master-thesis/doc/plan.org

* Time table / log
|      When? | What?                                                                      | Notes |
| 2019-02-21 | Kick-Off                                                                   | x     |
|            | Finish all admin points                                                    | x     |
|            | Know when/how to coordinate                                                | x     |
| 2019-02-21 | Clarifications Ueli Maurer (Mentor)                                        | x     |
|            | Write mail / phone                                                         | x     |
| 2019-02-22 | Have all papers handed in                                                  |       |
|            |                                                                            |       |
| 2019-02-22 | Have rough definition of tasks                                             |       |
| 2019-03-01 | Feature list / priority list / roadmap clear                               |       |
| 2019-03-08 | NAT46 1:1 table TCP/UDP working                                            |       |
| 2019-03-15 | NAT46 1:1 table ICMP, ICMPv6 working                                       |       |
|            | Will need some switch local ip addresses                                   |       |
|            |                                                                            |       |
| 2019-03-29 | Jool SIIT / range / offset support https://www.jool.mx/en/run-vanilla.html |       |
|            | Jool EAMT support https://www.jool.mx/en/run-eam.html                      |       |
|            | Bidirectional support                                                      |       |
|            | Will need IPv6 embedding suport https://tools.ietf.org/html/rfc6052        |       |
|            |                                                                            |       |
| 2019-04-05 | NAT64 prefix based IPv6->IPv4 conversion [tayga]                           |       |
|            | Use case: IPv6 hosts send to specific /96                                  |       |
|            |                                                                            |       |
| 2019-04-19 | NAT64 dynamic pool implementation: n:m ipv6 to ipv4 mapping                |       |
|            | And n:1 stateful mappings https://www.jool.mx/en/run-nat64.html            |       |
|            | Needs active controller                                                    |       |
|            | Needs timeout / leases                                                     |       |
| 2019-05-10 | Benmarking results between P4, Jool, Tayga                                 |       |
|            | Real hardware of advantage                                                 |       |
|            |                                                                            |       |
| 2019-08-01 | Latest start writing documentation                                         |       |
| 2019-08-21 | hand in thesis                                                             |       |
* Topics / Tasks
** Admin
*** DONE Clarify PDF / form with Denise Spicher: free form description
*** TODO Create task description to be handed in mystudies
*** DONE Create list of tasks / initial brainstorming
*** TODO Get OK from Ueli Maurer that thesis is valid in Information Security Area
*** TODO Find out how-when-whom-where to meet / define schedule
*** TODO Latex and/or org-mode for the thesis?
*** TODO Add initial milestones
**** 180d plan
**** 25w
** Thesis implementation
*** DONE Setup test VM for P4: 2a0a:e5c0:2:12:400:f0ff:fea9:c3e3
*** DONE Get feature list of jool
*** DONE Get feature list of tayga
*** TODO Setup P4 base / structure
*** TODO Setup test VM [dual stack] for Jool:
*** TODO Setup test VM [dual stack] for tayga:
*** NAT64/NAT46 Features in jool and tayga
**** TODO Static 1:1 NAT46: translate from IPv4 to IPv6 with a table
***** TODO TCP
***** TODO UDP
***** TODO ICMP <-> ICMPv6
**** TODO Stateless Prefix based NAT64: IPv6 to IPv4 translation prefix based
***** Allows IPv6 hosts to reach the IPv4 Internet
**** See time table above
*** Additional features queue (to be discussed)
**** TODO Offset based translation (v4->v6) -> same as range (?)
****
** Thesis documentation
*** Motivation
    TBD
*** Translation mechanisms
    - v4 to v6 / vice versa
    - Stateful / stateless
    - static / dynamic
**** Explicit Address Mappings Table (EAMT)
     Range based mapping tables
     See https://www.jool.mx/en/eamt.html,
     https://tools.ietf.org/html/rfc7757

*** Current state of the art tayga/jool
     TBD
**** Tayga
     - Single threaded
     - Multi threaded work started due to initiative of ungleich /
       Chrisrock [IPv6.chat]
**** Jool
     - EAMT bidirectional only (!)

