1 /**
2 * collectd - src/network.c
3 * Copyright (C) 2005-2013 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 collectd.org>
22 * Aman Gupta <aman at tmm1.net>
23 **/
25 #define _DEFAULT_SOURCE
26 #define _BSD_SOURCE /* For struct ip_mreq */
28 #include "collectd.h"
29 #include "plugin.h"
30 #include "common.h"
31 #include "configfile.h"
32 #include "utils_fbhash.h"
33 #include "utils_avltree.h"
34 #include "utils_cache.h"
35 #include "utils_complain.h"
37 #include "network.h"
39 #if HAVE_PTHREAD_H
40 # include <pthread.h>
41 #endif
42 #if HAVE_SYS_SOCKET_H
43 # include <sys/socket.h>
44 #endif
45 #if HAVE_NETDB_H
46 # include <netdb.h>
47 #endif
48 #if HAVE_NETINET_IN_H
49 # include <netinet/in.h>
50 #endif
51 #if HAVE_ARPA_INET_H
52 # include <arpa/inet.h>
53 #endif
54 #if HAVE_POLL_H
55 # include <poll.h>
56 #endif
57 #if HAVE_NET_IF_H
58 # include <net/if.h>
59 #endif
61 #if HAVE_LIBGCRYPT
62 # include <pthread.h>
63 # if defined __APPLE__
64 /* default xcode compiler throws warnings even when deprecated functionality
65 * is not used. -Werror breaks the build because of erroneous warnings.
66 * http://stackoverflow.com/questions/10556299/compiler-warnings-with-libgcrypt-v1-5-0/12830209#12830209
67 */
68 # pragma GCC diagnostic ignored "-Wdeprecated-declarations"
69 # endif
70 /* FreeBSD's copy of libgcrypt extends the existing GCRYPT_NO_DEPRECATED
71 * to properly hide all deprecated functionality.
72 * http://svnweb.freebsd.org/ports/head/security/libgcrypt/files/patch-src__gcrypt.h.in
73 */
74 # define GCRYPT_NO_DEPRECATED
75 # include <gcrypt.h>
76 # if defined __APPLE__
77 /* Re enable deprecation warnings */
78 # pragma GCC diagnostic warning "-Wdeprecated-declarations"
79 # endif
80 # if GCRYPT_VERSION_NUMBER < 0x010600
81 GCRY_THREAD_OPTION_PTHREAD_IMPL;
82 # endif
83 #endif
85 #ifndef IPV6_ADD_MEMBERSHIP
86 # ifdef IPV6_JOIN_GROUP
87 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
88 # else
89 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
90 # endif
91 #endif /* !IP_ADD_MEMBERSHIP */
93 /*
94 * Maximum size required for encryption / signing:
95 *
96 * 42 bytes for the encryption header
97 * + 64 bytes for the username
98 * -----------
99 * = 106 bytes
100 */
101 #define BUFF_SIG_SIZE 106
103 /*
104 * Private data types
105 */
106 #define SECURITY_LEVEL_NONE 0
107 #if HAVE_LIBGCRYPT
108 # define SECURITY_LEVEL_SIGN 1
109 # define SECURITY_LEVEL_ENCRYPT 2
110 #endif
111 struct sockent_client
112 {
113 int fd;
114 struct sockaddr_storage *addr;
115 socklen_t addrlen;
116 #if HAVE_LIBGCRYPT
117 int security_level;
118 char *username;
119 char *password;
120 gcry_cipher_hd_t cypher;
121 unsigned char password_hash[32];
122 #endif
123 cdtime_t next_resolve_reconnect;
124 cdtime_t resolve_interval;
125 };
127 struct sockent_server
128 {
129 int *fd;
130 size_t fd_num;
131 #if HAVE_LIBGCRYPT
132 int security_level;
133 char *auth_file;
134 fbhash_t *userdb;
135 gcry_cipher_hd_t cypher;
136 #endif
137 };
139 typedef struct sockent
140 {
141 #define SOCKENT_TYPE_CLIENT 1
142 #define SOCKENT_TYPE_SERVER 2
143 int type;
145 char *node;
146 char *service;
147 int interface;
149 union
150 {
151 struct sockent_client client;
152 struct sockent_server server;
153 } data;
155 struct sockent *next;
156 } sockent_t;
158 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
159 * 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
160 * +-------+-----------------------+-------------------------------+
161 * ! Ver. ! ! Length !
162 * +-------+-----------------------+-------------------------------+
163 */
164 struct part_header_s
165 {
166 uint16_t type;
167 uint16_t length;
168 };
169 typedef struct part_header_s part_header_t;
171 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
172 * 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
173 * +-------------------------------+-------------------------------+
174 * ! Type ! Length !
175 * +-------------------------------+-------------------------------+
176 * : (Length - 4) Bytes :
177 * +---------------------------------------------------------------+
178 */
179 struct part_string_s
180 {
181 part_header_t *head;
182 char *value;
183 };
184 typedef struct part_string_s part_string_t;
186 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
187 * 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
188 * +-------------------------------+-------------------------------+
189 * ! Type ! Length !
190 * +-------------------------------+-------------------------------+
191 * : (Length - 4 == 2 || 4 || 8) Bytes :
192 * +---------------------------------------------------------------+
193 */
194 struct part_number_s
195 {
196 part_header_t *head;
197 uint64_t *value;
198 };
199 typedef struct part_number_s part_number_t;
201 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
202 * 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
203 * +-------------------------------+-------------------------------+
204 * ! Type ! Length !
205 * +-------------------------------+---------------+---------------+
206 * ! Num of values ! Type0 ! Type1 !
207 * +-------------------------------+---------------+---------------+
208 * ! Value0 !
209 * ! !
210 * +---------------------------------------------------------------+
211 * ! Value1 !
212 * ! !
213 * +---------------------------------------------------------------+
214 */
215 struct part_values_s
216 {
217 part_header_t *head;
218 uint16_t *num_values;
219 uint8_t *values_types;
220 value_t *values;
221 };
222 typedef struct part_values_s part_values_t;
224 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
225 * 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
226 * +-------------------------------+-------------------------------+
227 * ! Type ! Length !
228 * +-------------------------------+-------------------------------+
229 * ! Hash (Bits 0 - 31) !
230 * : : :
231 * ! Hash (Bits 224 - 255) !
232 * +---------------------------------------------------------------+
233 */
234 /* Minimum size */
235 #define PART_SIGNATURE_SHA256_SIZE 36
236 struct part_signature_sha256_s
237 {
238 part_header_t head;
239 unsigned char hash[32];
240 char *username;
241 };
242 typedef struct part_signature_sha256_s part_signature_sha256_t;
244 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
245 * 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
246 * +-------------------------------+-------------------------------+
247 * ! Type ! Length !
248 * +-------------------------------+-------------------------------+
249 * ! Original length ! Padding (0 - 15 bytes) !
250 * +-------------------------------+-------------------------------+
251 * ! Hash (Bits 0 - 31) !
252 * : : :
253 * ! Hash (Bits 128 - 159) !
254 * +---------------------------------------------------------------+
255 */
256 /* Minimum size */
257 #define PART_ENCRYPTION_AES256_SIZE 42
258 struct part_encryption_aes256_s
259 {
260 part_header_t head;
261 uint16_t username_length;
262 char *username;
263 unsigned char iv[16];
264 /* <encrypted> */
265 unsigned char hash[20];
266 /* <payload /> */
267 /* </encrypted> */
268 };
269 typedef struct part_encryption_aes256_s part_encryption_aes256_t;
271 struct receive_list_entry_s
272 {
273 char *data;
274 int data_len;
275 int fd;
276 struct receive_list_entry_s *next;
277 };
278 typedef struct receive_list_entry_s receive_list_entry_t;
280 /*
281 * Private variables
282 */
283 static int network_config_ttl = 0;
284 /* Ethernet - (IPv6 + UDP) = 1500 - (40 + 8) = 1452 */
285 static size_t network_config_packet_size = 1452;
286 static int network_config_forward = 0;
287 static int network_config_stats = 0;
289 static sockent_t *sending_sockets = NULL;
291 static receive_list_entry_t *receive_list_head = NULL;
292 static receive_list_entry_t *receive_list_tail = NULL;
293 static pthread_mutex_t receive_list_lock = PTHREAD_MUTEX_INITIALIZER;
294 static pthread_cond_t receive_list_cond = PTHREAD_COND_INITIALIZER;
295 static uint64_t receive_list_length = 0;
297 static sockent_t *listen_sockets = NULL;
298 static struct pollfd *listen_sockets_pollfd = NULL;
299 static size_t listen_sockets_num = 0;
301 /* The receive and dispatch threads will run as long as `listen_loop' is set to
302 * zero. */
303 static int listen_loop = 0;
304 static int receive_thread_running = 0;
305 static pthread_t receive_thread_id;
306 static int dispatch_thread_running = 0;
307 static pthread_t dispatch_thread_id;
309 /* Buffer in which to-be-sent network packets are constructed. */
310 static char *send_buffer;
311 static char *send_buffer_ptr;
312 static int send_buffer_fill;
313 static cdtime_t send_buffer_last_update;
314 static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
315 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
317 /* XXX: These counters are incremented from one place only. The spot in which
318 * the values are incremented is either only reachable by one thread (the
319 * dispatch thread, for example) or locked by some lock (send_buffer_lock for
320 * example). Only if neither is true, the stats_lock is acquired. The counters
321 * are always read without holding a lock in the hope that writing 8 bytes to
322 * memory is an atomic operation. */
323 static derive_t stats_octets_rx = 0;
324 static derive_t stats_octets_tx = 0;
325 static derive_t stats_packets_rx = 0;
326 static derive_t stats_packets_tx = 0;
327 static derive_t stats_values_dispatched = 0;
328 static derive_t stats_values_not_dispatched = 0;
329 static derive_t stats_values_sent = 0;
330 static derive_t stats_values_not_sent = 0;
331 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
333 /*
334 * Private functions
335 */
336 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
337 {
338 uint64_t time_sent = 0;
339 int status;
341 status = uc_meta_data_get_unsigned_int (vl,
342 "network:time_sent", &time_sent);
344 /* This is a value we already sent. Don't allow it to be received again in
345 * order to avoid looping. */
346 if ((status == 0) && (time_sent >= ((uint64_t) vl->time)))
347 return (0);
349 return (1);
350 } /* }}} _Bool check_receive_okay */
352 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
353 {
354 _Bool received = 0;
355 int status;
357 if (network_config_forward != 0)
358 return (1);
360 if (vl->meta == NULL)
361 return (1);
363 status = meta_data_get_boolean (vl->meta, "network:received", &received);
364 if (status == -ENOENT)
365 return (1);
366 else if (status != 0)
367 {
368 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
369 "with status %i.", status);
370 return (1);
371 }
373 /* By default, only *send* value lists that were not *received* by the
374 * network plugin. */
375 return (!received);
376 } /* }}} _Bool check_send_okay */
378 static _Bool check_notify_received (const notification_t *n) /* {{{ */
379 {
380 notification_meta_t *ptr;
382 for (ptr = n->meta; ptr != NULL; ptr = ptr->next)
383 if ((strcmp ("network:received", ptr->name) == 0)
384 && (ptr->type == NM_TYPE_BOOLEAN))
385 return ((_Bool) ptr->nm_value.nm_boolean);
387 return (0);
388 } /* }}} _Bool check_notify_received */
390 static _Bool check_send_notify_okay (const notification_t *n) /* {{{ */
391 {
392 static c_complain_t complain_forwarding = C_COMPLAIN_INIT_STATIC;
393 _Bool received = 0;
395 if (n->meta == NULL)
396 return (1);
398 received = check_notify_received (n);
400 if (network_config_forward && received)
401 {
402 c_complain_once (LOG_ERR, &complain_forwarding,
403 "network plugin: A notification has been received via the network "
404 "and forwarding is enabled. Forwarding of notifications is currently "
405 "not supported, because there is not loop-deteciton available. "
406 "Please contact the collectd mailing list if you need this "
407 "feature.");
408 }
410 /* By default, only *send* value lists that were not *received* by the
411 * network plugin. */
412 return (!received);
413 } /* }}} _Bool check_send_notify_okay */
415 static int network_dispatch_values (value_list_t *vl, /* {{{ */
416 const char *username)
417 {
418 int status;
420 if ((vl->time <= 0)
421 || (strlen (vl->host) <= 0)
422 || (strlen (vl->plugin) <= 0)
423 || (strlen (vl->type) <= 0))
424 return (-EINVAL);
426 if (!check_receive_okay (vl))
427 {
428 #if COLLECT_DEBUG
429 char name[6*DATA_MAX_NAME_LEN];
430 FORMAT_VL (name, sizeof (name), vl);
431 name[sizeof (name) - 1] = 0;
432 DEBUG ("network plugin: network_dispatch_values: "
433 "NOT dispatching %s.", name);
434 #endif
435 stats_values_not_dispatched++;
436 return (0);
437 }
439 assert (vl->meta == NULL);
441 vl->meta = meta_data_create ();
442 if (vl->meta == NULL)
443 {
444 ERROR ("network plugin: meta_data_create failed.");
445 return (-ENOMEM);
446 }
448 status = meta_data_add_boolean (vl->meta, "network:received", 1);
449 if (status != 0)
450 {
451 ERROR ("network plugin: meta_data_add_boolean failed.");
452 meta_data_destroy (vl->meta);
453 vl->meta = NULL;
454 return (status);
455 }
457 if (username != NULL)
458 {
459 status = meta_data_add_string (vl->meta, "network:username", username);
460 if (status != 0)
461 {
462 ERROR ("network plugin: meta_data_add_string failed.");
463 meta_data_destroy (vl->meta);
464 vl->meta = NULL;
465 return (status);
466 }
467 }
469 plugin_dispatch_values (vl);
470 stats_values_dispatched++;
472 meta_data_destroy (vl->meta);
473 vl->meta = NULL;
475 return (0);
476 } /* }}} int network_dispatch_values */
478 static int network_dispatch_notification (notification_t *n) /* {{{ */
479 {
480 int status;
482 assert (n->meta == NULL);
484 status = plugin_notification_meta_add_boolean (n, "network:received", 1);
485 if (status != 0)
486 {
487 ERROR ("network plugin: plugin_notification_meta_add_boolean failed.");
488 plugin_notification_meta_free (n->meta);
489 n->meta = NULL;
490 return (status);
491 }
493 status = plugin_dispatch_notification (n);
495 plugin_notification_meta_free (n->meta);
496 n->meta = NULL;
498 return (status);
499 } /* }}} int network_dispatch_notification */
501 #if HAVE_LIBGCRYPT
502 static void network_init_gcrypt (void) /* {{{ */
503 {
504 /* http://lists.gnupg.org/pipermail/gcrypt-devel/2003-August/000458.html
505 * Because you can't know in a library whether another library has
506 * already initialized the library */
507 if (gcry_control (GCRYCTL_ANY_INITIALIZATION_P))
508 return;
510 /* http://www.gnupg.org/documentation/manuals/gcrypt/Multi_002dThreading.html
511 * To ensure thread-safety, it's important to set GCRYCTL_SET_THREAD_CBS
512 * *before* initalizing Libgcrypt with gcry_check_version(), which itself must
513 * be called before any other gcry_* function. GCRYCTL_ANY_INITIALIZATION_P
514 * above doesn't count, as it doesn't implicitly initalize Libgcrypt.
