1 /**
2 * collectd - src/gmond.c
3 * Copyright (C) 2005-2009 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Florian octo Forster <octo at verplant.org>
20 **/
22 #include "collectd.h"
23 #include "plugin.h"
24 #include "common.h"
25 #include "configfile.h"
26 #include "utils_avltree.h"
28 #include "network.h"
30 #if HAVE_PTHREAD_H
31 # include <pthread.h>
32 #endif
33 #if HAVE_SYS_SOCKET_H
34 # include <sys/socket.h>
35 #endif
36 #if HAVE_NETDB_H
37 # include <netdb.h>
38 #endif
39 #if HAVE_NETINET_IN_H
40 # include <netinet/in.h>
41 #endif
42 #if HAVE_ARPA_INET_H
43 # include <arpa/inet.h>
44 #endif
45 #if HAVE_POLL_H
46 # include <poll.h>
47 #endif
49 #include <gm_protocol.h>
51 #ifndef IPV6_ADD_MEMBERSHIP
52 # ifdef IPV6_JOIN_GROUP
53 # define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
54 # else
55 # error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
56 # endif
57 #endif /* !IP_ADD_MEMBERSHIP */
59 #ifdef GANGLIA_MAX_MESSAGE_LEN
60 # define BUFF_SIZE GANGLIA_MAX_MESSAGE_LEN
61 #else
62 # define BUFF_SIZE 1400
63 #endif
65 struct socket_entry_s
66 {
67 int fd;
68 struct sockaddr_storage addr;
69 socklen_t addrlen;
70 };
71 typedef struct socket_entry_s socket_entry_t;
73 struct staging_entry_s
74 {
75 char key[2 * DATA_MAX_NAME_LEN];
76 value_list_t vl;
77 int flags;
78 };
79 typedef struct staging_entry_s staging_entry_t;
81 struct metric_map_s
82 {
83 const char *ganglia_name;
84 const char *type;
85 const char *type_instance;
86 int ds_type;
87 size_t value_index;
88 };
89 typedef struct metric_map_s metric_map_t;
91 static struct pollfd *mc_receive_sockets = NULL;
92 static size_t mc_receive_sockets_num = 0;
94 static socket_entry_t *mc_send_sockets = NULL;
95 static size_t mc_send_sockets_num = 0;
96 static pthread_mutex_t mc_send_sockets_lock = PTHREAD_MUTEX_INITIALIZER;
98 static int mc_receive_thread_loop = 0;
99 static int mc_receive_thread_running = 0;
100 static pthread_t mc_receive_thread_id;
102 static metric_map_t metric_map[] =
103 {
104 { "load_one", "load", "", DS_TYPE_GAUGE, 0 },
105 { "load_five", "load", "", DS_TYPE_GAUGE, 1 },
106 { "load_fifteen", "load", "", DS_TYPE_GAUGE, 2 },
107 { "cpu_user", "cpu", "user", DS_TYPE_COUNTER, 0 },
108 { "cpu_system", "cpu", "system", DS_TYPE_COUNTER, 0 },
109 { "cpu_idle", "cpu", "idle", DS_TYPE_COUNTER, 0 },
110 { "cpu_nice", "cpu", "nice", DS_TYPE_COUNTER, 0 },
111 { "cpu_wio", "cpu", "wait", DS_TYPE_COUNTER, 0 },
112 { "mem_free", "memory", "free", DS_TYPE_GAUGE, 0 },
113 { "mem_shared", "memory", "shared", DS_TYPE_GAUGE, 0 },
114 { "mem_buffers", "memory", "buffered", DS_TYPE_GAUGE, 0 },
115 { "mem_cached", "memory", "cached", DS_TYPE_GAUGE, 0 },
116 { "mem_total", "memory", "total", DS_TYPE_GAUGE, 0 },
117 { "bytes_in", "if_octets", "", DS_TYPE_COUNTER, 0 },
118 { "bytes_out", "if_octets", "", DS_TYPE_COUNTER, 1 },
119 { "pkts_in", "if_packets", "", DS_TYPE_COUNTER, 0 },
120 { "pkts_out", "if_packets", "", DS_TYPE_COUNTER, 1 }
121 };
122 static size_t metric_map_len = STATIC_ARRAY_SIZE (metric_map);
124 static c_avl_tree_t *staging_tree;
125 static pthread_mutex_t staging_lock = PTHREAD_MUTEX_INITIALIZER;
