send floodfill in DatabaseSerachReply

I2NPProtocol.cpp

@@ -160,14 +160,24 @@ namespace i2p
 		return m; 
 	}	
 
-	I2NPMessage * CreateDatabaseSearchReply (const i2p::data::IdentHash& ident)
+	I2NPMessage * CreateDatabaseSearchReply (const i2p::data::IdentHash& ident, 
+		const i2p::data::RouterInfo * floodfill)
 	{
 		I2NPMessage * m = NewI2NPMessage ();
 		uint8_t * buf = m->GetPayload ();
+		size_t len = 0;
 		memcpy (buf, ident, 32);
-		buf[32] = 0; // TODO:
-		memcpy (buf + 33, i2p::context.GetRouterInfo ().GetIdentHash (), 32);
-		m->len += 65;
+		len += 32;
+		buf[len] = floodfill ? 1 : 0; // 1 router for now
+		len++;
+		if (floodfill)
+		{
+			memcpy (buf + len, floodfill->GetIdentHash (), 32);
+			len += 32;
+		}	
+		memcpy (buf + len, i2p::context.GetRouterInfo ().GetIdentHash (), 32);
+		len += 32;	
+		m->len += len;
 		FillI2NPMessageHeader (m, eI2NPDatabaseSearchReply);
 		return m; 
 	}	

I2NPProtocol.h

@@ -154,7 +154,7 @@ namespace tunnel
 	I2NPMessage * CreateDatabaseLookupMsg (const uint8_t * key, const uint8_t * from, 
 		uint32_t replyTunnelID, bool exploratory = false, 
 	    std::set<i2p::data::IdentHash> * excludedPeers = nullptr, bool encryption = false);
-	I2NPMessage * CreateDatabaseSearchReply (const i2p::data::IdentHash& ident);
+	I2NPMessage * CreateDatabaseSearchReply (const i2p::data::IdentHash& ident, const i2p::data::RouterInfo * floodfill);
 	
 	I2NPMessage * CreateDatabaseStoreMsg (const i2p::data::RouterInfo * router = nullptr);
 	

NetDb.cpp

@@ -582,7 +582,10 @@ namespace data
 			replyMsg = CreateDatabaseStoreMsg (router);
 		}
 		else
-			replyMsg = CreateDatabaseSearchReply (buf);
+		{
+			std::set<IdentHash> excluded; // empty for now
+			replyMsg = CreateDatabaseSearchReply (buf, GetClosestFloodfill (buf, excluded));
+		}	
 		if (replyMsg)
 		{	
 			if (replyTunnelID)