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"
41 # include <sys/socket.h>
47 # include <netinet/in.h>
50 # include <arpa/inet.h>
61 GCRY_THREAD_OPTION_PTHREAD_IMPL;
64 #ifndef IPV6_ADD_MEMBERSHIP
65 # ifdef IPV6_JOIN_GROUP
66 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
68 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
70 #endif /* !IP_ADD_MEMBERSHIP */
73 * Maximum size required for encryption / signing:
75 * 42 bytes for the encryption header
76 * + 64 bytes for the username
80 #define BUFF_SIG_SIZE 106
85 #define SECURITY_LEVEL_NONE 0
87 # define SECURITY_LEVEL_SIGN 1
88 # define SECURITY_LEVEL_ENCRYPT 2
93 struct sockaddr_storage *addr;
99 gcry_cipher_hd_t cypher;
100 unsigned char password_hash[32];
104 struct sockent_server
112 gcry_cipher_hd_t cypher;
116 typedef struct sockent
118 #define SOCKENT_TYPE_CLIENT 1
119 #define SOCKENT_TYPE_SERVER 2
128 struct sockent_client client;
129 struct sockent_server server;
132 struct sockent *next;
135 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
136 * 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
137 * +-------+-----------------------+-------------------------------+
138 * ! Ver. ! ! Length !
139 * +-------+-----------------------+-------------------------------+
146 typedef struct part_header_s part_header_t;
148 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
149 * 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
150 * +-------------------------------+-------------------------------+
152 * +-------------------------------+-------------------------------+
153 * : (Length - 4) Bytes :
154 * +---------------------------------------------------------------+
161 typedef struct part_string_s part_string_t;
163 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
164 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
165 * +-------------------------------+-------------------------------+
167 * +-------------------------------+-------------------------------+
168 * : (Length - 4 == 2 || 4 || 8) Bytes :
169 * +---------------------------------------------------------------+
176 typedef struct part_number_s part_number_t;
178 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
179 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
180 * +-------------------------------+-------------------------------+
182 * +-------------------------------+---------------+---------------+
183 * ! Num of values ! Type0 ! Type1 !
184 * +-------------------------------+---------------+---------------+
187 * +---------------------------------------------------------------+
190 * +---------------------------------------------------------------+
195 uint16_t *num_values;
196 uint8_t *values_types;
199 typedef struct part_values_s part_values_t;
201 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
202 * 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
203 * +-------------------------------+-------------------------------+
205 * +-------------------------------+-------------------------------+
206 * ! Hash (Bits 0 - 31) !
208 * ! Hash (Bits 224 - 255) !
209 * +---------------------------------------------------------------+
212 #define PART_SIGNATURE_SHA256_SIZE 36
213 struct part_signature_sha256_s
216 unsigned char hash[32];
219 typedef struct part_signature_sha256_s part_signature_sha256_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 * ! Original length ! Padding (0 - 15 bytes) !
227 * +-------------------------------+-------------------------------+
228 * ! Hash (Bits 0 - 31) !
230 * ! Hash (Bits 128 - 159) !
231 * +---------------------------------------------------------------+
234 #define PART_ENCRYPTION_AES256_SIZE 42
235 struct part_encryption_aes256_s
238 uint16_t username_length;
240 unsigned char iv[16];
242 unsigned char hash[20];
246 typedef struct part_encryption_aes256_s part_encryption_aes256_t;
248 struct receive_list_entry_s
253 struct receive_list_entry_s *next;
255 typedef struct receive_list_entry_s receive_list_entry_t;
260 static int network_config_ttl = 0;
261 static size_t network_config_packet_size = 1024;
262 static int network_config_forward = 0;
263 static int network_config_stats = 0;
265 static sockent_t *sending_sockets = NULL;
267 static receive_list_entry_t *receive_list_head = NULL;
268 static receive_list_entry_t *receive_list_tail = NULL;
269 static pthread_mutex_t receive_list_lock = PTHREAD_MUTEX_INITIALIZER;
270 static pthread_cond_t receive_list_cond = PTHREAD_COND_INITIALIZER;
271 static uint64_t receive_list_length = 0;
273 static sockent_t *listen_sockets = NULL;
274 static struct pollfd *listen_sockets_pollfd = NULL;
275 static size_t listen_sockets_num = 0;
277 /* The receive and dispatch threads will run as long as `listen_loop' is set to
279 static int listen_loop = 0;
280 static int receive_thread_running = 0;
281 static pthread_t receive_thread_id;
282 static int dispatch_thread_running = 0;
283 static pthread_t dispatch_thread_id;
285 /* Buffer in which to-be-sent network packets are constructed. */
286 static char *send_buffer;
287 static char *send_buffer_ptr;
288 static int send_buffer_fill;
289 static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
290 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
292 /* XXX: These counters are incremented from one place only. The spot in which
293 * the values are incremented is either only reachable by one thread (the
294 * dispatch thread, for example) or locked by some lock (send_buffer_lock for
295 * example). Only if neither is true, the stats_lock is acquired. The counters
296 * are always read without holding a lock in the hope that writing 8 bytes to
297 * memory is an atomic operation. */
298 static uint64_t stats_octets_rx = 0;
299 static uint64_t stats_octets_tx = 0;
300 static uint64_t stats_packets_rx = 0;
301 static uint64_t stats_packets_tx = 0;
302 static uint64_t stats_values_dispatched = 0;
303 static uint64_t stats_values_not_dispatched = 0;
304 static uint64_t stats_values_sent = 0;
305 static uint64_t stats_values_not_sent = 0;
306 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
311 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
313 uint64_t time_sent = 0;
316 status = uc_meta_data_get_unsigned_int (vl,
317 "network:time_sent", &time_sent);
319 /* This is a value we already sent. Don't allow it to be received again in
320 * order to avoid looping. */
321 if ((status == 0) && (time_sent >= ((uint64_t) vl->time)))
325 } /* }}} _Bool check_receive_okay */
327 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
329 _Bool received = false;
332 if (network_config_forward != 0)
335 if (vl->meta == NULL)
338 status = meta_data_get_boolean (vl->meta, "network:received", &received);
339 if (status == -ENOENT)
341 else if (status != 0)
343 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
344 "with status %i.", status);
348 /* By default, only *send* value lists that were not *received* by the
351 } /* }}} _Bool check_send_okay */
353 static int network_dispatch_values (value_list_t *vl) /* {{{ */
358 || (strlen (vl->host) <= 0)
359 || (strlen (vl->plugin) <= 0)
360 || (strlen (vl->type) <= 0))
363 if (!check_receive_okay (vl))
366 char name[6*DATA_MAX_NAME_LEN];
367 FORMAT_VL (name, sizeof (name), vl);
368 name[sizeof (name) - 1] = 0;
369 DEBUG ("network plugin: network_dispatch_values: "
370 "NOT dispatching %s.", name);
372 stats_values_not_dispatched++;
376 assert (vl->meta == NULL);
378 vl->meta = meta_data_create ();
379 if (vl->meta == NULL)
381 ERROR ("network plugin: meta_data_create failed.");
385 status = meta_data_add_boolean (vl->meta, "network:received", true);
388 ERROR ("network plugin: meta_data_add_boolean failed.");
389 meta_data_destroy (vl->meta);
394 plugin_dispatch_values (vl);
395 stats_values_dispatched++;
397 meta_data_destroy (vl->meta);
401 } /* }}} int network_dispatch_values */
404 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
405 const void *iv, size_t iv_size, const char *username)
408 gcry_cipher_hd_t *cyper_ptr;
409 unsigned char password_hash[32];
411 if (se->type == SOCKENT_TYPE_CLIENT)
413 cyper_ptr = &se->data.client.cypher;
414 memcpy (password_hash, se->data.client.password_hash,
415 sizeof (password_hash));
421 cyper_ptr = &se->data.server.cypher;
423 if (username == NULL)
426 secret = fbh_get (se->data.server.userdb, username);
430 gcry_md_hash_buffer (GCRY_MD_SHA256,
432 secret, strlen (secret));
437 if (*cyper_ptr == NULL)
439 err = gcry_cipher_open (cyper_ptr,
440 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
443 ERROR ("network plugin: gcry_cipher_open returned: %s",
