Release 4.11 net/bluetooth/rfcomm/sock.c

/*
   RFCOMM implementation for Linux Bluetooth stack (BlueZ).
   Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
   Copyright (C) 2002 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.
*/

/*
 * RFCOMM sockets.
 */

#include <linux/export.h>
#include <linux/debugfs.h>
#include <linux/sched/signal.h>

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include <net/bluetooth/l2cap.h>
#include <net/bluetooth/rfcomm.h>


static const struct proto_ops rfcomm_sock_ops;


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

static void rfcomm_sock_close(struct sock *sk);
static void rfcomm_sock_kill(struct sock *sk);

/* ---- DLC callbacks ----
 *
 * called under rfcomm_dlc_lock()
 */


static void rfcomm_sk_data_ready(struct rfcomm_dlc *d, struct sk_buff *skb)
{
	struct sock *sk = d->owner;
	if (!sk)
		return;

	atomic_add(skb->len, &sk->sk_rmem_alloc);
	skb_queue_tail(&sk->sk_receive_queue, skb);
	sk->sk_data_ready(sk);

	if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf)
		rfcomm_dlc_throttle(d);
}

Contributors
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Maksim Krasnyanskiy
74
93.67%
1
50.00%
Arnaldo Carvalho de Melo
5
6.33%
1
50.00%
Total
79
100.00%
2
100.00%



static void rfcomm_sk_state_change(struct rfcomm_dlc *d, int err)
{
	struct sock *sk = d->owner, *parent;
	unsigned long flags;

	if (!sk)
		return;

	BT_DBG("dlc %p state %ld err %d", d, d->state, err);

	local_irq_save(flags);
	bh_lock_sock(sk);

	if (err)
		sk->sk_err = err;

	sk->sk_state = d->state;

	parent = bt_sk(sk)->parent;
	if (parent) {
		if (d->state == BT_CLOSED) {
			sock_set_flag(sk, SOCK_ZAPPED);
			bt_accept_unlink(sk);
		}
		parent->sk_data_ready(parent);
	} else {
		if (d->state == BT_CONNECTED)
			rfcomm_session_getaddr(d->session,
					       &rfcomm_pi(sk)->src, NULL);
		sk->sk_state_change(sk);
	}

	bh_unlock_sock(sk);
	local_irq_restore(flags);

	if (parent && sock_flag(sk, SOCK_ZAPPED)) {
		/* We have to drop DLC lock here, otherwise
                 * rfcomm_sock_destruct() will dead lock. */
		rfcomm_dlc_unlock(d);
		rfcomm_sock_kill(sk);
		rfcomm_dlc_lock(d);
	}
}

Contributors
Person
Tokens
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Commits
CommitProp
Maksim Krasnyanskiy
118
60.51%
3
33.33%
Marcel Holtmann
50
25.64%
3
33.33%
Gustavo Fernando Padovan
14
7.18%
1
11.11%
Thomas Graf
10
5.13%
1
11.11%
Arnaldo Carvalho de Melo
3
1.54%
1
11.11%
Total
195
100.00%
9
100.00%

/* ---- Socket functions ---- */


static struct sock *__rfcomm_get_listen_sock_by_addr(u8 channel, bdaddr_t *src)
{
	struct sock *sk = NULL;

	sk_for_each(sk, &rfcomm_sk_list.head) {
		if (rfcomm_pi(sk)->channel != channel)
			continue;

		if (bacmp(&rfcomm_pi(sk)->src, src))
			continue;

		if (sk->sk_state == BT_BOUND || sk->sk_state == BT_LISTEN)
			break;
	}

	return sk ? sk : NULL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
45
56.25%
1
14.29%
Andrzej Kaczmarek
21
26.25%
1
14.29%
Arnaldo Carvalho de Melo
9
11.25%
1
14.29%
Marcel Holtmann
2
2.50%
2
28.57%
Andrew Morton
2
2.50%
1
14.29%
Sasha Levin
1
1.25%
1
14.29%
Total
80
100.00%
7
100.00%

/* Find socket with channel and source bdaddr.
 * Returns closest match.
 */


static struct sock *rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
{
	struct sock *sk = NULL, *sk1 = NULL;

	read_lock(&rfcomm_sk_list.lock);

	sk_for_each(sk, &rfcomm_sk_list.head) {
		if (state && sk->sk_state != state)
			continue;

		if (rfcomm_pi(sk)->channel == channel) {
			/* Exact match. */
			if (!bacmp(&rfcomm_pi(sk)->src, src))
				break;

			/* Closest match */
			if (!bacmp(&rfcomm_pi(sk)->src, BDADDR_ANY))
				sk1 = sk;
		}
	}

	read_unlock(&rfcomm_sk_list.lock);

	return sk ? sk : sk1;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
98
79.03%
1
12.50%
Gustavo Fernando Padovan
13
10.48%
1
12.50%
Arnaldo Carvalho de Melo
7
5.65%
2
25.00%
Marcel Holtmann
3
2.42%
2
25.00%
Andrew Morton
2
1.61%
1
12.50%
Sasha Levin
1
0.81%
1
12.50%
Total
124
100.00%
8
100.00%



static void rfcomm_sock_destruct(struct sock *sk)
{
	struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;

