thebends.org/~allen
TABLE OF CONTENTS
1. INTRODUCTION ..................................................... 1
2. CODE ............................................................. 1
2.1 Misc .......................................................... 1
2.2 iPhone ........................................................ 2
2.3 AVR ........................................................... 2
2.4 libnatpmp ..................................................... 2
2.5 utunnel ....................................................... 2
2.6 btunnel ....................................................... 2
2.7 ythread ....................................................... 3
2.8 yhttp ......................................................... 3
2.9 ArpSpyX ....................................................... 3
2.10 jspng ......................................................... 3
2.11 MotionScreen .................................................. 4
2.12 ramdisk ....................................................... 4
2.13 memedit ....................................................... 4
2.14 yprofile ...................................................... 4
2.15 libypeer ...................................................... 4
2.16 open-tracker .................................................. 4
3. MUSIC PROJECTS ................................................... 3
3.1 Mansion ....................................................... 4
3.2 SYN | ACK ..................................................... 4
3.3 Resolver ...................................................... 4
3.4 Sincerity Principle ........................................... 5
REFERENCES ........................................................... 4
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1. INTRODUCTION
My name is Allen Porter and I'm a software engineer at Google. In my
spare time I toy with unix / os x stuff, networking stuff, and
music stuff. Just business here, i'll leave the personal stuff for
my facebook/myspace page.
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2. CODE
I enjoy writing code, and have posted some of it here with the hopes
that someone else may find it useful. Feel free to do whatever you
want with it, but let me know if you have any sugestions,
improvements, or anything interesting on these subjects that you
think I might be interested in. See the REFERENCES section for
code that I like that other people have written.
Most of the code here was written for a proof of concept, and probably
is more interesting to read than to run (it most likely won't do what
you want right out of the box).
Most of my code can now be found at googlecode.
2.1. Misc
I have a pile of misc code snippets, that cover the following topics:
Networking
Some code dealing with sniffing or munging packets. Topics include
AIM sniffing, arp packet creation/sniffng, bounjour tunneling,
playing with icmp.
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Mach-O
A few examples of playing with Mach-O binary formats such as
parsing, looking at vm space used, and stuff data into new
sections.
Other
Other misc Mac OS X code such as displaying network interfaces,
querying i2c devices, querying spotlight, and playing with the
mach api and tasks.
2.2. iPhone
The iPhone is a realy fun (and powerful) platform for mobile
application development. Too bad apple didn't release an SDK
for the iphone (the web one doesn't count); the developers had to
make their own. Hey, apple finally released their SDK!. See my
iphone page which has details about the pre-SDK iPhone projects I
worked on, including (iPhoneDisk the MacFUSE plugin, and
MobileTerminal).
2.3. AVR
I like playing with Atmel AVR microcontrollers, especially when
mixing them with networks. See my AVR page for more details,
including some photos and links to code I've written related to
serial I/O and networking.
2.4. libnatpmp
NAT-PMP is a protocol for routers to allow internal clients to
create port forwarding entries dynamically. I wrote a library
for speaking nat-pmp, and a few tools to go along with it.
Someone else wrote a library called libnatpmp
after I did, but isn't interested in changing the name. They
also plastered it all over the web. Too bad for me, I guess.
2.5. utunnel
Written using libnet and pcap, utunnel allows you to tunnel IP
traffic over udp. Only tested on BSD based unixes, it may be a
little rough around the edges, so use at your own risk.
2.6. btunnel
A work in progress, btunnel (bonjour tunnel) is a tool for
tunneling bonjour packets between networks. While bonjour and
mDNS are usually LAN based, Its not clear if other methods that
I haven't read enough about yet might work better, using
existing protocols. I think I would rather expose my zero
configuration services to my trusted friends only.
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2.7. ythread
ythread is a simple C++ thread/mutex library that wraps the
pthread library. I wanted a simple way to create threads from my
C++ applications and thought maybe someone might find this simple
set of classes useful.
2.8. yhttp
HTTP is everywhere, so why not link an HTTP server into all of your
long running processes? yhttp is a very basic HTTP server library.
I like the idea of ditching the bloated standalone HTTP server +
server side code in favor of a small binaries that do one thing,
and do it well. You probably already always have a web browser
open, so exposing status of your long running applications over
HTTP seems more useful than stdout. (I'm not claiming credit for
coming up with this idea, but I think its something I would like
to see more of).
