Keith Winstein
85 lines
1.9 KiB
C++
85 lines
1.9 KiB
C++
#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 "network.hpp"
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using namespace std;
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namespace Network {
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class Instruction
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{
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public:
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uint64_t old_num, new_num;
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string diff;
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uint64_t ack_num;
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Instruction( uint64_t s_old_num, uint64_t s_new_num, string s_diff, uint64_t s_ack_num )
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: old_num( s_old_num ), new_num( s_new_num ), diff( s_diff ), ack_num( s_ack_num )
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{}
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string tostring( void ) { return ""; }
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};
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template <class State>
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class TimestampedState
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{
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public:
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uint64_t timestamp;
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uint64_t num;
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State state;
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TimestampedState( uint64_t s_timestamp, uint64_t s_num, State &s_state )
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: timestamp( s_timestamp ), num( s_num ), state( s_state )
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{}
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};
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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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static const int INITIAL_TIMEOUT = 1000; /* ms, same as TCP */
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static const int SEND_INTERVAL = 20; /* ms between frames */
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static const int HEADER_LEN = 40;
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/* helper methods for tick() */
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void update_assumed_receiver_state( void );
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void rationalize_states( void );
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void send_to_receiver( void );
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Connection connection;
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bool server;
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uint64_t timestamp( void );
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/* sender */
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MyState current_state;
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list< TimestampedState<MyState> > sent_states;
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/* first element: known, acknowledged receiver state */
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/* last element: last sent state */
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/* somewhere in the middle: the assumed state of the receiver */
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typename list< TimestampedState<MyState> >::iterator assumed_receiver_state;
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int timeout;
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/* simple receiver */
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uint64_t highest_state_received;
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public:
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Transport( MyState &initial_state );
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Transport( MyState &initial_state, const char *key_str, const char *ip, int port );
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void new_state( MyState &s );
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void tick( void );
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};
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}
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#endif
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