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 */
32 #include "utils_fbhash.h"
33 #include "utils_cache.h"
34 #include "utils_complain.h"
42 # include <netinet/in.h>
45 # include <arpa/inet.h>
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
60 # pragma GCC diagnostic ignored "-Wdeprecated-declarations"
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
66 # define GCRYPT_NO_DEPRECATED
68 # if defined __APPLE__
69 /* Re enable deprecation warnings */
70 # pragma GCC diagnostic warning "-Wdeprecated-declarations"
72 # if GCRYPT_VERSION_NUMBER < 0x010600
73 GCRY_THREAD_OPTION_PTHREAD_IMPL;
77 #ifndef IPV6_ADD_MEMBERSHIP
78 # ifdef IPV6_JOIN_GROUP
79 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
81 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
83 #endif /* !IP_ADD_MEMBERSHIP */
86 * Maximum size required for encryption / signing:
88 * 42 bytes for the encryption header
89 * + 64 bytes for the username
93 #define BUFF_SIG_SIZE 106
98 #define SECURITY_LEVEL_NONE 0
100 # define SECURITY_LEVEL_SIGN 1
101 # define SECURITY_LEVEL_ENCRYPT 2
103 struct sockent_client
106 struct sockaddr_storage *addr;
112 gcry_cipher_hd_t cypher;
113 unsigned char password_hash[32];
115 cdtime_t next_resolve_reconnect;
116 cdtime_t resolve_interval;
119 struct sockent_server
127 gcry_cipher_hd_t cypher;
131 typedef struct sockent
133 #define SOCKENT_TYPE_CLIENT 1
134 #define SOCKENT_TYPE_SERVER 2
143 struct sockent_client client;
144 struct sockent_server server;
147 struct sockent *next;
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 * +-------+-----------------------+-------------------------------+
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 * +-------------------------------+-------------------------------+
167 * +-------------------------------+-------------------------------+
168 * : (Length - 4) Bytes :
169 * +---------------------------------------------------------------+
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 * +-------------------------------+-------------------------------+
182 * +-------------------------------+-------------------------------+
183 * : (Length - 4 == 2 || 4 || 8) Bytes :
184 * +---------------------------------------------------------------+
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 * +-------------------------------+-------------------------------+
197 * +-------------------------------+---------------+---------------+
198 * ! Num of values ! Type0 ! Type1 !
199 * +-------------------------------+---------------+---------------+
202 * +---------------------------------------------------------------+
205 * +---------------------------------------------------------------+
210 uint16_t *num_values;
211 uint8_t *values_types;
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 * +-------------------------------+-------------------------------+
220 * +-------------------------------+-------------------------------+
221 * ! Hash (Bits 0 - 31) !
223 * ! Hash (Bits 224 - 255) !
224 * +---------------------------------------------------------------+
227 #define PART_SIGNATURE_SHA256_SIZE 36
228 struct part_signature_sha256_s
231 unsigned char hash[32];
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 * +-------------------------------+-------------------------------+
240 * +-------------------------------+-------------------------------+
241 * ! Original length ! Padding (0 - 15 bytes) !
242 * +-------------------------------+-------------------------------+
243 * ! Hash (Bits 0 - 31) !
245 * ! Hash (Bits 128 - 159) !
246 * +---------------------------------------------------------------+
249 #define PART_ENCRYPTION_AES256_SIZE 42
250 struct part_encryption_aes256_s
253 uint16_t username_length;
255 unsigned char iv[16];
257 unsigned char hash[20];
261 typedef struct part_encryption_aes256_s part_encryption_aes256_t;
263 struct receive_list_entry_s
268 struct receive_list_entry_s *next;
270 typedef struct receive_list_entry_s receive_list_entry_t;
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
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;
328 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
330 uint64_t time_sent = 0;
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)))
342 } /* }}} _Bool check_receive_okay */
344 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
349 if (network_config_forward)
352 if (vl->meta == NULL)
355 status = meta_data_get_boolean (vl->meta, "network:received", &received);
356 if (status == -ENOENT)
358 else if (status != 0)
360 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
361 "with status %i.", status);
365 /* By default, only *send* value lists that were not *received* by the
368 } /* }}} _Bool check_send_okay */
370 static _Bool check_notify_received (const notification_t *n) /* {{{ */
372 for (notification_meta_t *ptr = n->meta; ptr != NULL; ptr = ptr->next)
373 if ((strcmp ("network:received", ptr->name) == 0)
374 && (ptr->type == NM_TYPE_BOOLEAN))
375 return ((_Bool) ptr->nm_value.nm_boolean);
378 } /* }}} _Bool check_notify_received */
380 static _Bool check_send_notify_okay (const notification_t *n) /* {{{ */
382 static c_complain_t complain_forwarding = C_COMPLAIN_INIT_STATIC;
388 received = check_notify_received (n);
390 if (network_config_forward && received)
392 c_complain_once (LOG_ERR, &complain_forwarding,
393 "network plugin: A notification has been received via the network "
394 "and forwarding is enabled. Forwarding of notifications is currently "
395 "not supported, because there is not loop-deteciton available. "
396 "Please contact the collectd mailing list if you need this "
400 /* By default, only *send* value lists that were not *received* by the
403 } /* }}} _Bool check_send_notify_okay */
405 static int network_dispatch_values (value_list_t *vl, /* {{{ */
406 const char *username)
411 || (strlen (vl->host) == 0)
412 || (strlen (vl->plugin) == 0)
413 || (strlen (vl->type) == 0))
416 if (!check_receive_okay (vl))
419 char name[6*DATA_MAX_NAME_LEN];
420 FORMAT_VL (name, sizeof (name), vl);
421 name[sizeof (name) - 1] = 0;
422 DEBUG ("network plugin: network_dispatch_values: "
423 "NOT dispatching %s.", name);
425 stats_values_not_dispatched++;
429 assert (vl->meta == NULL);
431 vl->meta = meta_data_create ();
432 if (vl->meta == NULL)
434 ERROR ("network plugin: meta_data_create failed.");
438 status = meta_data_add_boolean (vl->meta, "network:received", 1);
441 ERROR ("network plugin: meta_data_add_boolean failed.");
442 meta_data_destroy (vl->meta);
447 if (username != NULL)
449 status = meta_data_add_string (vl->meta, "network:username", username);
452 ERROR ("network plugin: meta_data_add_string failed.");
453 meta_data_destroy (vl->meta);
459 plugin_dispatch_values (vl);
460 stats_values_dispatched++;
462 meta_data_destroy (vl->meta);
466 } /* }}} int network_dispatch_values */
468 static int network_dispatch_notification (notification_t *n) /* {{{ */
472 assert (n->meta == NULL);
474 status = plugin_notification_meta_add_boolean (n, "network:received", 1);
477 ERROR ("network plugin: plugin_notification_meta_add_boolean failed.");
478 plugin_notification_meta_free (n->meta);
483 status = plugin_dispatch_notification (n);
485 plugin_notification_meta_free (n->meta);
489 } /* }}} int network_dispatch_notification */
492 static int network_init_gcrypt (void) /* {{{ */
496 /* http://lists.gnupg.org/pipermail/gcrypt-devel/2003-August/000458.html
497 * Because you can't know in a library whether another library has
498 * already initialized the library */
499 if (gcry_control (GCRYCTL_ANY_INITIALIZATION_P))
502 /* http://www.gnupg.org/documentation/manuals/gcrypt/Multi_002dThreading.html
503 * To ensure thread-safety, it's important to set GCRYCTL_SET_THREAD_CBS
504 * *before* initalizing Libgcrypt with gcry_check_version(), which itself must
505 * be called before any other gcry_* function. GCRYCTL_ANY_INITIALIZATION_P
506 * above doesn't count, as it doesn't implicitly initalize Libgcrypt.
