optional fuzzing support

[enigma2.git] / lib / dvb / demux.cpp

diff --git a/lib/dvb/demux.cpp b/lib/dvb/demux.cpp
index 918ecec6bf6dca4c0a1b9ef33541e7ff97d437eb..11465186c35a447594e70935560e2275d9b3e5cd 100644 (file)
--- a/lib/dvb/demux.cpp
+++ b/lib/dvb/demux.cpp
@@ -5,6 +5,13 @@
 #include <unistd.h>
 #include <signal.h>
 
+// #define FUZZING 1
+
+#if FUZZING
+               /* change every 1:FUZZING_PROPABILITY byte */
+#define FUZZING_PROPABILITY 100
+#endif
+
 #if HAVE_DVB_API_VERSION < 3
 #include <ost/dmx.h>
 
@@ -178,6 +185,14 @@ void eDVBSectionReader::data(int)
        __u8 data[4096]; // max. section size
        int r;
        r = ::read(fd, data, 4096);
+#if FUZZING
+       int j;
+       for (j = 0; j < r; ++j)
+       {
+               if (!(rand()%FUZZING_PROPABILITY))
+                       data[j] ^= rand();
+       }
+#endif 
        if(r < 0)
        {
                eWarning("ERROR reading section - %m\n");
@@ -243,11 +258,13 @@ RESULT eDVBSectionReader::start(const eDVBSectionFilterMask &mask)
 #else
        sct.flags   = DMX_IMMEDIATE_START;
 #endif
+#if !FUZZING
        if (mask.flags & eDVBSectionFilterMask::rfCRC)
        {
                sct.flags |= DMX_CHECK_CRC;
                checkcrc = 1;
        } else
+#endif
                checkcrc = 0;
        
        memcpy(sct.filter.filter, mask.data, DMX_FILTER_SIZE);