2 * Copyright (c) 2010, 2011 Nicira Networks.
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:
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
24 #include "netdev-provider.h"
29 VLOG_DEFINE_THIS_MODULE(netdev_dummy);
31 struct netdev_dev_dummy {
32 struct netdev_dev netdev_dev;
33 uint8_t hwaddr[ETH_ADDR_LEN];
35 struct netdev_stats stats;
36 enum netdev_flags flags;
37 unsigned int change_seq;
44 static int netdev_dummy_create(const struct netdev_class *, const char *,
45 const struct shash *, struct netdev_dev **);
46 static void netdev_dummy_poll_notify(const struct netdev *);
49 is_dummy_class(const struct netdev_class *class)
51 return class->create == netdev_dummy_create;
54 static struct netdev_dev_dummy *
55 netdev_dev_dummy_cast(const struct netdev_dev *netdev_dev)
57 assert(is_dummy_class(netdev_dev_get_class(netdev_dev)));
58 return CONTAINER_OF(netdev_dev, struct netdev_dev_dummy, netdev_dev);
61 static struct netdev_dummy *
62 netdev_dummy_cast(const struct netdev *netdev)
64 struct netdev_dev *netdev_dev = netdev_get_dev(netdev);
65 assert(is_dummy_class(netdev_dev_get_class(netdev_dev)));
66 return CONTAINER_OF(netdev, struct netdev_dummy, netdev);
70 netdev_dummy_create(const struct netdev_class *class, const char *name,
71 const struct shash *args,
72 struct netdev_dev **netdev_devp)
74 static unsigned int n = 0xaa550000;
75 struct netdev_dev_dummy *netdev_dev;
77 netdev_dev = xzalloc(sizeof *netdev_dev);
78 netdev_dev_init(&netdev_dev->netdev_dev, name, args, class);
79 netdev_dev->hwaddr[0] = 0xaa;
80 netdev_dev->hwaddr[1] = 0x55;
81 netdev_dev->hwaddr[2] = n >> 24;
82 netdev_dev->hwaddr[3] = n >> 16;
83 netdev_dev->hwaddr[4] = n >> 8;
84 netdev_dev->hwaddr[5] = n;
85 netdev_dev->mtu = 1500;
86 netdev_dev->flags = 0;
87 netdev_dev->change_seq = 1;
91 *netdev_devp = &netdev_dev->netdev_dev;
97 netdev_dummy_destroy(struct netdev_dev *netdev_dev_)
99 struct netdev_dev_dummy *netdev_dev = netdev_dev_dummy_cast(netdev_dev_);
105 netdev_dummy_open(struct netdev_dev *netdev_dev_, struct netdev **netdevp)
107 struct netdev_dummy *netdev;
109 netdev = xmalloc(sizeof *netdev);
110 netdev_init(&netdev->netdev, netdev_dev_);
112 *netdevp = &netdev->netdev;
117 netdev_dummy_close(struct netdev *netdev_)
119 struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
124 netdev_dummy_listen(struct netdev *netdev_ OVS_UNUSED)
126 /* It's OK to listen on a dummy device. It just never receives any
132 netdev_dummy_recv(struct netdev *netdev_ OVS_UNUSED,
133 void *buffer OVS_UNUSED, size_t size OVS_UNUSED)
135 /* A dummy device never receives any packets. */
140 netdev_dummy_set_etheraddr(struct netdev *netdev,
141 const uint8_t mac[ETH_ADDR_LEN])
143 struct netdev_dev_dummy *dev =
144 netdev_dev_dummy_cast(netdev_get_dev(netdev));
146 if (!eth_addr_equals(dev->hwaddr, mac)) {
147 memcpy(dev->hwaddr, mac, ETH_ADDR_LEN);
148 netdev_dummy_poll_notify(netdev);
155 netdev_dummy_get_etheraddr(const struct netdev *netdev,
156 uint8_t mac[ETH_ADDR_LEN])
158 const struct netdev_dev_dummy *dev =
159 netdev_dev_dummy_cast(netdev_get_dev(netdev));
161 memcpy(mac, dev->hwaddr, ETH_ADDR_LEN);
166 netdev_dummy_get_mtu(const struct netdev *netdev, int *mtup)
168 const struct netdev_dev_dummy *dev =
169 netdev_dev_dummy_cast(netdev_get_dev(netdev));
176 netdev_dummy_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
178 const struct netdev_dev_dummy *dev =
179 netdev_dev_dummy_cast(netdev_get_dev(netdev));
186 netdev_dummy_set_stats(struct netdev *netdev, const struct netdev_stats *stats)
188 struct netdev_dev_dummy *dev =
189 netdev_dev_dummy_cast(netdev_get_dev(netdev));
196 netdev_dummy_update_flags(struct netdev *netdev,
197 enum netdev_flags off, enum netdev_flags on,
198 enum netdev_flags *old_flagsp)
200 struct netdev_dev_dummy *dev =
201 netdev_dev_dummy_cast(netdev_get_dev(netdev));
203 if ((off | on) & ~(NETDEV_UP | NETDEV_PROMISC)) {
207 *old_flagsp = dev->flags;
210 if (*old_flagsp != dev->flags) {
211 netdev_dummy_poll_notify(netdev);
217 netdev_dummy_change_seq(const struct netdev *netdev)
219 return netdev_dev_dummy_cast(netdev_get_dev(netdev))->change_seq;
222 /* Helper functions. */
225 netdev_dummy_poll_notify(const struct netdev *netdev)
227 struct netdev_dev_dummy *dev =
228 netdev_dev_dummy_cast(netdev_get_dev(netdev));
231 if (!dev->change_seq) {
236 static const struct netdev_class dummy_class = {
243 netdev_dummy_destroy,
244 NULL, /* set_config */
245 NULL, /* config_equal */
250 NULL, /* enumerate */
252 netdev_dummy_listen, /* listen */
253 netdev_dummy_recv, /* recv */
254 NULL, /* recv_wait */
258 NULL, /* send_wait */
260 netdev_dummy_set_etheraddr,
261 netdev_dummy_get_etheraddr,
262 netdev_dummy_get_mtu,
263 NULL, /* get_ifindex */
264 NULL, /* get_carrier */
265 NULL, /* get_miimon */
266 netdev_dummy_get_stats,
267 netdev_dummy_set_stats,
269 NULL, /* get_features */
270 NULL, /* set_advertisements */
271 NULL, /* get_vlan_vid */
273 NULL, /* set_policing */
274 NULL, /* get_qos_types */
275 NULL, /* get_qos_capabilities */
278 NULL, /* get_queue */
279 NULL, /* set_queue */
280 NULL, /* delete_queue */
281 NULL, /* get_queue_stats */
282 NULL, /* dump_queues */
283 NULL, /* dump_queue_stats */
288 NULL, /* add_router */
289 NULL, /* get_next_hop */
290 NULL, /* get_status */
291 NULL, /* arp_lookup */
293 netdev_dummy_update_flags,
295 netdev_dummy_change_seq
299 netdev_dummy_register(void)
301 netdev_register_provider(&dummy_class);