444 gcry_strerror (err));
451 gcry_cipher_reset (*cyper_ptr);
453 assert (*cyper_ptr != NULL);
455 err = gcry_cipher_setkey (*cyper_ptr,
456 password_hash, sizeof (password_hash));
459 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
460 gcry_strerror (err));
461 gcry_cipher_close (*cyper_ptr);
466 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
469 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
470 gcry_strerror (err));
471 gcry_cipher_close (*cyper_ptr);
477 } /* }}} int network_get_aes256_cypher */
478 #endif /* HAVE_LIBGCRYPT */
480 static int write_part_values (char **ret_buffer, int *ret_buffer_len,
481 const data_set_t *ds, const value_list_t *vl)
487 part_header_t pkg_ph;
488 uint16_t pkg_num_values;
489 uint8_t *pkg_values_types;
495 num_values = vl->values_len;
496 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
497 + (num_values * sizeof (uint8_t))
498 + (num_values * sizeof (value_t));
500 if (*ret_buffer_len < packet_len)
503 pkg_values_types = (uint8_t *) malloc (num_values * sizeof (uint8_t));
504 if (pkg_values_types == NULL)
506 ERROR ("network plugin: write_part_values: malloc failed.");
510 pkg_values = (value_t *) malloc (num_values * sizeof (value_t));
511 if (pkg_values == NULL)
513 free (pkg_values_types);
514 ERROR ("network plugin: write_part_values: malloc failed.");
518 pkg_ph.type = htons (TYPE_VALUES);
519 pkg_ph.length = htons (packet_len);
521 pkg_num_values = htons ((uint16_t) vl->values_len);
523 for (i = 0; i < num_values; i++)
525 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
526 switch (ds->ds[i].type)
528 case DS_TYPE_COUNTER:
529 pkg_values[i].counter = htonll (vl->values[i].counter);
533 pkg_values[i].gauge = htond (vl->values[i].gauge);
537 pkg_values[i].derive = htonll (vl->values[i].derive);
540 case DS_TYPE_ABSOLUTE:
541 pkg_values[i].absolute = htonll (vl->values[i].absolute);
545 free (pkg_values_types);
547 ERROR ("network plugin: write_part_values: "
548 "Unknown data source type: %i",
551 } /* switch (ds->ds[i].type) */
552 } /* for (num_values) */
555 * Use `memcpy' to write everything to the buffer, because the pointer
556 * may be unaligned and some architectures, such as SPARC, can't handle
559 packet_ptr = *ret_buffer;
561 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
562 offset += sizeof (pkg_ph);
563 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
564 offset += sizeof (pkg_num_values);
565 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
566 offset += num_values * sizeof (uint8_t);
567 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
568 offset += num_values * sizeof (value_t);
570 assert (offset == packet_len);
572 *ret_buffer = packet_ptr + packet_len;
573 *ret_buffer_len -= packet_len;
575 free (pkg_values_types);
579 } /* int write_part_values */
581 static int write_part_number (char **ret_buffer, int *ret_buffer_len,
582 int type, uint64_t value)
587 part_header_t pkg_head;
592 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
594 if (*ret_buffer_len < packet_len)
597 pkg_head.type = htons (type);
598 pkg_head.length = htons (packet_len);
599 pkg_value = htonll (value);
601 packet_ptr = *ret_buffer;
603 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
604 offset += sizeof (pkg_head);
605 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
606 offset += sizeof (pkg_value);
608 assert (offset == packet_len);
610 *ret_buffer = packet_ptr + packet_len;
611 *ret_buffer_len -= packet_len;
614 } /* int write_part_number */
616 static int write_part_string (char **ret_buffer, int *ret_buffer_len,
617 int type, const char *str, int str_len)
627 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
628 if (*ret_buffer_len < buffer_len)
631 pkg_type = htons (type);
632 pkg_length = htons (buffer_len);
634 buffer = *ret_buffer;
636 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
637 offset += sizeof (pkg_type);
638 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
639 offset += sizeof (pkg_length);
640 memcpy (buffer + offset, str, str_len);
642 memset (buffer + offset, '\0', 1);
645 assert (offset == buffer_len);
647 *ret_buffer = buffer + buffer_len;
648 *ret_buffer_len -= buffer_len;
651 } /* int write_part_string */
653 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
654 value_t **ret_values, int *ret_num_values)
656 char *buffer = *ret_buffer;
657 size_t buffer_len = *ret_buffer_len;
672 NOTICE ("network plugin: packet is too short: "
673 "buffer_len = %zu", buffer_len);
677 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
678 buffer += sizeof (tmp16);
679 pkg_type = ntohs (tmp16);
681 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
682 buffer += sizeof (tmp16);
683 pkg_length = ntohs (tmp16);
685 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
686 buffer += sizeof (tmp16);
687 pkg_numval = ntohs (tmp16);
689 assert (pkg_type == TYPE_VALUES);
691 exp_size = 3 * sizeof (uint16_t)
692 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
693 if ((buffer_len < 0) || (buffer_len < exp_size))
695 WARNING ("network plugin: parse_part_values: "
697 "Chunk of size %zu expected, "
698 "but buffer has only %zu bytes left.",
699 exp_size, buffer_len);
703 if (pkg_length != exp_size)
705 WARNING ("network plugin: parse_part_values: "
706 "Length and number of values "
707 "in the packet don't match.");
711 pkg_types = (uint8_t *) malloc (pkg_numval * sizeof (uint8_t));
712 pkg_values = (value_t *) malloc (pkg_numval * sizeof (value_t));
713 if ((pkg_types == NULL) || (pkg_values == NULL))
717 ERROR ("network plugin: parse_part_values: malloc failed.");
721 memcpy ((void *) pkg_types, (void *) buffer, pkg_numval * sizeof (uint8_t));
722 buffer += pkg_numval * sizeof (uint8_t);
723 memcpy ((void *) pkg_values, (void *) buffer, pkg_numval * sizeof (value_t));
724 buffer += pkg_numval * sizeof (value_t);
726 for (i = 0; i < pkg_numval; i++)
728 switch (pkg_types[i])
730 case DS_TYPE_COUNTER:
731 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
735 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
739 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
742 case DS_TYPE_ABSOLUTE:
743 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
749 NOTICE ("network plugin: parse_part_values: "
750 "Don't know how to handle data source type %"PRIu8,
753 } /* switch (pkg_types[i]) */
756 *ret_buffer = buffer;
757 *ret_buffer_len = buffer_len - pkg_length;
758 *ret_num_values = pkg_numval;
759 *ret_values = pkg_values;
764 } /* int parse_part_values */
766 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
769 char *buffer = *ret_buffer;
770 size_t buffer_len = *ret_buffer_len;
774 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
779 if ((buffer_len < 0) || ((size_t) buffer_len < exp_size))
781 WARNING ("network plugin: parse_part_number: "
783 "Chunk of size %zu expected, "
784 "but buffer has only %zu bytes left.",
785 exp_size, buffer_len);
789 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
790 buffer += sizeof (tmp16);
791 pkg_type = ntohs (tmp16);
793 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
794 buffer += sizeof (tmp16);
795 pkg_length = ntohs (tmp16);
797 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
798 buffer += sizeof (tmp64);
799 *value = ntohll (tmp64);
801 *ret_buffer = buffer;
802 *ret_buffer_len = buffer_len - pkg_length;
805 } /* int parse_part_number */
807 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
808 char *output, int output_len)
810 char *buffer = *ret_buffer;
811 size_t buffer_len = *ret_buffer_len;
814 size_t header_size = 2 * sizeof (uint16_t);
819 if ((buffer_len < 0) || (buffer_len < header_size))
821 WARNING ("network plugin: parse_part_string: "
823 "Chunk of at least size %zu expected, "
824 "but buffer has only %zu bytes left.",
825 header_size, buffer_len);
829 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
830 buffer += sizeof (tmp16);
831 pkg_type = ntohs (tmp16);
833 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
834 buffer += sizeof (tmp16);
835 pkg_length = ntohs (tmp16);
837 /* Check that packet fits in the input buffer */
838 if (pkg_length > buffer_len)
840 WARNING ("network plugin: parse_part_string: "
842 "Chunk of size %"PRIu16" received, "
843 "but buffer has only %zu bytes left.",
844 pkg_length, buffer_len);
848 /* Check that pkg_length is in the valid range */
849 if (pkg_length <= header_size)
851 WARNING ("network plugin: parse_part_string: "
853 "Header claims this packet is only %hu "
854 "bytes long.", pkg_length);
858 /* Check that the package data fits into the output buffer.
