2 * collectd - src/network.c
3 * Copyright (C) 2005-2013 Florian octo Forster
4 * Copyright (C) 2009 Aman Gupta
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
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.
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
21 * Florian octo Forster <octo at collectd.org>
22 * Aman Gupta <aman at tmm1.net>
25 #define _DEFAULT_SOURCE
26 #define _BSD_SOURCE /* For struct ip_mreq */
31 #include "configfile.h"
32 #include "utils_fbhash.h"
33 #include "utils_avltree.h"
34 #include "utils_cache.h"
35 #include "utils_complain.h"
46 # include <netinet/in.h>
49 # include <arpa/inet.h>
60 # if defined __APPLE__
61 /* default xcode compiler throws warnings even when deprecated functionality
62 * is not used. -Werror breaks the build because of erroneous warnings.
63 * http://stackoverflow.com/questions/10556299/compiler-warnings-with-libgcrypt-v1-5-0/12830209#12830209
65 # pragma GCC diagnostic ignored "-Wdeprecated-declarations"
67 /* FreeBSD's copy of libgcrypt extends the existing GCRYPT_NO_DEPRECATED
68 * to properly hide all deprecated functionality.
69 * http://svnweb.freebsd.org/ports/head/security/libgcrypt/files/patch-src__gcrypt.h.in
71 # define GCRYPT_NO_DEPRECATED
73 # if defined __APPLE__
74 /* Re enable deprecation warnings */
75 # pragma GCC diagnostic warning "-Wdeprecated-declarations"
77 # if GCRYPT_VERSION_NUMBER < 0x010600
78 GCRY_THREAD_OPTION_PTHREAD_IMPL;
82 #ifndef IPV6_ADD_MEMBERSHIP
83 # ifdef IPV6_JOIN_GROUP
84 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
86 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
88 #endif /* !IP_ADD_MEMBERSHIP */
91 * Maximum size required for encryption / signing:
93 * 42 bytes for the encryption header
94 * + 64 bytes for the username
98 #define BUFF_SIG_SIZE 106
103 #define SECURITY_LEVEL_NONE 0
105 # define SECURITY_LEVEL_SIGN 1
106 # define SECURITY_LEVEL_ENCRYPT 2
108 struct sockent_client
111 struct sockaddr_storage *addr;
117 gcry_cipher_hd_t cypher;
118 unsigned char password_hash[32];
120 cdtime_t next_resolve_reconnect;
121 cdtime_t resolve_interval;
124 struct sockent_server
132 gcry_cipher_hd_t cypher;
136 typedef struct sockent
138 #define SOCKENT_TYPE_CLIENT 1
139 #define SOCKENT_TYPE_SERVER 2
148 struct sockent_client client;
149 struct sockent_server server;
152 struct sockent *next;
155 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
156 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
157 * +-------+-----------------------+-------------------------------+
158 * ! Ver. ! ! Length !
159 * +-------+-----------------------+-------------------------------+
166 typedef struct part_header_s part_header_t;
168 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
169 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
170 * +-------------------------------+-------------------------------+
172 * +-------------------------------+-------------------------------+
173 * : (Length - 4) Bytes :
174 * +---------------------------------------------------------------+
181 typedef struct part_string_s part_string_t;
183 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
184 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
185 * +-------------------------------+-------------------------------+
187 * +-------------------------------+-------------------------------+
188 * : (Length - 4 == 2 || 4 || 8) Bytes :
189 * +---------------------------------------------------------------+
196 typedef struct part_number_s part_number_t;
198 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
199 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
200 * +-------------------------------+-------------------------------+
202 * +-------------------------------+---------------+---------------+
203 * ! Num of values ! Type0 ! Type1 !
204 * +-------------------------------+---------------+---------------+
207 * +---------------------------------------------------------------+
210 * +---------------------------------------------------------------+
215 uint16_t *num_values;
216 uint8_t *values_types;
219 typedef struct part_values_s part_values_t;
221 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
222 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
223 * +-------------------------------+-------------------------------+
225 * +-------------------------------+-------------------------------+
226 * ! Hash (Bits 0 - 31) !
228 * ! Hash (Bits 224 - 255) !
229 * +---------------------------------------------------------------+
232 #define PART_SIGNATURE_SHA256_SIZE 36
233 struct part_signature_sha256_s
236 unsigned char hash[32];
239 typedef struct part_signature_sha256_s part_signature_sha256_t;
241 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
242 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
243 * +-------------------------------+-------------------------------+
245 * +-------------------------------+-------------------------------+
246 * ! Original length ! Padding (0 - 15 bytes) !
247 * +-------------------------------+-------------------------------+
248 * ! Hash (Bits 0 - 31) !
250 * ! Hash (Bits 128 - 159) !
251 * +---------------------------------------------------------------+
254 #define PART_ENCRYPTION_AES256_SIZE 42
255 struct part_encryption_aes256_s
258 uint16_t username_length;
260 unsigned char iv[16];
262 unsigned char hash[20];
266 typedef struct part_encryption_aes256_s part_encryption_aes256_t;
268 struct receive_list_entry_s
273 struct receive_list_entry_s *next;
275 typedef struct receive_list_entry_s receive_list_entry_t;
280 static int network_config_ttl = 0;
281 /* Ethernet - (IPv6 + UDP) = 1500 - (40 + 8) = 1452 */
282 static size_t network_config_packet_size = 1452;
283 static _Bool network_config_forward = 0;
284 static _Bool network_config_stats = 0;
286 static sockent_t *sending_sockets = NULL;
288 static receive_list_entry_t *receive_list_head = NULL;
289 static receive_list_entry_t *receive_list_tail = NULL;
290 static pthread_mutex_t receive_list_lock = PTHREAD_MUTEX_INITIALIZER;
291 static pthread_cond_t receive_list_cond = PTHREAD_COND_INITIALIZER;
292 static uint64_t receive_list_length = 0;
294 static sockent_t *listen_sockets = NULL;
295 static struct pollfd *listen_sockets_pollfd = NULL;
296 static size_t listen_sockets_num = 0;
298 /* The receive and dispatch threads will run as long as `listen_loop' is set to
300 static int listen_loop = 0;
301 static int receive_thread_running = 0;
302 static pthread_t receive_thread_id;
303 static int dispatch_thread_running = 0;
304 static pthread_t dispatch_thread_id;
306 /* Buffer in which to-be-sent network packets are constructed. */
307 static char *send_buffer;
308 static char *send_buffer_ptr;
309 static int send_buffer_fill;
310 static cdtime_t send_buffer_last_update;
311 static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
312 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
314 /* XXX: These counters are incremented from one place only. The spot in which
315 * the values are incremented is either only reachable by one thread (the
316 * dispatch thread, for example) or locked by some lock (send_buffer_lock for
317 * example). Only if neither is true, the stats_lock is acquired. The counters
318 * are always read without holding a lock in the hope that writing 8 bytes to
319 * memory is an atomic operation. */
320 static derive_t stats_octets_rx = 0;
321 static derive_t stats_octets_tx = 0;
322 static derive_t stats_packets_rx = 0;
323 static derive_t stats_packets_tx = 0;
324 static derive_t stats_values_dispatched = 0;
325 static derive_t stats_values_not_dispatched = 0;
326 static derive_t stats_values_sent = 0;
327 static derive_t stats_values_not_sent = 0;
328 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
333 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
335 uint64_t time_sent = 0;
338 status = uc_meta_data_get_unsigned_int (vl,
339 "network:time_sent", &time_sent);
341 /* This is a value we already sent. Don't allow it to be received again in
342 * order to avoid looping. */
343 if ((status == 0) && (time_sent >= ((uint64_t) vl->time)))
347 } /* }}} _Bool check_receive_okay */
349 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
354 if (network_config_forward)
357 if (vl->meta == NULL)
360 status = meta_data_get_boolean (vl->meta, "network:received", &received);
361 if (status == -ENOENT)
363 else if (status != 0)
365 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
366 "with status %i.", status);
370 /* By default, only *send* value lists that were not *received* by the
373 } /* }}} _Bool check_send_okay */
375 static _Bool check_notify_received (const notification_t *n) /* {{{ */
377 notification_meta_t *ptr;
379 for (ptr = n->meta; ptr != NULL; ptr = ptr->next)
380 if ((strcmp ("network:received", ptr->name) == 0)
381 && (ptr->type == NM_TYPE_BOOLEAN))
382 return ((_Bool) ptr->nm_value.nm_boolean);
385 } /* }}} _Bool check_notify_received */
387 static _Bool check_send_notify_okay (const notification_t *n) /* {{{ */
389 static c_complain_t complain_forwarding = C_COMPLAIN_INIT_STATIC;
395 received = check_notify_received (n);
397 if (network_config_forward && received)
399 c_complain_once (LOG_ERR, &complain_forwarding,
400 "network plugin: A notification has been received via the network "
401 "and forwarding is enabled. Forwarding of notifications is currently "
402 "not supported, because there is not loop-deteciton available. "
403 "Please contact the collectd mailing list if you need this "
407 /* By default, only *send* value lists that were not *received* by the
410 } /* }}} _Bool check_send_notify_okay */
412 static int network_dispatch_values (value_list_t *vl, /* {{{ */
413 const char *username)
418 || (strlen (vl->host) <= 0)
419 || (strlen (vl->plugin) <= 0)
420 || (strlen (vl->type) <= 0))
423 if (!check_receive_okay (vl))
426 char name[6*DATA_MAX_NAME_LEN];
427 FORMAT_VL (name, sizeof (name), vl);
428 name[sizeof (name) - 1] = 0;
429 DEBUG ("network plugin: network_dispatch_values: "
430 "NOT dispatching %s.", name);
432 stats_values_not_dispatched++;
436 assert (vl->meta == NULL);
438 vl->meta = meta_data_create ();
439 if (vl->meta == NULL)
441 ERROR ("network plugin: meta_data_create failed.");
445 status = meta_data_add_boolean (vl->meta, "network:received", 1);
448 ERROR ("network plugin: meta_data_add_boolean failed.");
449 meta_data_destroy (vl->meta);
454 if (username != NULL)
456 status = meta_data_add_string (vl->meta, "network:username", username);
459 ERROR ("network plugin: meta_data_add_string failed.");
460 meta_data_destroy (vl->meta);
466 plugin_dispatch_values (vl);
467 stats_values_dispatched++;
469 meta_data_destroy (vl->meta);
473 } /* }}} int network_dispatch_values */
475 static int network_dispatch_notification (notification_t *n) /* {{{ */
479 assert (n->meta == NULL);
481 status = plugin_notification_meta_add_boolean (n, "network:received", 1);
484 ERROR ("network plugin: plugin_notification_meta_add_boolean failed.");
485 plugin_notification_meta_free (n->meta);
490 status = plugin_dispatch_notification (n);
492 plugin_notification_meta_free (n->meta);
496 } /* }}} int network_dispatch_notification */
499 static void network_init_gcrypt (void) /* {{{ */
501 /* http://lists.gnupg.org/pipermail/gcrypt-devel/2003-August/000458.html
502 * Because you can't know in a library whether another library has
503 * already initialized the library */
504 if (gcry_control (GCRYCTL_ANY_INITIALIZATION_P))
507 /* http://www.gnupg.org/documentation/manuals/gcrypt/Multi_002dThreading.html
508 * To ensure thread-safety, it's important to set GCRYCTL_SET_THREAD_CBS
509 * *before* initalizing Libgcrypt with gcry_check_version(), which itself must
510 * be called before any other gcry_* function. GCRYCTL_ANY_INITIALIZATION_P
511 * above doesn't count, as it doesn't implicitly initalize Libgcrypt.
