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"
34 #include "utils_complain.h"
36 #include "network.h"
38 #if HAVE_PTHREAD_H
39 # include <pthread.h>
40 #endif
41 #if HAVE_SYS_SOCKET_H
42 # include <sys/socket.h>
43 #endif
44 #if HAVE_NETDB_H
45 # include <netdb.h>
46 #endif
47 #if HAVE_NETINET_IN_H
48 # include <netinet/in.h>
49 #endif
50 #if HAVE_ARPA_INET_H
51 # include <arpa/inet.h>
52 #endif
53 #if HAVE_POLL_H
54 # include <poll.h>
55 #endif
56 #if HAVE_NET_IF_H
57 # include <net/if.h>
58 #endif
60 #if HAVE_LIBGCRYPT
61 # include <gcrypt.h>
62 GCRY_THREAD_OPTION_PTHREAD_IMPL;
63 #endif
65 #ifndef IPV6_ADD_MEMBERSHIP
66 # ifdef IPV6_JOIN_GROUP
67 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
68 # else
69 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
70 # endif
71 #endif /* !IP_ADD_MEMBERSHIP */
73 /*
74 * Maximum size required for encryption / signing:
75 *
76 * 42 bytes for the encryption header
77 * + 64 bytes for the username
78 * -----------
79 * = 106 bytes
80 */
81 #define BUFF_SIG_SIZE 106
83 /*
84 * Private data types
85 */
86 #define SECURITY_LEVEL_NONE 0
87 #if HAVE_LIBGCRYPT
88 # define SECURITY_LEVEL_SIGN 1
89 # define SECURITY_LEVEL_ENCRYPT 2
90 #endif
91 struct sockent_client
92 {
93 int fd;
94 struct sockaddr_storage *addr;
95 socklen_t addrlen;
96 #if HAVE_LIBGCRYPT
97 int security_level;
98 char *username;
99 char *password;
100 gcry_cipher_hd_t cypher;
101 unsigned char password_hash[32];
102 #endif
103 };
105 struct sockent_server
106 {
107 int *fd;
108 size_t fd_num;
109 #if HAVE_LIBGCRYPT
110 int security_level;
111 char *auth_file;
112 fbhash_t *userdb;
113 gcry_cipher_hd_t cypher;
114 #endif
115 };
117 typedef struct sockent
118 {
119 #define SOCKENT_TYPE_CLIENT 1
120 #define SOCKENT_TYPE_SERVER 2
121 int type;
123 char *node;
124 char *service;
125 int interface;
127 union
128 {
129 struct sockent_client client;
130 struct sockent_server server;
131 } data;
133 struct sockent *next;
134 } sockent_t;
136 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
137 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
138 * +-------+-----------------------+-------------------------------+
139 * ! Ver. ! ! Length !
140 * +-------+-----------------------+-------------------------------+
141 */
142 struct part_header_s
143 {
144 uint16_t type;
145 uint16_t length;
146 };
147 typedef struct part_header_s part_header_t;
149 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
150 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
151 * +-------------------------------+-------------------------------+
152 * ! Type ! Length !
153 * +-------------------------------+-------------------------------+
154 * : (Length - 4) Bytes :
155 * +---------------------------------------------------------------+
156 */
157 struct part_string_s
158 {
159 part_header_t *head;
160 char *value;
161 };
162 typedef struct part_string_s part_string_t;
164 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
165 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
166 * +-------------------------------+-------------------------------+
167 * ! Type ! Length !
168 * +-------------------------------+-------------------------------+
169 * : (Length - 4 == 2 || 4 || 8) Bytes :
170 * +---------------------------------------------------------------+
171 */
172 struct part_number_s
173 {
174 part_header_t *head;
175 uint64_t *value;
176 };
177 typedef struct part_number_s part_number_t;
179 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
180 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
181 * +-------------------------------+-------------------------------+
182 * ! Type ! Length !
183 * +-------------------------------+---------------+---------------+
184 * ! Num of values ! Type0 ! Type1 !
185 * +-------------------------------+---------------+---------------+
186 * ! Value0 !
187 * ! !
188 * +---------------------------------------------------------------+
189 * ! Value1 !
190 * ! !
191 * +---------------------------------------------------------------+
192 */
193 struct part_values_s
194 {
195 part_header_t *head;
196 uint16_t *num_values;
197 uint8_t *values_types;
198 value_t *values;
199 };
200 typedef struct part_values_s part_values_t;
202 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
203 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
204 * +-------------------------------+-------------------------------+
205 * ! Type ! Length !
206 * +-------------------------------+-------------------------------+
207 * ! Hash (Bits 0 - 31) !
208 * : : :
209 * ! Hash (Bits 224 - 255) !
210 * +---------------------------------------------------------------+
211 */
212 /* Minimum size */
213 #define PART_SIGNATURE_SHA256_SIZE 36
214 struct part_signature_sha256_s
215 {
216 part_header_t head;
217 unsigned char hash[32];
218 char *username;
219 };
220 typedef struct part_signature_sha256_s part_signature_sha256_t;
222 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
223 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
224 * +-------------------------------+-------------------------------+
225 * ! Type ! Length !
226 * +-------------------------------+-------------------------------+
227 * ! Original length ! Padding (0 - 15 bytes) !
228 * +-------------------------------+-------------------------------+
229 * ! Hash (Bits 0 - 31) !
230 * : : :
231 * ! Hash (Bits 128 - 159) !
232 * +---------------------------------------------------------------+
233 */
234 /* Minimum size */
235 #define PART_ENCRYPTION_AES256_SIZE 42
236 struct part_encryption_aes256_s
237 {
238 part_header_t head;
239 uint16_t username_length;
240 char *username;
241 unsigned char iv[16];
242 /* <encrypted> */
243 unsigned char hash[20];
244 /* <payload /> */
245 /* </encrypted> */
246 };
247 typedef struct part_encryption_aes256_s part_encryption_aes256_t;
249 struct receive_list_entry_s
250 {
251 char *data;
252 int data_len;
253 int fd;
254 struct receive_list_entry_s *next;
255 };
256 typedef struct receive_list_entry_s receive_list_entry_t;
258 /*
259 * Private variables
260 */
261 static int network_config_ttl = 0;
262 static size_t network_config_packet_size = 1024;
263 static int network_config_forward = 0;
264 static int network_config_stats = 0;
266 static sockent_t *sending_sockets = NULL;
268 static receive_list_entry_t *receive_list_head = NULL;
269 static receive_list_entry_t *receive_list_tail = NULL;
270 static pthread_mutex_t receive_list_lock = PTHREAD_MUTEX_INITIALIZER;
271 static pthread_cond_t receive_list_cond = PTHREAD_COND_INITIALIZER;
272 static uint64_t receive_list_length = 0;
274 static sockent_t *listen_sockets = NULL;
275 static struct pollfd *listen_sockets_pollfd = NULL;
276 static size_t listen_sockets_num = 0;
278 /* The receive and dispatch threads will run as long as `listen_loop' is set to
279 * zero. */
280 static int listen_loop = 0;
281 static int receive_thread_running = 0;
282 static pthread_t receive_thread_id;
283 static int dispatch_thread_running = 0;
284 static pthread_t dispatch_thread_id;
286 /* Buffer in which to-be-sent network packets are constructed. */
287 static char *send_buffer;
288 static char *send_buffer_ptr;
289 static int send_buffer_fill;
290 static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
291 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
293 /* XXX: These counters are incremented from one place only. The spot in which
294 * the values are incremented is either only reachable by one thread (the
295 * dispatch thread, for example) or locked by some lock (send_buffer_lock for
296 * example). Only if neither is true, the stats_lock is acquired. The counters
297 * are always read without holding a lock in the hope that writing 8 bytes to
298 * memory is an atomic operation. */
299 static uint64_t stats_octets_rx = 0;
300 static uint64_t stats_octets_tx = 0;
301 static uint64_t stats_packets_rx = 0;
302 static uint64_t stats_packets_tx = 0;
303 static uint64_t stats_values_dispatched = 0;
304 static uint64_t stats_values_not_dispatched = 0;
305 static uint64_t stats_values_sent = 0;
306 static uint64_t stats_values_not_sent = 0;
307 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
309 /*
310 * Private functions
311 */
312 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
313 {
314 uint64_t time_sent = 0;
315 int status;
317 status = uc_meta_data_get_unsigned_int (vl,
318 "network:time_sent", &time_sent);
320 /* This is a value we already sent. Don't allow it to be received again in
321 * order to avoid looping. */
322 if ((status == 0) && (time_sent >= ((uint64_t) vl->time)))
323 return (false);
325 return (true);
326 } /* }}} _Bool check_receive_okay */
328 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
329 {
330 _Bool received = false;
331 int status;
333 if (network_config_forward != 0)
334 return (true);
336 if (vl->meta == NULL)
337 return (true);
339 status = meta_data_get_boolean (vl->meta, "network:received", &received);
340 if (status == -ENOENT)
341 return (true);
342 else if (status != 0)
343 {
344 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
345 "with status %i.", status);
346 return (true);
347 }
349 /* By default, only *send* value lists that were not *received* by the
350 * network plugin. */
351 return (!received);
352 } /* }}} _Bool check_send_okay */
354 static int network_dispatch_values (value_list_t *vl, /* {{{ */
355 const char *username)
356 {
357 int status;
359 if ((vl->time <= 0)
360 || (strlen (vl->host) <= 0)
361 || (strlen (vl->plugin) <= 0)
362 || (strlen (vl->type) <= 0))
363 return (-EINVAL);
365 if (!check_receive_okay (vl))
366 {
367 #if COLLECT_DEBUG
368 char name[6*DATA_MAX_NAME_LEN];
369 FORMAT_VL (name, sizeof (name), vl);
370 name[sizeof (name) - 1] = 0;
371 DEBUG ("network plugin: network_dispatch_values: "
372 "NOT dispatching %s.", name);
373 #endif
374 stats_values_not_dispatched++;
375 return (0);
376 }
378 assert (vl->meta == NULL);
380 vl->meta = meta_data_create ();
381 if (vl->meta == NULL)
382 {
383 ERROR ("network plugin: meta_data_create failed.");
384 return (-ENOMEM);
385 }
387 status = meta_data_add_boolean (vl->meta, "network:received", true);
388 if (status != 0)
389 {
390 ERROR ("network plugin: meta_data_add_boolean failed.");
391 meta_data_destroy (vl->meta);
392 vl->meta = NULL;
393 return (status);
394 }
396 if (username != NULL)
397 {
398 status = meta_data_add_string (vl->meta, "network:username", username);
399 if (status != 0)
400 {
401 ERROR ("network plugin: meta_data_add_string failed.");
402 meta_data_destroy (vl->meta);
403 vl->meta = NULL;
404 return (status);
405 }
406 }
408 plugin_dispatch_values (vl);
409 stats_values_dispatched++;
411 meta_data_destroy (vl->meta);
412 vl->meta = NULL;
414 return (0);
415 } /* }}} int network_dispatch_values */
417 #if HAVE_LIBGCRYPT
418 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
419 const void *iv, size_t iv_size, const char *username)
420 {
421 gcry_error_t err;
422 gcry_cipher_hd_t *cyper_ptr;
423 unsigned char password_hash[32];
425 if (se->type == SOCKENT_TYPE_CLIENT)
426 {
427 cyper_ptr = &se->data.client.cypher;
428 memcpy (password_hash, se->data.client.password_hash,
429 sizeof (password_hash));
430 }
431 else
432 {
433 char *secret;
435 cyper_ptr = &se->data.server.cypher;
437 if (username == NULL)
438 return (NULL);
440 secret = fbh_get (se->data.server.userdb, username);
441 if (secret == NULL)
442 return (NULL);
444 gcry_md_hash_buffer (GCRY_MD_SHA256,
445 password_hash,
446 secret, strlen (secret));
448 sfree (secret);
449 }
451 if (*cyper_ptr == NULL)
452 {
453 err = gcry_cipher_open (cyper_ptr,
454 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
455 if (err != 0)
456 {
457 ERROR ("network plugin: gcry_cipher_open returned: %s",
458 gcry_strerror (err));
459 *cyper_ptr = NULL;
460 return (NULL);
461 }
462 }
463 else
464 {
465 gcry_cipher_reset (*cyper_ptr);
466 }
467 assert (*cyper_ptr != NULL);
469 err = gcry_cipher_setkey (*cyper_ptr,
470 password_hash, sizeof (password_hash));
471 if (err != 0)
472 {
473 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
474 gcry_strerror (err));
475 gcry_cipher_close (*cyper_ptr);
476 *cyper_ptr = NULL;
477 return (NULL);
478 }
480 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
481 if (err != 0)
482 {
483 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
484 gcry_strerror (err));
485 gcry_cipher_close (*cyper_ptr);
486 *cyper_ptr = NULL;
487 return (NULL);
488 }
490 return (*cyper_ptr);
491 } /* }}} int network_get_aes256_cypher */
492 #endif /* HAVE_LIBGCRYPT */
494 static int write_part_values (char **ret_buffer, int *ret_buffer_len,
495 const data_set_t *ds, const value_list_t *vl)
496 {
497 char *packet_ptr;
498 int packet_len;
499 int num_values;
501 part_header_t pkg_ph;
502 uint16_t pkg_num_values;
503 uint8_t *pkg_values_types;
504 value_t *pkg_values;
506 int offset;
507 int i;
509 num_values = vl->values_len;
510 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
511 + (num_values * sizeof (uint8_t))
512 + (num_values * sizeof (value_t));
514 if (*ret_buffer_len < packet_len)
515 return (-1);
517 pkg_values_types = (uint8_t *) malloc (num_values * sizeof (uint8_t));
518 if (pkg_values_types == NULL)
519 {
520 ERROR ("network plugin: write_part_values: malloc failed.");
521 return (-1);
522 }
524 pkg_values = (value_t *) malloc (num_values * sizeof (value_t));
525 if (pkg_values == NULL)
526 {
527 free (pkg_values_types);
528 ERROR ("network plugin: write_part_values: malloc failed.");
529 return (-1);
530 }
532 pkg_ph.type = htons (TYPE_VALUES);
533 pkg_ph.length = htons (packet_len);
535 pkg_num_values = htons ((uint16_t) vl->values_len);
537 for (i = 0; i < num_values; i++)
538 {
539 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
540 switch (ds->ds[i].type)
541 {
542 case DS_TYPE_COUNTER:
543 pkg_values[i].counter = htonll (vl->values[i].counter);
544 break;
546 case DS_TYPE_GAUGE:
547 pkg_values[i].gauge = htond (vl->values[i].gauge);
548 break;
550 case DS_TYPE_DERIVE:
551 pkg_values[i].derive = htonll (vl->values[i].derive);
552 break;
554 case DS_TYPE_ABSOLUTE:
555 pkg_values[i].absolute = htonll (vl->values[i].absolute);
556 break;
558 default:
559 free (pkg_values_types);
560 free (pkg_values);
561 ERROR ("network plugin: write_part_values: "
562 "Unknown data source type: %i",
563 ds->ds[i].type);
564 return (-1);
565 } /* switch (ds->ds[i].type) */
566 } /* for (num_values) */
568 /*
569 * Use `memcpy' to write everything to the buffer, because the pointer
570 * may be unaligned and some architectures, such as SPARC, can't handle
571 * that.
