2 * collectd - src/zeromq.c
3 * Copyright (C) 2005-2009 Florian octo Forster
4 * Copyright (C) 2009 Aman Gupta
5 * Copyright (C) 2010 Julien Ammous
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; only version 2 of the License is applicable.
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 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 * Florian octo Forster <octo at verplant.org>
22 * Aman Gupta <aman at tmm1.net>
27 #include "common.h" /* auxiliary functions */
28 #include "plugin.h" /* plugin_register_*, plugin_dispatch_values */
32 // copy/paste from network.c ...
34 static value_list_t send_buffer_vl = VALUE_LIST_STATIC;
36 // we do not want to crypt here
39 static int network_dispatch_values (value_list_t *vl, /* {{{ */
45 || (strlen (vl->host) <= 0)
46 || (strlen (vl->plugin) <= 0)
47 || (strlen (vl->type) <= 0))
50 if (!check_receive_okay (vl))
53 char name[6*DATA_MAX_NAME_LEN];
54 FORMAT_VL (name, sizeof (name), vl);
55 name[sizeof (name) - 1] = 0;
56 DEBUG ("network plugin: network_dispatch_values: "
57 "NOT dispatching %s.", name);
59 stats_values_not_dispatched++;
63 assert (vl->meta == NULL);
65 vl->meta = meta_data_create ();
68 ERROR ("network plugin: meta_data_create failed.");
72 status = meta_data_add_boolean (vl->meta, "network:received", true);
75 ERROR ("network plugin: meta_data_add_boolean failed.");
76 meta_data_destroy (vl->meta);
83 status = meta_data_add_string (vl->meta, "network:username", username);
86 ERROR ("network plugin: meta_data_add_string failed.");
87 meta_data_destroy (vl->meta);
93 plugin_dispatch_values (vl);
94 stats_values_dispatched++;
96 meta_data_destroy (vl->meta);
100 } /* }}} int network_dispatch_values */
102 static int write_part_values (char **ret_buffer, int *ret_buffer_len, const data_set_t *ds, const value_list_t *vl)
108 part_header_t pkg_ph;
109 uint16_t pkg_num_values;
110 uint8_t *pkg_values_types;
116 num_values = vl->values_len;
117 packet_len = sizeof (part_header_t) + sizeof (uint16_t)
118 + (num_values * sizeof (uint8_t))
119 + (num_values * sizeof (value_t));
121 if (*ret_buffer_len < packet_len)
124 pkg_values_types = (uint8_t *) malloc (num_values * sizeof (uint8_t));
125 if (pkg_values_types == NULL)
127 ERROR ("network plugin: write_part_values: malloc failed.");
131 pkg_values = (value_t *) malloc (num_values * sizeof (value_t));
132 if (pkg_values == NULL)
134 free (pkg_values_types);
135 ERROR ("network plugin: write_part_values: malloc failed.");
139 pkg_ph.type = htons (TYPE_VALUES);
140 pkg_ph.length = htons (packet_len);
142 pkg_num_values = htons ((uint16_t) vl->values_len);
144 for (i = 0; i < num_values; i++)
146 pkg_values_types[i] = (uint8_t) ds->ds[i].type;
147 switch (ds->ds[i].type)
149 case DS_TYPE_COUNTER:
150 pkg_values[i].counter = htonll (vl->values[i].counter);
154 pkg_values[i].gauge = htond (vl->values[i].gauge);
158 pkg_values[i].derive = htonll (vl->values[i].derive);
161 case DS_TYPE_ABSOLUTE:
162 pkg_values[i].absolute = htonll (vl->values[i].absolute);
166 free (pkg_values_types);
168 ERROR ("network plugin: write_part_values: "
169 "Unknown data source type: %i",
172 } /* switch (ds->ds[i].type) */
173 } /* for (num_values) */
176 * Use `memcpy' to write everything to the buffer, because the pointer
177 * may be unaligned and some architectures, such as SPARC, can't handle
180 packet_ptr = *ret_buffer;
182 memcpy (packet_ptr + offset, &pkg_ph, sizeof (pkg_ph));
183 offset += sizeof (pkg_ph);
