Release 4.15 net/bluetooth/l2cap_core.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
   Copyright (c) 2012 Code Aurora Forum.  All rights reserved.

   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 core. */

#include <linux/module.h>

#include <linux/debugfs.h>
#include <linux/crc16.h>
#include <linux/filter.h>

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

#include "smp.h"
#include "a2mp.h"
#include "amp.h"


#define LE_FLOWCTL_MAX_CREDITS 65535


bool disable_ertm;


static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN | L2CAP_FEAT_UCD;

static LIST_HEAD(chan_list);
static DEFINE_RWLOCK(chan_list_lock);


static u16 le_max_credits = L2CAP_LE_MAX_CREDITS;

static u16 le_default_mps = L2CAP_LE_DEFAULT_MPS;

static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn,
				       u8 code, u8 ident, u16 dlen, void *data);
static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len,
			   void *data);
static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data, size_t data_size);
static void l2cap_send_disconn_req(struct l2cap_chan *chan, int err);

static void l2cap_tx(struct l2cap_chan *chan, struct l2cap_ctrl *control,
		     struct sk_buff_head *skbs, u8 event);



static inline u8 bdaddr_type(u8 link_type, u8 bdaddr_type)
{
	if (link_type == LE_LINK) {
		if (bdaddr_type == ADDR_LE_DEV_PUBLIC)
			return BDADDR_LE_PUBLIC;
		else
			return BDADDR_LE_RANDOM;
	}

	return BDADDR_BREDR;
}

Contributors
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Marcel Holtmann 30 81.08% 1 50.00%
Johan Hedberg 7 18.92% 1 50.00%
Total 37 100.00% 2 100.00%



static inline u8 bdaddr_src_type(struct hci_conn *hcon)
{
	return bdaddr_type(hcon->type, hcon->src_type);
}

Contributors
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Johan Hedberg 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%



static inline u8 bdaddr_dst_type(struct hci_conn *hcon)
{
	return bdaddr_type(hcon->type, hcon->dst_type);
}

Contributors
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Johan Hedberg 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%

/* ---- L2CAP channels ---- */



static struct l2cap_chan *__l2cap_get_chan_by_dcid(struct l2cap_conn *conn,
						   u16 cid)
{
	struct l2cap_chan *c;

	list_for_each_entry(c, &conn->chan_l, list) {
		if (c->dcid == cid)
			return c;
	}
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 19 42.22% 4 50.00%
Linus Torvalds 11 24.44% 1 12.50%
Marcel Holtmann 9 20.00% 1 12.50%
Andrei Emeltchenko 4 8.89% 1 12.50%
Maksim Krasnyanskiy 2 4.44% 1 12.50%
Total 45 100.00% 8 100.00%



static struct l2cap_chan *__l2cap_get_chan_by_scid(struct l2cap_conn *conn,
						   u16 cid)
{
	struct l2cap_chan *c;

	list_for_each_entry(c, &conn->chan_l, list) {
		if (c->scid == cid)
			return c;
	}
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 18 40.00% 3 42.86%
Linus Torvalds 9 20.00% 1 14.29%
Marcel Holtmann 8 17.78% 1 14.29%
Maksim Krasnyanskiy 6 13.33% 1 14.29%
Andrei Emeltchenko 4 8.89% 1 14.29%
Total 45 100.00% 7 100.00%

/* Find channel with given SCID.
 * Returns locked channel. */


static struct l2cap_chan *l2cap_get_chan_by_scid(struct l2cap_conn *conn,
						 u16 cid)
{
	struct l2cap_chan *c;

	mutex_lock(&conn->chan_lock);
	c = __l2cap_get_chan_by_scid(conn, cid);
	if (c)
		l2cap_chan_lock(c);
	mutex_unlock(&conn->chan_lock);

	return c;
}

Contributors
Person Tokens Prop Commits CommitProp
Maxim Krasnyansky 15 25.86% 1 16.67%
Marcel Holtmann 13 22.41% 1 16.67%
Andrei Emeltchenko 12 20.69% 1 16.67%
Gustavo Fernando Padovan 9 15.52% 2 33.33%
Mat Martineau 9 15.52% 1 16.67%
Total 58 100.00% 6 100.00%

/* Find channel with given DCID.
 * Returns locked channel.
 */


static struct l2cap_chan *l2cap_get_chan_by_dcid(struct l2cap_conn *conn,
						 u16 cid)
{
	struct l2cap_chan *c;

	mutex_lock(&conn->chan_lock);
	c = __l2cap_get_chan_by_dcid(conn, cid);
	if (c)
		l2cap_chan_lock(c);
	mutex_unlock(&conn->chan_lock);

	return c;
}

Contributors
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Mat Martineau 58 100.00% 1 100.00%
Total 58 100.00% 1 100.00%



static struct l2cap_chan *__l2cap_get_chan_by_ident(struct l2cap_conn *conn,
						    u8 ident)
{
	struct l2cap_chan *c;

	list_for_each_entry(c, &conn->chan_l, list) {
		if (c->ident == ident)
			return c;
	}
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Marcel Holtmann 22 48.89% 2 28.57%
Gustavo Fernando Padovan 19 42.22% 4 57.14%
Andrei Emeltchenko 4 8.89% 1 14.29%
Total 45 100.00% 7 100.00%



static struct l2cap_chan *l2cap_get_chan_by_ident(struct l2cap_conn *conn,
						  u8 ident)
{
	struct l2cap_chan *c;

	mutex_lock(&conn->chan_lock);
	c = __l2cap_get_chan_by_ident(conn, ident);
	if (c)
		l2cap_chan_lock(c);
	mutex_unlock(&conn->chan_lock);

	return c;
}

Contributors
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Mat Martineau 58 100.00% 1 100.00%
Total 58 100.00% 1 100.00%



static struct l2cap_chan *__l2cap_global_chan_by_addr(__le16 psm, bdaddr_t *src)
{
	struct l2cap_chan *c;

	list_for_each_entry(c, &chan_list, global_l) {
		if (c->sport == psm && !bacmp(&c->src, src))
			return c;
	}
	return NULL;
}

Contributors
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Gustavo Fernando Padovan 51 92.73% 3 75.00%
Szymon Janc 4 7.27% 1 25.00%
Total 55 100.00% 4 100.00%



int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm)
{
	int err;

	write_lock(&chan_list_lock);

	if (psm && __l2cap_global_chan_by_addr(psm, src)) {
		err = -EADDRINUSE;
		goto done;
	}

	if (psm) {
		chan->psm = psm;
		chan->sport = psm;
		err = 0;
	} else {
		u16 p, start, end, incr;

		if (chan->src_type == BDADDR_BREDR) {
			start = L2CAP_PSM_DYN_START;
			end = L2CAP_PSM_AUTO_END;
			incr = 2;
		} else {
			start = L2CAP_PSM_LE_DYN_START;
			end = L2CAP_PSM_LE_DYN_END;
			incr = 1;
		}

		err = -EINVAL;
		for (p = start; p <= end; p += incr)
			if (!__l2cap_global_chan_by_addr(cpu_to_le16(p), src)) {
				chan->psm   = cpu_to_le16(p);
				chan->sport = cpu_to_le16(p);
				err = 0;
				break;
			}
	}

done:
	write_unlock(&chan_list_lock);
	return err;
}
Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 139 74.73% 4 80.00%
Johan Hedberg 47 25.27% 1 20.00%
Total 186 100.00% 5 100.00%


EXPORT_SYMBOL_GPL(l2cap_add_psm);



int l2cap_add_scid(struct l2cap_chan *chan,  __u16 scid)
{
	write_lock(&chan_list_lock);

	/* Override the defaults (which are for conn-oriented) */
	chan->omtu = L2CAP_DEFAULT_MTU;
	chan->chan_type = L2CAP_CHAN_FIXED;

	chan->scid = scid;

	write_unlock(&chan_list_lock);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 34 72.34% 3 75.00%
Johan Hedberg 13 27.66% 1 25.00%
Total 47 100.00% 4 100.00%



static u16 l2cap_alloc_cid(struct l2cap_conn *conn)
{
	u16 cid, dyn_end;

	if (conn->hcon->type == LE_LINK)
		dyn_end = L2CAP_CID_LE_DYN_END;
	else
		dyn_end = L2CAP_CID_DYN_END;

	for (cid = L2CAP_CID_DYN_START; cid <= dyn_end; cid++) {
		if (!__l2cap_get_chan_by_scid(conn, cid))
			return cid;
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Marcel Holtmann 37 56.06% 2 40.00%
Johan Hedberg 26 39.39% 2 40.00%
Gustavo Fernando Padovan 3 4.55% 1 20.00%
Total 66 100.00% 5 100.00%



static void l2cap_state_change(struct l2cap_chan *chan, int state)
{
	BT_DBG("chan %p %s -> %s", chan, state_to_string(chan->state),
	       state_to_string(state));

	chan->state = state;
	chan->ops->state_change(chan, state, 0);
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 51 98.08% 4 80.00%
Andrei Emeltchenko 1 1.92% 1 20.00%
Total 52 100.00% 5 100.00%



static inline void l2cap_state_change_and_error(struct l2cap_chan *chan,
						int state, int err)
{
	chan->state = state;
	chan->ops->state_change(chan, chan->state, err);
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 20 51.28% 2 66.67%
Andrei Emeltchenko 19 48.72% 1 33.33%
Total 39 100.00% 3 100.00%



static inline void l2cap_chan_set_err(struct l2cap_chan *chan, int err)
{
	chan->ops->state_change(chan, chan->state, err);
}

Contributors
Person Tokens Prop Commits CommitProp
Andrei Emeltchenko 21 70.00% 1 50.00%
Gustavo Fernando Padovan 9 30.00% 1 50.00%
Total 30 100.00% 2 100.00%



static void __set_retrans_timer(struct l2cap_chan *chan)
{
	if (!delayed_work_pending(&chan->monitor_timer) &&
	    chan->retrans_timeout) {
		l2cap_set_timer(chan, &chan->retrans_timer,
				msecs_to_jiffies(chan->retrans_timeout));
	}
}

Contributors
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Mat Martineau 45 100.00% 1 100.00%
Total 45 100.00% 1 100.00%



static void __set_monitor_timer(struct l2cap_chan *chan)
{
	__clear_retrans_timer(chan);
	if (chan->monitor_timeout) {
		l2cap_set_timer(chan, &chan->monitor_timer,
				msecs_to_jiffies(chan->monitor_timeout));
	}
}

Contributors
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Mat Martineau 41 100.00% 1 100.00%
Total 41 100.00% 1 100.00%



static struct sk_buff *l2cap_ertm_seq_in_queue(struct sk_buff_head *head,
					       u16 seq)
{
	struct sk_buff *skb;

	skb_queue_walk(head, skb) {
		if (bt_cb(skb)->l2cap.txseq == seq)
			return skb;
	}

	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 47 97.92% 1 50.00%
Johan Hedberg 1 2.08% 1 50.00%
Total 48 100.00% 2 100.00%

/* ---- L2CAP sequence number lists ---- */

/* For ERTM, ordered lists of sequence numbers must be tracked for
 * SREJ requests that are received and for frames that are to be
 * retransmitted. These seq_list functions implement a singly-linked
 * list in an array, where membership in the list can also be checked
 * in constant time. Items can also be added to the tail of the list
 * and removed from the head in constant time, without further memory
 * allocs or frees.
 */



static int l2cap_seq_list_init(struct l2cap_seq_list *seq_list, u16 size)
{
	size_t alloc_size, i;

	/* Allocated size is a power of 2 to map sequence numbers
         * (which may be up to 14 bits) in to a smaller array that is
         * sized for the negotiated ERTM transmit windows.
         */
	alloc_size = roundup_pow_of_two(size);

	seq_list->list = kmalloc(sizeof(u16) * alloc_size, GFP_KERNEL);
	if (!seq_list->list)
		return -ENOMEM;

	seq_list->mask = alloc_size - 1;
	seq_list->head = L2CAP_SEQ_LIST_CLEAR;
	seq_list->tail = L2CAP_SEQ_LIST_CLEAR;
	for (i = 0; i < alloc_size; i++)
		seq_list->list[i] = L2CAP_SEQ_LIST_CLEAR;

	return 0;
}

Contributors
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Mat Martineau 99 100.00% 1 100.00%
Total 99 100.00% 1 100.00%



static inline void l2cap_seq_list_free(struct l2cap_seq_list *seq_list)
{
	kfree(seq_list->list);
}

Contributors
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Mat Martineau 19 100.00% 1 100.00%
Total 19 100.00% 1 100.00%



static inline bool l2cap_seq_list_contains(struct l2cap_seq_list *seq_list,
					   u16 seq)
{
	/* Constant-time check for list membership */
	return seq_list->list[seq & seq_list->mask] != L2CAP_SEQ_LIST_CLEAR;
}

Contributors
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Mat Martineau 30 100.00% 1 100.00%
Total 30 100.00% 1 100.00%



static inline u16 l2cap_seq_list_pop(struct l2cap_seq_list *seq_list)
{
	u16 seq = seq_list->head;
	u16 mask = seq_list->mask;

	seq_list->head = seq_list->list[seq & mask];
	seq_list->list[seq & mask] = L2CAP_SEQ_LIST_CLEAR;

	if (seq_list->head == L2CAP_SEQ_LIST_TAIL) {
		seq_list->head = L2CAP_SEQ_LIST_CLEAR;
		seq_list->tail = L2CAP_SEQ_LIST_CLEAR;
	}

	return seq;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 66 88.00% 1 50.00%
Johan Hedberg 9 12.00% 1 50.00%
Total 75 100.00% 2 100.00%



static void l2cap_seq_list_clear(struct l2cap_seq_list *seq_list)
{
	u16 i;

	if (seq_list->head == L2CAP_SEQ_LIST_CLEAR)
		return;

	for (i = 0; i <= seq_list->mask; i++)
		seq_list->list[i] = L2CAP_SEQ_LIST_CLEAR;

	seq_list->head = L2CAP_SEQ_LIST_CLEAR;
	seq_list->tail = L2CAP_SEQ_LIST_CLEAR;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 54 91.53% 1 50.00%
Gustavo Fernando Padovan 5 8.47% 1 50.00%
Total 59 100.00% 2 100.00%



static void l2cap_seq_list_append(struct l2cap_seq_list *seq_list, u16 seq)
{
	u16 mask = seq_list->mask;

	/* All appends happen in constant time */

	if (seq_list->list[seq & mask] != L2CAP_SEQ_LIST_CLEAR)
		return;

	if (seq_list->tail == L2CAP_SEQ_LIST_CLEAR)
		seq_list->head = seq;
	else
		seq_list->list[seq_list->tail & mask] = seq;

	seq_list->tail = seq;
	seq_list->list[seq & mask] = L2CAP_SEQ_LIST_TAIL;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 79 97.53% 1 50.00%
Gustavo Fernando Padovan 2 2.47% 1 50.00%
Total 81 100.00% 2 100.00%



static void l2cap_chan_timeout(struct work_struct *work)
{
	struct l2cap_chan *chan = container_of(work, struct l2cap_chan,
					       chan_timer.work);
	struct l2cap_conn *conn = chan->conn;
	int reason;

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

	mutex_lock(&conn->chan_lock);
	l2cap_chan_lock(chan);

	if (chan->state == BT_CONNECTED || chan->state == BT_CONFIG)
		reason = ECONNREFUSED;
	else if (chan->state == BT_CONNECT &&
		 chan->sec_level != BT_SECURITY_SDP)
		reason = ECONNREFUSED;
	else
		reason = ETIMEDOUT;

	l2cap_chan_close(chan, reason);

	l2cap_chan_unlock(chan);

	chan->ops->close(chan);
	mutex_unlock(&conn->chan_lock);

	l2cap_chan_put(chan);
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 110 76.92% 6 60.00%
Andrei Emeltchenko 32 22.38% 3 30.00%
Ulisses Furquim 1 0.70% 1 10.00%
Total 143 100.00% 10 100.00%



struct l2cap_chan *l2cap_chan_create(void)
{
	struct l2cap_chan *chan;

	chan = kzalloc(sizeof(*chan), GFP_ATOMIC);
	if (!chan)
		return NULL;

	mutex_init(&chan->lock);

	/* Set default lock nesting level */
	atomic_set(&chan->nesting, L2CAP_NESTING_NORMAL);

	write_lock(&chan_list_lock);
	list_add(&chan->global_l, &chan_list);
	write_unlock(&chan_list_lock);

	INIT_DELAYED_WORK(&chan->chan_timer, l2cap_chan_timeout);

	chan->state = BT_OPEN;

	kref_init(&chan->kref);

	/* This flag is cleared in l2cap_chan_ready() */
	set_bit(CONF_NOT_COMPLETE, &chan->conf_state);

	BT_DBG("chan %p", chan);

	return chan;
}
Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 84 68.85% 8 61.54%
Mat Martineau 11 9.02% 1 7.69%
Johan Hedberg 11 9.02% 1 7.69%
Andrei Emeltchenko 8 6.56% 1 7.69%
Szymon Janc 6 4.92% 1 7.69%
Syam Sidhardhan 2 1.64% 1 7.69%
Total 122 100.00% 13 100.00%


EXPORT_SYMBOL_GPL(l2cap_chan_create);



static void l2cap_chan_destroy(struct kref *kref)
{
	struct l2cap_chan *chan = container_of(kref, struct l2cap_chan, kref);

	BT_DBG("chan %p", chan);

	write_lock(&chan_list_lock);
	list_del(&chan->global_l);
	write_unlock(&chan_list_lock);

	kfree(chan);
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 32 55.17% 3 60.00%
Syam Sidhardhan 17 29.31% 1 20.00%
Jaganath Kanakkassery 9 15.52% 1 20.00%
Total 58 100.00% 5 100.00%



void l2cap_chan_hold(struct l2cap_chan *c)
{
	BT_DBG("chan %p orig refcnt %d", c, kref_read(&c->kref));

	kref_get(&c->kref);
}

Contributors
Person Tokens Prop Commits CommitProp
Jaganath Kanakkassery 29 87.88% 1 33.33%
Syam Sidhardhan 3 9.09% 1 33.33%
Peter Zijlstra 1 3.03% 1 33.33%
Total 33 100.00% 3 100.00%



void l2cap_chan_put(struct l2cap_chan *c)
{
	BT_DBG("chan %p orig refcnt %d", c, kref_read(&c->kref));

	kref_put(&c->kref, l2cap_chan_destroy);
}
Contributors
Person Tokens Prop Commits CommitProp
Jaganath Kanakkassery 30 85.71% 2 50.00%
Syam Sidhardhan 4 11.43% 1 25.00%
Peter Zijlstra 1 2.86% 1 25.00%
Total 35 100.00% 4 100.00%


EXPORT_SYMBOL_GPL(l2cap_chan_put);



void l2cap_chan_set_defaults(struct l2cap_chan *chan)
{
	chan->fcs  = L2CAP_FCS_CRC16;
	chan->max_tx = L2CAP_DEFAULT_MAX_TX;
	chan->tx_win = L2CAP_DEFAULT_TX_WINDOW;
	chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW;
	chan->remote_max_tx = chan->max_tx;
	chan->remote_tx_win = chan->tx_win;
	chan->ack_win = L2CAP_DEFAULT_TX_WINDOW;
	chan->sec_level = BT_SECURITY_LOW;
	chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;
	chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO;
	chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO;
	chan->conf_state = 0;

	set_bit(FLAG_FORCE_ACTIVE, &chan->flags);
}
Contributors
Person Tokens Prop Commits CommitProp
Andrei Emeltchenko 50 52.08% 1 33.33%
Jukka Rissanen 40 41.67% 1 33.33%
Mat Martineau 6 6.25% 1 33.33%
Total 96 100.00% 3 100.00%


EXPORT_SYMBOL_GPL(l2cap_chan_set_defaults);



static void l2cap_le_flowctl_init(struct l2cap_chan *chan)
{
	chan->sdu = NULL;
	chan->sdu_last_frag = NULL;
	chan->sdu_len = 0;
	chan->tx_credits = 0;
	chan->rx_credits = le_max_credits;
	chan->mps = min_t(u16, chan->imtu, le_default_mps);

	skb_queue_head_init(&chan->tx_q);
}

Contributors
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Johan Hedberg 64 100.00% 7 100.00%
Total 64 100.00% 7 100.00%



void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan)
{
	BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn,
	       __le16_to_cpu(chan->psm), chan->dcid);

	conn->disc_reason = HCI_ERROR_REMOTE_USER_TERM;

	chan->conn = conn;

	switch (chan->chan_type) {
	case L2CAP_CHAN_CONN_ORIENTED:
		/* Alloc CID for connection-oriented socket */
		chan->scid = l2cap_alloc_cid(conn);
		if (conn->hcon->type == ACL_LINK)
			chan->omtu = L2CAP_DEFAULT_MTU;
		break;

	case L2CAP_CHAN_CONN_LESS:
		/* Connectionless socket */
		chan->scid = L2CAP_CID_CONN_LESS;
		chan->dcid = L2CAP_CID_CONN_LESS;
		chan->omtu = L2CAP_DEFAULT_MTU;
		break;

	case L2CAP_CHAN_FIXED:
		/* Caller will set CID and CID specific MTU values */
		break;

	default:
		/* Raw socket can send/recv signalling messages only */
		chan->scid = L2CAP_CID_SIGNALING;
		chan->dcid = L2CAP_CID_SIGNALING;
		chan->omtu = L2CAP_DEFAULT_MTU;
	}

	chan->local_id		= L2CAP_BESTEFFORT_ID;
	chan->local_stype	= L2CAP_SERV_BESTEFFORT;
	chan->local_msdu	= L2CAP_DEFAULT_MAX_SDU_SIZE;
	chan->local_sdu_itime	= L2CAP_DEFAULT_SDU_ITIME;
	chan->local_acc_lat	= L2CAP_DEFAULT_ACC_LAT;
	chan->local_flush_to	= L2CAP_EFS_DEFAULT_FLUSH_TO;

	l2cap_chan_hold(chan);

	/* Only keep a reference for fixed channels if they requested it */
	if (chan->chan_type != L2CAP_CHAN_FIXED ||
	    test_bit(FLAG_HOLD_HCI_CONN, &chan->flags))
		hci_conn_hold(conn->hcon);

	list_add(&chan->list, &conn->chan_l);
}

Contributors
Person Tokens Prop Commits CommitProp
Andrei Emeltchenko 55 26.07% 8 27.59%
Marcel Holtmann 54 25.59% 2 6.90%
Johan Hedberg 38 18.01% 4 13.79%
Gustavo Fernando Padovan 35 16.59% 9 31.03%
Maxim Krasnyansky 12 5.69% 1 3.45%
Linus Torvalds 10 4.74% 2 6.90%
Ville Tervo 5 2.37% 1 3.45%
Ulisses Furquim 1 0.47% 1 3.45%
Maksim Krasnyanskiy 1 0.47% 1 3.45%
Total 211 100.00% 29 100.00%



void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan)
{
	mutex_lock(&conn->chan_lock);
	__l2cap_chan_add(conn, chan);
	mutex_unlock(&conn->chan_lock);
}

Contributors
Person Tokens Prop Commits CommitProp
Andrei Emeltchenko 37 97.37% 2 66.67%
Linus Torvalds 1 2.63% 1 33.33%
Total 38 100.00% 3 100.00%



void l2cap_chan_del(struct l2cap_chan *chan, int err)
{
	struct l2cap_conn *conn = chan->conn;

	__clear_chan_timer(chan);

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

	chan->ops->teardown(chan, err);

	if (conn) {
		struct amp_mgr *mgr = conn->hcon->amp_mgr;
		/* Delete from channel list */
		list_del(&chan->list);

		l2cap_chan_put(chan);

		chan->conn = NULL;

		/* Reference was only held for non-fixed channels or
                 * fixed channels that explicitly requested it using the
                 * FLAG_HOLD_HCI_CONN flag.
                 */
		if (chan->chan_type != L2CAP_CHAN_FIXED ||
		    test_bit(FLAG_HOLD_HCI_CONN, &chan->flags))
			hci_conn_drop(conn->hcon);

		if (mgr && mgr->bredr_chan == chan)
			mgr->bredr_chan = NULL;
	}

	if (chan->hs_hchan) {
		struct hci_chan *hs_hchan = chan->hs_hchan;

		BT_DBG("chan %p disconnect hs_hchan %p", chan, hs_hchan);
		amp_disconnect_logical_link(hs_hchan);
	}

	if (test_bit(CONF_NOT_COMPLETE, &chan->conf_state))
		return;

	switch(chan->mode) {
	case L2CAP_MODE_BASIC:
		break;

	case L2CAP_MODE_LE_FLOWCTL:
		skb_queue_purge(&chan->tx_q);
		break;

	case L2CAP_MODE_ERTM:
		__clear_retrans_timer(chan);
		__clear_monitor_timer(chan);
		__clear_ack_timer(chan);

		skb_queue_purge(&chan->srej_q);

		l2cap_seq_list_free(&chan->srej_list);
		l2cap_seq_list_free(&chan->retrans_list);

		/* fall through */

	case L2CAP_MODE_STREAMING:
		skb_queue_purge(&chan->tx_q);
		break;
	}

	return;
}
Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 81 31.27% 17 48.57%
Andrei Emeltchenko 62 23.94% 5 14.29%
Johan Hedberg 44 16.99% 5 14.29%
Marcel Holtmann 28 10.81% 1 2.86%
Mat Martineau 17 6.56% 2 5.71%
Maksim Krasnyanskiy 15 5.79% 1 2.86%
Linus Torvalds 10 3.86% 2 5.71%
David Herrmann 1 0.39% 1 2.86%
Ulisses Furquim 1 0.39% 1 2.86%
Total 259 100.00% 35 100.00%


EXPORT_SYMBOL_GPL(l2cap_chan_del);



static void l2cap_conn_update_id_addr(struct work_struct *work)
{
	struct l2cap_conn *conn = container_of(work, struct l2cap_conn,
					       id_addr_update_work);
	struct hci_conn *hcon = conn->hcon;
	struct l2cap_chan *chan;

	mutex_lock(&conn->chan_lock);

	list_for_each_entry(chan, &conn->chan_l, list) {
		l2cap_chan_lock(chan);
		bacpy(&chan->dst, &hcon->dst);
		chan->dst_type = bdaddr_dst_type(hcon);
		l2cap_chan_unlock(chan);
	}

	mutex_unlock(&conn->chan_lock);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 98 100.00% 3 100.00%
Total 98 100.00% 3 100.00%



static void l2cap_chan_le_connect_reject(struct l2cap_chan *chan)
{
	struct l2cap_conn *conn = chan->conn;
	struct l2cap_le_conn_rsp rsp;
	u16 result;

	if (test_bit(FLAG_DEFER_SETUP, &chan->flags))
		result = L2CAP_CR_AUTHORIZATION;
	else
		result = L2CAP_CR_BAD_PSM;

	l2cap_state_change(chan, BT_DISCONN);

	rsp.dcid    = cpu_to_le16(chan->scid);
	rsp.mtu     = cpu_to_le16(chan->imtu);
	rsp.mps     = cpu_to_le16(chan->mps);
	rsp.credits = cpu_to_le16(chan->rx_credits);
	rsp.result  = cpu_to_le16(result);

	l2cap_send_cmd(conn, chan->ident, L2CAP_LE_CONN_RSP, sizeof(rsp),
		       &rsp);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 127 100.00% 3 100.00%
Total 127 100.00% 3 100.00%



static void l2cap_chan_connect_reject(struct l2cap_chan *chan)
{
	struct l2cap_conn *conn = chan->conn;
	struct l2cap_conn_rsp rsp;
	u16 result;

	if (test_bit(FLAG_DEFER_SETUP, &chan->flags))
		result = L2CAP_CR_SEC_BLOCK;
	else
		result = L2CAP_CR_BAD_PSM;

	l2cap_state_change(chan, BT_DISCONN);

	rsp.scid   = cpu_to_le16(chan->dcid);
	rsp.dcid   = cpu_to_le16(chan->scid);
	rsp.result = cpu_to_le16(result);
	rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);

	l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 113 99.12% 1 50.00%
Joe Perches 1 0.88% 1 50.00%
Total 114 100.00% 2 100.00%



void l2cap_chan_close(struct l2cap_chan *chan, int reason)
{
	struct l2cap_conn *conn = chan->conn;

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

	switch (chan->state) {
	case BT_LISTEN:
		chan->ops->teardown(chan, 0);
		break;

	case BT_CONNECTED:
	case BT_CONFIG:
		if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED) {
			__set_chan_timer(chan, chan->ops->get_sndtimeo(chan));
			l2cap_send_disconn_req(chan, reason);
		} else
			l2cap_chan_del(chan, reason);
		break;

	case BT_CONNECT2:
		if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED) {
			if (conn->hcon->type == ACL_LINK)
				l2cap_chan_connect_reject(chan);
			else if (conn->hcon->type == LE_LINK)
				l2cap_chan_le_connect_reject(chan);
		}

		l2cap_chan_del(chan, reason);
		break;

	case BT_CONNECT:
	case BT_DISCONN:
		l2cap_chan_del(chan, reason);
		break;

	default:
		chan->ops->teardown(chan, 0);
		break;
	}
}
Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 141 76.63% 7 53.85%
Johan Hedberg 21 11.41% 2 15.38%
Andrei Emeltchenko 21 11.41% 3 23.08%
Marcel Holtmann 1 0.54% 1 7.69%
Total 184 100.00% 13 100.00%


EXPORT_SYMBOL(l2cap_chan_close);



static inline u8 l2cap_get_auth_type(struct l2cap_chan *chan)
{
	switch (chan->chan_type) {
	case L2CAP_CHAN_RAW:
		switch (chan->sec_level) {
		case BT_SECURITY_HIGH:
		case BT_SECURITY_FIPS:
			return HCI_AT_DEDICATED_BONDING_MITM;
		case BT_SECURITY_MEDIUM:
			return HCI_AT_DEDICATED_BONDING;
		default:
			return HCI_AT_NO_BONDING;
		}
		break;
	case L2CAP_CHAN_CONN_LESS:
		if (chan->psm == cpu_to_le16(L2CAP_PSM_3DSP)) {
			if (chan->sec_level == BT_SECURITY_LOW)
				chan->sec_level = BT_SECURITY_SDP;
		}
		if (chan->sec_level == BT_SECURITY_HIGH ||
		    chan->sec_level == BT_SECURITY_FIPS)
			return HCI_AT_NO_BONDING_MITM;
		else
			return HCI_AT_NO_BONDING;
		break;
	case L2CAP_CHAN_CONN_ORIENTED:
		if (chan->psm == cpu_to_le16(L2CAP_PSM_SDP)) {
			if (chan->sec_level == BT_SECURITY_LOW)
				chan->sec_level = BT_SECURITY_SDP;

			if (chan->sec_level == BT_SECURITY_HIGH ||
			    chan->sec_level == BT_SECURITY_FIPS)
				return HCI_AT_NO_BONDING_MITM;
			else
				return HCI_AT_NO_BONDING;
		}
		/* fall through */
	default:
		switch (chan->sec_level) {
		case BT_SECURITY_HIGH:
		case BT_SECURITY_FIPS:
			return HCI_AT_GENERAL_BONDING_MITM;
		case BT_SECURITY_MEDIUM:
			return HCI_AT_GENERAL_BONDING;
		default:
			return HCI_AT_NO_BONDING;
		}
		break;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Marcel Holtmann 120 65.22% 6 50.00%
Johan Hedberg 51 27.72% 1 8.33%
Gustavo Fernando Padovan 10 5.43% 3 25.00%
Joe Perches 2 1.09% 1 8.33%
Andrei Emeltchenko 1 0.54% 1 8.33%
Total 184 100.00% 12 100.00%

/* Service level security */


int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator)
{
	struct l2cap_conn *conn = chan->conn;
	__u8 auth_type;

	if (conn->hcon->type == LE_LINK)
		return smp_conn_security(conn->hcon, chan->sec_level);

	auth_type = l2cap_get_auth_type(chan);

	return hci_conn_security(conn->hcon, chan->sec_level, auth_type,
				 initiator);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 50 71.43% 3 33.33%
Marcel Holtmann 14 20.00% 4 44.44%
Gustavo Fernando Padovan 6 8.57% 2 22.22%
Total 70 100.00% 9 100.00%



static u8 l2cap_get_ident(struct l2cap_conn *conn)
{
	u8 id;

	/* Get next available identificator.
         *    1 - 128 are used by kernel.
         *  129 - 199 are reserved.
         *  200 - 254 are used by utilities like l2ping, etc.
         */

	mutex_lock(&conn->ident_lock);

	if (++conn->tx_ident > 128)
		conn->tx_ident = 1;

	id = conn->tx_ident;

	mutex_unlock(&conn->ident_lock);

	return id;
}

Contributors
Person Tokens Prop Commits CommitProp
Marcel Holtmann 54 98.18% 2 66.67%
Johannes Berg 1 1.82% 1 33.33%
Total 55 100.00% 3 100.00%



static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len,
			   void *data)
{
	struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data);
	u8 flags;

	BT_DBG("code 0x%2.2x", code);

	if (!skb)
		return;

	/* Use NO_FLUSH if supported or we have an LE link (which does
         * not support auto-flushing packets) */
	if (lmp_no_flush_capable(conn->hcon->hdev) ||
	    conn->hcon->type == LE_LINK)
		flags = ACL_START_NO_FLUSH;
	else
		flags = ACL_START;

	bt_cb(skb)->force_active = BT_POWER_FORCE_ACTIVE_ON;
	skb->priority = HCI_PRIO_MAX;

	hci_send_acl(conn->hchan, skb, flags);
}

Contributors
Person Tokens Prop Commits CommitProp
Marcel Holtmann 55 48.67% 1 12.50%
Andrei Emeltchenko 23 20.35% 1 12.50%
Luiz Augusto von Dentz 14 12.39% 2 25.00%
Steven Walter 9 7.96% 1 12.50%
Jaikumar Ganesh 9 7.96% 1 12.50%
Gustavo Fernando Padovan 3 2.65% 2 25.00%
Total 113 100.00% 8 100.00%



static bool __chan_is_moving(struct l2cap_chan *chan)
{
	return chan->move_state != L2CAP_MOVE_STABLE &&
	       chan->move_state != L2CAP_MOVE_WAIT_PREPARE;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%



static void l2cap_do_send(struct l2cap_chan *chan, struct sk_buff *skb)
{
	struct hci_conn *hcon = chan->conn->hcon;
	u16 flags;

	BT_DBG("chan %p, skb %p len %d priority %u", chan, skb, skb->len,
	       skb->priority);

	if (chan->hs_hcon && !__chan_is_moving(chan)) {
		if (chan->hs_hchan)
			hci_send_acl(chan->hs_hchan, skb, ACL_COMPLETE);
		else
			kfree_skb(skb);

		return;
	}

	/* Use NO_FLUSH for LE links (where this is the only option) or
         * if the BR/EDR link supports it and flushing has not been
         * explicitly requested (through FLAG_FLUSHABLE).
         */
	if (hcon->type == LE_LINK ||
	    (!test_bit(FLAG_FLUSHABLE, &chan->flags) &&
	     lmp_no_flush_capable(hcon->hdev)))
		flags = ACL_START_NO_FLUSH;
	else
		flags = ACL_START;

	bt_cb(skb)->force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags);
	hci_send_acl(chan->conn->hchan, skb, flags);
}

