uint32_t compute_checksum(uint32_t(*calculate_crc)(const uint8_t* data, uint32_t len), const uint8_t* server, size_t server_len, const uint8_t* device, size_t device_len)
{
uint32_t sum[2];
sum[0] = calculate_crc(server, server_len);
sum[1] = calculate_crc(device, device_len);
uint32_t result = calculate_crc((uint8_t*)&sum, sizeof(sum));
return result;
}
int store_iap(const void *pbuf,unsigned short len)
{
unsigned int addr;
if(icount.size+len>CODE_SIZE){
//PrintLog(LOGTYPE_SHORT,"iap flash overflow\n");
return -1;
}
if(icount.records>=UPDATE_RECORDS){
//PrintLog(LOGTYPE_SHORT,"iap records overflow\n");
return -1;
}
//代码写到Flash-------------------------------------------------------------
addr = UPDATE_CODE_ADDR+icount.size;
flash_program(addr,pbuf,len);
//写记录数据----------------------------------------------------------------
irecord.offset = icount.size;
irecord.bytes = len;
irecord.codecrc = calculate_crc(pbuf,len);
addr = UPDATE_RECORD_ADDR;
addr = UPDATE_RECORD_ADDR+UPDATE_RECORD_SIZE*icount.records;
f_program(addr,&irecord,sizeof(irecord));
icount.size+=len;
icount.records++;
//PrintLog(LOGTYPE_SHORT,"save code frame:%d,size:%d",icount.records,icount.size);
return 0;
}
void SendDataccTalk(uint8_t slave,uint8_t numberdata,uint8_t master,uint8_t command,uint8_t *data){
uint8_t i;
uint8_t checksum=0;
cctalk.FlagReceiveData=0;
cctalk.PointerEcho = 5+numberdata;
CleanBufferInput();
while(AS_CCTALK_SendChar(slave)!=ERR_OK);
while(AS_CCTALK_SendChar(numberdata)!=ERR_OK);
while(AS_CCTALK_SendChar(master)!=ERR_OK);
while(AS_CCTALK_SendChar(command)!=ERR_OK);
if(numberdata){
for(i=0;i<numberdata;i++){
while(AS_CCTALK_SendChar(data[i])!=ERR_OK);
}
}
checksum=calculate_crc(slave,master,command,numberdata,data);
while(AS_CCTALK_SendChar(checksum)!=ERR_OK);
}
uint16
Volume::_GroupCheckSum(ext2_block_group *group, int32 index)
{
uint16 checksum = 0;
if (HasChecksumFeature()) {
int32 number = B_HOST_TO_LENDIAN_INT32(index);
checksum = calculate_crc(0xffff, fSuperBlock.uuid,
sizeof(fSuperBlock.uuid));
checksum = calculate_crc(checksum, (uint8*)&number, sizeof(number));
checksum = calculate_crc(checksum, (uint8*)group, 30);
if (Has64bitFeature()) {
checksum = calculate_crc(checksum, (uint8*)group + 34,
fGroupDescriptorSize - 34);
}
}
return checksum;
}
void configuration_load(void) {
eeprom_read_block(¤t_configuration, 0, sizeof(configuration_type));
if (calculate_crc(¤t_configuration) != current_configuration.crc) {
memcpy(¤t_configuration, &default_configuration, sizeof(configuration_type));
}
dispatch_configuration_change_event();
}
/*!
* @brief Reads the information block from the chip.
