Archipelago » qemu

/*

 *  inet and unix socket functions for qemu

 *

 *  (c) 2008 Gerd Hoffmann <kraxel@redhat.com>

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; under version 2 of the License.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 * Contributions after 2012-01-13 are licensed under the terms of the

 * GNU GPL, version 2 or (at your option) any later version.

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <ctype.h>

#include <errno.h>

#include <unistd.h>

#include "monitor/monitor.h"

#include "qemu/sockets.h"

#include "qemu-common.h" /* for qemu_isdigit */

#include "qemu/main-loop.h"

#ifndef AI_ADDRCONFIG

# define AI_ADDRCONFIG 0

#endif

static const int on=1, off=0;

/* used temporarily until all users are converted to QemuOpts */

QemuOptsList socket_optslist = {

    .name = "socket",

    .head = QTAILQ_HEAD_INITIALIZER(socket_optslist.head),

    .desc = {

        {

            .name = "path",

            .type = QEMU_OPT_STRING,

        },{

            .name = "host",

            .type = QEMU_OPT_STRING,

        },{

            .name = "port",

            .type = QEMU_OPT_STRING,

        },{

            .name = "to",

            .type = QEMU_OPT_NUMBER,

        },{

            .name = "ipv4",

            .type = QEMU_OPT_BOOL,

        },{

            .name = "ipv6",

            .type = QEMU_OPT_BOOL,

        },

        { /* end if list */ }

    },

};

static int inet_getport(struct addrinfo *e)

{

    struct sockaddr_in *i4;

    struct sockaddr_in6 *i6;

    switch (e->ai_family) {

    case PF_INET6:

        i6 = (void*)e->ai_addr;

        return ntohs(i6->sin6_port);

    case PF_INET:

        i4 = (void*)e->ai_addr;

        return ntohs(i4->sin_port);

    default:

        return 0;

    }

}

static void inet_setport(struct addrinfo *e, int port)

{

    struct sockaddr_in *i4;

    struct sockaddr_in6 *i6;

    switch (e->ai_family) {

    case PF_INET6:

        i6 = (void*)e->ai_addr;

        i6->sin6_port = htons(port);

        break;

    case PF_INET:

        i4 = (void*)e->ai_addr;

        i4->sin_port = htons(port);

        break;

    }

}

const char *inet_strfamily(int family)

{

    switch (family) {

    case PF_INET6: return "ipv6";

    case PF_INET:  return "ipv4";

    case PF_UNIX:  return "unix";

    }

    return "unknown";

}

int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp)

{

    struct addrinfo ai,*res,*e;

    const char *addr;

    char port[33];

    char uaddr[INET6_ADDRSTRLEN+1];

    char uport[33];

    int slisten, rc, to, port_min, port_max, p;

    memset(&ai,0, sizeof(ai));

    ai.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;

    ai.ai_family = PF_UNSPEC;

    ai.ai_socktype = SOCK_STREAM;

    if ((qemu_opt_get(opts, "host") == NULL) ||

        (qemu_opt_get(opts, "port") == NULL)) {

        error_setg(errp, "host and/or port not specified");

        return -1;

    }

    pstrcpy(port, sizeof(port), qemu_opt_get(opts, "port"));

    addr = qemu_opt_get(opts, "host");

    to = qemu_opt_get_number(opts, "to", 0);

    if (qemu_opt_get_bool(opts, "ipv4", 0))

        ai.ai_family = PF_INET;

    if (qemu_opt_get_bool(opts, "ipv6", 0))

        ai.ai_family = PF_INET6;

    /* lookup */

    if (port_offset)

        snprintf(port, sizeof(port), "%d", atoi(port) + port_offset);

    rc = getaddrinfo(strlen(addr) ? addr : NULL, port, &ai, &res);

    if (rc != 0) {

        error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,

                   gai_strerror(rc));

        return -1;

    }

    /* create socket + bind */

    for (e = res; e != NULL; e = e->ai_next) {

        getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,

                        uaddr,INET6_ADDRSTRLEN,uport,32,

                        NI_NUMERICHOST | NI_NUMERICSERV);

        slisten = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);

        if (slisten < 0) {

            if (!e->ai_next) {

                error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED);

