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

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

Todo: Should be described in user docs
This commit is contained in:
Pavel Tvrdik 2016-06-29 12:08:28 +02:00 committed by Jan Moskyto Matejka
parent f6e8e141df
commit 69ae578450
3 changed files with 15 additions and 1 deletions
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3
filter/config.Y
View File

@ -278,7 +278,7 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
TRUE, FALSE, RT, RO, UNKNOWN, GENERIC,
FROM, GW, NET, MASK, PROTO, SOURCE, SCOPE, CAST, DEST, IFNAME, IFINDEX,
PREFERENCE,
ROA_CHECK,
ROA_CHECK, ASN,
LEN,
DEFINED,
ADD, DELETE, CONTAINS, RESET,
@ -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'; $$->a1.p = $1; }
| term '.' ASN { $$ = 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'); $$->a1.p = $1; }
| term '.' LAST { $$ = f_new_inst(); $$->code = P('a','l'); $$->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','a'): /* Get ROA ASN */
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)->asn :
((net_addr_roa6 *) v1.val.net)->asn;
break;
case P('c','p'): /* Convert prefix to ... */
ONEARG;
if (v1.type != T_NET)

3
lib/net.h
View File

@ -171,6 +171,9 @@ static inline int net_type_match(const net_addr *a, u32 mask)
static inline int net_is_ip(const net_addr *a)
{ return (a->type == NET_IP4) || (a->type == NET_IP6); }
static inline int net_is_roa(const net_addr *a)
{ return (a->type == NET_ROA4) || (a->type == NET_ROA6); }
static inline ip4_addr net4_prefix(const net_addr *a)
{ return ((net_addr_ip4 *) a)->prefix; }