5a8a88efe388317cd48288ad97e63412b8b6acef
1 /**
2 * collectd - src/network.c
3 * Copyright (C) 2005-2013 Florian octo Forster
4 * Copyright (C) 2009 Aman Gupta
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU Lesser General Public License as published by
8 * the Free Software Foundation; only version 2.1 of the License is
9 * applicable.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 * Authors:
21 * Florian octo Forster <octo at collectd.org>
22 * Aman Gupta <aman at tmm1.net>
23 **/
25 #define _DEFAULT_SOURCE
26 #define _BSD_SOURCE /* For struct ip_mreq */
28 #include "collectd.h"
29 #include "plugin.h"
30 #include "common.h"
31 #include "configfile.h"
32 #include "utils_fbhash.h"
33 #include "utils_cache.h"
34 #include "utils_complain.h"
36 #include "network.h"
38 #if HAVE_NETDB_H
39 # include <netdb.h>
40 #endif
41 #if HAVE_NETINET_IN_H
42 # include <netinet/in.h>
43 #endif
44 #if HAVE_ARPA_INET_H
45 # include <arpa/inet.h>
46 #endif
47 #if HAVE_POLL_H
48 # include <poll.h>
49 #endif
50 #if HAVE_NET_IF_H
51 # include <net/if.h>
52 #endif
54 #if HAVE_LIBGCRYPT
55 # if defined __APPLE__
56 /* default xcode compiler throws warnings even when deprecated functionality
57 * is not used. -Werror breaks the build because of erroneous warnings.
58 * http://stackoverflow.com/questions/10556299/compiler-warnings-with-libgcrypt-v1-5-0/12830209#12830209
59 */
60 # pragma GCC diagnostic ignored "-Wdeprecated-declarations"
61 # endif
62 /* FreeBSD's copy of libgcrypt extends the existing GCRYPT_NO_DEPRECATED
63 * to properly hide all deprecated functionality.
64 * http://svnweb.freebsd.org/ports/head/security/libgcrypt/files/patch-src__gcrypt.h.in
65 */
66 # define GCRYPT_NO_DEPRECATED
67 # include <gcrypt.h>
68 # if defined __APPLE__
69 /* Re enable deprecation warnings */
70 # pragma GCC diagnostic warning "-Wdeprecated-declarations"
71 # endif
72 # if GCRYPT_VERSION_NUMBER < 0x010600
73 GCRY_THREAD_OPTION_PTHREAD_IMPL;
74 # endif
75 #endif
77 #ifndef IPV6_ADD_MEMBERSHIP
78 # ifdef IPV6_JOIN_GROUP
79 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
80 # else
81 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
82 # endif
83 #endif /* !IP_ADD_MEMBERSHIP */
85 /*
86 * Maximum size required for encryption / signing:
87 *
88 * 42 bytes for the encryption header
89 * + 64 bytes for the username
90 * -----------
91 * = 106 bytes
92 */
93 #define BUFF_SIG_SIZE 106
95 /*
96 * Private data types
97 */
98 #define SECURITY_LEVEL_NONE 0
99 #if HAVE_LIBGCRYPT
100 # define SECURITY_LEVEL_SIGN 1
101 # define SECURITY_LEVEL_ENCRYPT 2
102 #endif
103 struct sockent_client
104 {
105 int fd;
106 struct sockaddr_storage *addr;
107 socklen_t addrlen;
108 #if HAVE_LIBGCRYPT
109 int security_level;
110 char *username;
111 char *password;
112 gcry_cipher_hd_t cypher;
113 unsigned char password_hash[32];
114 #endif
115 cdtime_t next_resolve_reconnect;
116 cdtime_t resolve_interval;
117 };
119 struct sockent_server
120 {
121 int *fd;
122 size_t fd_num;
123 #if HAVE_LIBGCRYPT
124 int security_level;
125 char *auth_file;
126 fbhash_t *userdb;
127 gcry_cipher_hd_t cypher;
128 #endif
129 };
131 typedef struct sockent
132 {
133 #define SOCKENT_TYPE_CLIENT 1
134 #define SOCKENT_TYPE_SERVER 2
135 int type;
137 char *node;
138 char *service;
139 int interface;
141 union
142 {
143 struct sockent_client client;
144 struct sockent_server server;
145 } data;
147 struct sockent *next;
148 } sockent_t;
150 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
151 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
152 * +-------+-----------------------+-------------------------------+
153 * ! Ver. ! ! Length !
154 * +-------+-----------------------+-------------------------------+
155 */
156 struct part_header_s
157 {
158 uint16_t type;
159 uint16_t length;
160 };
161 typedef struct part_header_s part_header_t;
163 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
164 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
165 * +-------------------------------+-------------------------------+
166 * ! Type ! Length !
167 * +-------------------------------+-------------------------------+
168 * : (Length - 4) Bytes :
169 * +---------------------------------------------------------------+
170 */
171 struct part_string_s
172 {
173 part_header_t *head;
174 char *value;
175 };
176 typedef struct part_string_s part_string_t;
178 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
179 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
180 * +-------------------------------+-------------------------------+
181 * ! Type ! Length !
182 * +-------------------------------+-------------------------------+
183 * : (Length - 4 == 2 || 4 || 8) Bytes :
184 * +---------------------------------------------------------------+
185 */
186 struct part_number_s
187 {
188 part_header_t *head;
189 uint64_t *value;
190 };
191 typedef struct part_number_s part_number_t;
193 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
194 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
195 * +-------------------------------+-------------------------------+
196 * ! Type ! Length !
197 * +-------------------------------+---------------+---------------+
198 * ! Num of values ! Type0 ! Type1 !
199 * +-------------------------------+---------------+---------------+
200 * ! Value0 !
201 * ! !
202 * +---------------------------------------------------------------+
203 * ! Value1 !
204 * ! !
205 * +---------------------------------------------------------------+
206 */
207 struct part_values_s
208 {
209 part_header_t *head;
210 uint16_t *num_values;
211 uint8_t *values_types;
212 value_t *values;
213 };
214 typedef struct part_values_s part_values_t;
216 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
217 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
218 * +-------------------------------+-------------------------------+
219 * ! Type ! Length !
220 * +-------------------------------+-------------------------------+
221 * ! Hash (Bits 0 - 31) !
222 * : : :
223 * ! Hash (Bits 224 - 255) !
224 * +---------------------------------------------------------------+
225 */
226 /* Minimum size */
227 #define PART_SIGNATURE_SHA256_SIZE 36
228 struct part_signature_sha256_s
229 {
230 part_header_t head;
231 unsigned char hash[32];
232 char *username;
233 };
234 typedef struct part_signature_sha256_s part_signature_sha256_t;
236 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
237 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
238 * +-------------------------------+-------------------------------+
239 * ! Type ! Length !
240 * +-------------------------------+-------------------------------+
241 * ! Original length ! Padding (0 - 15 bytes) !
242 * +-------------------------------+-------------------------------+
243 * ! Hash (Bits 0 - 31) !
244 * : : :
245 * ! Hash (Bits 128 - 159) !
246 * +---------------------------------------------------------------+
247 */
248 /* Minimum size */
249 #define PART_ENCRYPTION_AES256_SIZE 42
250 struct part_encryption_aes256_s
251 {
252 part_header_t head;
253 uint16_t username_length;
254 char *username;
255 unsigned char iv[16];
256 /* <encrypted> */
257 unsigned char hash[20];
258 /* <payload /> */
259 /* </encrypted> */
260 };
261 typedef struct part_encryption_aes256_s part_encryption_aes256_t;
263 struct receive_list_entry_s
264 {
265 char *data;
266 int data_len;
267 int fd;
268 struct receive_list_entry_s *next;
269 };
270 typedef struct receive_list_entry_s receive_list_entry_t;
272 /*
273 * Private variables
274 */
275 static int network_config_ttl = 0;
276 /* Ethernet - (IPv6 + UDP) = 1500 - (40 + 8) = 1452 */
277 static size_t network_config_packet_size = 1452;
278 static _Bool network_config_forward = 0;
279 static _Bool network_config_stats = 0;
281 static sockent_t *sending_sockets = NULL;
283 static receive_list_entry_t *receive_list_head = NULL;
284 static receive_list_entry_t *receive_list_tail = NULL;
285 static pthread_mutex_t receive_list_lock = PTHREAD_MUTEX_INITIALIZER;
286 static pthread_cond_t receive_list_cond = PTHREAD_COND_INITIALIZER;
287 static uint64_t receive_list_length = 0;
289 static sockent_t *listen_sockets = NULL;
290 static struct pollfd *listen_sockets_pollfd = NULL;
291 static size_t listen_sockets_num = 0;
293 /* The receive and dispatch threads will run as long as `listen_loop' is set to
294 * zero. */
295 static int listen_loop = 0;
296 static int receive_thread_running = 0;
297 static pthread_t receive_thread_id;
298 static int dispatch_thread_running = 0;
299 static pthread_t dispatch_thread_id;
301 /* Buffer in which to-be-sent network packets are constructed. */
302 static char *send_buffer;
303 static char *send_buffer_ptr;
304 static int send_buffer_fill;
305 static cdtime_t send_buffer_last_update;
306 static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
307 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
309 /* XXX: These counters are incremented from one place only. The spot in which
310 * the values are incremented is either only reachable by one thread (the
311 * dispatch thread, for example) or locked by some lock (send_buffer_lock for
312 * example). Only if neither is true, the stats_lock is acquired. The counters
313 * are always read without holding a lock in the hope that writing 8 bytes to
314 * memory is an atomic operation. */
315 static derive_t stats_octets_rx = 0;
316 static derive_t stats_octets_tx = 0;
317 static derive_t stats_packets_rx = 0;
318 static derive_t stats_packets_tx = 0;
319 static derive_t stats_values_dispatched = 0;
320 static derive_t stats_values_not_dispatched = 0;
321 static derive_t stats_values_sent = 0;
322 static derive_t stats_values_not_sent = 0;
323 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
325 /*
326 * Private functions
327 */
328 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
329 {
330 uint64_t time_sent = 0;
331 int status;
333 status = uc_meta_data_get_unsigned_int (vl,
334 "network:time_sent", &time_sent);
336 /* This is a value we already sent. Don't allow it to be received again in
337 * order to avoid looping. */
338 if ((status == 0) && (time_sent >= ((uint64_t) vl->time)))
339 return (0);
341 return (1);
342 } /* }}} _Bool check_receive_okay */
344 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
345 {
346 _Bool received = 0;
347 int status;
349 if (network_config_forward)
350 return (1);
352 if (vl->meta == NULL)
353 return (1);
355 status = meta_data_get_boolean (vl->meta, "network:received", &received);
356 if (status == -ENOENT)
357 return (1);
358 else if (status != 0)
359 {
360 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
361 "with status %i.", status);
362 return (1);
363 }
365 /* By default, only *send* value lists that were not *received* by the
366 * network plugin. */
367 return (!received);
368 } /* }}} _Bool check_send_okay */
370 static _Bool check_notify_received (const notification_t *n) /* {{{ */
371 {
372 notification_meta_t *ptr;
374 for (ptr = n->meta; ptr != NULL; ptr = ptr->next)
375 if ((strcmp ("network:received", ptr->name) == 0)
376 && (ptr->type == NM_TYPE_BOOLEAN))
377 return ((_Bool) ptr->nm_value.nm_boolean);
379 return (0);
380 } /* }}} _Bool check_notify_received */
382 static _Bool check_send_notify_okay (const notification_t *n) /* {{{ */
383 {
384 static c_complain_t complain_forwarding = C_COMPLAIN_INIT_STATIC;
385 _Bool received = 0;
387 if (n->meta == NULL)
388 return (1);
390 received = check_notify_received (n);
392 if (network_config_forward && received)
393 {
394 c_complain_once (LOG_ERR, &complain_forwarding,
395 "network plugin: A notification has been received via the network "
396 "and forwarding is enabled. Forwarding of notifications is currently "
397 "not supported, because there is not loop-deteciton available. "
398 "Please contact the collectd mailing list if you need this "
399 "feature.");
400 }
402 /* By default, only *send* value lists that were not *received* by the
403 * network plugin. */
404 return (!received);
405 } /* }}} _Bool check_send_notify_okay */
407 static int network_dispatch_values (value_list_t *vl, /* {{{ */
408 const char *username)
409 {
410 int status;
412 if ((vl->time == 0)
413 || (strlen (vl->host) == 0)
414 || (strlen (vl->plugin) == 0)
415 || (strlen (vl->type) == 0))
416 return (-EINVAL);
418 if (!check_receive_okay (vl))
419 {
420 #if COLLECT_DEBUG
421 char name[6*DATA_MAX_NAME_LEN];
422 FORMAT_VL (name, sizeof (name), vl);
423 name[sizeof (name) - 1] = 0;
424 DEBUG ("network plugin: network_dispatch_values: "
425 "NOT dispatching %s.", name);
426 #endif
427 stats_values_not_dispatched++;
428 return (0);
429 }
431 assert (vl->meta == NULL);
433 vl->meta = meta_data_create ();
434 if (vl->meta == NULL)
435 {
436 ERROR ("network plugin: meta_data_create failed.");
437 return (-ENOMEM);
438 }
440 status = meta_data_add_boolean (vl->meta, "network:received", 1);
441 if (status != 0)
442 {
443 ERROR ("network plugin: meta_data_add_boolean failed.");
444 meta_data_destroy (vl->meta);
445 vl->meta = NULL;
446 return (status);
447 }
449 if (username != NULL)
450 {
451 status = meta_data_add_string (vl->meta, "network:username", username);
452 if (status != 0)
453 {
454 ERROR ("network plugin: meta_data_add_string failed.");
455 meta_data_destroy (vl->meta);
456 vl->meta = NULL;
457 return (status);
458 }
459 }
461 plugin_dispatch_values (vl);
462 stats_values_dispatched++;
464 meta_data_destroy (vl->meta);
465 vl->meta = NULL;
467 return (0);
468 } /* }}} int network_dispatch_values */
470 static int network_dispatch_notification (notification_t *n) /* {{{ */
471 {
472 int status;
474 assert (n->meta == NULL);
476 status = plugin_notification_meta_add_boolean (n, "network:received", 1);
477 if (status != 0)
478 {
479 ERROR ("network plugin: plugin_notification_meta_add_boolean failed.");
480 plugin_notification_meta_free (n->meta);
481 n->meta = NULL;
482 return (status);
483 }
485 status = plugin_dispatch_notification (n);
487 plugin_notification_meta_free (n->meta);
488 n->meta = NULL;
490 return (status);
491 } /* }}} int network_dispatch_notification */
493 #if HAVE_LIBGCRYPT
494 static void network_init_gcrypt (void) /* {{{ */
495 {
496 gcry_error_t err;
498 /* http://lists.gnupg.org/pipermail/gcrypt-devel/2003-August/000458.html
499 * Because you can't know in a library whether another library has
500 * already initialized the library */
501 if (gcry_control (GCRYCTL_ANY_INITIALIZATION_P))
502 return;
504 /* http://www.gnupg.org/documentation/manuals/gcrypt/Multi_002dThreading.html
505 * To ensure thread-safety, it's important to set GCRYCTL_SET_THREAD_CBS
506 * *before* initalizing Libgcrypt with gcry_check_version(), which itself must
507 * be called before any other gcry_* function. GCRYCTL_ANY_INITIALIZATION_P
508 * above doesn't count, as it doesn't implicitly initalize Libgcrypt.
