// beginning. This really is just another type of deque
// implementation.
-
-/** \mainpage The SENF Packet Library
-
- \section arch Overall Architecture
-
- The general Architecture of the Packet Framework (pkf for short)
- is seperated into two components: The basic packet handling and
- the parser framework.
-
- The basic packet handling implements a packet interpreter
- chain. Every packet is represented as a chain of interpreters
- where each interpreter is a facade looking into the same
- packet. Each interpreter will interpret a specific header of a
- packet. For example, an ethernet frame might have an interpreter
- chain consisting of EthernetPacket, IPPacket, UDPPacket and
- DataPacket. Each of these interpreters will interpret a section of
- the raw data bytes. The interpreter ranges overlap since every
- packet also includes it's payload.
-
- The parser framework is used to interpret the raw bytes of a
- specific packet and parse the values present in that packet. For
- example, Parse_Ethernet will parse the ethernet source MAC,
- destination MAC and ethertype given any random access iterator to
- the first byte of the ethernet frame. Parsers are extremely light
- classes. They are temporary classes passed around by value. In
- most cases, they are just comprised of a single pointer adorned
- with type information.
-
- \section handling Packet Handling
-
- The packet handling is implemented within
- satcom::pkf::Packet. This class is the baseclass to all packet
- interpreter facades. To implement a new packet type, publically
- derive from satcom::pkf::Packet and implement the virtual
- interface (see the class documentation for details).
-
- \section framework Parser Framework
-
- The parser framework provides an abstract framwork to parse packet
- oriented data. A Parser is a template class taking an arbitrary
- iterator as input and allowing random access to data elements of
- the interpreted type, like source and destination MAC of an
- ethernet frame. The parser framework is to be used hierarchically
- and recursively, the parser methods should return further parsers
- which can return further parsers and so on.
-
- The parser framework contains some basic parsers to be used to
- build up more complex parsers:
-
- - ParseInt.hh: Lots of parsers for integer numbers like
- satcom::pkf::Parse_UInt8, for integer bitfields like
- satcom::pkf::Parse_UIntField and satcom::pkf::Parse_Flag to
- parse boolean flags.
-
- - ParseArray.hh: The satcom::pkf::Parse_Array parser to parse
- arbitrary fixed-size arrays of fixed-size elements (that is
- sub-parsers).
-
- - ParseVec.hh: The satcom::pkf::Parse_Vector parser to parse
- dynamically sized arrays of fixed-size elements (that is
- sub-parsers).
-
- See satcom::pkf::ParserBase for further information.
-
- \section stuff Other Utilities
-
- The pkf also comprises some additional utilities to support the
- development of packet classes.
-
- The satcom::pkf::PacketRegistry implements a registry of packets
- keyed by an arbitrary type. The registry is used to find a packet
- type given some kind of id (like the ethertype value from the
- ethernet header). Together with it's support classes (especially
- satcom::pkf::PacketRegistryMixin) this class greatly simplifies
- implementing the needed table lookups.
- */
-
/** \file
\brief Main packet interface
*/
#include "Packet.mpp"
// ////////////////////////////hh.p////////////////////////////////////////
-namespace satcom {
-namespace pkf {
+namespace senf {
namespace impl { template <class OtherPacket> class PkReg_EntryImpl; }
namespace impl { class PacketImpl; }
This class is the base class of all Packets. It implements the
generic Packet interface and provides the packet management
- framework. satcom::pkf::Packet manages the necessary memory
+ framework. senf::Packet manages the necessary memory
resources and controlls the chain of packet interpreters.
The Packet user always interfaces with the pkf via a Packet
\code
class ExamplePacket
- : public satcom::pkf::Packet
+ : public senf::Packet
{
public:
typedef ptr_t<ExamplePacket>::ptr ptr;
private:
template <class Arg>
ExamplePacket(Arg arg [, other args ... ])
- : satcom::pkf::Packet(arg)
+ : senf::Packet(arg)
{}
virtual void v_nextInterpreter() const
// calculate checksum etc
}
- friend class satcom::pkf::Packet;
+ friend class senf::Packet;
};
\endcode
Please do not implement the methods inline to not clutter up
the header file. This is done here in the example to simplify
it. If a class is to be registered in some
- satcom:pkf::PacketRegistry, it must not take any additional
+ senf:PacketRegistry, it must not take any additional
constructor parameters.
After having implemented the bare framework, the most comman
\code
class ExamplePacket
- : public satcom::pkf::Packet,
- public Parse_Example<satcom::pkf::Packet::iterator,
+ : public senf::Packet,
+ public Parse_Example<senf::Packet::iterator,
ExamplePacket>
{
private:
template <class InputIterator>
ExamplePacket(InputIterator begin, InputIterator end)
- : satcom::pkf::Packet(begin,end)
+ : senf::Packet(begin,end)
{}
};
\endcode
- See the satcom::pkf::ParserBase Documentation for how to
+ See the senf::ParserBase Documentation for how to
implement Parse_Example.
The implementation of v_nextInterpreter most of the time
relies on some packet registry. This is simplified using the
- satcom::pkf::PacketRegistryMixin class as follows. Again, we
+ senf::PacketRegistryMixin class as follows. Again, we
only show the differences from the preceding Example:
\code
};
class ExamplePacket
- : public satcom::pkf::Packet,
- public Parse_Example<satcom::pkf::Packet::iterator,
+ : public senf::Packet,
+ public Parse_Example<senf::Packet::iterator,
ExamplePacket>,
- public satcom::pkf::PacketRegistryMixin<ExampleRegistry,
+ public senf::PacketRegistryMixin<ExampleRegistry,
ExamplePacket>
{
- using satcom::pkf::Packet::registerInterpreter;
- using satcom::pkf::PacketRegsitryMixin<ExampleRegistry,ExamplePacket>::registerInterpreter;
+ using senf::Packet::registerInterpreter;
+ using senf::PacketRegsitryMixin<ExampleRegistry,ExamplePacket>::registerInterpreter;
private:
virtual void v_nextInterpreter() const
{
\endcode
For further details on the packet registry, see
- satcom::pkf::PacketRegistry.
+ senf::PacketRegistry.
\section packet_impl Implementation details
imporved by either allocating some headroom/tailroom in the
vector and using this when inserting data at the beginning or
end. Alternatively, a new container class (like the
- satcom::lib::deque_list) could be used to support zero-copy
+ senf::deque_list) could be used to support zero-copy
semantics.
At the moment, we leave the implementation at
typedef std::vector<byte> raw_container;
typedef boost::shared_ptr<Packet> interpreter_list_ptr;
- typedef std::list<satcom::pkf::Packet::interpreter_list_ptr> interpreter_list;
+ typedef std::list<senf::Packet::interpreter_list_ptr> interpreter_list;
typedef unsigned refcount_t;
///@}
instance. The new instance is automatically added to the
interpreter chain after the current interpreter.
- See also satcom::pkf::PacketRegistryMixin on how to
+ See also senf::PacketRegistryMixin on how to
use a Registry to find the next interpreters implementing
class.
*/
struct TruncatedPacketException : public std::exception
{ virtual char const * what() const throw() { return "truncated packet"; } };
-}}
+}
// ////////////////////////////hh.e////////////////////////////////////////
#include "Packet.cci"
\f
// Local Variables:
// mode: c++
-// c-file-style: "satcom"
+// c-file-style: "senf"
// End:
projects / senf.git / blobdiff