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 _BSD_SOURCE /* For struct ip_mreq */
30 #include "configfile.h"
31 #include "utils_fbhash.h"
32 #include "utils_avltree.h"
33 #include "utils_cache.h"
34 #include "utils_complain.h"
42 # include <sys/socket.h>
48 # include <netinet/in.h>
51 # include <arpa/inet.h>
62 # if defined __APPLE__
63 /* default xcode compiler throws warnings even when deprecated functionality
64 * is not used. -Werror breaks the build because of erroneous warnings.
65 * http://stackoverflow.com/questions/10556299/compiler-warnings-with-libgcrypt-v1-5-0/12830209#12830209
67 # pragma GCC diagnostic ignored "-Wdeprecated-declarations"
69 /* FreeBSD's copy of libgcrypt extends the existing GCRYPT_NO_DEPRECATED
70 * to properly hide all deprecated functionality.
71 * http://svnweb.freebsd.org/ports/head/security/libgcrypt/files/patch-src__gcrypt.h.in
73 # define GCRYPT_NO_DEPRECATED
75 # if defined __APPLE__
76 /* Re enable deprecation warnings */
77 # pragma GCC diagnostic warning "-Wdeprecated-declarations"
79 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 int network_config_forward = 0;
284 static int 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 value_list_t send_buffer_vl = VALUE_LIST_STATIC;
311 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
313 /* XXX: These counters are incremented from one place only. The spot in which
314 * the values are incremented is either only reachable by one thread (the
315 * dispatch thread, for example) or locked by some lock (send_buffer_lock for
316 * example). Only if neither is true, the stats_lock is acquired. The counters
317 * are always read without holding a lock in the hope that writing 8 bytes to
318 * memory is an atomic operation. */
319 static derive_t stats_octets_rx = 0;
320 static derive_t stats_octets_tx = 0;
321 static derive_t stats_packets_rx = 0;
322 static derive_t stats_packets_tx = 0;
323 static derive_t stats_values_dispatched = 0;
324 static derive_t stats_values_not_dispatched = 0;
325 static derive_t stats_values_sent = 0;
326 static derive_t stats_values_not_sent = 0;
327 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
332 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
334 uint64_t time_sent = 0;
337 status = uc_meta_data_get_unsigned_int (vl,
338 "network:time_sent", &time_sent);
340 /* This is a value we already sent. Don't allow it to be received again in
341 * order to avoid looping. */
342 if ((status == 0) && (time_sent >= ((uint64_t) vl->time)))
346 } /* }}} _Bool check_receive_okay */
348 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
353 if (network_config_forward != 0)
356 if (vl->meta == NULL)
359 status = meta_data_get_boolean (vl->meta, "network:received", &received);
360 if (status == -ENOENT)
362 else if (status != 0)
364 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
365 "with status %i.", status);
369 /* By default, only *send* value lists that were not *received* by the
372 } /* }}} _Bool check_send_okay */
374 static _Bool check_notify_received (const notification_t *n) /* {{{ */
376 notification_meta_t *ptr;
378 for (ptr = n->meta; ptr != NULL; ptr = ptr->next)
379 if ((strcmp ("network:received", ptr->name) == 0)
380 && (ptr->type == NM_TYPE_BOOLEAN))
381 return ((_Bool) ptr->nm_value.nm_boolean);
384 } /* }}} _Bool check_notify_received */
386 static _Bool check_send_notify_okay (const notification_t *n) /* {{{ */
388 static c_complain_t complain_forwarding = C_COMPLAIN_INIT_STATIC;
394 received = check_notify_received (n);
396 if (network_config_forward && received)
398 c_complain_once (LOG_ERR, &complain_forwarding,
399 "network plugin: A notification has been received via the network "
400 "and forwarding is enabled. Forwarding of notifications is currently "
401 "not supported, because there is not loop-deteciton available. "
402 "Please contact the collectd mailing list if you need this "
406 /* By default, only *send* value lists that were not *received* by the
409 } /* }}} _Bool check_send_notify_okay */
411 static int network_dispatch_values (value_list_t *vl, /* {{{ */
412 const char *username)
417 || (strlen (vl->host) <= 0)
418 || (strlen (vl->plugin) <= 0)
419 || (strlen (vl->type) <= 0))
422 if (!check_receive_okay (vl))
425 char name[6*DATA_MAX_NAME_LEN];
426 FORMAT_VL (name, sizeof (name), vl);
427 name[sizeof (name) - 1] = 0;
428 DEBUG ("network plugin: network_dispatch_values: "
429 "NOT dispatching %s.", name);
431 stats_values_not_dispatched++;
435 assert (vl->meta == NULL);
437 vl->meta = meta_data_create ();
438 if (vl->meta == NULL)
440 ERROR ("network plugin: meta_data_create failed.");
444 status = meta_data_add_boolean (vl->meta, "network:received", 1);
447 ERROR ("network plugin: meta_data_add_boolean failed.");
448 meta_data_destroy (vl->meta);
453 if (username != NULL)
455 status = meta_data_add_string (vl->meta, "network:username", username);
458 ERROR ("network plugin: meta_data_add_string failed.");
459 meta_data_destroy (vl->meta);
465 plugin_dispatch_values (vl);
466 stats_values_dispatched++;
468 meta_data_destroy (vl->meta);
472 } /* }}} int network_dispatch_values */
474 static int network_dispatch_notification (notification_t *n) /* {{{ */
478 assert (n->meta == NULL);
480 status = plugin_notification_meta_add_boolean (n, "network:received", 1);
483 ERROR ("network plugin: plugin_notification_meta_add_boolean failed.");
484 plugin_notification_meta_free (n->meta);
489 status = plugin_dispatch_notification (n);
491 plugin_notification_meta_free (n->meta);
495 } /* }}} int network_dispatch_notification */
498 static void network_init_gcrypt (void) /* {{{ */
500 /* http://lists.gnupg.org/pipermail/gcrypt-devel/2003-August/000458.html
501 * Because you can't know in a library whether another library has
502 * already initialized the library */
503 if (gcry_control (GCRYCTL_ANY_INITIALIZATION_P))
506 /* http://www.gnupg.org/documentation/manuals/gcrypt/Multi_002dThreading.html
507 * To ensure thread-safety, it's important to set GCRYCTL_SET_THREAD_CBS
508 * *before* initalizing Libgcrypt with gcry_check_version(), which itself must
509 * be called before any other gcry_* function. GCRYCTL_ANY_INITIALIZATION_P
510 * above doesn't count, as it doesn't implicitly initalize Libgcrypt.
512 * tl;dr: keep all these gry_* statements in this exact order please. */
513 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
514 gcry_check_version (NULL);
515 gcry_control (GCRYCTL_INIT_SECMEM, 32768);
516 gcry_control (GCRYCTL_INITIALIZATION_FINISHED);
517 } /* }}} void network_init_gcrypt */
519 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
520 const void *iv, size_t iv_size, const char *username)
523 gcry_cipher_hd_t *cyper_ptr;
524 unsigned char password_hash[32];
526 if (se->type == SOCKENT_TYPE_CLIENT)
528 cyper_ptr = &se->data.client.cypher;
529 memcpy (password_hash, se->data.client.password_hash,
530 sizeof (password_hash));
536 cyper_ptr = &se->data.server.cypher;
538 if (username == NULL)
541 secret = fbh_get (se->data.server.userdb, username);
545 gcry_md_hash_buffer (GCRY_MD_SHA256,
547 secret, strlen (secret));
552 if (*cyper_ptr == NULL)
554 err = gcry_cipher_open (cyper_ptr,
555 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
558 ERROR ("network plugin: gcry_cipher_open returned: %s",
559 gcry_strerror (err));
566 gcry_cipher_reset (*cyper_ptr);
568 assert (*cyper_ptr != NULL);
570 err = gcry_cipher_setkey (*cyper_ptr,
571 password_hash, sizeof (password_hash));
574 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
575 gcry_strerror (err));
576 gcry_cipher_close (*cyper_ptr);
581 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
584 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
585 gcry_strerror (err));
586 gcry_cipher_close (*cyper_ptr);
592 } /* }}} int network_get_aes256_cypher */
593 #endif /* HAVE_LIBGCRYPT */
595 static int write_part_values (char **ret_buffer, int *ret_buffer_len,
