gbe_fork/sdk_includes/isteamnetworkingutils.h

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2019-04-14 00:21:56 +08:00
//====== Copyright Valve Corporation, All rights reserved. ====================
//
// Purpose: misc networking utilities
//
//=============================================================================
#ifndef ISTEAMNETWORKINGUTILS
#define ISTEAMNETWORKINGUTILS
#ifdef STEAM_WIN32
#pragma once
#endif
#include <stdint.h>
#include "steamnetworkingtypes.h"
struct SteamDatagramRelayAuthTicket;
//-----------------------------------------------------------------------------
/// Misc networking utilities for checking the local networking environment
/// and estimating pings.
class ISteamNetworkingUtils
{
public:
#ifdef STEAMNETWORKINGSOCKETS_ENABLE_SDR
//
// Initialization
//
/// If you know that you are going to be using the relay network, call
/// this to initialize the relay network or check if that initialization
/// has completed. If you do not call this, the initialization will
/// happen the first time you use a feature that requires access to the
/// relay network, and that use will be delayed.
///
/// Returns true if initialization has completed successfully.
/// (It will probably return false on the first call.)
///
/// Typically initialization completes in a few seconds.
///
/// Note: dedicated servers hosted with Valve do *not* need to call
/// this, since they do not make routing decisions. However, if the
/// dedicated server will be using P2P functionality, it will act as
/// a "client" and this should be called.
inline bool InitializeRelayNetworkAccess();
//
// "Ping location" functions
//
// We use the ping times to the valve relays deployed worldwide to
// generate a "marker" that describes the location of an Internet host.
// Given two such markers, we can estimate the network latency between
// two hosts, without sending any packets. The estimate is based on the
// optimal route that is found through the Valve network. If you are
// using the Valve network to carry the traffic, then this is precisely
// the ping you want. If you are not, then the ping time will probably
// still be a reasonable estimate.
//
// This is extremely useful to select peers for matchmaking!
//
// The markers can also be converted to a string, so they can be transmitted.
// We have a separate library you can use on your backend to manipulate
// these objects. (See steamdatagram_ticketgen.h)
/// Return location info for the current host. Returns the approximate
/// age of the data, in seconds, or -1 if no data is available.
///
/// It takes a few seconds to initialize access to the relay network. If
/// you call this very soon after calling InitializeRelayNetworkAccess,
/// the data may not be available yet.
///
/// This always return the most up-to-date information we have available
/// right now, even if we are in the middle of re-calculating ping times.
virtual float GetLocalPingLocation( SteamNetworkPingLocation_t &result ) = 0;
/// Estimate the round-trip latency between two arbitrary locations, in
/// milliseconds. This is a conservative estimate, based on routing through
/// the relay network. For most basic relayed connections, this ping time
/// will be pretty accurate, since it will be based on the route likely to
/// be actually used.
///
/// If a direct IP route is used (perhaps via NAT traversal), then the route
/// will be different, and the ping time might be better. Or it might actually
/// be a bit worse! Standard IP routing is frequently suboptimal!
///
/// But even in this case, the estimate obtained using this method is a
/// reasonable upper bound on the ping time. (Also it has the advantage
/// of returning immediately and not sending any packets.)
///
/// In a few cases we might not able to estimate the route. In this case
/// a negative value is returned. k_nSteamNetworkingPing_Failed means
/// the reason was because of some networking difficulty. (Failure to
/// ping, etc) k_nSteamNetworkingPing_Unknown is returned if we cannot
/// currently answer the question for some other reason.
///
/// Do you need to be able to do this from a backend/matchmaking server?
/// You are looking for the "ticketgen" library.
virtual int EstimatePingTimeBetweenTwoLocations( const SteamNetworkPingLocation_t &location1, const SteamNetworkPingLocation_t &location2 ) = 0;
/// Same as EstimatePingTime, but assumes that one location is the local host.
/// This is a bit faster, especially if you need to calculate a bunch of
/// these in a loop to find the fastest one.
///
/// In rare cases this might return a slightly different estimate than combining
/// GetLocalPingLocation with EstimatePingTimeBetweenTwoLocations. That's because
/// this function uses a slightly more complete set of information about what
/// route would be taken.
virtual int EstimatePingTimeFromLocalHost( const SteamNetworkPingLocation_t &remoteLocation ) = 0;
/// Convert a ping location into a text format suitable for sending over the wire.
