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PL286/system/bt/stack/hid/hidh_conn.cc

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/******************************************************************************
*
* Copyright (C) 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_common.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 "hidh_api.h"
#include "hidh_int.h"
#include "log/log.h"
#include "osi/include/osi.h"
static uint8_t find_conn_by_cid(uint16_t cid);
static void hidh_conn_retry(uint8_t dhandle);
/******************************************************************************/
/* L O C A L F U N C T I O N P R O T O T Y P E S */
/******************************************************************************/
static void hidh_l2cif_connect_ind(const RawAddress& bd_addr,
uint16_t l2cap_cid, uint16_t psm,
uint8_t l2cap_id);
static void hidh_l2cif_connect_cfm(uint16_t l2cap_cid, uint16_t result);
static void hidh_l2cif_config_ind(uint16_t l2cap_cid, tL2CAP_CFG_INFO* p_cfg);
static void hidh_l2cif_config_cfm(uint16_t l2cap_cid, tL2CAP_CFG_INFO* p_cfg);
static void hidh_l2cif_disconnect_ind(uint16_t l2cap_cid, bool ack_needed);
static void hidh_l2cif_data_ind(uint16_t l2cap_cid, BT_HDR* p_msg);
static void hidh_l2cif_disconnect_cfm(uint16_t l2cap_cid, uint16_t result);
static void hidh_l2cif_cong_ind(uint16_t l2cap_cid, bool congested);
static const tL2CAP_APPL_INFO hst_reg_info = {
hidh_l2cif_connect_ind,
hidh_l2cif_connect_cfm,
NULL,
hidh_l2cif_config_ind,
hidh_l2cif_config_cfm,
hidh_l2cif_disconnect_ind,
hidh_l2cif_disconnect_cfm,
NULL,
hidh_l2cif_data_ind,
hidh_l2cif_cong_ind,
NULL /* tL2CA_TX_COMPLETE_CB */
};
/*******************************************************************************
*
* Function hidh_l2cif_reg
*
* Description This function initializes the SDP unit.
*
* Returns void
*
******************************************************************************/
tHID_STATUS hidh_conn_reg(void) {
int xx;
/* Initialize the L2CAP configuration. We only care about MTU and flush */
memset(&hh_cb.l2cap_cfg, 0, sizeof(tL2CAP_CFG_INFO));
hh_cb.l2cap_cfg.mtu_present = true;
hh_cb.l2cap_cfg.mtu = HID_HOST_MTU;
hh_cb.l2cap_cfg.flush_to_present = true;
hh_cb.l2cap_cfg.flush_to = HID_HOST_FLUSH_TO;
/* Now, register with L2CAP */
if (!L2CA_Register(HID_PSM_CONTROL, (tL2CAP_APPL_INFO*)&hst_reg_info)) {
HIDH_TRACE_ERROR("HID-Host Control Registration failed");
return (HID_ERR_L2CAP_FAILED);
}
if (!L2CA_Register(HID_PSM_INTERRUPT, (tL2CAP_APPL_INFO*)&hst_reg_info)) {
L2CA_Deregister(HID_PSM_CONTROL);
HIDH_TRACE_ERROR("HID-Host Interrupt Registration failed");
return (HID_ERR_L2CAP_FAILED);
}
for (xx = 0; xx < HID_HOST_MAX_DEVICES; xx++) {
hh_cb.devices[xx].in_use = false;
hh_cb.devices[xx].conn.conn_state = HID_CONN_STATE_UNUSED;
}
return (HID_SUCCESS);
}
/*******************************************************************************
*
* Function hidh_conn_disconnect
*
* Description This function disconnects a connection.
*
* Returns true if disconnect started, false if already disconnected
*
******************************************************************************/
tHID_STATUS hidh_conn_disconnect(uint8_t dhandle) {
tHID_CONN* p_hcon = &hh_cb.devices[dhandle].conn;
HIDH_TRACE_EVENT("HID-Host disconnect");
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(hh_cb.devices[dhandle].addr, 0,
BT_TRANSPORT_BR_EDR);
/* Disconnect both interrupt and control channels */
if (p_hcon->intr_cid)
L2CA_DisconnectReq(p_hcon->intr_cid);
else if (p_hcon->ctrl_cid)
L2CA_DisconnectReq(p_hcon->ctrl_cid);
} else {
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
}
return (HID_SUCCESS);
}
/*******************************************************************************
*
* 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.
