Merge pull request #1036 from gevent/cares1130

Upgrade c-ares to 1.13.0. Fixes #990

.gitignore

@@ -38,6 +38,7 @@ deps/c-ares/stamp-h1
 deps/c-ares/stamp-h2
 deps/c-ares/ares_build.h.orig
 deps/c-ares/ares_config.h
+deps/c-ares/ares_build.h
 deps/c-ares/.libs
 deps/c-ares/*.o
 deps/c-ares/*.lo

CHANGES.rst

@@ -80,6 +80,8 @@
 - ``socket.send()`` now catches ``EPROTYPE`` on macOS to handle a race
   condition during shutdown. Fixed in :pr:`1035` by Jay Oster.
 
+- Update c-ares to 1.13.0. See :issue:`990`.
+
 1.2.2 (2017-06-05)
 ==================
 

Makefile

@@ -77,6 +77,7 @@ test_prelim:
 	${PYTHON} --version
 	${PYTHON} -c 'import greenlet; print(greenlet, greenlet.__version__)'
 	${PYTHON} -c 'import gevent.core; print(gevent.core.loop)'
+	${PYTHON} -c 'import gevent.ares; print(gevent.ares)'
 	make bench
 
 toxtest: test_prelim

_setupares.py

@@ -23,6 +23,7 @@ from _setuputils import LIBRARIES
 from _setuputils import DEFINE_MACROS
 from _setuputils import glob_many
 from _setuputils import dep_abspath
+from _setuputils import RUNNING_ON_CI
 
 
 CARES_EMBED = should_embed('c-ares')
@@ -42,7 +43,8 @@ ares_configure_command = ' '.join([
     " && if [ -r ares_build.h ]; then cp ares_build.h ares_build.h.orig; fi ",
     " && sh ./configure --disable-dependency-tracking " + _m32 + "CONFIG_COMMANDS= ",
     " && cp ares_config.h ares_build.h \"$OLDPWD\" ",
-    " && mv ares_build.h.orig ares_build.h)",
+    " && cat ares_build.h ",
+    " && if [ -r ares_build.h.orig ]; then mv ares_build.h.orig ares_build.h; fi)",
     "> configure-output.txt"])
 
 
@@ -83,7 +85,8 @@ ARES = Extension(name='gevent.ares',
                  define_macros=list(DEFINE_MACROS),
                  depends=glob_many('src/gevent/dnshelper.c',
                                    'src/gevent/cares_*.[ch]'))
-ARES.optional = True
+
+ARES.optional = not RUNNING_ON_CI
 
 
 if CARES_EMBED:
@@ -91,10 +94,7 @@ if CARES_EMBED:
     # Strip the standalone binaries that would otherwise
     # cause linking issues
     for bin_c in ('acountry', 'adig', 'ahost'):
-        try:
-            ARES.sources.remove('deps/c-ares/' + bin_c + '.c')
-        except ValueError:
-            pass
+        ARES.sources.remove('deps/c-ares' + os.sep + bin_c + '.c')
     ARES.configure = configure_ares
     if WIN:
         ARES.libraries += ['advapi32']

_setuputils.py

@@ -22,6 +22,9 @@ from setuptools.command.sdist import sdist
 PYPY = hasattr(sys, 'pypy_version_info')
 WIN = sys.platform.startswith('win')
 CFFI_WIN_BUILD_ANYWAY = os.environ.get("PYPY_WIN_BUILD_ANYWAY")
+RUNNING_ON_TRAVIS = os.environ.get('TRAVIS')
+RUNNING_ON_APPVEYOR = os.environ.get('APPVEYOR')
+RUNNING_ON_CI = RUNNING_ON_TRAVIS or RUNNING_ON_APPVEYOR
 
 LIBRARIES = []
 DEFINE_MACROS = []

deps/c-ares/Makefile.Watcom

@@ -52,7 +52,7 @@ LFLAGS += debug all
 CFLAGS += -d0
 !endif
 
-CFLAGS += -d_WIN32_WINNT=0x0501
+CFLAGS += -d_WIN32_WINNT=0x0600
 
 #
 # Change to suite.

deps/c-ares/Makefile.am

@@ -39,7 +39,8 @@ lib_LTLIBRARIES = libcares.la
 man_MANS = $(MANPAGES)
 
 MSVCFILES = vc/vc6aws.dsw vc/acountry/vc6acountry.dsp vc/adig/vc6adig.dsp	\
- vc/ahost/vc6ahost.dsp vc/cares/vc6cares.dsp vc/cares/vc6cares.dsw
+ vc/ahost/vc6ahost.dsp vc/cares/vc6cares.dsp vc/cares/vc6cares.dsw		\
+ msvc_ver.inc
 
 if CURLDEBUG
 PROGS =
@@ -55,7 +56,7 @@ EXTRA_DIST = AUTHORS CHANGES README.cares Makefile.inc Makefile.dj	   \
  Makefile.m32 Makefile.netware Makefile.msvc Makefile.Watcom $(man_MANS)   \
  config-win32.h RELEASE-NOTES libcares.pc.in buildconf get_ver.awk maketgz \
  TODO ares_build.h.in $(PDFPAGES) cares.rc README.msvc $(MSVCFILES)	   \
- $(CSOURCES) $(HHEADERS) config-dos.h acountry.1 adig.1 ahost.1 INSTALL	   \
+ $(CSOURCES) $(HHEADERS) config-dos.h acountry.1 adig.1 ahost.1 INSTALL.md	   \
  README.md LICENSE.md
 
 CLEANFILES = $(PDFPAGES) $(HTMLPAGES)

deps/c-ares/Makefile.in

@@ -321,7 +321,7 @@ CTAGS = ctags
 CSCOPE = cscope
 am__DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/Makefile.inc \
 	$(srcdir)/ares_build.h.in $(srcdir)/ares_config.h.in \
-	$(srcdir)/libcares.pc.in AUTHORS INSTALL NEWS TODO compile \
+	$(srcdir)/libcares.pc.in AUTHORS NEWS TODO compile \
 	config.guess config.sub depcomp install-sh ltmain.sh missing \
 	mkinstalldirs
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
@@ -536,7 +536,8 @@ ACLOCAL_AMFLAGS = -I m4
 lib_LTLIBRARIES = libcares.la
 man_MANS = $(MANPAGES)
 MSVCFILES = vc/vc6aws.dsw vc/acountry/vc6acountry.dsp vc/adig/vc6adig.dsp	\
- vc/ahost/vc6ahost.dsp vc/cares/vc6cares.dsp vc/cares/vc6cares.dsw
+ vc/ahost/vc6ahost.dsp vc/cares/vc6cares.dsp vc/cares/vc6cares.dsw		\
+ msvc_ver.inc
 
 @CURLDEBUG_FALSE@PROGS = ahost adig acountry
 @CURLDEBUG_TRUE@PROGS = 
@@ -547,7 +548,7 @@ EXTRA_DIST = AUTHORS CHANGES README.cares Makefile.inc Makefile.dj	   \
  Makefile.m32 Makefile.netware Makefile.msvc Makefile.Watcom $(man_MANS)   \
  config-win32.h RELEASE-NOTES libcares.pc.in buildconf get_ver.awk maketgz \
  TODO ares_build.h.in $(PDFPAGES) cares.rc README.msvc $(MSVCFILES)	   \
- $(CSOURCES) $(HHEADERS) config-dos.h acountry.1 adig.1 ahost.1 INSTALL	   \
+ $(CSOURCES) $(HHEADERS) config-dos.h acountry.1 adig.1 ahost.1 INSTALL.md	   \
  README.md LICENSE.md
 
 CLEANFILES = $(PDFPAGES) $(HTMLPAGES)
@@ -685,6 +686,7 @@ MANPAGES = ares_cancel.3		\
   ares_init_options.3			\
   ares_library_cleanup.3		\
   ares_library_init.3			\
+  ares_library_initialized.3		\
   ares_mkquery.3			\
   ares_create_query.3			\
   ares_parse_a_reply.3			\
@@ -738,6 +740,7 @@ HTMLPAGES = ares_cancel.html		\
   ares_init_options.html		\
   ares_library_cleanup.html		\
   ares_library_init.html		\
+  ares_library_initialized.html		\
   ares_mkquery.html			\
   ares_create_query.html			\
   ares_parse_a_reply.html		\
@@ -790,6 +793,7 @@ PDFPAGES = ares_cancel.pdf		\
   ares_init_options.pdf			\
   ares_library_cleanup.pdf		\
   ares_library_init.pdf			\
+  ares_library_initialized.pdf		\
   ares_mkquery.pdf			\
   ares_create_query.pdf			\
   ares_parse_a_reply.pdf		\

