/******************************************************************************
*
* Copyright 2016 The Android Open Source Project
* Copyright 2002-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* this file contains the connection interface functions
*
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "bt_types.h"
#include "l2c_api.h"
#include "l2cdefs.h"
#include "btm_api.h"
#include "btm_int.h"
#include "btu.h"
#include "hiddefs.h"
#include "bt_utils.h"
#include "hidd_api.h"
#include "hidd_int.h"
#include "osi/include/osi.h"
static void hidd_l2cif_connect_ind(const RawAddress& bd_addr, uint16_t cid,
uint16_t psm, uint8_t id);
static void hidd_l2cif_connect_cfm(uint16_t cid, uint16_t result);
static void hidd_l2cif_config_ind(uint16_t cid, tL2CAP_CFG_INFO* p_cfg);
static void hidd_l2cif_config_cfm(uint16_t cid, tL2CAP_CFG_INFO* p_cfg);
static void hidd_l2cif_disconnect_ind(uint16_t cid, bool ack_needed);
static void hidd_l2cif_disconnect_cfm(uint16_t cid, uint16_t result);
static void hidd_l2cif_data_ind(uint16_t cid, BT_HDR* p_msg);
static void hidd_l2cif_cong_ind(uint16_t cid, bool congested);
static const tL2CAP_APPL_INFO dev_reg_info = {
hidd_l2cif_connect_ind,
hidd_l2cif_connect_cfm,
NULL,
hidd_l2cif_config_ind,
hidd_l2cif_config_cfm,
hidd_l2cif_disconnect_ind,
hidd_l2cif_disconnect_cfm,
NULL,
hidd_l2cif_data_ind,
hidd_l2cif_cong_ind,
NULL,
NULL /* tL2CA_CREDITS_RECEIVED_CB */};
/*******************************************************************************
*
* Function hidd_check_config_done
*
* Description Checks if connection is configured and callback can be fired
*
* Returns void
*
******************************************************************************/
static void hidd_check_config_done() {
tHID_CONN* p_hcon;
p_hcon = &hd_cb.device.conn;
if (((p_hcon->conn_flags & HID_CONN_FLAGS_ALL_CONFIGURED) ==
HID_CONN_FLAGS_ALL_CONFIGURED) &&
(p_hcon->conn_state == HID_CONN_STATE_CONFIG)) {
p_hcon->conn_state = HID_CONN_STATE_CONNECTED;
hd_cb.device.state = HIDD_DEV_CONNECTED;
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_OPEN, 0, NULL);
// send outstanding data on intr
if (hd_cb.pending_data) {
L2CA_DataWrite(p_hcon->intr_cid, hd_cb.pending_data);
hd_cb.pending_data = NULL;
}
}
}
/*******************************************************************************
*
* Function hidh_sec_check_complete_term
*
* Description HID security check complete callback function.
*
* Returns Send L2CA_ConnectRsp OK if secutiry check succeed; otherwise
* send security block L2C connection response.
*
******************************************************************************/
static void hidd_sec_check_complete(UNUSED_ATTR const RawAddress* bd_addr,
UNUSED_ATTR tBT_TRANSPORT transport,
void* p_ref_data, uint8_t res) {
tHID_DEV_DEV_CTB* p_dev = (tHID_DEV_DEV_CTB*)p_ref_data;
if (res == BTM_SUCCESS && p_dev->conn.conn_state == HID_CONN_STATE_SECURITY) {
p_dev->conn.disc_reason = HID_SUCCESS;
p_dev->conn.conn_state = HID_CONN_STATE_CONNECTING_INTR;
L2CA_ConnectRsp(p_dev->addr, p_dev->conn.ctrl_id, p_dev->conn.ctrl_cid,
L2CAP_CONN_OK, L2CAP_CONN_OK);
