1 /**
2 * collectd - src/network.c
3 * Copyright (C) 2005-2009 Florian octo Forster
4 * Copyright (C) 2009 Aman Gupta
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU Lesser General Public License as published by
8 * the Free Software Foundation; only version 2.1 of the License is
9 * applicable.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 * Authors:
21 * Florian octo Forster <octo at verplant.org>
22 * Aman Gupta <aman at tmm1.net>
23 **/
25 #define _BSD_SOURCE /* For struct ip_mreq */
27 #include "collectd.h"
28 #include "plugin.h"
29 #include "common.h"
30 #include "configfile.h"
31 #include "utils_fbhash.h"
32 #include "utils_avltree.h"
33 #include "utils_cache.h"
35 #include "network.h"
37 #if HAVE_PTHREAD_H
38 # include <pthread.h>
39 #endif
40 #if HAVE_SYS_SOCKET_H
41 # include <sys/socket.h>
42 #endif
43 #if HAVE_NETDB_H
44 # include <netdb.h>
45 #endif
46 #if HAVE_NETINET_IN_H
47 # include <netinet/in.h>
48 #endif
49 #if HAVE_ARPA_INET_H
50 # include <arpa/inet.h>
51 #endif
52 #if HAVE_POLL_H
53 # include <poll.h>
54 #endif
55 #if HAVE_NET_IF_H
56 # include <net/if.h>
57 #endif
59 #if HAVE_LIBGCRYPT
60 # include <gcrypt.h>
61 GCRY_THREAD_OPTION_PTHREAD_IMPL;
62 #endif
64 #ifndef IPV6_ADD_MEMBERSHIP
65 # ifdef IPV6_JOIN_GROUP
66 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
67 # else
68 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
69 # endif
70 #endif /* !IP_ADD_MEMBERSHIP */
72 /*
73 * Maximum size required for encryption / signing:
74 *
75 * 42 bytes for the encryption header
76 * + 64 bytes for the username
77 * -----------
78 * = 106 bytes
79 */
80 #define BUFF_SIG_SIZE 106
82 /*
83 * Private data types
84 */
85 #define SECURITY_LEVEL_NONE 0
86 #if HAVE_LIBGCRYPT
87 # define SECURITY_LEVEL_SIGN 1
88 # define SECURITY_LEVEL_ENCRYPT 2
89 #endif
90 struct sockent_client
91 {
92 int fd;
93 struct sockaddr_storage *addr;
94 socklen_t addrlen;
95 #if HAVE_LIBGCRYPT
96 int security_level;
97 char *username;
98 char *password;
99 gcry_cipher_hd_t cypher;
100 unsigned char password_hash[32];
101 #endif
102 };
104 struct sockent_server
105 {
106 int *fd;
107 size_t fd_num;
108 #if HAVE_LIBGCRYPT
109 int security_level;
110 char *auth_file;
111 fbhash_t *userdb;
112 gcry_cipher_hd_t cypher;
113 #endif
114 };
116 typedef struct sockent
117 {
118 #define SOCKENT_TYPE_CLIENT 1
119 #define SOCKENT_TYPE_SERVER 2
120 int type;
122 char *node;
123 char *service;
125 union
126 {
127 struct sockent_client client;
128 struct sockent_server server;
129 } data;
131 struct sockent *next;
132 } sockent_t;
134 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
135 * 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
136 * +-------+-----------------------+-------------------------------+
137 * ! Ver. ! ! Length !
138 * +-------+-----------------------+-------------------------------+
139 */
140 struct part_header_s
141 {
142 uint16_t type;
143 uint16_t length;
144 };
145 typedef struct part_header_s part_header_t;
147 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
148 * 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
149 * +-------------------------------+-------------------------------+
150 * ! Type ! Length !
151 * +-------------------------------+-------------------------------+
152 * : (Length - 4) Bytes :
153 * +---------------------------------------------------------------+
154 */
155 struct part_string_s
156 {
157 part_header_t *head;
158 char *value;
159 };
160 typedef struct part_string_s part_string_t;
162 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
163 * 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
164 * +-------------------------------+-------------------------------+
165 * ! Type ! Length !
166 * +-------------------------------+-------------------------------+
167 * : (Length - 4 == 2 || 4 || 8) Bytes :
168 * +---------------------------------------------------------------+
169 */
170 struct part_number_s
171 {
172 part_header_t *head;
173 uint64_t *value;
174 };
175 typedef struct part_number_s part_number_t;
177 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
178 * 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
179 * +-------------------------------+-------------------------------+
180 * ! Type ! Length !
181 * +-------------------------------+---------------+---------------+
182 * ! Num of values ! Type0 ! Type1 !
183 * +-------------------------------+---------------+---------------+
184 * ! Value0 !
185 * ! !
186 * +---------------------------------------------------------------+
187 * ! Value1 !
188 * ! !
189 * +---------------------------------------------------------------+
190 */
191 struct part_values_s
192 {
193 part_header_t *head;
194 uint16_t *num_values;
195 uint8_t *values_types;
196 value_t *values;
197 };
198 typedef struct part_values_s part_values_t;
200 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
201 * 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
202 * +-------------------------------+-------------------------------+
203 * ! Type ! Length !
204 * +-------------------------------+-------------------------------+
205 * ! Hash (Bits 0 - 31) !
206 * : : :
207 * ! Hash (Bits 224 - 255) !
208 * +---------------------------------------------------------------+
209 */
210 /* Minimum size */
211 #define PART_SIGNATURE_SHA256_SIZE 36
212 struct part_signature_sha256_s
213 {
214 part_header_t head;
215 unsigned char hash[32];
216 char *username;
217 };
218 typedef struct part_signature_sha256_s part_signature_sha256_t;
220 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
221 * 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
222 * +-------------------------------+-------------------------------+
223 * ! Type ! Length !
224 * +-------------------------------+-------------------------------+
225 * ! Original length ! Padding (0 - 15 bytes) !
226 * +-------------------------------+-------------------------------+
227 * ! Hash (Bits 0 - 31) !
228 * : : :
229 * ! Hash (Bits 128 - 159) !
230 * +---------------------------------------------------------------+
231 */
232 /* Minimum size */
233 #define PART_ENCRYPTION_AES256_SIZE 42
234 struct part_encryption_aes256_s
235 {
236 part_header_t head;
237 uint16_t username_length;
238 char *username;
239 unsigned char iv[16];
240 /* <encrypted> */
241 unsigned char hash[20];
242 /* <payload /> */
243 /* </encrypted> */
244 };
245 typedef struct part_encryption_aes256_s part_encryption_aes256_t;
247 struct receive_list_entry_s
248 {
249 char *data;
250 int data_len;
251 int fd;
252 struct receive_list_entry_s *next;
253 };
254 typedef struct receive_list_entry_s receive_list_entry_t;
256 /*
257 * Private variables
258 */
259 static int network_config_ttl = 0;
260 static int network_config_interface_idx = 0;
261 static size_t network_config_packet_size = 1024;
262 static int network_config_forward = 0;
263 static int network_config_stats = 0;
265 static sockent_t *sending_sockets = NULL;
267 static receive_list_entry_t *receive_list_head = NULL;
268 static receive_list_entry_t *receive_list_tail = NULL;
269 static pthread_mutex_t receive_list_lock = PTHREAD_MUTEX_INITIALIZER;
270 static pthread_cond_t receive_list_cond = PTHREAD_COND_INITIALIZER;
271 static uint64_t receive_list_length = 0;
273 static sockent_t *listen_sockets = NULL;
274 static struct pollfd *listen_sockets_pollfd = NULL;
275 static size_t listen_sockets_num = 0;
277 /* The receive and dispatch threads will run as long as `listen_loop' is set to
278 * zero. */
279 static int listen_loop = 0;
280 static int receive_thread_running = 0;
281 static pthread_t receive_thread_id;
282 static int dispatch_thread_running = 0;
283 static pthread_t dispatch_thread_id;
285 /* Buffer in which to-be-sent network packets are constructed. */
286 static char *send_buffer;
287 static char *send_buffer_ptr;
288 static int send_buffer_fill;
289 static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
290 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
292 /* XXX: These counters are incremented from one place only. The spot in which
293 * the values are incremented is either only reachable by one thread (the
294 * dispatch thread, for example) or locked by some lock (send_buffer_lock for
295 * example). Only if neither is true, the stats_lock is acquired. The counters
296 * are always read without holding a lock in the hope that writing 8 bytes to
297 * memory is an atomic operation. */
298 static uint64_t stats_octets_rx = 0;
299 static uint64_t stats_octets_tx = 0;
300 static uint64_t stats_packets_rx = 0;
301 static uint64_t stats_packets_tx = 0;
302 static uint64_t stats_values_dispatched = 0;
303 static uint64_t stats_values_not_dispatched = 0;
304 static uint64_t stats_values_sent = 0;
305 static uint64_t stats_values_not_sent = 0;
306 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
308 /*
309 * Private functions
310 */
311 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
312 {
313 uint64_t time_sent = 0;
314 int status;
316 status = uc_meta_data_get_unsigned_int (vl,
317 "network:time_sent", &time_sent);
319 /* This is a value we already sent. Don't allow it to be received again in
320 * order to avoid looping. */
321 if ((status == 0) && (time_sent >= ((uint64_t) vl->time)))
322 return (false);
324 return (true);
325 } /* }}} _Bool check_receive_okay */
327 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
328 {
329 _Bool received = false;
330 int status;
332 if (network_config_forward != 0)
333 return (true);
335 if (vl->meta == NULL)
336 return (true);
338 status = meta_data_get_boolean (vl->meta, "network:received", &received);
339 if (status == -ENOENT)
340 return (true);
341 else if (status != 0)
342 {
343 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
344 "with status %i.", status);
345 return (true);
346 }
348 /* By default, only *send* value lists that were not *received* by the
349 * network plugin. */
350 return (!received);
351 } /* }}} _Bool check_send_okay */
353 static int network_dispatch_values (value_list_t *vl) /* {{{ */
354 {
355 int status;
357 if ((vl->time <= 0)
358 || (strlen (vl->host) <= 0)
359 || (strlen (vl->plugin) <= 0)
360 || (strlen (vl->type) <= 0))
361 return (-EINVAL);
363 if (!check_receive_okay (vl))
364 {
365 #if COLLECT_DEBUG
366 char name[6*DATA_MAX_NAME_LEN];
367 FORMAT_VL (name, sizeof (name), vl);
368 name[sizeof (name) - 1] = 0;
369 DEBUG ("network plugin: network_dispatch_values: "
370 "NOT dispatching %s.", name);
371 #endif
372 stats_values_not_dispatched++;
373 return (0);
374 }
376 assert (vl->meta == NULL);
378 vl->meta = meta_data_create ();
379 if (vl->meta == NULL)
380 {
381 ERROR ("network plugin: meta_data_create failed.");
382 return (-ENOMEM);
383 }
385 status = meta_data_add_boolean (vl->meta, "network:received", true);
386 if (status != 0)
387 {
388 ERROR ("network plugin: meta_data_add_boolean failed.");
389 meta_data_destroy (vl->meta);
390 vl->meta = NULL;
391 return (status);
392 }
394 plugin_dispatch_values (vl);
395 stats_values_dispatched++;
397 meta_data_destroy (vl->meta);
398 vl->meta = NULL;
400 return (0);
401 } /* }}} int network_dispatch_values */
403 #if HAVE_LIBGCRYPT
404 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
405 const void *iv, size_t iv_size, const char *username)
406 {
407 gcry_error_t err;
408 gcry_cipher_hd_t *cyper_ptr;
409 unsigned char password_hash[32];
411 if (se->type == SOCKENT_TYPE_CLIENT)
412 {
413 cyper_ptr = &se->data.client.cypher;
414 memcpy (password_hash, se->data.client.password_hash,
415 sizeof (password_hash));
416 }
417 else
418 {
419 char *secret;
421 cyper_ptr = &se->data.server.cypher;
423 if (username == NULL)
424 return (NULL);
426 secret = fbh_get (se->data.server.userdb, username);
427 if (secret == NULL)
428 return (NULL);
430 gcry_md_hash_buffer (GCRY_MD_SHA256,
431 password_hash,
432 secret, strlen (secret));
434 sfree (secret);
435 }
437 if (*cyper_ptr == NULL)
438 {
439 err = gcry_cipher_open (cyper_ptr,
440 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
441 if (err != 0)
442 {
443 ERROR ("network plugin: gcry_cipher_open returned: %s",
444 gcry_strerror (err));
445 *cyper_ptr = NULL;
446 return (NULL);
447 }
448 }
449 else
450 {
451 gcry_cipher_reset (*cyper_ptr);
452 }
453 assert (*cyper_ptr != NULL);
455 err = gcry_cipher_setkey (*cyper_ptr,
456 password_hash, sizeof (password_hash));
457 if (err != 0)
458 {
459 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
460 gcry_strerror (err));
461 gcry_cipher_close (*cyper_ptr);
462 *cyper_ptr = NULL;
463 return (NULL);
464 }
466 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
467 if (err != 0)
468 {
469 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
470 gcry_strerror (err));
471 gcry_cipher_close (*cyper_ptr);
472 *cyper_ptr = NULL;
473 return (NULL);
474 }
476 return (*cyper_ptr);
477 } /* }}} int network_get_aes256_cypher */
478 #endif /* HAVE_LIBGCRYPT */
480 static int write_part_values (char **ret_buffer, int *ret_buffer_len,
481 const data_set_t *ds, const value_list_t *vl)
482 {
483 char *packet_ptr;
484 int packet_len;
485 int num_values;
487 part_header_t pkg_ph;
488 uint16_t pkg_num_values;
489 uint8_t *pkg_values_types;
490 value_t *pkg_values;
492 int offset;
493 int i;
495 num_values = vl->values_len;
496 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
497 + (num_values * sizeof (uint8_t))
498 + (num_values * sizeof (value_t));
500 if (*ret_buffer_len < packet_len)
501 return (-1);
503 pkg_values_types = (uint8_t *) malloc (num_values * sizeof (uint8_t));
504 if (pkg_values_types == NULL)
505 {
506 ERROR ("network plugin: write_part_values: malloc failed.");
507 return (-1);
508 }
510 pkg_values = (value_t *) malloc (num_values * sizeof (value_t));
511 if (pkg_values == NULL)
512 {
513 free (pkg_values_types);
514 ERROR ("network plugin: write_part_values: malloc failed.");
515 return (-1);
516 }
518 pkg_ph.type = htons (TYPE_VALUES);
519 pkg_ph.length = htons (packet_len);
521 pkg_num_values = htons ((uint16_t) vl->values_len);
523 for (i = 0; i < num_values; i++)
524 {
525 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
526 switch (ds->ds[i].type)
527 {
528 case DS_TYPE_COUNTER:
529 pkg_values[i].counter = htonll (vl->values[i].counter);
530 break;
532 case DS_TYPE_GAUGE:
533 pkg_values[i].gauge = htond (vl->values[i].gauge);
534 break;
536 case DS_TYPE_DERIVE:
537 pkg_values[i].derive = htonll (vl->values[i].derive);
538 break;
540 case DS_TYPE_ABSOLUTE:
541 pkg_values[i].absolute = htonll (vl->values[i].absolute);
542 break;
544 default:
545 free (pkg_values_types);
546 free (pkg_values);
547 ERROR ("network plugin: write_part_values: "
548 "Unknown data source type: %i",
549 ds->ds[i].type);
550 return (-1);
551 } /* switch (ds->ds[i].type) */
552 } /* for (num_values) */
554 /*
555 * Use `memcpy' to write everything to the buffer, because the pointer
556 * may be unaligned and some architectures, such as SPARC, can't handle
557 * that.
558 */
559 packet_ptr = *ret_buffer;
560 offset = 0;
561 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
562 offset += sizeof (pkg_ph);
563 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
564 offset += sizeof (pkg_num_values);
565 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
566 offset += num_values * sizeof (uint8_t);
567 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
568 offset += num_values * sizeof (value_t);
570 assert (offset == packet_len);
572 *ret_buffer = packet_ptr + packet_len;
573 *ret_buffer_len -= packet_len;
575 free (pkg_values_types);
576 free (pkg_values);
578 return (0);
579 } /* int write_part_values */
581 static int write_part_number (char **ret_buffer, int *ret_buffer_len,
582 int type, uint64_t value)
583 {
584 char *packet_ptr;
585 int packet_len;
587 part_header_t pkg_head;
588 uint64_t pkg_value;
590 int offset;
592 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
594 if (*ret_buffer_len < packet_len)
595 return (-1);
597 pkg_head.type = htons (type);
598 pkg_head.length = htons (packet_len);
599 pkg_value = htonll (value);
601 packet_ptr = *ret_buffer;
602 offset = 0;
603 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
604 offset += sizeof (pkg_head);
605 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
606 offset += sizeof (pkg_value);
608 assert (offset == packet_len);
610 *ret_buffer = packet_ptr + packet_len;
611 *ret_buffer_len -= packet_len;
613 return (0);
614 } /* int write_part_number */
616 static int write_part_string (char **ret_buffer, int *ret_buffer_len,
617 int type, const char *str, int str_len)
618 {
619 char *buffer;
620 int buffer_len;
622 uint16_t pkg_type;
623 uint16_t pkg_length;
625 int offset;
627 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
628 if (*ret_buffer_len < buffer_len)
629 return (-1);
631 pkg_type = htons (type);
632 pkg_length = htons (buffer_len);
634 buffer = *ret_buffer;
635 offset = 0;
636 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
637 offset += sizeof (pkg_type);
638 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
639 offset += sizeof (pkg_length);
640 memcpy (buffer + offset, str, str_len);
641 offset += str_len;
642 memset (buffer + offset, '\0', 1);
643 offset += 1;
645 assert (offset == buffer_len);
647 *ret_buffer = buffer + buffer_len;
648 *ret_buffer_len -= buffer_len;
650 return (0);
651 } /* int write_part_string */
653 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
654 value_t **ret_values, int *ret_num_values)
655 {
656 char *buffer = *ret_buffer;
657 size_t buffer_len = *ret_buffer_len;
659 uint16_t tmp16;
660 size_t exp_size;
661 int i;
663 uint16_t pkg_length;
664 uint16_t pkg_type;
665 uint16_t pkg_numval;
667 uint8_t *pkg_types;
668 value_t *pkg_values;
670 if (buffer_len < 15)
671 {
672 NOTICE ("network plugin: packet is too short: "
673 "buffer_len = %zu", buffer_len);
674 return (-1);
675 }
677 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
678 buffer += sizeof (tmp16);
679 pkg_type = ntohs (tmp16);
681 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
682 buffer += sizeof (tmp16);
683 pkg_length = ntohs (tmp16);
685 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
686 buffer += sizeof (tmp16);
687 pkg_numval = ntohs (tmp16);
689 assert (pkg_type == TYPE_VALUES);
691 exp_size = 3 * sizeof (uint16_t)
692 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
693 if ((buffer_len < 0) || (buffer_len < exp_size))
694 {
695 WARNING ("network plugin: parse_part_values: "
696 "Packet too short: "
697 "Chunk of size %zu expected, "
698 "but buffer has only %zu bytes left.",
699 exp_size, buffer_len);
700 return (-1);
701 }
703 if (pkg_length != exp_size)
704 {
705 WARNING ("network plugin: parse_part_values: "
706 "Length and number of values "
707 "in the packet don't match.");
708 return (-1);
709 }
711 pkg_types = (uint8_t *) malloc (pkg_numval * sizeof (uint8_t));
712 pkg_values = (value_t *) malloc (pkg_numval * sizeof (value_t));
713 if ((pkg_types == NULL) || (pkg_values == NULL))
714 {
715 sfree (pkg_types);
716 sfree (pkg_values);
717 ERROR ("network plugin: parse_part_values: malloc failed.");
718 return (-1);
719 }
721 memcpy ((void *) pkg_types, (void *) buffer, pkg_numval * sizeof (uint8_t));
722 buffer += pkg_numval * sizeof (uint8_t);
723 memcpy ((void *) pkg_values, (void *) buffer, pkg_numval * sizeof (value_t));
724 buffer += pkg_numval * sizeof (value_t);
726 for (i = 0; i < pkg_numval; i++)
727 {
728 switch (pkg_types[i])
729 {
730 case DS_TYPE_COUNTER:
731 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
732 break;
734 case DS_TYPE_GAUGE:
735 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
736 break;
738 case DS_TYPE_DERIVE:
739 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
740 break;
742 case DS_TYPE_ABSOLUTE:
743 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
744 break;
746 default:
747 sfree (pkg_types);
748 sfree (pkg_values);
749 NOTICE ("network plugin: parse_part_values: "
750 "Don't know how to handle data source type %"PRIu8,
751 pkg_types[i]);
752 return (-1);
753 } /* switch (pkg_types[i]) */
754 }
756 *ret_buffer = buffer;
757 *ret_buffer_len = buffer_len - pkg_length;
758 *ret_num_values = pkg_numval;
759 *ret_values = pkg_values;
761 sfree (pkg_types);
763 return (0);
764 } /* int parse_part_values */
766 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
767 uint64_t *value)
768 {
769 char *buffer = *ret_buffer;
770 size_t buffer_len = *ret_buffer_len;
772 uint16_t tmp16;
773 uint64_t tmp64;
774 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
776 uint16_t pkg_length;
777 uint16_t pkg_type;
779 if ((buffer_len < 0) || ((size_t) buffer_len < exp_size))
780 {
781 WARNING ("network plugin: parse_part_number: "
782 "Packet too short: "
783 "Chunk of size %zu expected, "
784 "but buffer has only %zu bytes left.",
785 exp_size, buffer_len);
786 return (-1);
787 }
789 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
790 buffer += sizeof (tmp16);
791 pkg_type = ntohs (tmp16);
793 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
794 buffer += sizeof (tmp16);
795 pkg_length = ntohs (tmp16);
797 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
798 buffer += sizeof (tmp64);
799 *value = ntohll (tmp64);
801 *ret_buffer = buffer;
802 *ret_buffer_len = buffer_len - pkg_length;
804 return (0);
805 } /* int parse_part_number */
807 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
808 char *output, int output_len)
809 {
810 char *buffer = *ret_buffer;
811 size_t buffer_len = *ret_buffer_len;
813 uint16_t tmp16;
814 size_t header_size = 2 * sizeof (uint16_t);
816 uint16_t pkg_length;
817 uint16_t pkg_type;
819 if ((buffer_len < 0) || (buffer_len < header_size))
820 {
821 WARNING ("network plugin: parse_part_string: "
822 "Packet too short: "
823 "Chunk of at least size %zu expected, "
824 "but buffer has only %zu bytes left.",
825 header_size, buffer_len);
826 return (-1);
827 }
829 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
830 buffer += sizeof (tmp16);
831 pkg_type = ntohs (tmp16);
833 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
834 buffer += sizeof (tmp16);
835 pkg_length = ntohs (tmp16);
837 /* Check that packet fits in the input buffer */
838 if (pkg_length > buffer_len)
839 {
840 WARNING ("network plugin: parse_part_string: "
841 "Packet too big: "
842 "Chunk of size %"PRIu16" received, "
843 "but buffer has only %zu bytes left.",
844 pkg_length, buffer_len);
845 return (-1);
846 }
848 /* Check that pkg_length is in the valid range */
849 if (pkg_length <= header_size)
850 {
851 WARNING ("network plugin: parse_part_string: "
852 "Packet too short: "
853 "Header claims this packet is only %hu "
854 "bytes long.", pkg_length);
855 return (-1);
856 }
858 /* Check that the package data fits into the output buffer.
