mirror of https://gitee.com/openkylin/linux.git
300 lines
6.8 KiB
C
300 lines
6.8 KiB
C
/*
|
|
HIDP implementation for Linux Bluetooth stack (BlueZ).
|
|
Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org>
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License version 2 as
|
|
published by the Free Software Foundation;
|
|
|
|
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 OF THIRD PARTY RIGHTS.
|
|
IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
|
|
CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
|
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
|
|
COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
|
|
SOFTWARE IS DISCLAIMED.
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/file.h>
|
|
|
|
#include "hidp.h"
|
|
|
|
static struct bt_sock_list hidp_sk_list = {
|
|
.lock = __RW_LOCK_UNLOCKED(hidp_sk_list.lock)
|
|
};
|
|
|
|
static int hidp_sock_release(struct socket *sock)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
|
|
BT_DBG("sock %p sk %p", sock, sk);
|
|
|
|
if (!sk)
|
|
return 0;
|
|
|
|
bt_sock_unlink(&hidp_sk_list, sk);
|
|
|
|
sock_orphan(sk);
|
|
sock_put(sk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
|
|
{
|
|
void __user *argp = (void __user *) arg;
|
|
struct hidp_connadd_req ca;
|
|
struct hidp_conndel_req cd;
|
|
struct hidp_connlist_req cl;
|
|
struct hidp_conninfo ci;
|
|
struct socket *csock;
|
|
struct socket *isock;
|
|
int err;
|
|
|
|
BT_DBG("cmd %x arg %lx", cmd, arg);
|
|
|
|
switch (cmd) {
|
|
case HIDPCONNADD:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (copy_from_user(&ca, argp, sizeof(ca)))
|
|
return -EFAULT;
|
|
|
|
csock = sockfd_lookup(ca.ctrl_sock, &err);
|
|
if (!csock)
|
|
return err;
|
|
|
|
isock = sockfd_lookup(ca.intr_sock, &err);
|
|
if (!isock) {
|
|
sockfd_put(csock);
|
|
return err;
|
|
}
|
|
|
|
err = hidp_connection_add(&ca, csock, isock);
|
|
if (!err && copy_to_user(argp, &ca, sizeof(ca)))
|
|
err = -EFAULT;
|
|
|
|
sockfd_put(csock);
|
|
sockfd_put(isock);
|
|
|
|
return err;
|
|
|
|
case HIDPCONNDEL:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (copy_from_user(&cd, argp, sizeof(cd)))
|
|
return -EFAULT;
|
|
|
|
return hidp_connection_del(&cd);
|
|
|
|
case HIDPGETCONNLIST:
|
|
if (copy_from_user(&cl, argp, sizeof(cl)))
|
|
return -EFAULT;
|
|
|
|
if (cl.cnum <= 0)
|
|
return -EINVAL;
|
|
|
|
err = hidp_get_connlist(&cl);
|
|
if (!err && copy_to_user(argp, &cl, sizeof(cl)))
|
|
return -EFAULT;
|
|
|
|
return err;
|
|
|
|
case HIDPGETCONNINFO:
|
|
if (copy_from_user(&ci, argp, sizeof(ci)))
|
|
return -EFAULT;
|
|
|
|
err = hidp_get_conninfo(&ci);
|
|
if (!err && copy_to_user(argp, &ci, sizeof(ci)))
|
|
return -EFAULT;
|
|
|
|
return err;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
struct compat_hidp_connadd_req {
|
|
int ctrl_sock; /* Connected control socket */
|
|
int intr_sock; /* Connected interrupt socket */
|
|
__u16 parser;
|
|
__u16 rd_size;
|
|
compat_uptr_t rd_data;
|
|
__u8 country;
|
|
__u8 subclass;
|
|
__u16 vendor;
|
|
__u16 product;
|
|
__u16 version;
|
|
__u32 flags;
|
|
__u32 idle_to;
|
|
char name[128];
|
|
};
|
|
|
|
static int hidp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
|
|
{
|
|
if (cmd == HIDPGETCONNLIST) {
|
|
struct hidp_connlist_req cl;
|
|
u32 uci;
|
|
int err;
|
|
|
|
if (get_user(cl.cnum, (u32 __user *) arg) ||
|
|
get_user(uci, (u32 __user *) (arg + 4)))
|
|
return -EFAULT;
|
|
|
|
cl.ci = compat_ptr(uci);
|
|
|
|
if (cl.cnum <= 0)
|
|
return -EINVAL;
|
|
|
|
err = hidp_get_connlist(&cl);
|
|
|
|
if (!err && put_user(cl.cnum, (u32 __user *) arg))