572 */
573 packet_ptr = *ret_buffer;
574 offset = 0;
575 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
576 offset += sizeof (pkg_ph);
577 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
578 offset += sizeof (pkg_num_values);
579 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
580 offset += num_values * sizeof (uint8_t);
581 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
582 offset += num_values * sizeof (value_t);
584 assert (offset == packet_len);
586 *ret_buffer = packet_ptr + packet_len;
587 *ret_buffer_len -= packet_len;
589 free (pkg_values_types);
590 free (pkg_values);
592 return (0);
593 } /* int write_part_values */
595 static int write_part_number (char **ret_buffer, int *ret_buffer_len,
596 int type, uint64_t value)
597 {
598 char *packet_ptr;
599 int packet_len;
601 part_header_t pkg_head;
602 uint64_t pkg_value;
604 int offset;
606 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
608 if (*ret_buffer_len < packet_len)
609 return (-1);
611 pkg_head.type = htons (type);
612 pkg_head.length = htons (packet_len);
613 pkg_value = htonll (value);
615 packet_ptr = *ret_buffer;
616 offset = 0;
617 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
618 offset += sizeof (pkg_head);
619 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
620 offset += sizeof (pkg_value);
622 assert (offset == packet_len);
624 *ret_buffer = packet_ptr + packet_len;
625 *ret_buffer_len -= packet_len;
627 return (0);
628 } /* int write_part_number */
630 static int write_part_string (char **ret_buffer, int *ret_buffer_len,
631 int type, const char *str, int str_len)
632 {
633 char *buffer;
634 int buffer_len;
636 uint16_t pkg_type;
637 uint16_t pkg_length;
639 int offset;
641 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
642 if (*ret_buffer_len < buffer_len)
643 return (-1);
645 pkg_type = htons (type);
646 pkg_length = htons (buffer_len);
648 buffer = *ret_buffer;
649 offset = 0;
650 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
651 offset += sizeof (pkg_type);
652 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
653 offset += sizeof (pkg_length);
654 memcpy (buffer + offset, str, str_len);
655 offset += str_len;
656 memset (buffer + offset, '\0', 1);
657 offset += 1;
659 assert (offset == buffer_len);
661 *ret_buffer = buffer + buffer_len;
662 *ret_buffer_len -= buffer_len;
664 return (0);
665 } /* int write_part_string */
667 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
668 value_t **ret_values, int *ret_num_values)
669 {
670 char *buffer = *ret_buffer;
671 size_t buffer_len = *ret_buffer_len;
673 uint16_t tmp16;
674 size_t exp_size;
675 int i;
677 uint16_t pkg_length;
678 uint16_t pkg_type;
679 uint16_t pkg_numval;
681 uint8_t *pkg_types;
682 value_t *pkg_values;
684 if (buffer_len < 15)
685 {
686 NOTICE ("network plugin: packet is too short: "
687 "buffer_len = %zu", buffer_len);
688 return (-1);
689 }
691 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
692 buffer += sizeof (tmp16);
693 pkg_type = ntohs (tmp16);
695 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
696 buffer += sizeof (tmp16);
697 pkg_length = ntohs (tmp16);
699 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
700 buffer += sizeof (tmp16);
701 pkg_numval = ntohs (tmp16);
703 assert (pkg_type == TYPE_VALUES);
705 exp_size = 3 * sizeof (uint16_t)
706 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
707 if ((buffer_len < 0) || (buffer_len < exp_size))
708 {
709 WARNING ("network plugin: parse_part_values: "
710 "Packet too short: "
711 "Chunk of size %zu expected, "
712 "but buffer has only %zu bytes left.",
713 exp_size, buffer_len);
714 return (-1);
715 }
717 if (pkg_length != exp_size)
718 {
719 WARNING ("network plugin: parse_part_values: "
720 "Length and number of values "
721 "in the packet don't match.");
722 return (-1);
723 }
725 pkg_types = (uint8_t *) malloc (pkg_numval * sizeof (uint8_t));
726 pkg_values = (value_t *) malloc (pkg_numval * sizeof (value_t));
727 if ((pkg_types == NULL) || (pkg_values == NULL))
728 {
729 sfree (pkg_types);
730 sfree (pkg_values);
731 ERROR ("network plugin: parse_part_values: malloc failed.");
732 return (-1);
733 }
735 memcpy ((void *) pkg_types, (void *) buffer, pkg_numval * sizeof (uint8_t));
736 buffer += pkg_numval * sizeof (uint8_t);
737 memcpy ((void *) pkg_values, (void *) buffer, pkg_numval * sizeof (value_t));
738 buffer += pkg_numval * sizeof (value_t);
740 for (i = 0; i < pkg_numval; i++)
741 {
742 switch (pkg_types[i])
743 {
744 case DS_TYPE_COUNTER:
745 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
746 break;
748 case DS_TYPE_GAUGE:
749 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
750 break;
752 case DS_TYPE_DERIVE:
753 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
754 break;
756 case DS_TYPE_ABSOLUTE:
757 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
758 break;
760 default:
761 NOTICE ("network plugin: parse_part_values: "
762 "Don't know how to handle data source type %"PRIu8,
763 pkg_types[i]);
764 sfree (pkg_types);
765 sfree (pkg_values);
766 return (-1);
767 } /* switch (pkg_types[i]) */
768 }
770 *ret_buffer = buffer;
771 *ret_buffer_len = buffer_len - pkg_length;
772 *ret_num_values = pkg_numval;
773 *ret_values = pkg_values;
775 sfree (pkg_types);
777 return (0);
778 } /* int parse_part_values */
780 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
781 uint64_t *value)
782 {
783 char *buffer = *ret_buffer;
784 size_t buffer_len = *ret_buffer_len;
786 uint16_t tmp16;
787 uint64_t tmp64;
788 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
790 uint16_t pkg_length;
791 uint16_t pkg_type;
793 if ((buffer_len < 0) || ((size_t) buffer_len < exp_size))
794 {
795 WARNING ("network plugin: parse_part_number: "
796 "Packet too short: "
797 "Chunk of size %zu expected, "
798 "but buffer has only %zu bytes left.",
799 exp_size, buffer_len);
800 return (-1);
801 }
803 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
804 buffer += sizeof (tmp16);
805 pkg_type = ntohs (tmp16);
807 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
808 buffer += sizeof (tmp16);
809 pkg_length = ntohs (tmp16);
811 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
812 buffer += sizeof (tmp64);
813 *value = ntohll (tmp64);
815 *ret_buffer = buffer;
816 *ret_buffer_len = buffer_len - pkg_length;
818 return (0);
819 } /* int parse_part_number */
821 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
822 char *output, int output_len)
823 {
824 char *buffer = *ret_buffer;
825 size_t buffer_len = *ret_buffer_len;
827 uint16_t tmp16;
828 size_t header_size = 2 * sizeof (uint16_t);
830 uint16_t pkg_length;
831 uint16_t pkg_type;
833 if ((buffer_len < 0) || (buffer_len < header_size))
834 {
835 WARNING ("network plugin: parse_part_string: "
836 "Packet too short: "
837 "Chunk of at least size %zu expected, "
838 "but buffer has only %zu bytes left.",
839 header_size, buffer_len);
840 return (-1);
841 }
843 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
844 buffer += sizeof (tmp16);
845 pkg_type = ntohs (tmp16);
847 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
848 buffer += sizeof (tmp16);
849 pkg_length = ntohs (tmp16);
851 /* Check that packet fits in the input buffer */
852 if (pkg_length > buffer_len)
853 {
854 WARNING ("network plugin: parse_part_string: "
855 "Packet too big: "
856 "Chunk of size %"PRIu16" received, "
857 "but buffer has only %zu bytes left.",
858 pkg_length, buffer_len);
859 return (-1);
860 }
862 /* Check that pkg_length is in the valid range */
863 if (pkg_length <= header_size)
864 {
865 WARNING ("network plugin: parse_part_string: "
866 "Packet too short: "
867 "Header claims this packet is only %hu "
868 "bytes long.", pkg_length);
869 return (-1);
870 }
872 /* Check that the package data fits into the output buffer.
