- Ibr-dtn - lists.ibr.cs.tu-bs.de

transfer progress information
by Andri Jatmiko 16 Jan '14

16 Jan '14

Hi all, How to display file transfer progress in percentage on the receiver and the transmitter? ex. dtn://node1 (sender) dtnsend dtn://node2/sharebox /home/user/file.pdf.tar dtn://node2 (receiver) dtninbox sharebox sharebox/ I try to make GUI file transfer with Qt framework (and its work) for simplify dtnsend command via terminal, can I use Linux terminal commands to display the percentage or for making the file transfer progress bar? Is there any other method rather than using dtnd -v command? I would like to add those features on GUI file transfer. Kind regards, Didit Jatmiko

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Epidemic routing and received bundles (technical problem)
by Shyam B 15 Jan '14

15 Jan '14

Hi, This is regarding Epidemic routing and receiving bundles. Using dtntrigger for example, one can receive the bundle targeted to a particular target node. I.e. When the bundle arrives at the target node, the target node has an immediate knowledge of it (using payload, eid) via script. Consider the scenario where epidemic routing is used, and an *intermediate node* receives the bundle meant for a target node. Dtntrigger does not work in this case. My question is, how do I know that intermediate node has received a bundle (programmatically)? DTN daemon has this knowledge of received bundles by the intermediate node but, if an application running on this intermediate node wishes to know that some (external) bundle has been received, how would it know that. It is received into the 'bundles' directory, but I would like something like DTNTrigger for the intermediate node' knowledge! How can I achieve this? This approach will be very helpful in my aerial application. Thank you! -- Best Regards, Shyam

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Group messaging
by Jawad Seddar 15 Jan '14

15 Jan '14

Hi, I'm trying to send bundles from one node to multiple receivers. I noticed the -g and --group options in dtnrecv and dtnsend respectively but I can't seem to find the proper way to use these options. How should I use those options? I tried using them the same way I use the --name option in dtnrecv but no luck so far... Any pointers would be appreciated. Regards, Jawad

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Implementing new routing algorithm
by Andri Jatmiko 15 Jan '14

15 Jan '14

Hi everyone, I am a new user of IBR-DTN (v 0.10.2). I need help for several problem: How to make a new routing algorithm other than epidemic or prophet for IBR-DTN, such as RAPID? What is the test bench topology for epidemic or prophet? Which classes or procedures can be used on base router for making new routing algorithm? Thanks Didit Jatmiko

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funding development
by Tom Sparks 10 Jan '14

10 Jan '14

I am looking into funding development of ibr-dtn for my own project who do i contact? --- tom_a_sparks "It's a nerdy thing I like to do" Child of the Internet born 1983 PGP ID: A7EF6006 Please use ISO approved file formats excluding Office Open XML - http://www.gnu.org/philosophy/no-word-attachments.html Ubuntu wiki page https://wiki.ubuntu.com/tomsparks

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Static route
by Jawad Seddar 10 Jan '14

10 Jan '14

Hi everyone, I am a new user of IBR-DTN (v 0.10.2) and I would like to know if it is possible to add and delete static routes while the daemon is running (e.g. through API calls) in the same way we can add and delete connections through this api command : "connection <eid> [tcp|udp|file] [add|del] <ip> <port> <global|local>". Regards, J.

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How does IBR-DTN does neighbor discovery (really)?
by Shyam B 07 Jan '14

07 Jan '14

Hi, I am posting this question after a question has boggled me quite a bit. How does DTN really do its neighbor discovery? It runs the bundle protocol and I am running OLSR protocol below it. So, basically Mobile Ad-hoc routing protocol is what runs under it. Does it do the neighbor discovery using the help of underlying Ad-Hoc routing protocol OR does it have its "own way" of neighbor discovery using beacons alone (Layer 2)? This came to me as a surprise with a scenario I was testing where DTN still detects its neighbors when one runs OLSR and other does not: 1. Run DTN + OLSR on both nodes 2. Kill OLSR on one node, DTN still detects each other. 3. Pull down wireless LAN (wlan0) on the node(not running OLSR), wait and then bring it up. One sees the DTN neighbor all the time(with OLSR), the other cannot (node without OLSR). What happened now, is this a bug? I would have expected both to detect each other now (like in point 2 above) Finally, what is the use of TCP/UDP with DTN? How do nodes detect each other, when they do not know the IP address of any other DTN node?? My work is more on using DTN for an application, so apologies, if my questions might be a bit na'ive :) I have a presentation very soon, so your answers might help me understand this part. Thanks in advance! -- Best Regards, Shyam

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problems connecting PC's
by Luís Carlos Guedes 16 Dec '13

