push-update: support for mac

As with other platforms we just reopen tun
and apply resulting options.

OVPN3-1326

Signed-off-by: Lev Stipakov <lev@openvpn.net>

openvpn/tun/mac/client/tuncli.hpp

@@ -321,6 +321,25 @@ class Client : public TunClient
         stop_();
     }
 
+    void apply_push_update(const OptionList &opt, TransportClient &cli) override
+    {
+        stop_();
+        if (impl)
+        {
+            impl.reset();
+        }
+
+        // this has to be done in post, because we need to wait
+        // for all async tun read requests to complete
+        openvpn_io::post(io_context,
+                         [self = Ptr(this), opt, &cli]
+                         {
+                             OPENVPN_ASYNC_HANDLER;
+                             CryptoDCSettings c{};
+                             self->tun_start(opt, cli, c);
+                         });
+    }
+
   private:
     Client(openvpn_io::io_context &io_context_arg,
            ClientConfig *config_arg,