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Bluetooth: Add basic constants for L2CAP ERTM support and use them

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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>
This commit is contained in:
Marcel Holtmann 2009-05-02 18:57:55 -07:00
parent af05b30bcb
commit 47ec1dcd69
2 changed files with 45 additions and 24 deletions
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23
include/net/bluetooth/l2cap.h
View file

@ -27,7 +27,12 @@
/* L2CAP defaults */
#define L2CAP_DEFAULT_MTU 672
#define L2CAP_DEFAULT_FLUSH_TO 0xFFFF
#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 */
@ -76,6 +81,18 @@ struct l2cap_conninfo {
#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 {
__le16 len;
@ -150,11 +167,13 @@ struct l2cap_conf_opt {
#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 @@ struct l2cap_conf_rfc {
#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;

6
net/bluetooth/l2cap.c
View file

@ -52,7 +52,7 @@
#define VERSION "2.13"
static u32 l2cap_feat_mask = 0x0080;
static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN;
static u8 l2cap_fixed_chan[8] = { 0x02, };
static const struct proto_ops l2cap_sock_ops;
@ -1747,7 +1747,7 @@ static int l2cap_parse_conf_req(struct sock *sk, void *data)
len -= l2cap_get_conf_opt(&req, &type, &olen, &val);
hint = type & L2CAP_CONF_HINT;
type &= 0x7f;
type &= L2CAP_CONF_MASK;
switch (type) {
case L2CAP_CONF_MTU:
@ -2244,7 +2244,7 @@ static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cm
if (type == L2CAP_IT_FEAT_MASK) {
conn->feat_mask = get_unaligned_le32(rsp->data);
if (conn->feat_mask & 0x0080) {
if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) {
struct l2cap_info_req req;
req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN);