diff options
author | Andrei Emeltchenko <andrei.emeltchenko@intel.com> | 2011-10-11 13:37:44 +0300 |
---|---|---|
committer | Gustavo F. Padovan <padovan@profusion.mobi> | 2011-10-13 16:44:47 -0300 |
commit | ab784b7383735681660ccbdda4569fff196c2672 (patch) | |
tree | 4a66e85b5e65695d0cdfd190a3aadefa035edcba | |
parent | 57253fd8c91e76780e9628451f680efcbcc52c85 (diff) |
Bluetooth: EWS: rewrite handling Supervisory (S) bits
Supervisory bits occupy different windows in standard / extended control
fields. Convert hardcoded masks to relative ones and use shift to access
S-bit window.
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
-rw-r--r-- | include/net/bluetooth/l2cap.h | 27 | ||||
-rw-r--r-- | net/bluetooth/l2cap_core.c | 41 |
2 files changed, 45 insertions, 23 deletions
diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h index fa7edabde4d..f24f5cf820d 100644 --- a/include/net/bluetooth/l2cap.h +++ b/include/net/bluetooth/l2cap.h @@ -140,10 +140,10 @@ struct l2cap_conninfo { #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 /* L2CAP Supervisory Function */ -#define L2CAP_SUPER_RCV_READY 0x0000 -#define L2CAP_SUPER_REJECT 0x0004 -#define L2CAP_SUPER_RCV_NOT_READY 0x0008 -#define L2CAP_SUPER_SELECT_REJECT 0x000C +#define L2CAP_SUPER_RR 0x00 +#define L2CAP_SUPER_REJ 0x01 +#define L2CAP_SUPER_RNR 0x02 +#define L2CAP_SUPER_SREJ 0x03 /* L2CAP Segmentation and Reassembly */ #define L2CAP_SDU_UNSEGMENTED 0x0000 @@ -518,6 +518,25 @@ static inline int l2cap_tx_window_full(struct l2cap_chan *ch) #define __is_sframe(ctrl) ((ctrl) & L2CAP_CTRL_FRAME_TYPE) #define __is_sar_start(ctrl) (((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START) +static inline __u8 __get_ctrl_super(struct l2cap_chan *chan, __u32 ctrl) +{ + if (test_bit(FLAG_EXT_CTRL, &chan->flags)) + return (ctrl & L2CAP_EXT_CTRL_SUPERVISE) >> + L2CAP_EXT_CTRL_SUPER_SHIFT; + else + return (ctrl & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT; +} + +static inline __u32 __set_ctrl_super(struct l2cap_chan *chan, __u32 super) +{ + if (test_bit(FLAG_EXT_CTRL, &chan->flags)) + return (super << L2CAP_EXT_CTRL_SUPER_SHIFT) & + L2CAP_EXT_CTRL_SUPERVISE; + else + return (super << L2CAP_CTRL_SUPER_SHIFT) & + L2CAP_CTRL_SUPERVISE; +} + extern int disable_ertm; int l2cap_init_sockets(void); diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 6e343126f38..93b5da69cda 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -613,10 +613,10 @@ static inline void l2cap_send_sframe(struct l2cap_chan *chan, u16 control) static inline void l2cap_send_rr_or_rnr(struct l2cap_chan *chan, u16 control) { if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { - control |= L2CAP_SUPER_RCV_NOT_READY; + control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); set_bit(CONN_RNR_SENT, &chan->conn_state); } else - control |= L2CAP_SUPER_RCV_READY; + control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); control |= chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; @@ -1408,7 +1408,7 @@ static void l2cap_send_ack(struct l2cap_chan *chan) control |= chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { - control |= L2CAP_SUPER_RCV_NOT_READY; + control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); set_bit(CONN_RNR_SENT, &chan->conn_state); l2cap_send_sframe(chan, control); return; @@ -1417,7 +1417,7 @@ static void l2cap_send_ack(struct l2cap_chan *chan) if (l2cap_ertm_send(chan) > 0) return; - control |= L2CAP_SUPER_RCV_READY; + control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); l2cap_send_sframe(chan, control); } @@ -1426,7 +1426,7 @@ static void l2cap_send_srejtail(struct l2cap_chan *chan) struct srej_list *tail; u16 control; - control = L2CAP_SUPER_SELECT_REJECT; + control = __set_ctrl_super(chan, L2CAP_SUPER_SREJ); control |= L2CAP_CTRL_FINAL; tail = list_entry((&chan->srej_l)->prev, struct srej_list, list); @@ -3119,7 +3119,7 @@ static inline void l2cap_send_i_or_rr_or_rnr(struct l2cap_chan *chan) control |= chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { - control |= L2CAP_SUPER_RCV_NOT_READY; + control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); l2cap_send_sframe(chan, control); set_bit(CONN_RNR_SENT, &chan->conn_state); } @@ -3131,7 +3131,7 @@ static inline void l2cap_send_i_or_rr_or_rnr(struct l2cap_chan *chan) if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state) && chan->frames_sent == 0) { - control |= L2CAP_SUPER_RCV_READY; + control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); l2cap_send_sframe(chan, control); } } @@ -3287,7 +3287,7 @@ static void l2cap_ertm_enter_local_busy(struct l2cap_chan *chan) set_bit(CONN_LOCAL_BUSY, &chan->conn_state); control = chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; - control |= L2CAP_SUPER_RCV_NOT_READY; + control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); l2cap_send_sframe(chan, control); set_bit(CONN_RNR_SENT, &chan->conn_state); @@ -3303,7 +3303,8 @@ static void l2cap_ertm_exit_local_busy(struct l2cap_chan *chan) goto done; control = chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; - control |= L2CAP_SUPER_RCV_READY | L2CAP_CTRL_POLL; + control |= L2CAP_CTRL_POLL; + control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); l2cap_send_sframe(chan, control); chan->retry_count = 1; @@ -3367,7 +3368,7 @@ static void l2cap_resend_srejframe(struct l2cap_chan *chan, u8 tx_seq) kfree(l); return; } - control = L2CAP_SUPER_SELECT_REJECT; + control = __set_ctrl_super(chan, L2CAP_SUPER_SREJ); control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; l2cap_send_sframe(chan, control); list_del(&l->list); @@ -3381,7 +3382,7 @@ static void l2cap_send_srejframe(struct l2cap_chan *chan, u8 tx_seq) u16 control; while (tx_seq != chan->expected_tx_seq) { - control = L2CAP_SUPER_SELECT_REJECT; + control = __set_ctrl_super(chan, L2CAP_SUPER_SREJ); control |= chan->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; l2cap_send_sframe(chan, control); @@ -3645,10 +3646,12 @@ static inline void l2cap_data_channel_rnrframe(struct l2cap_chan *chan, u16 rx_c return; } - if (rx_control & L2CAP_CTRL_POLL) + if (rx_control & L2CAP_CTRL_POLL) { l2cap_send_srejtail(chan); - else - l2cap_send_sframe(chan, L2CAP_SUPER_RCV_READY); + } else { + rx_control = __set_ctrl_super(chan, L2CAP_SUPER_RR); + l2cap_send_sframe(chan, rx_control); + } } static inline int l2cap_data_channel_sframe(struct l2cap_chan *chan, u16 rx_control, struct sk_buff *skb) @@ -3663,20 +3666,20 @@ static inline int l2cap_data_channel_sframe(struct l2cap_chan *chan, u16 rx_cont clear_bit(CONN_WAIT_F, &chan->conn_state); } - switch (rx_control & L2CAP_CTRL_SUPERVISE) { - case L2CAP_SUPER_RCV_READY: + switch (__get_ctrl_super(chan, rx_control)) { + case L2CAP_SUPER_RR: l2cap_data_channel_rrframe(chan, rx_control); break; - case L2CAP_SUPER_REJECT: + case L2CAP_SUPER_REJ: l2cap_data_channel_rejframe(chan, rx_control); break; - case L2CAP_SUPER_SELECT_REJECT: + case L2CAP_SUPER_SREJ: l2cap_data_channel_srejframe(chan, rx_control); break; - case L2CAP_SUPER_RCV_NOT_READY: + case L2CAP_SUPER_RNR: l2cap_data_channel_rnrframe(chan, rx_control); break; } |