head 1.1; branch 1.1.1; access; symbols adns_1_0:1.1.1.4 adns_0_9:1.1.1.3 adns_0_8:1.1.1.3 adns_0_7:1.1.1.2 adns_0_6:1.1.1.1 vendor:1.1.1; locks; strict; comment @# @; 1.1 date 99.11.30.15.42.25; author rse; state Exp; branches 1.1.1.1; next ; 1.1.1.1 date 99.11.30.15.42.25; author rse; state Exp; branches; next 1.1.1.2; 1.1.1.2 date 2000.03.02.09.34.03; author rse; state Exp; branches; next 1.1.1.3; 1.1.1.3 date 2000.05.08.14.05.32; author rse; state Exp; branches; next 1.1.1.4; 1.1.1.4 date 2000.09.19.15.46.52; author rse; state Exp; branches; next ; desc @@ 1.1 log @Initial revision @ text @ GNU adns Advanced, easy to use, asynchronous-capable DNS client library. adns is a resolver library for C (and C++) programs. In contrast with the existing interfaces, gethostbyname et al and libresolv, it has the following features: * It is reasonably easy to use for simple programs which just want to translate names to addresses, look up MX records, etc. * It can be used in an asynchronous, non-blocking, manner. Many queries can be handled simultaneously. * Responses are decoded automatically into a natural representation for a C program - there is no need to deal with DNS packet formats. * Sanity checking (eg, name syntax checking, reverse/forward correspondence, CNAME pointing to CNAME) is performed automatically. * Time-to-live, CNAME and other similar information is returned in an easy-to-use form, without getting in the way. * There is no global state in the library; resolver state is an opaque data structure which the client creates explicitly. A program can have several instances of the resolver. * Errors are reported to the application in a way that distinguishes the various causes of failure properly. * Understands conventional resolv.conf, but this can overridden by environment variables. * Flexibility. For example, the application can tell adns to: ignore environment variables (for setuid programs), disable sanity checks eg to return arbitrary data, override or ignore resolv.conf in favour of supplied configuration, etc. * Believed to be correct ! For example, will correctly back off to TCP in case of long replies or queries, or to other nameservers if several are available. It has sensible handling of bad responses etc. Forthcoming: I hope that future versions may also have the following features: * The library should be useable by threads in a multithreaded program in a natural way. It should multiplex many threads' queries through a single query socket. * IPv6 support. * Some kind of awareness of DNSSEC. * Possibly some very limited caching behaviour. (Technical note: adns requires a real nameserver like [1]BIND or [2]Dents running on the same system or a nearby one, which must be willing to provide `recursive service'. I.e., adns is a `stub resolver'. All properly configured UN*X and GNU systems will already have such nameserver(s); they are usually listed in /etc/resolv.conf.) Documentation I'm afraid there is no manual yet. However, competent C programmers should be able to use the library based on the commented [3]adns.h header file (from version 0.4). Feedback I'd be pleased if you would let me know if you're using my library in your project, and what you think of it. If you are subscribed to adns-discuss please send feedback, including bug reports, there; otherwise send mail to adns-bugreports@@chiark.greenend.org.uk. If you'd prefer that your message wasn't forwarded to the adns-bugreports list, send it to adns-maint@@chiark.greendend.org.uk. Mailinglists I have set up mailinglists adns-announce and adns-discuss. The announcements list is moderated and will contain only announcements of important bugs, new versions, &c. The bug reports address mentioned above is also a mailing list; feel free to subscribe to it. There are [4]archives and subscription web pages, or you can subscribe by sending mail containing the word `subscribe' to adns-announce-REQUEST@@chiark.greenend.org.uk or adns-discuss-REQUEST@@chiark.greenend.org.uk. Download Available for download from [5]chiark.greenend.org.uk are: * The [6]current pre-release version as a gzipped tarfile. * [7]adns.h API header file with comments (currently there is no manual, sorry). * All