Jwendl.NET

These are the session that I plan on going to for the TCCC in April of 2011

Sunday 4/9

• 07:30 - 08:00: Bus to Campus / Drive to Campus
• 08:15 - 08:45: Doors Open - Continental Breakfast
• 08:45 - 09:00: Welcome
• 09:00 - 10:15: Enhancing User Experiences With Reactive Extensions (3-230)
• 10:15 - 10:30: Break
• 10:30 - 11:45: Getting Dirty With Windows Phone 7 (3-230)
• 11:45 - 12:45: Lunch
• 12:45 - 02:00: MVVM in the Real World (3-230)
• 02:00 - 02:15: Break
• 02:15 - 03:30: Developing a Windows Phone 7 App for Business Users (3-230)
• 03:30 - 03:45: Break
• 03:45 - 05:00: Getting Started with MultiScreen Development using Silverlight and MVVM (3-230)
• 05:00 - 05:30: Closing Remarks and Prize Giveaway in 3-210

Sunday 4/10

• 07:30 - 08:00: Bus to Campus / Drive to Campus
• 08:15 - 08:45: Doors Open - Continental Breakfast
• 08:45 - 09:00: Welcome
• 09:00 - 10:15: More Velocity Without More Hours (3-230)
• 10:15 - 10:30: Break
• 10:30 - 11:45: Making the Leap to Freelance Programming (3-230)
• 11:45 - 12:45: Lunch
• 12:45 - 02:00: "I Didn't Know You Could Do That!" – .Net Tips and Tricks (3-210)
• 02:00 - 02:15: Break
• 02:15 - 03:30: Build a N-Tier App with Entity Framework, WCF Data Services, and ASP.NET MVC (3-115)
• 03:30 - 03:45: Break
• 03:45 - 05:00: Secure Coding Practices for .NET (3-210)
• 05:00 - 05:30: Closing Remarks and Prize Giveaway in 3-210

I am pretty excited for a good majority of the sessions, some of the other sessions might just be filler. Every year I go to this event I learn something new!

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Making your own home router for $500.00 (or less)

Getting sick of trying various consumer level SOHO routers, I decided to take my abilities to the next level. I wanted to build and configure my own gateway / router box.

There are several steps to accomplish to do this yourself, and hopefully this post will illustrate the steps that I took. The first step is to choose an operating system. Any flavor of linux will follow similar steps below, but personal I knew and trusted Gentoo http://www.gentoo.org/ over the other flavors. If I were really paranoid about security though, I would probably go with a linux distribution like Net BSD or similarly hardened linux distributions.

The second step that I took was to obtain the hardware. Your mileage may vary, but here is what I bought:

• Intel Core 2 Duo E7400 Wolfdale 2.8GHz LGA 775 65W Dual-Core Processor Model BX80571E7400 - Retail

http://www.newegg.com/Product/Product.aspx?Item=N82E16819115206

• LITE-ON Black IDE DVD-ROM Drive Model iHDP118-04 - OEM

http://www.newegg.com/Product/Product.aspx?Item=N82E16827106274

• APEX DM-318 Black Steel MicroATX Slim Case Computer Case ATX12V Flex 275W Power Supply - Retail

http://www.newegg.com/Product/Product.aspx?Item=N82E16811154062

• LINKSYS EG1032 10/ 100/ 1000Mbps PCI Network Adapter - Retail

http://www.newegg.com/Product/Product.aspx?Item=N82E16833124120

• ASUS P5KPL-CM LGA 775 Intel G31 Micro ATX Intel Motherboard - Retail

http://www.newegg.com/Product/Product.aspx?Item=N82E16813131288

• Mushkin Enhanced Blackline 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory Model 996684 - Retail

http://www.newegg.com/Product/Product.aspx?Item=N82E16820226048

• Seagate Barracuda 7200.10 ST380815AS 80GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive

http://www.newegg.com/Product/Product.aspx?Item=N82E16822148231

• D-Link DWA-556 Xtreme N PCI Express Desktop Adapter

http://www.amazon.com/gp/product/B000N4WRFY/ref=ox_ya_oh_product

A few things to note about the hardware. The first is that the wireless card is probably the toughest choice. If you get the wrong card for your linux distribution, you will end up placing a lot of RMA requests. I personally went through 3 different card vendors until I settled on the card that I got.

