/* mid-level functions */
int8_t noinline ow_read_rom(ow_rom_code_t *rom)
{
#if ONEWIRE_BUSCOUNT > 1
uint8_t busmask = 1 << (ONEWIRE_STARTPIN); // FIXME: currently only on 1st bus
#else
uint8_t busmask = ONEWIRE_BUSMASK;
#endif
/* reset the bus */
if (!reset_onewire(busmask))
return -1;
/* transmit command byte */
ow_write_byte(busmask, OW_ROM_READ_ROM);
/* read 64bit rom code */
for (uint8_t i = 0; i < 8; i++) {
/* read byte */
rom->bytewise[i] = ow_read_byte(busmask);
}
/* check CRC (last byte) */
if (rom->crc != crc_checksum(rom->bytewise, 7))
return -2;
return 1;
}
int8_t ow_temp_read_scratchpad(ow_rom_code_t *rom, ow_temp_scratchpad_t *scratchpad)
{
uint8_t busmask;
int8_t ret;
if (rom == NULL)
ret = ow_skip_rom();
else {
/* check for known family code */
if (!ow_temp_sensor(rom))
return -3;
ret = ow_match_rom(rom);
}
if (ret < 0)
return ret;
/* transmit command byte */
ow_write_byte(ONEWIRE_BUSMASK, OW_FUNC_READ_SP);
#if ONEWIRE_BUSCOUNT > 1
for (uint8_t bus = 0; bus < ONEWIRE_BUSCOUNT; bus++) {
/* read 9 bytes from each onewire bus */
busmask = (uint8_t)(1 << (bus + ONEWIRE_STARTPIN));
#else
busmask = ONEWIRE_BUSMASK;
#endif
for (uint8_t i = 0; i < 9; i++) {
scratchpad->bytewise[i] = ow_read_byte(busmask);
}
/* check CRC (last byte) */
if (scratchpad->crc == crc_checksum(&scratchpad->bytewise, 8)) {
/* return if we got a valid response from one device */
return 1;
}
#if ONEWIRE_BUSCOUNT > 1
}
#endif
return -2;
}
/* Checks CRC after applying the mask for the given number of ports.
*
* The bits buffer size must be at least 40 bytes.
*
* Returns 0 if the data is correct, -1 otherwise
*/
uint32_t pbch_crc_check(pbch_t *q, char *bits, uint32_t nof_ports) {
char data[40];
memcpy(data, bits, 40 * sizeof(char));
crc_set_mask(data, nof_ports);
int ret = crc_checksum(&q->crc, data, 40);
if (ret == 0) {
uint32_t chkzeros=0;
for (int i=0;i<24 && !chkzeros;i++) {
chkzeros += data[i];
}
if (chkzeros) {
return 0;
} else {
return -1;
}
} else {
return ret;
}
}
int main(int argc, char **argv) {
int i;
char *data;
unsigned int crc_word, expected_word;
crc_t crc_p;
parse_args(argc, argv);
data = malloc(sizeof(char) * (num_bits + crc_length * 2));
if (!data) {
perror("malloc");
exit(-1);
}
if (!seed) {
seed = time(NULL);
}
srand(seed);
// Generate data
for (i = 0; i < num_bits; i++) {
data[i] = rand() % 2;
}
//Initialize CRC params and tables
if (crc_init(&crc_p, crc_poly, crc_length)) {
exit(-1);
}
// generate CRC word
crc_word = crc_checksum(&crc_p, data, num_bits);
free(data);
// check if generated word is as expected
if (get_expected_word(num_bits, crc_length, crc_poly, seed,
&expected_word)) {
fprintf(stderr, "Test parameters not defined in test_results.h\n");
exit(-1);
}
exit(expected_word != crc_word);
}
int8_t eeprom_save_config(void *mac, void *ip, void *netmask, void *gateway)
/* {{{ */ {
(void) ip;
(void) netmask;
(void) gateway;
/* save new ip addresses */
struct eeprom_config_base_t cfg_base;
/* the eeprom section must contain valid data, if any parameter is NULL */
eeprom_read_block(&cfg_base, EEPROM_CONFIG_BASE,
sizeof(struct eeprom_config_base_t));
if (mac != NULL)
memcpy(&cfg_base.mac, mac, 6);
#if (!UIP_CONF_IPV6 && (!defined(BOOTP_SUPPORT) \
|| defined(BOOTP_TO_EEPROM_SUPPORT))) \
|| defined(OPENVPN_SUPPORT) || defined(IPV6_STATIC_SUPPORT)
if (ip != NULL)
memcpy(&cfg_base.ip, ip, IPADDR_LEN);
#endif
#if !UIP_CONF_IPV6 && (!defined(BOOTP_SUPPORT) \
|| defined(BOOTP_TO_EEPROM_SUPPORT))
if (netmask != NULL)
memcpy(&cfg_base.netmask, netmask, 4);
if (gateway != NULL)
memcpy(&cfg_base.gateway, gateway, 4);
#endif /* not UIP_CONF_IPV6 and (not BOOTP or BOOTP_TO_EEPROM) */
