mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-11-08 20:28:43 +00:00
c5f6dc8142
This merge was particularly difficult. I finally resorted to delete the symbol scope active flag altogether and replace its usage by other means. Also I had to update custom route attribute registration to fit both the scope updates in v2 and the data model in v3.
134 lines
4.3 KiB
C
134 lines
4.3 KiB
C
/*
|
|
* BIRD Internet Routing Daemon -- Filter instructions
|
|
*
|
|
* (c) 1999 Pavel Machek <pavel@ucw.cz>
|
|
* (c) 2018--2019 Maria Matejka <mq@jmq.cz>
|
|
*
|
|
* Can be freely distributed and used under the terms of the GNU GPL.
|
|
*
|
|
* Filter interpreter data structures and internal API.
|
|
* See filter/f-inst.c for documentation.
|
|
*/
|
|
|
|
#ifndef _BIRD_F_INST_H_
|
|
#define _BIRD_F_INST_H_
|
|
|
|
#include "nest/bird.h"
|
|
#include "conf/conf.h"
|
|
#include "filter/filter.h"
|
|
#include "filter/data.h"
|
|
#include "lib/buffer.h"
|
|
#include "lib/flowspec.h"
|
|
#include "lib/string.h"
|
|
|
|
/* Flags for instructions */
|
|
enum f_instruction_flags {
|
|
FIF_RECURSIVE = 1, /* FI_CALL: function is directly recursive */
|
|
} PACKED;
|
|
|
|
/* Include generated filter instruction declarations */
|
|
#include "filter/inst-gen.h"
|
|
|
|
#define f_new_inst(...) MACRO_CONCAT_AFTER(f_new_inst_, MACRO_FIRST(__VA_ARGS__))(__VA_ARGS__)
|
|
|
|
/* Convert the instruction back to the enum name */
|
|
const char *f_instruction_name_(enum f_instruction_code fi);
|
|
static inline const char *f_instruction_name(enum f_instruction_code fi)
|
|
{ return f_instruction_name_(fi) + 3; }
|
|
|
|
|
|
int f_const_promotion_(struct f_inst *arg, enum btype want, int update);
|
|
|
|
static inline int f_const_promotion(struct f_inst *arg, enum btype want)
|
|
{ return f_const_promotion_(arg, want, 1); }
|
|
|
|
static inline int f_try_const_promotion(struct f_inst *arg, enum btype want)
|
|
{ return f_const_promotion_(arg, want, 0); }
|
|
|
|
|
|
struct f_arg {
|
|
struct symbol *arg;
|
|
struct f_arg *next;
|
|
};
|
|
|
|
/* Filter structures for execution */
|
|
/* Line of instructions to be unconditionally executed one after another */
|
|
struct f_line {
|
|
uint len; /* Line length */
|
|
u8 args; /* Function: Args required */
|
|
u8 vars;
|
|
u8 results; /* Results left on stack: cmd -> 0, term -> 1 */
|
|
u8 return_type; /* Type which the function returns */
|
|
struct f_arg *arg_list;
|
|
struct f_line_item items[0]; /* The items themselves */
|
|
};
|
|
|
|
/* Convert the f_inst infix tree to the f_line structures */
|
|
struct f_line *f_linearize_concat(const struct f_inst * const inst[], uint count, uint results);
|
|
static inline struct f_line *f_linearize(const struct f_inst *root, uint results)
|
|
{ return f_linearize_concat(&root, 1, results); }
|
|
|
|
void f_dump_line(const struct f_line *, uint indent);
|
|
|
|
|
|
/* Recursive iteration over filter instructions */
|
|
|
|
struct filter_iterator {
|
|
BUFFER_(const struct f_line *) lines;
|
|
};
|
|
|
|
void f_add_lines(const struct f_line_item *what, struct filter_iterator *fit);
|
|
|
|
#define FILTER_ITERATE_INIT(fit, line, pool) \
|
|
({ \
|
|
BUFFER_INIT((fit)->lines, (pool), 32); \
|
|
BUFFER_PUSH((fit)->lines) = (line); \
|
|
})
|
|
|
|
#define FILTER_ITERATE(fit, fi) ({ \
|
|
const struct f_line *fl_; \
|
|
while (!BUFFER_EMPTY((fit)->lines)) \
|
|
{ \
|
|
BUFFER_POP((fit)->lines); \
|
|
fl_ = (fit)->lines.data[(fit)->lines.used]; \
|
|
for (uint i_ = 0; i_ < fl_->len; i_++) \
|
|
{ \
|
|
const struct f_line_item *fi = &fl_->items[i_]; \
|
|
f_add_lines(fi, (fit));
|
|
|
|
#define FILTER_ITERATE_END } } })
|
|
|
|
#define FILTER_ITERATE_CLEANUP(fit) \
|
|
({ \
|
|
mb_free((fit)->lines.data); \
|
|
memset((fit), 0, sizeof(struct filter_iterator)); \
|
|
})
|
|
|
|
|
|
struct filter *f_new_where(struct f_inst *);
|
|
struct f_inst *f_dispatch_method(struct symbol *sym, struct f_inst *obj, struct f_inst *args, int skip);
|
|
struct f_inst *f_dispatch_method_x(const char *name, enum btype t, struct f_inst *obj, struct f_inst *args);
|
|
struct f_inst *f_for_cycle(struct symbol *var, struct f_inst *term, struct f_inst *block);
|
|
struct f_inst *f_implicit_roa_check(struct rtable_config *tab);
|
|
struct f_inst *f_print(struct f_inst *vars, int flush, enum filter_return fret);
|
|
|
|
static inline struct f_static_attr f_new_static_attr(btype type, int code, int readonly)
|
|
{ return (struct f_static_attr) { .type = type, .sa_code = code, .readonly = readonly }; }
|
|
struct f_inst *f_generate_roa_check(struct rtable_config *table, struct f_inst *prefix, struct f_inst *asn);
|
|
|
|
|
|
/* Hook for call bt_assert() function in configuration */
|
|
extern void (*bt_assert_hook)(int result, const struct f_line_item *assert);
|
|
|
|
/* Bird Tests */
|
|
struct f_bt_test_suite {
|
|
node n; /* Node in config->tests */
|
|
const struct f_line *fn; /* Root of function */
|
|
const struct f_line *cmp; /* Compare to this function */
|
|
const char *fn_name; /* Name of test */
|
|
const char *dsc; /* Description */
|
|
int result; /* Desired result */
|
|
};
|
|
|
|
#endif
|