2 * collectd - src/network.c
3 * Copyright (C) 2005-2009 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 verplant.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 GCRY_THREAD_OPTION_PTHREAD_IMPL;
65 #ifndef IPV6_ADD_MEMBERSHIP
66 # ifdef IPV6_JOIN_GROUP
67 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
69 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
71 #endif /* !IP_ADD_MEMBERSHIP */
74 * Maximum size required for encryption / signing:
76 * 42 bytes for the encryption header
77 * + 64 bytes for the username
81 #define BUFF_SIG_SIZE 106
86 #define SECURITY_LEVEL_NONE 0
88 # define SECURITY_LEVEL_SIGN 1
89 # define SECURITY_LEVEL_ENCRYPT 2
94 struct sockaddr_storage *addr;
100 gcry_cipher_hd_t cypher;
101 unsigned char password_hash[32];
105 struct sockent_server
113 gcry_cipher_hd_t cypher;
117 typedef struct sockent
119 #define SOCKENT_TYPE_CLIENT 1
120 #define SOCKENT_TYPE_SERVER 2
129 struct sockent_client client;
130 struct sockent_server server;
133 struct sockent *next;
136 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
137 * 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
138 * +-------+-----------------------+-------------------------------+
139 * ! Ver. ! ! Length !
140 * +-------+-----------------------+-------------------------------+
147 typedef struct part_header_s part_header_t;
149 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
150 * 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
151 * +-------------------------------+-------------------------------+
153 * +-------------------------------+-------------------------------+
154 * : (Length - 4) Bytes :
155 * +---------------------------------------------------------------+
162 typedef struct part_string_s part_string_t;
164 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
165 * 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
166 * +-------------------------------+-------------------------------+
168 * +-------------------------------+-------------------------------+
169 * : (Length - 4 == 2 || 4 || 8) Bytes :
170 * +---------------------------------------------------------------+
177 typedef struct part_number_s part_number_t;
179 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
180 * 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
181 * +-------------------------------+-------------------------------+
183 * +-------------------------------+---------------+---------------+
184 * ! Num of values ! Type0 ! Type1 !
185 * +-------------------------------+---------------+---------------+
188 * +---------------------------------------------------------------+
191 * +---------------------------------------------------------------+
196 uint16_t *num_values;
197 uint8_t *values_types;
200 typedef struct part_values_s part_values_t;
202 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
203 * 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
204 * +-------------------------------+-------------------------------+
206 * +-------------------------------+-------------------------------+
207 * ! Hash (Bits 0 - 31) !
209 * ! Hash (Bits 224 - 255) !
210 * +---------------------------------------------------------------+
213 #define PART_SIGNATURE_SHA256_SIZE 36
214 struct part_signature_sha256_s
217 unsigned char hash[32];
220 typedef struct part_signature_sha256_s part_signature_sha256_t;
222 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
223 * 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
224 * +-------------------------------+-------------------------------+
226 * +-------------------------------+-------------------------------+
227 * ! Original length ! Padding (0 - 15 bytes) !
228 * +-------------------------------+-------------------------------+
229 * ! Hash (Bits 0 - 31) !
231 * ! Hash (Bits 128 - 159) !
232 * +---------------------------------------------------------------+
235 #define PART_ENCRYPTION_AES256_SIZE 42
236 struct part_encryption_aes256_s
239 uint16_t username_length;
241 unsigned char iv[16];
243 unsigned char hash[20];
247 typedef struct part_encryption_aes256_s part_encryption_aes256_t;
249 struct receive_list_entry_s
254 struct receive_list_entry_s *next;
256 typedef struct receive_list_entry_s receive_list_entry_t;
261 static int network_config_ttl = 0;
262 static size_t network_config_packet_size = 1024;
263 static int network_config_forward = 0;
264 static int network_config_stats = 0;
266 static sockent_t *sending_sockets = NULL;
268 static receive_list_entry_t *receive_list_head = NULL;
269 static receive_list_entry_t *receive_list_tail = NULL;
270 static pthread_mutex_t receive_list_lock = PTHREAD_MUTEX_INITIALIZER;
271 static pthread_cond_t receive_list_cond = PTHREAD_COND_INITIALIZER;
272 static uint64_t receive_list_length = 0;
274 static sockent_t *listen_sockets = NULL;
275 static struct pollfd *listen_sockets_pollfd = NULL;
276 static size_t listen_sockets_num = 0;
278 /* The receive and dispatch threads will run as long as `listen_loop' is set to
280 static int listen_loop = 0;
281 static int receive_thread_running = 0;
282 static pthread_t receive_thread_id;
283 static int dispatch_thread_running = 0;
284 static pthread_t dispatch_thread_id;
286 /* Buffer in which to-be-sent network packets are constructed. */
287 static char *send_buffer;
288 static char *send_buffer_ptr;
289 static int send_buffer_fill;
290 static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
291 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
293 /* XXX: These counters are incremented from one place only. The spot in which
294 * the values are incremented is either only reachable by one thread (the
295 * dispatch thread, for example) or locked by some lock (send_buffer_lock for
296 * example). Only if neither is true, the stats_lock is acquired. The counters
297 * are always read without holding a lock in the hope that writing 8 bytes to
298 * memory is an atomic operation. */
299 static uint64_t stats_octets_rx = 0;
300 static uint64_t stats_octets_tx = 0;
301 static uint64_t stats_packets_rx = 0;
302 static uint64_t stats_packets_tx = 0;
303 static uint64_t stats_values_dispatched = 0;
304 static uint64_t stats_values_not_dispatched = 0;
305 static uint64_t stats_values_sent = 0;
306 static uint64_t stats_values_not_sent = 0;
307 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
312 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
314 uint64_t time_sent = 0;
317 status = uc_meta_data_get_unsigned_int (vl,
318 "network:time_sent", &time_sent);
320 /* This is a value we already sent. Don't allow it to be received again in
321 * order to avoid looping. */
322 if ((status == 0) && (time_sent >= ((uint64_t) vl->time)))
326 } /* }}} _Bool check_receive_okay */
328 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
330 _Bool received = false;
333 if (network_config_forward != 0)
336 if (vl->meta == NULL)
339 status = meta_data_get_boolean (vl->meta, "network:received", &received);
340 if (status == -ENOENT)
342 else if (status != 0)
344 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
345 "with status %i.", status);
349 /* By default, only *send* value lists that were not *received* by the
352 } /* }}} _Bool check_send_okay */
354 static int network_dispatch_values (value_list_t *vl, /* {{{ */
355 const char *username)
360 || (strlen (vl->host) <= 0)
361 || (strlen (vl->plugin) <= 0)
362 || (strlen (vl->type) <= 0))
365 if (!check_receive_okay (vl))
368 char name[6*DATA_MAX_NAME_LEN];
369 FORMAT_VL (name, sizeof (name), vl);
370 name[sizeof (name) - 1] = 0;
371 DEBUG ("network plugin: network_dispatch_values: "
372 "NOT dispatching %s.", name);
374 stats_values_not_dispatched++;
378 assert (vl->meta == NULL);
380 vl->meta = meta_data_create ();
381 if (vl->meta == NULL)
383 ERROR ("network plugin: meta_data_create failed.");
387 status = meta_data_add_boolean (vl->meta, "network:received", true);
390 ERROR ("network plugin: meta_data_add_boolean failed.");
391 meta_data_destroy (vl->meta);
396 if (username != NULL)
398 status = meta_data_add_string (vl->meta, "network:username", username);
401 ERROR ("network plugin: meta_data_add_string failed.");
402 meta_data_destroy (vl->meta);
408 plugin_dispatch_values_secure (vl);
409 stats_values_dispatched++;
411 meta_data_destroy (vl->meta);
415 } /* }}} int network_dispatch_values */
418 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
419 const void *iv, size_t iv_size, const char *username)
422 gcry_cipher_hd_t *cyper_ptr;
423 unsigned char password_hash[32];
425 if (se->type == SOCKENT_TYPE_CLIENT)
427 cyper_ptr = &se->data.client.cypher;
428 memcpy (password_hash, se->data.client.password_hash,
429 sizeof (password_hash));
435 cyper_ptr = &se->data.server.cypher;
437 if (username == NULL)
440 secret = fbh_get (se->data.server.userdb, username);
444 gcry_md_hash_buffer (GCRY_MD_SHA256,
446 secret, strlen (secret));
451 if (*cyper_ptr == NULL)
453 err = gcry_cipher_open (cyper_ptr,
454 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
457 ERROR ("network plugin: gcry_cipher_open returned: %s",
458 gcry_strerror (err));
465 gcry_cipher_reset (*cyper_ptr);
467 assert (*cyper_ptr != NULL);
469 err = gcry_cipher_setkey (*cyper_ptr,
470 password_hash, sizeof (password_hash));
473 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
474 gcry_strerror (err));
475 gcry_cipher_close (*cyper_ptr);
480 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
483 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
484 gcry_strerror (err));
485 gcry_cipher_close (*cyper_ptr);
491 } /* }}} int network_get_aes256_cypher */
492 #endif /* HAVE_LIBGCRYPT */
494 static int write_part_values (char **ret_buffer, int *ret_buffer_len,
495 const data_set_t *ds, const value_list_t *vl)
501 part_header_t pkg_ph;
502 uint16_t pkg_num_values;
503 uint8_t *pkg_values_types;
509 num_values = vl->values_len;
510 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
511 + (num_values * sizeof (uint8_t))
512 + (num_values * sizeof (value_t));
514 if (*ret_buffer_len < packet_len)
517 pkg_values_types = (uint8_t *) malloc (num_values * sizeof (uint8_t));
518 if (pkg_values_types == NULL)
520 ERROR ("network plugin: write_part_values: malloc failed.");
524 pkg_values = (value_t *) malloc (num_values * sizeof (value_t));
525 if (pkg_values == NULL)
527 free (pkg_values_types);
528 ERROR ("network plugin: write_part_values: malloc failed.");
532 pkg_ph.type = htons (TYPE_VALUES);
533 pkg_ph.length = htons (packet_len);
535 pkg_num_values = htons ((uint16_t) vl->values_len);
537 for (i = 0; i < num_values; i++)
539 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
540 switch (ds->ds[i].type)
542 case DS_TYPE_COUNTER:
543 pkg_values[i].counter = htonll (vl->values[i].counter);
547 pkg_values[i].gauge = htond (vl->values[i].gauge);
551 pkg_values[i].derive = htonll (vl->values[i].derive);
554 case DS_TYPE_ABSOLUTE:
555 pkg_values[i].absolute = htonll (vl->values[i].absolute);
559 free (pkg_values_types);
561 ERROR ("network plugin: write_part_values: "
562 "Unknown data source type: %i",
565 } /* switch (ds->ds[i].type) */
566 } /* for (num_values) */
569 * Use `memcpy' to write everything to the buffer, because the pointer
570 * may be unaligned and some architectures, such as SPARC, can't handle
573 packet_ptr = *ret_buffer;
575 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
576 offset += sizeof (pkg_ph);
577 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
578 offset += sizeof (pkg_num_values);
579 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
580 offset += num_values * sizeof (uint8_t);
581 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
582 offset += num_values * sizeof (value_t);
584 assert (offset == packet_len);
586 *ret_buffer = packet_ptr + packet_len;
587 *ret_buffer_len -= packet_len;
589 free (pkg_values_types);
593 } /* int write_part_values */
595 static int write_part_number (char **ret_buffer, int *ret_buffer_len,
596 int type, uint64_t value)
601 part_header_t pkg_head;
606 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
608 if (*ret_buffer_len < packet_len)
611 pkg_head.type = htons (type);
612 pkg_head.length = htons (packet_len);
613 pkg_value = htonll (value);
615 packet_ptr = *ret_buffer;
617 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
618 offset += sizeof (pkg_head);
619 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
620 offset += sizeof (pkg_value);
622 assert (offset == packet_len);
624 *ret_buffer = packet_ptr + packet_len;
625 *ret_buffer_len -= packet_len;
628 } /* int write_part_number */
630 static int write_part_string (char **ret_buffer, int *ret_buffer_len,
631 int type, const char *str, int str_len)
641 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
642 if (*ret_buffer_len < buffer_len)
645 pkg_type = htons (type);
646 pkg_length = htons (buffer_len);
648 buffer = *ret_buffer;
650 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
651 offset += sizeof (pkg_type);
652 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
653 offset += sizeof (pkg_length);
654 memcpy (buffer + offset, str, str_len);
656 memset (buffer + offset, '\0', 1);
659 assert (offset == buffer_len);
661 *ret_buffer = buffer + buffer_len;
662 *ret_buffer_len -= buffer_len;
665 } /* int write_part_string */
667 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
668 value_t **ret_values, int *ret_num_values)
670 char *buffer = *ret_buffer;
671 size_t buffer_len = *ret_buffer_len;
686 NOTICE ("network plugin: packet is too short: "
687 "buffer_len = %zu", buffer_len);
691 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
692 buffer += sizeof (tmp16);
693 pkg_type = ntohs (tmp16);
695 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
696 buffer += sizeof (tmp16);
697 pkg_length = ntohs (tmp16);
699 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
700 buffer += sizeof (tmp16);
701 pkg_numval = ntohs (tmp16);
703 assert (pkg_type == TYPE_VALUES);
705 exp_size = 3 * sizeof (uint16_t)
706 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
707 if ((buffer_len < 0) || (buffer_len < exp_size))
709 WARNING ("network plugin: parse_part_values: "
711 "Chunk of size %zu expected, "
712 "but buffer has only %zu bytes left.",
713 exp_size, buffer_len);
717 if (pkg_length != exp_size)
719 WARNING ("network plugin: parse_part_values: "
720 "Length and number of values "
721 "in the packet don't match.");
725 pkg_types = (uint8_t *) malloc (pkg_numval * sizeof (uint8_t));
726 pkg_values = (value_t *) malloc (pkg_numval * sizeof (value_t));
727 if ((pkg_types == NULL) || (pkg_values == NULL))
731 ERROR ("network plugin: parse_part_values: malloc failed.");
735 memcpy ((void *) pkg_types, (void *) buffer, pkg_numval * sizeof (uint8_t));
736 buffer += pkg_numval * sizeof (uint8_t);
737 memcpy ((void *) pkg_values, (void *) buffer, pkg_numval * sizeof (value_t));
738 buffer += pkg_numval * sizeof (value_t);
740 for (i = 0; i < pkg_numval; i++)
742 switch (pkg_types[i])
744 case DS_TYPE_COUNTER:
745 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
749 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
753 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
756 case DS_TYPE_ABSOLUTE:
757 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
761 NOTICE ("network plugin: parse_part_values: "
762 "Don't know how to handle data source type %"PRIu8,
767 } /* switch (pkg_types[i]) */
770 *ret_buffer = buffer;
771 *ret_buffer_len = buffer_len - pkg_length;
772 *ret_num_values = pkg_numval;
773 *ret_values = pkg_values;
778 } /* int parse_part_values */
780 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
783 char *buffer = *ret_buffer;
784 size_t buffer_len = *ret_buffer_len;
788 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
792 if ((buffer_len < 0) || ((size_t) buffer_len < exp_size))
794 WARNING ("network plugin: parse_part_number: "
796 "Chunk of size %zu expected, "
797 "but buffer has only %zu bytes left.",
798 exp_size, 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 *) &tmp64, buffer, sizeof (tmp64));
811 buffer += sizeof (tmp64);
812 *value = ntohll (tmp64);
814 *ret_buffer = buffer;
815 *ret_buffer_len = buffer_len - pkg_length;
818 } /* int parse_part_number */
820 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
821 char *output, int output_len)
823 char *buffer = *ret_buffer;
824 size_t buffer_len = *ret_buffer_len;
827 size_t header_size = 2 * sizeof (uint16_t);
831 if ((buffer_len < 0) || (buffer_len < header_size))
833 WARNING ("network plugin: parse_part_string: "
835 "Chunk of at least size %zu expected, "
836 "but buffer has only %zu bytes left.",
837 header_size, buffer_len);
841 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
842 buffer += sizeof (tmp16);
843 /* pkg_type = ntohs (tmp16); */
845 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
846 buffer += sizeof (tmp16);
847 pkg_length = ntohs (tmp16);
849 /* Check that packet fits in the input buffer */
850 if (pkg_length > buffer_len)
852 WARNING ("network plugin: parse_part_string: "
854 "Chunk of size %"PRIu16" received, "
855 "but buffer has only %zu bytes left.",
856 pkg_length, buffer_len);
860 /* Check that pkg_length is in the valid range */
861 if (pkg_length <= header_size)
863 WARNING ("network plugin: parse_part_string: "
865 "Header claims this packet is only %hu "
866 "bytes long.", pkg_length);
870 /* Check that the package data fits into the output buffer.