596 const data_set_t *ds, const value_list_t *vl)
602 part_header_t pkg_ph;
603 uint16_t pkg_num_values;
604 uint8_t *pkg_values_types;
610 num_values = vl->values_len;
611 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
612 + (num_values * sizeof (uint8_t))
613 + (num_values * sizeof (value_t));
615 if (*ret_buffer_len < packet_len)
618 pkg_values_types = (uint8_t *) malloc (num_values * sizeof (uint8_t));
619 if (pkg_values_types == NULL)
621 ERROR ("network plugin: write_part_values: malloc failed.");
625 pkg_values = (value_t *) malloc (num_values * sizeof (value_t));
626 if (pkg_values == NULL)
628 free (pkg_values_types);
629 ERROR ("network plugin: write_part_values: malloc failed.");
633 pkg_ph.type = htons (TYPE_VALUES);
634 pkg_ph.length = htons (packet_len);
636 pkg_num_values = htons ((uint16_t) vl->values_len);
638 for (i = 0; i < num_values; i++)
640 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
641 switch (ds->ds[i].type)
643 case DS_TYPE_COUNTER:
644 pkg_values[i].counter = htonll (vl->values[i].counter);
648 pkg_values[i].gauge = htond (vl->values[i].gauge);
652 pkg_values[i].derive = htonll (vl->values[i].derive);
655 case DS_TYPE_ABSOLUTE:
656 pkg_values[i].absolute = htonll (vl->values[i].absolute);
660 free (pkg_values_types);
662 ERROR ("network plugin: write_part_values: "
663 "Unknown data source type: %i",
666 } /* switch (ds->ds[i].type) */
667 } /* for (num_values) */
670 * Use `memcpy' to write everything to the buffer, because the pointer
671 * may be unaligned and some architectures, such as SPARC, can't handle
674 packet_ptr = *ret_buffer;
676 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
677 offset += sizeof (pkg_ph);
678 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
679 offset += sizeof (pkg_num_values);
680 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
681 offset += num_values * sizeof (uint8_t);
682 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
683 offset += num_values * sizeof (value_t);
685 assert (offset == packet_len);
687 *ret_buffer = packet_ptr + packet_len;
688 *ret_buffer_len -= packet_len;
690 free (pkg_values_types);
694 } /* int write_part_values */
696 static int write_part_number (char **ret_buffer, int *ret_buffer_len,
697 int type, uint64_t value)
702 part_header_t pkg_head;
707 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
709 if (*ret_buffer_len < packet_len)
712 pkg_head.type = htons (type);
713 pkg_head.length = htons (packet_len);
714 pkg_value = htonll (value);
716 packet_ptr = *ret_buffer;
718 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
719 offset += sizeof (pkg_head);
720 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
721 offset += sizeof (pkg_value);
723 assert (offset == packet_len);
725 *ret_buffer = packet_ptr + packet_len;
726 *ret_buffer_len -= packet_len;
729 } /* int write_part_number */
731 static int write_part_string (char **ret_buffer, int *ret_buffer_len,
732 int type, const char *str, int str_len)
742 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
743 if (*ret_buffer_len < buffer_len)
746 pkg_type = htons (type);
747 pkg_length = htons (buffer_len);
749 buffer = *ret_buffer;
751 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
752 offset += sizeof (pkg_type);
753 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
754 offset += sizeof (pkg_length);
755 memcpy (buffer + offset, str, str_len);
757 memset (buffer + offset, '\0', 1);
760 assert (offset == buffer_len);
762 *ret_buffer = buffer + buffer_len;
763 *ret_buffer_len -= buffer_len;
766 } /* int write_part_string */
768 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
769 value_t **ret_values, int *ret_num_values)
771 char *buffer = *ret_buffer;
772 size_t buffer_len = *ret_buffer_len;
787 NOTICE ("network plugin: packet is too short: "
788 "buffer_len = %zu", buffer_len);
792 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
793 buffer += sizeof (tmp16);
794 pkg_type = ntohs (tmp16);
796 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
797 buffer += sizeof (tmp16);
798 pkg_length = ntohs (tmp16);
800 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
801 buffer += sizeof (tmp16);
802 pkg_numval = ntohs (tmp16);
804 assert (pkg_type == TYPE_VALUES);
806 exp_size = 3 * sizeof (uint16_t)
807 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
808 if (buffer_len < exp_size)
810 WARNING ("network plugin: parse_part_values: "
812 "Chunk of size %zu expected, "
813 "but buffer has only %zu bytes left.",
814 exp_size, buffer_len);
818 if (pkg_length != exp_size)
820 WARNING ("network plugin: parse_part_values: "
821 "Length and number of values "
822 "in the packet don't match.");
826 pkg_types = (uint8_t *) malloc (pkg_numval * sizeof (uint8_t));
827 pkg_values = (value_t *) malloc (pkg_numval * sizeof (value_t));
828 if ((pkg_types == NULL) || (pkg_values == NULL))
832 ERROR ("network plugin: parse_part_values: malloc failed.");
836 memcpy ((void *) pkg_types, (void *) buffer, pkg_numval * sizeof (uint8_t));
837 buffer += pkg_numval * sizeof (uint8_t);
838 memcpy ((void *) pkg_values, (void *) buffer, pkg_numval * sizeof (value_t));
839 buffer += pkg_numval * sizeof (value_t);
841 for (i = 0; i < pkg_numval; i++)
843 switch (pkg_types[i])
845 case DS_TYPE_COUNTER:
846 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
850 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
854 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
857 case DS_TYPE_ABSOLUTE:
858 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
862 NOTICE ("network plugin: parse_part_values: "
863 "Don't know how to handle data source type %"PRIu8,
868 } /* switch (pkg_types[i]) */
871 *ret_buffer = buffer;
872 *ret_buffer_len = buffer_len - pkg_length;
873 *ret_num_values = pkg_numval;
874 *ret_values = pkg_values;
879 } /* int parse_part_values */
881 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
884 char *buffer = *ret_buffer;
885 size_t buffer_len = *ret_buffer_len;
889 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
893 if (buffer_len < exp_size)
895 WARNING ("network plugin: parse_part_number: "
897 "Chunk of size %zu expected, "
898 "but buffer has only %zu bytes left.",
899 exp_size, buffer_len);
903 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
904 buffer += sizeof (tmp16);
905 /* pkg_type = ntohs (tmp16); */
907 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
908 buffer += sizeof (tmp16);
909 pkg_length = ntohs (tmp16);
911 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
912 buffer += sizeof (tmp64);
913 *value = ntohll (tmp64);
915 *ret_buffer = buffer;
916 *ret_buffer_len = buffer_len - pkg_length;
919 } /* int parse_part_number */
921 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
922 char *output, size_t const output_len)
924 char *buffer = *ret_buffer;
925 size_t buffer_len = *ret_buffer_len;
928 size_t const header_size = 2 * sizeof (uint16_t);
936 if (buffer_len < header_size)
938 WARNING ("network plugin: parse_part_string: "
940 "Chunk of at least size %zu expected, "
941 "but buffer has only %zu bytes left.",
942 header_size, buffer_len);
946 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
947 buffer += sizeof (tmp16);
948 /* pkg_type = ntohs (tmp16); */
950 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
951 buffer += sizeof (tmp16);
952 pkg_length = ntohs (tmp16);
953 payload_size = ((size_t) pkg_length) - header_size;
955 /* Check that packet fits in the input buffer */
956 if (pkg_length > buffer_len)
958 WARNING ("network plugin: parse_part_string: "
960 "Chunk of size %"PRIu16" received, "
961 "but buffer has only %zu bytes left.",
962 pkg_length, buffer_len);
966 /* Check that pkg_length is in the valid range */
967 if (pkg_length <= header_size)
969 WARNING ("network plugin: parse_part_string: "
971 "Header claims this packet is only %hu "
972 "bytes long.", pkg_length);
976 /* Check that the package data fits into the output buffer.
