fixroutes

#!/bin/bash

function new_link ()
{
    if [[ -n $LINK ]] && [[ -n $INET ]] && [[ -n $ACTIVE ]]; then
        echo "$LINK"
    fi
    LINK=`expr "$1" : '\(.*\): flags=.*'`
    INET=""
    ACTIVE=""
}

function find_links ()
{
    IFS=$'\n'
    for LINE in `ifconfig`; do
        if [[ $LINE != $'\t'* ]]; then new_link "$LINE"; fi
        if [[ $LINE =~ "inet " ]]; then INET="$LINE"; fi
        if [[ $LINE =~ "status: " ]] && ! [[ $LINE =~ inactive ]]; then ACTIVE="TRUE"; fi
    done
    unset IFS
    new_link "$LINE"
}

function flush ()
{
    RETRIES=10
    while [ $RETRIES -gt 0 ]; do
        if [ $RETRIES -eq 10 ]; then echo -n "Flushing routes."; else echo -n '.'; fi
        OUT=`route -n flush 2>&1`
        RET=$?
        if [[ $RET -eq 0 ]] && [[ -z $OUT ]]; then break; fi
        sleep 1
        let "RETRIES--"
        if [ $RETRIES -eq 0 ]; then
            echo " Failed"
            exit 1
        fi
    done
    echo " Done"
}


# Main

LINK=""
INET=""
ACTIVE=""

# Verify root
if [ `id -u` -ne 0 ]; then
    echo "Must be root"
    exit 1
fi

# Flush routes
flush

# Loop over interfaces, reset each
IFS=$'\n'
for LINK in `find_links`; do
    echo "Resetting link $LINK"
    ifconfig $LINK down
    ifconfig $LINK up
done
unset IFS