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;
792 if ((buffer_len < 0) || ((size_t) buffer_len < exp_size))
793 {
794 WARNING ("network plugin: parse_part_number: "
795 "Packet too short: "
796 "Chunk of size %zu expected, "
797 "but buffer has only %zu bytes left.",
798 exp_size, buffer_len);
799 return (-1);
800 }
802 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
803 buffer += sizeof (tmp16);
804 /* pkg_type = ntohs (tmp16); */
806 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
807 buffer += sizeof (tmp16);
808 pkg_length = ntohs (tmp16);
810 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
811 buffer += sizeof (tmp64);
812 *value = ntohll (tmp64);
814 *ret_buffer = buffer;
815 *ret_buffer_len = buffer_len - pkg_length;
817 return (0);
818 } /* int parse_part_number */
820 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
821 char *output, int output_len)
822 {
823 char *buffer = *ret_buffer;
824 size_t buffer_len = *ret_buffer_len;
826 uint16_t tmp16;
827 size_t header_size = 2 * sizeof (uint16_t);
829 uint16_t pkg_length;
831 if ((buffer_len < 0) || (buffer_len < header_size))
832 {
833 WARNING ("network plugin: parse_part_string: "
834 "Packet too short: "
835 "Chunk of at least size %zu expected, "
836 "but buffer has only %zu bytes left.",
837 header_size, buffer_len);
838 return (-1);
839 }
841 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
842 buffer += sizeof (tmp16);
843 /* pkg_type = ntohs (tmp16); */
845 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
846 buffer += sizeof (tmp16);
847 pkg_length = ntohs (tmp16);
849 /* Check that packet fits in the input buffer */
850 if (pkg_length > buffer_len)
851 {
852 WARNING ("network plugin: parse_part_string: "
853 "Packet too big: "
854 "Chunk of size %"PRIu16" received, "
855 "but buffer has only %zu bytes left.",
856 pkg_length, buffer_len);
857 return (-1);
858 }
860 /* Check that pkg_length is in the valid range */
861 if (pkg_length <= header_size)
862 {
863 WARNING ("network plugin: parse_part_string: "
864 "Packet too short: "
865 "Header claims this packet is only %hu "
866 "bytes long.", pkg_length);
867 return (-1);
868 }
870 /* Check that the package data fits into the output buffer.
871 * The previous if-statement ensures that:
872 * `pkg_length > header_size' */
873 if ((output_len < 0)
874 || ((size_t) output_len < ((size_t) pkg_length - header_size)))
875 {
876 WARNING ("network plugin: parse_part_string: "
877 "Output buffer too small.");
878 return (-1);
879 }
881 /* All sanity checks successfull, let's copy the data over */
882 output_len = pkg_length - header_size;
883 memcpy ((void *) output, (void *) buffer, output_len);
884 buffer += output_len;
886 /* For some very weird reason '\0' doesn't do the trick on SPARC in
887 * this statement. */
888 if (output[output_len - 1] != 0)
889 {
890 WARNING ("network plugin: parse_part_string: "
891 "Received string does not end "
892 "with a NULL-byte.");
893 return (-1);
894 }
896 *ret_buffer = buffer;
897 *ret_buffer_len = buffer_len - pkg_length;
899 return (0);
900 } /* int parse_part_string */
902 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
903 * parse_packet and vice versa. */
904 #define PP_SIGNED 0x01
905 #define PP_ENCRYPTED 0x02
906 static int parse_packet (sockent_t *se,
907 void *buffer, size_t buffer_size, int flags,
908 const char *username);
910 #define BUFFER_READ(p,s) do { \
911 memcpy ((p), buffer + buffer_offset, (s)); \
912 buffer_offset += (s); \
913 } while (0)
915 #if HAVE_LIBGCRYPT
916 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
917 void **ret_buffer, size_t *ret_buffer_len, int flags)
918 {
919 static c_complain_t complain_no_users = C_COMPLAIN_INIT_STATIC;
921 char *buffer;
922 size_t buffer_len;
923 size_t buffer_offset;
925 size_t username_len;
926 char *secret;
928 part_signature_sha256_t pss;
929 uint16_t pss_head_length;
930 char hash[sizeof (pss.hash)];
932 gcry_md_hd_t hd;
933 gcry_error_t err;
934 unsigned char *hash_ptr;
936 buffer = *ret_buffer;
937 buffer_len = *ret_buffer_len;
938 buffer_offset = 0;
940 if (se->data.server.userdb == NULL)
941 {
942 c_complain (LOG_NOTICE, &complain_no_users,
943 "network plugin: Received signed network packet but can't verify it "
944 "because no user DB has been configured. Will accept it.");
945 return (0);
946 }
948 /* Check if the buffer has enough data for this structure. */
949 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
950 return (-ENOMEM);
952 /* Read type and length header */
953 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
954 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
955 pss_head_length = ntohs (pss.head.length);
957 /* Check if the `pss_head_length' is within bounds. */
958 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
959 || (pss_head_length > buffer_len))
960 {
961 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
962 return (-1);
963 }
965 /* Copy the hash. */
966 BUFFER_READ (pss.hash, sizeof (pss.hash));
968 /* Calculate username length (without null byte) and allocate memory */
969 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
970 pss.username = malloc (username_len + 1);
971 if (pss.username == NULL)
972 return (-ENOMEM);
974 /* Read the username */
975 BUFFER_READ (pss.username, username_len);
976 pss.username[username_len] = 0;
978 assert (buffer_offset == pss_head_length);
980 /* Query the password */
981 secret = fbh_get (se->data.server.userdb, pss.username);
982 if (secret == NULL)
983 {
984 ERROR ("network plugin: Unknown user: %s", pss.username);
985 sfree (pss.username);
986 return (-ENOENT);
987 }
989 /* Create a hash device and check the HMAC */
990 hd = NULL;
991 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
992 if (err != 0)
993 {
994 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
995 gcry_strerror (err));
996 sfree (secret);
997 sfree (pss.username);
998 return (-1);
999 }
1001 err = gcry_md_setkey (hd, secret, strlen (secret));
1002 if (err != 0)
1003 {
1004 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
1005 gcry_md_close (hd);
1006 sfree (secret);
1007 sfree (pss.username);
1008 return (-1);
1009 }
1011 gcry_md_write (hd,
1012 buffer + PART_SIGNATURE_SHA256_SIZE,
1013 buffer_len - PART_SIGNATURE_SHA256_SIZE);
1014 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
1015 if (hash_ptr == NULL)
1016 {
1017 ERROR ("network plugin: gcry_md_read failed.");
1018 gcry_md_close (hd);
1019 sfree (secret);
1020 sfree (pss.username);
1021 return (-1);
1022 }
1023 memcpy (hash, hash_ptr, sizeof (hash));
1025 /* Clean up */
1026 gcry_md_close (hd);
1027 hd = NULL;
1029 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1030 {
1031 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1032 "Hash mismatch.");
1033 }
1034 else
1035 {
1036 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1037 flags | PP_SIGNED, pss.username);
1038 }
1040 sfree (secret);
1041 sfree (pss.username);
1043 *ret_buffer = buffer + buffer_len;
1044 *ret_buffer_len = 0;
1046 return (0);
1047 } /* }}} int parse_part_sign_sha256 */
1048 /* #endif HAVE_LIBGCRYPT */
1050 #else /* if !HAVE_LIBGCRYPT */
1051 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1052 void **ret_buffer, size_t *ret_buffer_size, int flags)
1053 {
1054 static int warning_has_been_printed = 0;
1056 char *buffer;
1057 size_t buffer_size;
1058 size_t buffer_offset;
1059 uint16_t part_len;
1061 part_signature_sha256_t pss;
1063 buffer = *ret_buffer;
1064 buffer_size = *ret_buffer_size;
1065 buffer_offset = 0;
1067 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1068 return (-ENOMEM);
1070 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1071 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1072 part_len = ntohs (pss.head.length);
1074 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1075 || (part_len > buffer_size))
1076 return (-EINVAL);
1078 if (warning_has_been_printed == 0)
1079 {
1080 WARNING ("network plugin: Received signed packet, but the network "
1081 "plugin was not linked with libgcrypt, so I cannot "
1082 "verify the signature. The packet will be accepted.");
1083 warning_has_been_printed = 1;
1084 }
1086 parse_packet (se, buffer + part_len, buffer_size - part_len, flags,
1087 /* username = */ NULL);
1089 *ret_buffer = buffer + buffer_size;
1090 *ret_buffer_size = 0;
1092 return (0);
1093 } /* }}} int parse_part_sign_sha256 */
1094 #endif /* !HAVE_LIBGCRYPT */
1096 #if HAVE_LIBGCRYPT
1097 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1098 void **ret_buffer, size_t *ret_buffer_len,
1099 int flags)
1100 {
1101 char *buffer = *ret_buffer;
1102 size_t buffer_len = *ret_buffer_len;
1103 size_t payload_len;
1104 size_t part_size;
1105 size_t buffer_offset;
1106 uint16_t username_len;
1107 part_encryption_aes256_t pea;
1108 unsigned char hash[sizeof (pea.hash)];
1110 gcry_cipher_hd_t cypher;
1111 gcry_error_t err;
1113 /* Make sure at least the header if available. */
1114 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1115 {
1116 NOTICE ("network plugin: parse_part_encr_aes256: "
1117 "Discarding short packet.");
1118 return (-1);
1119 }
1121 buffer_offset = 0;
1123 /* Copy the unencrypted information into `pea'. */