L2CA_ConfigReq(p_dev->conn.ctrl_cid, &hd_cb.l2cap_cfg);
} else if (res != BTM_SUCCESS) {
HIDD_TRACE_WARNING("%s: connection rejected by security", __func__);
p_dev->conn.disc_reason = HID_ERR_AUTH_FAILED;
p_dev->conn.conn_state = HID_CONN_STATE_UNUSED;
L2CA_ConnectRsp(p_dev->addr, p_dev->conn.ctrl_id, p_dev->conn.ctrl_cid,
L2CAP_CONN_SECURITY_BLOCK, L2CAP_CONN_OK);
return;
}
}
/*******************************************************************************
*
* Function hidd_sec_check_complete_orig
*
* Description HID security check complete callback function (device
*originated)
*
* Returns void
*
******************************************************************************/
void hidd_sec_check_complete_orig(UNUSED_ATTR const RawAddress* bd_addr,
UNUSED_ATTR tBT_TRANSPORT transport,
void* p_ref_data, uint8_t res) {
tHID_DEV_DEV_CTB* p_dev = (tHID_DEV_DEV_CTB*)p_ref_data;
if (p_dev->conn.conn_state != HID_CONN_STATE_SECURITY) {
HIDD_TRACE_WARNING("%s: invalid state (%02x)", __func__,
p_dev->conn.conn_state);
return;
}
if (res == BTM_SUCCESS) {
HIDD_TRACE_EVENT("%s: security ok", __func__);
p_dev->conn.disc_reason = HID_SUCCESS;
p_dev->conn.conn_state = HID_CONN_STATE_CONFIG;
L2CA_ConfigReq(p_dev->conn.ctrl_cid, &hd_cb.l2cap_cfg);
} else {
HIDD_TRACE_WARNING("%s: security check failed (%02x)", __func__, res);
p_dev->conn.disc_reason = HID_ERR_AUTH_FAILED;
hidd_conn_disconnect();
}
}
/*******************************************************************************
*
* Function hidd_l2cif_connect_ind
*
* Description Handles incoming L2CAP connection (we act as server)
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_connect_ind(const RawAddress& bd_addr, uint16_t cid,
uint16_t psm, uint8_t id) {
tHID_CONN* p_hcon;
tHID_DEV_DEV_CTB* p_dev;
bool accept = TRUE; // accept by default
HIDD_TRACE_EVENT("%s: psm=%04x cid=%04x id=%02x", __func__, psm, cid, id);
p_dev = &hd_cb.device;
if (!hd_cb.allow_incoming) {
HIDD_TRACE_WARNING("%s: incoming connections not allowed, rejecting",
__func__);
L2CA_ConnectRsp(bd_addr, id, cid, L2CAP_CONN_NO_RESOURCES, 0);
return;
}
p_hcon = &hd_cb.device.conn;
switch (psm) {
case HID_PSM_INTERRUPT:
if (p_hcon->ctrl_cid == 0) {
accept = FALSE;
HIDD_TRACE_WARNING("%s: incoming INTR without CTRL, rejecting",
__func__);
}
if (p_hcon->conn_state != HID_CONN_STATE_CONNECTING_INTR) {
accept = FALSE;
HIDD_TRACE_WARNING("%s: incoming INTR in invalid state (%d), rejecting",
__func__, p_hcon->conn_state);
}
break;
case HID_PSM_CONTROL:
if (p_hcon->conn_state != HID_CONN_STATE_UNUSED) {
accept = FALSE;
HIDD_TRACE_WARNING("%s: incoming CTRL in invalid state (%d), rejecting",
__func__, p_hcon->conn_state);
}
break;
default:
accept = FALSE;
HIDD_TRACE_ERROR("%s: received invalid PSM, rejecting", __func__);
break;
}
if (!accept) {
L2CA_ConnectRsp(bd_addr, id, cid, L2CAP_CONN_NO_RESOURCES, 0);
return;
}
// for CTRL we need to go through security and we reply in callback from there
if (psm == HID_PSM_CONTROL) {
// We are ready to accept connection from this device, since we aren't
// connected to anything and are in the correct state.
