Re: [ibr-dtn] [IBR-DTN] " ERROR IPNDAgent: failed "

19 Jul 2015


      Hi Matheus,
again, I'm replying in public (cc: ibr-dtn@ibr.cs.tu-bs.de). Please do
so, too, since I won't be able to reply the next two weeks...
Maybe you should have at first a look at the DTN architecure. In order
to transmit data, you need to define on which interfaces nodes will be
able to exchange data. These are the "convergence layers".
What you will need in your ibrdtnd.conf is something like this, for all
embedded platforms:
-----------------------
#routing:
# use prophet/epidemic/flodding instead of 
# "default" to be able to transmit bundles from
# the banana pi to the raspberry via BB
routing = prophet
#could be lo, to allow connections only from the loopback interface
#api_interface is used to define where applications connect to
#the local dtnd
api_interface = any
#which interfaces to use
net_interfaces = wlan0 wlan1
#wireless interface wlan0:
net_wlan0_type = tcp        #we want to use TCP as protocol
net_wlan0_interface = wlan0 #listen on interface wlan0
net_wlan0_port = 4556       #with port 4556 (default)
#wireless interface wlan1:
net_wlan1_type = tcp        #we want to use TCP as protocol
net_wlan1_interface = wlan1 #listen on interface eth0 
net_wlan1_port = 4556       #with port 4556 (default)
-----------------------
This part of the config file could be used on the embeded platforms,
maybe you have to adjust the interfaces for the node with internet.
Best regards and good luck,
Stephan
On Sa, 2015-07-18 at 15:07 -0300, matheus oliveira wrote:
...
Hello Stephan,
I confess I did not understand much how to define a convergence layer
for my goal. What I want is basically using the wlan0 as a point of
access and the wlan1 to connect to other nodes. That's because like
each node could provide both access points as well as connect to other
nodes.  If you give to use only the wlan0 to do both better. The
connection between the nodes has to be via Wireless, with the
exception of the node connected to the Internet. It would then be
Ethernet to connect to the internet and Wifi to connect to other
nodes.
Node with Internet        Raspberry             Beaglebone
BananaPi


| wlan0 |<------------------- | wlan1 |                 | wlan0 | <
----------- | wlan1 |


   |                            --------


| Internet |                    | wlan0 | <-------------- | wlan1 |
| wlan0 |
                                    --------

Greetings!
2015-07-18 8:02 GMT-03:00 Stephan Rottmann rottmann@ibr.cs.tu-bs.de:
    Hi Matheus,

    I'm replying public to the IBR-DTN-list since there are many
    other
    people reading and might have an idea, too. Thus, I also
    attached the
    files, too.

    Can you draw an (ASCII-Art) image of the setup (network
    interfaces, ...)
    of what you are trying to do, please?

    In the mail you said, you are using wlan0 for communication,
    but in the
    config, you defined wlan1 as the device, where you can reach
    the API.
    This means, that tools like dtnsend can connect to the deamon
    via this
    interface.
    If I get it right, there are no convergence layers defined in
    your
    config, which are needed for communication between the nodes.

    How are the Raspberry and BeagleBone connected to each other,
    via
    Ethernet or WLAN?

