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Merge pull request #186 from uhei/hexdump

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Cmdtrace: Show trace ouput in hexdump format
This commit is contained in:
Philippe Teuwen 2019-05-10 19:27:45 +02:00 • committed by GitHub
commit 80a71c59d4
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1 changed files with 95 additions and 0 deletions
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95
client/cmdtrace.c
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@ -20,6 +20,8 @@ static int usage_trace_list() {
PrintAndLogEx(NORMAL, "Usage: trace list <protocol> [f][c| <0|1>");
PrintAndLogEx(NORMAL, " f - show frame delay times as well");
PrintAndLogEx(NORMAL, " c - mark CRC bytes");
PrintAndLogEx(NORMAL, " x - show hexdump to convert to pcap(ng) or to import into Wireshark using encapsulation type \"ISO 14443\"");
PrintAndLogEx(NORMAL, " syntax to use: `text2pcap -t \"%%S.\" -l 264 -n <input-text-file> <output-pcapng-file>`");
PrintAndLogEx(NORMAL, " <0|1> - use data from Tracebuffer, if not set, try reading data from tag.");
PrintAndLogEx(NORMAL, "Supported <protocol> values:");
PrintAndLogEx(NORMAL, " raw - just show raw data without annotations");
@ -102,6 +104,90 @@ static bool merge_topaz_reader_frames(uint32_t timestamp, uint32_t *duration, ui
return true;
}
static uint16_t printHexLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, uint8_t protocol) {
// sanity check
if (tracepos + sizeof(uint32_t) + sizeof(uint16_t) + sizeof(uint16_t) > traceLen) return traceLen;
bool isResponse;
uint16_t data_len, parity_len;
uint32_t timestamp;
timestamp = *((uint32_t *)(trace + tracepos));
tracepos += 4;
// currently we don't use duration, so we skip it
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 > traceLen) {
return traceLen;
}
uint8_t *frame = trace + tracepos;
tracepos += data_len;
//currently we don't use parity bytes, so we skip it
tracepos += parity_len;
if (data_len == 0) {
PrintAndLogEx(NORMAL, "<empty trace - possible error>");
return tracepos;
}
switch (protocol) {
case ISO_14443A:
{
/* https://www.kaiser.cx/pcap-iso14443.html defines a pseudo header:
* version (currently 0x00), event (Rdr: 0xfe, Tag: 0xff), length (2 bytes)
* to convert to pcap(ng) via text2pcap or to import into Wireshark
* we use format timestamp, newline, offset (0x000000), pseudo header, data
* `text2pcap -t "%S." -l 264 -n <input-text-file> <output-pcapng-file>`
*/
char line[(data_len *3) + 1];
char *ptr = &line[0];
for (int j = 0; j < data_len ; j++) {
ptr += sprintf (ptr, "%02x", frame[j]);
ptr += sprintf (ptr, " ");
}
char data_len_str[5];
char temp_str1[3] = {0};
char temp_str2[3] = {0};
sprintf(data_len_str, "%04x", data_len);
strncat(temp_str1, data_len_str, 2);
temp_str1[2] = '\0';
strncat(temp_str2, data_len_str + 2, 2);
temp_str2[2] = '\0';
PrintAndLogEx(NORMAL, "0.%010u", timestamp);
PrintAndLogEx(NORMAL, "000000 00 %s %s %s %s",
(isResponse ? "ff" : "fe"),
temp_str1,
temp_str2,
line);
return tracepos;
}
default:
PrintAndLogEx(NORMAL, "Currently only 14a supported");
return traceLen;
}
if (is_last_record(tracepos, trace, traceLen)) return traceLen;
return tracepos;
}
static uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, uint8_t protocol, bool showWaitCycles, bool markCRCBytes) {
// sanity check
if (tracepos + sizeof(uint32_t) + sizeof(uint16_t) + sizeof(uint16_t) > traceLen) return traceLen;
@ -592,6 +678,7 @@ int CmdTraceList(const char *Cmd) {
bool showWaitCycles = false;
bool markCRCBytes = false;
bool showHex = false;
bool isOnline = true;
bool errors = false;
uint8_t protocol = 0;
@ -618,6 +705,10 @@ int CmdTraceList(const char *Cmd) {
markCRCBytes = true;
cmdp++;
break;
case 'x':
showHex = true;
cmdp++;
break;
case '0':
isOnline = true;
cmdp++;
@ -695,6 +786,10 @@ int CmdTraceList(const char *Cmd) {
PrintAndLogEx(INFO, "");
if (protocol == FELICA) {
printFelica(traceLen, trace);
} else if (showHex) {
while (tracepos < traceLen) {
tracepos = printHexLine(tracepos, traceLen, trace, protocol);
}
} else {
PrintAndLogEx(NORMAL, "Start = Start of Start Bit, End = End of last modulation. Src = Source of Transfer");
if (protocol == ISO_14443A || protocol == PROTO_MIFARE)