| /****************************************************************************** |
| * |
| * Copyright (C) 2009-2012 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 functions relating to BLE management. |
| * |
| ******************************************************************************/ |
| |
| #include <string.h> |
| #include "bt_target.h" |
| #include "bt_utils.h" |
| #include "l2cdefs.h" |
| #include "l2c_int.h" |
| #include "btu.h" |
| #include "btm_int.h" |
| #include "hcimsgs.h" |
| #include "device/include/controller.h" |
| #include "stack_config.h" |
| #include "osi/include/osi.h" |
| |
| #if (BLE_INCLUDED == TRUE) |
| |
| extern fixed_queue_t *btu_general_alarm_queue; |
| |
| static void l2cble_start_conn_update (tL2C_LCB *p_lcb); |
| |
| /******************************************************************************* |
| ** |
| ** Function L2CA_CancelBleConnectReq |
| ** |
| ** Description Cancel a pending connection attempt to a BLE device. |
| ** |
| ** Parameters: BD Address of remote |
| ** |
| ** Return value: true if connection was cancelled |
| ** |
| *******************************************************************************/ |
| bool L2CA_CancelBleConnectReq (BD_ADDR rem_bda) |
| { |
| tL2C_LCB *p_lcb; |
| |
| /* There can be only one BLE connection request outstanding at a time */ |
| if (btm_ble_get_conn_st() == BLE_CONN_IDLE) |
| { |
| L2CAP_TRACE_WARNING ("%s - no connection pending", __func__); |
| return(false); |
| } |
| |
| if (memcmp (rem_bda, l2cb.ble_connecting_bda, BD_ADDR_LEN)) |
| { |
| L2CAP_TRACE_WARNING ("%s - different BDA Connecting: %08x%04x Cancel: %08x%04x", __func__, |
| (l2cb.ble_connecting_bda[0]<<24)+(l2cb.ble_connecting_bda[1]<<16)+(l2cb.ble_connecting_bda[2]<<8)+l2cb.ble_connecting_bda[3], |
| (l2cb.ble_connecting_bda[4]<<8)+l2cb.ble_connecting_bda[5], |
| (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], (rem_bda[4]<<8)+rem_bda[5]); |
| btm_ble_dequeue_direct_conn_req(rem_bda); |
| return(false); |
| } |
| |
| btsnd_hcic_ble_create_conn_cancel(); |
| |
| p_lcb = l2cu_find_lcb_by_bd_addr(rem_bda, BT_TRANSPORT_LE); |
| /* Do not remove lcb if an LE link is already up as a peripheral */ |
| if (p_lcb != NULL && |
| !(p_lcb->link_role == HCI_ROLE_SLAVE && btm_bda_to_acl(rem_bda, BT_TRANSPORT_LE) != NULL)) |
| { |
| p_lcb->disc_reason = L2CAP_CONN_CANCEL; |
| l2cu_release_lcb (p_lcb); |
| } |
| /* update state to be cancel, wait for connection cancel complete */ |
| btm_ble_set_conn_st (BLE_CONN_CANCEL); |
| |
| return(true); |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function L2CA_UpdateBleConnParams |
| ** |
| ** Description Update BLE connection parameters. |
| ** |
| ** Parameters: BD Address of remote |
| ** |
| ** Return value: true if update started |
| ** |
| *******************************************************************************/ |
| bool L2CA_UpdateBleConnParams (BD_ADDR rem_bda, uint16_t min_int, uint16_t max_int, |
| uint16_t latency, uint16_t timeout) |
| { |
| tL2C_LCB *p_lcb; |
| tACL_CONN *p_acl_cb = btm_bda_to_acl(rem_bda, BT_TRANSPORT_LE); |
| |
| /* See if we have a link control block for the remote device */ |
| p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda, BT_TRANSPORT_LE); |
| |
| /* If we don't have one, create one and accept the connection. */ |
| if (!p_lcb || !p_acl_cb) |
| { |
| L2CAP_TRACE_WARNING ("L2CA_UpdateBleConnParams - unknown BD_ADDR %08x%04x", |
| (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], |
| (rem_bda[4]<<8)+rem_bda[5]); |
| return(false); |
| } |
| |
| if (p_lcb->transport != BT_TRANSPORT_LE) |
| { |
| L2CAP_TRACE_WARNING ("L2CA_UpdateBleConnParams - BD_ADDR %08x%04x not LE", |
| (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], |
| (rem_bda[4]<<8)+rem_bda[5]); |
| return(false); |
| } |
| |
| p_lcb->min_interval = min_int; |
| p_lcb->max_interval = max_int; |
| p_lcb->latency = latency; |
| p_lcb->timeout = timeout; |
| p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM; |
| |
| l2cble_start_conn_update(p_lcb); |
| |
| return(true); |
| } |
| |
| |
| /******************************************************************************* |
| ** |
| ** Function L2CA_EnableUpdateBleConnParams |
| ** |
| ** Description Enable or disable update based on the request from the peer |
| ** |
| ** Parameters: BD Address of remote |
| ** |
| ** Return value: true if update started |
| ** |
| *******************************************************************************/ |
| bool L2CA_EnableUpdateBleConnParams (BD_ADDR rem_bda, bool enable) |
| { |
| if (stack_config_get_interface()->get_pts_conn_updates_disabled()) |
| return false; |
| |
| tL2C_LCB *p_lcb; |
| |
| /* See if we have a link control block for the remote device */ |
| p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda, BT_TRANSPORT_LE); |
| |
| if (!p_lcb) |
| { |
| L2CAP_TRACE_WARNING ("L2CA_EnableUpdateBleConnParams - unknown BD_ADDR %08x%04x", |
| (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], |
| (rem_bda[4]<<8)+rem_bda[5]); |
| return (false); |
| } |
| |
| L2CAP_TRACE_API ("%s - BD_ADDR %08x%04x enable %d current upd state 0x%02x",__func__, |
| (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], |
| (rem_bda[4]<<8)+rem_bda[5], enable, p_lcb->conn_update_mask); |
| |
| if (p_lcb->transport != BT_TRANSPORT_LE) |
| { |
| L2CAP_TRACE_WARNING ("%s - BD_ADDR %08x%04x not LE (link role %d)", __func__, |
| (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], |
| (rem_bda[4]<<8)+rem_bda[5], p_lcb->link_role); |
| return (false); |
| } |
| |
| if (enable) |
| p_lcb->conn_update_mask &= ~L2C_BLE_CONN_UPDATE_DISABLE; |
| else |
| p_lcb->conn_update_mask |= L2C_BLE_CONN_UPDATE_DISABLE; |
| |
| l2cble_start_conn_update(p_lcb); |
| |
| return (true); |
| } |
| |
| |
| /******************************************************************************* |
| ** |
| ** Function L2CA_GetBleConnRole |
| ** |
| ** Description This function returns the connection role. |
| ** |
| ** Returns link role. |
| ** |
