<h3>Entries from November 2013.</h3>
+ <div class="entry">
+ <div class="title">
+ <a href="http://people.skolelinux.org/pere/blog/All_drones_should_be_radio_marked_with_what_they_do_and_who_they_belong_to.html">All drones should be radio marked with what they do and who they belong to</a>
+ </div>
+ <div class="date">
+ 21st November 2013
+ </div>
+ <div class="body">
+ Drones, flying robots, are getting more and more popular. The most
+know ones are the killer drones used by some government to murder
+people they do not like without giving them the chance of a fair
+trial, but the technology have many good uses too, from mapping and
+forest maintenance to photography and search and rescue. I am sure it
+is just a question of time before "bad drones" are in the hands of
+private enterprises and not only state criminals but petty criminals
+too. The drone technology is very useful and very dangerous. To have
+some control over the use of drones, I agree with Daniel Suarez in his
+TED talk
+"<a href="http://www.ted.com/talks/daniel_suarez_the_kill_decision_shouldn_t_belong_to_a_robot.html">The
+kill decision shouldn't belong to a robot</a>", where he suggested this
+little gem to keep the good while limiting the bad use of drones:</p>
+
+<blockquote>
+
+<p>Each robot and drone should have a cryptographically signed
+I.D. burned in at the factory that can be used to track its movement
+through public spaces. We have license plates on cars, tail numbers on
+aircraft. This is no different. And every citizen should be able to
+download an app that shows the population of drones and autonomous
+vehicles moving through public spaces around them, both right now and
+historically. And civic leaders should deploy sensors and civic drones
+to detect rogue drones, and instead of sending killer drones of their
+own up to shoot them down, they should notify humans to their
+presence. And in certain very high-security areas, perhaps civic
+drones would snare them and drag them off to a bomb disposal facility.</p>
+
+<p>But notice, this is more an immune system than a weapons system. It
+would allow us to avail ourselves of the use of autonomous vehicles
+and drones while still preserving our open, civil society.</p>
+
+</blockquote>
+
+<p>The key is that <em>every citizen</em> should be able to read the
+radio beacons sent from the drones in the area, to be able to check
+both the government and others use of drones. For such control to be
+effective, everyone must be able to do it. What should such beacon
+contain? At least formal owner, purpose, contact information and GPS
+location. Probably also the origin and target position of the current
+flight. And perhaps some registration number to be able to look up
+the drone in a central database tracking their movement. Robots
+should not have privacy. It is people who need privacy.</p>
+
+ </div>
+ <div class="tags">
+
+
+ Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/robot">robot</a>, <a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet</a>, <a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance</a>.
+
+
+ </div>
+ </div>
+ <div class="padding"></div>
+
+ <div class="entry">
+ <div class="title">
+ <a href="http://people.skolelinux.org/pere/blog/Lets_make_a_wireless_community_network_in_Oslo_.html">Lets make a wireless community network in Oslo!</a>
+ </div>
+ <div class="date">
+ 13th November 2013
+ </div>
+ <div class="body">
+ <p>Today NUUG and Hackeriet announced
+<a href="http://www.nuug.no/news/Bli_med___bygge_dugnadsnett_for_alle_i_Oslo.shtml">our
+plans to join forces and create a wireless community network in
+Oslo</a>. The workshop to help people get started will take place
+Thursday 2013-11-28, but we already are collecting the geolocation of
+people joining forces to make this happen. We have
+<a href="https://github.com/petterreinholdtsen/meshfx-node/blob/master/oslo-nodes.geojson">9
+locations plotted on the map</a>, but we will need more before we have
+a connected mesh spread across Oslo. If this sound interesting to
+you, please join us at the workshop. If you are too impatient to wait
+15 days, please join us on the IRC channel
+<a href="irc://irc.freenode.net/%23nuug">#nuug on irc.freenode.net</a>
+right away. :)</p>
+
+ </div>
+ <div class="tags">
+
+
+ Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network</a>, <a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug</a>.