508 * tl;dr: keep all these gry_* statements in this exact order please. */
509 # if GCRYPT_VERSION_NUMBER < 0x010600
510 err = gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
513 ERROR ("network plugin: gcry_control (GCRYCTL_SET_THREAD_CBS) failed: %s", gcry_strerror (err));
518 gcry_check_version (NULL);
520 err = gcry_control (GCRYCTL_INIT_SECMEM, 32768);
523 ERROR ("network plugin: gcry_control (GCRYCTL_INIT_SECMEM) failed: %s", gcry_strerror (err));
527 gcry_control (GCRYCTL_INITIALIZATION_FINISHED);
529 } /* }}} int network_init_gcrypt */
531 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
532 const void *iv, size_t iv_size, const char *username)
535 gcry_cipher_hd_t *cyper_ptr;
536 unsigned char password_hash[32];
538 if (se->type == SOCKENT_TYPE_CLIENT)
540 cyper_ptr = &se->data.client.cypher;
541 memcpy (password_hash, se->data.client.password_hash,
542 sizeof (password_hash));
548 cyper_ptr = &se->data.server.cypher;
550 if (username == NULL)
553 secret = fbh_get (se->data.server.userdb, username);
557 gcry_md_hash_buffer (GCRY_MD_SHA256,
559 secret, strlen (secret));
564 if (*cyper_ptr == NULL)
566 err = gcry_cipher_open (cyper_ptr,
567 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
570 ERROR ("network plugin: gcry_cipher_open returned: %s",
571 gcry_strerror (err));
578 gcry_cipher_reset (*cyper_ptr);
580 assert (*cyper_ptr != NULL);
582 err = gcry_cipher_setkey (*cyper_ptr,
583 password_hash, sizeof (password_hash));
586 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
587 gcry_strerror (err));
588 gcry_cipher_close (*cyper_ptr);
593 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
596 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
597 gcry_strerror (err));
598 gcry_cipher_close (*cyper_ptr);
604 } /* }}} int network_get_aes256_cypher */
605 #endif /* HAVE_LIBGCRYPT */
607 static int write_part_values (char **ret_buffer, size_t *ret_buffer_len,
608 const data_set_t *ds, const value_list_t *vl)
614 part_header_t pkg_ph;
615 uint16_t pkg_num_values;
616 uint8_t *pkg_values_types;
621 num_values = vl->values_len;
622 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
623 + (num_values * sizeof (uint8_t))
624 + (num_values * sizeof (value_t));
626 if (*ret_buffer_len < packet_len)
629 pkg_values_types = malloc (num_values * sizeof (*pkg_values_types));
630 if (pkg_values_types == NULL)
632 ERROR ("network plugin: write_part_values: malloc failed.");
636 pkg_values = malloc (num_values * sizeof (*pkg_values));
637 if (pkg_values == NULL)
639 free (pkg_values_types);
640 ERROR ("network plugin: write_part_values: malloc failed.");
644 pkg_ph.type = htons (TYPE_VALUES);
645 pkg_ph.length = htons (packet_len);
647 pkg_num_values = htons ((uint16_t) vl->values_len);
649 for (int i = 0; i < num_values; i++)
651 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
652 switch (ds->ds[i].type)
654 case DS_TYPE_COUNTER:
655 pkg_values[i].counter = htonll (vl->values[i].counter);
659 pkg_values[i].gauge = htond (vl->values[i].gauge);
663 pkg_values[i].derive = htonll (vl->values[i].derive);
666 case DS_TYPE_ABSOLUTE:
667 pkg_values[i].absolute = htonll (vl->values[i].absolute);
671 free (pkg_values_types);
673 ERROR ("network plugin: write_part_values: "
674 "Unknown data source type: %i",
677 } /* switch (ds->ds[i].type) */
678 } /* for (num_values) */
681 * Use `memcpy' to write everything to the buffer, because the pointer
682 * may be unaligned and some architectures, such as SPARC, can't handle
685 packet_ptr = *ret_buffer;
687 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
688 offset += sizeof (pkg_ph);
689 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
690 offset += sizeof (pkg_num_values);
691 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
692 offset += num_values * sizeof (uint8_t);
693 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
694 offset += num_values * sizeof (value_t);
696 assert (offset == packet_len);
698 *ret_buffer = packet_ptr + packet_len;
699 *ret_buffer_len -= packet_len;
701 free (pkg_values_types);
705 } /* int write_part_values */
707 static int write_part_number (char **ret_buffer, size_t *ret_buffer_len,
708 int type, uint64_t value)
713 part_header_t pkg_head;
718 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
720 if (*ret_buffer_len < packet_len)
723 pkg_head.type = htons (type);
724 pkg_head.length = htons (packet_len);
725 pkg_value = htonll (value);
727 packet_ptr = *ret_buffer;
729 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
730 offset += sizeof (pkg_head);
731 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
732 offset += sizeof (pkg_value);
734 assert (offset == packet_len);
736 *ret_buffer = packet_ptr + packet_len;
737 *ret_buffer_len -= packet_len;
740 } /* int write_part_number */
742 static int write_part_string (char **ret_buffer, size_t *ret_buffer_len,
743 int type, const char *str, size_t str_len)
753 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
754 if (*ret_buffer_len < buffer_len)
757 pkg_type = htons (type);
758 pkg_length = htons (buffer_len);
760 buffer = *ret_buffer;
762 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
763 offset += sizeof (pkg_type);
764 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
765 offset += sizeof (pkg_length);
766 memcpy (buffer + offset, str, str_len);
768 memset (buffer + offset, '\0', 1);
771 assert (offset == buffer_len);
773 *ret_buffer = buffer + buffer_len;
774 *ret_buffer_len -= buffer_len;
777 } /* int write_part_string */
779 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
780 value_t **ret_values, size_t *ret_num_values)
782 char *buffer = *ret_buffer;
783 size_t buffer_len = *ret_buffer_len;
797 NOTICE ("network plugin: packet is too short: "
798 "buffer_len = %zu", buffer_len);
802 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
803 buffer += sizeof (tmp16);
804 pkg_type = ntohs (tmp16);
806 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
807 buffer += sizeof (tmp16);
808 pkg_length = ntohs (tmp16);
810 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
811 buffer += sizeof (tmp16);
812 pkg_numval = (size_t) ntohs (tmp16);
814 assert (pkg_type == TYPE_VALUES);
816 exp_size = 3 * sizeof (uint16_t)
817 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
818 if (buffer_len < exp_size)
820 WARNING ("network plugin: parse_part_values: "
822 "Chunk of size %zu expected, "
823 "but buffer has only %zu bytes left.",
824 exp_size, buffer_len);
827 assert (pkg_numval <= ((buffer_len - 6) / 9));
829 if (pkg_length != exp_size)
831 WARNING ("network plugin: parse_part_values: "
832 "Length and number of values "
833 "in the packet don't match.");
837 pkg_types = calloc (pkg_numval, sizeof (*pkg_types));
838 pkg_values = calloc (pkg_numval, sizeof (*pkg_values));
839 if ((pkg_types == NULL) || (pkg_values == NULL))
843 ERROR ("network plugin: parse_part_values: calloc failed.");
847 memcpy (pkg_types, buffer, pkg_numval * sizeof (*pkg_types));
848 buffer += pkg_numval * sizeof (*pkg_types);
849 memcpy (pkg_values, buffer, pkg_numval * sizeof (*pkg_values));
850 buffer += pkg_numval * sizeof (*pkg_values);
852 for (size_t i = 0; i < pkg_numval; i++)
854 switch (pkg_types[i])
856 case DS_TYPE_COUNTER:
857 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
861 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
865 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
868 case DS_TYPE_ABSOLUTE:
869 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
873 NOTICE ("network plugin: parse_part_values: "
874 "Don't know how to handle data source type %"PRIu8,
879 } /* switch (pkg_types[i]) */
882 *ret_buffer = buffer;
883 *ret_buffer_len = buffer_len - pkg_length;
884 *ret_num_values = pkg_numval;
885 *ret_values = pkg_values;
890 } /* int parse_part_values */
892 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
895 char *buffer = *ret_buffer;
896 size_t buffer_len = *ret_buffer_len;
900 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
904 if (buffer_len < exp_size)
906 WARNING ("network plugin: parse_part_number: "
908 "Chunk of size %zu expected, "
909 "but buffer has only %zu bytes left.",
910 exp_size, buffer_len);
914 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
915 buffer += sizeof (tmp16);
916 /* pkg_type = ntohs (tmp16); */
918 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
919 buffer += sizeof (tmp16);
920 pkg_length = ntohs (tmp16);
922 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
923 buffer += sizeof (tmp64);
924 *value = ntohll (tmp64);
926 *ret_buffer = buffer;
927 *ret_buffer_len = buffer_len - pkg_length;
930 } /* int parse_part_number */
932 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
933 char *output, size_t const output_len)
935 char *buffer = *ret_buffer;
936 size_t buffer_len = *ret_buffer_len;
939 size_t const header_size = 2 * sizeof (uint16_t);
947 if (buffer_len < header_size)
949 WARNING ("network plugin: parse_part_string: "
951 "Chunk of at least size %zu expected, "
952 "but buffer has only %zu bytes left.",
953 header_size, buffer_len);
957 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
958 buffer += sizeof (tmp16);
959 /* pkg_type = ntohs (tmp16); */
961 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
962 buffer += sizeof (tmp16);
963 pkg_length = ntohs (tmp16);
964 payload_size = ((size_t) pkg_length) - header_size;
966 /* Check that packet fits in the input buffer */
967 if (pkg_length > buffer_len)
969 WARNING ("network plugin: parse_part_string: "
971 "Chunk of size %"PRIu16" received, "
972 "but buffer has only %zu bytes left.",
973 pkg_length, buffer_len);
977 /* Check that pkg_length is in the valid range */
978 if (pkg_length <= header_size)
980 WARNING ("network plugin: parse_part_string: "
982 "Header claims this packet is only %hu "
983 "bytes long.", pkg_length);
987 /* Check that the package data fits into the output buffer.