859 * The previous if-statement ensures that:
860 * `pkg_length > header_size' */
862 || ((size_t) output_len < ((size_t) pkg_length - header_size)))
864 WARNING ("network plugin: parse_part_string: "
865 "Output buffer too small.");
869 /* All sanity checks successfull, let's copy the data over */
870 output_len = pkg_length - header_size;
871 memcpy ((void *) output, (void *) buffer, output_len);
872 buffer += output_len;
874 /* For some very weird reason '\0' doesn't do the trick on SPARC in
876 if (output[output_len - 1] != 0)
878 WARNING ("network plugin: parse_part_string: "
879 "Received string does not end "
880 "with a NULL-byte.");
884 *ret_buffer = buffer;
885 *ret_buffer_len = buffer_len - pkg_length;
888 } /* int parse_part_string */
890 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
891 * parse_packet and vice versa. */
892 #define PP_SIGNED 0x01
893 #define PP_ENCRYPTED 0x02
894 static int parse_packet (sockent_t *se,
895 void *buffer, size_t buffer_size, int flags);
897 #define BUFFER_READ(p,s) do { \
898 memcpy ((p), buffer + buffer_offset, (s)); \
899 buffer_offset += (s); \
903 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
904 void **ret_buffer, size_t *ret_buffer_len, int flags)
908 size_t buffer_offset;
913 part_signature_sha256_t pss;
914 uint16_t pss_head_length;
915 char hash[sizeof (pss.hash)];
919 unsigned char *hash_ptr;
921 buffer = *ret_buffer;
922 buffer_len = *ret_buffer_len;
925 if (se->data.server.userdb == NULL)
927 NOTICE ("network plugin: Received signed network packet but can't verify "
928 "it because no user DB has been configured. Will accept it.");
932 /* Check if the buffer has enough data for this structure. */
933 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
936 /* Read type and length header */
937 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
938 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
939 pss_head_length = ntohs (pss.head.length);
941 /* Check if the `pss_head_length' is within bounds. */
942 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
943 || (pss_head_length > buffer_len))
945 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
950 BUFFER_READ (pss.hash, sizeof (pss.hash));
952 /* Calculate username length (without null byte) and allocate memory */
953 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
954 pss.username = malloc (username_len + 1);
955 if (pss.username == NULL)
958 /* Read the username */
959 BUFFER_READ (pss.username, username_len);
960 pss.username[username_len] = 0;
962 assert (buffer_offset == pss_head_length);
964 /* Query the password */
965 secret = fbh_get (se->data.server.userdb, pss.username);
968 ERROR ("network plugin: Unknown user: %s", pss.username);
969 sfree (pss.username);
973 /* Create a hash device and check the HMAC */
975 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
978 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
979 gcry_strerror (err));
981 sfree (pss.username);
985 err = gcry_md_setkey (hd, secret, strlen (secret));
988 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
994 buffer + PART_SIGNATURE_SHA256_SIZE,
995 buffer_len - PART_SIGNATURE_SHA256_SIZE);
996 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
997 if (hash_ptr == NULL)
999 ERROR ("network plugin: gcry_md_read failed.");
1002 sfree (pss.username);
1005 memcpy (hash, hash_ptr, sizeof (hash));
1012 sfree (pss.username);
1014 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1016 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1021 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1025 *ret_buffer = buffer + buffer_len;
1026 *ret_buffer_len = 0;
1029 } /* }}} int parse_part_sign_sha256 */
1030 /* #endif HAVE_LIBGCRYPT */
1032 #else /* if !HAVE_LIBGCRYPT */
1033 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1034 void **ret_buffer, size_t *ret_buffer_size, int flags)
1036 static int warning_has_been_printed = 0;
1040 size_t buffer_offset;
1043 part_signature_sha256_t pss;
1045 buffer = *ret_buffer;
1046 buffer_size = *ret_buffer_size;
1049 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1052 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1053 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1054 part_len = ntohs (pss.head.length);
1056 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1057 || (part_len > buffer_size))
1060 if (warning_has_been_printed == 0)
1062 WARNING ("network plugin: Received signed packet, but the network "
1063 "plugin was not linked with libgcrypt, so I cannot "
1064 "verify the signature. The packet will be accepted.");
1065 warning_has_been_printed = 1;
1068 parse_packet (se, buffer + part_len, buffer_size - part_len, flags);
1070 *ret_buffer = buffer + buffer_size;
1071 *ret_buffer_size = 0;
1074 } /* }}} int parse_part_sign_sha256 */
1075 #endif /* !HAVE_LIBGCRYPT */
1078 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1079 void **ret_buffer, size_t *ret_buffer_len,
1082 char *buffer = *ret_buffer;
1083 size_t buffer_len = *ret_buffer_len;
1086 size_t buffer_offset;
1087 uint16_t username_len;
1088 part_encryption_aes256_t pea;
1089 unsigned char hash[sizeof (pea.hash)];
1091 gcry_cipher_hd_t cypher;
1094 /* Make sure at least the header if available. */
1095 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1097 NOTICE ("network plugin: parse_part_encr_aes256: "
1098 "Discarding short packet.");
1104 /* Copy the unencrypted information into `pea'. */
1105 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1106 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1108 /* Check the `part size'. */
1109 part_size = ntohs (pea.head.length);
1110 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1111 || (part_size > buffer_len))
1113 NOTICE ("network plugin: parse_part_encr_aes256: "
1114 "Discarding part with invalid size.");
1118 /* Read the username */
1119 BUFFER_READ (&username_len, sizeof (username_len));
1120 username_len = ntohs (username_len);
1122 if ((username_len <= 0)
1123 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1125 NOTICE ("network plugin: parse_part_encr_aes256: "
1126 "Discarding part with invalid username length.");
1130 assert (username_len > 0);
1131 pea.username = malloc (username_len + 1);
1132 if (pea.username == NULL)
1134 BUFFER_READ (pea.username, username_len);
1135 pea.username[username_len] = 0;
1137 /* Last but not least, the initialization vector */
1138 BUFFER_READ (pea.iv, sizeof (pea.iv));
1140 /* Make sure we are at the right position */
1141 assert (buffer_offset == (username_len +
1142 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1144 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1149 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1150 assert (payload_len > 0);
1152 /* Decrypt the packet in-place */
1153 err = gcry_cipher_decrypt (cypher,
1154 buffer + buffer_offset,
1155 part_size - buffer_offset,
1156 /* in = */ NULL, /* in len = */ 0);
1159 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1160 gcry_strerror (err));
1165 BUFFER_READ (pea.hash, sizeof (pea.hash));
1167 /* Make sure we're at the right position - again */
1168 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1169 assert (buffer_offset == (part_size - payload_len));
1171 /* Check hash sum */
1172 memset (hash, 0, sizeof (hash));
1173 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1174 buffer + buffer_offset, payload_len);
1175 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1177 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1181 parse_packet (se, buffer + buffer_offset, payload_len,
1182 flags | PP_ENCRYPTED);
1184 /* Update return values */
1185 *ret_buffer = buffer + part_size;
1186 *ret_buffer_len = buffer_len - part_size;
1189 } /* }}} int parse_part_encr_aes256 */
1190 /* #endif HAVE_LIBGCRYPT */
1192 #else /* if !HAVE_LIBGCRYPT */
1193 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1194 void **ret_buffer, size_t *ret_buffer_size, int flags)
1196 static int warning_has_been_printed = 0;
1200 size_t buffer_offset;
1205 buffer = *ret_buffer;
1206 buffer_size = *ret_buffer_size;
1209 /* parse_packet assures this minimum size. */
1210 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1212 BUFFER_READ (&ph.type, sizeof (ph.type));
1213 BUFFER_READ (&ph.length, sizeof (ph.length));
1214 ph_length = ntohs (ph.length);
1216 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1217 || (ph_length > buffer_size))
1219 ERROR ("network plugin: AES-256 encrypted part "
1220 "with invalid length received.");
1224 if (warning_has_been_printed == 0)
1226 WARNING ("network plugin: Received encrypted packet, but the network "
1227 "plugin was not linked with libgcrypt, so I cannot "
1228 "decrypt it. The part will be discarded.");
1229 warning_has_been_printed = 1;
1232 *ret_buffer += ph_length;
1233 *ret_buffer_size -= ph_length;
1236 } /* }}} int parse_part_encr_aes256 */
1237 #endif /* !HAVE_LIBGCRYPT */
1241 static int parse_packet (sockent_t *se, /* {{{ */
1242 void *buffer, size_t buffer_size, int flags)
1246 value_list_t vl = VALUE_LIST_INIT;
1250 int packet_was_signed = (flags & PP_SIGNED);
1251 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1252 int printed_ignore_warning = 0;
1253 #endif /* HAVE_LIBGCRYPT */
1256 memset (&vl, '\0', sizeof (vl));
1257 memset (&n, '\0', sizeof (n));
1260 while ((status == 0) && (0 < buffer_size)
1261 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1263 uint16_t pkg_length;
1266 memcpy ((void *) &pkg_type,
1269 memcpy ((void *) &pkg_length,
1270 (void *) (buffer + sizeof (pkg_type)),
1271 sizeof (pkg_length));
1273 pkg_length = ntohs (pkg_length);
1274 pkg_type = ntohs (pkg_type);
1276 if (pkg_length > buffer_size)
1278 /* Ensure that this loop terminates eventually */
1279 if (pkg_length < (2 * sizeof (uint16_t)))
1282 if (pkg_type == TYPE_ENCR_AES256)
1284 status = parse_part_encr_aes256 (se,
1285 &buffer, &buffer_size, flags);
1288 ERROR ("network plugin: Decrypting AES256 "
1290 "with status %i.", status);
