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hf 14a: if the tag supports it, set default timeout according to ATS

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hf epa: remove explicit but arbitrary timeout settings
Bugfix: don't timeout when frame transmission has already started
This commit is contained in:
pwpiwi 2015-02-11 18:30:36 +01:00
parent 7554370c30
commit 19a700a8b5
4 changed files with 41 additions and 23 deletions
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5
armsrc/epa.c
View file

@ -257,9 +257,6 @@ void EPA_PACE_Collect_Nonce(UsbCommand *c)
return;
}
// increase the timeout (at least some cards really do need this!)
iso14a_set_timeout(0x0002FFFF);
// read the CardAccess file
// this array will hold the CardAccess file
uint8_t card_access[256] = {0};
@ -426,8 +423,6 @@ int EPA_Setup()
// power up the field
iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
iso14a_set_timeout(10500);
// select the card
return_code = iso14443a_select_card(uid, &card_select_info, NULL);
if (return_code != 1) {

32
armsrc/iso14443a.c
View file

@ -141,16 +141,40 @@ const uint8_t OddByteParity[256] = {
1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1
};
void iso14a_set_trigger(bool enable) {
trigger = enable;
}
void iso14a_set_timeout(uint32_t timeout) {
iso14a_timeout = timeout;
if(MF_DBGLEVEL >= 3) Dbprintf("ISO14443A Timeout set to %ld (%dms)", iso14a_timeout, iso14a_timeout / 106);
}
void iso14a_set_ATS_timeout(uint8_t *ats) {
uint8_t tb1;
uint8_t fwi;
uint32_t fwt;
if (ats[0] > 1) { // there is a format byte T0
if ((ats[1] & 0x20) == 0x20) { // there is an interface byte TB(1)
if ((ats[1] & 0x10) == 0x10) { // there is an interface byte TA(1) preceding TB(1)
tb1 = ats[3];
} else {
tb1 = ats[2];
}
fwi = (tb1 & 0xf0) >> 4; // frame waiting indicator (FWI)
fwt = 256 * 16 * (1 << fwi); // frame waiting time (FWT) in 1/fc
iso14a_set_timeout(fwt/(8*16));
}
}
}
//-----------------------------------------------------------------------------
// Generate the parity value for a byte sequence
//
@ -1600,7 +1624,7 @@ static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receive
if(ManchesterDecoding(b, offset, 0)) {
NextTransferTime = MAX(NextTransferTime, Demod.endTime - (DELAY_AIR2ARM_AS_READER + DELAY_ARM2AIR_AS_READER)/16 + FRAME_DELAY_TIME_PICC_TO_PCD);
return TRUE;
} else if (c++ > iso14a_timeout) {
} else if (c++ > iso14a_timeout && Demod.state == DEMOD_UNSYNCD) {
return FALSE;
}
}
@ -1798,6 +1822,10 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
// reset the PCB block number
iso14_pcb_blocknum = 0;
// set default timeout based on ATS
iso14a_set_ATS_timeout(resp);
return 1;
}

1
armsrc/iso14443a.h
View file

@ -85,6 +85,5 @@ extern void iso14443a_setup(uint8_t fpga_minor_mode);
extern int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data);
extern int iso14443a_select_card(uint8_t *uid_ptr, iso14a_card_select_t *resp_data, uint32_t *cuid_ptr);
extern void iso14a_set_trigger(bool enable);
extern void iso14a_set_timeout(uint32_t timeout);
#endif /* __ISO14443A_H */

26
client/cmdhf14a.c
View file

@ -129,11 +129,6 @@ int CmdHF14AList(const char *Cmd)
return 0;
}
void iso14a_set_timeout(uint32_t timeout) {
UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_SET_TIMEOUT, 0, timeout}};
SendCommand(&c);
}
int CmdHF14AReader(const char *Cmd)
{
UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_CONNECT | ISO14A_NO_DISCONNECT, 0, 0}};
@ -346,7 +341,7 @@ int CmdHF14AReader(const char *Cmd)
SendCommand(&c);
WaitForResponse(CMD_ACK,&resp);
uint8_t isOK = resp.arg[0] & 0xff;
PrintAndLog(" Answers to chinese magic backdoor commands: %s", (isOK ? "YES" : "NO") );
PrintAndLog("Answers to chinese magic backdoor commands: %s", (isOK ? "YES" : "NO") );
// disconnect
c.cmd = CMD_READER_ISO_14443a;
@ -510,12 +505,13 @@ int CmdHF14ACmdRaw(const char *cmd) {
uint8_t active=0;
uint8_t active_select=0;
uint16_t numbits=0;
uint16_t timeout=0;
uint32_t timeout=0;
uint8_t bTimeout=0;
char buf[5]="";
int i=0;
uint8_t data[USB_CMD_DATA_SIZE];
unsigned int datalen=0, temp;
uint16_t datalen=0;
uint32_t temp;
if (strlen(cmd)<2) {
PrintAndLog("Usage: hf 14a raw [-r] [-c] [-p] [-f] [-b] [-t] <number of bits> <0A 0B 0C ... hex>");
@ -525,7 +521,7 @@ int CmdHF14ACmdRaw(const char *cmd) {
PrintAndLog(" -a active signal field ON without select");
PrintAndLog(" -s active signal field ON with select");
PrintAndLog(" -b number of bits to send. Useful for send partial byte");
PrintAndLog(" -t timeout");
PrintAndLog(" -t timeout in ms");
return 0;
}
@ -561,7 +557,7 @@ int CmdHF14ACmdRaw(const char *cmd) {
case 't':
bTimeout=1;
sscanf(cmd+i+2,"%d",&temp);
timeout = temp & 0xFFFF;
timeout = temp;
i+=3;
while(cmd[i]!=' ' && cmd[i]!='\0') { i++; }
i+=2;
@ -610,13 +606,13 @@ int CmdHF14ACmdRaw(const char *cmd) {
c.arg[0] |= ISO14A_NO_SELECT;
}
if(bTimeout){
#define MAX_TIMEOUT 624*105 // max timeout is 624 ms
#define MAX_TIMEOUT 40542464 // (2^32-1) * (8*16) / 13560000Hz * 1000ms/s =
c.arg[0] |= ISO14A_SET_TIMEOUT;
c.arg[2] = timeout * 105; // each bit is about 9.4 us
if(c.arg[2]>MAX_TIMEOUT) {
c.arg[2] = MAX_TIMEOUT;
PrintAndLog("Set timeout to 624 ms. The max we can wait for response");
if(timeout > MAX_TIMEOUT) {
timeout = MAX_TIMEOUT;
PrintAndLog("Set timeout to 40542 seconds (11.26 hours). The max we can wait for response");
}
c.arg[2] = 13560000 / 1000 / (8*16) * timeout; // timeout in ETUs (time to transfer 1 bit, approx. 9.4 us)
}
if(power)
c.arg[0] |= ISO14A_NO_DISCONNECT;