871 * The previous if-statement ensures that:
872 * `pkg_length > header_size' */
874 || ((size_t) output_len < ((size_t) pkg_length - header_size)))
876 WARNING ("network plugin: parse_part_string: "
877 "Output buffer too small.");
881 /* All sanity checks successfull, let's copy the data over */
882 output_len = pkg_length - header_size;
883 memcpy ((void *) output, (void *) buffer, output_len);
884 buffer += output_len;
886 /* For some very weird reason '\0' doesn't do the trick on SPARC in
888 if (output[output_len - 1] != 0)
890 WARNING ("network plugin: parse_part_string: "
891 "Received string does not end "
892 "with a NULL-byte.");
896 *ret_buffer = buffer;
897 *ret_buffer_len = buffer_len - pkg_length;
900 } /* int parse_part_string */
902 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
903 * parse_packet and vice versa. */
904 #define PP_SIGNED 0x01
905 #define PP_ENCRYPTED 0x02
906 static int parse_packet (sockent_t *se,
907 void *buffer, size_t buffer_size, int flags,
908 const char *username);
910 #define BUFFER_READ(p,s) do { \
911 memcpy ((p), buffer + buffer_offset, (s)); \
912 buffer_offset += (s); \
916 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
917 void **ret_buffer, size_t *ret_buffer_len, int flags)
919 static c_complain_t complain_no_users = C_COMPLAIN_INIT_STATIC;
923 size_t buffer_offset;
928 part_signature_sha256_t pss;
929 uint16_t pss_head_length;
930 char hash[sizeof (pss.hash)];
934 unsigned char *hash_ptr;
936 buffer = *ret_buffer;
937 buffer_len = *ret_buffer_len;
940 if (se->data.server.userdb == NULL)
942 c_complain (LOG_NOTICE, &complain_no_users,
943 "network plugin: Received signed network packet but can't verify it "
944 "because no user DB has been configured. Will accept it.");
948 /* Check if the buffer has enough data for this structure. */
949 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
952 /* Read type and length header */
953 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
954 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
955 pss_head_length = ntohs (pss.head.length);
957 /* Check if the `pss_head_length' is within bounds. */
958 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
959 || (pss_head_length > buffer_len))
961 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
966 BUFFER_READ (pss.hash, sizeof (pss.hash));
968 /* Calculate username length (without null byte) and allocate memory */
969 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
970 pss.username = malloc (username_len + 1);
971 if (pss.username == NULL)
974 /* Read the username */
975 BUFFER_READ (pss.username, username_len);
976 pss.username[username_len] = 0;
978 assert (buffer_offset == pss_head_length);
980 /* Query the password */
981 secret = fbh_get (se->data.server.userdb, pss.username);
984 ERROR ("network plugin: Unknown user: %s", pss.username);
985 sfree (pss.username);
989 /* Create a hash device and check the HMAC */
991 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
994 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
995 gcry_strerror (err));
997 sfree (pss.username);
1001 err = gcry_md_setkey (hd, secret, strlen (secret));
1004 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
1007 sfree (pss.username);
1012 buffer + PART_SIGNATURE_SHA256_SIZE,
1013 buffer_len - PART_SIGNATURE_SHA256_SIZE);
1014 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
1015 if (hash_ptr == NULL)
1017 ERROR ("network plugin: gcry_md_read failed.");
1020 sfree (pss.username);
1023 memcpy (hash, hash_ptr, sizeof (hash));
1029 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1031 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1036 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1037 flags | PP_SIGNED, pss.username);
1041 sfree (pss.username);
1043 *ret_buffer = buffer + buffer_len;
1044 *ret_buffer_len = 0;
1047 } /* }}} int parse_part_sign_sha256 */
1048 /* #endif HAVE_LIBGCRYPT */
1050 #else /* if !HAVE_LIBGCRYPT */
1051 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1052 void **ret_buffer, size_t *ret_buffer_size, int flags)
1054 static int warning_has_been_printed = 0;
1058 size_t buffer_offset;
1061 part_signature_sha256_t pss;
1063 buffer = *ret_buffer;
1064 buffer_size = *ret_buffer_size;
1067 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1070 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1071 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1072 part_len = ntohs (pss.head.length);
1074 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1075 || (part_len > buffer_size))
1078 if (warning_has_been_printed == 0)
1080 WARNING ("network plugin: Received signed packet, but the network "
1081 "plugin was not linked with libgcrypt, so I cannot "
1082 "verify the signature. The packet will be accepted.");
1083 warning_has_been_printed = 1;
1086 parse_packet (se, buffer + part_len, buffer_size - part_len, flags,
1087 /* username = */ NULL);
1089 *ret_buffer = buffer + buffer_size;
1090 *ret_buffer_size = 0;
1093 } /* }}} int parse_part_sign_sha256 */
1094 #endif /* !HAVE_LIBGCRYPT */
1097 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1098 void **ret_buffer, size_t *ret_buffer_len,
1101 char *buffer = *ret_buffer;
1102 size_t buffer_len = *ret_buffer_len;
1105 size_t buffer_offset;
1106 uint16_t username_len;
1107 part_encryption_aes256_t pea;
1108 unsigned char hash[sizeof (pea.hash)];
1110 gcry_cipher_hd_t cypher;
1113 /* Make sure at least the header if available. */
1114 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1116 NOTICE ("network plugin: parse_part_encr_aes256: "
1117 "Discarding short packet.");
1123 /* Copy the unencrypted information into `pea'. */
1124 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1125 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1127 /* Check the `part size'. */
1128 part_size = ntohs (pea.head.length);
1129 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1130 || (part_size > buffer_len))
1132 NOTICE ("network plugin: parse_part_encr_aes256: "
1133 "Discarding part with invalid size.");
1137 /* Read the username */
1138 BUFFER_READ (&username_len, sizeof (username_len));
1139 username_len = ntohs (username_len);
1141 if ((username_len <= 0)
1142 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1144 NOTICE ("network plugin: parse_part_encr_aes256: "
1145 "Discarding part with invalid username length.");
1149 assert (username_len > 0);
1150 pea.username = malloc (username_len + 1);
1151 if (pea.username == NULL)
1153 BUFFER_READ (pea.username, username_len);
1154 pea.username[username_len] = 0;
1156 /* Last but not least, the initialization vector */
1157 BUFFER_READ (pea.iv, sizeof (pea.iv));
1159 /* Make sure we are at the right position */
1160 assert (buffer_offset == (username_len +
1161 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1163 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1167 sfree (pea.username);
1171 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1172 assert (payload_len > 0);
1174 /* Decrypt the packet in-place */
1175 err = gcry_cipher_decrypt (cypher,
1176 buffer + buffer_offset,
1177 part_size - buffer_offset,
1178 /* in = */ NULL, /* in len = */ 0);
1181 sfree (pea.username);
1182 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1183 gcry_strerror (err));
1188 BUFFER_READ (pea.hash, sizeof (pea.hash));
1190 /* Make sure we're at the right position - again */
1191 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1192 assert (buffer_offset == (part_size - payload_len));
1194 /* Check hash sum */
1195 memset (hash, 0, sizeof (hash));
1196 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1197 buffer + buffer_offset, payload_len);
1198 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1200 sfree (pea.username);
1201 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1205 parse_packet (se, buffer + buffer_offset, payload_len,
1206 flags | PP_ENCRYPTED, pea.username);
1208 /* XXX: Free pea.username?!? */
1210 /* Update return values */
1211 *ret_buffer = buffer + part_size;
1212 *ret_buffer_len = buffer_len - part_size;
1214 sfree (pea.username);
1217 } /* }}} int parse_part_encr_aes256 */
1218 /* #endif HAVE_LIBGCRYPT */
1220 #else /* if !HAVE_LIBGCRYPT */
1221 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1222 void **ret_buffer, size_t *ret_buffer_size, int flags)
1224 static int warning_has_been_printed = 0;
1228 size_t buffer_offset;
1233 buffer = *ret_buffer;
1234 buffer_size = *ret_buffer_size;
1237 /* parse_packet assures this minimum size. */
1238 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1240 BUFFER_READ (&ph.type, sizeof (ph.type));
1241 BUFFER_READ (&ph.length, sizeof (ph.length));
1242 ph_length = ntohs (ph.length);
1244 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1245 || (ph_length > buffer_size))
1247 ERROR ("network plugin: AES-256 encrypted part "
1248 "with invalid length received.");
1252 if (warning_has_been_printed == 0)
1254 WARNING ("network plugin: Received encrypted packet, but the network "
1255 "plugin was not linked with libgcrypt, so I cannot "
1256 "decrypt it. The part will be discarded.");
1257 warning_has_been_printed = 1;
1260 *ret_buffer += ph_length;
1261 *ret_buffer_size -= ph_length;
1264 } /* }}} int parse_part_encr_aes256 */
1265 #endif /* !HAVE_LIBGCRYPT */
1269 static int parse_packet (sockent_t *se, /* {{{ */
1270 void *buffer, size_t buffer_size, int flags,
1271 const char *username)
1275 value_list_t vl = VALUE_LIST_INIT;
1279 int packet_was_signed = (flags & PP_SIGNED);
1280 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1281 int printed_ignore_warning = 0;
1282 #endif /* HAVE_LIBGCRYPT */
1285 memset (&vl, '\0', sizeof (vl));
1286 memset (&n, '\0', sizeof (n));
1289 while ((status == 0) && (0 < buffer_size)
1290 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1292 uint16_t pkg_length;
1295 memcpy ((void *) &pkg_type,
1298 memcpy ((void *) &pkg_length,
1299 (void *) (buffer + sizeof (pkg_type)),
1300 sizeof (pkg_length));
1302 pkg_length = ntohs (pkg_length);
1303 pkg_type = ntohs (pkg_type);
1305 if (pkg_length > buffer_size)
1307 /* Ensure that this loop terminates eventually */
1308 if (pkg_length < (2 * sizeof (uint16_t)))
1311 if (pkg_type == TYPE_ENCR_AES256)
