen (vl->plugin) == 0)
415 || (strlen (vl->type) == 0))
416 return (-EINVAL);
418 if (!check_receive_okay (vl))
419 {
420 #if COLLECT_DEBUG
421 char name[6*DATA_MAX_NAME_LEN];
422 FORMAT_VL (name, sizeof (name), vl);
423 name[sizeof (name) - 1] = 0;
424 DEBUG ("network plugin: network_dispatch_values: "
425 "NOT dispatching %s.", name);
426 #endif
427 stats_values_not_dispatched++;
428 return (0);
429 }
431 assert (vl->meta == NULL);
433 vl->meta = meta_data_create ();
434 if (vl->meta == NULL)
435 {
436 ERROR ("network plugin: meta_data_create failed.");
437 return (-ENOMEM);
438 }
440 status = meta_data_add_boolean (vl->meta, "network:received", 1);
441 if (status != 0)
442 {
443 ERROR ("network plugin: meta_data_add_boolean failed.");
444 meta_data_destroy (vl->meta);
445 vl->meta = NULL;
446 return (status);
447 }
449 if (username != NULL)
450 {
451 status = meta_data_add_string (vl->meta, "network:username", username);
452 if (status != 0)
453 {
454 ERROR ("network plugin: meta_data_add_string failed.");
455 meta_data_destroy (vl->meta);
456 vl->meta = NULL;
457 return (status);
458 }
459 }
461 plugin_dispatch_values (vl);
462 stats_values_dispatched++;
464 meta_data_destroy (vl->meta);
465 vl->meta = NULL;
467 return (0);
468 } /* }}} int network_dispatch_values */
470 static int network_dispatch_notification (notification_t *n) /* {{{ */
471 {
472 int status;
474 assert (n->meta == NULL);
476 status = plugin_notification_meta_add_boolean (n, "network:received", 1);
477 if (status != 0)
478 {
479 ERROR ("network plugin: plugin_notification_meta_add_boolean failed.");
480 plugin_notification_meta_free (n->meta);
481 n->meta = NULL;
482 return (status);
483 }
485 status = plugin_dispatch_notification (n);
487 plugin_notification_meta_free (n->meta);
488 n->meta = NULL;
490 return (status);
491 } /* }}} int network_dispatch_notification */
493 #if HAVE_LIBGCRYPT
494 static void network_init_gcrypt (void) /* {{{ */
495 {
496 /* http://lists.gnupg.org/pipermail/gcrypt-devel/2003-August/000458.html
497 * Because you can't know in a library whether another library has
498 * already initialized the library */
499 if (gcry_control (GCRYCTL_ANY_INITIALIZATION_P))
500 return;
502 /* http://www.gnupg.org/documentation/manuals/gcrypt/Multi_002dThreading.html
503 * To ensure thread-safety, it's important to set GCRYCTL_SET_THREAD_CBS
504 * *before* initalizing Libgcrypt with gcry_check_version(), which itself must
505 * be called before any other gcry_* function. GCRYCTL_ANY_INITIALIZATION_P
506 * above doesn't count, as it doesn't implicitly initalize Libgcrypt.
507 *
508 * tl;dr: keep all these gry_* statements in this exact order please. */
509 # if GCRYPT_VERSION_NUMBER < 0x010600
510 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
511 # endif
512 gcry_check_version (NULL);
513 gcry_control (GCRYCTL_INIT_SECMEM, 32768);
514 gcry_control (GCRYCTL_INITIALIZATION_FINISHED);
515 } /* }}} void network_init_gcrypt */
517 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
518 const void *iv, size_t iv_size, const char *username)
519 {
520 gcry_error_t err;
521 gcry_cipher_hd_t *cyper_ptr;
522 unsigned char password_hash[32];
524 if (se->type == SOCKENT_TYPE_CLIENT)
525 {
526 cyper_ptr = &se->data.client.cypher;
527 memcpy (password_hash, se->data.client.password_hash,
528 sizeof (password_hash));
529 }
530 else
531 {
532 char *secret;
534 cyper_ptr = &se->data.server.cypher;
536 if (username == NULL)
537 return (NULL);
539 secret = fbh_get (se->data.server.userdb, username);
540 if (secret == NULL)
541 return (NULL);
543 gcry_md_hash_buffer (GCRY_MD_SHA256,
544 password_hash,
545 secret, strlen (secret));
547 sfree (secret);
548 }
550 if (*cyper_ptr == NULL)
551 {
552 err = gcry_cipher_open (cyper_ptr,
553 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
554 if (err != 0)
555 {
556 ERROR ("network plugin: gcry_cipher_open returned: %s",
557 gcry_strerror (err));
558 *cyper_ptr = NULL;
559 return (NULL);
560 }
561 }
562 else
563 {
564 gcry_cipher_reset (*cyper_ptr);
565 }
566 assert (*cyper_ptr != NULL);
568 err = gcry_cipher_setkey (*cyper_ptr,
569 password_hash, sizeof (password_hash));
570 if (err != 0)
571 {
572 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
573 gcry_strerror (err));
574 gcry_cipher_close (*cyper_ptr);
575 *cyper_ptr = NULL;
576 return (NULL);
577 }
579 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
580 if (err != 0)
581 {
582 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
583 gcry_strerror (err));
584 gcry_cipher_close (*cyper_ptr);
585 *cyper_ptr = NULL;
586 return (NULL);
587 }
589 return (*cyper_ptr);
590 } /* }}} int network_get_aes256_cypher */
591 #endif /* HAVE_LIBGCRYPT */
593 static int write_part_values (char **ret_buffer, int *ret_buffer_len,
594 const data_set_t *ds, const value_list_t *vl)
595 {
596 char *packet_ptr;
597 int packet_len;
598 int num_values;
600 part_header_t pkg_ph;
601 uint16_t pkg_num_values;
602 uint8_t *pkg_values_types;
603 value_t *pkg_values;
605 int offset;
606 int i;
608 num_values = vl->values_len;
609 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
610 + (num_values * sizeof (uint8_t))
611 + (num_values * sizeof (value_t));
613 if (*ret_buffer_len < packet_len)
614 return (-1);
616 pkg_values_types = malloc (num_values * sizeof (*pkg_values_types));
617 if (pkg_values_types == NULL)
618 {
619 ERROR ("network plugin: write_part_values: malloc failed.");
620 return (-1);
621 }
623 pkg_values = malloc (num_values * sizeof (*pkg_values));
624 if (pkg_values == NULL)
625 {
626 free (pkg_values_types);
627 ERROR ("network plugin: write_part_values: malloc failed.");
628 return (-1);
629 }
631 pkg_ph.type = htons (TYPE_VALUES);
632 pkg_ph.length = htons (packet_len);
634 pkg_num_values = htons ((uint16_t) vl->values_len);
636 for (i = 0; i < num_values; i++)
637 {
638 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
639 switch (ds->ds[i].type)
640 {
641 case DS_TYPE_COUNTER:
642 pkg_values[i].counter = htonll (vl->values[i].counter);
643 break;
645 case DS_TYPE_GAUGE:
646 pkg_values[i].gauge = htond (vl->values[i].gauge);
647 break;
649 case DS_TYPE_DERIVE:
650 pkg_values[i].derive = htonll (vl->values[i].derive);
651 break;
653 case DS_TYPE_ABSOLUTE:
654 pkg_values[i].absolute = htonll (vl->values[i].absolute);
655 break;
657 default:
658 free (pkg_values_types);
659 free (pkg_values);
660 ERROR ("network plugin: write_part_values: "
661 "Unknown data source type: %i",
662 ds->ds[i].type);
663 return (-1);
664 } /* switch (ds->ds[i].type) */
665 } /* for (num_values) */
667 /*
668 * Use `memcpy' to write everything to the buffer, because the pointer
669 * may be unaligned and some architectures, such as SPARC, can't handle
670 * that.
671 */
672 packet_ptr = *ret_buffer;
673 offset = 0;
674 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
675 offset += sizeof (pkg_ph);
676 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
677 offset += sizeof (pkg_num_values);
678 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
679 offset += num_values * sizeof (uint8_t);
680 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
681 offset += num_values * sizeof (value_t);
683 assert (offset == packet_len);
685 *ret_buffer = packet_ptr + packet_len;
686 *ret_buffer_len -= packet_len;
688 free (pkg_values_types);
689 free (pkg_values);
691 return (0);
692 } /* int write_part_values */
694 static int write_part_number (char **ret_buffer, int *ret_buffer_len,
695 int type, uint64_t value)
696 {
697 char *packet_ptr;
698 int packet_len;
700 part_header_t pkg_head;
701 uint64_t pkg_value;
703 int offset;
705 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
707 if (*ret_buffer_len < packet_len)
708 return (-1);
710 pkg_head.type = htons (type);
711 pkg_head.length = htons (packet_len);
712 pkg_value = htonll (value);
714 packet_ptr = *ret_buffer;
715 offset = 0;
716 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
717 offset += sizeof (pkg_head);
718 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
719 offset += sizeof (pkg_value);
721 assert (offset == packet_len);
723 *ret_buffer = packet_ptr + packet_len;
724 *ret_buffer_len -= packet_len;
726 return (0);
727 } /* int write_part_number */
729 static int write_part_string (char **ret_buffer, int *ret_buffer_len,
730 int type, const char *str, int str_len)
731 {
732 char *buffer;
733 int buffer_len;
735 uint16_t pkg_type;
736 uint16_t pkg_length;
738 int offset;
740 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
741 if (*ret_buffer_len < buffer_len)
742 return (-1);
744 pkg_type = htons (type);
745 pkg_length = htons (buffer_len);
747 buffer = *ret_buffer;
748 offset = 0;
749 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
750 offset += sizeof (pkg_type);
751 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
752 offset += sizeof (pkg_length);
753 memcpy (buffer + offset, str, str_len);
754 offset += str_len;
755 memset (buffer + offset, '\0', 1);
756 offset += 1;
758 assert (offset == buffer_len);
760 *ret_buffer = buffer + buffer_len;
761 *ret_buffer_len -= buffer_len;
763 return (0);
764 } /* int write_part_string */
766 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
767 value_t **ret_values, size_t *ret_num_values)
768 {
769 char *buffer = *ret_buffer;
770 size_t buffer_len = *ret_buffer_len;
772 uint16_t tmp16;
773 size_t exp_size;
774 size_t i;
776 uint16_t pkg_length;
777 uint16_t pkg_type;
778 size_t pkg_numval;
780 uint8_t *pkg_types;
781 value_t *pkg_values;
783 if (buffer_len < 15)
784 {
785 NOTICE ("network plugin: packet is too short: "
786 "buffer_len = %zu", buffer_len);
787 return (-1);
788 }
790 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
791 buffer += sizeof (tmp16);
792 pkg_type = ntohs (tmp16);
794 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
795 buffer += sizeof (tmp16);
796 pkg_length = ntohs (tmp16);
798 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
799 buffer += sizeof (tmp16);
800 pkg_numval = (size_t) ntohs (tmp16);
802 assert (pkg_type == TYPE_VALUES);
804 exp_size = 3 * sizeof (uint16_t)
805 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
806 if (buffer_len < exp_size)
807 {
808 WARNING ("network plugin: parse_part_values: "
809 "Packet too short: "
810 "Chunk of size %zu expected, "
811 "but buffer has only %zu bytes left.",
812 exp_size, buffer_len);
813 return (-1);
814 }
815 assert (pkg_numval <= ((buffer_len - 6) / 9));
817 if (pkg_length != exp_size)
818 {
819 WARNING ("network plugin: parse_part_values: "
820 "Length and number of values "
821 "in the packet don't match.");
822 return (-1);
823 }
825 pkg_types = calloc (pkg_numval, sizeof (*pkg_types));
826 pkg_values = calloc (pkg_numval, sizeof (*pkg_values));
827 if ((pkg_types == NULL) || (pkg_values == NULL))
828 {
829 sfree (pkg_types);
830 sfree (pkg_values);
831 ERROR ("network plugin: parse_part_values: calloc failed.");
832 return (-1);
833 }
835 memcpy (pkg_types, buffer, pkg_numval * sizeof (*pkg_types));
836 buffer += pkg_numval * sizeof (*pkg_types);
837 memcpy (pkg_values, buffer, pkg_numval * sizeof (*pkg_values));
838 buffer += pkg_numval * sizeof (*pkg_values);
840 for (i = 0; i < pkg_numval; i++)
841 {
842 switch (pkg_types[i])
843 {
844 case DS_TYPE_COUNTER:
845 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
846 break;
848 case DS_TYPE_GAUGE:
849 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
850 break;
852 case DS_TYPE_DERIVE:
853 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
854 break;
856 case DS_TYPE_ABSOLUTE:
857 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
858 break;
860 default:
861 NOTICE ("network plugin: parse_part_values: "
862 "Don't know how to handle data source type %"PRIu8,
863 pkg_types[i]);
864 sfree (pkg_types);
865 sfree (pkg_values);
866 return (-1);
867 } /* switch (pkg_types[i]) */
868 }
870 *ret_buffer = buffer;
871 *ret_buffer_len = buffer_len - pkg_length;
872 *ret_num_values = pkg_numval;
873 *ret_values = pkg_values;
875 sfree (pkg_types);
877 return (0);
878 } /* int parse_part_values */
880 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
881 uint64_t *value)
882 {
883 char *buffer = *ret_buffer;
884 size_t buffer_len = *ret_buffer_len;
886 uint16_t tmp16;
887 uint64_t tmp64;
888 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
890 uint16_t pkg_length;
892 if (buffer_len < exp_size)
893 {
894 WARNING ("network plugin: parse_part_number: "
895 "Packet too short: "
896 "Chunk of size %zu expected, "
897 "but buffer has only %zu bytes left.",
898 exp_size, buffer_len);
899 return (-1);
900 }
902 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
903 buffer += sizeof (tmp16);
904 /* pkg_type = ntohs (tmp16); */
906 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
907 buffer += sizeof (tmp16);
908 pkg_length = ntohs (tmp16);
910 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
911 buffer += sizeof (tmp64);
912 *value = ntohll (tmp64);
914 *ret_buffer = buffer;
915 *ret_buffer_len = buffer_len - pkg_length;
917 return (0);
918 } /* int parse_part_number */
920 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
921 char *output, size_t const output_len)
922 {
923 char *buffer = *ret_buffer;
924 size_t buffer_len = *ret_buffer_len;
926 uint16_t tmp16;
927 size_t const header_size = 2 * sizeof (uint16_t);
929 uint16_t pkg_length;
930 size_t payload_size;
932 if (output_len == 0)
933 return (EINVAL);
935 if (buffer_len < header_size)
936 {
937 WARNING ("network plugin: parse_part_string: "
938 "Packet too short: "
939 "Chunk of at least size %zu expected, "
940 "but buffer has only %zu bytes left.",
941 header_size, buffer_len);
942 return (-1);
943 }
945 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
946 buffer += sizeof (tmp16);
947 /* pkg_type = ntohs (tmp16); */
949 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
950 buffer += sizeof (tmp16);
951 pkg_length = ntohs (tmp16);
952 payload_size = ((size_t) pkg_length) - header_size;
954 /* Check that packet fits in the input buffer */
955 if (pkg_length > buffer_len)
956 {
957 WARNING ("network plugin: parse_part_string: "
958 "Packet too big: "
959 "Chunk of size %"PRIu16" received, "
960 "but buffer has only %zu bytes left.",
961 pkg_length, buffer_len);
962 return (-1);
963 }
965 /* Check that pkg_length is in the valid range */
966 if (pkg_length <= header_size)
967 {
968 WARNING ("network plugin: parse_part_string: "
969 "Packet too short: "
970 "Header claims this packet is only %hu "
971 "bytes long.", pkg_length);
972 return (-1);
973 }
975 /* Check that the package data fits into the output buffer.
976 * The previous if-statement ensures that:
977 * `pkg_length > header_size' */
978 if (output_len < payload_size)
979 {
980 WARNING ("network plugin: parse_part_string: "
981 "Buffer too small: "
982 "Output buffer holds %zu bytes, "
983 "which is too small to hold the received "
984 "%zu byte string.",
985 output_len, payload_size);
986 return (-1);
987 }
989 /* All sanity checks successfull, let's copy the data over */
990 memcpy ((void *) output, (void *) buffer, payload_size);
991 buffer += payload_size;
993 /* For some very weird reason '\0' doesn't do the trick on SPARC in
994 * this statement. */
995 if (output[payload_size - 1] != 0)
996 {
997 WARNING ("network plugin: parse_part_string: "
998 "Received string does not end "
999 "with a NULL-byte.");
1000 return (-1);
1001 }
1003 *ret_buffer = buffer;
1004 *ret_buffer_len = buffer_len - pkg_length;
1006 return (0);
1007 } /* int parse_part_string */
1009 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
1010 * parse_packet and vice versa. */
1011 #define PP_SIGNED 0x01
1012 #define PP_ENCRYPTED 0x02
1013 static int parse_packet (sockent_t *se,
1014 void *buffer, size_t buffer_size, int flags,
1015 const char *username);
1017 #define BUFFER_READ(p,s) do { \
1018 memcpy ((p), buffer + buffer_offset, (s)); \
1019 buffer_offset += (s); \
1020 } while (0)
1022 #if HAVE_LIBGCRYPT
1023 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1024 void **ret_buffer, size_t *ret_buffer_len, int flags)
1025 {
1026 static c_complain_t complain_no_users = C_COMPLAIN_INIT_STATIC;
1028 char *buffer;
1029 size_t buffer_len;
1030 size_t buffer_offset;
1032 size_t username_len;
1033 char *secret;
1035 part_signature_sha256_t pss;
1036 uint16_t pss_head_length;
1037 char hash[sizeof (pss.hash)];
1039 gcry_md_hd_t hd;
1040 gcry_error_t err;
1041 unsigned char *hash_ptr;
1043 buffer = *ret_buffer;
1044 buffer_len = *ret_buffer_len;
1045 buffer_offset = 0;
1047 if (se->data.server.userdb == NULL)
1048 {
1049 c_complain (LOG_NOTICE, &complain_no_users,
1050 "network plugin: Received signed network packet but can't verify it "
1051 "because no user DB has been configured. Will accept it.");
1052 return (0);
1053 }
1055 /* Check if the buffer has enough data for this structure. */
1056 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
1057 return (-ENOMEM);
1059 /* Read type and length header */
1060 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1061 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1062 pss_head_length = ntohs (pss.head.length);
1064 /* Check if the `pss_head_length' is within bounds. */
1065 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
1066 || (pss_head_length > buffer_len))
1067 {
1068 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
1069 return (-1);
1070 }
1072 /* Copy the hash. */
1073 BUFFER_READ (pss.hash, sizeof (pss.hash));
1075 /* Calculate username length (without null byte) and allocate memory */
1076 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
1077 pss.username = malloc (username_len + 1);
1078 if (pss.username == NULL)
1079 return (-ENOMEM);
1081 /* Read the username */
1082 BUFFER_READ (pss.username, username_len);
1083 pss.username[username_len] = 0;
1085 assert (buffer_offset == pss_head_length);
1087 /* Query the password */
1088 secret = fbh_get (se->data.server.userdb, pss.username);
1089 if (secret == NULL)
1090 {
1091 ERROR ("network plugin: Unknown user: %s", pss.username);
1092 sfree (pss.username);
1093 return (-ENOENT);
1094 }
1096 /* Create a hash device and check the HMAC */
1097 hd = NULL;
1098 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
1099 if (err != 0)
1100 {
1101 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
1102 gcry_strerror (err));
1103 sfree (secret);
1104 sfree (pss.username);
1105 return (-1);
1106 }
1108 err = gcry_md_setkey (hd, secret, strlen (secret));
1109 if (err != 0)
1110 {
1111 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
1112 gcry_md_close (hd);
1113 sfree (secret);
1114 sfree (pss.username);
1115 return (-1);
1116 }
1118 gcry_md_write (hd,
1119 buffer + PART_SIGNATURE_SHA256_SIZE,
1120 buffer_len - PART_SIGNATURE_SHA256_SIZE);
1121 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
1122 if (hash_ptr == NULL)
1123 {
1124 ERROR ("network plugin: gcry_md_read failed.");
1125 gcry_md_close (hd);
1126 sfree (secret);
1127 sfree (pss.username);
1128 return (-1);
1129 }
1130 memcpy (hash, hash_ptr, sizeof (hash));
1132 /* Clean up */
1133 gcry_md_close (hd);
1134 hd = NULL;
1136 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1137 {
1138 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1139 "Hash mismatch.");
1140 }
1141 else
1142 {
1143 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1144 flags | PP_SIGNED, pss.username);
1145 }
1147 sfree (secret);
1148 sfree (pss.username);
1150 *ret_buffer = buffer + buffer_len;
1151 *ret_buffer_len = 0;
1153 return (0);
1154 } /* }}} int parse_part_sign_sha256 */
1155 /* #endif HAVE_LIBGCRYPT */
1157 #else /* if !HAVE_LIBGCRYPT */
1158 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1159 void **ret_buffer, size_t *ret_buffer_size, int flags)
1160 {
1161 static int warning_has_been_printed = 0;
1163 char *buffer;
1164 size_t buffer_size;
1165 size_t buffer_offset;
1166 uint16_t part_len;
1168 part_signature_sha256_t pss;
1170 buffer = *ret_buffer;
1171 buffer_size = *ret_buffer_size;
1172 buffer_offset = 0;
1174 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1175 return (-ENOMEM);
1177 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1178 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1179 part_len = ntohs (pss.head.length);
1181 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1182 || (part_len > buffer_size))
1183 return (-EINVAL);
1185 if (warning_has_been_printed == 0)
1186 {
1187 WARNING ("network plugin: Received signed packet, but the network "
1188 "plugin was not linked with libgcrypt, so I cannot "
1189 "verify the signature. The packet will be accepted.");
1190 warning_has_been_printed = 1;
1191 }
1193 parse_packet (se, buffer + part_len, buffer_size - part_len, flags,
1194 /* username = */ NULL);
1196 *ret_buffer = buffer + buffer_size;
1197 *ret_buffer_size = 0;
1199 return (0);
1200 } /* }}} int parse_part_sign_sha256 */
1201 #endif /* !HAVE_LIBGCRYPT */
1203 #if HAVE_LIBGCRYPT
1204 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1205 void **ret_buffer, size_t *ret_buffer_len,
1206 int flags)
1207 {
1208 char *buffer = *ret_buffer;
1209 size_t buffer_len = *ret_buffer_len;
1210 size_t payload_len;
1211 size_t part_size;
1212 size_t buffer_offset;
1213 uint16_t username_len;
1214 part_encryption_aes256_t pea;
1215 unsigned char hash[sizeof (pea.hash)];
1217 gcry_cipher_hd_t cypher;
1218 gcry_error_t err;
1220 /* Make sure at least the header if available. */
1221 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1222 {
1223 NOTICE ("network plugin: parse_part_encr_aes256: "
1224 "Discarding short packet.");
1225 return (-1);
1226 }
1228 buffer_offset = 0;
1230 /* Copy the unencrypted information into `pea'. */
1231 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1232 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1234 /* Check the `part size'. */
1235 part_size = ntohs (pea.head.length);
1236 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1237 || (part_size > buffer_len))
1238 {
1239 NOTICE ("network plugin: parse_part_encr_aes256: "
1240 "Discarding part with invalid size.");
1241 return (-1);
1242 }
1244 /* Read the username */
1245 BUFFER_READ (&username_len, sizeof (username_len));
1246 username_len = ntohs (username_len);
1248 if ((username_len == 0)
1249 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1250 {
1251 NOTICE ("network plugin: parse_part_encr_aes256: "
1252 "Discarding part with invalid username length.");
1253 return (-1);
1254 }
1256 assert (username_len > 0);
1257 pea.username = malloc (username_len + 1);
