538 lines
18 KiB
C++
538 lines
18 KiB
C++
/******************************************************************************
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*
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* Copyright (C) 2009-2012 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 is the implementation file for the MCAP at L2CAP Interface.
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*
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******************************************************************************/
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#include <string.h>
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#include "bt_target.h"
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#include "bt_utils.h"
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#include "btm_api.h"
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#include "btm_int.h"
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#include "mca_api.h"
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#include "mca_defs.h"
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#include "mca_int.h"
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#include "osi/include/osi.h"
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/* L2CAP callback function structure */
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const tL2CAP_APPL_INFO mca_l2c_int_appl = {NULL,
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mca_l2c_connect_cfm_cback,
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NULL,
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mca_l2c_config_ind_cback,
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mca_l2c_config_cfm_cback,
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mca_l2c_disconnect_ind_cback,
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mca_l2c_disconnect_cfm_cback,
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NULL,
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mca_l2c_data_ind_cback,
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mca_l2c_congestion_ind_cback,
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NULL};
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/* Control channel eL2CAP default options */
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const tL2CAP_FCR_OPTS mca_l2c_fcr_opts_def = {
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L2CAP_FCR_ERTM_MODE, /* Mandatory for MCAP */
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MCA_FCR_OPT_TX_WINDOW_SIZE, /* Tx window size */
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MCA_FCR_OPT_MAX_TX_B4_DISCNT, /* Maximum transmissions before
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disconnecting */
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MCA_FCR_OPT_RETX_TOUT, /* Retransmission timeout (2 secs) */
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MCA_FCR_OPT_MONITOR_TOUT, /* Monitor timeout (12 secs) */
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MCA_FCR_OPT_MPS_SIZE /* MPS segment size */
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};
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/*******************************************************************************
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*
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* Function mca_sec_check_complete_term
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*
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* Description The function called when Security Manager finishes
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* verification of the service side connection
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*
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* Returns void
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*
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******************************************************************************/
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static void mca_sec_check_complete_term(const RawAddress* bd_addr,
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UNUSED_ATTR tBT_TRANSPORT transport,
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void* p_ref_data, uint8_t res) {
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tMCA_TC_TBL* p_tbl = (tMCA_TC_TBL*)p_ref_data;
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tL2CAP_CFG_INFO cfg;
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tL2CAP_ERTM_INFO ertm_info;
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MCA_TRACE_DEBUG("mca_sec_check_complete_term res: %d", res);
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if (res == BTM_SUCCESS) {
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MCA_TRACE_DEBUG("lcid:x%x id:x%x", p_tbl->lcid, p_tbl->id);
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/* Set the FCR options: control channel mandates ERTM */
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ertm_info.preferred_mode = mca_l2c_fcr_opts_def.mode;
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ertm_info.allowed_modes = L2CAP_FCR_CHAN_OPT_ERTM;
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ertm_info.user_rx_buf_size = MCA_USER_RX_BUF_SIZE;
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ertm_info.user_tx_buf_size = MCA_USER_TX_BUF_SIZE;
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ertm_info.fcr_rx_buf_size = MCA_FCR_RX_BUF_SIZE;
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ertm_info.fcr_tx_buf_size = MCA_FCR_TX_BUF_SIZE;
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/* Send response to the L2CAP layer. */
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L2CA_ErtmConnectRsp(*bd_addr, p_tbl->id, p_tbl->lcid, L2CAP_CONN_OK,
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L2CAP_CONN_OK, &ertm_info);
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/* transition to configuration state */
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p_tbl->state = MCA_TC_ST_CFG;
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/* Send L2CAP config req */
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mca_set_cfg_by_tbl(&cfg, p_tbl);
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L2CA_ConfigReq(p_tbl->lcid, &cfg);
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} else {
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L2CA_ConnectRsp(*bd_addr, p_tbl->id, p_tbl->lcid, L2CAP_CONN_SECURITY_BLOCK,
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L2CAP_CONN_OK);
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mca_tc_close_ind(p_tbl, L2CAP_CONN_SECURITY_BLOCK);
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}
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}
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/*******************************************************************************
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*
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* Function mca_sec_check_complete_orig
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*
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* Description The function called when Security Manager finishes
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* verification of the service side connection
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*
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* Returns void
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*
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******************************************************************************/
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static void mca_sec_check_complete_orig(UNUSED_ATTR const RawAddress* bd_addr,
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UNUSED_ATTR tBT_TRANSPORT transport,
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void* p_ref_data, uint8_t res) {
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tMCA_TC_TBL* p_tbl = (tMCA_TC_TBL*)p_ref_data;
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tL2CAP_CFG_INFO cfg;
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MCA_TRACE_DEBUG("mca_sec_check_complete_orig res: %d", res);
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if (res == BTM_SUCCESS) {
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/* set channel state */
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p_tbl->state = MCA_TC_ST_CFG;
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/* Send L2CAP config req */
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mca_set_cfg_by_tbl(&cfg, p_tbl);
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L2CA_ConfigReq(p_tbl->lcid, &cfg);
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} else {
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L2CA_DisconnectReq(p_tbl->lcid);
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mca_tc_close_ind(p_tbl, L2CAP_CONN_SECURITY_BLOCK);
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}
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}
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/*******************************************************************************
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*
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* Function mca_l2c_cconn_ind_cback
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*
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* Description This is the L2CAP connect indication callback function.
