ISteamNetworkingSockets004

dll/steam_client.cpp

@@ -494,6 +494,8 @@ void *Steam_Client::GetISteamGenericInterface( HSteamUser hSteamUser, HSteamPipe
             return (void *)(ISteamNetworkingSockets002 *) steam_networking_sockets_temp;
         } else if (strcmp(pchVersion, "SteamNetworkingSockets003") == 0) {
             return (void *)(ISteamNetworkingSockets003 *) steam_networking_sockets_temp;
+        } else if (strcmp(pchVersion, "SteamNetworkingSockets004") == 0) {
+            return (void *)(ISteamNetworkingSockets004 *) steam_networking_sockets_temp;
         } else if (strcmp(pchVersion, "SteamNetworkingSockets006") == 0) {
             return (void *)(ISteamNetworkingSockets006 *) steam_networking_sockets_temp;
         } else if (strcmp(pchVersion, "SteamNetworkingSockets008") == 0) {
@@ -1572,4 +1574,4 @@ void Steam_Client::RunCallbacks(bool runClientCB, bool runGameserverCB)
 void Steam_Client::DestroyAllInterfaces()
 {
     PRINT_DEBUG("Steam_Client::DestroyAllInterfaces\n");
-}
+}

dll/steam_networking_sockets.h

@@ -53,6 +53,7 @@ class Steam_Networking_Sockets :
 public ISteamNetworkingSockets001,
 public ISteamNetworkingSockets002,
 public ISteamNetworkingSockets003,
+public ISteamNetworkingSockets004,
 public ISteamNetworkingSockets006,
 public ISteamNetworkingSockets008,
 public ISteamNetworkingSockets
@@ -255,6 +256,12 @@ HSteamListenSocket CreateListenSocketIP( const SteamNetworkingIPAddr &localAddre
     return k_HSteamListenSocket_Invalid;
 }
 
+HSteamListenSocket CreateListenSocketIP( const SteamNetworkingIPAddr *localAddress )
+{
+    PRINT_DEBUG("Steam_Networking_Sockets::CreateListenSocketIP old1\n");
+    return k_HSteamListenSocket_Invalid;
+}
+
 HSteamListenSocket CreateListenSocketIP( const SteamNetworkingIPAddr &localAddress, int nOptions, const SteamNetworkingConfigValue_t *pOptions )
 {
     PRINT_DEBUG("Steam_Networking_Sockets::CreateListenSocketIP\n");
@@ -285,6 +292,12 @@ HSteamNetConnection ConnectByIPAddress( const SteamNetworkingIPAddr &address )
     return k_HSteamNetConnection_Invalid;
 }
 
+HSteamNetConnection ConnectByIPAddress( const SteamNetworkingIPAddr *address )
+{
+    PRINT_DEBUG("Steam_Networking_Sockets::ConnectByIPAddress old1\n");
+    return k_HSteamNetConnection_Invalid;
+}
+
 HSteamNetConnection ConnectByIPAddress( const SteamNetworkingIPAddr &address, int nOptions, const SteamNetworkingConfigValue_t *pOptions )
 {
     PRINT_DEBUG("Steam_Networking_Sockets::ConnectByIPAddress\n");
@@ -349,6 +362,12 @@ HSteamNetConnection ConnectP2P( const SteamNetworkingIdentity &identityRemote, i
     return socket;
 }
 
+HSteamNetConnection ConnectP2P( const SteamNetworkingIdentity *identityRemote, int nVirtualPort )
+{
+    PRINT_DEBUG("Steam_Networking_Sockets::ConnectP2P old1\n");
+    return ConnectP2P(*identityRemote, nVirtualPort);
+}
+
 HSteamNetConnection ConnectP2P( const SteamNetworkingIdentity &identityRemote, int nVirtualPort, int nOptions, const SteamNetworkingConfigValue_t *pOptions )
 {
     PRINT_DEBUG("Steam_Networking_Sockets::ConnectP2P %i\n", nVirtualPort);
@@ -1187,6 +1206,12 @@ int FindRelayAuthTicketForServer( CSteamID steamID, int nVirtualPort, SteamDatag
 ///
 /// Typically this is useful just to confirm that you have a ticket, before you
 /// call ConnectToHostedDedicatedServer to connect to the server.