1258 if (pea.username == NULL)
1259 return (-ENOMEM);
1260 BUFFER_READ (pea.username, username_len);
1261 pea.username[username_len] = 0;
1263 /* Last but not least, the initialization vector */
1264 BUFFER_READ (pea.iv, sizeof (pea.iv));
1266 /* Make sure we are at the right position */
1267 assert (buffer_offset == (username_len +
1268 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1270 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1271 pea.username);
1272 if (cypher == NULL)
1273 {
1274 sfree (pea.username);
1275 return (-1);
1276 }
1278 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1279 assert (payload_len > 0);
1281 /* Decrypt the packet in-place */
1282 err = gcry_cipher_decrypt (cypher,
1283 buffer + buffer_offset,
1284 part_size - buffer_offset,
1285 /* in = */ NULL, /* in len = */ 0);
1286 if (err != 0)
1287 {
1288 sfree (pea.username);
1289 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1290 gcry_strerror (err));
1291 return (-1);
1292 }
1294 /* Read the hash */
1295 BUFFER_READ (pea.hash, sizeof (pea.hash));
1297 /* Make sure we're at the right position - again */
1298 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1299 assert (buffer_offset == (part_size - payload_len));
1301 /* Check hash sum */
1302 memset (hash, 0, sizeof (hash));
1303 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1304 buffer + buffer_offset, payload_len);
1305 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1306 {
1307 sfree (pea.username);
1308 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1309 return (-1);
1310 }
1312 parse_packet (se, buffer + buffer_offset, payload_len,
1313 flags | PP_ENCRYPTED, pea.username);
1315 /* XXX: Free pea.username?!? */
1317 /* Update return values */
1318 *ret_buffer = buffer + part_size;
1319 *ret_buffer_len = buffer_len - part_size;
1321 sfree (pea.username);
1323 return (0);
1324 } /* }}} int parse_part_encr_aes256 */
1325 /* #endif HAVE_LIBGCRYPT */
1327 #else /* if !HAVE_LIBGCRYPT */
1328 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1329 void **ret_buffer, size_t *ret_buffer_size, int flags)
1330 {
1331 static int warning_has_been_printed = 0;
1333 char *buffer;
1334 size_t buffer_size;
1335 size_t buffer_offset;
1337 part_header_t ph;
1338 size_t ph_length;
1340 buffer = *ret_buffer;
1341 buffer_size = *ret_buffer_size;
1342 buffer_offset = 0;
1344 /* parse_packet assures this minimum size. */
1345 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1347 BUFFER_READ (&ph.type, sizeof (ph.type));
1348 BUFFER_READ (&ph.length, sizeof (ph.length));
1349 ph_length = ntohs (ph.length);
1351 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1352 || (ph_length > buffer_size))
1353 {
1354 ERROR ("network plugin: AES-256 encrypted part "
1355 "with invalid length received.");
1356 return (-1);
1357 }
1359 if (warning_has_been_printed == 0)
1360 {
1361 WARNING ("network plugin: Received encrypted packet, but the network "
1362 "plugin was not linked with libgcrypt, so I cannot "
1363 "decrypt it. The part will be discarded.");
1364 warning_has_been_printed = 1;
1365 }
1367 *ret_buffer = (void *) (((char *) *ret_buffer) + ph_length);
1368 *ret_buffer_size -= ph_length;
1370 return (0);
1371 } /* }}} int parse_part_encr_aes256 */
1372 #endif /* !HAVE_LIBGCRYPT */
1374 #undef BUFFER_READ
1376 static int parse_packet (sockent_t *se, /* {{{ */
1377 void *buffer, size_t buffer_size, int flags,
1378 const char *username)
1379 {
1380 int status;
1382 value_list_t vl = VALUE_LIST_INIT;
1383 notification_t n;
1385 #if HAVE_LIBGCRYPT
1386 int packet_was_signed = (flags & PP_SIGNED);
1387 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1388 int printed_ignore_warning = 0;
1389 #endif /* HAVE_LIBGCRYPT */
1392 memset (&vl, '\0', sizeof (vl));
1393 memset (&n, '\0', sizeof (n));
1394 status = 0;
1396 while ((status == 0) && (0 < buffer_size)
1397 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1398 {
1399 uint16_t pkg_length;
1400 uint16_t pkg_type;
1402 memcpy ((void *) &pkg_type,
1403 (void *) buffer,
1404 sizeof (pkg_type));
1405 memcpy ((void *) &pkg_length,
1406 (void *) (((char *) buffer) + sizeof (pkg_type)),
1407 sizeof (pkg_length));
1409 pkg_length = ntohs (pkg_length);
1410 pkg_type = ntohs (pkg_type);
1412 if (pkg_length > buffer_size)
1413 break;
1414 /* Ensure that this loop terminates eventually */
1415 if (pkg_length < (2 * sizeof (uint16_t)))
1416 break;
1418 if (pkg_type == TYPE_ENCR_AES256)
1419 {
1420 status = parse_part_encr_aes256 (se,
1421 &buffer, &buffer_size, flags);
1422 if (status != 0)
1423 {
1424 ERROR ("network plugin: Decrypting AES256 "
1425 "part failed "
1426 "with status %i.", status);
1427 break;
1428 }
1429 }
1430 #if HAVE_LIBGCRYPT
1431 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1432 && (packet_was_encrypted == 0))
1433 {
1434 if (printed_ignore_warning == 0)
1435 {
1436 INFO ("network plugin: Unencrypted packet or "
1437 "part has been ignored.");
1438 printed_ignore_warning = 1;
1439 }
1440 buffer = ((char *) buffer) + pkg_length;
1441 buffer_size -= (size_t) pkg_length;
1442 continue;
1443 }
1444 #endif /* HAVE_LIBGCRYPT */
1445 else if (pkg_type == TYPE_SIGN_SHA256)
1446 {
1447 status = parse_part_sign_sha256 (se,
1448 &buffer, &buffer_size, flags);
1449 if (status != 0)
1450 {
1451 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1452 "signature failed "
1453 "with status %i.", status);
1454 break;
1455 }
1456 }
1457 #if HAVE_LIBGCRYPT
1458 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1459 && (packet_was_encrypted == 0)
1460 && (packet_was_signed == 0))
1461 {
1462 if (printed_ignore_warning == 0)
1463 {
1464 INFO ("network plugin: Unsigned packet or "
1465 "part has been ignored.");
1466 printed_ignore_warning = 1;
1467 }
1468 buffer = ((char *) buffer) + pkg_length;
1469 buffer_size -= (size_t) pkg_length;
1470 continue;
1471 }
1472 #endif /* HAVE_LIBGCRYPT */
1473 else if (pkg_type == TYPE_VALUES)
1474 {
1475 status = parse_part_values (&buffer, &buffer_size,
1476 &vl.values, &vl.values_len);
1477 if (status != 0)
1478 break;
1480 network_dispatch_values (&vl, username);
1482 sfree (vl.values);
1483 }
1484 else if (pkg_type == TYPE_TIME)
1485 {
1486 uint64_t tmp = 0;
1487 status = parse_part_number (&buffer, &buffer_size,
1488 &tmp);
1489 if (status == 0)
1490 {
1491 vl.time = TIME_T_TO_CDTIME_T (tmp);
1492 n.time = TIME_T_TO_CDTIME_T (tmp);
1493 }
1494 }
1495 else if (pkg_type == TYPE_TIME_HR)
1496 {
1497 uint64_t tmp = 0;
1498 status = parse_part_number (&buffer, &buffer_size,
1499 &tmp);
1500 if (status == 0)
1501 {
1502 vl.time = (cdtime_t) tmp;
1503 n.time = (cdtime_t) tmp;
1504 }
1505 }
1506 else if (pkg_type == TYPE_INTERVAL)
1507 {
1508 uint64_t tmp = 0;
1509 status = parse_part_number (&buffer, &buffer_size,
1510 &tmp);
1511 if (status == 0)
1512 vl.interval = TIME_T_TO_CDTIME_T (tmp);
1513 }
1514 else if (pkg_type == TYPE_INTERVAL_HR)
1515 {
1516 uint64_t tmp = 0;
1517 status = parse_part_number (&buffer, &buffer_size,
1518 &tmp);
1519 if (status == 0)
1520 vl.interval = (cdtime_t) tmp;
1521 }
1522 else if (pkg_type == TYPE_HOST)
1523 {
1524 status = parse_part_string (&buffer, &buffer_size,
1525 vl.host, sizeof (vl.host));
1526 if (status == 0)
1527 sstrncpy (n.host, vl.host, sizeof (n.host));
1528 }
1529 else if (pkg_type == TYPE_PLUGIN)
1530 {
1531 status = parse_part_string (&buffer, &buffer_size,
1532 vl.plugin, sizeof (vl.plugin));
1533 if (status == 0)
1534 sstrncpy (n.plugin, vl.plugin,
1535 sizeof (n.plugin));
1536 }
1537 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1538 {
1539 status = parse_part_string (&buffer, &buffer_size,
1540 vl.plugin_instance,
1541 sizeof (vl.plugin_instance));
1542 if (status == 0)
1543 sstrncpy (n.plugin_instance,
1544 vl.plugin_instance,
1545 sizeof (n.plugin_instance));
1546 }
1547 else if (pkg_type == TYPE_TYPE)
1548 {
1549 status = parse_part_string (&buffer, &buffer_size,
1550 vl.type, sizeof (vl.type));
1551 if (status == 0)
1552 sstrncpy (n.type, vl.type, sizeof (n.type));
1553 }
1554 else if (pkg_type == TYPE_TYPE_INSTANCE)
1555 {
1556 status = parse_part_string (&buffer, &buffer_size,
1557 vl.type_instance,
1558 sizeof (vl.type_instance));
1559 if (status == 0)
1560 sstrncpy (n.type_instance, vl.type_instance,
1561 sizeof (n.type_instance));
1562 }
1563 else if (pkg_type == TYPE_MESSAGE)
1564 {
1565 status = parse_part_string (&buffer, &buffer_size,
1566 n.message, sizeof (n.message));
1568 if (status != 0)
1569 {
1570 /* do nothing */
1571 }
1572 else if ((n.severity != NOTIF_FAILURE)
1573 && (n.severity != NOTIF_WARNING)
1574 && (n.severity != NOTIF_OKAY))
1575 {
1576 INFO ("network plugin: "
1577 "Ignoring notification with "
1578 "unknown severity %i.",
1579 n.severity);
1580 }
1581 else if (n.time == 0)
1582 {
1583 INFO ("network plugin: "
1584 "Ignoring notification with "
1585 "time == 0.");
1586 }
1587 else if (strlen (n.message) == 0)
1588 {
1589 INFO ("network plugin: "
1590 "Ignoring notification with "
1591 "an empty message.");
1592 }
1593 else
1594 {
1595 network_dispatch_notification (&n);
1596 }
1597 }
1598 else if (pkg_type == TYPE_SEVERITY)
1599 {
1600 uint64_t tmp = 0;
1601 status = parse_part_number (&buffer, &buffer_size,
1602 &tmp);
1603 if (status == 0)
1604 n.severity = (int) tmp;
1605 }
1606 else
1607 {
1608 DEBUG ("network plugin: parse_packet: Unknown part"
1609 " type: 0x%04hx", pkg_type);
1610 buffer = ((char *) buffer) + pkg_length;
1611 buffer_size -= (size_t) pkg_length;
1612 }
1613 } /* while (buffer_size > sizeof (part_header_t)) */
1615 if (status == 0 && buffer_size > 0)
1616 WARNING ("network plugin: parse_packet: Received truncated "
1617 "packet, try increasing `MaxPacketSize'");
1619 return (status);
1620 } /* }}} int parse_packet */
1622 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1623 {
1624 if (sec->fd >= 0)
1625 {
1626 close (sec->fd);
1627 sec->fd = -1;
1628 }
1629 sfree (sec->addr);
1630 #if HAVE_LIBGCRYPT
1631 sfree (sec->username);
1632 sfree (sec->password);
1633 if (sec->cypher != NULL)
1634 gcry_cipher_close (sec->cypher);
1635 #endif
1636 } /* }}} void free_sockent_client */
1638 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1639 {
1640 size_t i;
1642 for (i = 0; i < ses->fd_num; i++)
1643 {
1644 if (ses->fd[i] >= 0)
1645 {
1646 close (ses->fd[i]);
1647 ses->fd[i] = -1;
1648 }
1649 }
1651 sfree (ses->fd);
1652 #if HAVE_LIBGCRYPT
1653 sfree (ses->auth_file);
1654 fbh_destroy (ses->userdb);
1655 if (ses->cypher != NULL)
1656 gcry_cipher_close (ses->cypher);
1657 #endif
1658 } /* }}} void free_sockent_server */
1660 static void sockent_destroy (sockent_t *se) /* {{{ */
1661 {
1662 sockent_t *next;
1664 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1666 while (se != NULL)
1667 {
1668 next = se->next;
1670 sfree (se->node);
1671 sfree (se->service);
1673 if (se->type == SOCKENT_TYPE_CLIENT)
1674 free_sockent_client (&se->data.client);
1675 else
1676 free_sockent_server (&se->data.server);
1678 sfree (se);
1679 se = next;
1680 }
1681 } /* }}} void sockent_destroy */
1683 /*
1684 * int network_set_ttl
1685 *
1686 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1687 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1688 *
1689 * The `struct addrinfo' is used to destinguish between unicast and multicast
1690 * sockets.
