| /****************************************************************************** |
| * |
| * Copyright (C) 1999-2012 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 functions relating to link management. A "link" |
| * is a connection between this device and another device. Only ACL links |
| * are managed. |
| * |
| ******************************************************************************/ |
| |
| #include <base/logging.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "bt_common.h" |
| #include "bt_types.h" |
| #include "bt_utils.h" |
| #include "btm_api.h" |
| #include "btm_int.h" |
| #include "btu.h" |
| #include "device/include/controller.h" |
| #include "hcimsgs.h" |
| #include "l2c_api.h" |
| #include "l2c_int.h" |
| #include "l2cdefs.h" |
| #include "osi/include/osi.h" |
| |
| static bool l2c_link_send_to_lower(tL2C_LCB* p_lcb, BT_HDR* p_buf, |
| tL2C_TX_COMPLETE_CB_INFO* p_cbi); |
| |
| /******************************************************************************* |
| * |
| * Function l2c_link_hci_conn_req |
| * |
| * Description This function is called when an HCI Connection Request |
| * event is received. |
| * |
| * Returns true, if accept conn |
| * |
| ******************************************************************************/ |
| bool l2c_link_hci_conn_req(const RawAddress& bd_addr) { |
| tL2C_LCB* p_lcb; |
| tL2C_LCB* p_lcb_cur; |
| int xx; |
| bool no_links; |
| |
| /* See if we have a link control block for the remote device */ |
| p_lcb = l2cu_find_lcb_by_bd_addr(bd_addr, BT_TRANSPORT_BR_EDR); |
| |
| /* If we don't have one, create one and accept the connection. */ |
| if (!p_lcb) { |
| p_lcb = l2cu_allocate_lcb(bd_addr, false, BT_TRANSPORT_BR_EDR); |
| if (!p_lcb) { |
| btsnd_hcic_reject_conn(bd_addr, HCI_ERR_HOST_REJECT_RESOURCES); |
| L2CAP_TRACE_ERROR("L2CAP failed to allocate LCB"); |
| return false; |
| } |
| |
| no_links = true; |
| |
| /* If we already have connection, accept as a master */ |
| for (xx = 0, p_lcb_cur = &l2cb.lcb_pool[0]; xx < MAX_L2CAP_LINKS; |
| xx++, p_lcb_cur++) { |
| if (p_lcb_cur == p_lcb) continue; |
| |
| if (p_lcb_cur->in_use) { |
| no_links = false; |
| p_lcb->link_role = HCI_ROLE_MASTER; |
| break; |
| } |
| } |
| |
| if (no_links) { |
| if (!btm_dev_support_switch(bd_addr)) |
| p_lcb->link_role = HCI_ROLE_SLAVE; |
| else |
| p_lcb->link_role = l2cu_get_conn_role(p_lcb); |
| } |
| |
| /* Tell the other side we accept the connection */ |
| btsnd_hcic_accept_conn(bd_addr, p_lcb->link_role); |
| |
| p_lcb->link_state = LST_CONNECTING; |
| |
| /* Start a timer waiting for connect complete */ |
| alarm_set_on_mloop(p_lcb->l2c_lcb_timer, L2CAP_LINK_CONNECT_TIMEOUT_MS, |
| l2c_lcb_timer_timeout, p_lcb); |
| return (true); |
| } |
| |
| /* We already had a link control block to the guy. Check what state it is in |
| */ |
| if ((p_lcb->link_state == LST_CONNECTING) || |
| (p_lcb->link_state == LST_CONNECT_HOLDING)) { |
| /* Connection collision. Accept the connection anyways. */ |
| |
| if (!btm_dev_support_switch(bd_addr)) |
| p_lcb->link_role = HCI_ROLE_SLAVE; |
| else |
| p_lcb->link_role = l2cu_get_conn_role(p_lcb); |
| |
| btsnd_hcic_accept_conn(bd_addr, p_lcb->link_role); |
| |
| p_lcb->link_state = LST_CONNECTING; |
| return (true); |
| } else if (p_lcb->link_state == LST_DISCONNECTING) { |
| /* In disconnecting state, reject the connection. */ |
| btsnd_hcic_reject_conn(bd_addr, HCI_ERR_HOST_REJECT_DEVICE); |
| } else { |
| L2CAP_TRACE_ERROR( |
| "L2CAP got conn_req while connected (state:%d). Reject it", |
| p_lcb->link_state); |
| /* Reject the connection with ACL Connection Already exist reason */ |
| btsnd_hcic_reject_conn(bd_addr, HCI_ERR_CONNECTION_EXISTS); |
| } |
| return (false); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_link_hci_conn_comp |
| * |
| * Description This function is called when an HCI Connection Complete |
| * event is received. |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| bool l2c_link_hci_conn_comp(uint8_t status, uint16_t handle, |
| const RawAddress& p_bda) { |
| tL2C_CONN_INFO ci; |
| tL2C_LCB* p_lcb; |
| tL2C_CCB* p_ccb; |
| tBTM_SEC_DEV_REC* p_dev_info = NULL; |
| |
| btm_acl_update_busy_level(BTM_BLI_PAGE_DONE_EVT); |
| |
| /* Save the parameters */ |
| ci.status = status; |
| ci.bd_addr = p_bda; |
| |
| /* See if we have a link control block for the remote device */ |
| p_lcb = l2cu_find_lcb_by_bd_addr(ci.bd_addr, BT_TRANSPORT_BR_EDR); |
| |
| /* If we don't have one, this is an error */ |
| if (!p_lcb) { |
| L2CAP_TRACE_WARNING("L2CAP got conn_comp for unknown BD_ADDR"); |
| return (false); |
| } |
| |
| if (p_lcb->link_state != LST_CONNECTING) { |
| L2CAP_TRACE_ERROR("L2CAP got conn_comp in bad state: %d status: 0x%d", |
| p_lcb->link_state, status); |
| |
| if (status != HCI_SUCCESS) l2c_link_hci_disc_comp(p_lcb->handle, status); |
| |
| return (false); |
| } |
| |
| /* Save the handle */ |
| p_lcb->handle = handle; |
| |
