[mirror_qemu.git] / net / stream.c

/*
 * QEMU System Emulator
 *
 * Copyright (c) 2003-2008 Fabrice Bellard
 * Copyright (c) 2022 Red Hat, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "qemu/osdep.h"

#include "net/net.h"
#include "clients.h"
#include "monitor/monitor.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "qemu/option.h"
#include "qemu/sockets.h"
#include "qemu/iov.h"
#include "qemu/main-loop.h"
#include "qemu/cutils.h"
#include "io/channel.h"
#include "io/channel-socket.h"
#include "io/net-listener.h"
#include "qapi/qapi-events-net.h"

typedef struct NetStreamState {
    NetClientState nc;
    QIOChannel *listen_ioc;
    QIONetListener *listener;
    QIOChannel *ioc;
    guint ioc_read_tag;
    guint ioc_write_tag;
    SocketReadState rs;
    unsigned int send_index;      /* number of bytes sent*/
} NetStreamState;

static void net_stream_listen(QIONetListener *listener,
                              QIOChannelSocket *cioc,
                              void *opaque);

static gboolean net_stream_writable(QIOChannel *ioc,
                                    GIOCondition condition,
                                    gpointer data)
{
    NetStreamState *s = data;

    s->ioc_write_tag = 0;

    qemu_flush_queued_packets(&s->nc);

    return G_SOURCE_REMOVE;
}

static ssize_t net_stream_receive(NetClientState *nc, const uint8_t *buf,
                                  size_t size)
{
    NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc);
    uint32_t len = htonl(size);
    struct iovec iov[] = {
        {
            .iov_base = &len,
            .iov_len  = sizeof(len),
        }, {
            .iov_base = (void *)buf,
            .iov_len  = size,
        },
    };
    struct iovec local_iov[2];
    unsigned int nlocal_iov;
    size_t remaining;
    ssize_t ret;

    remaining = iov_size(iov, 2) - s->send_index;
    nlocal_iov = iov_copy(local_iov, 2, iov, 2, s->send_index, remaining);
    ret = qio_channel_writev(s->ioc, local_iov, nlocal_iov, NULL);
    if (ret == QIO_CHANNEL_ERR_BLOCK) {
        ret = 0; /* handled further down */
    }
    if (ret == -1) {
        s->send_index = 0;
        return -errno;
    }
    if (ret < (ssize_t)remaining) {
        s->send_index += ret;
        s->ioc_write_tag = qio_channel_add_watch(s->ioc, G_IO_OUT,
                                                 net_stream_writable, s, NULL);
        return 0;
    }
    s->send_index = 0;
    return size;
}

static gboolean net_stream_send(QIOChannel *ioc,
                                GIOCondition condition,
                                gpointer data);

static void net_stream_send_completed(NetClientState *nc, ssize_t len)
{
    NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc);

    if (!s->ioc_read_tag) {
        s->ioc_read_tag = qio_channel_add_watch(s->ioc, G_IO_IN,
                                                net_stream_send, s, NULL);
    }
}

static void net_stream_rs_finalize(SocketReadState *rs)
{
    NetStreamState *s = container_of(rs, NetStreamState, rs);

    if (qemu_send_packet_async(&s->nc, rs->buf,
                               rs->packet_len,
                               net_stream_send_completed) == 0) {
        if (s->ioc_read_tag) {
            g_source_remove(s->ioc_read_tag);
            s->ioc_read_tag = 0;
        }
    }
}

static gboolean net_stream_send(QIOChannel *ioc,
                                GIOCondition condition,
                                gpointer data)
{
    NetStreamState *s = data;
    int size;
    int ret;
    char buf1[NET_BUFSIZE];
    const char *buf;

    size = qio_channel_read(s->ioc, buf1, sizeof(buf1), NULL);
    if (size < 0) {
        if (errno != EWOULDBLOCK) {
            goto eoc;
        }
    } else if (size == 0) {
        /* end of connection */
    eoc:
        s->ioc_read_tag = 0;
        if (s->ioc_write_tag) {
            g_source_remove(s->ioc_write_tag);
            s->ioc_write_tag = 0;
        }
        if (s->listener) {
            qio_net_listener_set_client_func(s->listener, net_stream_listen,
                                             s, NULL);
        }
        object_unref(OBJECT(s->ioc));
        s->ioc = NULL;

