09ad83534cdda6bb6cf913c3ae9da409bdbffffd
1 /**
2 * collectd - src/powerdns.c
3 * Copyright (C) 2007-2008 C-Ware, Inc.
4 * Copyright (C) 2008 Florian Forster
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; only version 2 of the License is applicable.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Author:
20 * Luke Heberling <lukeh at c-ware.com>
21 * Florian Forster <octo at verplant.org>
22 *
23 * DESCRIPTION
24 * Queries a PowerDNS control socket for statistics
25 **/
27 #include "collectd.h"
28 #include "common.h"
29 #include "plugin.h"
30 #include "configfile.h"
31 #include "utils_llist.h"
33 #include <sys/stat.h>
34 #include <unistd.h>
35 #include <stdlib.h>
36 #include <stdio.h>
37 #include <string.h>
38 #include <errno.h>
39 #include <sys/types.h>
40 #include <sys/socket.h>
41 #include <sys/un.h>
43 #ifndef UNIX_PATH_MAX
44 # define UNIX_PATH_MAX sizeof (((struct sockaddr_un *)0)->sun_path)
45 #endif
46 #define FUNC_ERROR(func) do { char errbuf[1024]; ERROR ("powerdns plugin: %s failed: %s", func, sstrerror (errno, errbuf, sizeof (errbuf))); } while (0)
48 #define SERVER_SOCKET LOCALSTATEDIR"/run/pdns.controlsocket"
49 #define SERVER_COMMAND "SHOW *"
51 #define RECURSOR_SOCKET LOCALSTATEDIR"/run/pdns_recursor.controlsocket"
52 #define RECURSOR_COMMAND "get noerror-answers nxdomain-answers " \
53 "servfail-answers sys-msec user-msec qa-latency cache-entries cache-hits " \
54 "cache-misses questions"
56 struct list_item_s;
57 typedef struct list_item_s list_item_t;
59 struct list_item_s
60 {
61 enum
62 {
63 SRV_AUTHORITATIVE,
64 SRV_RECURSOR
65 } server_type;
66 int (*func) (list_item_t *item);
67 char *instance;
69 char **fields;
70 int fields_num;
71 char *command;
73 struct sockaddr_un sockaddr;
74 int socktype;
75 };
77 struct statname_lookup_s
78 {
79 char *name;
80 char *type;
81 char *type_instance;
82 };
83 typedef struct statname_lookup_s statname_lookup_t;
85 /* Description of statistics returned by the recursor: {{{
86 all-outqueries counts the number of outgoing UDP queries since starting
87 answers0-1 counts the number of queries answered within 1 milisecond
88 answers100-1000 counts the number of queries answered within 1 second
89 answers10-100 counts the number of queries answered within 100 miliseconds
90 answers1-10 counts the number of queries answered within 10 miliseconds
91 answers-slow counts the number of queries answered after 1 second
92 cache-entries shows the number of entries in the cache
93 cache-hits counts the number of cache hits since starting
94 cache-misses counts the number of cache misses since starting
95 chain-resends number of queries chained to existing outstanding query
96 client-parse-errors counts number of client packets that could not be parsed
97 concurrent-queries shows the number of MThreads currently running
98 dlg-only-drops number of records dropped because of delegation only setting
99 negcache-entries shows the number of entries in the Negative answer cache
100 noerror-answers counts the number of times it answered NOERROR since starting
101 nsspeeds-entries shows the number of entries in the NS speeds map
102 nsset-invalidations number of times an nsset was dropped because it no longer worked
