[ovs.git] / lib / netdev-dummy.c

/*
 * Copyright (c) 2010, 2011, 2012 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 "flow.h"
#include "list.h"
#include "netdev-provider.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 "unixctl.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 list devs;           /* List of child "netdev_dummy"s. */
};

struct netdev_dummy {
    struct netdev netdev;
    struct list node;           /* In netdev_dev_dummy's "devs" list. */
    struct list recv_queue;
    bool listening;
};

static struct shash dummy_netdev_devs = SHASH_INITIALIZER(&dummy_netdev_devs);

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;
    list_init(&netdev_dev->devs);

    shash_add(&dummy_netdev_devs, name, netdev_dev);

    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_);

    shash_find_and_delete(&dummy_netdev_devs,
                          netdev_dev_get_name(netdev_dev_));
    free(netdev_dev);
}

static int
netdev_dummy_open(struct netdev_dev *netdev_dev_, struct netdev **netdevp)
{
    struct netdev_dev_dummy *netdev_dev = netdev_dev_dummy_cast(netdev_dev_);
    struct netdev_dummy *netdev;

    netdev = xmalloc(sizeof *netdev);
    netdev_init(&netdev->netdev, netdev_dev_);
    list_init(&netdev->recv_queue);
    netdev->listening = false;

    *netdevp = &netdev->netdev;
    list_push_back(&netdev_dev->devs, &netdev->node);
    return 0;
}

static void
netdev_dummy_close(struct netdev *netdev_)
{
    struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
    list_remove(&netdev->node);
    ofpbuf_list_delete(&netdev->recv_queue);
    free(netdev);
}

static int
netdev_dummy_listen(struct netdev *netdev_)
{
    struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
    netdev->listening = true;
    return 0;
}

static int
netdev_dummy_recv(struct netdev *netdev_, void *buffer, size_t size)
{
    struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
    struct ofpbuf *packet;
    size_t packet_size;

    if (list_is_empty(&netdev->recv_queue)) {
        return -EAGAIN;
    }

    packet = ofpbuf_from_list(list_pop_front(&netdev->recv_queue));
    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_dummy_recv_wait(struct netdev *netdev_)
{
    struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
    if (!list_is_empty(&netdev->recv_queue)) {
        poll_immediate_wake();
    }
}

static int
netdev_dummy_drain(struct netdev *netdev_)
{
    struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
    ofpbuf_list_delete(&netdev->recv_queue);
    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));

    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;
}
\f
/* 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,
    netdev_dummy_recv,
    netdev_dummy_recv_wait,
    netdev_dummy_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
};

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_key_from_string(s, NULL, &odp_key);
    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_receive(struct unixctl_conn *conn,
                     int argc, const char *argv[], void *aux OVS_UNUSED)
{
    struct netdev_dev_dummy *dummy_dev;
    int n_listeners;
    int i;

    dummy_dev = shash_find_data(&dummy_netdev_devs, argv[1]);
    if (!dummy_dev) {
        unixctl_command_reply_error(conn, "no such dummy netdev");
        return;
    }

    n_listeners = 0;
    for (i = 2; i < argc; i++) {
        struct netdev_dummy *dev;
        struct ofpbuf *packet;

        packet = eth_from_packet_or_flow(argv[i]);
        if (!packet) {
            unixctl_command_reply_error(conn, "bad packet syntax");
            return;
        }

        n_listeners = 0;
        LIST_FOR_EACH (dev, node, &dummy_dev->devs) {
            if (dev->listening) {
                struct ofpbuf *copy = ofpbuf_clone(packet);
                list_push_back(&dev->recv_queue, &copy->list_node);
                n_listeners++;
            }
        }
        ofpbuf_delete(packet);
    }

    if (!n_listeners) {
        unixctl_command_reply(conn, "packets queued but nobody listened");
    } else {
        unixctl_command_reply(conn, "success");
    }
}