1295 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1296 && (packet_was_encrypted == 0))
1298 if (printed_ignore_warning == 0)
1300 INFO ("network plugin: Unencrypted packet or "
1301 "part has been ignored.");
1302 printed_ignore_warning = 1;
1304 buffer = ((char *) buffer) + pkg_length;
1307 #endif /* HAVE_LIBGCRYPT */
1308 else if (pkg_type == TYPE_SIGN_SHA256)
1310 status = parse_part_sign_sha256 (se,
1311 &buffer, &buffer_size, flags);
1314 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1316 "with status %i.", status);
1321 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1322 && (packet_was_encrypted == 0)
1323 && (packet_was_signed == 0))
1325 if (printed_ignore_warning == 0)
1327 INFO ("network plugin: Unsigned packet or "
1328 "part has been ignored.");
1329 printed_ignore_warning = 1;
1331 buffer = ((char *) buffer) + pkg_length;
1334 #endif /* HAVE_LIBGCRYPT */
1335 else if (pkg_type == TYPE_VALUES)
1337 status = parse_part_values (&buffer, &buffer_size,
1338 &vl.values, &vl.values_len);
1342 network_dispatch_values (&vl);
1346 else if (pkg_type == TYPE_TIME)
1349 status = parse_part_number (&buffer, &buffer_size,
1353 vl.time = (time_t) tmp;
1354 n.time = (time_t) tmp;
1357 else if (pkg_type == TYPE_INTERVAL)
1360 status = parse_part_number (&buffer, &buffer_size,
1363 vl.interval = (int) tmp;
1365 else if (pkg_type == TYPE_HOST)
1367 status = parse_part_string (&buffer, &buffer_size,
1368 vl.host, sizeof (vl.host));
1370 sstrncpy (n.host, vl.host, sizeof (n.host));
1372 else if (pkg_type == TYPE_PLUGIN)
1374 status = parse_part_string (&buffer, &buffer_size,
1375 vl.plugin, sizeof (vl.plugin));
1377 sstrncpy (n.plugin, vl.plugin,
1380 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1382 status = parse_part_string (&buffer, &buffer_size,
1384 sizeof (vl.plugin_instance));
1386 sstrncpy (n.plugin_instance,
1388 sizeof (n.plugin_instance));
1390 else if (pkg_type == TYPE_TYPE)
1392 status = parse_part_string (&buffer, &buffer_size,
1393 vl.type, sizeof (vl.type));
1395 sstrncpy (n.type, vl.type, sizeof (n.type));
1397 else if (pkg_type == TYPE_TYPE_INSTANCE)
1399 status = parse_part_string (&buffer, &buffer_size,
1401 sizeof (vl.type_instance));
1403 sstrncpy (n.type_instance, vl.type_instance,
1404 sizeof (n.type_instance));
1406 else if (pkg_type == TYPE_MESSAGE)
1408 status = parse_part_string (&buffer, &buffer_size,
1409 n.message, sizeof (n.message));
1415 else if ((n.severity != NOTIF_FAILURE)
1416 && (n.severity != NOTIF_WARNING)
1417 && (n.severity != NOTIF_OKAY))
1419 INFO ("network plugin: "
1420 "Ignoring notification with "
1421 "unknown severity %i.",
1424 else if (n.time <= 0)
1426 INFO ("network plugin: "
1427 "Ignoring notification with "
1430 else if (strlen (n.message) <= 0)
1432 INFO ("network plugin: "
1433 "Ignoring notification with "
1434 "an empty message.");
1438 plugin_dispatch_notification (&n);
1441 else if (pkg_type == TYPE_SEVERITY)
1444 status = parse_part_number (&buffer, &buffer_size,
1447 n.severity = (int) tmp;
1451 DEBUG ("network plugin: parse_packet: Unknown part"
1452 " type: 0x%04hx", pkg_type);
1453 buffer = ((char *) buffer) + pkg_length;
1455 } /* while (buffer_size > sizeof (part_header_t)) */
1457 if (status == 0 && buffer_size > 0)
1458 WARNING ("network plugin: parse_packet: Received truncated "
1459 "packet, try increasing `MaxPacketSize'");
1462 } /* }}} int parse_packet */
1464 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1473 sfree (sec->username);
1474 sfree (sec->password);
1475 if (sec->cypher != NULL)
1476 gcry_cipher_close (sec->cypher);
1478 } /* }}} void free_sockent_client */
1480 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1484 for (i = 0; i < ses->fd_num; i++)
1486 if (ses->fd[i] >= 0)
1495 sfree (ses->auth_file);
1496 fbh_destroy (ses->userdb);
1497 if (ses->cypher != NULL)
1498 gcry_cipher_close (ses->cypher);
1500 } /* }}} void free_sockent_server */
1502 static void sockent_destroy (sockent_t *se) /* {{{ */
1506 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1513 sfree (se->service);
1515 if (se->type == SOCKENT_TYPE_CLIENT)
1516 free_sockent_client (&se->data.client);
1518 free_sockent_server (&se->data.server);
1523 } /* }}} void sockent_destroy */
1526 * int network_set_ttl
1528 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1529 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1531 * The `struct addrinfo' is used to destinguish between unicast and multicast
1534 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1536 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1537 network_config_ttl);
1539 assert (se->type == SOCKENT_TYPE_CLIENT);
1541 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1544 if (ai->ai_family == AF_INET)
1546 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1549 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1550 optname = IP_MULTICAST_TTL;
1554 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1555 &network_config_ttl,
1556 sizeof (network_config_ttl)) == -1)
1559 ERROR ("setsockopt: %s",
1560 sstrerror (errno, errbuf, sizeof (errbuf)));
1564 else if (ai->ai_family == AF_INET6)
1566 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1567 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1570 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1571 optname = IPV6_MULTICAST_HOPS;
1573 optname = IPV6_UNICAST_HOPS;
1575 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1576 &network_config_ttl,
1577 sizeof (network_config_ttl)) == -1)
1580 ERROR ("setsockopt: %s",
1581 sstrerror (errno, errbuf,
1588 } /* int network_set_ttl */
1590 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1592 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1595 assert (se->type == SOCKENT_TYPE_CLIENT);
1597 if (ai->ai_family == AF_INET)
1599 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1601 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1603 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1604 /* If possible, use the "ip_mreqn" structure which has
1605 * an "interface index" member. Using the interface
1606 * index is preferred here, because of its similarity
1607 * to the way IPv6 handles this. Unfortunately, it
1608 * appears not to be portable. */
1609 struct ip_mreqn mreq;
1611 memset (&mreq, 0, sizeof (mreq));
1612 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1613 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1614 mreq.imr_ifindex = se->interface;
1616 struct ip_mreq mreq;
1618 memset (&mreq, 0, sizeof (mreq));
1619 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1620 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1623 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1624 &mreq, sizeof (mreq)) == -1)
1627 ERROR ("setsockopt: %s",
1628 sstrerror (errno, errbuf, sizeof (errbuf)));
1635 else if (ai->ai_family == AF_INET6)
1637 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1639 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1641 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1643 sizeof (se->interface)) == -1)
1646 ERROR ("setsockopt: %s",
1647 sstrerror (errno, errbuf,
1656 /* else: Not a multicast interface. */
1657 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1658 if (se->interface != 0)
1660 char interface_name[IFNAMSIZ];
1662 if (if_indextoname (se->interface, interface_name) == NULL)
1665 DEBUG ("network plugin: Binding socket to interface %s", interface_name);
1667 if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
1669 sizeof(interface_name)) == -1 )
1672 ERROR ("setsockopt: %s",
1673 sstrerror (errno, errbuf, sizeof (errbuf)));
1677 /* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1680 WARNING ("network plugin: Cannot set the interface on a unicast "
1682 # if !defined(SO_BINDTODEVICE)
1683 "the the \"SO_BINDTODEVICE\" socket option "
1685 "the \"if_indextoname\" function "
1687 "is not available on your system.");
1691 } /* }}} network_set_interface */
1693 static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
1698 /* allow multiple sockets to use the same PORT number */
1699 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1700 &yes, sizeof(yes)) == -1) {
1702 ERROR ("setsockopt: %s",
1703 sstrerror (errno, errbuf, sizeof (errbuf)));
1707 DEBUG ("fd = %i; calling `bind'", fd);
1709 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1713 sstrerror (errno, errbuf, sizeof (errbuf)));
1717 if (ai->ai_family == AF_INET)
1719 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1720 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1722 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1723 struct ip_mreqn mreq;
1725 struct ip_mreq mreq;
1728 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1730 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1731 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1732 /* Set the interface using the interface index if
1733 * possible (available). Unfortunately, the struct
1734 * ip_mreqn is not portable. */
1735 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1736 mreq.imr_ifindex = interface_idx;
1738 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1741 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1742 &loop, sizeof (loop)) == -1)
1745 ERROR ("setsockopt: %s",
1746 sstrerror (errno, errbuf,
1751 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1752 &mreq, sizeof (mreq)) == -1)
1755 ERROR ("setsockopt: %s",
1756 sstrerror (errno, errbuf,
1764 else if (ai->ai_family == AF_INET6)
1766 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1767 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1768 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1770 struct ipv6_mreq mreq;
1772 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1774 memcpy (&mreq.ipv6mr_multiaddr,
1776 sizeof (addr->sin6_addr));
1778 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1779 * ipv6mr_interface may be set to zeroes to
1780 * choose the default multicast interface or to
1781 * the index of a particular multicast-capable
1782 * interface if the host is multihomed.