184 memcpy (packet_ptr + offset, &pkg_num_values, sizeof (pkg_num_values));
185 offset += sizeof (pkg_num_values);
186 memcpy (packet_ptr + offset, pkg_values_types, num_values * sizeof (uint8_t));
187 offset += num_values * sizeof (uint8_t);
188 memcpy (packet_ptr + offset, pkg_values, num_values * sizeof (value_t));
189 offset += num_values * sizeof (value_t);
191 assert (offset == packet_len);
193 *ret_buffer = packet_ptr + packet_len;
194 *ret_buffer_len -= packet_len;
196 free (pkg_values_types);
200 } /* int write_part_values */
202 static int write_part_number (char **ret_buffer, int *ret_buffer_len,
203 int type, uint64_t value)
208 part_header_t pkg_head;
213 packet_len = sizeof (pkg_head) + sizeof (pkg_value);
215 if (*ret_buffer_len < packet_len)
218 pkg_head.type = htons (type);
219 pkg_head.length = htons (packet_len);
220 pkg_value = htonll (value);
222 packet_ptr = *ret_buffer;
224 memcpy (packet_ptr + offset, &pkg_head, sizeof (pkg_head));
225 offset += sizeof (pkg_head);
226 memcpy (packet_ptr + offset, &pkg_value, sizeof (pkg_value));
227 offset += sizeof (pkg_value);
229 assert (offset == packet_len);
231 *ret_buffer = packet_ptr + packet_len;
232 *ret_buffer_len -= packet_len;
235 } /* int write_part_number */
237 static int write_part_string (char **ret_buffer, int *ret_buffer_len,
238 int type, const char *str, int str_len)
248 buffer_len = 2 * sizeof (uint16_t) + str_len + 1;
249 if (*ret_buffer_len < buffer_len)
252 pkg_type = htons (type);
253 pkg_length = htons (buffer_len);
255 buffer = *ret_buffer;
257 memcpy (buffer + offset, (void *) &pkg_type, sizeof (pkg_type));
258 offset += sizeof (pkg_type);
259 memcpy (buffer + offset, (void *) &pkg_length, sizeof (pkg_length));
260 offset += sizeof (pkg_length);
261 memcpy (buffer + offset, str, str_len);
263 memset (buffer + offset, '\0', 1);
266 assert (offset == buffer_len);
268 *ret_buffer = buffer + buffer_len;
269 *ret_buffer_len -= buffer_len;
272 } /* int write_part_string */
274 static int parse_part_values (void **ret_buffer, size_t *ret_buffer_len,
275 value_t **ret_values, int *ret_num_values)
277 char *buffer = *ret_buffer;
278 size_t buffer_len = *ret_buffer_len;
293 NOTICE ("network plugin: packet is too short: "
294 "buffer_len = %zu", buffer_len);
298 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
299 buffer += sizeof (tmp16);
300 pkg_type = ntohs (tmp16);
302 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
303 buffer += sizeof (tmp16);
304 pkg_length = ntohs (tmp16);
306 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
307 buffer += sizeof (tmp16);
308 pkg_numval = ntohs (tmp16);
310 assert (pkg_type == TYPE_VALUES);
312 exp_size = 3 * sizeof (uint16_t)
313 + pkg_numval * (sizeof (uint8_t) + sizeof (value_t));
314 if ((buffer_len < 0) || (buffer_len < exp_size))
316 WARNING ("network plugin: parse_part_values: "
318 "Chunk of size %zu expected, "
319 "but buffer has only %zu bytes left.",
320 exp_size, buffer_len);
324 if (pkg_length != exp_size)
326 WARNING ("network plugin: parse_part_values: "
327 "Length and number of values "
328 "in the packet don't match.");
332 pkg_types = (uint8_t *) malloc (pkg_numval * sizeof (uint8_t));
333 pkg_values = (value_t *) malloc (pkg_numval * sizeof (value_t));
334 if ((pkg_types == NULL) || (pkg_values == NULL))
338 ERROR ("network plugin: parse_part_values: malloc failed.");
342 memcpy ((void *) pkg_types, (void *) buffer, pkg_numval * sizeof (uint8_t));
343 buffer += pkg_numval * sizeof (uint8_t);