        net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);
        s->nc.link_down = true;
        qemu_set_info_str(&s->nc, "%s", "");

        qapi_event_send_netdev_stream_disconnected(s->nc.name);

        return G_SOURCE_REMOVE;
    }
    buf = buf1;

    ret = net_fill_rstate(&s->rs, (const uint8_t *)buf, size);

    if (ret == -1) {
        goto eoc;
    }

    return G_SOURCE_CONTINUE;
}

static void net_stream_cleanup(NetClientState *nc)
{
    NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc);
    if (s->ioc) {
        if (QIO_CHANNEL_SOCKET(s->ioc)->fd != -1) {
            if (s->ioc_read_tag) {
                g_source_remove(s->ioc_read_tag);
                s->ioc_read_tag = 0;
            }
            if (s->ioc_write_tag) {
                g_source_remove(s->ioc_write_tag);
                s->ioc_write_tag = 0;
            }
        }
        object_unref(OBJECT(s->ioc));
        s->ioc = NULL;
    }
    if (s->listen_ioc) {
        if (s->listener) {
            qio_net_listener_disconnect(s->listener);
            object_unref(OBJECT(s->listener));
            s->listener = NULL;
        }
        object_unref(OBJECT(s->listen_ioc));
        s->listen_ioc = NULL;
    }
}

static NetClientInfo net_stream_info = {
    .type = NET_CLIENT_DRIVER_STREAM,
    .size = sizeof(NetStreamState),
    .receive = net_stream_receive,
    .cleanup = net_stream_cleanup,
};

static void net_stream_listen(QIONetListener *listener,
                              QIOChannelSocket *cioc,
                              void *opaque)
{
    NetStreamState *s = opaque;
    SocketAddress *addr;
    char *uri;

    object_ref(OBJECT(cioc));

    qio_net_listener_set_client_func(s->listener, NULL, s, NULL);

    s->ioc = QIO_CHANNEL(cioc);
    qio_channel_set_name(s->ioc, "stream-server");
    s->nc.link_down = false;

    s->ioc_read_tag = qio_channel_add_watch(s->ioc, G_IO_IN, net_stream_send,
                                            s, NULL);

    if (cioc->localAddr.ss_family == AF_UNIX) {
        addr = qio_channel_socket_get_local_address(cioc, NULL);
    } else {
        addr = qio_channel_socket_get_remote_address(cioc, NULL);
    }
    g_assert(addr != NULL);
    uri = socket_uri(addr);
    qemu_set_info_str(&s->nc, "%s", uri);
    g_free(uri);
    qapi_event_send_netdev_stream_connected(s->nc.name, addr);
    qapi_free_SocketAddress(addr);
}

static void net_stream_server_listening(QIOTask *task, gpointer opaque)
{
    NetStreamState *s = opaque;
    QIOChannelSocket *listen_sioc = QIO_CHANNEL_SOCKET(s->listen_ioc);
    SocketAddress *addr;
    int ret;

    if (listen_sioc->fd < 0) {
        qemu_set_info_str(&s->nc, "connection error");
        return;
    }

    addr = qio_channel_socket_get_local_address(listen_sioc, NULL);
    g_assert(addr != NULL);
    ret = qemu_socket_try_set_nonblock(listen_sioc->fd);
    if (addr->type == SOCKET_ADDRESS_TYPE_FD && ret < 0) {
        qemu_set_info_str(&s->nc, "can't use file descriptor %s (errno %d)",
                          addr->u.fd.str, -ret);
        return;
    }
    g_assert(ret == 0);
    qapi_free_SocketAddress(addr);

    s->nc.link_down = true;
    s->listener = qio_net_listener_new();

    net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);
    qio_net_listener_set_client_func(s->listener, net_stream_listen, s, NULL);
    qio_net_listener_add(s->listener, listen_sioc);
}