977 * The previous if-statement ensures that:
978 * `pkg_length > header_size' */
979 if (output_len < payload_size)
981 WARNING ("network plugin: parse_part_string: "
983 "Output buffer holds %zu bytes, "
984 "which is too small to hold the received "
986 output_len, payload_size);
990 /* All sanity checks successfull, let's copy the data over */
991 memcpy ((void *) output, (void *) buffer, payload_size);
992 buffer += payload_size;
994 /* For some very weird reason '\0' doesn't do the trick on SPARC in
996 if (output[payload_size - 1] != 0)
998 WARNING ("network plugin: parse_part_string: "
999 "Received string does not end "
1000 "with a NULL-byte.");
1004 *ret_buffer = buffer;
1005 *ret_buffer_len = buffer_len - pkg_length;
1008 } /* int parse_part_string */
1010 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
1011 * parse_packet and vice versa. */
1012 #define PP_SIGNED 0x01
1013 #define PP_ENCRYPTED 0x02
1014 static int parse_packet (sockent_t *se,
1015 void *buffer, size_t buffer_size, int flags,
1016 const char *username);
1018 #define BUFFER_READ(p,s) do { \
1019 memcpy ((p), buffer + buffer_offset, (s)); \
1020 buffer_offset += (s); \
1024 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1025 void **ret_buffer, size_t *ret_buffer_len, int flags)
1027 static c_complain_t complain_no_users = C_COMPLAIN_INIT_STATIC;
1031 size_t buffer_offset;
1033 size_t username_len;
1036 part_signature_sha256_t pss;
1037 uint16_t pss_head_length;
1038 char hash[sizeof (pss.hash)];
1042 unsigned char *hash_ptr;
1044 buffer = *ret_buffer;
1045 buffer_len = *ret_buffer_len;
1048 if (se->data.server.userdb == NULL)
1050 c_complain (LOG_NOTICE, &complain_no_users,
1051 "network plugin: Received signed network packet but can't verify it "
1052 "because no user DB has been configured. Will accept it.");
1056 /* Check if the buffer has enough data for this structure. */
1057 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
1060 /* Read type and length header */
1061 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1062 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1063 pss_head_length = ntohs (pss.head.length);
1065 /* Check if the `pss_head_length' is within bounds. */
1066 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
1067 || (pss_head_length > buffer_len))
1069 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
1073 /* Copy the hash. */
1074 BUFFER_READ (pss.hash, sizeof (pss.hash));
1076 /* Calculate username length (without null byte) and allocate memory */
1077 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
1078 pss.username = malloc (username_len + 1);
1079 if (pss.username == NULL)
1082 /* Read the username */
1083 BUFFER_READ (pss.username, username_len);
1084 pss.username[username_len] = 0;
1086 assert (buffer_offset == pss_head_length);
1088 /* Query the password */
1089 secret = fbh_get (se->data.server.userdb, pss.username);
1092 ERROR ("network plugin: Unknown user: %s", pss.username);
1093 sfree (pss.username);
1097 /* Create a hash device and check the HMAC */
1099 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
1102 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
1103 gcry_strerror (err));
1105 sfree (pss.username);
1109 err = gcry_md_setkey (hd, secret, strlen (secret));
1112 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
1115 sfree (pss.username);
1120 buffer + PART_SIGNATURE_SHA256_SIZE,
1121 buffer_len - PART_SIGNATURE_SHA256_SIZE);
1122 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
1123 if (hash_ptr == NULL)
1125 ERROR ("network plugin: gcry_md_read failed.");
1128 sfree (pss.username);
1131 memcpy (hash, hash_ptr, sizeof (hash));
1137 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1139 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1144 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1145 flags | PP_SIGNED, pss.username);
1149 sfree (pss.username);
1151 *ret_buffer = buffer + buffer_len;
1152 *ret_buffer_len = 0;
1155 } /* }}} int parse_part_sign_sha256 */
1156 /* #endif HAVE_LIBGCRYPT */
1158 #else /* if !HAVE_LIBGCRYPT */
1159 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1160 void **ret_buffer, size_t *ret_buffer_size, int flags)
1162 static int warning_has_been_printed = 0;
1166 size_t buffer_offset;
1169 part_signature_sha256_t pss;
1171 buffer = *ret_buffer;
1172 buffer_size = *ret_buffer_size;
1175 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1178 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1179 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1180 part_len = ntohs (pss.head.length);
1182 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1183 || (part_len > buffer_size))
1186 if (warning_has_been_printed == 0)
1188 WARNING ("network plugin: Received signed packet, but the network "
1189 "plugin was not linked with libgcrypt, so I cannot "
1190 "verify the signature. The packet will be accepted.");
1191 warning_has_been_printed = 1;
1194 parse_packet (se, buffer + part_len, buffer_size - part_len, flags,
1195 /* username = */ NULL);
1197 *ret_buffer = buffer + buffer_size;
1198 *ret_buffer_size = 0;
1201 } /* }}} int parse_part_sign_sha256 */
1202 #endif /* !HAVE_LIBGCRYPT */
1205 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1206 void **ret_buffer, size_t *ret_buffer_len,
1209 char *buffer = *ret_buffer;
1210 size_t buffer_len = *ret_buffer_len;
1213 size_t buffer_offset;
1214 uint16_t username_len;
1215 part_encryption_aes256_t pea;
1216 unsigned char hash[sizeof (pea.hash)];
1218 gcry_cipher_hd_t cypher;
1221 /* Make sure at least the header if available. */
1222 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1224 NOTICE ("network plugin: parse_part_encr_aes256: "
1225 "Discarding short packet.");
1231 /* Copy the unencrypted information into `pea'. */
1232 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1233 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1235 /* Check the `part size'. */
1236 part_size = ntohs (pea.head.length);
1237 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1238 || (part_size > buffer_len))
1240 NOTICE ("network plugin: parse_part_encr_aes256: "
1241 "Discarding part with invalid size.");
1245 /* Read the username */
1246 BUFFER_READ (&username_len, sizeof (username_len));
1247 username_len = ntohs (username_len);
1249 if ((username_len <= 0)
1250 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1252 NOTICE ("network plugin: parse_part_encr_aes256: "
1253 "Discarding part with invalid username length.");
1257 assert (username_len > 0);
1258 pea.username = malloc (username_len + 1);
1259 if (pea.username == NULL)
1261 BUFFER_READ (pea.username, username_len);
1262 pea.username[username_len] = 0;
1264 /* Last but not least, the initialization vector */
1265 BUFFER_READ (pea.iv, sizeof (pea.iv));
1267 /* Make sure we are at the right position */
1268 assert (buffer_offset == (username_len +
1269 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1271 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1275 sfree (pea.username);
1279 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1280 assert (payload_len > 0);
1282 /* Decrypt the packet in-place */
1283 err = gcry_cipher_decrypt (cypher,
1284 buffer + buffer_offset,
1285 part_size - buffer_offset,
1286 /* in = */ NULL, /* in len = */ 0);
1289 sfree (pea.username);
1290 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1291 gcry_strerror (err));
1296 BUFFER_READ (pea.hash, sizeof (pea.hash));
1298 /* Make sure we're at the right position - again */
1299 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1300 assert (buffer_offset == (part_size - payload_len));
1302 /* Check hash sum */
1303 memset (hash, 0, sizeof (hash));
1304 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1305 buffer + buffer_offset, payload_len);
1306 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1308 sfree (pea.username);
1309 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1313 parse_packet (se, buffer + buffer_offset, payload_len,
1314 flags | PP_ENCRYPTED, pea.username);
1316 /* XXX: Free pea.username?!? */
1318 /* Update return values */
1319 *ret_buffer = buffer + part_size;
1320 *ret_buffer_len = buffer_len - part_size;
1322 sfree (pea.username);
1325 } /* }}} int parse_part_encr_aes256 */
1326 /* #endif HAVE_LIBGCRYPT */
1328 #else /* if !HAVE_LIBGCRYPT */
1329 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1330 void **ret_buffer, size_t *ret_buffer_size, int flags)
1332 static int warning_has_been_printed = 0;
1336 size_t buffer_offset;
1341 buffer = *ret_buffer;
1342 buffer_size = *ret_buffer_size;
1345 /* parse_packet assures this minimum size. */
1346 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1348 BUFFER_READ (&ph.type, sizeof (ph.type));
1349 BUFFER_READ (&ph.length, sizeof (ph.length));
1350 ph_length = ntohs (ph.length);
1352 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1353 || (ph_length > buffer_size))
1355 ERROR ("network plugin: AES-256 encrypted part "
1356 "with invalid length received.");
1360 if (warning_has_been_printed == 0)
1362 WARNING ("network plugin: Received encrypted packet, but the network "
1363 "plugin was not linked with libgcrypt, so I cannot "
1364 "decrypt it. The part will be discarded.");
1365 warning_has_been_printed = 1;
1368 *ret_buffer += ph_length;
1369 *ret_buffer_size -= ph_length;
1372 } /* }}} int parse_part_encr_aes256 */
1373 #endif /* !HAVE_LIBGCRYPT */
1377 static int parse_packet (sockent_t *se, /* {{{ */
1378 void *buffer, size_t buffer_size, int flags,
1379 const char *username)
1383 value_list_t vl = VALUE_LIST_INIT;
1387 int packet_was_signed = (flags & PP_SIGNED);
1388 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1389 int printed_ignore_warning = 0;
1390 #endif /* HAVE_LIBGCRYPT */
1393 memset (&vl, '\0', sizeof (vl));
1394 memset (&n, '\0', sizeof (n));
1397 while ((status == 0) && (0 < buffer_size)
1398 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1400 uint16_t pkg_length;
1403 memcpy ((void *) &pkg_type,
1406 memcpy ((void *) &pkg_length,
1407 (void *) (buffer + sizeof (pkg_type)),
1408 sizeof (pkg_length));
1410 pkg_length = ntohs (pkg_length);
1411 pkg_type = ntohs (pkg_type);
1413 if (pkg_length > buffer_size)
1415 /* Ensure that this loop terminates eventually */
1416 if (pkg_length < (2 * sizeof (uint16_t)))
1419 if (pkg_type == TYPE_ENCR_AES256)
1421 status = parse_part_encr_aes256 (se,
1422 &buffer, &buffer_size, flags);
1425 ERROR ("network plugin: Decrypting AES256 "
1427 "with status %i.", status);
1432 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1433 && (packet_was_encrypted == 0))
