1 /**
2 * collectd - src/network.c
3 * Copyright (C) 2005-2009 Florian octo Forster
4 * Copyright (C) 2009 Aman Gupta
5 *
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
9 * applicable.
10 *
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.
15 *
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
19 *
20 * Authors:
21 * Florian octo Forster <octo at verplant.org>
22 * Aman Gupta <aman at tmm1.net>
23 **/
25 #define _BSD_SOURCE /* For struct ip_mreq */
27 #include "collectd.h"
28 #include "plugin.h"
29 #include "common.h"
30 #include "configfile.h"
31 #include "utils_fbhash.h"
32 #include "utils_avltree.h"
33 #include "utils_cache.h"
35 #include "network.h"
37 #if HAVE_PTHREAD_H
38 # include <pthread.h>
39 #endif
40 #if HAVE_SYS_SOCKET_H
41 # include <sys/socket.h>
42 #endif
43 #if HAVE_NETDB_H
44 # include <netdb.h>
45 #endif
46 #if HAVE_NETINET_IN_H
47 # include <netinet/in.h>
48 #endif
49 #if HAVE_ARPA_INET_H
50 # include <arpa/inet.h>
51 #endif
52 #if HAVE_POLL_H
53 # include <poll.h>
54 #endif
56 #if HAVE_LIBGCRYPT
57 # include <gcrypt.h>
58 GCRY_THREAD_OPTION_PTHREAD_IMPL;
59 #endif
61 #ifndef IPV6_ADD_MEMBERSHIP
62 # ifdef IPV6_JOIN_GROUP
63 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
64 # else
65 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
66 # endif
67 #endif /* !IP_ADD_MEMBERSHIP */
69 /*
70 * Maximum size required for encryption / signing:
71 *
72 * 42 bytes for the encryption header
73 * + 64 bytes for the username
74 * -----------
75 * = 106 bytes
76 */
77 #define BUFF_SIG_SIZE 106
79 /*
80 * Private data types
81 */
82 #define SECURITY_LEVEL_NONE 0
83 #if HAVE_LIBGCRYPT
84 # define SECURITY_LEVEL_SIGN 1
85 # define SECURITY_LEVEL_ENCRYPT 2
86 #endif
87 struct sockent_client
88 {
89 int fd;
90 struct sockaddr_storage *addr;
91 socklen_t addrlen;
92 #if HAVE_LIBGCRYPT
93 int security_level;
94 char *username;
95 char *password;
96 gcry_cipher_hd_t cypher;
97 unsigned char password_hash[32];
98 #endif
99 };
101 struct sockent_server
102 {
103 int *fd;
104 size_t fd_num;
105 #if HAVE_LIBGCRYPT
106 int security_level;
107 char *auth_file;
108 fbhash_t *userdb;
109 gcry_cipher_hd_t cypher;
110 #endif
111 };
113 typedef struct sockent
114 {
115 #define SOCKENT_TYPE_CLIENT 1
116 #define SOCKENT_TYPE_SERVER 2
117 int type;
119 char *node;
120 char *service;
122 union
123 {
124 struct sockent_client client;
125 struct sockent_server server;
126 } data;
128 struct sockent *next;
129 } sockent_t;
131 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
132 * 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
133 * +-------+-----------------------+-------------------------------+
134 * ! Ver. ! ! Length !
135 * +-------+-----------------------+-------------------------------+
136 */
137 struct part_header_s
138 {
139 uint16_t type;
140 uint16_t length;
141 };
142 typedef struct part_header_s part_header_t;
144 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
145 * 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
146 * +-------------------------------+-------------------------------+
147 * ! Type ! Length !
148 * +-------------------------------+-------------------------------+
149 * : (Length - 4) Bytes :
150 * +---------------------------------------------------------------+
151 */
152 struct part_string_s
153 {
154 part_header_t *head;
155 char *value;
156 };
157 typedef struct part_string_s part_string_t;
159 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
160 * 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
161 * +-------------------------------+-------------------------------+
162 * ! Type ! Length !
163 * +-------------------------------+-------------------------------+
164 * : (Length - 4 == 2 || 4 || 8) Bytes :
165 * +---------------------------------------------------------------+
166 */
167 struct part_number_s
168 {
169 part_header_t *head;
170 uint64_t *value;
171 };
172 typedef struct part_number_s part_number_t;
174 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
175 * 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
176 * +-------------------------------+-------------------------------+
177 * ! Type ! Length !
178 * +-------------------------------+---------------+---------------+
179 * ! Num of values ! Type0 ! Type1 !
180 * +-------------------------------+---------------+---------------+
181 * ! Value0 !
182 * ! !
183 * +---------------------------------------------------------------+
184 * ! Value1 !
185 * ! !
186 * +---------------------------------------------------------------+
187 */
188 struct part_values_s
189 {
190 part_header_t *head;
191 uint16_t *num_values;
192 uint8_t *values_types;
193 value_t *values;
194 };
195 typedef struct part_values_s part_values_t;
197 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
198 * 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
199 * +-------------------------------+-------------------------------+
200 * ! Type ! Length !
201 * +-------------------------------+-------------------------------+
202 * ! Hash (Bits 0 - 31) !
203 * : : :
204 * ! Hash (Bits 224 - 255) !
205 * +---------------------------------------------------------------+
206 */
207 /* Minimum size */
208 #define PART_SIGNATURE_SHA256_SIZE 36
209 struct part_signature_sha256_s
210 {
211 part_header_t head;
212 unsigned char hash[32];
213 char *username;
214 };
215 typedef struct part_signature_sha256_s part_signature_sha256_t;
217 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
218 * 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
219 * +-------------------------------+-------------------------------+
220 * ! Type ! Length !
221 * +-------------------------------+-------------------------------+
222 * ! Original length ! Padding (0 - 15 bytes) !
223 * +-------------------------------+-------------------------------+
224 * ! Hash (Bits 0 - 31) !
225 * : : :
226 * ! Hash (Bits 128 - 159) !
227 * +---------------------------------------------------------------+
228 */
229 /* Minimum size */
230 #define PART_ENCRYPTION_AES256_SIZE 42
231 struct part_encryption_aes256_s
232 {
233 part_header_t head;
234 uint16_t username_length;
235 char *username;
236 unsigned char iv[16];
237 /* <encrypted> */
238 unsigned char hash[20];
239 /* <payload /> */
240 /* </encrypted> */
241 };
242 typedef struct part_encryption_aes256_s part_encryption_aes256_t;
244 struct receive_list_entry_s
245 {
246 char *data;
247 int data_len;
248 int fd;
249 struct receive_list_entry_s *next;
250 };
251 typedef struct receive_list_entry_s receive_list_entry_t;
253 /*
254 * Private variables
255 */
256 static int network_config_ttl = 0;
257 static size_t network_config_packet_size = 1024;
258 static int network_config_forward = 0;
259 static int network_config_stats = 0;
261 static sockent_t *sending_sockets = NULL;
263 static receive_list_entry_t *receive_list_head = NULL;
264 static receive_list_entry_t *receive_list_tail = NULL;
265 static pthread_mutex_t receive_list_lock = PTHREAD_MUTEX_INITIALIZER;
266 static pthread_cond_t receive_list_cond = PTHREAD_COND_INITIALIZER;
267 static uint64_t receive_list_length = 0;
269 static sockent_t *listen_sockets = NULL;
270 static struct pollfd *listen_sockets_pollfd = NULL;
271 static size_t listen_sockets_num = 0;
273 /* The receive and dispatch threads will run as long as `listen_loop' is set to
274 * zero. */
275 static int listen_loop = 0;
276 static int receive_thread_running = 0;
277 static pthread_t receive_thread_id;
278 static int dispatch_thread_running = 0;
279 static pthread_t dispatch_thread_id;
281 /* Buffer in which to-be-sent network packets are constructed. */
282 static char *send_buffer;
283 static char *send_buffer_ptr;
284 static int send_buffer_fill;
285 static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
286 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
288 /* XXX: These counters are incremented from one place only. The spot in which
289 * the values are incremented is either only reachable by one thread (the
290 * dispatch thread, for example) or locked by some lock (send_buffer_lock for
291 * example). Only if neither is true, the stats_lock is acquired. The counters
292 * are always read without holding a lock in the hope that writing 8 bytes to
293 * memory is an atomic operation. */
294 static uint64_t stats_octets_rx = 0;
295 static uint64_t stats_octets_tx = 0;
296 static uint64_t stats_packets_rx = 0;
297 static uint64_t stats_packets_tx = 0;
298 static uint64_t stats_values_dispatched = 0;
299 static uint64_t stats_values_not_dispatched = 0;
300 static uint64_t stats_values_sent = 0;
301 static uint64_t stats_values_not_sent = 0;
302 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
304 /*
305 * Private functions
306 */
307 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
308 {
309 uint64_t time_sent = 0;
310 int status;
312 status = uc_meta_data_get_unsigned_int (vl,
313 "network:time_sent", &time_sent);
315 /* This is a value we already sent. Don't allow it to be received again in
316 * order to avoid looping. */
317 if ((status == 0) && (time_sent >= ((uint64_t) vl->time)))
318 return (false);
320 return (true);
321 } /* }}} _Bool check_receive_okay */
323 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
324 {
325 _Bool received = false;
326 int status;
328 if (network_config_forward != 0)
329 return (true);
331 if (vl->meta == NULL)
332 return (true);
334 status = meta_data_get_boolean (vl->meta, "network:received", &received);
335 if (status == -ENOENT)
336 return (true);
337 else if (status != 0)
338 {
339 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
340 "with status %i.", status);
341 return (true);
342 }
344 /* By default, only *send* value lists that were not *received* by the
345 * network plugin. */
346 return (!received);
347 } /* }}} _Bool check_send_okay */
349 static int network_dispatch_values (value_list_t *vl) /* {{{ */
350 {
351 int status;
353 if ((vl->time <= 0)
354 || (strlen (vl->host) <= 0)
355 || (strlen (vl->plugin) <= 0)
356 || (strlen (vl->type) <= 0))
357 return (-EINVAL);
359 if (!check_receive_okay (vl))
360 {
361 #if COLLECT_DEBUG
362 char name[6*DATA_MAX_NAME_LEN];
363 FORMAT_VL (name, sizeof (name), vl);
364 name[sizeof (name) - 1] = 0;
365 DEBUG ("network plugin: network_dispatch_values: "
366 "NOT dispatching %s.", name);
367 #endif
368 stats_values_not_dispatched++;
369 return (0);
370 }
372 assert (vl->meta == NULL);
374 vl->meta = meta_data_create ();
375 if (vl->meta == NULL)
376 {
377 ERROR ("network plugin: meta_data_create failed.");
378 return (-ENOMEM);
379 }
381 status = meta_data_add_boolean (vl->meta, "network:received", true);
382 if (status != 0)
383 {
384 ERROR ("network plugin: meta_data_add_boolean failed.");
385 meta_data_destroy (vl->meta);
386 vl->meta = NULL;
387 return (status);
388 }
390 plugin_dispatch_values (vl);
391 stats_values_dispatched++;
393 meta_data_destroy (vl->meta);
394 vl->meta = NULL;
396 return (0);
397 } /* }}} int network_dispatch_values */
399 #if HAVE_LIBGCRYPT
400 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
401 const void *iv, size_t iv_size, const char *username)
402 {
403 gcry_error_t err;
404 gcry_cipher_hd_t *cyper_ptr;
405 unsigned char password_hash[32];
407 if (se->type == SOCKENT_TYPE_CLIENT)
408 {
409 cyper_ptr = &se->data.client.cypher;
