/** load a msg entry */
static int
load_msg(SSL* ssl, ldns_buffer* buf, struct worker* worker)
{
struct regional* region = worker->scratchpad;
struct query_info qinf;
struct reply_info rep;
char* s = (char*)ldns_buffer_begin(buf);
unsigned int flags, qdcount, ttl, security, an, ns, ar;
size_t i;
int go_on = 1;
regional_free_all(region);
if(strncmp(s, "msg ", 4) != 0) {
log_warn("error expected msg but got %s", s);
return 0;
}
s += 4;
s = load_qinfo(s, &qinf, buf, region);
if(!s) {
return 0;
}
/* read remainder of line */
if(sscanf(s, " %u %u %u %u %u %u %u", &flags, &qdcount, &ttl,
&security, &an, &ns, &ar) != 7) {
log_warn("error cannot parse numbers: %s", s);
return 0;
}
rep.flags = (uint16_t)flags;
rep.qdcount = (uint16_t)qdcount;
rep.ttl = (uint32_t)ttl;
rep.prefetch_ttl = PREFETCH_TTL_CALC(rep.ttl);
rep.security = (enum sec_status)security;
rep.an_numrrsets = (size_t)an;
rep.ns_numrrsets = (size_t)ns;
rep.ar_numrrsets = (size_t)ar;
rep.rrset_count = (size_t)an+(size_t)ns+(size_t)ar;
rep.rrsets = (struct ub_packed_rrset_key**)regional_alloc_zero(
region, sizeof(struct ub_packed_rrset_key*)*rep.rrset_count);
/* fill repinfo with references */
for(i=0; i<rep.rrset_count; i++) {
if(!load_ref(ssl, buf, worker, region, &rep.rrsets[i],
&go_on)) {
return 0;
}
}
if(!go_on)
return 1; /* skip this one, not all references satisfied */
if(!dns_cache_store(&worker->env, &qinf, &rep, 0, 0, 0, NULL)) {
log_warn("error out of memory");
return 0;
}
return 1;
}
/** load a msg rrset reference */
static int
load_ref(SSL* ssl, sldns_buffer* buf, struct worker* worker,
struct regional *region, struct ub_packed_rrset_key** rrset,
int* go_on)
{
char* s = (char*)sldns_buffer_begin(buf);
struct query_info qinfo;
unsigned int flags;
struct ub_packed_rrset_key* k;
/* read line */
if(!ssl_read_buf(ssl, buf))
return 0;
if(strncmp(s, "BADREF", 6) == 0) {
*go_on = 0; /* its bad, skip it and skip message */
return 1;
}
s = load_qinfo(s, &qinfo, region);
if(!s) {
return 0;
}
if(sscanf(s, " %u", &flags) != 1) {
log_warn("error cannot parse flags: %s", s);
return 0;
}
/* lookup in cache */
k = rrset_cache_lookup(worker->env.rrset_cache, qinfo.qname,
qinfo.qname_len, qinfo.qtype, qinfo.qclass,
(uint32_t)flags, *worker->env.now, 0);
if(!k) {
/* not found or expired */
*go_on = 0;
return 1;
}
/* store in result */
*rrset = packed_rrset_copy_region(k, region, *worker->env.now);
lock_rw_unlock(&k->entry.lock);
return (*rrset != NULL);
}