509 *
510 * tl;dr: keep all these gry_* statements in this exact order please. */
511 # if GCRYPT_VERSION_NUMBER < 0x010600
512 err = gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
513 if (err)
514 {
515 ERROR ("network plugin: gcry_control (GCRYCTL_SET_THREAD_CBS) failed: %s", gcry_strerror (err));
516 abort ();
517 }
518 # endif
520 gcry_check_version (NULL);
522 err = gcry_control (GCRYCTL_INIT_SECMEM, 32768);
523 if (err)
524 {
525 ERROR ("network plugin: gcry_control (GCRYCTL_INIT_SECMEM) failed: %s", gcry_strerror (err));
526 abort ();
527 }
529 gcry_control (GCRYCTL_INITIALIZATION_FINISHED);
530 } /* }}} void network_init_gcrypt */
532 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
533 const void *iv, size_t iv_size, const char *username)
534 {
535 gcry_error_t err;
536 gcry_cipher_hd_t *cyper_ptr;
537 unsigned char password_hash[32];
539 if (se->type == SOCKENT_TYPE_CLIENT)
540 {
541 cyper_ptr = &se->data.client.cypher;
542 memcpy (password_hash, se->data.client.password_hash,
543 sizeof (password_hash));
544 }
545 else
546 {
547 char *secret;
549 cyper_ptr = &se->data.server.cypher;
551 if (username == NULL)
552 return (NULL);
554 secret = fbh_get (se->data.server.userdb, username);
555 if (secret == NULL)
556 return (NULL);
558 gcry_md_hash_buffer (GCRY_MD_SHA256,
559 password_hash,
560 secret, strlen (secret));
562 sfree (secret);
563 }
565 if (*cyper_ptr == NULL)
566 {
567 err = gcry_cipher_open (cyper_ptr,
568 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
569 if (err != 0)
570 {
571 ERROR ("network plugin: gcry_cipher_open returned: %s",
572 gcry_strerror (err));
573 *cyper_ptr = NULL;
574 return (NULL);
575 }
576 }
577 else
578 {
579 gcry_cipher_reset (*cyper_ptr);
580 }
581 assert (*cyper_ptr != NULL);
583 err = gcry_cipher_setkey (*cyper_ptr,
584 password_hash, sizeof (password_hash));
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 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
595 if (err != 0)
596 {
597 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
598 gcry_strerror (err));
599 gcry_cipher_close (*cyper_ptr);
600 *cyper_ptr = NULL;
601 return (NULL);
602 }
604 return (*cyper_ptr);
605 } /* }}} int network_get_aes256_cypher */
606 #endif /* HAVE_LIBGCRYPT */
608 static int write_part_values (char **ret_buffer, size_t *ret_buffer_len,
609 const data_set_t *ds, const value_list_t *vl)
610 {
611 char *packet_ptr;
612 size_t packet_len;
613 int num_values;
615 part_header_t pkg_ph;
616 uint16_t pkg_num_values;
617 uint8_t *pkg_values_types;
618 value_t *pkg_values;
620 size_t offset;
621 int i;
623 num_values = vl->values_len;
624 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
625 + (num_values * sizeof (uint8_t))
626 + (num_values * sizeof (value_t));
628 if (*ret_buffer_len < packet_len)
629 return (-1);
631 pkg_values_types = malloc (num_values * sizeof (*pkg_values_types));
632 if (pkg_values_types == NULL)
633 {
634 ERROR ("network plugin: write_part_values: malloc failed.");
635 return (-1);
636 }
638 pkg_values = malloc (num_values * sizeof (*pkg_values));
639 if (pkg_values == NULL)
640 {
641 free (pkg_values_types);
642 ERROR ("network plugin: write_part_values: malloc failed.");
643 return (-1);
644 }
646 pkg_ph.type = htons (TYPE_VALUES);
647 pkg_ph.length = htons (packet_len);
649 pkg_num_values = htons ((uint16_t) vl->values_len);
651 for (i = 0; i < num_values; i++)
652 {
653 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
654 switch (ds->ds[i].type)
655 {
656 case DS_TYPE_COUNTER:
657 pkg_values[i].counter = htonll (vl->values[i].counter);
658 break;
660 case DS_TYPE_GAUGE:
661 pkg_values[i].gauge = htond (vl->values[i].gauge);
662 break;
664 case DS_TYPE_DERIVE:
665 pkg_values[i].derive = htonll (vl->values[i].derive);
666 break;
668 case DS_TYPE_ABSOLUTE:
669 pkg_values[i].absolute = htonll (vl->values[i].absolute);
670 break;
672 default:
673 free (pkg_values_types);
674 free (pkg_values);
675 ERROR ("network plugin: write_part_values: "
676 "Unknown data source type: %i",
677 ds->ds[i].type);
678 return (-1);
679 } /* switch (ds->ds[i].type) */
680 } /* for (num_values) */
682 /*
683 * Use `memcpy' to write everything to the buffer, because the pointer
684 * may be unaligned and some architectures, such as SPARC, can't handle
685 * that.
686 */
687 packet_ptr = *ret_buffer;
688 offset = 0;
689 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
690 offset += sizeof (pkg_ph);
691 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
692 offset += sizeof (pkg_num_values);
693 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
694 offset += num_values * sizeof (uint8_t);
695 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
696 offset += num_values * sizeof (value_t);
698 assert (offset == packet_len);
700 *ret_buffer = packet_ptr + packet_len;
701 *ret_buffer_len -= packet_len;
703 free (pkg_values_types);
704 free (pkg_values);
706 return (0);
707 } /* int write_part_values */
709 static int write_part_number (char **ret_buffer, size_t *ret_buffer_len,
710 int type, uint64_t value)
711 {
712 char *packet_ptr;
713 size_t packet_len;
715 part_header_t pkg_head;
716 uint64_t pkg_value;
718 size_t offset;
720 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
722 if (*ret_buffer_len < packet_len)
723 return (-1);
725 pkg_head.type = htons (type);
726 pkg_head.length = htons (packet_len);
727 pkg_value = htonll (value);
729 packet_ptr = *ret_buffer;
730 offset = 0;
731 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
732 offset += sizeof (pkg_head);
733 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
734 offset += sizeof (pkg_value);
736 assert (offset == packet_len);
738 *ret_buffer = packet_ptr + packet_len;
739 *ret_buffer_len -= packet_len;
741 return (0);
742 } /* int write_part_number */
744 static int write_part_string (char **ret_buffer, size_t *ret_buffer_len,
745 int type, const char *str, size_t str_len)
746 {
747 char *buffer;
748 size_t buffer_len;
750 uint16_t pkg_type;
751 uint16_t pkg_length;
753 size_t offset;
755 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
756 if (*ret_buffer_len < buffer_len)
757 return (-1);
759 pkg_type = htons (type);
760 pkg_length = htons (buffer_len);
762 buffer = *ret_buffer;
763 offset = 0;
764 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
765 offset += sizeof (pkg_type);
766 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
767 offset += sizeof (pkg_length);
768 memcpy (buffer + offset, str, str_len);
769 offset += str_len;
770 memset (buffer + offset, '\0', 1);
771 offset += 1;
773 assert (offset == buffer_len);
775 *ret_buffer = buffer + buffer_len;
776 *ret_buffer_len -= buffer_len;
778 return (0);
779 } /* int write_part_string */
781 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
782 value_t **ret_values, size_t *ret_num_values)
783 {
784 char *buffer = *ret_buffer;
785 size_t buffer_len = *ret_buffer_len;
787 uint16_t tmp16;
788 size_t exp_size;
789 size_t i;
791 uint16_t pkg_length;
792 uint16_t pkg_type;
793 size_t pkg_numval;
795 uint8_t *pkg_types;
796 value_t *pkg_values;
798 if (buffer_len < 15)
799 {
800 NOTICE ("network plugin: packet is too short: "
801 "buffer_len = %zu", buffer_len);
802 return (-1);
803 }
805 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
806 buffer += sizeof (tmp16);
807 pkg_type = ntohs (tmp16);
809 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
810 buffer += sizeof (tmp16);
811 pkg_length = ntohs (tmp16);
813 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
814 buffer += sizeof (tmp16);
815 pkg_numval = (size_t) ntohs (tmp16);
817 assert (pkg_type == TYPE_VALUES);
819 exp_size = 3 * sizeof (uint16_t)
820 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
821 if (buffer_len < exp_size)
822 {
823 WARNING ("network plugin: parse_part_values: "
824 "Packet too short: "
825 "Chunk of size %zu expected, "
826 "but buffer has only %zu bytes left.",
827 exp_size, buffer_len);
828 return (-1);
829 }
830 assert (pkg_numval <= ((buffer_len - 6) / 9));
832 if (pkg_length != exp_size)
833 {
834 WARNING ("network plugin: parse_part_values: "
835 "Length and number of values "
836 "in the packet don't match.");
837 return (-1);
838 }
840 pkg_types = calloc (pkg_numval, sizeof (*pkg_types));
841 pkg_values = calloc (pkg_numval, sizeof (*pkg_values));
842 if ((pkg_types == NULL) || (pkg_values == NULL))
843 {
844 sfree (pkg_types);
845 sfree (pkg_values);
846 ERROR ("network plugin: parse_part_values: calloc failed.");
847 return (-1);
848 }
850 memcpy (pkg_types, buffer, pkg_numval * sizeof (*pkg_types));
851 buffer += pkg_numval * sizeof (*pkg_types);
852 memcpy (pkg_values, buffer, pkg_numval * sizeof (*pkg_values));
853 buffer += pkg_numval * sizeof (*pkg_values);
855 for (i = 0; i < pkg_numval; i++)
856 {
857 switch (pkg_types[i])
858 {
859 case DS_TYPE_COUNTER:
860 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
861 break;
863 case DS_TYPE_GAUGE:
864 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
865 break;
867 case DS_TYPE_DERIVE:
868 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
869 break;
871 case DS_TYPE_ABSOLUTE:
872 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
873 break;
875 default:
876 NOTICE ("network plugin: parse_part_values: "
877 "Don't know how to handle data source type %"PRIu8,
878 pkg_types[i]);
879 sfree (pkg_types);
880 sfree (pkg_values);
881 return (-1);
882 } /* switch (pkg_types[i]) */
883 }
885 *ret_buffer = buffer;
886 *ret_buffer_len = buffer_len - pkg_length;
887 *ret_num_values = pkg_numval;
888 *ret_values = pkg_values;
890 sfree (pkg_types);
892 return (0);
893 } /* int parse_part_values */
895 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
896 uint64_t *value)
897 {
898 char *buffer = *ret_buffer;
899 size_t buffer_len = *ret_buffer_len;
901 uint16_t tmp16;
902 uint64_t tmp64;
903 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
905 uint16_t pkg_length;
907 if (buffer_len < exp_size)
908 {
909 WARNING ("network plugin: parse_part_number: "
910 "Packet too short: "
911 "Chunk of size %zu expected, "
912 "but buffer has only %zu bytes left.",
913 exp_size, buffer_len);
914 return (-1);
915 }
917 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
918 buffer += sizeof (tmp16);
919 /* pkg_type = ntohs (tmp16); */
921 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
922 buffer += sizeof (tmp16);
923 pkg_length = ntohs (tmp16);
925 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
926 buffer += sizeof (tmp64);
927 *value = ntohll (tmp64);
929 *ret_buffer = buffer;
930 *ret_buffer_len = buffer_len - pkg_length;
932 return (0);
933 } /* int parse_part_number */
935 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
936 char *output, size_t const output_len)
937 {
938 char *buffer = *ret_buffer;
939 size_t buffer_len = *ret_buffer_len;
941 uint16_t tmp16;
942 size_t const header_size = 2 * sizeof (uint16_t);
944 uint16_t pkg_length;
945 size_t payload_size;
947 if (output_len == 0)
948 return (EINVAL);
950 if (buffer_len < header_size)
951 {
952 WARNING ("network plugin: parse_part_string: "
953 "Packet too short: "
954 "Chunk of at least size %zu expected, "
955 "but buffer has only %zu bytes left.",
956 header_size, buffer_len);
957 return (-1);
958 }
960 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
961 buffer += sizeof (tmp16);
962 /* pkg_type = ntohs (tmp16); */
964 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
965 buffer += sizeof (tmp16);
966 pkg_length = ntohs (tmp16);
967 payload_size = ((size_t) pkg_length) - header_size;
969 /* Check that packet fits in the input buffer */
970 if (pkg_length > buffer_len)
971 {
972 WARNING ("network plugin: parse_part_string: "
973 "Packet too big: "
974 "Chunk of size %"PRIu16" received, "
975 "but buffer has only %zu bytes left.",
976 pkg_length, buffer_len);
977 return (-1);
978 }
980 /* Check that pkg_length is in the valid range */
981 if (pkg_length <= header_size)
982 {
983 WARNING ("network plugin: parse_part_string: "
984 "Packet too short: "
985 "Header claims this packet is only %hu "
986 "bytes long.", pkg_length);
987 return (-1);
988 }
990 /* Check that the package data fits into the output buffer.
