| -rw-r--r-- | libopie2/opienet/opcap.cpp | 33 | ||||
| -rw-r--r-- | libopie2/opienet/opcap.h | 4 |
2 files changed, 27 insertions, 10 deletions
diff --git a/libopie2/opienet/opcap.cpp b/libopie2/opienet/opcap.cpp index 30f6208..04b1bb1 100644 --- a/libopie2/opienet/opcap.cpp +++ b/libopie2/opienet/opcap.cpp @@ -353,599 +353,614 @@ int OWaveLanPacket::duration() const { return _wlanhdr->duration; } OMacAddress OWaveLanPacket::macAddress1() const { return OMacAddress( _wlanhdr->mac1 ); } OMacAddress OWaveLanPacket::macAddress2() const { return OMacAddress( _wlanhdr->mac2 ); } OMacAddress OWaveLanPacket::macAddress3() const { return OMacAddress( _wlanhdr->mac3 ); } OMacAddress OWaveLanPacket::macAddress4() const { return OMacAddress( _wlanhdr->mac4 ); } int OWaveLanPacket::subType() const { return FC_SUBTYPE( EXTRACT_LE_16BITS( &_wlanhdr->frame_control ) ); } int OWaveLanPacket::type() const { return FC_TYPE( EXTRACT_LE_16BITS( &_wlanhdr->frame_control ) ); } int OWaveLanPacket::version() const { return FC_VERSION( EXTRACT_LE_16BITS( &_wlanhdr->frame_control ) ); } bool OWaveLanPacket::fromDS() const { return FC_FROM_DS( EXTRACT_LE_16BITS( &_wlanhdr->frame_control ) ); } bool OWaveLanPacket::toDS() const { return FC_TO_DS( EXTRACT_LE_16BITS( &_wlanhdr->frame_control ) ); } 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) ) { qDebug( "OWaveLanManagementPacket::OWaveLanManagementPacket(): decoding frame..." ); qDebug( "Detected subtype is '%s'", (const char*) managementType() ); // grab tagged values const unsigned char* ptr = (const unsigned char*) (_body+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() { } QString OWaveLanManagementPacket::managementType() const { switch ( FC_SUBTYPE( EXTRACT_LE_16BITS( &_header->fc ) ) ) { case ST_ASSOC_REQUEST: return "AssociationRequest"; break; case ST_ASSOC_RESPONSE: return "AssociationResponse"; break; case ST_REASSOC_REQUEST: return "ReassociationRequest"; break; case ST_REASSOC_RESPONSE: return "ReassociationResponse"; break; case ST_PROBE_REQUEST: return "ProbeRequest"; break; case ST_PROBE_RESPONSE: return "ProbeResponse"; break; case ST_BEACON: return "Beacon"; break; case ST_ATIM: return "Atim"; break; case ST_DISASSOC: return "Disassociation"; break; case ST_AUTH: return "Authentication"; break; case ST_DEAUTH: return "Deathentication"; break; default: qWarning( "OWaveLanManagementPacket::managementType(): unhandled subtype %d", FC_SUBTYPE( EXTRACT_LE_16BITS( &_header->fc ) ) ); return "Unknown"; } } int OWaveLanManagementPacket::beaconInterval() const { return EXTRACT_LE_16BITS( &_body->beacon_interval ); } int OWaveLanManagementPacket::capabilities() const { return EXTRACT_LE_16BITS( &_body->capability_info ); } bool OWaveLanManagementPacket::canESS() const { return CAPABILITY_ESS( EXTRACT_LE_16BITS( &_body->capability_info ) ); } bool OWaveLanManagementPacket::canIBSS() const { return CAPABILITY_IBSS( EXTRACT_LE_16BITS( &_body->capability_info ) ); } bool OWaveLanManagementPacket::canCFP() const { return CAPABILITY_CFP( EXTRACT_LE_16BITS( &_body->capability_info ) ); } bool OWaveLanManagementPacket::canCFP_REQ() const { return CAPABILITY_CFP_REQ( EXTRACT_LE_16BITS( &_body->capability_info ) ); } bool OWaveLanManagementPacket::canPrivacy() const { return CAPABILITY_PRIVACY( EXTRACT_LE_16BITS( &_body->capability_info ) ); } /*====================================================================================== * OWaveLanManagementSSID *======================================================================================*/ OWaveLanManagementSSID::OWaveLanManagementSSID( const unsigned char* end, const struct ssid_t* data, QObject* parent ) :QObject( parent, "802.11 SSID" ), _data( data ) { qDebug( "OWaveLanManagementSSID()" ); } OWaveLanManagementSSID::~OWaveLanManagementSSID() { } QString OWaveLanManagementSSID::ID() const { int length = _data->length; if ( length > 32 ) length = 32; char essid[length+1]; memcpy( &essid, &_data->ssid, length ); essid[length] = 0x0; return essid; } /*====================================================================================== * OWaveLanManagementRates *======================================================================================*/ OWaveLanManagementRates::OWaveLanManagementRates( const unsigned char* end, const struct rates_t* data, QObject* parent ) :QObject( parent, "802.11 