+int FindRelayAuthTicketForServer( const SteamNetworkingIdentity *identityGameServer, int nVirtualPort, SteamDatagramRelayAuthTicket *pOutParsedTicket )
+{
+    PRINT_DEBUG("Steam_Networking_Sockets::FindRelayAuthTicketForServer old1\n");
+    return 0;
+}
+
 int FindRelayAuthTicketForServer( const SteamNetworkingIdentity &identityGameServer, int nVirtualPort, SteamDatagramRelayAuthTicket *pOutParsedTicket )
 {
     PRINT_DEBUG("Steam_Networking_Sockets::FindRelayAuthTicketForServer\n");
@@ -1208,6 +1233,12 @@ HSteamNetConnection ConnectToHostedDedicatedServer( const SteamNetworkingIdentit
     return k_HSteamListenSocket_Invalid;
 }
 
+HSteamNetConnection ConnectToHostedDedicatedServer( const SteamNetworkingIdentity *identityTarget, int nVirtualPort )
+{
+    PRINT_DEBUG("Steam_Networking_Sockets::ConnectToHostedDedicatedServer old1\n");
+    return k_HSteamListenSocket_Invalid;
+}
+
 /// Client call to connect to a server hosted in a Valve data center, on the specified virtual
 /// port.  You should have received a ticket for this server, or else this connect call will fail!
 ///

sdk_includes/isteamnetworkingsockets004.h

@@ -0,0 +1,463 @@
+
+#ifndef ISTEAMNETWORKINGSOCKETS004
+#define ISTEAMNETWORKINGSOCKETS004
+
+
+class ISteamNetworkingSockets004
+{
+public:
+
+	/// Creates a "server" socket that listens for clients to connect to by 
+	/// calling ConnectByIPAddress, over ordinary UDP (IPv4 or IPv6)
+	///
+	/// You must select a specific local port to listen on and set it
+	/// the port field of the local address.
+	///
+	/// Usually you wil set the IP portion of the address to zero, (SteamNetworkingIPAddr::Clear()).
+	/// This means that you will not bind to any particular local interface.  In addition,
+	/// if possible the socket will be bound in "dual stack" mode, which means that it can
+	/// accept both IPv4 and IPv6 clients.  If you wish to bind a particular interface, then
+	/// set the local address to the appropriate IPv4 or IPv6 IP.
+	///
+	/// When a client attempts to connect, a SteamNetConnectionStatusChangedCallback_t
+	/// will be posted.  The connection will be in the connecting state.
+	virtual HSteamListenSocket CreateListenSocketIP( const SteamNetworkingIPAddr *localAddress ) = 0;
+
+	/// Creates a connection and begins talking to a "server" over UDP at the
+	/// given IPv4 or IPv6 address.  The remote host must be listening with a
+	/// matching call to CreateListenSocketIP on the specified port.
+	///
+	/// A SteamNetConnectionStatusChangedCallback_t callback will be triggered when we start
+	/// connecting, and then another one on either timeout or successful connection.
+	///
+	/// If the server does not have any identity configured, then their network address
+	/// will be the only identity in use.  Or, the network host may provide a platform-specific
+	/// identity with or without a valid certificate to authenticate that identity.  (These
+	/// details will be contained in the SteamNetConnectionStatusChangedCallback_t.)  It's
+	/// up to your application to decide whether to allow the connection.
+	///
+	/// By default, all connections will get basic encryption sufficient to prevent
+	/// casual eavesdropping.  But note that without certificates (or a shared secret
+	/// distributed through some other out-of-band mechanism), you don't have any
+	/// way of knowing who is actually on the other end, and thus are vulnerable to
+	/// man-in-the-middle attacks.