859 * The previous if-statement ensures that:
860 * `pkg_length > header_size' */
861 if ((output_len < 0)
862 || ((size_t) output_len < ((size_t) pkg_length - header_size)))
863 {
864 WARNING ("network plugin: parse_part_string: "
865 "Output buffer too small.");
866 return (-1);
867 }
869 /* All sanity checks successfull, let's copy the data over */
870 output_len = pkg_length - header_size;
871 memcpy ((void *) output, (void *) buffer, output_len);
872 buffer += output_len;
874 /* For some very weird reason '\0' doesn't do the trick on SPARC in
875 * this statement. */
876 if (output[output_len - 1] != 0)
877 {
878 WARNING ("network plugin: parse_part_string: "
879 "Received string does not end "
880 "with a NULL-byte.");
881 return (-1);
882 }
884 *ret_buffer = buffer;
885 *ret_buffer_len = buffer_len - pkg_length;
887 return (0);
888 } /* int parse_part_string */
890 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
891 * parse_packet and vice versa. */
892 #define PP_SIGNED 0x01
893 #define PP_ENCRYPTED 0x02
894 static int parse_packet (sockent_t *se,
895 void *buffer, size_t buffer_size, int flags);
897 #define BUFFER_READ(p,s) do { \
898 memcpy ((p), buffer + buffer_offset, (s)); \
899 buffer_offset += (s); \
900 } while (0)
902 #if HAVE_LIBGCRYPT
903 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
904 void **ret_buffer, size_t *ret_buffer_len, int flags)
905 {
906 char *buffer;
907 size_t buffer_len;
908 size_t buffer_offset;
910 size_t username_len;
911 char *secret;
913 part_signature_sha256_t pss;
914 uint16_t pss_head_length;
915 char hash[sizeof (pss.hash)];
917 gcry_md_hd_t hd;
918 gcry_error_t err;
919 unsigned char *hash_ptr;
921 buffer = *ret_buffer;
922 buffer_len = *ret_buffer_len;
923 buffer_offset = 0;
925 if (se->data.server.userdb == NULL)
926 {
927 NOTICE ("network plugin: Received signed network packet but can't verify "
928 "it because no user DB has been configured. Will accept it.");
929 return (0);
930 }
932 /* Check if the buffer has enough data for this structure. */
933 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
934 return (-ENOMEM);
936 /* Read type and length header */
937 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
938 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
939 pss_head_length = ntohs (pss.head.length);
941 /* Check if the `pss_head_length' is within bounds. */
942 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
943 || (pss_head_length > buffer_len))
944 {
945 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
946 return (-1);
947 }
949 /* Copy the hash. */
950 BUFFER_READ (pss.hash, sizeof (pss.hash));
952 /* Calculate username length (without null byte) and allocate memory */
953 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
954 pss.username = malloc (username_len + 1);
955 if (pss.username == NULL)
956 return (-ENOMEM);
958 /* Read the username */
959 BUFFER_READ (pss.username, username_len);
960 pss.username[username_len] = 0;
962 assert (buffer_offset == pss_head_length);
964 /* Query the password */
965 secret = fbh_get (se->data.server.userdb, pss.username);
966 if (secret == NULL)
967 {
968 ERROR ("network plugin: Unknown user: %s", pss.username);
969 sfree (pss.username);
970 return (-ENOENT);
971 }
973 /* Create a hash device and check the HMAC */
974 hd = NULL;
975 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
976 if (err != 0)
977 {
978 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
979 gcry_strerror (err));
980 sfree (secret);
981 sfree (pss.username);
982 return (-1);
983 }
985 err = gcry_md_setkey (hd, secret, strlen (secret));
986 if (err != 0)
987 {
988 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
989 gcry_md_close (hd);
990 return (-1);
991 }
993 gcry_md_write (hd,
994 buffer + PART_SIGNATURE_SHA256_SIZE,
995 buffer_len - PART_SIGNATURE_SHA256_SIZE);
996 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
997 if (hash_ptr == NULL)
998 {
999 ERROR ("network plugin: gcry_md_read failed.");
1000 gcry_md_close (hd);
1001 sfree (secret);
1002 sfree (pss.username);
1003 return (-1);
1004 }
1005 memcpy (hash, hash_ptr, sizeof (hash));
1007 /* Clean up */
1008 gcry_md_close (hd);
1009 hd = NULL;
1011 sfree (secret);
1012 sfree (pss.username);
1014 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1015 {
1016 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1017 "Hash mismatch.");
1018 }
1019 else
1020 {
1021 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1022 flags | PP_SIGNED);
1023 }
1025 *ret_buffer = buffer + buffer_len;
1026 *ret_buffer_len = 0;
1028 return (0);
1029 } /* }}} int parse_part_sign_sha256 */
1030 /* #endif HAVE_LIBGCRYPT */
1032 #else /* if !HAVE_LIBGCRYPT */
1033 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1034 void **ret_buffer, size_t *ret_buffer_size, int flags)
1035 {
1036 static int warning_has_been_printed = 0;
1038 char *buffer;
1039 size_t buffer_size;
1040 size_t buffer_offset;
1041 uint16_t part_len;
1043 part_signature_sha256_t pss;
1045 buffer = *ret_buffer;
1046 buffer_size = *ret_buffer_size;
1047 buffer_offset = 0;
1049 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1050 return (-ENOMEM);
1052 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1053 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1054 part_len = ntohs (pss.head.length);
1056 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1057 || (part_len > buffer_size))
1058 return (-EINVAL);
1060 if (warning_has_been_printed == 0)
1061 {
1062 WARNING ("network plugin: Received signed packet, but the network "
1063 "plugin was not linked with libgcrypt, so I cannot "
1064 "verify the signature. The packet will be accepted.");
1065 warning_has_been_printed = 1;
1066 }
1068 parse_packet (se, buffer + part_len, buffer_size - part_len, flags);
1070 *ret_buffer = buffer + buffer_size;
1071 *ret_buffer_size = 0;
1073 return (0);
1074 } /* }}} int parse_part_sign_sha256 */
1075 #endif /* !HAVE_LIBGCRYPT */
1077 #if HAVE_LIBGCRYPT
1078 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1079 void **ret_buffer, size_t *ret_buffer_len,
1080 int flags)
1081 {
1082 char *buffer = *ret_buffer;
1083 size_t buffer_len = *ret_buffer_len;
1084 size_t payload_len;
1085 size_t part_size;
1086 size_t buffer_offset;
1087 uint16_t username_len;
1088 part_encryption_aes256_t pea;
1089 unsigned char hash[sizeof (pea.hash)];
1091 gcry_cipher_hd_t cypher;
1092 gcry_error_t err;
1094 /* Make sure at least the header if available. */
1095 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1096 {
1097 NOTICE ("network plugin: parse_part_encr_aes256: "
1098 "Discarding short packet.");
1099 return (-1);
1100 }
1102 buffer_offset = 0;
1104 /* Copy the unencrypted information into `pea'. */
1105 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1106 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1108 /* Check the `part size'. */
1109 part_size = ntohs (pea.head.length);
1110 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1111 || (part_size > buffer_len))
1112 {
1113 NOTICE ("network plugin: parse_part_encr_aes256: "
1114 "Discarding part with invalid size.");
1115 return (-1);
1116 }
1118 /* Read the username */
1119 BUFFER_READ (&username_len, sizeof (username_len));
1120 username_len = ntohs (username_len);
1122 if ((username_len <= 0)
1123 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1124 {
1125 NOTICE ("network plugin: parse_part_encr_aes256: "
1126 "Discarding part with invalid username length.");
1127 return (-1);
1128 }
1130 assert (username_len > 0);
1131 pea.username = malloc (username_len + 1);
1132 if (pea.username == NULL)
1133 return (-ENOMEM);
1134 BUFFER_READ (pea.username, username_len);
1135 pea.username[username_len] = 0;
1137 /* Last but not least, the initialization vector */
1138 BUFFER_READ (pea.iv, sizeof (pea.iv));
1140 /* Make sure we are at the right position */
1141 assert (buffer_offset == (username_len +
1142 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1144 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1145 pea.username);
1146 if (cypher == NULL)
1147 return (-1);
1149 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1150 assert (payload_len > 0);
1152 /* Decrypt the packet in-place */
1153 err = gcry_cipher_decrypt (cypher,
1154 buffer + buffer_offset,
1155 part_size - buffer_offset,
1156 /* in = */ NULL, /* in len = */ 0);
1157 if (err != 0)
1158 {
1159 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1160 gcry_strerror (err));
1161 return (-1);
1162 }
1164 /* Read the hash */
1165 BUFFER_READ (pea.hash, sizeof (pea.hash));
1167 /* Make sure we're at the right position - again */
1168 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1169 assert (buffer_offset == (part_size - payload_len));
1171 /* Check hash sum */
1172 memset (hash, 0, sizeof (hash));
1173 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1174 buffer + buffer_offset, payload_len);
1175 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1176 {
1177 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1178 return (-1);
1179 }
1181 parse_packet (se, buffer + buffer_offset, payload_len,
1182 flags | PP_ENCRYPTED);
1184 /* Update return values */
1185 *ret_buffer = buffer + part_size;
1186 *ret_buffer_len = buffer_len - part_size;
1188 return (0);
1189 } /* }}} int parse_part_encr_aes256 */
1190 /* #endif HAVE_LIBGCRYPT */
1192 #else /* if !HAVE_LIBGCRYPT */
1193 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1194 void **ret_buffer, size_t *ret_buffer_size, int flags)
1195 {
1196 static int warning_has_been_printed = 0;
1198 char *buffer;
1199 size_t buffer_size;
1200 size_t buffer_offset;
1202 part_header_t ph;
1203 size_t ph_length;
1205 buffer = *ret_buffer;
1206 buffer_size = *ret_buffer_size;
1207 buffer_offset = 0;
1209 /* parse_packet assures this minimum size. */
1210 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1212 BUFFER_READ (&ph.type, sizeof (ph.type));
1213 BUFFER_READ (&ph.length, sizeof (ph.length));
1214 ph_length = ntohs (ph.length);
1216 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1217 || (ph_length > buffer_size))
1218 {
1219 ERROR ("network plugin: AES-256 encrypted part "
1220 "with invalid length received.");
1221 return (-1);
1222 }
1224 if (warning_has_been_printed == 0)
1225 {
1226 WARNING ("network plugin: Received encrypted packet, but the network "
1227 "plugin was not linked with libgcrypt, so I cannot "
1228 "decrypt it. The part will be discarded.");
1229 warning_has_been_printed = 1;
1230 }
1232 *ret_buffer += ph_length;
1233 *ret_buffer_size -= ph_length;
1235 return (0);
1236 } /* }}} int parse_part_encr_aes256 */
1237 #endif /* !HAVE_LIBGCRYPT */
1239 #undef BUFFER_READ
1241 static int parse_packet (sockent_t *se, /* {{{ */
1242 void *buffer, size_t buffer_size, int flags)
1243 {
1244 int status;
1246 value_list_t vl = VALUE_LIST_INIT;
1247 notification_t n;
1249 #if HAVE_LIBGCRYPT
1250 int packet_was_signed = (flags & PP_SIGNED);
1251 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1252 int printed_ignore_warning = 0;
1253 #endif /* HAVE_LIBGCRYPT */
1256 memset (&vl, '\0', sizeof (vl));
1257 memset (&n, '\0', sizeof (n));
1258 status = 0;
1260 while ((status == 0) && (0 < buffer_size)
1261 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1262 {
1263 uint16_t pkg_length;
1264 uint16_t pkg_type;
1266 memcpy ((void *) &pkg_type,
1267 (void *) buffer,
1268 sizeof (pkg_type));
1269 memcpy ((void *) &pkg_length,
1270 (void *) (buffer + sizeof (pkg_type)),
1271 sizeof (pkg_length));
1273 pkg_length = ntohs (pkg_length);
1274 pkg_type = ntohs (pkg_type);
1276 if (pkg_length > buffer_size)
1277 break;