Another thing to note, is the price. You can cut corners here and there to reduce my cost of $500.00 to something more in line with SOHO routers. This article will entirely be based on the hardware that I have selected above.

The third step is to get all of your reference websites in order. Here are the links that I used as a reference:

• http://www.gentoo.org/doc/en/handbook/handbook-amd64.xml?full=1
• http://www.gentoo.org/doc/en/home-router-howto.xml
• http://en.gentoo-wiki.com/wiki/Wireless/Access_point
  
  The fourth step is to download the operating system. I went with x86_64 gentoo live cd.

http://gentoo.chem.wisc.edu/gentoo/releases/amd64/current-iso/

I choose to download the install-amd64-minimal-<date>.iso file Then simply you follow the directions to install Gentoo located in the handbook http://www.gentoo.org/doc/en/handbook/handbook-amd64.xml?full=1 When I finished installing Gentoo, I installed the following packages using portage:

• app-admin/sudo
• app-admin/syslog-ng
• app-arch/unzip
• app-editors/vim
• app-misc/screen
• app-portage/eix
• net-analyzer/bmon
• net-analyzer/iptraf
• net-dns/bind-tools
• net-dns/dnsmasq
• net-firewall/iptables
• net-misc/bridge-utils
• net-misc/dhcpcd
• net-misc/ntp
• net-wireless/hostapd
• net-wireless/iw
• net-wireless/wireless-tools
• sys-apps/pciutils
• sys-apps/slocate
• sys-boot/grub
• sys-kernel/gentoo-sources
• sys-process/vixie-cron
• www-client/lynx
  
  I then followed the instructions at http://www.gentoo.org/doc/en/home-router-howto.xml

After those instructions, I went to http://en.gentoo-wiki.com/wiki/Wireless/Access_point After all of the above steps were done, the real fun begins. Configuring the files to do what I want them to do.

I personally set everything up like a bridged connection http://en.gentoo-wiki.com/wiki/Wireless/Access_point.

One more thing to note, is that the wireless card I used (D-Link DWA-556 Xtreme N PCI Express Desktop Adapter) works with the latest kernel (2.6.30-gentoo-r5 at the time of this writing). You will need to use hostapd to run it in "master" mode (that is the ability to run as a wireless access point instead of just another wireless node). The driver that you want to use in hostapd is 'driver=nl80211'. Also, the driver that you want to use for the wireless is AR5418. Currently you can only run in 802.11g mode (not n, even though the card supports it). That means you have an upgrade path, once n is supported you don't need to replace the card.

I would love to hear from other people who DIY with home routing. Please leave a comment with packages that you use on your system, or good utilities that you run to keep your home network going.

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Today while looking for information about Dungeons and Dragons 4.0 I found some sad news that I feel is very news worthy. Gary Gygax passed away today. May his inspiration and talent shine through on all of us each day, and may he find solace in his new place of rest.

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While working on a school project using wxPython and XML I was intrigued by the way that Python wants you to handle XML. You have three options, 1) expat, 2) SAX or 3) DOM. All three methods happen to be very disgusting to implement. I decided that it would be worth time spent to find a good way to convert XML to an extensible object structure. I actually found that method at this URL http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/149368. The best part of this snippet is that you can call an elements name, get their child, get the name of the child, get an attribute all really fast (because the author used expat).

for child in element.children :
	if child.name == "Panel" : 
		pnl = wxPanel(frame, pos=(child.getAttribute("x"), child.getAttribute("y")), size=(child.getAttribute("width"), child.getAttribute("height"))) 
		for control in child.children : 
			self.setControl(pnl, control) panels.append(pnl) 
		else : 
			self.setControl(frame, child)

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Here is the answer to one question the interviewer gave me:

#include <iostream.h>
using namespace std;

// toLower
char *toLower(char *ptr);
int main() {
   char *test = new char[251];
   cout << "Enter a string to lower : ";
   cin.getline(test, 250);
   toLower(test);
   cout << "The result is : " << test << endl;
}

char *toLower(char *ptr) {
   while (*ptr != '\0') {
      if (*ptr > 'A' && *ptr < 'Z') {
         *ptr -= 'A' - 'a';
      }
      *ptr++;
   }
   return ptr;
}

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