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Aaron Patterson tenderlove

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tenderlove / z-wave-uart.md
Created Feb 4, 2018
Aeotec Z-Wave Z-Stick Gen 5 UART protocol
View z-wave-uart.md

Z-Stick Serial API

The Z-Stick does bi-directional communication over a UART. The connection speed is 115200, '8N1'. There are "requests" and "responses". The client software can make requests to the Z-Stick, and it will send responses. But it seems the Z-Stick can make requests of the client software too. I have yet to figure out the requests the Z-Stick sends to the client software.

Packets

@tenderlove
tenderlove / h2_puma.rb
Last active Jun 24, 2021
Demo HTTP/2 server with Puma
View h2_puma.rb
require 'socket'
require 'openssl'
require 'puma/server'
require 'ds9'
class Server < DS9::Server
def initialize socket, app
@app = app
@read_streams = {}
@write_streams = {}
View fiddle_hacks.rb
# Fiddle, passing a pointer to an int. This gets the current process command
module Hacks
include Fiddle
func = "_NSGetExecutablePath"
path_ptr = Fiddle::Handle::DEFAULT[func]
path = Function.new path_ptr, [TYPE_VOIDP, TYPE_INTPTR_T], TYPE_INT, name: func
define_singleton_method(func, &path.to_proc)
@tenderlove
tenderlove / ruby_jit.rb
Last active Jun 16, 2021
Use fisk and fiddle to patch a Ruby method at runtime
View ruby_jit.rb
require "fisk"
require "fisk/helpers"
require "fiddle/import"
module Ruby
extend Fiddle::Importer
dlload
typealias "VALUE", "uintptr_t"
View heapviz.rb
require 'fiddle'
color_iter = DATA.readlines.map(&:chomp).map { |i|
i = i.to_i(16)
[(i >> 16) & 0xFF, (i >> 8) & 0xFF, i & 0xFF, 255]
}.each
SIZEOF_HEAP_PAGE_HEADER_STRUCT = Fiddle::SIZEOF_VOIDP
SIZEOF_RVALUE = 40
View heapviz.rb
require 'fiddle'
color_iter = DATA.readlines.map(&:chomp).map { |i|
i = i.to_i(16)
[(i >> 16) & 0xFF, (i >> 8) & 0xFF, i & 0xFF, 255]
}.each
SIZEOF_HEAP_PAGE_HEADER_STRUCT = Fiddle::SIZEOF_VOIDP
SIZEOF_RVALUE = 40
@tenderlove
tenderlove / a_query.rb
Created Apr 12, 2011
An example using lolquery
View a_query.rb
###
# lolquery is an fresh new take on SQL DSLs. NEVER WRITE SQL AGAIN! Using
# amazing lolquery technology, you too will never have to write another SQL
# statement again!
#
# Check out this simple example of using lolquery. Bask in it's simplicity,
# it's expressiveness, but most importantly, it's lack of writing SQL!
#
# <3 <3 <3 <3 <3
View break_dance.rb
# Have you ever wanted lldb to break in a certain place, but you weren't
# sure where to set the breakpoint? Look no further than this script!
#
# This script creates a chunk of executable code that uses the int3 x86
# instruction. This instruction is defined for use by debuggers, and you can
# read more about it here: https://en.wikipedia.org/wiki/INT_%28x86_instruction%29#INT3
#
# When that instruction is executed, the debugger will halt and you can do
# what you need!
#
View webrickhttp2.rb
require 'webrick'
require 'webrick/https'
require 'ds9'
class HTTP2Server < WEBrick::HTTPServer
SETTINGS = [ [DS9::Settings::MAX_CONCURRENT_STREAMS, 100] ]
class HTTP2Response < WEBrick::HTTPResponse
def initialize config, ctx, stream_id
@ctx = ctx
View thing.rb
require "objspace"
require "json"
def go x
count = GC.stat(:major_gc_count)
loop do
info = JSON.parse(ObjectSpace.dump(x))
break if info["flags"]["old"]
GC.start
end