tun.c: set IPv4 address temporary on Windows

Use store=active to set IPv4 address temporary so that
it will be removed on reboot. This makes the behavior
consistent with deletion and IPv6, where we already use
store=active.

https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/netsh-interface

GitHub: fixes #915

Change-Id: I07311f397e6cd278b90c33f024e927c282cd03e4
Signed-off-by: Lev Stipakov <[email protected]>
Acked-by: Gert Doering <[email protected]>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1430
Message-Id: <[email protected]>
URL: https://www.mail-archive.com/[email protected]/msg34975.html
Signed-off-by: Gert Doering <[email protected]>

Author: lstipakov

src/openvpn/tun.c

@@ -5119,8 +5119,8 @@ netsh_ifconfig(const struct tuntap_options *to, DWORD adapter_index, const in_ad
         }
         else
         {
-            /* example: netsh interface ip set address 42 static 10.3.0.1 255.255.255.0 */
-            argv_printf(&argv, "%s%s interface ip set address %lu static %s %s", get_win_sys_path(),
+            /* example: netsh interface ip set address 42 static 10.3.0.1 255.255.255.0 store=active */
+            argv_printf(&argv, "%s%s interface ip set address %lu static %s %s store=active", get_win_sys_path(),
                         NETSH_PATH_SUFFIX, adapter_index, print_in_addr_t(ip, 0, &gc),
                         print_in_addr_t(netmask, 0, &gc));