	BT_DBG("sk %p dlc %p", sk, d);

	skb_queue_purge(&sk->sk_receive_queue);
	skb_queue_purge(&sk->sk_write_queue);

	rfcomm_dlc_lock(d);
	rfcomm_pi(sk)->dlc = NULL;

	/* Detach DLC if it's owned by this socket */
	if (d->owner == sk)
		d->owner = NULL;
	rfcomm_dlc_unlock(d);

	rfcomm_dlc_put(d);
}

Contributors
Person
Tokens
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CommitProp
Maksim Krasnyanskiy
85
97.70%
1
50.00%
Arnaldo Carvalho de Melo
2
2.30%
1
50.00%
Total
87
100.00%
2
100.00%



static void rfcomm_sock_cleanup_listen(struct sock *parent)
{
	struct sock *sk;

	BT_DBG("parent %p", parent);

	/* Close not yet accepted dlcs */
	while ((sk = bt_accept_dequeue(parent, NULL))) {
		rfcomm_sock_close(sk);
		rfcomm_sock_kill(sk);
	}

	parent->sk_state  = BT_CLOSED;
	sock_set_flag(parent, SOCK_ZAPPED);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
56
90.32%
3
60.00%
Thomas Graf
5
8.06%
1
20.00%
Arnaldo Carvalho de Melo
1
1.61%
1
20.00%
Total
62
100.00%
5
100.00%

/* Kill socket (only if zapped and orphan)
 * Must be called on unlocked socket.
 */


static void rfcomm_sock_kill(struct sock *sk)
{
	if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
		return;

	BT_DBG("sk %p state %d refcnt %d", sk, sk->sk_state, atomic_read(&sk->sk_refcnt));

	/* Kill poor orphan */
	bt_sock_unlink(&rfcomm_sk_list, sk);
	sock_set_flag(sk, SOCK_DEAD);
	sock_put(sk);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
53
80.30%
2
28.57%
Arnaldo Carvalho de Melo
5
7.58%
2
28.57%
Thomas Graf
5
7.58%
1
14.29%
James Morris
2
3.03%
1
14.29%
David S. Miller
1
1.52%
1
14.29%
Total
66
100.00%
7
100.00%



static void __rfcomm_sock_close(struct sock *sk)
{
	struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;

	BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);

	switch (sk->sk_state) {
	case BT_LISTEN:
		rfcomm_sock_cleanup_listen(sk);
		break;

	case BT_CONNECT:
	case BT_CONNECT2:
	case BT_CONFIG:
	case BT_CONNECTED:
		rfcomm_dlc_close(d, 0);

	default:
		sock_set_flag(sk, SOCK_ZAPPED);
		break;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
75
90.36%
2
50.00%
Thomas Graf
5
6.02%
1
25.00%
Arnaldo Carvalho de Melo
3
3.61%
1
25.00%
Total
83
100.00%
4
100.00%

/* Close socket.
 * Must be called on unlocked socket.
 */


static void rfcomm_sock_close(struct sock *sk)
{
	lock_sock(sk);
	__rfcomm_sock_close(sk);
	release_sock(sk);
}

Contributors
Person
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CommitProp
Maksim Krasnyanskiy
26
100.00%
2
100.00%
Total
26
100.00%
2
100.00%



static void rfcomm_sock_init(struct sock *sk, struct sock *parent)
{
	struct rfcomm_pinfo *pi = rfcomm_pi(sk);

	BT_DBG("sk %p", sk);

	if (parent) {
		sk->sk_type = parent->sk_type;
		pi->dlc->defer_setup = test_bit(BT_SK_DEFER_SETUP,
						&bt_sk(parent)->flags);

		pi->sec_level = rfcomm_pi(parent)->sec_level;
		pi->role_switch = rfcomm_pi(parent)->role_switch;

		security_sk_clone(parent, sk);
	} else {
		pi->dlc->defer_setup = 0;

		pi->sec_level = BT_SECURITY_LOW;
		pi->role_switch = 0;
	}

	pi->dlc->sec_level = pi->sec_level;
	pi->dlc->role_switch = pi->role_switch;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
89
64.49%
3
42.86%
Maksim Krasnyanskiy
33
23.91%
1
14.29%
Paul Moore
7
5.07%
1
14.29%
Gustavo Fernando Padovan
7
5.07%
1
14.29%
Arnaldo Carvalho de Melo
2
1.45%
1
14.29%
Total
138
100.00%
7
100.00%


static struct proto rfcomm_proto = {
	.name		= "RFCOMM",
	.owner		= THIS_MODULE,
	.obj_size	= sizeof(struct rfcomm_pinfo)
};



static struct sock *rfcomm_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio, int kern)
{
	struct rfcomm_dlc *d;
	struct sock *sk;

