static void free_lookup(rktio_addrinfo_lookup_t *lookup)
{
#if defined(RKTIO_SYSTEM_WINDOWS) || defined(RKTIO_USE_PTHREADS)
if (lookup->result)
do_freeaddrinfo(RKTIO_AS_ADDRINFO(lookup->result));
#endif
if (lookup->name)
free(lookup->name);
if (lookup->svc)
free(lookup->svc);
free(lookup->hints);
free(lookup);
}
void rktio_addrinfo_free(rktio_t *rktio, rktio_addrinfo_t *a)
{
do_freeaddrinfo(RKTIO_AS_ADDRINFO(a));
}
int zmq::ip_resolver_t::resolve_getaddrinfo (ip_addr_t *ip_addr_,
const char *addr_)
{
#if defined ZMQ_HAVE_OPENVMS && defined __ia64
__addrinfo64 *res = NULL;
__addrinfo64 req;
#else
addrinfo *res = NULL;
addrinfo req;
#endif
memset (&req, 0, sizeof (req));
// Choose IPv4 or IPv6 protocol family. Note that IPv6 allows for
// IPv4-in-IPv6 addresses.
req.ai_family = options.ipv6 () ? AF_INET6 : AF_INET;
// Arbitrary, not used in the output, but avoids duplicate results.
req.ai_socktype = SOCK_STREAM;
req.ai_flags = 0;
if (options.bindable ()) {
req.ai_flags |= AI_PASSIVE;
}
if (!options.allow_dns ()) {
req.ai_flags |= AI_NUMERICHOST;
}
#if defined AI_V4MAPPED
// In this API we only require IPv4-mapped addresses when
// no native IPv6 interfaces are available (~AI_ALL).
// This saves an additional DNS roundtrip for IPv4 addresses.
if (req.ai_family == AF_INET6) {
req.ai_flags |= AI_V4MAPPED;
}
#endif
// Resolve the literal address. Some of the error info is lost in case
// of error, however, there's no way to report EAI errors via errno.
int rc = do_getaddrinfo (addr_, NULL, &req, &res);
#if defined AI_V4MAPPED
// Some OS do have AI_V4MAPPED defined but it is not supported in getaddrinfo()
// returning EAI_BADFLAGS. Detect this and retry
if (rc == EAI_BADFLAGS && (req.ai_flags & AI_V4MAPPED)) {
req.ai_flags &= ~AI_V4MAPPED;
rc = do_getaddrinfo (addr_, NULL, &req, &res);
}
#endif
#if defined ZMQ_HAVE_WINDOWS
// Resolve specific case on Windows platform when using IPv4 address
// with ZMQ_IPv6 socket option.
if ((req.ai_family == AF_INET6) && (rc == WSAHOST_NOT_FOUND)) {
req.ai_family = AF_INET;
rc = do_getaddrinfo (addr_, NULL, &req, &res);
}
#endif
if (rc) {
switch (rc) {
case EAI_MEMORY:
errno = ENOMEM;
break;
default:
if (options.bindable ()) {
errno = ENODEV;
} else {
errno = EINVAL;
}
break;
}
return -1;
}
// Use the first result.
zmq_assert (res != NULL);
zmq_assert ((size_t) res->ai_addrlen <= sizeof (*ip_addr_));
memcpy (ip_addr_, res->ai_addr, res->ai_addrlen);
// Cleanup getaddrinfo after copying the possibly referenced result.
do_freeaddrinfo (res);
return 0;
}
