open62541/src/ua_session.h

#ifndef UA_SESSION_H_
#define UA_SESSION_H_

#include "queue.h"
#include "ua_types.h"
#include "ua_securechannel.h"
#include "ua_server.h"

#define MAXCONTINUATIONPOINTS 5

#ifdef ENABLE_SUBSCRIPTIONS
#include "server/ua_subscription_manager.h"
#endif

/**
 *  @ingroup communication
 *
 * @{
 */

struct ContinuationPointEntry {
    LIST_ENTRY(ContinuationPointEntry) pointers;
    UA_ByteString        identifier;
    UA_BrowseDescription browseDescription;
    UA_Int32            continuationIndex;
    UA_UInt32            maxReferences;
};

struct UA_Session {
    UA_ApplicationDescription clientDescription;
    UA_Boolean        activated;
    UA_String         sessionName;
    UA_NodeId         authenticationToken;
    UA_NodeId         sessionId;
    UA_UInt32         maxRequestMessageSize;
    UA_UInt32         maxResponseMessageSize;
    UA_Int64          timeout; // [ms]
    UA_DateTime       validTill;
    #ifdef ENABLE_SUBSCRIPTIONS
        UA_SubscriptionManager subscriptionManager;
    #endif
    UA_SecureChannel *channel;
    UA_UInt16 availableContinuationPoints;
    LIST_HEAD(ContinuationPointList, ContinuationPointEntry) continuationPoints;
};

extern UA_Session anonymousSession; ///< If anonymous access is allowed, this session is used internally (Session ID: 0)
extern UA_Session adminSession; ///< Local access to the services (for startup and maintenance) uses this Session with all possible access rights (Session ID: 1)

void UA_Session_init(UA_Session *session);
void UA_Session_deleteMembersCleanup(UA_Session *session, UA_Server *server);

/** If any activity on a session happens, the timeout is extended */
void UA_Session_updateLifetime(UA_Session *session);

/** @} */

#endif /* UA_SESSION_H_ */