515 *
516 * tl;dr: keep all these gry_* statements in this exact order please. */
517 # if GCRYPT_VERSION_NUMBER < 0x010600
518 gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
519 # endif
520 gcry_check_version (NULL);
521 gcry_control (GCRYCTL_INIT_SECMEM, 32768);
522 gcry_control (GCRYCTL_INITIALIZATION_FINISHED);
523 } /* }}} void network_init_gcrypt */
525 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
526 const void *iv, size_t iv_size, const char *username)
527 {
528 gcry_error_t err;
529 gcry_cipher_hd_t *cyper_ptr;
530 unsigned char password_hash[32];
532 if (se->type == SOCKENT_TYPE_CLIENT)
533 {
534 cyper_ptr = &se->data.client.cypher;
535 memcpy (password_hash, se->data.client.password_hash,
536 sizeof (password_hash));
537 }
538 else
539 {
540 char *secret;
542 cyper_ptr = &se->data.server.cypher;
544 if (username == NULL)
545 return (NULL);
547 secret = fbh_get (se->data.server.userdb, username);
548 if (secret == NULL)
549 return (NULL);
551 gcry_md_hash_buffer (GCRY_MD_SHA256,
552 password_hash,
553 secret, strlen (secret));
555 sfree (secret);
556 }
558 if (*cyper_ptr == NULL)
559 {
560 err = gcry_cipher_open (cyper_ptr,
561 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
562 if (err != 0)
563 {
564 ERROR ("network plugin: gcry_cipher_open returned: %s",
565 gcry_strerror (err));
566 *cyper_ptr = NULL;
567 return (NULL);
568 }
569 }
570 else
571 {
572 gcry_cipher_reset (*cyper_ptr);
573 }
574 assert (*cyper_ptr != NULL);
576 err = gcry_cipher_setkey (*cyper_ptr,
577 password_hash, sizeof (password_hash));
578 if (err != 0)
579 {
580 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
581 gcry_strerror (err));
582 gcry_cipher_close (*cyper_ptr);
583 *cyper_ptr = NULL;
584 return (NULL);
585 }
587 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
588 if (err != 0)
589 {
590 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
591 gcry_strerror (err));
592 gcry_cipher_close (*cyper_ptr);
593 *cyper_ptr = NULL;
594 return (NULL);
595 }
597 return (*cyper_ptr);
598 } /* }}} int network_get_aes256_cypher */
599 #endif /* HAVE_LIBGCRYPT */
601 static int write_part_values (char **ret_buffer, int *ret_buffer_len,
602 const data_set_t *ds, const value_list_t *vl)
603 {
604 char *packet_ptr;
605 int packet_len;
606 int num_values;
608 part_header_t pkg_ph;
609 uint16_t pkg_num_values;
610 uint8_t *pkg_values_types;
611 value_t *pkg_values;
613 int offset;
614 int i;
616 num_values = vl->values_len;
617 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
618 + (num_values * sizeof (uint8_t))
619 + (num_values * sizeof (value_t));
621 if (*ret_buffer_len < packet_len)
622 return (-1);
624 pkg_values_types = (uint8_t *) malloc (num_values * sizeof (uint8_t));
625 if (pkg_values_types == NULL)
626 {
627 ERROR ("network plugin: write_part_values: malloc failed.");
628 return (-1);
629 }
631 pkg_values = (value_t *) malloc (num_values * sizeof (value_t));
632 if (pkg_values == NULL)
633 {
634 free (pkg_values_types);
635 ERROR ("network plugin: write_part_values: malloc failed.");
636 return (-1);
637 }
639 pkg_ph.type = htons (TYPE_VALUES);
640 pkg_ph.length = htons (packet_len);
642 pkg_num_values = htons ((uint16_t) vl->values_len);
644 for (i = 0; i < num_values; i++)
645 {
646 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
647 switch (ds->ds[i].type)
648 {
649 case DS_TYPE_COUNTER:
650 pkg_values[i].counter = htonll (vl->values[i].counter);
651 break;
653 case DS_TYPE_GAUGE:
654 pkg_values[i].gauge = htond (vl->values[i].gauge);
655 break;
657 case DS_TYPE_DERIVE:
658 pkg_values[i].derive = htonll (vl->values[i].derive);
659 break;
661 case DS_TYPE_ABSOLUTE:
662 pkg_values[i].absolute = htonll (vl->values[i].absolute);
663 break;
665 default:
666 free (pkg_values_types);
667 free (pkg_values);
668 ERROR ("network plugin: write_part_values: "
669 "Unknown data source type: %i",
670 ds->ds[i].type);
671 return (-1);
672 } /* switch (ds->ds[i].type) */
673 } /* for (num_values) */
675 /*
676 * Use `memcpy' to write everything to the buffer, because the pointer
677 * may be unaligned and some architectures, such as SPARC, can't handle
678 * that.
679 */
680 packet_ptr = *ret_buffer;
681 offset = 0;
682 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
683 offset += sizeof (pkg_ph);
684 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
685 offset += sizeof (pkg_num_values);
686 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
687 offset += num_values * sizeof (uint8_t);
688 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
689 offset += num_values * sizeof (value_t);
691 assert (offset == packet_len);
693 *ret_buffer = packet_ptr + packet_len;
694 *ret_buffer_len -= packet_len;
696 free (pkg_values_types);
697 free (pkg_values);
699 return (0);
700 } /* int write_part_values */
702 static int write_part_number (char **ret_buffer, int *ret_buffer_len,
703 int type, uint64_t value)
704 {
705 char *packet_ptr;
706 int packet_len;
708 part_header_t pkg_head;
709 uint64_t pkg_value;
711 int offset;
713 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
715 if (*ret_buffer_len < packet_len)
716 return (-1);
718 pkg_head.type = htons (type);
719 pkg_head.length = htons (packet_len);
720 pkg_value = htonll (value);
722 packet_ptr = *ret_buffer;
723 offset = 0;
724 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
725 offset += sizeof (pkg_head);
726 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
727 offset += sizeof (pkg_value);
729 assert (offset == packet_len);
731 *ret_buffer = packet_ptr + packet_len;
732 *ret_buffer_len -= packet_len;
734 return (0);
735 } /* int write_part_number */
737 static int write_part_string (char **ret_buffer, int *ret_buffer_len,
738 int type, const char *str, int str_len)
739 {
740 char *buffer;
741 int buffer_len;
743 uint16_t pkg_type;
744 uint16_t pkg_length;
746 int offset;
748 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
749 if (*ret_buffer_len < buffer_len)
750 return (-1);
752 pkg_type = htons (type);
753 pkg_length = htons (buffer_len);
755 buffer = *ret_buffer;
756 offset = 0;
757 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
758 offset += sizeof (pkg_type);
759 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
760 offset += sizeof (pkg_length);
761 memcpy (buffer + offset, str, str_len);
762 offset += str_len;
763 memset (buffer + offset, '\0', 1);
764 offset += 1;
766 assert (offset == buffer_len);
768 *ret_buffer = buffer + buffer_len;
769 *ret_buffer_len -= buffer_len;
771 return (0);
772 } /* int write_part_string */
774 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
775 value_t **ret_values, int *ret_num_values)
776 {
777 char *buffer = *ret_buffer;
778 size_t buffer_len = *ret_buffer_len;
780 uint16_t tmp16;
781 size_t exp_size;
782 int i;
784 uint16_t pkg_length;
785 uint16_t pkg_type;
786 uint16_t pkg_numval;
788 uint8_t *pkg_types;
789 value_t *pkg_values;
791 if (buffer_len < 15)
792 {
793 NOTICE ("network plugin: packet is too short: "
794 "buffer_len = %zu", buffer_len);
795 return (-1);
796 }
798 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
799 buffer += sizeof (tmp16);
800 pkg_type = ntohs (tmp16);
802 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
803 buffer += sizeof (tmp16);
804 pkg_length = ntohs (tmp16);
806 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
807 buffer += sizeof (tmp16);
808 pkg_numval = ntohs (tmp16);
810 assert (pkg_type == TYPE_VALUES);
812 exp_size = 3 * sizeof (uint16_t)
813 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
814 if (buffer_len < exp_size)
815 {
816 WARNING ("network plugin: parse_part_values: "
817 "Packet too short: "
818 "Chunk of size %zu expected, "
819 "but buffer has only %zu bytes left.",
820 exp_size, buffer_len);
821 return (-1);
822 }
824 if (pkg_length != exp_size)
825 {
826 WARNING ("network plugin: parse_part_values: "
827 "Length and number of values "
828 "in the packet don't match.");
829 return (-1);
830 }
832 pkg_types = (uint8_t *) malloc (pkg_numval * sizeof (uint8_t));
833 pkg_values = (value_t *) malloc (pkg_numval * sizeof (value_t));
834 if ((pkg_types == NULL) || (pkg_values == NULL))
835 {
836 sfree (pkg_types);
837 sfree (pkg_values);
838 ERROR ("network plugin: parse_part_values: malloc failed.");
839 return (-1);
840 }
842 memcpy ((void *) pkg_types, (void *) buffer, pkg_numval * sizeof (uint8_t));
843 buffer += pkg_numval * sizeof (uint8_t);
844 memcpy ((void *) pkg_values, (void *) buffer, pkg_numval * sizeof (value_t));
845 buffer += pkg_numval * sizeof (value_t);
847 for (i = 0; i < pkg_numval; i++)
848 {
849 switch (pkg_types[i])
850 {
851 case DS_TYPE_COUNTER:
852 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
853 break;
855 case DS_TYPE_GAUGE:
856 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
857 break;
859 case DS_TYPE_DERIVE:
860 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
861 break;
863 case DS_TYPE_ABSOLUTE:
864 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
865 break;
867 default:
868 NOTICE ("network plugin: parse_part_values: "
869 "Don't know how to handle data source type %"PRIu8,
870 pkg_types[i]);
871 sfree (pkg_types);
872 sfree (pkg_values);
873 return (-1);
874 } /* switch (pkg_types[i]) */
875 }
877 *ret_buffer = buffer;
878 *ret_buffer_len = buffer_len - pkg_length;
879 *ret_num_values = pkg_numval;
880 *ret_values = pkg_values;
882 sfree (pkg_types);
884 return (0);
885 } /* int parse_part_values */
887 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
888 uint64_t *value)
889 {
890 char *buffer = *ret_buffer;
891 size_t buffer_len = *ret_buffer_len;
893 uint16_t tmp16;
894 uint64_t tmp64;
895 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
897 uint16_t pkg_length;
899 if (buffer_len < exp_size)
900 {
901 WARNING ("network plugin: parse_part_number: "
902 "Packet too short: "
903 "Chunk of size %zu expected, "
904 "but buffer has only %zu bytes left.",
905 exp_size, buffer_len);
906 return (-1);
907 }
909 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
910 buffer += sizeof (tmp16);
911 /* pkg_type = ntohs (tmp16); */
913 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
914 buffer += sizeof (tmp16);
915 pkg_length = ntohs (tmp16);
917 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
918 buffer += sizeof (tmp64);
919 *value = ntohll (tmp64);
921 *ret_buffer = buffer;
922 *ret_buffer_len = buffer_len - pkg_length;
924 return (0);
925 } /* int parse_part_number */
927 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
928 char *output, size_t const output_len)
929 {
930 char *buffer = *ret_buffer;
931 size_t buffer_len = *ret_buffer_len;
933 uint16_t tmp16;
934 size_t const header_size = 2 * sizeof (uint16_t);
936 uint16_t pkg_length;
937 size_t payload_size;
939 if (output_len <= 0)
940 return (EINVAL);
942 if (buffer_len < header_size)
943 {
944 WARNING ("network plugin: parse_part_string: "
945 "Packet too short: "
946 "Chunk of at least size %zu expected, "
947 "but buffer has only %zu bytes left.",
948 header_size, buffer_len);
949 return (-1);
950 }
952 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
953 buffer += sizeof (tmp16);
954 /* pkg_type = ntohs (tmp16); */
956 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
957 buffer += sizeof (tmp16);
958 pkg_length = ntohs (tmp16);
959 payload_size = ((size_t) pkg_length) - header_size;
961 /* Check that packet fits in the input buffer */
962 if (pkg_length > buffer_len)
963 {
964 WARNING ("network plugin: parse_part_string: "
965 "Packet too big: "
966 "Chunk of size %"PRIu16" received, "
967 "but buffer has only %zu bytes left.",
968 pkg_length, buffer_len);
969 return (-1);
970 }
972 /* Check that pkg_length is in the valid range */
973 if (pkg_length <= header_size)
974 {
975 WARNING ("network plugin: parse_part_string: "
976 "Packet too short: "
977 "Header claims this packet is only %hu "
978 "bytes long.", pkg_length);
979 return (-1);
980 }
982 /* Check that the package data fits into the output buffer.
