static void next_lookup(struct addr_query *aquery)
{
const char *p;
char name[128];
int status;
struct hostent *host;
for (p = aquery->remaining_lookups; *p; p++)
{
switch (*p)
{
case 'b':
ptr_rr_name(name, &aquery->addr);
aquery->remaining_lookups = p + 1;
ares_query(aquery->channel, name, C_IN, T_PTR, addr_callback,
aquery);
return;
case 'f':
status = file_lookup(&aquery->addr, &host);
/* this status check below previously checked for !ARES_ENOTFOUND,
but we should not assume that this single error code is the one
that can occur, as that is in fact no longer the case */
if (status == ARES_SUCCESS)
{
end_aquery(aquery, status, host);
return;
}
break;
}
}
end_aquery(aquery, ARES_ENOTFOUND, NULL);
}
static void addr_callback(void *arg, int status, int timeouts,
unsigned char *abuf, int alen)
{
struct addr_query *aquery = (struct addr_query *) arg;
struct hostent *host;
size_t addrlen;
aquery->timeouts += timeouts;
if (status == ARES_SUCCESS)
{
if (aquery->addr.family == AF_INET)
{
addrlen = sizeof(struct in_addr);
status = ares_parse_ptr_reply(abuf, alen, &aquery->addr.addrV4,
(int)addrlen, AF_INET, &host);
}
else
{
addrlen = sizeof(struct in6_addr);
status = ares_parse_ptr_reply(abuf, alen, &aquery->addr.addrV6,
(int)addrlen, AF_INET6, &host);
}
end_aquery(aquery, status, host);
}
else if (status == ARES_EDESTRUCTION)
end_aquery(aquery, status, NULL);
else
next_lookup(aquery);
}