static int net_stream_server_init(NetClientState *peer,
                                  const char *model,
                                  const char *name,
                                  SocketAddress *addr,
                                  Error **errp)
{
    NetClientState *nc;
    NetStreamState *s;
    QIOChannelSocket *listen_sioc = qio_channel_socket_new();

    nc = qemu_new_net_client(&net_stream_info, peer, model, name);
    s = DO_UPCAST(NetStreamState, nc, nc);

    s->listen_ioc = QIO_CHANNEL(listen_sioc);
    qio_channel_socket_listen_async(listen_sioc, addr, 0,
                                    net_stream_server_listening, s,
                                    NULL, NULL);

    return 0;
}

static void net_stream_client_connected(QIOTask *task, gpointer opaque)
{
    NetStreamState *s = opaque;
    QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(s->ioc);
    SocketAddress *addr;
    gchar *uri;
    int ret;

    if (sioc->fd < 0) {
        qemu_set_info_str(&s->nc, "connection error");
        goto error;
    }

    addr = qio_channel_socket_get_remote_address(sioc, NULL);
    g_assert(addr != NULL);
    uri = socket_uri(addr);
    qemu_set_info_str(&s->nc, "%s", uri);
    g_free(uri);

    ret = qemu_socket_try_set_nonblock(sioc->fd);
    if (addr->type == SOCKET_ADDRESS_TYPE_FD && ret < 0) {
        qemu_set_info_str(&s->nc, "can't use file descriptor %s (errno %d)",
                          addr->u.fd.str, -ret);
        qapi_free_SocketAddress(addr);
        goto error;
    }
    g_assert(ret == 0);

    net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);

    /* Disable Nagle algorithm on TCP sockets to reduce latency */
    qio_channel_set_delay(s->ioc, false);

    s->ioc_read_tag = qio_channel_add_watch(s->ioc, G_IO_IN, net_stream_send,
                                            s, NULL);
    s->nc.link_down = false;
    qapi_event_send_netdev_stream_connected(s->nc.name, addr);
    qapi_free_SocketAddress(addr);

    return;
error:
    object_unref(OBJECT(s->ioc));
    s->ioc = NULL;
}

static int net_stream_client_init(NetClientState *peer,
                                  const char *model,
                                  const char *name,
                                  SocketAddress *addr,
                                  Error **errp)
{
    NetStreamState *s;
    NetClientState *nc;
    QIOChannelSocket *sioc = qio_channel_socket_new();

    nc = qemu_new_net_client(&net_stream_info, peer, model, name);
    s = DO_UPCAST(NetStreamState, nc, nc);

    s->ioc = QIO_CHANNEL(sioc);
    s->nc.link_down = true;

    qio_channel_socket_connect_async(sioc, addr,
                                     net_stream_client_connected, s,
                                     NULL, NULL);

    return 0;
}

int net_init_stream(const Netdev *netdev, const char *name,
                    NetClientState *peer, Error **errp)
{
    const NetdevStreamOptions *sock;

    assert(netdev->type == NET_CLIENT_DRIVER_STREAM);
    sock = &netdev->u.stream;

