Dear Howard,
The easiest way to transmit from one NsObject (e.g. Nodes) to another is through a (C++ and Tcl) Connector object. A connector has two pointers to NsObjects: target_ and drop_. In the OTcl domain, it uses an OTcl commands "target" and "drop" (followed by the name of the NsObject) to specify its "forwarding object" and "dropping object" A Connector object recieves a Packet "p" through its funciton recv(p,h). Upon receiving a packet, the Connector object forwards the packet "p" to its forwarding object by executing "target_->recv(p,h)". To drop a packet, the function drop(p) of a Connector object is invoked. In this case, the packet is forwarded to the dropping object "*drop_" which is responsible for destroying the packet. To find out more about Connector please refer to chapter 5 in the following book from Springers: If you are a beginning user, you may look at the following book from Springer. T. Issaraiyakul and E. Hossain, "Introduction to Network Simulator NS2", Springer 2008. Here is the link: http://www.springer.com/engineering/signals/book/978-0-387-71759-3 You might also find the following slide useful: http://www.ece.ubc.ca/~teerawat/NS2.htm<http://www.ece.ubc.ca/%7Eteerawat/NS2.htm On 11/11/2008, "howardgod howardgod" <[EMAIL PROTECTED]> wrote: > >---------- Forwarded message ---------- >From: howardgod howardgod <[EMAIL PROTECTED]> >Date: 2008/11/8 >Subject: How to send a packet to previous node >To: ns-users@isi.edu > > >I want to send a packet to previous node. And I don't know how to find >previous node's ID and where to fill the ID. > >I found that in common header, there's a prev_hop and next_hop_. But the >prev_hop_ is NOT the previous node. It's the source. > >So I want to fill previous node's ID to common header's next_hop_. > >And is there anything else I have to fill? > >btw I found a way to do so. Reverse the ip header's src and dst then send >it. but It still do nothing at all. > >HELP ME!! PLZ > >thanks a lot. > > Howard. >
