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Add `.maxlen' operator to all ROA prefixes in filters

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Example:
  bird> eval (1.2.0.0/16 max 20 as 1234).maxlen
  20

Todo: Should be described in user docs
This commit is contained in:
Pavel Tvrdik 2016-06-29 12:21:43 +02:00 committed by Jan Moskyto Matejka
parent 69ae578450
commit e58f8c28d2
2 changed files with 12 additions and 1 deletions
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3
filter/config.Y
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@ -279,7 +279,7 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
FROM, GW, NET, MASK, PROTO, SOURCE, SCOPE, CAST, DEST, IFNAME, IFINDEX,
PREFERENCE,
ROA_CHECK, ASN,
LEN,
LEN, MAXLEN,
DEFINED,
ADD, DELETE, CONTAINS, RESET,
PREPEND, FIRST, LAST, LAST_NONAGGREGATED, MATCH,
@ -740,6 +740,7 @@ term:
| term '.' IP { $$ = f_new_inst(); $$->code = P('c','p'); $$->a1.p = $1; $$->aux = T_IP; }
| term '.' LEN { $$ = f_new_inst(); $$->code = 'L'; $$->a1.p = $1; }
| term '.' MAXLEN { $$ = f_new_inst(); $$->code = P('R','m'); $$->a1.p = $1; }
| term '.' ASN { $$ = f_new_inst(); $$->code = P('R','a'); $$->a1.p = $1; }
| term '.' MASK '(' term ')' { $$ = f_new_inst(); $$->code = P('i','M'); $$->a1.p = $1; $$->a2.p = $5; }
| term '.' FIRST { $$ = f_new_inst(); $$->code = P('a','f'); $$->a1.p = $1; }

10
filter/filter.c
View file

@ -1029,6 +1029,16 @@ interpret(struct f_inst *what)
default: runtime( "Prefix, path, clist or eclist expected" );
}
break;
case P('R','m'): /* Get ROA max prefix length */
ONEARG;
if (v1.type != T_NET || !net_is_roa(v1.val.net))
runtime( "ROA expected" );
res.type = T_INT;
res.val.i = (v1.val.net->type == NET_ROA4) ?
((net_addr_roa4 *) v1.val.net)->max_pxlen :
((net_addr_roa6 *) v1.val.net)->max_pxlen;
break;
case P('R','a'): /* Get ROA ASN */
ONEARG;
if (v1.type != T_NET || !net_is_roa(v1.val.net))