X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/ecbf82fe20a39cfdd323e40caa30c6699f511939..cf4640b973d72d184d5a782cb63379e02c53c5bc:/client/cmdlfio.c

diff --git a/client/cmdlfio.c b/client/cmdlfio.c
index e3769511..626fe639 100644
--- a/client/cmdlfio.c
+++ b/client/cmdlfio.c
@@ -11,10 +11,12 @@
 #include "cmdmain.h"
 #include "cmddata.h"
 #include "cmdlf.h"
+#include "lfdemod.h"  //for IOdemodFSK + bytebits_to_byte
+#include "util.h"     //for sprint_bin_break
 
 static int CmdHelp(const char *Cmd);
 
-int CmdIODemodFSK(const char *Cmd)
+int CmdIOReadFSK(const char *Cmd)
 {
   int findone=0;
   if(Cmd[0]=='1') findone=1;
@@ -24,20 +26,95 @@ int CmdIODemodFSK(const char *Cmd)
   SendCommand(&c);
   return 0;
 }
-/*
-int CmdIOProxDemod(const char *Cmd){
-  if (GraphTraceLen < 4800) {
-    PrintAndLog("too short; need at least 4800 samples");
+
+//by marshmellow
+//IO-Prox demod - FSK RF/64 with preamble of 000000001
+//print ioprox ID and some format details
+int CmdFSKdemodIO(const char *Cmd)
+{
+  int idx=0;
+  //something in graphbuffer?
+  if (GraphTraceLen < 65) {
+    if (g_debugMode)PrintAndLog("DEBUG: not enough samples in GraphBuffer");
     return 0;
   }
-  GraphTraceLen = 4800;
-  for (int i = 0; i < GraphTraceLen; ++i) {
-    GraphBuffer[i] = (GraphBuffer[i] < 0) ? 0 : 1;
+  uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+  size_t BitLen = getFromGraphBuf(BitStream);
+  if (BitLen==0) return 0;
+
+  //get binary from fsk wave
+  idx = IOdemodFSK(BitStream,BitLen);
+  if (idx<0){
+    if (g_debugMode){
+      if (idx==-1){
+        PrintAndLog("DEBUG: Just Noise Detected");     
+      } else if (idx == -2) {
+        PrintAndLog("DEBUG: not enough samples");
+      } else if (idx == -3) {
+        PrintAndLog("DEBUG: error during fskdemod");        
+      } else if (idx == -4) {
+        PrintAndLog("DEBUG: Preamble not found");
+      } else if (idx == -5) {
+        PrintAndLog("DEBUG: Separator bits not found");
+      } else {
+        PrintAndLog("DEBUG: Error demoding fsk %d", idx);
+      }
+    }
+    return 0;
   }
-  RepaintGraphWindow();
-  return 0;
-}  
-*/
+  if (idx==0){
+    if (g_debugMode){
+      PrintAndLog("DEBUG: IO Prox Data not found - FSK Bits: %d",BitLen);
+      if (BitLen > 92) PrintAndLog("%s", sprint_bin_break(BitStream,92,16));
+    } 
+    return 0;
+  }
+    //Index map
+    //0           10          20          30          40          50          60
+    //|           |           |           |           |           |           |
+    //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
+    //-----------------------------------------------------------------------------
+    //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
+    //
+    //XSF(version)facility:codeone+codetwo (raw)
+    //Handle the data
+  if (idx+64>BitLen) {
+    if (g_debugMode) PrintAndLog("not enough bits found - bitlen: %d",BitLen);
+    return 0;
+  }
+  PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx],    BitStream[idx+1],  BitStream[idx+2], BitStream[idx+3], BitStream[idx+4], BitStream[idx+5], BitStream[idx+6], BitStream[idx+7], BitStream[idx+8]);
+  PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx+9],  BitStream[idx+10], BitStream[idx+11],BitStream[idx+12],BitStream[idx+13],BitStream[idx+14],BitStream[idx+15],BitStream[idx+16],BitStream[idx+17]);
+  PrintAndLog("%d%d%d%d%d%d%d%d %d facility",BitStream[idx+18], BitStream[idx+19], BitStream[idx+20],BitStream[idx+21],BitStream[idx+22],BitStream[idx+23],BitStream[idx+24],BitStream[idx+25],BitStream[idx+26]);
+  PrintAndLog("%d%d%d%d%d%d%d%d %d version",BitStream[idx+27], BitStream[idx+28], BitStream[idx+29],BitStream[idx+30],BitStream[idx+31],BitStream[idx+32],BitStream[idx+33],BitStream[idx+34],BitStream[idx+35]);
+  PrintAndLog("%d%d%d%d%d%d%d%d %d code1",BitStream[idx+36], BitStream[idx+37], BitStream[idx+38],BitStream[idx+39],BitStream[idx+40],BitStream[idx+41],BitStream[idx+42],BitStream[idx+43],BitStream[idx+44]);
+  PrintAndLog("%d%d%d%d%d%d%d%d %d code2",BitStream[idx+45], BitStream[idx+46], BitStream[idx+47],BitStream[idx+48],BitStream[idx+49],BitStream[idx+50],BitStream[idx+51],BitStream[idx+52],BitStream[idx+53]);
+  PrintAndLog("%d%d%d%d%d%d%d%d %d%d checksum",BitStream[idx+54],BitStream[idx+55],BitStream[idx+56],BitStream[idx+57],BitStream[idx+58],BitStream[idx+59],BitStream[idx+60],BitStream[idx+61],BitStream[idx+62],BitStream[idx+63]);
+
+  uint32_t code = bytebits_to_byte(BitStream+idx,32);
+  uint32_t code2 = bytebits_to_byte(BitStream+idx+32,32);
+  uint8_t version = bytebits_to_byte(BitStream+idx+27,8); //14,4
+  uint8_t facilitycode = bytebits_to_byte(BitStream+idx+18,8) ;
+  uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
+  uint8_t crc = bytebits_to_byte(BitStream+idx+54,8);
+  uint16_t calccrc = 0;
+
+  for (uint8_t i=1; i<6; ++i){
+    calccrc += bytebits_to_byte(BitStream+idx+9*i,8);
+  }
+  calccrc &= 0xff;
+  calccrc = 0xff - calccrc;
+
+  char *crcStr = (crc == calccrc) ? "crc ok": "!crc";
+
+  PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x) [%02x %s]",version,facilitycode,number,code,code2, crc, crcStr);
+  setDemodBuf(BitStream,64,idx);
+  if (g_debugMode){
+    PrintAndLog("DEBUG: idx: %d, Len: %d, Printing demod buffer:",idx,64);
+    printDemodBuff();
+  }
+  return 1;
+}
+
 int CmdIOClone(const char *Cmd)
 {
   unsigned int hi = 0, lo = 0;
@@ -67,8 +144,8 @@ int CmdIOClone(const char *Cmd)
 static command_t CommandTable[] = 
 {
   {"help",        CmdHelp,            1, "This help"},
-  //{"demod",       CmdIOProxDemod,     1, "Demodulate Stream"},
-  {"fskdemod",    CmdIODemodFSK,      0, "['1'] Realtime IO FSK demodulator (option '1' for one tag only)"},
+  {"demod",       CmdFSKdemodIO,      1, "Demodulate IO Prox tag from the GraphBuffer"},
+  {"read",        CmdIOReadFSK,       0, "['1'] Realtime IO FSK demodulate from antenna (option '1' for one tag only)"},
   {"clone",       CmdIOClone,         0, "Clone ioProx Tag"},
   {NULL, NULL, 0, NULL}
 };