            }

            continue;

        }

        qemu_setsockopt(slisten, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));

#ifdef IPV6_V6ONLY

        if (e->ai_family == PF_INET6) {

            /* listen on both ipv4 and ipv6 */

            qemu_setsockopt(slisten, IPPROTO_IPV6, IPV6_V6ONLY, &off,

                            sizeof(off));

        }

#endif

        port_min = inet_getport(e);

        port_max = to ? to + port_offset : port_min;

        for (p = port_min; p <= port_max; p++) {

            inet_setport(e, p);

            if (bind(slisten, e->ai_addr, e->ai_addrlen) == 0) {

                goto listen;

            }

            if (p == port_max) {

                if (!e->ai_next) {

                    error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED);

                }

            }

        }

        closesocket(slisten);

    }

    freeaddrinfo(res);

    return -1;

listen:

    if (listen(slisten,1) != 0) {

        error_set_errno(errp, errno, QERR_SOCKET_LISTEN_FAILED);

        closesocket(slisten);

        freeaddrinfo(res);

        return -1;

    }

    snprintf(uport, sizeof(uport), "%d", inet_getport(e) - port_offset);

    qemu_opt_set(opts, "host", uaddr);

    qemu_opt_set(opts, "port", uport);

    qemu_opt_set(opts, "ipv6", (e->ai_family == PF_INET6) ? "on" : "off");

    qemu_opt_set(opts, "ipv4", (e->ai_family != PF_INET6) ? "on" : "off");

    freeaddrinfo(res);

    return slisten;

}

#ifdef _WIN32

#define QEMU_SOCKET_RC_INPROGRESS(rc) \

    ((rc) == -EINPROGRESS || (rc) == -EWOULDBLOCK || (rc) == -WSAEALREADY)

#else

#define QEMU_SOCKET_RC_INPROGRESS(rc) \

    ((rc) == -EINPROGRESS)

#endif

/* Struct to store connect state for non blocking connect */

typedef struct ConnectState {

    int fd;

    struct addrinfo *addr_list;

    struct addrinfo *current_addr;

    NonBlockingConnectHandler *callback;

    void *opaque;

} ConnectState;

static int inet_connect_addr(struct addrinfo *addr, bool *in_progress,

                             ConnectState *connect_state, Error **errp);

static void wait_for_connect(void *opaque)

{

    ConnectState *s = opaque;

    int val = 0, rc = 0;

    socklen_t valsize = sizeof(val);

    bool in_progress;

    qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);

    do {

        rc = qemu_getsockopt(s->fd, SOL_SOCKET, SO_ERROR, &val, &valsize);

    } while (rc == -1 && socket_error() == EINTR);

    /* update rc to contain error */

    if (!rc && val) {

        rc = -1;

    }

    /* connect error */

    if (rc < 0) {

        closesocket(s->fd);

        s->fd = rc;

    }

    /* try to connect to the next address on the list */

    if (s->current_addr) {

        while (s->current_addr->ai_next != NULL && s->fd < 0) {

            s->current_addr = s->current_addr->ai_next;

            s->fd = inet_connect_addr(s->current_addr, &in_progress, s, NULL);

            /* connect in progress */

            if (in_progress) {

                return;

            }

        }

        freeaddrinfo(s->addr_list);

    }

    if (s->callback) {

        s->callback(s->fd, s->opaque);

    }

    g_free(s);

}

static int inet_connect_addr(struct addrinfo *addr, bool *in_progress,

                             ConnectState *connect_state, Error **errp)

{

    int sock, rc;

    *in_progress = false;

    sock = qemu_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);

    if (sock < 0) {

        error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED);

        return -1;

    }

    qemu_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));

    if (connect_state != NULL) {

        qemu_set_nonblock(sock);

    }

    /* connect to peer */

    do {

        rc = 0;

        if (connect(sock, addr->ai_addr, addr->ai_addrlen) < 0) {

            rc = -socket_error();

        }

    } while (rc == -EINTR);

    if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) {

        connect_state->fd = sock;

        qemu_set_fd_handler2(sock, NULL, NULL, wait_for_connect,

                             connect_state);

