X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fnetdev-dummy.c;h=a940df81c46951809ff2d7901453edbccd126c9c;hb=2b13d312fc4d6e5eb1d0e3004fa523bb0c0ba544;hp=c2c531116cc4426a60490f9b683da741d94deeb0;hpb=9b02078077b62e4277e84c7f39382ce09986cf6b;p=sliver-openvswitch.git

diff --git a/lib/netdev-dummy.c b/lib/netdev-dummy.c
index c2c531116..a940df81c 100644
--- a/lib/netdev-dummy.c
+++ b/lib/netdev-dummy.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2011 Nicira Networks.
+ * Copyright (c) 2010, 2011, 2012, 2013 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,30 +20,68 @@
 
 #include <errno.h>
 
+#include "flow.h"
 #include "list.h"
 #include "netdev-provider.h"
+#include "netdev-vport.h"
+#include "odp-util.h"
+#include "ofp-print.h"
+#include "ofpbuf.h"
 #include "packets.h"
+#include "poll-loop.h"
 #include "shash.h"
+#include "sset.h"
+#include "stream.h"
+#include "unaligned.h"
+#include "unixctl.h"
 #include "vlog.h"
 
 VLOG_DEFINE_THIS_MODULE(netdev_dummy);
 
-struct netdev_dev_dummy {
-    struct netdev_dev netdev_dev;
+struct dummy_stream {
+    struct stream *stream;
+    struct ofpbuf rxbuf;
+    struct list txq;
+};
+
+struct netdev_dummy {
+    struct netdev up;
     uint8_t hwaddr[ETH_ADDR_LEN];
     int mtu;
     struct netdev_stats stats;
     enum netdev_flags flags;
     unsigned int change_seq;
+    int ifindex;
+
+    struct pstream *pstream;
+    struct dummy_stream *streams;
+    size_t n_streams;
+
+    struct list rxes;           /* List of child "netdev_rx_dummy"s. */
 };
 
-struct netdev_dummy {
-    struct netdev netdev;
+/* Max 'recv_queue_len' in struct netdev_dummy. */
+#define NETDEV_DUMMY_MAX_QUEUE 100
+
+struct netdev_rx_dummy {
+    struct netdev_rx up;
+    struct list node;           /* In netdev_dummy's "rxes" list. */
+    struct list recv_queue;
+    int recv_queue_len;         /* list_size(&recv_queue). */
+    bool listening;
 };
 
+static struct shash dummy_netdevs = SHASH_INITIALIZER(&dummy_netdevs);
+
+static const struct netdev_rx_class netdev_rx_dummy_class;
+
+static unixctl_cb_func netdev_dummy_set_admin_state;
 static int netdev_dummy_create(const struct netdev_class *, const char *,
-                               struct netdev_dev **);
-static void netdev_dummy_poll_notify(const struct netdev *);
+                               struct netdev **);
+static void netdev_dummy_poll_notify(struct netdev_dummy *);
+static void netdev_dummy_queue_packet(struct netdev_dummy *, struct ofpbuf *);
+
+static void dummy_stream_close(struct dummy_stream *);
 
 static bool
 is_dummy_class(const struct netdev_class *class)
@@ -51,100 +89,362 @@ 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)
+static struct netdev_dummy *
+netdev_dummy_cast(const struct netdev *netdev)
 {
-    assert(is_dummy_class(netdev_dev_get_class(netdev_dev)));
-    return CONTAINER_OF(netdev_dev, struct netdev_dev_dummy, netdev_dev);
+    ovs_assert(is_dummy_class(netdev_get_class(netdev)));
+    return CONTAINER_OF(netdev, struct netdev_dummy, up);
 }
 