Contributors
Person Tokens Prop Commits CommitProp
Luiz Augusto von Dentz 97 63.40% 1 16.67%
Mat Martineau 38 24.84% 1 16.67%
Steven Walter 9 5.88% 1 16.67%
Marcel Holtmann 7 4.58% 1 16.67%
Gustavo Fernando Padovan 1 0.65% 1 16.67%
Andrei Emeltchenko 1 0.65% 1 16.67%
Total 153 100.00% 6 100.00%



static void __unpack_enhanced_control(u16 enh, struct l2cap_ctrl *control)
{
	control->reqseq = (enh & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT;
	control->final = (enh & L2CAP_CTRL_FINAL) >> L2CAP_CTRL_FINAL_SHIFT;

	if (enh & L2CAP_CTRL_FRAME_TYPE) {
		/* S-Frame */
		control->sframe = 1;
		control->poll = (enh & L2CAP_CTRL_POLL) >> L2CAP_CTRL_POLL_SHIFT;
		control->super = (enh & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT;

		control->sar = 0;
		control->txseq = 0;
	} else {
		/* I-Frame */
		control->sframe = 0;
		control->sar = (enh & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT;
		control->txseq = (enh & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT;

		control->poll = 0;
		control->super = 0;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 109 80.74% 2 18.18%
Gustavo Fernando Padovan 26 19.26% 9 81.82%
Total 135 100.00% 11 100.00%



static void __unpack_extended_control(u32 ext, struct l2cap_ctrl *control)
{
	control->reqseq = (ext & L2CAP_EXT_CTRL_REQSEQ) >> L2CAP_EXT_CTRL_REQSEQ_SHIFT;
	control->final = (ext & L2CAP_EXT_CTRL_FINAL) >> L2CAP_EXT_CTRL_FINAL_SHIFT;

	if (ext & L2CAP_EXT_CTRL_FRAME_TYPE) {
		/* S-Frame */
		control->sframe = 1;
		control->poll = (ext & L2CAP_EXT_CTRL_POLL) >> L2CAP_EXT_CTRL_POLL_SHIFT;
		control->super = (ext & L2CAP_EXT_CTRL_SUPERVISE) >> L2CAP_EXT_CTRL_SUPER_SHIFT;

		control->sar = 0;
		control->txseq = 0;
	} else {
		/* I-Frame */
		control->sframe = 0;
		control->sar = (ext & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT;
		control->txseq = (ext & L2CAP_EXT_CTRL_TXSEQ) >> L2CAP_EXT_CTRL_TXSEQ_SHIFT;

		control->poll = 0;
		control->super = 0;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 135 100.00% 2 100.00%
Total 135 100.00% 2 100.00%



static inline void __unpack_control(struct l2cap_chan *chan,
				    struct sk_buff *skb)
{
	if (test_bit(FLAG_EXT_CTRL, &chan->flags)) {
		__unpack_extended_control(get_unaligned_le32(skb->data),
					  &bt_cb(skb)->l2cap);
		skb_pull(skb, L2CAP_EXT_CTRL_SIZE);
	} else {
		__unpack_enhanced_control(get_unaligned_le16(skb->data),
					  &bt_cb(skb)->l2cap);
		skb_pull(skb, L2CAP_ENH_CTRL_SIZE);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 82 97.62% 2 66.67%
Johan Hedberg 2 2.38% 1 33.33%
Total 84 100.00% 3 100.00%



static u32 __pack_extended_control(struct l2cap_ctrl *control)
{
	u32 packed;

	packed = control->reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT;
	packed |= control->final << L2CAP_EXT_CTRL_FINAL_SHIFT;

	if (control->sframe) {
		packed |= control->poll << L2CAP_EXT_CTRL_POLL_SHIFT;
		packed |= control->super << L2CAP_EXT_CTRL_SUPER_SHIFT;
		packed |= L2CAP_EXT_CTRL_FRAME_TYPE;
	} else {
		packed |= control->sar << L2CAP_EXT_CTRL_SAR_SHIFT;
		packed |= control->txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT;
	}

	return packed;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 80 100.00% 1 100.00%
Total 80 100.00% 1 100.00%



static u16 __pack_enhanced_control(struct l2cap_ctrl *control)
{
	u16 packed;

	packed = control->reqseq << L2CAP_CTRL_REQSEQ_SHIFT;
	packed |= control->final << L2CAP_CTRL_FINAL_SHIFT;

	if (control->sframe) {
		packed |= control->poll << L2CAP_CTRL_POLL_SHIFT;
		packed |= control->super << L2CAP_CTRL_SUPER_SHIFT;
		packed |= L2CAP_CTRL_FRAME_TYPE;
	} else {
		packed |= control->sar << L2CAP_CTRL_SAR_SHIFT;
		packed |= control->txseq << L2CAP_CTRL_TXSEQ_SHIFT;
	}

	return packed;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 80 100.00% 2 100.00%
Total 80 100.00% 2 100.00%



static inline void __pack_control(struct l2cap_chan *chan,
				  struct l2cap_ctrl *control,
				  struct sk_buff *skb)
{
	if (test_bit(FLAG_EXT_CTRL, &chan->flags)) {
		put_unaligned_le32(__pack_extended_control(control),
				   skb->data + L2CAP_HDR_SIZE);
	} else {
		put_unaligned_le16(__pack_enhanced_control(control),
				   skb->data + L2CAP_HDR_SIZE);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 67 100.00% 2 100.00%
Total 67 100.00% 2 100.00%



static inline unsigned int __ertm_hdr_size(struct l2cap_chan *chan)
{
	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
		return L2CAP_EXT_HDR_SIZE;
	else
		return L2CAP_ENH_HDR_SIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 32 100.00% 1 100.00%
Total 32 100.00% 1 100.00%



static struct sk_buff *l2cap_create_sframe_pdu(struct l2cap_chan *chan,
					       u32 control)
{
	struct sk_buff *skb;
	struct l2cap_hdr *lh;
	int hlen = __ertm_hdr_size(chan);

	if (chan->fcs == L2CAP_FCS_CRC16)
		hlen += L2CAP_FCS_SIZE;

	skb = bt_skb_alloc(hlen, GFP_KERNEL);

	if (!skb)
		return ERR_PTR(-ENOMEM);

	lh = skb_put(skb, L2CAP_HDR_SIZE);
	lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE);
	lh->cid = cpu_to_le16(chan->dcid);

	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
		put_unaligned_le32(control, skb_put(skb, L2CAP_EXT_CTRL_SIZE));
	else
		put_unaligned_le16(control, skb_put(skb, L2CAP_ENH_CTRL_SIZE));

	if (chan->fcs == L2CAP_FCS_CRC16) {
		u16 fcs = crc16(0, (u8 *)skb->data, skb->len);
		put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE));
	}

	skb->priority = HCI_PRIO_MAX;
	return skb;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 183 98.39% 3 75.00%
Gustavo Fernando Padovan 3 1.61% 1 25.00%
Total 186 100.00% 4 100.00%



static void l2cap_send_sframe(struct l2cap_chan *chan,
			      struct l2cap_ctrl *control)
{
	struct sk_buff *skb;
	u32 control_field;

	BT_DBG("chan %p, control %p", chan, control);

	if (!control->sframe)
		return;

	if (__chan_is_moving(chan))
		return;

	if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state) &&
	    !control->poll)
		control->final = 1;

	if (control->super == L2CAP_SUPER_RR)
		clear_bit(CONN_RNR_SENT, &chan->conn_state);
	else if (control->super == L2CAP_SUPER_RNR)
		set_bit(CONN_RNR_SENT, &chan->conn_state);

	if (control->super != L2CAP_SUPER_SREJ) {
		chan->last_acked_seq = control->reqseq;
		__clear_ack_timer(chan);
	}

	BT_DBG("reqseq %d, final %d, poll %d, super %d", control->reqseq,
	       control->final, control->poll, control->super);

	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
		control_field = __pack_extended_control(control);
	else
		control_field = __pack_enhanced_control(control);

	skb = l2cap_create_sframe_pdu(chan, control_field);
	if (!IS_ERR(skb))
		l2cap_do_send(chan, skb);
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 204 100.00% 4 100.00%
Total 204 100.00% 4 100.00%



static void l2cap_send_rr_or_rnr(struct l2cap_chan *chan, bool poll)
{
	struct l2cap_ctrl control;

	BT_DBG("chan %p, poll %d", chan, poll);

	memset(&control, 0, sizeof(control));
	control.sframe = 1;
	control.poll = poll;

	if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state))
		control.super = L2CAP_SUPER_RNR;
	else
		control.super = L2CAP_SUPER_RR;

	control.reqseq = chan->buffer_seq;
	l2cap_send_sframe(chan, &control);
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 93 100.00% 3 100.00%
Total 93 100.00% 3 100.00%



static inline int __l2cap_no_conn_pending(struct l2cap_chan *chan)
{
	if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED)
		return true;

	return !test_bit(CONF_CONNECT_PEND, &chan->conf_state);
}

Contributors
Person Tokens Prop Commits CommitProp
Andrei Emeltchenko 15 42.86% 1 25.00%
Johan Hedberg 11 31.43% 1 25.00%
Gustavo Fernando Padovan 9 25.71% 2 50.00%
Total 35 100.00% 4 100.00%



static bool __amp_capable(struct l2cap_chan *chan)
{
	struct l2cap_conn *conn = chan->conn;
	struct hci_dev *hdev;
	bool amp_available = false;

	if (!(conn->local_fixed_chan & L2CAP_FC_A2MP))
		return false;

	if (!(conn->remote_fixed_chan & L2CAP_FC_A2MP))
		return false;

	read_lock(&hci_dev_list_lock);
	list_for_each_entry(hdev, &hci_dev_list, list) {
		if (hdev->amp_type != AMP_TYPE_BREDR &&
		    test_bit(HCI_UP, &hdev->flags)) {
			amp_available = true;
			break;
		}
	}
	read_unlock(&hci_dev_list_lock);

	if (chan->chan_policy == BT_CHANNEL_POLICY_AMP_PREFERRED)
		return amp_available;

	return false;
}

Contributors
Person Tokens Prop Commits CommitProp
Marcel Holtmann 99 83.19% 2 50.00%
Andrei Emeltchenko 14 11.76% 1 25.00%
Johan Hedberg 6 5.04% 1 25.00%
Total 119 100.00% 4 100.00%



static bool l2cap_check_efs(struct l2cap_chan *chan)
{
	/* Check EFS parameters */
	return true;
}

Contributors
Person Tokens Prop Commits CommitProp
Andrei Emeltchenko 15 100.00% 1 100.00%
Total 15 100.00% 1 100.00%



void l2cap_send_conn_req(struct l2cap_chan *chan)
{
	struct l2cap_conn *conn = chan->conn;
	struct l2cap_conn_req req;

	req.scid = cpu_to_le16(chan->scid);
	req.psm  = chan->psm;

	chan->ident = l2cap_get_ident(conn);

	set_bit(CONF_CONNECT_PEND, &chan->conf_state);

	l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, sizeof(req), &req);
}

Contributors
Person Tokens Prop Commits CommitProp
Marcel Holtmann 62 77.50% 1 12.50%
Gustavo Fernando Padovan 14 17.50% 5 62.50%
Andrei Emeltchenko 4 5.00% 2 25.00%
Total 80 100.00% 8 100.00%



static void l2cap_send_create_chan_req(struct l2cap_chan *chan, u8 amp_id)
{
	struct l2cap_create_chan_req req;
	req.scid = cpu_to_le16(chan->scid);
	req.psm  = chan->psm;
	req.amp_id = amp_id;

	chan->ident = l2cap_get_ident(chan->conn);

	l2cap_send_cmd(chan->conn, chan->ident, L2CAP_CREATE_CHAN_REQ,
		       sizeof(req), &req);
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 75 100.00% 1 100.00%
Total 75 100.00% 1 100.00%



static void l2cap_move_setup(struct l2cap_chan *chan)
{
	struct sk_buff *skb;

	BT_DBG("chan %p", chan);

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

	__clear_retrans_timer(chan);
	__clear_monitor_timer(chan);
	__clear_ack_timer(chan);

	chan->retry_count = 0;
	skb_queue_walk(&chan->tx_q, skb) {
		if (bt_cb(skb)->l2cap.retries)
			bt_cb(skb)->l2cap.retries = 1;
		else
			break;
	}

	chan->expected_tx_seq = chan->buffer_seq;

	clear_bit(CONN_REJ_ACT, &chan->conn_state);
	clear_bit(CONN_SREJ_ACT, &chan->conn_state);
	l2cap_seq_list_clear(&chan->retrans_list);
	l2cap_seq_list_clear(&chan->srej_list);
	skb_queue_purge(&chan->srej_q);

	chan->tx_state = L2CAP_TX_STATE_XMIT;
	chan->rx_state = L2CAP_RX_STATE_MOVE;

	set_bit(CONN_REMOTE_BUSY, &chan->conn_state);
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 157 98.74% 1 50.00%
Johan Hedberg 2 1.26% 1 50.00%
Total 159 100.00% 2 100.00%



static void l2cap_move_done(struct l2cap_chan *chan)
{
	u8 move_role = chan->move_role;
	BT_DBG("chan %p", chan);

	chan->move_state = L2CAP_MOVE_STABLE;
	chan->move_role = L2CAP_MOVE_ROLE_NONE;

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

	switch (move_role) {
	case L2CAP_MOVE_ROLE_INITIATOR:
		l2cap_tx(chan, NULL, NULL, L2CAP_EV_EXPLICIT_POLL);
		chan->rx_state = L2CAP_RX_STATE_WAIT_F;
		break;
	case L2CAP_MOVE_ROLE_RESPONDER:
		chan->rx_state = L2CAP_RX_STATE_WAIT_P;
		break;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 83 100.00% 1 100.00%
Total 83 100.00% 1 100.00%



static void l2cap_chan_ready(struct l2cap_chan *chan)
{
	/* The channel may have already been flagged as connected in
         * case of receiving data before the L2CAP info req/rsp
         * procedure is complete.
         */
	if (chan->state == BT_CONNECTED)
		return;

	/* This clears all conf flags, including CONF_NOT_COMPLETE */
	chan->conf_state = 0;
	__clear_chan_timer(chan);

	if (chan->mode == L2CAP_MODE_LE_FLOWCTL && !chan->tx_credits)
		chan->ops->suspend(chan);

	chan->state = BT_CONNECTED;

	chan->ops->ready(chan);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 32 45.71% 3 50.00%
Vinicius Costa Gomes 29 41.43% 1 16.67%
Andrei Emeltchenko 8 11.43% 1 16.67%
Mat Martineau 1 1.43% 1 16.67%
Total 70 100.00% 6 100.00%



static void l2cap_le_connect(struct l2cap_chan *chan)
{
	struct l2cap_conn *conn = chan->conn;
	struct l2cap_le_conn_req req;

	if (test_and_set_bit(FLAG_LE_CONN_REQ_SENT, &chan->flags))
		return;

	req.psm     = chan->psm;
	req.scid    = cpu_to_le16(chan->scid);
	req.mtu     = cpu_to_le16(chan->imtu);
	req.mps     = cpu_to_le16(chan->mps);
	req.credits = cpu_to_le16(chan->rx_credits);

	chan->ident = l2cap_get_ident(conn);

	l2cap_send_cmd(conn, chan->ident, L2CAP_LE_CONN_REQ,
		       sizeof(req), &req);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 92 78.63% 4 80.00%
Andrei Emeltchenko 25 21.37% 1 20.00%
Total 117 100.00% 5 100.00%



static void l2cap_le_start(struct l2cap_chan *chan)
{
	struct l2cap_conn *conn = chan->conn;

	if (!smp_conn_security(conn->hcon, chan->sec_level))
		return;

	if (!chan->psm) {
		l2cap_chan_ready(chan);
		return;
	}

	if (chan->state == BT_CONNECT)
		l2cap_le_connect(chan);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 63 100.00% 2 100.00%
Total 63 100.00% 2 100.00%



static void l2cap_start_connection(struct l2cap_chan *chan)
{
	if (__amp_capable(chan)) {
		BT_DBG("chan %p AMP capable: discover AMPs", chan);
		a2mp_discover_amp(chan);
	} else if (chan->conn->hcon->type == LE_LINK) {
		l2cap_le_start(chan);
	} else {
		l2cap_send_conn_req(chan);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 60 100.00% 2 100.00%
Total 60 100.00% 2 100.00%



static void l2cap_request_info(struct l2cap_conn *conn)
{
	struct l2cap_info_req req;

	if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT)
		return;

	req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK);

	conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT;
	conn->info_ident = l2cap_get_ident(conn);

	schedule_delayed_work(&conn->info_timer, L2CAP_INFO_TIMEOUT);

	l2cap_send_cmd(conn, conn->info_ident, L2CAP_INFO_REQ,
		       sizeof(req), &req);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 77 100.00% 1 100.00%
Total 77 100.00% 1 100.00%



static void l2cap_do_start(struct l2cap_chan *chan)
{
	struct l2cap_conn *conn = chan->conn;

	if (conn->hcon->type == LE_LINK) {
		l2cap_le_start(chan);
		return;
	}

	if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT)) {
		l2cap_request_info(conn);
		return;
	}

	if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE))
		return;

	if (l2cap_chan_check_security(chan, true) &&
	    __l2cap_no_conn_pending(chan))
		l2cap_start_connection(chan);
}

Contributors
Person Tokens Prop Commits CommitProp
Andrei Emeltchenko 57 64.77% 2 28.57%
Vinicius Costa Gomes 17 19.32% 1 14.29%
Johan Hedberg 13 14.77% 3 42.86%
Marcel Holtmann 1 1.14% 1 14.29%
Total 88 100.00% 7 100.00%



static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask)
{
	u32 local_feat_mask = l2cap_feat_mask;
	if (!disable_ertm)
		local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING;

	switch (mode) {
	case L2CAP_MODE_ERTM:
		return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask;
	case L2CAP_MODE_STREAMING:
		return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask;
	default:
		return 0x00;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 59 100.00% 2 100.00%
Total 59 100.00% 2 100.00%



static void l2cap_send_disconn_req(struct l2cap_chan *chan, int err)
{
	struct l2cap_conn *conn = chan->conn;
	struct l2cap_disconn_req req;

	if (!conn)
		return;

	if (chan->mode == L2CAP_MODE_ERTM && chan->state == BT_CONNECTED) {
		__clear_retrans_timer(chan);
		__clear_monitor_timer(chan);
		__clear_ack_timer(chan);
	}

	if (chan->scid == L2CAP_CID_A2MP) {
		l2cap_state_change(chan, BT_DISCONN);
		return;
	}

	req.dcid = cpu_to_le16(chan->dcid);
	req.scid = cpu_to_le16(chan->scid);
	l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_DISCONN_REQ,
		       sizeof(req), &req);

	l2cap_state_change_and_error(chan, BT_DISCONN, err);
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 99 74.44% 11 68.75%
Andrei Emeltchenko 32 24.06% 4 25.00%
Johan Hedberg 2 1.50% 1 6.25%
Total 133 100.00% 16 100.00%

/* ---- L2CAP connections ---- */


static void l2cap_conn_start(struct l2cap_conn *conn)
{
	struct l2cap_chan *chan, *tmp;

	BT_DBG("conn %p", conn);

	mutex_lock(&conn->chan_lock);

	list_for_each_entry_safe(chan, tmp, &conn->chan_l, list) {
		l2cap_chan_lock(chan);

		if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
			l2cap_chan_ready(chan);
			l2cap_chan_unlock(chan);
			continue;
		}

		if (chan->state == BT_CONNECT) {
			if (!l2cap_chan_check_security(chan, true) ||
			    !__l2cap_no_conn_pending(chan)) {
				l2cap_chan_unlock(chan);
				continue;
			}

			if (!l2cap_mode_supported(chan->mode, conn->feat_mask)
			    && test_bit(CONF_STATE2_DEVICE,
					&chan->conf_state)) {
				l2cap_chan_close(chan, ECONNRESET);
				l2cap_chan_unlock(chan);
				continue;
			}

			l2cap_start_connection(chan);

		} else if (chan->state == BT_CONNECT2) {
			struct l2cap_conn_rsp rsp;
			char buf[128];
			rsp.scid = cpu_to_le16(chan->dcid);
			rsp.dcid = cpu_to_le16(chan->scid);

			if (l2cap_chan_check_security(chan, false)) {
				if (test_bit(FLAG_DEFER_SETUP, &chan->flags)) {
					rsp.result = cpu_to_le16(L2CAP_CR_PEND);
					rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND);
					chan->ops->defer(chan);

				} else {
					l2cap_state_change(chan, BT_CONFIG);
					rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS);
					rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
				}
			} else {
				rsp.result = cpu_to_le16(L2CAP_CR_PEND);
				rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND);
			}

			l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP,
				       sizeof(rsp), &rsp);

			if (test_bit(CONF_REQ_SENT, &chan->conf_state) ||
			    rsp.result != L2CAP_CR_SUCCESS) {
				l2cap_chan_unlock(chan);
				continue;
			}

			set_bit(CONF_REQ_SENT, &chan->conf_state);
			l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
				       l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
			chan->num_conf_req++;
		}

		l2cap_chan_unlock(chan);
	}

	mutex_unlock(&conn->chan_lock);
}

Contributors
Person Tokens Prop Commits CommitProp
Marcel Holtmann 184 46.82% 4 11.76%
Gustavo Fernando Padovan 153 38.93% 22 64.71%
Andrei Emeltchenko 36 9.16% 4 11.76%
Johan Hedberg 9 2.29% 2 5.88%
Joe Perches 6 1.53% 1 2.94%
Ben Seri 5 1.27% 1 2.94%
Total 393 100.00% 34 100.00%



static void l2cap_le_conn_ready(struct l2cap_conn *conn)
{
	struct hci_conn *hcon = conn->hcon;
	struct hci_dev *hdev = hcon->hdev;

	BT_DBG("%s conn %p", hdev->name, conn);

	/* For outgoing pairing which doesn't necessarily have an
         * associated socket (e.g. mgmt_pair_device).
         */
	if (hcon->out)
		smp_conn_security(hcon, hcon->pending_sec_level);

	/* For LE slave connections, make sure the connection interval
         * is in the range of the minium and maximum interval that has
         * been configured for this connection. If not, then trigger
         * the connection update procedure.
         */
	if (hcon->role == HCI_ROLE_SLAVE &&
	    (hcon->le_conn_interval < hcon->le_conn_min_interval ||
	     hcon->le_conn_interval > hcon->le_conn_max_interval)) {
		struct l2cap_conn_param_update_req req;

		req.min = cpu_to_le16(hcon->le_conn_min_interval);
		req.max = cpu_to_le16(hcon->le_conn_max_interval);
		req.latency = cpu_to_le16(hcon->le_conn_latency);
		req.to_multiplier = cpu_to_le16(hcon->le_supv_timeout);

		l2cap_send_cmd(conn, l2cap_get_ident(conn),
			       L2CAP_CONN_PARAM_UPDATE_REQ, sizeof(req), &req);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Marcel Holtmann 111 72.55% 3 33.33%
Johan Hedberg 22 14.38% 4 44.44%
Ville Tervo 19 12.42% 1 11.11%
Ido Yariv 1 0.65% 1 11.11%
Total 153 100.00% 9 100.00%



static void l2cap_conn_ready(struct l2cap_conn *conn)
{
	struct l2cap_chan *chan;
	struct hci_conn *hcon = conn->hcon;

	BT_DBG("conn %p", conn);

	if (hcon->type == ACL_LINK)
		l2cap_request_info(conn);

	mutex_lock(&conn->chan_lock);

	list_for_each_entry(chan, &conn->chan_l, list) {

		l2cap_chan_lock(chan);

		if (chan->scid == L2CAP_CID_A2MP) {
			l2cap_chan_unlock(chan);
			continue;
		}

		if (hcon->type == LE_LINK) {
			l2cap_le_start(chan);
		} else if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
			if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)
				l2cap_chan_ready(chan);
		} else if (chan->state == BT_CONNECT) {
			l2cap_do_start(chan);
		}

		l2cap_chan_unlock(chan);
	}

	mutex_unlock(&conn->chan_lock);

	if (hcon->type == LE_LINK)
		l2cap_le_conn_ready(conn);

	queue_work(hcon->hdev->workqueue, &conn->pending_rx_work);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 51 28.49% 5 21.74%
Marcel Holtmann 47 26.26% 2 8.70%
Andrei Emeltchenko 36 20.11% 4 17.39%
Gustavo Fernando Padovan 22 12.29% 8 34.78%
Vinicius Costa Gomes 12 6.70% 2 8.70%
Ville Tervo 8 4.47% 1 4.35%
Anderson Briglia 3 1.68% 1 4.35%
Total 179 100.00% 23 100.00%

/* Notify sockets that we cannot guaranty reliability anymore */


static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err)
{
	struct l2cap_chan *chan;

	BT_DBG("conn %p", conn);

	mutex_lock(&conn->chan_lock);

	list_for_each_entry(chan, &conn->chan_l, list) {
		if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags))
			l2cap_chan_set_err(chan, err);
	}

	mutex_unlock(&conn->chan_lock);
}

Contributors
Person Tokens Prop Commits CommitProp
Marcel Holtmann 34 47.89% 1 12.50%
Andrei Emeltchenko 26 36.62% 3 37.50%
Gustavo Fernando Padovan 11 15.49% 4 50.00%
Total 71 100.00% 8 100.00%



static void l2cap_info_timeout(struct work_struct *work)
{
	struct l2cap_conn *conn = container_of(work, struct l2cap_conn,
					       info_timer.work);

	conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
	conn->info_ident = 0;

	l2cap_conn_start(conn);
}

Contributors
Person Tokens Prop Commits CommitProp
Marcel Holtmann 30 66.67% 3 60.00%
Gustavo Fernando Padovan 15 33.33% 2 40.00%
Total 45 100.00% 5 100.00%

/*
 * l2cap_user
 * External modules can register l2cap_user objects on l2cap_conn. The ->probe
 * callback is called during registration. The ->remove callback is called
 * during unregistration.
 * An l2cap_user object can either be explicitly unregistered or when the
 * underlying l2cap_conn object is deleted. This guarantees that l2cap->hcon,
 * l2cap->hchan, .. are valid as long as the remove callback hasn't been called.
 * External modules must own a reference to the l2cap_conn object if they intend
 * to call l2cap_unregister_user(). The l2cap_conn object might get destroyed at
 * any time if they don't.
 */



int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user)
{
	struct hci_dev *hdev = conn->hcon->hdev;
	int ret;

	/* We need to check whether l2cap_conn is registered. If it is not, we
         * must not register the l2cap_user. l2cap_conn_del() is unregisters
         * l2cap_conn objects, but doesn't provide its own locking. Instead, it
         * relies on the parent hci_conn object to be locked. This itself relies
         * on the hci_dev object to be locked. So we must lock the hci device
         * here, too. */

	hci_dev_lock(hdev);

	if (!list_empty(&user->list)) {
		ret = -EINVAL;
		goto out_unlock;
	}

	/* conn->hchan is NULL after l2cap_conn_del() was called */
	if (!conn->hchan) {
		ret = -ENODEV;
		goto out_unlock;
	}

	ret = user->probe(conn, user);
	if (ret)
		goto out_unlock;

	list_add(&user->list, &conn->users);
	ret = 0;

out_unlock:
	hci_dev_unlock(hdev);
	return ret;
}
Contributors
Person Tokens Prop Commits CommitProp
David Herrmann 114 95.80% 1 50.00%
Alexey Dobriyan 5 4.20% 1 50.00%
Total 119 100.00% 2 100.00%


EXPORT_SYMBOL(l2cap_register_user);



void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user)
{
	struct hci_dev *hdev = conn->hcon->hdev;

	hci_dev_lock(hdev);

	if (list_empty(&user->list))
		goto out_unlock;

	list_del_init(&user->list);
	user->remove(conn, user);

out_unlock:
	hci_dev_unlock(hdev);
}
Contributors
Person Tokens Prop Commits CommitProp
David Herrmann 63 92.65% 1 33.33%
Alexey Dobriyan 4 5.88% 1 33.33%
Tedd Ho-Jeong An 1 1.47% 1 33.33%
Total 68 100.00% 3 100.00%


EXPORT_SYMBOL(l2cap_unregister_user);



static void l2cap_unregister_all_users(struct l2cap_conn *conn)
{
	struct l2cap_user *user;

	while (!list_empty(&conn->users)) {
		user = list_first_entry(&conn->users, struct l2cap_user, list);
		list_del_init(&user->list);
		user->remove(conn, user);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
David Herrmann 60 98.36% 1 50.00%
Tedd Ho-Jeong An 1 1.64% 1 50.00%
Total 61 100.00% 2 100.00%



static void l2cap_conn_del(struct hci_conn *hcon, int err)
{
	struct l2cap_conn *conn = hcon->l2cap_data;
	struct l2cap_chan *chan, *l;

	if (!conn)
		return;

	BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);

	kfree_skb(conn->rx_skb);

	skb_queue_purge(&conn->pending_rx);

	/* We can not call flush_work(&conn->pending_rx_work) here since we
         * might block if we are running on a worker from the same workqueue
         * pending_rx_work is waiting on.
         */
	if (work_pending(&conn->pending_rx_work))
		cancel_work_sync(&conn->pending_rx_work);

	if (work_pending(&conn->id_addr_update_work))
		cancel_work_sync(&conn->id_addr_update_work);

	l2cap_unregister_all_users(conn);

	/* Force the connection to be immediately dropped */
	hcon->disc_timeout = 0;

	mutex_lock(&conn->chan_lock);

	/* Kill channels */
	list_for_each_entry_safe(chan, l, &conn->chan_l, list) {
		l2cap_chan_hold(chan);
		l2cap_chan_lock(chan);

		l2cap_chan_del(chan, err);

		l2cap_chan_unlock(chan);

		chan->ops->close(chan);
		l2cap_chan_put(chan);
	}

	mutex_unlock(&conn->chan_lock);

	hci_chan_del(conn->hchan);

	if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT)
		cancel_delayed_work_sync(&conn->info_timer);

	hcon->l2cap_data = NULL;
	conn->hchan = NULL;
	l2cap_conn_put(conn);
}

Contributors
Person Tokens Prop Commits CommitProp
Vinicius Costa Gomes 115 53.00% 1 8.33%
Johan Hedberg 40 18.43% 3 25.00%
Andrei Emeltchenko 20 9.22% 2 16.67%
Jukka Taimisto 12 5.53% 1 8.33%
David Herrmann 12 5.53% 2 16.67%
Mat Martineau 10 4.61% 1 8.33%
Luiz Augusto von Dentz 7 3.23% 1 8.33%
Ulisses Furquim 1 0.46% 1 8.33%
Total 217 100.00% 12 100.00%



static void l2cap_conn_free(struct kref *ref)
{
	struct l2cap_conn *conn = container_of(ref, struct l2cap_conn, ref);

	hci_conn_put(conn->hcon);
	kfree(conn);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 17 44.74% 1 20.00%
Marcel Holtmann 9 23.68% 1 20.00%
Linus Torvalds 7 18.42% 1 20.00%
Luiz Augusto von Dentz 4 10.53% 1 20.00%
Maksim Krasnyanskiy 1 2.63% 1 20.00%
Total 38 100.00% 5 100.00%



struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn)
{
	kref_get(&conn->ref);
	return conn;
}
Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 16 69.57% 2 66.67%
David Herrmann 7 30.43% 1 33.33%
Total 23 100.00% 3 100.00%


EXPORT_SYMBOL(l2cap_conn_get);



void l2cap_conn_put(struct l2cap_conn *conn)
{
	kref_put(&conn->ref, l2cap_conn_free);
}
Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 14 70.00% 1 33.33%
David Herrmann 5 25.00% 1 33.33%
Marcel Holtmann 1 5.00% 1 33.33%
Total 20 100.00% 3 100.00%


EXPORT_SYMBOL(l2cap_conn_put);

/* ---- Socket interface ---- */

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


static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm,
						   bdaddr_t *src,
						   bdaddr_t *dst,
						   u8 link_type)
{
	struct l2cap_chan *c, *c1 = NULL;

	read_lock(&chan_list_lock);

	list_for_each_entry(c, &chan_list, global_l) {
		if (state && c->state != state)
			continue;

		if (link_type == ACL_LINK && c->src_type != BDADDR_BREDR)
			continue;

		if (link_type == LE_LINK && c->src_type == BDADDR_BREDR)
			continue;

		if (c->psm == psm) {
			int src_match, dst_match;
			int src_any, dst_any;

			/* Exact match. */
			src_match = !bacmp(&c->src, src);
			dst_match = !bacmp(&c->dst, dst);
			if (src_match && dst_match) {
				l2cap_chan_hold(c);
				read_unlock(&chan_list_lock);
				return c;
			}

			/* Closest match */
			src_any = !bacmp(&c->src, BDADDR_ANY);
			dst_any = !bacmp(&c->dst, BDADDR_ANY);
			if ((src_match && dst_any) || (src_any && dst_match) ||
			    (src_any && dst_any))
				c1 = c;
		}
	}

	if (c1)
		l2cap_chan_hold(c1);

	read_unlock(&chan_list_lock);

	return c1;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 175 77.43% 2 12.50%
Marcel Holtmann 14 6.19% 3 18.75%
Andrei Emeltchenko 8 3.54% 2 12.50%
Ville Tervo 8 3.54% 2 12.50%
Linus Torvalds 6 2.65% 1 6.25%
David Herrmann 5 2.21% 1 6.25%
Vinicius Costa Gomes 3 1.33% 1 6.25%
Gustavo Fernando Padovan 3 1.33% 1 6.25%
Thomas Gleixner 2 0.88% 1 6.25%
Luiz Augusto von Dentz 1 0.44% 1 6.25%
Pavel Emelyanov 1 0.44% 1 6.25%
Total 226 100.00% 16 100.00%



static void l2cap_monitor_timeout(struct work_struct *work)
{
	struct l2cap_chan *chan = container_of(work, struct l2cap_chan,
					       monitor_timer.work);

	BT_DBG("chan %p", chan);

	l2cap_chan_lock(chan);

	if (!chan->conn) {
		l2cap_chan_unlock(chan);
		l2cap_chan_put(chan);
		return;
	}

	l2cap_tx(chan, NULL, NULL, L2CAP_EV_MONITOR_TO);

	l2cap_chan_unlock(chan);
	l2cap_chan_put(chan);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 56 69.14% 1 50.00%
David Herrmann 25 30.86% 1 50.00%
Total 81 100.00% 2 100.00%



static void l2cap_retrans_timeout(struct work_struct *work)
{
	struct l2cap_chan *chan = container_of(work, struct l2cap_chan,
					       retrans_timer.work);

	BT_DBG("chan %p", chan);

	l2cap_chan_lock(chan);

	if (!chan->conn) {
		l2cap_chan_unlock(chan);
		l2cap_chan_put(chan);
		return;
	}

	l2cap_tx(chan, NULL, NULL, L2CAP_EV_RETRANS_TO);
	l2cap_chan_unlock(chan);
	l2cap_chan_put(chan);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 61 75.31% 1 50.00%
David Herrmann 20 24.69% 1 50.00%
Total 81 100.00% 2 100.00%



static void l2cap_streaming_send(struct l2cap_chan *chan,
				 struct sk_buff_head *skbs)
{
	struct sk_buff *skb;
	struct l2cap_ctrl *control;

	BT_DBG("chan %p, skbs %p", chan, skbs);

	if (__chan_is_moving(chan))
		return;

	skb_queue_splice_tail_init(skbs, &chan->tx_q);

	while (!skb_queue_empty(&chan->tx_q)) {

		skb = skb_dequeue(&chan->tx_q);

		bt_cb(skb)->l2cap.retries = 1;
		control = &bt_cb(skb)->l2cap;

		control->reqseq = 0;
		control->txseq = chan->next_tx_seq;

