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Denis Bilenko committed dbbd5aa

upgrade c-ares to 1.7.5

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+  Changelog for the c-ares project
+
+Version 1.7.5 (August 16, 2011)
+
+Fixed:
+
+ o detection of semicolon comments in resolv.conf
+ o avoid using system's inet_net_pton affected by the WLB-2008080064 advisory
+ o replacement ares_inet_net_pton affected by the WLB-2008080064 advisory
+ o replacement ares_inet_ntop affected by potential out of bounds write
+ o added install target to Makefile.msvc
+ o only fall back to AF_INET searches when looking for AF_UNSPEC addresses
+ o fixed ares_parse_*_reply memory leaks
+ o Use correct sizeof in ares_getnameinfo()
+ o IPv6-on-windows: find DNS servers correctly
+ o man pages: docs for the c-ares utility programs
+ o getservbyport replacement for Win CE
+ o config_sortlist: (win32) missing else
+ o advance_tcp_send_queue: avoid NULL ptr dereference
+ o configure: fix a bashism
+ o ares_expand_name: Fix encoded length for indirect root
+
+Version 1.7.4 (December 9, 2010)
+
+Changed:
+
+ o local-bind: Support binding to local interface/IPs, see
+   ares_set_local_ip4, ares_set_local_ip6, ares_set_local_dev
+
+Fixed:
+
+ o memory leak in ares_getnameinfo
+ o add missing break that caused get_ares_servers to fail
+ o ares_parse_a_reply: fix CNAME response parsing
+ o init_by_options: don't copy an empty sortlist
+ o Replaced uint32_t with unsigned int to fix broken builds
+   on a couple of platforms
+ o Fix lookup with HOSTALIASES set
+ o adig: fix NAPTR parsing
+ o compiler warning cleanups
+
+Version 1.7.3 (June 11, 2010)
+
+Fixed:
+
+ o builds on Android
+ o now includes all files necessary to build it (1.7.2 lacked a file)
+
+Version 1.7.2 (June 10, 2010)
+
+Changed:
+
+ o Added ares_parse_mx_reply()
+
+Fixed:
+
+ o ares_init: Last, not first instance of domain or search should win
+ o improve alternative definition of bool
+ o fix VS2010 compiler warnings
+
+
+Version 1.7.1 (Mar 23, 2010)
+
+* May 31, 2010 (Jakub Hrozek)
+- Use the last instance of domain/search, not the first one
+
+* March 23, 2010 (Daniel Stenberg)
+- We switched from CVS to git. See http://github.com/bagder/c-ares
+
+* March 5, 2010 (Daniel Stenberg)
+- Daniel Johnson provided fixes for building with the clang compiler.
+
+* March 5, 2010 (Yang Tse)
+- Added IPv6 name servers support. Implementation has been based on code,
+  comments and feedback provided November and December of 2008 by Daniel
+  Stenberg, Gregor Jasny, Phil Blundell and myself, December 2009 by Cedric
+  Bail, and February 2010 by Jakub Hrozek on the c-ares mailing list. On
+  March I reviewed all that, selected the best of each, and adjusted or
+  extended parts of it to make the best fit.
+
+  The external and visible result of all this is that two new functions are
+  added to the external API, ares_get_servers() and ares_set_servers(), which
+  becomes now the preferred way of getting and setting name servers for any
+  ares channel as these support both IPv4 and IPv6 name servers.
+
+  In order to not break ABI compatibility, ares_init_options() with option
+  mask ARES_OPT_SERVERS and ares_save_options() may still be used in code
+  which is intended to run on IPv4-only stacks. But remember that these
+  functions do not support IPv6 name servers. This implies that if the user
+  is capable of defining or providing an IPv6 name server, and the app is
+  using ares_init_options() or ares_save_options() at some point to handle
+  the name servers, the app will likely lose IPv6 name servers.
+
+* January 28, 2010 (Daniel Stenberg)
+- Tommie Gannert pointed out a silly bug in ares_process_fd() since it didn't
+  check for broken connections like ares_process() did. Based on that, I
+  merged the two functions into a single generic one with two front-ends.
+
+* December 29, 2009 (Yang Tse)
+- Laszlo Tamas Szabo adjusted Makefile.msvc compiler options so that where
+  run-time error checks enabling compiler option /GZ was used it is replaced
+  with equivalent /RTCsu for Visual Studio 2003 and newer versions. Option
+  /GX is replaced with equivalent /EHsc for all versions. Also fixed socket
+  data type for internal configure_socket function.
+
+* December 21, 2009 (Yang Tse)
+- Ingmar Runge noticed that Windows config-win32.h configuration file
+  did not include a definition for HAVE_CLOSESOCKET which resulted in
+  function close() being inappropriately used to close sockets.
+
+Version 1.7.0 (Nov 30, 2009)
+
+* November 26, 2009 (Yang Tse)
+- Larry Lansing fixed ares_parse_srv_reply to properly parse replies
+  which might contain non-SRV answers, skipping over potential non-SRV
+  ones such as CNAMEs.
+
+* November 23, 2009 (Yang Tse)
+- Changed naming convention for c-ares libraries built with MSVC, details
+  and build instructions provided in README.msvc file.
+
+* November 22, 2009 (Yang Tse)
+- Jakub Hrozek fixed more function prototypes in man pages to sync them
+  with the ones declared in ares.h
+
+- Jakub Hrozek renamed addrttl and addr6ttl structs to ares_addrttl and
+  ares_addr6ttl in order to prevent name space pollution, along with
+  necessary changes to code base and man pages.This change does not break
+  ABI, there is no need to recompile existing applications. But existing
+  applications using these structs with the old name will need source code
+  adjustments when recompiled using c-ares 1.7.0.
+
+* November 21, 2009 (Yang Tse)
+- Added manifest stuff to Makefile.msvc.
+
+* November 20, 2009 (Yang Tse)
+- Fixed several function prototypes in man pages that were out of sync
+  with the ones declared in ares.h.  Added ares_free_data() along with
+  man page.  Updated ares_parse_srv_reply() and ares_parse_txt_reply()
+  with changes from Jakub Hrozek making these now return linked lists
+  instead of arrays, and merging the ares_free_data() adjustments.
+
+* November 10, 2009 (Yang Tse)
+- Updated MSVC 6.0 project files to match settings from Makefile.msvc.
+
+* November 9, 2009 (Yang Tse)
+- Makefile.msvc is now the reference method to build c-ares and sample
+  programs with any MSVC compiler or MS Visual Studio version.  If no
+  option or target are specified it builds dynamic and static c-ares
+  libraries in debug and release flavours and also builds all sample
+  programs using each of the different c-ares libraries.
+
+* November 2, 2009 (Yang Tse)
+- Renamed c-ares setup.h to ares_setup.h
+
+* October 31, 2009 (Yang Tse)
+- Symbol hiding configure options are named now --enable-symbol-hiding
+  and --disable-symbol-hiding in an attempt to make them less ambiguous.
+
+* October 30, 2009 (Yang Tse)
+- Many fixes for ares_parse_txt_reply()
+
+* October 29, 2009 (Daniel Stenberg)
+- Jakub Hrozek added ares_parse_txt_reply() for TXT parsing
+
+* October 29, 2009 (Yang Tse)
+- Updated MSVC 6.0 workspace and project files that allows building
+  dynamic and static c-ares libraries in debug and release flavours.
+  Additionally each of the three sample programs is built against
+  each of the four possible c-ares libraries, generating all this
+  a total number of 12 executables and 4 libraries.
+
+* October 28, 2009 (Yang Tse)
+- Initial step towards the ability to reduce c-ares exported symbols
+  when built as a shared library based on the 'visibility' attribute
+  for GNUC and Intel compilers and based on __global for Sun compilers,
+  taking also in account __declspec function decoration for Win32 and
+  Symbian DLL's.
+
+* October 27, 2009 (Yang Tse)
+- Fixed Pelles C Win32 target compilation issues.
+
+* October 23, 2009 (Yang Tse)
+- John Engelhart noticed an unreleased problem relative to a duplicate
+  ARES_ECANCELLED error code value and missing error code description.
+
+* October 7, 2009 (Yang Tse)
+- Overhauled ares__get_hostent() Fixing out of bounds memory overwrite
+  triggered with malformed /etc/hosts file. Improving parsing of /etc/hosts
+  file. Validating requested address family. Ensuring that failures always
+  return a NULL pointer. Adjusting header inclusions.
+
+* October 6, 2009 (Yang Tse)
+- Fix ssize_t redefinition errors on WIN64 reported by Alexey Simak.
+
+* September 29, 2009 (Yang Tse)
+- Make configure script also check if _REENTRANT definition is required to
+  make errno available as a preprocessor macro.
+
+* September 7, 2009 (Yang Tse)
+- Add T_SRV portability check to ares_parse_srv_reply.c
+
+* 4 Sep 2009 (Daniel Stenberg)
+- Jakub Hrozek added ares_parse_srv_reply() for SRV parsing
+
+* 3 Aug 2009 (Daniel Stenberg)
+- Joshua Kwan fixed the init routine to fill in the defaults for stuff that
+  fails to get inited by other means. This fixes a case of when the c-ares