	sk = sk_alloc(net, PF_BLUETOOTH, prio, &rfcomm_proto, kern);
	if (!sk)
		return NULL;

	sock_init_data(sock, sk);
	INIT_LIST_HEAD(&bt_sk(sk)->accept_q);

	d = rfcomm_dlc_alloc(prio);
	if (!d) {
		sk_free(sk);
		return NULL;
	}

	d->data_ready   = rfcomm_sk_data_ready;
	d->state_change = rfcomm_sk_state_change;

	rfcomm_pi(sk)->dlc = d;
	d->owner = sk;

	sk->sk_destruct = rfcomm_sock_destruct;
	sk->sk_sndtimeo = RFCOMM_CONN_TIMEOUT;

	sk->sk_sndbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10;
	sk->sk_rcvbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10;

	sock_reset_flag(sk, SOCK_ZAPPED);

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

	bt_sock_link(&rfcomm_sk_list, sk);

	BT_DBG("sk %p", sk);
	return sk;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
148
75.13%
2
25.00%
Marcel Holtmann
28
14.21%
1
12.50%
Eric W. Biedermann
12
6.09%
2
25.00%
Arnaldo Carvalho de Melo
8
4.06%
2
25.00%
Al Viro
1
0.51%
1
12.50%
Total
197
100.00%
8
100.00%



static int rfcomm_sock_create(struct net *net, struct socket *sock,
			      int protocol, int kern)
{
	struct sock *sk;

	BT_DBG("sock %p", sock);

	sock->state = SS_UNCONNECTED;

	if (sock->type != SOCK_STREAM && sock->type != SOCK_RAW)
		return -ESOCKTNOSUPPORT;

	sock->ops = &rfcomm_sock_ops;

	sk = rfcomm_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
	if (!sk)
		return -ENOMEM;

	rfcomm_sock_init(sk, NULL);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
81
81.82%
1
20.00%
Eric W. Biedermann
9
9.09%
2
40.00%
Marcel Holtmann
6
6.06%
1
20.00%
Eric Paris
3
3.03%
1
20.00%
Total
99
100.00%
5
100.00%



static int rfcomm_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
{
	struct sockaddr_rc sa;
	struct sock *sk = sock->sk;
	int len, err = 0;

	if (!addr || addr->sa_family != AF_BLUETOOTH)
		return -EINVAL;

	memset(&sa, 0, sizeof(sa));
	len = min_t(unsigned int, sizeof(sa), addr_len);
	memcpy(&sa, addr, len);

	BT_DBG("sk %p %pMR", sk, &sa.rc_bdaddr);

	lock_sock(sk);

	if (sk->sk_state != BT_OPEN) {
		err = -EBADFD;
		goto done;
	}

	if (sk->sk_type != SOCK_STREAM) {
		err = -EINVAL;
		goto done;
	}

	write_lock(&rfcomm_sk_list.lock);

	if (sa.rc_channel &&
	    __rfcomm_get_listen_sock_by_addr(sa.rc_channel, &sa.rc_bdaddr)) {
		err = -EADDRINUSE;
	} else {
		/* Save source address */
		bacpy(&rfcomm_pi(sk)->src, &sa.rc_bdaddr);
		rfcomm_pi(sk)->channel = sa.rc_channel;
		sk->sk_state = BT_BOUND;
	}

	write_unlock(&rfcomm_sk_list.lock);

done:
	release_sock(sk);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
146
63.76%
1
14.29%
Jaganath Kanakkassery
59
25.76%
1
14.29%
Marcel Holtmann
19
8.30%
2
28.57%
Gustavo Fernando Padovan
2
0.87%
1
14.29%
Arnaldo Carvalho de Melo
2
0.87%
1
14.29%
Andrzej Kaczmarek
1
0.44%
1
14.29%
Total
229
100.00%
7
100.00%



static int rfcomm_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
{
	struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
	struct sock *sk = sock->sk;
	struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
	int err = 0;

	BT_DBG("sk %p", sk);

	if (alen < sizeof(struct sockaddr_rc) ||
	    addr->sa_family != AF_BLUETOOTH)
		return -EINVAL;

	lock_sock(sk);

	if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) {
		err = -EBADFD;
		goto done;
	}

	if (sk->sk_type != SOCK_STREAM) {
		err = -EINVAL;
		goto done;
	}

	sk->sk_state = BT_CONNECT;
	bacpy(&rfcomm_pi(sk)->dst, &sa->rc_bdaddr);
	rfcomm_pi(sk)->channel = sa->rc_channel;

	d->sec_level = rfcomm_pi(sk)->sec_level;
	d->role_switch = rfcomm_pi(sk)->role_switch;

	err = rfcomm_dlc_open(d, &rfcomm_pi(sk)->src, &sa->rc_bdaddr,
			      sa->rc_channel);
	if (!err)
		err = bt_sock_wait_state(sk, BT_CONNECTED,
				sock_sndtimeo(sk, flags & O_NONBLOCK));

done:
	release_sock(sk);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
190
77.24%
3
33.33%
Marcel Holtmann
46
18.70%
4
44.44%
Changli Gao
6
2.44%
1
11.11%
Arnaldo Carvalho de Melo
4
1.63%
1
11.11%
Total
246
100.00%
9
100.00%



static int rfcomm_sock_listen(struct socket *sock, int backlog)
{
	struct sock *sk = sock->sk;
	int err = 0;

