1 /**
2 * collectd - src/filter_chain.h
3 * Copyright (C) 2008 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 /*
23 * First tell the compiler to stick to the C99 and POSIX standards as close as
24 * possible.
25 */
26 #ifndef __STRICT_ANSI__ /* {{{ */
27 # define __STRICT_ANSI__
28 #endif
30 #ifndef _ISOC99_SOURCE
31 # define _ISOC99_SOURCE
32 #endif
34 #ifdef _POSIX_C_SOURCE
35 # undef _POSIX_C_SOURCE
36 #endif
37 #define _POSIX_C_SOURCE 200112L
39 #if 0
40 /* Single UNIX needed for strdup. */
41 #ifdef _XOPEN_SOURCE
42 # undef _XOPEN_SOURCE
43 #endif
44 #define _XOPEN_SOURCE 500
45 #endif
47 #ifndef _REENTRANT
48 # define _REENTRANT
49 #endif
51 #ifndef _THREAD_SAFE
52 # define _THREAD_SAFE
53 #endif
55 #ifdef _GNU_SOURCE
56 # undef _GNU_SOURCE
57 #endif
58 /* }}} */
60 #include "collectd.h"
61 #include "configfile.h"
62 #include "plugin.h"
63 #include "common.h"
64 #include "filter_chain.h"
66 /*
67 * Data types
68 */
69 /* List of matches, used in fc_rule_t and for the global `match_list_head'
70 * variable. */
71 struct fc_match_s;
72 typedef struct fc_match_s fc_match_t; /* {{{ */
73 struct fc_match_s
74 {
75 char name[DATA_MAX_NAME_LEN];
76 match_proc_t proc;
77 void *user_data;
78 fc_match_t *next;
79 }; /* }}} */
81 /* List of targets, used in fc_rule_t and for the global `target_list_head'
82 * variable. */
83 struct fc_target_s;
84 typedef struct fc_target_s fc_target_t; /* {{{ */
85 struct fc_target_s
86 {
87 char name[DATA_MAX_NAME_LEN];
88 void *user_data;
89 target_proc_t proc;
90 fc_target_t *next;
91 }; /* }}} */
93 /* List of rules, used in fc_chain_t */
94 struct fc_fule_s;
95 typedef struct fc_fule_s fc_rule_t; /* {{{ */
96 struct fc_fule_s
97 {
98 char name[DATA_MAX_NAME_LEN];
99 fc_match_t *matches;
100 fc_target_t *targets;
101 fc_rule_t *next;
102 }; /* }}} */
104 /* List of chains, used for `chain_list_head' */
105 struct fc_chain_s;
106 typedef struct fc_chain_s fc_chain_t; /* {{{ */
107 struct fc_chain_s
108 {
109 char name[DATA_MAX_NAME_LEN];
110 fc_rule_t *rules;
111 fc_target_t *targets;
112 fc_chain_t *next;
113 }; /* }}} */
115 /*
116 * Global variables
117 */
118 static fc_match_t *match_list_head;
119 static fc_target_t *target_list_head;
120 static fc_chain_t *chain_list_head;
122 /*
123 * Private functions
124 */
125 static void fc_free_matches (fc_match_t *m) /* {{{ */
126 {
127 if (m == NULL)
128 return;
130 if (m->proc.destroy != NULL)
131 (*m->proc.destroy) (&m->user_data);
132 else if (m->user_data != NULL)
133 {
134 ERROR ("Filter sybsystem: fc_free_matches: There is user data, but no "
135 "destroy functions has been specified. "
136 "Memory will probably be lost!");
137 }
139 if (m->next != NULL)
140 fc_free_matches (m->next);
142 free (m);
143 } /* }}} void fc_free_matches */
145 static void fc_free_targets (fc_target_t *t) /* {{{ */
146 {
147 if (t == NULL)
148 return;
150 if (t->proc.destroy != NULL)
151 (*t->proc.destroy) (&t->user_data);
152 else if (t->user_data != NULL)
153 {
154 ERROR ("Filter sybsystem: fc_free_targets: There is user data, but no "
155 "destroy functions has been specified. "
156 "Memory will probably be lost!");
157 }
159 if (t->next != NULL)
160 fc_free_targets (t->next);
162 free (t);
163 } /* }}} void fc_free_targets */
165 static void fc_free_rules (fc_rule_t *r) /* {{{ */
166 {
167 if (r == NULL)
168 return;
170 fc_free_matches (r->matches);
171 fc_free_targets (r->targets);
173 if (r->next != NULL)
174 fc_free_rules (r->next);
176 free (r);
177 } /* }}} void fc_free_rules */
179 static void fc_free_chains (fc_chain_t *c) /* {{{ */
180 {
181 if (c == NULL)
182 return;
184 fc_free_rules (c->rules);
185 fc_free_targets (c->targets);
187 if (c->next != NULL)
188 fc_free_chains (c->next);
190 free (c);
191 } /* }}} void fc_free_chains */
193 static char *fc_strdup (const char *orig) /* {{{ */
194 {
195 size_t sz;
196 char *dest;
198 if (orig == NULL)
199 return (NULL);
201 sz = strlen (orig) + 1;
202 dest = (char *) malloc (sz);
203 if (dest == NULL)
204 return (NULL);
206 memcpy (dest, orig, sz);
208 return (dest);
209 } /* }}} char *fc_strdup */
211 /*
212 * Configuration.
