cregit-Linux how code gets into the kernel

Release 4.11 net/bluetooth/l2cap_sock.c

Directory: net/bluetooth
/*
   BlueZ - Bluetooth protocol stack for Linux
   Copyright (C) 2000-2001 Qualcomm Incorporated
   Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org>
   Copyright (C) 2010 Google Inc.
   Copyright (C) 2011 ProFUSION Embedded Systems

   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>

   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.
*/

/* Bluetooth L2CAP sockets. */

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

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

#include "smp.h"


static struct bt_sock_list l2cap_sk_list = {
	.lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock)
};


static const struct proto_ops l2cap_sock_ops;
static void l2cap_sock_init(struct sock *sk, struct sock *parent);
static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock,
				     int proto, gfp_t prio, int kern);




bool l2cap_is_socket(struct socket *sock)
{
	return sock && sock->ops == &l2cap_sock_ops;
}

Contributors
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David Herrmann20100.00%1100.00%


Total20100.00%1100.00%




EXPORT_SYMBOL(l2cap_is_socket);




static int l2cap_validate_bredr_psm(u16 psm)
{
	/* PSM must be odd and lsb of upper byte must be 0 */
	if ((psm & 0x0101) != 0x0001)
		return -EINVAL;

	/* Restrict usage of well-known PSMs */
	if (psm < L2CAP_PSM_DYN_START && !capable(CAP_NET_BIND_SERVICE))
		return -EACCES;

	return 0;
}


Contributors
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Johan Hedberg44100.00%2100.00%


Total44100.00%2100.00%






static int l2cap_validate_le_psm(u16 psm)
{
	/* Valid LE_PSM ranges are defined only until 0x00ff */
	if (psm > L2CAP_PSM_LE_DYN_END)
		return -EINVAL;

	/* Restrict fixed, SIG assigned PSM values to CAP_NET_BIND_SERVICE */
	if (psm < L2CAP_PSM_LE_DYN_START && !capable(CAP_NET_BIND_SERVICE))
		return -EACCES;

	return 0;
}


Contributors
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Johan Hedberg40100.00%2100.00%


Total40100.00%2100.00%






static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
{
	struct sock *sk = sock->sk;
	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
	struct sockaddr_l2 la;
	int len, err = 0;

	BT_DBG("sk %p", sk);

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

	memset(&la, 0, sizeof(la));
	len = min_t(unsigned int, sizeof(la), alen);
	memcpy(&la, addr, len);

	if (la.l2_cid && la.l2_psm)
		return -EINVAL;

	if (!bdaddr_type_is_valid(la.l2_bdaddr_type))
		return -EINVAL;

	if (bdaddr_type_is_le(la.l2_bdaddr_type)) {
		/* We only allow ATT user space socket */
		if (la.l2_cid &&
		    la.l2_cid != cpu_to_le16(L2CAP_CID_ATT))
			return -EINVAL;
	}

	lock_sock(sk);

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

	if (la.l2_psm) {
		__u16 psm = __le16_to_cpu(la.l2_psm);

		if (la.l2_bdaddr_type == BDADDR_BREDR)
			err = l2cap_validate_bredr_psm(psm);
		else
			err = l2cap_validate_le_psm(psm);

		if (err)
			goto done;
	}

	bacpy(&chan->src, &la.l2_bdaddr);
	chan->src_type = la.l2_bdaddr_type;

	if (la.l2_cid)
		err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid));
	else
		err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm);

	if (err < 0)
		goto done;

	switch (chan->chan_type) {
	case L2CAP_CHAN_CONN_LESS:
		if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_3DSP)
			chan->sec_level = BT_SECURITY_SDP;
		break;
	case L2CAP_CHAN_CONN_ORIENTED:
		if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_SDP ||
		    __le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM)
			chan->sec_level = BT_SECURITY_SDP;
		break;
	case L2CAP_CHAN_RAW:
		chan->sec_level = BT_SECURITY_SDP;
		break;
	case L2CAP_CHAN_FIXED:
		/* Fixed channels default to the L2CAP core not holding a
                 * hci_conn reference for them. For fixed channels mapping to
                 * L2CAP sockets we do want to hold a reference so set the
                 * appropriate flag to request it.
                 */
		set_bit(FLAG_HOLD_HCI_CONN, &chan->flags);
		break;
	}

	if (chan->psm && bdaddr_type_is_le(chan->src_type))
		chan->mode = L2CAP_MODE_LE_FLOWCTL;

	chan->state = BT_BOUND;
	sk->sk_state = BT_BOUND;

done:
	release_sock(sk);
	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan25860.14%419.05%


Johan Hedberg12428.90%942.86%


Marcel Holtmann378.62%419.05%


Ville Tervo40.93%14.76%


Santosh Nayak30.70%14.76%


Andrei Emeltchenko20.47%14.76%


Joe Perches10.23%14.76%


Total429100.00%21100.00%






static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr,
			      int alen, int flags)
{
	struct sock *sk = sock->sk;
	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
	struct sockaddr_l2 la;
	int len, err = 0;

	BT_DBG("sk %p", sk);

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

	memset(&la, 0, sizeof(la));
	len = min_t(unsigned int, sizeof(la), alen);
	memcpy(&la, addr, len);

	if (la.l2_cid && la.l2_psm)
		return -EINVAL;

	if (!bdaddr_type_is_valid(la.l2_bdaddr_type))
		return -EINVAL;

	/* Check that the socket wasn't bound to something that
         * conflicts with the address given to connect(). If chan->src
         * is BDADDR_ANY it means bind() was never used, in which case
         * chan->src_type and la.l2_bdaddr_type do not need to match.
         */
	if (chan->src_type == BDADDR_BREDR && bacmp(&chan->src, BDADDR_ANY) &&
	    bdaddr_type_is_le(la.l2_bdaddr_type)) {
		/* Old user space versions will try to incorrectly bind
                 * the ATT socket using BDADDR_BREDR. We need to accept
                 * this and fix up the source address type only when
                 * both the source CID and destination CID indicate
                 * ATT. Anything else is an invalid combination.
                 */
		if (chan->scid != L2CAP_CID_ATT ||
		    la.l2_cid != cpu_to_le16(L2CAP_CID_ATT))
			return -EINVAL;