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*
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* Returns void
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*
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******************************************************************************/
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void mca_l2c_cconn_ind_cback(const RawAddress& bd_addr, uint16_t lcid,
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uint16_t psm, uint8_t id) {
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tMCA_HANDLE handle = mca_handle_by_cpsm(psm);
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tMCA_CCB* p_ccb;
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tMCA_TC_TBL* p_tbl = NULL;
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uint16_t result = L2CAP_CONN_NO_RESOURCES;
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tBTM_STATUS rc;
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tL2CAP_ERTM_INFO ertm_info, *p_ertm_info = NULL;
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tL2CAP_CFG_INFO cfg;
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MCA_TRACE_EVENT("mca_l2c_cconn_ind_cback: lcid:x%x psm:x%x id:x%x", lcid, psm,
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id);
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/* do we already have a control channel for this peer? */
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p_ccb = mca_ccb_by_bd(handle, bd_addr);
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if (p_ccb == NULL) {
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/* no, allocate ccb */
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p_ccb = mca_ccb_alloc(handle, bd_addr);
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if (p_ccb != NULL) {
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/* allocate and set up entry */
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p_ccb->lcid = lcid;
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p_tbl = mca_tc_tbl_calloc(p_ccb);
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p_tbl->id = id;
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p_tbl->cfg_flags = MCA_L2C_CFG_CONN_ACP;
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/* proceed with connection */
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/* Check the security */
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rc = btm_sec_mx_access_request(bd_addr, psm, false, BTM_SEC_PROTO_MCA, 0,
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&mca_sec_check_complete_term, p_tbl);
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if (rc == BTM_CMD_STARTED) {
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/* Set the FCR options: control channel mandates ERTM */
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ertm_info.preferred_mode = mca_l2c_fcr_opts_def.mode;
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ertm_info.allowed_modes = L2CAP_FCR_CHAN_OPT_ERTM;
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ertm_info.user_rx_buf_size = MCA_USER_RX_BUF_SIZE;
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ertm_info.user_tx_buf_size = MCA_USER_TX_BUF_SIZE;
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ertm_info.fcr_rx_buf_size = MCA_FCR_RX_BUF_SIZE;
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ertm_info.fcr_tx_buf_size = MCA_FCR_TX_BUF_SIZE;
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p_ertm_info = &ertm_info;
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result = L2CAP_CONN_PENDING;
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} else
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result = L2CAP_CONN_OK;
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}
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/* deal with simultaneous control channel connect case */
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}
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/* else reject their connection */
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if (!p_tbl || (p_tbl->state != MCA_TC_ST_CFG)) {
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/* Send L2CAP connect rsp */
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L2CA_ErtmConnectRsp(bd_addr, id, lcid, result, L2CAP_CONN_OK, p_ertm_info);
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/* if result ok, proceed with connection and send L2CAP
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config req */
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if (result == L2CAP_CONN_OK) {
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/* set channel state */
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p_tbl->state = MCA_TC_ST_CFG;
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/* Send L2CAP config req */
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mca_set_cfg_by_tbl(&cfg, p_tbl);
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L2CA_ConfigReq(p_tbl->lcid, &cfg);
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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 mca_l2c_dconn_ind_cback
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*
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* Description This is the L2CAP connect indication callback function.
