1432 lines
54 KiB
C++
1432 lines
54 KiB
C++
/******************************************************************************
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*
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* Copyright (C) 1999-2012 Broadcom Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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/******************************************************************************
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*
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* This file contains the L2CAP channel state machine
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*
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******************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "bt_common.h"
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#include "bt_target.h"
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#include "btm_int.h"
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#include "btu.h"
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#include "hcidefs.h"
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#include "hcimsgs.h"
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#include "l2c_int.h"
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#include "l2cdefs.h"
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/******************************************************************************/
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/* L O C A L F U N C T I O N P R O T O T Y P E S */
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/******************************************************************************/
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static void l2c_csm_closed(tL2C_CCB* p_ccb, uint16_t event, void* p_data);
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static void l2c_csm_orig_w4_sec_comp(tL2C_CCB* p_ccb, uint16_t event,
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void* p_data);
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static void l2c_csm_term_w4_sec_comp(tL2C_CCB* p_ccb, uint16_t event,
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void* p_data);
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static void l2c_csm_w4_l2cap_connect_rsp(tL2C_CCB* p_ccb, uint16_t event,
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void* p_data);
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static void l2c_csm_w4_l2ca_connect_rsp(tL2C_CCB* p_ccb, uint16_t event,
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void* p_data);
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static void l2c_csm_config(tL2C_CCB* p_ccb, uint16_t event, void* p_data);
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static void l2c_csm_open(tL2C_CCB* p_ccb, uint16_t event, void* p_data);
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static void l2c_csm_w4_l2cap_disconnect_rsp(tL2C_CCB* p_ccb, uint16_t event,
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void* p_data);
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static void l2c_csm_w4_l2ca_disconnect_rsp(tL2C_CCB* p_ccb, uint16_t event,
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void* p_data);
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static const char* l2c_csm_get_event_name(uint16_t event);
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/*******************************************************************************
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*
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* Function l2c_csm_execute
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*
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* Description This function executes the state machine.
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*
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* Returns void
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*
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******************************************************************************/
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void l2c_csm_execute(tL2C_CCB* p_ccb, uint16_t event, void* p_data) {
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if (!l2cu_is_ccb_active(p_ccb)) {
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L2CAP_TRACE_WARNING("%s CCB not in use, event (%d) cannot be processed",
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__func__, event);
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return;
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}
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switch (p_ccb->chnl_state) {
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case CST_CLOSED:
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l2c_csm_closed(p_ccb, event, p_data);
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break;
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case CST_ORIG_W4_SEC_COMP:
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l2c_csm_orig_w4_sec_comp(p_ccb, event, p_data);
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break;
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case CST_TERM_W4_SEC_COMP:
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l2c_csm_term_w4_sec_comp(p_ccb, event, p_data);
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break;
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case CST_W4_L2CAP_CONNECT_RSP:
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l2c_csm_w4_l2cap_connect_rsp(p_ccb, event, p_data);
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break;
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case CST_W4_L2CA_CONNECT_RSP:
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l2c_csm_w4_l2ca_connect_rsp(p_ccb, event, p_data);
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break;
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case CST_CONFIG:
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l2c_csm_config(p_ccb, event, p_data);
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break;
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case CST_OPEN:
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l2c_csm_open(p_ccb, event, p_data);
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break;
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case CST_W4_L2CAP_DISCONNECT_RSP:
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l2c_csm_w4_l2cap_disconnect_rsp(p_ccb, event, p_data);
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break;
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case CST_W4_L2CA_DISCONNECT_RSP:
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l2c_csm_w4_l2ca_disconnect_rsp(p_ccb, event, p_data);
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break;
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default:
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L2CAP_TRACE_DEBUG("Unhandled event! event = %d", event);
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break;
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}
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}
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/*******************************************************************************
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*
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* Function l2c_csm_closed
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*
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* Description This function handles events when the channel is in
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* CLOSED state. This state exists only when the link is
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* being initially established.
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*
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* Returns void
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*
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******************************************************************************/
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static void l2c_csm_closed(tL2C_CCB* p_ccb, uint16_t event, void* p_data) {
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tL2C_CONN_INFO* p_ci = (tL2C_CONN_INFO*)p_data;
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uint16_t local_cid = p_ccb->local_cid;
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tL2CA_DISCONNECT_IND_CB* disconnect_ind;
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tL2CA_CONNECT_CFM_CB* connect_cfm;
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if (p_ccb->p_rcb == NULL) {
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L2CAP_TRACE_ERROR("L2CAP - LCID: 0x%04x st: CLOSED evt: %s p_rcb == NULL",
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p_ccb->local_cid, l2c_csm_get_event_name(event));
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return;
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}
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#if (L2CAP_UCD_INCLUDED == TRUE)
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if (local_cid == L2CAP_CONNECTIONLESS_CID) {
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/* check if this event can be processed by UCD */
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if (l2c_ucd_process_event(p_ccb, event, p_data)) {
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/* The event is processed by UCD state machine */
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return;
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}
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}
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#endif
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disconnect_ind = p_ccb->p_rcb->api.pL2CA_DisconnectInd_Cb;
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connect_cfm = p_ccb->p_rcb->api.pL2CA_ConnectCfm_Cb;
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L2CAP_TRACE_EVENT("L2CAP - LCID: 0x%04x st: CLOSED evt: %s",
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p_ccb->local_cid, l2c_csm_get_event_name(event));
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switch (event) {
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case L2CEVT_LP_DISCONNECT_IND: /* Link was disconnected */
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L2CAP_TRACE_API(
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"L2CAP - Calling Disconnect_Ind_Cb(), CID: 0x%04x No Conf Needed",
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p_ccb->local_cid);
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l2cu_release_ccb(p_ccb);
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(*disconnect_ind)(local_cid, false);
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break;
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case L2CEVT_LP_CONNECT_CFM: /* Link came up */
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if (p_ccb->p_lcb->transport == BT_TRANSPORT_LE) {
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p_ccb->chnl_state = CST_ORIG_W4_SEC_COMP;
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l2ble_sec_access_req(p_ccb->p_lcb->remote_bd_addr, p_ccb->p_rcb->psm,
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true, &l2c_link_sec_comp2, p_ccb);
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} else {
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p_ccb->chnl_state = CST_ORIG_W4_SEC_COMP;
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btm_sec_l2cap_access_req(p_ccb->p_lcb->remote_bd_addr,
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p_ccb->p_rcb->psm, p_ccb->p_lcb->handle, true,
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&l2c_link_sec_comp, p_ccb);
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}
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break;
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case L2CEVT_LP_CONNECT_CFM_NEG: /* Link failed */
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/* Disconnect unless ACL collision and upper layer wants to handle it */
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if (p_ci->status != HCI_ERR_CONNECTION_EXISTS ||
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!btm_acl_notif_conn_collision(p_ccb->p_lcb->remote_bd_addr)) {
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L2CAP_TRACE_API(
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"L2CAP - Calling ConnectCfm_Cb(), CID: 0x%04x Status: %d",
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p_ccb->local_cid, p_ci->status);
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l2cu_release_ccb(p_ccb);
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(*connect_cfm)(local_cid, p_ci->status);
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}
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break;
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case L2CEVT_L2CA_CONNECT_REQ: /* API connect request */
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if (p_ccb->p_lcb->transport == BT_TRANSPORT_LE) {
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p_ccb->chnl_state = CST_ORIG_W4_SEC_COMP;
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l2ble_sec_access_req(p_ccb->p_lcb->remote_bd_addr, p_ccb->p_rcb->psm,
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true, &l2c_link_sec_comp2, p_ccb);
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} else {
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/* Cancel sniff mode if needed */
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{
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tBTM_PM_PWR_MD settings;
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memset((void*)&settings, 0, sizeof(settings));
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settings.mode = BTM_PM_MD_ACTIVE;
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BTM_SetPowerMode(BTM_PM_SET_ONLY_ID, p_ccb->p_lcb->remote_bd_addr,
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&settings);
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}
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/* If sec access does not result in started SEC_COM or COMP_NEG are
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* already processed */
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if (btm_sec_l2cap_access_req(p_ccb->p_lcb->remote_bd_addr,
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p_ccb->p_rcb->psm, p_ccb->p_lcb->handle,
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true, &l2c_link_sec_comp,
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p_ccb) == BTM_CMD_STARTED)
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p_ccb->chnl_state = CST_ORIG_W4_SEC_COMP;
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}
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break;