| if (ci.status == HCI_SUCCESS) { |
| /* Connected OK. Change state to connected */ |
| p_lcb->link_state = LST_CONNECTED; |
| |
| /* Get the peer information if the l2cap flow-control/rtrans is supported */ |
| l2cu_send_peer_info_req(p_lcb, L2CAP_EXTENDED_FEATURES_INFO_TYPE); |
| |
| /* Tell BTM Acl management about the link */ |
| p_dev_info = btm_find_dev(p_bda); |
| if (p_dev_info != NULL) |
| btm_acl_created(ci.bd_addr, p_dev_info->dev_class, |
| p_dev_info->sec_bd_name, handle, p_lcb->link_role, |
| BT_TRANSPORT_BR_EDR); |
| else |
| btm_acl_created(ci.bd_addr, NULL, NULL, handle, p_lcb->link_role, |
| BT_TRANSPORT_BR_EDR); |
| |
| BTM_SetLinkSuperTout(ci.bd_addr, btm_cb.btm_def_link_super_tout); |
| |
| /* If dedicated bonding do not process any further */ |
| if (p_lcb->is_bonding) { |
| if (l2cu_start_post_bond_timer(handle)) return (true); |
| } |
| |
| /* Update the timeouts in the hold queue */ |
| l2c_process_held_packets(false); |
| |
| alarm_cancel(p_lcb->l2c_lcb_timer); |
| |
| /* 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) { |
| l2c_csm_execute(p_ccb, L2CEVT_LP_CONNECT_CFM, &ci); |
| } |
| |
| if (p_lcb->p_echo_rsp_cb) { |
| l2cu_send_peer_echo_req(p_lcb, NULL, 0); |
| alarm_set_on_mloop(p_lcb->l2c_lcb_timer, L2CAP_ECHO_RSP_TIMEOUT_MS, |
| l2c_lcb_timer_timeout, p_lcb); |
| } else if (!p_lcb->ccb_queue.p_first_ccb) { |
| period_ms_t timeout_ms = L2CAP_LINK_STARTUP_TOUT * 1000; |
| alarm_set_on_mloop(p_lcb->l2c_lcb_timer, timeout_ms, |
| l2c_lcb_timer_timeout, p_lcb); |
| } |
| } |
| /* Max number of acl connections. */ |
| /* If there's an lcb disconnecting set this one to holding */ |
| else if ((ci.status == HCI_ERR_MAX_NUM_OF_CONNECTIONS) && |
| l2cu_lcb_disconnecting()) { |
| p_lcb->link_state = LST_CONNECT_HOLDING; |
| p_lcb->handle = HCI_INVALID_HANDLE; |
| } else { |
| /* Just in case app decides to try again in the callback context */ |
| p_lcb->link_state = LST_DISCONNECTING; |
| |
| /* Connection failed. For all channels, send the event through */ |
| /* their FSMs. The CCBs should remove themselves from the LCB */ |
| for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb;) { |
| tL2C_CCB* pn = p_ccb->p_next_ccb; |
| |
| l2c_csm_execute(p_ccb, L2CEVT_LP_CONNECT_CFM_NEG, &ci); |
| |
| p_ccb = pn; |
| } |
| |
| p_lcb->disc_reason = status; |
| /* Release the LCB */ |
| if (p_lcb->ccb_queue.p_first_ccb == NULL) |
| l2cu_release_lcb(p_lcb); |
| else /* there are any CCBs remaining */ |
| { |
| if (ci.status == HCI_ERR_CONNECTION_EXISTS) { |
| /* we are in collision situation, wait for connecttion request from |
| * controller */ |
| p_lcb->link_state = LST_CONNECTING; |
| } else { |
| l2cu_create_conn(p_lcb, BT_TRANSPORT_BR_EDR); |
| } |
| } |
| } |
| return (true); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_link_sec_comp |
| * |
| * Description This function is called when required security procedures |
| * are completed. |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void l2c_link_sec_comp(const RawAddress* p_bda, |
| UNUSED_ATTR tBT_TRANSPORT transport, void* p_ref_data, |
| uint8_t status) { |
| l2c_link_sec_comp2(*p_bda, transport, p_ref_data, status); |
| } |
| |
| void l2c_link_sec_comp2(const RawAddress& p_bda, |
| UNUSED_ATTR tBT_TRANSPORT transport, void* p_ref_data, |
| uint8_t status) { |
| tL2C_CONN_INFO ci; |
| tL2C_LCB* p_lcb; |
| tL2C_CCB* p_ccb; |
| tL2C_CCB* p_next_ccb; |
| uint8_t event; |
| |
| L2CAP_TRACE_DEBUG("l2c_link_sec_comp: %d, 0x%x", status, p_ref_data); |
| |
| if (status == BTM_SUCCESS_NO_SECURITY) status = BTM_SUCCESS; |
| |
| /* Save the parameters */ |
| ci.status = status; |
| ci.bd_addr = p_bda; |
| |
| p_lcb = l2cu_find_lcb_by_bd_addr(p_bda, transport); |
| |
| /* If we don't have one, this is an error */ |
| if (!p_lcb) { |
| L2CAP_TRACE_WARNING("L2CAP got sec_comp for unknown BD_ADDR"); |
| return; |
| } |
| |
| /* Match p_ccb with p_ref_data returned by sec manager */ |
| for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb; p_ccb = p_next_ccb) { |
| p_next_ccb = p_ccb->p_next_ccb; |
| |
| if (p_ccb == p_ref_data) { |
| switch (status) { |
| case BTM_SUCCESS: |
| event = L2CEVT_SEC_COMP; |
| break; |
| |
| case BTM_DELAY_CHECK: |
| /* start a timer - encryption change not received before L2CAP connect |
| * req */ |
| alarm_set_on_mloop(p_ccb->l2c_ccb_timer, |
| L2CAP_DELAY_CHECK_SM4_TIMEOUT_MS, |
| l2c_ccb_timer_timeout, p_ccb); |
| return; |
| |
| default: |
| event = L2CEVT_SEC_COMP_NEG; |
| } |
| l2c_csm_execute(p_ccb, event, &ci); |
| break; |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_link_hci_disc_comp |
| * |
| * Description This function is called when an HCI Disconnect Complete |
| * event is received. |
| * |
| * Returns true if the link is known about, else false |
| * |
| ******************************************************************************/ |
| bool l2c_link_hci_disc_comp(uint16_t handle, uint8_t reason) { |
| tL2C_LCB* p_lcb; |
