ADDED   src/asyncdns.cr
Index: src/asyncdns.cr
==================================================================
--- /dev/null
+++ src/asyncdns.cr
@@ -0,0 +1,7 @@
+require "./query"
+require "./resolver"
+
+# AsyncDNS is an asynchronous DNS resolver.
+module AsyncDNS
+  VERSION = "0.1.0"
+end

ADDED   src/dns_class.cr
Index: src/dns_class.cr
==================================================================
--- /dev/null
+++ src/dns_class.cr
@@ -0,0 +1,6 @@
+module AsyncDNS
+  enum DNSClass
+    IN  =   1
+    ANY = 255
+  end
+end

ADDED   src/query.cr
Index: src/query.cr
==================================================================
--- /dev/null
+++ src/query.cr
@@ -0,0 +1,12 @@
+require "./dns_class"
+require "./rr_type"
+
+module AsyncDNS
+  class Query
+    getter :domain_name, :dns_class, :rr_type
+
+    def initialize(@domain_name : String, @dns_class : DNSClass,
+                   @rr_type : RRType)
+    end
+  end
+end

ADDED   src/resolver.cr
Index: src/resolver.cr
==================================================================
--- /dev/null
+++ src/resolver.cr
@@ -0,0 +1,12 @@
+require "./settings"
+
+module AsyncDNS
+  class Resolver
+    getter :settings
+    setter :settings
+
+    def initialize
+      @settings = Settings.new
+    end
+  end
+end

ADDED   src/rr_type.cr
Index: src/rr_type.cr
==================================================================
--- /dev/null
+++ src/rr_type.cr
@@ -0,0 +1,16 @@
+module AsyncDNS
+  enum RRType
+    A     =   1
+    NS    =   2
+    CNAME =   5
+    SOA   =   6
+    PTR   =  12
+    HINFO =  13
+    MX    =  15
+    TXT   =  16
+    RP    =  17
+    AAAA  =  28
+    SRV   =  33
+    ALL   = 255
+  end
+end

ADDED   src/settings.cr
Index: src/settings.cr
==================================================================
--- /dev/null
+++ src/settings.cr
@@ -0,0 +1,57 @@
+require "time"
+
+module AsyncDNS
+  class Settings
+    @local_domain : String?
+    @last_reload : Time?
+
+    getter :static_hosts, :name_servers, :local_domain, :search_domains,
+      :timeout, :max_attempts, :abs_num_dots, :uses_tcp
+    setter :static_hosts, :name_servers, :local_domain, :search_domains,
+      :uses_tcp
+
+    def initialize
+      @static_hosts = Hash(String, Array(String)).new
+      @name_servers = [] of String
+      @search_domains = [] of String
+      @timeout = Time::Span.new(seconds: 2)
+      @max_attempts = 2
+      @abs_num_dots = 1
+      @uses_tcp = false
+
+      self.reload
+    end
+
+    def reload
+      {% if flag?(:unix) %}
+      self.parse_hosts "/etc/hosts"
+      {% else %}
+      {% raise "Your OS is not supported by AsyncDNS" %}
+      {% end %}
+    end
+
+    def parse_hosts(path)
+      file = File.open(path, "r")
+
+      @static_hosts.clear
+      file.each_line do |line|
+        pos = line.index('#')
+        line = line[0, pos] if pos
+
+        split = line.split(/[ \t]/, remove_empty: true)
+        next unless split.size >= 2
+
+        address = split[0]
+        split[1, split.size - 1].each do |host|
+          addresses = @static_hosts[host]?
+          if addresses.nil?
+            addresses = [] of String
+            @static_hosts[host] = addresses
+          end
+
+          addresses << address
+        end
+      end
+    end
+  end
+end

ADDED   tests/example.cr
Index: tests/example.cr
==================================================================
--- /dev/null
+++ tests/example.cr
@@ -0,0 +1,7 @@
+require "../src/asyncdns"
+
+AsyncDNS::Query.new("crystal-lang.org", AsyncDNS::DNSClass::IN,
+  AsyncDNS::RRType::A)
+
+settings = AsyncDNS::Settings.new
+p settings.static_hosts