410 memcpy (password_hash, se->data.client.password_hash,
411 sizeof (password_hash));
412 }
413 else
414 {
415 char *secret;
417 cyper_ptr = &se->data.server.cypher;
419 if (username == NULL)
420 return (NULL);
422 secret = fbh_get (se->data.server.userdb, username);
423 if (secret == NULL)
424 return (NULL);
426 gcry_md_hash_buffer (GCRY_MD_SHA256,
427 password_hash,
428 secret, strlen (secret));
430 sfree (secret);
431 }
433 if (*cyper_ptr == NULL)
434 {
435 err = gcry_cipher_open (cyper_ptr,
436 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
437 if (err != 0)
438 {
439 ERROR ("network plugin: gcry_cipher_open returned: %s",
440 gcry_strerror (err));
441 *cyper_ptr = NULL;
442 return (NULL);
443 }
444 }
445 else
446 {
447 gcry_cipher_reset (*cyper_ptr);
448 }
449 assert (*cyper_ptr != NULL);
451 err = gcry_cipher_setkey (*cyper_ptr,
452 password_hash, sizeof (password_hash));
453 if (err != 0)
454 {
455 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
456 gcry_strerror (err));
457 gcry_cipher_close (*cyper_ptr);
458 *cyper_ptr = NULL;
459 return (NULL);
460 }
462 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
463 if (err != 0)
464 {
465 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
466 gcry_strerror (err));
467 gcry_cipher_close (*cyper_ptr);
468 *cyper_ptr = NULL;
469 return (NULL);
470 }
472 return (*cyper_ptr);
473 } /* }}} int network_get_aes256_cypher */
474 #endif /* HAVE_LIBGCRYPT */
476 static int write_part_values (char **ret_buffer, int *ret_buffer_len,
477 const data_set_t *ds, const value_list_t *vl)
478 {
479 char *packet_ptr;
480 int packet_len;
481 int num_values;
483 part_header_t pkg_ph;
484 uint16_t pkg_num_values;
485 uint8_t *pkg_values_types;
486 value_t *pkg_values;
488 int offset;
489 int i;
491 num_values = vl->values_len;
492 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
493 + (num_values * sizeof (uint8_t))
494 + (num_values * sizeof (value_t));
496 if (*ret_buffer_len < packet_len)
497 return (-1);
499 pkg_values_types = (uint8_t *) malloc (num_values * sizeof (uint8_t));
500 if (pkg_values_types == NULL)
501 {
502 ERROR ("network plugin: write_part_values: malloc failed.");
503 return (-1);
504 }
506 pkg_values = (value_t *) malloc (num_values * sizeof (value_t));
507 if (pkg_values == NULL)
508 {
509 free (pkg_values_types);
510 ERROR ("network plugin: write_part_values: malloc failed.");
511 return (-1);
512 }
514 pkg_ph.type = htons (TYPE_VALUES);
515 pkg_ph.length = htons (packet_len);
517 pkg_num_values = htons ((uint16_t) vl->values_len);
519 for (i = 0; i < num_values; i++)
520 {
521 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
522 switch (ds->ds[i].type)
523 {
524 case DS_TYPE_COUNTER:
525 pkg_values[i].counter = htonll (vl->values[i].counter);
526 break;
528 case DS_TYPE_GAUGE:
529 pkg_values[i].gauge = htond (vl->values[i].gauge);
530 break;
532 case DS_TYPE_DERIVE:
533 pkg_values[i].derive = htonll (vl->values[i].derive);
534 break;
536 case DS_TYPE_ABSOLUTE:
537 pkg_values[i].absolute = htonll (vl->values[i].absolute);
538 break;
540 default:
541 free (pkg_values_types);
542 free (pkg_values);
543 ERROR ("network plugin: write_part_values: "
544 "Unknown data source type: %i",
545 ds->ds[i].type);
546 return (-1);
547 } /* switch (ds->ds[i].type) */
548 } /* for (num_values) */
550 /*
551 * Use `memcpy' to write everything to the buffer, because the pointer
552 * may be unaligned and some architectures, such as SPARC, can't handle
553 * that.
554 */
555 packet_ptr = *ret_buffer;
556 offset = 0;
557 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
558 offset += sizeof (pkg_ph);
559 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
560 offset += sizeof (pkg_num_values);
561 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
562 offset += num_values * sizeof (uint8_t);
563 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
564 offset += num_values * sizeof (value_t);
566 assert (offset == packet_len);
568 *ret_buffer = packet_ptr + packet_len;
569 *ret_buffer_len -= packet_len;
571 free (pkg_values_types);
572 free (pkg_values);
574 return (0);
575 } /* int write_part_values */
577 static int write_part_number (char **ret_buffer, int *ret_buffer_len,
578 int type, uint64_t value)
579 {
580 char *packet_ptr;
581 int packet_len;
583 part_header_t pkg_head;
584 uint64_t pkg_value;
586 int offset;
588 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
590 if (*ret_buffer_len < packet_len)
591 return (-1);
593 pkg_head.type = htons (type);
594 pkg_head.length = htons (packet_len);
595 pkg_value = htonll (value);
597 packet_ptr = *ret_buffer;
598 offset = 0;
599 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
600 offset += sizeof (pkg_head);
601 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
602 offset += sizeof (pkg_value);
604 assert (offset == packet_len);
606 *ret_buffer = packet_ptr + packet_len;
607 *ret_buffer_len -= packet_len;
609 return (0);
610 } /* int write_part_number */
612 static int write_part_string (char **ret_buffer, int *ret_buffer_len,
613 int type, const char *str, int str_len)
614 {
615 char *buffer;
616 int buffer_len;
618 uint16_t pkg_type;
619 uint16_t pkg_length;
621 int offset;
623 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
624 if (*ret_buffer_len < buffer_len)
625 return (-1);
627 pkg_type = htons (type);
628 pkg_length = htons (buffer_len);
630 buffer = *ret_buffer;
631 offset = 0;
632 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
633 offset += sizeof (pkg_type);
634 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
635 offset += sizeof (pkg_length);
636 memcpy (buffer + offset, str, str_len);
637 offset += str_len;
638 memset (buffer + offset, '\0', 1);
639 offset += 1;
641 assert (offset == buffer_len);
643 *ret_buffer = buffer + buffer_len;
644 *ret_buffer_len -= buffer_len;
646 return (0);
647 } /* int write_part_string */
649 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
650 value_t **ret_values, int *ret_num_values)
651 {
652 char *buffer = *ret_buffer;
653 size_t buffer_len = *ret_buffer_len;
655 uint16_t tmp16;
656 size_t exp_size;
657 int i;
659 uint16_t pkg_length;
660 uint16_t pkg_type;
661 uint16_t pkg_numval;
663 uint8_t *pkg_types;
664 value_t *pkg_values;
666 if (buffer_len < 15)
667 {
668 NOTICE ("network plugin: packet is too short: "
669 "buffer_len = %zu", buffer_len);
670 return (-1);
671 }
673 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
674 buffer += sizeof (tmp16);
675 pkg_type = ntohs (tmp16);
677 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
678 buffer += sizeof (tmp16);
679 pkg_length = ntohs (tmp16);
681 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
682 buffer += sizeof (tmp16);
683 pkg_numval = ntohs (tmp16);
685 assert (pkg_type == TYPE_VALUES);
687 exp_size = 3 * sizeof (uint16_t)
688 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
689 if ((buffer_len < 0) || (buffer_len < exp_size))
690 {
691 WARNING ("network plugin: parse_part_values: "
692 "Packet too short: "
693 "Chunk of size %zu expected, "
694 "but buffer has only %zu bytes left.",
695 exp_size, buffer_len);
696 return (-1);
697 }
699 if (pkg_length != exp_size)
700 {
701 WARNING ("network plugin: parse_part_values: "
702 "Length and number of values "
703 "in the packet don't match.");
704 return (-1);
705 }
707 pkg_types = (uint8_t *) malloc (pkg_numval * sizeof (uint8_t));
708 pkg_values = (value_t *) malloc (pkg_numval * sizeof (value_t));
709 if ((pkg_types == NULL) || (pkg_values == NULL))
710 {
711 sfree (pkg_types);
712 sfree (pkg_values);
713 ERROR ("network plugin: parse_part_values: malloc failed.");
714 return (-1);
715 }
717 memcpy ((void *) pkg_types, (void *) buffer, pkg_numval * sizeof (uint8_t));
718 buffer += pkg_numval * sizeof (uint8_t);
719 memcpy ((void *) pkg_values, (void *) buffer, pkg_numval * sizeof (value_t));
720 buffer += pkg_numval * sizeof (value_t);
722 for (i = 0; i < pkg_numval; i++)
723 {
724 switch (pkg_types[i])
725 {
726 case DS_TYPE_COUNTER:
727 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
728 break;
730 case DS_TYPE_GAUGE:
731 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
732 break;
734 case DS_TYPE_DERIVE:
735 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
736 break;
738 case DS_TYPE_ABSOLUTE:
739 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
740 break;
742 default:
743 NOTICE ("network plugin: parse_part_values: "
744 "Don't know how to handle data source type %"PRIu8,
745 pkg_types[i]);
746 sfree (pkg_types);
747 sfree (pkg_values);
748 return (-1);
749 } /* switch (pkg_types[i]) */
750 }
752 *ret_buffer = buffer;
753 *ret_buffer_len = buffer_len - pkg_length;
754 *ret_num_values = pkg_numval;
755 *ret_values = pkg_values;
757 sfree (pkg_types);
759 return (0);
760 } /* int parse_part_values */
762 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
763 uint64_t *value)
764 {
765 char *buffer = *ret_buffer;
766 size_t buffer_len = *ret_buffer_len;
768 uint16_t tmp16;
769 uint64_t tmp64;
770 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
772 uint16_t pkg_length;
773 uint16_t pkg_type;
775 if ((buffer_len < 0) || ((size_t) buffer_len < exp_size))
776 {
777 WARNING ("network plugin: parse_part_number: "
778 "Packet too short: "
779 "Chunk of size %zu expected, "
780 "but buffer has only %zu bytes left.",
781 exp_size, buffer_len);
782 return (-1);
783 }
785 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
786 buffer += sizeof (tmp16);
787 pkg_type = ntohs (tmp16);
789 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
790 buffer += sizeof (tmp16);
791 pkg_length = ntohs (tmp16);
793 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
794 buffer += sizeof (tmp64);
795 *value = ntohll (tmp64);
797 *ret_buffer = buffer;
798 *ret_buffer_len = buffer_len - pkg_length;
800 return (0);
801 } /* int parse_part_number */
803 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
804 char *output, int output_len)
805 {
806 char *buffer = *ret_buffer;
807 size_t buffer_len = *ret_buffer_len;
809 uint16_t tmp16;
810 size_t header_size = 2 * sizeof (uint16_t);
812 uint16_t pkg_length;
813 uint16_t pkg_type;
815 if ((buffer_len < 0) || (buffer_len < header_size))
816 {
817 WARNING ("network plugin: parse_part_string: "
818 "Packet too short: "
819 "Chunk of at least size %zu expected, "
820 "but buffer has only %zu bytes left.",
821 header_size, buffer_len);
822 return (-1);
823 }
825 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
826 buffer += sizeof (tmp16);
827 pkg_type = ntohs (tmp16);
829 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
830 buffer += sizeof (tmp16);
831 pkg_length = ntohs (tmp16);
833 /* Check that packet fits in the input buffer */
834 if (pkg_length > buffer_len)
835 {
836 WARNING ("network plugin: parse_part_string: "
837 "Packet too big: "
838 "Chunk of size %"PRIu16" received, "
839 "but buffer has only %zu bytes left.",
840 pkg_length, buffer_len);
841 return (-1);
842 }
844 /* Check that pkg_length is in the valid range */
845 if (pkg_length <= header_size)
846 {
847 WARNING ("network plugin: parse_part_string: "
848 "Packet too short: "
849 "Header claims this packet is only %hu "
850 "bytes long.", pkg_length);
851 return (-1);
852 }
854 /* Check that the package data fits into the output buffer.