		/* We don't have the hdev available here to make a
                 * better decision on random vs public, but since all
                 * user space versions that exhibit this issue anyway do
                 * not support random local addresses assuming public
                 * here is good enough.
                 */
		chan->src_type = BDADDR_LE_PUBLIC;
	}

	if (chan->src_type != BDADDR_BREDR && la.l2_bdaddr_type == BDADDR_BREDR)
		return -EINVAL;

	if (bdaddr_type_is_le(la.l2_bdaddr_type)) {
		/* We only allow ATT user space socket */
		if (la.l2_cid &&
		    la.l2_cid != cpu_to_le16(L2CAP_CID_ATT))
			return -EINVAL;
	}

	if (chan->psm && bdaddr_type_is_le(chan->src_type))
		chan->mode = L2CAP_MODE_LE_FLOWCTL;

	err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid),
				 &la.l2_bdaddr, la.l2_bdaddr_type);
	if (err)
		return err;

	lock_sock(sk);

	err = bt_sock_wait_state(sk, BT_CONNECTED,
				 sock_sndtimeo(sk, flags & O_NONBLOCK));

	release_sock(sk);

	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan17652.23%317.65%


Johan Hedberg13540.06%741.18%


Andrei Emeltchenko82.37%211.76%


Ville Tervo72.08%15.88%


Andre Guedes41.19%15.88%


Santosh Nayak30.89%15.88%


Marcel Holtmann20.59%15.88%


Joe Perches20.59%15.88%


Total337100.00%17100.00%






static int l2cap_sock_listen(struct socket *sock, int backlog)
{
	struct sock *sk = sock->sk;
	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
	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_SEQPACKET && sk->sk_type != SOCK_STREAM) {
		err = -EINVAL;
		goto done;
	}

	switch (chan->mode) {
	case L2CAP_MODE_BASIC:
	case L2CAP_MODE_LE_FLOWCTL:
		break;
	case L2CAP_MODE_ERTM:
	case L2CAP_MODE_STREAMING:
		if (!disable_ertm)
			break;
		/* fall through */
	default:
		err = -EOPNOTSUPP;
		goto done;
	}

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

	/* Listening channels need to use nested locking in order not to
         * cause lockdep warnings when the created child channels end up
         * being locked in the same thread as the parent channel.
         */
	atomic_set(&chan->nesting, L2CAP_NESTING_PARENT);

	chan->state = BT_LISTEN;
	sk->sk_state = BT_LISTEN;

done:
	release_sock(sk);
	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan14078.65%342.86%


Marcel Holtmann2312.92%114.29%


Johan Hedberg158.43%342.86%


Total178100.00%7100.00%






static int l2cap_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, L2CAP_NESTING_PARENT);

	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, L2CAP_NESTING_PARENT);
	}
	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
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan17178.08%120.00%


Peter Hurley4319.63%240.00%


David Howells31.37%120.00%


Johan Hedberg20.91%120.00%


Total219100.00%5100.00%






static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr,
			      int *len, int peer)
{
	struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr;
	struct sock *sk = sock->sk;
	struct l2cap_chan *chan = l2cap_pi(sk)->chan;

	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 &&
	    sk->sk_state != BT_CONFIG)
		return -ENOTCONN;

	memset(la, 0, sizeof(struct sockaddr_l2));
	addr->sa_family = AF_BLUETOOTH;
	*len = sizeof(struct sockaddr_l2);

	la->l2_psm = chan->psm;

	if (peer) {
		bacpy(&la->l2_bdaddr, &chan->dst);
		la->l2_cid = cpu_to_le16(chan->dcid);
		la->l2_bdaddr_type = chan->dst_type;
	} else {
		bacpy(&la->l2_bdaddr, &chan->src);
		la->l2_cid = cpu_to_le16(chan->scid);
		la->l2_bdaddr_type = chan->src_type;
	}

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan14167.46%330.00%


Johan Hedberg3717.70%440.00%


Marcel Holtmann188.61%220.00%


Mathias Krause136.22%110.00%


Total209100.00%10100.00%






static int l2cap_sock_getsockopt_old(struct socket *sock, int optname,
				     char __user *optval, int __user *optlen)
{
	struct sock *sk = sock->sk;
	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
	struct l2cap_options opts;
	struct l2cap_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 L2CAP_OPTIONS:
		/* LE sockets should use BT_SNDMTU/BT_RCVMTU, but since
                 * legacy ATT code depends on getsockopt for
                 * L2CAP_OPTIONS we need to let this pass.
                 */
		if (bdaddr_type_is_le(chan->src_type) &&
		    chan->scid != L2CAP_CID_ATT) {
			err = -EINVAL;
			break;
		}

		memset(&opts, 0, sizeof(opts));
		opts.imtu     = chan->imtu;
		opts.omtu     = chan->omtu;
		opts.flush_to = chan->flush_to;
		opts.mode     = chan->mode;
		opts.fcs      = chan->fcs;
		opts.max_tx   = chan->max_tx;
		opts.txwin_size = chan->tx_win;

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

		break;

	case L2CAP_LM:
		switch (chan->sec_level) {
		case BT_SECURITY_LOW:
			opt = L2CAP_LM_AUTH;
			break;
		case BT_SECURITY_MEDIUM:
			opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT;
			break;
		case BT_SECURITY_HIGH:
			opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT |
			      L2CAP_LM_SECURE;
			break;
		case BT_SECURITY_FIPS:
			opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT |
			      L2CAP_LM_SECURE | L2CAP_LM_FIPS;
			break;
		default:
			opt = 0;
			break;
		}

		if (test_bit(FLAG_ROLE_SWITCH, &chan->flags))
			opt |= L2CAP_LM_MASTER;

		if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags))
			opt |= L2CAP_LM_RELIABLE;