		__pack_control(chan, control, skb);

		if (chan->fcs == L2CAP_FCS_CRC16) {
			u16 fcs = crc16(0, (u8 *) skb->data, skb->len);
			put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE));
		}

		l2cap_do_send(chan, skb);

		BT_DBG("Sent txseq %u", control->txseq);

		chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq);
		chan->frames_sent++;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 145 73.98% 4 40.00%
Maksim Krasnyanskiy 21 10.71% 2 20.00%
Ido Yariv 19 9.69% 1 10.00%
Gustavo Fernando Padovan 6 3.06% 1 10.00%
Marcel Holtmann 3 1.53% 1 10.00%
Linus Torvalds 2 1.02% 1 10.00%
Total 196 100.00% 10 100.00%



static int l2cap_ertm_send(struct l2cap_chan *chan)
{
	struct sk_buff *skb, *tx_skb;
	struct l2cap_ctrl *control;
	int sent = 0;

	BT_DBG("chan %p", chan);

	if (chan->state != BT_CONNECTED)
		return -ENOTCONN;

	if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state))
		return 0;

	if (__chan_is_moving(chan))
		return 0;

	while (chan->tx_send_head &&
	       chan->unacked_frames < chan->remote_tx_win &&
	       chan->tx_state == L2CAP_TX_STATE_XMIT) {

		skb = chan->tx_send_head;

		bt_cb(skb)->l2cap.retries = 1;
		control = &bt_cb(skb)->l2cap;

		if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state))
			control->final = 1;

		control->reqseq = chan->buffer_seq;
		chan->last_acked_seq = chan->buffer_seq;
		control->txseq = chan->next_tx_seq;

		__pack_control(chan, control, skb);

		if (chan->fcs == L2CAP_FCS_CRC16) {
			u16 fcs = crc16(0, (u8 *) skb->data, skb->len);
			put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE));
		}

		/* Clone after data has been modified. Data is assumed to be
                   read-only (for locking purposes) on cloned sk_buffs.
                 */
		tx_skb = skb_clone(skb, GFP_KERNEL);

		if (!tx_skb)
			break;

		__set_retrans_timer(chan);

		chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq);
		chan->unacked_frames++;
		chan->frames_sent++;
		sent++;

		if (skb_queue_is_last(&chan->tx_q, skb))
			chan->tx_send_head = NULL;
		else
			chan->tx_send_head = skb_queue_next(&chan->tx_q, skb);

		l2cap_do_send(chan, tx_skb);
		BT_DBG("Sent txseq %u", control->txseq);
	}

	BT_DBG("Sent %d, %u unacked, %u in ERTM queue", sent,
	       chan->unacked_frames, skb_queue_len(&chan->tx_q));

	return sent;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 200 60.06% 5 18.52%
Gustavo Fernando Padovan 57 17.12% 9 33.33%
Marcel Holtmann 30 9.01% 6 22.22%
Linus Torvalds 16 4.80% 1 3.70%
Ville Tervo 14 4.20% 2 7.41%
Maksim Krasnyanskiy 7 2.10% 2 7.41%
Andrei Emeltchenko 6 1.80% 1 3.70%
Vinicius Costa Gomes 3 0.90% 1 3.70%
Total 333 100.00% 27 100.00%



static void l2cap_ertm_resend(struct l2cap_chan *chan)
{
	struct l2cap_ctrl control;
	struct sk_buff *skb;
	struct sk_buff *tx_skb;
	u16 seq;

	BT_DBG("chan %p", chan);

	if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state))
		return;

	if (__chan_is_moving(chan))
		return;

	while (chan->retrans_list.head != L2CAP_SEQ_LIST_CLEAR) {
		seq = l2cap_seq_list_pop(&chan->retrans_list);

		skb = l2cap_ertm_seq_in_queue(&chan->tx_q, seq);
		if (!skb) {
			BT_DBG("Error: Can't retransmit seq %d, frame missing",
			       seq);
			continue;
		}

		bt_cb(skb)->l2cap.retries++;
		control = bt_cb(skb)->l2cap;

		if (chan->max_tx != 0 &&
		    bt_cb(skb)->l2cap.retries > chan->max_tx) {
			BT_DBG("Retry limit exceeded (%d)", chan->max_tx);
			l2cap_send_disconn_req(chan, ECONNRESET);
			l2cap_seq_list_clear(&chan->retrans_list);
			break;
		}

		control.reqseq = chan->buffer_seq;
		if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state))
			control.final = 1;
		else
			control.final = 0;

		if (skb_cloned(skb)) {
			/* Cloned sk_buffs are read-only, so we need a
                         * writeable copy
                         */
			tx_skb = skb_copy(skb, GFP_KERNEL);
		} else {
			tx_skb = skb_clone(skb, GFP_KERNEL);
		}

		if (!tx_skb) {
			l2cap_seq_list_clear(&chan->retrans_list);
			break;
		}

		/* Update skb contents */
		if (test_bit(FLAG_EXT_CTRL, &chan->flags)) {
			put_unaligned_le32(__pack_extended_control(&control),
					   tx_skb->data + L2CAP_HDR_SIZE);
		} else {
			put_unaligned_le16(__pack_enhanced_control(&control),
					   tx_skb->data + L2CAP_HDR_SIZE);
		}

		/* Update FCS */
		if (chan->fcs == L2CAP_FCS_CRC16) {
			u16 fcs = crc16(0, (u8 *) tx_skb->data,
					tx_skb->len - L2CAP_FCS_SIZE);
			put_unaligned_le16(fcs, skb_tail_pointer(tx_skb) -
						L2CAP_FCS_SIZE);
		}

		l2cap_do_send(chan, tx_skb);

		BT_DBG("Resent txseq %d", control.txseq);

		chan->last_acked_seq = chan->buffer_seq;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 218 59.08% 3 10.00%
Gustavo Fernando Padovan 87 23.58% 16 53.33%
Mat Martineau 28 7.59% 3 10.00%
Andrei Emeltchenko 22 5.96% 4 13.33%
Lukasz Rymanowski 6 1.63% 1 3.33%
Maksim Krasnyanskiy 5 1.36% 1 3.33%
Marcel Holtmann 2 0.54% 1 3.33%
Ville Tervo 1 0.27% 1 3.33%
Total 369 100.00% 30 100.00%



static void l2cap_retransmit(struct l2cap_chan *chan,
			     struct l2cap_ctrl *control)
{
	BT_DBG("chan %p, control %p", chan, control);

	l2cap_seq_list_append(&chan->retrans_list, control->reqseq);
	l2cap_ertm_resend(chan);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 32 76.19% 1 20.00%
Gustavo Fernando Padovan 4 9.52% 2 40.00%
Andrei Emeltchenko 4 9.52% 1 20.00%
Mat Martineau 2 4.76% 1 20.00%
Total 42 100.00% 5 100.00%



static void l2cap_retransmit_all(struct l2cap_chan *chan,
				 struct l2cap_ctrl *control)
{
	struct sk_buff *skb;

	BT_DBG("chan %p, control %p", chan, control);

	if (control->poll)
		set_bit(CONN_SEND_FBIT, &chan->conn_state);

	l2cap_seq_list_clear(&chan->retrans_list);

	if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state))
		return;

	if (chan->unacked_frames) {
		skb_queue_walk(&chan->tx_q, skb) {
			if (bt_cb(skb)->l2cap.txseq == control->reqseq ||
			    skb == chan->tx_send_head)
				break;
		}

		skb_queue_walk_from(&chan->tx_q, skb) {
			if (skb == chan->tx_send_head)
				break;

			l2cap_seq_list_append(&chan->retrans_list,
					      bt_cb(skb)->l2cap.txseq);
		}

		l2cap_ertm_resend(chan);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 87 60.42% 2 16.67%
Gustavo Fernando Padovan 40 27.78% 7 58.33%
Mat Martineau 17 11.81% 3 25.00%
Total 144 100.00% 12 100.00%



static void l2cap_send_ack(struct l2cap_chan *chan)
{
	struct l2cap_ctrl control;
	u16 frames_to_ack = __seq_offset(chan, chan->buffer_seq,
					 chan->last_acked_seq);
	int threshold;

	BT_DBG("chan %p last_acked_seq %d buffer_seq %d",
	       chan, chan->last_acked_seq, chan->buffer_seq);

	memset(&control, 0, sizeof(control));
	control.sframe = 1;

	if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state) &&
	    chan->rx_state == L2CAP_RX_STATE_RECV) {
		__clear_ack_timer(chan);
		control.super = L2CAP_SUPER_RNR;
		control.reqseq = chan->buffer_seq;
		l2cap_send_sframe(chan, &control);
	} else {
		if (!test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) {
			l2cap_ertm_send(chan);
			/* If any i-frames were sent, they included an ack */
			if (chan->buffer_seq == chan->last_acked_seq)
				frames_to_ack = 0;
		}

		/* Ack now if the window is 3/4ths full.
                 * Calculate without mul or div
                 */
		threshold = chan->ack_win;
		threshold += threshold << 1;
		threshold >>= 2;

		BT_DBG("frames_to_ack %u, threshold %d", frames_to_ack,
		       threshold);

		if (frames_to_ack >= threshold) {
			__clear_ack_timer(chan);
			control.super = L2CAP_SUPER_RR;
			control.reqseq = chan->buffer_seq;
			l2cap_send_sframe(chan, &control);
			frames_to_ack = 0;
		}

		if (frames_to_ack)
			__set_ack_timer(chan);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 154 67.84% 1 5.26%
Gustavo Fernando Padovan 51 22.47% 11 57.89%
Mat Martineau 18 7.93% 3 15.79%
Andrei Emeltchenko 3 1.32% 3 15.79%
Maksim Krasnyanskiy 1 0.44% 1 5.26%
Total 227 100.00% 19 100.00%



static inline int l2cap_skbuff_fromiovec(struct l2cap_chan *chan,
					 struct msghdr *msg, int len,
					 int count, struct sk_buff *skb)
{
	struct l2cap_conn *conn = chan->conn;
	struct sk_buff **frag;
	int sent = 0;

	if (!copy_from_iter_full(skb_put(skb, count), count, &msg->msg_iter))
		return -EFAULT;

	sent += count;
	len  -= count;

	/* Continuation fragments (no L2CAP header) */
	frag = &skb_shinfo(skb)->frag_list;
	while (len) {
		struct sk_buff *tmp;

		count = min_t(unsigned int, conn->mtu, len);

		tmp = chan->ops->alloc_skb(chan, 0, count,
					   msg->msg_flags & MSG_DONTWAIT);
		if (IS_ERR(tmp))
			return PTR_ERR(tmp);

		*frag = tmp;

		if (!copy_from_iter_full(skb_put(*frag, count), count,
				   &msg->msg_iter))
			return -EFAULT;

		sent += count;
		len  -= count;

		skb->len += (*frag)->len;
		skb->data_len += (*frag)->len;

		frag = &(*frag)->next;
	}

	return sent;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 155 70.45% 1 16.67%
Mat Martineau 53 24.09% 2 33.33%
Al Viro 10 4.55% 2 33.33%
Marcel Holtmann 2 0.91% 1 16.67%
Total 220 100.00% 6 100.00%



static struct sk_buff *l2cap_create_connless_pdu(struct l2cap_chan *chan,
						 struct msghdr *msg, size_t len)
{
	struct l2cap_conn *conn = chan->conn;
	struct sk_buff *skb;
	int err, count, hlen = L2CAP_HDR_SIZE + L2CAP_PSMLEN_SIZE;
	struct l2cap_hdr *lh;

	BT_DBG("chan %p psm 0x%2.2x len %zu", chan,
	       __le16_to_cpu(chan->psm), len);

	count = min_t(unsigned int, (conn->mtu - hlen), len);

	skb = chan->ops->alloc_skb(chan, hlen, count,
				   msg->msg_flags & MSG_DONTWAIT);
	if (IS_ERR(skb))
		return skb;

	/* Create L2CAP header */
	lh = skb_put(skb, L2CAP_HDR_SIZE);
	lh->cid = cpu_to_le16(chan->dcid);
	lh->len = cpu_to_le16(len + L2CAP_PSMLEN_SIZE);
	put_unaligned(chan->psm, (__le16 *) skb_put(skb, L2CAP_PSMLEN_SIZE));

	err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb);
	if (unlikely(err < 0)) {
		kfree_skb(skb);
		return ERR_PTR(err);
	}
	return skb;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 129 64.82% 1 25.00%
Mat Martineau 67 33.67% 1 25.00%
Marcel Holtmann 3 1.51% 2 50.00%
Total 199 100.00% 4 100.00%



static struct sk_buff *l2cap_create_basic_pdu(struct l2cap_chan *chan,
					      struct msghdr *msg, size_t len)
{
	struct l2cap_conn *conn = chan->conn;
	struct sk_buff *skb;
	int err, count;
	struct l2cap_hdr *lh;

	BT_DBG("chan %p len %zu", chan, len);

	count = min_t(unsigned int, (conn->mtu - L2CAP_HDR_SIZE), len);

	skb = chan->ops->alloc_skb(chan, L2CAP_HDR_SIZE, count,
				   msg->msg_flags & MSG_DONTWAIT);
	if (IS_ERR(skb))
		return skb;

	/* Create L2CAP header */
	lh = skb_put(skb, L2CAP_HDR_SIZE);
	lh->cid = cpu_to_le16(chan->dcid);
	lh->len = cpu_to_le16(len);

	err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb);
	if (unlikely(err < 0)) {
		kfree_skb(skb);
		return ERR_PTR(err);
	}
	return skb;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 135 81.33% 1 33.33%
Mat Martineau 29 17.47% 1 33.33%
Marcel Holtmann 2 1.20% 1 33.33%
Total 166 100.00% 3 100.00%



static struct sk_buff *l2cap_create_iframe_pdu(struct l2cap_chan *chan,
					       struct msghdr *msg, size_t len,
					       u16 sdulen)
{
	struct l2cap_conn *conn = chan->conn;
	struct sk_buff *skb;
	int err, count, hlen;
	struct l2cap_hdr *lh;

	BT_DBG("chan %p len %zu", chan, len);

	if (!conn)
		return ERR_PTR(-ENOTCONN);

	hlen = __ertm_hdr_size(chan);

	if (sdulen)
		hlen += L2CAP_SDULEN_SIZE;

	if (chan->fcs == L2CAP_FCS_CRC16)
		hlen += L2CAP_FCS_SIZE;

	count = min_t(unsigned int, (conn->mtu - hlen), len);

	skb = chan->ops->alloc_skb(chan, hlen, count,
				   msg->msg_flags & MSG_DONTWAIT);
	if (IS_ERR(skb))
		return skb;

	/* Create L2CAP header */
	lh = skb_put(skb, L2CAP_HDR_SIZE);
	lh->cid = cpu_to_le16(chan->dcid);
	lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE));

	/* Control header is populated later */
	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
		put_unaligned_le32(0, skb_put(skb, L2CAP_EXT_CTRL_SIZE));
	else
		put_unaligned_le16(0, skb_put(skb, L2CAP_ENH_CTRL_SIZE));

	if (sdulen)
		put_unaligned_le16(sdulen, skb_put(skb, L2CAP_SDULEN_SIZE));

	err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb);
	if (unlikely(err < 0)) {
		kfree_skb(skb);
		return ERR_PTR(err);
	}

	bt_cb(skb)->l2cap.fcs = chan->fcs;
	bt_cb(skb)->l2cap.retries = 0;
	return skb;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 185 62.93% 2 16.67%
Mat Martineau 84 28.57% 3 25.00%
Gustavo Fernando Padovan 16 5.44% 4 33.33%
Andrei Emeltchenko 7 2.38% 2 16.67%
Marcel Holtmann 2 0.68% 1 8.33%
Total 294 100.00% 12 100.00%



static int l2cap_segment_sdu(struct l2cap_chan *chan,
			     struct sk_buff_head *seg_queue,
			     struct msghdr *msg, size_t len)
{
	struct sk_buff *skb;
	u16 sdu_len;
	size_t pdu_len;
	u8 sar;

	BT_DBG("chan %p, msg %p, len %zu", chan, msg, len);

	/* It is critical that ERTM PDUs fit in a single HCI fragment,
         * so fragmented skbs are not used.  The HCI layer's handling
         * of fragmented skbs is not compatible with ERTM's queueing.
         */

	/* PDU size is derived from the HCI MTU */
	pdu_len = chan->conn->mtu;

	/* Constrain PDU size for BR/EDR connections */
	if (!chan->hs_hcon)
		pdu_len = min_t(size_t, pdu_len, L2CAP_BREDR_MAX_PAYLOAD);

	/* Adjust for largest possible L2CAP overhead. */
	if (chan->fcs)
		pdu_len -= L2CAP_FCS_SIZE;

	pdu_len -= __ertm_hdr_size(chan);

	/* Remote device may have requested smaller PDUs */
	pdu_len = min_t(size_t, pdu_len, chan->remote_mps);

	if (len <= pdu_len) {
		sar = L2CAP_SAR_UNSEGMENTED;
		sdu_len = 0;
		pdu_len = len;
	} else {
		sar = L2CAP_SAR_START;
		sdu_len = len;
	}

	while (len > 0) {
		skb = l2cap_create_iframe_pdu(chan, msg, pdu_len, sdu_len);

		if (IS_ERR(skb)) {
			__skb_queue_purge(seg_queue);
			return PTR_ERR(skb);
		}

		bt_cb(skb)->l2cap.sar = sar;
		__skb_queue_tail(seg_queue, skb);

		len -= pdu_len;
		if (sdu_len)
			sdu_len = 0;

		if (len <= pdu_len) {
			sar = L2CAP_SAR_END;
			pdu_len = len;
		} else {
			sar = L2CAP_SAR_CONTINUE;
		}
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 158 66.39% 2 15.38%
Gustavo Fernando Padovan 41 17.23% 6 46.15%
Marcel Holtmann 15 6.30% 1 7.69%
Mat Martineau 10 4.20% 1 7.69%
Linus Torvalds 8 3.36% 1 7.69%
Luiz Augusto von Dentz 3 1.26% 1 7.69%
Andrei Emeltchenko 3 1.26% 1 7.69%
Total 238 100.00% 13 100.00%



static struct sk_buff *l2cap_create_le_flowctl_pdu(struct l2cap_chan *chan,
						   struct msghdr *msg,
						   size_t len, u16 sdulen)
{
	struct l2cap_conn *conn = chan->conn;
	struct sk_buff *skb;
	int err, count, hlen;
	struct l2cap_hdr *lh;

	BT_DBG("chan %p len %zu", chan, len);

	if (!conn)
		return ERR_PTR(-ENOTCONN);

	hlen = L2CAP_HDR_SIZE;

	if (sdulen)
		hlen += L2CAP_SDULEN_SIZE;

	count = min_t(unsigned int, (conn->mtu - hlen), len);

	skb = chan->ops->alloc_skb(chan, hlen, count,
				   msg->msg_flags & MSG_DONTWAIT);
	if (IS_ERR(skb))
		return skb;

	/* Create L2CAP header */
	lh = skb_put(skb, L2CAP_HDR_SIZE);
	lh->cid = cpu_to_le16(chan->dcid);
	lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE));

	if (sdulen)
		put_unaligned_le16(sdulen, skb_put(skb, L2CAP_SDULEN_SIZE));

	err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb);
	if (unlikely(err < 0)) {
		kfree_skb(skb);
		return ERR_PTR(err);
	}

	return skb;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 111 51.15% 6 35.29%
Marcel Holtmann 56 25.81% 5 29.41%
Johan Hedberg 40 18.43% 1 5.88%
Andrei Emeltchenko 7 3.23% 2 11.76%
Luiz Augusto von Dentz 1 0.46% 1 5.88%
Linus Torvalds 1 0.46% 1 5.88%
Szymon Janc 1 0.46% 1 5.88%
Total 217 100.00% 17 100.00%



static int l2cap_segment_le_sdu(struct l2cap_chan *chan,
				struct sk_buff_head *seg_queue,
				struct msghdr *msg, size_t len)
{
	struct sk_buff *skb;
	size_t pdu_len;
	u16 sdu_len;

	BT_DBG("chan %p, msg %p, len %zu", chan, msg, len);

	sdu_len = len;
	pdu_len = chan->remote_mps - L2CAP_SDULEN_SIZE;

	while (len > 0) {
		if (len <= pdu_len)
			pdu_len = len;

		skb = l2cap_create_le_flowctl_pdu(chan, msg, pdu_len, sdu_len);
		if (IS_ERR(skb)) {
			__skb_queue_purge(seg_queue);
			return PTR_ERR(skb);
		}

		__skb_queue_tail(seg_queue, skb);

		len -= pdu_len;

		if (sdu_len) {
			sdu_len = 0;
			pdu_len += L2CAP_SDULEN_SIZE;
		}
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 72 52.55% 2 22.22%
Gustavo Fernando Padovan 61 44.53% 3 33.33%
Andrei Emeltchenko 3 2.19% 3 33.33%
Szymon Janc 1 0.73% 1 11.11%
Total 137 100.00% 9 100.00%



static void l2cap_le_flowctl_send(struct l2cap_chan *chan)
{
	int sent = 0;

	BT_DBG("chan %p", chan);

	while (chan->tx_credits && !skb_queue_empty(&chan->tx_q)) {
		l2cap_do_send(chan, skb_dequeue(&chan->tx_q));
		chan->tx_credits--;
		sent++;
	}

	BT_DBG("Sent %d credits %u queued %u", sent, chan->tx_credits,
	       skb_queue_len(&chan->tx_q));
}

Contributors
Person Tokens Prop Commits CommitProp
Luiz Augusto von Dentz 80 100.00% 1 100.00%
Total 80 100.00% 1 100.00%



int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len)
{
	struct sk_buff *skb;
	int err;
	struct sk_buff_head seg_queue;

	if (!chan->conn)
		return -ENOTCONN;

	/* Connectionless channel */
	if (chan->chan_type == L2CAP_CHAN_CONN_LESS) {
		skb = l2cap_create_connless_pdu(chan, msg, len);
		if (IS_ERR(skb))
			return PTR_ERR(skb);

		/* Channel lock is released before requesting new skb and then
                 * reacquired thus we need to recheck channel state.
                 */
		if (chan->state != BT_CONNECTED) {
			kfree_skb(skb);
			return -ENOTCONN;
		}

		l2cap_do_send(chan, skb);
		return len;
	}

	switch (chan->mode) {
	case L2CAP_MODE_LE_FLOWCTL:
		/* Check outgoing MTU */
		if (len > chan->omtu)
			return -EMSGSIZE;

		__skb_queue_head_init(&seg_queue);

		err = l2cap_segment_le_sdu(chan, &seg_queue, msg, len);

		if (chan->state != BT_CONNECTED) {
			__skb_queue_purge(&seg_queue);
			err = -ENOTCONN;
		}

		if (err)
			return err;

		skb_queue_splice_tail_init(&seg_queue, &chan->tx_q);

		l2cap_le_flowctl_send(chan);

		if (!chan->tx_credits)
			chan->ops->suspend(chan);

		err = len;

		break;

	case L2CAP_MODE_BASIC:
		/* Check outgoing MTU */
		if (len > chan->omtu)
			return -EMSGSIZE;

		/* Create a basic PDU */
		skb = l2cap_create_basic_pdu(chan, msg, len);
		if (IS_ERR(skb))
			return PTR_ERR(skb);

		/* Channel lock is released before requesting new skb and then
                 * reacquired thus we need to recheck channel state.
                 */
		if (chan->state != BT_CONNECTED) {
			kfree_skb(skb);
			return -ENOTCONN;
		}

		l2cap_do_send(chan, skb);
		err = len;
		break;

	case L2CAP_MODE_ERTM:
	case L2CAP_MODE_STREAMING:
		/* Check outgoing MTU */
		if (len > chan->omtu) {
			err = -EMSGSIZE;
			break;
		}

		__skb_queue_head_init(&seg_queue);

		/* Do segmentation before calling in to the state machine,
                 * since it's possible to block while waiting for memory
                 * allocation.
                 */
		err = l2cap_segment_sdu(chan, &seg_queue, msg, len);

		/* The channel could have been closed while segmenting,
                 * check that it is still connected.
                 */
		if (chan->state != BT_CONNECTED) {
			__skb_queue_purge(&seg_queue);
			err = -ENOTCONN;
		}

		if (err)
			break;

		if (chan->mode == L2CAP_MODE_ERTM)
			l2cap_tx(chan, NULL, &seg_queue, L2CAP_EV_DATA_REQUEST);
		else
			l2cap_streaming_send(chan, &seg_queue);

		err = len;

		/* If the skbs were not queued for sending, they'll still be in
                 * seg_queue and need to be purged.
                 */
		__skb_queue_purge(&seg_queue);
		break;

	default:
		BT_DBG("bad state %1.1x", chan->mode);
		err = -EBADFD;
	}

	return err;
}
Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 210 50.24% 1 4.35%
Gustavo Fernando Padovan 102 24.40% 9 39.13%
Andrzej Kaczmarek 40 9.57% 1 4.35%
Marcel Holtmann 30 7.18% 3 13.04%
Mat Martineau 24 5.74% 3 13.04%
Linus Torvalds 5 1.20% 1 4.35%
Andrei Emeltchenko 3 0.72% 3 13.04%
Maksim Krasnyanskiy 3 0.72% 1 4.35%
Luiz Augusto von Dentz 1 0.24% 1 4.35%
Total 418 100.00% 23 100.00%


EXPORT_SYMBOL_GPL(l2cap_chan_send);



static void l2cap_send_srej(struct l2cap_chan *chan, u16 txseq)
{
	struct l2cap_ctrl control;
	u16 seq;

	BT_DBG("chan %p, txseq %u", chan, txseq);

	memset(&control, 0, sizeof(control));
	control.sframe = 1;
	control.super = L2CAP_SUPER_SREJ;

	for (seq = chan->expected_tx_seq; seq != txseq;
	     seq = __next_seq(chan, seq)) {
		if (!l2cap_ertm_seq_in_queue(&chan->srej_q, seq)) {
			control.reqseq = seq;
			l2cap_send_sframe(chan, &control);
			l2cap_seq_list_append(&chan->srej_list, seq);
		}
	}

	chan->expected_tx_seq = __next_seq(chan, txseq);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 103 80.47% 2 50.00%
Gustavo Fernando Padovan 24 18.75% 1 25.00%
Mat Martineau 1 0.78% 1 25.00%
Total 128 100.00% 4 100.00%



static void l2cap_send_srej_tail(struct l2cap_chan *chan)
{
	struct l2cap_ctrl control;

	BT_DBG("chan %p", chan);

	if (chan->srej_list.tail == L2CAP_SEQ_LIST_CLEAR)
		return;

	memset(&control, 0, sizeof(control));
	control.sframe = 1;
	control.super = L2CAP_SUPER_SREJ;
	control.reqseq = chan->srej_list.tail;
	l2cap_send_sframe(chan, &control);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 76 100.00% 2 100.00%
Total 76 100.00% 2 100.00%



static void l2cap_send_srej_list(struct l2cap_chan *chan, u16 txseq)
{
	struct l2cap_ctrl control;
	u16 initial_head;
	u16 seq;

	BT_DBG("chan %p, txseq %u", chan, txseq);

	memset(&control, 0, sizeof(control));
	control.sframe = 1;
	control.super = L2CAP_SUPER_SREJ;

	/* Capture initial list head to allow only one pass through the list. */
	initial_head = chan->srej_list.head;

	do {
		seq = l2cap_seq_list_pop(&chan->srej_list);
		if (seq == txseq || seq == L2CAP_SEQ_LIST_CLEAR)
			break;

		control.reqseq = seq;
		l2cap_send_sframe(chan, &control);
		l2cap_seq_list_append(&chan->srej_list, seq);
	} while (chan->srej_list.head != initial_head);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 126 100.00% 2 100.00%
Total 126 100.00% 2 100.00%



static void l2cap_process_reqseq(struct l2cap_chan *chan, u16 reqseq)
{
	struct sk_buff *acked_skb;
	u16 ackseq;

	BT_DBG("chan %p, reqseq %u", chan, reqseq);

	if (chan->unacked_frames == 0 || reqseq == chan->expected_ack_seq)
		return;

	BT_DBG("expected_ack_seq %u, unacked_frames %u",
	       chan->expected_ack_seq, chan->unacked_frames);

	for (ackseq = chan->expected_ack_seq; ackseq != reqseq;
	     ackseq = __next_seq(chan, ackseq)) {

		acked_skb = l2cap_ertm_seq_in_queue(&chan->tx_q, ackseq);
		if (acked_skb) {
			skb_unlink(acked_skb, &chan->tx_q);
			kfree_skb(acked_skb);
			chan->unacked_frames--;
		}
	}

	chan->expected_ack_seq = reqseq;

	if (chan->unacked_frames == 0)
		__clear_retrans_timer(chan);

	BT_DBG("unacked_frames %u", chan->unacked_frames);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 133 89.86% 2 66.67%
Gustavo Fernando Padovan 15 10.14% 1 33.33%
Total 148 100.00% 3 100.00%



static void l2cap_abort_rx_srej_sent(struct l2cap_chan *chan)
{
	BT_DBG("chan %p", chan);

	chan->expected_tx_seq = chan->buffer_seq;
	l2cap_seq_list_clear(&chan->srej_list);
	skb_queue_purge(&chan->srej_q);
	chan->rx_state = L2CAP_RX_STATE_RECV;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 25 52.08% 1 20.00%
Gustavo Fernando Padovan 14 29.17% 1 20.00%
Mat Martineau 9 18.75% 3 60.00%
Total 48 100.00% 5 100.00%



static void l2cap_tx_state_xmit(struct l2cap_chan *chan,
				struct l2cap_ctrl *control,
				struct sk_buff_head *skbs, u8 event)
{
	BT_DBG("chan %p, control %p, skbs %p, event %d", chan, control, skbs,
	       event);

	switch (event) {
	case L2CAP_EV_DATA_REQUEST:
		if (chan->tx_send_head == NULL)
			chan->tx_send_head = skb_peek(skbs);

		skb_queue_splice_tail_init(skbs, &chan->tx_q);
		l2cap_ertm_send(chan);
		break;
	case L2CAP_EV_LOCAL_BUSY_DETECTED:
		BT_DBG("Enter LOCAL_BUSY");
		set_bit(CONN_LOCAL_BUSY, &chan->conn_state);

		if (chan->rx_state == L2CAP_RX_STATE_SREJ_SENT) {
			/* The SREJ_SENT state must be aborted if we are to
                         * enter the LOCAL_BUSY state.
                         */
			l2cap_abort_rx_srej_sent(chan);
		}

		l2cap_send_ack(chan);

		break;
	case L2CAP_EV_LOCAL_BUSY_CLEAR:
		BT_DBG("Exit LOCAL_BUSY");
		clear_bit(CONN_LOCAL_BUSY, &chan->conn_state);

		if (test_bit(CONN_RNR_SENT, &chan->conn_state)) {
			struct l2cap_ctrl local_control;

			memset(&local_control, 0, sizeof(local_control));
			local_control.sframe = 1;
			local_control.super = L2CAP_SUPER_RR;
			local_control.poll = 1;
			local_control.reqseq = chan->buffer_seq;
			l2cap_send_sframe(chan, &local_control);

			chan->retry_count = 1;
			__set_monitor_timer(chan);
			chan->tx_state = L2CAP_TX_STATE_WAIT_F;
		}
		break;
	case L2CAP_EV_RECV_REQSEQ_AND_FBIT:
		l2cap_process_reqseq(chan, control->reqseq);
		break;
	case L2CAP_EV_EXPLICIT_POLL:
		l2cap_send_rr_or_rnr(chan, 1);
		chan->retry_count = 1;
		__set_monitor_timer(chan);
		__clear_ack_timer(chan);
		chan->tx_state = L2CAP_TX_STATE_WAIT_F;
		break;
	case L2CAP_EV_RETRANS_TO:
		l2cap_send_rr_or_rnr(chan, 1);
		chan->retry_count = 1;
		__set_monitor_timer(chan);
		chan->tx_state = L2CAP_TX_STATE_WAIT_F;
		break;
	case L2CAP_EV_RECV_FBIT:
		/* Nothing to process */
		break;
	default:
		break;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 166 55.15% 1 25.00%
Mat Martineau 135 44.85% 3 75.00%
Total 301 100.00% 4 100.00%



static void l2cap_tx_state_wait_f(struct l2cap_chan *chan,
				  struct l2cap_ctrl *control,
				  struct sk_buff_head *skbs, u8 event)
{
	BT_DBG("chan %p, control %p, skbs %p, event %d", chan, control, skbs,
	       event);

	switch (event) {
	case L2CAP_EV_DATA_REQUEST:
		if (chan->tx_send_head == NULL)
			chan->tx_send_head = skb_peek(skbs);
		/* Queue data, but don't send. */
		skb_queue_splice_tail_init(skbs, &chan->tx_q);
		break;
	case L2CAP_EV_LOCAL_BUSY_DETECTED:
		BT_DBG("Enter LOCAL_BUSY");
		set_bit(CONN_LOCAL_BUSY, &chan->conn_state);

		if (chan->rx_state == L2CAP_RX_STATE_SREJ_SENT) {
			/* The SREJ_SENT state must be aborted if we are to
                         * enter the LOCAL_BUSY state.
                         */
			l2cap_abort_rx_srej_sent(chan);
		}

		l2cap_send_ack(chan);

		break;
	case L2CAP_EV_LOCAL_BUSY_CLEAR:
		BT_DBG("Exit LOCAL_BUSY");
		clear_bit(CONN_LOCAL_BUSY, &chan->conn_state);

		if (test_bit(CONN_RNR_SENT, &chan->conn_state)) {
			struct l2cap_ctrl local_control;
			memset(&local_control, 0, sizeof(local_control));
			local_control.sframe = 1;
			local_control.super = L2CAP_SUPER_RR;
			local_control.poll = 1;
			local_control.reqseq = chan->buffer_seq;
			l2cap_send_sframe(chan, &local_control);

			chan->retry_count = 1;
			__set_monitor_timer(chan);
			chan->tx_state = L2CAP_TX_STATE_WAIT_F;
		}
		break;
	case L2CAP_EV_RECV_REQSEQ_AND_FBIT:
		l2cap_process_reqseq(chan, control->reqseq);