1691 */
1692 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1693 {
1694 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1695 network_config_ttl);
1697 assert (se->type == SOCKENT_TYPE_CLIENT);
1699 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1700 return (-1);
1702 if (ai->ai_family == AF_INET)
1703 {
1704 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1705 int optname;
1707 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1708 optname = IP_MULTICAST_TTL;
1709 else
1710 optname = IP_TTL;
1712 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1713 &network_config_ttl,
1714 sizeof (network_config_ttl)) != 0)
1715 {
1716 char errbuf[1024];
1717 ERROR ("network plugin: setsockopt (ipv4-ttl): %s",
1718 sstrerror (errno, errbuf, sizeof (errbuf)));
1719 return (-1);
1720 }
1721 }
1722 else if (ai->ai_family == AF_INET6)
1723 {
1724 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1725 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1726 int optname;
1728 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1729 optname = IPV6_MULTICAST_HOPS;
1730 else
1731 optname = IPV6_UNICAST_HOPS;
1733 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1734 &network_config_ttl,
1735 sizeof (network_config_ttl)) != 0)
1736 {
1737 char errbuf[1024];
1738 ERROR ("network plugin: setsockopt(ipv6-ttl): %s",
1739 sstrerror (errno, errbuf,
1740 sizeof (errbuf)));
1741 return (-1);
1742 }
1743 }
1745 return (0);
1746 } /* int network_set_ttl */
1748 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1749 {
1750 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1751 se->interface);
1753 assert (se->type == SOCKENT_TYPE_CLIENT);
1755 if (ai->ai_family == AF_INET)
1756 {
1757 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1759 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1760 {
1761 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1762 /* If possible, use the "ip_mreqn" structure which has
1763 * an "interface index" member. Using the interface
1764 * index is preferred here, because of its similarity
1765 * to the way IPv6 handles this. Unfortunately, it
1766 * appears not to be portable. */
1767 struct ip_mreqn mreq;
1769 memset (&mreq, 0, sizeof (mreq));
1770 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1771 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1772 mreq.imr_ifindex = se->interface;
1773 #else
1774 struct ip_mreq mreq;
1776 memset (&mreq, 0, sizeof (mreq));
1777 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1778 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1779 #endif
1781 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1782 &mreq, sizeof (mreq)) != 0)
1783 {
1784 char errbuf[1024];
1785 ERROR ("network plugin: setsockopt (ipv4-multicast-if): %s",
1786 sstrerror (errno, errbuf, sizeof (errbuf)));
1787 return (-1);
1788 }
1790 return (0);
1791 }
1792 }
1793 else if (ai->ai_family == AF_INET6)
1794 {
1795 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1797 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1798 {
1799 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1800 &se->interface,
1801 sizeof (se->interface)) != 0)
1802 {
1803 char errbuf[1024];
1804 ERROR ("network plugin: setsockopt (ipv6-multicast-if): %s",
1805 sstrerror (errno, errbuf,
1806 sizeof (errbuf)));
1807 return (-1);
1808 }
1810 return (0);
1811 }
1812 }
1814 /* else: Not a multicast interface. */
1815 if (se->interface != 0)
1816 {
1817 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1818 char interface_name[IFNAMSIZ];
1820 if (if_indextoname (se->interface, interface_name) == NULL)
1821 return (-1);
1823 DEBUG ("network plugin: Binding socket to interface %s", interface_name);
1825 if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
1826 interface_name,
1827 sizeof(interface_name)) == -1 )
1828 {
1829 char errbuf[1024];
1830 ERROR ("network plugin: setsockopt (bind-if): %s",
1831 sstrerror (errno, errbuf, sizeof (errbuf)));
1832 return (-1);
1833 }
1834 /* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1836 #else
1837 WARNING ("network plugin: Cannot set the interface on a unicast "
1838 "socket because "
1839 # if !defined(SO_BINDTODEVICE)
1840 "the \"SO_BINDTODEVICE\" socket option "
1841 # else
1842 "the \"if_indextoname\" function "
1843 # endif
1844 "is not available on your system.");
1845 #endif
1847 }
1849 return (0);
1850 } /* }}} network_set_interface */
1852 static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
1853 {
1854 #if KERNEL_SOLARIS
1855 char loop = 0;
1856 #else
1857 int loop = 0;
1858 #endif
1859 int yes = 1;
1861 /* allow multiple sockets to use the same PORT number */
1862 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1863 &yes, sizeof(yes)) == -1) {
1864 char errbuf[1024];
1865 ERROR ("network plugin: setsockopt (reuseaddr): %s",
1866 sstrerror (errno, errbuf, sizeof (errbuf)));
1867 return (-1);
1868 }
1870 DEBUG ("fd = %i; calling `bind'", fd);
1872 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1873 {
1874 char errbuf[1024];
1875 ERROR ("bind: %s",
1876 sstrerror (errno, errbuf, sizeof (errbuf)));
1877 return (-1);
1878 }
1880 if (ai->ai_family == AF_INET)
1881 {
1882 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1883 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1884 {
1885 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1886 struct ip_mreqn mreq;
1887 #else
1888 struct ip_mreq mreq;
1889 #endif
1891 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1893 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1894 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1895 /* Set the interface using the interface index if
1896 * possible (available). Unfortunately, the struct
1897 * ip_mreqn is not portable. */
1898 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1899 mreq.imr_ifindex = interface_idx;
1900 #else
1901 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1902 #endif
1904 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1905 &loop, sizeof (loop)) == -1)
1906 {
1907 char errbuf[1024];
1908 ERROR ("network plugin: setsockopt (multicast-loop): %s",
1909 sstrerror (errno, errbuf,
1910 sizeof (errbuf)));
1911 return (-1);
1912 }
1914 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1915 &mreq, sizeof (mreq)) == -1)
1916 {
1917 char errbuf[1024];
1918 ERROR ("network plugin: setsockopt (add-membership): %s",
1919 sstrerror (errno, errbuf,
1920 sizeof (errbuf)));
1921 return (-1);
1922 }
1924 return (0);
1925 }
1926 }
1927 else if (ai->ai_family == AF_INET6)
1928 {
1929 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1930 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1931 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1932 {
1933 struct ipv6_mreq mreq;
1935 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1937 memcpy (&mreq.ipv6mr_multiaddr,
1938 &addr->sin6_addr,
1939 sizeof (addr->sin6_addr));
1941 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1942 * ipv6mr_interface may be set to zeroes to
1943 * choose the default multicast interface or to
1944 * the index of a particular multicast-capable
1945 * interface if the host is multihomed.