1783 * Membership is associ-associated with a
1784 * single interface; programs running on
1785 * multihomed hosts may need to join the same
1786 * group on more than one interface.*/
1787 mreq.ipv6mr_interface = interface_idx;
1789 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1790 &loop, sizeof (loop)) == -1)
1793 ERROR ("setsockopt: %s",
1794 sstrerror (errno, errbuf,
1799 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1800 &mreq, sizeof (mreq)) == -1)
1803 ERROR ("setsockopt: %s",
1804 sstrerror (errno, errbuf,
1813 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1814 /* if a specific interface was set, bind the socket to it. But to avoid
1815 * possible problems with multicast routing, only do that for non-multicast
1817 if (interface_idx != 0)
1819 char interface_name[IFNAMSIZ];
1821 if (if_indextoname (interface_idx, interface_name) == NULL)
1824 DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
1826 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
1828 sizeof(interface_name)) == -1 )
1831 ERROR ("setsockopt: %s",
1832 sstrerror (errno, errbuf, sizeof (errbuf)));
1836 #endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1839 } /* int network_bind_socket */
1841 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
1842 * or `SOCKENT_TYPE_SERVER' */
1843 static int sockent_init (sockent_t *se, int type) /* {{{ */
1848 memset (se, 0, sizeof (*se));
1850 se->type = SOCKENT_TYPE_CLIENT;
1856 if (type == SOCKENT_TYPE_SERVER)
1858 se->type = SOCKENT_TYPE_SERVER;
1859 se->data.server.fd = NULL;
1861 se->data.server.security_level = SECURITY_LEVEL_NONE;
1862 se->data.server.auth_file = NULL;
1863 se->data.server.userdb = NULL;
1864 se->data.server.cypher = NULL;
1869 se->data.client.fd = -1;
1870 se->data.client.addr = NULL;
1872 se->data.client.security_level = SECURITY_LEVEL_NONE;
1873 se->data.client.username = NULL;
1874 se->data.client.password = NULL;
1875 se->data.client.cypher = NULL;
1880 } /* }}} int sockent_init */
1882 /* Open the file descriptors for a initialized sockent structure. */
1883 static int sockent_open (sockent_t *se) /* {{{ */
1885 struct addrinfo ai_hints;
1886 struct addrinfo *ai_list, *ai_ptr;
1890 const char *service;
1895 /* Set up the security structures. */
1896 #if HAVE_LIBGCRYPT /* {{{ */
1897 if (se->type == SOCKENT_TYPE_CLIENT)
1899 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
1901 if ((se->data.client.username == NULL)
1902 || (se->data.client.password == NULL))
1904 ERROR ("network plugin: Client socket with "
1905 "security requested, but no "
1906 "credentials are configured.");
1909 gcry_md_hash_buffer (GCRY_MD_SHA256,
1910 se->data.client.password_hash,
1911 se->data.client.password,
1912 strlen (se->data.client.password));
1915 else /* (se->type == SOCKENT_TYPE_SERVER) */
1917 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
1919 if (se->data.server.auth_file == NULL)
1921 ERROR ("network plugin: Server socket with "
1922 "security requested, but no "
1923 "password file is configured.");
1927 if (se->data.server.auth_file != NULL)
1929 se->data.server.userdb = fbh_create (se->data.server.auth_file);
1930 if (se->data.server.userdb == NULL)
1932 ERROR ("network plugin: Reading password file "
1934 se->data.server.auth_file);
1935 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
1940 #endif /* }}} HAVE_LIBGCRYPT */
1943 service = se->service;
1945 if (service == NULL)
1946 service = NET_DEFAULT_PORT;
1948 DEBUG ("network plugin: sockent_open: node = %s; service = %s;",
1951 memset (&ai_hints, 0, sizeof (ai_hints));
1952 ai_hints.ai_flags = 0;
1954 ai_hints.ai_flags |= AI_PASSIVE;
1956 #ifdef AI_ADDRCONFIG
1957 ai_hints.ai_flags |= AI_ADDRCONFIG;
1959 ai_hints.ai_family = AF_UNSPEC;
1960 ai_hints.ai_socktype = SOCK_DGRAM;
1961 ai_hints.ai_protocol = IPPROTO_UDP;
1963 ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
1966 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
1967 (se->node == NULL) ? "(null)" : se->node,
1968 (se->service == NULL) ? "(null)" : se->service,
1969 gai_strerror (ai_return));
1973 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1977 if (se->type == SOCKENT_TYPE_SERVER) /* {{{ */
1981 tmp = realloc (se->data.server.fd,
1982 sizeof (*tmp) * (se->data.server.fd_num + 1));
1985 ERROR ("network plugin: realloc failed.");
1988 se->data.server.fd = tmp;
1989 tmp = se->data.server.fd + se->data.server.fd_num;
1991 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
1992 ai_ptr->ai_protocol);
1996 ERROR ("network plugin: socket(2) failed: %s",
1997 sstrerror (errno, errbuf,
2002 status = network_bind_socket (*tmp, ai_ptr, se->interface);
2010 se->data.server.fd_num++;
2012 } /* }}} if (se->type == SOCKENT_TYPE_SERVER) */
2013 else /* if (se->type == SOCKENT_TYPE_CLIENT) {{{ */
2015 se->data.client.fd = socket (ai_ptr->ai_family,
2016 ai_ptr->ai_socktype,
2017 ai_ptr->ai_protocol);
2018 if (se->data.client.fd < 0)
2021 ERROR ("network plugin: socket(2) failed: %s",
2022 sstrerror (errno, errbuf,
2027 se->data.client.addr = malloc (sizeof (*se->data.client.addr));
2028 if (se->data.client.addr == NULL)
2030 ERROR ("network plugin: malloc failed.");
2031 close (se->data.client.fd);
2032 se->data.client.fd = -1;
2036 memset (se->data.client.addr, 0, sizeof (*se->data.client.addr));
2037 assert (sizeof (*se->data.client.addr) >= ai_ptr->ai_addrlen);
2038 memcpy (se->data.client.addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2039 se->data.client.addrlen = ai_ptr->ai_addrlen;
2041 network_set_ttl (se, ai_ptr);
2042 network_set_interface (se, ai_ptr);
2044 /* We don't open more than one write-socket per
2045 * node/service pair.. */
2047 } /* }}} if (se->type == SOCKENT_TYPE_CLIENT) */
2048 } /* for (ai_list) */
2050 freeaddrinfo (ai_list);
2052 /* Check if all went well. */
2053 if (se->type == SOCKENT_TYPE_SERVER)
2055 if (se->data.server.fd_num <= 0)
2058 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2060 if (se->data.client.fd < 0)
2065 } /* }}} int sockent_open */
2067 /* Add a sockent to the global list of sockets */
2068 static int sockent_add (sockent_t *se) /* {{{ */
2070 sockent_t *last_ptr;
2075 if (se->type == SOCKENT_TYPE_SERVER)
2080 tmp = realloc (listen_sockets_pollfd,
2081 sizeof (*tmp) * (listen_sockets_num
2082 + se->data.server.fd_num));
2085 ERROR ("network plugin: realloc failed.");
2088 listen_sockets_pollfd = tmp;
2089 tmp = listen_sockets_pollfd + listen_sockets_num;
2091 for (i = 0; i < se->data.server.fd_num; i++)
2093 memset (tmp + i, 0, sizeof (*tmp));
2094 tmp[i].fd = se->data.server.fd[i];
2095 tmp[i].events = POLLIN | POLLPRI;
2099 listen_sockets_num += se->data.server.fd_num;
2101 if (listen_sockets == NULL)
2103 listen_sockets = se;
2106 last_ptr = listen_sockets;
2108 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2110 if (sending_sockets == NULL)
2112 sending_sockets = se;
2115 last_ptr = sending_sockets;
2118 while (last_ptr->next != NULL)
2119 last_ptr = last_ptr->next;
2120 last_ptr->next = se;
2123 } /* }}} int sockent_add */
2125 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
2129 receive_list_entry_t *ent;
2132 /* Lock and wait for more data to come in */
2133 pthread_mutex_lock (&receive_list_lock);
2134 while ((listen_loop == 0)
2135 && (receive_list_head == NULL))
2136 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
2138 /* Remove the head entry and unlock */
2139 ent = receive_list_head;
2141 receive_list_head = ent->next;
2142 receive_list_length--;
2143 pthread_mutex_unlock (&receive_list_lock);
2145 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2146 * because we dispatch all missing packets before shutting down. */
2150 /* Look for the correct `sockent_t' */
2151 se = listen_sockets;
2156 for (i = 0; i < se->data.server.fd_num; i++)
2157 if (se->data.server.fd[i] == ent->fd)
2160 if (i < se->data.server.fd_num)
2168 ERROR ("network plugin: Got packet from FD %i, but can't "
2169 "find an appropriate socket entry.",
2176 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0);
2182 } /* }}} void *dispatch_thread */
2184 static int network_receive (void) /* {{{ */
2186 char buffer[network_config_packet_size];
2192 receive_list_entry_t *private_list_head;
2193 receive_list_entry_t *private_list_tail;
2194 uint64_t private_list_length;
2196 assert (listen_sockets_num > 0);
2198 private_list_head = NULL;
2199 private_list_tail = NULL;
2200 private_list_length = 0;
2202 while (listen_loop == 0)
2204 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2211 ERROR ("poll failed: %s",
2212 sstrerror (errno, errbuf, sizeof (errbuf)));
2216 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2218 receive_list_entry_t *ent;
2220 if ((listen_sockets_pollfd[i].revents
2221 & (POLLIN | POLLPRI)) == 0)
2225 buffer_len = recv (listen_sockets_pollfd[i].fd,
2226 buffer, sizeof (buffer),
2231 ERROR ("recv failed: %s",
2232 sstrerror (errno, errbuf,
2237 stats_octets_rx += ((uint64_t) buffer_len);