		/* Fall through */

	case L2CAP_EV_RECV_FBIT:
		if (control && control->final) {
			__clear_monitor_timer(chan);
			if (chan->unacked_frames > 0)
				__set_retrans_timer(chan);
			chan->retry_count = 0;
			chan->tx_state = L2CAP_TX_STATE_XMIT;
			BT_DBG("recv fbit tx_state 0x2.2%x", chan->tx_state);
		}
		break;
	case L2CAP_EV_EXPLICIT_POLL:
		/* Ignore */
		break;
	case L2CAP_EV_MONITOR_TO:
		if (chan->max_tx == 0 || chan->retry_count < chan->max_tx) {
			l2cap_send_rr_or_rnr(chan, 1);
			__set_monitor_timer(chan);
			chan->retry_count++;
		} else {
			l2cap_send_disconn_req(chan, ECONNABORTED);
		}
		break;
	default:
		break;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 263 77.81% 2 50.00%
Johan Hedberg 74 21.89% 1 25.00%
Gustavo Fernando Padovan 1 0.30% 1 25.00%
Total 338 100.00% 4 100.00%



static void l2cap_tx(struct l2cap_chan *chan, struct l2cap_ctrl *control,
		     struct sk_buff_head *skbs, u8 event)
{
	BT_DBG("chan %p, control %p, skbs %p, event %d, state %d",
	       chan, control, skbs, event, chan->tx_state);

	switch (chan->tx_state) {
	case L2CAP_TX_STATE_XMIT:
		l2cap_tx_state_xmit(chan, control, skbs, event);
		break;
	case L2CAP_TX_STATE_WAIT_F:
		l2cap_tx_state_wait_f(chan, control, skbs, event);
		break;
	default:
		/* Ignore event */
		break;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 51 62.20% 1 33.33%
Johan Hedberg 30 36.59% 1 33.33%
Gustavo Fernando Padovan 1 1.22% 1 33.33%
Total 82 100.00% 3 100.00%



static void l2cap_pass_to_tx(struct l2cap_chan *chan,
			     struct l2cap_ctrl *control)
{
	BT_DBG("chan %p, control %p", chan, control);
	l2cap_tx(chan, control, NULL, L2CAP_EV_RECV_REQSEQ_AND_FBIT);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 26 72.22% 1 50.00%
Mat Martineau 10 27.78% 1 50.00%
Total 36 100.00% 2 100.00%



static void l2cap_pass_to_tx_fbit(struct l2cap_chan *chan,
				  struct l2cap_ctrl *control)
{
	BT_DBG("chan %p, control %p", chan, control);
	l2cap_tx(chan, control, NULL, L2CAP_EV_RECV_FBIT);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 24 66.67% 1 50.00%
Mat Martineau 12 33.33% 1 50.00%
Total 36 100.00% 2 100.00%

/* Copy frame to all raw sockets on that connection */


static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb)
{
	struct sk_buff *nskb;
	struct l2cap_chan *chan;

	BT_DBG("conn %p", conn);

	mutex_lock(&conn->chan_lock);

	list_for_each_entry(chan, &conn->chan_l, list) {
		if (chan->chan_type != L2CAP_CHAN_RAW)
			continue;

		/* Don't send frame to the channel it came from */
		if (bt_cb(skb)->l2cap.chan == chan)
			continue;

		nskb = skb_clone(skb, GFP_KERNEL);
		if (!nskb)
			continue;
		if (chan->ops->recv(chan, nskb))
			kfree_skb(nskb);
	}

	mutex_unlock(&conn->chan_lock);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 73 62.93% 2 66.67%
Mat Martineau 43 37.07% 1 33.33%
Total 116 100.00% 3 100.00%

/* ---- L2CAP signalling commands ---- */


static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, u8 code,
				       u8 ident, u16 dlen, void *data)
{
	struct sk_buff *skb, **frag;
	struct l2cap_cmd_hdr *cmd;
	struct l2cap_hdr *lh;
	int len, count;

	BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %u",
	       conn, code, ident, dlen);

	if (conn->mtu < L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE)
		return NULL;

	len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen;
	count = min_t(unsigned int, conn->mtu, len);

	skb = bt_skb_alloc(count, GFP_KERNEL);
	if (!skb)
		return NULL;

	lh = skb_put(skb, L2CAP_HDR_SIZE);
	lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen);

	if (conn->hcon->type == LE_LINK)
		lh->cid = cpu_to_le16(L2CAP_CID_LE_SIGNALING);
	else
		lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING);

	cmd = skb_put(skb, L2CAP_CMD_HDR_SIZE);
	cmd->code  = code;
	cmd->ident = ident;
	cmd->len   = cpu_to_le16(dlen);

	if (dlen) {
		count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE;
		skb_put_data(skb, data, count);
		data += count;
	}

	len -= skb->len;

	/* Continuation fragments (no L2CAP header) */
	frag = &skb_shinfo(skb)->frag_list;
	while (len) {
		count = min_t(unsigned int, conn->mtu, len);

		*frag = bt_skb_alloc(count, GFP_KERNEL);
		if (!*frag)
			goto fail;

		skb_put_data(*frag, data, count);

		len  -= count;
		data += count;

		frag = &(*frag)->next;
	}

	return skb;

fail:
	kfree_skb(skb);
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 226 72.90% 4 30.77%
Claudio Takahasi 19 6.13% 1 7.69%
Marcel Holtmann 18 5.81% 1 7.69%
Johan Hedberg 15 4.84% 1 7.69%
Anderson Lizardo 13 4.19% 1 7.69%
Mat Martineau 8 2.58% 1 7.69%
Linus Torvalds 6 1.94% 1 7.69%
Johannes Berg 2 0.65% 1 7.69%
Joe Perches 2 0.65% 1 7.69%
Andrei Emeltchenko 1 0.32% 1 7.69%
Total 310 100.00% 13 100.00%



static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen,
				     unsigned long *val)
{
	struct l2cap_conf_opt *opt = *ptr;
	int len;

	len = L2CAP_CONF_OPT_SIZE + opt->len;
	*ptr += len;

	*type = opt->type;
	*olen = opt->len;

	switch (opt->len) {
	case 1:
		*val = *((u8 *) opt->val);
		break;

	case 2:
		*val = get_unaligned_le16(opt->val);
		break;

	case 4:
		*val = get_unaligned_le32(opt->val);
		break;

	default:
		*val = (unsigned long) opt->val;
		break;
	}

	BT_DBG("type 0x%2.2x len %u val 0x%lx", *type, opt->len, *val);
	return len;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 101 68.24% 3 37.50%
Marcel Holtmann 31 20.95% 2 25.00%
Linus Torvalds 13 8.78% 1 12.50%
Steven Miao 2 1.35% 1 12.50%
Andrei Emeltchenko 1 0.68% 1 12.50%
Total 148 100.00% 8 100.00%



static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val, size_t size)
{
	struct l2cap_conf_opt *opt = *ptr;

	BT_DBG("type 0x%2.2x len %u val 0x%lx", type, len, val);

	if (size < L2CAP_CONF_OPT_SIZE + len)
		return;

	opt->type = type;
	opt->len  = len;

	switch (len) {
	case 1:
		*((u8 *) opt->val)  = val;
		break;

	case 2:
		put_unaligned_le16(val, opt->val);
		break;

	case 4:
		put_unaligned_le32(val, opt->val);
		break;

	default:
		memcpy(opt->val, (void *) val, len);
		break;
	}

	*ptr += L2CAP_CONF_OPT_SIZE + len;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 110 80.29% 2 40.00%
Steven Miao 14 10.22% 1 20.00%
Ben Seri 12 8.76% 1 20.00%
Andrei Emeltchenko 1 0.73% 1 20.00%
Total 137 100.00% 5 100.00%



static void l2cap_add_opt_efs(void **ptr, struct l2cap_chan *chan, size_t size)
{
	struct l2cap_conf_efs efs;

	switch (chan->mode) {
	case L2CAP_MODE_ERTM:
		efs.id		= chan->local_id;
		efs.stype	= chan->local_stype;
		efs.msdu	= cpu_to_le16(chan->local_msdu);
		efs.sdu_itime	= cpu_to_le32(chan->local_sdu_itime);
		efs.acc_lat	= cpu_to_le32(L2CAP_DEFAULT_ACC_LAT);
		efs.flush_to	= cpu_to_le32(L2CAP_EFS_DEFAULT_FLUSH_TO);
		break;

	case L2CAP_MODE_STREAMING:
		efs.id		= 1;
		efs.stype	= L2CAP_SERV_BESTEFFORT;
		efs.msdu	= cpu_to_le16(chan->local_msdu);
		efs.sdu_itime	= cpu_to_le32(chan->local_sdu_itime);
		efs.acc_lat	= 0;
		efs.flush_to	= 0;
		break;

	default:
		return;
	}

	l2cap_add_conf_opt(ptr, L2CAP_CONF_EFS, sizeof(efs),
			   (unsigned long) &efs, size);
}

Contributors
Person Tokens Prop Commits CommitProp
Andrei Emeltchenko 157 95.73% 2 50.00%
Ben Seri 5 3.05% 1 25.00%
Joe Perches 2 1.22% 1 25.00%
Total 164 100.00% 4 100.00%



static void l2cap_ack_timeout(struct work_struct *work)
{
	struct l2cap_chan *chan = container_of(work, struct l2cap_chan,
					       ack_timer.work);
	u16 frames_to_ack;

	BT_DBG("chan %p", chan);

	l2cap_chan_lock(chan);

	frames_to_ack = __seq_offset(chan, chan->buffer_seq,
				     chan->last_acked_seq);

	if (frames_to_ack)
		l2cap_send_rr_or_rnr(chan, 0);

	l2cap_chan_unlock(chan);
	l2cap_chan_put(chan);
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 47 59.49% 4 57.14%
Mat Martineau 25 31.65% 1 14.29%
Szymon Janc 5 6.33% 1 14.29%
Andrei Emeltchenko 2 2.53% 1 14.29%
Total 79 100.00% 7 100.00%



int l2cap_ertm_init(struct l2cap_chan *chan)
{
	int err;

	chan->next_tx_seq = 0;
	chan->expected_tx_seq = 0;
	chan->expected_ack_seq = 0;
	chan->unacked_frames = 0;
	chan->buffer_seq = 0;
	chan->frames_sent = 0;
	chan->last_acked_seq = 0;
	chan->sdu = NULL;
	chan->sdu_last_frag = NULL;
	chan->sdu_len = 0;

	skb_queue_head_init(&chan->tx_q);

	chan->local_amp_id = AMP_ID_BREDR;
	chan->move_id = AMP_ID_BREDR;
	chan->move_state = L2CAP_MOVE_STABLE;
	chan->move_role = L2CAP_MOVE_ROLE_NONE;

	if (chan->mode != L2CAP_MODE_ERTM)
		return 0;

	chan->rx_state = L2CAP_RX_STATE_RECV;
	chan->tx_state = L2CAP_TX_STATE_XMIT;

	INIT_DELAYED_WORK(&chan->retrans_timer, l2cap_retrans_timeout);
	INIT_DELAYED_WORK(&chan->monitor_timer, l2cap_monitor_timeout);
	INIT_DELAYED_WORK(&chan->ack_timer, l2cap_ack_timeout);

	skb_queue_head_init(&chan->srej_q);

	err = l2cap_seq_list_init(&chan->srej_list, chan->tx_win);
	if (err < 0)
		return err;

	err = l2cap_seq_list_init(&chan->retrans_list, chan->remote_tx_win);
	if (err < 0)
		l2cap_seq_list_free(&chan->srej_list);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 147 66.82% 5 33.33%
Gustavo Fernando Padovan 71 32.27% 9 60.00%
Marcel Holtmann 2 0.91% 1 6.67%
Total 220 100.00% 15 100.00%



static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask)
{
	switch (mode) {
	case L2CAP_MODE_STREAMING:
	case L2CAP_MODE_ERTM:
		if (l2cap_mode_supported(mode, remote_feat_mask))
			return mode;
		/* fall through */
	default:
		return L2CAP_MODE_BASIC;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 42 100.00% 2 100.00%
Total 42 100.00% 2 100.00%



static inline bool __l2cap_ews_supported(struct l2cap_conn *conn)
{
	return ((conn->local_fixed_chan & L2CAP_FC_A2MP) &&
		(conn->feat_mask & L2CAP_FEAT_EXT_WINDOW));
}

Contributors
Person Tokens Prop Commits CommitProp
Andrei Emeltchenko 12 38.71% 1 20.00%
Johan Hedberg 9 29.03% 1 20.00%
Gustavo Fernando Padovan 6 19.35% 2 40.00%
Marcel Holtmann 4 12.90% 1 20.00%
Total 31 100.00% 5 100.00%



static inline bool __l2cap_efs_supported(struct l2cap_conn *conn)
{
	return ((conn->local_fixed_chan & L2CAP_FC_A2MP) &&
		(conn->feat_mask & L2CAP_FEAT_EXT_FLOW));
}

Contributors
Person Tokens Prop Commits CommitProp
Andrei Emeltchenko 14 45.16% 1 20.00%
Johan Hedberg 9 29.03% 1 20.00%
Gustavo Fernando Padovan 4 12.90% 2 40.00%
Marcel Holtmann 4 12.90% 1 20.00%
Total 31 100.00% 5 100.00%



static void __l2cap_set_ertm_timeouts(struct l2cap_chan *chan,
				      struct l2cap_conf_rfc *rfc)
{
	if (chan->local_amp_id != AMP_ID_BREDR && chan->hs_hcon) {
		u64 ertm_to = chan->hs_hcon->hdev->amp_be_flush_to;

		/* Class 1 devices have must have ERTM timeouts
                 * exceeding the Link Supervision Timeout.  The
                 * default Link Supervision Timeout for AMP
                 * controllers is 10 seconds.
                 *
                 * Class 1 devices use 0xffffffff for their
                 * best-effort flush timeout, so the clamping logic
                 * will result in a timeout that meets the above
                 * requirement.  ERTM timeouts are 16-bit values, so
                 * the maximum timeout is 65.535 seconds.
                 */

		/* Convert timeout to milliseconds and round */
		ertm_to = DIV_ROUND_UP_ULL(ertm_to, 1000);

		/* This is the recommended formula for class 2 devices
                 * that start ERTM timers when packets are sent to the
                 * controller.
                 */
		ertm_to = 3 * ertm_to + 500;

		if (ertm_to > 0xffff)
			ertm_to = 0xffff;

		rfc->retrans_timeout = cpu_to_le16((u16) ertm_to);
		rfc->monitor_timeout = rfc->retrans_timeout;
	} else {
		rfc->retrans_timeout = cpu_to_le16(L2CAP_DEFAULT_RETRANS_TO);
		rfc->monitor_timeout = cpu_to_le16(L2CAP_DEFAULT_MONITOR_TO);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 108 96.43% 1 33.33%
Marcel Holtmann 2 1.79% 1 33.33%
Joe Perches 2 1.79% 1 33.33%
Total 112 100.00% 3 100.00%



static inline void l2cap_txwin_setup(struct l2cap_chan *chan)
{
	if (chan->tx_win > L2CAP_DEFAULT_TX_WINDOW &&
	    __l2cap_ews_supported(chan->conn)) {
		/* use extended control field */
		set_bit(FLAG_EXT_CTRL, &chan->flags);
		chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW;
	} else {
		chan->tx_win = min_t(u16, chan->tx_win,
				     L2CAP_DEFAULT_TX_WINDOW);
		chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW;
	}
	chan->ack_win = chan->tx_win;
}

Contributors
Person Tokens Prop Commits CommitProp
Andrei Emeltchenko 68 87.18% 2 50.00%
Mat Martineau 8 10.26% 1 25.00%
Marcel Holtmann 2 2.56% 1 25.00%
Total 78 100.00% 4 100.00%



static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data, size_t data_size)
{
	struct l2cap_conf_req *req = data;
	struct l2cap_conf_rfc rfc = { .mode = chan->mode };
	void *ptr = req->data;
	void *endptr = data + data_size;
	u16 size;

	BT_DBG("chan %p", chan);

	if (chan->num_conf_req || chan->num_conf_rsp)
		goto done;

	switch (chan->mode) {
	case L2CAP_MODE_STREAMING:
	case L2CAP_MODE_ERTM:
		if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state))
			break;

		if (__l2cap_efs_supported(chan->conn))
			set_bit(FLAG_EFS_ENABLE, &chan->flags);

		/* fall through */
	default:
		chan->mode = l2cap_select_mode(rfc.mode, chan->conn->feat_mask);
		break;
	}

done:
	if (chan->imtu != L2CAP_DEFAULT_MTU)
		l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu, endptr - ptr);

	switch (chan->mode) {
	case L2CAP_MODE_BASIC:
		if (disable_ertm)
			break;

		if (!(chan->conn->feat_mask & L2CAP_FEAT_ERTM) &&
		    !(chan->conn->feat_mask & L2CAP_FEAT_STREAMING))
			break;

		rfc.mode            = L2CAP_MODE_BASIC;
		rfc.txwin_size      = 0;
		rfc.max_transmit    = 0;
		rfc.retrans_timeout = 0;
		rfc.monitor_timeout = 0;
		rfc.max_pdu_size    = 0;

		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
				   (unsigned long) &rfc, endptr - ptr);
		break;

	case L2CAP_MODE_ERTM:
		rfc.mode            = L2CAP_MODE_ERTM;
		rfc.max_transmit    = chan->max_tx;

		__l2cap_set_ertm_timeouts(chan, &rfc);

		size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu -
			     L2CAP_EXT_HDR_SIZE - L2CAP_SDULEN_SIZE -
			     L2CAP_FCS_SIZE);
		rfc.max_pdu_size = cpu_to_le16(size);

		l2cap_txwin_setup(chan);

		rfc.txwin_size = min_t(u16, chan->tx_win,
				       L2CAP_DEFAULT_TX_WINDOW);

		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
				   (unsigned long) &rfc, endptr - ptr);

		if (test_bit(FLAG_EFS_ENABLE, &chan->flags))
			l2cap_add_opt_efs(&ptr, chan, endptr - ptr);

		if (test_bit(FLAG_EXT_CTRL, &chan->flags))
			l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2,
					   chan->tx_win, endptr - ptr);

		if (chan->conn->feat_mask & L2CAP_FEAT_FCS)
			if (chan->fcs == L2CAP_FCS_NONE ||
			    test_bit(CONF_RECV_NO_FCS, &chan->conf_state)) {
				chan->fcs = L2CAP_FCS_NONE;
				l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1,
						   chan->fcs, endptr - ptr);
			}
		break;

	case L2CAP_MODE_STREAMING:
		l2cap_txwin_setup(chan);
		rfc.mode            = L2CAP_MODE_STREAMING;
		rfc.txwin_size      = 0;
		rfc.max_transmit    = 0;
		rfc.retrans_timeout = 0;
		rfc.monitor_timeout = 0;

		size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu -
			     L2CAP_EXT_HDR_SIZE - L2CAP_SDULEN_SIZE -
			     L2CAP_FCS_SIZE);
		rfc.max_pdu_size = cpu_to_le16(size);

		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
				   (unsigned long) &rfc, endptr - ptr);

		if (test_bit(FLAG_EFS_ENABLE, &chan->flags))
			l2cap_add_opt_efs(&ptr, chan, endptr - ptr);

		if (chan->conn->feat_mask & L2CAP_FEAT_FCS)
			if (chan->fcs == L2CAP_FCS_NONE ||
			    test_bit(CONF_RECV_NO_FCS, &chan->conf_state)) {
				chan->fcs = L2CAP_FCS_NONE;
				l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1,
						   chan->fcs, endptr - ptr);
			}
		break;
	}

	req->dcid  = cpu_to_le16(chan->dcid);
	req->flags = cpu_to_le16(0);

	return ptr - data;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 483 71.34% 20 64.52%
Andrei Emeltchenko 128 18.91% 5 16.13%
Ben Seri 47 6.94% 1 3.23%
Mat Martineau 11 1.62% 2 6.45%
Marcel Holtmann 7 1.03% 2 6.45%
Joe Perches 1 0.15% 1 3.23%
Total 677 100.00% 31 100.00%



static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data, size_t data_size)
{
	struct l2cap_conf_rsp *rsp = data;
	void *ptr = rsp->data;
	void *endptr = data + data_size;
	void *req = chan->conf_req;
	int len = chan->conf_len;
	int type, hint, olen;
	unsigned long val;
	struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC };
	struct l2cap_conf_efs efs;
	u8 remote_efs = 0;
	u16 mtu = L2CAP_DEFAULT_MTU;
	u16 result = L2CAP_CONF_SUCCESS;
	u16 size;

	BT_DBG("chan %p", chan);

	while (len >= L2CAP_CONF_OPT_SIZE) {
		len -= l2cap_get_conf_opt(&req, &type, &olen, &val);

		hint  = type & L2CAP_CONF_HINT;
		type &= L2CAP_CONF_MASK;

		switch (type) {
		case L2CAP_CONF_MTU:
			mtu = val;
			break;

		case L2CAP_CONF_FLUSH_TO:
			chan->flush_to = val;
			break;

		case L2CAP_CONF_QOS:
			break;

		case L2CAP_CONF_RFC:
			if (olen == sizeof(rfc))
				memcpy(&rfc, (void *) val, olen);
			break;

		case L2CAP_CONF_FCS:
			if (val == L2CAP_FCS_NONE)
				set_bit(CONF_RECV_NO_FCS, &chan->conf_state);
			break;

		case L2CAP_CONF_EFS:
			if (olen == sizeof(efs)) {
				remote_efs = 1;
				memcpy(&efs, (void *) val, olen);
			}
			break;

		case L2CAP_CONF_EWS:
			if (!(chan->conn->local_fixed_chan & L2CAP_FC_A2MP))
				return -ECONNREFUSED;

			set_bit(FLAG_EXT_CTRL, &chan->flags);
			set_bit(CONF_EWS_RECV, &chan->conf_state);
			chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW;
			chan->remote_tx_win = val;
			break;

		default:
			if (hint)
				break;

			result = L2CAP_CONF_UNKNOWN;
			*((u8 *) ptr++) = type;
			break;
		}
	}

	if (chan->num_conf_rsp || chan->num_conf_req > 1)
		goto done;

	switch (chan->mode) {
	case L2CAP_MODE_STREAMING:
	case L2CAP_MODE_ERTM:
		if (!test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) {
			chan->mode = l2cap_select_mode(rfc.mode,
						       chan->conn->feat_mask);
			break;
		}

		if (remote_efs) {
			if (__l2cap_efs_supported(chan->conn))
				set_bit(FLAG_EFS_ENABLE, &chan->flags);
			else
				return -ECONNREFUSED;
		}

		if (chan->mode != rfc.mode)
			return -ECONNREFUSED;

		break;
	}

done:
	if (chan->mode != rfc.mode) {
		result = L2CAP_CONF_UNACCEPT;
		rfc.mode = chan->mode;

		if (chan->num_conf_rsp == 1)
			return -ECONNREFUSED;

		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
				   (unsigned long) &rfc, endptr - ptr);
	}

	if (result == L2CAP_CONF_SUCCESS) {
		/* Configure output options and let the other side know
                 * which ones we don't like. */

		if (mtu < L2CAP_DEFAULT_MIN_MTU)
			result = L2CAP_CONF_UNACCEPT;
		else {
			chan->omtu = mtu;
			set_bit(CONF_MTU_DONE, &chan->conf_state);
		}
		l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->omtu, endptr - ptr);

		if (remote_efs) {
			if (chan->local_stype != L2CAP_SERV_NOTRAFIC &&
			    efs.stype != L2CAP_SERV_NOTRAFIC &&
			    efs.stype != chan->local_stype) {

				result = L2CAP_CONF_UNACCEPT;

				if (chan->num_conf_req >= 1)
					return -ECONNREFUSED;

				l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS,
						   sizeof(efs),
						   (unsigned long) &efs, endptr - ptr);
			} else {
				/* Send PENDING Conf Rsp */
				result = L2CAP_CONF_PENDING;
				set_bit(CONF_LOC_CONF_PEND, &chan->conf_state);
			}
		}

		switch (rfc.mode) {
		case L2CAP_MODE_BASIC:
			chan->fcs = L2CAP_FCS_NONE;
			set_bit(CONF_MODE_DONE, &chan->conf_state);
			break;

		case L2CAP_MODE_ERTM:
			if (!test_bit(CONF_EWS_RECV, &chan->conf_state))
				chan->remote_tx_win = rfc.txwin_size;
			else
				rfc.txwin_size = L2CAP_DEFAULT_TX_WINDOW;

			chan->remote_max_tx = rfc.max_transmit;

			size = min_t(u16, le16_to_cpu(rfc.max_pdu_size),
				     chan->conn->mtu - L2CAP_EXT_HDR_SIZE -
				     L2CAP_SDULEN_SIZE - L2CAP_FCS_SIZE);
			rfc.max_pdu_size = cpu_to_le16(size);
			chan->remote_mps = size;

			__l2cap_set_ertm_timeouts(chan, &rfc);

			set_bit(CONF_MODE_DONE, &chan->conf_state);

			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
					   sizeof(rfc), (unsigned long) &rfc, endptr - ptr);

			if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) {
				chan->remote_id = efs.id;
				chan->remote_stype = efs.stype;
				chan->remote_msdu = le16_to_cpu(efs.msdu);
				chan->remote_flush_to =
					le32_to_cpu(efs.flush_to);
				chan->remote_acc_lat =
					le32_to_cpu(efs.acc_lat);
				chan->remote_sdu_itime =
					le32_to_cpu(efs.sdu_itime);
				l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS,
						   sizeof(efs),
						   (unsigned long) &efs, endptr - ptr);
			}
			break;

		case L2CAP_MODE_STREAMING:
			size = min_t(u16, le16_to_cpu(rfc.max_pdu_size),
				     chan->conn->mtu - L2CAP_EXT_HDR_SIZE -
				     L2CAP_SDULEN_SIZE - L2CAP_FCS_SIZE);
			rfc.max_pdu_size = cpu_to_le16(size);
			chan->remote_mps = size;

			set_bit(CONF_MODE_DONE, &chan->conf_state);

			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
					   (unsigned long) &rfc, endptr - ptr);

			break;

		default:
			result = L2CAP_CONF_UNACCEPT;

			memset(&rfc, 0, sizeof(rfc));
			rfc.mode = chan->mode;
		}

		if (result == L2CAP_CONF_SUCCESS)
			set_bit(CONF_OUTPUT_DONE, &chan->conf_state);
	}
	rsp->scid   = cpu_to_le16(chan->dcid);
	rsp->result = cpu_to_le16(result);
	rsp->flags  = cpu_to_le16(0);

	return ptr - data;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 655 62.80% 16 53.33%
Andrei Emeltchenko 324 31.06% 7 23.33%
Ben Seri 41 3.93% 2 6.67%
Mat Martineau 11 1.05% 2 6.67%
Marcel Holtmann 6 0.58% 1 3.33%
Johan Hedberg 5 0.48% 1 3.33%
Joe Perches 1 0.10% 1 3.33%
Total 1043 100.00% 30 100.00%



static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len,
				void *data, size_t size, u16 *result)
{
	struct l2cap_conf_req *req = data;
	void *ptr = req->data;
	void *endptr = data + size;
	int type, olen;
	unsigned long val;
	struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC };
	struct l2cap_conf_efs efs;

	BT_DBG("chan %p, rsp %p, len %d, req %p", chan, rsp, len, data);

	while (len >= L2CAP_CONF_OPT_SIZE) {
		len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val);

		switch (type) {
		case L2CAP_CONF_MTU:
			if (val < L2CAP_DEFAULT_MIN_MTU) {
				*result = L2CAP_CONF_UNACCEPT;
				chan->imtu = L2CAP_DEFAULT_MIN_MTU;
			} else
				chan->imtu = val;
			l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu, endptr - ptr);
			break;

		case L2CAP_CONF_FLUSH_TO:
			chan->flush_to = val;
			l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO,
					   2, chan->flush_to, endptr - ptr);
			break;

		case L2CAP_CONF_RFC:
			if (olen == sizeof(rfc))
				memcpy(&rfc, (void *)val, olen);

			if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state) &&
			    rfc.mode != chan->mode)
				return -ECONNREFUSED;

			chan->fcs = 0;

			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
					   sizeof(rfc), (unsigned long) &rfc, endptr - ptr);
			break;

		case L2CAP_CONF_EWS:
			chan->ack_win = min_t(u16, val, chan->ack_win);
			l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2,
					   chan->tx_win, endptr - ptr);
			break;

		case L2CAP_CONF_EFS:
			if (olen == sizeof(efs)) {
				memcpy(&efs, (void *)val, olen);

				if (chan->local_stype != L2CAP_SERV_NOTRAFIC &&
				    efs.stype != L2CAP_SERV_NOTRAFIC &&
				    efs.stype != chan->local_stype)
					return -ECONNREFUSED;

				l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, sizeof(efs),
						   (unsigned long) &efs, endptr - ptr);
			}
			break;

		case L2CAP_CONF_FCS:
			if (*result == L2CAP_CONF_PENDING)
				if (val == L2CAP_FCS_NONE)
					set_bit(CONF_RECV_NO_FCS,
						&chan->conf_state);
			break;
		}
	}

	if (chan->mode == L2CAP_MODE_BASIC && chan->mode != rfc.mode)
		return -ECONNREFUSED;

	chan->mode = rfc.mode;

	if (*result == L2CAP_CONF_SUCCESS || *result == L2CAP_CONF_PENDING) {
		switch (rfc.mode) {
		case L2CAP_MODE_ERTM:
			chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout);
			chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout);
			chan->mps    = le16_to_cpu(rfc.max_pdu_size);
			if (!test_bit(FLAG_EXT_CTRL, &chan->flags))
				chan->ack_win = min_t(u16, chan->ack_win,
						      rfc.txwin_size);

			if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) {
				chan->local_msdu = le16_to_cpu(efs.msdu);
				chan->local_sdu_itime =
					le32_to_cpu(efs.sdu_itime);
				chan->local_acc_lat = le32_to_cpu(efs.acc_lat);
				chan->local_flush_to =
					le32_to_cpu(efs.flush_to);
			}
			break;

		case L2CAP_MODE_STREAMING:
			chan->mps    = le16_to_cpu(rfc.max_pdu_size);
		}
	}

	req->dcid   = cpu_to_le16(chan->dcid);
	req->flags  = cpu_to_le16(0);

	return ptr - data;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 359 56.62% 9 42.86%
Andrei Emeltchenko 200 31.55% 7 33.33%
Mat Martineau 41 6.47% 2 9.52%
Ben Seri 33 5.21% 2 9.52%
Joe Perches 1 0.16% 1 4.76%
Total 634 100.00% 21 100.00%



static int l2cap_build_conf_rsp(struct l2cap_chan *chan, void *data,
				u16 result, u16 flags)
{
	struct l2cap_conf_rsp *rsp = data;
	void *ptr = rsp->data;

	BT_DBG("chan %p", chan);

	rsp->scid   = cpu_to_le16(chan->dcid);
	rsp->result = cpu_to_le16(result);
	rsp->flags  = cpu_to_le16(flags);

	return ptr - data;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 77 100.00% 2 100.00%
Total 77 100.00% 2 100.00%



void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan)
{
	struct l2cap_le_conn_rsp rsp;
	struct l2cap_conn *conn = chan->conn;

	BT_DBG("chan %p", chan);

	rsp.dcid    = cpu_to_le16(chan->scid);
	rsp.mtu     = cpu_to_le16(chan->imtu);
	rsp.mps     = cpu_to_le16(chan->mps);
	rsp.credits = cpu_to_le16(chan->rx_credits);
	rsp.result  = cpu_to_le16(L2CAP_CR_SUCCESS);

	l2cap_send_cmd(conn, chan->ident, L2CAP_LE_CONN_RSP, sizeof(rsp),
		       &rsp);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 101 99.02% 3 75.00%
Joe Perches 1 0.98% 1 25.00%
Total 102 100.00% 4 100.00%



void __l2cap_connect_rsp_defer(struct l2cap_chan *chan)
{
	struct l2cap_conn_rsp rsp;
	struct l2cap_conn *conn = chan->conn;
	u8 buf[128];
	u8 rsp_code;

	rsp.scid   = cpu_to_le16(chan->dcid);
	rsp.dcid   = cpu_to_le16(chan->scid);
	rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS);
	rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);

	if (chan->hs_hcon)
		rsp_code = L2CAP_CREATE_CHAN_RSP;
	else
		rsp_code = L2CAP_CONN_RSP;

	BT_DBG("chan %p rsp_code %u", chan, rsp_code);

	l2cap_send_cmd(conn, chan->ident, rsp_code, sizeof(rsp), &rsp);

	if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state))
		return;

	l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
		       l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
	chan->num_conf_req++;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 124 77.99% 5 62.50%
Andrei Emeltchenko 28 17.61% 1 12.50%
Ben Seri 5 3.14% 1 12.50%
Joe Perches 2 1.26% 1 12.50%
Total 159 100.00% 8 100.00%



static void l2cap_conf_rfc_get(struct l2cap_chan *chan, void *rsp, int len)
{
	int type, olen;
	unsigned long val;
	/* Use sane default values in case a misbehaving remote device
         * did not send an RFC or extended window size option.
         */
	u16 txwin_ext = chan->ack_win;
	struct l2cap_conf_rfc rfc = {
		.mode = chan->mode,
		.retrans_timeout = cpu_to_le16(L2CAP_DEFAULT_RETRANS_TO),
		.monitor_timeout = cpu_to_le16(L2CAP_DEFAULT_MONITOR_TO),
		.max_pdu_size = cpu_to_le16(chan->imtu),
		.txwin_size = min_t(u16, chan->ack_win, L2CAP_DEFAULT_TX_WINDOW),
        };

	BT_DBG("chan %p, rsp %p, len %d", chan, rsp, len);

	if ((chan->mode != L2CAP_MODE_ERTM) && (chan->mode != L2CAP_MODE_STREAMING))
		return;

	while (len >= L2CAP_CONF_OPT_SIZE) {
		len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val);

		switch (type) {
		case L2CAP_CONF_RFC:
			if (olen == sizeof(rfc))
				memcpy(&rfc, (void *)val, olen);
			break;
		case L2CAP_CONF_EWS:
			txwin_ext = val;
			break;
		}
	}

	switch (rfc.mode) {
	case L2CAP_MODE_ERTM:
		chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout);
		chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout);
		chan->mps = le16_to_cpu(rfc.max_pdu_size);
		if (test_bit(FLAG_EXT_CTRL, &chan->flags))
			chan->ack_win = min_t(u16, chan->ack_win, txwin_ext);
		else
			chan->ack_win = min_t(u16, chan->ack_win,
					      rfc.txwin_size);
		break;
	case L2CAP_MODE_STREAMING:
		chan->mps    = le16_to_cpu(rfc.max_pdu_size);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 168 58.33% 4 50.00%
Mat Martineau 117 40.62% 2 25.00%
Joe Perches 2 0.69% 1 12.50%
Szymon Janc 1 0.35% 1 12.50%
Total 288 100.00% 8 100.00%



static inline int l2cap_command_rej(struct l2cap_conn *conn,
				    struct l2cap_cmd_hdr *cmd, u16 cmd_len,
				    u8 *data)
{
	struct l2cap_cmd_rej_unk *rej = (struct l2cap_cmd_rej_unk *) data;

	if (cmd_len < sizeof(*rej))
		return -EPROTO;

	if (rej->reason != L2CAP_REJ_NOT_UNDERSTOOD)
		return 0;

	if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) &&
	    cmd->ident == conn->info_ident) {
		cancel_delayed_work(&conn->info_timer);

		conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
		conn->info_ident = 0;

		l2cap_conn_start(conn);
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 88 80.73% 1 25.00%
Johan Hedberg 17 15.60% 1 25.00%
Ilia Kolomisnky 3 2.75% 1 25.00%
Ulisses Furquim 1 0.92% 1 25.00%
Total 109 100.00% 4 100.00%



static struct l2cap_chan *l2cap_connect(struct l2cap_conn *conn,
					struct l2cap_cmd_hdr *cmd,
					u8 *data, u8 rsp_code, u8 amp_id)
{
	struct l2cap_conn_req *req = (struct l2cap_conn_req *) data;
	struct l2cap_conn_rsp rsp;
	struct l2cap_chan *chan = NULL, *pchan;
	int result, status = L2CAP_CS_NO_INFO;

	u16 dcid = 0, scid = __le16_to_cpu(req->scid);
	__le16 psm = req->psm;

	BT_DBG("psm 0x%2.2x scid 0x%4.4x", __le16_to_cpu(psm), scid);

