X-Git-Url: http://developer.intra2net.com/git/?p=libt2n;a=blobdiff_plain;f=src%2Fserver.cpp;h=7b306e15fe44e71cf49d61ecf7b1f1f80a385a35;hp=b749afa221d536f8be555ccfbaaa87dd8fe9ef0c;hb=e1d0794d7ab00e08ee6c0ed9e6d82afcdf415a84;hpb=ac7fdc22899c0c493fda5fdb3a4cb67e77504a6b diff --git a/src/server.cpp b/src/server.cpp index b749afa..7b306e1 100644 --- a/src/server.cpp +++ b/src/server.cpp @@ -17,80 +17,239 @@ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * ***************************************************************************/ +#include +#include + +#include + #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& 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 >::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::iterator ie=connections.end(); - for(std::map::iterator i=connections.begin(); i != ie; i++) + std::map::iterator ie=connections.end(); + for(std::map::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& func) +{ + callbacks[event].push_back(func); + + // add callback to all existing connections + if (event != new_connection) + { + std::map::iterator ie=connections.end(); + for(std::map::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 >::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::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 >::iterator i,ie=callbacks[e].end(); + for (i=callbacks[e].begin(); i != ie; i++) + newconn->add_callback(static_cast(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::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::iterator ie=connections.end(); - for(std::map::iterator i=connections.begin(); i != ie; i++) + std::map::iterator ie=connections.end(); + for(std::map::iterator i=connections.begin(); i != ie; i++) i->second->check_timeout(); + + for(std::map::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::iterator ie=connections.end(); - for(std::map::iterator i=connections.begin(); i != ie; i++) - if (i->second->get_packet(data,conn_id)) + std::map::iterator ie=connections.end(); + for(std::map::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; } - };