lib/dummy.c

   1 /*
   2  * Copyright (c) 2010, 2011, 2012, 2013, 2015 Nicira, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <config.h>
  18 #include "dummy.h"
  19 #include <string.h>
  20 #include "util.h"
  21
  22 /* Enables support for "dummy" network devices and dpifs, which are useful for
  23  * testing.  A client program might call this function if it is designed
  24  * specifically for testing or the user enables it on the command line.
  25  *
  26  * 'arg' is parsed to determine the override level (see the definition of enum
  27  * dummy_level).
  28  *
  29  * There is no strong reason why dummy devices shouldn't always be enabled. */
  30 void
  31 dummy_enable(const char *arg)
  32 {
  33     enum dummy_level level;
  34
  35     if (!arg || !arg[0]) {
  36         level = DUMMY_OVERRIDE_NONE;
  37     } else if (!strcmp(arg, "system")) {
  38         level = DUMMY_OVERRIDE_SYSTEM;
  39     } else if (!strcmp(arg, "override")) {
  40         level = DUMMY_OVERRIDE_ALL;
  41     } else {
  42         ovs_fatal(0, "%s: unknown dummy level", arg);
  43     }
  44
  45     netdev_dummy_register(level);
  46     dpif_dummy_register(level);
  47     timeval_dummy_register();
  48     ofpact_dummy_enable();
  49 }
  50