[ns] the whole ns process in a simple simulation

[Liuhai]

hi all

	I am not very clear with the whole process in a simple wireless simulation, we can use a the following simulation as our example:

set val(chan)           Channel/WirelessChannel    ;# channel type
set val(prop)           Propagation/TwoRayGround   ;# radio-propagation model
set val(netif)          Phy/WirelessPhy            ;# network interface type
set val(mac)            Mac/802_11                 ;# MAC type
set val(ifq)            Queue/DropTail/PriQueue    ;# interface queue type
set val(ll)             LL                         ;# link layer type
set val(rp)             DSR                        ;# routing protocol


	the above is the main parameter of simulation, and agent layer is CBR + UDP. And I want to know the whole process from a packet's creation to reaching the destination.

	As my understanding, the cbr packet is created in the file agent.{h,cc} and cbr_traffic.cc, but I dont know how it get to the dsragent.cc, then it flow from dsr to LL, then to IFQ then to Mac, then wirelessPhy, and last to the channel. am i right???

hope you can help, thanks in advance
	

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¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡Liuhai
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡lhmyn at 163.com
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡2004-02-09