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 value_list_t send_buffer_vl = VALUE_LIST_STATIC;
314 static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
316 /* XXX: These counters are incremented from one place only. The spot in which
317 * the values are incremented is either only reachable by one thread (the
318 * dispatch thread, for example) or locked by some lock (send_buffer_lock for
319 * example). Only if neither is true, the stats_lock is acquired. The counters
320 * are always read without holding a lock in the hope that writing 8 bytes to
321 * memory is an atomic operation. */
322 static derive_t stats_octets_rx = 0;
323 static derive_t stats_octets_tx = 0;
324 static derive_t stats_packets_rx = 0;
325 static derive_t stats_packets_tx = 0;
326 static derive_t stats_values_dispatched = 0;
327 static derive_t stats_values_not_dispatched = 0;
328 static derive_t stats_values_sent = 0;
329 static derive_t stats_values_not_sent = 0;
330 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
332 /*
333 * Private functions
334 */
335 static _Bool check_receive_okay (const value_list_t *vl) /* {{{ */
336 {
337 uint64_t time_sent = 0;
338 int status;
340 status = uc_meta_data_get_unsigned_int (vl,
341 "network:time_sent", &time_sent);
343 /* This is a value we already sent. Don't allow it to be received again in
344 * order to avoid looping. */
345 if ((status == 0) && (time_sent >= ((uint64_t) vl->time)))
346 return (0);
348 return (1);
349 } /* }}} _Bool check_receive_okay */
351 static _Bool check_send_okay (const value_list_t *vl) /* {{{ */
352 {
353 _Bool received = 0;
354 int status;
356 if (network_config_forward != 0)
357 return (1);
359 if (vl->meta == NULL)
360 return (1);
362 status = meta_data_get_boolean (vl->meta, "network:received", &received);
363 if (status == -ENOENT)
364 return (1);
365 else if (status != 0)
366 {
367 ERROR ("network plugin: check_send_okay: meta_data_get_boolean failed "
368 "with status %i.", status);
369 return (1);
370 }
372 /* By default, only *send* value lists that were not *received* by the
373 * network plugin. */
374 return (!received);
375 } /* }}} _Bool check_send_okay */
377 static _Bool check_notify_received (const notification_t *n) /* {{{ */
378 {
379 notification_meta_t *ptr;
381 for (ptr = n->meta; ptr != NULL; ptr = ptr->next)
382 if ((strcmp ("network:received", ptr->name) == 0)
383 && (ptr->type == NM_TYPE_BOOLEAN))
384 return ((_Bool) ptr->nm_value.nm_boolean);
386 return (0);
387 } /* }}} _Bool check_notify_received */
389 static _Bool check_send_notify_okay (const notification_t *n) /* {{{ */
390 {
391 static c_complain_t complain_forwarding = C_COMPLAIN_INIT_STATIC;
392 _Bool received = 0;
394 if (n->meta == NULL)
395 return (1);
397 received = check_notify_received (n);
399 if (network_config_forward && received)
400 {
401 c_complain_once (LOG_ERR, &complain_forwarding,
402 "network plugin: A notification has been received via the network "
403 "and forwarding is enabled. Forwarding of notifications is currently "
404 "not supported, because there is not loop-deteciton available. "
405 "Please contact the collectd mailing list if you need this "
406 "feature.");
407 }
409 /* By default, only *send* value lists that were not *received* by the
410 * network plugin. */
411 return (!received);
412 } /* }}} _Bool check_send_notify_okay */
414 static int network_dispatch_values (value_list_t *vl, /* {{{ */
415 const char *username)
416 {
417 int status;
419 if ((vl->time <= 0)
420 || (strlen (vl->host) <= 0)
421 || (strlen (vl->plugin) <= 0)
422 || (strlen (vl->type) <= 0))
423 return (-EINVAL);
425 if (!check_receive_okay (vl))
426 {
427 #if COLLECT_DEBUG
428 char name[6*DATA_MAX_NAME_LEN];
429 FORMAT_VL (name, sizeof (name), vl);
430 name[sizeof (name) - 1] = 0;
431 DEBUG ("network plugin: network_dispatch_values: "
432 "NOT dispatching %s.", name);
433 #endif
434 stats_values_not_dispatched++;
435 return (0);
436 }
438 assert (vl->meta == NULL);
440 vl->meta = meta_data_create ();
441 if (vl->meta == NULL)
442 {
443 ERROR ("network plugin: meta_data_create failed.");
444 return (-ENOMEM);
445 }
447 status = meta_data_add_boolean (vl->meta, "network:received", 1);
448 if (status != 0)
449 {
450 ERROR ("network plugin: meta_data_add_boolean failed.");
451 meta_data_destroy (vl->meta);
452 vl->meta = NULL;
453 return (status);
454 }
456 if (username != NULL)
457 {
458 status = meta_data_add_string (vl->meta, "network:username", username);
459 if (status != 0)
460 {
461 ERROR ("network plugin: meta_data_add_string failed.");
462 meta_data_destroy (vl->meta);
463 vl->meta = NULL;
464 return (status);
465 }
466 }
468 plugin_dispatch_values (vl);
469 stats_values_dispatched++;
471 meta_data_destroy (vl->meta);
472 vl->meta = NULL;
474 return (0);
475 } /* }}} int network_dispatch_values */
477 static int network_dispatch_notification (notification_t *n) /* {{{ */
478 {
479 int status;
481 assert (n->meta == NULL);
483 status = plugin_notification_meta_add_boolean (n, "network:received", 1);
484 if (status != 0)
485 {
486 ERROR ("network plugin: plugin_notification_meta_add_boolean failed.");
487 plugin_notification_meta_free (n->meta);
488 n->meta = NULL;
489 return (status);
490 }
492 status = plugin_dispatch_notification (n);
494 plugin_notification_meta_free (n->meta);
495 n->meta = NULL;
497 return (status);
498 } /* }}} int network_dispatch_notification */
500 #if HAVE_LIBGCRYPT
501 static void network_init_gcrypt (void) /* {{{ */
502 {
503 gcry_error_t err;
505 /* http://lists.gnupg.org/pipermail/gcrypt-devel/2003-August/000458.html
506 * Because you can't know in a library whether another library has
507 * already initialized the library */
508 if (gcry_control (GCRYCTL_ANY_INITIALIZATION_P))
509 return;
511 /* http://www.gnupg.org/documentation/manuals/gcrypt/Multi_002dThreading.html
512 * To ensure thread-safety, it's important to set GCRYCTL_SET_THREAD_CBS
513 * *before* initalizing Libgcrypt with gcry_check_version(), which itself must
514 * be called before any other gcry_* function. GCRYCTL_ANY_INITIALIZATION_P
515 * above doesn't count, as it doesn't implicitly initalize Libgcrypt.
516 *
517 * tl;dr: keep all these gry_* statements in this exact order please. */
518 # if GCRYPT_VERSION_NUMBER < 0x010600
519 err = gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
520 if (err)
521 {
522 ERROR ("network plugin: gcry_control (GCRYCTL_SET_THREAD_CBS) failed: %s", gcry_strerror (err));
523 abort ();
524 }
525 # endif
527 gcry_check_version (NULL);
529 err = gcry_control (GCRYCTL_INIT_SECMEM, 32768);
530 if (err)
531 {
532 ERROR ("network plugin: gcry_control (GCRYCTL_SET_THREAD_CBS) failed: %s", gcry_strerror (err));
533 abort ();
534 }
536 gcry_control (GCRYCTL_INITIALIZATION_FINISHED);
537 } /* }}} void network_init_gcrypt */
539 static gcry_cipher_hd_t network_get_aes256_cypher (sockent_t *se, /* {{{ */
540 const void *iv, size_t iv_size, const char *username)
541 {
542 gcry_error_t err;
543 gcry_cipher_hd_t *cyper_ptr;
544 unsigned char password_hash[32];
546 if (se->type == SOCKENT_TYPE_CLIENT)
547 {
548 cyper_ptr = &se->data.client.cypher;
549 memcpy (password_hash, se->data.client.password_hash,
550 sizeof (password_hash));
551 }
552 else
553 {
554 char *secret;
556 cyper_ptr = &se->data.server.cypher;
558 if (username == NULL)
559 return (NULL);
561 secret = fbh_get (se->data.server.userdb, username);
562 if (secret == NULL)
563 return (NULL);
565 gcry_md_hash_buffer (GCRY_MD_SHA256,
566 password_hash,
567 secret, strlen (secret));
569 sfree (secret);
570 }
572 if (*cyper_ptr == NULL)
573 {
574 err = gcry_cipher_open (cyper_ptr,
575 GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB, /* flags = */ 0);
576 if (err != 0)
577 {
578 ERROR ("network plugin: gcry_cipher_open returned: %s",
579 gcry_strerror (err));
580 *cyper_ptr = NULL;
581 return (NULL);
582 }
583 }
584 else
585 {
586 gcry_cipher_reset (*cyper_ptr);
587 }
588 assert (*cyper_ptr != NULL);
590 err = gcry_cipher_setkey (*cyper_ptr,
591 password_hash, sizeof (password_hash));
592 if (err != 0)
593 {
594 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
595 gcry_strerror (err));
596 gcry_cipher_close (*cyper_ptr);
597 *cyper_ptr = NULL;
598 return (NULL);
599 }
601 err = gcry_cipher_setiv (*cyper_ptr, iv, iv_size);
602 if (err != 0)
603 {
604 ERROR ("network plugin: gcry_cipher_setkey returned: %s",
605 gcry_strerror (err));
606 gcry_cipher_close (*cyper_ptr);
607 *cyper_ptr = NULL;
608 return (NULL);
609 }
611 return (*cyper_ptr);
612 } /* }}} int network_get_aes256_cypher */
613 #endif /* HAVE_LIBGCRYPT */
615 static int write_part_values (char **ret_buffer, int *ret_buffer_len,
616 const data_set_t *ds, const value_list_t *vl)
617 {
618 char *packet_ptr;
619 int packet_len;
620 int num_values;
622 part_header_t pkg_ph;
623 uint16_t pkg_num_values;
624 uint8_t *pkg_values_types;
625 value_t *pkg_values;
627 int offset;
628 int i;
630 num_values = vl->values_len;
631 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
632 + (num_values * sizeof (uint8_t))
633 + (num_values * sizeof (value_t));
635 if (*ret_buffer_len < packet_len)
636 return (-1);
638 pkg_values_types = (uint8_t *) malloc (num_values * sizeof (uint8_t));
639 if (pkg_values_types == NULL)
640 {
641 ERROR ("network plugin: write_part_values: malloc failed.");
642 return (-1);
643 }
645 pkg_values = (value_t *) malloc (num_values * sizeof (value_t));
646 if (pkg_values == NULL)
647 {
648 free (pkg_values_types);
649 ERROR ("network plugin: write_part_values: malloc failed.");
650 return (-1);
651 }
653 pkg_ph.type = htons (TYPE_VALUES);
654 pkg_ph.length = htons (packet_len);
656 pkg_num_values = htons ((uint16_t) vl->values_len);
658 for (i = 0; i < num_values; i++)
659 {
660 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
661 switch (ds->ds[i].type)
662 {
663 case DS_TYPE_COUNTER:
664 pkg_values[i].counter = htonll (vl->values[i].counter);
665 break;
667 case DS_TYPE_GAUGE:
668 pkg_values[i].gauge = htond (vl->values[i].gauge);
669 break;
671 case DS_TYPE_DERIVE:
672 pkg_values[i].derive = htonll (vl->values[i].derive);
673 break;
675 case DS_TYPE_ABSOLUTE:
676 pkg_values[i].absolute = htonll (vl->values[i].absolute);
677 break;
679 default:
680 free (pkg_values_types);
681 free (pkg_values);
682 ERROR ("network plugin: write_part_values: "
683 "Unknown data source type: %i",
684 ds->ds[i].type);
685 return (-1);
686 } /* switch (ds->ds[i].type) */
687 } /* for (num_values) */
689 /*
690 * Use `memcpy' to write everything to the buffer, because the pointer
691 * may be unaligned and some architectures, such as SPARC, can't handle
692 * that.
