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 collectd.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 * \n"
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\n"
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 millisecond
88 answers100-1000 counts the number of queries answered within 1 second
89 answers10-100 counts the number of queries answered within 100 milliseconds
90 answers1-10 counts the number of queries answered within 10 milliseconds
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"},
150 {"rd-queries", "dns_question", "rd"},
152 /* Answers */
153 {"recursing-answers", "dns_answer", "recurse"},
154 {"tcp-answers", "dns_answer", "tcp"},
155 {"udp-answers", "dns_answer", "udp"},
156 {"recursion-unanswered", "dns_answer", "recursion-unanswered"},
157 {"udp-answers-bytes", "total_bytes", "udp-answers-bytes"},
159 /* Cache stuff */
160 {"packetcache-hit", "cache_result", "packet-hit"},
161 {"packetcache-miss", "cache_result", "packet-miss"},
162 {"packetcache-size", "cache_size", "packet"},
163 {"key-cache-size", "cache_size", "key"},
164 {"meta-cache-size", "cache_size", "meta"},
165 {"signature-cache-size", "cache_size", "signature"},
166 {"query-cache-hit", "cache_result", "query-hit"},
167 {"query-cache-miss", "cache_result", "query-miss"},
169 /* Latency */
170 {"latency", "latency", NULL},
172 /* DNS updates */
173 {"dnsupdate-answers", "dns_answer", "dnsupdate-answer"},
174 {"dnsupdate-changes", "dns_question", "dnsupdate-changes"},
175 {"dnsupdate-queries", "dns_question", "dnsupdate-queries"},
176 {"dnsupdate-refused", "dns_answer", "dnsupdate-refused"},
178 /* Other stuff.. */
179 {"corrupt-packets", "ipt_packets", "corrupt"},
180 {"deferred-cache-inserts", "counter", "cache-deferred_insert"},
181 {"deferred-cache-lookup", "counter", "cache-deferred_lookup"},
182 {"qsize-a", "cache_size", "answers"},
183 {"qsize-q", "cache_size", "questions"},
184 {"servfail-packets", "ipt_packets", "servfail"},
185 {"timedout-packets", "ipt_packets", "timeout"},
186 {"udp4-answers", "dns_answer", "udp4"},
187 {"udp4-queries", "dns_question", "queries-udp4"},
188 {"udp6-answers", "dns_answer", "udp6"},
189 {"udp6-queries", "dns_question", "queries-udp6"},
190 {"security-status", "dns_question", "security-status"},
191 {"udp-do-queries", "dns_question", "udp-do_queries"},
192 {"signatures", "counter", "signatures"},
194 /***********************
195 * Recursor statistics *
196 ***********************/
197 /* Answers by return code */
198 {"noerror-answers", "dns_rcode", "NOERROR"},
199 {"nxdomain-answers", "dns_rcode", "NXDOMAIN"},
200 {"servfail-answers", "dns_rcode", "SERVFAIL"},
202 /* CPU utilization */
203 {"sys-msec", "cpu", "system"},
204 {"user-msec", "cpu", "user"},
206 /* Question-to-answer latency */
207 {"qa-latency", "latency", NULL},
209 /* Cache */
210 {"cache-entries", "cache_size", NULL},
211 {"cache-hits", "cache_result", "hit"},
212 {"cache-misses", "cache_result", "miss"},
214 /* Total number of questions.. */
215 {"questions", "dns_qtype", "total"},
217 /* All the other stuff.. */
218 {"all-outqueries", "dns_question", "outgoing"},
219 {"answers0-1", "dns_answer", "0_1"},
220 {"answers1-10", "dns_answer", "1_10"},
221 {"answers10-100", "dns_answer", "10_100"},
222 {"answers100-1000", "dns_answer", "100_1000"},
223 {"answers-slow", "dns_answer", "slow"},
224 {"chain-resends", "dns_question", "chained"},