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case L2CEVT_SEC_COMP:
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p_ccb->chnl_state = CST_W4_L2CAP_CONNECT_RSP;
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/* Wait for the info resp in this state before sending connect req (if
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* needed) */
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if (!p_ccb->p_lcb->w4_info_rsp) {
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/* Need to have at least one compatible channel to continue */
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if (!l2c_fcr_chk_chan_modes(p_ccb)) {
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l2cu_release_ccb(p_ccb);
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(*p_ccb->p_rcb->api.pL2CA_ConnectCfm_Cb)(local_cid,
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L2CAP_CONN_NO_LINK);
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} else {
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l2cu_send_peer_connect_req(p_ccb);
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alarm_set_on_mloop(p_ccb->l2c_ccb_timer,
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L2CAP_CHNL_CONNECT_TIMEOUT_MS,
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l2c_ccb_timer_timeout, p_ccb);
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}
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}
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break;
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case L2CEVT_SEC_COMP_NEG: /* something is really bad with security */
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L2CAP_TRACE_API(
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"L2CAP - Calling ConnectCfm_Cb(), CID: 0x%04x Status: %d",
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p_ccb->local_cid, L2CAP_CONN_TIMEOUT);
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l2cu_release_ccb(p_ccb);
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(*connect_cfm)(local_cid, L2CAP_CONN_SECURITY_BLOCK);
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break;
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case L2CEVT_L2CAP_CONNECT_REQ: /* Peer connect request */
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/* stop link timer to avoid race condition between A2MP, Security, and
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* L2CAP */
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alarm_cancel(p_ccb->p_lcb->l2c_lcb_timer);
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if (p_ccb->p_lcb->transport == BT_TRANSPORT_LE) {
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p_ccb->chnl_state = CST_TERM_W4_SEC_COMP;
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l2ble_sec_access_req(p_ccb->p_lcb->remote_bd_addr, p_ccb->p_rcb->psm,
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false, &l2c_link_sec_comp2, p_ccb);
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} else {
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/* Cancel sniff mode if needed */
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{
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tBTM_PM_PWR_MD settings;
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memset((void*)&settings, 0, sizeof(settings));
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settings.mode = BTM_PM_MD_ACTIVE;
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BTM_SetPowerMode(BTM_PM_SET_ONLY_ID, p_ccb->p_lcb->remote_bd_addr,
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&settings);
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}
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p_ccb->chnl_state = CST_TERM_W4_SEC_COMP;
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if (btm_sec_l2cap_access_req(p_ccb->p_lcb->remote_bd_addr,
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p_ccb->p_rcb->psm, p_ccb->p_lcb->handle,
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false, &l2c_link_sec_comp,
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p_ccb) == BTM_CMD_STARTED) {
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/* started the security process, tell the peer to set a longer timer
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*/
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l2cu_send_peer_connect_rsp(p_ccb, L2CAP_CONN_PENDING, 0);
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}
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}
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break;
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case L2CEVT_TIMEOUT:
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L2CAP_TRACE_API(
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"L2CAP - Calling ConnectCfm_Cb(), CID: 0x%04x Status: %d",
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p_ccb->local_cid, L2CAP_CONN_TIMEOUT);
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l2cu_release_ccb(p_ccb);
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(*connect_cfm)(local_cid, L2CAP_CONN_TIMEOUT);
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break;
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case L2CEVT_L2CAP_DATA: /* Peer data packet rcvd */
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case L2CEVT_L2CA_DATA_WRITE: /* Upper layer data to send */
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osi_free(p_data);
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break;
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case L2CEVT_L2CA_DISCONNECT_REQ: /* Upper wants to disconnect */
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l2cu_release_ccb(p_ccb);
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break;
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case L2CEVT_L2CA_SEND_FLOW_CONTROL_CREDIT:
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case L2CEVT_L2CAP_RECV_FLOW_CONTROL_CREDIT:
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osi_free(p_data);
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break;
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}
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}
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/*******************************************************************************
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*
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* Function l2c_csm_orig_w4_sec_comp
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*
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* Description This function handles events when the channel is in
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* CST_ORIG_W4_SEC_COMP state.
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*
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* Returns void
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*
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******************************************************************************/
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static void l2c_csm_orig_w4_sec_comp(tL2C_CCB* p_ccb, uint16_t event,
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void* p_data) {
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tL2CA_DISCONNECT_IND_CB* disconnect_ind =
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p_ccb->p_rcb->api.pL2CA_DisconnectInd_Cb;
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tL2CA_CONNECT_CFM_CB* connect_cfm = p_ccb->p_rcb->api.pL2CA_ConnectCfm_Cb;
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uint16_t local_cid = p_ccb->local_cid;
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L2CAP_TRACE_EVENT("L2CAP - LCID: 0x%04x st: ORIG_W4_SEC_COMP evt: %s",
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p_ccb->local_cid, l2c_csm_get_event_name(event));
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#if (L2CAP_UCD_INCLUDED == TRUE)
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if (local_cid == L2CAP_CONNECTIONLESS_CID) {
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/* check if this event can be processed by UCD */
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if (l2c_ucd_process_event(p_ccb, event, p_data)) {
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/* The event is processed by UCD state machine */
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return;
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}
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}
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#endif
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switch (event) {
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case L2CEVT_LP_DISCONNECT_IND: /* Link was disconnected */
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L2CAP_TRACE_API(
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"L2CAP - Calling Disconnect_Ind_Cb(), CID: 0x%04x No Conf Needed",
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p_ccb->local_cid);
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l2cu_release_ccb(p_ccb);
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(*disconnect_ind)(local_cid, false);
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break;
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case L2CEVT_SEC_RE_SEND_CMD: /* BTM has enough info to proceed */
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case L2CEVT_LP_CONNECT_CFM: /* Link came up */
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if (p_ccb->p_lcb->transport == BT_TRANSPORT_LE) {
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l2ble_sec_access_req(p_ccb->p_lcb->remote_bd_addr, p_ccb->p_rcb->psm,
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false, &l2c_link_sec_comp2, p_ccb);
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} else {
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btm_sec_l2cap_access_req(p_ccb->p_lcb->remote_bd_addr,
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p_ccb->p_rcb->psm, p_ccb->p_lcb->handle, true,
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&l2c_link_sec_comp, p_ccb);
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}
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break;
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case L2CEVT_SEC_COMP: /* Security completed success */
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/* Wait for the info resp in this state before sending connect req (if
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* needed) */
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p_ccb->chnl_state = CST_W4_L2CAP_CONNECT_RSP;
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if (p_ccb->p_lcb->transport == BT_TRANSPORT_LE) {
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alarm_set_on_mloop(p_ccb->l2c_ccb_timer, L2CAP_CHNL_CONNECT_TIMEOUT_MS,
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l2c_ccb_timer_timeout, p_ccb);
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l2cble_credit_based_conn_req(p_ccb); /* Start Connection */
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} else {
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if (!p_ccb->p_lcb->w4_info_rsp) {
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/* Need to have at least one compatible channel to continue */
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if (!l2c_fcr_chk_chan_modes(p_ccb)) {
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l2cu_release_ccb(p_ccb);
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(*connect_cfm)(local_cid, L2CAP_CONN_NO_LINK);
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} else {
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alarm_set_on_mloop(p_ccb->l2c_ccb_timer,
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L2CAP_CHNL_CONNECT_TIMEOUT_MS,
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l2c_ccb_timer_timeout, p_ccb);
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l2cu_send_peer_connect_req(p_ccb); /* Start Connection */
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}
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}
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}
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break;
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case L2CEVT_SEC_COMP_NEG:
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L2CAP_TRACE_API(
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"L2CAP - Calling ConnectCfm_Cb(), CID: 0x%04x Status: %d",
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p_ccb->local_cid, HCI_ERR_AUTH_FAILURE);
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/* If last channel immediately disconnect the ACL for better security.
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Also prevents a race condition between BTM and L2CAP */
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if ((p_ccb == p_ccb->p_lcb->ccb_queue.p_first_ccb) &&
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(p_ccb == p_ccb->p_lcb->ccb_queue.p_last_ccb)) {
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p_ccb->p_lcb->idle_timeout = 0;
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}
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l2cu_release_ccb(p_ccb);
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(*connect_cfm)(local_cid, HCI_ERR_AUTH_FAILURE);
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break;
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case L2CEVT_L2CA_DATA_WRITE: /* Upper layer data to send */
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case L2CEVT_L2CAP_DATA: /* Peer data packet rcvd */
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osi_free(p_data);
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break;
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case L2CEVT_L2CA_DISCONNECT_REQ: /* Upper wants to disconnect */
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/* Tell security manager to abort */
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btm_sec_abort_access_req(p_ccb->p_lcb->remote_bd_addr);
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l2cu_release_ccb(p_ccb);
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break;
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}
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}
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|
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/*******************************************************************************
|
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*
|
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* Function l2c_csm_term_w4_sec_comp
|
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*
|
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* Description This function handles events when the channel is in
|
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* CST_TERM_W4_SEC_COMP state.
