/******************************************************************************
*
* Copyright (C) 1999-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
#define LOG_TAG "NfcNciHal"
#include "_OverrideLog.h"
#include "gki.h"
extern "C" {
#include "nfc_hal_nv_ci.h"
#include "nfc_hal_target.h"
}
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <string>
#include "CrcChecksum.h"
#include "config.h"
// directory of HAL's non-volatile storage
static const char* default_location = "/data/nfc";
static const char* filename_prefix = "/halStorage.bin";
static const std::string get_storage_location();
void delete_hal_non_volatile_store(bool forceDelete);
void verify_hal_non_volatile_store();
/*******************************************************************************
**
** Function nfc_hal_nv_co_read
**
** Description This function is called by NFA to read in data from the
** previously opened file.
**
** Parameters p_buf - buffer to read the data into.
** nbytes - number of bytes to read into the buffer.
**
** Returns void
**
** Note: Upon completion of the request, nfc_hal_nv_ci_read ()
*is
** called with the buffer of data, along with the number
** of bytes read into the buffer, and a status. The
** call-in function should only be called when ALL
*requested
** bytes have been read, the end of file has been
*detected,
** or an error has occurred.
**
*******************************************************************************/
void nfc_hal_nv_co_read(uint8_t* p_buf, uint16_t nbytes, uint8_t block) {
std::string fn = get_storage_location();
char filename[256];
fn.append(filename_prefix);
if (fn.length() > 200) {
ALOGE("%s: filename too long", __func__);
return;
}
snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), block);
ALOGD("%s: buffer len=%u; file=%s", __func__, nbytes, filename);
int fileStream = open(filename, O_RDONLY);
if (fileStream >= 0) {
unsigned short checksum = 0;
size_t actualReadCrc = read(fileStream, &checksum, sizeof(checksum));
size_t actualReadData = read(fileStream, p_buf, nbytes);
close(fileStream);
if (actualReadData > 0) {
ALOGD("%s: data size=%u", __func__, actualReadData);
nfc_hal_nv_ci_read(actualReadData, NFC_HAL_NV_CO_OK, block);
} else {
ALOGE("%s: fail to read", __func__);
nfc_hal_nv_ci_read(0, NFC_HAL_NV_CO_FAIL, block);
}
} else {
ALOGD("%s: fail to open", __func__);
nfc_hal_nv_ci_read(0, NFC_HAL_NV_CO_FAIL, block);
}
}
/*******************************************************************************
**
** Function nfc_hal_nv_co_write
**
** Description This function is called by io to send file data to the
** phone.
**
** Parameters p_buf - buffer to read the data from.
** nbytes - number of bytes to write out to the file.
**
** Returns void
**
** Note: Upon completion of the request, nfc_hal_nv_ci_write ()
*is
** called with the file descriptor and the status. The
** call-in function should only be called when ALL
*requested
** bytes have been written, or an error has been
*detected,
**
*******************************************************************************/
void nfc_hal_nv_co_write(const uint8_t* p_buf, uint16_t nbytes, uint8_t block) {
std::string fn = get_storage_location();
char filename[256];
int fileStream = 0;
fn.append(filename_prefix);
if (fn.length() > 200) {
ALOGE("%s: filename too long", __func__);
return;
}
snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), block);
ALOGD("%s: bytes=%u; file=%s", __func__, nbytes, filename);
fileStream = open(filename, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
if (fileStream >= 0) {
unsigned short checksum = crcChecksumCompute(p_buf, nbytes);
size_t actualWrittenCrc = write(fileStream, &checksum, sizeof(checksum));
size_t actualWrittenData = write(fileStream, p_buf, nbytes);
ALOGD("%s: %d bytes written", __func__, actualWrittenData);
if ((actualWrittenData == nbytes) &&
(actualWrittenCrc == sizeof(checksum))) {
nfc_hal_nv_ci_write(NFC_HAL_NV_CO_OK);
} else {
ALOGE("%s: fail to write", __func__);
nfc_hal_nv_ci_write(NFC_HAL_NV_CO_FAIL);
}
close(fileStream);
} else {
ALOGE("%s: fail to open, error = %d", __func__, errno);
nfc_hal_nv_ci_write(NFC_HAL_NV_CO_FAIL);
}
}
/*******************************************************************************
**
** Function get_storage_location
**
** Description Get the absolute directory path of the HAL's storage
*location.
**
** Parameters none
**
** Returns Absolute path.
**
*******************************************************************************/
const std::string get_storage_location() {
char buffer[100];
memset(buffer, 0, sizeof(buffer));
if (!GetStrValue(NAME_NFA_STORAGE, buffer, sizeof(buffer)))
return default_location;
else
return std::string(buffer);
}
/*******************************************************************************
**
** Function delete_hal_non_volatile_store
**
** Description Delete all the content of the HAL's storage location.
**
** Parameters forceDelete: unconditionally delete the storage.
**
** Returns none
**
*******************************************************************************/
void delete_hal_non_volatile_store(bool forceDelete) {
static bool firstTime = true;
std::string fn = get_storage_location();
char filename[256];
int stat = 0;
if ((firstTime == false) && (forceDelete == false)) return;
firstTime = false;
ALOGD("%s", __func__);
fn.append(filename_prefix);
if (fn.length() > 200) {
ALOGE("%s: filename too long", __func__);
return;
}
snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), DH_NV_BLOCK);
remove(filename);
snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), HC_F3_NV_BLOCK);
remove(filename);
snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), HC_F4_NV_BLOCK);
remove(filename);
snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), HC_F2_NV_BLOCK);
remove(filename);
snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), HC_F5_NV_BLOCK);
remove(filename);
}
/*******************************************************************************
**
** Function verify_hal_non_volatile_store
**
** Description Verify the content of all non-volatile store.
**
** Parameters none
**
** Returns none
**
*******************************************************************************/
void verify_hal_non_volatile_store() {
ALOGD("%s", __func__);
std::string fn = get_storage_location();
char filename[256];
bool isValid = false;
fn.append(filename_prefix);
if (fn.length() > 200) {
ALOGE("%s: filename too long", __func__);
return;
}
snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), DH_NV_BLOCK);
if (crcChecksumVerifyIntegrity(filename)) {
snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), HC_F3_NV_BLOCK);
if (crcChecksumVerifyIntegrity(filename)) {
snprintf(filename, sizeof(filename), "%s%u", fn.c_str(), HC_F4_NV_BLOCK);
if (crcChecksumVerifyIntegrity(filename)) {
snprintf(filename, sizeof(filename), "%s%u", fn.c_str(),
HC_F2_NV_BLOCK);
if (crcChecksumVerifyIntegrity(filename)) {
snprintf(filename, sizeof(filename), "%s%u", fn.c_str(),
HC_F5_NV_BLOCK);
if (crcChecksumVerifyIntegrity(filename)) isValid = true;
}
}
}
}
if (isValid == false) delete_hal_non_volatile_store(true);
}