103 nxdomain-answers counts the number of times it answered NXDOMAIN since starting
104 outgoing-timeouts counts the number of timeouts on outgoing UDP queries since starting
105 qa-latency shows the current latency average
106 questions counts all End-user initiated queries with the RD bit set
107 resource-limits counts number of queries that could not be performed because of resource limits
108 server-parse-errors counts number of server replied packets that could not be parsed
109 servfail-answers counts the number of times it answered SERVFAIL since starting
110 spoof-prevents number of times PowerDNS considered itself spoofed, and dropped the data
111 sys-msec number of CPU milliseconds spent in 'system' mode
112 tcp-client-overflow number of times an IP address was denied TCP access because it already had too many connections
113 tcp-outqueries counts the number of outgoing TCP queries since starting
114 tcp-questions counts all incoming TCP queries (since starting)
115 throttled-out counts the number of throttled outgoing UDP queries since starting
116 throttle-entries shows the number of entries in the throttle map
117 unauthorized-tcp number of TCP questions denied because of allow-from restrictions
118 unauthorized-udp number of UDP questions denied because of allow-from restrictions
119 unexpected-packets number of answers from remote servers that were unexpected (might point to spoofing)
120 uptime number of seconds process has been running (since 3.1.5)
121 user-msec number of CPU milliseconds spent in 'user' mode
122 }}} */
124 const char* const default_server_fields[] = /* {{{ */
125 {
126 "latency"
127 "packetcache-hit",
128 "packetcache-miss",
129 "packetcache-size",
130 "query-cache-hit",
131 "query-cache-miss",
132 "recursing-answers",
133 "recursing-questions",
134 "tcp-answers",
135 "tcp-queries",
136 "udp-answers",
137 "udp-queries",
138 }; /* }}} */
139 int default_server_fields_num = STATIC_ARRAY_SIZE (default_server_fields);
141 statname_lookup_t lookup_table[] = /* {{{ */
142 {
143 /*********************
144 * Server statistics *
145 *********************/
146 /* Questions */
147 {"recursing-questions", "dns_question", "recurse"},
148 {"tcp-queries", "dns_question", "tcp"},
149 {"udp-queries", "dns_question", "udp"},
151 /* Answers */
152 {"recursing-answers", "dns_answer", "recurse"},
153 {"tcp-answers", "dns_answer", "tcp"},
154 {"udp-answers", "dns_answer", "udp"},
156 /* Cache stuff */
157 {"packetcache-hit", "cache_result", "packet-hit"},
158 {"packetcache-miss", "cache_result", "packet-miss"},
159 {"packetcache-size", "cache_size", "packet"},
160 {"query-cache-hit", "cache_result", "query-hit"},
161 {"query-cache-miss", "cache_result", "query-miss"},
163 /* Latency */
164 {"latency", "latency", NULL},
166 /* Other stuff.. */
167 {"corrupt-packets", "io_packets", "corrupt"},
168 {"deferred-cache-inserts", "counter", "cache-deferred_insert"},
169 {"deferred-cache-lookup", "counter", "cache-deferred_lookup"},
170 {"qsize-a", "cache_size", "answers"},
171 {"qsize-q", "cache_size", "questions"},
172 {"servfail-packets", "io_packets", "servfail"},
173 {"timedout-packets", "io_packets", "timeout"},
174 {"udp4-answers", "dns_answer", "udp4"},
175 {"udp4-queries", "dns_question", "queries-udp4"},