-static struct netdev_dummy *
-netdev_dummy_cast(const struct netdev *netdev)
+static struct netdev_rx_dummy *
+netdev_rx_dummy_cast(const struct netdev_rx *rx)
 {
-    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);
+    netdev_rx_assert_class(rx, &netdev_rx_dummy_class);
+    return CONTAINER_OF(rx, struct netdev_rx_dummy, up);
+}
+
+static void
+netdev_dummy_run(void)
+{
+    struct shash_node *node;
+
+    SHASH_FOR_EACH (node, &dummy_netdevs) {
+        struct netdev_dummy *dev = node->data;
+        size_t i;
+
+        if (dev->pstream) {
+            struct stream *new_stream;
+            int error;
+
+            error = pstream_accept(dev->pstream, &new_stream);
+            if (!error) {
+                struct dummy_stream *s;
+
+                dev->streams = xrealloc(dev->streams,
+                                        ((dev->n_streams + 1)
+                                         * sizeof *dev->streams));
+                s = &dev->streams[dev->n_streams++];
+                s->stream = new_stream;
+                ofpbuf_init(&s->rxbuf, 2048);
+                list_init(&s->txq);
+            } else if (error != EAGAIN) {
+                VLOG_WARN("%s: accept failed (%s)",
+                          pstream_get_name(dev->pstream), ovs_strerror(error));
+                pstream_close(dev->pstream);
+                dev->pstream = NULL;
+            }
+        }
+
+        for (i = 0; i < dev->n_streams; i++) {
+            struct dummy_stream *s = &dev->streams[i];
+            int error = 0;
+            size_t n;
+
+            stream_run(s->stream);
+
+            if (!list_is_empty(&s->txq)) {
+                struct ofpbuf *txbuf;
+                int retval;
+
+                txbuf = ofpbuf_from_list(list_front(&s->txq));
+                retval = stream_send(s->stream, txbuf->data, txbuf->size);
+                if (retval > 0) {
+                    ofpbuf_pull(txbuf, retval);
+                    if (!txbuf->size) {
+                        list_remove(&txbuf->list_node);
+                        ofpbuf_delete(txbuf);
+                    }
+                } else if (retval != -EAGAIN) {
+                    error = -retval;
+                }
+            }
+
+            if (!error) {
+                if (s->rxbuf.size < 2) {
+                    n = 2 - s->rxbuf.size;
+                } else {
+                    uint16_t frame_len;
+
+                    frame_len = ntohs(get_unaligned_be16(s->rxbuf.data));
+                    if (frame_len < ETH_HEADER_LEN) {
+                        error = EPROTO;
+                        n = 0;
+                    } else {
+                        n = (2 + frame_len) - s->rxbuf.size;
+                    }
+                }
+            }
+            if (!error) {
+                int retval;
+
+                ofpbuf_prealloc_tailroom(&s->rxbuf, n);
+                retval = stream_recv(s->stream, ofpbuf_tail(&s->rxbuf), n);
+                if (retval > 0) {
+                    s->rxbuf.size += retval;
+                    if (retval == n && s->rxbuf.size > 2) {
+                        ofpbuf_pull(&s->rxbuf, 2);
+                        netdev_dummy_queue_packet(dev,
+                                                  ofpbuf_clone(&s->rxbuf));
+                        ofpbuf_clear(&s->rxbuf);
+                    }
+                } else if (retval != -EAGAIN) {
+                    error = (retval < 0 ? -retval
+                             : s->rxbuf.size ? EPROTO
+                             : EOF);
+                }
+            }
+
+            if (error) {
+                VLOG_DBG("%s: closing connection (%s)",
+                         stream_get_name(s->stream),
+                         ovs_retval_to_string(error));
+                dummy_stream_close(&dev->streams[i]);
+                dev->streams[i] = dev->streams[--dev->n_streams];
+            }
+        }
+    }
+}
+
+static void
+dummy_stream_close(struct dummy_stream *s)
+{
+    stream_close(s->stream);
+    ofpbuf_uninit(&s->rxbuf);
+    ofpbuf_list_delete(&s->txq);
+}
+
+static void
+netdev_dummy_wait(void)
+{
+    struct shash_node *node;
+
+    SHASH_FOR_EACH (node, &dummy_netdevs) {
+        struct netdev_dummy *dev = node->data;
+        size_t i;
+
+        if (dev->pstream) {
+            pstream_wait(dev->pstream);
+        }
+        for (i = 0; i < dev->n_streams; i++) {
+            struct dummy_stream *s = &dev->streams[i];
+
+            stream_run_wait(s->stream);
+            if (!list_is_empty(&s->txq)) {
+                stream_send_wait(s->stream);
+            }
+            stream_recv_wait(s->stream);
+        }
+    }
 }
 
 static int
 netdev_dummy_create(const struct netdev_class *class, const char *name,
-                    struct netdev_dev **netdev_devp)
+                    struct netdev **netdevp)
 {
     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;
+    struct netdev_dummy *netdev;
+
+    netdev = xzalloc(sizeof *netdev);
+    netdev_init(&netdev->up, name, class);
+    netdev->hwaddr[0] = 0xaa;
+    netdev->hwaddr[1] = 0x55;
+    netdev->hwaddr[2] = n >> 24;
+    netdev->hwaddr[3] = n >> 16;
+    netdev->hwaddr[4] = n >> 8;
+    netdev->hwaddr[5] = n;
+    netdev->mtu = 1500;
+    netdev->flags = 0;
+    netdev->change_seq = 1;
+    netdev->ifindex = -EOPNOTSUPP;
+
+    netdev->pstream = NULL;
+    netdev->streams = NULL;
+    netdev->n_streams = 0;
+
+    list_init(&netdev->rxes);
+
+    shash_add(&dummy_netdevs, name, netdev);
 
     n++;
 
