X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/146c201cbe67cf3967cb497b3d67fb579c3ccb0e..7d5ebac99397fe7661760259377a4f222fdb92cb:/armsrc/util.c

diff --git a/armsrc/util.c b/armsrc/util.c
index 674f1b91..4948fce8 100644
--- a/armsrc/util.c
+++ b/armsrc/util.c
@@ -12,7 +12,9 @@
 #include "util.h"
 #include "string.h"
 #include "apps.h"
+#include "BigBuf.h"
 
+int tracing = TRUE;
 
 
 void print_result(char *name, uint8_t *buf, size_t len) {
@@ -427,5 +429,91 @@ uint32_t RAMFUNC GetCountSspClk(){
 		return tmp_count;
 	}
 }
+void iso14a_clear_trace() {
+	clear_trace();
+}
+
+void iso14a_set_tracing(bool enable) {
+	set_tracing(enable);
+}
+
+void clear_trace() {
+	uint8_t *trace = BigBuf_get_addr();
+	uint16_t max_traceLen = BigBuf_max_traceLen();
+	memset(trace, 0x44, max_traceLen);
+	traceLen = 0;
+}
+
+void set_tracing(bool enable) {
+	tracing = enable;
+}
+
+/**
+  This is a function to store traces. All protocols can use this generic tracer-function.
+  The traces produced by calling this function can be fetched on the client-side
+  by 'hf list raw', alternatively 'hf list <proto>' for protocol-specific
+  annotation of commands/responses.
+
+**/
+bool RAMFUNC LogTrace(const uint8_t *btBytes, uint16_t iLen, uint32_t timestamp_start, uint32_t timestamp_end, uint8_t *parity, bool readerToTag)
+{
+	if (!tracing) return FALSE;
+
+	uint8_t *trace = BigBuf_get_addr();
+
+	uint16_t num_paritybytes = (iLen-1)/8 + 1;	// number of valid paritybytes in *parity
+	uint16_t duration = timestamp_end - timestamp_start;
 
+	// Return when trace is full
+	uint16_t max_traceLen = BigBuf_max_traceLen();
+
+	if (traceLen + sizeof(iLen) + sizeof(timestamp_start) + sizeof(duration) + num_paritybytes + iLen >= max_traceLen) {
+		tracing = FALSE;	// don't trace any more
+		return FALSE;
+	}
+	// Traceformat:
+	// 32 bits timestamp (little endian)
+	// 16 bits duration (little endian)
+	// 16 bits data length (little endian, Highest Bit used as readerToTag flag)
+	// y Bytes data
+	// x Bytes parity (one byte per 8 bytes data)
+
+	// timestamp (start)
+	trace[traceLen++] = ((timestamp_start >> 0) & 0xff);
+	trace[traceLen++] = ((timestamp_start >> 8) & 0xff);
+	trace[traceLen++] = ((timestamp_start >> 16) & 0xff);
+	trace[traceLen++] = ((timestamp_start >> 24) & 0xff);
+
+	// duration
+	trace[traceLen++] = ((duration >> 0) & 0xff);
+	trace[traceLen++] = ((duration >> 8) & 0xff);
+
+	// data length
+	trace[traceLen++] = ((iLen >> 0) & 0xff);
+	trace[traceLen++] = ((iLen >> 8) & 0xff);
+
+	// readerToTag flag
+	if (!readerToTag) {
+		trace[traceLen - 1] |= 0x80;
+	}
+
+	// data bytes
+	if (btBytes != NULL && iLen != 0) {
+		memcpy(trace + traceLen, btBytes, iLen);
+	}
+	traceLen += iLen;
+
+	// parity bytes
+	if (parity != NULL && iLen != 0) {
+		memcpy(trace + traceLen, parity, num_paritybytes);
+	}
+	traceLen += num_paritybytes;
+
+	if(traceLen +4 < max_traceLen)
+	{	//If it hadn't been cleared, for whatever reason..
+		memset(trace+traceLen,0x44, 4);
+	}
+
+	return TRUE;
+}