+  init fails when internet access is fone.
+
+- Timo Teras changed the reason code used in the resolve callback done when
+  ares_cancel() is used, to be ARES_ECANCELLED instead of ARES_ETIMEOUT to
+  better allow the callback to know what's happening.
+
+* 14 Jul 2009 (Guenter Knauf)
+- renamed generated config.h to ares_config.h to avoid any future clashes
+  with config.h from other projects.
+
+* June 20 2009 (Yang Tse)
+- Refactor how libraries are checked for connect() function in configure
+  script and check for connect() as it is done for other functions.
+
+* June 19 2009 (Yang Tse)
+- Make sclose() function-like macro definition used to close a socket,
+  now solely based on HAVE_CLOSESOCKET and HAVE_CLOSESOCKET_CAMEL
+  config file preprocessor definitions
+
+* June 18 2009 (Yang Tse)
+- Add CloseSocket camel case function check for configure script.
+
+* June 17 2009 (Yang Tse)
+- Check for socket() and closesocket() as it is done for other functions
+  in configure script.
+
+* June 11 2009 (Yang Tse)
+- Modified buildconf so that when automake runs it copies missing files
+  instead of symlinking them.
+
+* June 8 2009 (Yang Tse)
+- Removed buildconf.bat from release and daily snapshot archives. This
+  file is only for CVS tree checkout builds.
+
+* May 26 2009 (Yang Tse)
+- Added --enable-curldebug configure option to enable and disable building
+  with the low-level curl debug memory tracking 'feature' to allow decoupled
+  setting from --enable-debug, allowing again to build c-ares independently
+  out of the CVS tree.
+
+  For the c-ares library option --enable-debug enables debug build features
+  which are _not_ related with memory tracking. For the c-ares library when
+  --enable-debug is given it does not enable the memory tracking feature. If
+  you wish to enable the curl debug memory tracking you must use configure
+  option --enable-curldebug explicitily to do so.
+
+  Internally, definition of preprocessor symbol DEBUGBUILD restricts code
+  which is only compiled for debug enabled builds. And symbol CURLDEBUG is
+  used to differentiate code which is _only_ used for memory tracking.
+
+  Make ares_init(), ares_dup() and ares_init_options() fail returning
+  ARES_ENOTINITIALIZED if library initialization has not been performed
+  calling ares_library_init().
+
+* May 20 2009 (Yang Tse)
+- Added ares_library_init() and ares_library_cleanup() man pages.
+
+* May 19 2009 (Yang Tse)
+- Introduced ares_library_init() and ares_library_cleanup() functions.
+
+  This is an API and ABI break for Win32/64 systems. Non-Win32/64 build targets
+  using c-ares 1.7.0 can still survive without calling these functions. Read all
+  the details on ares_library_init(3) and ares_library_cleanup(3) man pages that
+  are included.
+
+  curl/libcurl 7.19.5 is fully compatible with c-ares 1.7.0 on all systems.
+
+  In order to use c-ares 1.7.0 with curl/libcurl on Win32/64 systems it is
+  required that curl/libcurl is 7.19.5 or newer. In other words, it is not
+  possible on Win32/64 to use c-ares 1.7.0 with a curl/libcurl version less
+  than 7.19.5
+
+* May 11 2009 (Daniel Stenberg)
+- Gregor Jasny made c-ares link with libtool 's -export-symbols-regex option to
+  only expose functions starting with ares_.
+
+* May 7 2009 (Yang Tse)
+- Fix an m4 overquoting triggering a spurious 'AS_TR_CPP' symbol definition
+  attempt in generated config.h
+
+* May 2 2009 (Yang Tse)
+- Use a build-time configured ares_socklen_t data type instead of socklen_t.
+
+* April 21 2009 (Yang Tse)
+- Moved potential inclusion of system's malloc.h and memory.h header files to
+  setup_once.h.  Inclusion of each header file is based on the definition of
+  NEED_MALLOC_H and NEED_MEMORY_H respectively.
+
+* March 11 2009 (Yang Tse)
+- Japheth Cleaver fixed acountry.c replacing u_long with unsigned long.
+
+* February 20 2009 (Yang Tse)
+- Do not halt compilation when using VS2008 to build a Windows 2000 target.
+
+* February 3 2009 (Phil Blundell)
+- If the server returns garbage or nothing at all in response to an AAAA query,
+  go on and ask for A records anyway.
+
+* January 31 2009 (Daniel Stenberg)
+- ares_gethostbyname() now accepts 'AF_UNSPEC' as a family for resolving
+  either AF_INET6 or AF_INET. It works by accepting any of the looksups in the
+  hosts file, and it resolves the AAAA field with a fallback to A.
+
+* January 14 2009 (Daniel Stenberg)
+- ares.h no longer uses the HAVE_STRUCT_IN6_ADDR define check, but instead it
+  now declares the private struct ares_in6_addr for all systems instead of
+  relying on one possibly not present in the system.
+
+* January 13 2009 (Phil Blundell)
+- ares__send_query() now varies the retry timeout pseudo-randomly to avoid
+  packet storms when several queries were started at the same time.
+
+* January 11 2009 (Daniel Stenberg)
+- Phil Blundell added the internal function ares__expand_name_for_response()
+  that is now used by the ares_parse_*_reply() functions instead of the
+  ares_expand_name() simply to easier return ARES_EBADRESP for the cases where
+  the name expansion fails as in responses that really isn't expected.
+
+Version 1.6.0 (Dec 9, 2008)
+
+* December 9 2008 (Gisle Vanem)
+
+  Fixes for Win32 targets using the Watt-32 tcp/ip stack.
+
+* Dec 4 2008 (Daniel Stenberg)
+
+  Gregor Jasny provided the patch that introduces ares_set_socket_callback(),
+  and I edited it to also get duped by ares_dup().
+
+* Dec 3 2008 (Daniel Stenberg)
+
+  API changes:
+
+  I made sure the public ares_config struct looks like before and yet it
+  supports the ROTATE option thanks to c-ares now storing the "optmask"
+  internally. Thus we should be ABI compatible with the past release(s)
+  now. My efforts mentioned below should not break backwards ABI compliance.
+
+  Here's how I suggest we proceed with the API:
+
+  ares_init() will be primary "channel creator" function.
+
+  ares_init_options() will continue to work exactly like now and before. For
+  starters, it will be the (only) way to set the existing options.
+
+  ares_save_options() will continue to work like today, but will ONLY save
+  options that you can set today (including ARES_OPT_ROTATE actually) but new
+  options that we add may not be saved with this.
+
+  Instead we introduce:
+
+  ares_dup() that instead can make a new channel and clone the config used
+  from an existing channel. It will then clone all config options, including
+  future new things we add.
+
+  ares_set_*() style functions that set (new) config options. As a start we
+  simply add these for new functionality, but over time we can also introduce
+  them for existing "struct ares_options" so that we can eventually deprecate
+  the two ares_*_options() functions.
+
+  ares_get_*() style functions for extracting info from a channel handle that
+  should be used instead of ares_save_options().
+
+* Nov 26 2008 (Yang Tse)
+- Brad Spencer provided changes to allow buildconf to work on OS X.
+
+- Gerald Combs fixed a bug in ares_parse_ptr_reply() which would cause a
+  buffer to shrink instead of expand if a reply contained 8 or more records.
+
+* Nov 25 2008 (Yang Tse)
+- In preparation for the upcomming IPv6 nameservers patch, the internal
+  ares_addr union is now changed into an internal struct which also holds
+  the address family.
+
+* Nov 19 2008 (Daniel Stenberg)
+- Brad Spencer brought the new function ares_gethostbyname_file() which simply
+  resolves a host name from the given file, using the regular hosts syntax.
+
+* Nov 1 2008 (Daniel Stenberg)
+- Carlo Contavalli added support for the glibc "rotate" option, as documented
+  in man resolv.conf:
+
+  causes round robin selection of nameservers from among those listed.  This
+  has the effect of spreading the query load among all listed servers, rather
+  than having all clients try the first listed server first every time.
+
+  You can enable it with ARES_OPT_ROTATE
+
+* Oct 21 2008 (Yang Tse)
+  Charles Hardin added handling of EINPROGRESS for UDP connects.
+
+* Oct 18 2008 (Daniel Stenberg)
+  Charles Hardin made adig support a regular numerical dotted IP address for the
+  -s option as well.
+
+* Oct 7 2008 (Yang Tse)
+- Added --enable-optimize configure option to enable and disable compiler
+  optimizations to allow decoupled setting from --enable-debug.
+
+* Oct 2 2008 (Yang Tse)
+- Added --enable-warnings configure option to enable and disable strict
+  compiler warnings to allow decoupled setting from --enable-debug.
+
+* Sep 17 2008 (Yang Tse)
+- Code reorganization to allow internal/private use of "nameser.h" to any
+  system that lacks arpa/nameser.h or arpa/nameser_compat.h header files.
+
+* Sep 16 2008 (Yang Tse)
