+/* not a recursive definition because some pedant will just come along
+ * and whine that the parser accepts "ipv4 ipv4 ipv4 ipv4"
+ */
+address_family:
+ { $$ = 0; }
+ | TOK_IPV4 { $$ = USE_IPV4; }
+ | TOK_IPV6 { $$ = USE_IPV6; }
+ | TOK_IPV4 TOK_IPV6 { $$ = USE_IPV4 | USE_IPV6; }
+ | TOK_IPV6 TOK_IPV4 { $$ = USE_IPV6 | USE_IPV4; }
+ ;
+