Merge pull request #316 from icylogic/release/2.5.7

Release/2.5.7
bump 2.5.7
2015-09-19 16:24:24 +08:00 · 2015-09-19 16:16:05 +08:00 · 2015-09-19 16:15:45 +08:00 · 2015-09-19 15:53:01 +08:00 · 2015-09-19 15:49:19 +08:00 · 2015-09-04 18:58:40 +08:00
47 changed files with 1797 additions and 248 deletions
@@ -1,4 +1,32 @@
-2.5 2015-07-11
+2.5.7 2015-09-19
+- Fix repeated IV.
+
+2.5.6 2015-08-19
+- Add portable mode. Create shadowsocks_portable_mode.txt to use it
+- Support server reorder
+
+2.5.5 2015-08-17
+- Fix crash when enabling Availability Statistics and some servers can not be resolved
+- Allow multiple instances
+- Other fixes
+
+2.5.4 2015-08-16
+- Hide Privoxy icon
+
+2.5.3 2015-08-16
+- Replace Polipo with Privoxy
+- Add Choose by Total Packet Loss
+
+2.5.2 2015-08-04
+- Add log viewer
+
+2.5.1 2015-07-26
+- Prevent HA from switching servers too frequently
+- Fix server settings can not be updated when using HA
+- Fix server port can't be 8123
+- Other minor fixes
+
+2.5 2015-07-25
 - Support load balance
 - Support high availability

@@ -20,30 +20,348 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 3rd party projects
 ==================

-polipo
+Privoxy
 ------------------

-https://github.com/jech/polipo
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991

-Copyright (c) 2003-2008 by Juliusz Chroboczek
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.

-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
+                            Preamble

-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.

-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.


 PolarSSL
@@ -98,7 +416,6 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.

-
 libsodium
 ---------

@@ -3,56 +3,81 @@ Shadowsocks for Windows

 [![Build Status]][Appveyor]

+[中文说明]
+
 #### Features

 1. System proxy configuration
 2. PAC mode and global mode
-3. GFWList and user rules
+3. [GFWList] and user rules
 4. Supports HTTP proxy
 5. Supports server auto switching
 6. Supports UDP relay (see Usage)

 #### Download

-Download a [latest release].
-
-For >= Windows 8 or with .Net 4.0, download Shadowsocks-win-dotnet4.0-x.x.x.zip.
-
-For <= Windows 7 or with .Net 2.0, download Shadowsocks-win-x.x.x.zip.
+Download the [latest release].

 #### Basic

 1. Find Shadowsocks icon in the notification tray
 2. You can add multiple servers in servers menu
-3. Select Enable System Proxy menu to enable system proxy. Please disable other
+3. Select `Enable System Proxy` menu to enable system proxy. Please disable other
 proxy addons in your browser, or set them to use system proxy
 4. You can also configure your browser proxy manually if you don't want to enable
 system proxy. Set Socks5 or HTTP proxy to 127.0.0.1:1080. You can change this
-port in Server -> Edit Servers
+port in `Servers -> Edit Servers`

 #### PAC

 1. You can change PAC rules by editing the PAC file. When you save the PAC file
 with any editor, Shadowsocks will notify browsers about the change automatically
-2. You can also update PAC file from GFWList (maintained by 3rd party)
+2. You can also update PAC file from [GFWList] (maintained by 3rd party)
 3. You can also use online PAC URL

 #### Server Auto Switching

 1. Load balance: choosing server randomly
 2. High availability: choosing the best server (low latency and packet loss)
-3. Write your own strategy by implement IStrategy interface and send us a pull request!
+3. Choose By Total Package Loss: ping and choose. Please also enable
+   `Availability Statistics` in the menu if you want to use this
+4. Write your own strategy by implement IStrategy interface and send us a pull request!

 #### UDP

 For UDP, you need to use SocksCap or ProxyCap to force programs you want
-to proxy to tunnel over Shadowsocks
+to be proxied to tunnel over Shadowsocks
+
+#### Multiple Instances
+
+If you want to manage multiple servers using other tools like SwitchyOmega,
+you can start multiple Shadowsocks instances. To avoid configuration conflicts,
+copy Shadowsocks to a new directory and choose a different local port.
+
+Also, make sure to use `SOCKS5` proxy in SwitchyOmega, since we have only
+one HTTP proxy instance.
+
+#### Server Configuration
+
+Please visit [Servers] for more information.
+
+#### Portable Mode
+
+If you want to put all temporary files into shadowsocks/temp folder instead of
+system temp folder, create a `shadowsocks_portable_mode.txt` into shadowsocks folder.
+
+#### Develop
+
+Visual Studio 2015 is required.

 #### License

 GPLv3


-[Appveyor]:       https://ci.appveyor.com/project/clowwindy/shadowsocks-csharp
-[Build Status]:   https://ci.appveyor.com/api/projects/status/gknc8l1lxy423ehv/branch/master
+[Appveyor]:       https://ci.appveyor.com/project/icylogic/shadowsocks-windows-l9mwe
+[Build Status]:   https://ci.appveyor.com/api/projects/status/ytllr9yjkbpc2tu2/branch/master
 [latest release]: https://github.com/shadowsocks/shadowsocks-csharp/releases
+[GFWList]:        https://github.com/gfwlist/gfwlist
+[Servers]:        https://github.com/shadowsocks/shadowsocks/wiki/Ports-and-Clients#linux--server-side
+[中文说明]:       https://github.com/shadowsocks/shadowsocks-windows/wiki/Shadowsocks-Windows-%E4%BD%BF%E7%94%A8%E8%AF%B4%E6%98%8E
@@ -12,7 +12,7 @@ namespace Shadowsocks.Controller
        static I18N()
        {
            Strings = new Dictionary<string, string>();
-            
+
            if (System.Globalization.CultureInfo.CurrentCulture.IetfLanguageTag.ToLowerInvariant().StartsWith("zh"))
            {
                string[] lines = Regex.Split(Resources.cn, "\r\n|\r|\n");
@@ -1,4 +1,5 @@
-using System;
+using Shadowsocks.Util;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Net.Sockets;
@@ -14,14 +15,14 @@ namespace Shadowsocks.Controller
        {
            try
            {
-                string temppath = Path.GetTempPath();
+                string temppath = Utils.GetTempPath();
                LogFile = Path.Combine(temppath, "shadowsocks.log");
                FileStream fs = new FileStream(LogFile, FileMode.Append);
                StreamWriterWithTimestamp sw = new StreamWriterWithTimestamp(fs);
                sw.AutoFlush = true;
                Console.SetOut(sw);
                Console.SetError(sw);
-                
+
                return true;
            }
            catch (IOException e)
@@ -71,7 +72,6 @@ namespace Shadowsocks.Controller
                Console.WriteLine(e);
            }
        }
-
    }

    // Simply extended System.IO.StreamWriter for adding timestamp workaround
@@ -0,0 +1,118 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net.NetworkInformation;
+using System.Threading;
+using Shadowsocks.Model;
+using System.Reflection;
+using Shadowsocks.Util;
+
+namespace Shadowsocks.Controller
+{
+    class AvailabilityStatistics
+    {
+        private static readonly string StatisticsFilesName = "shadowsocks.availability.csv";
+        private static readonly string Delimiter = ",";
+        private static readonly int Timeout = 500;
+        private static readonly int Repeat = 4; //repeat times every evaluation
+        private static readonly int Interval = 10 * 60 * 1000;  //evaluate proxies every 15 minutes
+        private Timer timer = null;
+        private State state = null;
+        private List<Server> servers;
+
+        public static string AvailabilityStatisticsFile;
+
+        //static constructor to initialize every public static fields before refereced
+        static AvailabilityStatistics()
+        {
+            string temppath = Utils.GetTempPath();
+            AvailabilityStatisticsFile = Path.Combine(temppath, StatisticsFilesName);
+        }
+
+        public bool Set(bool enabled)
+        {
+            try
+            {
+                if (enabled)
+                {
+                    if (timer?.Change(0, Interval) == null)
+                    {
+                        state = new State();
+                        timer = new Timer(Evaluate, state, 0, Interval);
+                    }
+                }
+                else
+                {
+                    timer?.Dispose();
+                }
+                return true;
+            }
+            catch (Exception e)
+            {
+                Logging.LogUsefulException(e);
+                return false;
+            }
+        }
+
+        private void Evaluate(object obj)
+        {
+            Ping ping = new Ping();
+            State state = (State) obj;
+            foreach (var server in servers)
+            {
+                Logging.Debug("eveluating " + server.FriendlyName());
+                foreach (var _ in Enumerable.Range(0, Repeat))
+                {
+                    //TODO: do simple analyze of data to provide friendly message, like package loss.
+                    string timestamp = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
+                    //ICMP echo. we can also set options and special bytes
+                    //seems no need to use SendPingAsync
+                    try
+                    {
+                        PingReply reply = ping.Send(server.server, Timeout);
+                        state.data = new List<KeyValuePair<string, string>>();
+                        state.data.Add(new KeyValuePair<string, string>("Timestamp", timestamp));
+                        state.data.Add(new KeyValuePair<string, string>("Server", server.FriendlyName()));
+                        state.data.Add(new KeyValuePair<string, string>("Status", reply.Status.ToString()));
+                        state.data.Add(new KeyValuePair<string, string>("RoundtripTime", reply.RoundtripTime.ToString()));
+                        //state.data.Add(new KeyValuePair<string, string>("data", reply.Buffer.ToString())); // The data of reply
+                        Append(state.data);
+                    }
+                    catch (Exception e)
+                    {
+                        Console.WriteLine($"An exception occured when eveluating {server.FriendlyName()}");
+                        Logging.LogUsefulException(e);
+                    }
+                }
+            }
+        }
+
+        private static void Append(List<KeyValuePair<string, string>> data)
+        {
+            string dataLine = string.Join(Delimiter, data.Select(kv => kv.Value).ToArray());
+            string[] lines;
+            if (!File.Exists(AvailabilityStatisticsFile))
+            {
+                string headerLine = string.Join(Delimiter, data.Select(kv => kv.Key).ToArray());
+                lines = new string[] { headerLine, dataLine };
+            }
+            else
+            {
+                lines = new string[] { dataLine };
+            }
+            File.AppendAllLines(AvailabilityStatisticsFile, lines);
+        }
+
+        internal void UpdateConfiguration(Configuration _config)
+        {
+            Set(_config.availabilityStatistics);
+            servers = _config.configs;
+        }
+
+        private class State
+        {
+            public List<KeyValuePair<string, string>> data = new List<KeyValuePair<string, string>>();
+        }
+    }
+}
@@ -77,7 +77,6 @@ namespace Shadowsocks.Controller
                _udpSocket.Bind(localEndPoint);
                _tcpSocket.Listen(1024);

-
                // Start an asynchronous socket to listen for connections.
                Console.WriteLine("Shadowsocks started");
                _tcpSocket.BeginAccept(
@@ -185,7 +184,6 @@ namespace Shadowsocks.Controller
            }
        }

-
        private void ReceiveCallback(IAsyncResult ar)
        {
            object[] state = (object[])ar.AsyncState;
@@ -86,7 +86,6 @@ namespace Shadowsocks.Controller
            }
        }

-
        public string TouchPACFile()
        {
            if (File.Exists(PAC_FILE))
@@ -146,7 +145,7 @@ Connection: Close
 ", System.Text.Encoding.UTF8.GetBytes(pac).Length) + pac;
                byte[] response = System.Text.Encoding.UTF8.GetBytes(text);
                socket.BeginSend(response, 0, response.Length, 0, new AsyncCallback(SendCallback), socket);
-                Util.Utils.ReleaseMemory();
+                Util.Utils.ReleaseMemory(true);
            }
            catch (Exception e)
            {
@@ -8,6 +8,8 @@ using System.IO.Compression;
 using System.Text;
 using System.Net.NetworkInformation;
 using System.Net;
+using System.Runtime.InteropServices;
+using Shadowsocks.Util;

 namespace Shadowsocks.Controller
 {
@@ -19,10 +21,11 @@ namespace Shadowsocks.Controller

        static PolipoRunner()
        {
-            temppath = Path.GetTempPath();
+            temppath = Utils.GetTempPath();
            try
            {
-                FileManager.UncompressFile(temppath + "/ss_polipo.exe", Resources.polipo_exe);
+                FileManager.UncompressFile(temppath + "/ss_privoxy.exe", Resources.privoxy_exe);
+                FileManager.UncompressFile(temppath + "/mgwz.dll", Resources.mgwz_dll);
            }
            catch (IOException e)
            {
@@ -43,7 +46,7 @@ namespace Shadowsocks.Controller
            Server server = configuration.GetCurrentServer();
            if (_process == null)
            {
-                Process[] existingPolipo = Process.GetProcessesByName("ss_polipo");
+                Process[] existingPolipo = Process.GetProcessesByName("ss_privoxy");
                foreach (Process p in existingPolipo)
                {
                    try
@@ -56,17 +59,20 @@ namespace Shadowsocks.Controller
                        Console.WriteLine(e.ToString());
                    }
                }
-                string polipoConfig = Resources.polipo_config;
+                string polipoConfig = Resources.privoxy_conf;
                _runningPort = this.GetFreePort();
                polipoConfig = polipoConfig.Replace("__SOCKS_PORT__", configuration.localPort.ToString());
                polipoConfig = polipoConfig.Replace("__POLIPO_BIND_PORT__", _runningPort.ToString());
                polipoConfig = polipoConfig.Replace("__POLIPO_BIND_IP__", configuration.shareOverLan ? "0.0.0.0" : "127.0.0.1");
-                FileManager.ByteArrayToFile(temppath + "/polipo.conf", System.Text.Encoding.UTF8.GetBytes(polipoConfig));
+                FileManager.ByteArrayToFile(temppath + "/privoxy.conf", System.Text.Encoding.UTF8.GetBytes(polipoConfig));