2240 /* TODO: Possible performance enhancement: Do not free
2241 * these entries in the dispatch thread but put them in
2242 * another list, so we don't have to allocate more and
2243 * more of these structures. */
2244 ent = malloc (sizeof (receive_list_entry_t));
2247 ERROR ("network plugin: malloc failed.");
2250 memset (ent, 0, sizeof (receive_list_entry_t));
2251 ent->data = malloc (network_config_packet_size);
2252 if (ent->data == NULL)
2255 ERROR ("network plugin: malloc failed.");
2258 ent->fd = listen_sockets_pollfd[i].fd;
2261 memcpy (ent->data, buffer, buffer_len);
2262 ent->data_len = buffer_len;
2264 if (private_list_head == NULL)
2265 private_list_head = ent;
2267 private_list_tail->next = ent;
2268 private_list_tail = ent;
2269 private_list_length++;
2271 /* Do not block here. Blocking here has led to
2272 * insufficient performance in the past. */
2273 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2275 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2276 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2278 if (receive_list_head == NULL)
2279 receive_list_head = private_list_head;
2281 receive_list_tail->next = private_list_head;
2282 receive_list_tail = private_list_tail;
2283 receive_list_length += private_list_length;
2285 pthread_cond_signal (&receive_list_cond);
2286 pthread_mutex_unlock (&receive_list_lock);
2288 private_list_head = NULL;
2289 private_list_tail = NULL;
2290 private_list_length = 0;
2292 } /* for (listen_sockets_pollfd) */
2293 } /* while (listen_loop == 0) */
2295 /* Make sure everything is dispatched before exiting. */
2296 if (private_list_head != NULL)
2298 pthread_mutex_lock (&receive_list_lock);
2300 if (receive_list_head == NULL)
2301 receive_list_head = private_list_head;
2303 receive_list_tail->next = private_list_head;
2304 receive_list_tail = private_list_tail;
2305 receive_list_length += private_list_length;
2307 private_list_head = NULL;
2308 private_list_tail = NULL;
2309 private_list_length = 0;
2311 pthread_cond_signal (&receive_list_cond);
2312 pthread_mutex_unlock (&receive_list_lock);
2316 } /* }}} int network_receive */
2318 static void *receive_thread (void __attribute__((unused)) *arg)
2320 return (network_receive () ? (void *) 1 : (void *) 0);
2321 } /* void *receive_thread */
2323 static void network_init_buffer (void)
2325 memset (send_buffer, 0, network_config_packet_size);
2326 send_buffer_ptr = send_buffer;
2327 send_buffer_fill = 0;
2329 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2330 } /* int network_init_buffer */
2332 static void networt_send_buffer_plain (const sockent_t *se, /* {{{ */
2333 const char *buffer, size_t buffer_size)
2339 status = sendto (se->data.client.fd, buffer, buffer_size,
2341 (struct sockaddr *) se->data.client.addr,
2342 se->data.client.addrlen);
2348 ERROR ("network plugin: sendto failed: %s",
2349 sstrerror (errno, errbuf,
2356 } /* }}} void networt_send_buffer_plain */
2359 #define BUFFER_ADD(p,s) do { \
2360 memcpy (buffer + buffer_offset, (p), (s)); \
2361 buffer_offset += (s); \
2364 static void networt_send_buffer_signed (const sockent_t *se, /* {{{ */
2365 const char *in_buffer, size_t in_buffer_size)
2367 part_signature_sha256_t ps;
2368 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2369 size_t buffer_offset;
2370 size_t username_len;
2374 unsigned char *hash;
2377 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2380 ERROR ("network plugin: Creating HMAC object failed: %s",
2381 gcry_strerror (err));
2385 err = gcry_md_setkey (hd, se->data.client.password,
2386 strlen (se->data.client.password));
2389 ERROR ("network plugin: gcry_md_setkey failed: %s",
2390 gcry_strerror (err));
2395 username_len = strlen (se->data.client.username);
2396 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2398 ERROR ("network plugin: Username too long: %s",
2399 se->data.client.username);
2403 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2404 se->data.client.username, username_len);
2405 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2406 in_buffer, in_buffer_size);
2408 /* Initialize the `ps' structure. */
2409 memset (&ps, 0, sizeof (ps));
2410 ps.head.type = htons (TYPE_SIGN_SHA256);
2411 ps.head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len);
2413 /* Calculate the hash value. */
2414 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2415 username_len + in_buffer_size);
2416 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2419 ERROR ("network plugin: gcry_md_read failed.");
2423 memcpy (ps.hash, hash, sizeof (ps.hash));
2425 /* Add the header */
2428 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2429 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2430 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2432 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2437 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2438 networt_send_buffer_plain (se, buffer, buffer_offset);
2439 } /* }}} void networt_send_buffer_signed */
2441 static void networt_send_buffer_encrypted (sockent_t *se, /* {{{ */
2442 const char *in_buffer, size_t in_buffer_size)
2444 part_encryption_aes256_t pea;
2445 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2447 size_t buffer_offset;
2449 size_t username_len;
2451 gcry_cipher_hd_t cypher;
2453 /* Initialize the header fields */
2454 memset (&pea, 0, sizeof (pea));
2455 pea.head.type = htons (TYPE_ENCR_AES256);
2457 pea.username = se->data.client.username;
2459 username_len = strlen (pea.username);
2460 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2462 ERROR ("network plugin: Username too long: %s", pea.username);
2466 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2467 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2468 - sizeof (pea.hash);
2470 assert (buffer_size <= sizeof (buffer));
2471 DEBUG ("network plugin: networt_send_buffer_encrypted: "
2472 "buffer_size = %zu;", buffer_size);
2474 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2475 + username_len + in_buffer_size));
2476 pea.username_length = htons ((uint16_t) username_len);
2478 /* Chose a random initialization vector. */
2479 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2481 /* Create hash of the payload */
2482 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2484 /* Initialize the buffer */
2486 memset (buffer, 0, sizeof (buffer));
2489 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2490 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2491 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2492 BUFFER_ADD (pea.username, username_len);
2493 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2494 assert (buffer_offset == header_size);
2495 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2496 BUFFER_ADD (in_buffer, in_buffer_size);
2498 assert (buffer_offset == buffer_size);
2500 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2501 se->data.client.password);
2505 /* Encrypt the buffer in-place */
2506 err = gcry_cipher_encrypt (cypher,
2507 buffer + header_size,
2508 buffer_size - header_size,
2509 /* in = */ NULL, /* in len = */ 0);
2512 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2513 gcry_strerror (err));
2517 /* Send it out without further modifications */
2518 networt_send_buffer_plain (se, buffer, buffer_size);
2519 } /* }}} void networt_send_buffer_encrypted */
2521 #endif /* HAVE_LIBGCRYPT */
2523 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2527 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2529 for (se = sending_sockets; se != NULL; se = se->next)
2532 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2533 networt_send_buffer_encrypted (se, buffer, buffer_len);
2534 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2535 networt_send_buffer_signed (se, buffer, buffer_len);
2536 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2537 #endif /* HAVE_LIBGCRYPT */
2538 networt_send_buffer_plain (se, buffer, buffer_len);
2539 } /* for (sending_sockets) */
2540 } /* }}} void network_send_buffer */
2542 static int add_to_buffer (char *buffer, int buffer_size, /* {{{ */
2543 value_list_t *vl_def,
2544 const data_set_t *ds, const value_list_t *vl)
2546 char *buffer_orig = buffer;
2548 if (strcmp (vl_def->host, vl->host) != 0)
2550 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2551 vl->host, strlen (vl->host)) != 0)
2553 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2556 if (vl_def->time != vl->time)
2558 if (write_part_number (&buffer, &buffer_size, TYPE_TIME,
2559 (uint64_t) vl->time))
2561 vl_def->time = vl->time;
2564 if (vl_def->interval != vl->interval)
2566 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL,
2567 (uint64_t) vl->interval))
2569 vl_def->interval = vl->interval;
2572 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2574 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2575 vl->plugin, strlen (vl->plugin)) != 0)