This library is the result of a weekend of work and is nowhere near
complete (it doesn't support all of the protocol, for example),
but I was able to get a hello world out of it.
2.9. ArpSpyX
ArpSpyX is an arp packet sniffer for OS X that I found useful for
surveying my little home network. It was also an excuse to dabble
in Objective-C / Cocoa. Also see arpdropper for injecting
arbitrary arp request and arp reply packets.
2.10. jspng
jspng is a library to create PNG images written entirely
in javascript, mostly as a proof of concept. I'm not aware of any
other similar libraries, which is a shame (though I understand,
because it seems a bit slow to make anything that looks good).
To create an image, you just need to give it an array of pixels.
It renders the image with src="data:image/png;base64,...", where
the base64 encoded png is created on the fly. See the unit tests
for implementation details.
I would love to hear from any javascript experts who can speed it
up. Also, let me know if you use the code for anything useful,
or if you end up doing the work to make it support color, etc.
Mostly, i'm curious if anyone else found the RFC as hard to
understand as I did!
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2.11. MotionScreen
MotionScreen is an OS X application that uses an iSight camera to
transpose foreground images on some background. See a screenshot
to get an idea. You first select a background image, then a take
a reference snapshot and jump in front of the camera. Using motion
or differences from a scene seemed like a good way to make a quick
and dirty "green screen". See the code and disk image.
2.12. ramdisk
Just for fun, a MacFUSE based ramdisk.
2.13. memedit
A tool for manipulating memory of a running process. Uses the mach
API and zone introspection to iterate over regions of heap memory
allocated to a running task, as well as a mode for reading and
writing these regions (using mach_vm_read/mach_vm_write). Have a
look at the source.
2.14. yprofile
A simple memory profile, currently supporting the ability to
report memory leaks. This library overrides malloc and free
to track memory allocation and reports memory leaks on shutdown.
Browse the source.
2.15. libypeer
Why not use public bittorrent trackers for finding peers for
things other than filesharing? They seem pretty reliable and
have a nice peer discovery mechanism (a shared secret). The
libypeer library is written in C++ and does just that. Go
check out the source.
2.16. open-tracker
I needed a server to test out libypeer, so open-tracker was born.
This tracker was built on Google's App Engine infrastructure,
written in python. Go post a torrent, but keep it legal. Also,
feel free to use it for non-torrent projects. The announce url:
http://tracker.thebends.org/announce
3. MUSIC PROJECTS
I like to play and record music, and sometimes play and record with
others. See the REFERENCES section for music projects that I
am a fan of.
3.1. Mansion
You can hear Mansion at myspace.com. Mansion is also known to play
shows on occasion and is rumored to have some newer recordings
floating around somewhere.
3.2. SYN|ACK
In my spare time I work on SYN|ACK. Stay tuned, this still a work
in progress.
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3.3. Resolver
Resolver is no longer an active project, but you can still hear
some music and see some photos on resolvermusic.com. See Lily White
to hear what some of the other members are up to these days (they
rock).
3.4. Sincerity Principle
Sincerity Principle hasn't had much action in a while, but I hear
that something new music might be in the making.
REFERENCES
Here you will find a collection of references that I have found
interesting useful, or enjoyable. Consider this my "now reading"
or "currently listening to" section, as these references should
change often (hopefully).
Feeds
[1] Google Hot Trends (feed)
[2] Allen's Shared Items (feed)
[3] Pownce: Allen P. (feed
[4] del.icio.us (feed)
[5] Twitter / allenporter (feed)
Computing
[1] Distributed Hash Table
[2] nologin - code
[3] make_evil.py
[4] Interposing
[5] iPhone Toolchain Installation
[6] iphone-binuils
[7] SWF/FLV File Format Specification
[8] Apple Accessory Protocol
[9] RFC 2131 - Dynamic Host Configuration Protocol
[10] EDTP Electronics
[11] Phrack 64
[12] Abusing Mach on Mac OS X
Music
[1] Jucifer: A Partridge In A Pear Tree (DVD)
[2] Lily White
[3] First Wave Hello
[4] Japanese Sunday
[5] Frank Records
[6] Hans Keller
[7] Sleeping People
Periodicals
[1] Official blog of the metasploit project
[2] Uninformed
[3] jacobian.org : Article Archive
[4] NPR: Intelligence Squarred
[5] Diggnation
[6] Techdirt
[7] Worse than Failure
[8] tales from the red shed
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