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windows-server-2003/net/snmp/subagent/lmmib2/sess_lm.c

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/*++
Copyright (c) 1992-1996 Microsoft Corporation
Module Name:
sess_lm.c
Abstract:
This file contains MIB_sess_lmget, which actually call lan manager
for the session table, copies it into structures, and sorts it to
return ready to use by the higher level functions.
Environment:
User Mode - Win32
Revision History:
10-May-1996 DonRyan
Removed banner from Technology Dynamics, Inc.
--*/
//--------------------------- WINDOWS DEPENDENCIES --------------------------
//--------------------------- STANDARD DEPENDENCIES -- #include<xxxxx.h> ----
#ifdef WIN32
#include <windows.h>
#include <lm.h>
#endif
#include <tchar.h>
#include <string.h>
#include <search.h>
#include <stdlib.h>
#include <time.h>
//--------------------------- MODULE DEPENDENCIES -- #include"xxxxx.h" ------
#include "mib.h"
#include "mibfuncs.h"
#include "sess_tbl.h"
#include "lmcache.h"
//--------------------------- SELF-DEPENDENCY -- ONE #include"module.h" -----
//--------------------------- PUBLIC VARIABLES --(same as in module.h file)--
//--------------------------- PRIVATE CONSTANTS -----------------------------
#define SafeBufferFree(x) if(NULL != x) NetApiBufferFree( x )
#define SafeFree(x) if(NULL != x) SnmpUtilMemFree( x )
//--------------------------- PRIVATE STRUCTS -------------------------------
//--------------------------- PRIVATE VARIABLES -----------------------------
//--------------------------- PRIVATE PROTOTYPES ----------------------------
int __cdecl sess_entry_cmp(
IN const SESS_ENTRY *A,
IN const SESS_ENTRY *B
) ;
BOOL build_sess_entry_oids( );
void FreeSessTable();
//--------------------------- PRIVATE PROCEDURES ----------------------------
//--------------------------- PUBLIC PROCEDURES -----------------------------
//
// MIB_sess_lmset
// Perform the necessary actions to SET a field in the Session Table.
//
// Notes:
//
// Return Codes:
//
// Error Codes:
// None.
//
UINT MIB_sess_lmset(
IN AsnObjectIdentifier *Index,
IN UINT Field,
IN AsnAny *Value
)
{
NET_API_STATUS lmCode;
int Found;
UINT Entry;
AsnInteger ErrStat = SNMP_ERRORSTATUS_NOERROR;
char Client[MAX_PATH];
char User[MAX_PATH];
#ifdef UNICODE
LPWSTR UniClient;
LPWSTR UniUser;
#endif
// Must make sure the table is in memory
if ( SNMPAPI_ERROR == MIB_sess_lmget() )
{
ErrStat = SNMP_ERRORSTATUS_GENERR;
goto Exit;
}
// Find a match in the table
if ( MIB_TBL_POS_FOUND != MIB_sess_match(Index, &Entry, FALSE) )
{
ErrStat = SNMP_ERRORSTATUS_NOSUCHNAME;
goto Exit;
}
// Check for action on Table
if ( Value->asnValue.number == SESS_STATE_DELETED )
{
strcpy( Client, "\\\\" );
if (MIB_SessionTable.Table[Entry].svSesClientName.length <= MAX_PATH-3)
{
memcpy( &Client[2], MIB_SessionTable.Table[Entry].svSesClientName.stream,
MIB_SessionTable.Table[Entry].svSesClientName.length );
Client[MIB_SessionTable.Table[Entry].svSesClientName.length+2] = '\0';
}
else
{
ErrStat = SNMP_ERRORSTATUS_GENERR;
goto Exit;
}
if (MIB_SessionTable.Table[Entry].svSesUserName.length <= MAX_PATH-1)
{
memcpy( User, MIB_SessionTable.Table[Entry].svSesUserName.stream,
MIB_SessionTable.Table[Entry].svSesUserName.length );
User[MIB_SessionTable.Table[Entry].svSesUserName.length] = '\0';
}
else
{
ErrStat = SNMP_ERRORSTATUS_GENERR;
goto Exit;
}
#ifdef UNICODE
if (SnmpUtilUTF8ToUnicode(&UniClient,
Client,
TRUE ))
{
ErrStat = SNMP_ERRORSTATUS_RESOURCEUNAVAILABLE;
goto Exit;
}
if (SnmpUtilUTF8ToUnicode(&UniUser,
User,
TRUE ))
{
SnmpUtilMemFree(UniClient);
ErrStat = SNMP_ERRORSTATUS_RESOURCEUNAVAILABLE;
goto Exit;
}
lmCode = NetSessionDel( NULL, UniClient, UniUser );
SnmpUtilMemFree(UniClient);
SnmpUtilMemFree(UniUser);
#else
// Call the LM API to delete it
lmCode = NetSessionDel( NULL, Client, User );
#endif
// Check for successful operation
switch( lmCode )
{
case NERR_Success:
// Make cache be reloaded next time
cache_table[C_SESS_TABLE].bufptr = NULL;
break;
case NERR_ClientNameNotFound:
case NERR_UserNotFound:
ErrStat = SNMP_ERRORSTATUS_NOSUCHNAME;
break;
default:
ErrStat = SNMP_ERRORSTATUS_GENERR;
}
}
Exit:
return ErrStat;
} // MIB_sess_lmset
//
// MIB_sess_lmget
// Retrieve session table information from Lan Manager.