988 * The previous if-statement ensures that:
989 * `pkg_length > header_size' */
990 if (output_len < payload_size)
992 WARNING ("network plugin: parse_part_string: "
994 "Output buffer holds %zu bytes, "
995 "which is too small to hold the received "
997 output_len, payload_size);
1001 /* All sanity checks successfull, let's copy the data over */
1002 memcpy ((void *) output, (void *) buffer, payload_size);
1003 buffer += payload_size;
1005 /* For some very weird reason '\0' doesn't do the trick on SPARC in
1006 * this statement. */
1007 if (output[payload_size - 1] != 0)
1009 WARNING ("network plugin: parse_part_string: "
1010 "Received string does not end "
1011 "with a NULL-byte.");
1015 *ret_buffer = buffer;
1016 *ret_buffer_len = buffer_len - pkg_length;
1019 } /* int parse_part_string */
1021 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
1022 * parse_packet and vice versa. */
1023 #define PP_SIGNED 0x01
1024 #define PP_ENCRYPTED 0x02
1025 static int parse_packet (sockent_t *se,
1026 void *buffer, size_t buffer_size, int flags,
1027 const char *username);
1029 #define BUFFER_READ(p,s) do { \
1030 memcpy ((p), buffer + buffer_offset, (s)); \
1031 buffer_offset += (s); \
1035 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1036 void **ret_buffer, size_t *ret_buffer_len, int flags)
1038 static c_complain_t complain_no_users = C_COMPLAIN_INIT_STATIC;
1042 size_t buffer_offset;
1044 size_t username_len;
1047 part_signature_sha256_t pss;
1048 uint16_t pss_head_length;
1049 char hash[sizeof (pss.hash)];
1053 unsigned char *hash_ptr;
1055 buffer = *ret_buffer;
1056 buffer_len = *ret_buffer_len;
1059 if (se->data.server.userdb == NULL)
1061 c_complain (LOG_NOTICE, &complain_no_users,
1062 "network plugin: Received signed network packet but can't verify it "
1063 "because no user DB has been configured. Will accept it.");
1067 /* Check if the buffer has enough data for this structure. */
1068 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
1071 /* Read type and length header */
1072 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1073 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1074 pss_head_length = ntohs (pss.head.length);
1076 /* Check if the `pss_head_length' is within bounds. */
1077 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
1078 || (pss_head_length > buffer_len))
1080 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
1084 /* Copy the hash. */
1085 BUFFER_READ (pss.hash, sizeof (pss.hash));
1087 /* Calculate username length (without null byte) and allocate memory */
1088 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
1089 pss.username = malloc (username_len + 1);
1090 if (pss.username == NULL)
1093 /* Read the username */
1094 BUFFER_READ (pss.username, username_len);
1095 pss.username[username_len] = 0;
1097 assert (buffer_offset == pss_head_length);
1099 /* Query the password */
1100 secret = fbh_get (se->data.server.userdb, pss.username);
1103 ERROR ("network plugin: Unknown user: %s", pss.username);
1104 sfree (pss.username);
1108 /* Create a hash device and check the HMAC */
1110 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
1113 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
1114 gcry_strerror (err));
1116 sfree (pss.username);
1120 err = gcry_md_setkey (hd, secret, strlen (secret));
1123 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
1126 sfree (pss.username);
1131 buffer + PART_SIGNATURE_SHA256_SIZE,
1132 buffer_len - PART_SIGNATURE_SHA256_SIZE);
1133 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
1134 if (hash_ptr == NULL)
1136 ERROR ("network plugin: gcry_md_read failed.");
1139 sfree (pss.username);
1142 memcpy (hash, hash_ptr, sizeof (hash));
1148 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1150 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1151 "Hash mismatch. Username: %s", pss.username);
1155 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1156 flags | PP_SIGNED, pss.username);
1160 sfree (pss.username);
1162 *ret_buffer = buffer + buffer_len;
1163 *ret_buffer_len = 0;
1166 } /* }}} int parse_part_sign_sha256 */
1167 /* #endif HAVE_LIBGCRYPT */
1169 #else /* if !HAVE_LIBGCRYPT */
1170 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1171 void **ret_buffer, size_t *ret_buffer_size, int flags)
1173 static int warning_has_been_printed = 0;
1177 size_t buffer_offset;
1180 part_signature_sha256_t pss;
1182 buffer = *ret_buffer;
1183 buffer_size = *ret_buffer_size;
1186 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1189 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1190 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1191 part_len = ntohs (pss.head.length);
1193 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1194 || (part_len > buffer_size))
1197 if (warning_has_been_printed == 0)
1199 WARNING ("network plugin: Received signed packet, but the network "
1200 "plugin was not linked with libgcrypt, so I cannot "
1201 "verify the signature. The packet will be accepted.");
1202 warning_has_been_printed = 1;
1205 parse_packet (se, buffer + part_len, buffer_size - part_len, flags,
1206 /* username = */ NULL);
1208 *ret_buffer = buffer + buffer_size;
1209 *ret_buffer_size = 0;
1212 } /* }}} int parse_part_sign_sha256 */
1213 #endif /* !HAVE_LIBGCRYPT */
1216 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1217 void **ret_buffer, size_t *ret_buffer_len,
1220 char *buffer = *ret_buffer;
1221 size_t buffer_len = *ret_buffer_len;
1224 size_t buffer_offset;
1225 uint16_t username_len;
1226 part_encryption_aes256_t pea;
1227 unsigned char hash[sizeof (pea.hash)] = { 0 };
1229 gcry_cipher_hd_t cypher;
1232 /* Make sure at least the header if available. */
1233 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1235 NOTICE ("network plugin: parse_part_encr_aes256: "
1236 "Discarding short packet.");
1242 /* Copy the unencrypted information into `pea'. */
1243 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1244 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1246 /* Check the `part size'. */
1247 part_size = ntohs (pea.head.length);
1248 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1249 || (part_size > buffer_len))
1251 NOTICE ("network plugin: parse_part_encr_aes256: "
1252 "Discarding part with invalid size.");
1256 /* Read the username */
1257 BUFFER_READ (&username_len, sizeof (username_len));
1258 username_len = ntohs (username_len);
1260 if ((username_len == 0)
1261 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1263 NOTICE ("network plugin: parse_part_encr_aes256: "
1264 "Discarding part with invalid username length.");
1268 assert (username_len > 0);
1269 pea.username = malloc (username_len + 1);
1270 if (pea.username == NULL)
1272 BUFFER_READ (pea.username, username_len);
1273 pea.username[username_len] = 0;
1275 /* Last but not least, the initialization vector */
1276 BUFFER_READ (pea.iv, sizeof (pea.iv));
1278 /* Make sure we are at the right position */
1279 assert (buffer_offset == (username_len +
1280 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1282 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1286 ERROR ("network plugin: Failed to get cypher. Username: %s", pea.username);
1287 sfree (pea.username);
1291 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1292 assert (payload_len > 0);
1294 /* Decrypt the packet in-place */
1295 err = gcry_cipher_decrypt (cypher,
1296 buffer + buffer_offset,
1297 part_size - buffer_offset,
1298 /* in = */ NULL, /* in len = */ 0);
1301 sfree (pea.username);
1302 ERROR ("network plugin: gcry_cipher_decrypt returned: %s. Username: %s",
1303 gcry_strerror (err), pea.username);
1308 BUFFER_READ (pea.hash, sizeof (pea.hash));
1310 /* Make sure we're at the right position - again */
1311 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1312 assert (buffer_offset == (part_size - payload_len));
1314 /* Check hash sum */
1315 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1316 buffer + buffer_offset, payload_len);
1317 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1319 ERROR ("network plugin: Checksum mismatch. Username: %s", pea.username);
1320 sfree (pea.username);
1324 parse_packet (se, buffer + buffer_offset, payload_len,
1325 flags | PP_ENCRYPTED, pea.username);
1327 /* XXX: Free pea.username?!? */
1329 /* Update return values */
1330 *ret_buffer = buffer + part_size;
1331 *ret_buffer_len = buffer_len - part_size;
1333 sfree (pea.username);
1336 } /* }}} int parse_part_encr_aes256 */
1337 /* #endif HAVE_LIBGCRYPT */
1339 #else /* if !HAVE_LIBGCRYPT */
1340 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1341 void **ret_buffer, size_t *ret_buffer_size, int flags)
1343 static int warning_has_been_printed = 0;
1347 size_t buffer_offset;
1352 buffer = *ret_buffer;
1353 buffer_size = *ret_buffer_size;
1356 /* parse_packet assures this minimum size. */
1357 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1359 BUFFER_READ (&ph.type, sizeof (ph.type));
1360 BUFFER_READ (&ph.length, sizeof (ph.length));