*
******************************************************************************/
void hidh_sec_check_complete_term(UNUSED_ATTR const RawAddress* bd_addr,
UNUSED_ATTR tBT_TRANSPORT transport,
void* p_ref_data, uint8_t res) {
tHID_HOST_DEV_CTB* p_dev = (tHID_HOST_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; /* Authentication passed. Reset
disc_reason (from
HID_ERR_AUTH_FAILED) */
p_dev->conn.conn_state = HID_CONN_STATE_CONNECTING_INTR;
/* Send response to the L2CAP layer. */
L2CA_ConnectRsp(p_dev->addr, p_dev->conn.ctrl_id, p_dev->conn.ctrl_cid,
L2CAP_CONN_OK, L2CAP_CONN_OK);
/* Send a Configuration Request. */
L2CA_ConfigReq(p_dev->conn.ctrl_cid, &hh_cb.l2cap_cfg);
}
/* security check fail */
else if (res != BTM_SUCCESS) {
p_dev->conn.disc_reason =
HID_ERR_AUTH_FAILED; /* Save reason for disconnecting */
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);
}
}
/*******************************************************************************
*
* Function hidh_l2cif_connect_ind
*
* Description This function handles an inbound connection indication
* from L2CAP. This is the case where we are acting as a
* server.
*
* Returns void
*
******************************************************************************/
static void hidh_l2cif_connect_ind(const RawAddress& bd_addr,
uint16_t l2cap_cid, uint16_t psm,
uint8_t l2cap_id) {
tHID_CONN* p_hcon;
bool bAccept = true;
uint8_t i = HID_HOST_MAX_DEVICES;
tHID_HOST_DEV_CTB* p_dev;
HIDH_TRACE_EVENT("HID-Host Rcvd L2CAP conn ind, PSM: 0x%04x CID 0x%x", psm,
l2cap_cid);
/* always add incoming connection device into HID database by default */
if (HID_HostAddDev(bd_addr, HID_SEC_REQUIRED, &i) != HID_SUCCESS) {
L2CA_ConnectRsp(bd_addr, l2cap_id, l2cap_cid, L2CAP_CONN_SECURITY_BLOCK, 0);
return;
}
p_hcon = &hh_cb.devices[i].conn;
p_dev = &hh_cb.devices[i];
/* Check we are in the correct state for this */
if (psm == HID_PSM_INTERRUPT) {
if (p_hcon->ctrl_cid == 0) {
HIDH_TRACE_WARNING(
"HID-Host Rcvd INTR L2CAP conn ind, but no CTL channel");
bAccept = false;
}
if (p_hcon->conn_state != HID_CONN_STATE_CONNECTING_INTR) {
HIDH_TRACE_WARNING("HID-Host Rcvd INTR L2CAP conn ind, wrong state: %d",
p_hcon->conn_state);
bAccept = false;
}
} else /* CTRL channel */
{
/**M: Open Macro for accept hid connection @{*/
/*#if defined(HID_HOST_ACPT_NEW_CONN)*/
#if defined(HID_HOST_ACPT_NEW_CONN) && (HID_HOST_ACPT_NEW_CONN == TRUE)
/**@}*/
p_hcon->ctrl_cid = p_hcon->intr_cid = 0;
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
#else
if (p_hcon->conn_state != HID_CONN_STATE_UNUSED) {
HIDH_TRACE_WARNING("HID-Host - Rcvd CTL L2CAP conn ind, wrong state: %d",
p_hcon->conn_state);
bAccept = false;
}
#endif
}
if (!bAccept) {
L2CA_ConnectRsp(bd_addr, l2cap_id, l2cap_cid, L2CAP_CONN_NO_RESOURCES, 0);
return;
}
if (psm == HID_PSM_CONTROL) {
p_hcon->conn_flags = 0;
p_hcon->ctrl_cid = l2cap_cid;
p_hcon->ctrl_id = l2cap_id;
p_hcon->disc_reason = HID_L2CAP_CONN_FAIL; /* In case disconnection occurs
before security is completed,
then set CLOSE_EVT reason code
to 'connection failure' */
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,
(p_dev->attr_mask & HID_SEC_REQUIRED) ? HID_SEC_CHN : HID_NOSEC_CHN,
&hidh_sec_check_complete_term, p_dev) == BTM_CMD_STARTED) {
L2CA_ConnectRsp(bd_addr, l2cap_id, l2cap_cid, L2CAP_CONN_PENDING,
L2CAP_CONN_OK);
}
return;
}
/* Transition to the next appropriate state, configuration */
p_hcon->conn_state = HID_CONN_STATE_CONFIG;
p_hcon->intr_cid = l2cap_cid;
/* Send response to the L2CAP layer. */
L2CA_ConnectRsp(bd_addr, l2cap_id, l2cap_cid, L2CAP_CONN_OK, L2CAP_CONN_OK);
/* Send a Configuration Request. */
L2CA_ConfigReq(l2cap_cid, &hh_cb.l2cap_cfg);
HIDH_TRACE_EVENT(
"HID-Host Rcvd L2CAP conn ind, sent config req, PSM: 0x%04x CID 0x%x",
psm, l2cap_cid);
}
void hidh_process_repage_timer_timeout(void* data) {
uint8_t dhandle = PTR_TO_UINT(data);
hidh_try_repage(dhandle);
}
/*******************************************************************************
*
* Function hidh_try_repage
*
* Description This function processes timeout (to page device).
