/****************************************************************************** * * 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" #if (BLE_INCLUDED == TRUE) 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 ** *******************************************************************************/ BOOLEAN 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 ("L2CA_CancelBleConnectReq - no connection pending"); return(FALSE); } if (memcmp (rem_bda, l2cb.ble_connecting_bda, BD_ADDR_LEN)) { L2CAP_TRACE_WARNING ("L2CA_CancelBleConnectReq - different BDA Connecting: %08x%04x Cancel: %08x%04x", (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]); return(FALSE); } if (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_ACL_IS_CONNECTED(rem_bda))) { 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); } else return(FALSE); } /******************************************************************************* ** ** Function L2CA_UpdateBleConnParams ** ** Description Update BLE connection parameters. ** ** Parameters: BD Address of remote ** ** Return value: TRUE if update started ** *******************************************************************************/ BOOLEAN L2CA_UpdateBleConnParams (BD_ADDR rem_bda, UINT16 min_int, UINT16 max_int, UINT16 latency, UINT16 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 ** *******************************************************************************/ BOOLEAN L2CA_EnableUpdateBleConnParams (BD_ADDR rem_bda, BOOLEAN enable) { 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",__FUNCTION__, (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)", __FUNCTION__, (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 L2CA_GetBleConnRole (BD_ADDR bd_addr) { UINT8 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 L2CA_GetDisconnectReason (BD_ADDR remote_bda, tBT_TRANSPORT transport) { tL2C_LCB *p_lcb; UINT16 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; } /******************************************************************************* ** ** 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) ; 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); } } /******************************************************************************* ** ** 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 handle, BD_ADDR bda, tBLE_ADDR_TYPE type, UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout) { int i; 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; } btu_stop_timer(&p_lcb->timer_entry); /* 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; /* 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) && ((conn_interval < p_dev_rec->conn_params.min_conn_int && p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) || (conn_interval > p_dev_rec->conn_params.max_conn_int) || (conn_latency > p_dev_rec->conn_params.slave_latency) || (conn_timeout > p_dev_rec->conn_params.supervision_tout))) { L2CAP_TRACE_ERROR ("upd_ll_conn_params: HANDLE=%d min_conn_int=%d max_conn_int=%d slave_latency=%d supervision_tout=%d", 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 (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); } /* 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 handle, BD_ADDR bda, tBLE_ADDR_TYPE type, UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout) { int i; tL2C_LCB *p_lcb; tBTM_SEC_DEV_REC *p_dev_rec; UNUSED(type); UNUSED(conn_interval); UNUSED(conn_latency); UNUSED(conn_timeout); /* 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 handle, UINT8 role, BD_ADDR bda, tBLE_ADDR_TYPE type, UINT16 conn_interval, UINT16 conn_latency, UINT16 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 min_conn_int, max_conn_int, slave_latency, supervision_tout; tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev(p_lcb->remote_bd_addr); tACL_CONN *p_acl_cb = btm_bda_to_acl(p_lcb->remote_bd_addr, BT_TRANSPORT_LE); 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 (defined BLE_LLT_INCLUDED) && (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 (defined BLE_LLT_INCLUDED) && (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 handle, UINT8 status) { tL2C_LCB *p_lcb; L2CAP_TRACE_DEBUG("l2cble_process_conn_update_evt"); /* See if we have a link control block for the remote device */ p_lcb = l2cu_find_lcb_by_handle(handle); if (!p_lcb) { L2CAP_TRACE_WARNING("l2cble_process_conn_update_evt: Invalid handle: %d", handle); return; } p_lcb->conn_update_mask &= ~L2C_BLE_UPDATE_PENDING; if (status != HCI_SUCCESS) { L2CAP_TRACE_WARNING("l2cble_process_conn_update_evt: Error status: %d", status); } l2cble_start_conn_update(p_lcb); L2CAP_TRACE_DEBUG("l2cble_process_conn_update_evt: conn_update_mask=%d", 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 *p, UINT16 pkt_len) { UINT8 *p_pkt_end; UINT8 cmd_code, id; UINT16 cmd_len; UINT16 min_interval, max_interval, latency, timeout; 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: case L2CAP_CMD_ECHO_RSP: case L2CAP_CMD_INFO_RSP: p += 2; break; case L2CAP_CMD_ECHO_REQ: 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; 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; 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); return; } } /******************************************************************************* ** ** Function l2cble_init_direct_conn ** ** Description This function is to initate a direct connection ** ** Returns TRUE connection initiated, FALSE otherwise. ** *******************************************************************************/ BOOLEAN 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 scan_int; UINT16 scan_win; BD_ADDR peer_addr; UINT8 peer_addr_type = BLE_ADDR_PUBLIC; UINT8 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 ( (defined BLE_PRIVACY_SPT) && (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); #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; } if (!btsnd_hcic_ble_create_ll_conn (scan_int,/* UINT16 scan_int */ scan_win, /* UINT16 scan_win */ FALSE, /* UINT8 white_list */ peer_addr_type, /* UINT8 addr_type_peer */ peer_addr, /* BD_ADDR bda_peer */ own_addr_type, /* UINT8 addr_type_own */ (UINT16) ((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 conn_int_min */ (UINT16) ((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 conn_int_max */ (UINT16) ((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 conn_latency */ (UINT16) ((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 min_len */ 0)) /* UINT16 max_len */ { l2cu_release_lcb (p_lcb); L2CAP_TRACE_ERROR("initate direct connection fail, no resources"); return (FALSE); } else { p_lcb->link_state = LST_CONNECTING; l2cb.is_ble_connecting = TRUE; memcpy (l2cb.ble_connecting_bda, p_lcb->remote_bd_addr, BD_ADDR_LEN); btu_start_timer (&p_lcb->timer_entry, BTU_TTYPE_L2CAP_LINK, L2CAP_BLE_LINK_CONNECT_TOUT); 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. ** *******************************************************************************/ BOOLEAN l2cble_create_conn (tL2C_LCB *p_lcb) { tBTM_BLE_CONN_ST conn_st = btm_ble_get_conn_st(); BOOLEAN 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 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 qq, yy, qq_remainder; tL2C_LCB *p_lcb; UINT16 hi_quota, low_quota; UINT16 num_lowpri_links = 0; UINT16 num_hipri_links = 0; UINT16 controller_xmit_quota = l2cb.num_lm_ble_bufs; UINT16 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) ) btu_start_timer (&p_lcb->timer_entry, BTU_TTYPE_L2CAP_LINK, L2CAP_LINK_FLOW_CONTROL_TOUT); } } } #if (defined BLE_LLT_INCLUDED) && (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 handle, UINT16 int_min, UINT16 int_max, UINT16 latency, UINT16 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 tx_mtu = 0; UINT16 i = 0; L2CAP_TRACE_DEBUG("%s", __FUNCTION__); /* 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 handle, UINT16 tx_data_len, UINT16 rx_data_len) { tL2C_LCB *p_lcb = l2cu_find_lcb_by_handle(handle); L2CAP_TRACE_DEBUG("%s TX data len = %d", __FUNCTION__, 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 fix_cid, UINT16 tx_mtu) { tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr(remote_bda, BT_TRANSPORT_LE); UINT16 cid = fix_cid - L2CAP_FIRST_FIXED_CHNL; L2CAP_TRACE_DEBUG("%s TX MTU = %d", __FUNCTION__, tx_mtu); if (!controller_get_interface()->supports_ble_packet_extension()) { L2CAP_TRACE_WARNING("%s, request not supported", __FUNCTION__); 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); } #endif /* (BLE_INCLUDED == TRUE) */