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

		break;

	case L2CAP_CONNINFO:
		if (sk->sk_state != BT_CONNECTED &&
		    !(sk->sk_state == BT_CONNECT2 &&
		      test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
			err = -ENOTCONN;
			break;
		}

		memset(&cinfo, 0, sizeof(cinfo));
		cinfo.hci_handle = chan->conn->hcon->handle;
		memcpy(cinfo.dev_class, chan->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
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan38983.30%650.00%


Johan Hedberg245.14%18.33%


Marcel Holtmann143.00%18.33%


Andrei Emeltchenko143.00%216.67%


Filip Palian132.78%18.33%


Vasiliy Kulikov132.78%18.33%


Total467100.00%12100.00%






static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname,
				 char __user *optval, int __user *optlen)
{
	struct sock *sk = sock->sk;
	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
	struct bt_security sec;
	struct bt_power pwr;
	int len, err = 0;

	BT_DBG("sk %p", sk);

	if (level == SOL_L2CAP)
		return l2cap_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 (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED &&
		    chan->chan_type != L2CAP_CHAN_FIXED &&
		    chan->chan_type != L2CAP_CHAN_RAW) {
			err = -EINVAL;
			break;
		}

		memset(&sec, 0, sizeof(sec));
		if (chan->conn) {
			sec.level = chan->conn->hcon->sec_level;

			if (sk->sk_state == BT_CONNECTED)
				sec.key_size = chan->conn->hcon->enc_key_size;
		} else {
			sec.level = chan->sec_level;
		}

		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;

	case BT_FLUSHABLE:
		if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags),
			     (u32 __user *) optval))
			err = -EFAULT;

		break;

	case BT_POWER:
		if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM
		    && sk->sk_type != SOCK_RAW) {
			err = -EINVAL;
			break;
		}

		pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags);

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

		break;

	case BT_CHANNEL_POLICY:
		if (put_user(chan->chan_policy, (u32 __user *) optval))
			err = -EFAULT;
		break;

	case BT_SNDMTU:
		if (!bdaddr_type_is_le(chan->src_type)) {
			err = -EINVAL;
			break;
		}

		if (sk->sk_state != BT_CONNECTED) {
			err = -ENOTCONN;
			break;
		}

		if (put_user(chan->omtu, (u16 __user *) optval))
			err = -EFAULT;
		break;

	case BT_RCVMTU:
		if (!bdaddr_type_is_le(chan->src_type)) {
			err = -EINVAL;
			break;
		}

		if (put_user(chan->imtu, (u16 __user *) optval))
			err = -EFAULT;
		break;

	default:
		err = -ENOPROTOOPT;
		break;
	}

	release_sock(sk);
	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan28951.89%538.46%


Johan Hedberg10819.39%215.38%


Jaikumar Ganesh7513.46%17.69%


Vinicius Costa Gomes335.92%17.69%


Andrei Emeltchenko274.85%323.08%


Mat Martineau254.49%17.69%


Total557100.00%13100.00%






static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu)
{
	switch (chan->scid) {
	case L2CAP_CID_ATT:
		if (mtu < L2CAP_LE_MIN_MTU)
			return false;
		break;

	default:
		if (mtu < L2CAP_DEFAULT_MIN_MTU)
			return false;
	}

	return true;
}


Contributors
PersonTokensPropCommitsCommitProp
Andre Guedes4797.92%266.67%


Johan Hedberg12.08%133.33%


Total48100.00%3100.00%






static int l2cap_sock_setsockopt_old(struct socket *sock, int optname,
				     char __user *optval, unsigned int optlen)
{
	struct sock *sk = sock->sk;
	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
	struct l2cap_options opts;
	int len, err = 0;
	u32 opt;

	BT_DBG("sk %p", sk);

	lock_sock(sk);

	switch (optname) {
	case L2CAP_OPTIONS:
		if (bdaddr_type_is_le(chan->src_type)) {
			err = -EINVAL;
			break;
		}

		if (sk->sk_state == BT_CONNECTED) {
			err = -EINVAL;
			break;
		}

		opts.imtu     = chan->imtu;
		opts.omtu     = chan->omtu;
		opts.flush_to = chan->flush_to;
		opts.mode     = chan->mode;
		opts.fcs      = chan->fcs;
		opts.max_tx   = chan->max_tx;
		opts.txwin_size = chan->tx_win;

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

		if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) {
			err = -EINVAL;
			break;
		}

		if (!l2cap_valid_mtu(chan, opts.imtu)) {
			err = -EINVAL;
			break;
		}

		chan->mode = opts.mode;
		switch (chan->mode) {
		case L2CAP_MODE_LE_FLOWCTL:
			break;
		case L2CAP_MODE_BASIC:
			clear_bit(CONF_STATE2_DEVICE, &chan->conf_state);
			break;
		case L2CAP_MODE_ERTM:
		case L2CAP_MODE_STREAMING:
			if (!disable_ertm)
				break;
			/* fall through */
		default:
			err = -EINVAL;
			break;
		}

		chan->imtu = opts.imtu;
		chan->omtu = opts.omtu;
		chan->fcs  = opts.fcs;
		chan->max_tx = opts.max_tx;
		chan->tx_win = opts.txwin_size;
		chan->flush_to = opts.flush_to;
		break;

	case L2CAP_LM:
		if (get_user(opt, (u32 __user *) optval)) {
			err = -EFAULT;
			break;
		}

		if (opt & L2CAP_LM_FIPS) {
			err = -EINVAL;
			break;
		}

		if (opt & L2CAP_LM_AUTH)
			chan->sec_level = BT_SECURITY_LOW;
		if (opt & L2CAP_LM_ENCRYPT)
			chan->sec_level = BT_SECURITY_MEDIUM;
		if (opt & L2CAP_LM_SECURE)
			chan->sec_level = BT_SECURITY_HIGH;

		if (opt & L2CAP_LM_MASTER)
			set_bit(FLAG_ROLE_SWITCH, &chan->flags);
		else
			clear_bit(FLAG_ROLE_SWITCH, &chan->flags);

		if (opt & L2CAP_LM_RELIABLE)
			set_bit(FLAG_FORCE_RELIABLE, &chan->flags);
		else
			clear_bit(FLAG_FORCE_RELIABLE, &chan->flags);
		break;

	default:
		err = -ENOPROTOOPT;
		break;
	}

	release_sock(sk);
	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan38078.03%642.86%


