#!/bin/sh
set -e
# A short script to setup the network on a server creating bridges for each
# vlan specified.

# Why? NetworkManager sucks and so do other network utilities. This is simple
# and fits the need of creating a virtual machine host that can place VMs
# on any one of the vlans.

defaultrouter="10.9.8.7"
nameservers="10.11.12.13 10.12.14.16"
vlan_ifs="eth0 eth1 eth3"
eth0_vlan_ids="10"
eth0_vlan_10_inet="10.10.1.2/24"
eth1_vlan_ids="20 34 38 60 160 240 432"
eth1_vlan_60_inet="10.60.8.2/24"
eth3_vlan_ids=50
eth3_vlan_50_inet="10.50.0.1/24"
echo="echo"

for if in $vlan_ifs ; do
	$echo ip link set up $if
	eval vlan_ids="\$${if}_vlan_ids"

	for id in $vlan_ids; do
			$echo ip link add link $if name ${if}.${id} type vlan id ${id}
			$echo brctl addbr vlan${id}
			$echo brctl addif vlan${id} ${if}.${id}
			$echo ip link set up ${if}.${id}

			eval inet="\$${if}_vlan_${id}_inet"
			if ! [ -z "$inet" ] ; then
				$echo ip -4 addr add "$inet" dev ${if}.${id}.
			fi
	done
done

$echo ip route add default via $defaultrouter

$echo truncate -s 0 /etc/resolv.conf
for ns in $nameservers ; do
		if ! [ -z "$echo" ] ; then
			echo echo nameserver $ns '>>' /etc/resolv.conf
		else 
			echo nameserver $ns >> /etc/resolv.conf
		fi
done