use monotonic clock for uptime

libi2pd/NetDb.cpp

@@ -523,9 +523,10 @@ namespace data
 		auto total = m_RouterInfos.size ();
 		uint64_t expirationTimeout = NETDB_MAX_EXPIRATION_TIMEOUT*1000LL;
 		uint64_t ts = i2p::util::GetMillisecondsSinceEpoch();
+		auto uptime = i2p::context.GetUptime ();	
 		// routers don't expire if less than 90 or uptime is less than 1 hour
-		bool checkForExpiration = total > NETDB_MIN_ROUTERS && ts > (i2p::context.GetStartupTime () + 600)*1000LL; // 10 minutes
-		if (checkForExpiration && ts > (i2p::context.GetStartupTime () + 3600)*1000LL) // 1 hour
+		bool checkForExpiration = total > NETDB_MIN_ROUTERS && uptime > 600; // 10 minutes
+		if (checkForExpiration && uptime > 3600) // 1 hour
 			expirationTimeout = i2p::context.IsFloodfill () ? NETDB_FLOODFILL_EXPIRATION_TIMEOUT*1000LL :
 					NETDB_MIN_EXPIRATION_TIMEOUT*1000LL + (NETDB_MAX_EXPIRATION_TIMEOUT - NETDB_MIN_EXPIRATION_TIMEOUT)*1000LL*NETDB_MIN_ROUTERS/total;
 

libi2pd/RouterContext.cpp

@@ -19,7 +19,7 @@ namespace i2p
 
 	RouterContext::RouterContext ():
 		m_LastUpdateTime (0), m_AcceptsTunnels (true), m_IsFloodfill (false),
-		m_StartupTime (0), m_ShareRatio (100), m_Status (eRouterStatusOK),
+		m_ShareRatio (100), m_Status (eRouterStatusOK),
 		m_Error (eRouterErrorNone), m_NetID (I2PD_NET_ID)
 	{
 	}
@@ -27,7 +27,7 @@ namespace i2p
 	void RouterContext::Init ()
 	{
 		srand (i2p::util::GetMillisecondsSinceEpoch () % 1000);
-		m_StartupTime = i2p::util::GetSecondsSinceEpoch ();
+		m_StartupTime = std::chrono::steady_clock::now();
 		if (!Load ())
 			CreateNewRouter ();
 		m_Decryptor = m_Keys.CreateDecryptor (nullptr);
@@ -716,7 +716,7 @@ namespace i2p
 
 	uint32_t RouterContext::GetUptime () const
 	{
-		return i2p::util::GetSecondsSinceEpoch () - m_StartupTime;
+		return std::chrono::duration_cast<std::chrono::seconds> (std::chrono::steady_clock::now() - m_StartupTime).count ();
 	}
 
 	bool RouterContext::Decrypt (const uint8_t * encrypted, uint8_t * data, BN_CTX * ctx) const

libi2pd/RouterContext.h

@@ -5,6 +5,7 @@
 #include <string>
 #include <memory>
 #include <mutex>
+#include <chrono>
 #include <boost/asio.hpp>
 #include "Identity.h"
 #include "RouterInfo.h"
@@ -64,8 +65,7 @@ namespace i2p
 			const uint8_t * GetNTCP2IV () const { return m_NTCP2Keys ? m_NTCP2Keys->iv : nullptr; };
 			i2p::crypto::X25519Keys& GetStaticKeys (); 
 
-			uint32_t GetUptime () const;
-			uint32_t GetStartupTime () const { return m_StartupTime; };
+			uint32_t GetUptime () const; // in seconds
 			uint64_t GetLastUpdateTime () const { return m_LastUpdateTime; };
 			uint64_t GetBandwidthLimit () const { return m_BandwidthLimit; };
 			uint64_t GetTransitBandwidthLimit () const { return (m_BandwidthLimit*m_ShareRatio)/100LL; };
@@ -137,7 +137,7 @@ namespace i2p
 			std::shared_ptr<i2p::crypto::CryptoKeyDecryptor> m_Decryptor;
 			uint64_t m_LastUpdateTime; // in seconds
 			bool m_AcceptsTunnels, m_IsFloodfill;
-			uint64_t m_StartupTime; // in seconds since epoch
+			std::chrono::time_point<std::chrono::steady_clock> m_StartupTime;
 			uint64_t m_BandwidthLimit; // allowed bandwidth
 			int m_ShareRatio;
 			RouterStatus m_Status;