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Bluetooth: Add BT_MODE socket option

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This adds BT_MODE socket option which can be used to set L2CAP modes,
including modes only supported over LE which were not supported using
the L2CAP_OPTIONS.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Luiz Augusto von Dentz 2020-03-27 11:32:15 -07:00 committed by Marcel Holtmann
parent b86b0b150f
commit 3ee7b7cd83
2 changed files with 120 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

8
include/net/bluetooth/bluetooth.h
View file

@ -139,6 +139,14 @@ struct bt_voice {
#define BT_PHY_LE_CODED_TX 0x00002000
#define BT_PHY_LE_CODED_RX 0x00004000
#define BT_MODE 15
#define BT_MODE_BASIC 0x00
#define BT_MODE_ERTM 0x01
#define BT_MODE_STREAMING 0x02
#define BT_MODE_LE_FLOWCTL 0x03
#define BT_MODE_EXT_FLOWCTL 0x04
__printf(1, 2)
void bt_info(const char *fmt, ...);
__printf(1, 2)

113
net/bluetooth/l2cap_sock.c
View file

@ -395,6 +395,24 @@ static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr,
return sizeof(struct sockaddr_l2);
}
static int l2cap_get_mode(struct l2cap_chan *chan)
{
switch (chan->mode) {
case L2CAP_MODE_BASIC:
return BT_MODE_BASIC;
case L2CAP_MODE_ERTM:
return BT_MODE_ERTM;
case L2CAP_MODE_STREAMING:
return BT_MODE_STREAMING;
case L2CAP_MODE_LE_FLOWCTL:
return BT_MODE_LE_FLOWCTL;
case L2CAP_MODE_EXT_FLOWCTL:
return BT_MODE_EXT_FLOWCTL;
}
return -EINVAL;
}
static int l2cap_sock_getsockopt_old(struct socket *sock, int optname,
char __user *optval, int __user *optlen)
{
@ -522,7 +540,7 @@ static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname,
struct bt_security sec;
struct bt_power pwr;
u32 phys;
int len, err = 0;
int len, mode, err = 0;
BT_DBG("sk %p", sk);
@ -638,6 +656,27 @@ static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname,
err = -EFAULT;
break;
case BT_MODE:
if (!enable_ecred) {
err = -ENOPROTOOPT;
break;
}
if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
err = -EINVAL;
break;
}
mode = l2cap_get_mode(chan);
if (mode < 0) {
err = mode;
break;
}
if (put_user(mode, (u8 __user *) optval))
err = -EFAULT;
break;
default:
err = -ENOPROTOOPT;
break;
@ -780,6 +819,45 @@ static int l2cap_sock_setsockopt_old(struct socket *sock, int optname,
return err;
}
static int l2cap_set_mode(struct l2cap_chan *chan, u8 mode)
{
switch (mode) {
case BT_MODE_BASIC:
if (bdaddr_type_is_le(chan->src_type))
return -EINVAL;
mode = L2CAP_MODE_BASIC;
clear_bit(CONF_STATE2_DEVICE, &chan->conf_state);
break;
case BT_MODE_ERTM:
if (!disable_ertm || bdaddr_type_is_le(chan->src_type))
return -EINVAL;
mode = L2CAP_MODE_ERTM;
break;
case BT_MODE_STREAMING:
if (!disable_ertm || bdaddr_type_is_le(chan->src_type))
return -EINVAL;
mode = L2CAP_MODE_STREAMING;
break;
case BT_MODE_LE_FLOWCTL:
if (!bdaddr_type_is_le(chan->src_type))
return -EINVAL;
mode = L2CAP_MODE_LE_FLOWCTL;
break;
case BT_MODE_EXT_FLOWCTL:
/* TODO: Add support for ECRED PDUs to BR/EDR */
if (!bdaddr_type_is_le(chan->src_type))
return -EINVAL;
mode = L2CAP_MODE_EXT_FLOWCTL;
break;
default:
return -EINVAL;
}
chan->mode = mode;
return 0;
}
static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname,
char __user *optval, unsigned int optlen)
{
@ -985,6 +1063,39 @@ static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname,
break;
case BT_MODE:
if (!enable_ecred) {
err = -ENOPROTOOPT;
break;
}
BT_DBG("sk->sk_state %u", sk->sk_state);
if (sk->sk_state != BT_BOUND) {
err = -EINVAL;
break;
}
if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
err = -EINVAL;
break;
}
if (get_user(opt, (u8 __user *) optval)) {
err = -EFAULT;
break;
}
BT_DBG("opt %u", opt);
err = l2cap_set_mode(chan, opt);
if (err)
break;
BT_DBG("mode 0x%2.2x", chan->mode);
break;
default:
err = -ENOPROTOOPT;
break;