Adds automagically generating libvncserver/libvncclient API
    documentation using doxygen. This gives a nice overview on both APIs,
    include dependencies and function call/caller dependencies.

    TODO: Modify all the explaining comments in the .c files for use with
          doxygen as well.

    This patch only changes comments, no functional changes at all!
Signed-off-by: Christian Beier <dontmind@freeshell.org>

This implements the xvp VNC extension, which is described in the
community version of the RFB protocol:
http://tigervnc.sourceforge.net/cgi-bin/rfbproto
It is also mentioned in the official RFB protocol.

Redefining strncasecmp to _strnicmp makes libvncclient hang forever in
SetFormatAndEncodings() on Windows when built with MinGW64.

Reported by Tobias Doerffel <tobias.doerffel@gmail.com>, thanks!

Some (all?) autotool versions do not properly prefix
WORDS_BIGENDIAN with LIBVNCSERVER_, so do that manually
here.

Thanks to Lorenz Kolb for reporting.

This enables setting the DSCP/Traffic Class field of IP/IPv6 packets
sent by a client. For example starting a client with -qosdscp 184
marks all outgoing traffic for expedited forwarding.

Implementation for Win32 is still a TODO, though. See
http://betelco.blogspot.com/2009/03/dscp-marking-under-windows-at.html
for an overview of the Win32 QoS API mess...

Expands the SetNonBlocking() function in libvncclient/sockets.c to also
work under Windows and also changes it to honour maybe already present
socket flags.

A similar function was introduced for libvncserver as well and
all the #ifdef'ed fnctl calls replaced with calls to that one.
Signed-off-by: Christian Beier <dontmind@freeshell.org>

[jes: pulled the "host" declarations into the conditionally compiled
blocks where that variable is used. Also fixed non-IPv6 connections.]
Signed-off-by: Vic Lee <llyzs@163.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

If set, this hook gets called just before
rfbSendFrameBufferUpdate() returns.
Signed-off-by: Christian Beier <dontmind@freeshell.org>

- It's SDL_LIBRARY, not SDL_LIBRARIES
- Detect GnuTLS and set the macro in rfbconfig.h
- Add tls.c to libvncclient to avoid missing symbols
Signed-off-by: Corentin Chary <corentin.chary@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

[jes: adjusted coding style, made sure port is initialized correctly]
Signed-off-by: Vic Lee <llyzs@163.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Signed-off-by: Vic Lee <llyzs@163.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

The return value now better reflects what has happened:
1 on success (incoming connection on listen socket, we
accepted it successfully), -1 on error, 0 on timeout.

Also change the select calls to not check _all_ possible
file descriptors.
Signed-off-by: Christian Beier <dontmind@freeshell.org>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Signed-off-by: Vic Lee <llyzs@163.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Forking the whole process from deep within a library call does
not really work at all with apps that use multiple threads, i.e. every
reasonably modern GUI app. So, provide a non-forking listen function so
that the caller can decide if to fork, start a thread, etc.

This implementation adds a timeout parameter to be able to call the
listen function multiple times so that it's possible to do sth. else
in between, e.g. abort listening.
Signed-off-by: Christian Beier <dontmind@freeshell.org>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

When working on a program which searches the display for some image, one
does not want to search again without getting an FB update.  Add a
callback to make this possible.

Signed-off-by: Vic Lee <llyzs@163.com>

SOCKET is redefined in winsock2.h so #undef it where winsock2.h
is included. The changes in rfbproto.c circumvent crosscompiler
errors like 'S_IFMT' undeclared ...', the Makefile.am changes
avoid building linux specific stuff for a win32 host target.
Also added configure option to specify sdl-config.
Signed-off-by: Christian Beier <dontmind@freeshell.org>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Signed-off-by: Vic Lee <llyzs@163.com>

Proposed tight security type fix for debian bug 517422.

These are useful functions for VNC clients, so let's export them for
everybody to use.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

The JPEG library is not necessarily installed everywhere, and sometimes
it is outright undesirable to compile with JPEG support, e.g. when the
server is not very fast.  So fix the compilation for that case.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

The variable tightQualityLevel is used for ZYWRLE compression, too,
so if libjpeg is not present, but libz is, we still need to have
that struct member.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

ZYWRLE used a static buffer, which does not work too well if you have
more than one client in a threaded server.  Instead, we have the data
in the client structure now.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

This buglet made it impossible to double include rfb.h from C++.

LibVNCClient: some users do not want to get whole-screen updates; introduce client->updateRect for that

rfbEncodingSupportedEncodings - What encodings are supported?
rfbEncodingSupportedMessages  - What message types are supported?
rfbEncodingServerIdentity     - What is the servers version string?
ie: "x11vnc: 0.8.1 lastmod: 2006-04-25 (LibVNCServer 0.9pre)"