![Steffen Hurrle](/assets/img/avatar_default.png)
This is a follow-up patch to f3d3342602
("net: rework recvmsg
handler msg_name and msg_namelen logic").
DECLARE_SOCKADDR validates that the structure we use for writing the
name information to is not larger than the buffer which is reserved
for msg->msg_name (which is 128 bytes). Also use DECLARE_SOCKADDR
consistently in sendmsg code paths.
Signed-off-by: Steffen Hurrle <steffen@hurrle.net>
Suggested-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
1620 lines
34 KiB
C
1620 lines
34 KiB
C
/*
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BlueZ - Bluetooth protocol stack for Linux
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Copyright (C) 2000-2001 Qualcomm Incorporated
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Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org>
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Copyright (C) 2010 Google Inc.
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Copyright (C) 2011 ProFUSION Embedded Systems
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Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation;
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
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CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
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COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
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SOFTWARE IS DISCLAIMED.
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*/
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/* Bluetooth L2CAP sockets. */
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#include <linux/module.h>
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#include <linux/export.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include <net/bluetooth/l2cap.h>
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#include "smp.h"
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bool enable_lecoc;
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static struct bt_sock_list l2cap_sk_list = {
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.lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock)
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};
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static const struct proto_ops l2cap_sock_ops;
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static void l2cap_sock_init(struct sock *sk, struct sock *parent);
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static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock,
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int proto, gfp_t prio);
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bool l2cap_is_socket(struct socket *sock)
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{
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return sock && sock->ops == &l2cap_sock_ops;
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}
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EXPORT_SYMBOL(l2cap_is_socket);
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static int l2cap_validate_bredr_psm(u16 psm)
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{
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/* PSM must be odd and lsb of upper byte must be 0 */
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if ((psm & 0x0101) != 0x0001)
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return -EINVAL;
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/* Restrict usage of well-known PSMs */
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if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE))
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return -EACCES;
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return 0;
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}
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static int l2cap_validate_le_psm(u16 psm)
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{
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/* Valid LE_PSM ranges are defined only until 0x00ff */
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if (psm > 0x00ff)
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return -EINVAL;
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/* Restrict fixed, SIG assigned PSM values to CAP_NET_BIND_SERVICE */
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if (psm <= 0x007f && !capable(CAP_NET_BIND_SERVICE))
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return -EACCES;
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return 0;
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}
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static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
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{
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struct sock *sk = sock->sk;
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struct l2cap_chan *chan = l2cap_pi(sk)->chan;
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struct sockaddr_l2 la;
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int len, err = 0;
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BT_DBG("sk %p", sk);
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if (!addr || addr->sa_family != AF_BLUETOOTH)
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return -EINVAL;
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memset(&la, 0, sizeof(la));
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len = min_t(unsigned int, sizeof(la), alen);
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memcpy(&la, addr, len);
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if (la.l2_cid && la.l2_psm)
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return -EINVAL;
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if (!bdaddr_type_is_valid(la.l2_bdaddr_type))
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return -EINVAL;
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if (bdaddr_type_is_le(la.l2_bdaddr_type)) {
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if (!enable_lecoc && la.l2_psm)
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return -EINVAL;
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/* We only allow ATT user space socket */
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if (la.l2_cid &&
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la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT))
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return -EINVAL;
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}
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lock_sock(sk);
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if (sk->sk_state != BT_OPEN) {
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err = -EBADFD;
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goto done;
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}
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if (la.l2_psm) {
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__u16 psm = __le16_to_cpu(la.l2_psm);
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if (la.l2_bdaddr_type == BDADDR_BREDR)
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err = l2cap_validate_bredr_psm(psm);
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else
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err = l2cap_validate_le_psm(psm);
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if (err)
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goto done;
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}
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if (la.l2_cid)
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err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid));
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else
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err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm);
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if (err < 0)
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goto done;
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switch (chan->chan_type) {
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case L2CAP_CHAN_CONN_LESS:
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if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_3DSP)
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chan->sec_level = BT_SECURITY_SDP;
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break;
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case L2CAP_CHAN_CONN_ORIENTED:
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if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_SDP ||
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__le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM)
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chan->sec_level = BT_SECURITY_SDP;
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break;
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case L2CAP_CHAN_RAW:
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chan->sec_level = BT_SECURITY_SDP;
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break;
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}
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bacpy(&chan->src, &la.l2_bdaddr);
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chan->src_type = la.l2_bdaddr_type;
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if (chan->psm && bdaddr_type_is_le(chan->src_type))
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chan->mode = L2CAP_MODE_LE_FLOWCTL;
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chan->state = BT_BOUND;
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sk->sk_state = BT_BOUND;
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done:
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release_sock(sk);
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return err;
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}
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static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr,
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int alen, int flags)
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{
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struct sock *sk = sock->sk;
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struct l2cap_chan *chan = l2cap_pi(sk)->chan;
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struct sockaddr_l2 la;
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int len, err = 0;
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BT_DBG("sk %p", sk);
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if (!addr || alen < sizeof(addr->sa_family) ||
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addr->sa_family != AF_BLUETOOTH)
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return -EINVAL;
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memset(&la, 0, sizeof(la));
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len = min_t(unsigned int, sizeof(la), alen);
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memcpy(&la, addr, len);
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if (la.l2_cid && la.l2_psm)
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return -EINVAL;
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if (!bdaddr_type_is_valid(la.l2_bdaddr_type))
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return -EINVAL;
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/* Check that the socket wasn't bound to something that
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* conflicts with the address given to connect(). If chan->src
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* is BDADDR_ANY it means bind() was never used, in which case
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* chan->src_type and la.l2_bdaddr_type do not need to match.
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*/
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if (chan->src_type == BDADDR_BREDR && bacmp(&chan->src, BDADDR_ANY) &&
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bdaddr_type_is_le(la.l2_bdaddr_type)) {
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/* Old user space versions will try to incorrectly bind
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* the ATT socket using BDADDR_BREDR. We need to accept
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* this and fix up the source address type only when
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* both the source CID and destination CID indicate
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* ATT. Anything else is an invalid combination.
