mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-16 12:30:13 +01:00
267 lines
12 KiB
C++
267 lines
12 KiB
C++
// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
// % Project : GUSI - Grand Unified Socket Interface
|
|
// % File : GUSINetDB.nw - Convert between names and adresses
|
|
// % Author : Matthias Neeracher
|
|
// % Language : C++
|
|
// %
|
|
// % $Log: GUSINetDB.h,v $
|
|
// % Revision 1.1 2001/03/11 22:37:15 sgehani%netscape.com
|
|
// % First Checked In.
|
|
// %
|
|
// % Revision 1.10 2000/12/23 06:11:55 neeri
|
|
// % Add SSH service
|
|
// %
|
|
// % Revision 1.9 2000/05/23 07:10:35 neeri
|
|
// % Improve formatting
|
|
// %
|
|
// % Revision 1.8 2000/03/15 07:18:43 neeri
|
|
// % Fix GUSIBuiltinServiceDB::sServices
|
|
// %
|
|
// % Revision 1.7 1999/11/15 07:23:23 neeri
|
|
// % Fix gethostname for non-TCP/IP case
|
|
// %
|
|
// % Revision 1.6 1999/08/26 05:45:05 neeri
|
|
// % Fixes for literate edition of source code
|
|
// %
|
|
// % Revision 1.5 1999/05/30 03:09:30 neeri
|
|
// % Added support for MPW compilers
|
|
// %
|
|
// % Revision 1.4 1999/03/17 09:05:10 neeri
|
|
// % Added GUSITimer, expanded docs
|
|
// %
|
|
// % Revision 1.3 1998/11/22 23:06:58 neeri
|
|
// % Releasing 2.0a4 in a hurry
|
|
// %
|
|
// % Revision 1.2 1998/10/25 11:33:38 neeri
|
|
// % Fixed disastrous bug in inet_addr, support alternative NL conventions
|
|
// %
|
|
// % Revision 1.1 1998/10/11 16:45:20 neeri
|
|
// % Ready to release 2.0a2
|
|
// %
|
|
// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
//
|
|
// \chapter{Converting Between Names and IP Addresses}
|
|
//
|
|
// The [[GUSINetDB]] class coordinates access to the domain name server database.
|
|
//
|
|
// The [[GUSIServiceDB]] class is responsible for a database of TCP/IP service
|
|
// name to port number mappings.
|
|
//
|
|
// The [[hostent]] and [[servent]] classes are somewhat inconvenient to set up as
|
|
// they reference extra chunks of memory, so we define the wrapper classes
|
|
// [[GUSIhostent]] and [[GUSIservent]].
|
|
//
|
|
// <GUSINetDB.h>=
|
|
#ifndef _GUSINetDB_
|
|
#define _GUSINetDB_
|
|
|
|
#ifdef GUSI_SOURCE
|
|
#include "GUSISpecific.h"
|
|
|
|
#include <sys/types.h>
|
|
#include <netdb.h>
|
|
#include <arpa/inet.h>
|
|
|
|
#include <ConditionalMacros.h>
|
|
|
|
#if PRAGMA_STRUCT_ALIGN
|
|
#pragma options align=native
|
|
#endif
|
|
|
|
// \section{Definition of [[GUSIhostent]] and [[GUSIservent]]}
|
|
//
|
|
// A [[GUSIhostent]] may need a lot of data, so we allocate the name data
|
|
// dynamically.
|
|
//
|
|
// <Definition of class [[GUSIhostent]]>=
|
|
class GUSIhostent : public hostent {
|
|
public:
|
|
GUSIhostent();
|
|
|
|
void Alloc(size_t size);
|
|
|
|
char * fAlias[16];
|
|
char * fAddressList[16];
|
|
char * fName;
|
|
size_t fAlloc;
|
|
char fAddrString[16];
|
|
};
|
|
|
|
extern "C" void GUSIKillHostEnt(void * hostent);
|
|
|
|
// A [[GUSIservent]] typically will remain more modest in its needs, so the
|
|
// data is allocated statically.
|
|
//
|
|
// <Definition of class [[GUSIservent]]>=
|
|
class GUSIservent : public servent {
|
|
public:
|
|
GUSIservent();
|
|
|
|
char * fAlias[8];
|
|
char fName[256];
|
|
};
|
|
// \section{Definition of [[GUSIServiceDB]]}
|
|
//
|
|
// [[GUSIServiceDB]] is a singleton, used as a primitive iterator. The semantics of
|
|
// these iterators conform only very superficially to real iterators:
|
|
//
|
|
// \begin{itemize}
|
|
// \item Only a single instance of the iterator is supported.
|
|
// \item Comparison operators all compare against [[end]], no matter what
|
|
// arguments are passed.
|
|
// \end{itemize}
|
|
//
|
|
// <Definition of class [[GUSIServiceDB]]>=
|
|
extern "C" void GUSIKillServiceDBData(void * entry);
|
|
|
|
class GUSIServiceDB {
|
|
public:
|
|
static GUSIServiceDB * Instance();
|
|
// Iterating is accomplished by a public interface conforming to STL iterator
|
|
// protocols.
|
|
//
|
|
// <Iterating over the [[GUSIServiceDB]]>=
|
|
class iterator {
|
|
public:
|
|
inline bool operator==(const iterator & other);
|
|
inline bool operator!=(const iterator & other);
|
|
inline iterator & operator++();
|
|
inline servent * operator*();
|
|
};
|
|
inline static iterator begin();
|
|
inline static iterator end();
|
|
protected:
|
|
static GUSIServiceDB * sInstance;
|
|
GUSIServiceDB() {}
|
|
virtual ~GUSIServiceDB() {}
|
|
|
|
friend void GUSIKillServiceDBData(void * entry);
|
|
|
|
// This interface does not access any data elements in the iterator, but directly
|
|
// calls through to a private interface in the [[GUSIServiceDB]], which explains
|
|
// the limitations in the iterator implementation.
