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

How Priority parameter works?
by Alex López 14 Jan '13

14 Jan '13

Hello, I'm trying to understand how the tool dtnsend (in openwrt) implements the priority option -p because I want to make some modifications into it and add some code that works in the same way. Reading the code, I've found that .../api/Bundle.ccp has the function "void Bundle::setPriority(Bundle::BUNDLE_PRIORITY p)" that changes the 2 priority bits of the bundle with b.set(dtn::data::Bundle::PRIORITY_BIT[1-2], [false or true]). And two other functions that return the priority depending of the bits: Bundle::BUNDLE_PRIORITY <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1api_…> Bundle::getPriority <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1api_…>() const { if (_b <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1api_…>.get <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1data…>(dtn::data::Bundle::PRIORITY_BIT1 <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1data…>)) { return PRIO_MEDIUM <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1api_…>; } if (_b <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1api_…>.get <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1data…>(dtn::data::Bundle::PRIORITY_BIT2 <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1data…>)) { return PRIO_HIGH <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1api_…>; } return PRIO_LOW <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1api_…>; } int MetaBundle::getPriority <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1data…>() const00059 {00060 // read priority00061 if (procflags <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1data…> & dtn::data::Bundle::PRIORITY_BIT1 <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1data…>)00062 {00063 return 0;00064 }00065 00066 if (procflags <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1data…> & dtn::data::Bundle::PRIORITY_BIT2 <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1data…>)00067 {00068 return 1;00069 }00070 00071 return -1;00072 } Whats the meaning of this two similar functions? Whats the idea of adding procflags in the condition? On another hand, what I want to know is how the DTN node processes this priority info. For example. If you first send a file with -p 1 (normal), after this, another one with -p 0 (low) and last, another one with -p 1 (normal). If everything goes well, the last one should be shipped before the one with priority -p 0. Where is this algorithm implemented in the code? I tried to find it but the only part of the code that shows something relevant about this is in daemon/src/storage/MemoryBundleStorage.h: private:00111 ibrcommon::Mutex <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classibrcommon_1…> _bundleslock;00112 std::set<dtn::data::Bundle> _bundles;00113 00114 struct CMP_BUNDLE_PRIORITY00115 {00116 bool operator() (const dtn::data::MetaBundle <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1data…>& lhs, const dtn::data::MetaBundle <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1data…>& rhs) const00117 {00118 if (lhs.getPriority <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1data…>() == rhs.getPriority <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1data…>())00119 return rhs > lhs;00120 00121 return (lhs.getPriority <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1data…>() > rhs.getPriority <https://www.ibr.cs.tu-bs.de/projects/ibr-dtn/doxygen/0.8.0/classdtn_1_1data…>());00122 }00123 };00124 00125 std::set<dtn::data::MetaBundle, CMP_BUNDLE_PRIORITY> _priority_index;00126 std::map<dtn::data::BundleID, ssize_t> _bundle_lengths;00127 00128 size_t _maxsize;00129 size_t _currentsize; But I dont't really understand how the change in the "storage queue"is done depending if a file has a higher or a lower priority than others that are in this queue. Where in the code is the queue of files stored in the dtn node and who send them? What means rhs and lhs? Thank you in advance. -- Alex Lopez

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Discovery address
by Dimitrios Giotas 20 Dec '12

20 Dec '12

Hello, I was going through the configuration file and I had some problems understanding what the discovery announcements address is about? The default address is 224.0.0.1. Could someone please explain it a bit more thoroughly? Thank you.

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FW: Urgent part2 - Dtn2 and ibr-dtn
by Carlos Neves 18 Dec '12

