text: // datagram_socket.cpp
  //
  // --------------------------------------------------------------------------
  // This file is part of the "sockpp" C++ socket library.
  //
  // Copyright (c) 2014-2017 Frank Pagliughi
  // All rights reserved.
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  // 1. Redistributions of source code must retain the above copyright notice,
  // this list of conditions and the following disclaimer.
  //
  // 2. 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.
  //
  // 3. Neither the name of the copyright holder 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 HOLDER OR
  // CONTRIBUTORS 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 "sockpp/datagram_socket.h"
  #include "sockpp/exception.h"
  #include <algorithm>
  
  using namespace std::chrono;
  
  namespace sockpp {
  
  /////////////////////////////////////////////////////////////////////////////
  //								udp_socket
  /////////////////////////////////////////////////////////////////////////////
  
  /*
  datagram_socket::datagram_socket(in_port_t port) : socket(create())
  {
  	if (check_ret_bool(handle()))
  		bind(sock_address(port));
  }
  */
  
  datagram_socket::datagram_socket(const sock_address& addr)
  {
  	auto domain = addr.family();
  	if (domain == AF_UNSPEC) {
  		// TODO: Set last error for "address unspecified"
  		return /*false*/;
  	}
  
  	socket_t h = create(domain);
  	if (!check_ret_bool(h))
  		return /*false*/;
  
  	reset(h);
  	bind(addr);
  }
  
  // Opens a UDP socket. If it was already open, it just succeeds without
  // doing anything.
  
  #if 0
  int datagram_socket::open()
  {
  	if (!is_open())
  		reset(create());
  
  	return is_open() ? 0 : -1;
  }
  #endif
  
  ssize_t datagram_socket::recv_from(void* buf, size_t n, int flags,
  								   sock_address* srcAddr /*=nullptr*/)
  {
  	sockaddr* p = srcAddr ? srcAddr->sockaddr_ptr() : nullptr;
      socklen_t len = srcAddr ? srcAddr->size() : 0;
  
  	// TODO: Check returned length
      #if defined(_WIN32)
          return check_ret(::recvfrom(handle(), reinterpret_cast<char*>(buf),
                                      int(n), flags, p, &len));
      #else
          return check_ret(::recvfrom(handle(), buf, n, flags, p, &len));
      #endif
  }
  
  /////////////////////////////////////////////////////////////////////////////
  // End namespace sockpp
  }
  
  