+                if (!(temppath.EndsWith("\\") || temppath.EndsWith("/"))) {
+                    temppath = temppath + "\\";
+                }
                _process = new Process();
                // Configure the process using the StartInfo properties.
-                _process.StartInfo.FileName = temppath + "/ss_polipo.exe";
-                _process.StartInfo.Arguments = "-c \"" + temppath + "/polipo.conf\"";
+                _process.StartInfo.FileName = temppath + "ss_privoxy.exe";
+                _process.StartInfo.Arguments = " \"" + temppath + "privoxy.conf\"";
                _process.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
                _process.StartInfo.UseShellExecute = true;
                _process.StartInfo.CreateNoWindow = true;
@@ -74,6 +80,7 @@ namespace Shadowsocks.Controller
                //_process.StartInfo.RedirectStandardError = true;
                _process.Start();
            }
+            RefreshTrayArea();
        }

        public void Stop()
@@ -91,6 +98,7 @@ namespace Shadowsocks.Controller
                }
                _process = null;
            }
+            RefreshTrayArea();
        }

        private int GetFreePort()
@@ -122,5 +130,48 @@ namespace Shadowsocks.Controller
            }
            throw new Exception("No free port found.");
        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        public struct RECT
+        {
+            public int left;
+            public int top;
+            public int right;
+            public int bottom;
+        }
+        [DllImport("user32.dll")]
+        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
+        [DllImport("user32.dll")]
+        public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);
+        [DllImport("user32.dll")]
+        public static extern bool GetClientRect(IntPtr hWnd, out RECT lpRect);
+        [DllImport("user32.dll")]
+        public static extern IntPtr SendMessage(IntPtr hWnd, uint msg, int wParam, int lParam);
+
+        public void RefreshTrayArea()
+        {
+            IntPtr systemTrayContainerHandle = FindWindow("Shell_TrayWnd", null);
+            IntPtr systemTrayHandle = FindWindowEx(systemTrayContainerHandle, IntPtr.Zero, "TrayNotifyWnd", null);
+            IntPtr sysPagerHandle = FindWindowEx(systemTrayHandle, IntPtr.Zero, "SysPager", null);
+            IntPtr notificationAreaHandle = FindWindowEx(sysPagerHandle, IntPtr.Zero, "ToolbarWindow32", "Notification Area");
+            if (notificationAreaHandle == IntPtr.Zero)
+            {
+                notificationAreaHandle = FindWindowEx(sysPagerHandle, IntPtr.Zero, "ToolbarWindow32", "User Promoted Notification Area");
+                IntPtr notifyIconOverflowWindowHandle = FindWindow("NotifyIconOverflowWindow", null);
+                IntPtr overflowNotificationAreaHandle = FindWindowEx(notifyIconOverflowWindowHandle, IntPtr.Zero, "ToolbarWindow32", "Overflow Notification Area");
+                RefreshTrayArea(overflowNotificationAreaHandle);
+            }
+            RefreshTrayArea(notificationAreaHandle);
+        }
+
+        private static void RefreshTrayArea(IntPtr windowHandle)
+        {
+            const uint wmMousemove = 0x0200;
+            RECT rect;
+            GetClientRect(windowHandle, out rect);
+            for (var x = 0; x < rect.right; x += 5)
+                for (var y = 0; y < rect.bottom; y += 5)
+                    SendMessage(windowHandle, wmMousemove, 0, (y << 16) + x);
+        }
    }
 }
@@ -103,7 +103,6 @@ namespace Shadowsocks.Controller
                }
            }

-
            private void StartPipe(IAsyncResult ar)
            {
                if (_closed)
@@ -14,9 +14,18 @@ namespace Shadowsocks.Controller
    class TCPRelay : Listener.Service
    {
        private ShadowsocksController _controller;
+        private DateTime _lastSweepTime;
+
+        public ISet<Handler> Handlers
+        {
+            get; set;
+        }
+
        public TCPRelay(ShadowsocksController controller)
        {
            this._controller = controller;
+            this.Handlers = new HashSet<Handler>();
+            this._lastSweepTime = DateTime.Now;
        }

        public bool Handle(byte[] firstPacket, int length, Socket socket, object state)
@@ -33,9 +42,33 @@ namespace Shadowsocks.Controller
            Handler handler = new Handler();
            handler.connection = socket;
            handler.controller = _controller;
+            handler.relay = this;

            handler.Start(firstPacket, length);
-            return true;
+            IList<Handler> handlersToClose = new List<Handler>();
+            lock (this.Handlers)
+            {
+                this.Handlers.Add(handler);
+                Logging.Debug($"connections: {Handlers.Count}");
+                DateTime now = DateTime.Now;
+                if (now - _lastSweepTime > TimeSpan.FromSeconds(1))
+                {
+                    _lastSweepTime = now;
+                    foreach (Handler handler1 in this.Handlers)
+                    {
+                        if (now - handler1.lastActivity > TimeSpan.FromSeconds(900))
+                        {
+                            handlersToClose.Add(handler1);
+                        }
+                    }
+                }
+            }
+            foreach (Handler handler1 in handlersToClose)
+            {
+                Logging.Debug("Closing timed out connection");
+                handler1.Close();
+            }
+        return true;
        }
    }

@@ -48,6 +81,10 @@ namespace Shadowsocks.Controller
        public Socket remote;
        public Socket connection;
        public ShadowsocksController controller;
+        public TCPRelay relay;
+
+        public DateTime lastActivity;
+
        private int retryCount = 0;
        private bool connected;

@@ -55,7 +92,7 @@ namespace Shadowsocks.Controller
        private byte[] _firstPacket;
        private int _firstPacketLength;
        // Size of receive buffer.
-        public const int RecvSize = 16384;
+        public const int RecvSize = 8192;
        public const int BufferSize = RecvSize + 32;

        private int totalRead = 0;
@@ -74,7 +111,7 @@ namespace Shadowsocks.Controller
        private bool connectionShutdown = false;
        private bool remoteShutdown = false;
        private bool closed = false;
-        
+
        private object encryptionLock = new object();
        private object decryptionLock = new object();

@@ -83,6 +120,10 @@ namespace Shadowsocks.Controller
        public void CreateRemote()
        {
            Server server = controller.GetAServer(IStrategyCallerType.TCP, (IPEndPoint)connection.RemoteEndPoint);
+            if (server == null || server.server == "")
+            {
+                throw new ArgumentException("No server configured");
+            }
            this.encryptor = EncryptorFactory.GetEncryptor(server.method, server.password);
            this.server = server;
        }
@@ -92,6 +133,7 @@ namespace Shadowsocks.Controller
            this._firstPacket = firstPacket;
            this._firstPacketLength = length;
            this.HandshakeReceive();
+            this.lastActivity = DateTime.Now;
        }

        private void CheckClose()
@@ -104,6 +146,11 @@ namespace Shadowsocks.Controller

        public void Close()
        {
+            lock (relay.Handlers)
+            {
+                Logging.Debug($"connections: {relay.Handlers.Count}");
+                relay.Handlers.Remove(this);
+            }
            lock (this)
            {
                if (closed)
@@ -148,7 +195,6 @@ namespace Shadowsocks.Controller
            }
        }

-
        private void HandshakeReceive()
        {
            if (closed)
@@ -218,7 +264,7 @@ namespace Shadowsocks.Controller
            try
            {
                int bytesRead = connection.EndReceive(ar);
-                
+
                if (bytesRead >= 3)
                {
                    command = connetionRecvBuffer[1];
@@ -268,7 +314,6 @@ namespace Shadowsocks.Controller

        private void ReadAll(IAsyncResult ar)
        {
-
            if (closed)
            {
                return;
@@ -310,6 +355,7 @@ namespace Shadowsocks.Controller

                StartConnect();
            }
+
            catch (Exception e)
            {
                Logging.LogUsefulException(e);
@@ -342,7 +388,6 @@ namespace Shadowsocks.Controller
                }
                IPEndPoint remoteEP = new IPEndPoint(ipAddress, server.server_port);

-
                remote = new Socket(ipAddress.AddressFamily,
                    SocketType.Stream, ProtocolType.Tcp);
                remote.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.NoDelay, true);
@@ -429,7 +474,7 @@ namespace Shadowsocks.Controller

                StartPipe();
            }
-            catch (ArgumentException e)
+            catch (ArgumentException)
            {
            }
            catch (Exception e)
@@ -480,6 +525,7 @@ namespace Shadowsocks.Controller

                if (bytesRead > 0)
                {
+                    this.lastActivity = DateTime.Now;
                    int bytesToSend;
                    lock (decryptionLock)
                    {
@@ -543,7 +589,6 @@ namespace Shadowsocks.Controller
                    }
                    remote.BeginSend(connetionSendBuffer, 0, bytesToSend, 0, new AsyncCallback(PipeRemoteSendCallback), null);

-
                    IStrategy strategy = controller.GetCurrentStrategy();
                    if (strategy != null)
                    {
@@ -602,5 +647,4 @@ namespace Shadowsocks.Controller
            }
        }
    }
-
 }
@@ -108,9 +108,11 @@ namespace Shadowsocks.Controller
                }
                catch (ObjectDisposedException)
                {
+                    // TODO: handle the ObjectDisposedException
                }
                catch (Exception)
                {
+                    // TODO: need more think about handle other Exceptions, or should remove this catch().
                }
                finally
                {
@@ -124,9 +126,11 @@ namespace Shadowsocks.Controller
                }
                catch (ObjectDisposedException)
                {
+                    // TODO: handle the ObjectDisposedException
                }
                catch (Exception)
                {
+                    // TODO: need more think about handle other Exceptions, or should remove this catch().
                }
                finally
                {
@@ -134,6 +138,8 @@ namespace Shadowsocks.Controller
            }
        }
    }
+
+
    // cc by-sa 3.0 http://stackoverflow.com/a/3719378/1124054
    class LRUCache<K, V> where V : UDPRelay.UDPHandler
    {
@@ -196,5 +202,4 @@ namespace Shadowsocks.Controller
        public K key;
        public V value;
    }
-
 }
@@ -12,13 +12,13 @@ namespace Shadowsocks.Controller
 {
    public class UpdateChecker
    {
-        private const string UpdateURL = "https://api.github.com/repos/shadowsocks/shadowsocks-csharp/releases";
+        private const string UpdateURL = "https://api.github.com/repos/shadowsocks/shadowsocks-windows/releases";

        public string LatestVersionNumber;
        public string LatestVersionURL;
        public event EventHandler NewVersionFound;

-        public const string Version = "2.5";
+        public const string Version = "2.5.7";

        public void CheckUpdate(Configuration config)
        {
@@ -53,7 +53,6 @@ namespace Shadowsocks.Controller
            {
                return CompareVersion(ParseVersionFromURL(x), ParseVersionFromURL(y));
            }
-
        }

        private static string ParseVersionFromURL(string url)
@@ -80,30 +79,6 @@ namespace Shadowsocks.Controller
            {
                return false;
            }
-            // check dotnet 4.0
-            AssemblyName[] references = Assembly.GetExecutingAssembly().GetReferencedAssemblies();
-            Version dotNetVersion = Environment.Version;
-            foreach (AssemblyName reference in references)
-            {
-                if (reference.Name == "mscorlib")
-                {
-                    dotNetVersion = reference.Version;
-                }
-            }
-            if (dotNetVersion.Major >= 4)
-            {
-                if (url.IndexOf("dotnet4.0") < 0)
-                {
-                    return false;
-                }
-            }
-            else
-            {
-                if (url.IndexOf("dotnet4.0") >= 0)
-                {
-                    return false;
-                }
-            }
            string version = ParseVersionFromURL(url);
            if (version == null)
            {
@@ -154,7 +129,7 @@ namespace Shadowsocks.Controller
            }
            catch (Exception ex)
            {
-                Console.WriteLine(ex.ToString());
+                Logging.Debug(ex.ToString());
                return;
            }
        }
@@ -25,6 +25,7 @@ namespace Shadowsocks.Controller
        private StrategyManager _strategyManager;
        private PolipoRunner polipoRunner;
        private GFWListUpdater gfwListUpdater;
+        private AvailabilityStatistics _availabilityStatics;
        private bool stopped = false;

        private bool _systemProxyIsDirty = false;
@@ -38,7 +39,7 @@ namespace Shadowsocks.Controller
        public event EventHandler EnableStatusChanged;
        public event EventHandler EnableGlobalChanged;
        public event EventHandler ShareOverLANStatusChanged;
-        
+
        // when user clicked Edit PAC, and PAC file has already created
        public event EventHandler<PathEventArgs> PACFileReadyToOpen;
        public event EventHandler<PathEventArgs> UserRuleFileReadyToOpen;
@@ -53,6 +54,7 @@ namespace Shadowsocks.Controller
        {
            _config = Configuration.Load();
            _strategyManager = new StrategyManager(this);
+            StartReleasingMemory();
        }

        public void Start()
@@ -109,6 +111,10 @@ namespace Shadowsocks.Controller
            {
                return strategy.GetAServer(type, localIPEndPoint);
            }
+            if (_config.index < 0)
+            {
+                _config.index = 0;
+            }
            return GetCurrentServer();
        }

@@ -224,6 +230,11 @@ namespace Shadowsocks.Controller
        public string GetQRCodeForCurrentServer()
        {
            Server server = GetCurrentServer();
+            return GetQRCode(server);
+        }
+
+        public static string GetQRCode(Server server)
+        {
            string parts = server.method + ":" + server.password + "@" + server.server + ":" + server.server_port;
            string base64 = System.Convert.ToBase64String(Encoding.UTF8.GetBytes(parts));
            return "ss://" + base64;
@@ -237,6 +248,16 @@ namespace Shadowsocks.Controller
            }
        }

