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117 lines
3.7 KiB
117 lines
3.7 KiB
/*
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PLIB - A Suite of Portable Game Libraries
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Copyright (C) 1998,2002 Steve Baker
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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For further information visit http://plib.sourceforge.net
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$Id: netChannel.h 1899 2004-03-21 17:41:07Z sjbaker $
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*/
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/****
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* NAME
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* netChannel - network channel class
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*
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* DESCRIPTION
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* netChannel is adds event-handling to the low-level
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* netSocket class. Otherwise, it can be treated as
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* a normal non-blocking socket object.
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*
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* The direct interface between the netPoll() loop and
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* the channel object are the handleReadEvent and
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* handleWriteEvent methods. These are called
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* whenever a channel object 'fires' that event.
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*
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* The firing of these low-level events can tell us whether
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* certain higher-level events have taken place, depending on
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* the timing and state of the connection.
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*
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* AUTHORS
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* Sam Rushing <rushing@nightmare.com> - original version for Medusa
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* Dave McClurg <dpm@efn.org> - modified for use in PLIB
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*
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* CREATION DATE
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* Dec-2000
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*
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****/
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#ifndef NET_CHANNEL_H
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#define NET_CHANNEL_H
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#include "netSocket.h"
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class netChannel : public netSocket
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{
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bool closed, connected, accepting, write_blocked, should_delete ;
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netChannel* next_channel ;
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friend bool netPoll (unsigned int timeout);
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public:
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netChannel () ;
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virtual ~netChannel () ;
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void setHandle (int s, bool is_connected = true);
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bool isConnected () const { return connected; }
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bool isClosed () const { return closed; }
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void shouldDelete () { should_delete = true ; }
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// --------------------------------------------------
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// socket methods
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// --------------------------------------------------
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bool open ( void ) ;
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void close ( void ) ;
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int listen ( int backlog ) ;
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int connect ( const char* host, int port ) ;
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int send ( const void * buf, int size, int flags = 0 ) ;
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int recv ( void * buf, int size, int flags = 0 ) ;
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// poll() eligibility predicates
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virtual bool readable (void) { return (connected || accepting); }
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virtual bool writable (void) { return (!connected || write_blocked); }
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// --------------------------------------------------
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// event handlers
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// --------------------------------------------------
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void handleReadEvent (void);
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void handleWriteEvent (void);
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// These are meant to be overridden.
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virtual void handleClose (void) {
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//ulSetError(UL_WARNING,"Network: %d: unhandled close",getHandle());
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}
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virtual void handleRead (void) {
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ulSetError(UL_WARNING,"Network: %d: unhandled read",getHandle());
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}
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virtual void handleWrite (void) {
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ulSetError(UL_WARNING,"Network: %d: unhandled write",getHandle());
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}
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virtual void handleAccept (void) {
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ulSetError(UL_WARNING,"Network: %d: unhandled accept",getHandle());
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}
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virtual void handleError (int error) {
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ulSetError(UL_WARNING,"Network: %d: errno: %s(%d)",getHandle(),strerror(errno),errno);
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}
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static bool poll (unsigned int timeout = 0 ) ;
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static void loop (unsigned int timeout = 0 ) ;
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};
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#endif // NET_CHANNEL_H
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