*
* Returns void
*
******************************************************************************/
void hidh_try_repage(uint8_t dhandle) {
tHID_HOST_DEV_CTB* device;
hidh_conn_initiate(dhandle);
device = &hh_cb.devices[dhandle];
device->conn_tries++;
hh_cb.callback(dhandle, device->addr, HID_HDEV_EVT_RETRYING,
device->conn_tries, NULL);
}
/*******************************************************************************
*
* Function hidh_sec_check_complete_orig
*
* Description This function checks to see if security procedures are being
* carried out or not..
*
* Returns void
*
******************************************************************************/
void hidh_sec_check_complete_orig(UNUSED_ATTR const RawAddress* bd_addr,
UNUSED_ATTR tBT_TRANSPORT transport,
void* p_ref_data, uint8_t res) {
tHID_HOST_DEV_CTB* p_dev = (tHID_HOST_DEV_CTB*)p_ref_data;
uint8_t dhandle;
// TODO(armansito): This kind of math to determine a device handle is way
// too dirty and unnecessary. Why can't |p_dev| store it's handle?
dhandle = (PTR_TO_UINT(p_dev) - PTR_TO_UINT(&(hh_cb.devices[0]))) /
sizeof(tHID_HOST_DEV_CTB);
if (res == BTM_SUCCESS && p_dev->conn.conn_state == HID_CONN_STATE_SECURITY) {
HIDH_TRACE_EVENT("HID-Host Originator security pass.");
p_dev->conn.disc_reason = HID_SUCCESS; /* Authentication passed. Reset
disc_reason (from
HID_ERR_AUTH_FAILED) */
/* Transition to the next appropriate state, configuration */
p_dev->conn.conn_state = HID_CONN_STATE_CONFIG;
L2CA_ConfigReq(p_dev->conn.ctrl_cid, &hh_cb.l2cap_cfg);
HIDH_TRACE_EVENT("HID-Host Got Control conn cnf, sent cfg req, CID: 0x%x",
p_dev->conn.ctrl_cid);
}
if (res != BTM_SUCCESS && p_dev->conn.conn_state == HID_CONN_STATE_SECURITY) {
#if (HID_HOST_MAX_CONN_RETRY > 0)
if (res == BTM_DEVICE_TIMEOUT) {
if (p_dev->conn_tries <= HID_HOST_MAX_CONN_RETRY) {
hidh_conn_retry(dhandle);
return;
}
}
#endif
p_dev->conn.disc_reason =
HID_ERR_AUTH_FAILED; /* Save reason for disconnecting */
hidh_conn_disconnect(dhandle);
}
}
/*******************************************************************************
*
* Function hidh_l2cif_connect_cfm
*
* Description This function handles the connect confirm events
* from L2CAP. This is the case when we are acting as a
* client and have sent a connect request.
*
* Returns void
*
******************************************************************************/
static void hidh_l2cif_connect_cfm(uint16_t l2cap_cid, uint16_t result) {
uint8_t dhandle;
tHID_CONN* p_hcon = NULL;
uint32_t reason;
tHID_HOST_DEV_CTB* p_dev = NULL;
/* Find CCB based on CID, and verify we are in a state to accept this message
*/
dhandle = find_conn_by_cid(l2cap_cid);
if (dhandle < HID_HOST_MAX_DEVICES) {
p_dev = &hh_cb.devices[dhandle];
p_hcon = &hh_cb.devices[dhandle].conn;
}
if ((p_hcon == NULL) || (!(p_hcon->conn_flags & HID_CONN_FLAGS_IS_ORIG)) ||
((l2cap_cid == p_hcon->ctrl_cid) &&
(p_hcon->conn_state != HID_CONN_STATE_CONNECTING_CTRL)) ||
((l2cap_cid == p_hcon->intr_cid) &&
(p_hcon->conn_state != HID_CONN_STATE_CONNECTING_INTR) &&
(p_hcon->conn_state != HID_CONN_STATE_DISCONNECTING))) {
HIDH_TRACE_WARNING("HID-Host Rcvd unexpected conn cnf, CID 0x%x ",
l2cap_cid);
return;
}
if (result != L2CAP_CONN_OK) {
if (l2cap_cid == p_hcon->ctrl_cid)
p_hcon->ctrl_cid = 0;
else
p_hcon->intr_cid = 0;
hidh_conn_disconnect(dhandle);
#if (HID_HOST_MAX_CONN_RETRY > 0)
if ((hh_cb.devices[dhandle].conn_tries <= HID_HOST_MAX_CONN_RETRY) &&
(result == HCI_ERR_CONNECTION_TOUT || result == HCI_ERR_UNSPECIFIED ||
result == HCI_ERR_PAGE_TIMEOUT)) {
hidh_conn_retry(dhandle);
} else
#endif
{
reason = HID_L2CAP_CONN_FAIL | (uint32_t)result;
hh_cb.callback(dhandle, hh_cb.devices[dhandle].addr, HID_HDEV_EVT_CLOSE,
reason, NULL);
}
return;
}
/* receive Control Channel connect confirmation */
if (l2cap_cid == p_hcon->ctrl_cid) {
/* check security requirement */
p_hcon->conn_state = HID_CONN_STATE_SECURITY;
p_hcon->disc_reason = HID_L2CAP_CONN_FAIL; /* In case disconnection occurs
before security is completed,
then set CLOSE_EVT reason code
to "connection failure" */
btm_sec_mx_access_request(
p_dev->addr, HID_PSM_CONTROL, true, BTM_SEC_PROTO_HID,
(p_dev->attr_mask & HID_SEC_REQUIRED) ? HID_SEC_CHN : HID_NOSEC_CHN,
&hidh_sec_check_complete_orig, p_dev);
} else {
p_hcon->conn_state = HID_CONN_STATE_CONFIG;
/* Send a Configuration Request. */
L2CA_ConfigReq(l2cap_cid, &hh_cb.l2cap_cfg);
HIDH_TRACE_EVENT("HID-Host got Interrupt conn cnf, sent cfg req, CID: 0x%x",
l2cap_cid);
}
return;
}
/*******************************************************************************
*
* Function hidh_l2cif_config_ind
*
* Description This function processes the L2CAP configuration indication
* event.
