FreeBSD pipe satsim

set_pipe.sh

#!/bin/sh
# simple one, assumes pipe
# usage: set_pipe bw delay [errorpercentage]
#ipfw pipe 1 config bw $1Kbits delay $(($2/2))ms plr $3 queue $((($1*$2)/8))bytes
# 
# advanced, sets pipe
if [ $# "<" 6 ] ; then
  echo "usage: $0 <Client IP> <Server IP> <fw bw, kbps> <return bw, kbps> <delay, ms> <ber, float>";
fi
ipfw -f flush
ipfw -f pipe flush
# following variations depend on FreeBSD version
# ipfw add pipe 1 from $1 to $2 out via bridge0
ipfw add pipe 1 from $1 to $2 bridged
ipfw pipe 1 config bw $4Kbits delay $(($5/2))ms plt $6 queue $((($4*$5)/8))bytes