* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
+#include <sstream>
+#include <stdexcept>
+
+#include <boost/bind.hpp>
+
#include "server.hxx"
+#include "log.hxx"
namespace libt2n
{
-void connection::check_timeout()
+server_connection::server_connection(int _timeout)
+ : connection(), callbacks(__events_end)
+{
+ set_timeout(_timeout);
+ reset_timeout();
+ connection_id=0;
+ my_server=0;
+}
+
+server_connection::~server_connection()
+{
+ // we want the connection_closed callbacks to be called before
+ close();
+
+ do_callbacks(connection_deleted);
+}
+
+void server_connection::close()
+{
+ if (!is_closed())
+ {
+ connection::close();
+ do_callbacks(connection_closed);
+ }
+}
+
+/// get pointer to logging stream, returns NULL if no logging needed
+std::ostream* server_connection::get_logstream(log_level_values level)
+{
+ if (my_server != NULL)
+ {
+ std::ostream* ostr=my_server->get_logstream(level);
+ if (ostr != NULL)
+ (*ostr) << "connection " << get_id() << ": ";
+ return ostr;
+ }
+ else
+ return NULL;
+}
+
+/// check if timeout is expired, close connection if so
+void server_connection::check_timeout()
{
- if (timeout != -1 && last_action_time+timeout >= time(NULL))
+ if (timeout != -1 && last_action_time+timeout < time(NULL))
+ {
+ LOGSTREAM(debug,"timeout on connection " << connection_id << ", closing");
this->close();
+ }
}
-void connection::reset_timeout()
+/// reset the timeout, e.g. if something is received
+void server_connection::reset_timeout()
{
last_action_time=time(NULL);
}
-bool connection::get_packet(std::string& data, unsigned int& conn_id)
-{
- // max packet size is unsigned int
+/** @brief add a callback
- // no size information -> no packet
- if (buffer.size() < sizeof(unsigned int))
- return false;
+ @param event event the function will be called at
+ @param func functor (see boost function) that will be called
- unsigned int psize=*((unsigned int*)(buffer.data()));
+ @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 server_connection::add_callback(callback_event_type event, const boost::function<void ()>& func)
+{
+ if (event == new_connection)
+ throw std::logic_error("new_connection callback not allowed for server_connections");
- // enough data for one packet in buffer?
- if (buffer.size() < sizeof(unsigned int)+psize)
- return false;
+ callbacks[event].push_back(func);
+}
- data.assign(buffer,sizeof(unsigned int),psize);
- buffer.erase(0,sizeof(unsigned int)+psize);
+void server_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)();
+}
- return true;
+server::server()
+ : callbacks(__events_end)
+{
+ set_default_timeout(30);
+ set_logging(NULL,none);
+ next_id=1;
}
server::~server()
{
- std::map<unsigned int, connection*>::iterator ie=connections.end();
- for(std::map<unsigned int, connection*>::iterator i=connections.begin(); i != ie; i++)
+ std::map<unsigned int, server_connection*>::iterator ie=connections.end();
+ for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++)
delete i->second;
}
-connection* server::get_connection(unsigned int conn_id)
+/** @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 like this:
+ s.add_callback(new_connection,bind(&my_class::func_to_call_back, boost::ref(*this), _1));
+*/
+void server::add_callback(callback_event_type event, const boost::function<void (unsigned int)>& func)
+{
+ callbacks[event].push_back(func);
+
+ // add callback to all existing connections
+ if (event != new_connection)
+ {
+ std::map<unsigned int, server_connection*>::iterator ie=connections.end();
+ for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++)
+ i->second->add_callback(event,bind(func, i->first));
+ }
+}
+
+void server::do_callbacks(callback_event_type event, unsigned int conn_id)
+{
+ std::list<boost::function<void (unsigned int)> >::iterator i,ie=callbacks[event].end();
+ for (i=callbacks[event].begin(); i != ie; i++)
+ (*i)(conn_id);
+}
+
+int server::add_connection(server_connection* newconn)
{
- std::map<unsigned int, connection*>::iterator p=connections.find(conn_id);
+ unsigned int cid=next_id++;
+ newconn->set_id(cid);
+ newconn->set_server(this);
+ connections[cid]=newconn;
+
+ // add all callbacks
+ for(int e=connection_closed; e != __events_end; e++)
+ {
+ std::list<boost::function<void (unsigned int)> >::iterator i,ie=callbacks[e].end();
+ for (i=callbacks[e].begin(); i != ie; i++)
+ newconn->add_callback(static_cast<callback_event_type>(e),bind(*i,cid));
+ }
+
+ LOGSTREAM(debug,"new connection accepted, id: " << cid);
+
+ do_callbacks(new_connection,cid);
+
+ return cid;
+}
+
+/// activate logging to the given stream. everything above the given level is logged.
+void server::set_logging(std::ostream *_logstream, log_level_values _log_level)
+{
+ log_level=_log_level;
+ logstream=_logstream;
+}
+
+/**
+ @brief Gets a connection by id
+
+ @param conn_id Connection ID
+
+ @retval Pointer to connection object
+*/
+server_connection* server::get_connection(unsigned int conn_id)
+{
+ std::map<unsigned int, server_connection*>::iterator p=connections.find(conn_id);
if (p==connections.end())
return NULL;
else
return p->second;
}
-void server::check_timeout()
+/// check for timeouts, remove closed connections. don't forget to call this from time to time.
+void server::cleanup()
{
- std::map<unsigned int, connection*>::iterator ie=connections.end();
- for(std::map<unsigned int, connection*>::iterator i=connections.begin(); i != ie; i++)
+ std::map<unsigned int, server_connection*>::iterator ie=connections.end();
+ for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++)
i->second->check_timeout();
+
+ for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie;)
+ {
+ if (i->second->is_closed() && !i->second->packet_available())
+ {
+ // closed and no usable data in buffer -> remove
+ LOGSTREAM(debug,"removing conneciton " << i->first << " because it is closed and no more data waiting");
+
+ delete i->second;
+ connections.erase(i);
+ i=connections.begin();
+ ie=connections.end();
+ }
+ else
+ i++;
+ }
}
+/** @brief get a complete data packet from any client. The packet is removed from the
+ connection buffer.
+ @param[out] data the data package
+ @param[out] conn_id the connection id we got this packet from
+ @retval true if packet found
+*/
bool server::get_packet(std::string& data, unsigned int& conn_id)
{
// todo: this is somehow unfair: the first connections in the map get checked more
// often than the others and can thus block them out
- std::map<unsigned int, connection*>::iterator ie=connections.end();
- for(std::map<unsigned int, connection*>::iterator i=connections.begin(); i != ie; i++)
- if (i->second->get_packet(data,conn_id))
+ std::map<unsigned int, server_connection*>::iterator ie=connections.end();
+ for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++)
+ if (i->second->get_packet(data))
+ {
+ LOGSTREAM(debug,"got packet (" << data.size() << " bytes) from connection " << i->first);
+
+ conn_id=i->first;
return true;
+ }
+
+ return false;
}
-void server::log(log_level_values level, const char* message)
+/// get pointer to logging stream, returns NULL if no logging needed
+std::ostream* server::get_logstream(log_level_values level)
{
- if (logstream && level >= log_level)
- (*logstream) << message << std::endl;
+ if (logstream && log_level >= level)
+ return logstream;
+ else
+ return NULL;
}
-
};
git://developer.intra2net.com / libt2n / blobdiff