225 {"client-parse-errors", "counter", "drops-client_parse_error"},
226 {"concurrent-queries", "dns_question", "concurrent"},
227 {"dlg-only-drops", "counter", "drops-delegation_only"},
228 {"negcache-entries", "cache_size", "negative"},
229 {"nsspeeds-entries", "gauge", "entries-ns_speeds"},
230 {"nsset-invalidations", "counter", "ns_set_invalidation"},
231 {"outgoing-timeouts", "counter", "drops-timeout_outgoing"},
232 {"resource-limits", "counter", "drops-resource_limit"},
233 {"server-parse-errors", "counter", "drops-server_parse_error"},
234 {"spoof-prevents", "counter", "drops-spoofed"},
235 {"tcp-client-overflow", "counter", "denied-client_overflow_tcp"},
236 {"tcp-outqueries", "dns_question", "outgoing-tcp"},
237 {"tcp-questions", "dns_question", "incoming-tcp"},
238 {"throttled-out", "dns_question", "outgoing-throttled"},
239 {"throttle-entries", "gauge", "entries-throttle"},
240 {"unauthorized-tcp", "counter", "denied-unauthorized_tcp"},
241 {"unauthorized-udp", "counter", "denied-unauthorized_udp"},
242 {"unexpected-packets", "dns_answer", "unexpected"},
243 {"uptime", "uptime", NULL}
244 }; /* }}} */
245 int lookup_table_length = STATIC_ARRAY_SIZE (lookup_table);
247 static llist_t *list = NULL;
249 #define PDNS_LOCAL_SOCKPATH LOCALSTATEDIR"/run/"PACKAGE_NAME"-powerdns"
250 static char *local_sockpath = NULL;
252 /* TODO: Do this before 4.4:
253 * - Recursor:
254 * - Complete list of known pdns -> collectd mappings.
255 * - Update the collectd.conf(5) manpage.
256 *
257 * -octo
258 */
260 /* <http://doc.powerdns.com/recursor-stats.html> */
261 static void submit (const char *plugin_instance, /* {{{ */
262 const char *pdns_type, const char *value)
263 {
264 value_list_t vl = VALUE_LIST_INIT;
265 value_t values[1];
267 const char *type = NULL;
268 const char *type_instance = NULL;
269 const data_set_t *ds;
271 int i;
273 for (i = 0; i < lookup_table_length; i++)
274 if (strcmp (lookup_table[i].name, pdns_type) == 0)
275 break;
277 if (i >= lookup_table_length)
278 {
279 INFO ("powerdns plugin: submit: Not found in lookup table: %s = %s;",
280 pdns_type, value);
281 return;
282 }
284 if (lookup_table[i].type == NULL)
285 return;
287 type = lookup_table[i].type;
288 type_instance = lookup_table[i].type_instance;
290 ds = plugin_get_ds (type);
291 if (ds == NULL)
292 {
293 ERROR ("powerdns plugin: The lookup table returned type `%s', "
294 "but I cannot find it via `plugin_get_ds'.",
295 type);
296 return;
297 }
299 if (ds->ds_num != 1)
300 {
301 ERROR ("powerdns plugin: type `%s' has %i data sources, "
302 "but I can only handle one.",
303 type, ds->ds_num);
304 return;
305 }
307 if (0 != parse_value (value, &values[0], ds->ds[0].type))
308 {
309 ERROR ("powerdns plugin: Cannot convert `%s' "
310 "to a number.", value);
311 return;
312 }
314 vl.values = values;
315 vl.values_len = 1;
316 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
317 sstrncpy (vl.plugin, "powerdns", sizeof (vl.plugin));
318 sstrncpy (vl.type, type, sizeof (vl.type));
319 if (type_instance != NULL)
320 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
321 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
323 plugin_dispatch_values (&vl);
324 } /* }}} static void submit */
326 static int powerdns_get_data_dgram (list_item_t *item, /* {{{ */
327 char **ret_buffer,
328 size_t *ret_buffer_size)
329 {
330 int sd;
331 int status;
333 char temp[4096];
334 char *buffer = NULL;
335 size_t buffer_size = 0;