	/* Check if we have socket listening on psm */
	pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, &conn->hcon->src,
					 &conn->hcon->dst, ACL_LINK);
	if (!pchan) {
		result = L2CAP_CR_BAD_PSM;
		goto sendresp;
	}

	mutex_lock(&conn->chan_lock);
	l2cap_chan_lock(pchan);

	/* Check if the ACL is secure enough (if not SDP) */
	if (psm != cpu_to_le16(L2CAP_PSM_SDP) &&
	    !hci_conn_check_link_mode(conn->hcon)) {
		conn->disc_reason = HCI_ERROR_AUTH_FAILURE;
		result = L2CAP_CR_SEC_BLOCK;
		goto response;
	}

	result = L2CAP_CR_NO_MEM;

	/* Check if we already have channel with that dcid */
	if (__l2cap_get_chan_by_dcid(conn, scid))
		goto response;

	chan = pchan->ops->new_connection(pchan);
	if (!chan)
		goto response;

	/* For certain devices (ex: HID mouse), support for authentication,
         * pairing and bonding is optional. For such devices, inorder to avoid
         * the ACL alive for too long after L2CAP disconnection, reset the ACL
         * disc_timeout back to HCI_DISCONN_TIMEOUT during L2CAP connect.
         */
	conn->hcon->disc_timeout = HCI_DISCONN_TIMEOUT;

	bacpy(&chan->src, &conn->hcon->src);
	bacpy(&chan->dst, &conn->hcon->dst);
	chan->src_type = bdaddr_src_type(conn->hcon);
	chan->dst_type = bdaddr_dst_type(conn->hcon);
	chan->psm  = psm;
	chan->dcid = scid;
	chan->local_amp_id = amp_id;

	__l2cap_chan_add(conn, chan);

	dcid = chan->scid;

	__set_chan_timer(chan, chan->ops->get_sndtimeo(chan));

	chan->ident = cmd->ident;

	if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) {
		if (l2cap_chan_check_security(chan, false)) {
			if (test_bit(FLAG_DEFER_SETUP, &chan->flags)) {
				l2cap_state_change(chan, BT_CONNECT2);
				result = L2CAP_CR_PEND;
				status = L2CAP_CS_AUTHOR_PEND;
				chan->ops->defer(chan);
			} else {
				/* Force pending result for AMP controllers.
                                 * The connection will succeed after the
                                 * physical link is up.
                                 */
				if (amp_id == AMP_ID_BREDR) {
					l2cap_state_change(chan, BT_CONFIG);
					result = L2CAP_CR_SUCCESS;
				} else {
					l2cap_state_change(chan, BT_CONNECT2);
					result = L2CAP_CR_PEND;
				}
				status = L2CAP_CS_NO_INFO;
			}
		} else {
			l2cap_state_change(chan, BT_CONNECT2);
			result = L2CAP_CR_PEND;
			status = L2CAP_CS_AUTHEN_PEND;
		}
	} else {
		l2cap_state_change(chan, BT_CONNECT2);
		result = L2CAP_CR_PEND;
		status = L2CAP_CS_NO_INFO;
	}

response:
	l2cap_chan_unlock(pchan);
	mutex_unlock(&conn->chan_lock);
	l2cap_chan_put(pchan);

sendresp:
	rsp.scid   = cpu_to_le16(scid);
	rsp.dcid   = cpu_to_le16(dcid);
	rsp.result = cpu_to_le16(result);
	rsp.status = cpu_to_le16(status);
	l2cap_send_cmd(conn, cmd->ident, rsp_code, sizeof(rsp), &rsp);

	if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) {
		struct l2cap_info_req info;
		info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK);

		conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT;
		conn->info_ident = l2cap_get_ident(conn);

		schedule_delayed_work(&conn->info_timer, L2CAP_INFO_TIMEOUT);

		l2cap_send_cmd(conn, conn->info_ident, L2CAP_INFO_REQ,
			       sizeof(info), &info);
	}

	if (chan && !test_bit(CONF_REQ_SENT, &chan->conf_state) &&
	    result == L2CAP_CR_SUCCESS) {
		u8 buf[128];
		set_bit(CONF_REQ_SENT, &chan->conf_state);
		l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
			       l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
		chan->num_conf_req++;
	}

	return chan;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 526 77.01% 25 48.08%
Marcel Holtmann 63 9.22% 10 19.23%
Mat Martineau 37 5.42% 2 3.85%
Andrei Emeltchenko 22 3.22% 5 9.62%
Johan Hedberg 11 1.61% 4 7.69%
Syam Sidhardhan 9 1.32% 1 1.92%
Ben Seri 5 0.73% 1 1.92%
Ido Yariv 4 0.59% 1 1.92%
Linus Torvalds 3 0.44% 1 1.92%
Joe Perches 2 0.29% 1 1.92%
Nathan Holstein 1 0.15% 1 1.92%
Total 683 100.00% 52 100.00%



static int l2cap_connect_req(struct l2cap_conn *conn,
			     struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data)
{
	struct hci_dev *hdev = conn->hcon->hdev;
	struct hci_conn *hcon = conn->hcon;

	if (cmd_len < sizeof(struct l2cap_conn_req))
		return -EPROTO;

	hci_dev_lock(hdev);
	if (hci_dev_test_flag(hdev, HCI_MGMT) &&
	    !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &hcon->flags))
		mgmt_device_connected(hdev, hcon, 0, NULL, 0);
	hci_dev_unlock(hdev);

	l2cap_connect(conn, cmd, data, L2CAP_CONN_RSP, 0);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jaganath Kanakkassery 60 51.72% 1 12.50%
Johan Hedberg 17 14.66% 1 12.50%
Mat Martineau 13 11.21% 1 12.50%
Linus Torvalds 12 10.34% 1 12.50%
Gustavo Fernando Padovan 10 8.62% 2 25.00%
Marcel Holtmann 4 3.45% 2 25.00%
Total 116 100.00% 8 100.00%



static int l2cap_connect_create_rsp(struct l2cap_conn *conn,
				    struct l2cap_cmd_hdr *cmd, u16 cmd_len,
				    u8 *data)
{
	struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data;
	u16 scid, dcid, result, status;
	struct l2cap_chan *chan;
	u8 req[128];
	int err;

	if (cmd_len < sizeof(*rsp))
		return -EPROTO;

	scid   = __le16_to_cpu(rsp->scid);
	dcid   = __le16_to_cpu(rsp->dcid);
	result = __le16_to_cpu(rsp->result);
	status = __le16_to_cpu(rsp->status);

	BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x",
	       dcid, scid, result, status);

	mutex_lock(&conn->chan_lock);

	if (scid) {
		chan = __l2cap_get_chan_by_scid(conn, scid);
		if (!chan) {
			err = -EBADSLT;
			goto unlock;
		}
	} else {
		chan = __l2cap_get_chan_by_ident(conn, cmd->ident);
		if (!chan) {
			err = -EBADSLT;
			goto unlock;
		}
	}

	err = 0;

	l2cap_chan_lock(chan);

	switch (result) {
	case L2CAP_CR_SUCCESS:
		l2cap_state_change(chan, BT_CONFIG);
		chan->ident = 0;
		chan->dcid = dcid;
		clear_bit(CONF_CONNECT_PEND, &chan->conf_state);

		if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state))
			break;

		l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
			       l2cap_build_conf_req(chan, req, sizeof(req)), req);
		chan->num_conf_req++;
		break;

	case L2CAP_CR_PEND:
		set_bit(CONF_CONNECT_PEND, &chan->conf_state);
		break;

	default:
		l2cap_chan_del(chan, ECONNREFUSED);
		break;
	}

	l2cap_chan_unlock(chan);

unlock:
	mutex_unlock(&conn->chan_lock);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 183 57.01% 9 40.91%
Andrei Emeltchenko 51 15.89% 2 9.09%
Linus Torvalds 37 11.53% 1 4.55%
Marcel Holtmann 22 6.85% 4 18.18%
Johan Hedberg 19 5.92% 2 9.09%
Ben Seri 5 1.56% 1 4.55%
João Paulo Rechi Vita 2 0.62% 1 4.55%
Maksim Krasnyanskiy 1 0.31% 1 4.55%
Mat Martineau 1 0.31% 1 4.55%
Total 321 100.00% 22 100.00%



static inline void set_default_fcs(struct l2cap_chan *chan)
{
	/* FCS is enabled only in ERTM or streaming mode, if one or both
         * sides request it.
         */
	if (chan->mode != L2CAP_MODE_ERTM && chan->mode != L2CAP_MODE_STREAMING)
		chan->fcs = L2CAP_FCS_NONE;
	else if (!test_bit(CONF_RECV_NO_FCS, &chan->conf_state))
		chan->fcs = L2CAP_FCS_CRC16;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 39 73.58% 1 16.67%
Gustavo Fernando Padovan 13 24.53% 4 66.67%
Andrei Emeltchenko 1 1.89% 1 16.67%
Total 53 100.00% 6 100.00%



static void l2cap_send_efs_conf_rsp(struct l2cap_chan *chan, void *data,
				    u8 ident, u16 flags)
{
	struct l2cap_conn *conn = chan->conn;

	BT_DBG("conn %p chan %p ident %d flags 0x%4.4x", conn, chan, ident,
	       flags);

	clear_bit(CONF_LOC_CONF_PEND, &chan->conf_state);
	set_bit(CONF_OUTPUT_DONE, &chan->conf_state);

	l2cap_send_cmd(conn, ident, L2CAP_CONF_RSP,
		       l2cap_build_conf_rsp(chan, data,
					    L2CAP_CONF_SUCCESS, flags), data);
}

Contributors
Person Tokens Prop Commits CommitProp
Andrei Emeltchenko 85 100.00% 1 100.00%
Total 85 100.00% 1 100.00%



static void cmd_reject_invalid_cid(struct l2cap_conn *conn, u8 ident,
				   u16 scid, u16 dcid)
{
	struct l2cap_cmd_rej_cid rej;

	rej.reason = cpu_to_le16(L2CAP_REJ_INVALID_CID);
	rej.scid = __cpu_to_le16(scid);
	rej.dcid = __cpu_to_le16(dcid);

	l2cap_send_cmd(conn, ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 67 98.53% 1 50.00%
Joe Perches 1 1.47% 1 50.00%
Total 68 100.00% 2 100.00%



static inline int l2cap_config_req(struct l2cap_conn *conn,
				   struct l2cap_cmd_hdr *cmd, u16 cmd_len,
				   u8 *data)
{
	struct l2cap_conf_req *req = (struct l2cap_conf_req *) data;
	u16 dcid, flags;
	u8 rsp[64];
	struct l2cap_chan *chan;
	int len, err = 0;

	if (cmd_len < sizeof(*req))
		return -EPROTO;

	dcid  = __le16_to_cpu(req->dcid);
	flags = __le16_to_cpu(req->flags);

	BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags);

	chan = l2cap_get_chan_by_scid(conn, dcid);
	if (!chan) {
		cmd_reject_invalid_cid(conn, cmd->ident, dcid, 0);
		return 0;
	}

	if (chan->state != BT_CONFIG && chan->state != BT_CONNECT2) {
		cmd_reject_invalid_cid(conn, cmd->ident, chan->scid,
				       chan->dcid);
		goto unlock;
	}

	/* Reject if config buffer is too small. */
	len = cmd_len - sizeof(*req);
	if (chan->conf_len + len > sizeof(chan->conf_req)) {
		l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP,
			       l2cap_build_conf_rsp(chan, rsp,
			       L2CAP_CONF_REJECT, flags), rsp);
		goto unlock;
	}

	/* Store config. */
	memcpy(chan->conf_req + chan->conf_len, req->data, len);
	chan->conf_len += len;

	if (flags & L2CAP_CONF_FLAG_CONTINUATION) {
		/* Incomplete config. Send empty response. */
		l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP,
			       l2cap_build_conf_rsp(chan, rsp,
			       L2CAP_CONF_SUCCESS, flags), rsp);
		goto unlock;
	}

	/* Complete config. */
	len = l2cap_parse_conf_req(chan, rsp, sizeof(rsp));
	if (len < 0) {
		l2cap_send_disconn_req(chan, ECONNRESET);
		goto unlock;
	}

	chan->ident = cmd->ident;
	l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp);
	chan->num_conf_rsp++;

	/* Reset config buffer. */
	chan->conf_len = 0;

	if (!test_bit(CONF_OUTPUT_DONE, &chan->conf_state))
		goto unlock;

	if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) {
		set_default_fcs(chan);

		if (chan->mode == L2CAP_MODE_ERTM ||
		    chan->mode == L2CAP_MODE_STREAMING)
			err = l2cap_ertm_init(chan);

		if (err < 0)
			l2cap_send_disconn_req(chan, -err);
		else
			l2cap_chan_ready(chan);

		goto unlock;
	}

	if (!test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) {
		u8 buf[64];
		l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
			       l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
		chan->num_conf_req++;
	}

	/* Got Conf Rsp PENDING from remote side and assume we sent
           Conf Rsp PENDING in the code above */
	if (test_bit(CONF_REM_CONF_PEND, &chan->conf_state) &&
	    test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) {

		/* check compatibility */

		/* Send rsp for BR/EDR channel */
		if (!chan->hs_hcon)
			l2cap_send_efs_conf_rsp(chan, rsp, cmd->ident, flags);
		else
			chan->ident = cmd->ident;
	}

unlock:
	l2cap_chan_unlock(chan);
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 273 49.82% 15 34.09%
Linus Torvalds 60 10.95% 2 4.55%
Andrei Emeltchenko 58 10.58% 8 18.18%
Johan Hedberg 37 6.75% 2 4.55%
Mat Martineau 37 6.75% 4 9.09%
Marcel Holtmann 21 3.83% 3 6.82%
Maksim Krasnyanskiy 21 3.83% 2 4.55%
Maxim Krasnyansky 20 3.65% 1 2.27%
Ben Seri 10 1.82% 1 2.27%
Thomas Graf 3 0.55% 1 2.27%
John W. Linville 2 0.36% 1 2.27%
David S. Miller 2 0.36% 1 2.27%
Arnaldo Carvalho de Melo 2 0.36% 1 2.27%
Hideaki Yoshifuji / 吉藤英明 1 0.18% 1 2.27%
Stephen Hemminger 1 0.18% 1 2.27%
Total 548 100.00% 44 100.00%



static inline int l2cap_config_rsp(struct l2cap_conn *conn,
				   struct l2cap_cmd_hdr *cmd, u16 cmd_len,
				   u8 *data)
{
	struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data;
	u16 scid, flags, result;
	struct l2cap_chan *chan;
	int len = cmd_len - sizeof(*rsp);
	int err = 0;

	if (cmd_len < sizeof(*rsp))
		return -EPROTO;

	scid   = __le16_to_cpu(rsp->scid);
	flags  = __le16_to_cpu(rsp->flags);
	result = __le16_to_cpu(rsp->result);

	BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x len %d", scid, flags,
	       result, len);

	chan = l2cap_get_chan_by_scid(conn, scid);
	if (!chan)
		return 0;

	switch (result) {
	case L2CAP_CONF_SUCCESS:
		l2cap_conf_rfc_get(chan, rsp->data, len);
		clear_bit(CONF_REM_CONF_PEND, &chan->conf_state);
		break;

	case L2CAP_CONF_PENDING:
		set_bit(CONF_REM_CONF_PEND, &chan->conf_state);

		if (test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) {
			char buf[64];

			len = l2cap_parse_conf_rsp(chan, rsp->data, len,
						   buf, sizeof(buf), &result);
			if (len < 0) {
				l2cap_send_disconn_req(chan, ECONNRESET);
				goto done;
			}

			if (!chan->hs_hcon) {
				l2cap_send_efs_conf_rsp(chan, buf, cmd->ident,
							0);
			} else {
				if (l2cap_check_efs(chan)) {
					amp_create_logical_link(chan);
					chan->ident = cmd->ident;
				}
			}
		}
		goto done;

	case L2CAP_CONF_UNACCEPT:
		if (chan->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) {
			char req[64];

			if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) {
				l2cap_send_disconn_req(chan, ECONNRESET);
				goto done;
			}

			/* throw out any old stored conf requests */
			result = L2CAP_CONF_SUCCESS;
			len = l2cap_parse_conf_rsp(chan, rsp->data, len,
						   req, sizeof(req), &result);
			if (len < 0) {
				l2cap_send_disconn_req(chan, ECONNRESET);
				goto done;
			}

			l2cap_send_cmd(conn, l2cap_get_ident(conn),
				       L2CAP_CONF_REQ, len, req);
			chan->num_conf_req++;
			if (result != L2CAP_CONF_SUCCESS)
				goto done;
			break;
		}

	default:
		l2cap_chan_set_err(chan, ECONNRESET);

		__set_chan_timer(chan, L2CAP_DISC_REJ_TIMEOUT);
		l2cap_send_disconn_req(chan, ECONNRESET);
		goto done;
	}

	if (flags & L2CAP_CONF_FLAG_CONTINUATION)
		goto done;

	set_bit(CONF_INPUT_DONE, &chan->conf_state);

	if (test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) {
		set_default_fcs(chan);

		if (chan->mode == L2CAP_MODE_ERTM ||
		    chan->mode == L2CAP_MODE_STREAMING)
			err = l2cap_ertm_init(chan);

		if (err < 0)
			l2cap_send_disconn_req(chan, -err);
		else
			l2cap_chan_ready(chan);
	}

done:
	l2cap_chan_unlock(chan);
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 218 41.37% 15 40.54%
Andrei Emeltchenko 165 31.31% 11 29.73%
Linus Torvalds 77 14.61% 2 5.41%
Mat Martineau 30 5.69% 3 8.11%
Johan Hedberg 18 3.42% 1 2.70%
Ben Seri 10 1.90% 1 2.70%
Maksim Krasnyanskiy 5 0.95% 1 2.70%
Marcel Holtmann 3 0.57% 2 5.41%
Andrzej Kaczmarek 1 0.19% 1 2.70%
Total 527 100.00% 37 100.00%



static inline int l2cap_disconnect_req(struct l2cap_conn *conn,
				       struct l2cap_cmd_hdr *cmd, u16 cmd_len,
				       u8 *data)
{
	struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data;
	struct l2cap_disconn_rsp rsp;
	u16 dcid, scid;
	struct l2cap_chan *chan;

	if (cmd_len != sizeof(*req))
		return -EPROTO;

	scid = __le16_to_cpu(req->scid);
	dcid = __le16_to_cpu(req->dcid);

	BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid);

	mutex_lock(&conn->chan_lock);

	chan = __l2cap_get_chan_by_scid(conn, dcid);
	if (!chan) {
		mutex_unlock(&conn->chan_lock);
		cmd_reject_invalid_cid(conn, cmd->ident, dcid, scid);
		return 0;
	}

	l2cap_chan_lock(chan);

	rsp.dcid = cpu_to_le16(chan->scid);
	rsp.scid = cpu_to_le16(chan->dcid);
	l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp);

	chan->ops->set_shutdown(chan);

	l2cap_chan_hold(chan);
	l2cap_chan_del(chan, ECONNRESET);

	l2cap_chan_unlock(chan);

	chan->ops->close(chan);
	l2cap_chan_put(chan);

	mutex_unlock(&conn->chan_lock);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds 76 32.20% 2 11.11%
Gustavo Fernando Padovan 66 27.97% 7 38.89%
Andrei Emeltchenko 37 15.68% 2 11.11%
Johan Hedberg 31 13.14% 2 11.11%
Mat Martineau 10 4.24% 1 5.56%
Marcel Holtmann 9 3.81% 2 11.11%
Maksim Krasnyanskiy 7 2.97% 2 11.11%
Total 236 100.00% 18 100.00%



static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn,
				       struct l2cap_cmd_hdr *cmd, u16 cmd_len,
				       u8 *data)
{
	struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data;
	u16 dcid, scid;
	struct l2cap_chan *chan;

	if (cmd_len != sizeof(*rsp))
		return -EPROTO;

	scid = __le16_to_cpu(rsp->scid);
	dcid = __le16_to_cpu(rsp->dcid);

	BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid);

	mutex_lock(&conn->chan_lock);

	chan = __l2cap_get_chan_by_scid(conn, scid);
	if (!chan) {
		mutex_unlock(&conn->chan_lock);
		return 0;
	}

	l2cap_chan_lock(chan);

	l2cap_chan_hold(chan);
	l2cap_chan_del(chan, 0);

	l2cap_chan_unlock(chan);

	chan->ops->close(chan);
	l2cap_chan_put(chan);

	mutex_unlock(&conn->chan_lock);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 95 56.21% 6 46.15%
Andrei Emeltchenko 34 20.12% 2 15.38%
Johan Hedberg 17 10.06% 1 7.69%
Mat Martineau 10 5.92% 1 7.69%
Marcel Holtmann 9 5.33% 2 15.38%
Linus Torvalds 4 2.37% 1 7.69%
Total 169 100.00% 13 100.00%



static inline int l2cap_information_req(struct l2cap_conn *conn,
					struct l2cap_cmd_hdr *cmd, u16 cmd_len,
					u8 *data)
{
	struct l2cap_info_req *req = (struct l2cap_info_req *) data;
	u16 type;

	if (cmd_len != sizeof(*req))
		return -EPROTO;

	type = __le16_to_cpu(req->type);

	BT_DBG("type 0x%4.4x", type);

	if (type == L2CAP_IT_FEAT_MASK) {
		u8 buf[8];
		u32 feat_mask = l2cap_feat_mask;
		struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf;
		rsp->type   = cpu_to_le16(L2CAP_IT_FEAT_MASK);
		rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS);
		if (!disable_ertm)
			feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING
				| L2CAP_FEAT_FCS;
		if (conn->local_fixed_chan & L2CAP_FC_A2MP)
			feat_mask |= L2CAP_FEAT_EXT_FLOW
				| L2CAP_FEAT_EXT_WINDOW;

		put_unaligned_le32(feat_mask, rsp->data);
		l2cap_send_cmd(conn, cmd->ident, L2CAP_INFO_RSP, sizeof(buf),
			       buf);
	} else if (type == L2CAP_IT_FIXED_CHAN) {
		u8 buf[12];
		struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf;

		rsp->type   = cpu_to_le16(L2CAP_IT_FIXED_CHAN);
		rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS);
		rsp->data[0] = conn->local_fixed_chan;
		memset(rsp->data + 1, 0, 7);
		l2cap_send_cmd(conn, cmd->ident, L2CAP_INFO_RSP, sizeof(buf),
			       buf);
	} else {
		struct l2cap_info_rsp rsp;
		rsp.type   = cpu_to_le16(type);
		rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP);
		l2cap_send_cmd(conn, cmd->ident, L2CAP_INFO_RSP, sizeof(rsp),
			       &rsp);
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 224 73.20% 6 35.29%
Johan Hedberg 36 11.76% 2 11.76%
Linus Torvalds 23 7.52% 2 11.76%
Andrei Emeltchenko 12 3.92% 3 17.65%
Marcel Holtmann 6 1.96% 3 17.65%
Joe Perches 5 1.63% 1 5.88%
Total 306 100.00% 17 100.00%



static inline int l2cap_information_rsp(struct l2cap_conn *conn,
					struct l2cap_cmd_hdr *cmd, u16 cmd_len,
					u8 *data)
{
	struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data;
	u16 type, result;

	if (cmd_len < sizeof(*rsp))
		return -EPROTO;

	type   = __le16_to_cpu(rsp->type);
	result = __le16_to_cpu(rsp->result);

	BT_DBG("type 0x%4.4x result 0x%2.2x", type, result);

	/* L2CAP Info req/rsp are unbound to channels, add extra checks */
	if (cmd->ident != conn->info_ident ||
	    conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)
		return 0;

	cancel_delayed_work(&conn->info_timer);

	if (result != L2CAP_IR_SUCCESS) {
		conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
		conn->info_ident = 0;

		l2cap_conn_start(conn);

		return 0;
	}

	switch (type) {
	case L2CAP_IT_FEAT_MASK:
		conn->feat_mask = get_unaligned_le32(rsp->data);

		if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) {
			struct l2cap_info_req req;
			req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN);

			conn->info_ident = l2cap_get_ident(conn);

			l2cap_send_cmd(conn, conn->info_ident,
				       L2CAP_INFO_REQ, sizeof(req), &req);
		} else {
			conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
			conn->info_ident = 0;

			l2cap_conn_start(conn);
		}
		break;

	case L2CAP_IT_FIXED_CHAN:
		conn->remote_fixed_chan = rsp->data[0];
		conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
		conn->info_ident = 0;

		l2cap_conn_start(conn);
		break;
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 113 42.64% 2 14.29%
Linus Torvalds 61 23.02% 2 14.29%
Andrei Emeltchenko 38 14.34% 2 14.29%
Ville Tervo 27 10.19% 1 7.14%
Johan Hedberg 17 6.42% 2 14.29%
Maksim Krasnyanskiy 5 1.89% 1 7.14%
Marcel Holtmann 1 0.38% 1 7.14%
Jaganath Kanakkassery 1 0.38% 1 7.14%
Ulisses Furquim 1 0.38% 1 7.14%
Joe Perches 1 0.38% 1 7.14%
Total 265 100.00% 14 100.00%



static int l2cap_create_channel_req(struct l2cap_conn *conn,
				    struct l2cap_cmd_hdr *cmd,
				    u16 cmd_len, void *data)
{
	struct l2cap_create_chan_req *req = data;
	struct l2cap_create_chan_rsp rsp;
	struct l2cap_chan *chan;
	struct hci_dev *hdev;
	u16 psm, scid;

	if (cmd_len != sizeof(*req))
		return -EPROTO;

	if (!(conn->local_fixed_chan & L2CAP_FC_A2MP))
		return -EINVAL;

	psm = le16_to_cpu(req->psm);
	scid = le16_to_cpu(req->scid);

	BT_DBG("psm 0x%2.2x, scid 0x%4.4x, amp_id %d", psm, scid, req->amp_id);

	/* For controller id 0 make BR/EDR connection */
	if (req->amp_id == AMP_ID_BREDR) {
		l2cap_connect(conn, cmd, data, L2CAP_CREATE_CHAN_RSP,
			      req->amp_id);
		return 0;
	}

	/* Validate AMP controller id */
	hdev = hci_dev_get(req->amp_id);
	if (!hdev)
		goto error;

	if (hdev->dev_type != HCI_AMP || !test_bit(HCI_UP, &hdev->flags)) {
		hci_dev_put(hdev);
		goto error;
	}

	chan = l2cap_connect(conn, cmd, data, L2CAP_CREATE_CHAN_RSP,
			     req->amp_id);
	if (chan) {
		struct amp_mgr *mgr = conn->hcon->amp_mgr;
		struct hci_conn *hs_hcon;

		hs_hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK,
						  &conn->hcon->dst);
		if (!hs_hcon) {
			hci_dev_put(hdev);
			cmd_reject_invalid_cid(conn, cmd->ident, chan->scid,
					       chan->dcid);
			return 0;
		}

		BT_DBG("mgr %p bredr_chan %p hs_hcon %p", mgr, chan, hs_hcon);

		mgr->bredr_chan = chan;
		chan->hs_hcon = hs_hcon;
		chan->fcs = L2CAP_FCS_NONE;
		conn->mtu = hdev->block_mtu;
	}

	hci_dev_put(hdev);

	return 0;

error:
	rsp.dcid = 0;
	rsp.scid = cpu_to_le16(scid);
	rsp.result = cpu_to_le16(L2CAP_CR_BAD_AMP);
	rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);

	l2cap_send_cmd(conn, cmd->ident, L2CAP_CREATE_CHAN_RSP,
		       sizeof(rsp), &rsp);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 181 48.40% 2 15.38%
Andrei Emeltchenko 161 43.05% 4 30.77%
Johan Hedberg 24 6.42% 3 23.08%
Marcel Holtmann 6 1.60% 3 23.08%
Joe Perches 2 0.53% 1 7.69%
Total 374 100.00% 13 100.00%



static void l2cap_send_move_chan_req(struct l2cap_chan *chan, u8 dest_amp_id)
{
	struct l2cap_move_chan_req req;
	u8 ident;

	BT_DBG("chan %p, dest_amp_id %d", chan, dest_amp_id);

	ident = l2cap_get_ident(chan->conn);
	chan->ident = ident;

	req.icid = cpu_to_le16(chan->scid);
	req.dest_amp_id = dest_amp_id;

	l2cap_send_cmd(chan->conn, ident, L2CAP_MOVE_CHAN_REQ, sizeof(req),
		       &req);

	__set_chan_timer(chan, L2CAP_MOVE_TIMEOUT);
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 88 100.00% 1 100.00%
Total 88 100.00% 1 100.00%



static void l2cap_send_move_chan_rsp(struct l2cap_chan *chan, u16 result)
{
	struct l2cap_move_chan_rsp rsp;

	BT_DBG("chan %p, result 0x%4.4x", chan, result);

	rsp.icid = cpu_to_le16(chan->dcid);
	rsp.result = cpu_to_le16(result);

	l2cap_send_cmd(chan->conn, chan->ident, L2CAP_MOVE_CHAN_RSP,
		       sizeof(rsp), &rsp);
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 68 100.00% 2 100.00%
Total 68 100.00% 2 100.00%



static void l2cap_send_move_chan_cfm(struct l2cap_chan *chan, u16 result)
{
	struct l2cap_move_chan_cfm cfm;

	BT_DBG("chan %p, result 0x%4.4x", chan, result);

	chan->ident = l2cap_get_ident(chan->conn);

	cfm.icid = cpu_to_le16(chan->scid);
	cfm.result = cpu_to_le16(result);

	l2cap_send_cmd(chan->conn, chan->ident, L2CAP_MOVE_CHAN_CFM,
		       sizeof(cfm), &cfm);

	__set_chan_timer(chan, L2CAP_MOVE_TIMEOUT);
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 86 100.00% 2 100.00%
Total 86 100.00% 2 100.00%



static void l2cap_send_move_chan_cfm_icid(struct l2cap_conn *conn, u16 icid)
{
	struct l2cap_move_chan_cfm cfm;

	BT_DBG("conn %p, icid 0x%4.4x", conn, icid);

	cfm.icid = cpu_to_le16(icid);
	cfm.result = cpu_to_le16(L2CAP_MC_UNCONFIRMED);

	l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_MOVE_CHAN_CFM,
		       sizeof(cfm), &cfm);
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 64 98.46% 2 66.67%
Joe Perches 1 1.54% 1 33.33%
Total 65 100.00% 3 100.00%



static void l2cap_send_move_chan_cfm_rsp(struct l2cap_conn *conn, u8 ident,
					 u16 icid)
{
	struct l2cap_move_chan_cfm_rsp rsp;

	BT_DBG("icid 0x%4.4x", icid);

	rsp.icid = cpu_to_le16(icid);
	l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_CFM_RSP, sizeof(rsp), &rsp);
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 53 98.15% 1 50.00%
Andrei Emeltchenko 1 1.85% 1 50.00%
Total 54 100.00% 2 100.00%



static void __release_logical_link(struct l2cap_chan *chan)
{
	chan->hs_hchan = NULL;
	chan->hs_hcon = NULL;

	/* Placeholder - release the logical link */
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%



static void l2cap_logical_fail(struct l2cap_chan *chan)
{
	/* Logical link setup failed */
	if (chan->state != BT_CONNECTED) {
		/* Create channel failure, disconnect */
		l2cap_send_disconn_req(chan, ECONNRESET);
		return;
	}

	switch (chan->move_role) {
	case L2CAP_MOVE_ROLE_RESPONDER:
		l2cap_move_done(chan);
		l2cap_send_move_chan_rsp(chan, L2CAP_MR_NOT_SUPP);
		break;
	case L2CAP_MOVE_ROLE_INITIATOR:
		if (chan->move_state == L2CAP_MOVE_WAIT_LOGICAL_COMP ||
		    chan->move_state == L2CAP_MOVE_WAIT_LOGICAL_CFM) {
			/* Remote has only sent pending or
                         * success responses, clean up
                         */
			l2cap_move_done(chan);
		}

		/* Other amp move states imply that the move
                 * has already aborted
                 */
		l2cap_send_move_chan_cfm(chan, L2CAP_MC_UNCONFIRMED);
		break;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 89 100.00% 4 100.00%
Total 89 100.00% 4 100.00%



static void l2cap_logical_finish_create(struct l2cap_chan *chan,
					struct hci_chan *hchan)
{
	struct l2cap_conf_rsp rsp;

	chan->hs_hchan = hchan;
	chan->hs_hcon->l2cap_data = chan->conn;

	l2cap_send_efs_conf_rsp(chan, &rsp, chan->ident, 0);

	if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) {
		int err;

		set_default_fcs(chan);

		err = l2cap_ertm_init(chan);
		if (err < 0)
			l2cap_send_disconn_req(chan, -err);
		else
			l2cap_chan_ready(chan);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 96 96.97% 2 50.00%
Andrei Emeltchenko 3 3.03% 2 50.00%
Total 99 100.00% 4 100.00%



static void l2cap_logical_finish_move(struct l2cap_chan *chan,
				      struct hci_chan *hchan)
{
	chan->hs_hcon = hchan->conn;
	chan->hs_hcon->l2cap_data = chan->conn;

	BT_DBG("move_state %d", chan->move_state);

	switch (chan->move_state) {
	case L2CAP_MOVE_WAIT_LOGICAL_COMP:
		/* Move confirm will be sent after a success
                 * response is received
                 */
		chan->move_state = L2CAP_MOVE_WAIT_RSP_SUCCESS;
		break;
	case L2CAP_MOVE_WAIT_LOGICAL_CFM:
		if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) {
			chan->move_state = L2CAP_MOVE_WAIT_LOCAL_BUSY;
		} else if (chan->move_role == L2CAP_MOVE_ROLE_INITIATOR) {
			chan->move_state = L2CAP_MOVE_WAIT_CONFIRM_RSP;
			l2cap_send_move_chan_cfm(chan, L2CAP_MC_CONFIRMED);
		} else if (chan->move_role == L2CAP_MOVE_ROLE_RESPONDER) {
			chan->move_state = L2CAP_MOVE_WAIT_CONFIRM;
			l2cap_send_move_chan_rsp(chan, L2CAP_MR_SUCCESS);
		}
		break;
	default:
		/* Move was not in expected state, free the channel */
		__release_logical_link(chan);

		chan->move_state = L2CAP_MOVE_STABLE;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 147 100.00% 1 100.00%
Total 147 100.00% 1 100.00%

/* Call with chan locked */


void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
		       u8 status)
{
	BT_DBG("chan %p, hchan %p, status %d", chan, hchan, status);

	if (status) {
		l2cap_logical_fail(chan);
		__release_logical_link(chan);
		return;
	}

	if (chan->state != BT_CONNECTED) {
		/* Ignore logical link if channel is on BR/EDR */
		if (chan->local_amp_id != AMP_ID_BREDR)
			l2cap_logical_finish_create(chan, hchan);
	} else {
		l2cap_logical_finish_move(chan, hchan);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 80 97.56% 2 66.67%
Marcel Holtmann 2 2.44% 1 33.33%
Total 82 100.00% 3 100.00%



void l2cap_move_start(struct l2cap_chan *chan)
{
	BT_DBG("chan %p", chan);

	if (chan->local_amp_id == AMP_ID_BREDR) {
		if (chan->chan_policy != BT_CHANNEL_POLICY_AMP_PREFERRED)
			return;
		chan->move_role = L2CAP_MOVE_ROLE_INITIATOR;
		chan->move_state = L2CAP_MOVE_WAIT_PREPARE;
		/* Placeholder - start physical link setup */
	} else {
		chan->move_role = L2CAP_MOVE_ROLE_INITIATOR;
		chan->move_state = L2CAP_MOVE_WAIT_RSP_SUCCESS;
		chan->move_id = 0;
		l2cap_move_setup(chan);
		l2cap_send_move_chan_req(chan, 0);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 81 98.78% 2 66.67%
Marcel Holtmann 1 1.22% 1 33.33%
Total 82 100.00% 3 100.00%



static void l2cap_do_create(struct l2cap_chan *chan, int result,
			    u8 local_amp_id, u8 remote_amp_id)
{
	BT_DBG("chan %p state %s %u -> %u", chan, state_to_string(chan->state),
	       local_amp_id, remote_amp_id);

	chan->fcs = L2CAP_FCS_NONE;

