text: // Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
  // All rights reserved.
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are met:
  // * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  // * Redistributions in binary form must reproduce the above copyright
  // notice, this list of conditions and the following disclaimer in the
  // documentation and/or other materials provided with the distribution.
  // * Neither the name of the Andrey N. Sabelnikov nor the
  // names of its contributors may be used to endorse or promote products
  // derived from this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER  BE LIABLE FOR ANY
  // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  // ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  //
  
  
  
  
  //------------------------------------------------------------------------------
  //------------------------------------------------------------------------------
  #include "string_tools.h"
  
  #undef DUCOV2_DEFAULT_LOG_CATEGORY
  #define DUCOV2_DEFAULT_LOG_CATEGORY "net"
  
  namespace epee
  {
  namespace levin
  {
  inline
  bool levin_client_impl::connect(u_long ip, int port, unsigned int timeout, const std::string& bind_ip)
  {
  	return m_transport.connect(string_tools::get_ip_string_from_int32(ip), port, timeout, timeout, bind_ip);
  }
  //------------------------------------------------------------------------------
  inline
  bool levin_client_impl::connect(const std::string& addr, int port, unsigned int timeout, const std::string& bind_ip)
  {
  	return m_transport.connect(addr, port, timeout, timeout, bind_ip);
  }
  //------------------------------------------------------------------------------
  inline
  bool levin_client_impl::is_connected()
  {
  	return m_transport.is_connected();
  }
  //------------------------------------------------------------------------------
  inline
  bool levin_client_impl::disconnect()
  {
  	return m_transport.disconnect();
  }
  //------------------------------------------------------------------------------
  inline
  levin_client_impl::levin_client_impl()
  {
  }
  //------------------------------------------------------------------------------
  inline
  levin_client_impl::~levin_client_impl()
  {
  	disconnect();
  }
  //------------------------------------------------------------------------------
  inline
  int levin_client_impl::invoke(int command, const epee::span<const uint8_t> in_buff, std::string& buff_out)
  {
  	if(!is_connected())
  		return -1;
  
  	bucket_head head = {0};
  	head.m_signature = SWAP64LE(LEVIN_SIGNATURE);
  	head.m_cb = SWAP64LE(in_buff.size());
  	head.m_have_to_return_data = true;
  	head.m_command = SWAP32LE(command);
  	if(!m_transport.send(&head, sizeof(head)))
  		return -1;
  
  	if(!m_transport.send(in_buff))
  		return -1;
  
  	std::string local_buff;
  	if(!m_transport.recv_n(local_buff, sizeof(bucket_head)))
  		return -1;
  
  	head = *(bucket_head*)local_buff.data();
  
  
  	if(head.m_signature!=SWAP64LE(LEVIN_SIGNATURE))
  	{
  		LOG_PRINT_L1("Signature mismatch in response");
  		return -1;
  	}
  
  	if(!m_transport.recv_n(buff_out, head.m_cb))
  		return -1;
  
  	return head.m_return_code;
  }
  //------------------------------------------------------------------------------
  inline
  int levin_client_impl::notify(int command, const std::string& in_buff)
  {
  	if(!is_connected())
  		return -1;
  
  	bucket_head head = {0};
  	head.m_signature = SWAP64LE(LEVIN_SIGNATURE);
  	head.m_cb = SWAP64LE(in_buff.size());
  	head.m_have_to_return_data = false;
  	head.m_command = SWAP32LE(command);
  
  	if(!m_transport.send((const char*)&head, sizeof(head)))
  		return -1;
  
  	if(!m_transport.send(in_buff))
  		return -1;
  
  	return 1;
  }
  
  //------------------------------------------------------------------------------
  //------------------------------------------------------------------------------
  inline
    int levin_client_impl2::invoke(int command, const epee::span<const uint8_t> in_buff, std::string& buff_out)
  {
    if(!is_connected())
      return -1;
  
    bucket_head2 head = {0};
  	head.m_signature = SWAP64LE(LEVIN_SIGNATURE);
    head.m_cb = SWAP64LE(in_buff.size());
    head.m_have_to_return_data = true;
  	head.m_command = SWAP32LE(command);
    head.m_return_code = SWAP32LE(0);
    head.m_flags = SWAP32LE(LEVIN_PACKET_REQUEST);
    head.m_protocol_version = SWAP32LE(LEVIN_PROTOCOL_VER_1);
    if(!m_transport.send(&head, sizeof(head)))
      return -1;
  
    if(!m_transport.send(in_buff))
      return -1;
  
    std::string local_buff;
    if(!m_transport.recv_n(local_buff, sizeof(bucket_head2)))
      return -1;
  
    head = *(bucket_head2*)local_buff.data();
  
    if(head.m_signature != SWAP64LE(LEVIN_SIGNATURE))
    {
      LOG_PRINT_L1("Signature mismatch in response");
      return -1;
    }
  
    if(!m_transport.recv_n(buff_out, SWAP64LE(head.m_cb)))
      return -1;
  
    return head.m_return_code;
  }
  //------------------------------------------------------------------------------
  inline
    int levin_client_impl2::notify(int command, const std::string& in_buff)
  {
    if(!is_connected())
      return -1;
  
    bucket_head2 head = {0};
  	head.m_signature = SWAP64LE(LEVIN_SIGNATURE);
    head.m_cb = SWAP64LE(in_buff.size());
    head.m_have_to_return_data = false;
  	head.m_command = SWAP32LE(command);
    head.m_return_code = SWAP32LE(0);
    head.m_flags = SWAP32LE(LEVIN_PACKET_REQUEST);
    head.m_protocol_version = SWAP32LE(LEVIN_PROTOCOL_VER_1);
  
    if(!m_transport.send((const char*)&head, sizeof(head)))
      return -1;
  
    if(!m_transport.send(in_buff))
      return -1;
  
    return 1;
  }
  
  }
  }
  //------------------------------------------------------------------------------
  