May 2014 - Ibr-dtn - lists.ibr.cs.tu-bs.de

IBR-DTN release 0.12.1
by Johannes Morgenroth 27 May '14

27 May '14

Patch release 0.12.1 is available! This release fixes a bug which lead to unnecessary transmissions on each contact. Beside several minor improvements, it also contains a new early duplicate check which should decrease traffic volume. The sources is available via the project Trac. For a full list of features and changes watch the official changelog: http://www.ibr.cs.tu-bs.de/trac/ibr-dtn/wiki/changelog The packages for Debian, Raspbian and OpenWrt are currently in our build queue and should be available very soon. Kind regards, Johannes Morgenroth

1 0

Using IP adress
by Ghada Jaber 23 May '14

23 May '14

Hi Instead of using the name of the node (dtn://name) , i want to use her IP adress to test dtnping or other tool ( dtnsend , dtnrecv ...) Can I ? If yes , how ? I mean how is the syntax ? Thank you Ghada Jaber Etudiante en 5eme année Réseau informatique et Telecommunication a l'INSAT Stagiaire a l'IRIT/ENSEEIHT Tel : 003385681703 email : jaberghada(a)yahoo.fr Skype : ghada.jaber90

5 10

IBR_DTN capabilities
by Tiago Condeixa 23 May '14

23 May '14

Hi, I have been trying to solve my problems from the feedback you gave me, but I have some questions yet. Priority: I am using the dtnsend tool with different priorities (0, 1 or 2) to send files from node1 to node3, using the relay node2. I sent 15 files of 2Mb in a loop with priority 0 and right after that I sent a file with priority 2. The files need some time to arrive the node3, and I expected that file with priority 2 arrives between the files with priority 0, but it arrives at the end of the 15 files. Do I need to activate something for priority or it is built-in in the ibr-dtn software? Does priority have any impact on the bundles storage when the bundles surpass the limit of storage? BAB authentication: I’m not able to start BAB authentication in OpenWRT. I’m using the same configurations in all the operative systems and the SecurityKeyManager doesn’t start on openWRT, so it is not a configuration problem but probably it is related with the compilation of IBR-DTN for OpenWRT. I analyzed the source and there are flag/defines “dtnsec” or “WITH_BUNDLE_SECURITY” that just compile the SecurityKey Manager part when the required libraries are available. I already installed more libraries in openwrt virtual machine, where I compile but it’s not working yet. My specifications are the following: Cambria: target System (INTEL IXP4XX) Openwrt: Backfire 10.03 IBR-DTN: 0.12.0 openssl-util = y PACKAGE_libopenssl = y Do you know if a need any other library?or other openWRT package? Thanks a lot, Tiago On 21 May 2014, at 11:00, ibr-dtn-request(a)ibr.cs.tu-bs.de wrote: > Send Ibr-dtn mailing list submissions to > ibr-dtn(a)ibr.cs.tu-bs.de > > To subscribe or unsubscribe via the World Wide Web, visit > https://mail.ibr.cs.tu-bs.de/listinfo/ibr-dtn > or, via email, send a message with subject or body 'help' to > ibr-dtn-request(a)ibr.cs.tu-bs.de > > You can reach the person managing the list at > ibr-dtn-owner(a)ibr.cs.tu-bs.de > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Ibr-dtn digest..." > > > Today's Topics: > > 1. IBR-DTN capabilities (Tiago Condeixa) > 2. Re: IBR-DTN capabilities (Johannes Morgenroth) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 20 May 2014 15:21:12 +0100 > From: Tiago Condeixa <tscondeixa(a)ua.pt> > To: <ibr-dtn(a)ibr.cs.tu-bs.de> > Subject: [ibr-dtn] IBR-DTN capabilities > Message-ID: <96F5EFF9-6F8F-4D6E-AB69-AC7B4B51D6EA(a)ua.pt> > Content-Type: text/plain; charset="windows-1252" > > Hi, > > I have been configuring and testing the IBR-DTN in a small testbed with 10 nodes (e.g. macbooks, ubuntu, openwrt boards), and latter I intend to put it in a larger scale testbed. I didn?t find any document explaining the IBR-DTN nor the tools, so I have some questions from the tests that I performed. I would really like to really understand current capabilities of IBR-DTN and then just modify what is necessary or just create new tools. > > - I activate the scheduling in the nodes and use dtnsend tool with priority option. However, I didn?t see any effect from priority in the file transferring speed nor in the limited bundles storage. Files with higher priority are not delivered first and bundles with lower priority are not deleted from disk to keep the higher priority bundles when the storage's limit is achieved in relay nodes. By the way, the configuration file of OpenWRT is not equal to the configuration file from the ubuntu/macbook daemon, and sometimes is difficult to know the options to configure. I have to activate the IBR-DTN as ?dtnd? directly and not with service ibrdtn start, because I didn?t find the option to active the scheduling there. I would like to exchange bundles with different priorities in my