991 * The previous if-statement ensures that:
992 * `pkg_length > header_size' */
993 if (output_len < payload_size)
994 {
995 WARNING ("network plugin: parse_part_string: "
996 "Buffer too small: "
997 "Output buffer holds %zu bytes, "
998 "which is too small to hold the received "
999 "%zu byte string.",
1000 output_len, payload_size);
1001 return (-1);
1002 }
1004 /* All sanity checks successfull, let's copy the data over */
1005 memcpy ((void *) output, (void *) buffer, payload_size);
1006 buffer += payload_size;
1008 /* For some very weird reason '\0' doesn't do the trick on SPARC in
1009 * this statement. */
1010 if (output[payload_size - 1] != 0)
1011 {
1012 WARNING ("network plugin: parse_part_string: "
1013 "Received string does not end "
1014 "with a NULL-byte.");
1015 return (-1);
1016 }
1018 *ret_buffer = buffer;
1019 *ret_buffer_len = buffer_len - pkg_length;
1021 return (0);
1022 } /* int parse_part_string */
1024 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
1025 * parse_packet and vice versa. */
1026 #define PP_SIGNED 0x01
1027 #define PP_ENCRYPTED 0x02
1028 static int parse_packet (sockent_t *se,
1029 void *buffer, size_t buffer_size, int flags,
1030 const char *username);
1032 #define BUFFER_READ(p,s) do { \
1033 memcpy ((p), buffer + buffer_offset, (s)); \
1034 buffer_offset += (s); \
1035 } while (0)
1037 #if HAVE_LIBGCRYPT
1038 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1039 void **ret_buffer, size_t *ret_buffer_len, int flags)
1040 {
1041 static c_complain_t complain_no_users = C_COMPLAIN_INIT_STATIC;
1043 char *buffer;
1044 size_t buffer_len;
1045 size_t buffer_offset;
1047 size_t username_len;
1048 char *secret;
1050 part_signature_sha256_t pss;
1051 uint16_t pss_head_length;
1052 char hash[sizeof (pss.hash)];
1054 gcry_md_hd_t hd;
1055 gcry_error_t err;
1056 unsigned char *hash_ptr;
1058 buffer = *ret_buffer;
1059 buffer_len = *ret_buffer_len;
1060 buffer_offset = 0;
1062 if (se->data.server.userdb == NULL)
1063 {
1064 c_complain (LOG_NOTICE, &complain_no_users,
1065 "network plugin: Received signed network packet but can't verify it "
1066 "because no user DB has been configured. Will accept it.");
1067 return (0);
1068 }
1070 /* Check if the buffer has enough data for this structure. */
1071 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
1072 return (-ENOMEM);
1074 /* Read type and length header */
1075 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1076 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1077 pss_head_length = ntohs (pss.head.length);
1079 /* Check if the `pss_head_length' is within bounds. */
1080 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
1081 || (pss_head_length > buffer_len))
1082 {
1083 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
1084 return (-1);
1085 }
1087 /* Copy the hash. */
1088 BUFFER_READ (pss.hash, sizeof (pss.hash));
1090 /* Calculate username length (without null byte) and allocate memory */
1091 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
1092 pss.username = malloc (username_len + 1);
1093 if (pss.username == NULL)
1094 return (-ENOMEM);
1096 /* Read the username */
1097 BUFFER_READ (pss.username, username_len);
1098 pss.username[username_len] = 0;
1100 assert (buffer_offset == pss_head_length);
1102 /* Query the password */
1103 secret = fbh_get (se->data.server.userdb, pss.username);
1104 if (secret == NULL)
1105 {
1106 ERROR ("network plugin: Unknown user: %s", pss.username);
1107 sfree (pss.username);
1108 return (-ENOENT);
1109 }
1111 /* Create a hash device and check the HMAC */
1112 hd = NULL;
1113 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
1114 if (err != 0)
1115 {
1116 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
1117 gcry_strerror (err));
1118 sfree (secret);
1119 sfree (pss.username);
1120 return (-1);
1121 }
1123 err = gcry_md_setkey (hd, secret, strlen (secret));
1124 if (err != 0)
1125 {
1126 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
1127 gcry_md_close (hd);
1128 sfree (secret);
1129 sfree (pss.username);
1130 return (-1);
1131 }
1133 gcry_md_write (hd,
1134 buffer + PART_SIGNATURE_SHA256_SIZE,
1135 buffer_len - PART_SIGNATURE_SHA256_SIZE);
1136 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
1137 if (hash_ptr == NULL)
1138 {
1139 ERROR ("network plugin: gcry_md_read failed.");
1140 gcry_md_close (hd);
1141 sfree (secret);
1142 sfree (pss.username);
1143 return (-1);
1144 }
1145 memcpy (hash, hash_ptr, sizeof (hash));
1147 /* Clean up */
1148 gcry_md_close (hd);
1149 hd = NULL;
1151 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1152 {
1153 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1154 "Hash mismatch.");
1155 }
1156 else
1157 {
1158 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1159 flags | PP_SIGNED, pss.username);
1160 }
1162 sfree (secret);
1163 sfree (pss.username);
1165 *ret_buffer = buffer + buffer_len;
1166 *ret_buffer_len = 0;
1168 return (0);
1169 } /* }}} int parse_part_sign_sha256 */
1170 /* #endif HAVE_LIBGCRYPT */
1172 #else /* if !HAVE_LIBGCRYPT */
1173 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1174 void **ret_buffer, size_t *ret_buffer_size, int flags)
1175 {
1176 static int warning_has_been_printed = 0;
1178 char *buffer;
1179 size_t buffer_size;
1180 size_t buffer_offset;
1181 uint16_t part_len;
1183 part_signature_sha256_t pss;
1185 buffer = *ret_buffer;
1186 buffer_size = *ret_buffer_size;
1187 buffer_offset = 0;
1189 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1190 return (-ENOMEM);
1192 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1193 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1194 part_len = ntohs (pss.head.length);
1196 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1197 || (part_len > buffer_size))
1198 return (-EINVAL);
1200 if (warning_has_been_printed == 0)
1201 {
1202 WARNING ("network plugin: Received signed packet, but the network "
1203 "plugin was not linked with libgcrypt, so I cannot "
1204 "verify the signature. The packet will be accepted.");
1205 warning_has_been_printed = 1;
1206 }
1208 parse_packet (se, buffer + part_len, buffer_size - part_len, flags,
1209 /* username = */ NULL);
1211 *ret_buffer = buffer + buffer_size;
1212 *ret_buffer_size = 0;
1214 return (0);
1215 } /* }}} int parse_part_sign_sha256 */
1216 #endif /* !HAVE_LIBGCRYPT */
1218 #if HAVE_LIBGCRYPT
1219 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1220 void **ret_buffer, size_t *ret_buffer_len,
1221 int flags)
1222 {
1223 char *buffer = *ret_buffer;
1224 size_t buffer_len = *ret_buffer_len;
1225 size_t payload_len;
1226 size_t part_size;
1227 size_t buffer_offset;
1228 uint16_t username_len;
1229 part_encryption_aes256_t pea;
1230 unsigned char hash[sizeof (pea.hash)] = { 0 };
1232 gcry_cipher_hd_t cypher;
1233 gcry_error_t err;
1235 /* Make sure at least the header if available. */
1236 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1237 {
1238 NOTICE ("network plugin: parse_part_encr_aes256: "
1239 "Discarding short packet.");
1240 return (-1);
1241 }
1243 buffer_offset = 0;
1245 /* Copy the unencrypted information into `pea'. */
1246 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1247 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1249 /* Check the `part size'. */
1250 part_size = ntohs (pea.head.length);
1251 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1252 || (part_size > buffer_len))
1253 {
1254 NOTICE ("network plugin: parse_part_encr_aes256: "
1255 "Discarding part with invalid size.");
1256 return (-1);
1257 }
1259 /* Read the username */
1260 BUFFER_READ (&username_len, sizeof (username_len));
1261 username_len = ntohs (username_len);
1263 if ((username_len == 0)
1264 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1265 {
1266 NOTICE ("network plugin: parse_part_encr_aes256: "
1267 "Discarding part with invalid username length.");
1268 return (-1);
1269 }
1271 assert (username_len > 0);
1272 pea.username = malloc (username_len + 1);
1273 if (pea.username == NULL)
1274 return (-ENOMEM);
1275 BUFFER_READ (pea.username, username_len);
1276 pea.username[username_len] = 0;
1278 /* Last but not least, the initialization vector */
1279 BUFFER_READ (pea.iv, sizeof (pea.iv));
1281 /* Make sure we are at the right position */
1282 assert (buffer_offset == (username_len +
1283 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1285 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1286 pea.username);
1287 if (cypher == NULL)
1288 {
1289 sfree (pea.username);
1290 return (-1);
1291 }
1293 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1294 assert (payload_len > 0);
1296 /* Decrypt the packet in-place */
1297 err = gcry_cipher_decrypt (cypher,
1298 buffer + buffer_offset,
1299 part_size - buffer_offset,
1300 /* in = */ NULL, /* in len = */ 0);
1301 if (err != 0)
1302 {
1303 sfree (pea.username);
1304 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1305 gcry_strerror (err));
1306 return (-1);
1307 }
1309 /* Read the hash */
1310 BUFFER_READ (pea.hash, sizeof (pea.hash));
1312 /* Make sure we're at the right position - again */
1313 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1314 assert (buffer_offset == (part_size - payload_len));
1316 /* Check hash sum */
1317 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1318 buffer + buffer_offset, payload_len);
1319 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1320 {
1321 sfree (pea.username);
1322 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1323 return (-1);
1324 }
1326 parse_packet (se, buffer + buffer_offset, payload_len,
1327 flags | PP_ENCRYPTED, pea.username);