        *in_progress = true;

    } else if (rc < 0) {

        error_set_errno(errp, errno, QERR_SOCKET_CONNECT_FAILED);

        closesocket(sock);

        return -1;

    }

    return sock;

}

static struct addrinfo *inet_parse_connect_opts(QemuOpts *opts, Error **errp)

{

    struct addrinfo ai, *res;

    int rc;

    const char *addr;

    const char *port;

    memset(&ai, 0, sizeof(ai));

    ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;

    ai.ai_family = PF_UNSPEC;

    ai.ai_socktype = SOCK_STREAM;

    addr = qemu_opt_get(opts, "host");

    port = qemu_opt_get(opts, "port");

    if (addr == NULL || port == NULL) {

        error_setg(errp, "host and/or port not specified");

        return NULL;

    }

    if (qemu_opt_get_bool(opts, "ipv4", 0)) {

        ai.ai_family = PF_INET;

    }

    if (qemu_opt_get_bool(opts, "ipv6", 0)) {

        ai.ai_family = PF_INET6;

    }

    /* lookup */

    rc = getaddrinfo(addr, port, &ai, &res);

    if (rc != 0) {

        error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,

                   gai_strerror(rc));

        return NULL;

    }

    return res;

}

/**

 * Create a socket and connect it to an address.

 *

 * @opts: QEMU options, recognized parameters strings "host" and "port",

 *        bools "ipv4" and "ipv6".

 * @errp: set on error

 * @callback: callback function for non-blocking connect

 * @opaque: opaque for callback function

 *

 * Returns: -1 on error, file descriptor on success.

 *

 * If @callback is non-null, the connect is non-blocking.  If this

 * function succeeds, callback will be called when the connection

 * completes, with the file descriptor on success, or -1 on error.

 */

int inet_connect_opts(QemuOpts *opts, Error **errp,

                      NonBlockingConnectHandler *callback, void *opaque)

{

    struct addrinfo *res, *e;

    int sock = -1;

    bool in_progress;

    ConnectState *connect_state = NULL;

    res = inet_parse_connect_opts(opts, errp);

    if (!res) {

        return -1;

    }

    if (callback != NULL) {

        connect_state = g_malloc0(sizeof(*connect_state));

        connect_state->addr_list = res;

        connect_state->callback = callback;

        connect_state->opaque = opaque;

    }

    for (e = res; e != NULL; e = e->ai_next) {

        if (error_is_set(errp)) {

            error_free(*errp);

            *errp = NULL;

        }

        if (connect_state != NULL) {

            connect_state->current_addr = e;

        }

        sock = inet_connect_addr(e, &in_progress, connect_state, errp);

        if (in_progress) {

            return sock;

        } else if (sock >= 0) {

            /* non blocking socket immediate success, call callback */

            if (callback != NULL) {

                callback(sock, opaque);

            }

            break;

        }

    }

    g_free(connect_state);

    freeaddrinfo(res);

    return sock;

}

int inet_dgram_opts(QemuOpts *opts, Error **errp)

{

    struct addrinfo ai, *peer = NULL, *local = NULL;

    const char *addr;

    const char *port;

    int sock = -1, rc;

    /* lookup peer addr */

    memset(&ai,0, sizeof(ai));

    ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;

    ai.ai_family = PF_UNSPEC;

    ai.ai_socktype = SOCK_DGRAM;

    addr = qemu_opt_get(opts, "host");

    port = qemu_opt_get(opts, "port");

    if (addr == NULL || strlen(addr) == 0) {

        addr = "localhost";

    }

    if (port == NULL || strlen(port) == 0) {

        error_setg(errp, "remote port not specified");

        return -1;

    }

    if (qemu_opt_get_bool(opts, "ipv4", 0))

        ai.ai_family = PF_INET;

    if (qemu_opt_get_bool(opts, "ipv6", 0))

        ai.ai_family = PF_INET6;

    if (0 != (rc = getaddrinfo(addr, port, &ai, &peer))) {

        error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,

                   gai_strerror(rc));

        return -1;