2577 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2580 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2582 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2583 vl->plugin_instance,
2584 strlen (vl->plugin_instance)) != 0)
2586 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2589 if (strcmp (vl_def->type, vl->type) != 0)
2591 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2592 vl->type, strlen (vl->type)) != 0)
2594 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2597 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2599 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2601 strlen (vl->type_instance)) != 0)
2603 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2606 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2609 return (buffer - buffer_orig);
2610 } /* }}} int add_to_buffer */
2612 static void flush_buffer (void)
2614 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2617 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2619 stats_octets_tx += ((uint64_t) send_buffer_fill);
2622 network_init_buffer ();
2625 static int network_write (const data_set_t *ds, const value_list_t *vl,
2626 user_data_t __attribute__((unused)) *user_data)
2630 if (!check_send_okay (vl))
2633 char name[6*DATA_MAX_NAME_LEN];
2634 FORMAT_VL (name, sizeof (name), vl);
2635 name[sizeof (name) - 1] = 0;
2636 DEBUG ("network plugin: network_write: "
2637 "NOT sending %s.", name);
2639 /* Counter is not protected by another lock and may be reached by
2640 * multiple threads */
2641 pthread_mutex_lock (&stats_lock);
2642 stats_values_not_sent++;
2643 pthread_mutex_unlock (&stats_lock);
2647 uc_meta_data_add_unsigned_int (vl,
2648 "network:time_sent", (uint64_t) vl->time);
2650 pthread_mutex_lock (&send_buffer_lock);
2652 status = add_to_buffer (send_buffer_ptr,
2653 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2658 /* status == bytes added to the buffer */
2659 send_buffer_fill += status;
2660 send_buffer_ptr += status;
2662 stats_values_sent++;
2668 status = add_to_buffer (send_buffer_ptr,
2669 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2675 send_buffer_fill += status;
2676 send_buffer_ptr += status;
2678 stats_values_sent++;
2684 ERROR ("network plugin: Unable to append to the "
2685 "buffer for some weird reason");
2687 else if ((network_config_packet_size - send_buffer_fill) < 15)
2692 pthread_mutex_unlock (&send_buffer_lock);
2694 return ((status < 0) ? -1 : 0);
2695 } /* int network_write */
2697 static int network_config_set_boolean (const oconfig_item_t *ci, /* {{{ */
2700 if ((ci->values_num != 1)
2701 || ((ci->values[0].type != OCONFIG_TYPE_BOOLEAN)
2702 && (ci->values[0].type != OCONFIG_TYPE_STRING)))
2704 ERROR ("network plugin: The `%s' config option needs "
2705 "exactly one boolean argument.", ci->key);
2709 if (ci->values[0].type == OCONFIG_TYPE_BOOLEAN)
2711 if (ci->values[0].value.boolean)
2718 char *str = ci->values[0].value.string;
2722 else if (IS_FALSE (str))
2726 ERROR ("network plugin: Cannot parse string value `%s' of the `%s' "
2727 "option as boolean value.",
2734 } /* }}} int network_config_set_boolean */
2736 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2739 if ((ci->values_num != 1)
2740 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2742 WARNING ("network plugin: The `TimeToLive' config option needs exactly "
2743 "one numeric argument.");
2747 tmp = (int) ci->values[0].value.number;
2748 if ((tmp > 0) && (tmp <= 255))
2749 network_config_ttl = tmp;
2752 } /* }}} int network_config_set_ttl */
2754 static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
2757 if ((ci->values_num != 1)
2758 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2760 WARNING ("network plugin: The `Interface' config option needs exactly "
2761 "one string argument.");
2765 if (interface == NULL)
2768 *interface = if_nametoindex (ci->values[0].value.string);
2771 } /* }}} int network_config_set_interface */
2773 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
2776 if ((ci->values_num != 1)
2777 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2779 WARNING ("network plugin: The `MaxPacketSize' config option needs exactly "
2780 "one numeric argument.");
2784 tmp = (int) ci->values[0].value.number;
2785 if ((tmp >= 1024) && (tmp <= 65535))
2786 network_config_packet_size = tmp;
2789 } /* }}} int network_config_set_buffer_size */
2792 static int network_config_set_string (const oconfig_item_t *ci, /* {{{ */
2796 if ((ci->values_num != 1)
2797 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2799 WARNING ("network plugin: The `%s' config option needs exactly "
2800 "one string argument.", ci->key);
2804 tmp = strdup (ci->values[0].value.string);
2808 sfree (*ret_string);
2812 } /* }}} int network_config_set_string */
2813 #endif /* HAVE_LIBGCRYPT */
2816 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
2820 if ((ci->values_num != 1)
2821 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2823 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
2824 "one string argument.");
2828 str = ci->values[0].value.string;
2829 if (strcasecmp ("Encrypt", str) == 0)
2830 *retval = SECURITY_LEVEL_ENCRYPT;
2831 else if (strcasecmp ("Sign", str) == 0)
2832 *retval = SECURITY_LEVEL_SIGN;
2833 else if (strcasecmp ("None", str) == 0)
2834 *retval = SECURITY_LEVEL_NONE;
2837 WARNING ("network plugin: Unknown security level: %s.", str);
2842 } /* }}} int network_config_set_security_level */
2843 #endif /* HAVE_LIBGCRYPT */
2845 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
2851 if ((ci->values_num < 1) || (ci->values_num > 2)
2852 || (ci->values[0].type != OCONFIG_TYPE_STRING)
2853 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
2855 ERROR ("network plugin: The `%s' config option needs "
2856 "one or two string arguments.", ci->key);
2860 se = malloc (sizeof (*se));
2863 ERROR ("network plugin: malloc failed.");
2866 sockent_init (se, SOCKENT_TYPE_SERVER);
2868 se->node = strdup (ci->values[0].value.string);
2869 if (ci->values_num >= 2)
2870 se->service = strdup (ci->values[1].value.string);
2872 for (i = 0; i < ci->children_num; i++)
2874 oconfig_item_t *child = ci->children + i;
2877 if (strcasecmp ("AuthFile", child->key) == 0)
2878 network_config_set_string (child, &se->data.server.auth_file);
2879 else if (strcasecmp ("SecurityLevel", child->key) == 0)
2880 network_config_set_security_level (child,
2881 &se->data.server.security_level);
2883 #endif /* HAVE_LIBGCRYPT */
2884 if (strcasecmp ("Interface", child->key) == 0)
2885 network_config_set_interface (child,
2889 WARNING ("network plugin: Option `%s' is not allowed here.",
2895 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
2896 && (se->data.server.auth_file == NULL))
2898 ERROR ("network plugin: A security level higher than `none' was "
2899 "requested, but no AuthFile option was given. Cowardly refusing to "
2900 "open this socket!");
2901 sockent_destroy (se);
2904 #endif /* HAVE_LIBGCRYPT */
2906 status = sockent_open (se);
2909 ERROR ("network plugin: network_config_add_listen: sockent_open failed.");
2910 sockent_destroy (se);
2914 status = sockent_add (se);
2917 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
2918 sockent_destroy (se);
2923 } /* }}} int network_config_add_listen */
2925 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
2931 if ((ci->values_num < 1) || (ci->values_num > 2)
2932 || (ci->values[0].type != OCONFIG_TYPE_STRING)
2933 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
2935 ERROR ("network plugin: The `%s' config option needs "
2936 "one or two string arguments.", ci->key);
2940 se = malloc (sizeof (*se));
2943 ERROR ("network plugin: malloc failed.");
2946 sockent_init (se, SOCKENT_TYPE_CLIENT);
2948 se->node = strdup (ci->values[0].value.string);
2949 if (ci->values_num >= 2)
2950 se->service = strdup (ci->values[1].value.string);
2952 for (i = 0; i < ci->children_num; i++)
2954 oconfig_item_t *child = ci->children + i;
2957 if (strcasecmp ("Username", child->key) == 0)
2958 network_config_set_string (child, &se->data.client.username);
2959 else if (strcasecmp ("Password", child->key) == 0)
2960 network_config_set_string (child, &se->data.client.password);
2961 else if (strcasecmp ("SecurityLevel", child->key) == 0)
2962 network_config_set_security_level (child,
2963 &se->data.client.security_level);
2965 #endif /* HAVE_LIBGCRYPT */
2966 if (strcasecmp ("Interface", child->key) == 0)
2967 network_config_set_interface (child,
2971 WARNING ("network plugin: Option `%s' is not allowed here.",
2977 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
2978 && ((se->data.client.username == NULL)
2979 || (se->data.client.password == NULL)))
2981 ERROR ("network plugin: A security level higher than `none' was "
2982 "requested, but no Username or Password option was given. "
2983 "Cowardly refusing to open this socket!");
2984 sockent_destroy (se);
2987 #endif /* HAVE_LIBGCRYPT */
2989 status = sockent_open (se);