176 {"udp6-answers", "dns_answer", "udp6"},
177 {"udp6-queries", "dns_question", "queries-udp6"},
179 /***********************
180 * Recursor statistics *
181 ***********************/
182 /* Answers by return code */
183 {"noerror-answers", "dns_rcode", "NOERROR"},
184 {"nxdomain-answers", "dns_rcode", "NXDOMAIN"},
185 {"servfail-answers", "dns_rcode", "SERVFAIL"},
187 /* CPU utilization */
188 {"sys-msec", "cpu", "system"},
189 {"user-msec", "cpu", "user"},
191 /* Question-to-answer latency */
192 {"qa-latency", "latency", NULL},
194 /* Cache */
195 {"cache-entries", "cache_size", NULL},
196 {"cache-hits", "cache_result", "hit"},
197 {"cache-misses", "cache_result", "miss"},
199 /* Total number of questions.. */
200 {"questions", "dns_qtype", "total"},
202 /* All the other stuff.. */
203 {"all-outqueries", "dns_question", "outgoing"},
204 {"answers0-1", "dns_answer", "0_1"},
205 {"answers1-10", "dns_answer", "1_10"},
206 {"answers10-100", "dns_answer", "10_100"},
207 {"answers100-1000", "dns_answer", "100_1000"},
208 {"answers-slow", "dns_answer", "slow"},
209 {"chain-resends", "dns_question", "chained"},
210 {"client-parse-errors", "counter", "drops-client_parse_error"},
211 {"concurrent-queries", "dns_question", "concurrent"},
212 {"dlg-only-drops", "counter", "drops-delegation_only"},
213 {"negcache-entries", "cache_size", "negative"},
214 {"nsspeeds-entries", "gauge", "entries-ns_speeds"},
215 {"nsset-invalidations", "counter", "ns_set_invalidation"},
216 {"outgoing-timeouts", "counter", "drops-timeout_outgoing"},
217 {"resource-limits", "counter", "drops-resource_limit"},
218 {"server-parse-errors", "counter", "drops-server_parse_error"},
219 {"spoof-prevents", "counter", "drops-spoofed"},
220 {"tcp-client-overflow", "counter", "denied-client_overflow_tcp"},
221 {"tcp-outqueries", "dns_question", "outgoing-tcp"},
222 {"tcp-questions", "dns_question", "incoming-tcp"},
223 {"throttled-out", "dns_question", "outgoing-throttled"},
224 {"throttle-entries", "gauge", "entries-throttle"},
225 {"unauthorized-tcp", "counter", "denied-unauthorized_tcp"},
226 {"unauthorized-udp", "counter", "denied-unauthorized_udp"},
227 {"unexpected-packets", "dns_answer", "unexpected"}
228 /* {"uptime", "", ""} */
229 }; /* }}} */
230 int lookup_table_length = STATIC_ARRAY_SIZE (lookup_table);
232 static llist_t *list = NULL;
234 #define PDNS_LOCAL_SOCKPATH LOCALSTATEDIR"/run/"PACKAGE_NAME"-powerdns"
235 static char *local_sockpath = NULL;
237 /* TODO: Do this before 4.4:
238 * - Recursor:
239 * - Complete list of known pdns -> collectd mappings.
240 * - Update the collectd.conf(5) manpage.
241 *
242 * -octo
243 */
245 /* <http://doc.powerdns.com/recursor-stats.html> */
246 static void submit (const char *plugin_instance, /* {{{ */
247 const char *pdns_type, const char *value)
248 {
249 value_list_t vl = VALUE_LIST_INIT;
250 value_t values[1];
252 const char *type = NULL;
253 const char *type_instance = NULL;
254 const data_set_t *ds;
256 int i;
258 for (i = 0; i < lookup_table_length; i++)
259 if (strcmp (lookup_table[i].name, pdns_type) == 0)
260 break;
262 if (lookup_table[i].type == NULL)
263 return;
265 if (i >= lookup_table_length)
266 {
267 INFO ("powerdns plugin: submit: Not found in lookup table: %s = %s;",
268 pdns_type, value);