    Best regards,
    Stephan

    On Fr, 2015-07-17 at 13:39 -0300, MATHEUS CARMO OLIVEIRA
    wrote:
    > Thanks for answering!
    > The corresponding configuration file log of the previous
    email is
    > ibrconf.
    >
    >
    > I tested again using the default setting when installing the
    program,
    > the ibrdtnd_default.conf. The corresponding log is
    ibrdtn_default.log.
    > Attached are also the interfaces settings.
    >
    >
    > I would like to stress that I am only interested in
    connecting a
    > Raspberry Pi to others who are running the daemon to measure
    protocols
    > performances, be a BEAGLEBONE or Raspberry well. Oh yeah,
    I'm using
    > hostapd Program wlan0 interface. This affects something?
    >
    >
    > (Code attached).
    >
    > 2015-07-17 12:44 GMT-03:00 Stephan Rottmann
    > <rottmann@ibr.cs.tu-bs.de>:
    >         Hi Matheus,
    >
    >         can you please attach your configuration file?
    >
    >         Best regards to Manaus,
    >         Stephan
    >
    >         Am Freitag, den 17.07.2015, 11:46 -0300 schrieb
    MATHEUS CARMO
    >         OLIVEIRA:
    >         > Hello guys! I'm a graduate student in Computer
    Science from
    >         the
    >         > Federal University of Amazonas. Sorry my English,
    because
    >         I'm trying
    >         > to translate in parallel with Google Translate.
    Anyway, I'm
    >         on a
    >         > research project on DTN, and I'm interested in
    using the
    >         IBR-DTN to
    >         > assist me in the search. I'm using IBR-DTN program
    Raspberry
    >         Pi and
    >         > BEAGLEBONE, both with Raspbian. It generates the
    output
    >         below:
    >         >
    >         >
    >         > Thu Jul 16 16:43:13 2015 INFO NativeDaemon:
    IBR-DTN daemon
    >         1.0.1-433
    >         > (build 916f576)
    >         > Thu Jul 16 16:43:13 2015 INFO Configuration:
    Configuration:
    >         ibrconf
    >         > Thu Jul 16 16:43:13 2015 INFO NativeDaemon: use
    logfile for
    >         > output: /home/pi/ibrdtn.log
    >         > Thu Jul 16 16:43:13 2015 INFO NativeDaemon:
    Parallel event
    >         processing
    >         > enabled using 4 processes.
    >         > Thu Jul 16 16:43:13 2015 INFO BundleCore: Local
    node name:
    >         > dtn://node1.dtn
    >         > Thu Jul 16 16:43:13 2015 INFO BundleCore:
    Forwarding of
    >         bundles
    >         > enabled.
    >         > Thu Jul 16 16:43:13 2015 NOTICE GlobalEvent:
    Internet
    >         connection is
    >         > available.
    >         > Thu Jul 16 16:43:13 2015 INFO SecurityKeyManager:
    >         initialized;
    >         > path: /etc/ibrdtn/bpsec
    >         > Thu Jul 16 16:43:13 2015 INFO NativeDaemon: using
    bundle
    >         storage in
    >         > memory-only mode
    >         > Thu Jul 16 16:43:13 2015 INFO NativeDaemon: API
    initialized
    >         using unix
    >         > domain socket: /tmp/ibrdtn.sock
    >         > Thu Jul 16 16:43:13 2015 INFO DiscoveryAgent:
    listen to
    >         > [224.0.0.142]:4551
    >         > Thu Jul 16 16:43:13 2015 INFO DiscoveryAgent:
    listen to
    >         > [ff02::142]:4551
    >         > Thu Jul 16 16:43:13 2015 INFO DHTNameService: DHT
    >         initialized on Port:
    >         > 36803 with ID:
    >         > Thu Jul 16 16:43:13 2015 ERROR IPNDAgent: failed
    to set-up
    >         multicast
    >         > socket on <any>:4551: 97: cannot create socket
    >         > Thu Jul 16 16:43:13 2015 INFO NativeDaemon: Using
    default
    >         routing
    >         > extensions
    >         > Thu Jul 16 16:43:14 2015 WARNING DHTNameService:
    >         bootstrapping from
    >
    >         > domain dtndht.ibr.cs.tu-bs.de failed with error:
    -2
    >         > Thu Jul 16 16:43:15 2015 INFO DHTNameService: DHT
    shut down
    >         > Thu Jul 16 16:43:15 2015 NOTICE GlobalEvent:
    Shutdown
    >         initiated.
    >         >
    >         >
    >         >
    >         >
    >         > The message "Daemon is ready" never appears. Can
    you help me
    >         with
    >         > this!
    >         >
    >         >
    >         > Greetings !!
    >
    >
    >
    >
    >
    >

Stephan Rottmann

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