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

I can't build IBR-DTN daemon for Android
by Yoshimi Fujii 31 Aug '12

31 Aug '12

Hi I'm trying to build IBR-DTN daemon and applications with Eclipse from Java sources on your subversion repository. I successfully built all the components except for the daemon. It requires ibrdtnlib, which seems missing on the repository. After that, I found it on the repository outside Android project. However, I don't know how to include it into the Android project. Eclipse doesn't recognize ibrdtnlib as a project. Could you help me again? Best Regards, -- Yoshimi Fujii Kozo Keikaku Engineering, Inc. Email: yfujii(a)kke.co.jp Tel: +81 3 5342 1129

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Memory only storage vs. Disk storage
by Carson Dunbar 29 Aug '12

29 Aug '12

Hello, Now that my code has started to work in the memory-only mode of IBR-DTN I went on to testing it with the disk-based storage, which I assume I activated because I entered in some directories for the bundles to be stored in, in the config file. IBR-DTN also acknowledged that it was using simple storage. When I started it though, the program basically froze the first time I tried to interact with a bundle, whereas it was fine in memory only mode. The conditions that caused this were as follows: 1. I got a bundle from storage in the queuebundleevent, checked if it was a bundle I put in though dtnsend, and forward it to an event handler in the router. 2. I again check for some more bundle issues in the event handler, then send the bundle forward again to another function that will basically split up the bundle 3. In my function I attempt to create a DefaultSerializer using a blank blob reference and stream the bundle into it. The last step is where my function is failing. The output is giving me an exception that says that the output stream went bad and 0 out of the 49000 bytes in my original bundle were read. Any ideas as to why this is happening only in the simple storage and not memory only? Below is a code segment that shows what i am doing. Thank you. Carson Dunbar u_int32_t NCRoutingExtension::generate_and_enqueue_encodings(dtn::data::Bundle bundle, u_int32_t max_chunk_size) { // start with just the standard basis, i.e. fragmentation // need to figure out the number of chunks that will be created // still requiring the number of chunks to be a multiple of 8? // let's try to not require it // dtn::core::BundleStorage &storage = (**this).getStorage(); u_int32_t num_chunks, chunk_size; size_t orig_bundle_len = 0; size_t block_len; ibrcommon::BLOB::Reference ref = ibrcommon::BLOB::create(); dtn::data::DefaultSerializer serializer(*ref.iostream()); try { // activate exceptions for this method if (!ref.iostream()->good()) throw ibrcommon::IOException("stream went bad"); serializer << (bundle); // flush the stream (*ref.iostream()) << std::flush; } catch (const ibrcommon::Exception &ex) { IBRCOMMON_LOGGER_DEBUG(10) << ex.what() << IBRCOMMON_LOGGER_ENDL; throw; }

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API documents?
by Yoshimi Fujii 29 Aug '12

29 Aug '12

Hi, I'm a newbie at this mailing list. Now I'm trying to write a small applications for IBR-DTN runs on AndroidOS and Linux. However I can't find any documentations about the API. Would you tell me how can I get such documemtations or information source about the API? Thanks, Yoshimi Fujii -- Yoshimi Fujii Kozo Keikaku Engineering, Inc. Email: yfujii(a)kke.co.jp Tel: +81 3 5342 1129

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Changing included libraries in ibr-dtnd
by Carson Dunbar 23 Aug '12

23 Aug '12

Hello Johannes, I am currently trying to include the m4ri library into ibrdtnd for my new router and I was wondering what the best way to go about that is. I realize I could make an option as the best solution to this problem, but I just need a quick fix that allows me to configure and make the files without destroying any changes I make to the Makefile. Do you know where I can include the option -lm4ri so that I can get access to this library? Thanks, Carson

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Faça parte da minha rede no LinkedIn
by Felipe Pereira 11 Aug '12

11 Aug '12

LinkedIn ------------ Eu gostaria de adicioná-lo à minha rede profissional no LinkedIn. -Felipe Felipe Pereira Estagiário na Centro de Tecnologia da Informação e Comunicação - UFPA Belém e Região, Brasil Confirme que você conhece Felipe Pereira: https://www.linkedin.com/e/bb3nk5-h5qzgmut-2f/isd/6044472315/Dy-pwZJR/?hs=f… -- Você está recebendo convites de conexão por e-mail. Clique aqui para parar de recebê-los: http://www.linkedin.com/e/bb3nk5-h5qzgmut-2f/BTZwlPJnvWF8RoDLsSum0ULkz5sLfX… (c) 2012 LinkedIn Corporation. 2029 Stierlin Ct, Mountain View, CA 94043 - EUA.

