~brightbox/bird/bird-packaging

/*

 *	Filters: utility functions

 *

 *	Copyright 1998 Pavel Machek <pavel@ucw.cz>

 *

 *	Can be freely distributed and used under the terms of the GNU GPL.

 */

#include "nest/bird.h"

#include "conf/conf.h"

#include "filter/filter.h"

#define P(a,b) ((a<<8) | b)

struct f_inst *

f_new_inst(void)

{

  struct f_inst * ret;

  ret = cfg_alloc(sizeof(struct f_inst));

  ret->code = ret->aux = 0;

  ret->arg1 = ret->arg2 = ret->next = NULL;

  ret->lineno = ifs->conf_lino;

  return ret;

}

struct f_inst *

f_new_dynamic_attr(int type, int f_type UNUSED, int code)

{

  /* FIXME: Remove the f_type parameter? */

  struct f_inst *f = f_new_inst();

  f->aux = type;

  f->a2.i = code;

  return f;

}

/*

 * Generate set_dynamic( operation( get_dynamic(), argument ) )

 */

struct f_inst *

f_generate_complex(int operation, int operation_aux, struct f_inst *dyn, struct f_inst *argument)

{

  struct f_inst *set_dyn = f_new_inst(),

                *oper = f_new_inst(),

                *get_dyn = dyn;

  *set_dyn = *get_dyn;

  get_dyn->code = P('e','a');

  oper->code = operation;

  oper->aux = operation_aux;

  oper->a1.p = get_dyn;

  oper->a2.p = argument;

  set_dyn->code = P('e','S');

  set_dyn->a1.p = oper;

  return set_dyn;

}

char *

filter_name(struct filter *filter)

{

  if (!filter)

    return "ACCEPT";

  else if (filter == FILTER_REJECT)

    return "REJECT";

  else

    return filter->name;

}