    if (!sock->has_server || !sock->server) {
        return net_stream_client_init(peer, "stream", name, sock->addr, errp);
    }
    return net_stream_server_init(peer, "stream", name, sock->addr, errp);
}
Commit	Line	Data
5166fe0a LV	1	/*
	2	* QEMU System Emulator
	3	*
	4	* Copyright (c) 2003-2008 Fabrice Bellard
	5	* Copyright (c) 2022 Red Hat, Inc.
	6	*
	7	* Permission is hereby granted, free of charge, to any person obtaining a copy
	8	* of this software and associated documentation files (the "Software"), to deal
	9	* in the Software without restriction, including without limitation the rights
	10	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	11	* copies of the Software, and to permit persons to whom the Software is
	12	* furnished to do so, subject to the following conditions:
	13	*
	14	* The above copyright notice and this permission notice shall be included in
	15	* all copies or substantial portions of the Software.
	16	*
	17	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	18	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	19	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	20	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	21	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	22	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	23	* THE SOFTWARE.
	24	*/
	25
	26	#include "qemu/osdep.h"
	27
	28	#include "net/net.h"
	29	#include "clients.h"
	30	#include "monitor/monitor.h"
	31	#include "qapi/error.h"
	32	#include "qemu/error-report.h"
	33	#include "qemu/option.h"
	34	#include "qemu/sockets.h"
	35	#include "qemu/iov.h"
	36	#include "qemu/main-loop.h"
	37	#include "qemu/cutils.h"
1f9c890f LV	38	#include "io/channel.h"
	39	#include "io/channel-socket.h"
	40	#include "io/net-listener.h"
e506fee8	41	#include "qapi/qapi-events-net.h"
5166fe0a LV	42
	43	typedef struct NetStreamState {
	44	NetClientState nc;
1f9c890f LV	45	QIOChannel *listen_ioc;
	46	QIONetListener *listener;
	47	QIOChannel *ioc;
	48	guint ioc_read_tag;
	49	guint ioc_write_tag;
5166fe0a LV	50	SocketReadState rs;
5166fe0a LV	51	unsigned int send_index; /* number of bytes sent*/
5166fe0a LV	52	} NetStreamState;
5166fe0a LV	53
1f9c890f LV	54	static void net_stream_listen(QIONetListener *listener,
	55	QIOChannelSocket *cioc,
	56	void *opaque);
5166fe0a	57
1f9c890f LV	58	static gboolean net_stream_writable(QIOChannel *ioc,
	59	GIOCondition condition,
	60	gpointer data)
5166fe0a	61	{
1f9c890f	62	NetStreamState *s = data;
5166fe0a	63
1f9c890f	64	s->ioc_write_tag = 0;
5166fe0a LV	65
5166fe0a LV	66	qemu_flush_queued_packets(&s->nc);
1f9c890f LV	67
1f9c890f LV	68	return G_SOURCE_REMOVE;
5166fe0a LV	69	}
	70
	71	static ssize_t net_stream_receive(NetClientState nc, const uint8_t buf,
	72	size_t size)
	73	{
	74	NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc);
	75	uint32_t len = htonl(size);
	76	struct iovec iov[] = {
	77	{
	78	.iov_base = &len,
	79	.iov_len = sizeof(len),
	80	}, {
	81	.iov_base = (void *)buf,
	82	.iov_len = size,
	83	},
	84	};
1f9c890f LV	85	struct iovec local_iov[2];
1f9c890f LV	86	unsigned int nlocal_iov;
5166fe0a LV	87	size_t remaining;
	88	ssize_t ret;
	89
	90	remaining = iov_size(iov, 2) - s->send_index;