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*/
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if (chan->scid != L2CAP_CID_ATT ||
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la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT))
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return -EINVAL;
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/* We don't have the hdev available here to make a
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* better decision on random vs public, but since all
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* user space versions that exhibit this issue anyway do
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* not support random local addresses assuming public
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* here is good enough.
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*/
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chan->src_type = BDADDR_LE_PUBLIC;
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}
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if (chan->src_type != BDADDR_BREDR && la.l2_bdaddr_type == BDADDR_BREDR)
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return -EINVAL;
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if (bdaddr_type_is_le(la.l2_bdaddr_type)) {
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if (!enable_lecoc && la.l2_psm)
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return -EINVAL;
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/* We only allow ATT user space socket */
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if (la.l2_cid &&
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la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT))
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return -EINVAL;
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}
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if (chan->psm && bdaddr_type_is_le(chan->src_type))
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chan->mode = L2CAP_MODE_LE_FLOWCTL;
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err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid),
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&la.l2_bdaddr, la.l2_bdaddr_type);
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if (err)
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return err;
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lock_sock(sk);
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err = bt_sock_wait_state(sk, BT_CONNECTED,
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sock_sndtimeo(sk, flags & O_NONBLOCK));
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release_sock(sk);
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return err;
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}
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static int l2cap_sock_listen(struct socket *sock, int backlog)
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{
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struct sock *sk = sock->sk;
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struct l2cap_chan *chan = l2cap_pi(sk)->chan;
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int err = 0;
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BT_DBG("sk %p backlog %d", sk, backlog);
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lock_sock(sk);
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if (sk->sk_state != BT_BOUND) {
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err = -EBADFD;
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goto done;
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}
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if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) {
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err = -EINVAL;
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goto done;
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}
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switch (chan->mode) {
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case L2CAP_MODE_BASIC:
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case L2CAP_MODE_LE_FLOWCTL:
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break;
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case L2CAP_MODE_ERTM:
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case L2CAP_MODE_STREAMING:
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if (!disable_ertm)
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break;
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/* fall through */
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default:
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err = -ENOTSUPP;
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goto done;
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}
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sk->sk_max_ack_backlog = backlog;
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sk->sk_ack_backlog = 0;
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chan->state = BT_LISTEN;
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sk->sk_state = BT_LISTEN;
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done:
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release_sock(sk);
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return err;
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}
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static int l2cap_sock_accept(struct socket *sock, struct socket *newsock,
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int flags)
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{
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DECLARE_WAITQUEUE(wait, current);
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struct sock *sk = sock->sk, *nsk;
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long timeo;
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int err = 0;
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lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
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timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
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BT_DBG("sk %p timeo %ld", sk, timeo);
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/* Wait for an incoming connection. (wake-one). */
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add_wait_queue_exclusive(sk_sleep(sk), &wait);
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while (1) {
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set_current_state(TASK_INTERRUPTIBLE);
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if (sk->sk_state != BT_LISTEN) {
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err = -EBADFD;
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break;
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}
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nsk = bt_accept_dequeue(sk, newsock);
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if (nsk)
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break;
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if (!timeo) {
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err = -EAGAIN;
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break;
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}
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if (signal_pending(current)) {
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err = sock_intr_errno(timeo);
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break;
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}
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release_sock(sk);
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timeo = schedule_timeout(timeo);
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lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
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}
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__set_current_state(TASK_RUNNING);
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remove_wait_queue(sk_sleep(sk), &wait);
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if (err)
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goto done;
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newsock->state = SS_CONNECTED;
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BT_DBG("new socket %p", nsk);
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done:
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release_sock(sk);
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return err;
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}
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static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr,
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int *len, int peer)
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{
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struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr;
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struct sock *sk = sock->sk;
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struct l2cap_chan *chan = l2cap_pi(sk)->chan;
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BT_DBG("sock %p, sk %p", sock, sk);
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memset(la, 0, sizeof(struct sockaddr_l2));
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addr->sa_family = AF_BLUETOOTH;
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*len = sizeof(struct sockaddr_l2);
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if (peer) {
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la->l2_psm = chan->psm;
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bacpy(&la->l2_bdaddr, &chan->dst);
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la->l2_cid = cpu_to_le16(chan->dcid);
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la->l2_bdaddr_type = chan->dst_type;
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} else {
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la->l2_psm = chan->sport;
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bacpy(&la->l2_bdaddr, &chan->src);
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la->l2_cid = cpu_to_le16(chan->scid);
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la->l2_bdaddr_type = chan->src_type;
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}
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return 0;
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}
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static int l2cap_sock_getsockopt_old(struct socket *sock, int optname,
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char __user *optval, int __user *optlen)
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{
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struct sock *sk = sock->sk;
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struct l2cap_chan *chan = l2cap_pi(sk)->chan;
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struct l2cap_options opts;
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struct l2cap_conninfo cinfo;
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int len, err = 0;
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u32 opt;
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BT_DBG("sk %p", sk);
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if (get_user(len, optlen))
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return -EFAULT;
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lock_sock(sk);
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switch (optname) {
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case L2CAP_OPTIONS:
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/* LE sockets should use BT_SNDMTU/BT_RCVMTU, but since
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* legacy ATT code depends on getsockopt for
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* L2CAP_OPTIONS we need to let this pass.
