static void
dns_lookup_host(struct dns_session *s, const char *host, int preference)
{
struct dns_lookup *lookup;
struct addrinfo hints;
char hostcopy[HOST_NAME_MAX+1];
char *p;
void *as;
lookup = xcalloc(1, sizeof *lookup, "dns_lookup_host");
lookup->preference = preference;
lookup->session = s;
s->refcount++;
if (*host == '[') {
if (strncasecmp("[IPv6:", host, 6) == 0)
host += 6;
else
host += 1;
(void)strlcpy(hostcopy, host, sizeof hostcopy);
p = strchr(hostcopy, ']');
if (p)
*p = 0;
host = hostcopy;
}
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
as = getaddrinfo_async(host, NULL, &hints, NULL);
event_asr_run(as, dns_dispatch_host, lookup);
}
int
getaddrinfo(const char *hostname, const char *servname,
const struct addrinfo *hints, struct addrinfo **res)
{
struct asr_query *as;
struct asr_result ar;
int saved_errno = errno;
if (hints == NULL || (hints->ai_flags & AI_NUMERICHOST) == 0)
res_init();
as = getaddrinfo_async(hostname, servname, hints, NULL);
if (as == NULL) {
if (errno == ENOMEM) {
errno = saved_errno;
return (EAI_MEMORY);
}
return (EAI_SYSTEM);
}
asr_run_sync(as, &ar);
*res = ar.ar_addrinfo;
if (ar.ar_gai_errno == EAI_SYSTEM)
errno = ar.ar_errno;
return (ar.ar_gai_errno);
}