983 * The previous if-statement ensures that:
984 * `pkg_length > header_size' */
985 if (output_len < payload_size)
986 {
987 WARNING ("network plugin: parse_part_string: "
988 "Buffer too small: "
989 "Output buffer holds %zu bytes, "
990 "which is too small to hold the received "
991 "%zu byte string.",
992 output_len, payload_size);
993 return (-1);
994 }
996 /* All sanity checks successfull, let's copy the data over */
997 memcpy ((void *) output, (void *) buffer, payload_size);
998 buffer += payload_size;
1000 /* For some very weird reason '\0' doesn't do the trick on SPARC in
1001 * this statement. */
1002 if (output[payload_size - 1] != 0)
1003 {
1004 WARNING ("network plugin: parse_part_string: "
1005 "Received string does not end "
1006 "with a NULL-byte.");
1007 return (-1);
1008 }
1010 *ret_buffer = buffer;
1011 *ret_buffer_len = buffer_len - pkg_length;
1013 return (0);
1014 } /* int parse_part_string */
1016 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
1017 * parse_packet and vice versa. */
1018 #define PP_SIGNED 0x01
1019 #define PP_ENCRYPTED 0x02
1020 static int parse_packet (sockent_t *se,
1021 void *buffer, size_t buffer_size, int flags,
1022 const char *username);
1024 #define BUFFER_READ(p,s) do { \
1025 memcpy ((p), buffer + buffer_offset, (s)); \
1026 buffer_offset += (s); \
1027 } while (0)
1029 #if HAVE_LIBGCRYPT
1030 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1031 void **ret_buffer, size_t *ret_buffer_len, int flags)
1032 {
1033 static c_complain_t complain_no_users = C_COMPLAIN_INIT_STATIC;
1035 char *buffer;
1036 size_t buffer_len;
1037 size_t buffer_offset;
1039 size_t username_len;
1040 char *secret;
1042 part_signature_sha256_t pss;
1043 uint16_t pss_head_length;
1044 char hash[sizeof (pss.hash)];
1046 gcry_md_hd_t hd;
1047 gcry_error_t err;
1048 unsigned char *hash_ptr;
1050 buffer = *ret_buffer;
1051 buffer_len = *ret_buffer_len;
1052 buffer_offset = 0;
1054 if (se->data.server.userdb == NULL)
1055 {
1056 c_complain (LOG_NOTICE, &complain_no_users,
1057 "network plugin: Received signed network packet but can't verify it "
1058 "because no user DB has been configured. Will accept it.");
1059 return (0);
1060 }
1062 /* Check if the buffer has enough data for this structure. */
1063 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
1064 return (-ENOMEM);
1066 /* Read type and length header */
1067 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1068 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1069 pss_head_length = ntohs (pss.head.length);
1071 /* Check if the `pss_head_length' is within bounds. */
1072 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
1073 || (pss_head_length > buffer_len))
1074 {
1075 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
1076 return (-1);
1077 }
1079 /* Copy the hash. */
1080 BUFFER_READ (pss.hash, sizeof (pss.hash));
1082 /* Calculate username length (without null byte) and allocate memory */
1083 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
1084 pss.username = malloc (username_len + 1);
1085 if (pss.username == NULL)
1086 return (-ENOMEM);
1088 /* Read the username */
1089 BUFFER_READ (pss.username, username_len);
1090 pss.username[username_len] = 0;
1092 assert (buffer_offset == pss_head_length);
1094 /* Query the password */
1095 secret = fbh_get (se->data.server.userdb, pss.username);
1096 if (secret == NULL)
1097 {
1098 ERROR ("network plugin: Unknown user: %s", pss.username);
1099 sfree (pss.username);
1100 return (-ENOENT);
1101 }
1103 /* Create a hash device and check the HMAC */
1104 hd = NULL;
1105 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
1106 if (err != 0)
1107 {
1108 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
1109 gcry_strerror (err));
1110 sfree (secret);
1111 sfree (pss.username);
1112 return (-1);
1113 }
1115 err = gcry_md_setkey (hd, secret, strlen (secret));
1116 if (err != 0)
1117 {
1118 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
1119 gcry_md_close (hd);
1120 sfree (secret);
1121 sfree (pss.username);
1122 return (-1);
1123 }
1125 gcry_md_write (hd,
1126 buffer + PART_SIGNATURE_SHA256_SIZE,
1127 buffer_len - PART_SIGNATURE_SHA256_SIZE);
1128 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
1129 if (hash_ptr == NULL)
1130 {
1131 ERROR ("network plugin: gcry_md_read failed.");
1132 gcry_md_close (hd);
1133 sfree (secret);
1134 sfree (pss.username);
1135 return (-1);
1136 }
1137 memcpy (hash, hash_ptr, sizeof (hash));
1139 /* Clean up */
1140 gcry_md_close (hd);
1141 hd = NULL;
1143 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1144 {
1145 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1146 "Hash mismatch.");
1147 }
1148 else
1149 {
1150 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1151 flags | PP_SIGNED, pss.username);
1152 }
1154 sfree (secret);
1155 sfree (pss.username);
1157 *ret_buffer = buffer + buffer_len;
1158 *ret_buffer_len = 0;
1160 return (0);
1161 } /* }}} int parse_part_sign_sha256 */
1162 /* #endif HAVE_LIBGCRYPT */
1164 #else /* if !HAVE_LIBGCRYPT */
1165 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1166 void **ret_buffer, size_t *ret_buffer_size, int flags)
1167 {
1168 static int warning_has_been_printed = 0;
1170 char *buffer;
1171 size_t buffer_size;
1172 size_t buffer_offset;
1173 uint16_t part_len;
1175 part_signature_sha256_t pss;
1177 buffer = *ret_buffer;
1178 buffer_size = *ret_buffer_size;
1179 buffer_offset = 0;
1181 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1182 return (-ENOMEM);
1184 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1185 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1186 part_len = ntohs (pss.head.length);
1188 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1189 || (part_len > buffer_size))
1190 return (-EINVAL);
1192 if (warning_has_been_printed == 0)
1193 {
1194 WARNING ("network plugin: Received signed packet, but the network "
1195 "plugin was not linked with libgcrypt, so I cannot "
1196 "verify the signature. The packet will be accepted.");
1197 warning_has_been_printed = 1;
1198 }
1200 parse_packet (se, buffer + part_len, buffer_size - part_len, flags,
1201 /* username = */ NULL);
1203 *ret_buffer = buffer + buffer_size;
1204 *ret_buffer_size = 0;
1206 return (0);
1207 } /* }}} int parse_part_sign_sha256 */
1208 #endif /* !HAVE_LIBGCRYPT */
1210 #if HAVE_LIBGCRYPT
1211 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1212 void **ret_buffer, size_t *ret_buffer_len,
1213 int flags)
1214 {
1215 char *buffer = *ret_buffer;
1216 size_t buffer_len = *ret_buffer_len;
1217 size_t payload_len;
1218 size_t part_size;
1219 size_t buffer_offset;
1220 uint16_t username_len;
1221 part_encryption_aes256_t pea;
1222 unsigned char hash[sizeof (pea.hash)];
1224 gcry_cipher_hd_t cypher;
1225 gcry_error_t err;
1227 /* Make sure at least the header if available. */
1228 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1229 {
1230 NOTICE ("network plugin: parse_part_encr_aes256: "
1231 "Discarding short packet.");
1232 return (-1);
1233 }
1235 buffer_offset = 0;
1237 /* Copy the unencrypted information into `pea'. */
1238 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1239 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1241 /* Check the `part size'. */
1242 part_size = ntohs (pea.head.length);
1243 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1244 || (part_size > buffer_len))
1245 {
1246 NOTICE ("network plugin: parse_part_encr_aes256: "
1247 "Discarding part with invalid size.");
1248 return (-1);
1249 }
1251 /* Read the username */
1252 BUFFER_READ (&username_len, sizeof (username_len));
1253 username_len = ntohs (username_len);
1255 if ((username_len <= 0)
1256 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1257 {
1258 NOTICE ("network plugin: parse_part_encr_aes256: "
1259 "Discarding part with invalid username length.");
1260 return (-1);
1261 }
1263 assert (username_len > 0);
1264 pea.username = malloc (username_len + 1);
1265 if (pea.username == NULL)
1266 return (-ENOMEM);
1267 BUFFER_READ (pea.username, username_len);
1268 pea.username[username_len] = 0;
1270 /* Last but not least, the initialization vector */
1271 BUFFER_READ (pea.iv, sizeof (pea.iv));
1273 /* Make sure we are at the right position */
1274 assert (buffer_offset == (username_len +
1275 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1277 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1278 pea.username);
1279 if (cypher == NULL)
1280 {
1281 sfree (pea.username);
1282 return (-1);
1283 }
1285 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1286 assert (payload_len > 0);
1288 /* Decrypt the packet in-place */
1289 err = gcry_cipher_decrypt (cypher,
1290 buffer + buffer_offset,
1291 part_size - buffer_offset,
1292 /* in = */ NULL, /* in len = */ 0);
1293 if (err != 0)
1294 {
1295 sfree (pea.username);
1296 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1297 gcry_strerror (err));
1298 return (-1);
1299 }
1301 /* Read the hash */
1302 BUFFER_READ (pea.hash, sizeof (pea.hash));
1304 /* Make sure we're at the right position - again */
1305 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1306 assert (buffer_offset == (part_size - payload_len));
1308 /* Check hash sum */
1309 memset (hash, 0, sizeof (hash));
1310 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1311 buffer + buffer_offset, payload_len);
1312 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1313 {
1314 sfree (pea.username);
1315 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1316 return (-1);
1317 }
1319 parse_packet (se, buffer + buffer_offset, payload_len,
1320 flags | PP_ENCRYPTED, pea.username);
1322 /* XXX: Free pea.username?!? */
1324 /* Update return values */
1325 *ret_buffer = buffer + part_size;
1326 *ret_buffer_len = buffer_len - part_size;
1328 sfree (pea.username);
1330 return (0);
1331 } /* }}} int parse_part_encr_aes256 */
1332 /* #endif HAVE_LIBGCRYPT */
1334 #else /* if !HAVE_LIBGCRYPT */
1335 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1336 void **ret_buffer, size_t *ret_buffer_size, int flags)
1337 {
1338 static int warning_has_been_printed = 0;
1340 char *buffer;
1341 size_t buffer_size;
1342 size_t buffer_offset;
1344 part_header_t ph;
1345 size_t ph_length;
1347 buffer = *ret_buffer;
1348 buffer_size = *ret_buffer_size;
1349 buffer_offset = 0;
1351 /* parse_packet assures this minimum size. */
1352 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1354 BUFFER_READ (&ph.type, sizeof (ph.type));
1355 BUFFER_READ (&ph.length, sizeof (ph.length));
1356 ph_length = ntohs (ph.length);
1358 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1359 || (ph_length > buffer_size))
1360 {
1361 ERROR ("network plugin: AES-256 encrypted part "
1362 "with invalid length received.");
1363 return (-1);
1364 }
1366 if (warning_has_been_printed == 0)
1367 {
1368 WARNING ("network plugin: Received encrypted packet, but the network "
1369 "plugin was not linked with libgcrypt, so I cannot "
1370 "decrypt it. The part will be discarded.");
1371 warning_has_been_printed = 1;
1372 }
1374 *ret_buffer += ph_length;
1375 *ret_buffer_size -= ph_length;
1377 return (0);
1378 } /* }}} int parse_part_encr_aes256 */
1379 #endif /* !HAVE_LIBGCRYPT */
1381 #undef BUFFER_READ
1383 static int parse_packet (sockent_t *se, /* {{{ */
1384 void *buffer, size_t buffer_size, int flags,
1385 const char *username)
1386 {
1387 int status;
1389 value_list_t vl = VALUE_LIST_INIT;
1390 notification_t n;
1392 #if HAVE_LIBGCRYPT
1393 int packet_was_signed = (flags & PP_SIGNED);
1394 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1395 int printed_ignore_warning = 0;
1396 #endif /* HAVE_LIBGCRYPT */
1399 memset (&vl, '\0', sizeof (vl));
1400 memset (&n, '\0', sizeof (n));
1401 status = 0;
1403 while ((status == 0) && (0 < buffer_size)
1404 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1405 {
1406 uint16_t pkg_length;
1407 uint16_t pkg_type;
1409 memcpy ((void *) &pkg_type,
1410 (void *) buffer,
1411 sizeof (pkg_type));
1412 memcpy ((void *) &pkg_length,
1413 (void *) (buffer + sizeof (pkg_type)),
1414 sizeof (pkg_length));
1416 pkg_length = ntohs (pkg_length);
1417 pkg_type = ntohs (pkg_type);
1419 if (pkg_length > buffer_size)
1420 break;
1421 /* Ensure that this loop terminates eventually */
1422 if (pkg_length < (2 * sizeof (uint16_t)))
1423 break;
1425 if (pkg_type == TYPE_ENCR_AES256)
1426 {
1427 status = parse_part_encr_aes256 (se,
1428 &buffer, &buffer_size, flags);
1429 if (status != 0)
1430 {
1431 ERROR ("network plugin: Decrypting AES256 "
1432 "part failed "
1433 "with status %i.", status);
1434 break;
1435 }
1436 }
1437 #if HAVE_LIBGCRYPT
1438 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1439 && (packet_was_encrypted == 0))
1440 {
1441 if (printed_ignore_warning == 0)
1442 {
1443 INFO ("network plugin: Unencrypted packet or "
1444 "part has been ignored.");
1445 printed_ignore_warning = 1;
1446 }
1447 buffer = ((char *) buffer) + pkg_length;
1448 continue;
1449 }
1450 #endif /* HAVE_LIBGCRYPT */
1451 else if (pkg_type == TYPE_SIGN_SHA256)
1452 {
1453 status = parse_part_sign_sha256 (se,
1454 &buffer, &buffer_size, flags);