1946 * Membership is associ-associated with a
1947 * single interface; programs running on
1948 * multihomed hosts may need to join the same
1949 * group on more than one interface.*/
1950 mreq.ipv6mr_interface = interface_idx;
1952 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1953 &loop, sizeof (loop)) == -1)
1954 {
1955 char errbuf[1024];
1956 ERROR ("network plugin: setsockopt (ipv6-multicast-loop): %s",
1957 sstrerror (errno, errbuf,
1958 sizeof (errbuf)));
1959 return (-1);
1960 }
1962 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1963 &mreq, sizeof (mreq)) == -1)
1964 {
1965 char errbuf[1024];
1966 ERROR ("network plugin: setsockopt (ipv6-add-membership): %s",
1967 sstrerror (errno, errbuf,
1968 sizeof (errbuf)));
1969 return (-1);
1970 }
1972 return (0);
1973 }
1974 }
1976 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1977 /* if a specific interface was set, bind the socket to it. But to avoid
1978 * possible problems with multicast routing, only do that for non-multicast
1979 * addresses */
1980 if (interface_idx != 0)
1981 {
1982 char interface_name[IFNAMSIZ];
1984 if (if_indextoname (interface_idx, interface_name) == NULL)
1985 return (-1);
1987 DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
1989 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
1990 interface_name,
1991 sizeof(interface_name)) == -1 )
1992 {
1993 char errbuf[1024];
1994 ERROR ("network plugin: setsockopt (bind-if): %s",
1995 sstrerror (errno, errbuf, sizeof (errbuf)));
1996 return (-1);
1997 }
1998 }
1999 #endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
2001 return (0);
2002 } /* int network_bind_socket */
2004 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
2005 * or `SOCKENT_TYPE_SERVER' */
2006 static sockent_t *sockent_create (int type) /* {{{ */
2007 {
2008 sockent_t *se;
2010 if ((type != SOCKENT_TYPE_CLIENT) && (type != SOCKENT_TYPE_SERVER))
2011 return (NULL);
2013 se = calloc (1, sizeof (*se));
2014 if (se == NULL)
2015 return (NULL);
2017 se->type = type;
2018 se->node = NULL;
2019 se->service = NULL;
2020 se->interface = 0;
2021 se->next = NULL;
2023 if (type == SOCKENT_TYPE_SERVER)
2024 {
2025 se->data.server.fd = NULL;
2026 se->data.server.fd_num = 0;
2027 #if HAVE_LIBGCRYPT
2028 se->data.server.security_level = SECURITY_LEVEL_NONE;
2029 se->data.server.auth_file = NULL;
2030 se->data.server.userdb = NULL;
2031 se->data.server.cypher = NULL;
2032 #endif
2033 }
2034 else
2035 {
2036 se->data.client.fd = -1;
2037 se->data.client.addr = NULL;
2038 se->data.client.resolve_interval = 0;
2039 se->data.client.next_resolve_reconnect = 0;
2040 #if HAVE_LIBGCRYPT
2041 se->data.client.security_level = SECURITY_LEVEL_NONE;
2042 se->data.client.username = NULL;
2043 se->data.client.password = NULL;
2044 se->data.client.cypher = NULL;
2045 #endif
2046 }
2048 return (se);
2049 } /* }}} sockent_t *sockent_create */
2051 static int sockent_init_crypto (sockent_t *se) /* {{{ */
2052 {
2053 #if HAVE_LIBGCRYPT /* {{{ */
2054 if (se->type == SOCKENT_TYPE_CLIENT)
2055 {
2056 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
2057 {
2058 network_init_gcrypt ();
2060 if ((se->data.client.username == NULL)
2061 || (se->data.client.password == NULL))
2062 {
2063 ERROR ("network plugin: Client socket with "
2064 "security requested, but no "
2065 "credentials are configured.");
2066 return (-1);
2067 }
2068 gcry_md_hash_buffer (GCRY_MD_SHA256,
2069 se->data.client.password_hash,
2070 se->data.client.password,
2071 strlen (se->data.client.password));
2072 }
2073 }
2074 else /* (se->type == SOCKENT_TYPE_SERVER) */
2075 {
2076 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2077 {
2078 network_init_gcrypt ();
2080 if (se->data.server.auth_file == NULL)
2081 {
2082 ERROR ("network plugin: Server socket with "
2083 "security requested, but no "
2084 "password file is configured.");
2085 return (-1);
2086 }
2087 }
2088 if (se->data.server.auth_file != NULL)
2089 {
2090 se->data.server.userdb = fbh_create (se->data.server.auth_file);
2091 if (se->data.server.userdb == NULL)
2092 {
2093 ERROR ("network plugin: Reading password file "
2094 "`%s' failed.",
2095 se->data.server.auth_file);
2096 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2097 return (-1);
2098 }
2099 }
2100 }
2101 #endif /* }}} HAVE_LIBGCRYPT */
2103 return (0);
2104 } /* }}} int sockent_init_crypto */
2106 static int sockent_client_disconnect (sockent_t *se) /* {{{ */
2107 {
2108 struct sockent_client *client;
2110 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2111 return (EINVAL);
2113 client = &se->data.client;
2114 if (client->fd >= 0) /* connected */
2115 {
2116 close (client->fd);
2117 client->fd = -1;
2118 }
2120 sfree (client->addr);
2121 client->addrlen = 0;
2123 return (0);
2124 } /* }}} int sockent_client_disconnect */
2126 static int sockent_client_connect (sockent_t *se) /* {{{ */
2127 {
2128 static c_complain_t complaint = C_COMPLAIN_INIT_STATIC;
2130 struct sockent_client *client;
2131 struct addrinfo ai_hints;
2132 struct addrinfo *ai_list = NULL, *ai_ptr;
2133 int status;
2134 _Bool reconnect = 0;
2135 cdtime_t now;
2137 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2138 return (EINVAL);
2140 client = &se->data.client;
2142 now = cdtime ();
2143 if (client->resolve_interval != 0 && client->next_resolve_reconnect < now) {
2144 DEBUG("network plugin: Reconnecting socket, resolve_interval = %lf, next_resolve_reconnect = %lf",
2145 CDTIME_T_TO_DOUBLE(client->resolve_interval), CDTIME_T_TO_DOUBLE(client->next_resolve_reconnect));
2146 reconnect = 1;
2147 }
2149 if (client->fd >= 0 && !reconnect) /* already connected and not stale*/
2150 return (0);
2152 memset (&ai_hints, 0, sizeof (ai_hints));
2153 #ifdef AI_ADDRCONFIG
2154 ai_hints.ai_flags |= AI_ADDRCONFIG;
2155 #endif
2156 ai_hints.ai_family = AF_UNSPEC;
2157 ai_hints.ai_socktype = SOCK_DGRAM;
2158 ai_hints.ai_protocol = IPPROTO_UDP;
2160 status = getaddrinfo (se->node,
2161 (se->service != NULL) ? se->service : NET_DEFAULT_PORT,
2162 &ai_hints, &ai_list);
2163 if (status != 0)
2164 {
2165 c_complain (LOG_ERR, &complaint,
2166 "network plugin: getaddrinfo (%s, %s) failed: %s",
2167 (se->node == NULL) ? "(null)" : se->node,
2168 (se->service == NULL) ? "(null)" : se->service,
2169 gai_strerror (status));
2170 return (-1);
2171 }
2172 else
2173 {
2174 c_release (LOG_NOTICE, &complaint,
2175 "network plugin: Successfully resolved \"%s\".",
2176 se->node);
2177 }
2179 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2180 {
2181 if (client->fd >= 0) /* when we reconnect */
2182 sockent_client_disconnect(se);
2184 client->fd = socket (ai_ptr->ai_family,
2185 ai_ptr->ai_socktype,
2186 ai_ptr->ai_protocol);
2187 if (client->fd < 0)
2188 {
2189 char errbuf[1024];
2190 ERROR ("network plugin: socket(2) failed: %s",
2191 sstrerror (errno, errbuf,
2192 sizeof (errbuf)));
2193 continue;
2194 }
2196 client->addr = calloc (1, sizeof (*client->addr));
2197 if (client->addr == NULL)
2198 {
2199 ERROR ("network plugin: calloc failed.");
2200 close (client->fd);
2201 client->fd = -1;
2202 continue;
2203 }
2205 assert (sizeof (*client->addr) >= ai_ptr->ai_addrlen);
2206 memcpy (client->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2207 client->addrlen = ai_ptr->ai_addrlen;
2209 network_set_ttl (se, ai_ptr);
2210 network_set_interface (se, ai_ptr);
2212 /* We don't open more than one write-socket per
2213 * node/service pair.. */
2214 break;
2215 }
2217 freeaddrinfo (ai_list);
2218 if (client->fd < 0)
2219 return (-1);
2221 if (client->resolve_interval > 0)
2222 client->next_resolve_reconnect = now + client->resolve_interval;
2223 return (0);
2224 } /* }}} int sockent_client_connect */
2226 /* Open the file descriptors for a initialized sockent structure. */
2227 static int sockent_server_listen (sockent_t *se) /* {{{ */
2228 {
2229 struct addrinfo ai_hints;
2230 struct addrinfo *ai_list, *ai_ptr;
2231 int status;
2233 const char *node;
2234 const char *service;
2236 if (se == NULL)
2237 return (-1);
2239 assert (se->data.server.fd == NULL);
2240 assert (se->data.server.fd_num == 0);
2242 node = se->node;
2243 service = se->service;
2245 if (service == NULL)
2246 service = NET_DEFAULT_PORT;
2248 DEBUG ("network plugin: sockent_server_listen: node = %s; service = %s;",
2249 node, service);
2251 memset (&ai_hints, 0, sizeof (ai_hints));
2252 ai_hints.ai_flags = 0;
2253 #ifdef AI_PASSIVE
2254 ai_hints.ai_flags |= AI_PASSIVE;
2255 #endif
2256 #ifdef AI_ADDRCONFIG
2257 ai_hints.ai_flags |= AI_ADDRCONFIG;
2258 #endif
2259 ai_hints.ai_family = AF_UNSPEC;
2260 ai_hints.ai_socktype = SOCK_DGRAM;
2261 ai_hints.ai_protocol = IPPROTO_UDP;
2263 status = getaddrinfo (node, service, &ai_hints, &ai_list);
2264 if (status != 0)
2265 {
2266 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
2267 (se->node == NULL) ? "(null)" : se->node,
2268 (se->service == NULL) ? "(null)" : se->service,
2269 gai_strerror (status));
2270 return (-1);
2271 }
2273 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2274 {
2275 int *tmp;
2277 tmp = realloc (se->data.server.fd,
2278 sizeof (*tmp) * (se->data.server.fd_num + 1));
2279 if (tmp == NULL)
2280 {
2281 ERROR ("network plugin: realloc failed.");
2282 continue;
2283 }
2284 se->data.server.fd = tmp;
2285 tmp = se->data.server.fd + se->data.server.fd_num;
2287 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
2288 ai_ptr->ai_protocol);
2289 if (*tmp < 0)
2290 {
2291 char errbuf[1024];
2292 ERROR ("network plugin: socket(2) failed: %s",
2293 sstrerror (errno, errbuf,
2294 sizeof (errbuf)));
2295 continue;
2296 }
2298 status = network_bind_socket (*tmp, ai_ptr, se->interface);
2299 if (status != 0)
2300 {
2301 close (*tmp);
2302 *tmp = -1;
2303 continue;
2304 }
2306 se->data.server.fd_num++;
2307 continue;
2308 } /* for (ai_list) */
2310 freeaddrinfo (ai_list);
2312 if (se->data.server.fd_num == 0)
2313 return (-1);
2314 return (0);
2315 } /* }}} int sockent_server_listen */
2317 /* Add a sockent to the global list of sockets */
2318 static int sockent_add (sockent_t *se) /* {{{ */
2319 {
2320 sockent_t *last_ptr;
2322 if (se == NULL)
2323 return (-1);
2325 if (se->type == SOCKENT_TYPE_SERVER)
2326 {
2327 struct pollfd *tmp;
2328 size_t i;
2330 tmp = realloc (listen_sockets_pollfd,
2331 sizeof (*tmp) * (listen_sockets_num
2332 + se->data.server.fd_num));
2333 if (tmp == NULL)
2334 {
2335 ERROR ("network plugin: realloc failed.");
2336 return (-1);
2337 }
2338 listen_sockets_pollfd = tmp;
2339 tmp = listen_sockets_pollfd + listen_sockets_num;
2341 for (i = 0; i < se->data.server.fd_num; i++)
2342 {
2343 memset (tmp + i, 0, sizeof (*tmp));
2344 tmp[i].fd = se->data.server.fd[i];
2345 tmp[i].events = POLLIN | POLLPRI;
2346 tmp[i].revents = 0;
2347 }
2349 listen_sockets_num += se->data.server.fd_num;
2351 if (listen_sockets == NULL)
2352 {
2353 listen_sockets = se;
2354 return (0);
2355 }
2356 last_ptr = listen_sockets;
2357 }
2358 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2359 {
2360 if (sending_sockets == NULL)
2361 {
2362 sending_sockets = se;
2363 return (0);
2364 }
2365 last_ptr = sending_sockets;
2366 }
2368 while (last_ptr->next != NULL)
2369 last_ptr = last_ptr->next;
