2 * collectd - src/network.c
3 * Copyright (C) 2005-2013 Florian octo Forster
4 * Copyright (C) 2009 Aman Gupta
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU Lesser General Public License as published by
8 * the Free Software Foundation; only version 2.1 of the License is
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 * Florian octo Forster <octo at collectd.org>
22 * Aman Gupta <aman at tmm1.net>
25 #define _BSD_SOURCE /* For struct ip_mreq */
30 #include "configfile.h"
31 #include "utils_fbhash.h"
32 #include "utils_avltree.h"
33 #include "utils_cache.h"
34 #include "utils_complain.h"
42 # include <sys/socket.h>
48 # include <netinet/in.h>
51 # include <arpa/inet.h>
62 # if defined __APPLE__
63 /* default xcode compiler throws warnings even when deprecated functionality
64 * is not used. -Werror breaks the build because of erroneous warnings.
65 * http://stackoverflow.com/questions/10556299/compiler-warnings-with-libgcrypt-v1-5-0/12830209#12830209
67 # pragma GCC diagnostic ignored "-Wdeprecated-declarations"
69 /* FreeBSD's copy of libgcrypt extends the existing GCRYPT_NO_DEPRECATED
70 * to properly hide all deprecated functionality.
71 * http://svnweb.freebsd.org/ports/head/security/libgcrypt/files/patch-src__gcrypt.h.in
73 # define GCRYPT_NO_DEPRECATED
75 # if defined __APPLE__
76 /* Re enable deprecation warnings */
77 # pragma GCC diagnostic warning "-Wdeprecated-declarations"
79 GCRY_THREAD_OPTION_PTHREAD_IMPL;
82 #ifndef IPV6_ADD_MEMBERSHIP
83 # ifdef IPV6_JOIN_GROUP
84 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
86 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
88 #endif /* !IP_ADD_MEMBERSHIP */
91 * Maximum size required for encryption / signing:
93 * 42 bytes for the encryption header
94 * + 64 bytes for the username
98 #define BUFF_SIG_SIZE 106
103 #define SECURITY_LEVEL_NONE 0
105 # define SECURITY_LEVEL_SIGN 1
106 # define SECURITY_LEVEL_ENCRYPT 2
108 struct sockent_client
111 struct sockaddr_storage *addr;
117 gcry_cipher_hd_t cypher;
118 unsigned char password_hash[32];
122 struct sockent_server
130 gcry_cipher_hd_t cypher;
134 typedef struct sockent
136 #define SOCKENT_TYPE_CLIENT 1
137 #define SOCKENT_TYPE_SERVER 2
146 struct sockent_client client;
147 struct sockent_server server;
150 struct sockent *next;
153 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
154 * 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
155 * +-------+-----------------------+-------------------------------+
156 * ! Ver. ! ! Length !
157 * +-------+-----------------------+-------------------------------+
164 typedef struct part_header_s part_header_t;
166 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
167 * 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
168 * +-------------------------------+-------------------------------+
170 * +-------------------------------+-------------------------------+
171 * : (Length - 4) Bytes :
172 * +---------------------------------------------------------------+
179 typedef struct part_string_s part_string_t;
181 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
182 * 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
183 * +-------------------------------+-------------------------------+
185 * +-------------------------------+-------------------------------+
186 * : (Length - 4 == 2 || 4 || 8) Bytes :
187 * +---------------------------------------------------------------+
194 typedef struct part_number_s part_number_t;
196 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
197 * 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
198 * +-------------------------------+-------------------------------+
200 * +-------------------------------+---------------+---------------+
201 * ! Num of values ! Type0 ! Type1 !
202 * +-------------------------------+---------------+---------------+
205 * +---------------------------------------------------------------+
208 * +---------------------------------------------------------------+
213 uint16_t *num_values;
214 uint8_t *values_types;
217 typedef struct part_values_s part_values_t;
219 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
220 * 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
221 * +-------------------------------+-------------------------------+
223 * +-------------------------------+-------------------------------+
224 * ! Hash (Bits 0 - 31) !
226 * ! Hash (Bits 224 - 255) !
227 * +---------------------------------------------------------------+
230 #define PART_SIGNATURE_SHA256_SIZE 36
231 struct part_signature_sha256_s
234 unsigned char hash[32];
237 typedef struct part_signature_sha256_s part_signature_sha256_t;
239 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
240 * 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
241 * +-------------------------------+-------------------------------+
243 * +-------------------------------+-------------------------------+
244 * ! Original length ! Padding (0 - 15 bytes) !
245 * +-------------------------------+-------------------------------+
246 * ! Hash (Bits 0 - 31) !
248 * ! Hash (Bits 128 - 159) !
249 * +---------------------------------------------------------------+
252 #define PART_ENCRYPTION_AES256_SIZE 42
253 struct part_encryption_aes256_s
256 uint16_t username_length;
258 unsigned char iv[16];
260 unsigned char hash[20];
264 typedef struct part_encryption_aes256_s part_encryption_aes256_t;
266 struct receive_list_entry_s
271 struct receive_list_entry_s *next;
273 typedef struct receive_list_entry_s receive_list_entry_t;
278 static int network_config_ttl = 0;
279 /* Ethernet - (IPv6 + UDP) = 1500 - (40 + 8) = 1452 */
280 static size_t network_config_packet_size = 1452;
281 static int network_config_forward = 0;
282 static int network_config_stats = 0;
284 static sockent_t *sending_sockets = NULL;
286 static receive_list_entry_t *receive_list_head = NULL;
287 static receive_list_entry_t *receive_list_tail = NULL;
288 static pthread_mutex_t receive_list_lock = PTHREAD_MUTEX_INITIALIZER;
289 static pthread_cond_t receive_list_cond = PTHREAD_COND_INITIALIZER;
290 static uint64_t receive_list_length = 0;
292 static sockent_t *listen_sockets = NULL;
293 static struct pollfd *listen_sockets_pollfd = NULL;
294 static size_t listen_sockets_num = 0;
296 /* The receive and dispatch threads will run as long as `listen_loop' is set to
298 static int listen_loop = 0;
299 static int receive_thread_running = 0;
300 static pthread_t receive_thread_id;
301 static int dispatch_thread_running = 0;
302 static pthread_t dispatch_thread_id;
304 /* Buffer in which to-be-sent network packets are constructed. */
305 static char *send_buffer;
306 static char *send_buffer_ptr;
307 static int send_buffer_fill;
308 static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
309 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
311 /* XXX: These counters are incremented from one place only. The spot in which
312 * the values are incremented is either only reachable by one thread (the
313 * dispatch thread, for example) or locked by some lock (send_buffer_lock for
314 * example). Only if neither is true, the stats_lock is acquired. The counters
315 * are always read without holding a lock in the hope that writing 8 bytes to
316 * memory is an atomic operation. */
317 static derive_t stats_octets_rx = 0;
318 static derive_t stats_octets_tx = 0;
319 static derive_t stats_packets_rx = 0;
320 static derive_t stats_packets_tx = 0;
321 static derive_t stats_values_dispatched = 0;
322 static derive_t stats_values_not_dispatched = 0;
323 static derive_t stats_values_sent = 0;
324 static derive_t stats_values_not_sent = 0;
325 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
330 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
332 uint64_t time_sent = 0;
335 status = uc_meta_data_get_unsigned_int (vl,
336 "network:time_sent", &time_sent);
338 /* This is a value we already sent. Don't allow it to be received again in
339 * order to avoid looping. */
340 if ((status == 0) && (time_sent >= ((uint64_t) vl->time)))
344 } /* }}} _Bool check_receive_okay */
346 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
351 if (network_config_forward != 0)
354 if (vl->meta == NULL)
357 status = meta_data_get_boolean (vl->meta, "network:received", &received);
358 if (status == -ENOENT)
360 else if (status != 0)
362 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
363 "with status %i.", status);
367 /* By default, only *send* value lists that were not *received* by the
370 } /* }}} _Bool check_send_okay */
372 static _Bool check_notify_received (const notification_t *n) /* {{{ */
374 notification_meta_t *ptr;
376 for (ptr = n->meta; ptr != NULL; ptr = ptr->next)
377 if ((strcmp ("network:received", ptr->name) == 0)
378 && (ptr->type == NM_TYPE_BOOLEAN))
379 return ((_Bool) ptr->nm_value.nm_boolean);
382 } /* }}} _Bool check_notify_received */
384 static _Bool check_send_notify_okay (const notification_t *n) /* {{{ */
386 static c_complain_t complain_forwarding = C_COMPLAIN_INIT_STATIC;
392 received = check_notify_received (n);
394 if (network_config_forward && received)
396 c_complain_once (LOG_ERR, &complain_forwarding,
397 "network plugin: A notification has been received via the network "
398 "forwarding if enabled. Forwarding of notifications is currently "
399 "not supported, because there is not loop-deteciton available. "
400 "Please contact the collectd mailing list if you need this "
404 /* By default, only *send* value lists that were not *received* by the
407 } /* }}} _Bool check_send_notify_okay */
409 static int network_dispatch_values (value_list_t *vl, /* {{{ */
410 const char *username)
415 || (strlen (vl->host) <= 0)
416 || (strlen (vl->plugin) <= 0)
417 || (strlen (vl->type) <= 0))
420 if (!check_receive_okay (vl))
423 char name[6*DATA_MAX_NAME_LEN];
424 FORMAT_VL (name, sizeof (name), vl);
425 name[sizeof (name) - 1] = 0;
426 DEBUG ("network plugin: network_dispatch_values: "
427 "NOT dispatching %s.", name);
429 stats_values_not_dispatched++;
433 assert (vl->meta == NULL);
435 vl->meta = meta_data_create ();
436 if (vl->meta == NULL)
438 ERROR ("network plugin: meta_data_create failed.");
442 status = meta_data_add_boolean (vl->meta, "network:received", 1);
445 ERROR ("network plugin: meta_data_add_boolean failed.");
446 meta_data_destroy (vl->meta);
451 if (username != NULL)
453 status = meta_data_add_string (vl->meta, "network:username", username);
456 ERROR ("network plugin: meta_data_add_string failed.");
457 meta_data_destroy (vl->meta);
463 plugin_dispatch_values (vl);
464 stats_values_dispatched++;
466 meta_data_destroy (vl->meta);
470 } /* }}} int network_dispatch_values */
472 static int network_dispatch_notification (notification_t *n) /* {{{ */
476 assert (n->meta == NULL);
478 status = plugin_notification_meta_add_boolean (n, "network:received", 1);
481 ERROR ("network plugin: plugin_notification_meta_add_boolean failed.");
482 plugin_notification_meta_free (n->meta);
487 status = plugin_dispatch_notification (n);
489 plugin_notification_meta_free (n->meta);
493 } /* }}} int network_dispatch_notification */
496 static void network_init_gcrypt (void) /* {{{ */
498 /* http://lists.gnupg.org/pipermail/gcrypt-devel/2003-August/000458.html
499 * Because you can't know in a library whether another library has
500 * already initialized the library */
501 if (gcry_control (GCRYCTL_ANY_INITIALIZATION_P))
504 /* http://www.gnupg.org/documentation/manuals/gcrypt/Multi_002dThreading.html
505 * To ensure thread-safety, it's important to set GCRYCTL_SET_THREAD_CBS
506 * *before* initalizing Libgcrypt with gcry_check_version(), which itself must
507 * be called before any other gcry_* function. GCRYCTL_ANY_INITIALIZATION_P
508 * above doesn't count, as it doesn't implicitly initalize Libgcrypt.