1435 if (printed_ignore_warning == 0)
1437 INFO ("network plugin: Unencrypted packet or "
1438 "part has been ignored.");
1439 printed_ignore_warning = 1;
1441 buffer = ((char *) buffer) + pkg_length;
1444 #endif /* HAVE_LIBGCRYPT */
1445 else if (pkg_type == TYPE_SIGN_SHA256)
1447 status = parse_part_sign_sha256 (se,
1448 &buffer, &buffer_size, flags);
1451 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1453 "with status %i.", status);
1458 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1459 && (packet_was_encrypted == 0)
1460 && (packet_was_signed == 0))
1462 if (printed_ignore_warning == 0)
1464 INFO ("network plugin: Unsigned packet or "
1465 "part has been ignored.");
1466 printed_ignore_warning = 1;
1468 buffer = ((char *) buffer) + pkg_length;
1471 #endif /* HAVE_LIBGCRYPT */
1472 else if (pkg_type == TYPE_VALUES)
1474 status = parse_part_values (&buffer, &buffer_size,
1475 &vl.values, &vl.values_len);
1479 network_dispatch_values (&vl, username);
1483 else if (pkg_type == TYPE_TIME)
1486 status = parse_part_number (&buffer, &buffer_size,
1490 vl.time = TIME_T_TO_CDTIME_T (tmp);
1491 n.time = TIME_T_TO_CDTIME_T (tmp);
1494 else if (pkg_type == TYPE_TIME_HR)
1497 status = parse_part_number (&buffer, &buffer_size,
1501 vl.time = (cdtime_t) tmp;
1502 n.time = (cdtime_t) tmp;
1505 else if (pkg_type == TYPE_INTERVAL)
1508 status = parse_part_number (&buffer, &buffer_size,
1511 vl.interval = TIME_T_TO_CDTIME_T (tmp);
1513 else if (pkg_type == TYPE_INTERVAL_HR)
1516 status = parse_part_number (&buffer, &buffer_size,
1519 vl.interval = (cdtime_t) tmp;
1521 else if (pkg_type == TYPE_HOST)
1523 status = parse_part_string (&buffer, &buffer_size,
1524 vl.host, sizeof (vl.host));
1526 sstrncpy (n.host, vl.host, sizeof (n.host));
1528 else if (pkg_type == TYPE_PLUGIN)
1530 status = parse_part_string (&buffer, &buffer_size,
1531 vl.plugin, sizeof (vl.plugin));
1533 sstrncpy (n.plugin, vl.plugin,
1536 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1538 status = parse_part_string (&buffer, &buffer_size,
1540 sizeof (vl.plugin_instance));
1542 sstrncpy (n.plugin_instance,
1544 sizeof (n.plugin_instance));
1546 else if (pkg_type == TYPE_TYPE)
1548 status = parse_part_string (&buffer, &buffer_size,
1549 vl.type, sizeof (vl.type));
1551 sstrncpy (n.type, vl.type, sizeof (n.type));
1553 else if (pkg_type == TYPE_TYPE_INSTANCE)
1555 status = parse_part_string (&buffer, &buffer_size,
1557 sizeof (vl.type_instance));
1559 sstrncpy (n.type_instance, vl.type_instance,
1560 sizeof (n.type_instance));
1562 else if (pkg_type == TYPE_MESSAGE)
1564 status = parse_part_string (&buffer, &buffer_size,
1565 n.message, sizeof (n.message));
1571 else if ((n.severity != NOTIF_FAILURE)
1572 && (n.severity != NOTIF_WARNING)
1573 && (n.severity != NOTIF_OKAY))
1575 INFO ("network plugin: "
1576 "Ignoring notification with "
1577 "unknown severity %i.",
1580 else if (n.time <= 0)
1582 INFO ("network plugin: "
1583 "Ignoring notification with "
1586 else if (strlen (n.message) <= 0)
1588 INFO ("network plugin: "
1589 "Ignoring notification with "
1590 "an empty message.");
1594 network_dispatch_notification (&n);
1597 else if (pkg_type == TYPE_SEVERITY)
1600 status = parse_part_number (&buffer, &buffer_size,
1603 n.severity = (int) tmp;
1607 DEBUG ("network plugin: parse_packet: Unknown part"
1608 " type: 0x%04hx", pkg_type);
1609 buffer = ((char *) buffer) + pkg_length;
1611 } /* while (buffer_size > sizeof (part_header_t)) */
1613 if (status == 0 && buffer_size > 0)
1614 WARNING ("network plugin: parse_packet: Received truncated "
1615 "packet, try increasing `MaxPacketSize'");
1618 } /* }}} int parse_packet */
1620 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1629 sfree (sec->username);
1630 sfree (sec->password);
1631 if (sec->cypher != NULL)
1632 gcry_cipher_close (sec->cypher);
1634 } /* }}} void free_sockent_client */
1636 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1640 for (i = 0; i < ses->fd_num; i++)
1642 if (ses->fd[i] >= 0)
1651 sfree (ses->auth_file);
1652 fbh_destroy (ses->userdb);
1653 if (ses->cypher != NULL)
1654 gcry_cipher_close (ses->cypher);
1656 } /* }}} void free_sockent_server */
1658 static void sockent_destroy (sockent_t *se) /* {{{ */
1662 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1669 sfree (se->service);
1671 if (se->type == SOCKENT_TYPE_CLIENT)
1672 free_sockent_client (&se->data.client);
1674 free_sockent_server (&se->data.server);
1679 } /* }}} void sockent_destroy */
1682 * int network_set_ttl
1684 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1685 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1687 * The `struct addrinfo' is used to destinguish between unicast and multicast
1690 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1692 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1693 network_config_ttl);
1695 assert (se->type == SOCKENT_TYPE_CLIENT);
1697 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1700 if (ai->ai_family == AF_INET)
1702 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1705 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1706 optname = IP_MULTICAST_TTL;
1710 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1711 &network_config_ttl,
1712 sizeof (network_config_ttl)) != 0)
1715 ERROR ("network plugin: setsockopt (ipv4-ttl): %s",
1716 sstrerror (errno, errbuf, sizeof (errbuf)));
1720 else if (ai->ai_family == AF_INET6)
1722 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1723 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1726 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1727 optname = IPV6_MULTICAST_HOPS;
1729 optname = IPV6_UNICAST_HOPS;
1731 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1732 &network_config_ttl,
1733 sizeof (network_config_ttl)) != 0)
1736 ERROR ("network plugin: setsockopt(ipv6-ttl): %s",
1737 sstrerror (errno, errbuf,
1744 } /* int network_set_ttl */
1746 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1748 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1751 assert (se->type == SOCKENT_TYPE_CLIENT);
1753 if (ai->ai_family == AF_INET)
1755 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1757 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1759 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1760 /* If possible, use the "ip_mreqn" structure which has
1761 * an "interface index" member. Using the interface
1762 * index is preferred here, because of its similarity
1763 * to the way IPv6 handles this. Unfortunately, it
1764 * appears not to be portable. */
1765 struct ip_mreqn mreq;
1767 memset (&mreq, 0, sizeof (mreq));
1768 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1769 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1770 mreq.imr_ifindex = se->interface;
1772 struct ip_mreq mreq;
1774 memset (&mreq, 0, sizeof (mreq));
1775 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1776 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1779 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1780 &mreq, sizeof (mreq)) != 0)
1783 ERROR ("network plugin: setsockopt (ipv4-multicast-if): %s",
1784 sstrerror (errno, errbuf, sizeof (errbuf)));
1791 else if (ai->ai_family == AF_INET6)
1793 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1795 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1797 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1799 sizeof (se->interface)) != 0)
1802 ERROR ("network plugin: setsockopt (ipv6-multicast-if): %s",
1803 sstrerror (errno, errbuf,
1812 /* else: Not a multicast interface. */
1813 if (se->interface != 0)
1815 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1816 char interface_name[IFNAMSIZ];
1818 if (if_indextoname (se->interface, interface_name) == NULL)
1821 DEBUG ("network plugin: Binding socket to interface %s", interface_name);
1823 if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
1825 sizeof(interface_name)) == -1 )
1828 ERROR ("network plugin: setsockopt (bind-if): %s",
1829 sstrerror (errno, errbuf, sizeof (errbuf)));
1832 /* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1835 WARNING ("network plugin: Cannot set the interface on a unicast "
1837 # if !defined(SO_BINDTODEVICE)
1838 "the \"SO_BINDTODEVICE\" socket option "
1840 "the \"if_indextoname\" function "
1842 "is not available on your system.");
1848 } /* }}} network_set_interface */
1850 static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
1859 /* allow multiple sockets to use the same PORT number */
1860 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1861 &yes, sizeof(yes)) == -1) {
1863 ERROR ("network plugin: setsockopt (reuseaddr): %s",
1864 sstrerror (errno, errbuf, sizeof (errbuf)));
1868 DEBUG ("fd = %i; calling `bind'", fd);
1870 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1874 sstrerror (errno, errbuf, sizeof (errbuf)));
1878 if (ai->ai_family == AF_INET)
1880 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1881 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1883 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1884 struct ip_mreqn mreq;
1886 struct ip_mreq mreq;
1889 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1891 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1892 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1893 /* Set the interface using the interface index if
1894 * possible (available). Unfortunately, the struct
1895 * ip_mreqn is not portable. */
1896 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1897 mreq.imr_ifindex = interface_idx;
1899 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1902 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1903 &loop, sizeof (loop)) == -1)
1906 ERROR ("network plugin: setsockopt (multicast-loop): %s",
1907 sstrerror (errno, errbuf,
1912 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1913 &mreq, sizeof (mreq)) == -1)
1916 ERROR ("network plugin: setsockopt (add-membership): %s",
1917 sstrerror (errno, errbuf,
1925 else if (ai->ai_family == AF_INET6)
1927 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1928 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1929 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1931 struct ipv6_mreq mreq;
1933 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1935 memcpy (&mreq.ipv6mr_multiaddr,
1937 sizeof (addr->sin6_addr));
1939 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1940 * ipv6mr_interface may be set to zeroes to
1941 * choose the default multicast interface or to
1942 * the index of a particular multicast-capable
1943 * interface if the host is multihomed.