855 * The previous if-statement ensures that:
856 * `pkg_length > header_size' */
857 if ((output_len < 0)
858 || ((size_t) output_len < ((size_t) pkg_length - header_size)))
859 {
860 WARNING ("network plugin: parse_part_string: "
861 "Output buffer too small.");
862 return (-1);
863 }
865 /* All sanity checks successfull, let's copy the data over */
866 output_len = pkg_length - header_size;
867 memcpy ((void *) output, (void *) buffer, output_len);
868 buffer += output_len;
870 /* For some very weird reason '\0' doesn't do the trick on SPARC in
871 * this statement. */
872 if (output[output_len - 1] != 0)
873 {
874 WARNING ("network plugin: parse_part_string: "
875 "Received string does not end "
876 "with a NULL-byte.");
877 return (-1);
878 }
880 *ret_buffer = buffer;
881 *ret_buffer_len = buffer_len - pkg_length;
883 return (0);
884 } /* int parse_part_string */
886 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
887 * parse_packet and vice versa. */
888 #define PP_SIGNED 0x01
889 #define PP_ENCRYPTED 0x02
890 static int parse_packet (sockent_t *se,
891 void *buffer, size_t buffer_size, int flags);
893 #define BUFFER_READ(p,s) do { \
894 memcpy ((p), buffer + buffer_offset, (s)); \
895 buffer_offset += (s); \
896 } while (0)
898 #if HAVE_LIBGCRYPT
899 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
900 void **ret_buffer, size_t *ret_buffer_len, int flags)
901 {
902 char *buffer;
903 size_t buffer_len;
904 size_t buffer_offset;
906 size_t username_len;
907 char *secret;
909 part_signature_sha256_t pss;
910 uint16_t pss_head_length;
911 char hash[sizeof (pss.hash)];
913 gcry_md_hd_t hd;
914 gcry_error_t err;
915 unsigned char *hash_ptr;
917 buffer = *ret_buffer;
918 buffer_len = *ret_buffer_len;
919 buffer_offset = 0;
921 if (se->data.server.userdb == NULL)
922 {
923 NOTICE ("network plugin: Received signed network packet but can't verify "
924 "it because no user DB has been configured. Will accept it.");
925 return (0);
926 }
928 /* Check if the buffer has enough data for this structure. */
929 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
930 return (-ENOMEM);
932 /* Read type and length header */
933 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
934 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
935 pss_head_length = ntohs (pss.head.length);
937 /* Check if the `pss_head_length' is within bounds. */
938 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
939 || (pss_head_length > buffer_len))
940 {
941 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
942 return (-1);
943 }
945 /* Copy the hash. */
946 BUFFER_READ (pss.hash, sizeof (pss.hash));
948 /* Calculate username length (without null byte) and allocate memory */
949 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
950 pss.username = malloc (username_len + 1);
951 if (pss.username == NULL)
952 return (-ENOMEM);
954 /* Read the username */
955 BUFFER_READ (pss.username, username_len);
956 pss.username[username_len] = 0;
958 assert (buffer_offset == pss_head_length);
960 /* Query the password */
961 secret = fbh_get (se->data.server.userdb, pss.username);
962 if (secret == NULL)
963 {
964 ERROR ("network plugin: Unknown user: %s", pss.username);
965 sfree (pss.username);
966 return (-ENOENT);
967 }
969 /* Create a hash device and check the HMAC */
970 hd = NULL;
971 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
972 if (err != 0)
973 {
974 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
975 gcry_strerror (err));
976 sfree (secret);
977 sfree (pss.username);
978 return (-1);
979 }
981 err = gcry_md_setkey (hd, secret, strlen (secret));
982 if (err != 0)
983 {
984 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
985 gcry_md_close (hd);
986 return (-1);
987 }
989 gcry_md_write (hd,
990 buffer + PART_SIGNATURE_SHA256_SIZE,
991 buffer_len - PART_SIGNATURE_SHA256_SIZE);
992 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
993 if (hash_ptr == NULL)
994 {
995 ERROR ("network plugin: gcry_md_read failed.");
996 gcry_md_close (hd);
997 sfree (secret);
998 sfree (pss.username);
999 return (-1);
1000 }
1001 memcpy (hash, hash_ptr, sizeof (hash));
1003 /* Clean up */
1004 gcry_md_close (hd);
1005 hd = NULL;
1007 sfree (secret);
1008 sfree (pss.username);
1010 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1011 {
1012 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1013 "Hash mismatch.");
1014 }
1015 else
1016 {
1017 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1018 flags | PP_SIGNED);
1019 }
1021 *ret_buffer = buffer + buffer_len;
1022 *ret_buffer_len = 0;
1024 return (0);
1025 } /* }}} int parse_part_sign_sha256 */
1026 /* #endif HAVE_LIBGCRYPT */
1028 #else /* if !HAVE_LIBGCRYPT */
1029 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1030 void **ret_buffer, size_t *ret_buffer_size, int flags)
1031 {
1032 static int warning_has_been_printed = 0;
1034 char *buffer;
1035 size_t buffer_size;
1036 size_t buffer_offset;
1037 uint16_t part_len;
1039 part_signature_sha256_t pss;
1041 buffer = *ret_buffer;
1042 buffer_size = *ret_buffer_size;
1043 buffer_offset = 0;
1045 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1046 return (-ENOMEM);
1048 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1049 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1050 part_len = ntohs (pss.head.length);
1052 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1053 || (part_len > buffer_size))
1054 return (-EINVAL);
1056 if (warning_has_been_printed == 0)
1057 {
1058 WARNING ("network plugin: Received signed packet, but the network "
1059 "plugin was not linked with libgcrypt, so I cannot "
1060 "verify the signature. The packet will be accepted.");
1061 warning_has_been_printed = 1;
1062 }
1064 parse_packet (se, buffer + part_len, buffer_size - part_len, flags);
1066 *ret_buffer = buffer + buffer_size;
1067 *ret_buffer_size = 0;
1069 return (0);
1070 } /* }}} int parse_part_sign_sha256 */
1071 #endif /* !HAVE_LIBGCRYPT */
1073 #if HAVE_LIBGCRYPT
1074 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1075 void **ret_buffer, size_t *ret_buffer_len,
1076 int flags)
1077 {
1078 char *buffer = *ret_buffer;
1079 size_t buffer_len = *ret_buffer_len;
1080 size_t payload_len;
1081 size_t part_size;
1082 size_t buffer_offset;
1083 uint16_t username_len;
1084 part_encryption_aes256_t pea;
1085 unsigned char hash[sizeof (pea.hash)];
1087 gcry_cipher_hd_t cypher;
1088 gcry_error_t err;
1090 /* Make sure at least the header if available. */
1091 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1092 {
1093 NOTICE ("network plugin: parse_part_encr_aes256: "
1094 "Discarding short packet.");
1095 return (-1);
1096 }
1098 buffer_offset = 0;
1100 /* Copy the unencrypted information into `pea'. */
1101 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1102 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1104 /* Check the `part size'. */
1105 part_size = ntohs (pea.head.length);
1106 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1107 || (part_size > buffer_len))
1108 {
1109 NOTICE ("network plugin: parse_part_encr_aes256: "
1110 "Discarding part with invalid size.");
1111 return (-1);
1112 }
1114 /* Read the username */
1115 BUFFER_READ (&username_len, sizeof (username_len));
1116 username_len = ntohs (username_len);
1118 if ((username_len <= 0)
1119 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1120 {
1121 NOTICE ("network plugin: parse_part_encr_aes256: "
1122 "Discarding part with invalid username length.");
1123 return (-1);
1124 }
1126 assert (username_len > 0);
1127 pea.username = malloc (username_len + 1);
1128 if (pea.username == NULL)
1129 return (-ENOMEM);
1130 BUFFER_READ (pea.username, username_len);
1131 pea.username[username_len] = 0;
1133 /* Last but not least, the initialization vector */
1134 BUFFER_READ (pea.iv, sizeof (pea.iv));
1136 /* Make sure we are at the right position */
1137 assert (buffer_offset == (username_len +
1138 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1140 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1141 pea.username);
1142 if (cypher == NULL)
1143 {
1144 sfree (pea.username);
1145 return (-1);
1146 }
1148 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1149 assert (payload_len > 0);
1151 /* Decrypt the packet in-place */
1152 err = gcry_cipher_decrypt (cypher,
1153 buffer + buffer_offset,
1154 part_size - buffer_offset,
1155 /* in = */ NULL, /* in len = */ 0);
1156 if (err != 0)
1157 {
1158 sfree (pea.username);
1159 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1160 gcry_strerror (err));
1161 return (-1);
1162 }
1164 /* Read the hash */
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)
1176 {
1177 sfree (pea.username);
1178 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1179 return (-1);
1180 }
1182 parse_packet (se, buffer + buffer_offset, payload_len,
1183 flags | PP_ENCRYPTED);
1185 /* Update return values */
1186 *ret_buffer = buffer + part_size;
1187 *ret_buffer_len = buffer_len - part_size;
1189 sfree (pea.username);
1191 return (0);
1192 } /* }}} int parse_part_encr_aes256 */
1193 /* #endif HAVE_LIBGCRYPT */
1195 #else /* if !HAVE_LIBGCRYPT */
1196 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1197 void **ret_buffer, size_t *ret_buffer_size, int flags)
1198 {
1199 static int warning_has_been_printed = 0;
1201 char *buffer;
1202 size_t buffer_size;
1203 size_t buffer_offset;
1205 part_header_t ph;
1206 size_t ph_length;
1208 buffer = *ret_buffer;
1209 buffer_size = *ret_buffer_size;
1210 buffer_offset = 0;
1212 /* parse_packet assures this minimum size. */
1213 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1215 BUFFER_READ (&ph.type, sizeof (ph.type));
1216 BUFFER_READ (&ph.length, sizeof (ph.length));
1217 ph_length = ntohs (ph.length);
1219 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1220 || (ph_length > buffer_size))
1221 {
1222 ERROR ("network plugin: AES-256 encrypted part "
1223 "with invalid length received.");
1224 return (-1);
1225 }
1227 if (warning_has_been_printed == 0)
1228 {
1229 WARNING ("network plugin: Received encrypted packet, but the network "
1230 "plugin was not linked with libgcrypt, so I cannot "
1231 "decrypt it. The part will be discarded.");
1232 warning_has_been_printed = 1;
1233 }
1235 *ret_buffer += ph_length;
1236 *ret_buffer_size -= ph_length;
1238 return (0);
1239 } /* }}} int parse_part_encr_aes256 */
1240 #endif /* !HAVE_LIBGCRYPT */
1242 #undef BUFFER_READ
1244 static int parse_packet (sockent_t *se, /* {{{ */
1245 void *buffer, size_t buffer_size, int flags)
1246 {
1247 int status;
1249 value_list_t vl = VALUE_LIST_INIT;
1250 notification_t n;
1252 #if HAVE_LIBGCRYPT