+        public void ToggleAvailabilityStatistics(bool enabled)
+        {
+            if (_availabilityStatics != null)
+            {
+                _availabilityStatics.Set(enabled);
+                _config.availabilityStatistics = enabled;
+                SaveConfig(_config);
+            }
+        }
+
        public void SavePACUrl(string pacUrl)
        {
            _config.pacUrl = pacUrl;
@@ -286,6 +307,12 @@ namespace Shadowsocks.Controller
                _listener.Stop();
            }

+            if (_availabilityStatics == null)
+            {
+                _availabilityStatics = new AvailabilityStatistics();
+                _availabilityStatics.UpdateConfiguration(_config);
+            }
+
            // don't put polipoRunner.Start() before pacServer.Stop()
            // or bind will fail when switching bind address from 0.0.0.0 to 127.0.0.1
            // though UseShellExecute is set to true now
@@ -293,7 +320,8 @@ namespace Shadowsocks.Controller
            polipoRunner.Stop();
            try
            {
-                foreach (var strategy in GetStrategies())
+                var strategy = GetCurrentStrategy();
+                if (strategy != null)
                {
                    strategy.ReloadServers();
                }
@@ -332,17 +360,15 @@ namespace Shadowsocks.Controller
            }

            UpdateSystemProxy();
-            Util.Utils.ReleaseMemory();
+            Util.Utils.ReleaseMemory(true);
        }

-
        protected void SaveConfig(Configuration newConfig)
        {
            Configuration.Save(newConfig);
            Reload();
        }

-
        private void UpdateSystemProxy()
        {
            if (_config.enabled)
@@ -389,7 +415,7 @@ namespace Shadowsocks.Controller
        {
            while (true)
            {
-                Util.Utils.ReleaseMemory();
+                Util.Utils.ReleaseMemory(false);
                Thread.Sleep(30 * 1000);
            }
        }
@@ -7,7 +7,7 @@ namespace Shadowsocks.Controller.Strategy
 {
    class HighAvailabilityStrategy : IStrategy
    {
-        protected Server _currentServer;
+        protected ServerStatus _currentServer;
        protected Dictionary<Server, ServerStatus> _serverStatus;
        ShadowsocksController _controller;
        Random _random;
@@ -67,6 +67,11 @@ namespace Shadowsocks.Controller.Strategy
                    status.lastTimeDetectLatency = DateTime.Now;
                    newServerStatus[server] = status;
                }
+                else
+                {
+                    // update settings for existing server
+                    newServerStatus[server].server = server;
+                }
            }
            _serverStatus = newServerStatus;

@@ -79,7 +84,11 @@ namespace Shadowsocks.Controller.Strategy
            {
                ChooseNewServer();
            }
-            return _currentServer;
+            if (_currentServer == null)
+            {
+                return null;
+            }
+            return _currentServer.server;
        }

        /**
@@ -90,7 +99,7 @@ namespace Shadowsocks.Controller.Strategy
         */
        public void ChooseNewServer()
        {
-            Server oldServer = _currentServer;
+            ServerStatus oldServer = _currentServer;
            List<ServerStatus> servers = new List<ServerStatus>(_serverStatus.Values);
            DateTime now = DateTime.Now;
            foreach (var status in servers)
@@ -120,12 +129,11 @@ namespace Shadowsocks.Controller.Strategy
            }
            if (max != null)
            {
-                _currentServer = max.server;
-                if (_currentServer != oldServer)
+                if (_currentServer == null || max.score - _currentServer.score > 200)
                {
-                    Console.WriteLine("HA switching to server: {0}", _currentServer.FriendlyName());
+                    _currentServer = max;
+                    Console.WriteLine("HA switching to server: {0}", _currentServer.server.FriendlyName());
                }
-                Logging.Debug(String.Format("choosing server: {0}", _currentServer.FriendlyName()));
            }
        }

@@ -14,17 +14,17 @@ namespace Shadowsocks.Controller.Strategy

    /*
     * IStrategy
-     * 
+     *
     * Subclasses must be thread-safe
     */
    public interface IStrategy
    {
        string Name { get; }
-        
+
        string ID { get; }

        /*
-         * Called when servers need to be reloaded, i.e. new configuration saved 
+         * Called when servers need to be reloaded, i.e. new configuration saved
         */
        void ReloadServers();

@@ -0,0 +1,176 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Text;
+using Shadowsocks.Model;
+using System.IO;
+using System.Net.NetworkInformation;
+using System.Threading;
+
+namespace Shadowsocks.Controller.Strategy
+{
+    class SimplyChooseByStatisticsStrategy : IStrategy
+    {
+        private ShadowsocksController _controller;
+        private Server _currentServer;
+        private Timer timer;
+        private Dictionary<string, StatisticsData> statistics;
+        private static readonly int CachedInterval = 30 * 60 * 1000; //choose a new server every 30 minutes
+
+        public SimplyChooseByStatisticsStrategy(ShadowsocksController controller)
+        {
+            _controller = controller;
+            var servers = controller.GetCurrentConfiguration().configs;
+            int randomIndex = new Random().Next() % servers.Count();
+            _currentServer = servers[randomIndex];  //choose a server randomly at first
+            timer = new Timer(ReloadStatisticsAndChooseAServer);
+        }
+
+        private void ReloadStatisticsAndChooseAServer(object obj)
+        {
+            Logging.Debug("Reloading statistics and choose a new server....");
+            List<Server> servers = _controller.GetCurrentConfiguration().configs;
+            LoadStatistics();
+            ChooseNewServer(servers);
+        }
+
+        /*
+        return a dict:
+        {
+            'ServerFriendlyName1':StatisticsData,
+            'ServerFriendlyName2':...
+        }
+        */
+        private void LoadStatistics()
+        {
+            try
+            {
+                var path = AvailabilityStatistics.AvailabilityStatisticsFile;
+                Logging.Debug(string.Format("loading statistics from{0}", path));
+                statistics = (from l in File.ReadAllLines(path)
+                                  .Skip(1)
+                                  let strings = l.Split(new[] { "," }, StringSplitOptions.RemoveEmptyEntries)
+                                  let rawData = new
+                                  {
+                                      ServerName = strings[1],
+                                      IPStatus = strings[2],
+                                      RoundtripTime = int.Parse(strings[3])
+                                  }
+                                  group rawData by rawData.ServerName into server
+                                  select new
+                                  {
+                                      ServerName = server.Key,
+                                      data = new StatisticsData
+                                      {
+                                          SuccessTimes = server.Count(data => IPStatus.Success.ToString().Equals(data.IPStatus)),
+                                          TimedOutTimes = server.Count(data => IPStatus.TimedOut.ToString().Equals(data.IPStatus)),
+                                          AverageResponse = Convert.ToInt32(server.Average(data => data.RoundtripTime)),
+                                          MinResponse = server.Min(data => data.RoundtripTime),
+                                          MaxResponse = server.Max(data => data.RoundtripTime)
+                                      }
+                                  }).ToDictionary(server => server.ServerName, server => server.data);
+            }
+            catch (Exception e)
+            {
+                Logging.LogUsefulException(e);
+            }
+        }
+
+        //return the score by data
+        //server with highest score will be choosen
+        private static double GetScore(StatisticsData data)
+        {
+            return (double)data.SuccessTimes / (data.SuccessTimes + data.TimedOutTimes); //simply choose min package loss
+        }
+
+        private class StatisticsData
+        {
+            public int SuccessTimes;
+            public int TimedOutTimes;
+            public int AverageResponse;
+            public int MinResponse;
+            public int MaxResponse;
+        }
+
+        private void ChooseNewServer(List<Server> servers)
+        {
+            if (statistics == null)
+            {
+                return;
+            }
+            try
+            {
+                var bestResult = (from server in servers
+                                  let name = server.FriendlyName()
+                                  where statistics.ContainsKey(name)
+                                  select new
+                                  {
+                                      server,
+                                      score = GetScore(statistics[name])
+                                  }
+                                  ).Aggregate((result1, result2) => result1.score > result2.score ? result1 : result2);
+
+                if (_controller.GetCurrentStrategy().ID == ID && _currentServer != bestResult.server) //output when enabled
+                {
+                    Console.WriteLine("Switch to server: {0} by package loss:{1}", bestResult.server.FriendlyName(), 1 - bestResult.score);
+                }
+                _currentServer = bestResult.server;
+            }
+            catch (Exception e)
+            {
+                Logging.LogUsefulException(e);
+            }
+        }
+
+        public string ID
+        {
+            get { return "com.shadowsocks.strategy.scbs"; }
+        }
+
+        public string Name
+        {
+            get { return I18N.GetString("Choose By Total Package Loss"); }
+        }
+
+        public Server GetAServer(IStrategyCallerType type, IPEndPoint localIPEndPoint)
+        {
+            var oldServer = _currentServer;
+            if (oldServer == null)
+            {
+                ChooseNewServer(_controller.GetCurrentConfiguration().configs);
+            }
+            if (oldServer != _currentServer)
+            {
+            }
+            return _currentServer;  //current server cached for CachedInterval
+        }
+
+        public void ReloadServers()
+        {
+            ChooseNewServer(_controller.GetCurrentConfiguration().configs);
+            timer?.Change(0, CachedInterval);
+        }
+
+        public void SetFailure(Server server)
+        {
+            Logging.Debug(String.Format("failure: {0}", server.FriendlyName()));
+        }
+
+        public void UpdateLastRead(Server server)
+        {
+            //TODO: combine this part of data with ICMP statics
+        }
+
+        public void UpdateLastWrite(Server server)
+        {
+            //TODO: combine this part of data with ICMP statics
+        }
+
+        public void UpdateLatency(Server server, TimeSpan latency)
+        {
+            //TODO: combine this part of data with ICMP statics
+        }
+
+    }
+}
@@ -13,6 +13,7 @@ namespace Shadowsocks.Controller.Strategy
            _strategies = new List<IStrategy>();
            _strategies.Add(new BalancingStrategy(controller));
            _strategies.Add(new HighAvailabilityStrategy(controller));
+            _strategies.Add(new SimplyChooseByStatisticsStrategy(controller));
            // TODO: load DLL plugins
        }
        public IList<IStrategy> GetStrategies()
@@ -55,6 +55,7 @@ namespace Shadowsocks.Controller
                        else
                            pacUrl = "http://127.0.0.1:" + config.localPort.ToString() + "/pac?t=" + GetTimestamp(DateTime.Now);
                        registry.SetValue("ProxyEnable", 0);
+                        var readProxyServer = registry.GetValue("ProxyServer");
                        registry.SetValue("ProxyServer", "");
                        registry.SetValue("AutoConfigURL", pacUrl);
                    }
@@ -65,6 +66,8 @@ namespace Shadowsocks.Controller
                    registry.SetValue("ProxyServer", "");
                    registry.SetValue("AutoConfigURL", "");
                }
+                //Set AutoDetectProxy Off
+                IEAutoDetectProxy(false);
                SystemProxy.NotifyIE();
                //Must Notify IE first, or the connections do not chanage
                CopyProxySettingFromLan();
@@ -106,5 +109,30 @@ namespace Shadowsocks.Controller
        {
            return value.ToString("yyyyMMddHHmmssffff");
        }
+
+        /// <summary>
+        /// Checks or unchecks the IE Options Connection setting of "Automatically detect Proxy"
+        /// </summary>
+        /// <param name="set">Provide 'true' if you want to check the 'Automatically detect Proxy' check box. To uncheck, pass 'false'</param>
+        private static void IEAutoDetectProxy(bool set)
+        {
+            RegistryKey registry =
+                Registry.CurrentUser.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Connections",
+                    true);
+            byte[] defConnection = (byte[])registry.GetValue("DefaultConnectionSettings");
+            byte[] savedLegacySetting = (byte[])registry.GetValue("SavedLegacySettings");
+            if (set)
+            {
+                defConnection[8] = Convert.ToByte(defConnection[8] & 8);
+                savedLegacySetting[8] = Convert.ToByte(savedLegacySetting[8] & 8);
+            }
+            else
+            {
+                defConnection[8] = Convert.ToByte(defConnection[8] & ~8);
+                savedLegacySetting[8] = Convert.ToByte(savedLegacySetting[8] & ~8);
+            }
+            registry.SetValue("DefaultConnectionSettings", defConnection);
+            registry.SetValue("SavedLegacySettings", savedLegacySetting);
+        }
    }
 }
@@ -19,12 +19,14 @@ Update Local PAC from GFWList=从 GFWList 更新本地 PAC
 Edit User Rule for GFWList...=编辑 GFWList 的用户规则...
 Show QRCode...=显示二维码...
 Scan QRCode from Screen...=扫描屏幕上的二维码...
+Availability Statistics=统计可用性
 Show Logs...=显示日志...
 About...=关于...
 Quit=退出
 Edit Servers=编辑服务器
 Load Balance=负载均衡
 High Availability=高可用
+Choose By Total Package Loss=累计丢包率

 # Config Form

@@ -40,6 +42,19 @@ Remarks=备注
 OK=确定
 Cancel=取消
 New server=未配置的服务器
+Move &Up=上移(&U)
+Move D&own=下移(&O)
+
+# Log Form
+
+&File=文件(&F)
+&Open Location=在资源管理器中打开(&O)
+E&xit=退出(&X)
+&Clean logs=清空(&C)
+&Font=字体(&F)
+&Wrap text=自动换行(&W)
+&Top most=置顶(&T)
+Log Viewer=日志查看器