1944 * Membership is associ-associated with a
1945 * single interface; programs running on
1946 * multihomed hosts may need to join the same
1947 * group on more than one interface.*/
1948 mreq.ipv6mr_interface = interface_idx;
1950 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1951 &loop, sizeof (loop)) == -1)
1954 ERROR ("network plugin: setsockopt (ipv6-multicast-loop): %s",
1955 sstrerror (errno, errbuf,
1960 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1961 &mreq, sizeof (mreq)) == -1)
1964 ERROR ("network plugin: setsockopt (ipv6-add-membership): %s",
1965 sstrerror (errno, errbuf,
1974 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1975 /* if a specific interface was set, bind the socket to it. But to avoid
1976 * possible problems with multicast routing, only do that for non-multicast
1978 if (interface_idx != 0)
1980 char interface_name[IFNAMSIZ];
1982 if (if_indextoname (interface_idx, interface_name) == NULL)
1985 DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
1987 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
1989 sizeof(interface_name)) == -1 )
1992 ERROR ("network plugin: setsockopt (bind-if): %s",
1993 sstrerror (errno, errbuf, sizeof (errbuf)));
1997 #endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
2000 } /* int network_bind_socket */
2002 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
2003 * or `SOCKENT_TYPE_SERVER' */
2004 static sockent_t *sockent_create (int type) /* {{{ */
2008 if ((type != SOCKENT_TYPE_CLIENT) && (type != SOCKENT_TYPE_SERVER))
2011 se = malloc (sizeof (*se));
2014 memset (se, 0, sizeof (*se));
2022 if (type == SOCKENT_TYPE_SERVER)
2024 se->data.server.fd = NULL;
2026 se->data.server.security_level = SECURITY_LEVEL_NONE;
2027 se->data.server.auth_file = NULL;
2028 se->data.server.userdb = NULL;
2029 se->data.server.cypher = NULL;
2034 se->data.client.fd = -1;
2035 se->data.client.addr = NULL;
2036 se->data.client.resolve_interval = 0;
2037 se->data.client.next_resolve_reconnect = 0;
2039 se->data.client.security_level = SECURITY_LEVEL_NONE;
2040 se->data.client.username = NULL;
2041 se->data.client.password = NULL;
2042 se->data.client.cypher = NULL;
2047 } /* }}} sockent_t *sockent_create */
2049 static int sockent_init_crypto (sockent_t *se) /* {{{ */
2051 #if HAVE_LIBGCRYPT /* {{{ */
2052 if (se->type == SOCKENT_TYPE_CLIENT)
2054 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
2056 network_init_gcrypt ();
2058 if ((se->data.client.username == NULL)
2059 || (se->data.client.password == NULL))
2061 ERROR ("network plugin: Client socket with "
2062 "security requested, but no "
2063 "credentials are configured.");
2066 gcry_md_hash_buffer (GCRY_MD_SHA256,
2067 se->data.client.password_hash,
2068 se->data.client.password,
2069 strlen (se->data.client.password));
2072 else /* (se->type == SOCKENT_TYPE_SERVER) */
2074 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2076 network_init_gcrypt ();
2078 if (se->data.server.auth_file == NULL)
2080 ERROR ("network plugin: Server socket with "
2081 "security requested, but no "
2082 "password file is configured.");
2086 if (se->data.server.auth_file != NULL)
2088 se->data.server.userdb = fbh_create (se->data.server.auth_file);
2089 if (se->data.server.userdb == NULL)
2091 ERROR ("network plugin: Reading password file "
2093 se->data.server.auth_file);
2094 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2099 #endif /* }}} HAVE_LIBGCRYPT */
2102 } /* }}} int sockent_init_crypto */
2104 static int sockent_client_disconnect (sockent_t *se) /* {{{ */
2106 struct sockent_client *client;
2108 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2111 client = &se->data.client;
2112 if (client->fd >= 0) /* connected */
2118 sfree (client->addr);
2119 client->addrlen = 0;
2122 } /* }}} int sockent_client_disconnect */
2124 static int sockent_client_connect (sockent_t *se) /* {{{ */
2126 static c_complain_t complaint = C_COMPLAIN_INIT_STATIC;
2128 struct sockent_client *client;
2129 struct addrinfo ai_hints;
2130 struct addrinfo *ai_list = NULL, *ai_ptr;
2132 _Bool reconnect = 0;
2135 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2138 client = &se->data.client;
2141 if (client->resolve_interval != 0 && client->next_resolve_reconnect < now) {
2142 DEBUG("network plugin: Reconnecting socket, resolve_interval = %lf, next_resolve_reconnect = %lf",
2143 CDTIME_T_TO_DOUBLE(client->resolve_interval), CDTIME_T_TO_DOUBLE(client->next_resolve_reconnect));
2147 if (client->fd >= 0 && !reconnect) /* already connected and not stale*/
2150 memset (&ai_hints, 0, sizeof (ai_hints));
2151 #ifdef AI_ADDRCONFIG
2152 ai_hints.ai_flags |= AI_ADDRCONFIG;
2154 ai_hints.ai_family = AF_UNSPEC;
2155 ai_hints.ai_socktype = SOCK_DGRAM;
2156 ai_hints.ai_protocol = IPPROTO_UDP;
2158 status = getaddrinfo (se->node,
2159 (se->service != NULL) ? se->service : NET_DEFAULT_PORT,
2160 &ai_hints, &ai_list);
2163 c_complain (LOG_ERR, &complaint,
2164 "network plugin: getaddrinfo (%s, %s) failed: %s",
2165 (se->node == NULL) ? "(null)" : se->node,
2166 (se->service == NULL) ? "(null)" : se->service,
2167 gai_strerror (status));
2172 c_release (LOG_NOTICE, &complaint,
2173 "network plugin: Successfully resolved \"%s\".",
2177 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2179 if (client->fd >= 0) /* when we reconnect */
2180 sockent_client_disconnect(se);
2182 client->fd = socket (ai_ptr->ai_family,
2183 ai_ptr->ai_socktype,
2184 ai_ptr->ai_protocol);
2188 ERROR ("network plugin: socket(2) failed: %s",
2189 sstrerror (errno, errbuf,
2194 client->addr = malloc (sizeof (*client->addr));
2195 if (client->addr == NULL)
2197 ERROR ("network plugin: malloc failed.");
2203 memset (client->addr, 0, sizeof (*client->addr));
2204 assert (sizeof (*client->addr) >= ai_ptr->ai_addrlen);
2205 memcpy (client->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2206 client->addrlen = ai_ptr->ai_addrlen;
2208 network_set_ttl (se, ai_ptr);
2209 network_set_interface (se, ai_ptr);
2211 /* We don't open more than one write-socket per
2212 * node/service pair.. */
2216 freeaddrinfo (ai_list);
2220 if (client->resolve_interval > 0)
2221 client->next_resolve_reconnect = now + client->resolve_interval;
2223 } /* }}} int sockent_client_connect */
2225 /* Open the file descriptors for a initialized sockent structure. */
2226 static int sockent_server_listen (sockent_t *se) /* {{{ */
2228 struct addrinfo ai_hints;
2229 struct addrinfo *ai_list, *ai_ptr;
2233 const char *service;
2239 service = se->service;
2241 if (service == NULL)
2242 service = NET_DEFAULT_PORT;
2244 DEBUG ("network plugin: sockent_server_listen: node = %s; service = %s;",
2247 memset (&ai_hints, 0, sizeof (ai_hints));
2248 ai_hints.ai_flags = 0;
2250 ai_hints.ai_flags |= AI_PASSIVE;
2252 #ifdef AI_ADDRCONFIG
2253 ai_hints.ai_flags |= AI_ADDRCONFIG;
2255 ai_hints.ai_family = AF_UNSPEC;
2256 ai_hints.ai_socktype = SOCK_DGRAM;
2257 ai_hints.ai_protocol = IPPROTO_UDP;
2259 status = getaddrinfo (node, service, &ai_hints, &ai_list);
2262 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
2263 (se->node == NULL) ? "(null)" : se->node,
2264 (se->service == NULL) ? "(null)" : se->service,
2265 gai_strerror (status));
2269 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2273 tmp = realloc (se->data.server.fd,
2274 sizeof (*tmp) * (se->data.server.fd_num + 1));
2277 ERROR ("network plugin: realloc failed.");
2280 se->data.server.fd = tmp;
2281 tmp = se->data.server.fd + se->data.server.fd_num;
2283 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
2284 ai_ptr->ai_protocol);
2288 ERROR ("network plugin: socket(2) failed: %s",
2289 sstrerror (errno, errbuf,
2294 status = network_bind_socket (*tmp, ai_ptr, se->interface);
2302 se->data.server.fd_num++;
2304 } /* for (ai_list) */
2306 freeaddrinfo (ai_list);
2308 if (se->data.server.fd_num <= 0)
2311 } /* }}} int sockent_server_listen */
2313 /* Add a sockent to the global list of sockets */
2314 static int sockent_add (sockent_t *se) /* {{{ */
2316 sockent_t *last_ptr;
2321 if (se->type == SOCKENT_TYPE_SERVER)
2326 tmp = realloc (listen_sockets_pollfd,
2327 sizeof (*tmp) * (listen_sockets_num
2328 + se->data.server.fd_num));
2331 ERROR ("network plugin: realloc failed.");
2334 listen_sockets_pollfd = tmp;
2335 tmp = listen_sockets_pollfd + listen_sockets_num;
2337 for (i = 0; i < se->data.server.fd_num; i++)
2339 memset (tmp + i, 0, sizeof (*tmp));
2340 tmp[i].fd = se->data.server.fd[i];
2341 tmp[i].events = POLLIN | POLLPRI;
2345 listen_sockets_num += se->data.server.fd_num;
2347 if (listen_sockets == NULL)
2349 listen_sockets = se;
2352 last_ptr = listen_sockets;
2354 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2356 if (sending_sockets == NULL)
2358 sending_sockets = se;
2361 last_ptr = sending_sockets;
2364 while (last_ptr->next != NULL)
2365 last_ptr = last_ptr->next;
2366 last_ptr->next = se;
2369 } /* }}} int sockent_add */
2371 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
2375 receive_list_entry_t *ent;
2378 /* Lock and wait for more data to come in */
2379 pthread_mutex_lock (&receive_list_lock);
2380 while ((listen_loop == 0)
2381 && (receive_list_head == NULL))
2382 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
2384 /* Remove the head entry and unlock */
2385 ent = receive_list_head;
2387 receive_list_head = ent->next;
2388 receive_list_length--;
2389 pthread_mutex_unlock (&receive_list_lock);
2391 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2392 * because we dispatch all missing packets before shutting down. */
2396 /* Look for the correct `sockent_t' */
2397 se = listen_sockets;