| *******************************************************************************/ |
| uint8_t L2CA_GetBleConnRole (BD_ADDR bd_addr) |
| { |
| uint8_t role = HCI_ROLE_UNKNOWN; |
| |
| tL2C_LCB *p_lcb; |
| |
| if ((p_lcb = l2cu_find_lcb_by_bd_addr (bd_addr, BT_TRANSPORT_LE)) != NULL) |
| role = p_lcb->link_role; |
| |
| return role; |
| } |
| /******************************************************************************* |
| ** |
| ** Function L2CA_GetDisconnectReason |
| ** |
| ** Description This function returns the disconnect reason code. |
| ** |
| ** Returns disconnect reason |
| ** |
| *******************************************************************************/ |
| uint16_t L2CA_GetDisconnectReason (BD_ADDR remote_bda, tBT_TRANSPORT transport) |
| { |
| tL2C_LCB *p_lcb; |
| uint16_t reason = 0; |
| |
| if ((p_lcb = l2cu_find_lcb_by_bd_addr (remote_bda, transport)) != NULL) |
| reason = p_lcb->disc_reason; |
| |
| L2CAP_TRACE_DEBUG ("L2CA_GetDisconnectReason=%d ",reason); |
| |
| return reason; |
| } |
| |
| void l2cble_use_preferred_conn_params(BD_ADDR bda) { |
| tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE); |
| tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (bda); |
| |
| /* If there are any preferred connection parameters, set them now */ |
| if ( (p_dev_rec->conn_params.min_conn_int >= BTM_BLE_CONN_INT_MIN ) && |
| (p_dev_rec->conn_params.min_conn_int <= BTM_BLE_CONN_INT_MAX ) && |
| (p_dev_rec->conn_params.max_conn_int >= BTM_BLE_CONN_INT_MIN ) && |
| (p_dev_rec->conn_params.max_conn_int <= BTM_BLE_CONN_INT_MAX ) && |
| (p_dev_rec->conn_params.slave_latency <= BTM_BLE_CONN_LATENCY_MAX ) && |
| (p_dev_rec->conn_params.supervision_tout >= BTM_BLE_CONN_SUP_TOUT_MIN) && |
| (p_dev_rec->conn_params.supervision_tout <= BTM_BLE_CONN_SUP_TOUT_MAX) && |
| ((p_lcb->min_interval < p_dev_rec->conn_params.min_conn_int && |
| p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) || |
| (p_lcb->min_interval > p_dev_rec->conn_params.max_conn_int) || |
| (p_lcb->latency > p_dev_rec->conn_params.slave_latency) || |
| (p_lcb->timeout > p_dev_rec->conn_params.supervision_tout))) |
| { |
| L2CAP_TRACE_DEBUG ("%s: HANDLE=%d min_conn_int=%d max_conn_int=%d slave_latency=%d supervision_tout=%d", __func__, |
| p_lcb->handle, p_dev_rec->conn_params.min_conn_int, p_dev_rec->conn_params.max_conn_int, |
| p_dev_rec->conn_params.slave_latency, p_dev_rec->conn_params.supervision_tout); |
| |
| p_lcb->min_interval = p_dev_rec->conn_params.min_conn_int; |
| p_lcb->max_interval = p_dev_rec->conn_params.max_conn_int; |
| p_lcb->timeout = p_dev_rec->conn_params.supervision_tout; |
| p_lcb->latency = p_dev_rec->conn_params.slave_latency; |
| |
| btsnd_hcic_ble_upd_ll_conn_params (p_lcb->handle, |
| p_dev_rec->conn_params.min_conn_int, |
| p_dev_rec->conn_params.max_conn_int, |
| p_dev_rec->conn_params.slave_latency, |
| p_dev_rec->conn_params.supervision_tout, |
| 0, 0); |
| } |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_notify_le_connection |
| ** |
| ** Description This function notifiy the l2cap connection to the app layer |
| ** |
| ** Returns none |
| ** |
| *******************************************************************************/ |
| void l2cble_notify_le_connection (BD_ADDR bda) |
| { |
| tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE); |
| tACL_CONN *p_acl = btm_bda_to_acl(bda, BT_TRANSPORT_LE) ; |
| tL2C_CCB *p_ccb; |
| |
| if (p_lcb != NULL && p_acl != NULL && p_lcb->link_state != LST_CONNECTED) |
| { |
| /* update link status */ |
| btm_establish_continue(p_acl); |
| /* update l2cap link status and send callback */ |
| p_lcb->link_state = LST_CONNECTED; |
| l2cu_process_fixed_chnl_resp (p_lcb); |
| } |
| |
| if (p_lcb != NULL) { |
| /* For all channels, send the event through their FSMs */ |
| for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb; p_ccb = p_ccb->p_next_ccb) |
| { |
| if (p_ccb->chnl_state == CST_CLOSED) |
| l2c_csm_execute (p_ccb, L2CEVT_LP_CONNECT_CFM, NULL); |
| } |
| } |
| |
| l2cble_use_preferred_conn_params(bda); |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_scanner_conn_comp |
| ** |
| ** Description This function is called when an HCI Connection Complete |
| ** event is received while we are a scanner (so we are master). |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2cble_scanner_conn_comp (uint16_t handle, BD_ADDR bda, tBLE_ADDR_TYPE type, |
| uint16_t conn_interval, uint16_t conn_latency, uint16_t conn_timeout) |
| { |
| tL2C_LCB *p_lcb; |
| tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (bda); |
| |
| L2CAP_TRACE_DEBUG ("l2cble_scanner_conn_comp: HANDLE=%d addr_type=%d conn_interval=%d slave_latency=%d supervision_tout=%d", |
| handle, type, conn_interval, conn_latency, conn_timeout); |
| |
| l2cb.is_ble_connecting = false; |
| |
| /* See if we have a link control block for the remote device */ |
| p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE); |
| |
| /* If we don't have one, create one. this is auto connection complete. */ |
| if (!p_lcb) |
| { |
| p_lcb = l2cu_allocate_lcb (bda, false, BT_TRANSPORT_LE); |
| if (!p_lcb) |
| { |
| btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION); |
| L2CAP_TRACE_ERROR ("l2cble_scanner_conn_comp - failed to allocate LCB"); |
| return; |
| } |
| else |
| { |
| if (!l2cu_initialize_fixed_ccb (p_lcb, L2CAP_ATT_CID, &l2cb.fixed_reg[L2CAP_ATT_CID - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts)) |
| { |
| btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION); |
| L2CAP_TRACE_WARNING ("l2cble_scanner_conn_comp - LCB but no CCB"); |
| return ; |
| } |
| } |
| } |
| else if (p_lcb->link_state != LST_CONNECTING) |
| { |
| L2CAP_TRACE_ERROR ("L2CAP got BLE scanner conn_comp in bad state: %d", p_lcb->link_state); |
| return; |
| } |
| alarm_cancel(p_lcb->l2c_lcb_timer); |
| |
| /* Save the handle */ |
| p_lcb->handle = handle; |
| |
| /* Connected OK. Change state to connected, we were scanning so we are master */ |
| p_lcb->link_role = HCI_ROLE_MASTER; |
| p_lcb->transport = BT_TRANSPORT_LE; |
| |