337 struct sockaddr_un sa_unix;
339 struct timeval stv_timeout;
340 cdtime_t cdt_timeout;
342 sd = socket (PF_UNIX, item->socktype, 0);
343 if (sd < 0)
344 {
345 FUNC_ERROR ("socket");
346 return (-1);
347 }
349 memset (&sa_unix, 0, sizeof (sa_unix));
350 sa_unix.sun_family = AF_UNIX;
351 sstrncpy (sa_unix.sun_path,
352 (local_sockpath != NULL) ? local_sockpath : PDNS_LOCAL_SOCKPATH,
353 sizeof (sa_unix.sun_path));
355 status = unlink (sa_unix.sun_path);
356 if ((status != 0) && (errno != ENOENT))
357 {
358 FUNC_ERROR ("unlink");
359 close (sd);
360 return (-1);
361 }
363 do /* while (0) */
364 {
365 /* We need to bind to a specific path, because this is a datagram socket
366 * and otherwise the daemon cannot answer. */
367 status = bind (sd, (struct sockaddr *) &sa_unix, sizeof (sa_unix));
368 if (status != 0)
369 {
370 FUNC_ERROR ("bind");
371 break;
372 }
374 /* Make the socket writeable by the daemon.. */
375 status = chmod (sa_unix.sun_path, 0666);
376 if (status != 0)
377 {
378 FUNC_ERROR ("chmod");
379 break;
380 }
382 cdt_timeout = plugin_get_interval () * 3 / 4;
383 if (cdt_timeout < TIME_T_TO_CDTIME_T (2))
384 cdt_timeout = TIME_T_TO_CDTIME_T (2);
386 CDTIME_T_TO_TIMEVAL (cdt_timeout, &stv_timeout);
388 status = setsockopt (sd, SOL_SOCKET, SO_RCVTIMEO, &stv_timeout, sizeof (stv_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 struct timeval timeout;
462 timeout.tv_sec=5;
463 timeout.tv_usec=0;
464 status = setsockopt (sd, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof (timeout));
466 status = connect (sd, (struct sockaddr *) &item->sockaddr,
467 sizeof (item->sockaddr));
468 if (status != 0)
469 {
470 FUNC_ERROR ("connect");
471 close (sd);
472 return (-1);
473 }
475 /* strlen + 1, because we need to send the terminating NULL byte, too. */
476 status = send (sd, item->command, strlen (item->command) + 1,
477 /* flags = */ 0);
478 if (status < 0)
479 {
480 FUNC_ERROR ("send");
481 close (sd);
482 return (-1);
483 }
485 while (42)
486 {
487 char *buffer_new;
489 status = recv (sd, temp, sizeof (temp), /* flags = */ 0);
490 if (status < 0)
491 {
492 FUNC_ERROR ("recv");
493 break;
494 }
495 else if (status == 0)
496 break;
498 buffer_new = (char *) realloc (buffer, buffer_size + status + 1);
499 if (buffer_new == NULL)
500 {
501 FUNC_ERROR ("realloc");
502 status = -1;
503 break;
504 }
505 buffer = buffer_new;
507 memcpy (buffer + buffer_size, temp, status);
508 buffer_size += status;
509 buffer[buffer_size] = 0;
510 } /* while (42) */
511 close (sd);
512 sd = -1;
514 if (status < 0)
515 {
516 sfree (buffer);
517 }
518 else
519 {
520 assert (status == 0);
521 *ret_buffer = buffer;
522 *ret_buffer_size = buffer_size;
523 }
525 return (status);
526 } /* }}} int powerdns_get_data_stream */
528 static int powerdns_get_data (list_item_t *item, char **ret_buffer,
529 size_t *ret_buffer_size)
530 {
531 if (item->socktype == SOCK_DGRAM)
532 return (powerdns_get_data_dgram (item, ret_buffer, ret_buffer_size));
533 else if (item->socktype == SOCK_STREAM)
534 return (powerdns_get_data_stream (item, ret_buffer, ret_buffer_size));
535 else
536 {
537 ERROR ("powerdns plugin: Unknown socket type: %i", (int) item->socktype);
538 return (-1);
539 }
540 } /* int powerdns_get_data */
542 static int powerdns_read_server (list_item_t *item) /* {{{ */
543 {
544 char *buffer = NULL;
545 size_t buffer_size = 0;
546 int status;
548 char *dummy;
549 char *saveptr;
