* lib/net/ftp.rb (makeport): close the TCPServer

  when sending the port fails.
* test/net/ftp/test_ftp.rb: test for above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51046 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,10 @@
+Sun Jun 14 19:02:03 2015  Benoit Daloze  <eregontp@gmail.com>
+
+	* lib/net/ftp.rb (makeport): close the TCPServer
+	  when sending the port fails.
+
+	* test/net/ftp/test_ftp.rb: test for above.
+
 Fri Jun 26 12:48:37 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* transcode.c (load_transcoder_entry): fix transcoder loading race

lib/net/ftp.rb

@@ -377,15 +377,9 @@ def sendport(host, port) # :nodoc:
     end
     private :sendport
 
-    # Constructs a TCPServer socket, and sends it the PORT command
-    #
-    # Returns the constructed TCPServer socket
+    # Constructs a TCPServer socket
     def makeport # :nodoc:
-      sock = TCPServer.open(@sock.addr[3], 0)
-      port = sock.addr[1]
-      host = sock.addr[3]
-      sendport(host, port)
-      return sock
+      TCPServer.open(@sock.addr[3], 0)
     end
     private :makeport
 
@@ -421,6 +415,7 @@ def transfercmd(cmd, rest_offset = nil) # :nodoc:
       else
         sock = makeport
         begin
+          sendport(sock.addr[3], sock.addr[1])
           if @resume and rest_offset
             resp = sendcmd("REST " + rest_offset.to_s)
             if resp[0] != ?3

test/net/ftp/test_ftp.rb

@@ -469,6 +469,46 @@ def test_list_fail
     end
   end
 
+  def test_open_data_port_fail_no_leak
+    commands = []
+    server = create_ftp_server { |sock|
+      sock.print("220 (test_ftp).\r\n")
+      commands.push(sock.gets)
+      sock.print("331 Please specify the password.\r\n")
+      commands.push(sock.gets)
+      sock.print("230 Login successful.\r\n")
+      commands.push(sock.gets)
+      sock.print("200 Switching to Binary mode.\r\n")
+      commands.push(sock.gets)
+      sock.print("200 Switching to ASCII mode.\r\n")
+      line = sock.gets
+      commands.push(line)
+      sock.print("421 Service not available, closing control connection.\r\n")
+      commands.push(sock.gets)
+      sock.print("200 Switching to Binary mode.\r\n")
+    }
+    begin
+      begin
+        ftp = Net::FTP.new
+        ftp.read_timeout = 0.2
+        ftp.connect(SERVER_ADDR, server.port)
+        ftp.login
+        assert_match(/\AUSER /, commands.shift)
+        assert_match(/\APASS /, commands.shift)
+        assert_equal("TYPE I\r\n", commands.shift)
+        assert_raise(Net::FTPTempError){ ftp.list }
+        assert_equal("TYPE A\r\n", commands.shift)
+        assert_match(/\APORT /, commands.shift)
+        assert_equal("TYPE I\r\n", commands.shift)
+        assert_equal(nil, commands.shift)
+      ensure
+        ftp.close if ftp
+      end
+    ensure
+      server.close
+    end
+  end
+
   def test_retrbinary_read_timeout_exceeded
     commands = []
     binary_data = (0..0xff).map {|i| i.chr}.join * 4 * 3