1f9c890f LV	91	nlocal_iov = iov_copy(local_iov, 2, iov, 2, s->send_index, remaining);
	92	ret = qio_channel_writev(s->ioc, local_iov, nlocal_iov, NULL);
	93	if (ret == QIO_CHANNEL_ERR_BLOCK) {
5166fe0a LV	94	ret = 0; /* handled further down */
	95	}
	96	if (ret == -1) {
	97	s->send_index = 0;
	98	return -errno;
	99	}
	100	if (ret < (ssize_t)remaining) {
	101	s->send_index += ret;
1f9c890f LV	102	s->ioc_write_tag = qio_channel_add_watch(s->ioc, G_IO_OUT,
1f9c890f LV	103	net_stream_writable, s, NULL);
5166fe0a LV	104	return 0;
	105	}
	106	s->send_index = 0;
	107	return size;
	108	}
	109
1f9c890f LV	110	static gboolean net_stream_send(QIOChannel *ioc,
	111	GIOCondition condition,
	112	gpointer data);
	113
5166fe0a LV	114	static void net_stream_send_completed(NetClientState *nc, ssize_t len)
	115	{
	116	NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc);
	117
1f9c890f LV	118	if (!s->ioc_read_tag) {
	119	s->ioc_read_tag = qio_channel_add_watch(s->ioc, G_IO_IN,
	120	net_stream_send, s, NULL);
5166fe0a LV	121	}
	122	}
	123
	124	static void net_stream_rs_finalize(SocketReadState *rs)
	125	{
	126	NetStreamState *s = container_of(rs, NetStreamState, rs);
	127
	128	if (qemu_send_packet_async(&s->nc, rs->buf,
	129	rs->packet_len,
	130	net_stream_send_completed) == 0) {
1f9c890f LV	131	if (s->ioc_read_tag) {
	132	g_source_remove(s->ioc_read_tag);
	133	s->ioc_read_tag = 0;
	134	}
5166fe0a LV	135	}
	136	}
	137
1f9c890f LV	138	static gboolean net_stream_send(QIOChannel *ioc,
	139	GIOCondition condition,
	140	gpointer data)
5166fe0a	141	{
1f9c890f	142	NetStreamState *s = data;
5166fe0a LV	143	int size;
5166fe0a LV	144	int ret;
1f9c890f LV	145	char buf1[NET_BUFSIZE];
1f9c890f LV	146	const char *buf;
5166fe0a	147
1f9c890f	148	size = qio_channel_read(s->ioc, buf1, sizeof(buf1), NULL);
5166fe0a LV	149	if (size < 0) {
	150	if (errno != EWOULDBLOCK) {
	151	goto eoc;
	152	}
	153	} else if (size == 0) {
	154	/* end of connection */
	155	eoc:
1f9c890f LV	156	s->ioc_read_tag = 0;
	157	if (s->ioc_write_tag) {
	158	g_source_remove(s->ioc_write_tag);
	159	s->ioc_write_tag = 0;
5166fe0a	160	}
1f9c890f LV	161	if (s->listener) {
	162	qio_net_listener_set_client_func(s->listener, net_stream_listen,
	163	s, NULL);
	164	}
	165	object_unref(OBJECT(s->ioc));
	166	s->ioc = NULL;
5166fe0a	167
5166fe0a LV	168	net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);
5166fe0a LV	169	s->nc.link_down = true;
ac149498	170	qemu_set_info_str(&s->nc, "%s", "");
5166fe0a	171
e506fee8 LV	172	qapi_event_send_netdev_stream_disconnected(s->nc.name);
e506fee8 LV	173
1f9c890f	174	return G_SOURCE_REMOVE;
5166fe0a LV	175	}
	176	buf = buf1;
	177
1f9c890f	178	ret = net_fill_rstate(&s->rs, (const uint8_t *)buf, size);
5166fe0a LV	179
	180	if (ret == -1) {
	181	goto eoc;
	182	}
1f9c890f LV	183
1f9c890f LV	184	return G_SOURCE_CONTINUE;
5166fe0a LV	185	}
	186
	187	static void net_stream_cleanup(NetClientState *nc)
	188	{
	189	NetStreamState *s = DO_UPCAST(NetStreamState, nc, nc);
1f9c890f LV	190	if (s->ioc) {
	191	if (QIO_CHANNEL_SOCKET(s->ioc)->fd != -1) {
	192	if (s->ioc_read_tag) {
	193	g_source_remove(s->ioc_read_tag);
	194	s->ioc_read_tag = 0;
	195	}
