Release 4.8 net/bluetooth/cmtp/sock.c

/*
   CMTP implementation for Linux Bluetooth stack (BlueZ).
   Copyright (C) 2002-2003 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/types.h>
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/poll.h>
#include <linux/fcntl.h>
#include <linux/skbuff.h>
#include <linux/socket.h>
#include <linux/ioctl.h>
#include <linux/file.h>
#include <linux/compat.h>
#include <linux/gfp.h>
#include <linux/uaccess.h>
#include <net/sock.h>

#include <linux/isdn/capilli.h>


#include "cmtp.h"


static struct bt_sock_list cmtp_sk_list = {
	.lock = __RW_LOCK_UNLOCKED(cmtp_sk_list.lock)
};



static int cmtp_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(&cmtp_sk_list, sk);

	sock_orphan(sk);
	sock_put(sk);

	return 0;
}

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marcel holtmann
marcel holtmann
50
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1
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masatake yamato
masatake yamato
8
13.79%
1
50.00%
Total
58
100.00%
2
100.00%



static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
	struct cmtp_connadd_req ca;
	struct cmtp_conndel_req cd;
	struct cmtp_connlist_req cl;
	struct cmtp_conninfo ci;
	struct socket *nsock;
	void __user *argp = (void __user *)arg;
	int err;

	BT_DBG("cmd %x arg %lx", cmd, arg);

	switch (cmd) {
	case CMTPCONNADD:
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;

		if (copy_from_user(&ca, argp, sizeof(ca)))
			return -EFAULT;

		nsock = sockfd_lookup(ca.sock, &err);
		if (!nsock)
			return err;

		if (nsock->sk->sk_state != BT_CONNECTED) {
			sockfd_put(nsock);
			return -EBADFD;
		}

		err = cmtp_add_connection(&ca, nsock);
		if (!err) {
			if (copy_to_user(argp, &ca, sizeof(ca)))
				err = -EFAULT;
		} else
			sockfd_put(nsock);

		return err;

	case CMTPCONNDEL:
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;

		if (copy_from_user(&cd, argp, sizeof(cd)))
			return -EFAULT;

		return cmtp_del_connection(&cd);

	case CMTPGETCONNLIST:
		if (copy_from_user(&cl, argp, sizeof(cl)))
			return -EFAULT;

		if (cl.cnum <= 0)
			return -EINVAL;

		err = cmtp_get_connlist(&cl);
		if (!err && copy_to_user(argp, &cl, sizeof(cl)))
			return -EFAULT;

		return err;

	case CMTPGETCONNINFO:
		if (copy_from_user(&ci, argp, sizeof(ci)))
			return -EFAULT;

		err = cmtp_get_conninfo(&ci);
		if (!err && copy_to_user(argp, &ci, sizeof(ci)))
			return -EFAULT;

		return err;
	}

	return -EINVAL;
}

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marcel holtmann
marcel holtmann
335
93.58%
2
40.00%
al viro
al viro
19
5.31%
1
20.00%
zhao hongjiang
zhao hongjiang
2
0.56%
1
20.00%
julia lawall
julia lawall
2
0.56%
1
20.00%
Total
358
100.00%
5
100.00%

#ifdef CONFIG_COMPAT


static int cmtp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
	if (cmd == CMTPGETCONNLIST) {
		struct cmtp_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 = cmtp_get_connlist(&cl);

		if (!err && put_user(cl.cnum, (u32 __user *) arg))
			err = -EFAULT;

		return err;
	}

	return cmtp_sock_ioctl(sock, cmd, arg);
}
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marcel holtmann
marcel holtmann
136
97.84%
1
50.00%
johan hedberg
johan hedberg
3
2.16%
1
50.00%
Total
139
100.00%
2
100.00%