1253 int packet_was_signed = (flags & PP_SIGNED);
1254 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1255 int printed_ignore_warning = 0;
1256 #endif /* HAVE_LIBGCRYPT */
1259 memset (&vl, '\0', sizeof (vl));
1260 memset (&n, '\0', sizeof (n));
1261 status = 0;
1263 while ((status == 0) && (0 < buffer_size)
1264 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1265 {
1266 uint16_t pkg_length;
1267 uint16_t pkg_type;
1269 memcpy ((void *) &pkg_type,
1270 (void *) buffer,
1271 sizeof (pkg_type));
1272 memcpy ((void *) &pkg_length,
1273 (void *) (buffer + sizeof (pkg_type)),
1274 sizeof (pkg_length));
1276 pkg_length = ntohs (pkg_length);
1277 pkg_type = ntohs (pkg_type);
1279 if (pkg_length > buffer_size)
1280 break;
1281 /* Ensure that this loop terminates eventually */
1282 if (pkg_length < (2 * sizeof (uint16_t)))
1283 break;
1285 if (pkg_type == TYPE_ENCR_AES256)
1286 {
1287 status = parse_part_encr_aes256 (se,
1288 &buffer, &buffer_size, flags);
1289 if (status != 0)
1290 {
1291 ERROR ("network plugin: Decrypting AES256 "
1292 "part failed "
1293 "with status %i.", status);
1294 break;
1295 }
1296 }
1297 #if HAVE_LIBGCRYPT
1298 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1299 && (packet_was_encrypted == 0))
1300 {
1301 if (printed_ignore_warning == 0)
1302 {
1303 INFO ("network plugin: Unencrypted packet or "
1304 "part has been ignored.");
1305 printed_ignore_warning = 1;
1306 }
1307 buffer = ((char *) buffer) + pkg_length;
1308 continue;
1309 }
1310 #endif /* HAVE_LIBGCRYPT */
1311 else if (pkg_type == TYPE_SIGN_SHA256)
1312 {
1313 status = parse_part_sign_sha256 (se,
1314 &buffer, &buffer_size, flags);
1315 if (status != 0)
1316 {
1317 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1318 "signature failed "
1319 "with status %i.", status);
1320 break;
1321 }
1322 }
1323 #if HAVE_LIBGCRYPT
1324 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1325 && (packet_was_encrypted == 0)
1326 && (packet_was_signed == 0))
1327 {
1328 if (printed_ignore_warning == 0)
1329 {
1330 INFO ("network plugin: Unsigned packet or "
1331 "part has been ignored.");
1332 printed_ignore_warning = 1;
1333 }
1334 buffer = ((char *) buffer) + pkg_length;
1335 continue;
1336 }
1337 #endif /* HAVE_LIBGCRYPT */
1338 else if (pkg_type == TYPE_VALUES)
1339 {
1340 status = parse_part_values (&buffer, &buffer_size,
1341 &vl.values, &vl.values_len);
1342 if (status != 0)
1343 break;
1345 network_dispatch_values (&vl);
1347 sfree (vl.values);
1348 }
1349 else if (pkg_type == TYPE_TIME)
1350 {
1351 uint64_t tmp = 0;
1352 status = parse_part_number (&buffer, &buffer_size,
1353 &tmp);
1354 if (status == 0)
1355 {
1356 vl.time = (time_t) tmp;
1357 n.time = (time_t) tmp;
1358 }
1359 }
1360 else if (pkg_type == TYPE_INTERVAL)
1361 {
1362 uint64_t tmp = 0;
1363 status = parse_part_number (&buffer, &buffer_size,
1364 &tmp);
1365 if (status == 0)
1366 vl.interval = (int) tmp;
1367 }
1368 else if (pkg_type == TYPE_HOST)
1369 {
1370 status = parse_part_string (&buffer, &buffer_size,
1371 vl.host, sizeof (vl.host));
1372 if (status == 0)
1373 sstrncpy (n.host, vl.host, sizeof (n.host));
1374 }
1375 else if (pkg_type == TYPE_PLUGIN)
1376 {
1377 status = parse_part_string (&buffer, &buffer_size,
1378 vl.plugin, sizeof (vl.plugin));
1379 if (status == 0)
1380 sstrncpy (n.plugin, vl.plugin,
1381 sizeof (n.plugin));
1382 }
1383 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1384 {
1385 status = parse_part_string (&buffer, &buffer_size,
1386 vl.plugin_instance,
1387 sizeof (vl.plugin_instance));
1388 if (status == 0)
1389 sstrncpy (n.plugin_instance,
1390 vl.plugin_instance,
1391 sizeof (n.plugin_instance));
1392 }
1393 else if (pkg_type == TYPE_TYPE)
1394 {
1395 status = parse_part_string (&buffer, &buffer_size,
1396 vl.type, sizeof (vl.type));
1397 if (status == 0)
1398 sstrncpy (n.type, vl.type, sizeof (n.type));
1399 }
1400 else if (pkg_type == TYPE_TYPE_INSTANCE)
1401 {
1402 status = parse_part_string (&buffer, &buffer_size,
1403 vl.type_instance,
1404 sizeof (vl.type_instance));
1405 if (status == 0)
1406 sstrncpy (n.type_instance, vl.type_instance,
1407 sizeof (n.type_instance));
1408 }
1409 else if (pkg_type == TYPE_MESSAGE)
1410 {
1411 status = parse_part_string (&buffer, &buffer_size,
1412 n.message, sizeof (n.message));
1414 if (status != 0)
1415 {
1416 /* do nothing */
1417 }
1418 else if ((n.severity != NOTIF_FAILURE)
1419 && (n.severity != NOTIF_WARNING)
1420 && (n.severity != NOTIF_OKAY))
1421 {
1422 INFO ("network plugin: "
1423 "Ignoring notification with "
1424 "unknown severity %i.",
1425 n.severity);
1426 }
1427 else if (n.time <= 0)
1428 {
1429 INFO ("network plugin: "
1430 "Ignoring notification with "
1431 "time == 0.");
1432 }
1433 else if (strlen (n.message) <= 0)
1434 {
1435 INFO ("network plugin: "
1436 "Ignoring notification with "
1437 "an empty message.");
1438 }
1439 else
1440 {
1441 plugin_dispatch_notification (&n);
1442 }
1443 }
1444 else if (pkg_type == TYPE_SEVERITY)
1445 {
1446 uint64_t tmp = 0;
1447 status = parse_part_number (&buffer, &buffer_size,
1448 &tmp);
1449 if (status == 0)
1450 n.severity = (int) tmp;
1451 }
1452 else
1453 {
1454 DEBUG ("network plugin: parse_packet: Unknown part"
1455 " type: 0x%04hx", pkg_type);
1456 buffer = ((char *) buffer) + pkg_length;
1457 }
1458 } /* while (buffer_size > sizeof (part_header_t)) */
1460 if (status == 0 && buffer_size > 0)
1461 WARNING ("network plugin: parse_packet: Received truncated "
1462 "packet, try increasing `MaxPacketSize'");
1464 return (status);
1465 } /* }}} int parse_packet */
1467 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1468 {
1469 if (sec->fd >= 0)
1470 {
1471 close (sec->fd);
1472 sec->fd = -1;
1473 }
1474 sfree (sec->addr);
1475 #if HAVE_LIBGCRYPT
1476 sfree (sec->username);
1477 sfree (sec->password);
1478 if (sec->cypher != NULL)
1479 gcry_cipher_close (sec->cypher);
1480 #endif
1481 } /* }}} void free_sockent_client */
1483 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1484 {
1485 size_t i;
1487 for (i = 0; i < ses->fd_num; i++)
1488 {
1489 if (ses->fd[i] >= 0)
1490 {
1491 close (ses->fd[i]);
1492 ses->fd[i] = -1;
1493 }
1494 }
1496 sfree (ses->fd);
1497 #if HAVE_LIBGCRYPT
1498 sfree (ses->auth_file);
1499 fbh_destroy (ses->userdb);
1500 if (ses->cypher != NULL)
1501 gcry_cipher_close (ses->cypher);
1502 #endif
1503 } /* }}} void free_sockent_server */
1505 static void sockent_destroy (sockent_t *se) /* {{{ */
1506 {
1507 sockent_t *next;
1509 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1511 while (se != NULL)
1512 {
1513 next = se->next;
1515 sfree (se->node);
1516 sfree (se->service);
1518 if (se->type == SOCKENT_TYPE_CLIENT)
1519 free_sockent_client (&se->data.client);
1520 else
1521 free_sockent_server (&se->data.server);
1523 sfree (se);
1524 se = next;
1525 }
1526 } /* }}} void sockent_destroy */
1528 /*
1529 * int network_set_ttl
1530 *
1531 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1532 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1533 *
1534 * The `struct addrinfo' is used to destinguish between unicast and multicast
1535 * sockets.
1536 */
1537 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1538 {
1539 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1540 network_config_ttl);
1542 assert (se->type == SOCKENT_TYPE_CLIENT);
1544 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1545 return (-1);
1547 if (ai->ai_family == AF_INET)
1548 {
1549 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1550 int optname;
1552 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1553 optname = IP_MULTICAST_TTL;
1554 else
1555 optname = IP_TTL;
1557 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1558 &network_config_ttl,
1559 sizeof (network_config_ttl)) != 0)
1560 {
1561 char errbuf[1024];
1562 ERROR ("setsockopt: %s",
1563 sstrerror (errno, errbuf, sizeof (errbuf)));
1564 return (-1);
1565 }
1566 }
1567 else if (ai->ai_family == AF_INET6)
1568 {
1569 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1570 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1571 int optname;
1573 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1574 optname = IPV6_MULTICAST_HOPS;
1575 else
1576 optname = IPV6_UNICAST_HOPS;
1578 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1579 &network_config_ttl,
1580 sizeof (network_config_ttl)) != 0)
1581 {
1582 char errbuf[1024];
1583 ERROR ("setsockopt: %s",
1584 sstrerror (errno, errbuf,
1585 sizeof (errbuf)));
1586 return (-1);
1587 }
1588 }
1590 return (0);
1591 } /* int network_set_ttl */
1593 static int network_bind_socket (int fd, const struct addrinfo *ai)
1594 {
1595 int loop = 0;
1596 int yes = 1;
1598 /* allow multiple sockets to use the same PORT number */
1599 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1600 &yes, sizeof(yes)) == -1) {
1601 char errbuf[1024];
1602 ERROR ("setsockopt: %s",
1603 sstrerror (errno, errbuf, sizeof (errbuf)));
1604 return (-1);
1605 }
1607 DEBUG ("fd = %i; calling `bind'", fd);
1609 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1610 {
1611 char errbuf[1024];
1612 ERROR ("bind: %s",
1613 sstrerror (errno, errbuf, sizeof (errbuf)));
1614 return (-1);
1615 }
1617 if (ai->ai_family == AF_INET)
1618 {
1619 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1620 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1621 {
1622 struct ip_mreq mreq;
1624 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1626 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1627 mreq.imr_interface.s_addr = htonl (INADDR_ANY);
1629 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1630 &loop, sizeof (loop)) == -1)
1631 {
1632 char errbuf[1024];
1633 ERROR ("setsockopt: %s",
1634 sstrerror (errno, errbuf,
1635 sizeof (errbuf)));
1636 return (-1);
1637 }
1639 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1640 &mreq, sizeof (mreq)) == -1)
1641 {
1642 char errbuf[1024];
1643 ERROR ("setsockopt: %s",
1644 sstrerror (errno, errbuf,
1645 sizeof (errbuf)));
1646 return (-1);
1647 }
1648 }
1649 }
1650 else if (ai->ai_family == AF_INET6)
1651 {
1652 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1653 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1654 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1655 {
1656 struct ipv6_mreq mreq;
1658 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1660 memcpy (&mreq.ipv6mr_multiaddr,
1661 &addr->sin6_addr,
1662 sizeof (addr->sin6_addr));
1664 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1665 * ipv6mr_interface may be set to zeroes to
1666 * choose the default multicast interface or to
1667 * the index of a particular multicast-capable
1668 * interface if the host is multihomed.