1361 ph_length = ntohs (ph.length);
1363 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1364 || (ph_length > buffer_size))
1366 ERROR ("network plugin: AES-256 encrypted part "
1367 "with invalid length received.");
1371 if (warning_has_been_printed == 0)
1373 WARNING ("network plugin: Received encrypted packet, but the network "
1374 "plugin was not linked with libgcrypt, so I cannot "
1375 "decrypt it. The part will be discarded.");
1376 warning_has_been_printed = 1;
1379 *ret_buffer = (void *) (((char *) *ret_buffer) + ph_length);
1380 *ret_buffer_size -= ph_length;
1383 } /* }}} int parse_part_encr_aes256 */
1384 #endif /* !HAVE_LIBGCRYPT */
1388 static int parse_packet (sockent_t *se, /* {{{ */
1389 void *buffer, size_t buffer_size, int flags,
1390 const char *username)
1394 value_list_t vl = VALUE_LIST_INIT;
1395 notification_t n = { 0 };
1398 int packet_was_signed = (flags & PP_SIGNED);
1399 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1400 int printed_ignore_warning = 0;
1401 #endif /* HAVE_LIBGCRYPT */
1404 memset (&vl, '\0', sizeof (vl));
1407 while ((status == 0) && (0 < buffer_size)
1408 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1410 uint16_t pkg_length;
1413 memcpy ((void *) &pkg_type,
1416 memcpy ((void *) &pkg_length,
1417 (void *) (((char *) buffer) + sizeof (pkg_type)),
1418 sizeof (pkg_length));
1420 pkg_length = ntohs (pkg_length);
1421 pkg_type = ntohs (pkg_type);
1423 if (pkg_length > buffer_size)
1425 /* Ensure that this loop terminates eventually */
1426 if (pkg_length < (2 * sizeof (uint16_t)))
1429 if (pkg_type == TYPE_ENCR_AES256)
1431 status = parse_part_encr_aes256 (se,
1432 &buffer, &buffer_size, flags);
1435 ERROR ("network plugin: Decrypting AES256 "
1437 "with status %i.", status);
1442 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1443 && (packet_was_encrypted == 0))
1445 if (printed_ignore_warning == 0)
1447 INFO ("network plugin: Unencrypted packet or "
1448 "part has been ignored.");
1449 printed_ignore_warning = 1;
1451 buffer = ((char *) buffer) + pkg_length;
1452 buffer_size -= (size_t) pkg_length;
1455 #endif /* HAVE_LIBGCRYPT */
1456 else if (pkg_type == TYPE_SIGN_SHA256)
1458 status = parse_part_sign_sha256 (se,
1459 &buffer, &buffer_size, flags);
1462 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1464 "with status %i.", status);
1469 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1470 && (packet_was_encrypted == 0)
1471 && (packet_was_signed == 0))
1473 if (printed_ignore_warning == 0)
1475 INFO ("network plugin: Unsigned packet or "
1476 "part has been ignored.");
1477 printed_ignore_warning = 1;
1479 buffer = ((char *) buffer) + pkg_length;
1480 buffer_size -= (size_t) pkg_length;
1483 #endif /* HAVE_LIBGCRYPT */
1484 else if (pkg_type == TYPE_VALUES)
1486 status = parse_part_values (&buffer, &buffer_size,
1487 &vl.values, &vl.values_len);
1491 network_dispatch_values (&vl, username);
1495 else if (pkg_type == TYPE_TIME)
1498 status = parse_part_number (&buffer, &buffer_size,
1502 vl.time = TIME_T_TO_CDTIME_T (tmp);
1503 n.time = TIME_T_TO_CDTIME_T (tmp);
1506 else if (pkg_type == TYPE_TIME_HR)
1509 status = parse_part_number (&buffer, &buffer_size,
1513 vl.time = (cdtime_t) tmp;
1514 n.time = (cdtime_t) tmp;
1517 else if (pkg_type == TYPE_INTERVAL)
1520 status = parse_part_number (&buffer, &buffer_size,
1523 vl.interval = TIME_T_TO_CDTIME_T (tmp);
1525 else if (pkg_type == TYPE_INTERVAL_HR)
1528 status = parse_part_number (&buffer, &buffer_size,
1531 vl.interval = (cdtime_t) tmp;
1533 else if (pkg_type == TYPE_HOST)
1535 status = parse_part_string (&buffer, &buffer_size,
1536 vl.host, sizeof (vl.host));
1538 sstrncpy (n.host, vl.host, sizeof (n.host));
1540 else if (pkg_type == TYPE_PLUGIN)
1542 status = parse_part_string (&buffer, &buffer_size,
1543 vl.plugin, sizeof (vl.plugin));
1545 sstrncpy (n.plugin, vl.plugin,
1548 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1550 status = parse_part_string (&buffer, &buffer_size,
1552 sizeof (vl.plugin_instance));
1554 sstrncpy (n.plugin_instance,
1556 sizeof (n.plugin_instance));
1558 else if (pkg_type == TYPE_TYPE)
1560 status = parse_part_string (&buffer, &buffer_size,
1561 vl.type, sizeof (vl.type));
1563 sstrncpy (n.type, vl.type, sizeof (n.type));
1565 else if (pkg_type == TYPE_TYPE_INSTANCE)
1567 status = parse_part_string (&buffer, &buffer_size,
1569 sizeof (vl.type_instance));
1571 sstrncpy (n.type_instance, vl.type_instance,
1572 sizeof (n.type_instance));
1574 else if (pkg_type == TYPE_MESSAGE)
1576 status = parse_part_string (&buffer, &buffer_size,
1577 n.message, sizeof (n.message));
1583 else if ((n.severity != NOTIF_FAILURE)
1584 && (n.severity != NOTIF_WARNING)
1585 && (n.severity != NOTIF_OKAY))
1587 INFO ("network plugin: "
1588 "Ignoring notification with "
1589 "unknown severity %i.",
1592 else if (n.time == 0)
1594 INFO ("network plugin: "
1595 "Ignoring notification with "
1598 else if (strlen (n.message) == 0)
1600 INFO ("network plugin: "
1601 "Ignoring notification with "
1602 "an empty message.");
1606 network_dispatch_notification (&n);
1609 else if (pkg_type == TYPE_SEVERITY)
1612 status = parse_part_number (&buffer, &buffer_size,
1615 n.severity = (int) tmp;
1619 DEBUG ("network plugin: parse_packet: Unknown part"
1620 " type: 0x%04hx", pkg_type);
1621 buffer = ((char *) buffer) + pkg_length;
1622 buffer_size -= (size_t) pkg_length;
1624 } /* while (buffer_size > sizeof (part_header_t)) */
1626 if (status == 0 && buffer_size > 0)
1627 WARNING ("network plugin: parse_packet: Received truncated "
1628 "packet, try increasing `MaxPacketSize'");
1631 } /* }}} int parse_packet */
1633 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1642 sfree (sec->username);
1643 sfree (sec->password);
1644 if (sec->cypher != NULL)
1645 gcry_cipher_close (sec->cypher);
1647 } /* }}} void free_sockent_client */
1649 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1651 for (size_t i = 0; i < ses->fd_num; i++)
1653 if (ses->fd[i] >= 0)
1662 sfree (ses->auth_file);
1663 fbh_destroy (ses->userdb);
1664 if (ses->cypher != NULL)
1665 gcry_cipher_close (ses->cypher);
1667 } /* }}} void free_sockent_server */
1669 static void sockent_destroy (sockent_t *se) /* {{{ */
1673 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1680 sfree (se->service);
1682 if (se->type == SOCKENT_TYPE_CLIENT)
1683 free_sockent_client (&se->data.client);
1685 free_sockent_server (&se->data.server);
1690 } /* }}} void sockent_destroy */
1693 * int network_set_ttl
1695 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1696 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1698 * The `struct addrinfo' is used to destinguish between unicast and multicast
1701 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1703 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1704 network_config_ttl);
1706 assert (se->type == SOCKENT_TYPE_CLIENT);
1708 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1711 if (ai->ai_family == AF_INET)
1713 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1716 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1717 optname = IP_MULTICAST_TTL;
1721 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1722 &network_config_ttl,
1723 sizeof (network_config_ttl)) != 0)
1726 ERROR ("network plugin: setsockopt (ipv4-ttl): %s",
1727 sstrerror (errno, errbuf, sizeof (errbuf)));
1731 else if (ai->ai_family == AF_INET6)
1733 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1734 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1737 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1738 optname = IPV6_MULTICAST_HOPS;
1740 optname = IPV6_UNICAST_HOPS;
1742 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1743 &network_config_ttl,
1744 sizeof (network_config_ttl)) != 0)
1747 ERROR ("network plugin: setsockopt(ipv6-ttl): %s",
1748 sstrerror (errno, errbuf,
1755 } /* int network_set_ttl */
1757 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1759 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1762 assert (se->type == SOCKENT_TYPE_CLIENT);
1764 if (ai->ai_family == AF_INET)
1766 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1768 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1770 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1771 /* If possible, use the "ip_mreqn" structure which has
1772 * an "interface index" member. Using the interface
1773 * index is preferred here, because of its similarity
1774 * to the way IPv6 handles this. Unfortunately, it
1775 * appears not to be portable. */
1776 struct ip_mreqn mreq = {
1777 .imr_multiaddr.s_addr = addr->sin_addr.s_addr,
1778 .imr_address.s_addr = ntohl (INADDR_ANY),
1779 .imr_ifindex = se->interface
1782 struct ip_mreq mreq = {
1783 .imr_multiaddr.s_addr = addr->sin_addr.s_addr,
1784 .imr_interface.s_addr = ntohl (INADDR_ANY)
1788 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1789 &mreq, sizeof (mreq)) != 0)
1792 ERROR ("network plugin: setsockopt (ipv4-multicast-if): %s",
