-bool link_relevant(Link *l);
-LinkAddress* link_find_address(Link *l, unsigned char family, union in_addr_union *in_addr);
-
-DnsServer* link_find_dns_server(Link *l, DnsServerSource source, unsigned char family, union in_addr_union *in_addr);
+bool link_relevant(Link *l, int family);
+LinkAddress* link_find_address(Link *l, int family, const union in_addr_union *in_addr);
+void link_add_rrs(Link *l, bool force_remove);
+DnsServer* link_find_dns_server(Link *l, int family, const union in_addr_union *in_addr);