2402 for (i = 0; i < se->data.server.fd_num; i++)
2403 if (se->data.server.fd[i] == ent->fd)
2406 if (i < se->data.server.fd_num)
2414 ERROR ("network plugin: Got packet from FD %i, but can't "
2415 "find an appropriate socket entry.",
2422 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0,
2423 /* username = */ NULL);
2429 } /* }}} void *dispatch_thread */
2431 static int network_receive (void) /* {{{ */
2433 char buffer[network_config_packet_size];
2439 receive_list_entry_t *private_list_head;
2440 receive_list_entry_t *private_list_tail;
2441 uint64_t private_list_length;
2443 assert (listen_sockets_num > 0);
2445 private_list_head = NULL;
2446 private_list_tail = NULL;
2447 private_list_length = 0;
2449 while (listen_loop == 0)
2451 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2458 ERROR ("poll failed: %s",
2459 sstrerror (errno, errbuf, sizeof (errbuf)));
2463 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2465 receive_list_entry_t *ent;
2467 if ((listen_sockets_pollfd[i].revents
2468 & (POLLIN | POLLPRI)) == 0)
2472 buffer_len = recv (listen_sockets_pollfd[i].fd,
2473 buffer, sizeof (buffer),
2478 ERROR ("recv failed: %s",
2479 sstrerror (errno, errbuf,
2484 stats_octets_rx += ((uint64_t) buffer_len);
2487 /* TODO: Possible performance enhancement: Do not free
2488 * these entries in the dispatch thread but put them in
2489 * another list, so we don't have to allocate more and
2490 * more of these structures. */
2491 ent = malloc (sizeof (receive_list_entry_t));
2494 ERROR ("network plugin: malloc failed.");
2497 memset (ent, 0, sizeof (receive_list_entry_t));
2498 ent->data = malloc (network_config_packet_size);
2499 if (ent->data == NULL)
2502 ERROR ("network plugin: malloc failed.");
2505 ent->fd = listen_sockets_pollfd[i].fd;
2508 memcpy (ent->data, buffer, buffer_len);
2509 ent->data_len = buffer_len;
2511 if (private_list_head == NULL)
2512 private_list_head = ent;
2514 private_list_tail->next = ent;
2515 private_list_tail = ent;
2516 private_list_length++;
2518 /* Do not block here. Blocking here has led to
2519 * insufficient performance in the past. */
2520 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2522 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2523 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2525 if (receive_list_head == NULL)
2526 receive_list_head = private_list_head;
2528 receive_list_tail->next = private_list_head;
2529 receive_list_tail = private_list_tail;
2530 receive_list_length += private_list_length;
2532 pthread_cond_signal (&receive_list_cond);
2533 pthread_mutex_unlock (&receive_list_lock);
2535 private_list_head = NULL;
2536 private_list_tail = NULL;
2537 private_list_length = 0;
2539 } /* for (listen_sockets_pollfd) */
2540 } /* while (listen_loop == 0) */
2542 /* Make sure everything is dispatched before exiting. */
2543 if (private_list_head != NULL)
2545 pthread_mutex_lock (&receive_list_lock);
2547 if (receive_list_head == NULL)
2548 receive_list_head = private_list_head;
2550 receive_list_tail->next = private_list_head;
2551 receive_list_tail = private_list_tail;
2552 receive_list_length += private_list_length;
2554 private_list_head = NULL;
2555 private_list_tail = NULL;
2556 private_list_length = 0;
2558 pthread_cond_signal (&receive_list_cond);
2559 pthread_mutex_unlock (&receive_list_lock);
2563 } /* }}} int network_receive */
2565 static void *receive_thread (void __attribute__((unused)) *arg)
2567 return (network_receive () ? (void *) 1 : (void *) 0);
2568 } /* void *receive_thread */
2570 static void network_init_buffer (void)
2572 memset (send_buffer, 0, network_config_packet_size);
2573 send_buffer_ptr = send_buffer;
2574 send_buffer_fill = 0;
2576 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2577 } /* int network_init_buffer */
2579 static void networt_send_buffer_plain (sockent_t *se, /* {{{ */
2580 const char *buffer, size_t buffer_size)
2586 status = sockent_client_connect (se);
2590 status = sendto (se->data.client.fd, buffer, buffer_size,
2592 (struct sockaddr *) se->data.client.addr,
2593 se->data.client.addrlen);
2598 if ((errno == EINTR) || (errno == EAGAIN))
2601 ERROR ("network plugin: sendto failed: %s. Closing sending socket.",
2602 sstrerror (errno, errbuf, sizeof (errbuf)));
2603 sockent_client_disconnect (se);
2609 } /* }}} void networt_send_buffer_plain */
2612 #define BUFFER_ADD(p,s) do { \
2613 memcpy (buffer + buffer_offset, (p), (s)); \
2614 buffer_offset += (s); \
2617 static void networt_send_buffer_signed (sockent_t *se, /* {{{ */
2618 const char *in_buffer, size_t in_buffer_size)
2620 part_signature_sha256_t ps;
2621 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2622 size_t buffer_offset;
2623 size_t username_len;
2627 unsigned char *hash;
2630 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2633 ERROR ("network plugin: Creating HMAC object failed: %s",
2634 gcry_strerror (err));
2638 err = gcry_md_setkey (hd, se->data.client.password,
2639 strlen (se->data.client.password));
2642 ERROR ("network plugin: gcry_md_setkey failed: %s",
2643 gcry_strerror (err));
2648 username_len = strlen (se->data.client.username);
2649 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2651 ERROR ("network plugin: Username too long: %s",
2652 se->data.client.username);
2656 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2657 se->data.client.username, username_len);
2658 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2659 in_buffer, in_buffer_size);
2661 /* Initialize the `ps' structure. */
2662 memset (&ps, 0, sizeof (ps));
2663 ps.head.type = htons (TYPE_SIGN_SHA256);
2664 ps.head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len);
2666 /* Calculate the hash value. */
2667 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2668 username_len + in_buffer_size);
2669 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2672 ERROR ("network plugin: gcry_md_read failed.");
2676 memcpy (ps.hash, hash, sizeof (ps.hash));
2678 /* Add the header */
2681 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2682 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2683 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2685 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2690 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2691 networt_send_buffer_plain (se, buffer, buffer_offset);
2692 } /* }}} void networt_send_buffer_signed */
2694 static void networt_send_buffer_encrypted (sockent_t *se, /* {{{ */
2695 const char *in_buffer, size_t in_buffer_size)
2697 part_encryption_aes256_t pea;
2698 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2700 size_t buffer_offset;
2702 size_t username_len;
2704 gcry_cipher_hd_t cypher;
2706 /* Initialize the header fields */
2707 memset (&pea, 0, sizeof (pea));
2708 pea.head.type = htons (TYPE_ENCR_AES256);
2710 pea.username = se->data.client.username;
2712 username_len = strlen (pea.username);
2713 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2715 ERROR ("network plugin: Username too long: %s", pea.username);
2719 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2720 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2721 - sizeof (pea.hash);
2723 assert (buffer_size <= sizeof (buffer));
2724 DEBUG ("network plugin: networt_send_buffer_encrypted: "
2725 "buffer_size = %zu;", buffer_size);
2727 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2728 + username_len + in_buffer_size));
2729 pea.username_length = htons ((uint16_t) username_len);
2731 /* Chose a random initialization vector. */
2732 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2734 /* Create hash of the payload */
2735 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2737 /* Initialize the buffer */
2739 memset (buffer, 0, sizeof (buffer));
2742 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2743 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2744 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2745 BUFFER_ADD (pea.username, username_len);
2746 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2747 assert (buffer_offset == header_size);
2748 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2749 BUFFER_ADD (in_buffer, in_buffer_size);
2751 assert (buffer_offset == buffer_size);
2753 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2754 se->data.client.password);
2758 /* Encrypt the buffer in-place */
2759 err = gcry_cipher_encrypt (cypher,
2760 buffer + header_size,
2761 buffer_size - header_size,
2762 /* in = */ NULL, /* in len = */ 0);
2765 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2766 gcry_strerror (err));
2770 /* Send it out without further modifications */
2771 networt_send_buffer_plain (se, buffer, buffer_size);
2772 } /* }}} void networt_send_buffer_encrypted */
2774 #endif /* HAVE_LIBGCRYPT */
2776 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2780 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2782 for (se = sending_sockets; se != NULL; se = se->next)
2785 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2786 networt_send_buffer_encrypted (se, buffer, buffer_len);
2787 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2788 networt_send_buffer_signed (se, buffer, buffer_len);
2789 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2790 #endif /* HAVE_LIBGCRYPT */
2791 networt_send_buffer_plain (se, buffer, buffer_len);
2792 } /* for (sending_sockets) */
2793 } /* }}} void network_send_buffer */
2795 static int add_to_buffer (char *buffer, int buffer_size, /* {{{ */
2796 value_list_t *vl_def,
2797 const data_set_t *ds, const value_list_t *vl)
2799 char *buffer_orig = buffer;
