X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/0644d5e3a3ed255fea1084c0af564c00f592b36c..5594c6215e9df0d8e9b77acc389be7ccdadd23e0:/armsrc/BigBuf.c

diff --git a/armsrc/BigBuf.c b/armsrc/BigBuf.c
index 7f56e9a0..4fe97b46 100644
--- a/armsrc/BigBuf.c
+++ b/armsrc/BigBuf.c
@@ -13,10 +13,19 @@
 #include "proxmark3.h"
 #include "apps.h"
 #include "string.h"
+#include "util.h"
 
 // BigBuf is the large multi-purpose buffer, typically used to hold A/D samples or traces.
 // Also used to hold various smaller buffers and the Mifare Emulator Memory.
 
+/* BigBuf memory layout:
+Pointer to highest available memory: BigBuf_hi
+
+    high BIGBUF_SIZE
+    reserved = BigBuf_malloc()  subtracts amount from BigBuf_hi,   
+	low  0x00
+*/
+
 // declare it as uint32_t to achieve alignment to 4 Byte boundary
 static uint32_t BigBuf[BIGBUF_SIZE/sizeof(uint32_t)];
 
@@ -26,10 +35,9 @@ static uint16_t BigBuf_hi = BIGBUF_SIZE;
 // pointer to the emulator memory.
 static uint8_t *emulator_memory = NULL;
 
-// trace related global variables
-// (only one left). ToDo: make this static as well?
-uint16_t traceLen = 0;
-
+// trace related variables
+static uint16_t traceLen = 0;
+int tracing = 1; //Last global one.. todo static?
 
 // get the address of BigBuf
 uint8_t *BigBuf_get_addr(void)
@@ -41,7 +49,8 @@ uint8_t *BigBuf_get_addr(void)
 // get the address of the emulator memory. Allocate part of Bigbuf for it, if not yet done
 uint8_t *BigBuf_get_EM_addr(void)
 {
-	if (emulator_memory == NULL) {		// not yet allocated
+	// not yet allocated
+	if (emulator_memory == NULL) {
 		emulator_memory = BigBuf_malloc(CARD_MEMORY_SIZE);
 	}
 	
@@ -51,11 +60,24 @@ uint8_t *BigBuf_get_EM_addr(void)
 
 // clear ALL of BigBuf
 void BigBuf_Clear(void)
+{
+	BigBuf_Clear_ext(true);
+}
+// clear ALL of BigBuf
+void BigBuf_Clear_ext(bool verbose)
 {
 	memset(BigBuf,0,BIGBUF_SIZE);
-	Dbprintf("Buffer cleared (%i bytes)",BIGBUF_SIZE);
+	if (verbose) 
+		Dbprintf("Buffer cleared (%i bytes)",BIGBUF_SIZE);
+}
+void BigBuf_Clear_EM(void){
+	memset(BigBuf_get_EM_addr(), 0, CARD_MEMORY_SIZE);
 }
 
+void BigBuf_Clear_keep_EM(void)
+{
+	memset(BigBuf,0,BigBuf_hi);
+}
 
 // allocate a chunk of memory from BigBuf. We allocate high memory first. The unallocated memory
 // at the beginning of BigBuf is always for traces/samples
@@ -89,9 +111,164 @@ void BigBuf_free_keep_EM(void)
 	}
 }
 
+void BigBuf_print_status(void)
+{
+	Dbprintf("Memory");
+	Dbprintf("  BIGBUF_SIZE.............%d", BIGBUF_SIZE);
+	Dbprintf("  Available memory........%d", BigBuf_hi);
+	Dbprintf("Tracing");
+	Dbprintf("  tracing ................%d", tracing);
+	Dbprintf("  traceLen ...............%d", traceLen);
+}
+
 
 // return the maximum trace length (i.e. the unallocated size of BigBuf)
 uint16_t BigBuf_max_traceLen(void)
 {
 	return BigBuf_hi;
 }
+
+void clear_trace() {
+	traceLen = 0;
+}
+
+void set_tracing(bool enable) {
+	tracing = enable;
+}
+
+bool get_tracing(void) {
+	return tracing;
+}
+
+/**
+ * Get the number of bytes traced
+ * @return
+ */
+uint16_t BigBuf_get_traceLen(void)
+{
+	return traceLen;
+}
+
+/**
+  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 (num_paritybytes != 0) {
+		if (parity != NULL) {
+			memcpy(trace + traceLen, parity, num_paritybytes);
+		} else {
+			memset(trace + traceLen, 0x00, num_paritybytes);
+		}
+	}
+	traceLen += num_paritybytes;
+
+	return true;
+}
+
+
+int LogTraceHitag(const uint8_t * btBytes, int iBits, int iSamples, uint32_t dwParity, int readerToTag)
+{
+	/**
+	  Todo, rewrite the logger to use the generic functionality instead. It should be noted, however,
+	  that this logger takes number of bits as argument, not number of bytes.
+	  **/
+
+	if (!tracing) return false;
+
+	uint8_t *trace = BigBuf_get_addr();
+	uint16_t iLen = nbytes(iBits);
+	// Return when trace is full
+	if (traceLen + sizeof(rsamples) + sizeof(dwParity) + sizeof(iBits) + iLen > BigBuf_max_traceLen()) return false;
+
+	//Hitag traces appear to use this traceformat:
+	// 32 bits timestamp (little endian,Highest Bit used as readerToTag flag)
+	// 32 bits parity
+	// 8 bits size (number of bits in the trace entry, not number of bytes)
+	// y Bytes data
+
+	rsamples += iSamples;
+	trace[traceLen++] = ((rsamples >> 0) & 0xff);
+	trace[traceLen++] = ((rsamples >> 8) & 0xff);
+	trace[traceLen++] = ((rsamples >> 16) & 0xff);
+	trace[traceLen++] = ((rsamples >> 24) & 0xff);
+
+	if (!readerToTag) {
+		trace[traceLen - 1] |= 0x80;
+	}
+
+	trace[traceLen++] = ((dwParity >> 0) & 0xff);
+	trace[traceLen++] = ((dwParity >> 8) & 0xff);
+	trace[traceLen++] = ((dwParity >> 16) & 0xff);
+	trace[traceLen++] = ((dwParity >> 24) & 0xff);
+	trace[traceLen++] = iBits;
+
+	memcpy(trace + traceLen, btBytes, iLen);
+	traceLen += iLen;
+
+	return true;
+}
+
+
+// Emulator memory
+uint8_t emlSet(uint8_t *data, uint32_t offset, uint32_t length){
+	uint8_t* mem = BigBuf_get_EM_addr();
+	if (offset+length < CARD_MEMORY_SIZE) {
+		memcpy(mem+offset, data, length);
+		return 0;
+	} else {
+		Dbprintf("Error, trying to set memory outside of bounds! %d  > %d", (offset+length), CARD_MEMORY_SIZE);
+		return 1;
+	}
+}