1455 if (status != 0)
1456 {
1457 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1458 "signature failed "
1459 "with status %i.", status);
1460 break;
1461 }
1462 }
1463 #if HAVE_LIBGCRYPT
1464 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1465 && (packet_was_encrypted == 0)
1466 && (packet_was_signed == 0))
1467 {
1468 if (printed_ignore_warning == 0)
1469 {
1470 INFO ("network plugin: Unsigned packet or "
1471 "part has been ignored.");
1472 printed_ignore_warning = 1;
1473 }
1474 buffer = ((char *) buffer) + pkg_length;
1475 continue;
1476 }
1477 #endif /* HAVE_LIBGCRYPT */
1478 else if (pkg_type == TYPE_VALUES)
1479 {
1480 status = parse_part_values (&buffer, &buffer_size,
1481 &vl.values, &vl.values_len);
1482 if (status != 0)
1483 break;
1485 network_dispatch_values (&vl, username);
1487 sfree (vl.values);
1488 }
1489 else if (pkg_type == TYPE_TIME)
1490 {
1491 uint64_t tmp = 0;
1492 status = parse_part_number (&buffer, &buffer_size,
1493 &tmp);
1494 if (status == 0)
1495 {
1496 vl.time = TIME_T_TO_CDTIME_T (tmp);
1497 n.time = TIME_T_TO_CDTIME_T (tmp);
1498 }
1499 }
1500 else if (pkg_type == TYPE_TIME_HR)
1501 {
1502 uint64_t tmp = 0;
1503 status = parse_part_number (&buffer, &buffer_size,
1504 &tmp);
1505 if (status == 0)
1506 {
1507 vl.time = (cdtime_t) tmp;
1508 n.time = (cdtime_t) tmp;
1509 }
1510 }
1511 else if (pkg_type == TYPE_INTERVAL)
1512 {
1513 uint64_t tmp = 0;
1514 status = parse_part_number (&buffer, &buffer_size,
1515 &tmp);
1516 if (status == 0)
1517 vl.interval = TIME_T_TO_CDTIME_T (tmp);
1518 }
1519 else if (pkg_type == TYPE_INTERVAL_HR)
1520 {
1521 uint64_t tmp = 0;
1522 status = parse_part_number (&buffer, &buffer_size,
1523 &tmp);
1524 if (status == 0)
1525 vl.interval = (cdtime_t) tmp;
1526 }
1527 else if (pkg_type == TYPE_HOST)
1528 {
1529 status = parse_part_string (&buffer, &buffer_size,
1530 vl.host, sizeof (vl.host));
1531 if (status == 0)
1532 sstrncpy (n.host, vl.host, sizeof (n.host));
1533 }
1534 else if (pkg_type == TYPE_PLUGIN)
1535 {
1536 status = parse_part_string (&buffer, &buffer_size,
1537 vl.plugin, sizeof (vl.plugin));
1538 if (status == 0)
1539 sstrncpy (n.plugin, vl.plugin,
1540 sizeof (n.plugin));
1541 }
1542 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1543 {
1544 status = parse_part_string (&buffer, &buffer_size,
1545 vl.plugin_instance,
1546 sizeof (vl.plugin_instance));
1547 if (status == 0)
1548 sstrncpy (n.plugin_instance,
1549 vl.plugin_instance,
1550 sizeof (n.plugin_instance));
1551 }
1552 else if (pkg_type == TYPE_TYPE)
1553 {
1554 status = parse_part_string (&buffer, &buffer_size,
1555 vl.type, sizeof (vl.type));
1556 if (status == 0)
1557 sstrncpy (n.type, vl.type, sizeof (n.type));
1558 }
1559 else if (pkg_type == TYPE_TYPE_INSTANCE)
1560 {
1561 status = parse_part_string (&buffer, &buffer_size,
1562 vl.type_instance,
1563 sizeof (vl.type_instance));
1564 if (status == 0)
1565 sstrncpy (n.type_instance, vl.type_instance,
1566 sizeof (n.type_instance));
1567 }
1568 else if (pkg_type == TYPE_MESSAGE)
1569 {
1570 status = parse_part_string (&buffer, &buffer_size,
1571 n.message, sizeof (n.message));
1573 if (status != 0)
1574 {
1575 /* do nothing */
1576 }
1577 else if ((n.severity != NOTIF_FAILURE)
1578 && (n.severity != NOTIF_WARNING)
1579 && (n.severity != NOTIF_OKAY))
1580 {
1581 INFO ("network plugin: "
1582 "Ignoring notification with "
1583 "unknown severity %i.",
1584 n.severity);
1585 }
1586 else if (n.time <= 0)
1587 {
1588 INFO ("network plugin: "
1589 "Ignoring notification with "
1590 "time == 0.");
1591 }
1592 else if (strlen (n.message) <= 0)
1593 {
1594 INFO ("network plugin: "
1595 "Ignoring notification with "
1596 "an empty message.");
1597 }
1598 else
1599 {
1600 network_dispatch_notification (&n);
1601 }
1602 }
1603 else if (pkg_type == TYPE_SEVERITY)
1604 {
1605 uint64_t tmp = 0;
1606 status = parse_part_number (&buffer, &buffer_size,
1607 &tmp);
1608 if (status == 0)
1609 n.severity = (int) tmp;
1610 }
1611 else
1612 {
1613 DEBUG ("network plugin: parse_packet: Unknown part"
1614 " type: 0x%04hx", pkg_type);
1615 buffer = ((char *) buffer) + pkg_length;
1616 }
1617 } /* while (buffer_size > sizeof (part_header_t)) */
1619 if (status == 0 && buffer_size > 0)
1620 WARNING ("network plugin: parse_packet: Received truncated "
1621 "packet, try increasing `MaxPacketSize'");
1623 return (status);
1624 } /* }}} int parse_packet */
1626 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1627 {
1628 if (sec->fd >= 0)
1629 {
1630 close (sec->fd);
1631 sec->fd = -1;
1632 }
1633 sfree (sec->addr);
1634 #if HAVE_LIBGCRYPT
1635 sfree (sec->username);
1636 sfree (sec->password);
1637 if (sec->cypher != NULL)
1638 gcry_cipher_close (sec->cypher);
1639 #endif
1640 } /* }}} void free_sockent_client */
1642 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1643 {
1644 size_t i;
1646 for (i = 0; i < ses->fd_num; i++)
1647 {
1648 if (ses->fd[i] >= 0)
1649 {
1650 close (ses->fd[i]);
1651 ses->fd[i] = -1;
1652 }
1653 }
1655 sfree (ses->fd);
1656 #if HAVE_LIBGCRYPT
1657 sfree (ses->auth_file);
1658 fbh_destroy (ses->userdb);
1659 if (ses->cypher != NULL)
1660 gcry_cipher_close (ses->cypher);
1661 #endif
1662 } /* }}} void free_sockent_server */
1664 static void sockent_destroy (sockent_t *se) /* {{{ */
1665 {
1666 sockent_t *next;
1668 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1670 while (se != NULL)
1671 {
1672 next = se->next;
1674 sfree (se->node);
1675 sfree (se->service);
1677 if (se->type == SOCKENT_TYPE_CLIENT)
1678 free_sockent_client (&se->data.client);
1679 else
1680 free_sockent_server (&se->data.server);
1682 sfree (se);
1683 se = next;
1684 }
1685 } /* }}} void sockent_destroy */
1687 /*
1688 * int network_set_ttl
1689 *
1690 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1691 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1692 *
1693 * The `struct addrinfo' is used to destinguish between unicast and multicast
1694 * sockets.
1695 */
1696 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1697 {
1698 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1699 network_config_ttl);
1701 assert (se->type == SOCKENT_TYPE_CLIENT);
1703 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1704 return (-1);
1706 if (ai->ai_family == AF_INET)
1707 {
1708 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1709 int optname;
1711 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1712 optname = IP_MULTICAST_TTL;
1713 else
1714 optname = IP_TTL;
1716 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1717 &network_config_ttl,
1718 sizeof (network_config_ttl)) != 0)
1719 {
1720 char errbuf[1024];
1721 ERROR ("network plugin: setsockopt (ipv4-ttl): %s",
1722 sstrerror (errno, errbuf, sizeof (errbuf)));
1723 return (-1);
1724 }
1725 }
1726 else if (ai->ai_family == AF_INET6)
1727 {
1728 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1729 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1730 int optname;
1732 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1733 optname = IPV6_MULTICAST_HOPS;
1734 else
1735 optname = IPV6_UNICAST_HOPS;
1737 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1738 &network_config_ttl,
1739 sizeof (network_config_ttl)) != 0)
1740 {
1741 char errbuf[1024];
1742 ERROR ("network plugin: setsockopt(ipv6-ttl): %s",
1743 sstrerror (errno, errbuf,
1744 sizeof (errbuf)));
1745 return (-1);
1746 }
1747 }
1749 return (0);
1750 } /* int network_set_ttl */
1752 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1753 {
1754 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1755 se->interface);
1757 assert (se->type == SOCKENT_TYPE_CLIENT);
1759 if (ai->ai_family == AF_INET)
1760 {
1761 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1763 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1764 {
1765 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1766 /* If possible, use the "ip_mreqn" structure which has
1767 * an "interface index" member. Using the interface
1768 * index is preferred here, because of its similarity
1769 * to the way IPv6 handles this. Unfortunately, it
1770 * appears not to be portable. */
1771 struct ip_mreqn mreq;
1773 memset (&mreq, 0, sizeof (mreq));
1774 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1775 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1776 mreq.imr_ifindex = se->interface;
1777 #else
1778 struct ip_mreq mreq;
1780 memset (&mreq, 0, sizeof (mreq));
1781 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1782 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1783 #endif
1785 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1786 &mreq, sizeof (mreq)) != 0)
1787 {
1788 char errbuf[1024];
1789 ERROR ("network plugin: setsockopt (ipv4-multicast-if): %s",
1790 sstrerror (errno, errbuf, sizeof (errbuf)));
1791 return (-1);
1792 }
1794 return (0);
1795 }
1796 }
1797 else if (ai->ai_family == AF_INET6)
1798 {
1799 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1801 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1802 {
1803 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1804 &se->interface,
1805 sizeof (se->interface)) != 0)
1806 {
1807 char errbuf[1024];
1808 ERROR ("network plugin: setsockopt (ipv6-multicast-if): %s",
1809 sstrerror (errno, errbuf,
1810 sizeof (errbuf)));
1811 return (-1);
1812 }
1814 return (0);
1815 }
1816 }
1818 /* else: Not a multicast interface. */
1819 if (se->interface != 0)
1820 {
1821 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1822 char interface_name[IFNAMSIZ];
1824 if (if_indextoname (se->interface, interface_name) == NULL)
1825 return (-1);
1827 DEBUG ("network plugin: Binding socket to interface %s", interface_name);
1829 if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
1830 interface_name,
1831 sizeof(interface_name)) == -1 )
1832 {
1833 char errbuf[1024];
1834 ERROR ("network plugin: setsockopt (bind-if): %s",
1835 sstrerror (errno, errbuf, sizeof (errbuf)));
1836 return (-1);
1837 }
1838 /* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1840 #else
1841 WARNING ("network plugin: Cannot set the interface on a unicast "
1842 "socket because "
1843 # if !defined(SO_BINDTODEVICE)
1844 "the \"SO_BINDTODEVICE\" socket option "
1845 # else
1846 "the \"if_indextoname\" function "
1847 # endif
1848 "is not available on your system.");
1849 #endif
1851 }
1853 return (0);
1854 } /* }}} network_set_interface */
1856 static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
1857 {
1858 #if KERNEL_SOLARIS
1859 char loop = 0;
1860 #else
1861 int loop = 0;
1862 #endif
1863 int yes = 1;
1865 /* allow multiple sockets to use the same PORT number */
1866 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1867 &yes, sizeof(yes)) == -1) {
1868 char errbuf[1024];
1869 ERROR ("network plugin: setsockopt (reuseaddr): %s",
1870 sstrerror (errno, errbuf, sizeof (errbuf)));
1871 return (-1);
1872 }
1874 DEBUG ("fd = %i; calling `bind'", fd);
1876 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1877 {
1878 char errbuf[1024];
1879 ERROR ("bind: %s",
1880 sstrerror (errno, errbuf, sizeof (errbuf)));
1881 return (-1);
1882 }
1884 if (ai->ai_family == AF_INET)
1885 {
1886 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1887 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1888 {
1889 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1890 struct ip_mreqn mreq;
1891 #else
1892 struct ip_mreq mreq;
1893 #endif
1895 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1897 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1898 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1899 /* Set the interface using the interface index if
1900 * possible (available). Unfortunately, the struct
1901 * ip_mreqn is not portable. */
1902 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1903 mreq.imr_ifindex = interface_idx;
1904 #else
1905 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1906 #endif
1908 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1909 &loop, sizeof (loop)) == -1)
1910 {
1911 char errbuf[1024];
1912 ERROR ("network plugin: setsockopt (multicast-loop): %s",
1913 sstrerror (errno, errbuf,
1914 sizeof (errbuf)));
1915 return (-1);
1916 }
1918 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1919 &mreq, sizeof (mreq)) == -1)
1920 {
1921 char errbuf[1024];
1922 ERROR ("network plugin: setsockopt (add-membership): %s",
1923 sstrerror (errno, errbuf,
1924 sizeof (errbuf)));
1925 return (-1);
1926 }
1928 return (0);
1929 }
1930 }
1931 else if (ai->ai_family == AF_INET6)
1932 {
1933 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1934 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1935 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1936 {
1937 struct ipv6_mreq mreq;
1939 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1941 memcpy (&mreq.ipv6mr_multiaddr,
1942 &addr->sin6_addr,
1943 sizeof (addr->sin6_addr));
1945 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1946 * ipv6mr_interface may be set to zeroes to
1947 * choose the default multicast interface or to
1948 * the index of a particular multicast-capable
1949 * interface if the host is multihomed.
