bird/filter/f-util.c

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/*
* 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;
switch(what->code) {
case ',':
interpret(what->arg1);
interpret(what->arg2);
break;
case '=':
sym = what->arg1;
sym->aux = (int) 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;
case '0':
printf( "No operation\n" );
break;
}
interpret(what->next);
}
void
filters_postconfig(void)
{
if (!last_func)
printf( "No function defined\n" );
else {
interpret(last_func);
}
}
struct f_instruction *
f_new_inst(void)
{
struct f_instruction * ret;
ret = cfg_alloc(sizeof(struct f_instruction));
ret->code = 0;
ret->arg1 = ret->arg2 = ret->next = NULL;
return ret;
}
int
f_run(struct symbol *filter, struct rte *rtein, struct rte **rteout)
{
struct f_instruction *inst;
debug( "Running filter `%s'...", filter->name );
inst = filter->def;
interpret(inst);
debug( "done\n" );
return F_ACCEPT;
}