1124 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1125 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1127 /* Check the `part size'. */
1128 part_size = ntohs (pea.head.length);
1129 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1130 || (part_size > buffer_len))
1131 {
1132 NOTICE ("network plugin: parse_part_encr_aes256: "
1133 "Discarding part with invalid size.");
1134 return (-1);
1135 }
1137 /* Read the username */
1138 BUFFER_READ (&username_len, sizeof (username_len));
1139 username_len = ntohs (username_len);
1141 if ((username_len <= 0)
1142 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1143 {
1144 NOTICE ("network plugin: parse_part_encr_aes256: "
1145 "Discarding part with invalid username length.");
1146 return (-1);
1147 }
1149 assert (username_len > 0);
1150 pea.username = malloc (username_len + 1);
1151 if (pea.username == NULL)
1152 return (-ENOMEM);
1153 BUFFER_READ (pea.username, username_len);
1154 pea.username[username_len] = 0;
1156 /* Last but not least, the initialization vector */
1157 BUFFER_READ (pea.iv, sizeof (pea.iv));
1159 /* Make sure we are at the right position */
1160 assert (buffer_offset == (username_len +
1161 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1163 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1164 pea.username);
1165 if (cypher == NULL)
1166 {
1167 sfree (pea.username);
1168 return (-1);
1169 }
1171 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1172 assert (payload_len > 0);
1174 /* Decrypt the packet in-place */
1175 err = gcry_cipher_decrypt (cypher,
1176 buffer + buffer_offset,
1177 part_size - buffer_offset,
1178 /* in = */ NULL, /* in len = */ 0);
1179 if (err != 0)
1180 {
1181 sfree (pea.username);
1182 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1183 gcry_strerror (err));
1184 return (-1);
1185 }
1187 /* Read the hash */
1188 BUFFER_READ (pea.hash, sizeof (pea.hash));
1190 /* Make sure we're at the right position - again */
1191 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1192 assert (buffer_offset == (part_size - payload_len));
1194 /* Check hash sum */
1195 memset (hash, 0, sizeof (hash));
1196 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1197 buffer + buffer_offset, payload_len);
1198 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1199 {
1200 sfree (pea.username);
1201 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1202 return (-1);
1203 }
1205 parse_packet (se, buffer + buffer_offset, payload_len,
1206 flags | PP_ENCRYPTED, pea.username);
1208 /* XXX: Free pea.username?!? */
1210 /* Update return values */
1211 *ret_buffer = buffer + part_size;
1212 *ret_buffer_len = buffer_len - part_size;
1214 sfree (pea.username);
1216 return (0);
1217 } /* }}} int parse_part_encr_aes256 */
1218 /* #endif HAVE_LIBGCRYPT */
1220 #else /* if !HAVE_LIBGCRYPT */
1221 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1222 void **ret_buffer, size_t *ret_buffer_size, int flags)
1223 {
1224 static int warning_has_been_printed = 0;
1226 char *buffer;
1227 size_t buffer_size;
1228 size_t buffer_offset;
1230 part_header_t ph;
1231 size_t ph_length;
1233 buffer = *ret_buffer;
1234 buffer_size = *ret_buffer_size;
1235 buffer_offset = 0;
1237 /* parse_packet assures this minimum size. */
1238 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1240 BUFFER_READ (&ph.type, sizeof (ph.type));
1241 BUFFER_READ (&ph.length, sizeof (ph.length));
1242 ph_length = ntohs (ph.length);
1244 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1245 || (ph_length > buffer_size))
1246 {
1247 ERROR ("network plugin: AES-256 encrypted part "
1248 "with invalid length received.");
1249 return (-1);
1250 }
1252 if (warning_has_been_printed == 0)
1253 {
1254 WARNING ("network plugin: Received encrypted packet, but the network "
1255 "plugin was not linked with libgcrypt, so I cannot "
1256 "decrypt it. The part will be discarded.");
1257 warning_has_been_printed = 1;
1258 }
1260 *ret_buffer += ph_length;
1261 *ret_buffer_size -= ph_length;
1263 return (0);
1264 } /* }}} int parse_part_encr_aes256 */
1265 #endif /* !HAVE_LIBGCRYPT */
1267 #undef BUFFER_READ
1269 static int parse_packet (sockent_t *se, /* {{{ */
1270 void *buffer, size_t buffer_size, int flags,
1271 const char *username)
1272 {
1273 int status;
1275 value_list_t vl = VALUE_LIST_INIT;
1276 notification_t n;
1278 #if HAVE_LIBGCRYPT
1279 int packet_was_signed = (flags & PP_SIGNED);
1280 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1281 int printed_ignore_warning = 0;
1282 #endif /* HAVE_LIBGCRYPT */
1285 memset (&vl, '\0', sizeof (vl));
1286 memset (&n, '\0', sizeof (n));
1287 status = 0;
1289 while ((status == 0) && (0 < buffer_size)
1290 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1291 {
1292 uint16_t pkg_length;
1293 uint16_t pkg_type;
1295 memcpy ((void *) &pkg_type,
1296 (void *) buffer,
1297 sizeof (pkg_type));
1298 memcpy ((void *) &pkg_length,
1299 (void *) (buffer + sizeof (pkg_type)),
1300 sizeof (pkg_length));
1302 pkg_length = ntohs (pkg_length);
1303 pkg_type = ntohs (pkg_type);
1305 if (pkg_length > buffer_size)
1306 break;
1307 /* Ensure that this loop terminates eventually */
1308 if (pkg_length < (2 * sizeof (uint16_t)))
1309 break;
1311 if (pkg_type == TYPE_ENCR_AES256)
1312 {
1313 status = parse_part_encr_aes256 (se,
1314 &buffer, &buffer_size, flags);
1315 if (status != 0)
1316 {
1317 ERROR ("network plugin: Decrypting AES256 "
1318 "part failed "
1319 "with status %i.", status);
1320 break;
1321 }
1322 }
1323 #if HAVE_LIBGCRYPT
1324 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1325 && (packet_was_encrypted == 0))
1326 {
1327 if (printed_ignore_warning == 0)
1328 {
1329 INFO ("network plugin: Unencrypted packet or "
1330 "part has been ignored.");
1331 printed_ignore_warning = 1;
1332 }
1333 buffer = ((char *) buffer) + pkg_length;
1334 continue;
1335 }
1336 #endif /* HAVE_LIBGCRYPT */
1337 else if (pkg_type == TYPE_SIGN_SHA256)
1338 {
1339 status = parse_part_sign_sha256 (se,
1340 &buffer, &buffer_size, flags);
1341 if (status != 0)
1342 {
1343 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1344 "signature failed "
1345 "with status %i.", status);
1346 break;
1347 }
1348 }
1349 #if HAVE_LIBGCRYPT
1350 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1351 && (packet_was_encrypted == 0)
1352 && (packet_was_signed == 0))
1353 {
1354 if (printed_ignore_warning == 0)
1355 {
1356 INFO ("network plugin: Unsigned packet or "
1357 "part has been ignored.");
1358 printed_ignore_warning = 1;
1359 }
1360 buffer = ((char *) buffer) + pkg_length;
1361 continue;
1362 }
1363 #endif /* HAVE_LIBGCRYPT */
1364 else if (pkg_type == TYPE_VALUES)
1365 {
1366 status = parse_part_values (&buffer, &buffer_size,
1367 &vl.values, &vl.values_len);
1368 if (status != 0)
1369 break;
1371 network_dispatch_values (&vl, username);
1373 sfree (vl.values);
1374 }
1375 else if (pkg_type == TYPE_TIME)
1376 {
1377 uint64_t tmp = 0;
1378 status = parse_part_number (&buffer, &buffer_size,
1379 &tmp);
1380 if (status == 0)
1381 {
1382 vl.time = (time_t) tmp;
1383 n.time = (time_t) tmp;
1384 }
1385 }
1386 else if (pkg_type == TYPE_INTERVAL)
1387 {
1388 uint64_t tmp = 0;
1389 status = parse_part_number (&buffer, &buffer_size,
1390 &tmp);
1391 if (status == 0)
1392 vl.interval = (int) tmp;
1393 }
1394 else if (pkg_type == TYPE_HOST)
1395 {
1396 status = parse_part_string (&buffer, &buffer_size,
1397 vl.host, sizeof (vl.host));
1398 if (status == 0)
1399 sstrncpy (n.host, vl.host, sizeof (n.host));
1400 }
1401 else if (pkg_type == TYPE_PLUGIN)
1402 {
1403 status = parse_part_string (&buffer, &buffer_size,
1404 vl.plugin, sizeof (vl.plugin));
1405 if (status == 0)
1406 sstrncpy (n.plugin, vl.plugin,
1407 sizeof (n.plugin));
1408 }
1409 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1410 {
1411 status = parse_part_string (&buffer, &buffer_size,
1412 vl.plugin_instance,
1413 sizeof (vl.plugin_instance));
1414 if (status == 0)
1415 sstrncpy (n.plugin_instance,
1416 vl.plugin_instance,
1417 sizeof (n.plugin_instance));
1418 }
1419 else if (pkg_type == TYPE_TYPE)
1420 {
1421 status = parse_part_string (&buffer, &buffer_size,
1422 vl.type, sizeof (vl.type));
1423 if (status == 0)
1424 sstrncpy (n.type, vl.type, sizeof (n.type));
1425 }
1426 else if (pkg_type == TYPE_TYPE_INSTANCE)
1427 {
1428 status = parse_part_string (&buffer, &buffer_size,
1429 vl.type_instance,
1430 sizeof (vl.type_instance));
1431 if (status == 0)
1432 sstrncpy (n.type_instance, vl.type_instance,
1433 sizeof (n.type_instance));
1434 }
1435 else if (pkg_type == TYPE_MESSAGE)
1436 {
1437 status = parse_part_string (&buffer, &buffer_size,
1438 n.message, sizeof (n.message));
1440 if (status != 0)
1441 {
1442 /* do nothing */
1443 }
1444 else if ((n.severity != NOTIF_FAILURE)
1445 && (n.severity != NOTIF_WARNING)
1446 && (n.severity != NOTIF_OKAY))
1447 {
1448 INFO ("network plugin: "
1449 "Ignoring notification with "
1450 "unknown severity %i.",
1451 n.severity);
1452 }
1453 else if (n.time <= 0)
1454 {
1455 INFO ("network plugin: "
1456 "Ignoring notification with "
1457 "time == 0.");
1458 }
1459 else if (strlen (n.message) <= 0)
1460 {
