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0d0f6554a5
This commit removes the EAF_TYPE_* namespace completely and also for route attributes, filter-based types T_* are used. This simplifies fetching and setting route attributes from filters. Also, there is now union bval which serves as an universal value holder instead of private unions held separately by eattr and filter code.
113 lines
3.7 KiB
C
113 lines
3.7 KiB
C
/*
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* BIRD Internet Routing Daemon -- Filter instructions
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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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* Filter interpreter data structures and internal API.
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* See filter/f-inst.c for documentation.
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*/
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#ifndef _BIRD_F_INST_H_
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#define _BIRD_F_INST_H_
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#include "nest/bird.h"
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#include "conf/conf.h"
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#include "filter/filter.h"
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#include "filter/data.h"
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#include "lib/buffer.h"
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#include "lib/flowspec.h"
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/* Flags for instructions */
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enum f_instruction_flags {
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FIF_PRINTED = 1, /* FI_PRINT_AND_DIE: message put in buffer */
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} PACKED;
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/* Include generated filter instruction declarations */
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#include "filter/inst-gen.h"
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#define f_new_inst(...) MACRO_CONCAT_AFTER(f_new_inst_, MACRO_FIRST(__VA_ARGS__))(__VA_ARGS__)
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/* Convert the instruction back to the enum name */
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const char *f_instruction_name_(enum f_instruction_code fi);
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static inline const char *f_instruction_name(enum f_instruction_code fi)
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{ return f_instruction_name_(fi) + 3; }
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/* Filter structures for execution */
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/* Line of instructions to be unconditionally executed one after another */
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struct f_line {
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uint len; /* Line length */
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u8 args; /* Function: Args required */
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u8 vars;
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struct f_line_item items[0]; /* The items themselves */
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};
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/* Convert the f_inst infix tree to the f_line structures */
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struct f_line *f_linearize_concat(const struct f_inst * const inst[], uint count);
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static inline struct f_line *f_linearize(const struct f_inst *root)
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{ return f_linearize_concat(&root, 1); }
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void f_dump_line(const struct f_line *, uint indent);
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/* Recursive iteration over filter instructions */
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struct filter_iterator {
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BUFFER_(const struct f_line *) lines;
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};
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void f_add_lines(const struct f_line_item *what, struct filter_iterator *fit);
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#define FILTER_ITERATE_INIT(fit, filter, pool) \
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({ \
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BUFFER_INIT((fit)->lines, (pool), 32); \
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BUFFER_PUSH((fit)->lines) = (filter)->root; \
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})
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#define FILTER_ITERATE(fit, fi) ({ \
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const struct f_line *fl_; \
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while (!BUFFER_EMPTY((fit)->lines)) \
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{ \
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BUFFER_POP((fit)->lines); \
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fl_ = (fit)->lines.data[(fit)->lines.used]; \
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for (uint i_ = 0; i_ < fl_->len; i_++) \
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{ \
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const struct f_line_item *fi = &fl_->items[i_]; \
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f_add_lines(fi, (fit));
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#define FILTER_ITERATE_END } } })
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#define FILTER_ITERATE_CLEANUP(fit) \
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({ \
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mb_free((fit)->lines.data); \
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memset((fit), 0, sizeof(struct filter_iterator)); \
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})
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struct filter *f_new_where(struct f_inst *);
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static inline struct f_dynamic_attr f_new_dynamic_attr(u8 type, uint code)
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{ return (struct f_dynamic_attr) { .type = type, .ea_code = code }; }
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static inline struct f_dynamic_attr f_new_dynamic_attr_bit(u8 bit, uint code)
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{ return (struct f_dynamic_attr) { .type = T_INT, .bit = bit, .ea_code = code }; }
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static inline struct f_static_attr f_new_static_attr(btype type, int code, int readonly)
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{ return (struct f_static_attr) { .type = type, .sa_code = code, .readonly = readonly }; }
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struct f_inst *f_generate_complex(enum f_instruction_code fi_code, struct f_dynamic_attr da, struct f_inst *argument);
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struct f_inst *f_generate_roa_check(struct rtable_config *table, struct f_inst *prefix, struct f_inst *asn);
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/* Hook for call bt_assert() function in configuration */
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extern void (*bt_assert_hook)(int result, const struct f_line_item *assert);
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/* Bird Tests */
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struct f_bt_test_suite {
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node n; /* Node in config->tests */
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const struct f_line *fn; /* Root of function */
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const struct f_line *cmp; /* Compare to this function */
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const char *fn_name; /* Name of test */
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const char *dsc; /* Description */
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int result; /* Desired result */
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};
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#endif
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