	BT_DBG("sk %p backlog %d", sk, backlog);

	lock_sock(sk);

	if (sk->sk_state != BT_BOUND) {
		err = -EBADFD;
		goto done;
	}

	if (sk->sk_type != SOCK_STREAM) {
		err = -EINVAL;
		goto done;
	}

	if (!rfcomm_pi(sk)->channel) {
		bdaddr_t *src = &rfcomm_pi(sk)->src;
		u8 channel;

		err = -EINVAL;

		write_lock(&rfcomm_sk_list.lock);

		for (channel = 1; channel < 31; channel++)
			if (!__rfcomm_get_listen_sock_by_addr(channel, src)) {
				rfcomm_pi(sk)->channel = channel;
				err = 0;
				break;
			}

		write_unlock(&rfcomm_sk_list.lock);

		if (err < 0)
			goto done;
	}

	sk->sk_max_ack_backlog = backlog;
	sk->sk_ack_backlog = 0;
	sk->sk_state = BT_LISTEN;

done:
	release_sock(sk);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
112
55.45%
4
50.00%
Maksim Krasnyanskiy
83
41.09%
1
12.50%
Arnaldo Carvalho de Melo
4
1.98%
1
12.50%
Gustavo Fernando Padovan
2
0.99%
1
12.50%
Andrzej Kaczmarek
1
0.50%
1
12.50%
Total
202
100.00%
8
100.00%



static int rfcomm_sock_accept(struct socket *sock, struct socket *newsock, int flags,
			      bool kern)
{
	DEFINE_WAIT_FUNC(wait, woken_wake_function);
	struct sock *sk = sock->sk, *nsk;
	long timeo;
	int err = 0;

	lock_sock_nested(sk, SINGLE_DEPTH_NESTING);

	if (sk->sk_type != SOCK_STREAM) {
		err = -EINVAL;
		goto done;
	}

	timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);

	BT_DBG("sk %p timeo %ld", sk, timeo);

	/* Wait for an incoming connection. (wake-one). */
	add_wait_queue_exclusive(sk_sleep(sk), &wait);
	while (1) {
		if (sk->sk_state != BT_LISTEN) {
			err = -EBADFD;
			break;
		}

		nsk = bt_accept_dequeue(sk, newsock);
		if (nsk)
			break;

		if (!timeo) {
			err = -EAGAIN;
			break;
		}

		if (signal_pending(current)) {
			err = sock_intr_errno(timeo);
			break;
		}

		release_sock(sk);

		timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);

		lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
	}
	remove_wait_queue(sk_sleep(sk), &wait);

	if (err)
		goto done;

	newsock->state = SS_CONNECTED;

	BT_DBG("new socket %p", nsk);

done:
	release_sock(sk);
	return err;
}

Contributors
Person
Tokens
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CommitProp
Maksim Krasnyanskiy
163
68.78%
1
11.11%
Peter Hurley
42
17.72%
2
22.22%
Marcel Holtmann
15
6.33%
2
22.22%
Gustavo Fernando Padovan
6
2.53%
1
11.11%
Eric Dumazet
6
2.53%
1
11.11%
David Howells
3
1.27%
1
11.11%
Arnaldo Carvalho de Melo
2
0.84%
1
11.11%
Total
237
100.00%
9
100.00%



static int rfcomm_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer)
{
	struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
	struct sock *sk = sock->sk;

	BT_DBG("sock %p, sk %p", sock, sk);

	if (peer && sk->sk_state != BT_CONNECTED &&
	    sk->sk_state != BT_CONNECT && sk->sk_state != BT_CONNECT2)
		return -ENOTCONN;

	memset(sa, 0, sizeof(*sa));
	sa->rc_family  = AF_BLUETOOTH;
	sa->rc_channel = rfcomm_pi(sk)->channel;
	if (peer)
		bacpy(&sa->rc_bdaddr, &rfcomm_pi(sk)->dst);
	else
		bacpy(&sa->rc_bdaddr, &rfcomm_pi(sk)->src);

	*len = sizeof(struct sockaddr_rc);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
117
74.05%
1
20.00%
Johan Hedberg
26
16.46%
2
40.00%
Mathias Krause
13
8.23%
1
20.00%
Marcel Holtmann
2
1.27%
1
20.00%
Total
158
100.00%
5
100.00%



static int rfcomm_sock_sendmsg(struct socket *sock, struct msghdr *msg,
			       size_t len)
{
	struct sock *sk = sock->sk;
	struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
	struct sk_buff *skb;
	int sent;

	if (test_bit(RFCOMM_DEFER_SETUP, &d->flags))
		return -ENOTCONN;

	if (msg->msg_flags & MSG_OOB)
		return -EOPNOTSUPP;

	if (sk->sk_shutdown & SEND_SHUTDOWN)
		return -EPIPE;