// If not cached, sort it and then
// cache it.
//
// Notes:
//
// Return Codes:
// SNMPAPI_NOERROR
// SNMPAPI_ERROR
//
// Error Codes:
// None.
//
SNMPAPI MIB_sess_lmget(
)
{
DWORD entriesread;
DWORD totalentries;
LPBYTE bufptr=NULL;
unsigned lmCode;
unsigned i;
SESSION_INFO_2 *DataTable;
SESS_ENTRY *MIB_SessionTableElement ;
int First_of_this_block;
time_t curr_time ;
SNMPAPI nResult = SNMPAPI_NOERROR;
LPSTR tempbuff = NULL;
DWORD resumehandle=0;
DWORD dwAllocatedEntries=0;
time(&curr_time); // get the time
//return nResult; // OPENISSUE remember the problem with the error
// every time a free is done from this call to Enum?
//
//
// If cached, return piece of info.
//
//
if((NULL != cache_table[C_SESS_TABLE].bufptr) &&
(curr_time <
(cache_table[C_SESS_TABLE].acquisition_time
+ cache_expire[C_SESS_TABLE] ) ) )
{ // it has NOT expired!
goto Exit ; // the global table is valid
}
//
//
// Do network call to gather information and put it in a nice array
//
//
// free the old table LOOK OUT!!
FreeSessTable();
First_of_this_block = 0;
do { // as long as there is more data to process
lmCode =
NetSessionEnum( NULL, // local server
NULL, // get server stats
NULL,
2, // level
&bufptr, // data structure to return
MAX_PREFERRED_LENGTH,
&entriesread,
&totalentries,
NULL //&resumehandle // resume handle
);
if(NULL == bufptr) return nResult ;
DataTable = (SESSION_INFO_2 *) bufptr ;
if((NERR_Success == lmCode) || (ERROR_MORE_DATA == lmCode))
{ // valid so process it, otherwise error
if(0 == MIB_SessionTable.Len) { // 1st time, alloc the whole table
// alloc the table space
MIB_SessionTable.Table = SnmpUtilMemAlloc(totalentries *
sizeof(SESS_ENTRY) );
if (NULL == MIB_SessionTable.Table)
{
// free all of the lan man data
SafeBufferFree( bufptr );
nResult = SNMPAPI_ERROR;
goto Exit;
}
dwAllocatedEntries = totalentries;
}
MIB_SessionTableElement = MIB_SessionTable.Table + First_of_this_block ;
for(i=0; (i<entriesread) && ((i+First_of_this_block) < dwAllocatedEntries); i++) { // once for each entry in the buffer
// increment the entry number
MIB_SessionTable.Len ++;
// Stuff the data into each item in the table
// client name
MIB_SessionTableElement->svSesClientName.dynamic = TRUE;
#ifdef UNICODE
if (SnmpUtilUnicodeToUTF8(
&MIB_SessionTableElement->svSesClientName.stream,
DataTable->sesi2_cname,
TRUE))
{
MIB_SessionTableElement->svSesClientName.stream = NULL;
MIB_SessionTableElement->svSesClientName.length = 0;
MIB_SessionTableElement->svSesClientName.dynamic = FALSE;
}
else
{
MIB_SessionTableElement->svSesClientName.length =
strlen (MIB_SessionTableElement->svSesClientName.stream);
}
#else
MIB_SessionTableElement->svSesClientName.stream = SnmpUtilMemAlloc (
strlen( DataTable->sesi2_cname )+1 ) ;
MIB_SessionTableElement->svSesClientName.length =
strlen( DataTable->sesi2_cname ) ;
memcpy( MIB_SessionTableElement->svSesClientName.stream,
DataTable->sesi2_cname,
strlen( DataTable->sesi2_cname ) ) ;
#endif
// user name
MIB_SessionTableElement->svSesUserName.dynamic = TRUE;
#ifdef UNICODE
if (SnmpUtilUnicodeToUTF8(
&MIB_SessionTableElement->svSesUserName.stream,
DataTable->sesi2_username,
TRUE))
{
MIB_SessionTableElement->svSesUserName.length = 0;
MIB_SessionTableElement->svSesUserName.stream = NULL;
MIB_SessionTableElement->svSesUserName.dynamic = FALSE;
}
else
{
MIB_SessionTableElement->svSesUserName.length =
strlen(MIB_SessionTableElement->svSesUserName.stream);
}
#else
MIB_SessionTableElement->svSesUserName.stream = SnmpUtilMemAlloc (
strlen( DataTable->sesi2_username ) + 1 ) ;
MIB_SessionTableElement->svSesUserName.length =
strlen( DataTable->sesi2_username ) ;
memcpy( MIB_SessionTableElement->svSesUserName.stream,
DataTable->sesi2_username,
strlen( DataTable->sesi2_username ) ) ;
#endif
// number of connections
MIB_SessionTableElement->svSesNumConns =
// DataTable->sesi2_num_conns ; LM_NOT_THERE
0 ; // so get ready in case somebody implements
// number of opens
MIB_SessionTableElement->svSesNumOpens =
DataTable->sesi2_num_opens ;
// session time
MIB_SessionTableElement->svSesTime =
DataTable->sesi2_time ;
// session idle time
MIB_SessionTableElement->svSesIdleTime =
DataTable->sesi2_idle_time ;
// client type parsing
// first convert from unicode if needed
#ifdef UNICODE
if (SnmpUtilUnicodeToUTF8(
&tempbuff,
DataTable->sesi2_cltype_name,
TRUE))
{
MIB_SessionTableElement->svSesClientType = 0 ;
}
else
{
#else
tempbuff = SnmpUtilMemAlloc( strlen(DataTable->sesi2_cltype_name) + 1 );
memcpy( tempbuff,
DataTable->sesi2_cltype_name,
strlen( DataTable->sesi2_cltype_name ) ) ;
#endif
// let's assume 0 is undefined but better than garbage ...
MIB_SessionTableElement->svSesClientType = 0 ;
if(0==strcmp( "DOWN LEVEL",
tempbuff))
MIB_SessionTableElement->svSesClientType = 1 ;
else if(0==strcmp("DOS LM",
tempbuff))
MIB_SessionTableElement->svSesClientType = 2 ;
else if(0==strcmp("DOS LM 2.0",
tempbuff))
MIB_SessionTableElement->svSesClientType = 3 ;
else if(0==strcmp("OS/2 LM 1.0",
tempbuff))
MIB_SessionTableElement->svSesClientType = 4 ;
else if(0==strcmp("OS/2 LM 2.0",
tempbuff))
MIB_SessionTableElement->svSesClientType = 5 ;
else if(0==strcmp("DOS LM 2.1",
tempbuff))
MIB_SessionTableElement->svSesClientType = 6 ;
else if(0==strcmp("OS/2 LM 2.1",
tempbuff))
MIB_SessionTableElement->svSesClientType = 7 ;
else if(0==strcmp("AFP 1.1",
tempbuff))
MIB_SessionTableElement->svSesClientType = 8 ;
else if(0==strcmp("AFP 2.0",
tempbuff))
MIB_SessionTableElement->svSesClientType = 9 ;
else if(0==strcmp("NT",
tempbuff))
MIB_SessionTableElement->svSesClientType = 10 ;
SnmpUtilMemFree(tempbuff);
tempbuff = NULL;
#ifdef UNICODE
}
#endif
// state is always active, set uses to indicate delete request
MIB_SessionTableElement->svSesState = 1; //always active
DataTable ++ ; // advance pointer to next sess entry in buffer
MIB_SessionTableElement ++ ; // and table entry
} // for each entry in the data table
// free all of the lan man data
SafeBufferFree( bufptr ) ;