1461 INFO ("network plugin: "
1462 "Ignoring notification with "
1463 "an empty message.");
1464 }
1465 else
1466 {
1467 plugin_dispatch_notification (&n);
1468 }
1469 }
1470 else if (pkg_type == TYPE_SEVERITY)
1471 {
1472 uint64_t tmp = 0;
1473 status = parse_part_number (&buffer, &buffer_size,
1474 &tmp);
1475 if (status == 0)
1476 n.severity = (int) tmp;
1477 }
1478 else
1479 {
1480 DEBUG ("network plugin: parse_packet: Unknown part"
1481 " type: 0x%04hx", pkg_type);
1482 buffer = ((char *) buffer) + pkg_length;
1483 }
1484 } /* while (buffer_size > sizeof (part_header_t)) */
1486 if (status == 0 && buffer_size > 0)
1487 WARNING ("network plugin: parse_packet: Received truncated "
1488 "packet, try increasing `MaxPacketSize'");
1490 return (status);
1491 } /* }}} int parse_packet */
1493 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1494 {
1495 if (sec->fd >= 0)
1496 {
1497 close (sec->fd);
1498 sec->fd = -1;
1499 }
1500 sfree (sec->addr);
1501 #if HAVE_LIBGCRYPT
1502 sfree (sec->username);
1503 sfree (sec->password);
1504 if (sec->cypher != NULL)
1505 gcry_cipher_close (sec->cypher);
1506 #endif
1507 } /* }}} void free_sockent_client */
1509 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1510 {
1511 size_t i;
1513 for (i = 0; i < ses->fd_num; i++)
1514 {
1515 if (ses->fd[i] >= 0)
1516 {
1517 close (ses->fd[i]);
1518 ses->fd[i] = -1;
1519 }
1520 }
1522 sfree (ses->fd);
1523 #if HAVE_LIBGCRYPT
1524 sfree (ses->auth_file);
1525 fbh_destroy (ses->userdb);
1526 if (ses->cypher != NULL)
1527 gcry_cipher_close (ses->cypher);
1528 #endif
1529 } /* }}} void free_sockent_server */
1531 static void sockent_destroy (sockent_t *se) /* {{{ */
1532 {
1533 sockent_t *next;
1535 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1537 while (se != NULL)
1538 {
1539 next = se->next;
1541 sfree (se->node);
1542 sfree (se->service);
1544 if (se->type == SOCKENT_TYPE_CLIENT)
1545 free_sockent_client (&se->data.client);
1546 else
1547 free_sockent_server (&se->data.server);
1549 sfree (se);
1550 se = next;
1551 }
1552 } /* }}} void sockent_destroy */
1554 /*
1555 * int network_set_ttl
1556 *
1557 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1558 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1559 *
1560 * The `struct addrinfo' is used to destinguish between unicast and multicast
1561 * sockets.
1562 */
1563 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1564 {
1565 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1566 network_config_ttl);
1568 assert (se->type == SOCKENT_TYPE_CLIENT);
1570 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1571 return (-1);
1573 if (ai->ai_family == AF_INET)
1574 {
1575 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1576 int optname;
1578 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1579 optname = IP_MULTICAST_TTL;
1580 else
1581 optname = IP_TTL;
1583 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1584 &network_config_ttl,
1585 sizeof (network_config_ttl)) != 0)
1586 {
1587 char errbuf[1024];
1588 ERROR ("setsockopt: %s",
1589 sstrerror (errno, errbuf, sizeof (errbuf)));
1590 return (-1);
1591 }
1592 }
1593 else if (ai->ai_family == AF_INET6)
1594 {
1595 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1596 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1597 int optname;
1599 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1600 optname = IPV6_MULTICAST_HOPS;
1601 else
1602 optname = IPV6_UNICAST_HOPS;
1604 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1605 &network_config_ttl,
1606 sizeof (network_config_ttl)) != 0)
1607 {
1608 char errbuf[1024];
1609 ERROR ("setsockopt: %s",
1610 sstrerror (errno, errbuf,
1611 sizeof (errbuf)));
1612 return (-1);
1613 }
1614 }
1616 return (0);
1617 } /* int network_set_ttl */
1619 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1620 {
1621 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1622 se->interface);
1624 assert (se->type == SOCKENT_TYPE_CLIENT);
1626 if (ai->ai_family == AF_INET)
1627 {
1628 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1630 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1631 {
1632 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1633 /* If possible, use the "ip_mreqn" structure which has
1634 * an "interface index" member. Using the interface
1635 * index is preferred here, because of its similarity
1636 * to the way IPv6 handles this. Unfortunately, it
1637 * appears not to be portable. */
1638 struct ip_mreqn mreq;
1640 memset (&mreq, 0, sizeof (mreq));
1641 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1642 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1643 mreq.imr_ifindex = se->interface;
1644 #else
1645 struct ip_mreq mreq;
1647 memset (&mreq, 0, sizeof (mreq));
1648 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1649 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1650 #endif
1652 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1653 &mreq, sizeof (mreq)) != 0)
1654 {
1655 char errbuf[1024];
1656 ERROR ("setsockopt: %s",
1657 sstrerror (errno, errbuf, sizeof (errbuf)));
1658 return (-1);
1659 }
1661 return (0);
1662 }
1663 }
1664 else if (ai->ai_family == AF_INET6)
1665 {
1666 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1668 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1669 {
1670 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1671 &se->interface,
1672 sizeof (se->interface)) != 0)
1673 {
1674 char errbuf[1024];
1675 ERROR ("setsockopt: %s",
1676 sstrerror (errno, errbuf,
1677 sizeof (errbuf)));
1678 return (-1);
1679 }
1681 return (0);
1682 }
1683 }
1685 /* else: Not a multicast interface. */
1686 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1687 if (se->interface != 0)
1688 {
1689 char interface_name[IFNAMSIZ];
1691 if (if_indextoname (se->interface, interface_name) == NULL)
1692 return (-1);
1694 DEBUG ("network plugin: Binding socket to interface %s", interface_name);
1696 if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
1697 interface_name,
1698 sizeof(interface_name)) == -1 )
1699 {
1700 char errbuf[1024];
1701 ERROR ("setsockopt: %s",
1702 sstrerror (errno, errbuf, sizeof (errbuf)));
1703 return (-1);
1704 }
1705 }
1706 /* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1708 #else
1709 WARNING ("network plugin: Cannot set the interface on a unicast "
1710 "socket because "
1711 # if !defined(SO_BINDTODEVICE)
1712 "the the \"SO_BINDTODEVICE\" socket option "
1713 # else
1714 "the \"if_indextoname\" function "
1715 # endif
1716 "is not available on your system.");
1717 #endif
1719 return (0);
1720 } /* }}} network_set_interface */
1722 static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
1723 {
1724 int loop = 0;
1725 int yes = 1;
1727 /* allow multiple sockets to use the same PORT number */
1728 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1729 &yes, sizeof(yes)) == -1) {
1730 char errbuf[1024];
1731 ERROR ("setsockopt: %s",
1732 sstrerror (errno, errbuf, sizeof (errbuf)));
1733 return (-1);
1734 }
1736 DEBUG ("fd = %i; calling `bind'", fd);
1738 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1739 {
1740 char errbuf[1024];
1741 ERROR ("bind: %s",
1742 sstrerror (errno, errbuf, sizeof (errbuf)));
1743 return (-1);
1744 }
1746 if (ai->ai_family == AF_INET)
1747 {
1748 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1749 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1750 {
1751 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1752 struct ip_mreqn mreq;
1753 #else
1754 struct ip_mreq mreq;
1755 #endif
1757 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1759 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1760 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1761 /* Set the interface using the interface index if
1762 * possible (available). Unfortunately, the struct
1763 * ip_mreqn is not portable. */
1764 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1765 mreq.imr_ifindex = interface_idx;
1766 #else
1767 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1768 #endif
1770 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1771 &loop, sizeof (loop)) == -1)
1772 {
1773 char errbuf[1024];
1774 ERROR ("setsockopt: %s",
1775 sstrerror (errno, errbuf,
1776 sizeof (errbuf)));
1777 return (-1);
1778 }
1780 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1781 &mreq, sizeof (mreq)) == -1)
1782 {
1783 char errbuf[1024];
1784 ERROR ("setsockopt: %s",
1785 sstrerror (errno, errbuf,
1786 sizeof (errbuf)));
1787 return (-1);
1788 }
1790 return (0);
1791 }
1792 }
1793 else if (ai->ai_family == AF_INET6)
1794 {
1795 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1796 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1797 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1798 {
1799 struct ipv6_mreq mreq;
1801 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1803 memcpy (&mreq.ipv6mr_multiaddr,
1804 &addr->sin6_addr,
1805 sizeof (addr->sin6_addr));
1807 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1808 * ipv6mr_interface may be set to zeroes to
1809 * choose the default multicast interface or to
1810 * the index of a particular multicast-capable
1811 * interface if the host is multihomed.