693 */
694 packet_ptr = *ret_buffer;
695 offset = 0;
696 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
697 offset += sizeof (pkg_ph);
698 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
699 offset += sizeof (pkg_num_values);
700 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
701 offset += num_values * sizeof (uint8_t);
702 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
703 offset += num_values * sizeof (value_t);
705 assert (offset == packet_len);
707 *ret_buffer = packet_ptr + packet_len;
708 *ret_buffer_len -= packet_len;
710 free (pkg_values_types);
711 free (pkg_values);
713 return (0);
714 } /* int write_part_values */
716 static int write_part_number (char **ret_buffer, int *ret_buffer_len,
717 int type, uint64_t value)
718 {
719 char *packet_ptr;
720 int packet_len;
722 part_header_t pkg_head;
723 uint64_t pkg_value;
725 int offset;
727 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
729 if (*ret_buffer_len < packet_len)
730 return (-1);
732 pkg_head.type = htons (type);
733 pkg_head.length = htons (packet_len);
734 pkg_value = htonll (value);
736 packet_ptr = *ret_buffer;
737 offset = 0;
738 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
739 offset += sizeof (pkg_head);
740 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
741 offset += sizeof (pkg_value);
743 assert (offset == packet_len);
745 *ret_buffer = packet_ptr + packet_len;
746 *ret_buffer_len -= packet_len;
748 return (0);
749 } /* int write_part_number */
751 static int write_part_string (char **ret_buffer, int *ret_buffer_len,
752 int type, const char *str, int str_len)
753 {
754 char *buffer;
755 int buffer_len;
757 uint16_t pkg_type;
758 uint16_t pkg_length;
760 int offset;
762 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
763 if (*ret_buffer_len < buffer_len)
764 return (-1);
766 pkg_type = htons (type);
767 pkg_length = htons (buffer_len);
769 buffer = *ret_buffer;
770 offset = 0;
771 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
772 offset += sizeof (pkg_type);
773 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
774 offset += sizeof (pkg_length);
775 memcpy (buffer + offset, str, str_len);
776 offset += str_len;
777 memset (buffer + offset, '\0', 1);
778 offset += 1;
780 assert (offset == buffer_len);
782 *ret_buffer = buffer + buffer_len;
783 *ret_buffer_len -= buffer_len;
785 return (0);
786 } /* int write_part_string */
788 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
789 value_t **ret_values, int *ret_num_values)
790 {
791 char *buffer = *ret_buffer;
792 size_t buffer_len = *ret_buffer_len;
794 uint16_t tmp16;
795 size_t exp_size;
796 int i;
798 uint16_t pkg_length;
799 uint16_t pkg_type;
800 uint16_t pkg_numval;
802 uint8_t *pkg_types;
803 value_t *pkg_values;
805 if (buffer_len < 15)
806 {
807 NOTICE ("network plugin: packet is too short: "
808 "buffer_len = %zu", buffer_len);
809 return (-1);
810 }
812 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
813 buffer += sizeof (tmp16);
814 pkg_type = ntohs (tmp16);
816 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
817 buffer += sizeof (tmp16);
818 pkg_length = ntohs (tmp16);
820 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
821 buffer += sizeof (tmp16);
822 pkg_numval = ntohs (tmp16);
824 assert (pkg_type == TYPE_VALUES);
826 exp_size = 3 * sizeof (uint16_t)
827 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
828 if (buffer_len < exp_size)
829 {
830 WARNING ("network plugin: parse_part_values: "
831 "Packet too short: "
832 "Chunk of size %zu expected, "
833 "but buffer has only %zu bytes left.",
834 exp_size, buffer_len);
835 return (-1);
836 }
838 if (pkg_length != exp_size)
839 {
840 WARNING ("network plugin: parse_part_values: "
841 "Length and number of values "
842 "in the packet don't match.");
843 return (-1);
844 }
846 pkg_types = (uint8_t *) malloc (pkg_numval * sizeof (uint8_t));
847 pkg_values = (value_t *) malloc (pkg_numval * sizeof (value_t));
848 if ((pkg_types == NULL) || (pkg_values == NULL))
849 {
850 sfree (pkg_types);
851 sfree (pkg_values);
852 ERROR ("network plugin: parse_part_values: malloc failed.");
853 return (-1);
854 }
856 memcpy ((void *) pkg_types, (void *) buffer, pkg_numval * sizeof (uint8_t));
857 buffer += pkg_numval * sizeof (uint8_t);
858 memcpy ((void *) pkg_values, (void *) buffer, pkg_numval * sizeof (value_t));
859 buffer += pkg_numval * sizeof (value_t);
861 for (i = 0; i < pkg_numval; i++)
862 {
863 switch (pkg_types[i])
864 {
865 case DS_TYPE_COUNTER:
866 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
867 break;
869 case DS_TYPE_GAUGE:
870 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
871 break;
873 case DS_TYPE_DERIVE:
874 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
875 break;
877 case DS_TYPE_ABSOLUTE:
878 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
879 break;
881 default:
882 NOTICE ("network plugin: parse_part_values: "
883 "Don't know how to handle data source type %"PRIu8,
884 pkg_types[i]);
885 sfree (pkg_types);
886 sfree (pkg_values);
887 return (-1);
888 } /* switch (pkg_types[i]) */
889 }
891 *ret_buffer = buffer;
892 *ret_buffer_len = buffer_len - pkg_length;
893 *ret_num_values = pkg_numval;
894 *ret_values = pkg_values;
896 sfree (pkg_types);
898 return (0);
899 } /* int parse_part_values */
901 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
902 uint64_t *value)
903 {
904 char *buffer = *ret_buffer;
905 size_t buffer_len = *ret_buffer_len;
907 uint16_t tmp16;
908 uint64_t tmp64;
909 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
911 uint16_t pkg_length;
913 if (buffer_len < exp_size)
914 {
915 WARNING ("network plugin: parse_part_number: "
916 "Packet too short: "
917 "Chunk of size %zu expected, "
918 "but buffer has only %zu bytes left.",
919 exp_size, buffer_len);
920 return (-1);
921 }
923 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
924 buffer += sizeof (tmp16);
925 /* pkg_type = ntohs (tmp16); */
927 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
928 buffer += sizeof (tmp16);
929 pkg_length = ntohs (tmp16);
931 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
932 buffer += sizeof (tmp64);
933 *value = ntohll (tmp64);
935 *ret_buffer = buffer;
936 *ret_buffer_len = buffer_len - pkg_length;
938 return (0);
939 } /* int parse_part_number */
941 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
942 char *output, size_t const output_len)
943 {
944 char *buffer = *ret_buffer;
945 size_t buffer_len = *ret_buffer_len;
947 uint16_t tmp16;
948 size_t const header_size = 2 * sizeof (uint16_t);
950 uint16_t pkg_length;
951 size_t payload_size;
953 if (output_len <= 0)
954 return (EINVAL);
956 if (buffer_len < header_size)
957 {
958 WARNING ("network plugin: parse_part_string: "
959 "Packet too short: "
960 "Chunk of at least size %zu expected, "
961 "but buffer has only %zu bytes left.",
962 header_size, buffer_len);
963 return (-1);
964 }
966 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
967 buffer += sizeof (tmp16);
968 /* pkg_type = ntohs (tmp16); */
970 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
971 buffer += sizeof (tmp16);
972 pkg_length = ntohs (tmp16);
973 payload_size = ((size_t) pkg_length) - header_size;
975 /* Check that packet fits in the input buffer */
976 if (pkg_length > buffer_len)
977 {
978 WARNING ("network plugin: parse_part_string: "
979 "Packet too big: "
980 "Chunk of size %"PRIu16" received, "
981 "but buffer has only %zu bytes left.",
982 pkg_length, buffer_len);
983 return (-1);
984 }
986 /* Check that pkg_length is in the valid range */
987 if (pkg_length <= header_size)
988 {
989 WARNING ("network plugin: parse_part_string: "
990 "Packet too short: "
991 "Header claims this packet is only %hu "
992 "bytes long.", pkg_length);
993 return (-1);
994 }
996 /* Check that the package data fits into the output buffer.
997 * The previous if-statement ensures that:
998 * `pkg_length > header_size' */
999 if (output_len < payload_size)
1000 {
1001 WARNING ("network plugin: parse_part_string: "
1002 "Buffer too small: "
1003 "Output buffer holds %zu bytes, "
1004 "which is too small to hold the received "
1005 "%zu byte string.",
1006 output_len, payload_size);
1007 return (-1);
1008 }
1010 /* All sanity checks successfull, let's copy the data over */
1011 memcpy ((void *) output, (void *) buffer, payload_size);
1012 buffer += payload_size;
1014 /* For some very weird reason '\0' doesn't do the trick on SPARC in
1015 * this statement. */
1016 if (output[payload_size - 1] != 0)
1017 {
1018 WARNING ("network plugin: parse_part_string: "
1019 "Received string does not end "
1020 "with a NULL-byte.");
1021 return (-1);
1022 }
1024 *ret_buffer = buffer;
1025 *ret_buffer_len = buffer_len - pkg_length;
1027 return (0);
1028 } /* int parse_part_string */
1030 /* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
1031 * parse_packet and vice versa. */
1032 #define PP_SIGNED 0x01
1033 #define PP_ENCRYPTED 0x02
1034 static int parse_packet (sockent_t *se,
1035 void *buffer, size_t buffer_size, int flags,
1036 const char *username);
1038 #define BUFFER_READ(p,s) do { \
1039 memcpy ((p), buffer + buffer_offset, (s)); \
1040 buffer_offset += (s); \
1041 } while (0)
1043 #if HAVE_LIBGCRYPT
1044 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1045 void **ret_buffer, size_t *ret_buffer_len, int flags)
1046 {
1047 static c_complain_t complain_no_users = C_COMPLAIN_INIT_STATIC;
1049 char *buffer;
1050 size_t buffer_len;
1051 size_t buffer_offset;
1053 size_t username_len;
1054 char *secret;
1056 part_signature_sha256_t pss;
1057 uint16_t pss_head_length;
1058 char hash[sizeof (pss.hash)];
1060 gcry_md_hd_t hd;
1061 gcry_error_t err;
1062 unsigned char *hash_ptr;
1064 buffer = *ret_buffer;
1065 buffer_len = *ret_buffer_len;
1066 buffer_offset = 0;
1068 if (se->data.server.userdb == NULL)
1069 {
1070 c_complain (LOG_NOTICE, &complain_no_users,
1071 "network plugin: Received signed network packet but can't verify it "
1072 "because no user DB has been configured. Will accept it.");
1073 return (0);
1074 }
1076 /* Check if the buffer has enough data for this structure. */
1077 if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
1078 return (-ENOMEM);
1080 /* Read type and length header */
1081 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1082 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1083 pss_head_length = ntohs (pss.head.length);
1085 /* Check if the `pss_head_length' is within bounds. */
1086 if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE)
1087 || (pss_head_length > buffer_len))
1088 {
1089 ERROR ("network plugin: HMAC-SHA-256 with invalid length received.");
1090 return (-1);
1091 }
1093 /* Copy the hash. */
1094 BUFFER_READ (pss.hash, sizeof (pss.hash));
1096 /* Calculate username length (without null byte) and allocate memory */
1097 username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
1098 pss.username = malloc (username_len + 1);
1099 if (pss.username == NULL)
1100 return (-ENOMEM);
1102 /* Read the username */
1103 BUFFER_READ (pss.username, username_len);
1104 pss.username[username_len] = 0;
1106 assert (buffer_offset == pss_head_length);
1108 /* Query the password */
1109 secret = fbh_get (se->data.server.userdb, pss.username);
1110 if (secret == NULL)
1111 {
1112 ERROR ("network plugin: Unknown user: %s", pss.username);
1113 sfree (pss.username);
1114 return (-ENOENT);
1115 }
1117 /* Create a hash device and check the HMAC */
1118 hd = NULL;
1119 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