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*/
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if (bdaddr_type_is_le(chan->src_type) &&
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chan->scid != L2CAP_CID_ATT) {
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err = -EINVAL;
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break;
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}
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memset(&opts, 0, sizeof(opts));
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opts.imtu = chan->imtu;
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opts.omtu = chan->omtu;
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opts.flush_to = chan->flush_to;
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opts.mode = chan->mode;
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opts.fcs = chan->fcs;
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opts.max_tx = chan->max_tx;
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opts.txwin_size = chan->tx_win;
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|
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len = min_t(unsigned int, len, sizeof(opts));
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if (copy_to_user(optval, (char *) &opts, len))
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err = -EFAULT;
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break;
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|
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case L2CAP_LM:
|
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switch (chan->sec_level) {
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case BT_SECURITY_LOW:
|
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opt = L2CAP_LM_AUTH;
|
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break;
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case BT_SECURITY_MEDIUM:
|
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opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT;
|
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break;
|
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case BT_SECURITY_HIGH:
|
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opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT |
|
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L2CAP_LM_SECURE;
|
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break;
|
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default:
|
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opt = 0;
|
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break;
|
|
}
|
|
|
|
if (test_bit(FLAG_ROLE_SWITCH, &chan->flags))
|
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opt |= L2CAP_LM_MASTER;
|
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|
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if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags))
|
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opt |= L2CAP_LM_RELIABLE;
|
|
|
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if (put_user(opt, (u32 __user *) optval))
|
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err = -EFAULT;
|
|
break;
|
|
|
|
case L2CAP_CONNINFO:
|
|
if (sk->sk_state != BT_CONNECTED &&
|
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!(sk->sk_state == BT_CONNECT2 &&
|
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test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
|
|
err = -ENOTCONN;
|
|
break;
|
|
}
|
|
|
|
memset(&cinfo, 0, sizeof(cinfo));
|
|
cinfo.hci_handle = chan->conn->hcon->handle;
|
|
memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3);
|
|
|
|
len = min_t(unsigned int, len, sizeof(cinfo));
|
|
if (copy_to_user(optval, (char *) &cinfo, len))
|
|
err = -EFAULT;
|
|
|
|
break;
|
|
|
|
default:
|
|
err = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct l2cap_chan *chan = l2cap_pi(sk)->chan;
|
|
struct bt_security sec;
|
|
struct bt_power pwr;
|
|
int len, err = 0;
|
|
|
|
BT_DBG("sk %p", sk);
|
|
|
|
if (level == SOL_L2CAP)
|
|
return l2cap_sock_getsockopt_old(sock, optname, optval, optlen);
|
|
|
|
if (level != SOL_BLUETOOTH)
|
|
return -ENOPROTOOPT;
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (optname) {
|
|
case BT_SECURITY:
|
|
if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED &&
|
|
chan->chan_type != L2CAP_CHAN_RAW) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
memset(&sec, 0, sizeof(sec));
|
|
if (chan->conn) {
|
|
sec.level = chan->conn->hcon->sec_level;
|
|
|
|
if (sk->sk_state == BT_CONNECTED)
|
|
sec.key_size = chan->conn->hcon->enc_key_size;
|
|
} else {
|
|
sec.level = chan->sec_level;
|
|
}
|
|
|
|
len = min_t(unsigned int, len, sizeof(sec));
|
|
if (copy_to_user(optval, (char *) &sec, len))
|
|
err = -EFAULT;
|
|
|
|
break;
|
|
|
|
case BT_DEFER_SETUP:
|
|
if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
|
|
(u32 __user *) optval))
|
|
err = -EFAULT;
|
|
|
|
break;
|
|
|
|
case BT_FLUSHABLE:
|
|
if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags),
|
|
(u32 __user *) optval))
|
|
err = -EFAULT;
|
|
|
|
break;
|
|
|
|
case BT_POWER:
|
|
if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM
|
|
&& sk->sk_type != SOCK_RAW) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags);
|
|
|
|
len = min_t(unsigned int, len, sizeof(pwr));
|
|
if (copy_to_user(optval, (char *) &pwr, len))
|
|
err = -EFAULT;
|
|
|
|
break;
|
|
|
|
case BT_CHANNEL_POLICY:
|
|
if (put_user(chan->chan_policy, (u32 __user *) optval))
|
|
err = -EFAULT;
|
|
break;
|
|
|
|
case BT_SNDMTU:
|
|
if (!enable_lecoc) {
|
|
err = -EPROTONOSUPPORT;
|
|
break;
|
|
}
|
|
|
|
if (!bdaddr_type_is_le(chan->src_type)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (sk->sk_state != BT_CONNECTED) {
|
|
err = -ENOTCONN;
|
|
break;
|
|
}
|
|
|
|
if (put_user(chan->omtu, (u16 __user *) optval))
|
|
err = -EFAULT;
|
|
break;
|
|
|
|
case BT_RCVMTU:
|
|
if (!enable_lecoc) {
|
|
err = -EPROTONOSUPPORT;
|
|
break;
|
|
}
|
|
|
|
if (!bdaddr_type_is_le(chan->src_type)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (put_user(chan->imtu, (u16 __user *) optval))
|
|
err = -EFAULT;
|
|
break;
|
|
|
|
default:
|
|
err = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu)
|
|
{
|
|
switch (chan->scid) {
|
|
case L2CAP_CID_ATT:
|
|
if (mtu < L2CAP_LE_MIN_MTU)
|
