// 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.
-
// declare it as uint32_t to achieve alignment to 4 Byte boundary
static uint32_t BigBuf[BIGBUF_SIZE/sizeof(uint32_t)];
+/* BigBuf memory layout:
+Pointer to highest available memory: BigBuf_hi
+
+ high BIGBUF_SIZE
+ reserved = BigBuf_malloc() subtracts amount from BigBuf_hi,
+ low 0x00
+*/
+
// High memory mark
static uint16_t BigBuf_hi = BIGBUF_SIZE;
return (uint8_t *)BigBuf;
}
-
// 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);
- }
return emulator_memory;
}
-
// clear ALL of BigBuf
void BigBuf_Clear(void)
{
- memset(BigBuf,0,BIGBUF_SIZE);
- Dbprintf("Buffer cleared (%i bytes)",BIGBUF_SIZE);
+ BigBuf_Clear_ext(true);
}
+// clear ALL of BigBuf
+void BigBuf_Clear_ext(bool verbose)
+{
+ memset(BigBuf, 0, 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
}
}
-
// free ALL allocated chunks. The whole BigBuf is available for traces or samples again.
void BigBuf_free(void)
{
BigBuf_hi = BIGBUF_SIZE;
emulator_memory = NULL;
+
+ // shouldn't this empty BigBuf also?
}
-
// free allocated chunks EXCEPT the emulator memory
void BigBuf_free_keep_EM(void)
{
- if (emulator_memory != NULL) {
+ if (emulator_memory != NULL)
BigBuf_hi = emulator_memory - (uint8_t *)BigBuf;
- } else {
+ else
BigBuf_hi = BIGBUF_SIZE;
- }
+
+ // shouldn't this empty BigBuf also?
}
+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)
}
void clear_trace() {
- uint8_t *trace = BigBuf_get_addr();
- uint16_t max_traceLen = BigBuf_max_traceLen();
- memset(trace, 0x44, max_traceLen);
traceLen = 0;
}
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) {
+ if (traceLen + sizeof(iLen) + sizeof(timestamp_start) + sizeof(duration) + num_paritybytes + iLen >= BigBuf_max_traceLen()) {
tracing = FALSE; // don't trace any more
return FALSE;
}
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;
+ }
+}
projects / proxmark3-svn / blobdiff