1950 * Membership is associ-associated with a
1951 * single interface; programs running on
1952 * multihomed hosts may need to join the same
1953 * group on more than one interface.*/
1954 mreq.ipv6mr_interface = interface_idx;
1956 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1957 &loop, sizeof (loop)) == -1)
1958 {
1959 char errbuf[1024];
1960 ERROR ("network plugin: setsockopt (ipv6-multicast-loop): %s",
1961 sstrerror (errno, errbuf,
1962 sizeof (errbuf)));
1963 return (-1);
1964 }
1966 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1967 &mreq, sizeof (mreq)) == -1)
1968 {
1969 char errbuf[1024];
1970 ERROR ("network plugin: setsockopt (ipv6-add-membership): %s",
1971 sstrerror (errno, errbuf,
1972 sizeof (errbuf)));
1973 return (-1);
1974 }
1976 return (0);
1977 }
1978 }
1980 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1981 /* if a specific interface was set, bind the socket to it. But to avoid
1982 * possible problems with multicast routing, only do that for non-multicast
1983 * addresses */
1984 if (interface_idx != 0)
1985 {
1986 char interface_name[IFNAMSIZ];
1988 if (if_indextoname (interface_idx, interface_name) == NULL)
1989 return (-1);
1991 DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
1993 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
1994 interface_name,
1995 sizeof(interface_name)) == -1 )
1996 {
1997 char errbuf[1024];
1998 ERROR ("network plugin: setsockopt (bind-if): %s",
1999 sstrerror (errno, errbuf, sizeof (errbuf)));
2000 return (-1);
2001 }
2002 }
2003 #endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
2005 return (0);
2006 } /* int network_bind_socket */
2008 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
2009 * or `SOCKENT_TYPE_SERVER' */
2010 static sockent_t *sockent_create (int type) /* {{{ */
2011 {
2012 sockent_t *se;
2014 if ((type != SOCKENT_TYPE_CLIENT) && (type != SOCKENT_TYPE_SERVER))
2015 return (NULL);
2017 se = malloc (sizeof (*se));
2018 if (se == NULL)
2019 return (NULL);
2020 memset (se, 0, sizeof (*se));
2022 se->type = type;
2023 se->node = NULL;
2024 se->service = NULL;
2025 se->interface = 0;
2026 se->next = NULL;
2028 if (type == SOCKENT_TYPE_SERVER)
2029 {
2030 se->data.server.fd = NULL;
2031 #if HAVE_LIBGCRYPT
2032 se->data.server.security_level = SECURITY_LEVEL_NONE;
2033 se->data.server.auth_file = NULL;
2034 se->data.server.userdb = NULL;
2035 se->data.server.cypher = NULL;
2036 #endif
2037 }
2038 else
2039 {
2040 se->data.client.fd = -1;
2041 se->data.client.addr = NULL;
2042 se->data.client.resolve_interval = 0;
2043 se->data.client.next_resolve_reconnect = 0;
2044 #if HAVE_LIBGCRYPT
2045 se->data.client.security_level = SECURITY_LEVEL_NONE;
2046 se->data.client.username = NULL;
2047 se->data.client.password = NULL;
2048 se->data.client.cypher = NULL;
2049 #endif
2050 }
2052 return (se);
2053 } /* }}} sockent_t *sockent_create */
2055 static int sockent_init_crypto (sockent_t *se) /* {{{ */
2056 {
2057 #if HAVE_LIBGCRYPT /* {{{ */
2058 if (se->type == SOCKENT_TYPE_CLIENT)
2059 {
2060 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
2061 {
2062 network_init_gcrypt ();
2064 if ((se->data.client.username == NULL)
2065 || (se->data.client.password == NULL))
2066 {
2067 ERROR ("network plugin: Client socket with "
2068 "security requested, but no "
2069 "credentials are configured.");
2070 return (-1);
2071 }
2072 gcry_md_hash_buffer (GCRY_MD_SHA256,
2073 se->data.client.password_hash,
2074 se->data.client.password,
2075 strlen (se->data.client.password));
2076 }
2077 }
2078 else /* (se->type == SOCKENT_TYPE_SERVER) */
2079 {
2080 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2081 {
2082 network_init_gcrypt ();
2084 if (se->data.server.auth_file == NULL)
2085 {
2086 ERROR ("network plugin: Server socket with "
2087 "security requested, but no "
2088 "password file is configured.");
2089 return (-1);
2090 }
2091 }
2092 if (se->data.server.auth_file != NULL)
2093 {
2094 se->data.server.userdb = fbh_create (se->data.server.auth_file);
2095 if (se->data.server.userdb == NULL)
2096 {
2097 ERROR ("network plugin: Reading password file "
2098 "`%s' failed.",
2099 se->data.server.auth_file);
2100 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2101 return (-1);
2102 }
2103 }
2104 }
2105 #endif /* }}} HAVE_LIBGCRYPT */
2107 return (0);
2108 } /* }}} int sockent_init_crypto */
2110 static int sockent_client_disconnect (sockent_t *se) /* {{{ */
2111 {
2112 struct sockent_client *client;
2114 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2115 return (EINVAL);
2117 client = &se->data.client;
2118 if (client->fd >= 0) /* connected */
2119 {
2120 close (client->fd);
2121 client->fd = -1;
2122 }
2124 sfree (client->addr);
2125 client->addrlen = 0;
2127 return (0);
2128 } /* }}} int sockent_client_disconnect */
2130 static int sockent_client_connect (sockent_t *se) /* {{{ */
2131 {
2132 static c_complain_t complaint = C_COMPLAIN_INIT_STATIC;
2134 struct sockent_client *client;
2135 struct addrinfo ai_hints;
2136 struct addrinfo *ai_list = NULL, *ai_ptr;
2137 int status;
2138 _Bool reconnect = 0;
2139 cdtime_t now;
2141 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2142 return (EINVAL);
2144 client = &se->data.client;
2146 now = cdtime ();
2147 if (client->resolve_interval != 0 && client->next_resolve_reconnect < now) {
2148 DEBUG("network plugin: Reconnecting socket, resolve_interval = %lf, next_resolve_reconnect = %lf",
2149 CDTIME_T_TO_DOUBLE(client->resolve_interval), CDTIME_T_TO_DOUBLE(client->next_resolve_reconnect));
2150 reconnect = 1;
2151 }
2153 if (client->fd >= 0 && !reconnect) /* already connected and not stale*/
2154 return (0);
2156 memset (&ai_hints, 0, sizeof (ai_hints));
2157 #ifdef AI_ADDRCONFIG
2158 ai_hints.ai_flags |= AI_ADDRCONFIG;
2159 #endif
2160 ai_hints.ai_family = AF_UNSPEC;
2161 ai_hints.ai_socktype = SOCK_DGRAM;
2162 ai_hints.ai_protocol = IPPROTO_UDP;
2164 status = getaddrinfo (se->node,
2165 (se->service != NULL) ? se->service : NET_DEFAULT_PORT,
2166 &ai_hints, &ai_list);
2167 if (status != 0)
2168 {
2169 c_complain (LOG_ERR, &complaint,
2170 "network plugin: getaddrinfo (%s, %s) failed: %s",
2171 (se->node == NULL) ? "(null)" : se->node,
2172 (se->service == NULL) ? "(null)" : se->service,
2173 gai_strerror (status));
2174 return (-1);
2175 }
2176 else
2177 {
2178 c_release (LOG_NOTICE, &complaint,
2179 "network plugin: Successfully resolved \"%s\".",
2180 se->node);
2181 }
2183 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2184 {
2185 if (client->fd >= 0) /* when we reconnect */
2186 sockent_client_disconnect(se);
2188 client->fd = socket (ai_ptr->ai_family,
2189 ai_ptr->ai_socktype,
2190 ai_ptr->ai_protocol);
2191 if (client->fd < 0)
2192 {
2193 char errbuf[1024];
2194 ERROR ("network plugin: socket(2) failed: %s",
2195 sstrerror (errno, errbuf,
2196 sizeof (errbuf)));
2197 continue;
2198 }
2200 client->addr = malloc (sizeof (*client->addr));
2201 if (client->addr == NULL)
2202 {
2203 ERROR ("network plugin: malloc failed.");
2204 close (client->fd);
2205 client->fd = -1;
2206 continue;
2207 }
2209 memset (client->addr, 0, sizeof (*client->addr));
2210 assert (sizeof (*client->addr) >= ai_ptr->ai_addrlen);
2211 memcpy (client->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2212 client->addrlen = ai_ptr->ai_addrlen;
2214 network_set_ttl (se, ai_ptr);
2215 network_set_interface (se, ai_ptr);
2217 /* We don't open more than one write-socket per
2218 * node/service pair.. */
2219 break;
2220 }
2222 freeaddrinfo (ai_list);
2223 if (client->fd < 0)
2224 return (-1);
2226 if (client->resolve_interval > 0)
2227 client->next_resolve_reconnect = now + client->resolve_interval;
2228 return (0);
2229 } /* }}} int sockent_client_connect */
2231 /* Open the file descriptors for a initialized sockent structure. */
2232 static int sockent_server_listen (sockent_t *se) /* {{{ */
2233 {
2234 struct addrinfo ai_hints;
2235 struct addrinfo *ai_list, *ai_ptr;
2236 int status;
2238 const char *node;
2239 const char *service;
2241 if (se == NULL)
2242 return (-1);
2244 node = se->node;
2245 service = se->service;
2247 if (service == NULL)
2248 service = NET_DEFAULT_PORT;
2250 DEBUG ("network plugin: sockent_server_listen: node = %s; service = %s;",
2251 node, service);
2253 memset (&ai_hints, 0, sizeof (ai_hints));
2254 ai_hints.ai_flags = 0;
2255 #ifdef AI_PASSIVE
2256 ai_hints.ai_flags |= AI_PASSIVE;
2257 #endif
2258 #ifdef AI_ADDRCONFIG
2259 ai_hints.ai_flags |= AI_ADDRCONFIG;
2260 #endif
2261 ai_hints.ai_family = AF_UNSPEC;
2262 ai_hints.ai_socktype = SOCK_DGRAM;
2263 ai_hints.ai_protocol = IPPROTO_UDP;
2265 status = getaddrinfo (node, service, &ai_hints, &ai_list);
2266 if (status != 0)
2267 {
2268 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
2269 (se->node == NULL) ? "(null)" : se->node,
2270 (se->service == NULL) ? "(null)" : se->service,
2271 gai_strerror (status));
2272 return (-1);
2273 }
2275 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2276 {
2277 int *tmp;
2279 tmp = realloc (se->data.server.fd,
2280 sizeof (*tmp) * (se->data.server.fd_num + 1));
2281 if (tmp == NULL)
2282 {
2283 ERROR ("network plugin: realloc failed.");
2284 continue;
2285 }
2286 se->data.server.fd = tmp;
2287 tmp = se->data.server.fd + se->data.server.fd_num;
2289 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
2290 ai_ptr->ai_protocol);
2291 if (*tmp < 0)
2292 {
2293 char errbuf[1024];
2294 ERROR ("network plugin: socket(2) failed: %s",
2295 sstrerror (errno, errbuf,
2296 sizeof (errbuf)));
2297 continue;
2298 }
2300 status = network_bind_socket (*tmp, ai_ptr, se->interface);
2301 if (status != 0)
2302 {
2303 close (*tmp);
2304 *tmp = -1;
2305 continue;
2306 }
2308 se->data.server.fd_num++;
2309 continue;
2310 } /* for (ai_list) */
2312 freeaddrinfo (ai_list);
2314 if (se->data.server.fd_num <= 0)
2315 return (-1);
2316 return (0);
2317 } /* }}} int sockent_server_listen */
2319 /* Add a sockent to the global list of sockets */
2320 static int sockent_add (sockent_t *se) /* {{{ */
2321 {
2322 sockent_t *last_ptr;
2324 if (se == NULL)
2325 return (-1);
2327 if (se->type == SOCKENT_TYPE_SERVER)
2328 {
2329 struct pollfd *tmp;
2330 size_t i;
2332 tmp = realloc (listen_sockets_pollfd,
2333 sizeof (*tmp) * (listen_sockets_num
2334 + se->data.server.fd_num));
2335 if (tmp == NULL)
2336 {
2337 ERROR ("network plugin: realloc failed.");
2338 return (-1);
2339 }
2340 listen_sockets_pollfd = tmp;
2341 tmp = listen_sockets_pollfd + listen_sockets_num;
2343 for (i = 0; i < se->data.server.fd_num; i++)
2344 {
2345 memset (tmp + i, 0, sizeof (*tmp));
2346 tmp[i].fd = se->data.server.fd[i];
2347 tmp[i].events = POLLIN | POLLPRI;
2348 tmp[i].revents = 0;
2349 }
2351 listen_sockets_num += se->data.server.fd_num;
2353 if (listen_sockets == NULL)
2354 {
2355 listen_sockets = se;
2356 return (0);
2357 }
2358 last_ptr = listen_sockets;
2359 }
2360 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2361 {
2362 if (sending_sockets == NULL)
2363 {
2364 sending_sockets = se;
2365 return (0);
2366 }
2367 last_ptr = sending_sockets;
2368 }
2370 while (last_ptr->next != NULL)
2371 last_ptr = last_ptr->next;
2372 last_ptr->next = se;
2374 return (0);
2375 } /* }}} int sockent_add */
2377 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
2378 {
2379 while (42)
2380 {
2381 receive_list_entry_t *ent;
2382 sockent_t *se;
2384 /* Lock and wait for more data to come in */
2385 pthread_mutex_lock (&receive_list_lock);
2386 while ((listen_loop == 0)
2387 && (receive_list_head == NULL))
2388 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
2390 /* Remove the head entry and unlock */
2391 ent = receive_list_head;
2392 if (ent != NULL)