-    *netdev_devp = &netdev_dev->netdev_dev;
+    *netdevp = &netdev->up;
 
     return 0;
 }
 
 static void
-netdev_dummy_destroy(struct netdev_dev *netdev_dev_)
+netdev_dummy_destroy(struct netdev *netdev_)
 {
-    struct netdev_dev_dummy *netdev_dev = netdev_dev_dummy_cast(netdev_dev_);
+    struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
+    size_t i;
 
-    free(netdev_dev);
+    shash_find_and_delete(&dummy_netdevs,
+                          netdev_get_name(netdev_));
+    pstream_close(netdev->pstream);
+    for (i = 0; i < netdev->n_streams; i++) {
+        dummy_stream_close(&netdev->streams[i]);
+    }
+    free(netdev->streams);
+    free(netdev);
 }
 
 static int
-netdev_dummy_open(struct netdev_dev *netdev_dev_, struct netdev **netdevp)
+netdev_dummy_get_config(const struct netdev *netdev_, struct smap *args)
 {
-    struct netdev_dummy *netdev;
+    struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
 
-    netdev = xmalloc(sizeof *netdev);
-    netdev_init(&netdev->netdev, netdev_dev_);
+    if (netdev->ifindex >= 0) {
+        smap_add_format(args, "ifindex", "%d", netdev->ifindex);
+    }
+    if (netdev->pstream) {
+        smap_add(args, "pstream", pstream_get_name(netdev->pstream));
+    }
+    return 0;
+}
 
-    *netdevp = &netdev->netdev;
+static int
+netdev_dummy_set_config(struct netdev *netdev_, const struct smap *args)
+{
+    struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
+    const char *pstream;
+
+    netdev->ifindex = smap_get_int(args, "ifindex", -EOPNOTSUPP);
+
+    pstream = smap_get(args, "pstream");
+    if (!pstream
+        || !netdev->pstream
+        || strcmp(pstream_get_name(netdev->pstream), pstream)) {
+        pstream_close(netdev->pstream);
+        netdev->pstream = NULL;
+
+        if (pstream) {
+            int error;
+
+            error = pstream_open(pstream, &netdev->pstream, DSCP_DEFAULT);
+            if (error) {
+                VLOG_WARN("%s: open failed (%s)",
+                          pstream, ovs_strerror(error));
+            }
+        }
+    }
     return 0;
 }
 
-static void
-netdev_dummy_close(struct netdev *netdev_)
+static int
+netdev_dummy_rx_open(struct netdev *netdev_, struct netdev_rx **rxp)
 {
     struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
-    free(netdev);
+    struct netdev_rx_dummy *rx;
+
+    rx = xmalloc(sizeof *rx);
+    netdev_rx_init(&rx->up, &netdev->up, &netdev_rx_dummy_class);
+    list_push_back(&netdev->rxes, &rx->node);
+    list_init(&rx->recv_queue);
+    rx->recv_queue_len = 0;
+
+    *rxp = &rx->up;
+    return 0;
+}
+
+static int
+netdev_rx_dummy_recv(struct netdev_rx *rx_, void *buffer, size_t size)
+{
+    struct netdev_rx_dummy *rx = netdev_rx_dummy_cast(rx_);
+    struct ofpbuf *packet;
+    size_t packet_size;
+
+    if (list_is_empty(&rx->recv_queue)) {
+        return -EAGAIN;
+    }
+
+    packet = ofpbuf_from_list(list_pop_front(&rx->recv_queue));
+    rx->recv_queue_len--;
+    if (packet->size > size) {
+        return -EMSGSIZE;
+    }
+    packet_size = packet->size;
+
+    memcpy(buffer, packet->data, packet->size);
+    ofpbuf_delete(packet);
+
+    return packet_size;
+}
+
+static void
+netdev_rx_dummy_destroy(struct netdev_rx *rx_)
+{
+    struct netdev_rx_dummy *rx = netdev_rx_dummy_cast(rx_);
+    list_remove(&rx->node);
+    ofpbuf_list_delete(&rx->recv_queue);
+    free(rx);
+}
+
+static void
+netdev_rx_dummy_wait(struct netdev_rx *rx_)
+{
+    struct netdev_rx_dummy *rx = netdev_rx_dummy_cast(rx_);
+    if (!list_is_empty(&rx->recv_queue)) {
+        poll_immediate_wake();
+    }
 }
 
