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/*
* Copyright (c) 2010, 2011 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include "dummy.h"
#include <errno.h>
#include "list.h"
#include "netdev-provider.h"
#include "packets.h"
#include "shash.h"
#include "vlog.h"
VLOG_DEFINE_THIS_MODULE(netdev_dummy);
struct netdev_dev_dummy {
struct netdev_dev netdev_dev;
uint8_t hwaddr[ETH_ADDR_LEN];
int mtu;
struct netdev_stats stats;
enum netdev_flags flags;
unsigned int change_seq;
};
struct netdev_dummy {
struct netdev netdev;
};
static int netdev_dummy_create(const struct netdev_class *, const char *,
struct netdev_dev **);
static void netdev_dummy_poll_notify(const struct netdev *);
static bool
is_dummy_class(const struct netdev_class *class)
{
return class->create == netdev_dummy_create;
}
static struct netdev_dev_dummy *
netdev_dev_dummy_cast(const struct netdev_dev *netdev_dev)
{
assert(is_dummy_class(netdev_dev_get_class(netdev_dev)));
return CONTAINER_OF(netdev_dev, struct netdev_dev_dummy, netdev_dev);
}
static struct netdev_dummy *
netdev_dummy_cast(const struct netdev *netdev)
{
struct netdev_dev *netdev_dev = netdev_get_dev(netdev);
assert(is_dummy_class(netdev_dev_get_class(netdev_dev)));
return CONTAINER_OF(netdev, struct netdev_dummy, netdev);
}
static int
netdev_dummy_create(const struct netdev_class *class, const char *name,
struct netdev_dev **netdev_devp)
{
static unsigned int n = 0xaa550000;
struct netdev_dev_dummy *netdev_dev;
netdev_dev = xzalloc(sizeof *netdev_dev);
netdev_dev_init(&netdev_dev->netdev_dev, name, class);
netdev_dev->hwaddr[0] = 0xaa;
netdev_dev->hwaddr[1] = 0x55;
netdev_dev->hwaddr[2] = n >> 24;
netdev_dev->hwaddr[3] = n >> 16;
netdev_dev->hwaddr[4] = n >> 8;
netdev_dev->hwaddr[5] = n;
netdev_dev->mtu = 1500;
netdev_dev->flags = 0;
netdev_dev->change_seq = 1;
n++;
*netdev_devp = &netdev_dev->netdev_dev;
return 0;
}
static void
netdev_dummy_destroy(struct netdev_dev *netdev_dev_)
{
struct netdev_dev_dummy *netdev_dev = netdev_dev_dummy_cast(netdev_dev_);
free(netdev_dev);
}
static int
netdev_dummy_open(struct netdev_dev *netdev_dev_, struct netdev **netdevp)
{
struct netdev_dummy *netdev;
netdev = xmalloc(sizeof *netdev);
netdev_init(&netdev->netdev, netdev_dev_);
*netdevp = &netdev->netdev;
return 0;
}
static void
netdev_dummy_close(struct netdev *netdev_)
{
struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
free(netdev);
}
static int
netdev_dummy_listen(struct netdev *netdev_ OVS_UNUSED)
{
/* It's OK to listen on a dummy device. It just never receives any
* packets. */
return 0;
}
static int
netdev_dummy_recv(struct netdev *netdev_ OVS_UNUSED,
void *buffer OVS_UNUSED, size_t size OVS_UNUSED)
{
/* A dummy device never receives any packets. */
return -EAGAIN;
}
static int
netdev_dummy_set_etheraddr(struct netdev *netdev,
const uint8_t mac[ETH_ADDR_LEN])
{
struct netdev_dev_dummy *dev =
netdev_dev_dummy_cast(netdev_get_dev(netdev));
if (!eth_addr_equals(dev->hwaddr, mac)) {
memcpy(dev->hwaddr, mac, ETH_ADDR_LEN);
netdev_dummy_poll_notify(netdev);
}
return 0;
}
static int