1313 status = parse_part_encr_aes256 (se,
1314 &buffer, &buffer_size, flags);
1317 ERROR ("network plugin: Decrypting AES256 "
1319 "with status %i.", status);
1324 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1325 && (packet_was_encrypted == 0))
1327 if (printed_ignore_warning == 0)
1329 INFO ("network plugin: Unencrypted packet or "
1330 "part has been ignored.");
1331 printed_ignore_warning = 1;
1333 buffer = ((char *) buffer) + pkg_length;
1336 #endif /* HAVE_LIBGCRYPT */
1337 else if (pkg_type == TYPE_SIGN_SHA256)
1339 status = parse_part_sign_sha256 (se,
1340 &buffer, &buffer_size, flags);
1343 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1345 "with status %i.", status);
1350 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1351 && (packet_was_encrypted == 0)
1352 && (packet_was_signed == 0))
1354 if (printed_ignore_warning == 0)
1356 INFO ("network plugin: Unsigned packet or "
1357 "part has been ignored.");
1358 printed_ignore_warning = 1;
1360 buffer = ((char *) buffer) + pkg_length;
1363 #endif /* HAVE_LIBGCRYPT */
1364 else if (pkg_type == TYPE_VALUES)
1366 status = parse_part_values (&buffer, &buffer_size,
1367 &vl.values, &vl.values_len);
1371 network_dispatch_values (&vl, username);
1375 else if (pkg_type == TYPE_TIME)
1378 status = parse_part_number (&buffer, &buffer_size,
1382 vl.time = (time_t) tmp;
1383 n.time = (time_t) tmp;
1386 else if (pkg_type == TYPE_INTERVAL)
1389 status = parse_part_number (&buffer, &buffer_size,
1392 vl.interval = (int) tmp;
1394 else if (pkg_type == TYPE_HOST)
1396 status = parse_part_string (&buffer, &buffer_size,
1397 vl.host, sizeof (vl.host));
1399 sstrncpy (n.host, vl.host, sizeof (n.host));
1401 else if (pkg_type == TYPE_PLUGIN)
1403 status = parse_part_string (&buffer, &buffer_size,
1404 vl.plugin, sizeof (vl.plugin));
1406 sstrncpy (n.plugin, vl.plugin,
1409 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1411 status = parse_part_string (&buffer, &buffer_size,
1413 sizeof (vl.plugin_instance));
1415 sstrncpy (n.plugin_instance,
1417 sizeof (n.plugin_instance));
1419 else if (pkg_type == TYPE_TYPE)
1421 status = parse_part_string (&buffer, &buffer_size,
1422 vl.type, sizeof (vl.type));
1424 sstrncpy (n.type, vl.type, sizeof (n.type));
1426 else if (pkg_type == TYPE_TYPE_INSTANCE)
1428 status = parse_part_string (&buffer, &buffer_size,
1430 sizeof (vl.type_instance));
1432 sstrncpy (n.type_instance, vl.type_instance,
1433 sizeof (n.type_instance));
1435 else if (pkg_type == TYPE_MESSAGE)
1437 status = parse_part_string (&buffer, &buffer_size,
1438 n.message, sizeof (n.message));
1444 else if ((n.severity != NOTIF_FAILURE)
1445 && (n.severity != NOTIF_WARNING)
1446 && (n.severity != NOTIF_OKAY))
1448 INFO ("network plugin: "
1449 "Ignoring notification with "
1450 "unknown severity %i.",
1453 else if (n.time <= 0)
1455 INFO ("network plugin: "
1456 "Ignoring notification with "
1459 else if (strlen (n.message) <= 0)
1461 INFO ("network plugin: "
1462 "Ignoring notification with "
1463 "an empty message.");
1467 plugin_dispatch_notification (&n);
1470 else if (pkg_type == TYPE_SEVERITY)
1473 status = parse_part_number (&buffer, &buffer_size,
1476 n.severity = (int) tmp;
1480 DEBUG ("network plugin: parse_packet: Unknown part"
1481 " type: 0x%04hx", pkg_type);
1482 buffer = ((char *) buffer) + pkg_length;
1484 } /* while (buffer_size > sizeof (part_header_t)) */
1486 if (status == 0 && buffer_size > 0)
1487 WARNING ("network plugin: parse_packet: Received truncated "
1488 "packet, try increasing `MaxPacketSize'");
1491 } /* }}} int parse_packet */
1493 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1502 sfree (sec->username);
1503 sfree (sec->password);
1504 if (sec->cypher != NULL)
1505 gcry_cipher_close (sec->cypher);
1507 } /* }}} void free_sockent_client */
1509 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1513 for (i = 0; i < ses->fd_num; i++)
1515 if (ses->fd[i] >= 0)
1524 sfree (ses->auth_file);
1525 fbh_destroy (ses->userdb);
1526 if (ses->cypher != NULL)
1527 gcry_cipher_close (ses->cypher);
1529 } /* }}} void free_sockent_server */
1531 static void sockent_destroy (sockent_t *se) /* {{{ */
1535 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1542 sfree (se->service);
1544 if (se->type == SOCKENT_TYPE_CLIENT)
1545 free_sockent_client (&se->data.client);
1547 free_sockent_server (&se->data.server);
1552 } /* }}} void sockent_destroy */
1555 * int network_set_ttl
1557 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1558 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1560 * The `struct addrinfo' is used to destinguish between unicast and multicast
1563 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1565 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1566 network_config_ttl);
1568 assert (se->type == SOCKENT_TYPE_CLIENT);
1570 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1573 if (ai->ai_family == AF_INET)
1575 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1578 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1579 optname = IP_MULTICAST_TTL;
1583 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1584 &network_config_ttl,
1585 sizeof (network_config_ttl)) != 0)
1588 ERROR ("setsockopt: %s",
1589 sstrerror (errno, errbuf, sizeof (errbuf)));
1593 else if (ai->ai_family == AF_INET6)
1595 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1596 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1599 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1600 optname = IPV6_MULTICAST_HOPS;
1602 optname = IPV6_UNICAST_HOPS;
1604 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1605 &network_config_ttl,
1606 sizeof (network_config_ttl)) != 0)
1609 ERROR ("setsockopt: %s",
1610 sstrerror (errno, errbuf,
1617 } /* int network_set_ttl */
1619 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1621 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1624 assert (se->type == SOCKENT_TYPE_CLIENT);
1626 if (ai->ai_family == AF_INET)
1628 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1630 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1632 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1633 /* If possible, use the "ip_mreqn" structure which has
1634 * an "interface index" member. Using the interface
1635 * index is preferred here, because of its similarity
1636 * to the way IPv6 handles this. Unfortunately, it
1637 * appears not to be portable. */
1638 struct ip_mreqn mreq;
1640 memset (&mreq, 0, sizeof (mreq));
1641 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1642 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1643 mreq.imr_ifindex = se->interface;
1645 struct ip_mreq mreq;
1647 memset (&mreq, 0, sizeof (mreq));
1648 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1649 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1652 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1653 &mreq, sizeof (mreq)) != 0)
1656 ERROR ("setsockopt: %s",
1657 sstrerror (errno, errbuf, sizeof (errbuf)));
1664 else if (ai->ai_family == AF_INET6)
1666 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1668 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1670 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1672 sizeof (se->interface)) != 0)
1675 ERROR ("setsockopt: %s",
1676 sstrerror (errno, errbuf,
1685 /* else: Not a multicast interface. */
1686 if (se->interface != 0)
1688 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1689 char interface_name[IFNAMSIZ];
1691 if (if_indextoname (se->interface, interface_name) == NULL)
1694 DEBUG ("network plugin: Binding socket to interface %s", interface_name);
1696 if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
1698 sizeof(interface_name)) == -1 )
1701 ERROR ("setsockopt: %s",
1702 sstrerror (errno, errbuf, sizeof (errbuf)));
1705 /* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1708 WARNING ("network plugin: Cannot set the interface on a unicast "
1710 # if !defined(SO_BINDTODEVICE)
1711 "the \"SO_BINDTODEVICE\" socket option "
1713 "the \"if_indextoname\" function "
1715 "is not available on your system.");
1721 } /* }}} network_set_interface */
1723 static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
1728 /* allow multiple sockets to use the same PORT number */
1729 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1730 &yes, sizeof(yes)) == -1) {
1732 ERROR ("setsockopt: %s",
1733 sstrerror (errno, errbuf, sizeof (errbuf)));
1737 DEBUG ("fd = %i; calling `bind'", fd);
1739 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1743 sstrerror (errno, errbuf, sizeof (errbuf)));
1747 if (ai->ai_family == AF_INET)
1749 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1750 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1752 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1753 struct ip_mreqn mreq;
1755 struct ip_mreq mreq;
1758 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1760 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1761 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1762 /* Set the interface using the interface index if
1763 * possible (available). Unfortunately, the struct
1764 * ip_mreqn is not portable. */
1765 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1766 mreq.imr_ifindex = interface_idx;
1768 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1771 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1772 &loop, sizeof (loop)) == -1)
1775 ERROR ("setsockopt: %s",
1776 sstrerror (errno, errbuf,
1781 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1782 &mreq, sizeof (mreq)) == -1)
1785 ERROR ("setsockopt: %s",
1786 sstrerror (errno, errbuf,
1794 else if (ai->ai_family == AF_INET6)
1796 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1797 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1798 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1800 struct ipv6_mreq mreq;
1802 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1804 memcpy (&mreq.ipv6mr_multiaddr,
1806 sizeof (addr->sin6_addr));
1808 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1809 * ipv6mr_interface may be set to zeroes to
1810 * choose the default multicast interface or to
1811 * the index of a particular multicast-capable
1812 * interface if the host is multihomed.
