- bool ShowWaitCycles = false;
- char param = param_getchar(Cmd, 0);
-
- if (param == 'h' || (param != 0 && param != 'f')) {
- PrintAndLog("List data in trace buffer.");
- PrintAndLog("Usage: hf 14a list [f]");
- PrintAndLog("f - show frame delay times as well");
- PrintAndLog("sample: hf 14a list f");
- return 0;
- }
-
- if (param == 'f') {
- ShowWaitCycles = true;
- }
-
-// for the time being. Need better Bigbuf handling.
-#define TRACE_SIZE 3000
-
- uint8_t trace[TRACE_SIZE];
- GetFromBigBuf(trace, TRACE_SIZE, 0);
- WaitForResponse(CMD_ACK, NULL);
-
- PrintAndLog("Recorded Activity");
- PrintAndLog("");
- PrintAndLog("Start = Start of Start Bit, End = End of last modulation. Src = Source of Transfer");
- PrintAndLog("All times are in carrier periods (1/13.56Mhz)");
- PrintAndLog("");
- PrintAndLog(" Start | End | Src | Data (! denotes parity error) | CRC ");
- PrintAndLog("-----------|-----------|-----|-----------------------------------------------------------------------");
-
- uint16_t tracepos = 0;
- uint16_t duration;
- uint16_t data_len;
- uint16_t parity_len;
- bool isResponse;
- uint32_t timestamp;
- uint32_t first_timestamp;
- uint32_t EndOfTransmissionTimestamp;
-
- for (;;) {
-
- if(tracepos >= TRACE_SIZE) {
- break;
- }
-
- timestamp = *((uint32_t *)(trace + tracepos));
- if(tracepos == 0) {
- first_timestamp = timestamp;
- }
- tracepos += 4;
- duration = *((uint16_t *)(trace + tracepos));
- tracepos += 2;
- data_len = *((uint16_t *)(trace + tracepos));
- tracepos += 2;
-
- if (data_len & 0x8000) {
- data_len &= 0x7fff;
- isResponse = true;
- } else {
- isResponse = false;
- }
-
- parity_len = (data_len-1)/8 + 1;
-
- if (tracepos + data_len + parity_len >= TRACE_SIZE) {
- break;
- }
-
- uint8_t *frame = trace + tracepos;
- tracepos += data_len;
- uint8_t *parityBytes = trace + tracepos;
- tracepos += parity_len;
-
- // Break and stick with current result if buffer was not completely full
- if (timestamp == 0x44444444) break;
-
- char line[16][110];
- for (int j = 0; j < data_len; j++) {
- int oddparity = 0x01;
- int k;
-
- for (k=0;k<8;k++) {
- oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
- }
-
- uint8_t parityBits = parityBytes[j>>3];
- if (isResponse && (oddparity != ((parityBits >> (7-(j&0x0007))) & 0x01))) {
- sprintf(line[j/16]+((j%16)*4), "%02x! ", frame[j]);
- } else {
- sprintf(line[j/16]+((j%16)*4), "%02x ", frame[j]);
- }
-
- }
-
- char crc[5] = "";
- if (data_len > 2) {
- uint8_t b1, b2;
- ComputeCrc14443(CRC_14443_A, frame, data_len-2, &b1, &b2);
- if (b1 != frame[data_len-2] || b2 != frame[data_len-1]) {
- sprintf(crc, (isResponse & (data_len < 6)) ? "" : "!crc");
- } else {
- sprintf(crc, "");
- }
- }
-
- EndOfTransmissionTimestamp = timestamp + duration;
-
- int num_lines = (data_len - 1)/16 + 1;
- for (int j = 0; j < num_lines; j++) {
- if (j == 0) {
- PrintAndLog(" %9d | %9d | %s | %-64s| %s",
- (timestamp - first_timestamp),
- (EndOfTransmissionTimestamp - first_timestamp),
- (isResponse ? "Tag" : "Rdr"),
- line[j],
- (j == num_lines-1)?crc:"");
- } else {
- PrintAndLog(" | | | %-64s| %s",
- line[j],
- (j == num_lines-1)?crc:"");
- }
- }
-
- bool next_isResponse = *((uint16_t *)(trace + tracepos + 6)) & 0x8000;
-
- if (ShowWaitCycles && !isResponse && next_isResponse) {
- uint32_t next_timestamp = *((uint32_t *)(trace + tracepos));
- if (next_timestamp != 0x44444444) {
- PrintAndLog(" %9d | %9d | %s | fdt (Frame Delay Time): %d",
- (EndOfTransmissionTimestamp - first_timestamp),
- (next_timestamp - first_timestamp),
- " ",
- (next_timestamp - EndOfTransmissionTimestamp));
- }
- }
-
- }
-