1329 /* XXX: Free pea.username?!? */
1331 /* Update return values */
1332 *ret_buffer = buffer + part_size;
1333 *ret_buffer_len = buffer_len - part_size;
1335 sfree (pea.username);
1337 return (0);
1338 } /* }}} int parse_part_encr_aes256 */
1339 /* #endif HAVE_LIBGCRYPT */
1341 #else /* if !HAVE_LIBGCRYPT */
1342 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1343 void **ret_buffer, size_t *ret_buffer_size, int flags)
1344 {
1345 static int warning_has_been_printed = 0;
1347 char *buffer;
1348 size_t buffer_size;
1349 size_t buffer_offset;
1351 part_header_t ph;
1352 size_t ph_length;
1354 buffer = *ret_buffer;
1355 buffer_size = *ret_buffer_size;
1356 buffer_offset = 0;
1358 /* parse_packet assures this minimum size. */
1359 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1361 BUFFER_READ (&ph.type, sizeof (ph.type));
1362 BUFFER_READ (&ph.length, sizeof (ph.length));
1363 ph_length = ntohs (ph.length);
1365 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1366 || (ph_length > buffer_size))
1367 {
1368 ERROR ("network plugin: AES-256 encrypted part "
1369 "with invalid length received.");
1370 return (-1);
1371 }
1373 if (warning_has_been_printed == 0)
1374 {
1375 WARNING ("network plugin: Received encrypted packet, but the network "
1376 "plugin was not linked with libgcrypt, so I cannot "
1377 "decrypt it. The part will be discarded.");
1378 warning_has_been_printed = 1;
1379 }
1381 *ret_buffer = (void *) (((char *) *ret_buffer) + ph_length);
1382 *ret_buffer_size -= ph_length;
1384 return (0);
1385 } /* }}} int parse_part_encr_aes256 */
1386 #endif /* !HAVE_LIBGCRYPT */
1388 #undef BUFFER_READ
1390 static int parse_packet (sockent_t *se, /* {{{ */
1391 void *buffer, size_t buffer_size, int flags,
1392 const char *username)
1393 {
1394 int status;
1396 value_list_t vl = VALUE_LIST_INIT;
1397 notification_t n = { 0 };
1399 #if HAVE_LIBGCRYPT
1400 int packet_was_signed = (flags & PP_SIGNED);
1401 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1402 int printed_ignore_warning = 0;
1403 #endif /* HAVE_LIBGCRYPT */
1406 memset (&vl, '\0', sizeof (vl));
1407 status = 0;
1409 while ((status == 0) && (0 < buffer_size)
1410 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1411 {
1412 uint16_t pkg_length;
1413 uint16_t pkg_type;
1415 memcpy ((void *) &pkg_type,
1416 (void *) buffer,
1417 sizeof (pkg_type));
1418 memcpy ((void *) &pkg_length,
1419 (void *) (((char *) buffer) + sizeof (pkg_type)),
1420 sizeof (pkg_length));
1422 pkg_length = ntohs (pkg_length);
1423 pkg_type = ntohs (pkg_type);
1425 if (pkg_length > buffer_size)
1426 break;
1427 /* Ensure that this loop terminates eventually */
1428 if (pkg_length < (2 * sizeof (uint16_t)))
1429 break;
1431 if (pkg_type == TYPE_ENCR_AES256)
1432 {
1433 status = parse_part_encr_aes256 (se,
1434 &buffer, &buffer_size, flags);
1435 if (status != 0)
1436 {
1437 ERROR ("network plugin: Decrypting AES256 "
1438 "part failed "
1439 "with status %i.", status);
1440 break;
1441 }
1442 }
1443 #if HAVE_LIBGCRYPT
1444 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1445 && (packet_was_encrypted == 0))
1446 {
1447 if (printed_ignore_warning == 0)
1448 {
1449 INFO ("network plugin: Unencrypted packet or "
1450 "part has been ignored.");
1451 printed_ignore_warning = 1;
1452 }
1453 buffer = ((char *) buffer) + pkg_length;
1454 buffer_size -= (size_t) pkg_length;
1455 continue;
1456 }
1457 #endif /* HAVE_LIBGCRYPT */
1458 else if (pkg_type == TYPE_SIGN_SHA256)
1459 {
1460 status = parse_part_sign_sha256 (se,
1461 &buffer, &buffer_size, flags);
1462 if (status != 0)
1463 {
1464 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1465 "signature failed "
1466 "with status %i.", status);
1467 break;
1468 }
1469 }
1470 #if HAVE_LIBGCRYPT
1471 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1472 && (packet_was_encrypted == 0)
1473 && (packet_was_signed == 0))
1474 {
1475 if (printed_ignore_warning == 0)
1476 {
1477 INFO ("network plugin: Unsigned packet or "
1478 "part has been ignored.");
1479 printed_ignore_warning = 1;
1480 }
1481 buffer = ((char *) buffer) + pkg_length;
1482 buffer_size -= (size_t) pkg_length;
1483 continue;
1484 }
1485 #endif /* HAVE_LIBGCRYPT */
1486 else if (pkg_type == TYPE_VALUES)
1487 {
1488 status = parse_part_values (&buffer, &buffer_size,
1489 &vl.values, &vl.values_len);
1490 if (status != 0)
1491 break;
1493 network_dispatch_values (&vl, username);
1495 sfree (vl.values);
1496 }
1497 else if (pkg_type == TYPE_TIME)
1498 {
1499 uint64_t tmp = 0;
1500 status = parse_part_number (&buffer, &buffer_size,
1501 &tmp);
1502 if (status == 0)
1503 {
1504 vl.time = TIME_T_TO_CDTIME_T (tmp);
1505 n.time = TIME_T_TO_CDTIME_T (tmp);
1506 }
1507 }
1508 else if (pkg_type == TYPE_TIME_HR)
1509 {
1510 uint64_t tmp = 0;
1511 status = parse_part_number (&buffer, &buffer_size,
1512 &tmp);
1513 if (status == 0)
1514 {
1515 vl.time = (cdtime_t) tmp;
1516 n.time = (cdtime_t) tmp;
1517 }
1518 }
1519 else if (pkg_type == TYPE_INTERVAL)
1520 {
1521 uint64_t tmp = 0;
1522 status = parse_part_number (&buffer, &buffer_size,
1523 &tmp);
1524 if (status == 0)
1525 vl.interval = TIME_T_TO_CDTIME_T (tmp);
1526 }
1527 else if (pkg_type == TYPE_INTERVAL_HR)
1528 {
1529 uint64_t tmp = 0;
1530 status = parse_part_number (&buffer, &buffer_size,
1531 &tmp);
1532 if (status == 0)
1533 vl.interval = (cdtime_t) tmp;
1534 }
1535 else if (pkg_type == TYPE_HOST)
1536 {
1537 status = parse_part_string (&buffer, &buffer_size,
1538 vl.host, sizeof (vl.host));
1539 if (status == 0)
1540 sstrncpy (n.host, vl.host, sizeof (n.host));
1541 }
1542 else if (pkg_type == TYPE_PLUGIN)
1543 {
1544 status = parse_part_string (&buffer, &buffer_size,
1545 vl.plugin, sizeof (vl.plugin));
1546 if (status == 0)
1547 sstrncpy (n.plugin, vl.plugin,
1548 sizeof (n.plugin));
1549 }
1550 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1551 {
1552 status = parse_part_string (&buffer, &buffer_size,
1553 vl.plugin_instance,
1554 sizeof (vl.plugin_instance));
1555 if (status == 0)
1556 sstrncpy (n.plugin_instance,
1557 vl.plugin_instance,
1558 sizeof (n.plugin_instance));
1559 }
1560 else if (pkg_type == TYPE_TYPE)
1561 {
1562 status = parse_part_string (&buffer, &buffer_size,
1563 vl.type, sizeof (vl.type));
1564 if (status == 0)
1565 sstrncpy (n.type, vl.type, sizeof (n.type));
1566 }
1567 else if (pkg_type == TYPE_TYPE_INSTANCE)
1568 {
1569 status = parse_part_string (&buffer, &buffer_size,
1570 vl.type_instance,
1571 sizeof (vl.type_instance));
1572 if (status == 0)
1573 sstrncpy (n.type_instance, vl.type_instance,
1574 sizeof (n.type_instance));
1575 }
1576 else if (pkg_type == TYPE_MESSAGE)
1577 {
1578 status = parse_part_string (&buffer, &buffer_size,
1579 n.message, sizeof (n.message));
1581 if (status != 0)
1582 {
1583 /* do nothing */
1584 }
1585 else if ((n.severity != NOTIF_FAILURE)
1586 && (n.severity != NOTIF_WARNING)
1587 && (n.severity != NOTIF_OKAY))
1588 {
1589 INFO ("network plugin: "
1590 "Ignoring notification with "
1591 "unknown severity %i.",
1592 n.severity);
1593 }
1594 else if (n.time == 0)
1595 {
1596 INFO ("network plugin: "
1597 "Ignoring notification with "
1598 "time == 0.");
1599 }
1600 else if (strlen (n.message) == 0)
1601 {
1602 INFO ("network plugin: "
1603 "Ignoring notification with "
1604 "an empty message.");
1605 }
1606 else
1607 {
1608 network_dispatch_notification (&n);
1609 }
1610 }
1611 else if (pkg_type == TYPE_SEVERITY)
1612 {
1613 uint64_t tmp = 0;
1614 status = parse_part_number (&buffer, &buffer_size,
1615 &tmp);
1616 if (status == 0)
1617 n.severity = (int) tmp;
1618 }
1619 else
1620 {
1621 DEBUG ("network plugin: parse_packet: Unknown part"
1622 " type: 0x%04hx", pkg_type);
1623 buffer = ((char *) buffer) + pkg_length;
1624 buffer_size -= (size_t) pkg_length;
1625 }
1626 } /* while (buffer_size > sizeof (part_header_t)) */
1628 if (status == 0 && buffer_size > 0)
1629 WARNING ("network plugin: parse_packet: Received truncated "
1630 "packet, try increasing `MaxPacketSize'");
1632 return (status);
1633 } /* }}} int parse_packet */
1635 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1636 {
1637 if (sec->fd >= 0)
1638 {
1639 close (sec->fd);
1640 sec->fd = -1;
1641 }
1642 sfree (sec->addr);
1643 #if HAVE_LIBGCRYPT
1644 sfree (sec->username);
1645 sfree (sec->password);
1646 if (sec->cypher != NULL)
1647 gcry_cipher_close (sec->cypher);
1648 #endif
1649 } /* }}} void free_sockent_client */
1651 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1652 {
1653 size_t i;
1655 for (i = 0; i < ses->fd_num; i++)
1656 {
1657 if (ses->fd[i] >= 0)
1658 {
1659 close (ses->fd[i]);
1660 ses->fd[i] = -1;
1661 }
1662 }
1664 sfree (ses->fd);
1665 #if HAVE_LIBGCRYPT
1666 sfree (ses->auth_file);
1667 fbh_destroy (ses->userdb);
1668 if (ses->cypher != NULL)
1669 gcry_cipher_close (ses->cypher);
1670 #endif
1671 } /* }}} void free_sockent_server */
1673 static void sockent_destroy (sockent_t *se) /* {{{ */
1674 {
1675 sockent_t *next;
1677 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1679 while (se != NULL)
1680 {
1681 next = se->next;
1683 sfree (se->node);
1684 sfree (se->service);
1686 if (se->type == SOCKENT_TYPE_CLIENT)
1687 free_sockent_client (&se->data.client);
1688 else
1689 free_sockent_server (&se->data.server);
1691 sfree (se);
1692 se = next;
1693 }
1694 } /* }}} void sockent_destroy */
1696 /*
1697 * int network_set_ttl
1698 *
1699 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1700 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1701 *
1702 * The `struct addrinfo' is used to destinguish between unicast and multicast
1703 * sockets.