1813 * Membership is associ-associated with a
1814 * single interface; programs running on
1815 * multihomed hosts may need to join the same
1816 * group on more than one interface.*/
1817 mreq.ipv6mr_interface = interface_idx;
1819 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1820 &loop, sizeof (loop)) == -1)
1823 ERROR ("setsockopt: %s",
1824 sstrerror (errno, errbuf,
1829 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1830 &mreq, sizeof (mreq)) == -1)
1833 ERROR ("setsockopt: %s",
1834 sstrerror (errno, errbuf,
1843 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1844 /* if a specific interface was set, bind the socket to it. But to avoid
1845 * possible problems with multicast routing, only do that for non-multicast
1847 if (interface_idx != 0)
1849 char interface_name[IFNAMSIZ];
1851 if (if_indextoname (interface_idx, interface_name) == NULL)
1854 DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
1856 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
1858 sizeof(interface_name)) == -1 )
1861 ERROR ("setsockopt: %s",
1862 sstrerror (errno, errbuf, sizeof (errbuf)));
1866 #endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1869 } /* int network_bind_socket */
1871 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
1872 * or `SOCKENT_TYPE_SERVER' */
1873 static int sockent_init (sockent_t *se, int type) /* {{{ */
1878 memset (se, 0, sizeof (*se));
1880 se->type = SOCKENT_TYPE_CLIENT;
1886 if (type == SOCKENT_TYPE_SERVER)
1888 se->type = SOCKENT_TYPE_SERVER;
1889 se->data.server.fd = NULL;
1891 se->data.server.security_level = SECURITY_LEVEL_NONE;
1892 se->data.server.auth_file = NULL;
1893 se->data.server.userdb = NULL;
1894 se->data.server.cypher = NULL;
1899 se->data.client.fd = -1;
1900 se->data.client.addr = NULL;
1902 se->data.client.security_level = SECURITY_LEVEL_NONE;
1903 se->data.client.username = NULL;
1904 se->data.client.password = NULL;
1905 se->data.client.cypher = NULL;
1910 } /* }}} int sockent_init */
1912 /* Open the file descriptors for a initialized sockent structure. */
1913 static int sockent_open (sockent_t *se) /* {{{ */
1915 struct addrinfo ai_hints;
1916 struct addrinfo *ai_list, *ai_ptr;
1920 const char *service;
1925 /* Set up the security structures. */
1926 #if HAVE_LIBGCRYPT /* {{{ */
1927 if (se->type == SOCKENT_TYPE_CLIENT)
1929 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
1931 if ((se->data.client.username == NULL)
1932 || (se->data.client.password == NULL))
1934 ERROR ("network plugin: Client socket with "
1935 "security requested, but no "
1936 "credentials are configured.");
1939 gcry_md_hash_buffer (GCRY_MD_SHA256,
1940 se->data.client.password_hash,
1941 se->data.client.password,
1942 strlen (se->data.client.password));
1945 else /* (se->type == SOCKENT_TYPE_SERVER) */
1947 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
1949 if (se->data.server.auth_file == NULL)
1951 ERROR ("network plugin: Server socket with "
1952 "security requested, but no "
1953 "password file is configured.");
1957 if (se->data.server.auth_file != NULL)
1959 se->data.server.userdb = fbh_create (se->data.server.auth_file);
1960 if (se->data.server.userdb == NULL)
1962 ERROR ("network plugin: Reading password file "
1964 se->data.server.auth_file);
1965 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
1970 #endif /* }}} HAVE_LIBGCRYPT */
1973 service = se->service;
1975 if (service == NULL)
1976 service = NET_DEFAULT_PORT;
1978 DEBUG ("network plugin: sockent_open: node = %s; service = %s;",
1981 memset (&ai_hints, 0, sizeof (ai_hints));
1982 ai_hints.ai_flags = 0;
1984 ai_hints.ai_flags |= AI_PASSIVE;
1986 #ifdef AI_ADDRCONFIG
1987 ai_hints.ai_flags |= AI_ADDRCONFIG;
1989 ai_hints.ai_family = AF_UNSPEC;
1990 ai_hints.ai_socktype = SOCK_DGRAM;
1991 ai_hints.ai_protocol = IPPROTO_UDP;
1993 ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
1996 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
1997 (se->node == NULL) ? "(null)" : se->node,
1998 (se->service == NULL) ? "(null)" : se->service,
1999 gai_strerror (ai_return));
2003 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2007 if (se->type == SOCKENT_TYPE_SERVER) /* {{{ */
2011 tmp = realloc (se->data.server.fd,
2012 sizeof (*tmp) * (se->data.server.fd_num + 1));
2015 ERROR ("network plugin: realloc failed.");
2018 se->data.server.fd = tmp;
2019 tmp = se->data.server.fd + se->data.server.fd_num;
2021 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
2022 ai_ptr->ai_protocol);
2026 ERROR ("network plugin: socket(2) failed: %s",
2027 sstrerror (errno, errbuf,
2032 status = network_bind_socket (*tmp, ai_ptr, se->interface);
2040 se->data.server.fd_num++;
2042 } /* }}} if (se->type == SOCKENT_TYPE_SERVER) */
2043 else /* if (se->type == SOCKENT_TYPE_CLIENT) {{{ */
2045 se->data.client.fd = socket (ai_ptr->ai_family,
2046 ai_ptr->ai_socktype,
2047 ai_ptr->ai_protocol);
2048 if (se->data.client.fd < 0)
2051 ERROR ("network plugin: socket(2) failed: %s",
2052 sstrerror (errno, errbuf,
2057 se->data.client.addr = malloc (sizeof (*se->data.client.addr));
2058 if (se->data.client.addr == NULL)
2060 ERROR ("network plugin: malloc failed.");
2061 close (se->data.client.fd);
2062 se->data.client.fd = -1;
2066 memset (se->data.client.addr, 0, sizeof (*se->data.client.addr));
2067 assert (sizeof (*se->data.client.addr) >= ai_ptr->ai_addrlen);
2068 memcpy (se->data.client.addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2069 se->data.client.addrlen = ai_ptr->ai_addrlen;
2071 network_set_ttl (se, ai_ptr);
2072 network_set_interface (se, ai_ptr);
2074 /* We don't open more than one write-socket per
2075 * node/service pair.. */
2077 } /* }}} if (se->type == SOCKENT_TYPE_CLIENT) */
2078 } /* for (ai_list) */
2080 freeaddrinfo (ai_list);
2082 /* Check if all went well. */
2083 if (se->type == SOCKENT_TYPE_SERVER)
2085 if (se->data.server.fd_num <= 0)
2088 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2090 if (se->data.client.fd < 0)
2095 } /* }}} int sockent_open */
2097 /* Add a sockent to the global list of sockets */
2098 static int sockent_add (sockent_t *se) /* {{{ */
2100 sockent_t *last_ptr;
2105 if (se->type == SOCKENT_TYPE_SERVER)
2110 tmp = realloc (listen_sockets_pollfd,
2111 sizeof (*tmp) * (listen_sockets_num
2112 + se->data.server.fd_num));
2115 ERROR ("network plugin: realloc failed.");
2118 listen_sockets_pollfd = tmp;
2119 tmp = listen_sockets_pollfd + listen_sockets_num;
2121 for (i = 0; i < se->data.server.fd_num; i++)
2123 memset (tmp + i, 0, sizeof (*tmp));
2124 tmp[i].fd = se->data.server.fd[i];
2125 tmp[i].events = POLLIN | POLLPRI;
2129 listen_sockets_num += se->data.server.fd_num;
2131 if (listen_sockets == NULL)
2133 listen_sockets = se;
2136 last_ptr = listen_sockets;
2138 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2140 if (sending_sockets == NULL)
2142 sending_sockets = se;
2145 last_ptr = sending_sockets;
2148 while (last_ptr->next != NULL)
2149 last_ptr = last_ptr->next;
2150 last_ptr->next = se;
2153 } /* }}} int sockent_add */
2155 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
2159 receive_list_entry_t *ent;
2162 /* Lock and wait for more data to come in */
2163 pthread_mutex_lock (&receive_list_lock);
2164 while ((listen_loop == 0)
2165 && (receive_list_head == NULL))
2166 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
2168 /* Remove the head entry and unlock */
2169 ent = receive_list_head;
2171 receive_list_head = ent->next;
2172 receive_list_length--;
2173 pthread_mutex_unlock (&receive_list_lock);
2175 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2176 * because we dispatch all missing packets before shutting down. */
2180 /* Look for the correct `sockent_t' */
2181 se = listen_sockets;
2186 for (i = 0; i < se->data.server.fd_num; i++)
2187 if (se->data.server.fd[i] == ent->fd)
2190 if (i < se->data.server.fd_num)
2198 ERROR ("network plugin: Got packet from FD %i, but can't "
2199 "find an appropriate socket entry.",
2206 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0,
2207 /* username = */ NULL);
2213 } /* }}} void *dispatch_thread */
2215 static int network_receive (void) /* {{{ */
2217 char buffer[network_config_packet_size];
2223 receive_list_entry_t *private_list_head;
2224 receive_list_entry_t *private_list_tail;
2225 uint64_t private_list_length;
2227 assert (listen_sockets_num > 0);
2229 private_list_head = NULL;
2230 private_list_tail = NULL;
2231 private_list_length = 0;
2233 while (listen_loop == 0)
2235 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2242 ERROR ("poll failed: %s",
2243 sstrerror (errno, errbuf, sizeof (errbuf)));
2247 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2249 receive_list_entry_t *ent;
2251 if ((listen_sockets_pollfd[i].revents
2252 & (POLLIN | POLLPRI)) == 0)
2256 buffer_len = recv (listen_sockets_pollfd[i].fd,
2257 buffer, sizeof (buffer),
2262 ERROR ("recv failed: %s",
2263 sstrerror (errno, errbuf,
2268 stats_octets_rx += ((uint64_t) buffer_len);