2393 receive_list_head = ent->next;
2394 receive_list_length--;
2395 pthread_mutex_unlock (&receive_list_lock);
2397 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2398 * because we dispatch all missing packets before shutting down. */
2399 if (ent == NULL)
2400 break;
2402 /* Look for the correct `sockent_t' */
2403 se = listen_sockets;
2404 while (se != NULL)
2405 {
2406 size_t i;
2408 for (i = 0; i < se->data.server.fd_num; i++)
2409 if (se->data.server.fd[i] == ent->fd)
2410 break;
2412 if (i < se->data.server.fd_num)
2413 break;
2415 se = se->next;
2416 }
2418 if (se == NULL)
2419 {
2420 ERROR ("network plugin: Got packet from FD %i, but can't "
2421 "find an appropriate socket entry.",
2422 ent->fd);
2423 sfree (ent->data);
2424 sfree (ent);
2425 continue;
2426 }
2428 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0,
2429 /* username = */ NULL);
2430 sfree (ent->data);
2431 sfree (ent);
2432 } /* while (42) */
2434 return (NULL);
2435 } /* }}} void *dispatch_thread */
2437 static int network_receive (void) /* {{{ */
2438 {
2439 char buffer[network_config_packet_size];
2440 int buffer_len;
2442 int i;
2443 int status;
2445 receive_list_entry_t *private_list_head;
2446 receive_list_entry_t *private_list_tail;
2447 uint64_t private_list_length;
2449 assert (listen_sockets_num > 0);
2451 private_list_head = NULL;
2452 private_list_tail = NULL;
2453 private_list_length = 0;
2455 while (listen_loop == 0)
2456 {
2457 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2459 if (status <= 0)
2460 {
2461 char errbuf[1024];
2462 if (errno == EINTR)
2463 continue;
2464 ERROR ("poll failed: %s",
2465 sstrerror (errno, errbuf, sizeof (errbuf)));
2466 return (-1);
2467 }
2469 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2470 {
2471 receive_list_entry_t *ent;
2473 if ((listen_sockets_pollfd[i].revents
2474 & (POLLIN | POLLPRI)) == 0)
2475 continue;
2476 status--;
2478 buffer_len = recv (listen_sockets_pollfd[i].fd,
2479 buffer, sizeof (buffer),
2480 0 /* no flags */);
2481 if (buffer_len < 0)
2482 {
2483 char errbuf[1024];
2484 ERROR ("recv failed: %s",
2485 sstrerror (errno, errbuf,
2486 sizeof (errbuf)));
2487 return (-1);
2488 }
2490 stats_octets_rx += ((uint64_t) buffer_len);
2491 stats_packets_rx++;
2493 /* TODO: Possible performance enhancement: Do not free
2494 * these entries in the dispatch thread but put them in
2495 * another list, so we don't have to allocate more and
2496 * more of these structures. */
2497 ent = malloc (sizeof (receive_list_entry_t));
2498 if (ent == NULL)
2499 {
2500 ERROR ("network plugin: malloc failed.");
2501 return (-1);
2502 }
2503 memset (ent, 0, sizeof (receive_list_entry_t));
2504 ent->data = malloc (network_config_packet_size);
2505 if (ent->data == NULL)
2506 {
2507 sfree (ent);
2508 ERROR ("network plugin: malloc failed.");
2509 return (-1);
2510 }
2511 ent->fd = listen_sockets_pollfd[i].fd;
2512 ent->next = NULL;
2514 memcpy (ent->data, buffer, buffer_len);
2515 ent->data_len = buffer_len;
2517 if (private_list_head == NULL)
2518 private_list_head = ent;
2519 else
2520 private_list_tail->next = ent;
2521 private_list_tail = ent;
2522 private_list_length++;
2524 /* Do not block here. Blocking here has led to
2525 * insufficient performance in the past. */
2526 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2527 {
2528 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2529 || ((receive_list_head != NULL) && (receive_list_length != 0)));
2531 if (receive_list_head == NULL)
2532 receive_list_head = private_list_head;
2533 else
2534 receive_list_tail->next = private_list_head;
2535 receive_list_tail = private_list_tail;
2536 receive_list_length += private_list_length;
2538 pthread_cond_signal (&receive_list_cond);
2539 pthread_mutex_unlock (&receive_list_lock);
2541 private_list_head = NULL;
2542 private_list_tail = NULL;
2543 private_list_length = 0;
2544 }
2545 } /* for (listen_sockets_pollfd) */
2546 } /* while (listen_loop == 0) */
2548 /* Make sure everything is dispatched before exiting. */
2549 if (private_list_head != NULL)
2550 {
2551 pthread_mutex_lock (&receive_list_lock);
2553 if (receive_list_head == NULL)
2554 receive_list_head = private_list_head;
2555 else
2556 receive_list_tail->next = private_list_head;
2557 receive_list_tail = private_list_tail;
2558 receive_list_length += private_list_length;
2560 private_list_head = NULL;
2561 private_list_tail = NULL;
2562 private_list_length = 0;
2564 pthread_cond_signal (&receive_list_cond);
2565 pthread_mutex_unlock (&receive_list_lock);
2566 }
2568 return (0);
2569 } /* }}} int network_receive */
2571 static void *receive_thread (void __attribute__((unused)) *arg)
2572 {
2573 return (network_receive () ? (void *) 1 : (void *) 0);
2574 } /* void *receive_thread */
2576 static void network_init_buffer (void)
2577 {
2578 memset (send_buffer, 0, network_config_packet_size);
2579 send_buffer_ptr = send_buffer;
2580 send_buffer_fill = 0;
2581 send_buffer_last_update = 0;
2583 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2584 } /* int network_init_buffer */
2586 static void networt_send_buffer_plain (sockent_t *se, /* {{{ */
2587 const char *buffer, size_t buffer_size)
2588 {
2589 int status;
2591 while (42)
2592 {
2593 status = sockent_client_connect (se);
2594 if (status != 0)
2595 return;
2597 status = sendto (se->data.client.fd, buffer, buffer_size,
2598 /* flags = */ 0,
2599 (struct sockaddr *) se->data.client.addr,
2600 se->data.client.addrlen);
2601 if (status < 0)
2602 {
2603 char errbuf[1024];
2605 if ((errno == EINTR) || (errno == EAGAIN))
2606 continue;
2608 ERROR ("network plugin: sendto failed: %s. Closing sending socket.",
2609 sstrerror (errno, errbuf, sizeof (errbuf)));
2610 sockent_client_disconnect (se);
2611 return;
2612 }
2614 break;
2615 } /* while (42) */
2616 } /* }}} void networt_send_buffer_plain */
2618 #if HAVE_LIBGCRYPT
2619 #define BUFFER_ADD(p,s) do { \
2620 memcpy (buffer + buffer_offset, (p), (s)); \
2621 buffer_offset += (s); \
2622 } while (0)
2624 static void networt_send_buffer_signed (sockent_t *se, /* {{{ */
2625 const char *in_buffer, size_t in_buffer_size)
2626 {
2627 part_signature_sha256_t ps;
2628 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2629 size_t buffer_offset;
2630 size_t username_len;
2632 gcry_md_hd_t hd;
2633 gcry_error_t err;
2634 unsigned char *hash;
2636 hd = NULL;
2637 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2638 if (err != 0)
2639 {
2640 ERROR ("network plugin: Creating HMAC object failed: %s",
2641 gcry_strerror (err));
2642 return;
2643 }
2645 err = gcry_md_setkey (hd, se->data.client.password,
2646 strlen (se->data.client.password));
2647 if (err != 0)
2648 {
2649 ERROR ("network plugin: gcry_md_setkey failed: %s",
2650 gcry_strerror (err));
2651 gcry_md_close (hd);
2652 return;
2653 }
2655 username_len = strlen (se->data.client.username);
2656 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2657 {
2658 ERROR ("network plugin: Username too long: %s",
2659 se->data.client.username);
2660 return;
2661 }
2663 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2664 se->data.client.username, username_len);
2665 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2666 in_buffer, in_buffer_size);
2668 /* Initialize the `ps' structure. */
2669 memset (&ps, 0, sizeof (ps));
2670 ps.head.type = htons (TYPE_SIGN_SHA256);
2671 ps.head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len);
2673 /* Calculate the hash value. */
2674 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2675 username_len + in_buffer_size);
2676 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2677 if (hash == NULL)
2678 {
2679 ERROR ("network plugin: gcry_md_read failed.");
2680 gcry_md_close (hd);
2681 return;
2682 }
2683 memcpy (ps.hash, hash, sizeof (ps.hash));
2685 /* Add the header */
2686 buffer_offset = 0;
2688 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2689 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2690 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2692 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2694 gcry_md_close (hd);
2695 hd = NULL;
2697 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2698 networt_send_buffer_plain (se, buffer, buffer_offset);
2699 } /* }}} void networt_send_buffer_signed */
2701 static void networt_send_buffer_encrypted (sockent_t *se, /* {{{ */
2702 const char *in_buffer, size_t in_buffer_size)
2703 {
2704 part_encryption_aes256_t pea;
2705 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2706 size_t buffer_size;
2707 size_t buffer_offset;
2708 size_t header_size;
2709 size_t username_len;
2710 gcry_error_t err;
2711 gcry_cipher_hd_t cypher;
2713 /* Initialize the header fields */
2714 memset (&pea, 0, sizeof (pea));
2715 pea.head.type = htons (TYPE_ENCR_AES256);
2717 pea.username = se->data.client.username;
2719 username_len = strlen (pea.username);
2720 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2721 {
2722 ERROR ("network plugin: Username too long: %s", pea.username);
2723 return;
2724 }
2726 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2727 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2728 - sizeof (pea.hash);
2730 assert (buffer_size <= sizeof (buffer));
2731 DEBUG ("network plugin: networt_send_buffer_encrypted: "
2732 "buffer_size = %zu;", buffer_size);
2734 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2735 + username_len + in_buffer_size));
2736 pea.username_length = htons ((uint16_t) username_len);
2738 /* Chose a random initialization vector. */
2739 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2741 /* Create hash of the payload */
2742 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2744 /* Initialize the buffer */
2745 buffer_offset = 0;
2746 memset (buffer, 0, sizeof (buffer));
2749 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2750 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2751 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2752 BUFFER_ADD (pea.username, username_len);
2753 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2754 assert (buffer_offset == header_size);
2755 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2756 BUFFER_ADD (in_buffer, in_buffer_size);
2758 assert (buffer_offset == buffer_size);
2760 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2761 se->data.client.password);
2762 if (cypher == NULL)
2763 return;
2765 /* Encrypt the buffer in-place */
2766 err = gcry_cipher_encrypt (cypher,
2767 buffer + header_size,
2768 buffer_size - header_size,
2769 /* in = */ NULL, /* in len = */ 0);
2770 if (err != 0)
2771 {
2772 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2773 gcry_strerror (err));
2774 return;
2775 }
2777 /* Send it out without further modifications */
2778 networt_send_buffer_plain (se, buffer, buffer_size);
2779 } /* }}} void networt_send_buffer_encrypted */
2780 #undef BUFFER_ADD
2781 #endif /* HAVE_LIBGCRYPT */
2783 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2784 {
2785 sockent_t *se;
2787 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2789 for (se = sending_sockets; se != NULL; se = se->next)
2790 {
2791 #if HAVE_LIBGCRYPT
2792 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2793 networt_send_buffer_encrypted (se, buffer, buffer_len);
2794 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2795 networt_send_buffer_signed (se, buffer, buffer_len);
2796 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2797 #endif /* HAVE_LIBGCRYPT */
2798 networt_send_buffer_plain (se, buffer, buffer_len);
2799 } /* for (sending_sockets) */
2800 } /* }}} void network_send_buffer */
2802 static int add_to_buffer (char *buffer, int buffer_size, /* {{{ */
2803 value_list_t *vl_def,