1278 /* Ensure that this loop terminates eventually */
1279 if (pkg_length < (2 * sizeof (uint16_t)))
1280 break;
1282 if (pkg_type == TYPE_ENCR_AES256)
1283 {
1284 status = parse_part_encr_aes256 (se,
1285 &buffer, &buffer_size, flags);
1286 if (status != 0)
1287 {
1288 ERROR ("network plugin: Decrypting AES256 "
1289 "part failed "
1290 "with status %i.", status);
1291 break;
1292 }
1293 }
1294 #if HAVE_LIBGCRYPT
1295 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1296 && (packet_was_encrypted == 0))
1297 {
1298 if (printed_ignore_warning == 0)
1299 {
1300 INFO ("network plugin: Unencrypted packet or "
1301 "part has been ignored.");
1302 printed_ignore_warning = 1;
1303 }
1304 buffer = ((char *) buffer) + pkg_length;
1305 continue;
1306 }
1307 #endif /* HAVE_LIBGCRYPT */
1308 else if (pkg_type == TYPE_SIGN_SHA256)
1309 {
1310 status = parse_part_sign_sha256 (se,
1311 &buffer, &buffer_size, flags);
1312 if (status != 0)
1313 {
1314 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1315 "signature failed "
1316 "with status %i.", status);
1317 break;
1318 }
1319 }
1320 #if HAVE_LIBGCRYPT
1321 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1322 && (packet_was_encrypted == 0)
1323 && (packet_was_signed == 0))
1324 {
1325 if (printed_ignore_warning == 0)
1326 {
1327 INFO ("network plugin: Unsigned packet or "
1328 "part has been ignored.");
1329 printed_ignore_warning = 1;
1330 }
1331 buffer = ((char *) buffer) + pkg_length;
1332 continue;
1333 }
1334 #endif /* HAVE_LIBGCRYPT */
1335 else if (pkg_type == TYPE_VALUES)
1336 {
1337 status = parse_part_values (&buffer, &buffer_size,
1338 &vl.values, &vl.values_len);
1339 if (status != 0)
1340 break;
1342 network_dispatch_values (&vl);
1344 sfree (vl.values);
1345 }
1346 else if (pkg_type == TYPE_TIME)
1347 {
1348 uint64_t tmp = 0;
1349 status = parse_part_number (&buffer, &buffer_size,
1350 &tmp);
1351 if (status == 0)
1352 {
1353 vl.time = (time_t) tmp;
1354 n.time = (time_t) tmp;
1355 }
1356 }
1357 else if (pkg_type == TYPE_INTERVAL)
1358 {
1359 uint64_t tmp = 0;
1360 status = parse_part_number (&buffer, &buffer_size,
1361 &tmp);
1362 if (status == 0)
1363 vl.interval = (int) tmp;
1364 }
1365 else if (pkg_type == TYPE_HOST)
1366 {
1367 status = parse_part_string (&buffer, &buffer_size,
1368 vl.host, sizeof (vl.host));
1369 if (status == 0)
1370 sstrncpy (n.host, vl.host, sizeof (n.host));
1371 }
1372 else if (pkg_type == TYPE_PLUGIN)
1373 {
1374 status = parse_part_string (&buffer, &buffer_size,
1375 vl.plugin, sizeof (vl.plugin));
1376 if (status == 0)
1377 sstrncpy (n.plugin, vl.plugin,
1378 sizeof (n.plugin));
1379 }
1380 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1381 {
1382 status = parse_part_string (&buffer, &buffer_size,
1383 vl.plugin_instance,
1384 sizeof (vl.plugin_instance));
1385 if (status == 0)
1386 sstrncpy (n.plugin_instance,
1387 vl.plugin_instance,
1388 sizeof (n.plugin_instance));
1389 }
1390 else if (pkg_type == TYPE_TYPE)
1391 {
1392 status = parse_part_string (&buffer, &buffer_size,
1393 vl.type, sizeof (vl.type));
1394 if (status == 0)
1395 sstrncpy (n.type, vl.type, sizeof (n.type));
1396 }
1397 else if (pkg_type == TYPE_TYPE_INSTANCE)
1398 {
1399 status = parse_part_string (&buffer, &buffer_size,
1400 vl.type_instance,
1401 sizeof (vl.type_instance));
1402 if (status == 0)
1403 sstrncpy (n.type_instance, vl.type_instance,
1404 sizeof (n.type_instance));
1405 }
1406 else if (pkg_type == TYPE_MESSAGE)
1407 {
1408 status = parse_part_string (&buffer, &buffer_size,
1409 n.message, sizeof (n.message));
1411 if (status != 0)
1412 {
1413 /* do nothing */
1414 }
1415 else if ((n.severity != NOTIF_FAILURE)
1416 && (n.severity != NOTIF_WARNING)
1417 && (n.severity != NOTIF_OKAY))
1418 {
1419 INFO ("network plugin: "
1420 "Ignoring notification with "
1421 "unknown severity %i.",
1422 n.severity);
1423 }
1424 else if (n.time <= 0)
1425 {
1426 INFO ("network plugin: "
1427 "Ignoring notification with "
1428 "time == 0.");
1429 }
1430 else if (strlen (n.message) <= 0)
1431 {
1432 INFO ("network plugin: "
1433 "Ignoring notification with "
1434 "an empty message.");
1435 }
1436 else
1437 {
1438 plugin_dispatch_notification (&n);
1439 }
1440 }
1441 else if (pkg_type == TYPE_SEVERITY)
1442 {
1443 uint64_t tmp = 0;
1444 status = parse_part_number (&buffer, &buffer_size,
1445 &tmp);
1446 if (status == 0)
1447 n.severity = (int) tmp;
1448 }
1449 else
1450 {
1451 DEBUG ("network plugin: parse_packet: Unknown part"
1452 " type: 0x%04hx", pkg_type);
1453 buffer = ((char *) buffer) + pkg_length;
1454 }
1455 } /* while (buffer_size > sizeof (part_header_t)) */
1457 if (status == 0 && buffer_size > 0)
1458 WARNING ("network plugin: parse_packet: Received truncated "
1459 "packet, try increasing `MaxPacketSize'");
1461 return (status);
1462 } /* }}} int parse_packet */
1464 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1465 {
1466 if (sec->fd >= 0)
1467 {
1468 close (sec->fd);
1469 sec->fd = -1;
1470 }
1471 sfree (sec->addr);
1472 #if HAVE_LIBGCRYPT
1473 sfree (sec->username);
1474 sfree (sec->password);
1475 if (sec->cypher != NULL)
1476 gcry_cipher_close (sec->cypher);
1477 #endif
1478 } /* }}} void free_sockent_client */
1480 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1481 {
1482 size_t i;
1484 for (i = 0; i < ses->fd_num; i++)
1485 {
1486 if (ses->fd[i] >= 0)
1487 {
1488 close (ses->fd[i]);
1489 ses->fd[i] = -1;
1490 }
1491 }
1493 sfree (ses->fd);
1494 #if HAVE_LIBGCRYPT
1495 sfree (ses->auth_file);
1496 fbh_destroy (ses->userdb);
1497 if (ses->cypher != NULL)
1498 gcry_cipher_close (ses->cypher);
1499 #endif
1500 } /* }}} void free_sockent_server */
1502 static void sockent_destroy (sockent_t *se) /* {{{ */
1503 {
1504 sockent_t *next;
1506 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1508 while (se != NULL)
1509 {
1510 next = se->next;
1512 sfree (se->node);
1513 sfree (se->service);
1515 if (se->type == SOCKENT_TYPE_CLIENT)
1516 free_sockent_client (&se->data.client);
1517 else
1518 free_sockent_server (&se->data.server);
1520 sfree (se);
1521 se = next;
1522 }
1523 } /* }}} void sockent_destroy */
1525 /*
1526 * int network_set_ttl
1527 *
1528 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1529 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1530 *
1531 * The `struct addrinfo' is used to destinguish between unicast and multicast
1532 * sockets.
1533 */
1534 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1535 {
1536 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1537 network_config_ttl);
1539 assert (se->type == SOCKENT_TYPE_CLIENT);
1541 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1542 return (-1);
1544 if (ai->ai_family == AF_INET)
1545 {
1546 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1547 int optname;
1549 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1550 optname = IP_MULTICAST_TTL;
1551 else
1552 optname = IP_TTL;
1554 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1555 &network_config_ttl,
1556 sizeof (network_config_ttl)) == -1)
1557 {
1558 char errbuf[1024];
1559 ERROR ("setsockopt: %s",
1560 sstrerror (errno, errbuf, sizeof (errbuf)));
1561 return (-1);
1562 }
1563 }
1564 else if (ai->ai_family == AF_INET6)
1565 {
1566 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1567 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1568 int optname;
1570 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1571 optname = IPV6_MULTICAST_HOPS;
1572 else
1573 optname = IPV6_UNICAST_HOPS;
1575 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1576 &network_config_ttl,
1577 sizeof (network_config_ttl)) == -1)
1578 {
1579 char errbuf[1024];
1580 ERROR ("setsockopt: %s",
1581 sstrerror (errno, errbuf,
1582 sizeof (errbuf)));
1583 return (-1);
1584 }
1585 }
1587 return (0);
1588 } /* int network_set_ttl */
1590 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1591 {
1592 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1593 network_config_interface_idx);
1595 assert (se->type == SOCKENT_TYPE_CLIENT);
1597 if (ai->ai_family == AF_INET)
1598 {
1599 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1600 #if KERNEL_LINUX
1601 struct ip_mreqn mreq;
1602 #else
1603 struct ip_mreq mreq;
1604 #endif
1606 if (! IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1607 return (0);
1609 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1610 #if KERNEL_LINUX
1611 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1612 mreq.imr_ifindex = network_config_interface_idx;
1613 #else
1614 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1615 #endif
1617 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1618 &mreq, sizeof (mreq)) == -1)
1619 {
1620 char errbuf[1024];
1621 ERROR ("setsockopt: %s",
1622 sstrerror (errno, errbuf, sizeof (errbuf)));
1623 return (-1);
1624 }
1625 }
1626 else if (ai->ai_family == AF_INET6)
1627 {
1628 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1630 if (! IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1631 return (0);
1633 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1634 &network_config_interface_idx,
1635 sizeof (network_config_interface_idx)) == -1)
1636 {
1637 char errbuf[1024];
1638 ERROR ("setsockopt: %s",
1639 sstrerror (errno, errbuf,
1640 sizeof (errbuf)));
1641 return (-1);
1642 }
1643 }
1645 return (0);
1646 } /* }}} network_set_interface */
1648 static int network_bind_socket (int fd, const struct addrinfo *ai)
1649 {
1650 int loop = 0;
1651 int yes = 1;
1653 /* allow multiple sockets to use the same PORT number */
1654 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1655 &yes, sizeof(yes)) == -1) {
1656 char errbuf[1024];
1657 ERROR ("setsockopt: %s",
1658 sstrerror (errno, errbuf, sizeof (errbuf)));
1659 return (-1);
1660 }
1662 DEBUG ("fd = %i; calling `bind'", fd);
1664 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1665 {
1666 char errbuf[1024];
1667 ERROR ("bind: %s",
1668 sstrerror (errno, errbuf, sizeof (errbuf)));
1669 return (-1);
1670 }
1672 if (ai->ai_family == AF_INET)
1673 {
1674 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1675 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1676 {
1677 #if KERNEL_LINUX
1678 struct ip_mreqn mreq;
1679 #else
1680 struct ip_mreq mreq;
1681 #endif
1683 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1685 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1686 #if KERNEL_LINUX
1687 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1688 mreq.imr_ifindex = network_config_interface_idx;
1689 #else
1690 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1691 #endif
1693 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1694 &loop, sizeof (loop)) == -1)
1695 {
1696 char errbuf[1024];
1697 ERROR ("setsockopt: %s",
1698 sstrerror (errno, errbuf,
1699 sizeof (errbuf)));
1700 return (-1);
1701 }
1703 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1704 &mreq, sizeof (mreq)) == -1)
1705 {
1706 char errbuf[1024];
1707 ERROR ("setsockopt: %s",
1708 sstrerror (errno, errbuf,
1709 sizeof (errbuf)));
1710 return (-1);
1711 }
1712 }
1713 }
1714 else if (ai->ai_family == AF_INET6)
1715 {
1716 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1717 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1718 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1719 {
1720 struct ipv6_mreq mreq;
1722 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1724 memcpy (&mreq.ipv6mr_multiaddr,
1725 &addr->sin6_addr,
1726 sizeof (addr->sin6_addr));
1728 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1729 * ipv6mr_interface may be set to zeroes to
1730 * choose the default multicast interface or to
1731 * the index of a particular multicast-capable
1732 * interface if the host is multihomed.