+- Code reorganization to allow internal/private use of ares_writev to any
+  system that lacks the writev function.
+
+* Sep 15 2008 (Yang Tse)
+- Code reorganization to allow internal/private use of ares_strcasecmp to any
+  system that lacks the strcasecmp function.
+
+- Improve configure detection of some string functions.
+
+* Sep 11 2008 (Yang Tse)
+- Code reorganization to allow internal/private use of ares_strdup to any
+  system that lacks the strdup function.
+
+Version 1.5.3 (Aug 29, 2008)
+
+* Aug 25 2008 (Yang Tse)
+- Improvement by Brad House:
+
+  This patch addresses an issue in which a response could be sent back to the
+  source port of a client from a different address than the request was made to.
+  This is one form of a DNS cache poisoning attack.
+
+  The patch simply uses recvfrom() rather than recv() and validates that the
+  address returned from recvfrom() matches the address of the server we have
+  connected to. Only necessary on UDP sockets as they are connection-less, TCP
+  is unaffected.
+
+- Fix by George Neill:
+  Fixed compilation of acountry sample application failure on some systems.
+
+* Aug 4 2008 (Daniel Stenberg)
+- Fix by Tofu Linden:
+
+  The symptom:
+  * Users (usually, but not always) on 2-Wire routers and the Comcast service
+  and a wired connection to their router would find that the second and
+  subsequent DNS lookups from fresh processes using c-ares to resolve the same
+  address would cause the process to never see a reply (it keeps polling for
+  around 1m15s before giving up).
+
+  The repro:
+  * On such a machine (and yeah, it took us a lot of QA to find the systems
+  that reproduce such a specific problem!), do 'ahost www.secondlife.com',
+  then do it again.  The first process's lookup will work, subsequent lookups
+  will time-out and fail.
+
+  The cause:
+  * init_id_key() was calling randomize_key() *before* it initialized
+  key->state, meaning that the randomness generated by randomize_key() is
+  immediately overwritten with deterministic values. (/dev/urandom was also
+  being read incorrectly in the c-ares version we were using, but this was
+  fixed in a later version.)
+  * This makes the stream of generated query-IDs from any new c-ares process
+  be an identical and predictable sequence of IDs.
+  * This makes the 2-Wire's default built-in DNS server detect these queries
+  as probable-duplicates and (erroneously) not respond at all.
+
+
+* Aug 4 2008 (Yang Tse)
+- Autoconf 2.62 has changed the behaviour of the AC_AIX macro which we use.
+  Prior versions of autoconf defined _ALL_SOURCE if _AIX was defined. 2.62
+  version of AC_AIX defines _ALL_SOURCE and other four preprocessor symbols
+  no matter if the system is AIX or not. To keep the traditional behaviour,
+  and an uniform one across autoconf versions AC_AIX is replaced with our
+  own internal macro CARES_CHECK_AIX_ALL_SOURCE.
+
+* Aug 1 2008 (Yang Tse)
+- Configure process now checks if the preprocessor _REENTRANT symbol is already
+  defined. If it isn't currently defined a set of checks are performed to test
+  if its definition is required to make visible to the compiler a set of *_r
+  functions. Finally, if _REENTRANT is already defined or needed it takes care
+  of making adjustments necessary to ensure that it is defined equally for the
+  configure process tests and generated config file.
+
+* Jul 20 2008 (Yang Tse)
+- When recvfrom prototype uses a void pointer for arguments 2, 5 or 6 this will
+  now cause the definition, as appropriate, of RECVFROM_TYPE_ARG2_IS_VOID,
+  RECVFROM_TYPE_ARG5_IS_VOID or RECVFROM_TYPE_ARG6_IS_VOID.
+
+* Jul 17 2008 (Yang Tse)
+- RECVFROM_TYPE_ARG2, RECVFROM_TYPE_ARG5 and RECVFROM_TYPE_ARG6 are now defined
+  to the data type pointed by its respective argument and not the pointer type.
+
+* Jul 16 2008 (Yang Tse)
+- Improved configure detection of number of arguments for getservbyport_r.
+  Detection is now based on compilation checks instead of linker ones.
+
+- Configure process now checks availability of recvfrom() socket function and
+  finds out its return type and the types of its arguments. Added definitions
+  for non-configure systems config files, and introduced macro sreadfrom which
+  will be used on udp sockets as a recvfrom() wrapper in the future.
+
+* Jul 15 2008 (Yang Tse)
+- Introduce definition of _REENTRANT symbol in setup.h to improve library
+  usability.  Previously the configure process only used the AC_SYS_LARGEFILE
+  macro for debug builds, now it is also used for non-debug ones enabling the
+  use of configure options --enable-largefile and --disable-largefile which
+  might be needed for library compatibility.  Remove checking the size of
+  curl_off_t, it is no longer needed.
+
+* Jul 3 2008 (Daniel Stenberg)
+- Phil Blundell: If you ask ares_gethostbyname() to do an AF_INET6 lookup and
+  the target host has only A records, it automatically falls back to an
+  AF_INET lookup and gives you the A results.  However, if the target host has
+  a CNAME record, this behaviour is defeated since the original query does
+  return some data even though ares_parse_aaa_reply() doesn't consider it
+  relevant. Here's a small patch to make it behave the same with and without
+  the CNAME.
+
+* Jul 2 2008 (Yang Tse)
+- Fallback to gettimeofday when monotonic clock is unavailable at run-time.
+
+* Jun 30 2008 (Daniel Stenberg)
+
+- As was pointed out to me by Andreas Schuldei, the MAXHOSTNAMELEN define is
+  not posix or anything and thus c-ares failed to build on hurd (and possibly
+  elsewhere). The define was also somewhat artificially used in the windows
+  port. Now, I instead rewrote the use of gethostbyname to enlarge the host
+  name buffer in case of need and totally avoid the use of the MAXHOSTNAMELEN
+  define. I thus also removed the defien from the namser.h file where it was
+  once added for the windows build.
+
+  I also fixed init_by_defaults() function to not leak memory in case if
+  error.
+
+* Jun 9 2008 (Yang Tse)
+
+- Make libcares.pc generated file for pkg-config include information relative
+  to the libraries needed for the static linking of c-ares.
+
+* May 30 2008 (Yang Tse)
+
+- Brad House fixed a missing header file inclusion in adig sample program.
+
+Version 1.5.2 (May 29, 2008)
+
+* May 13 2008 (Daniel Stenberg)
+
+- Introducing millisecond resolution support for the timeout option. See
+  ares_init_options()'s ARES_OPT_TIMEOUTMS.
+
+* May 9 2008 (Yang Tse)
+
+- Use monotonic time source if available, for private function ares__tvnow()
+
+* May 7 2008 (Daniel Stenberg)
+
+- Sebastian made c-ares able to return all PTR-records when doing reverse
+  lookups. It is not common practice to have multiple PTR-Records for a single
+  IP, but its perfectly legal and some sites have those.
+
+- Doug Goldstein provided a configure patch: updates autoconf 2.13 usage to
+  autoconf 2.57 usage (which is the version you have specified as the minimum
+  version). It's a minor change but it does clean up some warnings with newer
+  autoconf (specifically 2.62).
+
+* May 5 2008 (Yang Tse)
+
+- Improved parsing of resolver configuration files.
+
+* April 4 2008 (Daniel Stenberg)
+
+- Eino Tuominen improved the code when a file is used to seed the randomizer.
+
+- Alexey Simak made adig support NAPTR records
+
+- Alexey Simak fixed the VC dsp file by adding the missing source file
+  ares_expand_string.c
+
+* December 11 2007 (Gisle Vanem)
+
+- Added another sample application; acountry.c which converts an
+  IPv4-address(es) and/or host-name(s) to country-name and country-code.
+  This uses the service of the DNSBL at countries.nerd.dk.
+
+* December 3 2007 (Daniel Stenberg)
+
+- Brad Spencer fixed the configure script to assume that there's no
+  /dev/urandom when built cross-compiled as then the script cannot check for
+  it.
+
+- Erik Kline cleaned up ares_gethostbyaddr.c:next_lookup() somewhat
+
+Version 1.5.1 (Nov 21, 2007)
+
+* November 21 2007 (Daniel Stenberg)
+
+- Robin Cornelius pointed out that ares_llist.h was missing in the release
+  archive for 1.5.0
+
+Version 1.5.0 (Nov 21, 2007)
+
+* October 2 2007 (Daniel Stenberg)
+
+- ares_strerror() segfaulted if the input error number was out of the currently
+  supported range.
+
+- Yang Tse: Avoid a segfault when generating a DNS "Transaction ID" in
+  internal function init_id_key() under low memory conditions.
+
+* September 28 2007 (Daniel Stenberg)
+
+- Bumped version to 1.5.0 for next release and soname bumped to 2 due to ABI
+  and API changes in the progress callback (and possibly more coming up from
+  Steinar)
+
+* September 28 2007 (Steinar H. Gunderson)
+
+- Don't skip a server if it's the only one. (Bugfix from the Google tree.)
+
