netdb: Fix bugs in lib_gethostbynamer.c

This fix sets h_name in struct hostent returned by gethostbyname()

Signed-off-by: Masayuki Ishikawa <masayuki.ishikawa@gmail.com>

libc/netdb/lib_gethostbynamer.c

@@ -205,6 +205,10 @@ static int lib_numeric_address(FAR const char *name, FAR struct hostent *host,
     }
 
   strncpy(ptr, name, buflen);
+
+  /* Set the address to h_name */
+
+  host->h_name = ptr;
   return 0;
 }
 
@@ -289,6 +293,10 @@ static int lib_localhost(FAR const char *name, FAR struct hostent *host,
         }
 
       strncpy(dest, name, buflen);
+
+      /* Set the address to h_name */
+
+      host->h_name = dest;
       return 0;
     }
 
@@ -401,6 +409,10 @@ static int lib_find_answer(FAR const char *name, FAR struct hostent *host,
     }
 
   strncpy(ptr, name, buflen);
+
+  /* Set the address to h_name */
+
+  host->h_name = ptr;
   return OK;
 }
 #endif /* CONFIG_NETDB_DNSCLIENT */
@@ -543,6 +555,10 @@ static int lib_dns_lookup(FAR const char *name, FAR struct hostent *host,
         }
 
       strncpy(ptr, name, buflen);
+
+      /* Set the address to h_name */
+
+      host->h_name = ptr;
       return OK;
     }