513 * tl;dr: keep all these gry_* statements in this exact order please. */
514 # if GCRYPT_VERSION_NUMBER < 0x010600
515 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
517 gcry_check_version (NULL);
518 gcry_control (GCRYCTL_INIT_SECMEM, 32768);
519 gcry_control (GCRYCTL_INITIALIZATION_FINISHED);
520 } /* }}} void network_init_gcrypt */
522 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
523 const void *iv, size_t iv_size, const char *username)
526 gcry_cipher_hd_t *cyper_ptr;
527 unsigned char password_hash[32];
529 if (se->type == SOCKENT_TYPE_CLIENT)
531 cyper_ptr = &se->data.client.cypher;
532 memcpy (password_hash, se->data.client.password_hash,
533 sizeof (password_hash));
539 cyper_ptr = &se->data.server.cypher;
541 if (username == NULL)
544 secret = fbh_get (se->data.server.userdb, username);
548 gcry_md_hash_buffer (GCRY_MD_SHA256,
550 secret, strlen (secret));
555 if (*cyper_ptr == NULL)
557 err = gcry_cipher_open (cyper_ptr,
558 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
561 ERROR ("network plugin: gcry_cipher_open returned: %s",
562 gcry_strerror (err));
569 gcry_cipher_reset (*cyper_ptr);
571 assert (*cyper_ptr != NULL);
573 err = gcry_cipher_setkey (*cyper_ptr,
574 password_hash, sizeof (password_hash));
577 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
578 gcry_strerror (err));
579 gcry_cipher_close (*cyper_ptr);
584 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
587 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
588 gcry_strerror (err));
589 gcry_cipher_close (*cyper_ptr);
595 } /* }}} int network_get_aes256_cypher */
596 #endif /* HAVE_LIBGCRYPT */
598 static int write_part_values (char **ret_buffer, int *ret_buffer_len,
599 const data_set_t *ds, const value_list_t *vl)
605 part_header_t pkg_ph;
606 uint16_t pkg_num_values;
607 uint8_t *pkg_values_types;
613 num_values = vl->values_len;
614 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
615 + (num_values * sizeof (uint8_t))
616 + (num_values * sizeof (value_t));
618 if (*ret_buffer_len < packet_len)
621 pkg_values_types = (uint8_t *) malloc (num_values * sizeof (uint8_t));
622 if (pkg_values_types == NULL)
624 ERROR ("network plugin: write_part_values: malloc failed.");
628 pkg_values = (value_t *) malloc (num_values * sizeof (value_t));
629 if (pkg_values == NULL)
631 free (pkg_values_types);
632 ERROR ("network plugin: write_part_values: malloc failed.");
636 pkg_ph.type = htons (TYPE_VALUES);
637 pkg_ph.length = htons (packet_len);
639 pkg_num_values = htons ((uint16_t) vl->values_len);
641 for (i = 0; i < num_values; i++)
643 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
644 switch (ds->ds[i].type)
646 case DS_TYPE_COUNTER:
647 pkg_values[i].counter = htonll (vl->values[i].counter);
651 pkg_values[i].gauge = htond (vl->values[i].gauge);
655 pkg_values[i].derive = htonll (vl->values[i].derive);
658 case DS_TYPE_ABSOLUTE:
659 pkg_values[i].absolute = htonll (vl->values[i].absolute);
663 free (pkg_values_types);
665 ERROR ("network plugin: write_part_values: "
666 "Unknown data source type: %i",
669 } /* switch (ds->ds[i].type) */
670 } /* for (num_values) */
673 * Use `memcpy' to write everything to the buffer, because the pointer
674 * may be unaligned and some architectures, such as SPARC, can't handle
677 packet_ptr = *ret_buffer;
679 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
680 offset += sizeof (pkg_ph);
681 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
682 offset += sizeof (pkg_num_values);
683 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
684 offset += num_values * sizeof (uint8_t);
685 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
686 offset += num_values * sizeof (value_t);
688 assert (offset == packet_len);
690 *ret_buffer = packet_ptr + packet_len;
691 *ret_buffer_len -= packet_len;
693 free (pkg_values_types);
697 } /* int write_part_values */
699 static int write_part_number (char **ret_buffer, int *ret_buffer_len,
700 int type, uint64_t value)
705 part_header_t pkg_head;
710 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
712 if (*ret_buffer_len < packet_len)
715 pkg_head.type = htons (type);
716 pkg_head.length = htons (packet_len);
717 pkg_value = htonll (value);
719 packet_ptr = *ret_buffer;
721 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
722 offset += sizeof (pkg_head);
723 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
724 offset += sizeof (pkg_value);
726 assert (offset == packet_len);
728 *ret_buffer = packet_ptr + packet_len;
729 *ret_buffer_len -= packet_len;
732 } /* int write_part_number */
734 static int write_part_string (char **ret_buffer, int *ret_buffer_len,
735 int type, const char *str, int str_len)
745 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
746 if (*ret_buffer_len < buffer_len)
749 pkg_type = htons (type);
750 pkg_length = htons (buffer_len);
752 buffer = *ret_buffer;
754 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
755 offset += sizeof (pkg_type);
756 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
757 offset += sizeof (pkg_length);
758 memcpy (buffer + offset, str, str_len);
760 memset (buffer + offset, '\0', 1);
763 assert (offset == buffer_len);
765 *ret_buffer = buffer + buffer_len;
766 *ret_buffer_len -= buffer_len;
769 } /* int write_part_string */
771 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
772 value_t **ret_values, size_t *ret_num_values)
774 char *buffer = *ret_buffer;
775 size_t buffer_len = *ret_buffer_len;
790 NOTICE ("network plugin: packet is too short: "
791 "buffer_len = %zu", buffer_len);
795 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
796 buffer += sizeof (tmp16);
797 pkg_type = ntohs (tmp16);
799 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
800 buffer += sizeof (tmp16);
801 pkg_length = ntohs (tmp16);
803 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
804 buffer += sizeof (tmp16);
805 pkg_numval = ntohs (tmp16);
807 assert (pkg_type == TYPE_VALUES);
809 exp_size = 3 * sizeof (uint16_t)
810 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
811 if (buffer_len < exp_size)
813 WARNING ("network plugin: parse_part_values: "
815 "Chunk of size %zu expected, "
816 "but buffer has only %zu bytes left.",
817 exp_size, buffer_len);
821 if (pkg_length != exp_size)
823 WARNING ("network plugin: parse_part_values: "
824 "Length and number of values "
825 "in the packet don't match.");
829 pkg_types = (uint8_t *) malloc (pkg_numval * sizeof (uint8_t));
830 pkg_values = (value_t *) malloc (pkg_numval * sizeof (value_t));
831 if ((pkg_types == NULL) || (pkg_values == NULL))
835 ERROR ("network plugin: parse_part_values: malloc failed.");
839 memcpy ((void *) pkg_types, (void *) buffer, pkg_numval * sizeof (uint8_t));
840 buffer += pkg_numval * sizeof (uint8_t);
841 memcpy ((void *) pkg_values, (void *) buffer, pkg_numval * sizeof (value_t));
842 buffer += pkg_numval * sizeof (value_t);
844 for (i = 0; i < pkg_numval; i++)
846 switch (pkg_types[i])
848 case DS_TYPE_COUNTER:
849 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
853 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
857 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
860 case DS_TYPE_ABSOLUTE:
861 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
865 NOTICE ("network plugin: parse_part_values: "
866 "Don't know how to handle data source type %"PRIu8,
871 } /* switch (pkg_types[i]) */
874 *ret_buffer = buffer;
875 *ret_buffer_len = buffer_len - pkg_length;
876 *ret_num_values = (size_t) pkg_numval;
877 *ret_values = pkg_values;
882 } /* int parse_part_values */
884 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
887 char *buffer = *ret_buffer;
888 size_t buffer_len = *ret_buffer_len;
892 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
896 if (buffer_len < exp_size)
898 WARNING ("network plugin: parse_part_number: "
900 "Chunk of size %zu expected, "
901 "but buffer has only %zu bytes left.",
902 exp_size, buffer_len);
906 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
907 buffer += sizeof (tmp16);
908 /* pkg_type = ntohs (tmp16); */
910 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
911 buffer += sizeof (tmp16);
912 pkg_length = ntohs (tmp16);
914 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
915 buffer += sizeof (tmp64);
916 *value = ntohll (tmp64);
918 *ret_buffer = buffer;
919 *ret_buffer_len = buffer_len - pkg_length;
922 } /* int parse_part_number */
924 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
925 char *output, size_t const output_len)
927 char *buffer = *ret_buffer;
928 size_t buffer_len = *ret_buffer_len;
931 size_t const header_size = 2 * sizeof (uint16_t);
939 if (buffer_len < header_size)
941 WARNING ("network plugin: parse_part_string: "
943 "Chunk of at least size %zu expected, "
944 "but buffer has only %zu bytes left.",
945 header_size, buffer_len);
949 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
950 buffer += sizeof (tmp16);
951 /* pkg_type = ntohs (tmp16); */
953 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
954 buffer += sizeof (tmp16);
955 pkg_length = ntohs (tmp16);
956 payload_size = ((size_t) pkg_length) - header_size;
958 /* Check that packet fits in the input buffer */
959 if (pkg_length > buffer_len)
961 WARNING ("network plugin: parse_part_string: "
963 "Chunk of size %"PRIu16" received, "
964 "but buffer has only %zu bytes left.",
965 pkg_length, buffer_len);
969 /* Check that pkg_length is in the valid range */
970 if (pkg_length <= header_size)
972 WARNING ("network plugin: parse_part_string: "
974 "Header claims this packet is only %hu "
975 "bytes long.", pkg_length);
979 /* Check that the package data fits into the output buffer.
