#include <unordered_set>
#include "xbt/config.hpp"
+#include "xbt/str.h"
#include "xbt/string.hpp"
#include "xbt/utility.hpp"
#include "ns3/ns3_simulator.hpp"
#include "simgrid/kernel/routing/NetPoint.hpp"
+#include "simgrid/kernel/routing/WifiZone.hpp"
#include "simgrid/plugins/energy.h"
#include "simgrid/s4u/Engine.hpp"
#include "simgrid/s4u/NetZone.hpp"
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_)
-{
- n_sta_nodes = 0;
- wifi_zones[name_] = this;
-}
+/*************
+ * Callbacks *
+ *************/
-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;
-}
+static void zoneCreation_cb(simgrid::s4u::NetZone const& zone) {
+ 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;
+ wifi.SetRemoteStationManager("ns3::ConstantRateWifiManager",
+ "ControlMode", ns3::StringValue("HtMcs0"),
+ "DataMode", ns3::StringValue("HtMcs" + std::to_string(mcs_value)));
+ wifiPhy.SetChannel(wifiChannel.Create());
+ wifiPhy.Set("Antennas", ns3::UintegerValue(nss_value));
+ wifiPhy.Set("MaxSupportedTxSpatialStreams", ns3::UintegerValue(nss_value));
+ wifiPhy.Set("MaxSupportedRxSpatialStreams", ns3::UintegerValue(nss_value));
+ wifiMac.SetType("ns3::ApWifiMac",
+ "Ssid", ns3::SsidValue(ssid));
-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;
-}
+ mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
+ ns3::Ptr<ns3::ListPositionAllocator> positionAllocS = ns3::CreateObject<ns3::ListPositionAllocator>();
+ positionAllocS->Add(ns3::Vector(0, 0, 255 * 100 * number_of_networks + 100 * number_of_links));
-std::unordered_map<std::string, WifiZone*> WifiZone::wifi_zones;
+ ns3::NetDeviceContainer netDevices;
+ NetPointNs3* access_point_netpoint_ns3 = wifizone->get_access_point()->extension<NetPointNs3>();
-static void initialize_ns3_wifi()
-{
- wifi.SetStandard(ns3::WIFI_PHY_STANDARD_80211n_5GHZ);
+ ns3::Ptr<ns3::Node> access_point_ns3_node = access_point_netpoint_ns3->ns3_node_;
+ ns3::NodeContainer nodes = {access_point_ns3_node};
+ std::vector<NetPointNs3*> hosts_netpoints = {access_point_netpoint_ns3};
+ netDevices.Add(wifi.Install(wifiPhy, wifiMac,access_point_ns3_node));
- 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");
+ wifiMac.SetType ("ns3::StaWifiMac",
+ "Ssid", ns3::SsidValue(ssid),
+ "ActiveProbing", ns3::BooleanValue(false));
- 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);
- }
-}
+ NetPointNs3* station_netpoint_ns3 = nullptr;
+ ns3::Ptr<ns3::Node> station_ns3_node = nullptr;
+ double distance;
+ double angle = 0;
+ int nb_stations = wifizone->get_all_hosts().size() - 1;
+ double step = 2 * M_PI / nb_stations;
+ for (auto station_host : wifizone->get_all_hosts()) {
+ station_netpoint_ns3 = station_host->get_netpoint()->extension<NetPointNs3>();
+ if (station_netpoint_ns3 == access_point_netpoint_ns3)
+ continue;
+ hosts_netpoints.push_back(station_netpoint_ns3);
+ distance = station_host->get_property("wifi_distance") ? atof(station_host->get_property("wifi_distance")) : 10.0;
+ positionAllocS->Add(ns3::Vector(distance * std::cos(angle), distance * std::sin(angle), 255 * 100 * number_of_networks + 100 * number_of_links));
+ angle += step;
+ station_ns3_node = station_netpoint_ns3->ns3_node_;
+ nodes.Add(station_ns3_node);
+ netDevices.Add(wifi.Install(wifiPhy, wifiMac, station_ns3_node));
+ }
-/*************
- * Callbacks *
- *************/
+ ns3::Config::Set("/NodeList/*/DeviceList/*/$ns3::WifiNetDevice/Phy/ChannelWidth", ns3::UintegerValue(40));
+
+ mobility.SetPositionAllocator(positionAllocS);
+ mobility.Install(nodes);
+
+ 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());
+ ns3::Ipv4InterfaceContainer addresses = address.Assign(netDevices);
+ for (int i = 0; i < hosts_netpoints.size(); i++) {
+ hosts_netpoints[i]->ipv4_address_ = transformIpv4Address(addresses.GetAddress(i));
+ }
+
+ 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++;
+ }
+}
static void clusterCreation_cb(simgrid::kernel::routing::ClusterCreationArgs const& cluster)
{
std::vector<simgrid::kernel::resource::LinkImpl*> const& link_list)
{
if (link_list.size() == 1) {
- auto* link = static_cast<simgrid::kernel::resource::LinkNS3*>(link_list[0]);