    }

    /* lookup local addr */

    memset(&ai,0, sizeof(ai));

    ai.ai_flags = AI_PASSIVE;

    ai.ai_family = peer->ai_family;

    ai.ai_socktype = SOCK_DGRAM;

    addr = qemu_opt_get(opts, "localaddr");

    port = qemu_opt_get(opts, "localport");

    if (addr == NULL || strlen(addr) == 0) {

        addr = NULL;

    }

    if (!port || strlen(port) == 0)

        port = "0";

    if (0 != (rc = getaddrinfo(addr, port, &ai, &local))) {

        error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,

                   gai_strerror(rc));

        goto err;

    }

    /* create socket */

    sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol);

    if (sock < 0) {

        error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED);

        goto err;

    }

    qemu_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));

    /* bind socket */

    if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) {

        error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED);

        goto err;

    }

    /* connect to peer */

    if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) {

        error_set_errno(errp, errno, QERR_SOCKET_CONNECT_FAILED);

        goto err;

    }

    freeaddrinfo(local);

    freeaddrinfo(peer);

    return sock;

err:

    if (-1 != sock)

        closesocket(sock);

    if (local)

        freeaddrinfo(local);

    if (peer)

        freeaddrinfo(peer);

    return -1;

}

/* compatibility wrapper */

InetSocketAddress *inet_parse(const char *str, Error **errp)

{

    InetSocketAddress *addr;

    const char *optstr, *h;

    char host[64];

    char port[33];

    int to;

    int pos;

    addr = g_new0(InetSocketAddress, 1);

    /* parse address */

    if (str[0] == ':') {

        /* no host given */

        host[0] = '\0';

        if (1 != sscanf(str, ":%32[^,]%n", port, &pos)) {

            error_setg(errp, "error parsing port in address '%s'", str);

            goto fail;

        }

    } else if (str[0] == '[') {

        /* IPv6 addr */

        if (2 != sscanf(str, "[%64[^]]]:%32[^,]%n", host, port, &pos)) {

            error_setg(errp, "error parsing IPv6 address '%s'", str);

            goto fail;

        }

        addr->ipv6 = addr->has_ipv6 = true;

    } else if (qemu_isdigit(str[0])) {

        /* IPv4 addr */

        if (2 != sscanf(str, "%64[0-9.]:%32[^,]%n", host, port, &pos)) {

            error_setg(errp, "error parsing IPv4 address '%s'", str);

            goto fail;

        }

        addr->ipv4 = addr->has_ipv4 = true;

    } else {

        /* hostname */

        if (2 != sscanf(str, "%64[^:]:%32[^,]%n", host, port, &pos)) {

            error_setg(errp, "error parsing address '%s'", str);

            goto fail;

        }

    }

    addr->host = g_strdup(host);

    addr->port = g_strdup(port);

    /* parse options */

    optstr = str + pos;

    h = strstr(optstr, ",to=");

    if (h) {

        h += 4;

        if (sscanf(h, "%d%n", &to, &pos) != 1 ||

            (h[pos] != '\0' && h[pos] != ',')) {

            error_setg(errp, "error parsing to= argument");

            goto fail;

        }

        addr->has_to = true;

        addr->to = to;

    }

    if (strstr(optstr, ",ipv4")) {

        addr->ipv4 = addr->has_ipv4 = true;

    }

    if (strstr(optstr, ",ipv6")) {

        addr->ipv6 = addr->has_ipv6 = true;

    }

    return addr;

fail:

    qapi_free_InetSocketAddress(addr);

    return NULL;

}

static void inet_addr_to_opts(QemuOpts *opts, const InetSocketAddress *addr)

{

    bool ipv4 = addr->ipv4 || !addr->has_ipv4;

    bool ipv6 = addr->ipv6 || !addr->has_ipv6;

    if (!ipv4 || !ipv6) {

        qemu_opt_set_bool(opts, "ipv4", ipv4);

        qemu_opt_set_bool(opts, "ipv6", ipv6);

    }

    if (addr->has_to) {

        char to[20];

        snprintf(to, sizeof(to), "%d", addr->to);

        qemu_opt_set(opts, "to", to);

    }

    qemu_opt_set(opts, "host", addr->host);

    qemu_opt_set(opts, "port", addr->port);

