ns-mac.tcl

CBRP协议（移动adhoc中基于分簇的路由协议）ns2下的源码

#
# Copyright (c) 1997 Regents of the University of California.
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#    must display the following acknowledgement:
# 	This product includes software developed by the Daedalus Research
#       Group at the University of California, Berkeley.
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# Contributed by the Daedalus Research Group, http://daedalus.cs.berkeley.edu
#

#default channel propagation delay (for a LAN)
Channel set delay_ 4us

#default bandwidth setting
Mac set bandwidth_ 1.5Mb
Mac set hlen_ 0
Mac set label_ 0

# WaveLAN settings (also inherited by Csma/Ca, which is what WaveLAN is)
Mac/Csma set bandwidth_ 2Mb
Mac/Csma set hlen_ 20
Mac/Csma set delay_ 64us
Mac/Csma set ifs_ 16us
Mac/Csma set slotTime_ 16us
Mac/Csma set cwmin_ 16
Mac/Csma set cwmax_ 1024
Mac/Csma set rtxLimit_ 16

# 10 Mbps Ethernet settings
Mac/Csma/Cd set bandwidth_ 10Mb
Mac/Csma/Cd set ifs_ 52us
Mac/Csma/Cd set slotTime_ 52us
Mac/Csma/Cd set cwmin_ 1

# IEEE 802.11 MAC settings
if [TclObject is-class Mac/802_11] {
Mac/802_11 set hlen_ 20
Mac/802_11 set delay_ 64us
Mac/802_11 set ifs_ 16us
Mac/802_11 set slotTime_ 16us
Mac/802_11 set cwmin_ 16
Mac/802_11 set cwmax_ 1024
Mac/802_11 set rtxLimit_ 16
Mac/802_11 set bssid_ -1
Mac/802_11 set sifs_ 8us
Mac/802_11 set pifs_ 12us
Mac/802_11 set difs_ 16us
Mac/802_11 set rtxAckLimit_ 1
Mac/802_11 set rtxRtsLimit_ 3
}

# Multihop wireless MAC modeled after Metricom's Ricochet
if [TclObject is-class Mac/Multihop] {
Mac/Multihop set bandwidth_ 100Kb
Mac/Multihop set delay_ 10ms
Mac/Multihop set tx_rx_ 11.125ms
Mac/Multihop set rx_tx_ 13.25ms
Mac/Multihop set rx_rx_ 10.5625
Mac/Multihop set backoffBase_ 20ms
Mac/Multihop set hlen_ 16
}

# The MAC classifier (to demux incoming packets to the correct LL object)
Mac instproc classify-macs {peerinfo} {
	set peerlabel [lindex $peerinfo 0]
	set peerll [lindex $peerinfo 1]
	$self instvar mclass_
	set mclass_ [new Classifier/Mac]
	$mclass_ install $peerlabel $peerll
	$self target $mclass_
}

# XXX this belongs in ns-node.tcl
# Hook up the MACs together at a given Node
Node instproc addmac {mac} { 
	$self instvar machead_ mactail_

	if ![info exists mactail_] {
		set mactail_ [set machead_ $mac]
		$mac maclist $mactail_
	} else {
		$mactail_ maclist $mac
		$mac maclist $machead_
		set mactail_ $mac
	}
}