Fix possible divide by null

Patch for mickeyl...

1 files changed, 2 insertions, 1 deletions

diff --git a/libopie2/opienet/onetwork.cpp b/libopie2/opienet/onetwork.cpp
index ab3e77f..26a6c81 100644
--- a/libopie2/opienet/onetwork.cpp
+++ b/libopie2/opienet/onetwork.cpp
@@ -993,33 +993,34 @@ int OWirelessNetworkInterface::signalStrength() const
     iw_statistics stat;

     ::memset( &stat, 0, sizeof stat );

     _iwr.u.data.pointer = (char*) &stat;

     _iwr.u.data.flags = 0;

     _iwr.u.data.length = sizeof stat;

 

     if ( !wioctl( SIOCGIWSTATS ) )

     {

         return -1;

     }

 

     int max = _range.max_qual.qual;

     int cur = stat.qual.qual;

     int lev = stat.qual.level; //FIXME: Do something with them?

     int noi = stat.qual.noise; //FIXME: Do something with them?

 

-    return cur*100/max;

+

+    return max != 0 ? cur*100/max: -1;

 }

 

 

 bool OWirelessNetworkInterface::wioctl( int call, struct iwreq& iwreq ) const

 {

     #ifndef NODEBUG

     int result = ::ioctl( _sfd, call, &iwreq );

 

     if ( result == -1 )

         odebug << "ONetworkInterface::wioctl (" << name() << ") call '"

                << debugmapper->map( call ) << "' FAILED! " << result << " (" << strerror( errno ) << ")" << oendl;

     else

         odebug << "ONetworkInterface::wioctl (" << name() << ") call '"

                << debugmapper->map( call ) << "' - Status: Ok." << oendl;

 

     return ( result != -1 );