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Получение статических маршрутов по DHCP

dhclient-exit-hooks

#!/bin/sh
 
if [ x"$new_rfc3442_classless_static_routes" != x"" ]; then
    if [ x"$reason" == x"BOUND" -o x"$reason" == x"REBOOT" ]; then
        rfc_routes=($new_rfc3442_classless_static_routes)

        for(( i=0; i < ${#rfc_routes[@]}; )); do
            net_length=${rfc_routes[$i]}
            ((i++))

            net_address=(0 0 0 0)
            for(( j=0; j < $[$net_length / 8 + ($net_length % 8 ? 1 : 0)]; j++, i++)); do
                net_address[$j]=${rfc_routes[$i]}
            done

            gateway=(0 0 0 0)
            for (( j=0; j < 4; j++, i++ )); do
                gateway[$j]=${rfc_routes[$i]}
            done

            old_IFS="$IFS"
            IFS='.'

            if [[ -n "$(which ip 2>/dev/null)" ]]; then
                ip route replace "${net_address[*]}/$net_length" via "${gateway[*]}"
            else
                if [[ -n "$(which route 2>/dev/null)" ]]; then
                    if [ x"$net_length" == x"32" ]; then
                        route add -host "${net_address[*]}" gw "${gateway[*]}"
                    else
                        route add -net "${net_address[*]}/$net_length" gw "${gateway[*]}"
                    fi
                fi
            fi

            IFS="$old_IFS"
        done
    fi
fi
 
 
if [ x"$new_ms_classless_static_routes" != x"" ]; then
    if [ x"$reason" == x"BOUND" -o x"$reason" == x"REBOOT" ]; then
        ms_routes=($new_ms_classless_static_routes)

        for(( i=0; i < ${#ms_routes[@]}; )); do
            net_length=${ms_routes[$i]}
            ((i++))

            net_address=(0 0 0 0)
            for(( j=0; j < $[$net_length / 8 + ($net_length % 8 ? 1 : 0)]; j++, i++)); do
                net_address[$j]=${ms_routes[$i]}
            done

            gateway=(0 0 0 0)
            for (( j=0; j < 4; j++, i++ )); do
                gateway[$j]=${ms_routes[$i]}
            done

            old_IFS="$IFS"
            IFS='.'

            if [[ -n "$(which ip 2>/dev/null)" ]]; then
                ip route replace "${net_address[*]}/$net_length" via "${gateway[*]}"
            else
                if [[ -n "$(which route 2>/dev/null)" ]]; then
                    if [ x"$net_length" == x"32" ]; then
                        route add -host "${net_address[*]}" gw "${gateway[*]}"
                    else
                        route add -net "${net_address[*]}/$net_length" gw "${gateway[*]}"
                    fi
                fi
            fi

            IFS="$old_IFS"
        done
    fi
fi