Add new "dummy" netdev and dpif implementations for use in unit tests.

1 files changed, 335 insertions, 0 deletions

diff --git a/lib/netdev-dummy.c b/lib/netdev-dummy.c
new file mode 100644
index 00000000..ddcbe363
--- /dev/null
+++ b/lib/netdev-dummy.c
@@ -0,0 +1,335 @@
+/*
+ * Copyright (c) 2010 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_dummy_notifier {
+    struct netdev_notifier notifier;
+    struct list list_node;
+    struct shash_node *shash_node;
+};
+
+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;
+};
+
+struct netdev_dummy {
+    struct netdev netdev;
+};
+
+static struct shash netdev_dummy_notifiers =
+    SHASH_INITIALIZER(&netdev_dummy_notifiers);
+
+static int netdev_dummy_create(const struct netdev_class *, const char *,
+                               const struct shash *, 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,
+                    const struct shash *args OVS_UNUSED,
+                    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;
+
+    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_, int ethertype OVS_UNUSED,
+                  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_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_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 int
+netdev_dummy_poll_add(struct netdev *netdev,
+                      void (*cb)(struct netdev_notifier *), void *aux,
+                      struct netdev_notifier **notifierp)
+{
+    const char *name = netdev_get_name(netdev);
+    struct netdev_dummy_notifier *notifier;
+    struct list *list;
+    struct shash_node *shash_node;
+
+    shash_node = shash_find_data(&netdev_dummy_notifiers, name);
+    if (!shash_node) {
+        list = xmalloc(sizeof *list);
+        list_init(list);
+        shash_node = shash_add(&netdev_dummy_notifiers, name, list);
+    } else {
+        list = shash_node->data;
+    }
+
+    notifier = xmalloc(sizeof *notifier);
+    netdev_notifier_init(&notifier->notifier, netdev, cb, aux);
+    list_push_back(list, &notifier->list_node);
+    notifier->shash_node = shash_node;
+
+    *notifierp = &notifier->notifier;
+
+    return 0;
+}
+
+static void
+netdev_dummy_poll_remove(struct netdev_notifier *notifier_)
+{
+    struct netdev_dummy_notifier *notifier =
+        CONTAINER_OF(notifier_, struct netdev_dummy_notifier, notifier);
+
+    struct list *list;
+
+    list = list_remove(&notifier->list_node);
+    if (list_is_empty(list)) {
+        shash_delete(&netdev_dummy_notifiers, notifier->shash_node);
+        free(list);
+    }
+
+    free(notifier);
+}
+
+/* Helper functions. */
+
+static void
+netdev_dummy_poll_notify(const struct netdev *netdev)
+{
+    const char *name = netdev_get_name(netdev);
+    struct list *list = shash_find_data(&netdev_dummy_notifiers, name);
+
+    if (list) {
+        struct netdev_dummy_notifier *notifier;
+
+        LIST_FOR_EACH (notifier, list_node, list) {
+            struct netdev_notifier *n = &notifier->notifier;
+            n->cb(n);
+        }
+    }
+}
+
+static const struct netdev_class dummy_class = {
+    "dummy",
+    NULL,                       /* init */
+    NULL,                       /* run */
+    NULL,                       /* wait */
+
+    netdev_dummy_create,
+    netdev_dummy_destroy,
+    NULL,
+
+    netdev_dummy_open,
+    netdev_dummy_close,
+
+    NULL,                       /* enumerate */
+
+    NULL,                       /* recv */
+    NULL,                       /* recv_wait */
+    NULL,                       /* drain */
+
+    NULL,                       /* send */
+    NULL,                       /* send_wait */
+
+    netdev_dummy_set_etheraddr,
+    netdev_dummy_get_etheraddr,
+    netdev_dummy_get_mtu,
+    NULL,                       /* get_ifindex */
+    NULL,                       /* get_carrier */
+    netdev_dummy_get_stats,
+    netdev_dummy_set_stats,
+
+    NULL,                       /* get_features */
+    NULL,                       /* set_advertisements */
+    NULL,                       /* get_vlan_vid */
+
+    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,                       /* arp_lookup */
+
+    netdev_dummy_update_flags,
+
+    netdev_dummy_poll_add,
+    netdev_dummy_poll_remove,
+};
+
+void
+netdev_dummy_register(void)
+{
+    netdev_register_provider(&dummy_class);
+}