213 *
214 * The configuration looks somewhat like this:
215 *
216 * <Chain "main">
217 * <Rule>
218 * <Match "regex">
219 * Plugin "^mysql$"
220 * Type "^mysql_command$"
221 * TypeInstance "^show_"
222 * </Match>
223 * <Target "drop">
224 * </Target>
225 * </Rule>
226 *
227 * <Target "write">
228 * Plugin "rrdtool"
229 * </Target>
230 * </Chain>
231 */
232 static int fc_config_add_match (fc_match_t **matches_head, /* {{{ */
233 oconfig_item_t *ci)
234 {
235 fc_match_t *m;
236 fc_match_t *ptr;
237 int status;
239 if ((ci->values_num != 1)
240 || (ci->values[0].type != OCONFIG_TYPE_STRING))
241 {
242 WARNING ("Filter subsystem: `Match' blocks require "
243 "exactly one string argument.");
244 return (-1);
245 }
247 ptr = match_list_head;
248 while (ptr != NULL)
249 {
250 if (strcasecmp (ptr->name, ci->values[0].value.string) == 0)
251 break;
252 ptr = ptr->next;
253 }
255 if (ptr == NULL)
256 {
257 WARNING ("Filter subsystem: Cannot find a \"%s\" match. "
258 "Did you load the appropriate plugin?",
259 ci->values[0].value.string);
260 return (-1);
261 }
263 m = (fc_match_t *) malloc (sizeof (*m));
264 if (m == NULL)
265 {
266 ERROR ("fc_config_add_match: malloc failed.");
267 return (-1);
268 }
269 memset (m, 0, sizeof (*m));
271 sstrncpy (m->name, ptr->name, sizeof (m->name));
272 memcpy (&m->proc, &ptr->proc, sizeof (m->proc));
273 assert (m->proc.create != NULL);
274 m->user_data = NULL;
275 m->next = NULL;
277 status = (*m->proc.create) (ci, &m->user_data);
278 if (status != 0)
279 {
280 WARNING ("Filter subsystem: Failed to create a %s match.",
281 m->name);
282 fc_free_matches (m);
283 return (-1);
284 }
286 if (*matches_head != NULL)
287 {
288 ptr = *matches_head;
289 while (ptr->next != NULL)
290 ptr = ptr->next;
292 ptr->next = m;
293 }
294 else
295 {
296 *matches_head = m;
297 }
299 return (0);
300 } /* }}} int fc_config_add_match */
302 static int fc_config_add_target (fc_target_t **targets_head, /* {{{ */
303 oconfig_item_t *ci)
304 {
305 fc_target_t *t;
306 fc_target_t *ptr;
307 int status;
309 if ((ci->values_num != 1)
310 || (ci->values[0].type != OCONFIG_TYPE_STRING))
311 {
312 WARNING ("Filter subsystem: `Target' blocks require "
313 "exactly one string argument.");
314 return (-1);
315 }
317 ptr = target_list_head;
318 while (ptr != NULL)
319 {
320 if (strcasecmp (ptr->name, ci->values[0].value.string) == 0)
321 break;
322 ptr = ptr->next;
323 }
325 if (ptr == NULL)
326 {
327 WARNING ("Filter subsystem: Cannot find a \"%s\" target. "
328 "Did you load the appropriate plugin?",
329 ci->values[0].value.string);
330 return (-1);
331 }
333 t = (fc_target_t *) malloc (sizeof (*t));
334 if (t == NULL)
335 {
336 ERROR ("fc_config_add_match: malloc failed.");
337 return (-1);
338 }
339 memset (t, 0, sizeof (*t));
341 sstrncpy (t->name, ptr->name, sizeof (t->name));
342 memcpy (&t->proc, &ptr->proc, sizeof (t->proc));
343 assert (t->proc.create != NULL);
344 t->user_data = NULL;
345 t->next = NULL;
347 status = (*t->proc.create) (ci, &t->user_data);
348 if (status != 0)
349 {
350 WARNING ("Filter subsystem: Failed to create a %s match.",
351 t->name);
352 fc_free_targets (t);
353 return (-1);
354 }
356 if (*targets_head != NULL)
357 {
358 ptr = *targets_head;
359 while (ptr->next != NULL)
360 ptr = ptr->next;
362 ptr->next = t;
363 }
364 else
365 {
366 *targets_head = t;
367 }
369 return (0);
370 } /* }}} int fc_config_add_target */
372 static int fc_config_add_rule (fc_chain_t *chain, /* {{{ */
