1 /* Copyright (c) 2007-2018. 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>
15 std::map<std::string, SgFlow*> flow_from_sock; // ns3::sock -> SgFlow
17 static void receive_callback(ns3::Ptr<ns3::Socket> socket);
18 static void datasent_cb(ns3::Ptr<ns3::Socket> socket, uint32_t dataSent);
20 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(ns3);
22 SgFlow::SgFlow(uint32_t totalBytes, simgrid::kernel::resource::NetworkNS3Action* action)
24 total_bytes_ = totalBytes;
25 remaining_ = totalBytes;
29 static SgFlow* getFlowFromSocket(ns3::Ptr<ns3::Socket> socket)
31 auto it = flow_from_sock.find(transform_socket_ptr(socket));
32 return (it == flow_from_sock.end()) ? nullptr : it->second;
35 static void receive_callback(ns3::Ptr<ns3::Socket> socket)
37 SgFlow* flow = getFlowFromSocket(socket);
38 XBT_DEBUG("received on F[%p, total: %u, remain: %u]", flow, flow->total_bytes_, flow->remaining_);
40 if (flow->finished_ == false) {
41 flow->finished_ = true;
42 XBT_DEBUG("recv_cb of F[%p, %p, %u]", flow, flow->action_, flow->total_bytes_);
43 XBT_DEBUG("Stop simulator at %f seconds", ns3::Simulator::Now().GetSeconds());
44 ns3::Simulator::Stop(ns3::Seconds(0.0));
45 ns3::Simulator::Run();
49 static void send_cb(ns3::Ptr<ns3::Socket> sock, uint32_t txSpace)
51 SgFlow* flow = getFlowFromSocket(sock);
52 XBT_DEBUG("Asked to write on F[%p, total: %u, remain: %u]", flow, flow->total_bytes_, flow->remaining_);
54 if (flow->remaining_ == 0) // all data was already buffered (and socket was already closed)
57 /* While not all is buffered and there remain space in the buffers */
58 while (flow->buffered_bytes_ < flow->total_bytes_ && sock->GetTxAvailable() > 0) {
60 // Send at most 1040 bytes (data size in a TCP packet), as NS3 seems to not split correctly by itself
61 uint32_t toWrite = std::min({flow->remaining_, sock->GetTxAvailable(), std::uint32_t(1040)});
62 if (toWrite == 0) { // buffer full
63 XBT_DEBUG("%f: buffer full on flow %p (still %u to go)", ns3::Simulator::Now().GetSeconds(), flow,
67 int amountSent = sock->Send(0, toWrite, 0);
69 xbt_assert(amountSent > 0, "Since TxAvailable>0, amountSent should also >0");
70 flow->buffered_bytes_ += amountSent;
71 flow->remaining_ -= amountSent;
73 XBT_DEBUG("%f: sent %d bytes over flow %p (still %u to go)", ns3::Simulator::Now().GetSeconds(), amountSent, flow,
77 if (flow->buffered_bytes_ >= flow->total_bytes_)
81 static void datasent_cb(ns3::Ptr<ns3::Socket> socket, uint32_t dataSent)
83 /* The tracing wants to know */
84 SgFlow* flow = getFlowFromSocket(socket);
85 flow->sent_bytes_ += dataSent;
86 XBT_DEBUG("datasent_cb of F[%p, %p, %u] %u sent (%u total)", flow, flow->action_, flow->total_bytes_, dataSent,
90 static void normalClose_callback(ns3::Ptr<ns3::Socket> socket)
92 SgFlow* flow = getFlowFromSocket(socket);
93 XBT_DEBUG("normalClose_cb of F[%p, %p] total: %u; sent: %u", flow, flow->action_, flow->total_bytes_,
95 // xbt_assert(flow->total_bytes_ == flow->sent_bytes_,
96 // "total_bytes (=%u) is not sent_bytes(=%u)", flow->total_bytes_ , flow->sent_bytes_);
97 // xbt_assert(flow->remaining_ == 0, "Remaining is not 0 but %u", flow->remaining_);
98 receive_callback(socket);
101 static void errorClose_callback(ns3::Ptr<ns3::Socket> socket)
103 SgFlow* flow = getFlowFromSocket(socket);
104 XBT_DEBUG("errorClose_cb of F[%p, %p, %u]", flow, flow->action_, flow->total_bytes_);
105 xbt_die("NS3: a socket was closed anormally");
108 static void succeededConnect_callback(ns3::Ptr<ns3::Socket> socket)
110 SgFlow* flow = getFlowFromSocket(socket);
111 XBT_DEBUG("succeededConnect_cb of F[%p, %p, %u]", flow, flow->action_, flow->total_bytes_);
114 static void failedConnect_callback(ns3::Ptr<ns3::Socket> socket)
116 SgFlow* mysocket = getFlowFromSocket(socket);
117 XBT_DEBUG("failedConnect_cb of F[%p, %p, %u]", mysocket, mysocket->action_, mysocket->total_bytes_);
118 xbt_die("NS3: a socket failed to connect");
121 void start_flow(ns3::Ptr<ns3::Socket> sock, const char* to, uint16_t port_number)
123 SgFlow* flow = getFlowFromSocket(sock);
124 ns3::InetSocketAddress serverAddr(to, port_number);
126 sock->Connect(serverAddr);
127 // tell the tcp implementation to call send_cb again
128 // if we blocked and new tx buffer space becomes available
129 sock->SetSendCallback(MakeCallback(&send_cb));
130 // Notice when the send is over
131 sock->SetRecvCallback(MakeCallback(&receive_callback));
132 // Notice when we actually sent some data (mostly for the TRACING module)
133 sock->SetDataSentCallback(MakeCallback(&datasent_cb));
135 XBT_DEBUG("startFlow of F[%p, %p, %u] dest=%s port=%d", flow, flow->action_, flow->total_bytes_, to, port_number);
137 sock->SetConnectCallback(MakeCallback(&succeededConnect_callback), MakeCallback(&failedConnect_callback));
138 sock->SetCloseCallbacks(MakeCallback(&normalClose_callback), MakeCallback(&errorClose_callback));