2801 if (strcmp (vl_def->host, vl->host) != 0)
2803 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2804 vl->host, strlen (vl->host)) != 0)
2806 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2809 if (vl_def->time != vl->time)
2811 if (write_part_number (&buffer, &buffer_size, TYPE_TIME_HR,
2812 (uint64_t) vl->time))
2814 vl_def->time = vl->time;
2817 if (vl_def->interval != vl->interval)
2819 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL_HR,
2820 (uint64_t) vl->interval))
2822 vl_def->interval = vl->interval;
2825 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2827 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2828 vl->plugin, strlen (vl->plugin)) != 0)
2830 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2833 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2835 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2836 vl->plugin_instance,
2837 strlen (vl->plugin_instance)) != 0)
2839 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2842 if (strcmp (vl_def->type, vl->type) != 0)
2844 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2845 vl->type, strlen (vl->type)) != 0)
2847 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2850 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2852 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2854 strlen (vl->type_instance)) != 0)
2856 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2859 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2862 return (buffer - buffer_orig);
2863 } /* }}} int add_to_buffer */
2865 static void flush_buffer (void)
2867 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2870 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2872 stats_octets_tx += ((uint64_t) send_buffer_fill);
2875 network_init_buffer ();
2878 static int network_write (const data_set_t *ds, const value_list_t *vl,
2879 user_data_t __attribute__((unused)) *user_data)
2883 if (!check_send_okay (vl))
2886 char name[6*DATA_MAX_NAME_LEN];
2887 FORMAT_VL (name, sizeof (name), vl);
2888 name[sizeof (name) - 1] = 0;
2889 DEBUG ("network plugin: network_write: "
2890 "NOT sending %s.", name);
2892 /* Counter is not protected by another lock and may be reached by
2893 * multiple threads */
2894 pthread_mutex_lock (&stats_lock);
2895 stats_values_not_sent++;
2896 pthread_mutex_unlock (&stats_lock);
2900 uc_meta_data_add_unsigned_int (vl,
2901 "network:time_sent", (uint64_t) vl->time);
2903 pthread_mutex_lock (&send_buffer_lock);
2905 status = add_to_buffer (send_buffer_ptr,
2906 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2911 /* status == bytes added to the buffer */
2912 send_buffer_fill += status;
2913 send_buffer_ptr += status;
2915 stats_values_sent++;
2921 status = add_to_buffer (send_buffer_ptr,
2922 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2928 send_buffer_fill += status;
2929 send_buffer_ptr += status;
2931 stats_values_sent++;
2937 ERROR ("network plugin: Unable to append to the "
2938 "buffer for some weird reason");
2940 else if ((network_config_packet_size - send_buffer_fill) < 15)
2945 pthread_mutex_unlock (&send_buffer_lock);
2947 return ((status < 0) ? -1 : 0);
2948 } /* int network_write */
2950 static int network_config_set_boolean (const oconfig_item_t *ci, /* {{{ */
2953 if ((ci->values_num != 1)
2954 || ((ci->values[0].type != OCONFIG_TYPE_BOOLEAN)
2955 && (ci->values[0].type != OCONFIG_TYPE_STRING)))
2957 ERROR ("network plugin: The `%s' config option needs "
2958 "exactly one boolean argument.", ci->key);
2962 if (ci->values[0].type == OCONFIG_TYPE_BOOLEAN)
2964 if (ci->values[0].value.boolean)
2971 char *str = ci->values[0].value.string;
2975 else if (IS_FALSE (str))
2979 ERROR ("network plugin: Cannot parse string value `%s' of the `%s' "
2980 "option as boolean value.",
2987 } /* }}} int network_config_set_boolean */
2989 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2992 if ((ci->values_num != 1)
2993 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2995 WARNING ("network plugin: The `TimeToLive' config option needs exactly "
2996 "one numeric argument.");
3000 tmp = (int) ci->values[0].value.number;
3001 if ((tmp > 0) && (tmp <= 255))
3002 network_config_ttl = tmp;
3004 WARNING ("network plugin: The `TimeToLive' must be between 1 and 255.");
3009 } /* }}} int network_config_set_ttl */
3011 static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
3014 if ((ci->values_num != 1)
3015 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3017 WARNING ("network plugin: The `Interface' config option needs exactly "
3018 "one string argument.");
3022 if (interface == NULL)
3025 *interface = if_nametoindex (ci->values[0].value.string);
3028 } /* }}} int network_config_set_interface */
3030 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
3033 if ((ci->values_num != 1)
3034 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
3036 WARNING ("network plugin: The `MaxPacketSize' config option needs exactly "
3037 "one numeric argument.");
3041 tmp = (int) ci->values[0].value.number;
3042 if ((tmp >= 1024) && (tmp <= 65535))
3043 network_config_packet_size = tmp;
3046 } /* }}} int network_config_set_buffer_size */
3049 static int network_config_set_string (const oconfig_item_t *ci, /* {{{ */
3053 if ((ci->values_num != 1)
3054 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3056 WARNING ("network plugin: The `%s' config option needs exactly "
3057 "one string argument.", ci->key);
3061 tmp = strdup (ci->values[0].value.string);
3065 sfree (*ret_string);
3069 } /* }}} int network_config_set_string */
3070 #endif /* HAVE_LIBGCRYPT */
3073 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
3077 if ((ci->values_num != 1)
3078 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3080 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
3081 "one string argument.");
3085 str = ci->values[0].value.string;
3086 if (strcasecmp ("Encrypt", str) == 0)
3087 *retval = SECURITY_LEVEL_ENCRYPT;
3088 else if (strcasecmp ("Sign", str) == 0)
3089 *retval = SECURITY_LEVEL_SIGN;
3090 else if (strcasecmp ("None", str) == 0)
3091 *retval = SECURITY_LEVEL_NONE;
3094 WARNING ("network plugin: Unknown security level: %s.", str);
3099 } /* }}} int network_config_set_security_level */
3100 #endif /* HAVE_LIBGCRYPT */
3102 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
3108 if ((ci->values_num < 1) || (ci->values_num > 2)
3109 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3110 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3112 ERROR ("network plugin: The `%s' config option needs "
3113 "one or two string arguments.", ci->key);
3117 se = sockent_create (SOCKENT_TYPE_SERVER);
3120 ERROR ("network plugin: sockent_create failed.");
3124 se->node = strdup (ci->values[0].value.string);
3125 if (ci->values_num >= 2)
3126 se->service = strdup (ci->values[1].value.string);
3128 for (i = 0; i < ci->children_num; i++)
3130 oconfig_item_t *child = ci->children + i;
3133 if (strcasecmp ("AuthFile", child->key) == 0)
3134 network_config_set_string (child, &se->data.server.auth_file);
3135 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3136 network_config_set_security_level (child,
3137 &se->data.server.security_level);
3139 #endif /* HAVE_LIBGCRYPT */
3140 if (strcasecmp ("Interface", child->key) == 0)
3141 network_config_set_interface (child,
3145 WARNING ("network plugin: Option `%s' is not allowed here.",
3151 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
3152 && (se->data.server.auth_file == NULL))
3154 ERROR ("network plugin: A security level higher than `none' was "
3155 "requested, but no AuthFile option was given. Cowardly refusing to "
3156 "open this socket!");
3157 sockent_destroy (se);
3160 #endif /* HAVE_LIBGCRYPT */
3162 status = sockent_init_crypto (se);
3165 ERROR ("network plugin: network_config_add_listen: sockent_init_crypto() failed.");
3166 sockent_destroy (se);
3170 status = sockent_server_listen (se);
3173 ERROR ("network plugin: network_config_add_server: sockent_server_listen failed.");
3174 sockent_destroy (se);
3178 status = sockent_add (se);
3181 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
3182 sockent_destroy (se);
3187 } /* }}} int network_config_add_listen */
3189 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
3195 if ((ci->values_num < 1) || (ci->values_num > 2)
3196 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3197 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3199 ERROR ("network plugin: The `%s' config option needs "
3200 "one or two string arguments.", ci->key);
3204 se = sockent_create (SOCKENT_TYPE_CLIENT);
3207 ERROR ("network plugin: sockent_create failed.");
3211 se->node = strdup (ci->values[0].value.string);
3212 if (ci->values_num >= 2)
3213 se->service = strdup (ci->values[1].value.string);
3215 for (i = 0; i < ci->children_num; i++)
3217 oconfig_item_t *child = ci->children + i;
3220 if (strcasecmp ("Username", child->key) == 0)
3221 network_config_set_string (child, &se->data.client.username);
3222 else if (strcasecmp ("Password", child->key) == 0)
3223 network_config_set_string (child, &se->data.client.password);
3224 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3225 network_config_set_security_level (child,
3226 &se->data.client.security_level);
3228 #endif /* HAVE_LIBGCRYPT */
3229 if (strcasecmp ("Interface", child->key) == 0)
3230 network_config_set_interface (child,
3232 else if (strcasecmp ("ResolveInterval", child->key) == 0)
3233 cf_util_get_cdtime(child, &se->data.client.resolve_interval);
3236 WARNING ("network plugin: Option `%s' is not allowed here.",