p_dev->in_use = TRUE;
p_dev->addr = bd_addr;
p_dev->state = HIDD_DEV_NO_CONN;
p_hcon->conn_flags = 0;
p_hcon->ctrl_cid = cid;
p_hcon->ctrl_id = id;
p_hcon->disc_reason = HID_L2CAP_CONN_FAIL;
p_hcon->conn_state = HID_CONN_STATE_SECURITY;
if (btm_sec_mx_access_request(p_dev->addr, HID_PSM_CONTROL, FALSE,
BTM_SEC_PROTO_HID, HIDD_NOSEC_CHN,
&hidd_sec_check_complete,
p_dev) == BTM_CMD_STARTED) {
L2CA_ConnectRsp(bd_addr, id, cid, L2CAP_CONN_PENDING, L2CAP_CONN_OK);
}
return;
}
// for INTR we go directly to config state
p_hcon->conn_state = HID_CONN_STATE_CONFIG;
p_hcon->intr_cid = cid;
L2CA_ConnectRsp(bd_addr, id, cid, L2CAP_CONN_OK, L2CAP_CONN_OK);
L2CA_ConfigReq(cid, &hd_cb.l2cap_intr_cfg);
}
/*******************************************************************************
*
* Function hidd_l2cif_connect_cfm
*
* Description Handles L2CAP connection response (we act as client)
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_connect_cfm(uint16_t cid, uint16_t result) {
tHID_DEV_DEV_CTB* p_dev = &hd_cb.device;
tHID_CONN* p_hcon = &hd_cb.device.conn;
HIDD_TRACE_EVENT("%s: cid=%04x result=%d", __func__, cid, result);
if (p_hcon->ctrl_cid != cid && p_hcon->intr_cid != cid) {
HIDD_TRACE_WARNING("%s: unknown cid", __func__);
return;
}
if (!(p_hcon->conn_flags & HID_CONN_FLAGS_IS_ORIG) ||
((cid == p_hcon->ctrl_cid) &&
(p_hcon->conn_state != HID_CONN_STATE_CONNECTING_CTRL)) ||
((cid == p_hcon->intr_cid) &&
(p_hcon->conn_state != HID_CONN_STATE_CONNECTING_INTR))) {
HIDD_TRACE_WARNING("%s: unexpected", __func__);
return;
}
if (result != L2CAP_CONN_OK) {
HIDD_TRACE_WARNING("%s: connection failed, now disconnect", __func__);
if (cid == p_hcon->ctrl_cid)
p_hcon->ctrl_cid = 0;
else
p_hcon->intr_cid = 0;
hidd_conn_disconnect();
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_CLOSE,
HID_L2CAP_CONN_FAIL | (uint32_t)result, NULL);
return;
}
/* CTRL connect conf */
if (cid == p_hcon->ctrl_cid) {
p_hcon->conn_state = HID_CONN_STATE_SECURITY;
p_hcon->disc_reason =
HID_L2CAP_CONN_FAIL; /* in case disconnected before sec completed */
btm_sec_mx_access_request(p_dev->addr, HID_PSM_CONTROL, TRUE,
BTM_SEC_PROTO_HID, HIDD_SEC_CHN,
&hidd_sec_check_complete_orig, p_dev);
} else {
p_hcon->conn_state = HID_CONN_STATE_CONFIG;
L2CA_ConfigReq(cid, &hd_cb.l2cap_intr_cfg);
}
return;
}
/*******************************************************************************
*
* Function hidd_l2cif_config_ind
*
* Description Handles incoming L2CAP configuration request
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_config_ind(uint16_t cid, tL2CAP_CFG_INFO* p_cfg) {
tHID_CONN* p_hcon;
HIDD_TRACE_EVENT("%s: cid=%04x", __func__, cid);
p_hcon = &hd_cb.device.conn;
if (p_hcon->ctrl_cid != cid && p_hcon->intr_cid != cid) {
HIDD_TRACE_WARNING("%s: unknown cid", __func__);
return;
}
if ((!p_cfg->mtu_present) || (p_cfg->mtu > HID_DEV_MTU_SIZE))
p_hcon->rem_mtu_size = HID_DEV_MTU_SIZE;
else
p_hcon->rem_mtu_size = p_cfg->mtu;
// accept without changes
p_cfg->flush_to_present = FALSE;
p_cfg->mtu_present = FALSE;
p_cfg->result = L2CAP_CFG_OK;
if (cid == p_hcon->intr_cid && hd_cb.use_in_qos && !p_cfg->qos_present) {
p_cfg->qos_present = TRUE;