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*
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*
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* Returns void
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*
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******************************************************************************/
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void mca_l2c_dconn_ind_cback(const RawAddress& bd_addr, uint16_t lcid,
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uint16_t psm, uint8_t id) {
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tMCA_HANDLE handle = mca_handle_by_dpsm(psm);
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tMCA_CCB* p_ccb;
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tMCA_DCB* p_dcb;
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tMCA_TC_TBL* p_tbl = NULL;
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uint16_t result;
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tL2CAP_CFG_INFO cfg;
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tL2CAP_ERTM_INFO *p_ertm_info = NULL, ertm_info;
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const tMCA_CHNL_CFG* p_chnl_cfg;
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MCA_TRACE_EVENT("mca_l2c_dconn_ind_cback: lcid:x%x psm:x%x ", lcid, psm);
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if (((p_ccb = mca_ccb_by_bd(handle, bd_addr)) != NULL) && /* find the CCB */
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(p_ccb->status ==
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MCA_CCB_STAT_PENDING) && /* this CCB is expecting a MDL */
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(p_ccb->p_tx_req &&
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(p_dcb = mca_dcb_by_hdl(p_ccb->p_tx_req->dcb_idx)) != NULL)) {
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/* found the associated dcb in listening mode */
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/* proceed with connection */
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p_dcb->lcid = lcid;
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p_tbl = mca_tc_tbl_dalloc(p_dcb);
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p_tbl->id = id;
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p_tbl->cfg_flags = MCA_L2C_CFG_CONN_ACP;
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p_chnl_cfg = p_dcb->p_chnl_cfg;
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/* assume that control channel has verified the security requirement */
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/* Set the FCR options: control channel mandates ERTM */
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ertm_info.preferred_mode = p_chnl_cfg->fcr_opt.mode;
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ertm_info.allowed_modes = (1 << p_chnl_cfg->fcr_opt.mode);
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ertm_info.user_rx_buf_size = p_chnl_cfg->user_rx_buf_size;
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ertm_info.user_tx_buf_size = p_chnl_cfg->user_tx_buf_size;
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ertm_info.fcr_rx_buf_size = p_chnl_cfg->fcr_rx_buf_size;
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ertm_info.fcr_tx_buf_size = p_chnl_cfg->fcr_tx_buf_size;
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p_ertm_info = &ertm_info;
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result = L2CAP_CONN_OK;
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} else {
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/* else we're not listening for traffic channel; reject
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* (this error code is specified by MCAP spec) */
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result = L2CAP_CONN_NO_RESOURCES;
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}
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/* Send L2CAP connect rsp */
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L2CA_ErtmConnectRsp(bd_addr, id, lcid, result, result, p_ertm_info);
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/* if result ok, proceed with connection */
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if (result == L2CAP_CONN_OK) {
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/* transition to configuration state */
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p_tbl->state = MCA_TC_ST_CFG;
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/* Send L2CAP config req */
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mca_set_cfg_by_tbl(&cfg, p_tbl);
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L2CA_ConfigReq(lcid, &cfg);
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}
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}
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/*******************************************************************************
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*
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* Function mca_l2c_connect_cfm_cback
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*
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* Description This is the L2CAP connect confirm callback function.
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*
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*
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* Returns void
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*
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******************************************************************************/
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void mca_l2c_connect_cfm_cback(uint16_t lcid, uint16_t result) {
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tMCA_TC_TBL* p_tbl;
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tL2CAP_CFG_INFO cfg;
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tMCA_CCB* p_ccb;
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MCA_TRACE_DEBUG("mca_l2c_connect_cfm_cback lcid: x%x, result: %d", lcid,
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result);
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/* look up info for this channel */
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p_tbl = mca_tc_tbl_by_lcid(lcid);
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if (p_tbl != NULL) {
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MCA_TRACE_DEBUG("p_tbl state: %d, tcid: %d", p_tbl->state, p_tbl->tcid);
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/* if in correct state */
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if (p_tbl->state == MCA_TC_ST_CONN) {
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/* if result successful */
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if (result == L2CAP_CONN_OK) {
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if (p_tbl->tcid != 0) {
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/* set channel state */
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p_tbl->state = MCA_TC_ST_CFG;
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/* Send L2CAP config req */
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mca_set_cfg_by_tbl(&cfg, p_tbl);
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L2CA_ConfigReq(lcid, &cfg);
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} else {
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p_ccb = mca_ccb_by_hdl((tMCA_CL)p_tbl->cb_idx);
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if (p_ccb == NULL) {
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result = L2CAP_CONN_NO_RESOURCES;
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} else {
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/* set channel state */
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p_tbl->state = MCA_TC_ST_SEC_INT;
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p_tbl->lcid = lcid;
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p_tbl->cfg_flags = MCA_L2C_CFG_CONN_INT;
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/* Check the security */
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btm_sec_mx_access_request(p_ccb->peer_addr, p_ccb->ctrl_vpsm, true,
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BTM_SEC_PROTO_MCA, p_tbl->tcid,
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&mca_sec_check_complete_orig, p_tbl);
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}
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}
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}
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/* failure; notify adaption that channel closed */
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if (result != L2CAP_CONN_OK) {
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p_tbl->cfg_flags |= MCA_L2C_CFG_DISCN_INT;
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mca_tc_close_ind(p_tbl, result);
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}
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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 mca_l2c_config_cfm_cback
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*
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* Description This is the L2CAP config confirm callback function.