373 oconfig_item_t *ci)
374 {
375 fc_rule_t *rule;
376 char rule_name[2*DATA_MAX_NAME_LEN] = "Unnamed rule";
377 int status = 0;
378 int i;
380 if (ci->values_num > 1)
381 {
382 WARNING ("Filter subsystem: `Rule' blocks have at most one argument.");
383 return (-1);
384 }
385 else if ((ci->values_num == 1)
386 && (ci->values[0].type != OCONFIG_TYPE_STRING))
387 {
388 WARNING ("Filter subsystem: `Rule' blocks expect one string argument "
389 "or no argument at all.");
390 return (-1);
391 }
393 rule = (fc_rule_t *) malloc (sizeof (*rule));
394 if (rule == NULL)
395 {
396 ERROR ("fc_config_add_rule: malloc failed.");
397 return (-1);
398 }
399 memset (rule, 0, sizeof (*rule));
400 rule->next = NULL;
402 if (ci->values_num == 1)
403 {
404 sstrncpy (rule->name, ci->values[0].value.string, sizeof (rule->name));
405 ssnprintf (rule_name, sizeof (rule_name), "Rule \"%s\"",
406 ci->values[0].value.string);
407 }
409 for (i = 0; i < ci->children_num; i++)
410 {
411 oconfig_item_t *option = ci->children + i;
412 status = 0;
414 if (strcasecmp ("Match", option->key) == 0)
415 status = fc_config_add_match (&rule->matches, option);
416 else if (strcasecmp ("Target", option->key) == 0)
417 status = fc_config_add_target (&rule->targets, option);
418 else
419 {
420 WARNING ("Filter subsystem: %s: Option `%s' not allowed "
421 "inside a <Rule> block.", rule_name, option->key);
422 status = -1;
423 }
425 if (status != 0)
426 break;
427 } /* for (ci->children) */
429 /* Additional sanity checking. */
430 while (status == 0)
431 {
432 if (rule->targets == NULL)
433 {
434 WARNING ("Filter subsystem: %s: No target has been specified.",
435 rule_name);
436 status = -1;
437 break;
438 }
440 break;
441 } /* while (status == 0) */
443 if (status != 0)
444 {
445 fc_free_rules (rule);
446 return (-1);
447 }
449 if (chain->rules != NULL)
450 {
451 fc_rule_t *ptr;
453 ptr = chain->rules;
454 while (ptr->next != NULL)
455 ptr = ptr->next;
457 ptr->next = rule;
458 }
459 else
460 {
461 chain->rules = rule;
462 }
464 return (0);
465 } /* }}} int fc_config_add_rule */
467 static int fc_config_add_chain (const oconfig_item_t *ci) /* {{{ */
468 {
469 fc_chain_t *chain;
470 int status = 0;
471 int i;
473 if ((ci->values_num != 1)
474 || (ci->values[0].type != OCONFIG_TYPE_STRING))
475 {
476 WARNING ("Filter subsystem: <Chain> blocks require exactly one "
477 "string argument.");
478 return (-1);
479 }
481 chain = (fc_chain_t *) malloc (sizeof (*chain));
482 if (chain == NULL)
483 {
484 ERROR ("fc_config_add_chain: malloc failed.");
485 return (-1);
486 }
487 memset (chain, 0, sizeof (*chain));
488 sstrncpy (chain->name, ci->values[0].value.string, sizeof (chain->name));
489 chain->rules = NULL;
490 chain->targets = NULL;
491 chain->next = NULL;
493 for (i = 0; i < ci->children_num; i++)
494 {
495 oconfig_item_t *option = ci->children + i;
496 status = 0;
498 if (strcasecmp ("Rule", option->key) == 0)
499 status = fc_config_add_rule (chain, option);
500 else
501 {
502 WARNING ("Filter subsystem: Chain %s: Option `%s' not allowed "
503 "inside a <Chain> block.", chain->name, option->key);
504 status = -1;
505 }
507 if (status != 0)
508 break;
509 } /* for (ci->children) */
511 /* Additional sanity checking. */
512 while (status == 0)
513 {
514 if (chain->targets == NULL)
515 {
516 WARNING ("Filter subsystem: Chain %s: No default target has been "
517 "specified. Please make sure that there is a <Target> block within "