|
return false;
|
|
break;
|
|
|
|
default:
|
|
if (mtu < L2CAP_DEFAULT_MIN_MTU)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static int l2cap_sock_setsockopt_old(struct socket *sock, int optname,
|
|
char __user *optval, unsigned int optlen)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct l2cap_chan *chan = l2cap_pi(sk)->chan;
|
|
struct l2cap_options opts;
|
|
int len, err = 0;
|
|
u32 opt;
|
|
|
|
BT_DBG("sk %p", sk);
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (optname) {
|
|
case L2CAP_OPTIONS:
|
|
if (bdaddr_type_is_le(chan->src_type)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (sk->sk_state == BT_CONNECTED) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
opts.imtu = chan->imtu;
|
|
opts.omtu = chan->omtu;
|
|
opts.flush_to = chan->flush_to;
|
|
opts.mode = chan->mode;
|
|
opts.fcs = chan->fcs;
|
|
opts.max_tx = chan->max_tx;
|
|
opts.txwin_size = chan->tx_win;
|
|
|
|
len = min_t(unsigned int, sizeof(opts), optlen);
|
|
if (copy_from_user((char *) &opts, optval, len)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (!l2cap_valid_mtu(chan, opts.imtu)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
chan->mode = opts.mode;
|
|
switch (chan->mode) {
|
|
case L2CAP_MODE_LE_FLOWCTL:
|
|
break;
|
|
case L2CAP_MODE_BASIC:
|
|
clear_bit(CONF_STATE2_DEVICE, &chan->conf_state);
|
|
break;
|
|
case L2CAP_MODE_ERTM:
|
|
case L2CAP_MODE_STREAMING:
|
|
if (!disable_ertm)
|
|
break;
|
|
/* fall through */
|
|
default:
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
chan->imtu = opts.imtu;
|
|
chan->omtu = opts.omtu;
|
|
chan->fcs = opts.fcs;
|
|
chan->max_tx = opts.max_tx;
|
|
chan->tx_win = opts.txwin_size;
|
|
chan->flush_to = opts.flush_to;
|
|
break;
|
|
|
|
case L2CAP_LM:
|
|
if (get_user(opt, (u32 __user *) optval)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
if (opt & L2CAP_LM_AUTH)
|
|
chan->sec_level = BT_SECURITY_LOW;
|
|
if (opt & L2CAP_LM_ENCRYPT)
|
|
chan->sec_level = BT_SECURITY_MEDIUM;
|
|
if (opt & L2CAP_LM_SECURE)
|
|
chan->sec_level = BT_SECURITY_HIGH;
|
|
|
|
if (opt & L2CAP_LM_MASTER)
|
|
set_bit(FLAG_ROLE_SWITCH, &chan->flags);
|
|
else
|
|
clear_bit(FLAG_ROLE_SWITCH, &chan->flags);
|
|
|
|
if (opt & L2CAP_LM_RELIABLE)
|
|
set_bit(FLAG_FORCE_RELIABLE, &chan->flags);
|
|
else
|
|
clear_bit(FLAG_FORCE_RELIABLE, &chan->flags);
|
|
break;
|
|
|
|
default:
|
|
err = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname,
|
|
char __user *optval, unsigned int optlen)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct l2cap_chan *chan = l2cap_pi(sk)->chan;
|
|
struct bt_security sec;
|
|
struct bt_power pwr;
|
|
struct l2cap_conn *conn;
|
|
int len, err = 0;
|
|
u32 opt;
|
|
|
|
BT_DBG("sk %p", sk);
|
|
|
|
if (level == SOL_L2CAP)
|
|
return l2cap_sock_setsockopt_old(sock, optname, optval, optlen);
|
|
|
|
if (level != SOL_BLUETOOTH)
|
|
return -ENOPROTOOPT;
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (optname) {
|
|
case BT_SECURITY:
|
|
if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED &&
|
|
chan->chan_type != L2CAP_CHAN_RAW) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
sec.level = BT_SECURITY_LOW;
|
|
|
|
len = min_t(unsigned int, sizeof(sec), optlen);
|
|
if (copy_from_user((char *) &sec, optval, len)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
if (sec.level < BT_SECURITY_LOW ||
|
|
sec.level > BT_SECURITY_HIGH) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
chan->sec_level = sec.level;
|
|
|
|
if (!chan->conn)
|
|
break;
|
|
|
|
conn = chan->conn;
|
|
|
|
/*change security for LE channels */
|
|
if (chan->scid == L2CAP_CID_ATT) {
|
|
if (!conn->hcon->out) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (smp_conn_security(conn->hcon, sec.level))
|
|
break;
|
|
sk->sk_state = BT_CONFIG;
|
|
chan->state = BT_CONFIG;
|
|
|
|
/* or for ACL link */
|
|
} else if ((sk->sk_state == BT_CONNECT2 &&
|
|
test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) ||
|
|
sk->sk_state == BT_CONNECTED) {
|
|
if (!l2cap_chan_check_security(chan))
|
|
set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags);
|
|
else
|
|
sk->sk_state_change(sk);
|
|
} else {
|
|
err = -EINVAL;
|
|
}
|
|
break;
|
|
|
|
case BT_DEFER_SETUP:
|
|
if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (get_user(opt, (u32 __user *) optval)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
if (opt) {
|
|
set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
|
|
set_bit(FLAG_DEFER_SETUP, &chan->flags);
|
|
} else {
|
|
clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
|
|
clear_bit(FLAG_DEFER_SETUP, &chan->flags);
|
|
}
|
|
break;
|
|
|
|
case BT_FLUSHABLE:
|
|
if (get_user(opt, (u32 __user *) optval)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
if (opt > BT_FLUSHABLE_ON) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (opt == BT_FLUSHABLE_OFF) {
|
|
conn = chan->conn;
|
|
/* proceed further only when we have l2cap_conn and
|
|
No Flush support in the LM */
|
|
if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (opt)
|
|
set_bit(FLAG_FLUSHABLE, &chan->flags);
|
|
else
|
|
clear_bit(FLAG_FLUSHABLE, &chan->flags);
|
|
break;
|
|
|
|
case BT_POWER:
|
|
if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED &&
|
|
chan->chan_type != L2CAP_CHAN_RAW) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
pwr.force_active = BT_POWER_FORCE_ACTIVE_ON;
|
|
|
|
len = min_t(unsigned int, sizeof(pwr), optlen);
|
|
if (copy_from_user((char *) &pwr, optval, len)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
if (pwr.force_active)
|
|
set_bit(FLAG_FORCE_ACTIVE, &chan->flags);
|
|
else
|
|
clear_bit(FLAG_FORCE_ACTIVE, &chan->flags);
|
|
break;
|
|
|
|
case BT_CHANNEL_POLICY:
|
|
if (get_user(opt, (u32 __user *) optval)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (chan->mode != L2CAP_MODE_ERTM &&
|
|
chan->mode != L2CAP_MODE_STREAMING) {
|
|
err = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
chan->chan_policy = (u8) opt;
|
|
|
|
if (sk->sk_state == BT_CONNECTED &&
|
|
chan->move_role == L2CAP_MOVE_ROLE_NONE)
|
|
l2cap_move_start(chan);
|
|
|
|
break;
|
|
|
|
case BT_SNDMTU:
|
|
if (!enable_lecoc) {
|
|
err = -EPROTONOSUPPORT;
|
|
break;
|
|
}
|
|
|
|
if (!bdaddr_type_is_le(chan->src_type)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
/* Setting is not supported as it's the remote side that
|
|
* decides this.
