| -rw-r--r-- | libopie2/opienet/opcap.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/libopie2/opienet/opcap.cpp b/libopie2/opienet/opcap.cpp index 4d786f5..7463320 100644 --- a/libopie2/opienet/opcap.cpp +++ b/libopie2/opienet/opcap.cpp @@ -703,50 +703,54 @@ bool OWaveLanPacket::toDS() const bool OWaveLanPacket::usesPowerManagement() const { return FC_POWER_MGMT( EXTRACT_LE_16BITS( &_wlanhdr->frame_control ) ); } bool OWaveLanPacket::usesWep() const { return FC_WEP( EXTRACT_LE_16BITS( &_wlanhdr->frame_control ) ); } /*====================================================================================== * OWaveLanManagementPacket *======================================================================================*/ OWaveLanManagementPacket::OWaveLanManagementPacket( const unsigned char* end, const struct ieee_802_11_mgmt_header* data, OWaveLanPacket* parent ) :QObject( parent, "802.11 Management" ), _header( data ), _body( (const struct ieee_802_11_mgmt_body*) (data+1) ) { odebug << "OWaveLanManagementPacket::OWaveLanManagementPacket(): decoding frame..." << oendl; odebug << "Detected subtype is " << managementType() << oendl; - // grab tagged values - const unsigned char* ptr = (const unsigned char*) (_body+1); + // Grab tagged values. + // Beacons contain a 12 byte long fixed parameters set before the tagged parameters come, + // Other management frames don't - which is why we have to inspect the subtype here. + + const unsigned char* ptr = managementType() == "Beacon" ? (const unsigned char*) (_body+1) : (const unsigned char*) (_header+1); + while (ptr < end) { switch ( *ptr ) { case E_SSID: new OWaveLanManagementSSID( end, (struct ssid_t*) ptr, this ); break; case E_FH: new OWaveLanManagementFH( end, (struct fh_t*) ptr, this ); break; case E_DS: new OWaveLanManagementDS( end, (struct ds_t*) ptr, this ); break; case E_RATES: new OWaveLanManagementRates( end, (struct rates_t*) ptr, this ); break; case E_CF: new OWaveLanManagementCF( end, (struct cf_t*) ptr, this ); break; case E_TIM: new OWaveLanManagementTim( end, (struct tim_t*) ptr, this ); break; case E_IBSS: new OWaveLanManagementIBSS( end, (struct ibss_t*) ptr, this ); break; case E_CHALLENGE: new OWaveLanManagementChallenge( end, (struct challenge_t*) ptr, this ); break; } ptr+= ( ( struct ssid_t* ) ptr )->length; // skip length of tagged value ptr+= 2; // skip tag ID and length } } OWaveLanManagementPacket::~OWaveLanManagementPacket() { } |