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Fill missing addresses for a delegation from the cache (if possible).

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git-svn-id: file:///svn/unbound/trunk@442 be551aaa-1e26-0410-a405-d3ace91eadb9
This commit is contained in:
Wouter Wijngaards 2007-07-20 07:14:36 +00:00
parent 306eda3809
commit 62287e64f7
3 changed files with 51 additions and 0 deletions
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3
iterator/iterator.c
View file

@ -1078,6 +1078,9 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
iq->dp = delegpt_from_message(iq->response, qstate->region);
if(!iq->dp)
return error_response(qstate, id, LDNS_RCODE_SERVFAIL);
if(!cache_fill_missing(qstate->env, iq->qchase.qclass,
qstate->region, iq->dp))
return error_response(qstate, id, LDNS_RCODE_SERVFAIL);
delegpt_log(iq->dp);
/* Count this as a referral. */
iq->referral_count++;

37
services/cache/dns.c vendored
View file

@ -204,6 +204,43 @@ find_add_addrs(struct module_env* env, uint16_t qclass, struct region* region,
return 1;
}
/** find and add A and AAAA records for missing nameservers in delegpt */
int
cache_fill_missing(struct module_env* env, uint16_t qclass,
struct region* region, struct delegpt* dp)
{
struct delegpt_ns* ns;
struct ub_packed_rrset_key* akey;
uint32_t now = time(NULL);
for(ns = dp->nslist; ns; ns = ns->next) {
if(ns->resolved)
continue;
akey = rrset_cache_lookup(env->rrset_cache, ns->name,
ns->namelen, LDNS_RR_TYPE_A, qclass, 0, now, 0);
if(akey) {
if(!delegpt_add_rrset_A(dp, region, akey)) {
lock_rw_unlock(&akey->entry.lock);
return 0;
}
log_nametypeclass(VERB_ALGO, "found in cache",
ns->name, LDNS_RR_TYPE_A, qclass);
lock_rw_unlock(&akey->entry.lock);
}
akey = rrset_cache_lookup(env->rrset_cache, ns->name,
ns->namelen, LDNS_RR_TYPE_AAAA, qclass, 0, now, 0);
if(akey) {
if(!delegpt_add_rrset_AAAA(dp, region, akey)) {
lock_rw_unlock(&akey->entry.lock);
return 0;
}
log_nametypeclass(VERB_ALGO, "found in cache",
ns->name, LDNS_RR_TYPE_AAAA, qclass);
lock_rw_unlock(&akey->entry.lock);
}
}
return 1;
}
/** find and add DS or NSEC to delegation msg */
static void
find_add_ds(struct module_env* env, struct region* region,

11
services/cache/dns.h vendored
View file

@ -107,6 +107,17 @@ struct dns_msg* dns_cache_lookup(struct module_env* env,
uint8_t* qname, size_t qnamelen, uint16_t qtype, uint16_t qclass,
struct region* region, struct region* scratch);
/**
* find and add A and AAAA records for missing nameservers in delegpt
* @param env: module environment with rrset cache
* @param qclass: which class to look in.
* @param region: where to store new dp info.
* @param dp: delegation point to fill missing entries.
* @return false on alloc failure.
*/
int cache_fill_missing(struct module_env* env, uint16_t qclass,
struct region* region, struct delegpt* dp);
/** Find covering DNAME */
#endif /* SERVICES_CACHE_DNS_H */