 static int
-netdev_dummy_listen(struct netdev *netdev_ OVS_UNUSED)
+netdev_rx_dummy_drain(struct netdev_rx *rx_)
 {
-    /* It's OK to listen on a dummy device.  It just never receives any
-     * packets. */
+    struct netdev_rx_dummy *rx = netdev_rx_dummy_cast(rx_);
+    ofpbuf_list_delete(&rx->recv_queue);
+    rx->recv_queue_len = 0;
     return 0;
 }
 
 static int
-netdev_dummy_recv(struct netdev *netdev_ OVS_UNUSED,
-                  void *buffer OVS_UNUSED, size_t size OVS_UNUSED)
+netdev_dummy_send(struct netdev *netdev, const void *buffer, size_t size)
 {
-    /* A dummy device never receives any packets. */
-    return -EAGAIN;
+    struct netdev_dummy *dev = netdev_dummy_cast(netdev);
+    size_t i;
+
+    if (size < ETH_HEADER_LEN) {
+        return EMSGSIZE;
+    } else {
+        const struct eth_header *eth = buffer;
+        int max_size;
+
+        max_size = dev->mtu + ETH_HEADER_LEN;
+        if (eth->eth_type == htons(ETH_TYPE_VLAN)) {
+            max_size += VLAN_HEADER_LEN;
+        }
+        if (size > max_size) {
+            return EMSGSIZE;
+        }
+    }
+
+    dev->stats.tx_packets++;
+    dev->stats.tx_bytes += size;
+
+    for (i = 0; i < dev->n_streams; i++) {
+        struct dummy_stream *s = &dev->streams[i];
+
+        if (list_size(&s->txq) < NETDEV_DUMMY_MAX_QUEUE) {
+            struct ofpbuf *b;
+
+            b = ofpbuf_clone_data_with_headroom(buffer, size, 2);
+            put_unaligned_be16(ofpbuf_push_uninit(b, 2), htons(size));
+            list_push_back(&s->txq, &b->list_node);
+        }
+    }
+
+    return 0;
 }
 
 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));
+    struct netdev_dummy *dev = netdev_dummy_cast(netdev);
 
     if (!eth_addr_equals(dev->hwaddr, mac)) {
         memcpy(dev->hwaddr, mac, ETH_ADDR_LEN);
-        netdev_dummy_poll_notify(netdev);
+        netdev_dummy_poll_notify(dev);
     }
 
     return 0;
@@ -154,8 +454,7 @@ 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));
+    const struct netdev_dummy *dev = netdev_dummy_cast(netdev);
 
     memcpy(mac, dev->hwaddr, ETH_ADDR_LEN);
     return 0;
@@ -164,8 +463,7 @@ netdev_dummy_get_etheraddr(const struct netdev *netdev,
 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));
+    const struct netdev_dummy *dev = netdev_dummy_cast(netdev);
 
     *mtup = dev->mtu;
     return 0;
@@ -174,8 +472,7 @@ netdev_dummy_get_mtu(const struct netdev *netdev, int *mtup)
 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));
+    struct netdev_dummy *dev = netdev_dummy_cast(netdev);
 
     dev->mtu = mtu;
     return 0;
@@ -184,8 +481,7 @@ netdev_dummy_set_mtu(const struct netdev *netdev, int mtu)
 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));
+    const struct netdev_dummy *dev = netdev_dummy_cast(netdev);
 