deps/c-ares/Makefile.inc

@@ -92,6 +92,7 @@ MANPAGES = ares_cancel.3		\
   ares_init_options.3			\
   ares_library_cleanup.3		\
   ares_library_init.3			\
+  ares_library_initialized.3		\
   ares_mkquery.3			\
   ares_create_query.3			\
   ares_parse_a_reply.3			\
@@ -145,6 +146,7 @@ HTMLPAGES = ares_cancel.html		\
   ares_init_options.html		\
   ares_library_cleanup.html		\
   ares_library_init.html		\
+  ares_library_initialized.html		\
   ares_mkquery.html			\
   ares_create_query.html			\
   ares_parse_a_reply.html		\
@@ -197,6 +199,7 @@ PDFPAGES = ares_cancel.pdf		\
   ares_init_options.pdf			\
   ares_library_cleanup.pdf		\
   ares_library_init.pdf			\
+  ares_library_initialized.pdf		\
   ares_mkquery.pdf			\
   ares_create_query.pdf			\
   ares_parse_a_reply.pdf		\

deps/c-ares/Makefile.m32

@@ -17,7 +17,7 @@ RANLIB	= $(CROSSPREFIX)ranlib
 #RM	= rm -f
 CP	= cp -afv
 
-CFLAGS	= $(CARES_CFLAG_EXTRAS) -O2 -Wall -I.
+CFLAGS	= $(CARES_CFLAG_EXTRAS) -O2 -Wall -I. -D_WIN32_WINNT=0x0600
 CFLAGS	+= -DCARES_STATICLIB
 LDFLAGS	= $(CARES_LDFLAG_EXTRAS) -s
 LIBS	= -lwsock32

deps/c-ares/Makefile.msvc

@@ -184,7 +184,7 @@ CFLAGS  = /UWIN32 /DWATT32 /I$(WATT_ROOT)\inc
 EX_LIBS_REL = $(WATT_ROOT)\lib\wattcpvc_imp.lib
 EX_LIBS_DBG = $(WATT_ROOT)\lib\wattcpvc_imp_d.lib
 !ELSE
-CFLAGS  = /DWIN32
+CFLAGS  = /DWIN32 /D_WIN32_WINNT=0x0600
 EX_LIBS_REL = ws2_32.lib advapi32.lib kernel32.lib
 EX_LIBS_DBG = ws2_32.lib advapi32.lib kernel32.lib
 !ENDIF

deps/c-ares/README.md

@@ -12,8 +12,9 @@ perform multiple DNS queries in parallel.  The primary examples of such
 applications are servers which communicate with multiple clients and programs
 with graphical user interfaces.
 
-The full source code is available in the 'c-ares' release archives, and in a
-git repository: http://github.com/c-ares/c-ares
+The full source code is available in the ['c-ares' release archives](https://c-ares.haxx.se/download/),
+and in a git repository: http://github.com/c-ares/c-ares.  See the
+[INSTALL.md](INSTALL.md) file for build information.
 
 If you find bugs, correct flaws, have questions or have comments in general in
 regard to c-ares (or by all means the original ares too), get in touch with us

deps/c-ares/RELEASE-NOTES

-c-ares version 1.12.0
+c-ares version 1.13.0
 
 Changes:
 
- o api: add ARES_OPT_NOROTATE optmask value
+ o cmake build system support added
+ o Add virtual function set for socket IO: ares_set_socket_functions [5]
  
 Bug fixes:
 
- o CVE-2016-5180: ares_create_query single byte out of buffer write [4]
- o configure: acknowledge --disable-tests [1]
- o man pages: fix typos detected by Lintian
- o test: add missing #includes for dns-proto.cc
- o test: avoid in6addr_* constants
- o test: Build with MinGW on AppVeyor
- o Makefile.m32: add support for extra flags
- o Makefile.m32: add support for CROSSPREFIX
- o configure: check if tests can get built before enabled
- o ares_library_cleanup: reset ares_realloc too
- o ahost.c: add cast to fix C++ compile
- o test: Only pass unused args to GoogleTest
- o build: commonize MSVC version detection
- o msvc_ver.inc: support Visual Studio 2015 Update 1, 2, 3
- o test: for AF_UNSPEC, return CNAME only for AAAA, but valid A record
- o ares_getnameinfo: explicitly clear struct servent before use
- o test: Update fuzzing function prototype
- o init: fix nsort initialization
- o test: add fuzzing check script to tests
- o web: http => https
- o read_tcp_data: remove superfluous NULL check
- o LICENSE.md: add a stand-alone license file
- o SECURITY.md: suggested "security process" for the project
- o ares_init_options: only propagate init failures from options [2]
- o headers: remove checks for and defines of variable sizes
- o test: fix gMock to work with gcc >= 6.x [3]
+ o CVE-2017-1000381: c-ares NAPTR parser out of bounds access [1]
+ o macos: do not set HAVE_CLOCK_GETTIME_MONOTONIC
+ o test: check ares_create_query with too-long name
+ o dist: add ares_library_initialized.* to the tarball
+ o fix build on OpenBSD
+ o dist: ship msvc_ver.inc too [2]
+ o test: Add gTest/gMock files to SOURCES
+ o test: add fuzz entrypoint for ares_create_query()
+ o configure: clock_gettime workaround [3]
+ o docs: convert INSTALL to MarkDown & tweak [4]
+ o ares_process: fix return type of socket_create function (win32 warning)
+ o docs: fixed references to ares_set_local_ip4 and ares_set_local_ip6
+ o Windows DNS server sorting [6]
+ o Use ares_socklen_t instead of socket_t [7]
+ o ares_create_query: use ares_free not naked free
+ o msvc_ver.inc support most recent Visual Studio 2017 [8]
+ o acountry: Convert char from ISO-8859-1 to UTF-8 [9]
+ o ares_expand_name: limit number of indirections
+ o configure: do not check for ar if specified manually [10]
+ o Added support for Windows DNS Suffix Search List [11]
+ o ares.h: support compiling with QNX [12]
  
 Thanks go to these friendly people for their efforts and contributions:
 
-  Alexander Drachevskiy, Brad House, Chris Araman, Daniel Stenberg,
-  David Drysdale, Gregor Jasny, Svante Karlsson, Viktor Szakats
+  Aaron Bieber, Andrew Sullivan, Brad House, Bruce Stephens, Calle Wilund,
+  Chris Araman, Christian Ammer, Daniel Stenberg, David Drysdale, David Hotham,
+  Dionna Glaze, Gregor Jasny, Michael Osei, Mulle kybernetiK, noiz at github,
+  Sergii Pylypenko, Stephen Sorley, Thomas Köckerbauer,
+  (18 contributors)
 
 References to bug reports and discussions on issues:
 
- [1] = https://github.com/c-ares/c-ares/issues/44
- [2] = https://github.com/c-ares/c-ares/issues/60
- [3] = https://github.com/google/googletest/issues/705#issuecomment-235067917
- [4] = https://c-ares.haxx.se/adv_20160929.html
+ [1] = https://c-ares.haxx.se/adv_20170620.html
+ [2] = https://github.com/c-ares/c-ares/issues/69
+ [3] = https://github.com/c-ares/c-ares/issues/71
+ [4] = https://github.com/c-ares/c-ares/issues/83
+ [5] = https://github.com/c-ares/c-ares/issues/72
+ [6] = https://github.com/c-ares/c-ares/issues/81
+ [7] = https://github.com/c-ares/c-ares/issues/92
+ [8] = https://github.com/c-ares/c-ares/issues/101
+ [9] = https://github.com/c-ares/c-ares/issues/97
+ [10] = https://github.com/c-ares/c-ares/issues/62
+ [11] = https://github.com/c-ares/c-ares/issues/93
+ [12] = https://github.com/c-ares/c-ares/issues/113
+

deps/c-ares/acountry.c

@@ -273,7 +273,7 @@ static const struct search_list *list_lookup(int number, const struct search_lis
  */
 static const struct search_list country_list[] = {
        {   4, "af", "Afghanistan"                          },
-       { 248, "ax", "land Island"                         },
+       { 248, "ax", "Åland Island"                         },
        {   8, "al", "Albania"                              },
        {  12, "dz", "Algeria"                              },
        {  16, "as", "American Samoa"                       },

deps/c-ares/ares.h

@@ -38,7 +38,8 @@
    require it! */
 #if defined(_AIX) || defined(__NOVELL_LIBC__) || defined(__NetBSD__) || \
     defined(__minix) || defined(__SYMBIAN32__) || defined(__INTEGRITY) || \
-    defined(ANDROID) || defined(__ANDROID__)
+    defined(ANDROID) || defined(__ANDROID__) || defined(__OpenBSD__) || \
+    defined(__QNXNTO__)
 #include <sys/select.h>
 #endif
 #if (defined(NETWARE) && !defined(__NOVELL_LIBC__))
@@ -356,6 +357,27 @@ CARES_EXTERN void ares_set_socket_configure_callback(ares_channel channel,
 CARES_EXTERN int ares_set_sortlist(ares_channel channel,
                                    const char *sortstr);
 