269 return;
270 }
272 type = lookup_table[i].type;
273 type_instance = lookup_table[i].type_instance;
275 ds = plugin_get_ds (type);
276 if (ds == NULL)
277 {
278 ERROR ("powerdns plugin: The lookup table returned type `%s', "
279 "but I cannot find it via `plugin_get_ds'.",
280 type);
281 return;
282 }
284 if (ds->ds_num != 1)
285 {
286 ERROR ("powerdns plugin: type `%s' has %i data sources, "
287 "but I can only handle one.",
288 type, ds->ds_num);
289 return;
290 }
292 if (ds->ds[0].type == DS_TYPE_GAUGE)
293 {
294 char *endptr = NULL;
296 values[0].gauge = strtod (value, &endptr);
298 if (endptr == value)
299 {
300 ERROR ("powerdns plugin: Cannot convert `%s' "
301 "to a floating point number.", value);
302 return;
303 }
304 }
305 else
306 {
307 char *endptr = NULL;
309 values[0].counter = strtoll (value, &endptr, 0);
310 if (endptr == value)
311 {
312 ERROR ("powerdns plugin: Cannot convert `%s' "
313 "to an integer number.", value);
314 return;
315 }
316 }
318 vl.values = values;
319 vl.values_len = 1;
320 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
321 sstrncpy (vl.plugin, "powerdns", sizeof (vl.plugin));
322 sstrncpy (vl.type, type, sizeof (vl.type));
323 if (type_instance != NULL)
324 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
325 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
327 plugin_dispatch_values (&vl);
328 } /* }}} static void submit */
330 static int powerdns_get_data_dgram (list_item_t *item, /* {{{ */
331 char **ret_buffer,
332 size_t *ret_buffer_size)
333 {
334 int sd;
335 int status;
337 char temp[4096];
338 char *buffer = NULL;
339 size_t buffer_size = 0;
341 struct sockaddr_un sa_unix;
343 sd = socket (PF_UNIX, item->socktype, 0);
344 if (sd < 0)
345 {
346 FUNC_ERROR ("socket");
347 return (-1);
348 }
350 memset (&sa_unix, 0, sizeof (sa_unix));
351 sa_unix.sun_family = AF_UNIX;
352 sstrncpy (sa_unix.sun_path,
353 (local_sockpath != NULL) ? local_sockpath : PDNS_LOCAL_SOCKPATH,
354 sizeof (sa_unix.sun_path));
356 status = unlink (sa_unix.sun_path);
357 if ((status != 0) && (errno != ENOENT))
358 {
359 FUNC_ERROR ("unlink");
360 close (sd);
361 return (-1);
362 }
364 do /* while (0) */
365 {
366 /* We need to bind to a specific path, because this is a datagram socket
367 * and otherwise the daemon cannot answer. */
368 status = bind (sd, (struct sockaddr *) &sa_unix, sizeof (sa_unix));
369 if (status != 0)
370 {
371 FUNC_ERROR ("bind");
372 break;
373 }
375 /* Make the socket writeable by the daemon.. */
376 status = chmod (sa_unix.sun_path, 0666);
377 if (status != 0)
378 {
379 FUNC_ERROR ("chmod");
380 break;
381 }
383 struct timeval timeout;
384 timeout.tv_sec=2;
385 if (timeout.tv_sec < interval_g * 3 / 4)
386 timeout.tv_sec = interval_g * 3 / 4;
387 timeout.tv_usec=0;
388 status = setsockopt (sd, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof (timeout));
389 if (status != 0)
390 {
391 FUNC_ERROR ("setsockopt");
392 break;
393 }
395 status = connect (sd, (struct sockaddr *) &item->sockaddr,
396 sizeof (item->sockaddr));
397 if (status != 0)
398 {
399 FUNC_ERROR ("connect");
400 break;
401 }
403 status = send (sd, item->command, strlen (item->command), 0);
404 if (status < 0)
405 {
406 FUNC_ERROR ("send");
407 break;
408 }