|
|
err = -EFAULT;
|
|
|
|
return err;
|
|
} else if (cmd == HIDPCONNADD) {
|
|
struct compat_hidp_connadd_req ca;
|
|
struct hidp_connadd_req __user *uca;
|
|
|
|
uca = compat_alloc_user_space(sizeof(*uca));
|
|
|
|
if (copy_from_user(&ca, (void __user *) arg, sizeof(ca)))
|
|
return -EFAULT;
|
|
|
|
if (put_user(ca.ctrl_sock, &uca->ctrl_sock) ||
|
|
put_user(ca.intr_sock, &uca->intr_sock) ||
|
|
put_user(ca.parser, &uca->parser) ||
|
|
put_user(ca.rd_size, &uca->rd_size) ||
|
|
put_user(compat_ptr(ca.rd_data), &uca->rd_data) ||
|
|
put_user(ca.country, &uca->country) ||
|
|
put_user(ca.subclass, &uca->subclass) ||
|
|
put_user(ca.vendor, &uca->vendor) ||
|
|
put_user(ca.product, &uca->product) ||
|
|
put_user(ca.version, &uca->version) ||
|
|
put_user(ca.flags, &uca->flags) ||
|
|
put_user(ca.idle_to, &uca->idle_to) ||
|
|
copy_to_user(&uca->name[0], &ca.name[0], 128))
|
|
return -EFAULT;
|
|
|
|
arg = (unsigned long) uca;
|
|
|
|
/* Fall through. We don't actually write back any _changes_
|
|
to the structure anyway, so there's no need to copy back
|
|
into the original compat version */
|
|
}
|
|
|
|
return hidp_sock_ioctl(sock, cmd, arg);
|
|
}
|
|
#endif
|
|
|
|
static const struct proto_ops hidp_sock_ops = {
|
|
.family = PF_BLUETOOTH,
|
|
.owner = THIS_MODULE,
|
|
.release = hidp_sock_release,
|
|
.ioctl = hidp_sock_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = hidp_sock_compat_ioctl,
|
|
#endif
|
|
.bind = sock_no_bind,
|
|
.getname = sock_no_getname,
|
|
.sendmsg = sock_no_sendmsg,
|
|
.recvmsg = sock_no_recvmsg,
|
|
.poll = sock_no_poll,
|
|
.listen = sock_no_listen,
|
|
.shutdown = sock_no_shutdown,
|
|
.setsockopt = sock_no_setsockopt,
|
|
.getsockopt = sock_no_getsockopt,
|
|
.connect = sock_no_connect,
|
|
.socketpair = sock_no_socketpair,
|
|
.accept = sock_no_accept,
|
|
.mmap = sock_no_mmap
|
|
};
|
|
|
|
static struct proto hidp_proto = {
|
|
.name = "HIDP",
|
|
.owner = THIS_MODULE,
|
|
.obj_size = sizeof(struct bt_sock)
|
|
};
|
|
|
|
static int hidp_sock_create(struct net *net, struct socket *sock, int protocol,
|
|
int kern)
|
|
{
|
|
struct sock *sk;
|
|
|
|
BT_DBG("sock %p", sock);
|
|
|
|
if (sock->type != SOCK_RAW)
|
|
return -ESOCKTNOSUPPORT;
|
|
|
|
sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto);
|
|
if (!sk)
|
|
return -ENOMEM;
|
|
|
|
sock_init_data(sock, sk);
|
|
|
|
sock->ops = &hidp_sock_ops;
|
|
|
|
sock->state = SS_UNCONNECTED;
|
|
|
|
sock_reset_flag(sk, SOCK_ZAPPED);
|
|
|
|
sk->sk_protocol = protocol;
|
|
sk->sk_state = BT_OPEN;
|
|
|
|
bt_sock_link(&hidp_sk_list, sk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct net_proto_family hidp_sock_family_ops = {
|
|
.family = PF_BLUETOOTH,
|
|
.owner = THIS_MODULE,
|
|
.create = hidp_sock_create
|
|
};
|
|
|
|
int __init hidp_init_sockets(void)
|
|
{
|
|
int err;
|
|
|
|
err = proto_register(&hidp_proto, 0);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = bt_sock_register(BTPROTO_HIDP, &hidp_sock_family_ops);
|
|
if (err < 0) {
|
|
BT_ERR("Can't register HIDP socket");
|
|
goto error;
|
|
}
|
|
|
|
err = bt_procfs_init(&init_net, "hidp", &hidp_sk_list, NULL);
|
|
if (err < 0) {
|
|
BT_ERR("Failed to create HIDP proc file");
|
|
bt_sock_unregister(BTPROTO_HIDP);
|
|
goto error;
|
|
}
|
|
|
|
BT_INFO("HIDP socket layer initialized");
|
|
|
|
return 0;
|
|
|
|
error:
|
|
proto_unregister(&hidp_proto);
|
|
return err;
|
|
}
|
|
|
|
void __exit hidp_cleanup_sockets(void)
|
|
{
|
|
bt_procfs_cleanup(&init_net, "hidp");
|
|
bt_sock_unregister(BTPROTO_HIDP);
|
|
proto_unregister(&hidp_proto);
|
|
}
|