#!/bin/bash
PATH=/sbin:/usr/sbin/:/bin:/usr/bin

cd /etc/sysconfig/network-scripts
. ./network-functions

CONFIG=$1
[ -f "${CONFIG}" ] || CONFIG=ifcfg-${1}
source_config

if [ -n "$KEY_AH" -o -n "$KEY_ESP" ]; then
  KEYING=manual
fi


if [ -n "$IKE_PSK" ]; then
  KEYING=automatic
  IKE_METHOD=PSK
fi

if [ -n "$IKE_CERTFILE" ]; then
  KEYING=automatic
  IKE_METHOD=X509
fi

if [ -n "$IKE_PEER_CERTFILE" ]; then
  KEYING=automatic
  IKE_METHOD=X509
fi

if [ -n "$IKE_DNSSEC" ]; then
  KEYING=automatic
  IKE_METHOD=X509
fi
if [ -n "$RSA_KEY" ]; then
  KEYING=automatic
  IKE_METHOD=RSA
fi

[ -n "$IKE_METHOD" ] && KEYING=automatic
[ -z "$KEYING" ] && KEYING=manual

if [ -z "$SRC" ]; then
    SRC=$(ip -o route get to $DST | sed "s|.*src \([^ ]*\).*|\1|")
fi

if [ -n "$SRCNET" -o -n "$DSTNET" ]; then
  MODE=tunnel
  [ -z "$SRCNET" ] && SRCNET="$SRC/32"
  [ -z "$DSTNET" ] && DSTNET="$DST/32"
  SPD_SRC=$SRCNET
  SPD_DST=$DSTNET
  # If SRCNET is a subnet of DSTNET, exclude SRCNET<->SRCNET communication
  if [ "${SRCNET##*/}" -gt "${DSTNET##*/}" ] \
      && [ "$(ipcalc -n "${SRCNET%%/*}/${DSTNET##*/}")" \
           = "NETWORK=${DSTNET%%/*}" ]; then
    EXCLUDE_SRCNET=yes
  fi
  [ -z "$SRCGW" ] && SRCGW=$(ip -o route get to $SRCNET | sed "s|.*src \([^ ]*\).*|\1|")
  ip route del to $DSTNET via $SRCGW src $SRCGW
else
  MODE=transport
  SPD_SRC=$SRC
  SPD_DST=$DST
  unset EXCLUDE_SRCNET
fi

setkey -c << EOF
${SPI_AH_OUT:+delete $SRC $DST ah $SPI_AH_OUT;}
${SPI_AH_IN:+delete $DST $SRC ah $SPI_AH_IN;}
${SPI_ESP_OUT:+delete $SRC $DST esp $SPI_ESP_OUT;}
${SPI_ESP_IN:+delete $DST $SRC esp $SPI_ESP_IN;}
spddelete $SPD_SRC $SPD_DST any -P out;
spddelete $SPD_DST $SPD_SRC any -P in;
${EXCLUDE_SRCNET:+spddelete $SPD_SRC $SPD_SRC any -P out;}
${EXCLUDE_SRCNET:+spddelete $SPD_SRC $SPD_SRC any -P in;}
EOF

if [ "$KEYING" = "automatic" -a -n "$IKE_METHOD" ]; then
   racoontmp=$(mktemp /etc/racoon/racoon.XXXXXX)
   grep -v "^include \"/etc/racoon/$DST.conf\";" /etc/racoon/racoon.conf >> $racoontmp
   mv -f $racoontmp /etc/racoon/racoon.conf
   pidof -x /usr/sbin/racoon > /dev/null 2>&1 && killall -HUP /usr/sbin/racoon
fi

/etc/sysconfig/network-scripts/ifdown-post $CONFIG