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A couple of filter tweaks:

Browse Source 
o  Introduced struct filter which serves as an external reference
      to filter. Using struct symbol for this is unwise since it doesn't
      allow extra information attached to the filter and it also forces
      all filters to be named.
   o  Implemented config rule 'filter' which matches either named filter
      or an embedded unnamed filter (`{ <filter> }').
   o  Fixed totally bogus comment at the top of filter.h.
   o  Added a missing prototype for f_run() to filter.h.
This commit is contained in:
Martin Mares 1999-03-17 14:29:39 +00:00
parent c612a3be31
commit e0f2e42f4f
4 changed files with 36 additions and 11 deletions
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1
conf/confbase.Y
View File

@ -26,6 +26,7 @@ CF_DECLS
struct symbol *s; struct symbol *s;
char *t; char *t;
struct f_inst *x; struct f_inst *x;
struct filter *f;
} }
%token END %token END

28
filter/config.Y
View File

@ -9,7 +9,6 @@
CF_HDR CF_HDR
#include "nest/bird.h" #include "nest/bird.h"
#include "filter/filter.h"
#include "lib/resource.h" #include "lib/resource.h"
#include "lib/socket.h" #include "lib/socket.h"
#include "lib/timer.h" #include "lib/timer.h"
@ -25,6 +24,7 @@ CF_KEYWORDS(FUNCTION, FILTER, PRINTDEBUG, INT, PRINT, CONST, VAR, PUTS, IF,
%type <x> term %type <x> term
%type <x> block %type <x> block
%type <x> cmds %type <x> cmds
%type <f> filter filter_body
CF_GRAMMAR CF_GRAMMAR
@ -41,16 +41,34 @@ function:
} }
; ;
CF_ADDTO(conf, filter) CF_ADDTO(conf, filter_def)
filter: filter_def:
FILTER SYM '{' cmds '}' { FILTER SYM filter_body {
if ($2->class != SYM_VOID) cf_error("Symbol already defined" ); if ($2->class != SYM_VOID) cf_error("Symbol already defined" );
$2->class = SYM_FILTER; $2->class = SYM_FILTER;
$2->def = $4; $2->def = $3;
$3->name = $2->name;
printf( "We have new filter defined (%s)\n", $2->name ) printf( "We have new filter defined (%s)\n", $2->name )
} }
; ;
filter_body:
'{' cmds '}' {
struct filter *f = cfg_alloc(sizeof(struct filter));
f->name = NULL;
f->root = $2;
$$ = f;
}
;
filter:
SYM {
if ($1->class != SYM_FILTER) cf_error("No such filter");
$$ = $1->def;
}
| filter_body
;
/* Programs */ /* Programs */
cmds: cmds:

4
filter/f-util.c
View File

@ -146,13 +146,13 @@ f_new_inst(void)
} }
int int
f_run(struct symbol *filter, struct rte *rtein, struct rte **rteout) f_run(struct filter *filter, struct rte *rtein, struct rte **rteout)
{ {
struct f_inst *inst; struct f_inst *inst;
struct f_val res; struct f_val res;
debug( "Running filter `%s'...", filter->name ); debug( "Running filter `%s'...", filter->name );
inst = filter->def; inst = filter->root;
res = interpret(inst); res = interpret(inst);
if (res.type != T_RETURN) if (res.type != T_RETURN)
return F_ERROR; return F_ERROR;

12
filter/filter.h
View File

@ -1,7 +1,7 @@
/* /*
* BIRD Internet Routing Daemon -- Configuration File Handling * BIRD Internet Routing Daemon -- Filters
* *
* (c) 1998 Martin Mares <mj@ucw.cz> * (c) 1999 Pavel Machek <pavel@ucw.cz>
* *
* Can be freely distributed and used under the terms of the GNU GPL. * Can be freely distributed and used under the terms of the GNU GPL.
*/ */
@ -24,9 +24,16 @@ struct f_val {
} val; } val;
}; };
struct filter {
char *name;
struct f_inst *root;
};
void filters_postconfig(void); void filters_postconfig(void);
struct f_inst *f_new_inst(void); struct f_inst *f_new_inst(void);
int f_run(struct filter *filter, struct rte *rtein, struct rte **rteout);
#define F_ACCEPT 1 #define F_ACCEPT 1
#define F_REJECT 2 #define F_REJECT 2
#define F_MODIFY 3 #define F_MODIFY 3
@ -39,5 +46,4 @@ struct f_inst *f_new_inst(void);
#define T_PX 11 /* prefix */ #define T_PX 11 /* prefix */
#define T_INTLIST 12 #define T_INTLIST 12
#endif #endif