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Libvirt native C API and daemons
e14a5fcac4
These 3 functions are easier to understand, and more efficient, when the IPv4 address is viewed as a uint32 rather than an array of bytes. virsocketAddrGetIPv4Addr() has bothered me for a long time - it was doing ntohl of the address into a temporary uint32, and then a loop one-by-one swapping the order of all the bytes back to network order. Of course this only works as described on little-endian architectures - on big-endian architectures the first assignment won't swap the bytes' ordering, but the loop assumes the bytes are now in little-endian order and "swaps them back", so the result will be incorrect. (Do we not support any big-endian targets that would have exposed this bug long before now??) virSocketAddrCheckNetmask() was checking each byte of the two addresses individually, when it could instead just do the operation once on the full 32 bit values. virSocketGetRange() was checking for "range > 65535" by seeing if the first 2 bytes of the start and end were different, and then doing arithmetic combining the lower two bytes (along with necessary bit shifting to account for network byte order) to determine the exact size of the range. Instead we can just get the ntohl of start & end, and do the math directly. Signed-off-by: Laine Stump <laine@redhat.com> |
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==============================
Libvirt API for virtualization
==============================
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.
For some of these hypervisors, it provides a stateful management
daemon which runs on the virtualization host allowing access to the
API both by non-privileged local users and remote users.
Layered packages provide bindings of the libvirt C API into other
languages including Python, Perl, PHP, Go, Java, OCaml, as well as
mappings into object systems such as GObject, CIM and SNMP.
Further information about the libvirt project can be found on the
website:
https://libvirt.org
License
=======
The libvirt C API is distributed under the terms of GNU Lesser General
Public License, version 2.1 (or later). Some parts of the code that are
not part of the C library may have the more restrictive GNU General
Public License, version 2.0 (or later). See the files ``COPYING.LESSER``
and ``COPYING`` for full license terms & conditions.
Installation
============
Instructions on building and installing libvirt can be found on the website:
https://libvirt.org/compiling.html
Contributing
============
The libvirt project welcomes contributions in many ways. For most components
the best way to contribute is to send patches to the primary development
mailing list. Further guidance on this can be found on the website:
https://libvirt.org/contribute.html
Contact
=======
The libvirt project has two primary mailing lists:
* users@lists.libvirt.org (**for user discussions**)
* devel@lists.libvirt.org (**for development only**)
Further details on contacting the project are available on the website:
https://libvirt.org/contact.html