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81 lines
2.0 KiB
C
81 lines
2.0 KiB
C
/*
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* BIRD Internet Routing Daemon -- Filters
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*
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* (c) 1999 Pavel Machek <pavel@ucw.cz>
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* (c) 2018--2019 Maria Matejka <mq@jmq.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#ifndef _BIRD_FILT_H_
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#define _BIRD_FILT_H_
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#include "lib/resource.h"
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#include "lib/ip.h"
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#include "lib/macro.h"
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#include "nest/route.h"
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#include "nest/attrs.h"
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/* Possible return values of filter execution */
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enum filter_return {
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F_NOP = 0,
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F_NONL,
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F_RETURN,
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F_ACCEPT, /* Need to preserve ordering: accepts < rejects! */
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F_REJECT,
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F_ERROR,
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F_QUITBIRD,
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};
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static inline const char *filter_return_str(const enum filter_return fret) {
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switch (fret) {
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#define FRS(x) case x: return #x
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FRS(F_NOP);
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FRS(F_NONL);
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FRS(F_RETURN);
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FRS(F_ACCEPT);
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FRS(F_REJECT);
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FRS(F_ERROR);
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FRS(F_QUITBIRD);
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#undef FRS
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default: bug("This shall not happen");
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}
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}
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struct f_val;
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/* The filter encapsulating structure to be pointed-to from outside */
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struct f_line;
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struct filter {
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char *name;
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const struct f_line *root;
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};
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struct rte;
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enum filter_return f_run(const struct filter *filter, struct rte **rte, struct linpool *tmp_pool, int flags);
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enum filter_return f_eval_rte(const struct f_line *expr, struct rte **rte, struct linpool *tmp_pool);
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uint f_eval_int(const struct f_line *expr);
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enum filter_return f_eval_buf(const struct f_line *expr, struct linpool *tmp_pool, buffer *buf);
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const char *filter_name(const struct filter *filter);
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int filter_same(const struct filter *new, const struct filter *old);
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int f_same(const struct f_line *f1, const struct f_line *f2);
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#define FILTER_ACCEPT NULL
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#define FILTER_REJECT ((void *) 1)
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#define FILTER_UNDEF ((void *) 2) /* Used in BGP */
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#define FF_SILENT 2 /* Silent filter execution */
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/* Custom route attributes */
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struct custom_attribute {
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resource r;
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struct f_dynamic_attr *fda;
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const char *name;
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};
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struct custom_attribute *ca_lookup(pool *p, const char *name, int ea_type);
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#endif
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