IPtables interaction

```

user@T:~# # Create a Jool iptables instance named "example."
user@T:~# # Also, establish that the IPv6 representation of any IPv4 address should be
user@T:~# # `2001:db8::<IPv4 address>`. (See sections below for examples.)
user@T:~# jool_siit instance add "example" --iptables  --pool6 2001:db8::/96
user@T:~#
user@T:~# # Tell iptables which traffic should be handled by our newly-created instance:
user@T:~#
user@T:~# # IPv6: only packets from 2001:db8::198.51.100.8/125 to 2001:db8::192.0.2
user@T:~# ip6tables -t mangle -A PREROUTING \
>		-s 2001:db8::198.51.100.8/125 -d 2001:db8::192.0.2.0/120 \
>		-j JOOL_SIIT --instance "example"
user@T:~# # IPv4: Only packets from 192.0.2 to 198.51.100.8/29
user@T:~# iptables  -t mangle -A PREROUTING \
>		-s 192.0.2.0/24 -d 198.51.100.8/29 \
>		-j JOOL_SIIT --instance "example"
```
5656
**** Cisco (?)
*** P4 based implementation
    TBD
**** General
     - IPv6 subnet 2001:db8::/32
     - IPv6 hosts are in 2001:db8:6::/64
     - IPv6 default router (::/0) is 2001:db8:6::42/64
     - IPv4 mapped Internet "NAT64 prefix" 2001:db8:4444::/96 (should
       go into a table)
     - IPv4 hosts are in 10.0.4.0/24
     - IPv6 in IPv4 mapped hosts are in 10.0.6.0/24
     - IPv4 default router = 10.0.0.42

**** Static mappings
      - likely need table(s)
      - need tcp & udp translation
***** Hosts
****** Left side: IPv6
****** Right side: IPv4
**** Requirements
     -
*** Performance comparison
*** Feature/Functionality difference / overview
**** Not included
     - DNS64 - has already been solved in a different domain
*** References / Follow up
**** RFC 6052: https://tools.ietf.org/html/rfc6052  IPv6 Addressing of IPv4/IPv6 Translators
**** RFC 6586 for deployment experiences using Stateful NAT64.
**** RFC 7757 Explicit Address Mappings for Stateless IP/ICMP Translation
**** EAMT/Jool: https://www.jool.mx/en/eamt.html
* Proposal / task description
** Task description for mystudies
*** High speed NAT64 with P4
Currently there are two main open source NAT64 solution available:
tayga and jool. The former is a single threaded, cpu bound user
space solution, the latter a custom Linux kernel module.

This thesis challenges this status quo by developing a P4 based
solution supporting all features of jool/tayga and comparing the
performance, security and adaptivity of the solutions.

- Milestone 1: Stateless NAT64/NAT46 translations in P4
- Milestone 2: Stateful (dynamic) NAT64/NAT46 translations
- Milestone 3: Hardware adaption


** Original ideas
Proposal 1: Automating NAT64 with P4

In IPv6 only data centers IPv4 connectivity is still a business
requirement. Current state of the art methods include layer 7 proxying
or static assignments. both featuring static assignments.

A flexible, dynamic assignment of IPv4 addresses to IPv6 hosts, similar
to lease times in DHCPv4 and prefix delegations in DHCPv6 could reduce
the pressure on IPv4 addresses.

I would suggest the develop of a new protocol (likely UDP embedded) that
allows hosts to request on-network support for IPv4 addresses. As IPv4
addresses have to be treated as "expensive", an accounting metric has to
be introduced. While in the business world this is usually related to
money, in the network world IPv4 users could be paying the network by
(reduced) bandwidth.

If such a metric existed, devices attached to the network could also try
to negotiate and wait for using IPv4, when the price / penality for IPv4
is low (this might be very suitable for mail exchangers for instance).


Proposal 2: High speed NAT64 with P4

Currently there are two main open source NAT64 solution available:
tayga[0] and jool[1]. The former is a single threaded, cpu bound user
space solution, the latter a custom Linux kernel module.

I would like to challenge this status quo and develop a P4 based
solution supporting all features of jool/tayga and comparing the
performance and adaptivity of the solutions.

[0] http://www.litech.org/tayga/
[1] https://www.jool.mx/en/index.html


Proposal 3: Challenging the status quo with IPv10

The de facto standard in networking is to treat IPv4
and IPv6 as "impossible to combine". This proposal is
to challenge this notion with three different methods:

- Extensions to IPv4 to request remote IPv6 transport
- Extensions to IPv6 to request remote IPv4 transport
- Support in network equipment to handle the extensions

As the IPv4 header does not allow embedding IPv6 addresses due to size
limitations, embedding the destination address in a secondary header
might be necessary (possibly encapsulated in UDP).