+- Made the query callbacks receive the number of timeouts that happened during
+  the execution of a query, and updated documentation accordingly. (Patch from
+  the Google tree.)
+
+- Support a few more socket options: ARES_OPT_SOCK_SNDBUF and
+  ARES_OPT_SOCK_RCVBUF
+
+- Always register for TCP events even if there are no outstanding queries, as
+  the other side could always close the connection, which is a valid event
+  which should be responded to.
+
+* September 22 2007 (Daniel Stenberg)
+
+- Steinar H. Gunderson fixed: Correctly clear sockets from the fd_set on in
+  several functions (write_tcp_data, read_tcp_data, read_udp_packets) so that
+  if it fails and the socket is closed the following code doesn't try to use
+  the file descriptor.
+
+- Steinar H. Gunderson modified c-ares to now also do to DNS retries even when
+  TCP is used since there are several edge cases where it still makes sense.
+
+- Brad House provided a fix for ares_save_options():
+
+  Apparently I overlooked something with the ares_save_options() where it
+  would try to do a malloc(0) when no options of that type needed to be saved.
+  On most platforms, this was fine because malloc(0) doesn't actually return
+  NULL, but on AIX it does, so ares_save_options would return ARES_ENOMEM.
+
+* July 14 2007 (Daniel Stenberg)
+
+- Vlad Dinulescu fixed two outstanding valgrind reports:
+
+  1. In ares_query.c , in find_query_by_id we compare q->qid (which is a short
+  int variable) with qid, which is declared as an int variable.  Moreover,
+  DNS_HEADER_SET_QID is used to set the value of qid, but DNS_HEADER_SET_QID
+  sets only the first two bytes of qid. I think that qid should be declared as
+  "unsigned short" in this function.
+
+  2. The same problem occurs in ares_process.c, process_answer() .  query->qid
+  (an unsigned short integer variable) is compared with id, which is an
+  integer variable. Moreover, id is initialized from DNS_HEADER_QID which sets
+  only the first two bytes of id. I think that the id variable should be
+  declared as "unsigned short" in this function.
+
+  Even after declaring these variables as "unsigned short", the valgrind
+  errors are still there. Which brings us to the third problem.
+
+  3. The third problem is that Valgrind assumes that query->qid is not
+  initialised correctly. And it does that because query->qid is set from
+  DNS_HEADER_QID(qbuf); Valgrind says that qbuf has unitialised bytes. And
+  qbuf has uninitialised bytes because of channel->next_id . And next_id is
+  set by ares_init.c:ares__generate_new_id() . I found that putting short r=0
+  in this function (instead of short r) makes all Valgrind warnings go away.
+  I have studied ares__rc4() too, and this is the offending line:
+
+        buffer_ptr[counter] ^= state[xorIndex];   (ares_query.c:62)
+
+  This is what triggers Valgrind.. buffer_ptr is unitialised in this function,
+  and by applying ^= on it, it remains unitialised.
+
+Version 1.4.0 (June 8, 2007)
+
+* June 4 2007 (Daniel Stenberg)
+
+- James Bursa reported a major memory problem when resolving multi-IP names
+  and I found and fixed the problem. It was added by Ashish Sharma's patch
+  two days ago.
+
+  When I then tried to verify multiple entries in /etc/hosts after my fix, I
+  got another segfault and decided this code was not ripe for inclusion and I
+  reverted the patch.
+
+* June 2 2007
+
+- Brad Spencer found and fixed three flaws in the code, found with the new
+  gcc 4.2.0 warning: -Waddress
+
+- Brad House fixed VS2005 compiler warnings due to time_t being 64bit.
+  He also made recent Microsoft compilers use _strdup() instead of strdup().
+
+- Brad House's man pages for ares_save_options() and ares_destroy_options()
+  were added.
+
+- Ashish Sharma provided a patch for supporting multiple entries in the
+  /etc/hosts file. Patch edited for coding style and functionality by me
+  (Daniel).
+
+* May 30 2007
+
+- Shmulik Regev brought cryptographically secure transaction IDs:
+
+  The c-ares library implementation uses a DNS "Transaction ID" field that is
+  seeded with a pseudo random number (based on gettimeofday) which is
+  incremented (++) between consecutive calls and is therefore rather
+  predictable. In general, predictability of DNS Transaction ID is a well
+  known security problem (e.g.
+  http://bak.spc.org/dms/archive/dns_id_attack.txt) and makes a c-ares based
+  implementation vulnerable to DNS poisoning. Credit goes to Amit Klein
+  (Trusteer) for identifying this problem.
+
+  The patch I wrote changes the implementation to use a more secure way of
+  generating unique IDs. It starts by obtaining a key with reasonable entropy
+  which is used with an RC4 stream to generate the cryptographically secure
+  transaction IDs.
+
+  Note that the key generation code (in ares_init:randomize_key) has two
+  versions, the Windows specific one uses a cryptographically safe function
+  provided (but undocumented :) by the operating system (described at
+  http://blogs.msdn.com/michael_howard/archive/2005/01/14/353379.aspx).  The
+  default implementation is a bit naive and uses the standard 'rand'
+  function. Surely a better way to generate random keys exists for other
+  platforms.
+
+  The patch can be tested by using the adig utility and using the '-s' option.
+
+- Brad House added ares_save_options() and ares_destroy_options() that can be
+  used to keep options for later re-usal when ares_init_options() is used.
+
+  Problem: Calling ares_init() for each lookup can be unnecessarily resource
+         intensive.  On windows, it must LoadLibrary() or search the registry
+         on each call to ares_init().  On unix, it must read and parse
+         multiple files to obtain the necessary configuration information.  In
+         a single-threaded environment, it would make sense to only
+         ares_init() once, but in a heavily multi-threaded environment, it is
+         undesirable to ares_init() and ares_destroy() for each thread created
+         and track that.
+
+  Solution: Create ares_save_options() and ares_destroy_options() functions to
+         retrieve and free options obtained from an initialized channel.  The
+         options populated can be used to pass back into ares_init_options(),
+         it should populate all needed fields and not retrieve any information
+         from the system.  Probably wise to destroy the cache every minute or
+         so to prevent the data from becoming stale.
+
+- Daniel S added ares_process_fd() to allow applications to ask for processing
+  on specific sockets and thus avoiding select() and associated
+  functions/macros.  This function will be used by upcoming libcurl releases
+  for this very reason. It also made me export the ares_socket_t type in the
+  public ares.h header file, since ares_process_fd() uses that type for two of
+  the arguments.
+
+* May 25 2007
+
+- Ravi Pratap fixed a flaw in the init_by_resolv_conf() function for windows
+  that could cause it to return a bad return code.
+
+* April 16 2007
+
+- Yang Tse: Provide ares_getopt() command-line parser function as a source
+  code helper function, not belonging to the actual c-ares library.
+
+* February 19 2007
+
+- Vlad Dinulescu added ares_parse_ns_reply().
+
+* February 13 2007
+
+- 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 2006
+
+- 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 2006
+
+- 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 127.0.0.1 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
+  ares__send_query().
+
+* 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
+  OS X.
+
+* 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
+  file:
+  http://www.microsoft.com/technet/itsolutions/network/deploy/depovg/tcpip2k.mspx
+
+  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
+  more.
+
+* 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!)
+
+- Makefile.am now uses Makefile.inc for the c sources, h headers and man
+  pages, to make it easier for other makefiles to use the exact same set of
+  files.
+
+- Adjusted 'maketgz' to use the new automake magic when building distribution
+  archives.
+
+- Anyone desires HTML and/or PDF versions of the man pages in the release
+  archives?
+
+* July 3
+- G�nter Knauf made c-ares build and run on Novell Netware.
+
+* July 1
+- Gisle Vanem provided Makefile.dj 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
+  site.
+
+* 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 Makefile.in 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
+  reported
+
+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 vivisimo.com made the initial windows port
+
+* Imported the sources from ares 1.1.1
 
