Update README.txt

[proxmark3-svn] / armsrc / BigBuf.c

diff --git a/armsrc/BigBuf.c b/armsrc/BigBuf.c
index 18db66f3b2d3e0d90505c95ab40d4c728b65efa6..a5fcea7d288515227fa6af5ca015efef69578459 100644 (file)
--- a/armsrc/BigBuf.c
+++ b/armsrc/BigBuf.c
@@ -13,6 +13,7 @@
 #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.
@@ -50,11 +51,21 @@ 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_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
@@ -88,6 +99,16 @@ void BigBuf_free_keep_EM(void)
        }
 }
 
+void BigBuf_print_status(void)
+{
+       Dbprintf("Memory");
+       Dbprintf("  BIGBUF_SIZE.............%d", BIGBUF_SIZE);
+       Dbprintf("  BigBuf_hi  .............%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)
@@ -96,9 +117,6 @@ uint16_t BigBuf_max_traceLen(void)
 }
 
 void clear_trace() {
-       uint8_t *trace = BigBuf_get_addr();
-       uint16_t max_traceLen = BigBuf_max_traceLen();
-       memset(trace, 0x44, max_traceLen);
        traceLen = 0;
 }
 
@@ -171,41 +189,72 @@ bool RAMFUNC LogTrace(const uint8_t *btBytes, uint16_t iLen, uint32_t timestamp_
        traceLen += iLen;
 
        // parity bytes
-       if (parity != NULL && iLen != 0) {
-               memcpy(trace + traceLen, parity, num_paritybytes);
+       if (num_paritybytes != 0) {
+               if (parity != NULL) {
+                       memcpy(trace + traceLen, parity, num_paritybytes);
+               } else {
+                       memset(trace + traceLen, 0x00, 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;
 }
-int LogTraceHitag(const uint8_t * btBytes, int iBits, int iSamples, uint32_t dwParity, int bReader)
+
+
+int LogTraceHitag(const uint8_t * btBytes, int iBits, int iSamples, uint32_t dwParity, int readerToTag)
 {
-       static uint16_t traceLen = 0;
-       uint8_t *trace = BigBuf_get_addr();
+       /**
+         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) + nbytes(iBits) > BigBuf_max_traceLen()) return FALSE;
+       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
 
-       // Trace the random, i'm curious
        rsamples += iSamples;
        trace[traceLen++] = ((rsamples >> 0) & 0xff);
        trace[traceLen++] = ((rsamples >> 8) & 0xff);
        trace[traceLen++] = ((rsamples >> 16) & 0xff);
        trace[traceLen++] = ((rsamples >> 24) & 0xff);
-       if (!bReader) {
-       trace[traceLen - 1] |= 0x80;
+
+       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, nbytes(iBits));
-       traceLen += nbytes(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;
+       }
+}