|
|
//
|
|
// <Internal iterator protocol of [[GUSIServiceDB]]>=
|
|
friend class iterator;
|
|
|
|
class Data {
|
|
public:
|
|
Data() : fCurrent(0) {}
|
|
|
|
servent * fCurrent;
|
|
GUSIservent fServent;
|
|
};
|
|
typedef GUSISpecificData<Data, GUSIKillServiceDBData> SpecificData;
|
|
static SpecificData sData;
|
|
|
|
virtual void Reset() = 0;
|
|
virtual void Next() = 0;
|
|
};
|
|
// \section{Definition of [[GUSINetDB]]}
|
|
//
|
|
//
|
|
// <Definition of class [[GUSINetDB]]>=
|
|
class GUSINetDB {
|
|
public:
|
|
// [[GUSINetDB]] is a singleton, but usually instantiated by an instance of a
|
|
// derived class.
|
|
//
|
|
// <Constructing instances of [[GUSINetDB]]>=
|
|
static GUSINetDB * Instance();
|
|
// The public interface of [[GUSINetDB]] consists of three areas. The first set of
|
|
// calls is concerned with host names and IP numbers.
|
|
//
|
|
// <[[GUSINetDB]] host database>=
|
|
virtual hostent * gethostbyname(const char * name);
|
|
virtual hostent * gethostbyaddr(const void * addr, size_t len, int type);
|
|
virtual char * inet_ntoa(in_addr inaddr);
|
|
virtual in_addr_t inet_addr(const char *address);
|
|
virtual long gethostid();
|
|
virtual int gethostname(char *machname, int buflen);
|
|
// The next set of calls is concerned with TCP and UDP services.
|
|
//
|
|
// <[[GUSINetDB]] service database>=
|
|
virtual servent * getservbyname(const char * name, const char * proto);
|
|
virtual servent * getservbyport(int port, const char * proto);
|
|
virtual servent * getservent();
|
|
virtual void setservent(int stayopen);
|
|
virtual void endservent();
|
|
// Finally, there is a set of calls concerned with protocols.
|
|
//
|
|
// <[[GUSINetDB]] protocol database>=
|
|
virtual protoent * getprotobyname(const char * name);
|
|
virtual protoent * getprotobynumber(int proto);
|
|
virtual protoent * getprotoent();
|
|
virtual void setprotoent(int stayopen);
|
|
virtual void endprotoent();
|
|
protected:
|
|
GUSINetDB();
|
|
virtual ~GUSINetDB() {}
|
|
// \section{Implementation of [[GUSINetDB]]}
|
|
//
|
|
// [[GUSINetDB]] is a singleton, but typically implemented by an instance
|
|
// of a subclass (stored into [[fInstance]] by that subclass) rather than the
|
|
// base class.
|
|
//
|
|
// <Privatissima of [[GUSINetDB]]>=
|
|
static GUSINetDB * sInstance;
|
|
// The service database is implemented in terms of [[GUSIServiceDB]]. Only
|
|
// [[getservent]] and [[setservent]] accesse [[GUSIServiceDB]] directly, however.
|
|
//
|
|
// <Privatissima of [[GUSINetDB]]>=
|
|
bool fServiceOpen;
|
|
GUSIServiceDB::iterator fServiceIter;
|
|
// The protocol database is similar, in principle, to the service database, but it
|
|
// lends itself naturally to a much simpler implementation.
|
|
//
|
|
// <Privatissima of [[GUSINetDB]]>=
|
|
int fNextProtocol;
|
|
static protoent sProtocols[2];
|
|
};
|
|
|
|
#if PRAGMA_STRUCT_ALIGN
|
|
#pragma options align=reset
|
|
#endif
|
|
|
|
#ifdef GUSI_INTERNAL
|
|
|
|
// Iterators can be defined without regard to the implementation of the
|
|
// [[GUSIServiceDB]] currently used.
|
|
//
|
|
// <Inline member functions for class [[GUSIServiceDB]]>=
|
|
GUSIServiceDB::iterator GUSIServiceDB::begin()
|
|
{
|
|
Instance()->Reset();
|
|
Instance()->Next();
|
|
|
|
return iterator();
|
|
}
|
|
GUSIServiceDB::iterator GUSIServiceDB::end()
|
|
{
|
|
return iterator();
|
|
}
|
|
bool GUSIServiceDB::iterator::operator==(const GUSIServiceDB::iterator &)
|
|
{
|
|
return !GUSIServiceDB::sData->fCurrent;
|
|
}
|
|
bool GUSIServiceDB::iterator::operator!=(const GUSIServiceDB::iterator &)
|
|
{
|
|
return GUSIServiceDB::sData->fCurrent
|
|
== static_cast<servent *>(nil);
|
|
}
|
|
GUSIServiceDB::iterator & GUSIServiceDB::iterator::operator++()
|
|
{
|
|
GUSIServiceDB::Instance()->Next();
|
|
return *this;
|
|
}
|
|
servent * GUSIServiceDB::iterator::operator*()
|
|
{
|
|
return GUSIServiceDB::sData->fCurrent;
|
|
}
|
|
|
|
#endif /* GUSI_INTERNAL */
|
|
|
|
#endif /* GUSI_SOURCE */
|
|
|
|
#endif /* _GUSINetDB_ */
|