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108 lines
2.4 KiB
C
108 lines
2.4 KiB
C
/*
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* Filters: utility functions
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*
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* Copyright 1998 Pavel Machek <pavel@ucw.cz>
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* 2017 Jan Maria Matejka <mq@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#include "nest/bird.h"
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#include "conf/conf.h"
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#include "filter/filter.h"
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#define P(a,b) ((a<<8) | b)
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struct f_inst *
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f_new_inst(enum f_instruction_code fi_code)
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{
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struct f_inst * ret;
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ret = cfg_allocz(sizeof(struct f_inst));
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ret->fi_code = fi_code;
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ret->lineno = ifs->lino;
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return ret;
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}
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struct f_inst *
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f_new_inst_da(enum f_instruction_code fi_code, struct f_dynamic_attr da)
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{
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struct f_inst *ret = f_new_inst(fi_code);
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ret->aux = (da.f_type << 8) | da.type;
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ret->a2.i = da.ea_code;
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return ret;
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}
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struct f_inst *
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f_new_inst_sa(enum f_instruction_code fi_code, struct f_static_attr sa)
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{
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struct f_inst *ret = f_new_inst(fi_code);
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ret->aux = sa.f_type;
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ret->a2.i = sa.sa_code;
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ret->a1.i = sa.readonly;
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return ret;
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}
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/*
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* Generate set_dynamic( operation( get_dynamic(), argument ) )
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*/
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struct f_inst *
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f_generate_complex(int operation, int operation_aux, struct f_dynamic_attr da, struct f_inst *argument)
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{
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struct f_inst *set_dyn = f_new_inst_da(FI_EA_SET, da),
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*oper = f_new_inst(operation),
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*get_dyn = f_new_inst_da(FI_EA_GET, da);
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oper->aux = operation_aux;
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oper->a1.p = get_dyn;
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oper->a2.p = argument;
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set_dyn->a1.p = oper;
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return set_dyn;
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}
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struct f_inst *
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f_generate_roa_check(struct rtable_config *table, struct f_inst *prefix, struct f_inst *asn)
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{
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struct f_inst_roa_check *ret = cfg_allocz(sizeof(struct f_inst_roa_check));
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ret->i.fi_code = FI_ROA_CHECK;
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ret->i.lineno = ifs->lino;
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ret->i.arg1 = prefix;
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ret->i.arg2 = asn;
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/* prefix == NULL <-> asn == NULL */
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if (table->addr_type != NET_ROA4 && table->addr_type != NET_ROA6)
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cf_error("%s is not a ROA table", table->name);
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ret->rtc = table;
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return &ret->i;
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}
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static const char * const f_instruction_name_str[] = {
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#define F(c,a,b) \
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[c] = #c,
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FI__LIST
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#undef F
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};
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const char *
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f_instruction_name(enum f_instruction_code fi)
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{
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if (fi < FI__MAX)
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return f_instruction_name_str[fi];
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else
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bug("Got unknown instruction code: %d", fi);
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}
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char *
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filter_name(struct filter *filter)
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{
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if (!filter)
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return "ACCEPT";
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else if (filter == FILTER_REJECT)
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return "REJECT";
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else if (!filter->name)
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return "(unnamed)";
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else
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return filter->name;
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}
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