1 files changed, 555 insertions, 0 deletions

diff --git a/src/fs/gnunet-service-fs_new.c b/src/fs/gnunet-service-fs_new.c
new file mode 100644
index 000000000..f0a1513c3
--- /dev/null
+++ b/src/fs/gnunet-service-fs_new.c
@@ -0,0 +1,555 @@
+/*
+     This file is part of GNUnet.
+     (C) 2009, 2010 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.
+*/
+
+/**
+ * @file fs/gnunet-service-fs.c
+ * @brief gnunet anonymity protocol implementation
+ * @author Christian Grothoff
+ *
+ * To use:
+ * - GSF_plan_get_ (!)
+ * - GSF_plan_size_ (?)
+ * - GSF_plan_notify_request_done (!)
+ * - 
+ *
+ *
+ */
+#include "platform.h"
+#include <float.h>
+#include "gnunet_constants.h"
+#include "gnunet_core_service.h"
+#include "gnunet_dht_service.h"
+#include "gnunet_datastore_service.h"
+#include "gnunet_load_lib.h"
+#include "gnunet_peer_lib.h"
+#include "gnunet_protocols.h"
+#include "gnunet_signatures.h"
+#include "gnunet_statistics_service.h"
+#include "gnunet_transport_service.h"
+#include "gnunet_util_lib.h"
+#include "gnunet-service-fs_cp.h"
+#include "gnunet-service-fs_indexing.h"
+#include "gnunet-service-fs_lc.h"
+#include "gnunet-service-fs_pe.h"
+#include "gnunet-service-fs_pr.h"
+#include "gnunet-service-fs_push.h"
+#include "gnunet-service-fs_put.h"
+#include "fs.h"
+
+#define DEBUG_FS GNUNET_YES
+
+/**
+ * Size for the hash map for DHT requests from the FS
+ * service.  Should be about the number of concurrent
+ * DHT requests we plan to make.
+ */
+#define FS_DHT_HT_SIZE 1024
+
+
+/**
+ * How quickly do we age cover traffic?  At the given 
+ * time interval, remaining cover traffic counters are
+ * decremented by 1/16th.
+ */
+#define COVER_AGE_FREQUENCY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
+
+
+/* ****************************** globals ****************************** */
+
+/**
+ * Our connection to the datastore.
+ */
+struct GNUNET_DATASTORE_Handle *GSF_dsh;
+
+/**
+ * Our configuration.
+ */
+const struct GNUNET_CONFIGURATION_Handle *GSF_cfg;
+
+/**
+ * Handle for reporting statistics.
+ */
+struct GNUNET_STATISTICS_Handle *GSF_stats;
+
+/**
+ * Pointer to handle to the core service (points to NULL until we've
+ * connected to it).
+ */
+struct GNUNET_CORE_Handle *GSF_core;
+
+/**
+ * Handle for DHT operations.
+ */
+struct GNUNET_DHT_Handle *GSF_dht;
+
+/**
+ * How long do requests typically stay in the routing table?
+ */
+struct GNUNET_LOAD_Value *GSF_rt_entry_lifetime;
+
+/**
+ * Typical priorities we're seeing from other peers right now.  Since
+ * most priorities will be zero, this value is the weighted average of
+ * non-zero priorities seen "recently".  In order to ensure that new
+ * values do not dramatically change the ratio, values are first
+ * "capped" to a reasonable range (+N of the current value) and then
+ * averaged into the existing value by a ratio of 1:N.  Hence
+ * receiving the largest possible priority can still only raise our
+ * "current_priorities" by at most 1.
+ */
+double GSF_current_priorities;
+
+/**
+ * How many query messages have we received 'recently' that 
+ * have not yet been claimed as cover traffic?
+ */
+unsigned int GSF_cover_query_count;
+
+/**
+ * How many content messages have we received 'recently' that 
+ * have not yet been claimed as cover traffic?
+ */
+unsigned int GSF_cover_content_count;
+
+/**
+ * Our block context.
+ */
+struct GNUNET_BLOCK_Context *GSF_block_ctx;
+
+
+/* ***************************** locals ******************************* */
+
+/**
+ * Configuration for block library.
+ */
+static struct GNUNET_CONFIGURATION_Handle *block_cfg;
+
+/**
+ * ID of our task that we use to age the cover counters.
+ */
+static GNUNET_SCHEDULER_TaskIdentifier cover_age_task;
+
+/**
+ * Pointer to handle to the core service (points to NULL until we've
+ * connected to it).