Andrei Emeltchenko5210.68%428.57%


Johan Hedberg214.31%214.29%


Andre Guedes204.11%17.14%


Marcel Holtmann142.87%17.14%


Total487100.00%14100.00%






static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname,
				 char __user *optval, unsigned int optlen)
{
	struct sock *sk = sock->sk;
	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
	struct bt_security sec;
	struct bt_power pwr;
	struct l2cap_conn *conn;
	int len, err = 0;
	u32 opt;

	BT_DBG("sk %p", sk);

	if (level == SOL_L2CAP)
		return l2cap_sock_setsockopt_old(sock, optname, optval, optlen);

	if (level != SOL_BLUETOOTH)
		return -ENOPROTOOPT;

	lock_sock(sk);

	switch (optname) {
	case BT_SECURITY:
		if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED &&
		    chan->chan_type != L2CAP_CHAN_FIXED &&
		    chan->chan_type != L2CAP_CHAN_RAW) {
			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_LOW ||
		    sec.level > BT_SECURITY_FIPS) {
			err = -EINVAL;
			break;
		}

		chan->sec_level = sec.level;

		if (!chan->conn)
			break;

		conn = chan->conn;

		/*change security for LE channels */
		if (chan->scid == L2CAP_CID_ATT) {
			if (smp_conn_security(conn->hcon, sec.level))
				break;
			set_bit(FLAG_PENDING_SECURITY, &chan->flags);
			sk->sk_state = BT_CONFIG;
			chan->state = BT_CONFIG;

		/* or for ACL link */
		} else if ((sk->sk_state == BT_CONNECT2 &&
			    test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) ||
			   sk->sk_state == BT_CONNECTED) {
			if (!l2cap_chan_check_security(chan, true))
				set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags);
			else
				sk->sk_state_change(sk);
		} else {
			err = -EINVAL;
		}
		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);
			set_bit(FLAG_DEFER_SETUP, &chan->flags);
		} else {
			clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
			clear_bit(FLAG_DEFER_SETUP, &chan->flags);
		}
		break;

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

		if (opt > BT_FLUSHABLE_ON) {
			err = -EINVAL;
			break;
		}

		if (opt == BT_FLUSHABLE_OFF) {
			conn = chan->conn;
			/* proceed further only when we have l2cap_conn and
                           No Flush support in the LM */
			if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) {
				err = -EINVAL;
				break;
			}
		}

		if (opt)
			set_bit(FLAG_FLUSHABLE, &chan->flags);
		else
			clear_bit(FLAG_FLUSHABLE, &chan->flags);
		break;

	case BT_POWER:
		if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED &&
		    chan->chan_type != L2CAP_CHAN_RAW) {
			err = -EINVAL;
			break;
		}

		pwr.force_active = BT_POWER_FORCE_ACTIVE_ON;

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

		if (pwr.force_active)
			set_bit(FLAG_FORCE_ACTIVE, &chan->flags);
		else
			clear_bit(FLAG_FORCE_ACTIVE, &chan->flags);
		break;

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

		if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) {
			err = -EINVAL;
			break;
		}

		if (chan->mode != L2CAP_MODE_ERTM &&
		    chan->mode != L2CAP_MODE_STREAMING) {
			err = -EOPNOTSUPP;
			break;
		}

		chan->chan_policy = (u8) opt;

		if (sk->sk_state == BT_CONNECTED &&
		    chan->move_role == L2CAP_MOVE_ROLE_NONE)
			l2cap_move_start(chan);

		break;

	case BT_SNDMTU:
		if (!bdaddr_type_is_le(chan->src_type)) {
			err = -EINVAL;
			break;
		}

		/* Setting is not supported as it's the remote side that
                 * decides this.
                 */
		err = -EPERM;
		break;

	case BT_RCVMTU:
		if (!bdaddr_type_is_le(chan->src_type)) {
			err = -EINVAL;
			break;
		}

		if (sk->sk_state == BT_CONNECTED) {
			err = -EISCONN;
			break;
		}

		if (get_user(opt, (u16 __user *) optval)) {
			err = -EFAULT;
			break;
		}

		chan->imtu = opt;
		break;

	default:
		err = -ENOPROTOOPT;
		break;
	}

	release_sock(sk);
	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan46054.05%832.00%


Johan Hedberg11213.16%520.00%


Mat Martineau8810.34%28.00%


Jaikumar Ganesh779.05%14.00%


Andrei Emeltchenko455.29%28.00%


Vinicius Costa Gomes404.70%28.00%


Marcel Holtmann242.82%14.00%


Johannes Berg20.24%14.00%


Patrik Flykt10.12%14.00%


Lucas De Marchi10.12%14.00%


Amadeusz Sławiński10.12%14.00%


Total851100.00%25100.00%






static int l2cap_sock_sendmsg(struct socket *sock, struct msghdr *msg,
			      size_t len)
{
	struct sock *sk = sock->sk;
	struct l2cap_chan *chan = l2cap_pi(sk)->chan;
	int err;

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

	err = sock_error(sk);
	if (err)
		return err;

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

	if (sk->sk_state != BT_CONNECTED)
		return -ENOTCONN;

	lock_sock(sk);
	err = bt_sock_wait_ready(sk, msg->msg_flags);
	release_sock(sk);
	if (err)
		return err;

	l2cap_chan_lock(chan);
	err = l2cap_chan_send(chan, msg, len);
	l2cap_chan_unlock(chan);