+/*
+ * Virtual function set to have user-managed socket IO.
+ * Note that all functions need to be defined, and when
+ * set, the library will not do any bind nor set any
+ * socket options, assuming the client handles these
+ * through either socket creation or the
+ * ares_sock_config_callback call.
+ */
+struct iovec;
+struct ares_socket_functions {
+   ares_socket_t(*asocket)(int, int, int, void *);
+   int(*aclose)(ares_socket_t, void *);
+   int(*aconnect)(ares_socket_t, const struct sockaddr *, ares_socklen_t, void *);
+   ares_ssize_t(*arecvfrom)(ares_socket_t, void *, size_t, int, struct sockaddr *, ares_socklen_t *, void *);
+   ares_ssize_t(*asendv)(ares_socket_t, const struct iovec *, int, void *);
+};
+
+CARES_EXTERN void ares_set_socket_functions(ares_channel channel,
+					    const struct ares_socket_functions * funcs,
+					    void *user_data);
+
 CARES_EXTERN void ares_send(ares_channel channel,
                             const unsigned char *qbuf,
                             int qlen,

deps/c-ares/ares__close_sockets.c

@@ -48,14 +48,14 @@ void ares__close_sockets(ares_channel channel, struct server_state *server)
   if (server->tcp_socket != ARES_SOCKET_BAD)
     {
       SOCK_STATE_CALLBACK(channel, server->tcp_socket, 0, 0);
-      sclose(server->tcp_socket);
+      ares__socket_close(channel, server->tcp_socket);
       server->tcp_socket = ARES_SOCKET_BAD;
       server->tcp_connection_generation = ++channel->tcp_connection_generation;
     }
   if (server->udp_socket != ARES_SOCKET_BAD)
     {
       SOCK_STATE_CALLBACK(channel, server->udp_socket, 0, 0);
-      sclose(server->udp_socket);
+      ares__socket_close(channel, server->udp_socket);
       server->udp_socket = ARES_SOCKET_BAD;
     }
 }

deps/c-ares/ares_build.h

-#ifndef __CARES_BUILD_H
-#define __CARES_BUILD_H
-
-
-/* Copyright (C) 2009 - 2013 by Daniel Stenberg et al
- *
- * 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.
- */
-
-/* ================================================================ */
-/*               NOTES FOR CONFIGURE CAPABLE SYSTEMS                */
-/* ================================================================ */
-
-/*
- * NOTE 1:
- * -------
- *
- * See file ares_build.h.in, run configure, and forget that this file
- * exists it is only used for non-configure systems.
- * But you can keep reading if you want ;-)
- *
- */
-
-/* ================================================================ */
-/*                 NOTES FOR NON-CONFIGURE SYSTEMS                  */
-/* ================================================================ */
-
-/*
- * NOTE 1:
- * -------
- *
- * Nothing in this file is intended to be modified or adjusted by the
- * c-ares library user nor by the c-ares library builder.
- *
- * If you think that something actually needs to be changed, adjusted
- * or fixed in this file, then, report it on the c-ares development
- * mailing list: http://cool.haxx.se/mailman/listinfo/c-ares/
- *
- * Try to keep one section per platform, compiler and architecture,
- * otherwise, if an existing section is reused for a different one and
- * later on the original is adjusted, probably the piggybacking one can
- * be adversely changed.
- *
- * In order to differentiate between platforms/compilers/architectures
- * use only compiler built in predefined preprocessor symbols.
- *
- * This header file shall only export symbols which are 'cares' or 'CARES'
- * prefixed, otherwise public name space would be polluted.
- *
- * NOTE 2:
- * -------
- *
- * Right now you might be staring at file ares_build.h.dist or ares_build.h,
- * this is due to the following reason: file ares_build.h.dist is renamed
- * to ares_build.h when the c-ares source code distribution archive file is
- * created.
- *
- * File ares_build.h.dist is not included in the distribution archive.
- * File ares_build.h is not present in the git tree.
- *
- * The distributed ares_build.h file is only intended to be used on systems
- * which can not run the also distributed configure script.
- *
- * On systems capable of running the configure script, the configure process
- * will overwrite the distributed ares_build.h file with one that is suitable
- * and specific to the library being configured and built, which is generated
- * from the ares_build.h.in template file.
- *
- * If you check out from git on a non-configure platform, you must run the
- * appropriate buildconf* script to set up ares_build.h and other local files.
- *
- */
-
-/* ================================================================ */
-/*  DEFINITION OF THESE SYMBOLS SHALL NOT TAKE PLACE ANYWHERE ELSE  */
-/* ================================================================ */
-
-#ifdef CARES_TYPEOF_ARES_SOCKLEN_T
-#  error "CARES_TYPEOF_ARES_SOCKLEN_T shall not be defined except in ares_build.h"
-   Error Compilation_aborted_CARES_TYPEOF_ARES_SOCKLEN_T_already_defined
-#endif
-
-/* ================================================================ */
-/*    EXTERNAL INTERFACE SETTINGS FOR NON-CONFIGURE SYSTEMS ONLY    */
-/* ================================================================ */
-
-#if defined(__DJGPP__) || defined(__GO32__)
-#  define CARES_TYPEOF_ARES_SOCKLEN_T int
-
-#elif defined(__SALFORDC__)
-#  define CARES_TYPEOF_ARES_SOCKLEN_T int
-
-#elif defined(__BORLANDC__)
-#  define CARES_TYPEOF_ARES_SOCKLEN_T int
-
-#elif defined(__TURBOC__)
-#  define CARES_TYPEOF_ARES_SOCKLEN_T int
-
-#elif defined(__WATCOMC__)
-#  define CARES_TYPEOF_ARES_SOCKLEN_T int
-
-#elif defined(__POCC__)
-#  define CARES_TYPEOF_ARES_SOCKLEN_T int
-
-#elif defined(__LCC__)
-#  define CARES_TYPEOF_ARES_SOCKLEN_T int
-
-#elif defined(__SYMBIAN32__)
-#  define CARES_TYPEOF_ARES_SOCKLEN_T unsigned int
-
-#elif defined(__MWERKS__)
-#  define CARES_TYPEOF_ARES_SOCKLEN_T int
-
-#elif defined(_WIN32_WCE)
-#  define CARES_TYPEOF_ARES_SOCKLEN_T int
-
-#elif defined(__MINGW32__)
-#  define CARES_TYPEOF_ARES_SOCKLEN_T int
-
-#elif defined(__VMS)
-#  define CARES_TYPEOF_ARES_SOCKLEN_T unsigned int
-
-#elif defined(__OS400__)
-#  if defined(__ILEC400__)
-#    define CARES_TYPEOF_ARES_SOCKLEN_T socklen_t
-#    define CARES_PULL_SYS_TYPES_H      1
-#    define CARES_PULL_SYS_SOCKET_H     1
-#  endif
-
-#elif defined(__MVS__)
-#  if defined(__IBMC__) || defined(__IBMCPP__)
-#    define CARES_TYPEOF_ARES_SOCKLEN_T socklen_t
-#    define CARES_PULL_SYS_TYPES_H      1
-#    define CARES_PULL_SYS_SOCKET_H     1
-#  endif
-
-#elif defined(__370__)
-#  if defined(__IBMC__) || defined(__IBMCPP__)
-#    define CARES_TYPEOF_ARES_SOCKLEN_T socklen_t
-#    define CARES_PULL_SYS_TYPES_H      1
-#    define CARES_PULL_SYS_SOCKET_H     1
-#  endif
-
-#elif defined(TPF)
-#  define CARES_TYPEOF_ARES_SOCKLEN_T int
-
-/* ===================================== */
-/*    KEEP MSVC THE PENULTIMATE ENTRY    */
-/* ===================================== */
-
-#elif defined(_MSC_VER)
-#  define CARES_TYPEOF_ARES_SOCKLEN_T int
-
-/* ===================================== */
-/*    KEEP GENERIC GCC THE LAST ENTRY    */
-/* ===================================== */
-
-#elif defined(__GNUC__)
-#  define CARES_TYPEOF_ARES_SOCKLEN_T socklen_t
-#  define CARES_PULL_SYS_TYPES_H      1
-#  define CARES_PULL_SYS_SOCKET_H     1
-
-#else
-#  error "Unknown non-configure build target!"
-   Error Compilation_aborted_Unknown_non_configure_build_target
-#endif
-
-/* CARES_PULL_SYS_TYPES_H is defined above when inclusion of header file  */
-/* sys/types.h is required here to properly make type definitions below.  */
-#ifdef CARES_PULL_SYS_TYPES_H
-#  include <sys/types.h>
-#endif
-
-/* CARES_PULL_SYS_SOCKET_H is defined above when inclusion of header file  */
-/* sys/socket.h is required here to properly make type definitions below.  */
-#ifdef CARES_PULL_SYS_SOCKET_H
-#  include <sys/socket.h>
-#endif
-
-/* Data type definition of ares_socklen_t. */
-
-#ifdef CARES_TYPEOF_ARES_SOCKLEN_T
-  typedef CARES_TYPEOF_ARES_SOCKLEN_T ares_socklen_t;
-#endif
-
-#endif /* __CARES_BUILD_H */

deps/c-ares/ares_build.h.dist

@@ -251,4 +251,17 @@
   typedef CARES_TYPEOF_ARES_SOCKLEN_T ares_socklen_t;
 #endif
 