void
netdev_dummy_register(bool override)
{
    unixctl_command_register("netdev-dummy/receive", "NAME PACKET|FLOW...",
                             2, INT_MAX, netdev_dummy_receive, 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);
}
Commit	Line	Data
614c4892	1	/*
78945f19	2	* Copyright (c) 2010, 2011, 2012 Nicira Networks.
614c4892 BP	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
	19	#include "dummy.h"
	20
	21	#include <errno.h>
	22
fbac791a	23	#include "flow.h"
614c4892 BP	24	#include "list.h"
614c4892 BP	25	#include "netdev-provider.h"
fbac791a BP	26	#include "odp-util.h"
	27	#include "ofp-print.h"
	28	#include "ofpbuf.h"
614c4892	29	#include "packets.h"
fbac791a	30	#include "poll-loop.h"
614c4892	31	#include "shash.h"
0cbfe35d	32	#include "sset.h"
fbac791a	33	#include "unixctl.h"
614c4892 BP	34	#include "vlog.h"
	35
	36	VLOG_DEFINE_THIS_MODULE(netdev_dummy);
	37
614c4892 BP	38	struct netdev_dev_dummy {
	39	struct netdev_dev netdev_dev;
	40	uint8_t hwaddr[ETH_ADDR_LEN];
	41	int mtu;
	42	struct netdev_stats stats;
	43	enum netdev_flags flags;
ac4d3bcb	44	unsigned int change_seq;
fbac791a BP	45
fbac791a BP	46	struct list devs; /* List of child "netdev_dummy"s. */
614c4892 BP	47	};
	48
	49	struct netdev_dummy {
	50	struct netdev netdev;
fbac791a BP	51	struct list node; /* In netdev_dev_dummy's "devs" list. */
	52	struct list recv_queue;
	53	bool listening;
614c4892 BP	54	};
614c4892 BP	55
fbac791a BP	56	static struct shash dummy_netdev_devs = SHASH_INITIALIZER(&dummy_netdev_devs);
fbac791a BP	57
614c4892	58	static int netdev_dummy_create(const struct netdev_class , const char ,
de5cdb90	59	struct netdev_dev **);
614c4892 BP	60	static void netdev_dummy_poll_notify(const struct netdev *);
	61
	62	static bool
	63	is_dummy_class(const struct netdev_class *class)
	64	{
	65	return class->create == netdev_dummy_create;
	66	}
	67
	68	static struct netdev_dev_dummy *
	69	netdev_dev_dummy_cast(const struct netdev_dev *netdev_dev)
	70	{
	71	assert(is_dummy_class(netdev_dev_get_class(netdev_dev)));
	72	return CONTAINER_OF(netdev_dev, struct netdev_dev_dummy, netdev_dev);
	73	}
	74
	75	static struct netdev_dummy *
	76	netdev_dummy_cast(const struct netdev *netdev)
	77	{
	78	struct netdev_dev *netdev_dev = netdev_get_dev(netdev);
	79	assert(is_dummy_class(netdev_dev_get_class(netdev_dev)));
	80	return CONTAINER_OF(netdev, struct netdev_dummy, netdev);
	81	}
	82
	83	static int
	84	netdev_dummy_create(const struct netdev_class class, const char name,
614c4892 BP	85	struct netdev_dev **netdev_devp)
	86	{
	87	static unsigned int n = 0xaa550000;
	88	struct netdev_dev_dummy *netdev_dev;
	89
	90	netdev_dev = xzalloc(sizeof *netdev_dev);
de5cdb90	91	netdev_dev_init(&netdev_dev->netdev_dev, name, class);
614c4892 BP	92	netdev_dev->hwaddr[0] = 0xaa;
	93	netdev_dev->hwaddr[1] = 0x55;
	94	netdev_dev->hwaddr[2] = n >> 24;
	95	netdev_dev->hwaddr[3] = n >> 16;
	96	netdev_dev->hwaddr[4] = n >> 8;
	97	netdev_dev->hwaddr[5] = n;
	98	netdev_dev->mtu = 1500;
	99	netdev_dev->flags = 0;
ac4d3bcb	100	netdev_dev->change_seq = 1;
fbac791a BP	101	list_init(&netdev_dev->devs);
	102
	103	shash_add(&dummy_netdev_devs, name, netdev_dev);
614c4892 BP	104
	105	n++;
	106
	107	*netdev_devp = &netdev_dev->netdev_dev;
	108
	109	return 0;
	110	}
	111
	112	static void