+
+
+ </div>
+ </div>
+ <div class="padding"></div>
+
+ <div class="entry">
+ <div class="title">
+ <a href="http://people.skolelinux.org/pere/blog/Running_TP_Link_MR3040_as_a_batman_adv_mesh_node_using_openwrt.html">Running TP-Link MR3040 as a batman-adv mesh node using openwrt</a>
+ </div>
+ <div class="date">
+ 10th November 2013
+ </div>
+ <div class="body">
+ <p>Continuing my research into mesh networking, I was recommended to
+use TP-Link 3040 and 3600 access points as mesh nodes, and the pair I
+bought arrived on Friday. Here are my notes on how to set up the
+MR3040 as a mesh node using
+<a href="http://www.openwrt.org/">OpenWrt</a>.</p>
+
+<p>I started by following the instructions on the OpenWRT wiki for
+<a href="http://wiki.openwrt.org/toh/tp-link/tl-mr3040">TL-MR3040</a>,
+and downloaded
+<a href="http://downloads.openwrt.org/snapshots/trunk/ar71xx/openwrt-ar71xx-generic-tl-mr3040-v2-squashfs-factory.bin">the
+recommended firmware image</a>
+(openwrt-ar71xx-generic-tl-mr3040-v2-squashfs-factory.bin) and
+uploaded it into the original web interface. The flashing went fine,
+and the machine was available via telnet on the ethernet port. After
+logging in and setting the root password, ssh was available and I
+could start to set it up as a batman-adv mesh node.</p>
+
+<p>I started off by reading the instructions from
+<a href="http://wirelessafrica.meraka.org.za/wiki/index.php?title=Antoine's_Research">Wireless
+Africa</a>, which had quite a lot of useful information, but
+eventually I followed the recipe from the Open Mesh wiki for
+<a href="http://www.open-mesh.org/projects/batman-adv/wiki/Batman-adv-openwrt-config">using
+batman-adv on OpenWrt</a>. A small snag was the fact that the
+<tt>opkg install kmod-batman-adv</tt> command did not work as it
+should. The batman-adv kernel module would fail to load because its
+dependency crc16 was not already loaded. I
+<a href="https://dev.openwrt.org/ticket/14452">reported the bug</a> to
+the openwrt project and hope it will be fixed soon. But the problem
+only seem to affect initial testing of batman-adv, as configuration
+seem to work when booting from scratch.</p>
+
+<p>The setup is done using files in /etc/config/. I did not bridge
+the Ethernet and mesh interfaces this time, to be able to hook up the
+box on my local network and log into it for configuration updates.
+The following files were changed and look like this after modifying
+them:</p>
+
+<p><tt>/etc/config/network</tt></p>
+
+<pre>
+
+config interface 'loopback'
+ option ifname 'lo'
+ option proto 'static'
+ option ipaddr '127.0.0.1'
+ option netmask '255.0.0.0'
+
+config globals 'globals'
+ option ula_prefix 'fdbf:4c12:3fed::/48'
+
+config interface 'lan'
+ option ifname 'eth0'
+ option type 'bridge'
+ option proto 'dhcp'
+ option ipaddr '192.168.1.1'
+ option netmask '255.255.255.0'
+ option hostname 'tl-mr3040'
+ option ip6assign '60'
+
+config interface 'mesh'
+ option ifname 'adhoc0'
+ option mtu '1528'
+ option proto 'batadv'
+ option mesh 'bat0'
+</pre>
+
+<p><tt>/etc/config/wireless</tt></p>
+<pre>
+
+config wifi-device 'radio0'
+ option type 'mac80211'
+ option channel '11'
+ option hwmode '11ng'
+ option path 'platform/ar933x_wmac'
+ option htmode 'HT20'
+ list ht_capab 'SHORT-GI-20'
+ list ht_capab 'SHORT-GI-40'
+ list ht_capab 'RX-STBC1'
+ list ht_capab 'DSSS_CCK-40'
+ option disabled '0'
+
+config wifi-iface 'wmesh'
+ option device 'radio0'
+ option ifname 'adhoc0'
+ option network 'mesh'
+ option encryption 'none'
+ option mode 'adhoc'