Rates" ), _data( data ) { qDebug( "OWaveLanManagementRates()" ); } OWaveLanManagementRates::~OWaveLanManagementRates() { } /*====================================================================================== * OWaveLanManagementCF *======================================================================================*/ OWaveLanManagementCF::OWaveLanManagementCF( const unsigned char* end, const struct cf_t* data, QObject* parent ) :QObject( parent, "802.11 CF" ), _data( data ) { qDebug( "OWaveLanManagementCF()" ); } OWaveLanManagementCF::~OWaveLanManagementCF() { } /*====================================================================================== * OWaveLanManagementFH *======================================================================================*/ OWaveLanManagementFH::OWaveLanManagementFH( const unsigned char* end, const struct fh_t* data, QObject* parent ) :QObject( parent, "802.11 FH" ), _data( data ) { qDebug( "OWaveLanManagementFH()" ); } OWaveLanManagementFH::~OWaveLanManagementFH() { } /*====================================================================================== * OWaveLanManagementDS *======================================================================================*/ OWaveLanManagementDS::OWaveLanManagementDS( const unsigned char* end, const struct ds_t* data, QObject* parent ) :QObject( parent, "802.11 DS" ), _data( data ) { qDebug( "OWaveLanManagementDS()" ); } OWaveLanManagementDS::~OWaveLanManagementDS() { } int OWaveLanManagementDS::channel() const { return _data->channel; } /*====================================================================================== * OWaveLanManagementTim *======================================================================================*/ OWaveLanManagementTim::OWaveLanManagementTim( const unsigned char* end, const struct tim_t* data, QObject* parent ) :QObject( parent, "802.11 Tim" ), _data( data ) { qDebug( "OWaveLanManagementTim()" ); } OWaveLanManagementTim::~OWaveLanManagementTim() { } /*====================================================================================== * OWaveLanManagementIBSS *======================================================================================*/ OWaveLanManagementIBSS::OWaveLanManagementIBSS( const unsigned char* end, const struct ibss_t* data, QObject* parent ) :QObject( parent, "802.11 IBSS" ), _data( data ) { qDebug( "OWaveLanManagementIBSS()" ); } OWaveLanManagementIBSS::~OWaveLanManagementIBSS() { } /*====================================================================================== * OWaveLanManagementChallenge *======================================================================================*/ OWaveLanManagementChallenge::OWaveLanManagementChallenge( const unsigned char* end, const struct challenge_t* data, QObject* parent ) :QObject( parent, "802.11 Challenge" ), _data( data ) { qDebug( "OWaveLanManagementChallenge()" ); } OWaveLanManagementChallenge::~OWaveLanManagementChallenge() { } /*====================================================================================== * OWaveLanDataPacket *======================================================================================*/ OWaveLanDataPacket::OWaveLanDataPacket( const unsigned char* end, const struct ieee_802_11_data_header* data, OWaveLanPacket* parent ) :QObject( parent, "802.11 Data" ), _header( data ) { qDebug( "OWaveLanDataPacket::OWaveLanDataPacket(): decoding frame..." ); const unsigned char* payload = (const unsigned char*) data + sizeof( struct ieee_802_11_data_header ); #warning The next line works for most cases, but can not be correct generally! if (!( ( (OWaveLanPacket*) this->parent())->duration() )) payload -= 6; // compensation for missing last address new OLLCPacket( end, (const struct ieee_802_11_802_2_header*) payload, this ); } OWaveLanDataPacket::~OWaveLanDataPacket() { } /*====================================================================================== * OLLCPacket *======================================================================================*/ OLLCPacket::OLLCPacket( const unsigned char* end, const struct ieee_802_11_802_2_header* data, QObject* parent ) :QObject( parent, "802.11 LLC" ), _header( data ) { qDebug( "OLLCPacket::OLLCPacket(): decoding frame..." ); if ( !