	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan10775.35%466.67%


Johan Hedberg2819.72%116.67%


Mat Martineau74.93%116.67%


Total142100.00%6100.00%






static int l2cap_sock_recvmsg(struct socket *sock, struct msghdr *msg,
			      size_t len, int flags)
{
	struct sock *sk = sock->sk;
	struct l2cap_pinfo *pi = l2cap_pi(sk);
	int err;

	lock_sock(sk);

	if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP,
						    &bt_sk(sk)->flags)) {
		if (bdaddr_type_is_le(pi->chan->src_type)) {
			sk->sk_state = BT_CONNECTED;
			pi->chan->state = BT_CONNECTED;
			__l2cap_le_connect_rsp_defer(pi->chan);
		} else {
			sk->sk_state = BT_CONFIG;
			pi->chan->state = BT_CONFIG;
			__l2cap_connect_rsp_defer(pi->chan);
		}

		err = 0;
		goto done;
	}

	release_sock(sk);

	if (sock->type == SOCK_STREAM)
		err = bt_sock_stream_recvmsg(sock, msg, len, flags);
	else
		err = bt_sock_recvmsg(sock, msg, len, flags);

	if (pi->chan->mode != L2CAP_MODE_ERTM)
		return err;

	/* Attempt to put pending rx data in the socket buffer */

	lock_sock(sk);

	if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state))
		goto done;

	if (pi->rx_busy_skb) {
		if (!__sock_queue_rcv_skb(sk, pi->rx_busy_skb))
			pi->rx_busy_skb = NULL;
		else
			goto done;
	}

	/* Restore data flow when half of the receive buffer is
         * available.  This avoids resending large numbers of
         * frames.
         */
	if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1)
		l2cap_chan_busy(pi->chan, 0);

done:
	release_sock(sk);
	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
Mat Martineau12243.57%111.11%


Gustavo Fernando Padovan11440.71%555.56%


Johan Hedberg4315.36%222.22%


Daniel Borkmann10.36%111.11%


Total280100.00%9100.00%



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



static void l2cap_sock_kill(struct sock *sk)
{
	if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
		return;

	BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state));

	/* Kill poor orphan */

	l2cap_chan_put(l2cap_pi(sk)->chan);
	sock_set_flag(sk, SOCK_DEAD);
	sock_put(sk);
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan5892.06%360.00%


Andrei Emeltchenko46.35%120.00%


Jaganath Kanakkassery11.59%120.00%


Total63100.00%5100.00%






static int __l2cap_wait_ack(struct sock *sk, struct l2cap_chan *chan)
{
	DECLARE_WAITQUEUE(wait, current);
	int err = 0;
	int timeo = L2CAP_WAIT_ACK_POLL_PERIOD;
	/* Timeout to prevent infinite loop */
	unsigned long timeout = jiffies + L2CAP_WAIT_ACK_TIMEOUT;

	add_wait_queue(sk_sleep(sk), &wait);
	set_current_state(TASK_INTERRUPTIBLE);
	do {
		BT_DBG("Waiting for %d ACKs, timeout %04d ms",
		       chan->unacked_frames, time_after(jiffies, timeout) ? 0 :
		       jiffies_to_msecs(timeout - jiffies));

		if (!timeo)
			timeo = L2CAP_WAIT_ACK_POLL_PERIOD;

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

		release_sock(sk);
		timeo = schedule_timeout(timeo);
		lock_sock(sk);
		set_current_state(TASK_INTERRUPTIBLE);

		err = sock_error(sk);
		if (err)
			break;

		if (time_after(jiffies, timeout)) {
			err = -ENOLINK;
			break;
		}

	} while (chan->unacked_frames > 0 &&
		 chan->state == BT_CONNECTED);

	set_current_state(TASK_RUNNING);
	remove_wait_queue(sk_sleep(sk), &wait);
	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan12563.45%120.00%


Dean Jenkins7236.55%480.00%


Total197100.00%5100.00%






static int l2cap_sock_shutdown(struct socket *sock, int how)
{
	struct sock *sk = sock->sk;
	struct l2cap_chan *chan;
	struct l2cap_conn *conn;
	int err = 0;

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

	if (!sk)
		return 0;

	lock_sock(sk);

	if (sk->sk_shutdown)
		goto shutdown_already;

	BT_DBG("Handling sock shutdown");

	/* prevent sk structure from being freed whilst unlocked */
	sock_hold(sk);

	chan = l2cap_pi(sk)->chan;
	/* prevent chan structure from being freed whilst unlocked */
	l2cap_chan_hold(chan);

	BT_DBG("chan %p state %s", chan, state_to_string(chan->state));

	if (chan->mode == L2CAP_MODE_ERTM &&
	    chan->unacked_frames > 0 &&
	    chan->state == BT_CONNECTED) {
		err = __l2cap_wait_ack(sk, chan);

		/* After waiting for ACKs, check whether shutdown
                 * has already been actioned to close the L2CAP
                 * link such as by l2cap_disconnection_req().
                 */
		if (sk->sk_shutdown)
			goto has_shutdown;
	}

	sk->sk_shutdown = SHUTDOWN_MASK;
	release_sock(sk);

	l2cap_chan_lock(chan);
	conn = chan->conn;
	if (conn)
		/* prevent conn structure from being freed */
		l2cap_conn_get(conn);
	l2cap_chan_unlock(chan);

	if (conn)
		/* mutex lock must be taken before l2cap_chan_lock() */
		mutex_lock(&conn->chan_lock);

	l2cap_chan_lock(chan);
	l2cap_chan_close(chan, 0);
	l2cap_chan_unlock(chan);

	if (conn) {
		mutex_unlock(&conn->chan_lock);
		l2cap_conn_put(conn);
	}

	lock_sock(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);

has_shutdown:
	l2cap_chan_put(chan);
	sock_put(sk);

shutdown_already:
	if (!err && sk->sk_err)
		err = -sk->sk_err;

	release_sock(sk);

	BT_DBG("Sock shutdown complete err: %d", err);

	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
Dean Jenkins14645.48%640.00%


Gustavo Fernando Padovan12639.25%426.67%


Andrei Emeltchenko268.10%320.00%


Johan Hedberg144.36%16.67%


Vladimir Davydov92.80%16.67%


Total321100.00%15100.00%






static int l2cap_sock_release(struct socket *sock)
{
	struct sock *sk = sock->sk;
	int err;

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

	if (!sk)
		return 0;

	bt_sock_unlink(&l2cap_sk_list, sk);

	err = l2cap_sock_shutdown(sock, 2);

	sock_orphan(sk);
	l2cap_sock_kill(sk);
	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan6288.57%150.00%