	113	netdev_dummy_destroy(struct netdev_dev *netdev_dev_)
	114	{
	115	struct netdev_dev_dummy *netdev_dev = netdev_dev_dummy_cast(netdev_dev_);
	116
fbac791a BP	117	shash_find_and_delete(&dummy_netdev_devs,
fbac791a BP	118	netdev_dev_get_name(netdev_dev_));
614c4892 BP	119	free(netdev_dev);
	120	}
	121
	122	static int
7b6b0ef4	123	netdev_dummy_open(struct netdev_dev netdev_dev_, struct netdev *netdevp)
614c4892	124	{
fbac791a	125	struct netdev_dev_dummy *netdev_dev = netdev_dev_dummy_cast(netdev_dev_);
614c4892 BP	126	struct netdev_dummy *netdev;
	127
	128	netdev = xmalloc(sizeof *netdev);
	129	netdev_init(&netdev->netdev, netdev_dev_);
fbac791a BP	130	list_init(&netdev->recv_queue);
fbac791a BP	131	netdev->listening = false;
614c4892 BP	132
614c4892 BP	133	*netdevp = &netdev->netdev;
fbac791a	134	list_push_back(&netdev_dev->devs, &netdev->node);
614c4892 BP	135	return 0;
	136	}
	137
	138	static void
	139	netdev_dummy_close(struct netdev *netdev_)
	140	{
	141	struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
fbac791a BP	142	list_remove(&netdev->node);
fbac791a BP	143	ofpbuf_list_delete(&netdev->recv_queue);
614c4892 BP	144	free(netdev);
	145	}
	146
7b6b0ef4	147	static int
fbac791a	148	netdev_dummy_listen(struct netdev *netdev_)
7b6b0ef4	149	{
fbac791a BP	150	struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
fbac791a BP	151	netdev->listening = true;
7b6b0ef4 BP	152	return 0;
	153	}
	154
	155	static int
fbac791a BP	156	netdev_dummy_recv(struct netdev netdev_, void buffer, size_t size)
	157	{
	158	struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
	159	struct ofpbuf *packet;
78945f19	160	size_t packet_size;
fbac791a BP	161
	162	if (list_is_empty(&netdev->recv_queue)) {
	163	return -EAGAIN;
	164	}
	165
	166	packet = ofpbuf_from_list(list_pop_front(&netdev->recv_queue));
	167	if (packet->size > size) {
	168	return -EMSGSIZE;
	169	}
78945f19	170	packet_size = packet->size;
fbac791a BP	171
	172	memcpy(buffer, packet->data, packet->size);
	173	ofpbuf_delete(packet);
	174
78945f19	175	return packet_size;
fbac791a BP	176	}
	177
	178	static void
	179	netdev_dummy_recv_wait(struct netdev *netdev_)
7b6b0ef4	180	{
fbac791a BP	181	struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
	182	if (!list_is_empty(&netdev->recv_queue)) {
	183	poll_immediate_wake();
	184	}
	185	}
	186
	187	static int
	188	netdev_dummy_drain(struct netdev *netdev_)
	189	{
	190	struct netdev_dummy *netdev = netdev_dummy_cast(netdev_);
	191	ofpbuf_list_delete(&netdev->recv_queue);
	192	return 0;
7b6b0ef4 BP	193	}
7b6b0ef4 BP	194
614c4892 BP	195	static int
	196	netdev_dummy_set_etheraddr(struct netdev *netdev,
	197	const uint8_t mac[ETH_ADDR_LEN])
	198	{
	199	struct netdev_dev_dummy *dev =
	200	netdev_dev_dummy_cast(netdev_get_dev(netdev));
	201
	202	if (!eth_addr_equals(dev->hwaddr, mac)) {
	203	memcpy(dev->hwaddr, mac, ETH_ADDR_LEN);
	204	netdev_dummy_poll_notify(netdev);
	205	}
	206
	207	return 0;
	208	}
	209
	210	static int
	211	netdev_dummy_get_etheraddr(const struct netdev *netdev,
	212	uint8_t mac[ETH_ADDR_LEN])
	213	{
	214	const struct netdev_dev_dummy *dev =
	215	netdev_dev_dummy_cast(netdev_get_dev(netdev));
	216
	217	memcpy(mac, dev->hwaddr, ETH_ADDR_LEN);
	218	return 0;
	219	}
	220
	221	static int
	222	netdev_dummy_get_mtu(const struct netdev netdev, int mtup)