*
* Returns void
*
******************************************************************************/
static void hidh_l2cif_config_ind(uint16_t l2cap_cid, tL2CAP_CFG_INFO* p_cfg) {
uint8_t dhandle;
tHID_CONN* p_hcon = NULL;
uint32_t reason;
/* Find CCB based on CID */
dhandle = find_conn_by_cid(l2cap_cid);
if (dhandle < HID_HOST_MAX_DEVICES) {
p_hcon = &hh_cb.devices[dhandle].conn;
}
if (p_hcon == NULL) {
HIDH_TRACE_WARNING("HID-Host Rcvd L2CAP cfg ind, unknown CID: 0x%x",
l2cap_cid);
return;
}
HIDH_TRACE_EVENT("HID-Host Rcvd cfg ind, sent cfg cfm, CID: 0x%x", l2cap_cid);
/* Remember the remote MTU size */
if ((!p_cfg->mtu_present) || (p_cfg->mtu > HID_HOST_MTU))
p_hcon->rem_mtu_size = HID_HOST_MTU;
else
p_hcon->rem_mtu_size = p_cfg->mtu;
/* For now, always accept configuration from the other side */
p_cfg->flush_to_present = false;
p_cfg->mtu_present = false;
p_cfg->result = L2CAP_CFG_OK;
L2CA_ConfigRsp(l2cap_cid, p_cfg);
if (l2cap_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)) {
/* Connect interrupt channel */
p_hcon->disc_reason = HID_L2CAP_CONN_FAIL; /* Reset initial reason for
CLOSE_EVT: Connection
Attempt was made but failed
*/
p_hcon->intr_cid =
L2CA_ConnectReq(HID_PSM_INTERRUPT, hh_cb.devices[dhandle].addr);
if (p_hcon->intr_cid == 0) {
HIDH_TRACE_WARNING("HID-Host INTR Originate failed");
reason = HID_L2CAP_REQ_FAIL;
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
hidh_conn_disconnect(dhandle);
hh_cb.callback(dhandle, hh_cb.devices[dhandle].addr, HID_HDEV_EVT_CLOSE,
reason, NULL);
return;
} else {
/* Transition to the next appropriate state, waiting for connection
* confirm on interrupt channel. */
p_hcon->conn_state = HID_CONN_STATE_CONNECTING_INTR;
}
}
} else
p_hcon->conn_flags |= HID_CONN_FLAGS_HIS_INTR_CFG_DONE;
/* If all configuration is complete, change state and tell management we are
* up */
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;
/* Reset disconnect reason to success, as connection successful */
p_hcon->disc_reason = HID_SUCCESS;
hh_cb.devices[dhandle].state = HID_DEV_CONNECTED;
hh_cb.callback(dhandle, hh_cb.devices[dhandle].addr, HID_HDEV_EVT_OPEN, 0,
NULL);
}
}
/*******************************************************************************
*
* Function hidh_l2cif_config_cfm
*
* Description This function processes the L2CAP configuration confirmation
* event.