| tL2C_CCB* p_ccb; |
| bool status = true; |
| bool lcb_is_free = true; |
| tBT_TRANSPORT transport = BT_TRANSPORT_BR_EDR; |
| |
| /* See if we have a link control block for the connection */ |
| p_lcb = l2cu_find_lcb_by_handle(handle); |
| |
| /* If we don't have one, maybe an SCO link. Send to MM */ |
| if (!p_lcb) { |
| status = false; |
| } else { |
| /* There can be a case when we rejected PIN code authentication */ |
| /* otherwise save a new reason */ |
| if (btm_cb.acl_disc_reason != HCI_ERR_HOST_REJECT_SECURITY) |
| btm_cb.acl_disc_reason = reason; |
| |
| p_lcb->disc_reason = btm_cb.acl_disc_reason; |
| |
| /* Just in case app decides to try again in the callback context */ |
| p_lcb->link_state = LST_DISCONNECTING; |
| |
| /* Check for BLE and handle that differently */ |
| if (p_lcb->transport == BT_TRANSPORT_LE) |
| btm_ble_update_link_topology_mask(p_lcb->link_role, false); |
| /* Link is disconnected. For all channels, send the event through */ |
| /* their FSMs. The CCBs should remove themselves from the LCB */ |
| for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb;) { |
| tL2C_CCB* pn = p_ccb->p_next_ccb; |
| |
| /* Keep connect pending control block (if exists) |
| * Possible Race condition when a reconnect occurs |
| * on the channel during a disconnect of link. This |
| * ccb will be automatically retried after link disconnect |
| * arrives |
| */ |
| if (p_ccb != p_lcb->p_pending_ccb) { |
| l2c_csm_execute(p_ccb, L2CEVT_LP_DISCONNECT_IND, &reason); |
| } |
| p_ccb = pn; |
| } |
| |
| #if (BTM_SCO_INCLUDED == TRUE) |
| if (p_lcb->transport == BT_TRANSPORT_BR_EDR) |
| /* Tell SCO management to drop any SCOs on this ACL */ |
| btm_sco_acl_removed(&p_lcb->remote_bd_addr); |
| #endif |
| |
| /* If waiting for disconnect and reconnect is pending start the reconnect |
| now |
| race condition where layer above issued connect request on link that was |
| disconnecting |
| */ |
| if (p_lcb->ccb_queue.p_first_ccb != NULL || p_lcb->p_pending_ccb) { |
| L2CAP_TRACE_DEBUG( |
| "l2c_link_hci_disc_comp: Restarting pending ACL request"); |
| transport = p_lcb->transport; |
| /* for LE link, always drop and re-open to ensure to get LE remote feature |
| */ |
| if (p_lcb->transport == BT_TRANSPORT_LE) { |
| l2cb.is_ble_connecting = false; |
| btm_acl_removed(p_lcb->remote_bd_addr, p_lcb->transport); |
| /* Release any held buffers */ |
| BT_HDR* p_buf; |
| while (!list_is_empty(p_lcb->link_xmit_data_q)) { |
| p_buf = static_cast<BT_HDR*>(list_front(p_lcb->link_xmit_data_q)); |
| list_remove(p_lcb->link_xmit_data_q, p_buf); |
| osi_free(p_buf); |
| } |
| } else { |
| #if (L2CAP_NUM_FIXED_CHNLS > 0) |
| /* If we are going to re-use the LCB without dropping it, release all |
| fixed channels |
| here */ |
| int xx; |
| for (xx = 0; xx < L2CAP_NUM_FIXED_CHNLS; xx++) { |
| if (p_lcb->p_fixed_ccbs[xx] && |
| p_lcb->p_fixed_ccbs[xx] != p_lcb->p_pending_ccb) { |
| (*l2cb.fixed_reg[xx].pL2CA_FixedConn_Cb)( |
| xx + L2CAP_FIRST_FIXED_CHNL, p_lcb->remote_bd_addr, false, |
| p_lcb->disc_reason, p_lcb->transport); |
| if (p_lcb->p_fixed_ccbs[xx] == NULL) { |
| L2CAP_TRACE_ERROR( |
| "%s: unexpected p_fixed_ccbs[%d] is NULL remote_bd_addr = %s " |
| "p_lcb = %p in_use = %d link_state = %d handle = %d " |
| "link_role = %d is_bonding = %d disc_reason = %d transport = " |
| "%d", |
| __func__, xx, p_lcb->remote_bd_addr.ToString().c_str(), p_lcb, |
| p_lcb->in_use, p_lcb->link_state, p_lcb->handle, |
| p_lcb->link_role, p_lcb->is_bonding, p_lcb->disc_reason, |
| p_lcb->transport); |
| } |
| CHECK(p_lcb->p_fixed_ccbs[xx] != NULL); |
| l2cu_release_ccb(p_lcb->p_fixed_ccbs[xx]); |
| |
| p_lcb->p_fixed_ccbs[xx] = NULL; |
| } |
| } |
| #endif |
| } |
| if (l2cu_create_conn(p_lcb, transport)) |
| lcb_is_free = false; /* still using this lcb */ |
| } |
| |
| p_lcb->p_pending_ccb = NULL; |
| |
| /* Release the LCB */ |
| if (lcb_is_free) l2cu_release_lcb(p_lcb); |
| } |
| |
| /* Now that we have a free acl connection, see if any lcbs are pending */ |
| if (lcb_is_free && |
| ((p_lcb = l2cu_find_lcb_by_state(LST_CONNECT_HOLDING)) != NULL)) { |
| /* we found one-- create a connection */ |
| l2cu_create_conn(p_lcb, BT_TRANSPORT_BR_EDR); |
| } |
| |
| return status; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_link_hci_qos_violation |
| * |
| * Description This function is called when an HCI QOS Violation |
| * event is received. |
| * |
| * Returns true if the link is known about, else false |
| * |
| ******************************************************************************/ |
| bool l2c_link_hci_qos_violation(uint16_t handle) { |
| tL2C_LCB* p_lcb; |
| tL2C_CCB* p_ccb; |
| |
| /* See if we have a link control block for the connection */ |
| p_lcb = l2cu_find_lcb_by_handle(handle); |
| |
| /* If we don't have one, maybe an SCO link. */ |
| if (!p_lcb) return (false); |
| |
| /* For all channels, tell the upper layer about it */ |
