tcp_state.hh

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#ifndef SPONGE_LIBSPONGE_TCP_STATE
#define SPONGE_LIBSPONGE_TCP_STATE
 
#include "tcp_receiver.hh"
#include "tcp_sender.hh"
 
#include <string>
 
class TCPState {
  private:
    std::string _sender{};
    std::string _receiver{};
    bool _active{true};
    bool _linger_after_streams_finish{true};
 
  public:
    bool operator==(const TCPState &other) const;
    bool operator!=(const TCPState &other) const;
 
    enum class State {
        LISTEN = 0,   
        SYN_RCVD,     
        SYN_SENT,     
        ESTABLISHED,  
        CLOSE_WAIT,   
        LAST_ACK,     
        FIN_WAIT_1,   
        FIN_WAIT_2,   
        CLOSING,      
        TIME_WAIT,    
        CLOSED,       
        RESET,        
    };
 
    std::string name() const;
 
    TCPState(const TCPSender &sender, const TCPReceiver &receiver, const bool active, const bool linger);
 
    TCPState(const TCPState::State state);
 
    static std::string state_summary(const TCPReceiver &receiver);
 
    static std::string state_summary(const TCPSender &receiver);
};
 
namespace TCPReceiverStateSummary {
const std::string ERROR = "error (connection was reset)";
const std::string LISTEN = "waiting for SYN: ackno is empty";
const std::string SYN_RECV = "SYN received (ackno exists), and input to stream hasn't ended";
const std::string FIN_RECV = "input to stream has ended";
}  // namespace TCPReceiverStateSummary
 
namespace TCPSenderStateSummary {
const std::string ERROR = "error (connection was reset)";
const std::string CLOSED = "waiting for stream to begin (no SYN sent)";
const std::string SYN_SENT = "stream started but nothing acknowledged";
const std::string SYN_ACKED = "stream ongoing";
const std::string FIN_SENT = "stream finished (FIN sent) but not fully acknowledged";
const std::string FIN_ACKED = "stream finished and fully acknowledged";
}  // namespace TCPSenderStateSummary
 
#endif  // SPONGE_LIBSPONGE_TCP_STATE