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      1   Changelog for the c-ares project
      2 
      3 Version 1.7.5 (August 16, 2011)
      4 
      5 Fixed:
      6 
      7  o detection of semicolon comments in resolv.conf
      8  o avoid using system's inet_net_pton affected by the WLB-2008080064 advisory
      9  o replacement ares_inet_net_pton affected by the WLB-2008080064 advisory
     10  o replacement ares_inet_ntop affected by potential out of bounds write
     11  o added install target to Makefile.msvc
     12  o only fall back to AF_INET searches when looking for AF_UNSPEC addresses
     13  o fixed ares_parse_*_reply memory leaks
     14  o Use correct sizeof in ares_getnameinfo()
     15  o IPv6-on-windows: find DNS servers correctly
     16  o man pages: docs for the c-ares utility programs
     17  o getservbyport replacement for Win CE
     18  o config_sortlist: (win32) missing else
     19  o advance_tcp_send_queue: avoid NULL ptr dereference
     20  o configure: fix a bashism
     21  o ares_expand_name: Fix encoded length for indirect root
     22 
     23 Version 1.7.4 (December 9, 2010)
     24 
     25 Changed:
     26 
     27  o local-bind: Support binding to local interface/IPs, see
     28    ares_set_local_ip4, ares_set_local_ip6, ares_set_local_dev
     29 
     30 Fixed:
     31 
     32  o memory leak in ares_getnameinfo
     33  o add missing break that caused get_ares_servers to fail
     34  o ares_parse_a_reply: fix CNAME response parsing
     35  o init_by_options: don't copy an empty sortlist
     36  o Replaced uint32_t with unsigned int to fix broken builds
     37    on a couple of platforms
     38  o Fix lookup with HOSTALIASES set
     39  o adig: fix NAPTR parsing
     40  o compiler warning cleanups
     41 
     42 Version 1.7.3 (June 11, 2010)
     43 
     44 Fixed:
     45 
     46  o builds on Android
     47  o now includes all files necessary to build it (1.7.2 lacked a file)
     48 
     49 Version 1.7.2 (June 10, 2010)
     50 
     51 Changed:
     52 
     53  o Added ares_parse_mx_reply()
     54 
     55 Fixed:
     56 
     57  o ares_init: Last, not first instance of domain or search should win
     58  o improve alternative definition of bool
     59  o fix VS2010 compiler warnings
     60 
     61 
     62 Version 1.7.1 (Mar 23, 2010)
     63 
     64 * May 31, 2010 (Jakub Hrozek)
     65 - Use the last instance of domain/search, not the first one
     66 
     67 * March 23, 2010 (Daniel Stenberg)
     68 - We switched from CVS to git. See http://github.com/bagder/c-ares
     69 
     70 * March 5, 2010 (Daniel Stenberg)
     71 - Daniel Johnson provided fixes for building with the clang compiler.
     72 
     73 * March 5, 2010 (Yang Tse)
     74 - Added IPv6 name servers support. Implementation has been based on code,
     75   comments and feedback provided November and December of 2008 by Daniel
     76   Stenberg, Gregor Jasny, Phil Blundell and myself, December 2009 by Cedric
     77   Bail, and February 2010 by Jakub Hrozek on the c-ares mailing list. On
     78   March I reviewed all that, selected the best of each, and adjusted or
     79   extended parts of it to make the best fit.
     80 
     81   The external and visible result of all this is that two new functions are
     82   added to the external API, ares_get_servers() and ares_set_servers(), which
     83   becomes now the preferred way of getting and setting name servers for any
     84   ares channel as these support both IPv4 and IPv6 name servers.
     85 
     86   In order to not break ABI compatibility, ares_init_options() with option
     87   mask ARES_OPT_SERVERS and ares_save_options() may still be used in code
     88   which is intended to run on IPv4-only stacks. But remember that these
     89   functions do not support IPv6 name servers. This implies that if the user
     90   is capable of defining or providing an IPv6 name server, and the app is
     91   using ares_init_options() or ares_save_options() at some point to handle
     92   the name servers, the app will likely lose IPv6 name servers.
     93 
     94 * January 28, 2010 (Daniel Stenberg)
     95 - Tommie Gannert pointed out a silly bug in ares_process_fd() since it didn't
     96   check for broken connections like ares_process() did. Based on that, I
     97   merged the two functions into a single generic one with two front-ends.
     98 
     99 * December 29, 2009 (Yang Tse)
    100 - Laszlo Tamas Szabo adjusted Makefile.msvc compiler options so that where
    101   run-time error checks enabling compiler option /GZ was used it is replaced
    102   with equivalent /RTCsu for Visual Studio 2003 and newer versions. Option
    103   /GX is replaced with equivalent /EHsc for all versions. Also fixed socket
    104   data type for internal configure_socket function.
    105 
    106 * December 21, 2009 (Yang Tse)
    107 - Ingmar Runge noticed that Windows config-win32.h configuration file
    108   did not include a definition for HAVE_CLOSESOCKET which resulted in
    109   function close() being inappropriately used to close sockets.
    110 
    111 Version 1.7.0 (Nov 30, 2009)
    112 
    113 * November 26, 2009 (Yang Tse)
    114 - Larry Lansing fixed ares_parse_srv_reply to properly parse replies
    115   which might contain non-SRV answers, skipping over potential non-SRV
    116   ones such as CNAMEs.
    117 
    118 * November 23, 2009 (Yang Tse)
    119 - Changed naming convention for c-ares libraries built with MSVC, details
    120   and build instructions provided in README.msvc file.
    121 
    122 * November 22, 2009 (Yang Tse)
    123 - Jakub Hrozek fixed more function prototypes in man pages to sync them
    124   with the ones declared in ares.h
    125 
    126 - Jakub Hrozek renamed addrttl and addr6ttl structs to ares_addrttl and
    127   ares_addr6ttl in order to prevent name space pollution, along with
    128   necessary changes to code base and man pages.This change does not break
    129   ABI, there is no need to recompile existing applications. But existing
    130   applications using these structs with the old name will need source code
    131   adjustments when recompiled using c-ares 1.7.0.
    132 
    133 * November 21, 2009 (Yang Tse)
    134 - Added manifest stuff to Makefile.msvc.
    135 
    136 * November 20, 2009 (Yang Tse)
    137 - Fixed several function prototypes in man pages that were out of sync
    138   with the ones declared in ares.h.  Added ares_free_data() along with
    139   man page.  Updated ares_parse_srv_reply() and ares_parse_txt_reply()
    140   with changes from Jakub Hrozek making these now return linked lists
    141   instead of arrays, and merging the ares_free_data() adjustments.
    142 
    143 * November 10, 2009 (Yang Tse)
    144 - Updated MSVC 6.0 project files to match settings from Makefile.msvc.
