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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_avltree.h"
34 #include "utils_cache.h"
35 #include "utils_complain.h"
37 #include "network.h"
39 #if HAVE_PTHREAD_H
40 # include <pthread.h>
41 #endif
42 #if HAVE_NETDB_H
43 # include <netdb.h>
44 #endif
45 #if HAVE_NETINET_IN_H
46 # include <netinet/in.h>
47 #endif
48 #if HAVE_ARPA_INET_H
49 # include <arpa/inet.h>
50 #endif
51 #if HAVE_POLL_H
52 # include <poll.h>
53 #endif
54 #if HAVE_NET_IF_H
55 # include <net/if.h>
56 #endif
58 #if HAVE_LIBGCRYPT
59 # include <pthread.h>
60 # if defined __APPLE__
61 /* default xcode compiler throws warnings even when deprecated functionality
62 * is not used. -Werror breaks the build because of erroneous warnings.
63 * http://stackoverflow.com/questions/10556299/compiler-warnings-with-libgcrypt-v1-5-0/12830209#12830209
64 */
65 # pragma GCC diagnostic ignored "-Wdeprecated-declarations"
66 # endif
67 /* FreeBSD's copy of libgcrypt extends the existing GCRYPT_NO_DEPRECATED
68 * to properly hide all deprecated functionality.
69 * http://svnweb.freebsd.org/ports/head/security/libgcrypt/files/patch-src__gcrypt.h.in
70 */
71 # define GCRYPT_NO_DEPRECATED
72 # include <gcrypt.h>
73 # if defined __APPLE__
74 /* Re enable deprecation warnings */
75 # pragma GCC diagnostic warning "-Wdeprecated-declarations"
76 # endif
77 # if GCRYPT_VERSION_NUMBER < 0x010600
78 GCRY_THREAD_OPTION_PTHREAD_IMPL;
79 # endif
80 #endif
82 #ifndef IPV6_ADD_MEMBERSHIP
83 # ifdef IPV6_JOIN_GROUP
84 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
85 # else
86 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
87 # endif
88 #endif /* !IP_ADD_MEMBERSHIP */
90 /*
91 * Maximum size required for encryption / signing:
92 *
93 * 42 bytes for the encryption header
94 * + 64 bytes for the username
95 * -----------
96 * = 106 bytes
97 */
98 #define BUFF_SIG_SIZE 106
100 /*
101 * Private data types
102 */
103 #define SECURITY_LEVEL_NONE 0
104 #if HAVE_LIBGCRYPT
105 # define SECURITY_LEVEL_SIGN 1
106 # define SECURITY_LEVEL_ENCRYPT 2
107 #endif
108 struct sockent_client
109 {
110 int fd;
111 struct sockaddr_storage *addr;
112 socklen_t addrlen;
113 #if HAVE_LIBGCRYPT
114 int security_level;
115 char *username;
116 char *password;
117 gcry_cipher_hd_t cypher;
118 unsigned char password_hash[32];
119 #endif
120 cdtime_t next_resolve_reconnect;
121 cdtime_t resolve_interval;
122 };
124 struct sockent_server
125 {
126 int *fd;
127 size_t fd_num;
128 #if HAVE_LIBGCRYPT
129 int security_level;
130 char *auth_file;
131 fbhash_t *userdb;
132 gcry_cipher_hd_t cypher;
133 #endif
134 };
136 typedef struct sockent
137 {
138 #define SOCKENT_TYPE_CLIENT 1
139 #define SOCKENT_TYPE_SERVER 2
140 int type;
142 char *node;
143 char *service;
144 int interface;
146 union
147 {
148 struct sockent_client client;
149 struct sockent_server server;
150 } data;
152 struct sockent *next;
153 } sockent_t;
155 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
156 * 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
157 * +-------+-----------------------+-------------------------------+
158 * ! Ver. ! ! Length !
159 * +-------+-----------------------+-------------------------------+
160 */
161 struct part_header_s
162 {
163 uint16_t type;
164 uint16_t length;
165 };
166 typedef struct part_header_s part_header_t;
168 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
169 * 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
170 * +-------------------------------+-------------------------------+
171 * ! Type ! Length !
172 * +-------------------------------+-------------------------------+
173 * : (Length - 4) Bytes :
174 * +---------------------------------------------------------------+
175 */
176 struct part_string_s
177 {
178 part_header_t *head;
179 char *value;
180 };
181 typedef struct part_string_s part_string_t;
183 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
184 * 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
185 * +-------------------------------+-------------------------------+
186 * ! Type ! Length !
187 * +-------------------------------+-------------------------------+
188 * : (Length - 4 == 2 || 4 || 8) Bytes :
189 * +---------------------------------------------------------------+
190 */
191 struct part_number_s
192 {
193 part_header_t *head;
194 uint64_t *value;
195 };
196 typedef struct part_number_s part_number_t;
198 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
199 * 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
200 * +-------------------------------+-------------------------------+
201 * ! Type ! Length !
202 * +-------------------------------+---------------+---------------+
203 * ! Num of values ! Type0 ! Type1 !
204 * +-------------------------------+---------------+---------------+
205 * ! Value0 !
206 * ! !
207 * +---------------------------------------------------------------+
208 * ! Value1 !
209 * ! !
210 * +---------------------------------------------------------------+
211 */
212 struct part_values_s
213 {
214 part_header_t *head;
215 uint16_t *num_values;
216 uint8_t *values_types;
217 value_t *values;
218 };
219 typedef struct part_values_s part_values_t;
221 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
222 * 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
223 * +-------------------------------+-------------------------------+
224 * ! Type ! Length !
225 * +-------------------------------+-------------------------------+
226 * ! Hash (Bits 0 - 31) !
227 * : : :
228 * ! Hash (Bits 224 - 255) !
229 * +---------------------------------------------------------------+
230 */
231 /* Minimum size */
232 #define PART_SIGNATURE_SHA256_SIZE 36
233 struct part_signature_sha256_s
234 {
235 part_header_t head;
236 unsigned char hash[32];
237 char *username;
238 };
239 typedef struct part_signature_sha256_s part_signature_sha256_t;
241 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
242 * 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
243 * +-------------------------------+-------------------------------+
244 * ! Type ! Length !
245 * +-------------------------------+-------------------------------+
246 * ! Original length ! Padding (0 - 15 bytes) !
247 * +-------------------------------+-------------------------------+
248 * ! Hash (Bits 0 - 31) !
249 * : : :
250 * ! Hash (Bits 128 - 159) !
251 * +---------------------------------------------------------------+
252 */
253 /* Minimum size */
254 #define PART_ENCRYPTION_AES256_SIZE 42
255 struct part_encryption_aes256_s
256 {
257 part_header_t head;
258 uint16_t username_length;
259 char *username;
260 unsigned char iv[16];
261 /* <encrypted> */
262 unsigned char hash[20];
263 /* <payload /> */
264 /* </encrypted> */
265 };
266 typedef struct part_encryption_aes256_s part_encryption_aes256_t;
268 struct receive_list_entry_s
269 {
270 char *data;
271 int data_len;
272 int fd;
273 struct receive_list_entry_s *next;
274 };
275 typedef struct receive_list_entry_s receive_list_entry_t;
277 /*
278 * Private variables
279 */
280 static int network_config_ttl = 0;
281 /* Ethernet - (IPv6 + UDP) = 1500 - (40 + 8) = 1452 */
282 static size_t network_config_packet_size = 1452;
283 static _Bool network_config_forward = 0;
284 static _Bool network_config_stats = 0;
286 static sockent_t *sending_sockets = NULL;
288 static receive_list_entry_t *receive_list_head = NULL;
289 static receive_list_entry_t *receive_list_tail = NULL;
290 static pthread_mutex_t receive_list_lock = PTHREAD_MUTEX_INITIALIZER;
291 static pthread_cond_t receive_list_cond = PTHREAD_COND_INITIALIZER;
292 static uint64_t receive_list_length = 0;
294 static sockent_t *listen_sockets = NULL;
295 static struct pollfd *listen_sockets_pollfd = NULL;
296 static size_t listen_sockets_num = 0;
298 /* The receive and dispatch threads will run as long as `listen_loop' is set to
299 * zero. */
300 static int listen_loop = 0;
301 static int receive_thread_running = 0;
302 static pthread_t receive_thread_id;
303 static int dispatch_thread_running = 0;
304 static pthread_t dispatch_thread_id;
306 /* Buffer in which to-be-sent network packets are constructed. */
307 static char *send_buffer;
308 static char *send_buffer_ptr;
309 static int send_buffer_fill;
310 static cdtime_t send_buffer_last_update;
311 static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
312 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
314 /* XXX: These counters are incremented from one place only. The spot in which
315 * the values are incremented is either only reachable by one thread (the
316 * dispatch thread, for example) or locked by some lock (send_buffer_lock for
317 * example). Only if neither is true, the stats_lock is acquired. The counters
318 * are always read without holding a lock in the hope that writing 8 bytes to
319 * memory is an atomic operation. */
320 static derive_t stats_octets_rx = 0;
321 static derive_t stats_octets_tx = 0;
322 static derive_t stats_packets_rx = 0;
323 static derive_t stats_packets_tx = 0;
324 static derive_t stats_values_dispatched = 0;
325 static derive_t stats_values_not_dispatched = 0;
326 static derive_t stats_values_sent = 0;
327 static derive_t stats_values_not_sent = 0;
328 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
330 /*
331 * Private functions
332 */
333 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
334 {
335 uint64_t time_sent = 0;
336 int status;
338 status = uc_meta_data_get_unsigned_int (vl,
339 "network:time_sent", &time_sent);
341 /* This is a value we already sent. Don't allow it to be received again in
342 * order to avoid looping. */
343 if ((status == 0) && (time_sent >= ((uint64_t) vl->time)))
344 return (0);
346 return (1);
347 } /* }}} _Bool check_receive_okay */
349 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
350 {
351 _Bool received = 0;
352 int status;
354 if (network_config_forward)
355 return (1);
357 if (vl->meta == NULL)
358 return (1);
360 status = meta_data_get_boolean (vl->meta, "network:received", &received);
361 if (status == -ENOENT)
362 return (1);
363 else if (status != 0)
364 {
365 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
366 "with status %i.", status);
367 return (1);
368 }
370 /* By default, only *send* value lists that were not *received* by the
371 * network plugin. */
372 return (!received);
373 } /* }}} _Bool check_send_okay */
375 static _Bool check_notify_received (const notification_t *n) /* {{{ */
376 {
377 notification_meta_t *ptr;
379 for (ptr = n->meta; ptr != NULL; ptr = ptr->next)
380 if ((strcmp ("network:received", ptr->name) == 0)
381 && (ptr->type == NM_TYPE_BOOLEAN))
382 return ((_Bool) ptr->nm_value.nm_boolean);
384 return (0);
385 } /* }}} _Bool check_notify_received */
387 static _Bool check_send_notify_okay (const notification_t *n) /* {{{ */
388 {
389 static c_complain_t complain_forwarding = C_COMPLAIN_INIT_STATIC;
390 _Bool received = 0;
392 if (n->meta == NULL)
393 return (1);
395 received = check_notify_received (n);
397 if (network_config_forward && received)
398 {
399 c_complain_once (LOG_ERR, &complain_forwarding,
400 "network plugin: A notification has been received via the network "
401 "and forwarding is enabled. Forwarding of notifications is currently "
402 "not supported, because there is not loop-deteciton available. "
403 "Please contact the collectd mailing list if you need this "
404 "feature.");
405 }
407 /* By default, only *send* value lists that were not *received* by the
408 * network plugin. */
409 return (!received);
410 } /* }}} _Bool check_send_notify_okay */
412 static int network_dispatch_values (value_list_t *vl, /* {{{ */
413 const char *username)
414 {
415 int status;
417 if ((vl->time <= 0)
418 || (strlen (vl->host) <= 0)
419 || (strlen (vl->plugin) <= 0)
420 || (strlen (vl->type) <= 0))
421 return (-EINVAL);
423 if (!check_receive_okay (vl))
424 {
425 #if COLLECT_DEBUG
426 char name[6*DATA_MAX_NAME_LEN];
427 FORMAT_VL (name, sizeof (name), vl);
428 name[sizeof (name) - 1] = 0;
429 DEBUG ("network plugin: network_dispatch_values: "
430 "NOT dispatching %s.", name);
431 #endif
432 stats_values_not_dispatched++;
433 return (0);
434 }
436 assert (vl->meta == NULL);
438 vl->meta = meta_data_create ();
439 if (vl->meta == NULL)
440 {
441 ERROR ("network plugin: meta_data_create failed.");
442 return (-ENOMEM);
443 }
445 status = meta_data_add_boolean (vl->meta, "network:received", 1);
446 if (status != 0)
447 {
448 ERROR ("network plugin: meta_data_add_boolean failed.");
449 meta_data_destroy (vl->meta);
450 vl->meta = NULL;
451 return (status);
452 }
454 if (username != NULL)
455 {
456 status = meta_data_add_string (vl->meta, "network:username", username);
457 if (status != 0)
458 {
459 ERROR ("network plugin: meta_data_add_string failed.");
460 meta_data_destroy (vl->meta);
461 vl->meta = NULL;
462 return (status);
463 }
464 }
466 plugin_dispatch_values (vl);
467 stats_values_dispatched++;
469 meta_data_destroy (vl->meta);
470 vl->meta = NULL;
472 return (0);
473 } /* }}} int network_dispatch_values */
475 static int network_dispatch_notification (notification_t *n) /* {{{ */
476 {
477 int status;
479 assert (n->meta == NULL);
481 status = plugin_notification_meta_add_boolean (n, "network:received", 1);
482 if (status != 0)
483 {
484 ERROR ("network plugin: plugin_notification_meta_add_boolean failed.");
485 plugin_notification_meta_free (n->meta);
486 n->meta = NULL;
487 return (status);
488 }
490 status = plugin_dispatch_notification (n);
492 plugin_notification_meta_free (n->meta);
493 n->meta = NULL;
495 return (status);
496 } /* }}} int network_dispatch_notification */
498 #if HAVE_LIBGCRYPT
499 static void network_init_gcrypt (void) /* {{{ */
500 {
501 /* http://lists.gnupg.org/pipermail/gcrypt-devel/2003-August/000458.html
502 * Because you can't know in a library whether another library has
503 * already initialized the library */
504 if (gcry_control (GCRYCTL_ANY_INITIALIZATION_P))
505 return;
507 /* http://www.gnupg.org/documentation/manuals/gcrypt/Multi_002dThreading.html
508 * To ensure thread-safety, it's important to set GCRYCTL_SET_THREAD_CBS
509 * *before* initalizing Libgcrypt with gcry_check_version(), which itself must
510 * be called before any other gcry_* function. GCRYCTL_ANY_INITIALIZATION_P
511 * above doesn't count, as it doesn't implicitly initalize Libgcrypt.
