1 files changed, 153 insertions, 0 deletions

diff --git a/src/service/vpn/vpn.h b/src/service/vpn/vpn.h
new file mode 100644
index 000000000..77cfd34e6
--- /dev/null
+++ b/src/service/vpn/vpn.h
@@ -0,0 +1,153 @@
+/*
+     This file is part of GNUnet.
+     Copyright (C) 2012 Christian Grothoff
+
+     GNUnet is free software: you can redistribute it and/or modify it
+     under the terms of the GNU Affero General Public License as published
+     by the Free Software Foundation, either version 3 of the License,
+     or (at your option) any later version.
+
+     GNUnet 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.  If not, see <http://www.gnu.org/licenses/>.
+
+     SPDX-License-Identifier: AGPL3.0-or-later
+ */
+
+/**
+ * @file vpn/vpn.h
+ * @brief IPC messages between VPN library and VPN service
+ * @author Christian Grothoff
+ */
+#ifndef VPN_H
+#define VPN_H
+
+#include "gnunet_util_lib.h"
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
+/**
+ * Message send by the VPN client to the VPN service requesting
+ * the setup of a redirection from some IP via an exit node to
+ * some global Internet address.
+ */
+struct RedirectToIpRequestMessage
+{
+  /**
+   * Type is #GNUNET_MESSAGE_TYPE_VPN_CLIENT_REDIRECT_TO_IP
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * Always zero.
+   */
+  uint32_t reserved GNUNET_PACKED;
+
+  /**
+   * How long should the redirection be maintained at most?
+   */
+  struct GNUNET_TIME_AbsoluteNBO expiration_time;
+
+  /**
+   * Address family desired for the result (AF_INET or AF_INET6 or AF_UNSPEC, in nbo)
+   */
+  int32_t result_af GNUNET_PACKED;
+
+  /**
+   * Address family used for the destination address (AF_INET or AF_INET6, in nbo)
+   */
+  int32_t addr_af GNUNET_PACKED;
+
+  /**
+   * Unique ID to match a future response to this request.
+   * Picked by the client.
+   */
+  uint64_t request_id GNUNET_PACKED;
+
+  /* followed by destination address ('struct in_addr' or 'struct in6_addr') */
+};
+
+
+/**
+ * Message send by the VPN client to the VPN service requesting
+ * the setup of a redirection from some IP to a service running
+ * at a particular peer.
+ */
+struct RedirectToServiceRequestMessage
+{
+  /**
+   * Type is #GNUNET_MESSAGE_TYPE_VPN_CLIENT_REDIRECT_TO_SERVICE
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * Always zero.
+   */
+  uint32_t reserved GNUNET_PACKED;
+
+  /**
+   * How long should the redirection be maintained at most?
+   */
+  struct GNUNET_TIME_AbsoluteNBO expiration_time;
+
+  /**
+   * Desired protocol (IPPROTO_UDP or IPPROTO_TCP)
+   */
+  int32_t protocol GNUNET_PACKED;
+
+  /**
+   * Address family desired for the result (AF_INET or AF_INET6 or AF_UNSPEC, in nbo)
+   */
+  int32_t result_af GNUNET_PACKED;
+
+  /**
+   * Target peer offering the service.
+   */
+  struct GNUNET_PeerIdentity target;
+
+  /**
+   * Service descriptor identifying the service.
+   */
+  struct GNUNET_HashCode service_descriptor;
+
+  /**
+   * Unique ID to match a future response to this request.
+   * Picked by the client.
+   */
+  uint64_t request_id GNUNET_PACKED;
+};
+
+
+/**
+ * Response from the VPN service to a VPN client informing about
+ * the IP that was assigned for the requested redirection.
+ */
+struct RedirectToIpResponseMessage
+{
+  /**
+   * Type is #GNUNET_MESSAGE_TYPE_VPN_CLIENT_USE_IP
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * Address family of the allocated address that follows; will match
+   * "result_af" from the request, of be "AF_UNSPEC" on errors.
+   */
+  int32_t result_af GNUNET_PACKED;
+
+  /**
+   * Unique ID to match the response to a request.
+   */
+  uint64_t request_id GNUNET_PACKED;
+
+  /* followed by destination address ('struct in_addr' or 'struct in6_addr') */
+};
+
+GNUNET_NETWORK_STRUCT_END
+
+
+#endif