    145 
    146 * November 9, 2009 (Yang Tse)
    147 - Makefile.msvc is now the reference method to build c-ares and sample
    148   programs with any MSVC compiler or MS Visual Studio version.  If no
    149   option or target are specified it builds dynamic and static c-ares
    150   libraries in debug and release flavours and also builds all sample
    151   programs using each of the different c-ares libraries.
    152 
    153 * November 2, 2009 (Yang Tse)
    154 - Renamed c-ares setup.h to ares_setup.h
    155 
    156 * October 31, 2009 (Yang Tse)
    157 - Symbol hiding configure options are named now --enable-symbol-hiding
    158   and --disable-symbol-hiding in an attempt to make them less ambiguous.
    159 
    160 * October 30, 2009 (Yang Tse)
    161 - Many fixes for ares_parse_txt_reply()
    162 
    163 * October 29, 2009 (Daniel Stenberg)
    164 - Jakub Hrozek added ares_parse_txt_reply() for TXT parsing
    165 
    166 * October 29, 2009 (Yang Tse)
    167 - Updated MSVC 6.0 workspace and project files that allows building
    168   dynamic and static c-ares libraries in debug and release flavours.
    169   Additionally each of the three sample programs is built against
    170   each of the four possible c-ares libraries, generating all this
    171   a total number of 12 executables and 4 libraries.
    172 
    173 * October 28, 2009 (Yang Tse)
    174 - Initial step towards the ability to reduce c-ares exported symbols
    175   when built as a shared library based on the 'visibility' attribute
    176   for GNUC and Intel compilers and based on __global for Sun compilers,
    177   taking also in account __declspec function decoration for Win32 and
    178   Symbian DLL's.
    179 
    180 * October 27, 2009 (Yang Tse)
    181 - Fixed Pelles C Win32 target compilation issues.
    182 
    183 * October 23, 2009 (Yang Tse)
    184 - John Engelhart noticed an unreleased problem relative to a duplicate
    185   ARES_ECANCELLED error code value and missing error code description.
    186 
    187 * October 7, 2009 (Yang Tse)
    188 - Overhauled ares__get_hostent() Fixing out of bounds memory overwrite
    189   triggered with malformed /etc/hosts file. Improving parsing of /etc/hosts
    190   file. Validating requested address family. Ensuring that failures always
    191   return a NULL pointer. Adjusting header inclusions.
    192 
    193 * October 6, 2009 (Yang Tse)
    194 - Fix ssize_t redefinition errors on WIN64 reported by Alexey Simak.
    195 
    196 * September 29, 2009 (Yang Tse)
    197 - Make configure script also check if _REENTRANT definition is required to
    198   make errno available as a preprocessor macro.
    199 
    200 * September 7, 2009 (Yang Tse)
    201 - Add T_SRV portability check to ares_parse_srv_reply.c
    202 
    203 * 4 Sep 2009 (Daniel Stenberg)
    204 - Jakub Hrozek added ares_parse_srv_reply() for SRV parsing
    205 
    206 * 3 Aug 2009 (Daniel Stenberg)
    207 - Joshua Kwan fixed the init routine to fill in the defaults for stuff that
    208   fails to get inited by other means. This fixes a case of when the c-ares
    209   init fails when internet access is fone.
    210 
    211 - Timo Teras changed the reason code used in the resolve callback done when
    212   ares_cancel() is used, to be ARES_ECANCELLED instead of ARES_ETIMEOUT to
    213   better allow the callback to know what's happening.
    214 
    215 * 14 Jul 2009 (Guenter Knauf)
    216 - renamed generated config.h to ares_config.h to avoid any future clashes
    217   with config.h from other projects.
    218 
    219 * June 20 2009 (Yang Tse)
    220 - Refactor how libraries are checked for connect() function in configure
    221   script and check for connect() as it is done for other functions.
    222 
    223 * June 19 2009 (Yang Tse)
    224 - Make sclose() function-like macro definition used to close a socket,
    225   now solely based on HAVE_CLOSESOCKET and HAVE_CLOSESOCKET_CAMEL
    226   config file preprocessor definitions
    227 
    228 * June 18 2009 (Yang Tse)
    229 - Add CloseSocket camel case function check for configure script.
    230 
    231 * June 17 2009 (Yang Tse)
    232 - Check for socket() and closesocket() as it is done for other functions
    233   in configure script.
    234 
    235 * June 11 2009 (Yang Tse)
    236 - Modified buildconf so that when automake runs it copies missing files
    237   instead of symlinking them.
    238 
    239 * June 8 2009 (Yang Tse)
    240 - Removed buildconf.bat from release and daily snapshot archives. This
    241   file is only for CVS tree checkout builds.
    242 
    243 * May 26 2009 (Yang Tse)
    244 - Added --enable-curldebug configure option to enable and disable building
    245   with the low-level curl debug memory tracking 'feature' to allow decoupled
    246   setting from --enable-debug, allowing again to build c-ares independently
    247   out of the CVS tree.
    248 
    249   For the c-ares library option --enable-debug enables debug build features
    250   which are _not_ related with memory tracking. For the c-ares library when
    251   --enable-debug is given it does not enable the memory tracking feature. If
    252   you wish to enable the curl debug memory tracking you must use configure
    253   option --enable-curldebug explicitily to do so.
    254 
    255   Internally, definition of preprocessor symbol DEBUGBUILD restricts code
    256   which is only compiled for debug enabled builds. And symbol CURLDEBUG is
    257   used to differentiate code which is _only_ used for memory tracking.
    258 
    259   Make ares_init(), ares_dup() and ares_init_options() fail returning
    260   ARES_ENOTINITIALIZED if library initialization has not been performed
    261   calling ares_library_init().
    262 
    263 * May 20 2009 (Yang Tse)
    264 - Added ares_library_init() and ares_library_cleanup() man pages.
    265 
    266 * May 19 2009 (Yang Tse)
    267 - Introduced ares_library_init() and ares_library_cleanup() functions.
    268 
    269   This is an API and ABI break for Win32/64 systems. Non-Win32/64 build targets
    270   using c-ares 1.7.0 can still survive without calling these functions. Read all
    271   the details on ares_library_init(3) and ares_library_cleanup(3) man pages that
    272   are included.
    273 
    274   curl/libcurl 7.19.5 is fully compatible with c-ares 1.7.0 on all systems.
    275 
    276   In order to use c-ares 1.7.0 with curl/libcurl on Win32/64 systems it is
    277   required that curl/libcurl is 7.19.5 or newer. In other words, it is not
    278   possible on Win32/64 to use c-ares 1.7.0 with a curl/libcurl version less
    279   than 7.19.5
    280 
    281 * May 11 2009 (Daniel Stenberg)
    282 - Gregor Jasny made c-ares link with libtool 's -export-symbols-regex option to
    283   only expose functions starting with ares_.