 # QRCode Form

@@ -71,7 +86,10 @@ Failed to update PAC file =更新 PAC 文件失败
 PAC updated=更新 PAC 成功
 No updates found. Please report to GFWList if you have problems with it.=未发现更新。如有问题请提交给 GFWList。
 No QRCode found. Try to zoom in or move it to the center of the screen.=未发现二维码，尝试把它放大或移动到靠近屏幕中间的位置
+Shadowsocks is already running.=Shadowsocks 已经在运行。
+Find Shadowsocks icon in your notify tray.=请在任务栏里寻找 Shadowsocks 图标。
+If you want to start multiple Shadowsocks, make a copy in another directory.=如果想同时启动多个，可以另外复制一份到别的目录。
 Failed to decode QRCode=无法解析二维码
 Failed to update registry=无法修改注册表
 System Proxy On: =系统代理已启用：
-Running: Port {0}=正在运行：端口 {0}
+Running: Port {0}=正在运行：端口 {0}
@@ -1,10 +0,0 @@
-proxyAddress = "__POLIPO_BIND_IP__"
-proxyPort = 8123
-
-socksParentProxy = "127.0.0.1:__SOCKS_PORT__"
-socksProxyType = socks5
-diskCacheRoot = ""
-localDocumentRoot = ""
-
-allowedPorts = 1-65535
-tunnelAllowedPorts = 1-65535
@@ -0,0 +1,5 @@
+listen-address __POLIPO_BIND_IP__:8123
+show-on-task-bar 0
+activity-animation 0
+forward-socks5 / 127.0.0.1:__SOCKS_PORT__ .
+hide-console
@@ -26,7 +26,6 @@ namespace Shadowsocks.Encryption
        protected int keyLen;
        protected int ivLen;

-
        public IVEncryptor(string method, string password)
            : base(method, password)
        {
@@ -89,7 +88,8 @@ namespace Shadowsocks.Encryption
        protected static void randBytes(byte[] buf, int length)
        {
            byte[] temp = new byte[length];
-            new Random().NextBytes(temp);
+            RNGCryptoServiceProvider rngServiceProvider = new RNGCryptoServiceProvider();
+            rngServiceProvider.GetBytes(temp);
            temp.CopyTo(buf, 0);
        }

@@ -1,5 +1,6 @@
 using Shadowsocks.Controller;
 using Shadowsocks.Properties;
+using Shadowsocks.Util;
 using System;
 using System.Collections.Generic;
 using System.IO;
@@ -18,7 +19,7 @@ namespace Shadowsocks.Encryption

        static PolarSSL()
        {
-            string tempPath = Path.GetTempPath();
+            string tempPath = Utils.GetTempPath();
            string dllPath = tempPath + "/libsscrypto.dll";
            try
            {
@@ -49,7 +50,6 @@ namespace Shadowsocks.Encryption
        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
        public extern static int aes_crypt_cfb128(IntPtr ctx, int mode, int length, ref int iv_off, byte[] iv, byte[] input, byte[] output);

-
        public const int ARC4_CTX_SIZE = 264;

        [DllImport(DLLNAME, CallingConvention = CallingConvention.Cdecl)]
@@ -1,5 +1,6 @@
 using Shadowsocks.Controller;
 using Shadowsocks.Properties;
+using Shadowsocks.Util;
 using System;
 using System.Collections.Generic;
 using System.IO;
@@ -14,7 +15,7 @@ namespace Shadowsocks.Encryption

        static Sodium()
        {
-            string tempPath = Path.GetTempPath();
+            string tempPath = Utils.GetTempPath();
            string dllPath = tempPath + "/libsscrypto.dll";
            try
            {
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Text;
+using System.Threading;

 namespace Shadowsocks.Encryption
 {
@@ -12,19 +13,17 @@ namespace Shadowsocks.Encryption

        const int SODIUM_BLOCK_SIZE = 64;

+        static byte[] sodiumBuf = new byte[MAX_INPUT_SIZE + SODIUM_BLOCK_SIZE];
+
        protected int _encryptBytesRemaining;
        protected int _decryptBytesRemaining;
        protected ulong _encryptIC;
        protected ulong _decryptIC;
-        protected byte[] _encryptBuf;
-        protected byte[] _decryptBuf;

        public SodiumEncryptor(string method, string password)
            : base(method, password)
        {
            InitKey(method, password);
-            _encryptBuf = new byte[MAX_INPUT_SIZE + SODIUM_BLOCK_SIZE];
-            _decryptBuf = new byte[MAX_INPUT_SIZE + SODIUM_BLOCK_SIZE];
        }

        private static Dictionary<string, int[]> _ciphers = new Dictionary<string, int[]> {
@@ -47,48 +46,51 @@ namespace Shadowsocks.Encryption
            // TODO write a unidirection cipher so we don't have to if if if
            int bytesRemaining;
            ulong ic;
-            byte[] sodiumBuf;
            byte[] iv;
-            if (isCipher)
-            {
-                bytesRemaining = _encryptBytesRemaining;
-                ic = _encryptIC;
-                sodiumBuf = _encryptBuf;
-                iv = _encryptIV;
-            }
-            else
-            {
-                bytesRemaining = _decryptBytesRemaining;
-                ic = _decryptIC;
-                sodiumBuf = _decryptBuf;
-                iv = _decryptIV;
-            }
-            int padding = bytesRemaining;
-            Buffer.BlockCopy(buf, 0, sodiumBuf, padding, length);

-            switch (_cipher)
+            // I'm tired. just add a big lock
+            // let's optimize for RAM instead of CPU
+            lock(sodiumBuf)
            {
-                case CIPHER_SALSA20:
-                    Sodium.crypto_stream_salsa20_xor_ic(sodiumBuf, sodiumBuf, (ulong)(padding + length), iv, ic, _key);
-                    break;
-                case CIPHER_CHACHA20:
-                    Sodium.crypto_stream_chacha20_xor_ic(sodiumBuf, sodiumBuf, (ulong)(padding + length), iv, ic, _key);
-                    break;
-            }
-            Buffer.BlockCopy(sodiumBuf, padding, outbuf, 0, length);
-            padding += length;
-            ic += (ulong)padding / SODIUM_BLOCK_SIZE;
-            bytesRemaining = padding % SODIUM_BLOCK_SIZE;
+                if (isCipher)
+                {
+                    bytesRemaining = _encryptBytesRemaining;
+                    ic = _encryptIC;
+                    iv = _encryptIV;
+                }
+                else
+                {
+                    bytesRemaining = _decryptBytesRemaining;
+                    ic = _decryptIC;
+                    iv = _decryptIV;
+                }
+                int padding = bytesRemaining;
+                Buffer.BlockCopy(buf, 0, sodiumBuf, padding, length);

-            if (isCipher)
-            {
-                _encryptBytesRemaining = bytesRemaining;
-                _encryptIC = ic;
-            }
-            else
-            {
-                _decryptBytesRemaining = bytesRemaining;
-                _decryptIC = ic;
+                switch (_cipher)
+                {
+                    case CIPHER_SALSA20:
+                        Sodium.crypto_stream_salsa20_xor_ic(sodiumBuf, sodiumBuf, (ulong)(padding + length), iv, ic, _key);
+                        break;
+                    case CIPHER_CHACHA20:
+                        Sodium.crypto_stream_chacha20_xor_ic(sodiumBuf, sodiumBuf, (ulong)(padding + length), iv, ic, _key);
+                        break;
+                }
+                Buffer.BlockCopy(sodiumBuf, padding, outbuf, 0, length);
+                padding += length;
+                ic += (ulong)padding / SODIUM_BLOCK_SIZE;
+                bytesRemaining = padding % SODIUM_BLOCK_SIZE;
+
+                if (isCipher)
+                {
+                    _encryptBytesRemaining = bytesRemaining;
+                    _encryptIC = ic;
+                }
+                else
+                {
+                    _decryptBytesRemaining = bytesRemaining;
+                    _decryptIC = ic;
+                }
            }
        }

@@ -41,7 +41,6 @@ namespace Shadowsocks.Encryption
            outlength = length;
        }

-
        public override void Decrypt(byte[] buf, int length, byte[] outbuf, out int outlength)
        {
            byte[] result = new byte[length];
@@ -100,7 +99,6 @@ namespace Shadowsocks.Encryption
            return sorted;
        }

-
        public override void Dispose()
        {
        }
@@ -22,6 +22,7 @@ namespace Shadowsocks.Model
        public int localPort;
        public string pacUrl;
        public bool useOnlinePac;
+        public bool availabilityStatistics;

        private static string CONFIG_FILE = "gui-config.json";

@@ -55,6 +56,13 @@ namespace Shadowsocks.Model
                {
                    config.localPort = 1080;
                }
+                if (config.index == -1)
+                {
+                    if (config.strategy == null)
+                    {
+                        config.index = 0;
+                    }
+                }
                return config;
            }
            catch (Exception e)
@@ -86,6 +94,13 @@ namespace Shadowsocks.Model
            {
                config.index = -1;
            }
+            if (config.index == -1)
+            {
+                if (config.strategy == null)
+                {
+                    config.index = 0;
+                }
+            }
            config.isDefault = false;
            try
            {
@@ -121,6 +136,11 @@ namespace Shadowsocks.Model
            {
                throw new ArgumentException(I18N.GetString("Port out of range"));
            }
+        }
+
+        public static void CheckLocalPort(int port)
+        {
+            CheckPort(port);
            if (port == 8123)
            {
                throw new ArgumentException(I18N.GetString("Port can't be 8123"));
@@ -18,8 +18,8 @@ namespace Shadowsocks
        [STAThread]
        static void Main()
        {
-            Util.Utils.ReleaseMemory();
-            using (Mutex mutex = new Mutex(false, "Global\\" + "71981632-A427-497F-AB91-241CD227EC1F"))
+            Util.Utils.ReleaseMemory(true);
+            using (Mutex mutex = new Mutex(false, "Global\\Shadowsocks_" + Application.StartupPath.GetHashCode()))
            {
                Application.EnableVisualStyles();
                Application.SetCompatibleTextRenderingDefault(false);
@@ -31,7 +31,9 @@ namespace Shadowsocks
                    {
                        Process oldProcess = oldProcesses[0];
                    }
-                    MessageBox.Show("Shadowsocks is already running.\n\nFind Shadowsocks icon in your notify tray.");
+                    MessageBox.Show(I18N.GetString("Find Shadowsocks icon in your notify tray.") + "\n" +
+                        I18N.GetString("If you want to start multiple Shadowsocks, make a copy in another directory."),
+                        I18N.GetString("Shadowsocks is already running."));
                    return;
                }
                Directory.SetCurrentDirectory(Application.StartupPath);
@@ -1,7 +1,7 @@
 //------------------------------------------------------------------------------
 // <auto-generated>
 //     This code was generated by a tool.
-//     Runtime Version:4.0.30319.34209
+//     Runtime Version:4.0.30319.42000
 //
 //     Changes to this file may cause incorrect behavior and will be lost if
 //     the code is regenerated.
@@ -113,29 +113,34 @@ namespace Shadowsocks.Properties {
        }
        
        /// <summary>
-        ///   Looks up a localized string similar to proxyAddress = &quot;__POLIPO_BIND_IP__&quot;
-        ///proxyPort = 8123
-        ///
-        ///socksParentProxy = &quot;127.0.0.1:__SOCKS_PORT__&quot;
-        ///socksProxyType = socks5
-        ///diskCacheRoot = &quot;&quot;
-        ///localDocumentRoot = &quot;&quot;
-        ///
-        ///allowedPorts = 1-65535
-        ///tunnelAllowedPorts = 1-65535.
+        ///   Looks up a localized resource of type System.Byte[].
        /// </summary>
-        internal static string polipo_config {
+        internal static byte[] mgwz_dll {
            get {
-                return ResourceManager.GetString("polipo_config", resourceCulture);
+                object obj = ResourceManager.GetObject("mgwz_dll", resourceCulture);
+                return ((byte[])(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to listen-address __POLIPO_BIND_IP__:8123
+        ///show-on-task-bar 0
+        ///activity-animation 0
+        ///forward-socks5 / 127.0.0.1:__SOCKS_PORT__ .
+        ///hide-console.
+        /// </summary>
+        internal static string privoxy_conf {
+            get {
+                return ResourceManager.GetString("privoxy_conf", resourceCulture);
            }
        }
        