| /* update link parameter, set slave link as non-spec default upon link up */ |
| p_lcb->min_interval = p_lcb->max_interval = conn_interval; |
| p_lcb->timeout = conn_timeout; |
| p_lcb->latency = conn_latency; |
| p_lcb->conn_update_mask = L2C_BLE_NOT_DEFAULT_PARAM; |
| |
| /* Tell BTM Acl management about the link */ |
| btm_acl_created (bda, NULL, p_dev_rec->sec_bd_name, handle, p_lcb->link_role, BT_TRANSPORT_LE); |
| |
| p_lcb->peer_chnl_mask[0] = L2CAP_FIXED_CHNL_ATT_BIT | L2CAP_FIXED_CHNL_BLE_SIG_BIT | L2CAP_FIXED_CHNL_SMP_BIT; |
| |
| btm_ble_set_conn_st(BLE_CONN_IDLE); |
| |
| #if (BLE_PRIVACY_SPT == TRUE) |
| btm_ble_disable_resolving_list(BTM_BLE_RL_INIT, true); |
| #endif |
| } |
| |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_advertiser_conn_comp |
| ** |
| ** Description This function is called when an HCI Connection Complete |
| ** event is received while we are an advertiser (so we are slave). |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2cble_advertiser_conn_comp (uint16_t handle, BD_ADDR bda, UNUSED_ATTR tBLE_ADDR_TYPE type, |
| UNUSED_ATTR uint16_t conn_interval, UNUSED_ATTR uint16_t conn_latency, |
| UNUSED_ATTR uint16_t conn_timeout) |
| { |
| tL2C_LCB *p_lcb; |
| tBTM_SEC_DEV_REC *p_dev_rec; |
| |
| /* See if we have a link control block for the remote device */ |
| p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE); |
| |
| /* If we don't have one, create one and accept the connection. */ |
| if (!p_lcb) |
| { |
| p_lcb = l2cu_allocate_lcb (bda, false, BT_TRANSPORT_LE); |
| if (!p_lcb) |
| { |
| btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION); |
| L2CAP_TRACE_ERROR ("l2cble_advertiser_conn_comp - failed to allocate LCB"); |
| return; |
| } |
| else |
| { |
| if (!l2cu_initialize_fixed_ccb (p_lcb, L2CAP_ATT_CID, &l2cb.fixed_reg[L2CAP_ATT_CID - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts)) |
| { |
| btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION); |
| L2CAP_TRACE_WARNING ("l2cble_scanner_conn_comp - LCB but no CCB"); |
| return ; |
| } |
| } |
| } |
| |
| /* Save the handle */ |
| p_lcb->handle = handle; |
| |
| /* Connected OK. Change state to connected, we were advertising, so we are slave */ |
| p_lcb->link_role = HCI_ROLE_SLAVE; |
| p_lcb->transport = BT_TRANSPORT_LE; |
| |
| /* update link parameter, set slave link as non-spec default upon link up */ |
| p_lcb->min_interval = p_lcb->max_interval = conn_interval; |
| p_lcb->timeout = conn_timeout; |
| p_lcb->latency = conn_latency; |
| p_lcb->conn_update_mask = L2C_BLE_NOT_DEFAULT_PARAM; |
| |
| /* Tell BTM Acl management about the link */ |
| p_dev_rec = btm_find_or_alloc_dev (bda); |
| |
| btm_acl_created (bda, NULL, p_dev_rec->sec_bd_name, handle, p_lcb->link_role, BT_TRANSPORT_LE); |
| |
| #if (BLE_PRIVACY_SPT == TRUE) |
| btm_ble_disable_resolving_list(BTM_BLE_RL_ADV, true); |
| #endif |
| |
| p_lcb->peer_chnl_mask[0] = L2CAP_FIXED_CHNL_ATT_BIT | L2CAP_FIXED_CHNL_BLE_SIG_BIT | L2CAP_FIXED_CHNL_SMP_BIT; |
| |
| if (!HCI_LE_SLAVE_INIT_FEAT_EXC_SUPPORTED(controller_get_interface()->get_features_ble()->as_array)) |
| { |
| p_lcb->link_state = LST_CONNECTED; |
| l2cu_process_fixed_chnl_resp (p_lcb); |
| } |
| |
| /* when adv and initiating are both active, cancel the direct connection */ |
| if (l2cb.is_ble_connecting && memcmp(bda, l2cb.ble_connecting_bda, BD_ADDR_LEN) == 0) |
| { |
| L2CA_CancelBleConnectReq(bda); |
| } |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_conn_comp |
| ** |
| ** Description This function is called when an HCI Connection Complete |
| ** event is received. |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2cble_conn_comp(uint16_t handle, uint8_t role, BD_ADDR bda, tBLE_ADDR_TYPE type, |
| uint16_t conn_interval, uint16_t conn_latency, uint16_t conn_timeout) |
| { |
| btm_ble_update_link_topology_mask(role, true); |
| |
| if (role == HCI_ROLE_MASTER) |
| { |
| l2cble_scanner_conn_comp(handle, bda, type, conn_interval, conn_latency, conn_timeout); |
| } |
| else |
| { |
| l2cble_advertiser_conn_comp(handle, bda, type, conn_interval, conn_latency, conn_timeout); |
| } |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_start_conn_update |
| ** |
| ** Description start BLE connection parameter update process based on status |
| ** |
| ** Parameters: lcb : l2cap link control block |
| ** |
| ** Return value: none |
| ** |
| *******************************************************************************/ |
| static void l2cble_start_conn_update (tL2C_LCB *p_lcb) |
| { |
| uint16_t min_conn_int, max_conn_int, slave_latency, supervision_tout; |
| tACL_CONN *p_acl_cb = btm_bda_to_acl(p_lcb->remote_bd_addr, BT_TRANSPORT_LE); |
| |
| // TODO(armansito): The return value of this call wasn't being used but the |
| // logic of this function might be depending on its side effects. We should |
| // verify if this call is needed at all and remove it otherwise. |
| btm_find_or_alloc_dev(p_lcb->remote_bd_addr); |
| |
| if (p_lcb->conn_update_mask & L2C_BLE_UPDATE_PENDING) return; |
| |
| if (p_lcb->conn_update_mask & L2C_BLE_CONN_UPDATE_DISABLE) |
| { |
| /* application requests to disable parameters update. |
| If parameters are already updated, lets set them |
| up to what has been requested during connection establishement */ |
| if (p_lcb->conn_update_mask & L2C_BLE_NOT_DEFAULT_PARAM && |
| /* current connection interval is greater than default min */ |
| p_lcb->min_interval > BTM_BLE_CONN_INT_MIN) |
| { |
| /* use 7.5 ms as fast connection parameter, 0 slave latency */ |
| min_conn_int = max_conn_int = BTM_BLE_CONN_INT_MIN; |
| slave_latency = BTM_BLE_CONN_SLAVE_LATENCY_DEF; |
| supervision_tout = BTM_BLE_CONN_TIMEOUT_DEF; |
| |
| /* if both side 4.1, or we are master device, send HCI command */ |
| if (p_lcb->link_role == HCI_ROLE_MASTER |
| #if (BLE_LLT_INCLUDED == TRUE) |
| || (HCI_LE_CONN_PARAM_REQ_SUPPORTED(controller_get_interface()->get_features_ble()->as_array) && |
| HCI_LE_CONN_PARAM_REQ_SUPPORTED(p_acl_cb->peer_le_features)) |
| #endif |
| ) |
| { |
