Performance optimization for bloom filters.

This reduces a peer's ability to attack network resources by
 using a full bloom filter, but without reducing the usability
 of bloom filters.  It sets a default match everything filter
 for peers and it generalizes a prior optimization to
 cover more cases.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/main.cpp b/src/main.cpp
index 73672eed69..36471d7d98 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3675,6 +3675,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
             LOCK(pfrom->cs_filter);
             delete pfrom->pfilter;
             pfrom->pfilter = new CBloomFilter(filter);
+            filter.UpdateEmptyFull();
         }
         pfrom->fRelayTxes = true;
     }
@@ -3704,7 +3705,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
     {
         LOCK(pfrom->cs_filter);
         delete pfrom->pfilter;
-        pfrom->pfilter = NULL;
+        pfrom->pfilter = new CBloomFilter();
         pfrom->fRelayTxes = true;
     }