1812 * Membership is associ-associated with a
1813 * single interface; programs running on
1814 * multihomed hosts may need to join the same
1815 * group on more than one interface.*/
1816 mreq.ipv6mr_interface = interface_idx;
1818 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1819 &loop, sizeof (loop)) == -1)
1820 {
1821 char errbuf[1024];
1822 ERROR ("setsockopt: %s",
1823 sstrerror (errno, errbuf,
1824 sizeof (errbuf)));
1825 return (-1);
1826 }
1828 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1829 &mreq, sizeof (mreq)) == -1)
1830 {
1831 char errbuf[1024];
1832 ERROR ("setsockopt: %s",
1833 sstrerror (errno, errbuf,
1834 sizeof (errbuf)));
1835 return (-1);
1836 }
1838 return (0);
1839 }
1840 }
1842 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1843 /* if a specific interface was set, bind the socket to it. But to avoid
1844 * possible problems with multicast routing, only do that for non-multicast
1845 * addresses */
1846 if (interface_idx != 0)
1847 {
1848 char interface_name[IFNAMSIZ];
1850 if (if_indextoname (interface_idx, interface_name) == NULL)
1851 return (-1);
1853 DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
1855 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
1856 interface_name,
1857 sizeof(interface_name)) == -1 )
1858 {
1859 char errbuf[1024];
1860 ERROR ("setsockopt: %s",
1861 sstrerror (errno, errbuf, sizeof (errbuf)));
1862 return (-1);
1863 }
1864 }
1865 #endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1867 return (0);
1868 } /* int network_bind_socket */
1870 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
1871 * or `SOCKENT_TYPE_SERVER' */
1872 static int sockent_init (sockent_t *se, int type) /* {{{ */
1873 {
1874 if (se == NULL)
1875 return (-1);
1877 memset (se, 0, sizeof (*se));
1879 se->type = SOCKENT_TYPE_CLIENT;
1880 se->node = NULL;
1881 se->service = NULL;
1882 se->interface = 0;
1883 se->next = NULL;
1885 if (type == SOCKENT_TYPE_SERVER)
1886 {
1887 se->type = SOCKENT_TYPE_SERVER;
1888 se->data.server.fd = NULL;
1889 #if HAVE_LIBGCRYPT
1890 se->data.server.security_level = SECURITY_LEVEL_NONE;
1891 se->data.server.auth_file = NULL;
1892 se->data.server.userdb = NULL;
1893 se->data.server.cypher = NULL;
1894 #endif
1895 }
1896 else
1897 {
1898 se->data.client.fd = -1;
1899 se->data.client.addr = NULL;
1900 #if HAVE_LIBGCRYPT
1901 se->data.client.security_level = SECURITY_LEVEL_NONE;
1902 se->data.client.username = NULL;
1903 se->data.client.password = NULL;
1904 se->data.client.cypher = NULL;
1905 #endif
1906 }
1908 return (0);
1909 } /* }}} int sockent_init */
1911 /* Open the file descriptors for a initialized sockent structure. */
1912 static int sockent_open (sockent_t *se) /* {{{ */
1913 {
1914 struct addrinfo ai_hints;
1915 struct addrinfo *ai_list, *ai_ptr;
1916 int ai_return;
1918 const char *node;
1919 const char *service;
1921 if (se == NULL)
1922 return (-1);
1924 /* Set up the security structures. */
1925 #if HAVE_LIBGCRYPT /* {{{ */
1926 if (se->type == SOCKENT_TYPE_CLIENT)
1927 {
1928 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
1929 {
1930 if ((se->data.client.username == NULL)
1931 || (se->data.client.password == NULL))
1932 {
1933 ERROR ("network plugin: Client socket with "
1934 "security requested, but no "
1935 "credentials are configured.");
1936 return (-1);
1937 }
1938 gcry_md_hash_buffer (GCRY_MD_SHA256,
1939 se->data.client.password_hash,
1940 se->data.client.password,
1941 strlen (se->data.client.password));
1942 }
1943 }
1944 else /* (se->type == SOCKENT_TYPE_SERVER) */
1945 {
1946 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
1947 {
1948 if (se->data.server.auth_file == NULL)
1949 {
1950 ERROR ("network plugin: Server socket with "
1951 "security requested, but no "
1952 "password file is configured.");
1953 return (-1);
1954 }
1955 }
1956 if (se->data.server.auth_file != NULL)
1957 {
1958 se->data.server.userdb = fbh_create (se->data.server.auth_file);
1959 if (se->data.server.userdb == NULL)
1960 {
1961 ERROR ("network plugin: Reading password file "
1962 "`%s' failed.",
1963 se->data.server.auth_file);
1964 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
1965 return (-1);
1966 }
1967 }
1968 }
1969 #endif /* }}} HAVE_LIBGCRYPT */
1971 node = se->node;
1972 service = se->service;
1974 if (service == NULL)
1975 service = NET_DEFAULT_PORT;
1977 DEBUG ("network plugin: sockent_open: node = %s; service = %s;",
1978 node, service);
1980 memset (&ai_hints, 0, sizeof (ai_hints));
1981 ai_hints.ai_flags = 0;
1982 #ifdef AI_PASSIVE
1983 ai_hints.ai_flags |= AI_PASSIVE;
1984 #endif
1985 #ifdef AI_ADDRCONFIG
1986 ai_hints.ai_flags |= AI_ADDRCONFIG;
1987 #endif
1988 ai_hints.ai_family = AF_UNSPEC;
1989 ai_hints.ai_socktype = SOCK_DGRAM;
1990 ai_hints.ai_protocol = IPPROTO_UDP;
1992 ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
1993 if (ai_return != 0)
1994 {
1995 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
1996 (se->node == NULL) ? "(null)" : se->node,
1997 (se->service == NULL) ? "(null)" : se->service,
1998 gai_strerror (ai_return));
1999 return (-1);
2000 }
2002 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2003 {
2004 int status;
2006 if (se->type == SOCKENT_TYPE_SERVER) /* {{{ */
2007 {
2008 int *tmp;
2010 tmp = realloc (se->data.server.fd,
2011 sizeof (*tmp) * (se->data.server.fd_num + 1));
2012 if (tmp == NULL)
2013 {
2014 ERROR ("network plugin: realloc failed.");
2015 continue;
2016 }
2017 se->data.server.fd = tmp;
2018 tmp = se->data.server.fd + se->data.server.fd_num;
2020 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
2021 ai_ptr->ai_protocol);
2022 if (*tmp < 0)
2023 {
2024 char errbuf[1024];
2025 ERROR ("network plugin: socket(2) failed: %s",
2026 sstrerror (errno, errbuf,
2027 sizeof (errbuf)));
2028 continue;
2029 }
2031 status = network_bind_socket (*tmp, ai_ptr, se->interface);
2032 if (status != 0)
2033 {
2034 close (*tmp);
2035 *tmp = -1;
2036 continue;
2037 }
2039 se->data.server.fd_num++;
2040 continue;
2041 } /* }}} if (se->type == SOCKENT_TYPE_SERVER) */
2042 else /* if (se->type == SOCKENT_TYPE_CLIENT) {{{ */
2043 {
2044 se->data.client.fd = socket (ai_ptr->ai_family,
2045 ai_ptr->ai_socktype,
2046 ai_ptr->ai_protocol);
2047 if (se->data.client.fd < 0)
2048 {
2049 char errbuf[1024];
2050 ERROR ("network plugin: socket(2) failed: %s",
2051 sstrerror (errno, errbuf,
2052 sizeof (errbuf)));
2053 continue;
2054 }
2056 se->data.client.addr = malloc (sizeof (*se->data.client.addr));
2057 if (se->data.client.addr == NULL)
2058 {
2059 ERROR ("network plugin: malloc failed.");
2060 close (se->data.client.fd);
2061 se->data.client.fd = -1;
2062 continue;
2063 }
2065 memset (se->data.client.addr, 0, sizeof (*se->data.client.addr));
2066 assert (sizeof (*se->data.client.addr) >= ai_ptr->ai_addrlen);
2067 memcpy (se->data.client.addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2068 se->data.client.addrlen = ai_ptr->ai_addrlen;
2070 network_set_ttl (se, ai_ptr);
2071 network_set_interface (se, ai_ptr);
2073 /* We don't open more than one write-socket per
2074 * node/service pair.. */
2075 break;
2076 } /* }}} if (se->type == SOCKENT_TYPE_CLIENT) */
2077 } /* for (ai_list) */
2079 freeaddrinfo (ai_list);
2081 /* Check if all went well. */
2082 if (se->type == SOCKENT_TYPE_SERVER)
2083 {
2084 if (se->data.server.fd_num <= 0)
2085 return (-1);
2086 }
2087 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2088 {
2089 if (se->data.client.fd < 0)
2090 return (-1);
2091 }
2093 return (0);
2094 } /* }}} int sockent_open */
2096 /* Add a sockent to the global list of sockets */
2097 static int sockent_add (sockent_t *se) /* {{{ */
2098 {
2099 sockent_t *last_ptr;
2101 if (se == NULL)
2102 return (-1);
2104 if (se->type == SOCKENT_TYPE_SERVER)
2105 {
2106 struct pollfd *tmp;
2107 size_t i;
2109 tmp = realloc (listen_sockets_pollfd,
2110 sizeof (*tmp) * (listen_sockets_num
2111 + se->data.server.fd_num));
2112 if (tmp == NULL)
2113 {
2114 ERROR ("network plugin: realloc failed.");
2115 return (-1);
2116 }
2117 listen_sockets_pollfd = tmp;
2118 tmp = listen_sockets_pollfd + listen_sockets_num;
2120 for (i = 0; i < se->data.server.fd_num; i++)
2121 {
2122 memset (tmp + i, 0, sizeof (*tmp));
2123 tmp[i].fd = se->data.server.fd[i];
2124 tmp[i].events = POLLIN | POLLPRI;
2125 tmp[i].revents = 0;
2126 }
2128 listen_sockets_num += se->data.server.fd_num;
2130 if (listen_sockets == NULL)
2131 {
2132 listen_sockets = se;
2133 return (0);
2134 }
2135 last_ptr = listen_sockets;
2136 }
2137 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2138 {
2139 if (sending_sockets == NULL)
2140 {
2141 sending_sockets = se;
2142 return (0);
