add support for working with capture files (e.g. from tcpdump, ethereal, et.al.)

1 files changed, 50 insertions, 4 deletions

diff --git a/libopie2/opienet/opcap.h b/libopie2/opienet/opcap.h
index c9b0624..6c3ac6d 100644
--- a/libopie2/opienet/opcap.h
+++ b/libopie2/opienet/opcap.h
@@ -26,48 +26,49 @@
   -_. . .   )=.  =           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>
 #include "802_11_user.h"
 
 /* TYPEDEFS */
 typedef struct timeval timevalstruct;
 typedef struct pcap_pkthdr packetheaderstruct;
 
 /* FORWARDS */
 class OPacketCapturer;
 class QSocketNotifier;
 
 /*======================================================================================
  * OPacket - A frame on the wire
  *======================================================================================*/
 
 class OPacket : public QObject
 {
   Q_OBJECT
@@ -399,61 +400,106 @@ class OUDPPacket : public QObject
 /*======================================================================================
  * 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;
 
   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. ...
+ */
 class OPacketCapturer : public QObject
 {
   Q_OBJECT
 
   public:
+    /**
+     * Constructor.
+     */
     OPacketCapturer( QObject* parent = 0, const char* name = 0 );
+    /**
+     * Destructor.
+     */
     ~OPacketCapturer();
-
+    /**
+     * Setting the packet capturer to use blocking IO calls 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;
-
+    /**
+     * Closes the packet capturer. This is automatically done in the destructor.
+     */
     void close();
+    /**
+     * @returns the data link type.
+     * @see <pcap.h> for possible values.
+     */
     int dataLink() const;
+    /**
+     * @returns the filedescriptor 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();
-    bool open( const QString& name );
+    /**
+     * 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 );
+    /**
+     * @returns true if the packet capturer is open
+     */
     bool isOpen() const;
 
     const QMap<QString,int>& statistics() const;
 
   signals:
+    /**
+     * This signal is emitted, when a packet has been received.
+     */
     void receivedPacket( OPacket* );
 
   protected slots:
     void readyToReceive();
 
   protected:
     QString _name;          // devicename
     bool _open;             // check this before doing pcap calls
     pcap_t* _pch;           // pcap library handle
     QSocketNotifier* _sn;   // socket notifier for main loop
-    mutable char _errbuf[PCAP_ERRBUF_SIZE];
+    mutable char _errbuf[PCAP_ERRBUF_SIZE];         // holds error strings from libpcap
     QMap<QString, int> _stats; // statistics;
 };
 
 #endif // OPCAP_H