+ auto const* link = static_cast<simgrid::kernel::resource::LinkNS3*>(link_list[0]);
XBT_DEBUG("Route from '%s' to '%s' with link '%s' %s %s", src->get_cname(), dst->get_cname(), link->get_cname(),
(link->get_sharing_policy() == simgrid::s4u::Link::SharingPolicy::WIFI ? "(wifi)" : "(wired)"),
}
static simgrid::config::Flag<std::string>
- ns3_tcp_model("ns3/TcpModel", "The ns-3 tcp model can be : NewReno or Reno or Tahoe", "default");
+ ns3_tcp_model("ns3/TcpModel", "The ns-3 tcp model can be: NewReno or Reno or Tahoe", "default");
+static simgrid::config::Flag<std::string> ns3_seed(
+ "ns3/seed",
+ "The random seed provided to ns-3. Either 'time' to seed with time(), blank to not set (default), or a number.", "",
+ [](std::string val) {
+ if (val.length() == 0)
+ return;
+ if (strcasecmp(val.c_str(), "time") == 0) {
+ std::srand(time(NULL));
+ ns3::RngSeedManager::SetSeed(std::rand());
+ ns3::RngSeedManager::SetRun(std::rand());
+ } else {
+ int v = xbt_str_parse_int(
+ val.c_str(), "Invalid value for option ns3/seed. It must be either 'time', a number, or left empty.");
+ ns3::RngSeedManager::SetSeed(v);
+ ns3::RngSeedManager::SetRun(v);
+ }
+ });
namespace simgrid {
namespace kernel {
});
routing::on_cluster_creation.connect(&clusterCreation_cb);
s4u::NetZone::on_route_creation.connect(&routeCreation_cb);
+ s4u::NetZone::on_seal.connect(&zoneCreation_cb);
}
LinkImpl* NetworkNS3Model::create_link(const std::string& name, const std::vector<double>& bandwidths, double latency,
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.
action->last_sent_ = sgFlow->sent_bytes_;
}
- if(sgFlow->finished_){
+ if ((sgFlow->finished_) && (remains <= 0)) { // finished_ should not become true before remains gets to 0, but it sometimes does. Let's play safe, here.
socket_to_destroy.push_back(ns3_socket);
- XBT_DEBUG("Destroy socket %p of action %p", ns3_socket.c_str(), action);
+ XBT_DEBUG("Destroy socket %s of action %p", ns3_socket.c_str(), action);
action->set_remains(0);
action->finish(Action::State::FINISHED);
} else {
- XBT_DEBUG("Socket %p sent %u bytes out of %u (%u remaining)", ns3_socket.c_str(), sgFlow->sent_bytes_,
+ XBT_DEBUG("Socket %s sent %u bytes out of %u (%u remaining)", ns3_socket.c_str(), sgFlow->sent_bytes_,
sgFlow->total_bytes_, sgFlow->remaining_);
}
}
socket_to_destroy.pop_back();
SgFlow* flow = flow_from_sock.at(ns3_socket);
if (XBT_LOG_ISENABLED(ns3, xbt_log_priority_debug)) {
- XBT_DEBUG("Removing socket %p of action %p", ns3_socket.c_str(), flow->action_);
+ XBT_DEBUG("Removing socket %s of action %p", ns3_socket.c_str(), flow->action_);
}
delete flow;
flow_from_sock.erase(ns3_socket);
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 != 0, "Link name '%s' does not match the 'wifi_link' property of a host.", name.c_str());
- NetPointNs3* 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());
}
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)){
}
}
- XBT_DEBUG("Communicate from %s to %s", src->get_cname(), dst->get_cname());
-
- 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_;
xbt_assert(not addr.empty(), "Element %s is unknown to ns-3. Is it connected to any one-hop link?",
dst->get_netpoint()->get_cname());
- XBT_DEBUG("ns3: Create flow of %.0f Bytes from %s to %s with Interface %s", totalBytes, src->get_cname(),
- dst->get_cname(), addr.c_str());
ns3::PacketSinkHelper sink("ns3::TcpSocketFactory", ns3::InetSocketAddress(ns3::Ipv4Address::GetAny(), port_number));
ns3::ApplicationContainer apps = sink.Install(dst_node);
ns3::Ptr<ns3::Socket> sock = ns3::Socket::CreateSocket(src_node, ns3::TcpSocketFactory::GetTypeId());
+ XBT_DEBUG("Create socket %s for a flow of %.0f Bytes from %s to %s with Interface %s",
+ transform_socket_ptr(sock).c_str(), totalBytes, src->get_cname(), dst->get_cname(), addr.c_str());
+
flow_from_sock.insert({transform_socket_ptr(sock), new SgFlow(totalBytes, this)});
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;
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);
host_src->ipv4_address_ = transformIpv4Address(addresses.GetAddress(0));
