for dir in up${halfduplex} ${download:+down}; do
case "$dir" in
up)
- [ "$overhead" = 1 ] && upload=$(($upload * 98 / 100 - (32 * 128 / $upload)))
+ [ "$overhead" = 1 ] && upload=$(($upload * 98 / 100 - (15 * 128 / $upload)))
dev="$device"
rate="$upload"
dl_mode=""