510 * tl;dr: keep all these gry_* statements in this exact order please. */
511 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
512 gcry_check_version (NULL);
513 gcry_control (GCRYCTL_INIT_SECMEM, 32768);
514 gcry_control (GCRYCTL_INITIALIZATION_FINISHED);
515 } /* }}} void network_init_gcrypt */
517 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
518 const void *iv, size_t iv_size, const char *username)
521 gcry_cipher_hd_t *cyper_ptr;
522 unsigned char password_hash[32];
524 if (se->type == SOCKENT_TYPE_CLIENT)
526 cyper_ptr = &se->data.client.cypher;
527 memcpy (password_hash, se->data.client.password_hash,
528 sizeof (password_hash));
534 cyper_ptr = &se->data.server.cypher;
536 if (username == NULL)
539 secret = fbh_get (se->data.server.userdb, username);
543 gcry_md_hash_buffer (GCRY_MD_SHA256,
545 secret, strlen (secret));
550 if (*cyper_ptr == NULL)
552 err = gcry_cipher_open (cyper_ptr,
553 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
556 ERROR ("network plugin: gcry_cipher_open returned: %s",
557 gcry_strerror (err));
564 gcry_cipher_reset (*cyper_ptr);
566 assert (*cyper_ptr != NULL);
568 err = gcry_cipher_setkey (*cyper_ptr,
569 password_hash, sizeof (password_hash));
572 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
573 gcry_strerror (err));
574 gcry_cipher_close (*cyper_ptr);
579 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
582 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
583 gcry_strerror (err));
584 gcry_cipher_close (*cyper_ptr);
590 } /* }}} int network_get_aes256_cypher */
591 #endif /* HAVE_LIBGCRYPT */
593 static int write_part_values (char **ret_buffer, int *ret_buffer_len,
594 const data_set_t *ds, const value_list_t *vl)
600 part_header_t pkg_ph;
601 uint16_t pkg_num_values;
602 uint8_t *pkg_values_types;
608 num_values = vl->values_len;
609 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
610 + (num_values * sizeof (uint8_t))
611 + (num_values * sizeof (value_t));
613 if (*ret_buffer_len < packet_len)
616 pkg_values_types = (uint8_t *) malloc (num_values * sizeof (uint8_t));
617 if (pkg_values_types == NULL)
619 ERROR ("network plugin: write_part_values: malloc failed.");
623 pkg_values = (value_t *) malloc (num_values * sizeof (value_t));
624 if (pkg_values == NULL)
626 free (pkg_values_types);
627 ERROR ("network plugin: write_part_values: malloc failed.");
631 pkg_ph.type = htons (TYPE_VALUES);
632 pkg_ph.length = htons (packet_len);
634 pkg_num_values = htons ((uint16_t) vl->values_len);
636 for (i = 0; i < num_values; i++)
638 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
639 switch (ds->ds[i].type)
641 case DS_TYPE_COUNTER:
642 pkg_values[i].counter = htonll (vl->values[i].counter);
646 pkg_values[i].gauge = htond (vl->values[i].gauge);
650 pkg_values[i].derive = htonll (vl->values[i].derive);
653 case DS_TYPE_ABSOLUTE:
654 pkg_values[i].absolute = htonll (vl->values[i].absolute);
658 free (pkg_values_types);
660 ERROR ("network plugin: write_part_values: "
661 "Unknown data source type: %i",
664 } /* switch (ds->ds[i].type) */
665 } /* for (num_values) */
668 * Use `memcpy' to write everything to the buffer, because the pointer
669 * may be unaligned and some architectures, such as SPARC, can't handle
672 packet_ptr = *ret_buffer;
674 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
675 offset += sizeof (pkg_ph);
676 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
677 offset += sizeof (pkg_num_values);
678 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
679 offset += num_values * sizeof (uint8_t);
680 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
681 offset += num_values * sizeof (value_t);
683 assert (offset == packet_len);
685 *ret_buffer = packet_ptr + packet_len;
686 *ret_buffer_len -= packet_len;
688 free (pkg_values_types);
692 } /* int write_part_values */
694 static int write_part_number (char **ret_buffer, int *ret_buffer_len,
695 int type, uint64_t value)
700 part_header_t pkg_head;
705 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
707 if (*ret_buffer_len < packet_len)
710 pkg_head.type = htons (type);
711 pkg_head.length = htons (packet_len);
712 pkg_value = htonll (value);
714 packet_ptr = *ret_buffer;
716 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
717 offset += sizeof (pkg_head);
718 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
719 offset += sizeof (pkg_value);
721 assert (offset == packet_len);
723 *ret_buffer = packet_ptr + packet_len;
724 *ret_buffer_len -= packet_len;
727 } /* int write_part_number */
729 static int write_part_string (char **ret_buffer, int *ret_buffer_len,
730 int type, const char *str, int str_len)
740 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
741 if (*ret_buffer_len < buffer_len)
744 pkg_type = htons (type);
745 pkg_length = htons (buffer_len);
747 buffer = *ret_buffer;
749 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
750 offset += sizeof (pkg_type);
751 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
752 offset += sizeof (pkg_length);
753 memcpy (buffer + offset, str, str_len);
755 memset (buffer + offset, '\0', 1);
758 assert (offset == buffer_len);
760 *ret_buffer = buffer + buffer_len;
761 *ret_buffer_len -= buffer_len;
764 } /* int write_part_string */
766 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
767 value_t **ret_values, int *ret_num_values)
769 char *buffer = *ret_buffer;
770 size_t buffer_len = *ret_buffer_len;
785 NOTICE ("network plugin: packet is too short: "
786 "buffer_len = %zu", buffer_len);
790 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
791 buffer += sizeof (tmp16);
792 pkg_type = ntohs (tmp16);
794 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
795 buffer += sizeof (tmp16);
796 pkg_length = ntohs (tmp16);
798 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
799 buffer += sizeof (tmp16);
800 pkg_numval = ntohs (tmp16);
802 assert (pkg_type == TYPE_VALUES);
804 exp_size = 3 * sizeof (uint16_t)
805 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
806 if (buffer_len < exp_size)
808 WARNING ("network plugin: parse_part_values: "
810 "Chunk of size %zu expected, "
811 "but buffer has only %zu bytes left.",
812 exp_size, buffer_len);
816 if (pkg_length != exp_size)
818 WARNING ("network plugin: parse_part_values: "
819 "Length and number of values "
820 "in the packet don't match.");
824 pkg_types = (uint8_t *) malloc (pkg_numval * sizeof (uint8_t));
825 pkg_values = (value_t *) malloc (pkg_numval * sizeof (value_t));
826 if ((pkg_types == NULL) || (pkg_values == NULL))
830 ERROR ("network plugin: parse_part_values: malloc failed.");
834 memcpy ((void *) pkg_types, (void *) buffer, pkg_numval * sizeof (uint8_t));
835 buffer += pkg_numval * sizeof (uint8_t);
836 memcpy ((void *) pkg_values, (void *) buffer, pkg_numval * sizeof (value_t));
837 buffer += pkg_numval * sizeof (value_t);
839 for (i = 0; i < pkg_numval; i++)
841 switch (pkg_types[i])
843 case DS_TYPE_COUNTER:
844 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
848 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
852 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
855 case DS_TYPE_ABSOLUTE:
856 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
860 NOTICE ("network plugin: parse_part_values: "
861 "Don't know how to handle data source type %"PRIu8,
866 } /* switch (pkg_types[i]) */
869 *ret_buffer = buffer;
870 *ret_buffer_len = buffer_len - pkg_length;
871 *ret_num_values = pkg_numval;
872 *ret_values = pkg_values;
877 } /* int parse_part_values */
879 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
882 char *buffer = *ret_buffer;
883 size_t buffer_len = *ret_buffer_len;
887 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
891 if (buffer_len < exp_size)
893 WARNING ("network plugin: parse_part_number: "
895 "Chunk of size %zu expected, "
896 "but buffer has only %zu bytes left.",
897 exp_size, buffer_len);
901 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
902 buffer += sizeof (tmp16);
903 /* pkg_type = ntohs (tmp16); */
905 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
906 buffer += sizeof (tmp16);
907 pkg_length = ntohs (tmp16);
909 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
910 buffer += sizeof (tmp64);
911 *value = ntohll (tmp64);
913 *ret_buffer = buffer;
914 *ret_buffer_len = buffer_len - pkg_length;
917 } /* int parse_part_number */
919 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
920 char *output, int output_len)
922 char *buffer = *ret_buffer;
923 size_t buffer_len = *ret_buffer_len;
926 size_t header_size = 2 * sizeof (uint16_t);
930 if (buffer_len < header_size)
932 WARNING ("network plugin: parse_part_string: "
934 "Chunk of at least size %zu expected, "
935 "but buffer has only %zu bytes left.",
936 header_size, buffer_len);
940 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
941 buffer += sizeof (tmp16);
942 /* pkg_type = ntohs (tmp16); */
944 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
945 buffer += sizeof (tmp16);
946 pkg_length = ntohs (tmp16);
948 /* Check that packet fits in the input buffer */
949 if (pkg_length > buffer_len)
951 WARNING ("network plugin: parse_part_string: "
953 "Chunk of size %"PRIu16" received, "
954 "but buffer has only %zu bytes left.",
955 pkg_length, buffer_len);
959 /* Check that pkg_length is in the valid range */
960 if (pkg_length <= header_size)
962 WARNING ("network plugin: parse_part_string: "
964 "Header claims this packet is only %hu "
965 "bytes long.", pkg_length);
969 /* Check that the package data fits into the output buffer.
