log changes of network status

libi2pd/RouterContext.cpp

@@ -303,6 +303,8 @@ namespace i2p
 		SetTesting (false);
 		if (status != m_Status)
 		{
+			LogPrint(eLogInfo, "Router: network status v4 changed ",
+				ROUTER_STATUS_NAMES[m_Status], " -> ", ROUTER_STATUS_NAMES[status]);
 			m_Status = status;
 			switch (m_Status)
 			{
@@ -323,6 +325,8 @@ namespace i2p
 		SetTestingV6 (false);
 		if (status != m_StatusV6)
 		{
+			LogPrint(eLogInfo, "Router: network status v6 changed ",
+				ROUTER_STATUS_NAMES[m_StatusV6], " -> ", ROUTER_STATUS_NAMES[status]);
 			m_StatusV6 = status;
 			switch (m_StatusV6)
 			{

libi2pd/RouterContext.h

@@ -48,6 +48,15 @@ namespace garlic
 		eRouterStatusMesh = 4
 	};
 
+	const char* const ROUTER_STATUS_NAMES[] =
+	{
+		"OK", // 0
+		"Firewalled", // 1
+		"Unknown", // 2
+		"Proxy", // 3
+		"Mesh" // 4
+	};
+
 	enum RouterError
 	{
 		eRouterErrorNone = 0,