src: add set element catch-all support

Add a catchall expression (EXPR_SET_ELEM_CATCHALL).

Use the asterisk (*) to represent the catch-all set element, e.g.

 table x {
     set y {
	type ipv4_addr
	counter
	elements = { 1.2.3.4 counter packets 0 bytes 0, * counter packets 0 bytes 0 }
     }
 }

Special handling for segtree: zap the catch-all element from the set
element list and re-add it after processing.

Remove wildcard_expr deadcode in src/parser_bison.y

This patch also adds several tests for the tests/py and tests/shell
infrastructures.

Acked-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/expression.h b/include/expression.h
index 7e626c48..be703d75 100644
--- a/include/expression.h
+++ b/include/expression.h
@@ -71,6 +71,7 @@ enum expr_types {
 	EXPR_RT,
 	EXPR_FIB,
 	EXPR_XFRM,
+	EXPR_SET_ELEM_CATCHALL,
 };
 #define EXPR_MAX EXPR_XFRM
 
@@ -497,6 +498,8 @@ extern struct expr *set_ref_expr_alloc(const struct location *loc,
 extern struct expr *set_elem_expr_alloc(const struct location *loc,
 					struct expr *key);
 
+struct expr *set_elem_catchall_expr_alloc(const struct location *loc);
+
 extern void range_expr_value_low(mpz_t rop, const struct expr *expr);
 extern void range_expr_value_high(mpz_t rop, const struct expr *expr);