518 "the <Chain> block!", chain->name);
519 status = -1;
520 break;
521 }
523 break;
524 } /* while (status == 0) */
526 if (status != 0)
527 {
528 fc_free_chains (chain);
529 return (-1);
530 }
532 if (chain_list_head != NULL)
533 {
534 fc_chain_t *ptr;
536 ptr = chain_list_head;
537 while (ptr->next != NULL)
538 ptr = ptr->next;
540 ptr->next = chain;
541 }
542 else
543 {
544 chain_list_head = chain;
545 }
547 return (0);
548 } /* }}} int fc_config_add_chain */
550 int fc_process_chain (const data_set_t *ds, value_list_t *vl, /* {{{ */
551 fc_chain_t *chain)
552 {
553 fc_rule_t *rule;
554 fc_target_t *target;
555 int status;
557 if (chain == NULL)
558 return (-1);
560 status = FC_ACTION_CONTINUE;
562 for (rule = chain->rules; rule != NULL; rule = rule->next)
563 {
564 fc_match_t *match;
566 /* N. B.: rule->matches may be NULL. */
567 for (match = rule->matches; match != NULL; match = match->next)
568 {
569 status = (*match->proc.match) (ds, vl, /* meta = */ NULL,
570 &match->user_data);
571 if (status < 0)
572 {
573 WARNING ("fc_process: A match failed.");
574 break;
575 }
576 else if (status != FC_MATCH_MATCHES)
577 break;
578 }
580 /* for-loop has been aborted: Either error or no match. */
581 if (match != NULL)
582 continue;
584 for (target = rule->targets; target != NULL; target = target->next)
585 {
586 /* If we get here, all matches have matched the value. Execute the target. */
587 status = (*target->proc.invoke) (ds, vl, /* meta = */ NULL,
588 &target->user_data);
589 if (status < 0)
590 {
591 WARNING ("fc_process: A target failed.");
592 continue;
593 }
594 else if (status == FC_ACTION_CONTINUE)
595 continue;
596 else if (status == FC_ACTION_STOP)
597 break;
598 else
599 {
600 WARNING ("fc_process: Unknown target return value: %i", status);
601 }
602 }
604 if (status == FC_ACTION_STOP)
605 break;
606 } /* for (rule) */
608 /* for-loop has been aborted: A target returned `FC_ACTION_STOP' */
609 if (rule != NULL)
610 return (0);
612 for (target = chain->targets; target != NULL; target = target->next)
613 {
614 /* If we get here, all matches have matched the value. Execute the target. */
615 status = (*target->proc.invoke) (ds, vl, /* meta = */ NULL,
616 &target->user_data);
617 if (status < 0)
618 {
619 WARNING ("fc_process: The default target failed.");
620 }
621 }
623 return (0);
624 } /* }}} int fc_process_chain */
626 /*
627 * Built-in target "jump"
628 *
629 * Prefix `bit' like `_b_uilt-_i_n _t_arget'
630 */
631 static int fc_bit_jump_create (const oconfig_item_t *ci, /* {{{ */
632 void **user_data)
633 {
634 oconfig_item_t *ci_chain;
636 if (ci->children_num != 1)
637 {
638 ERROR ("Filter subsystem: The built-in target `jump' needs exactly "
639 "one `Chain' argument!");
640 return (-1);
641 }
643 ci_chain = ci->children;
644 if (strcasecmp ("Chain", ci_chain->key) != 0)
645 {
646 ERROR ("Filter subsystem: The built-in target `jump' does not "
647 "support the configuration option `%s'.",
648 ci_chain->key);
649 return (-1);
650 }
652 if ((ci_chain->values_num != 1)
653 || (ci_chain->values[0].type != OCONFIG_TYPE_STRING))
654 {
655 ERROR ("Filter subsystem: Built-in target `jump': The `Chain' option "
656 "needs exactly one string argument.");
657 return (-1);
658 }
660 *user_data = fc_strdup (ci_chain->values[0].value.string);
661 if (*user_data == NULL)
662 {
663 ERROR ("fc_bit_jump_create: fc_strdup failed.");
664 return (-1);
665 }
667 return (0);
668 } /* }}} int fc_bit_jump_create */
