Split out sender behavior into new class

transportsender.hpp

@@ -0,0 +1,85 @@
+#ifndef TRANSPORT_SENDER_HPP
+#define TRANSPORT_SENDER_HPP
+
+#include <string>
+#include <list>
+
+#include "network.hpp"
+#include "transportinstruction.pb.h"
+#include "transportstate.hpp"
+
+using namespace std;
+using namespace TransportBuffers;
+
+namespace Network {
+  template <class MyState>
+  class TransportSender
+  {
+  private:
+    /* timing parameters */
+    static const int SEND_INTERVAL_MIN = 20; /* ms between frames */
+    static const int SEND_INTERVAL_MAX = 250; /* ms between frames */
+    static const int ACK_INTERVAL = 1000; /* ms between empty acks */
+    static const int ACK_DELAY = 10; /* ms before delayed ack */
+    static const int SEND_MINDELAY = 20; /* ms to collect all input */
+    static const int HEADER_LEN = 120;
+
+    /* helper methods for tick() */
+    unsigned int send_interval( void );
+    void update_assumed_receiver_state( void );
+    void rationalize_states( void );
+    void send_to_receiver( string diff );
+    void send_empty_ack( void );
+    void send_in_fragments( string diff, uint64_t new_num, bool send_timestamp = true );
+
+    /* state of sender */
+    Connection *connection;
+
+    MyState current_state;
+
+    list< TimestampedState<MyState> > sent_states;
+    /* first element: known, acknowledged receiver state */
+    /* last element: last sent state */
+
+    /* somewhere in the middle: the assumed state of the receiver */
+    typename list< TimestampedState<MyState> >::iterator assumed_receiver_state;
+
+    /* for fragment creation */
+    uint16_t next_instruction_id;
+    Instruction last_instruction_sent;
+
+    /* timing state */
+    uint64_t next_ack_time;
+    uint64_t next_send_time;
+
+    bool verbose;
+
+    /* information about receiver state */
+    uint64_t ack_num;
+
+  public:
+    /* constructor */
+    TransportSender( Connection *s_connection, MyState &initial_state );
+
+    /* Send data or an ack if necessary */
+    void tick( void );
+
+    /* Returns the number of ms to wait until next possible event. */
+    int wait_time( void );
+
+    /* executed upon receipt of ack */
+    void process_acknowledgment_through( uint64_t ack_num );
+
+    /* getters and setters */
+    MyState &get_current_state( void ) { return current_state; }
+    void set_current_state( const MyState &x ) { current_state = x; }
+    void set_verbose( void ) { verbose = true; }
+    void set_ack_num( uint64_t s_ack_num ) { ack_num = s_ack_num; }
+
+    /* nonexistent methods to satisfy -Weffc++ */
+    TransportSender( const TransportSender &x );
+    TransportSender & operator=( const TransportSender &x );
+  };
+}
+
+#endif