+/* Data type definition of ares_ssize_t. */
+#ifdef _WIN32
+#  ifdef _WIN64
+#    define CARES_TYPEOF_ARES_SSIZE_T __int64
+#  else
+#    define CARES_TYPEOF_ARES_SSIZE_T long
+#  endif
+#else
+#  define CARES_TYPEOF_ARES_SSIZE_T ssize_t;
+#endif
+
+typedef CARES_TYPEOF_ARES_SSIZE_T ares_ssize_t;
+
 #endif /* __CARES_BUILD_H */

deps/c-ares/ares_build.h.in

@@ -91,4 +91,10 @@
 /* Data type definition of ares_socklen_t. */
 typedef CARES_TYPEOF_ARES_SOCKLEN_T ares_socklen_t;
 
+/* Integral data type used for ares_ssize_t. */
+#undef CARES_TYPEOF_ARES_SSIZE_T
+
+/* Data type definition of ares_ssize_t. */
+typedef CARES_TYPEOF_ARES_SSIZE_T ares_ssize_t;
+
 #endif /* __CARES_BUILD_H */

deps/c-ares/ares_cancel.3

@@ -18,9 +18,9 @@
 ares_cancel \- Cancel a resolve
 .SH SYNOPSIS
 .nf
-.B #include <ares.h>
-.PP
-.B void ares_cancel(ares_channel \fIchannel\fP)
+#include <ares.h>
+
+void ares_cancel(ares_channel \fIchannel\fP)
 .fi
 .SH DESCRIPTION
 The \fBares_cancel(3)\fP function cancels all lookups/requests made on the the

deps/c-ares/ares_config.h.in

@@ -18,6 +18,9 @@
 /* Definition to make a library symbol externally visible. */
 #undef CARES_SYMBOL_SCOPE_EXTERN
 
+/* the signed version of size_t */
+#undef CARES_TYPEOF_ARES_SSIZE_T
+
 /* Use resolver library to configure cares */
 #undef CARES_USE_LIBRESOLV
 
@@ -496,6 +499,3 @@
 
 /* Define to `unsigned int' if <sys/types.h> does not define. */
 #undef size_t
-
-/* the signed version of size_t */
-#undef ssize_t

deps/c-ares/ares_create_query.c

@@ -134,7 +134,7 @@ int ares_create_query(const char *name, int dnsclass, int type,
   while (*name)
     {
       if (*name == '.') {
-        free (buf);
+        ares_free (buf);
         return ARES_EBADNAME;
       }
 
@@ -147,7 +147,7 @@ int ares_create_query(const char *name, int dnsclass, int type,
           len++;
         }
       if (len > MAXLABEL) {
-        free (buf);
+        ares_free (buf);
         return ARES_EBADNAME;
       }
 
@@ -190,7 +190,7 @@ int ares_create_query(const char *name, int dnsclass, int type,
    * to 255 octets or less."). */
   if (buflen > (MAXCDNAME + HFIXEDSZ + QFIXEDSZ +
                 (max_udp_size ? EDNSFIXEDSZ : 0))) {
-    free (buf);
+    ares_free (buf);
     return ARES_EBADNAME;
   }
 

deps/c-ares/ares_destroy.3

@@ -18,9 +18,9 @@
 ares_destroy \- Destroy a resolver channel
 .SH SYNOPSIS
 .nf
-.B #include <ares.h>
-.PP
-.B void ares_destroy(ares_channel \fIchannel\fP)
+#include <ares.h>
+
+void ares_destroy(ares_channel \fIchannel\fP)
 .fi
 .SH DESCRIPTION
 The \fBares_destroy(3)\fP function destroys the name service channel
@@ -28,7 +28,7 @@ identified by \fIchannel\fP, freeing all memory and closing all sockets used
 by the channel.
 
 \fBares_destroy(3)\fP invokes the callbacks for each pending query on the
-channel, passing a status of \IARES_EDESTRUCTION\fP. These calls give the
+channel, passing a status of \fIARES_EDESTRUCTION\fP. These calls give the
 callbacks a chance to clean up any state which might have been stored in their
 arguments. A callback must not add new requests to a channel being destroyed.
 .SH SEE ALSO

deps/c-ares/ares_expand_name.c

@@ -32,6 +32,9 @@
 #include "ares_nowarn.h"
 #include "ares_private.h" /* for the memdebug */
 
+/* Maximum number of indirections allowed for a name */
+#define MAX_INDIRS 50
+
 static int name_length(const unsigned char *encoded, const unsigned char *abuf,
                        int alen);
 
@@ -66,7 +69,7 @@ int ares_expand_name(const unsigned char *encoded, const unsigned char *abuf,
   char *q;
   const unsigned char *p;
   union {
-    ssize_t sig;
+    ares_ssize_t sig;
      size_t uns;
   } nlen;
 
@@ -162,7 +165,8 @@ static int name_length(const unsigned char *encoded, const unsigned char *abuf,
           /* If we've seen more indirects than the message length,
            * then there's a loop.
            */
-          if (++indir > alen)
+          ++indir;
+          if (indir > alen || indir > MAX_INDIRS)
             return -1;
         }
       else if (top == 0x00)

deps/c-ares/ares_expand_string.c

@@ -41,7 +41,7 @@ int ares_expand_string(const unsigned char *encoded,
 {
   unsigned char *q;
   union {
-    ssize_t sig;
+    ares_ssize_t sig;
      size_t uns;
   } elen;
 

deps/c-ares/ares_fds.3

@@ -15,43 +15,30 @@
 .\"
 .TH ARES_FDS 3 "23 July 1998"
 .SH NAME
-ares_fds \- Get file descriptors to select on for name service
+ares_fds \- return file descriptors to select on
 .SH SYNOPSIS
 .nf
-.B #include <ares.h>
-.PP
-.B int ares_fds(ares_channel \fIchannel\fP, fd_set *\fIread_fds\fP,
-.B	fd_set *\fIwrite_fds\fP)
+#include <ares.h>
+
+int ares_fds(ares_channel \fIchannel\fP,
+             fd_set *\fIread_fds\fP,
+	     fd_set *\fIwrite_fds\fP)
 .fi
 .SH DESCRIPTION
-The
-.B ares_fds
-function retrieves the set of file descriptors which the calling
-application should select on for reading and writing for the
+The \fBares_fds(3)\fP function retrieves the set of file descriptors which the
+calling application should select on for reading and writing for the
 processing of name service queries pending on the name service channel
-identified by
-.IR channel .
+identified by \fIchannel\fP.
+
 File descriptors will be set in the file descriptor sets pointed to by
-.I read_fds
-and
-.I write_fds
-as appropriate.  File descriptors already set in
-.I read_fds
-and
-.I write_fds
-will remain set; initialization of the file descriptor sets
-(using
-.BR FD_ZERO )
-is the responsibility of the caller.
+\fIread_fds\fP and \fIwrite_fds\fP as appropriate.  File descriptors already
+set in \fIread_fds\fP and \fIwrite_fds\fP will remain set; initialization of
+the file descriptor sets (using \fBFD_ZERO\fP) is the responsibility of the
+caller.
 .SH RETURN VALUES
-.B ares_fds
-returns one greater than the number of the highest socket set in either
-.I read_fds
-or
-.IR write_fds .
-If no queries are active,
-.B ares_fds
-will return 0.
+\fBares_fds(3)\fP returns a value that is one greater than the number of the
+highest socket set in either \fIread_fds\fP or \fIwrite_fds\fP.  If no queries
+are active, \fBares_fds(3)\fP returns 0.
 .SH SEE ALSO
 .BR ares_timeout (3),
 .BR ares_process (3)

deps/c-ares/ares_getnameinfo.c

@@ -356,12 +356,9 @@ static void append_scopeid(struct sockaddr_in6 *addr6, unsigned int flags,
 #ifdef HAVE_IF_INDEXTONAME
   int is_ll, is_mcll;
 #endif
-  static const char fmt_u[] = "%u";
-  static const char fmt_lu[] = "%lu";
   char tmpbuf[IF_NAMESIZE + 2];
   size_t bufl;
-  const char *fmt = (sizeof(addr6->sin6_scope_id) > sizeof(unsigned int))?
-    fmt_lu:fmt_u;
+  int is_scope_long = sizeof(addr6->sin6_scope_id) > sizeof(unsigned int);
 
   tmpbuf[0] = '%';
 