873 * The previous if-statement ensures that:
874 * `pkg_length > header_size' */
875 if ((output_len < 0)
876 || ((size_t) output_len < ((size_t) pkg_length - header_size)))
877 {
878 WARNING ("network plugin: parse_part_string: "
879 "Output buffer too small.");
880 return (-1);
881 }
883 /* All sanity checks successfull, let's copy the data over */
884 output_len = pkg_length - header_size;
885 memcpy ((void *) output, (void *) buffer, output_len);
886 buffer += output_len;
888 /* For some very weird reason '\0' doesn't do the trick on SPARC in
889 * this statement. */
890 if (output[output_len - 1] != 0)
891 {
892 WARNING ("network plugin: parse_part_string: "
893 "Received string does not end "
894 "with a NULL-byte.");
895 return (-1);
896 }
898 *ret_buffer = buffer;
899 *ret_buffer_len = buffer_len - pkg_length;
901 return (0);
902 } /* int parse_part_string */
904 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
905 * parse_packet and vice versa. */
906 #define PP_SIGNED 0x01
907 #define PP_ENCRYPTED 0x02
908 static int parse_packet (sockent_t *se,
909 void *buffer, size_t buffer_size, int flags,
910 const char *username);
912 #define BUFFER_READ(p,s) do { \
913 memcpy ((p), buffer + buffer_offset, (s)); \
914 buffer_offset += (s); \
915 } while (0)
917 #if HAVE_LIBGCRYPT
918 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
919 void **ret_buffer, size_t *ret_buffer_len, int flags)
920 {
921 static c_complain_t complain_no_users = C_COMPLAIN_INIT_STATIC;
923 char *buffer;
924 size_t buffer_len;
925 size_t buffer_offset;
927 size_t username_len;
928 char *secret;
930 part_signature_sha256_t pss;
931 uint16_t pss_head_length;
932 char hash[sizeof (pss.hash)];
934 gcry_md_hd_t hd;
935 gcry_error_t err;
936 unsigned char *hash_ptr;
938 buffer = *ret_buffer;
939 buffer_len = *ret_buffer_len;
940 buffer_offset = 0;
942 if (se->data.server.userdb == NULL)
943 {
944 c_complain (LOG_NOTICE, &complain_no_users,
945 "network plugin: Received signed network packet but can't verify it "
946 "because no user DB has been configured. Will accept it.");
947 return (0);
948 }
950 /* Check if the buffer has enough data for this structure. */
951 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
952 return (-ENOMEM);
954 /* Read type and length header */
955 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
956 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
957 pss_head_length = ntohs (pss.head.length);
959 /* Check if the `pss_head_length' is within bounds. */
960 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
961 || (pss_head_length > buffer_len))
962 {
963 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
964 return (-1);
965 }
967 /* Copy the hash. */
968 BUFFER_READ (pss.hash, sizeof (pss.hash));
970 /* Calculate username length (without null byte) and allocate memory */
971 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
972 pss.username = malloc (username_len + 1);
973 if (pss.username == NULL)
974 return (-ENOMEM);
976 /* Read the username */
977 BUFFER_READ (pss.username, username_len);
978 pss.username[username_len] = 0;
980 assert (buffer_offset == pss_head_length);
982 /* Query the password */
983 secret = fbh_get (se->data.server.userdb, pss.username);
984 if (secret == NULL)
985 {
986 ERROR ("network plugin: Unknown user: %s", pss.username);
987 sfree (pss.username);
988 return (-ENOENT);
989 }
991 /* Create a hash device and check the HMAC */
992 hd = NULL;
993 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
994 if (err != 0)
995 {
996 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
997 gcry_strerror (err));
998 sfree (secret);
999 sfree (pss.username);
1000 return (-1);
1001 }
1003 err = gcry_md_setkey (hd, secret, strlen (secret));
1004 if (err != 0)
1005 {
1006 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
1007 gcry_md_close (hd);
1008 sfree (secret);
1009 sfree (pss.username);
1010 return (-1);
1011 }
1013 gcry_md_write (hd,
1014 buffer + PART_SIGNATURE_SHA256_SIZE,
1015 buffer_len - PART_SIGNATURE_SHA256_SIZE);
1016 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
1017 if (hash_ptr == NULL)
1018 {
1019 ERROR ("network plugin: gcry_md_read failed.");
1020 gcry_md_close (hd);
1021 sfree (secret);
1022 sfree (pss.username);
1023 return (-1);
1024 }
1025 memcpy (hash, hash_ptr, sizeof (hash));
1027 /* Clean up */
1028 gcry_md_close (hd);
1029 hd = NULL;
1031 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1032 {
1033 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1034 "Hash mismatch.");
1035 }
1036 else
1037 {
1038 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1039 flags | PP_SIGNED, pss.username);
1040 }
1042 sfree (secret);
1043 sfree (pss.username);
1045 *ret_buffer = buffer + buffer_len;
1046 *ret_buffer_len = 0;
1048 return (0);
1049 } /* }}} int parse_part_sign_sha256 */
1050 /* #endif HAVE_LIBGCRYPT */
1052 #else /* if !HAVE_LIBGCRYPT */
1053 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1054 void **ret_buffer, size_t *ret_buffer_size, int flags)
1055 {
1056 static int warning_has_been_printed = 0;
1058 char *buffer;
1059 size_t buffer_size;
1060 size_t buffer_offset;
1061 uint16_t part_len;
1063 part_signature_sha256_t pss;
1065 buffer = *ret_buffer;
1066 buffer_size = *ret_buffer_size;
1067 buffer_offset = 0;
1069 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1070 return (-ENOMEM);
1072 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1073 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1074 part_len = ntohs (pss.head.length);
1076 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1077 || (part_len > buffer_size))
1078 return (-EINVAL);
1080 if (warning_has_been_printed == 0)
1081 {
1082 WARNING ("network plugin: Received signed packet, but the network "
1083 "plugin was not linked with libgcrypt, so I cannot "
1084 "verify the signature. The packet will be accepted.");
1085 warning_has_been_printed = 1;
1086 }
1088 parse_packet (se, buffer + part_len, buffer_size - part_len, flags,
1089 /* username = */ NULL);
1091 *ret_buffer = buffer + buffer_size;
1092 *ret_buffer_size = 0;
1094 return (0);
1095 } /* }}} int parse_part_sign_sha256 */
1096 #endif /* !HAVE_LIBGCRYPT */
1098 #if HAVE_LIBGCRYPT
1099 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1100 void **ret_buffer, size_t *ret_buffer_len,
1101 int flags)
1102 {
1103 char *buffer = *ret_buffer;
1104 size_t buffer_len = *ret_buffer_len;
1105 size_t payload_len;
1106 size_t part_size;
1107 size_t buffer_offset;
1108 uint16_t username_len;
1109 part_encryption_aes256_t pea;
1110 unsigned char hash[sizeof (pea.hash)];
1112 gcry_cipher_hd_t cypher;
1113 gcry_error_t err;
1115 /* Make sure at least the header if available. */
1116 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1117 {
1118 NOTICE ("network plugin: parse_part_encr_aes256: "
1119 "Discarding short packet.");
1120 return (-1);
1121 }
1123 buffer_offset = 0;
1125 /* Copy the unencrypted information into `pea'. */
1126 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1127 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1129 /* Check the `part size'. */
1130 part_size = ntohs (pea.head.length);
1131 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1132 || (part_size > buffer_len))
1133 {
1134 NOTICE ("network plugin: parse_part_encr_aes256: "
1135 "Discarding part with invalid size.");
1136 return (-1);
1137 }
1139 /* Read the username */
1140 BUFFER_READ (&username_len, sizeof (username_len));
1141 username_len = ntohs (username_len);
1143 if ((username_len <= 0)
1144 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1145 {
1146 NOTICE ("network plugin: parse_part_encr_aes256: "
1147 "Discarding part with invalid username length.");
1148 return (-1);
1149 }
1151 assert (username_len > 0);
1152 pea.username = malloc (username_len + 1);
1153 if (pea.username == NULL)
1154 return (-ENOMEM);
1155 BUFFER_READ (pea.username, username_len);
1156 pea.username[username_len] = 0;
1158 /* Last but not least, the initialization vector */
1159 BUFFER_READ (pea.iv, sizeof (pea.iv));
1161 /* Make sure we are at the right position */
1162 assert (buffer_offset == (username_len +
1163 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1165 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1166 pea.username);
1167 if (cypher == NULL)
1168 {
1169 sfree (pea.username);
1170 return (-1);
1171 }
1173 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1174 assert (payload_len > 0);
1176 /* Decrypt the packet in-place */
1177 err = gcry_cipher_decrypt (cypher,
1178 buffer + buffer_offset,
1179 part_size - buffer_offset,
1180 /* in = */ NULL, /* in len = */ 0);
1181 if (err != 0)
1182 {
1183 sfree (pea.username);
1184 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1185 gcry_strerror (err));
1186 return (-1);
1187 }
1189 /* Read the hash */
1190 BUFFER_READ (pea.hash, sizeof (pea.hash));
1192 /* Make sure we're at the right position - again */
1193 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1194 assert (buffer_offset == (part_size - payload_len));
1196 /* Check hash sum */
1197 memset (hash, 0, sizeof (hash));
1198 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1199 buffer + buffer_offset, payload_len);
1200 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1201 {
1202 sfree (pea.username);
1203 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1204 return (-1);
1205 }
1207 parse_packet (se, buffer + buffer_offset, payload_len,
1208 flags | PP_ENCRYPTED, pea.username);
1210 /* XXX: Free pea.username?!? */
1212 /* Update return values */
1213 *ret_buffer = buffer + part_size;
1214 *ret_buffer_len = buffer_len - part_size;
1216 sfree (pea.username);
1218 return (0);
1219 } /* }}} int parse_part_encr_aes256 */
1220 /* #endif HAVE_LIBGCRYPT */
1222 #else /* if !HAVE_LIBGCRYPT */
1223 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1224 void **ret_buffer, size_t *ret_buffer_size, int flags)
1225 {
1226 static int warning_has_been_printed = 0;
1228 char *buffer;
1229 size_t buffer_size;
1230 size_t buffer_offset;
1232 part_header_t ph;
1233 size_t ph_length;
1235 buffer = *ret_buffer;
1236 buffer_size = *ret_buffer_size;
1237 buffer_offset = 0;
1239 /* parse_packet assures this minimum size. */
1240 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1242 BUFFER_READ (&ph.type, sizeof (ph.type));
1243 BUFFER_READ (&ph.length, sizeof (ph.length));
1244 ph_length = ntohs (ph.length);
1246 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1247 || (ph_length > buffer_size))
1248 {
1249 ERROR ("network plugin: AES-256 encrypted part "
1250 "with invalid length received.");
1251 return (-1);
1252 }
1254 if (warning_has_been_printed == 0)
1255 {
1256 WARNING ("network plugin: Received encrypted packet, but the network "
1257 "plugin was not linked with libgcrypt, so I cannot "
1258 "decrypt it. The part will be discarded.");
1259 warning_has_been_printed = 1;
1260 }
1262 *ret_buffer += ph_length;
1263 *ret_buffer_size -= ph_length;
1265 return (0);
1266 } /* }}} int parse_part_encr_aes256 */
1267 #endif /* !HAVE_LIBGCRYPT */
1269 #undef BUFFER_READ
1271 static int parse_packet (sockent_t *se, /* {{{ */
1272 void *buffer, size_t buffer_size, int flags,
1273 const char *username)
1274 {
1275 int status;
1277 value_list_t vl = VALUE_LIST_INIT;
1278 notification_t n;
1280 #if HAVE_LIBGCRYPT
1281 int packet_was_signed = (flags & PP_SIGNED);
1282 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1283 int printed_ignore_warning = 0;
1284 #endif /* HAVE_LIBGCRYPT */
1287 memset (&vl, '\0', sizeof (vl));
1288 memset (&n, '\0', sizeof (n));
1289 status = 0;
1291 while ((status == 0) && (0 < buffer_size)
1292 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1293 {
1294 uint16_t pkg_length;
1295 uint16_t pkg_type;
1297 memcpy ((void *) &pkg_type,
1298 (void *) buffer,
1299 sizeof (pkg_type));
1300 memcpy ((void *) &pkg_length,
1301 (void *) (buffer + sizeof (pkg_type)),
1302 sizeof (pkg_length));
1304 pkg_length = ntohs (pkg_length);
1305 pkg_type = ntohs (pkg_type);
1307 if (pkg_length > buffer_size)
1308 break;
1309 /* Ensure that this loop terminates eventually */
1310 if (pkg_length < (2 * sizeof (uint16_t)))
1311 break;
1313 if (pkg_type == TYPE_ENCR_AES256)
1314 {
1315 status = parse_part_encr_aes256 (se,
1316 &buffer, &buffer_size, flags);
1317 if (status != 0)
1318 {
1319 ERROR ("network plugin: Decrypting AES256 "
1320 "part failed "
1321 "with status %i.", status);
1322 break;
1323 }
1324 }
1325 #if HAVE_LIBGCRYPT
1326 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1327 && (packet_was_encrypted == 0))
1328 {
1329 if (printed_ignore_warning == 0)
1330 {