|
|
*
|
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* Returns void
|
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*
|
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******************************************************************************/
|
|
static void l2c_csm_term_w4_sec_comp(tL2C_CCB* p_ccb, uint16_t event,
|
|
void* p_data) {
|
|
L2CAP_TRACE_EVENT("L2CAP - LCID: 0x%04x st: TERM_W4_SEC_COMP evt: %s",
|
|
p_ccb->local_cid, l2c_csm_get_event_name(event));
|
|
|
|
#if (L2CAP_UCD_INCLUDED == TRUE)
|
|
if (p_ccb->local_cid == L2CAP_CONNECTIONLESS_CID) {
|
|
/* check if this event can be processed by UCD */
|
|
if (l2c_ucd_process_event(p_ccb, event, p_data)) {
|
|
/* The event is processed by UCD state machine */
|
|
return;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
switch (event) {
|
|
case L2CEVT_LP_DISCONNECT_IND: /* Link was disconnected */
|
|
/* Tell security manager to abort */
|
|
btm_sec_abort_access_req(p_ccb->p_lcb->remote_bd_addr);
|
|
|
|
l2cu_release_ccb(p_ccb);
|
|
break;
|
|
|
|
case L2CEVT_SEC_COMP:
|
|
p_ccb->chnl_state = CST_W4_L2CA_CONNECT_RSP;
|
|
|
|
/* Wait for the info resp in next state before sending connect ind (if
|
|
* needed) */
|
|
if (!p_ccb->p_lcb->w4_info_rsp) {
|
|
/* Don't need to get info from peer or already retrieved so continue */
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer, L2CAP_CHNL_CONNECT_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
L2CAP_TRACE_API("L2CAP - Calling Connect_Ind_Cb(), CID: 0x%04x",
|
|
p_ccb->local_cid);
|
|
|
|
(*p_ccb->p_rcb->api.pL2CA_ConnectInd_Cb)(
|
|
p_ccb->p_lcb->remote_bd_addr, p_ccb->local_cid, p_ccb->p_rcb->psm,
|
|
p_ccb->remote_id);
|
|
} else {
|
|
/*
|
|
** L2CAP Connect Response will be sent out by 3 sec timer expiration
|
|
** because Bluesoleil doesn't respond to L2CAP Information Request.
|
|
** Bluesoleil seems to disconnect ACL link as failure case, because
|
|
** it takes too long (4~7secs) to get response.
|
|
** product version : Bluesoleil 2.1.1.0 EDR Release 060123
|
|
** stack version : 05.04.11.20060119
|
|
*/
|
|
|
|
/* Waiting for the info resp, tell the peer to set a longer timer */
|
|
l2cu_send_peer_connect_rsp(p_ccb, L2CAP_CONN_PENDING, 0);
|
|
}
|
|
break;
|
|
|
|
case L2CEVT_SEC_COMP_NEG:
|
|
if (((tL2C_CONN_INFO*)p_data)->status == 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);
|
|
} else {
|
|
if (p_ccb->p_lcb->transport == BT_TRANSPORT_LE)
|
|
l2cu_reject_ble_connection(p_ccb->p_lcb, p_ccb->remote_id,
|
|
L2CAP_LE_INSUFFICIENT_AUTHENTICATION);
|
|
else
|
|
l2cu_send_peer_connect_rsp(p_ccb, L2CAP_CONN_SECURITY_BLOCK, 0);
|
|
l2cu_release_ccb(p_ccb);
|
|
}
|
|
break;
|
|
|
|
case L2CEVT_L2CA_DATA_WRITE: /* Upper layer data to send */
|
|
case L2CEVT_L2CAP_DATA: /* Peer data packet rcvd */
|
|
osi_free(p_data);
|
|
break;
|
|
|
|
case L2CEVT_L2CA_DISCONNECT_REQ: /* Upper wants to disconnect */
|
|
l2cu_release_ccb(p_ccb);
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_DISCONNECT_REQ: /* Peer disconnected request */
|
|
l2cu_send_peer_disc_rsp(p_ccb->p_lcb, p_ccb->remote_id, p_ccb->local_cid,
|
|
p_ccb->remote_cid);
|
|
|
|
/* Tell security manager to abort */
|
|
btm_sec_abort_access_req(p_ccb->p_lcb->remote_bd_addr);
|
|
|
|
l2cu_release_ccb(p_ccb);
|
|
break;
|
|
|
|
case L2CEVT_TIMEOUT:
|
|
/* SM4 related. */
|
|
btsnd_hcic_disconnect(p_ccb->p_lcb->handle, HCI_ERR_AUTH_FAILURE);
|
|
break;
|
|
|
|
case L2CEVT_SEC_RE_SEND_CMD: /* BTM has enough info to proceed */
|
|
btm_sec_l2cap_access_req(p_ccb->p_lcb->remote_bd_addr, p_ccb->p_rcb->psm,
|
|
p_ccb->p_lcb->handle, false, &l2c_link_sec_comp,
|
|
p_ccb);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function l2c_csm_w4_l2cap_connect_rsp
|
|
*
|
|
* Description This function handles events when the channel is in
|
|
* CST_W4_L2CAP_CONNECT_RSP state.
|
|
*
|
|
* Returns void
|
|
*
|
|
******************************************************************************/
|
|
static void l2c_csm_w4_l2cap_connect_rsp(tL2C_CCB* p_ccb, uint16_t event,
|
|
void* p_data) {
|
|
tL2C_CONN_INFO* p_ci = (tL2C_CONN_INFO*)p_data;
|
|
tL2CA_DISCONNECT_IND_CB* disconnect_ind =
|
|
p_ccb->p_rcb->api.pL2CA_DisconnectInd_Cb;
|
|
tL2CA_CONNECT_CFM_CB* connect_cfm = p_ccb->p_rcb->api.pL2CA_ConnectCfm_Cb;
|
|
uint16_t local_cid = p_ccb->local_cid;
|
|
|
|
L2CAP_TRACE_EVENT("L2CAP - LCID: 0x%04x st: W4_L2CAP_CON_RSP evt: %s",
|
|
p_ccb->local_cid, l2c_csm_get_event_name(event));
|
|
|
|
switch (event) {
|
|
case L2CEVT_LP_DISCONNECT_IND: /* Link was disconnected */
|
|
/* Send disc indication unless peer to peer race condition AND normal
|
|
* disconnect */
|
|
/* *((uint8_t *)p_data) != HCI_ERR_PEER_USER happens when peer device try
|
|
* to disconnect for normal reason */
|
|
p_ccb->chnl_state = CST_CLOSED;
|
|
if ((p_ccb->flags & CCB_FLAG_NO_RETRY) || !p_data ||
|
|
(*((uint8_t*)p_data) != HCI_ERR_PEER_USER)) {
|
|
L2CAP_TRACE_API(
|
|
"L2CAP - Calling Disconnect_Ind_Cb(), CID: 0x%04x No Conf Needed",
|
|
p_ccb->local_cid);
|
|
l2cu_release_ccb(p_ccb);
|
|
(*disconnect_ind)(local_cid, false);
|
|
}
|
|
p_ccb->flags |= CCB_FLAG_NO_RETRY;
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_CONNECT_RSP: /* Got peer connect confirm */
|
|
p_ccb->remote_cid = p_ci->remote_cid;
|
|
if (p_ccb->p_lcb->transport == BT_TRANSPORT_LE) {
|
|
/* Connection is completed */
|
|
alarm_cancel(p_ccb->l2c_ccb_timer);
|
|
p_ccb->chnl_state = CST_OPEN;
|
|
} else {
|
|
p_ccb->chnl_state = CST_CONFIG;
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer, L2CAP_CHNL_CFG_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
}
|
|
L2CAP_TRACE_API("L2CAP - Calling Connect_Cfm_Cb(), CID: 0x%04x, Success",
|
|
p_ccb->local_cid);
|
|
|
|
(*p_ccb->p_rcb->api.pL2CA_ConnectCfm_Cb)(local_cid, L2CAP_CONN_OK);
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_CONNECT_RSP_PND: /* Got peer connect pending */
|
|
p_ccb->remote_cid = p_ci->remote_cid;
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer,
|
|
L2CAP_CHNL_CONNECT_EXT_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