1120 if (err != 0)
1121 {
1122 ERROR ("network plugin: Creating HMAC-SHA-256 object failed: %s",
1123 gcry_strerror (err));
1124 sfree (secret);
1125 sfree (pss.username);
1126 return (-1);
1127 }
1129 err = gcry_md_setkey (hd, secret, strlen (secret));
1130 if (err != 0)
1131 {
1132 ERROR ("network plugin: gcry_md_setkey failed: %s", gcry_strerror (err));
1133 gcry_md_close (hd);
1134 sfree (secret);
1135 sfree (pss.username);
1136 return (-1);
1137 }
1139 gcry_md_write (hd,
1140 buffer + PART_SIGNATURE_SHA256_SIZE,
1141 buffer_len - PART_SIGNATURE_SHA256_SIZE);
1142 hash_ptr = gcry_md_read (hd, GCRY_MD_SHA256);
1143 if (hash_ptr == NULL)
1144 {
1145 ERROR ("network plugin: gcry_md_read failed.");
1146 gcry_md_close (hd);
1147 sfree (secret);
1148 sfree (pss.username);
1149 return (-1);
1150 }
1151 memcpy (hash, hash_ptr, sizeof (hash));
1153 /* Clean up */
1154 gcry_md_close (hd);
1155 hd = NULL;
1157 if (memcmp (pss.hash, hash, sizeof (pss.hash)) != 0)
1158 {
1159 WARNING ("network plugin: Verifying HMAC-SHA-256 signature failed: "
1160 "Hash mismatch.");
1161 }
1162 else
1163 {
1164 parse_packet (se, buffer + buffer_offset, buffer_len - buffer_offset,
1165 flags | PP_SIGNED, pss.username);
1166 }
1168 sfree (secret);
1169 sfree (pss.username);
1171 *ret_buffer = buffer + buffer_len;
1172 *ret_buffer_len = 0;
1174 return (0);
1175 } /* }}} int parse_part_sign_sha256 */
1176 /* #endif HAVE_LIBGCRYPT */
1178 #else /* if !HAVE_LIBGCRYPT */
1179 static int parse_part_sign_sha256 (sockent_t *se, /* {{{ */
1180 void **ret_buffer, size_t *ret_buffer_size, int flags)
1181 {
1182 static int warning_has_been_printed = 0;
1184 char *buffer;
1185 size_t buffer_size;
1186 size_t buffer_offset;
1187 uint16_t part_len;
1189 part_signature_sha256_t pss;
1191 buffer = *ret_buffer;
1192 buffer_size = *ret_buffer_size;
1193 buffer_offset = 0;
1195 if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
1196 return (-ENOMEM);
1198 BUFFER_READ (&pss.head.type, sizeof (pss.head.type));
1199 BUFFER_READ (&pss.head.length, sizeof (pss.head.length));
1200 part_len = ntohs (pss.head.length);
1202 if ((part_len <= PART_SIGNATURE_SHA256_SIZE)
1203 || (part_len > buffer_size))
1204 return (-EINVAL);
1206 if (warning_has_been_printed == 0)
1207 {
1208 WARNING ("network plugin: Received signed packet, but the network "
1209 "plugin was not linked with libgcrypt, so I cannot "
1210 "verify the signature. The packet will be accepted.");
1211 warning_has_been_printed = 1;
1212 }
1214 parse_packet (se, buffer + part_len, buffer_size - part_len, flags,
1215 /* username = */ NULL);
1217 *ret_buffer = buffer + buffer_size;
1218 *ret_buffer_size = 0;
1220 return (0);
1221 } /* }}} int parse_part_sign_sha256 */
1222 #endif /* !HAVE_LIBGCRYPT */
1224 #if HAVE_LIBGCRYPT
1225 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1226 void **ret_buffer, size_t *ret_buffer_len,
1227 int flags)
1228 {
1229 char *buffer = *ret_buffer;
1230 size_t buffer_len = *ret_buffer_len;
1231 size_t payload_len;
1232 size_t part_size;
1233 size_t buffer_offset;
1234 uint16_t username_len;
1235 part_encryption_aes256_t pea;
1236 unsigned char hash[sizeof (pea.hash)];
1238 gcry_cipher_hd_t cypher;
1239 gcry_error_t err;
1241 /* Make sure at least the header if available. */
1242 if (buffer_len <= PART_ENCRYPTION_AES256_SIZE)
1243 {
1244 NOTICE ("network plugin: parse_part_encr_aes256: "
1245 "Discarding short packet.");
1246 return (-1);
1247 }
1249 buffer_offset = 0;
1251 /* Copy the unencrypted information into `pea'. */
1252 BUFFER_READ (&pea.head.type, sizeof (pea.head.type));
1253 BUFFER_READ (&pea.head.length, sizeof (pea.head.length));
1255 /* Check the `part size'. */
1256 part_size = ntohs (pea.head.length);
1257 if ((part_size <= PART_ENCRYPTION_AES256_SIZE)
1258 || (part_size > buffer_len))
1259 {
1260 NOTICE ("network plugin: parse_part_encr_aes256: "
1261 "Discarding part with invalid size.");
1262 return (-1);
1263 }
1265 /* Read the username */
1266 BUFFER_READ (&username_len, sizeof (username_len));
1267 username_len = ntohs (username_len);
1269 if ((username_len <= 0)
1270 || (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1))))
1271 {
1272 NOTICE ("network plugin: parse_part_encr_aes256: "
1273 "Discarding part with invalid username length.");
1274 return (-1);
1275 }
1277 assert (username_len > 0);
1278 pea.username = malloc (username_len + 1);
1279 if (pea.username == NULL)
1280 return (-ENOMEM);
1281 BUFFER_READ (pea.username, username_len);
1282 pea.username[username_len] = 0;
1284 /* Last but not least, the initialization vector */
1285 BUFFER_READ (pea.iv, sizeof (pea.iv));
1287 /* Make sure we are at the right position */
1288 assert (buffer_offset == (username_len +
1289 PART_ENCRYPTION_AES256_SIZE - sizeof (pea.hash)));
1291 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
1292 pea.username);
1293 if (cypher == NULL)
1294 {
1295 sfree (pea.username);
1296 return (-1);
1297 }
1299 payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
1300 assert (payload_len > 0);
1302 /* Decrypt the packet in-place */
1303 err = gcry_cipher_decrypt (cypher,
1304 buffer + buffer_offset,
1305 part_size - buffer_offset,
1306 /* in = */ NULL, /* in len = */ 0);
1307 if (err != 0)
1308 {
1309 sfree (pea.username);
1310 ERROR ("network plugin: gcry_cipher_decrypt returned: %s",
1311 gcry_strerror (err));
1312 return (-1);
1313 }
1315 /* Read the hash */
1316 BUFFER_READ (pea.hash, sizeof (pea.hash));
1318 /* Make sure we're at the right position - again */
1319 assert (buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
1320 assert (buffer_offset == (part_size - payload_len));
1322 /* Check hash sum */
1323 memset (hash, 0, sizeof (hash));
1324 gcry_md_hash_buffer (GCRY_MD_SHA1, hash,
1325 buffer + buffer_offset, payload_len);
1326 if (memcmp (hash, pea.hash, sizeof (hash)) != 0)
1327 {
1328 sfree (pea.username);
1329 ERROR ("network plugin: Decryption failed: Checksum mismatch.");
1330 return (-1);
1331 }
1333 parse_packet (se, buffer + buffer_offset, payload_len,
1334 flags | PP_ENCRYPTED, pea.username);
1336 /* XXX: Free pea.username?!? */
1338 /* Update return values */
1339 *ret_buffer = buffer + part_size;
1340 *ret_buffer_len = buffer_len - part_size;
1342 sfree (pea.username);
1344 return (0);
1345 } /* }}} int parse_part_encr_aes256 */
1346 /* #endif HAVE_LIBGCRYPT */
1348 #else /* if !HAVE_LIBGCRYPT */
1349 static int parse_part_encr_aes256 (sockent_t *se, /* {{{ */
1350 void **ret_buffer, size_t *ret_buffer_size, int flags)
1351 {
1352 static int warning_has_been_printed = 0;
1354 char *buffer;
1355 size_t buffer_size;
1356 size_t buffer_offset;
1358 part_header_t ph;
1359 size_t ph_length;
1361 buffer = *ret_buffer;
1362 buffer_size = *ret_buffer_size;
1363 buffer_offset = 0;
1365 /* parse_packet assures this minimum size. */
1366 assert (buffer_size >= (sizeof (ph.type) + sizeof (ph.length)));
1368 BUFFER_READ (&ph.type, sizeof (ph.type));
1369 BUFFER_READ (&ph.length, sizeof (ph.length));
1370 ph_length = ntohs (ph.length);
1372 if ((ph_length <= PART_ENCRYPTION_AES256_SIZE)
1373 || (ph_length > buffer_size))
1374 {
1375 ERROR ("network plugin: AES-256 encrypted part "
1376 "with invalid length received.");
1377 return (-1);
1378 }
1380 if (warning_has_been_printed == 0)
1381 {
1382 WARNING ("network plugin: Received encrypted packet, but the network "
1383 "plugin was not linked with libgcrypt, so I cannot "
1384 "decrypt it. The part will be discarded.");
1385 warning_has_been_printed = 1;
1386 }
1388 *ret_buffer += ph_length;
1389 *ret_buffer_size -= ph_length;
1391 return (0);
1392 } /* }}} int parse_part_encr_aes256 */
1393 #endif /* !HAVE_LIBGCRYPT */
1395 #undef BUFFER_READ
1397 static int parse_packet (sockent_t *se, /* {{{ */
1398 void *buffer, size_t buffer_size, int flags,
1399 const char *username)
1400 {
1401 int status;
1403 value_list_t vl = VALUE_LIST_INIT;
1404 notification_t n;
1406 #if HAVE_LIBGCRYPT
1407 int packet_was_signed = (flags & PP_SIGNED);
1408 int packet_was_encrypted = (flags & PP_ENCRYPTED);
1409 int printed_ignore_warning = 0;
1410 #endif /* HAVE_LIBGCRYPT */
1413 memset (&vl, '\0', sizeof (vl));
1414 memset (&n, '\0', sizeof (n));
1415 status = 0;
1417 while ((status == 0) && (0 < buffer_size)
1418 && ((unsigned int) buffer_size > sizeof (part_header_t)))
1419 {
1420 uint16_t pkg_length;
1421 uint16_t pkg_type;
1423 memcpy ((void *) &pkg_type,
1424 (void *) buffer,
1425 sizeof (pkg_type));
1426 memcpy ((void *) &pkg_length,
1427 (void *) (buffer + sizeof (pkg_type)),
1428 sizeof (pkg_length));
1430 pkg_length = ntohs (pkg_length);
1431 pkg_type = ntohs (pkg_type);
1433 if (pkg_length > buffer_size)
1434 break;
1435 /* Ensure that this loop terminates eventually */
1436 if (pkg_length < (2 * sizeof (uint16_t)))
1437 break;
1439 if (pkg_type == TYPE_ENCR_AES256)
1440 {
1441 status = parse_part_encr_aes256 (se,
1442 &buffer, &buffer_size, flags);
1443 if (status != 0)
1444 {
1445 ERROR ("network plugin: Decrypting AES256 "
1446 "part failed "
1447 "with status %i.", status);
1448 break;
1449 }
1450 }
1451 #if HAVE_LIBGCRYPT
1452 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
1453 && (packet_was_encrypted == 0))
1454 {
1455 if (printed_ignore_warning == 0)
1456 {
1457 INFO ("network plugin: Unencrypted packet or "
1458 "part has been ignored.");
1459 printed_ignore_warning = 1;
1460 }
1461 buffer = ((char *) buffer) + pkg_length;
1462 buffer_size -= (size_t) pkg_length;
1463 continue;
1464 }
1465 #endif /* HAVE_LIBGCRYPT */
1466 else if (pkg_type == TYPE_SIGN_SHA256)
1467 {
1468 status = parse_part_sign_sha256 (se,
1469 &buffer, &buffer_size, flags);
1470 if (status != 0)
1471 {
1472 ERROR ("network plugin: Verifying HMAC-SHA-256 "
1473 "signature failed "
1474 "with status %i.", status);
1475 break;
1476 }
1477 }
1478 #if HAVE_LIBGCRYPT
1479 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
1480 && (packet_was_encrypted == 0)
1481 && (packet_was_signed == 0))
1482 {
1483 if (printed_ignore_warning == 0)
1484 {
1485 INFO ("network plugin: Unsigned packet or "
1486 "part has been ignored.");
1487 printed_ignore_warning = 1;
1488 }
1489 buffer = ((char *) buffer) + pkg_length;
1490 buffer_size -= (size_t) pkg_length;
1491 continue;
1492 }
1493 #endif /* HAVE_LIBGCRYPT */
1494 else if (pkg_type == TYPE_VALUES)
1495 {
1496 status = parse_part_values (&buffer, &buffer_size,
1497 &vl.values, &vl.values_len);
1498 if (status != 0)
1499 break;
1501 network_dispatch_values (&vl, username);
1503 sfree (vl.values);
1504 }
1505 else if (pkg_type == TYPE_TIME)
1506 {
1507 uint64_t tmp = 0;
1508 status = parse_part_number (&buffer, &buffer_size,
1509 &tmp);
1510 if (status == 0)
1511 {
1512 vl.time = TIME_T_TO_CDTIME_T (tmp);
1513 n.time = TIME_T_TO_CDTIME_T (tmp);
1514 }
1515 }
1516 else if (pkg_type == TYPE_TIME_HR)
1517 {
1518 uint64_t tmp = 0;
1519 status = parse_part_number (&buffer, &buffer_size,
1520 &tmp);
1521 if (status == 0)
1522 {
1523 vl.time = (cdtime_t) tmp;
1524 n.time = (cdtime_t) tmp;
1525 }
1526 }
1527 else if (pkg_type == TYPE_INTERVAL)
1528 {
1529 uint64_t tmp = 0;
1530 status = parse_part_number (&buffer, &buffer_size,
1531 &tmp);
1532 if (status == 0)
1533 vl.interval = TIME_T_TO_CDTIME_T (tmp);
1534 }
1535 else if (pkg_type == TYPE_INTERVAL_HR)
1536 {
1537 uint64_t tmp = 0;
1538 status = parse_part_number (&buffer, &buffer_size,
1539 &tmp);
1540 if (status == 0)
1541 vl.interval = (cdtime_t) tmp;
1542 }
1543 else if (pkg_type == TYPE_HOST)
1544 {