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*
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*
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* Returns void
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*
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******************************************************************************/
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void mca_l2c_config_cfm_cback(uint16_t lcid, tL2CAP_CFG_INFO* p_cfg) {
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tMCA_TC_TBL* p_tbl;
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/* look up info for this channel */
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p_tbl = mca_tc_tbl_by_lcid(lcid);
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if (p_tbl != NULL) {
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/* if in correct state */
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if (p_tbl->state == MCA_TC_ST_CFG) {
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/* if result successful */
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if (p_cfg->result == L2CAP_CONN_OK) {
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/* update cfg_flags */
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p_tbl->cfg_flags |= MCA_L2C_CFG_CFM_DONE;
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/* if configuration complete */
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if (p_tbl->cfg_flags & MCA_L2C_CFG_IND_DONE) {
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mca_tc_open_ind(p_tbl);
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}
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}
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/* else failure */
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else {
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/* Send L2CAP disconnect req */
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L2CA_DisconnectReq(lcid);
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}
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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 mca_l2c_config_ind_cback
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*
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* Description This is the L2CAP config indication callback function.
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*
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*
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* Returns void
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*
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******************************************************************************/
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void mca_l2c_config_ind_cback(uint16_t lcid, tL2CAP_CFG_INFO* p_cfg) {
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tMCA_TC_TBL* p_tbl;
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uint16_t result = L2CAP_CFG_OK;
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/* look up info for this channel */
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p_tbl = mca_tc_tbl_by_lcid(lcid);
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if (p_tbl != NULL) {
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/* store the mtu in tbl */
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if (p_cfg->mtu_present) {
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p_tbl->peer_mtu = p_cfg->mtu;
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if (p_tbl->peer_mtu < MCA_MIN_MTU) {
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result = L2CAP_CFG_UNACCEPTABLE_PARAMS;
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}
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} else {
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p_tbl->peer_mtu = L2CAP_DEFAULT_MTU;
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}
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MCA_TRACE_DEBUG("peer_mtu: %d, lcid: x%x mtu_present:%d", p_tbl->peer_mtu,
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lcid, p_cfg->mtu_present);
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/* send L2CAP configure response */
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memset(p_cfg, 0, sizeof(tL2CAP_CFG_INFO));
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p_cfg->result = result;
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L2CA_ConfigRsp(lcid, p_cfg);
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/* if first config ind */
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if ((p_tbl->cfg_flags & MCA_L2C_CFG_IND_DONE) == 0) {
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/* update cfg_flags */
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p_tbl->cfg_flags |= MCA_L2C_CFG_IND_DONE;
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/* if configuration complete */
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if (p_tbl->cfg_flags & MCA_L2C_CFG_CFM_DONE) {
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mca_tc_open_ind(p_tbl);
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}
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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 mca_l2c_disconnect_ind_cback
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*
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* Description This is the L2CAP disconnect indication callback function.
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*
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*
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* Returns void
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*
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******************************************************************************/
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void mca_l2c_disconnect_ind_cback(uint16_t lcid, bool ack_needed) {
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tMCA_TC_TBL* p_tbl;
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uint16_t reason = L2CAP_DISC_TIMEOUT;
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MCA_TRACE_DEBUG("mca_l2c_disconnect_ind_cback lcid: %d, ack_needed: %d", lcid,
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ack_needed);
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/* look up info for this channel */
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p_tbl = mca_tc_tbl_by_lcid(lcid);
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if (p_tbl != NULL) {
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if (ack_needed) {
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/* send L2CAP disconnect response */
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L2CA_DisconnectRsp(lcid);
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}
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p_tbl->cfg_flags = MCA_L2C_CFG_DISCN_ACP;
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if (ack_needed) reason = L2CAP_DISC_OK;
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mca_tc_close_ind(p_tbl, reason);
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}
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}
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/*******************************************************************************
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*
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* Function mca_l2c_disconnect_cfm_cback
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*
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* Description This is the L2CAP disconnect confirm callback function.