1793 sstrerror (errno, errbuf, sizeof (errbuf)));
1800 else if (ai->ai_family == AF_INET6)
1802 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1804 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1806 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1808 sizeof (se->interface)) != 0)
1811 ERROR ("network plugin: setsockopt (ipv6-multicast-if): %s",
1812 sstrerror (errno, errbuf,
1821 /* else: Not a multicast interface. */
1822 if (se->interface != 0)
1824 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1825 char interface_name[IFNAMSIZ];
1827 if (if_indextoname (se->interface, interface_name) == NULL)
1830 DEBUG ("network plugin: Binding socket to interface %s", interface_name);
1832 if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
1834 sizeof(interface_name)) == -1 )
1837 ERROR ("network plugin: setsockopt (bind-if): %s",
1838 sstrerror (errno, errbuf, sizeof (errbuf)));
1841 /* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1844 WARNING ("network plugin: Cannot set the interface on a unicast "
1846 # if !defined(SO_BINDTODEVICE)
1847 "the \"SO_BINDTODEVICE\" socket option "
1849 "the \"if_indextoname\" function "
1851 "is not available on your system.");
1857 } /* }}} network_set_interface */
1859 static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
1868 /* allow multiple sockets to use the same PORT number */
1869 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1870 &yes, sizeof(yes)) == -1) {
1872 ERROR ("network plugin: setsockopt (reuseaddr): %s",
1873 sstrerror (errno, errbuf, sizeof (errbuf)));
1877 DEBUG ("fd = %i; calling `bind'", fd);
1879 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1883 sstrerror (errno, errbuf, sizeof (errbuf)));
1887 if (ai->ai_family == AF_INET)
1889 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1890 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1892 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1893 struct ip_mreqn mreq;
1895 struct ip_mreq mreq;
1898 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1900 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1901 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1902 /* Set the interface using the interface index if
1903 * possible (available). Unfortunately, the struct
1904 * ip_mreqn is not portable. */
1905 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1906 mreq.imr_ifindex = interface_idx;
1908 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1911 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1912 &loop, sizeof (loop)) == -1)
1915 ERROR ("network plugin: setsockopt (multicast-loop): %s",
1916 sstrerror (errno, errbuf,
1921 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1922 &mreq, sizeof (mreq)) == -1)
1925 ERROR ("network plugin: setsockopt (add-membership): %s",
1926 sstrerror (errno, errbuf,
1934 else if (ai->ai_family == AF_INET6)
1936 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1937 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1938 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1940 struct ipv6_mreq mreq;
1942 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1944 memcpy (&mreq.ipv6mr_multiaddr,
1946 sizeof (addr->sin6_addr));
1948 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1949 * ipv6mr_interface may be set to zeroes to
1950 * choose the default multicast interface or to
1951 * the index of a particular multicast-capable
1952 * interface if the host is multihomed.
1953 * Membership is associ-associated with a
1954 * single interface; programs running on
1955 * multihomed hosts may need to join the same
1956 * group on more than one interface.*/
1957 mreq.ipv6mr_interface = interface_idx;
1959 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1960 &loop, sizeof (loop)) == -1)
1963 ERROR ("network plugin: setsockopt (ipv6-multicast-loop): %s",
1964 sstrerror (errno, errbuf,
1969 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1970 &mreq, sizeof (mreq)) == -1)
1973 ERROR ("network plugin: setsockopt (ipv6-add-membership): %s",
1974 sstrerror (errno, errbuf,
1983 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1984 /* if a specific interface was set, bind the socket to it. But to avoid
1985 * possible problems with multicast routing, only do that for non-multicast
1987 if (interface_idx != 0)
1989 char interface_name[IFNAMSIZ];
1991 if (if_indextoname (interface_idx, interface_name) == NULL)
1994 DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
1996 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
1998 sizeof(interface_name)) == -1 )
2001 ERROR ("network plugin: setsockopt (bind-if): %s",
2002 sstrerror (errno, errbuf, sizeof (errbuf)));
2006 #endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
2009 } /* int network_bind_socket */
2011 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
2012 * or `SOCKENT_TYPE_SERVER' */
2013 static sockent_t *sockent_create (int type) /* {{{ */
2017 if ((type != SOCKENT_TYPE_CLIENT) && (type != SOCKENT_TYPE_SERVER))
2020 se = calloc (1, sizeof (*se));
2030 if (type == SOCKENT_TYPE_SERVER)
2032 se->data.server.fd = NULL;
2033 se->data.server.fd_num = 0;
2035 se->data.server.security_level = SECURITY_LEVEL_NONE;
2036 se->data.server.auth_file = NULL;
2037 se->data.server.userdb = NULL;
2038 se->data.server.cypher = NULL;
2043 se->data.client.fd = -1;
2044 se->data.client.addr = NULL;
2045 se->data.client.resolve_interval = 0;
2046 se->data.client.next_resolve_reconnect = 0;
2048 se->data.client.security_level = SECURITY_LEVEL_NONE;
2049 se->data.client.username = NULL;
2050 se->data.client.password = NULL;
2051 se->data.client.cypher = NULL;
2056 } /* }}} sockent_t *sockent_create */
2058 static int sockent_init_crypto (sockent_t *se) /* {{{ */
2060 #if HAVE_LIBGCRYPT /* {{{ */
2061 if (se->type == SOCKENT_TYPE_CLIENT)
2063 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
2065 if (network_init_gcrypt () < 0)
2067 ERROR ("network plugin: Cannot configure client socket with "
2068 "security: Failed to initialize crypto library.");
2072 if ((se->data.client.username == NULL)
2073 || (se->data.client.password == NULL))
2075 ERROR ("network plugin: Client socket with "
2076 "security requested, but no "
2077 "credentials are configured.");
2080 gcry_md_hash_buffer (GCRY_MD_SHA256,
2081 se->data.client.password_hash,
2082 se->data.client.password,
2083 strlen (se->data.client.password));
2086 else /* (se->type == SOCKENT_TYPE_SERVER) */
2088 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
2089 && (se->data.server.auth_file == NULL))
2091 ERROR ("network plugin: Server socket with security requested, "
2092 "but no \"AuthFile\" is configured.");
2095 if (se->data.server.auth_file != NULL)
2097 if (network_init_gcrypt () < 0)
2099 ERROR ("network plugin: Cannot configure server socket with security: "
2100 "Failed to initialize crypto library.");
2104 se->data.server.userdb = fbh_create (se->data.server.auth_file);
2105 if (se->data.server.userdb == NULL)
2107 ERROR ("network plugin: Reading password file \"%s\" failed.",
2108 se->data.server.auth_file);
2113 #endif /* }}} HAVE_LIBGCRYPT */
2116 } /* }}} int sockent_init_crypto */
2118 static int sockent_client_disconnect (sockent_t *se) /* {{{ */
2120 struct sockent_client *client;
2122 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2125 client = &se->data.client;
2126 if (client->fd >= 0) /* connected */
2132 sfree (client->addr);
2133 client->addrlen = 0;
2136 } /* }}} int sockent_client_disconnect */
2138 static int sockent_client_connect (sockent_t *se) /* {{{ */
2140 static c_complain_t complaint = C_COMPLAIN_INIT_STATIC;
2142 struct sockent_client *client;
2143 struct addrinfo *ai_list;
2145 _Bool reconnect = 0;
2148 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2151 client = &se->data.client;
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));
2160 if (client->fd >= 0 && !reconnect) /* already connected and not stale*/
2163 struct addrinfo ai_hints = {
2164 .ai_family = AF_UNSPEC,
2165 .ai_flags = AI_ADDRCONFIG,
2166 .ai_protocol = IPPROTO_UDP,
2167 .ai_socktype = SOCK_DGRAM
2170 status = getaddrinfo (se->node,
2171 (se->service != NULL) ? se->service : NET_DEFAULT_PORT,
2172 &ai_hints, &ai_list);
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));
2184 c_release (LOG_NOTICE, &complaint,
2185 "network plugin: Successfully resolved \"%s\".",
2189 for (struct addrinfo *ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
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);
2200 ERROR ("network plugin: socket(2) failed: %s",
2201 sstrerror (errno, errbuf,
2206 client->addr = calloc (1, sizeof (*client->addr));
2207 if (client->addr == NULL)
2209 ERROR ("network plugin: calloc failed.");
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.. */
2227 freeaddrinfo (ai_list);
2231 if (client->resolve_interval > 0)
2232 client->next_resolve_reconnect = now + client->resolve_interval;
2234 } /* }}} int sockent_client_connect */
