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Changelog for the c-ares project
* February 19
- Vlad Dinulescu added ares_parse_ns_reply().
* February 13
- Yang Tse: Fix failure to get the search sequence of /etc/hosts and
DNS from /etc/nsswitch.conf, /etc/host.conf or /etc/svc.conf when
/etc/resolv.conf did not exist or was unable to read it.
* November 22
- Install ares_dns.h too
- Michael Wallner fixed this problem: When I set domains in the options
struct, and there are domain/search entries in /etc/resolv.conf, the domains
of the options struct will be overridden.
* November 6
- Yang Tse removed a couple of potential zero size memory allocations.
- Andreas Rieke fixed the line endings in the areslib.dsp file that I (Daniel)
broke in the 1.3.2 release. We should switch to a system where that file is
auto-generated. We could rip some code for that from curl...
Version 1.3.2 (November 3, 2006)
* October 12 2006
- Prevent ares_getsock() to overflow if more than 16 sockets are used.
* September 11 2006
- Guilherme Balena Versiani: I noted a strange BUG in Win32 port
(ares_init.c/get_iphlpapi_dns_info() function): when I disable the network
by hand or disconnect the network cable in Windows 2000 or Windows XP, my
application gets as the only name server. The problem comes from
'GetNetworkParams' function, that returns the empty string "" as the only
name server in that case. Moreover, the Windows implementation of
inet_addr() returns INADDR_LOOPBACK instead of INADDR_NONE.
* August 29 2006
- Brad Spencer did
o made ares_version.h use extern "C" for c++ compilers
o fixed compiler warnings in ares_getnameinfo.c
o fixed a buffer position init for TCP reads
* August 3 2006
- Ravi Pratap fixed ares_getsock() to actually return the proper bitmap and
not always zero!
Version 1.3.1 (June 24, 2006)
* July 23, 2006
- Gisle Vanem added getopt() to the ahost program. Currently accepts
only [-t {a|aaaa}] to specify address family in ares_gethostbyname().
* June 19, 2006
- (wahern) Removed "big endian" DNS section and RR data integer parser
macros from ares_dns.h, which break c-ares on my Sparc64. Bit-wise
operations in C operate on logical values. And in any event the octets are
already in big-endian (aka network) byte order so they're being reversed
(thus the source of the breakage).
* June 18, 2006
- William Ahern handles EAGAIN/EWOULDBLOCK errors in most of the I/O calls
from area_process.c.
TODO: Handle one last EAGAIN for a UDP socket send(2) in
* May 10, 2006
- Bram Matthys brought my attention to a libtool peculiarity where detecting
things such as C++ compiler actually is a bad thing and since we don't need
that detection I added a work-around, much inspired by a previous patch by
Paolo Bonzini. This also shortens the configure script quite a lot.
* May 3, 2006
- Nick Mathewson added the ARES_OPT_SOCK_STATE_CB option that when set makes
c-ares call a callback on socket state changes. A better way than the
ares_getsock() to get full control over the socket state.
* January 9, 2006
- Alexander Lazic improved the getservbyport_r() configure check.
* January 6, 2006
- Alexander Lazic pointed out that the buildconf should use the ACLOCAL_FLAGS
variable for easier controlling what it does and how it runs.
* January 5, 2006
- James Bursa fixed c-ares to find the hosts file on RISC OS, and made it
build with newer gcc versions that no longer defines "riscos".
* December 22
- Daniel Stenberg added ares_getsock() that extracts the set of sockets to
wait for action on. Similar to ares_fds() but not restricted to using
select() for the waiting.
* November 25
- Yang Tse fixed some send() / recv() compiler warnings
* September 18
- Added constants that will be used by ares_getaddrinfo
- Made ares_getnameinfo use the reentrant getservbyport (getservbyport_r) if it
is available to ensure it works properly in a threaded environment.
* September 10
- configure fix for detecting a member in the sockaddr_in6 struct which failed
on ipv6-enabled HP-UX 11.00
Version 1.3.0 (August 29, 2005)
* August 21
- Alfredo Tupone provided a fix for the Windows code in get_iphlpapi_dns_info()
when getting the DNS server etc.
* June 19
- Added some checks for the addrinfo structure.
* June 2
- William Ahern:
Make UDP sockets non-blocking. I've confirmed that at least on Linux 2.4 a
read event can come back from poll() on a valid SOCK_DGRAM socket but
recv(2) will still block. This patch doesn't ignore EAGAIN in
read_udp_packets(), though maybe it should. (This patch was edited by Daniel
Stenberg and a new configure test was added (imported from curl's configure)
to properly detect what non-blocking socket approach to use.)
