Bluetooth: Add signal handlers for channel creation

Handle both "create channel request" and "create channel response".
Signed-off-by: Mat Martineau <mathewm@codeaurora.org>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Acked-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

net/bluetooth/l2cap_core.c

@@ -3104,6 +3104,45 @@ static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cm
 	return 0;
 }
 
+static inline int l2cap_create_channel_req(struct l2cap_conn *conn,
+					struct l2cap_cmd_hdr *cmd, u16 cmd_len,
+					void *data)
+{
+	struct l2cap_create_chan_req *req = data;
+	struct l2cap_create_chan_rsp rsp;
+	u16 psm, scid;
+
+	if (cmd_len != sizeof(*req))
+		return -EPROTO;
+
+	if (!enable_hs)
+		return -EINVAL;
+
+	psm = le16_to_cpu(req->psm);
+	scid = le16_to_cpu(req->scid);
+
+	BT_DBG("psm %d, scid %d, amp_id %d", psm, scid, req->amp_id);
+
+	/* Placeholder: Always reject */
+	rsp.dcid = 0;
+	rsp.scid = cpu_to_le16(scid);
+	rsp.result = L2CAP_CR_NO_MEM;
+	rsp.status = L2CAP_CS_NO_INFO;
+
+	l2cap_send_cmd(conn, cmd->ident, L2CAP_CREATE_CHAN_RSP,
+		       sizeof(rsp), &rsp);
+
+	return 0;
+}
+
+static inline int l2cap_create_channel_rsp(struct l2cap_conn *conn,
+					struct l2cap_cmd_hdr *cmd, void *data)
+{
+	BT_DBG("conn %p", conn);
+
+	return l2cap_connect_rsp(conn, cmd, data);
+}
+
 static inline int l2cap_check_conn_param(u16 min, u16 max, u16 latency,
 							u16 to_multiplier)
 {
@@ -3216,6 +3255,14 @@ static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn,
 		err = l2cap_information_rsp(conn, cmd, data);
 		break;
 
+	case L2CAP_CREATE_CHAN_REQ:
+		err = l2cap_create_channel_req(conn, cmd, cmd_len, data);
+		break;
+
+	case L2CAP_CREATE_CHAN_RSP:
+		err = l2cap_create_channel_rsp(conn, cmd, data);
+		break;
+
 	default:
 		BT_ERR("Unknown BR/EDR signaling command 0x%2.2x", cmd->code);
 		err = -EINVAL;