344 memcpy ((void *) pkg_values, (void *) buffer, pkg_numval * sizeof (value_t));
345 buffer += pkg_numval * sizeof (value_t);
347 for (i = 0; i < pkg_numval; i++)
349 switch (pkg_types[i])
351 case DS_TYPE_COUNTER:
352 pkg_values[i].counter = (counter_t) ntohll (pkg_values[i].counter);
356 pkg_values[i].gauge = (gauge_t) ntohd (pkg_values[i].gauge);
360 pkg_values[i].derive = (derive_t) ntohll (pkg_values[i].derive);
363 case DS_TYPE_ABSOLUTE:
364 pkg_values[i].absolute = (absolute_t) ntohll (pkg_values[i].absolute);
368 NOTICE ("network plugin: parse_part_values: "
369 "Don't know how to handle data source type %"PRIu8,
374 } /* switch (pkg_types[i]) */
377 *ret_buffer = buffer;
378 *ret_buffer_len = buffer_len - pkg_length;
379 *ret_num_values = pkg_numval;
380 *ret_values = pkg_values;
385 } /* int parse_part_values */
387 static int add_to_buffer (char *buffer, int buffer_size, /* {{{ */
388 value_list_t *vl_def,
389 const data_set_t *ds, const value_list_t *vl)
391 char *buffer_orig = buffer;
393 if (strcmp (vl_def->host, vl->host) != 0)
395 if (write_part_string (&buffer, &buffer_size, TYPE_HOST,
396 vl->host, strlen (vl->host)) != 0)
398 sstrncpy (vl_def->host, vl->host, sizeof (vl_def->host));
401 if (vl_def->time != vl->time)
403 if (write_part_number (&buffer, &buffer_size, TYPE_TIME,
404 (uint64_t) vl->time))
406 vl_def->time = vl->time;
409 if (vl_def->interval != vl->interval)
411 if (write_part_number (&buffer, &buffer_size, TYPE_INTERVAL,
412 (uint64_t) vl->interval))
414 vl_def->interval = vl->interval;
417 if (strcmp (vl_def->plugin, vl->plugin) != 0)
419 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN,
420 vl->plugin, strlen (vl->plugin)) != 0)
422 sstrncpy (vl_def->plugin, vl->plugin, sizeof (vl_def->plugin));
425 if (strcmp (vl_def->plugin_instance, vl->plugin_instance) != 0)
427 if (write_part_string (&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
429 strlen (vl->plugin_instance)) != 0)
431 sstrncpy (vl_def->plugin_instance, vl->plugin_instance, sizeof (vl_def->plugin_instance));
434 if (strcmp (vl_def->type, vl->type) != 0)
436 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE,
437 vl->type, strlen (vl->type)) != 0)
439 sstrncpy (vl_def->type, ds->type, sizeof (vl_def->type));
442 if (strcmp (vl_def->type_instance, vl->type_instance) != 0)
444 if (write_part_string (&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
446 strlen (vl->type_instance)) != 0)
448 sstrncpy (vl_def->type_instance, vl->type_instance, sizeof (vl_def->type_instance));
451 if (write_part_values (&buffer, &buffer_size, ds, vl) != 0)
454 return (buffer - buffer_orig);
455 } /* }}} int add_to_buffer */
457 static int parse_part_number (void **ret_buffer, size_t *ret_buffer_len,
460 char *buffer = *ret_buffer;
461 size_t buffer_len = *ret_buffer_len;
465 size_t exp_size = 2 * sizeof (uint16_t) + sizeof (uint64_t);
470 if ((buffer_len < 0) || ((size_t) buffer_len < exp_size))
472 WARNING ("network plugin: parse_part_number: "
474 "Chunk of size %zu expected, "
475 "but buffer has only %zu bytes left.",
476 exp_size, buffer_len);
480 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
481 buffer += sizeof (tmp16);
482 pkg_type = ntohs (tmp16);
484 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
485 buffer += sizeof (tmp16);
486 pkg_length = ntohs (tmp16);
488 memcpy ((void *) &tmp64, buffer, sizeof (tmp64));
489 buffer += sizeof (tmp64);
490 *value = ntohll (tmp64);
492 *ret_buffer = buffer;
