[ns] Implementing Snoop module in Base Station

[Tomasz Pamuła]

Hello
I'm using ns 2.33.  I'm trying to add a snoop module to Base Station, but I
have some problems.
At the begin I create some configuration of the node

set opt(chan)   Channel/WirelessChannel
set opt(prop)   Propagation/TwoRayGround
set opt(netif)  Phy/WirelessPhy
set opt(mac)    Mac/802_11
set opt(ifq)    Queue/DropTail/PriQueue
set opt(ll)     LL
set opt(llS)     LL/LLSnoop
set opt(ant)    Antenna/OmniAntenna
set opt(ifqlen)         50
set opt(adhocRouting)   DSDV

set opt(x)      500
set opt(y)      500

set opt(nn)              1
set num_wired_nodes      5
set num_bs_nodes         1
set que_limit         20

$ns node-config    -adhocRouting $opt(adhocRouting) \
        -llType $opt(llS) \
        -macType $opt(mac) \
        -ifqType $opt(ifq) \
        -ifqLen $opt(ifqlen) \
        -antType $opt(ant) \
        -propType $opt(prop) \
        -phyType $opt(netif) \
        -channelType $opt(chan) \
        -topoInstance $topo \
        -wiredRouting ON \
        -agentTrace ON \
        -routerTrace ON \
        -macTrace OFF

And then I create Base Station

set BS(0) [$ns node 1.0.0]

but when I invoke a script I get an error:
*Memory security injury*

but when I use -llType $opt(ll) instead of -llType $opt(llS) everything
works fine.

Can someone help me?
thanks in advance