AsiaBSDCon 2013 - Timetable
AsiaBSDCon 2013
Tokyo University of Science, Tokyo, Japan
14-17 March, 2013
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Time Table
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Language:
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JA
Registration
Delegate (non-student): 14,000JPY
(until 17:00, February 28, 2013, JST)
18,000JPY (at and after 17:01, February 28, 2013, or on site)
Student: 3,000JPY
Banquet ticket on 16th: Delegate 6,000JPY, Student: 3,000JPY.
This registration fee includes name card, printed proceedings,
T-shirt, and tickets of lunch during the last two days and a small dinner on the last day. Banquet on 16th needs banquet ticket (not included in the registration).
Note that you need to register even if you are planning to attend one of the tutorial sessions or meetings in the first two days and not to attend the last two days.
REGISTER ON-LINE FROM HERE!
Tutorial Fees
Half-day Tutorial (T3, in Japanese): 3,000JPY/class (2,000JPY for students)
Half-day Tutorial (others, in English): 5,000JPY/class (2,000JPY for students)
This tutorial fee includes printed materials.
Hotel Accommodations (see also
Access Map
AsiaBSDCon organizing committee recommends
HotelsCombined.com
to find your hotel accommodation. The location keyword "Tokyo Dome" would be useful for you to find hotels near the venue (see also
Access Map
).
Please contact
if you need support and/or have a specific question about the accommodation.
Conference Timetable
NOTE: this page will be updated when
more detailed information is available.
iCalendar file for the timetable is here.
Day 1 (March 14, 2013) - Tutorials and Small Meetings I
Please note that Day 1 is for tutorials and meetings only.
No exhibition and no paper session for unregistered attendees to them.
Room A
Room B
Room C
09:30 - 12:30
Tutorial T1:
FreeBSD Storage Options
Paul Schenkeveld
Meeting M1:
FreeBSD Developer Summit (invited only)
13:30 - 16:30
Tutorial T2:
Nobody Ever Regretted Making a Backup
Dan Langille
17:00 - 19:00
Tutorial T3:
Kerberos Authentication Basics (in Japanese)
Hiroki Sato
Day 2 (March 15, 2013) - Tutorials and Small Meetings II
Please note that Day 2 is for tutorials and meetings only.
No exhibition and no paper session for unregistered attendees to them.
Room A
Room B
Room C
09:30 - 12:30
Tutorial T4:
Bootstrap Puppet master using FreeBSD
Edward Tan
Meeting M1:
FreeBSD Developer Summit (invited only)
13:30 - 17:00
*BSD Vendor Summit
(invited only)
Day 3 (March 16, 2013) - Paper Session I
Room A
Room B
09:50 - 10:00
Opening
10:00 - 11:00
P1A: FreeNAS Plugins (everything you ever wanted to know)
John Hixson (
P1B: OpenIKED
Reyk Floeter (
11:00 - 12:00
P2A: MCLinker - the final toolchain frontier
Joerg Sonnenberger (
P2B: NPF in NetBSD 6
S.P.Zeidler (
12:00 - 13:30
Lunch
13:30 - 15:00
K1: 64bit SMP NetBSD OS Porting for TILE-Gx VLIW Many-Core Processor
Toru Nishimura (
15:00 - 15:30
Break
15:30 - 16:30
P3A: Automating the deployment of FreeBSD & PC-BSD® systems
Kris Moore (
P3B: Perfect(ing) hashing in NetBSD
Joerg Sonnenberger (
19:00 - 21:00
Banquet
Day 4 (March 17, 2013) - Paper Session II
Room A
Room B
10:00 - 11:00
P4A: Hands-on bhyve, the BSD Hypervisor
Michael Dexter (
P4B: OpenSMTPD: We deliver!