 /* Copyright 1998, 2009 by the Massachusetts Institute of Technology.
- * Copyright (C) 2007-2010 by Daniel Stenberg
+ * Copyright (C) 2007-2011 by Daniel Stenberg
  *
  * Permission to use, copy, modify, and distribute this
  * software and its documentation for any purpose and without
 #  include <netinet/in.h>
 #  include <sys/socket.h>
 #  include <tcp.h>
+#elif defined(_WIN32_WCE)
+#  ifndef WIN32_LEAN_AND_MEAN
+#    define WIN32_LEAN_AND_MEAN
+#  endif
+#  include <windows.h>
+#  include <winsock.h>
 #elif defined(WIN32)
 #  ifndef WIN32_LEAN_AND_MEAN
 #    define WIN32_LEAN_AND_MEAN

c-ares/ares_config.h.in

 /* Define to 1 if the getaddrinfo function is threadsafe. */
 #undef HAVE_GETADDRINFO_THREADSAFE
 
+/* Define to 1 if you have the getenv function. */
+#undef HAVE_GETENV
+
 /* Define to 1 if you have the gethostbyaddr function. */
 #undef HAVE_GETHOSTBYADDR
 
 /* Define to 1 if you have the `if_indextoname' function. */
 #undef HAVE_IF_INDEXTONAME
 
-/* Define to 1 if you have the `inet_net_pton' function. */
+/* Define to 1 if you have a IPv6 capable working inet_net_pton function. */
 #undef HAVE_INET_NET_PTON
 
-/* Define to 1 if inet_net_pton supports IPv6. */
-#undef HAVE_INET_NET_PTON_IPV6
-
 /* Define to 1 if you have a IPv6 capable working inet_ntop function. */
 #undef HAVE_INET_NTOP
 
 /* a suitable file/device to read random data from */
 #undef RANDOM_FILE
 
+/* Define to the type qualifier pointed by arg 5 for recvfrom. */
+#undef RECVFROM_QUAL_ARG5
+
 /* Define to the type of arg 1 for recvfrom. */
 #undef RECVFROM_TYPE_ARG1
 

c-ares/ares_data.h

-#ifndef ARES_DATA_H
-#define ARES_DATA_H
 
 /* Copyright (C) 2009-2010 by Daniel Stenberg
  *
 void *ares_malloc_data(ares_datatype type);
 
 ares_datatype ares_get_datatype(void * dataptr);
-
-#endif

c-ares/ares_expand_name.c

      * Since this function strips trailing dots though, it becomes ""
      */
     q[0] = '\0';
-    *enclen = 1;  /* the caller should move one byte to get past this */
+
+    /* indirect root label (like 0xc0 0x0c) is 2 bytes long (stupid, but
+       valid) */
+    if ((*encoded & INDIR_MASK) == INDIR_MASK)
+      *enclen = 2;
+    else
+      *enclen = 1;  /* the caller should move one byte to get past this */
+
     return ARES_SUCCESS;
   }
 

c-ares/ares_free_hostent.c

 {
   char **p;
 
+  if (!host)
+    return;
+
   free((char *)(host->h_name));
   for (p = host->h_aliases; *p; p++)
     free(*p);

c-ares/ares_getenv.h

+#ifndef HEADER_CARES_GETENV_H
+#define HEADER_CARES_GETENV_H
+
+
+/* Copyright 1998 by the Massachusetts Institute of Technology.
+ *
+ * Permission to use, copy, modify, and distribute this
+ * software and its documentation for any purpose and without
+ * fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in
+ * advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ */
+
+#include "ares_setup.h"
+
+#ifndef HAVE_GETENV
+extern char *ares_getenv(const char *name);
+#endif
+
+#endif /* HEADER_CARES_GETENV_H */

c-ares/ares_gethostbyaddr.c

 
 #include "ares.h"
 #include "inet_net_pton.h"
+#include "ares_platform.h"
 #include "ares_private.h"
 
 #ifdef WATT32
   int timeouts;
 };
 
-static void gethostbyaddr_next_lookup(struct addr_query *aquery);
+static void next_lookup(struct addr_query *aquery);
 static void addr_callback(void *arg, int status, int timeouts,
                           unsigned char *abuf, int alen);
 static void end_aquery(struct addr_query *aquery, int status,
                        struct hostent *host);
-static int gethostbyaddr_file_lookup(struct ares_addr *addr, struct hostent **host);
+static int file_lookup(struct ares_addr *addr, struct hostent **host);
 static void ptr_rr_name(char *name, const struct ares_addr *addr);
 
 void ares_gethostbyaddr(ares_channel channel, const void *addr, int addrlen,
   aquery->remaining_lookups = channel->lookups;
   aquery->timeouts = 0;
 
-  gethostbyaddr_next_lookup(aquery);
+  next_lookup(aquery);
 }
 
-static void gethostbyaddr_next_lookup(struct addr_query *aquery)
+static void next_lookup(struct addr_query *aquery)
 {
   const char *p;
   char name[128];
                      aquery);
           return;
         case 'f':
-          status = gethostbyaddr_file_lookup(&aquery->addr, &host);
+          status = file_lookup(&aquery->addr, &host);
 
           /* this status check below previously checked for !ARES_ENOTFOUND,
              but we should not assume that this single error code is the one
   else if (status == ARES_EDESTRUCTION)
     end_aquery(aquery, status, NULL);
   else
-    gethostbyaddr_next_lookup(aquery);
+    next_lookup(aquery);
 }
 
 static void end_aquery(struct addr_query *aquery, int status,
   free(aquery);
 }
 
-static int gethostbyaddr_file_lookup(struct ares_addr *addr, struct hostent **host)
+static int file_lookup(struct ares_addr *addr, struct hostent **host)
 {
   FILE *fp;
   int status;
 
 #ifdef WIN32
   char PATH_HOSTS[MAX_PATH];
-  if (IS_NT()) {
+  win_platform platform;
+
+  PATH_HOSTS[0] = '\0';
+
+  platform = ares__getplatform();
+
+  if (platform == WIN_NT) {
     char tmp[MAX_PATH];
     HKEY hkeyHosts;
 
       RegCloseKey(hkeyHosts);
     }
   }
+  else if (platform == WIN_9X)
+    GetWindowsDirectory(PATH_HOSTS, MAX_PATH);
   else
-    GetWindowsDirectory(PATH_HOSTS, MAX_PATH);
+    return ARES_ENOTFOUND;
 
   strcat(PATH_HOSTS, WIN_PATH_HOSTS);
 

c-ares/ares_gethostbyname.c

 #include "ares.h"
 #include "inet_net_pton.h"
 #include "bitncmp.h"
+#include "ares_platform.h"
 #include "ares_private.h"
 
