491 lines
27 KiB
C++
491 lines
27 KiB
C++
//====== Copyright Valve Corporation, All rights reserved. ====================
|
|
//
|
|
// Networking API similar to Berkeley sockets, but for games.
|
|
// - connection-oriented API (like TCP, not UDP)
|
|
// - but unlike TCP, it's message-oriented, not stream-oriented
|
|
// - mix of reliable and unreliable messages
|
|
// - fragmentation and reassembly
|
|
// - Supports connectivity over plain UDPv4
|
|
// - Also supports SDR ("Steam Datagram Relay") connections, which are
|
|
// addressed by SteamID. There is a "P2P" use case and also a "hosted
|
|
// dedicated server" use case.
|
|
//
|
|
//=============================================================================
|
|
|
|
#ifndef ISTEAMNETWORKINGSOCKETS
|
|
#define ISTEAMNETWORKINGSOCKETS
|
|
#ifdef STEAM_WIN32
|
|
#pragma once
|
|
#endif
|
|
|
|
#include "steamnetworkingtypes.h"
|
|
|
|
class ISteamNetworkingSocketsCallbacks;
|
|
|
|
//-----------------------------------------------------------------------------
|
|
/// Lower level networking interface that more closely mirrors the standard
|
|
/// Berkeley sockets model. Sockets are hard! You should probably only use
|
|
/// this interface under the existing circumstances:
|
|
///
|
|
/// - You have an existing socket-based codebase you want to port, or coexist with.
|
|
/// - You want to be able to connect based on IP address, rather than (just) Steam ID.
|
|
/// - You need low-level control of bandwidth utilization, when to drop packets, etc.
|
|
///
|
|
/// Note that neither of the terms "connection" and "socket" will correspond
|
|
/// one-to-one with an underlying UDP socket. An attempt has been made to
|
|
/// keep the semantics as similar to the standard socket model when appropriate,
|
|
/// but some deviations do exist.
|
|
class ISteamNetworkingSockets
|
|
{
|
|
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::InitializeRelayNetworkAccess()
|
|
/// 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::InitializeRelayNetworkAccess()
|
|
/// 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;
|
|
|
|
#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::InitializeRelayNetworkAccess()
|
|
/// when your app initializes
|
|
virtual HSteamNetConnection ConnectToHostedDedicatedServer( const SteamNetworkingIdentity &identityTarget, int nVirtualPort ) = 0;
|
|
|
|
//
|
|
// Servers hosted in Valve data centers
|
|
//
|
|
|
|
/// 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. (You
|
|
/// should set it yourself for testing.)
|
|
virtual uint16 GetHostedDedicatedServerPort() = 0;
|
|
|
|
/// If you are running in a production data center, this will return the data
|
|
/// center code. Returns 0 otherwise.
|
|
virtual SteamNetworkingPOPID GetHostedDedicatedServerPOPID() = 0;
|
|
|
|
/// Return info about the hosted 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.
|
|
///
|
|
/// NOTE ABOUT DEVELOPMENT ENVIRONMENTS:
|
|
/// In production in our data centers, these parameters are configured via environment variables.
|
|
/// In development, the only one you need to set is SDR_LISTEN_PORT, which is the local port you
|
|
/// want to listen on. Furthermore, if you are running your server behind a corporate firewall,
|
|
/// you probably will not be able to put the routing information returned by this function into
|
|
/// tickets. Instead, it should be a public internet address that the relays can use to send
|
|
/// data to your server. So you might just end up hardcoding a public address and setup port
|
|
/// forwarding on your corporate firewall. In that case, the port you put into the ticket
|
|
/// needs to be the public-facing port opened on your firewall, if it is different from the
|
|
/// actual server port.
|
|
///
|
|
/// This function will fail if SteamDatagramServer_Init has not been called.
|
|
///
|
|
/// Returns false if the SDR_LISTEN_PORT environment variable is not set.
|
|
virtual bool 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;
|
|
|
|
#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
|
|
};
|
|
#define STEAMNETWORKINGSOCKETS_INTERFACE_VERSION "SteamNetworkingSockets002"
|
|
|
|
extern "C" {
|
|
|
|
// Global accessor.