127 static int create_sockets (socket_entry_t **ret_sockets, /* {{{ */
128 size_t *ret_sockets_num,
129 const char *node, const char *service, int listen)
130 {
131 struct addrinfo ai_hints;
132 struct addrinfo *ai_list;
133 struct addrinfo *ai_ptr;
134 int ai_return;
136 socket_entry_t *sockets;
137 size_t sockets_num;
139 int status;
141 sockets = *ret_sockets;
142 sockets_num = *ret_sockets_num;
144 memset (&ai_hints, 0, sizeof (ai_hints));
145 ai_hints.ai_flags = 0;
146 #ifdef AI_PASSIVE
147 ai_hints.ai_flags |= AI_PASSIVE;
148 #endif
149 #ifdef AI_ADDRCONFIG
150 ai_hints.ai_flags |= AI_ADDRCONFIG;
151 #endif
152 ai_hints.ai_family = AF_UNSPEC;
153 ai_hints.ai_socktype = SOCK_DGRAM;
154 ai_hints.ai_protocol = IPPROTO_UDP;
156 ai_return = getaddrinfo (node, service, &ai_hints, &ai_list);
157 if (ai_return != 0)
158 {
159 char errbuf[1024];
160 ERROR ("gmond plugin: getaddrinfo (%s, %s) failed: %s",
161 (node == NULL) ? "(null)" : node,
162 (service == NULL) ? "(null)" : service,
163 (ai_return == EAI_SYSTEM)
164 ? sstrerror (errno, errbuf, sizeof (errbuf))
165 : gai_strerror (ai_return));
166 return (-1);
167 }
169 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) /* {{{ */
170 {
171 socket_entry_t *tmp;
173 tmp = realloc (sockets, (sockets_num + 1) * sizeof (*sockets));
174 if (tmp == NULL)
175 {
176 ERROR ("gmond plugin: realloc failed.");
177 continue;
178 }
179 sockets = tmp;
181 sockets[sockets_num].fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
182 ai_ptr->ai_protocol);
183 if (sockets[sockets_num].fd < 0)
184 {
185 char errbuf[1024];
186 ERROR ("gmond plugin: socket failed: %s",
187 sstrerror (errno, errbuf, sizeof (errbuf)));
188 continue;
189 }
191 assert (sizeof (sockets[sockets_num].addr) >= ai_ptr->ai_addrlen);
192 memcpy (&sockets[sockets_num].addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
193 sockets[sockets_num].addrlen = ai_ptr->ai_addrlen;
195 /* Sending socket: Open only one socket and don't bind it. */
196 if (listen == 0)
197 {
198 sockets_num++;
199 break;
200 }
201 else
202 {
203 int yes = 1;
205 setsockopt (sockets[sockets_num].fd, SOL_SOCKET, SO_REUSEADDR,
206 (void *) &yes, sizeof (yes));
207 }
209 status = bind (sockets[sockets_num].fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
210 if (status != 0)
211 {
212 char errbuf[1024];
213 ERROR ("gmond plugin: bind failed: %s",
214 sstrerror (errno, errbuf, sizeof (errbuf)));
215 close (sockets[sockets_num].fd);
216 continue;
217 }
219 if (ai_ptr->ai_family == AF_INET)
220 {
221 struct sockaddr_in *addr;
222 struct ip_mreq mreq;
223 int loop;
225 addr = (struct sockaddr_in *) ai_ptr->ai_addr;
227 if (!IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
228 {
229 sockets_num++;
230 continue;
231 }
233 loop = 1;
234 setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_MULTICAST_LOOP,
235 (void *) &loop, sizeof (loop));
237 memset (&mreq, 0, sizeof (mreq));
238 mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
239 mreq.imr_interface.s_addr = htonl (INADDR_ANY);
240 setsockopt (sockets[sockets_num].fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
241 (void *) &mreq, sizeof (mreq));
242 } /* if (ai_ptr->ai_family == AF_INET) */