512 *
513 * tl;dr: keep all these gry_* statements in this exact order please. */
514 # if GCRYPT_VERSION_NUMBER < 0x010600
515 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
516 # endif
517 gcry_check_version (NULL);
518 gcry_control (GCRYCTL_INIT_SECMEM, 32768);
519 gcry_control (GCRYCTL_INITIALIZATION_FINISHED);
520 } /* }}} void network_init_gcrypt */
522 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
523 const void *iv, size_t iv_size, const char *username)
524 {
525 gcry_error_t err;
526 gcry_cipher_hd_t *cyper_ptr;
527 unsigned char password_hash[32];
529 if (se->type == SOCKENT_TYPE_CLIENT)
530 {
531 cyper_ptr = &se->data.client.cypher;
532 memcpy (password_hash, se->data.client.password_hash,
533 sizeof (password_hash));
534 }
535 else
536 {
537 char *secret;
539 cyper_ptr = &se->data.server.cypher;
541 if (username == NULL)
542 return (NULL);
544 secret = fbh_get (se->data.server.userdb, username);
545 if (secret == NULL)
546 return (NULL);
548 gcry_md_hash_buffer (GCRY_MD_SHA256,
549 password_hash,
550 secret, strlen (secret));
552 sfree (secret);
553 }
555 if (*cyper_ptr == NULL)
556 {
557 err = gcry_cipher_open (cyper_ptr,
558 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
559 if (err != 0)
560 {
561 ERROR ("network plugin: gcry_cipher_open returned: %s",
562 gcry_strerror (err));
563 *cyper_ptr = NULL;
564 return (NULL);
565 }
566 }
567 else
568 {
569 gcry_cipher_reset (*cyper_ptr);
570 }
571 assert (*cyper_ptr != NULL);
573 err = gcry_cipher_setkey (*cyper_ptr,
574 password_hash, sizeof (password_hash));
575 if (err != 0)
576 {
577 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
578 gcry_strerror (err));
579 gcry_cipher_close (*cyper_ptr);
580 *cyper_ptr = NULL;
581 return (NULL);
582 }
584 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
585 if (err != 0)
586 {
587 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
588 gcry_strerror (err));
589 gcry_cipher_close (*cyper_ptr);
590 *cyper_ptr = NULL;
591 return (NULL);
592 }
594 return (*cyper_ptr);
595 } /* }}} int network_get_aes256_cypher */
596 #endif /* HAVE_LIBGCRYPT */
598 static int write_part_values (char **ret_buffer, int *ret_buffer_len,
599 const data_set_t *ds, const value_list_t *vl)
600 {
601 char *packet_ptr;
602 int packet_len;
603 int num_values;
605 part_header_t pkg_ph;
606 uint16_t pkg_num_values;
607 uint8_t *pkg_values_types;
608 value_t *pkg_values;
610 int offset;
611 int i;
613 num_values = vl->values_len;
614 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
615 + (num_values * sizeof (uint8_t))
616 + (num_values * sizeof (value_t));
618 if (*ret_buffer_len < packet_len)
619 return (-1);
621 pkg_values_types = malloc (num_values * sizeof (*pkg_values_types));
622 if (pkg_values_types == NULL)
623 {
624 ERROR ("network plugin: write_part_values: malloc failed.");
625 return (-1);
626 }
628 pkg_values = malloc (num_values * sizeof (*pkg_values));
629 if (pkg_values == NULL)
630 {
631 free (pkg_values_types);
632 ERROR ("network plugin: write_part_values: malloc failed.");
633 return (-1);
634 }
636 pkg_ph.type = htons (TYPE_VALUES);
637 pkg_ph.length = htons (packet_len);
639 pkg_num_values = htons ((uint16_t) vl->values_len);
641 for (i = 0; i < num_values; i++)
642 {
643 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
644 switch (ds->ds[i].type)
645 {
646 case DS_TYPE_COUNTER:
647 pkg_values[i].counter = htonll (vl->values[i].counter);
648 break;
650 case DS_TYPE_GAUGE:
651 pkg_values[i].gauge = htond (vl->values[i].gauge);
652 break;
654 case DS_TYPE_DERIVE:
655 pkg_values[i].derive = htonll (vl->values[i].derive);
656 break;
658 case DS_TYPE_ABSOLUTE:
659 pkg_values[i].absolute = htonll (vl->values[i].absolute);
660 break;
662 default:
663 free (pkg_values_types);
664 free (pkg_values);
665 ERROR ("network plugin: write_part_values: "
666 "Unknown data source type: %i",
667 ds->ds[i].type);
668 return (-1);
669 } /* switch (ds->ds[i].type) */
670 } /* for (num_values) */
672 /*
673 * Use `memcpy' to write everything to the buffer, because the pointer
674 * may be unaligned and some architectures, such as SPARC, can't handle
675 * that.
676 */
677 packet_ptr = *ret_buffer;
678 offset = 0;
679 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
680 offset += sizeof (pkg_ph);
681 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
682 offset += sizeof (pkg_num_values);
683 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
684 offset += num_values * sizeof (uint8_t);
685 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
686 offset += num_values * sizeof (value_t);
688 assert (offset == packet_len);
690 *ret_buffer = packet_ptr + packet_len;
691 *ret_buffer_len -= packet_len;
693 free (pkg_values_types);
694 free (pkg_values);
696 return (0);
697 } /* int write_part_values */
699 static int write_part_number (char **ret_buffer, int *ret_buffer_len,
700 int type, uint64_t value)
701 {
702 char *packet_ptr;
703 int packet_len;
705 part_header_t pkg_head;
706 uint64_t pkg_value;
708 int offset;
710 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
712 if (*ret_buffer_len < packet_len)
713 return (-1);
715 pkg_head.type = htons (type);
716 pkg_head.length = htons (packet_len);
717 pkg_value = htonll (value);
719 packet_ptr = *ret_buffer;
720 offset = 0;
721 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
722 offset += sizeof (pkg_head);
723 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
724 offset += sizeof (pkg_value);
726 assert (offset == packet_len);
728 *ret_buffer = packet_ptr + packet_len;
729 *ret_buffer_len -= packet_len;
731 return (0);
732 } /* int write_part_number */
734 static int write_part_string (char **ret_buffer, int *ret_buffer_len,
735 int type, const char *str, int str_len)
736 {
737 char *buffer;
738 int buffer_len;
740 uint16_t pkg_type;
741 uint16_t pkg_length;
743 int offset;
745 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
746 if (*ret_buffer_len < buffer_len)
747 return (-1);
749 pkg_type = htons (type);
750 pkg_length = htons (buffer_len);
752 buffer = *ret_buffer;
753 offset = 0;
754 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
755 offset += sizeof (pkg_type);
756 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
757 offset += sizeof (pkg_length);
758 memcpy (buffer + offset, str, str_len);
759 offset += str_len;
760 memset (buffer + offset, '\0', 1);
761 offset += 1;
763 assert (offset == buffer_len);
765 *ret_buffer = buffer + buffer_len;
766 *ret_buffer_len -= buffer_len;
768 return (0);
769 } /* int write_part_string */
771 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
772 value_t **ret_values, size_t *ret_num_values)
773 {
774 char *buffer = *ret_buffer;
775 size_t buffer_len = *ret_buffer_len;
777 uint16_t tmp16;
778 size_t exp_size;
779 size_t i;
781 uint16_t pkg_length;
782 uint16_t pkg_type;
783 size_t pkg_numval;
785 uint8_t *pkg_types;
786 value_t *pkg_values;
788 if (buffer_len < 15)
789 {
790 NOTICE ("network plugin: packet is too short: "
791 "buffer_len = %zu", buffer_len);
792 return (-1);
793 }
795 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
796 buffer += sizeof (tmp16);
797 pkg_type = ntohs (tmp16);
799 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
800 buffer += sizeof (tmp16);
801 pkg_length = ntohs (tmp16);
803 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
804 buffer += sizeof (tmp16);
805 pkg_numval = (size_t) ntohs (tmp16);
807 assert (pkg_type == TYPE_VALUES);
809 exp_size = 3 * sizeof (uint16_t)
810 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
811 if (buffer_len < exp_size)
812 {
813 WARNING ("network plugin: parse_part_values: "
814 "Packet too short: "
815 "Chunk of size %zu expected, "
816 "but buffer has only %zu bytes left.",
817 exp_size, buffer_len);
818 return (-1);
819 }
820 assert (pkg_numval <= ((buffer_len - 6) / 9));
822 if (pkg_length != exp_size)
823 {
824 WARNING ("network plugin: parse_part_values: "
825 "Length and number of values "
826 "in the packet don't match.");
827 return (-1);
828 }
830 pkg_types = calloc (pkg_numval, sizeof (*pkg_types));
831 pkg_values = calloc (pkg_numval, sizeof (*pkg_values));
832 if ((pkg_types == NULL) || (pkg_values == NULL))
833 {
834 sfree (pkg_types);
835 sfree (pkg_values);
836 ERROR ("network plugin: parse_part_values: calloc failed.");
837 return (-1);
838 }
840 memcpy (pkg_types, buffer, pkg_numval * sizeof (*pkg_types));
841 buffer += pkg_numval * sizeof (*pkg_types);
842 memcpy (pkg_values, buffer, pkg_numval * sizeof (*pkg_values));
843 buffer += pkg_numval * sizeof (*pkg_values);
845 for (i = 0; i < pkg_numval; i++)
846 {
847 switch (pkg_types[i])
848 {
849 case DS_TYPE_COUNTER:
850 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
851 break;
853 case DS_TYPE_GAUGE:
854 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
855 break;
857 case DS_TYPE_DERIVE:
858 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
859 break;
861 case DS_TYPE_ABSOLUTE:
862 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
863 break;
865 default:
866 NOTICE ("network plugin: parse_part_values: "
867 "Don't know how to handle data source type %"PRIu8,
868 pkg_types[i]);
869 sfree (pkg_types);
870 sfree (pkg_values);
871 return (-1);
872 } /* switch (pkg_types[i]) */
873 }
875 *ret_buffer = buffer;
876 *ret_buffer_len = buffer_len - pkg_length;
877 *ret_num_values = pkg_numval;
878 *ret_values = pkg_values;
880 sfree (pkg_types);
882 return (0);
883 } /* int parse_part_values */
885 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
886 uint64_t *value)
887 {
888 char *buffer = *ret_buffer;
889 size_t buffer_len = *ret_buffer_len;
891 uint16_t tmp16;
892 uint64_t tmp64;
893 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
895 uint16_t pkg_length;
897 if (buffer_len < exp_size)
898 {
899 WARNING ("network plugin: parse_part_number: "
900 "Packet too short: "
901 "Chunk of size %zu expected, "
902 "but buffer has only %zu bytes left.",
903 exp_size, buffer_len);
904 return (-1);
905 }
907 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
908 buffer += sizeof (tmp16);
909 /* pkg_type = ntohs (tmp16); */
911 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
912 buffer += sizeof (tmp16);
913 pkg_length = ntohs (tmp16);
915 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
916 buffer += sizeof (tmp64);
917 *value = ntohll (tmp64);
919 *ret_buffer = buffer;
920 *ret_buffer_len = buffer_len - pkg_length;
922 return (0);
923 } /* int parse_part_number */
925 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
926 char *output, size_t const output_len)
927 {
928 char *buffer = *ret_buffer;
929 size_t buffer_len = *ret_buffer_len;
931 uint16_t tmp16;
932 size_t const header_size = 2 * sizeof (uint16_t);
934 uint16_t pkg_length;
935 size_t payload_size;
937 if (output_len <= 0)
938 return (EINVAL);
940 if (buffer_len < header_size)
941 {
942 WARNING ("network plugin: parse_part_string: "
943 "Packet too short: "
944 "Chunk of at least size %zu expected, "
945 "but buffer has only %zu bytes left.",
946 header_size, buffer_len);
947 return (-1);
948 }
950 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
951 buffer += sizeof (tmp16);
952 /* pkg_type = ntohs (tmp16); */
954 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
955 buffer += sizeof (tmp16);
956 pkg_length = ntohs (tmp16);
957 payload_size = ((size_t) pkg_length) - header_size;
959 /* Check that packet fits in the input buffer */
960 if (pkg_length > buffer_len)
961 {
962 WARNING ("network plugin: parse_part_string: "
963 "Packet too big: "
964 "Chunk of size %"PRIu16" received, "
965 "but buffer has only %zu bytes left.",
966 pkg_length, buffer_len);
967 return (-1);
968 }
970 /* Check that pkg_length is in the valid range */
971 if (pkg_length <= header_size)
972 {
973 WARNING ("network plugin: parse_part_string: "
974 "Packet too short: "
975 "Header claims this packet is only %hu "
976 "bytes long.", pkg_length);
977 return (-1);
978 }
980 /* Check that the package data fits into the output buffer.
