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", "ipt_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", "ipt_packets", "servfail"},
173 {"timedout-packets", "ipt_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 (0 != parse_value (value, &values[0], ds->ds[0].type))
293 {
294 ERROR ("powerdns plugin: Cannot convert `%s' "
295 "to a number.", value);
296 return;
297 }
299 vl.values = values;
300 vl.values_len = 1;
301 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
302 sstrncpy (vl.plugin, "powerdns", sizeof (vl.plugin));
303 sstrncpy (vl.type, type, sizeof (vl.type));
304 if (type_instance != NULL)
305 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
306 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
308 plugin_dispatch_values (&vl);
309 } /* }}} static void submit */
311 static int powerdns_get_data_dgram (list_item_t *item, /* {{{ */
312 char **ret_buffer,
313 size_t *ret_buffer_size)
314 {
315 int sd;
316 int status;
318 char temp[4096];
319 char *buffer = NULL;
320 size_t buffer_size = 0;
322 struct sockaddr_un sa_unix;
324 sd = socket (PF_UNIX, item->socktype, 0);
325 if (sd < 0)
326 {
327 FUNC_ERROR ("socket");
328 return (-1);
329 }
331 memset (&sa_unix, 0, sizeof (sa_unix));
332 sa_unix.sun_family = AF_UNIX;
333 sstrncpy (sa_unix.sun_path,
334 (local_sockpath != NULL) ? local_sockpath : PDNS_LOCAL_SOCKPATH,
335 sizeof (sa_unix.sun_path));
337 status = unlink (sa_unix.sun_path);
338 if ((status != 0) && (errno != ENOENT))
339 {
340 FUNC_ERROR ("unlink");
341 close (sd);
342 return (-1);
343 }
345 do /* while (0) */
346 {
347 /* We need to bind to a specific path, because this is a datagram socket
348 * and otherwise the daemon cannot answer. */
349 status = bind (sd, (struct sockaddr *) &sa_unix, sizeof (sa_unix));
350 if (status != 0)
351 {
352 FUNC_ERROR ("bind");
353 break;
354 }
356 /* Make the socket writeable by the daemon.. */
357 status = chmod (sa_unix.sun_path, 0666);
358 if (status != 0)
359 {
360 FUNC_ERROR ("chmod");
361 break;
362 }
364 struct timeval timeout;
365 timeout.tv_sec=2;
366 if (timeout.tv_sec < interval_g * 3 / 4)
367 timeout.tv_sec = interval_g * 3 / 4;
368 timeout.tv_usec=0;
369 status = setsockopt (sd, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof (timeout));
370 if (status != 0)
371 {
372 FUNC_ERROR ("setsockopt");
373 break;
374 }
376 status = connect (sd, (struct sockaddr *) &item->sockaddr,
377 sizeof (item->sockaddr));
378 if (status != 0)
379 {
380 FUNC_ERROR ("connect");
381 break;
382 }
384 status = send (sd, item->command, strlen (item->command), 0);
385 if (status < 0)
386 {
387 FUNC_ERROR ("send");
388 break;
389 }
391 status = recv (sd, temp, sizeof (temp), /* flags = */ 0);
392 if (status < 0)
393 {
394 FUNC_ERROR ("recv");
395 break;
396 }
397 buffer_size = status + 1;
398 status = 0;
399 } while (0);
401 close (sd);
402 unlink (sa_unix.sun_path);
404 if (status != 0)
405 return (-1);
407 assert (buffer_size > 0);
408 buffer = (char *) malloc (buffer_size);
409 if (buffer == NULL)
410 {
411 FUNC_ERROR ("malloc");
412 return (-1);
413 }
415 memcpy (buffer, temp, buffer_size - 1);
416 buffer[buffer_size - 1] = 0;
418 *ret_buffer = buffer;
419 *ret_buffer_size = buffer_size;
421 return (0);
422 } /* }}} int powerdns_get_data_dgram */
424 static int powerdns_get_data_stream (list_item_t *item, /* {{{ */
425 char **ret_buffer,
426 size_t *ret_buffer_size)
427 {
428 int sd;
429 int status;
431 char temp[4096];
432 char *buffer = NULL;
433 size_t buffer_size = 0;
435 sd = socket (PF_UNIX, item->socktype, 0);