memcpy(&p_cfg->qos, &hd_cb.in_qos, sizeof(FLOW_SPEC));
}
L2CA_ConfigRsp(cid, p_cfg);
// update flags
if (cid == p_hcon->ctrl_cid) {
p_hcon->conn_flags |= HID_CONN_FLAGS_HIS_CTRL_CFG_DONE;
if ((p_hcon->conn_flags & HID_CONN_FLAGS_IS_ORIG) &&
(p_hcon->conn_flags & HID_CONN_FLAGS_MY_CTRL_CFG_DONE)) {
p_hcon->disc_reason = HID_L2CAP_CONN_FAIL;
if ((p_hcon->intr_cid =
L2CA_ConnectReq(HID_PSM_INTERRUPT, hd_cb.device.addr)) == 0) {
hidd_conn_disconnect();
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
HIDD_TRACE_WARNING("%s: could not start L2CAP connection for INTR",
__func__);
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_CLOSE,
HID_ERR_L2CAP_FAILED, NULL);
return;
} else {
p_hcon->conn_state = HID_CONN_STATE_CONNECTING_INTR;
}
}
} else {
p_hcon->conn_flags |= HID_CONN_FLAGS_HIS_INTR_CFG_DONE;
}
hidd_check_config_done();
}
/*******************************************************************************
*
* Function hidd_l2cif_config_cfm
*
* Description Handles incoming L2CAP configuration response
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_config_cfm(uint16_t cid, tL2CAP_CFG_INFO* p_cfg) {
tHID_CONN* p_hcon;
uint32_t reason;
HIDD_TRACE_EVENT("%s: cid=%04x pcfg->result=%d", __func__, cid,
p_cfg->result);
p_hcon = &hd_cb.device.conn;
if (p_hcon->ctrl_cid != cid && p_hcon->intr_cid != cid) {
HIDD_TRACE_WARNING("%s: unknown cid", __func__);
return;
}
if (p_hcon->intr_cid == cid &&
p_cfg->result == L2CAP_CFG_UNACCEPTABLE_PARAMS && p_cfg->qos_present) {
tL2CAP_CFG_INFO new_qos;
// QoS parameters not accepted for intr, try again with host proposal
memcpy(&new_qos, &hd_cb.l2cap_intr_cfg, sizeof(new_qos));
memcpy(&new_qos.qos, &p_cfg->qos, sizeof(FLOW_SPEC));
new_qos.qos_present = TRUE;
HIDD_TRACE_WARNING("%s: config failed, retry", __func__);
L2CA_ConfigReq(cid, &new_qos);
return;
} else if (p_hcon->intr_cid == cid &&
p_cfg->result == L2CAP_CFG_UNKNOWN_OPTIONS) {
// QoS not understood by remote device, try configuring without QoS
HIDD_TRACE_WARNING("%s: config failed, retry without QoS", __func__);
L2CA_ConfigReq(cid, &hd_cb.l2cap_cfg);
return;
} else if (p_cfg->result != L2CAP_CFG_OK) {
HIDD_TRACE_WARNING("%s: config failed, disconnecting", __func__);
hidd_conn_disconnect();
reason = HID_L2CAP_CFG_FAIL | (uint32_t)p_cfg->result;
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_CLOSE, reason, NULL);
return;
}
// update flags
if (cid == p_hcon->ctrl_cid) {
p_hcon->conn_flags |= HID_CONN_FLAGS_MY_CTRL_CFG_DONE;
if ((p_hcon->conn_flags & HID_CONN_FLAGS_IS_ORIG) &&
(p_hcon->conn_flags & HID_CONN_FLAGS_HIS_CTRL_CFG_DONE)) {
p_hcon->disc_reason = HID_L2CAP_CONN_FAIL;
if ((p_hcon->intr_cid =
L2CA_ConnectReq(HID_PSM_INTERRUPT, hd_cb.device.addr)) == 0) {
hidd_conn_disconnect();
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
HIDD_TRACE_WARNING("%s: could not start L2CAP connection for INTR",
__func__);
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_CLOSE,
HID_ERR_L2CAP_FAILED, NULL);
return;
} else {
p_hcon->conn_state = HID_CONN_STATE_CONNECTING_INTR;
}
}
} else {
p_hcon->conn_flags |= HID_CONN_FLAGS_MY_INTR_CFG_DONE;
}
hidd_check_config_done();
}
/*******************************************************************************