| btsnd_hcic_ble_upd_ll_conn_params(p_lcb->handle, min_conn_int, max_conn_int, |
| slave_latency, supervision_tout, 0, 0); |
| p_lcb->conn_update_mask |= L2C_BLE_UPDATE_PENDING; |
| } |
| else |
| { |
| l2cu_send_peer_ble_par_req (p_lcb, min_conn_int, max_conn_int, slave_latency, supervision_tout); |
| } |
| p_lcb->conn_update_mask &= ~L2C_BLE_NOT_DEFAULT_PARAM; |
| p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM; |
| } |
| } |
| else |
| { |
| /* application allows to do update, if we were delaying one do it now */ |
| if (p_lcb->conn_update_mask & L2C_BLE_NEW_CONN_PARAM) |
| { |
| /* if both side 4.1, or we are master device, send HCI command */ |
| if (p_lcb->link_role == HCI_ROLE_MASTER |
| #if (BLE_LLT_INCLUDED == TRUE) |
| || (HCI_LE_CONN_PARAM_REQ_SUPPORTED(controller_get_interface()->get_features_ble()->as_array) && |
| HCI_LE_CONN_PARAM_REQ_SUPPORTED(p_acl_cb->peer_le_features)) |
| #endif |
| ) |
| { |
| btsnd_hcic_ble_upd_ll_conn_params(p_lcb->handle, p_lcb->min_interval, |
| p_lcb->max_interval, p_lcb->latency, p_lcb->timeout, 0, 0); |
| p_lcb->conn_update_mask |= L2C_BLE_UPDATE_PENDING; |
| } |
| else |
| { |
| l2cu_send_peer_ble_par_req (p_lcb, p_lcb->min_interval, p_lcb->max_interval, |
| p_lcb->latency, p_lcb->timeout); |
| } |
| p_lcb->conn_update_mask &= ~L2C_BLE_NEW_CONN_PARAM; |
| p_lcb->conn_update_mask |= L2C_BLE_NOT_DEFAULT_PARAM; |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_process_conn_update_evt |
| ** |
| ** Description This function enables the connection update request from remote |
| ** after a successful connection update response is received. |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2cble_process_conn_update_evt (uint16_t handle, uint8_t status, |
| uint16_t interval, uint16_t latency, uint16_t timeout) |
| { |
| L2CAP_TRACE_DEBUG("%s", __func__); |
| |
| /* See if we have a link control block for the remote device */ |
| tL2C_LCB *p_lcb = l2cu_find_lcb_by_handle(handle); |
| if (!p_lcb) |
| { |
| L2CAP_TRACE_WARNING("%s: Invalid handle: %d", __func__, handle); |
| return; |
| } |
| |
| p_lcb->conn_update_mask &= ~L2C_BLE_UPDATE_PENDING; |
| |
| if (status != HCI_SUCCESS) |
| { |
| L2CAP_TRACE_WARNING("%s: Error status: %d", __func__, status); |
| } |
| |
| l2cble_start_conn_update(p_lcb); |
| |
| L2CAP_TRACE_DEBUG("%s: conn_update_mask=%d", __func__, p_lcb->conn_update_mask); |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_process_sig_cmd |
| ** |
| ** Description This function is called when a signalling packet is received |
| ** on the BLE signalling CID |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2cble_process_sig_cmd (tL2C_LCB *p_lcb, uint8_t *p, uint16_t pkt_len) |
| { |
| uint8_t *p_pkt_end; |
| uint8_t cmd_code, id; |
| uint16_t cmd_len; |
| uint16_t min_interval, max_interval, latency, timeout; |
| tL2C_CONN_INFO con_info; |
| uint16_t lcid = 0, rcid = 0, mtu = 0, mps = 0, initial_credit = 0; |
| tL2C_CCB *p_ccb = NULL, *temp_p_ccb = NULL; |
| tL2C_RCB *p_rcb; |
| uint16_t credit; |
| p_pkt_end = p + pkt_len; |
| |
| STREAM_TO_UINT8 (cmd_code, p); |
| STREAM_TO_UINT8 (id, p); |
| STREAM_TO_UINT16 (cmd_len, p); |
| |
| /* Check command length does not exceed packet length */ |
| if ((p + cmd_len) > p_pkt_end) |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - LE - format error, pkt_len: %d cmd_len: %d code: %d", pkt_len, cmd_len, cmd_code); |
| return; |
| } |
| |
| switch (cmd_code) |
| { |
| case L2CAP_CMD_REJECT: |
| p += 2; |
| break; |
| |
| case L2CAP_CMD_ECHO_REQ: |
| case L2CAP_CMD_ECHO_RSP: |
| case L2CAP_CMD_INFO_RSP: |
| case L2CAP_CMD_INFO_REQ: |
| l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0); |
| break; |
| |
| case L2CAP_CMD_BLE_UPDATE_REQ: |
| STREAM_TO_UINT16 (min_interval, p); /* 0x0006 - 0x0C80 */ |
| STREAM_TO_UINT16 (max_interval, p); /* 0x0006 - 0x0C80 */ |
| STREAM_TO_UINT16 (latency, p); /* 0x0000 - 0x03E8 */ |
| STREAM_TO_UINT16 (timeout, p); /* 0x000A - 0x0C80 */ |
| /* If we are a master, the slave wants to update the parameters */ |
| if (p_lcb->link_role == HCI_ROLE_MASTER) |
| { |
| if (min_interval < BTM_BLE_CONN_INT_MIN_LIMIT) |
| min_interval = BTM_BLE_CONN_INT_MIN_LIMIT; |
| |
| // While this could result in connection parameters that fall |
| // outside fo the range requested, this will allow the connection |
| // to remain established. |
| // In other words, this is a workaround for certain peripherals. |
| if (max_interval < BTM_BLE_CONN_INT_MIN_LIMIT) |
| max_interval = BTM_BLE_CONN_INT_MIN_LIMIT; |
| |
| if (min_interval < BTM_BLE_CONN_INT_MIN || min_interval > BTM_BLE_CONN_INT_MAX || |
| max_interval < BTM_BLE_CONN_INT_MIN || max_interval > BTM_BLE_CONN_INT_MAX || |
| latency > BTM_BLE_CONN_LATENCY_MAX || |
| /*(timeout >= max_interval && latency > (timeout * 10/(max_interval * 1.25) - 1)) ||*/ |
| timeout < BTM_BLE_CONN_SUP_TOUT_MIN || timeout > BTM_BLE_CONN_SUP_TOUT_MAX || |
| max_interval < min_interval) |
| { |
| l2cu_send_peer_ble_par_rsp (p_lcb, L2CAP_CFG_UNACCEPTABLE_PARAMS, id); |
| } |
| else |
| { |
| |
| l2cu_send_peer_ble_par_rsp (p_lcb, L2CAP_CFG_OK, id); |
| |
| p_lcb->min_interval = min_interval; |
| p_lcb->max_interval = max_interval; |
| p_lcb->latency = latency; |
| p_lcb->timeout = timeout; |
| p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM; |
| |
| l2cble_start_conn_update(p_lcb); |
| } |
| } |
| else |
| l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0); |
| break; |
| |
| case L2CAP_CMD_BLE_UPDATE_RSP: |
| p += 2; |
| break; |
| |
| case L2CAP_CMD_BLE_CREDIT_BASED_CONN_REQ: |
| STREAM_TO_UINT16 (con_info.psm, p); |
| STREAM_TO_UINT16 (rcid, p); |
| STREAM_TO_UINT16 (mtu, p); |
| STREAM_TO_UINT16 (mps, p); |
| STREAM_TO_UINT16 (initial_credit, p); |
| |
| L2CAP_TRACE_DEBUG ("Recv L2CAP_CMD_BLE_CREDIT_BASED_CONN_REQ with " |
| "mtu = %d, " |
| "mps = %d, " |
| "initial credit = %d", mtu, mps, initial_credit); |
| |
| if ((p_rcb = l2cu_find_ble_rcb_by_psm (con_info.psm)) == NULL) |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - rcvd conn req for unknown PSM: 0x%04x", con_info.psm); |