493 *ret_buffer_len = buffer_len - pkg_length;
496 } /* int parse_part_number */
498 static int parse_part_string (void **ret_buffer, size_t *ret_buffer_len,
499 char *output, int output_len)
501 char *buffer = *ret_buffer;
502 size_t buffer_len = *ret_buffer_len;
505 size_t header_size = 2 * sizeof (uint16_t);
510 if ((buffer_len < 0) || (buffer_len < header_size))
512 WARNING ("network plugin: parse_part_string: "
514 "Chunk of at least size %zu expected, "
515 "but buffer has only %zu bytes left.",
516 header_size, buffer_len);
520 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
521 buffer += sizeof (tmp16);
522 pkg_type = ntohs (tmp16);
524 memcpy ((void *) &tmp16, buffer, sizeof (tmp16));
525 buffer += sizeof (tmp16);
526 pkg_length = ntohs (tmp16);
528 /* Check that packet fits in the input buffer */
529 if (pkg_length > buffer_len)
531 WARNING ("network plugin: parse_part_string: "
533 "Chunk of size %"PRIu16" received, "
534 "but buffer has only %zu bytes left.",
535 pkg_length, buffer_len);
539 /* Check that pkg_length is in the valid range */
540 if (pkg_length <= header_size)
542 WARNING ("network plugin: parse_part_string: "
544 "Header claims this packet is only %hu "
545 "bytes long.", pkg_length);
549 /* Check that the package data fits into the output buffer.
550 * The previous if-statement ensures that:
551 * `pkg_length > header_size' */
553 || ((size_t) output_len < ((size_t) pkg_length - header_size)))
555 WARNING ("network plugin: parse_part_string: "
556 "Output buffer too small.");
560 /* All sanity checks successfull, let's copy the data over */
561 output_len = pkg_length - header_size;
562 memcpy ((void *) output, (void *) buffer, output_len);
563 buffer += output_len;
565 /* For some very weird reason '\0' doesn't do the trick on SPARC in
567 if (output[output_len - 1] != 0)
569 WARNING ("network plugin: parse_part_string: "
570 "Received string does not end "
571 "with a NULL-byte.");
575 *ret_buffer = buffer;
576 *ret_buffer_len = buffer_len - pkg_length;
579 } /* int parse_part_string */
582 static int parse_packet (sockent_t *se, /* {{{ */
583 void *buffer, size_t buffer_size, int flags,
584 const char *username)
588 value_list_t vl = VALUE_LIST_INIT;
592 int packet_was_signed = (flags & PP_SIGNED);
593 int packet_was_encrypted = (flags & PP_ENCRYPTED);
594 int printed_ignore_warning = 0;
595 #endif /* HAVE_LIBGCRYPT */
598 memset (&vl, '\0', sizeof (vl));
599 memset (&n, '\0', sizeof (n));
602 while ((status == 0) && (0 < buffer_size)
603 && ((unsigned int) buffer_size > sizeof (part_header_t)))
608 memcpy ((void *) &pkg_type,
611 memcpy ((void *) &pkg_length,
612 (void *) (buffer + sizeof (pkg_type)),
613 sizeof (pkg_length));
615 pkg_length = ntohs (pkg_length);
616 pkg_type = ntohs (pkg_type);
618 if (pkg_length > buffer_size)
620 /* Ensure that this loop terminates eventually */
621 if (pkg_length < (2 * sizeof (uint16_t)))
624 if (pkg_type == TYPE_ENCR_AES256)
626 status = parse_part_encr_aes256 (se,
627 &buffer, &buffer_size, flags);
630 ERROR ("network plugin: Decrypting AES256 "
632 "with status %i.", status);
637 else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT)
638 && (packet_was_encrypted == 0))
640 if (printed_ignore_warning == 0)
642 INFO ("network plugin: Unencrypted packet or "
643 "part has been ignored.");
644 printed_ignore_warning = 1;
646 buffer = ((char *) buffer) + pkg_length;
649 #endif /* HAVE_LIBGCRYPT */
650 else if (pkg_type == TYPE_SIGN_SHA256)
652 status = parse_part_sign_sha256 (se,
