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 9d451c5..5b45f69 100644 (file)
--- a/Packets/DefaultBundle/IpV4Packet.hh
+++ b/Packets/DefaultBundle/IpV4Packet.hh
@@ -20,17 +20,42 @@
 // Free Software Foundation, Inc.,
 // 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
+/** \file
+    \brief IpV4Packet public header */
+
 #ifndef HH_IpV4Packet_
 #define HH_IpV4Packet_ 1
 
 // Custom includes
-#include "Packets/Packets.hh"
+#include "../../Socket/Protocols/INet/INet4Address.hh"
+#include "../../Packets/Packets.hh"
 
 //#include "IpV4Packet.mpp"
 ///////////////////////////////hh.p////////////////////////////////////////
 
 namespace senf {
 
+    /** \brief Parse in IpV4 address
+
+        \see INet4Address
+     */
+    struct Parse_INet4Address : public PacketParserBase
+    {
+        Parse_INet4Address(data_iterator i, state_type s) : PacketParserBase(i,s,fixed_bytes) {}
+
+        ///////////////////////////////////////////////////////////////////////////
+
+        typedef INet4Address value_type;
+        static const size_type fixed_bytes = 4u;
+
+        value_type value() const { return value_type::from_data(i()); }
+        void value(value_type const & v) { std::copy(v.begin(), v.end(), i()); }
+        operator value_type() { return value(); }
+        byte & operator[](size_type index) { return *boost::next(i(),index); }
+        Parse_INet4Address const & operator= (value_type const & other) 
+            { value(other); return *this; }
+    };
+
     /** \brief Parse an IpV4 packet
 
         Parser implementing the IpV4 header. The fields implemented are:
@@ -42,57 +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;
-
-#       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_32bit   ))
-            ((Field       )( destination, Parse_32bit   )) );
-
-#       else
-
-        Parse_Version version();
-        Parse_IHL ihl();
-        Parse_8bit tos();
-        Parse_16bit length();
-        Parse_16bit identifier();
-        Parse_R reserved();
-        Parse_DF df();
-        Parse_MF mf();
-        Parse_Frag frag();
-        Parse_8bit ttl();
-        Parse_8bit protocol();
-        Parse_16bit crc();
-        Parse_32bit source();
-        Parse_32bit destination();
-
-#       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();
         }
     };
 
@@ -118,16 +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;
@@ -137,10 +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;
 }