        /// <summary>
        ///   Looks up a localized resource of type System.Byte[].
        /// </summary>
-        internal static byte[] polipo_exe {
+        internal static byte[] privoxy_exe {
            get {
-                object obj = ResourceManager.GetObject("polipo_exe", resourceCulture);
+                object obj = ResourceManager.GetObject("privoxy_exe", resourceCulture);
                return ((byte[])(obj));
            }
        }
@@ -112,12 +112,12 @@
    <value>2.0</value>
  </resheader>
  <resheader name="reader">
-    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
  </resheader>
  <resheader name="writer">
-    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
  </resheader>
-  <assembly alias="System.Windows.Forms" name="System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
+  <assembly alias="System.Windows.Forms" name="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
  <data name="abp_js" type="System.Resources.ResXFileRef, System.Windows.Forms">
    <value>..\Data\abp.js.gz;System.Byte[], mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
  </data>
@@ -127,11 +127,14 @@
  <data name="libsscrypto_dll" type="System.Resources.ResXFileRef, System.Windows.Forms">
    <value>..\data\libsscrypto.dll.gz;System.Byte[], mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
  </data>
-  <data name="polipo_config" type="System.Resources.ResXFileRef, System.Windows.Forms">
-    <value>..\Data\polipo_config.txt;System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089;gb2312</value>
+  <data name="mgwz_dll" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\data\mgwz.dll.gz;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
  </data>
-  <data name="polipo_exe" type="System.Resources.ResXFileRef, System.Windows.Forms">
-    <value>..\Data\polipo.exe.gz;System.Byte[], mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  <data name="privoxy_conf" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\data\privoxy_conf.txt;System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089;utf-8</value>
+  </data>
+  <data name="privoxy_exe" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\data\privoxy.exe.gz;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
  </data>
  <data name="proxy_pac_txt" type="System.Resources.ResXFileRef, System.Windows.Forms">
    <value>..\Data\proxy.pac.txt.gz;System.Byte[], mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
@@ -5,12 +5,31 @@ using System.IO;
 using System.IO.Compression;
 using System.Runtime.InteropServices;
 using System.Text;
+using System.Windows.Forms;

 namespace Shadowsocks.Util
 {
    public class Utils
    {
-        public static void ReleaseMemory()
+        // return path to store temporary files
+        public static string GetTempPath()
+        {
+            if (File.Exists(Application.StartupPath + "\\shadowsocks_portable_mode.txt"))
+            {
+                try
+                {
+                    Directory.CreateDirectory(Application.StartupPath + "\\temp");
+                } catch (Exception e)
+                {
+                    Console.WriteLine(e);
+                }
+                // don't use "/", it will fail when we call explorer /select xxx/temp\xxx.log
+                return Application.StartupPath + "\\temp";
+            }
+            return Path.GetTempPath();
+        }
+
+        public static void ReleaseMemory(bool removePages)
        {
            // release any unused pages
            // making the numbers look good in task manager
@@ -20,8 +39,29 @@ namespace Shadowsocks.Util
            // which is part of user experience
            GC.Collect(GC.MaxGeneration);
            GC.WaitForPendingFinalizers();
-            SetProcessWorkingSetSize(Process.GetCurrentProcess().Handle,
-                (UIntPtr)0xFFFFFFFF, (UIntPtr)0xFFFFFFFF);
+            if (removePages)
+            {
+                // as some users have pointed out
+                // removing pages from working set will cause some IO
+                // which lowered user experience for another group of users
+                //
+                // so we do 2 more things here to satisfy them:
+                // 1. only remove pages once when configuration is changed
+                // 2. add more comments here to tell users that calling
+                //    this function will not be more frequent than
+                //    IM apps writing chat logs, or web browsers writing cache files
+                //    if they're so concerned about their disk, they should
+                //    uninstall all IM apps and web browsers
+                //
+                // please open an issue if you're worried about anything else in your computer
+                // no matter it's GPU performance, monitor contrast, audio fidelity
+                // or anything else in the task manager
+                // we'll do as much as we can to help you
+                //
+                // just kidding
+                SetProcessWorkingSetSize(Process.GetCurrentProcess().Handle,
+                    (UIntPtr)0xFFFFFFFF, (UIntPtr)0xFFFFFFFF);
+            }
        }

        public static string UnGzip(byte[] buf)
@@ -47,6 +47,9 @@
            this.ServerGroupBox = new System.Windows.Forms.GroupBox();
            this.ServersListBox = new System.Windows.Forms.ListBox();
            this.tableLayoutPanel2 = new System.Windows.Forms.TableLayoutPanel();
+            this.tableLayoutPanel6 = new System.Windows.Forms.TableLayoutPanel();
+            this.MoveDownButton = new System.Windows.Forms.Button();
+            this.MoveUpButton = new System.Windows.Forms.Button();
            this.tableLayoutPanel5 = new System.Windows.Forms.TableLayoutPanel();
            this.ProxyPortTextBox = new System.Windows.Forms.TextBox();
            this.ProxyPortLabel = new System.Windows.Forms.Label();
@@ -55,6 +58,7 @@
            this.tableLayoutPanel1.SuspendLayout();
            this.ServerGroupBox.SuspendLayout();
            this.tableLayoutPanel2.SuspendLayout();
+            this.tableLayoutPanel6.SuspendLayout();
            this.tableLayoutPanel5.SuspendLayout();
            this.tableLayoutPanel3.SuspendLayout();
            this.tableLayoutPanel4.SuspendLayout();
@@ -184,7 +188,7 @@
            // 
            // EncryptionSelect
            // 
-            this.EncryptionSelect.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
+            this.EncryptionSelect.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
            | System.Windows.Forms.AnchorStyles.Right)));
            this.EncryptionSelect.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
            this.EncryptionSelect.FormattingEnabled = true;
@@ -281,6 +285,7 @@
            // 
            this.ServersListBox.FormattingEnabled = true;
            this.ServersListBox.IntegralHeight = false;
+            this.ServersListBox.ItemHeight = 12;
            this.ServersListBox.Location = new System.Drawing.Point(0, 0);
            this.ServersListBox.Margin = new System.Windows.Forms.Padding(0);
            this.ServersListBox.Name = "ServersListBox";
@@ -295,6 +300,7 @@
            this.tableLayoutPanel2.ColumnCount = 2;
            this.tableLayoutPanel2.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
            this.tableLayoutPanel2.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
+            this.tableLayoutPanel2.Controls.Add(this.tableLayoutPanel6, 0, 2);
            this.tableLayoutPanel2.Controls.Add(this.tableLayoutPanel5, 1, 1);
            this.tableLayoutPanel2.Controls.Add(this.tableLayoutPanel3, 1, 2);
            this.tableLayoutPanel2.Controls.Add(this.ServersListBox, 0, 0);
@@ -310,6 +316,48 @@
            this.tableLayoutPanel2.Size = new System.Drawing.Size(427, 238);
            this.tableLayoutPanel2.TabIndex = 7;
            // 
+            // tableLayoutPanel6
+            // 
+            this.tableLayoutPanel6.AutoSize = true;
+            this.tableLayoutPanel6.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
+            this.tableLayoutPanel6.ColumnCount = 2;
+            this.tableLayoutPanel6.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
+            this.tableLayoutPanel6.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
+            this.tableLayoutPanel6.Controls.Add(this.MoveDownButton, 1, 0);
+            this.tableLayoutPanel6.Controls.Add(this.MoveUpButton, 0, 0);
+            this.tableLayoutPanel6.Dock = System.Windows.Forms.DockStyle.Top;
+            this.tableLayoutPanel6.Location = new System.Drawing.Point(0, 211);
+            this.tableLayoutPanel6.Margin = new System.Windows.Forms.Padding(0);
+            this.tableLayoutPanel6.Name = "tableLayoutPanel6";
+            this.tableLayoutPanel6.RowCount = 1;
+            this.tableLayoutPanel6.RowStyles.Add(new System.Windows.Forms.RowStyle());
+            this.tableLayoutPanel6.Size = new System.Drawing.Size(166, 32);
+            this.tableLayoutPanel6.TabIndex = 10;
+            // 
+            // MoveDownButton
+            // 
+            this.MoveDownButton.Dock = System.Windows.Forms.DockStyle.Right;
+            this.MoveDownButton.Location = new System.Drawing.Point(86, 6);
+            this.MoveDownButton.Margin = new System.Windows.Forms.Padding(3, 6, 0, 3);
+            this.MoveDownButton.Name = "MoveDownButton";
+            this.MoveDownButton.Size = new System.Drawing.Size(80, 23);
+            this.MoveDownButton.TabIndex = 7;
+            this.MoveDownButton.Text = "Move D&own";
+            this.MoveDownButton.UseVisualStyleBackColor = true;
+            this.MoveDownButton.Click += new System.EventHandler(this.MoveDownButton_Click);
+            // 
+            // MoveUpButton
+            // 
+            this.MoveUpButton.Dock = System.Windows.Forms.DockStyle.Left;
+            this.MoveUpButton.Location = new System.Drawing.Point(0, 6);
+            this.MoveUpButton.Margin = new System.Windows.Forms.Padding(0, 6, 3, 3);
+            this.MoveUpButton.Name = "MoveUpButton";
+            this.MoveUpButton.Size = new System.Drawing.Size(80, 23);
+            this.MoveUpButton.TabIndex = 6;
+            this.MoveUpButton.Text = "Move &Up";
+            this.MoveUpButton.UseVisualStyleBackColor = true;
+            this.MoveUpButton.Click += new System.EventHandler(this.MoveUpButton_Click);
+            // 
            // tableLayoutPanel5
            // 
            this.tableLayoutPanel5.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
@@ -418,6 +466,7 @@
            this.ServerGroupBox.PerformLayout();
            this.tableLayoutPanel2.ResumeLayout(false);
            this.tableLayoutPanel2.PerformLayout();
+            this.tableLayoutPanel6.ResumeLayout(false);
            this.tableLayoutPanel5.ResumeLayout(false);
            this.tableLayoutPanel5.PerformLayout();
            this.tableLayoutPanel3.ResumeLayout(false);
@@ -453,6 +502,9 @@
        private System.Windows.Forms.TableLayoutPanel tableLayoutPanel5;
        private System.Windows.Forms.TextBox ProxyPortTextBox;
        private System.Windows.Forms.Label ProxyPortLabel;
+        private System.Windows.Forms.TableLayoutPanel tableLayoutPanel6;
+        private System.Windows.Forms.Button MoveDownButton;
+        private System.Windows.Forms.Button MoveUpButton;
    }
 }

@@ -18,7 +18,7 @@ namespace Shadowsocks.View

        // this is a copy of configuration that we are working on
        private Configuration _modifiedConfiguration;
-        private int _oldSelectedIndex = -1;
+        private int _lastSelectedIndex = -1;

        public ConfigForm(ShadowsocksController controller)
        {
@@ -51,6 +51,8 @@ namespace Shadowsocks.View
            ServerGroupBox.Text = I18N.GetString("Server");
            OKButton.Text = I18N.GetString("OK");
            MyCancelButton.Text = I18N.GetString("Cancel");
+            MoveUpButton.Text = I18N.GetString("Move &Up");
+            MoveDownButton.Text = I18N.GetString("Move D&own");
            this.Text = I18N.GetString("Edit Servers");
        }

@@ -58,7 +60,7 @@ namespace Shadowsocks.View
        {
            LoadCurrentConfiguration();
        }
-        
+
        private void ShowWindow()
        {
            this.Opacity = 1;
@@ -70,7 +72,7 @@ namespace Shadowsocks.View
        {
            try
            {
-                if (_oldSelectedIndex == -1 || _oldSelectedIndex >= _modifiedConfiguration.configs.Count)
+                if (_lastSelectedIndex == -1 || _lastSelectedIndex >= _modifiedConfiguration.configs.Count)
                {
                    return true;
                }
@@ -84,10 +86,10 @@ namespace Shadowsocks.View
                };
                int localPort = int.Parse(ProxyPortTextBox.Text);
                Configuration.CheckServer(server);
-                Configuration.CheckPort(localPort);
-                _modifiedConfiguration.configs[_oldSelectedIndex] = server;
+                Configuration.CheckLocalPort(localPort);
+                _modifiedConfiguration.configs[_lastSelectedIndex] = server;
                _modifiedConfiguration.localPort = localPort;
-                
+
                return true;
            }
            catch (FormatException)
@@ -113,12 +115,6 @@ namespace Shadowsocks.View
                ProxyPortTextBox.Text = _modifiedConfiguration.localPort.ToString();
                EncryptionSelect.Text = server.method ?? "aes-256-cfb";
                RemarksTextBox.Text = server.remarks;
-                ServerGroupBox.Visible = true;
-                //IPTextBox.Focus();
-            }
-            else
-            {
-                ServerGroupBox.Visible = false;
            }
        }

@@ -135,12 +131,13 @@ namespace Shadowsocks.View
        {
            _modifiedConfiguration = controller.GetConfigurationCopy();
            LoadConfiguration(_modifiedConfiguration);
-            _oldSelectedIndex = _modifiedConfiguration.index;
-            if (_oldSelectedIndex < 0)
+            _lastSelectedIndex = _modifiedConfiguration.index;
+            if (_lastSelectedIndex < 0)
            {
-                _oldSelectedIndex = 0;
+                _lastSelectedIndex = 0;
            }
-            ServersListBox.SelectedIndex = _oldSelectedIndex;
+            ServersListBox.SelectedIndex = _lastSelectedIndex;
+            UpdateMoveUpAndDownButton();
            LoadSelectedServer();
        }

