Squashed 'Sources/OpenVPNAdapter/Libraries/Vendors/openvpn/' changes from 554d8b888..cc90cde57

cc90cde57 win: use 'MSVC 2017 Professional' as default compiler
4b072bce1 [OVPN3-311] function.hpp: fix Windows build
48b9b78de [OVPN3-310] logging: fix 'OPENVPN_LOG_NTNL': identifier not found
5a4a87552 cosmetics: helper function to check registry errors
fc52fd8a5 [OC-78] proxy: support PROXY_AUTO_CONFIG_URL on Windows
f5178cff9 [OC-77] proxy: refactor proxy settings code
18e50ec3f ReplyParser: added undefined status
8178ae06f unix file utils: added update_file_mod_time_nanoseconds()
8f20f7693 build: use LZ4_SYS=1 default when target is Linux
4bd996e61 timestr: added date_time_utc() and nanosec_time_to_string()
0eaa2586f string: added remove_spaces() method
d47ae03cc OptionList: added get_c_str() method
1eb9cd657 unix file utils: added mtime_ns parameter to write_binary_unix() and write_binary_atomic()
bf00c6e3e Time::delta_str(): use "INF" to denote infinite time
0e598a87b kovpn.hpp: asio must be included before sys/ and linux/ headers to avoid redefinition conflicts
1d2ce460d BufferType: added read_alloc_buf() method
148ae6085 BufferType: added reset_offset() method
6218ed618 Factor out IP::random_addr_v4() and IP::random_addr_v6() from IP::random_addr().
5468670b9 pool: minor changes
36a885a82 route: allow for specialized IPv4/v6 RouteType
5e29e6628 BufferType: added typedef T value_type
d92021c99 strerror.hpp: added #include <errno.h> for benefit of users
363cbece3 Function: misc cleanup
d88435ecd IP::Route: added defined() method
3371cb745 kovpn.hpp: fix centos build with DCO enabled
dc9e48d98 Fix bug in macos tunnel interface setup. Second ip address should be gateway address
bcdb27993 Merged in schwabe/fix_clang_warnings (pull request #25)
ede5e90ff Merged in schabe/fix_swig_ipadr (pull request #27)
c0d580d24 Merged in schwabe/fix_openvpn_extern (pull request #26)
0965882e5 Merged in schwabe/stats_morecpus (pull request #23)
5f1f8470b Revert bugfix for not compiling IA32 ASM of 2.7.5
bde2c41be dep: switch from mbeTLS 2.7.0 to 2.7.5
9d06b5c97 [OC-77] proxy: support PROXY_AUTO_CONFIG_URL on macOS
3f2ad8e8c Hide const std::string IP methods from SWIG
ba264862a Send also kovpn statistics of CPU Cores >= 16 via status message
2991d38b3 Fix warnings reported by LLVM/Clang
02d2a7975 Fix multiple inclusion of OpenVPN3 header with OPENPVN_EXTERN

git-subtree-dir: Sources/OpenVPNAdapter/Libraries/Vendors/openvpn
git-subtree-split: cc90cde5769dcf9e13fdd9e85d6d0857963dabce

openvpn/common/fileunix.hpp

@@ -35,12 +35,14 @@
 #include <sys/types.h> // for lseek, open
 #include <sys/stat.h>  // for open
 #include <fcntl.h>     // for open
+#include <cstdint>
 
 #include <openvpn/common/exception.hpp>
 #include <openvpn/common/size.hpp>
 #include <openvpn/common/scoped_fd.hpp>
 #include <openvpn/common/write.hpp>
 #include <openvpn/common/strerror.hpp>
+#include <openvpn/common/modstat.hpp>
 #include <openvpn/buffer/bufread.hpp>
 
 namespace openvpn {
@@ -49,6 +51,7 @@ namespace openvpn {
   // write binary buffer to file
   inline void write_binary_unix(const std::string& fn,
 				const mode_t mode,
+				const std::uint64_t mtime_ns,  // set explicit modification-time in nanoseconds since epoch, or 0 to defer to system
 				const void *buf,
 				const size_t size)
   {
@@ -61,11 +64,16 @@ namespace openvpn {
       }
 
     // write
-    {
-      const ssize_t len = write_retry(fd(), buf, size);
-      if (len != size)
-	throw file_unix_error(fn + " : incomplete write");
-    }
+    if (size)
+      {
+	const ssize_t len = write_retry(fd(), buf, size);
+	if (len != size)
+	  throw file_unix_error(fn + " : incomplete write");
+      }
+
+    // explicit modification time
+    if (mtime_ns)
+      update_file_mod_time_nanoseconds(fd(), mtime_ns);
 
     // close
     {
@@ -77,23 +85,26 @@ namespace openvpn {
 
   inline void write_binary_unix(const std::string& fn,
 				const mode_t mode,
+				const std::uint64_t mtime_ns,
 				const Buffer& buf)
   {
-    write_binary_unix(fn, mode, buf.c_data(), buf.size());
+    write_binary_unix(fn, mode, mtime_ns, buf.c_data(), buf.size());
   }
 
   inline void write_binary_unix(const std::string& fn,
 				const mode_t mode,
+				const std::uint64_t mtime_ns,
 				const ConstBuffer& buf)
   {
-    write_binary_unix(fn, mode, buf.c_data(), buf.size());
+    write_binary_unix(fn, mode, mtime_ns, buf.c_data(), buf.size());
   }
 
   inline void write_text_unix(const std::string& fn,
 			      const mode_t mode,
+			      const std::uint64_t mtime_ns,
 			      const std::string& content)
   {
-    write_binary_unix(fn, mode, content.c_str(), content.length());
+    write_binary_unix(fn, mode, mtime_ns, content.c_str(), content.length());
   }
 
   enum { // MUST be distinct from BufferAllocated flags