(_header->oui[0] || _header->oui[1] || _header->oui[2]) ) { qDebug( "OLLCPacket::OLLCPacket(): contains an encapsulated Ethernet frame (type=%04X)", EXTRACT_16BITS( &_header->type ) ); switch ( EXTRACT_16BITS( &_header->type ) ) // defined in linux/if_ether.h { case ETH_P_IP: new OIPPacket( end, (const struct iphdr*) (data+1), this ); break; default: qDebug( "OLLCPacket::OLLCPacket(): Unknown Encapsulation Type" ); } } } OLLCPacket::~OLLCPacket() { } /*====================================================================================== * OWaveLanControlPacket *======================================================================================*/ OWaveLanControlPacket::OWaveLanControlPacket( const unsigned char* end, const struct ieee_802_11_control_header* data, OWaveLanPacket* parent ) :QObject( parent, "802.11 Data" ), _header( data ) { qDebug( "OWaveLanControlPacket::OWaveLanDataControl(): decoding frame..." ); //TODO: Implement this } OWaveLanControlPacket::~OWaveLanControlPacket() { } /*====================================================================================== * OPacketCapturer *======================================================================================*/ OPacketCapturer::OPacketCapturer( QObject* parent, const char* name ) :QObject( parent, name ), _name( QString::null ), _open( false ), - _pch( 0 ), _sn( 0 ) + _pch( 0 ), _pcd( 0 ), _sn( 0 ) { } OPacketCapturer::~OPacketCapturer() { if ( _open ) { qDebug( "OPacketCapturer::~OPacketCapturer(): pcap still open, autoclosing." ); close(); } } void OPacketCapturer::setBlocking( bool b ) { if ( pcap_setnonblock( _pch, 1-b, _errbuf ) != -1 ) { qDebug( "OPacketCapturer::setBlocking(): blocking mode changed successfully." ); } else { qDebug( "OPacketCapturer::setBlocking(): can't change blocking mode: %s", _errbuf ); } } bool OPacketCapturer::blocking() const { int b = pcap_getnonblock( _pch, _errbuf ); if ( b == -1 ) { qDebug( "OPacketCapturer::blocking(): can't get blocking mode: %s", _errbuf ); return -1; } return !b; } void OPacketCapturer::close() { if ( _open ) { if ( _sn ) { _sn->disconnect( SIGNAL( activated(int) ), this, SLOT( readyToReceive() ) ); delete _sn; } + if ( _pcd ) + { + pcap_dump_close( _pcd ); + _pcd = 0; + } pcap_close( _pch ); _open = false; } qDebug( "OPacketCapturer::close() --- dumping capturing statistics..." ); qDebug( "--------------------------------------------------" ); for( QMap<QString,int>::Iterator it = _stats.begin(); it != _stats.end(); ++it ) qDebug( "%s : %d", (const char*) it.key(), it.data() ); qDebug( "--------------------------------------------------" ); } int OPacketCapturer::dataLink() const { return pcap_datalink( _pch ); } int OPacketCapturer::fileno() const { if ( _open ) { return pcap_fileno( _pch ); } else { return -1; } } OPacket* OPacketCapturer::next() { packetheaderstruct header; qDebug( "==> OPacketCapturer::next()" ); const unsigned char* pdata = pcap_next( _pch, &header ); qDebug( "<== OPacketCapturer::next()" ); + if ( _pcd ) + pcap_dump( (u_char*) _pcd, &header, pdata ); if ( header.len ) { OPacket* p = new OPacket( dataLink(), header, pdata, 0 ); // packets shouldn't be inserted in the QObject child-parent hierarchy, // because due to memory constraints they will be deleted as soon // as possible - that is right after they have been processed // by emit() [ see below ] //TODO: make gathering statistics optional, because it takes time p->updateStats( _stats, const_cast<QObjectList*>( p->children() ) ); return p; } else { return 0; } } -bool OPacketCapturer::open( const QString& name ) +bool OPacketCapturer::open( const QString& name, const QString& filename ) { if ( _open ) { if ( name == _name ) // ignore opening an already openend device { return true; } else // close the last opened device { close(); } } _name = name; + // open libpcap pcap_t* handle = pcap_open_live( const_cast<char*>( (const char*) name ), 1024, 0, 0, &_errbuf[0] ); - if ( handle ) + if ( !handle ) { - qDebug( "OPacketCapturer::open(): libpcap opened successfully." ); + qWarning( "OPacketCapturer::open(): can't open libpcap with '%s': %s", (const char*) name, _errbuf ); + return false; + } + + qDebug( "OPacketCapturer::open(): libpcap [%s] opened successfully.", (const char*) name ); _pch = handle; _open = true; _stats.clear(); // in case we have an application object, create a socket notifier - if ( qApp ) + if ( qApp ) //TODO: I don't like this here... { _sn = new