#!/bin/sh
#============================================================================
# Default Xen network start/stop script.
# Xend calls a network script when it starts.
# The script name to use is defined in /etc/xen/xend-config.sxp
# in the network-script field.
#
# This script creates a bridge (default xen-br0), adds a device
# (default eth0) to it, copies the IP addresses from the device
# to the bridge and adjusts the routes accordingly.
#
# If all goes well, this should ensure that networking stays up.
# However, some configurations are upset by this, especially
# NFS roots. If the bridged setup does not meet your needs,
# configure a different script, for example using routing instead.
#
# Usage:
#
# network (start|stop|status) {VAR=VAL}*
#
# Vars:
#
# bridge The bridge to use (default xen-br0).
# netdev The interface to add to the bridge (default eth0).
# antispoof Whether to use iptables to prevent spoofing (default yes).
#
# start:
# Creates the bridge and enslaves netdev to it.
# Copies the IP addresses from netdev to the bridge.
# Deletes the routes to netdev and adds them on bridge.
#
# stop:
# Removes netdev from the bridge.
# Deletes the routes to bridge and adds them to netdev.
#
# status:
# Print ifconfig for netdev and bridge.
# Print routes.
#
#============================================================================
# Exit if anything goes wrong.
set -e
# First arg is the operation.
OP=$1
shift
# Pull variables in args in to environment.
for arg ; do export "${arg}" ; done
bridge=${bridge:-xen-br0}
netdev=${netdev:-eth0}
antispoof=${antispoof:-yes}
echo "network $OP bridge=$bridge netdev=$netdev antispoof=$antispoof"
# Usage: transfer_addrs src dst
# Copy all IP addresses (including aliases) from device $src to device $dst.
transfer_addrs () {
local src=$1
local dst=$2
# Don't bother if $dst already has IP addresses.
if ip addr show dev ${dst} | egrep -q '^ *inet ' ; then
return
fi
# Address lines start with 'inet' and have the device in them.
# Replace 'inet' with 'ip addr add' and change the device name $src
# to 'dev $src'. Remove netmask as we'll add routes later.
ip addr show dev ${src} | egrep '^ *inet ' | sed -e "
s/inet/ip addr add/
s@\([0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+\)/[0-9]\+@\1@
s/${src}/dev ${dst}/
" | sh -e
}
# Usage: transfer_routes src dst
# Get all IP routes to device $src, delete them, and
# add the same routes to device $dst.
# The original routes have to be deleted, otherwise adding them
# for $dst fails (duplicate routes).
transfer_routes () {
local src=$1
local dst=$2
# List all routes and grep the ones with $src in.
# Stick 'ip route del' on the front to delete.
# Change $src to $dst and use 'ip route add' to add.
ip route list | grep ${src} | sed -e "
h
s/^/ip route del /
P
g
s/${src}/${dst}/
s/^/ip route add /
P
d
" | sh -e
}
# Usage: create_bridge dev bridge
# Create bridge $bridge and add device $dev to it.
create_bridge () {
local dev=$1
local bridge=$2
# Don't create the bridge if it already exists.
if ! brctl show | grep -q ${bridge} ; then
brctl addbr ${bridge}
brctl stp ${bridge} off
brctl setfd ${bridge} 0
fi
ifconfig ${bridge} up
}
# Usage: antispoofing dev bridge
# Set the default forwarding policy for $dev to drop.
# Allow forwarding to the bridge.
antispoofing () {
local dev=$1
local bridge=$2
iptables -P FORWARD DROP
iptables -A FORWARD -m physdev --physdev-in ${dev} -j ACCEPT
}
# Usage: show_status dev bridge
# Print ifconfig and routes.
show_status () {
local dev=$1
local bridge=$2
echo '============================================================'
ifconfig ${dev}
ifconfig ${bridge}
echo ' '
ip route list
echo ' '
route -n
echo '============================================================'
