1 files changed, 351 insertions, 0 deletions

diff --git a/src/cadet/cadet.h b/src/cadet/cadet.h
new file mode 100644
index 000000000..757f8c501
--- /dev/null
+++ b/src/cadet/cadet.h
@@ -0,0 +1,351 @@
+/*
+     This file is part of GNUnet.
+     (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
+
+     GNUnet is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 3, 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
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @author Bartlomiej Polot
+ * @file cadet/cadet.h
+ */
+
+#ifndef CADET_H_
+#define CADET_H_
+
+#ifdef __cplusplus
+extern "C"
+{
+#if 0                           /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
+#include <stdint.h>
+
+#define CADET_DEBUG              GNUNET_YES
+
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_peer_lib.h"
+#include "gnunet_core_service.h"
+#include "gnunet_protocols.h"
+#include <gnunet_cadet_service.h>
+
+/******************************************************************************/
+/**************************       CONSTANTS      ******************************/
+/******************************************************************************/
+
+#define GNUNET_CADET_LOCAL_CHANNEL_ID_CLI        0x80000000
+#define GNUNET_CADET_LOCAL_CHANNEL_ID_SERV       0xB0000000
+
+#define HIGH_PID                                0xFFFF0000
+#define LOW_PID                                 0x0000FFFF
+
+#define PID_OVERFLOW(pid, max) (pid > HIGH_PID && max < LOW_PID)
+
+/******************************************************************************/
+/**************************        MESSAGES      ******************************/
+/******************************************************************************/
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
+/**
+ * Message for a client to register to the service
+ */
+struct GNUNET_CADET_ClientConnect
+{
+    /**
+     * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_CONNECT
+     *
+     * Size: sizeof(struct GNUNET_CADET_ClientConnect) +
+     *       sizeof(CADET_ApplicationType) * applications +
+     *       sizeof(uint16_t) * types
+     */
+  struct GNUNET_MessageHeader header;
+  /* uint32_t                 list_ports[]           */
+};
+
+
+/**
+ * Type for channel numbering.
+ * - Local channel numbers given by the service (incoming) are >= 0xB0000000
+ * - Local channel numbers given by the client (created) are >= 0x80000000
+ * - Global channel numbers are < 0x80000000
+ */
+typedef uint32_t CADET_ChannelNumber;
+
+
+/**
+ * Message for a client to create and destroy channels.
+ */
+struct GNUNET_CADET_ChannelMessage
+{
+    /**
+     * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_TUNNEL_[CREATE|DESTROY]
+     *
+     * Size: sizeof(struct GNUNET_CADET_ChannelMessage)
+     */
+  struct GNUNET_MessageHeader header;
+
+    /**
+     * ID of a channel controlled by this client.
+     */
+  CADET_ChannelNumber channel_id GNUNET_PACKED;
+
+    /**
+     * Channel's peer
+     */
+  struct GNUNET_PeerIdentity peer;
+
+    /**
+     * Port of the channel.
+     */
+  uint32_t port GNUNET_PACKED;
+
+    /**
+     * Options.
+     */
+  uint32_t opt GNUNET_PACKED;
+};
+
+
+/**
+ * Message for cadet data traffic.
+ */
+struct GNUNET_CADET_LocalData
+{
+    /**
+     * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA
+     */
+  struct GNUNET_MessageHeader header;
+
+    /**
+     * ID of the channel
+     */
+  uint32_t id GNUNET_PACKED;
+
+    /**
+     * Payload follows
+     */
+};
+
+
+/**
+ * Message to allow the client send more data to the service
+ * (always service -> client).
+ */
+struct GNUNET_CADET_LocalAck
+{
+    /**
+     * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK
+     */
+  struct GNUNET_MessageHeader header;
+
+    /**
+     * ID of the channel allowed to send more data.
+     */
+  CADET_ChannelNumber channel_id GNUNET_PACKED;
+
+};
+
+
+/**
+ * Message to inform the client about channels in the service.
+ */
+struct GNUNET_CADET_LocalInfo
+{
+  /**
+     * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO[_TUNNEL,_PEER]
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * ID of the channel allowed to send more data.
+   */
+  CADET_ChannelNumber channel_id GNUNET_PACKED;
+
+  /**
+   * ID of the owner of the channel (can be local peer).