981 * The previous if-statement ensures that:
982 * `pkg_length > header_size' */
983 if (output_len < payload_size)
984 {
985 WARNING ("network plugin: parse_part_string: "
986 "Buffer too small: "
987 "Output buffer holds %zu bytes, "
988 "which is too small to hold the received "
989 "%zu byte string.",
990 output_len, payload_size);
991 return (-1);
992 }
994 /* All sanity checks successfull, let's copy the data over */
995 memcpy ((void *) output, (void *) buffer, payload_size);
996 buffer += payload_size;
998 /* For some very weird reason '\0' doesn't do the trick on SPARC in
999 * this statement. */
1000 if (output[payload_size - 1] != 0)
1001 {
1002 WARNING ("network plugin: parse_part_string: "
1003 "Received string does not end "
1004 "with a NULL-byte.");
1005 return (-1);
1006 }
1008 *ret_buffer = buffer;
1009 *ret_buffer_len = buffer_len - pkg_length;
1011 return (0);
1012 } /* int parse_part_string */
1014 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
1015 * parse_packet and vice versa. */
1016 #define PP_SIGNED 0x01
1017 #define PP_ENCRYPTED 0x02
1018 static int parse_packet (sockent_t *se,
1019 void *buffer, size_t buffer_size, int flags,
1020 const char *username);
1022 #define BUFFER_READ(p,s) do { \
1023 memcpy ((p), buffer + buffer_offset, (s)); \
1024 buffer_offset += (s); \
1025 } while (0)
1027 #if HAVE_LIBGCRYPT
1028 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1029 void **ret_buffer, size_t *ret_buffer_len, int flags)
1030 {
1031 static c_complain_t complain_no_users = C_COMPLAIN_INIT_STATIC;
1033 char *buffer;
1034 size_t buffer_len;
1035 size_t buffer_offset;
1037 size_t username_len;
1038 char *secret;
1040 part_signature_sha256_t pss;
1041 uint16_t pss_head_length;
1042 char hash[sizeof (pss.hash)];
1044 gcry_md_hd_t hd;
1045 gcry_error_t err;
1046 unsigned char *hash_ptr;
1048 buffer = *ret_buffer;
1049 buffer_len = *ret_buffer_len;
1050 buffer_offset = 0;
1052 if (se->data.server.userdb == NULL)
1053 {
1054 c_complain (LOG_NOTICE, &complain_no_users,
1055 "network plugin: Received signed network packet but can't verify it "
1056 "because no user DB has been configured. Will accept it.");
1057 return (0);
1058 }
1060 /* Check if the buffer has enough data for this structure. */
1061 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
1062 return (-ENOMEM);
1064 /* Read type and length header */
1065 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1066 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1067 pss_head_length = ntohs (pss.head.length);
1069 /* Check if the `pss_head_length' is within bounds. */
1070 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
1071 || (pss_head_length > buffer_len))
1072 {
1073 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
1074 return (-1);
1075 }
1077 /* Copy the hash. */
1078 BUFFER_READ (pss.hash, sizeof (pss.hash));
1080 /* Calculate username length (without null byte) and allocate memory */
1081 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
1082 pss.username = malloc (username_len + 1);
1083 if (pss.username == NULL)
1084 return (-ENOMEM);
1086 /* Read the username */
1087 BUFFER_READ (pss.username, username_len);
1088 pss.username[username_len] = 0;
1090 assert (buffer_offset == pss_head_length);
1092 /* Query the password */
1093 secret = fbh_get (se->data.server.userdb, pss.username);
1094 if (secret == NULL)
1095 {
1096 ERROR ("network plugin: Unknown user: %s", pss.username);
1097 sfree (pss.username);
1098 return (-ENOENT);
1099 }
1101 /* Create a hash device and check the HMAC */
1102 hd = NULL;
1103 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
1104 if (err != 0)
1105 {
1106 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
1107 gcry_strerror (err));
1108 sfree (secret);
1109 sfree (pss.username);
1110 return (-1);
1111 }
1113 err = gcry_md_setkey (hd, secret, strlen (secret));
1114 if (err != 0)
1115 {
1116 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
1117 gcry_md_close (hd);
1118 sfree (secret);
1119 sfree (pss.username);
1120 return (-1);
1121 }
1123 gcry_md_write (hd,
1124 buffer + PART_SIGNATURE_SHA256_SIZE,
1125 buffer_len - PART_SIGNATURE_SHA256_SIZE);
1126 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
1127 if (hash_ptr == NULL)
1128 {
1129 ERROR ("network plugin: gcry_md_read failed.");
1130 gcry_md_close (hd);
1131 sfree (secret);
1132 sfree (pss.username);
1133 return (-1);
1134 }
1135 memcpy (hash, hash_ptr, sizeof (hash));
1137 /* Clean up */
1138 gcry_md_close (hd);
1139 hd = NULL;
1141 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1142 {
1143 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1144 "Hash mismatch.");
1145 }
1146 else
1147 {
1148 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1149 flags | PP_SIGNED, pss.username);
1150 }
1152 sfree (secret);
1153 sfree (pss.username);
1155 *ret_buffer = buffer + buffer_len;
1156 *ret_buffer_len = 0;
1158 return (0);
1159 } /* }}} int parse_part_sign_sha256 */
1160 /* #endif HAVE_LIBGCRYPT */
1162 #else /* if !HAVE_LIBGCRYPT */
1163 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1164 void **ret_buffer, size_t *ret_buffer_size, int flags)
1165 {
1166 static int warning_has_been_printed = 0;
1168 char *buffer;
1169 size_t buffer_size;
1170 size_t buffer_offset;
1171 uint16_t part_len;
1173 part_signature_sha256_t pss;
1175 buffer = *ret_buffer;
1176 buffer_size = *ret_buffer_size;
1177 buffer_offset = 0;
1179 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1180 return (-ENOMEM);
1182 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1183 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1184 part_len = ntohs (pss.head.length);
1186 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1187 || (part_len > buffer_size))
1188 return (-EINVAL);
1190 if (warning_has_been_printed == 0)
1191 {
1192 WARNING ("network plugin: Received signed packet, but the network "
1193 "plugin was not linked with libgcrypt, so I cannot "
1194 "verify the signature. The packet will be accepted.");
1195 warning_has_been_printed = 1;
1196 }
1198 parse_packet (se, buffer + part_len, buffer_size - part_len, flags,
1199 /* username = */ NULL);
1201 *ret_buffer = buffer + buffer_size;
1202 *ret_buffer_size = 0;
1204 return (0);
1205 } /* }}} int parse_part_sign_sha256 */
1206 #endif /* !HAVE_LIBGCRYPT */
1208 #if HAVE_LIBGCRYPT
1209 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1210 void **ret_buffer, size_t *ret_buffer_len,
1211 int flags)
1212 {
1213 char *buffer = *ret_buffer;
1214 size_t buffer_len = *ret_buffer_len;
1215 size_t payload_len;
1216 size_t part_size;
1217 size_t buffer_offset;
1218 uint16_t username_len;
1219 part_encryption_aes256_t pea;
1220 unsigned char hash[sizeof (pea.hash)];
1222 gcry_cipher_hd_t cypher;
1223 gcry_error_t err;
1225 /* Make sure at least the header if available. */
1226 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1227 {
1228 NOTICE ("network plugin: parse_part_encr_aes256: "
1229 "Discarding short packet.");
1230 return (-1);
1231 }
1233 buffer_offset = 0;
1235 /* Copy the unencrypted information into `pea'. */
1236 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1237 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1239 /* Check the `part size'. */
1240 part_size = ntohs (pea.head.length);
1241 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1242 || (part_size > buffer_len))
1243 {
1244 NOTICE ("network plugin: parse_part_encr_aes256: "
1245 "Discarding part with invalid size.");
1246 return (-1);
1247 }
1249 /* Read the username */
1250 BUFFER_READ (&username_len, sizeof (username_len));
1251 username_len = ntohs (username_len);
1253 if ((username_len <= 0)
1254 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1255 {
1256 NOTICE ("network plugin: parse_part_encr_aes256: "
1257 "Discarding part with invalid username length.");
1258 return (-1);
1259 }
1261 assert (username_len > 0);
1262 pea.username = malloc (username_len + 1);
1263 if (pea.username == NULL)
1264 return (-ENOMEM);
1265 BUFFER_READ (pea.username, username_len);
1266 pea.username[username_len] = 0;
1268 /* Last but not least, the initialization vector */
1269 BUFFER_READ (pea.iv, sizeof (pea.iv));
1271 /* Make sure we are at the right position */
1272 assert (buffer_offset == (username_len +
1273 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1275 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1276 pea.username);
1277 if (cypher == NULL)
1278 {
1279 sfree (pea.username);
1280 return (-1);
1281 }
1283 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1284 assert (payload_len > 0);
1286 /* Decrypt the packet in-place */
1287 err = gcry_cipher_decrypt (cypher,
1288 buffer + buffer_offset,
1289 part_size - buffer_offset,
1290 /* in = */ NULL, /* in len = */ 0);
1291 if (err != 0)
1292 {
1293 sfree (pea.username);
1294 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1295 gcry_strerror (err));
1296 return (-1);
1297 }
1299 /* Read the hash */
1300 BUFFER_READ (pea.hash, sizeof (pea.hash));
1302 /* Make sure we're at the right position - again */
1303 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1304 assert (buffer_offset == (part_size - payload_len));
1306 /* Check hash sum */
1307 memset (hash, 0, sizeof (hash));
1308 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1309 buffer + buffer_offset, payload_len);
1310 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1311 {
1312 sfree (pea.username);
1313 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1314 return (-1);
1315 }
