-/* Copyright (c) 2007-2020. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2007-2021. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include "src/surf/xml/platf_private.hpp"
#include "surf/surf.hpp"
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(ns3, surf, "Logging specific to the SURF network ns-3 module");
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(res_ns3, res_network, "Network model based on ns-3");
/*****************
* Crude globals *
*****************/
-extern std::map<std::string, SgFlow*> flow_from_sock;
-extern std::map<std::string, ns3::ApplicationContainer> sink_from_sock;
+extern std::map<std::string, SgFlow*, std::less<>> flow_from_sock;
+extern std::map<std::string, ns3::ApplicationContainer, std::less<>> sink_from_sock;
static ns3::InternetStackHelper stack;
/* wifi globals */
static ns3::WifiHelper wifi;
-static ns3::YansWifiPhyHelper wifiPhy = ns3::YansWifiPhyHelper::Default();
+#if NS3_MINOR_VERSION < 33
+static ns3::YansWifiPhyHelper wifiPhy = ns3::YansWifiPhyHelper::Default();
+#else
+static ns3::YansWifiPhyHelper wifiPhy;
+#endif
static ns3::YansWifiChannelHelper wifiChannel = ns3::YansWifiChannelHelper::Default();
static ns3::WifiMacHelper wifiMac;
static ns3::MobilityHelper mobility;
stack.Install(ns3_node_);
}
-WifiZone::WifiZone(const std::string& name_, simgrid::s4u::Host* host_, ns3::Ptr<ns3::Node> ap_node_,
- ns3::Ptr<ns3::YansWifiChannel> channel_, int mcs_, int nss_, int network_, int link_)
- : name(name_)
- , host(host_)
- , ap_node(ap_node_)
- , channel(channel_)
- , mcs(mcs_)
- , nss(nss_)
- , network(network_)
- , link(link_)
+static void resumeWifiDevice(ns3::Ptr<ns3::WifiNetDevice> device)
{
- n_sta_nodes = 0;
- wifi_zones[name_] = this;
-}
-
-bool WifiZone::is_ap(ns3::Ptr<ns3::Node> node)
-{
- for (std::pair<std::string, WifiZone*> zone : wifi_zones)
- if (zone.second->get_ap_node() == node)
- return true;
- return false;
-}
-
-WifiZone* WifiZone::by_name(const std::string& name)
-{
- WifiZone* zone;
- try {
- zone = wifi_zones.at(name);
- } catch (const std::out_of_range& oor) {
- return nullptr;
- }
- return zone;
-}
-
-std::unordered_map<std::string, WifiZone*> WifiZone::wifi_zones;
-
-static void initialize_ns3_wifi()
-{
- wifi.SetStandard(ns3::WIFI_PHY_STANDARD_80211n_5GHZ);
-
- for (auto host : simgrid::s4u::Engine::get_instance()->get_all_hosts()) {
- const char* wifi_link = host->get_property("wifi_link");
- const char* wifi_mcs = host->get_property("wifi_mcs");
- const char* wifi_nss = host->get_property("wifi_nss");
-
- if (wifi_link)
- new WifiZone(wifi_link, host, host->get_netpoint()->extension<NetPointNs3>()->ns3_node_, wifiChannel.Create(),
- wifi_mcs ? atoi(wifi_mcs) : 3, wifi_nss ? atoi(wifi_nss) : 1, 0, 0);
- }
+ device->GetPhy()->ResumeFromOff();
}
/*************
simgrid::kernel::routing::WifiZone* wifizone = dynamic_cast<simgrid::kernel::routing::WifiZone*> (zone.get_impl());