980 * The previous if-statement ensures that:
981 * `pkg_length > header_size' */
982 if (output_len < payload_size)
984 WARNING ("network plugin: parse_part_string: "
986 "Output buffer holds %zu bytes, "
987 "which is too small to hold the received "
989 output_len, payload_size);
993 /* All sanity checks successfull, let's copy the data over */
994 memcpy ((void *) output, (void *) buffer, payload_size);
995 buffer += payload_size;
997 /* For some very weird reason '\0' doesn't do the trick on SPARC in
999 if (output[payload_size - 1] != 0)
1001 WARNING ("network plugin: parse_part_string: "
1002 "Received string does not end "
1003 "with a NULL-byte.");
1007 *ret_buffer = buffer;
1008 *ret_buffer_len = buffer_len - pkg_length;
1011 } /* int parse_part_string */
1013 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
1014 * parse_packet and vice versa. */
1015 #define PP_SIGNED 0x01
1016 #define PP_ENCRYPTED 0x02
1017 static int parse_packet (sockent_t *se,
1018 void *buffer, size_t buffer_size, int flags,
1019 const char *username);
1021 #define BUFFER_READ(p,s) do { \
1022 memcpy ((p), buffer + buffer_offset, (s)); \
1023 buffer_offset += (s); \
1027 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1028 void **ret_buffer, size_t *ret_buffer_len, int flags)
1030 static c_complain_t complain_no_users = C_COMPLAIN_INIT_STATIC;
1034 size_t buffer_offset;
1036 size_t username_len;
1039 part_signature_sha256_t pss;
1040 uint16_t pss_head_length;
1041 char hash[sizeof (pss.hash)];
1045 unsigned char *hash_ptr;
1047 buffer = *ret_buffer;
1048 buffer_len = *ret_buffer_len;
1051 if (se->data.server.userdb == NULL)
1053 c_complain (LOG_NOTICE, &complain_no_users,
1054 "network plugin: Received signed network packet but can't verify it "
1055 "because no user DB has been configured. Will accept it.");
1059 /* Check if the buffer has enough data for this structure. */
1060 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
1063 /* Read type and length header */
1064 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1065 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1066 pss_head_length = ntohs (pss.head.length);
1068 /* Check if the `pss_head_length' is within bounds. */
1069 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
1070 || (pss_head_length > buffer_len))
1072 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
1076 /* Copy the hash. */
1077 BUFFER_READ (pss.hash, sizeof (pss.hash));
1079 /* Calculate username length (without null byte) and allocate memory */
1080 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
1081 pss.username = malloc (username_len + 1);
1082 if (pss.username == NULL)
1085 /* Read the username */
1086 BUFFER_READ (pss.username, username_len);
1087 pss.username[username_len] = 0;
1089 assert (buffer_offset == pss_head_length);
1091 /* Query the password */
1092 secret = fbh_get (se->data.server.userdb, pss.username);
1095 ERROR ("network plugin: Unknown user: %s", pss.username);
1096 sfree (pss.username);
1100 /* Create a hash device and check the HMAC */
1102 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
1105 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
1106 gcry_strerror (err));
1108 sfree (pss.username);
1112 err = gcry_md_setkey (hd, secret, strlen (secret));
1115 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
1118 sfree (pss.username);
1123 buffer + PART_SIGNATURE_SHA256_SIZE,
1124 buffer_len - PART_SIGNATURE_SHA256_SIZE);
1125 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
1126 if (hash_ptr == NULL)
1128 ERROR ("network plugin: gcry_md_read failed.");
1131 sfree (pss.username);
1134 memcpy (hash, hash_ptr, sizeof (hash));
1140 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1142 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1147 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1148 flags | PP_SIGNED, pss.username);
1152 sfree (pss.username);
1154 *ret_buffer = buffer + buffer_len;
1155 *ret_buffer_len = 0;
1158 } /* }}} int parse_part_sign_sha256 */
1159 /* #endif HAVE_LIBGCRYPT */
1161 #else /* if !HAVE_LIBGCRYPT */
1162 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1163 void **ret_buffer, size_t *ret_buffer_size, int flags)
1165 static int warning_has_been_printed = 0;
1169 size_t buffer_offset;
1172 part_signature_sha256_t pss;
1174 buffer = *ret_buffer;
1175 buffer_size = *ret_buffer_size;
1178 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1181 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1182 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1183 part_len = ntohs (pss.head.length);
1185 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1186 || (part_len > buffer_size))
1189 if (warning_has_been_printed == 0)
1191 WARNING ("network plugin: Received signed packet, but the network "
1192 "plugin was not linked with libgcrypt, so I cannot "
1193 "verify the signature. The packet will be accepted.");
1194 warning_has_been_printed = 1;
1197 parse_packet (se, buffer + part_len, buffer_size - part_len, flags,
1198 /* username = */ NULL);
1200 *ret_buffer = buffer + buffer_size;
1201 *ret_buffer_size = 0;
1204 } /* }}} int parse_part_sign_sha256 */
1205 #endif /* !HAVE_LIBGCRYPT */
1208 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1209 void **ret_buffer, size_t *ret_buffer_len,
1212 char *buffer = *ret_buffer;
1213 size_t buffer_len = *ret_buffer_len;
1216 size_t buffer_offset;
1217 uint16_t username_len;
1218 part_encryption_aes256_t pea;
1219 unsigned char hash[sizeof (pea.hash)];
1221 gcry_cipher_hd_t cypher;
1224 /* Make sure at least the header if available. */
1225 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1227 NOTICE ("network plugin: parse_part_encr_aes256: "
1228 "Discarding short packet.");
1234 /* Copy the unencrypted information into `pea'. */
1235 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1236 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1238 /* Check the `part size'. */
1239 part_size = ntohs (pea.head.length);
1240 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1241 || (part_size > buffer_len))
1243 NOTICE ("network plugin: parse_part_encr_aes256: "
1244 "Discarding part with invalid size.");
1248 /* Read the username */
1249 BUFFER_READ (&username_len, sizeof (username_len));
1250 username_len = ntohs (username_len);
1252 if ((username_len <= 0)
1253 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1255 NOTICE ("network plugin: parse_part_encr_aes256: "
1256 "Discarding part with invalid username length.");
1260 assert (username_len > 0);
1261 pea.username = malloc (username_len + 1);
1262 if (pea.username == NULL)
1264 BUFFER_READ (pea.username, username_len);
1265 pea.username[username_len] = 0;
1267 /* Last but not least, the initialization vector */
1268 BUFFER_READ (pea.iv, sizeof (pea.iv));
1270 /* Make sure we are at the right position */
1271 assert (buffer_offset == (username_len +
1272 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1274 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1278 sfree (pea.username);
1282 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1283 assert (payload_len > 0);
1285 /* Decrypt the packet in-place */
1286 err = gcry_cipher_decrypt (cypher,
1287 buffer + buffer_offset,
1288 part_size - buffer_offset,
1289 /* in = */ NULL, /* in len = */ 0);
1292 sfree (pea.username);
1293 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1294 gcry_strerror (err));
1299 BUFFER_READ (pea.hash, sizeof (pea.hash));
1301 /* Make sure we're at the right position - again */
1302 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1303 assert (buffer_offset == (part_size - payload_len));
1305 /* Check hash sum */
1306 memset (hash, 0, sizeof (hash));
1307 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1308 buffer + buffer_offset, payload_len);
1309 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1311 sfree (pea.username);
1312 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1316 parse_packet (se, buffer + buffer_offset, payload_len,
1317 flags | PP_ENCRYPTED, pea.username);
1319 /* XXX: Free pea.username?!? */
1321 /* Update return values */
1322 *ret_buffer = buffer + part_size;
1323 *ret_buffer_len = buffer_len - part_size;
1325 sfree (pea.username);
1328 } /* }}} int parse_part_encr_aes256 */
1329 /* #endif HAVE_LIBGCRYPT */
1331 #else /* if !HAVE_LIBGCRYPT */
1332 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1333 void **ret_buffer, size_t *ret_buffer_size, int flags)
1335 static int warning_has_been_printed = 0;
1339 size_t buffer_offset;
1344 buffer = *ret_buffer;
1345 buffer_size = *ret_buffer_size;
1348 /* parse_packet assures this minimum size. */
1349 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1351 BUFFER_READ (&ph.type, sizeof (ph.type));
1352 BUFFER_READ (&ph.length, sizeof (ph.length));
1353 ph_length = ntohs (ph.length);
1355 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1356 || (ph_length > buffer_size))
1358 ERROR ("network plugin: AES-256 encrypted part "
1359 "with invalid length received.");
1363 if (warning_has_been_printed == 0)
1365 WARNING ("network plugin: Received encrypted packet, but the network "
1366 "plugin was not linked with libgcrypt, so I cannot "
1367 "decrypt it. The part will be discarded.");
1368 warning_has_been_printed = 1;
1371 *ret_buffer += ph_length;
1372 *ret_buffer_size -= ph_length;
1375 } /* }}} int parse_part_encr_aes256 */
1376 #endif /* !HAVE_LIBGCRYPT */
1380 static int parse_packet (sockent_t *se, /* {{{ */
1381 void *buffer, size_t buffer_size, int flags,
1382 const char *username)
1386 value_list_t vl = VALUE_LIST_INIT;
1390 int packet_was_signed = (flags & PP_SIGNED);
1391 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1392 int printed_ignore_warning = 0;
1393 #endif /* HAVE_LIBGCRYPT */
1396 memset (&vl, '\0', sizeof (vl));
1397 memset (&n, '\0', sizeof (n));
1400 while ((status == 0) && (0 < buffer_size)
1401 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1403 uint16_t pkg_length;
1406 memcpy ((void *) &pkg_type,
1409 memcpy ((void *) &pkg_length,
1410 (void *) (buffer + sizeof (pkg_type)),
1411 sizeof (pkg_length));
1413 pkg_length = ntohs (pkg_length);
1414 pkg_type = ntohs (pkg_type);
1416 if (pkg_length > buffer_size)
1418 /* Ensure that this loop terminates eventually */
1419 if (pkg_length < (2 * sizeof (uint16_t)))
1422 if (pkg_type == TYPE_ENCR_AES256)
1424 status = parse_part_encr_aes256 (se,
1425 &buffer, &buffer_size, flags);
1428 ERROR ("network plugin: Decrypting AES256 "
1430 "with status %i.", status);
1435 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1436 && (packet_was_encrypted == 0))