653 &buffer, &buffer_size, flags);
656 ERROR ("network plugin: Verifying HMAC-SHA-256 "
658 "with status %i.", status);
663 else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN)
664 && (packet_was_encrypted == 0)
665 && (packet_was_signed == 0))
667 if (printed_ignore_warning == 0)
669 INFO ("network plugin: Unsigned packet or "
670 "part has been ignored.");
671 printed_ignore_warning = 1;
673 buffer = ((char *) buffer) + pkg_length;
676 #endif /* HAVE_LIBGCRYPT */
677 else if (pkg_type == TYPE_VALUES)
679 status = parse_part_values (&buffer, &buffer_size,
680 &vl.values, &vl.values_len);
684 network_dispatch_values (&vl, username);
688 else if (pkg_type == TYPE_TIME)
691 status = parse_part_number (&buffer, &buffer_size,
695 vl.time = (time_t) tmp;
696 n.time = (time_t) tmp;
699 else if (pkg_type == TYPE_INTERVAL)
702 status = parse_part_number (&buffer, &buffer_size,
705 vl.interval = (int) tmp;
707 else if (pkg_type == TYPE_HOST)
709 status = parse_part_string (&buffer, &buffer_size,
710 vl.host, sizeof (vl.host));
712 sstrncpy (n.host, vl.host, sizeof (n.host));
714 else if (pkg_type == TYPE_PLUGIN)
716 status = parse_part_string (&buffer, &buffer_size,
717 vl.plugin, sizeof (vl.plugin));
719 sstrncpy (n.plugin, vl.plugin,
722 else if (pkg_type == TYPE_PLUGIN_INSTANCE)
724 status = parse_part_string (&buffer, &buffer_size,
726 sizeof (vl.plugin_instance));
728 sstrncpy (n.plugin_instance,
730 sizeof (n.plugin_instance));
732 else if (pkg_type == TYPE_TYPE)
734 status = parse_part_string (&buffer, &buffer_size,
735 vl.type, sizeof (vl.type));
737 sstrncpy (n.type, vl.type, sizeof (n.type));
739 else if (pkg_type == TYPE_TYPE_INSTANCE)
741 status = parse_part_string (&buffer, &buffer_size,
743 sizeof (vl.type_instance));
745 sstrncpy (n.type_instance, vl.type_instance,
746 sizeof (n.type_instance));
748 else if (pkg_type == TYPE_MESSAGE)
750 status = parse_part_string (&buffer, &buffer_size,
751 n.message, sizeof (n.message));
757 else if ((n.severity != NOTIF_FAILURE)
758 && (n.severity != NOTIF_WARNING)
759 && (n.severity != NOTIF_OKAY))
761 INFO ("network plugin: "
762 "Ignoring notification with "
763 "unknown severity %i.",
766 else if (n.time <= 0)
768 INFO ("network plugin: "
769 "Ignoring notification with "
772 else if (strlen (n.message) <= 0)
774 INFO ("network plugin: "
775 "Ignoring notification with "
776 "an empty message.");
780 plugin_dispatch_notification (&n);
783 else if (pkg_type == TYPE_SEVERITY)
786 status = parse_part_number (&buffer, &buffer_size,
789 n.severity = (int) tmp;
793 DEBUG ("network plugin: parse_packet: Unknown part"
794 " type: 0x%04hx", pkg_type);
795 buffer = ((char *) buffer) + pkg_length;
797 } /* while (buffer_size > sizeof (part_header_t)) */
799 if (status == 0 && buffer_size > 0)
800 WARNING ("network plugin: parse_packet: Received truncated "
801 "packet, try increasing `MaxPacketSize'");
804 } /* }}} int parse_packet */
813 ////////////////////////////
814 //// END OF COPY / PASTE ///
815 ////////////////////////////
820 static const char *config_keys[] =
825 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
828 static char *zmq_listen_on = NULL;
829 static char *zmq_send_to = NULL;
832 static int thread_running = 1;
833 static pthread_t listen_thread_id;
834 static void *zmq_context = NULL;
835 static void *push_socket = NULL;
836 static void *pull_socket = NULL;
843 static int my_config (const char *key, const char *value)
845 if( strcasecmp(key, "ListenOn") == 0 ) {
