This is highly system specific, as the content of the uname()
structure elements is not specified very well - uname(3) says:
release Release level of the operating system
which translates to "IV_PLAT_VER=13.3-RELEASE-p6" (FreeBSD) or
"IV_PLAT_VER=22.6.0" (macOS) - the latter being the "Mach Kernel
version", not what Apple calls the OS.
It's still useful if a server operator needs to keep track of
client versions (and the GUI does not set the corresponding
environment variable, which neither Tunnelblick nor NM do).
v2: manpage amendments
v3: whitespace
v4: reword manpage
Github: OpenVPN/openvpn#637
Change-Id: Id2b0c5a517f02e5c219fea2ae3ef2bdef7690169
Signed-off-by: Gert Doering <g...@greenie.muc.de>
Acked-by: Antonio Quartulli <a...@unstable.cc>
---
This change was reviewed on Gerrit and approved by at least one
developer. I request to merge it to master.
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/793
This mail reflects revision 4 of this Change.
Acked-by according to Gerrit (reflected above):
Antonio Quartulli <a...@unstable.cc>
diff --git a/doc/man-sections/client-options.rst
b/doc/man-sections/client-options.rst
index a06948e..5ca85e0 100644
--- a/doc/man-sections/client-options.rst
+++ b/doc/man-sections/client-options.rst
@@ -430,7 +430,10 @@
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
diff --git a/src/openvpn/ssl.c b/src/openvpn/ssl.c
index 8040e7b..93e31f1 100644
--- a/src/openvpn/ssl.c
+++ b/src/openvpn/ssl.c
@@ -2010,6 +2010,10 @@
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
}
diff --git a/src/openvpn/syshead.h b/src/openvpn/syshead.h
index 83a48fc..33a90c1 100644
--- a/src/openvpn/syshead.h
+++ b/src/openvpn/syshead.h
@@ -331,6 +331,10 @@
#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.
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