1331 INFO ("network plugin: Unencrypted packet or "
1332 "part has been ignored.");
1333 printed_ignore_warning = 1;
1334 }
1335 buffer = ((char *) buffer) + pkg_length;
1336 continue;
1337 }
1338 #endif /* HAVE_LIBGCRYPT */
1339 else if (pkg_type == TYPE_SIGN_SHA256)
1340 {
1341 status = parse_part_sign_sha256 (se,
1342 &buffer, &buffer_size, flags);
1343 if (status != 0)
1344 {
1345 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1346 "signature failed "
1347 "with status %i.", status);
1348 break;
1349 }
1350 }
1351 #if HAVE_LIBGCRYPT
1352 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1353 && (packet_was_encrypted == 0)
1354 && (packet_was_signed == 0))
1355 {
1356 if (printed_ignore_warning == 0)
1357 {
1358 INFO ("network plugin: Unsigned packet or "
1359 "part has been ignored.");
1360 printed_ignore_warning = 1;
1361 }
1362 buffer = ((char *) buffer) + pkg_length;
1363 continue;
1364 }
1365 #endif /* HAVE_LIBGCRYPT */
1366 else if (pkg_type == TYPE_VALUES)
1367 {
1368 status = parse_part_values (&buffer, &buffer_size,
1369 &vl.values, &vl.values_len);
1370 if (status != 0)
1371 break;
1373 network_dispatch_values (&vl, username);
1375 sfree (vl.values);
1376 }
1377 else if (pkg_type == TYPE_TIME)
1378 {
1379 uint64_t tmp = 0;
1380 status = parse_part_number (&buffer, &buffer_size,
1381 &tmp);
1382 if (status == 0)
1383 {
1384 vl.time = (time_t) tmp;
1385 n.time = (time_t) tmp;
1386 }
1387 }
1388 else if (pkg_type == TYPE_INTERVAL)
1389 {
1390 uint64_t tmp = 0;
1391 status = parse_part_number (&buffer, &buffer_size,
1392 &tmp);
1393 if (status == 0)
1394 vl.interval = (int) tmp;
1395 }
1396 else if (pkg_type == TYPE_HOST)
1397 {
1398 status = parse_part_string (&buffer, &buffer_size,
1399 vl.host, sizeof (vl.host));
1400 if (status == 0)
1401 sstrncpy (n.host, vl.host, sizeof (n.host));
1402 }
1403 else if (pkg_type == TYPE_PLUGIN)
1404 {
1405 status = parse_part_string (&buffer, &buffer_size,
1406 vl.plugin, sizeof (vl.plugin));
1407 if (status == 0)
1408 sstrncpy (n.plugin, vl.plugin,
1409 sizeof (n.plugin));
1410 }
1411 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1412 {
1413 status = parse_part_string (&buffer, &buffer_size,
1414 vl.plugin_instance,
1415 sizeof (vl.plugin_instance));
1416 if (status == 0)
1417 sstrncpy (n.plugin_instance,
1418 vl.plugin_instance,
1419 sizeof (n.plugin_instance));
1420 }
1421 else if (pkg_type == TYPE_TYPE)
1422 {
1423 status = parse_part_string (&buffer, &buffer_size,
1424 vl.type, sizeof (vl.type));
1425 if (status == 0)
1426 sstrncpy (n.type, vl.type, sizeof (n.type));
1427 }
1428 else if (pkg_type == TYPE_TYPE_INSTANCE)
1429 {
1430 status = parse_part_string (&buffer, &buffer_size,
1431 vl.type_instance,
1432 sizeof (vl.type_instance));
1433 if (status == 0)
1434 sstrncpy (n.type_instance, vl.type_instance,
1435 sizeof (n.type_instance));
1436 }
1437 else if (pkg_type == TYPE_MESSAGE)
1438 {
1439 status = parse_part_string (&buffer, &buffer_size,
1440 n.message, sizeof (n.message));
1442 if (status != 0)
1443 {
1444 /* do nothing */
1445 }
1446 else if ((n.severity != NOTIF_FAILURE)
1447 && (n.severity != NOTIF_WARNING)
1448 && (n.severity != NOTIF_OKAY))
1449 {
1450 INFO ("network plugin: "
1451 "Ignoring notification with "
1452 "unknown severity %i.",
1453 n.severity);
1454 }
1455 else if (n.time <= 0)
1456 {
1457 INFO ("network plugin: "
1458 "Ignoring notification with "
1459 "time == 0.");
1460 }
1461 else if (strlen (n.message) <= 0)
1462 {
1463 INFO ("network plugin: "
1464 "Ignoring notification with "
1465 "an empty message.");
1466 }
1467 else
1468 {
1469 plugin_dispatch_notification (&n);
1470 }
1471 }
1472 else if (pkg_type == TYPE_SEVERITY)
1473 {
1474 uint64_t tmp = 0;
1475 status = parse_part_number (&buffer, &buffer_size,
1476 &tmp);
1477 if (status == 0)
1478 n.severity = (int) tmp;
1479 }
1480 else
1481 {
1482 DEBUG ("network plugin: parse_packet: Unknown part"
1483 " type: 0x%04hx", pkg_type);
1484 buffer = ((char *) buffer) + pkg_length;
1485 }
1486 } /* while (buffer_size > sizeof (part_header_t)) */
1488 if (status == 0 && buffer_size > 0)
1489 WARNING ("network plugin: parse_packet: Received truncated "
1490 "packet, try increasing `MaxPacketSize'");
1492 return (status);
1493 } /* }}} int parse_packet */
1495 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1496 {
1497 if (sec->fd >= 0)
1498 {
1499 close (sec->fd);
1500 sec->fd = -1;
1501 }
1502 sfree (sec->addr);
1503 #if HAVE_LIBGCRYPT
1504 sfree (sec->username);
1505 sfree (sec->password);
1506 if (sec->cypher != NULL)
1507 gcry_cipher_close (sec->cypher);
1508 #endif
1509 } /* }}} void free_sockent_client */
1511 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1512 {
1513 size_t i;
1515 for (i = 0; i < ses->fd_num; i++)
1516 {
1517 if (ses->fd[i] >= 0)
1518 {
1519 close (ses->fd[i]);
1520 ses->fd[i] = -1;
1521 }
1522 }
1524 sfree (ses->fd);
1525 #if HAVE_LIBGCRYPT
1526 sfree (ses->auth_file);
1527 fbh_destroy (ses->userdb);
1528 if (ses->cypher != NULL)
1529 gcry_cipher_close (ses->cypher);
1530 #endif
1531 } /* }}} void free_sockent_server */
1533 static void sockent_destroy (sockent_t *se) /* {{{ */
1534 {
1535 sockent_t *next;
1537 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1539 while (se != NULL)
1540 {
1541 next = se->next;
1543 sfree (se->node);
1544 sfree (se->service);
1546 if (se->type == SOCKENT_TYPE_CLIENT)
1547 free_sockent_client (&se->data.client);
1548 else
1549 free_sockent_server (&se->data.server);
1551 sfree (se);
1552 se = next;
1553 }
1554 } /* }}} void sockent_destroy */
1556 /*
1557 * int network_set_ttl
1558 *
1559 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1560 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1561 *
1562 * The `struct addrinfo' is used to destinguish between unicast and multicast
1563 * sockets.
1564 */
1565 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1566 {
1567 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1568 network_config_ttl);
1570 assert (se->type == SOCKENT_TYPE_CLIENT);
1572 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1573 return (-1);
1575 if (ai->ai_family == AF_INET)
1576 {
1577 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1578 int optname;
1580 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1581 optname = IP_MULTICAST_TTL;
1582 else
1583 optname = IP_TTL;
1585 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1586 &network_config_ttl,
1587 sizeof (network_config_ttl)) != 0)
1588 {
1589 char errbuf[1024];
1590 ERROR ("setsockopt: %s",
1591 sstrerror (errno, errbuf, sizeof (errbuf)));
1592 return (-1);
1593 }
1594 }
1595 else if (ai->ai_family == AF_INET6)
1596 {
1597 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1598 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1599 int optname;
1601 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1602 optname = IPV6_MULTICAST_HOPS;
1603 else
1604 optname = IPV6_UNICAST_HOPS;
1606 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1607 &network_config_ttl,
1608 sizeof (network_config_ttl)) != 0)
1609 {
1610 char errbuf[1024];
1611 ERROR ("setsockopt: %s",
1612 sstrerror (errno, errbuf,
1613 sizeof (errbuf)));
1614 return (-1);
1615 }
1616 }
1618 return (0);
1619 } /* int network_set_ttl */
1621 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1622 {
1623 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1624 se->interface);
1626 assert (se->type == SOCKENT_TYPE_CLIENT);
1628 if (ai->ai_family == AF_INET)
1629 {
1630 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1632 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1633 {
1634 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1635 /* If possible, use the "ip_mreqn" structure which has
1636 * an "interface index" member. Using the interface
1637 * index is preferred here, because of its similarity
1638 * to the way IPv6 handles this. Unfortunately, it
1639 * appears not to be portable. */
1640 struct ip_mreqn mreq;
1642 memset (&mreq, 0, sizeof (mreq));
1643 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1644 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1645 mreq.imr_ifindex = se->interface;
1646 #else
1647 struct ip_mreq mreq;
1649 memset (&mreq, 0, sizeof (mreq));
1650 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1651 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1652 #endif
1654 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1655 &mreq, sizeof (mreq)) != 0)
1656 {
1657 char errbuf[1024];
1658 ERROR ("setsockopt: %s",
1659 sstrerror (errno, errbuf, sizeof (errbuf)));
1660 return (-1);
1661 }
1663 return (0);
1664 }
1665 }
1666 else if (ai->ai_family == AF_INET6)
1667 {
1668 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1670 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1671 {
1672 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1673 &se->interface,
1674 sizeof (se->interface)) != 0)
1675 {
1676 char errbuf[1024];
1677 ERROR ("setsockopt: %s",
1678 sstrerror (errno, errbuf,
1679 sizeof (errbuf)));
1680 return (-1);
1681 }
1683 return (0);
1684 }
1685 }
1687 /* else: Not a multicast interface. */
1688 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1689 if (se->interface != 0)
1690 {
1691 char interface_name[IFNAMSIZ];
1693 if (if_indextoname (se->interface, interface_name) == NULL)
1694 return (-1);
1696 DEBUG ("network plugin: Binding socket to interface %s", interface_name);
1698 if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
1699 interface_name,
1700 sizeof(interface_name)) == -1 )
1701 {
1702 char errbuf[1024];
1703 ERROR ("setsockopt: %s",
1704 sstrerror (errno, errbuf, sizeof (errbuf)));
1705 return (-1);
1706 }
1707 }
1708 /* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1710 #else
1711 WARNING ("network plugin: Cannot set the interface on a unicast "
1712 "socket because "
1713 # if !defined(SO_BINDTODEVICE)
1714 "the the \"SO_BINDTODEVICE\" socket option "
1715 # else
1716 "the \"if_indextoname\" function "
1717 # endif
1718 "is not available on your system.");
1719 #endif
1721 return (0);
1722 } /* }}} network_set_interface */
1724 static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
1725 {
1726 int loop = 0;
1727 int yes = 1;
1729 /* allow multiple sockets to use the same PORT number */
1730 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1731 &yes, sizeof(yes)) == -1) {
1732 char errbuf[1024];
1733 ERROR ("setsockopt: %s",
1734 sstrerror (errno, errbuf, sizeof (errbuf)));
1735 return (-1);
1736 }
1738 DEBUG ("fd = %i; calling `bind'", fd);
1740 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1741 {
1742 char errbuf[1024];
1743 ERROR ("bind: %s",
1744 sstrerror (errno, errbuf, sizeof (errbuf)));
1745 return (-1);
1746 }
1748 if (ai->ai_family == AF_INET)
1749 {
1750 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1751 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1752 {
1753 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1754 struct ip_mreqn mreq;
1755 #else
1756 struct ip_mreq mreq;
1757 #endif
1759 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1761 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1762 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1763 /* Set the interface using the interface index if
1764 * possible (available). Unfortunately, the struct
1765 * ip_mreqn is not portable. */
1766 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1767 mreq.imr_ifindex = interface_idx;
1768 #else
1769 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1770 #endif
1772 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1773 &loop, sizeof (loop)) == -1)
1774 {
1775 char errbuf[1024];
1776 ERROR ("setsockopt: %s",
1777 sstrerror (errno, errbuf,
1778 sizeof (errbuf)));
1779 return (-1);
1780 }
1782 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1783 &mreq, sizeof (mreq)) == -1)
1784 {
1785 char errbuf[1024];
1786 ERROR ("setsockopt: %s",
1787 sstrerror (errno, errbuf,
1788 sizeof (errbuf)));
1789 return (-1);
1790 }
1792 return (0);
1793 }
1794 }
1795 else if (ai->ai_family == AF_INET6)
1796 {
1797 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1798 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1799 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1800 {
1801 struct ipv6_mreq mreq;
1803 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1805 memcpy (&mreq.ipv6mr_multiaddr,
1806 &addr->sin6_addr,
1807 sizeof (addr->sin6_addr));
1809 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1810 * ipv6mr_interface may be set to zeroes to
1811 * choose the default multicast interface or to
1812 * the index of a particular multicast-capable
1813 * interface if the host is multihomed.