}
op_start () {
if [ "${bridge}" == "null" ] ; then
return
fi
# Create the bridge and give it the interface IP addresses.
# Move the interface routes onto the bridge.
create_bridge ${netdev} ${bridge}
transfer_addrs ${netdev} ${bridge}
transfer_routes ${netdev} ${bridge}
# Don't add $dev to $bridge if it's already on a bridge.
if ! brctl show | grep -q ${netdev} ; then
brctl addif ${bridge} ${netdev}
fi
if [ ${antispoof} == 'yes' ] ; then
antispoofing ${netdev} ${bridge}
fi
}
op_stop () {
if [ "${bridge}" == "null" ] ; then
return
fi
# Remove the interface from the bridge.
# Move the routes back to the interface.
brctl delif ${bridge} ${netdev}
transfer_routes ${bridge} ${netdev}
# It's not our place to be enabling forwarding...
}
case ${OP} in
start)
op_start
;;
stop)
op_stop
;;
status)
show_status ${netdev} ${bridge}
;;
*)
echo 'Unknown command: ' ${OP}
echo 'Valid commands are: start, stop, status'
exit 1
esac
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/*
Copyright 2013 Mathias Andersson <wraul@dbox.se>
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "backlight.h"
#include "eeconfig.h"
#include "debug.h"
backlight_config_t backlight_config;
/** \brief Backlight initialization
*
* FIXME: needs doc
*/
void backlight_init(void)
{
/* check signature */
if (!eeconfig_is_enabled()) {
eeconfig_init();
}
backlight_config.raw = eeconfig_read_backlight();
if (backlight_config.level > BACKLIGHT_LEVELS) {
backlight_config.level = BACKLIGHT_LEVELS;
}
backlight_set(backlight_config.enable ? backlight_config.level : 0);
}
/** \brief Backlight increase
*
* FIXME: needs doc
*/
void backlight_increase(void)
{
if(backlight_config.level < BACKLIGHT_LEVELS)
{
backlight_config.level++;
}
backlight_config.enable = 1;
eeconfig_update_backlight(backlight_config.raw);
dprintf("backlight increase: %u\n", backlight_config.level);
backlight_set(backlight_config.level);
}
/** \brief Backlight decrease
*
* FIXME: needs doc
*/
void backlight_decrease(void)
{
if(backlight_config.level > 0)
{
backlight_config.level--;
backlight_config.enable = !!backlight_config.level;
eeconfig_update_backlight(backlight_config.raw);
}
dprintf("backlight decrease: %u\n", backlight_config.level);
backlight_set(backlight_config.level);
}
/** \brief Backlight toggle
*
* FIXME: needs doc
*/
void backlight_toggle(void)
{
bool enabled = backlight_config.enable;
dprintf("backlight toggle: %u\n", enabled);
if (enabled)
backlight_disable();
else
backlight_enable();
}
/** \brief Enable backlight
*
* FIXME: needs doc
*/
void backlight_enable(void)
{
if (backlight_config.enable) return; // do nothing if backlight is already on
backlight_config.enable = true;
if (backlight_config.raw == 1) // enabled but level == 0
backlight_config.level = 1;
eeconfig_update_backlight(backlight_config.raw);
dprintf("backlight enable\n");
backlight_set(backlight_config.level);
}
/** \brief Disable backlight
*
* FIXME: needs doc
*/
void backlight_disable(void)
{
if (!backlight_config.enable) return; // do nothing if backlight is already off
backlight_config.enable = false;
eeconfig_update_backlight(backlight_config.raw);
dprintf("backlight disable\n");
backlight_set(0);
}
/** /brief Get the backlight status
*
* FIXME: needs doc
*/
bool is_backlight_enabled(void)
{
return backlight_config.enable;
}
/** \brief Backlight step through levels
*
* FIXME: needs doc
*/
void backlight_step(void)
{
backlight_config.level++;
if(backlight_config.level > BACKLIGHT_LEVELS)
{
backlight_config.level = 0;
}
backlight_config.enable = !!backlight_config.level;
eeconfig_update_backlight(backlight_config.raw);
dprintf("backlight step: %u\n", backlight_config.level);
backlight_set(backlight_config.level);
}
/** \brief Backlight set level
*
* FIXME: needs doc
*/
void backlight_level(uint8_t level)
{
if (level > BACKLIGHT_LEVELS)
level = BACKLIGHT_LEVELS;
backlight_config.level = level;
backlight_config.enable = !!backlight_config.level;
eeconfig_update_backlight(backlight_config.raw);
backlight_set(backlight_config.level);
}
/** \brief Get backlight level
*
* FIXME: needs doc
*/
uint8_t get_backlight_level(void)
{
return backlight_config.level;
}
#ifdef BACKLIGHT_BREATHING
/** \brief Backlight breathing toggle
*
* FIXME: needs doc
*/
void backlight_toggle_breathing(void)
{
bool breathing = backlight_config.breathing;
dprintf("backlight breathing toggle: %u\n", breathing);
if (breathing)
backlight_disable_breathing();
else
backlight_enable_breathing();
}
/** \brief Enable backlight breathing
*
* FIXME: needs doc
*/
void backlight_enable_breathing(void)
{
if (backlight_config.breathing) return; // do nothing if breathing is already on
backlight_config.breathing = true;
eeconfig_update_backlight(backlight_config.raw);
dprintf("backlight breathing enable\n");
breathing_enable();
}
/** \brief Disable backlight breathing
*
* FIXME: needs doc
*/
void backlight_disable_breathing(void)
{
if (!backlight_config.breathing) return; // do nothing if breathing is already off
backlight_config.breathing = false;
eeconfig_update_backlight(backlight_config.raw);
dprintf("backlight breathing disable\n");
breathing_disable();
}
/** \brief Get the backlight breathing status
*
* FIXME: needs doc
*/
bool is_backlight_breathing(void)
{
return backlight_config.breathing;
}
#endif
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