| /****************************************************************************** |
| * |
| * 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 <cstdint> |
| |
| #include "bta/include/bta_api.h" |
| #include "btif/include/btif_hd.h" |
| #include "osi/include/allocator.h" |
| #include "stack/hid/hidd_int.h" |
| #include "stack/include/bt_hdr.h" |
| #include "stack/include/bt_types.h" |
| #include "types/raw_address.h" |
| |
| #include <base/logging.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, uint16_t result, |
| tL2CAP_CFG_INFO* p_cfg); |
| static void hidd_l2cif_disconnect_ind(uint16_t cid, bool ack_needed); |
| static void hidd_l2cif_disconnect(uint16_t cid); |
| 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 void hidd_on_l2cap_error(uint16_t lcid, uint16_t result); |
| static const tL2CAP_APPL_INFO dev_reg_info = {hidd_l2cif_connect_ind, |
| hidd_l2cif_connect_cfm, |
| hidd_l2cif_config_ind, |
| hidd_l2cif_config_cfm, |
| hidd_l2cif_disconnect_ind, |
| NULL, |
| hidd_l2cif_data_ind, |
| hidd_l2cif_cong_ind, |
| NULL, |
| hidd_on_l2cap_error, |
| NULL, |
| NULL, |
| NULL}; |
| |
| /******************************************************************************* |
| * |
| * 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 = &hd_cb.device.conn; |
| |
| if (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 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_DEV_DEV_CTB* p_dev; |
| bool accept = TRUE; // accept by default |
| |
| HIDD_TRACE_EVENT("%s: psm=%04x cid=%04x", __func__, psm, cid); |
| |
| p_dev = &hd_cb.device; |
| |
| if (!hd_cb.allow_incoming) { |
| HIDD_TRACE_WARNING("%s: incoming connections not allowed, rejecting", |
| __func__); |
| L2CA_DisconnectReq(cid); |
| |
| return; |
| } |
| |
| tHID_CONN* 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_DisconnectReq(cid); |
| 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->disc_reason = HID_SUCCESS; |
| p_hcon->conn_state = HID_CONN_STATE_CONNECTING_INTR; |
| return; |
| } |
| |
| // for INTR we go directly to config state |
| p_hcon->conn_state = HID_CONN_STATE_CONFIG; |
| p_hcon->intr_cid = cid; |
| } |
| |
| static void hidd_on_l2cap_error(uint16_t lcid, uint16_t result) { |
| HIDD_TRACE_WARNING("%s: connection of config failed, now disconnect", |
| __func__); |
| |
| hidd_conn_disconnect(); |
| |
| // NOTE that the client doesn't care about error code |
| hd_cb.callback(hd_cb.device.addr, HID_DHOST_EVT_CLOSE, |
| HID_L2CAP_CONN_FAIL | (uint32_t)result, NULL); |
| } |
| |
| /******************************************************************************* |
| * |
| * 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_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) { |
| LOG(ERROR) << __func__ << ": invoked with non OK status"; |
| return; |
| } |
| |
| /* CTRL connect conf */ |
| if (cid == p_hcon->ctrl_cid) { |
| p_hcon->disc_reason = HID_SUCCESS; |
| p_hcon->conn_state = HID_CONN_STATE_CONFIG; |
| } else { |
| p_hcon->conn_state = HID_CONN_STATE_CONFIG; |
| } |
| |
| 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) { |
| HIDD_TRACE_EVENT("%s: cid=%04x", __func__, cid); |
| |
| tHID_CONN* 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; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function hidd_l2cif_config_cfm |
| * |
| * Description Handles incoming L2CAP configuration response |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static void hidd_l2cif_config_cfm(uint16_t cid, uint16_t initiator, |
| tL2CAP_CFG_INFO* p_cfg) { |
| hidd_l2cif_config_ind(cid, p_cfg); |
| |
| |
| HIDD_TRACE_EVENT("%s: cid=%04x", __func__, cid); |
| |
| tHID_CONN* 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; |
| } |
| |
| // update flags |
| if (cid == p_hcon->ctrl_cid) { |
| if (p_hcon->conn_flags & HID_CONN_FLAGS_IS_ORIG) { |
| p_hcon->disc_reason = HID_L2CAP_CONN_FAIL; |
| if ((p_hcon->intr_cid = |
| L2CA_ConnectReq2(HID_PSM_INTERRUPT, hd_cb.device.addr, |
| BTA_SEC_AUTHENTICATE | BTA_SEC_ENCRYPT)) == 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; |
| } |
| } |
| } |
| |
| 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) { |
| |
| HIDD_TRACE_EVENT("%s: cid=%04x ack_needed=%d", __func__, cid, ack_needed); |
| |
| tHID_CONN* 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; |
| } |
| |
| 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); |
| } |
| } |
| |
| static void hidd_l2cif_disconnect(uint16_t cid) { |
| L2CA_DisconnectReq(cid); |
| |
| |
| HIDD_TRACE_EVENT("%s: cid=%04x", __func__, cid); |
| |
| tHID_CONN* 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) { |
| |
| HIDD_TRACE_EVENT("%s: cid=%04x congested=%d", __func__, cid, congested); |
| |
| tHID_CONN* 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) { |
| 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; |
| } |
| |
| tHID_CONN* 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; |
| 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; |
| |
| if (!L2CA_Register2(HID_PSM_CONTROL, dev_reg_info, false /* enable_snoop */, |
| nullptr, HID_DEV_MTU_SIZE, 0, |
| BTA_SEC_AUTHENTICATE | BTA_SEC_ENCRYPT)) { |
| HIDD_TRACE_ERROR("HID Control (device) registration failed"); |
| return (HID_ERR_L2CAP_FAILED); |
| } |
| |
| if (!L2CA_Register2(HID_PSM_INTERRUPT, dev_reg_info, false /* enable_snoop */, |
| nullptr, HID_DEV_MTU_SIZE, 0, |
| BTA_SEC_AUTHENTICATE | BTA_SEC_ENCRYPT)) { |
| 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; |
| |
| /* Check if L2CAP started the connection process */ |
| if ((p_dev->conn.ctrl_cid = |
| L2CA_ConnectReq2(HID_PSM_CONTROL, p_dev->addr, |
| BTA_SEC_AUTHENTICATE | BTA_SEC_ENCRYPT)) == 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) { |
| |
| 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; |
| } |
| |
| tHID_CONN* 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) { |
| hidd_l2cif_disconnect(p_hcon->intr_cid); |
| } else if (p_hcon->ctrl_cid) { |
| hidd_l2cif_disconnect(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) { |
| 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); |
| |
| tHID_CONN* 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); |
| } |
