reactos/dll/win32/lsasrv/session.c

   1 /*
   2  * PROJECT:     Local Security Authority Server DLL
   3  * LICENSE:     GPL - See COPYING in the top level directory
   4  * FILE:        dll/win32/lsasrv/session.c
   5  * PURPOSE:     Logon session management routines
   6  * COPYRIGHT:   Copyright 2013 Eric Kohl
   7  */
   8
   9 /* INCLUDES ****************************************************************/
  10
  11 #include "lsasrv.h"
  12
  13 WINE_DEFAULT_DEBUG_CHANNEL(lsasrv);
  14
  15 typedef struct _LSAP_LOGON_SESSION
  16 {
  17     LIST_ENTRY Entry;
  18     LUID LogonId;
  19 } LSAP_LOGON_SESSION, *PLSAP_LOGON_SESSION;
  20
  21
  22 /* GLOBALS *****************************************************************/
  23
  24 LIST_ENTRY SessionListHead;
  25 ULONG SessionCount;
  26
  27 /* FUNCTIONS ***************************************************************/
  28
  29 VOID
  30 LsapInitLogonSessions(VOID)
  31 {
  32     InitializeListHead(&SessionListHead);
  33     SessionCount = 0;
  34 }
  35
  36
  37 static
  38 PLSAP_LOGON_SESSION
  39 LsapGetLogonSession(IN PLUID LogonId)
  40 {
  41     PLIST_ENTRY SessionEntry;
  42     PLSAP_LOGON_SESSION CurrentSession;
  43
  44     SessionEntry = SessionListHead.Flink;
  45     while (SessionEntry != &SessionListHead)
  46     {
  47         CurrentSession = CONTAINING_RECORD(SessionEntry,
  48                                            LSAP_LOGON_SESSION,
  49                                            Entry);
  50         if (RtlEqualLuid(&CurrentSession->LogonId, LogonId))
  51             return CurrentSession;
  52
  53         SessionEntry = SessionEntry->Flink;
  54     }
  55
  56     return NULL;
  57 }
  58
  59
  60 NTSTATUS
  61 NTAPI
  62 LsapCreateLogonSession(IN PLUID LogonId)
  63 {
  64     PLSAP_LOGON_SESSION Session;
  65
  66     TRACE("()\n");
  67
  68     /* Fail, if a session already exists */
  69     if (LsapGetLogonSession(LogonId) != NULL)
  70         return STATUS_LOGON_SESSION_COLLISION;
  71
  72     /* Allocate a new session entry */
  73     Session = RtlAllocateHeap(RtlGetProcessHeap(),
  74                               HEAP_ZERO_MEMORY,
  75                               sizeof(LSAP_LOGON_SESSION));
  76     if (Session == NULL)
  77         return STATUS_INSUFFICIENT_RESOURCES;
  78
  79     /* Initialize the session entry */
  80     RtlCopyLuid(&Session->LogonId, LogonId);
  81
  82     /* Insert the new session into the session list */
  83     InsertTailList(&SessionListHead, &Session->Entry);
  84     SessionCount++;
  85
  86     return STATUS_SUCCESS;
  87 }
  88
  89
  90 NTSTATUS
  91 NTAPI
  92 LsapDeleteLogonSession(IN PLUID LogonId)
  93 {
  94     PLSAP_LOGON_SESSION Session;
  95
  96     TRACE("()\n");
  97
  98     /* Fail, if the session does not exist */
  99     Session = LsapGetLogonSession(LogonId);
 100     if (Session == NULL)
 101         return STATUS_NO_SUCH_LOGON_SESSION;
 102
 103     /* Remove the session entry from the list */
 104     RemoveEntryList(&Session->Entry);
 105     SessionCount--;
 106
 107     /* Free the session entry */
 108     RtlFreeHeap(RtlGetProcessHeap(), 0, Session);
 109
 110     return STATUS_SUCCESS;
 111 }
 112
 113 /* EOF */