@@ -149,9 +146,35 @@ namespace Shadowsocks.View

        }

+        private void ConfigForm_KeyDown(object sender, KeyEventArgs e)
+        {
+            // Sometimes the users may hit enter key by mistake, and the form will close without saving entries.
+
+            if (e.KeyCode == Keys.Enter)
+            {
+                Server server = controller.GetCurrentServer();
+                if (!SaveOldSelectedServer())
+                {
+                    return;
+                }
+                if (_modifiedConfiguration.configs.Count == 0)
+                {
+                    MessageBox.Show(I18N.GetString("Please add at least one server"));
+                    return;
+                }
+                controller.SaveServers(_modifiedConfiguration.configs, _modifiedConfiguration.localPort);
+                controller.SelectServerIndex(_modifiedConfiguration.configs.IndexOf(server));
+            }
+
+        }
+
        private void ServersListBox_SelectedIndexChanged(object sender, EventArgs e)
        {
-            if (_oldSelectedIndex == ServersListBox.SelectedIndex)
+            if (!ServersListBox.CanSelect)
+            {
+                return;
+            }
+            if (_lastSelectedIndex == ServersListBox.SelectedIndex)
            {
                // we are moving back to oldSelectedIndex or doing a force move
                return;
@@ -159,11 +182,13 @@ namespace Shadowsocks.View
            if (!SaveOldSelectedServer())
            {
                // why this won't cause stack overflow?
-                ServersListBox.SelectedIndex = _oldSelectedIndex;
+                ServersListBox.SelectedIndex = _lastSelectedIndex;
                return;
            }
+            ServersListBox.Items[_lastSelectedIndex] = _modifiedConfiguration.configs[_lastSelectedIndex].FriendlyName();
+            UpdateMoveUpAndDownButton();
            LoadSelectedServer();
-            _oldSelectedIndex = ServersListBox.SelectedIndex;
+            _lastSelectedIndex = ServersListBox.SelectedIndex;
        }

        private void AddButton_Click(object sender, EventArgs e)
@@ -176,29 +201,30 @@ namespace Shadowsocks.View
            _modifiedConfiguration.configs.Add(server);
            LoadConfiguration(_modifiedConfiguration);
            ServersListBox.SelectedIndex = _modifiedConfiguration.configs.Count - 1;
-            _oldSelectedIndex = ServersListBox.SelectedIndex;
+            _lastSelectedIndex = ServersListBox.SelectedIndex;
        }

        private void DeleteButton_Click(object sender, EventArgs e)
        {
-            _oldSelectedIndex = ServersListBox.SelectedIndex;
-            if (_oldSelectedIndex >= 0 && _oldSelectedIndex < _modifiedConfiguration.configs.Count)
+            _lastSelectedIndex = ServersListBox.SelectedIndex;
+            if (_lastSelectedIndex >= 0 && _lastSelectedIndex < _modifiedConfiguration.configs.Count)
            {
-                _modifiedConfiguration.configs.RemoveAt(_oldSelectedIndex);
+                _modifiedConfiguration.configs.RemoveAt(_lastSelectedIndex);
            }
-            if (_oldSelectedIndex >= _modifiedConfiguration.configs.Count)
+            if (_lastSelectedIndex >= _modifiedConfiguration.configs.Count)
            {
                // can be -1
-                _oldSelectedIndex = _modifiedConfiguration.configs.Count - 1;
+                _lastSelectedIndex = _modifiedConfiguration.configs.Count - 1;
            }
-            ServersListBox.SelectedIndex = _oldSelectedIndex;
+            ServersListBox.SelectedIndex = _lastSelectedIndex;
            LoadConfiguration(_modifiedConfiguration);
-            ServersListBox.SelectedIndex = _oldSelectedIndex;
+            ServersListBox.SelectedIndex = _lastSelectedIndex;
            LoadSelectedServer();
        }

        private void OKButton_Click(object sender, EventArgs e)
        {
+            Server server = controller.GetCurrentServer();
            if (!SaveOldSelectedServer())
            {
                return;
@@ -209,6 +235,7 @@ namespace Shadowsocks.View
                return;
            }
            controller.SaveServers(_modifiedConfiguration.configs, _modifiedConfiguration.localPort);
+            controller.SelectServerIndex(_modifiedConfiguration.configs.IndexOf(server));
            this.Close();
        }

@@ -227,5 +254,70 @@ namespace Shadowsocks.View
            controller.ConfigChanged -= controller_ConfigChanged;
        }

+        private void MoveConfigItem(int step)
+        {
+            int index = ServersListBox.SelectedIndex;
+            Server server = _modifiedConfiguration.configs[index];
+            object item = ServersListBox.SelectedItem;
+
+            _modifiedConfiguration.configs.Remove(server);
+            _modifiedConfiguration.configs.Insert(index + step, server);
+            _modifiedConfiguration.index += step;
+
+            ServersListBox.BeginUpdate();
+            ServersListBox.Enabled = false;
+            _lastSelectedIndex = index + step;
+            ServersListBox.Items.Remove(item);
+            ServersListBox.Items.Insert(index + step, item);
+            ServersListBox.Enabled = true;
+            ServersListBox.SelectedIndex = index + step;
+            ServersListBox.EndUpdate();
+
+            UpdateMoveUpAndDownButton();
+        }
+
+        private void UpdateMoveUpAndDownButton()
+        {
+            if (ServersListBox.SelectedIndex == 0)
+            {
+                MoveUpButton.Enabled = false;
+            }
+            else
+            {
+                MoveUpButton.Enabled = true;
+            }
+            if (ServersListBox.SelectedIndex == ServersListBox.Items.Count - 1)
+            {
+                MoveDownButton.Enabled = false;
+            }
+            else
+            {
+                MoveDownButton.Enabled = true;
+            }
+        }
+
+        private void MoveUpButton_Click(object sender, EventArgs e)
+        {
+            if (!SaveOldSelectedServer())
+            {
+                return;
+            }
+            if (ServersListBox.SelectedIndex > 0)
+            {
+                MoveConfigItem(-1);  // -1 means move backward
+            }
+        }
+
+        private void MoveDownButton_Click(object sender, EventArgs e)
+        {
+            if (!SaveOldSelectedServer())
+            {
+                return;
+            }
+            if (ServersListBox.SelectedIndex < ServersListBox.Items.Count - 1)
+            {
+                MoveConfigItem(+1);  // +1 means move forward
+            }
+        }
    }
 }
@@ -112,9 +112,9 @@
    <value>2.0</value>
  </resheader>
  <resheader name="reader">
-    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
  </resheader>
  <resheader name="writer">
-    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
  </resheader>
 </root>
@@ -0,0 +1,199 @@
+namespace Shadowsocks.View
+{
+    partial class LogForm
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            this.components = new System.ComponentModel.Container();
+            this.LogMessageTextBox = new System.Windows.Forms.TextBox();
+            this.contextMenuStrip1 = new System.Windows.Forms.ContextMenuStrip(this.components);
+            this.mainMenu1 = new System.Windows.Forms.MainMenu(this.components);
+            this.FileMenuItem = new System.Windows.Forms.MenuItem();
+            this.OpenLocationMenuItem = new System.Windows.Forms.MenuItem();
+            this.ExitMenuItem = new System.Windows.Forms.MenuItem();
+            this.panel1 = new System.Windows.Forms.Panel();
+            this.ChangeFontButton = new System.Windows.Forms.Button();
+            this.CleanLogsButton = new System.Windows.Forms.Button();
+            this.WrapTextCheckBox = new System.Windows.Forms.CheckBox();
+            this.tableLayoutPanel1 = new System.Windows.Forms.TableLayoutPanel();
+            this.TopMostCheckBox = new System.Windows.Forms.CheckBox();
+            this.panel1.SuspendLayout();
+            this.tableLayoutPanel1.SuspendLayout();
+            this.SuspendLayout();
+            // 
+            // LogMessageTextBox
+            // 
+            this.LogMessageTextBox.BackColor = System.Drawing.Color.Black;
+            this.LogMessageTextBox.Dock = System.Windows.Forms.DockStyle.Fill;
+            this.LogMessageTextBox.Font = new System.Drawing.Font("Consolas", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.LogMessageTextBox.ForeColor = System.Drawing.Color.White;
+            this.LogMessageTextBox.Location = new System.Drawing.Point(3, 43);
+            this.LogMessageTextBox.MaxLength = 2147483647;
+            this.LogMessageTextBox.Multiline = true;
+            this.LogMessageTextBox.Name = "LogMessageTextBox";
+            this.LogMessageTextBox.ReadOnly = true;
+            this.LogMessageTextBox.ScrollBars = System.Windows.Forms.ScrollBars.Both;
+            this.LogMessageTextBox.Size = new System.Drawing.Size(541, 307);
+            this.LogMessageTextBox.TabIndex = 0;
+            this.LogMessageTextBox.WordWrap = false;
+            // 
+            // contextMenuStrip1
+            // 
+            this.contextMenuStrip1.Name = "contextMenuStrip1";
+            this.contextMenuStrip1.Size = new System.Drawing.Size(61, 4);
+            // 
+            // mainMenu1
+            // 
+            this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
+            this.FileMenuItem});
+            // 
+            // FileMenuItem
+            // 
+            this.FileMenuItem.Index = 0;
+            this.FileMenuItem.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
+            this.OpenLocationMenuItem,
+            this.ExitMenuItem});
+            this.FileMenuItem.Text = "&File";
+            // 
+            // OpenLocationMenuItem
+            // 
+            this.OpenLocationMenuItem.Index = 0;
+            this.OpenLocationMenuItem.Text = "&Open Location";
+            this.OpenLocationMenuItem.Click += new System.EventHandler(this.OpenLocationMenuItem_Click);
+            // 
+            // ExitMenuItem
+            // 
+            this.ExitMenuItem.Index = 1;
+            this.ExitMenuItem.Text = "E&xit";
+            this.ExitMenuItem.Click += new System.EventHandler(this.ExitMenuItem_Click);
+            // 
+            // panel1
+            // 
+            this.panel1.Controls.Add(this.TopMostCheckBox);
+            this.panel1.Controls.Add(this.ChangeFontButton);
+            this.panel1.Controls.Add(this.CleanLogsButton);
+            this.panel1.Controls.Add(this.WrapTextCheckBox);
+            this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;
+            this.panel1.Location = new System.Drawing.Point(3, 3);
+            this.panel1.Name = "panel1";
+            this.panel1.Size = new System.Drawing.Size(541, 34);
+            this.panel1.TabIndex = 1;
+            // 
+            // ChangeFontButton
+            // 
+            this.ChangeFontButton.Location = new System.Drawing.Point(107, 4);
+            this.ChangeFontButton.Name = "ChangeFontButton";
+            this.ChangeFontButton.Size = new System.Drawing.Size(75, 23);
+            this.ChangeFontButton.TabIndex = 2;
+            this.ChangeFontButton.Text = "&Font";
+            this.ChangeFontButton.UseVisualStyleBackColor = true;
+            this.ChangeFontButton.Click += new System.EventHandler(this.ChangeFontButton_Click);
+            // 
+            // CleanLogsButton
+            // 
+            this.CleanLogsButton.Location = new System.Drawing.Point(9, 4);
+            this.CleanLogsButton.Name = "CleanLogsButton";
+            this.CleanLogsButton.Size = new System.Drawing.Size(75, 23);
+            this.CleanLogsButton.TabIndex = 1;
+            this.CleanLogsButton.Text = "&Clean logs";
+            this.CleanLogsButton.UseVisualStyleBackColor = true;
+            this.CleanLogsButton.Click += new System.EventHandler(this.CleanLogsButton_Click);
+            // 
+            // WrapTextCheckBox
+            // 
+            this.WrapTextCheckBox.AutoSize = true;
+            this.WrapTextCheckBox.Location = new System.Drawing.Point(209, 9);
+            this.WrapTextCheckBox.Name = "WrapTextCheckBox";
+            this.WrapTextCheckBox.Size = new System.Drawing.Size(78, 16);
+            this.WrapTextCheckBox.TabIndex = 0;
+            this.WrapTextCheckBox.Text = "&Wrap text";
+            this.WrapTextCheckBox.UseVisualStyleBackColor = true;
+            this.WrapTextCheckBox.CheckedChanged += new System.EventHandler(this.WrapTextCheckBox_CheckedChanged);
+            // 
+            // tableLayoutPanel1
+            // 
+            this.tableLayoutPanel1.ColumnCount = 1;
+            this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 100F));
+            this.tableLayoutPanel1.Controls.Add(this.panel1, 0, 0);
+            this.tableLayoutPanel1.Controls.Add(this.LogMessageTextBox, 0, 1);
+            this.tableLayoutPanel1.Dock = System.Windows.Forms.DockStyle.Fill;
+            this.tableLayoutPanel1.Location = new System.Drawing.Point(0, 0);
+            this.tableLayoutPanel1.Name = "tableLayoutPanel1";
+            this.tableLayoutPanel1.RowCount = 2;
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 40F));
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle());
+            this.tableLayoutPanel1.Size = new System.Drawing.Size(547, 353);
+            this.tableLayoutPanel1.TabIndex = 2;
+            // 
+            // TopMostCheckBox
+            // 
+            this.TopMostCheckBox.AutoSize = true;
+            this.TopMostCheckBox.Location = new System.Drawing.Point(311, 9);
+            this.TopMostCheckBox.Name = "TopMostCheckBox";
+            this.TopMostCheckBox.Size = new System.Drawing.Size(72, 16);
+            this.TopMostCheckBox.TabIndex = 3;
+            this.TopMostCheckBox.Text = "&Top most";
+            this.TopMostCheckBox.UseVisualStyleBackColor = true;
+            this.TopMostCheckBox.CheckedChanged += new System.EventHandler(this.TopMostCheckBox_CheckedChanged);
+            // 
+            // LogForm
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(547, 353);
+            this.Controls.Add(this.tableLayoutPanel1);
+            this.Menu = this.mainMenu1;
+            this.Name = "LogForm";
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Log Viewer";
+            this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.LogForm_FormClosing);
+            this.Load += new System.EventHandler(this.LogForm_Load);
+            this.Shown += new System.EventHandler(this.LogForm_Shown);
+            this.panel1.ResumeLayout(false);
+            this.panel1.PerformLayout();
+            this.tableLayoutPanel1.ResumeLayout(false);
+            this.tableLayoutPanel1.PerformLayout();
+            this.ResumeLayout(false);
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.TextBox LogMessageTextBox;
+        private System.Windows.Forms.ContextMenuStrip contextMenuStrip1;
+        private System.Windows.Forms.MainMenu mainMenu1;
+        private System.Windows.Forms.MenuItem FileMenuItem;
+        private System.Windows.Forms.MenuItem OpenLocationMenuItem;
+        private System.Windows.Forms.MenuItem ExitMenuItem;
+        private System.Windows.Forms.Panel panel1;
+        private System.Windows.Forms.CheckBox WrapTextCheckBox;
+        private System.Windows.Forms.Button CleanLogsButton;
+        private System.Windows.Forms.Button ChangeFontButton;
+        private System.Windows.Forms.TableLayoutPanel tableLayoutPanel1;
+        private System.Windows.Forms.CheckBox TopMostCheckBox;
+    }
+}
@@ -0,0 +1,150 @@
+using Shadowsocks.Controller;
+using Shadowsocks.Properties;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Windows.Forms;
+
+namespace Shadowsocks.View
+{
+    public partial class LogForm : Form
+    {
+        long lastOffset;
+        string filename;
+        Timer timer;
+        const int BACK_OFFSET = 65536;
+
+        public LogForm(string filename)
+        {
+            this.filename = filename;
+            InitializeComponent();
+            this.Icon = Icon.FromHandle(Resources.ssw128.GetHicon());
+
+            UpdateTexts();
+        }
+
+        private void UpdateTexts()
+        {
+            FileMenuItem.Text = I18N.GetString("&File");
+            OpenLocationMenuItem.Text = I18N.GetString("&Open Location");
+            ExitMenuItem.Text = I18N.GetString("E&xit");
+            CleanLogsButton.Text = I18N.GetString("&Clean logs");
+            ChangeFontButton.Text = I18N.GetString("&Font");
+            WrapTextCheckBox.Text = I18N.GetString("&Wrap text");
+            TopMostCheckBox.Text = I18N.GetString("&Top most");
+            this.Text = I18N.GetString("Log Viewer");
+        }
+
+        private void Timer_Tick(object sender, EventArgs e)
+        {
+            UpdateContent();
+        }
+
+        private void InitContent()
+        {
+            using (StreamReader reader = new StreamReader(new FileStream(filename,
+                     FileMode.Open, FileAccess.Read, FileShare.ReadWrite)))
+            {
+                if (reader.BaseStream.Length > BACK_OFFSET)
+                {
+                    reader.BaseStream.Seek(-BACK_OFFSET, SeekOrigin.End);
+                    reader.ReadLine();
+                }
+
+                string line = "";
+                while ((line = reader.ReadLine()) != null)
+                    LogMessageTextBox.AppendText(line + "\r\n");
+
+                LogMessageTextBox.ScrollToCaret();
+
+                lastOffset = reader.BaseStream.Position;
+            }
+        }
+
+        private void UpdateContent()
+        {
+            using (StreamReader reader = new StreamReader(new FileStream(filename,
+                     FileMode.Open, FileAccess.Read, FileShare.ReadWrite)))
+            {
+                reader.BaseStream.Seek(lastOffset, SeekOrigin.Begin);
+
+                string line = "";
+                bool changed = false;
+                while ((line = reader.ReadLine()) != null)
+                {
+                    changed = true;
+                    LogMessageTextBox.AppendText(line + "\r\n");
+                }
+
+                if (changed)
+                {
+                    LogMessageTextBox.ScrollToCaret();
+                }
+
+                lastOffset = reader.BaseStream.Position;
+            }
+        }
+
+        private void LogForm_Load(object sender, EventArgs e)
+        {
+            InitContent();
+            timer = new Timer();
+            timer.Interval = 300;
+            timer.Tick += Timer_Tick;
+            timer.Start();
+        }
+
+        private void LogForm_FormClosing(object sender, FormClosingEventArgs e)
+        {
+            timer.Stop();
+        }
+
+        private void OpenLocationMenuItem_Click(object sender, EventArgs e)
+        {
+            string argument = "/select, \"" + filename + "\"";
+            Console.WriteLine(argument);
+            System.Diagnostics.Process.Start("explorer.exe", argument);
+        }
+
+        private void ExitMenuItem_Click(object sender, EventArgs e)
+        {
+            this.Close();
+        }
+
+        private void LogForm_Shown(object sender, EventArgs e)
+        {
+            LogMessageTextBox.ScrollToCaret();
+        }
+
+        private void WrapTextCheckBox_CheckedChanged(object sender, EventArgs e)
+        {
+            LogMessageTextBox.WordWrap = WrapTextCheckBox.Checked;
+            LogMessageTextBox.ScrollToCaret();
+        }
+
+        private void CleanLogsButton_Click(object sender, EventArgs e)
+        {
+            LogMessageTextBox.Clear();
+        }
+
+        private void ChangeFontButton_Click(object sender, EventArgs e)
+        {
+            FontDialog fd = new FontDialog();
+            fd.Font = LogMessageTextBox.Font;
+            if (fd.ShowDialog() == DialogResult.OK)
+            {
+                LogMessageTextBox.Font = fd.Font;
+            }
+        }
+
+        private void TopMostCheckBox_CheckedChanged(object sender, EventArgs e)
+        {
+            this.TopMost = TopMostCheckBox.Checked;
+        }
+    }
+}
@@ -0,0 +1,126 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <metadata name="contextMenuStrip1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>17, 17</value>
+  </metadata>
+  <metadata name="mainMenu1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>172, 17</value>
+  </metadata>
+</root>
@@ -18,7 +18,7 @@ namespace Shadowsocks.View
        // yes this is just a menu view controller
        // when config form is closed, it moves away from RAM
        // and it should just do anything related to the config form
-        
+
        private ShadowsocksController controller;
        private UpdateChecker updateChecker;