2236 /* Open the file descriptors for a initialized sockent structure. */
2237 static int sockent_server_listen (sockent_t *se) /* {{{ */
2239 struct addrinfo *ai_list;
2243 const char *service;
2248 assert (se->data.server.fd == NULL);
2249 assert (se->data.server.fd_num == 0);
2252 service = se->service;
2254 if (service == NULL)
2255 service = NET_DEFAULT_PORT;
2257 DEBUG ("network plugin: sockent_server_listen: node = %s; service = %s;",
2260 struct addrinfo ai_hints = {
2261 .ai_family = AF_UNSPEC,
2262 .ai_flags = AI_ADDRCONFIG | AI_PASSIVE,
2263 .ai_protocol = IPPROTO_UDP,
2264 .ai_socktype = SOCK_DGRAM
2267 status = getaddrinfo (node, service, &ai_hints, &ai_list);
2270 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
2271 (se->node == NULL) ? "(null)" : se->node,
2272 (se->service == NULL) ? "(null)" : se->service,
2273 gai_strerror (status));
2277 for (struct addrinfo *ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2281 tmp = realloc (se->data.server.fd,
2282 sizeof (*tmp) * (se->data.server.fd_num + 1));
2285 ERROR ("network plugin: realloc failed.");
2288 se->data.server.fd = tmp;
2289 tmp = se->data.server.fd + se->data.server.fd_num;
2291 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
2292 ai_ptr->ai_protocol);
2296 ERROR ("network plugin: socket(2) failed: %s",
2297 sstrerror (errno, errbuf,
2302 status = network_bind_socket (*tmp, ai_ptr, se->interface);
2310 se->data.server.fd_num++;
2312 } /* for (ai_list) */
2314 freeaddrinfo (ai_list);
2316 if (se->data.server.fd_num == 0)
2319 } /* }}} int sockent_server_listen */
2321 /* Add a sockent to the global list of sockets */
2322 static int sockent_add (sockent_t *se) /* {{{ */
2324 sockent_t *last_ptr;
2329 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 (size_t 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];
2445 receive_list_entry_t *private_list_head;
2446 receive_list_entry_t *private_list_tail;
2447 uint64_t private_list_length;
2449 assert (listen_sockets_num > 0);
2451 private_list_head = NULL;
2452 private_list_tail = NULL;
2453 private_list_length = 0;
2455 while (listen_loop == 0)
2457 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2463 ERROR ("network plugin: poll(2) failed: %s",
2464 sstrerror (errno, errbuf, sizeof (errbuf)));
2468 for (size_t i = 0; (i < listen_sockets_num) && (status > 0); i++)
2470 receive_list_entry_t *ent;
2472 if ((listen_sockets_pollfd[i].revents
2473 & (POLLIN | POLLPRI)) == 0)
2477 buffer_len = recv (listen_sockets_pollfd[i].fd,
2478 buffer, sizeof (buffer),
2483 status = (errno != 0) ? errno : -1;
2484 ERROR ("network plugin: recv(2) failed: %s",
2485 sstrerror (errno, errbuf, sizeof (errbuf)));
2489 stats_octets_rx += ((uint64_t) buffer_len);
2492 /* TODO: Possible performance enhancement: Do not free
2493 * these entries in the dispatch thread but put them in
2494 * another list, so we don't have to allocate more and
2495 * more of these structures. */
2496 ent = calloc (1, sizeof (*ent));
2499 ERROR ("network plugin: calloc failed.");
2504 ent->data = malloc (network_config_packet_size);
2505 if (ent->data == NULL)
2508 ERROR ("network plugin: malloc failed.");
2512 ent->fd = listen_sockets_pollfd[i].fd;
2515 memcpy (ent->data, buffer, buffer_len);
2516 ent->data_len = buffer_len;
2518 if (private_list_head == NULL)
2519 private_list_head = ent;
2521 private_list_tail->next = ent;
2522 private_list_tail = ent;
2523 private_list_length++;
2525 /* Do not block here. Blocking here has led to
2526 * insufficient performance in the past. */
2527 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2529 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2530 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2532 if (receive_list_head == NULL)
2533 receive_list_head = private_list_head;
2535 receive_list_tail->next = private_list_head;
2536 receive_list_tail = private_list_tail;
2537 receive_list_length += private_list_length;
2539 pthread_cond_signal (&receive_list_cond);
2540 pthread_mutex_unlock (&receive_list_lock);
2542 private_list_head = NULL;
2543 private_list_tail = NULL;
2544 private_list_length = 0;
2548 } /* for (listen_sockets_pollfd) */
2552 } /* while (listen_loop == 0) */
2554 /* Make sure everything is dispatched before exiting. */
2555 if (private_list_head != NULL)
2557 pthread_mutex_lock (&receive_list_lock);
2559 if (receive_list_head == NULL)
2560 receive_list_head = private_list_head;
2562 receive_list_tail->next = private_list_head;
2563 receive_list_tail = private_list_tail;
2564 receive_list_length += private_list_length;
2566 pthread_cond_signal (&receive_list_cond);
2567 pthread_mutex_unlock (&receive_list_lock);
2571 } /* }}} int network_receive */
2573 static void *receive_thread (void __attribute__((unused)) *arg)
2575 return (network_receive () ? (void *) 1 : (void *) 0);
2576 } /* void *receive_thread */
2578 static void network_init_buffer (void)
2580 memset (send_buffer, 0, network_config_packet_size);
2581 send_buffer_ptr = send_buffer;
2582 send_buffer_fill = 0;
2583 send_buffer_last_update = 0;
2585 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2586 } /* int network_init_buffer */
2588 static void network_send_buffer_plain (sockent_t *se, /* {{{ */
2589 const char *buffer, size_t buffer_size)
2595 status = sockent_client_connect (se);
2599 status = sendto (se->data.client.fd, buffer, buffer_size,
2601 (struct sockaddr *) se->data.client.addr,
2602 se->data.client.addrlen);
2607 if ((errno == EINTR) || (errno == EAGAIN))
2610 ERROR ("network plugin: sendto failed: %s. Closing sending socket.",
2611 sstrerror (errno, errbuf, sizeof (errbuf)));
2612 sockent_client_disconnect (se);
2618 } /* }}} void network_send_buffer_plain */
2621 #define BUFFER_ADD(p,s) do { \
2622 memcpy (buffer + buffer_offset, (p), (s)); \
2623 buffer_offset += (s); \
2626 static void network_send_buffer_signed (sockent_t *se, /* {{{ */
2627 const char *in_buffer, size_t in_buffer_size)
2629 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2630 size_t buffer_offset;
2631 size_t username_len;
2635 unsigned char *hash;
2638 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2641 ERROR ("network plugin: Creating HMAC object failed: %s",
2642 gcry_strerror (err));
2646 err = gcry_md_setkey (hd, se->data.client.password,
2647 strlen (se->data.client.password));
2650 ERROR ("network plugin: gcry_md_setkey failed: %s",
2651 gcry_strerror (err));
2656 username_len = strlen (se->data.client.username);
2657 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2659 ERROR ("network plugin: Username too long: %s",
2660 se->data.client.username);
2664 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2665 se->data.client.username, username_len);
2666 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2667 in_buffer, in_buffer_size);
2669 /* Initialize the `ps' structure. */
2670 part_signature_sha256_t ps = {
2671 .head.type = htons (TYPE_SIGN_SHA256),
2672 .head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len)
2675 /* Calculate the hash value. */
2676 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2677 username_len + in_buffer_size);
2678 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2681 ERROR ("network plugin: gcry_md_read failed.");
2685 memcpy (ps.hash, hash, sizeof (ps.hash));
2687 /* Add the header */
2690 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2691 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2692 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2694 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2699 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2700 network_send_buffer_plain (se, buffer, buffer_offset);
2701 } /* }}} void network_send_buffer_signed */
2703 static void network_send_buffer_encrypted (sockent_t *se, /* {{{ */
2704 const char *in_buffer, size_t in_buffer_size)
2706 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2708 size_t buffer_offset;
2710 size_t username_len;
2712 gcry_cipher_hd_t cypher;
2714 /* Initialize the header fields */
2715 part_encryption_aes256_t pea = {
2716 .head.type = htons (TYPE_ENCR_AES256),
2717 .username = se->data.client.username
2720 username_len = strlen (pea.username);
2721 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2723 ERROR ("network plugin: Username too long: %s", pea.username);
2727 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2728 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2729 - sizeof (pea.hash);
2731 assert (buffer_size <= sizeof (buffer));
2732 DEBUG ("network plugin: network_send_buffer_encrypted: "
2733 "buffer_size = %zu;", buffer_size);
2735 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2736 + username_len + in_buffer_size));
2737 pea.username_length = htons ((uint16_t) username_len);
2739 /* Chose a random initialization vector. */
2740 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2742 /* Create hash of the payload */
2743 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2745 /* Initialize the buffer */