*
* Returns void
*
******************************************************************************/
static void hidh_l2cif_config_cfm(uint16_t l2cap_cid, tL2CAP_CFG_INFO* p_cfg) {
uint8_t dhandle;
tHID_CONN* p_hcon = NULL;
uint32_t reason;
HIDH_TRACE_EVENT("HID-Host Rcvd cfg cfm, CID: 0x%x Result: %d", l2cap_cid,
p_cfg->result);
/* Find CCB based on CID */
dhandle = find_conn_by_cid(l2cap_cid);
if (dhandle < HID_HOST_MAX_DEVICES) p_hcon = &hh_cb.devices[dhandle].conn;
if (p_hcon == NULL) {
HIDH_TRACE_WARNING("HID-Host Rcvd L2CAP cfg ind, unknown CID: 0x%x",
l2cap_cid);
return;
}
/* If configuration failed, disconnect the channel(s) */
if (p_cfg->result != L2CAP_CFG_OK) {
hidh_conn_disconnect(dhandle);
reason = HID_L2CAP_CFG_FAIL | (uint32_t)p_cfg->result;
hh_cb.callback(dhandle, hh_cb.devices[dhandle].addr, HID_HDEV_EVT_CLOSE,
reason, NULL);
return;
}
if (l2cap_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)) {
/* Connect interrupt channel */
p_hcon->disc_reason = HID_L2CAP_CONN_FAIL; /* Reset initial reason for
CLOSE_EVT: Connection
Attempt was made but failed
*/
p_hcon->intr_cid =
L2CA_ConnectReq(HID_PSM_INTERRUPT, hh_cb.devices[dhandle].addr);
if (p_hcon->intr_cid == 0) {
HIDH_TRACE_WARNING("HID-Host INTR Originate failed");
reason = HID_L2CAP_REQ_FAIL;
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
hidh_conn_disconnect(dhandle);
hh_cb.callback(dhandle, hh_cb.devices[dhandle].addr, HID_HDEV_EVT_CLOSE,
reason, NULL);
return;
} else {
/* Transition to the next appropriate state, waiting for connection
* confirm on interrupt channel. */
p_hcon->conn_state = HID_CONN_STATE_CONNECTING_INTR;
}
}
} else
p_hcon->conn_flags |= HID_CONN_FLAGS_MY_INTR_CFG_DONE;
/* If all configuration is complete, change state and tell management we are
* up */
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;
/* Reset disconnect reason to success, as connection successful */
p_hcon->disc_reason = HID_SUCCESS;
hh_cb.devices[dhandle].state = HID_DEV_CONNECTED;
hh_cb.callback(dhandle, hh_cb.devices[dhandle].addr, HID_HDEV_EVT_OPEN, 0,
NULL);
}
}
/*******************************************************************************
*
* Function hidh_l2cif_disconnect_ind
*
* Description This function handles a disconnect event from L2CAP. If
* requested to, we ack the disconnect before dropping the CCB
*
* Returns void
*
******************************************************************************/
static void hidh_l2cif_disconnect_ind(uint16_t l2cap_cid, bool ack_needed) {
uint8_t dhandle;
tHID_CONN* p_hcon = NULL;
uint16_t disc_res = HCI_SUCCESS;
uint16_t hid_close_evt_reason;
/* Find CCB based on CID */
dhandle = find_conn_by_cid(l2cap_cid);
if (dhandle < HID_HOST_MAX_DEVICES) p_hcon = &hh_cb.devices[dhandle].conn;
if (p_hcon == NULL) {
HIDH_TRACE_WARNING("HID-Host Rcvd L2CAP disc, unknown CID: 0x%x",
l2cap_cid);
return;
}
if (ack_needed) L2CA_DisconnectRsp(l2cap_cid);
HIDH_TRACE_EVENT("HID-Host Rcvd L2CAP disc, CID: 0x%x", l2cap_cid);
p_hcon->conn_state = HID_CONN_STATE_DISCONNECTING;
if (l2cap_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)) {
hh_cb.devices[dhandle].state = HID_DEV_NO_CONN;
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
if (!ack_needed) disc_res = btm_get_acl_disc_reason_code();
#if (HID_HOST_MAX_CONN_RETRY > 0)
if ((disc_res == HCI_ERR_CONNECTION_TOUT ||
disc_res == HCI_ERR_UNSPECIFIED) &&
(!(hh_cb.devices[dhandle].attr_mask & HID_RECONN_INIT)) &&
(hh_cb.devices[dhandle].attr_mask & HID_NORMALLY_CONNECTABLE)) {
hh_cb.devices[dhandle].conn_tries = 0;
period_ms_t interval_ms = HID_HOST_REPAGE_WIN * 1000;
alarm_set_on_mloop(hh_cb.devices[dhandle].conn.process_repage_timer,
interval_ms, hidh_process_repage_timer_timeout,
UINT_TO_PTR(dhandle));
hh_cb.callback(dhandle, hh_cb.devices[dhandle].addr, HID_HDEV_EVT_CLOSE,
disc_res, NULL);
} else
#endif
{
/* Set reason code for HID_HDEV_EVT_CLOSE */
hid_close_evt_reason = p_hcon->disc_reason;
/* If we got baseband sent HCI_DISCONNECT_COMPLETE_EVT due to security
* failure, then set reason to HID_ERR_AUTH_FAILED */
if ((disc_res == HCI_ERR_AUTH_FAILURE) ||
(disc_res == HCI_ERR_KEY_MISSING) ||
(disc_res == HCI_ERR_HOST_REJECT_SECURITY) ||
(disc_res == HCI_ERR_PAIRING_NOT_ALLOWED) ||
(disc_res == HCI_ERR_UNIT_KEY_USED) ||
(disc_res == HCI_ERR_PAIRING_WITH_UNIT_KEY_NOT_SUPPORTED) ||
(disc_res == HCI_ERR_ENCRY_MODE_NOT_ACCEPTABLE) ||
(disc_res == HCI_ERR_REPEATED_ATTEMPTS)) {
hid_close_evt_reason = HID_ERR_AUTH_FAILED;
}
hh_cb.callback(dhandle, hh_cb.devices[dhandle].addr, HID_HDEV_EVT_CLOSE,
hid_close_evt_reason, NULL);
}
}
}
/*******************************************************************************
*
* Function hidh_l2cif_disconnect_cfm
*
* Description This function handles a disconnect confirm event from L2CAP.