if (wifizone == nullptr) return;
+#if NS3_MINOR_VERSION < 32
wifi.SetStandard(ns3::WIFI_PHY_STANDARD_80211n_5GHZ);
+#else
+ wifi.SetStandard(ns3::WIFI_STANDARD_80211n_5GHZ);
+#endif
std::string ssid = wifizone->get_name();
const char* mcs = wifizone->get_property("mcs");
const char* nss = wifizone->get_property("nss");
int mcs_value = mcs ? atoi(mcs) : 3;
int nss_value = nss ? atoi(nss) : 1;
+#if NS3_MINOR_VERSION < 30
+ if(nss_value != 1+(mcs_value/8))
+ xbt_die("On NS3 < 3.30, NSS value has to satisfy NSS == 1+(MCS/8) constraint. Bailing out");
+#endif
wifi.SetRemoteStationManager("ns3::ConstantRateWifiManager",
"ControlMode", ns3::StringValue("HtMcs0"),
"DataMode", ns3::StringValue("HtMcs" + std::to_string(mcs_value)));
netDevices.Add(wifi.Install(wifiPhy, wifiMac, station_ns3_node));
}
+ const char* start_time = wifizone->get_property("start_time");
+ int start_time_value = start_time ? atoi(start_time) : 0;
+ for (uint32_t i = 0; i < netDevices.GetN(); i++) {
+ ns3::Ptr<ns3::WifiNetDevice> device = ns3::StaticCast<ns3::WifiNetDevice>(netDevices.Get(i));
+ device->GetPhy()->SetOffMode();
+ ns3::Simulator::Schedule(ns3::Seconds(start_time_value), &resumeWifiDevice, device);
+ }
+
ns3::Config::Set("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Phy/ChannelWidth", ns3::UintegerValue(40));
mobility.SetPositionAllocator(positionAllocS);
address.SetBase(addr.c_str(), "255.255.0.0");
XBT_DEBUG("\tInterface stack '%s'", addr.c_str());
ns3::Ipv4InterfaceContainer addresses = address.Assign(netDevices);
- for (int i = 0; i < hosts_netpoints.size(); i++) {
+ for (unsigned int i = 0; i < hosts_netpoints.size(); i++) {
hosts_netpoints[i]->ipv4_address_ = transformIpv4Address(addresses.GetAddress(i));
}
s4u::NetZone::on_seal.connect(&zoneCreation_cb);
}
-LinkImpl* NetworkNS3Model::create_link(const std::string& name, const std::vector<double>& bandwidths, double latency,
+LinkImpl* NetworkNS3Model::create_link(const std::string& name, const std::vector<double>& bandwidths,
s4u::Link::SharingPolicy policy)
{
xbt_assert(bandwidths.size() == 1, "ns-3 links must use only 1 bandwidth.");
- return new LinkNS3(this, name, bandwidths[0], latency, policy);
+ return new LinkNS3(name, bandwidths[0], policy);
}
Action* NetworkNS3Model::communicate(s4u::Host* src, s4u::Host* dst, double size, double rate)
ns3_socket = elm.first;
SgFlow* sgFlow = elm.second;
NetworkNS3Action * action = sgFlow->action_;
- XBT_DEBUG("Processing socket %p (action %p)",sgFlow,action);
+ XBT_DEBUG("Processing flow %p (socket %s, action %p)", sgFlow, ns3_socket.c_str(), action);
// Because NS3 stops as soon as a flow is finished, the other flows that ends at the same time may remains in an
// inconsistent state (i.e. remains_ == 0 but finished_ == false).
// However, SimGrid considers sometimes that an action with remains_ == 0 is finished.