1669 * Membership is associ-associated with a
1670 * single interface; programs running on
1671 * multihomed hosts may need to join the same
1672 * group on more than one interface.*/
1673 mreq.ipv6mr_interface = 0;
1675 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1676 &loop, sizeof (loop)) == -1)
1677 {
1678 char errbuf[1024];
1679 ERROR ("setsockopt: %s",
1680 sstrerror (errno, errbuf,
1681 sizeof (errbuf)));
1682 return (-1);
1683 }
1685 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1686 &mreq, sizeof (mreq)) == -1)
1687 {
1688 char errbuf[1024];
1689 ERROR ("setsockopt: %s",
1690 sstrerror (errno, errbuf,
1691 sizeof (errbuf)));
1692 return (-1);
1693 }
1694 }
1695 }
1697 return (0);
1698 } /* int network_bind_socket */
1700 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
1701 * or `SOCKENT_TYPE_SERVER' */
1702 static int sockent_init (sockent_t *se, int type) /* {{{ */
1703 {
1704 if (se == NULL)
1705 return (-1);
1707 memset (se, 0, sizeof (*se));
1709 se->type = SOCKENT_TYPE_CLIENT;
1710 se->node = NULL;
1711 se->service = NULL;
1712 se->next = NULL;
1714 if (type == SOCKENT_TYPE_SERVER)
1715 {
1716 se->type = SOCKENT_TYPE_SERVER;
1717 se->data.server.fd = NULL;
1718 #if HAVE_LIBGCRYPT
1719 se->data.server.security_level = SECURITY_LEVEL_NONE;
1720 se->data.server.auth_file = NULL;
1721 se->data.server.userdb = NULL;
1722 se->data.server.cypher = NULL;
1723 #endif
1724 }
1725 else
1726 {
1727 se->data.client.fd = -1;
1728 se->data.client.addr = NULL;
1729 #if HAVE_LIBGCRYPT
1730 se->data.client.security_level = SECURITY_LEVEL_NONE;
1731 se->data.client.username = NULL;
1732 se->data.client.password = NULL;
1733 se->data.client.cypher = NULL;
1734 #endif
1735 }
1737 return (0);
1738 } /* }}} int sockent_init */
1740 /* Open the file descriptors for a initialized sockent structure. */
1741 static int sockent_open (sockent_t *se) /* {{{ */
1742 {
1743 struct addrinfo ai_hints;
1744 struct addrinfo *ai_list, *ai_ptr;
1745 int ai_return;
1747 const char *node;
1748 const char *service;
1750 if (se == NULL)
1751 return (-1);
1753 /* Set up the security structures. */
1754 #if HAVE_LIBGCRYPT /* {{{ */
1755 if (se->type == SOCKENT_TYPE_CLIENT)
1756 {
1757 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
1758 {
1759 if ((se->data.client.username == NULL)
1760 || (se->data.client.password == NULL))
1761 {
1762 ERROR ("network plugin: Client socket with "
1763 "security requested, but no "
1764 "credentials are configured.");
1765 return (-1);
1766 }
1767 gcry_md_hash_buffer (GCRY_MD_SHA256,
1768 se->data.client.password_hash,
1769 se->data.client.password,
1770 strlen (se->data.client.password));
1771 }
1772 }
1773 else /* (se->type == SOCKENT_TYPE_SERVER) */
1774 {
1775 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
1776 {
1777 if (se->data.server.auth_file == NULL)
1778 {
1779 ERROR ("network plugin: Server socket with "
1780 "security requested, but no "
1781 "password file is configured.");
1782 return (-1);
1783 }
1784 }
1785 if (se->data.server.auth_file != NULL)
1786 {
1787 se->data.server.userdb = fbh_create (se->data.server.auth_file);
1788 if (se->data.server.userdb == NULL)
1789 {
1790 ERROR ("network plugin: Reading password file "
1791 "`%s' failed.",
1792 se->data.server.auth_file);
1793 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
1794 return (-1);
1795 }
1796 }
1797 }
1798 #endif /* }}} HAVE_LIBGCRYPT */
1800 node = se->node;
1801 service = se->service;
1803 if (service == NULL)
1804 service = NET_DEFAULT_PORT;
1806 DEBUG ("network plugin: sockent_open: node = %s; service = %s;",
1807 node, service);
1809 memset (&ai_hints, 0, sizeof (ai_hints));
1810 ai_hints.ai_flags = 0;
1811 #ifdef AI_PASSIVE
1812 ai_hints.ai_flags |= AI_PASSIVE;
1813 #endif
1814 #ifdef AI_ADDRCONFIG
1815 ai_hints.ai_flags |= AI_ADDRCONFIG;
1816 #endif
1817 ai_hints.ai_family = AF_UNSPEC;
1818 ai_hints.ai_socktype = SOCK_DGRAM;
1819 ai_hints.ai_protocol = IPPROTO_UDP;
1821 ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
1822 if (ai_return != 0)
1823 {
1824 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
1825 (se->node == NULL) ? "(null)" : se->node,
1826 (se->service == NULL) ? "(null)" : se->service,
1827 gai_strerror (ai_return));
1828 return (-1);
1829 }
1831 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1832 {
1833 int status;
1835 if (se->type == SOCKENT_TYPE_SERVER) /* {{{ */
1836 {
1837 int *tmp;
1839 tmp = realloc (se->data.server.fd,
1840 sizeof (*tmp) * (se->data.server.fd_num + 1));
1841 if (tmp == NULL)
1842 {
1843 ERROR ("network plugin: realloc failed.");
1844 continue;
1845 }
1846 se->data.server.fd = tmp;
1847 tmp = se->data.server.fd + se->data.server.fd_num;
1849 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
1850 ai_ptr->ai_protocol);
1851 if (*tmp < 0)
1852 {
1853 char errbuf[1024];
1854 ERROR ("network plugin: socket(2) failed: %s",
1855 sstrerror (errno, errbuf,
1856 sizeof (errbuf)));
1857 continue;
1858 }
1860 status = network_bind_socket (*tmp, ai_ptr);
1861 if (status != 0)
1862 {
1863 close (*tmp);
1864 *tmp = -1;
1865 continue;
1866 }
1868 se->data.server.fd_num++;
1869 continue;
1870 } /* }}} if (se->type == SOCKENT_TYPE_SERVER) */
1871 else /* if (se->type == SOCKENT_TYPE_CLIENT) {{{ */
1872 {
1873 se->data.client.fd = socket (ai_ptr->ai_family,
1874 ai_ptr->ai_socktype,
1875 ai_ptr->ai_protocol);
1876 if (se->data.client.fd < 0)
1877 {
1878 char errbuf[1024];
1879 ERROR ("network plugin: socket(2) failed: %s",
1880 sstrerror (errno, errbuf,
1881 sizeof (errbuf)));
1882 continue;
1883 }
1885 se->data.client.addr = malloc (sizeof (*se->data.client.addr));
1886 if (se->data.client.addr == NULL)
1887 {
1888 ERROR ("network plugin: malloc failed.");
1889 close (se->data.client.fd);
1890 se->data.client.fd = -1;
1891 continue;
1892 }
1894 memset (se->data.client.addr, 0, sizeof (*se->data.client.addr));
1895 assert (sizeof (*se->data.client.addr) >= ai_ptr->ai_addrlen);
1896 memcpy (se->data.client.addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1897 se->data.client.addrlen = ai_ptr->ai_addrlen;
1899 network_set_ttl (se, ai_ptr);
1901 /* We don't open more than one write-socket per
1902 * node/service pair.. */
1903 break;
1904 } /* }}} if (se->type == SOCKENT_TYPE_CLIENT) */
1905 } /* for (ai_list) */
1907 freeaddrinfo (ai_list);
1909 /* Check if all went well. */
1910 if (se->type == SOCKENT_TYPE_SERVER)
1911 {
1912 if (se->data.server.fd_num <= 0)
1913 return (-1);
1914 }
1915 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
1916 {
1917 if (se->data.client.fd < 0)
1918 return (-1);
1919 }
1921 return (0);
1922 } /* }}} int sockent_open */
1924 /* Add a sockent to the global list of sockets */
1925 static int sockent_add (sockent_t *se) /* {{{ */
1926 {
1927 sockent_t *last_ptr;
1929 if (se == NULL)
1930 return (-1);
1932 if (se->type == SOCKENT_TYPE_SERVER)
1933 {
1934 struct pollfd *tmp;
1935 size_t i;
1937 tmp = realloc (listen_sockets_pollfd,
1938 sizeof (*tmp) * (listen_sockets_num
1939 + se->data.server.fd_num));
1940 if (tmp == NULL)
1941 {
1942 ERROR ("network plugin: realloc failed.");
1943 return (-1);
1944 }
1945 listen_sockets_pollfd = tmp;
1946 tmp = listen_sockets_pollfd + listen_sockets_num;
1948 for (i = 0; i < se->data.server.fd_num; i++)
1949 {
1950 memset (tmp + i, 0, sizeof (*tmp));
1951 tmp[i].fd = se->data.server.fd[i];
1952 tmp[i].events = POLLIN | POLLPRI;
1953 tmp[i].revents = 0;
1954 }
1956 listen_sockets_num += se->data.server.fd_num;
1958 if (listen_sockets == NULL)
1959 {
1960 listen_sockets = se;
1961 return (0);
1962 }
1963 last_ptr = listen_sockets;
1964 }
1965 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
1966 {
1967 if (sending_sockets == NULL)
1968 {
1969 sending_sockets = se;
1970 return (0);
1971 }
1972 last_ptr = sending_sockets;
1973 }
1975 while (last_ptr->next != NULL)
1976 last_ptr = last_ptr->next;
1977 last_ptr->next = se;
1979 return (0);
1980 } /* }}} int sockent_add */
1982 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
1983 {
1984 while (42)
1985 {
1986 receive_list_entry_t *ent;
1987 sockent_t *se;
1989 /* Lock and wait for more data to come in */
1990 pthread_mutex_lock (&receive_list_lock);
1991 while ((listen_loop == 0)
1992 && (receive_list_head == NULL))
1993 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
1995 /* Remove the head entry and unlock */
1996 ent = receive_list_head;
1997 if (ent != NULL)
1998 receive_list_head = ent->next;
1999 receive_list_length--;
2000 pthread_mutex_unlock (&receive_list_lock);
2002 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2003 * because we dispatch all missing packets before shutting down. */
2004 if (ent == NULL)
2005 break;
2007 /* Look for the correct `sockent_t' */
2008 se = listen_sockets;
2009 while (se != NULL)
2010 {
2011 size_t i;
2013 for (i = 0; i < se->data.server.fd_num; i++)
2014 if (se->data.server.fd[i] == ent->fd)
2015 break;
2017 if (i < se->data.server.fd_num)
2018 break;
2020 se = se->next;
2021 }
2023 if (se == NULL)
2024 {
2025 ERROR ("network plugin: Got packet from FD %i, but can't "
2026 "find an appropriate socket entry.",
2027 ent->fd);
2028 sfree (ent->data);
2029 sfree (ent);
2030 continue;
2031 }
2033 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0);
2034 sfree (ent->data);
2035 sfree (ent);
2036 } /* while (42) */
2038 return (NULL);
2039 } /* }}} void *dispatch_thread */
2041 static int network_receive (void) /* {{{ */
2042 {
2043 char buffer[network_config_packet_size];
2044 int buffer_len;
2046 int i;
2047 int status;
2049 receive_list_entry_t *private_list_head;
2050 receive_list_entry_t *private_list_tail;
2051 uint64_t private_list_length;
2053 assert (listen_sockets_num > 0);
2055 private_list_head = NULL;
2056 private_list_tail = NULL;
2057 private_list_length = 0;
2059 while (listen_loop == 0)
2060 {
2061 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2063 if (status <= 0)
2064 {
2065 char errbuf[1024];
2066 if (errno == EINTR)
2067 continue;
2068 ERROR ("poll failed: %s",
2069 sstrerror (errno, errbuf, sizeof (errbuf)));
2070 return (-1);
2071 }
2073 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2074 {
2075 receive_list_entry_t *ent;
2077 if ((listen_sockets_pollfd[i].revents
2078 & (POLLIN | POLLPRI)) == 0)
2079 continue;
2080 status--;
2082 buffer_len = recv (listen_sockets_pollfd[i].fd,
2083 buffer, sizeof (buffer),