*
* Function hidd_l2cif_disconnect_ind
*
* Description Handler incoming L2CAP disconnection request
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_disconnect_ind(uint16_t cid, bool ack_needed) {
tHID_CONN* p_hcon;
HIDD_TRACE_EVENT("%s: cid=%04x ack_needed=%d", __func__, cid, ack_needed);
p_hcon = &hd_cb.device.conn;
if (p_hcon->conn_state == HID_CONN_STATE_UNUSED ||
(p_hcon->ctrl_cid != cid && p_hcon->intr_cid != cid)) {
HIDD_TRACE_WARNING("%s: unknown cid", __func__);
return;
}
if (ack_needed) L2CA_DisconnectRsp(cid);
p_hcon->conn_state = HID_CONN_STATE_DISCONNECTING;
if (cid == p_hcon->ctrl_cid)
p_hcon->ctrl_cid = 0;
else
p_hcon->intr_cid = 0;
if ((p_hcon->ctrl_cid == 0) && (p_hcon->intr_cid == 0)) {
HIDD_TRACE_EVENT("%s: INTR and CTRL disconnected", __func__);
// clean any outstanding data on intr
if (hd_cb.pending_data) {
osi_free(hd_cb.pending_data);
hd_cb.pending_data = NULL;
}
hd_cb.device.state = HIDD_DEV_NO_CONN;
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_CLOSE, p_hcon->disc_reason,
NULL);
}
}
/*******************************************************************************
*
* Function hidd_l2cif_disconnect_cfm
*
* Description Handles L2CAP disconection response
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_disconnect_cfm(uint16_t cid, uint16_t result) {
tHID_CONN* p_hcon;
HIDD_TRACE_EVENT("%s: cid=%04x result=%d", __func__, cid, result);
p_hcon = &hd_cb.device.conn;
if (p_hcon->conn_state == HID_CONN_STATE_UNUSED ||
(p_hcon->ctrl_cid != cid && p_hcon->intr_cid != cid)) {
HIDD_TRACE_WARNING("%s: unknown cid", __func__);
return;
}
if (cid == p_hcon->ctrl_cid) {
p_hcon->ctrl_cid = 0;
} else {
p_hcon->intr_cid = 0;
// now disconnect CTRL
L2CA_DisconnectReq(p_hcon->ctrl_cid);
}
if ((p_hcon->ctrl_cid == 0) && (p_hcon->intr_cid == 0)) {
HIDD_TRACE_EVENT("%s: INTR and CTRL disconnected", __func__);
hd_cb.device.state = HIDD_DEV_NO_CONN;
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
if (hd_cb.pending_vc_unplug) {
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_VC_UNPLUG,
p_hcon->disc_reason, NULL);
hd_cb.pending_vc_unplug = FALSE;
} else {
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_CLOSE,
p_hcon->disc_reason, NULL);
}
}
}
/*******************************************************************************
*
* Function hidd_l2cif_cong_ind
*
* Description Handles L2CAP congestion status event
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_cong_ind(uint16_t cid, bool congested) {
tHID_CONN* p_hcon;
HIDD_TRACE_EVENT("%s: cid=%04x congested=%d", __func__, cid, congested);
p_hcon = &hd_cb.device.conn;
if (p_hcon->conn_state == HID_CONN_STATE_UNUSED ||
(p_hcon->ctrl_cid != cid && p_hcon->intr_cid != cid)) {
HIDD_TRACE_WARNING("%s: unknown cid", __func__);
return;
}
if (congested) {
p_hcon->conn_flags |= HID_CONN_FLAGS_CONGESTED;
} else {
p_hcon->conn_flags &= ~HID_CONN_FLAGS_CONGESTED;
}
}
/*******************************************************************************
*
* Function hidd_l2cif_data_ind
*
* Description Handler incoming data on L2CAP channel
*
* Returns void
*
******************************************************************************/
static void hidd_l2cif_data_ind(uint16_t cid, BT_HDR* p_msg) {
