/**
* QUERY.
*
*/
static query_state
query_process_query(query_type* q, ldns_rr_type qtype, engine_type* engine)
{
dnsout_type* dnsout = NULL;
if (!q || !q->zone) {
return QUERY_DISCARDED;
}
ods_log_assert(q->zone->name);
ods_log_debug("[%s] incoming query qtype=%s for zone %s", query_str,
rrset_type2str(qtype), q->zone->name);
/* sanity checks */
if (buffer_pkt_qdcount(q->buffer) != 1 || buffer_pkt_tc(q->buffer)) {
buffer_pkt_set_flags(q->buffer, 0);
return query_formerr(q);
}
if (buffer_pkt_ancount(q->buffer) != 0 ||
(qtype != LDNS_RR_TYPE_IXFR && buffer_pkt_nscount(q->buffer) != 0)) {
buffer_pkt_set_flags(q->buffer, 0);
return query_formerr(q);
}
/* acl */
if (!q->zone->adoutbound || q->zone->adoutbound->type != ADAPTER_DNS) {
ods_log_error("[%s] zone %s is not configured to have output dns "
"adapter", query_str, q->zone->name);
return query_refused(q);
}
ods_log_assert(q->zone->adoutbound->config);
dnsout = (dnsout_type*) q->zone->adoutbound->config;
/* acl also in use for soa and other queries */
if (!acl_find(dnsout->provide_xfr, &q->addr, q->tsig_rr)) {
return query_refused(q);
}
/* ixfr? */
if (qtype == LDNS_RR_TYPE_IXFR) {
if (query_process_ixfr(q) != QUERY_PROCESSED) {
buffer_pkt_set_flags(q->buffer, 0);
return query_formerr(q);
}
query_prepare(q);
ods_log_assert(q->zone->name);
ods_log_debug("[%s] incoming ixfr request serial=%u for zone %s",
query_str, q->serial, q->zone->name);
return ixfr(q, engine);
}
query_prepare(q);
/* axfr? */
if (qtype == LDNS_RR_TYPE_AXFR) {
ods_log_assert(q->zone->name);
ods_log_debug("[%s] incoming axfr request for zone %s",
query_str, q->zone->name);
return axfr(q, engine);
}
/* (soa) query */
return query_response(q, qtype);
}
/**
* Process RR.
*
*/
static ods_status
adapi_process_rr(zone_type* zone, ldns_rr* rr, int add, int backup)
{
ods_status status = ODS_STATUS_OK;
uint32_t tmp = 0;
ods_log_assert(rr);
ods_log_assert(zone);
ods_log_assert(zone->name);
ods_log_assert(zone->db);
ods_log_assert(zone->signconf);
/* We only support IN class */
if (ldns_rr_get_class(rr) != LDNS_RR_CLASS_IN) {
ods_log_warning("[%s] only class in is supported, changing class "
"to in", adapi_str);
ldns_rr_set_class(rr, LDNS_RR_CLASS_IN);
}
/* RR processing */
if (ldns_rr_get_type(rr) == LDNS_RR_TYPE_SOA) {
if (ldns_dname_compare(ldns_rr_owner(rr), zone->apex)) {
ods_log_error("[%s] unable to %s rr to zone: soa record has "
"invalid owner name", adapi_str, add?"add":"delete");
return ODS_STATUS_ERR;
}
status = adapi_process_soa(zone, rr, add, backup);
if (status != ODS_STATUS_OK) {
ods_log_error("[%s] unable to %s rr: failed to process soa "
"record", adapi_str, add?"add":"delete");
return status;
}
} else {
if (ldns_dname_compare(ldns_rr_owner(rr), zone->apex) &&
!ldns_dname_is_subdomain(ldns_rr_owner(rr), zone->apex)) {
ods_log_warning("[%s] zone %s contains out-of-zone data, "
"skipping", adapi_str, zone->name);
return ODS_STATUS_UNCHANGED;
} else if (ldns_rr_get_type(rr) == LDNS_RR_TYPE_DNSKEY) {
adapi_process_dnskey(zone, rr);
} else if (util_is_dnssec_rr(rr) && !backup) {
ods_log_warning("[%s] zone %s contains dnssec data (type=%u), "
"skipping", adapi_str, zone->name,
(unsigned) ldns_rr_get_type(rr));
return ODS_STATUS_UNCHANGED;
} else if (zone->signconf->max_zone_ttl) {
/* Convert MaxZoneTTL */
tmp = (uint32_t) duration2time(zone->signconf->max_zone_ttl);
}
}
/* //MaxZoneTTL. Only set for RRtype != SOA && RRtype != DNSKEY */
if (tmp && tmp < ldns_rr_ttl(rr)) {
char* str = ldns_rdf2str(ldns_rr_owner(rr));
if (str) {
size_t i = 0;
str[(strlen(str))-1] = '\0';
/* replace tabs with white space */
for (i=0; i < strlen(str); i++) {
if (str[i] == '\t') {
str[i] = ' ';
}
}
ods_log_debug("[%s] capping ttl %u to MaxZoneTTL %u for rrset "
"<%s,%s>", adapi_str, ldns_rr_ttl(rr), tmp, str,
rrset_type2str(ldns_rr_get_type(rr)));
}
ldns_rr_set_ttl(rr, tmp);
}
/* TODO: DNAME and CNAME checks */
/* TODO: NS and DS checks */
if (add) {
return zone_add_rr(zone, rr, 1);
} else {
return zone_del_rr(zone, rr, 1);
}
/* not reached */
return ODS_STATUS_ERR;
}