2143 }
2144 last_ptr = sending_sockets;
2145 }
2147 while (last_ptr->next != NULL)
2148 last_ptr = last_ptr->next;
2149 last_ptr->next = se;
2151 return (0);
2152 } /* }}} int sockent_add */
2154 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
2155 {
2156 while (42)
2157 {
2158 receive_list_entry_t *ent;
2159 sockent_t *se;
2161 /* Lock and wait for more data to come in */
2162 pthread_mutex_lock (&receive_list_lock);
2163 while ((listen_loop == 0)
2164 && (receive_list_head == NULL))
2165 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
2167 /* Remove the head entry and unlock */
2168 ent = receive_list_head;
2169 if (ent != NULL)
2170 receive_list_head = ent->next;
2171 receive_list_length--;
2172 pthread_mutex_unlock (&receive_list_lock);
2174 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2175 * because we dispatch all missing packets before shutting down. */
2176 if (ent == NULL)
2177 break;
2179 /* Look for the correct `sockent_t' */
2180 se = listen_sockets;
2181 while (se != NULL)
2182 {
2183 size_t i;
2185 for (i = 0; i < se->data.server.fd_num; i++)
2186 if (se->data.server.fd[i] == ent->fd)
2187 break;
2189 if (i < se->data.server.fd_num)
2190 break;
2192 se = se->next;
2193 }
2195 if (se == NULL)
2196 {
2197 ERROR ("network plugin: Got packet from FD %i, but can't "
2198 "find an appropriate socket entry.",
2199 ent->fd);
2200 sfree (ent->data);
2201 sfree (ent);
2202 continue;
2203 }
2205 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0,
2206 /* username = */ NULL);
2207 sfree (ent->data);
2208 sfree (ent);
2209 } /* while (42) */
2211 return (NULL);
2212 } /* }}} void *dispatch_thread */
2214 static int network_receive (void) /* {{{ */
2215 {
2216 char buffer[network_config_packet_size];
2217 int buffer_len;
2219 int i;
2220 int status;
2222 receive_list_entry_t *private_list_head;
2223 receive_list_entry_t *private_list_tail;
2224 uint64_t private_list_length;
2226 assert (listen_sockets_num > 0);
2228 private_list_head = NULL;
2229 private_list_tail = NULL;
2230 private_list_length = 0;
2232 while (listen_loop == 0)
2233 {
2234 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2236 if (status <= 0)
2237 {
2238 char errbuf[1024];
2239 if (errno == EINTR)
2240 continue;
2241 ERROR ("poll failed: %s",
2242 sstrerror (errno, errbuf, sizeof (errbuf)));
2243 return (-1);
2244 }
2246 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2247 {
2248 receive_list_entry_t *ent;
2250 if ((listen_sockets_pollfd[i].revents
2251 & (POLLIN | POLLPRI)) == 0)
2252 continue;
2253 status--;
2255 buffer_len = recv (listen_sockets_pollfd[i].fd,
2256 buffer, sizeof (buffer),
2257 0 /* no flags */);
2258 if (buffer_len < 0)
2259 {
2260 char errbuf[1024];
2261 ERROR ("recv failed: %s",
2262 sstrerror (errno, errbuf,
2263 sizeof (errbuf)));
2264 return (-1);
2265 }
2267 stats_octets_rx += ((uint64_t) buffer_len);
2268 stats_packets_rx++;
2270 /* TODO: Possible performance enhancement: Do not free
2271 * these entries in the dispatch thread but put them in
2272 * another list, so we don't have to allocate more and
2273 * more of these structures. */
2274 ent = malloc (sizeof (receive_list_entry_t));
2275 if (ent == NULL)
2276 {
2277 ERROR ("network plugin: malloc failed.");
2278 return (-1);
2279 }
2280 memset (ent, 0, sizeof (receive_list_entry_t));
2281 ent->data = malloc (network_config_packet_size);
2282 if (ent->data == NULL)
2283 {
2284 sfree (ent);
2285 ERROR ("network plugin: malloc failed.");
2286 return (-1);
2287 }
2288 ent->fd = listen_sockets_pollfd[i].fd;
2289 ent->next = NULL;
2291 memcpy (ent->data, buffer, buffer_len);
2292 ent->data_len = buffer_len;
2294 if (private_list_head == NULL)
2295 private_list_head = ent;
2296 else
2297 private_list_tail->next = ent;
2298 private_list_tail = ent;
2299 private_list_length++;
2301 /* Do not block here. Blocking here has led to
2302 * insufficient performance in the past. */
2303 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2304 {
2305 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2306 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2308 if (receive_list_head == NULL)
2309 receive_list_head = private_list_head;
2310 else
2311 receive_list_tail->next = private_list_head;
2312 receive_list_tail = private_list_tail;
2313 receive_list_length += private_list_length;
2315 pthread_cond_signal (&receive_list_cond);
2316 pthread_mutex_unlock (&receive_list_lock);
2318 private_list_head = NULL;
2319 private_list_tail = NULL;
2320 private_list_length = 0;
2321 }
2322 } /* for (listen_sockets_pollfd) */
2323 } /* while (listen_loop == 0) */
2325 /* Make sure everything is dispatched before exiting. */
2326 if (private_list_head != NULL)
2327 {
2328 pthread_mutex_lock (&receive_list_lock);
2330 if (receive_list_head == NULL)
2331 receive_list_head = private_list_head;
2332 else
2333 receive_list_tail->next = private_list_head;
2334 receive_list_tail = private_list_tail;
2335 receive_list_length += private_list_length;
2337 private_list_head = NULL;
2338 private_list_tail = NULL;
2339 private_list_length = 0;
2341 pthread_cond_signal (&receive_list_cond);
2342 pthread_mutex_unlock (&receive_list_lock);
2343 }
2345 return (0);
2346 } /* }}} int network_receive */
2348 static void *receive_thread (void __attribute__((unused)) *arg)
2349 {
2350 return (network_receive () ? (void *) 1 : (void *) 0);
2351 } /* void *receive_thread */
2353 static void network_init_buffer (void)
2354 {
2355 memset (send_buffer, 0, network_config_packet_size);
2356 send_buffer_ptr = send_buffer;
2357 send_buffer_fill = 0;
2359 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2360 } /* int network_init_buffer */
2362 static void networt_send_buffer_plain (const sockent_t *se, /* {{{ */
2363 const char *buffer, size_t buffer_size)
2364 {
2365 int status;
2367 while (42)
2368 {
2369 status = sendto (se->data.client.fd, buffer, buffer_size,
2370 /* flags = */ 0,
2371 (struct sockaddr *) se->data.client.addr,
2372 se->data.client.addrlen);
2373 if (status < 0)
2374 {
2375 char errbuf[1024];
2376 if (errno == EINTR)
2377 continue;
2378 ERROR ("network plugin: sendto failed: %s",
2379 sstrerror (errno, errbuf,
2380 sizeof (errbuf)));
2381 break;
2382 }
2384 break;
2385 } /* while (42) */
2386 } /* }}} void networt_send_buffer_plain */
2388 #if HAVE_LIBGCRYPT
2389 #define BUFFER_ADD(p,s) do { \
2390 memcpy (buffer + buffer_offset, (p), (s)); \
2391 buffer_offset += (s); \
2392 } while (0)
2394 static void networt_send_buffer_signed (const sockent_t *se, /* {{{ */
2395 const char *in_buffer, size_t in_buffer_size)
2396 {
2397 part_signature_sha256_t ps;
2398 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2399 size_t buffer_offset;
2400 size_t username_len;
2402 gcry_md_hd_t hd;
2403 gcry_error_t err;
2404 unsigned char *hash;
2406 hd = NULL;
2407 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2408 if (err != 0)
2409 {
2410 ERROR ("network plugin: Creating HMAC object failed: %s",
2411 gcry_strerror (err));
2412 return;
2413 }
2415 err = gcry_md_setkey (hd, se->data.client.password,
2416 strlen (se->data.client.password));
2417 if (err != 0)
2418 {
2419 ERROR ("network plugin: gcry_md_setkey failed: %s",
2420 gcry_strerror (err));
2421 gcry_md_close (hd);
2422 return;
2423 }
2425 username_len = strlen (se->data.client.username);
2426 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2427 {
2428 ERROR ("network plugin: Username too long: %s",
2429 se->data.client.username);
2430 return;
2431 }
2433 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2434 se->data.client.username, username_len);
2435 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2436 in_buffer, in_buffer_size);
2438 /* Initialize the `ps' structure. */
2439 memset (&ps, 0, sizeof (ps));
2440 ps.head.type = htons (TYPE_SIGN_SHA256);
2441 ps.head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len);
2443 /* Calculate the hash value. */
2444 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2445 username_len + in_buffer_size);
2446 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2447 if (hash == NULL)
2448 {
2449 ERROR ("network plugin: gcry_md_read failed.");
2450 gcry_md_close (hd);
2451 return;
2452 }
2453 memcpy (ps.hash, hash, sizeof (ps.hash));
2455 /* Add the header */
2456 buffer_offset = 0;
2458 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2459 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2460 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2462 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2464 gcry_md_close (hd);
2465 hd = NULL;
2467 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2468 networt_send_buffer_plain (se, buffer, buffer_offset);
