Use gethostbyname3_r NSS function in case it is available.
authordrepper <drepper>
Fri, 17 Sep 2004 23:45:51 +0000 (23:45 +0000)
committerdrepper <drepper>
Fri, 17 Sep 2004 23:45:51 +0000 (23:45 +0000)
sysdeps/posix/getaddrinfo.c

index 9bf2537..c8cb752 100644 (file)
@@ -289,11 +289,12 @@ gaih_inet_serv (const char *servicename, const struct gaih_typeproto *tp,
   int herrno;                                                                \
   struct hostent th;                                                         \
   struct hostent *h;                                                         \
+  char *localcanon = NULL;                                                   \
   no_data = 0;                                                               \
   while (1) {                                                                \
     rc = 0;                                                                  \
     status = DL_CALL_FCT (fct, (name, _family, &th, tmpbuf,                  \
-           tmpbuflen, &rc, &herrno));                                        \
+                         tmpbuflen, &rc, &herrno, NULL, &localcanon));       \
     if (rc != ERANGE || herrno != NETDB_INTERNAL)                            \
       break;                                                                 \
     tmpbuf = extend_alloca (tmpbuf, tmpbuflen, 2 * tmpbuflen);               \
@@ -342,16 +343,19 @@ gaih_inet_serv (const char *servicename, const struct gaih_typeproto *tp,
          pat = &((*pat)->next);                                              \
        }                                                                     \
                                                                              \
+      if (localcanon !=        NULL)                                                 \
+       canon = strdupa (localcanon);                                         \
+                                                                             \
       if (_family == AF_INET6 && i > 0)                                              \
        got_ipv6 = true;                                                      \
     }                                                                        \
  }
 
 
-typedef enum nss_status (*nss_gethostbyname2_r)
+typedef enum nss_status (*nss_gethostbyname3_r)
   (const char *name, int af, struct hostent *host,
    char *buffer, size_t buflen, int *errnop,
-   int *h_errnop);
+   int *h_errnop, int32_t *ttlp, char **canonp);
 typedef enum nss_status (*nss_getcanonname_r)
   (const char *name, char *buffer, size_t buflen, char **result,
    int *errnop, int *h_errnop);
@@ -771,8 +775,14 @@ gaih_inet (const char *name, const struct gaih_service *service,
 
          while (!no_more)
            {
-             nss_gethostbyname2_r fct
-               = __nss_lookup_function (nip, "gethostbyname2_r");
+             nss_gethostbyname3_r fct
+               = __nss_lookup_function (nip, "gethostbyname3_r");
+             if (fct == NULL)
+               /* We are cheating here.  The gethostbyname2_r function does
+                  not have the same interface as gethostbyname3_r but the
+                  extra arguments the latter takes are added at the end.
+                  So the gethostbyname2_r code will just ignore them.  */
+               fct = __nss_lookup_function (nip, "gethostbyname2_r");
 
              if (fct != NULL)
                {
@@ -805,7 +815,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
                  if (inet6_status == NSS_STATUS_SUCCESS
                      || status == NSS_STATUS_SUCCESS)
                    {
-                     if ((req->ai_flags & AI_CANONNAME) != 0)
+                     if ((req->ai_flags & AI_CANONNAME) != 0 && canon == NULL)
                        {
                          /* If we need the canonical name, get it
                             from the same service as the result.  */