670 static int fc_bit_jump_destroy (void **user_data) /* {{{ */
671 {
672 if (user_data != NULL)
673 {
674 free (*user_data);
675 *user_data = NULL;
676 }
678 return (0);
679 } /* }}} int fc_bit_jump_destroy */
681 static int fc_bit_jump_invoke (const data_set_t *ds, /* {{{ */
682 value_list_t *vl, notification_meta_t **meta, void **user_data)
683 {
684 char *chain_name;
685 fc_chain_t *chain;
686 int status;
688 chain_name = *user_data;
690 for (chain = chain_list_head; chain != NULL; chain = chain->next)
691 if (strcasecmp (chain_name, chain->name) == 0)
692 break;
694 if (chain == NULL)
695 {
696 ERROR ("Filter subsystem: Built-in target `jump': There is no chain "
697 "named `%s'.", chain_name);
698 return (-1);
699 }
701 status = fc_process_chain (ds, vl, chain);
702 if (status < 0)
703 return (status);
705 return (FC_ACTION_CONTINUE);
706 } /* }}} int fc_bit_jump_invoke */
708 static int fc_bit_stop_invoke (const data_set_t *ds, /* {{{ */
709 value_list_t *vl, notification_meta_t **meta, void **user_data)
710 {
711 return (FC_ACTION_STOP);
712 } /* }}} int fc_bit_stop_invoke */
714 static int fc_bit_write_create (const oconfig_item_t *ci, /* {{{ */
715 void **user_data)
716 {
717 int i;
719 char **plugin_list;
720 size_t plugin_list_len;
722 plugin_list = NULL;
723 plugin_list_len = 0;
725 for (i = 0; i < ci->children_num; i++)
726 {
727 oconfig_item_t *child = ci->children + i;
728 char **temp;
729 int j;
731 if (strcasecmp ("Plugin", child->key) != 0)
732 {
733 ERROR ("Filter subsystem: The built-in target `write' does not "
734 "support the configuration option `%s'.",
735 child->key);
736 continue;
737 }
739 for (j = 0; j < child->values_num; j++)
740 {
741 if (child->values[j].type != OCONFIG_TYPE_STRING)
742 {
743 ERROR ("Filter subsystem: Built-in target `write': "
744 "The `Plugin' option accepts only string arguments.");
745 continue;
746 }
748 temp = (char **) realloc (plugin_list, (plugin_list_len + 2)
749 * (sizeof (*plugin_list)));
750 if (temp == NULL)
751 {
752 ERROR ("fc_bit_write_create: realloc failed.");
753 continue;
754 }
755 plugin_list = temp;
757 plugin_list[plugin_list_len] = fc_strdup (child->values[j].value.string);
758 if (plugin_list[plugin_list_len] == NULL)
759 {
760 ERROR ("fc_bit_write_create: fc_strdup failed.");
761 continue;
762 }
763 plugin_list_len++;
764 plugin_list[plugin_list_len] = NULL;
765 } /* for (j = 0; j < child->values_num; j++) */
766 } /* for (i = 0; i < ci->children_num; i++) */
768 *user_data = plugin_list;
770 return (0);
771 } /* }}} int fc_bit_write_create */
773 static int fc_bit_write_destroy (void **user_data) /* {{{ */
774 {
775 char **plugin_list;
776 size_t i;
778 if ((user_data == NULL) || (*user_data == NULL))
779 return (0);
781 plugin_list = *user_data;
783 for (i = 0; plugin_list[i] != NULL; i++)
784 free (plugin_list[i]);
785 free (plugin_list);
787 return (0);
788 } /* }}} int fc_bit_write_destroy */
790 static int fc_bit_write_invoke (const data_set_t *ds, /* {{{ */
791 value_list_t *vl, notification_meta_t **meta, void **user_data)
792 {
793 char **plugin_list;
794 int status;
796 plugin_list = NULL;
797 if (user_data != NULL)
798 plugin_list = *user_data;
800 if ((plugin_list == NULL) || (plugin_list[0] == NULL))
801 {
802 status = plugin_write (/* plugin = */ NULL, ds, vl);
803 if (status != 0)
804 {
805 INFO ("Filter subsystem: Built-in target `write': Dispatching value to "
806 "all write plugins failed with status %i.", status);
807 }