	BT_DBG("sock %p, sk %p", sock, sk);

	lock_sock(sk);

	sent = bt_sock_wait_ready(sk, msg->msg_flags);
	if (sent)
		goto done;

	while (len) {
		size_t size = min_t(size_t, len, d->mtu);
		int err;

		skb = sock_alloc_send_skb(sk, size + RFCOMM_SKB_RESERVE,
				msg->msg_flags & MSG_DONTWAIT, &err);
		if (!skb) {
			if (sent == 0)
				sent = err;
			break;
		}
		skb_reserve(skb, RFCOMM_SKB_HEAD_RESERVE);

		err = memcpy_from_msg(skb_put(skb, size), msg, size);
		if (err) {
			kfree_skb(skb);
			if (sent == 0)
				sent = err;
			break;
		}

		skb->priority = sk->sk_priority;

		err = rfcomm_dlc_send(d, skb);
		if (err < 0) {
			kfree_skb(skb);
			if (sent == 0)
				sent = err;
			break;
		}

		sent += size;
		len  -= size;
	}

done:
	release_sock(sk);

	return sent;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
201
70.53%
1
10.00%
Marcel Holtmann
35
12.28%
2
20.00%
Johan Hedberg
20
7.02%
1
10.00%
Victor Shcherbatyuk
12
4.21%
1
10.00%
Luiz Augusto von Dentz
8
2.81%
1
10.00%
Stephen Hemminger
4
1.40%
1
10.00%
David S. Miller
3
1.05%
1
10.00%
Arnaldo Carvalho de Melo
1
0.35%
1
10.00%
Al Viro
1
0.35%
1
10.00%
Total
285
100.00%
10
100.00%



static int rfcomm_sock_recvmsg(struct socket *sock, struct msghdr *msg,
			       size_t size, int flags)
{
	struct sock *sk = sock->sk;
	struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
	int len;

	if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) {
		rfcomm_dlc_accept(d);
		return 0;
	}

	len = bt_sock_stream_recvmsg(sock, msg, size, flags);

	lock_sock(sk);
	if (!(flags & MSG_PEEK) && len > 0)
		atomic_sub(len, &sk->sk_rmem_alloc);

	if (atomic_read(&sk->sk_rmem_alloc) <= (sk->sk_rcvbuf >> 2))
		rfcomm_dlc_unthrottle(rfcomm_pi(sk)->dlc);
	release_sock(sk);

	return len;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
94
64.83%
1
16.67%
Marcel Holtmann
36
24.83%
2
33.33%
Mat Martineau
12
8.28%
1
16.67%
Arnaldo Carvalho de Melo
2
1.38%
1
16.67%
Stephen Hemminger
1
0.69%
1
16.67%
Total
145
100.00%
6
100.00%



static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen)
{
	struct sock *sk = sock->sk;
	int err = 0;
	u32 opt;

	BT_DBG("sk %p", sk);

	lock_sock(sk);

	switch (optname) {
	case RFCOMM_LM:
		if (get_user(opt, (u32 __user *) optval)) {
			err = -EFAULT;
			break;
		}

		if (opt & RFCOMM_LM_FIPS) {
			err = -EINVAL;
			break;
		}

		if (opt & RFCOMM_LM_AUTH)
			rfcomm_pi(sk)->sec_level = BT_SECURITY_LOW;
		if (opt & RFCOMM_LM_ENCRYPT)
			rfcomm_pi(sk)->sec_level = BT_SECURITY_MEDIUM;
		if (opt & RFCOMM_LM_SECURE)
			rfcomm_pi(sk)->sec_level = BT_SECURITY_HIGH;

		rfcomm_pi(sk)->role_switch = (opt & RFCOMM_LM_MASTER);
		break;

	default:
		err = -ENOPROTOOPT;
		break;
	}

	release_sock(sk);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
102
59.65%
4
57.14%
Maksim Krasnyanskiy
67
39.18%
1
14.29%
David S. Miller
1
0.58%
1
14.29%
Al Viro
1
0.58%
1
14.29%
Total
171
100.00%
7
100.00%



static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
{
	struct sock *sk = sock->sk;
	struct bt_security sec;
	int err = 0;
	size_t len;
	u32 opt;

