Keith Winstein
125 lines
4.8 KiB
C++
125 lines
4.8 KiB
C++
/*
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Mosh: the mobile shell
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Copyright 2012 Keith Winstein
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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In addition, as a special exception, the copyright holders give
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permission to link the code of portions of this program with the
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OpenSSL library under certain conditions as described in each
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individual source file, and distribute linked combinations including
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the two.
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You must obey the GNU General Public License in all respects for all
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of the code used other than OpenSSL. If you modify file(s) with this
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exception, you may extend this exception to your version of the
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file(s), but you are not obligated to do so. If you do not wish to do
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so, delete this exception statement from your version. If you delete
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this exception statement from all source files in the program, then
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also delete it here.
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*/
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#ifndef NETWORK_TRANSPORT_HPP
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#define NETWORK_TRANSPORT_HPP
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#include <string>
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#include <signal.h>
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#include <time.h>
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#include <list>
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#include <vector>
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#include "network.h"
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#include "transportsender.h"
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#include "transportfragment.h"
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namespace Network {
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template <class MyState, class RemoteState>
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class Transport
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{
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private:
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/* the underlying, encrypted network connection */
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Connection connection;
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/* sender side */
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TransportSender<MyState> sender;
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/* helper methods for recv() */
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void process_throwaway_until( uint64_t throwaway_num );
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/* simple receiver */
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list< TimestampedState<RemoteState> > received_states;
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RemoteState last_receiver_state; /* the state we were in when user last queried state */
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FragmentAssembly fragments;
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bool verbose;
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public:
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Transport( MyState &initial_state, RemoteState &initial_remote,
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const char *desired_ip, const char *desired_port );
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Transport( MyState &initial_state, RemoteState &initial_remote,
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const char *key_str, const char *ip, int port );
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/* Send data or an ack if necessary. */
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void tick( void ) { sender.tick(); }
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/* Returns the number of ms to wait until next possible event. */
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int wait_time( void ) { return sender.wait_time(); }
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/* Blocks waiting for a packet. */
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void recv( void );
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/* Find diff between last receiver state and current remote state, then rationalize states. */
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string get_remote_diff( void );
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/* Shut down other side of connection. */
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/* Illegal to change current_state after this. */
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void start_shutdown( void ) { sender.start_shutdown(); }
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bool shutdown_in_progress( void ) const { return sender.get_shutdown_in_progress(); }
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bool shutdown_acknowledged( void ) const { return sender.get_shutdown_acknowledged(); }
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bool shutdown_ack_timed_out( void ) const { return sender.shutdown_ack_timed_out(); }
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bool has_remote_addr( void ) const { return connection.get_has_remote_addr(); }
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/* Other side has requested shutdown and we have sent one ACK */
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bool counterparty_shutdown_ack_sent( void ) const { return sender.get_counterparty_shutdown_acknowledged(); }
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int port( void ) const { return connection.port(); }
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string get_key( void ) const { return connection.get_key(); }
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MyState &get_current_state( void ) { return sender.get_current_state(); }
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void set_current_state( const MyState &x ) { sender.set_current_state( x ); }
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uint64_t get_remote_state_num( void ) const { return received_states.back().num; }
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const TimestampedState<RemoteState> & get_latest_remote_state( void ) const { return received_states.back(); }
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int fd( void ) const { return connection.fd(); }
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void set_verbose( void ) { sender.set_verbose(); verbose = true; }
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void set_send_delay( int new_delay ) { sender.set_send_delay( new_delay ); }
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uint64_t get_sent_state_acked_timestamp( void ) const { return sender.get_sent_state_acked_timestamp(); }
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uint64_t get_sent_state_acked( void ) const { return sender.get_sent_state_acked(); }
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uint64_t get_sent_state_last( void ) const { return sender.get_sent_state_last(); }
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unsigned int send_interval( void ) const { return sender.send_interval(); }
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const struct in_addr & get_remote_ip( void ) const { return connection.get_remote_ip(); }
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const NetworkException *get_send_exception( void ) const { return connection.get_send_exception(); }
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};
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}
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#endif
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