808 }
809 else
810 {
811 size_t i;
813 for (i = 0; plugin_list[i] != NULL; i++)
814 {
815 status = plugin_write (plugin_list[i], ds, vl);
816 if (status != 0)
817 {
818 INFO ("Filter subsystem: Built-in target `write': Dispatching value to "
819 "the `%s' plugin failed with status %i.", plugin_list[i], status);
820 }
821 } /* for (i = 0; plugin_list[i] != NULL; i++) */
822 }
824 return (FC_ACTION_CONTINUE);
825 } /* }}} int fc_bit_write_invoke */
827 static int fc_init_once (void) /* {{{ */
828 {
829 static int done = 0;
830 target_proc_t tproc;
832 if (done != 0)
833 return (0);
835 memset (&tproc, 0, sizeof (tproc));
836 tproc.create = fc_bit_jump_create;
837 tproc.destroy = fc_bit_jump_destroy;
838 tproc.invoke = fc_bit_jump_invoke;
839 fc_register_target ("jump", tproc);
841 memset (&tproc, 0, sizeof (tproc));
842 tproc.create = NULL;
843 tproc.destroy = NULL;
844 tproc.invoke = fc_bit_stop_invoke;
845 fc_register_target ("stop", tproc);
847 memset (&tproc, 0, sizeof (tproc));
848 tproc.create = fc_bit_write_create;
849 tproc.destroy = fc_bit_write_destroy;
850 tproc.invoke = fc_bit_write_invoke;
851 fc_register_target ("write", tproc);
853 done++;
854 return (0);
855 } /* }}} int fc_init_once */
857 /*
858 * Public functions
859 */
860 /* Add a match to list of available matches. */
861 int fc_register_match (const char *name, match_proc_t proc) /* {{{ */
862 {
863 fc_match_t *m;
865 m = (fc_match_t *) malloc (sizeof (*m));
866 if (m == NULL)
867 return (-ENOMEM);
868 memset (m, 0, sizeof (*m));
870 sstrncpy (m->name, name, sizeof (m->name));
871 memcpy (&m->proc, &proc, sizeof (m->proc));
872 m->next = NULL;
874 if (match_list_head == NULL)
875 {
876 match_list_head = m;
877 }
878 else
879 {
880 fc_match_t *ptr;
882 ptr = match_list_head;
883 while (ptr->next != NULL)
884 ptr = ptr->next;
886 ptr->next = m;
887 }
889 return (0);
890 } /* }}} int fc_register_match */
892 /* Add a target to list of available targets. */
893 int fc_register_target (const char *name, target_proc_t proc) /* {{{ */
894 {
895 fc_target_t *t;
897 t = (fc_target_t *) malloc (sizeof (*t));
898 if (t == NULL)
899 return (-ENOMEM);
900 memset (t, 0, sizeof (*t));
902 sstrncpy (t->name, name, sizeof (t->name));
903 memcpy (&t->proc, &proc, sizeof (t->proc));
904 t->next = NULL;
906 if (target_list_head == NULL)
907 {
908 target_list_head = t;
909 }
910 else
911 {
912 fc_target_t *ptr;
914 ptr = target_list_head;
915 while (ptr->next != NULL)
916 ptr = ptr->next;
918 ptr->next = t;
919 }
921 return (0);
922 } /* }}} int fc_register_target */
924 /* Iterate over all rules in the chain and execute all targets for which all
925 * matches match. */
926 int fc_process (const data_set_t *ds, value_list_t *vl) /* {{{ */
927 {
928 fc_chain_t *chain;
930 for (chain = chain_list_head; chain != NULL; chain = chain->next)
931 if (strcasecmp ("Main", chain->name) == 0)
932 break;
934 if (chain != NULL)
935 return (fc_process_chain (ds, vl, chain));
937 ERROR ("fc_process: TODO: Implement default behavior!");
939 return (0);
940 } /* }}} int fc_process */
942 int fc_configure (const oconfig_item_t *ci) /* {{{ */
943 {
944 fc_init_once ();
946 if (ci == NULL)
947 return (-EINVAL);
949 if (strcasecmp ("Chain", ci->key) == 0)
950 return (fc_config_add_chain (ci));
952 WARNING ("Filter subsystem: Unknown top level config option `%s'.",
953 ci->key);
955 return (-1);
956 } /* }}} int fc_configure */
958 /* vim: set sw=2 sts=2 et fdm=marker : */