I'm not quite sure how this was happening, but I've been seeing PTR queries
which seem to return empty responses. At least, they were empty when calling
ares_expand_name() on the record. Here's a patch which guarantees to
NUL-terminate the expanded name. The old behavior failed to NUL-terminate if
len was 0, and this was causing strlen() to run past the end of the buffer
after calling ares_expand_name() and getting ARES_SUCCESS as the return
value. If q is not greater than *s then it's equal and *s is always
allocated with at least one byte.
* May 16
- Added ares_getnameinfo which mimics the getnameinfo API (another feature
that could use testing).
* May 14
- Added an inet_ntop function from BIND for systems that do not have it.
* April 9
- Made sortlist support IPv6 (this can probably use some testing).
- Made sortlist support CIDR matching for IPv4.
* April 8
- Added preliminary IPv6 support to ares_gethostbyname. Currently, sortlist
does not work with IPv6. Also provided an implementation of bitncmp from
BIND for systems that do not supply this function. This will be used to add
IPv6 support to sortlist.
- Made ares_gethostbyaddr support IPv6 by specifying AF_INET6 as the family.
The function can lookup IPv6 addresses both from files (/etc/hosts) and
DNS lookups.
* April 7
- Tupone Alfredo fixed includes of arpa/nameser_compat.h to build fine on Mac
* April 5
- Dominick Meglio: Provided implementations of inet_net_pton and inet_pton
from BIND for systems that do not include these functions.
* March 11, 2005
- Dominick Meglio added ares_parse_aaaa_reply.c and did various
adjustments. The first little steps towards IPv6 support!
* November 7
- Fixed the VC project and makefile to use ares_cancel and ares_version
* October 24
- The released ares_version.h from 1.2.1 says 1.2.0 due to a maketgz flaw.
This is now fixed.
Version 1.2.1 (October 20, 2004)
* September 29
- Henrik Stoerner fix: got a report that Tru64 Unix (the unix from Digital
when they made Alpha's) uses /etc/svc.conf for the purpose fixed below for
other OSes. He made c-ares check for and understand it if present.
- Now c-ares will use local host name lookup _before_ DNS resolving by default
if nothing else is told.
* September 26
- Henrik Stoerner: found out that c-ares does not look at the /etc/host.conf
file to determine the sequence in which to search /etc/hosts and DNS. So on
systems where this order is defined by /etc/host.conf instead of a "lookup"
entry in /etc/resolv.conf, c-ares will always default to looking in DNS
first, and /etc/hosts second.
c-ares now looks at
1) resolv.conf (for the "lookup" line);
2) nsswitch.fon (for the "hosts:" line);
3) host.conf (for the "order" line).
First match wins.
- Dominick Meglio patched: C-ares on Windows assumed that the HOSTS file is
located in a static location. It assumed
C:\Windows\System32\Drivers\Etc. This is a poor assumption to make. In fact,
the location of the HOSTS file can be changed via a registry setting.
There is a key called DatabasePath which specifies the path to the HOSTS
The patch will make c-ares correctly consult the registry for the location
of this file.
* August 29
- Gisle Vanem fixed the MSVC build files.
* August 20
- Gisle Vanem made c-ares build and work with his Watt-32 TCP/IP stack.
* August 13
- Harshal Pradhan made a minor syntax change in ares_init.c to make it build
fine with MSVC 7.1
* July 24
- Made the lib get built static only if --enable-debug is used.
- Gisle Vanem fixed:
Basically in loops like handle_errors(), 'query->next' was assigned a local
variable and then query was referenced after the memory was freed by
next_server(). I've changed that so next_server() and end_query() returns
the next query. So callers should use this ret-value.
The next problem was that 'server->tcp_buffer_pos' had a random value at
entry to 1st recv() (luckily causing Winsock to return ENOBUFS).
I've also added a ares_writev() for Windows to streamline the code a bit
* July 20
- Fixed a few variable return types for some system calls. Made configure
check for ssize_t to make it possible to use that when receiving the send()
error code. This is necessary to prevent compiler warnings on some systems.
- Made configure create config.h, and all source files now include setup.h that
might include the proper config.h (or a handicrafted alternative).
- Switched to 'ares_socket_t' type for sockets in ares, since Windows don't
use 'int' for that.
- automake-ified and libool-ified c-ares. Now it builds libcares as a shared
lib on most platforms if wanted. (This bloated the size of the release
archive with another 200K!)
