From fcbf63e62c627deae76c1b8cb8c0876c536ed811 Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <jari.vetoniemi@indooratlas.com>
Date: Mon, 16 Mar 2020 18:49:26 +0900
Subject: Fresh start

---
 jni/ruby/lib/resolv-replace.rb | 74 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 jni/ruby/lib/resolv-replace.rb

(limited to 'jni/ruby/lib/resolv-replace.rb')

diff --git a/jni/ruby/lib/resolv-replace.rb b/jni/ruby/lib/resolv-replace.rb
new file mode 100644
index 0000000..3e28a84
--- /dev/null
+++ b/jni/ruby/lib/resolv-replace.rb
@@ -0,0 +1,74 @@
+require 'socket'
+require 'resolv'
+
+class << IPSocket
+  # :stopdoc:
+  alias original_resolv_getaddress getaddress
+  # :startdoc:
+  def getaddress(host)
+    begin
+      return Resolv.getaddress(host).to_s
+    rescue Resolv::ResolvError
+      raise SocketError, "Hostname not known: #{host}"
+    end
+  end
+end
+
+class TCPSocket < IPSocket
+  # :stopdoc:
+  alias original_resolv_initialize initialize
+  # :startdoc:
+  def initialize(host, serv, *rest)
+    rest[0] = IPSocket.getaddress(rest[0]) if rest[0]
+    original_resolv_initialize(IPSocket.getaddress(host), serv, *rest)
+  end
+end
+
+class UDPSocket < IPSocket
+  # :stopdoc:
+  alias original_resolv_bind bind
+  # :startdoc:
+  def bind(host, port)
+    host = IPSocket.getaddress(host) if host != ""
+    original_resolv_bind(host, port)
+  end
+
+  # :stopdoc:
+  alias original_resolv_connect connect
+  # :startdoc:
+  def connect(host, port)
+    original_resolv_connect(IPSocket.getaddress(host), port)
+  end
+
+  # :stopdoc:
+  alias original_resolv_send send
+  # :startdoc:
+  def send(mesg, flags, *rest)
+    if rest.length == 2
+      host, port = rest
+      begin
+        addrs = Resolv.getaddresses(host)
+      rescue Resolv::ResolvError
+        raise SocketError, "Hostname not known: #{host}"
+      end
+      addrs[0...-1].each {|addr|
+        begin
+          return original_resolv_send(mesg, flags, addr, port)
+        rescue SystemCallError
+        end
+      }
+      original_resolv_send(mesg, flags, addrs[-1], port)
+    else
+      original_resolv_send(mesg, flags, *rest)
+    end
+  end
+end
+
+class SOCKSSocket < TCPSocket
+  # :stopdoc:
+  alias original_resolv_initialize initialize
+  # :startdoc:
+  def initialize(host, serv)
+    original_resolv_initialize(IPSocket.getaddress(host), port)
+  end
+end if defined? SOCKSSocket
-- 
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