/* calculate new checksum */
uint8_t checksum = crc_checksum(&cfg_base, sizeof(struct eeprom_config_base_t) - 1);
cfg_base.crc = checksum;
/* save config */
eeprom_write_block(EEPROM_CONFIG_BASE, &cfg_base,
sizeof(struct eeprom_config_base_t));
return 0;
} /* }}} */
int8_t eeprom_save_config_ext(struct eeprom_config_ext_t *new_cfg)
/* {{{ */ {
/* save new ip addresses */
struct eeprom_config_ext_t cfg_ext;
/* the eeprom section must contain valid data, if any parameter is NULL */
eeprom_read_block(&cfg_ext, EEPROM_CONFIG_EXT,
sizeof(struct eeprom_config_ext_t));
#if defined(DNS_SUPPORT) && (!defined(BOOTP_SUPPORT) \
|| defined(BOOTP_TO_EEPROM_SUPPORT))
if (new_cfg->dns_server != NULL)
memcpy(&cfg_ext.dns_server, new_cfg->dns_server, IPADDR_LEN);
#endif
#if defined(USART_SUPPORT)
if (new_cfg->usart_baudrate != 0)
cfg_ext.usart_baudrate = new_cfg->usart_baudrate;
#endif
#if defined(HTTPD_AUTH_SUPPORT)
if (new_cfg->httpd_auth_password[0] != 0) {
memcpy(cfg_ext.httpd_auth_password, new_cfg->httpd_auth_password,
sizeof(new_cfg->httpd_auth_password) - 1);
cfg_ext.httpd_auth_password[sizeof(new_cfg->httpd_auth_password) - 1] = 0;
}
#endif
/* calculate new checksum */
uint8_t checksum = crc_checksum(&cfg_ext, sizeof(struct eeprom_config_ext_t) - 1);
cfg_ext.crc = checksum;
/* save config */
eeprom_write_block(EEPROM_CONFIG_EXT, &cfg_ext,
sizeof(struct eeprom_config_ext_t));
return 0;
} /* }}} */
int unpack(int szb_path,szb_header_t *szb_header,image_node *header)
{
unsigned int i;
image_node *prefix=header;
for (i = 0; i <szb_header->imagecount; ++i)
{
if (memcmp(prefix->data->partname,"bootloader",10)==0)
{
printf("start unpack uboot.bin......\n");
crc_checksum(szb_path,prefix,"uboot.img");
unpack_image(szb_path,prefix,"uboot.bin");
prefix=prefix->next;
continue;
}
if (memcmp(prefix->data->partname,"boot",4)==0)
{
printf("start unpack boot.img......\n");
crc_checksum(szb_path,prefix,"boot.img");
unpack_image(szb_path,prefix,"boot.img");
prefix=prefix->next;
continue;
}
if (memcmp(prefix->data->partname,"recovery",8)==0)
{
printf("start unpack recovery.img......\n");
crc_checksum(szb_path,prefix,"recovery.img");
unpack_image(szb_path,prefix,"recovery.img");
prefix=prefix->next;
continue;
}
if (memcmp(prefix->data->partname,"system",6)==0)
{
printf("start unpack system.img\n");
crc_checksum(szb_path,prefix,"system.img");
unpack_image(szb_path,prefix,"system.img");
prefix=prefix->next;
continue;
}
if (memcmp(prefix->data->partname,"cpimage",7)==0)
{
printf("start unpack cpimage.img ......\n");
crc_checksum(szb_path,prefix,"cpimage.img");
unpack_image(szb_path,prefix,"cpimage.img");
prefix=prefix->next;
continue;
}
if (memcmp(prefix->data->partname,"preload",7)==0)
{
printf("start unpack preload.img......\n");
crc_checksum(szb_path,prefix,"preload.img");
unpack_image(szb_path,prefix,"preload.img");
prefix=prefix->next;
continue;
}
if (memcmp(prefix->data->partname,"userdata",8)==0)
{
printf("start analysis userdata.img......\n");
unpack_image(szb_path,prefix,"userdata.img");
prefix=prefix->next;
continue;
}
if (memcmp(prefix->data->partname,"cache",5)==0)
{
printf("start analysis cache.img...... \n");
unpack_image(szb_path,prefix,"cache.img");
prefix=prefix->next;
continue;
}
}
return 0;
}
/* Checks CRC after applying the mask for the given number of ports.
*
* The bits buffer size must be at least 40 bytes.
*
* Returns 0 if the data is correct, -1 otherwise
*/
uint32_t pbch_crc_check(pbch_t *q, char *bits, uint32_t nof_ports) {
char data[40];
memcpy(data, bits, 40 * sizeof(char));
crc_set_mask(data, nof_ports);
return crc_checksum(&q->crc, data, 40);
}