2469 } /* }}} void networt_send_buffer_signed */
2471 static void networt_send_buffer_encrypted (sockent_t *se, /* {{{ */
2472 const char *in_buffer, size_t in_buffer_size)
2473 {
2474 part_encryption_aes256_t pea;
2475 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2476 size_t buffer_size;
2477 size_t buffer_offset;
2478 size_t header_size;
2479 size_t username_len;
2480 gcry_error_t err;
2481 gcry_cipher_hd_t cypher;
2483 /* Initialize the header fields */
2484 memset (&pea, 0, sizeof (pea));
2485 pea.head.type = htons (TYPE_ENCR_AES256);
2487 pea.username = se->data.client.username;
2489 username_len = strlen (pea.username);
2490 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2491 {
2492 ERROR ("network plugin: Username too long: %s", pea.username);
2493 return;
2494 }
2496 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2497 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2498 - sizeof (pea.hash);
2500 assert (buffer_size <= sizeof (buffer));
2501 DEBUG ("network plugin: networt_send_buffer_encrypted: "
2502 "buffer_size = %zu;", buffer_size);
2504 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2505 + username_len + in_buffer_size));
2506 pea.username_length = htons ((uint16_t) username_len);
2508 /* Chose a random initialization vector. */
2509 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2511 /* Create hash of the payload */
2512 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2514 /* Initialize the buffer */
2515 buffer_offset = 0;
2516 memset (buffer, 0, sizeof (buffer));
2519 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2520 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2521 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2522 BUFFER_ADD (pea.username, username_len);
2523 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2524 assert (buffer_offset == header_size);
2525 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2526 BUFFER_ADD (in_buffer, in_buffer_size);
2528 assert (buffer_offset == buffer_size);
2530 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2531 se->data.client.password);
2532 if (cypher == NULL)
2533 return;
2535 /* Encrypt the buffer in-place */
2536 err = gcry_cipher_encrypt (cypher,
2537 buffer + header_size,
2538 buffer_size - header_size,
2539 /* in = */ NULL, /* in len = */ 0);
2540 if (err != 0)
2541 {
2542 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2543 gcry_strerror (err));
2544 return;
2545 }
2547 /* Send it out without further modifications */
2548 networt_send_buffer_plain (se, buffer, buffer_size);
2549 } /* }}} void networt_send_buffer_encrypted */
2550 #undef BUFFER_ADD
2551 #endif /* HAVE_LIBGCRYPT */
2553 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2554 {
2555 sockent_t *se;
2557 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2559 for (se = sending_sockets; se != NULL; se = se->next)
2560 {
2561 #if HAVE_LIBGCRYPT
2562 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2563 networt_send_buffer_encrypted (se, buffer, buffer_len);
2564 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2565 networt_send_buffer_signed (se, buffer, buffer_len);
2566 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2567 #endif /* HAVE_LIBGCRYPT */
2568 networt_send_buffer_plain (se, buffer, buffer_len);
2569 } /* for (sending_sockets) */
2570 } /* }}} void network_send_buffer */
2572 static int add_to_buffer (char *buffer, int buffer_size, /* {{{ */
2573 value_list_t *vl_def,
2574 const data_set_t *ds, const value_list_t *vl)
2575 {
2576 char *buffer_orig = buffer;
2578 if (strcmp (vl_def->host, vl->host) != 0)
2579 {
2580 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2581 vl->host, strlen (vl->host)) != 0)
2582 return (-1);
2583 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2584 }
2586 if (vl_def->time != vl->time)
2587 {
2588 if (write_part_number (&buffer, &buffer_size, TYPE_TIME,
2589 (uint64_t) vl->time))
2590 return (-1);
2591 vl_def->time = vl->time;
2592 }
2594 if (vl_def->interval != vl->interval)
2595 {
2596 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL,
2597 (uint64_t) vl->interval))
2598 return (-1);
2599 vl_def->interval = vl->interval;
2600 }
2602 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2603 {
2604 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2605 vl->plugin, strlen (vl->plugin)) != 0)
2606 return (-1);
2607 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2608 }
2610 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2611 {
2612 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2613 vl->plugin_instance,
2614 strlen (vl->plugin_instance)) != 0)
2615 return (-1);
2616 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2617 }
2619 if (strcmp (vl_def->type, vl->type) != 0)
2620 {
2621 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2622 vl->type, strlen (vl->type)) != 0)
2623 return (-1);
2624 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2625 }
2627 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2628 {
2629 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2630 vl->type_instance,
2631 strlen (vl->type_instance)) != 0)
2632 return (-1);
2633 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2634 }
2636 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2637 return (-1);
2639 return (buffer - buffer_orig);
2640 } /* }}} int add_to_buffer */
2642 static void flush_buffer (void)
2643 {
2644 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2645 send_buffer_fill);
2647 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2649 stats_octets_tx += ((uint64_t) send_buffer_fill);
2650 stats_packets_tx++;
2652 network_init_buffer ();
2653 }
2655 static int network_write (const data_set_t *ds, const value_list_t *vl,
2656 user_data_t __attribute__((unused)) *user_data)
2657 {
2658 int status;
2660 if (!check_send_okay (vl))
2661 {
2662 #if COLLECT_DEBUG
2663 char name[6*DATA_MAX_NAME_LEN];
2664 FORMAT_VL (name, sizeof (name), vl);
2665 name[sizeof (name) - 1] = 0;
2666 DEBUG ("network plugin: network_write: "
2667 "NOT sending %s.", name);
2668 #endif
2669 /* Counter is not protected by another lock and may be reached by
2670 * multiple threads */
2671 pthread_mutex_lock (&stats_lock);
2672 stats_values_not_sent++;
2673 pthread_mutex_unlock (&stats_lock);
2674 return (0);
2675 }
2677 uc_meta_data_add_unsigned_int (vl,
2678 "network:time_sent", (uint64_t) vl->time);
2680 pthread_mutex_lock (&send_buffer_lock);
2682 status = add_to_buffer (send_buffer_ptr,
2683 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2684 &send_buffer_vl,
2685 ds, vl);
2686 if (status >= 0)
2687 {
2688 /* status == bytes added to the buffer */
2689 send_buffer_fill += status;
2690 send_buffer_ptr += status;
2692 stats_values_sent++;
2693 }
2694 else
2695 {
2696 flush_buffer ();
2698 status = add_to_buffer (send_buffer_ptr,
2699 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2700 &send_buffer_vl,
2701 ds, vl);
2703 if (status >= 0)
2704 {
2705 send_buffer_fill += status;
2706 send_buffer_ptr += status;
2708 stats_values_sent++;
2709 }
2710 }
2712 if (status < 0)
2713 {
2714 ERROR ("network plugin: Unable to append to the "
2715 "buffer for some weird reason");
2716 }
2717 else if ((network_config_packet_size - send_buffer_fill) < 15)
2718 {
2719 flush_buffer ();
2720 }
2722 pthread_mutex_unlock (&send_buffer_lock);
2724 return ((status < 0) ? -1 : 0);
2725 } /* int network_write */
2727 static int network_config_set_boolean (const oconfig_item_t *ci, /* {{{ */
2728 int *retval)
2729 {
2730 if ((ci->values_num != 1)
2731 || ((ci->values[0].type != OCONFIG_TYPE_BOOLEAN)
2732 && (ci->values[0].type != OCONFIG_TYPE_STRING)))
2733 {
2734 ERROR ("network plugin: The `%s' config option needs "
2735 "exactly one boolean argument.", ci->key);
2736 return (-1);
2737 }
2739 if (ci->values[0].type == OCONFIG_TYPE_BOOLEAN)
2740 {
2741 if (ci->values[0].value.boolean)
2742 *retval = 1;
2743 else
2744 *retval = 0;
2745 }
2746 else
2747 {
2748 char *str = ci->values[0].value.string;
2750 if (IS_TRUE (str))
2751 *retval = 1;
2752 else if (IS_FALSE (str))
2753 *retval = 0;
2754 else
2755 {
2756 ERROR ("network plugin: Cannot parse string value `%s' of the `%s' "
2757 "option as boolean value.",
2758 str, ci->key);
2759 return (-1);
2760 }
2761 }
2763 return (0);
2764 } /* }}} int network_config_set_boolean */
2766 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2767 {
2768 int tmp;
2769 if ((ci->values_num != 1)
2770 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2771 {
2772 WARNING ("network plugin: The `TimeToLive' config option needs exactly "