1545 status = parse_part_string (&buffer, &buffer_size,
1546 vl.host, sizeof (vl.host));
1547 if (status == 0)
1548 sstrncpy (n.host, vl.host, sizeof (n.host));
1549 }
1550 else if (pkg_type == TYPE_PLUGIN)
1551 {
1552 status = parse_part_string (&buffer, &buffer_size,
1553 vl.plugin, sizeof (vl.plugin));
1554 if (status == 0)
1555 sstrncpy (n.plugin, vl.plugin,
1556 sizeof (n.plugin));
1557 }
1558 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
1559 {
1560 status = parse_part_string (&buffer, &buffer_size,
1561 vl.plugin_instance,
1562 sizeof (vl.plugin_instance));
1563 if (status == 0)
1564 sstrncpy (n.plugin_instance,
1565 vl.plugin_instance,
1566 sizeof (n.plugin_instance));
1567 }
1568 else if (pkg_type == TYPE_TYPE)
1569 {
1570 status = parse_part_string (&buffer, &buffer_size,
1571 vl.type, sizeof (vl.type));
1572 if (status == 0)
1573 sstrncpy (n.type, vl.type, sizeof (n.type));
1574 }
1575 else if (pkg_type == TYPE_TYPE_INSTANCE)
1576 {
1577 status = parse_part_string (&buffer, &buffer_size,
1578 vl.type_instance,
1579 sizeof (vl.type_instance));
1580 if (status == 0)
1581 sstrncpy (n.type_instance, vl.type_instance,
1582 sizeof (n.type_instance));
1583 }
1584 else if (pkg_type == TYPE_MESSAGE)
1585 {
1586 status = parse_part_string (&buffer, &buffer_size,
1587 n.message, sizeof (n.message));
1589 if (status != 0)
1590 {
1591 /* do nothing */
1592 }
1593 else if ((n.severity != NOTIF_FAILURE)
1594 && (n.severity != NOTIF_WARNING)
1595 && (n.severity != NOTIF_OKAY))
1596 {
1597 INFO ("network plugin: "
1598 "Ignoring notification with "
1599 "unknown severity %i.",
1600 n.severity);
1601 }
1602 else if (n.time <= 0)
1603 {
1604 INFO ("network plugin: "
1605 "Ignoring notification with "
1606 "time == 0.");
1607 }
1608 else if (strlen (n.message) <= 0)
1609 {
1610 INFO ("network plugin: "
1611 "Ignoring notification with "
1612 "an empty message.");
1613 }
1614 else
1615 {
1616 network_dispatch_notification (&n);
1617 }
1618 }
1619 else if (pkg_type == TYPE_SEVERITY)
1620 {
1621 uint64_t tmp = 0;
1622 status = parse_part_number (&buffer, &buffer_size,
1623 &tmp);
1624 if (status == 0)
1625 n.severity = (int) tmp;
1626 }
1627 else
1628 {
1629 DEBUG ("network plugin: parse_packet: Unknown part"
1630 " type: 0x%04hx", pkg_type);
1631 buffer = ((char *) buffer) + pkg_length;
1632 buffer_size -= (size_t) pkg_length;
1633 }
1634 } /* while (buffer_size > sizeof (part_header_t)) */
1636 if (status == 0 && buffer_size > 0)
1637 WARNING ("network plugin: parse_packet: Received truncated "
1638 "packet, try increasing `MaxPacketSize'");
1640 return (status);
1641 } /* }}} int parse_packet */
1643 static void free_sockent_client (struct sockent_client *sec) /* {{{ */
1644 {
1645 if (sec->fd >= 0)
1646 {
1647 close (sec->fd);
1648 sec->fd = -1;
1649 }
1650 sfree (sec->addr);
1651 #if HAVE_LIBGCRYPT
1652 sfree (sec->username);
1653 sfree (sec->password);
1654 if (sec->cypher != NULL)
1655 gcry_cipher_close (sec->cypher);
1656 #endif
1657 } /* }}} void free_sockent_client */
1659 static void free_sockent_server (struct sockent_server *ses) /* {{{ */
1660 {
1661 size_t i;
1663 for (i = 0; i < ses->fd_num; i++)
1664 {
1665 if (ses->fd[i] >= 0)
1666 {
1667 close (ses->fd[i]);
1668 ses->fd[i] = -1;
1669 }
1670 }
1672 sfree (ses->fd);
1673 #if HAVE_LIBGCRYPT
1674 sfree (ses->auth_file);
1675 fbh_destroy (ses->userdb);
1676 if (ses->cypher != NULL)
1677 gcry_cipher_close (ses->cypher);
1678 #endif
1679 } /* }}} void free_sockent_server */
1681 static void sockent_destroy (sockent_t *se) /* {{{ */
1682 {
1683 sockent_t *next;
1685 DEBUG ("network plugin: sockent_destroy (se = %p);", (void *) se);
1687 while (se != NULL)
1688 {
1689 next = se->next;
1691 sfree (se->node);
1692 sfree (se->service);
1694 if (se->type == SOCKENT_TYPE_CLIENT)
1695 free_sockent_client (&se->data.client);
1696 else
1697 free_sockent_server (&se->data.server);
1699 sfree (se);
1700 se = next;
1701 }
1702 } /* }}} void sockent_destroy */
1704 /*
1705 * int network_set_ttl
1706 *
1707 * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
1708 * `IPV6_UNICAST_HOPS', depending on which option is applicable.
1709 *
1710 * The `struct addrinfo' is used to destinguish between unicast and multicast
1711 * sockets.
1712 */
1713 static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai)
1714 {
1715 DEBUG ("network plugin: network_set_ttl: network_config_ttl = %i;",
1716 network_config_ttl);
1718 assert (se->type == SOCKENT_TYPE_CLIENT);
1720 if ((network_config_ttl < 1) || (network_config_ttl > 255))
1721 return (-1);
1723 if (ai->ai_family == AF_INET)
1724 {
1725 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1726 int optname;
1728 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1729 optname = IP_MULTICAST_TTL;
1730 else
1731 optname = IP_TTL;
1733 if (setsockopt (se->data.client.fd, IPPROTO_IP, optname,
1734 &network_config_ttl,
1735 sizeof (network_config_ttl)) != 0)
1736 {
1737 char errbuf[1024];
1738 ERROR ("network plugin: setsockopt (ipv4-ttl): %s",
1739 sstrerror (errno, errbuf, sizeof (errbuf)));
1740 return (-1);
1741 }
1742 }
1743 else if (ai->ai_family == AF_INET6)
1744 {
1745 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1746 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1747 int optname;
1749 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1750 optname = IPV6_MULTICAST_HOPS;
1751 else
1752 optname = IPV6_UNICAST_HOPS;
1754 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, optname,
1755 &network_config_ttl,
1756 sizeof (network_config_ttl)) != 0)
1757 {
1758 char errbuf[1024];
1759 ERROR ("network plugin: setsockopt(ipv6-ttl): %s",
1760 sstrerror (errno, errbuf,
1761 sizeof (errbuf)));
1762 return (-1);
1763 }
1764 }
1766 return (0);
1767 } /* int network_set_ttl */
1769 static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
1770 {
1771 DEBUG ("network plugin: network_set_interface: interface index = %i;",
1772 se->interface);
1774 assert (se->type == SOCKENT_TYPE_CLIENT);
1776 if (ai->ai_family == AF_INET)
1777 {
1778 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1780 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1781 {
1782 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1783 /* If possible, use the "ip_mreqn" structure which has
1784 * an "interface index" member. Using the interface
1785 * index is preferred here, because of its similarity
1786 * to the way IPv6 handles this. Unfortunately, it
1787 * appears not to be portable. */
1788 struct ip_mreqn mreq;
1790 memset (&mreq, 0, sizeof (mreq));
1791 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1792 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1793 mreq.imr_ifindex = se->interface;
1794 #else
1795 struct ip_mreq mreq;
1797 memset (&mreq, 0, sizeof (mreq));
1798 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1799 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1800 #endif
1802 if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
1803 &mreq, sizeof (mreq)) != 0)
1804 {
1805 char errbuf[1024];
1806 ERROR ("network plugin: setsockopt (ipv4-multicast-if): %s",
1807 sstrerror (errno, errbuf, sizeof (errbuf)));
1808 return (-1);
1809 }
1811 return (0);
1812 }
1813 }
1814 else if (ai->ai_family == AF_INET6)
1815 {
1816 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1818 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1819 {
1820 if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
1821 &se->interface,
1822 sizeof (se->interface)) != 0)
1823 {
1824 char errbuf[1024];
1825 ERROR ("network plugin: setsockopt (ipv6-multicast-if): %s",
1826 sstrerror (errno, errbuf,
1827 sizeof (errbuf)));
1828 return (-1);
1829 }
1831 return (0);
1832 }
1833 }
1835 /* else: Not a multicast interface. */
1836 if (se->interface != 0)
1837 {
1838 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1839 char interface_name[IFNAMSIZ];
1841 if (if_indextoname (se->interface, interface_name) == NULL)
1842 return (-1);
1844 DEBUG ("network plugin: Binding socket to interface %s", interface_name);
1846 if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
1847 interface_name,
1848 sizeof(interface_name)) == -1 )
1849 {
1850 char errbuf[1024];
1851 ERROR ("network plugin: setsockopt (bind-if): %s",
1852 sstrerror (errno, errbuf, sizeof (errbuf)));
1853 return (-1);
1854 }
1855 /* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
1857 #else
1858 WARNING ("network plugin: Cannot set the interface on a unicast "
1859 "socket because "
1860 # if !defined(SO_BINDTODEVICE)
1861 "the \"SO_BINDTODEVICE\" socket option "
1862 # else
1863 "the \"if_indextoname\" function "
1864 # endif
1865 "is not available on your system.");
1866 #endif
1868 }
1870 return (0);
1871 } /* }}} network_set_interface */
1873 static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
1874 {
1875 #if KERNEL_SOLARIS
1876 char loop = 0;
1877 #else
1878 int loop = 0;
1879 #endif
1880 int yes = 1;
1882 /* allow multiple sockets to use the same PORT number */
1883 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR,
1884 &yes, sizeof(yes)) == -1) {
1885 char errbuf[1024];
1886 ERROR ("network plugin: setsockopt (reuseaddr): %s",
1887 sstrerror (errno, errbuf, sizeof (errbuf)));
1888 return (-1);
1889 }
1891 DEBUG ("fd = %i; calling `bind'", fd);
1893 if (bind (fd, ai->ai_addr, ai->ai_addrlen) == -1)
1894 {
1895 char errbuf[1024];
1896 ERROR ("bind: %s",
1897 sstrerror (errno, errbuf, sizeof (errbuf)));
1898 return (-1);
1899 }
1901 if (ai->ai_family == AF_INET)
1902 {
1903 struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
1904 if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
1905 {
1906 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1907 struct ip_mreqn mreq;
1908 #else
1909 struct ip_mreq mreq;
1910 #endif
1912 DEBUG ("fd = %i; IPv4 multicast address found", fd);
1914 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
1915 #if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
1916 /* Set the interface using the interface index if
1917 * possible (available). Unfortunately, the struct
1918 * ip_mreqn is not portable. */
1919 mreq.imr_address.s_addr = ntohl (INADDR_ANY);
1920 mreq.imr_ifindex = interface_idx;
1921 #else
1922 mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
1923 #endif
1925 if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1926 &loop, sizeof (loop)) == -1)
1927 {
1928 char errbuf[1024];
1929 ERROR ("network plugin: setsockopt (multicast-loop): %s",
1930 sstrerror (errno, errbuf,
1931 sizeof (errbuf)));
1932 return (-1);
1933 }
1935 if (setsockopt (fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1936 &mreq, sizeof (mreq)) == -1)
1937 {
1938 char errbuf[1024];
1939 ERROR ("network plugin: setsockopt (add-membership): %s",
1940 sstrerror (errno, errbuf,
1941 sizeof (errbuf)));
1942 return (-1);
1943 }
1945 return (0);
1946 }
1947 }
1948 else if (ai->ai_family == AF_INET6)
1949 {
1950 /* Useful example: http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
1951 struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
1952 if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
1953 {
1954 struct ipv6_mreq mreq;
1956 DEBUG ("fd = %i; IPv6 multicast address found", fd);
1958 memcpy (&mreq.ipv6mr_multiaddr,
1959 &addr->sin6_addr,
1960 sizeof (addr->sin6_addr));
1962 /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
1963 * ipv6mr_interface may be set to zeroes to
1964 * choose the default multicast interface or to
1965 * the index of a particular multicast-capable
1966 * interface if the host is multihomed.
