C++ qemu_socket函数代码示例

static int vsock_listen_saddr(VsockSocketAddress *vaddr,
                              Error **errp)
{
    struct sockaddr_vm svm;
    int slisten;

    if (!vsock_parse_vaddr_to_sockaddr(vaddr, &svm, errp)) {
        return -1;
    }

    slisten = qemu_socket(AF_VSOCK, SOCK_STREAM, 0);
    if (slisten < 0) {
        error_setg_errno(errp, errno, "Failed to create socket");
        return -1;
    }

    if (bind(slisten, (const struct sockaddr *)&svm, sizeof(svm)) != 0) {
        error_setg_errno(errp, errno, "Failed to bind socket");
        closesocket(slisten);
        return -1;
    }

    if (listen(slisten, 1) != 0) {
        error_setg_errno(errp, errno, "Failed to listen on socket");
        closesocket(slisten);
        return -1;
    }
    return slisten;
}

int unix_connect_opts(QemuOpts *opts)
{
    struct sockaddr_un un;
    const char *path = qemu_opt_get(opts, "path");
    int sock;

    if (NULL == path) {
        fprintf(stderr, "unix connect: no path specified\n");
        return -1;
    }

    sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
    if (sock < 0) {
        perror("socket(unix)");
        return -1;
    }

    memset(&un, 0, sizeof(un));
    un.sun_family = AF_UNIX;
    snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
    if (connect(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
        fprintf(stderr, "connect(unix:%s): %s\n", path, strerror(errno));
	return -1;
    }

    if (sockets_debug)
        fprintf(stderr, "connect(unix:%s): OK\n", path);
    return sock;
}

static int inet_connect_addr(struct addrinfo *addr, Error **errp)
{
    int sock, rc;

    sock = qemu_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
    if (sock < 0) {
        error_setg_errno(errp, errno, "Failed to create socket");
        return -1;
    }
    socket_set_fast_reuse(sock);

    /* connect to peer */
    do {
        rc = 0;
        if (connect(sock, addr->ai_addr, addr->ai_addrlen) < 0) {
            rc = -errno;
        }
    } while (rc == -EINTR);

    if (rc < 0) {
        error_setg_errno(errp, errno, "Failed to connect socket");
        closesocket(sock);
        return -1;
    }

    return sock;
}

static int vsock_connect_addr(const struct sockaddr_vm *svm, Error **errp)
{
    int sock, rc;

    sock = qemu_socket(AF_VSOCK, SOCK_STREAM, 0);
    if (sock < 0) {
        error_setg_errno(errp, errno, "Failed to create socket");
        return -1;
    }

    /* connect to peer */
    do {
        rc = 0;
        if (connect(sock, (const struct sockaddr *)svm, sizeof(*svm)) < 0) {
            rc = -errno;
        }
    } while (rc == -EINTR);

    if (rc < 0) {
        error_setg_errno(errp, errno, "Failed to connect socket");
        closesocket(sock);
        return -1;
    }

    return sock;
}

static int vsock_connect_addr(const struct sockaddr_vm *svm, bool *in_progress,
                              ConnectState *connect_state, Error **errp)
{
    int sock, rc;

    *in_progress = false;

    sock = qemu_socket(AF_VSOCK, SOCK_STREAM, 0);
    if (sock < 0) {
        error_setg_errno(errp, errno, "Failed to create socket");
        return -1;
    }
    if (connect_state != NULL) {
        qemu_set_nonblock(sock);
    }
    /* connect to peer */
    do {
        rc = 0;
        if (connect(sock, (const struct sockaddr *)svm, sizeof(*svm)) < 0) {
            rc = -errno;
        }
    } while (rc == -EINTR);

    if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) {
        connect_state->fd = sock;
        qemu_set_fd_handler(sock, NULL, wait_for_connect, connect_state);
        *in_progress = true;
    } else if (rc < 0) {
        error_setg_errno(errp, errno, "Failed to connect socket");
        closesocket(sock);
        return -1;
    }
    return sock;
}