2084 0 /* no flags */);
2085 if (buffer_len < 0)
2086 {
2087 char errbuf[1024];
2088 ERROR ("recv failed: %s",
2089 sstrerror (errno, errbuf,
2090 sizeof (errbuf)));
2091 return (-1);
2092 }
2094 stats_octets_rx += ((uint64_t) buffer_len);
2095 stats_packets_rx++;
2097 /* TODO: Possible performance enhancement: Do not free
2098 * these entries in the dispatch thread but put them in
2099 * another list, so we don't have to allocate more and
2100 * more of these structures. */
2101 ent = malloc (sizeof (receive_list_entry_t));
2102 if (ent == NULL)
2103 {
2104 ERROR ("network plugin: malloc failed.");
2105 return (-1);
2106 }
2107 memset (ent, 0, sizeof (receive_list_entry_t));
2108 ent->data = malloc (network_config_packet_size);
2109 if (ent->data == NULL)
2110 {
2111 sfree (ent);
2112 ERROR ("network plugin: malloc failed.");
2113 return (-1);
2114 }
2115 ent->fd = listen_sockets_pollfd[i].fd;
2116 ent->next = NULL;
2118 memcpy (ent->data, buffer, buffer_len);
2119 ent->data_len = buffer_len;
2121 if (private_list_head == NULL)
2122 private_list_head = ent;
2123 else
2124 private_list_tail->next = ent;
2125 private_list_tail = ent;
2126 private_list_length++;
2128 /* Do not block here. Blocking here has led to
2129 * insufficient performance in the past. */
2130 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2131 {
2132 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2133 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2135 if (receive_list_head == NULL)
2136 receive_list_head = private_list_head;
2137 else
2138 receive_list_tail->next = private_list_head;
2139 receive_list_tail = private_list_tail;
2140 receive_list_length += private_list_length;
2142 pthread_cond_signal (&receive_list_cond);
2143 pthread_mutex_unlock (&receive_list_lock);
2145 private_list_head = NULL;
2146 private_list_tail = NULL;
2147 private_list_length = 0;
2148 }
2149 } /* for (listen_sockets_pollfd) */
2150 } /* while (listen_loop == 0) */
2152 /* Make sure everything is dispatched before exiting. */
2153 if (private_list_head != NULL)
2154 {
2155 pthread_mutex_lock (&receive_list_lock);
2157 if (receive_list_head == NULL)
2158 receive_list_head = private_list_head;
2159 else
2160 receive_list_tail->next = private_list_head;
2161 receive_list_tail = private_list_tail;
2162 receive_list_length += private_list_length;
2164 private_list_head = NULL;
2165 private_list_tail = NULL;
2166 private_list_length = 0;
2168 pthread_cond_signal (&receive_list_cond);
2169 pthread_mutex_unlock (&receive_list_lock);
2170 }
2172 return (0);
2173 } /* }}} int network_receive */
2175 static void *receive_thread (void __attribute__((unused)) *arg)
2176 {
2177 return (network_receive () ? (void *) 1 : (void *) 0);
2178 } /* void *receive_thread */
2180 static void network_init_buffer (void)
2181 {
2182 memset (send_buffer, 0, network_config_packet_size);
2183 send_buffer_ptr = send_buffer;
2184 send_buffer_fill = 0;
2186 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2187 } /* int network_init_buffer */
2189 static void networt_send_buffer_plain (const sockent_t *se, /* {{{ */
2190 const char *buffer, size_t buffer_size)
2191 {
2192 int status;
2194 while (42)
2195 {
2196 status = sendto (se->data.client.fd, buffer, buffer_size,
2197 /* flags = */ 0,
2198 (struct sockaddr *) se->data.client.addr,
2199 se->data.client.addrlen);
2200 if (status < 0)
2201 {
2202 char errbuf[1024];
2203 if (errno == EINTR)
2204 continue;
2205 ERROR ("network plugin: sendto failed: %s",
2206 sstrerror (errno, errbuf,
2207 sizeof (errbuf)));
2208 break;
2209 }
2211 break;
2212 } /* while (42) */
2213 } /* }}} void networt_send_buffer_plain */
2215 #if HAVE_LIBGCRYPT
2216 #define BUFFER_ADD(p,s) do { \
2217 memcpy (buffer + buffer_offset, (p), (s)); \
2218 buffer_offset += (s); \
2219 } while (0)
2221 static void networt_send_buffer_signed (const sockent_t *se, /* {{{ */
2222 const char *in_buffer, size_t in_buffer_size)
2223 {
2224 part_signature_sha256_t ps;
2225 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2226 size_t buffer_offset;
2227 size_t username_len;
2229 gcry_md_hd_t hd;
2230 gcry_error_t err;
2231 unsigned char *hash;
2233 hd = NULL;
2234 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2235 if (err != 0)
2236 {
2237 ERROR ("network plugin: Creating HMAC object failed: %s",
2238 gcry_strerror (err));
2239 return;
2240 }
2242 err = gcry_md_setkey (hd, se->data.client.password,
2243 strlen (se->data.client.password));
2244 if (err != 0)
2245 {
2246 ERROR ("network plugin: gcry_md_setkey failed: %s",
2247 gcry_strerror (err));
2248 gcry_md_close (hd);
2249 return;
2250 }
2252 username_len = strlen (se->data.client.username);
2253 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2254 {
2255 ERROR ("network plugin: Username too long: %s",
2256 se->data.client.username);
2257 return;
2258 }
2260 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2261 se->data.client.username, username_len);
2262 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2263 in_buffer, in_buffer_size);
2265 /* Initialize the `ps' structure. */
2266 memset (&ps, 0, sizeof (ps));
2267 ps.head.type = htons (TYPE_SIGN_SHA256);
2268 ps.head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len);
2270 /* Calculate the hash value. */
2271 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2272 username_len + in_buffer_size);
2273 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2274 if (hash == NULL)
2275 {
2276 ERROR ("network plugin: gcry_md_read failed.");
2277 gcry_md_close (hd);
2278 return;
2279 }
2280 memcpy (ps.hash, hash, sizeof (ps.hash));
2282 /* Add the header */
2283 buffer_offset = 0;
2285 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2286 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2287 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2289 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2291 gcry_md_close (hd);
2292 hd = NULL;
2294 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2295 networt_send_buffer_plain (se, buffer, buffer_offset);
2296 } /* }}} void networt_send_buffer_signed */
2298 static void networt_send_buffer_encrypted (sockent_t *se, /* {{{ */
2299 const char *in_buffer, size_t in_buffer_size)
2300 {
2301 part_encryption_aes256_t pea;
2302 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2303 size_t buffer_size;
2304 size_t buffer_offset;
2305 size_t header_size;
2306 size_t username_len;
2307 gcry_error_t err;
2308 gcry_cipher_hd_t cypher;
2310 /* Initialize the header fields */
2311 memset (&pea, 0, sizeof (pea));
2312 pea.head.type = htons (TYPE_ENCR_AES256);
2314 pea.username = se->data.client.username;
2316 username_len = strlen (pea.username);
2317 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2318 {
2319 ERROR ("network plugin: Username too long: %s", pea.username);
2320 return;
2321 }
2323 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2324 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2325 - sizeof (pea.hash);
2327 assert (buffer_size <= sizeof (buffer));
2328 DEBUG ("network plugin: networt_send_buffer_encrypted: "
2329 "buffer_size = %zu;", buffer_size);
2331 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2332 + username_len + in_buffer_size));
2333 pea.username_length = htons ((uint16_t) username_len);
2335 /* Chose a random initialization vector. */
2336 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2338 /* Create hash of the payload */
2339 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2341 /* Initialize the buffer */
2342 buffer_offset = 0;
2343 memset (buffer, 0, sizeof (buffer));
2346 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2347 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2348 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2349 BUFFER_ADD (pea.username, username_len);
2350 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2351 assert (buffer_offset == header_size);
2352 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2353 BUFFER_ADD (in_buffer, in_buffer_size);
2355 assert (buffer_offset == buffer_size);
2357 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2358 se->data.client.password);
2359 if (cypher == NULL)
2360 return;
2362 /* Encrypt the buffer in-place */
2363 err = gcry_cipher_encrypt (cypher,
2364 buffer + header_size,
2365 buffer_size - header_size,
2366 /* in = */ NULL, /* in len = */ 0);
2367 if (err != 0)
2368 {
2369 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2370 gcry_strerror (err));
2371 return;
2372 }
2374 /* Send it out without further modifications */
2375 networt_send_buffer_plain (se, buffer, buffer_size);
2376 } /* }}} void networt_send_buffer_encrypted */
2377 #undef BUFFER_ADD
2378 #endif /* HAVE_LIBGCRYPT */
2380 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2381 {
2382 sockent_t *se;
2384 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2386 for (se = sending_sockets; se != NULL; se = se->next)
2387 {
2388 #if HAVE_LIBGCRYPT
2389 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2390 networt_send_buffer_encrypted (se, buffer, buffer_len);
2391 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2392 networt_send_buffer_signed (se, buffer, buffer_len);
2393 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2394 #endif /* HAVE_LIBGCRYPT */
2395 networt_send_buffer_plain (se, buffer, buffer_len);
2396 } /* for (sending_sockets) */
2397 } /* }}} void network_send_buffer */
2399 static int add_to_buffer (char *buffer, int buffer_size, /* {{{ */
2400 value_list_t *vl_def,
2401 const data_set_t *ds, const value_list_t *vl)
2402 {
2403 char *buffer_orig = buffer;
2405 if (strcmp (vl_def->host, vl->host) != 0)
2406 {
2407 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2408 vl->host, strlen (vl->host)) != 0)
2409 return (-1);
2410 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2411 }
2413 if (vl_def->time != vl->time)
2414 {
2415 if (write_part_number (&buffer, &buffer_size, TYPE_TIME,
2416 (uint64_t) vl->time))
2417 return (-1);
2418 vl_def->time = vl->time;
2419 }
2421 if (vl_def->interval != vl->interval)
2422 {
2423 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL,
2424 (uint64_t) vl->interval))
2425 return (-1);
2426 vl_def->interval = vl->interval;
2427 }
2429 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2430 {
2431 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2432 vl->plugin, strlen (vl->plugin)) != 0)
