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

dtninbox command
by Theodoros Bourchas 06 Jun '14

06 Jun '14

Hi, I am testing IBR-DTN features and I would like to transmit big amount of data between wireless nodes. The devices that I use are TP-LINK 3040 v:2.x , flushed with OpenWRT and IBR-DTN 0.13.0-335. Due to insufficient memory space, I have performed an extroot, using a USB storage(32GB). root@OpenWrt:~# df Filesystem 1K-blocks Used Available Use% Mounted on rootfs 30642708 9891116 19188328 34% / /dev/root 2048 2048 0 100% /rom tmpfs 14452 528 13924 4% /tmp /dev/sda1 30642708 9891116 19188328 34% /overlay overlayfs:/overlay 30642708 9891116 19188328 34% / tmpfs 512 0 512 0% /dev I have formatted my USB storage in ext3 format (mkfs.ext3 /dev/sda1) I have changed the configuration file in both sender and receiver, so the bundles and the blobs path to be under /overlay. config daemon 'main' option uri 'dtn://host12' option logfile '/overlay/TMP/ibrdtn.log' option errfile '/overlay/TMP/ibrdtn.err' option fragmentation 'yes' option scheduling 'yes' option routing 'epidemic' config daemon 'safemode' option forwarding 'no' option storage '64M' option maxblock '16M' config daemon 'storage' option engine 'simple' option blobs '/overlay/TMP/blobs' option bundles '/overlay/TMP/bundles' I am trying to send a 100MB file, between two nodes. I have synchronized the clocks of the two nodes and: @Sender: 1) tar -cf file.tar file 2) dtnsend dtn://hostX/inboxReceiver file.tar I can see the bundle of 100M created @ sender @Receiver: 3)dtninbox -w /overlay/inboxFolder /overlay/Folder I can see the entire bundle received correctly under /overlay/TMP/bundles, but when I run the above command, after some time a message "Killed" is appeared. As a result, part of the whole bundle is received (around 10-11 MB), while under /overlay/inboxFolder I can see a blob with the entire size of 100MB. I would be grateful if you had any hint about this behavior and how I can fix it. Thanks in advance, Theodoros

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cannot DTNping when use static routing
by magda lena 06 Jun '14

06 Jun '14

hello, okay i will try it soon and report to you if any error appear thanks :) Hi. > > You have disabled dynamic routing completely on nodeA. Thus, even direct > delivery is not performed in this case. Without any additional static > route nodeA does not know how to route bundles for nodeB. > > I assume dtnping is working if you ping from nodeA to nodeC, right? > > To allow nodeA to ping even nodeB, you need to add an additional route > to the configuration of nodeA. > > route2 = dtn://nodeB.dtn/* dtn://nodeB.dtn > > Alternatively, you can define one route to send all traffic through nodeB. > > route1 = dtn://* dtn://nodeB.dtn > > Kind regards, > Johannes > >

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cannot DTNping when use static routing
by magda lena 06 Jun '14

06 Jun '14

i chmod 777 the /tmp/blob and got no error anymore :) but the problem is i still cannot dtnping, it always say timeout when i try to dtnping. i will try to explain my configuration 1. i have nodeA, nodeB and nodeC 2. when i did not use routing nodeA-nodeB-nodeC can dtnping each other (with adhoc network) 3. i want to dtnping from nodeA to nodeC via nodeB 4. so i have this configuration (as you suggest before) *nodeA (ubuntu) :* limit_blocksize = 1.5G limit_predated_timestamp = 604800 limit_lifetime = 604800 api_interface = any fragmentation =yes blob_path = /tmp/blob/ storage_path = /home/trie/ibrdtn/bundles storage = default limit_storage = 2.5G #dht_enabled = yes routing = none routing_forwarding = yes route1 = dtn://nodeC.dtn/* dtn://nodeB.dtn time_reference = no time_synchronize = yes time_discovery_announcements = yes *nodeB (raspberry pi) :* limit_blocksize = 1.5G limit_predated_timestamp = 604800 limit_lifetime = 604800 api_interface = any fragmentation =yes blob_path = /tmp/blob/ storage_path = /home/trie/ibrdtn/bundles storage = default limit_storage = 2.5G #dht_enabled = yes routing = default routing_forwarding = yes time_reference = yes time_discovery_announcements = yes *nodeC (ubuntu) :* limit_blocksize = 1.5G limit_predated_timestamp = 604800 limit_lifetime = 604800 api_interface = any fragmentation =yes blob_path = /tmp/blob/ storage_path = /home/trie/ibrdtn/bundles storage = default limit_storage = 2.5G #dht_enabled = yes routing = default routing_forwarding = yes route1 = dtn://nodeA.dtn/* dtn://nodeB.dtn time_reference = no time_synchronize = yes time_discovery_announcements = yes 5. and i start ibrdtn using "dtnd -i wlan0 -c /etc/ibrdtn/ibrdtnd.conf -c" 6. when i try this from nodeA : dtnping dtn://nodeB/echo it still got 'timeout' and vice versa 7. did i miss something in my configuration ? thanks for helping me to fix my problem :) This means that the directory is owned by user root and only writable > for user root. If you are launching `dtnd` as any other user, there will > be insufficient permission. You can delete the directory (as root) and > re-create it as a user. Another option could be to use chown/chgrp or > set mode 777 for the directory... > > If you are starting as root, then you can ignore this mail since I have > no idea what could be wrong... >

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problems changing the makefile/configure
by Tiago Condeixa 03 Jun '14