*
* Returns void
*
******************************************************************************/
static void hidh_l2cif_disconnect_cfm(uint16_t l2cap_cid,
UNUSED_ATTR uint16_t result) {
uint8_t dhandle;
tHID_CONN* p_hcon = NULL;
/* Find CCB based on CID */
dhandle = find_conn_by_cid(l2cap_cid);
if (dhandle < HID_HOST_MAX_DEVICES) p_hcon = &hh_cb.devices[dhandle].conn;
if (p_hcon == NULL) {
HIDH_TRACE_WARNING("HID-Host Rcvd L2CAP disc cfm, unknown CID: 0x%x",
l2cap_cid);
return;
}
HIDH_TRACE_EVENT("HID-Host Rcvd L2CAP disc cfm, CID: 0x%x", l2cap_cid);
if (l2cap_cid == p_hcon->ctrl_cid)
p_hcon->ctrl_cid = 0;
else {
p_hcon->intr_cid = 0;
if (p_hcon->ctrl_cid) {
HIDH_TRACE_EVENT("HID-Host Initiating L2CAP Ctrl disconnection");
L2CA_DisconnectReq(p_hcon->ctrl_cid);
}
}
if ((p_hcon->ctrl_cid == 0) && (p_hcon->intr_cid == 0)) {
hh_cb.devices[dhandle].state = HID_DEV_NO_CONN;
p_hcon->conn_state = HID_CONN_STATE_UNUSED;
hh_cb.callback(dhandle, hh_cb.devices[dhandle].addr, HID_HDEV_EVT_CLOSE,
p_hcon->disc_reason, NULL);
}
}
/*******************************************************************************
*
* Function hidh_l2cif_cong_ind
*
* Description This function handles a congestion status event from L2CAP.
*
* Returns void
*
******************************************************************************/
static void hidh_l2cif_cong_ind(uint16_t l2cap_cid, bool congested) {
uint8_t dhandle;
tHID_CONN* p_hcon = NULL;
/* Find CCB based on CID */
dhandle = find_conn_by_cid(l2cap_cid);
if (dhandle < HID_HOST_MAX_DEVICES) p_hcon = &hh_cb.devices[dhandle].conn;
if (p_hcon == NULL) {
HIDH_TRACE_WARNING(
"HID-Host Rcvd L2CAP congestion status, unknown CID: 0x%x", l2cap_cid);
return;
}
HIDH_TRACE_EVENT("HID-Host Rcvd L2CAP congestion status, CID: 0x%x Cong: %d",
l2cap_cid, congested);
if (congested)
p_hcon->conn_flags |= HID_CONN_FLAGS_CONGESTED;
else {
p_hcon->conn_flags &= ~HID_CONN_FLAGS_CONGESTED;
}
}
/*******************************************************************************
*
* Function hidh_l2cif_data_ind
*
* Description This function is called when data is received from L2CAP.
* if we are the originator of the connection, we are the SDP
* client, and the received message is queued up for the
* client.
*
* If we are the destination of the connection, we are the SDP
* server, so the message is passed to the server processing
* function.
