| -rw-r--r-- | libopie2/opienet/opcap.h | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/libopie2/opienet/opcap.h b/libopie2/opienet/opcap.h index 9119972..0c9e7da 100644 --- a/libopie2/opienet/opcap.h +++ b/libopie2/opienet/opcap.h @@ -1,122 +1,125 @@ /* 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> + +/* Custom Network Includes */ #include "802_11_user.h" +#include "dhcp.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(); @@ -416,162 +419,185 @@ class OLLCPacket : public QObject * 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; + int length() const; + int checksum() const; private: const struct udphdr* _udphdr; }; /*====================================================================================== + * ODHCPPacket + *======================================================================================*/ + +class ODHCPPacket : public QObject +{ + Q_OBJECT + + public: + ODHCPPacket( const unsigned char*, const struct dhcp_packet*, QObject* parent = 0 ); + virtual ~ODHCPPacket(); + + private: + const struct dhcp_packet* _dhcphdr; +}; + +/*====================================================================================== * 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; + int seq() const; + int ack() const; + int window() const; + int checksum() 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. ... + * library libpcap. + * @see http://tcpdump.org */ class OPacketCapturer : public QObject { Q_OBJECT public: /** * Constructor. */ OPacketCapturer( QObject* parent = 0, const char* name = 0 ); /** * Destructor. */ ~OPacketCapturer(); /** * 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; /** * 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. */ 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 |