436 if (sd < 0)
437 {
438 FUNC_ERROR ("socket");
439 return (-1);
440 }
442 status = connect (sd, (struct sockaddr *) &item->sockaddr,
443 sizeof (item->sockaddr));
444 if (status != 0)
445 {
446 FUNC_ERROR ("connect");
447 close (sd);
448 return (-1);
449 }
451 /* strlen + 1, because we need to send the terminating NULL byte, too. */
452 status = send (sd, item->command, strlen (item->command) + 1,
453 /* flags = */ 0);
454 if (status < 0)
455 {
456 FUNC_ERROR ("send");
457 close (sd);
458 return (-1);
459 }
461 while (42)
462 {
463 char *buffer_new;
465 status = recv (sd, temp, sizeof (temp), /* flags = */ 0);
466 if (status < 0)
467 {
468 FUNC_ERROR ("recv");
469 break;
470 }
471 else if (status == 0)
472 break;
474 buffer_new = (char *) realloc (buffer, buffer_size + status + 1);
475 if (buffer_new == NULL)
476 {
477 FUNC_ERROR ("realloc");
478 status = -1;
479 break;
480 }
481 buffer = buffer_new;
483 memcpy (buffer + buffer_size, temp, status);
484 buffer_size += status;
485 buffer[buffer_size] = 0;
486 } /* while (42) */
487 close (sd);
488 sd = -1;
490 if (status < 0)
491 {
492 sfree (buffer);
493 }
494 else
495 {
496 assert (status == 0);
497 *ret_buffer = buffer;
498 *ret_buffer_size = buffer_size;
499 }
501 return (status);
502 } /* }}} int powerdns_get_data_stream */
504 static int powerdns_get_data (list_item_t *item, char **ret_buffer,
505 size_t *ret_buffer_size)
506 {
507 if (item->socktype == SOCK_DGRAM)
508 return (powerdns_get_data_dgram (item, ret_buffer, ret_buffer_size));
509 else if (item->socktype == SOCK_STREAM)
510 return (powerdns_get_data_stream (item, ret_buffer, ret_buffer_size));
511 else
512 {
513 ERROR ("powerdns plugin: Unknown socket type: %i", (int) item->socktype);
514 return (-1);
515 }
516 } /* int powerdns_get_data */
518 static int powerdns_read_server (list_item_t *item) /* {{{ */
519 {
520 char *buffer = NULL;
521 size_t buffer_size = 0;
522 int status;
524 char *dummy;
525 char *saveptr;
527 char *key;
528 char *value;
530 const char* const *fields;
531 int fields_num;
533 if (item->command == NULL)
534 item->command = strdup ("SHOW *");
535 if (item->command == NULL)
536 {
537 ERROR ("powerdns plugin: strdup failed.");
538 return (-1);
539 }
541 status = powerdns_get_data (item, &buffer, &buffer_size);
542 if (status != 0)
543 return (-1);
545 if (item->fields_num != 0)
546 {
547 fields = (const char* const *) item->fields;
548 fields_num = item->fields_num;
549 }
550 else
551 {
552 fields = default_server_fields;
553 fields_num = default_server_fields_num;
554 }
556 assert (fields != NULL);
557 assert (fields_num > 0);
559 /* 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, */
560 dummy = buffer;
561 saveptr = NULL;
562 while ((key = strtok_r (dummy, ",", &saveptr)) != NULL)
563 {
564 int i;
566 dummy = NULL;
568 value = strchr (key, '=');
569 if (value == NULL)
570 break;
572 *value = '\0';
573 value++;
575 if (value[0] == '\0')
576 continue;
578 /* Check if this item was requested. */
579 for (i = 0; i < fields_num; i++)
580 if (strcasecmp (key, fields[i]) == 0)
581 break;
582 if (i >= fields_num)
583 continue;
585 submit (item->instance, key, value);
586 } /* while (strtok_r) */
588 sfree (buffer);
590 return (0);
591 } /* }}} int powerdns_read_server */
593 /*
594 * powerdns_update_recursor_command
595 *
596 * Creates a string that holds the command to be sent to the recursor. This
597 * string is stores in the `command' member of the `list_item_t' passed to the
598 * function. This function is called by `powerdns_read_recursor'.