if (p_ccb->p_rcb->api.pL2CA_ConnectPnd_Cb) {
|
|
L2CAP_TRACE_API("L2CAP - Calling Connect_Pnd_Cb(), CID: 0x%04x",
|
|
p_ccb->local_cid);
|
|
(*p_ccb->p_rcb->api.pL2CA_ConnectPnd_Cb)(p_ccb->local_cid);
|
|
}
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_CONNECT_RSP_NEG: /* Peer rejected connection */
|
|
L2CAP_TRACE_API(
|
|
"L2CAP - Calling Connect_Cfm_Cb(), CID: 0x%04x, Failure Code: %d",
|
|
p_ccb->local_cid, p_ci->l2cap_result);
|
|
l2cu_release_ccb(p_ccb);
|
|
(*connect_cfm)(local_cid, p_ci->l2cap_result);
|
|
break;
|
|
|
|
case L2CEVT_TIMEOUT:
|
|
L2CAP_TRACE_API("L2CAP - Calling Connect_Cfm_Cb(), CID: 0x%04x, Timeout",
|
|
p_ccb->local_cid);
|
|
l2cu_release_ccb(p_ccb);
|
|
(*connect_cfm)(local_cid, L2CAP_CONN_TIMEOUT);
|
|
break;
|
|
|
|
case L2CEVT_L2CA_DISCONNECT_REQ: /* Upper wants to disconnect */
|
|
/* If we know peer CID from connect pending, we can send disconnect */
|
|
if (p_ccb->remote_cid != 0) {
|
|
l2cu_send_peer_disc_req(p_ccb);
|
|
p_ccb->chnl_state = CST_W4_L2CAP_DISCONNECT_RSP;
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer,
|
|
L2CAP_CHNL_DISCONNECT_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
} else {
|
|
tL2CA_DISCONNECT_CFM_CB* disconnect_cfm =
|
|
p_ccb->p_rcb->api.pL2CA_DisconnectCfm_Cb;
|
|
l2cu_release_ccb(p_ccb);
|
|
if (disconnect_cfm) {
|
|
L2CAP_TRACE_API("%s: L2CAP - Calling DisconnectCfm_Cb(), CID: 0x%04x",
|
|
__func__, local_cid);
|
|
(*disconnect_cfm)(local_cid, L2CAP_CONN_NO_LINK);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case L2CEVT_L2CA_DATA_WRITE: /* Upper layer data to send */
|
|
case L2CEVT_L2CAP_DATA: /* Peer data packet rcvd */
|
|
osi_free(p_data);
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_INFO_RSP:
|
|
/* Need to have at least one compatible channel to continue */
|
|
if (!l2c_fcr_chk_chan_modes(p_ccb)) {
|
|
l2cu_release_ccb(p_ccb);
|
|
(*connect_cfm)(local_cid, L2CAP_CONN_NO_LINK);
|
|
} else {
|
|
/* We have feature info, so now send peer connect request */
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer, L2CAP_CHNL_CONNECT_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
l2cu_send_peer_connect_req(p_ccb); /* Start Connection */
|
|
}
|
|
break;
|
|
|
|
case L2CEVT_L2CA_SEND_FLOW_CONTROL_CREDIT:
|
|
case L2CEVT_L2CAP_RECV_FLOW_CONTROL_CREDIT:
|
|
osi_free(p_data);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function l2c_csm_w4_l2ca_connect_rsp
|
|
*
|
|
* Description This function handles events when the channel is in
|
|
* CST_W4_L2CA_CONNECT_RSP state.
|
|
*
|
|
* Returns void
|
|
*
|
|
******************************************************************************/
|
|
static void l2c_csm_w4_l2ca_connect_rsp(tL2C_CCB* p_ccb, uint16_t event,
|
|
void* p_data) {
|
|
tL2C_CONN_INFO* p_ci;
|
|
tL2CA_DISCONNECT_IND_CB* disconnect_ind =
|
|
p_ccb->p_rcb->api.pL2CA_DisconnectInd_Cb;
|
|
uint16_t local_cid = p_ccb->local_cid;
|
|
|
|
L2CAP_TRACE_EVENT("L2CAP - LCID: 0x%04x st: W4_L2CA_CON_RSP evt: %s",
|
|
p_ccb->local_cid, l2c_csm_get_event_name(event));
|
|
|
|
switch (event) {
|
|
case L2CEVT_LP_DISCONNECT_IND: /* Link was disconnected */
|
|
L2CAP_TRACE_API(
|
|
"L2CAP - Calling Disconnect_Ind_Cb(), CID: 0x%04x No Conf Needed",
|
|
p_ccb->local_cid);
|
|
l2cu_release_ccb(p_ccb);
|
|
(*disconnect_ind)(local_cid, false);
|
|
break;
|
|
|
|
case L2CEVT_L2CA_CONNECT_RSP:
|
|
p_ci = (tL2C_CONN_INFO*)p_data;
|
|
if (p_ccb->p_lcb->transport == BT_TRANSPORT_LE) {
|
|
/* Result should be OK or Reject */
|
|
if ((!p_ci) || (p_ci->l2cap_result == L2CAP_CONN_OK)) {
|
|
l2cble_credit_based_conn_res(p_ccb, L2CAP_CONN_OK);
|
|
p_ccb->chnl_state = CST_OPEN;
|
|
alarm_cancel(p_ccb->l2c_ccb_timer);
|
|
} else {
|
|
l2cble_credit_based_conn_res(p_ccb, p_ci->l2cap_result);
|
|
l2cu_release_ccb(p_ccb);
|
|
}
|
|
} else {
|
|
/* Result should be OK or PENDING */
|
|
if ((!p_ci) || (p_ci->l2cap_result == L2CAP_CONN_OK)) {
|
|
l2cu_send_peer_connect_rsp(p_ccb, L2CAP_CONN_OK, 0);
|
|
p_ccb->chnl_state = CST_CONFIG;
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer, L2CAP_CHNL_CFG_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
} else {
|
|
/* If pending, stay in same state and start extended timer */
|
|
l2cu_send_peer_connect_rsp(p_ccb, p_ci->l2cap_result,
|
|
p_ci->l2cap_status);
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer,
|
|
L2CAP_CHNL_CONNECT_EXT_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case L2CEVT_L2CA_CONNECT_RSP_NEG:
|
|
p_ci = (tL2C_CONN_INFO*)p_data;
|
|
if (p_ccb->p_lcb->transport == BT_TRANSPORT_LE)
|
|
l2cble_credit_based_conn_res(p_ccb, p_ci->l2cap_result);
|
|
else
|
|
l2cu_send_peer_connect_rsp(p_ccb, p_ci->l2cap_result,
|
|
p_ci->l2cap_status);
|
|
l2cu_release_ccb(p_ccb);
|
|
break;
|
|
|
|
case L2CEVT_TIMEOUT:
|
|
l2cu_send_peer_connect_rsp(p_ccb, L2CAP_CONN_NO_PSM, 0);
|
|
L2CAP_TRACE_API(
|
|
"L2CAP - Calling Disconnect_Ind_Cb(), CID: 0x%04x No Conf Needed",
|
|
p_ccb->local_cid);
|
|
l2cu_release_ccb(p_ccb);
|
|
(*disconnect_ind)(local_cid, false);
|
|
break;
|
|
|
|
case L2CEVT_L2CA_DATA_WRITE: /* Upper layer data to send */
|
|
case L2CEVT_L2CAP_DATA: /* Peer data packet rcvd */
|
|
osi_free(p_data);
|
|
break;
|
|
|
|
case L2CEVT_L2CA_DISCONNECT_REQ: /* Upper wants to disconnect */
|
|
l2cu_send_peer_disc_req(p_ccb);
|
|
p_ccb->chnl_state = CST_W4_L2CAP_DISCONNECT_RSP;
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer, L2CAP_CHNL_DISCONNECT_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_INFO_RSP:
|
|
/* We have feature info, so now give the upper layer connect IND */
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer, L2CAP_CHNL_CONNECT_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
L2CAP_TRACE_API("L2CAP - Calling Connect_Ind_Cb(), CID: 0x%04x",
|
|
p_ccb->local_cid);
|
|
|
|
(*p_ccb->p_rcb->api.pL2CA_ConnectInd_Cb)(
|
|
p_ccb->p_lcb->remote_bd_addr, p_ccb->local_cid, p_ccb->p_rcb->psm,
|
|
p_ccb->remote_id);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function l2c_csm_config
|
|
*
|
|
* Description This function handles events when the channel is in
|
|
* CONFIG state.