2804 const data_set_t *ds, const value_list_t *vl)
2805 {
2806 char *buffer_orig = buffer;
2808 if (strcmp (vl_def->host, vl->host) != 0)
2809 {
2810 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2811 vl->host, strlen (vl->host)) != 0)
2812 return (-1);
2813 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2814 }
2816 if (vl_def->time != vl->time)
2817 {
2818 if (write_part_number (&buffer, &buffer_size, TYPE_TIME_HR,
2819 (uint64_t) vl->time))
2820 return (-1);
2821 vl_def->time = vl->time;
2822 }
2824 if (vl_def->interval != vl->interval)
2825 {
2826 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL_HR,
2827 (uint64_t) vl->interval))
2828 return (-1);
2829 vl_def->interval = vl->interval;
2830 }
2832 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2833 {
2834 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2835 vl->plugin, strlen (vl->plugin)) != 0)
2836 return (-1);
2837 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2838 }
2840 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2841 {
2842 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2843 vl->plugin_instance,
2844 strlen (vl->plugin_instance)) != 0)
2845 return (-1);
2846 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2847 }
2849 if (strcmp (vl_def->type, vl->type) != 0)
2850 {
2851 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2852 vl->type, strlen (vl->type)) != 0)
2853 return (-1);
2854 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2855 }
2857 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2858 {
2859 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2860 vl->type_instance,
2861 strlen (vl->type_instance)) != 0)
2862 return (-1);
2863 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2864 }
2866 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2867 return (-1);
2869 return (buffer - buffer_orig);
2870 } /* }}} int add_to_buffer */
2872 static void flush_buffer (void)
2873 {
2874 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2875 send_buffer_fill);
2877 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2879 stats_octets_tx += ((uint64_t) send_buffer_fill);
2880 stats_packets_tx++;
2882 network_init_buffer ();
2883 }
2885 static int network_write (const data_set_t *ds, const value_list_t *vl,
2886 user_data_t __attribute__((unused)) *user_data)
2887 {
2888 int status;
2890 if (!check_send_okay (vl))
2891 {
2892 #if COLLECT_DEBUG
2893 char name[6*DATA_MAX_NAME_LEN];
2894 FORMAT_VL (name, sizeof (name), vl);
2895 name[sizeof (name) - 1] = 0;
2896 DEBUG ("network plugin: network_write: "
2897 "NOT sending %s.", name);
2898 #endif
2899 /* Counter is not protected by another lock and may be reached by
2900 * multiple threads */
2901 pthread_mutex_lock (&stats_lock);
2902 stats_values_not_sent++;
2903 pthread_mutex_unlock (&stats_lock);
2904 return (0);
2905 }
2907 uc_meta_data_add_unsigned_int (vl,
2908 "network:time_sent", (uint64_t) vl->time);
2910 pthread_mutex_lock (&send_buffer_lock);
2912 status = add_to_buffer (send_buffer_ptr,
2913 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2914 &send_buffer_vl,
2915 ds, vl);
2916 if (status >= 0)
2917 {
2918 /* status == bytes added to the buffer */
2919 send_buffer_fill += status;
2920 send_buffer_ptr += status;
2921 send_buffer_last_update = cdtime();
2923 stats_values_sent++;
2924 }
2925 else
2926 {
2927 flush_buffer ();
2929 status = add_to_buffer (send_buffer_ptr,
2930 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2931 &send_buffer_vl,
2932 ds, vl);
2934 if (status >= 0)
2935 {
2936 send_buffer_fill += status;
2937 send_buffer_ptr += status;
2939 stats_values_sent++;
2940 }
2941 }
2943 if (status < 0)
2944 {
2945 ERROR ("network plugin: Unable to append to the "
2946 "buffer for some weird reason");
2947 }
2948 else if ((network_config_packet_size - send_buffer_fill) < 15)
2949 {
2950 flush_buffer ();
2951 }
2953 pthread_mutex_unlock (&send_buffer_lock);
2955 return ((status < 0) ? -1 : 0);
2956 } /* int network_write */
2958 static int network_config_set_boolean (const oconfig_item_t *ci, /* {{{ */
2959 int *retval)
2960 {
2961 if ((ci->values_num != 1)
2962 || ((ci->values[0].type != OCONFIG_TYPE_BOOLEAN)
2963 && (ci->values[0].type != OCONFIG_TYPE_STRING)))
2964 {
2965 ERROR ("network plugin: The `%s' config option needs "
2966 "exactly one boolean argument.", ci->key);
2967 return (-1);
2968 }
2970 if (ci->values[0].type == OCONFIG_TYPE_BOOLEAN)
2971 {
2972 if (ci->values[0].value.boolean)
2973 *retval = 1;
2974 else
2975 *retval = 0;
2976 }
2977 else
2978 {
2979 char *str = ci->values[0].value.string;
2981 if (IS_TRUE (str))
2982 *retval = 1;
2983 else if (IS_FALSE (str))
2984 *retval = 0;
2985 else
2986 {
2987 ERROR ("network plugin: Cannot parse string value `%s' of the `%s' "
2988 "option as boolean value.",
2989 str, ci->key);
2990 return (-1);
2991 }
2992 }
2994 return (0);
2995 } /* }}} int network_config_set_boolean */
2997 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
2998 {
2999 int tmp;
3000 if ((ci->values_num != 1)
3001 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
3002 {
3003 WARNING ("network plugin: The `TimeToLive' config option needs exactly "
3004 "one numeric argument.");
3005 return (-1);
3006 }
3008 tmp = (int) ci->values[0].value.number;
3009 if ((tmp > 0) && (tmp <= 255))
3010 network_config_ttl = tmp;
3011 else {
3012 WARNING ("network plugin: The `TimeToLive' must be between 1 and 255.");
3013 return (-1);
3014 }
3016 return (0);
3017 } /* }}} int network_config_set_ttl */
3019 static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
3020 int *interface)
3021 {
3022 if ((ci->values_num != 1)
3023 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3024 {
3025 WARNING ("network plugin: The `Interface' config option needs exactly "
3026 "one string argument.");
3027 return (-1);
3028 }
3030 if (interface == NULL)
3031 return (-1);
3033 *interface = if_nametoindex (ci->values[0].value.string);
3035 return (0);
3036 } /* }}} int network_config_set_interface */
3038 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
3039 {
3040 int tmp;
3041 if ((ci->values_num != 1)
3042 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
3043 {
3044 WARNING ("network plugin: The `MaxPacketSize' config option needs exactly "
3045 "one numeric argument.");
3046 return (-1);
3047 }
3049 tmp = (int) ci->values[0].value.number;
3050 if ((tmp >= 1024) && (tmp <= 65535))
3051 network_config_packet_size = tmp;
3053 return (0);
3054 } /* }}} int network_config_set_buffer_size */
3056 #if HAVE_LIBGCRYPT
3057 static int network_config_set_string (const oconfig_item_t *ci, /* {{{ */
3058 char **ret_string)
3059 {
3060 char *tmp;
3061 if ((ci->values_num != 1)
3062 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3063 {
3064 WARNING ("network plugin: The `%s' config option needs exactly "
3065 "one string argument.", ci->key);
3066 return (-1);
3067 }
3069 tmp = strdup (ci->values[0].value.string);
3070 if (tmp == NULL)
3071 return (-1);
3073 sfree (*ret_string);
3074 *ret_string = tmp;
3076 return (0);
3077 } /* }}} int network_config_set_string */
3078 #endif /* HAVE_LIBGCRYPT */
3080 #if HAVE_LIBGCRYPT
3081 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
3082 int *retval)
3083 {
3084 char *str;
3085 if ((ci->values_num != 1)
3086 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3087 {
3088 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
3089 "one string argument.");
3090 return (-1);
3091 }
3093 str = ci->values[0].value.string;
3094 if (strcasecmp ("Encrypt", str) == 0)
3095 *retval = SECURITY_LEVEL_ENCRYPT;
3096 else if (strcasecmp ("Sign", str) == 0)
3097 *retval = SECURITY_LEVEL_SIGN;
3098 else if (strcasecmp ("None", str) == 0)
3099 *retval = SECURITY_LEVEL_NONE;
3100 else
3101 {
3102 WARNING ("network plugin: Unknown security level: %s.", str);
3103 return (-1);
3104 }
3106 return (0);
3107 } /* }}} int network_config_set_security_level */
3108 #endif /* HAVE_LIBGCRYPT */
3110 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
3111 {
3112 sockent_t *se;
3113 int status;
3114 int i;
3116 if ((ci->values_num < 1) || (ci->values_num > 2)
3117 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3118 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3119 {
3120 ERROR ("network plugin: The `%s' config option needs "
3121 "one or two string arguments.", ci->key);
3122 return (-1);
3123 }
3125 se = sockent_create (SOCKENT_TYPE_SERVER);
3126 if (se == NULL)
3127 {
3128 ERROR ("network plugin: sockent_create failed.");
3129 return (-1);
3130 }
3132 se->node = strdup (ci->values[0].value.string);
3133 if (ci->values_num >= 2)
3134 se->service = strdup (ci->values[1].value.string);
3136 for (i = 0; i < ci->children_num; i++)
3137 {
3138 oconfig_item_t *child = ci->children + i;
3140 #if HAVE_LIBGCRYPT
3141 if (strcasecmp ("AuthFile", child->key) == 0)
3142 network_config_set_string (child, &se->data.server.auth_file);
3143 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3144 network_config_set_security_level (child,
3145 &se->data.server.security_level);
3146 else
3147 #endif /* HAVE_LIBGCRYPT */
3148 if (strcasecmp ("Interface", child->key) == 0)
3149 network_config_set_interface (child,
3150 &se->interface);
3151 else
3152 {
3153 WARNING ("network plugin: Option `%s' is not allowed here.",
3154 child->key);
3155 }
3156 }
3158 #if HAVE_LIBGCRYPT
3159 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
3160 && (se->data.server.auth_file == NULL))
3161 {
3162 ERROR ("network plugin: A security level higher than `none' was "
3163 "requested, but no AuthFile option was given. Cowardly refusing to "
3164 "open this socket!");
3165 sockent_destroy (se);
3166 return (-1);
3167 }
3168 #endif /* HAVE_LIBGCRYPT */
3170 status = sockent_init_crypto (se);
3171 if (status != 0)
3172 {
3173 ERROR ("network plugin: network_config_add_listen: sockent_init_crypto() failed.");
3174 sockent_destroy (se);
3175 return (-1);
3176 }
3178 status = sockent_server_listen (se);
3179 if (status != 0)
3180 {
3181 ERROR ("network plugin: network_config_add_server: sockent_server_listen failed.");
3182 sockent_destroy (se);
3183 return (-1);
3184 }
3186 status = sockent_add (se);
3187 if (status != 0)
3188 {
3189 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
3190 sockent_destroy (se);
3191 return (-1);
3192 }
3194 return (0);
3195 } /* }}} int network_config_add_listen */
3197 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
3198 {
3199 sockent_t *se;
3200 int status;
3201 int i;
3203 if ((ci->values_num < 1) || (ci->values_num > 2)
3204 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3205 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3206 {
3207 ERROR ("network plugin: The `%s' config option needs "
3208 "one or two string arguments.", ci->key);
3209 return (-1);
3210 }
3212 se = sockent_create (SOCKENT_TYPE_CLIENT);
3213 if (se == NULL)
3214 {
3215 ERROR ("network plugin: sockent_create failed.");
3216 return (-1);
3217 }
3219 se->node = strdup (ci->values[0].value.string);
3220 if (ci->values_num >= 2)
3221 se->service = strdup (ci->values[1].value.string);
3223 for (i = 0; i < ci->children_num; i++)
3224 {
3225 oconfig_item_t *child = ci->children + i;
3227 #if HAVE_LIBGCRYPT
3228 if (strcasecmp ("Username", child->key) == 0)
3229 network_config_set_string (child, &se->data.client.username);
3230 else if (strcasecmp ("Password", child->key) == 0)
3231 network_config_set_string (child, &se->data.client.password);
3232 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3233 network_config_set_security_level (child,
3234 &se->data.client.security_level);
3235 else
3236 #endif /* HAVE_LIBGCRYPT */