Eric Faurot (
11:00 - 12:00
P5A: Implements BIOS emulation support for BHyVe: A BSD Hypervisor
Takuya ASADA (
P5B: Using BGP for Realtime import and export of OpenBSD SPAMD entries
Peter Hessler (
12:00 - 13:30
Lunch
13:30 - 14:30
P6A: Calloutng: a new infrastructure for timer facilities in the FreeBSD kernel
Davide Italiano (
P6B: OpenBSD relayd
Reyk Floeter (
14:30-15:30
P7A: SCTP in Go
Olivier Van Acker (
P7B: the surprising complexity of checksums in TCP/IP
Henning Brauer (
15:30 - 16:00
Break
16:00 - 17:30
Work-In-Progress session
hwpmc(4) support for haswell class of Intel processors,
Hiren Panchasara
improvements to acpi_ibm(4),
Hiren Panchasara
DSPF: Datalink Shortest Path,
Motoyuki OHMORI
FreeBSD Expert Digital Edition 2013, and ARM++,
Daichi GOTO
Building a CDN for Distributing FreeBSD,
Allan Jude
Kyua in NetBSD,
Julio Merino
Netboot FreeBSD with HTTP Server,
Sean Bruno
17:30 - 20:00
Closing and Small Dinner
Keynote
K1: 64bit SMP NetBSD OS Porting for TILE-Gx VLIW Many-Core Processor
Abstract:
TILE-Gx is the 64bit 3 way VLIW many-core processor family
which has scalable multiple CPU configurations ranging from 9 to
100 core inside. The processor is constructed on a unique
on-chip switch network named iMesh technology. The switch
network is programmable inter-connect to make computing core
tightly coupled each other. iMesh works as the basis of
chip-wide cache coherency. iMesh programmability can make
dynamic CPU partitioning possible. TILE-Gx processor features
4-level protection and offers a Hypervisor to host guest OS'es
running simultaneously on CPU groups. During the process of the
porting of NetBSD to TileGX 36, the team has learned and
exploited SMP ready NetBSD kernel internal which could make
porting burdens much less than anticipated. In his presentation
the author first summarizes the distinct architectural designs
of TILE-Gx VLIW many-core processor and then describes lessons
learned by 64bit NetBSD porting. Ample number of processing
cores allows NetBSD kernel assign CPU groups to OS subsystems
like disk IO and GbE/10G network device drivers. Some of future
applications by TILE-Gx NetBSD will be mentioned as the
conclusion.
Speaker:
Toru Nishimura
is a long time UNIX engineer since
1984. During late '80s he made contributions for Japanese UUCP
network named JUNET. After completing some work as a software
contractor for a US west coast company in mid '90s, he became a
NetBSD developer at 1997. Since then he has been engaging in
NetBSD OS porting and other software developments. His
expertise covers the rise of RISC processor technologies and
evolutions from the age of early MIPS and then through Alpha,
PowerPC and ARM. In the year 2012, he joined Sanctum Networks
and got engaged on an engineering project to port NetBSD for new
hardware platforms and now pursing the lucrative many-core
applications for the compute-intensity markets like SDN, VLDB
search engine and HPC.
Tutorials
T1: FreeBSD Storage Options
Abstract:
FreeBSD offers many different ways to organize storage
space. Which configuration to choose is not always a trivial
task unless you do this frequently.
This tutorial gives an in-depth overview of filesystems,
partition managers, raid modules, encryption layers, network
storage options and boot loaders. After this overview real
world configurations will be explained so attendees will leave
this tutorial with enough information to make sensible decisions
for installing the next system.
Here's the preliminary outline of this tutorial:
Brief history of UNIX filesystems
Partitioning the UNIX way, why and how
Partitioning in the PC world: MBR, EBR
Traditional FreeBSD partitioning
Limits imposed by legacy partitioning schemes
Modern partitioning: GPT and PMBR
The original UNIX filesystem
Improvements: SYSV, FFS/UFS, soft-updates, journalling
What others did: Ext[234]fs, XFS, Reiserfs
Designed from scratch, the last word is ZFS
Bootstrapping your system, multi-stage bootloaders
Mixing and matching technologies with the GEOM framework
Overview of the most important GEOM classes
High availability: HAST
SAN solutions: iSCSI
Installer capabilities: sysinstall, BSDinstall, PC-BSD installer
Planning your FreeBSD installation
Real world examples: laptop, desktop, small server, big server
Target Audience:
Basic knowledge of (UNIX-like) operating system is assumed,
having installed such a system one or more times is
preferred.