1967 * Membership is associ-associated with a
1968 * single interface; programs running on
1969 * multihomed hosts may need to join the same
1970 * group on more than one interface.*/
1971 mreq.ipv6mr_interface = interface_idx;
1973 if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1974 &loop, sizeof (loop)) == -1)
1975 {
1976 char errbuf[1024];
1977 ERROR ("network plugin: setsockopt (ipv6-multicast-loop): %s",
1978 sstrerror (errno, errbuf,
1979 sizeof (errbuf)));
1980 return (-1);
1981 }
1983 if (setsockopt (fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
1984 &mreq, sizeof (mreq)) == -1)
1985 {
1986 char errbuf[1024];
1987 ERROR ("network plugin: setsockopt (ipv6-add-membership): %s",
1988 sstrerror (errno, errbuf,
1989 sizeof (errbuf)));
1990 return (-1);
1991 }
1993 return (0);
1994 }
1995 }
1997 #if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
1998 /* if a specific interface was set, bind the socket to it. But to avoid
1999 * possible problems with multicast routing, only do that for non-multicast
2000 * addresses */
2001 if (interface_idx != 0)
2002 {
2003 char interface_name[IFNAMSIZ];
2005 if (if_indextoname (interface_idx, interface_name) == NULL)
2006 return (-1);
2008 DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
2010 if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
2011 interface_name,
2012 sizeof(interface_name)) == -1 )
2013 {
2014 char errbuf[1024];
2015 ERROR ("network plugin: setsockopt (bind-if): %s",
2016 sstrerror (errno, errbuf, sizeof (errbuf)));
2017 return (-1);
2018 }
2019 }
2020 #endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
2022 return (0);
2023 } /* int network_bind_socket */
2025 /* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
2026 * or `SOCKENT_TYPE_SERVER' */
2027 static sockent_t *sockent_create (int type) /* {{{ */
2028 {
2029 sockent_t *se;
2031 if ((type != SOCKENT_TYPE_CLIENT) && (type != SOCKENT_TYPE_SERVER))
2032 return (NULL);
2034 se = malloc (sizeof (*se));
2035 if (se == NULL)
2036 return (NULL);
2037 memset (se, 0, sizeof (*se));
2039 se->type = type;
2040 se->node = NULL;
2041 se->service = NULL;
2042 se->interface = 0;
2043 se->next = NULL;
2045 if (type == SOCKENT_TYPE_SERVER)
2046 {
2047 se->data.server.fd = NULL;
2048 se->data.server.fd_num = 0;
2049 #if HAVE_LIBGCRYPT
2050 se->data.server.security_level = SECURITY_LEVEL_NONE;
2051 se->data.server.auth_file = NULL;
2052 se->data.server.userdb = NULL;
2053 se->data.server.cypher = NULL;
2054 #endif
2055 }
2056 else
2057 {
2058 se->data.client.fd = -1;
2059 se->data.client.addr = NULL;
2060 se->data.client.resolve_interval = 0;
2061 se->data.client.next_resolve_reconnect = 0;
2062 #if HAVE_LIBGCRYPT
2063 se->data.client.security_level = SECURITY_LEVEL_NONE;
2064 se->data.client.username = NULL;
2065 se->data.client.password = NULL;
2066 se->data.client.cypher = NULL;
2067 #endif
2068 }
2070 return (se);
2071 } /* }}} sockent_t *sockent_create */
2073 static int sockent_init_crypto (sockent_t *se) /* {{{ */
2074 {
2075 #if HAVE_LIBGCRYPT /* {{{ */
2076 if (se->type == SOCKENT_TYPE_CLIENT)
2077 {
2078 if (se->data.client.security_level > SECURITY_LEVEL_NONE)
2079 {
2080 network_init_gcrypt ();
2082 if ((se->data.client.username == NULL)
2083 || (se->data.client.password == NULL))
2084 {
2085 ERROR ("network plugin: Client socket with "
2086 "security requested, but no "
2087 "credentials are configured.");
2088 return (-1);
2089 }
2090 gcry_md_hash_buffer (GCRY_MD_SHA256,
2091 se->data.client.password_hash,
2092 se->data.client.password,
2093 strlen (se->data.client.password));
2094 }
2095 }
2096 else /* (se->type == SOCKENT_TYPE_SERVER) */
2097 {
2098 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2099 {
2100 network_init_gcrypt ();
2102 if (se->data.server.auth_file == NULL)
2103 {
2104 ERROR ("network plugin: Server socket with "
2105 "security requested, but no "
2106 "password file is configured.");
2107 return (-1);
2108 }
2109 }
2110 if (se->data.server.auth_file != NULL)
2111 {
2112 se->data.server.userdb = fbh_create (se->data.server.auth_file);
2113 if (se->data.server.userdb == NULL)
2114 {
2115 ERROR ("network plugin: Reading password file "
2116 "`%s' failed.",
2117 se->data.server.auth_file);
2118 if (se->data.server.security_level > SECURITY_LEVEL_NONE)
2119 return (-1);
2120 }
2121 }
2122 }
2123 #endif /* }}} HAVE_LIBGCRYPT */
2125 return (0);
2126 } /* }}} int sockent_init_crypto */
2128 static int sockent_client_disconnect (sockent_t *se) /* {{{ */
2129 {
2130 struct sockent_client *client;
2132 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2133 return (EINVAL);
2135 client = &se->data.client;
2136 if (client->fd >= 0) /* connected */
2137 {
2138 close (client->fd);
2139 client->fd = -1;
2140 }
2142 sfree (client->addr);
2143 client->addrlen = 0;
2145 return (0);
2146 } /* }}} int sockent_client_disconnect */
2148 static int sockent_client_connect (sockent_t *se) /* {{{ */
2149 {
2150 static c_complain_t complaint = C_COMPLAIN_INIT_STATIC;
2152 struct sockent_client *client;
2153 struct addrinfo ai_hints;
2154 struct addrinfo *ai_list = NULL, *ai_ptr;
2155 int status;
2156 _Bool reconnect = 0;
2157 cdtime_t now;
2159 if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
2160 return (EINVAL);
2162 client = &se->data.client;
2164 now = cdtime ();
2165 if (client->resolve_interval != 0 && client->next_resolve_reconnect < now) {
2166 DEBUG("network plugin: Reconnecting socket, resolve_interval = %lf, next_resolve_reconnect = %lf",
2167 CDTIME_T_TO_DOUBLE(client->resolve_interval), CDTIME_T_TO_DOUBLE(client->next_resolve_reconnect));
2168 reconnect = 1;
2169 }
2171 if (client->fd >= 0 && !reconnect) /* already connected and not stale*/
2172 return (0);
2174 memset (&ai_hints, 0, sizeof (ai_hints));
2175 #ifdef AI_ADDRCONFIG
2176 ai_hints.ai_flags |= AI_ADDRCONFIG;
2177 #endif
2178 ai_hints.ai_family = AF_UNSPEC;
2179 ai_hints.ai_socktype = SOCK_DGRAM;
2180 ai_hints.ai_protocol = IPPROTO_UDP;
2182 status = getaddrinfo (se->node,
2183 (se->service != NULL) ? se->service : NET_DEFAULT_PORT,
2184 &ai_hints, &ai_list);
2185 if (status != 0)
2186 {
2187 c_complain (LOG_ERR, &complaint,
2188 "network plugin: getaddrinfo (%s, %s) failed: %s",
2189 (se->node == NULL) ? "(null)" : se->node,
2190 (se->service == NULL) ? "(null)" : se->service,
2191 gai_strerror (status));
2192 return (-1);
2193 }
2194 else
2195 {
2196 c_release (LOG_NOTICE, &complaint,
2197 "network plugin: Successfully resolved \"%s\".",
2198 se->node);
2199 }
2201 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2202 {
2203 if (client->fd >= 0) /* when we reconnect */
2204 sockent_client_disconnect(se);
2206 client->fd = socket (ai_ptr->ai_family,
2207 ai_ptr->ai_socktype,
2208 ai_ptr->ai_protocol);
2209 if (client->fd < 0)
2210 {
2211 char errbuf[1024];
2212 ERROR ("network plugin: socket(2) failed: %s",
2213 sstrerror (errno, errbuf,
2214 sizeof (errbuf)));
2215 continue;
2216 }
2218 client->addr = malloc (sizeof (*client->addr));
2219 if (client->addr == NULL)
2220 {
2221 ERROR ("network plugin: malloc failed.");
2222 close (client->fd);
2223 client->fd = -1;
2224 continue;
2225 }
2227 memset (client->addr, 0, sizeof (*client->addr));
2228 assert (sizeof (*client->addr) >= ai_ptr->ai_addrlen);
2229 memcpy (client->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2230 client->addrlen = ai_ptr->ai_addrlen;
2232 network_set_ttl (se, ai_ptr);
2233 network_set_interface (se, ai_ptr);
2235 /* We don't open more than one write-socket per
2236 * node/service pair.. */
2237 break;
2238 }
2240 freeaddrinfo (ai_list);
2241 if (client->fd < 0)
2242 return (-1);
2244 if (client->resolve_interval > 0)
2245 client->next_resolve_reconnect = now + client->resolve_interval;
2246 return (0);
2247 } /* }}} int sockent_client_connect */
2249 /* Open the file descriptors for a initialized sockent structure. */
2250 static int sockent_server_listen (sockent_t *se) /* {{{ */
2251 {
2252 struct addrinfo ai_hints;
2253 struct addrinfo *ai_list, *ai_ptr;
2254 int status;
2256 const char *node;
2257 const char *service;
2259 if (se == NULL)
2260 return (-1);
2262 assert (se->data.server.fd == NULL);
2263 assert (se->data.server.fd_num == 0);
2265 node = se->node;
2266 service = se->service;
2268 if (service == NULL)
2269 service = NET_DEFAULT_PORT;
2271 DEBUG ("network plugin: sockent_server_listen: node = %s; service = %s;",
2272 node, service);
2274 memset (&ai_hints, 0, sizeof (ai_hints));
2275 ai_hints.ai_flags = 0;
2276 #ifdef AI_PASSIVE
2277 ai_hints.ai_flags |= AI_PASSIVE;
2278 #endif
2279 #ifdef AI_ADDRCONFIG
2280 ai_hints.ai_flags |= AI_ADDRCONFIG;
2281 #endif
2282 ai_hints.ai_family = AF_UNSPEC;
2283 ai_hints.ai_socktype = SOCK_DGRAM;
2284 ai_hints.ai_protocol = IPPROTO_UDP;
2286 status = getaddrinfo (node, service, &ai_hints, &ai_list);
2287 if (status != 0)
2288 {
2289 ERROR ("network plugin: getaddrinfo (%s, %s) failed: %s",
2290 (se->node == NULL) ? "(null)" : se->node,
2291 (se->service == NULL) ? "(null)" : se->service,
2292 gai_strerror (status));
2293 return (-1);
2294 }
2296 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2297 {
2298 int *tmp;
2300 tmp = realloc (se->data.server.fd,
2301 sizeof (*tmp) * (se->data.server.fd_num + 1));
2302 if (tmp == NULL)
2303 {
2304 ERROR ("network plugin: realloc failed.");
2305 continue;
2306 }
2307 se->data.server.fd = tmp;
2308 tmp = se->data.server.fd + se->data.server.fd_num;
2310 *tmp = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
2311 ai_ptr->ai_protocol);
2312 if (*tmp < 0)
2313 {
2314 char errbuf[1024];
2315 ERROR ("network plugin: socket(2) failed: %s",
2316 sstrerror (errno, errbuf,
2317 sizeof (errbuf)));
2318 continue;
2319 }
2321 status = network_bind_socket (*tmp, ai_ptr, se->interface);
2322 if (status != 0)
2323 {
2324 close (*tmp);
2325 *tmp = -1;
2326 continue;
2327 }
2329 se->data.server.fd_num++;
2330 continue;
2331 } /* for (ai_list) */
2333 freeaddrinfo (ai_list);
2335 if (se->data.server.fd_num <= 0)
2336 return (-1);
2337 return (0);
2338 } /* }}} int sockent_server_listen */
2340 /* Add a sockent to the global list of sockets */
2341 static int sockent_add (sockent_t *se) /* {{{ */
2342 {
2343 sockent_t *last_ptr;
2345 if (se == NULL)
2346 return (-1);
2348 if (se->type == SOCKENT_TYPE_SERVER)
2349 {
2350 struct pollfd *tmp;
2351 size_t i;
2353 tmp = realloc (listen_sockets_pollfd,
2354 sizeof (*tmp) * (listen_sockets_num
2355 + se->data.server.fd_num));
2356 if (tmp == NULL)
2357 {
2358 ERROR ("network plugin: realloc failed.");
2359 return (-1);
2360 }
2361 listen_sockets_pollfd = tmp;
2362 tmp = listen_sockets_pollfd + listen_sockets_num;
2364 for (i = 0; i < se->data.server.fd_num; i++)
2365 {
2366 memset (tmp + i, 0, sizeof (*tmp));
2367 tmp[i].fd = se->data.server.fd[i];
2368 tmp[i].events = POLLIN | POLLPRI;
2369 tmp[i].revents = 0;
2370 }
2372 listen_sockets_num += se->data.server.fd_num;
2374 if (listen_sockets == NULL)
2375 {
2376 listen_sockets = se;
2377 return (0);
2378 }
2379 last_ptr = listen_sockets;
2380 }
2381 else /* if (se->type == SOCKENT_TYPE_CLIENT) */
2382 {
2383 if (sending_sockets == NULL)
2384 {
2385 sending_sockets = se;
2386 return (0);
2387 }
2388 last_ptr = sending_sockets;
2389 }
2391 while (last_ptr->next != NULL)
2392 last_ptr = last_ptr->next;
2393 last_ptr->next = se;
2395 return (0);
2396 } /* }}} int sockent_add */
2398 static void *dispatch_thread (void __attribute__((unused)) *arg) /* {{{ */
2399 {
2400 while (42)
2401 {
2402 receive_list_entry_t *ent;
2403 sockent_t *se;
2405 /* Lock and wait for more data to come in */
2406 pthread_mutex_lock (&receive_list_lock);
2407 while ((listen_loop == 0)
2408 && (receive_list_head == NULL))
2409 pthread_cond_wait (&receive_list_cond, &receive_list_lock);
