vavrusa

$ kdig @9.9.9.9 akamai.com +subnet=111.111.111.0/24
;; ->>HEADER<<- opcode: QUERY; status: NOERROR; id: 9698
;; Flags: qr rd ra; QUERY: 1; ANSWER: 1; AUTHORITY: 0; ADDITIONAL: 1

;; EDNS PSEUDOSECTION:
;; Version: 0; flags: ; UDP size: 4096 B; ext-rcode: NOERROR
;; CLIENT-SUBNET: 73.231.144.0/20/0

;; QUESTION SECTION:
;; akamai.com.         		IN	A

vavrusa

#!/usr/bin/python
#
# Copyright 2016 Google Inc
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#

vavrusa

-- C definitions
local ffi = require('ffi')
local csym = ffi.C
ffi.cdef[[
/* DHCP header format */
struct __attribute__((packed)) dhcp_msg {
	/* Header */
	uint8_t op;
	uint8_t htype;
	uint8_t hlen;