Masatake YAMATO811.43%150.00%


Total70100.00%2100.00%






static void l2cap_sock_cleanup_listen(struct sock *parent)
{
	struct sock *sk;

	BT_DBG("parent %p state %s", parent,
	       state_to_string(parent->sk_state));

	/* Close not yet accepted channels */
	while ((sk = bt_accept_dequeue(parent, NULL))) {
		struct l2cap_chan *chan = l2cap_pi(sk)->chan;

		BT_DBG("child chan %p state %s", chan,
		       state_to_string(chan->state));

		l2cap_chan_lock(chan);
		__clear_chan_timer(chan);
		l2cap_chan_close(chan, ECONNRESET);
		l2cap_chan_unlock(chan);

		l2cap_sock_kill(sk);
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Andrei Emeltchenko7777.78%150.00%


Johan Hedberg2222.22%150.00%


Total99100.00%2100.00%






static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan)
{
	struct sock *sk, *parent = chan->data;

	lock_sock(parent);

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

	sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP,
			      GFP_ATOMIC, 0);
	if (!sk) {
		release_sock(parent);
		return NULL;
        }

	bt_sock_reclassify_lock(sk, BTPROTO_L2CAP);

	l2cap_sock_init(sk, parent);

	bt_accept_enqueue(parent, sk);

	release_sock(parent);

	return l2cap_pi(sk)->chan;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan10383.06%562.50%


Jukka Taimisto129.68%112.50%


Octavian Purdila75.65%112.50%


Eric W. Biedermann21.61%112.50%


Total124100.00%8100.00%






static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb)
{
	struct sock *sk = chan->data;
	int err;

	lock_sock(sk);

	if (l2cap_pi(sk)->rx_busy_skb) {
		err = -ENOMEM;
		goto done;
	}

	if (chan->mode != L2CAP_MODE_ERTM &&
	    chan->mode != L2CAP_MODE_STREAMING) {
		/* Even if no filter is attached, we could potentially
                 * get errors from security modules, etc.
                 */
		err = sk_filter(sk, skb);
		if (err)
			goto done;
	}

	err = __sock_queue_rcv_skb(sk, skb);

	/* For ERTM, handle one skb that doesn't fit into the recv
         * buffer.  This is important to do because the data frames
         * have already been acked, so the skb cannot be discarded.
         *
         * Notify the l2cap core that the buffer is full, so the
         * LOCAL_BUSY state is entered and no more frames are
         * acked and reassembled until there is buffer space
         * available.
         */
	if (err < 0 && chan->mode == L2CAP_MODE_ERTM) {
		l2cap_pi(sk)->rx_busy_skb = skb;
		l2cap_chan_busy(chan, 1);
		err = 0;
	}

done:
	release_sock(sk);

	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
Mat Martineau4431.65%116.67%


Daniel Borkmann3424.46%116.67%


Gustavo Fernando Padovan3122.30%233.33%


Andrei Emeltchenko2014.39%116.67%


Marcel Holtmann107.19%116.67%


Total139100.00%6100.00%






static void l2cap_sock_close_cb(struct l2cap_chan *chan)
{
	struct sock *sk = chan->data;

	l2cap_sock_kill(sk);
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan25100.00%2100.00%


Total25100.00%2100.00%






static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err)
{
	struct sock *sk = chan->data;
	struct sock *parent;

	BT_DBG("chan %p state %s", chan, state_to_string(chan->state));

	/* This callback can be called both for server (BT_LISTEN)
         * sockets as well as "normal" ones. To avoid lockdep warnings
         * with child socket locking (through l2cap_sock_cleanup_listen)
         * we need separation into separate nesting levels. The simplest
         * way to accomplish this is to inherit the nesting level used
         * for the channel.
         */
	lock_sock_nested(sk, atomic_read(&chan->nesting));

	parent = bt_sk(sk)->parent;

	sock_set_flag(sk, SOCK_ZAPPED);

	switch (chan->state) {
	case BT_OPEN:
	case BT_BOUND:
	case BT_CLOSED:
		break;
	case BT_LISTEN:
		l2cap_sock_cleanup_listen(sk);
		sk->sk_state = BT_CLOSED;
		chan->state = BT_CLOSED;

		break;
	default:
		sk->sk_state = BT_CLOSED;
		chan->state = BT_CLOSED;

		sk->sk_err = err;

		if (parent) {
			bt_accept_unlink(sk);
			parent->sk_data_ready(parent);
		} else {
			sk->sk_state_change(sk);
		}

		break;
	}

	release_sock(sk);
}


Contributors
PersonTokensPropCommitsCommitProp
Andrei Emeltchenko14085.37%125.00%


Johan Hedberg2414.63%375.00%


Total164100.00%4100.00%






static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state,
				       int err)
{
	struct sock *sk = chan->data;

	sk->sk_state = state;

	if (err)
		sk->sk_err = err;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan42100.00%3100.00%


Total42100.00%3100.00%






static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan,
					       unsigned long hdr_len,
					       unsigned long len, int nb)
{
	struct sock *sk = chan->data;
	struct sk_buff *skb;
	int err;

	l2cap_chan_unlock(chan);
	skb = bt_skb_send_alloc(sk, hdr_len + len, nb, &err);
	l2cap_chan_lock(chan);

	if (!skb)
		return ERR_PTR(err);

	skb->priority = sk->sk_priority;

	bt_cb(skb)->l2cap.chan = chan;

	return skb;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan4040.00%337.50%


Andrei Emeltchenko3434.00%112.50%


Marcel Holtmann1414.00%225.00%


Mat Martineau1010.00%112.50%


Johan Hedberg22.00%112.50%


Total100100.00%8100.00%






static void l2cap_sock_ready_cb(struct l2cap_chan *chan)
{
	struct sock *sk = chan->data;
	struct sock *parent;

	lock_sock(sk);

	parent = bt_sk(sk)->parent;

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

	sk->sk_state = BT_CONNECTED;
	sk->sk_state_change(sk);

	if (parent)
		parent->sk_data_ready(parent);

	release_sock(sk);
}


Contributors
PersonTokensPropCommitsCommitProp
Andrei Emeltchenko77100.00%1100.00%