243 else if (ai_ptr->ai_family == AF_INET6)
244 {
245 struct sockaddr_in6 *addr;
246 struct ipv6_mreq mreq;
247 int loop;
249 addr = (struct sockaddr_in6 *) ai_ptr->ai_addr;
251 if (!IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
252 {
253 sockets_num++;
254 continue;
255 }
257 loop = 1;
258 setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
259 (void *) &loop, sizeof (loop));
261 memset (&mreq, 0, sizeof (mreq));
262 memcpy (&mreq.ipv6mr_multiaddr,
263 &addr->sin6_addr, sizeof (addr->sin6_addr));
264 mreq.ipv6mr_interface = 0; /* any */
265 setsockopt (sockets[sockets_num].fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
266 (void *) &mreq, sizeof (mreq));
267 } /* if (ai_ptr->ai_family == AF_INET6) */
269 sockets_num++;
270 } /* }}} for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
272 freeaddrinfo (ai_list);
274 if ((*ret_sockets_num) >= sockets_num)
275 return (-1);
277 *ret_sockets = sockets;
278 *ret_sockets_num = sockets_num;
279 return (0);
280 } /* }}} int create_sockets */
282 static int request_meta_data (const char *host, const char *name) /* {{{ */
283 {
284 Ganglia_metadata_msg msg;
285 char buffer[BUFF_SIZE];
286 unsigned int buffer_size;
287 XDR xdr;
288 size_t i;
290 memset (&msg, 0, sizeof (msg));
292 msg.id = gmetadata_request;
293 msg.Ganglia_metadata_msg_u.grequest.metric_id.host = strdup (host);
294 msg.Ganglia_metadata_msg_u.grequest.metric_id.name = strdup (name);
296 if ((msg.Ganglia_metadata_msg_u.grequest.metric_id.host == NULL)
297 || (msg.Ganglia_metadata_msg_u.grequest.metric_id.name == NULL))
298 {
299 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
300 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
301 return (-1);
302 }
304 memset (buffer, 0, sizeof (buffer));
305 xdrmem_create (&xdr, buffer, sizeof (buffer), XDR_ENCODE);
307 if (!xdr_Ganglia_metadata_msg (&xdr, &msg))
308 {
309 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
310 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
311 return (-1);
312 }
314 buffer_size = xdr_getpos (&xdr);
316 DEBUG ("gmond plugin: Requesting meta data for %s/%s.",
317 host, name);
319 pthread_mutex_lock (&mc_send_sockets_lock);
320 for (i = 0; i < mc_send_sockets_num; i++)
321 sendto (mc_send_sockets[i].fd, buffer, (size_t) buffer_size,
322 /* flags = */ 0,
323 (struct sockaddr *) &mc_send_sockets[i].addr,
324 mc_send_sockets[i].addrlen);
325 pthread_mutex_unlock (&mc_send_sockets_lock);
327 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.host);
328 sfree (msg.Ganglia_metadata_msg_u.grequest.metric_id.name);
329 return (0);
330 } /* }}} int request_meta_data */
332 static staging_entry_t *staging_entry_get (const char *host, /* {{{ */
333 const char *name,
334 const char *type, const char *type_instance,
335 int values_len)
336 {
337 char key[2 * DATA_MAX_NAME_LEN];
338 staging_entry_t *se;
339 int status;
341 if (staging_tree == NULL)
342 return (NULL);
344 ssnprintf (key, sizeof (key), "%s/%s/%s", host, type, type_instance);
346 se = NULL;
347 status = c_avl_get (staging_tree, key, (void *) &se);
348 if (status == 0)
349 return (se);
351 /* insert new entry */
352 se = (staging_entry_t *) malloc (sizeof (*se));