18 Dec '12

Grato pela Vossa ajuda,Com os melhores cumprimentos Carlos Neves - Communication Networks Engineering From: cneves777(a)hotmail.com To: cneves777(a)hotmail.com Subject: RE: Urgent part2 - Dtn2 and ibr-dtn Date: Sun, 16 Dec 2012 04:12:35 +0000 I cant do the streaming of video with andre---ibr-dtn2-ibr----carlos."carlos" sends the movie to "andre". Carlos have received the bundles but cant see any part of the video streaming.I've got fragmentation = yes.What is the problem?I'm using dtnstream... and ' cant see videostreaming (when i have big files). Grato pela Vossa ajuda,Com os melhores cumprimentos Carlos Neves - Communication Networks Engineering > Subject: Re: Urgent part2 - Dtn2 and ibr-dtn > From: morgenroth(a)ibr.cs.tu-bs.de > To: cneves777(a)hotmail.com > CC: ibr-dtn(a)ibr.cs.tu-bs.de > Date: Fri, 14 Dec 2012 07:55:08 +0100 > > Good morning! > > The parameter --badclock is only required if the clocks of the nodes are > not in sync and this approach has not been tested with DTN2 and might > result in expiring bundles! It is better to leave this out. > > Dtnping is working with DTN2, IBR-DTN and any combination of them. > Important here is to address the right endpoint. IBR-DTN has ".../echo" > and DTN2 has ".../ping". > > If that is not enough to get your setup working, you should sent me at > least the log output of all the daemon (IBR-DTN AND DTN2). > > Kind regards, > Johannes > > > -------- Weitergeleitete Nachricht -------- > Von: Carlos Neves <cneves777(a)hotmail.com> > An: morgenroth(a)ibr.cs.tu-bs.de > Betreff: Urgent part2 - Dtn2 and ibr-dtn > Datum: Fri, 14 Dec 2012 00:13:03 +0000 > > Hi again. > We have try all afternoon and nothing. > > I have this network configuration: > > dtn://carlos.dtn (IBR-DTN) -------------- dtn://alameda (IBR-DTN) > ------------------ dtn://gateway (DTN2) > 192.168.3.19 192.168.3.1| > 192.168.6.1 > 192.168.6.254 ..... > > > discovery_version=0 > discovery_version=0 ???http://www.dtnrg.org/wiki/DraftAutodiscoveryCode??? > > If i'am in dtn://gateway.dtn > I received the bundles from dtn://carlos.dtn to dtn://gateway.dtn > BUT the bundle the bundle get expired because they reach to DTN2 with > expiration=0 > > we are starting the daemon's of ibr dtn with the arg --badclock i guess > is related right? > What should we do? > > Also is it possible to ping from dtn2 (dtnping) and ibr-dtn(dtnping) ? > i'm not sure... > if you manage to that let us know ! :) >

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Re: [ibr-dtn] ibr-dtn ping
by Sebastian Schildt 17 Dec '12

17 Dec '12

I mean your system's search path. echo $PATH . Probably the path where you installed dtn2 is in there (first). If you don't have experience with Linux based systems, uninstalling DTN2 might be the easiest solution. Dimitrios Giotas <dimigiotas(a)gmail.com> wrote: >Thanks for your reply. > >Could you also tell me how to check my path.The only path I know that >is >about ibr-dtn is the /etc/ibrdtn which contains the conf file.Other >than >that I can't find anything relevant. > >Thank you, >Dimitris > > >On Mon, Dec 17, 2012 at 8:47 PM, Sebastian Schildt ><schildt(a)ibr.cs.tu-bs.de>wrote: > >> Probably you are trying to run the DTN2 version of dtnping with >IBR-DTN. >> This can not work. Make sure you start IBR-DTNs dtnping binary. >(Check your >> PATH) >> >> Dimitrios Giotas <dimigiotas(a)gmail.com> wrote: >>> >>> Hello, >>> >>> I have the dtn daemon installed on my pc.First I want to send a ping >from >>> the daemon to itself. >>> I have used both the default configuration file and a modified one >I'm >>> going to need for a future task. >>> >>> So I have the deamon running on one terminal and on another terminal >I >>> write >>> dtnping dtn://dimitrishp.dtn/echo in order to send the ping. >>> >>> Although the daemon seems to be running fine with both files, I >always >>> get the same error : >>> fatal error opening dtn handle: error in ipc communication >>> Any ideas how to get it fixed? >>> >>> Thank you, >>> Dimitris >>> >>> -- >>> !! This message is brought to you via the `ibr-dtn' mailing list. >>> !! Please do not reply to this message to unsubscribe. To >unsubscribe or adjust >>> !! your settings, send a mail message to ><ibr-dtn-request(a)ibr.cs.tu-bs.de> >>> !! or look at https://www.ibr.cs.tu-bs.de/mailman/listinfo/ibr-dtn. >>> >>> >> -- >> Sent from my Android phone with K-9 Mail. Please excuse my brevity. >> -- Sent from my Android phone with K-9 Mail. Please excuse my brevity.

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ibr-dtn ping
by Dimitrios Giotas 17 Dec '12

17 Dec '12

Hello, I have the dtn daemon installed on my pc.First I want to send a ping from the daemon to itself. I have used both the default configuration file and a modified one I'm going to need for a future task. So I have the deamon running on one terminal and on another terminal I write dtnping dtn://dimitrishp.dtn/echo in order to send the ping. Although the daemon seems to be running fine with both files, I always get the same error : fatal error opening dtn handle: error in ipc communication Any ideas how to get it fixed? Thank you, Dimitris

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Re: [ibr-dtn] Urgent part2 - Dtn2 and ibr-dtn
by Johannes Morgenroth 14 Dec '12