| for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb; p_ccb = p_ccb->p_next_ccb) { |
| if (p_ccb->p_rcb->api.pL2CA_QoSViolationInd_Cb) |
| l2c_csm_execute(p_ccb, L2CEVT_LP_QOS_VIOLATION_IND, NULL); |
| } |
| |
| return (true); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_link_timeout |
| * |
| * Description This function is called when a link timer expires |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void l2c_link_timeout(tL2C_LCB* p_lcb) { |
| tL2C_CCB* p_ccb; |
| tBTM_STATUS rc; |
| |
| L2CAP_TRACE_EVENT( |
| "L2CAP - l2c_link_timeout() link state %d first CCB %p is_bonding:%d", |
| p_lcb->link_state, p_lcb->ccb_queue.p_first_ccb, p_lcb->is_bonding); |
| |
| /* If link was connecting or disconnecting, clear all channels and drop the |
| * LCB */ |
| if ((p_lcb->link_state == LST_CONNECTING_WAIT_SWITCH) || |
| (p_lcb->link_state == LST_CONNECTING) || |
| (p_lcb->link_state == LST_CONNECT_HOLDING) || |
| (p_lcb->link_state == LST_DISCONNECTING)) { |
| p_lcb->p_pending_ccb = NULL; |
| |
| /* For all channels, send a disconnect indication event through */ |
| /* their FSMs. The CCBs should remove themselves from the LCB */ |
| for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb;) { |
| tL2C_CCB* pn = p_ccb->p_next_ccb; |
| |
| l2c_csm_execute(p_ccb, L2CEVT_LP_DISCONNECT_IND, NULL); |
| |
| p_ccb = pn; |
| } |
| if (p_lcb->link_state == LST_CONNECTING && l2cb.is_ble_connecting == true) { |
| L2CA_CancelBleConnectReq(l2cb.ble_connecting_bda); |
| } |
| /* Release the LCB */ |
| l2cu_release_lcb(p_lcb); |
| } |
| |
| /* If link is connected, check for inactivity timeout */ |
| if (p_lcb->link_state == LST_CONNECTED) { |
| /* Check for ping outstanding */ |
| if (p_lcb->p_echo_rsp_cb) { |
| tL2CA_ECHO_RSP_CB* p_cb = p_lcb->p_echo_rsp_cb; |
| |
| /* Zero out the callback in case app immediately calls us again */ |
| p_lcb->p_echo_rsp_cb = NULL; |
| |
| (*p_cb)(L2CAP_PING_RESULT_NO_RESP); |
| |
| L2CAP_TRACE_WARNING("L2CAP - ping timeout"); |
| |
| /* For all channels, send a disconnect indication event through */ |
| /* their FSMs. The CCBs should remove themselves from the LCB */ |
| for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb;) { |
| tL2C_CCB* pn = p_ccb->p_next_ccb; |
| |
| l2c_csm_execute(p_ccb, L2CEVT_LP_DISCONNECT_IND, NULL); |
| |
| p_ccb = pn; |
| } |
| } |
| |
| /* If no channels in use, drop the link. */ |
| if (!p_lcb->ccb_queue.p_first_ccb) { |
| period_ms_t timeout_ms; |
| bool start_timeout = true; |
| |
| rc = btm_sec_disconnect(p_lcb->handle, HCI_ERR_PEER_USER); |
| |
| if (rc == BTM_CMD_STORED) { |
| /* Security Manager will take care of disconnecting, state will be |
| * updated at that time */ |
| start_timeout = false; |
| } else if (rc == BTM_CMD_STARTED) { |
| p_lcb->link_state = LST_DISCONNECTING; |
| timeout_ms = L2CAP_LINK_DISCONNECT_TIMEOUT_MS; |
| } else if (rc == BTM_SUCCESS) { |
| l2cu_process_fixed_disc_cback(p_lcb); |
| /* BTM SEC will make sure that link is release (probably after pairing |
| * is done) */ |
| p_lcb->link_state = LST_DISCONNECTING; |
| start_timeout = false; |
| } else if (rc == BTM_BUSY) { |
| /* BTM is still executing security process. Let lcb stay as connected */ |
| start_timeout = false; |
| } else if (p_lcb->is_bonding) { |
| btsnd_hcic_disconnect(p_lcb->handle, HCI_ERR_PEER_USER); |
| l2cu_process_fixed_disc_cback(p_lcb); |
| p_lcb->link_state = LST_DISCONNECTING; |
| timeout_ms = L2CAP_LINK_DISCONNECT_TIMEOUT_MS; |
| } else { |
| /* probably no buffer to send disconnect */ |
| timeout_ms = BT_1SEC_TIMEOUT_MS; |
| } |
| |
| if (start_timeout) { |
| alarm_set_on_mloop(p_lcb->l2c_lcb_timer, timeout_ms, |
| l2c_lcb_timer_timeout, p_lcb); |
| } |
| } else { |
| /* Check in case we were flow controlled */ |
| l2c_link_check_send_pkts(p_lcb, NULL, NULL); |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_info_resp_timer_timeout |
| * |
| * Description This function is called when an info request times out |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void l2c_info_resp_timer_timeout(void* data) { |
| tL2C_LCB* p_lcb = (tL2C_LCB*)data; |
| tL2C_CCB* p_ccb; |
| tL2C_CONN_INFO ci; |
| |
| /* If we timed out waiting for info response, just continue using basic if |
| * allowed */ |
| if (p_lcb->w4_info_rsp) { |
| /* If waiting for security complete, restart the info response timer */ |
| 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_ORIG_W4_SEC_COMP) || |
| (p_ccb->chnl_state == CST_TERM_W4_SEC_COMP)) { |
| alarm_set_on_mloop(p_lcb->info_resp_timer, |
| L2CAP_WAIT_INFO_RSP_TIMEOUT_MS, |
| l2c_info_resp_timer_timeout, p_lcb); |
| return; |
| } |
| } |
| |
| p_lcb->w4_info_rsp = false; |
| |
| /* If link is in process of being brought up */ |
| if ((p_lcb->link_state != LST_DISCONNECTED) && |
| (p_lcb->link_state != LST_DISCONNECTING)) { |
| /* Notify active channels that peer info is finished */ |
| if (p_lcb->ccb_queue.p_first_ccb) { |
| ci.status = HCI_SUCCESS; |
| ci.bd_addr = p_lcb->remote_bd_addr; |