	BT_DBG("sk %p", sk);

	if (level == SOL_RFCOMM)
		return rfcomm_sock_setsockopt_old(sock, optname, optval, optlen);

	if (level != SOL_BLUETOOTH)
		return -ENOPROTOOPT;

	lock_sock(sk);

	switch (optname) {
	case BT_SECURITY:
		if (sk->sk_type != SOCK_STREAM) {
			err = -EINVAL;
			break;
		}

		sec.level = BT_SECURITY_LOW;

		len = min_t(unsigned int, sizeof(sec), optlen);
		if (copy_from_user((char *) &sec, optval, len)) {
			err = -EFAULT;
			break;
		}

		if (sec.level > BT_SECURITY_HIGH) {
			err = -EINVAL;
			break;
		}

		rfcomm_pi(sk)->sec_level = sec.level;
		break;

	case BT_DEFER_SETUP:
		if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
			err = -EINVAL;
			break;
		}

		if (get_user(opt, (u32 __user *) optval)) {
			err = -EFAULT;
			break;
		}

		if (opt)
			set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
		else
			clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);

		break;

	default:
		err = -ENOPROTOOPT;
		break;
	}

	release_sock(sk);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
229
82.37%
4
44.44%
Gustavo Fernando Padovan
25
8.99%
1
11.11%
Maksim Krasnyanskiy
19
6.83%
1
11.11%
Stephen Boyd
3
1.08%
1
11.11%
David S. Miller
1
0.36%
1
11.11%
Al Viro
1
0.36%
1
11.11%
Total
278
100.00%
9
100.00%



static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen)
{
	struct sock *sk = sock->sk;
	struct sock *l2cap_sk;
	struct l2cap_conn *conn;
	struct rfcomm_conninfo cinfo;
	int len, err = 0;
	u32 opt;

	BT_DBG("sk %p", sk);

	if (get_user(len, optlen))
		return -EFAULT;

	lock_sock(sk);

	switch (optname) {
	case RFCOMM_LM:
		switch (rfcomm_pi(sk)->sec_level) {
		case BT_SECURITY_LOW:
			opt = RFCOMM_LM_AUTH;
			break;
		case BT_SECURITY_MEDIUM:
			opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT;
			break;
		case BT_SECURITY_HIGH:
			opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT |
			      RFCOMM_LM_SECURE;
			break;
		case BT_SECURITY_FIPS:
			opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT |
			      RFCOMM_LM_SECURE | RFCOMM_LM_FIPS;
			break;
		default:
			opt = 0;
			break;
		}

		if (rfcomm_pi(sk)->role_switch)
			opt |= RFCOMM_LM_MASTER;

		if (put_user(opt, (u32 __user *) optval))
			err = -EFAULT;

		break;

	case RFCOMM_CONNINFO:
		if (sk->sk_state != BT_CONNECTED &&
					!rfcomm_pi(sk)->dlc->defer_setup) {
			err = -ENOTCONN;
			break;
		}

		l2cap_sk = rfcomm_pi(sk)->dlc->session->sock->sk;
		conn = l2cap_pi(l2cap_sk)->chan->conn;

		memset(&cinfo, 0, sizeof(cinfo));
		cinfo.hci_handle = conn->hcon->handle;
		memcpy(cinfo.dev_class, conn->hcon->dev_class, 3);

		len = min_t(unsigned int, len, sizeof(cinfo));
		if (copy_to_user(optval, (char *) &cinfo, len))
			err = -EFAULT;

		break;

	default:
		err = -ENOPROTOOPT;
		break;
	}

	release_sock(sk);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
240
73.62%
6
60.00%
Maksim Krasnyanskiy
67
20.55%
1
10.00%
Filip Palian
13
3.99%
1
10.00%
Gustavo Fernando Padovan
5
1.53%
1
10.00%
Al Viro
1
0.31%
1
10.00%
Total
326
100.00%
10
100.00%



static int rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
{
	struct sock *sk = sock->sk;
	struct bt_security sec;
	int len, err = 0;

	BT_DBG("sk %p", sk);

	if (level == SOL_RFCOMM)
		return rfcomm_sock_getsockopt_old(sock, optname, optval, optlen);

	if (level != SOL_BLUETOOTH)
		return -ENOPROTOOPT;

	if (get_user(len, optlen))
		return -EFAULT;

	lock_sock(sk);

	switch (optname) {
	case BT_SECURITY:
		if (sk->sk_type != SOCK_STREAM) {
			err = -EINVAL;
			break;
		}

		sec.level = rfcomm_pi(sk)->sec_level;
		sec.key_size = 0;

		len = min_t(unsigned int, len, sizeof(sec));
		if (copy_to_user(optval, (char *) &sec, len))
			err = -EFAULT;

		break;

	case BT_DEFER_SETUP:
		if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
			err = -EINVAL;
			break;
		}

		if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
			     (u32 __user *) optval))
			err = -EFAULT;

		break;

	default:
		err = -ENOPROTOOPT;
		break;
	}

	release_sock(sk);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
233
94.72%
4
66.67%
Gustavo Fernando Padovan
7
2.85%
1
16.67%
Mathias Krause
6
2.44%
1
16.67%
Total
246
100.00%
6
100.00%



static int rfcomm_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
	struct sock *sk __maybe_unused = sock->sk;
	int err;

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

	err = bt_sock_ioctl(sock, cmd, arg);

	if (err == -ENOIOCTLCMD) {
#ifdef CONFIG_BT_RFCOMM_TTY
		lock_sock(sk);
		err = rfcomm_dev_ioctl(sk, cmd, (void __user *) arg);
		release_sock(sk);
#else
		err = -EOPNOTSUPP;
#endif
	}