testbed, is this already built-in in IBR-DTN? > > - I also tried sending large files through dtnsend with --custody option activated, but I didn?t see any effect. When I shutdown a relay node or stop the ibrdtn during some seconds the file never arrives at the destination. I assume that with custody transfer, the transfer is assured and the source or the node with the custody retransmit again to the destination. Is this right? or there is any other purpose for custody transfers? > > - I also tried to activate the BAB authentication (level 1), but the SecurityKeyManager is not activated in the nodes with OpenWRT. There is any option to activate the BAB according to the required DTN service? This way some services can be used by any nodes in the DTN, while some services are just used by nodes with the authentication Key. > > > Thank you for your time, > Tiago > > ------------------------------ > > Message: 2 > Date: Tue, 20 May 2014 17:05:15 +0200 > From: Johannes Morgenroth <morgenroth(a)ibr.cs.tu-bs.de> > To: ibr-dtn(a)ibr.cs.tu-bs.de > Subject: Re: [ibr-dtn] IBR-DTN capabilities > Message-ID: <537B6F2B.5040506(a)ibr.cs.tu-bs.de> > Content-Type: text/plain; charset=windows-1252 > > Hi Tiago. > > Am 20.05.2014 16:21, schrieb Tiago Condeixa: >> - I activate the scheduling in the nodes and use dtnsend tool with priority option. However, I didn?t see any effect from priority in the file transferring speed nor in the limited bundles storage. Files with higher priority are not delivered first and bundles with lower priority are not deleted from disk to keep the higher priority bundles when the storage's limit is achieved in relay nodes. > > What do you expect from scheduling? The scheduling option (yes/no) is > not required for standard priorities as defined in the bundle protocol. > > Please read and understand how Priority Classes are defined in the DTN > and try to figure out if that is what you expect. > > http://tools.ietf.org/html/rfc4838#section-3.5 > >> By the way, the configuration file of OpenWRT is not equal to the > configuration file from the ubuntu/macbook daemon, and sometimes is > difficult to know the options to configure. I have to activate the > IBR-DTN as ?dtnd? directly and not with service ibrdtn start, because I > didn?t find the option to active the scheduling there. I would like to > exchange bundles with different priorities in my testbed, is this > already built-in in IBR-DTN? > > That is part of the integration in OpenWrt. > http://wiki.openwrt.org/de/doc/uci > > Since UCI is not available on all platforms there is no way to do > equally with that level of integration. You do not have to use it, if > you do not like it. > >> - I also tried sending large files through dtnsend with --custody option activated, but I didn?t see any effect. When I shutdown a relay node or stop the ibrdtn during some seconds the file never arrives at the destination. I assume that with custody transfer, the transfer is assured and the source or the node with the custody retransmit again to the destination. Is this right? or there is any other purpose for custody transfers? > > Custody does not change anything. > http://www.ietf.org/mail-archive/web/dtn-interest/current/msg04338.html > >> - I also tried to activate the BAB authentication (level 1), but the SecurityKeyManager is not activated in the nodes with OpenWRT. There is any option to activate the BAB according to the required DTN service? This way some services can be used by any nodes in the DTN, while some services are just used by nodes with the authentication Key. > > BAB authentication is working, even on OpenWrt (I tested it right now). > There must be an configuration issue on your side. > > Do you see a message like this in your logread on start-up of IBR-DTN? > > May 20 15:00:50 blueberry daemon.info ibrdtn-daemon[30002]: initialized; > path: /etc/ibrdtn/keys > > Then the SecurityManager is initialized. > > > Good luck! > Johannes > > > > ------------------------------ > > Subject: Digest Footer > > -- > !! 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://mail.ibr.cs.tu-bs.de/listinfo/ibr-dtn. > > ------------------------------ > > End of Ibr-dtn Digest, Vol 46, Issue 14 > ***************************************

2 1

Send a message for a group
by Farouk Mezghani 22 May '14

22 May '14

Hi all, Looking at the dtnsend command option, i found the option -g which can be used to send a message for a group. I am wondering how can I define a group. Example I have 4 machines( host1, host2, host3, and host4) 1. I want to send a message from host1 to host2 and host3. How can I do this ? 2. I want to broadcast the message for all my neighbors (host1 ==> hosts 2, 3 and 4) How can I broadcast.? I checked on IBR DTN documentation, but I found only how to send from one host to another one. Any help will be appreciated. Best regards, Farouk