/// The format is a compact and human readable. However, it is subject to change
/// so please do not parse it yourself. Your buffer must be at least
/// k_cchMaxSteamNetworkingPingLocationString bytes.
virtual void ConvertPingLocationToString( const SteamNetworkPingLocation_t &location, char *pszBuf, int cchBufSize ) = 0;
/// Parse back SteamNetworkPingLocation_t string. Returns false if we couldn't understand
/// the string.
virtual bool ParsePingLocationString( const char *pszString, SteamNetworkPingLocation_t &result ) = 0;
//
// Initialization / ping measurement status
//
/// Check if the ping data of sufficient recency is available, and if
/// it's too old, start refreshing it.
///
/// Please only call this function when you *really* do need to force an
/// immediate refresh of the data. (For example, in response to a specific
/// user input to refresh this information.) Don't call it "just in case",
/// before every connection, etc. That will cause extra traffic to be sent
/// for no benefit. The library will automatically refresh the information
/// as needed.
///
/// Returns true if sufficiently recent data is already available.
///
/// Returns false if sufficiently recent data is not available. In this
/// case, ping measurement is initiated, if it is not already active.
/// (You cannot restart a measurement already in progress.)
virtual bool CheckPingDataUpToDate( float flMaxAgeSeconds ) = 0;
/// Return true if we are taking ping measurements to update our ping
/// location or select optimal routing. Ping measurement typically takes
/// a few seconds, perhaps up to 10 seconds.
virtual bool IsPingMeasurementInProgress() = 0;
//
// List of Valve data centers, and ping times to them. This might
// be useful to you if you are use our hosting, or just need to measure
// latency to a cloud data center where we are running relays.
//
/// Fetch ping time of best available relayed route from this host to
/// the specified data center.
virtual int GetPingToDataCenter( SteamNetworkingPOPID popID, SteamNetworkingPOPID *pViaRelayPoP ) = 0;
/// Get *direct* ping time to the relays at the data center.
virtual int GetDirectPingToPOP( SteamNetworkingPOPID popID ) = 0;
/// Get number of network points of presence in the config
virtual int GetPOPCount() = 0;
/// Get list of all POP IDs. Returns the number of entries that were filled into
/// your list.
virtual int GetPOPList( SteamNetworkingPOPID *list, int nListSz ) = 0;
#endif // #ifdef STEAMNETWORKINGSOCKETS_ENABLE_SDR
//
// Misc
//
/// Fetch current timestamp. This timer has the following properties:
///
/// - Monotonicity is guaranteed.
/// - The initial value will be at least 24*3600*30*1e6, i.e. about
/// 30 days worth of microseconds. In this way, the timestamp value of
/// 0 will always be at least "30 days ago". Also, negative numbers
/// will never be returned.
/// - Wraparound / overflow is not a practical concern.
///
/// If you are running under the debugger and stop the process, the clock
/// might not advance the full wall clock time that has elapsed between
/// calls. If the process is not blocked from normal operation, the
/// timestamp values will track wall clock time, even if you don't call
/// the function frequently.
///
/// The value is only meaningful for this run of the process. Don't compare
/// it to values obtained on another computer, or other runs of the same process.
virtual SteamNetworkingMicroseconds GetLocalTimestamp() = 0;
/// Set a function to receive network-related information that is useful for debugging.
/// This can be very useful during development, but it can also be useful for troubleshooting
/// problems with tech savvy end users. If you have a console or other log that customers
/// can examine, these log messages can often be helpful to troubleshoot network issues.
/// (Especially any warning/error messages.)
///
/// The detail level indicates what message to invoke your callback on. Lower numeric
/// value means more important, and the value you pass is the lowest priority (highest
/// numeric value) you wish to receive callbacks for.
///
/// Except when debugging, you should only use k_ESteamNetworkingSocketsDebugOutputType_Msg
/// or k_ESteamNetworkingSocketsDebugOutputType_Warning. For best performance, do NOT
/// request a high detail level and then filter out messages in your callback. Instead,
/// call function function to adjust the desired level of detail.
///
/// IMPORTANT: This may be called from a service thread, while we own a mutex, etc.
/// Your output function must be threadsafe and fast! Do not make any other
/// Steamworks calls from within the handler.
virtual void SetDebugOutputFunction( ESteamNetworkingSocketsDebugOutputType eDetailLevel, FSteamNetworkingSocketsDebugOutput pfnFunc ) = 0;
//
// Set and get configuration values, see ESteamNetworkingConfigValue for individual descriptions.