1317 parse_packet (se, buffer + buffer_offset, payload_len,
1318 flags | PP_ENCRYPTED, pea.username);
1320 /* XXX: Free pea.username?!? */
1322 /* Update return values */
1323 *ret_buffer = buffer + part_size;
1324 *ret_buffer_len = buffer_len - part_size;
1326 sfree (pea.username);
1328 return (0);
1329 } /* }}} int parse_part_encr_aes256 */
1330 /* #endif HAVE_LIBGCRYPT */
1332 #else /* if !HAVE_LIBGCRYPT */
1333 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1334 void **ret_buffer, size_t *ret_buffer_size, int flags)
1335 {
1336 static int warning_has_been_printed = 0;
1338 char *buffer;
1339 size_t buffer_size;
1340 size_t buffer_offset;
1342 part_header_t ph;
1343 size_t ph_length;
1345 buffer = *ret_buffer;
1346 buffer_size = *ret_buffer_size;
1347 buffer_offset = 0;
1349 /* parse_packet assures this minimum size. */
1350 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1352 BUFFER_READ (&ph.type, sizeof (ph.type));
1353 BUFFER_READ (&ph.length, sizeof (ph.length));
1354 ph_length = ntohs (ph.length);
1356 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1357 || (ph_length > buffer_size))
1358 {
1359 ERROR ("network plugin: AES-256 encrypted part "
1360 "with invalid length received.");
1361 return (-1);
1362 }
1364 if (warning_has_been_printed == 0)
1365 {
1366 WARNING ("network plugin: Received encrypted packet, but the network "
1367 "plugin was not linked with libgcrypt, so I cannot "
1368 "decrypt it. The part will be discarded.");
1369 warning_has_been_printed = 1;
1370 }
1372 *ret_buffer += ph_length;
1373 *ret_buffer_size -= ph_length;
1375 return (0);
1376 } /* }}} int parse_part_encr_aes256 */
1377 #endif /* !HAVE_LIBGCRYPT */
1379 #undef BUFFER_READ
1381 static int parse_packet (sockent_t *se, /* {{{ */
1382 void *buffer, size_t buffer_size, int flags,
1383 const char *username)
1384 {
1385 int status;
1387 value_list_t vl = VALUE_LIST_INIT;
1388 notification_t n;
1390 #if HAVE_LIBGCRYPT
1391 int packet_was_signed = (flags & PP_SIGNED);
1392 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1393 int printed_ignore_warning = 0;
1394 #endif /* HAVE_LIBGCRYPT */
1397 memset (&vl, '\0', sizeof (vl));
1398 memset (&n, '\0', sizeof (n));
1399 status = 0;
1401 while ((status == 0) && (0 < buffer_size)
1402 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1403 {
1404 uint16_t pkg_length;
1405 uint16_t pkg_type;
1407 memcpy ((void *) &pkg_type,
1408 (void *) buffer,
1409 sizeof (pkg_type));
1410 memcpy ((void *) &pkg_length,
1411 (void *) (buffer + sizeof (pkg_type)),
1412 sizeof (pkg_length));
1414 pkg_length = ntohs (pkg_length);
1415 pkg_type = ntohs (pkg_type);
1417 if (pkg_length > buffer_size)
1418 break;
1419 /* Ensure that this loop terminates eventually */
1420 if (pkg_length < (2 * sizeof (uint16_t)))
1421 break;
1423 if (pkg_type == TYPE_ENCR_AES256)
1424 {
1425 status = parse_part_encr_aes256 (se,
1426 &buffer, &buffer_size, flags);
1427 if (status != 0)
1428 {
1429 ERROR ("network plugin: Decrypting AES256 "
1430 "part failed "
1431 "with status %i.", status);
1432 break;
1433 }
1434 }
1435 #if HAVE_LIBGCRYPT
1436 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1437 && (packet_was_encrypted == 0))
1438 {
1439 if (printed_ignore_warning == 0)
1440 {
1441 INFO ("network plugin: Unencrypted packet or "
1442 "part has been ignored.");
1443 printed_ignore_warning = 1;
1444 }
1445 buffer = ((char *) buffer) + pkg_length;
1446 continue;
1447 }
1448 #endif /* HAVE_LIBGCRYPT */
1449 else if (pkg_type == TYPE_SIGN_SHA256)
1450 {
1451 status = parse_part_sign_sha256 (se,
1452 &buffer, &buffer_size, flags);
1453 if (status != 0)
1454 {
1455 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1456 "signature failed "
1457 "with status %i.", status);
1458 break;
1459 }
1460 }
1461 #if HAVE_LIBGCRYPT
1462 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1463 && (packet_was_encrypted == 0)
1464 && (packet_was_signed == 0))
1465 {
1466 if (printed_ignore_warning == 0)
1467 {
1468 INFO ("network plugin: Unsigned packet or "
1469 "part has been ignored.");
1470 printed_ignore_warning = 1;
1471 }
1472 buffer = ((char *) buffer) + pkg_length;
1473 continue;
1474 }
1475 #endif /* HAVE_LIBGCRYPT */
1476 else if (pkg_type == TYPE_VALUES)
1477 {
1478 status = parse_part_values (&buffer, &buffer_size,
1479 &vl.values, &vl.values_len);
1480 if (status != 0)
1481 break;
1483 network_dispatch_values (&vl, username);
1485 sfree (vl.values);
1486 }
1487 else if (pkg_type == TYPE_TIME)
1488 {
1489 uint64_t tmp = 0;
1490 status = parse_part_number (&buffer, &buffer_size,
1491 &tmp);
1492 if (status == 0)
1493 {
1494 vl.time = TIME_T_TO_CDTIME_T (tmp);
1495 n.time = TIME_T_TO_CDTIME_T (tmp);
1496 }
1497 }
1498 else if (pkg_type == TYPE_TIME_HR)
1499 {
1500 uint64_t tmp = 0;
1501 status = parse_part_number (&buffer, &buffer_size,
1502 &tmp);
1503 if (status == 0)
1504 {
1505 vl.time = (cdtime_t) tmp;
1506 n.time = (cdtime_t) tmp;
1507 }
1508 }
1509 else if (pkg_type == TYPE_INTERVAL)
1510 {
1511 uint64_t tmp = 0;
1512 status = parse_part_number (&buffer, &buffer_size,
1513 &tmp);
1514 if (status == 0)
1515 vl.interval = TIME_T_TO_CDTIME_T (tmp);
1516 }
1517 else if (pkg_type == TYPE_INTERVAL_HR)
1518 {
1519 uint64_t tmp = 0;
1520 status = parse_part_number (&buffer, &buffer_size,
1521 &tmp);
1522 if (status == 0)
1523 vl.interval = (cdtime_t) tmp;
1524 }
1525 else if (pkg_type == TYPE_HOST)
1526 {
1527 status = parse_part_string (&buffer, &buffer_size,
1528 vl.host, sizeof (vl.host));
1529 if (status == 0)
1530 sstrncpy (n.host, vl.host, sizeof (n.host));
1531 }
1532 else if (pkg_type == TYPE_PLUGIN)
1533 {
1534 status = parse_part_string (&buffer, &buffer_size,
1535 vl.plugin, sizeof (vl.plugin));
1536 if (status == 0)
1537 sstrncpy (n.plugin, vl.plugin,
1538 sizeof (n.plugin));
1539 }
1540 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1541 {
1542 status = parse_part_string (&buffer, &buffer_size,
1543 vl.plugin_instance,
1544 sizeof (vl.plugin_instance));
1545 if (status == 0)
1546 sstrncpy (n.plugin_instance,
1547 vl.plugin_instance,
1548 sizeof (n.plugin_instance));
1549 }
1550 else if (pkg_type == TYPE_TYPE)
1551 {
1552 status = parse_part_string (&buffer, &buffer_size,
1553 vl.type, sizeof (vl.type));
1554 if (status == 0)
1555 sstrncpy (n.type, vl.type, sizeof (n.type));
1556 }
1557 else if (pkg_type == TYPE_TYPE_INSTANCE)
1558 {
1559 status = parse_part_string (&buffer, &buffer_size,
1560 vl.type_instance,
1561 sizeof (vl.type_instance));
1562 if (status == 0)
1563 sstrncpy (n.type_instance, vl.type_instance,
1564 sizeof (n.type_instance));
1565 }
1566 else if (pkg_type == TYPE_MESSAGE)
1567 {
1568 status = parse_part_string (&buffer, &buffer_size,
1569 n.message, sizeof (n.message));
1571 if (status != 0)
1572 {
1573 /* do nothing */
1574 }
1575 else if ((n.severity != NOTIF_FAILURE)
1576 && (n.severity != NOTIF_WARNING)
1577 && (n.severity != NOTIF_OKAY))
1578 {
1579 INFO ("network plugin: "
1580 "Ignoring notification with "
1581 "unknown severity %i.",
1582 n.severity);
1583 }
1584 else if (n.time <= 0)
1585 {
1586 INFO ("network plugin: "
1587 "Ignoring notification with "
1588 "time == 0.");
1589 }
1590 else if (strlen (n.message) <= 0)
1591 {
1592 INFO ("network plugin: "
1593 "Ignoring notification with "
1594 "an empty message.");
1595 }
1596 else
1597 {
1598 network_dispatch_notification (&n);
1599 }
1600 }
1601 else if (pkg_type == TYPE_SEVERITY)
1602 {
1603 uint64_t tmp = 0;
1604 status = parse_part_number (&buffer, &buffer_size,
1605 &tmp);
1606 if (status == 0)
1607 n.severity = (int) tmp;
1608 }
1609 else
1610 {
1611 DEBUG ("network plugin: parse_packet: Unknown part"
1612 " type: 0x%04hx", pkg_type);
1613 buffer = ((char *) buffer) + pkg_length;
1614 }
1615 } /* while (buffer_size > sizeof (part_header_t)) */
1617 if (status == 0 && buffer_size > 0)
1618 WARNING ("network plugin: parse_packet: Received truncated "
1619 "packet, try increasing `MaxPacketSize'");
1621 return (status);
1622 } /* }}} int parse_packet */
1624 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1625 {
1626 if (sec->fd >= 0)
1627 {
1628 close (sec->fd);
1629 sec->fd = -1;
1630 }
1631 sfree (sec->addr);
1632 #if HAVE_LIBGCRYPT
1633 sfree (sec->username);
1634 sfree (sec->password);
1635 if (sec->cypher != NULL)
1636 gcry_cipher_close (sec->cypher);
1637 #endif
1638 } /* }}} void free_sockent_client */
1640 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1641 {
1642 size_t i;
1644 for (i = 0; i < ses->fd_num; i++)
1645 {
1646 if (ses->fd[i] >= 0)
1647 {
1648 close (ses->fd[i]);
1649 ses->fd[i] = -1;
1650 }
1651 }
1653 sfree (ses->fd);
1654 #if HAVE_LIBGCRYPT
1655 sfree (ses->auth_file);
1656 fbh_destroy (ses->userdb);
1657 if (ses->cypher != NULL)
1658 gcry_cipher_close (ses->cypher);
1659 #endif
1660 } /* }}} void free_sockent_server */
1662 static void sockent_destroy (sockent_t *se) /* {{{ */
1663 {
1664 sockent_t *next;
1666 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1668 while (se != NULL)
1669 {
1670 next = se->next;
1672 sfree (se->node);
1673 sfree (se->service);
1675 if (se->type == SOCKENT_TYPE_CLIENT)
1676 free_sockent_client (&se->data.client);
1677 else
1678 free_sockent_server (&se->data.server);
1680 sfree (se);
1681 se = next;
1682 }
1683 } /* }}} void sockent_destroy */
1685 /*
1686 * int network_set_ttl
1687 *
1688 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1689 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1690 *
1691 * The `struct addrinfo' is used to destinguish between unicast and multicast
1692 * sockets.