2370 last_ptr->next = se;
2372 return (0);
2373 } /* }}} int sockent_add */
2375 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
2376 {
2377 while (42)
2378 {
2379 receive_list_entry_t *ent;
2380 sockent_t *se;
2382 /* Lock and wait for more data to come in */
2383 pthread_mutex_lock (&receive_list_lock);
2384 while ((listen_loop == 0)
2385 && (receive_list_head == NULL))
2386 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
2388 /* Remove the head entry and unlock */
2389 ent = receive_list_head;
2390 if (ent != NULL)
2391 receive_list_head = ent->next;
2392 receive_list_length--;
2393 pthread_mutex_unlock (&receive_list_lock);
2395 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2396 * because we dispatch all missing packets before shutting down. */
2397 if (ent == NULL)
2398 break;
2400 /* Look for the correct `sockent_t' */
2401 se = listen_sockets;
2402 while (se != NULL)
2403 {
2404 size_t i;
2406 for (i = 0; i < se->data.server.fd_num; i++)
2407 if (se->data.server.fd[i] == ent->fd)
2408 break;
2410 if (i < se->data.server.fd_num)
2411 break;
2413 se = se->next;
2414 }
2416 if (se == NULL)
2417 {
2418 ERROR ("network plugin: Got packet from FD %i, but can't "
2419 "find an appropriate socket entry.",
2420 ent->fd);
2421 sfree (ent->data);
2422 sfree (ent);
2423 continue;
2424 }
2426 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0,
2427 /* username = */ NULL);
2428 sfree (ent->data);
2429 sfree (ent);
2430 } /* while (42) */
2432 return (NULL);
2433 } /* }}} void *dispatch_thread */
2435 static int network_receive (void) /* {{{ */
2436 {
2437 char buffer[network_config_packet_size];
2438 int buffer_len;
2440 size_t i;
2441 int status = 0;
2443 receive_list_entry_t *private_list_head;
2444 receive_list_entry_t *private_list_tail;
2445 uint64_t private_list_length;
2447 assert (listen_sockets_num > 0);
2449 private_list_head = NULL;
2450 private_list_tail = NULL;
2451 private_list_length = 0;
2453 while (listen_loop == 0)
2454 {
2455 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2456 if (status <= 0)
2457 {
2458 char errbuf[1024];
2459 if (errno == EINTR)
2460 continue;
2461 ERROR ("network plugin: poll(2) failed: %s",
2462 sstrerror (errno, errbuf, sizeof (errbuf)));
2463 break;
2464 }
2466 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2467 {
2468 receive_list_entry_t *ent;
2470 if ((listen_sockets_pollfd[i].revents
2471 & (POLLIN | POLLPRI)) == 0)
2472 continue;
2473 status--;
2475 buffer_len = recv (listen_sockets_pollfd[i].fd,
2476 buffer, sizeof (buffer),
2477 0 /* no flags */);
2478 if (buffer_len < 0)
2479 {
2480 char errbuf[1024];
2481 status = (errno != 0) ? errno : -1;
2482 ERROR ("network plugin: recv(2) failed: %s",
2483 sstrerror (errno, errbuf, sizeof (errbuf)));
2484 break;
2485 }
2487 stats_octets_rx += ((uint64_t) buffer_len);
2488 stats_packets_rx++;
2490 /* TODO: Possible performance enhancement: Do not free
2491 * these entries in the dispatch thread but put them in
2492 * another list, so we don't have to allocate more and
2493 * more of these structures. */
2494 ent = calloc (1, sizeof (*ent));
2495 if (ent == NULL)
2496 {
2497 ERROR ("network plugin: calloc failed.");
2498 status = ENOMEM;
2499 break;
2500 }
2502 ent->data = malloc (network_config_packet_size);
2503 if (ent->data == NULL)
2504 {
2505 sfree (ent);
2506 ERROR ("network plugin: malloc failed.");
2507 status = ENOMEM;
2508 break;
2509 }
2510 ent->fd = listen_sockets_pollfd[i].fd;
2511 ent->next = NULL;
2513 memcpy (ent->data, buffer, buffer_len);
2514 ent->data_len = buffer_len;
2516 if (private_list_head == NULL)
2517 private_list_head = ent;
2518 else
2519 private_list_tail->next = ent;
2520 private_list_tail = ent;
2521 private_list_length++;
2523 /* Do not block here. Blocking here has led to
2524 * insufficient performance in the past. */
2525 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2526 {
2527 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2528 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2530 if (receive_list_head == NULL)
2531 receive_list_head = private_list_head;
2532 else
2533 receive_list_tail->next = private_list_head;
2534 receive_list_tail = private_list_tail;
2535 receive_list_length += private_list_length;
2537 pthread_cond_signal (&receive_list_cond);
2538 pthread_mutex_unlock (&receive_list_lock);
2540 private_list_head = NULL;
2541 private_list_tail = NULL;
2542 private_list_length = 0;
2543 }
2545 status = 0;
2546 } /* for (listen_sockets_pollfd) */
2548 if (status != 0)
2549 break;
2550 } /* while (listen_loop == 0) */
2552 /* Make sure everything is dispatched before exiting. */
2553 if (private_list_head != NULL)
2554 {
2555 pthread_mutex_lock (&receive_list_lock);
2557 if (receive_list_head == NULL)
2558 receive_list_head = private_list_head;
2559 else
2560 receive_list_tail->next = private_list_head;
2561 receive_list_tail = private_list_tail;
2562 receive_list_length += private_list_length;
2564 pthread_cond_signal (&receive_list_cond);
2565 pthread_mutex_unlock (&receive_list_lock);
2566 }
2568 return (status);
2569 } /* }}} int network_receive */
2571 static void *receive_thread (void __attribute__((unused)) *arg)
2572 {
2573 return (network_receive () ? (void *) 1 : (void *) 0);
2574 } /* void *receive_thread */
2576 static void network_init_buffer (void)
2577 {
2578 memset (send_buffer, 0, network_config_packet_size);
2579 send_buffer_ptr = send_buffer;
2580 send_buffer_fill = 0;
2581 send_buffer_last_update = 0;
2583 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2584 } /* int network_init_buffer */
2586 static void network_send_buffer_plain (sockent_t *se, /* {{{ */
2587 const char *buffer, size_t buffer_size)
2588 {
2589 int status;
2591 while (42)
2592 {
2593 status = sockent_client_connect (se);
2594 if (status != 0)
2595 return;
2597 status = sendto (se->data.client.fd, buffer, buffer_size,
2598 /* flags = */ 0,
2599 (struct sockaddr *) se->data.client.addr,
2600 se->data.client.addrlen);
2601 if (status < 0)
2602 {
2603 char errbuf[1024];
2605 if ((errno == EINTR) || (errno == EAGAIN))
2606 continue;
2608 ERROR ("network plugin: sendto failed: %s. Closing sending socket.",
2609 sstrerror (errno, errbuf, sizeof (errbuf)));
2610 sockent_client_disconnect (se);
2611 return;
2612 }
2614 break;
2615 } /* while (42) */
2616 } /* }}} void network_send_buffer_plain */
2618 #if HAVE_LIBGCRYPT
2619 #define BUFFER_ADD(p,s) do { \
2620 memcpy (buffer + buffer_offset, (p), (s)); \
2621 buffer_offset += (s); \
2622 } while (0)
2624 static void network_send_buffer_signed (sockent_t *se, /* {{{ */
2625 const char *in_buffer, size_t in_buffer_size)
2626 {
2627 part_signature_sha256_t ps;
2628 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2629 size_t buffer_offset;
2630 size_t username_len;
2632 gcry_md_hd_t hd;
2633 gcry_error_t err;
2634 unsigned char *hash;
2636 hd = NULL;
2637 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2638 if (err != 0)
2639 {
2640 ERROR ("network plugin: Creating HMAC object failed: %s",
2641 gcry_strerror (err));
2642 return;
2643 }
2645 err = gcry_md_setkey (hd, se->data.client.password,
2646 strlen (se->data.client.password));
2647 if (err != 0)
2648 {
2649 ERROR ("network plugin: gcry_md_setkey failed: %s",
2650 gcry_strerror (err));
2651 gcry_md_close (hd);
2652 return;
2653 }
2655 username_len = strlen (se->data.client.username);
2656 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2657 {
2658 ERROR ("network plugin: Username too long: %s",
2659 se->data.client.username);
2660 return;
2661 }
2663 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2664 se->data.client.username, username_len);
2665 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2666 in_buffer, in_buffer_size);
2668 /* Initialize the `ps' structure. */
2669 memset (&ps, 0, sizeof (ps));
2670 ps.head.type = htons (TYPE_SIGN_SHA256);
2671 ps.head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len);
2673 /* Calculate the hash value. */
2674 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2675 username_len + in_buffer_size);
2676 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2677 if (hash == NULL)
2678 {
2679 ERROR ("network plugin: gcry_md_read failed.");
2680 gcry_md_close (hd);
2681 return;
2682 }
2683 memcpy (ps.hash, hash, sizeof (ps.hash));
2685 /* Add the header */
2686 buffer_offset = 0;
2688 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2689 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2690 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2692 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2694 gcry_md_close (hd);
2695 hd = NULL;
2697 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2698 network_send_buffer_plain (se, buffer, buffer_offset);
2699 } /* }}} void network_send_buffer_signed */
2701 static void network_send_buffer_encrypted (sockent_t *se, /* {{{ */
2702 const char *in_buffer, size_t in_buffer_size)
2703 {
2704 part_encryption_aes256_t pea;
2705 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2706 size_t buffer_size;
2707 size_t buffer_offset;
2708 size_t header_size;
2709 size_t username_len;
2710 gcry_error_t err;
2711 gcry_cipher_hd_t cypher;
2713 /* Initialize the header fields */
2714 memset (&pea, 0, sizeof (pea));
2715 pea.head.type = htons (TYPE_ENCR_AES256);
2717 pea.username = se->data.client.username;
2719 username_len = strlen (pea.username);
2720 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2721 {
2722 ERROR ("network plugin: Username too long: %s", pea.username);
2723 return;
2724 }
2726 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2727 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2728 - sizeof (pea.hash);
2730 assert (buffer_size <= sizeof (buffer));
2731 DEBUG ("network plugin: network_send_buffer_encrypted: "
2732 "buffer_size = %zu;", buffer_size);
2734 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2735 + username_len + in_buffer_size));
2736 pea.username_length = htons ((uint16_t) username_len);
2738 /* Chose a random initialization vector. */
2739 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2741 /* Create hash of the payload */
2742 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2744 /* Initialize the buffer */
2745 buffer_offset = 0;
2746 memset (buffer, 0, sizeof (buffer));
2749 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2750 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2751 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2752 BUFFER_ADD (pea.username, username_len);
2753 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2754 assert (buffer_offset == header_size);
2755 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2756 BUFFER_ADD (in_buffer, in_buffer_size);
2758 assert (buffer_offset == buffer_size);
2760 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2761 se->data.client.password);
2762 if (cypher == NULL)
2763 return;
2765 /* Encrypt the buffer in-place */
2766 err = gcry_cipher_encrypt (cypher,
2767 buffer + header_size,
2768 buffer_size - header_size,
2769 /* in = */ NULL, /* in len = */ 0);
2770 if (err != 0)
2771 {
2772 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2773 gcry_strerror (err));