|
|
#if defined( STEAMNETWORKINGSOCKETS_PARTNER )
|
|
|
|
// Standalone lib. Use different symbol name, so that we can dynamically switch between steamclient.dll
|
|
// and the standalone lib
|
|
STEAMNETWORKINGSOCKETS_INTERFACE ISteamNetworkingSockets *SteamNetworkingSockets_Lib();
|
|
STEAMNETWORKINGSOCKETS_INTERFACE ISteamNetworkingSockets *SteamGameServerNetworkingSockets_Lib();
|
|
inline ISteamNetworkingSockets *SteamNetworkingSockets() { return SteamNetworkingSockets_Lib(); }
|
|
inline ISteamNetworkingSockets *SteamGameServerNetworkingSockets() { return SteamGameServerNetworkingSockets_Lib(); }
|
|
|
|
#elif defined( STEAMNETWORKINGSOCKETS_OPENSOURCE )
|
|
|
|
// Opensource GameNetworkingSockets
|
|
STEAMNETWORKINGSOCKETS_INTERFACE ISteamNetworkingSockets *SteamNetworkingSockets();
|
|
|
|
#else
|
|
#ifndef NETWORKSOCKETS_DLL
|
|
// Steamworks SDK
|
|
inline ISteamNetworkingSockets *SteamNetworkingSockets();
|
|
STEAM_DEFINE_USER_INTERFACE_ACCESSOR( ISteamNetworkingSockets *, SteamNetworkingSockets, STEAMNETWORKINGSOCKETS_INTERFACE_VERSION );
|
|
inline ISteamNetworkingSockets *SteamGameServerNetworkingSockets();
|
|
STEAM_DEFINE_GAMESERVER_INTERFACE_ACCESSOR( ISteamNetworkingSockets *, SteamGameServerNetworkingSockets, STEAMNETWORKINGSOCKETS_INTERFACE_VERSION );
|
|
#endif
|
|
#endif
|
|
|
|
/// Callback struct used to notify when a connection has changed state
|
|
#if defined( VALVE_CALLBACK_PACK_SMALL )
|
|
#pragma pack( push, 4 )
|
|
#elif defined( VALVE_CALLBACK_PACK_LARGE )
|
|
#pragma pack( push, 8 )
|
|
#else
|
|
#error "Must define VALVE_CALLBACK_PACK_SMALL or VALVE_CALLBACK_PACK_LARGE"
|
|
#endif
|
|
|
|
/// This callback is posted whenever a connection is created, destroyed, or changes state.
|
|
/// The m_info field will contain a complete description of the connection at the time the
|
|
/// change occurred and the callback was posted. In particular, m_eState will have the
|
|
/// new connection state.
|
|
///
|
|
/// You will usually need to listen for this callback to know when:
|
|
/// - A new connection arrives on a listen socket.
|
|
/// m_info.m_hListenSocket will be set, m_eOldState = k_ESteamNetworkingConnectionState_None,
|
|
/// and m_info.m_eState = k_ESteamNetworkingConnectionState_Connecting.
|
|
/// See ISteamNetworkigSockets::AcceptConnection.
|
|
/// - A connection you initiated has been accepted by the remote host.
|
|
/// m_eOldState = k_ESteamNetworkingConnectionState_Connecting, and
|
|
/// m_info.m_eState = k_ESteamNetworkingConnectionState_Connected.
|
|
/// Some connections might transition to k_ESteamNetworkingConnectionState_FindingRoute first.
|
|
/// - A connection has been actively rejected or closed by the remote host.
|
|
/// m_eOldState = k_ESteamNetworkingConnectionState_Connecting or k_ESteamNetworkingConnectionState_Connected,
|
|
/// and m_info.m_eState = k_ESteamNetworkingConnectionState_ClosedByPeer. m_info.m_eEndReason
|
|
/// and m_info.m_szEndDebug will have for more details.
|
|
/// NOTE: upon receiving this callback, you must still destroy the connection using
|
|
/// ISteamNetworkingSockets::CloseConnection to free up local resources. (The details
|
|
/// passed to the function are not used in this case, since the connection is already closed.)
|
|
/// - A problem was detected with the connection, and it has been closed by the local host.
|
|
/// The most common failure is timeout, but other configuration or authentication failures
|
|
/// can cause this. m_eOldState = k_ESteamNetworkingConnectionState_Connecting or
|
|
/// k_ESteamNetworkingConnectionState_Connected, and m_info.m_eState = k_ESteamNetworkingConnectionState_ProblemDetectedLocally.
|
|
/// m_info.m_eEndReason and m_info.m_szEndDebug will have for more details.
|
|
/// NOTE: upon receiving this callback, you must still destroy the connection using
|
|
/// ISteamNetworkingSockets::CloseConnection to free up local resources. (The details
|
|
/// passed to the function are not used in this case, since the connection is already closed.)
|
|
///
|
|
/// Remember that callbacks are posted to a queue, and networking connections can
|
|
/// change at any time. It is possible that the connection has already changed
|
|
/// state by the time you process this callback.
|
|
///
|
|
/// Also note that callbacks will be posted when connections are created and destroyed by your own API calls.
|
|
struct SteamNetConnectionStatusChangedCallback_t
|
|
{
|
|
enum { k_iCallback = k_iSteamNetworkingSocketsCallbacks + 1 };
|
|
|
|
/// Connection handle
|
|
HSteamNetConnection m_hConn;
|
|
|
|
/// Full connection info
|
|
SteamNetConnectionInfo_t m_info;
|
|
|
|
/// Previous state. (Current state is in m_info.m_eState)
|
|
ESteamNetworkingConnectionState m_eOldState;
|
|
};
|
|
#pragma pack( pop )
|
|
|
|
}
|
|
|
|
#endif // ISTEAMNETWORKINGSOCKETS
|