2411 /* Remove the head entry and unlock */
2412 ent = receive_list_head;
2413 if (ent != NULL)
2414 receive_list_head = ent->next;
2415 receive_list_length--;
2416 pthread_mutex_unlock (&receive_list_lock);
2418 /* Check whether we are supposed to exit. We do NOT check `listen_loop'
2419 * because we dispatch all missing packets before shutting down. */
2420 if (ent == NULL)
2421 break;
2423 /* Look for the correct `sockent_t' */
2424 se = listen_sockets;
2425 while (se != NULL)
2426 {
2427 size_t i;
2429 for (i = 0; i < se->data.server.fd_num; i++)
2430 if (se->data.server.fd[i] == ent->fd)
2431 break;
2433 if (i < se->data.server.fd_num)
2434 break;
2436 se = se->next;
2437 }
2439 if (se == NULL)
2440 {
2441 ERROR ("network plugin: Got packet from FD %i, but can't "
2442 "find an appropriate socket entry.",
2443 ent->fd);
2444 sfree (ent->data);
2445 sfree (ent);
2446 continue;
2447 }
2449 parse_packet (se, ent->data, ent->data_len, /* flags = */ 0,
2450 /* username = */ NULL);
2451 sfree (ent->data);
2452 sfree (ent);
2453 } /* while (42) */
2455 return (NULL);
2456 } /* }}} void *dispatch_thread */
2458 static int network_receive (void) /* {{{ */
2459 {
2460 char buffer[network_config_packet_size];
2461 int buffer_len;
2463 int i;
2464 int status = 0;
2466 receive_list_entry_t *private_list_head;
2467 receive_list_entry_t *private_list_tail;
2468 uint64_t private_list_length;
2470 assert (listen_sockets_num > 0);
2472 private_list_head = NULL;
2473 private_list_tail = NULL;
2474 private_list_length = 0;
2476 while (listen_loop == 0)
2477 {
2478 status = poll (listen_sockets_pollfd, listen_sockets_num, -1);
2479 if (status <= 0)
2480 {
2481 char errbuf[1024];
2482 if (errno == EINTR)
2483 continue;
2484 ERROR ("network plugin: poll(2) failed: %s",
2485 sstrerror (errno, errbuf, sizeof (errbuf)));
2486 break;
2487 }
2489 for (i = 0; (i < listen_sockets_num) && (status > 0); i++)
2490 {
2491 receive_list_entry_t *ent;
2493 if ((listen_sockets_pollfd[i].revents
2494 & (POLLIN | POLLPRI)) == 0)
2495 continue;
2496 status--;
2498 buffer_len = recv (listen_sockets_pollfd[i].fd,
2499 buffer, sizeof (buffer),
2500 0 /* no flags */);
2501 if (buffer_len < 0)
2502 {
2503 char errbuf[1024];
2504 status = (errno != 0) ? errno : -1;
2505 ERROR ("network plugin: recv(2) failed: %s",
2506 sstrerror (errno, errbuf, sizeof (errbuf)));
2507 break;
2508 }
2510 stats_octets_rx += ((uint64_t) buffer_len);
2511 stats_packets_rx++;
2513 /* TODO: Possible performance enhancement: Do not free
2514 * these entries in the dispatch thread but put them in
2515 * another list, so we don't have to allocate more and
2516 * more of these structures. */
2517 ent = malloc (sizeof (receive_list_entry_t));
2518 if (ent == NULL)
2519 {
2520 ERROR ("network plugin: malloc failed.");
2521 status = ENOMEM;
2522 break;
2523 }
2524 memset (ent, 0, sizeof (receive_list_entry_t));
2525 ent->data = malloc (network_config_packet_size);
2526 if (ent->data == NULL)
2527 {
2528 sfree (ent);
2529 ERROR ("network plugin: malloc failed.");
2530 status = ENOMEM;
2531 break;
2532 }
2533 ent->fd = listen_sockets_pollfd[i].fd;
2534 ent->next = NULL;
2536 memcpy (ent->data, buffer, buffer_len);
2537 ent->data_len = buffer_len;
2539 if (private_list_head == NULL)
2540 private_list_head = ent;
2541 else
2542 private_list_tail->next = ent;
2543 private_list_tail = ent;
2544 private_list_length++;
2546 /* Do not block here. Blocking here has led to
2547 * insufficient performance in the past. */
2548 if (pthread_mutex_trylock (&receive_list_lock) == 0)
2549 {
2550 assert (((receive_list_head == NULL) && (receive_list_length == 0))
2551 || ((receive_list_head != NULL) && (receive_list_length != 0)));
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 pthread_cond_signal (&receive_list_cond);
2561 pthread_mutex_unlock (&receive_list_lock);
2563 private_list_head = NULL;
2564 private_list_tail = NULL;
2565 private_list_length = 0;
2566 }
2568 status = 0;
2569 } /* for (listen_sockets_pollfd) */
2571 if (status != 0)
2572 break;
2573 } /* while (listen_loop == 0) */
2575 /* Make sure everything is dispatched before exiting. */
2576 if (private_list_head != NULL)
2577 {
2578 pthread_mutex_lock (&receive_list_lock);
2580 if (receive_list_head == NULL)
2581 receive_list_head = private_list_head;
2582 else
2583 receive_list_tail->next = private_list_head;
2584 receive_list_tail = private_list_tail;
2585 receive_list_length += private_list_length;
2587 pthread_cond_signal (&receive_list_cond);
2588 pthread_mutex_unlock (&receive_list_lock);
2589 }
2591 return (status);
2592 } /* }}} int network_receive */
2594 static void *receive_thread (void __attribute__((unused)) *arg)
2595 {
2596 return (network_receive () ? (void *) 1 : (void *) 0);
2597 } /* void *receive_thread */
2599 static void network_init_buffer (void)
2600 {
2601 memset (send_buffer, 0, network_config_packet_size);
2602 send_buffer_ptr = send_buffer;
2603 send_buffer_fill = 0;
2605 memset (&send_buffer_vl, 0, sizeof (send_buffer_vl));
2606 } /* int network_init_buffer */
2608 static void networt_send_buffer_plain (sockent_t *se, /* {{{ */
2609 const char *buffer, size_t buffer_size)
2610 {
2611 int status;
2613 while (42)
2614 {
2615 status = sockent_client_connect (se);
2616 if (status != 0)
2617 return;
2619 status = sendto (se->data.client.fd, buffer, buffer_size,
2620 /* flags = */ 0,
2621 (struct sockaddr *) se->data.client.addr,
2622 se->data.client.addrlen);
2623 if (status < 0)
2624 {
2625 char errbuf[1024];
2627 if ((errno == EINTR) || (errno == EAGAIN))
2628 continue;
2630 ERROR ("network plugin: sendto failed: %s. Closing sending socket.",
2631 sstrerror (errno, errbuf, sizeof (errbuf)));
2632 sockent_client_disconnect (se);
2633 return;
2634 }
2636 break;
2637 } /* while (42) */
2638 } /* }}} void networt_send_buffer_plain */
2640 #if HAVE_LIBGCRYPT
2641 #define BUFFER_ADD(p,s) do { \
2642 memcpy (buffer + buffer_offset, (p), (s)); \
2643 buffer_offset += (s); \
2644 } while (0)
2646 static void networt_send_buffer_signed (sockent_t *se, /* {{{ */
2647 const char *in_buffer, size_t in_buffer_size)
2648 {
2649 part_signature_sha256_t ps;
2650 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2651 size_t buffer_offset;
2652 size_t username_len;
2654 gcry_md_hd_t hd;
2655 gcry_error_t err;
2656 unsigned char *hash;
2658 hd = NULL;
2659 err = gcry_md_open (&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
2660 if (err != 0)
2661 {
2662 ERROR ("network plugin: Creating HMAC object failed: %s",
2663 gcry_strerror (err));
2664 return;
2665 }
2667 err = gcry_md_setkey (hd, se->data.client.password,
2668 strlen (se->data.client.password));
2669 if (err != 0)
2670 {
2671 ERROR ("network plugin: gcry_md_setkey failed: %s",
2672 gcry_strerror (err));
2673 gcry_md_close (hd);
2674 return;
2675 }
2677 username_len = strlen (se->data.client.username);
2678 if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE))
2679 {
2680 ERROR ("network plugin: Username too long: %s",
2681 se->data.client.username);
2682 return;
2683 }
2685 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE,
2686 se->data.client.username, username_len);
2687 memcpy (buffer + PART_SIGNATURE_SHA256_SIZE + username_len,
2688 in_buffer, in_buffer_size);
2690 /* Initialize the `ps' structure. */
2691 memset (&ps, 0, sizeof (ps));
2692 ps.head.type = htons (TYPE_SIGN_SHA256);
2693 ps.head.length = htons (PART_SIGNATURE_SHA256_SIZE + username_len);
2695 /* Calculate the hash value. */
2696 gcry_md_write (hd, buffer + PART_SIGNATURE_SHA256_SIZE,
2697 username_len + in_buffer_size);
2698 hash = gcry_md_read (hd, GCRY_MD_SHA256);
2699 if (hash == NULL)
2700 {
2701 ERROR ("network plugin: gcry_md_read failed.");
2702 gcry_md_close (hd);
2703 return;
2704 }
2705 memcpy (ps.hash, hash, sizeof (ps.hash));
2707 /* Add the header */
2708 buffer_offset = 0;
2710 BUFFER_ADD (&ps.head.type, sizeof (ps.head.type));
2711 BUFFER_ADD (&ps.head.length, sizeof (ps.head.length));
2712 BUFFER_ADD (ps.hash, sizeof (ps.hash));
2714 assert (buffer_offset == PART_SIGNATURE_SHA256_SIZE);
2716 gcry_md_close (hd);
2717 hd = NULL;
2719 buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
2720 networt_send_buffer_plain (se, buffer, buffer_offset);
2721 } /* }}} void networt_send_buffer_signed */
2723 static void networt_send_buffer_encrypted (sockent_t *se, /* {{{ */
2724 const char *in_buffer, size_t in_buffer_size)
2725 {
2726 part_encryption_aes256_t pea;
2727 char buffer[BUFF_SIG_SIZE + in_buffer_size];
2728 size_t buffer_size;
2729 size_t buffer_offset;
2730 size_t header_size;
2731 size_t username_len;
2732 gcry_error_t err;
2733 gcry_cipher_hd_t cypher;
2735 /* Initialize the header fields */
2736 memset (&pea, 0, sizeof (pea));
2737 pea.head.type = htons (TYPE_ENCR_AES256);
2739 pea.username = se->data.client.username;
2741 username_len = strlen (pea.username);
2742 if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE)
2743 {
2744 ERROR ("network plugin: Username too long: %s", pea.username);
2745 return;
2746 }
2748 buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
2749 header_size = PART_ENCRYPTION_AES256_SIZE + username_len
2750 - sizeof (pea.hash);
2752 assert (buffer_size <= sizeof (buffer));
2753 DEBUG ("network plugin: networt_send_buffer_encrypted: "
2754 "buffer_size = %zu;", buffer_size);
2756 pea.head.length = htons ((uint16_t) (PART_ENCRYPTION_AES256_SIZE
2757 + username_len + in_buffer_size));
2758 pea.username_length = htons ((uint16_t) username_len);
2760 /* Chose a random initialization vector. */
2761 gcry_randomize ((void *) &pea.iv, sizeof (pea.iv), GCRY_STRONG_RANDOM);
2763 /* Create hash of the payload */
2764 gcry_md_hash_buffer (GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
2766 /* Initialize the buffer */
2767 buffer_offset = 0;
2768 memset (buffer, 0, sizeof (buffer));
2771 BUFFER_ADD (&pea.head.type, sizeof (pea.head.type));
2772 BUFFER_ADD (&pea.head.length, sizeof (pea.head.length));
2773 BUFFER_ADD (&pea.username_length, sizeof (pea.username_length));
2774 BUFFER_ADD (pea.username, username_len);
2775 BUFFER_ADD (pea.iv, sizeof (pea.iv));
2776 assert (buffer_offset == header_size);
2777 BUFFER_ADD (pea.hash, sizeof (pea.hash));
2778 BUFFER_ADD (in_buffer, in_buffer_size);
2780 assert (buffer_offset == buffer_size);
2782 cypher = network_get_aes256_cypher (se, pea.iv, sizeof (pea.iv),
2783 se->data.client.password);
2784 if (cypher == NULL)
2785 return;
2787 /* Encrypt the buffer in-place */
2788 err = gcry_cipher_encrypt (cypher,
2789 buffer + header_size,
2790 buffer_size - header_size,
2791 /* in = */ NULL, /* in len = */ 0);
2792 if (err != 0)
2793 {
2794 ERROR ("network plugin: gcry_cipher_encrypt returned: %s",
2795 gcry_strerror (err));
2796 return;
2797 }
2799 /* Send it out without further modifications */
2800 networt_send_buffer_plain (se, buffer, buffer_size);
2801 } /* }}} void networt_send_buffer_encrypted */
2802 #undef BUFFER_ADD
2803 #endif /* HAVE_LIBGCRYPT */
2805 static void network_send_buffer (char *buffer, size_t buffer_len) /* {{{ */
2806 {
2807 sockent_t *se;
2809 DEBUG ("network plugin: network_send_buffer: buffer_len = %zu", buffer_len);
2811 for (se = sending_sockets; se != NULL; se = se->next)
2812 {
2813 #if HAVE_LIBGCRYPT
2814 if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
2815 networt_send_buffer_encrypted (se, buffer, buffer_len);
2816 else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
2817 networt_send_buffer_signed (se, buffer, buffer_len);
2818 else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
2819 #endif /* HAVE_LIBGCRYPT */
2820 networt_send_buffer_plain (se, buffer, buffer_len);
2821 } /* for (sending_sockets) */
2822 } /* }}} void network_send_buffer */