|
|
*/
|
|
err = -EPERM;
|
|
break;
|
|
|
|
case BT_RCVMTU:
|
|
if (!enable_lecoc) {
|
|
err = -EPROTONOSUPPORT;
|
|
break;
|
|
}
|
|
|
|
if (!bdaddr_type_is_le(chan->src_type)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (sk->sk_state == BT_CONNECTED) {
|
|
err = -EISCONN;
|
|
break;
|
|
}
|
|
|
|
if (get_user(opt, (u32 __user *) optval)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
chan->imtu = opt;
|
|
break;
|
|
|
|
default:
|
|
err = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
|
|
struct msghdr *msg, size_t len)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct l2cap_chan *chan = l2cap_pi(sk)->chan;
|
|
int err;
|
|
|
|
BT_DBG("sock %p, sk %p", sock, sk);
|
|
|
|
err = sock_error(sk);
|
|
if (err)
|
|
return err;
|
|
|
|
if (msg->msg_flags & MSG_OOB)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (sk->sk_state != BT_CONNECTED)
|
|
return -ENOTCONN;
|
|
|
|
lock_sock(sk);
|
|
err = bt_sock_wait_ready(sk, msg->msg_flags);
|
|
release_sock(sk);
|
|
if (err)
|
|
return err;
|
|
|
|
l2cap_chan_lock(chan);
|
|
err = l2cap_chan_send(chan, msg, len, sk->sk_priority);
|
|
l2cap_chan_unlock(chan);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
|
|
struct msghdr *msg, size_t len, int flags)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
int err;
|
|
|
|
lock_sock(sk);
|
|
|
|
if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP,
|
|
&bt_sk(sk)->flags)) {
|
|
if (bdaddr_type_is_le(pi->chan->src_type)) {
|
|
sk->sk_state = BT_CONNECTED;
|
|
pi->chan->state = BT_CONNECTED;
|
|
__l2cap_le_connect_rsp_defer(pi->chan);
|
|
} else {
|
|
sk->sk_state = BT_CONFIG;
|
|
pi->chan->state = BT_CONFIG;
|
|
__l2cap_connect_rsp_defer(pi->chan);
|
|
}
|
|
|
|
err = 0;
|
|
goto done;
|
|
}
|
|
|
|
release_sock(sk);
|
|
|
|
if (sock->type == SOCK_STREAM)
|
|
err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags);
|
|
else
|
|
err = bt_sock_recvmsg(iocb, sock, msg, len, flags);
|
|
|
|
if (pi->chan->mode != L2CAP_MODE_ERTM)
|
|
return err;
|
|
|
|
/* Attempt to put pending rx data in the socket buffer */
|
|
|
|
lock_sock(sk);
|
|
|
|
if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state))
|
|
goto done;
|
|
|
|
if (pi->rx_busy_skb) {
|
|
if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb))
|
|
pi->rx_busy_skb = NULL;
|
|
else
|
|
goto done;
|
|
}
|
|
|
|
/* Restore data flow when half of the receive buffer is
|
|
* available. This avoids resending large numbers of
|
|
* frames.
|
|
*/
|
|
if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1)
|
|
l2cap_chan_busy(pi->chan, 0);
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
/* Kill socket (only if zapped and orphan)
|
|
* Must be called on unlocked socket.
|
|
*/
|
|
static void l2cap_sock_kill(struct sock *sk)
|
|
{
|
|
if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
|
|
return;
|
|
|
|
BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state));
|
|
|
|
/* Kill poor orphan */
|
|
|
|
l2cap_chan_put(l2cap_pi(sk)->chan);
|
|
sock_set_flag(sk, SOCK_DEAD);
|
|
sock_put(sk);
|
|
}
|
|
|
|
static int __l2cap_wait_ack(struct sock *sk)
|
|
{
|
|
struct l2cap_chan *chan = l2cap_pi(sk)->chan;
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
int err = 0;
|
|
int timeo = HZ/5;
|
|
|
|
add_wait_queue(sk_sleep(sk), &wait);
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
while (chan->unacked_frames > 0 && chan->conn) {
|
|
if (!timeo)
|
|
timeo = HZ/5;
|
|
|
|
if (signal_pending(current)) {
|
|
err = sock_intr_errno(timeo);
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
timeo = schedule_timeout(timeo);
|
|
lock_sock(sk);
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
err = sock_error(sk);
|
|
if (err)
|
|
break;
|
|
}
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(sk_sleep(sk), &wait);
|
|
return err;
|
|
}
|
|
|
|
static int l2cap_sock_shutdown(struct socket *sock, int how)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct l2cap_chan *chan;
|
|
struct l2cap_conn *conn;
|
|
int err = 0;
|
|
|
|
BT_DBG("sock %p, sk %p", sock, sk);
|
|
|
|