}

int inet_listen(const char *str, char *ostr, int olen,

                int socktype, int port_offset, Error **errp)

{

    QemuOpts *opts;

    char *optstr;

    int sock = -1;

    InetSocketAddress *addr;

    addr = inet_parse(str, errp);

    if (addr != NULL) {

        opts = qemu_opts_create_nofail(&socket_optslist);

        inet_addr_to_opts(opts, addr);

        qapi_free_InetSocketAddress(addr);

        sock = inet_listen_opts(opts, port_offset, errp);

        if (sock != -1 && ostr) {

            optstr = strchr(str, ',');

            if (qemu_opt_get_bool(opts, "ipv6", 0)) {

                snprintf(ostr, olen, "[%s]:%s%s",

                         qemu_opt_get(opts, "host"),

                         qemu_opt_get(opts, "port"),

                         optstr ? optstr : "");

            } else {

                snprintf(ostr, olen, "%s:%s%s",

                         qemu_opt_get(opts, "host"),

                         qemu_opt_get(opts, "port"),

                         optstr ? optstr : "");

            }

        }

        qemu_opts_del(opts);

    }

    return sock;

}

/**

 * Create a blocking socket and connect it to an address.

 *

 * @str: address string

 * @errp: set in case of an error

 *

 * Returns -1 in case of error, file descriptor on success

 **/

int inet_connect(const char *str, Error **errp)

{

    QemuOpts *opts;

    int sock = -1;

    InetSocketAddress *addr;

    addr = inet_parse(str, errp);

    if (addr != NULL) {

        opts = qemu_opts_create_nofail(&socket_optslist);

        inet_addr_to_opts(opts, addr);

        qapi_free_InetSocketAddress(addr);

        sock = inet_connect_opts(opts, errp, NULL, NULL);

        qemu_opts_del(opts);

    }

    return sock;

}

/**

 * Create a non-blocking socket and connect it to an address.

 * Calls the callback function with fd in case of success or -1 in case of

 * error.

 *

 * @str: address string

 * @callback: callback function that is called when connect completes,

 *            cannot be NULL.

 * @opaque: opaque for callback function

 * @errp: set in case of an error

 *

 * Returns: -1 on immediate error, file descriptor on success.

 **/

int inet_nonblocking_connect(const char *str,

                             NonBlockingConnectHandler *callback,

                             void *opaque, Error **errp)

{

    QemuOpts *opts;

    int sock = -1;

    InetSocketAddress *addr;

    g_assert(callback != NULL);

    addr = inet_parse(str, errp);

    if (addr != NULL) {

        opts = qemu_opts_create_nofail(&socket_optslist);

        inet_addr_to_opts(opts, addr);

        qapi_free_InetSocketAddress(addr);

        sock = inet_connect_opts(opts, errp, callback, opaque);

        qemu_opts_del(opts);

    }

    return sock;

}

#ifndef _WIN32

int unix_listen_opts(QemuOpts *opts, Error **errp)

{

    struct sockaddr_un un;

    const char *path = qemu_opt_get(opts, "path");

    int sock, fd;

    sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);

    if (sock < 0) {

        error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED);

        return -1;

    }

    memset(&un, 0, sizeof(un));

    un.sun_family = AF_UNIX;

    if (path && strlen(path)) {

        snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);

    } else {

        char *tmpdir = getenv("TMPDIR");

        snprintf(un.sun_path, sizeof(un.sun_path), "%s/qemu-socket-XXXXXX",

                 tmpdir ? tmpdir : "/tmp");

        /*

         * This dummy fd usage silences the mktemp() unsecure warning.

         * Using mkstemp() doesn't make things more secure here

         * though.  bind() complains about existing files, so we have

         * to unlink first and thus re-open the race window.  The

         * worst case possible is bind() failing, i.e. a DoS attack.