	/* Outgoing channel on AMP */
	if (chan->state == BT_CONNECT) {
		if (result == L2CAP_CR_SUCCESS) {
			chan->local_amp_id = local_amp_id;
			l2cap_send_create_chan_req(chan, remote_amp_id);
		} else {
			/* Revert to BR/EDR connect */
			l2cap_send_conn_req(chan);
		}

		return;
	}

	/* Incoming channel on AMP */
	if (__l2cap_no_conn_pending(chan)) {
		struct l2cap_conn_rsp rsp;
		char buf[128];
		rsp.scid = cpu_to_le16(chan->dcid);
		rsp.dcid = cpu_to_le16(chan->scid);

		if (result == L2CAP_CR_SUCCESS) {
			/* Send successful response */
			rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS);
			rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
		} else {
			/* Send negative response */
			rsp.result = cpu_to_le16(L2CAP_CR_NO_MEM);
			rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
		}

		l2cap_send_cmd(chan->conn, chan->ident, L2CAP_CREATE_CHAN_RSP,
			       sizeof(rsp), &rsp);

		if (result == L2CAP_CR_SUCCESS) {
			l2cap_state_change(chan, BT_CONFIG);
			set_bit(CONF_REQ_SENT, &chan->conf_state);
			l2cap_send_cmd(chan->conn, l2cap_get_ident(chan->conn),
				       L2CAP_CONF_REQ,
				       l2cap_build_conf_req(chan, buf, sizeof(buf)), buf);
			chan->num_conf_req++;
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 181 70.16% 1 16.67%
Andrei Emeltchenko 67 25.97% 2 33.33%
Ben Seri 5 1.94% 1 16.67%
Joe Perches 4 1.55% 1 16.67%
Gustavo Fernando Padovan 1 0.39% 1 16.67%
Total 258 100.00% 6 100.00%



static void l2cap_do_move_initiate(struct l2cap_chan *chan, u8 local_amp_id,
				   u8 remote_amp_id)
{
	l2cap_move_setup(chan);
	chan->move_id = local_amp_id;
	chan->move_state = L2CAP_MOVE_WAIT_RSP;

	l2cap_send_move_chan_req(chan, remote_amp_id);
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 41 100.00% 1 100.00%
Total 41 100.00% 1 100.00%



static void l2cap_do_move_respond(struct l2cap_chan *chan, int result)
{
	struct hci_chan *hchan = NULL;

	/* Placeholder - get hci_chan for logical link */

	if (hchan) {
		if (hchan->state == BT_CONNECTED) {
			/* Logical link is ready to go */
			chan->hs_hcon = hchan->conn;
			chan->hs_hcon->l2cap_data = chan->conn;
			chan->move_state = L2CAP_MOVE_WAIT_CONFIRM;
			l2cap_send_move_chan_rsp(chan, L2CAP_MR_SUCCESS);

			l2cap_logical_cfm(chan, hchan, L2CAP_MR_SUCCESS);
		} else {
			/* Wait for logical link to be ready */
			chan->move_state = L2CAP_MOVE_WAIT_LOGICAL_CFM;
		}
	} else {
		/* Logical link not available */
		l2cap_send_move_chan_rsp(chan, L2CAP_MR_NOT_ALLOWED);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 100 100.00% 1 100.00%
Total 100 100.00% 1 100.00%



static void l2cap_do_move_cancel(struct l2cap_chan *chan, int result)
{
	if (chan->move_role == L2CAP_MOVE_ROLE_RESPONDER) {
		u8 rsp_result;
		if (result == -EINVAL)
			rsp_result = L2CAP_MR_BAD_ID;
		else
			rsp_result = L2CAP_MR_NOT_ALLOWED;

		l2cap_send_move_chan_rsp(chan, rsp_result);
	}

	chan->move_role = L2CAP_MOVE_ROLE_NONE;
	chan->move_state = L2CAP_MOVE_STABLE;

	/* Restart data transmission */
	l2cap_ertm_send(chan);
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 68 100.00% 1 100.00%
Total 68 100.00% 1 100.00%

/* Invoke with locked chan */


void __l2cap_physical_cfm(struct l2cap_chan *chan, int result)
{
	u8 local_amp_id = chan->local_amp_id;
	u8 remote_amp_id = chan->remote_amp_id;

	BT_DBG("chan %p, result %d, local_amp_id %d, remote_amp_id %d",
	       chan, result, local_amp_id, remote_amp_id);

	if (chan->state == BT_DISCONN || chan->state == BT_CLOSED) {
		l2cap_chan_unlock(chan);
		return;
	}

	if (chan->state != BT_CONNECTED) {
		l2cap_do_create(chan, result, local_amp_id, remote_amp_id);
	} else if (result != L2CAP_MR_SUCCESS) {
		l2cap_do_move_cancel(chan, result);
	} else {
		switch (chan->move_role) {
		case L2CAP_MOVE_ROLE_INITIATOR:
			l2cap_do_move_initiate(chan, local_amp_id,
					       remote_amp_id);
			break;
		case L2CAP_MOVE_ROLE_RESPONDER:
			l2cap_do_move_respond(chan, result);
			break;
		default:
			l2cap_do_move_cancel(chan, result);
			break;
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 130 90.91% 1 25.00%
Andrei Emeltchenko 13 9.09% 3 75.00%
Total 143 100.00% 4 100.00%



static inline int l2cap_move_channel_req(struct l2cap_conn *conn,
					 struct l2cap_cmd_hdr *cmd,
					 u16 cmd_len, void *data)
{
	struct l2cap_move_chan_req *req = data;
	struct l2cap_move_chan_rsp rsp;
	struct l2cap_chan *chan;
	u16 icid = 0;
	u16 result = L2CAP_MR_NOT_ALLOWED;

	if (cmd_len != sizeof(*req))
		return -EPROTO;

	icid = le16_to_cpu(req->icid);

	BT_DBG("icid 0x%4.4x, dest_amp_id %d", icid, req->dest_amp_id);

	if (!(conn->local_fixed_chan & L2CAP_FC_A2MP))
		return -EINVAL;

	chan = l2cap_get_chan_by_dcid(conn, icid);
	if (!chan) {
		rsp.icid = cpu_to_le16(icid);
		rsp.result = cpu_to_le16(L2CAP_MR_NOT_ALLOWED);
		l2cap_send_cmd(conn, cmd->ident, L2CAP_MOVE_CHAN_RSP,
			       sizeof(rsp), &rsp);
		return 0;
	}

	chan->ident = cmd->ident;

	if (chan->scid < L2CAP_CID_DYN_START ||
	    chan->chan_policy == BT_CHANNEL_POLICY_BREDR_ONLY ||
	    (chan->mode != L2CAP_MODE_ERTM &&
	     chan->mode != L2CAP_MODE_STREAMING)) {
		result = L2CAP_MR_NOT_ALLOWED;
		goto send_move_response;
	}

	if (chan->local_amp_id == req->dest_amp_id) {
		result = L2CAP_MR_SAME_ID;
		goto send_move_response;
	}

	if (req->dest_amp_id != AMP_ID_BREDR) {
		struct hci_dev *hdev;
		hdev = hci_dev_get(req->dest_amp_id);
		if (!hdev || hdev->dev_type != HCI_AMP ||
		    !test_bit(HCI_UP, &hdev->flags)) {
			if (hdev)
				hci_dev_put(hdev);

			result = L2CAP_MR_BAD_ID;
			goto send_move_response;
		}
		hci_dev_put(hdev);
	}

	/* Detect a move collision.  Only send a collision response
         * if this side has "lost", otherwise proceed with the move.
         * The winner has the larger bd_addr.
         */
	if ((__chan_is_moving(chan) ||
	     chan->move_role != L2CAP_MOVE_ROLE_NONE) &&
	    bacmp(&conn->hcon->src, &conn->hcon->dst) > 0) {
		result = L2CAP_MR_COLLISION;
		goto send_move_response;
	}

	chan->move_role = L2CAP_MOVE_ROLE_RESPONDER;
	l2cap_move_setup(chan);
	chan->move_id = req->dest_amp_id;
	icid = chan->dcid;

	if (req->dest_amp_id == AMP_ID_BREDR) {
		/* Moving to BR/EDR */
		if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) {
			chan->move_state = L2CAP_MOVE_WAIT_LOCAL_BUSY;
			result = L2CAP_MR_PEND;
		} else {
			chan->move_state = L2CAP_MOVE_WAIT_CONFIRM;
			result = L2CAP_MR_SUCCESS;
		}
	} else {
		chan->move_state = L2CAP_MOVE_WAIT_PREPARE;
		/* Placeholder - uncomment when amp functions are available */
		/*amp_accept_physical(chan, req->dest_amp_id);*/
		result = L2CAP_MR_PEND;
	}

send_move_response:
	l2cap_send_move_chan_rsp(chan, result);

	l2cap_chan_unlock(chan);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 418 95.65% 3 33.33%
Marcel Holtmann 13 2.97% 4 44.44%
Johan Hedberg 5 1.14% 1 11.11%
Joe Perches 1 0.23% 1 11.11%
Total 437 100.00% 9 100.00%



static void l2cap_move_continue(struct l2cap_conn *conn, u16 icid, u16 result)
{
	struct l2cap_chan *chan;
	struct hci_chan *hchan = NULL;

	chan = l2cap_get_chan_by_scid(conn, icid);
	if (!chan) {
		l2cap_send_move_chan_cfm_icid(conn, icid);
		return;
	}

	__clear_chan_timer(chan);
	if (result == L2CAP_MR_PEND)
		__set_chan_timer(chan, L2CAP_MOVE_ERTX_TIMEOUT);

	switch (chan->move_state) {
	case L2CAP_MOVE_WAIT_LOGICAL_COMP:
		/* Move confirm will be sent when logical link
                 * is complete.
                 */
		chan->move_state = L2CAP_MOVE_WAIT_LOGICAL_CFM;
		break;
	case L2CAP_MOVE_WAIT_RSP_SUCCESS:
		if (result == L2CAP_MR_PEND) {
			break;
		} else if (test_bit(CONN_LOCAL_BUSY,
				    &chan->conn_state)) {
			chan->move_state = L2CAP_MOVE_WAIT_LOCAL_BUSY;
		} else {
			/* Logical link is up or moving to BR/EDR,
                         * proceed with move
                         */
			chan->move_state = L2CAP_MOVE_WAIT_CONFIRM_RSP;
			l2cap_send_move_chan_cfm(chan, L2CAP_MC_CONFIRMED);
		}
		break;
	case L2CAP_MOVE_WAIT_RSP:
		/* Moving to AMP */
		if (result == L2CAP_MR_SUCCESS) {
			/* Remote is ready, send confirm immediately
                         * after logical link is ready
                         */
			chan->move_state = L2CAP_MOVE_WAIT_LOGICAL_CFM;
		} else {
			/* Both logical link and move success
                         * are required to confirm
                         */
			chan->move_state = L2CAP_MOVE_WAIT_LOGICAL_COMP;
		}

		/* Placeholder - get hci_chan for logical link */
		if (!hchan) {
			/* Logical link not available */
			l2cap_send_move_chan_cfm(chan, L2CAP_MC_UNCONFIRMED);
			break;
		}

		/* If the logical link is not yet connected, do not
                 * send confirmation.
                 */
		if (hchan->state != BT_CONNECTED)
			break;

		/* Logical link is already ready to go */

		chan->hs_hcon = hchan->conn;
		chan->hs_hcon->l2cap_data = chan->conn;

		if (result == L2CAP_MR_SUCCESS) {
			/* Can confirm now */
			l2cap_send_move_chan_cfm(chan, L2CAP_MC_CONFIRMED);
		} else {
			/* Now only need move success
                         * to confirm
                         */
			chan->move_state = L2CAP_MOVE_WAIT_RSP_SUCCESS;
		}

		l2cap_logical_cfm(chan, hchan, L2CAP_MR_SUCCESS);
		break;
	default:
		/* Any other amp move state means the move failed. */
		chan->move_id = chan->local_amp_id;
		l2cap_move_done(chan);
		l2cap_send_move_chan_cfm(chan, L2CAP_MC_UNCONFIRMED);
	}

	l2cap_chan_unlock(chan);
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 279 100.00% 2 100.00%
Total 279 100.00% 2 100.00%



static void l2cap_move_fail(struct l2cap_conn *conn, u8 ident, u16 icid,
			    u16 result)
{
	struct l2cap_chan *chan;

	chan = l2cap_get_chan_by_ident(conn, ident);
	if (!chan) {
		/* Could not locate channel, icid is best guess */
		l2cap_send_move_chan_cfm_icid(conn, icid);
		return;
	}

	__clear_chan_timer(chan);

	if (chan->move_role == L2CAP_MOVE_ROLE_INITIATOR) {
		if (result == L2CAP_MR_COLLISION) {
			chan->move_role = L2CAP_MOVE_ROLE_RESPONDER;
		} else {
			/* Cleanup - cancel move */
			chan->move_id = chan->local_amp_id;
			l2cap_move_done(chan);
		}
	}

	l2cap_send_move_chan_cfm(chan, L2CAP_MC_UNCONFIRMED);

	l2cap_chan_unlock(chan);
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 108 100.00% 2 100.00%
Total 108 100.00% 2 100.00%



static int l2cap_move_channel_rsp(struct l2cap_conn *conn,
				  struct l2cap_cmd_hdr *cmd,
				  u16 cmd_len, void *data)
{
	struct l2cap_move_chan_rsp *rsp = data;
	u16 icid, result;

	if (cmd_len != sizeof(*rsp))
		return -EPROTO;

	icid = le16_to_cpu(rsp->icid);
	result = le16_to_cpu(rsp->result);

	BT_DBG("icid 0x%4.4x, result 0x%4.4x", icid, result);

	if (result == L2CAP_MR_SUCCESS || result == L2CAP_MR_PEND)
		l2cap_move_continue(conn, icid, result);
	else
		l2cap_move_fail(conn, cmd->ident, icid, result);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 112 100.00% 2 100.00%
Total 112 100.00% 2 100.00%



static int l2cap_move_channel_confirm(struct l2cap_conn *conn,
				      struct l2cap_cmd_hdr *cmd,
				      u16 cmd_len, void *data)
{
	struct l2cap_move_chan_cfm *cfm = data;
	struct l2cap_chan *chan;
	u16 icid, result;

	if (cmd_len != sizeof(*cfm))
		return -EPROTO;

	icid = le16_to_cpu(cfm->icid);
	result = le16_to_cpu(cfm->result);

	BT_DBG("icid 0x%4.4x, result 0x%4.4x", icid, result);

	chan = l2cap_get_chan_by_dcid(conn, icid);
	if (!chan) {
		/* Spec requires a response even if the icid was not found */
		l2cap_send_move_chan_cfm_rsp(conn, cmd->ident, icid);
		return 0;
	}

	if (chan->move_state == L2CAP_MOVE_WAIT_CONFIRM) {
		if (result == L2CAP_MC_CONFIRMED) {
			chan->local_amp_id = chan->move_id;
			if (chan->local_amp_id == AMP_ID_BREDR)
				__release_logical_link(chan);
		} else {
			chan->move_id = chan->local_amp_id;
		}

		l2cap_move_done(chan);
	}

	l2cap_send_move_chan_cfm_rsp(conn, cmd->ident, icid);

	l2cap_chan_unlock(chan);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 159 85.48% 2 28.57%
Gustavo Fernando Padovan 12 6.45% 1 14.29%
Linus Torvalds 9 4.84% 1 14.29%
Ville Tervo 3 1.61% 1 14.29%
Marcel Holtmann 2 1.08% 1 14.29%
Andrei Emeltchenko 1 0.54% 1 14.29%
Total 186 100.00% 7 100.00%



static inline int l2cap_move_channel_confirm_rsp(struct l2cap_conn *conn,
						 struct l2cap_cmd_hdr *cmd,
						 u16 cmd_len, void *data)
{
	struct l2cap_move_chan_cfm_rsp *rsp = data;
	struct l2cap_chan *chan;
	u16 icid;

	if (cmd_len != sizeof(*rsp))
		return -EPROTO;

	icid = le16_to_cpu(rsp->icid);

	BT_DBG("icid 0x%4.4x", icid);

	chan = l2cap_get_chan_by_scid(conn, icid);
	if (!chan)
		return 0;

	__clear_chan_timer(chan);

	if (chan->move_state == L2CAP_MOVE_WAIT_CONFIRM_RSP) {
		chan->local_amp_id = chan->move_id;

		if (chan->local_amp_id == AMP_ID_BREDR && chan->hs_hchan)
			__release_logical_link(chan);

		l2cap_move_done(chan);
	}

	l2cap_chan_unlock(chan);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 124 89.21% 2 25.00%
Gustavo Fernando Padovan 8 5.76% 2 25.00%
Marcel Holtmann 3 2.16% 2 25.00%
Linus Torvalds 3 2.16% 1 12.50%
Andrei Emeltchenko 1 0.72% 1 12.50%
Total 139 100.00% 8 100.00%



static inline int l2cap_conn_param_update_req(struct l2cap_conn *conn,
					      struct l2cap_cmd_hdr *cmd,
					      u16 cmd_len, u8 *data)
{
	struct hci_conn *hcon = conn->hcon;
	struct l2cap_conn_param_update_req *req;
	struct l2cap_conn_param_update_rsp rsp;
	u16 min, max, latency, to_multiplier;
	int err;

	if (hcon->role != HCI_ROLE_MASTER)
		return -EINVAL;

	if (cmd_len != sizeof(struct l2cap_conn_param_update_req))
		return -EPROTO;

	req = (struct l2cap_conn_param_update_req *) data;
	min		= __le16_to_cpu(req->min);
	max		= __le16_to_cpu(req->max);
	latency		= __le16_to_cpu(req->latency);
	to_multiplier	= __le16_to_cpu(req->to_multiplier);

	BT_DBG("min 0x%4.4x max 0x%4.4x latency: 0x%4.4x Timeout: 0x%4.4x",
	       min, max, latency, to_multiplier);

	memset(&rsp, 0, sizeof(rsp));

	err = hci_check_conn_params(min, max, latency, to_multiplier);
	if (err)
		rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_REJECTED);
	else
		rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_ACCEPTED);

	l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_PARAM_UPDATE_RSP,
		       sizeof(rsp), &rsp);

	if (!err) {
		u8 store_hint;

		store_hint = hci_le_conn_update(hcon, min, max, latency,
						to_multiplier);
		mgmt_new_conn_param(hcon->hdev, &hcon->dst, hcon->dst_type,
				    store_hint, min, max, latency,
				    to_multiplier);

	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Claudio Takahasi 215 82.69% 2 25.00%
Johan Hedberg 25 9.62% 3 37.50%
Andre Guedes 18 6.92% 2 25.00%
Joe Perches 2 0.77% 1 12.50%
Total 260 100.00% 8 100.00%



static int l2cap_le_connect_rsp(struct l2cap_conn *conn,
				struct l2cap_cmd_hdr *cmd, u16 cmd_len,
				u8 *data)
{
	struct l2cap_le_conn_rsp *rsp = (struct l2cap_le_conn_rsp *) data;
	struct hci_conn *hcon = conn->hcon;
	u16 dcid, mtu, mps, credits, result;
	struct l2cap_chan *chan;
	int err, sec_level;

	if (cmd_len < sizeof(*rsp))
		return -EPROTO;

	dcid    = __le16_to_cpu(rsp->dcid);
	mtu     = __le16_to_cpu(rsp->mtu);
	mps     = __le16_to_cpu(rsp->mps);
	credits = __le16_to_cpu(rsp->credits);
	result  = __le16_to_cpu(rsp->result);

	if (result == L2CAP_CR_SUCCESS && (mtu < 23 || mps < 23 ||
					   dcid < L2CAP_CID_DYN_START ||
					   dcid > L2CAP_CID_LE_DYN_END))
		return -EPROTO;

	BT_DBG("dcid 0x%4.4x mtu %u mps %u credits %u result 0x%2.2x",
	       dcid, mtu, mps, credits, result);

	mutex_lock(&conn->chan_lock);

	chan = __l2cap_get_chan_by_ident(conn, cmd->ident);
	if (!chan) {
		err = -EBADSLT;
		goto unlock;
	}

	err = 0;

	l2cap_chan_lock(chan);

	switch (result) {
	case L2CAP_CR_SUCCESS:
		if (__l2cap_get_chan_by_dcid(conn, dcid)) {
			err = -EBADSLT;
			break;
		}

		chan->ident = 0;
		chan->dcid = dcid;
		chan->omtu = mtu;
		chan->remote_mps = mps;
		chan->tx_credits = credits;
		l2cap_chan_ready(chan);
		break;

	case L2CAP_CR_AUTHENTICATION:
	case L2CAP_CR_ENCRYPTION:
		/* If we already have MITM protection we can't do
                 * anything.
                 */
		if (hcon->sec_level > BT_SECURITY_MEDIUM) {
			l2cap_chan_del(chan, ECONNREFUSED);
			break;
		}

		sec_level = hcon->sec_level + 1;
		if (chan->sec_level < sec_level)
			chan->sec_level = sec_level;

		/* We'll need to send a new Connect Request */
		clear_bit(FLAG_LE_CONN_REQ_SENT, &chan->flags);

		smp_conn_security(hcon, chan->sec_level);
		break;

	default:
		l2cap_chan_del(chan, ECONNREFUSED);
		break;
	}

	l2cap_chan_unlock(chan);

unlock:
	mutex_unlock(&conn->chan_lock);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 367 100.00% 4 100.00%
Total 367 100.00% 4 100.00%



static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn,
				      struct l2cap_cmd_hdr *cmd, u16 cmd_len,
				      u8 *data)
{
	int err = 0;

	switch (cmd->code) {
	case L2CAP_COMMAND_REJ:
		l2cap_command_rej(conn, cmd, cmd_len, data);
		break;

	case L2CAP_CONN_REQ:
		err = l2cap_connect_req(conn, cmd, cmd_len, data);
		break;

	case L2CAP_CONN_RSP:
	case L2CAP_CREATE_CHAN_RSP:
		l2cap_connect_create_rsp(conn, cmd, cmd_len, data);
		break;

	case L2CAP_CONF_REQ:
		err = l2cap_config_req(conn, cmd, cmd_len, data);
		break;

	case L2CAP_CONF_RSP:
		l2cap_config_rsp(conn, cmd, cmd_len, data);
		break;

	case L2CAP_DISCONN_REQ:
		err = l2cap_disconnect_req(conn, cmd, cmd_len, data);
		break;

	case L2CAP_DISCONN_RSP:
		l2cap_disconnect_rsp(conn, cmd, cmd_len, data);
		break;

	case L2CAP_ECHO_REQ:
		l2cap_send_cmd(conn, cmd->ident, L2CAP_ECHO_RSP, cmd_len, data);
		break;

	case L2CAP_ECHO_RSP:
		break;

	case L2CAP_INFO_REQ:
		err = l2cap_information_req(conn, cmd, cmd_len, data);
		break;

	case L2CAP_INFO_RSP:
		l2cap_information_rsp(conn, cmd, cmd_len, data);
		break;

	case L2CAP_CREATE_CHAN_REQ:
		err = l2cap_create_channel_req(conn, cmd, cmd_len, data);
		break;

	case L2CAP_MOVE_CHAN_REQ:
		err = l2cap_move_channel_req(conn, cmd, cmd_len, data);
		break;

	case L2CAP_MOVE_CHAN_RSP:
		l2cap_move_channel_rsp(conn, cmd, cmd_len, data);
		break;

	case L2CAP_MOVE_CHAN_CFM:
		err = l2cap_move_channel_confirm(conn, cmd, cmd_len, data);
		break;

	case L2CAP_MOVE_CHAN_CFM_RSP:
		l2cap_move_channel_confirm_rsp(conn, cmd, cmd_len, data);
		break;

	default:
		BT_ERR("Unknown BR/EDR signaling command 0x%2.2x", cmd->code);
		err = -EINVAL;
		break;
	}

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Gustavo Fernando Padovan 176 57.52% 4 33.33%
Mat Martineau 65 21.24% 4 33.33%
Maksim Krasnyanskiy 28 9.15% 1 8.33%
Claudio Takahasi 18 5.88% 1 8.33%
Johan Hedberg 16 5.23% 1 8.33%
Linus Torvalds 3 0.98% 1 8.33%
Total 306 100.00% 12 100.00%



static int l2cap_le_connect_req(struct l2cap_conn *conn,
				struct l2cap_cmd_hdr *cmd, u16 cmd_len,
				u8 *data)
{
	struct l2cap_le_conn_req *req = (struct l2cap_le_conn_req *) data;
	struct l2cap_le_conn_rsp rsp;
	struct l2cap_chan *chan, *pchan;
	u16 dcid, scid, credits, mtu, mps;
	__le16 psm;
	u8 result;

	if (cmd_len != sizeof(*req))
		return -EPROTO;

	scid = __le16_to_cpu(req->scid);
	mtu  = __le16_to_cpu(req->mtu);
	mps  = __le16_to_cpu(req->mps);
	psm  = req->psm;
	dcid = 0;
	credits = 0;

	if (mtu < 23 || mps < 23)
		return -EPROTO;

	BT_DBG("psm 0x%2.2x scid 0x%4.4x mtu %u mps %u", __le16_to_cpu(psm),
	       scid, mtu, mps);

	/* Check if we have socket listening on psm */
	pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, &conn->hcon->src,
					 &conn->hcon->dst, LE_LINK);
	if (!pchan) {
		result = L2CAP_CR_BAD_PSM;
		chan = NULL;
		goto response;
	}

	mutex_lock(&conn->chan_lock);
	l2cap_chan_lock(pchan);

	if (!smp_sufficient_security(conn->hcon, pchan->sec_level,
				     SMP_ALLOW_STK)) {
		result = L2CAP_CR_AUTHENTICATION;
		chan = NULL;
		goto response_unlock;
	}

	/* Check for valid dynamic CID range */
	if (scid < L2CAP_CID_DYN_START || scid > L2CAP_CID_LE_DYN_END) {
		result = L2CAP_CR_INVALID_SCID;
		chan = NULL;
		goto response_unlock;
	}

	/* Check if we already have channel with that dcid */
	if (__l2cap_get_chan_by_dcid(conn, scid)) {
		result = L2CAP_CR_SCID_IN_USE;
		chan = NULL;
		goto response_unlock;
	}

	chan = pchan->ops->new_connection(pchan);
	if (!chan) {
		result = L2CAP_CR_NO_MEM;
		goto response_unlock;
	}

	l2cap_le_flowctl_init(chan);

	bacpy(&chan->src, &conn->hcon->src);
	bacpy(&chan->dst, &conn->hcon->dst);
	chan->src_type = bdaddr_src_type(conn->hcon);
	chan->dst_type = bdaddr_dst_type(conn->hcon);
	chan->psm  = psm;
	chan->dcid = scid;
	chan->omtu = mtu;
	chan->remote_mps = mps;
	chan->tx_credits = __le16_to_cpu(req->credits);

	__l2cap_chan_add(conn, chan);
	dcid = chan->scid;
	credits = chan->rx_credits;

	__set_chan_timer(chan, chan->ops->get_sndtimeo(chan));

	chan->ident = cmd->ident;

	if (test_bit(FLAG_DEFER_SETUP, &chan->flags)) {
		l2cap_state_change(chan, BT_CONNECT2);
		/* The following result value is actually not defined
                 * for LE CoC but we use it to let the function know
                 * that it should bail out after doing its cleanup
                 * instead of sending a response.
                 */
		result = L2CAP_CR_PEND;
		chan->ops->defer(chan);
	} else {
		l2cap_chan_ready(chan);
		result = L2CAP_CR_SUCCESS;
	}

response_unlock:
	l2cap_chan_unlock(pchan);
	mutex_unlock(&conn->chan_lock);
	l2cap_chan_put(pchan);

	if (result == L2CAP_CR_PEND)
		return 0;

response:
	if (chan) {
		rsp.mtu = cpu_to_le16(chan->imtu);
		rsp.mps = cpu_to_le16(chan->mps);
	} else {
		rsp.mtu = 0;
		rsp.mps = 0;
	}

	rsp.dcid    = cpu_to_le16(dcid);
	rsp.credits = cpu_to_le16(credits);
	rsp.result  = cpu_to_le16(result);

	l2cap_send_cmd(conn, cmd->ident, L2CAP_LE_CONN_RSP, sizeof(rsp), &rsp);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 592 97.05% 10 90.91%
Claudio Takahasi 18 2.95% 1 9.09%
Total 610 100.00% 11 100.00%



static inline int l2cap_le_credits(struct l2cap_conn *conn,
				   struct l2cap_cmd_hdr *cmd, u16 cmd_len,
				   u8 *data)
{
	struct l2cap_le_credits *pkt;
	struct l2cap_chan *chan;
	u16 cid, credits, max_credits;

	if (cmd_len != sizeof(*pkt))
		return -EPROTO;

	pkt = (struct l2cap_le_credits *) data;
	cid	= __le16_to_cpu(pkt->cid);
	credits	= __le16_to_cpu(pkt->credits);

	BT_DBG("cid 0x%4.4x credits 0x%4.4x", cid, credits);

	chan = l2cap_get_chan_by_dcid(conn, cid);
	if (!chan)
		return -EBADSLT;

	max_credits = LE_FLOWCTL_MAX_CREDITS - chan->tx_credits;
	if (credits > max_credits) {
		BT_ERR("LE credits overflow");
		l2cap_send_disconn_req(chan, ECONNRESET);
		l2cap_chan_unlock(chan);

		/* Return 0 so that we don't trigger an unnecessary
                 * command reject packet.
                 */
		return 0;
	}

	chan->tx_credits += credits;

	/* Resume sending */
	l2cap_le_flowctl_send(chan);

	if (chan->tx_credits)
		chan->ops->resume(chan);

	l2cap_chan_unlock(chan);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 174 96.13% 2 50.00%
Martin Townsend 5 2.76% 1 25.00%
Luiz Augusto von Dentz 2 1.10% 1 25.00%
Total 181 100.00% 4 100.00%



static inline int l2cap_le_command_rej(struct l2cap_conn *conn,
				       struct l2cap_cmd_hdr *cmd, u16 cmd_len,
				       u8 *data)
{
	struct l2cap_cmd_rej_unk *rej = (struct l2cap_cmd_rej_unk *) data;
	struct l2cap_chan *chan;

	if (cmd_len < sizeof(*rej))
		return -EPROTO;

	mutex_lock(&conn->chan_lock);

	chan = __l2cap_get_chan_by_ident(conn, cmd->ident);
	if (!chan)
		goto done;

	l2cap_chan_lock(chan);
	l2cap_chan_del(chan, ECONNREFUSED);
	l2cap_chan_unlock(chan);

done:
	mutex_unlock(&conn->chan_lock);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 112 100.00% 1 100.00%
Total 112 100.00% 1 100.00%



static inline int l2cap_le_sig_cmd(struct l2cap_conn *conn,
				   struct l2cap_cmd_hdr *cmd, u16 cmd_len,
				   u8 *data)
{
	int err = 0;

	switch (cmd->code) {
	case L2CAP_COMMAND_REJ:
		l2cap_le_command_rej(conn, cmd, cmd_len, data);
		break;

	case L2CAP_CONN_PARAM_UPDATE_REQ:
		err = l2cap_conn_param_update_req(conn, cmd, cmd_len, data);
		break;

	case L2CAP_CONN_PARAM_UPDATE_RSP:
		break;

	case L2CAP_LE_CONN_RSP:
		l2cap_le_connect_rsp(conn, cmd, cmd_len, data);
		break;

	case L2CAP_LE_CONN_REQ:
		err = l2cap_le_connect_req(conn, cmd, cmd_len, data);
		break;

	case L2CAP_LE_CREDITS:
		err = l2cap_le_credits(conn, cmd, cmd_len, data);
		break;

	case L2CAP_DISCONN_REQ:
		err = l2cap_disconnect_req(conn, cmd, cmd_len, data);
		break;

	case L2CAP_DISCONN_RSP:
		l2cap_disconnect_rsp(conn, cmd, cmd_len, data);
		break;

	default:
		BT_ERR("Unknown LE signaling command 0x%2.2x", cmd->code);
		err = -EINVAL;
		break;
	}

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 146 84.39% 7 77.78%
Claudio Takahasi 27 15.61% 2 22.22%
Total 173 100.00% 9 100.00%



static inline void l2cap_le_sig_channel(struct l2cap_conn *conn,
					struct sk_buff *skb)
{
	struct hci_conn *hcon = conn->hcon;
	struct l2cap_cmd_hdr *cmd;
	u16 len;
	int err;

	if (hcon->type != LE_LINK)
		goto drop;

	if (skb->len < L2CAP_CMD_HDR_SIZE)
		goto drop;

	cmd = (void *) skb->data;
	skb_pull(skb, L2CAP_CMD_HDR_SIZE);

	len = le16_to_cpu(cmd->len);

	BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd->code, len, cmd->ident);

	if (len != skb->len || !cmd->ident) {
		BT_DBG("corrupted command");
		goto drop;
	}

	err = l2cap_le_sig_cmd(conn, cmd, len, skb->data);
	if (err) {
		struct l2cap_cmd_rej_unk rej;

		BT_ERR("Wrong link type (%d)", err);

		rej.reason = cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD);
		l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ,
			       sizeof(rej), &rej);
	}

drop:
	kfree_skb(skb);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 148 77.89% 3 42.86%
Claudio Takahasi 27 14.21% 1 14.29%
Marcel Holtmann 14 7.37% 2 28.57%
Joe Perches 1 0.53% 1 14.29%
Total 190 100.00% 7 100.00%



static inline void l2cap_sig_channel(struct l2cap_conn *conn,
				     struct sk_buff *skb)
{
	struct hci_conn *hcon = conn->hcon;
	u8 *data = skb->data;
	int len = skb->len;
	struct l2cap_cmd_hdr cmd;
	int err;

	l2cap_raw_recv(conn, skb);

	if (hcon->type != ACL_LINK)
		goto drop;

	while (len >= L2CAP_CMD_HDR_SIZE) {
		u16 cmd_len;
		memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE);
		data += L2CAP_CMD_HDR_SIZE;
		len  -= L2CAP_CMD_HDR_SIZE;

		cmd_len = le16_to_cpu(cmd.len);

		BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len,
		       cmd.ident);

		if (cmd_len > len || !cmd.ident) {
			BT_DBG("corrupted command");
			break;
		}

		err = l2cap_bredr_sig_cmd(conn, &cmd, cmd_len, data);
		if (err) {
			struct l2cap_cmd_rej_unk rej;