#endif


static const struct proto_ops cmtp_sock_ops = {
	.family		= PF_BLUETOOTH,
	.owner		= THIS_MODULE,
	.release	= cmtp_sock_release,
	.ioctl		= cmtp_sock_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl	= cmtp_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 cmtp_proto = {
	.name		= "CMTP",
	.owner		= THIS_MODULE,
	.obj_size	= sizeof(struct bt_sock)
};



static int cmtp_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, &cmtp_proto, kern);
	if (!sk)
		return -ENOMEM;

	sock_init_data(sock, sk);

	sock->ops = &cmtp_sock_ops;

	sock->state = SS_UNCONNECTED;

	sock_reset_flag(sk, SOCK_ZAPPED);

	sk->sk_protocol = protocol;
	sk->sk_state    = BT_OPEN;

	bt_sock_link(&cmtp_sk_list, sk);

	return 0;
}

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marcel holtmann
marcel holtmann
94
77.69%
3
37.50%
eric w. biederman
eric w. biederman
9
7.44%
2
25.00%
masatake yamato
masatake yamato
8
6.61%
1
12.50%
arnaldo carvalho de melo
arnaldo carvalho de melo
7
5.79%
1
12.50%
eric paris
eric paris
3
2.48%
1
12.50%
Total
121
100.00%
8
100.00%


static const struct net_proto_family cmtp_sock_family_ops = {
	.family	= PF_BLUETOOTH,
	.owner	= THIS_MODULE,
	.create	= cmtp_sock_create
};



int cmtp_init_sockets(void)
{
	int err;

	err = proto_register(&cmtp_proto, 0);
	if (err < 0)
		return err;

	err = bt_sock_register(BTPROTO_CMTP, &cmtp_sock_family_ops);
	if (err < 0) {
		BT_ERR("Can't register CMTP socket");
		goto error;
	}

	err = bt_procfs_init(&init_net, "cmtp", &cmtp_sk_list, NULL);
	if (err < 0) {
		BT_ERR("Failed to create CMTP proc file");
		bt_sock_unregister(BTPROTO_HIDP);
		goto error;
	}

	BT_INFO("CMTP socket layer initialized");

	return 0;

error:
	proto_unregister(&cmtp_proto);
	return err;
}

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46
41.82%
1
33.33%
marcel holtmann
marcel holtmann
16
14.55%
1
33.33%
Total
110
100.00%
3
100.00%



void cmtp_cleanup_sockets(void)
{
	bt_procfs_cleanup(&init_net, "cmtp");
	bt_sock_unregister(BTPROTO_CMTP);
	proto_unregister(&cmtp_proto);
}
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marcel holtmann
marcel holtmann
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46.15%
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33.33%
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masatake yamato
8
30.77%
1
33.33%
arnaldo carvalho de melo
arnaldo carvalho de melo
6
23.08%
1
33.33%
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26
100.00%
3
100.00%

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27.27%
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87
8.40%
1
4.55%
arnaldo carvalho de melo
arnaldo carvalho de melo
85
8.20%
1
4.55%
al viro
al viro
19
1.83%
1
4.55%
eric w. biederman
eric w. biederman
9
0.87%
2
9.09%
szymon janc
szymon janc
3
0.29%
1
4.55%
randy dunlap
randy dunlap
3
0.29%
1
4.55%
eric paris
eric paris
3
0.29%
1
4.55%
johan hedberg
johan hedberg
3
0.29%
1
4.55%
tejun heo
tejun heo
3
0.29%
1
4.55%
julia lawall
julia lawall
2
0.19%
1
4.55%
zhao hongjiang
zhao hongjiang
2
0.19%
1
4.55%
stephen hemminger
stephen hemminger
1
0.10%
1
4.55%
eric dumazet
eric dumazet
1
0.10%
1
4.55%
syam sidhardhan
syam sidhardhan
1
0.10%
1
4.55%
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hideaki yoshifuji
1
0.10%
1
4.55%
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1036
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Directory: net/bluetooth/cmtp

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