03 Jun '14

Hi, I have creating a new ibr-dtn tool like dtnsend but It is difficult for me to understand where should I include it in Makefiles or configures, because I’m not used to work with complex makefiles or automakes. I already tried to included it in several places, but it’s not working. Can you help me to know where should I include my *.cpp files for ibrdtn-tools compilation? I already have the source code in my pc and I comment the wget and tar lines of bash script not to replace my new code. I have also a tool in a server to receive data from my other ibrdtn nodes and then I introduce my information in a mysql database directly when I receive a bundle. However, I have being also problems including the mysql -libs and -cflags. When I compile a simple c++ program to introduce information in mysql database I have to include at least -lmysqlclient (g++ -o program program.cpp -lmysqlclient). I also tried to include mysqlclient in several places, but it’s not working. Can you help me to know where to include it? Thanks a lot, Tiago

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error ibrcommon::IOException
by magda lena 02 Jun '14

02 Jun '14

Hello, i try to enabled time-synchronization like you told me before. but i still got the same error (bundle received-queued-deleted-expired) i think i must enable the blob path, but when i enable it blob_path = /tmp/blob/ i still got the same error "could not create a temporary file" it is affected by the directory's ownership or permissions this ls -l /tmp/ outcome drwxr-xr-x 2 root root 4096 Jun 2 14.05 blob ? or there is another option to fix this error ? thank you :) Hello. > > Am 30.05.2014 15:37, schrieb Stephan Rottmann: > > another option is to enable the dtn timesync in the config, but > > johannes/the documentation knows better about this... > > To enable time-synchronization, you need to declare at least one node as > reference. At best, this is a host with NTP synchronization. These are > the configuration parameters... > > time_reference = yes > time_discovery_announcements = yes > > The other nodes (non-references) must be configured this way... > > time_reference = no > time_synchronize = yes > time_discovery_announcements = yes > > > Kind regards, > Johannes Morgenroth >

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error ibrcommon::IOException
by magda lena 01 Jun '14

01 Jun '14

helo, > Does the path /tmp/blob/ exists? > If not create it. > > If yes, try to disable (comment-out) blob_path and tell me if the error > is still there. > i comment out the blob path and the error message disappear. but i got 'timeout' when i try to dtnping. and the notice seems repeating this : - new bundle queued - bundle deleted - bundle has been expired - bundle received it repeated again and again and dtnping still timeout. thank you :)

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error ibrcommon::IOException
by magda lena 30 May '14

30 May '14

Thanks for replying my question. 2014-05-30 20:37 GMT+07:00 Stephan Rottmann <rottmann(a)ibr.cs.tu-bs.de>: > Hi, > > > > > > - new bundle queued > > > > - bundle deleted > > > > - bundle has been expired > > > > - bundle received > > > does the expired message appear instantly? does it say the bundle was > refused? if so, check the time/date setting an all machines. you can try > to add the parameter --lifetime 7200 or so(i think, can't check it right > now)... > > what about the other side? can you ping your local daemon? > > another option is to enable the dtn timesync in the config, but > johannes/the documentation knows better about this... > > regards, > Stephan > > >

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error ibrcommon::IOException
by magda lena 30 May '14

30 May '14

Hi, Thanks for replying my question. yes, the message "received-bundle queued-bundle expired-bundle deleted" appear instantly in the notice log when the dtnping start it doesn't say that the bundle refused, just repeating received-queued-expired-deleted message and got timeout for dtnping. yes, i also check the date/time and it was same for all my machines i try to add --lifetime parameter and the message still appear(same with before) on the other side (my raspi) when it dtnping to my ubuntu, it got exactly the same message. but both node can dtnping its local daemon i want to try enable the timesync but i dont know which one of the time config that i can enable. Hi, > > > > > > - new bundle queued > > > > - bundle deleted > > > > - bundle has been expired > > > > - bundle received > > > does the expired message appear instantly? does it say the bundle was > refused? if so, check the time/date setting an all machines. you can try > to add the parameter --lifetime 7200 or so(i think, can't check it right > now)... > > what about the other side? can you ping your local daemon? > > another option is to enable the dtn timesync in the config, but > johannes/the documentation knows better about this... > > regards, > Stephan > > >

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Memory usage of IBR-DTN
by Romeu Monteiro 28 May '14

28 May '14

Hi, We are testing IBR-DTN in a vehicular testbed with On Board Units of limited resources and we have seen that IBR-DTN uses little CPU (around 2/3%) but a lot of virtual memory (from 84% to 140%, for instance). An example: Mem: 45096K used, 16084K free, 0K shrd, 412K buff, 19996K cached CPU: 2% usr 4% sys 0% nic 92% idle 0% io 0% irq 0% sirq Load average: 0.15 0.12 0.13 2/87 21145 PID PPID USER STAT VSZ %VSZ %CPU COMMAND 1090 1 root S 61148 107% 2% dtnd -c /etc/ibrdtnd_rsu.conf We have seen IBR-DTN (dtnd) use around 59MB of RAM from a total of 128MB, which is a lot for our devices. We are trying to mitigate this problem. Do you have any idea of what might be causing IBR-DTN to use so much memory and if we can do something to reduce this usage, or is this just the way it goes and there's little or nothing we can do about it? Thank you, Romeu

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error ibrcommon::IOException
by magda lena 28 May '14

28 May '14

helo, > Does the path /tmp/blob/ exists? > If not create it. > > If yes, try to disable (comment-out) blob_path and tell me if the error > is still there. > i comment out the blob path and the error message disappear. but i got 'timeout' when i try to dtnping. and the notice seems repeating this : - new bundle queued - bundle deleted - bundle has been expired - bundle received it repeated again and again and dtnping still timeout. thank you :)

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