Imported Upstream version 2.3.10upstream/2.3.10

1 files changed, 54 insertions, 14 deletions

diff --git a/src/openvpn/init.c b/src/openvpn/init.c
index 71c91a2..2148777 100644
--- a/src/openvpn/init.c
+++ b/src/openvpn/init.c
@@ -840,7 +840,7 @@ void
 init_options_dev (struct options *options)
 {
   if (!options->dev && options->dev_node) {
-    char *dev_node = strdup(options->dev_node); /* POSIX basename() implementaions may modify its arguments */
+    char *dev_node = string_alloc(options->dev_node, NULL); /* POSIX basename() implementaions may modify its arguments */
     options->dev = basename (dev_node);
   }
 }
@@ -973,31 +973,30 @@ do_uid_gid_chroot (struct context *c, bool no_delay)
   static const char why_not[] = "will be delayed because of --client, --pull, or --up-delay";
   struct context_0 *c0 = c->c0;
 
-  if (c->first_time && c0 && !c0->uid_gid_set)
+  if (c0 && !c0->uid_gid_chroot_set)
     {
       /* chroot if requested */
       if (c->options.chroot_dir)
 	{
 	  if (no_delay)
 	    platform_chroot (c->options.chroot_dir);
-	  else
+	  else if (c->first_time)
 	    msg (M_INFO, "NOTE: chroot %s", why_not);
 	}
 
-      /* set user and/or group that we want to setuid/setgid to */
-      if (no_delay)
-	{
-	  platform_group_set (&c0->platform_state_group);
-	  platform_user_set (&c0->platform_state_user);
-	  c0->uid_gid_set = true;
-	}
-      else if (c0->uid_gid_specified)
+      /* set user and/or group if we want to setuid/setgid */
+      if (c0->uid_gid_specified)
 	{
-	  msg (M_INFO, "NOTE: UID/GID downgrade %s", why_not);
+	  if (no_delay) {
+	    platform_group_set (&c0->platform_state_group);
+	    platform_user_set (&c0->platform_state_user);
+	  }
+	  else if (c->first_time)
+	    msg (M_INFO, "NOTE: UID/GID downgrade %s", why_not);
 	}
 
 #ifdef ENABLE_MEMSTATS
-      if (c->options.memstats_fn)
+      if (c->first_time && c->options.memstats_fn)
 	mstats_open(c->options.memstats_fn);
 #endif
 
@@ -1016,10 +1015,16 @@ do_uid_gid_chroot (struct context *c, bool no_delay)
 	    else
 	      msg (M_INFO, "setcon to '%s' succeeded", c->options.selinux_context);
 	  }
-	  else
+	  else if (c->first_time)
 	    msg (M_INFO, "NOTE: setcon %s", why_not);
 	}
 #endif
+
+      /* Privileges are going to be dropped by now (if requested), be sure
+       * to prevent any future privilege dropping attempts from now on.
+       */
+      if (no_delay)
+	c0->uid_gid_chroot_set = true;
     }
 }
 
@@ -1453,6 +1458,9 @@ do_open_tun (struct context *c)
 		   c->plugins,
 		   OPENVPN_PLUGIN_UP,
 		   c->c1.tuntap->actual_name,
+#ifdef WIN32
+		   c->c1.tuntap->adapter_index,
+#endif
 		   dev_type_string (c->options.dev, c->options.dev_type),
 		   TUN_MTU_SIZE (&c->c2.frame),
 		   EXPANDED_SIZE (&c->c2.frame),
@@ -1463,6 +1471,15 @@ do_open_tun (struct context *c)
 		   "up",
 		   c->c2.es);
 
+#ifdef WIN32
+      if (c->options.block_outside_dns)
+      {
+        dmsg (D_LOW, "Blocking outside DNS");
+        if (!win_wfp_block_dns(c->c1.tuntap->adapter_index))
+            msg (M_FATAL, "Blocking DNS failed!");
+      }
+#endif
+
       /* possibly add routes */
       if (!c->options.route_delay_defined)
 	do_route (&c->options, c->c1.route_list, c->c1.route_ipv6_list,
@@ -1493,6 +1510,9 @@ do_open_tun (struct context *c)
 		     c->plugins,
 		     OPENVPN_PLUGIN_UP,
 		     c->c1.tuntap->actual_name,
+#ifdef WIN32
+		     c->c1.tuntap->adapter_index,
+#endif
 		     dev_type_string (c->options.dev, c->options.dev_type),
 		     TUN_MTU_SIZE (&c->c2.frame),
 		     EXPANDED_SIZE (&c->c2.frame),
@@ -1530,6 +1550,9 @@ do_close_tun (struct context *c, bool force)
   if (c->c1.tuntap && c->c1.tuntap_owned)
     {
       const char *tuntap_actual = string_alloc (c->c1.tuntap->actual_name, &gc);
+#ifdef WIN32
+      DWORD adapter_index = c->c1.tuntap->adapter_index;
+#endif
       const in_addr_t local = c->c1.tuntap->local;
       const in_addr_t remote_netmask = c->c1.tuntap->remote_netmask;
 
@@ -1553,6 +1576,9 @@ do_close_tun (struct context *c, bool force)
                            c->plugins,
                            OPENVPN_PLUGIN_ROUTE_PREDOWN,
                            tuntap_actual,
+#ifdef WIN32
+                           adapter_index,
+#endif
                            NULL,
                            TUN_MTU_SIZE (&c->c2.frame),
                            EXPANDED_SIZE (&c->c2.frame),
@@ -1578,6 +1604,9 @@ do_close_tun (struct context *c, bool force)
 		       c->plugins,
 		       OPENVPN_PLUGIN_DOWN,
 		       tuntap_actual,
+#ifdef WIN32
+		       adapter_index,
+#endif
 		       NULL,
 		       TUN_MTU_SIZE (&c->c2.frame),
 		       EXPANDED_SIZE (&c->c2.frame),
@@ -1589,6 +1618,14 @@ do_close_tun (struct context *c, bool force)
 		       "down",
 		       c->c2.es);
 
+#ifdef WIN32
+            if (c->options.block_outside_dns)
+            {
+                if (!win_wfp_uninit())
+                    msg (M_FATAL, "Uninitialising WFP failed!");
+            }
+#endif
+
 	  /* actually close tun/tap device based on --down-pre flag */
 	  if (c->options.down_pre)
 	    do_close_tun_simple (c);
@@ -1601,6 +1638,9 @@ do_close_tun (struct context *c, bool force)
 			 c->plugins,
 			 OPENVPN_PLUGIN_DOWN,
 			 tuntap_actual,
+#ifdef WIN32
+			 adapter_index,
+#endif
 			 NULL,
 			 TUN_MTU_SIZE (&c->c2.frame),
 			 EXPANDED_SIZE (&c->c2.frame),