+	virtual HSteamNetConnection ConnectByIPAddress( const SteamNetworkingIPAddr *address ) = 0;
+
+#ifdef STEAMNETWORKINGSOCKETS_ENABLE_SDR
+	/// Like CreateListenSocketIP, but clients will connect using ConnectP2P
+	///
+	/// nVirtualPort specifies how clients can connect to this socket using
+	/// ConnectP2P.  It's very common for applications to only have one listening socket;
+	/// in that case, use zero.  If you need to open multiple listen sockets and have clients
+	/// be able to connect to one or the other, then nVirtualPort should be a small integer (<1000)
+	/// unique to each listen socket you create.
+	///
+	/// If you use this, you probably want to call ISteamNetworkingUtils::InitRelayNetworkAccess()
+	/// when your app initializes
+	virtual HSteamListenSocket CreateListenSocketP2P( int nVirtualPort ) = 0;
+
+	/// Begin connecting to a server that is identified using a platform-specific identifier.
+	/// This requires some sort of third party rendezvous service, and will depend on the
+	/// platform and what other libraries and services you are integrating with.
+	///
+	/// At the time of this writing, there is only one supported rendezvous service: Steam.
+	/// Set the SteamID (whether "user" or "gameserver") and Steam will determine if the
+	/// client is online and facilitate a relay connection.  Note that all P2P connections on
+	/// Steam are currently relayed.
+	///
+	/// If you use this, you probably want to call ISteamNetworkingUtils::InitRelayNetworkAccess()
+	/// when your app initializes
+	virtual HSteamNetConnection ConnectP2P( const SteamNetworkingIdentity *identityRemote, int nVirtualPort ) = 0;
+#endif
+
+	/// Accept an incoming connection that has been received on a listen socket.
+	///
+	/// When a connection attempt is received (perhaps after a few basic handshake
+	/// packets have been exchanged to prevent trivial spoofing), a connection interface
+	/// object is created in the k_ESteamNetworkingConnectionState_Connecting state
+	/// and a SteamNetConnectionStatusChangedCallback_t is posted.  At this point, your
+	/// application MUST either accept or close the connection.  (It may not ignore it.)
+	/// Accepting the connection will transition it either into the connected state,
+	/// or the finding route state, depending on the connection type.
+	///
+	/// You should take action within a second or two, because accepting the connection is
+	/// what actually sends the reply notifying the client that they are connected.  If you
+	/// delay taking action, from the client's perspective it is the same as the network
+	/// being unresponsive, and the client may timeout the connection attempt.  In other
+	/// words, the client cannot distinguish between a delay caused by network problems
+	/// and a delay caused by the application.
+	///
+	/// This means that if your application goes for more than a few seconds without
+	/// processing callbacks (for example, while loading a map), then there is a chance
+	/// that a client may attempt to connect in that interval and fail due to timeout.
+	///
+	/// If the application does not respond to the connection attempt in a timely manner,
+	/// and we stop receiving communication from the client, the connection attempt will
+	/// be timed out locally, transitioning the connection to the
+	/// k_ESteamNetworkingConnectionState_ProblemDetectedLocally state.  The client may also
+	/// close the connection before it is accepted, and a transition to the
+	/// k_ESteamNetworkingConnectionState_ClosedByPeer is also possible depending the exact
+	/// sequence of events.
+	///
+	/// Returns k_EResultInvalidParam if the handle is invalid.
+	/// Returns k_EResultInvalidState if the connection is not in the appropriate state.
+	/// (Remember that the connection state could change in between the time that the
+	/// notification being posted to the queue and when it is received by the application.)
+	virtual EResult AcceptConnection( HSteamNetConnection hConn ) = 0;
+
+	/// Disconnects from the remote host and invalidates the connection handle.
+	/// Any unread data on the connection is discarded.
+	///
+	/// nReason is an application defined code that will be received on the other
+	/// end and recorded (when possible) in backend analytics.  The value should
+	/// come from a restricted range.  (See ESteamNetConnectionEnd.)  If you don't need
+	/// to communicate any information to the remote host, and do not want analytics to
+	/// be able to distinguish "normal" connection terminations from "exceptional" ones,
+	/// You may pass zero, in which case the generic value of
+	/// k_ESteamNetConnectionEnd_App_Generic will be used.
+	///
+	/// pszDebug is an optional human-readable diagnostic string that will be received
+	/// by the remote host and recorded (when possible) in backend analytics.