2773 "one numeric argument.");
2774 return (-1);
2775 }
2777 tmp = (int) ci->values[0].value.number;
2778 if ((tmp > 0) && (tmp <= 255))
2779 network_config_ttl = tmp;
2781 return (0);
2782 } /* }}} int network_config_set_ttl */
2784 static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
2785 int *interface)
2786 {
2787 if ((ci->values_num != 1)
2788 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2789 {
2790 WARNING ("network plugin: The `Interface' config option needs exactly "
2791 "one string argument.");
2792 return (-1);
2793 }
2795 if (interface == NULL)
2796 return (-1);
2798 *interface = if_nametoindex (ci->values[0].value.string);
2800 return (0);
2801 } /* }}} int network_config_set_interface */
2803 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
2804 {
2805 int tmp;
2806 if ((ci->values_num != 1)
2807 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2808 {
2809 WARNING ("network plugin: The `MaxPacketSize' config option needs exactly "
2810 "one numeric argument.");
2811 return (-1);
2812 }
2814 tmp = (int) ci->values[0].value.number;
2815 if ((tmp >= 1024) && (tmp <= 65535))
2816 network_config_packet_size = tmp;
2818 return (0);
2819 } /* }}} int network_config_set_buffer_size */
2821 #if HAVE_LIBGCRYPT
2822 static int network_config_set_string (const oconfig_item_t *ci, /* {{{ */
2823 char **ret_string)
2824 {
2825 char *tmp;
2826 if ((ci->values_num != 1)
2827 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2828 {
2829 WARNING ("network plugin: The `%s' config option needs exactly "
2830 "one string argument.", ci->key);
2831 return (-1);
2832 }
2834 tmp = strdup (ci->values[0].value.string);
2835 if (tmp == NULL)
2836 return (-1);
2838 sfree (*ret_string);
2839 *ret_string = tmp;
2841 return (0);
2842 } /* }}} int network_config_set_string */
2843 #endif /* HAVE_LIBGCRYPT */
2845 #if HAVE_LIBGCRYPT
2846 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
2847 int *retval)
2848 {
2849 char *str;
2850 if ((ci->values_num != 1)
2851 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2852 {
2853 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
2854 "one string argument.");
2855 return (-1);
2856 }
2858 str = ci->values[0].value.string;
2859 if (strcasecmp ("Encrypt", str) == 0)
2860 *retval = SECURITY_LEVEL_ENCRYPT;
2861 else if (strcasecmp ("Sign", str) == 0)
2862 *retval = SECURITY_LEVEL_SIGN;
2863 else if (strcasecmp ("None", str) == 0)
2864 *retval = SECURITY_LEVEL_NONE;
2865 else
2866 {
2867 WARNING ("network plugin: Unknown security level: %s.", str);
2868 return (-1);
2869 }
2871 return (0);
2872 } /* }}} int network_config_set_security_level */
2873 #endif /* HAVE_LIBGCRYPT */
2875 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
2876 {
2877 sockent_t *se;
2878 int status;
2879 int i;
2881 if ((ci->values_num < 1) || (ci->values_num > 2)
2882 || (ci->values[0].type != OCONFIG_TYPE_STRING)
2883 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
2884 {
2885 ERROR ("network plugin: The `%s' config option needs "
2886 "one or two string arguments.", ci->key);
2887 return (-1);
2888 }
2890 se = malloc (sizeof (*se));
2891 if (se == NULL)
2892 {
2893 ERROR ("network plugin: malloc failed.");
2894 return (-1);
2895 }
2896 sockent_init (se, SOCKENT_TYPE_SERVER);
2898 se->node = strdup (ci->values[0].value.string);
2899 if (ci->values_num >= 2)
2900 se->service = strdup (ci->values[1].value.string);
2902 for (i = 0; i < ci->children_num; i++)
2903 {
2904 oconfig_item_t *child = ci->children + i;
2906 #if HAVE_LIBGCRYPT
2907 if (strcasecmp ("AuthFile", child->key) == 0)
2908 network_config_set_string (child, &se->data.server.auth_file);
2909 else if (strcasecmp ("SecurityLevel", child->key) == 0)
2910 network_config_set_security_level (child,
2911 &se->data.server.security_level);
2912 else
2913 #endif /* HAVE_LIBGCRYPT */
2914 if (strcasecmp ("Interface", child->key) == 0)
2915 network_config_set_interface (child,
2916 &se->interface);
2917 else
2918 {
2919 WARNING ("network plugin: Option `%s' is not allowed here.",
2920 child->key);
2921 }
2922 }
2924 #if HAVE_LIBGCRYPT
2925 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
2926 && (se->data.server.auth_file == NULL))
2927 {
2928 ERROR ("network plugin: A security level higher than `none' was "
2929 "requested, but no AuthFile option was given. Cowardly refusing to "
2930 "open this socket!");
2931 sockent_destroy (se);
2932 return (-1);
2933 }
2934 #endif /* HAVE_LIBGCRYPT */
2936 status = sockent_open (se);
2937 if (status != 0)
2938 {
2939 ERROR ("network plugin: network_config_add_listen: sockent_open failed.");
2940 sockent_destroy (se);
2941 return (-1);
2942 }
2944 status = sockent_add (se);
2945 if (status != 0)
2946 {
2947 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
2948 sockent_destroy (se);
2949 return (-1);
2950 }
2952 return (0);
2953 } /* }}} int network_config_add_listen */
2955 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
2956 {
2957 sockent_t *se;
2958 int status;
2959 int i;
2961 if ((ci->values_num < 1) || (ci->values_num > 2)
2962 || (ci->values[0].type != OCONFIG_TYPE_STRING)
2963 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
2964 {
2965 ERROR ("network plugin: The `%s' config option needs "
2966 "one or two string arguments.", ci->key);
2967 return (-1);
2968 }
2970 se = malloc (sizeof (*se));
2971 if (se == NULL)
2972 {
2973 ERROR ("network plugin: malloc failed.");
2974 return (-1);
2975 }
2976 sockent_init (se, SOCKENT_TYPE_CLIENT);
2978 se->node = strdup (ci->values[0].value.string);
2979 if (ci->values_num >= 2)
2980 se->service = strdup (ci->values[1].value.string);
2982 for (i = 0; i < ci->children_num; i++)
2983 {
2984 oconfig_item_t *child = ci->children + i;
2986 #if HAVE_LIBGCRYPT
2987 if (strcasecmp ("Username", child->key) == 0)
2988 network_config_set_string (child, &se->data.client.username);
2989 else if (strcasecmp ("Password", child->key) == 0)
2990 network_config_set_string (child, &se->data.client.password);
2991 else if (strcasecmp ("SecurityLevel", child->key) == 0)
2992 network_config_set_security_level (child,
2993 &se->data.client.security_level);
2994 else
2995 #endif /* HAVE_LIBGCRYPT */
2996 if (strcasecmp ("Interface", child->key) == 0)
2997 network_config_set_interface (child,
2998 &se->interface);
2999 else
3000 {
3001 WARNING ("network plugin: Option `%s' is not allowed here.",
3002 child->key);
3003 }
3004 }
3006 #if HAVE_LIBGCRYPT
3007 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
3008 && ((se->data.client.username == NULL)
3009 || (se->data.client.password == NULL)))
3010 {
3011 ERROR ("network plugin: A security level higher than `none' was "
3012 "requested, but no Username or Password option was given. "
3013 "Cowardly refusing to open this socket!");
3014 sockent_destroy (se);
3015 return (-1);
3016 }
3017 #endif /* HAVE_LIBGCRYPT */
3019 status = sockent_open (se);
3020 if (status != 0)
3021 {
3022 ERROR ("network plugin: network_config_add_server: sockent_open failed.");
3023 sockent_destroy (se);
3024 return (-1);
3025 }
3027 status = sockent_add (se);
3028 if (status != 0)
3029 {
3030 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
3031 sockent_destroy (se);
3032 return (-1);
3033 }
3035 return (0);
3036 } /* }}} int network_config_add_server */
3038 static int network_config (oconfig_item_t *ci) /* {{{ */
3039 {
3040 int i;
3042 for (i = 0; i < ci->children_num; i++)
3043 {
3044 oconfig_item_t *child = ci->children + i;
3046 if (strcasecmp ("Listen", child->key) == 0)
3047 network_config_add_listen (child);
3048 else if (strcasecmp ("Server", child->key) == 0)
3049 network_config_add_server (child);
3050 else if (strcasecmp ("TimeToLive", child->key) == 0)
3051 network_config_set_ttl (child);
3052 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
3053 network_config_set_buffer_size (child);
3054 else if (strcasecmp ("Forward", child->key) == 0)
3055 network_config_set_boolean (child, &network_config_forward);
3056 else if (strcasecmp ("ReportStats", child->key) == 0)
3057 network_config_set_boolean (child, &network_config_stats);
3058 else if (strcasecmp ("CacheFlush", child->key) == 0)
3059 /* no op for backwards compatibility only */;
3060 else
3061 {
3062 WARNING ("network plugin: Option `%s' is not allowed here.",
3063 child->key);
3064 }
3065 }
3067 return (0);
3068 } /* }}} int network_config */
3070 static int network_notification (const notification_t *n,
3071 user_data_t __attribute__((unused)) *user_data)
3072 {
3073 char buffer[network_config_packet_size];
3074 char *buffer_ptr = buffer;
3075 int buffer_free = sizeof (buffer);
3076 int status;
