#!/bin/sh +x

IP=/sbin/ip

SLICE=$1
SLICEID=`id -u $SLICE`
NODEID=$2
REMOTE=$3
KEY=$4
RATE=$5
VIRTIP=$6
VIRTNET=$7

SUBNET=`expr match "$VIRTNET" '.*\(/[0-9]*\)'`
LINK=${KEY}x${NODEID}

modprobe ip_gre

### Setup EGRE tunnel
EGRE=d$LINK
$IP tunnel add $EGRE  mode gre type eth remote $REMOTE key $KEY ttl 64
$IP link set $EGRE up

### Setup etun
ETUN0=a$LINK
ETUN1=b$LINK
ip link add name $ETUN0 type veth peer name $ETUN1
ifconfig $ETUN0 mtu 1458 up
ifconfig $ETUN1 up

### Setup bridge
BRIDGE=c$LINK
brctl addbr $BRIDGE
brctl addif $BRIDGE $EGRE 
brctl addif $BRIDGE $ETUN1
ifconfig $BRIDGE up

### Setup iptables so that packets are visible in the vserver
iptables -t mangle -A FORWARD -o $BRIDGE -j MARK --set-mark $SLICEID

### Put a process in the vserver so we can move the interface there
su $SLICE -c "sleep 30 &"
PID=`su $SLICE -c "pgrep -n sleep"`
$IP link set $ETUN0 netns $PID
naddress --add --nid $SLICEID --ip ${VIRTIP}${SUBNET}
su $SLICE -c "sudo /sbin/ifconfig $ETUN0 ${VIRTIP}${SUBNET} up; sudo /sbin/route add -net $VIRTNET dev $ETUN0"

### Set rate
tc qdisc add dev $EGRE root handle 1: htb default 10
tc class add dev $EGRE parent 1: classid 1:10 htb rate $RATE ceil $RATE