	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
62
59.62%
2
40.00%
Marcel Holtmann
35
33.65%
1
20.00%
Al Viro
5
4.81%
1
20.00%
David S. Miller
2
1.92%
1
20.00%
Total
104
100.00%
5
100.00%



static int rfcomm_sock_shutdown(struct socket *sock, int how)
{
	struct sock *sk = sock->sk;
	int err = 0;

	BT_DBG("sock %p, sk %p", sock, sk);

	if (!sk)
		return 0;

	lock_sock(sk);
	if (!sk->sk_shutdown) {
		sk->sk_shutdown = SHUTDOWN_MASK;
		__rfcomm_sock_close(sk);

		if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
		    !(current->flags & PF_EXITING))
			err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
	}
	release_sock(sk);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
104
92.04%
1
50.00%
Vladimir Davydov
9
7.96%
1
50.00%
Total
113
100.00%
2
100.00%



static int rfcomm_sock_release(struct socket *sock)
{
	struct sock *sk = sock->sk;
	int err;

	BT_DBG("sock %p, sk %p", sock, sk);

	if (!sk)
		return 0;

	err = rfcomm_sock_shutdown(sock, 2);

	sock_orphan(sk);
	rfcomm_sock_kill(sk);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
62
100.00%
2
100.00%
Total
62
100.00%
2
100.00%

/* ---- RFCOMM core layer callbacks ----
 *
 * called under rfcomm_lock()
 */


int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc **d)
{
	struct sock *sk, *parent;
	bdaddr_t src, dst;
	int result = 0;

	BT_DBG("session %p channel %d", s, channel);

	rfcomm_session_getaddr(s, &src, &dst);

	/* Check if we have socket listening on channel */
	parent = rfcomm_get_sock_by_channel(BT_LISTEN, channel, &src);
	if (!parent)
		return 0;

	bh_lock_sock(parent);

	/* Check for backlog size */
	if (sk_acceptq_is_full(parent)) {
		BT_DBG("backlog full %d", parent->sk_ack_backlog);
		goto done;
	}

	sk = rfcomm_sock_alloc(sock_net(parent), NULL, BTPROTO_RFCOMM, GFP_ATOMIC, 0);
	if (!sk)
		goto done;

	bt_sock_reclassify_lock(sk, BTPROTO_RFCOMM);

	rfcomm_sock_init(sk, parent);
	bacpy(&rfcomm_pi(sk)->src, &src);
	bacpy(&rfcomm_pi(sk)->dst, &dst);
	rfcomm_pi(sk)->channel = channel;

	sk->sk_state = BT_CONFIG;
	bt_accept_enqueue(parent, sk);

	/* Accept connection and return socket DLC */
	*d = rfcomm_pi(sk)->dlc;
	result = 1;

done:
	bh_unlock_sock(parent);

	if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
		parent->sk_state_change(parent);

	return result;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
194
80.17%
3
23.08%
Marcel Holtmann
17
7.02%
2
15.38%
Gustavo Fernando Padovan
12
4.96%
2
15.38%
Octavian Purdila
7
2.89%
1
7.69%
Arnaldo Carvalho de Melo
5
2.07%
2
15.38%
Eric W. Biedermann
4
1.65%
2
15.38%
Hideaki Yoshifuji / 吉藤英明
3
1.24%
1
7.69%
Total
242
100.00%
13
100.00%



static int rfcomm_sock_debugfs_show(struct seq_file *f, void *p)
{
	struct sock *sk;

	read_lock(&rfcomm_sk_list.lock);

	sk_for_each(sk, &rfcomm_sk_list.head) {
		seq_printf(f, "%pMR %pMR %d %d\n",
			   &rfcomm_pi(sk)->src, &rfcomm_pi(sk)->dst,
			   sk->sk_state, rfcomm_pi(sk)->channel);
	}

	read_unlock(&rfcomm_sk_list.lock);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
57
70.37%
2
20.00%
Marcel Holtmann
14
17.28%
4
40.00%
Arnaldo Carvalho de Melo
7
8.64%
2
20.00%
Gustavo Fernando Padovan
2
2.47%
1
10.00%
Andrei Emeltchenko
1
1.23%
1
10.00%
Total
81
100.00%
10
100.00%



static int rfcomm_sock_debugfs_open(struct inode *inode, struct file *file)
{
	return single_open(file, rfcomm_sock_debugfs_show, inode->i_private);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
24
85.71%
2
50.00%
Maksim Krasnyanskiy
4
14.29%
2
50.00%
Total
28
100.00%
4
100.00%


static const struct file_operations rfcomm_sock_debugfs_fops = {
	.open		= rfcomm_sock_debugfs_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};


static struct dentry *rfcomm_sock_debugfs;