Instructor:
Paul Schenkeveld
started programming computers while at high school when very few
students had ever seen a computer. After finishing high school he decided
to find a job as few people knew computers and demand was high. He first
met UNIX in 1983 and immediately knew this was the OS to work with. After
five jobs programming and supporting computers he became an independent
consultant for UNIX, IP networking and security.
Having worked with many commercial UNIX versions during ten years, he found
FreeBSD which he first installed when version 1.0 came out to be much more
fun to play with. Today, he spends most of his time on projects involving
(Free)BSD and, networking and security.
In the last three decades Paul has installed thousands of
computers ranging from very small embedded systems to laptops,
desktops and small and big servers. He knows like no other about
the importance of choosing the right storage layout before
starting the installation of a system.
Paul likes travelling, is active in Scouting and loves the food
his Thai wife cookes for him and their son.
T2: Nobody Ever Regretted Making a Backup
Abstract:
Nobody ever got famous writing backup software, yet backups
form one of the fundamental basics of system
administraction. There are many solutions to this simple
problem:
do nothing
ad hoc solutions
open source packages
commercial packages
Not only is it important to backup data securely and reliably, you
need to be able to restore the data. You need to know what was backed
up, from what system, when, and where is that backup now.
In the past decade, Bacula has been gaining ground on more
established solutions, both open source and proprietary. This
talk will introduce you to Bacula, show you the main components,
give you an outline of how it works, and illustrate why Bacula
is becoming so widespread.
In this tutorial, you will learn the basics of Bacula, a
leading open source backup solution. As a Bacula developer, Dan
has some unique insights into the use and deployment of Bacula.
An avid user since 2004, he has used Bacula for his own networks
and in commercial settings.
Topic to cover will include:
overview of Bacula: client, storage, director
Jobs
Schedules
Catalogs
Pools
FileSets
console commands
the various retention settings and how they affect your catalog
which database is best for use with Bacula
the difference between a Bacula volume and a disk volume
running a job
restoring a job
automatic pruning
recycling of Volumes
using tape libraries
copy/migrate jobs from one media to another
spooling
Instructor:
Dan Langille
has been using FreeBSD since 1998 and
almost immediately he started documenting his experiences. This
online journal eventually became The FreeBSD Diary. Along the
way, he founded a couple of conferences and created a few other
websites. He is very good at describing the step-by-step
procedures to perform a wide variety of tasks, from changing
your prompt to creating and maintaining jails.
T3: Kerberos Authentication Basics (in Japanese)
Abstract:
Kerberos is a well-known authentication service which can be
used in heterogeneous systems including UNIX-like OSs and
Windows. In this tutorial, the attendees will learn basics of
authentication and authorization, typical configurations and
their pros and cons, and configuration of Kerberos by using a
FreeBSD system as KDC. Other related implementations about
authentication/authorization such as PAM and directory services
like NIS and LDAP will also be explained.
Target Audience:
Basic knowledge of system administration of UNIX-like OSs is
required.
Instructor:
Hiroki Sato
is an assistant professor at Tokyo
Institute of Technology. He joined FreeBSD Project as a
committer since 2000, and has been working as a member of
Documentation Engineering Team, Release Engineering Team, and
FreeBSD Core Team, and also working as a director at FreeBSD
Foundation. He also joined the NetBSD Foundation in 2003. His
primary research areas are integrated circuit design, signal
processing, and computer architecture.
T4: Bootstrap Puppet master using FreeBSD
Objective:
Jumpstart a system administrator to use Puppet as configuration
management tool, on FreeBSD.