if (!sk)
|
|
return 0;
|
|
|
|
chan = l2cap_pi(sk)->chan;
|
|
conn = chan->conn;
|
|
|
|
if (conn)
|
|
mutex_lock(&conn->chan_lock);
|
|
|
|
l2cap_chan_lock(chan);
|
|
lock_sock(sk);
|
|
|
|
if (!sk->sk_shutdown) {
|
|
if (chan->mode == L2CAP_MODE_ERTM)
|
|
err = __l2cap_wait_ack(sk);
|
|
|
|
sk->sk_shutdown = SHUTDOWN_MASK;
|
|
|
|
release_sock(sk);
|
|
l2cap_chan_close(chan, 0);
|
|
lock_sock(sk);
|
|
|
|
if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime)
|
|
err = bt_sock_wait_state(sk, BT_CLOSED,
|
|
sk->sk_lingertime);
|
|
}
|
|
|
|
if (!err && sk->sk_err)
|
|
err = -sk->sk_err;
|
|
|
|
release_sock(sk);
|
|
l2cap_chan_unlock(chan);
|
|
|
|
if (conn)
|
|
mutex_unlock(&conn->chan_lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int l2cap_sock_release(struct socket *sock)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
int err;
|
|
|
|
BT_DBG("sock %p, sk %p", sock, sk);
|
|
|
|
if (!sk)
|
|
return 0;
|
|
|
|
bt_sock_unlink(&l2cap_sk_list, sk);
|
|
|
|
err = l2cap_sock_shutdown(sock, 2);
|
|
|
|
sock_orphan(sk);
|
|
l2cap_sock_kill(sk);
|
|
return err;
|
|
}
|
|
|
|
static void l2cap_sock_cleanup_listen(struct sock *parent)
|
|
{
|
|
struct sock *sk;
|
|
|
|
BT_DBG("parent %p", parent);
|
|
|
|
/* Close not yet accepted channels */
|
|
while ((sk = bt_accept_dequeue(parent, NULL))) {
|
|
struct l2cap_chan *chan = l2cap_pi(sk)->chan;
|
|
|
|
l2cap_chan_lock(chan);
|
|
__clear_chan_timer(chan);
|
|
l2cap_chan_close(chan, ECONNRESET);
|
|
l2cap_chan_unlock(chan);
|
|
|
|
l2cap_sock_kill(sk);
|
|
}
|
|
}
|
|
|
|
static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan)
|
|
{
|
|
struct sock *sk, *parent = chan->data;
|
|
|
|
lock_sock(parent);
|
|
|
|
/* Check for backlog size */
|
|
if (sk_acceptq_is_full(parent)) {
|
|
BT_DBG("backlog full %d", parent->sk_ack_backlog);
|
|
return NULL;
|
|
}
|
|
|
|
sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP,
|
|
GFP_ATOMIC);
|
|
if (!sk)
|
|
return NULL;
|
|
|
|
bt_sock_reclassify_lock(sk, BTPROTO_L2CAP);
|
|
|
|
l2cap_sock_init(sk, parent);
|
|
|
|
bt_accept_enqueue(parent, sk);
|
|
|
|
release_sock(parent);
|
|
|
|
return l2cap_pi(sk)->chan;
|
|
}
|
|
|
|
static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb)
|
|
{
|
|
struct sock *sk = chan->data;
|
|
int err;
|
|
|
|
lock_sock(sk);
|
|
|
|
if (l2cap_pi(sk)->rx_busy_skb) {
|
|
err = -ENOMEM;
|
|
goto done;
|
|
}
|
|
|
|
err = sock_queue_rcv_skb(sk, skb);
|
|
|
|
/* For ERTM, handle one skb that doesn't fit into the recv
|
|
* buffer. This is important to do because the data frames
|
|
* have already been acked, so the skb cannot be discarded.
|
|
*
|
|
* Notify the l2cap core that the buffer is full, so the
|
|
* LOCAL_BUSY state is entered and no more frames are
|
|
* acked and reassembled until there is buffer space
|
|
* available.
|
|
*/
|
|
if (err < 0 && chan->mode == L2CAP_MODE_ERTM) {
|
|
l2cap_pi(sk)->rx_busy_skb = skb;
|
|
l2cap_chan_busy(chan, 1);
|
|
err = 0;
|
|
}
|
|
|
|
done:
|
|
release_sock(sk);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void l2cap_sock_close_cb(struct l2cap_chan *chan)
|
|
{
|
|
struct sock *sk = chan->data;
|
|
|
|
l2cap_sock_kill(sk);
|
|
}
|
|
|
|
static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err)
|
|
{
|
|
struct sock *sk = chan->data;
|
|
struct sock *parent;
|
|
|
|
lock_sock(sk);
|
|
|
|
parent = bt_sk(sk)->parent;
|
|
|
|
sock_set_flag(sk, SOCK_ZAPPED);
|
|
|
|
switch (chan->state) {
|
|
case BT_OPEN:
|
|
case BT_BOUND:
|
|
case BT_CLOSED:
|
|
break;
|
|
case BT_LISTEN:
|
|
l2cap_sock_cleanup_listen(sk);
|
|
sk->sk_state = BT_CLOSED;
|
|
chan->state = BT_CLOSED;
|
|
|
|
break;
|
|
default:
|
|
sk->sk_state = BT_CLOSED;
|
|
chan->state = BT_CLOSED;
|
|
|
|
sk->sk_err = err;
|
|
|
|
if (parent) {
|
|
bt_accept_unlink(sk);
|
|
parent->sk_data_ready(parent, 0);
|
|
} else {
|
|
sk->sk_state_change(sk);
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
}
|
|
|
|
static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state,
|
|
int err)
|
|
{
|
|
struct sock *sk = chan->data;