tHID_CONN* p_hcon;
uint8_t* p_data = (uint8_t*)(p_msg + 1) + p_msg->offset;
uint8_t msg_type, param;
bool err = FALSE;
HIDD_TRACE_EVENT("%s: cid=%04x", __func__, cid);
if (p_msg->len < 1) {
HIDD_TRACE_ERROR("Invalid data length, ignore");
osi_free(p_msg);
return;
}
p_hcon = &hd_cb.device.conn;
if (p_hcon->conn_state == HID_CONN_STATE_UNUSED ||
(p_hcon->ctrl_cid != cid && p_hcon->intr_cid != cid)) {
HIDD_TRACE_WARNING("%s: unknown cid", __func__);
osi_free(p_msg);
return;
}
msg_type = HID_GET_TRANS_FROM_HDR(*p_data);
param = HID_GET_PARAM_FROM_HDR(*p_data);
if (msg_type == HID_TRANS_DATA && cid == p_hcon->intr_cid) {
// skip HID header
p_msg->offset++;
p_msg->len--;
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_INTR_DATA, 0, p_msg);
return;
}
switch (msg_type) {
case HID_TRANS_GET_REPORT:
// at this stage we don't know if Report Id shall be included in request
// so we pass complete packet in callback and let other code analyze this
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_GET_REPORT,
!!(param & HID_PAR_GET_REP_BUFSIZE_FOLLOWS), p_msg);
break;
case HID_TRANS_SET_REPORT:
// as above
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_SET_REPORT, 0, p_msg);
break;
case HID_TRANS_GET_IDLE:
hidd_conn_send_data(HID_CHANNEL_CTRL, HID_TRANS_DATA,
HID_PAR_REP_TYPE_OTHER, hd_cb.device.idle_time, 0,
NULL);
osi_free(p_msg);
break;
case HID_TRANS_SET_IDLE:
if (p_msg->len != 2) {
HIDD_TRACE_ERROR("%s: invalid len (%d) set idle request received",
__func__, p_msg->len);
err = TRUE;
} else {
hd_cb.device.idle_time = p_data[1];
HIDD_TRACE_DEBUG("%s: idle_time = %d", __func__,
hd_cb.device.idle_time);
if (hd_cb.device.idle_time) {
HIDD_TRACE_WARNING(
"%s: idle_time of %d ms not supported by HID Device", __func__,
(hd_cb.device.idle_time * 4));
err = TRUE;
}
}
if (!err) {
hidd_conn_send_data(0, HID_TRANS_HANDSHAKE,
HID_PAR_HANDSHAKE_RSP_SUCCESS, 0, 0, NULL);
} else {
hidd_conn_send_data(0, HID_TRANS_HANDSHAKE,
HID_PAR_HANDSHAKE_RSP_ERR_INVALID_PARAM, 0, 0,
NULL);
}
osi_free(p_msg);
break;
case HID_TRANS_GET_PROTOCOL:
hidd_conn_send_data(HID_CHANNEL_CTRL, HID_TRANS_DATA,
HID_PAR_REP_TYPE_OTHER, !hd_cb.device.boot_mode, 0,
NULL);
osi_free(p_msg);
break;
case HID_TRANS_SET_PROTOCOL:
hd_cb.device.boot_mode = !(param & HID_PAR_PROTOCOL_MASK);
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_SET_PROTOCOL,
param & HID_PAR_PROTOCOL_MASK, NULL);
hidd_conn_send_data(0, HID_TRANS_HANDSHAKE, HID_PAR_HANDSHAKE_RSP_SUCCESS,
0, 0, NULL);
osi_free(p_msg);
break;
case HID_TRANS_CONTROL:
switch (param) {
case HID_PAR_CONTROL_SUSPEND:
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_SUSPEND, 0, NULL);
break;
case HID_PAR_CONTROL_EXIT_SUSPEND:
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_EXIT_SUSPEND, 0,
NULL);
break;
case HID_PAR_CONTROL_VIRTUAL_CABLE_UNPLUG:
hidd_conn_disconnect();
// set flag so we can notify properly when disconnected
hd_cb.pending_vc_unplug = TRUE;
break;
}
osi_free(p_msg);
break;
case HID_TRANS_DATA:
default:
HIDD_TRACE_WARNING("%s: got unsupported msg (%d)", __func__, msg_type);
hidd_conn_send_data(0, HID_TRANS_HANDSHAKE,