| |
| for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb; |
| p_ccb = p_ccb->p_next_ccb) { |
| l2c_csm_execute(p_ccb, L2CEVT_L2CAP_INFO_RSP, &ci); |
| } |
| } |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_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_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_acl_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_links_active == 0) { |
| l2cb.controller_xmit_window = l2cb.num_lm_acl_bufs; |
| l2cb.round_robin_quota = l2cb.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) { |
| 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.round_robin_quota = low_quota; |
| qq = qq_remainder = 1; |
| } |
| /* If each low priority link can have at least one buffer */ |
| else if (num_lowpri_links > 0) { |
| l2cb.round_robin_quota = 0; |
| l2cb.round_robin_unacked = 0; |
| qq = low_quota / num_lowpri_links; |
| qq_remainder = low_quota % num_lowpri_links; |
| } |
| /* If no low priority link */ |
| else { |
| l2cb.round_robin_quota = 0; |
| l2cb.round_robin_unacked = 0; |
| qq = qq_remainder = 1; |
| } |
| |
| L2CAP_TRACE_EVENT( |
| "l2c_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.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) { |
| 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.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_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_mloop(p_lcb->l2c_lcb_timer, |
| L2CAP_LINK_FLOW_CONTROL_TIMEOUT_MS, |
| l2c_lcb_timer_timeout, p_lcb); |
| } |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_link_adjust_chnl_allocation |
| * |
| * Description This function is called to calculate the amount of packets |
| * each non-F&EC channel may have outstanding. |
| * |
| * Currently, this is a simple allocation, dividing the number |
| * of packets allocated to the link by the number of channels. |
| * In the future, QOS configuration should be examined. |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void l2c_link_adjust_chnl_allocation(void) { |
| uint8_t xx; |
| |
| L2CAP_TRACE_DEBUG("%s", __func__); |
| |
| /* assign buffer quota to each channel based on its data rate requirement */ |
| for (xx = 0; xx < MAX_L2CAP_CHANNELS; xx++) { |
| tL2C_CCB* p_ccb = l2cb.ccb_pool + xx; |
| |
| if (!p_ccb->in_use) continue; |
| |
| tL2CAP_CHNL_DATA_RATE data_rate = p_ccb->tx_data_rate + p_ccb->rx_data_rate; |
| p_ccb->buff_quota = L2CAP_CBB_DEFAULT_DATA_RATE_BUFF_QUOTA * data_rate; |
| L2CAP_TRACE_EVENT( |
| "CID:0x%04x FCR Mode:%u Priority:%u TxDataRate:%u RxDataRate:%u " |
| "Quota:%u", |
| p_ccb->local_cid, p_ccb->peer_cfg.fcr.mode, p_ccb->ccb_priority, |
| p_ccb->tx_data_rate, p_ccb->rx_data_rate, p_ccb->buff_quota); |
| |
| /* quota may be change so check congestion */ |
| l2cu_check_channel_congestion(p_ccb); |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_link_processs_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_num_bufs(uint16_t num_lm_acl_bufs) { |
| l2cb.num_lm_acl_bufs = l2cb.controller_xmit_window = num_lm_acl_bufs; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_link_pkts_rcvd |
| * |
| * Description This function is called from the HCI transport when it is |
| * time to send a "Host ready for packets" command. This is |
| * only when host to controller flow control is used. It fills |
| * in the arrays of numbers of packets and handles. |
| * |
| * Returns count of number of entries filled in |
| * |
| ******************************************************************************/ |
| uint8_t l2c_link_pkts_rcvd(UNUSED_ATTR uint16_t* num_pkts, |
| UNUSED_ATTR uint16_t* handles) { |
| uint8_t num_found = 0; |
| |
| return (num_found); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_link_role_changed |
| * |
| * Description This function is called whan a link's master/slave role |
| * change event is received. It simply updates the link control |
| * block. |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void l2c_link_role_changed(const RawAddress* bd_addr, uint8_t new_role, |
| uint8_t hci_status) { |
| tL2C_LCB* p_lcb; |
| int xx; |
| |
| /* Make sure not called from HCI Command Status (bd_addr and new_role are |
| * invalid) */ |
| if (bd_addr) { |
| /* If here came form hci role change event */ |
| p_lcb = l2cu_find_lcb_by_bd_addr(*bd_addr, BT_TRANSPORT_BR_EDR); |
| if (p_lcb) { |
| p_lcb->link_role = new_role; |
| |
| /* Reset high priority link if needed */ |
| if (hci_status == HCI_SUCCESS) |
| l2cu_set_acl_priority(*bd_addr, p_lcb->acl_priority, true); |
| } |
| } |
| |
| /* Check if any LCB was waiting for switch to be completed */ |
| for (xx = 0, p_lcb = &l2cb.lcb_pool[0]; xx < MAX_L2CAP_LINKS; xx++, p_lcb++) { |
| if ((p_lcb->in_use) && (p_lcb->link_state == LST_CONNECTING_WAIT_SWITCH)) { |
| l2cu_create_conn_after_switch(p_lcb); |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_pin_code_request |
| * |
| * Description This function is called whan a pin-code request is received |
