#!/bin/bash

DEFAULT=/etc/default/snf-network

source $DEFAULT
source $CONF
source $INFRA

HOSTNAME=$(hostname)


INTERFACES=$STATE_DIR/interfaces
HOSTINFRA=$STATE_DIR/infra

if [ ! -e "$HOSTINFRA" ]; then 
  echo "A host infra file must exist" 
  echo "Run snf-network-build-host-infra"
  exit 1
fi

source $HOSTINFRA

DONOTIFUP=false

check_iface(){
  if [ -n "$1" -a -e /proc/sys/net/ipv4/conf/$1 ]; then 
    echo Interface $1 already exist! Please check
    export DONOTIFUP=true
  fi
}


check_iface "$PUBLIC_BRIDGE"
check_iface "$PUBLIC_IFACE.$PUBLIC_VLAN_ID"
check_iface "$PUBLIC_IFACE.$PRIVATE_VLAN_ID"
check_iface "$PRIVATE_BRIDGE"

if [ -n "$PRIVATE_VLAN_ID_OFFSET" ]; then
  for id in `seq $PRIVATE_VLAN_ID_MIN 1 $PRIVATE_VLAN_ID_MAX`; do
    check_iface $PUBLIC_IFACE.$((PRIVATE_VLAN_ID_OFFSET+id))
    check_iface $BRIDGE_PREFIX$id
  done
fi

(

if [ -n "$PUBLIC_BRIDGE" -a -n "$PUBLIC_IFACE" ]; then
  cat<<EOF
auto $PUBLIC_BRIDGE
iface $PUBLIC_BRIDGE inet manual
  bridge_ports $PUBLIC_IFACE
  bridge_stp off
  bridge_fd 2
  post-up ip link set $PUBLIC_BRIDGE address $PUBLIC_MAC 

EOF

else
  if [ -n "$PUBLIC_VLAN" ]; then
    cat<<EOF
auto $PUBLIC_VLAN
iface $PUBLIC_VLAN inet manual

EOF
  fi

  if [ -n "$PRIVATE_VLAN" -a -n "$PRIVATE_BRIDGE" ]; then
    cat<<EOF
auto $PRIVATE_VLAN
iface $PRIVATE_VLAN inet manual

auto $PRIVATE_BRIDGE
iface $PRIVATE_BRIDGE inet manual
  bridge_ports $PRIVATE_VLAN
  bridge_stp off
  bridge_fd 2
  post-up ip link set $PRIVATE_BRIDGE address $PUBLIC_MAC 

EOF
  fi  

  if [ -n "$PRIVATE_VLAN_ID_OFFSET" ]; then
     HELPER="$PRIVATE_VLAN_ID_MIN $PRIVATE_VLAN_ID_MAX $PRIVATE_VLAN_ID_OFFSET"
     cat<<EOF
auto prv
iface prv inet manual
    up   prv-net-helper up   $PUBLIC_IFACE $HELPER $BRIDGE_PREFIX
    down prv-net-helper down $PUBLIC_IFACE $HELPER $BRIDGE_PREFIX

EOF
  fi
    
fi

) > $INTERFACES

echo 1 > /proc/sys/net/ipv4/conf/all/forwarding
echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
echo 1 > /proc/sys/net/ipv4/ip_forward

if $DONOTIFUP; then
  echo Check interfaces:
  cat $INTERFACES
  exit 1
fi

ifup -i $INTERFACES -a