| -rw-r--r-- | libopie2/opienet/opcap.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/libopie2/opienet/opcap.cpp b/libopie2/opienet/opcap.cpp index fdd519c..4081d4f 100644 --- a/libopie2/opienet/opcap.cpp +++ b/libopie2/opienet/opcap.cpp @@ -1,431 +1,436 @@ /* 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. */ /* OPIE */ #include <opie2/opcap.h> #include <opie2/odebug.h> /* QT */ #include <qapplication.h> // don't use oapplication here (will decrease reusability in other projects) #include <qsocketnotifier.h> #include <qobjectlist.h> /* SYSTEM */ #include <sys/time.h> #include <sys/types.h> #include <unistd.h> /* LOCAL */ #include "udp_ports.h" +using namespace Opie::Core; + +namespace Opie { +namespace Net { + /*====================================================================================== * OPacket *======================================================================================*/ OPacket::OPacket( int datalink, 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 ); _end = (unsigned char*) data + header.len; //qDebug( "OPacket::data @ %0x, end @ %0x", data, _end ); switch ( datalink ) { case DLT_EN10MB: odebug << "OPacket::OPacket(): Received Packet. Datalink = ETHERNET" << oendl; new OEthernetPacket( _end, (const struct ether_header*) data, this ); 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(); } } QString OPacket::dumpStructure() const { return "[ |" + _dumpStructure( const_cast<QObjectList*>( this->children() ) ) + " ]"; } 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 ); } /*====================================================================================== * OIPPacket *======================================================================================*/ OIPPacket::OIPPacket( const unsigned char* end, const struct iphdr* data, QObject* parent ) :QObject( parent, "IP" ), _iphdr( data ) { odebug << "OIPPacket::OIPPacket(): decoding IP header..." << oendl; odebug << "FromAddress = " << fromIPAddress().toString() << oendl; odebug << " toAddress = " << toIPAddress().toString() << oendl; switch ( protocol() ) { case IPPROTO_UDP: new OUDPPacket( end, (const struct udphdr*) (data+1), this ); break; case IPPROTO_TCP: new OTCPPacket( end, (const struct tcphdr*) (data+1), this ); break; default: odebug << "OIPPacket::OIPPacket(): unknown IP protocol, type = " << protocol() << oendl; } } 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 ); } /*====================================================================================== * OARPPacket *======================================================================================*/ OARPPacket::OARPPacket( const unsigned char* end, const struct myarphdr* data, QObject* parent ) :QObject( parent, "ARP" ), _arphdr( data ) { odebug << "OARPPacket::OARPPacket(): decoding ARP header..." << oendl; odebug << "ARP type seems to be " << EXTRACT_16BITS( &_arphdr->ar_op ) << " = " << type() << oendl; odebug << "Sender: MAC " << senderMacAddress().toString() << " = IP " << senderIPV4Address().toString() << oendl; odebug << "Target: MAC " << targetMacAddress().toString() << " = IP " << targetIPV4Address().toString() << oendl; } OARPPacket::~OARPPacket() { } QString OARPPacket::type() const { switch ( EXTRACT_16BITS( &_arphdr->ar_op ) ) { case 1: return "REQUEST"; case 2: return "REPLY"; case 3: return "RREQUEST"; case 4: return "RREPLY"; case 8: return "InREQUEST"; case 9: return "InREPLY"; case 10: return "NAK"; default: owarn << "OARPPacket::type(): invalid ARP type!" << oendl; return "<unknown>"; } } QHostAddress OARPPacket::senderIPV4Address() const { return EXTRACT_32BITS( &_arphdr->ar_sip ); } QHostAddress OARPPacket::targetIPV4Address() const { return EXTRACT_32BITS( &_arphdr->ar_tip ); } OMacAddress OARPPacket::senderMacAddress() const { return OMacAddress( _arphdr->ar_sha ); } OMacAddress OARPPacket::targetMacAddress() const { return OMacAddress( _arphdr->ar_tha ); } /*====================================================================================== * OUDPPacket *======================================================================================*/ OUDPPacket::OUDPPacket( const unsigned char* end, const struct udphdr* data, QObject* parent ) :QObject( parent, "UDP" ), _udphdr( data ) { odebug << "OUDPPacket::OUDPPacket(): decoding UDP header..." << oendl; odebug << "fromPort = " << fromPort() << oendl; odebug << " toPort = " << toPort() << oendl; // TODO: Make this a case or a hash if we know more udp protocols if ( fromPort() == UDP_PORT_BOOTPS || fromPort() == UDP_PORT_BOOTPC || toPort() == UDP_PORT_BOOTPS || toPort() == UDP_PORT_BOOTPC ) { odebug << "seems to be part of a DHCP conversation => creating DHCP packet." << oendl; new ODHCPPacket( end, (const struct dhcp_packet*) (data+1), this ); } } OUDPPacket::~OUDPPacket() { } int OUDPPacket::fromPort() const { return EXTRACT_16BITS( &_udphdr->source ); } int OUDPPacket::toPort() const { return EXTRACT_16BITS( &_udphdr->dest ); } int OUDPPacket::length() const { return EXTRACT_16BITS( &_udphdr->len ); } int OUDPPacket::checksum() const { return EXTRACT_16BITS( &_udphdr->check ); } /*====================================================================================== * ODHCPPacket *======================================================================================*/ @@ -963,385 +968,386 @@ OWaveLanManagementChallenge::OWaveLanManagementChallenge( const unsigned char* e odebug << "OWaveLanManagementChallenge()" << oendl; } 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 ) { odebug << "OWaveLanDataPacket::OWaveLanDataPacket(): decoding frame..." << oendl; 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 ) { odebug << "OLLCPacket::OLLCPacket(): decoding frame..." << oendl; if ( !