/******************************************************************************
*
* Copyright (C) 2011-2012 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.
*
******************************************************************************/
#include <android-base/stringprintf.h>
#include <base/logging.h>
#include <fcntl.h>
#include <vector>
#include "CrcChecksum.h"
#include "nfa_nv_ci.h"
#include "nfc_hal_nv_co.h"
using android::base::StringPrintf;
extern std::string nfc_storage_path;
extern bool nfc_debug_enabled;
namespace {
std::string getFilenameForBlock(const unsigned block) {
std::string bin = "nfaStorage.bin";
return StringPrintf("%s/%s%u", nfc_storage_path.c_str(), bin.c_str(), block);
}
} // namespace
/*******************************************************************************
**
** Function nfa_mem_co_alloc
**
** Description allocate a buffer from platform's memory pool
**
** Returns:
** pointer to buffer if successful
** NULL otherwise
**
*******************************************************************************/
extern void* nfa_mem_co_alloc(uint32_t num_bytes) { return malloc(num_bytes); }
/*******************************************************************************
**
** Function nfa_mem_co_free
**
** Description free buffer previously allocated using nfa_mem_co_alloc
**
** Returns:
** Nothing
**
*******************************************************************************/
extern void nfa_mem_co_free(void* pBuffer) { free(pBuffer); }
/*******************************************************************************
**
** Function nfa_nv_co_read
**
** Description This function is called by NFA to read in data from the
** previously opened file.
**
** Parameters pBuffer - buffer to read the data into.
** nbytes - number of bytes to read into the buffer.
**
** Returns void
**
** Note: Upon completion of the request, nfa_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.
**
*******************************************************************************/
extern void nfa_nv_co_read(uint8_t* pBuffer, uint16_t nbytes, uint8_t block) {
std::string filename = getFilenameForBlock(block);
DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf(
"%s: buffer len=%u; file=%s", __func__, nbytes, filename.c_str());
int fileStream = open(filename.c_str(), O_RDONLY);
if (fileStream >= 0) {
unsigned short checksum = 0;
read(fileStream, &checksum, sizeof(checksum));
size_t actualReadData = read(fileStream, pBuffer, nbytes);
close(fileStream);
if (actualReadData > 0) {
DLOG_IF(INFO, nfc_debug_enabled)
<< StringPrintf("%s: data size=%zu", __func__, actualReadData);
nfa_nv_ci_read(actualReadData, NFA_NV_CO_OK, block);
} else {
LOG(ERROR) << StringPrintf("%s: fail to read", __func__);
nfa_nv_ci_read(0, NFA_NV_CO_FAIL, block);
}
} else {
DLOG_IF(INFO, nfc_debug_enabled)
<< StringPrintf("%s: fail to open", __func__);
nfa_nv_ci_read(0, NFA_NV_CO_FAIL, block);
}
}
/*******************************************************************************
**
** Function nfa_nv_co_write
**
** Description This function is called by io to send file data to the
** phone.
**
** Parameters pBuffer - buffer to read the data from.
** nbytes - number of bytes to write out to the file.
**
** Returns void
**
** Note: Upon completion of the request, nfa_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,
**
*******************************************************************************/
extern void nfa_nv_co_write(const uint8_t* pBuffer, uint16_t nbytes,
uint8_t block) {
std::string filename = getFilenameForBlock(block);
DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf(
"%s: bytes=%u; file=%s", __func__, nbytes, filename.c_str());
int fileStream =
open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
if (fileStream >= 0) {
unsigned short checksum = crcChecksumCompute(pBuffer, nbytes);
size_t actualWrittenCrc = write(fileStream, &checksum, sizeof(checksum));
size_t actualWrittenData = write(fileStream, pBuffer, nbytes);
DLOG_IF(INFO, nfc_debug_enabled)
<< StringPrintf("%s: %zu bytes written", __func__, actualWrittenData);
if ((actualWrittenData == nbytes) &&
(actualWrittenCrc == sizeof(checksum))) {
nfa_nv_ci_write(NFA_NV_CO_OK);
} else {
LOG(ERROR) << StringPrintf("%s: fail to write", __func__);
nfa_nv_ci_write(NFA_NV_CO_FAIL);
}
close(fileStream);
} else {
LOG(ERROR) << StringPrintf("%s: fail to open, error = %d", __func__, errno);
nfa_nv_ci_write(NFA_NV_CO_FAIL);
}
}
/*******************************************************************************
**
** Function delete_stack_non_volatile_store
**
** Description Delete all the content of the stack's storage location.
**
** Parameters forceDelete: unconditionally delete the storage.
**
** Returns none
**
*******************************************************************************/
void delete_stack_non_volatile_store(bool forceDelete) {
static bool firstTime = true;
if ((firstTime == false) && (forceDelete == false)) return;
firstTime = false;
DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf("%s", __func__);
remove(getFilenameForBlock(DH_NV_BLOCK).c_str());
remove(getFilenameForBlock(HC_F2_NV_BLOCK).c_str());
remove(getFilenameForBlock(HC_F3_NV_BLOCK).c_str());
remove(getFilenameForBlock(HC_F4_NV_BLOCK).c_str());
remove(getFilenameForBlock(HC_F5_NV_BLOCK).c_str());
}
/*******************************************************************************
**
** Function verify_stack_non_volatile_store
**
** Description Verify the content of all non-volatile store.
**
** Parameters none
**
** Returns none
**
*******************************************************************************/
void verify_stack_non_volatile_store() {
DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf("%s", __func__);
const std::vector<unsigned> verify_blocks = {DH_NV_BLOCK, HC_F2_NV_BLOCK,
HC_F3_NV_BLOCK, HC_F4_NV_BLOCK,
HC_F5_NV_BLOCK};
size_t verified = 0;
for (auto block : verify_blocks) {
if (!crcChecksumVerifyIntegrity(getFilenameForBlock(block).c_str())) break;
++verified;
}
if (verified != verify_blocks.size()) delete_stack_non_volatile_store(true);
}