Added "client-nat" option for stateless, one-to-one

NAT on the client side.

Version 2.1.3i.


git-svn-id: http://svn.openvpn.net/projects/openvpn/branches/BETA21/openvpn@6944 e7ae566f-a301-0410-adde-c780ea21d3b5

1 files changed, 65 insertions, 0 deletions

diff --git a/clinat.h b/clinat.h
new file mode 100644
index 0000000..d55a727
--- /dev/null
+++ b/clinat.h
@@ -0,0 +1,65 @@
+/*
+ *  OpenVPN -- An application to securely tunnel IP networks
+ *             over a single TCP/UDP port, with support for SSL/TLS-based
+ *             session authentication and key exchange,
+ *             packet encryption, packet authentication, and
+ *             packet compression.
+ *
+ *  Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program (see the file COPYING included with this
+ *  distribution); if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#if !defined(CLINAT_H) && defined(ENABLE_CLIENT_NAT)
+#define CLINAT_H
+
+#include "buffer.h"
+
+#define MAX_CLIENT_NAT 64
+
+#define CN_OUTGOING 0
+#define CN_INCOMING 1
+
+struct client_nat_entry {
+# define CN_SNAT 0
+# define CN_DNAT 1
+  int type;
+  in_addr_t network;
+  in_addr_t netmask;
+  in_addr_t foreign_network;
+};
+
+struct client_nat_option_list {
+  int n;
+  struct client_nat_entry entries[MAX_CLIENT_NAT];
+};
+
+struct client_nat_option_list *new_client_nat_list (struct gc_arena *gc);
+struct client_nat_option_list *clone_client_nat_option_list (const struct client_nat_option_list *src, struct gc_arena *gc);
+void copy_client_nat_option_list (struct client_nat_option_list *dest, const struct client_nat_option_list *src);
+void print_client_nat_list(const struct client_nat_option_list *list, int msglevel);
+
+void add_client_nat_to_option_list (struct client_nat_option_list *dest,
+				    const char *type,
+				    const char *network,
+				    const char *netmask,
+				    const char *foreign_network,
+				    int msglevel);
+
+void client_nat_transform (const struct client_nat_option_list *list,
+			   struct buffer *ipbuf,
+			   const int direction);
+
+#endif