QSocketNotifier( fileno(), QSocketNotifier::Read ); connect( _sn, SIGNAL( activated(int) ), this, SLOT( readyToReceive() ) ); } - return true; - } - else + // if requested, open a dump + pcap_dumper_t* dump = pcap_dump_open( _pch, const_cast<char*>( (const char*) filename ) ); + if ( !dump ) { - qDebug( "OPacketCapturer::open(): can't open libpcap with '%s': %s", (const char*) name, _errbuf ); + qWarning( "OPacketCapturer::open(): can't open dump with '%s': %s", (const char*) filename, _errbuf ); return false; } + qDebug( "OPacketCapturer::open(): dump [%s] opened successfully.", (const char*) filename ); + _pcd = dump; + return true; } bool OPacketCapturer::open( const QFile& file ) { QString name = file.name(); if ( _open ) { close(); if ( name == _name ) // ignore opening an already openend device { return true; } else // close the last opened device { close(); } } _name = name; pcap_t* handle = pcap_open_offline( const_cast<char*>( (const char*) name ), &_errbuf[0] ); if ( handle ) { qDebug( "OPacketCapturer::open(): libpcap opened successfully." ); _pch = handle; _open = true; // in case we have an application object, create a socket notifier if ( qApp ) { _sn = new QSocketNotifier( fileno(), QSocketNotifier::Read ); connect( _sn, SIGNAL( activated(int) ), this, SLOT( readyToReceive() ) ); } return true; } else { qDebug( "OPacketCapturer::open(): can't open libpcap with '%s': %s", (const char*) name, _errbuf ); return false; } } bool OPacketCapturer::isOpen() const { return _open; } void OPacketCapturer::readyToReceive() { qDebug( "OPacketCapturer::readyToReceive(): about to emit 'receivePacket(p)'" ); OPacket* p = next(); emit receivedPacket( p ); // emit is synchronous - packet has been dealt with, now it's safe to delete delete p; } const QMap<QString,int>& OPacketCapturer::statistics() const { return _stats; } diff --git a/libopie2/opienet/opcap.h b/libopie2/opienet/opcap.h index 6c3ac6d..99631ba 100644 --- a/libopie2/opienet/opcap.h +++ b/libopie2/opienet/opcap.h @@ -89,417 +89,419 @@ class OPacket : public QObject const packetheaderstruct _hdr; // pcap packet header const unsigned char* _data; // pcap packet data const unsigned char* _end; // end of pcap packet data }; /*====================================================================================== * OEthernetPacket - DLT_EN10MB frame *======================================================================================*/ class OEthernetPacket : public QObject { Q_OBJECT public: OEthernetPacket( const unsigned char*, const struct ether_header*, QObject* parent = 0 ); virtual ~OEthernetPacket(); OMacAddress sourceAddress() const; OMacAddress destinationAddress() const; int type() const; private: const struct ether_header* _ether; }; /*====================================================================================== * OWaveLanPacket - DLT_IEEE802_11 frame *======================================================================================*/ class OWaveLanPacket : public QObject { Q_OBJECT public: OWaveLanPacket( const unsigned char*, const struct ieee_802_11_header*, QObject* parent = 0 ); virtual ~OWaveLanPacket(); int duration() const; bool fromDS() const; bool toDS() const; virtual OMacAddress macAddress1() const; virtual OMacAddress macAddress2() const; virtual OMacAddress macAddress3() const; virtual OMacAddress macAddress4() const; bool usesPowerManagement() const; int type() const; int subType() const; int version() const; bool usesWep() const; private: const struct ieee_802_11_header* _wlanhdr; }; /*====================================================================================== * OWaveLanManagementPacket - type: management (T_MGMT) *======================================================================================*/ class OWaveLanManagementPacket : public QObject { Q_OBJECT public: OWaveLanManagementPacket( const unsigned char*, const struct ieee_802_11_mgmt_header*, OWaveLanPacket* parent = 0 ); virtual ~OWaveLanManagementPacket(); QString managementType() const; int beaconInterval() const; int capabilities() const; // generic bool canESS() const; bool canIBSS() const; bool canCFP() const; bool canCFP_REQ() const; bool canPrivacy() const; private: const struct ieee_802_11_mgmt_header* _header; const struct ieee_802_11_mgmt_body* _body; }; /*====================================================================================== * OWaveLanManagementSSID *======================================================================================*/ class OWaveLanManagementSSID : public QObject { Q_OBJECT public: OWaveLanManagementSSID( const unsigned char*, const struct ssid_t*, QObject* parent = 0 ); virtual ~OWaveLanManagementSSID(); QString ID() const; private: const struct ssid_t* _data; }; /*====================================================================================== * OWaveLanManagementRates *======================================================================================*/ class OWaveLanManagementRates : public QObject { Q_OBJECT public: OWaveLanManagementRates( const unsigned char*, const struct rates_t*, QObject* parent = 0 ); virtual ~OWaveLanManagementRates(); private: const struct rates_t* _data; }; /*====================================================================================== * OWaveLanManagementCF *======================================================================================*/ class OWaveLanManagementCF : public QObject { Q_OBJECT public: OWaveLanManagementCF( const unsigned char*, const struct cf_t*, QObject* parent = 0 ); virtual ~OWaveLanManagementCF(); private: const struct cf_t* _data; }; /*====================================================================================== * OWaveLanManagementFH *======================================================================================*/ class OWaveLanManagementFH : public QObject { Q_OBJECT public: OWaveLanManagementFH( const unsigned char*, const struct fh_t*, QObject* parent = 0 ); virtual ~OWaveLanManagementFH(); private: const struct fh_t* _data; }; /*====================================================================================== * OWaveLanManagementDS *======================================================================================*/ class OWaveLanManagementDS : public QObject { Q_OBJECT public: OWaveLanManagementDS( const unsigned char*, const struct ds_t*, QObject* parent = 0 ); virtual ~OWaveLanManagementDS(); int channel() const; private: const struct ds_t* _data; }; /*====================================================================================== * OWaveLanManagementTim *======================================================================================*/ class OWaveLanManagementTim : public QObject { Q_OBJECT public: OWaveLanManagementTim( const unsigned char*, const struct tim_t*, QObject* parent = 0 ); virtual ~OWaveLanManagementTim(); private: const struct tim_t* _data; }; /*====================================================================================== * OWaveLanManagementIBSS *======================================================================================*/ class OWaveLanManagementIBSS : public QObject { Q_OBJECT public: OWaveLanManagementIBSS( const unsigned char*, const struct ibss_t*, QObject* parent = 0 ); virtual ~OWaveLanManagementIBSS(); private: const struct ibss_t* _data; }; /*====================================================================================== * OWaveLanManagementChallenge *======================================================================================*/ class OWaveLanManagementChallenge : public QObject { Q_OBJECT public: OWaveLanManagementChallenge( const unsigned char*, const struct challenge_t*, QObject* parent = 0 ); virtual ~OWaveLanManagementChallenge(); private: const struct challenge_t* _data; }; /*====================================================================================== * OWaveLanDataPacket - type: data (T_DATA) *======================================================================================*/ class OWaveLanDataPacket : public QObject { Q_OBJECT public: OWaveLanDataPacket( const unsigned char*, const struct ieee_802_11_data_header*, OWaveLanPacket* parent = 0 ); virtual ~OWaveLanDataPacket(); private: const struct ieee_802_11_data_header* _header; }; /*====================================================================================== * OWaveLanControlPacket - type: control (T_CTRL) *======================================================================================*/ class OWaveLanControlPacket : public QObject { Q_OBJECT public: OWaveLanControlPacket( const unsigned char*, const struct ieee_802_11_control_header*, OWaveLanPacket* parent = 0 ); virtual ~OWaveLanControlPacket(); private: const struct ieee_802_11_control_header* _header; }; /*====================================================================================== * OLLCPacket - IEEE 802.2 Link Level Control *======================================================================================*/ class OLLCPacket : public QObject { Q_OBJECT public: OLLCPacket( const unsigned char*, const struct ieee_802_11_802_2_header* data, QObject* parent = 0 ); virtual ~OLLCPacket(); private: const struct ieee_802_11_802_2_header* _header; }; /*====================================================================================== * OIPPacket *======================================================================================*/ class OIPPacket : public QObject { Q_OBJECT public: OIPPacket( const unsigned char*, const struct iphdr*, QObject* parent = 0 ); virtual ~OIPPacket(); QHostAddress fromIPAddress() const; QHostAddress toIPAddress() const; int tos() const; int len() const; int id() const; int offset() const; int ttl() const; int protocol() const; int checksum() const; private: const struct iphdr* _iphdr; }; /*====================================================================================== * OUDPPacket *======================================================================================*/ class OUDPPacket : public QObject { Q_OBJECT public: OUDPPacket( const unsigned char*, const struct udphdr*, QObject* parent = 0 ); virtual ~OUDPPacket(); int fromPort() const; int toPort() const; private: const struct udphdr* _udphdr; }; /*====================================================================================== * OTCPPacket *======================================================================================*/ class OTCPPacket : public QObject { Q_OBJECT public: OTCPPacket( const unsigned char*, const struct tcphdr*, QObject* parent = 0 ); virtual ~OTCPPacket(); int fromPort() const; int toPort() const; private: const struct tcphdr* _tcphdr; }; /*====================================================================================== * OPacketCapturer *======================================================================================*/ /** * @brief A class based wrapper for network packet capturing. * * This class is the base of a high-level interface to the well known packet capturing * library libpcap. ... */ class OPacketCapturer : public QObject { Q_OBJECT public: /** * Constructor. */ OPacketCapturer( QObject* parent = 0, const char* name = 0 ); /** * Destructor. */ ~OPacketCapturer(); /** * Setting the packet capturer to use blocking IO calls can be useful when * not using the socket notifier, e.g. without an application object. */ void setBlocking( bool ); /** * @returns true if the packet capturer uses blocking IO calls. */ bool blocking() const; /** * Closes the packet capturer. This is automatically done in the destructor. */ void close(); /** * @returns the data link type. * @see <pcap.h> for possible values. */ int dataLink() const; /** * @returns the filedescriptor of the packet capturer. This is only useful, if * not using the socket notifier, e.g. without an application object. */ int fileno() const; /** * @returns the next @ref OPacket from the packet capturer. * @note If blocking mode is true then this call might block. */ OPacket* next(); /** * Open the packet capturer to capture packets in live-mode from @a interface. + * If a @a filename is given, all captured packets are output to a tcpdump-compatible capture file. */ - bool open( const QString& interface ); + bool open( const QString& interface, const QString& filename = QString::null ); /** * Open the packet capturer to capture packets in offline-mode from @a file. */ bool open( const QFile& file ); /** * @returns true if the packet capturer is open */ bool isOpen() const; const QMap<QString,int>& statistics() const; signals: /** * This signal is emitted, when a packet has been received. */ void receivedPacket( OPacket* ); protected slots: void readyToReceive(); protected: QString _name; // devicename bool _open; // check this before doing pcap calls pcap_t* _pch; // pcap library handle + pcap_dumper_t* _pcd; // pcap dumper handle QSocketNotifier* _sn; // socket notifier for main loop mutable char _errbuf[PCAP_ERRBUF_SIZE]; // holds error strings from libpcap QMap<QString, int> _stats; // statistics; }; #endif // OPCAP_H |