1704 */
1705 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1706 {
1707 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1708 network_config_ttl);
1710 assert (se->type == SOCKENT_TYPE_CLIENT);
1712 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1713 return (-1);
1715 if (ai->ai_family == AF_INET)
1716 {
1717 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1718 int optname;
1720 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1721 optname = IP_MULTICAST_TTL;
1722 else
1723 optname = IP_TTL;
1725 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1726 &network_config_ttl,
1727 sizeof (network_config_ttl)) != 0)
1728 {
1729 char errbuf[1024];
1730 ERROR ("network plugin: setsockopt (ipv4-ttl): %s",
1731 sstrerror (errno, errbuf, sizeof (errbuf)));
1732 return (-1);
1733 }
1734 }
1735 else if (ai->ai_family == AF_INET6)
1736 {
1737 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1738 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1739 int optname;
1741 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1742 optname = IPV6_MULTICAST_HOPS;
1743 else
1744 optname = IPV6_UNICAST_HOPS;
1746 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1747 &network_config_ttl,
1748 sizeof (network_config_ttl)) != 0)
1749 {
1750 char errbuf[1024];
1751 ERROR ("network plugin: setsockopt(ipv6-ttl): %s",
1752 sstrerror (errno, errbuf,
1753 sizeof (errbuf)));
1754 return (-1);
1755 }
1756 }
1758 return (0);
1759 } /* int network_set_ttl */
1761 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1762 {
1763 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1764 se->interface);
1766 assert (se->type == SOCKENT_TYPE_CLIENT);
1768 if (ai->ai_family == AF_INET)
1769 {
1770 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1772 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1773 {
1774 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1775 /* If possible, use the "ip_mreqn" structure which has
1776 * an "interface index" member. Using the interface
1777 * index is preferred here, because of its similarity
1778 * to the way IPv6 handles this. Unfortunately, it
1779 * appears not to be portable. */
1780 struct ip_mreqn mreq = {
1781 .imr_multiaddr.s_addr = addr->sin_addr.s_addr,
1782 .imr_address.s_addr = ntohl (INADDR_ANY),
1783 .imr_ifindex = se->interface
1784 };
1785 #else
1786 struct ip_mreq mreq = {
1787 .imr_multiaddr.s_addr = addr->sin_addr.s_addr,
1788 .imr_interface.s_addr = ntohl (INADDR_ANY)
1789 };
1790 #endif
1792 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1793 &mreq, sizeof (mreq)) != 0)
1794 {
1795 char errbuf[1024];
1796 ERROR ("network plugin: setsockopt (ipv4-multicast-if): %s",
1797 sstrerror (errno, errbuf, sizeof (errbuf)));
1798 return (-1);
1799 }
1801 return (0);
1802 }
1803 }
1804 else if (ai->ai_family == AF_INET6)
1805 {
1806 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1808 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1809 {
1810 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1811 &se->interface,
1812 sizeof (se->interface)) != 0)
1813 {
1814 char errbuf[1024];
1815 ERROR ("network plugin: setsockopt (ipv6-multicast-if): %s",
1816 sstrerror (errno, errbuf,
1817 sizeof (errbuf)));
1818 return (-1);
1819 }
1821 return (0);
1822 }
1823 }
1825 /* else: Not a multicast interface. */
1826 if (se->interface != 0)
1827 {
1828 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1829 char interface_name[IFNAMSIZ];
1831 if (if_indextoname (se->interface, interface_name) == NULL)
1832 return (-1);
1834 DEBUG ("network plugin: Binding socket to interface %s", interface_name);
1836 if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
1837 interface_name,
1838 sizeof(interface_name)) == -1 )
1839 {
1840 char errbuf[1024];
1841 ERROR ("network plugin: setsockopt (bind-if): %s",
1842 sstrerror (errno, errbuf, sizeof (errbuf)));
1843 return (-1);
1844 }
1845 /* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1847 #else
1848 WARNING ("network plugin: Cannot set the interface on a unicast "
1849 "socket because "
1850 # if !defined(SO_BINDTODEVICE)
1851 "the \"SO_BINDTODEVICE\" socket option "
1852 # else
1853 "the \"if_indextoname\" function "
1854 # endif
1855 "is not available on your system.");
1856 #endif
1858 }
1860 return (0);
1861 } /* }}} network_set_interface */
1863 static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
1864 {
1865 #if KERNEL_SOLARIS
1866 char loop = 0;
1867 #else
1868 int loop = 0;
1869 #endif
1870 int yes = 1;
1872 /* allow multiple sockets to use the same PORT number */
1873 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1874 &yes, sizeof(yes)) == -1) {
1875 char errbuf[1024];
1876 ERROR ("network plugin: setsockopt (reuseaddr): %s",
1877 sstrerror (errno, errbuf, sizeof (errbuf)));
1878 return (-1);
1879 }
1881 DEBUG ("fd = %i; calling `bind'", fd);
1883 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1884 {
1885 char errbuf[1024];
1886 ERROR ("bind: %s",
1887 sstrerror (errno, errbuf, sizeof (errbuf)));
1888 return (-1);
1889 }
1891 if (ai->ai_family == AF_INET)
1892 {
1893 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1894 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1895 {
1896 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1897 struct ip_mreqn mreq;
1898 #else
1899 struct ip_mreq mreq;
1900 #endif
1902 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1904 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1905 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1906 /* Set the interface using the interface index if
1907 * possible (available). Unfortunately, the struct
1908 * ip_mreqn is not portable. */
1909 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1910 mreq.imr_ifindex = interface_idx;
1911 #else
1912 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1913 #endif
1915 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1916 &loop, sizeof (loop)) == -1)
1917 {
1918 char errbuf[1024];
1919 ERROR ("network plugin: setsockopt (multicast-loop): %s",
1920 sstrerror (errno, errbuf,
1921 sizeof (errbuf)));
1922 return (-1);
1923 }
1925 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1926 &mreq, sizeof (mreq)) == -1)
1927 {
1928 char errbuf[1024];
1929 ERROR ("network plugin: setsockopt (add-membership): %s",
1930 sstrerror (errno, errbuf,
1931 sizeof (errbuf)));
1932 return (-1);
1933 }
1935 return (0);
1936 }
1937 }
1938 else if (ai->ai_family == AF_INET6)
1939 {
1940 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1941 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1942 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1943 {
1944 struct ipv6_mreq mreq;
1946 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1948 memcpy (&mreq.ipv6mr_multiaddr,
1949 &addr->sin6_addr,
1950 sizeof (addr->sin6_addr));
1952 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1953 * ipv6mr_interface may be set to zeroes to
1954 * choose the default multicast interface or to
1955 * the index of a particular multicast-capable
1956 * interface if the host is multihomed.
1957 * Membership is associ-associated with a
1958 * single interface; programs running on
1959 * multihomed hosts may need to join the same
1960 * group on more than one interface.*/
1961 mreq.ipv6mr_interface = interface_idx;
1963 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1964 &loop, sizeof (loop)) == -1)
1965 {
1966 char errbuf[1024];
1967 ERROR ("network plugin: setsockopt (ipv6-multicast-loop): %s",
1968 sstrerror (errno, errbuf,
1969 sizeof (errbuf)));
1970 return (-1);
1971 }
1973 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1974 &mreq, sizeof (mreq)) == -1)
1975 {
1976 char errbuf[1024];
1977 ERROR ("network plugin: setsockopt (ipv6-add-membership): %s",
1978 sstrerror (errno, errbuf,
1979 sizeof (errbuf)));
1980 return (-1);
1981 }
1983 return (0);
1984 }
1985 }
1987 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1988 /* if a specific interface was set, bind the socket to it. But to avoid
1989 * possible problems with multicast routing, only do that for non-multicast
1990 * addresses */
1991 if (interface_idx != 0)
1992 {
1993 char interface_name[IFNAMSIZ];
1995 if (if_indextoname (interface_idx, interface_name) == NULL)
1996 return (-1);
1998 DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
2000 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
2001 interface_name,
2002 sizeof(interface_name)) == -1 )
2003 {
2004 char errbuf[1024];
2005 ERROR ("network plugin: setsockopt (bind-if): %s",
2006 sstrerror (errno, errbuf, sizeof (errbuf)));
2007 return (-1);
2008 }
2009 }
2010 #endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
2012 return (0);
2013 } /* int network_bind_socket */
2015 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
2016 * or `SOCKENT_TYPE_SERVER' */
2017 static sockent_t *sockent_create (int type) /* {{{ */
2018 {
2019 sockent_t *se;
2021 if ((type != SOCKENT_TYPE_CLIENT) && (type != SOCKENT_TYPE_SERVER))
2022 return (NULL);
2024 se = calloc (1, sizeof (*se));
2025 if (se == NULL)
2026 return (NULL);
2028 se->type = type;
2029 se->node = NULL;
2030 se->service = NULL;
2031 se->interface = 0;
2032 se->next = NULL;
2034 if (type == SOCKENT_TYPE_SERVER)
2035 {
2036 se->data.server.fd = NULL;
2037 se->data.server.fd_num = 0;
2038 #if HAVE_LIBGCRYPT
2039 se->data.server.security_level = SECURITY_LEVEL_NONE;
2040 se->data.server.auth_file = NULL;
2041 se->data.server.userdb = NULL;
2042 se->data.server.cypher = NULL;
2043 #endif
2044 }
2045 else
2046 {
2047 se->data.client.fd = -1;
2048 se->data.client.addr = NULL;
2049 se->data.client.resolve_interval = 0;
2050 se->data.client.next_resolve_reconnect = 0;
2051 #if HAVE_LIBGCRYPT
2052 se->data.client.security_level = SECURITY_LEVEL_NONE;
2053 se->data.client.username = NULL;
2054 se->data.client.password = NULL;
2055 se->data.client.cypher = NULL;
2056 #endif
2057 }
2059 return (se);
2060 } /* }}} sockent_t *sockent_create */
2062 static int sockent_init_crypto (sockent_t *se) /* {{{ */
2063 {
2064 #if HAVE_LIBGCRYPT /* {{{ */
2065 if (se->type == SOCKENT_TYPE_CLIENT)
2066 {
2067 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
2068 {
2069 network_init_gcrypt ();
2071 if ((se->data.client.username == NULL)
2072 || (se->data.client.password == NULL))
2073 {
2074 ERROR ("network plugin: Client socket with "
2075 "security requested, but no "
2076 "credentials are configured.");
2077 return (-1);
2078 }
2079 gcry_md_hash_buffer (GCRY_MD_SHA256,
2080 se->data.client.password_hash,
2081 se->data.client.password,
2082 strlen (se->data.client.password));
2083 }
2084 }
2085 else /* (se->type == SOCKENT_TYPE_SERVER) */
2086 {
2087 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2088 {
2089 network_init_gcrypt ();
2091 if (se->data.server.auth_file == NULL)
2092 {
2093 ERROR ("network plugin: Server socket with "
2094 "security requested, but no "
2095 "password file is configured.");
2096 return (-1);
2097 }
2098 }
2099 if (se->data.server.auth_file != NULL)
2100 {
2101 se->data.server.userdb = fbh_create (se->data.server.auth_file);
2102 if (se->data.server.userdb == NULL)
2103 {
2104 ERROR ("network plugin: Reading password file "
2105 "`%s' failed.",
2106 se->data.server.auth_file);
2107 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2108 return (-1);
2109 }
2110 }
2111 }
2112 #endif /* }}} HAVE_LIBGCRYPT */
2114 return (0);
2115 } /* }}} int sockent_init_crypto */
2117 static int sockent_client_disconnect (sockent_t *se) /* {{{ */
2118 {
2119 struct sockent_client *client;
2121 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2122 return (EINVAL);
2124 client = &se->data.client;
2125 if (client->fd >= 0) /* connected */
2126 {
2127 close (client->fd);
2128 client->fd = -1;
2129 }
2131 sfree (client->addr);
2132 client->addrlen = 0;
2134 return (0);
2135 } /* }}} int sockent_client_disconnect */
2137 static int sockent_client_connect (sockent_t *se) /* {{{ */
2138 {
2139 static c_complain_t complaint = C_COMPLAIN_INIT_STATIC;
2141 struct sockent_client *client;
2142 struct addrinfo ai_hints = { 0 };
2143 struct addrinfo *ai_list = NULL, *ai_ptr;
2144 int status;
2145 _Bool reconnect = 0;
2146 cdtime_t now;
2148 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2149 return (EINVAL);
2151 client = &se->data.client;
2153 now = cdtime ();
2154 if (client->resolve_interval != 0 && client->next_resolve_reconnect < now) {
2155 DEBUG("network plugin: Reconnecting socket, resolve_interval = %lf, next_resolve_reconnect = %lf",
2156 CDTIME_T_TO_DOUBLE(client->resolve_interval), CDTIME_T_TO_DOUBLE(client->next_resolve_reconnect));
2157 reconnect = 1;
2158 }
2160 if (client->fd >= 0 && !reconnect) /* already connected and not stale*/
2161 return (0);
2163 #ifdef AI_ADDRCONFIG
2164 ai_hints.ai_flags |= AI_ADDRCONFIG;
2165 #endif
2166 ai_hints.ai_family = AF_UNSPEC;
2167 ai_hints.ai_socktype = SOCK_DGRAM;
