add check for no wave in graphbuffer prior to...

[proxmark3-svn] / client / cmdlf.c

diff --git a/client/cmdlf.c b/client/cmdlf.c
index 016f0fe288ba5ca051916d5a775fb009594178d2..59f6cd0d4a336ba12e89bdc3406e85a941807e64 100644 (file)
--- a/client/cmdlf.c
+++ b/client/cmdlf.c
@@ -38,7 +38,7 @@ static int CmdHelp(const char *Cmd);
 
 
 
-int usage_lf_cmdread()
+int usage_lf_cmdread(void)
 {
        PrintAndLog("Usage: lf cmdread d <delay period> z <zero period> o <one period> c <cmdbytes> [H] ");
        PrintAndLog("Options:        ");
@@ -430,7 +430,7 @@ int CmdIndalaClone(const char *Cmd)
        return 0;
 }
 
-int usage_lf_read()
+int usage_lf_read(void)
 {
        PrintAndLog("Usage: lf read");
        PrintAndLog("Options:        ");
@@ -440,7 +440,7 @@ int usage_lf_read()
        PrintAndLog("Use 'lf config' to set parameters.");
        return 0;
 }
-int usage_lf_snoop()
+int usage_lf_snoop(void)
 {
        PrintAndLog("Usage: lf snoop");
        PrintAndLog("Options:        ");
@@ -450,7 +450,7 @@ int usage_lf_snoop()
        return 0;
 }
 
-int usage_lf_config()
+int usage_lf_config(void)
 {
        PrintAndLog("Usage: lf config [H|<divisor>] [b <bps>] [d <decim>] [a 0|1]");
        PrintAndLog("Options:        ");
@@ -685,7 +685,7 @@ int usage_lf_simpsk(void)
        return 0;
 }
 
-// by marshmellow - sim ask data given clock, fcHigh, fcLow, invert 
+// by marshmellow - sim fsk data given clock, fcHigh, fcLow, invert 
 // - allow pull data from DemodBuffer
 int CmdLFfskSim(const char *Cmd)
 {
@@ -1180,6 +1180,17 @@ int CmdLFfind(const char *Cmd)
                return 1;
        }
 
+       size_t testLen = (GraphTraceLen < 500) ? GraphTraceLen : 500;
+       // only run if graphbuffer is just noise as it should be for hitag
+       if (graphJustNoise(GraphBuffer, testLen)) { 
+               if (!offline && (cmdp != '1')){
+                       ans=CmdLFHitagReader("26");
+                       if (ans==0) {
+                               return 1;
+                       }
+               }
+       }
+
        PrintAndLog("\nNo Known Tags Found!\n");
        if (testRaw=='u' || testRaw=='U'){
                //test unknown tag formats (raw mode)