Commit b9d70dc8 authored by Pavel Machek's avatar Pavel Machek
Browse files

Filters, second try. This time they have their own directory.

parent b79f9215
source=cf-parse.tab.c cf-lex.c f-util.c
source=cf-parse.tab.c cf-lex.c
root-rel=../
include ../Rules
conf-src=$(srcdir)/conf
conf-fragments=$(conf-src)/confbase.Y @CONFS@ $(addsuffix /config.Y,$(static-dir-paths)) $(conf-src)/filter.Y
conf-fragments=$(conf-src)/confbase.Y @CONFS@ $(addsuffix /config.Y,$(static-dir-paths))
ifdef DEBUG
BISON_DEBUG=-t
......
......@@ -16,7 +16,7 @@ CF_HDR
#include "nest/protocol.h"
#include "nest/iface.h"
#include "nest/route.h"
#include "conf/filter.h"
#include "filter/filter.h"
CF_DECLS
......
source=f-util.c
root-rel=../
dir-name=filter
include ../Rules
/*
* BIRD - filters
*
* Copyright 1998 Pavel Machek
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
CF_HDR
#include "nest/bird.h"
#include "filter/filter.h"
#include "lib/resource.h"
#include "lib/socket.h"
#include "lib/timer.h"
#include "nest/protocol.h"
#include "nest/iface.h"
#include "nest/route.h"
CF_DECLS
CF_KEYWORDS(FUNCTION, FILTER, PRINTDEBUG, INT, PRINT)
%type <x> expr
CF_GRAMMAR
config:
program {
printf( "Wow, we have full program\n" );
return 0;
}
;
program: /* EMPTY */
| program function
;
CF_ADDTO(conf, function)
function:
FUNCTION SYM '(' ')' '{' expr '}' {
extern struct f_instruction *last_func;
if ($2->class != SYM_VOID) cf_error("Symbol already defined" );
$2->class = SYM_FUNCTION;
$2->aux = $6;
last_func = $6;
printf("Hmm, we've got one function here\n");
}
;
CF_ADDTO(conf, filter)
filter:
FILTER SYM '{' expr '}' {
if ($2->class != SYM_VOID) cf_error("Symbol already defined" );
$2->class = SYM_FILTER;
$2->aux = $4;
printf( "We have new filter defined (%s)\n", $2->name )
}
;
/* Programs */
expr: /* EMPTY */ { $$ = NULL; }
| expr ';' expr {
$$ = cfg_alloc(sizeof(struct f_instruction));
printf( "We've got statement here\n" );
$$->code = ',';
$$->arg1 = $1;
$$->arg2 = $3;
}
| INT SYM ';' {
if ($2->class != SYM_VOID) cf_error("Symbol already defined, can not use as variable\n" );
$2->class = SYM_VARIABLE_INT;
printf( "New variable\n" );
$$ = NULL;
}
| SYM '=' cexpr {
$$ = cfg_alloc(sizeof(struct f_instruction));
printf( "Ook, we'll set value\n" );
if ($1->class != SYM_VARIABLE_INT)
cf_error( "You may only set variables\n" );
$$->code = '=';
$$->arg1 = $1;
$$->arg2 = $3;
}
| PRINT '(' SYM ')' {
$$ = cfg_alloc(sizeof(struct f_instruction));
printf( "Ook, we'll print something\n" );
$$->code = 'p';
$$->arg1 = $3;
$$->arg2 = NULL;
}
| PRINTDEBUG {
$$ = cfg_alloc(sizeof(struct f_instruction));
$$->code = 'D';
$$->arg1 = $$->arg2 = NULL;
}
;
CF_END
/*
* Filters: utility functions
*
* Copyright 1998 Pavel Machek <pavel@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/signal.h>
#include "nest/bird.h"
#include "lib/lists.h"
#include "lib/resource.h"
#include "lib/socket.h"
#include "nest/route.h"
#include "nest/protocol.h"
#include "nest/iface.h"
#include "conf/conf.h"
#include "filter/filter.h"
struct f_instruction *last_func = NULL;
static void
interpret(struct f_instruction *what)
{
struct symbol *sym;
if (!what)
return 0;
switch(what->code) {
case ',':
interpret(what->arg1);
interpret(what->arg2);
break;
case '=':
sym = what->arg1;
sym->aux = what->arg2;
break;
case 'p':
sym = what->arg1;
switch(sym->class) {
case SYM_VARIABLE_INT:
printf( "Printing: %d\n", sym->aux );
break;
default:
printf( "Unknown type passed to print\n" );
break;
}
break;
case 'D':
printf( "DEBUGGING PRINT\n" );
break;
}
}
void
filters_init(void)
{
if (!last_func)
printf( "No function defined\n" );
else {
interpret(last_func);
}
}
/*
* BIRD Internet Routing Daemon -- Configuration File Handling
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_FILT_H_
#define _BIRD_FILT_H_
#include "lib/resource.h"
/* Lexer */
struct f_instruction {
int code;
void *arg1, *arg2;
};
#endif
......@@ -19,7 +19,7 @@
#include "nest/protocol.h"
#include "nest/iface.h"
#include "conf/conf.h"
#include "conf/filter.h"
#include "filter/filter.h"
#include "unix.h"
#include "krt.h"
......
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