410 status = recv (sd, temp, sizeof (temp), /* flags = */ 0);
411 if (status < 0)
412 {
413 FUNC_ERROR ("recv");
414 break;
415 }
416 buffer_size = status + 1;
417 status = 0;
418 } while (0);
420 close (sd);
421 unlink (sa_unix.sun_path);
423 if (status != 0)
424 return (-1);
426 assert (buffer_size > 0);
427 buffer = (char *) malloc (buffer_size);
428 if (buffer == NULL)
429 {
430 FUNC_ERROR ("malloc");
431 return (-1);
432 }
434 memcpy (buffer, temp, buffer_size - 1);
435 buffer[buffer_size - 1] = 0;
437 *ret_buffer = buffer;
438 *ret_buffer_size = buffer_size;
440 return (0);
441 } /* }}} int powerdns_get_data_dgram */
443 static int powerdns_get_data_stream (list_item_t *item, /* {{{ */
444 char **ret_buffer,
445 size_t *ret_buffer_size)
446 {
447 int sd;
448 int status;
450 char temp[4096];
451 char *buffer = NULL;
452 size_t buffer_size = 0;
454 sd = socket (PF_UNIX, item->socktype, 0);
455 if (sd < 0)
456 {
457 FUNC_ERROR ("socket");
458 return (-1);
459 }
461 status = connect (sd, (struct sockaddr *) &item->sockaddr,
462 sizeof (item->sockaddr));
463 if (status != 0)
464 {
465 FUNC_ERROR ("connect");
466 close (sd);
467 return (-1);
468 }
470 /* strlen + 1, because we need to send the terminating NULL byte, too. */
471 status = send (sd, item->command, strlen (item->command) + 1,
472 /* flags = */ 0);
473 if (status < 0)
474 {
475 FUNC_ERROR ("send");
476 close (sd);
477 return (-1);
478 }
480 while (42)
481 {
482 char *buffer_new;
484 status = recv (sd, temp, sizeof (temp), /* flags = */ 0);
485 if (status < 0)
486 {
487 FUNC_ERROR ("recv");
488 break;
489 }
490 else if (status == 0)
491 break;
493 buffer_new = (char *) realloc (buffer, buffer_size + status + 1);
494 if (buffer_new == NULL)
495 {
496 FUNC_ERROR ("realloc");
497 status = -1;
498 break;
499 }
500 buffer = buffer_new;
502 memcpy (buffer + buffer_size, temp, status);
503 buffer_size += status;
504 buffer[buffer_size] = 0;
505 } /* while (42) */
506 close (sd);
507 sd = -1;
509 if (status < 0)
510 {
511 sfree (buffer);
512 }
513 else
514 {
515 assert (status == 0);
516 *ret_buffer = buffer;
517 *ret_buffer_size = buffer_size;
518 }
520 return (status);
521 } /* }}} int powerdns_get_data_stream */
523 static int powerdns_get_data (list_item_t *item, char **ret_buffer,
524 size_t *ret_buffer_size)
525 {
526 if (item->socktype == SOCK_DGRAM)
527 return (powerdns_get_data_dgram (item, ret_buffer, ret_buffer_size));
528 else if (item->socktype == SOCK_STREAM)
529 return (powerdns_get_data_stream (item, ret_buffer, ret_buffer_size));
530 else
531 {
532 ERROR ("powerdns plugin: Unknown socket type: %i", (int) item->socktype);
533 return (-1);
534 }
535 } /* int powerdns_get_data */
537 static int powerdns_read_server (list_item_t *item) /* {{{ */
538 {
539 char *buffer = NULL;
540 size_t buffer_size = 0;
541 int status;
543 char *dummy;
544 char *saveptr;
546 char *key;
547 char *value;
549 const char* const *fields;
550 int fields_num;
552 if (item->command == NULL)
553 item->command = strdup ("SHOW *");
554 if (item->command == NULL)
555 {
556 ERROR ("powerdns plugin: strdup failed.");
557 return (-1);
558 }
560 status = powerdns_get_data (item, &buffer, &buffer_size);
561 if (status != 0)
562 return (-1);
564 if (item->fields_num != 0)