Total77100.00%1100.00%






static void l2cap_sock_defer_cb(struct l2cap_chan *chan)
{
	struct sock *parent, *sk = chan->data;

	lock_sock(sk);

	parent = bt_sk(sk)->parent;
	if (parent)
		parent->sk_data_ready(parent);

	release_sock(sk);
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan53100.00%2100.00%


Total53100.00%2100.00%






static void l2cap_sock_resume_cb(struct l2cap_chan *chan)
{
	struct sock *sk = chan->data;

	if (test_and_clear_bit(FLAG_PENDING_SECURITY, &chan->flags)) {
		sk->sk_state = BT_CONNECTED;
		chan->state = BT_CONNECTED;
	}

	clear_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags);
	sk->sk_state_change(sk);
}


Contributors
PersonTokensPropCommitsCommitProp
Marcel Holtmann4060.61%150.00%


Johan Hedberg2639.39%150.00%


Total66100.00%2100.00%






static void l2cap_sock_set_shutdown_cb(struct l2cap_chan *chan)
{
	struct sock *sk = chan->data;

	lock_sock(sk);
	sk->sk_shutdown = SHUTDOWN_MASK;
	release_sock(sk);
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan36100.00%1100.00%


Total36100.00%1100.00%






static long l2cap_sock_get_sndtimeo_cb(struct l2cap_chan *chan)
{
	struct sock *sk = chan->data;

	return sk->sk_sndtimeo;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan25100.00%1100.00%


Total25100.00%1100.00%






static void l2cap_sock_suspend_cb(struct l2cap_chan *chan)
{
	struct sock *sk = chan->data;

	set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags);
	sk->sk_state_change(sk);
}


Contributors
PersonTokensPropCommitsCommitProp
Johan Hedberg40100.00%1100.00%


Total40100.00%1100.00%




static const struct l2cap_ops l2cap_chan_ops = {
	.name			= "L2CAP Socket Interface",
	.new_connection		= l2cap_sock_new_connection_cb,
	.recv			= l2cap_sock_recv_cb,
	.close			= l2cap_sock_close_cb,
	.teardown		= l2cap_sock_teardown_cb,
	.state_change		= l2cap_sock_state_change_cb,
	.ready			= l2cap_sock_ready_cb,
	.defer			= l2cap_sock_defer_cb,
	.resume			= l2cap_sock_resume_cb,
	.suspend		= l2cap_sock_suspend_cb,
	.set_shutdown		= l2cap_sock_set_shutdown_cb,
	.get_sndtimeo		= l2cap_sock_get_sndtimeo_cb,
	.alloc_skb		= l2cap_sock_alloc_skb_cb,
};




static void l2cap_sock_destruct(struct sock *sk)
{
	BT_DBG("sk %p", sk);

	if (l2cap_pi(sk)->chan)
		l2cap_chan_put(l2cap_pi(sk)->chan);

	if (l2cap_pi(sk)->rx_busy_skb) {
		kfree_skb(l2cap_pi(sk)->rx_busy_skb);
		l2cap_pi(sk)->rx_busy_skb = NULL;
	}

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


Contributors
PersonTokensPropCommitsCommitProp
Mat Martineau4048.19%250.00%


Gustavo Fernando Padovan3440.96%125.00%


Sasha Levin910.84%125.00%


Total83100.00%4100.00%






static void l2cap_skb_msg_name(struct sk_buff *skb, void *msg_name,
			       int *msg_namelen)
{
	DECLARE_SOCKADDR(struct sockaddr_l2 *, la, msg_name);

	memset(la, 0, sizeof(struct sockaddr_l2));
	la->l2_family = AF_BLUETOOTH;
	la->l2_psm = bt_cb(skb)->l2cap.psm;
	bacpy(&la->l2_bdaddr, &bt_cb(skb)->l2cap.bdaddr);

	*msg_namelen = sizeof(struct sockaddr_l2);
}


Contributors
PersonTokensPropCommitsCommitProp
Marcel Holtmann7887.64%133.33%


Steffen Hurrle77.87%133.33%


Johan Hedberg44.49%133.33%


Total89100.00%3100.00%






static void l2cap_sock_init(struct sock *sk, struct sock *parent)
{
	struct l2cap_chan *chan = l2cap_pi(sk)->chan;

	BT_DBG("sk %p", sk);

	if (parent) {
		struct l2cap_chan *pchan = l2cap_pi(parent)->chan;

		sk->sk_type = parent->sk_type;
		bt_sk(sk)->flags = bt_sk(parent)->flags;

		chan->chan_type = pchan->chan_type;
		chan->imtu = pchan->imtu;
		chan->omtu = pchan->omtu;
		chan->conf_state = pchan->conf_state;
		chan->mode = pchan->mode;
		chan->fcs  = pchan->fcs;
		chan->max_tx = pchan->max_tx;
		chan->tx_win = pchan->tx_win;
		chan->tx_win_max = pchan->tx_win_max;
		chan->sec_level = pchan->sec_level;
		chan->flags = pchan->flags;
		chan->tx_credits = pchan->tx_credits;
		chan->rx_credits = pchan->rx_credits;

		if (chan->chan_type == L2CAP_CHAN_FIXED) {
			chan->scid = pchan->scid;
			chan->dcid = pchan->scid;
		}

		security_sk_clone(parent, sk);
	} else {
		switch (sk->sk_type) {
		case SOCK_RAW:
			chan->chan_type = L2CAP_CHAN_RAW;
			break;
		case SOCK_DGRAM:
			chan->chan_type = L2CAP_CHAN_CONN_LESS;
			bt_sk(sk)->skb_msg_name = l2cap_skb_msg_name;
			break;
		case SOCK_SEQPACKET:
		case SOCK_STREAM:
			chan->chan_type = L2CAP_CHAN_CONN_ORIENTED;
			break;
		}

		chan->imtu = L2CAP_DEFAULT_MTU;
		chan->omtu = 0;
		if (!disable_ertm && sk->sk_type == SOCK_STREAM) {
			chan->mode = L2CAP_MODE_ERTM;
			set_bit(CONF_STATE2_DEVICE, &chan->conf_state);
		} else {
			chan->mode = L2CAP_MODE_BASIC;
		}

		l2cap_chan_set_defaults(chan);
	}

	/* Default config options */
	chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;

	chan->data = sk;
	chan->ops = &l2cap_chan_ops;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan26678.24%947.37%