1733 * Membership is associ-associated with a
1734 * single interface; programs running on
1735 * multihomed hosts may need to join the same
1736 * group on more than one interface.*/
1737 mreq.ipv6mr_interface = network_config_interface_idx;
1739 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1740 &loop, sizeof (loop)) == -1)
1741 {
1742 char errbuf[1024];
1743 ERROR ("setsockopt: %s",
1744 sstrerror (errno, errbuf,
1745 sizeof (errbuf)));
1746 return (-1);
1747 }
1749 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1750 &mreq, sizeof (mreq)) == -1)
1751 {
1752 char errbuf[1024];
1753 ERROR ("setsockopt: %s",
1754 sstrerror (errno, errbuf,
1755 sizeof (errbuf)));
1756 return (-1);
1757 }
1758 }
1759 }
1761 return (0);
1762 } /* int network_bind_socket */
1764 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
1765 * or `SOCKENT_TYPE_SERVER' */
1766 static int sockent_init (sockent_t *se, int type) /* {{{ */
1767 {
1768 if (se == NULL)
1769 return (-1);
1771 memset (se, 0, sizeof (*se));
1773 se->type = SOCKENT_TYPE_CLIENT;
1774 se->node = NULL;
1775 se->service = NULL;
1776 se->next = NULL;
1778 if (type == SOCKENT_TYPE_SERVER)
1779 {
1780 se->type = SOCKENT_TYPE_SERVER;
1781 se->data.server.fd = NULL;
1782 #if HAVE_LIBGCRYPT
1783 se->data.server.security_level = SECURITY_LEVEL_NONE;
1784 se->data.server.auth_file = NULL;
1785 se->data.server.userdb = NULL;
1786 se->data.server.cypher = NULL;
1787 #endif
1788 }
1789 else
1790 {
1791 se->data.client.fd = -1;
1792 se->data.client.addr = NULL;
1793 #if HAVE_LIBGCRYPT
1794 se->data.client.security_level = SECURITY_LEVEL_NONE;
1795 se->data.client.username = NULL;
1796 se->data.client.password = NULL;
1797 se->data.client.cypher = NULL;
1798 #endif
1799 }
1801 return (0);
1802 } /* }}} int sockent_init */
1804 /* Open the file descriptors for a initialized sockent structure. */
1805 static int sockent_open (sockent_t *se) /* {{{ */
1806 {
1807 struct addrinfo ai_hints;
1808 struct addrinfo *ai_list, *ai_ptr;
1809 int ai_return;
1811 const char *node;
1812 const char *service;
1814 if (se == NULL)
1815 return (-1);
1817 /* Set up the security structures. */
1818 #if HAVE_LIBGCRYPT /* {{{ */
1819 if (se->type == SOCKENT_TYPE_CLIENT)
1820 {
1821 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
1822 {
1823 if ((se->data.client.username == NULL)
1824 || (se->data.client.password == NULL))
1825 {
1826 ERROR ("network plugin: Client socket with "
1827 "security requested, but no "
1828 "credentials are configured.");
1829 return (-1);
1830 }
1831 gcry_md_hash_buffer (GCRY_MD_SHA256,
1832 se->data.client.password_hash,
1833 se->data.client.password,
1834 strlen (se->data.client.password));
1835 }
1836 }
1837 else /* (se->type == SOCKENT_TYPE_SERVER) */
1838 {
1839 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
1840 {
1841 if (se->data.server.auth_file == NULL)
1842 {
1843 ERROR ("network plugin: Server socket with "
1844 "security requested, but no "
1845 "password file is configured.");
1846 return (-1);
1847 }
1848 }
1849 if (se->data.server.auth_file != NULL)
1850 {
1851 se->data.server.userdb = fbh_create (se->data.server.auth_file);
1852 if (se->data.server.userdb == NULL)
1853 {
1854 ERROR ("network plugin: Reading password file "
1855 "`%s' failed.",
1856 se->data.server.auth_file);
1857 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
1858 return (-1);
1859 }
1860 }
1861 }
1862 #endif /* }}} HAVE_LIBGCRYPT */
1864 node = se->node;
1865 service = se->service;
1867 if (service == NULL)
1868 service = NET_DEFAULT_PORT;
1870 DEBUG ("network plugin: sockent_open: node = %s; service = %s;",
1871 node, service);
1873 memset (&ai_hints, 0, sizeof (ai_hints));
1874 ai_hints.ai_flags = 0;
1875 #ifdef AI_PASSIVE
1876 ai_hints.ai_flags |= AI_PASSIVE;
1877 #endif
1878 #ifdef AI_ADDRCONFIG
1879 ai_hints.ai_flags |= AI_ADDRCONFIG;
1880 #endif
1881 ai_hints.ai_family = AF_UNSPEC;
1882 ai_hints.ai_socktype = SOCK_DGRAM;
1883 ai_hints.ai_protocol = IPPROTO_UDP;
1885 ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
1886 if (ai_return != 0)
1887 {
1888 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
1889 (se->node == NULL) ? "(null)" : se->node,
1890 (se->service == NULL) ? "(null)" : se->service,
1891 gai_strerror (ai_return));
1892 return (-1);
1893 }
1895 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1896 {
1897 int status;
1899 if (se->type == SOCKENT_TYPE_SERVER) /* {{{ */
1900 {
1901 int *tmp;
1903 tmp = realloc (se->data.server.fd,
1904 sizeof (*tmp) * (se->data.server.fd_num + 1));
1905 if (tmp == NULL)
1906 {
1907 ERROR ("network plugin: realloc failed.");
1908 continue;
1909 }
1910 se->data.server.fd = tmp;
1911 tmp = se->data.server.fd + se->data.server.fd_num;
1913 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
1914 ai_ptr->ai_protocol);
1915 if (*tmp < 0)
1916 {
1917 char errbuf[1024];
1918 ERROR ("network plugin: socket(2) failed: %s",
1919 sstrerror (errno, errbuf,
1920 sizeof (errbuf)));
1921 continue;
1922 }
1924 status = network_bind_socket (*tmp, ai_ptr);
1925 if (status != 0)
1926 {
1927 close (*tmp);
1928 *tmp = -1;
1929 continue;
1930 }
1932 se->data.server.fd_num++;
1933 continue;
1934 } /* }}} if (se->type == SOCKENT_TYPE_SERVER) */
1935 else /* if (se->type == SOCKENT_TYPE_CLIENT) {{{ */
1936 {
1937 se->data.client.fd = socket (ai_ptr->ai_family,
1938 ai_ptr->ai_socktype,
1939 ai_ptr->ai_protocol);
1940 if (se->data.client.fd < 0)
1941 {
1942 char errbuf[1024];
1943 ERROR ("network plugin: socket(2) failed: %s",
1944 sstrerror (errno, errbuf,
1945 sizeof (errbuf)));
1946 continue;
1947 }
1949 se->data.client.addr = malloc (sizeof (*se->data.client.addr));
1950 if (se->data.client.addr == NULL)
1951 {
1952 ERROR ("network plugin: malloc failed.");
1953 close (se->data.client.fd);
1954 se->data.client.fd = -1;
1955 continue;
1956 }
1958 memset (se->data.client.addr, 0, sizeof (*se->data.client.addr));
1959 assert (sizeof (*se->data.client.addr) >= ai_ptr->ai_addrlen);
1960 memcpy (se->data.client.addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1961 se->data.client.addrlen = ai_ptr->ai_addrlen;
1963 network_set_ttl (se, ai_ptr);
1964 network_set_interface (se, ai_ptr);
1966 /* We don't open more than one write-socket per
1967 * node/service pair.. */
1968 break;
1969 } /* }}} if (se->type == SOCKENT_TYPE_CLIENT) */
1970 } /* for (ai_list) */
1972 freeaddrinfo (ai_list);
1974 /* Check if all went well. */
1975 if (se->type == SOCKENT_TYPE_SERVER)
1976 {
1977 if (se->data.server.fd_num <= 0)
1978 return (-1);
1979 }
1980 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
1981 {
1982 if (se->data.client.fd < 0)
1983 return (-1);
1984 }
1986 return (0);
1987 } /* }}} int sockent_open */
1989 /* Add a sockent to the global list of sockets */
1990 static int sockent_add (sockent_t *se) /* {{{ */
1991 {
1992 sockent_t *last_ptr;
1994 if (se == NULL)
1995 return (-1);
1997 if (se->type == SOCKENT_TYPE_SERVER)
1998 {
1999 struct pollfd *tmp;
2000 size_t i;
2002 tmp = realloc (listen_sockets_pollfd,
2003 sizeof (*tmp) * (listen_sockets_num
2004 + se->data.server.fd_num));
2005 if (tmp == NULL)
2006 {
2007 ERROR ("network plugin: realloc failed.");
2008 return (-1);
2009 }
2010 listen_sockets_pollfd = tmp;
2011 tmp = listen_sockets_pollfd + listen_sockets_num;
2013 for (i = 0; i < se->data.server.fd_num; i++)
2014 {
2015 memset (tmp + i, 0, sizeof (*tmp));
2016 tmp[i].fd = se->data.server.fd[i];
2017 tmp[i].events = POLLIN | POLLPRI;
2018 tmp[i].revents = 0;
2019 }
2021 listen_sockets_num += se->data.server.fd_num;
2023 if (listen_sockets == NULL)
2024 {
2025 listen_sockets = se;
2026 return (0);
2027 }
2028 last_ptr = listen_sockets;
2029 }
2030 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2031 {
2032 if (sending_sockets == NULL)
2033 {
2034 sending_sockets = se;
2035 return (0);
2036 }
2037 last_ptr = sending_sockets;
2038 }
2040 while (last_ptr->next != NULL)
2041 last_ptr = last_ptr->next;
2042 last_ptr->next = se;
2044 return (0);
2045 } /* }}} int sockent_add */
2047 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
2048 {
2049 while (42)
2050 {
2051 receive_list_entry_t *ent;
2052 sockent_t *se;
2054 /* Lock and wait for more data to come in */
2055 pthread_mutex_lock (&receive_list_lock);
2056 while ((listen_loop == 0)
2057 && (receive_list_head == NULL))
2058 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
2060 /* Remove the head entry and unlock */
2061 ent = receive_list_head;
2062 if (ent != NULL)
2063 receive_list_head = ent->next;
2064 receive_list_length--;
2065 pthread_mutex_unlock (&receive_list_lock);
2067 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2068 * because we dispatch all missing packets before shutting down. */
2069 if (ent == NULL)
2070 break;
2072 /* Look for the correct `sockent_t' */
2073 se = listen_sockets;
2074 while (se != NULL)
2075 {
2076 size_t i;
2078 for (i = 0; i < se->data.server.fd_num; i++)
2079 if (se->data.server.fd[i] == ent->fd)
2080 break;
2082 if (i < se->data.server.fd_num)
2083 break;
2085 se = se->next;
2086 }
2088 if (se == NULL)
2089 {
2090 ERROR ("network plugin: Got packet from FD %i, but can't "
2091 "find an appropriate socket entry.",
2092 ent->fd);
2093 sfree (ent->data);
2094 sfree (ent);
2095 continue;
2096 }
2098 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0);
2099 sfree (ent->data);
2100 sfree (ent);
2101 } /* while (42) */
2103 return (NULL);
2104 } /* }}} void *dispatch_thread */
2106 static int network_receive (void) /* {{{ */
2107 {
2108 char buffer[network_config_packet_size];
2109 int buffer_len;
2111 int i;
2112 int status;
2114 receive_list_entry_t *private_list_head;
2115 receive_list_entry_t *private_list_tail;
2116 uint64_t private_list_length;
2118 assert (listen_sockets_num > 0);
2120 private_list_head = NULL;
2121 private_list_tail = NULL;
2122 private_list_length = 0;
2124 while (listen_loop == 0)
2125 {
2126 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2128 if (status <= 0)
2129 {
2130 char errbuf[1024];
2131 if (errno == EINTR)
2132 continue;
2133 ERROR ("poll failed: %s",
2134 sstrerror (errno, errbuf, sizeof (errbuf)));
2135 return (-1);
2136 }
2138 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2139 {
2140 receive_list_entry_t *ent;
2142 if ((listen_sockets_pollfd[i].revents
2143 & (POLLIN | POLLPRI)) == 0)
2144 continue;
2145 status--;
2147 buffer_len = recv (listen_sockets_pollfd[i].fd,
2148 buffer, sizeof (buffer),
2149 0 /* no flags */);
2150 if (buffer_len < 0)
2151 {
2152 char errbuf[1024];
2153 ERROR ("recv failed: %s",