353 if (se == NULL)
354 return (NULL);
355 memset (se, 0, sizeof (*se));
357 sstrncpy (se->key, key, sizeof (se->key));
358 se->flags = 0;
360 se->vl.values = (value_t *) calloc (values_len, sizeof (*se->vl.values));
361 if (se->vl.values == NULL)
362 {
363 sfree (se);
364 return (NULL);
365 }
366 se->vl.values_len = values_len;
368 se->vl.time = 0;
369 se->vl.interval = 0;
370 sstrncpy (se->vl.host, host, sizeof (se->vl.host));
371 sstrncpy (se->vl.plugin, "gmond", sizeof (se->vl.plugin));
372 sstrncpy (se->vl.type, type, sizeof (se->vl.type));
373 if (type_instance != NULL)
374 sstrncpy (se->vl.type_instance, type_instance,
375 sizeof (se->vl.type_instance));
377 status = c_avl_insert (staging_tree, se->key, se);
378 if (status != 0)
379 {
380 ERROR ("gmond plugin: c_avl_insert failed.");
381 sfree (se->vl.values);
382 sfree (se);
383 return (NULL);
384 }
386 return (se);
387 } /* }}} staging_entry_t *staging_entry_get */
389 static int staging_entry_submit (const char *host, const char *name, /* {{{ */
390 staging_entry_t *se)
391 {
392 value_list_t vl;
393 value_t values[se->vl.values_len];
395 if (se->vl.interval == 0)
396 {
397 /* No meta data has been received for this metric yet. */
398 se->flags = 0;
399 pthread_mutex_unlock (&staging_lock);
400 request_meta_data (host, name);
401 return (0);
402 }
404 se->flags = 0;
406 memcpy (values, se->vl.values, sizeof (values));
407 memcpy (&vl, &se->vl, sizeof (vl));
409 /* Unlock before calling `plugin_dispatch_values'.. */
410 pthread_mutex_unlock (&staging_lock);
412 vl.values = values;
414 plugin_dispatch_values (&vl);
416 return (0);
417 } /* }}} int staging_entry_submit */
419 static int staging_entry_update (const char *host, const char *name, /* {{{ */
420 const char *type, const char *type_instance,
421 int value_index, int ds_type, value_t value)
422 {
423 const data_set_t *ds;
424 staging_entry_t *se;
426 ds = plugin_get_ds (type);
427 if (ds == NULL)
428 {
429 ERROR ("gmond plugin: Looking up type %s failed.", type);
430 return (-1);
431 }
433 if (ds->ds_num <= value_index)
434 {
435 ERROR ("gmond plugin: Invalid index %i: %s has only %i data source(s).",
436 value_index, ds->type, ds->ds_num);
437 return (-1);
438 }
440 pthread_mutex_lock (&staging_lock);
442 se = staging_entry_get (host, name, type, type_instance, ds->ds_num);
443 if (se == NULL)
444 {
445 pthread_mutex_unlock (&staging_lock);
446 ERROR ("gmond plugin: staging_entry_get failed.");
447 return (-1);
448 }
449 if (se->vl.values_len != ds->ds_num)
450 {
451 pthread_mutex_unlock (&staging_lock);
452 return (-1);
453 }
455 if (ds_type == DS_TYPE_COUNTER)
456 se->vl.values[value_index].counter += value.counter;
457 else if (ds_type == DS_TYPE_GAUGE)
458 se->vl.values[value_index].gauge = value.gauge;
459 se->flags |= (0x01 << value_index);
461 DEBUG ("gmond plugin: key = %s; flags = %i;",
462 se->key, se->flags);
464 /* Check if all values have been set and submit if so. */
465 if (se->flags == ((0x01 << se->vl.values_len) - 1))
466 {
467 /* `staging_lock' is unlocked in `staging_entry_submit'. */
468 staging_entry_submit (host, name, se);
469 }
470 else
471 {
472 pthread_mutex_unlock (&staging_lock);
473 }