1438 if (printed_ignore_warning == 0)
1440 INFO ("network plugin: Unencrypted packet or "
1441 "part has been ignored.");
1442 printed_ignore_warning = 1;
1444 buffer = ((char *) buffer) + pkg_length;
1447 #endif /* HAVE_LIBGCRYPT */
1448 else if (pkg_type == TYPE_SIGN_SHA256)
1450 status = parse_part_sign_sha256 (se,
1451 &buffer, &buffer_size, flags);
1454 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1456 "with status %i.", status);
1461 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1462 && (packet_was_encrypted == 0)
1463 && (packet_was_signed == 0))
1465 if (printed_ignore_warning == 0)
1467 INFO ("network plugin: Unsigned packet or "
1468 "part has been ignored.");
1469 printed_ignore_warning = 1;
1471 buffer = ((char *) buffer) + pkg_length;
1474 #endif /* HAVE_LIBGCRYPT */
1475 else if (pkg_type == TYPE_VALUES)
1477 status = parse_part_values (&buffer, &buffer_size,
1478 &vl.values, &vl.values_len);
1482 network_dispatch_values (&vl, username);
1486 else if (pkg_type == TYPE_TIME)
1489 status = parse_part_number (&buffer, &buffer_size,
1493 vl.time = TIME_T_TO_CDTIME_T (tmp);
1494 n.time = TIME_T_TO_CDTIME_T (tmp);
1497 else if (pkg_type == TYPE_TIME_HR)
1500 status = parse_part_number (&buffer, &buffer_size,
1504 vl.time = (cdtime_t) tmp;
1505 n.time = (cdtime_t) tmp;
1508 else if (pkg_type == TYPE_INTERVAL)
1511 status = parse_part_number (&buffer, &buffer_size,
1514 vl.interval = TIME_T_TO_CDTIME_T (tmp);
1516 else if (pkg_type == TYPE_INTERVAL_HR)
1519 status = parse_part_number (&buffer, &buffer_size,
1522 vl.interval = (cdtime_t) tmp;
1524 else if (pkg_type == TYPE_HOST)
1526 status = parse_part_string (&buffer, &buffer_size,
1527 vl.host, sizeof (vl.host));
1529 sstrncpy (n.host, vl.host, sizeof (n.host));
1531 else if (pkg_type == TYPE_PLUGIN)
1533 status = parse_part_string (&buffer, &buffer_size,
1534 vl.plugin, sizeof (vl.plugin));
1536 sstrncpy (n.plugin, vl.plugin,
1539 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1541 status = parse_part_string (&buffer, &buffer_size,
1543 sizeof (vl.plugin_instance));
1545 sstrncpy (n.plugin_instance,
1547 sizeof (n.plugin_instance));
1549 else if (pkg_type == TYPE_TYPE)
1551 status = parse_part_string (&buffer, &buffer_size,
1552 vl.type, sizeof (vl.type));
1554 sstrncpy (n.type, vl.type, sizeof (n.type));
1556 else if (pkg_type == TYPE_TYPE_INSTANCE)
1558 status = parse_part_string (&buffer, &buffer_size,
1560 sizeof (vl.type_instance));
1562 sstrncpy (n.type_instance, vl.type_instance,
1563 sizeof (n.type_instance));
1565 else if (pkg_type == TYPE_MESSAGE)
1567 status = parse_part_string (&buffer, &buffer_size,
1568 n.message, sizeof (n.message));
1574 else if ((n.severity != NOTIF_FAILURE)
1575 && (n.severity != NOTIF_WARNING)
1576 && (n.severity != NOTIF_OKAY))
1578 INFO ("network plugin: "
1579 "Ignoring notification with "
1580 "unknown severity %i.",
1583 else if (n.time <= 0)
1585 INFO ("network plugin: "
1586 "Ignoring notification with "
1589 else if (strlen (n.message) <= 0)
1591 INFO ("network plugin: "
1592 "Ignoring notification with "
1593 "an empty message.");
1597 network_dispatch_notification (&n);
1600 else if (pkg_type == TYPE_SEVERITY)
1603 status = parse_part_number (&buffer, &buffer_size,
1606 n.severity = (int) tmp;
1610 DEBUG ("network plugin: parse_packet: Unknown part"
1611 " type: 0x%04hx", pkg_type);
1612 buffer = ((char *) buffer) + pkg_length;
1614 } /* while (buffer_size > sizeof (part_header_t)) */
1616 if (status == 0 && buffer_size > 0)
1617 WARNING ("network plugin: parse_packet: Received truncated "
1618 "packet, try increasing `MaxPacketSize'");
1621 } /* }}} int parse_packet */
1623 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1632 sfree (sec->username);
1633 sfree (sec->password);
1634 if (sec->cypher != NULL)
1635 gcry_cipher_close (sec->cypher);
1637 } /* }}} void free_sockent_client */
1639 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1643 for (i = 0; i < ses->fd_num; i++)
1645 if (ses->fd[i] >= 0)
1654 sfree (ses->auth_file);
1655 fbh_destroy (ses->userdb);
1656 if (ses->cypher != NULL)
1657 gcry_cipher_close (ses->cypher);
1659 } /* }}} void free_sockent_server */
1661 static void sockent_destroy (sockent_t *se) /* {{{ */
1665 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1672 sfree (se->service);
1674 if (se->type == SOCKENT_TYPE_CLIENT)
1675 free_sockent_client (&se->data.client);
1677 free_sockent_server (&se->data.server);
1682 } /* }}} void sockent_destroy */
1685 * int network_set_ttl
1687 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1688 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1690 * The `struct addrinfo' is used to destinguish between unicast and multicast
1693 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1695 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1696 network_config_ttl);
1698 assert (se->type == SOCKENT_TYPE_CLIENT);
1700 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1703 if (ai->ai_family == AF_INET)
1705 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1708 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1709 optname = IP_MULTICAST_TTL;
1713 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1714 &network_config_ttl,
1715 sizeof (network_config_ttl)) != 0)
1718 ERROR ("network plugin: setsockopt (ipv4-ttl): %s",
1719 sstrerror (errno, errbuf, sizeof (errbuf)));
1723 else if (ai->ai_family == AF_INET6)
1725 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1726 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1729 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1730 optname = IPV6_MULTICAST_HOPS;
1732 optname = IPV6_UNICAST_HOPS;
1734 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1735 &network_config_ttl,
1736 sizeof (network_config_ttl)) != 0)
1739 ERROR ("network plugin: setsockopt(ipv6-ttl): %s",
1740 sstrerror (errno, errbuf,
1747 } /* int network_set_ttl */
1749 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1751 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1754 assert (se->type == SOCKENT_TYPE_CLIENT);
1756 if (ai->ai_family == AF_INET)
1758 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1760 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1762 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1763 /* If possible, use the "ip_mreqn" structure which has
1764 * an "interface index" member. Using the interface
1765 * index is preferred here, because of its similarity
1766 * to the way IPv6 handles this. Unfortunately, it
1767 * appears not to be portable. */
1768 struct ip_mreqn mreq;
1770 memset (&mreq, 0, sizeof (mreq));
1771 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1772 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1773 mreq.imr_ifindex = se->interface;
1775 struct ip_mreq mreq;
1777 memset (&mreq, 0, sizeof (mreq));
1778 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1779 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1782 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1783 &mreq, sizeof (mreq)) != 0)
1786 ERROR ("network plugin: setsockopt (ipv4-multicast-if): %s",
1787 sstrerror (errno, errbuf, sizeof (errbuf)));
1794 else if (ai->ai_family == AF_INET6)
1796 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1798 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1800 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1802 sizeof (se->interface)) != 0)
1805 ERROR ("network plugin: setsockopt (ipv6-multicast-if): %s",
1806 sstrerror (errno, errbuf,
1815 /* else: Not a multicast interface. */
1816 if (se->interface != 0)
1818 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1819 char interface_name[IFNAMSIZ];
1821 if (if_indextoname (se->interface, interface_name) == NULL)
1824 DEBUG ("network plugin: Binding socket to interface %s", interface_name);
1826 if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
1828 sizeof(interface_name)) == -1 )
1831 ERROR ("network plugin: setsockopt (bind-if): %s",
1832 sstrerror (errno, errbuf, sizeof (errbuf)));
1835 /* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1838 WARNING ("network plugin: Cannot set the interface on a unicast "
1840 # if !defined(SO_BINDTODEVICE)
1841 "the \"SO_BINDTODEVICE\" socket option "
1843 "the \"if_indextoname\" function "
1845 "is not available on your system.");
1851 } /* }}} network_set_interface */
1853 static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
1862 /* allow multiple sockets to use the same PORT number */
1863 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1864 &yes, sizeof(yes)) == -1) {
1866 ERROR ("network plugin: setsockopt (reuseaddr): %s",
1867 sstrerror (errno, errbuf, sizeof (errbuf)));
1871 DEBUG ("fd = %i; calling `bind'", fd);
1873 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1877 sstrerror (errno, errbuf, sizeof (errbuf)));
1881 if (ai->ai_family == AF_INET)
1883 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1884 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1886 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1887 struct ip_mreqn mreq;
1889 struct ip_mreq mreq;
1892 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1894 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1895 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1896 /* Set the interface using the interface index if
1897 * possible (available). Unfortunately, the struct
1898 * ip_mreqn is not portable. */
1899 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1900 mreq.imr_ifindex = interface_idx;
1902 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1905 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1906 &loop, sizeof (loop)) == -1)
1909 ERROR ("network plugin: setsockopt (multicast-loop): %s",
1910 sstrerror (errno, errbuf,
1915 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1916 &mreq, sizeof (mreq)) == -1)
1919 ERROR ("network plugin: setsockopt (add-membership): %s",
1920 sstrerror (errno, errbuf,
1928 else if (ai->ai_family == AF_INET6)
1930 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1931 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1932 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1934 struct ipv6_mreq mreq;
1936 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1938 memcpy (&mreq.ipv6mr_multiaddr,
1940 sizeof (addr->sin6_addr));
1942 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1943 * ipv6mr_interface may be set to zeroes to
1944 * choose the default multicast interface or to
1945 * the index of a particular multicast-capable
1946 * interface if the host is multihomed.