551 char *key;
552 char *value;
554 const char* const *fields;
555 int fields_num;
557 if (item->command == NULL)
558 item->command = strdup (SERVER_COMMAND);
559 if (item->command == NULL)
560 {
561 ERROR ("powerdns plugin: strdup failed.");
562 return (-1);
563 }
565 status = powerdns_get_data (item, &buffer, &buffer_size);
566 if (status != 0)
567 return (-1);
569 if (item->fields_num != 0)
570 {
571 fields = (const char* const *) item->fields;
572 fields_num = item->fields_num;
573 }
574 else
575 {
576 fields = default_server_fields;
577 fields_num = default_server_fields_num;
578 }
580 assert (fields != NULL);
581 assert (fields_num > 0);
583 /* 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, */
584 dummy = buffer;
585 saveptr = NULL;
586 while ((key = strtok_r (dummy, ",", &saveptr)) != NULL)
587 {
588 int i;
590 dummy = NULL;
592 value = strchr (key, '=');
593 if (value == NULL)
594 break;
596 *value = '\0';
597 value++;
599 if (value[0] == '\0')
600 continue;
602 /* Check if this item was requested. */
603 for (i = 0; i < fields_num; i++)
604 if (strcasecmp (key, fields[i]) == 0)
605 break;
606 if (i >= fields_num)
607 continue;
609 submit (item->instance, key, value);
610 } /* while (strtok_r) */
612 sfree (buffer);
614 return (0);
615 } /* }}} int powerdns_read_server */
617 /*
618 * powerdns_update_recursor_command
619 *
620 * Creates a string that holds the command to be sent to the recursor. This
621 * string is stores in the `command' member of the `list_item_t' passed to the
622 * function. This function is called by `powerdns_read_recursor'.
623 */
624 static int powerdns_update_recursor_command (list_item_t *li) /* {{{ */
625 {
626 char buffer[4096];
627 int status;
629 if (li == NULL)
630 return (0);
632 if (li->fields_num < 1)
633 {
634 sstrncpy (buffer, RECURSOR_COMMAND, sizeof (buffer));
635 }
636 else
637 {
638 sstrncpy (buffer, "get ", sizeof (buffer));
639 status = strjoin (&buffer[strlen("get ")], sizeof (buffer) - strlen ("get "),
640 li->fields, li->fields_num,
641 /* seperator = */ " ");
642 if (status < 0)
643 {
644 ERROR ("powerdns plugin: strjoin failed.");
645 return (-1);
646 }
647 buffer[sizeof (buffer) - 1] = 0;
648 int i = strlen (buffer);
649 if (i < sizeof (buffer) - 2)
650 {
651 buffer[i++] = ' ';
652 buffer[i++] = '\n';
653 buffer[i++] = '\0';
654 }
655 }
657 buffer[sizeof (buffer) - 1] = 0;
658 li->command = strdup (buffer);
659 if (li->command == NULL)
660 {
661 ERROR ("powerdns plugin: strdup failed.");
662 return (-1);
663 }
665 return (0);
666 } /* }}} int powerdns_update_recursor_command */
668 static int powerdns_read_recursor (list_item_t *item) /* {{{ */
669 {
670 char *buffer = NULL;
671 size_t buffer_size = 0;
672 int status;
674 char *dummy;
676 char *keys_list;
677 char *key;
678 char *key_saveptr;
679 char *value;
680 char *value_saveptr;
682 if (item->command == NULL)
683 {
684 status = powerdns_update_recursor_command (item);
685 if (status != 0)
686 {
687 ERROR ("powerdns plugin: powerdns_update_recursor_command failed.");
688 return (-1);
689 }
691 DEBUG ("powerdns plugin: powerdns_read_recursor: item->command = %s;",
692 item->command);
693 }
694 assert (item->command != NULL);
696 status = powerdns_get_data (item, &buffer, &buffer_size);
697 if (status != 0)
698 {
699 ERROR ("powerdns plugin: powerdns_get_data failed.");
700 return (-1);
701 }
703 keys_list = strdup (item->command);