 #ifdef WATT32
       else if (hquery->sent_family == AF_INET6)
         {
           status = ares_parse_aaaa_reply(abuf, alen, &host, NULL, NULL);
-          if (hquery->want_family == AF_UNSPEC && (status == ARES_ENODATA || status == ARES_EBADRESP)) {
+          if ((status == ARES_ENODATA || status == ARES_EBADRESP) &&
+               hquery->want_family == AF_UNSPEC) {
             /* The query returned something but either there were no AAAA
                records (e.g. just CNAME) or the response was malformed.  Try
-               looking up A instead.  We should possibly limit this
-               attempt-next logic to AF_UNSPEC lookups only. */
+               looking up A instead. */
             hquery->sent_family = AF_INET;
             ares_search(hquery->channel, hquery->name, C_IN, T_A,
                         host_callback, hquery);
       end_hquery(hquery, status, host);
     }
   else if ((status == ARES_ENODATA || status == ARES_EBADRESP ||
-            status == ARES_ETIMEOUT) && hquery->sent_family == AF_INET6 && hquery->want_family == AF_UNSPEC)
+            status == ARES_ETIMEOUT) && (hquery->sent_family == AF_INET6 &&
+            hquery->want_family == AF_UNSPEC))
     {
-      /* The AAAA query yielded no useful result.  Now look up an A instead.
-         We should possibly limit this attempt-next logic to AF_UNSPEC lookups
-         only. */
+      /* The AAAA query yielded no useful result.  Now look up an A instead. */
       hquery->sent_family = AF_INET;
       ares_search(hquery->channel, hquery->name, C_IN, T_A, host_callback,
                   hquery);
 
 #ifdef WIN32
   char PATH_HOSTS[MAX_PATH];
-  if (IS_NT()) {
+  win_platform platform;
+
+  PATH_HOSTS[0] = '\0';
+
+  platform = ares__getplatform();
+
+  if (platform == WIN_NT) {
     char tmp[MAX_PATH];
     HKEY hkeyHosts;
 
       RegCloseKey(hkeyHosts);
     }
   }
+  else if (platform == WIN_9X)
+    GetWindowsDirectory(PATH_HOSTS, MAX_PATH);
   else
-    GetWindowsDirectory(PATH_HOSTS, MAX_PATH);
+    return ARES_ENOTFOUND;
 
   strcat(PATH_HOSTS, WIN_PATH_HOSTS);
 

c-ares/ares_getnameinfo.c

 #include "ares.h"
 #include "ares_ipv6.h"
 #include "inet_ntop.h"
+#include "ares_nowarn.h"
 #include "ares_private.h"
 
 struct nameinfo_query {
         if (sa->sa_family == AF_INET)
           {
             niquery->family = AF_INET;
-            memcpy(&niquery->addr.addr4, addr, sizeof(struct sockaddr_in));
+            memcpy(&niquery->addr.addr4, addr, sizeof(struct in_addr));
             ares_gethostbyaddr(channel, &addr->sin_addr,
                                sizeof(struct in_addr), AF_INET,
                                nameinfo_callback, niquery);
         else
           {
             niquery->family = AF_INET6;
-            memcpy(&niquery->addr.addr6, addr6, sizeof(struct sockaddr_in6));
+            memcpy(&niquery->addr.addr6, addr6, sizeof(struct ares_in6_addr));
             ares_gethostbyaddr(channel, &addr6->sin6_addr,
                                sizeof(struct ares_in6_addr), AF_INET6,
                                nameinfo_callback, niquery);

c-ares/ares_init.c

 
 /* Copyright 1998 by the Massachusetts Institute of Technology.
- * Copyright (C) 2007-2010 by Daniel Stenberg
+ * Copyright (C) 2007-2011 by Daniel Stenberg
  *
  * Permission to use, copy, modify, and distribute this
  * software and its documentation for any purpose and without
 
 #include "ares_setup.h"
 
-#ifdef USE_WINSOCK
-#include <iphlpapi.h>
-#endif
-
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
 #endif
 #include <string.h>
 #include <ctype.h>
 #include <time.h>
-#include <errno.h>
+
+#ifdef ANDROID
+#include <sys/system_properties.h>
+#endif
+
 #include "ares.h"
 #include "inet_net_pton.h"
 #include "ares_library_init.h"
 #include "ares_nowarn.h"
+#include "ares_platform.h"
+#include "inet_ntop.h"
 #include "ares_private.h"
 
-#ifdef ANDROID
-#include <sys/system_properties.h>
-#endif
-
 #ifdef WATT32
 #undef WIN32  /* Redefined in MingW/MSVC headers */
 #endif
                          const char *bindch, const char *filech);
 static int config_sortlist(struct apattern **sortlist, int *nsort,
                            const char *str);
-static char *try_config(char *s, const char *opt);
+static char *try_config(char *s, const char *opt, char scc);
 #endif
 
 #define ARES_CONFIG_CHECK(x) (x->lookups && x->nsort > -1 && \
         ipv4_nservers++;
     }
     if (ipv4_nservers) {
-      options->servers = malloc(ipv4_nservers * sizeof(struct server_state));
+      options->servers = malloc(ipv4_nservers * sizeof(struct in_addr));
       if (!options->servers)
         return ARES_ENOMEM;
       for (i = j = 0; i < channel->nservers; i++)
   return 0;
 }
 
+/**
+ * The desired output for this method is that we set "ret_buf" to
+ * something like:
+ *
+ * 192.168.0.1,dns01.my.domain,fe80::200:f8ff:fe21:67cf
+ *
+ * The only ordering requirement is that primary servers are listed
+ * before secondary. There is no requirement that IPv4 addresses should
+ * necessarily be before IPv6.
+ *
+ * Note that ret_size should ideally be big enough to hold around
+ * 2-3 IPv4 and 2-3 IPv6 addresses.
+ *
+ * Finally, we need to return the total number of DNS servers located.
+ */
 static int get_iphlpapi_dns_info (char *ret_buf, size_t ret_size)
 {
-  FIXED_INFO    *fi, *newfi;
-  DWORD          size = sizeof (*fi);
-  IP_ADDR_STRING *ipAddr;
-  int            i, count = 0;
-  int            debug  = 0;
-  size_t         ip_size = sizeof("255.255.255.255,")-1;
-  size_t         left = ret_size;
-  char          *ret = ret_buf;
-  HRESULT        res;
+  const size_t  ipv4_size = INET_ADDRSTRLEN  + 1;  /* +1 for ',' at end */
+  const size_t  ipv6_size = INET6_ADDRSTRLEN + 12; /* +12 for "%0123456789," at end */
+  size_t        left = ret_size;
+  char         *ret  = ret_buf;
+  int           count = 0;
 
-  fi = malloc(size);
-  if (!fi)
-     return 0;
+  /* Use the GetAdaptersAddresses method if it's available, otherwise
+     fall back to GetNetworkParams. */
+  if (ares_fpGetAdaptersAddresses != ZERO_NULL)
+  {
+    const ULONG            working_buf_size = 15000;
+    IP_ADAPTER_ADDRESSES   *pFirstEntry = NULL;
+    IP_ADAPTER_ADDRESSES   *pEntry = NULL;
+    ULONG                  bufSize = 0;
+    ULONG                  result = 0;
 
-  res = (*ares_fpGetNetworkParams) (fi, &size);
-  if ((res != ERROR_BUFFER_OVERFLOW) && (res != ERROR_SUCCESS))
-     goto quit;
+    /* According to MSDN, the recommended way to do this is to use a temporary
+       buffer of 15K, to "dramatically reduce the chance that the GetAdaptersAddresses
+       method returns ERROR_BUFFER_OVERFLOW" */
+    pFirstEntry  = ( IP_ADAPTER_ADDRESSES * ) malloc( working_buf_size );
+    bufSize = working_buf_size;
+    if( !pFirstEntry )
+      return 0;
 
-  newfi = realloc(fi, size);
-  if (!newfi)
-     goto quit;
+    /* Call the method one time */
+    result = ( *ares_fpGetAdaptersAddresses )( AF_UNSPEC, 0, 0, pFirstEntry, &bufSize );
+    if( result == ERROR_BUFFER_OVERFLOW )
+    {
+      /* Reallocate, bufSize should now be set to the required size */
+      pFirstEntry = ( IP_ADAPTER_ADDRESSES * ) realloc( pFirstEntry, bufSize );
+      if( !pFirstEntry )
+        return 0;
 
-  fi = newfi;
-  res = (*ares_fpGetNetworkParams) (fi, &size);
-  if (res != ERROR_SUCCESS)
-     goto quit;
+      /* Call the method a second time */
+      result = ( *ares_fpGetAdaptersAddresses )( AF_UNSPEC, 0, 0, pFirstEntry, &bufSize );
+      if( result == ERROR_BUFFER_OVERFLOW )
+      {
+        /* Reallocate, bufSize should now be set to the required size */
+        pFirstEntry = ( IP_ADAPTER_ADDRESSES * ) realloc( pFirstEntry, bufSize );
+        if( !pFirstEntry )
+          return 0;
 