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*
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*
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* Returns void
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|
*
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******************************************************************************/
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void mca_l2c_disconnect_cfm_cback(uint16_t lcid, uint16_t result) {
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tMCA_TC_TBL* p_tbl;
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|
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MCA_TRACE_DEBUG("mca_l2c_disconnect_cfm_cback lcid: x%x, result: %d", lcid,
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|
result);
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/* look up info for this channel */
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|
p_tbl = mca_tc_tbl_by_lcid(lcid);
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|
if (p_tbl != NULL) {
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p_tbl->cfg_flags = MCA_L2C_CFG_DISCN_INT;
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|
mca_tc_close_ind(p_tbl, result);
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}
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|
}
|
|
|
|
/*******************************************************************************
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|
*
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|
* Function mca_l2c_congestion_ind_cback
|
|
*
|
|
* Description This is the L2CAP congestion indication callback function.
|
|
*
|
|
*
|
|
* Returns void
|
|
*
|
|
******************************************************************************/
|
|
void mca_l2c_congestion_ind_cback(uint16_t lcid, bool is_congested) {
|
|
tMCA_TC_TBL* p_tbl;
|
|
|
|
/* look up info for this channel */
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|
p_tbl = mca_tc_tbl_by_lcid(lcid);
|
|
if (p_tbl != NULL) {
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|
mca_tc_cong_ind(p_tbl, is_congested);
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function mca_l2c_data_ind_cback
|
|
*
|
|
* Description This is the L2CAP data indication callback function.
|
|
*
|
|
*
|
|
* Returns void
|
|
*
|
|
******************************************************************************/
|
|
void mca_l2c_data_ind_cback(uint16_t lcid, BT_HDR* p_buf) {
|
|
tMCA_TC_TBL* p_tbl;
|
|
|
|
/* look up info for this channel */
|
|
p_tbl = mca_tc_tbl_by_lcid(lcid);
|
|
if (p_tbl != NULL) {
|
|
mca_tc_data_ind(p_tbl, p_buf);
|
|
} else /* prevent buffer leak */
|
|
osi_free(p_buf);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* Function mca_l2c_open_req
|
|
*
|
|
* Description This function calls L2CA_ConnectReq() to initiate a L2CAP
|
|
* channel.
|
|
*
|
|
* Returns void.
|
|
*
|
|
******************************************************************************/
|
|
uint16_t mca_l2c_open_req(const RawAddress& bd_addr, uint16_t psm,
|
|
const tMCA_CHNL_CFG* p_chnl_cfg) {
|
|
tL2CAP_ERTM_INFO ertm_info;
|
|
|
|
if (p_chnl_cfg) {
|
|
ertm_info.preferred_mode = p_chnl_cfg->fcr_opt.mode;
|
|
ertm_info.allowed_modes = (1 << p_chnl_cfg->fcr_opt.mode);
|
|
ertm_info.user_rx_buf_size = p_chnl_cfg->user_rx_buf_size;
|
|
ertm_info.user_tx_buf_size = p_chnl_cfg->user_tx_buf_size;
|
|
ertm_info.fcr_rx_buf_size = p_chnl_cfg->fcr_rx_buf_size;
|
|
ertm_info.fcr_tx_buf_size = p_chnl_cfg->fcr_tx_buf_size;
|
|
} else {
|
|
ertm_info.preferred_mode = mca_l2c_fcr_opts_def.mode;
|
|
ertm_info.allowed_modes = L2CAP_FCR_CHAN_OPT_ERTM;
|
|
ertm_info.user_rx_buf_size = MCA_USER_RX_BUF_SIZE;
|
|
ertm_info.user_tx_buf_size = MCA_USER_TX_BUF_SIZE;
|
|
ertm_info.fcr_rx_buf_size = MCA_FCR_RX_BUF_SIZE;
|
|
ertm_info.fcr_tx_buf_size = MCA_FCR_TX_BUF_SIZE;
|
|
}
|
|
return L2CA_ErtmConnectReq(psm, bd_addr, &ertm_info);
|
|
}
|