@@ -371,15 +368,38 @@ static void append_scopeid(struct sockaddr_in6 *addr6, unsigned int flags,
   if ((flags & ARES_NI_NUMERICSCOPE) ||
       (!is_ll && !is_mcll))
     {
-       sprintf(&tmpbuf[1], fmt, addr6->sin6_scope_id);
+      if (is_scope_long)
+        {
+          sprintf(&tmpbuf[1], "%lu", (unsigned long)addr6->sin6_scope_id);
+        }
+      else
+        {
+          sprintf(&tmpbuf[1], "%u", (unsigned int)addr6->sin6_scope_id);
+        }
     }
   else
     {
       if (if_indextoname(addr6->sin6_scope_id, &tmpbuf[1]) == NULL)
-        sprintf(&tmpbuf[1], fmt, addr6->sin6_scope_id);
+        {
+          if (is_scope_long)
+            {
+              sprintf(&tmpbuf[1], "%lu", (unsigned long)addr6->sin6_scope_id);
+            }
+          else
+            {
+              sprintf(&tmpbuf[1], "%u", (unsigned int)addr6->sin6_scope_id);
+            }
+        }
     }
 #else
-  sprintf(&tmpbuf[1], fmt, addr6->sin6_scope_id);
+  if (is_scope_long)
+    {
+      sprintf(&tmpbuf[1], "%lu", (unsigned long)addr6->sin6_scope_id);
+    }
+  else
+    {
+      sprintf(&tmpbuf[1], "%u", (unsigned int)addr6->sin6_scope_id);
+    }
   (void) flags;
 #endif
   tmpbuf[IF_NAMESIZE + 1] = '\0';

deps/c-ares/ares_init_options.3

@@ -21,6 +21,27 @@ ares_init_options \- Initialize a resolver channel
 .nf
 #include <ares.h>
 
+struct ares_options {
+  int flags;
+  int timeout; /* in seconds or milliseconds, depending on options */
+  int tries;
+  int ndots;
+  unsigned short udp_port;
+  unsigned short tcp_port;
+  int socket_send_buffer_size;
+  int socket_receive_buffer_size;
+  struct in_addr *servers;
+  int nservers;
+  char **domains;
+  int ndomains;
+  char *lookups;
+  ares_sock_state_cb sock_state_cb;
+  void *sock_state_cb_data;
+  struct apattern *sortlist;
+  int nsort;
+  int ednspsz;
+};
+
 int ares_init_options(ares_channel *\fIchannelptr\fP,
                       struct ares_options *\fIoptions\fP,
                       int \fIoptmask\fP)

deps/c-ares/ares_library_cleanup.3

@@ -19,11 +19,9 @@
 ares_library_cleanup \- c-ares library deinitialization
 .SH SYNOPSIS
 .nf
-.B #include <ares.h>
-.PP
-.B void ares_library_cleanup(void)
-.PP
-.B cc file.c -lcares
+#include <ares.h>
+
+void ares_library_cleanup(void)
 .fi
 .SH DESCRIPTION
 .PP

deps/c-ares/ares_library_init.c

@@ -27,6 +27,7 @@
 fpGetNetworkParams_t ares_fpGetNetworkParams = ZERO_NULL;
 fpSystemFunction036_t ares_fpSystemFunction036 = ZERO_NULL;
 fpGetAdaptersAddresses_t ares_fpGetAdaptersAddresses = ZERO_NULL;
+fpGetBestRoute2_t ares_fpGetBestRoute2 = ZERO_NULL;
 #endif
 
 /* library-private global vars with source visibility restricted to this file */
@@ -71,6 +72,15 @@ static int ares_win32_init(void)
          support Windows 2000 anymore */
     }
 
+  ares_fpGetBestRoute2 = (fpGetBestRoute2_t)
+    GetProcAddress(hnd_iphlpapi, "GetBestRoute2");
+  if (!ares_fpGetBestRoute2)
+    {
+      /* This can happen on clients before Vista, I don't
+         think it should be an error, unless we don't want to
+         support Windows XP anymore */
+    }
+
   /*
    * When advapi32.dll is unavailable or advapi32.dll has no SystemFunction036,
    * also known as RtlGenRandom, which is the case for Windows versions prior

deps/c-ares/ares_library_init.h

@@ -28,13 +28,14 @@
 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* );
-
+typedef NETIO_STATUS (WINAPI *fpGetBestRoute2_t) ( NET_LUID *, NET_IFINDEX, const SOCKADDR_INET *, const SOCKADDR_INET *, ULONG, PMIB_IPFORWARD_ROW2, SOCKADDR_INET * );
 /* 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;
+extern fpGetBestRoute2_t ares_fpGetBestRoute2;
 
 #endif /* USE_WINSOCK */
 

deps/c-ares/ares_library_initialized.3

+.\"
+.\" Copyright (C) 2016 by Daniel Stenberg
+.\"
+.\" 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.
+.\"
+.TH ARES_LIBRARY_INITIALIZED 3 "29 Sep 2016"
+.SH NAME
+ares_library_initialized \- get the initialization state
+.SH SYNOPSIS
+.nf
+#include <ares.h>
+
+int ares_library_initialized(void)
+.fi
+.SH DESCRIPTION
+Returns information if c-ares needs to get initialized.
+.SH RETURN VALUE
+\fIARES_ENOTINITIALIZED\fP if not initialized and \fIARES_SUCCESS\fP if no
+initialization is needed.
+.SH AVAILABILITY
+This function was first introduced in c-ares version 1.11.0
+.SH SEE ALSO
+.BR ares_library_init(3),
+.BR ares_library_cleanup(3)

deps/c-ares/ares_nowarn.c

@@ -151,10 +151,10 @@ int aresx_sltosi(long slnum)
 }
 
 /*
-** signed ssize_t to signed int
+** signed ares_ssize_t to signed int
 */
 
-int aresx_sztosi(ssize_t sznum)
+int aresx_sztosi(ares_ssize_t sznum)
 {
 #ifdef __INTEL_COMPILER
 #  pragma warning(push)
@@ -162,7 +162,7 @@ int aresx_sztosi(ssize_t sznum)
 #endif
 
   DEBUGASSERT(sznum >= 0);
-  return (int)(sznum & (ssize_t) CARES_MASK_SINT);
+  return (int)(sznum & (ares_ssize_t) CARES_MASK_SINT);
 
 #ifdef __INTEL_COMPILER
 #  pragma warning(pop)
@@ -170,10 +170,10 @@ int aresx_sztosi(ssize_t sznum)
 }
 
 /*
-** signed ssize_t to unsigned int
+** signed ares_ssize_t to unsigned int
 */
 
-unsigned int aresx_sztoui(ssize_t sznum)
+unsigned int aresx_sztoui(ares_ssize_t sznum)
 {
 #ifdef __INTEL_COMPILER
 #  pragma warning(push)
@@ -181,7 +181,7 @@ unsigned int aresx_sztoui(ssize_t sznum)
 #endif
 
   DEBUGASSERT(sznum >= 0);
-  return (unsigned int)(sznum & (ssize_t) CARES_MASK_UINT);
+  return (unsigned int)(sznum & (ares_ssize_t) CARES_MASK_UINT);
 
 #ifdef __INTEL_COMPILER
 #  pragma warning(pop)

deps/c-ares/ares_nowarn.h

@@ -25,9 +25,9 @@ short aresx_sitoss(int sinum);
 
 int aresx_sltosi(long slnum);
 
-int aresx_sztosi(ssize_t sznum);
+int aresx_sztosi(ares_ssize_t sznum);
 
-unsigned int aresx_sztoui(ssize_t sznum);
+unsigned int aresx_sztoui(ares_ssize_t sznum);
 
 unsigned short aresx_sitous(int sinum);
 

deps/c-ares/ares_parse_naptr_reply.c

@@ -110,6 +110,12 @@ ares_parse_naptr_reply (const unsigned char *abuf, int alen,
           status = ARES_EBADRESP;
           break;
         }
+      /* RR must contain at least 7 bytes = 2 x int16 + 3 x name */
+      if (rr_len < 7)
+        {
+          status = ARES_EBADRESP;
+          break;
+        }
 
       /* Check if we are really looking at a NAPTR record */
       if (rr_class == C_IN && rr_type == T_NAPTR)
@@ -185,4 +191,3 @@ ares_parse_naptr_reply (const unsigned char *abuf, int alen,
 
   return ARES_SUCCESS;
 }
-

deps/c-ares/ares_private.h

@@ -54,10 +54,16 @@
 
 #define WIN_NS_9X      "System\\CurrentControlSet\\Services\\VxD\\MSTCP"
 #define WIN_NS_NT_KEY  "System\\CurrentControlSet\\Services\\Tcpip\\Parameters"
+#define WIN_DNSCLIENT  "Software\\Policies\\Microsoft\\System\\DNSClient"
 #define NAMESERVER     "NameServer"
 #define DHCPNAMESERVER "DhcpNameServer"
 #define DATABASEPATH   "DatabasePath"
 #define WIN_PATH_HOSTS  "\\hosts"
+#define SEARCHLIST_KEY "SearchList"
+#define PRIMARYDNSSUFFIX_KEY "PrimaryDNSSuffix"
+#define INTERFACES_KEY "Interfaces"
+#define DOMAIN_KEY     "Domain"
+#define DHCPDOMAIN_KEY "DhcpDomain"
 
 #elif defined(WATT32)
 
@@ -314,6 +320,9 @@ struct ares_channeldata {
 
   ares_sock_config_callback sock_config_cb;
   void *sock_config_cb_data;
+
+  const struct ares_socket_functions * sock_funcs;
+  void *sock_func_cb_data;
 };
 
 /* Memory management functions */
@@ -342,6 +351,8 @@ void ares__destroy_servers_state(ares_channel channel);
 long ares__tvdiff(struct timeval t1, struct timeval t2);
 #endif
 
+void ares__socket_close(ares_channel, ares_socket_t);
+
 #define ARES_SWAP_BYTE(a,b) \
   { unsigned char swapByte = *(a);  *(a) = *(b);  *(b) = swapByte; }
 

deps/c-ares/ares_process.3

@@ -18,15 +18,15 @@
 ares_process \- Process events for name resolution
 .SH SYNOPSIS
 .nf
-.B #include <ares.h>
-.PP
-.B void ares_process(ares_channel \fIchannel\fP, fd_set *\fIread_fds\fP,
-.B	fd_set *\fIwrite_fds\fP)
-.fi
-.PP
-.B void ares_process_fd(ares_channel \fIchannel\fP,
-.B      ares_socket_t \fIread_fd\fP,
-.B	ares_socket_t \fIwrite_fd\fP)
+#include <ares.h>
+
+void ares_process(ares_channel \fIchannel\fP,
+                  fd_set *\fIread_fds\fP,
+                  fd_set *\fIwrite_fds\fP)
+
+void ares_process_fd(ares_channel \fIchannel\fP,
+                     ares_socket_t \fIread_fd\fP,
+                     ares_socket_t \fIwrite_fd\fP)
 .fi
 .SH DESCRIPTION
 The \fBares_process(3)\fP function handles input/output events and timeouts
@@ -35,31 +35,26 @@ associated with queries pending on the name service channel identified by
 The file descriptor sets pointed to by \fIread_fds\fP and \fIwrite_fds\fP
 should have file descriptors set in them according to whether the file
 descriptors specified by \fIares_fds(3)\fP are ready for reading and writing.
-(The easiest way to determine this information is to invoke
-.B select
-with a timeout no greater than the timeout given by \fIares_timeout(3)\fP ).
-.PP
-The
-.B ares_process
-function will invoke callbacks for pending queries if they complete
-successfully or fail.
+(The easiest way to determine this information is to invoke \fBselect(3)\fP
+with a timeout no greater than the timeout given by \fIares_timeout(3)\fP).
+
+The \fBares_process(3)\fP function will invoke callbacks for pending queries
+if they complete successfully or fail.
 
 \fBares_process_fd(3)\fP works the same way but acts and operates only on the
 specific file descriptors (sockets) you pass in to the function. Use
-ARES_SOCKET_BAD for "no action". This function is of course provided to allow
-users of c-ares to void select() in their applications and within c-ares.
-.SS EXAMPLE
+ARES_SOCKET_BAD for "no action". This function is provided to allow users of
+c-ares to void \fIselect(3)\fP in their applications and within c-ares.
+.SH EXAMPLE
 The following code fragment waits for all pending queries on a channel
 to complete:
-.PP
-.RS
+
 .nf
 int nfds, count;
 fd_set readers, writers;
 struct timeval tv, *tvp;
 
-while (1)
-  {
+while (1) {
   FD_ZERO(&readers);
   FD_ZERO(&writers);
   nfds = ares_fds(channel, &readers, &writers);
@@ -68,9 +63,8 @@ while (1)
   tvp = ares_timeout(channel, NULL, &tv);
   count = select(nfds, &readers, &writers, NULL, tvp);
   ares_process(channel, &readers, &writers);
-  }
+}
 .fi
-.RE
 .SH SEE ALSO
 .BR ares_fds (3),
 .BR ares_timeout (3)

deps/c-ares/ares_set_local_dev.3

@@ -31,8 +31,8 @@ for the option to work.  If SO_BINDTODEVICE is not supported or the
 setsocktop call fails (probably because of permissions), the error is
 silently ignored.
 .SH SEE ALSO
-.BR ares_set_local_ipv4 (3)
-.BR ares_set_local_ipv6 (3)
+.BR ares_set_local_ip4 (3)
+.BR ares_set_local_ip6 (3)
 .SH NOTES
 This function was added in c-ares 1.7.4
 .SH AUTHOR

deps/c-ares/ares_timeout.3

@@ -18,43 +18,28 @@
 ares_timeout \- return maximum time to wait
 .SH SYNOPSIS
 .nf
-.B #include <ares.h>
-.PP
-.B struct timeval *ares_timeout(ares_channel \fIchannel\fP,
-.B	struct timeval *\fImaxtv\fP, struct timeval *\fItv\fP)
+#include <ares.h>
+
+struct timeval *ares_timeout(ares_channel \fIchannel\fP,
+                             struct timeval *\fImaxtv\fP,
+                             struct timeval *\fItv\fP)
 .fi
 .SH DESCRIPTION
-The
-.B ares_timeout
-function determines the maximum time for which the caller should wait before
-invoking \fIares_process(3)\fP to process timeouts.  The parameter
-.I maxtv
-specifies a existing maximum timeout, or
-.B NULL
+The \fBares_timeout(3)\fP function determines the maximum time for which the
+caller should wait before invoking \fIares_process(3)\fP to process timeouts.
+The parameter \fImaxtv\fP specifies a existing maximum timeout, or \fBNULL\fP
 if the caller does not wish to apply a maximum timeout.  The parameter
-.I tv
-must point to a writable buffer of type
-.BR "struct timeval" .
-It is valid for
-.I maxtv
-and
-.I tv
-to have the same value.
-.PP
-If no queries have timeouts pending sooner than the given maximum
-timeout,
-.B ares_timeout
-returns the value of
-.IR maxtv;
-otherwise
-.B ares_timeout
-stores the appropriate timeout value into the buffer pointed to by
-.I tv
-and returns the value of
-.IR tv .
+\fItv\fP must point to a writable buffer of type \fBstruct timeval\fP It is
+valid for \fImaxtv\fP and \fItv\fP to have the same value.
+
+If no queries have timeouts pending sooner than the given maximum timeout,
+\fBares_timeout(3)\fP returns the value of \fImaxtv\fP; otherwise
+\fBares_timeout(3)\fP stores the appropriate timeout value into the buffer
+pointed to by \fItv\fP and returns the value of \fItv\fP.
 .SH SEE ALSO
 .BR ares_fds (3),
-.BR ares_process (3)
+.BR ares_process (3),
+.BR ares_process_fd (3)
 .SH AUTHOR
 Greg Hudson, MIT Information Systems
 .br

deps/c-ares/ares_version.3

@@ -18,23 +18,18 @@
 ares_version \- Get the version number of the library
 .SH SYNOPSIS
 .nf
-.B #include <ares.h>
-.PP
-.B const char *ares_version(int *\fIversion\fP)
+#include <ares.h>
+
+const char *ares_version(int *\fIversion\fP)
 .fi
 .SH DESCRIPTION
-The
-.B ares_version
-function gets the library version as a string and optionally as an integer
-stored in the
-.IR version ,
-argument. If you pass a NULL, no integer is attempted to be returned.
+The \fBares_version(3)\fP function gets the library version as a string and
+optionally as an integer stored in the \fIversion\fP argument. If you pass a
+NULL, no integer is attempted to be returned.
 
 The integer is built up as 24bit number, with 8 separate bits used for major
 number, minor number and patch number. This makes a version string such as
 1.2.3 will be returned as the hexadecimal number 0x010203 (decimal 66051).
-.SH NOTES
-This function is not compatible with ares.
-.SH AUTHOR
-Daniel Stenberg
-
+.SH "SEE ALSO"
+.BR ares_init (3),
+.BR ares_library_init (3)

deps/c-ares/ares_version.h

@@ -6,12 +6,12 @@
 #define ARES_COPYRIGHT "2004 - 2016 Daniel Stenberg, <daniel@haxx.se>."
 