1947 * Membership is associ-associated with a
1948 * single interface; programs running on
1949 * multihomed hosts may need to join the same
1950 * group on more than one interface.*/
1951 mreq.ipv6mr_interface = interface_idx;
1953 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1954 &loop, sizeof (loop)) == -1)
1957 ERROR ("network plugin: setsockopt (ipv6-multicast-loop): %s",
1958 sstrerror (errno, errbuf,
1963 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1964 &mreq, sizeof (mreq)) == -1)
1967 ERROR ("network plugin: setsockopt (ipv6-add-membership): %s",
1968 sstrerror (errno, errbuf,
1977 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1978 /* if a specific interface was set, bind the socket to it. But to avoid
1979 * possible problems with multicast routing, only do that for non-multicast
1981 if (interface_idx != 0)
1983 char interface_name[IFNAMSIZ];
1985 if (if_indextoname (interface_idx, interface_name) == NULL)
1988 DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
1990 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
1992 sizeof(interface_name)) == -1 )
1995 ERROR ("network plugin: setsockopt (bind-if): %s",
1996 sstrerror (errno, errbuf, sizeof (errbuf)));
2000 #endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
2003 } /* int network_bind_socket */
2005 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
2006 * or `SOCKENT_TYPE_SERVER' */
2007 static sockent_t *sockent_create (int type) /* {{{ */
2011 if ((type != SOCKENT_TYPE_CLIENT) && (type != SOCKENT_TYPE_SERVER))
2014 se = malloc (sizeof (*se));
2017 memset (se, 0, sizeof (*se));
2025 if (type == SOCKENT_TYPE_SERVER)
2027 se->data.server.fd = NULL;
2028 se->data.server.fd_num = 0;
2030 se->data.server.security_level = SECURITY_LEVEL_NONE;
2031 se->data.server.auth_file = NULL;
2032 se->data.server.userdb = NULL;
2033 se->data.server.cypher = NULL;
2038 se->data.client.fd = -1;
2039 se->data.client.addr = NULL;
2040 se->data.client.resolve_interval = 0;
2041 se->data.client.next_resolve_reconnect = 0;
2043 se->data.client.security_level = SECURITY_LEVEL_NONE;
2044 se->data.client.username = NULL;
2045 se->data.client.password = NULL;
2046 se->data.client.cypher = NULL;
2051 } /* }}} sockent_t *sockent_create */
2053 static int sockent_init_crypto (sockent_t *se) /* {{{ */
2055 #if HAVE_LIBGCRYPT /* {{{ */
2056 if (se->type == SOCKENT_TYPE_CLIENT)
2058 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
2060 network_init_gcrypt ();
2062 if ((se->data.client.username == NULL)
2063 || (se->data.client.password == NULL))
2065 ERROR ("network plugin: Client socket with "
2066 "security requested, but no "
2067 "credentials are configured.");
2070 gcry_md_hash_buffer (GCRY_MD_SHA256,
2071 se->data.client.password_hash,
2072 se->data.client.password,
2073 strlen (se->data.client.password));
2076 else /* (se->type == SOCKENT_TYPE_SERVER) */
2078 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2080 network_init_gcrypt ();
2082 if (se->data.server.auth_file == NULL)
2084 ERROR ("network plugin: Server socket with "
2085 "security requested, but no "
2086 "password file is configured.");
2090 if (se->data.server.auth_file != NULL)
2092 se->data.server.userdb = fbh_create (se->data.server.auth_file);
2093 if (se->data.server.userdb == NULL)
2095 ERROR ("network plugin: Reading password file "
2097 se->data.server.auth_file);
2098 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2103 #endif /* }}} HAVE_LIBGCRYPT */
2106 } /* }}} int sockent_init_crypto */
2108 static int sockent_client_disconnect (sockent_t *se) /* {{{ */
2110 struct sockent_client *client;
2112 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2115 client = &se->data.client;
2116 if (client->fd >= 0) /* connected */
2122 sfree (client->addr);
2123 client->addrlen = 0;
2126 } /* }}} int sockent_client_disconnect */
2128 static int sockent_client_connect (sockent_t *se) /* {{{ */
2130 static c_complain_t complaint = C_COMPLAIN_INIT_STATIC;
2132 struct sockent_client *client;
2133 struct addrinfo ai_hints;
2134 struct addrinfo *ai_list = NULL, *ai_ptr;
2136 _Bool reconnect = 0;
2139 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2142 client = &se->data.client;
2145 if (client->resolve_interval != 0 && client->next_resolve_reconnect < now) {
2146 DEBUG("network plugin: Reconnecting socket, resolve_interval = %lf, next_resolve_reconnect = %lf",
2147 CDTIME_T_TO_DOUBLE(client->resolve_interval), CDTIME_T_TO_DOUBLE(client->next_resolve_reconnect));
2151 if (client->fd >= 0 && !reconnect) /* already connected and not stale*/
2154 memset (&ai_hints, 0, sizeof (ai_hints));
2155 #ifdef AI_ADDRCONFIG
2156 ai_hints.ai_flags |= AI_ADDRCONFIG;
2158 ai_hints.ai_family = AF_UNSPEC;
2159 ai_hints.ai_socktype = SOCK_DGRAM;
2160 ai_hints.ai_protocol = IPPROTO_UDP;
2162 status = getaddrinfo (se->node,
2163 (se->service != NULL) ? se->service : NET_DEFAULT_PORT,
2164 &ai_hints, &ai_list);
2167 c_complain (LOG_ERR, &complaint,
2168 "network plugin: getaddrinfo (%s, %s) failed: %s",
2169 (se->node == NULL) ? "(null)" : se->node,
2170 (se->service == NULL) ? "(null)" : se->service,
2171 gai_strerror (status));
2176 c_release (LOG_NOTICE, &complaint,
2177 "network plugin: Successfully resolved \"%s\".",
2181 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2183 if (client->fd >= 0) /* when we reconnect */
2184 sockent_client_disconnect(se);
2186 client->fd = socket (ai_ptr->ai_family,
2187 ai_ptr->ai_socktype,
2188 ai_ptr->ai_protocol);
2192 ERROR ("network plugin: socket(2) failed: %s",
2193 sstrerror (errno, errbuf,
2198 client->addr = malloc (sizeof (*client->addr));
2199 if (client->addr == NULL)
2201 ERROR ("network plugin: malloc failed.");
2207 memset (client->addr, 0, sizeof (*client->addr));
2208 assert (sizeof (*client->addr) >= ai_ptr->ai_addrlen);
2209 memcpy (client->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2210 client->addrlen = ai_ptr->ai_addrlen;
2212 network_set_ttl (se, ai_ptr);
2213 network_set_interface (se, ai_ptr);
2215 /* We don't open more than one write-socket per
2216 * node/service pair.. */
2220 freeaddrinfo (ai_list);
2224 if (client->resolve_interval > 0)
2225 client->next_resolve_reconnect = now + client->resolve_interval;
2227 } /* }}} int sockent_client_connect */
2229 /* Open the file descriptors for a initialized sockent structure. */
2230 static int sockent_server_listen (sockent_t *se) /* {{{ */
2232 struct addrinfo ai_hints;
2233 struct addrinfo *ai_list, *ai_ptr;
2237 const char *service;
2242 assert (se->data.server.fd == NULL);
2243 assert (se->data.server.fd_num == 0);
2246 service = se->service;
2248 if (service == NULL)
2249 service = NET_DEFAULT_PORT;
2251 DEBUG ("network plugin: sockent_server_listen: node = %s; service = %s;",
2254 memset (&ai_hints, 0, sizeof (ai_hints));
2255 ai_hints.ai_flags = 0;
2257 ai_hints.ai_flags |= AI_PASSIVE;
2259 #ifdef AI_ADDRCONFIG
2260 ai_hints.ai_flags |= AI_ADDRCONFIG;
2262 ai_hints.ai_family = AF_UNSPEC;
2263 ai_hints.ai_socktype = SOCK_DGRAM;
2264 ai_hints.ai_protocol = IPPROTO_UDP;
2266 status = getaddrinfo (node, service, &ai_hints, &ai_list);
2269 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
2270 (se->node == NULL) ? "(null)" : se->node,
2271 (se->service == NULL) ? "(null)" : se->service,
2272 gai_strerror (status));
2276 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2280 tmp = realloc (se->data.server.fd,
2281 sizeof (*tmp) * (se->data.server.fd_num + 1));
2284 ERROR ("network plugin: realloc failed.");
2287 se->data.server.fd = tmp;
2288 tmp = se->data.server.fd + se->data.server.fd_num;
2290 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
2291 ai_ptr->ai_protocol);
2295 ERROR ("network plugin: socket(2) failed: %s",
2296 sstrerror (errno, errbuf,
2301 status = network_bind_socket (*tmp, ai_ptr, se->interface);
2309 se->data.server.fd_num++;
2311 } /* for (ai_list) */
2313 freeaddrinfo (ai_list);
2315 if (se->data.server.fd_num <= 0)
2318 } /* }}} int sockent_server_listen */
2320 /* Add a sockent to the global list of sockets */
2321 static int sockent_add (sockent_t *se) /* {{{ */
2323 sockent_t *last_ptr;
2328 if (se->type == SOCKENT_TYPE_SERVER)
2333 tmp = realloc (listen_sockets_pollfd,
2334 sizeof (*tmp) * (listen_sockets_num
2335 + se->data.server.fd_num));
2338 ERROR ("network plugin: realloc failed.");
2341 listen_sockets_pollfd = tmp;
2342 tmp = listen_sockets_pollfd + listen_sockets_num;
2344 for (i = 0; i < se->data.server.fd_num; i++)
2346 memset (tmp + i, 0, sizeof (*tmp));
2347 tmp[i].fd = se->data.server.fd[i];
2348 tmp[i].events = POLLIN | POLLPRI;
2352 listen_sockets_num += se->data.server.fd_num;
2354 if (listen_sockets == NULL)
2356 listen_sockets = se;
2359 last_ptr = listen_sockets;
2361 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2363 if (sending_sockets == NULL)
2365 sending_sockets = se;
2368 last_ptr = sending_sockets;
2371 while (last_ptr->next != NULL)
2372 last_ptr = last_ptr->next;
2373 last_ptr->next = se;
2376 } /* }}} int sockent_add */
2378 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
2382 receive_list_entry_t *ent;
2385 /* Lock and wait for more data to come in */
2386 pthread_mutex_lock (&receive_list_lock);
2387 while ((listen_loop == 0)
2388 && (receive_list_head == NULL))