2433 return (-1);
2434 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2435 }
2437 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2438 {
2439 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2440 vl->plugin_instance,
2441 strlen (vl->plugin_instance)) != 0)
2442 return (-1);
2443 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2444 }
2446 if (strcmp (vl_def->type, vl->type) != 0)
2447 {
2448 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2449 vl->type, strlen (vl->type)) != 0)
2450 return (-1);
2451 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2452 }
2454 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2455 {
2456 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2457 vl->type_instance,
2458 strlen (vl->type_instance)) != 0)
2459 return (-1);
2460 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2461 }
2463 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2464 return (-1);
2466 return (buffer - buffer_orig);
2467 } /* }}} int add_to_buffer */
2469 static void flush_buffer (void)
2470 {
2471 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2472 send_buffer_fill);
2474 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2476 stats_octets_tx += ((uint64_t) send_buffer_fill);
2477 stats_packets_tx++;
2479 network_init_buffer ();
2480 }
2482 static int network_write (const data_set_t *ds, const value_list_t *vl,
2483 user_data_t __attribute__((unused)) *user_data)
2484 {
2485 int status;
2487 if (!check_send_okay (vl))
2488 {
2489 #if COLLECT_DEBUG
2490 char name[6*DATA_MAX_NAME_LEN];
2491 FORMAT_VL (name, sizeof (name), vl);
2492 name[sizeof (name) - 1] = 0;
2493 DEBUG ("network plugin: network_write: "
2494 "NOT sending %s.", name);
2495 #endif
2496 /* Counter is not protected by another lock and may be reached by
2497 * multiple threads */
2498 pthread_mutex_lock (&stats_lock);
2499 stats_values_not_sent++;
2500 pthread_mutex_unlock (&stats_lock);
2501 return (0);
2502 }
2504 uc_meta_data_add_unsigned_int (vl,
2505 "network:time_sent", (uint64_t) vl->time);
2507 pthread_mutex_lock (&send_buffer_lock);
2509 status = add_to_buffer (send_buffer_ptr,
2510 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2511 &send_buffer_vl,
2512 ds, vl);
2513 if (status >= 0)
2514 {
2515 /* status == bytes added to the buffer */
2516 send_buffer_fill += status;
2517 send_buffer_ptr += status;
2519 stats_values_sent++;
2520 }
2521 else
2522 {
2523 flush_buffer ();
2525 status = add_to_buffer (send_buffer_ptr,
2526 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2527 &send_buffer_vl,
2528 ds, vl);
2530 if (status >= 0)
2531 {
2532 send_buffer_fill += status;
2533 send_buffer_ptr += status;
2535 stats_values_sent++;
2536 }
2537 }
2539 if (status < 0)
2540 {
2541 ERROR ("network plugin: Unable to append to the "
2542 "buffer for some weird reason");
2543 }
2544 else if ((network_config_packet_size - send_buffer_fill) < 15)
2545 {
2546 flush_buffer ();
2547 }
2549 pthread_mutex_unlock (&send_buffer_lock);
2551 return ((status < 0) ? -1 : 0);
2552 } /* int network_write */
2554 static int network_config_set_boolean (const oconfig_item_t *ci, /* {{{ */
2555 int *retval)
2556 {
2557 if ((ci->values_num != 1)
2558 || ((ci->values[0].type != OCONFIG_TYPE_BOOLEAN)
2559 && (ci->values[0].type != OCONFIG_TYPE_STRING)))
2560 {
2561 ERROR ("network plugin: The `%s' config option needs "
2562 "exactly one boolean argument.", ci->key);
2563 return (-1);
2564 }
2566 if (ci->values[0].type == OCONFIG_TYPE_BOOLEAN)
2567 {
2568 if (ci->values[0].value.boolean)
2569 *retval = 1;
2570 else
2571 *retval = 0;
2572 }
2573 else
2574 {
2575 char *str = ci->values[0].value.string;
2577 if (IS_TRUE (str))
2578 *retval = 1;
2579 else if (IS_FALSE (str))
2580 *retval = 0;
2581 else
2582 {
2583 ERROR ("network plugin: Cannot parse string value `%s' of the `%s' "
2584 "option as boolean value.",
2585 str, ci->key);
2586 return (-1);
2587 }
2588 }
2590 return (0);
2591 } /* }}} int network_config_set_boolean */
2593 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2594 {
2595 int tmp;
2596 if ((ci->values_num != 1)
2597 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2598 {
2599 WARNING ("network plugin: The `TimeToLive' config option needs exactly "
2600 "one numeric argument.");
2601 return (-1);
2602 }
2604 tmp = (int) ci->values[0].value.number;
2605 if ((tmp > 0) && (tmp <= 255))
2606 network_config_ttl = tmp;
2608 return (0);
2609 } /* }}} int network_config_set_ttl */
2611 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
2612 {
2613 int tmp;
2614 if ((ci->values_num != 1)
2615 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2616 {
2617 WARNING ("network plugin: The `MaxPacketSize' config option needs exactly "
2618 "one numeric argument.");
2619 return (-1);
2620 }
2622 tmp = (int) ci->values[0].value.number;
2623 if ((tmp >= 1024) && (tmp <= 65535))
2624 network_config_packet_size = tmp;
2626 return (0);
2627 } /* }}} int network_config_set_buffer_size */
2629 #if HAVE_LIBGCRYPT
2630 static int network_config_set_string (const oconfig_item_t *ci, /* {{{ */
2631 char **ret_string)
2632 {
2633 char *tmp;
2634 if ((ci->values_num != 1)
2635 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2636 {
2637 WARNING ("network plugin: The `%s' config option needs exactly "
2638 "one string argument.", ci->key);
2639 return (-1);
2640 }
2642 tmp = strdup (ci->values[0].value.string);
2643 if (tmp == NULL)
2644 return (-1);
2646 sfree (*ret_string);
2647 *ret_string = tmp;
2649 return (0);
2650 } /* }}} int network_config_set_string */
2651 #endif /* HAVE_LIBGCRYPT */
2653 #if HAVE_LIBGCRYPT
2654 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
2655 int *retval)
2656 {
2657 char *str;
2658 if ((ci->values_num != 1)
2659 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2660 {
2661 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
2662 "one string argument.");
2663 return (-1);
2664 }
2666 str = ci->values[0].value.string;
2667 if (strcasecmp ("Encrypt", str) == 0)
2668 *retval = SECURITY_LEVEL_ENCRYPT;
2669 else if (strcasecmp ("Sign", str) == 0)
2670 *retval = SECURITY_LEVEL_SIGN;
2671 else if (strcasecmp ("None", str) == 0)
2672 *retval = SECURITY_LEVEL_NONE;
2673 else
2674 {
2675 WARNING ("network plugin: Unknown security level: %s.", str);
2676 return (-1);
2677 }
2679 return (0);
2680 } /* }}} int network_config_set_security_level */
2681 #endif /* HAVE_LIBGCRYPT */
2683 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
2684 {
2685 sockent_t *se;
2686 int status;
2687 int i;
2689 if ((ci->values_num < 1) || (ci->values_num > 2)
2690 || (ci->values[0].type != OCONFIG_TYPE_STRING)
2691 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
2692 {
2693 ERROR ("network plugin: The `%s' config option needs "
2694 "one or two string arguments.", ci->key);
2695 return (-1);
2696 }
2698 se = malloc (sizeof (*se));
2699 if (se == NULL)
2700 {
2701 ERROR ("network plugin: malloc failed.");
2702 return (-1);
2703 }
2704 sockent_init (se, SOCKENT_TYPE_SERVER);
2706 se->node = strdup (ci->values[0].value.string);
2707 if (ci->values_num >= 2)
2708 se->service = strdup (ci->values[1].value.string);
2710 for (i = 0; i < ci->children_num; i++)
2711 {
2712 oconfig_item_t *child = ci->children + i;
2714 #if HAVE_LIBGCRYPT
2715 if (strcasecmp ("AuthFile", child->key) == 0)
2716 network_config_set_string (child, &se->data.server.auth_file);
2717 else if (strcasecmp ("SecurityLevel", child->key) == 0)
2718 network_config_set_security_level (child,
2719 &se->data.server.security_level);
2720 else
2721 #endif /* HAVE_LIBGCRYPT */
2722 {
2723 WARNING ("network plugin: Option `%s' is not allowed here.",
2724 child->key);
2725 }
2726 }
2728 #if HAVE_LIBGCRYPT
2729 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
2730 && (se->data.server.auth_file == NULL))
2731 {
2732 ERROR ("network plugin: A security level higher than `none' was "
2733 "requested, but no AuthFile option was given. Cowardly refusing to "
2734 "open this socket!");
2735 sockent_destroy (se);
2736 return (-1);
2737 }
2738 #endif /* HAVE_LIBGCRYPT */
2740 status = sockent_open (se);
2741 if (status != 0)
2742 {
2743 ERROR ("network plugin: network_config_add_listen: sockent_open failed.");
2744 sockent_destroy (se);
2745 return (-1);
2746 }
2748 status = sockent_add (se);
2749 if (status != 0)
2750 {
2751 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
2752 sockent_destroy (se);
2753 return (-1);
2754 }
2756 return (0);
2757 } /* }}} int network_config_add_listen */
2759 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
2760 {
2761 sockent_t *se;
2762 int status;
2763 int i;
2765 if ((ci->values_num < 1) || (ci->values_num > 2)
2766 || (ci->values[0].type != OCONFIG_TYPE_STRING)
2767 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
2768 {
2769 ERROR ("network plugin: The `%s' config option needs "
2770 "one or two string arguments.", ci->key);
2771 return (-1);
2772 }
2774 se = malloc (sizeof (*se));
2775 if (se == NULL)
2776 {
2777 ERROR ("network plugin: malloc failed.");
2778 return (-1);
2779 }
2780 sockent_init (se, SOCKENT_TYPE_CLIENT);
2782 se->node = strdup (ci->values[0].value.string);
2783 if (ci->values_num >= 2)
2784 se->service = strdup (ci->values[1].value.string);
2786 for (i = 0; i < ci->children_num; i++)
2787 {
2788 oconfig_item_t *child = ci->children + i;
2790 #if HAVE_LIBGCRYPT
2791 if (strcasecmp ("Username", child->key) == 0)
2792 network_config_set_string (child, &se->data.client.username);
2793 else if (strcasecmp ("Password", child->key) == 0)
2794 network_config_set_string (child, &se->data.client.password);
2795 else if (strcasecmp ("SecurityLevel", child->key) == 0)
2796 network_config_set_security_level (child,
2797 &se->data.client.security_level);
2798 else
2799 #endif /* HAVE_LIBGCRYPT */
2800 {
2801 WARNING ("network plugin: Option `%s' is not allowed here.",
2802 child->key);
2803 }
2804 }
2806 #if HAVE_LIBGCRYPT
2807 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
2808 && ((se->data.client.username == NULL)
2809 || (se->data.client.password == NULL)))
2810 {
2811 ERROR ("network plugin: A security level higher than `none' was "
2812 "requested, but no Username or Password option was given. "
2813 "Cowardly refusing to open this socket!");
2814 sockent_destroy (se);
2815 return (-1);
2816 }
2817 #endif /* HAVE_LIBGCRYPT */
2819 status = sockent_open (se);