//
// Shortcuts for common cases. (Implemented as inline functions below)
bool SetGlobalConfigValueInt32( ESteamNetworkingConfigValue eValue, int32 val );
bool SetGlobalConfigValueFloat( ESteamNetworkingConfigValue eValue, float val );
bool SetGlobalConfigValueString( ESteamNetworkingConfigValue eValue, const char *val );
bool SetConnectionConfigValueInt32( HSteamNetConnection hConn, ESteamNetworkingConfigValue eValue, int32 val );
bool SetConnectionConfigValueFloat( HSteamNetConnection hConn, ESteamNetworkingConfigValue eValue, float val );
bool SetConnectionConfigValueString( HSteamNetConnection hConn, ESteamNetworkingConfigValue eValue, const char *val );
/// Set a configuration value.
/// - eValue: which value is being set
/// - eScope: Onto what type of object are you applying the setting?
/// - scopeArg: Which object you want to change? (Ignored for global scope). E.g. connection handle, listen socket handle, interface pointer, etc.
/// - eDataType: What type of data is in the buffer at pValue? This must match the type of the variable exactly!
/// - pArg: Value to set it to. You can pass NULL to remove a non-global sett at this scope,
/// causing the value for that object to use global defaults. Or at global scope, passing NULL
/// will reset any custom value and restore it to the system default.
/// NOTE: When setting callback functions, do not pass the function pointer directly.
/// Your argument should be a pointer to a function pointer.
virtual bool SetConfigValue( ESteamNetworkingConfigValue eValue, ESteamNetworkingConfigScope eScopeType, intptr_t scopeObj,
ESteamNetworkingConfigDataType eDataType, const void *pArg ) = 0;
/// Get a configuration value.
/// - eValue: which value to fetch
/// - eScopeType: query setting on what type of object
/// - eScopeArg: the object to query the setting for
/// - pOutDataType: If non-NULL, the data type of the value is returned.
/// - pResult: Where to put the result. Pass NULL to query the required buffer size. (k_ESteamNetworkingGetConfigValue_BufferTooSmall will be returned.)
/// - cbResult: IN: the size of your buffer. OUT: the number of bytes filled in or required.
virtual ESteamNetworkingGetConfigValueResult GetConfigValue( ESteamNetworkingConfigValue eValue, ESteamNetworkingConfigScope eScopeType, intptr_t scopeObj,
ESteamNetworkingConfigDataType *pOutDataType, void *pResult, size_t *cbResult ) = 0;
/// Returns info about a configuration value. Returns false if the value does not exist.
/// pOutNextValue can be used to iterate through all of the known configuration values.
/// (Use GetFirstConfigValue() to begin the iteration, will be k_ESteamNetworkingConfig_Invalid on the last value)
/// Any of the output parameters can be NULL if you do not need that information.
virtual bool GetConfigValueInfo( ESteamNetworkingConfigValue eValue, const char **pOutName, ESteamNetworkingConfigDataType *pOutDataType, ESteamNetworkingConfigScope *pOutScope, ESteamNetworkingConfigValue *pOutNextValue ) = 0;
/// Return the lowest numbered configuration value available in the current environment.
virtual ESteamNetworkingConfigValue GetFirstConfigValue() = 0;
// String conversions. You'll usually access these using the respective
// inline methods.
virtual void SteamNetworkingIPAddr_ToString( const SteamNetworkingIPAddr &addr, char *buf, size_t cbBuf, bool bWithPort ) = 0;
virtual bool SteamNetworkingIPAddr_ParseString( SteamNetworkingIPAddr *pAddr, const char *pszStr ) = 0;
virtual void SteamNetworkingIdentity_ToString( const SteamNetworkingIdentity &identity, char *buf, size_t cbBuf ) = 0;
virtual bool SteamNetworkingIdentity_ParseString( SteamNetworkingIdentity *pIdentity, const char *pszStr ) = 0;
protected:
// ~ISteamNetworkingUtils(); // Silence some warnings
};
#define STEAMNETWORKINGUTILS_INTERFACE_VERSION "SteamNetworkingUtils001"
// Global accessor.
