AMP channels can be moved between BR/EDR and AMP controllers using a
sequence of signals. Every attempted channel move involves a series of
four signals:
Move Initiator Move Responder
| |
| Move Channel Request |
| ----------------------------> |
| |
| Move Channel Response |
| <---------------------------- |
| |
| Move Channel Confirm |
| ----------------------------> |
| |
| Move Channel Confirm Response |
| <---------------------------- |
All four signals are sent even if the move fails.
Signed-off-by: Mat Martineau <mathewm@xxxxxxxxxxxxxx>
---
net/bluetooth/l2cap_core.c | 123 ++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 123 insertions(+), 0 deletions(-)
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index e38258b..ba64bab 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -2957,6 +2957,112 @@ static inline int l2cap_create_channel_rsp(struct l2cap_conn *conn,
return l2cap_connect_rsp(conn, cmd, data);
}
+static void l2cap_send_move_chan_rsp(struct l2cap_conn *conn, u8 ident,
+ u16 icid, u16 result)
+{
+ struct l2cap_move_chan_rsp rsp;
+
+ BT_DBG("icid %d, result %d", (int) icid, (int) result);
+
+ rsp.icid = cpu_to_le16(icid);
+ rsp.result = cpu_to_le16(result);
+
+ l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_RSP, sizeof(rsp), &rsp);
+}
+
+static void l2cap_send_move_chan_cfm(struct l2cap_conn *conn,
+ struct l2cap_chan *chan, u16 icid, u16 result)
+{
+ struct l2cap_move_chan_cfm cfm;
+ u8 ident;
+
+ BT_DBG("icid %d, result %d", (int) icid, (int) result);
+
+ ident = l2cap_get_ident(conn);
+ if (chan)
+ chan->ident = ident;
+
+ cfm.icid = cpu_to_le16(icid);
+ cfm.result = cpu_to_le16(result);
+
+ l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_CFM, sizeof(cfm), &cfm);
+}
+
+static void l2cap_send_move_chan_cfm_rsp(struct l2cap_conn *conn, u8 ident,
+ u16 icid)
+{
+ struct l2cap_move_chan_cfm_rsp rsp;
+
+ BT_DBG("icid %d", (int) icid);
+
+ rsp.icid = cpu_to_le16(icid);
+ l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_CFM_RSP, sizeof(rsp), &rsp);
+}
+
+static inline int l2cap_move_channel_req(struct l2cap_conn *conn,
+ struct l2cap_cmd_hdr *cmd, u8 *data)
+{
+ struct l2cap_move_chan_req *req = (struct l2cap_move_chan_req *) data;
+ u16 icid = 0;
+ u16 result = L2CAP_MOVE_CHAN_REFUSED_NOT_ALLOWED;
+
+ icid = le16_to_cpu(req->icid);
+
+ BT_DBG("icid %d, dest_amp_id %d", (int) icid, (int) req->dest_amp_id);
+
+ /* Placeholder: Always refuse */
+ l2cap_send_move_chan_rsp(conn, cmd->ident, icid, result);
+
+ return 0;
+}
+
+static inline int l2cap_move_channel_rsp(struct l2cap_conn *conn,
+ struct l2cap_cmd_hdr *cmd, u8 *data)
+{
+ struct l2cap_move_chan_rsp *rsp = (struct l2cap_move_chan_rsp *) data;
+ u16 icid, result;
+
+ icid = le16_to_cpu(rsp->icid);
+ result = le16_to_cpu(rsp->result);
+
+ BT_DBG("icid %d, result %d", (int) icid, (int) result);
+
+ /* Placeholder: Always unconfirmed */
+ l2cap_send_move_chan_cfm(conn, NULL, icid, L2CAP_MOVE_CHAN_UNCONFIRMED);
+
+ return 0;
+}
+
+static inline int l2cap_move_channel_confirm(struct l2cap_conn *conn,
+ struct l2cap_cmd_hdr *cmd, u8 *data)
+{
+ struct l2cap_move_chan_cfm *cfm = (struct l2cap_move_chan_cfm *) data;
+ u16 icid, result;
+
+ icid = le16_to_cpu(cfm->icid);
+ result = le16_to_cpu(cfm->result);
+
+ BT_DBG("icid %d, result %d", (int) icid, (int) result);
+
+ l2cap_send_move_chan_cfm_rsp(conn, cmd->ident, icid);
+
+ return 0;
+}
+
+static inline int l2cap_move_channel_confirm_rsp(struct l2cap_conn *conn,
+ struct l2cap_cmd_hdr *cmd, u8 *data)
+{
+ struct l2cap_move_chan_cfm_rsp *rsp =
+ (struct l2cap_move_chan_cfm_rsp *) data;
+ u16 icid;
+
+ icid = le16_to_cpu(rsp->icid);
+
+ BT_DBG("icid %d", (int) icid);
+
+ return 0;
+}
+
static inline int l2cap_check_conn_param(u16 min, u16 max, u16 latency,
u16 to_multiplier)
{
@@ -3077,6 +3183,23 @@ static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn,
err = l2cap_create_channel_rsp(conn, cmd, data);
break;
+ case L2CAP_MOVE_CHAN_REQ:
+ err = l2cap_move_channel_req(conn, cmd, data);
+ break;
+
+ case L2CAP_MOVE_CHAN_RSP:
+ err = l2cap_move_channel_rsp(conn, cmd, data);
+ break;
+
+ case L2CAP_MOVE_CHAN_CFM:
+ err = l2cap_move_channel_confirm(conn, cmd, data);
+ break;
+
+ case L2CAP_MOVE_CHAN_CFM_RSP:
+ err = l2cap_move_channel_confirm_rsp(conn, cmd, data);
+ break;
+
+
default:
BT_ERR("Unknown BR/EDR signaling command 0x%2.2x", cmd->code);
err = -EINVAL;
--
1.7.7
--
Mat Martineau
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum
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