android/android_kernel_asus_sm8350
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Bluetooth: Add basic LE L2CAP connect request receiving support

Browse Source 
This patch adds the necessary boiler plate code to handle receiving
L2CAP connect requests over LE and respond to them with a proper connect
response.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2013-05-14 13:27:21 +03:00 committed by Marcel Holtmann
parent 791d60f71a
commit 27e2d4c8d2
2 changed files with 153 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/net/bluetooth/l2cap.h
View File

@ -846,6 +846,7 @@ int l2cap_init_sockets(void);
void l2cap_cleanup_sockets(void);
bool l2cap_is_socket(struct socket *sock);
void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan);
void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);

152
net/bluetooth/l2cap_core.c
View File

@ -617,6 +617,29 @@ void l2cap_chan_del(struct l2cap_chan *chan, int err)
return;
}
static void l2cap_chan_le_connect_reject(struct l2cap_chan *chan)
{
struct l2cap_conn *conn = chan->conn;
struct l2cap_le_conn_rsp rsp;
u16 result;
if (test_bit(FLAG_DEFER_SETUP, &chan->flags))
result = L2CAP_CR_AUTHORIZATION;
else
result = L2CAP_CR_BAD_PSM;
l2cap_state_change(chan, BT_DISCONN);
rsp.dcid = cpu_to_le16(chan->scid);
rsp.mtu = cpu_to_le16(chan->imtu);
rsp.mps = __constant_cpu_to_le16(L2CAP_LE_DEFAULT_MPS);
rsp.credits = __constant_cpu_to_le16(L2CAP_LE_MAX_CREDITS);
rsp.result = cpu_to_le16(result);
l2cap_send_cmd(conn, chan->ident, L2CAP_LE_CONN_RSP, sizeof(rsp),
&rsp);
}
static void l2cap_chan_connect_reject(struct l2cap_chan *chan)
{
struct l2cap_conn *conn = chan->conn;
@ -663,6 +686,8 @@ void l2cap_chan_close(struct l2cap_chan *chan, int reason)
if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED) {
if (conn->hcon->type == ACL_LINK)
l2cap_chan_connect_reject(chan);
else if (conn->hcon->type == LE_LINK)
l2cap_chan_le_connect_reject(chan);
}
l2cap_chan_del(chan, reason);
@ -3641,6 +3666,23 @@ static int l2cap_build_conf_rsp(struct l2cap_chan *chan, void *data,
return ptr - data;
}
void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan)
{
struct l2cap_le_conn_rsp rsp;
struct l2cap_conn *conn = chan->conn;
BT_DBG("chan %p", chan);
rsp.dcid = cpu_to_le16(chan->scid);
rsp.mtu = cpu_to_le16(chan->imtu);
rsp.mps = __constant_cpu_to_le16(L2CAP_LE_DEFAULT_MPS);
rsp.credits = __constant_cpu_to_le16(L2CAP_LE_MAX_CREDITS);
rsp.result = __constant_cpu_to_le16(L2CAP_CR_SUCCESS);
l2cap_send_cmd(conn, chan->ident, L2CAP_LE_CONN_RSP, sizeof(rsp),
&rsp);
}
void __l2cap_connect_rsp_defer(struct l2cap_chan *chan)
{
struct l2cap_conn_rsp rsp;
@ -5382,6 +5424,113 @@ static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn,
return err;
}
static int l2cap_le_connect_req(struct l2cap_conn *conn,
struct l2cap_cmd_hdr *cmd, u16 cmd_len,
u8 *data)
{
struct l2cap_le_conn_req *req = (struct l2cap_le_conn_req *) data;
struct l2cap_le_conn_rsp rsp;
struct l2cap_chan *chan, *pchan;
u16 dcid, scid, mtu, mps;
__le16 psm;
u8 result;
if (cmd_len != sizeof(*req))
return -EPROTO;
scid = __le16_to_cpu(req->scid);
mtu = __le16_to_cpu(req->mtu);
mps = __le16_to_cpu(req->mps);
psm = req->psm;
dcid = 0;
if (mtu < 23 || mps < 23)
return -EPROTO;
BT_DBG("psm 0x%2.2x scid 0x%4.4x mtu %u mps %u", __le16_to_cpu(psm),
scid, mtu, mps);
/* Check if we have socket listening on psm */
pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, &conn->hcon->src,
&conn->hcon->dst, LE_LINK);
if (!pchan) {
result = L2CAP_CR_BAD_PSM;
chan = NULL;
goto response;
}
mutex_lock(&conn->chan_lock);
l2cap_chan_lock(pchan);
if (!smp_sufficient_security(conn->hcon, pchan->sec_level)) {
result = L2CAP_CR_AUTHENTICATION;
chan = NULL;
goto response_unlock;
}
/* Check if we already have channel with that dcid */
if (__l2cap_get_chan_by_dcid(conn, scid)) {
result = L2CAP_CR_NO_MEM;
chan = NULL;
goto response_unlock;
}
chan = pchan->ops->new_connection(pchan);
if (!chan) {
result = L2CAP_CR_NO_MEM;
goto response_unlock;
}
bacpy(&chan->src, &conn->hcon->src);
bacpy(&chan->dst, &conn->hcon->dst);
chan->src_type = bdaddr_type(conn->hcon, conn->hcon->src_type);
chan->dst_type = bdaddr_type(conn->hcon, conn->hcon->dst_type);
chan->psm = psm;
chan->dcid = scid;
chan->omtu = mtu;
chan->remote_mps = mps;
__l2cap_chan_add(conn, chan);
dcid = chan->scid;
__set_chan_timer(chan, chan->ops->get_sndtimeo(chan));
chan->ident = cmd->ident;
if (test_bit(FLAG_DEFER_SETUP, &chan->flags)) {
l2cap_state_change(chan, BT_CONNECT2);
result = L2CAP_CR_PEND;
chan->ops->defer(chan);
} else {
l2cap_chan_ready(chan);
result = L2CAP_CR_SUCCESS;
}
response_unlock:
l2cap_chan_unlock(pchan);
mutex_unlock(&conn->chan_lock);
if (result == L2CAP_CR_PEND)
return 0;
response:
if (chan) {
rsp.mtu = cpu_to_le16(chan->imtu);
rsp.mps = __constant_cpu_to_le16(L2CAP_LE_DEFAULT_MPS);
} else {
rsp.mtu = 0;
rsp.mps = 0;
}
rsp.dcid = cpu_to_le16(dcid);
rsp.credits = __constant_cpu_to_le16(L2CAP_LE_MAX_CREDITS);
rsp.result = cpu_to_le16(result);
l2cap_send_cmd(conn, cmd->ident, L2CAP_LE_CONN_RSP, sizeof(rsp), &rsp);
return 0;
}
static inline int l2cap_le_sig_cmd(struct l2cap_conn *conn,
struct l2cap_cmd_hdr *cmd, u16 cmd_len,
u8 *data)
@ -5400,6 +5549,9 @@ static inline int l2cap_le_sig_cmd(struct l2cap_conn *conn,
l2cap_le_connect_rsp(conn, cmd, cmd_len, data);
return 0;
case L2CAP_LE_CONN_REQ:
return l2cap_le_connect_req(conn, cmd, cmd_len, data);
default:
BT_ERR("Unknown LE signaling command 0x%2.2x", cmd->code);
return -EINVAL;