Squashed 'Sources/OpenVPNAdapter/Libraries/Vendors/openvpn/' content from commit 554d8b888

git-subtree-dir: Sources/OpenVPNAdapter/Libraries/Vendors/openvpn git-subtree-split: 554d8b88817d3a7b836e78940ed61bb11ed2bd9b
2026-04-24 00:00:05 +08:00 · 2018-07-27 18:08:58 +03:00
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+//    OpenVPN -- An application to securely tunnel IP networks
+//               over a single port, with support for SSL/TLS-based
+//               session authentication and key exchange,
+//               packet encryption, packet authentication, and
+//               packet compression.
+//
+//    Copyright (C) 2012-2017 OpenVPN Inc.
+//
+//    This program is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Affero General Public License Version 3
+//    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 Affero General Public License for more details.
+//
+//    You should have received a copy of the GNU Affero General Public License
+//    along with this program in the COPYING file.
+//    If not, see <http://www.gnu.org/licenses/>.
+
+// Emulate Excluded Routes implementation (needed by Android)
+
+#ifndef OPENVPN_CLIENT_CLIEMUEXR_H
+#define OPENVPN_CLIENT_CLIEMUEXR_H
+
+#include <openvpn/common/exception.hpp>
+#include <openvpn/tun/client/emuexr.hpp>
+#include <openvpn/addr/routeinv.hpp>
+
+namespace openvpn {
+  class EmulateExcludeRouteImpl : public EmulateExcludeRoute
+  {
+  public:
+    OPENVPN_EXCEPTION(emulate_exclude_route_error);
+
+    typedef RCPtr<EmulateExcludeRouteImpl> Ptr;
+
+    EmulateExcludeRouteImpl(const bool exclude_server_address)
+      : exclude_server_address_(exclude_server_address)
+    {
+    }
+
+  private:
+    virtual void add_route(const bool add, const IP::Addr& addr, const int prefix_len)
+    {
+      (add ? include : exclude).emplace_back(addr, prefix_len);
+    }
+
+    virtual bool enabled(const IPVerFlags& ipv) const
+    {
+      return exclude.size() && (ipv.rgv4() || ipv.rgv6());
+    }
+
+    virtual void emulate(TunBuilderBase* tb, IPVerFlags& ipv, const IP::Addr& server_addr) const
+    {
+      const unsigned int rg_ver_flags = ipv.rg_ver_flags();
+      if (exclude.size() && rg_ver_flags)
+	{
+	  IP::RouteList rl;
+	  rl.reserve(include.size() + exclude.size());
+	  rl.insert(rl.end(), include.begin(), include.end());
+	  rl.insert(rl.end(), exclude.begin(), exclude.end());
+
+	  if (exclude_server_address_ && (server_addr.version_mask() & rg_ver_flags))
+	    rl.emplace_back(server_addr, server_addr.size());
+
+	  const IP::RouteInverter ri(rl, rg_ver_flags);
+	  OPENVPN_LOG("Exclude routes emulation:\n" << ri);
+	  for (IP::RouteInverter::const_iterator i = ri.begin(); i != ri.end(); ++i)
+	    {
+	      const IP::Route& r = *i;
+	      if (!tb->tun_builder_add_route(r.addr.to_string(), r.prefix_len, -1, r.addr.version() == IP::Addr::V6))
+		throw emulate_exclude_route_error("tun_builder_add_route failed");
+	    }
+
+	  ipv.set_emulate_exclude_routes();
+	}
+    }
+
+    const bool exclude_server_address_;
+    IP::RouteList include;
+    IP::RouteList exclude;
+  };
+
+  class EmulateExcludeRouteFactoryImpl : public EmulateExcludeRouteFactory
+  {
+  public:
+    typedef RCPtr<EmulateExcludeRouteFactoryImpl> Ptr;
+
+    EmulateExcludeRouteFactoryImpl(const bool exclude_server_address)
+      : exclude_server_address_(exclude_server_address)
+    {
+    }
+
+  private:
+    virtual EmulateExcludeRoute::Ptr new_obj() const
+    {
+      return EmulateExcludeRoute::Ptr(new EmulateExcludeRouteImpl(exclude_server_address_));
+    }
+
+    const bool exclude_server_address_;
+  };
+}
+
+#endif