// Copyright (c) 2002 David Muse
// See the COPYING file for more information.

#ifndef RUDIMENTS_PROTOCOLENTRY_H
#define RUDIMENTS_PROTOCOLENTRY_H

#include <rudiments/private/config.h>

#if !defined(HAVE_GETPROTOBYNAME_R) || !defined(HAVE_GETPROTOBYADDR_R)
        #include <pthread.h>
#endif

#include <netdb.h>

// The protocolentry class provides methods for retrieving
// entries from /etc/protocols

class protocolentry {
        public:

                // if you need to quickly look up a specific field, use one of
                // these methods
                static  int     getAliasList(const char *protocolname,
                                                char ***aliaslist);
                static  int     getNumber(const char *protocolname,
                                                int *number);

                static  int     getName(int number, char **name);
                static  int     getAliasList(int number, char ***aliaslist);


                // if you need to look up a protocol entry and refer to multiple
                // fields, use these methods
                        protocolentry();
                        ~protocolentry();

                int     initialize(const char *protocolname);
                        // looks up a protocol entry by name
                int     initialize(int number);
                        // looks up a protocol entry by number

                char    *getName() const;
                char    **getAliasList() const;
                int     getNumber() const;

                void    print() const;
                        // prints out the protocol entry

                static  int     needsMutex();
                        // If your system doesn't support getprotobyname_r()
                        // and getprotobynumber_r() then this class needs a
                        // mutex to assure thread safety.
                        //
                        // This method returns 1 if this class needs a mutex to
                        // operate safely in a threaded environment and 0
                        // otherwise.
                static  void    setMutex(pthread_mutex_t *mutex);
                        // Allows you to supply a mutex is the class needs it.
                        // If your application is not multithreaded, then
                        // there is no need to supply a mutex.

        #include <rudiments/private/protocolentry.h>
};

#ifdef ENABLE_RUDIMENTS_INLINES
        #include <rudiments/private/protocolentryinlines.h>
#endif

#endif