1814 * Membership is associ-associated with a
1815 * single interface; programs running on
1816 * multihomed hosts may need to join the same
1817 * group on more than one interface.*/
1818 mreq.ipv6mr_interface = interface_idx;
1820 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1821 &loop, sizeof (loop)) == -1)
1822 {
1823 char errbuf[1024];
1824 ERROR ("setsockopt: %s",
1825 sstrerror (errno, errbuf,
1826 sizeof (errbuf)));
1827 return (-1);
1828 }
1830 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1831 &mreq, sizeof (mreq)) == -1)
1832 {
1833 char errbuf[1024];
1834 ERROR ("setsockopt: %s",
1835 sstrerror (errno, errbuf,
1836 sizeof (errbuf)));
1837 return (-1);
1838 }
1840 return (0);
1841 }
1842 }
1844 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1845 /* if a specific interface was set, bind the socket to it. But to avoid
1846 * possible problems with multicast routing, only do that for non-multicast
1847 * addresses */
1848 if (interface_idx != 0)
1849 {
1850 char interface_name[IFNAMSIZ];
1852 if (if_indextoname (interface_idx, interface_name) == NULL)
1853 return (-1);
1855 DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
1857 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
1858 interface_name,
1859 sizeof(interface_name)) == -1 )
1860 {
1861 char errbuf[1024];
1862 ERROR ("setsockopt: %s",
1863 sstrerror (errno, errbuf, sizeof (errbuf)));
1864 return (-1);
1865 }
1866 }
1867 #endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1869 return (0);
1870 } /* int network_bind_socket */
1872 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
1873 * or `SOCKENT_TYPE_SERVER' */
1874 static int sockent_init (sockent_t *se, int type) /* {{{ */
1875 {
1876 if (se == NULL)
1877 return (-1);
1879 memset (se, 0, sizeof (*se));
1881 se->type = SOCKENT_TYPE_CLIENT;
1882 se->node = NULL;
1883 se->service = NULL;
1884 se->interface = 0;
1885 se->next = NULL;
1887 if (type == SOCKENT_TYPE_SERVER)
1888 {
1889 se->type = SOCKENT_TYPE_SERVER;
1890 se->data.server.fd = NULL;
1891 #if HAVE_LIBGCRYPT
1892 se->data.server.security_level = SECURITY_LEVEL_NONE;
1893 se->data.server.auth_file = NULL;
1894 se->data.server.userdb = NULL;
1895 se->data.server.cypher = NULL;
1896 #endif
1897 }
1898 else
1899 {
1900 se->data.client.fd = -1;
1901 se->data.client.addr = NULL;
1902 #if HAVE_LIBGCRYPT
1903 se->data.client.security_level = SECURITY_LEVEL_NONE;
1904 se->data.client.username = NULL;
1905 se->data.client.password = NULL;
1906 se->data.client.cypher = NULL;
1907 #endif
1908 }
1910 return (0);
1911 } /* }}} int sockent_init */
1913 /* Open the file descriptors for a initialized sockent structure. */
1914 static int sockent_open (sockent_t *se) /* {{{ */
1915 {
1916 struct addrinfo ai_hints;
1917 struct addrinfo *ai_list, *ai_ptr;
1918 int ai_return;
1920 const char *node;
1921 const char *service;
1923 if (se == NULL)
1924 return (-1);
1926 /* Set up the security structures. */
1927 #if HAVE_LIBGCRYPT /* {{{ */
1928 if (se->type == SOCKENT_TYPE_CLIENT)
1929 {
1930 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
1931 {
1932 if ((se->data.client.username == NULL)
1933 || (se->data.client.password == NULL))
1934 {
1935 ERROR ("network plugin: Client socket with "
1936 "security requested, but no "
1937 "credentials are configured.");
1938 return (-1);
1939 }
1940 gcry_md_hash_buffer (GCRY_MD_SHA256,
1941 se->data.client.password_hash,
1942 se->data.client.password,
1943 strlen (se->data.client.password));
1944 }
1945 }
1946 else /* (se->type == SOCKENT_TYPE_SERVER) */
1947 {
1948 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
1949 {
1950 if (se->data.server.auth_file == NULL)
1951 {
1952 ERROR ("network plugin: Server socket with "
1953 "security requested, but no "
1954 "password file is configured.");
1955 return (-1);
1956 }
1957 }
1958 if (se->data.server.auth_file != NULL)
1959 {
1960 se->data.server.userdb = fbh_create (se->data.server.auth_file);
1961 if (se->data.server.userdb == NULL)
1962 {
1963 ERROR ("network plugin: Reading password file "
1964 "`%s' failed.",
1965 se->data.server.auth_file);
1966 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
1967 return (-1);
1968 }
1969 }
1970 }
1971 #endif /* }}} HAVE_LIBGCRYPT */
1973 node = se->node;
1974 service = se->service;
1976 if (service == NULL)
1977 service = NET_DEFAULT_PORT;
1979 DEBUG ("network plugin: sockent_open: node = %s; service = %s;",
1980 node, service);
1982 memset (&ai_hints, 0, sizeof (ai_hints));
1983 ai_hints.ai_flags = 0;
1984 #ifdef AI_PASSIVE
1985 ai_hints.ai_flags |= AI_PASSIVE;
1986 #endif
1987 #ifdef AI_ADDRCONFIG
1988 ai_hints.ai_flags |= AI_ADDRCONFIG;
1989 #endif
1990 ai_hints.ai_family = AF_UNSPEC;
1991 ai_hints.ai_socktype = SOCK_DGRAM;
1992 ai_hints.ai_protocol = IPPROTO_UDP;
1994 ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
1995 if (ai_return != 0)
1996 {
1997 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
1998 (se->node == NULL) ? "(null)" : se->node,
1999 (se->service == NULL) ? "(null)" : se->service,
2000 gai_strerror (ai_return));
2001 return (-1);
2002 }
2004 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2005 {
2006 int status;
2008 if (se->type == SOCKENT_TYPE_SERVER) /* {{{ */
2009 {
2010 int *tmp;
2012 tmp = realloc (se->data.server.fd,
2013 sizeof (*tmp) * (se->data.server.fd_num + 1));
2014 if (tmp == NULL)
2015 {
2016 ERROR ("network plugin: realloc failed.");
2017 continue;
2018 }
2019 se->data.server.fd = tmp;
2020 tmp = se->data.server.fd + se->data.server.fd_num;
2022 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
2023 ai_ptr->ai_protocol);
2024 if (*tmp < 0)
2025 {
2026 char errbuf[1024];
2027 ERROR ("network plugin: socket(2) failed: %s",
2028 sstrerror (errno, errbuf,
2029 sizeof (errbuf)));
2030 continue;
2031 }
2033 status = network_bind_socket (*tmp, ai_ptr, se->interface);
2034 if (status != 0)
2035 {
2036 close (*tmp);
2037 *tmp = -1;
2038 continue;
2039 }
2041 se->data.server.fd_num++;
2042 continue;
2043 } /* }}} if (se->type == SOCKENT_TYPE_SERVER) */
2044 else /* if (se->type == SOCKENT_TYPE_CLIENT) {{{ */
2045 {
2046 se->data.client.fd = socket (ai_ptr->ai_family,
2047 ai_ptr->ai_socktype,
2048 ai_ptr->ai_protocol);
2049 if (se->data.client.fd < 0)
2050 {
2051 char errbuf[1024];
2052 ERROR ("network plugin: socket(2) failed: %s",
2053 sstrerror (errno, errbuf,
2054 sizeof (errbuf)));
2055 continue;
2056 }
2058 se->data.client.addr = malloc (sizeof (*se->data.client.addr));
2059 if (se->data.client.addr == NULL)
2060 {
2061 ERROR ("network plugin: malloc failed.");
2062 close (se->data.client.fd);
2063 se->data.client.fd = -1;
2064 continue;
2065 }
2067 memset (se->data.client.addr, 0, sizeof (*se->data.client.addr));
2068 assert (sizeof (*se->data.client.addr) >= ai_ptr->ai_addrlen);
2069 memcpy (se->data.client.addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2070 se->data.client.addrlen = ai_ptr->ai_addrlen;
2072 network_set_ttl (se, ai_ptr);
2073 network_set_interface (se, ai_ptr);
2075 /* We don't open more than one write-socket per
2076 * node/service pair.. */
2077 break;
2078 } /* }}} if (se->type == SOCKENT_TYPE_CLIENT) */
2079 } /* for (ai_list) */
2081 freeaddrinfo (ai_list);
2083 /* Check if all went well. */
2084 if (se->type == SOCKENT_TYPE_SERVER)
2085 {
2086 if (se->data.server.fd_num <= 0)
2087 return (-1);
2088 }
2089 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2090 {
2091 if (se->data.client.fd < 0)
2092 return (-1);
2093 }
2095 return (0);
2096 } /* }}} int sockent_open */
2098 /* Add a sockent to the global list of sockets */
2099 static int sockent_add (sockent_t *se) /* {{{ */
2100 {
2101 sockent_t *last_ptr;
2103 if (se == NULL)
2104 return (-1);
2106 if (se->type == SOCKENT_TYPE_SERVER)
2107 {
2108 struct pollfd *tmp;
2109 size_t i;
2111 tmp = realloc (listen_sockets_pollfd,
2112 sizeof (*tmp) * (listen_sockets_num
2113 + se->data.server.fd_num));
2114 if (tmp == NULL)
2115 {
2116 ERROR ("network plugin: realloc failed.");
2117 return (-1);
2118 }
2119 listen_sockets_pollfd = tmp;
2120 tmp = listen_sockets_pollfd + listen_sockets_num;
2122 for (i = 0; i < se->data.server.fd_num; i++)
2123 {
2124 memset (tmp + i, 0, sizeof (*tmp));
2125 tmp[i].fd = se->data.server.fd[i];
2126 tmp[i].events = POLLIN | POLLPRI;
2127 tmp[i].revents = 0;
2128 }
2130 listen_sockets_num += se->data.server.fd_num;
2132 if (listen_sockets == NULL)
2133 {
2134 listen_sockets = se;
2135 return (0);
2136 }
2137 last_ptr = listen_sockets;
2138 }
2139 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2140 {
2141 if (sending_sockets == NULL)
2142 {
2143 sending_sockets = se;
2144 return (0);
2145 }
2146 last_ptr = sending_sockets;
2147 }
2149 while (last_ptr->next != NULL)
2150 last_ptr = last_ptr->next;
2151 last_ptr->next = se;
2153 return (0);
2154 } /* }}} int sockent_add */
2156 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
2157 {
2158 while (42)
2159 {
2160 receive_list_entry_t *ent;
2161 sockent_t *se;
2163 /* Lock and wait for more data to come in */
2164 pthread_mutex_lock (&receive_list_lock);
2165 while ((listen_loop == 0)
2166 && (receive_list_head == NULL))
2167 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
2169 /* Remove the head entry and unlock */
2170 ent = receive_list_head;
2171 if (ent != NULL)
2172 receive_list_head = ent->next;
2173 receive_list_length--;
2174 pthread_mutex_unlock (&receive_list_lock);
2176 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2177 * because we dispatch all missing packets before shutting down. */
2178 if (ent == NULL)
2179 break;
2181 /* Look for the correct `sockent_t' */
2182 se = listen_sockets;
2183 while (se != NULL)
2184 {
2185 size_t i;
2187 for (i = 0; i < se->data.server.fd_num; i++)
2188 if (se->data.server.fd[i] == ent->fd)
2189 break;
2191 if (i < se->data.server.fd_num)
2192 break;
2194 se = se->next;
2195 }
2197 if (se == NULL)
2198 {
2199 ERROR ("network plugin: Got packet from FD %i, but can't "
2200 "find an appropriate socket entry.",
2201 ent->fd);
2202 sfree (ent->data);
2203 sfree (ent);
2204 continue;
2205 }
2207 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0,
2208 /* username = */ NULL);
2209 sfree (ent->data);
2210 sfree (ent);
2211 } /* while (42) */
2213 return (NULL);
2214 } /* }}} void *dispatch_thread */
2216 static int network_receive (void) /* {{{ */
2217 {
2218 char buffer[network_config_packet_size];
2219 int buffer_len;
2221 int i;
2222 int status;
2224 receive_list_entry_t *private_list_head;
2225 receive_list_entry_t *private_list_tail;
2226 uint64_t private_list_length;
2228 assert (listen_sockets_num > 0);
2230 private_list_head = NULL;
2231 private_list_tail = NULL;
2232 private_list_length = 0;
2234 while (listen_loop == 0)
2235 {
2236 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2238 if (status <= 0)
