CSV to vcf/vcard converter (advanced edit android contact).

Spreadsheets are great! But only if you could use them to manage contacts, specially in your Android phone (or any standard compliant phone which can export to vcard).

So we got vcf2csv to do the conversion. This program will blindly convert all fields in the vcard (including the standard fields like version) to columns in the generated tab separated CSV. And that's just we want.

Now you got to convert it back to VCF so you can import it to your (standard compliant) phone. To do so, convert using the script (Released under Apache license :p) --

#!/usr/bin/ruby
require 'csv.rb'
header = nil
counter = 0
CSV.foreach(ARGV[0], { :col_sep ="\t", :quote_char ='!' }) {
 |row|
 if counter == 0
  header = row.dup
 else
  puts "BEGIN:VCARD"
  row.each_with_index {
   |data, index|
   if data != nil
    puts "#{header[index]}:#{data}"
   end
  }
  puts "END:VCARD"
 end
 counter += 1
}

First argument is the path of the tab separated CSV to convert. The output of the program is the converted VCARD. It simply converts the columns to vcard fields

(semi)Static IPv6 for AWS.

EIP does not support IPv6, but you can still do it as long as you don't delete you VPC or make changes to your subnet.

In the Interface page of your EC2 instance, there's an option to add more IPv6 address (like you can do with IPv4 address); in fact, there maybe a default IPv6 address depending on if you opted for one.

You just add an IPv6 address to the interface -- you'll have control over it, you can remove it from one instance attach it to another (but only in the same subnet).

Ultimate traffic shaping script (low prioritize/background your P2P/torrent/Bitcoin/gnutella/edonkey/emule traffic).

Sick of P2P traffic (like Bitcoin, torrents) hogging your Internet connection? This's the solution. It gives HTTP(S), SMPT, DNS, IMAP, POP etc... ports high priority over other ports.

It's to be realized that QoS works only at the point where the traffic is throttled. Since you have no control over your ISPs network throttle, you wont be able to get a working QoS unless you throttle your traffic manually on your local system and apply a QoS there. The same goes for incoming(ingress) and outgoing(egress) traffic.

Linux has the capability to do so via tc commands (belongs to the iproute2 package).

You need to fill in the variables to effectively get the script to work.
devspeed is the speed of your Internet connection, inetdev is the interface over which you get your internet connection. inetUspeed, inetspeed is your upload and download Internet speed.

The units are in K or M bits per second.

After filing up the variables, copy paste the commands to your root shell. If the commands result in errors, you can try and upgrade to a newer version of iproute2 and upgrade the kernel.

The script works well, but don't expect things like SSH to work like... in real time. You'll see considerable delay with these real time apps.

And yes, ICMP has not been given a high priority.

devspeed=100mbit
inetdev=eth1
inetUspeed=10000kbit
inetspeed=10000kbit
tc qdisc add dev $inetdev ingress
tc filter add dev $inetdev parent ffff: protocol ip prio 1 u32 match ip src 192.168.0.0/16 flowid 10:1
modprobe ifb numifbs=1
tc filter add dev $inetdev parent ffff: protocol ip prio 10 u32 match u32 0 0 flowid 11:1 action mirred egress redirect dev ifb0
tc qdisc add dev ifb0 root handle 1: cbq avpkt 1400b bandwidth $inetspeed
tc class add dev ifb0 parent 1: classid 1:1 cbq allot 1400b prio 0 bandwidth $inetspeed rate $inetspeed avpkt 1400 bounded isolated
tc filter add dev ifb0 parent 1: protocol ip prio 16 u32 match u32 0 0 flowid 1:1
tc qdisc add dev ifb0 parent 1:1 handle 2: cbq avpkt 1400b bandwidth $inetspeed
tc class add dev ifb0 parent 2: classid 2:1 cbq allot 1400b prio 1 rate $inetspeed avpkt 1400 maxburst 1000 bandwidth $inetspeed
tc class add dev ifb0 parent 2: classid 2:2 cbq allot 1400b prio 8 rate $inetspeed avpkt 1400 maxburst 1 bandwidth $inetspeed
tc filter add dev ifb0 parent 2: protocol ip prio 1 u32 match ip sport 443 0xffff flowid 2:1
tc filter add dev ifb0 parent 2: protocol ip prio 1 u32 match ip sport 80 0xffff flowid 2:1
tc filter add dev ifb0 parent 2: protocol ip prio 1 u32 match ip sport 25 0xffff flowid 2:1
tc filter add dev ifb0 parent 2: protocol ip prio 1 u32 match ip sport 143 0xffff flowid 2:1
tc filter add dev ifb0 parent 2: protocol ip prio 1 u32 match ip sport 993 0xffff flowid 2:1
tc filter add dev ifb0 parent 2: protocol ip prio 1 u32 match ip sport 465 0xffff flowid 2:1
tc filter add dev ifb0 parent 2: protocol ip prio 1 u32 match ip sport 8080 0xffff flowid 2:1
tc filter add dev ifb0 parent 2: protocol ip prio 1 u32 match ip sport 53 0xffff flowid 2:1
tc filter add dev ifb0 parent 2: protocol ip prio 10 u32 match u32 0 0 flowid 2:2
ip link set up dev ifb0
tc qdisc add dev $inetdev root handle 1: cbq avpkt 1400b bandwidth $devspeed
tc class add dev $inetdev parent 1: classid 1:1 cbq allot 1400b prio 0 bandwidth $devspeed rate $devspeed avpkt 1400
tc class add dev $inetdev parent 1: classid 1:2 cbq allot 1400b prio 0 bandwidth $inetUspeed rate $inetUspeed avpkt 1400 bounded maxburst 1 bandwidth $inetUspeed
tc filter add dev $inetdev parent 1: protocol ip prio 1 u32 match ip dst 192.168.0.0/16 flowid 1:1
tc filter add dev $inetdev parent 1: protocol ip prio 10 u32 match u32 0 0 flowid 1:2
tc qdisc add dev $inetdev parent 1:2 handle 2: cbq avpkt 1400b bandwidth $inetUspeed
tc class add dev $inetdev parent 2: classid 2:1 cbq allot 1400b prio 1 rate $inetUspeed avpkt 1400 maxburst 1000 bandwidth $inetUspeed
tc class add dev $inetdev parent 2: classid 2:2 cbq allot 1400b prio 8 rate $inetUspeed avpkt 1400 maxburst 1 bandwidth $inetUspeed
tc filter add dev $inetdev parent 2: protocol ip prio 1 u32 match ip sport 443 0xffff flowid 2:1
tc filter add dev $inetdev parent 2: protocol ip prio 1 u32 match ip sport 80 0xffff flowid 2:1
tc filter add dev $inetdev parent 2: protocol ip prio 1 u32 match ip sport 8080 0xffff flowid 2:1
tc filter add dev $inetdev parent 2: protocol ip prio 1 u32 match ip sport 65111 0xffff flowid 2:1
tc filter add dev $inetdev parent 2: protocol ip prio 10 u32 match u32 0 0 flowid 2:2