skeleton and the start of libopie2, please read README, ROADMAP and STATUS and comment...

1 files changed, 609 insertions, 0 deletions

diff --git a/libopie2/opienet/opcap.cpp b/libopie2/opienet/opcap.cpp
new file mode 100644
index 0000000..48f874f
--- a/dev/null
+++ b/libopie2/opienet/opcap.cpp
@@ -0,0 +1,609 @@
+/*
+                             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.
+
+*/
+
+/* OPIE */
+
+#include <opie2/opcap.h>
+
+/* QT */
+
+#include <qapplication.h> // don't use oapplication here (will decrease reusability in other projects)
+#include <qsocketnotifier.h>
+
+/*======================================================================================
+ * OPacket
+ *======================================================================================*/
+
+OPacket::OPacket( packetheaderstruct header, const unsigned char* data, QObject* parent )
+        :QObject( parent, "Generic" ), _hdr( header ), _data( data )
+{
+    qDebug( "OPacket::OPacket(): (Len %d, CapLen %d)" /*, ctime((const time_t*) header.ts.tv_sec)*/, header.len, header.caplen );
+
+    if ( packetCapturer()->dataLink() == DLT_EN10MB )
+    {
+        qDebug( "OPacket::OPacket(): Received Packet. Datalink = ETHERNET" );
+        new OEthernetPacket( (const struct ether_header*) data, this );
+    }
+    else
+    {
+        qDebug( "OPacket::OPacket(): Received Packet. Datalink = IEEE802.11" );
+        new OWaveLanPacket( (const struct ieee_802_11_header*) data, this );
+    }
+}
+
+
+OPacket::~OPacket()
+{
+}
+
+
+OPacketCapturer* OPacket::packetCapturer() const
+{
+    return parent()->inherits( "OPacketCapturer" ) ? static_cast<OPacketCapturer*>( parent() ) : 0;
+}
+
+
+timevalstruct OPacket::timeval() const
+{
+    return _hdr.ts;
+}
+
+
+int OPacket::caplen() const
+{
+    return _hdr.caplen;
+}
+
+
+void OPacket::dump() const
+{
+    printf( "OPacket::dump()\n" );
+    printf( "----------------\n" );
+
+    for ( int i = 0; i < _hdr.caplen; ++i )
+    {
+        printf( "%02x ", _data[i] );
+        if ( !((i+1) % 32) ) printf( "\n" );
+    }
+    printf( "\n\n" );
+}
+
+
+
+int OPacket::len() const
+{
+    return _hdr.len;
+}
+
+/*======================================================================================
+ * OEthernetPacket
+ *======================================================================================*/
+
+OEthernetPacket::OEthernetPacket( const struct ether_header* data, QObject* parent )
+                :QObject( parent, "Ethernet" ), _ether( data )
+
+{
+
+    qDebug( "Source = %s", (const char*) sourceAddress().toString() );
+    qDebug( "Destination = %s", (const char*) destinationAddress().toString() );
+
+    if ( sourceAddress() == OMacAddress::broadcast )
+        qDebug( "Source is broadcast address" );
+    if ( destinationAddress() == OMacAddress::broadcast )
+        qDebug( "Destination is broadcast address" );
+
+    switch ( type() )
+    {
+        case ETHERTYPE_IP: new OIPPacket( (const struct iphdr*) (data+1), this ); break;
+        case ETHERTYPE_ARP: { qDebug( "OPacket::OPacket(): Received Ethernet Packet : Type = ARP" ); break; }
+        case ETHERTYPE_REVARP: { qDebug( "OPacket::OPacket(): Received Ethernet Packet : Type = RARP" ); break; }
+        default: qDebug( "OPacket::OPacket(): Received Ethernet Packet : Type = UNKNOWN" );
+    }
+
+}
+
+
+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 );
+}
+
+
+/*======================================================================================
+ * OIPPacket
+ *======================================================================================*/
+
+
+OIPPacket::OIPPacket( const struct iphdr* data, QObject* parent )
+          :QObject( parent, "IP" ), _iphdr( data )
+
+{
+    qDebug( "OIPPacket::OIPPacket(): decoding IP header..." );
+