-  if (debug)
+        /* Call the method a third time. The maximum number of times we're going to do
+           this is 3. Three shall be the number thou shalt count, and the number of the
+           counting shall be three.  Five is right out. */
+        result = ( *ares_fpGetAdaptersAddresses )( AF_UNSPEC, 0, 0, pFirstEntry, &bufSize );
+      }
+    }
+
+    /* Check the current result for failure */
+    if( result != ERROR_SUCCESS )
+    {
+      free( pFirstEntry );
+      return 0;
+    }
+
+    /* process the results */
+    for( pEntry = pFirstEntry ; pEntry != NULL ; pEntry = pEntry->Next )
+    {
+      IP_ADAPTER_DNS_SERVER_ADDRESS* pDNSAddr = pEntry->FirstDnsServerAddress;
+      for( ; pDNSAddr != NULL ; pDNSAddr = pDNSAddr->Next )
+      {
+        struct sockaddr *pGenericAddr = pDNSAddr->Address.lpSockaddr;
+        size_t stringlen = 0;
+
+        if( pGenericAddr->sa_family == AF_INET && left > ipv4_size )
+        {
+          /* Handle the v4 case */
+          struct sockaddr_in *pIPv4Addr = ( struct sockaddr_in * ) pGenericAddr;
+          ares_inet_ntop( AF_INET, &pIPv4Addr->sin_addr, ret, ipv4_size - 1 ); /* -1 for comma */
+
+          /* Append a comma to the end, THEN NULL. Should be OK because we
+             already tested the size at the top of the if statement. */
+          stringlen = strlen( ret );
+          ret[ stringlen ] = ',';
+          ret[ stringlen + 1 ] = '\0';
+          ret += stringlen + 1;
+          left -= ret - ret_buf;
+          ++count;
+        }
+        else if( pGenericAddr->sa_family == AF_INET6 && left > ipv6_size )
+        {
+          /* Handle the v6 case */
+          struct sockaddr_in6 *pIPv6Addr = ( struct sockaddr_in6 * ) pGenericAddr;
+          ares_inet_ntop( AF_INET6, &pIPv6Addr->sin6_addr, ret, ipv6_size - 1 ); /* -1 for comma */
+
+          /* Append a comma to the end, THEN NULL. Should be OK because we
+             already tested the size at the top of the if statement. */
+          stringlen = strlen( ret );
+          ret[ stringlen ] = ',';
+          ret[ stringlen + 1 ] = '\0';
+          ret += stringlen + 1;
+          left -= ret - ret_buf;
+          ++count;
+
+          /* NB on Windows this also returns stuff in the fec0::/10 range,
+             seems to be hard-coded somehow. Do we need to ignore them? */
+        }
+      }
+    }
+
+    if( pFirstEntry )
+      free( pFirstEntry );
+    if (ret > ret_buf)
+      ret[-1] = '\0';
+    return count;
+  }
+  else
   {
-    printf ("Host Name: %s\n", fi->HostName);
-    printf ("Domain Name: %s\n", fi->DomainName);
-    printf ("DNS Servers:\n"
-            "    %s (primary)\n", fi->DnsServerList.IpAddress.String);
-  }
-  if (strlen(fi->DnsServerList.IpAddress.String) > 0 &&
-      inet_addr(fi->DnsServerList.IpAddress.String) != INADDR_NONE &&
-      left > ip_size)
-  {
-    ret += sprintf (ret, "%s,", fi->DnsServerList.IpAddress.String);
-    left -= ret - ret_buf;
-    count++;
-  }
+    FIXED_INFO    *fi, *newfi;
+    DWORD          size = sizeof (*fi);
+    IP_ADDR_STRING *ipAddr;
+    int            i;
+    int            debug  = 0;
+    HRESULT        res;
 
-  for (i = 0, ipAddr = fi->DnsServerList.Next; ipAddr && left > ip_size;
-       ipAddr = ipAddr->Next, i++)
-  {
-    if (inet_addr(ipAddr->IpAddress.String) != INADDR_NONE)
+    fi = malloc(size);
+    if (!fi)
+      return 0;
+
+    res = (*ares_fpGetNetworkParams) (fi, &size);
+    if ((res != ERROR_BUFFER_OVERFLOW) && (res != ERROR_SUCCESS))
+      goto quit;
+
+    newfi = realloc(fi, size);
+    if (!newfi)
+      goto quit;
+
+    fi = newfi;
+    res = (*ares_fpGetNetworkParams) (fi, &size);
+    if (res != ERROR_SUCCESS)
+      goto quit;
+
+    if (debug)
     {
-       ret += sprintf (ret, "%s,", ipAddr->IpAddress.String);
-       left -= ret - ret_buf;
-       count++;
+      printf ("Host Name: %s\n", fi->HostName);
+      printf ("Domain Name: %s\n", fi->DomainName);
+      printf ("DNS Servers:\n"
+              "    %s (primary)\n", fi->DnsServerList.IpAddress.String);
     }
-    if (debug)
-       printf ("    %s (secondary %d)\n", ipAddr->IpAddress.String, i+1);
-  }
+    if (strlen(fi->DnsServerList.IpAddress.String) > 0 &&
+        inet_addr(fi->DnsServerList.IpAddress.String) != INADDR_NONE &&
+        left > ipv4_size)
+    {
+      ret += sprintf (ret, "%s,", fi->DnsServerList.IpAddress.String);
+      left -= ret - ret_buf;
+      ++count;
+    }
+
+    for (i = 0, ipAddr = fi->DnsServerList.Next; ipAddr && left > ipv4_size;
+         ipAddr = ipAddr->Next, i++)
+    {
+      if (inet_addr(ipAddr->IpAddress.String) != INADDR_NONE)
+      {
+         ret += sprintf (ret, "%s,", ipAddr->IpAddress.String);
+         left -= ret - ret_buf;
+         ++count;
+      }
+      if (debug)
+         printf ("    %s (secondary %d)\n", ipAddr->IpAddress.String, i+1);
+    }
 
 quit:
-  if (fi)
-     free(fi);
+    if (fi)
+      free(fi);
 
-  if (debug && left <= ip_size)
-     printf ("Too many nameservers. Truncating to %d addressess", count);
-  if (ret > ret_buf)
-     ret[-1] = '\0';
-  return count;
+    if (debug && left <= ipv4_size)
+      printf ("Too many nameservers. Truncating to %d addressess", count);
+    if (ret > ret_buf)
+      ret[-1] = '\0';
+    return count;
+  }
 }
 #endif
 
   DWORD data_type;
   DWORD bytes;
   DWORD result;
-  char  buf[256];
+  char  buf[512];
+  win_platform platform;
 
   if (channel->nservers > -1)  /* don't override ARES_OPT_SERVER */
      return ARES_SUCCESS;
       goto okay;
   }
 
-  if (IS_NT())
+  platform = ares__getplatform();
+
+  if (platform == WIN_NT)
   {
     if (RegOpenKeyEx(
           HKEY_LOCAL_MACHINE, WIN_NS_NT_KEY, 0,
       RegCloseKey(mykey);
     }
   }
-  else
+  else if (platform == WIN_9X)
   {
     if (RegOpenKeyEx(
           HKEY_LOCAL_MACHINE, WIN_NS_9X, 0,
      return ARES_ENOMEM;
 
   for (i = 0; def_nameservers[i]; i++)
-      servers[i].addr.addrV4.s_addr = htonl(def_nameservers[i]);
+  {
+    servers[i].addr.addrV4.s_addr = htonl(def_nameservers[i]);
+    servers[i].addr.family = AF_INET;
+  }
   status = ARES_EOF;
 