* @return #mxt_rc
*/
int mxt_read_info_block(struct mxt_device *mxt)
{
int ret;
/* Read the ID Information from the chip */
uint8_t *info_blk = (uint8_t *)calloc(1, sizeof(struct mxt_id_info));
if (info_blk == NULL)
{
mxt_err(mxt->ctx, "Memory allocation failure");
return MXT_ERROR_NO_MEM;
}
ret = mxt_read_register(mxt, info_blk, 0, sizeof(struct mxt_id_info));
if (ret)
{
mxt_err(mxt->ctx, "Failed to read ID information");
return ret;
}
/* Determine the number of bytes for checksum calculation */
int num_objects = ((struct mxt_id_info*) info_blk)->num_objects;
size_t crc_area_size = sizeof(struct mxt_id_info)
+ num_objects * sizeof(struct mxt_object);
/* Allocate space to read Information Block AND Checksum from the chip */
size_t info_block_size = crc_area_size + sizeof(struct mxt_raw_crc);
info_blk = (uint8_t *)realloc(info_blk, info_block_size);
if (info_blk == NULL)
{
mxt_err(mxt->ctx, "Memory allocation failure");
return MXT_ERROR_NO_MEM;
}
/* Read the entire Information Block from the chip */
ret = mxt_read_register(mxt, info_blk, 0, info_block_size);
if (ret)
{
mxt_err(mxt->ctx, "Failed to read Information Block");
return ret;
}
/* Update pointers in device structure */
mxt->info.raw_info = info_blk;
mxt->info.id = (struct mxt_id_info*) info_blk;
mxt->info.objects = (struct mxt_object*)(info_blk + sizeof(struct mxt_id_info));
mxt->info.crc = convert_crc((struct mxt_raw_crc*) (info_blk + crc_area_size));
/* Calculate and compare Information Block Checksum */
ret = calculate_crc(mxt, mxt->info.crc, info_blk, crc_area_size);
if (ret)
return ret;
return MXT_SUCCESS;
}
qbyte
wtp_signature (
const char *filename) /* Name of executable program */
{
static char
signature [30];
/* Signature is XXXXXXXX-XXXXXXXX-XXXXXXXX (hash-size-time) */
/* then passed through 32-bit CRC calculation. */
sprintf (signature, "%08lX-%08lX-%08lX",
strhash (filename),
get_file_size (filename),
get_file_time (filename));
return (calculate_crc ((byte *) signature, strlen (signature)));
}
status_t
DirectoryIterator::Lookup(const char* name, size_t nameLength, ino_t* _id)
{
if (strcmp(name, ".") == 0 || strcmp(name, "..") == 0) {
if (strcmp(name, ".") == 0
|| fInode->ID() == BTRFS_OBJECT_ID_CHUNK_TREE) {
*_id = fInode->ID();
return B_OK;
}
return fInode->FindParent(_id);
}
uint32 hash = calculate_crc((uint32)~1, (uint8*)name, nameLength);
struct btrfs_key key;
key.SetType(BTRFS_KEY_TYPE_DIR_ITEM);
key.SetObjectID(fInode->ID());
key.SetOffset(hash);
btrfs_dir_entry *entries;
size_t length;
status_t status = fInode->GetVolume()->FSTree()->FindExact(key,
(void**)&entries, &length);
if (status != B_OK) {
TRACE("DirectoryIterator::Lookup(): Couldn't find entry with hash %lu "
"\"%s\"\n", hash, name);
return status;
}
btrfs_dir_entry *entry = entries;
uint16 current = 0;
while (current < length) {
current += entry->Length();
break;
// TODO there could be several entries with the same name hash
entry = (btrfs_dir_entry *)((uint8*)entry + entry->Length());
}
TRACE("DirectoryIterator::Lookup() entries_length %ld name_length %d\n",
length, entry->NameLength());
*_id = entry->InodeID();
free(entries);
return B_OK;
}
void ModBus_Recive(AS1_TComData dat)
{
byte i;
word crc;
msj[Step]=dat;
switch(Step){
case 0:if (msj[0]!= iId || !Timer_isfinish(&comu_timer)){
Timer_setTime(&comu_timer,3);
break; //Id
}
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
Step++;
Timer_setTime(&comu_timer,3);// ckeckeo que no pasen 3ms
break;
case 7:
Step++;
Timer_Restart(&comu_timer);// ckeckeo que no pasen 3ms
crc = calculate_crc(msj,6);
if ( (crc%256)!=msj[6] || (crc/256)!=msj[7] ){
Step=0;
break;
}
for(i=0;ModbusOnRecive[i].OnFunction!=NULL;i++){
if(ModbusOnRecive[i].func_number==msj[1]){
(*ModbusOnRecive[i].OnFunction)(msj);
break;
}
}
}
}
/*
** ===================================================================
** Method : ModBus_Send
**
** Description :
** llamar a esta función para enviar un mensaje por el puerto
** serie
** ===================================================================
*/
byte ModBus_Send(byte * data,byte cant){
byte i;
word crc;
if(AS1_Tx)
return ERR_BUSY;
for(i=0;i<cant;i++)
msj_out[i]=data[i];
crc = calculate_crc(msj_out,cant);
msj_out[i]= crc%256; // a los siguientes 2 bytes les agrego el crc
msj_out[i+1]= crc/256; // a los siguientes 2 bytes les agrego el crc
cant_msjs_out=cant+2;
AS1_Tx=TRUE;
onSend = ModBus_OnSend;
ModBus_OnSend();//Puede ser demasiado rápido llamar a esta funcion aca, verificar
return ERR_OK;
}
int _tmain(int argc, _TCHAR* argv[])
{
unsigned char p[133] = {
0x01,1,254,0x0f,12,1,1,1,1,1,0,//120
0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,
0,0
} ;
unsigned char pp[128] ={
0x0f,12,1,1,1,1,1,0,//120
0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A,0x1A
};
unsigned int crc = calculate_crc(pp,128);
unsigned char hi =(crc&0xFF00)>>8;
unsigned char lo =crc&0x00FF;
printf("crc = %d,,hi = %d,,lo = %d",crc,hi,lo);
getchar();
return 0;
}
///-----------------------------------------------
// Validates the data for crc and mandatory fields
///-----------------------------------------------
int verify_fru_data(const uint8_t *data, const size_t len)
{
uint8_t checksum = 0;
int rc = -1;
// Validate for first byte to always have a value of [1]
if(data[0] != IPMI_FRU_HDR_BYTE_ZERO)
{
fprintf(stderr, "Invalid entry:[%d] in byte-0\n",data[0]);
return rc;
}
#ifdef __IPMI_DEBUG__
else
{
printf("SUCCESS: Validated [0x%X] in entry_1 of fru_data\n",data[0]);
}
#endif
// See if the calculated CRC matches with the embedded one.