565 {
566 fields = (const char* const *) item->fields;
567 fields_num = item->fields_num;
568 }
569 else
570 {
571 fields = default_server_fields;
572 fields_num = default_server_fields_num;
573 }
575 assert (fields != NULL);
576 assert (fields_num > 0);
578 /* corrupt-packets=0,deferred-cache-inserts=0,deferred-cache-lookup=0,latency=0,packetcache-hit=0,packetcache-miss=0,packetcache-size=0,qsize-q=0,query-cache-hit=0,query-cache-miss=0,recursing-answers=0,recursing-questions=0,servfail-packets=0,tcp-answers=0,tcp-queries=0,timedout-packets=0,udp-answers=0,udp-queries=0,udp4-answers=0,udp4-queries=0,udp6-answers=0,udp6-queries=0, */
579 dummy = buffer;
580 saveptr = NULL;
581 while ((key = strtok_r (dummy, ",", &saveptr)) != NULL)
582 {
583 int i;
585 dummy = NULL;
587 value = strchr (key, '=');
588 if (value == NULL)
589 break;
591 *value = '\0';
592 value++;
594 if (value[0] == '\0')
595 continue;
597 /* Check if this item was requested. */
598 for (i = 0; i < fields_num; i++)
599 if (strcasecmp (key, fields[i]) == 0)
600 break;
601 if (i >= fields_num)
602 continue;
604 submit (item->instance, key, value);
605 } /* while (strtok_r) */
607 sfree (buffer);
609 return (0);
610 } /* }}} int powerdns_read_server */
612 /*
613 * powerdns_update_recursor_command
614 *
615 * Creates a string that holds the command to be sent to the recursor. This
616 * string is stores in the `command' member of the `list_item_t' passed to the
617 * function. This function is called by `powerdns_read_recursor'.
618 */
619 static int powerdns_update_recursor_command (list_item_t *li) /* {{{ */
620 {
621 char buffer[4096];
622 int status;
624 if (li == NULL)
625 return (0);
627 if (li->fields_num < 1)
628 {
629 sstrncpy (buffer, RECURSOR_COMMAND, sizeof (buffer));
630 }
631 else
632 {
633 sstrncpy (buffer, "get ", sizeof (buffer));
634 status = strjoin (&buffer[4], sizeof (buffer) - strlen ("get "),
635 li->fields, li->fields_num,
636 /* seperator = */ " ");
637 if (status < 0)
638 {
639 ERROR ("powerdns plugin: strjoin failed.");
640 return (-1);
641 }
642 }
644 buffer[sizeof (buffer) - 1] = 0;
645 li->command = strdup (buffer);
646 if (li->command == NULL)
647 {
648 ERROR ("powerdns plugin: strdup failed.");
649 return (-1);
650 }
652 return (0);
653 } /* }}} int powerdns_update_recursor_command */
655 static int powerdns_read_recursor (list_item_t *item) /* {{{ */
656 {
657 char *buffer = NULL;
658 size_t buffer_size = 0;
659 int status;
661 char *dummy;
663 char *keys_list;
664 char *key;
665 char *key_saveptr;
666 char *value;
667 char *value_saveptr;
669 if (item->command == NULL)
670 {
671 status = powerdns_update_recursor_command (item);
672 if (status != 0)
673 {
674 ERROR ("powerdns plugin: powerdns_update_recursor_command failed.");
675 return (-1);
676 }
678 DEBUG ("powerdns plugin: powerdns_read_recursor: item->command = %s;",
679 item->command);
680 }
681 assert (item->command != NULL);
683 status = powerdns_get_data (item, &buffer, &buffer_size);
684 if (status != 0)
685 {
686 ERROR ("powerdns plugin: powerdns_get_data failed.");
687 return (-1);
688 }
690 keys_list = strdup (item->command);
691 if (keys_list == NULL)
692 {
693 FUNC_ERROR ("strdup");
694 sfree (buffer);
695 return (-1);
696 }
698 key_saveptr = NULL;