2 1

dtnsend
by Ghada Jaber 22 May '14

22 May '14

HI I want to send files from one device to two others (broadcast) at the same time using dtnsend and dtnrecv but i didn't get the sytax . How can i do it please ? Thank you Ghada Jaber Etudiante en 5eme année Réseau informatique et Telecommunication a l'INSAT Stagiaire a l'IRIT/ENSEEIHT Tel : 003385681703 email : jaberghada(a)yahoo.fr Skype : ghada.jaber90

2 2

IBR-DTN capabilities
by Tiago Condeixa 20 May '14

20 May '14

Hi, I have been configuring and testing the IBR-DTN in a small testbed with 10 nodes (e.g. macbooks, ubuntu, openwrt boards), and latter I intend to put it in a larger scale testbed. I didn’t find any document explaining the IBR-DTN nor the tools, so I have some questions from the tests that I performed. I would really like to really understand current capabilities of IBR-DTN and then just modify what is necessary or just create new tools. - I activate the scheduling in the nodes and use dtnsend tool with priority option. However, I didn’t see any effect from priority in the file transferring speed nor in the limited bundles storage. Files with higher priority are not delivered first and bundles with lower priority are not deleted from disk to keep the higher priority bundles when the storage's limit is achieved in relay nodes. By the way, the configuration file of OpenWRT is not equal to the configuration file from the ubuntu/macbook daemon, and sometimes is difficult to know the options to configure. I have to activate the IBR-DTN as “dtnd” directly and not with service ibrdtn start, because I didn’t find the option to active the scheduling there. I would like to exchange bundles with different priorities in my testbed, is this already built-in in IBR-DTN? - I also tried sending large files through dtnsend with --custody option activated, but I didn’t see any effect. When I shutdown a relay node or stop the ibrdtn during some seconds the file never arrives at the destination. I assume that with custody transfer, the transfer is assured and the source or the node with the custody retransmit again to the destination. Is this right? or there is any other purpose for custody transfers? - I also tried to activate the BAB authentication (level 1), but the SecurityKeyManager is not activated in the nodes with OpenWRT. There is any option to activate the BAB according to the required DTN service? This way some services can be used by any nodes in the DTN, while some services are just used by nodes with the authentication Key. Thank you for your time, Tiago

2 1

exchange messages
by Ghada Jaber 19 May '14

19 May '14

Hi , Can someone please explain for me how users exchange messages in IBR-DTN ? And where this is implemented in the code ? To exchange files we use dtnsend and dtnrecv , can we for example exchange songs or other types of messages ? I really appreciate if someone could answer me . Thank you Ghada Jaber Etudiante en 5eme année Réseau informatique et Telecommunication a l'INSAT Stagiaire a l'IRIT/ENSEEIHT Tel : 003385681703 email : jaberghada(a)yahoo.fr Skype : ghada.jaber90

3 5

Discovery_message Period
by Farouk Mezghani 19 May '14

19 May '14

Hi all, I checked in IBR-DTN and I found that the discovery messages are exchanged periodically between neighbors each "1second". Is it possible to exchange this period from "1second" to "4 second" ? If yes, I appreciate if someone can tell me in what file I can find the parameter responsible for that. Best regards, Farouk

2 1

The relay do not deliver the bundles
by Luís Carlos Guedes 14 May '14

14 May '14

Hello, I have the following situation A (B) C. B transports the messages between A and C. In the first moment B has connection only with A and after only with C. I'm having a problem when I try to send one file from A to C (with a node B making the transport of the file). When i send a file from A, as much I can see in the directory /tmp/spool/ibrdtn/bundle of the node B, it receives the file. Then the node B goes until the connection with the node C and it should deliver the file sent previously from A but that does not happens. The deliver just happens if I restart the deamon of the relay (node B). Do you have some idea how to solve the problem without restart the deamon? Can it be about time synchronization? (I put in the configuration file one of the nodes as master and the others as slave) Thank you, Luís Guedes

2 1

Discovery message
by Ghada Jaber 14 May '14

14 May '14

Hi all, I have checked the discovery message used between dtn users. This message include Data which contains (user name, IP address, port number). I want to add, in the discovery message, another information "seq" which contains integer values. For instance seq=[2,5,0,6,8]. Thus, when receiving the discovery messages, i can see the sequences of my neighbors. Where can i add this ? In which class or method ? I am using an adhoc network connecting 3 machines. Thanks for your help, Best Regards, Ghada Ghada Jaber Etudiante en 5eme année Réseau informatique et Telecommunication a l'INSAT Stagiaire a l'IRIT/ENSEEIHT Tel : 003385681703 email : jaberghada(a)yahoo.fr Skype : ghada.jaber90

2 1