2239 {
2240 char errbuf[1024];
2241 if (errno == EINTR)
2242 continue;
2243 ERROR ("poll failed: %s",
2244 sstrerror (errno, errbuf, sizeof (errbuf)));
2245 return (-1);
2246 }
2248 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2249 {
2250 receive_list_entry_t *ent;
2252 if ((listen_sockets_pollfd[i].revents
2253 & (POLLIN | POLLPRI)) == 0)
2254 continue;
2255 status--;
2257 buffer_len = recv (listen_sockets_pollfd[i].fd,
2258 buffer, sizeof (buffer),
2259 0 /* no flags */);
2260 if (buffer_len < 0)
2261 {
2262 char errbuf[1024];
2263 ERROR ("recv failed: %s",
2264 sstrerror (errno, errbuf,
2265 sizeof (errbuf)));
2266 return (-1);
2267 }
2269 stats_octets_rx += ((uint64_t) buffer_len);
2270 stats_packets_rx++;
2272 /* TODO: Possible performance enhancement: Do not free
2273 * these entries in the dispatch thread but put them in
2274 * another list, so we don't have to allocate more and
2275 * more of these structures. */
2276 ent = malloc (sizeof (receive_list_entry_t));
2277 if (ent == NULL)
2278 {
2279 ERROR ("network plugin: malloc failed.");
2280 return (-1);
2281 }
2282 memset (ent, 0, sizeof (receive_list_entry_t));
2283 ent->data = malloc (network_config_packet_size);
2284 if (ent->data == NULL)
2285 {
2286 sfree (ent);
2287 ERROR ("network plugin: malloc failed.");
2288 return (-1);
2289 }
2290 ent->fd = listen_sockets_pollfd[i].fd;
2291 ent->next = NULL;
2293 memcpy (ent->data, buffer, buffer_len);
2294 ent->data_len = buffer_len;
2296 if (private_list_head == NULL)
2297 private_list_head = ent;
2298 else
2299 private_list_tail->next = ent;
2300 private_list_tail = ent;
2301 private_list_length++;
2303 /* Do not block here. Blocking here has led to
2304 * insufficient performance in the past. */
2305 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2306 {
2307 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2308 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2310 if (receive_list_head == NULL)
2311 receive_list_head = private_list_head;
2312 else
2313 receive_list_tail->next = private_list_head;
2314 receive_list_tail = private_list_tail;
2315 receive_list_length += private_list_length;
2317 pthread_cond_signal (&receive_list_cond);
2318 pthread_mutex_unlock (&receive_list_lock);
2320 private_list_head = NULL;
2321 private_list_tail = NULL;
2322 private_list_length = 0;
2323 }
2324 } /* for (listen_sockets_pollfd) */
2325 } /* while (listen_loop == 0) */
2327 /* Make sure everything is dispatched before exiting. */
2328 if (private_list_head != NULL)
2329 {
2330 pthread_mutex_lock (&receive_list_lock);
2332 if (receive_list_head == NULL)
2333 receive_list_head = private_list_head;
2334 else
2335 receive_list_tail->next = private_list_head;
2336 receive_list_tail = private_list_tail;
2337 receive_list_length += private_list_length;
2339 private_list_head = NULL;
2340 private_list_tail = NULL;
2341 private_list_length = 0;
2343 pthread_cond_signal (&receive_list_cond);
2344 pthread_mutex_unlock (&receive_list_lock);
2345 }
2347 return (0);
2348 } /* }}} int network_receive */
2350 static void *receive_thread (void __attribute__((unused)) *arg)
2351 {
2352 return (network_receive () ? (void *) 1 : (void *) 0);
2353 } /* void *receive_thread */
2355 static void network_init_buffer (void)
2356 {
2357 memset (send_buffer, 0, network_config_packet_size);
2358 send_buffer_ptr = send_buffer;
2359 send_buffer_fill = 0;
2361 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2362 } /* int network_init_buffer */
2364 static void networt_send_buffer_plain (const sockent_t *se, /* {{{ */
2365 const char *buffer, size_t buffer_size)
2366 {
2367 int status;
2369 while (42)
2370 {
2371 status = sendto (se->data.client.fd, buffer, buffer_size,
2372 /* flags = */ 0,
2373 (struct sockaddr *) se->data.client.addr,
2374 se->data.client.addrlen);
2375 if (status < 0)
2376 {
2377 char errbuf[1024];
2378 if (errno == EINTR)
2379 continue;
2380 ERROR ("network plugin: sendto failed: %s",
2381 sstrerror (errno, errbuf,
2382 sizeof (errbuf)));
2383 break;
2384 }
2386 break;
2387 } /* while (42) */
2388 } /* }}} void networt_send_buffer_plain */
2390 #if HAVE_LIBGCRYPT
2391 #define BUFFER_ADD(p,s) do { \
2392 memcpy (buffer + buffer_offset, (p), (s)); \
2393 buffer_offset += (s); \
2394 } while (0)
2396 static void networt_send_buffer_signed (const sockent_t *se, /* {{{ */
2397 const char *in_buffer, size_t in_buffer_size)
2398 {
2399 part_signature_sha256_t ps;
2400 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2401 size_t buffer_offset;
2402 size_t username_len;
2404 gcry_md_hd_t hd;
2405 gcry_error_t err;
2406 unsigned char *hash;
2408 hd = NULL;
2409 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2410 if (err != 0)
2411 {
2412 ERROR ("network plugin: Creating HMAC object failed: %s",
2413 gcry_strerror (err));
2414 return;
2415 }
2417 err = gcry_md_setkey (hd, se->data.client.password,
2418 strlen (se->data.client.password));
2419 if (err != 0)
2420 {
2421 ERROR ("network plugin: gcry_md_setkey failed: %s",
2422 gcry_strerror (err));
2423 gcry_md_close (hd);
2424 return;
2425 }
2427 username_len = strlen (se->data.client.username);
2428 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2429 {
2430 ERROR ("network plugin: Username too long: %s",
2431 se->data.client.username);
2432 return;
2433 }
2435 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2436 se->data.client.username, username_len);
2437 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2438 in_buffer, in_buffer_size);
2440 /* Initialize the `ps' structure. */
2441 memset (&ps, 0, sizeof (ps));
2442 ps.head.type = htons (TYPE_SIGN_SHA256);
2443 ps.head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len);
2445 /* Calculate the hash value. */
2446 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2447 username_len + in_buffer_size);
2448 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2449 if (hash == NULL)
2450 {
2451 ERROR ("network plugin: gcry_md_read failed.");
2452 gcry_md_close (hd);
2453 return;
2454 }
2455 memcpy (ps.hash, hash, sizeof (ps.hash));
2457 /* Add the header */
2458 buffer_offset = 0;
2460 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2461 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2462 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2464 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2466 gcry_md_close (hd);
2467 hd = NULL;
2469 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2470 networt_send_buffer_plain (se, buffer, buffer_offset);
2471 } /* }}} void networt_send_buffer_signed */
2473 static void networt_send_buffer_encrypted (sockent_t *se, /* {{{ */
2474 const char *in_buffer, size_t in_buffer_size)
2475 {
2476 part_encryption_aes256_t pea;
2477 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2478 size_t buffer_size;
2479 size_t buffer_offset;
2480 size_t header_size;
2481 size_t username_len;
2482 gcry_error_t err;
2483 gcry_cipher_hd_t cypher;
2485 /* Initialize the header fields */
2486 memset (&pea, 0, sizeof (pea));
2487 pea.head.type = htons (TYPE_ENCR_AES256);
2489 pea.username = se->data.client.username;
2491 username_len = strlen (pea.username);
2492 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2493 {
2494 ERROR ("network plugin: Username too long: %s", pea.username);
2495 return;
2496 }
2498 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2499 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2500 - sizeof (pea.hash);
2502 assert (buffer_size <= sizeof (buffer));
2503 DEBUG ("network plugin: networt_send_buffer_encrypted: "
2504 "buffer_size = %zu;", buffer_size);
2506 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2507 + username_len + in_buffer_size));
2508 pea.username_length = htons ((uint16_t) username_len);
2510 /* Chose a random initialization vector. */
2511 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2513 /* Create hash of the payload */
2514 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2516 /* Initialize the buffer */
2517 buffer_offset = 0;
2518 memset (buffer, 0, sizeof (buffer));
2521 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2522 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2523 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2524 BUFFER_ADD (pea.username, username_len);
2525 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2526 assert (buffer_offset == header_size);
2527 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2528 BUFFER_ADD (in_buffer, in_buffer_size);
2530 assert (buffer_offset == buffer_size);
2532 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2533 se->data.client.password);
2534 if (cypher == NULL)
2535 return;
2537 /* Encrypt the buffer in-place */
2538 err = gcry_cipher_encrypt (cypher,
2539 buffer + header_size,
2540 buffer_size - header_size,
2541 /* in = */ NULL, /* in len = */ 0);
2542 if (err != 0)
2543 {
2544 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2545 gcry_strerror (err));
2546 return;
2547 }
2549 /* Send it out without further modifications */
2550 networt_send_buffer_plain (se, buffer, buffer_size);
2551 } /* }}} void networt_send_buffer_encrypted */
2552 #undef BUFFER_ADD
2553 #endif /* HAVE_LIBGCRYPT */
2555 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2556 {
2557 sockent_t *se;
2559 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2561 for (se = sending_sockets; se != NULL; se = se->next)
2562 {
2563 #if HAVE_LIBGCRYPT
2564 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2565 networt_send_buffer_encrypted (se, buffer, buffer_len);
2566 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2567 networt_send_buffer_signed (se, buffer, buffer_len);
2568 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2569 #endif /* HAVE_LIBGCRYPT */
2570 networt_send_buffer_plain (se, buffer, buffer_len);
2571 } /* for (sending_sockets) */
2572 } /* }}} void network_send_buffer */
2574 static int add_to_buffer (char *buffer, int buffer_size, /* {{{ */
2575 value_list_t *vl_def,
2576 const data_set_t *ds, const value_list_t *vl)
2577 {
2578 char *buffer_orig = buffer;
2580 if (strcmp (vl_def->host, vl->host) != 0)
2581 {
2582 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2583 vl->host, strlen (vl->host)) != 0)
2584 return (-1);
2585 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2586 }
2588 if (vl_def->time != vl->time)
2589 {
2590 if (write_part_number (&buffer, &buffer_size, TYPE_TIME,
2591 (uint64_t) vl->time))
2592 return (-1);
2593 vl_def->time = vl->time;
2594 }
2596 if (vl_def->interval != vl->interval)
2597 {
2598 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL,
2599 (uint64_t) vl->interval))
2600 return (-1);
2601 vl_def->interval = vl->interval;
2602 }
2604 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2605 {