+ */
+static struct GNUNET_CORE_Handle *core;
+
+/**
+ * Identity of this peer.
+ */
+static struct GNUNET_PeerIdentity my_id;
+
+/**
+ * Task that periodically ages our cover traffic statistics.
+ *
+ * @param cls unused closure
+ * @param tc task context
+ */
+static void
+age_cover_counters (void *cls,
+                    const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+  GSF_cover_content_count = (GSF_cover_content_count * 15) / 16;
+  GSF_cover_query_count = (GSF_cover_query_count * 15) / 16;
+  cover_age_task = GNUNET_SCHEDULER_add_delayed (COVER_AGE_FREQUENCY,
+                                                 &age_cover_counters,
+                                                 NULL);
+}
+
+
+/**
+ * Handle P2P "PUT" message.
+ *
+ * @param cls closure, always NULL
+ * @param other the other peer involved (sender or receiver, NULL
+ *        for loopback messages where we are both sender and receiver)
+ * @param message the actual message
+ * @param atsi performance information
+ * @return GNUNET_OK to keep the connection open,
+ *         GNUNET_SYSERR to close it (signal serious error)
+ */
+static int
+handle_p2p_put (void *cls,
+                const struct GNUNET_PeerIdentity *other,
+                const struct GNUNET_MessageHeader *message,
+                const struct GNUNET_TRANSPORT_ATS_Information *atsi)
+{
+  struct GSF_ConnectedPeer *cp;
+
+  cp = GSF_peer_get_ (other);
+  if (NULL == cp)
+    {
+      GNUNET_break (0);
+      return GNUNET_OK;
+    }
+  return GSF_handle_p2p_content_ (cp, message);
+}
+
+
+/**
+ * Decide with what weight we should forward the given
+ * request to the given peer.
+ *
+ * @param cp target peer
+ * @param pr request
+ */
+static void
+plan (struct GSF_ConnectedPeer *cp,
+      struct GSF_PendingRequest *pr)
+{
+  GNUNET_CONTAINER_HeapCostType weight;
+
+  weight = 0;
+  /* FIXME: calculate weight properly... */
+  GSF_plan_add_ (cp, pr, weight);
+}
+
+
+/**
+ * Handle P2P "GET" request.
+ *
+ * @param cls closure, always NULL
+ * @param other the other peer involved (sender or receiver, NULL
+ *        for loopback messages where we are both sender and receiver)
+ * @param message the actual message
+ * @param atsi performance information
+ * @return GNUNET_OK to keep the connection open,
+ *         GNUNET_SYSERR to close it (signal serious error)
+ */
+static int
+handle_p2p_get (void *cls,
+                const struct GNUNET_PeerIdentity *other,
+                const struct GNUNET_MessageHeader *message,
+                const struct GNUNET_TRANSPORT_ATS_Information *atsi)
+{
+  struct GSF_PendingRequest *pr;
+
+  pr = GSF_handle_p2p_query_ (other, message);
+  if (NULL == pr)
+    return GNUNET_SYSERR;    
+  /* FIXME: local lookup! */
+  /* FIXME: after local lookup, trigger forwarding/routing! */
+  return GNUNET_OK;
+}
+
+
+/**
+ * We have a new request, consider forwarding it to the given
+ * peer.
+ *
+ * @param cls the 'struct GSF_PendingRequest'
+ * @param peer identity of the peer
+ * @param cp handle to the connected peer record
+ * @param perf peer performance data
+ */
+static void
+consider_request_for_forwarding (void *cls,
+                                 const struct GNUNET_PeerIdentity *peer,
+                                 struct GSF_ConnectedPeer *cp,
+                                 const struct GSF_PeerPerformanceData *ppd)
+{
+  struct GSF_PendingRequest *pr = cls;
+
+  plan (cp, pr);
+}
+
+
+/**
+ * Handle START_SEARCH-message (search request from client).