599 */
600 static int powerdns_update_recursor_command (list_item_t *li) /* {{{ */
601 {
602 char buffer[4096];
603 int status;
605 if (li == NULL)
606 return (0);
608 if (li->fields_num < 1)
609 {
610 sstrncpy (buffer, RECURSOR_COMMAND, sizeof (buffer));
611 }
612 else
613 {
614 sstrncpy (buffer, "get ", sizeof (buffer));
615 status = strjoin (&buffer[4], sizeof (buffer) - strlen ("get "),
616 li->fields, li->fields_num,
617 /* seperator = */ " ");
618 if (status < 0)
619 {
620 ERROR ("powerdns plugin: strjoin failed.");
621 return (-1);
622 }
623 }
625 buffer[sizeof (buffer) - 1] = 0;
626 li->command = strdup (buffer);
627 if (li->command == NULL)
628 {
629 ERROR ("powerdns plugin: strdup failed.");
630 return (-1);
631 }
633 return (0);
634 } /* }}} int powerdns_update_recursor_command */
636 static int powerdns_read_recursor (list_item_t *item) /* {{{ */
637 {
638 char *buffer = NULL;
639 size_t buffer_size = 0;
640 int status;
642 char *dummy;
644 char *keys_list;
645 char *key;
646 char *key_saveptr;
647 char *value;
648 char *value_saveptr;
650 if (item->command == NULL)
651 {
652 status = powerdns_update_recursor_command (item);
653 if (status != 0)
654 {
655 ERROR ("powerdns plugin: powerdns_update_recursor_command failed.");
656 return (-1);
657 }
659 DEBUG ("powerdns plugin: powerdns_read_recursor: item->command = %s;",
660 item->command);
661 }
662 assert (item->command != NULL);
664 status = powerdns_get_data (item, &buffer, &buffer_size);
665 if (status != 0)
666 {
667 ERROR ("powerdns plugin: powerdns_get_data failed.");
668 return (-1);
669 }
671 keys_list = strdup (item->command);
672 if (keys_list == NULL)
673 {
674 FUNC_ERROR ("strdup");
675 sfree (buffer);
676 return (-1);
677 }
679 key_saveptr = NULL;
680 value_saveptr = NULL;
682 /* Skip the `get' at the beginning */
683 strtok_r (keys_list, " \t", &key_saveptr);
685 dummy = buffer;
686 while ((value = strtok_r (dummy, " \t\n\r", &value_saveptr)) != NULL)
687 {
688 dummy = NULL;
690 key = strtok_r (NULL, " \t", &key_saveptr);
691 if (key == NULL)
692 break;
694 submit (item->instance, key, value);
695 } /* while (strtok_r) */
697 sfree (buffer);
698 sfree (keys_list);
700 return (0);
701 } /* }}} int powerdns_read_recursor */
703 static int powerdns_config_add_string (const char *name, /* {{{ */
704 char **dest,
705 oconfig_item_t *ci)
706 {
707 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
708 {
709 WARNING ("powerdns plugin: `%s' needs exactly one string argument.",
710 name);
711 return (-1);
712 }
714 sfree (*dest);
715 *dest = strdup (ci->values[0].value.string);
716 if (*dest == NULL)
717 return (-1);
719 return (0);
720 } /* }}} int powerdns_config_add_string */
722 static int powerdns_config_add_collect (list_item_t *li, /* {{{ */
723 oconfig_item_t *ci)
724 {
725 int i;
726 char **temp;
728 if (ci->values_num < 1)
729 {
730 WARNING ("powerdns plugin: The `Collect' option needs "
731 "at least one argument.");
732 return (-1);
733 }
735 for (i = 0; i < ci->values_num; i++)
736 if (ci->values[i].type != OCONFIG_TYPE_STRING)
737 {
738 WARNING ("powerdns plugin: Only string arguments are allowed to "
739 "the `Collect' option.");
740 return (-1);
741 }
743 temp = (char **) realloc (li->fields,
744 sizeof (char *) * (li->fields_num + ci->values_num));
745 if (temp == NULL)
746 {
747 WARNING ("powerdns plugin: realloc failed.");
748 return (-1);
749 }
750 li->fields = temp;
752 for (i = 0; i < ci->values_num; i++)
753 {
754 li->fields[li->fields_num] = strdup (ci->values[i].value.string);
755 if (li->fields[li->fields_num] == NULL)
756 {
757 WARNING ("powerdns plugin: strdup failed.");
758 continue;
759 }
760 li->fields_num++;
761 }
763 /* Invalidate a previously computed command */
764 sfree (li->command);
766 return (0);
767 } /* }}} int powerdns_config_add_collect */
769 static int powerdns_config_add_server (oconfig_item_t *ci) /* {{{ */
770 {
771 char *socket_temp;
773 list_item_t *item;
774 int status;
775 int i;
777 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
778 {
779 WARNING ("powerdns plugin: `%s' needs exactly one string argument.",
780 ci->key);
781 return (-1);
782 }
784 item = (list_item_t *) malloc (sizeof (list_item_t));
785 if (item == NULL)
786 {
