tcr

Special emissions testing build of T2

Using t2-build, we can generate a special version of kmod-rt2x00-lib.ipk and kmod-rt2800-lib.ipk that allows modification of testing parameters at runtime.

• Link to the patched file: https://gist.github.com/tcr/9d1c0442bd7d494c336a
• saved to ./openwrt/package/kernel/mac80211/patches/999-tim_did_a.patch

Explicitly run make package/kernel/mac80211/compile V=s -C openwrt or the full build process. Find the file by running

tcr

Tessel Stack (also in descending order of complexity):

Level	Stack	Repo
User / Module Code	JS	(Many)
CLI	JS	t2-cli
Tessel Library	Linux / JS / Comms	t2-firmware
SSH/GPIO Daemons	Linux / C	t2-firmware
OpenWRT	Linux / C / Shell / More	t2-firmware
Firmware	C / Comms	t2-firmware

tcr

diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index 1274b85..56b3d00 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -38,11 +38,141 @@
 #include <linux/slab.h>
 #include <linux/clk.h>
 #include <linux/of.h>
+#include <linux/stat.h>
 

tcr

Tessel 2 is seeking FCC approval. Tessel 2 runs OpenWRT, a distribution of Linux designed as open firmware for routers with very granular control over wireless capabilities. Currently Tessel 2 is stuck in FCC approval pending its demonstration of being able to generate packets in the 802.11n range.

Testing instructions

Installation on a Tessel 2:

opkg update
opkg install tcpdump
wget https://kevinmehall.net/tmp/packetspammer -O /usr/bin/packetspammer

tcr

from __future__ import print_function
import sys
import six
from gevent import socket
from gevent.queue import Queue
from gevent.socket import wait_read
import gevent

def parse_arg(arg):
    (proto, role, port) = arg.split(':')

tcr

node_modules
out

tcr

VAGRANTFILE_API_VERSION = "2"
 
Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  config.ssh.username = "root"
  config.ssh.password = "tessel2" 
  config.ssh.shell = "ash"
 
  config.vm.synced_folder ".", "/vagrant", disabled: true
 
  config.vm.box = "technicalmachine/tessel2"

tcr

VAGRANTFILE_API_VERSION = "2"

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  config.ssh.username = "root"
  config.ssh.password = "tessel2" 
  config.ssh.shell = "ash"

  config.vm.synced_folder ".", "/vagrant", disabled: true

  config.vm.box = "technicalmachine/tessel2"

tcr

-- match regex /a*b/
print('/a*b/')

-- Lua wrapper to extract a character from a string
-- at the indexth position (starting from 0)
-- This is just a helper since Lua is 1-indexed which
-- is insane. You can just copy this out.
function charat (str, index)
	return string.sub(str, index + 1, index + 1)
end

tcr

Cool!