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Previous Hop Information for IBR-DTN
by Carson Dunbar 07 Aug '12

07 Aug '12

Hello, I am currently implementing a newer version of the EBR network coding router in IBR-DTN and one of the requirements is to keep track of when and from whom I got my last bundles from. Does IBR-DTN keep track of the previous hops for each of the bundles? Do forwarded bundles update with new information in intermediate nodes? Thank you. Carson Dunbar

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Re: [ibr-dtn] Large file transfer fails
by Johannes Morgenroth 20 Jun '12

20 Jun '12

Hello again. The logs tell me that the tcp connection has been closed by the dtn application. What about the RAM of the Machines? The dtnrecv application loads the whole bundle into the memory and AFTER that it puts the payload into the file or print it out. Was node 2 out of memory during the receive call? Kind regards, Johannes Am 20.06.2012 14:15, schrieb Sergey Sireskin: > Hi Johannes. > > Both nodes are HVM Xen virtual machines. Xen host runs CentOS 5.5, linux kernel 2.6.18-194.3.1.el5xen > on an IBM System x 3550 server with Intel Xeon E5530 CPU. Nodes run RHEL 6 based OS, linux kernel > 2.6.32-131.0.15.el6_x86_64. > > IBR-DTN version 0.8.0 was compiled on the nodes with GCC 4.4.5. > > Here is ldd output for dtnd: > ldd /usr/local/sbin/dtnd > linux-vdso.so.1 => (0x00007fff8a7ff000) > libibrdtn-0.8.so.1 => /usr/local/lib/libibrdtn-0.8.so.1 > (0x00007f90ed16c000) > libibrcommon-0.8.so.1 => /usr/local/lib/libibrcommon-0.8.so.1 > (0x00007f90ecef8000) > libssl.so.10 => /usr/lib64/libssl.so.10 (0x0000003e8de00000) > libcrypto.so.10 => /usr/lib64/libcrypto.so.10 (0x0000003e8b600000) > libdl.so.2 => /lib64/libdl.so.2 (0x0000003f42200000) > libz.so.1 => /lib64/libz.so.1 (0x0000003e83e00000) > libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003e83600000) > librt.so.1 => /lib64/librt.so.1 (0x0000003e84200000) > libstdc++.so.6 => /usr/lib64/libstdc++.so.6 (0x0000003e86a00000) > libm.so.6 => /lib64/libm.so.6 (0x0000003e83a00000) > libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x0000003e86600000) > libc.so.6 => /lib64/libc.so.6 (0x0000003e83200000) > libgssapi_krb5.so.2 => /lib64/libgssapi_krb5.so.2 (0x0000003e8be00000) > libkrb5.so.3 => /lib64/libkrb5.so.3 (0x0000003e89a00000) > libcom_err.so.2 => /lib64/libcom_err.so.2 (0x0000003e87a00000) > libk5crypto.so.3 => /lib64/libk5crypto.so.3 (0x0000003e8aa00000) > libresolv.so.2 => /lib64/libresolv.so.2 (0x0000003e85200000) > /lib64/ld-linux-x86-64.so.2 (0x0000003e82a00000) > libkrb5support.so.0 => /lib64/libkrb5support.so.0 (0x0000003e8a200000) > libkeyutils.so.1 => /lib64/libkeyutils.so.1 (0x0000003e8a600000) > libselinux.so.1 => /lib64/libselinux.so.1 (0x0000003e84600000) > > Best regards, > Sergey Sireskin > > Wed, 20 Jun 2012 13:25:08 +0200 от Johannes Morgenroth <morgenro(a)ibr.cs.tu-bs.de>: >> Hi Sergey. >> >> I've tested a 1.3G filetransfer with two daemons and can not reproduce >> your issue with my nodes. Please tell me more details about your system >> (software / hardware, if special) you used and send me the logfiles of >> the daemons. For a better analysis of what happens here, I need logfiles >> with enabled debugging. Parameter "-d 99" on startup. >> >> Kind regards, >> Johannes >> >> >> Am 19.06.2012 16:07, schrieb Sergey Sireskin: >>> I am unable to send a large (~ 1.3GB file) between two directly connected nodes. >>> Free disk space on both nodes is about 6GB. >>> On the receiving node dtn://node-2.domain I start dtnrecv --name file --file /tmp/1.iso. >>> On the sending node dtn://node-1.domain I start dtnsend dtn://node-2.domain/file ./1.iso. >>> The file is successfully transferred to the receiving node and is stored as a bundle, then it >>> is being transferred to dtnrecv, as I suppose. After some time I get the following error: >>> >>> dtnrecv --name file --file /tmp/1.iso >>> Wait for incoming bundle... >>> Aborted. -- Johannes Morgenroth Institut fuer Betriebssysteme und Rechnerverbund Tel.: +49-531-391-3249 Muehlenpfordtstrasse 23 Fax.: +49-531-391-5936 TU Braunschweig D-38106 Braunschweig