| l2cu_reject_ble_connection (p_lcb, id, L2CAP_LE_NO_PSM); |
| break; |
| } |
| else |
| { |
| if (!p_rcb->api.pL2CA_ConnectInd_Cb) |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - rcvd conn req for outgoing-only connection PSM: %d", con_info.psm); |
| l2cu_reject_ble_connection (p_lcb, id, L2CAP_CONN_NO_PSM); |
| break; |
| } |
| } |
| |
| /* Allocate a ccb for this.*/ |
| if ((p_ccb = l2cu_allocate_ccb (p_lcb, 0)) == NULL) |
| { |
| L2CAP_TRACE_ERROR ("L2CAP - unable to allocate CCB"); |
| l2cu_reject_ble_connection (p_lcb, id, L2CAP_CONN_NO_RESOURCES); |
| break; |
| } |
| |
| /* validate the parameters */ |
| if (mtu < L2CAP_LE_MIN_MTU || mps < L2CAP_LE_MIN_MPS || mps > L2CAP_LE_MAX_MPS) |
| { |
| L2CAP_TRACE_ERROR ("L2CAP don't like the params"); |
| l2cu_reject_ble_connection (p_lcb, id, L2CAP_CONN_NO_RESOURCES); |
| break; |
| } |
| |
| p_ccb->remote_id = id; |
| p_ccb->p_rcb = p_rcb; |
| p_ccb->remote_cid = rcid; |
| |
| p_ccb->peer_conn_cfg.mtu = mtu; |
| p_ccb->peer_conn_cfg.mps = mps; |
| p_ccb->peer_conn_cfg.credits = initial_credit; |
| |
| p_ccb->tx_mps = mps; |
| p_ccb->ble_sdu = NULL; |
| p_ccb->ble_sdu_length = 0; |
| p_ccb->is_first_seg = true; |
| p_ccb->peer_cfg.fcr.mode = L2CAP_FCR_LE_COC_MODE; |
| |
| l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_REQ, &con_info); |
| break; |
| |
| case L2CAP_CMD_BLE_CREDIT_BASED_CONN_RES: |
| L2CAP_TRACE_DEBUG ("Recv L2CAP_CMD_BLE_CREDIT_BASED_CONN_RES"); |
| /* For all channels, see whose identifier matches this id */ |
| for (temp_p_ccb = p_lcb->ccb_queue.p_first_ccb; temp_p_ccb; temp_p_ccb = temp_p_ccb->p_next_ccb) |
| { |
| if (temp_p_ccb->local_id == id) |
| { |
| p_ccb = temp_p_ccb; |
| break; |
| } |
| } |
| if (p_ccb) |
| { |
| L2CAP_TRACE_DEBUG ("I remember the connection req"); |
| STREAM_TO_UINT16 (p_ccb->remote_cid, p); |
| STREAM_TO_UINT16 (p_ccb->peer_conn_cfg.mtu, p); |
| STREAM_TO_UINT16 (p_ccb->peer_conn_cfg.mps, p); |
| STREAM_TO_UINT16 (p_ccb->peer_conn_cfg.credits, p); |
| STREAM_TO_UINT16 (con_info.l2cap_result, p); |
| con_info.remote_cid = p_ccb->remote_cid; |
| |
| L2CAP_TRACE_DEBUG ("remote_cid = %d, " |
| "mtu = %d, " |
| "mps = %d, " |
| "initial_credit = %d, " |
| "con_info.l2cap_result = %d", |
| p_ccb->remote_cid, p_ccb->peer_conn_cfg.mtu, p_ccb->peer_conn_cfg.mps, |
| p_ccb->peer_conn_cfg.credits, con_info.l2cap_result); |
| |
| /* validate the parameters */ |
| if (p_ccb->peer_conn_cfg.mtu < L2CAP_LE_MIN_MTU || |
| p_ccb->peer_conn_cfg.mps < L2CAP_LE_MIN_MPS || |
| p_ccb->peer_conn_cfg.mps > L2CAP_LE_MAX_MPS) |
| { |
| L2CAP_TRACE_ERROR ("L2CAP don't like the params"); |
| con_info.l2cap_result = L2CAP_LE_NO_RESOURCES; |
| l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_NEG, &con_info); |
| break; |
| } |
| |
| p_ccb->tx_mps = p_ccb->peer_conn_cfg.mps; |
| p_ccb->ble_sdu = NULL; |
| p_ccb->ble_sdu_length = 0; |
| p_ccb->is_first_seg = true; |
| p_ccb->peer_cfg.fcr.mode = L2CAP_FCR_LE_COC_MODE; |
| |
| if (con_info.l2cap_result == L2CAP_LE_CONN_OK) |
| l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP, &con_info); |
| else |
| l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_NEG, &con_info); |
| } |
| else |
| { |
| L2CAP_TRACE_DEBUG ("I DO NOT remember the connection req"); |
| con_info.l2cap_result = L2CAP_LE_INVALID_SOURCE_CID; |
| l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_NEG, &con_info); |
| } |
| break; |
| |
| case L2CAP_CMD_BLE_FLOW_CTRL_CREDIT: |
| STREAM_TO_UINT16(lcid, p); |
| if((p_ccb = l2cu_find_ccb_by_remote_cid(p_lcb, lcid)) == NULL) |
| { |
| L2CAP_TRACE_DEBUG ("%s Credit received for unknown channel id %d", __func__, lcid); |
| break; |
| } |
| |
| STREAM_TO_UINT16(credit ,p); |
| l2c_csm_execute(p_ccb, L2CEVT_L2CAP_RECV_FLOW_CONTROL_CREDIT, &credit); |
| L2CAP_TRACE_DEBUG ("%s Credit received", __func__); |
| break; |
| |
| case L2CAP_CMD_DISC_REQ: |
| STREAM_TO_UINT16 (lcid, p); |
| STREAM_TO_UINT16 (rcid, p); |
| |
| if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL) |
| { |
| if (p_ccb->remote_cid == rcid) |
| { |
| p_ccb->remote_id = id; |
| l2c_csm_execute (p_ccb, L2CEVT_L2CAP_DISCONNECT_REQ, NULL); |
| } |
| } |
| else |
| l2cu_send_peer_disc_rsp (p_lcb, id, lcid, rcid); |
| |
| break; |
| |
| case L2CAP_CMD_DISC_RSP: |
| STREAM_TO_UINT16 (rcid, p); |
| STREAM_TO_UINT16 (lcid, p); |
| |
| if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL) |
| { |
| if ((p_ccb->remote_cid == rcid) && (p_ccb->local_id == id)) |
| l2c_csm_execute (p_ccb, L2CEVT_L2CAP_DISCONNECT_RSP, NULL); |
| } |
| break; |
| |
| default: |
| L2CAP_TRACE_WARNING ("L2CAP - LE - unknown cmd code: %d", cmd_code); |
| l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0); |
| break; |
| } |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_init_direct_conn |
| ** |
| ** Description This function is to initate a direct connection |
| ** |
| ** Returns true connection initiated, false otherwise. |
| ** |
| *******************************************************************************/ |
| bool l2cble_init_direct_conn (tL2C_LCB *p_lcb) |
| { |
| tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (p_lcb->remote_bd_addr); |
| tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb; |
| uint16_t scan_int; |
| uint16_t scan_win; |
| BD_ADDR peer_addr; |
| uint8_t peer_addr_type = BLE_ADDR_PUBLIC; |
| uint8_t own_addr_type = BLE_ADDR_PUBLIC; |
| |
| /* There can be only one BLE connection request outstanding at a time */ |
| if (p_dev_rec == NULL) |
| { |
| L2CAP_TRACE_WARNING ("unknown device, can not initate connection"); |
| return(false); |
| } |
| |
| scan_int = (p_cb->scan_int == BTM_BLE_SCAN_PARAM_UNDEF) ? BTM_BLE_SCAN_FAST_INT : p_cb->scan_int; |
| scan_win = (p_cb->scan_win == BTM_BLE_SCAN_PARAM_UNDEF) ? BTM_BLE_SCAN_FAST_WIN : p_cb->scan_win; |
| |
| peer_addr_type = p_lcb->ble_addr_type; |
| memcpy(peer_addr, p_lcb->remote_bd_addr, BD_ADDR_LEN); |
| |
| #if (BLE_PRIVACY_SPT == TRUE) |
| own_addr_type = btm_cb.ble_ctr_cb.privacy_mode ? BLE_ADDR_RANDOM : BLE_ADDR_PUBLIC; |
| if (p_dev_rec->ble.in_controller_list & BTM_RESOLVING_LIST_BIT) |