2747 memset (buffer, 0, sizeof (buffer));
2750 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2751 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2752 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2753 BUFFER_ADD (pea.username, username_len);
2754 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2755 assert (buffer_offset == header_size);
2756 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2757 BUFFER_ADD (in_buffer, in_buffer_size);
2759 assert (buffer_offset == buffer_size);
2761 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2762 se->data.client.password);
2766 /* Encrypt the buffer in-place */
2767 err = gcry_cipher_encrypt (cypher,
2768 buffer + header_size,
2769 buffer_size - header_size,
2770 /* in = */ NULL, /* in len = */ 0);
2773 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2774 gcry_strerror (err));
2778 /* Send it out without further modifications */
2779 network_send_buffer_plain (se, buffer, buffer_size);
2780 } /* }}} void network_send_buffer_encrypted */
2782 #endif /* HAVE_LIBGCRYPT */
2784 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2786 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2788 for (sockent_t *se = sending_sockets; se != NULL; se = se->next)
2791 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2792 network_send_buffer_encrypted (se, buffer, buffer_len);
2793 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2794 network_send_buffer_signed (se, buffer, buffer_len);
2795 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2796 #endif /* HAVE_LIBGCRYPT */
2797 network_send_buffer_plain (se, buffer, buffer_len);
2798 } /* for (sending_sockets) */
2799 } /* }}} void network_send_buffer */
2801 static int add_to_buffer (char *buffer, size_t buffer_size, /* {{{ */
2802 value_list_t *vl_def,
2803 const data_set_t *ds, const value_list_t *vl)
2805 char *buffer_orig = buffer;
2807 if (strcmp (vl_def->host, vl->host) != 0)
2809 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2810 vl->host, strlen (vl->host)) != 0)
2812 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2815 if (vl_def->time != vl->time)
2817 if (write_part_number (&buffer, &buffer_size, TYPE_TIME_HR,
2818 (uint64_t) vl->time))
2820 vl_def->time = vl->time;
2823 if (vl_def->interval != vl->interval)
2825 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL_HR,
2826 (uint64_t) vl->interval))
2828 vl_def->interval = vl->interval;
2831 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2833 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2834 vl->plugin, strlen (vl->plugin)) != 0)
2836 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2839 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2841 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2842 vl->plugin_instance,
2843 strlen (vl->plugin_instance)) != 0)
2845 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2848 if (strcmp (vl_def->type, vl->type) != 0)
2850 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2851 vl->type, strlen (vl->type)) != 0)
2853 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2856 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2858 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2860 strlen (vl->type_instance)) != 0)
2862 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2865 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2868 return (buffer - buffer_orig);
2869 } /* }}} int add_to_buffer */
2871 static void flush_buffer (void)
2873 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2876 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2878 stats_octets_tx += ((uint64_t) send_buffer_fill);
2881 network_init_buffer ();
2884 static int network_write (const data_set_t *ds, const value_list_t *vl,
2885 user_data_t __attribute__((unused)) *user_data)
2889 /* listen_loop is set to non-zero in the shutdown callback, which is
2890 * guaranteed to be called *after* all the write threads have been shut
2892 assert (listen_loop == 0);
2894 if (!check_send_okay (vl))
2897 char name[6*DATA_MAX_NAME_LEN];
2898 FORMAT_VL (name, sizeof (name), vl);
2899 name[sizeof (name) - 1] = 0;
2900 DEBUG ("network plugin: network_write: "
2901 "NOT sending %s.", name);
2903 /* Counter is not protected by another lock and may be reached by
2904 * multiple threads */
2905 pthread_mutex_lock (&stats_lock);
2906 stats_values_not_sent++;
2907 pthread_mutex_unlock (&stats_lock);
2911 uc_meta_data_add_unsigned_int (vl,
2912 "network:time_sent", (uint64_t) vl->time);
2914 pthread_mutex_lock (&send_buffer_lock);
2916 status = add_to_buffer (send_buffer_ptr,
2917 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2922 /* status == bytes added to the buffer */
2923 send_buffer_fill += status;
2924 send_buffer_ptr += status;
2925 send_buffer_last_update = cdtime();
2927 stats_values_sent++;
2933 status = add_to_buffer (send_buffer_ptr,
2934 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2940 send_buffer_fill += status;
2941 send_buffer_ptr += status;
2943 stats_values_sent++;
2949 ERROR ("network plugin: Unable to append to the "
2950 "buffer for some weird reason");
2952 else if ((network_config_packet_size - send_buffer_fill) < 15)
2957 pthread_mutex_unlock (&send_buffer_lock);
2959 return ((status < 0) ? -1 : 0);
2960 } /* int network_write */
2962 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2966 if (cf_util_get_int (ci, &tmp) != 0)
2968 else if ((tmp > 0) && (tmp <= 255))
2969 network_config_ttl = tmp;
2971 WARNING ("network plugin: The `TimeToLive' must be between 1 and 255.");
2976 } /* }}} int network_config_set_ttl */
2978 static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
2983 if (cf_util_get_string_buffer (ci, if_name, sizeof (if_name)) != 0)
2986 *interface = if_nametoindex (if_name);
2988 } /* }}} int network_config_set_interface */
2990 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
2994 if (cf_util_get_int (ci, &tmp) != 0)
2996 else if ((tmp >= 1024) && (tmp <= 65535))
2997 network_config_packet_size = tmp;
2999 WARNING ("network plugin: The `MaxPacketSize' must be between 1024 and 65535.");
3004 } /* }}} int network_config_set_buffer_size */
3007 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
3011 if ((ci->values_num != 1)
3012 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3014 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
3015 "one string argument.");
3019 str = ci->values[0].value.string;
3020 if (strcasecmp ("Encrypt", str) == 0)
3021 *retval = SECURITY_LEVEL_ENCRYPT;
3022 else if (strcasecmp ("Sign", str) == 0)
3023 *retval = SECURITY_LEVEL_SIGN;
3024 else if (strcasecmp ("None", str) == 0)
3025 *retval = SECURITY_LEVEL_NONE;
3028 WARNING ("network plugin: Unknown security level: %s.", str);
3033 } /* }}} int network_config_set_security_level */
3034 #endif /* HAVE_LIBGCRYPT */
3036 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 (int 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) /* {{{ */
3126 if ((ci->values_num < 1) || (ci->values_num > 2)
3127 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3128 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3130 ERROR ("network plugin: The `%s' config option needs "
3131 "one or two string arguments.", ci->key);
3135 se = sockent_create (SOCKENT_TYPE_CLIENT);
3138 ERROR ("network plugin: sockent_create failed.");
3142 se->node = strdup (ci->values[0].value.string);
3143 if (ci->values_num >= 2)
3144 se->service = strdup (ci->values[1].value.string);
3146 for (int i = 0; i < ci->children_num; i++)
3148 oconfig_item_t *child = ci->children + i;
3151 if (strcasecmp ("Username", child->key) == 0)
3152 cf_util_get_string (child, &se->data.client.username);
3153 else if (strcasecmp ("Password", child->key) == 0)
3154 cf_util_get_string (child, &se->data.client.password);
3155 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3156 network_config_set_security_level (child,
3157 &se->data.client.security_level);
3159 #endif /* HAVE_LIBGCRYPT */
3160 if (strcasecmp ("Interface", child->key) == 0)
3161 network_config_set_interface (child, &se->interface);
3162 else if (strcasecmp ("ResolveInterval", child->key) == 0)
3163 cf_util_get_cdtime(child, &se->data.client.resolve_interval);
3166 WARNING ("network plugin: Option `%s' is not allowed here.",
3172 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
3173 && ((se->data.client.username == NULL)
3174 || (se->data.client.password == NULL)))
3176 ERROR ("network plugin: A security level higher than `none' was "
3177 "requested, but no Username or Password option was given. "
3178 "Cowardly refusing to open this socket!");
3179 sockent_destroy (se);
3182 #endif /* HAVE_LIBGCRYPT */
3184 status = sockent_init_crypto (se);
3187 ERROR ("network plugin: network_config_add_server: sockent_init_crypto() failed.");
3188 sockent_destroy (se);
3192 /* No call to sockent_client_connect() here -- it is called from
3193 * network_send_buffer_plain(). */
3195 status = sockent_add (se);
