src/surf/ns3/ns3_simulator.cc

   1 /* Copyright (c) 2007-2016. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include "src/surf/ns3/ns3_simulator.h"
   8 #include "xbt/dict.h"
   9 #include "xbt/log.h"
  10 #include "xbt/sysdep.h"
  11
  12 static void delete_mysocket(void* p)
  13 {
  14   delete (SgFlow*)p;
  15 }
  16 xbt_dict_t flowFromSock = xbt_dict_new_homogeneous(delete_mysocket);
  17 ; // ns3::sock -> SgFlow
  18
  19 static void receive_callback(ns3::Ptr<ns3::Socket> socket);
  20 static void send_callback(ns3::Ptr<ns3::Socket> sock, uint32_t txSpace);
  21 static void datasent_callback(ns3::Ptr<ns3::Socket> socket, uint32_t dataSent);
  22
  23 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(ns3);
  24
  25 SgFlow::SgFlow(uint32_t totalBytes, simgrid::surf::NetworkNS3Action* action)
  26 {
  27   totalBytes_ = totalBytes;
  28   remaining_  = totalBytes;
  29   action_     = action;
  30 }
  31
  32 static SgFlow* getFlowFromSocket(ns3::Ptr<ns3::Socket> socket)
  33 {
  34   return (SgFlow*)xbt_dict_get_or_null(flowFromSock, transformSocketPtr(socket));
  35 }
  36
  37 static void receive_callback(ns3::Ptr<ns3::Socket> socket)
  38 {
  39   SgFlow* flow = getFlowFromSocket(socket);
  40
  41   if (flow->finished_ == false) {
  42     flow->finished_ = true;
  43     XBT_DEBUG("recv_cb of F[%p, %p, %d]", flow, flow->action_, flow->totalBytes_);
  44     XBT_DEBUG("Stop simulator at %f seconds", ns3::Simulator::Now().GetSeconds());
  45     ns3::Simulator::Stop(ns3::Seconds(0.0));
  46     ns3::Simulator::Run();
  47   }
  48 }
  49
  50 static void send_callback(ns3::Ptr<ns3::Socket> sock, uint32_t txSpace)
  51 {
  52   SgFlow* flow = getFlowFromSocket(sock);
  53
  54   if (flow->remaining_ == 0) // all data was already buffered (and socket was already closed)
  55     return;
  56
  57   uint8_t* data = (uint8_t*)malloc(sizeof(uint8_t) * txSpace);
  58
  59   while (flow->bufferedBytes_ < flow->totalBytes_ && sock->GetTxAvailable() > 0) {
  60
  61     uint32_t toWrite = std::min({flow->remaining_, txSpace, sock->GetTxAvailable()});
  62     int amountSent   = sock->Send(data, toWrite, 0);
  63
  64     if (amountSent < 0)
  65       return;
  66     flow->bufferedBytes_ += amountSent;
  67     flow->remaining_ -= amountSent;
  68
  69     XBT_DEBUG("send_cb of F[%p, %p, %d] (%d/%d) %d buffered", flow, flow->action_, flow->totalBytes_, flow->remaining_,
  70               flow->totalBytes_, amountSent);
  71   }
  72   free(data);
  73
  74   if ((flow->bufferedBytes_) >= flow->totalBytes_)
  75     sock->Close();
  76 }
  77
  78 static void datasent_callback(ns3::Ptr<ns3::Socket> socket, uint32_t dataSent)
  79 {
  80   SgFlow* flow = getFlowFromSocket(socket);
  81   flow->sentBytes_ += dataSent;
  82   XBT_DEBUG("datasent_cb of F[%p, %p, %d] %d sent", flow, flow->action_, flow->totalBytes_, dataSent);
  83 }
  84
  85 static void normalClose_callback(ns3::Ptr<ns3::Socket> socket)
  86 {
  87   SgFlow* flow = getFlowFromSocket(socket);
  88   XBT_DEBUG("normalClose_cb of F[%p, %p, %d]", flow, flow->action_, flow->totalBytes_);
  89   receive_callback(socket);
  90 }
  91
  92 static void errorClose_callback(ns3::Ptr<ns3::Socket> socket)
  93 {
  94   SgFlow* flow = getFlowFromSocket(socket);
  95   XBT_DEBUG("errorClose_cb of F[%p, %p, %d]", flow, flow->action_, flow->totalBytes_);
  96   xbt_die("NS3: a socket was closed anormally");
  97 }
  98
  99 static void succeededConnect_callback(ns3::Ptr<ns3::Socket> socket)
 100 {
 101   SgFlow* flow = getFlowFromSocket(socket);
 102   XBT_DEBUG("succeededConnect_cb of F[%p, %p, %d]", flow, flow->action_, flow->totalBytes_);
 103 }
 104
 105 static void failedConnect_callback(ns3::Ptr<ns3::Socket> socket)
 106 {
 107   SgFlow* mysocket = getFlowFromSocket(socket);
 108   XBT_DEBUG("failedConnect_cb of F[%p, %p, %d]", mysocket, mysocket->action_, mysocket->totalBytes_);
 109   xbt_die("NS3: a socket failed to connect");
 110 }
 111
 112 void StartFlow(ns3::Ptr<ns3::Socket> sock, const char* to, uint16_t port_number)
 113 {
 114   ns3::InetSocketAddress serverAddr(to, port_number);
 115
 116   sock->Connect(serverAddr);
 117   sock->SetSendCallback(MakeCallback(&send_callback));
 118   sock->SetRecvCallback(MakeCallback(&receive_callback));
 119   sock->SetDataSentCallback(MakeCallback(&datasent_callback));
 120   sock->SetConnectCallback(MakeCallback(&succeededConnect_callback), MakeCallback(&failedConnect_callback));
 121   sock->SetCloseCallbacks(MakeCallback(&normalClose_callback), MakeCallback(&errorClose_callback));
 122
 123   SgFlow* flow = getFlowFromSocket(sock);
 124   XBT_DEBUG("startFlow_cb of F[%p, %p, %d] dest=%s port=%d", flow, flow->action_, flow->totalBytes_, to, port_number);
 125 }