#!/bin/bash
#
#####################################
# bruno@cdcorp.com.br 22/10/04 #
# levanta tunnel adsl #
#####################################

PATH=/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

# gateway da LP
LPGW=200.232.63.201

# speedy
SPEEDY=200.207.207.65
IPTABLES=/sbin/iptables

# Testa acesso ao gateway da LP
if ping -c 2 -i 1 -q $LPGW > /dev/null 2>&1; then
        echo "PING OK"
if route -n | grep $SPEEDY > /dev/null;then
    echo "ROTA SPEEDY ENCONTRADA..DELETANDO..."
    route del default gw $SPEEDY > /dev/null
    echo "ROTA SPEEDY DELETADA"
    route add default gw $LPGW > /dev/null
    echo "ROTA LP adicionada"
    echo "Iniciando regras de firewall"
    $IPTABLES -t nat -D POSTROUTING 1 > /dev/null
    $IPTABLES -t nat -A POSTROUTING -i eth0 -j MASQUERADE > dev/null
    echo "REGRAS DE FIREWALL OK"
        fi

                # tudo ok
                echo "OK..SAINDO"
                exit 0
                
else
                echo "SENAO...."

              echo "Caso a LP esteja down"
          
   echo "verifica se existe rota da LP, se existir deleta"
   if route -n | grep $LPGW > /dev/null; then
   route del default gw $LPGW > /dev/null
   fi
    echo "adiciono a rota default da speedy"
    route add default gw $SPEEDY > /dev/null
    echo "rota adicionada"
    $IPTABLES -t nat -D POSTROUTING 1 > /dev/null
    $IPTABLES -t nat -A POSTROUTING -i eth2 -j MASQUERADE > /dev/null
    echo "regras de firewall adicionadas"

        fi
done