970 * The previous if-statement ensures that:
971 * `pkg_length > header_size' */
973 || ((size_t) output_len < ((size_t) pkg_length - header_size)))
975 WARNING ("network plugin: parse_part_string: "
976 "Output buffer too small.");
980 /* All sanity checks successfull, let's copy the data over */
981 output_len = pkg_length - header_size;
982 memcpy ((void *) output, (void *) buffer, output_len);
983 buffer += output_len;
985 /* For some very weird reason '\0' doesn't do the trick on SPARC in
987 if (output[output_len - 1] != 0)
989 WARNING ("network plugin: parse_part_string: "
990 "Received string does not end "
991 "with a NULL-byte.");
995 *ret_buffer = buffer;
996 *ret_buffer_len = buffer_len - pkg_length;
999 } /* int parse_part_string */
1001 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
1002 * parse_packet and vice versa. */
1003 #define PP_SIGNED 0x01
1004 #define PP_ENCRYPTED 0x02
1005 static int parse_packet (sockent_t *se,
1006 void *buffer, size_t buffer_size, int flags,
1007 const char *username);
1009 #define BUFFER_READ(p,s) do { \
1010 memcpy ((p), buffer + buffer_offset, (s)); \
1011 buffer_offset += (s); \
1015 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1016 void **ret_buffer, size_t *ret_buffer_len, int flags)
1018 static c_complain_t complain_no_users = C_COMPLAIN_INIT_STATIC;
1022 size_t buffer_offset;
1024 size_t username_len;
1027 part_signature_sha256_t pss;
1028 uint16_t pss_head_length;
1029 char hash[sizeof (pss.hash)];
1033 unsigned char *hash_ptr;
1035 buffer = *ret_buffer;
1036 buffer_len = *ret_buffer_len;
1039 if (se->data.server.userdb == NULL)
1041 c_complain (LOG_NOTICE, &complain_no_users,
1042 "network plugin: Received signed network packet but can't verify it "
1043 "because no user DB has been configured. Will accept it.");
1047 /* Check if the buffer has enough data for this structure. */
1048 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
1051 /* Read type and length header */
1052 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1053 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1054 pss_head_length = ntohs (pss.head.length);
1056 /* Check if the `pss_head_length' is within bounds. */
1057 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
1058 || (pss_head_length > buffer_len))
1060 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
1064 /* Copy the hash. */
1065 BUFFER_READ (pss.hash, sizeof (pss.hash));
1067 /* Calculate username length (without null byte) and allocate memory */
1068 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
1069 pss.username = malloc (username_len + 1);
1070 if (pss.username == NULL)
1073 /* Read the username */
1074 BUFFER_READ (pss.username, username_len);
1075 pss.username[username_len] = 0;
1077 assert (buffer_offset == pss_head_length);
1079 /* Query the password */
1080 secret = fbh_get (se->data.server.userdb, pss.username);
1083 ERROR ("network plugin: Unknown user: %s", pss.username);
1084 sfree (pss.username);
1088 /* Create a hash device and check the HMAC */
1090 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
1093 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
1094 gcry_strerror (err));
1096 sfree (pss.username);
1100 err = gcry_md_setkey (hd, secret, strlen (secret));
1103 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
1106 sfree (pss.username);
1111 buffer + PART_SIGNATURE_SHA256_SIZE,
1112 buffer_len - PART_SIGNATURE_SHA256_SIZE);
1113 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
1114 if (hash_ptr == NULL)
1116 ERROR ("network plugin: gcry_md_read failed.");
1119 sfree (pss.username);
1122 memcpy (hash, hash_ptr, sizeof (hash));
1128 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1130 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1135 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1136 flags | PP_SIGNED, pss.username);
1140 sfree (pss.username);
1142 *ret_buffer = buffer + buffer_len;
1143 *ret_buffer_len = 0;
1146 } /* }}} int parse_part_sign_sha256 */
1147 /* #endif HAVE_LIBGCRYPT */
1149 #else /* if !HAVE_LIBGCRYPT */
1150 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1151 void **ret_buffer, size_t *ret_buffer_size, int flags)
1153 static int warning_has_been_printed = 0;
1157 size_t buffer_offset;
1160 part_signature_sha256_t pss;
1162 buffer = *ret_buffer;
1163 buffer_size = *ret_buffer_size;
1166 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1169 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1170 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1171 part_len = ntohs (pss.head.length);
1173 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1174 || (part_len > buffer_size))
1177 if (warning_has_been_printed == 0)
1179 WARNING ("network plugin: Received signed packet, but the network "
1180 "plugin was not linked with libgcrypt, so I cannot "
1181 "verify the signature. The packet will be accepted.");
1182 warning_has_been_printed = 1;
1185 parse_packet (se, buffer + part_len, buffer_size - part_len, flags,
1186 /* username = */ NULL);
1188 *ret_buffer = buffer + buffer_size;
1189 *ret_buffer_size = 0;
1192 } /* }}} int parse_part_sign_sha256 */
1193 #endif /* !HAVE_LIBGCRYPT */
1196 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1197 void **ret_buffer, size_t *ret_buffer_len,
1200 char *buffer = *ret_buffer;
1201 size_t buffer_len = *ret_buffer_len;
1204 size_t buffer_offset;
1205 uint16_t username_len;
1206 part_encryption_aes256_t pea;
1207 unsigned char hash[sizeof (pea.hash)];
1209 gcry_cipher_hd_t cypher;
1212 /* Make sure at least the header if available. */
1213 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1215 NOTICE ("network plugin: parse_part_encr_aes256: "
1216 "Discarding short packet.");
1222 /* Copy the unencrypted information into `pea'. */
1223 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1224 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1226 /* Check the `part size'. */
1227 part_size = ntohs (pea.head.length);
1228 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1229 || (part_size > buffer_len))
1231 NOTICE ("network plugin: parse_part_encr_aes256: "
1232 "Discarding part with invalid size.");
1236 /* Read the username */
1237 BUFFER_READ (&username_len, sizeof (username_len));
1238 username_len = ntohs (username_len);
1240 if ((username_len <= 0)
1241 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1243 NOTICE ("network plugin: parse_part_encr_aes256: "
1244 "Discarding part with invalid username length.");
1248 assert (username_len > 0);
1249 pea.username = malloc (username_len + 1);
1250 if (pea.username == NULL)
1252 BUFFER_READ (pea.username, username_len);
1253 pea.username[username_len] = 0;
1255 /* Last but not least, the initialization vector */
1256 BUFFER_READ (pea.iv, sizeof (pea.iv));
1258 /* Make sure we are at the right position */
1259 assert (buffer_offset == (username_len +
1260 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1262 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1266 sfree (pea.username);
1270 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1271 assert (payload_len > 0);
1273 /* Decrypt the packet in-place */
1274 err = gcry_cipher_decrypt (cypher,
1275 buffer + buffer_offset,
1276 part_size - buffer_offset,
1277 /* in = */ NULL, /* in len = */ 0);
1280 sfree (pea.username);
1281 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1282 gcry_strerror (err));
1287 BUFFER_READ (pea.hash, sizeof (pea.hash));
1289 /* Make sure we're at the right position - again */
1290 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1291 assert (buffer_offset == (part_size - payload_len));
1293 /* Check hash sum */
1294 memset (hash, 0, sizeof (hash));
1295 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1296 buffer + buffer_offset, payload_len);
1297 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1299 sfree (pea.username);
1300 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1304 parse_packet (se, buffer + buffer_offset, payload_len,
1305 flags | PP_ENCRYPTED, pea.username);
1307 /* XXX: Free pea.username?!? */
1309 /* Update return values */
1310 *ret_buffer = buffer + part_size;
1311 *ret_buffer_len = buffer_len - part_size;
1313 sfree (pea.username);
1316 } /* }}} int parse_part_encr_aes256 */
1317 /* #endif HAVE_LIBGCRYPT */
1319 #else /* if !HAVE_LIBGCRYPT */
1320 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1321 void **ret_buffer, size_t *ret_buffer_size, int flags)
1323 static int warning_has_been_printed = 0;
1327 size_t buffer_offset;
1332 buffer = *ret_buffer;
1333 buffer_size = *ret_buffer_size;
1336 /* parse_packet assures this minimum size. */
1337 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1339 BUFFER_READ (&ph.type, sizeof (ph.type));
1340 BUFFER_READ (&ph.length, sizeof (ph.length));
1341 ph_length = ntohs (ph.length);
1343 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1344 || (ph_length > buffer_size))
1346 ERROR ("network plugin: AES-256 encrypted part "
1347 "with invalid length received.");
1351 if (warning_has_been_printed == 0)
1353 WARNING ("network plugin: Received encrypted packet, but the network "
1354 "plugin was not linked with libgcrypt, so I cannot "
1355 "decrypt it. The part will be discarded.");
1356 warning_has_been_printed = 1;
1359 *ret_buffer += ph_length;
1360 *ret_buffer_size -= ph_length;
1363 } /* }}} int parse_part_encr_aes256 */
1364 #endif /* !HAVE_LIBGCRYPT */
1368 static int parse_packet (sockent_t *se, /* {{{ */