2271 /* TODO: Possible performance enhancement: Do not free
2272 * these entries in the dispatch thread but put them in
2273 * another list, so we don't have to allocate more and
2274 * more of these structures. */
2275 ent = malloc (sizeof (receive_list_entry_t));
2278 ERROR ("network plugin: malloc failed.");
2281 memset (ent, 0, sizeof (receive_list_entry_t));
2282 ent->data = malloc (network_config_packet_size);
2283 if (ent->data == NULL)
2286 ERROR ("network plugin: malloc failed.");
2289 ent->fd = listen_sockets_pollfd[i].fd;
2292 memcpy (ent->data, buffer, buffer_len);
2293 ent->data_len = buffer_len;
2295 if (private_list_head == NULL)
2296 private_list_head = ent;
2298 private_list_tail->next = ent;
2299 private_list_tail = ent;
2300 private_list_length++;
2302 /* Do not block here. Blocking here has led to
2303 * insufficient performance in the past. */
2304 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2306 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2307 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2309 if (receive_list_head == NULL)
2310 receive_list_head = private_list_head;
2312 receive_list_tail->next = private_list_head;
2313 receive_list_tail = private_list_tail;
2314 receive_list_length += private_list_length;
2316 pthread_cond_signal (&receive_list_cond);
2317 pthread_mutex_unlock (&receive_list_lock);
2319 private_list_head = NULL;
2320 private_list_tail = NULL;
2321 private_list_length = 0;
2323 } /* for (listen_sockets_pollfd) */
2324 } /* while (listen_loop == 0) */
2326 /* Make sure everything is dispatched before exiting. */
2327 if (private_list_head != NULL)
2329 pthread_mutex_lock (&receive_list_lock);
2331 if (receive_list_head == NULL)
2332 receive_list_head = private_list_head;
2334 receive_list_tail->next = private_list_head;
2335 receive_list_tail = private_list_tail;
2336 receive_list_length += private_list_length;
2338 private_list_head = NULL;
2339 private_list_tail = NULL;
2340 private_list_length = 0;
2342 pthread_cond_signal (&receive_list_cond);
2343 pthread_mutex_unlock (&receive_list_lock);
2347 } /* }}} int network_receive */
2349 static void *receive_thread (void __attribute__((unused)) *arg)
2351 return (network_receive () ? (void *) 1 : (void *) 0);
2352 } /* void *receive_thread */
2354 static void network_init_buffer (void)
2356 memset (send_buffer, 0, network_config_packet_size);
2357 send_buffer_ptr = send_buffer;
2358 send_buffer_fill = 0;
2360 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2361 } /* int network_init_buffer */
2363 static void networt_send_buffer_plain (const sockent_t *se, /* {{{ */
2364 const char *buffer, size_t buffer_size)
2370 status = sendto (se->data.client.fd, buffer, buffer_size,
2372 (struct sockaddr *) se->data.client.addr,
2373 se->data.client.addrlen);
2379 ERROR ("network plugin: sendto failed: %s",
2380 sstrerror (errno, errbuf,
2387 } /* }}} void networt_send_buffer_plain */
2390 #define BUFFER_ADD(p,s) do { \
2391 memcpy (buffer + buffer_offset, (p), (s)); \
2392 buffer_offset += (s); \
2395 static void networt_send_buffer_signed (const sockent_t *se, /* {{{ */
2396 const char *in_buffer, size_t in_buffer_size)
2398 part_signature_sha256_t ps;
2399 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2400 size_t buffer_offset;
2401 size_t username_len;
2405 unsigned char *hash;
2408 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2411 ERROR ("network plugin: Creating HMAC object failed: %s",
2412 gcry_strerror (err));
2416 err = gcry_md_setkey (hd, se->data.client.password,
2417 strlen (se->data.client.password));
2420 ERROR ("network plugin: gcry_md_setkey failed: %s",
2421 gcry_strerror (err));
2426 username_len = strlen (se->data.client.username);
2427 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2429 ERROR ("network plugin: Username too long: %s",
2430 se->data.client.username);
2434 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2435 se->data.client.username, username_len);
2436 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2437 in_buffer, in_buffer_size);
2439 /* Initialize the `ps' structure. */
2440 memset (&ps, 0, sizeof (ps));
2441 ps.head.type = htons (TYPE_SIGN_SHA256);
2442 ps.head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len);
2444 /* Calculate the hash value. */
2445 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2446 username_len + in_buffer_size);
2447 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2450 ERROR ("network plugin: gcry_md_read failed.");
2454 memcpy (ps.hash, hash, sizeof (ps.hash));
2456 /* Add the header */
2459 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2460 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2461 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2463 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2468 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2469 networt_send_buffer_plain (se, buffer, buffer_offset);
2470 } /* }}} void networt_send_buffer_signed */
2472 static void networt_send_buffer_encrypted (sockent_t *se, /* {{{ */
2473 const char *in_buffer, size_t in_buffer_size)
2475 part_encryption_aes256_t pea;
2476 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2478 size_t buffer_offset;
2480 size_t username_len;
2482 gcry_cipher_hd_t cypher;
2484 /* Initialize the header fields */
2485 memset (&pea, 0, sizeof (pea));
2486 pea.head.type = htons (TYPE_ENCR_AES256);
2488 pea.username = se->data.client.username;
2490 username_len = strlen (pea.username);
2491 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2493 ERROR ("network plugin: Username too long: %s", pea.username);
2497 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2498 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2499 - sizeof (pea.hash);
2501 assert (buffer_size <= sizeof (buffer));
2502 DEBUG ("network plugin: networt_send_buffer_encrypted: "
2503 "buffer_size = %zu;", buffer_size);
2505 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2506 + username_len + in_buffer_size));
2507 pea.username_length = htons ((uint16_t) username_len);
2509 /* Chose a random initialization vector. */
2510 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2512 /* Create hash of the payload */
2513 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2515 /* Initialize the buffer */
2517 memset (buffer, 0, sizeof (buffer));
2520 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2521 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2522 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2523 BUFFER_ADD (pea.username, username_len);
2524 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2525 assert (buffer_offset == header_size);
2526 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2527 BUFFER_ADD (in_buffer, in_buffer_size);
2529 assert (buffer_offset == buffer_size);
2531 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2532 se->data.client.password);
2536 /* Encrypt the buffer in-place */
2537 err = gcry_cipher_encrypt (cypher,
2538 buffer + header_size,
2539 buffer_size - header_size,
2540 /* in = */ NULL, /* in len = */ 0);
2543 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2544 gcry_strerror (err));
2548 /* Send it out without further modifications */
2549 networt_send_buffer_plain (se, buffer, buffer_size);
2550 } /* }}} void networt_send_buffer_encrypted */
2552 #endif /* HAVE_LIBGCRYPT */
2554 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2558 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2560 for (se = sending_sockets; se != NULL; se = se->next)
2563 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2564 networt_send_buffer_encrypted (se, buffer, buffer_len);
2565 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2566 networt_send_buffer_signed (se, buffer, buffer_len);
2567 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2568 #endif /* HAVE_LIBGCRYPT */
2569 networt_send_buffer_plain (se, buffer, buffer_len);
2570 } /* for (sending_sockets) */
2571 } /* }}} void network_send_buffer */
2573 static int add_to_buffer (char *buffer, int buffer_size, /* {{{ */
2574 value_list_t *vl_def,
2575 const data_set_t *ds, const value_list_t *vl)
2577 char *buffer_orig = buffer;
2579 if (strcmp (vl_def->host, vl->host) != 0)
2581 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2582 vl->host, strlen (vl->host)) != 0)
2584 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2587 if (vl_def->time != vl->time)
2589 if (write_part_number (&buffer, &buffer_size, TYPE_TIME,
2590 (uint64_t) vl->time))
2592 vl_def->time = vl->time;
2595 if (vl_def->interval != vl->interval)
2597 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL,
2598 (uint64_t) vl->interval))
2600 vl_def->interval = vl->interval;
2603 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2605 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2606 vl->plugin, strlen (vl->plugin)) != 0)
