#!/usr/bin/env bash

interface=""
do_routing_table=0
do_ODM=0
just_echo=0

function usage
{
	retval="$1"
	(
		echo "Usage: $0 -i interface [-r|-o] [-h] [-e]"
		echo "-i interface specifies what interface the routes are for"
		echo "-r says to add entries to the routing table (this script should just generate an error on dups, no big deal)"
		echo "-o says to add entries to the ODM (be careful about duplicates - this script will not avoiding adding dups)"
		echo "-h says to show this help message"
		echo "-e says to just echo what would be done - don't actually do it"
	) 1>&2
}

while [ "$#" -ge 1 ]
do
	if [ "$1" = "-i" ] && [ "$#" -ge 2 ]
	then
		interface="$2"
		shift
	elif [ "$1" = "-r" ]
	then
		do_routing_table=1
	elif [ "$1" = "-o" ]
	then
		do_ODM=1
	elif [ "$1" = "-e" ]
	then
		just_echo=1
	elif [ "$1" = "-h" ]
	then
		usage 0
	else
		usage 1
	fi
	shift
done

if [ $[$do_routing_table+$do_ODM] = 0 ]
then
	echo Sorry, you must specify one or both of -r and -o 1>&2
	usage 1
fi

if [ "$interface" = "" ]
then
	echo "Sorry, you must specify an interface with -i" 1>&2
	usage 1
fi


# add -net 137.110.243.0 netmask 255.255.255.0 gw <your_opitputer_gateway>
# add -net 137.110.244.0 netmask 255.255.255.0 gw <your_opitputer_gateway>..
# add -net 137.110.245.0 netmask 255.255.255.0 gw <your_opitputer_gateway>..
# add -net 137.110.246.0 netmask 255.255.255.128 gw <your_opitputer_gateway>..
# add -net 137.110.246.128 netmask 255.255.255.128 gw <your_opitputer_gateway>
# add -net 137.110.247.0 netmask 255.255.255.0 <your_opitputer_gateway>

# esmf04m-root> lsattr -EHl inet0
# attribute     value                                                                             description                      user_settable
#
# hostname      esmf04m                                                                           Host Name                        True
# gateway                                                                                         Gateway                          True
# route         net,-hopcount,0,,0,128.200.197.129                                                Route                            True
# route         net,-interface,-netmask,255.255.255.128,-if,en1,,128.200.197.128,128.200.197.129
# route         net,-hopcount,0,-netmask,255.255.255.128,-if,en1,,0,128.200.197.129
# route         net,-hopcount,0,,0,137.110.247.209
# route         net,-hopcount,0,-netmask,255.255.255.240,-if,en3,,137.110.247.208,137.110.247.209
# route         net,-hopcount,0,-netmask,255.255.255.0,-if,en3,,136.110.243.0,137.110.247.209
# route         net,-hopcount,0,-netmask,255.255.255.0,-if,en3,,137.110.244.0,137.110.247.209
# route         net,-hopcount,0,-netmask,255.255.255.0,-if,en3,,137.110.245.0,137.110.247.209
# route         net,-hopcount,0,-netmask,255.255.255.128,-if,en3,,137.110.246.0,137.110.247.209
# route         net,-hopcount,0,-netmask,255.255.255.128,-if,en3,,137.110.246.128,137.110.247.209
# route         net,-hopcount,0,-netmask,255.255.255.0,-if,en3,,137.110.247.208,137.110.247.209
# route         net,-hopcount,0,-netmask,255.255.255.0,-if,en3,,137.110.243.0,127.110.247.209
# route         net,-hopcount,0,-netmask,255.255.255.0,-if,en3,,137.110.243.0,137.110.247.209
# bootup_option no                                                                                Serial Optical Network Interface True
# rout6                                                                                           FDDI Network Interface           True
# authm         65536                                                                             Authentication Methods           True
# Wed Nov 16 14:20:30

#chdev -l inet0 -a "net,-hopcount,1,-netmask,255.255.255.0,207.156.168.0,10.0.15.254"

#route [ -f ] [ -n ] [ -q ] [ -v ] Command [ Family ] [ [ -net | -host ]
#Destination [ -prefixlen n] [ -netmask [ Address ] ] Gateway ] [ Arguments ]

while read addword netoption network netmaskword netmask gwword gw dummy
do
	case "$addword/$netoption/$netmaskword/$gwword/$dummy" in
		"add/-net/netmask/gw/")
#			echo Good line 1>&2
			ODM="chdev -l inet0 -a net,-hopcount,0,-netmask,$netmask,-if,$interface,,$network,$gw"
			ROUTE="route add -net $network -netmask $netmask $gw"
			if [ "$do_routing_table" = 1 ]
			then
				if [ "$just_echo" = 1 ]
				then
					echo "$ROUTE"
				else
					eval "$ROUTE"
				fi
			fi
			if [ "$do_ODM" = 1 ]
			then
				if [ "$just_echo" = 1 ]
				then
					echo "$ODM"
				else
					eval "$ODM"
				fi
			fi
			;;
		*)
			echo Bad line 1>&2
			;;
	esac
done