Abstract:
This tutorial (with lab exercise) is based on my article
in BSD Magazine issue 01/2012 (FreeBSD: Get Up-To-Date) and
talk in EuroBSDCon 2012 (Config Management in FreeBSD using
Puppet). Attendees are expected to walk out of this tutorial
with knowledge of bootstrapping Puppet on FreeBSD for server
deployment/management. The following are the topics that
will be covered:
Puppet Master
installation & configuration
writing manifest
port installation
files (configuration files or any file)
service start/stop/restart
cron jobs
reusable class
parameterized class
create file & delete files
using templates
introduction
syntax
writing templates
hook up with manifest
Puppet Client
installation & configuration
Lab Exercise
setup essential services, tools & applications
port installation
ssh
customizations files, e.g. vimrc, bashrc & others
cron jobs
deploy servers
NTPd (ISC) server
WWW (nginx) server
database (mysql) server
Both Puppet Master & Client
troubleshooting
moving on
documentation
resource relationship/dependency
some other interesting areas of Puppet
Target audience:
System administrator & developers with a bunch (more then 3)
of servers on hand to deal with:
managing configuration
disaster recovery
server deployment
Pre-requisite:
Attendees should be at least comfortable bringing up a
FreeBSD server with network connectivity. He/She should also familiar with
ports installation, basic rc operations and using a text editor.
Instructor:
Edward Tan
is a system administrator managing servers
using Puppet. His favorite operating system is FreeBSD. Most of
his free time, he plays around FreeBSD or trying to give
something back to the FreeBSD community. The rest of the time,
he note down his learning at
Meetings
M1: FreeBSD Developer Summit (invited only)
Chair:
TBA
M2: *BSD Vendor Summit (invited only)
Chair:
TBA
Papers
P1A: FreeNAS Plugins (everything you ever wanted to know)
Abstract:
When FreeNAS entered the 8.x series, many people were not
happy that functionality that previously existed was no longer
included. Such functionality was mainly multimedia focused and
targeted at the home user. Services such as bittorent, DLNA and
iTunes media services are the primary examples. Beginning with
FreeNAS 8.2.0, a plugin architecture was introduced. This
architecture allows FreeNAS systems to be extended in any way
that the user sees fit. The purpose of this session will be to
describe the technical details of how the architecture works so
that plugin authors have the knowledge to create new plugins. As
a working example, the transmission bittorrent client plugin
will be reviewed.
Author:
John Hixson
is a BSD geek that resides in
California. He has been using open source software and operating
systems since the middle 90's. He has worked as both an engineer
and systems administrator during the course of his technical
career. His employment with iXsystems keeps him busy with
FreeBSD, PC-BSD and FreeNAS. John enjoys working on anything
that is challenging and requires new knowledge to be
obtained. In his spare time, he likes to read, cook, spend time
with his family and play with new technical gadgets.
P1B: OpenIKED
Abstract:
This talk introduces the OpenIKED project, the latest
portable subproject of OpenBSD. OpenIKED is a FREE
implementation of the most advanced Internet security "Internet
Key Exchange version 2 (IKEv2)" Virtual Private Network (VPN)
protocol using the strongest security, authentication and
encryption techniques. The project was born in need of a modern
Internet Protocol Security (IPsec) implementation for OpenBSD,
but also for interoperability with the integrated IKEv2 client
since Windows 7 and to provide a compliant solution for the US
Government IPv6 (USGv6) standard. The project is still under
active development; it was started by Reyk Floeter as "iked"
for OpenBSD in 2010 but ported to other platforms including
Linux, FreeBSD and NetBSD in late 2012 using the "OpenIKED"
project name.
Author:
Reyk Floeter
works as a freelance consultant and
software developer with a focus on OpenBSD, networking, and
security. He lives in Hannover, Germany, but works with
international cus- tomers like Internet Initiative Japan
Inc. (IIJ) in Tokyo. As a member of the OpenBSD project, he
contributed various features, fixes, networking drivers and
daemons since 2004, like OpenBSD's ath, trunk, vic, hostapd,
relayd, snmpd, and iked. For more than nine years and until
mid-2011, he was the CTO & Co-Founder of .vantronix where he
gained experience in building, selling and deploying
enterprise-class network security appliances based on
OpenBSD.