versions released so far are also available via [8]anonymous FTP. * A mirror of my CVS repository is available via rsync from rsync.chiark.greenend.org.uk::ftp/users/ian/cvs-pub/adns (use FTP first to find your way around). adns is also available from the [9]GNU Project FTP servers and their [10]mirrors. Copyright and licensing adns is Copyright 1997-1999 Ian Jackson. adns is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program and documentation 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 [11]GNU General Public License for more details. You should have received a copy of the GNU General Public License along with adns, or one should be available above; if not, write to the [12]Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA, or email adns-maint@@chiark.greenend.org.uk. _________________________________________________________________ [13]Ian Jackson / [14]adns-maint@@chiark.greenend.org.uk; more [15]free software by me. [16]GNU home page; [17]chiark home page; [18]site or mirror home page This web page is Copyright (C)1996-1999 Ian Jackson. See the [19]Copyright/acknowledgements. Use any browser - [20]Campaign for a non-browser-specific WWW References 1. http://www.isc.org/view.cgi?/products/BIND/index.phtml 2. http://www.dents.org/ 3. http://www.chiark.greenend.org.uk/~ian/adns/adns.h.0.4.txt 4. http://www.chiark.greenend.org.uk/mailman/listinfo 5. http://www.chiark.greenend.org.uk/~ian/adns/ 6. http://www.chiark.greenend.org.uk/~ian/adns/adns.tar.gz 7. http://www.chiark.greenend.org.uk/~ian/adns/adns.h.0.5.txt 8. ftp://ftp.chiark.greenend.org.uk/users/ian/adns/ 9. http://www.gnu.org/ 10. http://www.gnu.org/order/ftp.html 11. http://www.chiark.greenend.org.uk/~ian/COPYING.txt 12. http://www.fsf.org/ 13. http://www.chiark.greenend.org.uk/ 14. mailto:adns-maint@@chiark.greenend.org.uk 15. http://www.chiark.greenend.org.uk/~ian/software/ 16. http://www.gnu.org/ 17. http://www.chiark.greenend.org.uk/ 18. http://www.chiark.greenend.org.uk/ 19. http://www.chiark.greenend.org.uk/~ian/sw-www-copy.html 20. http://www.anybrowser.org/campaign/ @ 1.1.1.1 log @Import of adns 0.6; adjusted for OSSP @ text @@ 1.1.1.2 log @Import of ADNS 0.7 @ text @d4 1 a4 2 Advanced, easy to use, asynchronous-capable DNS client library and utilities. a36 13 adns also comes with a number of utility programs for use from the command line and in scripts: * adnslogres is a much faster version of Apache's logresolv program. * adnsresfilter is a filter which copies its input to its output, replacing IP addresses by the corresponding names, without unduly delaying the output. For example, you can usefully pipe the output of netstat -n, tcpdump -ln, and the like, into it. * adnshost is a general-purpose DNS lookup utility which can be used easily in shell scripts to do simple lookups. In a more advanced mode it can be used as a general-purpose DNS helper program for scripting languages which can invoke and communicate with subprocesses. a38 2 A native Perl interface is in the works, thanks to Tony Finch. d56 2 a57 2 should be able to use the library based on the [3]commented adns.h header file. d85 1 a85 1 * The [6]current beta version as a gzipped tarfile. d92 1 a92 1 first to find your way around), or via [9]cvsweb. d94 2 a95 2 adns is also available from the [10]GNU Project FTP servers and their [11]mirrors. d99 1 a99 1 adns is Copyright 1997-1999 Ian Jackson and Copyright 1999 Tony Finch. d109 1 a109 1 [12]GNU General Public License for more details. d113 1 a113 1 the [13]Free Software Foundation, 59 Temple Place - Suite 330, Boston, d117 1 a117 1 [14]Ian Jackson / [15]adns-maint@@chiark.greenend.org.uk; more [16]free d120 1 a120 1 [17]GNU home page; [18]chiark home page; [19]site or mirror home page d123 1 a123 1 [20]Copyright/acknowledgements. d125 1 a125 1 Use any browser - [21]Campaign for a non-browser-specific WWW d131 1 a131 1 3. http://www.chiark.greenend.org.uk/~ian/adns/adns.h.txt d135 1 a135 1 7. http://www.chiark.greenend.org.uk/~ian/adns/adns.h.txt d137 9 a145 9 9. http://www.chiark.greenend.org.uk/ucgi/~ijackson/cvsweb/adns/ 10. http://www.gnu.org/ 11. http://www.gnu.org/order/ftp.html 12. http://www.chiark.greenend.org.uk/~ian/COPYING.txt 