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Large file transfer fails
by Sergey Sireskin 20 Jun '12

20 Jun '12

Hi all, I am unable to send a large (~ 1.3GB file) between two directly connected nodes. Free disk space on both nodes is about 6GB. On the receiving node dtn://node-2.domain I start dtnrecv --name file --file /tmp/1.iso. On the sending node dtn://node-1.domain I start dtnsend dtn://node-2.domain/file ./1.iso. The file is successfully transferred to the receiving node and is stored as a bundle, then it is being transferred to dtnrecv, as I suppose. After some time I get the following error: dtnrecv --name file --file /tmp/1.iso Wait for incoming bundle... Aborted. Here is the configuration of node-1 (node-2 is similar): logfile = /var/log/ibrdtn.log timezone = +3 limit_blocksize = 0 user = dtnd blob_path = /var/spool/dtnd/blobs storage_path = /var/spool/dtnd/bundles limit_storage = 5G discovery_announce = 0 net_interfaces = eth0 net_rebind = yes net_autoconnect = 60 net_eth0_type = tcp net_eth0_interface = eth0 net_eth0_port = 4556 net_eth0_discovery = yes routing_forwarding = yes static1_address = 192.168.150.39 static1_port = 4556 static1_uri = dtn://node-2.domain static1_proto = tcp static1_immediately = yes dht_enabled = yes Best regards, Sergey Sireskin

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IBR-DTN release 0.8.0
by Johannes Morgenroth 15 Jun '12

15 Jun '12

Hurray, a new release of IBR-DTN is available! Great features are: * PRoPHET Routing * DHT-based EID resolution / routing * Reactive Fragmentation support in TCPCL * Extended plaintext API (+ Java library) * and many more... The full changelog is available at: http://www.ibr.cs.tu-bs.de/trac/ibr-dtn/wiki/changelog Packages and install procedures are available for: - Ubuntu (9.04 and higher) / Debian (5.0 / 6.0) - OpenWRT Backfire 10.03.1 (x86 / ar71xx) - MacOS X (MacPorts) Additionally, we released *IBR-DTN for Android* to the Google Play Store. An API library and a how-to for the development of own DTN applications for smart-phones are available in the project wiki. But first you can play with two cool DTN Apps: Whisper and Talkie. For more information visit this page: http://www.ibr.cs.tu-bs.de/projects/ibr-dtn/ Kind regards, Johannes -- Johannes Morgenroth Institut fuer Betriebssysteme und Rechnerverbund Tel.: +49-531-391-3249 Muehlenpfordtstrasse 23 Fax.: +49-531-391-5936 TU Braunschweig D-38106 Braunschweig

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Temporary vs. Persistent Storage in IBR-DTN
by gjohnson＠ltsnet.net 07 Jun '12

07 Jun '12

Hello, The storage configuration section of the IBR-DTN configuration file allows you to define folders for temporary and persistent storage of bundles. When will a bundle be stored in temporary storage vs. persistent storage? When are bundles removed from these storage locations? Thanks, Gleneesha

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