diff options
| -rw-r--r-- | net/bluetooth/l2cap.c | 204 |
1 files changed, 115 insertions, 89 deletions
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c index e5cd64a..068edf7 100644 --- a/net/bluetooth/l2cap.c +++ b/net/bluetooth/l2cap.c @@ -3475,120 +3475,146 @@ expected: return 0; } -static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) +static inline void l2cap_data_channel_rrframe(struct sock *sk, u16 rx_control) { struct l2cap_pinfo *pi = l2cap_pi(sk); u8 tx_seq = __get_reqseq(rx_control); - BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); - - if (L2CAP_CTRL_FINAL & rx_control) { - del_timer(&pi->monitor_timer); - if (pi->unacked_frames > 0) - __mod_retrans_timer(); - pi->conn_state &= ~L2CAP_CONN_WAIT_F; - } + if (rx_control & L2CAP_CTRL_POLL) { + l2cap_send_i_or_rr_or_rnr(sk); + pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; - switch (rx_control & L2CAP_CTRL_SUPERVISE) { - case L2CAP_SUPER_RCV_READY: - if (rx_control & L2CAP_CTRL_POLL) { - l2cap_send_i_or_rr_or_rnr(sk); - pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; - - } else if (rx_control & L2CAP_CTRL_FINAL) { - pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; - pi->expected_ack_seq = tx_seq; - l2cap_drop_acked_frames(sk); - - if (pi->conn_state & L2CAP_CONN_REJ_ACT) - pi->conn_state &= ~L2CAP_CONN_REJ_ACT; - else { - sk->sk_send_head = TX_QUEUE(sk)->next; - pi->next_tx_seq = pi->expected_ack_seq; - l2cap_ertm_send(sk); - } + } else if (rx_control & L2CAP_CTRL_FINAL) { + pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; + pi->expected_ack_seq = tx_seq; + l2cap_drop_acked_frames(sk); - } else { - pi->expected_ack_seq = tx_seq; - l2cap_drop_acked_frames(sk); + if (pi->conn_state & L2CAP_CONN_REJ_ACT) + pi->conn_state &= ~L2CAP_CONN_REJ_ACT; + else { + sk->sk_send_head = TX_QUEUE(sk)->next; + pi->next_tx_seq = pi->expected_ack_seq; + l2cap_ertm_send(sk); + } - if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && - (pi->unacked_frames > 0)) - __mod_retrans_timer(); + } else { + pi->expected_ack_seq = tx_seq; + l2cap_drop_acked_frames(sk); - pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; - if (pi->conn_state & L2CAP_CONN_SREJ_SENT) - l2cap_send_ack(pi); - else - l2cap_ertm_send(sk); - } - break; + if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && + (pi->unacked_frames > 0)) + __mod_retrans_timer(); - case L2CAP_SUPER_REJECT: pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; + if (pi->conn_state & L2CAP_CONN_SREJ_SENT) + l2cap_send_ack(pi); + else + l2cap_ertm_send(sk); + } +} - pi->expected_ack_seq = __get_reqseq(rx_control); - l2cap_drop_acked_frames(sk); +static inline void l2cap_data_channel_rejframe(struct sock *sk, u16 rx_control) +{ + struct l2cap_pinfo *pi = l2cap_pi(sk); + u8 tx_seq = __get_reqseq(rx_control); - if (rx_control & L2CAP_CTRL_FINAL) { - if (pi->conn_state & L2CAP_CONN_REJ_ACT) - pi->conn_state &= ~L2CAP_CONN_REJ_ACT; - else { - sk->sk_send_head = TX_QUEUE(sk)->next; - pi->next_tx_seq = pi->expected_ack_seq; - l2cap_ertm_send(sk); - } - } else { + pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; + + pi->expected_ack_seq = __get_reqseq(rx_control); + l2cap_drop_acked_frames(sk); + + if (rx_control & L2CAP_CTRL_FINAL) { + if (pi->conn_state & L2CAP_CONN_REJ_ACT) + pi->conn_state &= ~L2CAP_CONN_REJ_ACT; + else { sk->sk_send_head = TX_QUEUE(sk)->next; pi->next_tx_seq = pi->expected_ack_seq; l2cap_ertm_send(sk); - - if (pi->conn_state & L2CAP_CONN_WAIT_F) { - pi->srej_save_reqseq = tx_seq; - pi->conn_state |= L2CAP_CONN_REJ_ACT; - } } + } else { + sk->sk_send_head = TX_QUEUE(sk)->next; + pi->next_tx_seq = pi->expected_ack_seq; + l2cap_ertm_send(sk); - break; + if (pi->conn_state & L2CAP_CONN_WAIT_F) { + pi->srej_save_reqseq = tx_seq; + pi->conn_state |= L2CAP_CONN_REJ_ACT; + } + } +} +static inline void l2cap_data_channel_srejframe(struct sock *sk, u16 rx_control) +{ + struct l2cap_pinfo *pi = l2cap_pi(sk); + u8 tx_seq = __get_reqseq(rx_control); - case L2CAP_SUPER_SELECT_REJECT: - pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; + pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; - if (rx_control & L2CAP_CTRL_POLL) { - pi->expected_ack_seq = tx_seq; - l2cap_drop_acked_frames(sk); - l2cap_retransmit_frame(sk, tx_seq); - l2cap_ertm_send(sk); - if (pi->conn_state & L2CAP_CONN_WAIT_F) { - pi->srej_save_reqseq = tx_seq; - pi->conn_state |= L2CAP_CONN_SREJ_ACT; - } - } else if (rx_control & L2CAP_CTRL_FINAL) { - if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) && - pi->srej_save_reqseq == tx_seq) - pi->conn_state &= ~L2CAP_CONN_SREJ_ACT; - else - l2cap_retransmit_frame(sk, tx_seq); + if (rx_control & L2CAP_CTRL_POLL) { + pi->expected_ack_seq = tx_seq; + l2cap_drop_acked_frames(sk); + l2cap_retransmit_frame(sk, tx_seq); + l2cap_ertm_send(sk); + if (pi->conn_state & L2CAP_CONN_WAIT_F) { + pi->srej_save_reqseq = tx_seq; + pi->conn_state |= L2CAP_CONN_SREJ_ACT; } - else { + } else if (rx_control & L2CAP_CTRL_FINAL) { + if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) && + pi->srej_save_reqseq == tx_seq) + pi->conn_state &= ~L2CAP_CONN_SREJ_ACT; + else l2cap_retransmit_frame(sk, tx_seq); - if (pi->conn_state & L2CAP_CONN_WAIT_F) { - pi->srej_save_reqseq = tx_seq; - pi->conn_state |= L2CAP_CONN_SREJ_ACT; - } + } else { + l2cap_retransmit_frame(sk, tx_seq); + if (pi->conn_state & L2CAP_CONN_WAIT_F) { + pi->srej_save_reqseq = tx_seq; + pi->conn_state |= L2CAP_CONN_SREJ_ACT; } + } +} + +static inline void l2cap_data_channel_rnrframe(struct sock *sk, u16 rx_control) +{ + struct l2cap_pinfo *pi = l2cap_pi(sk); + u8 tx_seq = __get_reqseq(rx_control); + + pi->conn_state |= L2CAP_CONN_REMOTE_BUSY; + pi->expected_ack_seq = tx_seq; + l2cap_drop_acked_frames(sk); + + del_timer(&pi->retrans_timer); + if (rx_control & L2CAP_CTRL_POLL) { + u16 control = L2CAP_CTRL_FINAL; + l2cap_send_rr_or_rnr(pi, control); + } +} + +static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) +{ + BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); + + if (L2CAP_CTRL_FINAL & rx_control) { + del_timer(&l2cap_pi(sk)->monitor_timer); + if (l2cap_pi(sk)->unacked_frames > 0) + __mod_retrans_timer(); + l2cap_pi(sk)->conn_state &= ~L2CAP_CONN_WAIT_F; + } + + switch (rx_control & L2CAP_CTRL_SUPERVISE) { + case L2CAP_SUPER_RCV_READY: + l2cap_data_channel_rrframe(sk, rx_control); break; - case L2CAP_SUPER_RCV_NOT_READY: - pi->conn_state |= L2CAP_CONN_REMOTE_BUSY; - pi->expected_ack_seq = tx_seq; - l2cap_drop_acked_frames(sk); + case L2CAP_SUPER_REJECT: + l2cap_data_channel_rejframe(sk, rx_control); + break; - del_timer(&pi->retrans_timer); - if (rx_control & L2CAP_CTRL_POLL) { - u16 control = L2CAP_CTRL_FINAL; - l2cap_send_rr_or_rnr(pi, control); - } + case L2CAP_SUPER_SELECT_REJECT: + l2cap_data_channel_srejframe(sk, rx_control); + break; + + case L2CAP_SUPER_RCV_NOT_READY: + l2cap_data_channel_rnrframe(sk, rx_control); break; } |
