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356 lines
9.0 KiB
356 lines
9.0 KiB
/*++
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Copyright (c) 1992-1996 Microsoft Corporation
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Module Name:
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user_lm.c
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Abstract:
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This file contains the routines which actually call Lan Manager and
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retrieve the contents of the user table, including cacheing.
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Environment:
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User Mode - Win32
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Revision History:
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10-May-1996 DonRyan
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Removed banner from Technology Dynamics, Inc.
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--*/
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//--------------------------- WINDOWS DEPENDENCIES --------------------------
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//--------------------------- STANDARD DEPENDENCIES -- #include<xxxxx.h> ----
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#ifdef WIN32
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#include <windows.h>
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#include <lm.h>
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#endif
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#include <string.h>
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#include <search.h>
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#include <stdlib.h>
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#include <time.h>
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//--------------------------- MODULE DEPENDENCIES -- #include"xxxxx.h" ------
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#include "mib.h"
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#include "mibfuncs.h"
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#include "user_tbl.h"
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#include "lmcache.h"
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//--------------------------- SELF-DEPENDENCY -- ONE #include"module.h" -----
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//--------------------------- PUBLIC VARIABLES --(same as in module.h file)--
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//--------------------------- PRIVATE CONSTANTS -----------------------------
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#define SafeBufferFree(x) if(NULL != x) NetApiBufferFree( x )
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#define SafeFree(x) if(NULL != x) SnmpUtilMemFree( x )
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//--------------------------- PRIVATE STRUCTS -------------------------------
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//--------------------------- PRIVATE VARIABLES -----------------------------
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//--------------------------- PRIVATE PROTOTYPES ----------------------------
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//--------------------------- PRIVATE PROCEDURES ----------------------------
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int __cdecl user_entry_cmp(
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IN const USER_ENTRY *A,
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IN const USER_ENTRY *B
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) ;
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BOOL build_user_entry_oids( );
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void FreeUserTable();
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//--------------------------- PUBLIC PROCEDURES -----------------------------
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//
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// MIB_user_lmget
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// Retrieve print queue table information from Lan Manager.
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// If not cached, sort it and then
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// cache it.
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//
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// Notes:
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//
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// Return Codes:
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// SNMPAPI_NOERROR
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// SNMPAPI_ERROR
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//
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// Error Codes:
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// None.
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//
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SNMPAPI MIB_users_lmget(
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)
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{
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DWORD entriesread;
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DWORD totalentries;
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LPBYTE bufptr;
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unsigned lmCode;
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unsigned i;
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USER_INFO_0 *DataTable;
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USER_ENTRY *MIB_UserTableElement ;
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int First_of_this_block;
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LPSTR ansi_string;
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time_t curr_time ;
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SNMPAPI nResult = SNMPAPI_NOERROR;
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DWORD resumehandle=0;
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DWORD dwAllocatedEntries=0;
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time(&curr_time); // get the time
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//
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//
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// If cached, return piece of info.
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//
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//
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if((NULL != cache_table[C_USER_TABLE].bufptr) &&
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(curr_time <
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(cache_table[C_USER_TABLE].acquisition_time
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+ cache_expire[C_USER_TABLE] ) ) )
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{ // it has NOT expired!
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goto Exit ; // the global table is valid
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}
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//
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//
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// Do network call to gather information and put it in a nice array
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//
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//
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//
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// remember to free the existing data
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//
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FreeUserTable();
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First_of_this_block = 0;
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do { // as long as there is more data to process
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lmCode =
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NetUserEnum( NULL, // local server
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0, // level 0, no admin priv.