14 Dec '12

Good morning! The parameter --badclock is only required if the clocks of the nodes are not in sync and this approach has not been tested with DTN2 and might result in expiring bundles! It is better to leave this out. Dtnping is working with DTN2, IBR-DTN and any combination of them. Important here is to address the right endpoint. IBR-DTN has ".../echo" and DTN2 has ".../ping". If that is not enough to get your setup working, you should sent me at least the log output of all the daemon (IBR-DTN AND DTN2). Kind regards, Johannes -------- Weitergeleitete Nachricht -------- Von: Carlos Neves <cneves777(a)hotmail.com> An: morgenroth(a)ibr.cs.tu-bs.de Betreff: Urgent part2 - Dtn2 and ibr-dtn Datum: Fri, 14 Dec 2012 00:13:03 +0000 Hi again. We have try all afternoon and nothing. I have this network configuration: dtn://carlos.dtn (IBR-DTN) -------------- dtn://alameda (IBR-DTN) ------------------ dtn://gateway (DTN2) 192.168.3.19 192.168.3.1| 192.168.6.1 192.168.6.254 ..... discovery_version=0 discovery_version=0 ???http://www.dtnrg.org/wiki/DraftAutodiscoveryCode??? If i'am in dtn://gateway.dtn I received the bundles from dtn://carlos.dtn to dtn://gateway.dtn BUT the bundle the bundle get expired because they reach to DTN2 with expiration=0 we are starting the daemon's of ibr dtn with the arg --badclock i guess is related right? What should we do? Also is it possible to ping from dtn2 (dtnping) and ibr-dtn(dtnping) ? i'm not sure... if you manage to that let us know ! :)

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SQLiteBundleStorage version issues
by Carson Dunbar 13 Dec '12

13 Dec '12

Hello, I am trying to implement the SQLite Bundle storage mechanism in IBR-DTN and I'm running into issues that I did not have with the 0.6.4 release of IBR-DTN. Right now whenever I try to run dtnd, the output says that I am running version 0 and I need to upgrade to 1. I never get a print out saying what version I'm using as in this line below IBRCOMMON_LOGGER(info) << "SQLiteDatabaseNC: Database version " << version << " found." << IBRCOMMON_LOGGER_ENDL; I believe means this that the code is getting sent to the catch for the doUpgrade(0, DBSCHEMA_VERSION). Are there any reasons you can think of as to why I would get this result? I have the latest version of sqlite installed from the Ubuntu repositories. Thanks, Carson

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Re: [ibr-dtn] Urgent --- Dtn2 and ibr-dtn
by Johannes Morgenroth 13 Dec '12

13 Dec '12

Hello Carlos. As written in your other mail you already set discovery_version = 0. This is right if you want to do neighbor discovery with DTN2. How this is can be configured in DTN2 is documented here: http://www.dtnrg.org/wiki/DraftAutodiscoveryCode Alternative to that, you can configure a static route in IBR-DTN with: static1_uri = dtn://<dtn-name-of-the-other-node> static1_proto = tcp static1_address = <ip-of-the-other-node> static1_port = <port-of-the-other-node> (e.g. 4556) Kind regards, Johannes -------- Weitergeleitete Nachricht -------- Von: Carlos Neves <cneves777(a)hotmail.com> An: morgenro(a)ibr.cs.tu-bs.de, schildt(a)ibr.cs.tu-bs.de Betreff: Urgent --- Dtn2 and ibr-dtn Datum: Thu, 13 Dec 2012 11:10:15 +0000 Hello. We my team is trying to do videostreaming with dtn2 and ibr-dtn (is a specific project of investigation). I have dtn2 configurated and ibr-dtn configurated. I can do pings with (dtn2--dtn2) and (ibr-dtn--ibr-dtn). My problem is i cant do a ping using (dtn2--> ibr-dtn) or (ibr-dtn --> dtn2). Can you help me? I know its possible, but i'm stuked in this like 3 weeks and we have to submit the project tomorrow. Can you help us? Can you give some code or some tips? We kwon this is possible because we see there http://www.dtnrg.org/wiki/DtnBone IBR-DTN is interoperable with compliant TCP CL and UDP CL implementations. Grato pela Vossa ajuda, Com os melhores cumprimentos Carlos Neves - Communication Networks Engineering

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ibr-dtn commands
by Dimitrios Giotas 12 Dec '12

12 Dec '12

Hello, I have a few questions about the ibr-dtn commands.I have only recently started experimenting with ibr-dtn on my pc and router. I have familiarized myself with the dtn2 daemon and I was wondering if the same command formats apply to both daemons, since ibr-dtn is based on dtn2.More specifically I am currently insterested in the basic commands dtnping,dtnsend and dtnrecv. Will the ibr-dtn daemon accept the dtn2 format of these commands? Thank you, Dimitris.

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NeighborRoutingExtension issues
by Carson Dunbar 11 Dec '12

11 Dec '12

Hello, I am currently trying to implement my network coding router in IBR-DTN and I'm having some issues with the 0.8.0 version that didn't occur in the 0.6.4 version. Whenever I try to send out my nullspace bundles to nil://ausgezeichnet, the NeighborRoutingExtension is bouncing them back at the source of the bundle. I don't remember this happening with my nearly identical code in the 0.6.4 version of ibr-dtnd. I see the bundle filter in that extension has changed to include the Singleton identifier, which wasn't in the old version. Is this why my bundles are being reflected? Thanks Carson Dunbar

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