add defines for UDP-based protocols

detect DHCP and link it into the packet chain

2 files changed, 112 insertions, 10 deletions

diff --git a/libopie2/opienet/opcap.cpp b/libopie2/opienet/opcap.cpp
index cc8ce7f..f1f2b4b 100644
--- a/libopie2/opienet/opcap.cpp
+++ b/libopie2/opienet/opcap.cpp
@@ -28,32 +28,34 @@
                              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>
 #include <qobjectlist.h>
 
+#include "udp_ports.h"
+
 /*======================================================================================
  * 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:
             qDebug( "OPacket::OPacket(): Received Packet. Datalink = ETHERNET" );
@@ -341,61 +343,72 @@ OMacAddress OARPPacket::senderMacAddress() const
 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 _udphdr->source;
+    return EXTRACT_16BITS( &_udphdr->source );
 }
 
 
 int OUDPPacket::toPort() const
 {
-    return _udphdr->dest;
+    return EXTRACT_16BITS( &_udphdr->dest );
 }
 
 
 int OUDPPacket::length() const
 {
-    return _udphdr->len;
+    return EXTRACT_16BITS( &_udphdr->len );
 }
 
 
 int OUDPPacket::checksum() const
 {
-    return _udphdr->check;
+    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..." );
 }
 
 
@@ -411,63 +424,63 @@ ODHCPPacket::~ODHCPPacket()
 
 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 _tcphdr->source;
+    return EXTRACT_16BITS( &_tcphdr->source );
 }
 
 
 int OTCPPacket::toPort() const
 {
-    return _tcphdr->dest;
+    return EXTRACT_16BITS( &_tcphdr->dest );
 }
 
 
 int OTCPPacket::seq() const
 {
-    return _tcphdr->seq;
+    return EXTRACT_16BITS( &_tcphdr->seq );
 }
 
 
 int OTCPPacket::ack() const
 {
-    return _tcphdr->ack_seq;
+    return EXTRACT_16BITS( &_tcphdr->ack_seq );
 }
 
 
 int OTCPPacket::window() const
 {
-    return _tcphdr->window;
+    return EXTRACT_16BITS( &_tcphdr->window );
 }
 
 
 int OTCPPacket::checksum() const
 {
-    return _tcphdr->check;
+    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 );
diff --git a/libopie2/opienet/udp_ports.h b/libopie2/opienet/udp_ports.h
new file mode 100644
index 0000000..5e92497
--- a/dev/null
+++ b/libopie2/opienet/udp_ports.h
@@ -0,0 +1,89 @@
+/*
+ * This file has been generated by doing
+ * find . -name "*"|xargs grep -h '#define UDP_PORT' > udp_ports.h
+ * in the root directory of Ethereal 0.9.15. Cudos to the Ethereal Team.
+ * -- Michael 'Mickey' Lauer <mickeyl@handhelds.org>
+ */
+
+#define UDP_PORT_AODV	654
+#define UDP_PORT_LENGTH     2
+#define UDP_PORT_OFFSET     PARAMETER_VALUE_OFFSET
+#define UDP_PORT_RAS1 1718
+#define UDP_PORT_RAS2 1719
+#define UDP_PORT_CPHA	8116
+#define UDP_PORT_DDTP	1052
+#define UDP_PORT_CUPS	631
+#define UDP_PORT_DLSW		2067
+#define UDP_PORT_ISAKMP	500
+#define UDP_PORT_L2TP   1701
+#define UDP_PORT_IAPP     2313
+#define UDP_PORT_HSRP   1985
+#define UDP_PORT_SSDP			1900
+#define UDP_PORT_TACACS	49
+#define UDP_PORT_CLDAP			389
+#define UDP_PORT_VINES	573
+#define UDP_PORT_NBNS	137
+#define UDP_PORT_NBDGM	138
+#define UDP_PORT_XYPLEX    173
+#define UDP_PORT_PIM_RP_DISC 496
+#define UDP_PORT_SLIMP3_V1    1069
+#define UDP_PORT_SLIMP3_V2    3483
+#define UDP_PORT_RMCP		623
+#define UDP_PORT_RMCP_SECURE	664
+#define UDP_PORT_SYSLOG 514
+#define UDP_PORT_SNMP		161
+#define UDP_PORT_SNMP_TRAP	162
+#define UDP_PORT_TFTP    69
+#define UDP_PORT_TIME    37
+#define UDP_PORT_STUN 	3478
+#define UDP_PORT_SRVLOC	427
+#define UDP_PORT_TZSP	0x9090
+#define UDP_PORT_WCCP	2048
+#define UDP_PORT_MSPROXY 1745
+#define UDP_PORT_BOOTPS  67
+#define UDP_PORT_BOOTPC  68
+#define UDP_PORT_XDMCP 177
+#define UDP_PORT_DHCPV6_DOWNSTREAM	546
+#define UDP_PORT_DHCPV6_UPSTREAM	547
+#define UDP_PORT_DNS     53
+#define UDP_PORT_MDNS    5353
+#define UDP_PORT_ICP    3130
+#define UDP_PORT_ICQ	4000
+#define UDP_PORT_IPX    213		/* RFC 1234 */
+#define UDP_PORT_LDP 646
+#define UDP_PORT_LLC1   12000
+#define UDP_PORT_LLC2   12001
+#define UDP_PORT_LLC3   12002
+#define UDP_PORT_LLC4   12003
+#define UDP_PORT_LLC5   12004
+#define UDP_PORT_MIP    434
+#define UDP_PORT_NCP		524
+#define UDP_PORT_NTP	123
+#define UDP_PORT_RIP    520
+#define UDP_PORT_SAP	9875
+#define UDP_PORT_SIP 5060
+#define UDP_PORT_TIMED	525
+#define UDP_PORT_RIPNG  521
+#define UDP_PORT_WSP			9200		/* wap-wsp			*/
+#define UDP_PORT_WTP_WSP		9201		/* wap-wsp-wtp		*/
+#define UDP_PORT_WTLS_WSP		9202		/* wap-wsp-s		*/
+#define UDP_PORT_WTLS_WTP_WSP		9203		/* wap-wsp-wtp-s	*/
+#define UDP_PORT_WSP_PUSH		2948		/* wap-wsp		*/
+#define UDP_PORT_WTLS_WSP_PUSH		2949		/* wap-wsp-s		*/
+#define UDP_PORT_WHO    513
+#define UDP_PORT_KERBEROS		88
+#define UDP_PORT_SFLOW 6343
+#define UDP_PORT_LAPLINK 1547
+#define UDP_PORT_NETFLOW	2055
+#define UDP_PORT_RX_LOW		7000
+#define UDP_PORT_RX_HIGH	7009
+#define UDP_PORT_RX_AFS_BACKUPS	7021
+#define UDP_PORT_MGCP_GATEWAY 2427
+#define UDP_PORT_MGCP_CALLAGENT 2727
+#define UDP_PORT_PCLI 9000
+#define UDP_PORT_ARTNET 0x1936
+#define UDP_PORT_TERREDO 3544
+#define UDP_PORT_RADIUS		1645
+#define UDP_PORT_RADIUS_NEW	1812
+#define UDP_PORT_RADACCT	1646
+#define UDP_PORT_RADACCT_NEW	1813