Johan Hedberg4212.35%210.53%


Marcel Holtmann113.24%210.53%


Andrei Emeltchenko72.06%421.05%


Paul Moore72.06%15.26%


Jaikumar Ganesh72.06%15.26%


Total340100.00%19100.00%




static struct proto l2cap_proto = {
	.name		= "L2CAP",
	.owner		= THIS_MODULE,
	.obj_size	= sizeof(struct l2cap_pinfo)
};




static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock,
				     int proto, gfp_t prio, int kern)
{
	struct sock *sk;
	struct l2cap_chan *chan;

	sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto, kern);
	if (!sk)
		return NULL;

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

	sk->sk_destruct = l2cap_sock_destruct;
	sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT;

	sock_reset_flag(sk, SOCK_ZAPPED);

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

	chan = l2cap_chan_create();
	if (!chan) {
		sk_free(sk);
		return NULL;
	}

	l2cap_chan_hold(chan);

	l2cap_pi(sk)->chan = chan;

	return sk;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan13692.52%457.14%


Eric W. Biedermann53.40%114.29%


Mat Martineau53.40%114.29%


Jaganath Kanakkassery10.68%114.29%


Total147100.00%7100.00%






static int l2cap_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_SEQPACKET && sock->type != SOCK_STREAM &&
	    sock->type != SOCK_DGRAM && sock->type != SOCK_RAW)
		return -ESOCKTNOSUPPORT;

	if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
		return -EPERM;

	sock->ops = &l2cap_sock_ops;

	sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
	if (!sk)
		return -ENOMEM;

	l2cap_sock_init(sk, NULL);
	bt_sock_link(&l2cap_sk_list, sk);
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan13092.86%133.33%


Masatake YAMATO85.71%133.33%


Eric W. Biedermann21.43%133.33%


Total140100.00%3100.00%




static const struct proto_ops l2cap_sock_ops = {
	.family		= PF_BLUETOOTH,
	.owner		= THIS_MODULE,
	.release	= l2cap_sock_release,
	.bind		= l2cap_sock_bind,
	.connect	= l2cap_sock_connect,
	.listen		= l2cap_sock_listen,
	.accept		= l2cap_sock_accept,
	.getname	= l2cap_sock_getname,
	.sendmsg	= l2cap_sock_sendmsg,
	.recvmsg	= l2cap_sock_recvmsg,
	.poll		= bt_sock_poll,
	.ioctl		= bt_sock_ioctl,
	.mmap		= sock_no_mmap,
	.socketpair	= sock_no_socketpair,
	.shutdown	= l2cap_sock_shutdown,
	.setsockopt	= l2cap_sock_setsockopt,
	.getsockopt	= l2cap_sock_getsockopt
};


static const struct net_proto_family l2cap_sock_family_ops = {
	.family	= PF_BLUETOOTH,
	.owner	= THIS_MODULE,
	.create	= l2cap_sock_create,
};




int __init l2cap_init_sockets(void)
{
	int err;

	BUILD_BUG_ON(sizeof(struct sockaddr_l2) > sizeof(struct sockaddr));

	err = proto_register(&l2cap_proto, 0);
	if (err < 0)
		return err;

	err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops);
	if (err < 0) {
		BT_ERR("L2CAP socket registration failed");
		goto error;
	}

	err = bt_procfs_init(&init_net, "l2cap", &l2cap_sk_list,
			     NULL);
	if (err < 0) {
		BT_ERR("Failed to create L2CAP proc file");
		bt_sock_unregister(BTPROTO_L2CAP);
		goto error;
	}

	BT_INFO("L2CAP socket layer initialized");

	return 0;

error:
	proto_unregister(&l2cap_proto);
	return err;
}


Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan6853.97%133.33%


Masatake YAMATO4334.13%133.33%


Marcel Holtmann1511.90%133.33%


Total126100.00%3100.00%






void l2cap_cleanup_sockets(void)
{
	bt_procfs_cleanup(&init_net, "l2cap");
	bt_sock_unregister(BTPROTO_L2CAP);
	proto_unregister(&l2cap_proto);
}

Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan1869.23%150.00%


Masatake YAMATO830.77%150.00%


Total26100.00%2100.00%




Overall Contributors
PersonTokensPropCommitsCommitProp
Gustavo Fernando Padovan424858.95%5532.35%


Johan Hedberg91612.71%3319.41%


Andrei Emeltchenko5487.60%1810.59%


Mat Martineau3414.73%52.94%


Marcel Holtmann3074.26%169.41%


Dean Jenkins2183.03%84.71%


Jaikumar Ganesh1592.21%10.59%


Masatake YAMATO821.14%10.59%


Vinicius Costa Gomes751.04%31.76%


Andre Guedes710.99%31.76%


Peter Hurley430.60%21.18%


Daniel Borkmann350.49%10.59%


David Herrmann250.35%10.59%


Mathias Krause130.18%10.59%


Vasiliy Kulikov130.18%10.59%


Filip Palian130.18%10.59%


Jukka Taimisto120.17%10.59%


Eric W. Biedermann120.17%10.59%


Ville Tervo110.15%21.18%


Vladimir Davydov90.12%10.59%


Sasha Levin90.12%10.59%


Steffen Hurrle70.10%10.59%


Paul Moore70.10%10.59%


Octavian Purdila70.10%10.59%


Santosh Nayak60.08%10.59%


Ingo Molnar30.04%10.59%


Paul Gortmaker30.04%10.59%


David Howells30.04%10.59%


Joe Perches30.04%10.59%


Jaganath Kanakkassery20.03%21.18%


Johannes Berg20.03%10.59%


Amadeusz Sławiński10.01%10.59%


Lucas De Marchi10.01%10.59%


Patrik Flykt10.01%10.59%


Total7206100.00%170100.00%


Directory: net/bluetooth



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