+	///
+	/// If you wish to put the socket into a "linger" state, where an attempt is made to
+	/// flush any remaining sent data, use bEnableLinger=true.  Otherwise reliable data
+	/// is not flushed.
+	///
+	/// If the connection has already ended and you are just freeing up the
+	/// connection interface, the reason code, debug string, and linger flag are
+	/// ignored.
+	virtual bool CloseConnection( HSteamNetConnection hPeer, int nReason, const char *pszDebug, bool bEnableLinger ) = 0;
+
+	/// Destroy a listen socket.  All the connections that were accepting on the listen
+	/// socket are closed ungracefully.
+	virtual bool CloseListenSocket( HSteamListenSocket hSocket ) = 0;
+
+	/// Set connection user data.  the data is returned in the following places
+	/// - You can query it using GetConnectionUserData.
+	/// - The SteamNetworkingmessage_t structure.
+	/// - The SteamNetConnectionInfo_t structure.  (Which is a member of SteamNetConnectionStatusChangedCallback_t.)
+	///
+	/// Returns false if the handle is invalid.
+	virtual bool SetConnectionUserData( HSteamNetConnection hPeer, int64 nUserData ) = 0;
+
+	/// Fetch connection user data.  Returns -1 if handle is invalid
+	/// or if you haven't set any userdata on the connection.
+	virtual int64 GetConnectionUserData( HSteamNetConnection hPeer ) = 0;
+
+	/// Set a name for the connection, used mostly for debugging
+	virtual void SetConnectionName( HSteamNetConnection hPeer, const char *pszName ) = 0;
+
+	/// Fetch connection name.  Returns false if handle is invalid
+	virtual bool GetConnectionName( HSteamNetConnection hPeer, char *pszName, int nMaxLen ) = 0;
+
+	/// Send a message to the remote host on the specified connection.
+	///
+	/// nSendFlags determines the delivery guarantees that will be provided,
+	/// when data should be buffered, etc.  E.g. k_nSteamNetworkingSend_Unreliable
+	///
+	/// Note that the semantics we use for messages are not precisely
+	/// the same as the semantics of a standard "stream" socket.
+	/// (SOCK_STREAM)  For an ordinary stream socket, the boundaries
+	/// between chunks are not considered relevant, and the sizes of
+	/// the chunks of data written will not necessarily match up to
+	/// the sizes of the chunks that are returned by the reads on
+	/// the other end.  The remote host might read a partial chunk,
+	/// or chunks might be coalesced.  For the message semantics 
+	/// used here, however, the sizes WILL match.  Each send call 
+	/// will match a successful read call on the remote host 
+	/// one-for-one.  If you are porting existing stream-oriented 
+	/// code to the semantics of reliable messages, your code should 
+	/// work the same, since reliable message semantics are more 
+	/// strict than stream semantics.  The only caveat is related to 
+	/// performance: there is per-message overhead to retain the 
+	/// message sizes, and so if your code sends many small chunks 
+	/// of data, performance will suffer. Any code based on stream 
+	/// sockets that does not write excessively small chunks will 
+	/// work without any changes. 
+	///
+	/// Returns:
+	/// - k_EResultInvalidParam: invalid connection handle, or the individual message is too big.
+	///   (See k_cbMaxSteamNetworkingSocketsMessageSizeSend)
+	/// - k_EResultInvalidState: connection is in an invalid state
+	/// - k_EResultNoConnection: connection has ended
+	/// - k_EResultIgnored: You used k_nSteamNetworkingSend_NoDelay, and the message was dropped because
+	///   we were not ready to send it.
+	/// - k_EResultLimitExceeded: there was already too much data queued to be sent.
+	///   (See k_ESteamNetworkingConfig_SendBufferSize)
+	virtual EResult SendMessageToConnection( HSteamNetConnection hConn, const void *pData, uint32 cbData, int nSendFlags ) = 0;
+
+	/// Flush any messages waiting on the Nagle timer and send them
+	/// at the next transmission opportunity (often that means right now).