2608 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2611 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2613 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2614 vl->plugin_instance,
2615 strlen (vl->plugin_instance)) != 0)
2617 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2620 if (strcmp (vl_def->type, vl->type) != 0)
2622 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2623 vl->type, strlen (vl->type)) != 0)
2625 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2628 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2630 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2632 strlen (vl->type_instance)) != 0)
2634 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2637 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2640 return (buffer - buffer_orig);
2641 } /* }}} int add_to_buffer */
2643 static void flush_buffer (void)
2645 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2648 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2650 stats_octets_tx += ((uint64_t) send_buffer_fill);
2653 network_init_buffer ();
2656 static int network_write (const data_set_t *ds, const value_list_t *vl,
2657 user_data_t __attribute__((unused)) *user_data)
2661 if (!check_send_okay (vl))
2664 char name[6*DATA_MAX_NAME_LEN];
2665 FORMAT_VL (name, sizeof (name), vl);
2666 name[sizeof (name) - 1] = 0;
2667 DEBUG ("network plugin: network_write: "
2668 "NOT sending %s.", name);
2670 /* Counter is not protected by another lock and may be reached by
2671 * multiple threads */
2672 pthread_mutex_lock (&stats_lock);
2673 stats_values_not_sent++;
2674 pthread_mutex_unlock (&stats_lock);
2678 uc_meta_data_add_unsigned_int (vl,
2679 "network:time_sent", (uint64_t) vl->time);
2681 pthread_mutex_lock (&send_buffer_lock);
2683 status = add_to_buffer (send_buffer_ptr,
2684 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2689 /* status == bytes added to the buffer */
2690 send_buffer_fill += status;
2691 send_buffer_ptr += status;
2693 stats_values_sent++;
2699 status = add_to_buffer (send_buffer_ptr,
2700 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2706 send_buffer_fill += status;
2707 send_buffer_ptr += status;
2709 stats_values_sent++;
2715 ERROR ("network plugin: Unable to append to the "
2716 "buffer for some weird reason");
2718 else if ((network_config_packet_size - send_buffer_fill) < 15)
2723 pthread_mutex_unlock (&send_buffer_lock);
2725 return ((status < 0) ? -1 : 0);
2726 } /* int network_write */
2728 static int network_config_set_boolean (const oconfig_item_t *ci, /* {{{ */
2731 if ((ci->values_num != 1)
2732 || ((ci->values[0].type != OCONFIG_TYPE_BOOLEAN)
2733 && (ci->values[0].type != OCONFIG_TYPE_STRING)))
2735 ERROR ("network plugin: The `%s' config option needs "
2736 "exactly one boolean argument.", ci->key);
2740 if (ci->values[0].type == OCONFIG_TYPE_BOOLEAN)
2742 if (ci->values[0].value.boolean)
2749 char *str = ci->values[0].value.string;
2753 else if (IS_FALSE (str))
2757 ERROR ("network plugin: Cannot parse string value `%s' of the `%s' "
2758 "option as boolean value.",
2765 } /* }}} int network_config_set_boolean */
2767 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2770 if ((ci->values_num != 1)
2771 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2773 WARNING ("network plugin: The `TimeToLive' config option needs exactly "
2774 "one numeric argument.");
2778 tmp = (int) ci->values[0].value.number;
2779 if ((tmp > 0) && (tmp <= 255))
2780 network_config_ttl = tmp;
2783 } /* }}} int network_config_set_ttl */
2785 static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
2788 if ((ci->values_num != 1)
2789 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2791 WARNING ("network plugin: The `Interface' config option needs exactly "
2792 "one string argument.");
2796 if (interface == NULL)
2799 *interface = if_nametoindex (ci->values[0].value.string);
2802 } /* }}} int network_config_set_interface */
2804 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
2807 if ((ci->values_num != 1)
2808 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2810 WARNING ("network plugin: The `MaxPacketSize' config option needs exactly "
2811 "one numeric argument.");
2815 tmp = (int) ci->values[0].value.number;
2816 if ((tmp >= 1024) && (tmp <= 65535))
2817 network_config_packet_size = tmp;
2820 } /* }}} int network_config_set_buffer_size */
2823 static int network_config_set_string (const oconfig_item_t *ci, /* {{{ */
2827 if ((ci->values_num != 1)
2828 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2830 WARNING ("network plugin: The `%s' config option needs exactly "
2831 "one string argument.", ci->key);
2835 tmp = strdup (ci->values[0].value.string);
2839 sfree (*ret_string);
2843 } /* }}} int network_config_set_string */
2844 #endif /* HAVE_LIBGCRYPT */
2847 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
2851 if ((ci->values_num != 1)
2852 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2854 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
2855 "one string argument.");
2859 str = ci->values[0].value.string;
2860 if (strcasecmp ("Encrypt", str) == 0)
2861 *retval = SECURITY_LEVEL_ENCRYPT;
2862 else if (strcasecmp ("Sign", str) == 0)
2863 *retval = SECURITY_LEVEL_SIGN;
2864 else if (strcasecmp ("None", str) == 0)
2865 *retval = SECURITY_LEVEL_NONE;
2868 WARNING ("network plugin: Unknown security level: %s.", str);
2873 } /* }}} int network_config_set_security_level */
2874 #endif /* HAVE_LIBGCRYPT */
2876 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
2882 if ((ci->values_num < 1) || (ci->values_num > 2)
2883 || (ci->values[0].type != OCONFIG_TYPE_STRING)
2884 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
2886 ERROR ("network plugin: The `%s' config option needs "
2887 "one or two string arguments.", ci->key);
2891 se = malloc (sizeof (*se));
2894 ERROR ("network plugin: malloc failed.");
2897 sockent_init (se, SOCKENT_TYPE_SERVER);
2899 se->node = strdup (ci->values[0].value.string);
2900 if (ci->values_num >= 2)
2901 se->service = strdup (ci->values[1].value.string);
2903 for (i = 0; i < ci->children_num; i++)
2905 oconfig_item_t *child = ci->children + i;
2908 if (strcasecmp ("AuthFile", child->key) == 0)
2909 network_config_set_string (child, &se->data.server.auth_file);
2910 else if (strcasecmp ("SecurityLevel", child->key) == 0)
2911 network_config_set_security_level (child,
2912 &se->data.server.security_level);
2914 #endif /* HAVE_LIBGCRYPT */
2915 if (strcasecmp ("Interface", child->key) == 0)
2916 network_config_set_interface (child,
2920 WARNING ("network plugin: Option `%s' is not allowed here.",
2926 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
2927 && (se->data.server.auth_file == NULL))
2929 ERROR ("network plugin: A security level higher than `none' was "
2930 "requested, but no AuthFile option was given. Cowardly refusing to "
2931 "open this socket!");
2932 sockent_destroy (se);
2935 #endif /* HAVE_LIBGCRYPT */
2937 status = sockent_open (se);
2940 ERROR ("network plugin: network_config_add_listen: sockent_open failed.");
2941 sockent_destroy (se);
2945 status = sockent_add (se);
2948 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
2949 sockent_destroy (se);
2954 } /* }}} int network_config_add_listen */
2956 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
2962 if ((ci->values_num < 1) || (ci->values_num > 2)
2963 || (ci->values[0].type != OCONFIG_TYPE_STRING)
2964 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
2966 ERROR ("network plugin: The `%s' config option needs "
2967 "one or two string arguments.", ci->key);
2971 se = malloc (sizeof (*se));
2974 ERROR ("network plugin: malloc failed.");
2977 sockent_init (se, SOCKENT_TYPE_CLIENT);
2979 se->node = strdup (ci->values[0].value.string);
2980 if (ci->values_num >= 2)
2981 se->service = strdup (ci->values[1].value.string);
2983 for (i = 0; i < ci->children_num; i++)
2985 oconfig_item_t *child = ci->children + i;
2988 if (strcasecmp ("Username", child->key) == 0)
2989 network_config_set_string (child, &se->data.client.username);
2990 else if (strcasecmp ("Password", child->key) == 0)
2991 network_config_set_string (child, &se->data.client.password);
2992 else if (strcasecmp ("SecurityLevel", child->key) == 0)
2993 network_config_set_security_level (child,
2994 &se->data.client.security_level);
2996 #endif /* HAVE_LIBGCRYPT */
2997 if (strcasecmp ("Interface", child->key) == 0)
2998 network_config_set_interface (child,
3002 WARNING ("network plugin: Option `%s' is not allowed here.",
3008 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
3009 && ((se->data.client.username == NULL)
3010 || (se->data.client.password == NULL)))
3012 ERROR ("network plugin: A security level higher than `none' was "
3013 "requested, but no Username or Password option was given. "
3014 "Cowardly refusing to open this socket!");
3015 sockent_destroy (se);
3018 #endif /* HAVE_LIBGCRYPT */
3020 status = sockent_open (se);
