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Hans de Goede 89d2a68cb7 server/reds: Send the agent a CLIENT_DISCONNECTED msg on client disconnect
Client -> agent messages can spawn multiple VDIChunks. When this happens
the agent re-assembles the chunks into a complete VDAgentMessage before
processing it. The server only guarentees coherency at the chunk level,
so it is not possible for a partial chunk to get delivered to the agent.

But it is possible for some chunks of a VDAgentMessage to be delivered to
the agent followed by a client to disconnect without the rest of the
VDAgentMessage being delivered!

This will leave the agent in a wrong state, and the first messages send to it
by the next client to connect will get seen as the rest of the VDAgentMessage
from the previous client.

This patch sends the agent a new VD_AGENT_CLIENT_DISCONNECTED message from the
VDP_SERVER_PORT, on which the agent can then reset its VDP_CLIENT_PORT state.

Note that no capability check is done for this, since the capabilities are
something negotiated between client and agent. The server will simply always
send this message on client disconnect, relying on older agents discarding the
message since it has an unknown type (which both the windows and linux agents
already do).

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2013-03-07 11:52:23 +01:00
build-aux add git-version-gen and gitlog-to-changelog 2012-10-19 14:15:06 +02:00
client spice-client: Add --hotkeys cmdline option 2012-12-19 15:07:09 +01:00
docs docs/Spice_for_newbies.odt: some updates - added copy paste and wan mention, removed vdi_port 2012-01-22 15:13:32 +02:00
m4 m4/spice-compile-warnings: Squelch _FORTIFY_SOURCE when needed to avoid glibc #warnings. 2012-06-06 17:32:02 +03:00
server server/reds: Send the agent a CLIENT_DISCONNECTED msg on client disconnect 2013-03-07 11:52:23 +01:00
spice-common@063f4dd385 Update spice-common 2013-03-07 11:52:23 +01:00
tests tests/migrate.py: add --vdagent 2011-08-23 17:01:14 +03:00
tools Add casts for compatibility purposes 2012-02-14 10:44:49 +02:00
uncrustify_cfg fresh start 2009-10-14 15:06:41 +02:00
.gitignore add git-version-gen and gitlog-to-changelog 2012-10-19 14:15:06 +02:00
.gitmodules Use the spice-common submodule 2012-03-25 18:59:10 +02:00
.mailmap Add recent new committers to AUTHORS file / mailmap 2012-04-25 09:49:29 +01:00
AUTHORS Add recent new committers to AUTHORS file / mailmap 2012-04-25 09:49:29 +01:00
autogen.sh Use the spice-common submodule 2012-03-25 18:59:10 +02:00
cfg.mk Add a few more syntax-check exemptions 2012-04-25 09:49:32 +01:00
ChangeLog fresh start 2009-10-14 15:06:41 +02:00
configure.ac build: Use glib2 2012-12-12 18:15:48 +01:00
COPYING Relicense everything from GPL to LGPL 2.1+ 2010-04-13 22:22:15 +02:00
GITVERSION Add --enable-werror and make it the default only for git builds 2010-07-09 12:14:32 +02:00
GNUmakefile Add a 'syntax-check' make target 2012-01-13 18:12:00 +02:00
maint.mk Add a 'syntax-check' make target 2012-01-13 18:12:00 +02:00
Makefile.am add git-version-gen and gitlog-to-changelog 2012-10-19 14:15:06 +02:00
NEWS Release 0.12.2 2012-12-20 20:39:54 +01:00
README README: make a note of SPICE_DEBUG_ALLOW_MC 2012-02-15 14:32:11 +02:00
spice-server.pc.in spice-server.pc.in: move Requires to Requires.private 2011-10-23 11:26:30 +02:00
TODO.multiclient Remove trailing whitespace from end of lines 2012-01-13 18:11:59 +02:00

   SPICE: Simple Protocol for Independent Computing Environments
   =============================================================

SPICE is a remote display system built for virtual environments which
allows you to view a computing 'desktop' environment not only on the
machine where it is running, but from anywhere on the Internet and
from a wide variety of machine architectures.

Installation
------------

The SPICE package uses GNU autotools, so the build install process
follows the standard process documented in the INSTALL file. As a
quick start you can do

  ./configure --prefix=/usr --sysconfdir=/etc \
        --localstatedir=/var --libdir=/usr/lib
  make
  sudo make install

Or to install into a private user specific location

  ./configure --prefix=$HOME/spice
  make
  make install

The following mandatory dependancies are required in order to
build SPICE

    Spice protocol >= 0.9.0
    Celt           >= 0.5.1.1, < 0.6.0
    Pixman         >= 0.17.7
    OpenSSL
    libjpeg
    zlib
    Cyrus-SASL

The following optional dependancies increase the available
functionality

    GE Gui         >= 0.6.0,  < 0.7.0   (GUI app support)
    OpenGL                              (GUI app support)
    Alsa                                (Linux support)
    XRandR         >= 1.2               (X11 support)
    Xinerama       >= 1.0               (X11 support)
    libcacard      >= 0.1.2             (Smartcard support)
    Slirp                               (Tunnelling support)

Communication
-------------

To communicate with the development team, or to post patches
there is a technical mailing list:

   http://lists.freedesktop.org/mailman/listinfo/spice-devel

There is also a mailing list for new release announcements:

   http://lists.freedesktop.org/archives/spice-announce/

To view known bugs, or report new bugs, in SPICE visit

   https://bugs.freedesktop.org/describecomponents.cgi?product=Spice

Bugs found when using an OS distribution's binary packages should
be reported to the OS vendors' own bug tracker first.

The latest SPICE code can be found in GIT at:

   http://cgit.freedesktop.org/spice/

Licensing
---------

SPICE is provided under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

Please see the COPYING file for the complete LGPLv2+ license
terms, or visit <http://www.gnu.org/licenses/>.

Experimental Features
---------------------
To enable multiple client connections, set:
SPICE_DEBUG_ALLOW_MC=1

-- End of readme