     *stats = dev->stats;
     return 0;
@@ -194,29 +490,35 @@ netdev_dummy_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
 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));
+    struct netdev_dummy *dev = netdev_dummy_cast(netdev);
 
     dev->stats = *stats;
     return 0;
 }
 
 static int
-netdev_dummy_update_flags(struct netdev *netdev,
+netdev_dummy_get_ifindex(const struct netdev *netdev)
+{
+    struct netdev_dummy *dev = netdev_dummy_cast(netdev);
+
+    return dev->ifindex;
+}
+
+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));
+    struct netdev_dummy *netdev = netdev_dummy_cast(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) {
+    *old_flagsp = netdev->flags;
+    netdev->flags |= on;
+    netdev->flags &= ~off;
+    if (*old_flagsp != netdev->flags) {
         netdev_dummy_poll_notify(netdev);
     }
     return 0;
@@ -225,17 +527,14 @@ netdev_dummy_update_flags(struct netdev *netdev,
 static unsigned int
 netdev_dummy_change_seq(const struct netdev *netdev)
 {
-    return netdev_dev_dummy_cast(netdev_get_dev(netdev))->change_seq;
+    return netdev_dummy_cast(netdev)->change_seq;
 }
 
 /* Helper functions. */
 
 static void
-netdev_dummy_poll_notify(const struct netdev *netdev)
+netdev_dummy_poll_notify(struct netdev_dummy *dev)
 {
-    struct netdev_dev_dummy *dev =
-        netdev_dev_dummy_cast(netdev_get_dev(netdev));
-
     dev->change_seq++;
     if (!dev->change_seq) {
         dev->change_seq++;
@@ -245,40 +544,33 @@ netdev_dummy_poll_notify(const struct netdev *netdev)
 static const struct netdev_class dummy_class = {
     "dummy",
     NULL,                       /* init */
-    NULL,                       /* run */
-    NULL,                       /* wait */
+    netdev_dummy_run,
+    netdev_dummy_wait,
 
     netdev_dummy_create,
     netdev_dummy_destroy,
-    NULL,                       /* get_config */
-    NULL,                       /* set_config */
+    netdev_dummy_get_config,
+    netdev_dummy_set_config,
+    NULL,                       /* get_tunnel_config */
 
-    netdev_dummy_open,
-    netdev_dummy_close,
+    netdev_dummy_rx_open,
 
-    NULL,                       /* enumerate */
-
-    netdev_dummy_listen,        /* listen */
-    netdev_dummy_recv,          /* recv */
-    NULL,                       /* recv_wait */
-    NULL,                       /* drain */
-
-    NULL,                       /* send */
+    netdev_dummy_send,          /* send */
     NULL,                       /* send_wait */
 
     netdev_dummy_set_etheraddr,
     netdev_dummy_get_etheraddr,
     netdev_dummy_get_mtu,
     netdev_dummy_set_mtu,
-    NULL,                       /* get_ifindex */
+    netdev_dummy_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,                       /* get_vlan_vid */
 
     NULL,                       /* set_policing */
     NULL,                       /* get_qos_types */
@@ -305,8 +597,187 @@ static const struct netdev_class dummy_class = {
     netdev_dummy_change_seq
 };
 