1369 void *buffer, size_t buffer_size, int flags,
1370 const char *username)
1374 value_list_t vl = VALUE_LIST_INIT;
1378 int packet_was_signed = (flags & PP_SIGNED);
1379 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1380 int printed_ignore_warning = 0;
1381 #endif /* HAVE_LIBGCRYPT */
1384 memset (&vl, '\0', sizeof (vl));
1385 memset (&n, '\0', sizeof (n));
1388 while ((status == 0) && (0 < buffer_size)
1389 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1391 uint16_t pkg_length;
1394 memcpy ((void *) &pkg_type,
1397 memcpy ((void *) &pkg_length,
1398 (void *) (buffer + sizeof (pkg_type)),
1399 sizeof (pkg_length));
1401 pkg_length = ntohs (pkg_length);
1402 pkg_type = ntohs (pkg_type);
1404 if (pkg_length > buffer_size)
1406 /* Ensure that this loop terminates eventually */
1407 if (pkg_length < (2 * sizeof (uint16_t)))
1410 if (pkg_type == TYPE_ENCR_AES256)
1412 status = parse_part_encr_aes256 (se,
1413 &buffer, &buffer_size, flags);
1416 ERROR ("network plugin: Decrypting AES256 "
1418 "with status %i.", status);
1423 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1424 && (packet_was_encrypted == 0))
1426 if (printed_ignore_warning == 0)
1428 INFO ("network plugin: Unencrypted packet or "
1429 "part has been ignored.");
1430 printed_ignore_warning = 1;
1432 buffer = ((char *) buffer) + pkg_length;
1435 #endif /* HAVE_LIBGCRYPT */
1436 else if (pkg_type == TYPE_SIGN_SHA256)
1438 status = parse_part_sign_sha256 (se,
1439 &buffer, &buffer_size, flags);
1442 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1444 "with status %i.", status);
1449 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1450 && (packet_was_encrypted == 0)
1451 && (packet_was_signed == 0))
1453 if (printed_ignore_warning == 0)
1455 INFO ("network plugin: Unsigned packet or "
1456 "part has been ignored.");
1457 printed_ignore_warning = 1;
1459 buffer = ((char *) buffer) + pkg_length;
1462 #endif /* HAVE_LIBGCRYPT */
1463 else if (pkg_type == TYPE_VALUES)
1465 status = parse_part_values (&buffer, &buffer_size,
1466 &vl.values, &vl.values_len);
1470 network_dispatch_values (&vl, username);
1474 else if (pkg_type == TYPE_TIME)
1477 status = parse_part_number (&buffer, &buffer_size,
1481 vl.time = TIME_T_TO_CDTIME_T (tmp);
1482 n.time = TIME_T_TO_CDTIME_T (tmp);
1485 else if (pkg_type == TYPE_TIME_HR)
1488 status = parse_part_number (&buffer, &buffer_size,
1492 vl.time = (cdtime_t) tmp;
1493 n.time = (cdtime_t) tmp;
1496 else if (pkg_type == TYPE_INTERVAL)
1499 status = parse_part_number (&buffer, &buffer_size,
1502 vl.interval = TIME_T_TO_CDTIME_T (tmp);
1504 else if (pkg_type == TYPE_INTERVAL_HR)
1507 status = parse_part_number (&buffer, &buffer_size,
1510 vl.interval = (cdtime_t) tmp;
1512 else if (pkg_type == TYPE_HOST)
1514 status = parse_part_string (&buffer, &buffer_size,
1515 vl.host, sizeof (vl.host));
1517 sstrncpy (n.host, vl.host, sizeof (n.host));
1519 else if (pkg_type == TYPE_PLUGIN)
1521 status = parse_part_string (&buffer, &buffer_size,
1522 vl.plugin, sizeof (vl.plugin));
1524 sstrncpy (n.plugin, vl.plugin,
1527 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1529 status = parse_part_string (&buffer, &buffer_size,
1531 sizeof (vl.plugin_instance));
1533 sstrncpy (n.plugin_instance,
1535 sizeof (n.plugin_instance));
1537 else if (pkg_type == TYPE_TYPE)
1539 status = parse_part_string (&buffer, &buffer_size,
1540 vl.type, sizeof (vl.type));
1542 sstrncpy (n.type, vl.type, sizeof (n.type));
1544 else if (pkg_type == TYPE_TYPE_INSTANCE)
1546 status = parse_part_string (&buffer, &buffer_size,
1548 sizeof (vl.type_instance));
1550 sstrncpy (n.type_instance, vl.type_instance,
1551 sizeof (n.type_instance));
1553 else if (pkg_type == TYPE_MESSAGE)
1555 status = parse_part_string (&buffer, &buffer_size,
1556 n.message, sizeof (n.message));
1562 else if ((n.severity != NOTIF_FAILURE)
1563 && (n.severity != NOTIF_WARNING)
1564 && (n.severity != NOTIF_OKAY))
1566 INFO ("network plugin: "
1567 "Ignoring notification with "
1568 "unknown severity %i.",
1571 else if (n.time <= 0)
1573 INFO ("network plugin: "
1574 "Ignoring notification with "
1577 else if (strlen (n.message) <= 0)
1579 INFO ("network plugin: "
1580 "Ignoring notification with "
1581 "an empty message.");
1585 network_dispatch_notification (&n);
1588 else if (pkg_type == TYPE_SEVERITY)
1591 status = parse_part_number (&buffer, &buffer_size,
1594 n.severity = (int) tmp;
1598 DEBUG ("network plugin: parse_packet: Unknown part"
1599 " type: 0x%04hx", pkg_type);
1600 buffer = ((char *) buffer) + pkg_length;
1602 } /* while (buffer_size > sizeof (part_header_t)) */
1604 if (status == 0 && buffer_size > 0)
1605 WARNING ("network plugin: parse_packet: Received truncated "
1606 "packet, try increasing `MaxPacketSize'");
1609 } /* }}} int parse_packet */
1611 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1620 sfree (sec->username);
1621 sfree (sec->password);
1622 if (sec->cypher != NULL)
1623 gcry_cipher_close (sec->cypher);
1625 } /* }}} void free_sockent_client */
1627 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1631 for (i = 0; i < ses->fd_num; i++)
1633 if (ses->fd[i] >= 0)
1642 sfree (ses->auth_file);
1643 fbh_destroy (ses->userdb);
1644 if (ses->cypher != NULL)
1645 gcry_cipher_close (ses->cypher);
1647 } /* }}} void free_sockent_server */
1649 static void sockent_destroy (sockent_t *se) /* {{{ */
1653 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1660 sfree (se->service);
1662 if (se->type == SOCKENT_TYPE_CLIENT)
1663 free_sockent_client (&se->data.client);
1665 free_sockent_server (&se->data.server);
1670 } /* }}} void sockent_destroy */
1673 * int network_set_ttl
1675 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1676 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1678 * The `struct addrinfo' is used to destinguish between unicast and multicast
1681 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1683 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1684 network_config_ttl);
1686 assert (se->type == SOCKENT_TYPE_CLIENT);
1688 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1691 if (ai->ai_family == AF_INET)
1693 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1696 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1697 optname = IP_MULTICAST_TTL;
1701 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1702 &network_config_ttl,
1703 sizeof (network_config_ttl)) != 0)
1706 ERROR ("network plugin: setsockopt (ipv4-ttl): %s",
1707 sstrerror (errno, errbuf, sizeof (errbuf)));
1711 else if (ai->ai_family == AF_INET6)
1713 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1714 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1717 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1718 optname = IPV6_MULTICAST_HOPS;
1720 optname = IPV6_UNICAST_HOPS;
1722 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1723 &network_config_ttl,
1724 sizeof (network_config_ttl)) != 0)
1727 ERROR ("network plugin: setsockopt(ipv6-ttl): %s",
1728 sstrerror (errno, errbuf,
1735 } /* int network_set_ttl */
1737 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1739 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1742 assert (se->type == SOCKENT_TYPE_CLIENT);
1744 if (ai->ai_family == AF_INET)
1746 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1748 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1750 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1751 /* If possible, use the "ip_mreqn" structure which has
1752 * an "interface index" member. Using the interface
1753 * index is preferred here, because of its similarity
1754 * to the way IPv6 handles this. Unfortunately, it
1755 * appears not to be portable. */
1756 struct ip_mreqn mreq;
1758 memset (&mreq, 0, sizeof (mreq));
1759 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1760 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1761 mreq.imr_ifindex = se->interface;
1763 struct ip_mreq mreq;
1765 memset (&mreq, 0, sizeof (mreq));
1766 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1767 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1770 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1771 &mreq, sizeof (mreq)) != 0)
1774 ERROR ("network plugin: setsockopt (ipv4-multicast-if): %s",
1775 sstrerror (errno, errbuf, sizeof (errbuf)));
1782 else if (ai->ai_family == AF_INET6)
1784 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1786 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1788 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1790 sizeof (se->interface)) != 0)
1793 ERROR ("network plugin: setsockopt (ipv6-multicast-if): %s",
1794 sstrerror (errno, errbuf,
1803 /* else: Not a multicast interface. */
1804 if (se->interface != 0)
1806 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1807 char interface_name[IFNAMSIZ];
1809 if (if_indextoname (se->interface, interface_name) == NULL)
1812 DEBUG ("network plugin: Binding socket to interface %s", interface_name);
1814 if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
1816 sizeof(interface_name)) == -1 )
1819 ERROR ("network plugin: setsockopt (bind-if): %s",
1820 sstrerror (errno, errbuf, sizeof (errbuf)));
1823 /* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1826 WARNING ("network plugin: Cannot set the interface on a unicast "
1828 # if !defined(SO_BINDTODEVICE)
1829 "the \"SO_BINDTODEVICE\" socket option "
1831 "the \"if_indextoname\" function "
1833 "is not available on your system.");
1839 } /* }}} network_set_interface */