13. http://www.fsf.org/ 14. http://www.chiark.greenend.org.uk/ 15. mailto:adns-maint@@chiark.greenend.org.uk 16. http://www.chiark.greenend.org.uk/~ian/software/ 17. http://www.gnu.org/ d147 2 a148 3 19. http://www.chiark.greenend.org.uk/ 20. http://www.chiark.greenend.org.uk/~ian/sw-www-copy.html 21. http://www.anybrowser.org/campaign/ @ 1.1.1.3 log @Import of ADNS 0.8 @ text @d115 1 a115 2 adns is Copyright 1997-2000 Ian Jackson, Copyright 1999 Tony Finch, and Copyright (C) 1991 Massachusetts Institute of Technology. d138 1 a138 1 This web page is Copyright (C)1996-2000 Ian Jackson. See the @ 1.1.1.4 log @Import of ADNS 1.0 @ text @d7 3 a9 7 adns is a resolver library for C (and C++) programs, and a collection of useful DNS resolver utilities. C library In contrast with the standard interfaces, gethostbyname et al and libresolv, it has the following features: d30 3 a32 3 environment variables (for setuid programs), disable hostname syntax sanity checks to return arbitrary data, override or ignore resolv.conf in favour of supplied configuration, etc. a37 2 DNS utility programs d46 4 a49 5 easily in from the command line and from shell scripts to do simple lookups. In a more advanced mode it can be used as a general-purpose DNS helper program for scripting languages which can invoke and communicate with subprocesses. See the [1]adnshost usage message for a summary of its capabilities. d51 18 d72 2 a73 3 should be able to use the library based on the [2]commented adns.h header file, and the usage messages for the programs should be sufficient. d84 1 a84 1 adns-maint@@chiark.greenend.org.uk. d90 1 a90 1 important bugs, new versions, etc. The bug reports address mentioned d93 1 a93 1 There are [3]archives and subscription web pages, or you can subscribe d100 4 a103 4 Available for download from [4]chiark.greenend.org.uk are: * The [5]current release as a gzipped tarfile. * [6]adns.h API header file with comments, and [7]usage message for adnshost (currently there is no manual, sorry). d105 1 a105 1 FTP and [9]HTTP, d108 1 a108 1 first to find your way around), or via [10]cvsweb. d110 2 a111 10 adns is also available from the [11]GNU Project FTP servers and their [12]mirrors. Technical note adns requires a real nameserver like [13]BIND or [14]Dents running on the same system or a nearby one, which must be willing to provide `recursive service'. I.e., adns is a `stub resolver'. All properly configured UN*X and GNU systems will already have such nameserver(s); they are usually listed in /etc/resolv.conf. d115 2 a116 2 adns is Copyright 1997-2000 Ian Jackson, Copyright 1999-2000 Tony Finch, and Copyright (C) 1991 Massachusetts Institute of Technology. d126 1 a126 1 [15]GNU General Public License for more details. d130 1 a130 1 the [16]Free Software Foundation, 59 Temple Place - Suite 330, Boston, d134 1 a134 1 [17]Ian Jackson / [18]adns-maint@@chiark.greenend.org.uk; more [19]free d137 1 a137 1 [20]GNU home page; [21]chiark home page; [22]site or mirror home page d140 1 a140 1 [23]Copyright/acknowledgements. d142 1 a142 1 Use any browser - [24]Campaign for a non-browser-specific WWW d146 7 a152 7 1. http://www.chiark.greenend.org.uk/~ian/adns/adnshost.txt 2. http://www.chiark.greenend.org.uk/~ian/adns/adns.h.txt 3. http://www.chiark.greenend.org.uk/mailman/listinfo 4. http://www.chiark.greenend.org.uk/~ian/adns/ 5. http://www.chiark.greenend.org.uk/~ian/adns/adns.tar.gz 6. http://www.chiark.greenend.org.uk/~ian/adns/adns.h.txt 7. http://www.chiark.greenend.org.uk/~ian/adns/adnshost.txt d154 13 a166 16 9. http://www.chiark.greenend.org.uk/~ian/adns/ftp/ 10. http://www.chiark.greenend.org.uk/ucgi/~ijackson/cvsweb/adns/ 11. http://www.gnu.org/ 12. http://www.gnu.org/order/ftp.html 13. http://www.isc.org/view.cgi?/products/BIND/index.phtml 14. http://www.dents.org/ 15. http://www.chiark.greenend.org.uk/~ian/COPYING.txt 16. http://www.fsf.org/ 17. http://www.chiark.greenend.org.uk/ 18. mailto:adns-maint@@chiark.greenend.org.uk 19. http://www.chiark.greenend.org.uk/~ian/software/ 20. http://www.gnu.org/ 21. http://www.chiark.greenend.org.uk/ 22. file://localhost/ 23. http://www.chiark.greenend.org.uk/~ian/sw-www-copy.html 24. http://www.anybrowser.org/campaign/ @