2824 static int add_to_buffer (char *buffer, int buffer_size, /* {{{ */
2825 value_list_t *vl_def,
2826 const data_set_t *ds, const value_list_t *vl)
2827 {
2828 char *buffer_orig = buffer;
2830 if (strcmp (vl_def->host, vl->host) != 0)
2831 {
2832 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
2833 vl->host, strlen (vl->host)) != 0)
2834 return (-1);
2835 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
2836 }
2838 if (vl_def->time != vl->time)
2839 {
2840 if (write_part_number (&buffer, &buffer_size, TYPE_TIME_HR,
2841 (uint64_t) vl->time))
2842 return (-1);
2843 vl_def->time = vl->time;
2844 }
2846 if (vl_def->interval != vl->interval)
2847 {
2848 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL_HR,
2849 (uint64_t) vl->interval))
2850 return (-1);
2851 vl_def->interval = vl->interval;
2852 }
2854 if (strcmp (vl_def->plugin, vl->plugin) != 0)
2855 {
2856 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
2857 vl->plugin, strlen (vl->plugin)) != 0)
2858 return (-1);
2859 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
2860 }
2862 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
2863 {
2864 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
2865 vl->plugin_instance,
2866 strlen (vl->plugin_instance)) != 0)
2867 return (-1);
2868 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
2869 }
2871 if (strcmp (vl_def->type, vl->type) != 0)
2872 {
2873 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
2874 vl->type, strlen (vl->type)) != 0)
2875 return (-1);
2876 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
2877 }
2879 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
2880 {
2881 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
2882 vl->type_instance,
2883 strlen (vl->type_instance)) != 0)
2884 return (-1);
2885 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
2886 }
2888 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
2889 return (-1);
2891 return (buffer - buffer_orig);
2892 } /* }}} int add_to_buffer */
2894 static void flush_buffer (void)
2895 {
2896 DEBUG ("network plugin: flush_buffer: send_buffer_fill = %i",
2897 send_buffer_fill);
2899 network_send_buffer (send_buffer, (size_t) send_buffer_fill);
2901 stats_octets_tx += ((uint64_t) send_buffer_fill);
2902 stats_packets_tx++;
2904 network_init_buffer ();
2905 }
2907 static int network_write (const data_set_t *ds, const value_list_t *vl,
2908 user_data_t __attribute__((unused)) *user_data)
2909 {
2910 int status;
2912 if (!check_send_okay (vl))
2913 {
2914 #if COLLECT_DEBUG
2915 char name[6*DATA_MAX_NAME_LEN];
2916 FORMAT_VL (name, sizeof (name), vl);
2917 name[sizeof (name) - 1] = 0;
2918 DEBUG ("network plugin: network_write: "
2919 "NOT sending %s.", name);
2920 #endif
2921 /* Counter is not protected by another lock and may be reached by
2922 * multiple threads */
2923 pthread_mutex_lock (&stats_lock);
2924 stats_values_not_sent++;
2925 pthread_mutex_unlock (&stats_lock);
2926 return (0);
2927 }
2929 uc_meta_data_add_unsigned_int (vl,
2930 "network:time_sent", (uint64_t) vl->time);
2932 pthread_mutex_lock (&send_buffer_lock);
2934 status = add_to_buffer (send_buffer_ptr,
2935 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2936 &send_buffer_vl,
2937 ds, vl);
2938 if (status >= 0)
2939 {
2940 /* status == bytes added to the buffer */
2941 send_buffer_fill += status;
2942 send_buffer_ptr += status;
2944 stats_values_sent++;
2945 }
2946 else
2947 {
2948 flush_buffer ();
2950 status = add_to_buffer (send_buffer_ptr,
2951 network_config_packet_size - (send_buffer_fill + BUFF_SIG_SIZE),
2952 &send_buffer_vl,
2953 ds, vl);
2955 if (status >= 0)
2956 {
2957 send_buffer_fill += status;
2958 send_buffer_ptr += status;
2960 stats_values_sent++;
2961 }
2962 }
2964 if (status < 0)
2965 {
2966 ERROR ("network plugin: Unable to append to the "
2967 "buffer for some weird reason");
2968 }
2969 else if ((network_config_packet_size - send_buffer_fill) < 15)
2970 {
2971 flush_buffer ();
2972 }
2974 pthread_mutex_unlock (&send_buffer_lock);
2976 return ((status < 0) ? -1 : 0);
2977 } /* int network_write */
2979 static int network_config_set_boolean (const oconfig_item_t *ci, /* {{{ */
2980 int *retval)
2981 {
2982 if ((ci->values_num != 1)
2983 || ((ci->values[0].type != OCONFIG_TYPE_BOOLEAN)
2984 && (ci->values[0].type != OCONFIG_TYPE_STRING)))
2985 {
2986 ERROR ("network plugin: The `%s' config option needs "
2987 "exactly one boolean argument.", ci->key);
2988 return (-1);
2989 }
2991 if (ci->values[0].type == OCONFIG_TYPE_BOOLEAN)
2992 {
2993 if (ci->values[0].value.boolean)
2994 *retval = 1;
2995 else
2996 *retval = 0;
2997 }
2998 else
2999 {
3000 char *str = ci->values[0].value.string;
3002 if (IS_TRUE (str))
3003 *retval = 1;
3004 else if (IS_FALSE (str))
3005 *retval = 0;
3006 else
3007 {
3008 ERROR ("network plugin: Cannot parse string value `%s' of the `%s' "
3009 "option as boolean value.",
3010 str, ci->key);
3011 return (-1);
3012 }
3013 }
3015 return (0);
3016 } /* }}} int network_config_set_boolean */
3018 static int network_config_set_ttl (const oconfig_item_t *ci) /* {{{ */
3019 {
3020 int tmp;
3021 if ((ci->values_num != 1)
3022 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
3023 {
3024 WARNING ("network plugin: The `TimeToLive' config option needs exactly "
3025 "one numeric argument.");
3026 return (-1);
3027 }
3029 tmp = (int) ci->values[0].value.number;
3030 if ((tmp > 0) && (tmp <= 255))
3031 network_config_ttl = tmp;
3032 else {
3033 WARNING ("network plugin: The `TimeToLive' must be between 1 and 255.");
3034 return (-1);
3035 }
3037 return (0);
3038 } /* }}} int network_config_set_ttl */
3040 static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
3041 int *interface)
3042 {
3043 if ((ci->values_num != 1)
3044 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3045 {
3046 WARNING ("network plugin: The `Interface' config option needs exactly "
3047 "one string argument.");
3048 return (-1);
3049 }
3051 if (interface == NULL)
3052 return (-1);
3054 *interface = if_nametoindex (ci->values[0].value.string);
3056 return (0);
3057 } /* }}} int network_config_set_interface */
3059 static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
3060 {
3061 int tmp;
3062 if ((ci->values_num != 1)
3063 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
3064 {
3065 WARNING ("network plugin: The `MaxPacketSize' config option needs exactly "
3066 "one numeric argument.");
3067 return (-1);
3068 }
3070 tmp = (int) ci->values[0].value.number;
3071 if ((tmp >= 1024) && (tmp <= 65535))
3072 network_config_packet_size = tmp;
3074 return (0);
3075 } /* }}} int network_config_set_buffer_size */
3077 #if HAVE_LIBGCRYPT
3078 static int network_config_set_string (const oconfig_item_t *ci, /* {{{ */
3079 char **ret_string)
3080 {
3081 char *tmp;
3082 if ((ci->values_num != 1)
3083 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3084 {
3085 WARNING ("network plugin: The `%s' config option needs exactly "
3086 "one string argument.", ci->key);
3087 return (-1);
3088 }
3090 tmp = strdup (ci->values[0].value.string);
3091 if (tmp == NULL)
3092 return (-1);
3094 sfree (*ret_string);
3095 *ret_string = tmp;
3097 return (0);
3098 } /* }}} int network_config_set_string */
3099 #endif /* HAVE_LIBGCRYPT */
3101 #if HAVE_LIBGCRYPT
3102 static int network_config_set_security_level (oconfig_item_t *ci, /* {{{ */
3103 int *retval)
3104 {
3105 char *str;
3106 if ((ci->values_num != 1)
3107 || (ci->values[0].type != OCONFIG_TYPE_STRING))
3108 {
3109 WARNING ("network plugin: The `SecurityLevel' config option needs exactly "
3110 "one string argument.");
3111 return (-1);
3112 }
3114 str = ci->values[0].value.string;
3115 if (strcasecmp ("Encrypt", str) == 0)
3116 *retval = SECURITY_LEVEL_ENCRYPT;
3117 else if (strcasecmp ("Sign", str) == 0)
3118 *retval = SECURITY_LEVEL_SIGN;
3119 else if (strcasecmp ("None", str) == 0)
3120 *retval = SECURITY_LEVEL_NONE;
3121 else
3122 {
3123 WARNING ("network plugin: Unknown security level: %s.", str);
3124 return (-1);
3125 }
3127 return (0);
3128 } /* }}} int network_config_set_security_level */
3129 #endif /* HAVE_LIBGCRYPT */
3131 static int network_config_add_listen (const oconfig_item_t *ci) /* {{{ */
3132 {
3133 sockent_t *se;
3134 int status;
3135 int i;
3137 if ((ci->values_num < 1) || (ci->values_num > 2)
3138 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3139 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3140 {
3141 ERROR ("network plugin: The `%s' config option needs "
3142 "one or two string arguments.", ci->key);
3143 return (-1);
3144 }
3146 se = sockent_create (SOCKENT_TYPE_SERVER);
3147 if (se == NULL)
3148 {
3149 ERROR ("network plugin: sockent_create failed.");
3150 return (-1);
3151 }
3153 se->node = strdup (ci->values[0].value.string);
3154 if (ci->values_num >= 2)
3155 se->service = strdup (ci->values[1].value.string);
3157 for (i = 0; i < ci->children_num; i++)
3158 {
3159 oconfig_item_t *child = ci->children + i;
3161 #if HAVE_LIBGCRYPT
3162 if (strcasecmp ("AuthFile", child->key) == 0)
3163 network_config_set_string (child, &se->data.server.auth_file);
3164 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3165 network_config_set_security_level (child,
3166 &se->data.server.security_level);
3167 else
3168 #endif /* HAVE_LIBGCRYPT */
3169 if (strcasecmp ("Interface", child->key) == 0)
3170 network_config_set_interface (child,
3171 &se->interface);
3172 else
3173 {
3174 WARNING ("network plugin: Option `%s' is not allowed here.",
3175 child->key);
3176 }
3177 }
3179 #if HAVE_LIBGCRYPT
3180 if ((se->data.server.security_level > SECURITY_LEVEL_NONE)
3181 && (se->data.server.auth_file == NULL))
3182 {
3183 ERROR ("network plugin: A security level higher than `none' was "
3184 "requested, but no AuthFile option was given. Cowardly refusing to "
3185 "open this socket!");
3186 sockent_destroy (se);
3187 return (-1);
3188 }
3189 #endif /* HAVE_LIBGCRYPT */
3191 status = sockent_init_crypto (se);
3192 if (status != 0)
3193 {
3194 ERROR ("network plugin: network_config_add_listen: sockent_init_crypto() failed.");
3195 sockent_destroy (se);
3196 return (-1);
3197 }
3199 status = sockent_server_listen (se);
3200 if (status != 0)
3201 {
3202 ERROR ("network plugin: network_config_add_server: sockent_server_listen failed.");
3203 sockent_destroy (se);
3204 return (-1);
3205 }
3207 status = sockent_add (se);
3208 if (status != 0)
3209 {
3210 ERROR ("network plugin: network_config_add_listen: sockent_add failed.");
3211 sockent_destroy (se);
3212 return (-1);
3213 }
3215 return (0);
3216 } /* }}} int network_config_add_listen */
3218 static int network_config_add_server (const oconfig_item_t *ci) /* {{{ */
3219 {
3220 sockent_t *se;
3221 int status;
3222 int i;
3224 if ((ci->values_num < 1) || (ci->values_num > 2)
3225 || (ci->values[0].type != OCONFIG_TYPE_STRING)
3226 || ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING)))
3227 {
3228 ERROR ("network plugin: The `%s' config option needs "
3229 "one or two string arguments.", ci->key);
3230 return (-1);
3231 }
3233 se = sockent_create (SOCKENT_TYPE_CLIENT);
3234 if (se == NULL)
3235 {
3236 ERROR ("network plugin: sockent_create failed.");
3237 return (-1);
3238 }
3240 se->node = strdup (ci->values[0].value.string);
3241 if (ci->values_num >= 2)
3242 se->service = strdup (ci->values[1].value.string);
3244 for (i = 0; i < ci->children_num; i++)
3245 {
3246 oconfig_item_t *child = ci->children + i;
3248 #if HAVE_LIBGCRYPT
3249 if (strcasecmp ("Username", child->key) == 0)
3250 network_config_set_string (child, &se->data.client.username);
3251 else if (strcasecmp ("Password", child->key) == 0)
3252 network_config_set_string (child, &se->data.client.password);
3253 else if (strcasecmp ("SecurityLevel", child->key) == 0)
