This fix the proxy issue on win10 insider preview.

Fix #926

Let TCP stack find a free port for us

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Otherwise we will update proxy twice.

Use singleton mode for hotkey callbacks.

This gives us the possibility to chose SS server based on dest address.

Refine RNG usage

- Create instance once, bind it to ShadowsocksController

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Also, fix typo in ProxyForm

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Get rid of tricky registry handling

Several files come from https://code.msdn.microsoft.com/windowsapps/CSWebBrowserWithProxy-c8535715/view/SourceCode

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Shadowsocks don't need to reconnect, which is the software's
responsibility to retry.

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

- Use readonly object as lock

Info from stackoverflow:

If I want to be sure that it will be locked for all threads inside my
application:
The lock object has to be static, if it locks access to static state.
Otherwise it has to be instance, because there's no need to lock state of
one class instance, and prevent other threads to work with another class
instance at the same time.

everyone says that the object has to be "readonly" I didn't found the
reason
Well, it doesn't have to be. This is just a best practice, which helps you
to avoid errors.

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

It is better to log them.

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

* Add HTTP proxy support in forward proxy

Signed-off-by: noisyfox <timemanager.rick@gmail.com>

* Typo

* Throw exception if forward proxy not supported.

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

after creation.

Becuase we put handler.Start() call after timeout check and
lastActivity is initialized in Start(), this will lead to a
incorrect timeout.

Also because we will call handler.Start() right after the
constructor and timeout check, so it makes no difference
where we put the initializtion of lastActivity. We won't do
this again in Start() because DateTime.Now will consumes a
lot of cpu time.

When using http proxy, this will cause distinct latency
if we are trying to resolve localhost.

Currently it's unnecessary to do that because our privoxy
doesn't listern on ipv6 address, so it's ok to hard code
the ipv4 address.

There is a plan to add a cache to record the ipv6 connectivity
so that we needn't to try both ipv4 and ipv6 every time when we
attempt to connect a DnsEndPoint.

Design:

Use the plain string for both config and hotkey parsing
and make use of KeyConverter, ModifierKeysConverter
to make it more rubust.

Find corresponding label (to display operation result) and callback (to do the real work) based on textbox name. In this case, they should be named as `<Feature-Name><Control-Name>`.

ShowLogsTextBox,
ShowLogsLabel,
ShowLogsCallback.

If this requirement doesn't meet, throw an exception at runtime.

Logic:

How to input keys:
1. put focus in the corresponding textbox
2. press the key combination you want to use
3. when you think it is ready, release all keys
4. the textbox shows your input

How to change keys:
1. put focus in the corresponding textbox
2. press BackSpace to clear content
3. re-input new one

How to deactivate:
1. clear content in the textbox
2. press OK button

Meaning of label color:
- Green: this combination is not occupied by other programs and register successfully
- Yellow: this combination is occupied by other programs and you have to change to another one
- Transparent without color: initial status

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

- Drop irrelevant changes
- Closes #723

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

- Only use one instance of LogForm

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

- Move to seperate model

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

- New wrapper to handle tcp socket connection.
- Fix some memory leak.

Signed-off-by: noisyfox <timemanager.rick@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

* new traffic chart style
- remove invoke
- force to set AxisY.Maximum not zero
- format LogForm.cs

* avoid data race

* add Traditional Chinese

* fix a resource type

* fix the Traditional Chinese name of "address", "port", "screen", "Open Location"

Caused by not call SocketAsyncEventArgs.Dispose().

Lock is evil.

This will actually affect the accuracy of GetDelta because
inboundDelta and outboundDelta may be calculated based on
the data collected at different time (eg. UpdateOutbound
get called before Interlocked.Read(ref _outbound)).

But that's not a problem. We can tolerate this little
inaccuracy. Besides, the _inbound, _outbound, _lastInbound
and _lastOutbound will be totally good because we use Interlocked.