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Filter: Use more generic approach for intra-config expressions

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Replace f_eval_int() function with a type-generic variant: cf_eval().
Implement similar fuction: cf_eval_int() via inline call to cf_eval().
This commit is contained in:
Alexander Zubkov 2023-08-24 04:45:55 +02:00 committed by Ondrej Zajicek
parent fc3547880a
commit 0dbcc92726
5 changed files with 19 additions and 25 deletions
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4
conf/confbase.Y
View File

@ -155,14 +155,14 @@ conf: definition ;
definition:
DEFINE symbol '=' term ';' {
struct f_val *val = cfg_allocz(sizeof(struct f_val));
if (f_eval(f_linearize($4, 1), cfg_mem, val) > F_RETURN) cf_error("Runtime error");
*val = cf_eval($4, T_VOID);
cf_define_symbol($2, SYM_CONSTANT | val->type, val, val);
}
;
expr:
NUM
| '(' term ')' { $$ = f_eval_int(f_linearize($2, 1)); }
| '(' term ')' { $$ = cf_eval_int($2); }
| CF_SYM_KNOWN {
if ($1->class != (SYM_CONSTANT | T_INT)) cf_error("Number constant expected");
$$ = SYM_VAL($1).i; }

8
filter/config.Y
View File

@ -358,7 +358,7 @@ filter_def:
conf: filter_eval ;
filter_eval:
EVAL term { f_eval_int(f_linearize($2, 1)); }
EVAL term { cf_eval_int($2); }
;
conf: custom_attr ;
@ -573,7 +573,7 @@ set_atom:
| VPN_RD { $$.type = T_RD; $$.val.ec = $1; }
| ENUM { $$.type = pair_a($1); $$.val.i = pair_b($1); }
| '(' term ')' {
if (f_eval(f_linearize($2, 1), cfg_mem, &($$)) > F_RETURN) cf_error("Runtime error");
$$ = cf_eval($2, T_VOID);
if (!f_valid_set_type($$.type)) cf_error("Set-incompatible type");
}
| CF_SYM_KNOWN {
@ -585,13 +585,13 @@ set_atom:
switch_atom:
NUM { $$.type = T_INT; $$.val.i = $1; }
| '(' term ')' { $$.type = T_INT; $$.val.i = f_eval_int(f_linearize($2, 1)); }
| '(' term ')' { $$ = cf_eval($2, T_INT); }
| fipa { $$ = $1; }
| ENUM { $$.type = pair_a($1); $$.val.i = pair_b($1); }
;
cnum:
term { $$ = f_eval_int(f_linearize($1, 1)); }
term { $$ = cf_eval_int($1); }
pair_item:
'(' cnum ',' cnum ')' { $$ = f_new_pair_item($2, $2, $4, $4); }

22
filter/filter.c
View File

@ -373,30 +373,22 @@ f_eval(const struct f_line *expr, struct linpool *tmp_pool, struct f_val *pres)
}
/*
* f_eval_int - get an integer value of a term
* cf_eval - evaluate a value of a term and check its type
* Called internally from the config parser, uses its internal memory pool
* for allocations. Do not call in other cases.
*/
uint
f_eval_int(const struct f_line *expr)
struct f_val
cf_eval(const struct f_inst *inst, int type)
{
/* Called independently in parse-time to eval expressions */
filter_state = (struct filter_state) {
.stack = &filter_stack,
.pool = cfg_mem,
};
struct f_val val;
LOG_BUFFER_INIT(filter_state.buf);
if (interpret(&filter_state, expr, &val) > F_RETURN)
if (f_eval(f_linearize(inst, 1), cfg_mem, &val) > F_RETURN)
cf_error("Runtime error while evaluating expression; see log for details");
if (val.type != T_INT)
cf_error("Integer expression expected");
if (type != T_VOID && val.type != type)
cf_error("Expression of type %s expected", f_type_name(type));
return val.val.i;
return val;
}
/*

8
filter/filter.h
View File

@ -15,6 +15,7 @@
#include "lib/macro.h"
#include "nest/route.h"
#include "nest/attrs.h"
#include "filter/data.h"
/* Possible return values of filter execution */
enum filter_return {
@ -40,9 +41,8 @@ static inline const char *filter_return_str(const enum filter_return fret) {
}
}
struct f_val;
/* The filter encapsulating structure to be pointed-to from outside */
struct f_inst;
struct f_line;
struct filter {
struct symbol *sym;
@ -53,9 +53,11 @@ struct rte;
enum filter_return f_run(const struct filter *filter, struct rte **rte, struct linpool *tmp_pool, int flags);
enum filter_return f_eval_rte(const struct f_line *expr, struct rte **rte, struct linpool *tmp_pool);
uint f_eval_int(const struct f_line *expr);
enum filter_return f_eval_buf(const struct f_line *expr, struct linpool *tmp_pool, buffer *buf);
struct f_val cf_eval(const struct f_inst *inst, int type);
static inline uint cf_eval_int(const struct f_inst *inst) { return cf_eval(inst, T_INT).val.i; };
const char *filter_name(const struct filter *filter);
int filter_same(const struct filter *new, const struct filter *old);
int f_same(const struct f_line *f1, const struct f_line *f2);

2
nest/config.Y
View File

@ -167,7 +167,7 @@ rtrid:
idval:
NUM { $$ = $1; }
| '(' term ')' { $$ = f_eval_int(f_linearize($2, 1)); }
| '(' term ')' { $$ = cf_eval_int($2); }
| IP4 { $$ = ip4_to_u32($1); }
| CF_SYM_KNOWN {
if ($1->class == (SYM_CONSTANT | T_INT) || $1->class == (SYM_CONSTANT | T_QUAD))