3242 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
3243 && ((se->data.client.username == NULL)
3244 || (se->data.client.password == NULL)))
3246 ERROR ("network plugin: A security level higher than `none' was "
3247 "requested, but no Username or Password option was given. "
3248 "Cowardly refusing to open this socket!");
3249 sockent_destroy (se);
3252 #endif /* HAVE_LIBGCRYPT */
3254 status = sockent_init_crypto (se);
3257 ERROR ("network plugin: network_config_add_server: sockent_init_crypto() failed.");
3258 sockent_destroy (se);
3262 /* No call to sockent_client_connect() here -- it is called from
3263 * networt_send_buffer_plain(). */
3265 status = sockent_add (se);
3268 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
3269 sockent_destroy (se);
3274 } /* }}} int network_config_add_server */
3276 static int network_config (oconfig_item_t *ci) /* {{{ */
3280 /* The options need to be applied first */
3281 for (i = 0; i < ci->children_num; i++)
3283 oconfig_item_t *child = ci->children + i;
3284 if (strcasecmp ("TimeToLive", child->key) == 0)
3285 network_config_set_ttl (child);
3288 for (i = 0; i < ci->children_num; i++)
3290 oconfig_item_t *child = ci->children + i;
3292 if (strcasecmp ("Listen", child->key) == 0)
3293 network_config_add_listen (child);
3294 else if (strcasecmp ("Server", child->key) == 0)
3295 network_config_add_server (child);
3296 else if (strcasecmp ("TimeToLive", child->key) == 0) {
3297 /* Handled earlier */
3299 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
3300 network_config_set_buffer_size (child);
3301 else if (strcasecmp ("Forward", child->key) == 0)
3302 network_config_set_boolean (child, &network_config_forward);
3303 else if (strcasecmp ("ReportStats", child->key) == 0)
3304 network_config_set_boolean (child, &network_config_stats);
3307 WARNING ("network plugin: Option `%s' is not allowed here.",
3313 } /* }}} int network_config */
3315 static int network_notification (const notification_t *n,
3316 user_data_t __attribute__((unused)) *user_data)
3318 char buffer[network_config_packet_size];
3319 char *buffer_ptr = buffer;
3320 int buffer_free = sizeof (buffer);
3323 if (!check_send_notify_okay (n))
3326 memset (buffer, 0, sizeof (buffer));
3328 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME_HR,
3329 (uint64_t) n->time);
3333 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
3334 (uint64_t) n->severity);
3338 if (strlen (n->host) > 0)
3340 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
3341 n->host, strlen (n->host));
3346 if (strlen (n->plugin) > 0)
3348 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
3349 n->plugin, strlen (n->plugin));
3354 if (strlen (n->plugin_instance) > 0)
3356 status = write_part_string (&buffer_ptr, &buffer_free,
3357 TYPE_PLUGIN_INSTANCE,
3358 n->plugin_instance, strlen (n->plugin_instance));
3363 if (strlen (n->type) > 0)
3365 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3366 n->type, strlen (n->type));
3371 if (strlen (n->type_instance) > 0)
3373 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3374 n->type_instance, strlen (n->type_instance));
3379 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3380 n->message, strlen (n->message));
3384 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3387 } /* int network_notification */
3389 static int network_shutdown (void)
3395 /* Kill the listening thread */
3396 if (receive_thread_running != 0)
3398 INFO ("network plugin: Stopping receive thread.");
3399 pthread_kill (receive_thread_id, SIGTERM);
3400 pthread_join (receive_thread_id, NULL /* no return value */);
3401 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3402 receive_thread_running = 0;
3405 /* Shutdown the dispatching thread */
3406 if (dispatch_thread_running != 0)
3408 INFO ("network plugin: Stopping dispatch thread.");
3409 pthread_mutex_lock (&receive_list_lock);
3410 pthread_cond_broadcast (&receive_list_cond);
3411 pthread_mutex_unlock (&receive_list_lock);
3412 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3413 dispatch_thread_running = 0;
3416 sockent_destroy (listen_sockets);
3418 if (send_buffer_fill > 0)
3421 sfree (send_buffer);
3423 for (se = sending_sockets; se != NULL; se = se->next)
3424 sockent_client_disconnect (se);
3425 sockent_destroy (sending_sockets);
3427 plugin_unregister_config ("network");
3428 plugin_unregister_init ("network");
3429 plugin_unregister_write ("network");
3430 plugin_unregister_shutdown ("network");
3433 } /* int network_shutdown */
3435 static int network_stats_read (void) /* {{{ */
3437 derive_t copy_octets_rx;
3438 derive_t copy_octets_tx;
3439 derive_t copy_packets_rx;
3440 derive_t copy_packets_tx;
3441 derive_t copy_values_dispatched;
3442 derive_t copy_values_not_dispatched;
3443 derive_t copy_values_sent;
3444 derive_t copy_values_not_sent;
3445 derive_t copy_receive_list_length;
3446 value_list_t vl = VALUE_LIST_INIT;
3449 copy_octets_rx = stats_octets_rx;
3450 copy_octets_tx = stats_octets_tx;
3451 copy_packets_rx = stats_packets_rx;
3452 copy_packets_tx = stats_packets_tx;
3453 copy_values_dispatched = stats_values_dispatched;
3454 copy_values_not_dispatched = stats_values_not_dispatched;
3455 copy_values_sent = stats_values_sent;
3456 copy_values_not_sent = stats_values_not_sent;
3457 copy_receive_list_length = receive_list_length;
3459 /* Initialize `vl' */
3463 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3464 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3466 /* Octets received / sent */
3467 vl.values[0].derive = (derive_t) copy_octets_rx;
3468 vl.values[1].derive = (derive_t) copy_octets_tx;
3469 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3470 plugin_dispatch_values (&vl);
3472 /* Packets received / send */
3473 vl.values[0].derive = (derive_t) copy_packets_rx;
3474 vl.values[1].derive = (derive_t) copy_packets_tx;
3475 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3476 plugin_dispatch_values (&vl);
3478 /* Values (not) dispatched and (not) send */
3479 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3482 vl.values[0].derive = (derive_t) copy_values_dispatched;
3483 sstrncpy (vl.type_instance, "dispatch-accepted",
3484 sizeof (vl.type_instance));
3485 plugin_dispatch_values (&vl);
3487 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3488 sstrncpy (vl.type_instance, "dispatch-rejected",
3489 sizeof (vl.type_instance));
3490 plugin_dispatch_values (&vl);
3492 vl.values[0].derive = (derive_t) copy_values_sent;
3493 sstrncpy (vl.type_instance, "send-accepted",
3494 sizeof (vl.type_instance));
3495 plugin_dispatch_values (&vl);
3497 vl.values[0].derive = (derive_t) copy_values_not_sent;
3498 sstrncpy (vl.type_instance, "send-rejected",
3499 sizeof (vl.type_instance));
3500 plugin_dispatch_values (&vl);
3502 /* Receive queue length */
3503 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3504 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3505 vl.type_instance[0] = 0;
3506 plugin_dispatch_values (&vl);
3509 } /* }}} int network_stats_read */
3511 static int network_init (void)
3513 static _Bool have_init = 0;
3515 /* Check if we were already initialized. If so, just return - there's
3516 * nothing more to do (for now, that is). */
3522 network_init_gcrypt ();
3525 if (network_config_stats != 0)
3526 plugin_register_read ("network", network_stats_read);
3528 plugin_register_shutdown ("network", network_shutdown);
3530 send_buffer = malloc (network_config_packet_size);
3531 if (send_buffer == NULL)
3533 ERROR ("network plugin: malloc failed.");
3536 network_init_buffer ();
3538 /* setup socket(s) and so on */
3539 if (sending_sockets != NULL)
3541 plugin_register_write ("network", network_write,
3542 /* user_data = */ NULL);
3543 plugin_register_notification ("network", network_notification,
3544 /* user_data = */ NULL);
3547 /* If no threads need to be started, return here. */
3548 if ((listen_sockets_num == 0)
3549 || ((dispatch_thread_running != 0)
3550 && (receive_thread_running != 0)))
3553 if (dispatch_thread_running == 0)
3556 status = plugin_thread_create (&dispatch_thread_id,
3557 NULL /* no attributes */,
3559 NULL /* no argument */);
3563 ERROR ("network: pthread_create failed: %s",
3564 sstrerror (errno, errbuf,
3569 dispatch_thread_running = 1;
3573 if (receive_thread_running == 0)
3576 status = plugin_thread_create (&receive_thread_id,
3577 NULL /* no attributes */,
3579 NULL /* no argument */);
3583 ERROR ("network: pthread_create failed: %s",
3584 sstrerror (errno, errbuf,
3589 receive_thread_running = 1;
3594 } /* int network_init */
3597 * The flush option of the network plugin cannot flush individual identifiers.
3598 * All the values are added to a buffer and sent when the buffer is full, the
3599 * requested value may or may not be in there, it's not worth finding out. We
3600 * just send the buffer if `flush' is called - if the requested value was in
3601 * there, good. If not, well, then there is nothing to flush.. -octo
3603 static int network_flush (__attribute__((unused)) cdtime_t timeout,
3604 __attribute__((unused)) const char *identifier,
3605 __attribute__((unused)) user_data_t *user_data)
3607 pthread_mutex_lock (&send_buffer_lock);
3609 if (send_buffer_fill > 0)
3612 pthread_mutex_unlock (&send_buffer_lock);
3615 } /* int network_flush */
3617 void module_register (void)
3619 plugin_register_complex_config ("network", network_config);
3620 plugin_register_init ("network", network_init);
3621 plugin_register_flush ("network", network_flush,
3622 /* user_data = */ NULL);
3623 } /* void module_register */
3625 /* vim: set fdm=marker : */