+static const struct netdev_rx_class netdev_rx_dummy_class = {
+    netdev_rx_dummy_destroy,
+    netdev_rx_dummy_recv,
+    netdev_rx_dummy_wait,
+    netdev_rx_dummy_drain,
+};
+
+static struct ofpbuf *
+eth_from_packet_or_flow(const char *s)
+{
+    enum odp_key_fitness fitness;
+    struct ofpbuf *packet;
+    struct ofpbuf odp_key;
+    struct flow flow;
+    int error;
+
+    if (!eth_from_hex(s, &packet)) {
+        return packet;
+    }
+
+    /* Convert string to datapath key.
+     *
+     * It would actually be nicer to parse an OpenFlow-like flow key here, but
+     * the code for that currently calls exit() on parse error.  We have to
+     * settle for parsing a datapath key for now.
+     */
+    ofpbuf_init(&odp_key, 0);
+    error = odp_flow_from_string(s, NULL, &odp_key, NULL);
+    if (error) {
+        ofpbuf_uninit(&odp_key);
+        return NULL;
+    }
+
+    /* Convert odp_key to flow. */
+    fitness = odp_flow_key_to_flow(odp_key.data, odp_key.size, &flow);
+    if (fitness == ODP_FIT_ERROR) {
+        ofpbuf_uninit(&odp_key);
+        return NULL;
+    }
+
+    packet = ofpbuf_new(0);
+    flow_compose(packet, &flow);
+
+    ofpbuf_uninit(&odp_key);
+    return packet;
+}
+
+static void
+netdev_dummy_queue_packet__(struct netdev_rx_dummy *rx, struct ofpbuf *packet)
+{
+    list_push_back(&rx->recv_queue, &packet->list_node);
+    rx->recv_queue_len++;
+}
+
+static void
+netdev_dummy_queue_packet(struct netdev_dummy *dummy, struct ofpbuf *packet)
+{
+    struct netdev_rx_dummy *rx, *prev;
+
+    prev = NULL;
+    LIST_FOR_EACH (rx, node, &dummy->rxes) {
+        if (rx->recv_queue_len < NETDEV_DUMMY_MAX_QUEUE) {
+            if (prev) {
+                netdev_dummy_queue_packet__(prev, ofpbuf_clone(packet));
+            }
+            prev = rx;
+        }
+    }
+    if (prev) {
+        netdev_dummy_queue_packet__(prev, packet);
+    } else {
+        ofpbuf_delete(packet);
+    }
+}
+
+static void
+netdev_dummy_receive(struct unixctl_conn *conn,
+                     int argc, const char *argv[], void *aux OVS_UNUSED)
+{
+    struct netdev_dummy *dummy_dev;
+    int i;
+
+    dummy_dev = shash_find_data(&dummy_netdevs, argv[1]);
+    if (!dummy_dev) {
+        unixctl_command_reply_error(conn, "no such dummy netdev");
+        return;
+    }
+
+    for (i = 2; i < argc; i++) {
+        struct ofpbuf *packet;
+
+        packet = eth_from_packet_or_flow(argv[i]);
+        if (!packet) {
+            unixctl_command_reply_error(conn, "bad packet syntax");
+            return;
+        }
+
+        dummy_dev->stats.rx_packets++;
+        dummy_dev->stats.rx_bytes += packet->size;
+
+        netdev_dummy_queue_packet(dummy_dev, packet);
+    }
+
+    unixctl_command_reply(conn, NULL);
+}
+
+static void
+netdev_dummy_set_admin_state__(struct netdev_dummy *dev, bool admin_state)
+{
+    enum netdev_flags old_flags;
+
+    if (admin_state) {
+        netdev_dummy_update_flags(&dev->up, 0, NETDEV_UP, &old_flags);
+    } else {
+        netdev_dummy_update_flags(&dev->up, NETDEV_UP, 0, &old_flags);
+    }
+}
+
+static void
+netdev_dummy_set_admin_state(struct unixctl_conn *conn, int argc,
+                             const char *argv[], void *aux OVS_UNUSED)
+{
+    bool up;
+
+    if (!strcasecmp(argv[argc - 1], "up")) {
+        up = true;
+    } else if ( !strcasecmp(argv[argc - 1], "down")) {
+        up = false;
+    } else {
+        unixctl_command_reply_error(conn, "Invalid Admin State");
+        return;
+    }
+
+    if (argc > 2) {
+        struct netdev_dummy *dummy_dev;
+
+        dummy_dev = shash_find_data(&dummy_netdevs, argv[1]);
+        if (dummy_dev) {
+            netdev_dummy_set_admin_state__(dummy_dev, up);
+        } else {
+            unixctl_command_reply_error(conn, "Unknown Dummy Interface");
+            return;
+        }
+    } else {
+        struct shash_node *node;
+
+        SHASH_FOR_EACH (node, &dummy_netdevs) {
+            netdev_dummy_set_admin_state__(node->data, up);
+        }
+    }
+    unixctl_command_reply(conn, "OK");
+}
+
 void
-netdev_dummy_register(void)
+netdev_dummy_register(bool override)
 {
+    unixctl_command_register("netdev-dummy/receive", "NAME PACKET|FLOW...",
+                             2, INT_MAX, netdev_dummy_receive, NULL);
+    unixctl_command_register("netdev-dummy/set-admin-state",
+                             "[netdev] up|down", 1, 2,
+                             netdev_dummy_set_admin_state, NULL);
+
+    if (override) {
+        struct sset types;
+        const char *type;
+
+        sset_init(&types);
+        netdev_enumerate_types(&types);
+        SSET_FOR_EACH (type, &types) {
+            if (!netdev_unregister_provider(type)) {
+                struct netdev_class *class;
+
+                class = xmalloc(sizeof *class);
+                *class = dummy_class;
+                class->type = xstrdup(type);
+                netdev_register_provider(class);
+            }
+        }
+        sset_destroy(&types);
+    }
     netdev_register_provider(&dummy_class);
+
+    netdev_vport_tunnel_register();
 }