|
|
|
|
sk->sk_state = state;
|
|
|
|
if (err)
|
|
sk->sk_err = err;
|
|
}
|
|
|
|
static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan,
|
|
unsigned long len, int nb)
|
|
{
|
|
struct sock *sk = chan->data;
|
|
struct sk_buff *skb;
|
|
int err;
|
|
|
|
l2cap_chan_unlock(chan);
|
|
skb = bt_skb_send_alloc(sk, len, nb, &err);
|
|
l2cap_chan_lock(chan);
|
|
|
|
if (!skb)
|
|
return ERR_PTR(err);
|
|
|
|
bt_cb(skb)->chan = chan;
|
|
|
|
return skb;
|
|
}
|
|
|
|
static void l2cap_sock_ready_cb(struct l2cap_chan *chan)
|
|
{
|
|
struct sock *sk = chan->data;
|
|
struct sock *parent;
|
|
|
|
lock_sock(sk);
|
|
|
|
parent = bt_sk(sk)->parent;
|
|
|
|
BT_DBG("sk %p, parent %p", sk, parent);
|
|
|
|
sk->sk_state = BT_CONNECTED;
|
|
sk->sk_state_change(sk);
|
|
|
|
if (parent)
|
|
parent->sk_data_ready(parent, 0);
|
|
|
|
release_sock(sk);
|
|
}
|
|
|
|
static void l2cap_sock_defer_cb(struct l2cap_chan *chan)
|
|
{
|
|
struct sock *parent, *sk = chan->data;
|
|
|
|
lock_sock(sk);
|
|
|
|
parent = bt_sk(sk)->parent;
|
|
if (parent)
|
|
parent->sk_data_ready(parent, 0);
|
|
|
|
release_sock(sk);
|
|
}
|
|
|
|
static void l2cap_sock_resume_cb(struct l2cap_chan *chan)
|
|
{
|
|
struct sock *sk = chan->data;
|
|
|
|
clear_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags);
|
|
sk->sk_state_change(sk);
|
|
}
|
|
|
|
static void l2cap_sock_set_shutdown_cb(struct l2cap_chan *chan)
|
|
{
|
|
struct sock *sk = chan->data;
|
|
|
|
lock_sock(sk);
|
|
sk->sk_shutdown = SHUTDOWN_MASK;
|
|
release_sock(sk);
|
|
}
|
|
|
|
static long l2cap_sock_get_sndtimeo_cb(struct l2cap_chan *chan)
|
|
{
|
|
struct sock *sk = chan->data;
|
|
|
|
return sk->sk_sndtimeo;
|
|
}
|
|
|
|
static void l2cap_sock_suspend_cb(struct l2cap_chan *chan)
|
|
{
|
|
struct sock *sk = chan->data;
|
|
|
|
set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags);
|
|
sk->sk_state_change(sk);
|
|
}
|
|
|
|
static struct l2cap_ops l2cap_chan_ops = {
|
|
.name = "L2CAP Socket Interface",
|
|
.new_connection = l2cap_sock_new_connection_cb,
|
|
.recv = l2cap_sock_recv_cb,
|
|
.close = l2cap_sock_close_cb,
|
|
.teardown = l2cap_sock_teardown_cb,
|
|
.state_change = l2cap_sock_state_change_cb,
|
|
.ready = l2cap_sock_ready_cb,
|
|
.defer = l2cap_sock_defer_cb,
|
|
.resume = l2cap_sock_resume_cb,
|
|
.suspend = l2cap_sock_suspend_cb,
|
|
.set_shutdown = l2cap_sock_set_shutdown_cb,
|
|
.get_sndtimeo = l2cap_sock_get_sndtimeo_cb,
|
|
.alloc_skb = l2cap_sock_alloc_skb_cb,
|
|
};
|
|
|
|
static void l2cap_sock_destruct(struct sock *sk)
|
|
{
|
|
BT_DBG("sk %p", sk);
|
|
|
|
if (l2cap_pi(sk)->chan)
|
|
l2cap_chan_put(l2cap_pi(sk)->chan);
|
|
|
|
if (l2cap_pi(sk)->rx_busy_skb) {
|
|
kfree_skb(l2cap_pi(sk)->rx_busy_skb);
|
|
l2cap_pi(sk)->rx_busy_skb = NULL;
|
|
}
|
|
|
|
skb_queue_purge(&sk->sk_receive_queue);
|
|
skb_queue_purge(&sk->sk_write_queue);
|
|
}
|
|
|
|
static void l2cap_skb_msg_name(struct sk_buff *skb, void *msg_name,
|
|
int *msg_namelen)
|
|
{
|
|
DECLARE_SOCKADDR(struct sockaddr_l2 *, la, msg_name);
|
|
|
|
memset(la, 0, sizeof(struct sockaddr_l2));
|
|
la->l2_family = AF_BLUETOOTH;
|
|
la->l2_psm = bt_cb(skb)->psm;
|
|
bacpy(&la->l2_bdaddr, &bt_cb(skb)->bdaddr);
|
|
|
|
*msg_namelen = sizeof(struct sockaddr_l2);
|
|
}
|
|
|
|
static void l2cap_sock_init(struct sock *sk, struct sock *parent)
|
|
{
|
|
struct l2cap_chan *chan = l2cap_pi(sk)->chan;
|
|
|
|
BT_DBG("sk %p", sk);
|
|
|
|
if (parent) {
|
|
struct l2cap_chan *pchan = l2cap_pi(parent)->chan;
|
|
|
|
sk->sk_type = parent->sk_type;
|
|
bt_sk(sk)->flags = bt_sk(parent)->flags;
|
|
|
|
chan->chan_type = pchan->chan_type;
|
|
chan->imtu = pchan->imtu;
|
|
chan->omtu = pchan->omtu;
|
|
chan->conf_state = pchan->conf_state;
|
|
chan->mode = pchan->mode;
|
|
chan->fcs = pchan->fcs;
|
|
chan->max_tx = pchan->max_tx;
|
|
chan->tx_win = pchan->tx_win;
|
|
chan->tx_win_max = pchan->tx_win_max;
|
|
chan->sec_level = pchan->sec_level;
|
|
chan->flags = pchan->flags;
|
|
chan->tx_credits = pchan->tx_credits;
|
|
chan->rx_credits = pchan->rx_credits;
|
|
|
|