    284 
    285 * May 7 2009 (Yang Tse)
    286 - Fix an m4 overquoting triggering a spurious 'AS_TR_CPP' symbol definition
    287   attempt in generated config.h
    288 
    289 * May 2 2009 (Yang Tse)
    290 - Use a build-time configured ares_socklen_t data type instead of socklen_t.
    291 
    292 * April 21 2009 (Yang Tse)
    293 - Moved potential inclusion of system's malloc.h and memory.h header files to
    294   setup_once.h.  Inclusion of each header file is based on the definition of
    295   NEED_MALLOC_H and NEED_MEMORY_H respectively.
    296 
    297 * March 11 2009 (Yang Tse)
    298 - Japheth Cleaver fixed acountry.c replacing u_long with unsigned long.
    299 
    300 * February 20 2009 (Yang Tse)
    301 - Do not halt compilation when using VS2008 to build a Windows 2000 target.
    302 
    303 * February 3 2009 (Phil Blundell)
    304 - If the server returns garbage or nothing at all in response to an AAAA query,
    305   go on and ask for A records anyway.
    306 
    307 * January 31 2009 (Daniel Stenberg)
    308 - ares_gethostbyname() now accepts 'AF_UNSPEC' as a family for resolving
    309   either AF_INET6 or AF_INET. It works by accepting any of the looksups in the
    310   hosts file, and it resolves the AAAA field with a fallback to A.
    311 
    312 * January 14 2009 (Daniel Stenberg)
    313 - ares.h no longer uses the HAVE_STRUCT_IN6_ADDR define check, but instead it
    314   now declares the private struct ares_in6_addr for all systems instead of
    315   relying on one possibly not present in the system.
    316 
    317 * January 13 2009 (Phil Blundell)
    318 - ares__send_query() now varies the retry timeout pseudo-randomly to avoid
    319   packet storms when several queries were started at the same time.
    320 
    321 * January 11 2009 (Daniel Stenberg)
    322 - Phil Blundell added the internal function ares__expand_name_for_response()
    323   that is now used by the ares_parse_*_reply() functions instead of the
    324   ares_expand_name() simply to easier return ARES_EBADRESP for the cases where
    325   the name expansion fails as in responses that really isn't expected.
    326 
    327 Version 1.6.0 (Dec 9, 2008)
    328 
    329 * December 9 2008 (Gisle Vanem)
    330 
    331   Fixes for Win32 targets using the Watt-32 tcp/ip stack.
    332 
    333 * Dec 4 2008 (Daniel Stenberg)
    334 
    335   Gregor Jasny provided the patch that introduces ares_set_socket_callback(),
    336   and I edited it to also get duped by ares_dup().
    337 
    338 * Dec 3 2008 (Daniel Stenberg)
    339 
    340   API changes:
    341 
    342   I made sure the public ares_config struct looks like before and yet it
    343   supports the ROTATE option thanks to c-ares now storing the "optmask"
    344   internally. Thus we should be ABI compatible with the past release(s)
    345   now. My efforts mentioned below should not break backwards ABI compliance.
    346 
    347   Here's how I suggest we proceed with the API:
    348 
    349   ares_init() will be primary "channel creator" function.
    350 
    351   ares_init_options() will continue to work exactly like now and before. For
    352   starters, it will be the (only) way to set the existing options.
    353 
    354   ares_save_options() will continue to work like today, but will ONLY save
    355   options that you can set today (including ARES_OPT_ROTATE actually) but new
    356   options that we add may not be saved with this.
    357 
    358   Instead we introduce:
    359 
    360   ares_dup() that instead can make a new channel and clone the config used
    361   from an existing channel. It will then clone all config options, including
    362   future new things we add.
    363 
    364   ares_set_*() style functions that set (new) config options. As a start we
    365   simply add these for new functionality, but over time we can also introduce
    366   them for existing "struct ares_options" so that we can eventually deprecate
    367   the two ares_*_options() functions.
    368 
    369   ares_get_*() style functions for extracting info from a channel handle that
    370   should be used instead of ares_save_options().
    371 
    372 * Nov 26 2008 (Yang Tse)
    373 - Brad Spencer provided changes to allow buildconf to work on OS X.
    374 
    375 - Gerald Combs fixed a bug in ares_parse_ptr_reply() which would cause a
    376   buffer to shrink instead of expand if a reply contained 8 or more records.
    377 
    378 * Nov 25 2008 (Yang Tse)
    379 - In preparation for the upcomming IPv6 nameservers patch, the internal
    380   ares_addr union is now changed into an internal struct which also holds
    381   the address family.
    382 
    383 * Nov 19 2008 (Daniel Stenberg)
    384 - Brad Spencer brought the new function ares_gethostbyname_file() which simply
    385   resolves a host name from the given file, using the regular hosts syntax.
    386 
    387 * Nov 1 2008 (Daniel Stenberg)
    388 - Carlo Contavalli added support for the glibc "rotate" option, as documented
    389   in man resolv.conf:
    390 
    391   causes round robin selection of nameservers from among those listed.  This
    392   has the effect of spreading the query load among all listed servers, rather
    393   than having all clients try the first listed server first every time.
    394 
    395   You can enable it with ARES_OPT_ROTATE
    396 
    397 * Oct 21 2008 (Yang Tse)
    398   Charles Hardin added handling of EINPROGRESS for UDP connects.
    399 
    400 * Oct 18 2008 (Daniel Stenberg)
    401   Charles Hardin made adig support a regular numerical dotted IP address for the
    402   -s option as well.
    403 
    404 * Oct 7 2008 (Yang Tse)
    405 - Added --enable-optimize configure option to enable and disable compiler
    406   optimizations to allow decoupled setting from --enable-debug.
    407 
    408 * Oct 2 2008 (Yang Tse)
    409 - Added --enable-warnings configure option to enable and disable strict
    410   compiler warnings to allow decoupled setting from --enable-debug.
    411 
    412 * Sep 17 2008 (Yang Tse)
    413 - Code reorganization to allow internal/private use of "nameser.h" to any
    414   system that lacks arpa/nameser.h or arpa/nameser_compat.h header files.
    415 
    416 * Sep 16 2008 (Yang Tse)
    417 - Code reorganization to allow internal/private use of ares_writev to any
    418   system that lacks the writev function.
    419 
    420 * Sep 15 2008 (Yang Tse)
    421 - Code reorganization to allow internal/private use of ares_strcasecmp to any
    422   system that lacks the strcasecmp function.
    423 
    424 - Improve configure detection of some string functions.
    425 
    426 * Sep 11 2008 (Yang Tse)
    427 - Code reorganization to allow internal/private use of ares_strdup to any
    428   system that lacks the strdup function.
    429 
    430 Version 1.5.3 (Aug 29, 2008)
    431 
    432 * Aug 25 2008 (Yang Tse)
    433 - Improvement by Brad House:
    434 
    435   This patch addresses an issue in which a response could be sent back to the
    436   source port of a client from a different address than the request was made to.
