port-tunnel/TODO.md

TODO:

• listen and connect for UDP

  listener {
      mainsock = new UdpSocket(true)
      mainsock.bind(in_end)
  
      do {
          pac = mainsock.receiveAny(out sender_end)
      } while (pac is not ConnectionRequest) skip package
      connector_end = sender_end
      mainsock.sendTo(ConnectionConfirmation, connector_end)
  
      attemptN = 0
      while(attemptN < 20){
          try {
              pac = mainsock.receiveAny(out sender_end)
              if(sender_end == connector_end) {
                  connector_pac = new ConnectorPackage.parse(pac)
                  mainsock.sendTo(connector_pac.data, connector_pac.destination), 
              }
              else {
                  extern_pac = new ExternPackage(pac, sender_end)
                  mainsock.sendTo(extern_pac, connector_end)
              }
              attemptN = 0
          }
          catch { 
              attemptN++
              sleep(10ms)
          }
      }
      log("connector is unreachable")
  }
  
  connector {
      if(output_mode == bind) {
          mainsock = new UdpSocket(true)
          mainsock.bind(out_end)
      }
      else if(output_mode == send) {
          mainsock = new UdpSocket(false)
      }
      else throw
  
      attemptN = 0
      while(attemptN < 20) {
          try {
              pac = mainsock.receiveAny(out sender_end)
              if(sender_end == out_end) {
                  connector_pac = new ConnectorPackage(pac)
              }
              else {
                  extern_pac = ExternPackage.parse(pac)
                  mainsock.sendTo(extern_pac.data, out_end)
              }
              attemptN = 0
          }
          catch { 
              attemptN++
              sleep(10ms)
          }
      }
      log("connector is unreachable")
  }
  
  

• listen and connect for TCP

• encrypt/decrypt input/output

  • generate temp password from key every 10 minutes:

    rng(seed: time()/(10*60*CLOCKS_PER_SECOND), salt: hash(key))