P2A: MCLinker - the final toolchain frontier
Abstract:
The development of LLVM and Clang provided a working C/C++
compiler and assembler for the major platforms like X86 and
ARM. While work on the various smaller programs from GNU
binutils has been seen, no linker appeared. This talk introduces
MCLinker, a new cross-platform linker for ELF systems like the
BSD and Android. The architecture of the project is shown and
the current status on NetBSD and FreeBSD is
illustrated.
Author:
Joerg Sonnenberger
is studying mathematics and working
as contract developer for German federal agencies. He is an
active NetBSD and pkgsrc developer. Recently, his focus has
been on support of LLVM and Clang for NetBSD and the
associated library stack.
P2B: NPF in NetBSD 6
Abstract:
NPF has been released with NetBSD 6.0 as an experimental
packet filter, and thus has started to see actual use. While it
is going to take a few more cycles before it is fully
"production ready", the exposure to users has given it a strong
push to useability, and keeps finding small gaps. Fixing these
will help to evolve it from a theoretical well-designed
framework to a practical packet filtering choice. The talk will
cover distinguishing features of NPF design, give an overview of
NPFs current practical capabilities, ongoing development, and
will attempt to entice more people to try out NPF and give
feedback.
Author:
Mindaugas Rasiukevicius
is a member of the NetBSD
project since 2007, focusing on kernel development, such areas
as threading, virtual memory, synchronisation, IPC and various
others. He has a particular interest in multi-threading, high
performance and real-time computing. He currently has a
consulting company, Nox Technologies Ltd.
S.P.Zeidler
is an ex-astrophysicist who has been
working as a system administrator for the past 18 years, 12 of
these for ISPs. Her private server is still an Amiga 3000
which got NetBSD 1.0 in May 1994, and has been running NetBSD
ever since (the reader is advised to adjust expectations of
sanity accordingly). She joined TNF as a sysadmin in 2004 to
repay some of the project's work and since added roles in
pkgsrc-releng and security-team, and is currently serving as a
member of the board of TNF. Her interests are Internet
services and making sure IPv6 support doesn't bitrot.
P3A: Automating the deployment of FreeBSD & PC-BSD? systems
Abstract:
In PC-BSD 9.x every installation is fully-scripted, due to
the the pc-sysinstall backend. This backend can also be used to
quickly automate the deployment of FreeBSD servers and PC-BSD
desktops using a PXE boot environment. In PC-BSD & TrueOS? 9.1
and higher, this functionality is easy to setup and deploy using
the "pc-thinclient" utility. This utility handles the initial
setup of PXE on the host system, and provides a framework to
manage client installation configurations.
Author:
Kris Moore
is the founder and lead developer of the
most popular BSD based desktop, PC-BSD. He has authored several
unique tools for the desktop, including the PBI package
management format, and the Warden, a BSD Jails management
utility. He resides in the Knoxville area of East Tennessee with
his wife and 4 children.
P3B: Perfect(ing) hashing in NetBSD
Abstract:
Hash tables are one of the fundamental data structures used
in the different parts of the Operating System from on-disk
databases to directory caches in the kernel. To provide the
desired performance characteristics, it is crucial to keep the
collision rates minimal. If the construction of the hash table
guarantees that, it is a Perfect Hash Table. This talk gives a
short introduction in the algorithms developed in the last 20
years for this topic. It looks at the uses in NetBSD 6 like
nbperf(1) and the constant database cdb(5) as well as
work-in-progress for routing and firewalling.
Author:
Joerg Sonnenberger
is studying mathematics and working
as contract developer for German federal agencies. He is an
active NetBSD and pkgsrc developer. Recently, his focus has
been on support of LLVM and Clang for NetBSD and the
associated library stack.
P4A: Hands-on bhyve, the BSD Hypervisor
Abstract:
Now that bhyve, the BSD Hypervisor has been imported into the
FreeBSD 10-CURRENT development mainline, users and developers
can easily begin testing this exciting technology that promises
to have the same impact on FreeBSD that jails made in 2000. This
talk will take you through the history, architecture and
features of bhyve and demonstrate its capabilities.