netdev_dummy_get_etheraddr(const struct netdev *netdev,
uint8_t mac[ETH_ADDR_LEN])
{
const struct netdev_dev_dummy *dev =
netdev_dev_dummy_cast(netdev_get_dev(netdev));
memcpy(mac, dev->hwaddr, ETH_ADDR_LEN);
return 0;
}
static int
netdev_dummy_get_mtu(const struct netdev *netdev, int *mtup)
{
const struct netdev_dev_dummy *dev =
netdev_dev_dummy_cast(netdev_get_dev(netdev));
*mtup = dev->mtu;
return 0;
}
static int
netdev_dummy_set_mtu(const struct netdev *netdev, int mtu)
{
struct netdev_dev_dummy *dev =
netdev_dev_dummy_cast(netdev_get_dev(netdev));
dev->mtu = mtu;
return 0;
}
static int
netdev_dummy_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
{
const struct netdev_dev_dummy *dev =
netdev_dev_dummy_cast(netdev_get_dev(netdev));
*stats = dev->stats;
return 0;
}
static int
netdev_dummy_set_stats(struct netdev *netdev, const struct netdev_stats *stats)
{
struct netdev_dev_dummy *dev =
netdev_dev_dummy_cast(netdev_get_dev(netdev));
dev->stats = *stats;
return 0;
}
static int
netdev_dummy_update_flags(struct netdev *netdev,
enum netdev_flags off, enum netdev_flags on,
enum netdev_flags *old_flagsp)
{
struct netdev_dev_dummy *dev =
netdev_dev_dummy_cast(netdev_get_dev(netdev));
if ((off | on) & ~(NETDEV_UP | NETDEV_PROMISC)) {
return EINVAL;
}
*old_flagsp = dev->flags;
dev->flags |= on;
dev->flags &= ~off;
if (*old_flagsp != dev->flags) {
netdev_dummy_poll_notify(netdev);
}
return 0;
}
static unsigned int
netdev_dummy_change_seq(const struct netdev *netdev)
{
return netdev_dev_dummy_cast(netdev_get_dev(netdev))->change_seq;
}
/* Helper functions. */
static void
netdev_dummy_poll_notify(const struct netdev *netdev)
{
struct netdev_dev_dummy *dev =
netdev_dev_dummy_cast(netdev_get_dev(netdev));
dev->change_seq++;
if (!dev->change_seq) {
dev->change_seq++;
}
}
static const struct netdev_class dummy_class = {
"dummy",
NULL, /* init */
NULL, /* run */
NULL, /* wait */
netdev_dummy_create,
netdev_dummy_destroy,
NULL, /* get_config */
NULL, /* set_config */
netdev_dummy_open,
netdev_dummy_close,
netdev_dummy_listen, /* listen */
netdev_dummy_recv, /* recv */
NULL, /* recv_wait */
NULL, /* drain */
NULL, /* send */
NULL, /* send_wait */
netdev_dummy_set_etheraddr,
netdev_dummy_get_etheraddr,
netdev_dummy_get_mtu,
netdev_dummy_set_mtu,
NULL, /* get_ifindex */
NULL, /* get_carrier */
NULL, /* get_carrier_resets */
NULL, /* get_miimon */
netdev_dummy_get_stats,
netdev_dummy_set_stats,
NULL, /* get_features */
NULL, /* set_advertisements */
NULL, /* set_policing */
NULL, /* get_qos_types */
NULL, /* get_qos_capabilities */
NULL, /* get_qos */
NULL, /* set_qos */
NULL, /* get_queue */
NULL, /* set_queue */
NULL, /* delete_queue */
NULL, /* get_queue_stats */
NULL, /* dump_queues */
NULL, /* dump_queue_stats */
NULL, /* get_in4 */
NULL, /* set_in4 */
NULL, /* get_in6 */
NULL, /* add_router */
NULL, /* get_next_hop */
NULL, /* get_status */
NULL, /* arp_lookup */
netdev_dummy_update_flags,
netdev_dummy_change_seq
};
void
netdev_dummy_register(void)
{
netdev_register_provider(&dummy_class);
}
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