@@ -430,7 +430,10 @@ configuration.

         The version of the operating system, e.g. 6.1 for Windows 7.

         This may be set by the client UI/GUI using ``--setenv``.

         On Windows systems it is automatically determined by openvpn

-        itself.

+        itself.  On other platforms OpenVPN will default to sending

+        the information returned by the `uname()` system call in

+        the `release` field, which is usually the currently running

+        kernel version.  This is highly system specific, though.

   :code:`UV_<name>=<value>`

         Client environment variables whose names start with

@@ -2149,6 +2149,10 @@ push_peer_info(struct buffer *buf, struct tls_session *session)

             buf_printf(&out, "IV_SSL=%s\n", get_ssl_library_version() );

 #if defined(_WIN32)

             buf_printf(&out, "IV_PLAT_VER=%s\n", win32_version_string(&gc, false));

+#else

+            struct utsname u;

+            uname(&u);

+            buf_printf(&out, "IV_PLAT_VER=%s\n", u.release);

 #endif

         }

@@ -347,6 +347,10 @@ typedef int MIB_TCP_STATE;

 #include <sys/mman.h>

 #endif

+#ifndef _WIN32

+#include <sys/utsname.h>

+#endif

+

 /*

  * Pedantic mode is meant to accomplish lint-style program checking,

  * not to build a working executable.