ns3_socket = socket_to_destroy.back();
socket_to_destroy.pop_back();
SgFlow* flow = flow_from_sock.at(ns3_socket);
- if (XBT_LOG_ISENABLED(ns3, xbt_log_priority_debug)) {
+ if (XBT_LOG_ISENABLED(res_ns3, xbt_log_priority_debug)) {
XBT_DEBUG("Removing socket %s of action %p", ns3_socket.c_str(), flow->action_);
}
delete flow;
* Resource *
************/
-LinkNS3::LinkNS3(NetworkNS3Model* model, const std::string& name, double bandwidth, double latency,
- s4u::Link::SharingPolicy policy)
- : LinkImpl(model, name, nullptr), sharing_policy_(policy)
+LinkNS3::LinkNS3(const std::string& name, double bandwidth, s4u::Link::SharingPolicy policy)
+ : LinkImpl(name), sharing_policy_(policy)
{
bandwidth_.peak = bandwidth;
- latency_.peak = latency;
-
- /* If wifi, create the wifizone now. If not, don't do anything: the links will be created in routeCreate_cb */
-
- if (policy == simgrid::s4u::Link::SharingPolicy::WIFI) {
- static bool wifi_init = false;
- if (!wifi_init) {
- initialize_ns3_wifi();
- wifi_init = true;
- }
-
- ns3::NetDeviceContainer netA;
- WifiZone* zone = WifiZone::by_name(name);
- xbt_assert(zone != nullptr, "Link name '%s' does not match the 'wifi_link' property of a host.", name.c_str());
- auto* netpoint_ns3 = zone->get_host()->get_netpoint()->extension<NetPointNs3>();
-
- wifi.SetRemoteStationManager("ns3::ConstantRateWifiManager", "ControlMode", ns3::StringValue("HtMcs0"), "DataMode",
- ns3::StringValue("HtMcs" + std::to_string(zone->get_mcs())));
-
- wifiPhy.SetChannel(zone->get_channel());
- wifiPhy.Set("Antennas", ns3::UintegerValue(zone->get_nss()));
- wifiPhy.Set("MaxSupportedTxSpatialStreams", ns3::UintegerValue(zone->get_nss()));
- wifiPhy.Set("MaxSupportedRxSpatialStreams", ns3::UintegerValue(zone->get_nss()));
-
- wifiMac.SetType("ns3::ApWifiMac",
- "Ssid", ns3::SsidValue(name));
-
- netA.Add(wifi.Install(wifiPhy, wifiMac, zone->get_ap_node()));
-
- ns3::Ptr<ns3::ListPositionAllocator> positionAllocS = ns3::CreateObject<ns3::ListPositionAllocator>();
- positionAllocS->Add(ns3::Vector(0, 0, 0));
- mobility.SetPositionAllocator(positionAllocS);
- mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
- mobility.Install(zone->get_ap_node());
-
- ns3::Ipv4AddressHelper address;
- std::string addr = simgrid::xbt::string_printf("%d.%d.0.0", number_of_networks, number_of_links);
- address.SetBase(addr.c_str(), "255.255.0.0");
- XBT_DEBUG("\tInterface stack '%s'", addr.c_str());
- auto addresses = address.Assign(netA);
- zone->set_network(number_of_networks);
- zone->set_link(number_of_links);
-
- netpoint_ns3->ipv4_address_ = transformIpv4Address(addresses.GetAddress(1));
-
- if (number_of_links == 255) {
- xbt_assert(number_of_networks < 255, "Number of links and networks exceed 255*255");
- number_of_links = 1;
- number_of_networks++;
- } else {
- number_of_links++;
- }
- }
- s4u::Link::on_creation(*this->get_iface());
}
LinkNS3::~LinkNS3() = default;
NetworkNS3Action::NetworkNS3Action(Model* model, double totalBytes, s4u::Host* src, s4u::Host* dst)
: NetworkAction(model, *src, *dst, totalBytes, false)
{
+ // ns-3 fails when src = dst, so avoid the problem by considering that communications are infinitely fast on the
+ // loopback that does not exists
+ if (src == dst) {
+ static bool warned = false;
+ if (not warned) {
+ XBT_WARN("Sending from a host %s to itself is not supported by ns-3. Every such communication finishes "
+ "immediately upon startup.",
+ src->get_cname());
