ftp.rb: use Addrinfo interfaces

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56799 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/net/ftp.rb

@@ -431,7 +431,8 @@ module Net
       else
         sock = makeport
         begin
-          sendport(sock.addr[3], sock.addr[1])
+          addr = sock.local_address
+          sendport(addr.ip_address, addr.ip_port)
           if @resume and rest_offset
             resp = sendcmd("REST " + rest_offset.to_s)
             if !resp.start_with?("3")
@@ -1246,7 +1247,7 @@ module Net
         raise FTPReplyError, resp
       end
       if m = /\((?<d>[!-~])\k<d>\k<d>(?<port>\d+)\k<d>\)/.match(resp)
-        return @sock.peeraddr[3], m["port"].to_i
+        return @sock.remote_address.ip_address, m["port"].to_i
       else
         raise FTPProtoError, resp
       end

test/net/ftp/test_ftp.rb

@@ -109,7 +109,8 @@ class FTPTest < Test::Unit::TestCase
   def test_parse229
     ftp = Net::FTP.new
     sock = OpenStruct.new
-    sock.peeraddr = [nil, nil, nil, "1080:0000:0000:0000:0008:0800:200c:417a"]
+    sock.remote_address = OpenStruct.new
+    sock.remote_address.ip_address = "1080:0000:0000:0000:0008:0800:200c:417a"
     ftp.instance_variable_set(:@sock, sock)
     host, port = ftp.send(:parse229, "229 Entering Passive Mode (|||3106|)")
     assert_equal("1080:0000:0000:0000:0008:0800:200c:417a", host)