#!/bin/sh # convert: # dhcptype=5 # serverid=172.16.42.102 # lease=97200 # interface=eth0 # ip=172.16.42.177 # subnet=255.255.255.0 # mask=24 # broadcast=172.16.22.255 # router=172.16.42.98 # dns=10.34.32.125 10.32.63.5 10.34.255.7 10.11.255.27 # domain=lab.example.com example.com # ntpsrv=10.34.32.125 10.34.255.7 # into: #let cfg=cfg+1 #if[$cfg]=...; ip[$cfg]=...; ipmask[$cfg]=.../...; gw[$cfg]=...; net[$cfg]=... dns[$cfg]=... exec >/dev/null #exec >"$0.out" # debug exec 2>&1 test "$interface" || exit 1 test "$ip" || exit 1 # some servers do not return subnet option. # guess it for standard private networks. if ! test "$mask"; then if test "$ip" != "${ip#192.168.}"; then mask=16 elif test "$ip" != "${ip#172.16.}"; then mask=12 # repeat for each in 172.17. - 172.31. range? elif test "$ip" != "${ip#10.}"; then mask=8 fi fi # some servers do not return router option. # assume DHCP server is the router. if ! test "$router"; then test "$serverid" && router="$serverid" fi { echo "let cfg=cfg+1" test "$interface" && echo "if[\$cfg]='$interface'" test "$ip" && echo "ip[\$cfg]='$ip'" test "$ip" && test "$mask" \ && echo "ipmask[\$cfg]='$ip/$mask'" test "$router" && echo "gw[\$cfg]='$router'" test "$dns" && echo "dns[\$cfg]='$dns'" # TODO: I never saw a dhcp server which correctly announces # which subnet(s) is/are available thru advertised router # Assume 0/0 echo "net[\$cfg]='0/0'" } >"$1"