			BT_ERR("Wrong link type (%d)", err);

			rej.reason = cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD);
			l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ,
				       sizeof(rej), &rej);
		}

		data += cmd_len;
		len  -= cmd_len;
	}

drop:
	kfree_skb(skb);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 167 78.77% 4 57.14%
Claudio Takahasi 42 19.81% 1 14.29%
Marcel Holtmann 2 0.94% 1 14.29%
Joe Perches 1 0.47% 1 14.29%
Total 212 100.00% 7 100.00%



static int l2cap_check_fcs(struct l2cap_chan *chan,  struct sk_buff *skb)
{
	u16 our_fcs, rcv_fcs;
	int hdr_size;

	if (test_bit(FLAG_EXT_CTRL, &chan->flags))
		hdr_size = L2CAP_EXT_HDR_SIZE;
	else
		hdr_size = L2CAP_ENH_HDR_SIZE;

	if (chan->fcs == L2CAP_FCS_CRC16) {
		skb_trim(skb, skb->len - L2CAP_FCS_SIZE);
		rcv_fcs = get_unaligned_le16(skb->data + skb->len);
		our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size);

		if (our_fcs != rcv_fcs)
			return -EBADMSG;
	}
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 107 96.40% 3 75.00%
Claudio Takahasi 4 3.60% 1 25.00%
Total 111 100.00% 4 100.00%



static void l2cap_send_i_or_rr_or_rnr(struct l2cap_chan *chan)
{
	struct l2cap_ctrl control;

	BT_DBG("chan %p", chan);

	memset(&control, 0, sizeof(control));
	control.sframe = 1;
	control.final = 1;
	control.reqseq = chan->buffer_seq;
	set_bit(CONN_SEND_FBIT, &chan->conn_state);

	if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) {
		control.super = L2CAP_SUPER_RNR;
		l2cap_send_sframe(chan, &control);
	}

	if (test_and_clear_bit(CONN_REMOTE_BUSY, &chan->conn_state) &&
	    chan->unacked_frames > 0)
		__set_retrans_timer(chan);

	/* Send pending iframes */
	l2cap_ertm_send(chan);

	if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state) &&
	    test_bit(CONN_SEND_FBIT, &chan->conn_state)) {
		/* F-bit wasn't sent in an s-frame or i-frame yet, so
                 * send it now.
                 */
		control.super = L2CAP_SUPER_RR;
		l2cap_send_sframe(chan, &control);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 141 87.04% 2 28.57%
Maksim Krasnyanskiy 9 5.56% 2 28.57%
Claudio Takahasi 7 4.32% 1 14.29%
Gustavo Fernando Padovan 5 3.09% 2 28.57%
Total 162 100.00% 7 100.00%



static void append_skb_frag(struct sk_buff *skb, struct sk_buff *new_frag,
			    struct sk_buff **last_frag)
{
	/* skb->len reflects data in skb as well as all fragments
         * skb->data_len reflects only data in fragments
         */
	if (!skb_has_frag_list(skb))
		skb_shinfo(skb)->frag_list = new_frag;

	new_frag->next = NULL;

	(*last_frag)->next = new_frag;
	*last_frag = new_frag;

	skb->len += new_frag->len;
	skb->data_len += new_frag->len;
	skb->truesize += new_frag->truesize;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 77 91.67% 1 20.00%
Gustavo Fernando Padovan 6 7.14% 3 60.00%
Linus Torvalds 1 1.19% 1 20.00%
Total 84 100.00% 5 100.00%



static int l2cap_reassemble_sdu(struct l2cap_chan *chan, struct sk_buff *skb,
				struct l2cap_ctrl *control)
{
	int err = -EINVAL;

	switch (control->sar) {
	case L2CAP_SAR_UNSEGMENTED:
		if (chan->sdu)
			break;

		err = chan->ops->recv(chan, skb);
		break;

	case L2CAP_SAR_START:
		if (chan->sdu)
			break;

		if (!pskb_may_pull(skb, L2CAP_SDULEN_SIZE))
			break;

		chan->sdu_len = get_unaligned_le16(skb->data);
		skb_pull(skb, L2CAP_SDULEN_SIZE);

		if (chan->sdu_len > chan->imtu) {
			err = -EMSGSIZE;
			break;
		}

		if (skb->len >= chan->sdu_len)
			break;

		chan->sdu = skb;
		chan->sdu_last_frag = skb;

		skb = NULL;
		err = 0;
		break;

	case L2CAP_SAR_CONTINUE:
		if (!chan->sdu)
			break;

		append_skb_frag(chan->sdu, skb,
				&chan->sdu_last_frag);
		skb = NULL;

		if (chan->sdu->len >= chan->sdu_len)
			break;

		err = 0;
		break;

	case L2CAP_SAR_END:
		if (!chan->sdu)
			break;

		append_skb_frag(chan->sdu, skb,
				&chan->sdu_last_frag);
		skb = NULL;

		if (chan->sdu->len != chan->sdu_len)
			break;

		err = chan->ops->recv(chan, chan->sdu);

		if (!err) {
			/* Reassembly complete */
			chan->sdu = NULL;
			chan->sdu_last_frag = NULL;
			chan->sdu_len = 0;
		}
		break;
	}

	if (err) {
		kfree_skb(skb);
		kfree_skb(chan->sdu);
		chan->sdu = NULL;
		chan->sdu_last_frag = NULL;
		chan->sdu_len = 0;
	}

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 203 63.84% 1 5.56%
Gustavo Fernando Padovan 69 21.70% 10 55.56%
Mat Martineau 16 5.03% 1 5.56%
Daniel Borkmann 11 3.46% 1 5.56%
Andrei Emeltchenko 8 2.52% 3 16.67%
Linus Torvalds 7 2.20% 1 5.56%
Maksim Krasnyanskiy 4 1.26% 1 5.56%
Total 318 100.00% 18 100.00%



static int l2cap_resegment(struct l2cap_chan *chan)
{
	/* Placeholder */
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 11 73.33% 1 50.00%
Linus Torvalds 4 26.67% 1 50.00%
Total 15 100.00% 2 100.00%



void l2cap_chan_busy(struct l2cap_chan *chan, int busy)
{
	u8 event;

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

	event = busy ? L2CAP_EV_LOCAL_BUSY_DETECTED : L2CAP_EV_LOCAL_BUSY_CLEAR;
	l2cap_tx(chan, NULL, NULL, event);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 31 70.45% 1 16.67%
Mat Martineau 7 15.91% 1 16.67%
Gustavo Fernando Padovan 3 6.82% 1 16.67%
Maksim Krasnyanskiy 2 4.55% 2 33.33%
Linus Torvalds 1 2.27% 1 16.67%
Total 44 100.00% 6 100.00%



static int l2cap_rx_queued_iframes(struct l2cap_chan *chan)
{
	int err = 0;
	/* Pass sequential frames to l2cap_reassemble_sdu()
         * until a gap is encountered.
         */

	BT_DBG("chan %p", chan);

	while (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) {
		struct sk_buff *skb;
		BT_DBG("Searching for skb with txseq %d (queue len %d)",
		       chan->buffer_seq, skb_queue_len(&chan->srej_q));

		skb = l2cap_ertm_seq_in_queue(&chan->srej_q, chan->buffer_seq);

		if (!skb)
			break;

		skb_unlink(skb, &chan->srej_q);
		chan->buffer_seq = __next_seq(chan, chan->buffer_seq);
		err = l2cap_reassemble_sdu(chan, skb, &bt_cb(skb)->l2cap);
		if (err)
			break;
	}

	if (skb_queue_empty(&chan->srej_q)) {
		chan->rx_state = L2CAP_RX_STATE_RECV;
		l2cap_send_ack(chan);
	}

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 93 61.18% 2 22.22%
Mat Martineau 35 23.03% 2 22.22%
Gustavo Fernando Padovan 19 12.50% 3 33.33%
Andrei Emeltchenko 3 1.97% 1 11.11%
Szymon Janc 2 1.32% 1 11.11%
Total 152 100.00% 9 100.00%



static void l2cap_handle_srej(struct l2cap_chan *chan,
			      struct l2cap_ctrl *control)
{
	struct sk_buff *skb;

	BT_DBG("chan %p, control %p", chan, control);

	if (control->reqseq == chan->next_tx_seq) {
		BT_DBG("Invalid reqseq %d, disconnecting", control->reqseq);
		l2cap_send_disconn_req(chan, ECONNRESET);
		return;
	}

	skb = l2cap_ertm_seq_in_queue(&chan->tx_q, control->reqseq);

	if (skb == NULL) {
		BT_DBG("Seq %d not available for retransmission",
		       control->reqseq);
		return;
	}

	if (chan->max_tx != 0 && bt_cb(skb)->l2cap.retries >= chan->max_tx) {
		BT_DBG("Retry limit exceeded (%d)", chan->max_tx);
		l2cap_send_disconn_req(chan, ECONNRESET);
		return;
	}

	clear_bit(CONN_REMOTE_BUSY, &chan->conn_state);

	if (control->poll) {
		l2cap_pass_to_tx(chan, control);

		set_bit(CONN_SEND_FBIT, &chan->conn_state);
		l2cap_retransmit(chan, control);
		l2cap_ertm_send(chan);

		if (chan->tx_state == L2CAP_TX_STATE_WAIT_F) {
			set_bit(CONN_SREJ_ACT, &chan->conn_state);
			chan->srej_save_reqseq = control->reqseq;
		}
	} else {
		l2cap_pass_to_tx_fbit(chan, control);

		if (control->final) {
			if (chan->srej_save_reqseq != control->reqseq ||
			    !test_and_clear_bit(CONN_SREJ_ACT,
						&chan->conn_state))
				l2cap_retransmit(chan, control);
		} else {
			l2cap_retransmit(chan, control);
			if (chan->tx_state == L2CAP_TX_STATE_WAIT_F) {
				set_bit(CONN_SREJ_ACT, &chan->conn_state);
				chan->srej_save_reqseq = control->reqseq;
			}
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 203 70.00% 2 18.18%
Gustavo Fernando Padovan 63 21.72% 7 63.64%
Mat Martineau 24 8.28% 2 18.18%
Total 290 100.00% 11 100.00%



static void l2cap_handle_rej(struct l2cap_chan *chan,
			     struct l2cap_ctrl *control)
{
	struct sk_buff *skb;

	BT_DBG("chan %p, control %p", chan, control);

	if (control->reqseq == chan->next_tx_seq) {
		BT_DBG("Invalid reqseq %d, disconnecting", control->reqseq);
		l2cap_send_disconn_req(chan, ECONNRESET);
		return;
	}

	skb = l2cap_ertm_seq_in_queue(&chan->tx_q, control->reqseq);

	if (chan->max_tx && skb &&
	    bt_cb(skb)->l2cap.retries >= chan->max_tx) {
		BT_DBG("Retry limit exceeded (%d)", chan->max_tx);
		l2cap_send_disconn_req(chan, ECONNRESET);
		return;
	}

	clear_bit(CONN_REMOTE_BUSY, &chan->conn_state);

	l2cap_pass_to_tx(chan, control);

	if (control->final) {
		if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state))
			l2cap_retransmit_all(chan, control);
	} else {
		l2cap_retransmit_all(chan, control);
		l2cap_ertm_send(chan);
		if (chan->tx_state == L2CAP_TX_STATE_WAIT_F)
			set_bit(CONN_REJ_ACT, &chan->conn_state);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 106 55.50% 2 33.33%
Mat Martineau 84 43.98% 3 50.00%
Gustavo Fernando Padovan 1 0.52% 1 16.67%
Total 191 100.00% 6 100.00%



static u8 l2cap_classify_txseq(struct l2cap_chan *chan, u16 txseq)
{
	BT_DBG("chan %p, txseq %d", chan, txseq);

	BT_DBG("last_acked_seq %d, expected_tx_seq %d", chan->last_acked_seq,
	       chan->expected_tx_seq);

	if (chan->rx_state == L2CAP_RX_STATE_SREJ_SENT) {
		if (__seq_offset(chan, txseq, chan->last_acked_seq) >=
		    chan->tx_win) {
			/* See notes below regarding "double poll" and
                         * invalid packets.
                         */
			if (chan->tx_win <= ((chan->tx_win_max + 1) >> 1)) {
				BT_DBG("Invalid/Ignore - after SREJ");
				return L2CAP_TXSEQ_INVALID_IGNORE;
			} else {
				BT_DBG("Invalid - in window after SREJ sent");
				return L2CAP_TXSEQ_INVALID;
			}
		}

		if (chan->srej_list.head == txseq) {
			BT_DBG("Expected SREJ");
			return L2CAP_TXSEQ_EXPECTED_SREJ;
		}

		if (l2cap_ertm_seq_in_queue(&chan->srej_q, txseq)) {
			BT_DBG("Duplicate SREJ - txseq already stored");
			return L2CAP_TXSEQ_DUPLICATE_SREJ;
		}

		if (l2cap_seq_list_contains(&chan->srej_list, txseq)) {
			BT_DBG("Unexpected SREJ - not requested");
			return L2CAP_TXSEQ_UNEXPECTED_SREJ;
		}
	}

	if (chan->expected_tx_seq == txseq) {
		if (__seq_offset(chan, txseq, chan->last_acked_seq) >=
		    chan->tx_win) {
			BT_DBG("Invalid - txseq outside tx window");
			return L2CAP_TXSEQ_INVALID;
		} else {
			BT_DBG("Expected");
			return L2CAP_TXSEQ_EXPECTED;
		}
	}

	if (__seq_offset(chan, txseq, chan->last_acked_seq) <
	    __seq_offset(chan, chan->expected_tx_seq, chan->last_acked_seq)) {
		BT_DBG("Duplicate - expected_tx_seq later than txseq");
		return L2CAP_TXSEQ_DUPLICATE;
	}

	if (__seq_offset(chan, txseq, chan->last_acked_seq) >= chan->tx_win) {
		/* A source of invalid packets is a "double poll" condition,
                 * where delays cause us to send multiple poll packets.  If
                 * the remote stack receives and processes both polls,
                 * sequence numbers can wrap around in such a way that a
                 * resent frame has a sequence number that looks like new data
                 * with a sequence gap.  This would trigger an erroneous SREJ
                 * request.
                 *
                 * Fortunately, this is impossible with a tx window that's
                 * less than half of the maximum sequence number, which allows
                 * invalid frames to be safely ignored.
                 *
                 * With tx window sizes greater than half of the tx window
                 * maximum, the frame is invalid and cannot be ignored.  This
                 * causes a disconnect.
                 */

		if (chan->tx_win <= ((chan->tx_win_max + 1) >> 1)) {
			BT_DBG("Invalid/Ignore - txseq outside tx window");
			return L2CAP_TXSEQ_INVALID_IGNORE;
		} else {
			BT_DBG("Invalid - txseq outside tx window");
			return L2CAP_TXSEQ_INVALID;
		}
	} else {
		BT_DBG("Unexpected - txseq indicates missing frames");
		return L2CAP_TXSEQ_UNEXPECTED;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 201 62.23% 1 33.33%
Mat Martineau 122 37.77% 2 66.67%
Total 323 100.00% 3 100.00%



static int l2cap_rx_state_recv(struct l2cap_chan *chan,
			       struct l2cap_ctrl *control,
			       struct sk_buff *skb, u8 event)
{
	int err = 0;
	bool skb_in_use = false;

	BT_DBG("chan %p, control %p, skb %p, event %d", chan, control, skb,
	       event);

	switch (event) {
	case L2CAP_EV_RECV_IFRAME:
		switch (l2cap_classify_txseq(chan, control->txseq)) {
		case L2CAP_TXSEQ_EXPECTED:
			l2cap_pass_to_tx(chan, control);

			if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) {
				BT_DBG("Busy, discarding expected seq %d",
				       control->txseq);
				break;
			}

			chan->expected_tx_seq = __next_seq(chan,
							   control->txseq);

			chan->buffer_seq = chan->expected_tx_seq;
			skb_in_use = true;

			err = l2cap_reassemble_sdu(chan, skb, control);
			if (err)
				break;

			if (control->final) {
				if (!test_and_clear_bit(CONN_REJ_ACT,
							&chan->conn_state)) {
					control->final = 0;
					l2cap_retransmit_all(chan, control);
					l2cap_ertm_send(chan);
				}
			}

			if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state))
				l2cap_send_ack(chan);
			break;
		case L2CAP_TXSEQ_UNEXPECTED:
			l2cap_pass_to_tx(chan, control);

			/* Can't issue SREJ frames in the local busy state.
                         * Drop this frame, it will be seen as missing
                         * when local busy is exited.
                         */
			if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) {
				BT_DBG("Busy, discarding unexpected seq %d",
				       control->txseq);
				break;
			}

			/* There was a gap in the sequence, so an SREJ
                         * must be sent for each missing frame.  The
                         * current frame is stored for later use.
                         */
			skb_queue_tail(&chan->srej_q, skb);
			skb_in_use = true;
			BT_DBG("Queued %p (queue len %d)", skb,
			       skb_queue_len(&chan->srej_q));

			clear_bit(CONN_SREJ_ACT, &chan->conn_state);
			l2cap_seq_list_clear(&chan->srej_list);
			l2cap_send_srej(chan, control->txseq);

			chan->rx_state = L2CAP_RX_STATE_SREJ_SENT;
			break;
		case L2CAP_TXSEQ_DUPLICATE:
			l2cap_pass_to_tx(chan, control);
			break;
		case L2CAP_TXSEQ_INVALID_IGNORE:
			break;
		case L2CAP_TXSEQ_INVALID:
		default:
			l2cap_send_disconn_req(chan, ECONNRESET);
			break;
		}
		break;
	case L2CAP_EV_RECV_RR:
		l2cap_pass_to_tx(chan, control);
		if (control->final) {
			clear_bit(CONN_REMOTE_BUSY, &chan->conn_state);

			if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state) &&
			    !__chan_is_moving(chan)) {
				control->final = 0;
				l2cap_retransmit_all(chan, control);
			}

			l2cap_ertm_send(chan);
		} else if (control->poll) {
			l2cap_send_i_or_rr_or_rnr(chan);
		} else {
			if (test_and_clear_bit(CONN_REMOTE_BUSY,
					       &chan->conn_state) &&
			    chan->unacked_frames)
				__set_retrans_timer(chan);

			l2cap_ertm_send(chan);
		}
		break;
	case L2CAP_EV_RECV_RNR:
		set_bit(CONN_REMOTE_BUSY, &chan->conn_state);
		l2cap_pass_to_tx(chan, control);
		if (control && control->poll) {
			set_bit(CONN_SEND_FBIT, &chan->conn_state);
			l2cap_send_rr_or_rnr(chan, 0);
		}
		__clear_retrans_timer(chan);
		l2cap_seq_list_clear(&chan->retrans_list);
		break;
	case L2CAP_EV_RECV_REJ:
		l2cap_handle_rej(chan, control);
		break;
	case L2CAP_EV_RECV_SREJ:
		l2cap_handle_srej(chan, control);
		break;
	default:
		break;
	}

	if (skb && !skb_in_use) {
		BT_DBG("Freeing %p", skb);
		kfree_skb(skb);
	}

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 326 59.17% 1 20.00%
Mat Martineau 225 40.83% 4 80.00%
Total 551 100.00% 5 100.00%



static int l2cap_rx_state_srej_sent(struct l2cap_chan *chan,
				    struct l2cap_ctrl *control,
				    struct sk_buff *skb, u8 event)
{
	int err = 0;
	u16 txseq = control->txseq;
	bool skb_in_use = false;

	BT_DBG("chan %p, control %p, skb %p, event %d", chan, control, skb,
	       event);

	switch (event) {
	case L2CAP_EV_RECV_IFRAME:
		switch (l2cap_classify_txseq(chan, txseq)) {
		case L2CAP_TXSEQ_EXPECTED:
			/* Keep frame for reassembly later */
			l2cap_pass_to_tx(chan, control);
			skb_queue_tail(&chan->srej_q, skb);
			skb_in_use = true;
			BT_DBG("Queued %p (queue len %d)", skb,
			       skb_queue_len(&chan->srej_q));

			chan->expected_tx_seq = __next_seq(chan, txseq);
			break;
		case L2CAP_TXSEQ_EXPECTED_SREJ:
			l2cap_seq_list_pop(&chan->srej_list);

			l2cap_pass_to_tx(chan, control);
			skb_queue_tail(&chan->srej_q, skb);
			skb_in_use = true;
			BT_DBG("Queued %p (queue len %d)", skb,
			       skb_queue_len(&chan->srej_q));

			err = l2cap_rx_queued_iframes(chan);
			if (err)
				break;

			break;
		case L2CAP_TXSEQ_UNEXPECTED:
			/* Got a frame that can't be reassembled yet.
                         * Save it for later, and send SREJs to cover
                         * the missing frames.
                         */
			skb_queue_tail(&chan->srej_q, skb);
			skb_in_use = true;
			BT_DBG("Queued %p (queue len %d)", skb,
			       skb_queue_len(&chan->srej_q));

			l2cap_pass_to_tx(chan, control);
			l2cap_send_srej(chan, control->txseq);
			break;
		case L2CAP_TXSEQ_UNEXPECTED_SREJ:
			/* This frame was requested with an SREJ, but
                         * some expected retransmitted frames are
                         * missing.  Request retransmission of missing
                         * SREJ'd frames.
                         */
			skb_queue_tail(&chan->srej_q, skb);
			skb_in_use = true;
			BT_DBG("Queued %p (queue len %d)", skb,
			       skb_queue_len(&chan->srej_q));

			l2cap_pass_to_tx(chan, control);
			l2cap_send_srej_list(chan, control->txseq);
			break;
		case L2CAP_TXSEQ_DUPLICATE_SREJ:
			/* We've already queued this frame.  Drop this copy. */
			l2cap_pass_to_tx(chan, control);
			break;
		case L2CAP_TXSEQ_DUPLICATE:
			/* Expecting a later sequence number, so this frame
                         * was already received.  Ignore it completely.
                         */
			break;
		case L2CAP_TXSEQ_INVALID_IGNORE:
			break;
		case L2CAP_TXSEQ_INVALID:
		default:
			l2cap_send_disconn_req(chan, ECONNRESET);
			break;
		}
		break;
	case L2CAP_EV_RECV_RR:
		l2cap_pass_to_tx(chan, control);
		if (control->final) {
			clear_bit(CONN_REMOTE_BUSY, &chan->conn_state);

			if (!test_and_clear_bit(CONN_REJ_ACT,
						&chan->conn_state)) {
				control->final = 0;
				l2cap_retransmit_all(chan, control);
			}

			l2cap_ertm_send(chan);
		} else if (control->poll) {
			if (test_and_clear_bit(CONN_REMOTE_BUSY,
					       &chan->conn_state) &&
			    chan->unacked_frames) {
				__set_retrans_timer(chan);
			}

			set_bit(CONN_SEND_FBIT, &chan->conn_state);
			l2cap_send_srej_tail(chan);
		} else {
			if (test_and_clear_bit(CONN_REMOTE_BUSY,
					       &chan->conn_state) &&
			    chan->unacked_frames)
				__set_retrans_timer(chan);

			l2cap_send_ack(chan);
		}
		break;
	case L2CAP_EV_RECV_RNR:
		set_bit(CONN_REMOTE_BUSY, &chan->conn_state);
		l2cap_pass_to_tx(chan, control);
		if (control->poll) {
			l2cap_send_srej_tail(chan);
		} else {
			struct l2cap_ctrl rr_control;
			memset(&rr_control, 0, sizeof(rr_control));
			rr_control.sframe = 1;
			rr_control.super = L2CAP_SUPER_RR;
			rr_control.reqseq = chan->buffer_seq;
			l2cap_send_sframe(chan, &rr_control);
		}

		break;
	case L2CAP_EV_RECV_REJ:
		l2cap_handle_rej(chan, control);
		break;
	case L2CAP_EV_RECV_SREJ:
		l2cap_handle_srej(chan, control);
		break;
	}

	if (skb && !skb_in_use) {
		BT_DBG("Freeing %p", skb);
		kfree_skb(skb);
	}

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 377 64.33% 2 50.00%
Johan Hedberg 206 35.15% 1 25.00%
Peter Senna Tschudin 3 0.51% 1 25.00%
Total 586 100.00% 4 100.00%



static int l2cap_finish_move(struct l2cap_chan *chan)
{
	BT_DBG("chan %p", chan);

	chan->rx_state = L2CAP_RX_STATE_RECV;

	if (chan->hs_hcon)
		chan->conn->mtu = chan->hs_hcon->hdev->block_mtu;
	else
		chan->conn->mtu = chan->conn->hcon->hdev->acl_mtu;

	return l2cap_resegment(chan);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 62 92.54% 1 50.00%
Mat Martineau 5 7.46% 1 50.00%
Total 67 100.00% 2 100.00%



static int l2cap_rx_state_wait_p(struct l2cap_chan *chan,
				 struct l2cap_ctrl *control,
				 struct sk_buff *skb, u8 event)
{
	int err;

	BT_DBG("chan %p, control %p, skb %p, event %d", chan, control, skb,
	       event);

	if (!control->poll)
		return -EPROTO;

	l2cap_process_reqseq(chan, control->reqseq);

	if (!skb_queue_empty(&chan->tx_q))
		chan->tx_send_head = skb_peek(&chan->tx_q);
	else
		chan->tx_send_head = NULL;

	/* Rewind next_tx_seq to the point expected
         * by the receiver.
         */
	chan->next_tx_seq = control->reqseq;
	chan->unacked_frames = 0;

	err = l2cap_finish_move(chan);
	if (err)
		return err;

	set_bit(CONN_SEND_FBIT, &chan->conn_state);
	l2cap_send_i_or_rr_or_rnr(chan);

	if (event == L2CAP_EV_RECV_IFRAME)
		return -EPROTO;

	return l2cap_rx_state_recv(chan, control, NULL, event);
}

Contributors
Person Tokens Prop Commits CommitProp
Mat Martineau 98 62.82% 1 50.00%
Johan Hedberg 58 37.18% 1 50.00%
Total 156 100.00% 2 100.00%



static int l2cap_rx_state_wait_f(struct l2cap_chan *chan,
				 struct l2cap_ctrl *control,
				 struct sk_buff *skb, u8 event)
{
	int err;

	if (!control->final)
		return -EPROTO;

	clear_bit(CONN_REMOTE_BUSY, &chan->conn_state);

	chan->rx_state = L2CAP_RX_STATE_RECV;
	l2cap_process_reqseq(chan, control->reqseq);

	if (!skb_queue_empty(&chan->tx_q))
		chan->tx_send_head = skb_peek(&chan->tx_q);
	else
		chan->tx_send_head = NULL;

	/* Rewind next_tx_seq to the point expected
         * by the receiver.
         */
	chan->next_tx_seq = control->reqseq;
	chan->unacked_frames = 0;

	if (chan->hs_hcon)
		chan->conn->mtu = chan->hs_hcon->hdev->block_mtu;
	else
		chan->conn->mtu = chan->conn->hcon->hdev->acl_mtu;

	err = l2cap_resegment(chan);

	if (!err)
		err = l2cap_rx_state_recv(chan, control, skb, event);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 119 68.79% 1 50.00%
Mat Martineau 54 31.21% 1 50.00%
Total 173 100.00% 2 100.00%



static bool __valid_reqseq(struct l2cap_chan *chan, u16 reqseq)
{
	/* Make sure reqseq is for a packet that has been sent but not acked */
	u16 unacked;

	unacked = __seq_offset(chan, chan->next_tx_seq, chan->expected_ack_seq);
	return __seq_offset(chan, chan->next_tx_seq, reqseq) <= unacked;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 32 68.09% 1 50.00%
Mat Martineau 15 31.91% 1 50.00%
Total 47 100.00% 2 100.00%



static int l2cap_rx(struct l2cap_chan *chan, struct l2cap_ctrl *control,
		    struct sk_buff *skb, u8 event)
{
	int err = 0;

	BT_DBG("chan %p, control %p, skb %p, event %d, state %d", chan,
	       control, skb, event, chan->rx_state);

	if (__valid_reqseq(chan, control->reqseq)) {
		switch (chan->rx_state) {
		case L2CAP_RX_STATE_RECV:
			err = l2cap_rx_state_recv(chan, control, skb, event);
			break;
		case L2CAP_RX_STATE_SREJ_SENT:
			err = l2cap_rx_state_srej_sent(chan, control, skb,
						       event);
			break;
		case L2CAP_RX_STATE_WAIT_P:
			err = l2cap_rx_state_wait_p(chan, control, skb, event);
			break;
		case L2CAP_RX_STATE_WAIT_F:
			err = l2cap_rx_state_wait_f(chan, control, skb, event);
			break;
		default:
			/* shut it down */
			break;
		}
	} else {
		BT_DBG("Invalid reqseq %d (next_tx_seq %d, expected_ack_seq %d",
		       control->reqseq, chan->next_tx_seq,
		       chan->expected_ack_seq);
		l2cap_send_disconn_req(chan, ECONNRESET);
	}

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 112 66.67% 1 33.33%
Mat Martineau 56 33.33% 2 66.67%
Total 168 100.00% 3 100.00%



static int l2cap_stream_rx(struct l2cap_chan *chan, struct l2cap_ctrl *control,
			   struct sk_buff *skb)
{
	BT_DBG("chan %p, control %p, skb %p, state %d", chan, control, skb,
	       chan->rx_state);

	if (l2cap_classify_txseq(chan, control->txseq) ==
	    L2CAP_TXSEQ_EXPECTED) {
		l2cap_pass_to_tx(chan, control);

		BT_DBG("buffer_seq %d->%d", chan->buffer_seq,
		       __next_seq(chan, chan->buffer_seq));

		chan->buffer_seq = __next_seq(chan, chan->buffer_seq);

		l2cap_reassemble_sdu(chan, skb, control);
	} else {
		if (chan->sdu) {
			kfree_skb(chan->sdu);
			chan->sdu = NULL;
		}
		chan->sdu_last_frag = NULL;
		chan->sdu_len = 0;

		if (skb) {
			BT_DBG("Freeing %p", skb);
			kfree_skb(skb);
		}
	}

	chan->last_acked_seq = control->txseq;
	chan->expected_tx_seq = __next_seq(chan, control->txseq);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 106 60.23% 1 33.33%
Mat Martineau 69 39.20% 1 33.33%
Prasanna Karthik 1 0.57% 1 33.33%
Total 176 100.00% 3 100.00%



static int l2cap_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb)
{
	struct l2cap_ctrl *control = &bt_cb(skb)->l2cap;
	u16 len;
	u8 event;

	__unpack_control(chan, skb);

	len = skb->len;

	/*
         * We can just drop the corrupted I-frame here.
         * Receiver will miss it and start proper recovery
         * procedures and ask for retransmission.
         */
	if (l2cap_check_fcs(chan, skb))
		goto drop;

	if (!control->sframe && control->sar == L2CAP_SAR_START)
		len -= L2CAP_SDULEN_SIZE;

	if (chan->fcs == L2CAP_FCS_CRC16)
		len -= L2CAP_FCS_SIZE;

	if (len > chan->mps) {
		l2cap_send_disconn_req(chan, ECONNRESET);
		goto drop;
	}

	if ((chan->mode == L2CAP_MODE_ERTM ||
	     chan->mode == L2CAP_MODE_STREAMING) && sk_filter(chan->data, skb))
		goto drop;

	if (!control->sframe) {
		int err;

		BT_DBG("iframe sar %d, reqseq %d, final %d, txseq %d",
		       control->sar, control->reqseq, control->final,
		       control->txseq);

		/* Validate F-bit - F=0 always valid, F=1 only
                 * valid in TX WAIT_F
                 */
		if (control->final && chan->tx_state != L2CAP_TX_STATE_WAIT_F)
			goto drop;

		if (chan->mode != L2CAP_MODE_STREAMING) {
			event = L2CAP_EV_RECV_IFRAME;
			err = l2cap_rx(chan, control, skb, event);
		} else {
			err = l2cap_stream_rx(chan, control, skb);
		}

		if (err)
			l2cap_send_disconn_req(chan, ECONNRESET);
	} else {
		const u8 rx_func_to_event[4] = {
			L2CAP_EV_RECV_RR, L2CAP_EV_RECV_REJ,
			L2CAP_EV_RECV_RNR, L2CAP_EV_RECV_SREJ
		};

		/* Only I-frames are expected in streaming mode */
		if (chan->mode == L2CAP_MODE_STREAMING)
			goto drop;

		BT_DBG("sframe reqseq %d, final %d, poll %d, super %d",
		       control->reqseq, control->final, control->poll,
		       control->super);

		if (len != 0) {
			BT_ERR("Trailing bytes: %d in sframe", len);
			l2cap_send_disconn_req(chan, ECONNRESET);
			goto drop;
		}

		/* Validate F and P bits */
		if (control->final && (control->poll ||
				       chan->tx_state != L2CAP_TX_STATE_WAIT_F))
			goto drop;

		event = rx_func_to_event[control->super];
		if (l2cap_rx(chan, control, skb, event))
			l2cap_send_disconn_req(chan, ECONNRESET);
	}

	return 0;

drop:
	kfree_skb(skb);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 269 70.60% 2 50.00%
Mat Martineau 84 22.05% 1 25.00%
Daniel Borkmann 28 7.35% 1 25.00%
Total 381 100.00% 4 100.00%



static void l2cap_chan_le_send_credits(struct l2cap_chan *chan)
{
	struct l2cap_conn *conn = chan->conn;
	struct l2cap_le_credits pkt;
	u16 return_credits;

	/* We return more credits to the sender only after the amount of
         * credits falls below half of the initial amount.
         */
	if (chan->rx_credits >= (le_max_credits + 1) / 2)
		return;

	return_credits = le_max_credits - chan->rx_credits;

	BT_DBG("chan %p returning %u credits to sender", chan, return_credits);

	chan->rx_credits += return_credits;

	pkt.cid     = cpu_to_le16(chan->scid);
	pkt.credits = cpu_to_le16(return_credits);

	chan->ident = l2cap_get_ident(conn);

	l2cap_send_cmd(conn, chan->ident, L2CAP_LE_CREDITS, sizeof(pkt), &pkt);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 86 75.44% 1 50.00%
Mat Martineau 28 24.56% 1 50.00%
Total 114 100.00% 2 100.00%



static int l2cap_le_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb)
{
	int err;

	if (!chan->rx_credits) {
		BT_ERR("No credits to receive LE L2CAP data");
		l2cap_send_disconn_req(chan, ECONNRESET);
		return -ENOBUFS;
	}

	if (chan->imtu < skb->len) {
		BT_ERR("Too big LE L2CAP PDU");
		return -ENOBUFS;
	}

	chan->rx_credits--;
	BT_DBG("rx_credits %u -> %u", chan->rx_credits + 1, chan->rx_credits);

	l2cap_chan_le_send_credits(chan);

	err = 0;

	if (!chan->sdu) {
		u16 sdu_len;

		sdu_len = get_unaligned_le16(skb->data);
		skb_pull(skb, L2CAP_SDULEN_SIZE);

		BT_DBG("Start of new SDU. sdu_len %u skb->len %u imtu %u",
		       sdu_len, skb->len, chan->imtu);

		if (sdu_len > chan->imtu) {
			BT_ERR("Too big LE L2CAP SDU length received");
			err = -EMSGSIZE;
			goto failed;
		}

		if (skb->len > sdu_len) {
			BT_ERR("Too much LE L2CAP data received");
			err = -EINVAL;
			goto failed;
		}

		if (skb->len == sdu_len)
			return chan->ops->recv(chan, skb);

		chan->sdu = skb;
		chan->sdu_len = sdu_len;
		chan->sdu_last_frag = skb;

		return 0;
	}

	BT_DBG("SDU fragment. chan->sdu->len %u skb->len %u chan->sdu_len %u",
	       chan->sdu->len, skb->len, chan->sdu_len);

	if (chan->sdu->len + skb->len > chan->sdu_len) {
		BT_ERR("Too much LE L2CAP data received");
		err = -EINVAL;
		goto failed;
	}

	append_skb_frag(chan->sdu, skb, &chan->sdu_last_frag);
	skb = NULL;

	if (chan->sdu->len == chan->sdu_len) {
		err = chan->ops->recv(chan, chan->sdu);
		if (!err) {
			chan->sdu = NULL;
			chan->sdu_last_frag = NULL;
			chan->sdu_len = 0;
		}
	}

failed:
	if (err) {
		kfree_skb(skb);
		kfree_skb(chan->sdu);
		chan->sdu = NULL;
		chan->sdu_last_frag = NULL;
		chan->sdu_len = 0;
	}

