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Bluetooth: EWS: rewrite check frame type function 

Check frame function uses now information about control field type.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This commit is contained in:
Andrei Emeltchenko 2011-10-11 13:37:48 +03:00 committed by Gustavo F. Padovan
parent fb45de7dba
commit 793c2f1cb9
2 changed files with 21 additions and 6 deletions
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18
include/net/bluetooth/l2cap.h
View File

@ -548,8 +548,22 @@ static inline __u32 __set_txseq(struct l2cap_chan *chan, __u32 txseq)
return (txseq << L2CAP_CTRL_TXSEQ_SHIFT) & L2CAP_CTRL_TXSEQ;
}
#define __is_iframe(ctrl) (!((ctrl) & L2CAP_CTRL_FRAME_TYPE))
#define __is_sframe(ctrl) ((ctrl) & L2CAP_CTRL_FRAME_TYPE)
static inline bool __is_sframe(struct l2cap_chan *chan, __u32 ctrl)
{
if (test_bit(FLAG_EXT_CTRL, &chan->flags))
return ctrl & L2CAP_EXT_CTRL_FRAME_TYPE;
else
return ctrl & L2CAP_CTRL_FRAME_TYPE;
}
static inline __u32 __set_sframe(struct l2cap_chan *chan)
{
if (test_bit(FLAG_EXT_CTRL, &chan->flags))
return L2CAP_EXT_CTRL_FRAME_TYPE;
else
return L2CAP_CTRL_FRAME_TYPE;
}
static inline __u8 __get_ctrl_sar(struct l2cap_chan *chan, __u32 ctrl)
{
if (test_bit(FLAG_EXT_CTRL, &chan->flags))

9
net/bluetooth/l2cap_core.c
View File

@ -578,7 +578,8 @@ static inline void l2cap_send_sframe(struct l2cap_chan *chan, u16 control)
BT_DBG("chan %p, control 0x%2.2x", chan, control);
count = min_t(unsigned int, conn->mtu, hlen);
control |= L2CAP_CTRL_FRAME_TYPE;
control |= __set_sframe(chan);
if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state))
control |= L2CAP_CTRL_FINAL;
@ -3707,7 +3708,7 @@ static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb)
if (l2cap_check_fcs(chan, skb))
goto drop;
if (__is_sar_start(chan, control) && __is_iframe(control))
if (__is_sar_start(chan, control) && !__is_sframe(chan, control))
len -= 2;
if (chan->fcs == L2CAP_FCS_CRC16)
@ -3734,7 +3735,7 @@ static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb)
goto drop;
}
if (__is_iframe(control)) {
if (!__is_sframe(chan, control)) {
if (len < 0) {
l2cap_send_disconn_req(chan->conn, chan, ECONNRESET);
goto drop;
@ -3817,7 +3818,7 @@ static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk
if (chan->fcs == L2CAP_FCS_CRC16)
len -= 2;
if (len > chan->mps || len < 0 || __is_sframe(control))
if (len > chan->mps || len < 0 || __is_sframe(chan, control))
goto drop;
tx_seq = __get_txseq(chan, control);