From ce25faf22dabe2ba33ed8bd8bea4d0ed6cd7acf8 Mon Sep 17 00:00:00 2001
From: Christian Fuchs <christian.fuchs@cfuchs.net>
Date: Mon, 18 Nov 2013 17:49:57 +0000
Subject: more work on set intersection

---
 src/set/gnunet-service-set_intersection.c | 106 +++++++++++++++++++++---------
 1 file changed, 75 insertions(+), 31 deletions(-)

(limited to 'src/set')

diff --git a/src/set/gnunet-service-set_intersection.c b/src/set/gnunet-service-set_intersection.c
index 1c79d3c73..879f65809 100644
--- a/src/set/gnunet-service-set_intersection.c
+++ b/src/set/gnunet-service-set_intersection.c
@@ -558,38 +558,51 @@ send_element_count (struct Operation *op)
   GNUNET_MQ_send (op->mq, ev);
 }
 
+/**
+ * Send a result message to the client indicating
+ * that the operation is over.
+ * After the result done message has been sent to the client,
+ * destroy the evaluate operation.
+ *
+ * @param op intersection operation
+ */
+static void
+finish_and_destroy (struct Operation *op)
+{
+  GNUNET_assert (GNUNET_NO == op->state->client_done_sent);
+
+  if (GNUNET_SET_RESULT_FULL == op->spec->result_mode)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sending full result set\n");
+    op->state->full_result_iter =
+        GNUNET_CONTAINER_multihashmap32_iterator_create (op->state->my_elements);
+    send_remaining_elements (op);
+    return;
+  }
+  send_done_and_destroy (op);
+}
 
 /**
  * Handle a done message from a remote peer
  *
- * @param cls the intersection operation
+ * @param cls the union operation
  * @param mh the message
  */
 static void
 handle_p2p_done (void *cls, const struct GNUNET_MessageHeader *mh)
 {
-  struct OperationState *eo = cls;
+  struct Operation *op = cls;
   struct GNUNET_MQ_Envelope *ev;
 
-  if (eo->phase == PHASE_EXPECT_ELEMENTS_AND_REQUESTS)
-  {
-    /* we got all requests, but still have to send our elements as response */
-
-    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got DONE, sending final DONE after elements\n");
-    eo->phase = PHASE_FINISHED;
-    ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_SET_P2P_DONE);
-    GNUNET_MQ_send (eo->mq, ev);
-    return;
-  }
-  if (eo->phase == PHASE_EXPECT_ELEMENTS)
-  {
+  if ((op->state->phase = PHASE_FINISHED) || (op->state->phase = PHASE_MAYBE_FINISHED)){
     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got final DONE\n");
-    eo->phase = PHASE_FINISHED;
-    send_client_done_and_destroy (eo);
+    
+    finish_and_destroy (op);
     return;
   }
-  GNUNET_break (0);
-  fail_intersection_operation (eo);
+  
+  GNUNET_break_op (0);
+  fail_intersection_operation (op);
 }
 
 
@@ -766,27 +779,57 @@ send_done_and_destroy (void *cls)
 }
 
 /**
- * Send a result message to the client indicating
- * that the operation is over.
- * After the result done message has been sent to the client,
- * destroy the evaluate operation.
+ * Send all elements in the full result iterator.
  *
- * @param op union operation
+ * @param cls operation
  */
 static void
-finish_and_destroy (struct Operation *op)
+send_remaining_elements (void *cls)
 {
-  GNUNET_assert (GNUNET_NO == op->state->client_done_sent);
+  struct Operation *op = cls;
+  struct KeyEntry *ke;
+  int res;
 
-  if (GNUNET_SET_RESULT_FULL == op->spec->result_mode)
+  res = GNUNET_CONTAINER_multihashmap32_iterator_next (op->state->full_result_iter, NULL, (const void **) &ke);
+  res = GNUNET_NO;
+  if (GNUNET_NO == res)
   {
-    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sending full result set\n");
-    GNUNET_assert (NULL == op->state->full_result_iter); 
-    op->state->full_result_iter =
-        GNUNET_CONTAINER_multihashmap32_iterator_create (op->state->my_elements);
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sending done and destroy because iterator ran out\n");
+    send_done_and_destroy (op);
     return;
   }
-  send_done_and_destroy (op);
+
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sending elements from key entry\n");
+
+  while (1)
+  {
+    struct GNUNET_MQ_Envelope *ev;
+    struct GNUNET_SET_ResultMessage *rm;
+    struct GNUNET_SET_Element *element;
+    element = &ke->element->element;
+
+    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sending element (size %u) to client (full set)\n", element->size);
+    GNUNET_assert (0 != op->spec->client_request_id);
+    ev = GNUNET_MQ_msg_extra (rm, element->size, GNUNET_MESSAGE_TYPE_SET_RESULT);
+    if (NULL == ev)
+    {
+      GNUNET_MQ_discard (ev);
+      GNUNET_break (0);
+      continue;
+    }
+    rm->result_status = htons (GNUNET_SET_STATUS_OK);
+    rm->request_id = htonl (op->spec->client_request_id);
+    rm->element_type = element->type;
+    memcpy (&rm[1], element->data, element->size);
+    if (ke->next_colliding == NULL)
+    {
+      GNUNET_MQ_notify_sent (ev, send_remaining_elements, op);
+      GNUNET_MQ_send (op->spec->set->client_mq, ev);
+      break;
+    }
+    GNUNET_MQ_send (op->spec->set->client_mq, ev);
+    ke = ke->next_colliding;
+  }
 }
 
 /**
@@ -811,6 +854,7 @@ intersection_peer_disconnect (struct Operation *op)
     _GSS_operation_destroy (op);
     return;
   }
+  // else: the session has already been concluded
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "other peer disconnected (finished)\n");
   if (GNUNET_NO == op->state->client_done_sent)
     finish_and_destroy (op);
-- 
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