These features include:
Disk image, zvol and iSCSI guest booting
Multiversion FreeBSD guest support
High-performance guest execution
Appliance deployment such as FreeNAS
Author:
Michael Dexter
has used BSD Unix systems since 1991
and wrote his first FreeBSD jail management system in
2005. Dissatisfied with existing multiplicity solutions, he has
sponsored the sysjail and mult multiplicity research projects
and took his BSD support public with the formation of BSD Fund
in 2007. Michael is now the Editor of Call For Testing, a BSD
technical journal and lives with his wife, daughter and son in
Portland, Oregon.
P4B: OpenSMTPD: We deliver!
Abstract:
In this paper we present the OpenSMTPD daemon: a simple,
modern and portable mail server implemented using
privilege-separation and messaging passing. Among different
features, it comes with a notably simple configuration file
format, and it offers very powerful deployment options.
We describe the internal organisation of the daemon in
different processes with very specific roles. We examine the
workflows for the main server tasks: enqueueing mails from
external sources, delivering to the local users, relaying to
external host and generating bounces. Finally, we discuss the
server modularity, especially the table and backend
APIs.
Author:
Eric Faurot
received a Ph.D. in Computer Science from
the University of Caen, France. He is currently working as an
R&D. Software Engineer for a telecom company.
He has been using OpenBSD for many years and started
contributing as a developer in 2007. He is one of the lead developers
for the OpenSMTPD project, and he has been very busy with it for the
past year.
P5A: Implements BIOS emulation support for BHyVe: A BSD Hypervisor
Abstract:
TBD
Author:
Takuya ASADA
P5B: Using BGP for Realtime import and export of OpenBSD SPAMD entries
Abstract:
In the battle against SPAM, many mail server admins collect and
distribute IP addresses of systems that sent them SPAM. However,
distribution of these lists are traditionally limited to 2 methods. #1
is periodically downloading this list from a source, usually a web
server often causing massive load and slowness at the top of the hour.
#2 is a real-time lookup against an external provider (such as dns-rbls)
so your response time is dependent on how fast they respond or timeout.
This talk suggests and discusses a 3rd solution: using BGP to
distribute the IP addresses in a real-time manner.
Author:
Peter Hessler
is 32 and lives in Zurich
Switzerland. Originally from San Francisco he has an interest in
how things work. He moved to Germany in 2008 and then to
Switzerland in 2013. In his spare time, Peter enjoys drinking
beer and bad puns.
P6A: Calloutng: a new infrastructure for timer facilities in the FreeBSD kernel
Abstract:
In BSD kernels, timers are provided by the callout facility,
which allows to register a function with an argument to be
called at specified future time. The current design of this
subsystem suffer of some problems, such as the impossibility of
handling high-resolution events or its inherent periodic
structure, which may lead to spurious wakeups and higher power
consumptions. Some consumers, such as high-speed networking,
VoIP and other real-time applications need a better precision
than the one currently allowed. Also, especially with the
ubiquity of laptops in the last years, the energy wasted by
interrupts waking CPUs from sleep may be a sensitive factor. In
this paper we present new design and implementation of the
callout facility, which tries to address those long standing
issues, proposing also a new program- ming interfaces to take
advantage of the new features.
Author:
Davide Italiano
has a degree in Computer Engineering
and is an active FreeBSD developer. His main interest is kernel
programming. Recently he worked worked on a redesign of the
callout(9) facility, supported by the Google Summer of Code
program.
Alexander Motin
P6B: OpenBSD relayd
Abstract:
relayd first appeared in OpenBSD 4.1, formerly called
hoststated, to provide a service that helps Server Load
Balancing (SLB) with OpenBSD's PF. It was written by
Pierre-Yves Ritschard and Reyk Floeter. The daemon initially
provided health checking capabilities of monitored backend
servers and the ability to dynamically load PF tables and "rdr"
L3-redirections based on the configuration and active hosts. It
has been extended with support for L7-relaying of various
protocols including TCP, UDP, HTTP, DNS, and SSL with optional
transparent proxying capabilities and evolved into an
Application Level Gateway (ALG). This talk introduces some of
the latest enhancements, including the redesigned filtering
subsystem for relays, socket splicing support for enhanced
performance, integrated SSL interception or "SSL
Man-in-the-middle (MITM)" support, and the new suite of
regression tests.