1841 static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
1850 /* allow multiple sockets to use the same PORT number */
1851 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1852 &yes, sizeof(yes)) == -1) {
1854 ERROR ("network plugin: setsockopt (reuseaddr): %s",
1855 sstrerror (errno, errbuf, sizeof (errbuf)));
1859 DEBUG ("fd = %i; calling `bind'", fd);
1861 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1865 sstrerror (errno, errbuf, sizeof (errbuf)));
1869 if (ai->ai_family == AF_INET)
1871 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1872 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1874 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1875 struct ip_mreqn mreq;
1877 struct ip_mreq mreq;
1880 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1882 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1883 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1884 /* Set the interface using the interface index if
1885 * possible (available). Unfortunately, the struct
1886 * ip_mreqn is not portable. */
1887 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1888 mreq.imr_ifindex = interface_idx;
1890 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1893 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1894 &loop, sizeof (loop)) == -1)
1897 ERROR ("network plugin: setsockopt (multicast-loop): %s",
1898 sstrerror (errno, errbuf,
1903 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1904 &mreq, sizeof (mreq)) == -1)
1907 ERROR ("network plugin: setsockopt (add-membership): %s",
1908 sstrerror (errno, errbuf,
1916 else if (ai->ai_family == AF_INET6)
1918 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1919 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1920 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1922 struct ipv6_mreq mreq;
1924 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1926 memcpy (&mreq.ipv6mr_multiaddr,
1928 sizeof (addr->sin6_addr));
1930 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1931 * ipv6mr_interface may be set to zeroes to
1932 * choose the default multicast interface or to
1933 * the index of a particular multicast-capable
1934 * interface if the host is multihomed.
1935 * Membership is associ-associated with a
1936 * single interface; programs running on
1937 * multihomed hosts may need to join the same
1938 * group on more than one interface.*/
1939 mreq.ipv6mr_interface = interface_idx;
1941 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1942 &loop, sizeof (loop)) == -1)
1945 ERROR ("network plugin: setsockopt (ipv6-multicast-loop): %s",
1946 sstrerror (errno, errbuf,
1951 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1952 &mreq, sizeof (mreq)) == -1)
1955 ERROR ("network plugin: setsockopt (ipv6-add-membership): %s",
1956 sstrerror (errno, errbuf,
1965 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1966 /* if a specific interface was set, bind the socket to it. But to avoid
1967 * possible problems with multicast routing, only do that for non-multicast
1969 if (interface_idx != 0)
1971 char interface_name[IFNAMSIZ];
1973 if (if_indextoname (interface_idx, interface_name) == NULL)
1976 DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
1978 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
1980 sizeof(interface_name)) == -1 )
1983 ERROR ("network plugin: setsockopt (bind-if): %s",
1984 sstrerror (errno, errbuf, sizeof (errbuf)));
1988 #endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1991 } /* int network_bind_socket */
1993 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
1994 * or `SOCKENT_TYPE_SERVER' */
1995 static int sockent_init (sockent_t *se, int type) /* {{{ */
2000 memset (se, 0, sizeof (*se));
2002 se->type = SOCKENT_TYPE_CLIENT;
2008 if (type == SOCKENT_TYPE_SERVER)
2010 se->type = SOCKENT_TYPE_SERVER;
2011 se->data.server.fd = NULL;
2013 se->data.server.security_level = SECURITY_LEVEL_NONE;
2014 se->data.server.auth_file = NULL;
2015 se->data.server.userdb = NULL;
2016 se->data.server.cypher = NULL;
2021 se->data.client.fd = -1;
2022 se->data.client.addr = NULL;
2024 se->data.client.security_level = SECURITY_LEVEL_NONE;
2025 se->data.client.username = NULL;
2026 se->data.client.password = NULL;
2027 se->data.client.cypher = NULL;
2032 } /* }}} int sockent_init */
2034 /* Open the file descriptors for a initialized sockent structure. */
2035 static int sockent_open (sockent_t *se) /* {{{ */
2037 struct addrinfo ai_hints;
2038 struct addrinfo *ai_list, *ai_ptr;
2042 const char *service;
2047 /* Set up the security structures. */
2048 #if HAVE_LIBGCRYPT /* {{{ */
2049 if (se->type == SOCKENT_TYPE_CLIENT)
2051 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
2053 network_init_gcrypt ();
2055 if ((se->data.client.username == NULL)
2056 || (se->data.client.password == NULL))
2058 ERROR ("network plugin: Client socket with "
2059 "security requested, but no "
2060 "credentials are configured.");
2063 gcry_md_hash_buffer (GCRY_MD_SHA256,
2064 se->data.client.password_hash,
2065 se->data.client.password,
2066 strlen (se->data.client.password));
2069 else /* (se->type == SOCKENT_TYPE_SERVER) */
2071 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2073 network_init_gcrypt ();
2075 if (se->data.server.auth_file == NULL)
2077 ERROR ("network plugin: Server socket with "
2078 "security requested, but no "
2079 "password file is configured.");
2083 if (se->data.server.auth_file != NULL)
2085 se->data.server.userdb = fbh_create (se->data.server.auth_file);
2086 if (se->data.server.userdb == NULL)
2088 ERROR ("network plugin: Reading password file "
2090 se->data.server.auth_file);
2091 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2096 #endif /* }}} HAVE_LIBGCRYPT */
2099 service = se->service;
2101 if (service == NULL)
2102 service = NET_DEFAULT_PORT;
2104 DEBUG ("network plugin: sockent_open: node = %s; service = %s;",
2107 memset (&ai_hints, 0, sizeof (ai_hints));
2108 ai_hints.ai_flags = 0;
2110 ai_hints.ai_flags |= AI_PASSIVE;
2112 #ifdef AI_ADDRCONFIG
2113 ai_hints.ai_flags |= AI_ADDRCONFIG;
2115 ai_hints.ai_family = AF_UNSPEC;
2116 ai_hints.ai_socktype = SOCK_DGRAM;
2117 ai_hints.ai_protocol = IPPROTO_UDP;
2119 ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
2122 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
2123 (se->node == NULL) ? "(null)" : se->node,
2124 (se->service == NULL) ? "(null)" : se->service,
2125 gai_strerror (ai_return));
2129 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2133 if (se->type == SOCKENT_TYPE_SERVER) /* {{{ */
2137 tmp = realloc (se->data.server.fd,
2138 sizeof (*tmp) * (se->data.server.fd_num + 1));
2141 ERROR ("network plugin: realloc failed.");
2144 se->data.server.fd = tmp;
2145 tmp = se->data.server.fd + se->data.server.fd_num;
2147 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
2148 ai_ptr->ai_protocol);
2152 ERROR ("network plugin: socket(2) failed: %s",
2153 sstrerror (errno, errbuf,
2158 status = network_bind_socket (*tmp, ai_ptr, se->interface);
2166 se->data.server.fd_num++;
2168 } /* }}} if (se->type == SOCKENT_TYPE_SERVER) */
2169 else /* if (se->type == SOCKENT_TYPE_CLIENT) {{{ */
2171 se->data.client.fd = socket (ai_ptr->ai_family,
2172 ai_ptr->ai_socktype,
2173 ai_ptr->ai_protocol);
2174 if (se->data.client.fd < 0)
2177 ERROR ("network plugin: socket(2) failed: %s",
2178 sstrerror (errno, errbuf,
2183 se->data.client.addr = malloc (sizeof (*se->data.client.addr));
2184 if (se->data.client.addr == NULL)
2186 ERROR ("network plugin: malloc failed.");
2187 close (se->data.client.fd);
2188 se->data.client.fd = -1;
2192 memset (se->data.client.addr, 0, sizeof (*se->data.client.addr));
2193 assert (sizeof (*se->data.client.addr) >= ai_ptr->ai_addrlen);
2194 memcpy (se->data.client.addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2195 se->data.client.addrlen = ai_ptr->ai_addrlen;
2197 network_set_ttl (se, ai_ptr);
2198 network_set_interface (se, ai_ptr);
2200 /* We don't open more than one write-socket per
2201 * node/service pair.. */
2203 } /* }}} if (se->type == SOCKENT_TYPE_CLIENT) */
2204 } /* for (ai_list) */
2206 freeaddrinfo (ai_list);
2208 /* Check if all went well. */
2209 if (se->type == SOCKENT_TYPE_SERVER)
2211 if (se->data.server.fd_num <= 0)
2214 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2216 if (se->data.client.fd < 0)
2221 } /* }}} int sockent_open */
2223 /* Add a sockent to the global list of sockets */
2224 static int sockent_add (sockent_t *se) /* {{{ */
2226 sockent_t *last_ptr;
2231 if (se->type == SOCKENT_TYPE_SERVER)
2236 tmp = realloc (listen_sockets_pollfd,
2237 sizeof (*tmp) * (listen_sockets_num
2238 + se->data.server.fd_num));
2241 ERROR ("network plugin: realloc failed.");
2244 listen_sockets_pollfd = tmp;
2245 tmp = listen_sockets_pollfd + listen_sockets_num;
2247 for (i = 0; i < se->data.server.fd_num; i++)
2249 memset (tmp + i, 0, sizeof (*tmp));
2250 tmp[i].fd = se->data.server.fd[i];
2251 tmp[i].events = POLLIN | POLLPRI;
2255 listen_sockets_num += se->data.server.fd_num;
2257 if (listen_sockets == NULL)
2259 listen_sockets = se;
2262 last_ptr = listen_sockets;
2264 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2266 if (sending_sockets == NULL)
2268 sending_sockets = se;
2271 last_ptr = sending_sockets;
2274 while (last_ptr->next != NULL)
2275 last_ptr = last_ptr->next;
2276 last_ptr->next = se;
2279 } /* }}} int sockent_add */
2281 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
2285 receive_list_entry_t *ent;