16 Dec '13

Hello, I tried to connect two pc's, switching on the deamons in 2 machines but i had some problems (it not appeared "deamon ready" as in the tutorial http://trac.ibr.cs.tu-bs.de/project-cm-2012-ibrdtn/wiki/ibr-dtn-tut) so it was not possible to do ping neither send messages between the 2 machines: Here is the code of the 2 machines when i turn on the deamon, can you help me how can i connect these 2 PC's? PC 1:parallels@parallels-Parallels-Virtual-Platform:~$ dtnd -i eth1 Mon Dec 16 11:35:40 2013 INFO Configuration: Using default settings. Call with --help for options. Mon Dec 16 11:35:40 2013 INFO NativeDaemon: IBR-DTN daemon 0.10.2 (build 1d89427) Mon Dec 16 11:35:40 2013 INFO Configuration: Using default settings. Call with --help for options. Mon Dec 16 11:35:40 2013 INFO BundleCore: Local node name: dtn://parallels-Parallels-Virtual-Platform Mon Dec 16 11:35:40 2013 INFO BundleCore: Forwarding of bundles enabled. Mon Dec 16 11:35:40 2013 INFO NativeDaemon: using bundle storage in memory-only mode Mon Dec 16 11:35:40 2013 INFO NativeDaemon: API initialized using tcp socket: loopback:4550 Mon Dec 16 11:35:40 2013 INFO NativeDaemon: TCP ConvergenceLayer added on eth1:4556 Mon Dec 16 11:35:40 2013 INFO DiscoveryAgent: listen to [ff02::142]:4551 Mon Dec 16 11:35:40 2013 INFO DiscoveryAgent: listen to [224.0.0.142]:4551 Mon Dec 16 11:35:40 2013 INFO DiscoveryAgent: add interface eth1 Mon Dec 16 11:35:40 2013 INFO NativeDaemon: Using default routing extensions PC2:default@default-1001P-CN:~$ dtnd -i eth0 Mon Dec 16 11:42:44 2013 INFO Configuration: Using default settings. Call with --help for options. Mon Dec 16 11:42:44 2013 INFO NativeDaemon: IBR-DTN daemon 0.10.2 (build 1d89427) Mon Dec 16 11:42:44 2013 INFO Configuration: Using default settings. Call with --help for options. Mon Dec 16 11:42:44 2013 INFO NativeDaemon: Parallel event processing enabled using 2 processes. Mon Dec 16 11:42:44 2013 INFO BundleCore: Local node name: dtn://default-1001P Mon Dec 16 11:42:44 2013 INFO BundleCore: Forwarding of bundles enabled. Mon Dec 16 11:42:44 2013 INFO NativeDaemon: using bundle storage in memory-only mode Mon Dec 16 11:42:44 2013 INFO NativeDaemon: API initialized using tcp socket: loopback:4550 Mon Dec 16 11:42:44 2013 INFO NativeDaemon: TCP ConvergenceLayer added on eth0:4556 Mon Dec 16 11:42:44 2013 INFO DiscoveryAgent: listen to [ff02::142]:4551 Mon Dec 16 11:42:44 2013 INFO DiscoveryAgent: listen to [224.0.0.142]:4551 Mon Dec 16 11:42:44 2013 INFO DiscoveryAgent: add interface eth0 Mon Dec 16 11:42:44 2013 INFO NativeDaemon: Using default routing extensions AFTER (tried to ping PC1->PC2): PC 1 (in different terminal window of PC1): parallels@parallels-Parallels-Virtual-Platform:~$ dtnping dtn://default-1001P/echo ECHO dtn://default-1001P/echo 64 bytes of data. ^C --- dtn://default-1001P/echo echo statistics --- 1 bundles transmitted, 0 received, 100% bundle loss, time 28.98 s rtt min/avg/max = 0.00/0.00/0.00 ms AFTER (tried in the different way PC2->PC1) PC2(in different terminal window of PC2):default@default-1001P-CN:~$ dtnping dtn:://parallels-Parallels-Virtual-Platform/echo ECHO dtn:://parallels-Parallels-Virtual-Platform/echo 64 bytes of data. ^C --- dtn:://parallels-Parallels-Virtual-Platform/echo echo statistics --- 1 bundles transmitted, 0 received, 100% bundle loss, time 14.83 s rtt min/avg/max = 0.00/0.00/0.00 ms Both ways did not work, how can i solve this? Thank you,Luís Guedes

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Improvement in the Fragmentation
by Luís Carlos Guedes 12 Dec '13

12 Dec '13

Hello, I wanted to make an improvement related to the fragmentation process. The fragmentation process is made node by node, which limits the efficiency of IBR-DTN. This process can be improved, by enabling the different parts of a bundle that could be received by a destination from different nodes. For example, a node A has a bundle to send to node D. First, 30 percent of the bundle are sent to node B and then 70 percent are sent to node C. Then i want that node D is able to receive the fragments from B and C and reassemble them together. Do you have some idea how can i do this?Is it and issue of the DTN or in the protocols of routing? Thank you in advance,Luis Guedes

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IBR-DTN strange behaviour on Android
by Guilherme Rolim 28 Nov '13

28 Nov '13

Hello, I've developed an app that sends informations via IBR-DTN bundles on broadcast. It was working fine on the first hour of test, but sometime later, the DTN bundles stopped being received by my app. When I restarted my phone and restarted the app all the bundles suddenly were received. Does anyone know what may be causing this kind of behaviour? Since that happened, the reception of bundles stopped working fine as it was on the first hour of tests. Thanks in advance, Guilherme Rolim

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