This release is immediately available from here.

Supported platforms

ns-3.7 has been tested on the following platforms:

  • linux x86 gcc 4.4.0, 4.3.2, 4.2, 4.1.1, 4.1 and 3.4.6 (debug and optimized)
  • linux x86_64 gcc 4.4.0, 4.3.2, 4.2.4, 4.2.3, 4.2.1, 4.1.3, 3.4.6 (debug and optimized)
  • MacOS X ppc gcc 4.0.x and 4.2.x (debug and optimized)
  • cygwin gcc 3.4.4 (debug only), gcc 4.3.2 (debug and optimized)

Unofficially supported platform

mingw gcc 3.4.5 (debug only)

Not all ns-3 options are available on all platforms; consult the Installation page for more information.

New user-visible features

  • Ad hoc On-Demand Distance Vector (AODV) routing model (RFC 3561)
  • IPv6 extensions support to add IPv6 extensions and options. Two examples (fragmentation and loose routing) are available.
  • NetAnim interface: Provides an interface to the Qt-based NetAnim animator, which supports static, point-to-point topology-based packet animations.
  • New topology helpers have been introduced – PointToPointDumbbellHelper – PointToPointGridHelper – PointToPointStarHelper – CsmaStarHelper
  • Equal-cost multipath for global routing: Enables quagga’s equal cost multipath for Ipv4GlobalRouting, and adds an attribute that can enable it with random packet distribution policy across equal cost routes.
  • Binding sockets to devices: A method analogous to a SO_BINDTODEVICE socket option has been introduced to class Socket
  • Object::DoStart: Users who need to complete their object setup at the start of a simulation can override this virtual method, perform their adhoc setup, and then, must chain up to their parent.
  • Ipv4::IsDestinationAddress method added to support checks of whether a destination address should be accepted as one of the host’s own addresses.
  • UniformDiscPositionAllocator added; distributes uniformly the nodes within a disc of given radius.
  • ChannelNumber attribute added to YansWifiPhy. Now it is possible to setup wifi channel using WifiPhyHelper::Set() method.
  • WaypointMobilityModel provides a method to add mobility as a set of (time, position) pairs
  • 802.11p WiFi standards
  • UDP Client/Server application
  • Support transactions in the SQLite output interface, making it usable for larger amounts of data

Bugs fixed

The following lists many of the bugs that were fixed since ns-3.6, in many cases referencing the Bugzilla bug number:

  • bug 752: Object::DoStart is not executed for objects created at t > 0
  • bug 767: Incorrect modulation for 802.11a modes
  • bug 725: wifi fragmentation and RTS cannot be used at the same time
  • bug 782: CreateTap () requires IP address in modes other than CONFIGURE_LOCAL.
  • bug 769: Queue::GetTotalReceived{Bytes,Packets}() broken
  • bug 738 ReceiveErrorModel called too late
  • Fix NSC improper response to FIN
  • Fixed bug in serialization of PbbAddressBlock.
  • Fix bug 780 (problem in RoutingTableComputation with asymetric links), while adding debugging methods to OLSR.
  • bug 759: Ipv6 uses wrong outgoing interface.
  • bug 770: IPv6 size calculation for unknown options is wrong.
  • bug 771: Radvd does not set ttl value.
  • Fix bug 606: Arp depends on IP routing system
  • pad out CSMA payloads to 46 bytes if needed
  • Drop CSMA packets with CRC errors, rescan, dox tweaks
  • Add FCS capability to CSMA
  • Mesh:Dot11s: fixed airtime metric
  • Get emu working again: Add Dix/Llc option, add and use contextual realtime schedule ops, don’t refcount realtime simulator impl
  • bug 695 – DcfManager::UpdateBackoff () uses slow HighPrecision::Div()
  • bug 674 – EIFS is not handled correctly in DcfManager::GetAccessGrantStart
  • bug 739 – OLSR: Strange HTime value in HELLO messages
  • bug 746 – UDP source address is not set to bound address
  • bug 735 Update Olsr for local delivery
  • bug 740 OLSR MprCompute () works wrong: fixed
  • bug 729 Enable IPv6 over PPP.
  • bug 645: fixes for opening stats file with OMNeT++
  • bug 689: default energy detection and CCA thresholds are changed to be more realistic.
  • bug 733: OLSR MPR Computation give incorrect result
  • Mesh: HWMP: fixed proactive routes
  • Mesh: fixed FLAME PATH_UPDATE procedure, fixed mesh.cc

Known issues

ns-3 builds have been known to fail on the following platforms:

  • gcc 3.3 and earlier
  • optimized builds on gcc 3.4.4 and 3.4.5
  • optimized builds on linux x86 gcc 4.0.x