3237 if (strcasecmp ("Interface", child->key) == 0)
3238 network_config_set_interface (child,
3239 &se->interface);
3240 else if (strcasecmp ("ResolveInterval", child->key) == 0)
3241 cf_util_get_cdtime(child, &se->data.client.resolve_interval);
3242 else
3243 {
3244 WARNING ("network plugin: Option `%s' is not allowed here.",
3245 child->key);
3246 }
3247 }
3249 #if HAVE_LIBGCRYPT
3250 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
3251 && ((se->data.client.username == NULL)
3252 || (se->data.client.password == NULL)))
3253 {
3254 ERROR ("network plugin: A security level higher than `none' was "
3255 "requested, but no Username or Password option was given. "
3256 "Cowardly refusing to open this socket!");
3257 sockent_destroy (se);
3258 return (-1);
3259 }
3260 #endif /* HAVE_LIBGCRYPT */
3262 status = sockent_init_crypto (se);
3263 if (status != 0)
3264 {
3265 ERROR ("network plugin: network_config_add_server: sockent_init_crypto() failed.");
3266 sockent_destroy (se);
3267 return (-1);
3268 }
3270 /* No call to sockent_client_connect() here -- it is called from
3271 * networt_send_buffer_plain(). */
3273 status = sockent_add (se);
3274 if (status != 0)
3275 {
3276 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
3277 sockent_destroy (se);
3278 return (-1);
3279 }
3281 return (0);
3282 } /* }}} int network_config_add_server */
3284 static int network_config (oconfig_item_t *ci) /* {{{ */
3285 {
3286 int i;
3288 /* The options need to be applied first */
3289 for (i = 0; i < ci->children_num; i++)
3290 {
3291 oconfig_item_t *child = ci->children + i;
3292 if (strcasecmp ("TimeToLive", child->key) == 0)
3293 network_config_set_ttl (child);
3294 }
3296 for (i = 0; i < ci->children_num; i++)
3297 {
3298 oconfig_item_t *child = ci->children + i;
3300 if (strcasecmp ("Listen", child->key) == 0)
3301 network_config_add_listen (child);
3302 else if (strcasecmp ("Server", child->key) == 0)
3303 network_config_add_server (child);
3304 else if (strcasecmp ("TimeToLive", child->key) == 0) {
3305 /* Handled earlier */
3306 }
3307 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
3308 network_config_set_buffer_size (child);
3309 else if (strcasecmp ("Forward", child->key) == 0)
3310 network_config_set_boolean (child, &network_config_forward);
3311 else if (strcasecmp ("ReportStats", child->key) == 0)
3312 network_config_set_boolean (child, &network_config_stats);
3313 else
3314 {
3315 WARNING ("network plugin: Option `%s' is not allowed here.",
3316 child->key);
3317 }
3318 }
3320 return (0);
3321 } /* }}} int network_config */
3323 static int network_notification (const notification_t *n,
3324 user_data_t __attribute__((unused)) *user_data)
3325 {
3326 char buffer[network_config_packet_size];
3327 char *buffer_ptr = buffer;
3328 int buffer_free = sizeof (buffer);
3329 int status;
3331 if (!check_send_notify_okay (n))
3332 return (0);
3334 memset (buffer, 0, sizeof (buffer));
3336 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME_HR,
3337 (uint64_t) n->time);
3338 if (status != 0)
3339 return (-1);
3341 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
3342 (uint64_t) n->severity);
3343 if (status != 0)
3344 return (-1);
3346 if (strlen (n->host) > 0)
3347 {
3348 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
3349 n->host, strlen (n->host));
3350 if (status != 0)
3351 return (-1);
3352 }
3354 if (strlen (n->plugin) > 0)
3355 {
3356 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
3357 n->plugin, strlen (n->plugin));
3358 if (status != 0)
3359 return (-1);
3360 }
3362 if (strlen (n->plugin_instance) > 0)
3363 {
3364 status = write_part_string (&buffer_ptr, &buffer_free,
3365 TYPE_PLUGIN_INSTANCE,
3366 n->plugin_instance, strlen (n->plugin_instance));
3367 if (status != 0)
3368 return (-1);
3369 }
3371 if (strlen (n->type) > 0)
3372 {
3373 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3374 n->type, strlen (n->type));
3375 if (status != 0)
3376 return (-1);
3377 }
3379 if (strlen (n->type_instance) > 0)
3380 {
3381 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3382 n->type_instance, strlen (n->type_instance));
3383 if (status != 0)
3384 return (-1);
3385 }
3387 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3388 n->message, strlen (n->message));
3389 if (status != 0)
3390 return (-1);
3392 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3394 return (0);
3395 } /* int network_notification */
3397 static int network_shutdown (void)
3398 {
3399 sockent_t *se;
3401 listen_loop++;
3403 /* Kill the listening thread */
3404 if (receive_thread_running != 0)
3405 {
3406 INFO ("network plugin: Stopping receive thread.");
3407 pthread_kill (receive_thread_id, SIGTERM);
3408 pthread_join (receive_thread_id, NULL /* no return value */);
3409 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3410 receive_thread_running = 0;
3411 }
3413 /* Shutdown the dispatching thread */
3414 if (dispatch_thread_running != 0)
3415 {
3416 INFO ("network plugin: Stopping dispatch thread.");
3417 pthread_mutex_lock (&receive_list_lock);
3418 pthread_cond_broadcast (&receive_list_cond);
3419 pthread_mutex_unlock (&receive_list_lock);
3420 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3421 dispatch_thread_running = 0;
3422 }
3424 sockent_destroy (listen_sockets);
3426 if (send_buffer_fill > 0)
3427 flush_buffer ();
3429 sfree (send_buffer);
3431 for (se = sending_sockets; se != NULL; se = se->next)
3432 sockent_client_disconnect (se);
3433 sockent_destroy (sending_sockets);
3435 plugin_unregister_config ("network");
3436 plugin_unregister_init ("network");
3437 plugin_unregister_write ("network");
3438 plugin_unregister_shutdown ("network");
3440 return (0);
3441 } /* int network_shutdown */
3443 static int network_stats_read (void) /* {{{ */
3444 {
3445 derive_t copy_octets_rx;
3446 derive_t copy_octets_tx;
3447 derive_t copy_packets_rx;
3448 derive_t copy_packets_tx;
3449 derive_t copy_values_dispatched;
3450 derive_t copy_values_not_dispatched;
3451 derive_t copy_values_sent;
3452 derive_t copy_values_not_sent;
3453 derive_t copy_receive_list_length;
3454 value_list_t vl = VALUE_LIST_INIT;
3455 value_t values[2];
3457 copy_octets_rx = stats_octets_rx;
3458 copy_octets_tx = stats_octets_tx;
3459 copy_packets_rx = stats_packets_rx;
3460 copy_packets_tx = stats_packets_tx;
3461 copy_values_dispatched = stats_values_dispatched;
3462 copy_values_not_dispatched = stats_values_not_dispatched;
3463 copy_values_sent = stats_values_sent;
3464 copy_values_not_sent = stats_values_not_sent;
3465 copy_receive_list_length = receive_list_length;
3467 /* Initialize `vl' */
3468 vl.values = values;
3469 vl.values_len = 2;
3470 vl.time = 0;
3471 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3472 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3474 /* Octets received / sent */
3475 vl.values[0].derive = (derive_t) copy_octets_rx;
3476 vl.values[1].derive = (derive_t) copy_octets_tx;
3477 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3478 plugin_dispatch_values (&vl);
3480 /* Packets received / send */
3481 vl.values[0].derive = (derive_t) copy_packets_rx;
3482 vl.values[1].derive = (derive_t) copy_packets_tx;
3483 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3484 plugin_dispatch_values (&vl);
3486 /* Values (not) dispatched and (not) send */
3487 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3488 vl.values_len = 1;
3490 vl.values[0].derive = (derive_t) copy_values_dispatched;
3491 sstrncpy (vl.type_instance, "dispatch-accepted",
3492 sizeof (vl.type_instance));
3493 plugin_dispatch_values (&vl);
3495 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3496 sstrncpy (vl.type_instance, "dispatch-rejected",
3497 sizeof (vl.type_instance));
3498 plugin_dispatch_values (&vl);
3500 vl.values[0].derive = (derive_t) copy_values_sent;
3501 sstrncpy (vl.type_instance, "send-accepted",
3502 sizeof (vl.type_instance));
3503 plugin_dispatch_values (&vl);
3505 vl.values[0].derive = (derive_t) copy_values_not_sent;
3506 sstrncpy (vl.type_instance, "send-rejected",
3507 sizeof (vl.type_instance));
3508 plugin_dispatch_values (&vl);
3510 /* Receive queue length */
3511 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3512 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3513 vl.type_instance[0] = 0;
3514 plugin_dispatch_values (&vl);
3516 return (0);
3517 } /* }}} int network_stats_read */
3519 static int network_init (void)
3520 {
3521 static _Bool have_init = 0;
3523 /* Check if we were already initialized. If so, just return - there's
3524 * nothing more to do (for now, that is). */
3525 if (have_init)
3526 return (0);
3527 have_init = 1;
3529 #if HAVE_LIBGCRYPT
3530 network_init_gcrypt ();
3531 #endif
3533 if (network_config_stats != 0)
3534 plugin_register_read ("network", network_stats_read);
3536 plugin_register_shutdown ("network", network_shutdown);
3538 send_buffer = malloc (network_config_packet_size);
3539 if (send_buffer == NULL)
3540 {
3541 ERROR ("network plugin: malloc failed.");
3542 return (-1);
3543 }
3544 network_init_buffer ();
3546 /* setup socket(s) and so on */
3547 if (sending_sockets != NULL)
3548 {
3549 plugin_register_write ("network", network_write,
3550 /* user_data = */ NULL);
3551 plugin_register_notification ("network", network_notification,
3552 /* user_data = */ NULL);
3553 }
3555 /* If no threads need to be started, return here. */
3556 if ((listen_sockets_num == 0)
3557 || ((dispatch_thread_running != 0)
3558 && (receive_thread_running != 0)))
3559 return (0);
3561 if (dispatch_thread_running == 0)
3562 {
3563 int status;
3564 status = plugin_thread_create (&dispatch_thread_id,
3565 NULL /* no attributes */,
3566 dispatch_thread,
3567 NULL /* no argument */);
3568 if (status != 0)
3569 {
3570 char errbuf[1024];
3571 ERROR ("network: pthread_create failed: %s",
3572 sstrerror (errno, errbuf,
3573 sizeof (errbuf)));
3574 }
3575 else
3576 {
3577 dispatch_thread_running = 1;
3578 }
3579 }
3581 if (receive_thread_running == 0)
3582 {
3583 int status;
3584 status = plugin_thread_create (&receive_thread_id,
3585 NULL /* no attributes */,
3586 receive_thread,
3587 NULL /* no argument */);
3588 if (status != 0)
3589 {
3590 char errbuf[1024];
3591 ERROR ("network: pthread_create failed: %s",
3592 sstrerror (errno, errbuf,
3593 sizeof (errbuf)));
3594 }
3595 else
3596 {
3597 receive_thread_running = 1;
3598 }
3599 }
3601 return (0);
3602 } /* int network_init */
3604 /*
3605 * The flush option of the network plugin cannot flush individual identifiers.
3606 * All the values are added to a buffer and sent when the buffer is full, the
3607 * requested value may or may not be in there, it's not worth finding out. We
3608 * just send the buffer if `flush' is called - if the requested value was in
3609 * there, good. If not, well, then there is nothing to flush.. -octo
3610 */
3611 static int network_flush (cdtime_t timeout,
3612 __attribute__((unused)) const char *identifier,
3613 __attribute__((unused)) user_data_t *user_data)
3614 {
3615 pthread_mutex_lock (&send_buffer_lock);
3617 if (send_buffer_fill > 0)
3618 {
3619 if (timeout > 0)
3620 {
3621 cdtime_t now = cdtime ();
3622 if ((send_buffer_last_update + timeout) > now)
3623 {
3624 pthread_mutex_unlock (&send_buffer_lock);
3625 return (0);
3626 }
3627 }
3628 flush_buffer ();
3629 }
3630 pthread_mutex_unlock (&send_buffer_lock);
3632 return (0);
3633 } /* int network_flush */
3635 void module_register (void)
3636 {
3637 plugin_register_complex_config ("network", network_config);
3638 plugin_register_init ("network", network_init);
3639 plugin_register_flush ("network", network_flush,
3640 /* user_data = */ NULL);
3641 } /* void module_register */
3643 /* vim: set fdm=marker : */