2154 sstrerror (errno, errbuf,
2155 sizeof (errbuf)));
2156 return (-1);
2157 }
2159 stats_octets_rx += ((uint64_t) buffer_len);
2160 stats_packets_rx++;
2162 /* TODO: Possible performance enhancement: Do not free
2163 * these entries in the dispatch thread but put them in
2164 * another list, so we don't have to allocate more and
2165 * more of these structures. */
2166 ent = malloc (sizeof (receive_list_entry_t));
2167 if (ent == NULL)
2168 {
2169 ERROR ("network plugin: malloc failed.");
2170 return (-1);
2171 }
2172 memset (ent, 0, sizeof (receive_list_entry_t));
2173 ent->data = malloc (network_config_packet_size);
2174 if (ent->data == NULL)
2175 {
2176 sfree (ent);
2177 ERROR ("network plugin: malloc failed.");
2178 return (-1);
2179 }
2180 ent->fd = listen_sockets_pollfd[i].fd;
2181 ent->next = NULL;
2183 memcpy (ent->data, buffer, buffer_len);
2184 ent->data_len = buffer_len;
2186 if (private_list_head == NULL)
2187 private_list_head = ent;
2188 else
2189 private_list_tail->next = ent;
2190 private_list_tail = ent;
2191 private_list_length++;
2193 /* Do not block here. Blocking here has led to
2194 * insufficient performance in the past. */
2195 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2196 {
2197 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2198 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2200 if (receive_list_head == NULL)
2201 receive_list_head = private_list_head;
2202 else
2203 receive_list_tail->next = private_list_head;
2204 receive_list_tail = private_list_tail;
2205 receive_list_length += private_list_length;
2207 pthread_cond_signal (&receive_list_cond);
2208 pthread_mutex_unlock (&receive_list_lock);
2210 private_list_head = NULL;
2211 private_list_tail = NULL;
2212 private_list_length = 0;
2213 }
2214 } /* for (listen_sockets_pollfd) */
2215 } /* while (listen_loop == 0) */
2217 /* Make sure everything is dispatched before exiting. */
2218 if (private_list_head != NULL)
2219 {
2220 pthread_mutex_lock (&receive_list_lock);
2222 if (receive_list_head == NULL)
2223 receive_list_head = private_list_head;
2224 else
2225 receive_list_tail->next = private_list_head;
2226 receive_list_tail = private_list_tail;
2227 receive_list_length += private_list_length;
2229 private_list_head = NULL;
2230 private_list_tail = NULL;
2231 private_list_length = 0;
2233 pthread_cond_signal (&receive_list_cond);
2234 pthread_mutex_unlock (&receive_list_lock);
2235 }
2237 return (0);
2238 } /* }}} int network_receive */
2240 static void *receive_thread (void __attribute__((unused)) *arg)
2241 {
2242 return (network_receive () ? (void *) 1 : (void *) 0);
2243 } /* void *receive_thread */
2245 static void network_init_buffer (void)
2246 {
2247 memset (send_buffer, 0, network_config_packet_size);
2248 send_buffer_ptr = send_buffer;
2249 send_buffer_fill = 0;
2251 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2252 } /* int network_init_buffer */
2254 static void networt_send_buffer_plain (const sockent_t *se, /* {{{ */
2255 const char *buffer, size_t buffer_size)
2256 {
2257 int status;
2259 while (42)
2260 {
2261 status = sendto (se->data.client.fd, buffer, buffer_size,
2262 /* flags = */ 0,
2263 (struct sockaddr *) se->data.client.addr,
2264 se->data.client.addrlen);
2265 if (status < 0)
2266 {
2267 char errbuf[1024];
2268 if (errno == EINTR)
2269 continue;
2270 ERROR ("network plugin: sendto failed: %s",
2271 sstrerror (errno, errbuf,
2272 sizeof (errbuf)));
2273 break;
2274 }
2276 break;
2277 } /* while (42) */
2278 } /* }}} void networt_send_buffer_plain */
2280 #if HAVE_LIBGCRYPT
2281 #define BUFFER_ADD(p,s) do { \
2282 memcpy (buffer + buffer_offset, (p), (s)); \
2283 buffer_offset += (s); \
2284 } while (0)
2286 static void networt_send_buffer_signed (const sockent_t *se, /* {{{ */
2287 const char *in_buffer, size_t in_buffer_size)
2288 {
2289 part_signature_sha256_t ps;
2290 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2291 size_t buffer_offset;
2292 size_t username_len;
2294 gcry_md_hd_t hd;
2295 gcry_error_t err;
2296 unsigned char *hash;
2298 hd = NULL;
2299 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2300 if (err != 0)
2301 {
2302 ERROR ("network plugin: Creating HMAC object failed: %s",
2303 gcry_strerror (err));
2304 return;
2305 }
2307 err = gcry_md_setkey (hd, se->data.client.password,
2308 strlen (se->data.client.password));
2309 if (err != 0)
2310 {
2311 ERROR ("network plugin: gcry_md_setkey failed: %s",
2312 gcry_strerror (err));
2313 gcry_md_close (hd);
2314 return;
2315 }
2317 username_len = strlen (se->data.client.username);
2318 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2319 {
2320 ERROR ("network plugin: Username too long: %s",
2321 se->data.client.username);
2322 return;
2323 }
2325 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2326 se->data.client.username, username_len);
2327 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2328 in_buffer, in_buffer_size);
2330 /* Initialize the `ps' structure. */
2331 memset (&ps, 0, sizeof (ps));
2332 ps.head.type = htons (TYPE_SIGN_SHA256);
2333 ps.head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len);
2335 /* Calculate the hash value. */
2336 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2337 username_len + in_buffer_size);
2338 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2339 if (hash == NULL)
2340 {
2341 ERROR ("network plugin: gcry_md_read failed.");
2342 gcry_md_close (hd);
2343 return;
2344 }
2345 memcpy (ps.hash, hash, sizeof (ps.hash));
2347 /* Add the header */
2348 buffer_offset = 0;
2350 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2351 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2352 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2354 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2356 gcry_md_close (hd);
2357 hd = NULL;
2359 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2360 networt_send_buffer_plain (se, buffer, buffer_offset);
2361 } /* }}} void networt_send_buffer_signed */
2363 static void networt_send_buffer_encrypted (sockent_t *se, /* {{{ */
2364 const char *in_buffer, size_t in_buffer_size)
2365 {
2366 part_encryption_aes256_t pea;
2367 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2368 size_t buffer_size;
2369 size_t buffer_offset;
2370 size_t header_size;
2371 size_t username_len;
2372 gcry_error_t err;
2373 gcry_cipher_hd_t cypher;
2375 /* Initialize the header fields */
2376 memset (&pea, 0, sizeof (pea));
2377 pea.head.type = htons (TYPE_ENCR_AES256);
2379 pea.username = se->data.client.username;
2381 username_len = strlen (pea.username);
2382 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2383 {
2384 ERROR ("network plugin: Username too long: %s", pea.username);
2385 return;
2386 }
2388 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2389 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2390 - sizeof (pea.hash);
2392 assert (buffer_size <= sizeof (buffer));
2393 DEBUG ("network plugin: networt_send_buffer_encrypted: "
2394 "buffer_size = %zu;", buffer_size);
2396 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2397 + username_len + in_buffer_size));
2398 pea.username_length = htons ((uint16_t) username_len);
2400 /* Chose a random initialization vector. */
2401 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2403 /* Create hash of the payload */
2404 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2406 /* Initialize the buffer */
2407 buffer_offset = 0;
2408 memset (buffer, 0, sizeof (buffer));
2411 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2412 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2413 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2414 BUFFER_ADD (pea.username, username_len);
2415 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2416 assert (buffer_offset == header_size);
2417 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2418 BUFFER_ADD (in_buffer, in_buffer_size);
2420 assert (buffer_offset == buffer_size);
2422 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2423 se->data.client.password);
2424 if (cypher == NULL)
2425 return;
2427 /* Encrypt the buffer in-place */
2428 err = gcry_cipher_encrypt (cypher,
2429 buffer + header_size,
2430 buffer_size - header_size,
2431 /* in = */ NULL, /* in len = */ 0);
2432 if (err != 0)
2433 {
2434 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2435 gcry_strerror (err));
2436 return;
2437 }
2439 /* Send it out without further modifications */
2440 networt_send_buffer_plain (se, buffer, buffer_size);
2441 } /* }}} void networt_send_buffer_encrypted */
2442 #undef BUFFER_ADD
2443 #endif /* HAVE_LIBGCRYPT */
2445 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2446 {
2447 sockent_t *se;
2449 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2451 for (se = sending_sockets; se != NULL; se = se->next)
2452 {
2453 #if HAVE_LIBGCRYPT
2454 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2455 networt_send_buffer_encrypted (se, buffer, buffer_len);
2456 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2457 networt_send_buffer_signed (se, buffer, buffer_len);
2458 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2459 #endif /* HAVE_LIBGCRYPT */
2460 networt_send_buffer_plain (se, buffer, buffer_len);
2461 } /* for (sending_sockets) */
2462 } /* }}} void network_send_buffer */
2464 static int add_to_buffer (char *buffer, int buffer_size, /* {{{ */
2465 value_list_t *vl_def,
2466 const data_set_t *ds, const value_list_t *vl)
2467 {
2468 char *buffer_orig = buffer;
2470 if (strcmp (vl_def->host, vl->host) != 0)
2471 {
2472 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2473 vl->host, strlen (vl->host)) != 0)
2474 return (-1);
2475 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2476 }
2478 if (vl_def->time != vl->time)
2479 {
2480 if (write_part_number (&buffer, &buffer_size, TYPE_TIME,
2481 (uint64_t) vl->time))
2482 return (-1);
2483 vl_def->time = vl->time;
2484 }
2486 if (vl_def->interval != vl->interval)
2487 {
2488 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL,
2489 (uint64_t) vl->interval))
2490 return (-1);
2491 vl_def->interval = vl->interval;
2492 }
2494 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2495 {
2496 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2497 vl->plugin, strlen (vl->plugin)) != 0)
2498 return (-1);
2499 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2500 }
2502 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2503 {
2504 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2505 vl->plugin_instance,