#ifdef STEAMNETWORKINGSOCKETS_STANDALONELIB
// Standalone lib
STEAMNETWORKINGSOCKETS_INTERFACE ISteamNetworkingUtils *SteamNetworkingUtils_Lib();
inline ISteamNetworkingUtils *SteamNetworkingUtils() { return SteamNetworkingUtils_Lib(); }
#else
#ifdef NETWORKSOCKETS_DLL
#define SteamNetworkingUtils() SteamNetworkingUtilsX()
#endif
#ifndef STEAM_API_EXPORTS
// Steamworks SDK
inline ISteamNetworkingUtils *SteamNetworkingUtils();
STEAM_DEFINE_INTERFACE_ACCESSOR( ISteamNetworkingUtils *, SteamNetworkingUtils, SteamInternal_FindOrCreateUserInterface( 0, STEAMNETWORKINGUTILS_INTERFACE_VERSION ) );
#else
inline ISteamNetworkingUtils *SteamNetworkingUtils() { return (ISteamNetworkingUtils *)SteamInternal_FindOrCreateUserInterface( 0, STEAMNETWORKINGUTILS_INTERFACE_VERSION );}
#endif
#endif
///////////////////////////////////////////////////////////////////////////////
//
// Internal stuff
#ifdef STEAMNETWORKINGSOCKETS_ENABLE_SDR
inline bool ISteamNetworkingUtils::InitializeRelayNetworkAccess() { return CheckPingDataUpToDate( 1e10f ); }
#endif
inline bool ISteamNetworkingUtils::SetGlobalConfigValueInt32( ESteamNetworkingConfigValue eValue, int32 val ) { return SetConfigValue( eValue, k_ESteamNetworkingConfig_Global, 0, k_ESteamNetworkingConfig_Int32, &val ); }
inline bool ISteamNetworkingUtils::SetGlobalConfigValueFloat( ESteamNetworkingConfigValue eValue, float val ) { return SetConfigValue( eValue, k_ESteamNetworkingConfig_Global, 0, k_ESteamNetworkingConfig_Float, &val ); }
inline bool ISteamNetworkingUtils::SetGlobalConfigValueString( ESteamNetworkingConfigValue eValue, const char *val ) { return SetConfigValue( eValue, k_ESteamNetworkingConfig_Global, 0, k_ESteamNetworkingConfig_String, val ); }
inline bool ISteamNetworkingUtils::SetConnectionConfigValueInt32( HSteamNetConnection hConn, ESteamNetworkingConfigValue eValue, int32 val ) { return SetConfigValue( eValue, k_ESteamNetworkingConfig_Connection, hConn, k_ESteamNetworkingConfig_Int32, &val ); }
inline bool ISteamNetworkingUtils::SetConnectionConfigValueFloat( HSteamNetConnection hConn, ESteamNetworkingConfigValue eValue, float val ) { return SetConfigValue( eValue, k_ESteamNetworkingConfig_Connection, hConn, k_ESteamNetworkingConfig_Float, &val ); }
inline bool ISteamNetworkingUtils::SetConnectionConfigValueString( HSteamNetConnection hConn, ESteamNetworkingConfigValue eValue, const char *val ) { return SetConfigValue( eValue, k_ESteamNetworkingConfig_Connection, hConn, k_ESteamNetworkingConfig_String, val ); }
#if !defined( STEAMNETWORKINGSOCKETS_STATIC_LINK ) && defined( STEAMNETWORKINGSOCKETS_STEAM )
inline void SteamNetworkingIPAddr::ToString( char *buf, size_t cbBuf, bool bWithPort ) const { SteamNetworkingUtils()->SteamNetworkingIPAddr_ToString( *this, buf, cbBuf, bWithPort ); }
inline bool SteamNetworkingIPAddr::ParseString( const char *pszStr ) { return SteamNetworkingUtils()->SteamNetworkingIPAddr_ParseString( this, pszStr ); }
inline void SteamNetworkingIdentity::ToString( char *buf, size_t cbBuf ) const { SteamNetworkingUtils()->SteamNetworkingIdentity_ToString( *this, buf, cbBuf ); }
inline bool SteamNetworkingIdentity::ParseString( const char *pszStr ) { return SteamNetworkingUtils()->SteamNetworkingIdentity_ParseString( this, pszStr ); }
#endif
#ifdef NETWORKSOCKETS_DLL
#undef SteamNetworkingUtils
#endif
#endif // ISTEAMNETWORKINGUTILS