first prototype for the new Ethernet LLC/SNAP Packet

[senf.git] / Packets / DefaultBundle / IpV4Packet.hh

diff --git a/Packets/DefaultBundle/IpV4Packet.hh b/Packets/DefaultBundle/IpV4Packet.hh
index 0dd8344..5b45f69 100644 (file)
--- a/Packets/DefaultBundle/IpV4Packet.hh
+++ b/Packets/DefaultBundle/IpV4Packet.hh
@@ -27,8 +27,8 @@
 #define HH_IpV4Packet_ 1
 
 // Custom includes
-#include "Socket/Protocols/INet/INet4Address.hh"
-#include "Packets/Packets.hh"
+#include "../../Socket/Protocols/INet/INet4Address.hh"
+#include "../../Packets/Packets.hh"
 
 //#include "IpV4Packet.mpp"
 ///////////////////////////////hh.p////////////////////////////////////////
@@ -67,58 +67,38 @@ namespace senf {
      */
     struct Parse_IpV4 : public PacketParserBase
     {
-        typedef Parse_UIntField <  0,  4 > Parse_Version;
-        typedef Parse_UIntField <  4,  8 > Parse_IHL;
-        typedef Parse_UInt8                Parse_8bit;
-        typedef Parse_UInt16               Parse_16bit;
-        typedef Parse_Flag      <  0     > Parse_R;
-        typedef Parse_Flag      <  1     > Parse_DF;
-        typedef Parse_Flag      <  2     > Parse_MF;
-        typedef Parse_UIntField <  3, 16 > Parse_Frag;
-        typedef Parse_UInt32               Parse_32bit;
-        typedef Parse_INet4Address         Parse_Addr;
-
-#       ifndef DOXYGEN
-
-        SENF_PACKET_PARSER_NO_INIT(Parse_IpV4);
-
-        SENF_PACKET_PARSER_DEFINE_FIXED_FIELDS(
-            ((OverlayField)( version,     Parse_Version ))
-            ((Field       )( ihl,         Parse_IHL     ))
-            ((Field       )( tos,         Parse_8bit    ))
-            ((Field       )( length,      Parse_16bit   ))
-            ((Field       )( identifier,  Parse_16bit   ))
-            ((OverlayField)( reserved,    Parse_R       ))
-            ((OverlayField)( df,          Parse_DF      ))
-            ((OverlayField)( mf,          Parse_MF      ))
-            ((Field       )( frag,        Parse_Frag    ))
-            ((Field       )( ttl,         Parse_8bit    ))
-            ((Field       )( protocol,    Parse_8bit    ))
-            ((Field       )( crc,         Parse_16bit   ))
-            ((Field       )( source,      Parse_Addr    ))
-            ((Field       )( destination, Parse_Addr    )) );
-
-#       else
-
-        Parse_Version version() const;
-        Parse_IHL     ihl() const;
-        Parse_8bit    tos() const;
-        Parse_16bit   length() const;
-        Parse_16bit   identifier() const;
-        Parse_R       reserved() const;
-        Parse_DF      df() const;
-        Parse_MF      mf() const;
-        Parse_Frag    frag() const;
-        Parse_8bit    ttl() const;
-        Parse_8bit    protocol() const;
-        Parse_16bit   crc() const;
-        Parse_Addr    source() const;
-        Parse_Addr    destination() const;
-
-#       endif
-
-        void init() {
+#       include SENF_FIXED_PARSER()
+
+        SENF_PARSER_BITFIELD( version,   4, unsigned );
+        SENF_PARSER_BITFIELD( ihl,       4, unsigned );
+
+        SENF_PARSER_FIELD( tos,         Parse_UInt8        );
+        SENF_PARSER_FIELD( length,      Parse_UInt16       );
+        SENF_PARSER_FIELD( identifier,  Parse_UInt16       );
+
+        SENF_PARSER_BITFIELD( reserved,  1, bool     );
+        SENF_PARSER_BITFIELD( df,        1, bool     );
+        SENF_PARSER_BITFIELD( mf,        1, bool     );
+        SENF_PARSER_BITFIELD( frag,     13, unsigned );
+
+        SENF_PARSER_FIELD( ttl,         Parse_UInt8        );
+        SENF_PARSER_FIELD( protocol,    Parse_UInt8        );
+        SENF_PARSER_FIELD( checksum,    Parse_UInt16       );
+        SENF_PARSER_FIELD( source,      Parse_INet4Address );
+        SENF_PARSER_FIELD( destination, Parse_INet4Address );
+
+        SENF_PARSER_INIT() {
             version() = 4;
+            // We don't support option headers at the moment ...
+            ihl() = 5;
+        }
+
+        SENF_PARSER_FINALIZE(Parse_IpV4);
+        
+        boost::uint16_t calcChecksum() const;
+
+        bool validateChecksum() const {
+            return checksum() == calcChecksum();
         }
     };
 
@@ -144,16 +124,22 @@ namespace senf {
         \par Associated registries:
             \ref IpTypes
 
+        \par Finalize action:
+            Set \a length from payload size\n
+            Set \a protocol from type of next packet if found in \ref IpTypes\n
+            Calculate \a checksum
+
         \ingroup protocolbundle_default
      */
     struct IpV4PacketType
         : public PacketTypeBase,
           public PacketTypeMixin<IpV4PacketType, IpTypes>
     {
+#ifndef DOXYGEN
         typedef PacketTypeMixin<IpV4PacketType, IpTypes> mixin;
         typedef ConcretePacket<IpV4PacketType> packet;
         typedef Parse_IpV4 parser;
-
+#endif
         using mixin::nextPacketRange;
         using mixin::nextPacketType;
         using mixin::initSize;
@@ -163,10 +149,11 @@ namespace senf {
             { return p->protocol(); }
 
         static void dump(packet p, std::ostream & os);
+        static void finalize(packet p);
     };
         
     /** \brief IpV4 packet typedef */
-    typedef IpV4PacketType::packet IpV4Packet;
+    typedef ConcretePacket<IpV4PacketType> IpV4Packet;
 }