	196	if (s->ioc_write_tag) {
	197	g_source_remove(s->ioc_write_tag);
	198	s->ioc_write_tag = 0;
	199	}
	200	}
	201	object_unref(OBJECT(s->ioc));
	202	s->ioc = NULL;
5166fe0a	203	}
1f9c890f LV	204	if (s->listen_ioc) {
	205	if (s->listener) {
	206	qio_net_listener_disconnect(s->listener);
	207	object_unref(OBJECT(s->listener));
	208	s->listener = NULL;
	209	}
	210	object_unref(OBJECT(s->listen_ioc));
	211	s->listen_ioc = NULL;
5166fe0a LV	212	}
	213	}
	214
5166fe0a LV	215	static NetClientInfo net_stream_info = {
	216	.type = NET_CLIENT_DRIVER_STREAM,
	217	.size = sizeof(NetStreamState),
	218	.receive = net_stream_receive,
	219	.cleanup = net_stream_cleanup,
	220	};
	221
1f9c890f LV	222	static void net_stream_listen(QIONetListener *listener,
	223	QIOChannelSocket *cioc,
	224	void *opaque)
5166fe0a	225	{
1f9c890f LV	226	NetStreamState *s = opaque;
	227	SocketAddress *addr;
	228	char *uri;
5166fe0a	229
1f9c890f	230	object_ref(OBJECT(cioc));
5166fe0a	231
1f9c890f	232	qio_net_listener_set_client_func(s->listener, NULL, s, NULL);
5166fe0a	233
1f9c890f LV	234	s->ioc = QIO_CHANNEL(cioc);
	235	qio_channel_set_name(s->ioc, "stream-server");
	236	s->nc.link_down = false;
5166fe0a	237
1f9c890f LV	238	s->ioc_read_tag = qio_channel_add_watch(s->ioc, G_IO_IN, net_stream_send,
1f9c890f LV	239	s, NULL);
5166fe0a	240
1f9c890f LV	241	if (cioc->localAddr.ss_family == AF_UNIX) {
1f9c890f LV	242	addr = qio_channel_socket_get_local_address(cioc, NULL);
5166fe0a	243	} else {
1f9c890f	244	addr = qio_channel_socket_get_remote_address(cioc, NULL);
5166fe0a	245	}
1f9c890f LV	246	g_assert(addr != NULL);
1f9c890f LV	247	uri = socket_uri(addr);
ac149498	248	qemu_set_info_str(&s->nc, "%s", uri);
1f9c890f	249	g_free(uri);
e506fee8	250	qapi_event_send_netdev_stream_connected(s->nc.name, addr);
1f9c890f	251	qapi_free_SocketAddress(addr);
5166fe0a LV	252	}
5166fe0a LV	253
1f9c890f	254	static void net_stream_server_listening(QIOTask *task, gpointer opaque)
5166fe0a LV	255	{
5166fe0a LV	256	NetStreamState *s = opaque;
1f9c890f LV	257	QIOChannelSocket *listen_sioc = QIO_CHANNEL_SOCKET(s->listen_ioc);
	258	SocketAddress *addr;
	259	int ret;
5166fe0a	260
1f9c890f LV	261	if (listen_sioc->fd < 0) {
	262	qemu_set_info_str(&s->nc, "connection error");
	263	return;
13c6be96	264	}
13c6be96	265
1f9c890f LV	266	addr = qio_channel_socket_get_local_address(listen_sioc, NULL);
	267	g_assert(addr != NULL);
	268	ret = qemu_socket_try_set_nonblock(listen_sioc->fd);
	269	if (addr->type == SOCKET_ADDRESS_TYPE_FD && ret < 0) {
	270	qemu_set_info_str(&s->nc, "can't use file descriptor %s (errno %d)",
	271	addr->u.fd.str, -ret);
	272	return;
13c6be96	273	}
1f9c890f LV	274	g_assert(ret == 0);
	275	qapi_free_SocketAddress(addr);
	276
	277	s->nc.link_down = true;
	278	s->listener = qio_net_listener_new();
	279
	280	net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);
	281	qio_net_listener_set_client_func(s->listener, net_stream_listen, s, NULL);
	282	qio_net_listener_add(s->listener, listen_sioc);
5166fe0a LV	283	}
	284
	285	static int net_stream_server_init(NetClientState *peer,
	286	const char *model,
	287	const char *name,
	288	SocketAddress *addr,
	289	Error **errp)
	290	{