    437   This is one form of a DNS cache poisoning attack.
    438 
    439   The patch simply uses recvfrom() rather than recv() and validates that the
    440   address returned from recvfrom() matches the address of the server we have
    441   connected to. Only necessary on UDP sockets as they are connection-less, TCP
    442   is unaffected.
    443 
    444 - Fix by George Neill:
    445   Fixed compilation of acountry sample application failure on some systems.
    446 
    447 * Aug 4 2008 (Daniel Stenberg)
    448 - Fix by Tofu Linden:
    449 
    450   The symptom:
    451   * Users (usually, but not always) on 2-Wire routers and the Comcast service
    452   and a wired connection to their router would find that the second and
    453   subsequent DNS lookups from fresh processes using c-ares to resolve the same
    454   address would cause the process to never see a reply (it keeps polling for
    455   around 1m15s before giving up).
    456 
    457   The repro:
    458   * On such a machine (and yeah, it took us a lot of QA to find the systems
    459   that reproduce such a specific problem!), do 'ahost www.secondlife.com',
    460   then do it again.  The first process's lookup will work, subsequent lookups
    461   will time-out and fail.
    462 
    463   The cause:
    464   * init_id_key() was calling randomize_key() *before* it initialized
    465   key->state, meaning that the randomness generated by randomize_key() is
    466   immediately overwritten with deterministic values. (/dev/urandom was also
    467   being read incorrectly in the c-ares version we were using, but this was
    468   fixed in a later version.)
    469   * This makes the stream of generated query-IDs from any new c-ares process
    470   be an identical and predictable sequence of IDs.
    471   * This makes the 2-Wire's default built-in DNS server detect these queries
    472   as probable-duplicates and (erroneously) not respond at all.
    473 
    474 
    475 * Aug 4 2008 (Yang Tse)
    476 - Autoconf 2.62 has changed the behaviour of the AC_AIX macro which we use.
    477   Prior versions of autoconf defined _ALL_SOURCE if _AIX was defined. 2.62
    478   version of AC_AIX defines _ALL_SOURCE and other four preprocessor symbols
    479   no matter if the system is AIX or not. To keep the traditional behaviour,
    480   and an uniform one across autoconf versions AC_AIX is replaced with our
    481   own internal macro CARES_CHECK_AIX_ALL_SOURCE.
    482 
    483 * Aug 1 2008 (Yang Tse)
    484 - Configure process now checks if the preprocessor _REENTRANT symbol is already
    485   defined. If it isn't currently defined a set of checks are performed to test
    486   if its definition is required to make visible to the compiler a set of *_r
    487   functions. Finally, if _REENTRANT is already defined or needed it takes care
    488   of making adjustments necessary to ensure that it is defined equally for the
    489   configure process tests and generated config file.
    490 
    491 * Jul 20 2008 (Yang Tse)
    492 - When recvfrom prototype uses a void pointer for arguments 2, 5 or 6 this will
    493   now cause the definition, as appropriate, of RECVFROM_TYPE_ARG2_IS_VOID,
    494   RECVFROM_TYPE_ARG5_IS_VOID or RECVFROM_TYPE_ARG6_IS_VOID.
    495 
    496 * Jul 17 2008 (Yang Tse)
    497 - RECVFROM_TYPE_ARG2, RECVFROM_TYPE_ARG5 and RECVFROM_TYPE_ARG6 are now defined
    498   to the data type pointed by its respective argument and not the pointer type.
    499 
    500 * Jul 16 2008 (Yang Tse)
    501 - Improved configure detection of number of arguments for getservbyport_r.
    502   Detection is now based on compilation checks instead of linker ones.
    503 
    504 - Configure process now checks availability of recvfrom() socket function and
    505   finds out its return type and the types of its arguments. Added definitions
    506   for non-configure systems config files, and introduced macro sreadfrom which
    507   will be used on udp sockets as a recvfrom() wrapper in the future.
    508 
    509 * Jul 15 2008 (Yang Tse)
    510 - Introduce definition of _REENTRANT symbol in setup.h to improve library
    511   usability.  Previously the configure process only used the AC_SYS_LARGEFILE
    512   macro for debug builds, now it is also used for non-debug ones enabling the
    513   use of configure options --enable-largefile and --disable-largefile which
    514   might be needed for library compatibility.  Remove checking the size of
    515   curl_off_t, it is no longer needed.
    516 
    517 * Jul 3 2008 (Daniel Stenberg)
    518 - Phil Blundell: If you ask ares_gethostbyname() to do an AF_INET6 lookup and
    519   the target host has only A records, it automatically falls back to an
    520   AF_INET lookup and gives you the A results.  However, if the target host has
    521   a CNAME record, this behaviour is defeated since the original query does
    522   return some data even though ares_parse_aaa_reply() doesn't consider it
    523   relevant. Here's a small patch to make it behave the same with and without
    524   the CNAME.
    525 
    526 * Jul 2 2008 (Yang Tse)
    527 - Fallback to gettimeofday when monotonic clock is unavailable at run-time.
    528 
    529 * Jun 30 2008 (Daniel Stenberg)
    530 
    531 - As was pointed out to me by Andreas Schuldei, the MAXHOSTNAMELEN define is
    532   not posix or anything and thus c-ares failed to build on hurd (and possibly
    533   elsewhere). The define was also somewhat artificially used in the windows
    534   port. Now, I instead rewrote the use of gethostbyname to enlarge the host
    535   name buffer in case of need and totally avoid the use of the MAXHOSTNAMELEN
    536   define. I thus also removed the defien from the namser.h file where it was
    537   once added for the windows build.
    538 
    539   I also fixed init_by_defaults() function to not leak memory in case if
    540   error.
    541 
    542 * Jun 9 2008 (Yang Tse)
    543 
    544 - Make libcares.pc generated file for pkg-config include information relative
    545   to the libraries needed for the static linking of c-ares.
    546 
    547 * May 30 2008 (Yang Tse)
    548 
    549 - Brad House fixed a missing header file inclusion in adig sample program.
    550 
    551 Version 1.5.2 (May 29, 2008)
    552 
    553 * May 13 2008 (Daniel Stenberg)
    554 
    555 - Introducing millisecond resolution support for the timeout option. See
    556   ares_init_options()'s ARES_OPT_TIMEOUTMS.
    557 
    558 * May 9 2008 (Yang Tse)
    559 
    560 - Use monotonic time source if available, for private function ares__tvnow()
    561 
    562 * May 7 2008 (Daniel Stenberg)
    563 
    564 - Sebastian made c-ares able to return all PTR-records when doing reverse
    565   lookups. It is not common practice to have multiple PTR-Records for a single
    566   IP, but its perfectly legal and some sites have those.
    567 
    568 - Doug Goldstein provided a configure patch: updates autoconf 2.13 usage to
    569   autoconf 2.57 usage (which is the version you have specified as the minimum
    570   version). It's a minor change but it does clean up some warnings with newer
    571   autoconf (specifically 2.62).