|
|
*
|
|
* Returns void
|
|
*
|
|
******************************************************************************/
|
|
static void l2c_csm_config(tL2C_CCB* p_ccb, uint16_t event, void* p_data) {
|
|
tL2CAP_CFG_INFO* p_cfg = (tL2CAP_CFG_INFO*)p_data;
|
|
tL2CA_DISCONNECT_IND_CB* disconnect_ind =
|
|
p_ccb->p_rcb->api.pL2CA_DisconnectInd_Cb;
|
|
uint16_t local_cid = p_ccb->local_cid;
|
|
uint8_t cfg_result;
|
|
|
|
L2CAP_TRACE_EVENT("L2CAP - LCID: 0x%04x st: CONFIG evt: %s",
|
|
p_ccb->local_cid, l2c_csm_get_event_name(event));
|
|
|
|
switch (event) {
|
|
case L2CEVT_LP_DISCONNECT_IND: /* Link was disconnected */
|
|
L2CAP_TRACE_API(
|
|
"L2CAP - Calling Disconnect_Ind_Cb(), CID: 0x%04x No Conf Needed",
|
|
p_ccb->local_cid);
|
|
l2cu_release_ccb(p_ccb);
|
|
(*disconnect_ind)(local_cid, false);
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_CONFIG_REQ: /* Peer config request */
|
|
|
|
cfg_result = l2cu_process_peer_cfg_req(p_ccb, p_cfg);
|
|
if (cfg_result == L2CAP_PEER_CFG_OK) {
|
|
L2CAP_TRACE_EVENT(
|
|
"L2CAP - Calling Config_Req_Cb(), CID: 0x%04x, C-bit %d",
|
|
p_ccb->local_cid, (p_cfg->flags & L2CAP_CFG_FLAGS_MASK_CONT));
|
|
(*p_ccb->p_rcb->api.pL2CA_ConfigInd_Cb)(p_ccb->local_cid, p_cfg);
|
|
} else if (cfg_result == L2CAP_PEER_CFG_DISCONNECT) {
|
|
/* Disconnect if channels are incompatible */
|
|
L2CAP_TRACE_EVENT("L2CAP - incompatible configurations disconnect");
|
|
l2cu_disconnect_chnl(p_ccb);
|
|
} else /* Return error to peer so he can renegotiate if possible */
|
|
{
|
|
L2CAP_TRACE_EVENT(
|
|
"L2CAP - incompatible configurations trying reconfig");
|
|
l2cu_send_peer_config_rsp(p_ccb, p_cfg);
|
|
}
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_CONFIG_RSP: /* Peer config response */
|
|
l2cu_process_peer_cfg_rsp(p_ccb, p_cfg);
|
|
|
|
if (p_cfg->result != L2CAP_CFG_PENDING) {
|
|
/* TBD: When config options grow beyong minimum MTU (48 bytes)
|
|
* logic needs to be added to handle responses with
|
|
* continuation bit set in flags field.
|
|
* 1. Send additional config request out until C-bit is cleared in
|
|
* response
|
|
*/
|
|
p_ccb->config_done |= OB_CFG_DONE;
|
|
|
|
if (p_ccb->config_done & IB_CFG_DONE) {
|
|
/* Verify two sides are in compatible modes before continuing */
|
|
if (p_ccb->our_cfg.fcr.mode != p_ccb->peer_cfg.fcr.mode) {
|
|
l2cu_send_peer_disc_req(p_ccb);
|
|
L2CAP_TRACE_WARNING(
|
|
"L2CAP - Calling Disconnect_Ind_Cb(Incompatible CFG), CID: "
|
|
"0x%04x No Conf Needed",
|
|
p_ccb->local_cid);
|
|
l2cu_release_ccb(p_ccb);
|
|
(*disconnect_ind)(local_cid, false);
|
|
break;
|
|
}
|
|
|
|
p_ccb->config_done |= RECONFIG_FLAG;
|
|
p_ccb->chnl_state = CST_OPEN;
|
|
l2c_link_adjust_chnl_allocation();
|
|
alarm_cancel(p_ccb->l2c_ccb_timer);
|
|
|
|
/* If using eRTM and waiting for an ACK, restart the ACK timer */
|
|
if (p_ccb->fcrb.wait_ack) l2c_fcr_start_timer(p_ccb);
|
|
|
|
/*
|
|
** check p_ccb->our_cfg.fcr.mon_tout and
|
|
*p_ccb->our_cfg.fcr.rtrans_tout
|
|
** we may set them to zero when sending config request during
|
|
*renegotiation
|
|
*/
|
|
if ((p_ccb->our_cfg.fcr.mode == L2CAP_FCR_ERTM_MODE) &&
|
|
((p_ccb->our_cfg.fcr.mon_tout == 0) ||
|
|
(p_ccb->our_cfg.fcr.rtrans_tout))) {
|
|
l2c_fcr_adj_monitor_retran_timeout(p_ccb);
|
|
}
|
|
|
|
#if (L2CAP_ERTM_STATS == TRUE)
|
|
p_ccb->fcrb.connect_tick_count = time_get_os_boottime_ms();
|
|
#endif
|
|
/* See if we can forward anything on the hold queue */
|
|
if (!fixed_queue_is_empty(p_ccb->xmit_hold_q)) {
|
|
l2c_link_check_send_pkts(p_ccb->p_lcb, NULL, NULL);
|
|
}
|
|
}
|
|
}
|
|
|
|
L2CAP_TRACE_API("L2CAP - Calling Config_Rsp_Cb(), CID: 0x%04x",
|
|
p_ccb->local_cid);
|
|
(*p_ccb->p_rcb->api.pL2CA_ConfigCfm_Cb)(p_ccb->local_cid, p_cfg);
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_CONFIG_RSP_NEG: /* Peer config error rsp */
|
|
/* Disable the Timer */
|
|
alarm_cancel(p_ccb->l2c_ccb_timer);
|
|
|
|
/* If failure was channel mode try to renegotiate */
|
|
if (l2c_fcr_renegotiate_chan(p_ccb, p_cfg) == false) {
|
|
L2CAP_TRACE_API(
|
|
"L2CAP - Calling Config_Rsp_Cb(), CID: 0x%04x, Failure: %d",
|
|
p_ccb->local_cid, p_cfg->result);
|
|
(*p_ccb->p_rcb->api.pL2CA_ConfigCfm_Cb)(p_ccb->local_cid, p_cfg);
|
|
}
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_DISCONNECT_REQ: /* Peer disconnected request */
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer, L2CAP_CHNL_DISCONNECT_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
p_ccb->chnl_state = CST_W4_L2CA_DISCONNECT_RSP;
|
|
L2CAP_TRACE_API(
|
|
"L2CAP - Calling Disconnect_Ind_Cb(), CID: 0x%04x Conf Needed",
|
|
p_ccb->local_cid);
|
|
(*p_ccb->p_rcb->api.pL2CA_DisconnectInd_Cb)(p_ccb->local_cid, true);
|
|
break;
|
|
|
|
case L2CEVT_L2CA_CONFIG_REQ: /* Upper layer config req */
|
|
l2cu_process_our_cfg_req(p_ccb, p_cfg);
|
|
l2cu_send_peer_config_req(p_ccb, p_cfg);
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer, L2CAP_CHNL_CFG_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
break;
|
|
|
|
case L2CEVT_L2CA_CONFIG_RSP: /* Upper layer config rsp */
|
|
l2cu_process_our_cfg_rsp(p_ccb, p_cfg);
|
|
|
|
/* Not finished if continuation flag is set */
|
|
if ((p_cfg->flags & L2CAP_CFG_FLAGS_MASK_CONT) ||
|
|
(p_cfg->result == L2CAP_CFG_PENDING)) {
|
|
/* Send intermediate response; remain in cfg state */
|
|
l2cu_send_peer_config_rsp(p_ccb, p_cfg);
|
|
break;
|
|
}
|
|
|
|
/* Local config done; clear cached configuration in case reconfig takes
|
|
* place later */
|
|
p_ccb->peer_cfg.mtu_present = false;
|
|
p_ccb->peer_cfg.flush_to_present = false;
|
|
p_ccb->peer_cfg.qos_present = false;