| * on a connection. If there are no channels active yet on the |
| * link, it extends the link first connection timer. Make sure |
| * that inactivity timer is not extended if PIN code happens |
| * to be after last ccb released. |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void l2c_pin_code_request(const RawAddress& bd_addr) { |
| tL2C_LCB* p_lcb = l2cu_find_lcb_by_bd_addr(bd_addr, BT_TRANSPORT_BR_EDR); |
| |
| if ((p_lcb) && (!p_lcb->ccb_queue.p_first_ccb)) { |
| alarm_set_on_mloop(p_lcb->l2c_lcb_timer, L2CAP_LINK_CONNECT_EXT_TIMEOUT_MS, |
| l2c_lcb_timer_timeout, p_lcb); |
| } |
| } |
| |
| #if (L2CAP_WAKE_PARKED_LINK == TRUE) |
| /******************************************************************************* |
| * |
| * Function l2c_link_check_power_mode |
| * |
| * Description This function is called to check power mode. |
| * |
| * Returns true if link is going to be active from park |
| * false if nothing to send or not in park mode |
| * |
| ******************************************************************************/ |
| bool l2c_link_check_power_mode(tL2C_LCB* p_lcb) { |
| tBTM_PM_MODE mode; |
| tL2C_CCB* p_ccb; |
| bool need_to_active = false; |
| |
| /* |
| * We only switch park to active only if we have unsent packets |
| */ |
| if (list_is_empty(p_lcb->link_xmit_data_q)) { |
| for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb; |
| p_ccb = p_ccb->p_next_ccb) { |
| if (!fixed_queue_is_empty(p_ccb->xmit_hold_q)) { |
| need_to_active = true; |
| break; |
| } |
| } |
| } else |
| need_to_active = true; |
| |
| /* if we have packets to send */ |
| if (need_to_active) { |
| /* check power mode */ |
| if (BTM_ReadPowerMode(p_lcb->remote_bd_addr, &mode) == BTM_SUCCESS) { |
| if (mode == BTM_PM_STS_PENDING) { |
| L2CAP_TRACE_DEBUG("LCB(0x%x) is in PM pending state", p_lcb->handle); |
| |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| #endif /* L2CAP_WAKE_PARKED_LINK == TRUE) */ |
| |
| /******************************************************************************* |
| * |
| * Function l2c_link_check_send_pkts |
| * |
| * Description This function is called to check if it can send packets |
| * to the Host Controller. It may be passed the address of |
| * a packet to send. |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void l2c_link_check_send_pkts(tL2C_LCB* p_lcb, tL2C_CCB* p_ccb, BT_HDR* p_buf) { |
| int xx; |
| bool single_write = false; |
| |
| /* Save the channel ID for faster counting */ |
| if (p_buf) { |
| if (p_ccb != NULL) { |
| p_buf->event = p_ccb->local_cid; |
| single_write = true; |
| } else |
| p_buf->event = 0; |
| |
| p_buf->layer_specific = 0; |
| list_append(p_lcb->link_xmit_data_q, p_buf); |
| |
| if (p_lcb->link_xmit_quota == 0) { |
| if (p_lcb->transport == BT_TRANSPORT_LE) |
| l2cb.ble_check_round_robin = true; |
| else |
| l2cb.check_round_robin = true; |
| } |
| } |
| |
| /* If this is called from uncongested callback context break recursive |
| *calling. |
| ** This LCB will be served when receiving number of completed packet event. |
| */ |
| if (l2cb.is_cong_cback_context) return; |
| |
| /* If we are in a scenario where there are not enough buffers for each link to |
| ** have at least 1, then do a round-robin for all the LCBs |
| */ |
| if ((p_lcb == NULL) || (p_lcb->link_xmit_quota == 0)) { |
| if (p_lcb == NULL) |
| p_lcb = l2cb.lcb_pool; |
| else if (!single_write) |
| p_lcb++; |
| |
| /* Loop through, starting at the next */ |
| for (xx = 0; xx < MAX_L2CAP_LINKS; xx++, p_lcb++) { |
| /* Check for wraparound */ |
| if (p_lcb == &l2cb.lcb_pool[MAX_L2CAP_LINKS]) p_lcb = &l2cb.lcb_pool[0]; |
| |
| /* If controller window is full, nothing to do */ |
| if (((l2cb.controller_xmit_window == 0 || |
| (l2cb.round_robin_unacked >= l2cb.round_robin_quota)) && |
| (p_lcb->transport == BT_TRANSPORT_BR_EDR)) || |
| (p_lcb->transport == BT_TRANSPORT_LE && |
| (l2cb.ble_round_robin_unacked >= l2cb.ble_round_robin_quota || |
| l2cb.controller_le_xmit_window == 0))) |
| continue; |
| |
| if ((!p_lcb->in_use) || (p_lcb->partial_segment_being_sent) || |
| (p_lcb->link_state != LST_CONNECTED) || |
| (p_lcb->link_xmit_quota != 0) || (L2C_LINK_CHECK_POWER_MODE(p_lcb))) |
| continue; |
| |
| /* See if we can send anything from the Link Queue */ |
| if (!list_is_empty(p_lcb->link_xmit_data_q)) { |
| p_buf = (BT_HDR*)list_front(p_lcb->link_xmit_data_q); |
| list_remove(p_lcb->link_xmit_data_q, p_buf); |
| l2c_link_send_to_lower(p_lcb, p_buf, NULL); |
| } else if (single_write) { |
| /* If only doing one write, break out */ |
| break; |
| } |
| /* If nothing on the link queue, check the channel queue */ |
| else { |
| tL2C_TX_COMPLETE_CB_INFO cbi; |
| p_buf = l2cu_get_next_buffer_to_send(p_lcb, &cbi); |
| if (p_buf != NULL) { |
| l2c_link_send_to_lower(p_lcb, p_buf, &cbi); |
| } |
| } |
| } |
| |
| /* If we finished without using up our quota, no need for a safety check */ |