 #define ARES_VERSION_MAJOR 1
-#define ARES_VERSION_MINOR 12
+#define ARES_VERSION_MINOR 13
 #define ARES_VERSION_PATCH 0
 #define ARES_VERSION ((ARES_VERSION_MAJOR<<16)|\
                        (ARES_VERSION_MINOR<<8)|\
                        (ARES_VERSION_PATCH))
-#define ARES_VERSION_STR "1.12.0"
+#define ARES_VERSION_STR "1.13.0"
 
 #if (ARES_VERSION >= 0x010700)
 #  define CARES_HAVE_ARES_LIBRARY_INIT 1

deps/c-ares/ares_writev.c

@@ -25,12 +25,12 @@
 #include "ares_private.h"
 
 #ifndef HAVE_WRITEV
-ssize_t ares_writev(ares_socket_t s, const struct iovec *iov, int iovcnt)
+ares_ssize_t ares_writev(ares_socket_t s, const struct iovec *iov, int iovcnt)
 {
   char *buffer, *bp;
   int i;
   size_t bytes = 0;
-  ssize_t result;
+  ares_ssize_t result;
 
   /* Validate iovcnt */
   if (iovcnt <= 0)

deps/c-ares/ares_writev.h

@@ -29,7 +29,7 @@ struct iovec
   size_t iov_len;  /* Length of data.  */
 };
 
-extern ssize_t ares_writev(ares_socket_t s, const struct iovec *iov, int iovcnt);
+extern ares_ssize_t ares_writev(ares_socket_t s, const struct iovec *iov, int iovcnt);
 
 #endif
 

deps/c-ares/config-dos.h

@@ -60,11 +60,6 @@
 
 #define BSD
 
-#if defined(__HIGHC__) || \
-    (defined(__GNUC__) && (__GNUC__ < 4))
-  #define ssize_t  int
-#endif
-
 /* Target HAVE_x section */
 
 #if defined(DJGPP)

deps/c-ares/config-win32.h

@@ -216,20 +216,6 @@
 #define HAVE_BOOL_T
 #endif
 
-/* Define if ssize_t is not an available 'typedefed' type. */
-#ifndef _SSIZE_T_DEFINED
-#  if (defined(__WATCOMC__) && (__WATCOMC__ >= 1240)) || \
-      defined(__POCC__) || \
-      defined(__MINGW32__)
-#  elif defined(_WIN64)
-#    define _SSIZE_T_DEFINED
-#    define ssize_t __int64
-#  else
-#    define _SSIZE_T_DEFINED
-#    define ssize_t int
-#  endif
-#endif
-
 /* ---------------------------------------------------------------- */
 /*                            TYPE SIZES                            */
 /* ---------------------------------------------------------------- */
@@ -259,31 +245,19 @@
 #  define _CRT_NONSTDC_NO_DEPRECATE 1
 #endif
 
-/* Officially, Microsoft's Windows SDK versions 6.X do not support Windows
-   2000 as a supported build target. VS2008 default installations provide
-   an embedded Windows SDK v6.0A along with the claim that Windows 2000 is
-   a valid build target for VS2008. Popular belief is that binaries built
-   with VS2008 using Windows SDK versions 6.X and Windows 2000 as a build
-   target are functional. */
-#if defined(_MSC_VER) && (_MSC_VER >= 1500)
-#  define VS2008_MIN_TARGET 0x0500
-#endif
-
-/* When no build target is specified VS2008 default build target is Windows
-   Vista, which leaves out even Winsows XP. If no build target has been given
-   for VS2008 we will target the minimum Officially supported build target,
-   which happens to be Windows XP. */
+/* Set the Target to Vista. However, any symbols required above Win2000 
+ * should be loaded via LoadLibrary() */
 #if defined(_MSC_VER) && (_MSC_VER >= 1500)
-#  define VS2008_DEF_TARGET  0x0501
+#  define VS2008_MIN_TARGET 0x0600
 #endif
 
 /* VS2008 default target settings and minimum build target check. */
 #if defined(_MSC_VER) && (_MSC_VER >= 1500)
 #  ifndef _WIN32_WINNT
-#    define _WIN32_WINNT VS2008_DEF_TARGET
+#    define _WIN32_WINNT VS2008_MIN_TARGET
 #  endif
 #  ifndef WINVER
-#    define WINVER VS2008_DEF_TARGET
+#    define WINVER VS2008_MIN_TARGET
 #  endif
 #  if (_WIN32_WINNT < VS2008_MIN_TARGET) || (WINVER < VS2008_MIN_TARGET)
 #    error VS2008 does not support Windows build targets prior to Windows 2000
@@ -291,13 +265,13 @@
 #endif
 
 /* When no build target is specified Pelles C 5.00 and later default build
-   target is Windows Vista. We override default target to be Windows 2000. */
+   target is Windows Vista. */
 #if defined(__POCC__) && (__POCC__ >= 500)
 #  ifndef _WIN32_WINNT
-#    define _WIN32_WINNT 0x0500
+#    define _WIN32_WINNT 0x0600
 #  endif
 #  ifndef WINVER
-#    define WINVER 0x0500
+#    define WINVER 0x0600
 #  endif
 #endif
 

deps/c-ares/configure

 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for c-ares 1.12.0.
+# Generated by GNU Autoconf 2.69 for c-ares 1.13.0.
 #
 # Report bugs to <c-ares mailing list: http://cool.haxx.se/mailman/listinfo/c-ares>.
 #
@@ -824,8 +824,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='c-ares'
 PACKAGE_TARNAME='c-ares'
-PACKAGE_VERSION='1.12.0'
-PACKAGE_STRING='c-ares 1.12.0'
+PACKAGE_VERSION='1.13.0'
+PACKAGE_STRING='c-ares 1.13.0'
 PACKAGE_BUGREPORT='c-ares mailing list: http://cool.haxx.se/mailman/listinfo/c-ares'
 PACKAGE_URL=''
 
@@ -1619,7 +1619,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures c-ares 1.12.0 to adapt to many kinds of systems.
+\`configure' configures c-ares 1.13.0 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1690,7 +1690,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of c-ares 1.12.0:";;
+     short | recursive ) echo "Configuration of c-ares 1.13.0:";;
    esac
   cat <<\_ACEOF
 
@@ -1831,7 +1831,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-c-ares configure 1.12.0
+c-ares configure 1.13.0
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -2412,7 +2412,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by c-ares $as_me 1.12.0, which was
+It was created by c-ares $as_me 1.13.0, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -3202,7 +3202,8 @@ if test -z "$EGREP" || test "$EGREP" = "not_found"; then
 fi
 
 
-if test -n "$ac_tool_prefix"; then
+if test -z "$AR"; then
+    if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}ar", so it can be a program name with args.
 set dummy ${ac_tool_prefix}ar; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
@@ -3302,8 +3303,9 @@ else
   AR="$ac_cv_path_AR"
 fi
 
-if test -z "$AR" || test "$AR" = "not_found"; then
+  if test -z "$AR" || test "$AR" = "not_found"; then
     as_fn_error $? "ar not found in PATH. Cannot continue without ar." "$LINENO" 5
+  fi
 fi
 
 
@@ -5944,7 +5946,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='c-ares'
- VERSION='1.12.0'
+ VERSION='1.13.0'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -22107,6 +22109,7 @@ _ACEOF
       ;;
   esac
 
+    CPPFLAGS="$CPPFLAGS -D_WIN32_WINNT=0x0600"
     ;;
   *)
     ac_cv_header_winsock_h="no"
@@ -22904,7 +22907,91 @@ $as_echo "$tst_connect_need_LIBS" >&6; }
   esac
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether time.h and sys/time.h may both be included" >&5
+if test "x$host_vendor" = "xapple"; then :
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for iOS minimum version 10 or later" >&5
+$as_echo_n "checking for iOS minimum version 10 or later... " >&6; }
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+
+#include <stdio.h>
+#include <TargetConditionals.h>
+
+int main (void)
+{
+
+#if TARGET_OS_IPHONE == 0 || __IPHONE_OS_VERSION_MIN_REQUIRED < 100000
+#error Not iOS 10 or later
+#endif
+return 0;
+
+ ;
+ return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+    ac_cv_ios_10="yes"
+
+else
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+fi
+
+if test "x$host_vendor" = "xapple"; then :
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for macOS minimum version 10.12 or later" >&5
+$as_echo_n "checking for macOS minimum version 10.12 or later... " >&6; }
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+
+#include <stdio.h>
+#include <TargetConditionals.h>
+
+int main (void)
+{
+
+#ifndef MAC_OS_X_VERSION_10_12
+#  define MAC_OS_X_VERSION_10_12 101200
+#endif
+#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
+#error Not macOS 10.12 or later
+#endif
+return 0;
+
+ ;
+ return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+    ac_cv_macos_10_12="yes"
+
+else
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+fi
+
+if test "x$host_vendor" != "xapple" || test "x$ac_cv_ios_10" = "xyes" || test "x$ac_cv_macos_10_12" = "xyes"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether time.h and sys/time.h may both be included" >&5
 $as_echo_n "checking whether time.h and sys/time.h may both be included... " >&6; }
 if ${ac_cv_header_time+:} false; then :
   $as_echo_n "(cached) " >&6
@@ -23160,6 +23247,7 @@ _ACEOF
   fi
   #
 
+fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to use libgcc" >&5
 $as_echo_n "checking whether to use libgcc... " >&6; }
@@ -23794,12 +23882,17 @@ fi
 # check for ssize_t
 ac_fn_c_check_type "$LINENO" "ssize_t" "ac_cv_type_ssize_t" "$ac_includes_default"
 if test "x$ac_cv_type_ssize_t" = xyes; then :
-
+   CARES_TYPEOF_ARES_SSIZE_T=ssize_t
 else
+   CARES_TYPEOF_ARES_SSIZE_T=int
+fi
 