|
|
|
|
p_ccb->config_done |= IB_CFG_DONE;
|
|
|
|
if (p_ccb->config_done & OB_CFG_DONE) {
|
|
/* Verify two sides are in compatible modes before continuing */
|
|
if (p_ccb->our_cfg.fcr.mode != p_ccb->peer_cfg.fcr.mode) {
|
|
l2cu_send_peer_disc_req(p_ccb);
|
|
L2CAP_TRACE_WARNING(
|
|
"L2CAP - Calling Disconnect_Ind_Cb(Incompatible CFG), CID: "
|
|
"0x%04x No Conf Needed",
|
|
p_ccb->local_cid);
|
|
l2cu_release_ccb(p_ccb);
|
|
(*disconnect_ind)(local_cid, false);
|
|
break;
|
|
}
|
|
|
|
p_ccb->config_done |= RECONFIG_FLAG;
|
|
p_ccb->chnl_state = CST_OPEN;
|
|
l2c_link_adjust_chnl_allocation();
|
|
alarm_cancel(p_ccb->l2c_ccb_timer);
|
|
}
|
|
|
|
l2cu_send_peer_config_rsp(p_ccb, p_cfg);
|
|
|
|
/* If using eRTM and waiting for an ACK, restart the ACK timer */
|
|
if (p_ccb->fcrb.wait_ack) l2c_fcr_start_timer(p_ccb);
|
|
|
|
#if (L2CAP_ERTM_STATS == TRUE)
|
|
p_ccb->fcrb.connect_tick_count = time_get_os_boottime_ms();
|
|
#endif
|
|
|
|
/* See if we can forward anything on the hold queue */
|
|
if ((p_ccb->chnl_state == CST_OPEN) &&
|
|
(!fixed_queue_is_empty(p_ccb->xmit_hold_q))) {
|
|
l2c_link_check_send_pkts(p_ccb->p_lcb, NULL, NULL);
|
|
}
|
|
break;
|
|
|
|
case L2CEVT_L2CA_CONFIG_RSP_NEG: /* Upper layer config reject */
|
|
l2cu_send_peer_config_rsp(p_ccb, p_cfg);
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer, L2CAP_CHNL_CFG_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
break;
|
|
|
|
case L2CEVT_L2CA_DISCONNECT_REQ: /* Upper wants to disconnect */
|
|
l2cu_send_peer_disc_req(p_ccb);
|
|
p_ccb->chnl_state = CST_W4_L2CAP_DISCONNECT_RSP;
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer, L2CAP_CHNL_DISCONNECT_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_DATA: /* Peer data packet rcvd */
|
|
L2CAP_TRACE_API("L2CAP - Calling DataInd_Cb(), CID: 0x%04x",
|
|
p_ccb->local_cid);
|
|
#if (L2CAP_NUM_FIXED_CHNLS > 0)
|
|
if (p_ccb->local_cid >= L2CAP_FIRST_FIXED_CHNL &&
|
|
p_ccb->local_cid <= L2CAP_LAST_FIXED_CHNL) {
|
|
if (p_ccb->local_cid < L2CAP_BASE_APPL_CID) {
|
|
if (l2cb.fixed_reg[p_ccb->local_cid - L2CAP_FIRST_FIXED_CHNL]
|
|
.pL2CA_FixedData_Cb)
|
|
(*l2cb.fixed_reg[p_ccb->local_cid - L2CAP_FIRST_FIXED_CHNL]
|
|
.pL2CA_FixedData_Cb)(p_ccb->local_cid,
|
|
p_ccb->p_lcb->remote_bd_addr,
|
|
(BT_HDR*)p_data);
|
|
else
|
|
osi_free(p_data);
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
(*p_ccb->p_rcb->api.pL2CA_DataInd_Cb)(p_ccb->local_cid, (BT_HDR*)p_data);
|
|
break;
|
|
|
|
case L2CEVT_L2CA_DATA_WRITE: /* Upper layer data to send */
|
|
if (p_ccb->config_done & OB_CFG_DONE)
|
|
l2c_enqueue_peer_data(p_ccb, (BT_HDR*)p_data);
|
|
else
|
|
osi_free(p_data);
|
|
break;
|
|
|
|
case L2CEVT_TIMEOUT:
|
|
l2cu_send_peer_disc_req(p_ccb);
|
|
L2CAP_TRACE_API(
|
|
"L2CAP - Calling Disconnect_Ind_Cb(), CID: 0x%04x No Conf Needed",
|
|
p_ccb->local_cid);
|
|
l2cu_release_ccb(p_ccb);
|
|
(*disconnect_ind)(local_cid, false);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function l2c_csm_open
|
|
*
|
|
* Description This function handles events when the channel is in
|
|
* OPEN state.
|
|
*
|
|
* Returns void
|
|
*
|
|
******************************************************************************/
|
|
static void l2c_csm_open(tL2C_CCB* p_ccb, uint16_t event, void* p_data) {
|
|
uint16_t local_cid = p_ccb->local_cid;
|
|
tL2CAP_CFG_INFO* p_cfg;
|
|
tL2C_CHNL_STATE tempstate;
|
|
uint8_t tempcfgdone;
|
|
uint8_t cfg_result;
|
|
uint16_t* credit;
|
|
|
|
L2CAP_TRACE_EVENT("L2CAP - LCID: 0x%04x st: OPEN evt: %s", p_ccb->local_cid,
|
|
l2c_csm_get_event_name(event));
|
|
|
|
#if (L2CAP_UCD_INCLUDED == TRUE)
|
|
if (local_cid == L2CAP_CONNECTIONLESS_CID) {
|
|
/* check if this event can be processed by UCD */
|
|
if (l2c_ucd_process_event(p_ccb, event, p_data)) {
|
|
/* The event is processed by UCD state machine */
|
|
return;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
switch (event) {
|
|
case L2CEVT_LP_DISCONNECT_IND: /* Link was disconnected */
|
|
L2CAP_TRACE_API(
|
|
"L2CAP - Calling Disconnect_Ind_Cb(), CID: 0x%04x No Conf Needed",
|
|
p_ccb->local_cid);
|
|
l2cu_release_ccb(p_ccb);
|
|
if (p_ccb->p_rcb)
|
|
(*p_ccb->p_rcb->api.pL2CA_DisconnectInd_Cb)(local_cid, false);
|
|
break;
|
|
|
|
case L2CEVT_LP_QOS_VIOLATION_IND: /* QOS violation */
|
|
/* Tell upper layer. If service guaranteed, then clear the channel */
|
|
if (p_ccb->p_rcb->api.pL2CA_QoSViolationInd_Cb)
|
|
(*p_ccb->p_rcb->api.pL2CA_QoSViolationInd_Cb)(
|
|
p_ccb->p_lcb->remote_bd_addr);
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_CONFIG_REQ: /* Peer config request */
|
|
p_cfg = (tL2CAP_CFG_INFO*)p_data;
|
|
|
|
tempstate = p_ccb->chnl_state;
|
|
tempcfgdone = p_ccb->config_done;
|
|
p_ccb->chnl_state = CST_CONFIG;
|
|
p_ccb->config_done &= ~CFG_DONE_MASK;
|
|
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer, L2CAP_CHNL_CFG_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
|
|
cfg_result = l2cu_process_peer_cfg_req(p_ccb, p_cfg);
|
|
if (cfg_result == L2CAP_PEER_CFG_OK) {
|
|
(*p_ccb->p_rcb->api.pL2CA_ConfigInd_Cb)(p_ccb->local_cid, p_cfg);
|
|
}
|
|
|
|
/* Error in config parameters: reset state and config flag */
|
|
else if (cfg_result == L2CAP_PEER_CFG_UNACCEPTABLE) {
|
|
alarm_cancel(p_ccb->l2c_ccb_timer);
|
|
p_ccb->chnl_state = tempstate;
|
|
p_ccb->config_done = tempcfgdone;
|
|
l2cu_send_peer_config_rsp(p_ccb, p_cfg);
|
|
} else /* L2CAP_PEER_CFG_DISCONNECT */
|
|
{
|
|
/* Disconnect if channels are incompatible
|
|
* Note this should not occur if reconfigure
|
|
* since this should have never passed original config.
