This repository contains the source code of Whisper. Whisper floods small amounts of data reliably into a multi-hop network. [paper]
Disclaimer: Although we tested the code extensively, Whisper is a research prototype that likely contains bugs. We take no responsibility for and give no warranties in respect of using the code.
We started the implementation using LaneFlood (see the code here). We use LaneFlood's bootstrapping process but once it is finished, we switch to another scheduler and do not use LaneFlood anymore. For bootstrapping, we use Glossy. Because Glossy and Whisper use the same interrupt routine, we set the protocol to use with set_gfast_modus(..) to either LANEFLOOD_GLOSSY or LANEFLOOD_WHISPER (see net/mac/gfast.h). More precisely, the interrupt is caught in net/mac/gfast.c and the corresponding protocol is called from there. The implementation for LaneFlood can be found in net/mac/laneflood, the implementation for Glossy can be found in net/mac/glossy, and the implementation for Whisper can be found in net/mac/whisper.
Whisper does not work with IP yet. Therefore IP, TCP and UDP must be disabled: CFLAGS += -DUIP_CONF_UDP=0 -DUIP_CONF_TCP=0 -DNETSTACK_CONF_WITH_IPV6=0.
The evaluation of this work was done with msp430-gcc (GCC) 4.6.3 20120301 (mspgcc LTS 20120406 unpatched). Other compilers or versions of the msp430-gcc may lead to different evaluation results.