3198 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
3199 sockent_destroy (se);
3204 } /* }}} int network_config_add_server */
3206 static int network_config (oconfig_item_t *ci) /* {{{ */
3208 /* The options need to be applied first */
3209 for (int i = 0; i < ci->children_num; i++)
3211 oconfig_item_t *child = ci->children + i;
3212 if (strcasecmp ("TimeToLive", child->key) == 0)
3213 network_config_set_ttl (child);
3216 for (int i = 0; i < ci->children_num; i++)
3218 oconfig_item_t *child = ci->children + i;
3220 if (strcasecmp ("Listen", child->key) == 0)
3221 network_config_add_listen (child);
3222 else if (strcasecmp ("Server", child->key) == 0)
3223 network_config_add_server (child);
3224 else if (strcasecmp ("TimeToLive", child->key) == 0) {
3225 /* Handled earlier */
3227 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
3228 network_config_set_buffer_size (child);
3229 else if (strcasecmp ("Forward", child->key) == 0)
3230 cf_util_get_boolean (child, &network_config_forward);
3231 else if (strcasecmp ("ReportStats", child->key) == 0)
3232 cf_util_get_boolean (child, &network_config_stats);
3235 WARNING ("network plugin: Option `%s' is not allowed here.",
3241 } /* }}} int network_config */
3243 static int network_notification (const notification_t *n,
3244 user_data_t __attribute__((unused)) *user_data)
3246 char buffer[network_config_packet_size];
3247 char *buffer_ptr = buffer;
3248 size_t buffer_free = sizeof (buffer);
3251 if (!check_send_notify_okay (n))
3254 memset (buffer, 0, sizeof (buffer));
3256 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME_HR,
3257 (uint64_t) n->time);
3261 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
3262 (uint64_t) n->severity);
3266 if (strlen (n->host) > 0)
3268 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
3269 n->host, strlen (n->host));
3274 if (strlen (n->plugin) > 0)
3276 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
3277 n->plugin, strlen (n->plugin));
3282 if (strlen (n->plugin_instance) > 0)
3284 status = write_part_string (&buffer_ptr, &buffer_free,
3285 TYPE_PLUGIN_INSTANCE,
3286 n->plugin_instance, strlen (n->plugin_instance));
3291 if (strlen (n->type) > 0)
3293 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3294 n->type, strlen (n->type));
3299 if (strlen (n->type_instance) > 0)
3301 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3302 n->type_instance, strlen (n->type_instance));
3307 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3308 n->message, strlen (n->message));
3312 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3315 } /* int network_notification */
3317 static int network_shutdown (void)
3321 /* Kill the listening thread */
3322 if (receive_thread_running != 0)
3324 INFO ("network plugin: Stopping receive thread.");
3325 pthread_kill (receive_thread_id, SIGTERM);
3326 pthread_join (receive_thread_id, NULL /* no return value */);
3327 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3328 receive_thread_running = 0;
3331 /* Shutdown the dispatching thread */
3332 if (dispatch_thread_running != 0)
3334 INFO ("network plugin: Stopping dispatch thread.");
3335 pthread_mutex_lock (&receive_list_lock);
3336 pthread_cond_broadcast (&receive_list_cond);
3337 pthread_mutex_unlock (&receive_list_lock);
3338 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3339 dispatch_thread_running = 0;
3342 sockent_destroy (listen_sockets);
3344 if (send_buffer_fill > 0)
3347 sfree (send_buffer);
3349 for (sockent_t *se = sending_sockets; se != NULL; se = se->next)
3350 sockent_client_disconnect (se);
3351 sockent_destroy (sending_sockets);
3353 plugin_unregister_config ("network");
3354 plugin_unregister_init ("network");
3355 plugin_unregister_write ("network");
3356 plugin_unregister_shutdown ("network");
3359 } /* int network_shutdown */
3361 static int network_stats_read (void) /* {{{ */
3363 derive_t copy_octets_rx;
3364 derive_t copy_octets_tx;
3365 derive_t copy_packets_rx;
3366 derive_t copy_packets_tx;
3367 derive_t copy_values_dispatched;
3368 derive_t copy_values_not_dispatched;
3369 derive_t copy_values_sent;
3370 derive_t copy_values_not_sent;
3371 derive_t copy_receive_list_length;
3372 value_list_t vl = VALUE_LIST_INIT;
3375 copy_octets_rx = stats_octets_rx;
3376 copy_octets_tx = stats_octets_tx;
3377 copy_packets_rx = stats_packets_rx;
3378 copy_packets_tx = stats_packets_tx;
3379 copy_values_dispatched = stats_values_dispatched;
3380 copy_values_not_dispatched = stats_values_not_dispatched;
3381 copy_values_sent = stats_values_sent;
3382 copy_values_not_sent = stats_values_not_sent;
3383 copy_receive_list_length = receive_list_length;
3385 /* Initialize `vl' */
3389 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3390 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3392 /* Octets received / sent */
3393 vl.values[0].derive = (derive_t) copy_octets_rx;
3394 vl.values[1].derive = (derive_t) copy_octets_tx;
3395 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3396 plugin_dispatch_values (&vl);
3398 /* Packets received / send */
3399 vl.values[0].derive = (derive_t) copy_packets_rx;
3400 vl.values[1].derive = (derive_t) copy_packets_tx;
3401 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3402 plugin_dispatch_values (&vl);
3404 /* Values (not) dispatched and (not) send */
3405 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3408 vl.values[0].derive = (derive_t) copy_values_dispatched;
3409 sstrncpy (vl.type_instance, "dispatch-accepted",
3410 sizeof (vl.type_instance));
3411 plugin_dispatch_values (&vl);
3413 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3414 sstrncpy (vl.type_instance, "dispatch-rejected",
3415 sizeof (vl.type_instance));
3416 plugin_dispatch_values (&vl);
3418 vl.values[0].derive = (derive_t) copy_values_sent;
3419 sstrncpy (vl.type_instance, "send-accepted",
3420 sizeof (vl.type_instance));
3421 plugin_dispatch_values (&vl);
3423 vl.values[0].derive = (derive_t) copy_values_not_sent;
3424 sstrncpy (vl.type_instance, "send-rejected",
3425 sizeof (vl.type_instance));
3426 plugin_dispatch_values (&vl);
3428 /* Receive queue length */
3429 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3430 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3431 vl.type_instance[0] = 0;
3432 plugin_dispatch_values (&vl);
3435 } /* }}} int network_stats_read */
3437 static int network_init (void)
3439 static _Bool have_init = 0;
3441 /* Check if we were already initialized. If so, just return - there's
3442 * nothing more to do (for now, that is). */
3447 if (network_config_stats)
3448 plugin_register_read ("network", network_stats_read);
3450 plugin_register_shutdown ("network", network_shutdown);
3452 send_buffer = malloc (network_config_packet_size);
3453 if (send_buffer == NULL)
3455 ERROR ("network plugin: malloc failed.");
3458 network_init_buffer ();
3460 /* setup socket(s) and so on */
3461 if (sending_sockets != NULL)
3463 plugin_register_write ("network", network_write,
3464 /* user_data = */ NULL);
3465 plugin_register_notification ("network", network_notification,
3466 /* user_data = */ NULL);
3469 /* If no threads need to be started, return here. */
3470 if ((listen_sockets_num == 0)
3471 || ((dispatch_thread_running != 0)
3472 && (receive_thread_running != 0)))
3475 if (dispatch_thread_running == 0)
3478 status = plugin_thread_create (&dispatch_thread_id,
3479 NULL /* no attributes */,
3481 NULL /* no argument */);
3485 ERROR ("network: pthread_create failed: %s",
3486 sstrerror (errno, errbuf,
3491 dispatch_thread_running = 1;
3495 if (receive_thread_running == 0)
3498 status = plugin_thread_create (&receive_thread_id,
3499 NULL /* no attributes */,
3501 NULL /* no argument */);
3505 ERROR ("network: pthread_create failed: %s",
3506 sstrerror (errno, errbuf,
3511 receive_thread_running = 1;
3516 } /* int network_init */
3519 * The flush option of the network plugin cannot flush individual identifiers.
3520 * All the values are added to a buffer and sent when the buffer is full, the
3521 * requested value may or may not be in there, it's not worth finding out. We
3522 * just send the buffer if `flush' is called - if the requested value was in
3523 * there, good. If not, well, then there is nothing to flush.. -octo
3525 static int network_flush (cdtime_t timeout,
3526 __attribute__((unused)) const char *identifier,
3527 __attribute__((unused)) user_data_t *user_data)
3529 pthread_mutex_lock (&send_buffer_lock);
3531 if (send_buffer_fill > 0)
3535 cdtime_t now = cdtime ();
3536 if ((send_buffer_last_update + timeout) > now)
3538 pthread_mutex_unlock (&send_buffer_lock);
3544 pthread_mutex_unlock (&send_buffer_lock);
3547 } /* int network_flush */
3549 void module_register (void)
3551 plugin_register_complex_config ("network", network_config);
3552 plugin_register_init ("network", network_init);
3553 plugin_register_flush ("network", network_flush,
3554 /* user_data = */ NULL);
3555 } /* void module_register */
3557 /* vim: set fdm=marker : */