2774 return;
2775 }
2777 /* Send it out without further modifications */
2778 network_send_buffer_plain (se, buffer, buffer_size);
2779 } /* }}} void network_send_buffer_encrypted */
2780 #undef BUFFER_ADD
2781 #endif /* HAVE_LIBGCRYPT */
2783 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2784 {
2785 sockent_t *se;
2787 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2789 for (se = sending_sockets; se != NULL; se = se->next)
2790 {
2791 #if HAVE_LIBGCRYPT
2792 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2793 network_send_buffer_encrypted (se, buffer, buffer_len);
2794 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2795 network_send_buffer_signed (se, buffer, buffer_len);
2796 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2797 #endif /* HAVE_LIBGCRYPT */
2798 network_send_buffer_plain (se, buffer, buffer_len);
2799 } /* for (sending_sockets) */
2800 } /* }}} void network_send_buffer */
2802 static int add_to_buffer (char *buffer, int buffer_size, /* {{{ */
2803 value_list_t *vl_def,
2804 const data_set_t *ds, const value_list_t *vl)
2805 {
2806 char *buffer_orig = buffer;
2808 if (strcmp (vl_def->host, vl->host) != 0)
2809 {
2810 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2811 vl->host, strlen (vl->host)) != 0)
2812 return (-1);
2813 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2814 }
2816 if (vl_def->time != vl->time)
2817 {
2818 if (write_part_number (&buffer, &buffer_size, TYPE_TIME_HR,
2819 (uint64_t) vl->time))
2820 return (-1);
2821 vl_def->time = vl->time;
2822 }
2824 if (vl_def->interval != vl->interval)
2825 {
2826 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL_HR,
2827 (uint64_t) vl->interval))
2828 return (-1);
2829 vl_def->interval = vl->interval;
2830 }
2832 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2833 {
2834 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2835 vl->plugin, strlen (vl->plugin)) != 0)
2836 return (-1);
2837 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2838 }
2840 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2841 {
2842 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2843 vl->plugin_instance,
2844 strlen (vl->plugin_instance)) != 0)
2845 return (-1);
2846 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2847 }
2849 if (strcmp (vl_def->type, vl->type) != 0)
2850 {
2851 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2852 vl->type, strlen (vl->type)) != 0)
2853 return (-1);
2854 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2855 }
2857 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2858 {
2859 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2860 vl->type_instance,
2861 strlen (vl->type_instance)) != 0)
2862 return (-1);
2863 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2864 }
2866 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2867 return (-1);
2869 return (buffer - buffer_orig);
2870 } /* }}} int add_to_buffer */
2872 static void flush_buffer (void)
2873 {
2874 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2875 send_buffer_fill);
2877 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2879 stats_octets_tx += ((uint64_t) send_buffer_fill);
2880 stats_packets_tx++;
2882 network_init_buffer ();
2883 }
2885 static int network_write (const data_set_t *ds, const value_list_t *vl,
2886 user_data_t __attribute__((unused)) *user_data)
2887 {
2888 int status;
2890 if (!check_send_okay (vl))
2891 {
2892 #if COLLECT_DEBUG
2893 char name[6*DATA_MAX_NAME_LEN];
2894 FORMAT_VL (name, sizeof (name), vl);
2895 name[sizeof (name) - 1] = 0;
2896 DEBUG ("network plugin: network_write: "
2897 "NOT sending %s.", name);
2898 #endif
2899 /* Counter is not protected by another lock and may be reached by
2900 * multiple threads */
2901 pthread_mutex_lock (&stats_lock);
2902 stats_values_not_sent++;
2903 pthread_mutex_unlock (&stats_lock);
2904 return (0);
2905 }
2907 uc_meta_data_add_unsigned_int (vl,
2908 "network:time_sent", (uint64_t) vl->time);
2910 pthread_mutex_lock (&send_buffer_lock);
2912 status = add_to_buffer (send_buffer_ptr,
2913 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2914 &send_buffer_vl,
2915 ds, vl);
2916 if (status >= 0)
2917 {
2918 /* status == bytes added to the buffer */
2919 send_buffer_fill += status;
2920 send_buffer_ptr += status;
2921 send_buffer_last_update = cdtime();
2923 stats_values_sent++;
2924 }
2925 else
2926 {
2927 flush_buffer ();
2929 status = add_to_buffer (send_buffer_ptr,
2930 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2931 &send_buffer_vl,
2932 ds, vl);
2934 if (status >= 0)
2935 {
2936 send_buffer_fill += status;
2937 send_buffer_ptr += status;
2939 stats_values_sent++;
2940 }
2941 }
2943 if (status < 0)
2944 {
2945 ERROR ("network plugin: Unable to append to the "
2946 "buffer for some weird reason");
2947 }
2948 else if ((network_config_packet_size - send_buffer_fill) < 15)
2949 {
2950 flush_buffer ();
2951 }
2953 pthread_mutex_unlock (&send_buffer_lock);
2955 return ((status < 0) ? -1 : 0);
2956 } /* int network_write */
2958 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2959 {
2960 int tmp = 0;
2962 if (cf_util_get_int (ci, &tmp) != 0)
2963 return (-1);
2964 else if ((tmp > 0) && (tmp <= 255))
2965 network_config_ttl = tmp;
2966 else {
2967 WARNING ("network plugin: The `TimeToLive' must be between 1 and 255.");
2968 return (-1);
2969 }
2971 return (0);
2972 } /* }}} int network_config_set_ttl */
2974 static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
2975 int *interface)
2976 {
2977 char if_name[256];
2979 if (cf_util_get_string_buffer (ci, if_name, sizeof (if_name)) != 0)
2980 return (-1);
2982 *interface = if_nametoindex (if_name);
2983 return (0);
2984 } /* }}} int network_config_set_interface */
2986 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
2987 {
2988 int tmp = 0;
2990 if (cf_util_get_int (ci, &tmp) != 0)
2991 return (-1);
2992 else if ((tmp >= 1024) && (tmp <= 65535))
2993 network_config_packet_size = tmp;
2994 else {
2995 WARNING ("network plugin: The `MaxPacketSize' must be between 1024 and 65535.");
2996 return (-1);
2997 }
2999 return (0);
3000 } /* }}} int network_config_set_buffer_size */
3002 #if HAVE_LIBGCRYPT
3003 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
3004 int *retval)
3005 {
3006 char *str;
3007 if ((ci->values_num != 1)
3008 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3009 {
3010 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
3011 "one string argument.");
3012 return (-1);
3013 }
3015 str = ci->values[0].value.string;
3016 if (strcasecmp ("Encrypt", str) == 0)
3017 *retval = SECURITY_LEVEL_ENCRYPT;
3018 else if (strcasecmp ("Sign", str) == 0)
3019 *retval = SECURITY_LEVEL_SIGN;
3020 else if (strcasecmp ("None", str) == 0)
3021 *retval = SECURITY_LEVEL_NONE;
3022 else
3023 {
3024 WARNING ("network plugin: Unknown security level: %s.", str);
3025 return (-1);
3026 }
3028 return (0);
3029 } /* }}} int network_config_set_security_level */
3030 #endif /* HAVE_LIBGCRYPT */
3032 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
3033 {
3034 sockent_t *se;
3035 int status;
3036 int i;
3038 if ((ci->values_num < 1) || (ci->values_num > 2)
3039 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3040 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3041 {
3042 ERROR ("network plugin: The `%s' config option needs "
3043 "one or two string arguments.", ci->key);
3044 return (-1);
3045 }
3047 se = sockent_create (SOCKENT_TYPE_SERVER);
3048 if (se == NULL)
3049 {
3050 ERROR ("network plugin: sockent_create failed.");
3051 return (-1);
3052 }
3054 se->node = strdup (ci->values[0].value.string);
3055 if (ci->values_num >= 2)
3056 se->service = strdup (ci->values[1].value.string);
3058 for (i = 0; i < ci->children_num; i++)
3059 {
3060 oconfig_item_t *child = ci->children + i;
3062 #if HAVE_LIBGCRYPT
3063 if (strcasecmp ("AuthFile", child->key) == 0)
3064 cf_util_get_string (child, &se->data.server.auth_file);
3065 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3066 network_config_set_security_level (child,
3067 &se->data.server.security_level);
3068 else
3069 #endif /* HAVE_LIBGCRYPT */
3070 if (strcasecmp ("Interface", child->key) == 0)
3071 network_config_set_interface (child, &se->interface);
3072 else
3073 {
3074 WARNING ("network plugin: Option `%s' is not allowed here.",
3075 child->key);
3076 }
3077 }
3079 #if HAVE_LIBGCRYPT
3080 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
3081 && (se->data.server.auth_file == NULL))
3082 {
3083 ERROR ("network plugin: A security level higher than `none' was "
3084 "requested, but no AuthFile option was given. Cowardly refusing to "
3085 "open this socket!");
3086 sockent_destroy (se);
3087 return (-1);
3088 }
3089 #endif /* HAVE_LIBGCRYPT */
3091 status = sockent_init_crypto (se);
3092 if (status != 0)
3093 {
3094 ERROR ("network plugin: network_config_add_listen: sockent_init_crypto() failed.");
3095 sockent_destroy (se);
3096 return (-1);
3097 }
3099 status = sockent_server_listen (se);
3100 if (status != 0)
3101 {
3102 ERROR ("network plugin: network_config_add_listen: sockent_server_listen failed.");
3103 sockent_destroy (se);
3104 return (-1);
3105 }
3107 status = sockent_add (se);
3108 if (status != 0)
3109 {
3110 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
3111 sockent_destroy (se);
3112 return (-1);
3113 }
3115 return (0);
3116 } /* }}} int network_config_add_listen */
3118 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
3119 {
3120 sockent_t *se;
3121 int status;
3122 int i;
3124 if ((ci->values_num < 1) || (ci->values_num > 2)
3125 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3126 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3127 {
3128 ERROR ("network plugin: The `%s' config option needs "
3129 "one or two string arguments.", ci->key);
3130 return (-1);
3131 }
3133 se = sockent_create (SOCKENT_TYPE_CLIENT);
3134 if (se == NULL)
3135 {
3136 ERROR ("network plugin: sockent_create failed.");
3137 return (-1);
3138 }
3140 se->node = strdup (ci->values[0].value.string);
3141 if (ci->values_num >= 2)
3142 se->service = strdup (ci->values[1].value.string);
3144 for (i = 0; i < ci->children_num; i++)
3145 {
3146 oconfig_item_t *child = ci->children + i;
3148 #if HAVE_LIBGCRYPT
3149 if (strcasecmp ("Username", child->key) == 0)
3150 cf_util_get_string (child, &se->data.client.username);
3151 else if (strcasecmp ("Password", child->key) == 0)
3152 cf_util_get_string (child, &se->data.client.password);
3153 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3154 network_config_set_security_level (child,
3155 &se->data.client.security_level);
3156 else
3157 #endif /* HAVE_LIBGCRYPT */
3158 if (strcasecmp ("Interface", child->key) == 0)
3159 network_config_set_interface (child, &se->interface);
3160 else if (strcasecmp ("ResolveInterval", child->key) == 0)
3161 cf_util_get_cdtime(child, &se->data.client.resolve_interval);
3162 else
3163 {
3164 WARNING ("network plugin: Option `%s' is not allowed here.",
3165 child->key);
3166 }
3167 }
3169 #if HAVE_LIBGCRYPT
3170 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
3171 && ((se->data.client.username == NULL)
3172 || (se->data.client.password == NULL)))