	223	{
	224	const struct netdev_dev_dummy *dev =
	225	netdev_dev_dummy_cast(netdev_get_dev(netdev));
	226
	227	*mtup = dev->mtu;
	228	return 0;
	229	}
	230
9b020780 PS	231	static int
	232	netdev_dummy_set_mtu(const struct netdev *netdev, int mtu)
	233	{
	234	struct netdev_dev_dummy *dev =
	235	netdev_dev_dummy_cast(netdev_get_dev(netdev));
	236
	237	dev->mtu = mtu;
	238	return 0;
	239	}
	240
614c4892 BP	241	static int
	242	netdev_dummy_get_stats(const struct netdev netdev, struct netdev_stats stats)
	243	{
	244	const struct netdev_dev_dummy *dev =
	245	netdev_dev_dummy_cast(netdev_get_dev(netdev));
	246
	247	*stats = dev->stats;
	248	return 0;
	249	}
	250
	251	static int
	252	netdev_dummy_set_stats(struct netdev netdev, const struct netdev_stats stats)
	253	{
	254	struct netdev_dev_dummy *dev =
	255	netdev_dev_dummy_cast(netdev_get_dev(netdev));
	256
	257	dev->stats = *stats;
	258	return 0;
	259	}
	260
	261	static int
	262	netdev_dummy_update_flags(struct netdev *netdev,
	263	enum netdev_flags off, enum netdev_flags on,
	264	enum netdev_flags *old_flagsp)
	265	{
	266	struct netdev_dev_dummy *dev =
	267	netdev_dev_dummy_cast(netdev_get_dev(netdev));
	268
	269	if ((off \| on) & ~(NETDEV_UP \| NETDEV_PROMISC)) {
	270	return EINVAL;
	271	}
	272
	273	*old_flagsp = dev->flags;
	274	dev->flags \|= on;
	275	dev->flags &= ~off;
	276	if (*old_flagsp != dev->flags) {
	277	netdev_dummy_poll_notify(netdev);
	278	}
	279	return 0;
	280	}
	281
ac4d3bcb EJ	282	static unsigned int
	283	netdev_dummy_change_seq(const struct netdev *netdev)
	284	{
	285	return netdev_dev_dummy_cast(netdev_get_dev(netdev))->change_seq;
	286	}
614c4892 BP	287	\f
	288	/* Helper functions. */
	289
	290	static void
	291	netdev_dummy_poll_notify(const struct netdev *netdev)
	292	{
ac4d3bcb EJ	293	struct netdev_dev_dummy *dev =
ac4d3bcb EJ	294	netdev_dev_dummy_cast(netdev_get_dev(netdev));
614c4892	295
ac4d3bcb EJ	296	dev->change_seq++;
	297	if (!dev->change_seq) {
	298	dev->change_seq++;
	299	}
614c4892 BP	300	}
	301
	302	static const struct netdev_class dummy_class = {
	303	"dummy",
	304	NULL, /* init */
	305	NULL, /* run */
	306	NULL, /* wait */
	307
	308	netdev_dummy_create,
	309	netdev_dummy_destroy,
de5cdb90	310	NULL, /* get_config */
aebf4235	311	NULL, /* set_config */
614c4892 BP	312
	313	netdev_dummy_open,
	314	netdev_dummy_close,
	315
fbac791a BP	316	netdev_dummy_listen,
	317	netdev_dummy_recv,
	318	netdev_dummy_recv_wait,
	319	netdev_dummy_drain,
614c4892 BP	320
	321	NULL, /* send */
	322	NULL, /* send_wait */
	323
	324	netdev_dummy_set_etheraddr,
	325	netdev_dummy_get_etheraddr,
	326	netdev_dummy_get_mtu,
9b020780	327	netdev_dummy_set_mtu,
614c4892 BP	328	NULL, /* get_ifindex */
614c4892 BP	329	NULL, /* get_carrier */
65c3058c	330	NULL, /* get_carrier_resets */
63331829	331	NULL, /* get_miimon */
614c4892 BP	332	netdev_dummy_get_stats,
	333	netdev_dummy_set_stats,
	334
	335	NULL, /* get_features */
	336	NULL, /* set_advertisements */
614c4892 BP	337
	338	NULL, /* set_policing */
	339	NULL, /* get_qos_types */
	340	NULL, /* get_qos_capabilities */
	341	NULL, /* get_qos */
	342	NULL, /* set_qos */
	343	NULL, /* get_queue */
	344	NULL, /* set_queue */
	345	NULL, /* delete_queue */
	346	NULL, /* get_queue_stats */
	347	NULL, /* dump_queues */
	348	NULL, /* dump_queue_stats */
	349