699 value_saveptr = NULL;
701 /* Skip the `get' at the beginning */
702 strtok_r (keys_list, " \t", &key_saveptr);
704 dummy = buffer;
705 while ((value = strtok_r (dummy, " \t\n\r", &value_saveptr)) != NULL)
706 {
707 dummy = NULL;
709 key = strtok_r (NULL, " \t", &key_saveptr);
710 if (key == NULL)
711 break;
713 submit (item->instance, key, value);
714 } /* while (strtok_r) */
716 sfree (buffer);
717 sfree (keys_list);
719 return (0);
720 } /* }}} int powerdns_read_recursor */
722 static int powerdns_config_add_string (const char *name, /* {{{ */
723 char **dest,
724 oconfig_item_t *ci)
725 {
726 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
727 {
728 WARNING ("powerdns plugin: `%s' needs exactly one string argument.",
729 name);
730 return (-1);
731 }
733 sfree (*dest);
734 *dest = strdup (ci->values[0].value.string);
735 if (*dest == NULL)
736 return (-1);
738 return (0);
739 } /* }}} int powerdns_config_add_string */
741 static int powerdns_config_add_collect (list_item_t *li, /* {{{ */
742 oconfig_item_t *ci)
743 {
744 int i;
745 char **temp;
747 if (ci->values_num < 1)
748 {
749 WARNING ("powerdns plugin: The `Collect' option needs "
750 "at least one argument.");
751 return (-1);
752 }
754 for (i = 0; i < ci->values_num; i++)
755 if (ci->values[i].type != OCONFIG_TYPE_STRING)
756 {
757 WARNING ("powerdns plugin: Only string arguments are allowed to "
758 "the `Collect' option.");
759 return (-1);
760 }
762 temp = (char **) realloc (li->fields,
763 sizeof (char *) * (li->fields_num + ci->values_num));
764 if (temp == NULL)
765 {
766 WARNING ("powerdns plugin: realloc failed.");
767 return (-1);
768 }
769 li->fields = temp;
771 for (i = 0; i < ci->values_num; i++)
772 {
773 li->fields[li->fields_num] = strdup (ci->values[i].value.string);
774 if (li->fields[li->fields_num] == NULL)
775 {
776 WARNING ("powerdns plugin: strdup failed.");
777 continue;
778 }
779 li->fields_num++;
780 }
782 /* Invalidate a previously computed command */
783 sfree (li->command);
785 return (0);
786 } /* }}} int powerdns_config_add_collect */
788 static int powerdns_config_add_server (oconfig_item_t *ci) /* {{{ */
789 {
790 char *socket_temp;
792 list_item_t *item;
793 int status;
794 int i;
796 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
797 {
798 WARNING ("powerdns plugin: `%s' needs exactly one string argument.",
799 ci->key);
800 return (-1);
801 }
803 item = (list_item_t *) malloc (sizeof (list_item_t));
804 if (item == NULL)
805 {
806 ERROR ("powerdns plugin: malloc failed.");
807 return (-1);
808 }
809 memset (item, '\0', sizeof (list_item_t));
811 item->instance = strdup (ci->values[0].value.string);
812 if (item->instance == NULL)
813 {
814 ERROR ("powerdns plugin: strdup failed.");
815 sfree (item);
816 return (-1);
817 }
819 /*
820 * Set default values for the members of list_item_t
821 */
822 if (strcasecmp ("Server", ci->key) == 0)
823 {
824 item->server_type = SRV_AUTHORITATIVE;
825 item->func = powerdns_read_server;
826 item->socktype = SOCK_STREAM;
827 socket_temp = strdup (SERVER_SOCKET);
828 }
829 else if (strcasecmp ("Recursor", ci->key) == 0)
830 {
831 item->server_type = SRV_RECURSOR;
832 item->func = powerdns_read_recursor;
833 item->socktype = SOCK_DGRAM;
