libasyncns 0.3

libasyncns provides a C library for Linux/Unix for executing name service queries asynchronously. It is an asynchronous wrapper around getaddrinfo and getnameinfo from the libc.
In contrast to GNUs 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 libdenise, skadns, adns, libasyncns is just an asynchronous wrapper around the libcs synchronous getaddrinfo() API,
which has the adva ntage of allowing name resolution using techniques like 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.
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.
Enhancements:
- This version properly detects res_query() on Linux/AMD64 and supports older autoconf versions.