|
|
*/
|
|
l2cu_disconnect_chnl(p_ccb);
|
|
}
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_DISCONNECT_REQ: /* Peer disconnected request */
|
|
if (p_ccb->p_lcb->transport != BT_TRANSPORT_LE) {
|
|
/* Make sure we are not in sniff mode */
|
|
{
|
|
tBTM_PM_PWR_MD settings;
|
|
memset((void*)&settings, 0, sizeof(settings));
|
|
settings.mode = BTM_PM_MD_ACTIVE;
|
|
BTM_SetPowerMode(BTM_PM_SET_ONLY_ID, p_ccb->p_lcb->remote_bd_addr,
|
|
&settings);
|
|
}
|
|
}
|
|
|
|
p_ccb->chnl_state = CST_W4_L2CA_DISCONNECT_RSP;
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer, L2CAP_CHNL_DISCONNECT_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
L2CAP_TRACE_API(
|
|
"L2CAP - Calling Disconnect_Ind_Cb(), CID: 0x%04x Conf Needed",
|
|
p_ccb->local_cid);
|
|
(*p_ccb->p_rcb->api.pL2CA_DisconnectInd_Cb)(p_ccb->local_cid, true);
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_DATA: /* Peer data packet rcvd */
|
|
if ((p_ccb->p_rcb) && (p_ccb->p_rcb->api.pL2CA_DataInd_Cb))
|
|
(*p_ccb->p_rcb->api.pL2CA_DataInd_Cb)(p_ccb->local_cid,
|
|
(BT_HDR*)p_data);
|
|
break;
|
|
|
|
case L2CEVT_L2CA_DISCONNECT_REQ: /* Upper wants to disconnect */
|
|
if (p_ccb->p_lcb->transport != BT_TRANSPORT_LE) {
|
|
/* Make sure we are not in sniff mode */
|
|
{
|
|
tBTM_PM_PWR_MD settings;
|
|
memset((void*)&settings, 0, sizeof(settings));
|
|
settings.mode = BTM_PM_MD_ACTIVE;
|
|
BTM_SetPowerMode(BTM_PM_SET_ONLY_ID, p_ccb->p_lcb->remote_bd_addr,
|
|
&settings);
|
|
}
|
|
}
|
|
|
|
if (p_ccb->p_lcb->transport == BT_TRANSPORT_LE)
|
|
l2cble_send_peer_disc_req(p_ccb);
|
|
else
|
|
l2cu_send_peer_disc_req(p_ccb);
|
|
|
|
p_ccb->chnl_state = CST_W4_L2CAP_DISCONNECT_RSP;
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer, L2CAP_CHNL_DISCONNECT_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
break;
|
|
|
|
case L2CEVT_L2CA_DATA_WRITE: /* Upper layer data to send */
|
|
l2c_enqueue_peer_data(p_ccb, (BT_HDR*)p_data);
|
|
l2c_link_check_send_pkts(p_ccb->p_lcb, NULL, NULL);
|
|
break;
|
|
|
|
case L2CEVT_L2CA_CONFIG_REQ: /* Upper layer config req */
|
|
p_ccb->chnl_state = CST_CONFIG;
|
|
p_ccb->config_done &= ~CFG_DONE_MASK;
|
|
l2cu_process_our_cfg_req(p_ccb, (tL2CAP_CFG_INFO*)p_data);
|
|
l2cu_send_peer_config_req(p_ccb, (tL2CAP_CFG_INFO*)p_data);
|
|
alarm_set_on_mloop(p_ccb->l2c_ccb_timer, L2CAP_CHNL_CFG_TIMEOUT_MS,
|
|
l2c_ccb_timer_timeout, p_ccb);
|
|
break;
|
|
|
|
case L2CEVT_TIMEOUT:
|
|
/* Process the monitor/retransmission time-outs in flow control/retrans
|
|
* mode */
|
|
if (p_ccb->peer_cfg.fcr.mode == L2CAP_FCR_ERTM_MODE)
|
|
l2c_fcr_proc_tout(p_ccb);
|
|
break;
|
|
|
|
case L2CEVT_ACK_TIMEOUT:
|
|
l2c_fcr_proc_ack_tout(p_ccb);
|
|
break;
|
|
|
|
case L2CEVT_L2CA_SEND_FLOW_CONTROL_CREDIT:
|
|
L2CAP_TRACE_DEBUG("%s Sending credit", __func__);
|
|
credit = (uint16_t*)p_data;
|
|
l2cble_send_flow_control_credit(p_ccb, *credit);
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_RECV_FLOW_CONTROL_CREDIT:
|
|
credit = (uint16_t*)p_data;
|
|
L2CAP_TRACE_DEBUG("%s Credits received %d", __func__, *credit);
|
|
if ((p_ccb->peer_conn_cfg.credits + *credit) > L2CAP_LE_MAX_CREDIT) {
|
|
/* we have received credits more than max coc credits,
|
|
* so disconnecting the Le Coc Channel
|
|
*/
|
|
l2cble_send_peer_disc_req(p_ccb);
|
|
} else {
|
|
p_ccb->peer_conn_cfg.credits += *credit;
|
|
l2c_link_check_send_pkts(p_ccb->p_lcb, NULL, NULL);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function l2c_csm_w4_l2cap_disconnect_rsp
|
|
*
|
|
* Description This function handles events when the channel is in
|
|
* CST_W4_L2CAP_DISCONNECT_RSP state.
|
|
*
|
|
* Returns void
|
|
*
|
|
******************************************************************************/
|
|
static void l2c_csm_w4_l2cap_disconnect_rsp(tL2C_CCB* p_ccb, uint16_t event,
|
|
void* p_data) {
|
|
tL2CA_DISCONNECT_CFM_CB* disconnect_cfm =
|
|
p_ccb->p_rcb->api.pL2CA_DisconnectCfm_Cb;
|
|
uint16_t local_cid = p_ccb->local_cid;
|
|
|
|
L2CAP_TRACE_EVENT("L2CAP - LCID: 0x%04x st: W4_L2CAP_DISC_RSP evt: %s",
|
|
p_ccb->local_cid, l2c_csm_get_event_name(event));
|
|
|
|
switch (event) {
|
|
case L2CEVT_L2CAP_DISCONNECT_RSP: /* Peer disconnect response */
|
|
l2cu_release_ccb(p_ccb);
|
|
if (disconnect_cfm) {
|
|
L2CAP_TRACE_API("L2CAP - Calling DisconnectCfm_Cb(), CID: 0x%04x",
|
|
local_cid);
|
|
(*disconnect_cfm)(local_cid, L2CAP_DISC_OK);
|
|
}
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_DISCONNECT_REQ: /* Peer disconnect request */
|
|
l2cu_send_peer_disc_rsp(p_ccb->p_lcb, p_ccb->remote_id, p_ccb->local_cid,
|
|
p_ccb->remote_cid);
|
|
l2cu_release_ccb(p_ccb);
|
|
if (disconnect_cfm) {
|
|
L2CAP_TRACE_API("L2CAP - Calling DisconnectCfm_Cb(), CID: 0x%04x",
|
|
local_cid);
|
|
(*disconnect_cfm)(local_cid, L2CAP_DISC_OK);
|
|
}
|
|
break;
|
|
|
|
case L2CEVT_LP_DISCONNECT_IND: /* Link was disconnected */
|
|
case L2CEVT_TIMEOUT: /* Timeout */
|
|
l2cu_release_ccb(p_ccb);
|
|
if (disconnect_cfm) {
|
|
L2CAP_TRACE_API("L2CAP - Calling DisconnectCfm_Cb(), CID: 0x%04x",
|
|
local_cid);
|
|
(*disconnect_cfm)(local_cid, L2CAP_DISC_TIMEOUT);
|
|
}
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_DATA: /* Peer data packet rcvd */
|
|
case L2CEVT_L2CA_DATA_WRITE: /* Upper layer data to send */
|
|
osi_free(p_data);
|
|
break;
|
|
|
|
case L2CEVT_L2CA_SEND_FLOW_CONTROL_CREDIT:
|
|
case L2CEVT_L2CAP_RECV_FLOW_CONTROL_CREDIT:
|
|
osi_free(p_data);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function l2c_csm_w4_l2ca_disconnect_rsp
|
|
*
|
|
* Description This function handles events when the channel is in
|
|
* CST_W4_L2CA_DISCONNECT_RSP state.
|
|
*
|
|
* Returns void
|
|
*
|
|
******************************************************************************/
|
|
static void l2c_csm_w4_l2ca_disconnect_rsp(tL2C_CCB* p_ccb, uint16_t event,
|
|
void* p_data) {
|
|
tL2CA_DISCONNECT_IND_CB* disconnect_ind =
|
|
p_ccb->p_rcb->api.pL2CA_DisconnectInd_Cb;
|
|
uint16_t local_cid = p_ccb->local_cid;
|
|
|
|
L2CAP_TRACE_EVENT("L2CAP - LCID: 0x%04x st: W4_L2CA_DISC_RSP evt: %s",
|
|
p_ccb->local_cid, l2c_csm_get_event_name(event));
|
|
|
|
switch (event) {
|
|
case L2CEVT_LP_DISCONNECT_IND: /* Link was disconnected */
|
|
L2CAP_TRACE_API(
|
|
"L2CAP - Calling Disconnect_Ind_Cb(), CID: 0x%04x No Conf Needed",
|
|
p_ccb->local_cid);
|
|
l2cu_release_ccb(p_ccb);
|
|
(*disconnect_ind)(local_cid, false);
|
|
break;
|
|
|
|
case L2CEVT_TIMEOUT:
|
|
l2cu_send_peer_disc_rsp(p_ccb->p_lcb, p_ccb->remote_id, p_ccb->local_cid,
|
|
p_ccb->remote_cid);
|
|
L2CAP_TRACE_API(
|
|
"L2CAP - Calling Disconnect_Ind_Cb(), CID: 0x%04x No Conf Needed",
|
|
p_ccb->local_cid);
|
|
l2cu_release_ccb(p_ccb);
|
|
(*disconnect_ind)(local_cid, false);
|
|
break;
|
|
|
|
case L2CEVT_L2CA_DISCONNECT_REQ: /* Upper disconnect request */
|
|
case L2CEVT_L2CA_DISCONNECT_RSP: /* Upper disconnect response */
|
|
l2cu_send_peer_disc_rsp(p_ccb->p_lcb, p_ccb->remote_id, p_ccb->local_cid,
|
|
p_ccb->remote_cid);
|
|
l2cu_release_ccb(p_ccb);
|
|
break;
|
|
|
|
case L2CEVT_L2CAP_DATA: /* Peer data packet rcvd */
|
|
case L2CEVT_L2CA_DATA_WRITE: /* Upper layer data to send */
|
|
osi_free(p_data);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function l2c_csm_get_event_name
|
|
*
|
|
* Description This function returns the event name.
|
|
*
|
|
* NOTE conditionally compiled to save memory.
