X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/117d9ec25c7cbc88555a6a990293ca95a544b915..f71f4deb8f8f1e932c81f3e62e6ab67012e07b33:/client/cmdhf.c

diff --git a/client/cmdhf.c b/client/cmdhf.c
index fbc2d7b2..1dae1d9b 100644
--- a/client/cmdhf.c
+++ b/client/cmdhf.c
@@ -32,8 +32,6 @@ int CmdHFTune(const char *Cmd)
   SendCommand(&c);
   return 0;
 }
-// for the time being. Need better Bigbuf handling.
-#define TRACE_SIZE 3000
 
 //The following data is taken from http://www.proxmark.org/forum/viewtopic.php?pid=13501#p13501
 /*
@@ -384,18 +382,18 @@ uint8_t iclass_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
 	}
 }
 
-uint16_t printTraceLine(uint16_t tracepos, uint8_t* trace, uint8_t protocol, bool showWaitCycles)
+uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, uint8_t protocol, bool showWaitCycles)
 {
 	bool isResponse;
-	uint16_t duration, data_len,parity_len;
+	uint16_t duration, data_len, parity_len;
 
 	uint32_t timestamp, first_timestamp, EndOfTransmissionTimestamp;
 	char explanation[30] = {0};
 
+	if (tracepos + sizeof(uint32_t) + sizeof(uint16_t) + sizeof(uint16_t) > traceLen) return traceLen;
+	
 	first_timestamp = *((uint32_t *)(trace));
 	timestamp = *((uint32_t *)(trace + tracepos));
-	// Break and stick with current result if buffer was not completely full
-	if (timestamp == 0x44444444) return TRACE_SIZE;
 
 	tracepos += 4;
 	duration = *((uint16_t *)(trace + tracepos));
@@ -411,8 +409,8 @@ uint16_t printTraceLine(uint16_t tracepos, uint8_t* trace, uint8_t protocol, boo
 	}
 	parity_len = (data_len-1)/8 + 1;
 
-	if (tracepos + data_len + parity_len >= TRACE_SIZE) {
-		return TRACE_SIZE;
+	if (tracepos + data_len + parity_len > traceLen) {
+		return traceLen;
 	}
 
 	uint8_t *frame = trace + tracepos;
@@ -498,6 +496,8 @@ uint16_t printTraceLine(uint16_t tracepos, uint8_t* trace, uint8_t protocol, boo
 		}
 	}
 
+	if (tracepos + sizeof(uint32_t) + sizeof(uint16_t) + sizeof(uint16_t) > traceLen) return traceLen;
+	
 	bool next_isResponse = *((uint16_t *)(trace + tracepos + 6)) & 0x8000;
 
 	if (showWaitCycles && !isResponse && next_isResponse) {
@@ -510,9 +510,11 @@ uint16_t printTraceLine(uint16_t tracepos, uint8_t* trace, uint8_t protocol, boo
 				(next_timestamp - EndOfTransmissionTimestamp));
 		}
 	}
+
 	return tracepos;
 }
 
+
 int CmdHFList(const char *Cmd)
 {
 	bool showWaitCycles = false;
@@ -570,12 +572,28 @@ int CmdHFList(const char *Cmd)
 	}
 
 
-	uint8_t trace[TRACE_SIZE];
+	uint8_t *trace;
 	uint16_t tracepos = 0;
-	GetFromBigBuf(trace, TRACE_SIZE, 0);
-	WaitForResponse(CMD_ACK, NULL);
-
-	PrintAndLog("Recorded Activity");
+	trace = malloc(USB_CMD_DATA_SIZE);
+
+	// Query for the size of the trace
+	UsbCommand response;
+	GetFromBigBuf(trace, USB_CMD_DATA_SIZE, 0);
+	WaitForResponse(CMD_ACK, &response);
+	uint16_t traceLen = response.arg[2];
+	if (traceLen > USB_CMD_DATA_SIZE) {
+		uint8_t *p = realloc(trace, traceLen);
+		if (p == NULL) {
+			PrintAndLog("Cannot allocate memory for trace");
+			free(trace);
+			return 2;
+		}
+		trace = p;
+		GetFromBigBuf(trace, traceLen, 0);
+		WaitForResponse(CMD_ACK, NULL);
+	}
+	
+	PrintAndLog("Recorded Activity (TraceLen = %d bytes)", traceLen);
 	PrintAndLog("");
 	PrintAndLog("Start = Start of Start Bit, End = End of last modulation. Src = Source of Transfer");
 	PrintAndLog("iso14443a - All times are in carrier periods (1/13.56Mhz)");
@@ -584,10 +602,12 @@ int CmdHFList(const char *Cmd)
 	PrintAndLog("     Start |       End | Src | Data (! denotes parity error)                                   | CRC | Annotation         |");
 	PrintAndLog("-----------|-----------|-----|-----------------------------------------------------------------|-----|--------------------|");
 
-	while(tracepos < TRACE_SIZE)
+	while(tracepos < traceLen)
 	{
-		tracepos = printTraceLine(tracepos, trace, protocol, showWaitCycles);
+		tracepos = printTraceLine(tracepos, traceLen, trace, protocol, showWaitCycles);
 	}
+
+	free(trace);
 	return 0;
 }