@@ -29,6 +29,7 @@ namespace Shadowsocks.View
        private MenuItem enableItem;
        private MenuItem modeItem;
        private MenuItem AutoStartupItem;
+        private MenuItem AvailabilityStatistics;
        private MenuItem ShareOverLANItem;
        private MenuItem SeperatorItem;
        private MenuItem ConfigItem;
@@ -177,6 +178,7 @@ namespace Shadowsocks.View
                }),
                new MenuItem("-"),
                this.AutoStartupItem = CreateMenuItem("Start on Boot", new EventHandler(this.AutoStartupItem_Click)),
+                this.AvailabilityStatistics = CreateMenuItem("Availability Statistics", new EventHandler(this.AvailabilityStatisticsItem_Click)),
                this.ShareOverLANItem = CreateMenuItem("Allow Clients from LAN", new EventHandler(this.ShareOverLANItem_Click)),
                new MenuItem("-"),
                CreateMenuItem("Show Logs...", new EventHandler(this.ShowLogItem_Click)),
@@ -260,6 +262,7 @@ namespace Shadowsocks.View
            PACModeItem.Checked = !config.global;
            ShareOverLANItem.Checked = config.shareOverLan;
            AutoStartupItem.Checked = AutoStartup.Check();
+            AvailabilityStatistics.Checked = config.availabilityStatistics;
            onlinePACItem.Checked = onlinePACItem.Enabled && config.useOnlinePac;
            localPACItem.Checked = !onlinePACItem.Checked;
            UpdatePACItemsEnabledStatus();
@@ -319,7 +322,7 @@ namespace Shadowsocks.View
        void configForm_FormClosed(object sender, FormClosedEventArgs e)
        {
            configForm = null;
-            Util.Utils.ReleaseMemory();
+            Util.Utils.ReleaseMemory(true);
            ShowFirstTimeBalloon();
        }

@@ -349,7 +352,7 @@ namespace Shadowsocks.View

        private void AboutItem_Click(object sender, EventArgs e)
        {
-            Process.Start("https://github.com/shadowsocks/shadowsocks-csharp");
+            Process.Start("https://github.com/shadowsocks/shadowsocks-windows");
        }

        private void notifyIcon1_DoubleClick(object sender, MouseEventArgs e)
@@ -412,7 +415,7 @@ namespace Shadowsocks.View
        {
            string argument = Logging.LogFile;

-            System.Diagnostics.Process.Start("notepad.exe", argument);
+            new LogForm(argument).Show();
        }

        private void QRCodeItem_Click(object sender, EventArgs e)
@@ -517,12 +520,17 @@ namespace Shadowsocks.View
            Process.Start(_urlToOpen);
        }

-		private void AutoStartupItem_Click(object sender, EventArgs e) {
-			AutoStartupItem.Checked = !AutoStartupItem.Checked;
-			if (!AutoStartup.Set(AutoStartupItem.Checked)) {
-				MessageBox.Show(I18N.GetString("Failed to update registry"));
-			}
-		}
+        private void AutoStartupItem_Click(object sender, EventArgs e) {
+            AutoStartupItem.Checked = !AutoStartupItem.Checked;
+            if (!AutoStartup.Set(AutoStartupItem.Checked)) {
+                MessageBox.Show(I18N.GetString("Failed to update registry"));
+            }
+        }
+
+        private void AvailabilityStatisticsItem_Click(object sender, EventArgs e) {
+            AvailabilityStatistics.Checked = !AvailabilityStatistics.Checked;
+            controller.ToggleAvailabilityStatistics(AvailabilityStatistics.Checked);
+        }

        private void LocalPACItem_Click(object sender, EventArgs e)
        {
@@ -29,6 +29,7 @@
        private void InitializeComponent()
        {
            this.pictureBox1 = new System.Windows.Forms.PictureBox();
+            this.listBox1 = new System.Windows.Forms.ListBox();
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
            this.SuspendLayout();
            // 
@@ -42,6 +43,19 @@
            this.pictureBox1.TabIndex = 1;
            this.pictureBox1.TabStop = false;
            // 
+            // listBox1
+            // 
+            this.listBox1.DisplayMember = "Value";
+            this.listBox1.FormattingEnabled = true;
+            this.listBox1.ItemHeight = 12;
+            this.listBox1.Location = new System.Drawing.Point(224, 10);
+            this.listBox1.Name = "listBox1";
+            this.listBox1.ScrollAlwaysVisible = true;
+            this.listBox1.Size = new System.Drawing.Size(227, 208);
+            this.listBox1.TabIndex = 2;
+            this.listBox1.ValueMember = "Key";
+            this.listBox1.SelectedIndexChanged += new System.EventHandler(this.listBox1_SelectedIndexChanged);
+            // 
            // QRCodeForm
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(96F, 96F);
@@ -49,7 +63,8 @@
            this.AutoSize = true;
            this.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
            this.BackColor = System.Drawing.Color.White;
-            this.ClientSize = new System.Drawing.Size(338, 274);
+            this.ClientSize = new System.Drawing.Size(457, 228);
+            this.Controls.Add(this.listBox1);
            this.Controls.Add(this.pictureBox1);
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
            this.MaximizeBox = false;
@@ -67,5 +82,6 @@
        #endregion

        private System.Windows.Forms.PictureBox pictureBox1;
+        private System.Windows.Forms.ListBox listBox1;
    }
 }
@@ -8,8 +8,10 @@ using System.Data;
 using System.Drawing;
 using System.IO;
 using System.IO.Compression;
+using System.Linq;
 using System.Text;
 using System.Windows.Forms;
+using Shadowsocks.Model;

 namespace Shadowsocks.View
 {
@@ -30,8 +32,8 @@ namespace Shadowsocks.View
            string qrText = ssconfig;
            QRCode code = ZXing.QrCode.Internal.Encoder.encode(qrText, ErrorCorrectionLevel.M);
            ByteMatrix m = code.Matrix;
-            int blockSize = Math.Max(pictureBox1.Height / m.Height, 1);
-            Bitmap drawArea = new Bitmap((m.Width * blockSize), (m.Height * blockSize));
+            int blockSize = Math.Max(pictureBox1.Height/m.Height, 1);
+            Bitmap drawArea = new Bitmap((m.Width*blockSize), (m.Height*blockSize));
            using (Graphics g = Graphics.FromImage(drawArea))
            {
                g.Clear(Color.White);
@@ -43,7 +45,7 @@ namespace Shadowsocks.View
                        {
                            if (m[row, col] != 0)
                            {
-                                g.FillRectangle(b, blockSize * row, blockSize * col, blockSize, blockSize);
+                                g.FillRectangle(b, blockSize*row, blockSize*col, blockSize, blockSize);
                            }
                        }
                    }
@@ -54,7 +56,20 @@ namespace Shadowsocks.View

        private void QRCodeForm_Load(object sender, EventArgs e)
        {
-            GenQR(code);
+            var servers = Configuration.Load();
+            var serverDatas = servers.configs.Select(
+                server =>
+                    new KeyValuePair<string, string>(ShadowsocksController.GetQRCode(server), server.FriendlyName())
+                ).ToList();
+            listBox1.DataSource = serverDatas;
+
+            var selectIndex = serverDatas.FindIndex(serverData => serverData.Key.StartsWith(code));
+            if (selectIndex >= 0) listBox1.SetSelected(selectIndex, true);
+        }
+
+        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
+        {
+            GenQR((sender as ListBox)?.SelectedValue.ToString());
        }
    }
 }
@@ -112,9 +112,9 @@
    <value>2.0</value>
  </resheader>
  <resheader name="reader">
-    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
  </resheader>
  <resheader name="writer">
-    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
  </resheader>
 </root>
@@ -242,7 +242,6 @@ namespace Shadowsocks.View
            SetBitmap(bitmap, 255);
        }

-
        /// <para>Changes the current bitmap with a custom opacity level.  Here is where all happens!</para>
        public void SetBitmap(Bitmap bitmap, byte opacity)
        {
@@ -288,7 +287,6 @@ namespace Shadowsocks.View
            }
        }