*
* Returns void
*
******************************************************************************/
static void hidh_l2cif_data_ind(uint16_t l2cap_cid, BT_HDR* p_msg) {
uint8_t* p_data = (uint8_t*)(p_msg + 1) + p_msg->offset;
uint8_t ttype, param, rep_type, evt;
uint8_t dhandle;
tHID_CONN* p_hcon = NULL;
HIDH_TRACE_DEBUG("HID-Host hidh_l2cif_data_ind [l2cap_cid=0x%04x]",
l2cap_cid);
/* Find CCB based on CID */
dhandle = find_conn_by_cid(l2cap_cid);
if (dhandle < HID_HOST_MAX_DEVICES) p_hcon = &hh_cb.devices[dhandle].conn;
if (p_hcon == NULL) {
HIDH_TRACE_WARNING("HID-Host Rcvd L2CAP data, unknown CID: 0x%x",
l2cap_cid);
osi_free(p_msg);
return;
}
if (p_msg->len < 1) {
HIDH_TRACE_WARNING("Rcvd L2CAP data, invalid length %d, should be >= 1",
p_msg->len);
osi_free(p_msg);
android_errorWriteLog(0x534e4554, "80493272");
return;
}
ttype = HID_GET_TRANS_FROM_HDR(*p_data);
param = HID_GET_PARAM_FROM_HDR(*p_data);
rep_type = param & HID_PAR_REP_TYPE_MASK;
p_data++;
/* Get rid of the data type */
p_msg->len--;
p_msg->offset++;
switch (ttype) {
case HID_TRANS_HANDSHAKE:
hh_cb.callback(dhandle, hh_cb.devices[dhandle].addr,
HID_HDEV_EVT_HANDSHAKE, param, NULL);
osi_free(p_msg);
break;
case HID_TRANS_CONTROL:
switch (param) {
case HID_PAR_CONTROL_VIRTUAL_CABLE_UNPLUG:
hidh_conn_disconnect(dhandle);
/* Device is unplugging from us. Tell USB */
hh_cb.callback(dhandle, hh_cb.devices[dhandle].addr,
HID_HDEV_EVT_VC_UNPLUG, 0, NULL);
break;
default:
break;
}
osi_free(p_msg);
break;
case HID_TRANS_DATA:
evt = (hh_cb.devices[dhandle].conn.intr_cid == l2cap_cid)
? HID_HDEV_EVT_INTR_DATA
: HID_HDEV_EVT_CTRL_DATA;
hh_cb.callback(dhandle, hh_cb.devices[dhandle].addr, evt, rep_type,
p_msg);
break;
case HID_TRANS_DATAC:
evt = (hh_cb.devices[dhandle].conn.intr_cid == l2cap_cid)
? HID_HDEV_EVT_INTR_DATC
: HID_HDEV_EVT_CTRL_DATC;
hh_cb.callback(dhandle, hh_cb.devices[dhandle].addr, evt, rep_type,
p_msg);
break;
default:
osi_free(p_msg);
break;
}
}
/*******************************************************************************
*
* Function hidh_conn_snd_data
*
* Description This function is sends out data.
*
* Returns tHID_STATUS
*
******************************************************************************/
tHID_STATUS hidh_conn_snd_data(uint8_t dhandle, uint8_t trans_type,
uint8_t param, uint16_t data, uint8_t report_id,
BT_HDR* buf) {
tHID_CONN* p_hcon = &hh_cb.devices[dhandle].conn;
BT_HDR* p_buf;
uint8_t* p_out;
uint16_t bytes_copied;
bool seg_req = false;
uint16_t data_size;
uint16_t cid;
uint16_t buf_size;
uint8_t use_data = 0;
bool blank_datc = false;
if (!BTM_IsAclConnectionUp(hh_cb.devices[dhandle].addr,
BT_TRANSPORT_BR_EDR)) {
osi_free(buf);
return HID_ERR_NO_CONNECTION;
}
if (p_hcon->conn_flags & HID_CONN_FLAGS_CONGESTED) {
osi_free(buf);
return HID_ERR_CONGESTED;
}
switch (trans_type) {
case HID_TRANS_CONTROL:
case HID_TRANS_GET_REPORT:
case HID_TRANS_SET_REPORT:
case HID_TRANS_GET_PROTOCOL:
case HID_TRANS_SET_PROTOCOL:
case HID_TRANS_GET_IDLE:
case HID_TRANS_SET_IDLE:
cid = p_hcon->ctrl_cid;
buf_size = HID_CONTROL_BUF_SIZE;
break;
case HID_TRANS_DATA:
cid = p_hcon->intr_cid;
buf_size = HID_INTERRUPT_BUF_SIZE;
break;
default:
return (HID_ERR_INVALID_PARAM);
}
if (trans_type == HID_TRANS_SET_IDLE)
use_data = 1;
else if ((trans_type == HID_TRANS_GET_REPORT) && (param & 0x08))
use_data = 2;
do {
if (buf == NULL || blank_datc) {
p_buf = (BT_HDR*)osi_malloc(buf_size);
p_buf->offset = L2CAP_MIN_OFFSET;
seg_req = false;
data_size = 0;
bytes_copied = 0;
blank_datc = false;
} else if ((buf->len > (p_hcon->rem_mtu_size - 1))) {
p_buf = (BT_HDR*)osi_malloc(buf_size);
p_buf->offset = L2CAP_MIN_OFFSET;
seg_req = true;
data_size = buf->len;
bytes_copied = p_hcon->rem_mtu_size - 1;
} else {
p_buf = buf;
p_buf->offset -= 1;
seg_req = false;
data_size = buf->len;
bytes_copied = buf->len;
}
p_out = (uint8_t*)(p_buf + 1) + p_buf->offset;