| { |
| if (btm_cb.ble_ctr_cb.privacy_mode >= BTM_PRIVACY_1_2) |
| own_addr_type |= BLE_ADDR_TYPE_ID_BIT; |
| |
| btm_ble_enable_resolving_list(BTM_BLE_RL_INIT); |
| btm_random_pseudo_to_identity_addr(peer_addr, &peer_addr_type); |
| } else { |
| btm_ble_disable_resolving_list(BTM_BLE_RL_INIT, true); |
| |
| // If we have a current RPA, use that instead. |
| if (!bdaddr_is_empty((const bt_bdaddr_t *)p_dev_rec->ble.cur_rand_addr)) { |
| memcpy(peer_addr, p_dev_rec->ble.cur_rand_addr, BD_ADDR_LEN); |
| } |
| } |
| #endif |
| |
| if (!btm_ble_topology_check(BTM_BLE_STATE_INIT)) |
| { |
| l2cu_release_lcb (p_lcb); |
| L2CAP_TRACE_ERROR("initate direct connection fail, topology limitation"); |
| return false; |
| } |
| |
| btsnd_hcic_ble_create_ll_conn(scan_int,/* uint16_t scan_int */ |
| scan_win, /* uint16_t scan_win */ |
| false, /* uint8_t white_list */ |
| peer_addr_type, /* uint8_t addr_type_peer */ |
| peer_addr, /* BD_ADDR bda_peer */ |
| own_addr_type, /* uint8_t addr_type_own */ |
| (uint16_t) ((p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ? |
| p_dev_rec->conn_params.min_conn_int : BTM_BLE_CONN_INT_MIN_DEF), /* uint16_t conn_int_min */ |
| (uint16_t) ((p_dev_rec->conn_params.max_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ? |
| p_dev_rec->conn_params.max_conn_int : BTM_BLE_CONN_INT_MAX_DEF), /* uint16_t conn_int_max */ |
| (uint16_t) ((p_dev_rec->conn_params.slave_latency != BTM_BLE_CONN_PARAM_UNDEF) ? |
| p_dev_rec->conn_params.slave_latency : BTM_BLE_CONN_SLAVE_LATENCY_DEF), /* uint16_t conn_latency */ |
| (uint16_t) ((p_dev_rec->conn_params.supervision_tout != BTM_BLE_CONN_PARAM_UNDEF) ? |
| p_dev_rec->conn_params.supervision_tout : BTM_BLE_CONN_TIMEOUT_DEF), /* conn_timeout */ |
| 0, /* uint16_t min_len */ |
| 0); /* uint16_t max_len */ |
| |
| p_lcb->link_state = LST_CONNECTING; |
| l2cb.is_ble_connecting = true; |
| memcpy (l2cb.ble_connecting_bda, p_lcb->remote_bd_addr, BD_ADDR_LEN); |
| alarm_set_on_queue(p_lcb->l2c_lcb_timer, |
| L2CAP_BLE_LINK_CONNECT_TIMEOUT_MS, |
| l2c_lcb_timer_timeout, p_lcb, |
| btu_general_alarm_queue); |
| btm_ble_set_conn_st (BLE_DIR_CONN); |
| |
| return (true); |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_create_conn |
| ** |
| ** Description This function initiates an acl connection via HCI |
| ** |
| ** Returns true if successful, false if connection not started. |
| ** |
| *******************************************************************************/ |
| bool l2cble_create_conn (tL2C_LCB *p_lcb) |
| { |
| tBTM_BLE_CONN_ST conn_st = btm_ble_get_conn_st(); |
| bool rt = false; |
| |
| /* There can be only one BLE connection request outstanding at a time */ |
| if (conn_st == BLE_CONN_IDLE) |
| { |
| rt = l2cble_init_direct_conn(p_lcb); |
| } |
| else |
| { |
| L2CAP_TRACE_WARNING ("L2CAP - LE - cannot start new connection at conn st: %d", conn_st); |
| |
| btm_ble_enqueue_direct_conn_req(p_lcb); |
| |
| if (conn_st == BLE_BG_CONN) |
| btm_ble_suspend_bg_conn(); |
| |
| rt = true; |
| } |
| return rt; |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2c_link_processs_ble_num_bufs |
| ** |
| ** Description This function is called when a "controller buffer size" |
| ** event is first received from the controller. It updates |
| ** the L2CAP values. |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2c_link_processs_ble_num_bufs (uint16_t num_lm_ble_bufs) |
| { |
| if (num_lm_ble_bufs == 0) |
| { |
| num_lm_ble_bufs = L2C_DEF_NUM_BLE_BUF_SHARED; |
| l2cb.num_lm_acl_bufs -= L2C_DEF_NUM_BLE_BUF_SHARED; |
| } |
| |
| l2cb.num_lm_ble_bufs = l2cb.controller_le_xmit_window = num_lm_ble_bufs; |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2c_ble_link_adjust_allocation |
| ** |
| ** Description This function is called when a link is created or removed |
| ** to calculate the amount of packets each link may send to |
| ** the HCI without an ack coming back. |
| ** |
| ** Currently, this is a simple allocation, dividing the |
| ** number of Controller Packets by the number of links. In |
| ** the future, QOS configuration should be examined. |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2c_ble_link_adjust_allocation (void) |
| { |
| uint16_t qq, yy, qq_remainder; |
| tL2C_LCB *p_lcb; |
| uint16_t hi_quota, low_quota; |
| uint16_t num_lowpri_links = 0; |
| uint16_t num_hipri_links = 0; |
| uint16_t controller_xmit_quota = l2cb.num_lm_ble_bufs; |
| uint16_t high_pri_link_quota = L2CAP_HIGH_PRI_MIN_XMIT_QUOTA_A; |
| |
| /* If no links active, reset buffer quotas and controller buffers */ |
| if (l2cb.num_ble_links_active == 0) |
| { |
| l2cb.controller_le_xmit_window = l2cb.num_lm_ble_bufs; |
| l2cb.ble_round_robin_quota = l2cb.ble_round_robin_unacked = 0; |
| return; |
| } |
| |
| /* First, count the links */ |
| for (yy = 0, p_lcb = &l2cb.lcb_pool[0]; yy < MAX_L2CAP_LINKS; yy++, p_lcb++) |
| { |
| if (p_lcb->in_use && p_lcb->transport == BT_TRANSPORT_LE) |
| { |
| if (p_lcb->acl_priority == L2CAP_PRIORITY_HIGH) |
| num_hipri_links++; |
| else |
| num_lowpri_links++; |
| } |
| } |
| |
| /* now adjust high priority link quota */ |
| low_quota = num_lowpri_links ? 1 : 0; |
| while ( (num_hipri_links * high_pri_link_quota + low_quota) > controller_xmit_quota ) |
| high_pri_link_quota--; |
| |
| |
| /* Work out the xmit quota and buffer quota high and low priorities */ |
| hi_quota = num_hipri_links * high_pri_link_quota; |
| low_quota = (hi_quota < controller_xmit_quota) ? controller_xmit_quota - hi_quota : 1; |
| |
| /* Work out and save the HCI xmit quota for each low priority link */ |
| |
| /* If each low priority link cannot have at least one buffer */ |
| if (num_lowpri_links > low_quota) |
| { |
| l2cb.ble_round_robin_quota = low_quota; |
| qq = qq_remainder = 0; |
| } |
| /* If each low priority link can have at least one buffer */ |
| else if (num_lowpri_links > 0) |
| { |
| l2cb.ble_round_robin_quota = 0; |
| l2cb.ble_round_robin_unacked = 0; |
| qq = low_quota / num_lowpri_links; |
| qq_remainder = low_quota % num_lowpri_links; |