475 return (0);
476 } /* }}} int staging_entry_update */
478 static int mc_handle_value_msg (Ganglia_value_msg *msg) /* {{{ */
479 {
480 const char *host;
481 const char *name;
483 value_t value_counter;
484 value_t value_gauge;
486 size_t i;
488 /* Fill in `host', `name', `value_counter', and `value_gauge' according to
489 * the value type, or return with an error. */
490 switch (msg->id) /* {{{ */
491 {
492 case gmetric_uint:
493 {
494 Ganglia_gmetric_uint msg_uint;
496 msg_uint = msg->Ganglia_value_msg_u.gu_int;
498 host = msg_uint.metric_id.host;
499 name = msg_uint.metric_id.name;
500 value_counter.counter = (counter_t) msg_uint.ui;
501 value_gauge.gauge = (gauge_t) msg_uint.ui;
502 break;
503 }
505 case gmetric_string:
506 {
507 Ganglia_gmetric_string msg_string;
508 char *endptr;
510 msg_string = msg->Ganglia_value_msg_u.gstr;
512 host = msg_string.metric_id.host;
513 name = msg_string.metric_id.name;
515 endptr = NULL;
516 errno = 0;
517 value_counter.counter = (counter_t) strtoll (msg_string.str,
518 &endptr, /* base = */ 0);
519 if ((endptr == msg_string.str) || (errno != 0))
520 value_counter.counter = -1;
522 endptr = NULL;
523 errno = 0;
524 value_gauge.gauge = (gauge_t) strtod (msg_string.str, &endptr);
525 if ((endptr == msg_string.str) || (errno != 0))
526 value_gauge.gauge = NAN;
528 break;
529 }
531 case gmetric_float:
532 {
533 Ganglia_gmetric_float msg_float;
535 msg_float = msg->Ganglia_value_msg_u.gf;
537 host = msg_float.metric_id.host;
538 name = msg_float.metric_id.name;
539 value_counter.counter = (counter_t) msg_float.f;
540 value_gauge.gauge = (gauge_t) msg_float.f;
541 break;
542 }
544 case gmetric_double:
545 {
546 Ganglia_gmetric_double msg_double;
548 msg_double = msg->Ganglia_value_msg_u.gd;
550 host = msg_double.metric_id.host;
551 name = msg_double.metric_id.name;
552 value_counter.counter = (counter_t) msg_double.d;
553 value_gauge.gauge = (gauge_t) msg_double.d;
554 break;
555 }
556 default:
557 DEBUG ("gmond plugin: Value type not handled: %i", msg->id);
558 return (-1);
559 } /* }}} switch (msg->id) */
561 assert (host != NULL);
562 assert (name != NULL);
564 for (i = 0; i < metric_map_len; i++)
565 {
566 if (strcmp (name, metric_map[i].ganglia_name) != 0)
567 continue;
569 return (staging_entry_update (host, name,
570 metric_map[i].type, metric_map[i].type_instance,
571 metric_map[i].value_index, metric_map[i].ds_type,
572 (metric_map[i].ds_type == DS_TYPE_COUNTER)
573 ? value_counter
574 : value_gauge));
575 }
577 DEBUG ("gmond plugin: Cannot find a translation for %s.", name);
579 return (-1);
580 } /* }}} int mc_handle_value_msg */
582 static int mc_handle_metadata_msg (Ganglia_metadata_msg *msg) /* {{{ */
583 {
584 switch (msg->id)
585 {
586 case gmetadata_full:
587 {
588 Ganglia_metadatadef msg_meta;
589 staging_entry_t *se;
590 const data_set_t *ds;
591 size_t i;
593 msg_meta = msg->Ganglia_metadata_msg_u.gfull;
595 if (msg_meta.metric.tmax <= 0)
596 return (-1);
598 for (i = 0; i < metric_map_len; i++)
599 {
600 if (strcmp (msg_meta.metric_id.name, metric_map[i].ganglia_name) == 0)
601 break;
602 }
604 if (i >= metric_map_len)
605 {
606 DEBUG ("gmond plugin: Not handling meta data %s.",
607 msg_meta.metric_id.name);
608 return (0);
609 }
611 ds = plugin_get_ds (metric_map[i].type);
612 if (ds == NULL)
613 {
614 WARNING ("gmond plugin: Could not find data set %s.",
615 metric_map[i].type);
616 return (-1);
617 }
619 DEBUG ("gmond plugin: Received meta data for %s/%s.",
620 msg_meta.metric_id.host, msg_meta.metric_id.name);
622 pthread_mutex_lock (&staging_lock);
623 se = staging_entry_get (msg_meta.metric_id.host,
624 msg_meta.metric_id.name,
625 metric_map[i].type, metric_map[i].type_instance,
626 ds->ds_num);
627 if (se != NULL)
628 se->vl.interval = (int) msg_meta.metric.tmax;
629 pthread_mutex_unlock (&staging_lock);
631 if (se == NULL)
632 {
633 ERROR ("gmond plugin: staging_entry_get failed.");
634 return (-1);
635 }
637 break;
638 }
640 default:
641 {
642 return (-1);
643 }
644 }
646 return (0);
647 } /* }}} int mc_handle_metadata_msg */
649 static int mc_handle_metric (void *buffer, size_t buffer_size) /* {{{ */
650 {
651 XDR xdr;
652 Ganglia_msg_formats format;
654 xdrmem_create (&xdr, buffer, buffer_size, XDR_DECODE);
656 xdr_Ganglia_msg_formats (&xdr, &format);
657 xdr_setpos (&xdr, 0);
659 switch (format)
660 {
661 case gmetric_ushort:
662 case gmetric_short:
663 case gmetric_int:
664 case gmetric_uint:
665 case gmetric_string:
666 case gmetric_float:
667 case gmetric_double:
668 {
669 Ganglia_value_msg msg;
671 memset (&msg, 0, sizeof (msg));
672 if (xdr_Ganglia_value_msg (&xdr, &msg))
673 mc_handle_value_msg (&msg);
674 break;
675 }
677 case gmetadata_full:
678 case gmetadata_request:
679 {
680 Ganglia_metadata_msg msg;
681 memset (&msg, 0, sizeof (msg));
682 if (xdr_Ganglia_metadata_msg (&xdr, &msg))
683 mc_handle_metadata_msg (&msg);
684 break;
685 }
687 default:
688 DEBUG ("gmond plugin: Unknown format: %i", format);
689 return (-1);
690 } /* switch (format) */
693 return (0);
694 } /* }}} int mc_handle_metric */
696 static int mc_handle_socket (struct pollfd *p) /* {{{ */
697 {
698 char buffer[BUFF_SIZE];
699 ssize_t buffer_size;
701 if ((p->revents & (POLLIN | POLLPRI)) == 0)
702 {
703 p->revents = 0;
704 return (-1);
705 }
707 buffer_size = recv (p->fd, buffer, sizeof (buffer), /* flags = */ 0);
708 if (buffer_size <= 0)
709 {
710 char errbuf[1024];
711 ERROR ("gmond plugin: recv failed: %s",
712 sstrerror (errno, errbuf, sizeof (errbuf)));
713 p->revents = 0;
714 return (-1);
715 }
717 mc_handle_metric (buffer, (size_t) buffer_size);
718 return (0);
719 } /* }}} int mc_handle_socket */
721 static void *mc_receive_thread (void *arg) /* {{{ */
722 {
723 socket_entry_t *mc_receive_socket_entries;
724 int status;
725 size_t i;
727 mc_receive_socket_entries = NULL;
728 status = create_sockets (&mc_receive_socket_entries, &mc_receive_sockets_num,
729 "239.2.11.71", "8649", /* listen = */ 1);
730 if (status != 0)
731 {
732 ERROR ("gmond plugin: create_sockets failed.");
733 return ((void *) -1);
734 }
736 mc_receive_sockets = (struct pollfd *) calloc (mc_receive_sockets_num,
737 sizeof (*mc_receive_sockets));
738 if (mc_receive_sockets == NULL)
739 {
740 ERROR ("gmond plugin: calloc failed.");
741 for (i = 0; i < mc_receive_sockets_num; i++)
742 close (mc_receive_socket_entries[i].fd);