2606 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2607 vl->plugin, strlen (vl->plugin)) != 0)
2608 return (-1);
2609 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2610 }
2612 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2613 {
2614 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2615 vl->plugin_instance,
2616 strlen (vl->plugin_instance)) != 0)
2617 return (-1);
2618 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2619 }
2621 if (strcmp (vl_def->type, vl->type) != 0)
2622 {
2623 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2624 vl->type, strlen (vl->type)) != 0)
2625 return (-1);
2626 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2627 }
2629 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2630 {
2631 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2632 vl->type_instance,
2633 strlen (vl->type_instance)) != 0)
2634 return (-1);
2635 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2636 }
2638 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2639 return (-1);
2641 return (buffer - buffer_orig);
2642 } /* }}} int add_to_buffer */
2644 static void flush_buffer (void)
2645 {
2646 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2647 send_buffer_fill);
2649 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2651 stats_octets_tx += ((uint64_t) send_buffer_fill);
2652 stats_packets_tx++;
2654 network_init_buffer ();
2655 }
2657 static int network_write (const data_set_t *ds, const value_list_t *vl,
2658 user_data_t __attribute__((unused)) *user_data)
2659 {
2660 int status;
2662 if (!check_send_okay (vl))
2663 {
2664 #if COLLECT_DEBUG
2665 char name[6*DATA_MAX_NAME_LEN];
2666 FORMAT_VL (name, sizeof (name), vl);
2667 name[sizeof (name) - 1] = 0;
2668 DEBUG ("network plugin: network_write: "
2669 "NOT sending %s.", name);
2670 #endif
2671 /* Counter is not protected by another lock and may be reached by
2672 * multiple threads */
2673 pthread_mutex_lock (&stats_lock);
2674 stats_values_not_sent++;
2675 pthread_mutex_unlock (&stats_lock);
2676 return (0);
2677 }
2679 uc_meta_data_add_unsigned_int (vl,
2680 "network:time_sent", (uint64_t) vl->time);
2682 pthread_mutex_lock (&send_buffer_lock);
2684 status = add_to_buffer (send_buffer_ptr,
2685 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2686 &send_buffer_vl,
2687 ds, vl);
2688 if (status >= 0)
2689 {
2690 /* status == bytes added to the buffer */
2691 send_buffer_fill += status;
2692 send_buffer_ptr += status;
2694 stats_values_sent++;
2695 }
2696 else
2697 {
2698 flush_buffer ();
2700 status = add_to_buffer (send_buffer_ptr,
2701 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2702 &send_buffer_vl,
2703 ds, vl);
2705 if (status >= 0)
2706 {
2707 send_buffer_fill += status;
2708 send_buffer_ptr += status;
2710 stats_values_sent++;
2711 }
2712 }
2714 if (status < 0)
2715 {
2716 ERROR ("network plugin: Unable to append to the "
2717 "buffer for some weird reason");
2718 }
2719 else if ((network_config_packet_size - send_buffer_fill) < 15)
2720 {
2721 flush_buffer ();
2722 }
2724 pthread_mutex_unlock (&send_buffer_lock);
2726 return ((status < 0) ? -1 : 0);
2727 } /* int network_write */
2729 static int network_config_set_boolean (const oconfig_item_t *ci, /* {{{ */
2730 int *retval)
2731 {
2732 if ((ci->values_num != 1)
2733 || ((ci->values[0].type != OCONFIG_TYPE_BOOLEAN)
2734 && (ci->values[0].type != OCONFIG_TYPE_STRING)))
2735 {
2736 ERROR ("network plugin: The `%s' config option needs "
2737 "exactly one boolean argument.", ci->key);
2738 return (-1);
2739 }
2741 if (ci->values[0].type == OCONFIG_TYPE_BOOLEAN)
2742 {
2743 if (ci->values[0].value.boolean)
2744 *retval = 1;
2745 else
2746 *retval = 0;
2747 }
2748 else
2749 {
2750 char *str = ci->values[0].value.string;
2752 if (IS_TRUE (str))
2753 *retval = 1;
2754 else if (IS_FALSE (str))
2755 *retval = 0;
2756 else
2757 {
2758 ERROR ("network plugin: Cannot parse string value `%s' of the `%s' "
2759 "option as boolean value.",
2760 str, ci->key);
2761 return (-1);
2762 }
2763 }
2765 return (0);
2766 } /* }}} int network_config_set_boolean */
2768 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2769 {
2770 int tmp;
2771 if ((ci->values_num != 1)
2772 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2773 {
2774 WARNING ("network plugin: The `TimeToLive' config option needs exactly "
2775 "one numeric argument.");
2776 return (-1);
2777 }
2779 tmp = (int) ci->values[0].value.number;
2780 if ((tmp > 0) && (tmp <= 255))
2781 network_config_ttl = tmp;
2783 return (0);
2784 } /* }}} int network_config_set_ttl */
2786 static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
2787 int *interface)
2788 {
2789 if ((ci->values_num != 1)
2790 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2791 {
2792 WARNING ("network plugin: The `Interface' config option needs exactly "
2793 "one string argument.");
2794 return (-1);
2795 }
2797 if (interface == NULL)
2798 return (-1);
2800 *interface = if_nametoindex (ci->values[0].value.string);
2802 return (0);
2803 } /* }}} int network_config_set_interface */
2805 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
2806 {
2807 int tmp;
2808 if ((ci->values_num != 1)
2809 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2810 {
2811 WARNING ("network plugin: The `MaxPacketSize' config option needs exactly "
2812 "one numeric argument.");
2813 return (-1);
2814 }
2816 tmp = (int) ci->values[0].value.number;
2817 if ((tmp >= 1024) && (tmp <= 65535))
2818 network_config_packet_size = tmp;
2820 return (0);
2821 } /* }}} int network_config_set_buffer_size */
2823 #if HAVE_LIBGCRYPT
2824 static int network_config_set_string (const oconfig_item_t *ci, /* {{{ */
2825 char **ret_string)
2826 {
2827 char *tmp;
2828 if ((ci->values_num != 1)
2829 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2830 {
2831 WARNING ("network plugin: The `%s' config option needs exactly "
2832 "one string argument.", ci->key);
2833 return (-1);
2834 }
2836 tmp = strdup (ci->values[0].value.string);
2837 if (tmp == NULL)
2838 return (-1);
2840 sfree (*ret_string);
2841 *ret_string = tmp;
2843 return (0);
2844 } /* }}} int network_config_set_string */
2845 #endif /* HAVE_LIBGCRYPT */
2847 #if HAVE_LIBGCRYPT
2848 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
2849 int *retval)
2850 {
2851 char *str;
2852 if ((ci->values_num != 1)
2853 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2854 {
2855 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
2856 "one string argument.");
2857 return (-1);
2858 }
2860 str = ci->values[0].value.string;
2861 if (strcasecmp ("Encrypt", str) == 0)
2862 *retval = SECURITY_LEVEL_ENCRYPT;
2863 else if (strcasecmp ("Sign", str) == 0)
2864 *retval = SECURITY_LEVEL_SIGN;
2865 else if (strcasecmp ("None", str) == 0)
2866 *retval = SECURITY_LEVEL_NONE;
2867 else
2868 {
2869 WARNING ("network plugin: Unknown security level: %s.", str);
2870 return (-1);
2871 }
2873 return (0);
2874 } /* }}} int network_config_set_security_level */
2875 #endif /* HAVE_LIBGCRYPT */
2877 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
2878 {
2879 sockent_t *se;
2880 int status;
2881 int i;
2883 if ((ci->values_num < 1) || (ci->values_num > 2)
2884 || (ci->values[0].type != OCONFIG_TYPE_STRING)
2885 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
2886 {
2887 ERROR ("network plugin: The `%s' config option needs "
2888 "one or two string arguments.", ci->key);
2889 return (-1);
2890 }
2892 se = malloc (sizeof (*se));
2893 if (se == NULL)
2894 {
2895 ERROR ("network plugin: malloc failed.");
2896 return (-1);
2897 }
2898 sockent_init (se, SOCKENT_TYPE_SERVER);
2900 se->node = strdup (ci->values[0].value.string);
2901 if (ci->values_num >= 2)
2902 se->service = strdup (ci->values[1].value.string);
2904 for (i = 0; i < ci->children_num; i++)
2905 {
2906 oconfig_item_t *child = ci->children + i;
2908 #if HAVE_LIBGCRYPT
2909 if (strcasecmp ("AuthFile", child->key) == 0)
2910 network_config_set_string (child, &se->data.server.auth_file);
2911 else if (strcasecmp ("SecurityLevel", child->key) == 0)
2912 network_config_set_security_level (child,
2913 &se->data.server.security_level);
2914 else
2915 #endif /* HAVE_LIBGCRYPT */
2916 if (strcasecmp ("Interface", child->key) == 0)
2917 network_config_set_interface (child,
2918 &se->interface);
2919 else
2920 {
2921 WARNING ("network plugin: Option `%s' is not allowed here.",
2922 child->key);
2923 }
2924 }
2926 #if HAVE_LIBGCRYPT
2927 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
2928 && (se->data.server.auth_file == NULL))
2929 {
2930 ERROR ("network plugin: A security level higher than `none' was "
2931 "requested, but no AuthFile option was given. Cowardly refusing to "
2932 "open this socket!");
2933 sockent_destroy (se);
2934 return (-1);
2935 }
2936 #endif /* HAVE_LIBGCRYPT */
2938 status = sockent_open (se);
2939 if (status != 0)
2940 {
2941 ERROR ("network plugin: network_config_add_listen: sockent_open failed.");
2942 sockent_destroy (se);
2943 return (-1);
2944 }
2946 status = sockent_add (se);
2947 if (status != 0)
2948 {
2949 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
2950 sockent_destroy (se);
2951 return (-1);
2952 }
2954 return (0);
2955 } /* }}} int network_config_add_listen */
2957 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
2958 {
2959 sockent_t *se;
2960 int status;
2961 int i;
2963 if ((ci->values_num < 1) || (ci->values_num > 2)
2964 || (ci->values[0].type != OCONFIG_TYPE_STRING)
2965 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
2966 {
2967 ERROR ("network plugin: The `%s' config option needs "
2968 "one or two string arguments.", ci->key);
2969 return (-1);
2970 }
2972 se = malloc (sizeof (*se));
2973 if (se == NULL)
2974 {
2975 ERROR ("network plugin: malloc failed.");
2976 return (-1);
2977 }
2978 sockent_init (se, SOCKENT_TYPE_CLIENT);
2980 se->node = strdup (ci->values[0].value.string);
2981 if (ci->values_num >= 2)
2982 se->service = strdup (ci->values[1].value.string);
2984 for (i = 0; i < ci->children_num; i++)
2985 {
2986 oconfig_item_t *child = ci->children + i;
2988 #if HAVE_LIBGCRYPT
2989 if (strcasecmp ("Username", child->key) == 0)
2990 network_config_set_string (child, &se->data.client.username);
2991 else if (strcasecmp ("Password", child->key) == 0)
2992 network_config_set_string (child, &se->data.client.password);
2993 else if (strcasecmp ("SecurityLevel", child->key) == 0)
2994 network_config_set_security_level (child,
2995 &se->data.client.security_level);
2996 else
2997 #endif /* HAVE_LIBGCRYPT */
2998 if (strcasecmp ("Interface", child->key) == 0)
2999 network_config_set_interface (child,
3000 &se->interface);
3001 else
3002 {
3003 WARNING ("network plugin: Option `%s' is not allowed here.",
3004 child->key);
3005 }
3006 }
3008 #if HAVE_LIBGCRYPT
3009 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