2820 if (status != 0)
2821 {
2822 ERROR ("network plugin: network_config_add_server: sockent_open failed.");
2823 sockent_destroy (se);
2824 return (-1);
2825 }
2827 status = sockent_add (se);
2828 if (status != 0)
2829 {
2830 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
2831 sockent_destroy (se);
2832 return (-1);
2833 }
2835 return (0);
2836 } /* }}} int network_config_add_server */
2838 static int network_config (oconfig_item_t *ci) /* {{{ */
2839 {
2840 int i;
2842 for (i = 0; i < ci->children_num; i++)
2843 {
2844 oconfig_item_t *child = ci->children + i;
2846 if (strcasecmp ("Listen", child->key) == 0)
2847 network_config_add_listen (child);
2848 else if (strcasecmp ("Server", child->key) == 0)
2849 network_config_add_server (child);
2850 else if (strcasecmp ("TimeToLive", child->key) == 0)
2851 network_config_set_ttl (child);
2852 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
2853 network_config_set_buffer_size (child);
2854 else if (strcasecmp ("Forward", child->key) == 0)
2855 network_config_set_boolean (child, &network_config_forward);
2856 else if (strcasecmp ("ReportStats", child->key) == 0)
2857 network_config_set_boolean (child, &network_config_stats);
2858 else if (strcasecmp ("CacheFlush", child->key) == 0)
2859 /* no op for backwards compatibility only */;
2860 else
2861 {
2862 WARNING ("network plugin: Option `%s' is not allowed here.",
2863 child->key);
2864 }
2865 }
2867 return (0);
2868 } /* }}} int network_config */
2870 static int network_notification (const notification_t *n,
2871 user_data_t __attribute__((unused)) *user_data)
2872 {
2873 char buffer[network_config_packet_size];
2874 char *buffer_ptr = buffer;
2875 int buffer_free = sizeof (buffer);
2876 int status;
2878 memset (buffer, '\0', sizeof (buffer));
2881 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME,
2882 (uint64_t) n->time);
2883 if (status != 0)
2884 return (-1);
2886 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
2887 (uint64_t) n->severity);
2888 if (status != 0)
2889 return (-1);
2891 if (strlen (n->host) > 0)
2892 {
2893 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
2894 n->host, strlen (n->host));
2895 if (status != 0)
2896 return (-1);
2897 }
2899 if (strlen (n->plugin) > 0)
2900 {
2901 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
2902 n->plugin, strlen (n->plugin));
2903 if (status != 0)
2904 return (-1);
2905 }
2907 if (strlen (n->plugin_instance) > 0)
2908 {
2909 status = write_part_string (&buffer_ptr, &buffer_free,
2910 TYPE_PLUGIN_INSTANCE,
2911 n->plugin_instance, strlen (n->plugin_instance));
2912 if (status != 0)
2913 return (-1);
2914 }
2916 if (strlen (n->type) > 0)
2917 {
2918 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
2919 n->type, strlen (n->type));
2920 if (status != 0)
2921 return (-1);
2922 }
2924 if (strlen (n->type_instance) > 0)
2925 {
2926 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
2927 n->type_instance, strlen (n->type_instance));
2928 if (status != 0)
2929 return (-1);
2930 }
2932 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
2933 n->message, strlen (n->message));
2934 if (status != 0)
2935 return (-1);
2937 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
2939 return (0);
2940 } /* int network_notification */
2942 static int network_shutdown (void)
2943 {
2944 listen_loop++;
2946 /* Kill the listening thread */
2947 if (receive_thread_running != 0)
2948 {
2949 INFO ("network plugin: Stopping receive thread.");
2950 pthread_kill (receive_thread_id, SIGTERM);
2951 pthread_join (receive_thread_id, NULL /* no return value */);
2952 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
2953 receive_thread_running = 0;
2954 }
2956 /* Shutdown the dispatching thread */
2957 if (dispatch_thread_running != 0)
2958 {
2959 INFO ("network plugin: Stopping dispatch thread.");
2960 pthread_mutex_lock (&receive_list_lock);
2961 pthread_cond_broadcast (&receive_list_cond);
2962 pthread_mutex_unlock (&receive_list_lock);
2963 pthread_join (dispatch_thread_id, /* ret = */ NULL);
2964 dispatch_thread_running = 0;
2965 }
2967 sockent_destroy (listen_sockets);
2969 if (send_buffer_fill > 0)
2970 flush_buffer ();
2972 sfree (send_buffer);
2974 /* TODO: Close `sending_sockets' */
2976 plugin_unregister_config ("network");
2977 plugin_unregister_init ("network");
2978 plugin_unregister_write ("network");
2979 plugin_unregister_shutdown ("network");
2981 return (0);
2982 } /* int network_shutdown */
2984 static int network_stats_read (void) /* {{{ */
2985 {
2986 uint64_t copy_octets_rx;
2987 uint64_t copy_octets_tx;
2988 uint64_t copy_packets_rx;
2989 uint64_t copy_packets_tx;
2990 uint64_t copy_values_dispatched;
2991 uint64_t copy_values_not_dispatched;
2992 uint64_t copy_values_sent;
2993 uint64_t copy_values_not_sent;
2994 uint64_t copy_receive_list_length;
2995 value_list_t vl = VALUE_LIST_INIT;
2996 value_t values[2];
2998 copy_octets_rx = stats_octets_rx;
2999 copy_octets_tx = stats_octets_tx;
3000 copy_packets_rx = stats_packets_rx;
3001 copy_packets_tx = stats_packets_tx;
3002 copy_values_dispatched = stats_values_dispatched;
3003 copy_values_not_dispatched = stats_values_not_dispatched;
3004 copy_values_sent = stats_values_sent;
3005 copy_values_not_sent = stats_values_not_sent;
3006 copy_receive_list_length = receive_list_length;
3008 /* Initialize `vl' */
3009 vl.values = values;
3010 vl.values_len = 2;
3011 vl.time = 0;
3012 vl.interval = interval_g;
3013 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3014 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3016 /* Octets received / sent */
3017 vl.values[0].counter = (counter_t) copy_octets_rx;
3018 vl.values[1].counter = (counter_t) copy_octets_tx;
3019 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3020 plugin_dispatch_values (&vl);
3022 /* Packets received / send */
3023 vl.values[0].counter = (counter_t) copy_packets_rx;
3024 vl.values[1].counter = (counter_t) copy_packets_tx;
3025 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3026 plugin_dispatch_values (&vl);
3028 /* Values (not) dispatched and (not) send */
3029 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3030 vl.values_len = 1;
3032 vl.values[0].derive = (derive_t) copy_values_dispatched;
3033 sstrncpy (vl.type_instance, "dispatch-accepted",
3034 sizeof (vl.type_instance));
3035 plugin_dispatch_values (&vl);
3037 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3038 sstrncpy (vl.type_instance, "dispatch-rejected",
3039 sizeof (vl.type_instance));
3040 plugin_dispatch_values (&vl);
3042 vl.values[0].derive = (derive_t) copy_values_sent;
3043 sstrncpy (vl.type_instance, "send-accepted",
3044 sizeof (vl.type_instance));
3045 plugin_dispatch_values (&vl);
3047 vl.values[0].derive = (derive_t) copy_values_not_sent;
3048 sstrncpy (vl.type_instance, "send-rejected",
3049 sizeof (vl.type_instance));
3050 plugin_dispatch_values (&vl);
3052 /* Receive queue length */
3053 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3054 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3055 vl.type_instance[0] = 0;
3056 plugin_dispatch_values (&vl);
3058 return (0);
3059 } /* }}} int network_stats_read */
3061 static int network_init (void)
3062 {
3063 static _Bool have_init = false;
3065 /* Check if we were already initialized. If so, just return - there's
3066 * nothing more to do (for now, that is). */
3067 if (have_init)
3068 return (0);
3069 have_init = true;
3071 #if HAVE_LIBGCRYPT
3072 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
3073 gcry_control (GCRYCTL_INIT_SECMEM, 32768, 0);
3074 gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
3075 #endif
3077 if (network_config_stats != 0)
3078 plugin_register_read ("network", network_stats_read);
3080 plugin_register_shutdown ("network", network_shutdown);
3082 send_buffer = malloc (network_config_packet_size);
3083 if (send_buffer == NULL)
3084 {
3085 ERROR ("network plugin: malloc failed.");
3086 return (-1);
3087 }
3088 network_init_buffer ();
3090 /* setup socket(s) and so on */
3091 if (sending_sockets != NULL)
3092 {
3093 plugin_register_write ("network", network_write,
3094 /* user_data = */ NULL);
3095 plugin_register_notification ("network", network_notification,
3096 /* user_data = */ NULL);
3097 }
3099 /* If no threads need to be started, return here. */
3100 if ((listen_sockets_num == 0)
3101 || ((dispatch_thread_running != 0)
3102 && (receive_thread_running != 0)))
3103 return (0);
3105 if (dispatch_thread_running == 0)
3106 {
3107 int status;
3108 status = pthread_create (&dispatch_thread_id,
3109 NULL /* no attributes */,
3110 dispatch_thread,
3111 NULL /* no argument */);
3112 if (status != 0)
3113 {
3114 char errbuf[1024];
3115 ERROR ("network: pthread_create failed: %s",
3116 sstrerror (errno, errbuf,
3117 sizeof (errbuf)));
3118 }
3119 else
3120 {
3121 dispatch_thread_running = 1;
3122 }
3123 }
3125 if (receive_thread_running == 0)
3126 {
3127 int status;
3128 status = pthread_create (&receive_thread_id,
3129 NULL /* no attributes */,
3130 receive_thread,
3131 NULL /* no argument */);
3132 if (status != 0)
3133 {
3134 char errbuf[1024];
3135 ERROR ("network: pthread_create failed: %s",
3136 sstrerror (errno, errbuf,
3137 sizeof (errbuf)));
3138 }
3139 else
3140 {
3141 receive_thread_running = 1;
3142 }
3143 }
3145 return (0);
3146 } /* int network_init */
3148 /*
3149 * The flush option of the network plugin cannot flush individual identifiers.
3150 * All the values are added to a buffer and sent when the buffer is full, the
3151 * requested value may or may not be in there, it's not worth finding out. We
3152 * just send the buffer if `flush' is called - if the requested value was in
3153 * there, good. If not, well, then there is nothing to flush.. -octo
3154 */
3155 static int network_flush (int timeout,
3156 const char __attribute__((unused)) *identifier,
3157 user_data_t __attribute__((unused)) *user_data)
3158 {
3159 pthread_mutex_lock (&send_buffer_lock);
3161 if (send_buffer_fill > 0)
3162 flush_buffer ();
3164 pthread_mutex_unlock (&send_buffer_lock);
3166 return (0);
3167 } /* int network_flush */
3169 void module_register (void)
3170 {
3171 plugin_register_complex_config ("network", network_config);
3172 plugin_register_init ("network", network_init);
3173 plugin_register_flush ("network", network_flush,
3174 /* user_data = */ NULL);
3175 } /* void module_register */
3177 /* vim: set fdm=marker : */