// CRC to be calculated on all except the last one that is CRC itself.
checksum = calculate_crc(data, len - 1);
if(checksum != data[len-1])
{
#ifdef __IPMI_DEBUG__
fprintf(stderr, "Checksum mismatch."
" Calculated:[0x%X], Embedded:[0x%X]\n",
checksum, data[len]);
#endif
return rc;
}
#ifdef __IPMI_DEBUG__
else
{
printf("SUCCESS: Checksum matches:[0x%X]\n",checksum);
}
#endif
return EXIT_SUCCESS;
}
void test_iap(void)
{
unsigned int i,addr;
//unsigned char *pbuf;
store_iap_start();
for(i=0;i<150;i++){
memset(iapbuffer,i,sizeof(iapbuffer));
store_iap(iapbuffer,sizeof(iapbuffer));
delay_us(30000);
}
store_iap_end();
memset(&icount,0,sizeof icount);
if(is_iap_legal()==0){
PrintLog(LOGTYPE_SHORT,"iap unlegal\n");
return;
}
for(i=0;i<icount.records;i++){
//先读record-------------------------------------------------------------
addr = UPDATE_RECORD_ADDR+i*UPDATE_RECORD_SIZE;
if(f_read(addr,&irecord,sizeof(irecord))!=sizeof(irecord)){
PrintLog(LOGTYPE_SHORT,"read iap record error\n");
exit(0);
}
PrintLog(LOGTYPE_SHORT,"read iap record %d ok\n",i);
//读数据区---------------------------------------------------------------
addr = UPDATE_CODE_ADDR+irecord.offset;
flash_read(addr,iapbuffer,irecord.bytes);
if(calculate_crc(iapbuffer,irecord.bytes)!=irecord.codecrc){
PrintLog(LOGTYPE_SHORT,"read code error\n");//代码区校验出错
exit(0);
}
PrintLog(LOGTYPE_SHORT,"read iap code %d ok\n",i);
}
}
uint8_t rf12_rxfinish( char *data ) {
uint16_t crc, crc_chk = 0;
uint8_t crc8, crc_chk8=0;
uint8_t i, size = 12;
if(RF01_status.Rx) return(255); //odbiór jeszcze nie zakoñczony
if(!RF01_status.New) return(254); //jeszcze stare dane w buforze
if( size > RF01_DataLength ) {
data[0] = 0;
RF01_status.New = 0;
return 0; // b³¹d wielkoœci ramki
}
crc_chk8 = calculate_crc(RF01_Data);
crc8=RF01_Data[size];
/*
for(i=0; i<size +1 ; i++)
crc_chk = crcUpdate(crc_chk, RF01_Data[i]);
crc = RF01_Data[i++];
crc |= RF01_Data[i] << 8;
*/
crc = 0;
RF01_status.New = 0;
if(crc8 != crc_chk8) return(0); //b³¹d sumy CRC lub rozmiaru ramki
else {
for(i=0; i<size-1; i++)
data[i] = RF01_Data[i];
data[ size-1 ] = 0; // zakoñczenie ramki zerem
return( size-1 ); // rozmiar odebranej ramki w bajtach
}
}
// Find expanded hash, optimized with caching, return JSON.