static const struct proto_ops rfcomm_sock_ops = {
	.family		= PF_BLUETOOTH,
	.owner		= THIS_MODULE,
	.release	= rfcomm_sock_release,
	.bind		= rfcomm_sock_bind,
	.connect	= rfcomm_sock_connect,
	.listen		= rfcomm_sock_listen,
	.accept		= rfcomm_sock_accept,
	.getname	= rfcomm_sock_getname,
	.sendmsg	= rfcomm_sock_sendmsg,
	.recvmsg	= rfcomm_sock_recvmsg,
	.shutdown	= rfcomm_sock_shutdown,
	.setsockopt	= rfcomm_sock_setsockopt,
	.getsockopt	= rfcomm_sock_getsockopt,
	.ioctl		= rfcomm_sock_ioctl,
	.poll		= bt_sock_poll,
	.socketpair	= sock_no_socketpair,
	.mmap		= sock_no_mmap
};


static const struct net_proto_family rfcomm_sock_family_ops = {
	.family		= PF_BLUETOOTH,
	.owner		= THIS_MODULE,
	.create		= rfcomm_sock_create
};



int __init rfcomm_init_sockets(void)
{
	int err;

	BUILD_BUG_ON(sizeof(struct sockaddr_rc) > sizeof(struct sockaddr));

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

	err = bt_sock_register(BTPROTO_RFCOMM, &rfcomm_sock_family_ops);
	if (err < 0) {
		BT_ERR("RFCOMM socket layer registration failed");
		goto error;
	}

	err = bt_procfs_init(&init_net, "rfcomm", &rfcomm_sk_list, NULL);
	if (err < 0) {
		BT_ERR("Failed to create RFCOMM proc file");
		bt_sock_unregister(BTPROTO_RFCOMM);
		goto error;
	}

	BT_INFO("RFCOMM socket layer initialized");

	if (IS_ERR_OR_NULL(bt_debugfs))
		return 0;

	rfcomm_sock_debugfs = debugfs_create_file("rfcomm", 0444,
						  bt_debugfs, NULL,
						  &rfcomm_sock_debugfs_fops);

	return 0;

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

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marcel Holtmann
46
30.26%
5
50.00%
Masatake YAMATO
43
28.29%
1
10.00%
Arnaldo Carvalho de Melo
36
23.68%
1
10.00%
Maksim Krasnyanskiy
27
17.76%
3
30.00%
Total
152
100.00%
10
100.00%



void __exit rfcomm_cleanup_sockets(void)
{
	bt_procfs_cleanup(&init_net, "rfcomm");

	debugfs_remove(rfcomm_sock_debugfs);

	bt_sock_unregister(BTPROTO_RFCOMM);

	proto_unregister(&rfcomm_proto);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
14
43.75%
3
37.50%
Masatake YAMATO
8
25.00%
1
12.50%
Arnaldo Carvalho de Melo
5
15.62%
1
12.50%
Marcel Holtmann
4
12.50%
2
25.00%
Gustavo Fernando Padovan
1
3.12%
1
12.50%
Total
32
100.00%
8
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Maksim Krasnyanskiy
2714
56.32%
6
6.52%
Marcel Holtmann
1430
29.67%
25
27.17%
Arnaldo Carvalho de Melo
144
2.99%
6
6.52%
Gustavo Fernando Padovan
97
2.01%
8
8.70%
Jaganath Kanakkassery
59
1.22%
1
1.09%
Masatake YAMATO
51
1.06%
1
1.09%
Johan Hedberg
46
0.95%
3
3.26%
Peter Hurley
42
0.87%
2
2.17%
Eric W. Biedermann
25
0.52%
2
2.17%
Thomas Graf
25
0.52%
1
1.09%
Andrzej Kaczmarek
23
0.48%
1
1.09%
Mathias Krause
19
0.39%
2
2.17%
Filip Palian
13
0.27%
1
1.09%
Mat Martineau
12
0.25%
1
1.09%
Victor Shcherbatyuk
12
0.25%
1
1.09%
Al Viro
10
0.21%
4
4.35%
Vladimir Davydov
9
0.19%
1
1.09%
Andrew Morton
9
0.19%
2
2.17%
Eric Dumazet
8
0.17%
2
2.17%
Luiz Augusto von Dentz
8
0.17%
1
1.09%
David S. Miller
8
0.17%
4
4.35%
Octavian Purdila
7
0.15%
1
1.09%
Paul Moore
7
0.15%
1
1.09%
Changli Gao
6
0.12%
1
1.09%
Stephen Hemminger
6
0.12%
2
2.17%
Hideaki Yoshifuji / 吉藤英明
5
0.10%
2
2.17%
Robert P. J. Day
4
0.08%
1
1.09%
David Howells
3
0.06%
1
1.09%
Stephen Boyd
3
0.06%
1
1.09%
Ingo Molnar
3
0.06%
1
1.09%
Eric Paris
3
0.06%
1
1.09%
James Morris
2
0.04%
1
1.09%
Art Haas
2
0.04%
1
1.09%
Sasha Levin
2
0.04%
1
1.09%
Andrei Emeltchenko
1
0.02%
1
1.09%
Adrian Bunk
1
0.02%
1
1.09%
Total
4819
100.00%
92
100.00%
Directory: net/bluetooth/rfcomm

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