+	///
+	/// If Nagle is enabled (it's on by default) then when calling 
+	/// SendMessageToConnection the message will be buffered, up to the Nagle time
+	/// before being sent, to merge small messages into the same packet.
+	/// (See k_ESteamNetworkingConfig_NagleTime)
+	///
+	/// Returns:
+	/// k_EResultInvalidParam: invalid connection handle
+	/// k_EResultInvalidState: connection is in an invalid state
+	/// k_EResultNoConnection: connection has ended
+	/// k_EResultIgnored: We weren't (yet) connected, so this operation has no effect.
+	virtual EResult FlushMessagesOnConnection( HSteamNetConnection hConn ) = 0;
+
+	/// Fetch the next available message(s) from the connection, if any.
+	/// Returns the number of messages returned into your array, up to nMaxMessages.
+	/// If the connection handle is invalid, -1 is returned.
+	///
+	/// The order of the messages returned in the array is relevant.
+	/// Reliable messages will be received in the order they were sent (and with the
+	/// same sizes --- see SendMessageToConnection for on this subtle difference from a stream socket).
+	///
+	/// Unreliable messages may be dropped, or delivered out of order withrespect to
+	/// each other or with respect to reliable messages.  The same unreliable message
+	/// may be received multiple times.
+	///
+	/// If any messages are returned, you MUST call SteamNetworkingMessage_t::Release() on each
+	/// of them free up resources after you are done.  It is safe to keep the object alive for
+	/// a little while (put it into some queue, etc), and you may call Release() from any thread.
+	virtual int ReceiveMessagesOnConnection( HSteamNetConnection hConn, SteamNetworkingMessage_t **ppOutMessages, int nMaxMessages ) = 0; 
+
+	/// Same as ReceiveMessagesOnConnection, but will return the next message available
+	/// on any connection that was accepted through the specified listen socket.  Examine
+	/// SteamNetworkingMessage_t::m_conn to know which client connection.
+	///
+	/// Delivery order of messages among different clients is not defined.  They may
+	/// be returned in an order different from what they were actually received.  (Delivery
+	/// order of messages from the same client is well defined, and thus the order of the
+	/// messages is relevant!)
+	virtual int ReceiveMessagesOnListenSocket( HSteamListenSocket hSocket, SteamNetworkingMessage_t **ppOutMessages, int nMaxMessages ) = 0; 
+
+	/// Returns basic information about the high-level state of the connection.
+	virtual bool GetConnectionInfo( HSteamNetConnection hConn, SteamNetConnectionInfo_t *pInfo ) = 0;
+
+	/// Returns a small set of information about the real-time state of the connection
+	/// Returns false if the connection handle is invalid, or the connection has ended.
+	virtual bool GetQuickConnectionStatus( HSteamNetConnection hConn, SteamNetworkingQuickConnectionStatus *pStats ) = 0;
+
+	/// Returns detailed connection stats in text format.  Useful
+	/// for dumping to a log, etc.
+	///
+	/// Returns:
+	/// -1 failure (bad connection handle)
+	/// 0 OK, your buffer was filled in and '\0'-terminated
+	/// >0 Your buffer was either nullptr, or it was too small and the text got truncated.
+	///    Try again with a buffer of at least N bytes.
+	virtual int GetDetailedConnectionStatus( HSteamNetConnection hConn, char *pszBuf, int cbBuf ) = 0;
+
+	/// Returns local IP and port that a listen socket created using CreateListenSocketIP is bound to.
+	///
+	/// An IPv6 address of ::0 means "any IPv4 or IPv6"
+	/// An IPv6 address of ::ffff:0000:0000 means "any IPv4"
+	virtual bool GetListenSocketAddress( HSteamListenSocket hSocket, SteamNetworkingIPAddr *address ) = 0;
+
+	/// Create a pair of connections that are talking to each other, e.g. a loopback connection.
+	/// This is very useful for testing, or so that your client/server code can work the same
+	/// even when you are running a local "server".
+	///
+	/// The two connections will immediately be placed into the connected state, and no callbacks
+	/// will be posted immediately.  After this, if you close either connection, the other connection
+	/// will receive a callback, exactly as if they were communicating over the network.  You must
+	/// close *both* sides in order to fully clean up the resources!