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param message the actual message
+ */
+static void
+handle_start_search (void *cls,
+                     struct GNUNET_SERVER_Client *client,
+                     const struct GNUNET_MessageHeader *message)
+{
+  struct GSF_PendingRequest *pr;
+
+  pr = GSF_local_client_start_search_handler_ (client, message);
+  if (NULL == pr)
+    {
+      /* 'GNUNET_SERVER_receive_done was already called! */
+      return;
+    }
+  /* FIXME: local lookup, then (after DB done!) receive_done: */
+  GNUNET_SERVER_receive_done (client,
+                              GNUNET_OK);
+#if 0
+  /* FIXME: also do DHT lookup */
+  struct GNUNET_DHT_GetHandle *gh;
+  /* store 'gh' with 'pr', cancel it on pr destruction, etc. */
+  gh = GNUNET_DHT_get_start (GSF_dht,
+                             timeout,
+                             type,
+                             key,
+                             des_repl_level,
+                             options,
+                             bf,
+                             bf_mutator,
+                             xquery,
+                             xquery_size,
+                             &GSF_handle_dht_reply_,
+                             pr);
+#endif
+  GSF_iterate_connected_peers_ (&consider_request_for_forwarding,
+                                pr);
+}
+
+
+/**
+ * Task run during shutdown.
+ *
+ * @param cls unused
+ * @param tc unused
+ */
+static void
+shutdown_task (void *cls,
+               const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+  if (NULL != core)
+    {
+      GNUNET_CORE_disconnect (core);
+      core = NULL;
+    }
+  GSF_put_done_ ();
+  GSF_push_done_ ();
+  GSF_pending_request_done_ ();
+  GSF_plan_done ();
+  GSF_connected_peer_done_ ();
+  GNUNET_DATASTORE_disconnect (GSF_dsh, GNUNET_NO);
+  GSF_dsh = NULL;
+  GNUNET_DHT_disconnect (GSF_dht);
+  GSF_dht = NULL;
+  GNUNET_BLOCK_context_destroy (GSF_block_ctx);
+  GSF_block_ctx = NULL;
+  GNUNET_CONFIGURATION_destroy (block_cfg);
+  block_cfg = NULL;
+  GNUNET_STATISTICS_destroy (GSF_stats, GNUNET_NO);
+  if (GNUNET_SCHEDULER_NO_TASK != cover_age_task)
+    {
+      GNUNET_SCHEDULER_cancel (cover_age_task);
+      cover_age_task = GNUNET_SCHEDULER_NO_TASK;
+    }
+}
+
+
+/**
+ * Function called for each pending request whenever a new
+ * peer connects, giving us a chance to decide about submitting
+ * the existing request to the new peer.
+ *
+ * @param cls the 'struct GSF_ConnectedPeer' of the new peer
+ * @param key query for the request
+ * @param pr handle to the pending request
+ * @return GNUNET_YES to continue to iterate
+ */
+static int
+consider_peer_for_forwarding (void *cls,
+                              const GNUNET_HashCode *key,
+                              struct GSF_PendingRequest *pr)
+{
+  struct GSF_ConnectedPeer *cp = cls;
+  
+  plan (cp, pr);
+  return GNUNET_YES;
+}
+
+
+/**
+ * Method called whenever a given peer connects.
+ *
+ * @param cls closure, not used
+ * @param peer peer identity this notification is about
+ * @param atsi performance information
+ */
+static void 
+peer_connect_handler (void *cls,
+                      const struct GNUNET_PeerIdentity *peer,
+                      const struct GNUNET_TRANSPORT_ATS_Information *atsi)
+{
+  struct GSF_ConnectedPeer *cp;
+
+  if (0 == memcmp (&my_id, peer, sizeof (struct GNUNET_PeerIdentity)))
+    return;
+   cp = GSF_peer_connect_handler_ (peer, atsi);
+  if (NULL == cp)
+    return;
+  GSF_iterate_pending_requests_ (&consider_peer_for_forwarding,
+                                 cp);
+}
+
+
+/**
+ * Function called after GNUNET_CORE_connect has succeeded
+ * (or failed for good).  Note that the private key of the
+ * peer is intentionally not exposed here; if you need it,
+ * your process should try to read the private key file
+ * directly (which should work if you are authorized...).
+ *
+ * @param cls closure
+ * @param server handle to the server, NULL if we failed
+ * @param my_identity ID of this peer, NULL if we failed
+ * @param publicKey public key of this peer, NULL if we failed
+ */
+static void
+peer_init_handler (void *cls,
+                   struct GNUNET_CORE_Handle * server,
+                   const struct GNUNET_PeerIdentity *
+                   my_identity,
+                   const struct
+                   GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *
+                   publicKey)
+{
+  my_id = *my_identity;
+}
+
+
+/**
+ * Process fs requests.
