| Alexander Afanasyev | 6dbacda | 2012-10-23 17:20:18 -0700 | [diff] [blame^] | 1 | FAQ |
| 2 | === |
| 3 | |
| 4 | Boost libraries |
| 5 | --------------- |
| 6 | |
| 7 | .. topic:: Custom boost libraries compilation problem |
| 8 | |
| 9 | I'm trying to use custom boost libraries, but something is going wrong. What should I do? |
| 10 | |
| 11 | Please refer to :ref:`boost-custom-install` section for an example how custom boost libraries could be built. |
| 12 | |
| 13 | |
| 14 | Visualizer problems |
| 15 | ------------------- |
| 16 | |
| 17 | .. topic:: Visualizer module is not working |
| 18 | |
| 19 | Every time I'm trying to run visualizer, I get the following error:: |
| 20 | |
| 21 | Waf: Entering directory `/ndnSIM/ns-3/build' |
| 22 | Could not find a task generator for the name 'ns3-visualizer'.. |
| 23 | |
| 24 | Something is wrong with your python bindings and python bindings dependencies. |
| 25 | Please follow the :ref:`requirements` section that lists what should be installed in order to run visualizer. |
| 26 | |
| 27 | Code questions |
| 28 | -------------- |
| 29 | |
| 30 | .. topic:: Failing a link between nodes |
| 31 | |
| 32 | How can I fail a link between to NDN nodes? |
| 33 | |
| 34 | |
| 35 | Right now, NS-3 does not provide ability to actually "break" the link between nodes in NS-3. |
| 36 | However, exactly the same effect can be achieved by making an interface (:ndnsim:`ndn::Face`) up or down (:ndnsim:`ndn::Face::SetUp(true)` or :ndnsim:`ndn::Face::SetUp(false)`). |
| 37 | |
| 38 | Here is an example of function to "fail" a point-to-point link between two NDN nodes: |
| 39 | |
| 40 | .. code-block:: c++ |
| 41 | |
| 42 | // hijacker is more than an application. just disable all faces |
| 43 | void |
| 44 | FailLinks (Ptr<Node> node1, Ptr<Node> node2) |
| 45 | { |
| 46 | Ptr<ndn::L3Protocol> ndn1 = node1->GetObject<ndn::L3Protocol> (); |
| 47 | Ptr<ndn::L3Protocol> ndn2 = node2->GetObject<ndn::L3Protocol> (); |
| 48 | |
| 49 | // iterate over all faces to find the right one |
| 50 | for (uint32_t faceId = 0; faceId < ndn1->GetNFaces (); faceId++) |
| 51 | { |
| 52 | Ptr<ndn::NetDeviceFace> ndFace = ndn1->GetFace (faceId)->GetObject<ndn::NetDeviceFace> (); |
| 53 | if (ndFace == 0) continue; |
| 54 | |
| 55 | Ptr<PointToPointNetDevice> nd1 = ndFace->GetNetDevice ()->GetObject<PointToPointNetDevice> (); |
| 56 | if (nd1 == 0) continue; |
| 57 | |
| 58 | Ptr<Channel> channel = nd1->GetChannel (); |
| 59 | if (channel == 0) continue; |
| 60 | |
| 61 | Ptr<PointToPointChannel> ppChannel = DynamicCast<PointToPointChannel> (channel); |
| 62 | |
| 63 | Ptr<NetDevice> nd2 = ppChannel->GetDevice (0); |
| 64 | if (nd2->GetNode () == node1) |
| 65 | nd2 = ppChannel->GetDevice (1); |
| 66 | |
| 67 | if (nd2->GetNode () == node2) |
| 68 | { |
| 69 | Ptr<ndn::Face> face1 = ndn1->GetFaceByNetDevice (nd1); |
| 70 | Ptr<ndn::Face> face2 = ndn2->GetFaceByNetDevice (nd2); |
| 71 | |
| 72 | face1->SetUp (false); |
| 73 | face2->SetUp (false); |
| 74 | break; |
| 75 | } |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | |
| 80 | General questions |
| 81 | ----------------- |
| 82 | |
| 83 | .. topic:: Errors/bugs reporting |
| 84 | |
| 85 | I found an error in the documentation / bug in the code. What should I do? |
| 86 | |
| 87 | Please create an issue for the documentation error or code bug. |
| 88 | We will try to resolve the problem as fast as we can. |