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author | roberto <roberto@FreeBSD.org> | 2004-07-20 15:01:56 +0000 |
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committer | roberto <roberto@FreeBSD.org> | 2004-07-20 15:01:56 +0000 |
commit | 118e757284cbb8fc4f43a713e892b41504b50a5f (patch) | |
tree | 528d12dda44ebdc3ffcc38050f159ac553a69c17 /contrib/ntp/arlib/README | |
parent | a85d9ae25e8e8696677bc30feb6eaf7fc150e529 (diff) | |
download | FreeBSD-src-118e757284cbb8fc4f43a713e892b41504b50a5f.zip FreeBSD-src-118e757284cbb8fc4f43a713e892b41504b50a5f.tar.gz |
Virgin import of ntpd 4.2.0
Diffstat (limited to 'contrib/ntp/arlib/README')
-rw-r--r-- | contrib/ntp/arlib/README | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/contrib/ntp/arlib/README b/contrib/ntp/arlib/README new file mode 100644 index 0000000..1d2e787 --- /dev/null +++ b/contrib/ntp/arlib/README @@ -0,0 +1,49 @@ + + Asynchronous DNS + ---------------- + + Intro. + +For those who write real time network applications that have to handle +multiple TCP or UDP connections, the problem of effectively doing DNS +lookups is quite real. Generally, this means the program waits while +the query finishes, holding everything else up. This small library of +routines aims to solve that problem by performing the DNS query and +then returning the program to its normal flow. + + Whats included ? + +The library routines, arlib.c, a header file for it, arlib.h, a man +page, arlib.3 and an example of how this sort of code is used, +sample.c. + + + Compilation & Installation. + +Edit the Makefile and do "make install" to install things where you +wish them to go. You should check it makes and works before doing +this :) + +If the compilation is successful, you'll have an executeable called +"example" and libares.a. "example" is a simple program which will +do hostname->IP# or IP#->hostnae lookups by entering either the +hostname or IP# on the line with "Host-->". You dont have to wait +for a query to fail or succeed before typing in the next line. + + Portability. + +I'm not sure how portable this is, it was written under SunOS 4.1.2 +on a Sparc 1+ and hasn't been tested very widely. If you find any +problems when compiling/execution, plase send me a patch (using +diff -c) to avalon@coombs.anu.edu.au. If it goes well enough, I'll +send it to comp.unix.sources or comp.sources.misc for further testing. + + Future additions. + +Adding a working cache would be nice but I'm not sure if that really +is needed (?). I guess it depends on how often your program is +required to do a DNS lookup and whether caching would help. + + +Cheers, +Darren. |