*p_out++ = HID_BUILD_HDR(trans_type, param);
/* If report ID required for this device */
if ((trans_type == HID_TRANS_GET_REPORT) && (report_id != 0)) {
*p_out = report_id;
data_size = bytes_copied = 1;
}
if (seg_req) {
memcpy(p_out, (((uint8_t*)(buf + 1)) + buf->offset), bytes_copied);
buf->offset += bytes_copied;
buf->len -= bytes_copied;
} else if (use_data == 1) {
*(p_out + bytes_copied) = data & 0xff;
} else if (use_data == 2) {
*(p_out + bytes_copied) = data & 0xff;
*(p_out + bytes_copied + 1) = (data >> 8) & 0xff;
}
p_buf->len = bytes_copied + 1 + use_data;
data_size -= bytes_copied;
/* Send the buffer through L2CAP */
if ((p_hcon->conn_flags & HID_CONN_FLAGS_CONGESTED) ||
(!L2CA_DataWrite(cid, p_buf)))
return (HID_ERR_CONGESTED);
if (data_size)
trans_type = HID_TRANS_DATAC;
else if (bytes_copied == (p_hcon->rem_mtu_size - 1)) {
trans_type = HID_TRANS_DATAC;
blank_datc = true;
}
} while ((data_size != 0) || blank_datc);
return (HID_SUCCESS);
}
/*******************************************************************************
*
* Function hidh_conn_initiate
*
* Description This function is called by the management to create a
* connection.
*
* Returns void
*
******************************************************************************/
tHID_STATUS hidh_conn_initiate(uint8_t dhandle) {
uint8_t service_id = BTM_SEC_SERVICE_HIDH_NOSEC_CTRL;
uint32_t mx_chan_id = HID_NOSEC_CHN;
tHID_HOST_DEV_CTB* p_dev = &hh_cb.devices[dhandle];
if (p_dev->conn.conn_state != HID_CONN_STATE_UNUSED)
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; /* Reset initial reason for CLOSE_EVT: Connection
Attempt was made but failed */
/* We are the originator of this connection */
p_dev->conn.conn_flags = HID_CONN_FLAGS_IS_ORIG;
if (p_dev->attr_mask & HID_SEC_REQUIRED) {
service_id = BTM_SEC_SERVICE_HIDH_SEC_CTRL;
mx_chan_id = HID_SEC_CHN;
}
BTM_SetOutService(p_dev->addr, service_id, mx_chan_id);
/* Check if L2CAP started the connection process */
p_dev->conn.ctrl_cid = L2CA_ConnectReq(HID_PSM_CONTROL, p_dev->addr);
if (p_dev->conn.ctrl_cid == 0) {
HIDH_TRACE_WARNING("HID-Host Originate failed");
hh_cb.callback(dhandle, hh_cb.devices[dhandle].addr, HID_HDEV_EVT_CLOSE,
HID_ERR_L2CAP_FAILED, NULL);
} else {
/* Transition to the next appropriate state, waiting for connection confirm
* on control channel. */
p_dev->conn.conn_state = HID_CONN_STATE_CONNECTING_CTRL;
}
return (HID_SUCCESS);
}
/*******************************************************************************
*
* Function find_conn_by_cid
*
* Description This function finds a connection control block based on CID
*
* Returns address of control block, or NULL if not found
*
******************************************************************************/
static uint8_t find_conn_by_cid(uint16_t cid) {
uint8_t xx;
for (xx = 0; xx < HID_HOST_MAX_DEVICES; xx++) {
if ((hh_cb.devices[xx].in_use) &&
(hh_cb.devices[xx].conn.conn_state != HID_CONN_STATE_UNUSED) &&
((hh_cb.devices[xx].conn.ctrl_cid == cid) ||
(hh_cb.devices[xx].conn.intr_cid == cid)))
break;
}
return (xx);
}
void hidh_conn_dereg(void) {
L2CA_Deregister(HID_PSM_CONTROL);
L2CA_Deregister(HID_PSM_INTERRUPT);
}
/*******************************************************************************
*
* Function hidh_conn_retry
*
* Description This function is called to retry a failed connection.
*
* Returns void
*
******************************************************************************/
static void hidh_conn_retry(uint8_t dhandle) {
tHID_HOST_DEV_CTB* p_dev = &hh_cb.devices[dhandle];
p_dev->conn.conn_state = HID_CONN_STATE_UNUSED;
#if (HID_HOST_REPAGE_WIN > 0)
period_ms_t interval_ms = HID_HOST_REPAGE_WIN * 1000;
alarm_set_on_mloop(p_dev->conn.process_repage_timer, interval_ms,
hidh_process_repage_timer_timeout, UINT_TO_PTR(dhandle));
#else
hidh_try_repage(dhandle);
#endif
}