+ option bssid '02:BA:00:00:00:01'
+ option ssid 'meshfx@hackeriet'
+</pre>
+<p><tt>/etc/config/batman-adv</tt></p>
+<pre>
+
+config 'mesh' 'bat0'
+ option interfaces 'adhoc0'
+ option 'aggregated_ogms'
+ option 'ap_isolation'
+ option 'bonding'
+ option 'fragmentation'
+ option 'gw_bandwidth'
+ option 'gw_mode'
+ option 'gw_sel_class'
+ option 'log_level'
+ option 'orig_interval'
+ option 'vis_mode'
+ option 'bridge_loop_avoidance'
+ option 'distributed_arp_table'
+ option 'network_coding'
+ option 'hop_penalty'
+
+# yet another batX instance
+# config 'mesh' 'bat5'
+# option 'interfaces' 'second_mesh'
+</pre>
+
+<p>The mesh node is now operational. I have yet to test its range,
+but I hope it is good. I have not yet tested the TP-Link 3600 box
+still wrapped up in plastic.</p>
+
+ </div>
+ <div class="tags">
+
+
+ Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network</a>, <a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug</a>.
+
+
+ </div>
+ </div>
+ <div class="padding"></div>
+
+ <div class="entry">
+ <div class="title">
+ <a href="http://people.skolelinux.org/pere/blog/Debian_init_d_boot_script_example_for_rsyslog.html">Debian init.d boot script example for rsyslog</a>
+ </div>
+ <div class="date">
+ 2nd November 2013
+ </div>
+ <div class="body">
+ <p>If one of the points of switching to a new init system in Debian is
+<a href="http://thomas.goirand.fr/blog/?p=147">to get rid of huge
+init.d scripts</a>, I doubt we need to switch away from sysvinit and
+init.d scripts at all. Here is an example init.d script, ie a rewrite
+of /etc/init.d/rsyslog:</p>
+
+<p><pre>
+#!/lib/init/init-d-script
+### BEGIN INIT INFO
+# Provides: rsyslog
+# Required-Start: $remote_fs $time
+# Required-Stop: umountnfs $time
+# X-Stop-After: sendsigs
+# Default-Start: 2 3 4 5
+# Default-Stop: 0 1 6
+# Short-Description: enhanced syslogd
+# Description: Rsyslog is an enhanced multi-threaded syslogd.
+# It is quite compatible to stock sysklogd and can be
+# used as a drop-in replacement.
+### END INIT INFO
+DESC="enhanced syslogd"
+DAEMON=/usr/sbin/rsyslogd
+</pre></p>
+
+<p>Pretty minimalistic to me... For the record, the original sysv-rc
+script was 137 lines, and the above is just 15 lines, most of it meta
+info/comments.</p>
+
+<p>How to do this, you ask? Well, one create a new script
+/lib/init/init-d-script looking something like this:
+
+<p><pre>
+#!/bin/sh
+
+# Define LSB log_* functions.
+# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
+# and status_of_proc is working.
+. /lib/lsb/init-functions
+
+#
+# Function that starts the daemon/service
+
+#
+do_start()
+{
+ # Return
+ # 0 if daemon has been started
+ # 1 if daemon was already running
+ # 2 if daemon could not be started
+ start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
+ || return 1
+ start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- \
+ $DAEMON_ARGS \
+ || return 2
+ # Add code here, if necessary, that waits for the process to be ready
+ # to handle requests from services started subsequently which depend
+ # on this one. As a last resort, sleep for some time.
+}
+
+#
+# Function that stops the daemon/service
+#
+do_stop()
+{
+ # Return
+ # 0 if daemon has been stopped
+ # 1 if daemon was already stopped
+ # 2 if daemon could not be stopped
+ # other if a failure occurred
+ start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME
+ RETVAL="$?"
+ [ "$RETVAL" = 2 ] && return 2
+ # Wait for children to finish too if this is a daemon that forks
+ # and if the daemon is only ever run from this initscript.