3010 && ((se->data.client.username == NULL)
3011 || (se->data.client.password == NULL)))
3012 {
3013 ERROR ("network plugin: A security level higher than `none' was "
3014 "requested, but no Username or Password option was given. "
3015 "Cowardly refusing to open this socket!");
3016 sockent_destroy (se);
3017 return (-1);
3018 }
3019 #endif /* HAVE_LIBGCRYPT */
3021 status = sockent_open (se);
3022 if (status != 0)
3023 {
3024 ERROR ("network plugin: network_config_add_server: sockent_open failed.");
3025 sockent_destroy (se);
3026 return (-1);
3027 }
3029 status = sockent_add (se);
3030 if (status != 0)
3031 {
3032 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
3033 sockent_destroy (se);
3034 return (-1);
3035 }
3037 return (0);
3038 } /* }}} int network_config_add_server */
3040 static int network_config (oconfig_item_t *ci) /* {{{ */
3041 {
3042 int i;
3044 for (i = 0; i < ci->children_num; i++)
3045 {
3046 oconfig_item_t *child = ci->children + i;
3048 if (strcasecmp ("Listen", child->key) == 0)
3049 network_config_add_listen (child);
3050 else if (strcasecmp ("Server", child->key) == 0)
3051 network_config_add_server (child);
3052 else if (strcasecmp ("TimeToLive", child->key) == 0)
3053 network_config_set_ttl (child);
3054 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
3055 network_config_set_buffer_size (child);
3056 else if (strcasecmp ("Forward", child->key) == 0)
3057 network_config_set_boolean (child, &network_config_forward);
3058 else if (strcasecmp ("ReportStats", child->key) == 0)
3059 network_config_set_boolean (child, &network_config_stats);
3060 else if (strcasecmp ("CacheFlush", child->key) == 0)
3061 /* no op for backwards compatibility only */;
3062 else
3063 {
3064 WARNING ("network plugin: Option `%s' is not allowed here.",
3065 child->key);
3066 }
3067 }
3069 return (0);
3070 } /* }}} int network_config */
3072 static int network_notification (const notification_t *n,
3073 user_data_t __attribute__((unused)) *user_data)
3074 {
3075 char buffer[network_config_packet_size];
3076 char *buffer_ptr = buffer;
3077 int buffer_free = sizeof (buffer);
3078 int status;
3080 memset (buffer, '\0', sizeof (buffer));
3083 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME,
3084 (uint64_t) n->time);
3085 if (status != 0)
3086 return (-1);
3088 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
3089 (uint64_t) n->severity);
3090 if (status != 0)
3091 return (-1);
3093 if (strlen (n->host) > 0)
3094 {
3095 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
3096 n->host, strlen (n->host));
3097 if (status != 0)
3098 return (-1);
3099 }
3101 if (strlen (n->plugin) > 0)
3102 {
3103 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
3104 n->plugin, strlen (n->plugin));
3105 if (status != 0)
3106 return (-1);
3107 }
3109 if (strlen (n->plugin_instance) > 0)
3110 {
3111 status = write_part_string (&buffer_ptr, &buffer_free,
3112 TYPE_PLUGIN_INSTANCE,
3113 n->plugin_instance, strlen (n->plugin_instance));
3114 if (status != 0)
3115 return (-1);
3116 }
3118 if (strlen (n->type) > 0)
3119 {
3120 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3121 n->type, strlen (n->type));
3122 if (status != 0)
3123 return (-1);
3124 }
3126 if (strlen (n->type_instance) > 0)
3127 {
3128 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3129 n->type_instance, strlen (n->type_instance));
3130 if (status != 0)
3131 return (-1);
3132 }
3134 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3135 n->message, strlen (n->message));
3136 if (status != 0)
3137 return (-1);
3139 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3141 return (0);
3142 } /* int network_notification */
3144 static int network_shutdown (void)
3145 {
3146 listen_loop++;
3148 /* Kill the listening thread */
3149 if (receive_thread_running != 0)
3150 {
3151 INFO ("network plugin: Stopping receive thread.");
3152 pthread_kill (receive_thread_id, SIGTERM);
3153 pthread_join (receive_thread_id, NULL /* no return value */);
3154 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3155 receive_thread_running = 0;
3156 }
3158 /* Shutdown the dispatching thread */
3159 if (dispatch_thread_running != 0)
3160 {
3161 INFO ("network plugin: Stopping dispatch thread.");
3162 pthread_mutex_lock (&receive_list_lock);
3163 pthread_cond_broadcast (&receive_list_cond);
3164 pthread_mutex_unlock (&receive_list_lock);
3165 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3166 dispatch_thread_running = 0;
3167 }
3169 sockent_destroy (listen_sockets);
3171 if (send_buffer_fill > 0)
3172 flush_buffer ();
3174 sfree (send_buffer);
3176 /* TODO: Close `sending_sockets' */
3178 plugin_unregister_config ("network");
3179 plugin_unregister_init ("network");
3180 plugin_unregister_write ("network");
3181 plugin_unregister_shutdown ("network");
3183 return (0);
3184 } /* int network_shutdown */
3186 static int network_stats_read (void) /* {{{ */
3187 {
3188 uint64_t copy_octets_rx;
3189 uint64_t copy_octets_tx;
3190 uint64_t copy_packets_rx;
3191 uint64_t copy_packets_tx;
3192 uint64_t copy_values_dispatched;
3193 uint64_t copy_values_not_dispatched;
3194 uint64_t copy_values_sent;
3195 uint64_t copy_values_not_sent;
3196 uint64_t copy_receive_list_length;
3197 value_list_t vl = VALUE_LIST_INIT;
3198 value_t values[2];
3200 copy_octets_rx = stats_octets_rx;
3201 copy_octets_tx = stats_octets_tx;
3202 copy_packets_rx = stats_packets_rx;
3203 copy_packets_tx = stats_packets_tx;
3204 copy_values_dispatched = stats_values_dispatched;
3205 copy_values_not_dispatched = stats_values_not_dispatched;
3206 copy_values_sent = stats_values_sent;
3207 copy_values_not_sent = stats_values_not_sent;
3208 copy_receive_list_length = receive_list_length;
3210 /* Initialize `vl' */
3211 vl.values = values;
3212 vl.values_len = 2;
3213 vl.time = 0;
3214 vl.interval = interval_g;
3215 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3216 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3218 /* Octets received / sent */
3219 vl.values[0].counter = (counter_t) copy_octets_rx;
3220 vl.values[1].counter = (counter_t) copy_octets_tx;
3221 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3222 plugin_dispatch_values (&vl);
3224 /* Packets received / send */
3225 vl.values[0].counter = (counter_t) copy_packets_rx;
3226 vl.values[1].counter = (counter_t) copy_packets_tx;
3227 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3228 plugin_dispatch_values (&vl);
3230 /* Values (not) dispatched and (not) send */
3231 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3232 vl.values_len = 1;
3234 vl.values[0].derive = (derive_t) copy_values_dispatched;
3235 sstrncpy (vl.type_instance, "dispatch-accepted",
3236 sizeof (vl.type_instance));
3237 plugin_dispatch_values (&vl);
3239 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3240 sstrncpy (vl.type_instance, "dispatch-rejected",
3241 sizeof (vl.type_instance));
3242 plugin_dispatch_values (&vl);
3244 vl.values[0].derive = (derive_t) copy_values_sent;
3245 sstrncpy (vl.type_instance, "send-accepted",
3246 sizeof (vl.type_instance));
3247 plugin_dispatch_values (&vl);
3249 vl.values[0].derive = (derive_t) copy_values_not_sent;
3250 sstrncpy (vl.type_instance, "send-rejected",
3251 sizeof (vl.type_instance));
3252 plugin_dispatch_values (&vl);
3254 /* Receive queue length */
3255 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3256 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3257 vl.type_instance[0] = 0;
3258 plugin_dispatch_values (&vl);
3260 return (0);
3261 } /* }}} int network_stats_read */
3263 static int network_init (void)
3264 {
3265 static _Bool have_init = false;
3267 /* Check if we were already initialized. If so, just return - there's
3268 * nothing more to do (for now, that is). */
3269 if (have_init)
3270 return (0);
3271 have_init = true;
3273 #if HAVE_LIBGCRYPT
3274 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
3275 gcry_control (GCRYCTL_INIT_SECMEM, 32768, 0);
3276 gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
3277 #endif
3279 if (network_config_stats != 0)
3280 plugin_register_read ("network", network_stats_read);
3282 plugin_register_shutdown ("network", network_shutdown);
3284 send_buffer = malloc (network_config_packet_size);
3285 if (send_buffer == NULL)
3286 {
3287 ERROR ("network plugin: malloc failed.");
3288 return (-1);
3289 }
3290 network_init_buffer ();
3292 /* setup socket(s) and so on */
3293 if (sending_sockets != NULL)
3294 {
3295 plugin_register_write ("network", network_write,
3296 /* user_data = */ NULL);
3297 plugin_register_notification ("network", network_notification,
3298 /* user_data = */ NULL);
3299 }
3301 /* If no threads need to be started, return here. */
3302 if ((listen_sockets_num == 0)
3303 || ((dispatch_thread_running != 0)
3304 && (receive_thread_running != 0)))
3305 return (0);
3307 if (dispatch_thread_running == 0)
3308 {
3309 int status;
3310 status = pthread_create (&dispatch_thread_id,
3311 NULL /* no attributes */,
3312 dispatch_thread,
3313 NULL /* no argument */);
3314 if (status != 0)
3315 {
3316 char errbuf[1024];
3317 ERROR ("network: pthread_create failed: %s",
3318 sstrerror (errno, errbuf,
3319 sizeof (errbuf)));
3320 }
3321 else
3322 {
3323 dispatch_thread_running = 1;
3324 }
3325 }
3327 if (receive_thread_running == 0)
3328 {
3329 int status;
3330 status = pthread_create (&receive_thread_id,
3331 NULL /* no attributes */,
3332 receive_thread,
3333 NULL /* no argument */);
3334 if (status != 0)
3335 {
3336 char errbuf[1024];
3337 ERROR ("network: pthread_create failed: %s",
3338 sstrerror (errno, errbuf,
3339 sizeof (errbuf)));
3340 }
3341 else
3342 {
3343 receive_thread_running = 1;
3344 }
3345 }
3347 return (0);
3348 } /* int network_init */
3350 /*
3351 * The flush option of the network plugin cannot flush individual identifiers.
3352 * All the values are added to a buffer and sent when the buffer is full, the
3353 * requested value may or may not be in there, it's not worth finding out. We
3354 * just send the buffer if `flush' is called - if the requested value was in
3355 * there, good. If not, well, then there is nothing to flush.. -octo
3356 */
3357 static int network_flush (int timeout,
3358 const char __attribute__((unused)) *identifier,
3359 user_data_t __attribute__((unused)) *user_data)
3360 {
3361 pthread_mutex_lock (&send_buffer_lock);
3363 if (send_buffer_fill > 0)
3364 flush_buffer ();
3366 pthread_mutex_unlock (&send_buffer_lock);
3368 return (0);
3369 } /* int network_flush */
3371 void module_register (void)
3372 {
3373 plugin_register_complex_config ("network", network_config);
3374 plugin_register_init ("network", network_init);
3375 plugin_register_flush ("network", network_flush,
3376 /* user_data = */ NULL);
3377 } /* void module_register */
3379 /* vim: set fdm=marker : */