#!/bin/bash

################################################################################
#   OpenAirInterface
#   Copyright(c) 1999 - 2015 Eurecom
#
#    OpenAirInterface is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#
#    OpenAirInterface is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with OpenAirInterface.The full GNU General Public License is
#    included in this distribution in the file called "COPYING". If not,
#    see <http://www.gnu.org/licenses/>.
#
#  Contact Information
#  OpenAirInterface Admin: openair_admin@eurecom.fr
#  OpenAirInterface Tech : openair_tech@eurecom.fr
#  OpenAirInterface Dev  : openair4g-devel@eurecom.fr
#
#  Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
#
################################################################################
# file init_nas_nos1
# brief loads the nasmesh module and sets up the radio bearers (used to provide ip interface without S1 interface)
# author Florian Kaltenberger
#
#######################################

LTEIF=oip0
OPENAIR_DIR=/home/oai/svn-oai/openair4G

load_module() {
  mod_name=${1##*/}
  mod_name=${mod_name%.*}
  if awk "/$mod_name/ {found=1 ;exit} END {if (found!=1) exit 1}" /proc/modules
    then
      echo "module $mod_name already loaded: I remove it first"
      sudo rmmod $mod_name
  fi
  echo loading $mod_name
  sudo insmod $1
}

load_module $OPENAIR_DIR/targets/bin/ue_ip.ko

if [ "$1" = "UE" ]; then
  echo "bring up oip0 interface for UE"
  ifconfig oip0 up
fi

ip route flush cache
sleep 1
sysctl -w net.ipv4.conf.all.log_martians=1
echo "Disabling reverse path filtering"
sysctl -w net.ipv4.conf.all.rp_filter=0
ip route flush cache

# Check table 200 lte in /etc/iproute2/rt_tables
fgrep lte /etc/iproute2/rt_tables  > /dev/null 
if [ $? -ne 0 ]; then
    echo "200 lte " >> /etc/iproute2/rt_tables
fi
ip rule add fwmark 1 table lte
ip route add default dev $LTEIF table lte