+    //qDebug( "FromAddress: %s", (const char*) inet_ntoa( *src ) );
+    //qDebug( "  ToAddress: %s", (const char*) inet_ntoa( *dst ) );
+
+    qDebug( "FromAddress: %s", (const char*) fromIPAddress().toString() );
+    qDebug( "  toAddress: %s", (const char*) toIPAddress().toString() );
+
+    switch ( protocol() )
+    {
+        case IPPROTO_UDP: new OUDPPacket( (const struct udphdr*) (data+1), this ); break;
+        case IPPROTO_TCP: new OTCPPacket( (const struct tcphdr*) (data+1), this ); break;
+        default: qDebug( "OIPPacket::OIPPacket(): unknown IP protocol type = %d", protocol() );
+    }
+
+}
+
+OIPPacket::~OIPPacket()
+{
+}
+
+
+QHostAddress OIPPacket::fromIPAddress() const
+{
+    return EXTRACT_32BITS( &_iphdr->saddr );
+}
+
+
+QHostAddress OIPPacket::toIPAddress() const
+{
+    return EXTRACT_32BITS( &_iphdr->saddr );
+}
+
+
+int OIPPacket::tos() const
+{
+    return _iphdr->tos;
+}
+
+
+int OIPPacket::len() const
+{
+    return EXTRACT_16BITS( &_iphdr->tot_len );
+}
+
+
+int OIPPacket::id() const
+{
+    return EXTRACT_16BITS( &_iphdr->id );
+}
+
+
+int OIPPacket::offset() const
+{
+    return EXTRACT_16BITS( &_iphdr->frag_off );
+}
+
+
+int OIPPacket::ttl() const
+{
+    return _iphdr->ttl;
+}
+
+
+int OIPPacket::protocol() const
+{
+    return _iphdr->protocol;
+}
+
+
+int OIPPacket::checksum() const
+{
+    return EXTRACT_16BITS( &_iphdr->check );
+}
+
+/*======================================================================================
+ * OUDPPacket
+ *======================================================================================*/
+
+
+OUDPPacket::OUDPPacket( const struct udphdr* data, QObject* parent )
+           :QObject( parent, "UDP" ), _udphdr( data )
+
+{
+    qDebug( "OUDPPacket::OUDPPacket(): decoding UDP header..." );
+}
+
+OUDPPacket::~OUDPPacket()
+{
+}
+
+
+/*======================================================================================
+ * OTCPPacket
+ *======================================================================================*/
+
+
+OTCPPacket::OTCPPacket( const struct tcphdr* data, QObject* parent )
+           :QObject( parent, "TCP" ), _tcphdr( data )
+
+{
+    qDebug( "OTCPPacket::OTCPPacket(): decoding TCP header..." );
+}
+
+OTCPPacket::~OTCPPacket()
+{
+}
+
+
+/*======================================================================================
+ * OWaveLanPacket
+ *======================================================================================*/
+
+
+OWaveLanPacket::OWaveLanPacket( const struct ieee_802_11_header* data, QObject* parent )
+                :QObject( parent, "802.11" ), _wlanhdr( data )
+
+{
+    qDebug( "OWaveLanPacket::OWaveLanPacket(): decoding IEEE 802.11 header..." );
+    qDebug( "type: %0X", type() );
+    qDebug( "subType: %0X", subType() );
+    qDebug( "duration: %d", duration() );
+    qDebug( "powermanagement: %d", usesPowerManagement() );
+    qDebug( "wep: %d", usesWep() );
+    qDebug( "MAC1: %s", (const char*) macAddress1().toString() );
+    qDebug( "MAC2: %s", (const char*) macAddress2().toString() );
+    qDebug( "MAC3: %s", (const char*) macAddress3().toString() );
+    qDebug( "MAC4: %s", (const char*) macAddress4().toString() );
+
+    switch ( type() )
+    {
+        case T_MGMT: new OWaveLanManagementPacket( (const struct ieee_802_11_mgmt_header*) data, this ); break;
+        case T_DATA: new OWaveLanDataPacket( (const struct ieee_802_11_data_header*) data, this ); break;
+        //case T_CTRL: new OWaveLanControlPacket( (const struct ieee_802_11_ctrl_header*) data, this ); break;
+        default: qDebug( "OWaveLanPacket::OWaveLanPacket(): Warning: Unknown type!" );
+    }
+}
+
+OWaveLanPacket::~OWaveLanPacket()
+{
+}
+
+
+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 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..." );