834 socket_temp = strdup (RECURSOR_SOCKET);
835 }
836 else
837 {
838 /* We must never get here.. */
839 assert (0);
840 return (-1);
841 }
843 status = 0;
844 for (i = 0; i < ci->children_num; i++)
845 {
846 oconfig_item_t *option = ci->children + i;
848 if (strcasecmp ("Collect", option->key) == 0)
849 status = powerdns_config_add_collect (item, option);
850 else if (strcasecmp ("Socket", option->key) == 0)
851 status = powerdns_config_add_string ("Socket", &socket_temp, option);
852 else
853 {
854 ERROR ("powerdns plugin: Option `%s' not allowed here.", option->key);
855 status = -1;
856 }
858 if (status != 0)
859 break;
860 }
862 while (status == 0)
863 {
864 llentry_t *e;
866 if (socket_temp == NULL)
867 {
868 ERROR ("powerdns plugin: socket_temp == NULL.");
869 status = -1;
870 break;
871 }
873 item->sockaddr.sun_family = AF_UNIX;
874 sstrncpy (item->sockaddr.sun_path, socket_temp,
875 sizeof (item->sockaddr.sun_path));
877 e = llentry_create (item->instance, item);
878 if (e == NULL)
879 {
880 ERROR ("powerdns plugin: llentry_create failed.");
881 status = -1;
882 break;
883 }
884 llist_append (list, e);
886 break;
887 }
889 if (status != 0)
890 {
891 sfree (item);
892 return (-1);
893 }
895 DEBUG ("powerdns plugin: Add server: instance = %s;", item->instance);
897 return (0);
898 } /* }}} int powerdns_config_add_server */
900 static int powerdns_config (oconfig_item_t *ci) /* {{{ */
901 {
902 int i;
904 DEBUG ("powerdns plugin: powerdns_config (ci = %p);", (void *) ci);
906 if (list == NULL)
907 {
908 list = llist_create ();
910 if (list == NULL)
911 {
912 ERROR ("powerdns plugin: `llist_create' failed.");
913 return (-1);
914 }
915 }
917 for (i = 0; i < ci->children_num; i++)
918 {
919 oconfig_item_t *option = ci->children + i;
921 if ((strcasecmp ("Server", option->key) == 0)
922 || (strcasecmp ("Recursor", option->key) == 0))
923 powerdns_config_add_server (option);
924 else if (strcasecmp ("LocalSocket", option->key) == 0)
925 {
926 char *temp = strdup (option->key);
927 if (temp == NULL)
928 return (1);
929 sfree (local_sockpath);
930 local_sockpath = temp;
931 }
932 else
933 {
934 ERROR ("powerdns plugin: Option `%s' not allowed here.", option->key);
935 }
936 } /* for (i = 0; i < ci->children_num; i++) */
938 return (0);
939 } /* }}} int powerdns_config */
941 static int powerdns_read (void)
942 {
943 llentry_t *e;
945 for (e = llist_head (list); e != NULL; e = e->next)
946 {
947 list_item_t *item = e->value;
948 item->func (item);
949 }
951 return (0);
952 } /* static int powerdns_read */
954 static int powerdns_shutdown (void)
955 {
956 llentry_t *e;
958 if (list == NULL)
959 return (0);
961 for (e = llist_head (list); e != NULL; e = e->next)
962 {
963 list_item_t *item = (list_item_t *) e->value;
964 e->value = NULL;
966 sfree (item->instance);
967 sfree (item->command);
968 sfree (item);
969 }
971 llist_destroy (list);
972 list = NULL;
974 return (0);
975 } /* static int powerdns_shutdown */
977 void module_register (void)
978 {
979 plugin_register_complex_config ("powerdns", powerdns_config);
980 plugin_register_read ("powerdns", powerdns_read);
981 plugin_register_shutdown ("powerdns", powerdns_shutdown );
982 } /* void module_register */
984 /* vim: set sw=2 sts=2 ts=8 fdm=marker : */