253 lines
8.5 KiB
C++
253 lines
8.5 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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#define LOG_TAG "NfcNciHal"
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#include "_OverrideLog.h"
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#include "gki.h"
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extern "C" {
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#include "nfc_hal_nv_ci.h"
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#include "nfc_hal_target.h"
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}
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <string>
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#include "CrcChecksum.h"
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#include "config.h"
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// directory of HAL's non-volatile storage
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static const char* default_location = "/data/nfc";
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static const char* filename_prefix = "/halStorage.bin";
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static const std::string get_storage_location();
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void delete_hal_non_volatile_store(bool forceDelete);
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void verify_hal_non_volatile_store();
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/*******************************************************************************
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**
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** Function nfc_hal_nv_co_read
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**
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** Description This function is called by NFA to read in data from the
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** previously opened file.
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**
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** Parameters p_buf - buffer to read the data into.
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** nbytes - number of bytes to read into the buffer.
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**
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** Returns void
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**
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** Note: Upon completion of the request, nfc_hal_nv_ci_read ()
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*is
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** called with the buffer of data, along with the number
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** of bytes read into the buffer, and a status. The
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** call-in function should only be called when ALL
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*requested
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** bytes have been read, the end of file has been
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*detected,
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** or an error has occurred.
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**
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*******************************************************************************/
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void nfc_hal_nv_co_read(uint8_t* p_buf, uint16_t nbytes, uint8_t block) {
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std::string fn = get_storage_location();
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char filename[256];
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fn.append(filename_prefix);
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if (fn.length() > 200) {
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ALOGE("%s: filename too long", __func__);
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return;
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}
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snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), block);
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ALOGD("%s: buffer len=%u; file=%s", __func__, nbytes, filename);
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int fileStream = open(filename, O_RDONLY);
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if (fileStream >= 0) {
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unsigned short checksum = 0;
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size_t actualReadCrc = read(fileStream, &checksum, sizeof(checksum));
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size_t actualReadData = read(fileStream, p_buf, nbytes);
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close(fileStream);
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if (actualReadData > 0) {
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ALOGD("%s: data size=%zu", __func__, actualReadData);
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nfc_hal_nv_ci_read(actualReadData, NFC_HAL_NV_CO_OK, block);
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} else {
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ALOGE("%s: fail to read", __func__);
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nfc_hal_nv_ci_read(0, NFC_HAL_NV_CO_FAIL, block);
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}
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} else {
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ALOGD("%s: fail to open", __func__);
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nfc_hal_nv_ci_read(0, NFC_HAL_NV_CO_FAIL, block);
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}
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}
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/*******************************************************************************
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**
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** Function nfc_hal_nv_co_write
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**
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** Description This function is called by io to send file data to the
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** phone.
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**
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** Parameters p_buf - buffer to read the data from.
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** nbytes - number of bytes to write out to the file.
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**
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** Returns void
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**
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** Note: Upon completion of the request, nfc_hal_nv_ci_write ()
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*is
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** called with the file descriptor and the status. The
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** call-in function should only be called when ALL
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*requested
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** bytes have been written, or an error has been
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*detected,
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**
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*******************************************************************************/
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void nfc_hal_nv_co_write(const uint8_t* p_buf, uint16_t nbytes, uint8_t block) {
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std::string fn = get_storage_location();
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char filename[256];
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int fileStream = 0;
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fn.append(filename_prefix);
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if (fn.length() > 200) {
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ALOGE("%s: filename too long", __func__);
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return;
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}
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snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), block);
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ALOGD("%s: bytes=%u; file=%s", __func__, nbytes, filename);
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fileStream = open(filename, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
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if (fileStream >= 0) {
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unsigned short checksum = crcChecksumCompute(p_buf, nbytes);
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size_t actualWrittenCrc = write(fileStream, &checksum, sizeof(checksum));
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size_t actualWrittenData = write(fileStream, p_buf, nbytes);
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ALOGD("%s: %zu bytes written", __func__, actualWrittenData);
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if ((actualWrittenData == nbytes) &&
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(actualWrittenCrc == sizeof(checksum))) {
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nfc_hal_nv_ci_write(NFC_HAL_NV_CO_OK);
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} else {
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ALOGE("%s: fail to write", __func__);
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nfc_hal_nv_ci_write(NFC_HAL_NV_CO_FAIL);
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}
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close(fileStream);
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} else {
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ALOGE("%s: fail to open, error = %d", __func__, errno);
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nfc_hal_nv_ci_write(NFC_HAL_NV_CO_FAIL);
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}
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}
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/*******************************************************************************
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**
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** Function get_storage_location
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**
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** Description Get the absolute directory path of the HAL's storage
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*location.
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**
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** Parameters none
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**
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** Returns Absolute path.
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**
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*******************************************************************************/
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const std::string get_storage_location() {
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char buffer[100];
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memset(buffer, 0, sizeof(buffer));
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if (!GetStrValue(NAME_NFA_STORAGE, buffer, sizeof(buffer)))
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return default_location;
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else
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return std::string(buffer);
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}
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/*******************************************************************************
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**
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** Function delete_hal_non_volatile_store
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**
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** Description Delete all the content of the HAL's storage location.
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**
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** Parameters forceDelete: unconditionally delete the storage.
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**
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** Returns none
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**
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*******************************************************************************/
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void delete_hal_non_volatile_store(bool forceDelete) {
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static bool firstTime = true;
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std::string fn = get_storage_location();
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char filename[256];
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int stat = 0;
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if ((firstTime == false) && (forceDelete == false)) return;
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firstTime = false;
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ALOGD("%s", __func__);
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fn.append(filename_prefix);
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if (fn.length() > 200) {
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ALOGE("%s: filename too long", __func__);
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return;
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}
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snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), DH_NV_BLOCK);
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remove(filename);
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snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), HC_F3_NV_BLOCK);
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remove(filename);
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snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), HC_F4_NV_BLOCK);
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remove(filename);
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snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), HC_F2_NV_BLOCK);
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remove(filename);
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snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), HC_F5_NV_BLOCK);
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remove(filename);
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}
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/*******************************************************************************
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**
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** Function verify_hal_non_volatile_store
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**
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** Description Verify the content of all non-volatile store.
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**
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** Parameters none
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**
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** Returns none
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**
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*******************************************************************************/
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void verify_hal_non_volatile_store() {
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ALOGD("%s", __func__);
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std::string fn = get_storage_location();
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char filename[256];
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bool isValid = false;
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fn.append(filename_prefix);
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if (fn.length() > 200) {
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ALOGE("%s: filename too long", __func__);
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return;
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}
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snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), DH_NV_BLOCK);
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if (crcChecksumVerifyIntegrity(filename)) {
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snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), HC_F3_NV_BLOCK);
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if (crcChecksumVerifyIntegrity(filename)) {
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snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), HC_F4_NV_BLOCK);
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if (crcChecksumVerifyIntegrity(filename)) {
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snprintf(filename, sizeof(filename), "%s%u", fn.c_str(),
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HC_F2_NV_BLOCK);
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if (crcChecksumVerifyIntegrity(filename)) {
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snprintf(filename, sizeof(filename), "%s%u", fn.c_str(),
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HC_F5_NV_BLOCK);
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if (crcChecksumVerifyIntegrity(filename)) isValid = true;
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}
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}
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}
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}
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if (isValid == false) delete_hal_non_volatile_store(true);
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}
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