         */

        fd = mkstemp(un.sun_path); close(fd);

        qemu_opt_set(opts, "path", un.sun_path);

    }

    unlink(un.sun_path);

    if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {

        error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED);

        goto err;

    }

    if (listen(sock, 1) < 0) {

        error_set_errno(errp, errno, QERR_SOCKET_LISTEN_FAILED);

        goto err;

    }

    return sock;

err:

    closesocket(sock);

    return -1;

}

int unix_connect_opts(QemuOpts *opts, Error **errp,

                      NonBlockingConnectHandler *callback, void *opaque)

{

    struct sockaddr_un un;

    const char *path = qemu_opt_get(opts, "path");

    ConnectState *connect_state = NULL;

    int sock, rc;

    if (NULL == path) {

        error_setg(errp, "unix connect: no path specified");

        return -1;

    }

    sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);

    if (sock < 0) {

        error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED);

        return -1;

    }

    if (callback != NULL) {

        connect_state = g_malloc0(sizeof(*connect_state));

        connect_state->callback = callback;

        connect_state->opaque = opaque;

        qemu_set_nonblock(sock);

    }

    memset(&un, 0, sizeof(un));

    un.sun_family = AF_UNIX;

    snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);

    /* connect to peer */

    do {

        rc = 0;

        if (connect(sock, (struct sockaddr *) &un, sizeof(un)) < 0) {

            rc = -socket_error();

        }

    } while (rc == -EINTR);

    if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) {

        connect_state->fd = sock;

        qemu_set_fd_handler2(sock, NULL, NULL, wait_for_connect,

                             connect_state);

        return sock;

    } else if (rc >= 0) {

        /* non blocking socket immediate success, call callback */

        if (callback != NULL) {

            callback(sock, opaque);

        }

    }

    if (rc < 0) {

        error_set_errno(errp, -rc, QERR_SOCKET_CONNECT_FAILED);

        close(sock);

        sock = -1;

    }

    g_free(connect_state);

    return sock;

}

#else

int unix_listen_opts(QemuOpts *opts, Error **errp)

{

    error_setg(errp, "unix sockets are not available on windows");

    errno = ENOTSUP;

    return -1;

}

int unix_connect_opts(QemuOpts *opts, Error **errp,

                      NonBlockingConnectHandler *callback, void *opaque)

{

    error_setg(errp, "unix sockets are not available on windows");

    errno = ENOTSUP;

    return -1;

}

#endif

/* compatibility wrapper */

int unix_listen(const char *str, char *ostr, int olen, Error **errp)

{

    QemuOpts *opts;

    char *path, *optstr;

    int sock, len;

    opts = qemu_opts_create_nofail(&socket_optslist);

    optstr = strchr(str, ',');

    if (optstr) {

        len = optstr - str;

        if (len) {

            path = g_malloc(len+1);

            snprintf(path, len+1, "%.*s", len, str);

            qemu_opt_set(opts, "path", path);

            g_free(path);

        }

    } else {

        qemu_opt_set(opts, "path", str);

    }

    sock = unix_listen_opts(opts, errp);

    if (sock != -1 && ostr)

        snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : "");

    qemu_opts_del(opts);

    return sock;

}

int unix_connect(const char *path, Error **errp)

{

    QemuOpts *opts;

    int sock;

    opts = qemu_opts_create_nofail(&socket_optslist);

    qemu_opt_set(opts, "path", path);

    sock = unix_connect_opts(opts, errp, NULL, NULL);

    qemu_opts_del(opts);

    return sock;

}

int unix_nonblocking_connect(const char *path,

                             NonBlockingConnectHandler *callback,

                             void *opaque, Error **errp)

{

    QemuOpts *opts;

    int sock = -1;

    g_assert(callback != NULL);

    opts = qemu_opts_create_nofail(&socket_optslist);

    qemu_opt_set(opts, "path", path);

    sock = unix_connect_opts(opts, errp, callback, opaque);

    qemu_opts_del(opts);

    return sock;

}

SocketAddress *socket_parse(const char *str, Error **errp)

{

    SocketAddress *addr = NULL;

    addr = g_new(SocketAddress, 1);

    if (strstart(str, "unix:", NULL)) {

        if (str[5] == '\0') {

            error_setg(errp, "invalid Unix socket address");

            goto fail;

        } else {

            addr->kind = SOCKET_ADDRESS_KIND_UNIX;

            addr->q_unix = g_new(UnixSocketAddress, 1);