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Re: [ns] IP_BROADCAST error: no target for slot -1

To: Sudhindra Suresh Bengeri <[email protected]>
Subject: Re: [ns] IP_BROADCAST error: no target for slot -1
From: Satish Kumar <[email protected]>
Date: Tue, 25 Apr 2000 18:06:31 -0700
cc: [email protected]
In-reply-to: Your message of Fri, 21 Apr 2000 23:57:11 -0400. <Pine.GSO.4.21.0004212340590.7154-400000@c00745-400wi.eos.ncsu.edu>
Reply-To: [email protected]
Sender: [email protected]

Are you looking to do neighbour discovery in a wireless network (since you 
refer to AODV)? If so, you need to set up the network differently from your 
example script. Please have a look at the ns tutorial and the ns manual 
(Chapter 15) on how to set up a wireless simulation.

Satish


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> ---559023410-1903590565-956375831=:7154
> Content-Type: TEXT/PLAIN; charset=US-ASCII
> 
> Hi,
> 
> I want to do neighbour discovery, the way I want to do it is sending a
> packet to IP_BROADCAST address with ttl = 1(the way it is done in AODV). 
> 
> Here is a snippet of my tcl script
> 
> set sim0 [new Agent/Simple [$n0 id]]
> $ns attach-agent $n0 $sim0
> 
> .. other nodes with the similar agent attached
> 
> $ns at 0.2 "$sim0 broadcast"
> 
> When the command function in C++ class, executes the following code
> ...
>     cm->ptype() = PT_SIMPLE;
>     ih->daddr() = IP_BROADCAST;
>     ih->saddr() = myId;
> 
>     ih->ttl() = 1;
>  
> target_->recv(p, (Handler*) 0);
> ...
> 
> I get the following error message and 'ns' aborts
> 
> _o11: no target for slot -1
> 
> **
> How do I specify that these packets should come to my agent.
> **
> A related question that I have is if I bind my agent on a particular port,
> will all the instances of my agent attached to other nodes inherit that
> port nr.
> **
> Can youi pls give me some pointers to gain better knowledge about agents
> binding to port. 
> 
> I have attached my C++ and tcl script just in case you require to know
> what exactly I am doing.
> 
> Thanks in anticipation.
> 
> Regards,
> Sudhin.
> 
> ****************** Sudhindra Suresh Bengeri *******************
> School:                       | Home:                         |
> Dept. of Computer Science     | 2502, Avent Ferry Rd          |
> NCSU, Raleigh, NC.            | Apt #206, Raleigh, NC - 27606 |
> Ph. 919 515 7135(TA room)     | Ph. 919 838 8746              |     
> web page: http://www4.ncsu.edu/~ssbenger
> 
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References:
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  - From: Sudhindra Suresh Bengeri <[email protected]>
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