    572 
    573 * May 5 2008 (Yang Tse)
    574 
    575 - Improved parsing of resolver configuration files.
    576 
    577 * April 4 2008 (Daniel Stenberg)
    578 
    579 - Eino Tuominen improved the code when a file is used to seed the randomizer.
    580 
    581 - Alexey Simak made adig support NAPTR records
    582 
    583 - Alexey Simak fixed the VC dsp file by adding the missing source file
    584   ares_expand_string.c
    585 
    586 * December 11 2007 (Gisle Vanem)
    587 
    588 - Added another sample application; acountry.c which converts an
    589   IPv4-address(es) and/or host-name(s) to country-name and country-code.
    590   This uses the service of the DNSBL at countries.nerd.dk.
    591 
    592 * December 3 2007 (Daniel Stenberg)
    593 
    594 - Brad Spencer fixed the configure script to assume that there's no
    595   /dev/urandom when built cross-compiled as then the script cannot check for
    596   it.
    597 
    598 - Erik Kline cleaned up ares_gethostbyaddr.c:next_lookup() somewhat
    599 
    600 Version 1.5.1 (Nov 21, 2007)
    601 
    602 * November 21 2007 (Daniel Stenberg)
    603 
    604 - Robin Cornelius pointed out that ares_llist.h was missing in the release
    605   archive for 1.5.0
    606 
    607 Version 1.5.0 (Nov 21, 2007)
    608 
    609 * October 2 2007 (Daniel Stenberg)
    610 
    611 - ares_strerror() segfaulted if the input error number was out of the currently
    612   supported range.
    613 
    614 - Yang Tse: Avoid a segfault when generating a DNS "Transaction ID" in
    615   internal function init_id_key() under low memory conditions.
    616 
    617 * September 28 2007 (Daniel Stenberg)
    618 
    619 - Bumped version to 1.5.0 for next release and soname bumped to 2 due to ABI
    620   and API changes in the progress callback (and possibly more coming up from
    621   Steinar)
    622 
    623 * September 28 2007 (Steinar H. Gunderson)
    624 
    625 - Don't skip a server if it's the only one. (Bugfix from the Google tree.)
    626 
    627 - Made the query callbacks receive the number of timeouts that happened during
    628   the execution of a query, and updated documentation accordingly. (Patch from
    629   the Google tree.)
    630 
    631 - Support a few more socket options: ARES_OPT_SOCK_SNDBUF and
    632   ARES_OPT_SOCK_RCVBUF
    633 
    634 - Always register for TCP events even if there are no outstanding queries, as
    635   the other side could always close the connection, which is a valid event
    636   which should be responded to.
    637 
    638 * September 22 2007 (Daniel Stenberg)
    639 
    640 - Steinar H. Gunderson fixed: Correctly clear sockets from the fd_set on in
    641   several functions (write_tcp_data, read_tcp_data, read_udp_packets) so that
    642   if it fails and the socket is closed the following code doesn't try to use
    643   the file descriptor.
    644 
    645 - Steinar H. Gunderson modified c-ares to now also do to DNS retries even when
    646   TCP is used since there are several edge cases where it still makes sense.
    647 
    648 - Brad House provided a fix for ares_save_options():
    649 
    650   Apparently I overlooked something with the ares_save_options() where it
    651   would try to do a malloc(0) when no options of that type needed to be saved.
    652   On most platforms, this was fine because malloc(0) doesn't actually return
    653   NULL, but on AIX it does, so ares_save_options would return ARES_ENOMEM.
    654 
    655 * July 14 2007 (Daniel Stenberg)
    656 
    657 - Vlad Dinulescu fixed two outstanding valgrind reports:
    658 
    659   1. In ares_query.c , in find_query_by_id we compare q->qid (which is a short
    660   int variable) with qid, which is declared as an int variable.  Moreover,
    661   DNS_HEADER_SET_QID is used to set the value of qid, but DNS_HEADER_SET_QID
    662   sets only the first two bytes of qid. I think that qid should be declared as
    663   "unsigned short" in this function.
    664 
    665   2. The same problem occurs in ares_process.c, process_answer() .  query->qid
    666   (an unsigned short integer variable) is compared with id, which is an
    667   integer variable. Moreover, id is initialized from DNS_HEADER_QID which sets
    668   only the first two bytes of id. I think that the id variable should be
    669   declared as "unsigned short" in this function.
    670 
    671   Even after declaring these variables as "unsigned short", the valgrind
    672   errors are still there. Which brings us to the third problem.
    673 
    674   3. The third problem is that Valgrind assumes that query->qid is not
    675   initialised correctly. And it does that because query->qid is set from
    676   DNS_HEADER_QID(qbuf); Valgrind says that qbuf has unitialised bytes. And
    677   qbuf has uninitialised bytes because of channel->next_id . And next_id is
    678   set by ares_init.c:ares__generate_new_id() . I found that putting short r=0
    679   in this function (instead of short r) makes all Valgrind warnings go away.
    680   I have studied ares__rc4() too, and this is the offending line:
    681 
    682         buffer_ptr[counter] ^= state[xorIndex];   (ares_query.c:62)
    683 
    684   This is what triggers Valgrind.. buffer_ptr is unitialised in this function,
    685   and by applying ^= on it, it remains unitialised.
    686 
    687 Version 1.4.0 (June 8, 2007)
    688 
    689 * June 4 2007 (Daniel Stenberg)
    690 
    691 - James Bursa reported a major memory problem when resolving multi-IP names
    692   and I found and fixed the problem. It was added by Ashish Sharma's patch
    693   two days ago.
    694 
    695   When I then tried to verify multiple entries in /etc/hosts after my fix, I
    696   got another segfault and decided this code was not ripe for inclusion and I
    697   reverted the patch.
    698 
    699 * June 2 2007
    700 
    701 - Brad Spencer found and fixed three flaws in the code, found with the new
    702   gcc 4.2.0 warning: -Waddress
    703 
    704 - Brad House fixed VS2005 compiler warnings due to time_t being 64bit.
    705   He also made recent Microsoft compilers use _strdup() instead of strdup().
    706 
    707 - Brad House's man pages for ares_save_options() and ares_destroy_options()
    708   were added.
    709 
    710 - Ashish Sharma provided a patch for supporting multiple entries in the
    711   /etc/hosts file. Patch edited for coding style and functionality by me
    712   (Daniel).
    713 
    714 * May 30 2007
    715 
    716 - Shmulik Regev brought cryptographically secure transaction IDs:
    717 
    718   The c-ares library implementation uses a DNS "Transaction ID" field that is
    719   seeded with a pseudo random number (based on gettimeofday) which is
    720   incremented (++) between consecutive calls and is therefore rather
    721   predictable. In general, predictability of DNS Transaction ID is a well
    722   known security problem (e.g.
