[ns] Requesting for help regarding error correction while implementing ids

Respected sir
In order to prevent wormhole attack we have
implemented ids .but we are getting the following errors .Pls help
idsaodv/idsaodv.o: In function `idsBroadcastTimer::handle(Event*)':
idsaodv.cc:(.text+0x67e): undefined reference to `idsAODV::rrep_purge()'
idsaodv/idsaodv.o: In function `idsAODV::recvReply(Packet*)':
idsaodv.cc:(.text+0x1921): undefined reference to
`idsAODV::rrep_lookup(int)'
idsaodv.cc:(.text+0x1946): undefined reference to
`idsAODV::rrep_insert(int)'
collect2: ld returned 1 exit status
make: *** [ns] Error 1

--
CBINDU PRASAD