2288 /* Lock and wait for more data to come in */
2289 pthread_mutex_lock (&receive_list_lock);
2290 while ((listen_loop == 0)
2291 && (receive_list_head == NULL))
2292 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
2294 /* Remove the head entry and unlock */
2295 ent = receive_list_head;
2297 receive_list_head = ent->next;
2298 receive_list_length--;
2299 pthread_mutex_unlock (&receive_list_lock);
2301 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2302 * because we dispatch all missing packets before shutting down. */
2306 /* Look for the correct `sockent_t' */
2307 se = listen_sockets;
2312 for (i = 0; i < se->data.server.fd_num; i++)
2313 if (se->data.server.fd[i] == ent->fd)
2316 if (i < se->data.server.fd_num)
2324 ERROR ("network plugin: Got packet from FD %i, but can't "
2325 "find an appropriate socket entry.",
2332 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0,
2333 /* username = */ NULL);
2339 } /* }}} void *dispatch_thread */
2341 static int network_receive (void) /* {{{ */
2343 char buffer[network_config_packet_size];
2349 receive_list_entry_t *private_list_head;
2350 receive_list_entry_t *private_list_tail;
2351 uint64_t private_list_length;
2353 assert (listen_sockets_num > 0);
2355 private_list_head = NULL;
2356 private_list_tail = NULL;
2357 private_list_length = 0;
2359 while (listen_loop == 0)
2361 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2368 ERROR ("poll failed: %s",
2369 sstrerror (errno, errbuf, sizeof (errbuf)));
2373 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2375 receive_list_entry_t *ent;
2377 if ((listen_sockets_pollfd[i].revents
2378 & (POLLIN | POLLPRI)) == 0)
2382 buffer_len = recv (listen_sockets_pollfd[i].fd,
2383 buffer, sizeof (buffer),
2388 ERROR ("recv failed: %s",
2389 sstrerror (errno, errbuf,
2394 stats_octets_rx += ((uint64_t) buffer_len);
2397 /* TODO: Possible performance enhancement: Do not free
2398 * these entries in the dispatch thread but put them in
2399 * another list, so we don't have to allocate more and
2400 * more of these structures. */
2401 ent = malloc (sizeof (receive_list_entry_t));
2404 ERROR ("network plugin: malloc failed.");
2407 memset (ent, 0, sizeof (receive_list_entry_t));
2408 ent->data = malloc (network_config_packet_size);
2409 if (ent->data == NULL)
2412 ERROR ("network plugin: malloc failed.");
2415 ent->fd = listen_sockets_pollfd[i].fd;
2418 memcpy (ent->data, buffer, buffer_len);
2419 ent->data_len = buffer_len;
2421 if (private_list_head == NULL)
2422 private_list_head = ent;
2424 private_list_tail->next = ent;
2425 private_list_tail = ent;
2426 private_list_length++;
2428 /* Do not block here. Blocking here has led to
2429 * insufficient performance in the past. */
2430 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2432 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2433 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2435 if (receive_list_head == NULL)
2436 receive_list_head = private_list_head;
2438 receive_list_tail->next = private_list_head;
2439 receive_list_tail = private_list_tail;
2440 receive_list_length += private_list_length;
2442 pthread_cond_signal (&receive_list_cond);
2443 pthread_mutex_unlock (&receive_list_lock);
2445 private_list_head = NULL;
2446 private_list_tail = NULL;
2447 private_list_length = 0;
2449 } /* for (listen_sockets_pollfd) */
2450 } /* while (listen_loop == 0) */
2452 /* Make sure everything is dispatched before exiting. */
2453 if (private_list_head != NULL)
2455 pthread_mutex_lock (&receive_list_lock);
2457 if (receive_list_head == NULL)
2458 receive_list_head = private_list_head;
2460 receive_list_tail->next = private_list_head;
2461 receive_list_tail = private_list_tail;
2462 receive_list_length += private_list_length;
2464 private_list_head = NULL;
2465 private_list_tail = NULL;
2466 private_list_length = 0;
2468 pthread_cond_signal (&receive_list_cond);
2469 pthread_mutex_unlock (&receive_list_lock);
2473 } /* }}} int network_receive */
2475 static void *receive_thread (void __attribute__((unused)) *arg)
2477 return (network_receive () ? (void *) 1 : (void *) 0);
2478 } /* void *receive_thread */
2480 static void network_init_buffer (void)
2482 memset (send_buffer, 0, network_config_packet_size);
2483 send_buffer_ptr = send_buffer;
2484 send_buffer_fill = 0;
2486 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2487 } /* int network_init_buffer */
2489 static void networt_send_buffer_plain (const sockent_t *se, /* {{{ */
2490 const char *buffer, size_t buffer_size)
2496 status = sendto (se->data.client.fd, buffer, buffer_size,
2498 (struct sockaddr *) se->data.client.addr,
2499 se->data.client.addrlen);
2505 ERROR ("network plugin: sendto failed: %s",
2506 sstrerror (errno, errbuf,
2513 } /* }}} void networt_send_buffer_plain */
2516 #define BUFFER_ADD(p,s) do { \
2517 memcpy (buffer + buffer_offset, (p), (s)); \
2518 buffer_offset += (s); \
2521 static void networt_send_buffer_signed (const sockent_t *se, /* {{{ */
2522 const char *in_buffer, size_t in_buffer_size)
2524 part_signature_sha256_t ps;
2525 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2526 size_t buffer_offset;
2527 size_t username_len;
2531 unsigned char *hash;
2534 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2537 ERROR ("network plugin: Creating HMAC object failed: %s",
2538 gcry_strerror (err));
2542 err = gcry_md_setkey (hd, se->data.client.password,
2543 strlen (se->data.client.password));
2546 ERROR ("network plugin: gcry_md_setkey failed: %s",
2547 gcry_strerror (err));
2552 username_len = strlen (se->data.client.username);
2553 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2555 ERROR ("network plugin: Username too long: %s",
2556 se->data.client.username);
2560 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2561 se->data.client.username, username_len);
2562 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2563 in_buffer, in_buffer_size);
2565 /* Initialize the `ps' structure. */
2566 memset (&ps, 0, sizeof (ps));
2567 ps.head.type = htons (TYPE_SIGN_SHA256);
2568 ps.head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len);
2570 /* Calculate the hash value. */
2571 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2572 username_len + in_buffer_size);
2573 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2576 ERROR ("network plugin: gcry_md_read failed.");
2580 memcpy (ps.hash, hash, sizeof (ps.hash));
2582 /* Add the header */
2585 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2586 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2587 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2589 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2594 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2595 networt_send_buffer_plain (se, buffer, buffer_offset);
2596 } /* }}} void networt_send_buffer_signed */
2598 static void networt_send_buffer_encrypted (sockent_t *se, /* {{{ */
2599 const char *in_buffer, size_t in_buffer_size)
2601 part_encryption_aes256_t pea;
2602 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2604 size_t buffer_offset;
2606 size_t username_len;
2608 gcry_cipher_hd_t cypher;
2610 /* Initialize the header fields */
2611 memset (&pea, 0, sizeof (pea));
2612 pea.head.type = htons (TYPE_ENCR_AES256);
2614 pea.username = se->data.client.username;
2616 username_len = strlen (pea.username);
2617 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2619 ERROR ("network plugin: Username too long: %s", pea.username);
2623 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2624 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2625 - sizeof (pea.hash);
2627 assert (buffer_size <= sizeof (buffer));
2628 DEBUG ("network plugin: networt_send_buffer_encrypted: "
2629 "buffer_size = %zu;", buffer_size);
2631 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2632 + username_len + in_buffer_size));
2633 pea.username_length = htons ((uint16_t) username_len);
2635 /* Chose a random initialization vector. */
2636 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2638 /* Create hash of the payload */
2639 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2641 /* Initialize the buffer */
2643 memset (buffer, 0, sizeof (buffer));
2646 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2647 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2648 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2649 BUFFER_ADD (pea.username, username_len);
2650 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2651 assert (buffer_offset == header_size);
2652 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2653 BUFFER_ADD (in_buffer, in_buffer_size);
2655 assert (buffer_offset == buffer_size);
2657 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2658 se->data.client.password);
2662 /* Encrypt the buffer in-place */
2663 err = gcry_cipher_encrypt (cypher,
2664 buffer + header_size,
2665 buffer_size - header_size,
2666 /* in = */ NULL, /* in len = */ 0);
2669 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2670 gcry_strerror (err));
2674 /* Send it out without further modifications */
2675 networt_send_buffer_plain (se, buffer, buffer_size);
2676 } /* }}} void networt_send_buffer_encrypted */
2678 #endif /* HAVE_LIBGCRYPT */
2680 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2684 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2686 for (se = sending_sockets; se != NULL; se = se->next)
2689 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2690 networt_send_buffer_encrypted (se, buffer, buffer_len);