2389 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
2391 /* Remove the head entry and unlock */
2392 ent = receive_list_head;
2394 receive_list_head = ent->next;
2395 receive_list_length--;
2396 pthread_mutex_unlock (&receive_list_lock);
2398 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2399 * because we dispatch all missing packets before shutting down. */
2403 /* Look for the correct `sockent_t' */
2404 se = listen_sockets;
2409 for (i = 0; i < se->data.server.fd_num; i++)
2410 if (se->data.server.fd[i] == ent->fd)
2413 if (i < se->data.server.fd_num)
2421 ERROR ("network plugin: Got packet from FD %i, but can't "
2422 "find an appropriate socket entry.",
2429 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0,
2430 /* username = */ NULL);
2436 } /* }}} void *dispatch_thread */
2438 static int network_receive (void) /* {{{ */
2440 char buffer[network_config_packet_size];
2446 receive_list_entry_t *private_list_head;
2447 receive_list_entry_t *private_list_tail;
2448 uint64_t private_list_length;
2450 assert (listen_sockets_num > 0);
2452 private_list_head = NULL;
2453 private_list_tail = NULL;
2454 private_list_length = 0;
2456 while (listen_loop == 0)
2458 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2464 ERROR ("network plugin: poll(2) failed: %s",
2465 sstrerror (errno, errbuf, sizeof (errbuf)));
2469 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2471 receive_list_entry_t *ent;
2473 if ((listen_sockets_pollfd[i].revents
2474 & (POLLIN | POLLPRI)) == 0)
2478 buffer_len = recv (listen_sockets_pollfd[i].fd,
2479 buffer, sizeof (buffer),
2484 status = (errno != 0) ? errno : -1;
2485 ERROR ("network plugin: recv(2) failed: %s",
2486 sstrerror (errno, errbuf, sizeof (errbuf)));
2490 stats_octets_rx += ((uint64_t) buffer_len);
2493 /* TODO: Possible performance enhancement: Do not free
2494 * these entries in the dispatch thread but put them in
2495 * another list, so we don't have to allocate more and
2496 * more of these structures. */
2497 ent = malloc (sizeof (receive_list_entry_t));
2500 ERROR ("network plugin: malloc failed.");
2504 memset (ent, 0, sizeof (receive_list_entry_t));
2505 ent->data = malloc (network_config_packet_size);
2506 if (ent->data == NULL)
2509 ERROR ("network plugin: malloc failed.");
2513 ent->fd = listen_sockets_pollfd[i].fd;
2516 memcpy (ent->data, buffer, buffer_len);
2517 ent->data_len = buffer_len;
2519 if (private_list_head == NULL)
2520 private_list_head = ent;
2522 private_list_tail->next = ent;
2523 private_list_tail = ent;
2524 private_list_length++;
2526 /* Do not block here. Blocking here has led to
2527 * insufficient performance in the past. */
2528 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2530 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2531 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2533 if (receive_list_head == NULL)
2534 receive_list_head = private_list_head;
2536 receive_list_tail->next = private_list_head;
2537 receive_list_tail = private_list_tail;
2538 receive_list_length += private_list_length;
2540 pthread_cond_signal (&receive_list_cond);
2541 pthread_mutex_unlock (&receive_list_lock);
2543 private_list_head = NULL;
2544 private_list_tail = NULL;
2545 private_list_length = 0;
2549 } /* for (listen_sockets_pollfd) */
2553 } /* while (listen_loop == 0) */
2555 /* Make sure everything is dispatched before exiting. */
2556 if (private_list_head != NULL)
2558 pthread_mutex_lock (&receive_list_lock);
2560 if (receive_list_head == NULL)
2561 receive_list_head = private_list_head;
2563 receive_list_tail->next = private_list_head;
2564 receive_list_tail = private_list_tail;
2565 receive_list_length += private_list_length;
2567 pthread_cond_signal (&receive_list_cond);
2568 pthread_mutex_unlock (&receive_list_lock);
2572 } /* }}} int network_receive */
2574 static void *receive_thread (void __attribute__((unused)) *arg)
2576 return (network_receive () ? (void *) 1 : (void *) 0);
2577 } /* void *receive_thread */
2579 static void network_init_buffer (void)
2581 memset (send_buffer, 0, network_config_packet_size);
2582 send_buffer_ptr = send_buffer;
2583 send_buffer_fill = 0;
2584 send_buffer_last_update = 0;
2586 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2587 } /* int network_init_buffer */
2589 static void networt_send_buffer_plain (sockent_t *se, /* {{{ */
2590 const char *buffer, size_t buffer_size)
2596 status = sockent_client_connect (se);
2600 status = sendto (se->data.client.fd, buffer, buffer_size,
2602 (struct sockaddr *) se->data.client.addr,
2603 se->data.client.addrlen);
2608 if ((errno == EINTR) || (errno == EAGAIN))
2611 ERROR ("network plugin: sendto failed: %s. Closing sending socket.",
2612 sstrerror (errno, errbuf, sizeof (errbuf)));
2613 sockent_client_disconnect (se);
2619 } /* }}} void networt_send_buffer_plain */
2622 #define BUFFER_ADD(p,s) do { \
2623 memcpy (buffer + buffer_offset, (p), (s)); \
2624 buffer_offset += (s); \
2627 static void networt_send_buffer_signed (sockent_t *se, /* {{{ */
2628 const char *in_buffer, size_t in_buffer_size)
2630 part_signature_sha256_t ps;
2631 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2632 size_t buffer_offset;
2633 size_t username_len;
2637 unsigned char *hash;
2640 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2643 ERROR ("network plugin: Creating HMAC object failed: %s",
2644 gcry_strerror (err));
2648 err = gcry_md_setkey (hd, se->data.client.password,
2649 strlen (se->data.client.password));
2652 ERROR ("network plugin: gcry_md_setkey failed: %s",
2653 gcry_strerror (err));
2658 username_len = strlen (se->data.client.username);
2659 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2661 ERROR ("network plugin: Username too long: %s",
2662 se->data.client.username);
2666 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2667 se->data.client.username, username_len);
2668 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2669 in_buffer, in_buffer_size);
2671 /* Initialize the `ps' structure. */
2672 memset (&ps, 0, sizeof (ps));
2673 ps.head.type = htons (TYPE_SIGN_SHA256);
2674 ps.head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len);
2676 /* Calculate the hash value. */
2677 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2678 username_len + in_buffer_size);
2679 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2682 ERROR ("network plugin: gcry_md_read failed.");
2686 memcpy (ps.hash, hash, sizeof (ps.hash));
2688 /* Add the header */
2691 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2692 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2693 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2695 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2700 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2701 networt_send_buffer_plain (se, buffer, buffer_offset);
2702 } /* }}} void networt_send_buffer_signed */
2704 static void networt_send_buffer_encrypted (sockent_t *se, /* {{{ */
2705 const char *in_buffer, size_t in_buffer_size)
2707 part_encryption_aes256_t pea;
2708 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2710 size_t buffer_offset;
2712 size_t username_len;
2714 gcry_cipher_hd_t cypher;
2716 /* Initialize the header fields */
2717 memset (&pea, 0, sizeof (pea));
2718 pea.head.type = htons (TYPE_ENCR_AES256);
2720 pea.username = se->data.client.username;
2722 username_len = strlen (pea.username);
2723 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2725 ERROR ("network plugin: Username too long: %s", pea.username);
2729 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2730 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2731 - sizeof (pea.hash);
2733 assert (buffer_size <= sizeof (buffer));
2734 DEBUG ("network plugin: networt_send_buffer_encrypted: "
2735 "buffer_size = %zu;", buffer_size);
2737 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2738 + username_len + in_buffer_size));
2739 pea.username_length = htons ((uint16_t) username_len);
2741 /* Chose a random initialization vector. */
2742 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2744 /* Create hash of the payload */
2745 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2747 /* Initialize the buffer */
2749 memset (buffer, 0, sizeof (buffer));
2752 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2753 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2754 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2755 BUFFER_ADD (pea.username, username_len);
2756 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2757 assert (buffer_offset == header_size);
2758 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2759 BUFFER_ADD (in_buffer, in_buffer_size);
2761 assert (buffer_offset == buffer_size);
2763 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2764 se->data.client.password);
2768 /* Encrypt the buffer in-place */
2769 err = gcry_cipher_encrypt (cypher,
2770 buffer + header_size,
2771 buffer_size - header_size,
2772 /* in = */ NULL, /* in len = */ 0);
2775 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2776 gcry_strerror (err));
2780 /* Send it out without further modifications */
2781 networt_send_buffer_plain (se, buffer, buffer_size);
2782 } /* }}} void networt_send_buffer_encrypted */
2784 #endif /* HAVE_LIBGCRYPT */
