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# frozen_string_literal: false
=begin
= Win32 DNS and DHCP I/F
=end
require 'win32/registry'
module Win32
module Resolv
API = Registry::API
Error = Registry::Error
def self.get_hosts_path
path = get_hosts_dir
path = File.expand_path('hosts', path)
File.exist?(path) ? path : nil
end
def self.get_resolv_info
search, nameserver = get_info
if search.empty?
search = nil
else
search.delete("")
search.uniq!
end
if nameserver.empty?
nameserver = nil
else
nameserver.delete("")
nameserver.delete("0.0.0.0")
nameserver.uniq!
end
[ search, nameserver ]
end
end
end
begin
require 'win32/resolv.so'
rescue LoadError
end
nt = Module.new do
break true if [nil].pack("p").size > 4
extend Importer
dlload "kernel32.dll"
getv = extern "int GetVersionExA(void *)", :stdcall
info = [ 148, 0, 0, 0, 0 ].pack('V5') + "\0" * 128
getv.call(info)
break info.unpack('V5')[4] == 2 # VER_PLATFORM_WIN32_NT
end
if not nt
require_relative 'resolv9x'
# return # does not work yet
else
module Win32
#====================================================================
# Windows NT
#====================================================================
module Resolv
module SZ
refine Registry do
# ad hoc workaround for broken registry
def read_s(key)
type, str = read(key)
unless type == Registry::REG_SZ
warn "Broken registry, #{name}\\#{key} was #{Registry.type2name(type)}, ignored"
return String.new
end
str
end
end
end
using SZ
TCPIP_NT = 'SYSTEM\CurrentControlSet\Services\Tcpip\Parameters'
class << self
private
def get_hosts_dir
Registry::HKEY_LOCAL_MACHINE.open(TCPIP_NT) do |reg|
reg.read_s_expand('DataBasePath')
end
end
def get_info
search = nil
nameserver = get_dns_server_list
Registry::HKEY_LOCAL_MACHINE.open(TCPIP_NT) do |reg|
begin
slist = reg.read_s('SearchList')
search = slist.split(/,\s*/) unless slist.empty?
rescue Registry::Error
end
if add_search = search.nil?
search = []
begin
nvdom = reg.read_s('NV Domain')
unless nvdom.empty?
@search = [ nvdom ]
if reg.read_i('UseDomainNameDevolution') != 0
if /^\w+\./ =~ nvdom
devo = $'
end
end
end
rescue Registry::Error
end
end
reg.open('Interfaces') do |h|
h.each_key do |iface, |
h.open(iface) do |regif|
next unless ns = %w[NameServer DhcpNameServer].find do |key|
begin
ns = regif.read_s(key)
rescue Registry::Error
else
break ns.split(/[,\s]\s*/) unless ns.empty?
end
end
next if (nameserver & ns).empty?
if add_search
begin
[ 'Domain', 'DhcpDomain' ].each do |key|
dom = regif.read_s(key)
unless dom.empty?
search.concat(dom.split(/,\s*/))
break
end
end
rescue Registry::Error
end
end
end
end
end
search << devo if add_search and devo
end
[ search.uniq, nameserver.uniq ]
end
end
end
end
end
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