1693 */
1694 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1695 {
1696 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1697 network_config_ttl);
1699 assert (se->type == SOCKENT_TYPE_CLIENT);
1701 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1702 return (-1);
1704 if (ai->ai_family == AF_INET)
1705 {
1706 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1707 int optname;
1709 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1710 optname = IP_MULTICAST_TTL;
1711 else
1712 optname = IP_TTL;
1714 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1715 &network_config_ttl,
1716 sizeof (network_config_ttl)) != 0)
1717 {
1718 char errbuf[1024];
1719 ERROR ("network plugin: setsockopt (ipv4-ttl): %s",
1720 sstrerror (errno, errbuf, sizeof (errbuf)));
1721 return (-1);
1722 }
1723 }
1724 else if (ai->ai_family == AF_INET6)
1725 {
1726 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1727 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1728 int optname;
1730 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1731 optname = IPV6_MULTICAST_HOPS;
1732 else
1733 optname = IPV6_UNICAST_HOPS;
1735 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1736 &network_config_ttl,
1737 sizeof (network_config_ttl)) != 0)
1738 {
1739 char errbuf[1024];
1740 ERROR ("network plugin: setsockopt(ipv6-ttl): %s",
1741 sstrerror (errno, errbuf,
1742 sizeof (errbuf)));
1743 return (-1);
1744 }
1745 }
1747 return (0);
1748 } /* int network_set_ttl */
1750 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1751 {
1752 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1753 se->interface);
1755 assert (se->type == SOCKENT_TYPE_CLIENT);
1757 if (ai->ai_family == AF_INET)
1758 {
1759 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1761 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1762 {
1763 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1764 /* If possible, use the "ip_mreqn" structure which has
1765 * an "interface index" member. Using the interface
1766 * index is preferred here, because of its similarity
1767 * to the way IPv6 handles this. Unfortunately, it
1768 * appears not to be portable. */
1769 struct ip_mreqn mreq;
1771 memset (&mreq, 0, sizeof (mreq));
1772 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1773 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1774 mreq.imr_ifindex = se->interface;
1775 #else
1776 struct ip_mreq mreq;
1778 memset (&mreq, 0, sizeof (mreq));
1779 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1780 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1781 #endif
1783 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1784 &mreq, sizeof (mreq)) != 0)
1785 {
1786 char errbuf[1024];
1787 ERROR ("network plugin: setsockopt (ipv4-multicast-if): %s",
1788 sstrerror (errno, errbuf, sizeof (errbuf)));
1789 return (-1);
1790 }
1792 return (0);
1793 }
1794 }
1795 else if (ai->ai_family == AF_INET6)
1796 {
1797 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1799 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1800 {
1801 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1802 &se->interface,
1803 sizeof (se->interface)) != 0)
1804 {
1805 char errbuf[1024];
1806 ERROR ("network plugin: setsockopt (ipv6-multicast-if): %s",
1807 sstrerror (errno, errbuf,
1808 sizeof (errbuf)));
1809 return (-1);
1810 }
1812 return (0);
1813 }
1814 }
1816 /* else: Not a multicast interface. */
1817 if (se->interface != 0)
1818 {
1819 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1820 char interface_name[IFNAMSIZ];
1822 if (if_indextoname (se->interface, interface_name) == NULL)
1823 return (-1);
1825 DEBUG ("network plugin: Binding socket to interface %s", interface_name);
1827 if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
1828 interface_name,
1829 sizeof(interface_name)) == -1 )
1830 {
1831 char errbuf[1024];
1832 ERROR ("network plugin: setsockopt (bind-if): %s",
1833 sstrerror (errno, errbuf, sizeof (errbuf)));
1834 return (-1);
1835 }
1836 /* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1838 #else
1839 WARNING ("network plugin: Cannot set the interface on a unicast "
1840 "socket because "
1841 # if !defined(SO_BINDTODEVICE)
1842 "the \"SO_BINDTODEVICE\" socket option "
1843 # else
1844 "the \"if_indextoname\" function "
1845 # endif
1846 "is not available on your system.");
1847 #endif
1849 }
1851 return (0);
1852 } /* }}} network_set_interface */
1854 static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
1855 {
1856 #if KERNEL_SOLARIS
1857 char loop = 0;
1858 #else
1859 int loop = 0;
1860 #endif
1861 int yes = 1;
1863 /* allow multiple sockets to use the same PORT number */
1864 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1865 &yes, sizeof(yes)) == -1) {
1866 char errbuf[1024];
1867 ERROR ("network plugin: setsockopt (reuseaddr): %s",
1868 sstrerror (errno, errbuf, sizeof (errbuf)));
1869 return (-1);
1870 }
1872 DEBUG ("fd = %i; calling `bind'", fd);
1874 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1875 {
1876 char errbuf[1024];
1877 ERROR ("bind: %s",
1878 sstrerror (errno, errbuf, sizeof (errbuf)));
1879 return (-1);
1880 }
1882 if (ai->ai_family == AF_INET)
1883 {
1884 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1885 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1886 {
1887 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1888 struct ip_mreqn mreq;
1889 #else
1890 struct ip_mreq mreq;
1891 #endif
1893 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1895 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1896 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1897 /* Set the interface using the interface index if
1898 * possible (available). Unfortunately, the struct
1899 * ip_mreqn is not portable. */
1900 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1901 mreq.imr_ifindex = interface_idx;
1902 #else
1903 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1904 #endif
1906 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1907 &loop, sizeof (loop)) == -1)
1908 {
1909 char errbuf[1024];
1910 ERROR ("network plugin: setsockopt (multicast-loop): %s",
1911 sstrerror (errno, errbuf,
1912 sizeof (errbuf)));
1913 return (-1);
1914 }
1916 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1917 &mreq, sizeof (mreq)) == -1)
1918 {
1919 char errbuf[1024];
1920 ERROR ("network plugin: setsockopt (add-membership): %s",
1921 sstrerror (errno, errbuf,
1922 sizeof (errbuf)));
1923 return (-1);
1924 }
1926 return (0);
1927 }
1928 }
1929 else if (ai->ai_family == AF_INET6)
1930 {
1931 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1932 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1933 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1934 {
1935 struct ipv6_mreq mreq;
1937 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1939 memcpy (&mreq.ipv6mr_multiaddr,
1940 &addr->sin6_addr,
1941 sizeof (addr->sin6_addr));
1943 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1944 * ipv6mr_interface may be set to zeroes to
1945 * choose the default multicast interface or to
1946 * the index of a particular multicast-capable
1947 * interface if the host is multihomed.
1948 * Membership is associ-associated with a
1949 * single interface; programs running on
1950 * multihomed hosts may need to join the same
1951 * group on more than one interface.*/
1952 mreq.ipv6mr_interface = interface_idx;
1954 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1955 &loop, sizeof (loop)) == -1)
1956 {
1957 char errbuf[1024];
1958 ERROR ("network plugin: setsockopt (ipv6-multicast-loop): %s",
1959 sstrerror (errno, errbuf,
1960 sizeof (errbuf)));
1961 return (-1);
1962 }
1964 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1965 &mreq, sizeof (mreq)) == -1)
1966 {
1967 char errbuf[1024];
1968 ERROR ("network plugin: setsockopt (ipv6-add-membership): %s",
1969 sstrerror (errno, errbuf,
1970 sizeof (errbuf)));
1971 return (-1);
1972 }
1974 return (0);
1975 }
1976 }
1978 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1979 /* if a specific interface was set, bind the socket to it. But to avoid
1980 * possible problems with multicast routing, only do that for non-multicast
1981 * addresses */
1982 if (interface_idx != 0)
1983 {
1984 char interface_name[IFNAMSIZ];
1986 if (if_indextoname (interface_idx, interface_name) == NULL)
1987 return (-1);
1989 DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
1991 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
1992 interface_name,
1993 sizeof(interface_name)) == -1 )
1994 {
1995 char errbuf[1024];
1996 ERROR ("network plugin: setsockopt (bind-if): %s",
1997 sstrerror (errno, errbuf, sizeof (errbuf)));
1998 return (-1);
1999 }
2000 }
2001 #endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
2003 return (0);
2004 } /* int network_bind_socket */
2006 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
2007 * or `SOCKENT_TYPE_SERVER' */
2008 static sockent_t *sockent_create (int type) /* {{{ */
2009 {
2010 sockent_t *se;
2012 if ((type != SOCKENT_TYPE_CLIENT) && (type != SOCKENT_TYPE_SERVER))
2013 return (NULL);
2015 se = calloc (1, sizeof (*se));
2016 if (se == NULL)
2017 return (NULL);
2019 se->type = type;
2020 se->node = NULL;
2021 se->service = NULL;
2022 se->interface = 0;
2023 se->next = NULL;
2025 if (type == SOCKENT_TYPE_SERVER)
2026 {
2027 se->data.server.fd = NULL;
2028 se->data.server.fd_num = 0;
2029 #if HAVE_LIBGCRYPT
2030 se->data.server.security_level = SECURITY_LEVEL_NONE;
2031 se->data.server.auth_file = NULL;
2032 se->data.server.userdb = NULL;
2033 se->data.server.cypher = NULL;
2034 #endif
2035 }
2036 else
2037 {
2038 se->data.client.fd = -1;
2039 se->data.client.addr = NULL;
2040 se->data.client.resolve_interval = 0;
2041 se->data.client.next_resolve_reconnect = 0;
2042 #if HAVE_LIBGCRYPT
2043 se->data.client.security_level = SECURITY_LEVEL_NONE;
2044 se->data.client.username = NULL;
2045 se->data.client.password = NULL;
2046 se->data.client.cypher = NULL;
2047 #endif
2048 }
2050 return (se);
2051 } /* }}} sockent_t *sockent_create */
2053 static int sockent_init_crypto (sockent_t *se) /* {{{ */
2054 {
2055 #if HAVE_LIBGCRYPT /* {{{ */
2056 if (se->type == SOCKENT_TYPE_CLIENT)
2057 {
2058 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
2059 {
2060 network_init_gcrypt ();
2062 if ((se->data.client.username == NULL)
2063 || (se->data.client.password == NULL))
2064 {
2065 ERROR ("network plugin: Client socket with "
2066 "security requested, but no "
2067 "credentials are configured.");
2068 return (-1);
2069 }
2070 gcry_md_hash_buffer (GCRY_MD_SHA256,
2071 se->data.client.password_hash,
2072 se->data.client.password,
2073 strlen (se->data.client.password));
2074 }
2075 }
2076 else /* (se->type == SOCKENT_TYPE_SERVER) */
2077 {
2078 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2079 {
2080 network_init_gcrypt ();
2082 if (se->data.server.auth_file == NULL)
2083 {
2084 ERROR ("network plugin: Server socket with "
2085 "security requested, but no "
2086 "password file is configured.");
2087 return (-1);
2088 }
2089 }
2090 if (se->data.server.auth_file != NULL)
2091 {
2092 se->data.server.userdb = fbh_create (se->data.server.auth_file);
2093 if (se->data.server.userdb == NULL)
2094 {
2095 ERROR ("network plugin: Reading password file "
2096 "`%s' failed.",
2097 se->data.server.auth_file);
2098 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2099 return (-1);
2100 }
2101 }
2102 }
2103 #endif /* }}} HAVE_LIBGCRYPT */
2105 return (0);
2106 } /* }}} int sockent_init_crypto */
2108 static int sockent_client_disconnect (sockent_t *se) /* {{{ */
2109 {
2110 struct sockent_client *client;
2112 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2113 return (EINVAL);
2115 client = &se->data.client;
2116 if (client->fd >= 0) /* connected */
2117 {
2118 close (client->fd);
2119 client->fd = -1;
2120 }
2122 sfree (client->addr);
2123 client->addrlen = 0;
2125 return (0);
2126 } /* }}} int sockent_client_disconnect */
2128 static int sockent_client_connect (sockent_t *se) /* {{{ */
2129 {
2130 static c_complain_t complaint = C_COMPLAIN_INIT_STATIC;
2132 struct sockent_client *client;
2133 struct addrinfo ai_hints;
2134 struct addrinfo *ai_list = NULL, *ai_ptr;
2135 int status;
2136 _Bool reconnect = 0;
2137 cdtime_t now;
2139 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2140 return (EINVAL);
2142 client = &se->data.client;
2144 now = cdtime ();
2145 if (client->resolve_interval != 0 && client->next_resolve_reconnect < now) {
2146 DEBUG("network plugin: Reconnecting socket, resolve_interval = %lf, next_resolve_reconnect = %lf",
2147 CDTIME_T_TO_DOUBLE(client->resolve_interval), CDTIME_T_TO_DOUBLE(client->next_resolve_reconnect));
2148 reconnect = 1;
2149 }
2151 if (client->fd >= 0 && !reconnect) /* already connected and not stale*/
2152 return (0);
2154 memset (&ai_hints, 0, sizeof (ai_hints));
2155 #ifdef AI_ADDRCONFIG
2156 ai_hints.ai_flags |= AI_ADDRCONFIG;
2157 #endif