	291	NetClientState *nc;
	292	NetStreamState *s;
1f9c890f	293	QIOChannelSocket *listen_sioc = qio_channel_socket_new();
5166fe0a	294
1f9c890f LV	295	nc = qemu_new_net_client(&net_stream_info, peer, model, name);
1f9c890f LV	296	s = DO_UPCAST(NetStreamState, nc, nc);
5166fe0a	297
1f9c890f LV	298	s->listen_ioc = QIO_CHANNEL(listen_sioc);
	299	qio_channel_socket_listen_async(listen_sioc, addr, 0,
	300	net_stream_server_listening, s,
	301	NULL, NULL);
5166fe0a	302
1f9c890f LV	303	return 0;
1f9c890f LV	304	}
13c6be96	305
1f9c890f LV	306	static void net_stream_client_connected(QIOTask *task, gpointer opaque)
	307	{
	308	NetStreamState *s = opaque;
	309	QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(s->ioc);
	310	SocketAddress *addr;
	311	gchar *uri;
	312	int ret;
13c6be96	313
1f9c890f LV	314	if (sioc->fd < 0) {
	315	qemu_set_info_str(&s->nc, "connection error");
	316	goto error;
5166fe0a LV	317	}
5166fe0a LV	318
1f9c890f LV	319	addr = qio_channel_socket_get_remote_address(sioc, NULL);
	320	g_assert(addr != NULL);
	321	uri = socket_uri(addr);
ac149498	322	qemu_set_info_str(&s->nc, "%s", uri);
1f9c890f LV	323	g_free(uri);
	324
	325	ret = qemu_socket_try_set_nonblock(sioc->fd);
	326	if (addr->type == SOCKET_ADDRESS_TYPE_FD && ret < 0) {
	327	qemu_set_info_str(&s->nc, "can't use file descriptor %s (errno %d)",
	328	addr->u.fd.str, -ret);
	329	qapi_free_SocketAddress(addr);
	330	goto error;
5166fe0a	331	}
1f9c890f	332	g_assert(ret == 0);
5166fe0a	333
5166fe0a LV	334	net_socket_rs_init(&s->rs, net_stream_rs_finalize, false);
5166fe0a LV	335
1f9c890f LV	336	/* Disable Nagle algorithm on TCP sockets to reduce latency */
	337	qio_channel_set_delay(s->ioc, false);
	338
	339	s->ioc_read_tag = qio_channel_add_watch(s->ioc, G_IO_IN, net_stream_send,
	340	s, NULL);
	341	s->nc.link_down = false;
e506fee8	342	qapi_event_send_netdev_stream_connected(s->nc.name, addr);
1f9c890f LV	343	qapi_free_SocketAddress(addr);
	344
	345	return;
	346	error:
	347	object_unref(OBJECT(s->ioc));
	348	s->ioc = NULL;
5166fe0a LV	349	}
	350
	351	static int net_stream_client_init(NetClientState *peer,
	352	const char *model,
	353	const char *name,
	354	SocketAddress *addr,
	355	Error **errp)
	356	{
	357	NetStreamState *s;
1f9c890f LV	358	NetClientState *nc;
1f9c890f LV	359	QIOChannelSocket *sioc = qio_channel_socket_new();
5166fe0a	360
1f9c890f LV	361	nc = qemu_new_net_client(&net_stream_info, peer, model, name);
1f9c890f LV	362	s = DO_UPCAST(NetStreamState, nc, nc);
13c6be96	363
1f9c890f LV	364	s->ioc = QIO_CHANNEL(sioc);
	365	s->nc.link_down = true;
	366
	367	qio_channel_socket_connect_async(sioc, addr,
	368	net_stream_client_connected, s,
	369	NULL, NULL);
5166fe0a	370
5166fe0a LV	371	return 0;
	372	}
	373
	374	int net_init_stream(const Netdev netdev, const char name,
	375	NetClientState peer, Error *errp)
	376	{
	377	const NetdevStreamOptions *sock;
	378
	379	assert(netdev->type == NET_CLIENT_DRIVER_STREAM);
	380	sock = &netdev->u.stream;
	381
	382	if (!sock->has_server \|\| !sock->server) {
	383	return net_stream_client_init(peer, "stream", name, sock->addr, errp);
	384	}
	385	return net_stream_server_init(peer, "stream", name, sock->addr, errp);
	386	}