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/*
* Filters: utility functions
*
* Copyright 1998 Pavel Machek <pavel@ucw.cz>
* 2017 Jan Maria Matejka <mq@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(enum f_instruction_code fi_code)
{
struct f_inst * ret;
ret = cfg_allocz(sizeof(struct f_inst));
ret->fi_code = fi_code;
ret->lineno = ifs->lino;
return ret;
}
struct f_inst *
f_new_inst_da(enum f_instruction_code fi_code, struct f_dynamic_attr da)
{
struct f_inst *ret = f_new_inst(fi_code);
ret->aux = da.type;
ret->a2.i = da.ea_code;
return ret;
}
struct f_inst *
f_new_inst_sa(enum f_instruction_code fi_code, struct f_static_attr sa)
{
struct f_inst *ret = f_new_inst(fi_code);
ret->aux = sa.f_type;
ret->a2.i = sa.sa_code;
ret->a1.i = sa.readonly;
return ret;
}
/*
* Generate set_dynamic( operation( get_dynamic(), argument ) )
*/
struct f_inst *
f_generate_complex(int operation, int operation_aux, struct f_dynamic_attr da, struct f_inst *argument)
{
struct f_inst *set_dyn = f_new_inst_da(FI_EA_SET, da),
*oper = f_new_inst(operation),
*get_dyn = f_new_inst_da(FI_EA_GET, da);
oper->aux = operation_aux;
oper->a1.p = get_dyn;
oper->a2.p = argument;
set_dyn->a1.p = oper;
return set_dyn;
}
struct f_inst *
f_generate_roa_check(struct symbol *sym, struct f_inst *prefix, struct f_inst *asn)
{
struct f_inst_roa_check *ret = cfg_allocz(sizeof(struct f_inst_roa_check));
ret->i.fi_code = FI_ROA_CHECK;
ret->i.lineno = ifs->lino;
ret->i.arg1 = prefix;
ret->i.arg2 = asn;
/* prefix == NULL <-> asn == NULL */
if ((sym->class != SYM_ROA) || ! sym->def)
cf_error("%s is not a ROA table", sym->name);
ret->rtc = sym->def;
return &ret->i;
}
char *
filter_name(struct filter *filter)
{
if (!filter)
return "ACCEPT";
else if (filter == FILTER_REJECT)
return "REJECT";
else if (!filter->name)
return "(unnamed)";
else
return filter->name;
}
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