2158 ai_hints.ai_family = AF_UNSPEC;
2159 ai_hints.ai_socktype = SOCK_DGRAM;
2160 ai_hints.ai_protocol = IPPROTO_UDP;
2162 status = getaddrinfo (se->node,
2163 (se->service != NULL) ? se->service : NET_DEFAULT_PORT,
2164 &ai_hints, &ai_list);
2165 if (status != 0)
2166 {
2167 c_complain (LOG_ERR, &complaint,
2168 "network plugin: getaddrinfo (%s, %s) failed: %s",
2169 (se->node == NULL) ? "(null)" : se->node,
2170 (se->service == NULL) ? "(null)" : se->service,
2171 gai_strerror (status));
2172 return (-1);
2173 }
2174 else
2175 {
2176 c_release (LOG_NOTICE, &complaint,
2177 "network plugin: Successfully resolved \"%s\".",
2178 se->node);
2179 }
2181 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2182 {
2183 if (client->fd >= 0) /* when we reconnect */
2184 sockent_client_disconnect(se);
2186 client->fd = socket (ai_ptr->ai_family,
2187 ai_ptr->ai_socktype,
2188 ai_ptr->ai_protocol);
2189 if (client->fd < 0)
2190 {
2191 char errbuf[1024];
2192 ERROR ("network plugin: socket(2) failed: %s",
2193 sstrerror (errno, errbuf,
2194 sizeof (errbuf)));
2195 continue;
2196 }
2198 client->addr = calloc (1, sizeof (*client->addr));
2199 if (client->addr == NULL)
2200 {
2201 ERROR ("network plugin: calloc failed.");
2202 close (client->fd);
2203 client->fd = -1;
2204 continue;
2205 }
2207 assert (sizeof (*client->addr) >= ai_ptr->ai_addrlen);
2208 memcpy (client->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2209 client->addrlen = ai_ptr->ai_addrlen;
2211 network_set_ttl (se, ai_ptr);
2212 network_set_interface (se, ai_ptr);
2214 /* We don't open more than one write-socket per
2215 * node/service pair.. */
2216 break;
2217 }
2219 freeaddrinfo (ai_list);
2220 if (client->fd < 0)
2221 return (-1);
2223 if (client->resolve_interval > 0)
2224 client->next_resolve_reconnect = now + client->resolve_interval;
2225 return (0);
2226 } /* }}} int sockent_client_connect */
2228 /* Open the file descriptors for a initialized sockent structure. */
2229 static int sockent_server_listen (sockent_t *se) /* {{{ */
2230 {
2231 struct addrinfo ai_hints;
2232 struct addrinfo *ai_list, *ai_ptr;
2233 int status;
2235 const char *node;
2236 const char *service;
2238 if (se == NULL)
2239 return (-1);
2241 assert (se->data.server.fd == NULL);
2242 assert (se->data.server.fd_num == 0);
2244 node = se->node;
2245 service = se->service;
2247 if (service == NULL)
2248 service = NET_DEFAULT_PORT;
2250 DEBUG ("network plugin: sockent_server_listen: node = %s; service = %s;",
2251 node, service);
2253 memset (&ai_hints, 0, sizeof (ai_hints));
2254 ai_hints.ai_flags = 0;
2255 #ifdef AI_PASSIVE
2256 ai_hints.ai_flags |= AI_PASSIVE;
2257 #endif
2258 #ifdef AI_ADDRCONFIG
2259 ai_hints.ai_flags |= AI_ADDRCONFIG;
2260 #endif
2261 ai_hints.ai_family = AF_UNSPEC;
2262 ai_hints.ai_socktype = SOCK_DGRAM;
2263 ai_hints.ai_protocol = IPPROTO_UDP;
2265 status = getaddrinfo (node, service, &ai_hints, &ai_list);
2266 if (status != 0)
2267 {
2268 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
2269 (se->node == NULL) ? "(null)" : se->node,
2270 (se->service == NULL) ? "(null)" : se->service,
2271 gai_strerror (status));
2272 return (-1);
2273 }
2275 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2276 {
2277 int *tmp;
2279 tmp = realloc (se->data.server.fd,
2280 sizeof (*tmp) * (se->data.server.fd_num + 1));
2281 if (tmp == NULL)
2282 {
2283 ERROR ("network plugin: realloc failed.");
2284 continue;
2285 }
2286 se->data.server.fd = tmp;
2287 tmp = se->data.server.fd + se->data.server.fd_num;
2289 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
2290 ai_ptr->ai_protocol);
2291 if (*tmp < 0)
2292 {
2293 char errbuf[1024];
2294 ERROR ("network plugin: socket(2) failed: %s",
2295 sstrerror (errno, errbuf,
2296 sizeof (errbuf)));
2297 continue;
2298 }
2300 status = network_bind_socket (*tmp, ai_ptr, se->interface);
2301 if (status != 0)
2302 {
2303 close (*tmp);
2304 *tmp = -1;
2305 continue;
2306 }
2308 se->data.server.fd_num++;
2309 continue;
2310 } /* for (ai_list) */
2312 freeaddrinfo (ai_list);
2314 if (se->data.server.fd_num <= 0)
2315 return (-1);
2316 return (0);
2317 } /* }}} int sockent_server_listen */
2319 /* Add a sockent to the global list of sockets */
2320 static int sockent_add (sockent_t *se) /* {{{ */
2321 {
2322 sockent_t *last_ptr;
2324 if (se == NULL)
2325 return (-1);
2327 if (se->type == SOCKENT_TYPE_SERVER)
2328 {
2329 struct pollfd *tmp;
2330 size_t i;
2332 tmp = realloc (listen_sockets_pollfd,
2333 sizeof (*tmp) * (listen_sockets_num
2334 + se->data.server.fd_num));
2335 if (tmp == NULL)
2336 {
2337 ERROR ("network plugin: realloc failed.");
2338 return (-1);
2339 }
2340 listen_sockets_pollfd = tmp;
2341 tmp = listen_sockets_pollfd + listen_sockets_num;
2343 for (i = 0; i < se->data.server.fd_num; i++)
2344 {
2345 memset (tmp + i, 0, sizeof (*tmp));
2346 tmp[i].fd = se->data.server.fd[i];
2347 tmp[i].events = POLLIN | POLLPRI;
2348 tmp[i].revents = 0;
2349 }
2351 listen_sockets_num += se->data.server.fd_num;
2353 if (listen_sockets == NULL)
2354 {
2355 listen_sockets = se;
2356 return (0);
2357 }
2358 last_ptr = listen_sockets;
2359 }
2360 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2361 {
2362 if (sending_sockets == NULL)
2363 {
2364 sending_sockets = se;
2365 return (0);
2366 }
2367 last_ptr = sending_sockets;
2368 }
2370 while (last_ptr->next != NULL)
2371 last_ptr = last_ptr->next;
2372 last_ptr->next = se;
2374 return (0);
2375 } /* }}} int sockent_add */
2377 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
2378 {
2379 while (42)
2380 {
2381 receive_list_entry_t *ent;
2382 sockent_t *se;
2384 /* Lock and wait for more data to come in */
2385 pthread_mutex_lock (&receive_list_lock);
2386 while ((listen_loop == 0)
2387 && (receive_list_head == NULL))
2388 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
2390 /* Remove the head entry and unlock */
2391 ent = receive_list_head;
2392 if (ent != NULL)
2393 receive_list_head = ent->next;
2394 receive_list_length--;
2395 pthread_mutex_unlock (&receive_list_lock);
2397 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2398 * because we dispatch all missing packets before shutting down. */
2399 if (ent == NULL)
2400 break;
2402 /* Look for the correct `sockent_t' */
2403 se = listen_sockets;
2404 while (se != NULL)
2405 {
2406 size_t i;
2408 for (i = 0; i < se->data.server.fd_num; i++)
2409 if (se->data.server.fd[i] == ent->fd)
2410 break;
2412 if (i < se->data.server.fd_num)
2413 break;
2415 se = se->next;
2416 }
2418 if (se == NULL)
2419 {
2420 ERROR ("network plugin: Got packet from FD %i, but can't "
2421 "find an appropriate socket entry.",
2422 ent->fd);
2423 sfree (ent->data);
2424 sfree (ent);
2425 continue;
2426 }
2428 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0,
2429 /* username = */ NULL);
2430 sfree (ent->data);
2431 sfree (ent);
2432 } /* while (42) */
2434 return (NULL);
2435 } /* }}} void *dispatch_thread */
2437 static int network_receive (void) /* {{{ */
2438 {
2439 char buffer[network_config_packet_size];
2440 int buffer_len;
2442 size_t i;
2443 int status = 0;
2445 receive_list_entry_t *private_list_head;
2446 receive_list_entry_t *private_list_tail;
2447 uint64_t private_list_length;
2449 assert (listen_sockets_num > 0);
2451 private_list_head = NULL;
2452 private_list_tail = NULL;
2453 private_list_length = 0;
2455 while (listen_loop == 0)
2456 {
2457 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2458 if (status <= 0)
2459 {
2460 char errbuf[1024];
2461 if (errno == EINTR)
2462 continue;
2463 ERROR ("network plugin: poll(2) failed: %s",
2464 sstrerror (errno, errbuf, sizeof (errbuf)));
2465 break;
2466 }
2468 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2469 {
2470 receive_list_entry_t *ent;
2472 if ((listen_sockets_pollfd[i].revents
2473 & (POLLIN | POLLPRI)) == 0)
2474 continue;
2475 status--;
2477 buffer_len = recv (listen_sockets_pollfd[i].fd,
2478 buffer, sizeof (buffer),
2479 0 /* no flags */);
2480 if (buffer_len < 0)
2481 {
2482 char errbuf[1024];
2483 status = (errno != 0) ? errno : -1;
2484 ERROR ("network plugin: recv(2) failed: %s",
2485 sstrerror (errno, errbuf, sizeof (errbuf)));
2486 break;
2487 }
2489 stats_octets_rx += ((uint64_t) buffer_len);
2490 stats_packets_rx++;
2492 /* TODO: Possible performance enhancement: Do not free
2493 * these entries in the dispatch thread but put them in
2494 * another list, so we don't have to allocate more and
2495 * more of these structures. */
2496 ent = calloc (1, sizeof (*ent));
2497 if (ent == NULL)
2498 {
2499 ERROR ("network plugin: calloc failed.");
2500 status = ENOMEM;
2501 break;
2502 }
2504 ent->data = malloc (*ent->data);
2505 if (ent->data == NULL)
2506 {
2507 sfree (ent);
2508 ERROR ("network plugin: malloc failed.");
2509 status = ENOMEM;
2510 break;
2511 }
2512 ent->fd = listen_sockets_pollfd[i].fd;
2513 ent->next = NULL;
2515 memcpy (ent->data, buffer, buffer_len);
2516 ent->data_len = buffer_len;
2518 if (private_list_head == NULL)
2519 private_list_head = ent;
2520 else
2521 private_list_tail->next = ent;
2522 private_list_tail = ent;
2523 private_list_length++;
2525 /* Do not block here. Blocking here has led to
2526 * insufficient performance in the past. */
2527 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2528 {
2529 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2530 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2532 if (receive_list_head == NULL)
2533 receive_list_head = private_list_head;
2534 else
2535 receive_list_tail->next = private_list_head;
2536 receive_list_tail = private_list_tail;
2537 receive_list_length += private_list_length;
2539 pthread_cond_signal (&receive_list_cond);
2540 pthread_mutex_unlock (&receive_list_lock);
2542 private_list_head = NULL;
2543 private_list_tail = NULL;
2544 private_list_length = 0;
2545 }
2547 status = 0;
2548 } /* for (listen_sockets_pollfd) */
2550 if (status != 0)
2551 break;
2552 } /* while (listen_loop == 0) */
2554 /* Make sure everything is dispatched before exiting. */
2555 if (private_list_head != NULL)
2556 {
2557 pthread_mutex_lock (&receive_list_lock);
2559 if (receive_list_head == NULL)
2560 receive_list_head = private_list_head;
2561 else
2562 receive_list_tail->next = private_list_head;
2563 receive_list_tail = private_list_tail;
2564 receive_list_length += private_list_length;
2566 pthread_cond_signal (&receive_list_cond);
2567 pthread_mutex_unlock (&receive_list_lock);
2568 }
2570 return (status);
2571 } /* }}} int network_receive */
2573 static void *receive_thread (void __attribute__((unused)) *arg)
2574 {
2575 return (network_receive () ? (void *) 1 : (void *) 0);
2576 } /* void *receive_thread */
2578 static void network_init_buffer (void)
2579 {
2580 memset (send_buffer, 0, network_config_packet_size);
2581 send_buffer_ptr = send_buffer;
2582 send_buffer_fill = 0;
2583 send_buffer_last_update = 0;
2585 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2586 } /* int network_init_buffer */
2588 static void network_send_buffer_plain (sockent_t *se, /* {{{ */
2589 const char *buffer, size_t buffer_size)
2590 {
2591 int status;
2593 while (42)
2594 {
2595 status = sockent_client_connect (se);
2596 if (status != 0)
2597 return;
2599 status = sendto (se->data.client.fd, buffer, buffer_size,
2600 /* flags = */ 0,
2601 (struct sockaddr *) se->data.client.addr,
2602 se->data.client.addrlen);
2603 if (status < 0)
2604 {
2605 char errbuf[1024];
2607 if ((errno == EINTR) || (errno == EAGAIN))
2608 continue;
2610 ERROR ("network plugin: sendto failed: %s. Closing sending socket.",
2611 sstrerror (errno, errbuf, sizeof (errbuf)));
2612 sockent_client_disconnect (se);
2613 return;
2614 }
2616 break;
2617 } /* while (42) */
2618 } /* }}} void network_send_buffer_plain */
2620 #if HAVE_LIBGCRYPT
2621 #define BUFFER_ADD(p,s) do { \
2622 memcpy (buffer + buffer_offset, (p), (s)); \
2623 buffer_offset += (s); \
2624 } while (0)
2626 static void network_send_buffer_signed (sockent_t *se, /* {{{ */
2627 const char *in_buffer, size_t in_buffer_size)
2628 {
2629 part_signature_sha256_t ps;
2630 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2631 size_t buffer_offset;
2632 size_t username_len;
2634 gcry_md_hd_t hd;
2635 gcry_error_t err;
2636 unsigned char *hash;
2638 hd = NULL;
2639 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2640 if (err != 0)
2641 {
2642 ERROR ("network plugin: Creating HMAC object failed: %s",
2643 gcry_strerror (err));
2644 return;
2645 }
2647 err = gcry_md_setkey (hd, se->data.client.password,
2648 strlen (se->data.client.password));
2649 if (err != 0)
2650 {
2651 ERROR ("network plugin: gcry_md_setkey failed: %s",
2652 gcry_strerror (err));
2653 gcry_md_close (hd);
2654 return;
2655 }
2657 username_len = strlen (se->data.client.username);
2658 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2659 {
2660 ERROR ("network plugin: Username too long: %s",
2661 se->data.client.username);
2662 return;
2663 }