HID_PAR_HANDSHAKE_RSP_ERR_UNSUPPORTED_REQ, 0, 0,
NULL);
osi_free(p_msg);
break;
}
}
/*******************************************************************************
*
* Function hidd_conn_reg
*
* Description Registers L2CAP channels
*
* Returns void
*
******************************************************************************/
tHID_STATUS hidd_conn_reg(void) {
HIDD_TRACE_API("%s", __func__);
memset(&hd_cb.l2cap_cfg, 0, sizeof(tL2CAP_CFG_INFO));
hd_cb.l2cap_cfg.mtu_present = TRUE;
hd_cb.l2cap_cfg.mtu = HID_DEV_MTU_SIZE;
hd_cb.l2cap_cfg.flush_to_present = TRUE;
hd_cb.l2cap_cfg.flush_to = HID_DEV_FLUSH_TO;
memset(&hd_cb.l2cap_intr_cfg, 0, sizeof(tL2CAP_CFG_INFO));
hd_cb.l2cap_intr_cfg.mtu_present = TRUE;
hd_cb.l2cap_intr_cfg.mtu = HID_DEV_MTU_SIZE;
hd_cb.l2cap_intr_cfg.flush_to_present = TRUE;
hd_cb.l2cap_intr_cfg.flush_to = HID_DEV_FLUSH_TO;
if (!L2CA_Register(HID_PSM_CONTROL, (tL2CAP_APPL_INFO*)&dev_reg_info,
false /* enable_snoop */)) {
HIDD_TRACE_ERROR("HID Control (device) registration failed");
return (HID_ERR_L2CAP_FAILED);
}
if (!L2CA_Register(HID_PSM_INTERRUPT, (tL2CAP_APPL_INFO*)&dev_reg_info,
false /* enable_snoop */)) {
L2CA_Deregister(HID_PSM_CONTROL);
HIDD_TRACE_ERROR("HID Interrupt (device) registration failed");
return (HID_ERR_L2CAP_FAILED);
}
return (HID_SUCCESS);
}
/*******************************************************************************
*
* Function hidd_conn_dereg
*
* Description Deregisters L2CAP channels
*
* Returns void
*
******************************************************************************/
void hidd_conn_dereg(void) {
HIDD_TRACE_API("%s", __func__);
L2CA_Deregister(HID_PSM_CONTROL);
L2CA_Deregister(HID_PSM_INTERRUPT);
}
/*******************************************************************************
*
* Function hidd_conn_initiate
*
* Description Initiates HID connection to plugged device
*
* Returns HID_SUCCESS
*
******************************************************************************/
tHID_STATUS hidd_conn_initiate(void) {
tHID_DEV_DEV_CTB* p_dev = &hd_cb.device;
HIDD_TRACE_API("%s", __func__);
if (!p_dev->in_use) {
HIDD_TRACE_WARNING("%s: no virtual cable established", __func__);
return (HID_ERR_NOT_REGISTERED);
}
if (p_dev->conn.conn_state != HID_CONN_STATE_UNUSED) {
HIDD_TRACE_WARNING("%s: connection already in progress", __func__);
return (HID_ERR_CONN_IN_PROCESS);
}
p_dev->conn.ctrl_cid = 0;
p_dev->conn.intr_cid = 0;
p_dev->conn.disc_reason = HID_L2CAP_CONN_FAIL;
p_dev->conn.conn_flags = HID_CONN_FLAGS_IS_ORIG;
BTM_SetOutService(p_dev->addr, BTM_SEC_SERVICE_HIDD_SEC_CTRL, HIDD_SEC_CHN);
/* Check if L2CAP started the connection process */
if ((p_dev->conn.ctrl_cid = L2CA_ConnectReq(HID_PSM_CONTROL, p_dev->addr)) ==
0) {
HIDD_TRACE_WARNING("%s: could not start L2CAP connection", __func__);
hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_CLOSE, HID_ERR_L2CAP_FAILED,
NULL);
} else {
p_dev->conn.conn_state = HID_CONN_STATE_CONNECTING_CTRL;
}
return (HID_SUCCESS);
}
/*******************************************************************************
*
* Function hidd_conn_disconnect
*
* Description Disconnects existing HID connection
*
* Returns HID_SUCCESS
*
