libasyncns 0.8
Copyright 2005-2009 Lennart Poettering <mznflapaf (at) 0pointer (dot)
de>
* [1]License
* [2]News
* [3]Overview
* [4]Current Status
* [5]Documentation
* [6]Requirements
* [7]Installation
* [8]Acknowledgements
* [9]Download
License
This program is free software; you can redistribute it and/or modify it
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.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
General Public License for more details.
News
Thu 15 Oct 2009:
[10]Version 0.8 released; changes include: various smaller fixes.
Tue 28 Oct 2008:
[11]Version 0.7 released; changes include: rework thread shutdown
logic.
Fri 24 Oct 2008:
[12]Version 0.6 released; changes include: save and restore h_errno in
addition to errno; drop usage of pthread's cancelling since it is
problematic on some platforms.
Sun 17 Aug 2008:
[13]Version 0.5 released; changes include: fix getaddrinfo()
serialization.
Sun 27 Jul 2008:
[14]Version 0.4 released; changes include: rework error handling logic,
add asyncns_freeanswer(), a lot of fixes
Wed 23 May 2007:
[15]Version 0.3 released; changes include: build fixes: properly detect
res_query() on Linux/AMD64, support older autoconf versions
Fri 16 Feb 2007:
[16]Version 0.2 released; changes include: res_query() support; minor
bug fixes; doc updates
Sat 8 Jan 2005:
[17]Version 0.1 released
Overview
libasyncns is a C library for Linux/Unix for executing name service
queries asynchronously. It is an asynchronous wrapper around
getaddrinfo(3), getnameinfo(3), res_query(3) and res_search(3) from
libc and libresolv.
In contrast to GNU's asynchronous name resolving API getaddrinfo_a(),
libasyncns does not make use of UNIX signals for reporting completion
of name queries. Instead, the API exports a standard UNIX file
descriptor which may be integerated cleanly into custom main loops.
In contrast to asynchronous DNS resolving libraries like [18]libdenise,
[19]skadns, [20]adns, libasyncns is just an asynchronous wrapper around
the libc's synchronous getaddrinfo() API, which has the advantage of
allowing name resolution using techniques like [21]Multicast DNS, LDAP
or NIS using standard libc NSS (Name Service Switch) modules.
libasyncns is compatible with IPv6 if the underlying libc is.
libasyncns is very tiny, consisting of just one header and one source
file. It has no dependencies besides libc.
By default libasyncns spawns a number of worker threads (LWPs) to
process name queries. Alternatively or when POSIX Threads are not
supported, libasyncns can fork() off worker processes instead.
Current Status
Version 0.8 is quite stable and feature complete.
Damien Thébault has written a Python module [22]libasyncns-python that
wraps the libasyncns C API.
Documentation
You may browse the [23]Doxygen generated [24]programing documentation
the API. (Run make doxygen to generate this documentation from the
source tree)
Requirements
Currently, libasyncns is tested on Linux and Solaris
(sparc-sun-solaris2.8) only.
libasyncns was developed and tested on Debian GNU/Linux "testing" from
January 2005, it should work on most other Linux distributions (and
maybe Unix versions) since it uses GNU autoconf and GNU libtool for
source code configuration and shared library management.
libasyncns has no dependencies besides a libc that supports
getaddrinfo() and res_query().
Installation
As this package is made with the GNU autotools you should run
./configure inside the distribution directory for configuring the
source tree. After that you should run make for compilation and make
install (as root) for installation of libasyncns.
Acknowledgements
Sjoerd Simons for the res_query() support.
Download
The newest release is always available from
[25]http://0pointer.de/lennart/projects/libasyncns/
The current release is [26]0.8
Get libasyncns's development sources from the [27]GIT [28]repository
([29]gitweb):
git clone git://git.0pointer.de/libasyncns
You may find an up to date Debian package of libasyncns on the
[30]Debian package repository.
If you want to be notified whenever I release a new version of this
software use the subscription feature of [31]Freshmeat.
__________________________________________________________________
Lennart Poettering <mznflapaf (at) 0pointer (dot) de>, October 2009
References
1. README#license
2. README#news
3. README#overview
4. README#status
5. README#documentation
6. README#requirements
7. README#installation
8. README#acks
9. README#download
10. http://0pointer.de/lennart/projects/libasyncns/libasyncns-0.8.tar.gz
11. http://0pointer.de/lennart/projects/libasyncns/libasyncns-0.7.tar.gz
12. http://0pointer.de/lennart/projects/libasyncns/libasyncns-0.6.tar.gz
13. http://0pointer.de/lennart/projects/libasyncns/libasyncns-0.5.tar.gz
14. http://0pointer.de/lennart/projects/libasyncns/libasyncns-0.4.tar.gz
15. http://0pointer.de/lennart/projects/libasyncns/libasyncns-0.3.tar.gz
16. http://0pointer.de/lennart/projects/libasyncns/libasyncns-0.2.tar.gz
17. http://0pointer.de/lennart/projects/libasyncns/libasyncns-0.1.tar.gz
18. http://libdenise.sourceforge.net/
19. http://www.skarnet.org/software/skadns/
20. http://www.chiark.greenend.org.uk/~ian/adns/
21. http://0pointer.de/lennart/projects/nss-mdns/
22. https://launchpad.net/libasyncns-python
23. http://www.doxygen.org/
24. http://0pointer.de/lennart/projects/libasyncns/doxygen/
25. http://0pointer.de/lennart/projects/libasyncns/
26. http://0pointer.de/lennart/projects/libasyncns/libasyncns-0.8.tar.gz
27. http://git.or.cz/
28. git://git.0pointer.de/libasyncns
29. http://git.0pointer.de/?p=libasyncns.git
30. http://packages.debian.org/libasyncns0
31. http://freshmeat.net/projects/libasyncns/