	/* We can't return an error here since we took care of the skb
         * freeing internally. An error return would cause the caller to
         * do a double-free of the skb.
         */
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 233 60.05% 2 33.33%
Mat Martineau 155 39.95% 4 66.67%
Total 388 100.00% 6 100.00%



static void l2cap_data_channel(struct l2cap_conn *conn, u16 cid,
			       struct sk_buff *skb)
{
	struct l2cap_chan *chan;

	chan = l2cap_get_chan_by_scid(conn, cid);
	if (!chan) {
		if (cid == L2CAP_CID_A2MP) {
			chan = a2mp_channel_create(conn, skb);
			if (!chan) {
				kfree_skb(skb);
				return;
			}

			l2cap_chan_lock(chan);
		} else {
			BT_DBG("unknown cid 0x%4.4x", cid);
			/* Drop packet and return */
			kfree_skb(skb);
			return;
		}
	}

	BT_DBG("chan %p, len %d", chan, skb->len);

	/* If we receive data on a fixed channel before the info req/rsp
         * procdure is done simply assume that the channel is supported
         * and mark it as ready.
         */
	if (chan->chan_type == L2CAP_CHAN_FIXED)
		l2cap_chan_ready(chan);

	if (chan->state != BT_CONNECTED)
		goto drop;

	switch (chan->mode) {
	case L2CAP_MODE_LE_FLOWCTL:
		if (l2cap_le_data_rcv(chan, skb) < 0)
			goto drop;

		goto done;

	case L2CAP_MODE_BASIC:
		/* If socket recv buffers overflows we drop data here
                 * which is *bad* because L2CAP has to be reliable.
                 * But we don't have any other choice. L2CAP doesn't
                 * provide flow control mechanism. */

		if (chan->imtu < skb->len) {
			BT_ERR("Dropping L2CAP data: receive buffer overflow");
			goto drop;
		}

		if (!chan->ops->recv(chan, skb))
			goto done;
		break;

	case L2CAP_MODE_ERTM:
	case L2CAP_MODE_STREAMING:
		l2cap_data_rcv(chan, skb);
		goto done;

	default:
		BT_DBG("chan %p: bad mode 0x%2.2x", chan, chan->mode);
		break;
	}

drop:
	kfree_skb(skb);

done:
	l2cap_chan_unlock(chan);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 153 63.49% 2 11.76%
Mat Martineau 34 14.11% 2 11.76%
Gustavo Fernando Padovan 30 12.45% 8 47.06%
João Paulo Rechi Vita 10 4.15% 1 5.88%
Szymon Janc 7 2.90% 1 5.88%
Andrei Emeltchenko 7 2.90% 3 17.65%
Total 241 100.00% 17 100.00%



static void l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm,
				  struct sk_buff *skb)
{
	struct hci_conn *hcon = conn->hcon;
	struct l2cap_chan *chan;

	if (hcon->type != ACL_LINK)
		goto free_skb;

	chan = l2cap_global_chan_by_psm(0, psm, &hcon->src, &hcon->dst,
					ACL_LINK);
	if (!chan)
		goto free_skb;

	BT_DBG("chan %p, len %d", chan, skb->len);

	if (chan->state != BT_BOUND && chan->state != BT_CONNECTED)
		goto drop;

	if (chan->imtu < skb->len)
		goto drop;

	/* Store remote BD_ADDR and PSM for msg_name */
	bacpy(&bt_cb(skb)->l2cap.bdaddr, &hcon->dst);
	bt_cb(skb)->l2cap.psm = psm;

	if (!chan->ops->recv(chan, skb)) {
		l2cap_chan_put(chan);
		return;
	}

drop:
	l2cap_chan_put(chan);
free_skb:
	kfree_skb(skb);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 124 68.89% 3 27.27%
Mat Martineau 28 15.56% 1 9.09%
Gustavo Fernando Padovan 28 15.56% 7 63.64%
Total 180 100.00% 11 100.00%



static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb)
{
	struct l2cap_hdr *lh = (void *) skb->data;
	struct hci_conn *hcon = conn->hcon;
	u16 cid, len;
	__le16 psm;

	if (hcon->state != BT_CONNECTED) {
		BT_DBG("queueing pending rx skb");
		skb_queue_tail(&conn->pending_rx, skb);
		return;
	}

	skb_pull(skb, L2CAP_HDR_SIZE);
	cid = __le16_to_cpu(lh->cid);
	len = __le16_to_cpu(lh->len);

	if (len != skb->len) {
		kfree_skb(skb);
		return;
	}

	/* Since we can't actively block incoming LE connections we must
         * at least ensure that we ignore incoming data from them.
         */
	if (hcon->type == LE_LINK &&
	    hci_bdaddr_list_lookup(&hcon->hdev->blacklist, &hcon->dst,
				   bdaddr_dst_type(hcon))) {
		kfree_skb(skb);
		return;
	}

	BT_DBG("len %d, cid 0x%4.4x", len, cid);

	switch (cid) {
	case L2CAP_CID_SIGNALING:
		l2cap_sig_channel(conn, skb);
		break;

	case L2CAP_CID_CONN_LESS:
		psm = get_unaligned((__le16 *) skb->data);
		skb_pull(skb, L2CAP_PSMLEN_SIZE);
		l2cap_conless_channel(conn, psm, skb);
		break;

	case L2CAP_CID_LE_SIGNALING:
		l2cap_le_sig_channel(conn, skb);
		break;

	default:
		l2cap_data_channel(conn, cid, skb);
		break;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 231 100.00% 8 100.00%
Total 231 100.00% 8 100.00%



static void process_pending_rx(struct work_struct *work)
{
	struct l2cap_conn *conn = container_of(work, struct l2cap_conn,
					       pending_rx_work);
	struct sk_buff *skb;

	BT_DBG("");

	while ((skb = skb_dequeue(&conn->pending_rx)))
		l2cap_recv_frame(conn, skb);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 57 100.00% 1 100.00%
Total 57 100.00% 1 100.00%



static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon)
{
	struct l2cap_conn *conn = hcon->l2cap_data;
	struct hci_chan *hchan;

	if (conn)
		return conn;

	hchan = hci_chan_create(hcon);
	if (!hchan)
		return NULL;

	conn = kzalloc(sizeof(*conn), GFP_KERNEL);
	if (!conn) {
		hci_chan_del(hchan);
		return NULL;
	}

	kref_init(&conn->ref);
	hcon->l2cap_data = conn;
	conn->hcon = hci_conn_get(hcon);
	conn->hchan = hchan;

	BT_DBG("hcon %p conn %p hchan %p", hcon, conn, hchan);

	switch (hcon->type) {
	case LE_LINK:
		if (hcon->hdev->le_mtu) {
			conn->mtu = hcon->hdev->le_mtu;
			break;
		}
		/* fall through */
	default:
		conn->mtu = hcon->hdev->acl_mtu;
		break;
	}

	conn->feat_mask = 0;

	conn->local_fixed_chan = L2CAP_FC_SIG_BREDR | L2CAP_FC_CONNLESS;

	if (hcon->type == ACL_LINK &&
	    hci_dev_test_flag(hcon->hdev, HCI_HS_ENABLED))
		conn->local_fixed_chan |= L2CAP_FC_A2MP;

	if (hci_dev_test_flag(hcon->hdev, HCI_LE_ENABLED) &&
	    (bredr_sc_enabled(hcon->hdev) ||
	     hci_dev_test_flag(hcon->hdev, HCI_FORCE_BREDR_SMP)))
		conn->local_fixed_chan |= L2CAP_FC_SMP_BREDR;

	mutex_init(&conn->ident_lock);
	mutex_init(&conn->chan_lock);

	INIT_LIST_HEAD(&conn->chan_l);
	INIT_LIST_HEAD(&conn->users);

	INIT_DELAYED_WORK(&conn->info_timer, l2cap_info_timeout);

	skb_queue_head_init(&conn->pending_rx);
	INIT_WORK(&conn->pending_rx_work, process_pending_rx);
	INIT_WORK(&conn->id_addr_update_work, l2cap_conn_update_id_addr);

	conn->disc_reason = HCI_ERROR_REMOTE_USER_TERM;

	return conn;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 262 83.71% 7 36.84%
Gustavo Fernando Padovan 20 6.39% 4 21.05%
Marcel Holtmann 20 6.39% 4 21.05%
Andrei Emeltchenko 10 3.19% 3 15.79%
Mat Martineau 1 0.32% 1 5.26%
Total 313 100.00% 19 100.00%



static bool is_valid_psm(u16 psm, u8 dst_type) {
	if (!psm)
		return false;

	if (bdaddr_type_is_le(dst_type))
		return (psm <= 0x00ff);

	/* PSM must be odd and lsb of upper byte must be 0 */
	return ((psm & 0x0101) == 0x0001);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 43 93.48% 1 50.00%
Linus Torvalds 3 6.52% 1 50.00%
Total 46 100.00% 2 100.00%



int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
		       bdaddr_t *dst, u8 dst_type)
{
	struct l2cap_conn *conn;
	struct hci_conn *hcon;
	struct hci_dev *hdev;
	int err;

	BT_DBG("%pMR -> %pMR (type %u) psm 0x%2.2x", &chan->src, dst,
	       dst_type, __le16_to_cpu(psm));

	hdev = hci_get_route(dst, &chan->src, chan->src_type);
	if (!hdev)
		return -EHOSTUNREACH;

	hci_dev_lock(hdev);

	if (!is_valid_psm(__le16_to_cpu(psm), dst_type) && !cid &&
	    chan->chan_type != L2CAP_CHAN_RAW) {
		err = -EINVAL;
		goto done;
	}

	if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && !psm) {
		err = -EINVAL;
		goto done;
	}

	if (chan->chan_type == L2CAP_CHAN_FIXED && !cid) {
		err = -EINVAL;
		goto done;
	}

	switch (chan->mode) {
	case L2CAP_MODE_BASIC:
		break;
	case L2CAP_MODE_LE_FLOWCTL:
		l2cap_le_flowctl_init(chan);
		break;
	case L2CAP_MODE_ERTM:
	case L2CAP_MODE_STREAMING:
		if (!disable_ertm)
			break;
		/* fall through */
	default:
		err = -EOPNOTSUPP;
		goto done;
	}

	switch (chan->state) {
	case BT_CONNECT:
	case BT_CONNECT2:
	case BT_CONFIG:
		/* Already connecting */
		err = 0;
		goto done;

	case BT_CONNECTED:
		/* Already connected */
		err = -EISCONN;
		goto done;

	case BT_OPEN:
	case BT_BOUND:
		/* Can connect */
		break;

	default:
		err = -EBADFD;
		goto done;
	}

	/* Set destination address and psm */
	bacpy(&chan->dst, dst);
	chan->dst_type = dst_type;

	chan->psm = psm;
	chan->dcid = cid;

	if (bdaddr_type_is_le(dst_type)) {
		/* Convert from L2CAP channel address type to HCI address type
                 */
		if (dst_type == BDADDR_LE_PUBLIC)
			dst_type = ADDR_LE_DEV_PUBLIC;
		else
			dst_type = ADDR_LE_DEV_RANDOM;

		if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
			hcon = hci_connect_le(hdev, dst, dst_type,
					      chan->sec_level,
					      HCI_LE_CONN_TIMEOUT,
					      HCI_ROLE_SLAVE);
		else
			hcon = hci_connect_le_scan(hdev, dst, dst_type,
						   chan->sec_level,
						   HCI_LE_CONN_TIMEOUT);

	} else {
		u8 auth_type = l2cap_get_auth_type(chan);
		hcon = hci_connect_acl(hdev, dst, chan->sec_level, auth_type);
	}

	if (IS_ERR(hcon)) {
		err = PTR_ERR(hcon);
		goto done;
	}

	conn = l2cap_conn_add(hcon);
	if (!conn) {
		hci_conn_drop(hcon);
		err = -ENOMEM;
		goto done;
	}

	mutex_lock(&conn->chan_lock);
	l2cap_chan_lock(chan);

	if (cid && __l2cap_get_chan_by_dcid(conn, cid)) {
		hci_conn_drop(hcon);
		err = -EBUSY;
		goto chan_unlock;
	}

	/* Update source addr of the socket */
	bacpy(&chan->src, &hcon->src);
	chan->src_type = bdaddr_src_type(hcon);

	__l2cap_chan_add(conn, chan);

	/* l2cap_chan_add takes its own ref so we can drop this one */
	hci_conn_drop(hcon);

	l2cap_state_change(chan, BT_CONNECT);
	__set_chan_timer(chan, chan->ops->get_sndtimeo(chan));

	/* Release chan->sport so that it can be reused by other
         * sockets (as it's only used for listening sockets).
         */
	write_lock(&chan_list_lock);
	chan->sport = 0;
	write_unlock(&chan_list_lock);

	if (hcon->state == BT_CONNECTED) {
		if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
			__clear_chan_timer(chan);
			if (l2cap_chan_check_security(chan, true))
				l2cap_state_change(chan, BT_CONNECTED);
		} else
			l2cap_do_start(chan);
	}

	err = 0;

chan_unlock:
	l2cap_chan_unlock(chan);
	mutex_unlock(&conn->chan_lock);
done:
	hci_dev_unlock(hdev);
	hci_dev_put(hdev);
	return err;
}
Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 462 73.45% 14 37.84%
Maxim Krasnyansky 44 7.00% 1 2.70%
Marcel Holtmann 34 5.41% 8 21.62%
Gustavo Fernando Padovan 28 4.45% 5 13.51%
Andre Guedes 21 3.34% 2 5.41%
Linus Torvalds 17 2.70% 1 2.70%
Anderson Briglia 9 1.43% 1 2.70%
Maksim Krasnyanskiy 7 1.11% 1 2.70%
Jukka Rissanen 3 0.48% 1 2.70%
Ido Yariv 2 0.32% 1 2.70%
Al Viro 1 0.16% 1 2.70%
Jakub Pawlowski 1 0.16% 1 2.70%
Total 629 100.00% 37 100.00%


EXPORT_SYMBOL_GPL(l2cap_chan_connect);

/* ---- L2CAP interface with lower layer (HCI) ---- */



int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr)
{
	int exact = 0, lm1 = 0, lm2 = 0;
	struct l2cap_chan *c;

	BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr);

	/* Find listening sockets and check their link_mode */
	read_lock(&chan_list_lock);
	list_for_each_entry(c, &chan_list, global_l) {
		if (c->state != BT_LISTEN)
			continue;

		if (!bacmp(&c->src, &hdev->bdaddr)) {
			lm1 |= HCI_LM_ACCEPT;
			if (test_bit(FLAG_ROLE_SWITCH, &c->flags))
				lm1 |= HCI_LM_MASTER;
			exact++;
		} else if (!bacmp(&c->src, BDADDR_ANY)) {
			lm2 |= HCI_LM_ACCEPT;
			if (test_bit(FLAG_ROLE_SWITCH, &c->flags))
				lm2 |= HCI_LM_MASTER;
		}
	}
	read_unlock(&chan_list_lock);

	return exact ? lm1 : lm2;
}

Contributors
Person Tokens Prop Commits CommitProp
Maksim Krasnyanskiy 84 52.83% 1 10.00%
Linus Torvalds 21 13.21% 1 10.00%
Marcel Holtmann 21 13.21% 3 30.00%
Andrei Emeltchenko 15 9.43% 2 20.00%
Gustavo Fernando Padovan 12 7.55% 2 20.00%
Arnaldo Carvalho de Melo 6 3.77% 1 10.00%
Total 159 100.00% 10 100.00%

/* Find the next fixed channel in BT_LISTEN state, continue iteration
 * from an existing channel in the list or from the beginning of the
 * global list (by passing NULL as first parameter).
 */


static struct l2cap_chan *l2cap_global_fixed_chan(struct l2cap_chan *c,
						  struct hci_conn *hcon)
{
	u8 src_type = bdaddr_src_type(hcon);

	read_lock(&chan_list_lock);

	if (c)
		c = list_next_entry(c, global_l);
	else
		c = list_entry(chan_list.next, typeof(*c), global_l);

	list_for_each_entry_from(c, &chan_list, global_l) {
		if (c->chan_type != L2CAP_CHAN_FIXED)
			continue;
		if (c->state != BT_LISTEN)
			continue;
		if (bacmp(&c->src, &hcon->src) && bacmp(&c->src, BDADDR_ANY))
			continue;
		if (src_type != c->src_type)
			continue;

		l2cap_chan_hold(c);
		read_unlock(&chan_list_lock);
		return c;
	}

	read_unlock(&chan_list_lock);

	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 149 100.00% 3 100.00%
Total 149 100.00% 3 100.00%



static void l2cap_connect_cfm(struct hci_conn *hcon, u8 status)
{
	struct hci_dev *hdev = hcon->hdev;
	struct l2cap_conn *conn;
	struct l2cap_chan *pchan;
	u8 dst_type;

	if (hcon->type != ACL_LINK && hcon->type != LE_LINK)
		return;

	BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status);

	if (status) {
		l2cap_conn_del(hcon, bt_to_errno(status));
		return;
	}

	conn = l2cap_conn_add(hcon);
	if (!conn)
		return;

	dst_type = bdaddr_dst_type(hcon);

	/* If device is blocked, do not create channels for it */
	if (hci_bdaddr_list_lookup(&hdev->blacklist, &hcon->dst, dst_type))
		return;

	/* Find fixed channels and notify them of the new connection. We
         * use multiple individual lookups, continuing each time where
         * we left off, because the list lock would prevent calling the
         * potentially sleeping l2cap_chan_lock() function.
         */
	pchan = l2cap_global_fixed_chan(NULL, hcon);
	while (pchan) {
		struct l2cap_chan *chan, *next;

		/* Client fixed channels should override server ones */
		if (__l2cap_get_chan_by_dcid(conn, pchan->scid))
			goto next;

		l2cap_chan_lock(pchan);
		chan = pchan->ops->new_connection(pchan);
		if (chan) {
			bacpy(&chan->src, &hcon->src);
			bacpy(&chan->dst, &hcon->dst);
			chan->src_type = bdaddr_src_type(hcon);
			chan->dst_type = dst_type;

			__l2cap_chan_add(conn, chan);
		}

		l2cap_chan_unlock(pchan);
next:
		next = l2cap_global_fixed_chan(pchan, hcon);
		l2cap_chan_put(pchan);
		pchan = next;
	}

	l2cap_conn_ready(conn);
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 207 79.62% 5 45.45%
Maksim Krasnyanskiy 31 11.92% 2 18.18%
Linus Torvalds 15 5.77% 1 9.09%
Marcel Holtmann 5 1.92% 1 9.09%
Andrei Emeltchenko 2 0.77% 2 18.18%
Total 260 100.00% 11 100.00%



int l2cap_disconn_ind(struct hci_conn *hcon)
{
	struct l2cap_conn *conn = hcon->l2cap_data;

	BT_DBG("hcon %p", hcon);

	if (!conn)
		return HCI_ERROR_REMOTE_USER_TERM;
	return conn->disc_reason;
}

Contributors
Person Tokens Prop Commits CommitProp
Marcel Holtmann 31 79.49% 1 33.33%
Maksim Krasnyanskiy 7 17.95% 1 33.33%
Andrei Emeltchenko 1 2.56% 1 33.33%
Total 39 100.00% 3 100.00%



static void l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason)
{
	if (hcon->type != ACL_LINK && hcon->type != LE_LINK)
		return;

	BT_DBG("hcon %p reason %d", hcon, reason);

	l2cap_conn_del(hcon, bt_to_errno(reason));
}

Contributors
Person Tokens Prop Commits CommitProp
Maksim Krasnyanskiy 19 39.58% 2 28.57%
Johan Hedberg 16 33.33% 1 14.29%
Marcel Holtmann 6 12.50% 1 14.29%
Linus Torvalds 5 10.42% 1 14.29%
Joe Perches 1 2.08% 1 14.29%
Andrei Emeltchenko 1 2.08% 1 14.29%
Total 48 100.00% 7 100.00%



static inline void l2cap_check_encryption(struct l2cap_chan *chan, u8 encrypt)
{
	if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED)
		return;

	if (encrypt == 0x00) {
		if (chan->sec_level == BT_SECURITY_MEDIUM) {
			__set_chan_timer(chan, L2CAP_ENC_TIMEOUT);
		} else if (chan->sec_level == BT_SECURITY_HIGH ||
			   chan->sec_level == BT_SECURITY_FIPS)
			l2cap_chan_close(chan, ECONNREFUSED);
	} else {
		if (chan->sec_level == BT_SECURITY_MEDIUM)
			__clear_chan_timer(chan);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Marcel Holtmann 70 80.46% 3 27.27%
Gustavo Fernando Padovan 16 18.39% 7 63.64%
Andrzej Kaczmarek 1 1.15% 1 9.09%
Total 87 100.00% 11 100.00%



static void l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt)
{
	struct l2cap_conn *conn = hcon->l2cap_data;
	struct l2cap_chan *chan;

	if (!conn)
		return;

	BT_DBG("conn %p status 0x%2.2x encrypt %u", conn, status, encrypt);

	mutex_lock(&conn->chan_lock);

	list_for_each_entry(chan, &conn->chan_l, list) {
		l2cap_chan_lock(chan);

		BT_DBG("chan %p scid 0x%4.4x state %s", chan, chan->scid,
		       state_to_string(chan->state));

		if (chan->scid == L2CAP_CID_A2MP) {
			l2cap_chan_unlock(chan);
			continue;
		}

		if (!status && encrypt)
			chan->sec_level = hcon->sec_level;

		if (!__l2cap_no_conn_pending(chan)) {
			l2cap_chan_unlock(chan);
			continue;
		}

		if (!status && (chan->state == BT_CONNECTED ||
				chan->state == BT_CONFIG)) {
			chan->ops->resume(chan);
			l2cap_check_encryption(chan, encrypt);
			l2cap_chan_unlock(chan);
			continue;
		}

		if (chan->state == BT_CONNECT) {
			if (!status)
				l2cap_start_connection(chan);
			else
				__set_chan_timer(chan, L2CAP_DISC_TIMEOUT);
		} else if (chan->state == BT_CONNECT2 &&
			   chan->mode != L2CAP_MODE_LE_FLOWCTL) {
			struct l2cap_conn_rsp rsp;
			__u16 res, stat;

			if (!status) {
				if (test_bit(FLAG_DEFER_SETUP, &chan->flags)) {
					res = L2CAP_CR_PEND;
					stat = L2CAP_CS_AUTHOR_PEND;
					chan->ops->defer(chan);
				} else {
					l2cap_state_change(chan, BT_CONFIG);
					res = L2CAP_CR_SUCCESS;
					stat = L2CAP_CS_NO_INFO;
				}
			} else {
				l2cap_state_change(chan, BT_DISCONN);
				__set_chan_timer(chan, L2CAP_DISC_TIMEOUT);
				res = L2CAP_CR_SEC_BLOCK;
				stat = L2CAP_CS_NO_INFO;
			}

			rsp.scid   = cpu_to_le16(chan->dcid);
			rsp.dcid   = cpu_to_le16(chan->scid);
			rsp.result = cpu_to_le16(res);
			rsp.status = cpu_to_le16(stat);
			l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP,
				       sizeof(rsp), &rsp);

			if (!test_bit(CONF_REQ_SENT, &chan->conf_state) &&
			    res == L2CAP_CR_SUCCESS) {
				char buf[128];
				set_bit(CONF_REQ_SENT, &chan->conf_state);
				l2cap_send_cmd(conn, l2cap_get_ident(conn),
					       L2CAP_CONF_REQ,
					       l2cap_build_conf_req(chan, buf, sizeof(buf)),
					       buf);
				chan->num_conf_req++;
			}
		}

		l2cap_chan_unlock(chan);
	}

	mutex_unlock(&conn->chan_lock);
}

Contributors
Person Tokens Prop Commits CommitProp
Marcel Holtmann 77 17.04% 9 21.95%
Linus Torvalds 61 13.50% 1 2.44%
Mat Martineau 61 13.50% 1 2.44%
Maksim Krasnyanskiy 60 13.27% 2 4.88%
Gustavo Fernando Padovan 57 12.61% 14 34.15%
Andrei Emeltchenko 53 11.73% 6 14.63%
Johan Hedberg 47 10.40% 4 9.76%
Vinicius Costa Gomes 25 5.53% 1 2.44%
Ben Seri 5 1.11% 1 2.44%
Hideaki Yoshifuji / 吉藤英明 4 0.88% 1 2.44%
Andrzej Kaczmarek 2 0.44% 1 2.44%
Total 452 100.00% 41 100.00%



void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags)
{
	struct l2cap_conn *conn = hcon->l2cap_data;
	struct l2cap_hdr *hdr;
	int len;

	/* For AMP controller do not create l2cap conn */
	if (!conn && hcon->hdev->dev_type != HCI_PRIMARY)
		goto drop;

	if (!conn)
		conn = l2cap_conn_add(hcon);

	if (!conn)
		goto drop;

	BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags);

	switch (flags) {
	case ACL_START:
	case ACL_START_NO_FLUSH:
	case ACL_COMPLETE:
		if (conn->rx_len) {
			BT_ERR("Unexpected start frame (len %d)", skb->len);
			kfree_skb(conn->rx_skb);
			conn->rx_skb = NULL;
			conn->rx_len = 0;
			l2cap_conn_unreliable(conn, ECOMM);
		}

		/* Start fragment always begin with Basic L2CAP header */
		if (skb->len < L2CAP_HDR_SIZE) {
			BT_ERR("Frame is too short (len %d)", skb->len);
			l2cap_conn_unreliable(conn, ECOMM);
			goto drop;
		}

		hdr = (struct l2cap_hdr *) skb->data;
		len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE;

		if (len == skb->len) {
			/* Complete frame received */
			l2cap_recv_frame(conn, skb);
			return;
		}

		BT_DBG("Start: total len %d, frag len %d", len, skb->len);

		if (skb->len > len) {
			BT_ERR("Frame is too long (len %d, expected len %d)",
			       skb->len, len);
			l2cap_conn_unreliable(conn, ECOMM);
			goto drop;
		}

		/* Allocate skb for the complete frame (with header) */
		conn->rx_skb = bt_skb_alloc(len, GFP_KERNEL);
		if (!conn->rx_skb)
			goto drop;

		skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
					  skb->len);
		conn->rx_len = len - skb->len;
		break;

	case ACL_CONT:
		BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len);

		if (!conn->rx_len) {
			BT_ERR("Unexpected continuation frame (len %d)", skb->len);
			l2cap_conn_unreliable(conn, ECOMM);
			goto drop;
		}

		if (skb->len > conn->rx_len) {
			BT_ERR("Fragment is too long (len %d, expected %d)",
			       skb->len, conn->rx_len);
			kfree_skb(conn->rx_skb);
			conn->rx_skb = NULL;
			conn->rx_len = 0;
			l2cap_conn_unreliable(conn, ECOMM);
			goto drop;
		}

		skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
					  skb->len);
		conn->rx_len -= skb->len;

		if (!conn->rx_len) {
			/* Complete frame received. l2cap_recv_frame
                         * takes ownership of the skb so set the global
                         * rx_skb pointer to NULL first.
                         */
			struct sk_buff *rx_skb = conn->rx_skb;
			conn->rx_skb = NULL;
			l2cap_recv_frame(conn, rx_skb);
		}
		break;
	}

drop:
	kfree_skb(skb);
}

Contributors
Person Tokens Prop Commits CommitProp
Maksim Krasnyanskiy 243 51.16% 4 19.05%
Linus Torvalds 90 18.95% 2 9.52%
Marcel Holtmann 49 10.32% 5 23.81%
Andrei Emeltchenko 47 9.89% 4 19.05%
Maxim Krasnyansky 16 3.37% 1 4.76%
Johan Hedberg 14 2.95% 1 4.76%
Gustavo Fernando Padovan 8 1.68% 2 9.52%
Arnaldo Carvalho de Melo 6 1.26% 1 4.76%
Arron Wang 2 0.42% 1 4.76%
Total 475 100.00% 21 100.00%


static struct hci_cb l2cap_cb = {
	.name		= "L2CAP",
	.connect_cfm	= l2cap_connect_cfm,
	.disconn_cfm	= l2cap_disconn_cfm,
	.security_cfm	= l2cap_security_cfm,
};



static int l2cap_debugfs_show(struct seq_file *f, void *p)
{
	struct l2cap_chan *c;

	read_lock(&chan_list_lock);

	list_for_each_entry(c, &chan_list, global_l) {
		seq_printf(f, "%pMR (%u) %pMR (%u) %d %d 0x%4.4x 0x%4.4x %d %d %d %d\n",
			   &c->src, c->src_type, &c->dst, c->dst_type,
			   c->state, __le16_to_cpu(c->psm),
			   c->scid, c->dcid, c->imtu, c->omtu,
			   c->sec_level, c->mode);
	}

	read_unlock(&chan_list_lock);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Maksim Krasnyanskiy 39 37.14% 2 12.50%
Marcel Holtmann 25 23.81% 7 43.75%
Gustavo Fernando Padovan 22 20.95% 4 25.00%
Linus Torvalds 13 12.38% 2 12.50%
Arnaldo Carvalho de Melo 6 5.71% 1 6.25%
Total 105 100.00% 16 100.00%



static int l2cap_debugfs_open(struct inode *inode, struct file *file)
{
	return single_open(file, l2cap_debugfs_show, inode->i_private);
}

Contributors
Person Tokens Prop Commits CommitProp
Marcel Holtmann 25 89.29% 2 66.67%
Maksim Krasnyanskiy 3 10.71% 1 33.33%
Total 28 100.00% 3 100.00%


static const struct file_operations l2cap_debugfs_fops = {
	.open		= l2cap_debugfs_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};


static struct dentry *l2cap_debugfs;



int __init l2cap_init(void)
{
	int err;

	err = l2cap_init_sockets();
	if (err < 0)
		return err;

	hci_register_cb(&l2cap_cb);

	if (IS_ERR_OR_NULL(bt_debugfs))
		return 0;

	l2cap_debugfs = debugfs_create_file("l2cap", 0444, bt_debugfs,
					    NULL, &l2cap_debugfs_fops);

	debugfs_create_u16("l2cap_le_max_credits", 0644, bt_debugfs,
			   &le_max_credits);
	debugfs_create_u16("l2cap_le_default_mps", 0644, bt_debugfs,
			   &le_default_mps);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 28 33.33% 2 18.18%
Marcel Holtmann 26 30.95% 4 36.36%
Linus Torvalds 13 15.48% 1 9.09%
Arnaldo Carvalho de Melo 10 11.90% 1 9.09%
Maksim Krasnyanskiy 3 3.57% 1 9.09%
Gustavo Fernando Padovan 2 2.38% 1 9.09%
Samuel Ortiz 2 2.38% 1 9.09%
Total 84 100.00% 11 100.00%



void l2cap_exit(void)
{
	debugfs_remove(l2cap_debugfs);
	hci_unregister_cb(&l2cap_cb);
	l2cap_cleanup_sockets();
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds 7 33.33% 1 14.29%
Johan Hedberg 6 28.57% 1 14.29%
Marcel Holtmann 5 23.81% 3 42.86%
Gustavo Fernando Padovan 2 9.52% 1 14.29%
Arnaldo Carvalho de Melo 1 4.76% 1 14.29%
Total 21 100.00% 7 100.00%

module_param(disable_ertm, bool, 0644);
MODULE_PARM_DESC(disable_ertm, "Disable enhanced retransmission mode");
Overall Contributors
Person Tokens Prop Commits CommitProp
Johan Hedberg 11205 32.81% 94 16.94%
Mat Martineau 8017 23.48% 59 10.63%
Gustavo Fernando Padovan 6896 20.19% 140 25.23%
Andrei Emeltchenko 2547 7.46% 88 15.86%
Marcel Holtmann 1911 5.60% 75 13.51%
Linus Torvalds 760 2.23% 2 0.36%
Maksim Krasnyanskiy 644 1.89% 8 1.44%
Claudio Takahasi 377 1.10% 3 0.54%
David Herrmann 323 0.95% 3 0.54%
Luiz Augusto von Dentz 211 0.62% 3 0.54%
Vinicius Costa Gomes 204 0.60% 5 0.90%
Ben Seri 191 0.56% 2 0.36%
Jaganath Kanakkassery 129 0.38% 4 0.72%
Maxim Krasnyansky 107 0.31% 1 0.18%
Ville Tervo 85 0.25% 4 0.72%
Jukka Rissanen 83 0.24% 3 0.54%
Joe Perches 45 0.13% 2 0.36%
Andrzej Kaczmarek 44 0.13% 2 0.36%
Daniel Borkmann 42 0.12% 1 0.18%
Andre Guedes 39 0.11% 4 0.72%
Syam Sidhardhan 35 0.10% 2 0.36%
Arnaldo Carvalho de Melo 31 0.09% 4 0.72%
Szymon Janc 27 0.08% 7 1.26%
Ido Yariv 26 0.08% 1 0.18%
Steven Walter 18 0.05% 1 0.18%
Steven Miao 16 0.05% 1 0.18%
Anderson Briglia 14 0.04% 1 0.18%
Anderson Lizardo 13 0.04% 1 0.18%
Jukka Taimisto 12 0.04% 1 0.18%
João Paulo Rechi Vita 12 0.04% 2 0.36%
Al Viro 11 0.03% 3 0.54%
Alexey Dobriyan 9 0.03% 1 0.18%
Jaikumar Ganesh 9 0.03% 1 0.18%
Lukasz Rymanowski 6 0.02% 1 0.18%
Ulisses Furquim 6 0.02% 3 0.54%
Hideaki Yoshifuji / 吉藤英明 5 0.01% 2 0.36%
Johannes Berg 5 0.01% 2 0.36%
Martin Townsend 5 0.01% 1 0.18%
Ilia Kolomisnky 3 0.01% 1 0.18%
Thomas Graf 3 0.01% 1 0.18%
Peter Senna Tschudin 3 0.01% 1 0.18%
Tedd Ho-Jeong An 2 0.01% 1 0.18%
Thomas Gleixner 2 0.01% 1 0.18%
Peter Zijlstra 2 0.01% 1 0.18%
John W. Linville 2 0.01% 1 0.18%
David S. Miller 2 0.01% 1 0.18%
Samuel Ortiz 2 0.01% 1 0.18%
Arron Wang 2 0.01% 1 0.18%
Robert P. J. Day 2 0.01% 1 0.18%
Stephen Hemminger 1 0.00% 1 0.18%
Nathan Holstein 1 0.00% 1 0.18%
Rusty Russell 1 0.00% 1 0.18%
Prasanna Karthik 1 0.00% 1 0.18%
Pavel Emelyanov 1 0.00% 1 0.18%
Jakub Pawlowski 1 0.00% 1 0.18%
Total 34151 100.00% 555 100.00%
Directory: net/bluetooth

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Marcel Holtmann	30	81.08%	1	50.00%
Johan Hedberg	7	18.92%	1	50.00%
Total	37	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.15 net/bluetooth/l2cap_core.c

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