static int icmp_send(struct socket *so, struct mbuf *m, int hlen)
{
    struct ip *ip = mtod(m, struct ip *);
    struct sockaddr_in addr;

    so->s = qemu_socket(AF_INET, SOCK_DGRAM, IPPROTO_ICMP);
    if (so->s == -1) {
        return -1;
    }

    so->so_m = m;
    so->so_faddr = ip->ip_dst;
    so->so_laddr = ip->ip_src;
    so->so_iptos = ip->ip_tos;
    so->so_type = IPPROTO_ICMP;
    so->so_state = SS_ISFCONNECTED;
    so->so_expire = curtime + SO_EXPIRE;

    addr.sin_family = AF_INET;
    addr.sin_addr = so->so_faddr;

    insque(so, &so->slirp->icmp);

    if (sendto(so->s, m->m_data + hlen, m->m_len - hlen, 0,
               (struct sockaddr *)&addr, sizeof(addr)) == -1) {
        DEBUG_MISC((dfd, "icmp_input icmp sendto tx errno = %d-%s\n",
                    errno, strerror(errno)));
        icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_NET, 0, strerror(errno));
        icmp_detach(so);
    }

    return 0;
}

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_setg_errno(errp, errno, "Failed to create socket");
        return -1;
    }
    socket_set_fast_reuse(sock);
    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 = -errno;
        }
    } while (rc == -EINTR);

    if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) {
        connect_state->fd = sock;
        qemu_set_fd_handler(sock, NULL, wait_for_connect, connect_state);
        *in_progress = true;
    } else if (rc < 0) {
        error_setg_errno(errp, errno, "Failed to connect socket");
        closesocket(sock);
        return -1;
    }
    return sock;
}

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 (path == NULL) {
        error_setg(errp, "unix connect: no path specified");
        return -1;
    }

    sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
    if (sock < 0) {
        error_setg_errno(errp, errno, "Failed to create socket");
        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, NULL, opaque);
        }
    }

    if (rc < 0) {
        error_setg_errno(errp, -rc, "Failed to connect socket");
        close(sock);
        sock = -1;
    }

    g_free(connect_state);
    return sock;
}

static int create_fast_reuse_socket(struct addrinfo *e)
{
    int slisten = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
    if (slisten < 0) {
        return -1;
    }
    socket_set_fast_reuse(slisten);
    return slisten;
}

int
udp_attach(struct socket *so)
{
  if((so->s = qemu_socket(AF_INET,SOCK_DGRAM,0)) != -1) {
    so->so_expire = curtime + SO_EXPIRE;
    insque(so, &so->slirp->udb);
  }
  return(so->s);
}

static int net_socket_udp_init(NetClientState *peer,
                                 const char *model,
                                 const char *name,
                                 const char *rhost,
                                 const char *lhost)
{
    NetSocketState *s;
    int fd, val, ret;
    struct sockaddr_in laddr, raddr;

    if (parse_host_port(&laddr, lhost) < 0) {
        return -1;
    }

    if (parse_host_port(&raddr, rhost) < 0) {
        return -1;
    }

    fd = qemu_socket(PF_INET, SOCK_DGRAM, 0);
    if (fd < 0) {
        perror("socket(PF_INET, SOCK_DGRAM)");
        return -1;
    }
    val = 1;
    ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
                   (const char *)&val, sizeof(val));
    if (ret < 0) {
        perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
        closesocket(fd);
        return -1;
    }
    ret = bind(fd, (struct sockaddr *)&laddr, sizeof(laddr));
    if (ret < 0) {
        perror("bind");
        closesocket(fd);
        return -1;
    }

    s = net_socket_fd_init(peer, model, name, fd, 0);
    if (!s) {
        return -1;
    }

    s->dgram_dst = raddr;

    snprintf(s->nc.info_str, sizeof(s->nc.info_str),
             "socket: udp=%s:%d",
             inet_ntoa(raddr.sin_addr), ntohs(raddr.sin_port));
    return 0;
}