704 if (keys_list == NULL)
705 {
706 FUNC_ERROR ("strdup");
707 sfree (buffer);
708 return (-1);
709 }
711 key_saveptr = NULL;
712 value_saveptr = NULL;
714 /* Skip the `get' at the beginning */
715 strtok_r (keys_list, " \t", &key_saveptr);
717 dummy = buffer;
718 while ((value = strtok_r (dummy, " \t\n\r", &value_saveptr)) != NULL)
719 {
720 dummy = NULL;
722 key = strtok_r (NULL, " \t", &key_saveptr);
723 if (key == NULL)
724 break;
726 submit (item->instance, key, value);
727 } /* while (strtok_r) */
729 sfree (buffer);
730 sfree (keys_list);
732 return (0);
733 } /* }}} int powerdns_read_recursor */
735 static int powerdns_config_add_string (const char *name, /* {{{ */
736 char **dest,
737 oconfig_item_t *ci)
738 {
739 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
740 {
741 WARNING ("powerdns plugin: `%s' needs exactly one string argument.",
742 name);
743 return (-1);
744 }
746 sfree (*dest);
747 *dest = strdup (ci->values[0].value.string);
748 if (*dest == NULL)
749 return (-1);
751 return (0);
752 } /* }}} int powerdns_config_add_string */
754 static int powerdns_config_add_collect (list_item_t *li, /* {{{ */
755 oconfig_item_t *ci)
756 {
757 int i;
758 char **temp;
760 if (ci->values_num < 1)
761 {
762 WARNING ("powerdns plugin: The `Collect' option needs "
763 "at least one argument.");
764 return (-1);
765 }
767 for (i = 0; i < ci->values_num; i++)
768 if (ci->values[i].type != OCONFIG_TYPE_STRING)
769 {
770 WARNING ("powerdns plugin: Only string arguments are allowed to "
771 "the `Collect' option.");
772 return (-1);
773 }
775 temp = (char **) realloc (li->fields,
776 sizeof (char *) * (li->fields_num + ci->values_num));
777 if (temp == NULL)
778 {
779 WARNING ("powerdns plugin: realloc failed.");
780 return (-1);
781 }
782 li->fields = temp;
784 for (i = 0; i < ci->values_num; i++)
785 {
786 li->fields[li->fields_num] = strdup (ci->values[i].value.string);
787 if (li->fields[li->fields_num] == NULL)
788 {
789 WARNING ("powerdns plugin: strdup failed.");
790 continue;
791 }
792 li->fields_num++;
793 }
795 /* Invalidate a previously computed command */
796 sfree (li->command);
798 return (0);
799 } /* }}} int powerdns_config_add_collect */
801 static int powerdns_config_add_server (oconfig_item_t *ci) /* {{{ */
802 {
803 char *socket_temp;
805 list_item_t *item;
806 int status;
807 int i;
809 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
810 {
811 WARNING ("powerdns plugin: `%s' needs exactly one string argument.",
812 ci->key);
813 return (-1);
814 }
816 item = (list_item_t *) malloc (sizeof (list_item_t));
817 if (item == NULL)
818 {
819 ERROR ("powerdns plugin: malloc failed.");
820 return (-1);
821 }
822 memset (item, '\0', sizeof (list_item_t));
824 item->instance = strdup (ci->values[0].value.string);
825 if (item->instance == NULL)
826 {
827 ERROR ("powerdns plugin: strdup failed.");
828 sfree (item);
829 return (-1);
830 }
832 /*
833 * Set default values for the members of list_item_t
834 */
835 if (strcasecmp ("Server", ci->key) == 0)
836 {
837 item->server_type = SRV_AUTHORITATIVE;
838 item->func = powerdns_read_server;
839 item->socktype = SOCK_STREAM;
840 socket_temp = strdup (SERVER_SOCKET);
841 }
842 else if (strcasecmp ("Recursor", ci->key) == 0)
843 {
844 item->server_type = SRV_RECURSOR;
845 item->func = powerdns_read_recursor;
846 item->socktype = SOCK_DGRAM;
847 socket_temp = strdup (RECURSOR_SOCKET);
848 }
849 else
850 {