2665 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2666 se->data.client.username, username_len);
2667 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2668 in_buffer, in_buffer_size);
2670 /* Initialize the `ps' structure. */
2671 memset (&ps, 0, sizeof (ps));
2672 ps.head.type = htons (TYPE_SIGN_SHA256);
2673 ps.head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len);
2675 /* Calculate the hash value. */
2676 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2677 username_len + in_buffer_size);
2678 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2679 if (hash == NULL)
2680 {
2681 ERROR ("network plugin: gcry_md_read failed.");
2682 gcry_md_close (hd);
2683 return;
2684 }
2685 memcpy (ps.hash, hash, sizeof (ps.hash));
2687 /* Add the header */
2688 buffer_offset = 0;
2690 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2691 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2692 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2694 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2696 gcry_md_close (hd);
2697 hd = NULL;
2699 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2700 network_send_buffer_plain (se, buffer, buffer_offset);
2701 } /* }}} void network_send_buffer_signed */
2703 static void network_send_buffer_encrypted (sockent_t *se, /* {{{ */
2704 const char *in_buffer, size_t in_buffer_size)
2705 {
2706 part_encryption_aes256_t pea;
2707 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2708 size_t buffer_size;
2709 size_t buffer_offset;
2710 size_t header_size;
2711 size_t username_len;
2712 gcry_error_t err;
2713 gcry_cipher_hd_t cypher;
2715 /* Initialize the header fields */
2716 memset (&pea, 0, sizeof (pea));
2717 pea.head.type = htons (TYPE_ENCR_AES256);
2719 pea.username = se->data.client.username;
2721 username_len = strlen (pea.username);
2722 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2723 {
2724 ERROR ("network plugin: Username too long: %s", pea.username);
2725 return;
2726 }
2728 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2729 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2730 - sizeof (pea.hash);
2732 assert (buffer_size <= sizeof (buffer));
2733 DEBUG ("network plugin: network_send_buffer_encrypted: "
2734 "buffer_size = %zu;", buffer_size);
2736 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2737 + username_len + in_buffer_size));
2738 pea.username_length = htons ((uint16_t) username_len);
2740 /* Chose a random initialization vector. */
2741 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2743 /* Create hash of the payload */
2744 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2746 /* Initialize the buffer */
2747 buffer_offset = 0;
2748 memset (buffer, 0, sizeof (buffer));
2751 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2752 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2753 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2754 BUFFER_ADD (pea.username, username_len);
2755 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2756 assert (buffer_offset == header_size);
2757 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2758 BUFFER_ADD (in_buffer, in_buffer_size);
2760 assert (buffer_offset == buffer_size);
2762 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2763 se->data.client.password);
2764 if (cypher == NULL)
2765 return;
2767 /* Encrypt the buffer in-place */
2768 err = gcry_cipher_encrypt (cypher,
2769 buffer + header_size,
2770 buffer_size - header_size,
2771 /* in = */ NULL, /* in len = */ 0);
2772 if (err != 0)
2773 {
2774 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2775 gcry_strerror (err));
2776 return;
2777 }
2779 /* Send it out without further modifications */
2780 network_send_buffer_plain (se, buffer, buffer_size);
2781 } /* }}} void network_send_buffer_encrypted */
2782 #undef BUFFER_ADD
2783 #endif /* HAVE_LIBGCRYPT */
2785 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2786 {
2787 sockent_t *se;
2789 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2791 for (se = sending_sockets; se != NULL; se = se->next)
2792 {
2793 #if HAVE_LIBGCRYPT
2794 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2795 network_send_buffer_encrypted (se, buffer, buffer_len);
2796 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2797 network_send_buffer_signed (se, buffer, buffer_len);
2798 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2799 #endif /* HAVE_LIBGCRYPT */
2800 network_send_buffer_plain (se, buffer, buffer_len);
2801 } /* for (sending_sockets) */
2802 } /* }}} void network_send_buffer */
2804 static int add_to_buffer (char *buffer, int buffer_size, /* {{{ */
2805 value_list_t *vl_def,
2806 const data_set_t *ds, const value_list_t *vl)
2807 {
2808 char *buffer_orig = buffer;
2810 if (strcmp (vl_def->host, vl->host) != 0)
2811 {
2812 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2813 vl->host, strlen (vl->host)) != 0)
2814 return (-1);
2815 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2816 }
2818 if (vl_def->time != vl->time)
2819 {
2820 if (write_part_number (&buffer, &buffer_size, TYPE_TIME_HR,
2821 (uint64_t) vl->time))
2822 return (-1);
2823 vl_def->time = vl->time;
2824 }
2826 if (vl_def->interval != vl->interval)
2827 {
2828 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL_HR,
2829 (uint64_t) vl->interval))
2830 return (-1);
2831 vl_def->interval = vl->interval;
2832 }
2834 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2835 {
2836 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2837 vl->plugin, strlen (vl->plugin)) != 0)
2838 return (-1);
2839 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2840 }
2842 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2843 {
2844 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2845 vl->plugin_instance,
2846 strlen (vl->plugin_instance)) != 0)
2847 return (-1);
2848 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2849 }
2851 if (strcmp (vl_def->type, vl->type) != 0)
2852 {
2853 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2854 vl->type, strlen (vl->type)) != 0)
2855 return (-1);
2856 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2857 }
2859 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2860 {
2861 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2862 vl->type_instance,
2863 strlen (vl->type_instance)) != 0)
2864 return (-1);
2865 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2866 }
2868 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2869 return (-1);
2871 return (buffer - buffer_orig);
2872 } /* }}} int add_to_buffer */
2874 static void flush_buffer (void)
2875 {
2876 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2877 send_buffer_fill);
2879 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2881 stats_octets_tx += ((uint64_t) send_buffer_fill);
2882 stats_packets_tx++;
2884 network_init_buffer ();
2885 }
2887 static int network_write (const data_set_t *ds, const value_list_t *vl,
2888 user_data_t __attribute__((unused)) *user_data)
2889 {
2890 int status;
2892 if (!check_send_okay (vl))
2893 {
2894 #if COLLECT_DEBUG
2895 char name[6*DATA_MAX_NAME_LEN];
2896 FORMAT_VL (name, sizeof (name), vl);
2897 name[sizeof (name) - 1] = 0;
2898 DEBUG ("network plugin: network_write: "
2899 "NOT sending %s.", name);
2900 #endif
2901 /* Counter is not protected by another lock and may be reached by
2902 * multiple threads */
2903 pthread_mutex_lock (&stats_lock);
2904 stats_values_not_sent++;
2905 pthread_mutex_unlock (&stats_lock);
2906 return (0);
2907 }
2909 uc_meta_data_add_unsigned_int (vl,
2910 "network:time_sent", (uint64_t) vl->time);
2912 pthread_mutex_lock (&send_buffer_lock);
2914 status = add_to_buffer (send_buffer_ptr,
2915 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2916 &send_buffer_vl,
2917 ds, vl);
2918 if (status >= 0)
2919 {
2920 /* status == bytes added to the buffer */
2921 send_buffer_fill += status;
2922 send_buffer_ptr += status;
2923 send_buffer_last_update = cdtime();
2925 stats_values_sent++;
2926 }
2927 else
2928 {
2929 flush_buffer ();
2931 status = add_to_buffer (send_buffer_ptr,
2932 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2933 &send_buffer_vl,
2934 ds, vl);
2936 if (status >= 0)
2937 {
2938 send_buffer_fill += status;
2939 send_buffer_ptr += status;
2941 stats_values_sent++;
2942 }
2943 }
2945 if (status < 0)
2946 {
2947 ERROR ("network plugin: Unable to append to the "
2948 "buffer for some weird reason");
2949 }
2950 else if ((network_config_packet_size - send_buffer_fill) < 15)
2951 {
2952 flush_buffer ();
2953 }
2955 pthread_mutex_unlock (&send_buffer_lock);
2957 return ((status < 0) ? -1 : 0);
2958 } /* int network_write */
2960 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2961 {
2962 int tmp = 0;
2964 if (cf_util_get_int (ci, &tmp) != 0)
2965 return (-1);
2966 else if ((tmp > 0) && (tmp <= 255))
2967 network_config_ttl = tmp;
2968 else {
2969 WARNING ("network plugin: The `TimeToLive' must be between 1 and 255.");
2970 return (-1);
2971 }
2973 return (0);
2974 } /* }}} int network_config_set_ttl */
2976 static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
2977 int *interface)
2978 {
2979 char if_name[256];
2981 if (cf_util_get_string_buffer (ci, if_name, sizeof (if_name)) != 0)
2982 return (-1);
2984 *interface = if_nametoindex (if_name);
2985 return (0);
2986 } /* }}} int network_config_set_interface */
2988 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
2989 {
2990 int tmp = 0;
2992 if (cf_util_get_int (ci, &tmp) != 0)
2993 return (-1);
2994 else if ((tmp >= 1024) && (tmp <= 65535))
2995 network_config_packet_size = tmp;
2996 else {
2997 WARNING ("network plugin: The `MaxPacketSize' must be between 1024 and 65535.");
2998 return (-1);
2999 }
3001 return (0);
3002 } /* }}} int network_config_set_buffer_size */
3004 #if HAVE_LIBGCRYPT
3005 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
3006 int *retval)
3007 {
3008 char *str;
3009 if ((ci->values_num != 1)
3010 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3011 {
3012 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
3013 "one string argument.");
3014 return (-1);
3015 }
3017 str = ci->values[0].value.string;
3018 if (strcasecmp ("Encrypt", str) == 0)
3019 *retval = SECURITY_LEVEL_ENCRYPT;
3020 else if (strcasecmp ("Sign", str) == 0)
3021 *retval = SECURITY_LEVEL_SIGN;
3022 else if (strcasecmp ("None", str) == 0)
3023 *retval = SECURITY_LEVEL_NONE;
3024 else
3025 {
3026 WARNING ("network plugin: Unknown security level: %s.", str);
3027 return (-1);
3028 }
3030 return (0);
3031 } /* }}} int network_config_set_security_level */
3032 #endif /* HAVE_LIBGCRYPT */
3034 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
3035 {
3036 sockent_t *se;
3037 int status;
3038 int i;
3040 if ((ci->values_num < 1) || (ci->values_num > 2)
3041 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3042 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3043 {
3044 ERROR ("network plugin: The `%s' config option needs "
3045 "one or two string arguments.", ci->key);
3046 return (-1);
3047 }
3049 se = sockent_create (SOCKENT_TYPE_SERVER);
3050 if (se == NULL)
3051 {
3052 ERROR ("network plugin: sockent_create failed.");
3053 return (-1);
3054 }
3056 se->node = strdup (ci->values[0].value.string);
3057 if (ci->values_num >= 2)
3058 se->service = strdup (ci->values[1].value.string);
3060 for (i = 0; i < ci->children_num; i++)
3061 {
3062 oconfig_item_t *child = ci->children + i;
3064 #if HAVE_LIBGCRYPT
3065 if (strcasecmp ("AuthFile", child->key) == 0)
3066 cf_util_get_string (child, &se->data.server.auth_file);
3067 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3068 network_config_set_security_level (child,
3069 &se->data.server.security_level);
3070 else
3071 #endif /* HAVE_LIBGCRYPT */
3072 if (strcasecmp ("Interface", child->key) == 0)
3073 network_config_set_interface (child, &se->interface);
3074 else
3075 {
3076 WARNING ("network plugin: Option `%s' is not allowed here.",
3077 child->key);
3078 }
3079 }
3081 #if HAVE_LIBGCRYPT
3082 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
3083 && (se->data.server.auth_file == NULL))
3084 {
3085 ERROR ("network plugin: A security level higher than `none' was "
3086 "requested, but no AuthFile option was given. Cowardly refusing to "
3087 "open this socket!");
3088 sockent_destroy (se);
3089 return (-1);
3090 }
3091 #endif /* HAVE_LIBGCRYPT */
3093 status = sockent_init_crypto (se);
3094 if (status != 0)
3095 {
3096 ERROR ("network plugin: network_config_add_listen: sockent_init_crypto() failed.");
3097 sockent_destroy (se);
3098 return (-1);
3099 }
3101 status = sockent_server_listen (se);
3102 if (status != 0)
3103 {
3104 ERROR ("network plugin: network_config_add_listen: sockent_server_listen failed.");
3105 sockent_destroy (se);
3106 return (-1);
3107 }
3109 status = sockent_add (se);
3110 if (status != 0)
3111 {
3112 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
3113 sockent_destroy (se);
3114 return (-1);
3115 }
3117 return (0);
3118 } /* }}} int network_config_add_listen */
