Function HttpConnectTcp4

NetworkPkg/HttpDxe/HttpProto.c:1210–1289

Check existing TCP connection, if in error state, recover TCP4 connection. Then, connect one TLS session if required. @param[in] HttpInstance The HTTP instance private data. @retval EFI_SUCCESS The TCP connection is established. @retval EFI_NOT_READY TCP4 protocol child is not created or configured. @retval Others Other error as indicat

**/
EFI_STATUS
HttpConnectTcp4 (
  IN  HTTP_PROTOCOL        *HttpInstance
  )
{
  EFI_STATUS                Status;
  EFI_TCP4_CONNECTION_STATE Tcp4State;


  if (HttpInstance->State < HTTP_STATE_TCP_CONFIGED || HttpInstance->Tcp4 == NULL) {
    return EFI_NOT_READY;
  }

  Status = HttpInstance->Tcp4->GetModeData(
                                 HttpInstance->Tcp4,
                                 &Tcp4State,
                                 NULL,
                                 NULL,
                                 NULL,
                                 NULL
                                 );
  if (EFI_ERROR(Status)){
    DEBUG ((EFI_D_ERROR, "Tcp4 GetModeData fail - %x\n", Status));
    return Status;
  }

  if (Tcp4State == Tcp4StateEstablished) {
    return EFI_SUCCESS;
  } else if (Tcp4State > Tcp4StateEstablished ) {
    HttpCloseConnection(HttpInstance);
  }

  Status = HttpCreateConnection (HttpInstance);
  if (EFI_ERROR(Status)){
    DEBUG ((EFI_D_ERROR, "Tcp4 Connection fail - %x\n", Status));
    return Status;
  }

  //
  // Tls session connection.
  //
  if (HttpInstance->UseHttps) {
    if (HttpInstance->TimeoutEvent == NULL) {
      //
      // Create TimeoutEvent for TLS connection.
      //
      Status = gBS->CreateEvent (
                      EVT_TIMER,
                      TPL_CALLBACK,
                      NULL,
                      NULL,
                      &HttpInstance->TimeoutEvent
                      );
      if (EFI_ERROR (Status)) {
        TlsCloseTxRxEvent (HttpInstance);
        return Status;
      }
    }