| -rw-r--r-- | libopie2/opienet/opcap.cpp | 19 | ||||
| -rw-r--r-- | libopie2/opienet/opcap.h | 35 |
2 files changed, 31 insertions, 23 deletions
diff --git a/libopie2/opienet/opcap.cpp b/libopie2/opienet/opcap.cpp index 7463320..fdd519c 100644 --- a/libopie2/opienet/opcap.cpp +++ b/libopie2/opienet/opcap.cpp @@ -65,165 +65,170 @@ OPacket::OPacket( int datalink, packetheaderstruct header, const unsigned char* break; case DLT_IEEE802_11: odebug << "OPacket::OPacket(): Received Packet. Datalink = IEEE802.11" << oendl; new OWaveLanPacket( _end, (const struct ieee_802_11_header*) data, this ); break; case DLT_PRISM_HEADER: odebug << "OPacket::OPacket(): Received Packet. Datalink = PRISM_HEADER" << oendl; new OPrismHeaderPacket( _end, (const struct prism_hdr*) (unsigned char*) data, this ); break; default: owarn << "OPacket::OPacket(): Received Packet over unsupported datalink, type " << datalink << "!" << oendl; } } OPacket::~OPacket() { } timevalstruct OPacket::timeval() const { return _hdr.ts; } int OPacket::caplen() const { return _hdr.caplen; } void OPacket::updateStats( QMap<QString,int>& stats, QObjectList* l ) { if (!l) return; QObject* o = l->first(); while ( o ) { stats[o->name()]++; updateStats( stats, const_cast<QObjectList*>( o->children() ) ); o = l->next(); } } -void OPacket::dumpStructure( QObjectList* l ) +QString OPacket::dumpStructure() const { - QString packetString( "[ |" + _dumpStructure( l ) + " ]" ); - odebug << "OPacket::dumpStructure: " << packetString << oendl; + return "[ |" + _dumpStructure( const_cast<QObjectList*>( this->children() ) ) + " ]"; } -QString OPacket::_dumpStructure( QObjectList* l ) +QString OPacket::_dumpStructure( QObjectList* l ) const { if (!l) return QString::null; QObject* o = l->first(); QString str(" "); while ( o ) { str.append( o->name() ); str.append( " |" ); str += _dumpStructure( const_cast<QObjectList*>( o->children() ) ); o = l->next(); } return str; } QString OPacket::dump( int bpl ) const { static int index = 0; index++; int len = _hdr.caplen; QString str; str.sprintf( "\n<----- Packet #%04d Len = 0x%X (%d) ----->\n\n", index, len, len ); str.append( "0000: " ); QString tmp; QString bytes; QString chars; for ( int i = 0; i < len; ++i ) { tmp.sprintf( "%02X ", _data[i] ); bytes.append( tmp ); if ( (_data[i] > 31) && (_data[i]<128) ) chars.append( _data[i] ); else chars.append( '.' ); if ( !((i+1) % bpl) ) { str.append( bytes ); str.append( ' ' ); str.append( chars ); str.append( '\n' ); tmp.sprintf( "%04X: ", i+1 ); str.append( tmp ); bytes = ""; chars = ""; } } if ( (len % bpl) ) { str.append( bytes.leftJustify( 1 + 3*bpl ) ); str.append( chars ); } str.append( '\n' ); return str; } int OPacket::len() const { return _hdr.len; } +QTextStream& operator<<( QTextStream& s, const OPacket& p ) +{ + s << p.dumpStructure(); +} + + /*====================================================================================== * OEthernetPacket *======================================================================================*/ OEthernetPacket::OEthernetPacket( const unsigned char* end, const struct ether_header* data, QObject* parent ) :QObject( parent, "Ethernet" ), _ether( data ) { odebug << "Source = " << sourceAddress().toString(); odebug << "Destination = " << destinationAddress().toString(); if ( sourceAddress() == OMacAddress::broadcast ) odebug << "Source is broadcast address" << oendl; if ( destinationAddress() == OMacAddress::broadcast ) odebug << "Destination is broadcast address" << oendl; switch ( type() ) { case ETHERTYPE_IP: new OIPPacket( end, (const struct iphdr*) (data+1), this ); break; case ETHERTYPE_ARP: new OARPPacket( end, (const struct myarphdr*) (data+1), this ); break; case ETHERTYPE_REVARP: { odebug << "OPacket::OPacket(): Received Ethernet Packet : Type = RARP" << oendl; break; } default: odebug << "OPacket::OPacket(): Received Ethernet Packet : Type = UNKNOWN" << oendl; } } OEthernetPacket::~OEthernetPacket() { } OMacAddress OEthernetPacket::sourceAddress() const { return