UDP Broadcast

[neil mehta]

Hello,

I am trying to use the BasicBurst UDP app on omnetpp 4.0. for
broadcasting to all neighbours in a wireless adhoc scenario. For this
I set the destAddresses ="Broadcast". I also tried "255.255.255.255"
and "10.0.0.1". Here, the network ip starts from 10.0.0.x.
Also, according to this thread
http://groups.google.com/group/omnetpp/browse_thread/thread/4dc2feef3ce53f85/2435092169557472?q=broadcast&lnk=ol&
I have set the ctrl->setInterfaceId(101); in the function
UDPBasicBurst::sendToUDPDelayed

Despite this I am not able to get the broadcast working. Is there some
other code as well that needs to be modified.

Thank you very much for your help,
Neil.

[Alfonso Ariza]

Are you working with the inet-framework or with the inetmanet?
the broadcast UDP is supported in inetmanet only

--------------------------------------------------
From: "neil mehta" <neilb...@gmail.com>
Sent: Monday, April 12, 2010 8:21 PM
To: "omnetpp" <omn...@googlegroups.com>
Subject: [Omnetpp-l] UDP Broadcast

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[neil mehta]

Currently I am working with InetManet.

On Apr 12, 3:41 pm, "Alfonso Ariza" <aariza...@hotmail.com> wrote:
> Are you working with the inet-framework or with the inetmanet?
> the broadcast UDP is supported in inetmanet only
>
> --------------------------------------------------

> From: "neil mehta" <neilbme...@gmail.com>

> Sent: Monday, April 12, 2010 8:21 PM
> To: "omnetpp" <omn...@googlegroups.com>
> Subject: [Omnetpp-l] UDP Broadcast
>
> > Hello,
>
> >        I am trying to use the BasicBurst UDP app on omnetpp 4.0. for
> > broadcasting to all neighbours in a wireless adhoc scenario. For this
> > I set the destAddresses ="Broadcast".  I also tried "255.255.255.255"
> > and "10.0.0.1". Here, the network ip starts from 10.0.0.x.
> > Also, according to this thread

> >http://groups.google.com/group/omnetpp/browse_thread/thread/4dc2feef3...

[neil mehta]

Hello,

I tried the UDPBasicApp (modifying the code to allow broadcast
as above, i.e. setting interface ID to 101 in AppBase.cc) and found
that the broadcast works at the sender side. However, at the receiver
side there is partial work. The packet is received correctly but
dropped at the UDP layer (the packet is dropped due to wrong port). I
dont understand why this would happen. I set the
destPort=localPort=1234 in the UDPApp in my .ini file.

Thank you,
Neil.

[neil mehta]

For further debugging if host[4] has received a UDPBasicApp packet,
following is the debug message

IP UDP Helper. Allowing local delivery
** Event #56 T=1.001027516919 scenario.host[4].udp (UDP, id=82), on
`UDPBasicAppData-0' (UDPPacket, id=103)
Packet UDPBasicAppData-0 received from network, dest port 1234
No socket registered on port 1234
sending ICMP error ICMP-error-#1-type13-code3
** Event #57 T=1.001027516919
scenario.host[4].networkLayer.errorHandling (ErrorHandling, id=90), on
`ICMP-error-#1-type13-code3' (ICMPMessage, id=104)
Error Handler: ICMP message received:
Type: 13 Code: 3 Bytelength: 540 Src: <unspec> Dest: 255.255.255.255
Time: 1.001027516919

Neil.

[Alfonso Ariza]

See the message "No socket registered on port 1234"

The application haven't registered the socket

bindToPort(localPort);

--------------------------------------------------
From: "neil mehta" <neilb...@gmail.com>

Sent: Tuesday, April 13, 2010 1:21 AM
To: "omnetpp" <omn...@googlegroups.com>
Subject: [Omnetpp-l] Re: UDP Broadcast

[neil mehta]

Got it. It works.

Thanks,
Neil.

On Apr 13, 5:43 am, "Alfonso Ariza" <aariza...@hotmail.com> wrote:
> See the message  "No socket registered on port 1234"
>
> The application haven't registered the socket
>
>     bindToPort(localPort);
>
> --------------------------------------------------

> From: "neil mehta" <neilbme...@gmail.com>

[Manel Seddiki]

Hello,

Actually, i have the same issue :(

The broadcast works fine at the sender (port=1024, dest=255.255.255.255) but at the receiver, the packet is stopped on the UDP layer and not passed to the higher layer (My application). "No socket registered on port 1024" error appears in the debug and I have to mention that ll my nodes did BindToPort(localport) at the beginning so i don't understand why the packet is stopped. 

I have noticed also that in the simulation kernel , the udp Module becomes red when the broadcasted packet is recieved to udp , it seems like the BindToPort is cancelled at this moment. I don't know if i'm i right or wrong but i need some explanation about this.

Please help me to see clear on this and than you in advance

[Alfonso Ariza Quintana]

https://github.com/aarizaq/inetmanet-2.0/tree/inetmanet-2.2/examples/manetrouting/net80211_flood

this example uses flooding and broadcast

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[Manel Seddiki]

socket.setBroadcast(true); was missed in my application code :)

thank you very much Alfonso for your help !