UDPForwarder.cc

   1 // $Id$
   2 //
   3 // Copyright (C) 2008
   4
   5 /** \file
   6     \brief UDPForwarder non-inline non-template implementation */
   7
   8 #include "UDPForwarder.hh"
   9 //#include "UDPForwarder.ih"
  10
  11 // Custom includes
  12
  13 //#include "UDPForwarder.mpp"
  14 #define prefix_
  15 ///////////////////////////////cc.p////////////////////////////////////////
  16
  17 prefix_ udpforward::UDPForwarder::UDPForwarder(senf::INet4SocketAddress const & addr,
  18                                                senf::INet4SocketAddress const & target)
  19     :  socket_ (addr), target_(target), peer_ (),
  20        event_ ("UDPForwarder::read", senf::membind(&UDPForwarder::readEvent, this),
  21                socket_, senf::scheduler::FdEvent::EV_READ)
  22 {
  23     SENF_LOG(("Input socket opened at " << addr << ". Forwarding to " << target));
  24 }
  25
  26 prefix_ void udpforward::UDPForwarder::readEvent(int event)
  27 {
  28     if (event != senf::scheduler::FdEvent::EV_READ)
  29         throw ForwarderException("Unexpected remote socket read failure");
  30
  31     std::string packet;
  32     senf::INet4SocketAddress addr;
  33     socket_.readfrom(packet, addr, 0);
  34
  35     if (addr == target_) {
  36         if (! peer_)
  37             SENF_LOG((senf::log::MESSAGE)("Return packet dropped (no peer)"));
  38         else {
  39             SENF_LOG((senf::log::VERBOSE)("Return packet to " << peer_));
  40             socket_.writeto(peer_, packet);
  41         }
  42         return;
  43     }
  44
  45     if (addr != peer_) {
  46         SENF_LOG((senf::log::NOTICE)("Peer address changed from " << peer_ << " to " << addr));
  47         peer_ = addr;
  48     }
  49     socket_.writeto(target_, packet);
  50     SENF_LOG((senf::log::VERBOSE)("Forward packet from " << peer_));
  51 }
  52
  53 ///////////////////////////////cc.e////////////////////////////////////////
  54 #undef prefix_
  55 //#include "UDPForwarder.mpp"
  56
  57 \f
  58 // Local Variables:
  59 // mode: c++
  60 // fill-column: 100
  61 // indent-tabs-mode: nil
  62 // compile-command: "scons"
  63 // comment-column: 40
  64 // End: