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Libvirt provides a portable, long term stable C API for managing the virtualization technologies provided by many operating systems. It includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER Hypervisor.
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4b31da3478
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Laine Stump 4b31da3478 network: don't require private addresses if dnsmasq uses SO_BINDTODEVICE 
This is yet another refinement to the fix for CVE-2012-3411:

   https://bugzilla.redhat.com/show_bug.cgi?id=833033

It turns out that it would be very intrusive to correctly backport the
entire --bind-dynamic option to older dnsmasq versions
(e.g. dnsmasq-2.48 that is used on RHEL6.x and CentOS 6.x), but very
simple to patch those versions to just use SO_BINDTODEVICE on all
their listening sockets (SO_BINDTODEVICE also has the desired effect
of permitting only traffic that was received on the interface(s) where
dnsmasq was set to listen.)

This patch modifies the dnsmasq capabilities detection to detect the
string:

    --bind-interfaces with SO_BINDTODEVICE

in the output of "dnsmasq --version", and in that case realize that
using the old --bind-interfaces option is just as safe as
--bind-dynamic (and therefore *not* forbid creation of networks that
use public IP address ranges).

If -bind-dynamic is available, it is still preferred over
--bind-interfaces.

Note that this patch does no harm in upstream, or in any distro's
downstream if it happens to end up there, but builds for distros that
have a new enough dnsmasq to support --bind-dynamic do *NOT* need to
specifically backport this patch; it's only required for distro
releases that have dnsmasq too old to have --bind-dynamic (and those
distros will need to add the SO_BINDTODEVICE patch to dnsmasq,
*including the extra string in the --version output*, as well.
2012-12-17 15:51:19 -05:00
.gnulib@d245e6ddd6 maint: update to latest gnulib 2012-10-22 20:25:44 -06:00
build-aux Document bracket whitespace rules & add syntax-check rule 2012-11-02 14:00:32 +00:00
daemon daemon: Preface polkit error output with 'polkit:' 2012-12-17 13:37:53 -05:00
docs Add support for <hostdev mode="capabilities"> 2012-12-17 17:50:50 +00:00
examples examples: Fix balloon event callback 2012-12-11 13:25:50 +01:00
gnulib build: fix fresh checkout on RHEL5 2012-04-19 17:11:43 -06:00
include Add support for offline migration 2012-12-10 21:52:15 +01:00
m4 build: improve FORTIFY_SOURCE usage 2012-10-23 14:00:32 -06:00
po Add support for USB host device passthrough with LXC 2012-12-17 17:50:51 +00:00
python Fix the indention 2012-12-04 23:41:35 +08:00
src network: don't require private addresses if dnsmasq uses SO_BINDTODEVICE 2012-12-17 15:51:19 -05:00
tests Add support for <hostdev mode="capabilities"> 2012-12-17 17:50:50 +00:00
tools virsh: use vshReconnect for non-default connections too 2012-12-13 16:39:38 +01:00
.dir-locals.el build: avoid tabs that failed syntax-check 2012-09-06 09:43:46 -06:00
.gitignore .gitignore: add tests/sysinfotest 2012-12-17 14:40:48 -05:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap Autogenerate AUTHORS 2012-10-19 12:44:56 -04:00
AUTHORS.in Doug Goldstein gained commit capability 2012-11-15 09:34:01 +08:00
autobuild.sh Switch automated builds to use Mingw64 toolchain instead of Mingw32 2012-06-25 10:41:10 +01:00
autogen.sh build: fix incremental autogen.sh when no AUTHORS is present 2012-12-03 14:59:09 -07:00
bootstrap maint: regenerate bootstrap 2012-07-27 09:34:04 -06:00
bootstrap.conf Add ability to maintain disk leases indirectly 2012-12-13 15:26:57 +00:00
cfg.mk tests: Add tests for sysinfo 2012-12-17 17:37:17 +00:00
ChangeLog-old virterror.c: Fix several spelling mistakes 2012-02-03 11:32:51 -07:00
configure.ac build: Check for broken GCC -Wlogical-op in configure 2012-12-17 17:36:56 +00:00
COPYING.LIB remove all trailing blank lines 2009-07-16 15:06:42 +02:00
HACKING Document bracket whitespace rules & add syntax-check rule 2012-11-02 14:00:32 +00:00
libvirt.pc.in build: silence warning from autoconf 2012-05-30 09:22:02 -06:00
libvirt.spec.in spec: Include lockd files in libvirt-daemon package 2012-12-14 11:59:37 +01:00
Makefile.am build: Fix AUTHORS generation 2012-12-17 21:17:55 +01:00
Makefile.nonreentrant Ban use of all inet_* functions 2010-10-22 11:59:23 +01:00
mingw-libvirt.spec.in parallels: add driver skeleton 2012-08-01 11:44:26 +08:00
README Correct typos in the documentation (Atsushi SAKAI) 2008-01-24 10:15:13 +00:00
README-hacking maint: relax git minimum version 2010-02-24 14:29:27 -05:00
run.in Add a virtlockd client as a lock driver impl 2012-12-13 15:26:57 +00:00
TODO Update todo list file to point at bugzilla/website 2010-10-13 16:45:26 +01:00

README 

         LibVirt : simple API for virtualization

  Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.

Daniel Veillard <veillard@redhat.com>