 #elif defined(ANDROID)
     if (fp) {
       while ((status = ares__read_line(fp, &line, &linesize)) == ARES_SUCCESS)
       {
-        if ((p = try_config(line, "domain")))
+        if ((p = try_config(line, "domain", ';')))
           status = config_domain(channel, p);
-        else if ((p = try_config(line, "lookup")) && !channel->lookups)
+        else if ((p = try_config(line, "lookup", ';')) && !channel->lookups)
           status = config_lookup(channel, p, "bind", "file");
-        else if ((p = try_config(line, "search")))
+        else if ((p = try_config(line, "search", ';')))
           status = set_search(channel, p);
-        else if ((p = try_config(line, "nameserver")) && channel->nservers == -1)
+        else if ((p = try_config(line, "nameserver", ';')) &&
+                 channel->nservers == -1)
           status = config_nameserver(&servers, &nservers, p);
-        else if ((p = try_config(line, "sortlist")) && channel->nsort == -1)
+        else if ((p = try_config(line, "sortlist", ';')) &&
+                 channel->nsort == -1)
           status = config_sortlist(&sortlist, &nsort, p);
-        else if ((p = try_config(line, "options")))
+        else if ((p = try_config(line, "options", ';')))
           status = set_options(channel, p);
         else
           status = ARES_SUCCESS;
       if (fp) {
         while ((status = ares__read_line(fp, &line, &linesize)) == ARES_SUCCESS)
         {
-          if ((p = try_config(line, "hosts:")) && !channel->lookups)
-            status = config_lookup(channel, p, "dns", "files");
+          if ((p = try_config(line, "hosts:", '\0')) && !channel->lookups)
+            /* ignore errors */
+            (void)config_lookup(channel, p, "dns", "files");
         }
         fclose(fp);
       }
       if (fp) {
         while ((status = ares__read_line(fp, &line, &linesize)) == ARES_SUCCESS)
         {
-          if ((p = try_config(line, "order")) && !channel->lookups)
-            status = config_lookup(channel, p, "bind", "hosts");
+          if ((p = try_config(line, "order", '\0')) && !channel->lookups)
+            /* ignore errors */
+            (void)config_lookup(channel, p, "bind", "hosts");
         }
         fclose(fp);
       }
       if (fp) {
         while ((status = ares__read_line(fp, &line, &linesize)) == ARES_SUCCESS)
         {
-          if ((p = try_config(line, "hosts=")) && !channel->lookups)
-            status = config_lookup(channel, p, "bind", "local");
+          if ((p = try_config(line, "hosts=", '\0')) && !channel->lookups)
+            /* ignore errors */
+            (void)config_lookup(channel, p, "bind", "local");
         }
         fclose(fp);
       }
     channel->nservers = 1;
   }
 
-#ifdef ENAMETOOLONG
-#define toolong(x) (x == -1) && ((ENAMETOOLONG == errno) || (EINVAL == errno))
+#if defined(USE_WINSOCK)
+#define toolong(x) (x == -1) &&  (SOCKERRNO == WSAEFAULT)
+#elif defined(ENAMETOOLONG)
+#define toolong(x) (x == -1) && ((SOCKERRNO == ENAMETOOLONG) || \
+                                 (SOCKERRNO == EINVAL))
 #else
-#define toolong(x) (x == -1) && (EINVAL == errno)
+#define toolong(x) (x == -1) &&  (SOCKERRNO == EINVAL)
 #endif
 
   if (channel->ndomains == -1) {
           if (!sortlist_alloc(sortlist, nsort, &pat))
             return ARES_ENOMEM;
         }
-      if (ipbufpfx[0] &&
-          (bits = ares_inet_net_pton(AF_INET, ipbufpfx, &pat.addrV4,
-                                     sizeof(pat.addrV4))) > 0)
+      else if (ipbufpfx[0] &&
+               (bits = ares_inet_net_pton(AF_INET, ipbufpfx, &pat.addrV4,
+                                          sizeof(pat.addrV4))) > 0)
         {
           pat.type = PATTERN_CIDR;
           pat.mask.bits = (unsigned short)bits;
 }
 
 #if !defined(WIN32) && !defined(WATT32)
-static char *try_config(char *s, const char *opt)
+static char *try_config(char *s, const char *opt, char scc)
 {
   size_t len;
   char *p;
     /* no line or no option */
     return NULL;
 
+  /* Hash '#' character is always used as primary comment char, additionally
+     a not-NUL secondary comment char will be considered when specified. */
+
   /* trim line comment */
   p = s;
-  while (*p && (*p != '#'))
-    p++;
+  if(scc)
+    while (*p && (*p != '#') && (*p != scc))
+      p++;
+  else
+    while (*p && (*p != '#'))
+      p++;
   *p = '\0';
 
   /* trim trailing whitespace */

c-ares/ares_library_init.c

 #ifdef USE_WINSOCK
 fpGetNetworkParams_t ares_fpGetNetworkParams = ZERO_NULL;
 fpSystemFunction036_t ares_fpSystemFunction036 = ZERO_NULL;
+fpGetAdaptersAddresses_t ares_fpGetAdaptersAddresses = ZERO_NULL;
 #endif
 
 /* library-private global vars with source visibility restricted to this file */
       return ARES_EADDRGETNETWORKPARAMS;
     }
 
+  ares_fpGetAdaptersAddresses = (fpGetAdaptersAddresses_t)
+    GetProcAddress(hnd_iphlpapi, "GetAdaptersAddresses");
+  if (!ares_fpGetAdaptersAddresses)
+    {
+      /* This can happen on clients before WinXP, I don't
+         think it should be an error, unless we don't want to
+         support Windows 2000 anymore */
+    }
+
   /*
    * When advapi32.dll is unavailable or advapi32.dll has no SystemFunction036,
    * also known as RtlGenRandom, which is the case for Windows versions prior

c-ares/ares_library_init.h

 
 
 /* Copyright 1998 by the Massachusetts Institute of Technology.
- * Copyright (C) 2004-2009 by Daniel Stenberg
+ * Copyright (C) 2004-2011 by Daniel Stenberg
  *
  * Permission to use, copy, modify, and distribute this
  * software and its documentation for any purpose and without
 #ifdef USE_WINSOCK
 
 #include <iphlpapi.h>
+#include <ares_iphlpapi.h>
 
 typedef DWORD (WINAPI *fpGetNetworkParams_t) (FIXED_INFO*, DWORD*);
 typedef BOOLEAN (APIENTRY *fpSystemFunction036_t) (void*, ULONG);
+typedef ULONG (WINAPI *fpGetAdaptersAddresses_t) ( ULONG, ULONG, void*, IP_ADAPTER_ADDRESSES*, ULONG* );
 
 /* Forward-declaration of variables defined in ares_library_init.c */
 /* that are global and unique instances for whole c-ares library.  */
 
 extern fpGetNetworkParams_t ares_fpGetNetworkParams;
 extern fpSystemFunction036_t ares_fpSystemFunction036;
+extern fpGetAdaptersAddresses_t ares_fpGetAdaptersAddresses;
 
 #endif /* USE_WINSOCK */
 

c-ares/ares_nowarn.c

 
-/* Copyright (C) 2010 by Daniel Stenberg
+/* Copyright (C) 2010-2011 by Daniel Stenberg
  *
  * Permission to use, copy, modify, and distribute this
  * software and its documentation for any purpose and without
 
 #include "ares_setup.h"
 
+#ifdef HAVE_ASSERT_H
+#  include <assert.h>
+#endif
+
+#if defined(__INTEL_COMPILER) && defined(__unix__)
+
+#ifdef HAVE_SYS_SOCKET_H
+#  include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#  include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#  include <arpa/inet.h>
+#endif
+
+#endif /* __INTEL_COMPILER && __unix__ */
+
+#define BUILDING_ARES_NOWARN_C 1
+
 #include "ares_nowarn.h"
 
 #if (SIZEOF_INT == 2)
 #endif
 
 /*
-** size_t to signed int
+** unsigned size_t to signed int
 */
 
 int aresx_uztosi(size_t uznum)
 #  pragma warning(disable:810) /* conversion may lose significant bits */
 #endif
 
+  DEBUGASSERT(slnum >= 0);
   return (int)(slnum & (long) CARES_MASK_SINT);
 
 #ifdef __INTEL_COMPILER
 #  pragma warning(pop)
 #endif
 }
+
+/*
+** signed ssize_t to signed int
+*/
+
+int aresx_sztosi(ssize_t sznum)
+{
+#ifdef __INTEL_COMPILER
+#  pragma warning(push)
+#  pragma warning(disable:810) /* conversion may lose significant bits */
+#endif
+
+  DEBUGASSERT(sznum >= 0);
+  return (int)(sznum & (ssize_t) CARES_MASK_SINT);
+
+#ifdef __INTEL_COMPILER
+#  pragma warning(pop)
+#endif
+}
+
+/*
+** signed ssize_t to unsigned int
+*/
+
+unsigned int aresx_sztoui(ssize_t sznum)
+{