From 7bdfa2135fd5cb638162dd19356e54ec9702c462 Mon Sep 17 00:00:00 2001
From: Christian Fuchs <christian.fuchs@cfuchs.net>
Date: Mon, 9 Dec 2013 15:48:51 +0000
Subject: towards multipart msging for bloomfilters in set intersection

---
 src/set/gnunet-service-set_intersection.c | 44 +++++++++++++++++++++++--------
 src/set/set_protocol.h                    |  5 ++++
 2 files changed, 38 insertions(+), 11 deletions(-)

(limited to 'src/set')

diff --git a/src/set/gnunet-service-set_intersection.c b/src/set/gnunet-service-set_intersection.c
index 39c94592b..45d670c92 100644
--- a/src/set/gnunet-service-set_intersection.c
+++ b/src/set/gnunet-service-set_intersection.c
@@ -76,6 +76,16 @@ struct OperationState
    * BF of the set's element.
    */
   struct GNUNET_CONTAINER_BloomFilter *local_bf;
+  
+  /**
+   * for multipart msgs we have to store the bloomfilter-data until we fully sent it.
+   */
+  char * local_bf_data;
+  
+  /**
+   * for multipart msgs we have to store the bloomfilter-data until we fully sent it.
+   */
+  uint32_t local_bf_data_size;
 
   /**
    * Current state of the operation.
@@ -351,19 +361,31 @@ send_bloomfilter (struct Operation *op)
 
   // send our bloomfilter
   bf_size = GNUNET_CONTAINER_bloomfilter_get_size (op->state->local_bf);
-
-  ev = GNUNET_MQ_msg_extra (msg, bf_size, GNUNET_MESSAGE_TYPE_SET_INTERSECTION_P2P_BF);
-  msg->reserved = 0;
-  msg->sender_element_count = htonl (op->state->my_element_count);
-  msg->bloomfilter_length = htonl (bf_size);
-  msg->sender_mutator = htonl (op->spec->salt);
-  GNUNET_assert (GNUNET_SYSERR !=
+  if ( GNUNET_SERVER_MAX_MESSAGE_SIZE <= bf_size + sizeof(struct BFMessage))
+  {
+    // singlepart
+    ev = GNUNET_MQ_msg_extra (msg, bf_size, GNUNET_MESSAGE_TYPE_SET_INTERSECTION_P2P_BF);
+    
+    GNUNET_CONTAINER_bloomfilter_free (op->state->local_bf);
+    op->state->local_bf = NULL;
+    
+    msg->reserved = 0;
+    msg->sender_element_count = htonl (op->state->my_element_count);
+    msg->bloomfilter_length = htonl (bf_size);
+    msg->bloomfilter_offset = htonl (0);
+    msg->sender_mutator = htonl (op->spec->salt);
+
+    GNUNET_MQ_send (op->mq, ev);
+  }
+  else {
+    op->state->local_bf_data = (char *)GNUNET_malloc(bf_size);
+    GNUNET_assert (GNUNET_SYSERR !=
                  GNUNET_CONTAINER_bloomfilter_get_raw_data (op->state->local_bf,
-                                                            (char *) &msg[1],
+                                                            op->state->local_bf_data,
                                                             bf_size));
-  GNUNET_CONTAINER_bloomfilter_free (op->state->local_bf);
-  op->state->local_bf = NULL;
-  GNUNET_MQ_send (op->mq, ev);
+    op->state->local_bf_data_size = bf_size;
+    send_bloomfilter_multipart (op, 0);
+  }
 }
 
 
diff --git a/src/set/set_protocol.h b/src/set/set_protocol.h
index d37551d2e..310cb202c 100644
--- a/src/set/set_protocol.h
+++ b/src/set/set_protocol.h
@@ -120,6 +120,11 @@ struct BFMessage
    */
   uint32_t bloomfilter_length GNUNET_PACKED;
   
+  /**
+   * offset in the bloolfilter data block, if multipart message
+   */
+  uint32_t bloomfilter_offset GNUNET_PACKED;
+  
   /**
    * rest: the sender's bloomfilter
    */
-- 
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