+ *
+ * @param server the initialized server
+ * @param c configuration to use
+ */
+static int
+main_init (struct GNUNET_SERVER_Handle *server,
+           const struct GNUNET_CONFIGURATION_Handle *c)
+{
+  static const struct GNUNET_CORE_MessageHandler p2p_handlers[] =
+    {
+      { &handle_p2p_get, 
+        GNUNET_MESSAGE_TYPE_FS_GET, 0 },
+      { &handle_p2p_put, 
+        GNUNET_MESSAGE_TYPE_FS_PUT, 0 },
+      { &GSF_handle_p2p_migration_stop_, 
+        GNUNET_MESSAGE_TYPE_FS_MIGRATION_STOP,
+        sizeof (struct MigrationStopMessage) },
+      { NULL, 0, 0 }
+    };
+  static const struct GNUNET_SERVER_MessageHandler handlers[] = {
+    {&GNUNET_FS_handle_index_start, NULL, 
+     GNUNET_MESSAGE_TYPE_FS_INDEX_START, 0},
+    {&GNUNET_FS_handle_index_list_get, NULL, 
+     GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_GET, sizeof(struct GNUNET_MessageHeader) },
+    {&GNUNET_FS_handle_unindex, NULL, GNUNET_MESSAGE_TYPE_FS_UNINDEX, 
+     sizeof (struct UnindexMessage) },
+    {&handle_start_search, NULL, GNUNET_MESSAGE_TYPE_FS_START_SEARCH, 
+     0 },
+    {NULL, NULL, 0, 0}
+  };
+
+  core = GNUNET_CORE_connect (GSF_cfg,
+                              1, /* larger? */
+                              NULL,
+                              &peer_init_handler,
+                              &peer_connect_handler,
+                              &GSF_peer_disconnect_handler_,
+                              &GSF_peer_status_handler_,
+                              NULL, GNUNET_NO,
+                              NULL, GNUNET_NO,
+                              p2p_handlers);
+  if (NULL == core)
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                  _("Failed to connect to `%s' service.\n"),
+                  "core");
+      return GNUNET_SYSERR;
+    }
+  GNUNET_SERVER_disconnect_notify (server, 
+                                   &GSF_client_disconnect_handler_,
+                                   NULL);
+  GNUNET_SERVER_add_handlers (server, handlers);
+  cover_age_task = GNUNET_SCHEDULER_add_delayed (COVER_AGE_FREQUENCY,
+                                                 &age_cover_counters,
+                                                 NULL);
+  GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
+                                &shutdown_task,
+                                NULL);
+  return GNUNET_OK;
+}
+
+
+/**
+ * Process fs requests.
+ *
+ * @param cls closure
+ * @param server the initialized server
+ * @param cfg configuration to use
+ */
+static void
+run (void *cls,
+     struct GNUNET_SERVER_Handle *server,
+     const struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+  GSF_cfg = cfg;
+  GSF_dsh = GNUNET_DATASTORE_connect (cfg);
+  if (GSF_dsh == NULL)
+    {
+      GNUNET_SCHEDULER_shutdown ();
+      return;
+    }
+  GSF_stats = GNUNET_STATISTICS_create ("fs", cfg);
+  block_cfg = GNUNET_CONFIGURATION_create ();
+  GNUNET_CONFIGURATION_set_value_string (block_cfg,
+                                         "block",
+                                         "PLUGINS",
+                                         "fs");
+  GSF_block_ctx = GNUNET_BLOCK_context_create (block_cfg);
+  GNUNET_assert (NULL != GSF_block_ctx);
+  GSF_dht = GNUNET_DHT_connect (cfg,
+                                FS_DHT_HT_SIZE);
+  GSF_plan_init ();
+  GSF_pending_request_init_ ();
+  GSF_connected_peer_init_ ();
+  GSF_push_init_ ();
+  GSF_put_init_ ();
+  if ( (GNUNET_OK != GNUNET_FS_indexing_init (cfg, GSF_dsh)) ||
+       
+       (GNUNET_OK != main_init (server, cfg)) )
+    {    
+      GNUNET_SCHEDULER_shutdown ();
+      shutdown_task (NULL, NULL);
+      return;   
+    }
+}
+
+
+/**
+ * The main function for the fs service.
+ *
+ * @param argc number of arguments from the command line
+ * @param argv command line arguments
+ * @return 0 ok, 1 on error
+ */
+int
+main (int argc, char *const *argv)
+{
+  return (GNUNET_OK ==
+          GNUNET_SERVICE_run (argc,
+                              argv,
+                              "fs",
+                              GNUNET_SERVICE_OPTION_NONE,
+                              &run, NULL)) ? 0 : 1;
+}
+
+/* end of gnunet-service-fs.c */