int
delegpt_add_ns(struct delegpt* dp, struct regional* region, uint8_t* name,
int lame)
{
struct delegpt_ns* ns;
size_t len;
(void)dname_count_size_labels(name, &len);
/* slow check for duplicates to avoid counting failures when
* adding the same server as a dependency twice */
if(delegpt_find_ns(dp, name, len))
return 1;
ns = (struct delegpt_ns*)regional_alloc(region,
sizeof(struct delegpt_ns));
if(!ns)
return 0;
ns->next = dp->nslist;
ns->namelen = len;
dp->nslist = ns;
ns->name = regional_alloc_init(region, name, ns->namelen);
ns->resolved = 0;
ns->got4 = 0;
ns->got6 = 0;
ns->lame = (uint8_t)lame;
ns->done_pside4 = 0;
ns->done_pside6 = 0;
return 1;
}
int delegpt_add_ns_mlc(struct delegpt* dp, uint8_t* name, uint8_t lame)
{
struct delegpt_ns* ns;
size_t len;
(void)dname_count_size_labels(name, &len);
log_assert(dp->dp_type_mlc);
/* slow check for duplicates to avoid counting failures when
* adding the same server as a dependency twice */
if(delegpt_find_ns(dp, name, len))
return 1;
ns = (struct delegpt_ns*)malloc(sizeof(struct delegpt_ns));
if(!ns)
return 0;
ns->namelen = len;
ns->name = memdup(name, ns->namelen);
if(!ns->name) {
free(ns);
return 0;
}
ns->next = dp->nslist;
dp->nslist = ns;
ns->resolved = 0;
ns->got4 = 0;
ns->got6 = 0;
ns->lame = (uint8_t)lame;
ns->done_pside4 = 0;
ns->done_pside6 = 0;
return 1;
}
void delegpt_add_neg_msg(struct delegpt* dp, struct msgreply_entry* msg)
{
struct reply_info* rep = (struct reply_info*)msg->entry.data;
if(!rep) return;
/* if error or no answers */
if(FLAGS_GET_RCODE(rep->flags) != 0 || rep->an_numrrsets == 0) {
struct delegpt_ns* ns = delegpt_find_ns(dp, msg->key.qname,
msg->key.qname_len);
if(ns) {
if(msg->key.qtype == LDNS_RR_TYPE_A)
ns->got4 = 1;
else if(msg->key.qtype == LDNS_RR_TYPE_AAAA)
ns->got6 = 1;
if(ns->got4 && ns->got6)
ns->resolved = 1;
}
}
}
int
delegpt_add_target(struct delegpt* dp, struct regional* region,
uint8_t* name, size_t namelen, struct sockaddr_storage* addr,
socklen_t addrlen, int bogus, int lame, int nodup)
{
struct delegpt_ns* ns = delegpt_find_ns(dp, name, namelen);
if(!ns) {
/* ignore it */
return 1;
}
if(!lame) {
if(addr_is_ip6(addr, addrlen))
ns->got6 = 1;
else ns->got4 = 1;
if(ns->got4 && ns->got6)
ns->resolved = 1;
}
return delegpt_add_addr(dp, region, addr, addrlen, bogus, lame, nodup);
}
int delegpt_add_target_mlc(struct delegpt* dp, uint8_t* name, size_t namelen,
struct sockaddr_storage* addr, socklen_t addrlen, uint8_t bogus,
uint8_t lame)
{
struct delegpt_ns* ns = delegpt_find_ns(dp, name, namelen);
log_assert(dp->dp_type_mlc);
if(!ns) {
/* ignore it */
return 1;
}
if(!lame) {
if(addr_is_ip6(addr, addrlen))
ns->got6 = 1;
else ns->got4 = 1;
if(ns->got4 && ns->got6)
ns->resolved = 1;
}
return delegpt_add_addr_mlc(dp, addr, addrlen, bogus, lame);
}
int
iter_dp_is_useless(struct query_info* qinfo, uint16_t qflags,
struct delegpt* dp)
{
struct delegpt_ns* ns;
/* check:
* o RD qflag is on.
* o no addresses are provided.
* o all NS items are required glue.
* OR
* o RD qflag is on.
* o no addresses are provided.
* o the query is for one of the nameservers in dp,
* and that nameserver is a glue-name for this dp.
*/
if(!(qflags&BIT_RD))
return 0;
/* either available or unused targets */
if(dp->usable_list || dp->result_list)
return 0;
/* see if query is for one of the nameservers, which is glue */
if( (qinfo->qtype == LDNS_RR_TYPE_A ||
qinfo->qtype == LDNS_RR_TYPE_AAAA) &&
dname_subdomain_c(qinfo->qname, dp->name) &&
delegpt_find_ns(dp, qinfo->qname, qinfo->qname_len))
return 1;
for(ns = dp->nslist; ns; ns = ns->next) {
if(ns->resolved) /* skip failed targets */
continue;
if(!dname_subdomain_c(ns->name, dp->name))
return 0; /* one address is not required glue */
}
return 1;
}