******************************************************************************/
tHID_STATUS hidd_conn_disconnect(void) {
tHID_CONN* p_hcon;
HIDD_TRACE_API("%s", __func__);
// clean any outstanding data on intr
if (hd_cb.pending_data) {
osi_free(hd_cb.pending_data);
hd_cb.pending_data = NULL;
}
p_hcon = &hd_cb.device.conn;
if ((p_hcon->ctrl_cid != 0) || (p_hcon->intr_cid != 0)) {
p_hcon->conn_state = HID_CONN_STATE_DISCONNECTING;
/* Set l2cap idle timeout to 0 (so ACL link is disconnected
* immediately after last channel is closed) */
L2CA_SetIdleTimeoutByBdAddr(hd_cb.device.addr, 0, BT_TRANSPORT_BR_EDR);
if (p_hcon->intr_cid) {
L2CA_DisconnectReq(p_hcon->intr_cid);
} else if (p_hcon->ctrl_cid) {
L2CA_DisconnectReq(p_hcon->ctrl_cid);
}
} else {
HIDD_TRACE_WARNING("%s: already disconnected", __func__);
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
}
return (HID_SUCCESS);
}
/*******************************************************************************
*
* Function hidd_conn_send_data
*
* Description Sends data to host
*
* Returns tHID_STATUS
*
******************************************************************************/
tHID_STATUS hidd_conn_send_data(uint8_t channel, uint8_t msg_type,
uint8_t param, uint8_t data, uint16_t len,
uint8_t* p_data) {
tHID_CONN* p_hcon;
BT_HDR* p_buf;
uint8_t* p_out;
uint16_t cid;
uint16_t buf_size;
HIDD_TRACE_VERBOSE("%s: channel(%d), msg_type(%d), len(%d)", __func__,
channel, msg_type, len);
p_hcon = &hd_cb.device.conn;
if (p_hcon->conn_flags & HID_CONN_FLAGS_CONGESTED) {
return HID_ERR_CONGESTED;
}
switch (msg_type) {
case HID_TRANS_HANDSHAKE:
case HID_TRANS_CONTROL:
cid = p_hcon->ctrl_cid;
buf_size = HID_CONTROL_BUF_SIZE;
break;
case HID_TRANS_DATA:
if (channel == HID_CHANNEL_CTRL) {
cid = p_hcon->ctrl_cid;
buf_size = HID_CONTROL_BUF_SIZE;
} else {
cid = p_hcon->intr_cid;
buf_size = HID_INTERRUPT_BUF_SIZE;
}
break;
default:
return (HID_ERR_INVALID_PARAM);
}
p_buf = (BT_HDR*)osi_malloc(buf_size);
if (p_buf == NULL) return (HID_ERR_NO_RESOURCES);
p_buf->offset = L2CAP_MIN_OFFSET;
p_out = (uint8_t*)(p_buf + 1) + p_buf->offset;
*p_out = HID_BUILD_HDR(msg_type, param);
p_out++;
p_buf->len = 1; // start with header only
// add report id prefix only if non-zero (which is reserved)
if (msg_type == HID_TRANS_DATA && (data || param == HID_PAR_REP_TYPE_OTHER)) {
*p_out = data; // report_id
p_out++;
p_buf->len++;
}
if (len > 0 && p_data != NULL) {
memcpy(p_out, p_data, len);
p_buf->len += len;
}
// check if connected
if (hd_cb.device.state != HIDD_DEV_CONNECTED) {
// for DATA on intr we hold transfer and try to reconnect
if (msg_type == HID_TRANS_DATA && cid == p_hcon->intr_cid) {
// drop previous data, we do not queue it for now
if (hd_cb.pending_data) {
osi_free(hd_cb.pending_data);
}
hd_cb.pending_data = p_buf;
if (hd_cb.device.conn.conn_state == HID_CONN_STATE_UNUSED) {
hidd_conn_initiate();
}
return HID_SUCCESS;
}
return HID_ERR_NO_CONNECTION;
}
#ifdef REPORT_TRANSFER_TIMESTAMP
if (report_transfer) {
HIDD_TRACE_ERROR("%s: report sent", __func__);
}
#endif
HIDD_TRACE_VERBOSE("%s: report sent", __func__);
if (!L2CA_DataWrite(cid, p_buf)) return (HID_ERR_CONGESTED);
return (HID_SUCCESS);
}