Bluetooth: Add basic constants for L2CAP ERTM support and use them
This adds the basic constants required to add support for L2CAP Enhanced
Retransmission feature.
Based on a patch from Nathan Holstein <nathan@lampreynetworks.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index 300b63f..e919fca 100644
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -26,8 +26,13 @@
#define __L2CAP_H
/* L2CAP defaults */
-#define L2CAP_DEFAULT_MTU 672
-#define L2CAP_DEFAULT_FLUSH_TO 0xFFFF
+#define L2CAP_DEFAULT_MTU 672
+#define L2CAP_DEFAULT_FLUSH_TO 0xffff
+#define L2CAP_DEFAULT_RX_WINDOW 1
+#define L2CAP_DEFAULT_MAX_RECEIVE 1
+#define L2CAP_DEFAULT_RETRANS_TO 300 /* 300 milliseconds */
+#define L2CAP_DEFAULT_MONITOR_TO 1000 /* 1 second */
+#define L2CAP_DEFAULT_MAX_RX_APDU 0xfff7
#define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */
#define L2CAP_INFO_TIMEOUT (4000) /* 4 seconds */
@@ -64,17 +69,29 @@
#define L2CAP_LM_SECURE 0x0020
/* L2CAP command codes */
-#define L2CAP_COMMAND_REJ 0x01
-#define L2CAP_CONN_REQ 0x02
-#define L2CAP_CONN_RSP 0x03
-#define L2CAP_CONF_REQ 0x04
-#define L2CAP_CONF_RSP 0x05
-#define L2CAP_DISCONN_REQ 0x06
-#define L2CAP_DISCONN_RSP 0x07
-#define L2CAP_ECHO_REQ 0x08
-#define L2CAP_ECHO_RSP 0x09
-#define L2CAP_INFO_REQ 0x0a
-#define L2CAP_INFO_RSP 0x0b
+#define L2CAP_COMMAND_REJ 0x01
+#define L2CAP_CONN_REQ 0x02
+#define L2CAP_CONN_RSP 0x03
+#define L2CAP_CONF_REQ 0x04
+#define L2CAP_CONF_RSP 0x05
+#define L2CAP_DISCONN_REQ 0x06
+#define L2CAP_DISCONN_RSP 0x07
+#define L2CAP_ECHO_REQ 0x08
+#define L2CAP_ECHO_RSP 0x09
+#define L2CAP_INFO_REQ 0x0a
+#define L2CAP_INFO_RSP 0x0b
+
+/* L2CAP feature mask */
+#define L2CAP_FEAT_FLOWCTL 0x00000001
+#define L2CAP_FEAT_RETRANS 0x00000002
+#define L2CAP_FEAT_ERTM 0x00000008
+#define L2CAP_FEAT_STREAMING 0x00000010
+#define L2CAP_FEAT_FCS 0x00000020
+#define L2CAP_FEAT_FIXED_CHAN 0x00000080
+
+/* L2CAP checksum option */
+#define L2CAP_FCS_NONE 0x00
+#define L2CAP_FCS_CRC16 0x01
/* L2CAP structures */
struct l2cap_hdr {
@@ -113,16 +130,16 @@
#define L2CAP_CID_DYN_END 0xffff
/* connect result */
-#define L2CAP_CR_SUCCESS 0x0000
-#define L2CAP_CR_PEND 0x0001
-#define L2CAP_CR_BAD_PSM 0x0002
-#define L2CAP_CR_SEC_BLOCK 0x0003
-#define L2CAP_CR_NO_MEM 0x0004
+#define L2CAP_CR_SUCCESS 0x0000
+#define L2CAP_CR_PEND 0x0001
+#define L2CAP_CR_BAD_PSM 0x0002
+#define L2CAP_CR_SEC_BLOCK 0x0003
+#define L2CAP_CR_NO_MEM 0x0004
/* connect status */
-#define L2CAP_CS_NO_INFO 0x0000
-#define L2CAP_CS_AUTHEN_PEND 0x0001
-#define L2CAP_CS_AUTHOR_PEND 0x0002
+#define L2CAP_CS_NO_INFO 0x0000
+#define L2CAP_CS_AUTHEN_PEND 0x0001
+#define L2CAP_CS_AUTHOR_PEND 0x0002
struct l2cap_conf_req {
__le16 dcid;
@@ -150,11 +167,13 @@
#define L2CAP_CONF_OPT_SIZE 2
#define L2CAP_CONF_HINT 0x80
+#define L2CAP_CONF_MASK 0x7f
#define L2CAP_CONF_MTU 0x01
#define L2CAP_CONF_FLUSH_TO 0x02
#define L2CAP_CONF_QOS 0x03
#define L2CAP_CONF_RFC 0x04
+#define L2CAP_CONF_FCS 0x05
#define L2CAP_CONF_MAX_SIZE 22
@@ -170,6 +189,8 @@
#define L2CAP_MODE_BASIC 0x00
#define L2CAP_MODE_RETRANS 0x01
#define L2CAP_MODE_FLOWCTL 0x02
+#define L2CAP_MODE_ERTM 0x03
+#define L2CAP_MODE_STREAM 0x04
struct l2cap_disconn_req {
__le16 dcid;