// indicate where to start adding on next pass, if any
First_of_this_block += i ;
} // if data is valid to process
else
{
// Signal error
nResult = SNMPAPI_ERROR;
goto Exit;
}
} while (ERROR_MORE_DATA == lmCode) ;
// iterate over the table populating the Oid field
if (! build_sess_entry_oids())
{
SNMPDBG((
SNMP_LOG_TRACE,
"SNMP: LMMIB2: build_sess_entry_oids failed\n."));
FreeSessTable();
cache_table[C_SESS_TABLE].bufptr = NULL;
nResult = SNMPAPI_ERROR;
goto Exit;
}
// Sort the table information using MSC QuickSort routine
qsort( (void *)&MIB_SessionTable.Table[0], (size_t)MIB_SessionTable.Len,
(size_t)sizeof(SESS_ENTRY), sess_entry_cmp );
//
//
// Cache table
//
//
if(0 != MIB_SessionTable.Len) {
cache_table[C_SESS_TABLE].acquisition_time = curr_time ;
cache_table[C_SESS_TABLE].bufptr = bufptr ;
}
//
//
// Return piece of information requested
//
//
Exit:
return nResult;
} // MIB_sess_get
//
// MIB_sess_cmp
// Routine for sorting the session table.
//
// Notes:
//
// Return Codes:
// SNMPAPI_NOERROR
// SNMPAPI_ERROR
//
// Error Codes:
// None.
//
int __cdecl sess_entry_cmp(
IN const SESS_ENTRY *A,
IN const SESS_ENTRY *B
)
{
// Compare the OID's
return SnmpUtilOidCmp( (AsnObjectIdentifier *)&A->Oid,
(AsnObjectIdentifier *)&B->Oid );
} // MIB_sess_cmp
//
// None.
//
BOOL build_sess_entry_oids(
)
{
AsnOctetString OSA ;
AsnObjectIdentifier UserNameOid ;
SESS_ENTRY *SessEntry ;
unsigned i;
// start pointer at 1st guy in the table
SessEntry = MIB_SessionTable.Table ;
// now iterate over the table, creating an oid for each entry
for( i=0; i<MIB_SessionTable.Len ; i++) {
// for each entry in the session table
// copy the client name into the oid buffer first
if (! MakeOidFromStr( &SessEntry->svSesClientName, &SessEntry->Oid ))
{
return FALSE;
}
// copy the user name into a temporary oid buffer
if (! MakeOidFromStr( &SessEntry->svSesUserName, &UserNameOid ))
{
return FALSE;
}
// append the two entries forming the index
if (! SnmpUtilOidAppend( &SessEntry->Oid, &UserNameOid ))
{
SnmpUtilOidFree( &UserNameOid );
return FALSE;
}
// free the temporary buffer
SnmpUtilOidFree( &UserNameOid );
SessEntry++; // point to the next guy in the table
} // for
return TRUE;
} // build_sess_entry_oids
void FreeSessTable()
{
UINT i;
SESS_ENTRY *MIB_SessionTableElement ;
MIB_SessionTableElement = MIB_SessionTable.Table ;
if (MIB_SessionTableElement)
{
// iterate over the whole table
for(i=0; i<MIB_SessionTable.Len ;i++)
{
// free any alloc'ed elements of the structure
SnmpUtilOidFree(&(MIB_SessionTableElement->Oid));
SnmpUtilMemFree(MIB_SessionTableElement->svSesClientName.stream);
SnmpUtilMemFree(MIB_SessionTableElement->svSesUserName.stream);
MIB_SessionTableElement ++ ; // increment table entry
}
SnmpUtilMemFree(MIB_SessionTable.Table) ; // free the base Table
}
MIB_SessionTable.Table = NULL ; // just for safety
MIB_SessionTable.Len = 0 ; // just for safety
}
//-------------------------------- END --------------------------------------