    723   http://bak.spc.org/dms/archive/dns_id_attack.txt) and makes a c-ares based
    724   implementation vulnerable to DNS poisoning. Credit goes to Amit Klein
    725   (Trusteer) for identifying this problem.
    726 
    727   The patch I wrote changes the implementation to use a more secure way of
    728   generating unique IDs. It starts by obtaining a key with reasonable entropy
    729   which is used with an RC4 stream to generate the cryptographically secure
    730   transaction IDs.
    731 
    732   Note that the key generation code (in ares_init:randomize_key) has two
    733   versions, the Windows specific one uses a cryptographically safe function
    734   provided (but undocumented :) by the operating system (described at
    735   http://blogs.msdn.com/michael_howard/archive/2005/01/14/353379.aspx).  The
    736   default implementation is a bit naive and uses the standard 'rand'
    737   function. Surely a better way to generate random keys exists for other
    738   platforms.
    739 
    740   The patch can be tested by using the adig utility and using the '-s' option.
    741 
    742 - Brad House added ares_save_options() and ares_destroy_options() that can be
    743   used to keep options for later re-usal when ares_init_options() is used.
    744 
    745   Problem: Calling ares_init() for each lookup can be unnecessarily resource
    746          intensive.  On windows, it must LoadLibrary() or search the registry
    747          on each call to ares_init().  On unix, it must read and parse
    748          multiple files to obtain the necessary configuration information.  In
    749          a single-threaded environment, it would make sense to only
    750          ares_init() once, but in a heavily multi-threaded environment, it is
    751          undesirable to ares_init() and ares_destroy() for each thread created
    752          and track that.
    753 
    754   Solution: Create ares_save_options() and ares_destroy_options() functions to
    755          retrieve and free options obtained from an initialized channel.  The
    756          options populated can be used to pass back into ares_init_options(),
    757          it should populate all needed fields and not retrieve any information
    758          from the system.  Probably wise to destroy the cache every minute or
    759          so to prevent the data from becoming stale.
    760 
    761 - Daniel S added ares_process_fd() to allow applications to ask for processing
    762   on specific sockets and thus avoiding select() and associated
    763   functions/macros.  This function will be used by upcoming libcurl releases
    764   for this very reason. It also made me export the ares_socket_t type in the
    765   public ares.h header file, since ares_process_fd() uses that type for two of
    766   the arguments.
    767 
    768 * May 25 2007
    769 
    770 - Ravi Pratap fixed a flaw in the init_by_resolv_conf() function for windows
    771   that could cause it to return a bad return code.
    772 
    773 * April 16 2007
    774 
    775 - Yang Tse: Provide ares_getopt() command-line parser function as a source
    776   code helper function, not belonging to the actual c-ares library.
    777 
    778 * February 19 2007
    779 
    780 - Vlad Dinulescu added ares_parse_ns_reply().
    781 
    782 * February 13 2007
    783 
    784 - Yang Tse: Fix failure to get the search sequence of /etc/hosts and
    785   DNS from /etc/nsswitch.conf, /etc/host.conf or /etc/svc.conf when
    786   /etc/resolv.conf did not exist or was unable to read it.
    787 
    788 * November 22 2006
    789 
    790 - Install ares_dns.h too
    791 
    792 - Michael Wallner fixed this problem: When I set domains in the options
    793   struct, and there are domain/search entries in /etc/resolv.conf, the domains
    794   of the options struct will be overridden.
    795 
    796 * November 6 2006
    797 
    798 - Yang Tse removed a couple of potential zero size memory allocations.
    799 
    800 - Andreas Rieke fixed the line endings in the areslib.dsp file that I (Daniel)
    801   broke in the 1.3.2 release. We should switch to a system where that file is
    802   auto-generated. We could rip some code for that from curl...
    803 
    804 Version 1.3.2 (November 3, 2006)
    805 
    806 * October 12 2006
    807 
    808 - Prevent ares_getsock() to overflow if more than 16 sockets are used.
    809 
    810 * September 11 2006
    811 
    812 - Guilherme Balena Versiani: I noted a strange BUG in Win32 port
    813   (ares_init.c/get_iphlpapi_dns_info() function): when I disable the network
    814   by hand or disconnect the network cable in Windows 2000 or Windows XP, my
    815   application gets 127.0.0.1 as the only name server. The problem comes from
    816   'GetNetworkParams' function, that returns the empty string "" as the only
    817   name server in that case. Moreover, the Windows implementation of
    818   inet_addr() returns INADDR_LOOPBACK instead of INADDR_NONE.
    819 
    820 * August 29 2006
    821 
    822 - Brad Spencer did
    823 
    824   o made ares_version.h use extern "C" for c++ compilers
    825   o fixed compiler warnings in ares_getnameinfo.c
    826   o fixed a buffer position init for TCP reads
    827 
    828 * August 3 2006
    829 
    830 - Ravi Pratap fixed ares_getsock() to actually return the proper bitmap and
    831   not always zero!
    832 
    833 Version 1.3.1 (June 24, 2006)
    834 
    835 * July 23, 2006
    836 
    837 - Gisle Vanem added getopt() to the ahost program. Currently accepts
    838   only [-t {a|aaaa}] to specify address family in ares_gethostbyname().
    839 
    840 * June 19, 2006
    841 
    842 - (wahern) Removed "big endian" DNS section and RR data integer parser
    843   macros from ares_dns.h, which break c-ares on my Sparc64. Bit-wise
    844   operations in C operate on logical values. And in any event the octets are
    845   already in big-endian (aka network) byte order so they're being reversed
    846   (thus the source of the breakage).
    847 
    848 * June 18, 2006
    849 
    850 - William Ahern handles EAGAIN/EWOULDBLOCK errors in most of the I/O calls
    851   from area_process.c.
    852 
    853   TODO: Handle one last EAGAIN for a UDP socket send(2) in
    854   ares__send_query().
    855 
    856 * May 10, 2006
    857 
    858 - Bram Matthys brought my attention to a libtool peculiarity where detecting
    859   things such as C++ compiler actually is a bad thing and since we don't need
    860   that detection I added a work-around, much inspired by a previous patch by
    861   Paolo Bonzini. This also shortens the configure script quite a lot.
    862 
    863 * May 3, 2006
    864 
    865 - Nick Mathewson added the ARES_OPT_SOCK_STATE_CB option that when set makes
    866   c-ares call a callback on socket state changes. A better way than the
    867   ares_getsock() to get full control over the socket state.
    868 
    869 * January 9, 2006
    870 
    871 - Alexander Lazic improved the getservbyport_r() configure check.
    872 
    873 * January 6, 2006
    874 
    875 - Alexander Lazic pointed out that the buildconf should use the ACLOCAL_FLAGS
    876   variable for easier controlling what it does and how it runs.
    877 
    878 * January 5, 2006
    879 
    880 - James Bursa fixed c-ares to find the hosts file on RISC OS, and made it
    881   build with newer gcc versions that no longer defines "riscos".
