2 files changed, 92 insertions, 0 deletions

diff --git a/libopie2/opienet/opcap.cpp b/libopie2/opienet/opcap.cpp
index f1f2b4b..7a6f61b 100644
--- a/libopie2/opienet/opcap.cpp
+++ b/libopie2/opienet/opcap.cpp
@@ -316,200 +316,282 @@ QString OARPPacket::type() const
         case 4: return "RREPLY";
         case 8: return "InREQUEST";
         case 9: return "InREPLY";
         case 10: return "NAK";
         default: qWarning( "OARPPacket::type(): invalid ARP type!" ); 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 )
 
 {
     qDebug( "OUDPPacket::OUDPPacket(): decoding UDP header..." );
     qDebug( "fromPort = %d", fromPort() );
     qDebug( "  toPort = %d", toPort() );
 
     // 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 )
     {
         qDebug( "seems to be part of a DHCP conversation => creating DHCP packet." );
         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
  *======================================================================================*/
 
 
 ODHCPPacket::ODHCPPacket( const unsigned char* end, const struct dhcp_packet* data, QObject* parent )
            :QObject( parent, "DHCP" ), _dhcphdr( data )
 
 {
     qDebug( "ODHCPPacket::ODHCPPacket(): decoding DHCP information..." );
+    qDebug( "DHCP opcode seems to be %02d - '%s'", _dhcphdr->op, isRequest() ? "REQUEST" : "REPLY" );
+    qDebug( "clientAddress: %s", (const char*) clientAddress().toString() );
+    qDebug( "  yourAddress: %s", (const char*) yourAddress().toString() );
+    qDebug( "serverAddress: %s", (const char*) serverAddress().toString() );
+    qDebug( " relayAddress: %s", (const char*) relayAddress().toString() );
+    qDebug( "parsing DHCP options..." );
+
+    _type = 0;
+
+    const unsigned char* option = &_dhcphdr->options[4];
+    char tag = -1;
+    char len = -1;
+
+    while ( ( tag = *option++ ) != -1 /* end of option field */ )
+    {
+        len = *option++;
+        qDebug( "recognized DHCP option #%d, length %d", tag, len );
+
+        if ( tag == DHO_DHCP_MESSAGE_TYPE )
+            _type = *option;
+
+        option += len;
+        if ( option >= end )
+        {
+            qWarning( "DHCP parsing ERROR: sanity check says the packet is at its end!" );
+            break;
+        }
+    }
+
+    qDebug( "DHCP type seems to be '%s'", (const char*) type() );
 }
 
 
 ODHCPPacket::~ODHCPPacket()
 {
 }
 
 
+bool ODHCPPacket::isRequest() const
+{
+    return ( _dhcphdr->op == 01 );
+}
+
+
+bool ODHCPPacket::isReply() const
+{
+    return ( _dhcphdr->op == 02 );
+}
+
+
+QString ODHCPPacket::type() const
+{
+    switch ( _type )
+    {
+        case 1: return "DISCOVER";
+        case 2: return "OFFER";
+        case 3: return "REQUEST";
+        case 4: return "DECLINE";
+        case 5: return "ACK";
+        case 6: return "NAK";
+        case 7: return "RELEASE";
+        case 8: return "INFORM";
+        default: qWarning( "ODHCPPacket::type(): invalid DHCP type (%d) !", _dhcphdr->op ); return "<unknown>";
+    }
+}
+
+
+QHostAddress ODHCPPacket::clientAddress() const
+{
+    return EXTRACT_32BITS( &_dhcphdr->ciaddr );
+}
+
+
+QHostAddress ODHCPPacket::yourAddress() const
+{
+    return EXTRACT_32BITS( &_dhcphdr->yiaddr );
+}
+
+
+QHostAddress ODHCPPacket::serverAddress() const
+{
+    return EXTRACT_32BITS( &_dhcphdr->siaddr );
+}
+
+
+QHostAddress ODHCPPacket::relayAddress() const
+{
+    return EXTRACT_32BITS( &_dhcphdr->giaddr );
+}
+
 /*======================================================================================
  * OTCPPacket
  *======================================================================================*/
 
 
 OTCPPacket::OTCPPacket( const unsigned char* end, const struct tcphdr* data, QObject* parent )
            :QObject( parent, "TCP" ), _tcphdr( data )
 
 {
     qDebug( "OTCPPacket::OTCPPacket(): decoding TCP header..." );
 }
 
 
 OTCPPacket::~OTCPPacket()
 {
 }
 
 
 int OTCPPacket::fromPort() const
 {
     return EXTRACT_16BITS( &_tcphdr->source );
 }
 
 
 int OTCPPacket::toPort() const
 {
     return EXTRACT_16BITS( &_tcphdr->dest );
 }
 
 
 int OTCPPacket::seq() const
 {
     return EXTRACT_16BITS( &_tcphdr->seq );
 }
 
 
 int OTCPPacket::ack() const
 {
     return EXTRACT_16BITS( &_tcphdr->ack_seq );
 }
 
 
 int OTCPPacket::window() const
 {
     return EXTRACT_16BITS( &_tcphdr->window );
 }
 
 
 int OTCPPacket::checksum() const
 {
     return EXTRACT_16BITS( &_tcphdr->check );
 }
 
 /*======================================================================================
  * OPrismHeaderPacket
  *======================================================================================*/
 
 
 OPrismHeaderPacket::OPrismHeaderPacket( const unsigned char* end, const struct prism_hdr* data, QObject* parent )
                 :QObject( parent, "Prism" ), _header( data )
 
 {
     qDebug( "OPrismHeaderPacket::OPrismHeaderPacket(): decoding PRISM header..." );
 
     qDebug( "Signal Strength = %d", data->signal.data );
 
     new OWaveLanPacket( end, (const struct ieee_802_11_header*) (data+1), this );
 }
 
 OPrismHeaderPacket::~OPrismHeaderPacket()
 {
 }
 
 
 unsigned int OPrismHeaderPacket::signalStrength() const
 {
     return _header->signal.data;
 }
 
 /*======================================================================================
  * OWaveLanPacket
  *======================================================================================*/
 
 
 OWaveLanPacket::OWaveLanPacket( const unsigned char* end, 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( "payload is encrypted: %s", usesWep() ? "yes" : "no" );
     qDebug( "MAC1: %s", (const char*) macAddress1().toString() );
     qDebug( "MAC2: %s", (const char*) macAddress2().toString() );
diff --git a/libopie2/opienet/opcap.h b/libopie2/opienet/opcap.h
index 0c9e7da..a031dd1 100644
--- a/libopie2/opienet/opcap.h
+++ b/libopie2/opienet/opcap.h
@@ -406,194 +406,204 @@ class OWaveLanControlPacket : public QObject
 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;
     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();
 
+    QHostAddress clientAddress() const;
+    QHostAddress yourAddress() const;
+    QHostAddress serverAddress() const;
+    QHostAddress relayAddress() const;
+
+    bool isRequest() const;
+    bool isReply() const;
+    QString type() const;
+
   private:
     const struct dhcp_packet* _dhcphdr;
+    unsigned char _type;
 };
 
 /*======================================================================================
  * 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.
  * @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()