1 /* Copyright (c) 2007-2019. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "src/surf/ns3/ns3_simulator.hpp"
8 #include "xbt/sysdep.h"
10 #include <ns3/ipv4-address-helper.h>
11 #include <ns3/point-to-point-helper.h>
12 #include <ns3/application-container.h>
14 #include <ns3/callback.h>
15 #include <ns3/packet-sink.h>
19 std::map<std::string, SgFlow*> flow_from_sock; // ns3::sock -> SgFlow
20 std::map<std::string, ns3::ApplicationContainer> sink_from_sock; // ns3::sock -> ns3::PacketSink
22 static void receive_callback(ns3::Ptr<ns3::Socket> socket);
23 static void datasent_cb(ns3::Ptr<ns3::Socket> socket, uint32_t dataSent);
25 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(ns3);
27 SgFlow::SgFlow(uint32_t totalBytes, simgrid::kernel::resource::NetworkNS3Action* action)
29 total_bytes_ = totalBytes;
30 remaining_ = totalBytes;
34 static SgFlow* getFlowFromSocket(ns3::Ptr<ns3::Socket> socket)
36 auto it = flow_from_sock.find(transform_socket_ptr(socket));
37 return (it == flow_from_sock.end()) ? nullptr : it->second;
40 static ns3::ApplicationContainer* getSinkFromSocket(ns3::Ptr<ns3::Socket> socket)
42 auto it = sink_from_sock.find(transform_socket_ptr(socket));
43 return (it == sink_from_sock.end()) ? nullptr : &(it->second);
46 static void receive_callback(ns3::Ptr<ns3::Socket> socket)
48 SgFlow* flow = getFlowFromSocket(socket);
49 XBT_DEBUG("received on F[%p, total: %u, remain: %u]", flow, flow->total_bytes_, flow->remaining_);
51 if (flow->finished_ == false) {
52 flow->finished_ = true;
53 XBT_DEBUG("recv_cb of F[%p, %p, %u]", flow, flow->action_, flow->total_bytes_);
54 XBT_DEBUG("Stop simulator at %f seconds", ns3::Simulator::Now().GetSeconds());
55 ns3::Simulator::Stop(ns3::Seconds(0.0));
56 ns3::Simulator::Run();
60 static void send_cb(ns3::Ptr<ns3::Socket> sock, uint32_t txSpace)
62 SgFlow* flow = getFlowFromSocket(sock);
63 ns3::ApplicationContainer* sink = getSinkFromSocket(sock);
64 XBT_DEBUG("Asked to write on F[%p, total: %u, remain: %u]", flow, flow->total_bytes_, flow->remaining_);
66 if (flow->remaining_ == 0) // all data was already buffered (and socket was already closed)
69 /* While not all is buffered and there remain space in the buffers */
70 while (flow->buffered_bytes_ < flow->total_bytes_ && sock->GetTxAvailable() > 0) {
72 // Send at most 1040 bytes (data size in a TCP packet), as ns-3 seems to not split correctly by itself
73 uint32_t toWrite = std::min({flow->remaining_, sock->GetTxAvailable(), std::uint32_t(1040)});
74 if (toWrite == 0) { // buffer full
75 XBT_DEBUG("%f: buffer full on flow %p (still %u to go)", ns3::Simulator::Now().GetSeconds(), flow,
79 int amountSent = sock->Send(0, toWrite, 0);
81 xbt_assert(amountSent > 0, "Since TxAvailable>0, amountSent should also >0");
82 flow->buffered_bytes_ += amountSent;
83 flow->remaining_ -= amountSent;
85 XBT_DEBUG("%f: sent %d bytes over flow %p (still %u to go)", ns3::Simulator::Now().GetSeconds(), amountSent, flow,
89 if (flow->buffered_bytes_ >= flow->total_bytes_){
90 XBT_DEBUG("Closing Sockets of flow %p", flow);
91 // Closing the sockets of the receiving application
92 ns3::Ptr<ns3::PacketSink> app = ns3::DynamicCast<ns3::PacketSink, ns3::Application>(sink->Get(0));
93 ns3::Ptr<ns3::Socket> listening_sock = app->GetListeningSocket();
94 listening_sock->Close();
95 listening_sock->SetRecvCallback(ns3::MakeNullCallback<void, ns3::Ptr<ns3::Socket>>());
96 for(ns3::Ptr<ns3::Socket> accepted_sock : app->GetAcceptedSockets())
97 accepted_sock->Close();
98 // Closing the socket of the sender
103 static void datasent_cb(ns3::Ptr<ns3::Socket> socket, uint32_t dataSent)
105 /* The tracing wants to know */
106 SgFlow* flow = getFlowFromSocket(socket);
107 flow->sent_bytes_ += dataSent;
108 XBT_DEBUG("datasent_cb of F[%p, %p, %u] %u sent (%u total)", flow, flow->action_, flow->total_bytes_, dataSent,
112 static void normalClose_callback(ns3::Ptr<ns3::Socket> socket)
114 SgFlow* flow = getFlowFromSocket(socket);
115 XBT_DEBUG("normalClose_cb of F[%p, %p] total: %u; sent: %u", flow, flow->action_, flow->total_bytes_,
117 // xbt_assert(flow->total_bytes_ == flow->sent_bytes_,
118 // "total_bytes (=%u) is not sent_bytes(=%u)", flow->total_bytes_ , flow->sent_bytes_);
119 // xbt_assert(flow->remaining_ == 0, "Remaining is not 0 but %u", flow->remaining_);
120 receive_callback(socket);
123 static void errorClose_callback(ns3::Ptr<ns3::Socket> socket)
125 SgFlow* flow = getFlowFromSocket(socket);
126 XBT_DEBUG("errorClose_cb of F[%p, %p, %u]", flow, flow->action_, flow->total_bytes_);
127 xbt_die("ns-3: a socket was closed anormally");
130 static void succeededConnect_callback(ns3::Ptr<ns3::Socket> socket)
132 SgFlow* flow = getFlowFromSocket(socket);
133 XBT_DEBUG("succeededConnect_cb of F[%p, %p, %u]", flow, flow->action_, flow->total_bytes_);
136 static void failedConnect_callback(ns3::Ptr<ns3::Socket> socket)
138 SgFlow* mysocket = getFlowFromSocket(socket);
139 XBT_DEBUG("failedConnect_cb of F[%p, %p, %u]", mysocket, mysocket->action_, mysocket->total_bytes_);
140 xbt_die("ns-3: a socket failed to connect");
143 void start_flow(ns3::Ptr<ns3::Socket> sock, const char* to, uint16_t port_number)
145 SgFlow* flow = getFlowFromSocket(sock);
146 ns3::InetSocketAddress serverAddr(to, port_number);
148 sock->Connect(serverAddr);
149 // tell the tcp implementation to call send_cb again
150 // if we blocked and new tx buffer space becomes available
151 sock->SetSendCallback(MakeCallback(&send_cb));
152 // Notice when we actually sent some data (mostly for the TRACING module)
153 sock->SetDataSentCallback(MakeCallback(&datasent_cb));
155 XBT_DEBUG("startFlow of F[%p, %p, %u] dest=%s port=%d", flow, flow->action_, flow->total_bytes_, to, port_number);
157 sock->SetConnectCallback(MakeCallback(&succeededConnect_callback), MakeCallback(&failedConnect_callback));
158 sock->SetCloseCallbacks(MakeCallback(&normalClose_callback), MakeCallback(&errorClose_callback));