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FILTER_NORMAL_ACCOUNT,
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&bufptr, // data structure to return
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MAX_PREFERRED_LENGTH,
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&entriesread,
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&totalentries,
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&resumehandle // resume handle
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);
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DataTable = (USER_INFO_0 *) bufptr ;
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if((NERR_Success == lmCode) || (ERROR_MORE_DATA == lmCode))
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{ // valid so process it, otherwise error
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if(0 == MIB_UserTable.Len) { // 1st time, alloc the whole table
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// alloc the table space
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MIB_UserTable.Table = SnmpUtilMemAlloc(totalentries *
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sizeof(USER_ENTRY) );
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// prefix bugs 445183 and 445184
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if (MIB_UserTable.Table == NULL) {
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// free all of the lan man data
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SafeBufferFree( bufptr ) ;
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// Signal error
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nResult = SNMPAPI_ERROR;
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goto Exit;
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}
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dwAllocatedEntries = totalentries;
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}
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MIB_UserTableElement = MIB_UserTable.Table + First_of_this_block ;
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for(i=0; (i<entriesread) && ((i+First_of_this_block) < dwAllocatedEntries); i++) { // once for each entry in the buffer
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// increment the entry number
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MIB_UserTable.Len ++;
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// Stuff the data into each item in the table
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// convert the undocumented unicode to something readable
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if (SnmpUtilUnicodeToUTF8(
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&ansi_string,
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DataTable->usri0_name,
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TRUE )) // auto alloc the space for ansi
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{
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MIB_UserTableElement->svUserName.stream = NULL;
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MIB_UserTableElement->svUserName.length = 0;
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MIB_UserTableElement->svUserName.dynamic = FALSE;
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}
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else
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{
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// client name
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MIB_UserTableElement->svUserName.stream = ansi_string;
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MIB_UserTableElement->svUserName.length = strlen( ansi_string ) ;
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MIB_UserTableElement->svUserName.dynamic = TRUE;
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}
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ansi_string = NULL;
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MIB_UserTableElement ++ ; // and table entry
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DataTable ++ ; // advance pointer to next sess entry in buffer
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} // for each entry in the data table
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// free all of the lan man data
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SafeBufferFree( bufptr ) ;
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// indicate where to start adding on next pass, if any
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First_of_this_block += i ;
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} // if data is valid to process
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else
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{
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// Signal error
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nResult = SNMPAPI_ERROR;
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goto Exit;
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}
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} while (ERROR_MORE_DATA == lmCode) ;
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// iterate over the table populating the Oid field
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if (! build_user_entry_oids())
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{
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SNMPDBG((
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SNMP_LOG_TRACE,
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"SNMP: LMMIB2: build_user_entry_oids failed\n."));
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FreeUserTable();
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cache_table[C_USER_TABLE].bufptr = NULL;
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nResult = SNMPAPI_ERROR;
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goto Exit;
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}
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// Sort the table information using MSC QuickSort routine
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qsort( &MIB_UserTable.Table[0], MIB_UserTable.Len,
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sizeof(USER_ENTRY), user_entry_cmp );
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//
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//
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// Cache table
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//
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//
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if(0 != MIB_UserTable.Len) {
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cache_table[C_USER_TABLE].acquisition_time = curr_time ;
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cache_table[C_USER_TABLE].bufptr = bufptr ;
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}
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//
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//
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// Return piece of information requested
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//
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//
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Exit:
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return nResult;
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} // MIB_user_get
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//
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// MIB_user_cmp
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// Routine for sorting the session table.
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//
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// Notes:
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//
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// Return Codes:
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// SNMPAPI_NOERROR
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// SNMPAPI_ERROR
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//
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// Error Codes:
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// None.
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//
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int __cdecl user_entry_cmp(
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IN const USER_ENTRY *A,
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IN const USER_ENTRY *B
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)
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{
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// Compare the OID's
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return SnmpUtilOidCmp( (AsnObjectIdentifier *)&A->Oid,
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(AsnObjectIdentifier *)&B->Oid );
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} // MIB_user_cmp
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//
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// None.
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//
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BOOL build_user_entry_oids(
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)
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{
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AsnOctetString OSA ;
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USER_ENTRY *UserEntry ;
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unsigned i;
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// start pointer at 1st guy in the table
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UserEntry = MIB_UserTable.Table ;
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// now iterate over the table, creating an oid for each entry
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for( i=0; i<MIB_UserTable.Len ; i++) {
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// for each entry in the session table
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OSA.stream = UserEntry->svUserName.stream ;
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OSA.length = UserEntry->svUserName.length ;
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OSA.dynamic = FALSE;
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// Make the entry's OID from string index
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if (! MakeOidFromStr( &OSA, &UserEntry->Oid ))
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{
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return FALSE;
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}
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UserEntry++; // point to the next guy in the table
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} // for
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return TRUE;
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} // build_user_entry_oids
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void FreeUserTable()
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{
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UINT i;
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USER_ENTRY *MIB_UserTableElement ;
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MIB_UserTableElement = MIB_UserTable.Table ;
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if (MIB_UserTableElement)
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{
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// iterate over the whole table
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for(i=0; i<MIB_UserTable.Len ;i++)
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{
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// free any alloc'ed elements of the structure
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SnmpUtilOidFree(&(MIB_UserTableElement->Oid));
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SnmpUtilMemFree(MIB_UserTableElement->svUserName.stream);
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MIB_UserTableElement ++ ; // increment table entry
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}
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SnmpUtilMemFree(MIB_UserTable.Table) ; // free the base Table
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}
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MIB_UserTable.Table = NULL ; // just for safety
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MIB_UserTable.Len = 0 ; // just for safety
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}
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//-------------------------------- END --------------------------------------
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