@@ -120,6 +120,7 @@ struct gaih_result
{
struct gaih_addrtuple *at;
char *canon;
+ bool free_at;
};
/* Values for `protoflag'. */
@@ -565,6 +566,62 @@ out:
return result;
}
+/* If possible, call the simple, old functions, which do not support IPv6 scope
+ ids, nor retrieving the canonical name. */
+
+static int
+try_simple_gethostbyname (const char *name, const struct addrinfo *req,
+ struct scratch_buffer *tmpbuf,
+ struct gaih_result *res)
+{
+ res->at = NULL;
+
+ if (req->ai_family != AF_INET || (req->ai_flags & AI_CANONNAME) != 0)
+ return 0;
+
+ int rc;
+ struct hostent th;
+ struct hostent *h;
+
+ while (1)
+ {
+ rc = __gethostbyname2_r (name, AF_INET, &th, tmpbuf->data,
+ tmpbuf->length, &h, &h_errno);
+ if (rc != ERANGE || h_errno != NETDB_INTERNAL)
+ break;
+ if (!scratch_buffer_grow (tmpbuf))
+ return -EAI_MEMORY;
+ }
+
+ if (rc == 0)
+ {
+ if (h != NULL)
+ {
+ /* We found data, convert it. RES->AT from the conversion will
+ either be an allocated block or NULL, both of which are safe to
+ pass to free (). */
+ if (!convert_hostent_to_gaih_addrtuple (req, AF_INET, h, &res->at))
+ return -EAI_MEMORY;
+
+ res->free_at = true;
+ return 0;
+ }
+ if (h_errno == NO_DATA)
+ return -EAI_NODATA;
+
+ return -EAI_NONAME;
+ }
+
+ if (h_errno == NETDB_INTERNAL)
+ return -EAI_SYSTEM;
+ if (h_errno == TRY_AGAIN)
+ return -EAI_AGAIN;
+
+ /* We made requests but they turned out no data.
+ The name is known, though. */
+ return -EAI_NODATA;
+}
+
static int
gaih_inet (const char *name, const struct gaih_service *service,
const struct addrinfo *req, struct addrinfo **pai,
@@ -610,6 +667,11 @@ gaih_inet (const char *name, const struct gaih_service *service,
else if (res.at != NULL)
goto process_list;
+ if ((result = try_simple_gethostbyname (name, req, tmpbuf, &res)) != 0)
+ goto free_and_return;
+ else if (res.at != NULL)
+ goto process_list;
+
int no_data = 0;
int no_inet6_data = 0;
nss_action_list nip;
@@ -619,69 +681,6 @@ gaih_inet (const char *name, const struct gaih_service *service,
struct resolv_context *res_ctx = NULL;
bool do_merge = false;
- /* If we do not have to look for IPv6 addresses or the canonical
- name, use the simple, old functions, which do not support
- IPv6 scope ids, nor retrieving the canonical name. */
- if (req->ai_family == AF_INET
- && (req->ai_flags & AI_CANONNAME) == 0)
- {
- int rc;
- struct hostent th;
- struct hostent *h;
-
- while (1)
- {
- rc = __gethostbyname2_r (name, AF_INET, &th,
- tmpbuf->data, tmpbuf->length,
- &h, &h_errno);
- if (rc != ERANGE || h_errno != NETDB_INTERNAL)
- break;
- if (!scratch_buffer_grow (tmpbuf))
- {
- result = -EAI_MEMORY;
- goto free_and_return;
- }
- }
-
- if (rc == 0)
- {
- if (h != NULL)
- {
- /* We found data, convert it. */
- if (!convert_hostent_to_gaih_addrtuple
- (req, AF_INET, h, &addrmem))
- {
- result = -EAI_MEMORY;
- goto free_and_return;
- }
- res.at = addrmem;
- }
- else
- {
- if (h_errno == NO_DATA)
- result = -EAI_NODATA;
- else
- result = -EAI_NONAME;
- goto free_and_return;
- }
- }
- else
- {
- if (h_errno == NETDB_INTERNAL)
- result = -EAI_SYSTEM;
- else if (h_errno == TRY_AGAIN)
- result = -EAI_AGAIN;
- else
- /* We made requests but they turned out no data.
- The name is known, though. */
- result = -EAI_NODATA;
-
- goto free_and_return;
- }
-
- goto process_list;
- }
-
#ifdef USE_NSCD
if (__nss_not_use_nscd_hosts > 0
&& ++__nss_not_use_nscd_hosts > NSS_NSCD_RETRY)
@@ -1165,6 +1164,8 @@ gaih_inet (const char *name, const struct gaih_service *service,
if (malloc_name)
free ((char *) name);
free (addrmem);
+ if (res.free_at)
+ free (res.at);
free (res.canon);
return result;