| } |
| /* If no low priority link */ |
| else |
| { |
| l2cb.ble_round_robin_quota = 0; |
| l2cb.ble_round_robin_unacked = 0; |
| qq = qq_remainder = 0; |
| } |
| L2CAP_TRACE_EVENT ("l2c_ble_link_adjust_allocation num_hipri: %u num_lowpri: %u low_quota: %u round_robin_quota: %u qq: %u", |
| num_hipri_links, num_lowpri_links, low_quota, |
| l2cb.ble_round_robin_quota, qq); |
| |
| /* Now, assign the quotas to each link */ |
| for (yy = 0, p_lcb = &l2cb.lcb_pool[0]; yy < MAX_L2CAP_LINKS; yy++, p_lcb++) |
| { |
| if (p_lcb->in_use && p_lcb->transport == BT_TRANSPORT_LE) |
| { |
| if (p_lcb->acl_priority == L2CAP_PRIORITY_HIGH) |
| { |
| p_lcb->link_xmit_quota = high_pri_link_quota; |
| } |
| else |
| { |
| /* Safety check in case we switched to round-robin with something outstanding */ |
| /* if sent_not_acked is added into round_robin_unacked then don't add it again */ |
| /* l2cap keeps updating sent_not_acked for exiting from round robin */ |
| if (( p_lcb->link_xmit_quota > 0 )&&( qq == 0 )) |
| l2cb.ble_round_robin_unacked += p_lcb->sent_not_acked; |
| |
| p_lcb->link_xmit_quota = qq; |
| if (qq_remainder > 0) |
| { |
| p_lcb->link_xmit_quota++; |
| qq_remainder--; |
| } |
| } |
| |
| L2CAP_TRACE_EVENT("l2c_ble_link_adjust_allocation LCB %d Priority: %d XmitQuota: %d", |
| yy, p_lcb->acl_priority, p_lcb->link_xmit_quota); |
| |
| L2CAP_TRACE_EVENT(" SentNotAcked: %d RRUnacked: %d", |
| p_lcb->sent_not_acked, l2cb.round_robin_unacked); |
| |
| /* There is a special case where we have readjusted the link quotas and */ |
| /* this link may have sent anything but some other link sent packets so */ |
| /* so we may need a timer to kick off this link's transmissions. */ |
| if ( (p_lcb->link_state == LST_CONNECTED) |
| && (!list_is_empty(p_lcb->link_xmit_data_q)) |
| && (p_lcb->sent_not_acked < p_lcb->link_xmit_quota) ) { |
| alarm_set_on_queue(p_lcb->l2c_lcb_timer, |
| L2CAP_LINK_FLOW_CONTROL_TIMEOUT_MS, |
| l2c_lcb_timer_timeout, p_lcb, |
| btu_general_alarm_queue); |
| } |
| } |
| } |
| } |
| |
| #if (BLE_LLT_INCLUDED == TRUE) |
| /******************************************************************************* |
| ** |
| ** Function l2cble_process_rc_param_request_evt |
| ** |
| ** Description process LE Remote Connection Parameter Request Event. |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2cble_process_rc_param_request_evt(uint16_t handle, uint16_t int_min, uint16_t int_max, |
| uint16_t latency, uint16_t timeout) |
| { |
| tL2C_LCB *p_lcb = l2cu_find_lcb_by_handle (handle); |
| |
| if (p_lcb != NULL) |
| { |
| p_lcb->min_interval = int_min; |
| p_lcb->max_interval = int_max; |
| p_lcb->latency = latency; |
| p_lcb->timeout = timeout; |
| |
| /* if update is enabled, always accept connection parameter update */ |
| if ((p_lcb->conn_update_mask & L2C_BLE_CONN_UPDATE_DISABLE) == 0) |
| { |
| btsnd_hcic_ble_rc_param_req_reply(handle, int_min, int_max, latency, timeout, 0, 0); |
| } |
| else |
| { |
| L2CAP_TRACE_EVENT ("L2CAP - LE - update currently disabled"); |
| p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM; |
| btsnd_hcic_ble_rc_param_req_neg_reply (handle,HCI_ERR_UNACCEPT_CONN_INTERVAL); |
| } |
| |
| } |
| else |
| { |
| L2CAP_TRACE_WARNING("No link to update connection parameter") |
| } |
| } |
| #endif |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_update_data_length |
| ** |
| ** Description This function update link tx data length if applicable |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2cble_update_data_length(tL2C_LCB *p_lcb) |
| { |
| uint16_t tx_mtu = 0; |
| uint16_t i = 0; |
| |
| L2CAP_TRACE_DEBUG("%s", __func__); |
| |
| /* See if we have a link control block for the connection */ |
| if (p_lcb == NULL) |
| return; |
| |
| for (i = 0; i < L2CAP_NUM_FIXED_CHNLS; i++) |
| { |
| if (i + L2CAP_FIRST_FIXED_CHNL != L2CAP_BLE_SIGNALLING_CID) |
| { |
| if ((p_lcb->p_fixed_ccbs[i] != NULL) && |
| (tx_mtu < (p_lcb->p_fixed_ccbs[i]->tx_data_len + L2CAP_PKT_OVERHEAD))) |
| tx_mtu = p_lcb->p_fixed_ccbs[i]->tx_data_len + L2CAP_PKT_OVERHEAD; |
| } |
| } |
| |
| if (tx_mtu > BTM_BLE_DATA_SIZE_MAX) |
| tx_mtu = BTM_BLE_DATA_SIZE_MAX; |
| |
| /* update TX data length if changed */ |
| if (p_lcb->tx_data_len != tx_mtu) |
| BTM_SetBleDataLength(p_lcb->remote_bd_addr, tx_mtu); |
| |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_process_data_length_change_evt |
| ** |
| ** Description This function process the data length change event |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2cble_process_data_length_change_event(uint16_t handle, uint16_t tx_data_len, uint16_t rx_data_len) |
| { |
| tL2C_LCB *p_lcb = l2cu_find_lcb_by_handle(handle); |
| |
| L2CAP_TRACE_DEBUG("%s TX data len = %d", __func__, tx_data_len); |
| if (p_lcb == NULL) |
| return; |
| |
| if (tx_data_len > 0) |
| p_lcb->tx_data_len = tx_data_len; |
| |
| /* ignore rx_data len for now */ |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_set_fixed_channel_tx_data_length |
| ** |
| ** Description This function update max fixed channel tx data length if applicable |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2cble_set_fixed_channel_tx_data_length(BD_ADDR remote_bda, uint16_t fix_cid, uint16_t tx_mtu) |
| { |
| tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr(remote_bda, BT_TRANSPORT_LE); |
| uint16_t cid = fix_cid - L2CAP_FIRST_FIXED_CHNL; |
| |
| L2CAP_TRACE_DEBUG("%s TX MTU = %d", __func__, tx_mtu); |
| |
| if (!controller_get_interface()->supports_ble_packet_extension()) |
| { |
| L2CAP_TRACE_WARNING("%s, request not supported", __func__); |
| return; |
| } |
| |
| /* See if we have a link control block for the connection */ |
| if (p_lcb == NULL) |
| return; |
| |
| if (p_lcb->p_fixed_ccbs[cid] != NULL) |
| { |
| if (tx_mtu > BTM_BLE_DATA_SIZE_MAX) |
| tx_mtu = BTM_BLE_DATA_SIZE_MAX; |
| |
| p_lcb->p_fixed_ccbs[cid]->tx_data_len = tx_mtu; |
| } |
| |
| l2cble_update_data_length(p_lcb); |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_credit_based_conn_req |
| ** |
| ** Description This function sends LE Credit Based Connection Request for |
