use timestamp to reset rng

libi2pd/NetDb.cpp

@@ -1490,7 +1490,7 @@ namespace data
 			if (eligible.size () > NETDB_MAX_EXPLORATORY_SELECTION_SIZE)
 			{
 				 std::sample (eligible.begin(), eligible.end(), std::back_inserter(m_ExploratorySelection),
-				 	NETDB_MAX_EXPLORATORY_SELECTION_SIZE, std::mt19937(std::random_device()()));
+				 	NETDB_MAX_EXPLORATORY_SELECTION_SIZE, std::mt19937(ts));
 			}	
 			else
 				std::swap (m_ExploratorySelection, eligible);
@@ -1498,7 +1498,7 @@ namespace data
 			if (m_ExploratorySelection.size () > NETDB_MAX_EXPLORATORY_SELECTION_SIZE)
 			{
 				// reduce number of eligible to max selection size
-				std::shuffle (m_ExploratorySelection.begin(), m_ExploratorySelection.end(), std::mt19937(std::random_device()()));
+				std::shuffle (m_ExploratorySelection.begin(), m_ExploratorySelection.end(), std::mt19937(ts));
 				m_ExploratorySelection.resize (NETDB_MAX_EXPLORATORY_SELECTION_SIZE);
 			}	
 #endif			

libi2pd/TunnelPool.cpp

@@ -45,7 +45,8 @@ namespace tunnel
 		m_NumInboundHops (numInboundHops), m_NumOutboundHops (numOutboundHops),
 		m_NumInboundTunnels (numInboundTunnels), m_NumOutboundTunnels (numOutboundTunnels),
 		m_InboundVariance (inboundVariance), m_OutboundVariance (outboundVariance),
-		m_IsActive (true), m_CustomPeerSelector(nullptr), m_Rng(m_Rd())
+		m_IsActive (true), m_CustomPeerSelector(nullptr), 
+		m_Rng(i2p::util::GetMonotonicMicroseconds ()%1000000LL)
 	{
 		if (m_NumInboundTunnels > TUNNEL_POOL_MAX_INBOUND_TUNNELS_QUANTITY)
 			m_NumInboundTunnels = TUNNEL_POOL_MAX_INBOUND_TUNNELS_QUANTITY;

libi2pd/TunnelPool.h

@@ -154,7 +154,6 @@ namespace tunnel
 			int m_MinLatency = 0; // if > 0 this tunnel pool will try building tunnels with minimum latency by ms
 			int m_MaxLatency = 0; // if > 0 this tunnel pool will try building tunnels with maximum latency by ms
 
-			std::random_device m_Rd;
 			std::mt19937 m_Rng;
 			
 		public: