Bluetooth: Add support for L2CAP SREJ exception
When L2CAP loses an I-frame we send a SREJ frame to the transmitter side
requesting the lost packet. This patch implement all Recv I-frame events
on SREJ_SENT state table except the ones that deal with SendRej (the REJ
exception at receiver side is yet not implemented).
Signed-off-by: Gustavo F. Padovan <gustavo@las.ic.unicamp.br>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index 59b26bf..9f2126a 100644
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -108,6 +108,7 @@
#define L2CAP_CTRL_TXSEQ_SHIFT 1
#define L2CAP_CTRL_REQSEQ_SHIFT 8
+#define L2CAP_CTRL_SAR_SHIFT 14
/* L2CAP Supervisory Function */
#define L2CAP_SUPER_RCV_READY 0x0000
@@ -290,6 +291,13 @@
/* ----- L2CAP channel and socket info ----- */
#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
#define TX_QUEUE(sk) (&l2cap_pi(sk)->tx_queue)
+#define SREJ_QUEUE(sk) (&l2cap_pi(sk)->srej_queue)
+#define SREJ_LIST(sk) (&l2cap_pi(sk)->srej_l.list)
+
+struct srej_list {
+ __u8 tx_seq;
+ struct list_head list;
+};
struct l2cap_pinfo {
struct bt_sock bt;
@@ -318,6 +326,8 @@
__u8 expected_ack_seq;
__u8 req_seq;
__u8 expected_tx_seq;
+ __u8 buffer_seq;
+ __u8 buffer_seq_srej;
__u8 unacked_frames;
__u8 retry_count;
__u8 num_to_ack;
@@ -338,6 +348,8 @@
struct timer_list retrans_timer;
struct timer_list monitor_timer;
struct sk_buff_head tx_queue;
+ struct sk_buff_head srej_queue;
+ struct srej_list srej_l;
struct l2cap_conn *conn;
struct sock *next_c;
struct sock *prev_c;
@@ -356,7 +368,7 @@
#define L2CAP_CONF_MAX_CONF_RSP 2
#define L2CAP_CONN_SAR_SDU 0x01
-#define L2CAP_CONN_UNDER_REJ 0x02
+#define L2CAP_CONN_SREJ_SENT 0x02
#define L2CAP_CONN_WAIT_F 0x04
#define __mod_retrans_timer() mod_timer(&l2cap_pi(sk)->retrans_timer, \