|
|
*
|
|
* Returns pointer to the name
|
|
*
|
|
******************************************************************************/
|
|
static const char* l2c_csm_get_event_name(uint16_t event) {
|
|
switch (event) {
|
|
case L2CEVT_LP_CONNECT_CFM: /* Lower layer connect confirm */
|
|
return ("LOWER_LAYER_CONNECT_CFM");
|
|
case L2CEVT_LP_CONNECT_CFM_NEG: /* Lower layer connect confirm (failed) */
|
|
return ("LOWER_LAYER_CONNECT_CFM_NEG");
|
|
case L2CEVT_LP_CONNECT_IND: /* Lower layer connect indication */
|
|
return ("LOWER_LAYER_CONNECT_IND");
|
|
case L2CEVT_LP_DISCONNECT_IND: /* Lower layer disconnect indication */
|
|
return ("LOWER_LAYER_DISCONNECT_IND");
|
|
case L2CEVT_LP_QOS_CFM: /* Lower layer QOS confirmation */
|
|
return ("LOWER_LAYER_QOS_CFM");
|
|
case L2CEVT_LP_QOS_CFM_NEG: /* Lower layer QOS confirmation (failed)*/
|
|
return ("LOWER_LAYER_QOS_CFM_NEG");
|
|
case L2CEVT_LP_QOS_VIOLATION_IND: /* Lower layer QOS violation indication */
|
|
return ("LOWER_LAYER_QOS_VIOLATION_IND");
|
|
|
|
case L2CEVT_SEC_COMP: /* Security cleared successfully */
|
|
return ("SECURITY_COMPLETE");
|
|
case L2CEVT_SEC_COMP_NEG: /* Security procedure failed */
|
|
return ("SECURITY_COMPLETE_NEG");
|
|
|
|
case L2CEVT_L2CAP_CONNECT_REQ: /* Peer connection request */
|
|
return ("PEER_CONNECT_REQ");
|
|
case L2CEVT_L2CAP_CONNECT_RSP: /* Peer connection response */
|
|
return ("PEER_CONNECT_RSP");
|
|
case L2CEVT_L2CAP_CONNECT_RSP_PND: /* Peer connection response pending */
|
|
return ("PEER_CONNECT_RSP_PND");
|
|
case L2CEVT_L2CAP_CONNECT_RSP_NEG: /* Peer connection response (failed) */
|
|
return ("PEER_CONNECT_RSP_NEG");
|
|
case L2CEVT_L2CAP_CONFIG_REQ: /* Peer configuration request */
|
|
return ("PEER_CONFIG_REQ");
|
|
case L2CEVT_L2CAP_CONFIG_RSP: /* Peer configuration response */
|
|
return ("PEER_CONFIG_RSP");
|
|
case L2CEVT_L2CAP_CONFIG_RSP_NEG: /* Peer configuration response (failed) */
|
|
return ("PEER_CONFIG_RSP_NEG");
|
|
case L2CEVT_L2CAP_DISCONNECT_REQ: /* Peer disconnect request */
|
|
return ("PEER_DISCONNECT_REQ");
|
|
case L2CEVT_L2CAP_DISCONNECT_RSP: /* Peer disconnect response */
|
|
return ("PEER_DISCONNECT_RSP");
|
|
case L2CEVT_L2CAP_DATA: /* Peer data */
|
|
return ("PEER_DATA");
|
|
|
|
case L2CEVT_L2CA_CONNECT_REQ: /* Upper layer connect request */
|
|
return ("UPPER_LAYER_CONNECT_REQ");
|
|
case L2CEVT_L2CA_CONNECT_RSP: /* Upper layer connect response */
|
|
return ("UPPER_LAYER_CONNECT_RSP");
|
|
case L2CEVT_L2CA_CONNECT_RSP_NEG: /* Upper layer connect response (failed)*/
|
|
return ("UPPER_LAYER_CONNECT_RSP_NEG");
|
|
case L2CEVT_L2CA_CONFIG_REQ: /* Upper layer config request */
|
|
return ("UPPER_LAYER_CONFIG_REQ");
|
|
case L2CEVT_L2CA_CONFIG_RSP: /* Upper layer config response */
|
|
return ("UPPER_LAYER_CONFIG_RSP");
|
|
case L2CEVT_L2CA_CONFIG_RSP_NEG: /* Upper layer config response (failed) */
|
|
return ("UPPER_LAYER_CONFIG_RSP_NEG");
|
|
case L2CEVT_L2CA_DISCONNECT_REQ: /* Upper layer disconnect request */
|
|
return ("UPPER_LAYER_DISCONNECT_REQ");
|
|
case L2CEVT_L2CA_DISCONNECT_RSP: /* Upper layer disconnect response */
|
|
return ("UPPER_LAYER_DISCONNECT_RSP");
|
|
case L2CEVT_L2CA_DATA_READ: /* Upper layer data read */
|
|
return ("UPPER_LAYER_DATA_READ");
|
|
case L2CEVT_L2CA_DATA_WRITE: /* Upper layer data write */
|
|
return ("UPPER_LAYER_DATA_WRITE");
|
|
case L2CEVT_TIMEOUT: /* Timeout */
|
|
return ("TIMEOUT");
|
|
case L2CEVT_SEC_RE_SEND_CMD:
|
|
return ("SEC_RE_SEND_CMD");
|
|
case L2CEVT_L2CAP_INFO_RSP: /* Peer information response */
|
|
return ("L2CEVT_L2CAP_INFO_RSP");
|
|
case L2CEVT_ACK_TIMEOUT:
|
|
return ("L2CEVT_ACK_TIMEOUT");
|
|
case L2CEVT_L2CA_SEND_FLOW_CONTROL_CREDIT: /* Upper layer send credit packet
|
|
*/
|
|
return ("SEND_FLOW_CONTROL_CREDIT");
|
|
case L2CEVT_L2CAP_RECV_FLOW_CONTROL_CREDIT: /* Peer send credit packet */
|
|
return ("RECV_FLOW_CONTROL_CREDIT");
|
|
|
|
default:
|
|
return ("???? UNKNOWN EVENT");
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function l2c_enqueue_peer_data
|
|
*
|
|
* Description Enqueues data destined for the peer in the ccb. Handles
|
|
* FCR segmentation and checks for congestion.
|
|
*
|
|
* Returns void
|
|
*
|
|
******************************************************************************/
|
|
void l2c_enqueue_peer_data(tL2C_CCB* p_ccb, BT_HDR* p_buf) {
|
|
uint8_t* p;
|
|
|
|
if (p_ccb->peer_cfg.fcr.mode != L2CAP_FCR_BASIC_MODE) {
|
|
p_buf->event = 0;
|
|
} else {
|
|
/* Save the channel ID for faster counting */
|
|
p_buf->event = p_ccb->local_cid;
|
|
|
|
/* Step back to add the L2CAP header */
|
|
p_buf->offset -= L2CAP_PKT_OVERHEAD;
|
|
p_buf->len += L2CAP_PKT_OVERHEAD;
|
|
|
|
/* Set the pointer to the beginning of the data */
|
|
p = (uint8_t*)(p_buf + 1) + p_buf->offset;
|
|
|
|
/* Now the L2CAP header */
|
|
UINT16_TO_STREAM(p, p_buf->len - L2CAP_PKT_OVERHEAD);
|
|
UINT16_TO_STREAM(p, p_ccb->remote_cid);
|
|
}
|
|
|
|
if (p_ccb->xmit_hold_q == NULL) {
|
|
L2CAP_TRACE_ERROR(
|
|
"%s: empty queue: p_ccb = %p p_ccb->in_use = %d p_ccb->chnl_state = %d "
|
|
"p_ccb->local_cid = %u p_ccb->remote_cid = %u",
|
|
__func__, p_ccb, p_ccb->in_use, p_ccb->chnl_state, p_ccb->local_cid,
|
|
p_ccb->remote_cid);
|
|
}
|
|
fixed_queue_enqueue(p_ccb->xmit_hold_q, p_buf);
|
|
|
|
l2cu_check_channel_congestion(p_ccb);
|
|
|
|
#if (L2CAP_ROUND_ROBIN_CHANNEL_SERVICE == TRUE)
|
|
/* if new packet is higher priority than serving ccb and it is not overrun */
|
|
if ((p_ccb->p_lcb->rr_pri > p_ccb->ccb_priority) &&
|
|
(p_ccb->p_lcb->rr_serv[p_ccb->ccb_priority].quota > 0)) {
|
|
/* send out higher priority packet */
|
|
p_ccb->p_lcb->rr_pri = p_ccb->ccb_priority;
|
|
}
|
|
#endif
|
|
|
|
/* if we are doing a round robin scheduling, set the flag */
|
|
if (p_ccb->p_lcb->link_xmit_quota == 0) l2cb.check_round_robin = true;
|
|
}
|