2992 ERROR ("network plugin: network_config_add_server: sockent_open failed.");
2993 sockent_destroy (se);
2997 status = sockent_add (se);
3000 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
3001 sockent_destroy (se);
3006 } /* }}} int network_config_add_server */
3008 static int network_config (oconfig_item_t *ci) /* {{{ */
3012 for (i = 0; i < ci->children_num; i++)
3014 oconfig_item_t *child = ci->children + i;
3016 if (strcasecmp ("Listen", child->key) == 0)
3017 network_config_add_listen (child);
3018 else if (strcasecmp ("Server", child->key) == 0)
3019 network_config_add_server (child);
3020 else if (strcasecmp ("TimeToLive", child->key) == 0)
3021 network_config_set_ttl (child);
3022 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
3023 network_config_set_buffer_size (child);
3024 else if (strcasecmp ("Forward", child->key) == 0)
3025 network_config_set_boolean (child, &network_config_forward);
3026 else if (strcasecmp ("ReportStats", child->key) == 0)
3027 network_config_set_boolean (child, &network_config_stats);
3028 else if (strcasecmp ("CacheFlush", child->key) == 0)
3029 /* no op for backwards compatibility only */;
3032 WARNING ("network plugin: Option `%s' is not allowed here.",
3038 } /* }}} int network_config */
3040 static int network_notification (const notification_t *n,
3041 user_data_t __attribute__((unused)) *user_data)
3043 char buffer[network_config_packet_size];
3044 char *buffer_ptr = buffer;
3045 int buffer_free = sizeof (buffer);
3048 memset (buffer, '\0', sizeof (buffer));
3051 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME,
3052 (uint64_t) n->time);
3056 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
3057 (uint64_t) n->severity);
3061 if (strlen (n->host) > 0)
3063 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
3064 n->host, strlen (n->host));
3069 if (strlen (n->plugin) > 0)
3071 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
3072 n->plugin, strlen (n->plugin));
3077 if (strlen (n->plugin_instance) > 0)
3079 status = write_part_string (&buffer_ptr, &buffer_free,
3080 TYPE_PLUGIN_INSTANCE,
3081 n->plugin_instance, strlen (n->plugin_instance));
3086 if (strlen (n->type) > 0)
3088 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3089 n->type, strlen (n->type));
3094 if (strlen (n->type_instance) > 0)
3096 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3097 n->type_instance, strlen (n->type_instance));
3102 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3103 n->message, strlen (n->message));
3107 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3110 } /* int network_notification */
3112 static int network_shutdown (void)
3116 /* Kill the listening thread */
3117 if (receive_thread_running != 0)
3119 INFO ("network plugin: Stopping receive thread.");
3120 pthread_kill (receive_thread_id, SIGTERM);
3121 pthread_join (receive_thread_id, NULL /* no return value */);
3122 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3123 receive_thread_running = 0;
3126 /* Shutdown the dispatching thread */
3127 if (dispatch_thread_running != 0)
3129 INFO ("network plugin: Stopping dispatch thread.");
3130 pthread_mutex_lock (&receive_list_lock);
3131 pthread_cond_broadcast (&receive_list_cond);
3132 pthread_mutex_unlock (&receive_list_lock);
3133 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3134 dispatch_thread_running = 0;
3137 sockent_destroy (listen_sockets);
3139 if (send_buffer_fill > 0)
3142 sfree (send_buffer);
3144 /* TODO: Close `sending_sockets' */
3146 plugin_unregister_config ("network");
3147 plugin_unregister_init ("network");
3148 plugin_unregister_write ("network");
3149 plugin_unregister_shutdown ("network");
3152 } /* int network_shutdown */
3154 static int network_stats_read (void) /* {{{ */
3156 uint64_t copy_octets_rx;
3157 uint64_t copy_octets_tx;
3158 uint64_t copy_packets_rx;
3159 uint64_t copy_packets_tx;
3160 uint64_t copy_values_dispatched;
3161 uint64_t copy_values_not_dispatched;
3162 uint64_t copy_values_sent;
3163 uint64_t copy_values_not_sent;
3164 uint64_t copy_receive_list_length;
3165 value_list_t vl = VALUE_LIST_INIT;
3168 copy_octets_rx = stats_octets_rx;
3169 copy_octets_tx = stats_octets_tx;
3170 copy_packets_rx = stats_packets_rx;
3171 copy_packets_tx = stats_packets_tx;
3172 copy_values_dispatched = stats_values_dispatched;
3173 copy_values_not_dispatched = stats_values_not_dispatched;
3174 copy_values_sent = stats_values_sent;
3175 copy_values_not_sent = stats_values_not_sent;
3176 copy_receive_list_length = receive_list_length;
3178 /* Initialize `vl' */
3182 vl.interval = interval_g;
3183 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3184 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3186 /* Octets received / sent */
3187 vl.values[0].counter = (counter_t) copy_octets_rx;
3188 vl.values[1].counter = (counter_t) copy_octets_tx;
3189 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3190 plugin_dispatch_values (&vl);
3192 /* Packets received / send */
3193 vl.values[0].counter = (counter_t) copy_packets_rx;
3194 vl.values[1].counter = (counter_t) copy_packets_tx;
3195 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3196 plugin_dispatch_values (&vl);
3198 /* Values (not) dispatched and (not) send */
3199 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3202 vl.values[0].derive = (derive_t) copy_values_dispatched;
3203 sstrncpy (vl.type_instance, "dispatch-accepted",
3204 sizeof (vl.type_instance));
3205 plugin_dispatch_values (&vl);
3207 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3208 sstrncpy (vl.type_instance, "dispatch-rejected",
3209 sizeof (vl.type_instance));
3210 plugin_dispatch_values (&vl);
3212 vl.values[0].derive = (derive_t) copy_values_sent;
3213 sstrncpy (vl.type_instance, "send-accepted",
3214 sizeof (vl.type_instance));
3215 plugin_dispatch_values (&vl);
3217 vl.values[0].derive = (derive_t) copy_values_not_sent;
3218 sstrncpy (vl.type_instance, "send-rejected",
3219 sizeof (vl.type_instance));
3220 plugin_dispatch_values (&vl);
3222 /* Receive queue length */
3223 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3224 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3225 vl.type_instance[0] = 0;
3226 plugin_dispatch_values (&vl);
3229 } /* }}} int network_stats_read */
3231 static int network_init (void)
3233 static _Bool have_init = false;
3235 /* Check if we were already initialized. If so, just return - there's
3236 * nothing more to do (for now, that is). */
3242 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
3243 gcry_control (GCRYCTL_INIT_SECMEM, 32768, 0);
3244 gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
3247 if (network_config_stats != 0)
3248 plugin_register_read ("network", network_stats_read);
3250 plugin_register_shutdown ("network", network_shutdown);
3252 send_buffer = malloc (network_config_packet_size);
3253 if (send_buffer == NULL)
3255 ERROR ("network plugin: malloc failed.");
3258 network_init_buffer ();
3260 /* setup socket(s) and so on */
3261 if (sending_sockets != NULL)
3263 plugin_register_write ("network", network_write,
3264 /* user_data = */ NULL);
3265 plugin_register_notification ("network", network_notification,
3266 /* user_data = */ NULL);
3269 /* If no threads need to be started, return here. */
3270 if ((listen_sockets_num == 0)
3271 || ((dispatch_thread_running != 0)
3272 && (receive_thread_running != 0)))
3275 if (dispatch_thread_running == 0)
3278 status = pthread_create (&dispatch_thread_id,
3279 NULL /* no attributes */,
3281 NULL /* no argument */);
3285 ERROR ("network: pthread_create failed: %s",
3286 sstrerror (errno, errbuf,
3291 dispatch_thread_running = 1;
3295 if (receive_thread_running == 0)
3298 status = pthread_create (&receive_thread_id,
3299 NULL /* no attributes */,
3301 NULL /* no argument */);
3305 ERROR ("network: pthread_create failed: %s",
3306 sstrerror (errno, errbuf,
3311 receive_thread_running = 1;
3316 } /* int network_init */
3319 * The flush option of the network plugin cannot flush individual identifiers.
3320 * All the values are added to a buffer and sent when the buffer is full, the
3321 * requested value may or may not be in there, it's not worth finding out. We
3322 * just send the buffer if `flush' is called - if the requested value was in
3323 * there, good. If not, well, then there is nothing to flush.. -octo
3325 static int network_flush (int timeout,
3326 const char __attribute__((unused)) *identifier,
3327 user_data_t __attribute__((unused)) *user_data)
3329 pthread_mutex_lock (&send_buffer_lock);
3331 if (send_buffer_fill > 0)
3334 pthread_mutex_unlock (&send_buffer_lock);
3337 } /* int network_flush */
3339 void module_register (void)
3341 plugin_register_complex_config ("network", network_config);
3342 plugin_register_init ("network", network_init);
3343 plugin_register_flush ("network", network_flush,
3344 /* user_data = */ NULL);
3345 } /* void module_register */
3347 /* vim: set fdm=marker : */