3023 ERROR ("network plugin: network_config_add_server: sockent_open failed.");
3024 sockent_destroy (se);
3028 status = sockent_add (se);
3031 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
3032 sockent_destroy (se);
3037 } /* }}} int network_config_add_server */
3039 static int network_config (oconfig_item_t *ci) /* {{{ */
3043 for (i = 0; i < ci->children_num; i++)
3045 oconfig_item_t *child = ci->children + i;
3047 if (strcasecmp ("Listen", child->key) == 0)
3048 network_config_add_listen (child);
3049 else if (strcasecmp ("Server", child->key) == 0)
3050 network_config_add_server (child);
3051 else if (strcasecmp ("TimeToLive", child->key) == 0)
3052 network_config_set_ttl (child);
3053 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
3054 network_config_set_buffer_size (child);
3055 else if (strcasecmp ("Forward", child->key) == 0)
3056 network_config_set_boolean (child, &network_config_forward);
3057 else if (strcasecmp ("ReportStats", child->key) == 0)
3058 network_config_set_boolean (child, &network_config_stats);
3059 else if (strcasecmp ("CacheFlush", child->key) == 0)
3060 /* no op for backwards compatibility only */;
3063 WARNING ("network plugin: Option `%s' is not allowed here.",
3069 } /* }}} int network_config */
3071 static int network_notification (const notification_t *n,
3072 user_data_t __attribute__((unused)) *user_data)
3074 char buffer[network_config_packet_size];
3075 char *buffer_ptr = buffer;
3076 int buffer_free = sizeof (buffer);
3079 memset (buffer, '\0', sizeof (buffer));
3082 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME,
3083 (uint64_t) n->time);
3087 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
3088 (uint64_t) n->severity);
3092 if (strlen (n->host) > 0)
3094 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
3095 n->host, strlen (n->host));
3100 if (strlen (n->plugin) > 0)
3102 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
3103 n->plugin, strlen (n->plugin));
3108 if (strlen (n->plugin_instance) > 0)
3110 status = write_part_string (&buffer_ptr, &buffer_free,
3111 TYPE_PLUGIN_INSTANCE,
3112 n->plugin_instance, strlen (n->plugin_instance));
3117 if (strlen (n->type) > 0)
3119 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3120 n->type, strlen (n->type));
3125 if (strlen (n->type_instance) > 0)
3127 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3128 n->type_instance, strlen (n->type_instance));
3133 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3134 n->message, strlen (n->message));
3138 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3141 } /* int network_notification */
3143 static int network_shutdown (void)
3147 /* Kill the listening thread */
3148 if (receive_thread_running != 0)
3150 INFO ("network plugin: Stopping receive thread.");
3151 pthread_kill (receive_thread_id, SIGTERM);
3152 pthread_join (receive_thread_id, NULL /* no return value */);
3153 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3154 receive_thread_running = 0;
3157 /* Shutdown the dispatching thread */
3158 if (dispatch_thread_running != 0)
3160 INFO ("network plugin: Stopping dispatch thread.");
3161 pthread_mutex_lock (&receive_list_lock);
3162 pthread_cond_broadcast (&receive_list_cond);
3163 pthread_mutex_unlock (&receive_list_lock);
3164 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3165 dispatch_thread_running = 0;
3168 sockent_destroy (listen_sockets);
3170 if (send_buffer_fill > 0)
3173 sfree (send_buffer);
3175 /* TODO: Close `sending_sockets' */
3177 plugin_unregister_config ("network");
3178 plugin_unregister_init ("network");
3179 plugin_unregister_write ("network");
3180 plugin_unregister_shutdown ("network");
3183 } /* int network_shutdown */
3185 static int network_stats_read (void) /* {{{ */
3187 uint64_t copy_octets_rx;
3188 uint64_t copy_octets_tx;
3189 uint64_t copy_packets_rx;
3190 uint64_t copy_packets_tx;
3191 uint64_t copy_values_dispatched;
3192 uint64_t copy_values_not_dispatched;
3193 uint64_t copy_values_sent;
3194 uint64_t copy_values_not_sent;
3195 uint64_t copy_receive_list_length;
3196 value_list_t vl = VALUE_LIST_INIT;
3199 copy_octets_rx = stats_octets_rx;
3200 copy_octets_tx = stats_octets_tx;
3201 copy_packets_rx = stats_packets_rx;
3202 copy_packets_tx = stats_packets_tx;
3203 copy_values_dispatched = stats_values_dispatched;
3204 copy_values_not_dispatched = stats_values_not_dispatched;
3205 copy_values_sent = stats_values_sent;
3206 copy_values_not_sent = stats_values_not_sent;
3207 copy_receive_list_length = receive_list_length;
3209 /* Initialize `vl' */
3213 vl.interval = interval_g;
3214 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3215 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3217 /* Octets received / sent */
3218 vl.values[0].counter = (counter_t) copy_octets_rx;
3219 vl.values[1].counter = (counter_t) copy_octets_tx;
3220 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3221 plugin_dispatch_values_secure (&vl);
3223 /* Packets received / send */
3224 vl.values[0].counter = (counter_t) copy_packets_rx;
3225 vl.values[1].counter = (counter_t) copy_packets_tx;
3226 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3227 plugin_dispatch_values_secure (&vl);
3229 /* Values (not) dispatched and (not) send */
3230 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3233 vl.values[0].derive = (derive_t) copy_values_dispatched;
3234 sstrncpy (vl.type_instance, "dispatch-accepted",
3235 sizeof (vl.type_instance));
3236 plugin_dispatch_values_secure (&vl);
3238 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3239 sstrncpy (vl.type_instance, "dispatch-rejected",
3240 sizeof (vl.type_instance));
3241 plugin_dispatch_values_secure (&vl);
3243 vl.values[0].derive = (derive_t) copy_values_sent;
3244 sstrncpy (vl.type_instance, "send-accepted",
3245 sizeof (vl.type_instance));
3246 plugin_dispatch_values_secure (&vl);
3248 vl.values[0].derive = (derive_t) copy_values_not_sent;
3249 sstrncpy (vl.type_instance, "send-rejected",
3250 sizeof (vl.type_instance));
3251 plugin_dispatch_values_secure (&vl);
3253 /* Receive queue length */
3254 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3255 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3256 vl.type_instance[0] = 0;
3257 plugin_dispatch_values_secure (&vl);
3260 } /* }}} int network_stats_read */
3262 static int network_init (void)
3264 static _Bool have_init = false;
3266 /* Check if we were already initialized. If so, just return - there's
3267 * nothing more to do (for now, that is). */
3273 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
3274 gcry_control (GCRYCTL_INIT_SECMEM, 32768, 0);
3275 gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
3278 if (network_config_stats != 0)
3279 plugin_register_read ("network", network_stats_read);
3281 plugin_register_shutdown ("network", network_shutdown);
3283 send_buffer = malloc (network_config_packet_size);
3284 if (send_buffer == NULL)
3286 ERROR ("network plugin: malloc failed.");
3289 network_init_buffer ();
3291 /* setup socket(s) and so on */
3292 if (sending_sockets != NULL)
3294 plugin_register_write ("network", network_write,
3295 /* user_data = */ NULL);
3296 plugin_register_notification ("network", network_notification,
3297 /* user_data = */ NULL);
3300 /* If no threads need to be started, return here. */
3301 if ((listen_sockets_num == 0)
3302 || ((dispatch_thread_running != 0)
3303 && (receive_thread_running != 0)))
3306 if (dispatch_thread_running == 0)
3309 status = pthread_create (&dispatch_thread_id,
3310 NULL /* no attributes */,
3312 NULL /* no argument */);
3316 ERROR ("network: pthread_create failed: %s",
3317 sstrerror (errno, errbuf,
3322 dispatch_thread_running = 1;
3326 if (receive_thread_running == 0)
3329 status = pthread_create (&receive_thread_id,
3330 NULL /* no attributes */,
3332 NULL /* no argument */);
3336 ERROR ("network: pthread_create failed: %s",
3337 sstrerror (errno, errbuf,
3342 receive_thread_running = 1;
3347 } /* int network_init */
3350 * The flush option of the network plugin cannot flush individual identifiers.
3351 * All the values are added to a buffer and sent when the buffer is full, the
3352 * requested value may or may not be in there, it's not worth finding out. We
3353 * just send the buffer if `flush' is called - if the requested value was in
3354 * there, good. If not, well, then there is nothing to flush.. -octo
3356 static int network_flush (int timeout,
3357 const char __attribute__((unused)) *identifier,
3358 user_data_t __attribute__((unused)) *user_data)
3360 pthread_mutex_lock (&send_buffer_lock);
3362 if (send_buffer_fill > 0)
3365 pthread_mutex_unlock (&send_buffer_lock);
3368 } /* int network_flush */
3370 void module_register (void)
3372 plugin_register_complex_config ("network", network_config);
3373 plugin_register_init ("network", network_init);
3374 plugin_register_flush ("network", network_flush,
3375 /* user_data = */ NULL);
3376 } /* void module_register */
3378 /* vim: set fdm=marker : */