(_header->oui[0] || _header->oui[1] || _header->oui[2]) ) { owarn << "OLLCPacket::OLLCPacket(): contains an encapsulated Ethernet frame (type = " << EXTRACT_16BITS( &_header->type ) << ")" << oendl; 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; case ETH_P_ARP: new OARPPacket( end, (const struct myarphdr*) (data+1), this ); break; default: owarn << "OLLCPacket::OLLCPacket(): Unknown Encapsulation type = " << EXTRACT_16BITS( &_header->type ) << oendl; } } } OLLCPacket::~OLLCPacket() { } /*====================================================================================== * OWaveLanControlPacket *======================================================================================*/ OWaveLanControlPacket::OWaveLanControlPacket( const unsigned char* end, const struct ieee_802_11_control_header* data, OWaveLanPacket* parent ) :QObject( parent, "802.11 Control" ), _header( data ) { odebug << "OWaveLanControlPacket::OWaveLanDataControl(): decoding frame..." << oendl; odebug << "Detected subtype is " << controlType() << oendl; } OWaveLanControlPacket::~OWaveLanControlPacket() { } QString OWaveLanControlPacket::controlType() const { switch ( FC_SUBTYPE( EXTRACT_LE_16BITS( &_header->fc ) ) ) { case CTRL_PS_POLL: return "PowerSavePoll"; break; case CTRL_RTS: return "RequestToSend"; break; case CTRL_CTS: return "ClearToSend"; break; case CTRL_ACK: return "Acknowledge"; break; case CTRL_CF_END: return "ContentionFreeEnd"; break; case CTRL_END_ACK: return "AcknowledgeEnd"; break; default: owarn << "OWaveLanControlPacket::managementType(): unhandled subtype " << FC_SUBTYPE( EXTRACT_LE_16BITS( &_header->fc ) ) << oendl; return "Unknown"; } } /*====================================================================================== * OPacketCapturer *======================================================================================*/ OPacketCapturer::OPacketCapturer( QObject* parent, const char* name ) :QObject( parent, name ), _name( QString::null ), _open( false ), _pch( 0 ), _pcd( 0 ), _sn( 0 ) { } OPacketCapturer::~OPacketCapturer() { if ( _open ) { odebug << "OPacketCapturer::~OPacketCapturer(): pcap still open, autoclosing." << oendl; close(); } } void OPacketCapturer::setBlocking( bool b ) { if ( pcap_setnonblock( _pch, 1-b, _errbuf ) != -1 ) { odebug << "OPacketCapturer::setBlocking(): blocking mode changed successfully." << oendl; } else { odebug << "OPacketCapturer::setBlocking(): can't change blocking mode: " << _errbuf << oendl; } } bool OPacketCapturer::blocking() const { int b = pcap_getnonblock( _pch, _errbuf ); if ( b == -1 ) { odebug << "OPacketCapturer::blocking(): can't get blocking mode: " << _errbuf << oendl; return -1; } return !b; } void OPacketCapturer::closeDumpFile() { if ( _pcd ) { pcap_dump_close( _pcd ); _pcd = 0; } pcap_close( _pch ); } void OPacketCapturer::close() { if ( _open ) { if ( _sn ) { _sn->disconnect( SIGNAL( activated(int) ), this, SLOT( readyToReceive() ) ); delete _sn; } closeDumpFile(); _open = false; } odebug << "OPacketCapturer::close() --- dumping capturing statistics..." << oendl; odebug << "--------------------------------------------------" << oendl; for( QMap<QString,int>::Iterator it = _stats.begin(); it != _stats.end(); ++it ) odebug << it.key() << " = " << it.data() << oendl; odebug << "--------------------------------------------------" << oendl; } int OPacketCapturer::dataLink() const { return pcap_datalink( _pch ); } void OPacketCapturer::dump( OPacket* p ) { if ( !_pcd ) { owarn << "OPacketCapturer::dump() - cannot dump without open capture file!" << oendl; return; } pcap_dump( (u_char*) _pcd, &p->_hdr, p->_data ); } 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() ) ); 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; } bool OPacketCapturer::openDumpFile( const QString& filename ) { pcap_dumper_t* dump = pcap_dump_open( _pch, const_cast<char*>( (const char*) filename ) ); if ( !dump ) { owarn << "OPacketCapturer::open(): can't open dump with '" << filename << "': " << _errbuf << oendl; return false; } odebug << "OPacketCapturer::open(): dump [" << filename << "] opened successfully." << oendl; _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 ) { odebug << "OPacketCapturer::open(): libpcap opened successfully." << oendl; _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 { 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( "%d.%d", pcap_major_version( _pch ), pcap_minor_version( _pch ) ); } - +} +} |