2506 strlen (vl->plugin_instance)) != 0)
2507 return (-1);
2508 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2509 }
2511 if (strcmp (vl_def->type, vl->type) != 0)
2512 {
2513 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2514 vl->type, strlen (vl->type)) != 0)
2515 return (-1);
2516 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2517 }
2519 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2520 {
2521 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2522 vl->type_instance,
2523 strlen (vl->type_instance)) != 0)
2524 return (-1);
2525 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2526 }
2528 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2529 return (-1);
2531 return (buffer - buffer_orig);
2532 } /* }}} int add_to_buffer */
2534 static void flush_buffer (void)
2535 {
2536 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2537 send_buffer_fill);
2539 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2541 stats_octets_tx += ((uint64_t) send_buffer_fill);
2542 stats_packets_tx++;
2544 network_init_buffer ();
2545 }
2547 static int network_write (const data_set_t *ds, const value_list_t *vl,
2548 user_data_t __attribute__((unused)) *user_data)
2549 {
2550 int status;
2552 if (!check_send_okay (vl))
2553 {
2554 #if COLLECT_DEBUG
2555 char name[6*DATA_MAX_NAME_LEN];
2556 FORMAT_VL (name, sizeof (name), vl);
2557 name[sizeof (name) - 1] = 0;
2558 DEBUG ("network plugin: network_write: "
2559 "NOT sending %s.", name);
2560 #endif
2561 /* Counter is not protected by another lock and may be reached by
2562 * multiple threads */
2563 pthread_mutex_lock (&stats_lock);
2564 stats_values_not_sent++;
2565 pthread_mutex_unlock (&stats_lock);
2566 return (0);
2567 }
2569 uc_meta_data_add_unsigned_int (vl,
2570 "network:time_sent", (uint64_t) vl->time);
2572 pthread_mutex_lock (&send_buffer_lock);
2574 status = add_to_buffer (send_buffer_ptr,
2575 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2576 &send_buffer_vl,
2577 ds, vl);
2578 if (status >= 0)
2579 {
2580 /* status == bytes added to the buffer */
2581 send_buffer_fill += status;
2582 send_buffer_ptr += status;
2584 stats_values_sent++;
2585 }
2586 else
2587 {
2588 flush_buffer ();
2590 status = add_to_buffer (send_buffer_ptr,
2591 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2592 &send_buffer_vl,
2593 ds, vl);
2595 if (status >= 0)
2596 {
2597 send_buffer_fill += status;
2598 send_buffer_ptr += status;
2600 stats_values_sent++;
2601 }
2602 }
2604 if (status < 0)
2605 {
2606 ERROR ("network plugin: Unable to append to the "
2607 "buffer for some weird reason");
2608 }
2609 else if ((network_config_packet_size - send_buffer_fill) < 15)
2610 {
2611 flush_buffer ();
2612 }
2614 pthread_mutex_unlock (&send_buffer_lock);
2616 return ((status < 0) ? -1 : 0);
2617 } /* int network_write */
2619 static int network_config_set_boolean (const oconfig_item_t *ci, /* {{{ */
2620 int *retval)
2621 {
2622 if ((ci->values_num != 1)
2623 || ((ci->values[0].type != OCONFIG_TYPE_BOOLEAN)
2624 && (ci->values[0].type != OCONFIG_TYPE_STRING)))
2625 {
2626 ERROR ("network plugin: The `%s' config option needs "
2627 "exactly one boolean argument.", ci->key);
2628 return (-1);
2629 }
2631 if (ci->values[0].type == OCONFIG_TYPE_BOOLEAN)
2632 {
2633 if (ci->values[0].value.boolean)
2634 *retval = 1;
2635 else
2636 *retval = 0;
2637 }
2638 else
2639 {
2640 char *str = ci->values[0].value.string;
2642 if (IS_TRUE (str))
2643 *retval = 1;
2644 else if (IS_FALSE (str))
2645 *retval = 0;
2646 else
2647 {
2648 ERROR ("network plugin: Cannot parse string value `%s' of the `%s' "
2649 "option as boolean value.",
2650 str, ci->key);
2651 return (-1);
2652 }
2653 }
2655 return (0);
2656 } /* }}} int network_config_set_boolean */
2658 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2659 {
2660 int tmp;
2661 if ((ci->values_num != 1)
2662 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2663 {
2664 WARNING ("network plugin: The `TimeToLive' config option needs exactly "
2665 "one numeric argument.");
2666 return (-1);
2667 }
2669 tmp = (int) ci->values[0].value.number;
2670 if ((tmp > 0) && (tmp <= 255))
2671 network_config_ttl = tmp;
2673 return (0);
2674 } /* }}} int network_config_set_ttl */
2676 static int network_config_set_interface (const oconfig_item_t *ci) /* {{{ */
2677 {
2678 if ((ci->values_num != 1)
2679 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2680 {
2681 WARNING ("network plugin: The `Interface' config option needs exactly "
2682 "one string argument.");
2683 return (-1);
2684 }
2686 network_config_interface_idx = if_nametoindex (ci->values[0].value.string);
2688 return (0);
2689 } /* }}} int network_config_set_interface */
2691 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
2692 {
2693 int tmp;
2694 if ((ci->values_num != 1)
2695 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
2696 {
2697 WARNING ("network plugin: The `MaxPacketSize' config option needs exactly "
2698 "one numeric argument.");
2699 return (-1);
2700 }
2702 tmp = (int) ci->values[0].value.number;
2703 if ((tmp >= 1024) && (tmp <= 65535))
2704 network_config_packet_size = tmp;
2706 return (0);
2707 } /* }}} int network_config_set_buffer_size */
2709 #if HAVE_LIBGCRYPT
2710 static int network_config_set_string (const oconfig_item_t *ci, /* {{{ */
2711 char **ret_string)
2712 {
2713 char *tmp;
2714 if ((ci->values_num != 1)
2715 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2716 {
2717 WARNING ("network plugin: The `%s' config option needs exactly "
2718 "one string argument.", ci->key);
2719 return (-1);
2720 }
2722 tmp = strdup (ci->values[0].value.string);
2723 if (tmp == NULL)
2724 return (-1);
2726 sfree (*ret_string);
2727 *ret_string = tmp;
2729 return (0);
2730 } /* }}} int network_config_set_string */
2731 #endif /* HAVE_LIBGCRYPT */
2733 #if HAVE_LIBGCRYPT
2734 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
2735 int *retval)
2736 {
2737 char *str;
2738 if ((ci->values_num != 1)
2739 || (ci->values[0].type != OCONFIG_TYPE_STRING))
2740 {
2741 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
2742 "one string argument.");
2743 return (-1);
2744 }
2746 str = ci->values[0].value.string;
2747 if (strcasecmp ("Encrypt", str) == 0)
2748 *retval = SECURITY_LEVEL_ENCRYPT;
2749 else if (strcasecmp ("Sign", str) == 0)
2750 *retval = SECURITY_LEVEL_SIGN;
2751 else if (strcasecmp ("None", str) == 0)
2752 *retval = SECURITY_LEVEL_NONE;
2753 else
2754 {
2755 WARNING ("network plugin: Unknown security level: %s.", str);
2756 return (-1);
2757 }
2759 return (0);
2760 } /* }}} int network_config_set_security_level */
2761 #endif /* HAVE_LIBGCRYPT */
2763 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
2764 {
2765 sockent_t *se;
2766 int status;
2767 int i;
2769 if ((ci->values_num < 1) || (ci->values_num > 2)
2770 || (ci->values[0].type != OCONFIG_TYPE_STRING)
2771 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
2772 {
2773 ERROR ("network plugin: The `%s' config option needs "
2774 "one or two string arguments.", ci->key);
2775 return (-1);
2776 }
2778 se = malloc (sizeof (*se));
2779 if (se == NULL)
2780 {
2781 ERROR ("network plugin: malloc failed.");
2782 return (-1);
2783 }
2784 sockent_init (se, SOCKENT_TYPE_SERVER);
2786 se->node = strdup (ci->values[0].value.string);
2787 if (ci->values_num >= 2)
2788 se->service = strdup (ci->values[1].value.string);
2790 for (i = 0; i < ci->children_num; i++)
2791 {
2792 oconfig_item_t *child = ci->children + i;
2794 #if HAVE_LIBGCRYPT
2795 if (strcasecmp ("AuthFile", child->key) == 0)
2796 network_config_set_string (child, &se->data.server.auth_file);
2797 else if (strcasecmp ("SecurityLevel", child->key) == 0)
2798 network_config_set_security_level (child,
2799 &se->data.server.security_level);
2800 else
2801 #endif /* HAVE_LIBGCRYPT */
2802 {
2803 WARNING ("network plugin: Option `%s' is not allowed here.",
2804 child->key);
2805 }
2806 }
2808 #if HAVE_LIBGCRYPT
2809 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
2810 && (se->data.server.auth_file == NULL))
2811 {
2812 ERROR ("network plugin: A security level higher than `none' was "
2813 "requested, but no AuthFile option was given. Cowardly refusing to "
2814 "open this socket!");
2815 sockent_destroy (se);
2816 return (-1);
2817 }
2818 #endif /* HAVE_LIBGCRYPT */
2820 status = sockent_open (se);
2821 if (status != 0)
2822 {
2823 ERROR ("network plugin: network_config_add_listen: sockent_open failed.");
2824 sockent_destroy (se);
2825 return (-1);
2826 }
2828 status = sockent_add (se);
2829 if (status != 0)
2830 {
2831 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
2832 sockent_destroy (se);
2833 return (-1);
2834 }
2836 return (0);
2837 } /* }}} int network_config_add_listen */
2839 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
2840 {
2841 sockent_t *se;
2842 int status;
2843 int i;
2845 if ((ci->values_num < 1) || (ci->values_num > 2)
2846 || (ci->values[0].type != OCONFIG_TYPE_STRING)
2847 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
2848 {
2849 ERROR ("network plugin: The `%s' config option needs "
2850 "one or two string arguments.", ci->key);
2851 return (-1);
2852 }
2854 se = malloc (sizeof (*se));
2855 if (se == NULL)
2856 {
2857 ERROR ("network plugin: malloc failed.");
2858 return (-1);
2859 }
2860 sockent_init (se, SOCKENT_TYPE_CLIENT);
2862 se->node = strdup (ci->values[0].value.string);
2863 if (ci->values_num >= 2)
2864 se->service = strdup (ci->values[1].value.string);
2866 for (i = 0; i < ci->children_num; i++)
2867 {
2868 oconfig_item_t *child = ci->children + i;
2870 #if HAVE_LIBGCRYPT
2871 if (strcasecmp ("Username", child->key) == 0)
2872 network_config_set_string (child, &se->data.client.username);
2873 else if (strcasecmp ("Password", child->key) == 0)
2874 network_config_set_string (child, &se->data.client.password);
2875 else if (strcasecmp ("SecurityLevel", child->key) == 0)
2876 network_config_set_security_level (child,
2877 &se->data.client.security_level);
2878 else
2879 #endif /* HAVE_LIBGCRYPT */
2880 {
2881 WARNING ("network plugin: Option `%s' is not allowed here.",
2882 child->key);
2883 }
2884 }
2886 #if HAVE_LIBGCRYPT
2887 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
2888 && ((se->data.client.username == NULL)
2889 || (se->data.client.password == NULL)))
2890 {
2891 ERROR ("network plugin: A security level higher than `none' was "
2892 "requested, but no Username or Password option was given. "
2893 "Cowardly refusing to open this socket!");
2894 sockent_destroy (se);
2895 return (-1);
2896 }
