| -rw-r--r-- | libopie2/opienet/opcap.h | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/libopie2/opienet/opcap.h b/libopie2/opienet/opcap.h index ad5b07c..9119972 100644 --- a/libopie2/opienet/opcap.h +++ b/libopie2/opienet/opcap.h @@ -1,606 +1,619 @@ /* This file is part of the Opie Project Copyright (C) 2003 by the Wellenreiter team: Martin J. Muench <mjm@remote-exploit.org> Max Moser <mmo@remote-exploit.org Michael 'Mickey' Lauer <mickey@tm.informatik.uni-frankfurt.de> =. .=l. .>+-= _;:, .> :=|. This program is free software; you can .> <`_, > . <= redistribute it and/or modify it under :`=1 )Y*s>-.-- : the terms of the GNU Library General Public .="- .-=="i, .._ License as published by the Free Software - . .-<_> .<> Foundation; either version 2 of the License, ._= =} : or (at your option) any later version. .%`+i> _;_. .i_,=:_. -<s. This program is distributed in the hope that + . -:. = it will be useful, but WITHOUT ANY WARRANTY; : .. .:, . . . without even the implied warranty of =_ + =;=|` MERCHANTABILITY or FITNESS FOR A _.=:. : :=>`: PARTICULAR PURPOSE. See the GNU ..}^=.= = ; Library General Public License for more ++= -. .` .: details. : = ...= . :.=- -. .:....=;==+<; You should have received a copy of the GNU -_. . . )=. = Library General Public License along with -- :-=` this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef OPCAP_H #define OPCAP_H /* LINUX */ extern "C" // work around a bpf/pcap conflict in recent headers { #include <pcap.h> } #include <netinet/ether.h> #include <netinet/ip.h> #include <netinet/udp.h> #include <netinet/tcp.h> #include <time.h> /* QT */ #include <qevent.h> #include <qfile.h> #include <qhostaddress.h> #include <qobject.h> #include <qstring.h> #include <qmap.h> /* OPIE */ #include <opie2/onetutils.h> #include "802_11_user.h" /* TYPEDEFS */ typedef struct timeval timevalstruct; typedef struct pcap_pkthdr packetheaderstruct; /* FORWARDS */ class OPacketCapturer; class QSocketNotifier; /*====================================================================================== * OPacket - A frame on the wire *======================================================================================*/ /** @brief A class representing a data frame on the wire. * * The whole family of the packet classes are used when capturing frames from a network. * Most standard network protocols in use share a common architecture, which mostly is * a packet header and then the packet payload. In layered architectures, each lower layer * encapsulates data from its upper layer - that is it * treats the data from its upper layer as payload and prepends an own header to the packet, * which - again - is treated as the payload for the layer below. The figure below is an * example for how such a data frame is composed out of packets, e.g. when sending a mail. * * <pre> * | User Data | == Mail Data * | SMTP Header | User Data | == SMTP * | TCP Header | SMTP Header | User Data | == TCP * | IP Header | TCP Header | SMTP Header | User Data | == IP * | MAC Header | IP Header | TCP Header | SMTP Header | User Data | == MAC * * </pre> * * The example is trimmed for simplicity, because the MAC (Medium Access Control) layer * also contains a few more levels of encapsulation. * Since the type of the payload is more or less independent from the encapsulating protocol, * the header must be inspected before attempting to decode the payload. Hence, the * encapsulation level varies and can't be deduced without actually looking into the packets. * * For actually working with captured frames, it's useful to identify the packets via names and * insert them into a parent/child - relationship based on the encapsulation. This is why * all packet classes derive from QObject. The amount of overhead caused by the QObject is * not a problem in this case, because we're talking about a theoratical maximum of about * 10 packets per captured frame. We need to stuff them into a searchable list anyway and the * QObject also cares about destroying the sub-, (child-) packets. * * This enables us to perform a simple look for packets of a certain type: * @code * OPacketCapturer* pcap = new OPacketCapturer(); * pcap->open( "eth0" ); * OPacket* p = pcap->next(); * OIPPacket* ip = (OIPPacket*) p->child( "IP" ); // returns 0, if no such child exists * odebug << "got ip packet from " << ip->fromIPAddress().toString() << " to " << ip->toIPAddress().toString() << oendl; * */ class OPacket : public QObject { Q_OBJECT + friend class OPacketCapturer; + public: OPacket( int datalink, packetheaderstruct, const unsigned char*, QObject* parent ); virtual ~OPacket(); timevalstruct timeval() const; int caplen() const; int len() const; QString dump( int = 32 ) const; void updateStats( QMap<QString,int>&, QObjectList* ); private: 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; }; /*====================================================================================== * OPrismHeaderPacket - DLT_PRISM_HEADER frame *======================================================================================*/ class OPrismHeaderPacket : public QObject { Q_OBJECT public: OPrismHeaderPacket( const unsigned char*, const struct prism_hdr*, QObject* parent = 0 ); virtual ~OPrismHeaderPacket(); unsigned int signalStrength() const; private: const struct prism_hdr* _header; }; /*====================================================================================== * 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; }; /*====================================================================================== * OARPPacket *======================================================================================*/ class OARPPacket : public QObject { Q_OBJECT public: OARPPacket( const unsigned char*, const struct myarphdr*, QObject* parent = 0 ); virtual ~OARPPacket(); QHostAddress senderIPV4Address() const; OMacAddress senderMacAddress() const; QHostAddress targetIPV4Address() const; OMacAddress targetMacAddress() const; //int type() const; QString type() const; private: const struct myarphdr* _arphdr; }; /*====================================================================================== * 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 + * Set the packet capturer to use blocking or non-blocking IO. This 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. + * Close the packet capturer. This is automatically done in the destructor. */ void close(); /** + * Close the output capture file. + */ + void closeDumpFile(); + /** * @returns the data link type. * @see <pcap.h> for possible values. */ int dataLink() const; /** + * Dump a packet to the output capture file. + */ + void dump( OPacket* ); + /** * @returns the file descriptor 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, const QString& filename = QString::null ); + bool open( const QString& interface ); /** * Open the packet capturer to capture packets in offline-mode from @a file. */ bool open( const QFile& file ); /** + * Open a prerecorded tcpdump compatible capture file for use with @ref dump() + */ + bool openDumpFile( const QString& filename ); + /** * @returns true if the packet capturer is open */ bool isOpen() const; /** * @returns the snapshot length of this packet capturer */ int snapShot() const; /** * @returns true if the input capture file has a different byte-order * than the byte-order of the running system. */ bool swapped() const; /** * @returns the libpcap version string used to write the input capture file. */ QString version() const; /** * @returns the packet statistic database. * @see QMap */ 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 |