851 /* We must never get here.. */
852 assert (0);
853 return (-1);
854 }
856 status = 0;
857 for (i = 0; i < ci->children_num; i++)
858 {
859 oconfig_item_t *option = ci->children + i;
861 if (strcasecmp ("Collect", option->key) == 0)
862 status = powerdns_config_add_collect (item, option);
863 else if (strcasecmp ("Socket", option->key) == 0)
864 status = powerdns_config_add_string ("Socket", &socket_temp, option);
865 else
866 {
867 ERROR ("powerdns plugin: Option `%s' not allowed here.", option->key);
868 status = -1;
869 }
871 if (status != 0)
872 break;
873 }
875 while (status == 0)
876 {
877 llentry_t *e;
879 if (socket_temp == NULL)
880 {
881 ERROR ("powerdns plugin: socket_temp == NULL.");
882 status = -1;
883 break;
884 }
886 item->sockaddr.sun_family = AF_UNIX;
887 sstrncpy (item->sockaddr.sun_path, socket_temp,
888 sizeof (item->sockaddr.sun_path));
890 e = llentry_create (item->instance, item);
891 if (e == NULL)
892 {
893 ERROR ("powerdns plugin: llentry_create failed.");
894 status = -1;
895 break;
896 }
897 llist_append (list, e);
899 break;
900 }
902 if (status != 0)
903 {
904 sfree (item);
905 return (-1);
906 }
908 DEBUG ("powerdns plugin: Add server: instance = %s;", item->instance);
910 return (0);
911 } /* }}} int powerdns_config_add_server */
913 static int powerdns_config (oconfig_item_t *ci) /* {{{ */
914 {
915 int i;
917 DEBUG ("powerdns plugin: powerdns_config (ci = %p);", (void *) ci);
919 if (list == NULL)
920 {
921 list = llist_create ();
923 if (list == NULL)
924 {
925 ERROR ("powerdns plugin: `llist_create' failed.");
926 return (-1);
927 }
928 }
930 for (i = 0; i < ci->children_num; i++)
931 {
932 oconfig_item_t *option = ci->children + i;
934 if ((strcasecmp ("Server", option->key) == 0)
935 || (strcasecmp ("Recursor", option->key) == 0))
936 powerdns_config_add_server (option);
937 else if (strcasecmp ("LocalSocket", option->key) == 0)
938 {
939 if ((option->values_num != 1) || (option->values[0].type != OCONFIG_TYPE_STRING))
940 {
941 WARNING ("powerdns plugin: `%s' needs exactly one string argument.", option->key);
942 }
943 else
944 {
945 char *temp = strdup (option->values[0].value.string);
946 if (temp == NULL)
947 return (1);
948 sfree (local_sockpath);
949 local_sockpath = temp;
950 }
951 }
952 else
953 {
954 ERROR ("powerdns plugin: Option `%s' not allowed here.", option->key);
955 }
956 } /* for (i = 0; i < ci->children_num; i++) */
958 return (0);
959 } /* }}} int powerdns_config */
961 static int powerdns_read (void)
962 {
963 llentry_t *e;
965 for (e = llist_head (list); e != NULL; e = e->next)
966 {
967 list_item_t *item = e->value;
968 item->func (item);
969 }
971 return (0);
972 } /* static int powerdns_read */
974 static int powerdns_shutdown (void)
975 {
976 llentry_t *e;
978 if (list == NULL)
979 return (0);
981 for (e = llist_head (list); e != NULL; e = e->next)
982 {
983 list_item_t *item = (list_item_t *) e->value;
984 e->value = NULL;
986 sfree (item->instance);
987 sfree (item->command);
988 sfree (item);
989 }
991 llist_destroy (list);
992 list = NULL;
994 return (0);
995 } /* static int powerdns_shutdown */
997 void module_register (void)
998 {
999 plugin_register_complex_config ("powerdns", powerdns_config);
1000 plugin_register_read ("powerdns", powerdns_read);
1001 plugin_register_shutdown ("powerdns", powerdns_shutdown );
1002 } /* void module_register */
1004 /* vim: set sw=2 sts=2 ts=8 fdm=marker : */