// If optimizing, cache hashes and sources.
std::string scan_manager_t::find_expanded_hash_json(
const bool optimizing, const std::string& block_hash) {
// fields to hold the scan
uint64_t k_entropy;
std::string block_label;
uint64_t count;
hashdb::source_offsets_t* source_offsets = new hashdb::source_offsets_t;
// scan
bool matched = scan_manager_t::find_hash(block_hash,
k_entropy, block_label, count, *source_offsets);
// done if no match
if (matched == false) {
delete source_offsets;
return "";
}
// prepare JSON
rapidjson::Document json_doc;
rapidjson::Document::AllocatorType& allocator = json_doc.GetAllocator();
json_doc.SetObject();
// block_hash
std::string hex_block_hash = hashdb::bin_to_hex(block_hash);
json_doc.AddMember("block_hash", v(hex_block_hash, allocator), allocator);
// report hash if not caching or this is the first time for the hash
if (!optimizing || hashes->locked_insert(block_hash)) {
// add entropy
json_doc.AddMember("k_entropy", k_entropy, allocator);
// add block_label
json_doc.AddMember("block_label", v(block_label, allocator), allocator);
// add count
json_doc.AddMember("count", count, allocator);
// add source_list_id
uint32_t crc = calculate_crc(*source_offsets);
json_doc.AddMember("source_list_id", crc, allocator);
// the sources array
rapidjson::Value json_sources(rapidjson::kArrayType);
// add each source object
for (hashdb::source_offsets_t::const_iterator it =
source_offsets->begin();
it != source_offsets->end(); ++it) {
if (!optimizing || sources->locked_insert(it->file_hash)) {
// create a json_source object for the json_sources array
rapidjson::Value json_source(rapidjson::kObjectType);
// provide the complete source information for this source
provide_source_information(*this, it->file_hash, allocator,
json_source);
json_sources.PushBack(json_source, allocator);
}
}
json_doc.AddMember("sources", json_sources, allocator);
// add source_offsets as triplets of file hash, sub_count, offset list
rapidjson::Value json_source_offsets(rapidjson::kArrayType);
for (hashdb::source_offsets_t::const_iterator it =
source_offsets->begin(); it != source_offsets->end(); ++it) {
// file hash
json_source_offsets.PushBack(
v(hashdb::bin_to_hex(it->file_hash), allocator), allocator);
// sub_count
json_source_offsets.PushBack(it->sub_count, allocator);
// file offset array
rapidjson::Value json_file_offsets(rapidjson::kArrayType);
for (std::set<uint64_t>::const_iterator it2 =
it->file_offsets.begin(); it2 != it->file_offsets.end(); ++it2) {
json_file_offsets.PushBack(*it2, allocator);
}
json_source_offsets.PushBack(json_file_offsets, allocator);
}
json_doc.AddMember("source_offsets", json_source_offsets, allocator);
}
delete source_offsets;
// return JSON text
rapidjson::StringBuffer strbuf;
rapidjson::Writer<rapidjson::StringBuffer> writer(strbuf);
json_doc.Accept(writer);
return strbuf.GetString();
}
//-------------------------------------------------------------------------
// Validates the CRC and if found good, calls fru areas parser and calls
// Inventory Dbus with the dictionary of Name:Value for updating.
//-------------------------------------------------------------------------
int ipmi_validate_and_update_inventory(const uint8_t fruid, const uint8_t *fru_data)
{
// Used for generic checksum calculation
uint8_t checksum = 0;
// This can point to any FRU entry.
uint8_t fru_entry;
// A generic offset locator for any FRU record.
uint8_t area_offset = 0;
// First 2 bytes in the record.
uint8_t fru_area_hdr[2] = {0};
// To hold info about individual FRU record areas.
fru_area_t fru_area;
// For parsing and updating Inventory.
fru_area_vec_t fru_area_vec;
int rc = 0;
uint8_t common_hdr[sizeof(struct common_header)] = {0};
memset(common_hdr, 0x0, sizeof(common_hdr));
// Copy first 8 bytes to verify common header
memcpy(common_hdr, fru_data, sizeof(common_hdr));
// Validate for first byte to always have a value of [1]
if(common_hdr[0] != IPMI_FRU_HDR_BYTE_ZERO)
{
fprintf(stderr, "ERROR: Common Header entry_1:[0x%X] Invalid.\n",common_hdr[0]);
return -1;
}
else
{
printf("SUCCESS: Validated [0x%X] in common header\n",common_hdr[0]);
}
// Validate the header checskum that is at last byte ( Offset: 7 )
checksum = calculate_crc(common_hdr, sizeof(common_hdr)-1);
if(checksum != common_hdr[IPMI_FRU_HDR_CRC_OFFSET])
{
#ifdef __IPMI__DEBUG__
fprintf(stderr, "ERROR: Common Header checksum mismatch."