846 if( zmq_listen_on != NULL ) {
848 zmq_listen_on = NULL;
851 if( zmq_listen_on = strdup(value)) == NULL ) {
855 else if( strcasecmp(key, "SendDataTo") == 0 ) {
856 if( zmq_send_to != NULL ) {
861 if( zmq_send_to = strdup(value)) == NULL ) {
870 static void *receive_thread (void __attribute__((unused)) *arg)
876 while( thread_running ) {
877 status = zmq_msg_init(&msg);
878 assert( status == 0 );
879 if( zmq_recv(&pull_socket, &msg, 0) != 0 ) {
880 WARNING("zmq_recv : %s", zmq_strerror(errno));
884 data = zmq_msg_data(&msg);
885 data_size = zmq_msg_size(&msg);
887 parse_packet(NULL, data, data_size,
889 /* username = */ NULL);
895 static int plugin_init (void)
897 int major, minor, patch, status;
898 zmq_version (&major, &minor, &patch);
901 // init zeromq (1 I/O thread)
902 zmq_context = zmq_init(1);
903 if( zmq_context == NULL ) {
904 ERROR("zmq_init : %s", zmq_strerror(errno));
908 // start listening socket
909 if( zmq_listen_on != NULL ) {
910 pull_socket = zmq_socket(zmq_context, ZMQ_PULL);
911 if( pull_socket == NULL ) {
912 ERROR("zmq_socket : %s", zmq_strerror(errno));
916 // and bind it to the inbound queue
917 if( zmq_bind(pull_socket, zmq_listen_on) != 0 ) {
918 ERROR("zmq_bind : %s", zmq_strerror(errno));
922 // listenining thread
923 status = pthread_create(&listen_thread_id,
924 NULL /* no attributes */,
926 NULL /* no argument */);
929 ERROR("network: pthread_create failed: %s", strerror(errno));
933 INFO("ZeroMQ listening on %s", zmq_listen_on);
937 if( zmq_send_to != NULL ) {
938 push_socket = zmq_socket(zmq_context, ZMQ_PUSH);
940 if( push_socket == NULL ) {
941 ERROR("zmq_socket : %s", zmq_strerror(errno));
945 // and connect to remote host
946 if( zmq_connect(push_socket, zmq_send_to) != 0 ) {
947 ERROR("zmq_connect : %s", zmq_strerror(errno));
951 INFO("ZeroMQ pushing to %s", zmq_send_to);
956 INFO("ZeroMQ plugin initialized (zeromq v%d.%d.%d).", major, minor, patch);
962 static int write_notification (const notification_t *n, user_data_t __attribute__((unused)) *user_data)
967 void free_data(void *data, void *hint)
972 #define PACKET_SIZE 512
974 static int write_value (const data_set_t *ds, const value_list_t *vl)
978 int send_buffer_size = PACKET_SIZE, real_size;
980 send_buffer = malloc(PACKET_SIZE);
981 if( send_buffer == NULL ) {
982 ERROR("Unable to allocate memory for send_buffer, aborting write");
987 memset(send_buffer, 0, PACKET_SIZE);
989 real_size = add_to_buffer(send_buffer, send_buffer_size, &send_buffer_vl, ds, vl);
991 // zeromq will free the memory when needed by calling the free_data function
992 if( zmq_msg_init_data(&msg, packet_data, real_size, free_data, NULL) != 0 ) {
993 ERROR("zmq_msg_init : %s", zmq_strerror(errno));
997 // try to send the message
998 if( zmq_send(push_socket, &msg, ZMQ_NOBLOCK) != 0 ) {
999 if( errno == EAGAIN ) {
1000 WARNING("ZeroMQ: Cannot send message, queue is full");
1003 ERROR("zmq_send : %s", zmq_strerror(errno));
1011 static int my_shutdown (void)
1016 pthread_join(&listen_thread_id, NULL);
1018 if( zmq_term(zmq_context) != 0 ) {
1019 ERROR("zmq_term : %s", zmq_strerror(errno));
1027 void module_register (void)
1029 plugin_register_config("zeromq", my_config, config_keys, config_keys_num);
1030 plugin_register_init("zeromq", plugin_init);
1031 plugin_register_write("zeromq", write_value);
1032 plugin_register_notification ("network", write_notification,
1033 /* user_data = */ NULL);
1034 plugin_register_shutdown ("zeromq", my_shutdown);