3120 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
3121 {
3122 sockent_t *se;
3123 int status;
3124 int i;
3126 if ((ci->values_num < 1) || (ci->values_num > 2)
3127 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3128 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3129 {
3130 ERROR ("network plugin: The `%s' config option needs "
3131 "one or two string arguments.", ci->key);
3132 return (-1);
3133 }
3135 se = sockent_create (SOCKENT_TYPE_CLIENT);
3136 if (se == NULL)
3137 {
3138 ERROR ("network plugin: sockent_create failed.");
3139 return (-1);
3140 }
3142 se->node = strdup (ci->values[0].value.string);
3143 if (ci->values_num >= 2)
3144 se->service = strdup (ci->values[1].value.string);
3146 for (i = 0; i < ci->children_num; i++)
3147 {
3148 oconfig_item_t *child = ci->children + i;
3150 #if HAVE_LIBGCRYPT
3151 if (strcasecmp ("Username", child->key) == 0)
3152 cf_util_get_string (child, &se->data.client.username);
3153 else if (strcasecmp ("Password", child->key) == 0)
3154 cf_util_get_string (child, &se->data.client.password);
3155 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3156 network_config_set_security_level (child,
3157 &se->data.client.security_level);
3158 else
3159 #endif /* HAVE_LIBGCRYPT */
3160 if (strcasecmp ("Interface", child->key) == 0)
3161 network_config_set_interface (child, &se->interface);
3162 else if (strcasecmp ("ResolveInterval", child->key) == 0)
3163 cf_util_get_cdtime(child, &se->data.client.resolve_interval);
3164 else
3165 {
3166 WARNING ("network plugin: Option `%s' is not allowed here.",
3167 child->key);
3168 }
3169 }
3171 #if HAVE_LIBGCRYPT
3172 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
3173 && ((se->data.client.username == NULL)
3174 || (se->data.client.password == NULL)))
3175 {
3176 ERROR ("network plugin: A security level higher than `none' was "
3177 "requested, but no Username or Password option was given. "
3178 "Cowardly refusing to open this socket!");
3179 sockent_destroy (se);
3180 return (-1);
3181 }
3182 #endif /* HAVE_LIBGCRYPT */
3184 status = sockent_init_crypto (se);
3185 if (status != 0)
3186 {
3187 ERROR ("network plugin: network_config_add_server: sockent_init_crypto() failed.");
3188 sockent_destroy (se);
3189 return (-1);
3190 }
3192 /* No call to sockent_client_connect() here -- it is called from
3193 * network_send_buffer_plain(). */
3195 status = sockent_add (se);
3196 if (status != 0)
3197 {
3198 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
3199 sockent_destroy (se);
3200 return (-1);
3201 }
3203 return (0);
3204 } /* }}} int network_config_add_server */
3206 static int network_config (oconfig_item_t *ci) /* {{{ */
3207 {
3208 int i;
3210 /* The options need to be applied first */
3211 for (i = 0; i < ci->children_num; i++)
3212 {
3213 oconfig_item_t *child = ci->children + i;
3214 if (strcasecmp ("TimeToLive", child->key) == 0)
3215 network_config_set_ttl (child);
3216 }
3218 for (i = 0; i < ci->children_num; i++)
3219 {
3220 oconfig_item_t *child = ci->children + i;
3222 if (strcasecmp ("Listen", child->key) == 0)
3223 network_config_add_listen (child);
3224 else if (strcasecmp ("Server", child->key) == 0)
3225 network_config_add_server (child);
3226 else if (strcasecmp ("TimeToLive", child->key) == 0) {
3227 /* Handled earlier */
3228 }
3229 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
3230 network_config_set_buffer_size (child);
3231 else if (strcasecmp ("Forward", child->key) == 0)
3232 cf_util_get_boolean (child, &network_config_forward);
3233 else if (strcasecmp ("ReportStats", child->key) == 0)
3234 cf_util_get_boolean (child, &network_config_stats);
3235 else
3236 {
3237 WARNING ("network plugin: Option `%s' is not allowed here.",
3238 child->key);
3239 }
3240 }
3242 return (0);
3243 } /* }}} int network_config */
3245 static int network_notification (const notification_t *n,
3246 user_data_t __attribute__((unused)) *user_data)
3247 {
3248 char buffer[network_config_packet_size];
3249 char *buffer_ptr = buffer;
3250 int buffer_free = sizeof (buffer);
3251 int status;
3253 if (!check_send_notify_okay (n))
3254 return (0);
3256 memset (buffer, 0, sizeof (buffer));
3258 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME_HR,
3259 (uint64_t) n->time);
3260 if (status != 0)
3261 return (-1);
3263 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
3264 (uint64_t) n->severity);
3265 if (status != 0)
3266 return (-1);
3268 if (strlen (n->host) > 0)
3269 {
3270 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
3271 n->host, strlen (n->host));
3272 if (status != 0)
3273 return (-1);
3274 }
3276 if (strlen (n->plugin) > 0)
3277 {
3278 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
3279 n->plugin, strlen (n->plugin));
3280 if (status != 0)
3281 return (-1);
3282 }
3284 if (strlen (n->plugin_instance) > 0)
3285 {
3286 status = write_part_string (&buffer_ptr, &buffer_free,
3287 TYPE_PLUGIN_INSTANCE,
3288 n->plugin_instance, strlen (n->plugin_instance));
3289 if (status != 0)
3290 return (-1);
3291 }
3293 if (strlen (n->type) > 0)
3294 {
3295 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3296 n->type, strlen (n->type));
3297 if (status != 0)
3298 return (-1);
3299 }
3301 if (strlen (n->type_instance) > 0)
3302 {
3303 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3304 n->type_instance, strlen (n->type_instance));
3305 if (status != 0)
3306 return (-1);
3307 }
3309 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3310 n->message, strlen (n->message));
3311 if (status != 0)
3312 return (-1);
3314 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3316 return (0);
3317 } /* int network_notification */
3319 static int network_shutdown (void)
3320 {
3321 sockent_t *se;
3323 listen_loop++;
3325 /* Kill the listening thread */
3326 if (receive_thread_running != 0)
3327 {
3328 INFO ("network plugin: Stopping receive thread.");
3329 pthread_kill (receive_thread_id, SIGTERM);
3330 pthread_join (receive_thread_id, NULL /* no return value */);
3331 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3332 receive_thread_running = 0;
3333 }
3335 /* Shutdown the dispatching thread */
3336 if (dispatch_thread_running != 0)
3337 {
3338 INFO ("network plugin: Stopping dispatch thread.");
3339 pthread_mutex_lock (&receive_list_lock);
3340 pthread_cond_broadcast (&receive_list_cond);
3341 pthread_mutex_unlock (&receive_list_lock);
3342 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3343 dispatch_thread_running = 0;
3344 }
3346 sockent_destroy (listen_sockets);
3348 if (send_buffer_fill > 0)
3349 flush_buffer ();
3351 sfree (send_buffer);
3353 for (se = sending_sockets; se != NULL; se = se->next)
3354 sockent_client_disconnect (se);
3355 sockent_destroy (sending_sockets);
3357 plugin_unregister_config ("network");
3358 plugin_unregister_init ("network");
3359 plugin_unregister_write ("network");
3360 plugin_unregister_shutdown ("network");
3362 return (0);
3363 } /* int network_shutdown */
3365 static int network_stats_read (void) /* {{{ */
3366 {
3367 derive_t copy_octets_rx;
3368 derive_t copy_octets_tx;
3369 derive_t copy_packets_rx;
3370 derive_t copy_packets_tx;
3371 derive_t copy_values_dispatched;
3372 derive_t copy_values_not_dispatched;
3373 derive_t copy_values_sent;
3374 derive_t copy_values_not_sent;
3375 derive_t copy_receive_list_length;
3376 value_list_t vl = VALUE_LIST_INIT;
3377 value_t values[2];
3379 copy_octets_rx = stats_octets_rx;
3380 copy_octets_tx = stats_octets_tx;
3381 copy_packets_rx = stats_packets_rx;
3382 copy_packets_tx = stats_packets_tx;
3383 copy_values_dispatched = stats_values_dispatched;
3384 copy_values_not_dispatched = stats_values_not_dispatched;
3385 copy_values_sent = stats_values_sent;
3386 copy_values_not_sent = stats_values_not_sent;
3387 copy_receive_list_length = receive_list_length;
3389 /* Initialize `vl' */
3390 vl.values = values;
3391 vl.values_len = 2;
3392 vl.time = 0;
3393 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3394 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3396 /* Octets received / sent */
3397 vl.values[0].derive = (derive_t) copy_octets_rx;
3398 vl.values[1].derive = (derive_t) copy_octets_tx;
3399 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3400 plugin_dispatch_values (&vl);
3402 /* Packets received / send */
3403 vl.values[0].derive = (derive_t) copy_packets_rx;
3404 vl.values[1].derive = (derive_t) copy_packets_tx;
3405 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3406 plugin_dispatch_values (&vl);
3408 /* Values (not) dispatched and (not) send */
3409 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3410 vl.values_len = 1;
3412 vl.values[0].derive = (derive_t) copy_values_dispatched;
3413 sstrncpy (vl.type_instance, "dispatch-accepted",
3414 sizeof (vl.type_instance));
3415 plugin_dispatch_values (&vl);
3417 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3418 sstrncpy (vl.type_instance, "dispatch-rejected",
3419 sizeof (vl.type_instance));
3420 plugin_dispatch_values (&vl);
3422 vl.values[0].derive = (derive_t) copy_values_sent;
3423 sstrncpy (vl.type_instance, "send-accepted",
3424 sizeof (vl.type_instance));
3425 plugin_dispatch_values (&vl);
3427 vl.values[0].derive = (derive_t) copy_values_not_sent;
3428 sstrncpy (vl.type_instance, "send-rejected",
3429 sizeof (vl.type_instance));
3430 plugin_dispatch_values (&vl);
3432 /* Receive queue length */
3433 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3434 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3435 vl.type_instance[0] = 0;
3436 plugin_dispatch_values (&vl);
3438 return (0);
3439 } /* }}} int network_stats_read */
3441 static int network_init (void)
3442 {
3443 static _Bool have_init = 0;
3445 /* Check if we were already initialized. If so, just return - there's
3446 * nothing more to do (for now, that is). */
3447 if (have_init)
3448 return (0);
3449 have_init = 1;
3451 #if HAVE_LIBGCRYPT
3452 network_init_gcrypt ();
3453 #endif
3455 if (network_config_stats)
3456 plugin_register_read ("network", network_stats_read);
3458 plugin_register_shutdown ("network", network_shutdown);
3460 send_buffer = malloc (network_config_packet_size);
3461 if (send_buffer == NULL)
3462 {
3463 ERROR ("network plugin: malloc failed.");
3464 return (-1);
3465 }
3466 network_init_buffer ();
3468 /* setup socket(s) and so on */
3469 if (sending_sockets != NULL)
3470 {
3471 plugin_register_write ("network", network_write,
3472 /* user_data = */ NULL);
3473 plugin_register_notification ("network", network_notification,
3474 /* user_data = */ NULL);
3475 }
3477 /* If no threads need to be started, return here. */
3478 if ((listen_sockets_num == 0)
3479 || ((dispatch_thread_running != 0)
3480 && (receive_thread_running != 0)))
3481 return (0);
3483 if (dispatch_thread_running == 0)
3484 {
3485 int status;
3486 status = plugin_thread_create (&dispatch_thread_id,
3487 NULL /* no attributes */,
3488 dispatch_thread,
3489 NULL /* no argument */);
3490 if (status != 0)
3491 {
3492 char errbuf[1024];
3493 ERROR ("network: pthread_create failed: %s",
3494 sstrerror (errno, errbuf,
3495 sizeof (errbuf)));
3496 }
3497 else
3498 {
3499 dispatch_thread_running = 1;
3500 }
3501 }
3503 if (receive_thread_running == 0)
3504 {
3505 int status;
3506 status = plugin_thread_create (&receive_thread_id,
3507 NULL /* no attributes */,
3508 receive_thread,
3509 NULL /* no argument */);
3510 if (status != 0)
3511 {
3512 char errbuf[1024];
3513 ERROR ("network: pthread_create failed: %s",
3514 sstrerror (errno, errbuf,
3515 sizeof (errbuf)));
3516 }
3517 else
3518 {
3519 receive_thread_running = 1;
3520 }
3521 }
3523 return (0);
3524 } /* int network_init */
3526 /*
3527 * The flush option of the network plugin cannot flush individual identifiers.
3528 * All the values are added to a buffer and sent when the buffer is full, the
3529 * requested value may or may not be in there, it's not worth finding out. We
3530 * just send the buffer if `flush' is called - if the requested value was in
3531 * there, good. If not, well, then there is nothing to flush.. -octo
3532 */
3533 static int network_flush (cdtime_t timeout,
3534 __attribute__((unused)) const char *identifier,
3535 __attribute__((unused)) user_data_t *user_data)
3536 {
3537 pthread_mutex_lock (&send_buffer_lock);
3539 if (send_buffer_fill > 0)
3540 {
3541 if (timeout > 0)
3542 {
3543 cdtime_t now = cdtime ();
3544 if ((send_buffer_last_update + timeout) > now)
3545 {
3546 pthread_mutex_unlock (&send_buffer_lock);
3547 return (0);
3548 }
3549 }
3550 flush_buffer ();
3551 }
3552 pthread_mutex_unlock (&send_buffer_lock);
3554 return (0);
3555 } /* int network_flush */
3557 void module_register (void)
3558 {
3559 plugin_register_complex_config ("network", network_config);
3560 plugin_register_init ("network", network_init);
3561 plugin_register_flush ("network", network_flush,
3562 /* user_data = */ NULL);
3563 } /* void module_register */
3565 /* vim: set fdm=marker : */