+	///
+	/// By default, internal buffers are used, completely bypassing the network, the chopping up of
+	/// messages into packets, encryption, copying the payload, etc.  This means that loopback
+	/// packets, by default, will not simulate lag or loss.  Passing true for bUseNetworkLoopback will
+	/// cause the socket pair to send packets through the local network loopback device (127.0.0.1)
+	/// on ephemeral ports.  Fake lag and loss are supported in this case, and CPU time is expended
+	/// to encrypt and decrypt.
+	///
+	/// If you wish to assign a specific identity to either connection, you may pass a particular
+	/// identity.  Otherwise, if you pass nullptr, the respective connection will assume a generic
+	/// "localhost" identity.  If you use real network loopback, this might be translated to the
+	/// actual bound loopback port.  Otherwise, the port will be zero.
+	virtual bool CreateSocketPair( HSteamNetConnection *pOutConnection1, HSteamNetConnection *pOutConnection2, bool bUseNetworkLoopback, const SteamNetworkingIdentity *pIdentity1, const SteamNetworkingIdentity *pIdentity2 ) = 0;
+
+	/// Get the identity assigned to this interface.
+	/// E.g. on Steam, this is the user's SteamID, or for the gameserver interface, the SteamID assigned
+	/// to the gameserver.  Returns false and sets the result to an invalid identity if we don't know
+	/// our identity yet.  (E.g. GameServer has not logged in.  On Steam, the user will know their SteamID
+	/// even if they are not signed into Steam.)
+	virtual bool GetIdentity( SteamNetworkingIdentity *pIdentity ) = 0;
+
+	/// Indicate our desire to be ready participate in authenticated communications.
+	/// If we are currently not ready, then steps will be taken to obtain the necessary
+	/// certificates.   (This includes a certificate for us, as well as any CA certificates
+	/// needed to authenticate peers.)
+	///
+	/// You can call this at program init time if you know that you are going to
+	/// be making authenticated connections, so that we will be ready immediately when
+	/// those connections are attempted.  (Note that essentially all connections require
+	/// authentication, with the exception of ordinary UDP connections with authentication
+	/// disabled using k_ESteamNetworkingConfig_IP_AllowWithoutAuth.)  If you don't call
+	/// this function, we will wait until a feature is utilized that that necessitates
+	/// these resources.
+	///
+	/// You can also call this function to force a retry, if failure has occurred.
+	/// Once we make an attempt and fail, we will not automatically retry.
+	/// In this respect, the behavior of the system after trying and failing is the same
+	/// as before the first attempt: attempting authenticated communication or calling
+	/// this function will call the system to attempt to acquire the necessary resources.
+	///
+	/// You can use GetAuthenticationStatus or listen for SteamNetAuthenticationStatus_t
+	/// to monitor the status.
+	///
+	/// Returns the current value that would be returned from GetAuthenticationStatus.
+	virtual ESteamNetworkingAvailability InitAuthentication() = 0;
+
+	/// Query our readiness to participate in authenticated communications.  A
+	/// SteamNetAuthenticationStatus_t callback is posted any time this status changes,
+	/// but you can use this function to query it at any time.
+	///
+	/// The value of SteamNetAuthenticationStatus_t::m_eAvail is returned.  If you only
+	/// want this high level status, you can pass NULL for pDetails.  If you want further
+	/// details, pass non-NULL to receive them.
+	virtual ESteamNetworkingAvailability GetAuthenticationStatus( SteamNetAuthenticationStatus_t *pDetails ) = 0;
+
+/// Certificate provision by the application.  (On Steam, Steam will handle all this automatically)
+#ifndef STEAMNETWORKINGSOCKETS_STEAM
+
+	/// Get blob that describes a certificate request.  You can send this to your game coordinator.
+	/// Upon entry, *pcbBlob should contain the size of the buffer.  On successful exit, it will
+	/// return the number of bytes that were populated.  You can pass pBlob=NULL to query for the required
+	/// size.  (256 bytes is a very conservative estimate.)
+	///
+	/// Pass this blob to your game coordinator and call SteamDatagram_CreateCert.