2168 ai_hints.ai_protocol = IPPROTO_UDP;
2170 status = getaddrinfo (se->node,
2171 (se->service != NULL) ? se->service : NET_DEFAULT_PORT,
2172 &ai_hints, &ai_list);
2173 if (status != 0)
2174 {
2175 c_complain (LOG_ERR, &complaint,
2176 "network plugin: getaddrinfo (%s, %s) failed: %s",
2177 (se->node == NULL) ? "(null)" : se->node,
2178 (se->service == NULL) ? "(null)" : se->service,
2179 gai_strerror (status));
2180 return (-1);
2181 }
2182 else
2183 {
2184 c_release (LOG_NOTICE, &complaint,
2185 "network plugin: Successfully resolved \"%s\".",
2186 se->node);
2187 }
2189 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2190 {
2191 if (client->fd >= 0) /* when we reconnect */
2192 sockent_client_disconnect(se);
2194 client->fd = socket (ai_ptr->ai_family,
2195 ai_ptr->ai_socktype,
2196 ai_ptr->ai_protocol);
2197 if (client->fd < 0)
2198 {
2199 char errbuf[1024];
2200 ERROR ("network plugin: socket(2) failed: %s",
2201 sstrerror (errno, errbuf,
2202 sizeof (errbuf)));
2203 continue;
2204 }
2206 client->addr = calloc (1, sizeof (*client->addr));
2207 if (client->addr == NULL)
2208 {
2209 ERROR ("network plugin: calloc failed.");
2210 close (client->fd);
2211 client->fd = -1;
2212 continue;
2213 }
2215 assert (sizeof (*client->addr) >= ai_ptr->ai_addrlen);
2216 memcpy (client->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2217 client->addrlen = ai_ptr->ai_addrlen;
2219 network_set_ttl (se, ai_ptr);
2220 network_set_interface (se, ai_ptr);
2222 /* We don't open more than one write-socket per
2223 * node/service pair.. */
2224 break;
2225 }
2227 freeaddrinfo (ai_list);
2228 if (client->fd < 0)
2229 return (-1);
2231 if (client->resolve_interval > 0)
2232 client->next_resolve_reconnect = now + client->resolve_interval;
2233 return (0);
2234 } /* }}} int sockent_client_connect */
2236 /* Open the file descriptors for a initialized sockent structure. */
2237 static int sockent_server_listen (sockent_t *se) /* {{{ */
2238 {
2239 struct addrinfo ai_hints = { 0 };
2240 struct addrinfo *ai_list, *ai_ptr;
2241 int status;
2243 const char *node;
2244 const char *service;
2246 if (se == NULL)
2247 return (-1);
2249 assert (se->data.server.fd == NULL);
2250 assert (se->data.server.fd_num == 0);
2252 node = se->node;
2253 service = se->service;
2255 if (service == NULL)
2256 service = NET_DEFAULT_PORT;
2258 DEBUG ("network plugin: sockent_server_listen: node = %s; service = %s;",
2259 node, service);
2261 #ifdef AI_PASSIVE
2262 ai_hints.ai_flags |= AI_PASSIVE;
2263 #endif
2264 #ifdef AI_ADDRCONFIG
2265 ai_hints.ai_flags |= AI_ADDRCONFIG;
2266 #endif
2267 ai_hints.ai_family = AF_UNSPEC;
2268 ai_hints.ai_socktype = SOCK_DGRAM;
2269 ai_hints.ai_protocol = IPPROTO_UDP;
2271 status = getaddrinfo (node, service, &ai_hints, &ai_list);
2272 if (status != 0)
2273 {
2274 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
2275 (se->node == NULL) ? "(null)" : se->node,
2276 (se->service == NULL) ? "(null)" : se->service,
2277 gai_strerror (status));
2278 return (-1);
2279 }
2281 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2282 {
2283 int *tmp;
2285 tmp = realloc (se->data.server.fd,
2286 sizeof (*tmp) * (se->data.server.fd_num + 1));
2287 if (tmp == NULL)
2288 {
2289 ERROR ("network plugin: realloc failed.");
2290 continue;
2291 }
2292 se->data.server.fd = tmp;
2293 tmp = se->data.server.fd + se->data.server.fd_num;
2295 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
2296 ai_ptr->ai_protocol);
2297 if (*tmp < 0)
2298 {
2299 char errbuf[1024];
2300 ERROR ("network plugin: socket(2) failed: %s",
2301 sstrerror (errno, errbuf,
2302 sizeof (errbuf)));
2303 continue;
2304 }
2306 status = network_bind_socket (*tmp, ai_ptr, se->interface);
2307 if (status != 0)
2308 {
2309 close (*tmp);
2310 *tmp = -1;
2311 continue;
2312 }
2314 se->data.server.fd_num++;
2315 continue;
2316 } /* for (ai_list) */
2318 freeaddrinfo (ai_list);
2320 if (se->data.server.fd_num == 0)
2321 return (-1);
2322 return (0);
2323 } /* }}} int sockent_server_listen */
2325 /* Add a sockent to the global list of sockets */
2326 static int sockent_add (sockent_t *se) /* {{{ */
2327 {
2328 sockent_t *last_ptr;
2330 if (se == NULL)
2331 return (-1);
2333 if (se->type == SOCKENT_TYPE_SERVER)
2334 {
2335 struct pollfd *tmp;
2336 size_t i;
2338 tmp = realloc (listen_sockets_pollfd,
2339 sizeof (*tmp) * (listen_sockets_num
2340 + se->data.server.fd_num));
2341 if (tmp == NULL)
2342 {
2343 ERROR ("network plugin: realloc failed.");
2344 return (-1);
2345 }
2346 listen_sockets_pollfd = tmp;
2347 tmp = listen_sockets_pollfd + listen_sockets_num;
2349 for (i = 0; i < se->data.server.fd_num; i++)
2350 {
2351 memset (tmp + i, 0, sizeof (*tmp));
2352 tmp[i].fd = se->data.server.fd[i];
2353 tmp[i].events = POLLIN | POLLPRI;
2354 tmp[i].revents = 0;
2355 }
2357 listen_sockets_num += se->data.server.fd_num;
2359 if (listen_sockets == NULL)
2360 {
2361 listen_sockets = se;
2362 return (0);
2363 }
2364 last_ptr = listen_sockets;
2365 }
2366 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2367 {
2368 if (sending_sockets == NULL)
2369 {
2370 sending_sockets = se;
2371 return (0);
2372 }
2373 last_ptr = sending_sockets;
2374 }
2376 while (last_ptr->next != NULL)
2377 last_ptr = last_ptr->next;
2378 last_ptr->next = se;
2380 return (0);
2381 } /* }}} int sockent_add */
2383 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
2384 {
2385 while (42)
2386 {
2387 receive_list_entry_t *ent;
2388 sockent_t *se;
2390 /* Lock and wait for more data to come in */
2391 pthread_mutex_lock (&receive_list_lock);
2392 while ((listen_loop == 0)
2393 && (receive_list_head == NULL))
2394 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
2396 /* Remove the head entry and unlock */
2397 ent = receive_list_head;
2398 if (ent != NULL)
2399 receive_list_head = ent->next;
2400 receive_list_length--;
2401 pthread_mutex_unlock (&receive_list_lock);
2403 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2404 * because we dispatch all missing packets before shutting down. */
2405 if (ent == NULL)
2406 break;
2408 /* Look for the correct `sockent_t' */
2409 se = listen_sockets;
2410 while (se != NULL)
2411 {
2412 size_t i;
2414 for (i = 0; i < se->data.server.fd_num; i++)
2415 if (se->data.server.fd[i] == ent->fd)
2416 break;
2418 if (i < se->data.server.fd_num)
2419 break;
2421 se = se->next;
2422 }
2424 if (se == NULL)
2425 {
2426 ERROR ("network plugin: Got packet from FD %i, but can't "
2427 "find an appropriate socket entry.",
2428 ent->fd);
2429 sfree (ent->data);
2430 sfree (ent);
2431 continue;
2432 }
2434 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0,
2435 /* username = */ NULL);
2436 sfree (ent->data);
2437 sfree (ent);
2438 } /* while (42) */
2440 return (NULL);
2441 } /* }}} void *dispatch_thread */
2443 static int network_receive (void) /* {{{ */
2444 {
2445 char buffer[network_config_packet_size];
2446 int buffer_len;
2448 size_t i;
2449 int status = 0;
2451 receive_list_entry_t *private_list_head;
2452 receive_list_entry_t *private_list_tail;
2453 uint64_t private_list_length;
2455 assert (listen_sockets_num > 0);
2457 private_list_head = NULL;
2458 private_list_tail = NULL;
2459 private_list_length = 0;
2461 while (listen_loop == 0)
2462 {
2463 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2464 if (status <= 0)
2465 {
2466 char errbuf[1024];
2467 if (errno == EINTR)
2468 continue;
2469 ERROR ("network plugin: poll(2) failed: %s",
2470 sstrerror (errno, errbuf, sizeof (errbuf)));
2471 break;
2472 }
2474 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2475 {
2476 receive_list_entry_t *ent;
2478 if ((listen_sockets_pollfd[i].revents
2479 & (POLLIN | POLLPRI)) == 0)
2480 continue;
2481 status--;
2483 buffer_len = recv (listen_sockets_pollfd[i].fd,
2484 buffer, sizeof (buffer),
2485 0 /* no flags */);
2486 if (buffer_len < 0)
2487 {
2488 char errbuf[1024];
2489 status = (errno != 0) ? errno : -1;
2490 ERROR ("network plugin: recv(2) failed: %s",
2491 sstrerror (errno, errbuf, sizeof (errbuf)));
2492 break;
2493 }
2495 stats_octets_rx += ((uint64_t) buffer_len);
2496 stats_packets_rx++;
2498 /* TODO: Possible performance enhancement: Do not free
2499 * these entries in the dispatch thread but put them in
2500 * another list, so we don't have to allocate more and
2501 * more of these structures. */
2502 ent = calloc (1, sizeof (*ent));
2503 if (ent == NULL)
2504 {
2505 ERROR ("network plugin: calloc failed.");
2506 status = ENOMEM;
2507 break;
2508 }
2510 ent->data = malloc (network_config_packet_size);
2511 if (ent->data == NULL)
2512 {
2513 sfree (ent);
2514 ERROR ("network plugin: malloc failed.");
2515 status = ENOMEM;
2516 break;
2517 }
2518 ent->fd = listen_sockets_pollfd[i].fd;
2519 ent->next = NULL;
2521 memcpy (ent->data, buffer, buffer_len);
2522 ent->data_len = buffer_len;
2524 if (private_list_head == NULL)
2525 private_list_head = ent;
2526 else
2527 private_list_tail->next = ent;
2528 private_list_tail = ent;
2529 private_list_length++;
2531 /* Do not block here. Blocking here has led to
2532 * insufficient performance in the past. */
2533 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2534 {
2535 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2536 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2538 if (receive_list_head == NULL)
2539 receive_list_head = private_list_head;
2540 else
2541 receive_list_tail->next = private_list_head;
2542 receive_list_tail = private_list_tail;
2543 receive_list_length += private_list_length;
2545 pthread_cond_signal (&receive_list_cond);
2546 pthread_mutex_unlock (&receive_list_lock);
2548 private_list_head = NULL;
2549 private_list_tail = NULL;
2550 private_list_length = 0;
2551 }
2553 status = 0;
2554 } /* for (listen_sockets_pollfd) */
2556 if (status != 0)
2557 break;
2558 } /* while (listen_loop == 0) */
2560 /* Make sure everything is dispatched before exiting. */
2561 if (private_list_head != NULL)
2562 {
2563 pthread_mutex_lock (&receive_list_lock);
2565 if (receive_list_head == NULL)
2566 receive_list_head = private_list_head;
2567 else
2568 receive_list_tail->next = private_list_head;
2569 receive_list_tail = private_list_tail;
2570 receive_list_length += private_list_length;
2572 pthread_cond_signal (&receive_list_cond);
2573 pthread_mutex_unlock (&receive_list_lock);
2574 }
2576 return (status);
2577 } /* }}} int network_receive */
2579 static void *receive_thread (void __attribute__((unused)) *arg)
2580 {
2581 return (network_receive () ? (void *) 1 : (void *) 0);
2582 } /* void *receive_thread */
2584 static void network_init_buffer (void)
2585 {
2586 memset (send_buffer, 0, network_config_packet_size);
2587 send_buffer_ptr = send_buffer;
2588 send_buffer_fill = 0;
2589 send_buffer_last_update = 0;
2591 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2592 } /* int network_init_buffer */
2594 static void network_send_buffer_plain (sockent_t *se, /* {{{ */
2595 const char *buffer, size_t buffer_size)
2596 {
2597 int status;
2599 while (42)
2600 {
2601 status = sockent_client_connect (se);
2602 if (status != 0)
2603 return;
2605 status = sendto (se->data.client.fd, buffer, buffer_size,
2606 /* flags = */ 0,
2607 (struct sockaddr *) se->data.client.addr,
2608 se->data.client.addrlen);
2609 if (status < 0)
2610 {
2611 char errbuf[1024];
2613 if ((errno == EINTR) || (errno == EAGAIN))
2614 continue;
2616 ERROR ("network plugin: sendto failed: %s. Closing sending socket.",
2617 sstrerror (errno, errbuf, sizeof (errbuf)));
2618 sockent_client_disconnect (se);
2619 return;
2620 }
2622 break;
2623 } /* while (42) */
2624 } /* }}} void network_send_buffer_plain */
2626 #if HAVE_LIBGCRYPT
2627 #define BUFFER_ADD(p,s) do { \
2628 memcpy (buffer + buffer_offset, (p), (s)); \
2629 buffer_offset += (s); \
2630 } while (0)
2632 static void network_send_buffer_signed (sockent_t *se, /* {{{ */
2633 const char *in_buffer, size_t in_buffer_size)
2634 {
2635 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2636 size_t buffer_offset;
2637 size_t username_len;
2639 gcry_md_hd_t hd;
2640 gcry_error_t err;
2641 unsigned char *hash;
2643 hd = NULL;
2644 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2645 if (err != 0)
2646 {
2647 ERROR ("network plugin: Creating HMAC object failed: %s",
2648 gcry_strerror (err));
2649 return;
2650 }
2652 err = gcry_md_setkey (hd, se->data.client.password,
2653 strlen (se->data.client.password));
2654 if (err != 0)
2655 {
2656 ERROR ("network plugin: gcry_md_setkey failed: %s",
2657 gcry_strerror (err));
2658 gcry_md_close (hd);
2659 return;
2660 }
2662 username_len = strlen (se->data.client.username);
2663 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2664 {
2665 ERROR ("network plugin: Username too long: %s",
2666 se->data.client.username);
2667 return;
2668 }
2670 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2671 se->data.client.username, username_len);