-$as_echo "#define ssize_t int" >>confdefs.h
 
-fi
+
+cat >>confdefs.h <<_ACEOF
+#define CARES_TYPEOF_ARES_SSIZE_T ${CARES_TYPEOF_ARES_SSIZE_T}
+_ACEOF
+
 
 
 # check for bool type
@@ -32470,7 +32563,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by c-ares $as_me 1.12.0, which was
+This file was extended by c-ares $as_me 1.13.0, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -32536,7 +32629,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-c-ares config.status 1.12.0
+c-ares config.status 1.13.0
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 

deps/c-ares/configure.ac

 AC_PREREQ(2.57)
 
 dnl Version not hardcoded here. Fetched later from ares_version.h
-AC_INIT([c-ares], [1.12.0],
+AC_INIT([c-ares], [1.13.0],
   [c-ares mailing list: http://cool.haxx.se/mailman/listinfo/c-ares])
 
 XC_OVR_ZZ50
@@ -59,10 +59,13 @@ AC_SUBST([EGREP])
 
 dnl AR is mandatory for configure process and libtool.
 dnl This is target dependent, so check it as a tool.
-AC_PATH_TOOL([AR], [ar], [not_found],
+if test -z "$AR"; then
+  dnl allow it to be overridden
+  AC_PATH_TOOL([AR], [ar], [not_found],
     [$PATH:/usr/bin:/usr/local/bin])
-if test -z "$AR" || test "$AR" = "not_found"; then
+  if test -z "$AR" || test "$AR" = "not_found"; then
     AC_MSG_ERROR([ar not found in PATH. Cannot continue without ar.])
+  fi
 fi
 AC_SUBST([AR])
 
@@ -194,6 +197,7 @@ case X-"$ac_cv_native_windows" in
     CURL_CHECK_HEADER_WINSOCK
     CURL_CHECK_HEADER_WINSOCK2
     CURL_CHECK_HEADER_WS2TCPIP
+    CPPFLAGS="$CPPFLAGS -D_WIN32_WINNT=0x0600"
     ;;
   *)
     ac_cv_header_winsock_h="no"
@@ -388,11 +392,62 @@ ac_cv_func_strcasecmp="no"
 
 CARES_CHECK_LIBS_CONNECT
 
+dnl iOS 10?
+AS_IF([test "x$host_vendor" = "xapple"], [
+  AC_MSG_CHECKING([for iOS minimum version 10 or later])
+  AC_COMPILE_IFELSE([
+    AC_LANG_PROGRAM([[
+#include <stdio.h>
+#include <TargetConditionals.h>
+    ]], [[
+#if TARGET_OS_IPHONE == 0 || __IPHONE_OS_VERSION_MIN_REQUIRED < 100000
+#error Not iOS 10 or later
+#endif
+return 0;
+   ]])
+  ],[
+    AC_MSG_RESULT([yes])
+    ac_cv_ios_10="yes"
+  ],[
+    AC_MSG_RESULT([no])
+  ])
+])
+
+dnl macOS 10.12?
+AS_IF([test "x$host_vendor" = "xapple"], [
+  AC_MSG_CHECKING([for macOS minimum version 10.12 or later])
+  AC_COMPILE_IFELSE([
+    AC_LANG_PROGRAM([[
+#include <stdio.h>
+#include <TargetConditionals.h>
+    ]], [[
+#ifndef MAC_OS_X_VERSION_10_12
+#  define MAC_OS_X_VERSION_10_12 101200
+#endif
+#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
+#error Not macOS 10.12 or later
+#endif
+return 0;
+   ]])
+  ],[
+    AC_MSG_RESULT([yes])
+    ac_cv_macos_10_12="yes"
+  ],[
+    AC_MSG_RESULT([no])
+  ])
+])
+
 dnl **********************************************************************
 dnl In case that function clock_gettime with monotonic timer is available,
 dnl check for additional required libraries.
 dnl **********************************************************************
-CURL_CHECK_LIBS_CLOCK_GETTIME_MONOTONIC
+dnl Xcode 8 bug: iOS when targeting less than 10, or macOS when targeting less than 10.12 will
+dnl say clock_gettime exists, it is a weak symbol that only exists in iOS 10 or macOS 10.12 and will
+dnl cause a crash at runtime when running on older versions.  Skip finding CLOCK_MONOTONIC on older
+dnl Apple OS's.
+if test "x$host_vendor" != "xapple" || test "x$ac_cv_ios_10" = "xyes" || test "x$ac_cv_macos_10_12" = "xyes"; then
+  CURL_CHECK_LIBS_CLOCK_GETTIME_MONOTONIC
+fi
 
 AC_MSG_CHECKING([whether to use libgcc])
 AC_ARG_ENABLE(libgcc,
@@ -505,8 +560,12 @@ fi
 
 
 # check for ssize_t
-AC_CHECK_TYPE(ssize_t, ,
-   AC_DEFINE(ssize_t, int, [the signed version of size_t]))
+AC_CHECK_TYPE(ssize_t, [ CARES_TYPEOF_ARES_SSIZE_T=ssize_t ],
+  [ CARES_TYPEOF_ARES_SSIZE_T=int ])
+
+AC_DEFINE_UNQUOTED([CARES_TYPEOF_ARES_SSIZE_T], ${CARES_TYPEOF_ARES_SSIZE_T},
+  [the signed version of size_t])
+
 
 # check for bool type
 AC_CHECK_TYPE([bool],[

deps/c-ares/inet_net_pton.c

@@ -357,8 +357,8 @@ inet_net_pton_ipv6(const char *src, unsigned char *dst, size_t size)
      * Since some memmove()'s erroneously fail to handle
      * overlapping regions, we'll do the shift by hand.
      */
-    const ssize_t n = tp - colonp;
-    ssize_t i;
+    const ares_ssize_t n = tp - colonp;
+    ares_ssize_t i;
 
     if (tp == endp)
       goto enoent;

deps/c-ares/setup_once.h

@@ -131,7 +131,7 @@ struct timeval {
 
 #if defined(__minix)
 /* Minix doesn't support recv on TCP sockets */
-#define sread(x,y,z) (ssize_t)read((RECV_TYPE_ARG1)(x), \
+#define sread(x,y,z) (ares_ssize_t)read((RECV_TYPE_ARG1)(x), \
                                    (RECV_TYPE_ARG2)(y), \
                                    (RECV_TYPE_ARG3)(z))
 
@@ -167,7 +167,7 @@ struct timeval {
   Error Missing_definition_of_return_and_arguments_types_of_recv
   /* */
 #else
-#define sread(x,y,z) (ssize_t)recv((RECV_TYPE_ARG1)(x), \
+#define sread(x,y,z) (ares_ssize_t)recv((RECV_TYPE_ARG1)(x), \
                                    (RECV_TYPE_ARG2)(y), \
                                    (RECV_TYPE_ARG3)(z), \
                                    (RECV_TYPE_ARG4)(0))
@@ -183,7 +183,7 @@ struct timeval {
 
 #if defined(__minix)
 /* Minix doesn't support send on TCP sockets */
-#define swrite(x,y,z) (ssize_t)write((SEND_TYPE_ARG1)(x), \
+#define swrite(x,y,z) (ares_ssize_t)write((SEND_TYPE_ARG1)(x), \
                                     (SEND_TYPE_ARG2)(y), \
                                     (SEND_TYPE_ARG3)(z))
 
@@ -198,7 +198,7 @@ struct timeval {
   Error Missing_definition_of_return_and_arguments_types_of_send
   /* */
 #else
-#define swrite(x,y,z) (ssize_t)send((SEND_TYPE_ARG1)(x), \
+#define swrite(x,y,z) (ares_ssize_t)send((SEND_TYPE_ARG1)(x), \
                                     (SEND_TYPE_ARG2)(y), \
                                     (SEND_TYPE_ARG3)(z), \
                                     (SEND_TYPE_ARG4)(SEND_4TH_ARG))
@@ -228,7 +228,7 @@ struct timeval {
   Error Missing_definition_of_return_and_arguments_types_of_recvfrom
   /* */
 #else
-#define sreadfrom(s,b,bl,f,fl) (ssize_t)recvfrom((RECVFROM_TYPE_ARG1)  (s),  \
+#define sreadfrom(s,b,bl,f,fl) (ares_ssize_t)recvfrom((RECVFROM_TYPE_ARG1)  (s),  \
                                                  (RECVFROM_TYPE_ARG2 *)(b),  \
                                                  (RECVFROM_TYPE_ARG3)  (bl), \
                                                  (RECVFROM_TYPE_ARG4)  (0),  \

setup.py

@@ -187,7 +187,7 @@ if os.getenv('READTHEDOCS'):
 try:
     run_setup(EXT_MODULES, run_make=_BUILDING)
 except BuildFailed:
-    if ARES not in EXT_MODULES:
+    if ARES not in EXT_MODULES or not ARES.optional:
         raise
     EXT_MODULES.remove(ARES)
     run_setup(EXT_MODULES, run_make=_BUILDING)