Function TestNetworkConditions

tests/test_connection.cpp:366–496

}

static void TestNetworkConditions( int rate, float loss, int lag, float reorderPct, int reorderLag, bool bActLikeGame, ETestConnectionMode eMode )
{
	ISteamNetworkingSockets *pSteamSocketNetworking = SteamNetworkingSockets();

	#ifdef _DEBUG
		rate = std::min( 750000, rate*2/3 );
	#endif

	TEST_Printf( "---------------------------------------------------\n" );
	TEST_Printf( "NETWORK CONDITIONS\n" );
	TEST_Printf( "Rate . . . . . . : %d Bps\n", rate );
	TEST_Printf( "Loss . . . . . . : %g%%\n", loss );
	TEST_Printf( "Ping . . . . . . : %d\n", lag*2 );
	TEST_Printf( "Reorder. . . . . : %g%% @ %dms\n", reorderPct, reorderLag );
	TEST_Printf( "Act like game. . : %d\n", (int)bActLikeGame );
	TEST_Printf( "---------------------------------------------------\n" );

	SteamNetworkingUtils()->SetGlobalConfigValueInt32( k_ESteamNetworkingConfig_SendRateMin, rate );
	SteamNetworkingUtils()->SetGlobalConfigValueInt32( k_ESteamNetworkingConfig_SendRateMax, rate );

	SteamNetworkingUtils()->SetGlobalConfigValueFloat( k_ESteamNetworkingConfig_FakePacketLoss_Send, loss );
	SteamNetworkingUtils()->SetGlobalConfigValueFloat( k_ESteamNetworkingConfig_FakePacketLoss_Recv, 0 );
	SteamNetworkingUtils()->SetGlobalConfigValueInt32( k_ESteamNetworkingConfig_FakePacketLag_Send, lag );
	SteamNetworkingUtils()->SetGlobalConfigValueInt32( k_ESteamNetworkingConfig_FakePacketLag_Recv, 0 );
	SteamNetworkingUtils()->SetGlobalConfigValueFloat( k_ESteamNetworkingConfig_FakePacketReorder_Send, reorderPct );
	SteamNetworkingUtils()->SetGlobalConfigValueInt32( k_ESteamNetworkingConfig_FakePacketReorder_Time, reorderLag );

	SteamNetworkingMicroseconds usecWhenStarted = SteamNetworkingUtils()->GetLocalTimestamp();

	struct Timing { double flQuietSec; double flActiveSec; float flPrintIntervalSec; int nIterations; };
	static const Timing k_timing[] = {
		{ 0.5,  2.0, 1.0f, 1 }, // Cursory
		{ 1.0,  5.0, 2.0f, 2 }, // Normal
		{ 8.0, 25.0, 5.0f, 4 }, // Soak
	};
	const Timing &timing = k_timing[ (int)eMode ];

	SteamNetworkingMicroseconds usecQuietDuration  = SteamNetworkingMicroseconds( timing.flQuietSec  * 1e6 );
	SteamNetworkingMicroseconds usecActiveDuration = SteamNetworkingMicroseconds( timing.flActiveSec * 1e6 );
	float flWaitBetweenPrints = timing.flPrintIntervalSec;
	int nIterations = timing.nIterations;

	bool bQuiet = true;
	SteamNetworkingMicroseconds usecWhenStateEnd = 0;
	SteamNetworkingMicroseconds usecLastPrint = SteamNetworkingUtils()->GetLocalTimestamp();

	while ( true )
	{
		SteamNetworkingMicroseconds now = SteamNetworkingUtils()->GetLocalTimestamp();
		g_usecTestElapsed = now - usecWhenStarted;
		// If flElapsed > 1.0 when in debug, just slamp it
		//if ( Plat_IsInDebugSession() && now - flLastNow > 1.0f )
		//{
		//	flStartTime += now - flLastNow - 1.0f;
		//	flElapsed = now - flStartTime;
		//}
		//usecLastNow = now;