| if ((l2cb.controller_xmit_window > 0) && |
| (l2cb.round_robin_unacked < l2cb.round_robin_quota) && |
| (p_lcb->transport == BT_TRANSPORT_BR_EDR)) |
| l2cb.check_round_robin = false; |
| |
| if ((l2cb.controller_le_xmit_window > 0) && |
| (l2cb.ble_round_robin_unacked < l2cb.ble_round_robin_quota) && |
| (p_lcb->transport == BT_TRANSPORT_LE)) |
| l2cb.ble_check_round_robin = false; |
| } else /* if this is not round-robin service */ |
| { |
| /* If a partial segment is being sent, can't send anything else */ |
| if ((p_lcb->partial_segment_being_sent) || |
| (p_lcb->link_state != LST_CONNECTED) || |
| (L2C_LINK_CHECK_POWER_MODE(p_lcb))) |
| return; |
| |
| /* See if we can send anything from the link queue */ |
| while (((l2cb.controller_xmit_window != 0 && |
| (p_lcb->transport == BT_TRANSPORT_BR_EDR)) || |
| (l2cb.controller_le_xmit_window != 0 && |
| (p_lcb->transport == BT_TRANSPORT_LE))) && |
| (p_lcb->sent_not_acked < p_lcb->link_xmit_quota)) { |
| if (list_is_empty(p_lcb->link_xmit_data_q)) break; |
| |
| p_buf = (BT_HDR*)list_front(p_lcb->link_xmit_data_q); |
| list_remove(p_lcb->link_xmit_data_q, p_buf); |
| if (!l2c_link_send_to_lower(p_lcb, p_buf, NULL)) break; |
| } |
| |
| if (!single_write) { |
| /* See if we can send anything for any channel */ |
| while (((l2cb.controller_xmit_window != 0 && |
| (p_lcb->transport == BT_TRANSPORT_BR_EDR)) || |
| (l2cb.controller_le_xmit_window != 0 && |
| (p_lcb->transport == BT_TRANSPORT_LE))) && |
| (p_lcb->sent_not_acked < p_lcb->link_xmit_quota)) { |
| tL2C_TX_COMPLETE_CB_INFO cbi; |
| p_buf = l2cu_get_next_buffer_to_send(p_lcb, &cbi); |
| if (p_buf == NULL) break; |
| |
| if (!l2c_link_send_to_lower(p_lcb, p_buf, &cbi)) break; |
| } |
| } |
| |
| /* 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 ((!list_is_empty(p_lcb->link_xmit_data_q)) && |
| (p_lcb->sent_not_acked < p_lcb->link_xmit_quota)) { |
| alarm_set_on_mloop(p_lcb->l2c_lcb_timer, |
| L2CAP_LINK_FLOW_CONTROL_TIMEOUT_MS, |
| l2c_lcb_timer_timeout, p_lcb); |
| } |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_link_send_to_lower |
| * |
| * Description This function queues the buffer for HCI transmission |
| * |
| * Returns true for success, false for fail |
| * |
| ******************************************************************************/ |
| static bool l2c_link_send_to_lower(tL2C_LCB* p_lcb, BT_HDR* p_buf, |
| tL2C_TX_COMPLETE_CB_INFO* p_cbi) { |
| uint16_t num_segs; |
| uint16_t xmit_window, acl_data_size; |
| const controller_t* controller = controller_get_interface(); |
| |
| if ((p_buf->len <= controller->get_acl_packet_size_classic() && |
| (p_lcb->transport == BT_TRANSPORT_BR_EDR)) || |
| ((p_lcb->transport == BT_TRANSPORT_LE) && |
| (p_buf->len <= controller->get_acl_packet_size_ble()))) { |
| if (p_lcb->link_xmit_quota == 0) { |
| if (p_lcb->transport == BT_TRANSPORT_LE) |
| l2cb.ble_round_robin_unacked++; |
| else |
| l2cb.round_robin_unacked++; |
| } |
| p_lcb->sent_not_acked++; |
| p_buf->layer_specific = 0; |
| |
| if (p_lcb->transport == BT_TRANSPORT_LE) { |
| l2cb.controller_le_xmit_window--; |
| bte_main_hci_send( |
| p_buf, (uint16_t)(BT_EVT_TO_LM_HCI_ACL | LOCAL_BLE_CONTROLLER_ID)); |
| } else { |
| l2cb.controller_xmit_window--; |
| bte_main_hci_send(p_buf, BT_EVT_TO_LM_HCI_ACL); |
| } |
| } else { |
| if (p_lcb->transport == BT_TRANSPORT_LE) { |
| acl_data_size = controller->get_acl_data_size_ble(); |
| xmit_window = l2cb.controller_le_xmit_window; |
| |
| } else { |
| acl_data_size = controller->get_acl_data_size_classic(); |
| xmit_window = l2cb.controller_xmit_window; |
| } |
| num_segs = (p_buf->len - HCI_DATA_PREAMBLE_SIZE + acl_data_size - 1) / |
| acl_data_size; |
| |
| /* If doing round-robin, then only 1 segment each time */ |
| if (p_lcb->link_xmit_quota == 0) { |
| num_segs = 1; |
| p_lcb->partial_segment_being_sent = true; |
| } else { |
| /* Multi-segment packet. Make sure it can fit */ |
| if (num_segs > xmit_window) { |
| num_segs = xmit_window; |
| p_lcb->partial_segment_being_sent = true; |
| } |
| |
| if (num_segs > (p_lcb->link_xmit_quota - p_lcb->sent_not_acked)) { |
| num_segs = (p_lcb->link_xmit_quota - p_lcb->sent_not_acked); |
| p_lcb->partial_segment_being_sent = true; |
| } |
| } |
| |
| p_buf->layer_specific = num_segs; |
| if (p_lcb->transport == BT_TRANSPORT_LE) { |
| l2cb.controller_le_xmit_window -= num_segs; |
| if (p_lcb->link_xmit_quota == 0) l2cb.ble_round_robin_unacked += num_segs; |
| } else { |
| l2cb.controller_xmit_window -= num_segs; |
| |
| if (p_lcb->link_xmit_quota == 0) l2cb.round_robin_unacked += num_segs; |
| } |
| |
| p_lcb->sent_not_acked += num_segs; |
| if (p_lcb->transport == BT_TRANSPORT_LE) { |
| bte_main_hci_send( |
| p_buf, (uint16_t)(BT_EVT_TO_LM_HCI_ACL | LOCAL_BLE_CONTROLLER_ID)); |
| } else { |
| bte_main_hci_send(p_buf, BT_EVT_TO_LM_HCI_ACL); |
| } |
| } |
| |
| #if (L2CAP_HCI_FLOW_CONTROL_DEBUG == TRUE) |
| if (p_lcb->transport == BT_TRANSPORT_LE) { |