2786 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2790 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2792 for (se = sending_sockets; se != NULL; se = se->next)
2795 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2796 networt_send_buffer_encrypted (se, buffer, buffer_len);
2797 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2798 networt_send_buffer_signed (se, buffer, buffer_len);
2799 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2800 #endif /* HAVE_LIBGCRYPT */
2801 networt_send_buffer_plain (se, buffer, buffer_len);
2802 } /* for (sending_sockets) */
2803 } /* }}} void network_send_buffer */
2805 static int add_to_buffer (char *buffer, int buffer_size, /* {{{ */
2806 value_list_t *vl_def,
2807 const data_set_t *ds, const value_list_t *vl)
2809 char *buffer_orig = buffer;
2811 if (strcmp (vl_def->host, vl->host) != 0)
2813 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2814 vl->host, strlen (vl->host)) != 0)
2816 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2819 if (vl_def->time != vl->time)
2821 if (write_part_number (&buffer, &buffer_size, TYPE_TIME_HR,
2822 (uint64_t) vl->time))
2824 vl_def->time = vl->time;
2827 if (vl_def->interval != vl->interval)
2829 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL_HR,
2830 (uint64_t) vl->interval))
2832 vl_def->interval = vl->interval;
2835 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2837 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2838 vl->plugin, strlen (vl->plugin)) != 0)
2840 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2843 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2845 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2846 vl->plugin_instance,
2847 strlen (vl->plugin_instance)) != 0)
2849 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2852 if (strcmp (vl_def->type, vl->type) != 0)
2854 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2855 vl->type, strlen (vl->type)) != 0)
2857 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2860 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2862 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2864 strlen (vl->type_instance)) != 0)
2866 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2869 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2872 return (buffer - buffer_orig);
2873 } /* }}} int add_to_buffer */
2875 static void flush_buffer (void)
2877 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2880 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2882 stats_octets_tx += ((uint64_t) send_buffer_fill);
2885 network_init_buffer ();
2888 static int network_write (const data_set_t *ds, const value_list_t *vl,
2889 user_data_t __attribute__((unused)) *user_data)
2893 if (!check_send_okay (vl))
2896 char name[6*DATA_MAX_NAME_LEN];
2897 FORMAT_VL (name, sizeof (name), vl);
2898 name[sizeof (name) - 1] = 0;
2899 DEBUG ("network plugin: network_write: "
2900 "NOT sending %s.", name);
2902 /* Counter is not protected by another lock and may be reached by
2903 * multiple threads */
2904 pthread_mutex_lock (&stats_lock);
2905 stats_values_not_sent++;
2906 pthread_mutex_unlock (&stats_lock);
2910 uc_meta_data_add_unsigned_int (vl,
2911 "network:time_sent", (uint64_t) vl->time);
2913 pthread_mutex_lock (&send_buffer_lock);
2915 status = add_to_buffer (send_buffer_ptr,
2916 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2921 /* status == bytes added to the buffer */
2922 send_buffer_fill += status;
2923 send_buffer_ptr += status;
2924 send_buffer_last_update = cdtime();
2926 stats_values_sent++;
2932 status = add_to_buffer (send_buffer_ptr,
2933 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2939 send_buffer_fill += status;
2940 send_buffer_ptr += status;
2942 stats_values_sent++;
2948 ERROR ("network plugin: Unable to append to the "
2949 "buffer for some weird reason");
2951 else if ((network_config_packet_size - send_buffer_fill) < 15)
2956 pthread_mutex_unlock (&send_buffer_lock);
2958 return ((status < 0) ? -1 : 0);
2959 } /* int network_write */
2961 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2965 if (cf_util_get_int (ci, &tmp) != 0)
2967 else if ((tmp > 0) && (tmp <= 255))
2968 network_config_ttl = tmp;
2970 WARNING ("network plugin: The `TimeToLive' must be between 1 and 255.");
2975 } /* }}} int network_config_set_ttl */
2977 static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
2982 if (cf_util_get_string_buffer (ci, if_name, sizeof (if_name)) != 0)
2985 *interface = if_nametoindex (if_name);
2987 } /* }}} int network_config_set_interface */
2989 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
2993 if (cf_util_get_int (ci, &tmp) != 0)
2995 else if ((tmp >= 1024) && (tmp <= 65535))
2996 network_config_packet_size = tmp;
2998 WARNING ("network plugin: The `MaxPacketSize' must be between 1024 and 65535.");
3003 } /* }}} int network_config_set_buffer_size */
3006 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
3010 if ((ci->values_num != 1)
3011 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3013 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
3014 "one string argument.");
3018 str = ci->values[0].value.string;
3019 if (strcasecmp ("Encrypt", str) == 0)
3020 *retval = SECURITY_LEVEL_ENCRYPT;
3021 else if (strcasecmp ("Sign", str) == 0)
3022 *retval = SECURITY_LEVEL_SIGN;
3023 else if (strcasecmp ("None", str) == 0)
3024 *retval = SECURITY_LEVEL_NONE;
3027 WARNING ("network plugin: Unknown security level: %s.", str);
3032 } /* }}} int network_config_set_security_level */
3033 #endif /* HAVE_LIBGCRYPT */
3035 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
3041 if ((ci->values_num < 1) || (ci->values_num > 2)
3042 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3043 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3045 ERROR ("network plugin: The `%s' config option needs "
3046 "one or two string arguments.", ci->key);
3050 se = sockent_create (SOCKENT_TYPE_SERVER);
3053 ERROR ("network plugin: sockent_create failed.");
3057 se->node = strdup (ci->values[0].value.string);
3058 if (ci->values_num >= 2)
3059 se->service = strdup (ci->values[1].value.string);
3061 for (i = 0; i < ci->children_num; i++)
3063 oconfig_item_t *child = ci->children + i;
3066 if (strcasecmp ("AuthFile", child->key) == 0)
3067 cf_util_get_string (child, &se->data.server.auth_file);
3068 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3069 network_config_set_security_level (child,
3070 &se->data.server.security_level);
3072 #endif /* HAVE_LIBGCRYPT */
3073 if (strcasecmp ("Interface", child->key) == 0)
3074 network_config_set_interface (child, &se->interface);
3077 WARNING ("network plugin: Option `%s' is not allowed here.",
3083 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
3084 && (se->data.server.auth_file == NULL))
3086 ERROR ("network plugin: A security level higher than `none' was "
3087 "requested, but no AuthFile option was given. Cowardly refusing to "
3088 "open this socket!");
3089 sockent_destroy (se);
3092 #endif /* HAVE_LIBGCRYPT */
3094 status = sockent_init_crypto (se);
3097 ERROR ("network plugin: network_config_add_listen: sockent_init_crypto() failed.");
3098 sockent_destroy (se);
3102 status = sockent_server_listen (se);
3105 ERROR ("network plugin: network_config_add_listen: sockent_server_listen failed.");
3106 sockent_destroy (se);
3110 status = sockent_add (se);
3113 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
3114 sockent_destroy (se);
3119 } /* }}} int network_config_add_listen */
3121 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
3127 if ((ci->values_num < 1) || (ci->values_num > 2)
3128 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3129 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3131 ERROR ("network plugin: The `%s' config option needs "
3132 "one or two string arguments.", ci->key);
3136 se = sockent_create (SOCKENT_TYPE_CLIENT);
3139 ERROR ("network plugin: sockent_create failed.");
3143 se->node = strdup (ci->values[0].value.string);
3144 if (ci->values_num >= 2)
3145 se->service = strdup (ci->values[1].value.string);
3147 for (i = 0; i < ci->children_num; i++)
3149 oconfig_item_t *child = ci->children + i;
3152 if (strcasecmp ("Username", child->key) == 0)
3153 cf_util_get_string (child, &se->data.client.username);
3154 else if (strcasecmp ("Password", child->key) == 0)
3155 cf_util_get_string (child, &se->data.client.password);
3156 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3157 network_config_set_security_level (child,
3158 &se->data.client.security_level);
3160 #endif /* HAVE_LIBGCRYPT */
3161 if (strcasecmp ("Interface", child->key) == 0)
3162 network_config_set_interface (child, &se->interface);
3163 else if (strcasecmp ("ResolveInterval", child->key) == 0)
3164 cf_util_get_cdtime(child, &se->data.client.resolve_interval);
3167 WARNING ("network plugin: Option `%s' is not allowed here.",
3173 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
3174 && ((se->data.client.username == NULL)
3175 || (se->data.client.password == NULL)))
3177 ERROR ("network plugin: A security level higher than `none' was "
3178 "requested, but no Username or Password option was given. "
3179 "Cowardly refusing to open this socket!");
3180 sockent_destroy (se);
3183 #endif /* HAVE_LIBGCRYPT */