+
+    switch ( ((OWaveLanPacket*) this->parent() )->subType() )
+    {
+        case ST_BEACON:
+        {
+            qDebug( "TYPE: BEACON FRAME" );
+            qDebug( "ESSID: %s", (const char*) SSID() );
+            break;
+        }
+    }
+}
+
+
+OWaveLanManagementPacket::~OWaveLanManagementPacket()
+{
+}
+
+
+QString OWaveLanManagementPacket::SSID() const
+{
+    int length = _body->ssid.length;
+    if ( length > 32 ) length = 32;
+    char essid[length+1];
+    memcpy( &essid, _body->ssid.ssid, length );
+    essid[length] = 0x0;
+    return essid;
+}
+
+
+/*======================================================================================
+ * OWaveLanDataPacket
+ *======================================================================================*/
+
+OWaveLanDataPacket::OWaveLanDataPacket( const struct ieee_802_11_data_header* data, OWaveLanPacket* parent )
+                :QObject( parent, "802.11 Data" ), _header( data )
+{
+    //qDebug( "size of header = %d", sizeof( struct ieee_802_11_data_header ) );
+    //qDebug( "header: %0x", data );
+    const unsigned char* payload = (const unsigned char*) data + sizeof( struct ieee_802_11_data_header );
+    //qDebug( "payload: %0x", payload );
+
+    if (!( ( (OWaveLanPacket*) this->parent())->duration() )) payload -= 6; // compensation for missing last address
+
+    new OLLCPacket( (const struct ieee_802_11_802_2_header*) payload, this );
+}
+
+
+OWaveLanDataPacket::~OWaveLanDataPacket()
+{
+}
+
+
+/*======================================================================================
+ * OLLCPacket
+ *======================================================================================*/
+
+OLLCPacket::OLLCPacket( const struct ieee_802_11_802_2_header* data, QObject* parent )
+                :QObject( parent, "802.11 802_2" ), _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( (const struct iphdr*) (data+1), this ); break;
+            default: qDebug( "OLLCPacket::OLLCPacket(): Unknown Encapsulation Type" );
+        }
+
+    }
+}
+
+
+OLLCPacket::~OLLCPacket()
+{
+}
+
+/*======================================================================================
+ * OPacketCapturer
+ *======================================================================================*/
+
+OPacketCapturer::OPacketCapturer( QObject* parent, const char* name )
+                 :QObject( parent, name ), _name( QString::null ), _open( false ),
+                 _pch( 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 )
+    {
+        pcap_close( _pch );
+        _open = false;
+    }
+}
+
+
+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;
+    const unsigned char* pdata = pcap_next( _pch, &header );
+    if ( header.len )
+        return new OPacket( header, pdata, this );
+    else
+        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;
+
+    pcap_t* handle = pcap_open_live( const_cast<char*>( (const char*) name ), 1024, 0, 0, &_errbuf[0] );
+
+    if ( handle )
+    {
+        qDebug( "OPacketCapturer::open(): libpcap opened successfully." );
+        _pch = handle;
+        _open = true;
+
+        // in case we have a qapp, create a socket notifier
+        if ( qApp )
+        {
+            QSocketNotifier* sn = new QSocketNotifier( fileno(), QSocketNotifier::Read, this );
+            connect( sn, SIGNAL( activated(int) ), this, SLOT( readyToReceive() ) );
+        }
+
+        return true;
+    }
+    else
+    {
+        qDebug( "OPacketCapturer::open(): can't open libpcap: %s", _errbuf );
+        return false;
+    }
+
+}
+
+
+bool OPacketCapturer::isOpen() const
+{
+    return _open;
+}
+
+
+void OPacketCapturer::readyToReceive()
+{
+    qDebug( "OPacketCapturer::readyToReceive(): about to emit 'receivePacket(...)'" );
+    emit receivedPacket( next() );
+}
+