| ** LE connection oriented channels. |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2cble_credit_based_conn_req (tL2C_CCB *p_ccb) |
| { |
| if (!p_ccb) |
| return; |
| |
| if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE) |
| { |
| L2CAP_TRACE_WARNING ("LE link doesn't exist"); |
| return; |
| } |
| |
| l2cu_send_peer_ble_credit_based_conn_req (p_ccb); |
| return; |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_credit_based_conn_res |
| ** |
| ** Description This function sends LE Credit Based Connection Response for |
| ** LE connection oriented channels. |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2cble_credit_based_conn_res (tL2C_CCB *p_ccb, uint16_t result) |
| { |
| if (!p_ccb) |
| return; |
| |
| if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE) |
| { |
| L2CAP_TRACE_WARNING ("LE link doesn't exist"); |
| return; |
| } |
| |
| l2cu_send_peer_ble_credit_based_conn_res (p_ccb, result); |
| return; |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_send_flow_control_credit |
| ** |
| ** Description This function sends flow control credits for |
| ** LE connection oriented channels. |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2cble_send_flow_control_credit(tL2C_CCB *p_ccb, uint16_t credit_value) |
| { |
| if (!p_ccb) |
| return; |
| |
| if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE) |
| { |
| L2CAP_TRACE_WARNING ("LE link doesn't exist"); |
| return; |
| } |
| |
| l2cu_send_peer_ble_flow_control_credit(p_ccb, credit_value); |
| return; |
| |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_send_peer_disc_req |
| ** |
| ** Description This function sends disconnect request |
| ** to the peer LE device |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2cble_send_peer_disc_req(tL2C_CCB *p_ccb) |
| { |
| L2CAP_TRACE_DEBUG ("%s",__func__); |
| if (!p_ccb) |
| return; |
| |
| if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE) |
| { |
| L2CAP_TRACE_WARNING ("LE link doesn't exist"); |
| return; |
| } |
| |
| l2cu_send_peer_ble_credit_based_disconn_req(p_ccb); |
| return; |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2cble_sec_comp |
| ** |
| ** Description This function is called when security procedure for an LE COC |
| ** link is done |
| ** |
| ** Returns void |
| ** |
| *******************************************************************************/ |
| void l2cble_sec_comp(BD_ADDR p_bda, tBT_TRANSPORT transport, void *p_ref_data, uint8_t status) |
| { |
| tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr(p_bda, BT_TRANSPORT_LE); |
| tL2CAP_SEC_DATA *p_buf = NULL; |
| uint8_t sec_flag; |
| uint8_t sec_act; |
| |
| if (!p_lcb) |
| { |
| L2CAP_TRACE_WARNING ("%s security complete for unknown device", __func__); |
| return; |
| } |
| |
| sec_act = p_lcb->sec_act; |
| p_lcb->sec_act = 0; |
| |
| if (!fixed_queue_is_empty(p_lcb->le_sec_pending_q)) |
| { |
| p_buf = (tL2CAP_SEC_DATA*) fixed_queue_dequeue(p_lcb->le_sec_pending_q); |
| if (!p_buf) |
| { |
| L2CAP_TRACE_WARNING ("%s Security complete for request not initiated from L2CAP", |
| __func__); |
| return; |
| } |
| |
| if (status != BTM_SUCCESS) |
| { |
| (*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status); |
| } |
| else |
| { |
| if (sec_act == BTM_SEC_ENCRYPT_MITM) |
| { |
| BTM_GetSecurityFlagsByTransport(p_bda, &sec_flag, transport); |
| if (sec_flag & BTM_SEC_FLAG_LKEY_AUTHED) |
| (*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status); |
| else |
| { |
| L2CAP_TRACE_DEBUG ("%s MITM Protection Not present", __func__); |
| (*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, |
| BTM_FAILED_ON_SECURITY); |
| } |
| } |
| else |
| { |
| L2CAP_TRACE_DEBUG ("%s MITM Protection not required sec_act = %d", |
| __func__, p_lcb->sec_act); |
| |
| (*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status); |
| } |
| } |
| } |
| else |
| { |
| L2CAP_TRACE_WARNING ("%s Security complete for request not initiated from L2CAP", __func__); |
| return; |
| } |
| osi_free(p_buf); |
| |
| while (!fixed_queue_is_empty(p_lcb->le_sec_pending_q)) |
| { |
| p_buf = (tL2CAP_SEC_DATA*) fixed_queue_dequeue(p_lcb->le_sec_pending_q); |
| |
| if (status != BTM_SUCCESS) |
| (*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status); |
| else |
| l2ble_sec_access_req(p_bda, p_buf->psm, p_buf->is_originator, |
| p_buf->p_callback, p_buf->p_ref_data); |
| |
| osi_free(p_buf); |
| } |
| } |
| |
| /******************************************************************************* |
| ** |
| ** Function l2ble_sec_access_req |
| ** |
| ** Description This function is called by LE COC link to meet the |
| ** security requirement for the link |
| ** |
| ** Returns true - security procedures are started |
| ** false - failure |
| ** |
| *******************************************************************************/ |
| bool l2ble_sec_access_req(BD_ADDR bd_addr, uint16_t psm, bool is_originator, tL2CAP_SEC_CBACK *p_callback, void *p_ref_data) |
| { |
| L2CAP_TRACE_DEBUG ("%s", __func__); |
| bool status; |
| tL2C_LCB *p_lcb = NULL; |
| |
| if (!p_callback) |
| { |
| L2CAP_TRACE_ERROR("%s No callback function", __func__); |
| return false; |
| } |
| |
| p_lcb = l2cu_find_lcb_by_bd_addr(bd_addr, BT_TRANSPORT_LE); |
| |
| if (!p_lcb) |
| { |
| L2CAP_TRACE_ERROR ("%s Security check for unknown device", __func__); |
| p_callback(bd_addr, BT_TRANSPORT_LE, p_ref_data, BTM_UNKNOWN_ADDR); |
| return false; |
| } |
| |
| tL2CAP_SEC_DATA *p_buf = (tL2CAP_SEC_DATA*) osi_malloc((uint16_t)sizeof(tL2CAP_SEC_DATA)); |
| if (!p_buf) |
| { |
| p_callback(bd_addr, BT_TRANSPORT_LE, p_ref_data, BTM_NO_RESOURCES); |
| return false; |
| } |
| |
| p_buf->psm = psm; |
| p_buf->is_originator = is_originator; |
| p_buf->p_callback = p_callback; |
| p_buf->p_ref_data = p_ref_data; |
| fixed_queue_enqueue(p_lcb->le_sec_pending_q, p_buf); |
| status = btm_ble_start_sec_check(bd_addr, psm, is_originator, &l2cble_sec_comp, p_ref_data); |
| |
| return status; |
| } |
| #endif /* (BLE_INCLUDED == TRUE) */ |
