/** match edns sections */
static int
match_edns(ldns_pkt* q, ldns_pkt* p)
{
if(ldns_pkt_edns_udp_size(q) != ldns_pkt_edns_udp_size(p))
return 0;
if(ldns_pkt_edns_extended_rcode(q) != ldns_pkt_edns_extended_rcode(p))
return 0;
if(ldns_pkt_edns_version(q) != ldns_pkt_edns_version(p))
return 0;
if(ldns_pkt_edns_do(q) != ldns_pkt_edns_do(p))
return 0;
if(ldns_pkt_edns_z(q) != ldns_pkt_edns_z(p))
return 0;
if(ldns_rdf_compare(ldns_pkt_edns_data(q), ldns_pkt_edns_data(p)) != 0)
return 0;
return 1;
}
/* finds entry in list, or returns NULL */
struct entry*
find_match(struct entry* entries, ldns_pkt* query_pkt,
enum transport_type transport)
{
struct entry* p = entries;
ldns_pkt* reply = NULL;
for(p=entries; p; p=p->next) {
verbose(3, "comparepkt: ");
reply = p->reply_list->reply;
if(p->match_opcode && ldns_pkt_get_opcode(query_pkt) !=
ldns_pkt_get_opcode(reply)) {
verbose(3, "bad opcode\n");
continue;
}
if(p->match_qtype && get_qtype(query_pkt) != get_qtype(reply)) {
verbose(3, "bad qtype\n");
continue;
}
if(p->match_qname) {
if(!get_owner(query_pkt) || !get_owner(reply) ||
ldns_dname_compare(
get_owner(query_pkt), get_owner(reply)) != 0) {
verbose(3, "bad qname\n");
continue;
}
}
if(p->match_subdomain) {
if(!get_owner(query_pkt) || !get_owner(reply) ||
(ldns_dname_compare(get_owner(query_pkt),
get_owner(reply)) != 0 &&
!ldns_dname_is_subdomain(
get_owner(query_pkt), get_owner(reply))))
{
verbose(3, "bad subdomain\n");
continue;
}
}
if(p->match_serial && get_serial(query_pkt) != p->ixfr_soa_serial) {
verbose(3, "bad serial\n");
continue;
}
if(p->match_do && !ldns_pkt_edns_do(query_pkt)) {
verbose(3, "no DO bit set\n");
continue;
}
if(p->match_noedns && ldns_pkt_edns(query_pkt)) {
verbose(3, "bad; EDNS OPT present\n");
continue;
}
if(p->match_transport != transport_any && p->match_transport != transport) {
verbose(3, "bad transport\n");
continue;
}
if(p->match_all && !match_all(query_pkt, reply, p->match_ttl)) {
verbose(3, "bad allmatch\n");
continue;
}
verbose(3, "match!\n");
return p;
}
return NULL;
}