static int net_socket_connect_init(NetClientState *peer,
                                   const char *model,
                                   const char *name,
                                   const char *host_str)
{
    NetSocketState *s;
    int fd, connected, ret, err;
    struct sockaddr_in saddr;

    if (parse_host_port(&saddr, host_str) < 0)
        return -1;

    fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
    if (fd < 0) {
        perror("socket");
        return -1;
    }
    socket_set_nonblock(fd);

    connected = 0;
    for(;;) {
        ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
        if (ret < 0) {
            err = socket_error();
            if (err == EINTR || err == EWOULDBLOCK) {
            } else if (err == EINPROGRESS) {
                break;
#ifdef _WIN32
            } else if (err == WSAEALREADY || err == WSAEINVAL) {
                break;
#endif
            } else {
                perror("connect");
                closesocket(fd);
                return -1;
            }
        } else {
            connected = 1;
            break;
        }
    }
    s = net_socket_fd_init(peer, model, name, fd, connected);
    if (!s)
        return -1;
    snprintf(s->nc.info_str, sizeof(s->nc.info_str),
             "socket: connect to %s:%d",
             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
    return 0;
}

int unix_listen_opts(QemuOpts *opts)
{
    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) {
        perror("socket(unix)");
        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) {
        fprintf(stderr, "bind(unix:%s): %s\n", un.sun_path, strerror(errno));
        goto err;
    }
    if (listen(sock, 1) < 0) {
        fprintf(stderr, "listen(unix:%s): %s\n", un.sun_path, strerror(errno));
        goto err;
    }

    if (sockets_debug)
        fprintf(stderr, "bind(unix:%s): OK\n", un.sun_path);
    return sock;

err:
    closesocket(sock);
    return -1;
}

static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp)
{
    struct sockaddr_un un;
    int sock, rc;
    size_t pathlen;

    if (saddr->path == NULL) {
        error_setg(errp, "unix connect: no path specified");
        return -1;
    }

    sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
    if (sock < 0) {
        error_setg_errno(errp, errno, "Failed to create socket");
        return -1;
    }

    pathlen = strlen(saddr->path);
    if (pathlen > sizeof(un.sun_path)) {
        error_setg(errp, "UNIX socket path '%s' is too long", saddr->path);
        error_append_hint(errp, "Path must be less than %zu bytes\n",
                          sizeof(un.sun_path));
        goto err;
    }

    memset(&un, 0, sizeof(un));
    un.sun_family = AF_UNIX;
    memcpy(un.sun_path, saddr->path, pathlen);

    /* connect to peer */
    do {
        rc = 0;
        if (connect(sock, (struct sockaddr *) &un, sizeof(un)) < 0) {
            rc = -errno;
        }
    } while (rc == -EINTR);

    if (rc < 0) {
        error_setg_errno(errp, -rc, "Failed to connect socket %s",
                         saddr->path);
        goto err;
    }

    return sock;

 err:
    close(sock);
    return -1;
}

static int net_socket_listen_init(VLANState *vlan,
                                  const char *model,
                                  const char *name,
                                  const char *host_str)
{
    NetSocketListenState *s;
    int fd, val, ret;
    struct sockaddr_in saddr;

    if (parse_host_port(&saddr, host_str) < 0)
        return -1;

    s = g_malloc0(sizeof(NetSocketListenState));

    fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
    if (fd < 0) {
        perror("socket");
        g_free(s);
        return -1;
    }
    socket_set_nonblock(fd);

    /* allow fast reuse */
    val = 1;
    setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));

    ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
    if (ret < 0) {
        perror("bind");
        g_free(s);
        closesocket(fd);
        return -1;
    }
    ret = listen(fd, 0);
    if (ret < 0) {
        perror("listen");
        g_free(s);
        closesocket(fd);
        return -1;
    }
    s->vlan = vlan;
    s->model = g_strdup(model);
    s->name = name ? g_strdup(name) : NULL;
    s->fd = fd;
    qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
    return 0;
}