    882 
    883 * December 22
    884 
    885 - Daniel Stenberg added ares_getsock() that extracts the set of sockets to
    886   wait for action on. Similar to ares_fds() but not restricted to using
    887   select() for the waiting.
    888 
    889 * November 25
    890 
    891 - Yang Tse fixed some send() / recv() compiler warnings
    892 
    893 * September 18
    894 
    895 - Added constants that will be used by ares_getaddrinfo
    896 
    897 - Made ares_getnameinfo use the reentrant getservbyport (getservbyport_r) if it
    898   is available to ensure it works properly in a threaded environment.
    899 
    900 * September 10
    901 
    902 - configure fix for detecting a member in the sockaddr_in6 struct which failed
    903   on ipv6-enabled HP-UX 11.00
    904 
    905 Version 1.3.0 (August 29, 2005)
    906 
    907 * August 21
    908 
    909 - Alfredo Tupone provided a fix for the Windows code in get_iphlpapi_dns_info()
    910   when getting the DNS server etc.
    911 
    912 * June 19
    913 
    914 - Added some checks for the addrinfo structure.
    915 
    916 * June 2
    917 
    918 - William Ahern:
    919 
    920   Make UDP sockets non-blocking. I've confirmed that at least on Linux 2.4 a
    921   read event can come back from poll() on a valid SOCK_DGRAM socket but
    922   recv(2) will still block. This patch doesn't ignore EAGAIN in
    923   read_udp_packets(), though maybe it should. (This patch was edited by Daniel
    924   Stenberg and a new configure test was added (imported from curl's configure)
    925   to properly detect what non-blocking socket approach to use.)
    926 
    927   I'm not quite sure how this was happening, but I've been seeing PTR queries
    928   which seem to return empty responses. At least, they were empty when calling
    929   ares_expand_name() on the record. Here's a patch which guarantees to
    930   NUL-terminate the expanded name. The old behavior failed to NUL-terminate if
    931   len was 0, and this was causing strlen() to run past the end of the buffer
    932   after calling ares_expand_name() and getting ARES_SUCCESS as the return
    933   value. If q is not greater than *s then it's equal and *s is always
    934   allocated with at least one byte.
    935 
    936 * May 16
    937 
    938 - Added ares_getnameinfo which mimics the getnameinfo API (another feature
    939   that could use testing).
    940 
    941 * May 14
    942 
    943 - Added an inet_ntop function from BIND for systems that do not have it.
    944 
    945 * April 9
    946 
    947 - Made sortlist support IPv6 (this can probably use some testing).
    948 
    949 - Made sortlist support CIDR matching for IPv4.
    950 
    951 * April 8
    952 
    953 - Added preliminary IPv6 support to ares_gethostbyname. Currently, sortlist
    954   does not work with IPv6. Also provided an implementation of bitncmp from
    955   BIND for systems that do not supply this function. This will be used to add
    956   IPv6 support to sortlist.
    957 
    958 - Made ares_gethostbyaddr support IPv6 by specifying AF_INET6 as the family.
    959   The function can lookup IPv6 addresses both from files (/etc/hosts) and
    960   DNS lookups.
    961 
    962 * April 7
    963 
    964 - Tupone Alfredo fixed includes of arpa/nameser_compat.h to build fine on Mac
    965   OS X.
    966 
    967 * April 5
    968 
    969 - Dominick Meglio: Provided implementations of inet_net_pton and inet_pton
    970   from BIND for systems that do not include these functions.
    971 
    972 * March 11, 2005
    973 
    974 - Dominick Meglio added ares_parse_aaaa_reply.c and did various
    975   adjustments. The first little steps towards IPv6 support!
    976 
    977 * November 7
    978 
    979 - Fixed the VC project and makefile to use ares_cancel and ares_version
    980 
    981 * October 24
    982 
    983 - The released ares_version.h from 1.2.1 says 1.2.0 due to a maketgz flaw.
    984   This is now fixed.
    985 
    986 Version 1.2.1 (October 20, 2004)
    987 
    988 * September 29
    989 
    990 - Henrik Stoerner fix: got a report that Tru64 Unix (the unix from Digital
    991   when they made Alpha's) uses /etc/svc.conf for the purpose fixed below for
    992   other OSes. He made c-ares check for and understand it if present.
    993 
    994 - Now c-ares will use local host name lookup _before_ DNS resolving by default
    995   if nothing else is told.
    996 
    997 * September 26
    998 
    999 - Henrik Stoerner: found out that c-ares does not look at the /etc/host.conf
   1000   file to determine the sequence in which to search /etc/hosts and DNS.  So on
   1001   systems where this order is defined by /etc/host.conf instead of a "lookup"
   1002   entry in /etc/resolv.conf, c-ares will always default to looking in DNS
   1003   first, and /etc/hosts second.
   1004 
   1005   c-ares now looks at
   1006 
   1007   1) resolv.conf (for the "lookup" line);
   1008   2) nsswitch.fon (for the "hosts:" line);
   1009   3) host.conf (for the "order" line).
   1010 
   1011   First match wins.
   1012 
   1013 - Dominick Meglio patched: C-ares on Windows assumed that the HOSTS file is
   1014   located in a static location. It assumed
   1015   C:\Windows\System32\Drivers\Etc. This is a poor assumption to make. In fact,
   1016   the location of the HOSTS file can be changed via a registry setting.
   1017 
   1018   There is a key called DatabasePath which specifies the path to the HOSTS
   1019   file:
   1020   http://www.microsoft.com/technet/itsolutions/network/deploy/depovg/tcpip2k.mspx
   1021 
   1022   The patch will make c-ares correctly consult the registry for the location
   1023   of this file.
   1024 
   1025 * August 29
   1026 
   1027 - Gisle Vanem fixed the MSVC build files.
   1028 
   1029 * August 20
   1030 
   1031 - Gisle Vanem made c-ares build and work with his Watt-32 TCP/IP stack.
   1032 
   1033 * August 13
   1034 
   1035 - Harshal Pradhan made a minor syntax change in ares_init.c to make it build
   1036   fine with MSVC 7.1
   1037 
   1038 * July 24
   1039 
   1040 - Made the lib get built static only if --enable-debug is used.
   1041 
   1042 - Gisle Vanem fixed:
   1043 
   1044   Basically in loops like handle_errors(), 'query->next' was assigned a local
   1045   variable and then query was referenced after the memory was freed by
   1046   next_server(). I've changed that so next_server() and end_query() returns
   1047   the next query. So callers should use this ret-value.
   1048 
   1049   The next problem was that 'server->tcp_buffer_pos' had a random value at
   1050   entry to 1st recv() (luckily causing Winsock to return ENOBUFS).
   1051 
   1052   I've also added a ares_writev() for Windows to streamline the code a bit
   1053   more.