+	virtual bool GetCertificateRequest( int *pcbBlob, void *pBlob, SteamNetworkingErrMsg &errMsg ) = 0;
+
+	/// Set the certificate.  The certificate blob should be the output of
+	/// SteamDatagram_CreateCert.
+	virtual bool SetCertificate( const void *pCertificate, int cbCertificate, SteamNetworkingErrMsg &errMsg ) = 0;
+
+#endif
+
+#ifdef STEAMNETWORKINGSOCKETS_ENABLE_SDR
+
+	//
+	// Clients connecting to dedicated servers hosted in a data center,
+	// using central-authority-granted tickets.
+	//
+
+	/// Call this when you receive a ticket from your backend / matchmaking system.  Puts the
+	/// ticket into a persistent cache, and optionally returns the parsed ticket.
+	///
+	/// See stamdatagram_ticketgen.h for more details.
+	virtual bool ReceivedRelayAuthTicket( const void *pvTicket, int cbTicket, SteamDatagramRelayAuthTicket *pOutParsedTicket ) = 0;
+
+	/// Search cache for a ticket to talk to the server on the specified virtual port.
+	/// If found, returns the number of seconds until the ticket expires, and optionally
+	/// the complete cracked ticket.  Returns 0 if we don't have a ticket.
+	///
+	/// Typically this is useful just to confirm that you have a ticket, before you
+	/// call ConnectToHostedDedicatedServer to connect to the server.
+	virtual int FindRelayAuthTicketForServer( const SteamNetworkingIdentity *identityGameServer, int nVirtualPort, SteamDatagramRelayAuthTicket *pOutParsedTicket ) = 0;
+
+	/// Client call to connect to a server hosted in a Valve data center, on the specified virtual
+	/// port.  You must have placed a ticket for this server into the cache, or else this connect attempt will fail!
+	///
+	/// You may wonder why tickets are stored in a cache, instead of simply being passed as an argument
+	/// here.  The reason is to make reconnection to a gameserver robust, even if the client computer loses
+	/// connection to Steam or the central backend, or the app is restarted or crashes, etc.
+	///
+	/// If you use this, you probably want to call ISteamNetworkingUtils::InitRelayNetworkAccess()
+	/// when your app initializes
+	virtual HSteamNetConnection ConnectToHostedDedicatedServer( const SteamNetworkingIdentity *identityTarget, int nVirtualPort ) = 0;
+
+	//
+	// Servers hosted in data centers known to the Valve relay network
+	//
+
+	/// Returns the value of the SDR_LISTEN_PORT environment variable.  This
+	/// is the UDP server your server will be listening on.  This will
+	/// configured automatically for you in production environments.
+	///
+	/// In development, you'll need to set it yourself.  See
+	/// https://partner.steamgames.com/doc/api/ISteamNetworkingSockets
+	/// for more information on how to configure dev environments.
+	virtual uint16 GetHostedDedicatedServerPort() = 0;
+
+	/// Returns 0 if SDR_LISTEN_PORT is not set.  Otherwise, returns the data center the server
+	/// is running in.  This will be k_SteamDatagramPOPID_dev in non-production envirionment.
+	virtual SteamNetworkingPOPID GetHostedDedicatedServerPOPID() = 0;
+
+	/// Return info about the hosted server.  This contains the PoPID of the server,
+	/// and opaque routing information that can be used by the relays to send traffic
+	/// to your server.
+	///
+	/// You will need to send this information to your backend, and put it in tickets,
+	/// so that the relays will know how to forward traffic from
+	/// clients to your server.  See SteamDatagramRelayAuthTicket for more info.
+	///
+	/// Also, note that the routing information is contained in SteamDatagramGameCoordinatorServerLogin,
+	/// so if possible, it's preferred to use GetGameCoordinatorServerLogin to send this info
+	/// to your game coordinator service, and also login securely at the same time.
+	///
+	/// On a successful exit, k_EResultOK is returned
+	///
+	/// Unsuccessful exit:
+	/// - Something other than k_EResultOK is returned.
+	/// - k_EResultInvalidState: We are not configured to listen for SDR (SDR_LISTEN_SOCKET
+	///   is not set.)