+ warned = true;
+ }
+ finish(Action::State::FINISHED);
+ return;
+ }
+
// If there is no other started actions, we need to move NS-3 forward to be sync with SimGrid
if (model->get_started_action_set()->size()==1){
while(double_positive(surf_get_clock() - ns3::Simulator::Now().GetSeconds(), sg_surf_precision)){
}
}
- static int port_number = 1025; // Port number is limited from 1025 to 65 000
+ static uint16_t port_number = 1;
ns3::Ptr<ns3::Node> src_node = src->get_netpoint()->extension<NetPointNs3>()->ns3_node_;
ns3::Ptr<ns3::Node> dst_node = dst->get_netpoint()->extension<NetPointNs3>()->ns3_node_;
sink_from_sock.insert({transform_socket_ptr(sock), apps});
sock->Bind(ns3::InetSocketAddress(port_number));
-
ns3::Simulator::ScheduleNow(&start_flow, sock, addr.c_str(), port_number);
- port_number++;
- if(port_number > 65000){
- port_number = 1025;
+ port_number = 1 + (port_number % UINT16_MAX);
+ if (port_number == 1)
XBT_WARN("Too many connections! Port number is saturated. Trying to use the oldest ports.");
- }
s4u::Link::on_communicate(*this);
}
xbt_assert(host_dst != nullptr, "Network element %s does not seem to be ns-3-ready", dst->get_cname());
if (policy == simgrid::s4u::Link::SharingPolicy::WIFI) {
- auto a = host_src->ns3_node_;
- auto b = host_dst->ns3_node_;
- xbt_assert(WifiZone::is_ap(a) != WifiZone::is_ap(b),
- "A wifi route can only exist between an access point node and a station node.");
-
- ns3::Ptr<ns3::Node> apNode = WifiZone::is_ap(a) ? a : b;
- ns3::Ptr<ns3::Node> staNode = apNode == a ? b : a;
-
- WifiZone* zone = WifiZone::by_name(link_name);
-
- wifi.SetRemoteStationManager("ns3::ConstantRateWifiManager", "ControlMode", ns3::StringValue("HtMcs0"), "DataMode",
- ns3::StringValue("HtMcs" + std::to_string(zone->get_mcs())));
-
- wifiPhy.SetChannel(zone->get_channel());
- wifiPhy.Set("Antennas", ns3::UintegerValue(zone->get_nss()));
- wifiPhy.Set("MaxSupportedTxSpatialStreams", ns3::UintegerValue(zone->get_nss()));
- wifiPhy.Set("MaxSupportedRxSpatialStreams", ns3::UintegerValue(zone->get_nss()));
-
- wifiMac.SetType ("ns3::StaWifiMac",
- "Ssid", ns3::SsidValue(link_name),
- "ActiveProbing", ns3::BooleanValue(false));
-
- netA.Add(wifi.Install(wifiPhy, wifiMac, staNode));
-
- ns3::Config::Set("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Phy/ChannelWidth", ns3::UintegerValue(40));
-
- simgrid::kernel::routing::NetPoint* sta_netpoint = WifiZone::is_ap(host_src->ns3_node_) ? dst : src;
- const char* wifi_distance = simgrid::s4u::Host::by_name(sta_netpoint->get_name())->get_property("wifi_distance");
- ns3::Ptr<ns3::ListPositionAllocator> positionAllocS = ns3::CreateObject<ns3::ListPositionAllocator>();
- positionAllocS->Add(ns3::Vector(wifi_distance ? atof(wifi_distance) : 10.0, 0, 0));
- mobility.SetPositionAllocator(positionAllocS);
- mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
- mobility.Install(staNode);
-
- std::string addr = simgrid::xbt::string_printf("%d.%d.0.0", zone->get_network(), zone->get_link());
- address.SetBase(addr.c_str(), "255.255.0.0", ("0.0.0." + std::to_string(zone->get_n_sta_nodes() + 2)).c_str());
- zone->add_sta_node();
- XBT_DEBUG("\tInterface stack '%s'", addr.c_str());
- auto addresses = address.Assign(netA);
- host_dst->ipv4_address_ = transformIpv4Address(addresses.GetAddress(1));
+ xbt_die("The wifi sharing policy is not supported for links. You want to use a wifi zone (see documentation).");
} else {
ns3::PointToPointHelper pointToPoint;