+   */
+//   struct GNUNET_PeerIdentity owner;
+
+  /**
+   * ID of the destination of the channel (can be local peer).
+   */
+  struct GNUNET_PeerIdentity peer;
+};
+
+
+/**
+ * Message to inform the client about one of the peers in the service.
+ */
+struct GNUNET_CADET_LocalInfoPeer
+{
+  /**
+   * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER[S]
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * Number of paths.
+   */
+  uint16_t paths GNUNET_PACKED;
+
+  /**
+   * Do we have a tunnel toward this peer?
+   */
+  int16_t tunnel GNUNET_PACKED;
+
+  /**
+   * ID of the destination of the tunnel (can be local peer).
+   */
+  struct GNUNET_PeerIdentity destination;
+
+  /* If type == PEER (no 'S'): GNUNET_PeerIdentity paths[]
+   * (each path ends in destination) */
+};
+
+/**
+ * Message to inform the client about one of the tunnels in the service.
+ */
+struct GNUNET_CADET_LocalInfoTunnel
+{
+  /**
+   * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL[S]
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * Number of channels.
+   */
+  uint32_t channels GNUNET_PACKED;
+
+  /**
+   * ID of the destination of the tunnel (can be local peer).
+   */
+  struct GNUNET_PeerIdentity destination;
+
+  /**
+   * Number of connections.
+   */
+  uint32_t connections GNUNET_PACKED;
+
+  /**
+   * Encryption state.
+   */
+  uint16_t estate GNUNET_PACKED;
+
+  /**
+   * Connection state.
+   */
+  uint16_t cstate GNUNET_PACKED;
+
+  /* If TUNNEL (no 'S'): GNUNET_PeerIdentity connection_ids[connections] */
+  /* If TUNNEL (no 'S'): uint32_t channel_ids[channels] */
+};
+
+
+GNUNET_NETWORK_STRUCT_END
+
+
+
+/**
+ * @brief Translate a fwd variable into a string representation, for logging.
+ *
+ * @param fwd Is FWD? (#GNUNET_YES or #GNUNET_NO)
+ *
+ * @return String representing FWD or BCK.
+ */
+char *
+GM_f2s (int fwd);
+
+
+/**
+ * Check if one pid is bigger than other, accounting for overflow.
+ *
+ * @param bigger Argument that should be bigger.
+ * @param smaller Argument that should be smaller.
+ *
+ * @return True if bigger (arg1) has a higher value than smaller (arg 2).
+ */
+int
+GM_is_pid_bigger (uint32_t bigger, uint32_t smaller);
+
+
+/**
+ * Get the higher ACK value out of two values, taking in account overflow.
+ *
+ * @param a First ACK value.
+ * @param b Second ACK value.
+ *
+ * @return Highest ACK value from the two.
+ */
+uint32_t
+GM_max_pid (uint32_t a, uint32_t b);
+
+
+/**
+ * Get the lower ACK value out of two values, taking in account overflow.
+ *
+ * @param a First ACK value.
+ * @param b Second ACK value.
+ *
+ * @return Lowest ACK value from the two.
+ */
+uint32_t
+GM_min_pid (uint32_t a, uint32_t b);
+
+
+/**
+ * Convert a 256 bit CadetHash into a 512 HashCode to use in GNUNET_h2s,
+ * multihashmap, and other HashCode-based functions.
+ *
+ * @param id A 256 bit hash to expand.
+ *
+ * @return A HashCode containing the original 256 bit hash right-padded with 0.
+ */
+const struct GNUNET_HashCode *
+GM_h2hc (const struct GNUNET_CADET_Hash *id);
+
+/**
+ * Get a string from a Cadet Hash (256 bits).
+ * WARNING: Not reentrant (based on GNUNET_h2s).
+ */
+const char *
+GM_h2s (const struct GNUNET_CADET_Hash *id);
+
+/**
+ * Convert a message type into a string to help debug
+ * Generated with:
+ * FIND:        "#define ([^ ]+)[ ]*([0-9]+)"
+ * REPLACE:     "    case \2: return "\1"; break;"
+ *
+ * @param m Message type.
+ *
+ * @return Human readable string description.
+ */
+const char *
+GM_m2s (uint16_t m);
+
+#if 0                           /* keep Emacsens' auto-indent happy */
+{
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+#endif