3173 {
3174 ERROR ("network plugin: A security level higher than `none' was "
3175 "requested, but no Username or Password option was given. "
3176 "Cowardly refusing to open this socket!");
3177 sockent_destroy (se);
3178 return (-1);
3179 }
3180 #endif /* HAVE_LIBGCRYPT */
3182 status = sockent_init_crypto (se);
3183 if (status != 0)
3184 {
3185 ERROR ("network plugin: network_config_add_server: sockent_init_crypto() failed.");
3186 sockent_destroy (se);
3187 return (-1);
3188 }
3190 /* No call to sockent_client_connect() here -- it is called from
3191 * network_send_buffer_plain(). */
3193 status = sockent_add (se);
3194 if (status != 0)
3195 {
3196 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
3197 sockent_destroy (se);
3198 return (-1);
3199 }
3201 return (0);
3202 } /* }}} int network_config_add_server */
3204 static int network_config (oconfig_item_t *ci) /* {{{ */
3205 {
3206 int i;
3208 /* The options need to be applied first */
3209 for (i = 0; i < ci->children_num; i++)
3210 {
3211 oconfig_item_t *child = ci->children + i;
3212 if (strcasecmp ("TimeToLive", child->key) == 0)
3213 network_config_set_ttl (child);
3214 }
3216 for (i = 0; i < ci->children_num; i++)
3217 {
3218 oconfig_item_t *child = ci->children + i;
3220 if (strcasecmp ("Listen", child->key) == 0)
3221 network_config_add_listen (child);
3222 else if (strcasecmp ("Server", child->key) == 0)
3223 network_config_add_server (child);
3224 else if (strcasecmp ("TimeToLive", child->key) == 0) {
3225 /* Handled earlier */
3226 }
3227 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
3228 network_config_set_buffer_size (child);
3229 else if (strcasecmp ("Forward", child->key) == 0)
3230 cf_util_get_boolean (child, &network_config_forward);
3231 else if (strcasecmp ("ReportStats", child->key) == 0)
3232 cf_util_get_boolean (child, &network_config_stats);
3233 else
3234 {
3235 WARNING ("network plugin: Option `%s' is not allowed here.",
3236 child->key);
3237 }
3238 }
3240 return (0);
3241 } /* }}} int network_config */
3243 static int network_notification (const notification_t *n,
3244 user_data_t __attribute__((unused)) *user_data)
3245 {
3246 char buffer[network_config_packet_size];
3247 char *buffer_ptr = buffer;
3248 int buffer_free = sizeof (buffer);
3249 int status;
3251 if (!check_send_notify_okay (n))
3252 return (0);
3254 memset (buffer, 0, sizeof (buffer));
3256 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME_HR,
3257 (uint64_t) n->time);
3258 if (status != 0)
3259 return (-1);
3261 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
3262 (uint64_t) n->severity);
3263 if (status != 0)
3264 return (-1);
3266 if (strlen (n->host) > 0)
3267 {
3268 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
3269 n->host, strlen (n->host));
3270 if (status != 0)
3271 return (-1);
3272 }
3274 if (strlen (n->plugin) > 0)
3275 {
3276 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
3277 n->plugin, strlen (n->plugin));
3278 if (status != 0)
3279 return (-1);
3280 }
3282 if (strlen (n->plugin_instance) > 0)
3283 {
3284 status = write_part_string (&buffer_ptr, &buffer_free,
3285 TYPE_PLUGIN_INSTANCE,
3286 n->plugin_instance, strlen (n->plugin_instance));
3287 if (status != 0)
3288 return (-1);
3289 }
3291 if (strlen (n->type) > 0)
3292 {
3293 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3294 n->type, strlen (n->type));
3295 if (status != 0)
3296 return (-1);
3297 }
3299 if (strlen (n->type_instance) > 0)
3300 {
3301 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3302 n->type_instance, strlen (n->type_instance));
3303 if (status != 0)
3304 return (-1);
3305 }
3307 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3308 n->message, strlen (n->message));
3309 if (status != 0)
3310 return (-1);
3312 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3314 return (0);
3315 } /* int network_notification */
3317 static int network_shutdown (void)
3318 {
3319 sockent_t *se;
3321 listen_loop++;
3323 /* Kill the listening thread */
3324 if (receive_thread_running != 0)
3325 {
3326 INFO ("network plugin: Stopping receive thread.");
3327 pthread_kill (receive_thread_id, SIGTERM);
3328 pthread_join (receive_thread_id, NULL /* no return value */);
3329 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3330 receive_thread_running = 0;
3331 }
3333 /* Shutdown the dispatching thread */
3334 if (dispatch_thread_running != 0)
3335 {
3336 INFO ("network plugin: Stopping dispatch thread.");
3337 pthread_mutex_lock (&receive_list_lock);
3338 pthread_cond_broadcast (&receive_list_cond);
3339 pthread_mutex_unlock (&receive_list_lock);
3340 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3341 dispatch_thread_running = 0;
3342 }
3344 sockent_destroy (listen_sockets);
3346 if (send_buffer_fill > 0)
3347 flush_buffer ();
3349 sfree (send_buffer);
3351 for (se = sending_sockets; se != NULL; se = se->next)
3352 sockent_client_disconnect (se);
3353 sockent_destroy (sending_sockets);
3355 plugin_unregister_config ("network");
3356 plugin_unregister_init ("network");
3357 plugin_unregister_write ("network");
3358 plugin_unregister_shutdown ("network");
3360 return (0);
3361 } /* int network_shutdown */
3363 static int network_stats_read (void) /* {{{ */
3364 {
3365 derive_t copy_octets_rx;
3366 derive_t copy_octets_tx;
3367 derive_t copy_packets_rx;
3368 derive_t copy_packets_tx;
3369 derive_t copy_values_dispatched;
3370 derive_t copy_values_not_dispatched;
3371 derive_t copy_values_sent;
3372 derive_t copy_values_not_sent;
3373 derive_t copy_receive_list_length;
3374 value_list_t vl = VALUE_LIST_INIT;
3375 value_t values[2];
3377 copy_octets_rx = stats_octets_rx;
3378 copy_octets_tx = stats_octets_tx;
3379 copy_packets_rx = stats_packets_rx;
3380 copy_packets_tx = stats_packets_tx;
3381 copy_values_dispatched = stats_values_dispatched;
3382 copy_values_not_dispatched = stats_values_not_dispatched;
3383 copy_values_sent = stats_values_sent;
3384 copy_values_not_sent = stats_values_not_sent;
3385 copy_receive_list_length = receive_list_length;
3387 /* Initialize `vl' */
3388 vl.values = values;
3389 vl.values_len = 2;
3390 vl.time = 0;
3391 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3392 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3394 /* Octets received / sent */
3395 vl.values[0].derive = (derive_t) copy_octets_rx;
3396 vl.values[1].derive = (derive_t) copy_octets_tx;
3397 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3398 plugin_dispatch_values (&vl);
3400 /* Packets received / send */
3401 vl.values[0].derive = (derive_t) copy_packets_rx;
3402 vl.values[1].derive = (derive_t) copy_packets_tx;
3403 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3404 plugin_dispatch_values (&vl);
3406 /* Values (not) dispatched and (not) send */
3407 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3408 vl.values_len = 1;
3410 vl.values[0].derive = (derive_t) copy_values_dispatched;
3411 sstrncpy (vl.type_instance, "dispatch-accepted",
3412 sizeof (vl.type_instance));
3413 plugin_dispatch_values (&vl);
3415 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3416 sstrncpy (vl.type_instance, "dispatch-rejected",
3417 sizeof (vl.type_instance));
3418 plugin_dispatch_values (&vl);
3420 vl.values[0].derive = (derive_t) copy_values_sent;
3421 sstrncpy (vl.type_instance, "send-accepted",
3422 sizeof (vl.type_instance));
3423 plugin_dispatch_values (&vl);
3425 vl.values[0].derive = (derive_t) copy_values_not_sent;
3426 sstrncpy (vl.type_instance, "send-rejected",
3427 sizeof (vl.type_instance));
3428 plugin_dispatch_values (&vl);
3430 /* Receive queue length */
3431 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3432 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3433 vl.type_instance[0] = 0;
3434 plugin_dispatch_values (&vl);
3436 return (0);
3437 } /* }}} int network_stats_read */
3439 static int network_init (void)
3440 {
3441 static _Bool have_init = 0;
3443 /* Check if we were already initialized. If so, just return - there's
3444 * nothing more to do (for now, that is). */
3445 if (have_init)
3446 return (0);
3447 have_init = 1;
3449 #if HAVE_LIBGCRYPT
3450 network_init_gcrypt ();
3451 #endif
3453 if (network_config_stats)
3454 plugin_register_read ("network", network_stats_read);
3456 plugin_register_shutdown ("network", network_shutdown);
3458 send_buffer = malloc (network_config_packet_size);
3459 if (send_buffer == NULL)
3460 {
3461 ERROR ("network plugin: malloc failed.");
3462 return (-1);
3463 }
3464 network_init_buffer ();
3466 /* setup socket(s) and so on */
3467 if (sending_sockets != NULL)
3468 {
3469 plugin_register_write ("network", network_write,
3470 /* user_data = */ NULL);
3471 plugin_register_notification ("network", network_notification,
3472 /* user_data = */ NULL);
3473 }
3475 /* If no threads need to be started, return here. */
3476 if ((listen_sockets_num == 0)
3477 || ((dispatch_thread_running != 0)
3478 && (receive_thread_running != 0)))
3479 return (0);
3481 if (dispatch_thread_running == 0)
3482 {
3483 int status;
3484 status = plugin_thread_create (&dispatch_thread_id,
3485 NULL /* no attributes */,
3486 dispatch_thread,
3487 NULL /* no argument */);
3488 if (status != 0)
3489 {
3490 char errbuf[1024];
3491 ERROR ("network: pthread_create failed: %s",
3492 sstrerror (errno, errbuf,
3493 sizeof (errbuf)));
3494 }
3495 else
3496 {
3497 dispatch_thread_running = 1;
3498 }
3499 }
3501 if (receive_thread_running == 0)
3502 {
3503 int status;
3504 status = plugin_thread_create (&receive_thread_id,
3505 NULL /* no attributes */,
3506 receive_thread,
3507 NULL /* no argument */);
3508 if (status != 0)
3509 {
3510 char errbuf[1024];
3511 ERROR ("network: pthread_create failed: %s",
3512 sstrerror (errno, errbuf,
3513 sizeof (errbuf)));
3514 }
3515 else
3516 {
3517 receive_thread_running = 1;
3518 }
3519 }
3521 return (0);
3522 } /* int network_init */
3524 /*
3525 * The flush option of the network plugin cannot flush individual identifiers.
3526 * All the values are added to a buffer and sent when the buffer is full, the
3527 * requested value may or may not be in there, it's not worth finding out. We
3528 * just send the buffer if `flush' is called - if the requested value was in
3529 * there, good. If not, well, then there is nothing to flush.. -octo
3530 */
3531 static int network_flush (cdtime_t timeout,
3532 __attribute__((unused)) const char *identifier,
3533 __attribute__((unused)) user_data_t *user_data)
3534 {
3535 pthread_mutex_lock (&send_buffer_lock);
3537 if (send_buffer_fill > 0)
3538 {
3539 if (timeout > 0)
3540 {
3541 cdtime_t now = cdtime ();
3542 if ((send_buffer_last_update + timeout) > now)
3543 {
3544 pthread_mutex_unlock (&send_buffer_lock);
3545 return (0);
3546 }
3547 }
3548 flush_buffer ();
3549 }
3550 pthread_mutex_unlock (&send_buffer_lock);
3552 return (0);
3553 } /* int network_flush */
3555 void module_register (void)
3556 {
3557 plugin_register_complex_config ("network", network_config);
3558 plugin_register_init ("network", network_init);
3559 plugin_register_flush ("network", network_flush,
3560 /* user_data = */ NULL);
3561 } /* void module_register */
3563 /* vim: set fdm=marker : */