+	/// - k_EResultPending: we do not (yet) have the authentication information needed.
+	///   (See GetAuthenticationStatus.)  If you use environment variables to pre-fetch
+	///   the network config, this data should always be available immediately.
+	/// - A non-localized diagnostic debug message will be placed in m_data that describes
+	///   the cause of the failure.
+	///
+	/// NOTE: The returned blob is not encrypted.  Send it to your backend, but don't
+	///       directly share it with clients.
+	virtual EResult GetHostedDedicatedServerAddress( SteamDatagramHostedAddress *pRouting ) = 0;
+
+	/// Create a listen socket on the specified virtual port.  The physical UDP port to use
+	/// will be determined by the SDR_LISTEN_PORT environment variable.  If a UDP port is not
+	/// configured, this call will fail.
+	///
+	/// Note that this call MUST be made through the SteamGameServerNetworkingSockets() interface
+	virtual HSteamListenSocket CreateHostedDedicatedServerListenSocket( int nVirtualPort ) = 0;
+
+	/// Generate an authentication blob that can be used to securely login with
+	/// your backend, using SteamDatagram_ParseHostedServerLogin.  (See
+	/// steamdatagram_gamecoordinator.h)
+	///
+	/// Before calling the function:
+	/// - Populate the app data in pLoginInfo (m_cbAppData and m_appData).  You can leave
+	///   all other fields uninitialized.
+	/// - *pcbSignedBlob contains the size of the buffer at pBlob.  (It should be
+	///   at least k_cbMaxSteamDatagramGameCoordinatorServerLoginSerialized.)
+	///
+	/// On a successful exit:
+	/// - k_EResultOK is returned
+	/// - All of the remaining fields of pLoginInfo will be filled out.
+	/// - *pcbSignedBlob contains the size of the serialized blob that has been
+	///   placed into pBlob.
+	///
+	/// Unsuccessful exit:
+	/// - Something other than k_EResultOK is returned.
+	/// - k_EResultNotLoggedOn: you are not logged in (yet)
+	/// - See GetHostedDedicatedServerAddress for more potential failure return values.
+	/// - A non-localized diagnostic debug message will be placed in pBlob that describes
+	///   the cause of the failure.
+	///
+	/// This works by signing the contents of the SteamDatagramGameCoordinatorServerLogin
+	/// with the cert that is issued to this server.  In dev environments, it's OK if you do
+	/// not have a cert.  (You will need to enable insecure dev login in SteamDatagram_ParseHostedServerLogin.)
+	/// Otherwise, you will need a signed cert.
+	///
+	/// NOTE: The routing blob returned here is not encrypted.  Send it to your backend
+	///       and don't share it directly with clients.
+	virtual EResult GetGameCoordinatorServerLogin( SteamDatagramGameCoordinatorServerLogin *pLoginInfo, int *pcbSignedBlob, void *pBlob ) = 0;
+
+#endif // #ifndef STEAMNETWORKINGSOCKETS_ENABLE_SDR
+
+	// Invoke all callbacks queued for this interface.
+	// On Steam, callbacks are dispatched via the ordinary Steamworks callbacks mechanism.
+	// So if you have code that is also targeting Steam, you should call this at about the
+	// same time you would call SteamAPI_RunCallbacks and SteamGameServer_RunCallbacks.
+#ifdef STEAMNETWORKINGSOCKETS_STANDALONELIB
+	virtual void RunCallbacks( ISteamNetworkingSocketsCallbacks *pCallbacks ) = 0;
+#endif
+protected:
+//	~ISteamNetworkingSockets(); // Silence some warnings
+};
+
+#endif // ISTEAMNETWORKINGSOCKETS004

sdk_includes/steam_api.h

@@ -107,6 +107,7 @@
 #include "isteamnetworkingsockets001.h"
 #include "isteamnetworkingsockets002.h"
 #include "isteamnetworkingsockets003.h"
+#include "isteamnetworkingsockets004.h"
 #include "isteamnetworkingsockets006.h"
 #include "isteamnetworkingsockets008.h"
 #include "isteamremotestorage.h"