2691 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2692 networt_send_buffer_signed (se, buffer, buffer_len);
2693 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2694 #endif /* HAVE_LIBGCRYPT */
2695 networt_send_buffer_plain (se, buffer, buffer_len);
2696 } /* for (sending_sockets) */
2697 } /* }}} void network_send_buffer */
2699 static int add_to_buffer (char *buffer, int buffer_size, /* {{{ */
2700 value_list_t *vl_def,
2701 const data_set_t *ds, const value_list_t *vl)
2703 char *buffer_orig = buffer;
2705 if (strcmp (vl_def->host, vl->host) != 0)
2707 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2708 vl->host, strlen (vl->host)) != 0)
2710 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2713 if (vl_def->time != vl->time)
2715 if (write_part_number (&buffer, &buffer_size, TYPE_TIME_HR,
2716 (uint64_t) vl->time))
2718 vl_def->time = vl->time;
2721 if (vl_def->interval != vl->interval)
2723 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL_HR,
2724 (uint64_t) vl->interval))
2726 vl_def->interval = vl->interval;
2729 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2731 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2732 vl->plugin, strlen (vl->plugin)) != 0)
2734 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2737 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2739 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2740 vl->plugin_instance,
2741 strlen (vl->plugin_instance)) != 0)
2743 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2746 if (strcmp (vl_def->type, vl->type) != 0)
2748 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2749 vl->type, strlen (vl->type)) != 0)
2751 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2754 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2756 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2758 strlen (vl->type_instance)) != 0)
2760 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2763 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2766 return (buffer - buffer_orig);
2767 } /* }}} int add_to_buffer */
2769 static void flush_buffer (void)
2771 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2774 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2776 stats_octets_tx += ((uint64_t) send_buffer_fill);
2779 network_init_buffer ();
2782 static int network_write (const data_set_t *ds, const value_list_t *vl,
2783 user_data_t __attribute__((unused)) *user_data)
2787 if (!check_send_okay (vl))
2790 char name[6*DATA_MAX_NAME_LEN];
2791 FORMAT_VL (name, sizeof (name), vl);
2792 name[sizeof (name) - 1] = 0;
2793 DEBUG ("network plugin: network_write: "
2794 "NOT sending %s.", name);
2796 /* Counter is not protected by another lock and may be reached by
2797 * multiple threads */
2798 pthread_mutex_lock (&stats_lock);
2799 stats_values_not_sent++;
2800 pthread_mutex_unlock (&stats_lock);
2804 uc_meta_data_add_unsigned_int (vl,
2805 "network:time_sent", (uint64_t) vl->time);
2807 pthread_mutex_lock (&send_buffer_lock);
2809 status = add_to_buffer (send_buffer_ptr,
2810 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2815 /* status == bytes added to the buffer */
2816 send_buffer_fill += status;
2817 send_buffer_ptr += status;
2819 stats_values_sent++;
2825 status = add_to_buffer (send_buffer_ptr,
2826 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2832 send_buffer_fill += status;
2833 send_buffer_ptr += status;
2835 stats_values_sent++;
2841 ERROR ("network plugin: Unable to append to the "
2842 "buffer for some weird reason");
2844 else if ((network_config_packet_size - send_buffer_fill) < 15)
2849 pthread_mutex_unlock (&send_buffer_lock);
2851 return ((status < 0) ? -1 : 0);
2852 } /* int network_write */
2854 static int network_config_set_boolean (const oconfig_item_t *ci, /* {{{ */
2857 if ((ci->values_num != 1)
2858 || ((ci->values[0].type != OCONFIG_TYPE_BOOLEAN)
2859 && (ci->values[0].type != OCONFIG_TYPE_STRING)))
2861 ERROR ("network plugin: The `%s' config option needs "
2862 "exactly one boolean argument.", ci->key);
2866 if (ci->values[0].type == OCONFIG_TYPE_BOOLEAN)
2868 if (ci->values[0].value.boolean)
2875 char *str = ci->values[0].value.string;
2879 else if (IS_FALSE (str))
2883 ERROR ("network plugin: Cannot parse string value `%s' of the `%s' "
2884 "option as boolean value.",
2891 } /* }}} int network_config_set_boolean */
2893 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2896 if ((ci->values_num != 1)
2897 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2899 WARNING ("network plugin: The `TimeToLive' config option needs exactly "
2900 "one numeric argument.");
2904 tmp = (int) ci->values[0].value.number;
2905 if ((tmp > 0) && (tmp <= 255))
2906 network_config_ttl = tmp;
2909 } /* }}} int network_config_set_ttl */
2911 static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
2914 if ((ci->values_num != 1)
2915 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2917 WARNING ("network plugin: The `Interface' config option needs exactly "
2918 "one string argument.");
2922 if (interface == NULL)
2925 *interface = if_nametoindex (ci->values[0].value.string);
2928 } /* }}} int network_config_set_interface */
2930 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
2933 if ((ci->values_num != 1)
2934 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2936 WARNING ("network plugin: The `MaxPacketSize' config option needs exactly "
2937 "one numeric argument.");
2941 tmp = (int) ci->values[0].value.number;
2942 if ((tmp >= 1024) && (tmp <= 65535))
2943 network_config_packet_size = tmp;
2946 } /* }}} int network_config_set_buffer_size */
2949 static int network_config_set_string (const oconfig_item_t *ci, /* {{{ */
2953 if ((ci->values_num != 1)
2954 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2956 WARNING ("network plugin: The `%s' config option needs exactly "
2957 "one string argument.", ci->key);
2961 tmp = strdup (ci->values[0].value.string);
2965 sfree (*ret_string);
2969 } /* }}} int network_config_set_string */
2970 #endif /* HAVE_LIBGCRYPT */
2973 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
2977 if ((ci->values_num != 1)
2978 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2980 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
2981 "one string argument.");
2985 str = ci->values[0].value.string;
2986 if (strcasecmp ("Encrypt", str) == 0)
2987 *retval = SECURITY_LEVEL_ENCRYPT;
2988 else if (strcasecmp ("Sign", str) == 0)
2989 *retval = SECURITY_LEVEL_SIGN;
2990 else if (strcasecmp ("None", str) == 0)
2991 *retval = SECURITY_LEVEL_NONE;
2994 WARNING ("network plugin: Unknown security level: %s.", str);
2999 } /* }}} int network_config_set_security_level */
3000 #endif /* HAVE_LIBGCRYPT */
3002 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
3008 if ((ci->values_num < 1) || (ci->values_num > 2)
3009 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3010 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3012 ERROR ("network plugin: The `%s' config option needs "
3013 "one or two string arguments.", ci->key);
3017 se = malloc (sizeof (*se));
3020 ERROR ("network plugin: malloc failed.");
3023 sockent_init (se, SOCKENT_TYPE_SERVER);
3025 se->node = strdup (ci->values[0].value.string);
3026 if (ci->values_num >= 2)
3027 se->service = strdup (ci->values[1].value.string);
3029 for (i = 0; i < ci->children_num; i++)
3031 oconfig_item_t *child = ci->children + i;
3034 if (strcasecmp ("AuthFile", child->key) == 0)
3035 network_config_set_string (child, &se->data.server.auth_file);
3036 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3037 network_config_set_security_level (child,
3038 &se->data.server.security_level);
3040 #endif /* HAVE_LIBGCRYPT */
3041 if (strcasecmp ("Interface", child->key) == 0)
3042 network_config_set_interface (child,
3046 WARNING ("network plugin: Option `%s' is not allowed here.",
3052 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
3053 && (se->data.server.auth_file == NULL))
3055 ERROR ("network plugin: A security level higher than `none' was "
3056 "requested, but no AuthFile option was given. Cowardly refusing to "
3057 "open this socket!");
3058 sockent_destroy (se);
3061 #endif /* HAVE_LIBGCRYPT */
3063 status = sockent_open (se);
3066 ERROR ("network plugin: network_config_add_listen: sockent_open failed.");
3067 sockent_destroy (se);
3071 status = sockent_add (se);
3074 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
3075 sockent_destroy (se);
3080 } /* }}} int network_config_add_listen */
3082 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
3088 if ((ci->values_num < 1) || (ci->values_num > 2)
3089 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3090 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3092 ERROR ("network plugin: The `%s' config option needs "
3093 "one or two string arguments.", ci->key);
3097 se = malloc (sizeof (*se));
3100 ERROR ("network plugin: malloc failed.");
3103 sockent_init (se, SOCKENT_TYPE_CLIENT);
3105 se->node = strdup (ci->values[0].value.string);
3106 if (ci->values_num >= 2)
3107 se->service = strdup (ci->values[1].value.string);
3109 for (i = 0; i < ci->children_num; i++)
3111 oconfig_item_t *child = ci->children + i;
3114 if (strcasecmp ("Username", child->key) == 0)
3115 network_config_set_string (child, &se->data.client.username);
3116 else if (strcasecmp ("Password", child->key) == 0)
3117 network_config_set_string (child, &se->data.client.password);
