-/***************************************************************************
- * Copyright (C) 2006 by Gerd v. Egidy *
- * gve@intra2net.com *
- * *
- * This library is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU Lesser General Public License version *
- * 2.1 as published by the Free Software Foundation. *
- * *
- * This library is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU Lesser General Public License for more details. *
- * *
- * You should have received a copy of the GNU Lesser General Public *
- * License along with this program; if not, write to the *
- * Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
- ***************************************************************************/
+/*
+Copyright (C) 2006 by Intra2net AG - Gerd v. Egidy
+
+The software in this package is distributed under the GNU General
+Public License version 2 (with a special exception described below).
+
+A copy of GNU General Public License (GPL) is included in this distribution,
+in the file COPYING.GPL.
+
+As a special exception, if other files instantiate templates or use macros
+or inline functions from this file, or you compile this file and link it
+with other works to produce a work based on this file, this file
+does not by itself cause the resulting work to be covered
+by the GNU General Public License.
+
+However the source code for this file must still be made available
+in accordance with section (3) of the GNU General Public License.
+
+This exception does not invalidate any other reasons why a work based
+on this file might be covered by the GNU General Public License.
+*/
#include <string>
#include <sstream>
#include <iostream>
+#include <stdexcept>
#include <netinet/in.h>
namespace libt2n
{
+connection::~connection()
+{
+ // Run close() manually since it's a virtual function
+ // and we are in the destructor.
+ if (!is_closed())
+ {
+ closed=true;
+ do_callbacks(connection_closed);
+ }
+
+ do_callbacks(connection_deleted);
+}
+
+void connection::close()
+{
+ if (!is_closed())
+ {
+ closed=true;
+ do_callbacks(connection_closed);
+ }
+}
+
+/// get the number of bytes being available as next complete packet
connection::packet_size_indicator connection::bytes_available()
{
// no size information -> no packet
return psize;
}
+/// remove all data from buffer that is not a complete packet
+void connection::remove_incomplete_packets()
+{
+ std::string::size_type p=0;
+ std::string::size_type end=buffer.size();
+
+ while (p < end)
+ {
+ // not enough space for size information -> no packet
+ if (p+sizeof(packet_size_indicator) > end)
+ break;
+
+ packet_size_indicator psize=ntohl(*((packet_size_indicator*)(buffer.data()+p)));
+
+ if (p+sizeof(packet_size_indicator)+psize > end)
+ {
+ // incomplete packet
+ break;
+ }
+ else
+ {
+ // move p to where the next packet will start
+ p+=sizeof(packet_size_indicator)+psize;
+ }
+ }
+
+ if (p < end)
+ {
+ // incomplete packets there, remove them
+ buffer.erase(p);
+ }
+}
+
/// send a blob to the peer
void connection::write(const std::string& data)
{
real_write(send_data);
}
+/** @brief add a callback
+
+ @param event event the function will be called at
+ @param func functor (see boost function) that will be called
+
+ @note use boost::bind to bind to member functions and parameters like this:
+ 17 is a fixed parameter that is always added to the call
+ c.add_callback(connection_closed,bind(&my_class::func_to_call_back, boost::ref(*this), 17));
+*/
+void connection::add_callback(callback_event_type event, const boost::function<void ()>& func)
+{
+ callbacks[event].push_back(func);
+}
+
+/** @brief an event has occurred, execute the callbacks that are registered for this event
+
+ @param event event type that has occurred
+*/
+void connection::do_callbacks(callback_event_type event)
+{
+ std::list<boost::function<void ()> >::iterator i,ie=callbacks[event].end();
+ for (i=callbacks[event].begin(); i != ie; i++)
+ (*i)();
+}
+
+/** @brief get the callbacks in place for one event
+
+ @param event event the callbacks should be registered for
+ @return std::list of functors (boost::function) with the callbacks
+
+ @note if you want to get the callbacks for all events, loop from 0 to __events_end
+*/
+std::list<boost::function<void ()> > connection::get_callback_list(callback_event_type event)
+{
+ return callbacks[event];
+}
+
+/** @brief reopen a already closed connection, removes incomplete packets from the buffer
+
+ @note Only call when the connection is closed.
+
+ @note Justs cares about the data of connection, reconnecting has to be
+ done in a derived class.
+*/
+void connection::reopen()
+{
+ if (!is_closed())
+ throw std::logic_error("connection::reopen() called with connection still open");
+
+ closed=false;
+
+ // incomplete buffer data is worthless with a new connection
+ remove_incomplete_packets();
+
+ do_callbacks(new_connection);
+}
+
}
git://developer.intra2net.com / libt2n / blobdiff