Hello,everyone

I knew from the ns manual that the C++ procedure can invoke OTcl procedures by tcl.eval() and so on.How do the OTcl invoke the C++ procedures? I donot understand the mechanism well.In other words, how can NS use these commands to obtain those C++ procedure?

And what is the kernel in ns?

how does polling be implemented in ns ? for example, the agent sends ADS periodically.
and the dhcp?

i'd like do something in the SCTP Addip extension ,but it says that "All interfaces must be added after set-multihome-core is called and before multihome-attach-agent is called." in the command multihome-add-interface, is it correct? In this case, the Addip extension cannot be implemented at all.

Thanks in advance,
michael

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