   1054 
   1055 * July 20
   1056 - Fixed a few variable return types for some system calls. Made configure
   1057   check for ssize_t to make it possible to use that when receiving the send()
   1058   error code. This is necessary to prevent compiler warnings on some systems.
   1059 
   1060 - Made configure create config.h, and all source files now include setup.h that
   1061   might include the proper config.h (or a handicrafted alternative).
   1062 
   1063 - Switched to 'ares_socket_t' type for sockets in ares, since Windows don't
   1064   use 'int' for that.
   1065 
   1066 - automake-ified and libool-ified c-ares. Now it builds libcares as a shared
   1067   lib on most platforms if wanted. (This bloated the size of the release
   1068   archive with another 200K!)
   1069 
   1070 - Makefile.am now uses Makefile.inc for the c sources, h headers and man
   1071   pages, to make it easier for other makefiles to use the exact same set of
   1072   files.
   1073 
   1074 - Adjusted 'maketgz' to use the new automake magic when building distribution
   1075   archives.
   1076 
   1077 - Anyone desires HTML and/or PDF versions of the man pages in the release
   1078   archives?
   1079 
   1080 * July 3
   1081 - Gnter Knauf made c-ares build and run on Novell Netware.
   1082 
   1083 * July 1
   1084 - Gisle Vanem provided Makefile.dj to build with djgpp, added a few more djgpp
   1085   fixes and made ares not use 'errno' to provide further info on Windows.
   1086 
   1087 * June 30
   1088 - Gisle Vanem made it build with djgpp and run fine with the Watt-32 stack.
   1089 
   1090 * June 10
   1091 - Gisle Vanem's init patch for Windows:
   1092 
   1093   The init_by_resolv_conf() function fetches the DNS-server(s)
   1094   from a series of registry branches.
   1095 
   1096   This can be wrong in the case where DHCP has assigned nameservers, but the
   1097   user has overridden these servers with other prefered settings. Then it's
   1098   wrong to use the DHCPNAMESERVER setting in registry.
   1099 
   1100   In the case of no global DHCP-assigned or fixed servers, but DNS server(s)
   1101   per adapter, one has to query the adapter branches.  But how can c-ares know
   1102   which adapter is valid for use? AFAICS it can't. There could be one adapter
   1103   that is down (e.g. a VPN adapter).
   1104 
   1105   So it's better to leave this to the IP Helper API (iphlapi) available in
   1106   Win-98/2000 and later. My patch falls-back to the old way if not available.
   1107 
   1108 * June 8
   1109 - James Bursa fixed an init issue for RISC OS.
   1110 
   1111 * May 11
   1112 - Nico Stappenbelt reported that when processing domain and search lines in
   1113   the resolv.conf file, the first entry encountered is processed and used as
   1114   the search list. According to the manual pages for both Linux, Solaris and
   1115   Tru64, the last entry of either a domain or a search field is used.
   1116 
   1117   This is now adjusted in the code
   1118 
   1119 Version 1.2.0 (April 13, 2004)
   1120 
   1121 * April 2, 2004
   1122 - Updated various man pages to look nicer when converted to HTML on the web
   1123   site.
   1124 
   1125 * April 1, 2004
   1126 - Dirk Manske provided a new function that is now named ares_cancel(). It is
   1127   used to cancel/cleanup a resolve/request made using ares functions on the
   1128   given ares channel. It does not destroy/kill the ares channel itself.
   1129 
   1130 - Dominick Meglio cleaned up the formatting in several man pages.
   1131 
   1132 * March 30, 2004
   1133 - Dominick Meglio's new ares_expand_string. A helper function when decoding
   1134   incoming DNS packages.
   1135 
   1136 - Daniel Stenberg modified the Makefile.in to use a for loop for the man page
   1137   installation to improve overview and make it easier to add man pages.
   1138 
   1139 Version 1.1.0 (March 11, 2004)
   1140 
   1141 * March 9, 2004
   1142 - Gisle Vanem improved build on Windows.
   1143 
   1144 * February 25, 2004
   1145 - Dan Fandrich found a flaw in the Feb 22 fix.
   1146 
   1147 - Added better configure --enable-debug logic (taken from the curl configure
   1148   script). Added acinclude.m4 to the tarball.
   1149 
   1150 * February 23, 2004
   1151 - Removed ares_free_errmem(), the function, the file and the man page. It was
   1152   not used and it did nothing.
   1153 
   1154 - Fixed a lot of code that wasn't "64bit clean" and thus caused a lot of
   1155   compiler warnings on picky compilers.
   1156 
   1157 * February 22, 2004
   1158 - Dominick Meglio made ares init support multiple name servers in the
   1159   NameServer key on Windows.
   1160 
   1161 * February 16, 2004
   1162 - Modified ares_private.h to include libcurl's memory debug header if
   1163   CURLDEBUG is set. This makes all the ares-functions supervised properly by
   1164   the curl test suite. This also forced me to add inclusion of the
   1165   ares_private.h header in a few more files that are using some kind of
   1166   memory-related resources.
   1167 
   1168 - Made the makefile only build ahost and adig if 'make demos' is used.
   1169 
   1170 * February 10, 2004
   1171 - Dirk Manske made ares_version.h installed with 'make install'
   1172 
   1173 * February 4, 2004
   1174 - ares_free_errmem() is subject for removal, it is simply present for future
   1175   purposes, and since we removed the extra parameter in strerror() it won't
   1176   be used by c-ares!
   1177 - configure --enable-debug now enables picky compiler options if gcc is used
   1178 - fixed several compiler warnings --enable-debug showed and Joerg Mueller-Tolk
   1179   reported
   1180 
   1181 Version 1.0.0 (February 3, 2004)
   1182 
   1183 * February 3, 2004
   1184 - now we produce the libcares.a library instead of the previous libares.a
   1185   since we are no longer compatible
   1186 
   1187 * February 2, 2004
   1188 
   1189 - ares_strerror() has one argument less. This is the first official
   1190   modification of the existing provided ares API.
   1191 
   1192 * January 29, 2004
   1193 
   1194 - Dirk Manske fixed how the socket is set non-blocking.
   1195 
   1196 * January 4, 2004
   1197 
   1198 - Dominick Meglio made the private gettimeofday() become ares_gettimeofday()
   1199   instead in order to not pollute the name space and risk colliding with
   1200   other libraries' versions of this function.
   1201 
   1202 * October 24, 2003. Daniel Stenberg
   1203 
   1204   Added ares_version().
   1205 
   1206 Version 1.0-pre1 (8 October 2003)
   1207 
   1208 - James Bursa made it run on RISC OS
   1209 
   1210 - Dominick Meglio made it run fine on NT4
   1211 
   1212 - Duncan Wilcox made it work fine on Mac OS X
   1213 
   1214 - Daniel Stenberg adjusted the windows port
   1215 
   1216 - liren at vivisimo.com made the initial windows port
   1217 
   1218 * Imported the sources from ares 1.1.1
   1219