3254 network_config_set_security_level (child,
3255 &se->data.client.security_level);
3256 else
3257 #endif /* HAVE_LIBGCRYPT */
3258 if (strcasecmp ("Interface", child->key) == 0)
3259 network_config_set_interface (child,
3260 &se->interface);
3261 else if (strcasecmp ("ResolveInterval", child->key) == 0)
3262 cf_util_get_cdtime(child, &se->data.client.resolve_interval);
3263 else
3264 {
3265 WARNING ("network plugin: Option `%s' is not allowed here.",
3266 child->key);
3267 }
3268 }
3270 #if HAVE_LIBGCRYPT
3271 if ((se->data.client.security_level > SECURITY_LEVEL_NONE)
3272 && ((se->data.client.username == NULL)
3273 || (se->data.client.password == NULL)))
3274 {
3275 ERROR ("network plugin: A security level higher than `none' was "
3276 "requested, but no Username or Password option was given. "
3277 "Cowardly refusing to open this socket!");
3278 sockent_destroy (se);
3279 return (-1);
3280 }
3281 #endif /* HAVE_LIBGCRYPT */
3283 status = sockent_init_crypto (se);
3284 if (status != 0)
3285 {
3286 ERROR ("network plugin: network_config_add_server: sockent_init_crypto() failed.");
3287 sockent_destroy (se);
3288 return (-1);
3289 }
3291 /* No call to sockent_client_connect() here -- it is called from
3292 * networt_send_buffer_plain(). */
3294 status = sockent_add (se);
3295 if (status != 0)
3296 {
3297 ERROR ("network plugin: network_config_add_server: sockent_add failed.");
3298 sockent_destroy (se);
3299 return (-1);
3300 }
3302 return (0);
3303 } /* }}} int network_config_add_server */
3305 static int network_config (oconfig_item_t *ci) /* {{{ */
3306 {
3307 int i;
3309 /* The options need to be applied first */
3310 for (i = 0; i < ci->children_num; i++)
3311 {
3312 oconfig_item_t *child = ci->children + i;
3313 if (strcasecmp ("TimeToLive", child->key) == 0)
3314 network_config_set_ttl (child);
3315 }
3317 for (i = 0; i < ci->children_num; i++)
3318 {
3319 oconfig_item_t *child = ci->children + i;
3321 if (strcasecmp ("Listen", child->key) == 0)
3322 network_config_add_listen (child);
3323 else if (strcasecmp ("Server", child->key) == 0)
3324 network_config_add_server (child);
3325 else if (strcasecmp ("TimeToLive", child->key) == 0) {
3326 /* Handled earlier */
3327 }
3328 else if (strcasecmp ("MaxPacketSize", child->key) == 0)
3329 network_config_set_buffer_size (child);
3330 else if (strcasecmp ("Forward", child->key) == 0)
3331 network_config_set_boolean (child, &network_config_forward);
3332 else if (strcasecmp ("ReportStats", child->key) == 0)
3333 network_config_set_boolean (child, &network_config_stats);
3334 else
3335 {
3336 WARNING ("network plugin: Option `%s' is not allowed here.",
3337 child->key);
3338 }
3339 }
3341 return (0);
3342 } /* }}} int network_config */
3344 static int network_notification (const notification_t *n,
3345 user_data_t __attribute__((unused)) *user_data)
3346 {
3347 char buffer[network_config_packet_size];
3348 char *buffer_ptr = buffer;
3349 int buffer_free = sizeof (buffer);
3350 int status;
3352 if (!check_send_notify_okay (n))
3353 return (0);
3355 memset (buffer, 0, sizeof (buffer));
3357 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_TIME_HR,
3358 (uint64_t) n->time);
3359 if (status != 0)
3360 return (-1);
3362 status = write_part_number (&buffer_ptr, &buffer_free, TYPE_SEVERITY,
3363 (uint64_t) n->severity);
3364 if (status != 0)
3365 return (-1);
3367 if (strlen (n->host) > 0)
3368 {
3369 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_HOST,
3370 n->host, strlen (n->host));
3371 if (status != 0)
3372 return (-1);
3373 }
3375 if (strlen (n->plugin) > 0)
3376 {
3377 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_PLUGIN,
3378 n->plugin, strlen (n->plugin));
3379 if (status != 0)
3380 return (-1);
3381 }
3383 if (strlen (n->plugin_instance) > 0)
3384 {
3385 status = write_part_string (&buffer_ptr, &buffer_free,
3386 TYPE_PLUGIN_INSTANCE,
3387 n->plugin_instance, strlen (n->plugin_instance));
3388 if (status != 0)
3389 return (-1);
3390 }
3392 if (strlen (n->type) > 0)
3393 {
3394 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE,
3395 n->type, strlen (n->type));
3396 if (status != 0)
3397 return (-1);
3398 }
3400 if (strlen (n->type_instance) > 0)
3401 {
3402 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
3403 n->type_instance, strlen (n->type_instance));
3404 if (status != 0)
3405 return (-1);
3406 }
3408 status = write_part_string (&buffer_ptr, &buffer_free, TYPE_MESSAGE,
3409 n->message, strlen (n->message));
3410 if (status != 0)
3411 return (-1);
3413 network_send_buffer (buffer, sizeof (buffer) - buffer_free);
3415 return (0);
3416 } /* int network_notification */
3418 static int network_shutdown (void)
3419 {
3420 sockent_t *se;
3422 listen_loop++;
3424 /* Kill the listening thread */
3425 if (receive_thread_running != 0)
3426 {
3427 INFO ("network plugin: Stopping receive thread.");
3428 pthread_kill (receive_thread_id, SIGTERM);
3429 pthread_join (receive_thread_id, NULL /* no return value */);
3430 memset (&receive_thread_id, 0, sizeof (receive_thread_id));
3431 receive_thread_running = 0;
3432 }
3434 /* Shutdown the dispatching thread */
3435 if (dispatch_thread_running != 0)
3436 {
3437 INFO ("network plugin: Stopping dispatch thread.");
3438 pthread_mutex_lock (&receive_list_lock);
3439 pthread_cond_broadcast (&receive_list_cond);
3440 pthread_mutex_unlock (&receive_list_lock);
3441 pthread_join (dispatch_thread_id, /* ret = */ NULL);
3442 dispatch_thread_running = 0;
3443 }
3445 sockent_destroy (listen_sockets);
3447 if (send_buffer_fill > 0)
3448 flush_buffer ();
3450 sfree (send_buffer);
3452 for (se = sending_sockets; se != NULL; se = se->next)
3453 sockent_client_disconnect (se);
3454 sockent_destroy (sending_sockets);
3456 plugin_unregister_config ("network");
3457 plugin_unregister_init ("network");
3458 plugin_unregister_write ("network");
3459 plugin_unregister_shutdown ("network");
3461 return (0);
3462 } /* int network_shutdown */
3464 static int network_stats_read (void) /* {{{ */
3465 {
3466 derive_t copy_octets_rx;
3467 derive_t copy_octets_tx;
3468 derive_t copy_packets_rx;
3469 derive_t copy_packets_tx;
3470 derive_t copy_values_dispatched;
3471 derive_t copy_values_not_dispatched;
3472 derive_t copy_values_sent;
3473 derive_t copy_values_not_sent;
3474 derive_t copy_receive_list_length;
3475 value_list_t vl = VALUE_LIST_INIT;
3476 value_t values[2];
3478 copy_octets_rx = stats_octets_rx;
3479 copy_octets_tx = stats_octets_tx;
3480 copy_packets_rx = stats_packets_rx;
3481 copy_packets_tx = stats_packets_tx;
3482 copy_values_dispatched = stats_values_dispatched;
3483 copy_values_not_dispatched = stats_values_not_dispatched;
3484 copy_values_sent = stats_values_sent;
3485 copy_values_not_sent = stats_values_not_sent;
3486 copy_receive_list_length = receive_list_length;
3488 /* Initialize `vl' */
3489 vl.values = values;
3490 vl.values_len = 2;
3491 vl.time = 0;
3492 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
3493 sstrncpy (vl.plugin, "network", sizeof (vl.plugin));
3495 /* Octets received / sent */
3496 vl.values[0].derive = (derive_t) copy_octets_rx;
3497 vl.values[1].derive = (derive_t) copy_octets_tx;
3498 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
3499 plugin_dispatch_values (&vl);
3501 /* Packets received / send */
3502 vl.values[0].derive = (derive_t) copy_packets_rx;
3503 vl.values[1].derive = (derive_t) copy_packets_tx;
3504 sstrncpy (vl.type, "if_packets", sizeof (vl.type));
3505 plugin_dispatch_values (&vl);
3507 /* Values (not) dispatched and (not) send */
3508 sstrncpy (vl.type, "total_values", sizeof (vl.type));
3509 vl.values_len = 1;
3511 vl.values[0].derive = (derive_t) copy_values_dispatched;
3512 sstrncpy (vl.type_instance, "dispatch-accepted",
3513 sizeof (vl.type_instance));
3514 plugin_dispatch_values (&vl);
3516 vl.values[0].derive = (derive_t) copy_values_not_dispatched;
3517 sstrncpy (vl.type_instance, "dispatch-rejected",
3518 sizeof (vl.type_instance));
3519 plugin_dispatch_values (&vl);
3521 vl.values[0].derive = (derive_t) copy_values_sent;
3522 sstrncpy (vl.type_instance, "send-accepted",
3523 sizeof (vl.type_instance));
3524 plugin_dispatch_values (&vl);
3526 vl.values[0].derive = (derive_t) copy_values_not_sent;
3527 sstrncpy (vl.type_instance, "send-rejected",
3528 sizeof (vl.type_instance));
3529 plugin_dispatch_values (&vl);
3531 /* Receive queue length */
3532 vl.values[0].gauge = (gauge_t) copy_receive_list_length;
3533 sstrncpy (vl.type, "queue_length", sizeof (vl.type));
3534 vl.type_instance[0] = 0;
3535 plugin_dispatch_values (&vl);
3537 return (0);
3538 } /* }}} int network_stats_read */
3540 static int network_init (void)
3541 {
3542 static _Bool have_init = 0;
3544 /* Check if we were already initialized. If so, just return - there's
3545 * nothing more to do (for now, that is). */
3546 if (have_init)
3547 return (0);
3548 have_init = 1;
3550 #if HAVE_LIBGCRYPT
3551 network_init_gcrypt ();
3552 #endif
3554 if (network_config_stats != 0)
3555 plugin_register_read ("network", network_stats_read);
3557 plugin_register_shutdown ("network", network_shutdown);
3559 send_buffer = malloc (network_config_packet_size);
3560 if (send_buffer == NULL)
3561 {
3562 ERROR ("network plugin: malloc failed.");
3563 return (-1);
3564 }
3565 network_init_buffer ();
3567 /* setup socket(s) and so on */
3568 if (sending_sockets != NULL)
3569 {
3570 plugin_register_write ("network", network_write,
3571 /* user_data = */ NULL);
3572 plugin_register_notification ("network", network_notification,
3573 /* user_data = */ NULL);
3574 }
3576 /* If no threads need to be started, return here. */
3577 if ((listen_sockets_num == 0)
3578 || ((dispatch_thread_running != 0)
3579 && (receive_thread_running != 0)))
3580 return (0);
3582 if (dispatch_thread_running == 0)
3583 {
3584 int status;
3585 status = plugin_thread_create (&dispatch_thread_id,
3586 NULL /* no attributes */,
3587 dispatch_thread,
3588 NULL /* no argument */);
3589 if (status != 0)
3590 {
3591 char errbuf[1024];
3592 ERROR ("network: pthread_create failed: %s",
3593 sstrerror (errno, errbuf,
3594 sizeof (errbuf)));
3595 }
3596 else
3597 {
3598 dispatch_thread_running = 1;
3599 }
3600 }
3602 if (receive_thread_running == 0)
3603 {
3604 int status;
3605 status = plugin_thread_create (&receive_thread_id,
3606 NULL /* no attributes */,
3607 receive_thread,
3608 NULL /* no argument */);
3609 if (status != 0)
3610 {
3611 char errbuf[1024];
3612 ERROR ("network: pthread_create failed: %s",
3613 sstrerror (errno, errbuf,
3614 sizeof (errbuf)));
3615 }
3616 else
3617 {
3618 receive_thread_running = 1;
3619 }
3620 }
3622 return (0);
3623 } /* int network_init */
3625 /*
3626 * The flush option of the network plugin cannot flush individual identifiers.
3627 * All the values are added to a buffer and sent when the buffer is full, the
3628 * requested value may or may not be in there, it's not worth finding out. We
3629 * just send the buffer if `flush' is called - if the requested value was in
3630 * there, good. If not, well, then there is nothing to flush.. -octo
3631 */
3632 static int network_flush (__attribute__((unused)) cdtime_t timeout,
3633 __attribute__((unused)) const char *identifier,
3634 __attribute__((unused)) user_data_t *user_data)
3635 {
3636 pthread_mutex_lock (&send_buffer_lock);
3638 if (send_buffer_fill > 0)
3639 flush_buffer ();
3641 pthread_mutex_unlock (&send_buffer_lock);
3643 return (0);
3644 } /* int network_flush */
3646 void module_register (void)
3647 {
3648 plugin_register_complex_config ("network", network_config);
3649 plugin_register_init ("network", network_init);
3650 plugin_register_flush ("network", network_flush,
3651 /* user_data = */ NULL);
3652 } /* void module_register */
3654 /* vim: set fdm=marker : */