743 free (mc_receive_socket_entries);
744 mc_receive_socket_entries = NULL;
745 mc_receive_sockets_num = 0;
746 return ((void *) -1);
747 }
749 for (i = 0; i < mc_receive_sockets_num; i++)
750 {
751 mc_receive_sockets[i].fd = mc_receive_socket_entries[i].fd;
752 mc_receive_sockets[i].events = POLLIN | POLLPRI;
753 mc_receive_sockets[i].revents = 0;
754 }
756 while (mc_receive_thread_loop != 0)
757 {
758 status = poll (mc_receive_sockets, mc_receive_sockets_num, -1);
759 if (status <= 0)
760 {
761 char errbuf[1024];
762 if (errno == EINTR)
763 continue;
764 ERROR ("gmond plugin: poll failed: %s",
765 sstrerror (errno, errbuf, sizeof (errbuf)));
766 break;
767 }
769 for (i = 0; i < mc_receive_sockets_num; i++)
770 {
771 if (mc_receive_sockets[i].revents != 0)
772 mc_handle_socket (mc_receive_sockets + i);
773 }
774 } /* while (mc_receive_thread_loop != 0) */
776 return ((void *) 0);
777 } /* }}} void *mc_receive_thread */
779 static int mc_receive_thread_start (void) /* {{{ */
780 {
781 int status;
783 if (mc_receive_thread_running != 0)
784 return (-1);
786 mc_receive_thread_loop = 1;
788 status = pthread_create (&mc_receive_thread_id, /* attr = */ NULL,
789 mc_receive_thread, /* args = */ NULL);
790 if (status != 0)
791 {
792 ERROR ("gmond plugin: Starting receive thread failed.");
793 mc_receive_thread_loop = 0;
794 return (-1);
795 }
797 mc_receive_thread_running = 1;
798 return (0);
799 } /* }}} int start_receive_thread */
801 static int mc_receive_thread_stop (void) /* {{{ */
802 {
803 if (mc_receive_thread_running == 0)
804 return (-1);
806 mc_receive_thread_loop = 0;
808 INFO ("gmond plugin: Stopping receive thread.");
809 pthread_kill (mc_receive_thread_id, SIGTERM);
810 pthread_join (mc_receive_thread_id, /* return value = */ NULL);
811 memset (&mc_receive_thread_id, 0, sizeof (mc_receive_thread_id));
813 mc_receive_thread_running = 0;
815 return (0);
816 } /* }}} int mc_receive_thread_stop */
818 /*
819 * TODO: Config:
820 *
821 * <Plugin gmond>
822 * MCReceiveFrom "239.2.11.71" "8649"
823 * MCSendTo "239.2.11.71" "8649"
824 * <Metric "load_one">
825 * Type "load"
826 * [TypeInstance "foo"]
827 * [Index 0]
828 * </Metric>
829 * </Plugin>
830 */
832 static int gmond_init (void)
833 {
834 create_sockets (&mc_send_sockets, &mc_send_sockets_num,
835 "239.2.11.71", "8649", /* listen = */ 0);
837 staging_tree = c_avl_create ((void *) strcmp);
838 if (staging_tree == NULL)
839 {
840 ERROR ("gmond plugin: c_avl_create failed.");
841 return (-1);
842 }
844 mc_receive_thread_start ();
846 return (0);
847 } /* int gmond_init */
849 static int gmond_shutdown (void)
850 {
851 size_t i;
853 mc_receive_thread_stop ();
855 pthread_mutex_lock (&mc_send_sockets_lock);
856 for (i = 0; i < mc_send_sockets_num; i++)
857 {
858 close (mc_send_sockets[i].fd);
859 mc_send_sockets[i].fd = -1;
860 }
861 sfree (mc_send_sockets);
862 mc_send_sockets_num = 0;
863 pthread_mutex_unlock (&mc_send_sockets_lock);
866 return (0);
867 } /* int gmond_shutdown */
869 void module_register (void)
870 {
871 plugin_register_init ("gmond", gmond_init);
872 plugin_register_shutdown ("gmond", gmond_shutdown);
873 }
875 /* vim: set sw=2 sts=2 et fdm=marker : */