" Calculated:[0x%X], Embedded:[0x%X]\n",
checksum, common_hdr[IPMI_FRU_HDR_CRC_OFFSET]);
#endif
return -1;
}
else
{
printf("SUCCESS: Common Header checksum MATCH:[0x%X]\n",checksum);
}
//-------------------------------------------
// TODO: Add support for Multi Record later
//-------------------------------------------
// Now start walking the common_hdr array that has offsets into other FRU
// record areas and validate those. Starting with second entry since the
// first one is always a [0x01]
for(fru_entry = IPMI_FRU_INTERNAL_OFFSET; fru_entry < (sizeof(struct common_header) -2); fru_entry++)
{
// Offset is 'value given in' internal_offset * 8 from the START of
// common header. So an an example, 01 00 00 00 01 00 00 fe has
// product area set at the offset 01 * 8 --> 8 bytes from the START of
// common header. That means, soon after the header checksum.
area_offset = common_hdr[fru_entry] * IPMI_EIGHT_BYTES;
if(area_offset)
{
memset((void *)&fru_area, 0x0, sizeof(fru_area_t));
// Enumerated FRU area.
fru_area.type = get_fru_area_type(fru_entry);
// From start of fru header + record offset, copy 2 bytes.
fru_area.offset = &((uint8_t *)fru_data)[area_offset];
memcpy(fru_area_hdr, fru_area.offset, sizeof(fru_area_hdr));
// A NON zero value means that the vpd packet has the data for that
// area. err if first element in the record header is _not_ a [0x01].
if(fru_area_hdr[0] != IPMI_FRU_HDR_BYTE_ZERO)
{
fprintf(stderr, "ERROR: Unexpected :[0x%X] found at Record header\n",
fru_area_hdr[0]);
// This vector by now may have had some entries. Since this is a
// failure now, clear the state data.
fru_area_vec.clear();
return -1;
}
else
{
printf("SUCCESS: Validated [0x%X] in fru record:[%d] header\n",
fru_area_hdr[0],fru_entry);
}
// Read Length bytes ( makes a complete record read now )
fru_area.len = fru_area_hdr[1] * IPMI_EIGHT_BYTES;
#ifdef __IPMI_DEBUG__
printf("AREA NO[%d], SIZE = [%d]\n",fru_entry, fru_area.len);
#endif
uint8_t fru_area_data[fru_area.len];
memset(fru_area_data, 0x0, sizeof(fru_area_data));
memmove(fru_area_data, fru_area.offset, sizeof(fru_area_data));
// Calculate checksum (from offset -> (Length-1)).
// All the bytes except the last byte( which is CRC :) ) will
// participate in calculating the checksum.
checksum = calculate_crc(fru_area_data, sizeof(fru_area_data)-1);
// Verify the embedded checksum in last byte with calculated checksum
// record_len -1 since length is some N but numbering is 0..N-1
if(checksum != fru_area_data[fru_area.len-1])
{
#ifdef __IPMI_DEBUG__
fprintf(stderr, "ERROR: FRU Header checksum mismatch. "
" Calculated:[0x%X], Embedded:[0x%X]\n",
checksum, fru_area_data[fru_area.len - 1]);
#endif
// This vector by now may have had some entries. Since this is a
// failure now, clear the state data.
fru_area_vec.clear();
return -1;
}
else
{
printf("SUCCESS: FRU Header checksum MATCH:[0x%X]\n",checksum);
}
// Everything is rihgt about this particular FRU record,
fru_area_vec.push_back(fru_area);
// Update the internal structure with info about this entry that is
// needed while handling each areas.
} // If the packet has data for a particular data record.
} // End walking all the fru records.
// If we reach here, then we have validated the crc for all the records and
// time to call FRU area parser to get a Name:Value pair dictionary.
// This will start iterating all over again on the buffer -BUT- now with the
// job of taking each areas, getting it parsed and then updating the
// DBUS.
if(!(fru_area_vec.empty()))
{
rc = ipmi_update_inventory(fruid, fru_data, fru_area_vec);
}
// We are done with this FRU write packet.
fru_area_vec.clear();
return rc;
}
void configuration_save(void) {
current_configuration.crc = calculate_crc(¤t_configuration);
eeprom_write_block(¤t_configuration, 0, sizeof(configuration_type));
dispatch_configuration_change_event();
}