security_sk_clone(parent, sk);
|
|
} else {
|
|
switch (sk->sk_type) {
|
|
case SOCK_RAW:
|
|
chan->chan_type = L2CAP_CHAN_RAW;
|
|
break;
|
|
case SOCK_DGRAM:
|
|
chan->chan_type = L2CAP_CHAN_CONN_LESS;
|
|
bt_sk(sk)->skb_msg_name = l2cap_skb_msg_name;
|
|
break;
|
|
case SOCK_SEQPACKET:
|
|
case SOCK_STREAM:
|
|
chan->chan_type = L2CAP_CHAN_CONN_ORIENTED;
|
|
break;
|
|
}
|
|
|
|
chan->imtu = L2CAP_DEFAULT_MTU;
|
|
chan->omtu = 0;
|
|
if (!disable_ertm && sk->sk_type == SOCK_STREAM) {
|
|
chan->mode = L2CAP_MODE_ERTM;
|
|
set_bit(CONF_STATE2_DEVICE, &chan->conf_state);
|
|
} else {
|
|
chan->mode = L2CAP_MODE_BASIC;
|
|
}
|
|
|
|
l2cap_chan_set_defaults(chan);
|
|
}
|
|
|
|
/* Default config options */
|
|
chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;
|
|
|
|
chan->data = sk;
|
|
chan->ops = &l2cap_chan_ops;
|
|
}
|
|
|
|
static struct proto l2cap_proto = {
|
|
.name = "L2CAP",
|
|
.owner = THIS_MODULE,
|
|
.obj_size = sizeof(struct l2cap_pinfo)
|
|
};
|
|
|
|
static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock,
|
|
int proto, gfp_t prio)
|
|
{
|
|
struct sock *sk;
|
|
struct l2cap_chan *chan;
|
|
|
|
sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto);
|
|
if (!sk)
|
|
return NULL;
|
|
|
|
sock_init_data(sock, sk);
|
|
INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
|
|
|
|
sk->sk_destruct = l2cap_sock_destruct;
|
|
sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT;
|
|
|
|
sock_reset_flag(sk, SOCK_ZAPPED);
|
|
|
|
sk->sk_protocol = proto;
|
|
sk->sk_state = BT_OPEN;
|
|
|
|
chan = l2cap_chan_create();
|
|
if (!chan) {
|
|
sk_free(sk);
|
|
return NULL;
|
|
}
|
|
|
|
l2cap_chan_hold(chan);
|
|
|
|
l2cap_pi(sk)->chan = chan;
|
|
|
|
return sk;
|
|
}
|
|
|
|
static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol,
|
|
int kern)
|
|
{
|
|
struct sock *sk;
|
|
|
|
BT_DBG("sock %p", sock);
|
|
|
|
sock->state = SS_UNCONNECTED;
|
|
|
|
if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM &&
|
|
sock->type != SOCK_DGRAM && sock->type != SOCK_RAW)
|
|
return -ESOCKTNOSUPPORT;
|
|
|
|
if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
|
|
return -EPERM;
|
|
|
|
sock->ops = &l2cap_sock_ops;
|
|
|
|
sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC);
|
|
if (!sk)
|
|
return -ENOMEM;
|
|
|
|
l2cap_sock_init(sk, NULL);
|
|
bt_sock_link(&l2cap_sk_list, sk);
|
|
return 0;
|
|
}
|
|
|
|
static const struct proto_ops l2cap_sock_ops = {
|
|
.family = PF_BLUETOOTH,
|
|
.owner = THIS_MODULE,
|
|
.release = l2cap_sock_release,
|
|
.bind = l2cap_sock_bind,
|
|
.connect = l2cap_sock_connect,
|
|
.listen = l2cap_sock_listen,
|
|
.accept = l2cap_sock_accept,
|
|
.getname = l2cap_sock_getname,
|
|
.sendmsg = l2cap_sock_sendmsg,
|
|
.recvmsg = l2cap_sock_recvmsg,
|
|
.poll = bt_sock_poll,
|
|
.ioctl = bt_sock_ioctl,
|
|
.mmap = sock_no_mmap,
|
|
.socketpair = sock_no_socketpair,
|
|
.shutdown = l2cap_sock_shutdown,
|
|
.setsockopt = l2cap_sock_setsockopt,
|
|
.getsockopt = l2cap_sock_getsockopt
|
|
};
|
|
|
|
static const struct net_proto_family l2cap_sock_family_ops = {
|
|
.family = PF_BLUETOOTH,
|
|
.owner = THIS_MODULE,
|
|
.create = l2cap_sock_create,
|
|
};
|
|
|
|
int __init l2cap_init_sockets(void)
|
|
{
|
|
int err;
|
|
|
|
err = proto_register(&l2cap_proto, 0);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops);
|
|
if (err < 0) {
|
|
BT_ERR("L2CAP socket registration failed");
|
|
goto error;
|
|
}
|
|
|
|
err = bt_procfs_init(&init_net, "l2cap", &l2cap_sk_list,
|
|
NULL);
|
|
if (err < 0) {
|
|
BT_ERR("Failed to create L2CAP proc file");
|
|
bt_sock_unregister(BTPROTO_L2CAP);
|
|
goto error;
|
|
}
|
|
|
|
BT_INFO("L2CAP socket layer initialized");
|
|
|
|
return 0;
|
|
|
|
error:
|
|
proto_unregister(&l2cap_proto);
|
|
return err;
|
|
}
|
|
|
|
void l2cap_cleanup_sockets(void)
|
|
{
|
|
bt_procfs_cleanup(&init_net, "l2cap");
|
|
bt_sock_unregister(BTPROTO_L2CAP);
|
|
proto_unregister(&l2cap_proto);
|
|
}
|
|
|
|
module_param(enable_lecoc, bool, 0644);
|
|
MODULE_PARM_DESC(enable_lecoc, "Enable support for LE CoC");
|