| L2CAP_TRACE_DEBUG( |
| "TotalWin=%d,Hndl=0x%x,Quota=%d,Unack=%d,RRQuota=%d,RRUnack=%d", |
| l2cb.controller_le_xmit_window, p_lcb->handle, p_lcb->link_xmit_quota, |
| p_lcb->sent_not_acked, l2cb.ble_round_robin_quota, |
| l2cb.ble_round_robin_unacked); |
| } else { |
| L2CAP_TRACE_DEBUG( |
| "TotalWin=%d,Hndl=0x%x,Quota=%d,Unack=%d,RRQuota=%d,RRUnack=%d", |
| l2cb.controller_xmit_window, p_lcb->handle, p_lcb->link_xmit_quota, |
| p_lcb->sent_not_acked, l2cb.round_robin_quota, |
| l2cb.round_robin_unacked); |
| } |
| #endif |
| |
| if (p_cbi) l2cu_tx_complete(p_cbi); |
| |
| return true; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_link_process_num_completed_pkts |
| * |
| * Description This function is called when a "number-of-completed-packets" |
| * event is received from the controller. It updates all the |
| * LCB transmit counts. |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void l2c_link_process_num_completed_pkts(uint8_t* p) { |
| uint8_t num_handles, xx; |
| uint16_t handle; |
| uint16_t num_sent; |
| tL2C_LCB* p_lcb; |
| |
| STREAM_TO_UINT8(num_handles, p); |
| |
| for (xx = 0; xx < num_handles; xx++) { |
| STREAM_TO_UINT16(handle, p); |
| STREAM_TO_UINT16(num_sent, p); |
| |
| p_lcb = l2cu_find_lcb_by_handle(handle); |
| |
| /* Callback for number of completed packet event */ |
| /* Originally designed for [3DSG] */ |
| if ((p_lcb != NULL) && (p_lcb->p_nocp_cb)) { |
| L2CAP_TRACE_DEBUG("L2CAP - calling NoCP callback"); |
| (*p_lcb->p_nocp_cb)(p_lcb->remote_bd_addr); |
| } |
| |
| if (p_lcb) { |
| if (p_lcb && (p_lcb->transport == BT_TRANSPORT_LE)) |
| l2cb.controller_le_xmit_window += num_sent; |
| else { |
| /* Maintain the total window to the controller */ |
| l2cb.controller_xmit_window += num_sent; |
| } |
| /* If doing round-robin, adjust communal counts */ |
| if (p_lcb->link_xmit_quota == 0) { |
| if (p_lcb->transport == BT_TRANSPORT_LE) { |
| /* Don't go negative */ |
| if (l2cb.ble_round_robin_unacked > num_sent) |
| l2cb.ble_round_robin_unacked -= num_sent; |
| else |
| l2cb.ble_round_robin_unacked = 0; |
| } else { |
| /* Don't go negative */ |
| if (l2cb.round_robin_unacked > num_sent) |
| l2cb.round_robin_unacked -= num_sent; |
| else |
| l2cb.round_robin_unacked = 0; |
| } |
| } |
| |
| /* Don't go negative */ |
| if (p_lcb->sent_not_acked > num_sent) |
| p_lcb->sent_not_acked -= num_sent; |
| else |
| p_lcb->sent_not_acked = 0; |
| |
| l2c_link_check_send_pkts(p_lcb, NULL, NULL); |
| |
| /* If we were doing round-robin for low priority links, check 'em */ |
| if ((p_lcb->acl_priority == L2CAP_PRIORITY_HIGH) && |
| (l2cb.check_round_robin) && |
| (l2cb.round_robin_unacked < l2cb.round_robin_quota)) { |
| l2c_link_check_send_pkts(NULL, NULL, NULL); |
| } |
| if ((p_lcb->transport == BT_TRANSPORT_LE) && |
| (p_lcb->acl_priority == L2CAP_PRIORITY_HIGH) && |
| ((l2cb.ble_check_round_robin) && |
| (l2cb.ble_round_robin_unacked < l2cb.ble_round_robin_quota))) { |
| l2c_link_check_send_pkts(NULL, NULL, NULL); |
| } |
| } |
| |
| #if (L2CAP_HCI_FLOW_CONTROL_DEBUG == TRUE) |
| if (p_lcb) { |
| if (p_lcb->transport == BT_TRANSPORT_LE) { |
| L2CAP_TRACE_DEBUG( |
| "TotalWin=%d,LinkUnack(0x%x)=%d,RRCheck=%d,RRUnack=%d", |
| l2cb.controller_le_xmit_window, p_lcb->handle, |
| p_lcb->sent_not_acked, l2cb.ble_check_round_robin, |
| l2cb.ble_round_robin_unacked); |
| } else { |
| L2CAP_TRACE_DEBUG( |
| "TotalWin=%d,LinkUnack(0x%x)=%d,RRCheck=%d,RRUnack=%d", |
| l2cb.controller_xmit_window, p_lcb->handle, p_lcb->sent_not_acked, |
| l2cb.check_round_robin, l2cb.round_robin_unacked); |
| } |
| } else { |
| L2CAP_TRACE_DEBUG( |
| "TotalWin=%d LE_Win: %d, Handle=0x%x, RRCheck=%d, RRUnack=%d", |
| l2cb.controller_xmit_window, l2cb.controller_le_xmit_window, handle, |
| l2cb.ble_check_round_robin, l2cb.ble_round_robin_unacked); |
| } |
| #endif |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function l2c_link_segments_xmitted |
| * |
| * Description This function is called from the HCI Interface when an ACL |
| * data packet segment is transmitted. |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| void l2c_link_segments_xmitted(BT_HDR* p_msg) { |
| uint8_t* p = (uint8_t*)(p_msg + 1) + p_msg->offset; |
| uint16_t handle; |
| tL2C_LCB* p_lcb; |
| |
| /* Extract the handle */ |
| STREAM_TO_UINT16(handle, p); |
| handle = HCID_GET_HANDLE(handle); |
| |
| /* Find the LCB based on the handle */ |
| p_lcb = l2cu_find_lcb_by_handle(handle); |
| if (p_lcb == NULL) { |
| L2CAP_TRACE_WARNING("L2CAP - rcvd segment complete, unknown handle: %d", |
| handle); |
| osi_free(p_msg); |
| return; |
| } |
| |
| if (p_lcb->link_state == LST_CONNECTED) { |
| /* Enqueue the buffer to the head of the transmit queue, and see */ |
| /* if we can transmit anything more. */ |
| list_prepend(p_lcb->link_xmit_data_q, p_msg); |
| |
| p_lcb->partial_segment_being_sent = false; |
| |
| l2c_link_check_send_pkts(p_lcb, NULL, NULL); |
| } else |
| osi_free(p_msg); |
| } |