2897 #endif /* HAVE_LIBGCRYPT */
2899 status = sockent_open (se);
2900 if (status != 0)
2901 {
2902 ERROR ("network plugin: network_config_add_server: sockent_open failed.");
2903 sockent_destroy (se);
2904 return (-1);
2905 }
2907 status = sockent_add (se);
2908 if (status != 0)
2909 {
2910 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
2911 sockent_destroy (se);
2912 return (-1);
2913 }
2915 return (0);
2916 } /* }}} int network_config_add_server */
2918 static int network_config (oconfig_item_t *ci) /* {{{ */
2919 {
2920 int i;
2922 for (i = 0; i < ci->children_num; i++)
2923 {
2924 oconfig_item_t *child = ci->children + i;
2926 if (strcasecmp ("Listen", child->key) == 0)
2927 network_config_add_listen (child);
2928 else if (strcasecmp ("Server", child->key) == 0)
2929 network_config_add_server (child);
2930 else if (strcasecmp ("TimeToLive", child->key) == 0)
2931 network_config_set_ttl (child);
2932 else if (strcasecmp ("Interface", child->key) == 0)
2933 network_config_set_interface (child);
2934 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
2935 network_config_set_buffer_size (child);
2936 else if (strcasecmp ("Forward", child->key) == 0)
2937 network_config_set_boolean (child, &network_config_forward);
2938 else if (strcasecmp ("ReportStats", child->key) == 0)
2939 network_config_set_boolean (child, &network_config_stats);
2940 else if (strcasecmp ("CacheFlush", child->key) == 0)
2941 /* no op for backwards compatibility only */;
2942 else
2943 {
2944 WARNING ("network plugin: Option `%s' is not allowed here.",
2945 child->key);
2946 }
2947 }
2949 return (0);
2950 } /* }}} int network_config */
2952 static int network_notification (const notification_t *n,
2953 user_data_t __attribute__((unused)) *user_data)
2954 {
2955 char buffer[network_config_packet_size];
2956 char *buffer_ptr = buffer;
2957 int buffer_free = sizeof (buffer);
2958 int status;
2960 memset (buffer, '\0', sizeof (buffer));
2963 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME,
2964 (uint64_t) n->time);
2965 if (status != 0)
2966 return (-1);
2968 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
2969 (uint64_t) n->severity);
2970 if (status != 0)
2971 return (-1);
2973 if (strlen (n->host) > 0)
2974 {
2975 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
2976 n->host, strlen (n->host));
2977 if (status != 0)
2978 return (-1);
2979 }
2981 if (strlen (n->plugin) > 0)
2982 {
2983 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
2984 n->plugin, strlen (n->plugin));
2985 if (status != 0)
2986 return (-1);
2987 }
2989 if (strlen (n->plugin_instance) > 0)
2990 {
2991 status = write_part_string (&buffer_ptr, &buffer_free,
2992 TYPE_PLUGIN_INSTANCE,
2993 n->plugin_instance, strlen (n->plugin_instance));
2994 if (status != 0)
2995 return (-1);
2996 }
2998 if (strlen (n->type) > 0)
2999 {
3000 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3001 n->type, strlen (n->type));
3002 if (status != 0)
3003 return (-1);
3004 }
3006 if (strlen (n->type_instance) > 0)
3007 {
3008 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3009 n->type_instance, strlen (n->type_instance));
3010 if (status != 0)
3011 return (-1);
3012 }
3014 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3015 n->message, strlen (n->message));
3016 if (status != 0)
3017 return (-1);
3019 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3021 return (0);
3022 } /* int network_notification */
3024 static int network_shutdown (void)
3025 {
3026 listen_loop++;
3028 /* Kill the listening thread */
3029 if (receive_thread_running != 0)
3030 {
3031 INFO ("network plugin: Stopping receive thread.");
3032 pthread_kill (receive_thread_id, SIGTERM);
3033 pthread_join (receive_thread_id, NULL /* no return value */);
3034 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3035 receive_thread_running = 0;
3036 }
3038 /* Shutdown the dispatching thread */
3039 if (dispatch_thread_running != 0)
3040 {
3041 INFO ("network plugin: Stopping dispatch thread.");
3042 pthread_mutex_lock (&receive_list_lock);
3043 pthread_cond_broadcast (&receive_list_cond);
3044 pthread_mutex_unlock (&receive_list_lock);
3045 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3046 dispatch_thread_running = 0;
3047 }
3049 sockent_destroy (listen_sockets);
3051 if (send_buffer_fill > 0)
3052 flush_buffer ();
3054 sfree (send_buffer);
3056 /* TODO: Close `sending_sockets' */
3058 plugin_unregister_config ("network");
3059 plugin_unregister_init ("network");
3060 plugin_unregister_write ("network");
3061 plugin_unregister_shutdown ("network");
3063 return (0);
3064 } /* int network_shutdown */
3066 static int network_stats_read (void) /* {{{ */
3067 {
3068 uint64_t copy_octets_rx;
3069 uint64_t copy_octets_tx;
3070 uint64_t copy_packets_rx;
3071 uint64_t copy_packets_tx;
3072 uint64_t copy_values_dispatched;
3073 uint64_t copy_values_not_dispatched;
3074 uint64_t copy_values_sent;
3075 uint64_t copy_values_not_sent;
3076 uint64_t copy_receive_list_length;
3077 value_list_t vl = VALUE_LIST_INIT;
3078 value_t values[2];
3080 copy_octets_rx = stats_octets_rx;
3081 copy_octets_tx = stats_octets_tx;
3082 copy_packets_rx = stats_packets_rx;
3083 copy_packets_tx = stats_packets_tx;
3084 copy_values_dispatched = stats_values_dispatched;
3085 copy_values_not_dispatched = stats_values_not_dispatched;
3086 copy_values_sent = stats_values_sent;
3087 copy_values_not_sent = stats_values_not_sent;
3088 copy_receive_list_length = receive_list_length;
3090 /* Initialize `vl' */
3091 vl.values = values;
3092 vl.values_len = 2;
3093 vl.time = 0;
3094 vl.interval = interval_g;
3095 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3096 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3098 /* Octets received / sent */
3099 vl.values[0].counter = (counter_t) copy_octets_rx;
3100 vl.values[1].counter = (counter_t) copy_octets_tx;
3101 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3102 plugin_dispatch_values (&vl);
3104 /* Packets received / send */
3105 vl.values[0].counter = (counter_t) copy_packets_rx;
3106 vl.values[1].counter = (counter_t) copy_packets_tx;
3107 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3108 plugin_dispatch_values (&vl);
3110 /* Values (not) dispatched and (not) send */
3111 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3112 vl.values_len = 1;
3114 vl.values[0].derive = (derive_t) copy_values_dispatched;
3115 sstrncpy (vl.type_instance, "dispatch-accepted",
3116 sizeof (vl.type_instance));
3117 plugin_dispatch_values (&vl);
3119 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3120 sstrncpy (vl.type_instance, "dispatch-rejected",
3121 sizeof (vl.type_instance));
3122 plugin_dispatch_values (&vl);
3124 vl.values[0].derive = (derive_t) copy_values_sent;
3125 sstrncpy (vl.type_instance, "send-accepted",
3126 sizeof (vl.type_instance));
3127 plugin_dispatch_values (&vl);
3129 vl.values[0].derive = (derive_t) copy_values_not_sent;
3130 sstrncpy (vl.type_instance, "send-rejected",
3131 sizeof (vl.type_instance));
3132 plugin_dispatch_values (&vl);
3134 /* Receive queue length */
3135 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3136 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3137 vl.type_instance[0] = 0;
3138 plugin_dispatch_values (&vl);
3140 return (0);
3141 } /* }}} int network_stats_read */
3143 static int network_init (void)
3144 {
3145 static _Bool have_init = false;
3147 /* Check if we were already initialized. If so, just return - there's
3148 * nothing more to do (for now, that is). */
3149 if (have_init)
3150 return (0);
3151 have_init = true;
3153 #if HAVE_LIBGCRYPT
3154 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
3155 gcry_control (GCRYCTL_INIT_SECMEM, 32768, 0);
3156 gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
3157 #endif
3159 if (network_config_stats != 0)
3160 plugin_register_read ("network", network_stats_read);
3162 plugin_register_shutdown ("network", network_shutdown);
3164 send_buffer = malloc (network_config_packet_size);
3165 if (send_buffer == NULL)
3166 {
3167 ERROR ("network plugin: malloc failed.");
3168 return (-1);
3169 }
3170 network_init_buffer ();
3172 /* setup socket(s) and so on */
3173 if (sending_sockets != NULL)
3174 {
3175 plugin_register_write ("network", network_write,
3176 /* user_data = */ NULL);
3177 plugin_register_notification ("network", network_notification,
3178 /* user_data = */ NULL);
3179 }
3181 /* If no threads need to be started, return here. */
3182 if ((listen_sockets_num == 0)
3183 || ((dispatch_thread_running != 0)
3184 && (receive_thread_running != 0)))
3185 return (0);
3187 if (dispatch_thread_running == 0)
3188 {
3189 int status;
3190 status = pthread_create (&dispatch_thread_id,
3191 NULL /* no attributes */,
3192 dispatch_thread,
3193 NULL /* no argument */);
3194 if (status != 0)
3195 {
3196 char errbuf[1024];
3197 ERROR ("network: pthread_create failed: %s",
3198 sstrerror (errno, errbuf,
3199 sizeof (errbuf)));
3200 }
3201 else
3202 {
3203 dispatch_thread_running = 1;
3204 }
3205 }
3207 if (receive_thread_running == 0)
3208 {
3209 int status;
3210 status = pthread_create (&receive_thread_id,
3211 NULL /* no attributes */,
3212 receive_thread,
3213 NULL /* no argument */);
3214 if (status != 0)
3215 {
3216 char errbuf[1024];
3217 ERROR ("network: pthread_create failed: %s",
3218 sstrerror (errno, errbuf,
3219 sizeof (errbuf)));
3220 }
3221 else
3222 {
3223 receive_thread_running = 1;
3224 }
3225 }
3227 return (0);
3228 } /* int network_init */
3230 /*
3231 * The flush option of the network plugin cannot flush individual identifiers.
3232 * All the values are added to a buffer and sent when the buffer is full, the
3233 * requested value may or may not be in there, it's not worth finding out. We
3234 * just send the buffer if `flush' is called - if the requested value was in
3235 * there, good. If not, well, then there is nothing to flush.. -octo
3236 */
3237 static int network_flush (int timeout,
3238 const char __attribute__((unused)) *identifier,
3239 user_data_t __attribute__((unused)) *user_data)
3240 {
3241 pthread_mutex_lock (&send_buffer_lock);
3243 if (send_buffer_fill > 0)
3244 flush_buffer ();
3246 pthread_mutex_unlock (&send_buffer_lock);
3248 return (0);
3249 } /* int network_flush */
3251 void module_register (void)
3252 {
3253 plugin_register_complex_config ("network", network_config);
3254 plugin_register_init ("network", network_init);
3255 plugin_register_flush ("network", network_flush,
3256 /* user_data = */ NULL);
3257 } /* void module_register */
3259 /* vim: set fdm=marker : */