The DMAC code is implemented through modification on the mac-802_11 file in
the NS2 release.

Major files and functions are in the mac directory:
mac-802_11.h:               Data structure in the simulation, added some
data structure and timers used in DMAC:
mac-802_11-smac.cc     A simple implementation of SMAC with only periodical
duty cycle
                                       and adaptive listening (Assume global
synchronization is available)
mac-802_11-more.cc     DMAC without MTS implmentation
mac-802_11-nts.cc         DMAC with MTS implementation

class WakeupTimer;
struct nts_frame;
void Mac802_11::wakeupHandler();
void Mac802_11::sendNTS(int dst, int flag);
void Mac802_11::recvNTS(Packet *p)

There are also some modifications to tcl/lib/ns-lib.tcl,
tcl/lib/ns-mobilenode.tcl, etc.

Simulation tcl code used in the paper is in the ns-dmac/simulation
directory, for example,
cbr-49-test              Defines the traffic load in the simulation
scen-49-test             Defines the topology of the simulation, as well
    as some configuration
cbrtree.tcl              The configuration file for the simulation of TREE
topology
cbrchain.tcl             The configuration file for the simulation of CHAIN
topology

A simple manual forwarding protocol used in the simulation is in
ns-dmac/simroute:
simroute.cc, simroute.h

Author: Gang Lu, ganglu@usc.edu
June 16, 2004
Autonomous Networks Research Group, USC
http://ceng.usc.edu/~anrg/