Netgraph node splicing - add a Tee node

netgraph_tee_splice.sh

#!/bin/sh
# builds an ng_tee with an ng_iface tied in where the LEFT and LEFT_HOOK were so tcpdump can observe
LEFT=$1
LEFT_HOOK=$2
### ngctl show $LEFT:$LEFT_HOOK
# take RIGHT, RIGHT_HOOK  from above line
RIGHT=`ngctl show  $LEFT:$LEFT_HOOK | grep -Eo 'ID: [0-9a-e]+' | grep -Eo '[0-9a-e]+'`
RIGHT_HOOK=`ngctl show $LEFT:$LEFT_HOOK | grep $LEFT_HOOK | awk '{print $1}'`
ngctl rmhook  $LEFT:  $LEFT_HOOK
ngctl mkpeer $LEFT: tee $LEFT_HOOK left
ngctl mkpeer $LEFT:$LEFT_HOOK iface right2left inet
ngctl connect $LEFT:$LEFT_HOOK '['$RIGHT']': right $RIGHT_HOOK