787 ERROR ("powerdns plugin: malloc failed.");
788 return (-1);
789 }
790 memset (item, '\0', sizeof (list_item_t));
792 item->instance = strdup (ci->values[0].value.string);
793 if (item->instance == NULL)
794 {
795 ERROR ("powerdns plugin: strdup failed.");
796 sfree (item);
797 return (-1);
798 }
800 /*
801 * Set default values for the members of list_item_t
802 */
803 if (strcasecmp ("Server", ci->key) == 0)
804 {
805 item->server_type = SRV_AUTHORITATIVE;
806 item->func = powerdns_read_server;
807 item->socktype = SOCK_STREAM;
808 socket_temp = strdup (SERVER_SOCKET);
809 }
810 else if (strcasecmp ("Recursor", ci->key) == 0)
811 {
812 item->server_type = SRV_RECURSOR;
813 item->func = powerdns_read_recursor;
814 item->socktype = SOCK_DGRAM;
815 socket_temp = strdup (RECURSOR_SOCKET);
816 }
817 else
818 {
819 /* We must never get here.. */
820 assert (0);
821 return (-1);
822 }
824 status = 0;
825 for (i = 0; i < ci->children_num; i++)
826 {
827 oconfig_item_t *option = ci->children + i;
829 if (strcasecmp ("Collect", option->key) == 0)
830 status = powerdns_config_add_collect (item, option);
831 else if (strcasecmp ("Socket", option->key) == 0)
832 status = powerdns_config_add_string ("Socket", &socket_temp, option);
833 else
834 {
835 ERROR ("powerdns plugin: Option `%s' not allowed here.", option->key);
836 status = -1;
837 }
839 if (status != 0)
840 break;
841 }
843 while (status == 0)
844 {
845 llentry_t *e;
847 if (socket_temp == NULL)
848 {
849 ERROR ("powerdns plugin: socket_temp == NULL.");
850 status = -1;
851 break;
852 }
854 item->sockaddr.sun_family = AF_UNIX;
855 sstrncpy (item->sockaddr.sun_path, socket_temp,
856 sizeof (item->sockaddr.sun_path));
858 e = llentry_create (item->instance, item);
859 if (e == NULL)
860 {
861 ERROR ("powerdns plugin: llentry_create failed.");
862 status = -1;
863 break;
864 }
865 llist_append (list, e);
867 break;
868 }
870 if (status != 0)
871 {
872 sfree (item);
873 return (-1);
874 }
876 DEBUG ("powerdns plugin: Add server: instance = %s;", item->instance);
878 return (0);
879 } /* }}} int powerdns_config_add_server */
881 static int powerdns_config (oconfig_item_t *ci) /* {{{ */
882 {
883 int i;
885 DEBUG ("powerdns plugin: powerdns_config (ci = %p);", (void *) ci);
887 if (list == NULL)
888 {
889 list = llist_create ();
891 if (list == NULL)
892 {
893 ERROR ("powerdns plugin: `llist_create' failed.");
894 return (-1);
895 }
896 }
898 for (i = 0; i < ci->children_num; i++)
899 {
900 oconfig_item_t *option = ci->children + i;
902 if ((strcasecmp ("Server", option->key) == 0)
903 || (strcasecmp ("Recursor", option->key) == 0))
904 powerdns_config_add_server (option);
905 else if (strcasecmp ("LocalSocket", option->key) == 0)
906 {
907 if ((option->values_num != 1) || (option->values[0].type != OCONFIG_TYPE_STRING))
908 {
909 WARNING ("powerdns plugin: `%s' needs exactly one string argument.", option->key);
910 }
911 else
912 {
913 char *temp = strdup (option->values[0].value.string);
914 if (temp == NULL)
915 return (1);
916 sfree (local_sockpath);
917 local_sockpath = temp;
918 }
919 }
920 else
921 {
922 ERROR ("powerdns plugin: Option `%s' not allowed here.", option->key);
923 }
924 } /* for (i = 0; i < ci->children_num; i++) */
926 return (0);
927 } /* }}} int powerdns_config */
929 static int powerdns_read (void)
930 {
931 llentry_t *e;
933 for (e = llist_head (list); e != NULL; e = e->next)
934 {
935 list_item_t *item = e->value;
936 item->func (item);
937 }
939 return (0);
940 } /* static int powerdns_read */
942 static int powerdns_shutdown (void)
943 {
944 llentry_t *e;
946 if (list == NULL)
947 return (0);
949 for (e = llist_head (list); e != NULL; e = e->next)
950 {
951 list_item_t *item = (list_item_t *) e->value;
952 e->value = NULL;
954 sfree (item->instance);
955 sfree (item->command);
956 sfree (item);
957 }
959 llist_destroy (list);
960 list = NULL;
962 return (0);
963 } /* static int powerdns_shutdown */
965 void module_register (void)
966 {
967 plugin_register_complex_config ("powerdns", powerdns_config);
968 plugin_register_read ("powerdns", powerdns_read);
969 plugin_register_shutdown ("powerdns", powerdns_shutdown );
970 } /* void module_register */
972 /* vim: set sw=2 sts=2 ts=8 fdm=marker : */