3118 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3119 network_config_set_security_level (child,
3120 &se->data.client.security_level);
3122 #endif /* HAVE_LIBGCRYPT */
3123 if (strcasecmp ("Interface", child->key) == 0)
3124 network_config_set_interface (child,
3128 WARNING ("network plugin: Option `%s' is not allowed here.",
3134 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
3135 && ((se->data.client.username == NULL)
3136 || (se->data.client.password == NULL)))
3138 ERROR ("network plugin: A security level higher than `none' was "
3139 "requested, but no Username or Password option was given. "
3140 "Cowardly refusing to open this socket!");
3141 sockent_destroy (se);
3144 #endif /* HAVE_LIBGCRYPT */
3146 status = sockent_open (se);
3149 ERROR ("network plugin: network_config_add_server: sockent_open failed.");
3150 sockent_destroy (se);
3154 status = sockent_add (se);
3157 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
3158 sockent_destroy (se);
3163 } /* }}} int network_config_add_server */
3165 static int network_config (oconfig_item_t *ci) /* {{{ */
3169 for (i = 0; i < ci->children_num; i++)
3171 oconfig_item_t *child = ci->children + i;
3173 if (strcasecmp ("Listen", child->key) == 0)
3174 network_config_add_listen (child);
3175 else if (strcasecmp ("Server", child->key) == 0)
3176 network_config_add_server (child);
3177 else if (strcasecmp ("TimeToLive", child->key) == 0)
3178 network_config_set_ttl (child);
3179 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
3180 network_config_set_buffer_size (child);
3181 else if (strcasecmp ("Forward", child->key) == 0)
3182 network_config_set_boolean (child, &network_config_forward);
3183 else if (strcasecmp ("ReportStats", child->key) == 0)
3184 network_config_set_boolean (child, &network_config_stats);
3187 WARNING ("network plugin: Option `%s' is not allowed here.",
3193 } /* }}} int network_config */
3195 static int network_notification (const notification_t *n,
3196 user_data_t __attribute__((unused)) *user_data)
3198 char buffer[network_config_packet_size];
3199 char *buffer_ptr = buffer;
3200 int buffer_free = sizeof (buffer);
3203 if (!check_send_notify_okay (n))
3206 memset (buffer, 0, sizeof (buffer));
3208 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME_HR,
3209 (uint64_t) n->time);
3213 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
3214 (uint64_t) n->severity);
3218 if (strlen (n->host) > 0)
3220 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
3221 n->host, strlen (n->host));
3226 if (strlen (n->plugin) > 0)
3228 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
3229 n->plugin, strlen (n->plugin));
3234 if (strlen (n->plugin_instance) > 0)
3236 status = write_part_string (&buffer_ptr, &buffer_free,
3237 TYPE_PLUGIN_INSTANCE,
3238 n->plugin_instance, strlen (n->plugin_instance));
3243 if (strlen (n->type) > 0)
3245 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3246 n->type, strlen (n->type));
3251 if (strlen (n->type_instance) > 0)
3253 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3254 n->type_instance, strlen (n->type_instance));
3259 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3260 n->message, strlen (n->message));
3264 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3267 } /* int network_notification */
3269 static int network_shutdown (void)
3273 /* Kill the listening thread */
3274 if (receive_thread_running != 0)
3276 INFO ("network plugin: Stopping receive thread.");
3277 pthread_kill (receive_thread_id, SIGTERM);
3278 pthread_join (receive_thread_id, NULL /* no return value */);
3279 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3280 receive_thread_running = 0;
3283 /* Shutdown the dispatching thread */
3284 if (dispatch_thread_running != 0)
3286 INFO ("network plugin: Stopping dispatch thread.");
3287 pthread_mutex_lock (&receive_list_lock);
3288 pthread_cond_broadcast (&receive_list_cond);
3289 pthread_mutex_unlock (&receive_list_lock);
3290 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3291 dispatch_thread_running = 0;
3294 sockent_destroy (listen_sockets);
3296 if (send_buffer_fill > 0)
3299 sfree (send_buffer);
3301 /* TODO: Close `sending_sockets' */
3303 plugin_unregister_config ("network");
3304 plugin_unregister_init ("network");
3305 plugin_unregister_write ("network");
3306 plugin_unregister_shutdown ("network");
3309 } /* int network_shutdown */
3311 static int network_stats_read (void) /* {{{ */
3313 derive_t copy_octets_rx;
3314 derive_t copy_octets_tx;
3315 derive_t copy_packets_rx;
3316 derive_t copy_packets_tx;
3317 derive_t copy_values_dispatched;
3318 derive_t copy_values_not_dispatched;
3319 derive_t copy_values_sent;
3320 derive_t copy_values_not_sent;
3321 derive_t copy_receive_list_length;
3322 value_list_t vl = VALUE_LIST_INIT;
3325 copy_octets_rx = stats_octets_rx;
3326 copy_octets_tx = stats_octets_tx;
3327 copy_packets_rx = stats_packets_rx;
3328 copy_packets_tx = stats_packets_tx;
3329 copy_values_dispatched = stats_values_dispatched;
3330 copy_values_not_dispatched = stats_values_not_dispatched;
3331 copy_values_sent = stats_values_sent;
3332 copy_values_not_sent = stats_values_not_sent;
3333 copy_receive_list_length = receive_list_length;
3335 /* Initialize `vl' */
3339 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3340 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3342 /* Octets received / sent */
3343 vl.values[0].derive = (derive_t) copy_octets_rx;
3344 vl.values[1].derive = (derive_t) copy_octets_tx;
3345 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3346 plugin_dispatch_values (&vl);
3348 /* Packets received / send */
3349 vl.values[0].derive = (derive_t) copy_packets_rx;
3350 vl.values[1].derive = (derive_t) copy_packets_tx;
3351 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3352 plugin_dispatch_values (&vl);
3354 /* Values (not) dispatched and (not) send */
3355 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3358 vl.values[0].derive = (derive_t) copy_values_dispatched;
3359 sstrncpy (vl.type_instance, "dispatch-accepted",
3360 sizeof (vl.type_instance));
3361 plugin_dispatch_values (&vl);
3363 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3364 sstrncpy (vl.type_instance, "dispatch-rejected",
3365 sizeof (vl.type_instance));
3366 plugin_dispatch_values (&vl);
3368 vl.values[0].derive = (derive_t) copy_values_sent;
3369 sstrncpy (vl.type_instance, "send-accepted",
3370 sizeof (vl.type_instance));
3371 plugin_dispatch_values (&vl);
3373 vl.values[0].derive = (derive_t) copy_values_not_sent;
3374 sstrncpy (vl.type_instance, "send-rejected",
3375 sizeof (vl.type_instance));
3376 plugin_dispatch_values (&vl);
3378 /* Receive queue length */
3379 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3380 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3381 vl.type_instance[0] = 0;
3382 plugin_dispatch_values (&vl);
3385 } /* }}} int network_stats_read */
3387 static int network_init (void)
3389 static _Bool have_init = 0;
3391 /* Check if we were already initialized. If so, just return - there's
3392 * nothing more to do (for now, that is). */
3398 network_init_gcrypt ();
3401 if (network_config_stats != 0)
3402 plugin_register_read ("network", network_stats_read);
3404 plugin_register_shutdown ("network", network_shutdown);
3406 send_buffer = malloc (network_config_packet_size);
3407 if (send_buffer == NULL)
3409 ERROR ("network plugin: malloc failed.");
3412 network_init_buffer ();
3414 /* setup socket(s) and so on */
3415 if (sending_sockets != NULL)
3417 plugin_register_write ("network", network_write,
3418 /* user_data = */ NULL);
3419 plugin_register_notification ("network", network_notification,
3420 /* user_data = */ NULL);
3423 /* If no threads need to be started, return here. */
3424 if ((listen_sockets_num == 0)
3425 || ((dispatch_thread_running != 0)
3426 && (receive_thread_running != 0)))
3429 if (dispatch_thread_running == 0)
3432 status = plugin_thread_create (&dispatch_thread_id,
3433 NULL /* no attributes */,
3435 NULL /* no argument */);
3439 ERROR ("network: pthread_create failed: %s",
3440 sstrerror (errno, errbuf,
3445 dispatch_thread_running = 1;
3449 if (receive_thread_running == 0)
3452 status = plugin_thread_create (&receive_thread_id,
3453 NULL /* no attributes */,
3455 NULL /* no argument */);
3459 ERROR ("network: pthread_create failed: %s",
3460 sstrerror (errno, errbuf,
3465 receive_thread_running = 1;
3470 } /* int network_init */
3473 * The flush option of the network plugin cannot flush individual identifiers.
3474 * All the values are added to a buffer and sent when the buffer is full, the
3475 * requested value may or may not be in there, it's not worth finding out. We
3476 * just send the buffer if `flush' is called - if the requested value was in
3477 * there, good. If not, well, then there is nothing to flush.. -octo
3479 static int network_flush (__attribute__((unused)) cdtime_t timeout,
3480 __attribute__((unused)) const char *identifier,
3481 __attribute__((unused)) user_data_t *user_data)
3483 pthread_mutex_lock (&send_buffer_lock);
3485 if (send_buffer_fill > 0)
3488 pthread_mutex_unlock (&send_buffer_lock);
3491 } /* int network_flush */
3493 void module_register (void)
3495 plugin_register_complex_config ("network", network_config);
3496 plugin_register_init ("network", network_init);
3497 plugin_register_flush ("network", network_flush,
3498 /* user_data = */ NULL);
3499 } /* void module_register */
3501 /* vim: set fdm=marker : */