	350	NULL, /* get_in4 */
	351	NULL, /* set_in4 */
	352	NULL, /* get_in6 */
	353	NULL, /* add_router */
	354	NULL, /* get_next_hop */
ea763e0e	355	NULL, /* get_status */
614c4892 BP	356	NULL, /* arp_lookup */
	357
	358	netdev_dummy_update_flags,
	359
ac4d3bcb	360	netdev_dummy_change_seq
614c4892 BP	361	};
614c4892 BP	362
fbac791a BP	363	static struct ofpbuf *
	364	eth_from_packet_or_flow(const char *s)
	365	{
	366	enum odp_key_fitness fitness;
	367	struct ofpbuf *packet;
	368	struct ofpbuf odp_key;
	369	struct flow flow;
	370	int error;
	371
	372	if (!eth_from_hex(s, &packet)) {
	373	return packet;
	374	}
	375
	376	/* Convert string to datapath key.
	377	*
	378	* It would actually be nicer to parse an OpenFlow-like flow key here, but
	379	* the code for that currently calls exit() on parse error. We have to
	380	* settle for parsing a datapath key for now.
	381	*/
	382	ofpbuf_init(&odp_key, 0);
	383	error = odp_flow_key_from_string(s, NULL, &odp_key);
	384	if (error) {
	385	ofpbuf_uninit(&odp_key);
	386	return NULL;
	387	}
	388
	389	/* Convert odp_key to flow. */
	390	fitness = odp_flow_key_to_flow(odp_key.data, odp_key.size, &flow);
	391	if (fitness == ODP_FIT_ERROR) {
	392	ofpbuf_uninit(&odp_key);
	393	return NULL;
	394	}
	395
	396	packet = ofpbuf_new(0);
	397	flow_compose(packet, &flow);
	398
	399	ofpbuf_uninit(&odp_key);
	400	return packet;
	401	}
	402
	403	static void
	404	netdev_dummy_receive(struct unixctl_conn *conn,
	405	int argc, const char argv[], void aux OVS_UNUSED)
	406	{
	407	struct netdev_dev_dummy *dummy_dev;
	408	int n_listeners;
	409	int i;
	410
	411	dummy_dev = shash_find_data(&dummy_netdev_devs, argv[1]);
	412	if (!dummy_dev) {
bde9f75d	413	unixctl_command_reply_error(conn, "no such dummy netdev");
fbac791a BP	414	return;
	415	}
	416
	417	n_listeners = 0;
	418	for (i = 2; i < argc; i++) {
	419	struct netdev_dummy *dev;
	420	struct ofpbuf *packet;
	421
	422	packet = eth_from_packet_or_flow(argv[i]);
	423	if (!packet) {
bde9f75d	424	unixctl_command_reply_error(conn, "bad packet syntax");
fbac791a BP	425	return;
	426	}
	427
	428	n_listeners = 0;
	429	LIST_FOR_EACH (dev, node, &dummy_dev->devs) {
	430	if (dev->listening) {
	431	struct ofpbuf *copy = ofpbuf_clone(packet);
	432	list_push_back(&dev->recv_queue, &copy->list_node);
	433	n_listeners++;
	434	}
	435	}
	436	ofpbuf_delete(packet);
	437	}
	438
	439	if (!n_listeners) {
bde9f75d	440	unixctl_command_reply(conn, "packets queued but nobody listened");
fbac791a	441	} else {
bde9f75d	442	unixctl_command_reply(conn, "success");
fbac791a BP	443	}
	444	}
	445
614c4892	446	void
0cbfe35d	447	netdev_dummy_register(bool override)
614c4892	448	{
fbac791a BP	449	unixctl_command_register("netdev-dummy/receive", "NAME PACKET\|FLOW...",
fbac791a BP	450	2, INT_MAX, netdev_dummy_receive, NULL);
0cbfe35d BP	451
	452	if (override) {
	453	struct sset types;
	454	const char *type;
	455
	456	sset_init(&types);
	457	netdev_enumerate_types(&types);
	458	SSET_FOR_EACH (type, &types) {
	459	if (!netdev_unregister_provider(type)) {
	460	struct netdev_class *class;
	461
	462	class = xmalloc(sizeof *class);
	463	*class = dummy_class;
	464	class->type = xstrdup(type);
	465	netdev_register_provider(class);
	466	}
	467	}
	468	sset_destroy(&types);
	469	}
	470	netdev_register_provider(&dummy_class);
614c4892	471	}