Author:
Reyk Floeter
works as a freelance consultant and
software developer with a focus on OpenBSD, networking, and
security. He lives in Hannover, Germany, but works with
international cus- tomers like Internet Initiative Japan
Inc. (IIJ) in Tokyo. As a member of the OpenBSD project, he
contributed various features, fixes, networking drivers and
daemons since 2004, like OpenBSD's ath, trunk, vic, hostapd,
relayd, snmpd, and iked. For more than nine years and until
mid-2011, he was the CTO & Co-Founder of .vantronix where he
gained experience in building, selling and deploying
enterprise-class network security appliances based on
OpenBSD.
P7A: SCTP in Go
Abstract:
The author describes their successful attempt to combine two
relatively new technologies: Stream Control Transmission
Protocol (SCTP) and the programming language Go, achieved by
extending the existing Go network library with SCTP.
SCTP is a reliable, message-oriented transport layer protocol,
similar to TCP and UDP. It offers sequenced delivery of messages
over multiple streams, network fault tolerance via multihoming
support, resistance against flooding and masquerade attacks and
congestion avoidance procedures. It has improvements over
wider-established network technologies and is gradually gaining
traction in the telecom and Internet industries.
Go is an open source, concurrent, statically typed, compiled
and garbage-collected language, developed by Google Inc. Go's
main design goals are simplicity and ease of use and it has a
syntax broadly similar to C. Go has good support for networked
and multicore computing and as a system language is often used
for networked applications, however it doesn't yet support
SCTP.
By combining SCTP and Go, software engineers can exploit the
advantages of both technologies. The implementation of SCTP
extending the Go network library was done on FreeBSD and Mac OS
X - the two operating systems that contain the most up to date
implementation of the SCTP specification.
Author:
Olivier Van Acker
is a software engineer and architect
with over fifteen years of IT experience, ten of which were
spent in the broadcast industry, starting as a broadcast
engineer building broadcast vans specifically tailored for live
video streaming and broadcasting major festivals in northern
Europe. He worked as a software engineer and architect on
several IPTV projects, including the BBC iPlayer project, a huge
on-demand video application with millions of users
daily. Recently he moved into game development and is now
heading the technical team at Mind Candy the creator of Moshi
Monsters, a fun online world where kids can adopt their very own
monster, go on adventures, play games, solve puzzles, be
creative, and communicate with their friends. He has a MSc in
Computer Science from Birkbeck University, London.
P7B: the surprising complexity of checksums in TCP/IP
Abstract:
TCP and IP have well known and well understood checksum
mechanisms. The actual checksum math is easy and, from a
performance standpoint, so cheap that it can be considered
free. In the process of improving the use of hardware checksum
offloading engines, recalculating the IP checksum has been found
to be essentialy free. However, that is not the case for the TCP
and UDP checksums, which was partially expected. On further
inspection a surprising complexity in dealing with the protocol
checksums has been found. We'll look at how these checksums are
calculated, where the complexity comes from, how an ancient BSD
performance hack made it into hardware offloading engines, the
stack interaction and issues with hardware offloading
engines.
Author:
Henning Brauer
is 34 and lives in Hamburg, Germany. He
is running the Internet Service Provider "BS Web Services"
there, and has done so for about 15 years. He joined OpenBSD in
2002 and has been working on many things, most network related,
since. He started OpenBGPD and OpenNTPD, the framework he has
written for bgpd is used by almost all newer daemons in
OpenBSD. He has been working on the OpenBSD packet filter, pf,
from the beginning and has architected and written a very large
fraction of today's pf. Whe he's not hacking you can find him
mountain biking, traveling and hiking or in one of the many bars
in his neighborhood with his friends, enjoying brewer's art and
often playing tabletop soccer.
US