2672 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2673 in_buffer, in_buffer_size);
2675 /* Initialize the `ps' structure. */
2676 part_signature_sha256_t ps = {
2677 .head.type = htons (TYPE_SIGN_SHA256),
2678 .head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len)
2679 };
2681 /* Calculate the hash value. */
2682 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2683 username_len + in_buffer_size);
2684 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2685 if (hash == NULL)
2686 {
2687 ERROR ("network plugin: gcry_md_read failed.");
2688 gcry_md_close (hd);
2689 return;
2690 }
2691 memcpy (ps.hash, hash, sizeof (ps.hash));
2693 /* Add the header */
2694 buffer_offset = 0;
2696 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2697 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2698 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2700 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2702 gcry_md_close (hd);
2703 hd = NULL;
2705 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2706 network_send_buffer_plain (se, buffer, buffer_offset);
2707 } /* }}} void network_send_buffer_signed */
2709 static void network_send_buffer_encrypted (sockent_t *se, /* {{{ */
2710 const char *in_buffer, size_t in_buffer_size)
2711 {
2712 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2713 size_t buffer_size;
2714 size_t buffer_offset;
2715 size_t header_size;
2716 size_t username_len;
2717 gcry_error_t err;
2718 gcry_cipher_hd_t cypher;
2720 /* Initialize the header fields */
2721 part_encryption_aes256_t pea = {
2722 .head.type = htons (TYPE_ENCR_AES256),
2723 .username = se->data.client.username
2724 };
2726 username_len = strlen (pea.username);
2727 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2728 {
2729 ERROR ("network plugin: Username too long: %s", pea.username);
2730 return;
2731 }
2733 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2734 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2735 - sizeof (pea.hash);
2737 assert (buffer_size <= sizeof (buffer));
2738 DEBUG ("network plugin: network_send_buffer_encrypted: "
2739 "buffer_size = %zu;", buffer_size);
2741 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2742 + username_len + in_buffer_size));
2743 pea.username_length = htons ((uint16_t) username_len);
2745 /* Chose a random initialization vector. */
2746 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2748 /* Create hash of the payload */
2749 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2751 /* Initialize the buffer */
2752 buffer_offset = 0;
2753 memset (buffer, 0, sizeof (buffer));
2756 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2757 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2758 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2759 BUFFER_ADD (pea.username, username_len);
2760 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2761 assert (buffer_offset == header_size);
2762 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2763 BUFFER_ADD (in_buffer, in_buffer_size);
2765 assert (buffer_offset == buffer_size);
2767 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2768 se->data.client.password);
2769 if (cypher == NULL)
2770 return;
2772 /* Encrypt the buffer in-place */
2773 err = gcry_cipher_encrypt (cypher,
2774 buffer + header_size,
2775 buffer_size - header_size,
2776 /* in = */ NULL, /* in len = */ 0);
2777 if (err != 0)
2778 {
2779 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2780 gcry_strerror (err));
2781 return;
2782 }
2784 /* Send it out without further modifications */
2785 network_send_buffer_plain (se, buffer, buffer_size);
2786 } /* }}} void network_send_buffer_encrypted */
2787 #undef BUFFER_ADD
2788 #endif /* HAVE_LIBGCRYPT */
2790 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2791 {
2792 sockent_t *se;
2794 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2796 for (se = sending_sockets; se != NULL; se = se->next)
2797 {
2798 #if HAVE_LIBGCRYPT
2799 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2800 network_send_buffer_encrypted (se, buffer, buffer_len);
2801 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2802 network_send_buffer_signed (se, buffer, buffer_len);
2803 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2804 #endif /* HAVE_LIBGCRYPT */
2805 network_send_buffer_plain (se, buffer, buffer_len);
2806 } /* for (sending_sockets) */
2807 } /* }}} void network_send_buffer */
2809 static int add_to_buffer (char *buffer, size_t buffer_size, /* {{{ */
2810 value_list_t *vl_def,
2811 const data_set_t *ds, const value_list_t *vl)
2812 {
2813 char *buffer_orig = buffer;
2815 if (strcmp (vl_def->host, vl->host) != 0)
2816 {
2817 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2818 vl->host, strlen (vl->host)) != 0)
2819 return (-1);
2820 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2821 }
2823 if (vl_def->time != vl->time)
2824 {
2825 if (write_part_number (&buffer, &buffer_size, TYPE_TIME_HR,
2826 (uint64_t) vl->time))
2827 return (-1);
2828 vl_def->time = vl->time;
2829 }
2831 if (vl_def->interval != vl->interval)
2832 {
2833 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL_HR,
2834 (uint64_t) vl->interval))
2835 return (-1);
2836 vl_def->interval = vl->interval;
2837 }
2839 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2840 {
2841 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2842 vl->plugin, strlen (vl->plugin)) != 0)
2843 return (-1);
2844 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2845 }
2847 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2848 {
2849 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2850 vl->plugin_instance,
2851 strlen (vl->plugin_instance)) != 0)
2852 return (-1);
2853 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2854 }
2856 if (strcmp (vl_def->type, vl->type) != 0)
2857 {
2858 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2859 vl->type, strlen (vl->type)) != 0)
2860 return (-1);
2861 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2862 }
2864 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2865 {
2866 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2867 vl->type_instance,
2868 strlen (vl->type_instance)) != 0)
2869 return (-1);
2870 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2871 }
2873 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2874 return (-1);
2876 return (buffer - buffer_orig);
2877 } /* }}} int add_to_buffer */
2879 static void flush_buffer (void)
2880 {
2881 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2882 send_buffer_fill);
2884 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2886 stats_octets_tx += ((uint64_t) send_buffer_fill);
2887 stats_packets_tx++;
2889 network_init_buffer ();
2890 }
2892 static int network_write (const data_set_t *ds, const value_list_t *vl,
2893 user_data_t __attribute__((unused)) *user_data)
2894 {
2895 int status;
2897 if (!check_send_okay (vl))
2898 {
2899 #if COLLECT_DEBUG
2900 char name[6*DATA_MAX_NAME_LEN];
2901 FORMAT_VL (name, sizeof (name), vl);
2902 name[sizeof (name) - 1] = 0;
2903 DEBUG ("network plugin: network_write: "
2904 "NOT sending %s.", name);
2905 #endif
2906 /* Counter is not protected by another lock and may be reached by
2907 * multiple threads */
2908 pthread_mutex_lock (&stats_lock);
2909 stats_values_not_sent++;
2910 pthread_mutex_unlock (&stats_lock);
2911 return (0);
2912 }
2914 uc_meta_data_add_unsigned_int (vl,
2915 "network:time_sent", (uint64_t) vl->time);
2917 pthread_mutex_lock (&send_buffer_lock);
2919 status = add_to_buffer (send_buffer_ptr,
2920 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2921 &send_buffer_vl,
2922 ds, vl);
2923 if (status >= 0)
2924 {
2925 /* status == bytes added to the buffer */
2926 send_buffer_fill += status;
2927 send_buffer_ptr += status;
2928 send_buffer_last_update = cdtime();
2930 stats_values_sent++;
2931 }
2932 else
2933 {
2934 flush_buffer ();
2936 status = add_to_buffer (send_buffer_ptr,
2937 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2938 &send_buffer_vl,
2939 ds, vl);
2941 if (status >= 0)
2942 {
2943 send_buffer_fill += status;
2944 send_buffer_ptr += status;
2946 stats_values_sent++;
2947 }
2948 }
2950 if (status < 0)
2951 {
2952 ERROR ("network plugin: Unable to append to the "
2953 "buffer for some weird reason");
2954 }
2955 else if ((network_config_packet_size - send_buffer_fill) < 15)
2956 {
2957 flush_buffer ();
2958 }
2960 pthread_mutex_unlock (&send_buffer_lock);
2962 return ((status < 0) ? -1 : 0);
2963 } /* int network_write */
2965 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2966 {
2967 int tmp = 0;
2969 if (cf_util_get_int (ci, &tmp) != 0)
2970 return (-1);
2971 else if ((tmp > 0) && (tmp <= 255))
2972 network_config_ttl = tmp;
2973 else {
2974 WARNING ("network plugin: The `TimeToLive' must be between 1 and 255.");
2975 return (-1);
2976 }
2978 return (0);
2979 } /* }}} int network_config_set_ttl */
2981 static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
2982 int *interface)
2983 {
2984 char if_name[256];
2986 if (cf_util_get_string_buffer (ci, if_name, sizeof (if_name)) != 0)
2987 return (-1);
2989 *interface = if_nametoindex (if_name);
2990 return (0);
2991 } /* }}} int network_config_set_interface */
2993 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
2994 {
2995 int tmp = 0;
2997 if (cf_util_get_int (ci, &tmp) != 0)
2998 return (-1);
2999 else if ((tmp >= 1024) && (tmp <= 65535))
3000 network_config_packet_size = tmp;
3001 else {
3002 WARNING ("network plugin: The `MaxPacketSize' must be between 1024 and 65535.");
3003 return (-1);
3004 }
3006 return (0);
3007 } /* }}} int network_config_set_buffer_size */
3009 #if HAVE_LIBGCRYPT
3010 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
3011 int *retval)
3012 {
3013 char *str;
3014 if ((ci->values_num != 1)
3015 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3016 {
3017 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
3018 "one string argument.");
3019 return (-1);
3020 }
3022 str = ci->values[0].value.string;
3023 if (strcasecmp ("Encrypt", str) == 0)
3024 *retval = SECURITY_LEVEL_ENCRYPT;
3025 else if (strcasecmp ("Sign", str) == 0)
3026 *retval = SECURITY_LEVEL_SIGN;
3027 else if (strcasecmp ("None", str) == 0)
3028 *retval = SECURITY_LEVEL_NONE;
3029 else
3030 {
3031 WARNING ("network plugin: Unknown security level: %s.", str);
3032 return (-1);
3033 }
3035 return (0);
3036 } /* }}} int network_config_set_security_level */
3037 #endif /* HAVE_LIBGCRYPT */
3039 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
3040 {
3041 sockent_t *se;
3042 int status;
3043 int i;
3045 if ((ci->values_num < 1) || (ci->values_num > 2)
3046 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3047 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3048 {
3049 ERROR ("network plugin: The `%s' config option needs "
3050 "one or two string arguments.", ci->key);
3051 return (-1);
3052 }
3054 se = sockent_create (SOCKENT_TYPE_SERVER);
3055 if (se == NULL)
3056 {
3057 ERROR ("network plugin: sockent_create failed.");
3058 return (-1);
3059 }
3061 se->node = strdup (ci->values[0].value.string);
3062 if (ci->values_num >= 2)
3063 se->service = strdup (ci->values[1].value.string);
3065 for (i = 0; i < ci->children_num; i++)
3066 {
3067 oconfig_item_t *child = ci->children + i;
3069 #if HAVE_LIBGCRYPT
3070 if (strcasecmp ("AuthFile", child->key) == 0)
3071 cf_util_get_string (child, &se->data.server.auth_file);
3072 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3073 network_config_set_security_level (child,
3074 &se->data.server.security_level);
3075 else
3076 #endif /* HAVE_LIBGCRYPT */
3077 if (strcasecmp ("Interface", child->key) == 0)
3078 network_config_set_interface (child, &se->interface);
3079 else
3080 {
3081 WARNING ("network plugin: Option `%s' is not allowed here.",
3082 child->key);
3083 }
3084 }
3086 #if HAVE_LIBGCRYPT
3087 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
3088 && (se->data.server.auth_file == NULL))
3089 {
3090 ERROR ("network plugin: A security level higher than `none' was "
3091 "requested, but no AuthFile option was given. Cowardly refusing to "
3092 "open this socket!");
3093 sockent_destroy (se);
3094 return (-1);
3095 }
3096 #endif /* HAVE_LIBGCRYPT */
3098 status = sockent_init_crypto (se);
3099 if (status != 0)
3100 {
3101 ERROR ("network plugin: network_config_add_listen: sockent_init_crypto() failed.");
3102 sockent_destroy (se);
3103 return (-1);
3104 }
3106 status = sockent_server_listen (se);
3107 if (status != 0)
3108 {
3109 ERROR ("network plugin: network_config_add_listen: sockent_server_listen failed.");
3110 sockent_destroy (se);
3111 return (-1);
3112 }
3114 status = sockent_add (se);
3115 if (status != 0)
3116 {
3117 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
3118 sockent_destroy (se);
3119 return (-1);
3120 }
3122 return (0);
3123 } /* }}} int network_config_add_listen */
3125 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