3185 status = sockent_init_crypto (se);
3188 ERROR ("network plugin: network_config_add_server: sockent_init_crypto() failed.");
3189 sockent_destroy (se);
3193 /* No call to sockent_client_connect() here -- it is called from
3194 * networt_send_buffer_plain(). */
3196 status = sockent_add (se);
3199 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
3200 sockent_destroy (se);
3205 } /* }}} int network_config_add_server */
3207 static int network_config (oconfig_item_t *ci) /* {{{ */
3211 /* The options need to be applied first */
3212 for (i = 0; i < ci->children_num; i++)
3214 oconfig_item_t *child = ci->children + i;
3215 if (strcasecmp ("TimeToLive", child->key) == 0)
3216 network_config_set_ttl (child);
3219 for (i = 0; i < ci->children_num; i++)
3221 oconfig_item_t *child = ci->children + i;
3223 if (strcasecmp ("Listen", child->key) == 0)
3224 network_config_add_listen (child);
3225 else if (strcasecmp ("Server", child->key) == 0)
3226 network_config_add_server (child);
3227 else if (strcasecmp ("TimeToLive", child->key) == 0) {
3228 /* Handled earlier */
3230 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
3231 network_config_set_buffer_size (child);
3232 else if (strcasecmp ("Forward", child->key) == 0)
3233 cf_util_get_boolean (child, &network_config_forward);
3234 else if (strcasecmp ("ReportStats", child->key) == 0)
3235 cf_util_get_boolean (child, &network_config_stats);
3238 WARNING ("network plugin: Option `%s' is not allowed here.",
3244 } /* }}} int network_config */
3246 static int network_notification (const notification_t *n,
3247 user_data_t __attribute__((unused)) *user_data)
3249 char buffer[network_config_packet_size];
3250 char *buffer_ptr = buffer;
3251 int buffer_free = sizeof (buffer);
3254 if (!check_send_notify_okay (n))
3257 memset (buffer, 0, sizeof (buffer));
3259 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME_HR,
3260 (uint64_t) n->time);
3264 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
3265 (uint64_t) n->severity);
3269 if (strlen (n->host) > 0)
3271 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
3272 n->host, strlen (n->host));
3277 if (strlen (n->plugin) > 0)
3279 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
3280 n->plugin, strlen (n->plugin));
3285 if (strlen (n->plugin_instance) > 0)
3287 status = write_part_string (&buffer_ptr, &buffer_free,
3288 TYPE_PLUGIN_INSTANCE,
3289 n->plugin_instance, strlen (n->plugin_instance));
3294 if (strlen (n->type) > 0)
3296 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3297 n->type, strlen (n->type));
3302 if (strlen (n->type_instance) > 0)
3304 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3305 n->type_instance, strlen (n->type_instance));
3310 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3311 n->message, strlen (n->message));
3315 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3318 } /* int network_notification */
3320 static int network_shutdown (void)
3326 /* Kill the listening thread */
3327 if (receive_thread_running != 0)
3329 INFO ("network plugin: Stopping receive thread.");
3330 pthread_kill (receive_thread_id, SIGTERM);
3331 pthread_join (receive_thread_id, NULL /* no return value */);
3332 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3333 receive_thread_running = 0;
3336 /* Shutdown the dispatching thread */
3337 if (dispatch_thread_running != 0)
3339 INFO ("network plugin: Stopping dispatch thread.");
3340 pthread_mutex_lock (&receive_list_lock);
3341 pthread_cond_broadcast (&receive_list_cond);
3342 pthread_mutex_unlock (&receive_list_lock);
3343 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3344 dispatch_thread_running = 0;
3347 sockent_destroy (listen_sockets);
3349 if (send_buffer_fill > 0)
3352 sfree (send_buffer);
3354 for (se = sending_sockets; se != NULL; se = se->next)
3355 sockent_client_disconnect (se);
3356 sockent_destroy (sending_sockets);
3358 plugin_unregister_config ("network");
3359 plugin_unregister_init ("network");
3360 plugin_unregister_write ("network");
3361 plugin_unregister_shutdown ("network");
3364 } /* int network_shutdown */
3366 static int network_stats_read (void) /* {{{ */
3368 derive_t copy_octets_rx;
3369 derive_t copy_octets_tx;
3370 derive_t copy_packets_rx;
3371 derive_t copy_packets_tx;
3372 derive_t copy_values_dispatched;
3373 derive_t copy_values_not_dispatched;
3374 derive_t copy_values_sent;
3375 derive_t copy_values_not_sent;
3376 derive_t copy_receive_list_length;
3377 value_list_t vl = VALUE_LIST_INIT;
3380 copy_octets_rx = stats_octets_rx;
3381 copy_octets_tx = stats_octets_tx;
3382 copy_packets_rx = stats_packets_rx;
3383 copy_packets_tx = stats_packets_tx;
3384 copy_values_dispatched = stats_values_dispatched;
3385 copy_values_not_dispatched = stats_values_not_dispatched;
3386 copy_values_sent = stats_values_sent;
3387 copy_values_not_sent = stats_values_not_sent;
3388 copy_receive_list_length = receive_list_length;
3390 /* Initialize `vl' */
3394 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3395 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3397 /* Octets received / sent */
3398 vl.values[0].derive = (derive_t) copy_octets_rx;
3399 vl.values[1].derive = (derive_t) copy_octets_tx;
3400 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3401 plugin_dispatch_values (&vl);
3403 /* Packets received / send */
3404 vl.values[0].derive = (derive_t) copy_packets_rx;
3405 vl.values[1].derive = (derive_t) copy_packets_tx;
3406 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3407 plugin_dispatch_values (&vl);
3409 /* Values (not) dispatched and (not) send */
3410 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3413 vl.values[0].derive = (derive_t) copy_values_dispatched;
3414 sstrncpy (vl.type_instance, "dispatch-accepted",
3415 sizeof (vl.type_instance));
3416 plugin_dispatch_values (&vl);
3418 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3419 sstrncpy (vl.type_instance, "dispatch-rejected",
3420 sizeof (vl.type_instance));
3421 plugin_dispatch_values (&vl);
3423 vl.values[0].derive = (derive_t) copy_values_sent;
3424 sstrncpy (vl.type_instance, "send-accepted",
3425 sizeof (vl.type_instance));
3426 plugin_dispatch_values (&vl);
3428 vl.values[0].derive = (derive_t) copy_values_not_sent;
3429 sstrncpy (vl.type_instance, "send-rejected",
3430 sizeof (vl.type_instance));
3431 plugin_dispatch_values (&vl);
3433 /* Receive queue length */
3434 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3435 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3436 vl.type_instance[0] = 0;
3437 plugin_dispatch_values (&vl);
3440 } /* }}} int network_stats_read */
3442 static int network_init (void)
3444 static _Bool have_init = 0;
3446 /* Check if we were already initialized. If so, just return - there's
3447 * nothing more to do (for now, that is). */
3453 network_init_gcrypt ();
3456 if (network_config_stats)
3457 plugin_register_read ("network", network_stats_read);
3459 plugin_register_shutdown ("network", network_shutdown);
3461 send_buffer = malloc (network_config_packet_size);
3462 if (send_buffer == NULL)
3464 ERROR ("network plugin: malloc failed.");
3467 network_init_buffer ();
3469 /* setup socket(s) and so on */
3470 if (sending_sockets != NULL)
3472 plugin_register_write ("network", network_write,
3473 /* user_data = */ NULL);
3474 plugin_register_notification ("network", network_notification,
3475 /* user_data = */ NULL);
3478 /* If no threads need to be started, return here. */
3479 if ((listen_sockets_num == 0)
3480 || ((dispatch_thread_running != 0)
3481 && (receive_thread_running != 0)))
3484 if (dispatch_thread_running == 0)
3487 status = plugin_thread_create (&dispatch_thread_id,
3488 NULL /* no attributes */,
3490 NULL /* no argument */);
3494 ERROR ("network: pthread_create failed: %s",
3495 sstrerror (errno, errbuf,
3500 dispatch_thread_running = 1;
3504 if (receive_thread_running == 0)
3507 status = plugin_thread_create (&receive_thread_id,
3508 NULL /* no attributes */,
3510 NULL /* no argument */);
3514 ERROR ("network: pthread_create failed: %s",
3515 sstrerror (errno, errbuf,
3520 receive_thread_running = 1;
3525 } /* int network_init */
3528 * The flush option of the network plugin cannot flush individual identifiers.
3529 * All the values are added to a buffer and sent when the buffer is full, the
3530 * requested value may or may not be in there, it's not worth finding out. We
3531 * just send the buffer if `flush' is called - if the requested value was in
3532 * there, good. If not, well, then there is nothing to flush.. -octo
3534 static int network_flush (cdtime_t timeout,
3535 __attribute__((unused)) const char *identifier,
3536 __attribute__((unused)) user_data_t *user_data)
3538 pthread_mutex_lock (&send_buffer_lock);
3540 if (send_buffer_fill > 0)
3544 cdtime_t now = cdtime ();
3545 if ((send_buffer_last_update + timeout) > now)
3547 pthread_mutex_unlock (&send_buffer_lock);
3553 pthread_mutex_unlock (&send_buffer_lock);
3556 } /* int network_flush */
3558 void module_register (void)
3560 plugin_register_complex_config ("network", network_config);
3561 plugin_register_init ("network", network_init);
3562 plugin_register_flush ("network", network_flush,
3563 /* user_data = */ NULL);
3564 } /* void module_register */
3566 /* vim: set fdm=marker : */