3078 memset (buffer, '\0', sizeof (buffer));
3081 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME,
3082 (uint64_t) n->time);
3083 if (status != 0)
3084 return (-1);
3086 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
3087 (uint64_t) n->severity);
3088 if (status != 0)
3089 return (-1);
3091 if (strlen (n->host) > 0)
3092 {
3093 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
3094 n->host, strlen (n->host));
3095 if (status != 0)
3096 return (-1);
3097 }
3099 if (strlen (n->plugin) > 0)
3100 {
3101 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
3102 n->plugin, strlen (n->plugin));
3103 if (status != 0)
3104 return (-1);
3105 }
3107 if (strlen (n->plugin_instance) > 0)
3108 {
3109 status = write_part_string (&buffer_ptr, &buffer_free,
3110 TYPE_PLUGIN_INSTANCE,
3111 n->plugin_instance, strlen (n->plugin_instance));
3112 if (status != 0)
3113 return (-1);
3114 }
3116 if (strlen (n->type) > 0)
3117 {
3118 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3119 n->type, strlen (n->type));
3120 if (status != 0)
3121 return (-1);
3122 }
3124 if (strlen (n->type_instance) > 0)
3125 {
3126 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3127 n->type_instance, strlen (n->type_instance));
3128 if (status != 0)
3129 return (-1);
3130 }
3132 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3133 n->message, strlen (n->message));
3134 if (status != 0)
3135 return (-1);
3137 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3139 return (0);
3140 } /* int network_notification */
3142 static int network_shutdown (void)
3143 {
3144 listen_loop++;
3146 /* Kill the listening thread */
3147 if (receive_thread_running != 0)
3148 {
3149 INFO ("network plugin: Stopping receive thread.");
3150 pthread_kill (receive_thread_id, SIGTERM);
3151 pthread_join (receive_thread_id, NULL /* no return value */);
3152 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3153 receive_thread_running = 0;
3154 }
3156 /* Shutdown the dispatching thread */
3157 if (dispatch_thread_running != 0)
3158 {
3159 INFO ("network plugin: Stopping dispatch thread.");
3160 pthread_mutex_lock (&receive_list_lock);
3161 pthread_cond_broadcast (&receive_list_cond);
3162 pthread_mutex_unlock (&receive_list_lock);
3163 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3164 dispatch_thread_running = 0;
3165 }
3167 sockent_destroy (listen_sockets);
3169 if (send_buffer_fill > 0)
3170 flush_buffer ();
3172 sfree (send_buffer);
3174 /* TODO: Close `sending_sockets' */
3176 plugin_unregister_config ("network");
3177 plugin_unregister_init ("network");
3178 plugin_unregister_write ("network");
3179 plugin_unregister_shutdown ("network");
3181 return (0);
3182 } /* int network_shutdown */
3184 static int network_stats_read (void) /* {{{ */
3185 {
3186 uint64_t copy_octets_rx;
3187 uint64_t copy_octets_tx;
3188 uint64_t copy_packets_rx;
3189 uint64_t copy_packets_tx;
3190 uint64_t copy_values_dispatched;
3191 uint64_t copy_values_not_dispatched;
3192 uint64_t copy_values_sent;
3193 uint64_t copy_values_not_sent;
3194 uint64_t copy_receive_list_length;
3195 value_list_t vl = VALUE_LIST_INIT;
3196 value_t values[2];
3198 copy_octets_rx = stats_octets_rx;
3199 copy_octets_tx = stats_octets_tx;
3200 copy_packets_rx = stats_packets_rx;
3201 copy_packets_tx = stats_packets_tx;
3202 copy_values_dispatched = stats_values_dispatched;
3203 copy_values_not_dispatched = stats_values_not_dispatched;
3204 copy_values_sent = stats_values_sent;
3205 copy_values_not_sent = stats_values_not_sent;
3206 copy_receive_list_length = receive_list_length;
3208 /* Initialize `vl' */
3209 vl.values = values;
3210 vl.values_len = 2;
3211 vl.time = 0;
3212 vl.interval = interval_g;
3213 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3214 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3216 /* Octets received / sent */
3217 vl.values[0].counter = (counter_t) copy_octets_rx;
3218 vl.values[1].counter = (counter_t) copy_octets_tx;
3219 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3220 plugin_dispatch_values (&vl);
3222 /* Packets received / send */
3223 vl.values[0].counter = (counter_t) copy_packets_rx;
3224 vl.values[1].counter = (counter_t) copy_packets_tx;
3225 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3226 plugin_dispatch_values (&vl);
3228 /* Values (not) dispatched and (not) send */
3229 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3230 vl.values_len = 1;
3232 vl.values[0].derive = (derive_t) copy_values_dispatched;
3233 sstrncpy (vl.type_instance, "dispatch-accepted",
3234 sizeof (vl.type_instance));
3235 plugin_dispatch_values (&vl);
3237 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3238 sstrncpy (vl.type_instance, "dispatch-rejected",
3239 sizeof (vl.type_instance));
3240 plugin_dispatch_values (&vl);
3242 vl.values[0].derive = (derive_t) copy_values_sent;
3243 sstrncpy (vl.type_instance, "send-accepted",
3244 sizeof (vl.type_instance));
3245 plugin_dispatch_values (&vl);
3247 vl.values[0].derive = (derive_t) copy_values_not_sent;
3248 sstrncpy (vl.type_instance, "send-rejected",
3249 sizeof (vl.type_instance));
3250 plugin_dispatch_values (&vl);
3252 /* Receive queue length */
3253 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3254 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3255 vl.type_instance[0] = 0;
3256 plugin_dispatch_values (&vl);
3258 return (0);
3259 } /* }}} int network_stats_read */
3261 static int network_init (void)
3262 {
3263 static _Bool have_init = false;
3265 /* Check if we were already initialized. If so, just return - there's
3266 * nothing more to do (for now, that is). */
3267 if (have_init)
3268 return (0);
3269 have_init = true;
3271 #if HAVE_LIBGCRYPT
3272 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
3273 gcry_control (GCRYCTL_INIT_SECMEM, 32768, 0);
3274 gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
3275 #endif
3277 if (network_config_stats != 0)
3278 plugin_register_read ("network", network_stats_read);
3280 plugin_register_shutdown ("network", network_shutdown);
3282 send_buffer = malloc (network_config_packet_size);
3283 if (send_buffer == NULL)
3284 {
3285 ERROR ("network plugin: malloc failed.");
3286 return (-1);
3287 }
3288 network_init_buffer ();
3290 /* setup socket(s) and so on */
3291 if (sending_sockets != NULL)
3292 {
3293 plugin_register_write ("network", network_write,
3294 /* user_data = */ NULL);
3295 plugin_register_notification ("network", network_notification,
3296 /* user_data = */ NULL);
3297 }
3299 /* If no threads need to be started, return here. */
3300 if ((listen_sockets_num == 0)
3301 || ((dispatch_thread_running != 0)
3302 && (receive_thread_running != 0)))
3303 return (0);
3305 if (dispatch_thread_running == 0)
3306 {
3307 int status;
3308 status = pthread_create (&dispatch_thread_id,
3309 NULL /* no attributes */,
3310 dispatch_thread,
3311 NULL /* no argument */);
3312 if (status != 0)
3313 {
3314 char errbuf[1024];
3315 ERROR ("network: pthread_create failed: %s",
3316 sstrerror (errno, errbuf,
3317 sizeof (errbuf)));
3318 }
3319 else
3320 {
3321 dispatch_thread_running = 1;
3322 }
3323 }
3325 if (receive_thread_running == 0)
3326 {
3327 int status;
3328 status = pthread_create (&receive_thread_id,
3329 NULL /* no attributes */,
3330 receive_thread,
3331 NULL /* no argument */);
3332 if (status != 0)
3333 {
3334 char errbuf[1024];
3335 ERROR ("network: pthread_create failed: %s",
3336 sstrerror (errno, errbuf,
3337 sizeof (errbuf)));
3338 }
3339 else
3340 {
3341 receive_thread_running = 1;
3342 }
3343 }
3345 return (0);
3346 } /* int network_init */
3348 /*
3349 * The flush option of the network plugin cannot flush individual identifiers.
3350 * All the values are added to a buffer and sent when the buffer is full, the
3351 * requested value may or may not be in there, it's not worth finding out. We
3352 * just send the buffer if `flush' is called - if the requested value was in
3353 * there, good. If not, well, then there is nothing to flush.. -octo
3354 */
3355 static int network_flush (int timeout,
3356 const char __attribute__((unused)) *identifier,
3357 user_data_t __attribute__((unused)) *user_data)
3358 {
3359 pthread_mutex_lock (&send_buffer_lock);
3361 if (send_buffer_fill > 0)
3362 flush_buffer ();
3364 pthread_mutex_unlock (&send_buffer_lock);
3366 return (0);
3367 } /* int network_flush */
3369 void module_register (void)
3370 {
3371 plugin_register_complex_config ("network", network_config);
3372 plugin_register_init ("network", network_init);
3373 plugin_register_flush ("network", network_flush,
3374 /* user_data = */ NULL);
3375 } /* void module_register */
3377 /* vim: set fdm=marker : */