OMacAddress( _ether->ether_shost ); } OMacAddress OEthernetPacket::destinationAddress() const { return OMacAddress( _ether->ether_dhost ); } int OEthernetPacket::type() const { return ntohs( _ether->ether_type ); } @@ -1143,99 +1148,97 @@ void OPacketCapturer::dump( OPacket* p ) } int OPacketCapturer::fileno() const { if ( _open ) { return pcap_fileno( _pch ); } else { return -1; } } OPacket* OPacketCapturer::next( int time ) { fd_set fds; struct timeval tv; FD_ZERO( &fds ); FD_SET( pcap_fileno( _pch ), &fds ); tv.tv_sec = time / 1000; tv.tv_usec = time % 1000; int retval = select( pcap_fileno( _pch )+1, &fds, NULL, NULL, &tv); if ( retval > 0 ) // clear to read! return next(); else return 0; } OPacket* OPacketCapturer::next() { packetheaderstruct header; odebug << "==> OPacketCapturer::next()" << oendl; const unsigned char* pdata = pcap_next( _pch, &header ); odebug << "<== OPacketCapturer::next()" << oendl; if ( pdata && 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() ) ); - #ifndef NODEBUG - p->dumpStructure( const_cast<QObjectList*>( p->children() ) ); - #endif + odebug << "OPacket::dumpStructure: " << p->dumpStructure() << oendl; return p; } else { owarn << "OPacketCapturer::next() - no packet received!" << oendl; return 0; } } bool OPacketCapturer::open( const QString& name ) { 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 ) { owarn << "OPacketCapturer::open(): can't open libpcap with '" << name << "': " << _errbuf << oendl; return false; } odebug << "OPacketCapturer::open(): libpcap [" << name << "] opened successfully." << oendl; _pch = handle; _open = true; _stats.clear(); // in case we have an application object, create a socket notifier 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; @@ -1293,52 +1296,52 @@ bool OPacketCapturer::open( const QFile& file ) return true; } else { odebug << "OPacketCapturer::open(): can't open libpcap with '" << name << "': " << _errbuf << oendl; return false; } } bool OPacketCapturer::isOpen() const { return _open; } void OPacketCapturer::readyToReceive() { odebug << "OPacketCapturer::readyToReceive(): about to emit 'receivePacket(p)'" << oendl; 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; } int OPacketCapturer::snapShot() const { return pcap_snapshot( _pch ); } bool OPacketCapturer::swapped() const { return pcap_is_swapped( _pch ); } QString OPacketCapturer::version() const { - return QString().sprintf( "%s.%s", pcap_major_version( _pch ), pcap_minor_version( _pch ) ); + return QString().sprintf( "%d.%d", pcap_major_version( _pch ), pcap_minor_version( _pch ) ); } diff --git a/libopie2/opienet/opcap.h b/libopie2/opienet/opcap.h index f5dc5c0..b873b49 100644 --- a/libopie2/opienet/opcap.h +++ b/libopie2/opienet/opcap.h @@ -1,190 +1,195 @@ /* This file is part of the Opie Project Copyright (C) 2003 by Michael 'Mickey' Lauer <mickey@Vanille.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> +/* OPIE */ +#include <opie2/onetutils.h> /* QT */ #include <qevent.h> #include <qfile.h> #include <qhostaddress.h> #include <qobject.h> #include <qstring.h> +#include <qtextstream.h> #include <qmap.h> -/* OPIE */ -#include <opie2/onetutils.h> +/* STD */ +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> -/* Custom Network Includes */ +/* Custom Network Includes (must go here, don't reorder!) */ #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; + friend QTextStream& operator<<( QTextStream& s, const OPacket& p ); 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: - void dumpStructure( QObjectList* ); - QString _dumpStructure( QObjectList* ); + QString dumpStructure() const; + QString _dumpStructure( QObjectList* ) const; private: const packetheaderstruct _hdr; // pcap packet header const unsigned char* _data; // pcap packet data const unsigned char* _end; // end of pcap packet data }; +QTextStream& operator<<( QTextStream& s, const OPacket& p ); + /*====================================================================================== * 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 ); |