3126 {
3127 sockent_t *se;
3128 int status;
3129 int i;
3131 if ((ci->values_num < 1) || (ci->values_num > 2)
3132 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3133 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3134 {
3135 ERROR ("network plugin: The `%s' config option needs "
3136 "one or two string arguments.", ci->key);
3137 return (-1);
3138 }
3140 se = sockent_create (SOCKENT_TYPE_CLIENT);
3141 if (se == NULL)
3142 {
3143 ERROR ("network plugin: sockent_create failed.");
3144 return (-1);
3145 }
3147 se->node = strdup (ci->values[0].value.string);
3148 if (ci->values_num >= 2)
3149 se->service = strdup (ci->values[1].value.string);
3151 for (i = 0; i < ci->children_num; i++)
3152 {
3153 oconfig_item_t *child = ci->children + i;
3155 #if HAVE_LIBGCRYPT
3156 if (strcasecmp ("Username", child->key) == 0)
3157 cf_util_get_string (child, &se->data.client.username);
3158 else if (strcasecmp ("Password", child->key) == 0)
3159 cf_util_get_string (child, &se->data.client.password);
3160 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3161 network_config_set_security_level (child,
3162 &se->data.client.security_level);
3163 else
3164 #endif /* HAVE_LIBGCRYPT */
3165 if (strcasecmp ("Interface", child->key) == 0)
3166 network_config_set_interface (child, &se->interface);
3167 else if (strcasecmp ("ResolveInterval", child->key) == 0)
3168 cf_util_get_cdtime(child, &se->data.client.resolve_interval);
3169 else
3170 {
3171 WARNING ("network plugin: Option `%s' is not allowed here.",
3172 child->key);
3173 }
3174 }
3176 #if HAVE_LIBGCRYPT
3177 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
3178 && ((se->data.client.username == NULL)
3179 || (se->data.client.password == NULL)))
3180 {
3181 ERROR ("network plugin: A security level higher than `none' was "
3182 "requested, but no Username or Password option was given. "
3183 "Cowardly refusing to open this socket!");
3184 sockent_destroy (se);
3185 return (-1);
3186 }
3187 #endif /* HAVE_LIBGCRYPT */
3189 status = sockent_init_crypto (se);
3190 if (status != 0)
3191 {
3192 ERROR ("network plugin: network_config_add_server: sockent_init_crypto() failed.");
3193 sockent_destroy (se);
3194 return (-1);
3195 }
3197 /* No call to sockent_client_connect() here -- it is called from
3198 * network_send_buffer_plain(). */
3200 status = sockent_add (se);
3201 if (status != 0)
3202 {
3203 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
3204 sockent_destroy (se);
3205 return (-1);
3206 }
3208 return (0);
3209 } /* }}} int network_config_add_server */
3211 static int network_config (oconfig_item_t *ci) /* {{{ */
3212 {
3213 int i;
3215 /* The options need to be applied first */
3216 for (i = 0; i < ci->children_num; i++)
3217 {
3218 oconfig_item_t *child = ci->children + i;
3219 if (strcasecmp ("TimeToLive", child->key) == 0)
3220 network_config_set_ttl (child);
3221 }
3223 for (i = 0; i < ci->children_num; i++)
3224 {
3225 oconfig_item_t *child = ci->children + i;
3227 if (strcasecmp ("Listen", child->key) == 0)
3228 network_config_add_listen (child);
3229 else if (strcasecmp ("Server", child->key) == 0)
3230 network_config_add_server (child);
3231 else if (strcasecmp ("TimeToLive", child->key) == 0) {
3232 /* Handled earlier */
3233 }
3234 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
3235 network_config_set_buffer_size (child);
3236 else if (strcasecmp ("Forward", child->key) == 0)
3237 cf_util_get_boolean (child, &network_config_forward);
3238 else if (strcasecmp ("ReportStats", child->key) == 0)
3239 cf_util_get_boolean (child, &network_config_stats);
3240 else
3241 {
3242 WARNING ("network plugin: Option `%s' is not allowed here.",
3243 child->key);
3244 }
3245 }
3247 return (0);
3248 } /* }}} int network_config */
3250 static int network_notification (const notification_t *n,
3251 user_data_t __attribute__((unused)) *user_data)
3252 {
3253 char buffer[network_config_packet_size];
3254 char *buffer_ptr = buffer;
3255 size_t buffer_free = sizeof (buffer);
3256 int status;
3258 if (!check_send_notify_okay (n))
3259 return (0);
3261 memset (buffer, 0, sizeof (buffer));
3263 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME_HR,
3264 (uint64_t) n->time);
3265 if (status != 0)
3266 return (-1);
3268 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
3269 (uint64_t) n->severity);
3270 if (status != 0)
3271 return (-1);
3273 if (strlen (n->host) > 0)
3274 {
3275 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
3276 n->host, strlen (n->host));
3277 if (status != 0)
3278 return (-1);
3279 }
3281 if (strlen (n->plugin) > 0)
3282 {
3283 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
3284 n->plugin, strlen (n->plugin));
3285 if (status != 0)
3286 return (-1);
3287 }
3289 if (strlen (n->plugin_instance) > 0)
3290 {
3291 status = write_part_string (&buffer_ptr, &buffer_free,
3292 TYPE_PLUGIN_INSTANCE,
3293 n->plugin_instance, strlen (n->plugin_instance));
3294 if (status != 0)
3295 return (-1);
3296 }
3298 if (strlen (n->type) > 0)
3299 {
3300 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3301 n->type, strlen (n->type));
3302 if (status != 0)
3303 return (-1);
3304 }
3306 if (strlen (n->type_instance) > 0)
3307 {
3308 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3309 n->type_instance, strlen (n->type_instance));
3310 if (status != 0)
3311 return (-1);
3312 }
3314 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3315 n->message, strlen (n->message));
3316 if (status != 0)
3317 return (-1);
3319 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3321 return (0);
3322 } /* int network_notification */
3324 static int network_shutdown (void)
3325 {
3326 sockent_t *se;
3328 listen_loop++;
3330 /* Kill the listening thread */
3331 if (receive_thread_running != 0)
3332 {
3333 INFO ("network plugin: Stopping receive thread.");
3334 pthread_kill (receive_thread_id, SIGTERM);
3335 pthread_join (receive_thread_id, NULL /* no return value */);
3336 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3337 receive_thread_running = 0;
3338 }
3340 /* Shutdown the dispatching thread */
3341 if (dispatch_thread_running != 0)
3342 {
3343 INFO ("network plugin: Stopping dispatch thread.");
3344 pthread_mutex_lock (&receive_list_lock);
3345 pthread_cond_broadcast (&receive_list_cond);
3346 pthread_mutex_unlock (&receive_list_lock);
3347 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3348 dispatch_thread_running = 0;
3349 }
3351 sockent_destroy (listen_sockets);
3353 if (send_buffer_fill > 0)
3354 flush_buffer ();
3356 sfree (send_buffer);
3358 for (se = sending_sockets; se != NULL; se = se->next)
3359 sockent_client_disconnect (se);
3360 sockent_destroy (sending_sockets);
3362 plugin_unregister_config ("network");
3363 plugin_unregister_init ("network");
3364 plugin_unregister_write ("network");
3365 plugin_unregister_shutdown ("network");
3367 return (0);
3368 } /* int network_shutdown */
3370 static int network_stats_read (void) /* {{{ */
3371 {
3372 derive_t copy_octets_rx;
3373 derive_t copy_octets_tx;
3374 derive_t copy_packets_rx;
3375 derive_t copy_packets_tx;
3376 derive_t copy_values_dispatched;
3377 derive_t copy_values_not_dispatched;
3378 derive_t copy_values_sent;
3379 derive_t copy_values_not_sent;
3380 derive_t copy_receive_list_length;
3381 value_list_t vl = VALUE_LIST_INIT;
3382 value_t values[2];
3384 copy_octets_rx = stats_octets_rx;
3385 copy_octets_tx = stats_octets_tx;
3386 copy_packets_rx = stats_packets_rx;
3387 copy_packets_tx = stats_packets_tx;
3388 copy_values_dispatched = stats_values_dispatched;
3389 copy_values_not_dispatched = stats_values_not_dispatched;
3390 copy_values_sent = stats_values_sent;
3391 copy_values_not_sent = stats_values_not_sent;
3392 copy_receive_list_length = receive_list_length;
3394 /* Initialize `vl' */
3395 vl.values = values;
3396 vl.values_len = 2;
3397 vl.time = 0;
3398 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3399 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3401 /* Octets received / sent */
3402 vl.values[0].derive = (derive_t) copy_octets_rx;
3403 vl.values[1].derive = (derive_t) copy_octets_tx;
3404 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3405 plugin_dispatch_values (&vl);
3407 /* Packets received / send */
3408 vl.values[0].derive = (derive_t) copy_packets_rx;
3409 vl.values[1].derive = (derive_t) copy_packets_tx;
3410 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3411 plugin_dispatch_values (&vl);
3413 /* Values (not) dispatched and (not) send */
3414 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3415 vl.values_len = 1;
3417 vl.values[0].derive = (derive_t) copy_values_dispatched;
3418 sstrncpy (vl.type_instance, "dispatch-accepted",
3419 sizeof (vl.type_instance));
3420 plugin_dispatch_values (&vl);
3422 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3423 sstrncpy (vl.type_instance, "dispatch-rejected",
3424 sizeof (vl.type_instance));
3425 plugin_dispatch_values (&vl);
3427 vl.values[0].derive = (derive_t) copy_values_sent;
3428 sstrncpy (vl.type_instance, "send-accepted",
3429 sizeof (vl.type_instance));
3430 plugin_dispatch_values (&vl);
3432 vl.values[0].derive = (derive_t) copy_values_not_sent;
3433 sstrncpy (vl.type_instance, "send-rejected",
3434 sizeof (vl.type_instance));
3435 plugin_dispatch_values (&vl);
3437 /* Receive queue length */
3438 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3439 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3440 vl.type_instance[0] = 0;
3441 plugin_dispatch_values (&vl);
3443 return (0);
3444 } /* }}} int network_stats_read */
3446 static int network_init (void)
3447 {
3448 static _Bool have_init = 0;
3450 /* Check if we were already initialized. If so, just return - there's
3451 * nothing more to do (for now, that is). */
3452 if (have_init)
3453 return (0);
3454 have_init = 1;
3456 #if HAVE_LIBGCRYPT
3457 network_init_gcrypt ();
3458 #endif
3460 if (network_config_stats)
3461 plugin_register_read ("network", network_stats_read);
3463 plugin_register_shutdown ("network", network_shutdown);
3465 send_buffer = malloc (network_config_packet_size);
3466 if (send_buffer == NULL)
3467 {
3468 ERROR ("network plugin: malloc failed.");
3469 return (-1);
3470 }
3471 network_init_buffer ();
3473 /* setup socket(s) and so on */
3474 if (sending_sockets != NULL)
3475 {
3476 plugin_register_write ("network", network_write,
3477 /* user_data = */ NULL);
3478 plugin_register_notification ("network", network_notification,
3479 /* user_data = */ NULL);
3480 }
3482 /* If no threads need to be started, return here. */
3483 if ((listen_sockets_num == 0)
3484 || ((dispatch_thread_running != 0)
3485 && (receive_thread_running != 0)))
3486 return (0);
3488 if (dispatch_thread_running == 0)
3489 {
3490 int status;
3491 status = plugin_thread_create (&dispatch_thread_id,
3492 NULL /* no attributes */,
3493 dispatch_thread,
3494 NULL /* no argument */);
3495 if (status != 0)
3496 {
3497 char errbuf[1024];
3498 ERROR ("network: pthread_create failed: %s",
3499 sstrerror (errno, errbuf,
3500 sizeof (errbuf)));
3501 }
3502 else
3503 {
3504 dispatch_thread_running = 1;
3505 }
3506 }
3508 if (receive_thread_running == 0)
3509 {
3510 int status;
3511 status = plugin_thread_create (&receive_thread_id,
3512 NULL /* no attributes */,
3513 receive_thread,
3514 NULL /* no argument */);
3515 if (status != 0)
3516 {
3517 char errbuf[1024];
3518 ERROR ("network: pthread_create failed: %s",
3519 sstrerror (errno, errbuf,
3520 sizeof (errbuf)));
3521 }
3522 else
3523 {
3524 receive_thread_running = 1;
3525 }
3526 }
3528 return (0);
3529 } /* int network_init */
3531 /*
3532 * The flush option of the network plugin cannot flush individual identifiers.
3533 * All the values are added to a buffer and sent when the buffer is full, the
3534 * requested value may or may not be in there, it's not worth finding out. We
3535 * just send the buffer if `flush' is called - if the requested value was in
3536 * there, good. If not, well, then there is nothing to flush.. -octo
3537 */
3538 static int network_flush (cdtime_t timeout,
3539 __attribute__((unused)) const char *identifier,
3540 __attribute__((unused)) user_data_t *user_data)
3541 {
3542 pthread_mutex_lock (&send_buffer_lock);
3544 if (send_buffer_fill > 0)
3545 {
3546 if (timeout > 0)
3547 {
3548 cdtime_t now = cdtime ();
3549 if ((send_buffer_last_update + timeout) > now)
3550 {
3551 pthread_mutex_unlock (&send_buffer_lock);
3552 return (0);
3553 }
3554 }
3555 flush_buffer ();
3556 }
3557 pthread_mutex_unlock (&send_buffer_lock);
3559 return (0);
3560 } /* int network_flush */
3562 void module_register (void)
3563 {
3564 plugin_register_complex_config ("network", network_config);
3565 plugin_register_init ("network", network_init);
3566 plugin_register_flush ("network", network_flush,
3567 /* user_data = */ NULL);
3568 } /* void module_register */
3570 /* vim: set fdm=marker : */