- now uses for the c sources, h headers and man
pages, to make it easier for other makefiles to use the exact same set of
- Adjusted 'maketgz' to use the new automake magic when building distribution
- Anyone desires HTML and/or PDF versions of the man pages in the release
* July 3
- Günter Knauf made c-ares build and run on Novell Netware.
* July 1
- Gisle Vanem provided to build with djgpp, added a few more djgpp
fixes and made ares not use 'errno' to provide further info on Windows.
* June 30
- Gisle Vanem made it build with djgpp and run fine with the Watt-32 stack.
* June 10
- Gisle Vanem's init patch for Windows:
The init_by_resolv_conf() function fetches the DNS-server(s)
from a series of registry branches.
This can be wrong in the case where DHCP has assigned nameservers, but the
user has overridden these servers with other prefered settings. Then it's
wrong to use the DHCPNAMESERVER setting in registry.
In the case of no global DHCP-assigned or fixed servers, but DNS server(s)
per adapter, one has to query the adapter branches. But how can c-ares know
which adapter is valid for use? AFAICS it can't. There could be one adapter
that is down (e.g. a VPN adapter).
So it's better to leave this to the IP Helper API (iphlapi) available in
Win-98/2000 and later. My patch falls-back to the old way if not available.
* June 8
- James Bursa fixed an init issue for RISC OS.
* May 11
- Nico Stappenbelt reported that when processing domain and search lines in
the resolv.conf file, the first entry encountered is processed and used as
the search list. According to the manual pages for both Linux, Solaris and
Tru64, the last entry of either a domain or a search field is used.
This is now adjusted in the code
Version 1.2.0 (April 13, 2004)
* April 2, 2004
- Updated various man pages to look nicer when converted to HTML on the web
* April 1, 2004
- Dirk Manske provided a new function that is now named ares_cancel(). It is
used to cancel/cleanup a resolve/request made using ares functions on the
given ares channel. It does not destroy/kill the ares channel itself.
- Dominick Meglio cleaned up the formatting in several man pages.
* March 30, 2004
- Dominick Meglio's new ares_expand_string. A helper function when decoding
incoming DNS packages.
- Daniel Stenberg modified the to use a for loop for the man page
installation to improve overview and make it easier to add man pages.
Version 1.1.0 (March 11, 2004)
* March 9, 2004
- Gisle Vanem improved build on Windows.
* February 25, 2004
- Dan Fandrich found a flaw in the Feb 22 fix.
- Added better configure --enable-debug logic (taken from the curl configure
script). Added acinclude.m4 to the tarball.
* February 23, 2004
- Removed ares_free_errmem(), the function, the file and the man page. It was
not used and it did nothing.
- Fixed a lot of code that wasn't "64bit clean" and thus caused a lot of
compiler warnings on picky compilers.
* February 22, 2004
- Dominick Meglio made ares init support multiple name servers in the
NameServer key on Windows.
* February 16, 2004
- Modified ares_private.h to include libcurl's memory debug header if
CURLDEBUG is set. This makes all the ares-functions supervised properly by
the curl test suite. This also forced me to add inclusion of the
ares_private.h header in a few more files that are using some kind of
memory-related resources.
- Made the makefile only build ahost and adig if 'make demos' is used.
* February 10, 2004
- Dirk Manske made ares_version.h installed with 'make install'
* February 4, 2004
- ares_free_errmem() is subject for removal, it is simply present for future
purposes, and since we removed the extra parameter in strerror() it won't
be used by c-ares!
- configure --enable-debug now enables picky compiler options if gcc is used
- fixed several compiler warnings --enable-debug showed and Joerg Mueller-Tolk
Version 1.0.0 (February 3, 2004)
* February 3, 2004
- now we produce the libcares.a library instead of the previous libares.a
since we are no longer compatible
* February 2, 2004
- ares_strerror() has one argument less. This is the first official
modification of the existing provided ares API.
* January 29, 2004
- Dirk Manske fixed how the socket is set non-blocking.
* January 4, 2004
- Dominick Meglio made the private gettimeofday() become ares_gettimeofday()
instead in order to not pollute the name space and risk colliding with
other libraries' versions of this function.
* October 24, 2003. Daniel Stenberg
Added ares_version().
Version 1.0-pre1 (8 October 2003)
- James Bursa made it run on RISC OS
- Dominick Meglio made it run fine on NT4
- Duncan Wilcox made it work fine on Mac OS X
- Daniel Stenberg adjusted the windows port
- liren at made the initial windows port
* Imported the sources from ares 1.1.1
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