+ # If the above conditions are not satisfied then add some other code
+ # that waits for the process to drop all resources that could be
+ # needed by services started subsequently. A last resort is to
+ # sleep for some time.
+ start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON
+ [ "$?" = 2 ] && return 2
+ # Many daemons don't delete their pidfiles when they exit.
+ rm -f $PIDFILE
+ return "$RETVAL"
+}
+
+#
+# Function that sends a SIGHUP to the daemon/service
+#
+do_reload() {
+ #
+ # If the daemon can reload its configuration without
+ # restarting (for example, when it is sent a SIGHUP),
+ # then implement that here.
+ #
+ start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
+ return 0
+}
+
+SCRIPTNAME=$1
+scriptbasename="$(basename $1)"
+echo "SN: $scriptbasename"
+if [ "$scriptbasename" != "init-d-library" ] ; then
+ script="$1"
+ shift
+ . $script
+else
+ exit 0
+fi
+
+NAME=$(basename $DAEMON)
+PIDFILE=/var/run/$NAME.pid
+
+# Exit if the package is not installed
+#[ -x "$DAEMON" ] || exit 0
+
+# Read configuration variable file if it is present
+[ -r /etc/default/$NAME ] && . /etc/default/$NAME
+
+# Load the VERBOSE setting and other rcS variables
+. /lib/init/vars.sh
+
+case "$1" in
+ start)
+ [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
+ do_start
+ case "$?" in
+ 0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+ 2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+ esac
+ ;;
+ stop)
+ [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
+ do_stop
+ case "$?" in
+ 0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+ 2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+ esac
+ ;;
+ status)
+ status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
+ ;;
+ #reload|force-reload)
+ #
+ # If do_reload() is not implemented then leave this commented out
+ # and leave 'force-reload' as an alias for 'restart'.
+ #
+ #log_daemon_msg "Reloading $DESC" "$NAME"
+ #do_reload
+ #log_end_msg $?
+ #;;
+ restart|force-reload)
+ #
+ # If the "reload" option is implemented then remove the
+ # 'force-reload' alias
+ #
+ log_daemon_msg "Restarting $DESC" "$NAME"
+ do_stop
+ case "$?" in
+ 0|1)
+ do_start
+ case "$?" in
+ 0) log_end_msg 0 ;;
+ 1) log_end_msg 1 ;; # Old process is still running
+ *) log_end_msg 1 ;; # Failed to start
+ esac
+ ;;
+ *)
+ # Failed to stop
+ log_end_msg 1
+ ;;
+ esac
+ ;;
+ *)
+ echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
+ exit 3
+ ;;
+esac
+
+:
+</pre></p>
+
+<p>It is based on /etc/init.d/skeleton, and could be improved quite a
+lot. I did not really polish the approach, so it might not always
+work out of the box, but you get the idea. I did not try very hard to
+optimize it nor make it more robust either.</p>
+
+<p>A better argument for switching init system in Debian than reducing
+the size of init scripts (which is a good thing to do anyway), is to
+get boot system that is able to handle the kernel events sensibly and
+robustly, and do not depend on the boot to run sequentially. The boot
+and the kernel have not behaved sequentially in years.</p>
+
+ </div>
+ <div class="tags">
+
+
+ Tags: <a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem</a>, <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
+
+
+ </div>
+ </div>
+ <div class="padding"></div>
+
<div class="entry">
<div class="title">
<a href="http://people.skolelinux.org/pere/blog/Browser_plugin_for_SPICE__spice_xpi__uploaded_to_Debian.html">Browser plugin for SPICE (spice-xpi) uploaded to Debian</a>
<li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
-<li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (1)</a></li>
+<li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (5)</a></li>
</ul></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (7)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (12)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (13)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (89)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (90)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (142)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (224)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (228)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (21)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (3)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (5)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (25)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (236)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (156)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (158)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (8)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (2)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (8)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (9)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (32)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (33)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (9)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (20)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (21)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (1)</a></li>
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