-
        protected override CreateParams CreateParams
        {
            get
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
@@ -10,7 +10,7 @@
    <AppDesignerFolder>Properties</AppDesignerFolder>
    <RootNamespace>Shadowsocks</RootNamespace>
    <AssemblyName>Shadowsocks</AssemblyName>
-    <TargetFrameworkVersion>v2.0</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
    <FileAlignment>512</FileAlignment>
    <StartupObject>
    </StartupObject>
@@ -21,8 +21,7 @@
    <UpgradeBackupLocation>
    </UpgradeBackupLocation>
    <OldToolsVersion>3.5</OldToolsVersion>
-    <TargetFrameworkProfile>
-    </TargetFrameworkProfile>
+    <TargetFrameworkProfile>Client</TargetFrameworkProfile>
    <PublishUrl>publish\</PublishUrl>
    <Install>true</Install>
    <InstallFrom>Disk</InstallFrom>
@@ -124,7 +123,9 @@
    <Compile Include="3rd\zxing\ResultPoint.cs" />
    <Compile Include="3rd\zxing\ResultPointCallback.cs" />
    <Compile Include="3rd\zxing\WriterException.cs" />
+    <Compile Include="Controller\Service\AvailabilityStatistics.cs" />
    <Compile Include="Controller\Strategy\HighAvailabilityStrategy.cs" />
+    <Compile Include="Controller\Strategy\SimplyChooseByStatisticsStrategy.cs" />
    <Compile Include="Controller\System\AutoStartup.cs" />
    <Compile Include="Controller\FileManager.cs" />
    <Compile Include="Controller\Service\GFWListUpdater.cs" />
@@ -167,6 +168,12 @@
    <Compile Include="Properties\AssemblyInfo.cs" />
    <Compile Include="Controller\ShadowsocksController.cs" />
    <Compile Include="Controller\System\SystemProxy.cs" />
+    <Compile Include="View\LogForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="View\LogForm.Designer.cs">
+      <DependentUpon>LogForm.cs</DependentUpon>
+    </Compile>
    <Compile Include="View\MenuViewController.cs" />
    <Compile Include="View\QRCodeForm.cs">
      <SubType>Form</SubType>
@@ -186,6 +193,9 @@
      <SubType>Designer</SubType>
      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
    </EmbeddedResource>
+    <EmbeddedResource Include="View\LogForm.resx">
+      <DependentUpon>LogForm.cs</DependentUpon>
+    </EmbeddedResource>
    <EmbeddedResource Include="View\QRCodeForm.resx">
      <DependentUpon>QRCodeForm.cs</DependentUpon>
    </EmbeddedResource>
@@ -195,7 +205,8 @@
    </None>
    <None Include="Data\abp.js.gz" />
    <None Include="Data\libsscrypto.dll.gz" />
-    <None Include="Data\polipo.exe.gz" />
+    <None Include="Data\mgwz.dll.gz" />
+    <None Include="Data\privoxy.exe.gz" />
    <None Include="Data\proxy.pac.txt.gz" />
  </ItemGroup>
  <ItemGroup>
@@ -204,9 +215,9 @@
    <None Include="Resources\ss24.png" />
    <None Include="Resources\ssw128.png" />
    <Content Include="Data\cn.txt" />
+    <Content Include="Data\privoxy_conf.txt" />
    <Content Include="Data\user-rule.txt" />
    <Content Include="shadowsocks.ico" />
-    <None Include="Data\polipo_config.txt" />
  </ItemGroup>
  <ItemGroup>
    <BootstrapperPackage Include="Microsoft.Net.Client.3.5">
Author	SHA1	Message	Date
icylogic	391b1de2cf	Merge pull request #316 from icylogic/release/2.5.7 Release/2.5.7	2015-09-19 16:24:24 +08:00
icylogic	8d2574b003	bump 2.5.7	2015-09-19 16:16:05 +08:00
icylogic	8e1c2193e4	replace Appveyor badges	2015-09-19 16:15:45 +08:00
icylogic	86bf0b3b2c	Merge pull request #315 from icylogic/hotfix/repeated_iv no repeat random number generator by GangZhuo	2015-09-19 15:53:01 +08:00
Gang Zhuo	72ea01d566	no repeat random number generator The stock code use class Random to generate IV, the Random is pseudo random number generator. The IV maybe repeat, this will cause shadowsocks-libev closed the sockets with the error message 'invalid password or cipher'. Reference https://github.com/shadowsocks/shadowsocks-libev/issues/389 Solution is use class RNGCryptoServiceProvider to generate IV, of course it's lower performance, but a little bit.	2015-09-19 15:49:19 +08:00
icylogic	b4699492ad	Merge pull request #309 from huhu2207/master Fix a tiny bug	2015-09-04 18:58:40 +08:00
Jackson Ming Hu	2fdb26c063	Fix a tiny bug Sometimes the users may hit enter key by mistake, and the form will close without saving entries.	2015-09-04 11:59:23 +10:00
icylogic	0f72ba1e48	Merge pull request #308 from icylogic/master Add more clear log for exceptions occured in ICMP tests	2015-09-02 01:47:08 +08:00
icylogic	968c9deca0	Merge branch 'hotfix/more_clear_log'	2015-09-02 01:38:12 +08:00
icylogic	879163dc2b	Add more clear log	2015-09-02 01:23:32 +08:00
clowwindy	b07a9ef3b0	Merge pull request #300 from kimw/master improved `log viewer` windows	2015-08-19 07:42:45 -07:00
clowwindy	c095030041	Update README.md	2015-08-19 22:36:38 +08:00
clowwindy	b8858c4f8d	bump 2.5.6	2015-08-19 22:19:20 -07:00
clowwindy	726200c0f1	update CHANGES	2015-08-19 21:56:31 -07:00
clowwindy	765720dbd9	small fix	2015-08-19 21:51:28 -07:00
clowwindy	c767f55b3c	add portable mode	2015-08-19 21:39:06 -07:00
kimw	14381cf887	update version number	2015-08-19 22:23:54 +08:00
kimw	e8fd92b9f7	Merge remote-tracking branch 'upstream/master'	2015-08-19 21:59:01 +08:00
kimw	99fe540e53	Merge remote-tracking branch 'upstream/master'	2015-08-19 21:55:40 +08:00
kimw	cec6f79e7e	improved `log viewer`: 1. add `clean log` feature 2. add `change font` feature 3. add `wrap text` feature 4. add `top most` feature	2015-08-19 21:52:16 +08:00
clowwindy	7ab5eae64c	Merge pull request #297 from kimw/master 2 fixes, 1 feature, 1 code beautify	2015-08-19 04:39:49 -07:00
clowwindy	b1ebfe7772	prevent moving up and down when unsaved	2015-08-19 19:35:37 -07:00
kimw	f6085d9362	Merge remote-tracking branch 'upstream/master'	2015-08-19 18:39:23 +08:00
kimw	0b6dd0d653	refresh server list with friendly name	2015-08-19 18:38:11 +08:00
clowwindy	7081819390	timeout 30min -> 15min	2015-08-19 13:05:12 +08:00
kimw	1df5e4eb8a	Merge remote-tracking branch 'upstream/master'	2015-08-19 00:30:29 +08:00
kimw	758c497eba	same the source code format. 1/ removed dual empty line 2/ removed tailing spaces 3/ converted tabs into spaces 4/ added some TODO comments	2015-08-19 00:24:08 +08:00
kimw	3e1044fc41	rename variable `_oldSelectedIndex` to `_lastSelectedIndex`	2015-08-19 00:22:23 +08:00
kimw	feaf7f70d0	fix translation typo	2015-08-19 00:20:39 +08:00
clowwindy	e21eac1e40	Merge pull request #296 from kimw/master support customize the server order	2015-08-18 08:55:38 -07:00
clowwindy	750ee4fa5f	add handler timeout	2015-08-18 21:34:05 -07:00
clowwindy	3bc77d212a	reduce cache size	2015-08-18 21:34:04 -07:00
kimw	b623216af3	Merge remote-tracking branch 'upstream/master'	2015-08-18 23:51:53 +08:00
kimw	f33fb04b89	support customize the server order	2015-08-18 23:48:52 +08:00
clowwindy	63b31f5aba	fix translation	2015-08-18 05:07:38 +08:00
clowwindy	590322bca2	fix some translation	2015-08-18 05:07:04 +08:00
clowwindy	71bd0d2b5a	improve user experience for some users	2015-08-18 04:26:11 -07:00
clowwindy	3b90b2124f	Update README.md	2015-08-17 21:03:11 +08:00
clowwindy	85dc46d11e	Update README.md	2015-08-17 20:55:01 +08:00
clowwindy	fe692f89e1	Update README.md	2015-08-17 20:46:51 +08:00
clowwindy	e84825c25d	fix a path problem	2015-08-17 20:19:21 -07:00
clowwindy	05726cdb67	revert part of #257	2015-08-17 20:00:24 -07:00
clowwindy	ab38538b34	allow multiple instances	2015-08-17 19:49:49 -07:00
clowwindy	4f92fabc88	Merge pull request #289 from PINK-FL0YD/patch-1 Update UpdateChecker.cs	2015-08-17 17:27:13 +08:00
Pink Floyd	9522d1d17b	Update UpdateChecker.cs Update UpdateURL	2015-08-17 17:24:35 +08:00
clowwindy	36c61b7dd5	Merge pull request #283 from icylogic/hotfix/PingException hotfix/PingException	2015-08-17 11:59:33 +08:00
icylogic	90f8b1257a	Merge remote-tracking branch 'upstream/master'	2015-08-17 11:34:14 +08:00
icylogic	7978817492	fixed #280 , log "No such host is known" and other PingException	2015-08-17 11:32:03 +08:00
clowwindy	1b8584e6e1	Update README.md	2015-08-17 10:57:59 +08:00
clowwindy	9085480d0b	Merge pull request #279 from cicku/patch-1 Add gfwlist links	2015-08-17 10:57:20 +08:00
Christopher Meng	23b90b8697	Add gfwlist links Various fixes accompanied.	2015-08-17 08:43:03 +08:00
clowwindy	2449d2a5df	Update README.md	2015-08-16 22:15:06 +08:00
clowwindy	e8cbd92a8e	update CHANGES	2015-08-16 22:05:12 -07:00
clowwindy	b4647e5b15	bump	2015-08-16 22:04:25 -07:00
clowwindy	7d2c292034	prevent privoxy from showing tray icon	2015-08-16 22:04:24 -07:00
clowwindy	cd49ca88a2	Update README.md	2015-08-16 19:23:10 +08:00
clowwindy	a3f724a1dc	Update CHANGES	2015-08-16 18:26:28 +08:00
clowwindy	b238aaf8cc	bump 2.5.3	2015-08-16 18:17:53 -07:00
clowwindy	674e120af3	fix proj	2015-08-16 18:17:22 -07:00
clowwindy	fdf91705ac	minor fixes	2015-08-16 18:13:08 -07:00
clowwindy	4e01a40dd8	replace polipo with privoxy	2015-08-16 18:07:05 -07:00
clowwindy	766b9aac56	revert gc	2015-08-16 15:46:57 -07:00
clowwindy	4e9113a7b5	Update README.md	2015-08-15 01:39:48 +08:00
clowwindy	f5a63ef1cf	Merge pull request #265 from icylogic/feature/availability_log Add availability statistics service and a simple strategy	2015-08-11 14:50:17 +08:00
icylogic	26557bfdc3	adjust interval of statistics	2015-08-11 12:17:03 +08:00
icylogic	56ec95862c	implicitly implement	2015-08-11 12:16:26 +08:00
icylogic	40cb772823	adjust description	2015-08-11 11:41:27 +08:00
icylogic	295beaf8ee	prevent null reference exception log	2015-08-11 11:13:19 +08:00
icylogic	b36b25af06	Avoid output when disabled	2015-08-11 10:56:12 +08:00
icylogic	0e4f0f17cd	Add availability statistics service and a simple strategy Strategy: Simply Choose By Statistics	2015-08-11 02:59:56 +08:00
clowwindy	ae07f8772a	Merge pull request #257 from li3shiyi/master 启用系统代理时禁用“自动检测设置”，并且无必要时不清除原有代理服务器设置。	2015-08-07 21:52:59 +08:00
li3shiyi	33e06067ac	全局模式切换到PAC模式时，清除ProxyServer	2015-08-07 18:22:23 +08:00
li3shiyi	0f748bd933	启用系统代理时禁用“自动检测设置”，并且无必要时不清除原有代理服务器设置。	2015-08-07 15:12:36 +08:00
clowwindy	1fec3a125c	Merge pull request #256 from JeffreyZhang105/master Added list of servers in QRCode generate window to select.	2015-08-07 03:11:31 +08:00
Jeffrey Zhang	5ed40c7565	Added list of servers in QRCode generate window to select. To add multiple servers in android phone, now it is no need to chose server one by one and generate QRCode for each. Just need to select the server listed in right.	2015-08-07 00:53:07 +08:00
clowwindy	fbbc9a70bd	Update README.md	2015-08-04 02:20:43 +08:00
clowwindy	45e0968d29	fix #238	2015-08-04 02:17:37 -07:00
clowwindy	e634b7eca1	remove unused var	2015-08-04 02:14:30 -07:00
clowwindy	7425e09ebc	fix log not scrolled to bottom when first shown	2015-08-04 02:08:48 -07:00
clowwindy	e1a90da2a4	will not distinguish .Net 2.0 and 4.0	2015-08-04 01:59:17 -07:00
clowwindy	6a5432c861	bump 2.5.2	2015-08-04 01:47:21 -07:00
clowwindy	5acfadcdb6	add log viewer	2015-08-04 01:39:07 -07:00
clowwindy	9901c2a574	upgrade to VS2015 and .Net 4.0	2015-08-02 23:30:38 -07:00
clowwindy	e038beee3e	Update README.md	2015-08-02 22:38:19 +08:00
clowwindy	c66ede2f59	fix a warning	2015-07-26 12:38:08 +08:00
clowwindy	c54735e0e4	small fix	2015-07-26 12:37:42 +08:00
clowwindy	60dc9e7d71	bump 2.5.1	2015-07-26 12:32:35 +08:00
clowwindy	02f75f899f	update CHANGES	2015-07-26 12:32:17 +08:00
clowwindy	eda92b80e1	refine logs	2015-07-26 12:27:34 +08:00
clowwindy	ccec6be210	prevent jittering and fix server settings update in HA	2015-07-26 12:08:28 +08:00
clowwindy	01c059c4e3	fix server index problem	2015-07-26 11:37:09 +08:00
clowwindy	a0e79f37bc	fix #235	2015-07-26 10:44:44 +08:00