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505 lines
14 KiB
505 lines
14 KiB
/*++
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Copyright (c) 1992-1996 Microsoft Corporation
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Module Name:
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shar_lm.c
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Abstract:
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This file contains MIB_shar_lmget, which actually call lan manager
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for the share table, copies it into structures, and sorts it to
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return ready to use by the higher level functions.
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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 <tchar.h>
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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 "shar_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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int __cdecl shar_entry_cmp(
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IN const SHARE_ENTRY *A,
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IN const SHARE_ENTRY *B
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) ;
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BOOL build_shar_entry_oids( );
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void FreeShareTable();
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//--------------------------- PRIVATE PROCEDURES ----------------------------
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//--------------------------- PUBLIC PROCEDURES -----------------------------
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//
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// MIB_shar_lmget
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// Retrieve sharion 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_shares_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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SHARE_INFO_2 *DataTable;
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SHARE_ENTRY *MIB_ShareTableElement ;
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int First_of_this_block;
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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_SHAR_TABLE].bufptr) &&
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(curr_time <
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(cache_table[C_SHAR_TABLE].acquisition_time
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+ cache_expire[C_SHAR_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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FreeShareTable();
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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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NetShareEnum(NULL, // local server
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2, // level 2,
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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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//
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// Filter out all the Admin shares (name ending with $).
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//
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AdminFilter(2,&entriesread,bufptr);
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DataTable = (SHARE_INFO_2 *) 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_ShareTable.Len) { // 1st time, alloc the whole table
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// alloc the table space
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MIB_ShareTable.Table = SnmpUtilMemAlloc(totalentries *
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sizeof(SHARE_ENTRY) );
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// prefix bugs 445180
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if (MIB_ShareTable.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_ShareTableElement = MIB_ShareTable.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_ShareTable.Len ++;
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// Stuff the data into each item in the table
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// share name
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MIB_ShareTableElement->svShareName.dynamic = TRUE;
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#ifdef UNICODE
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if (SnmpUtilUnicodeToUTF8(
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&MIB_ShareTableElement->svShareName.stream,
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DataTable->shi2_netname,
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TRUE))
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{
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MIB_ShareTableElement->svShareName.length = 0;
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MIB_ShareTableElement->svShareName.stream = NULL;
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MIB_ShareTableElement->svShareName.dynamic = FALSE;
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}
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else
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{
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MIB_ShareTableElement->svShareName.length =
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strlen(MIB_ShareTableElement->svShareName.stream);
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}
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#else
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MIB_ShareTableElement->svShareName.stream = SnmpUtilMemAlloc (
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strlen( DataTable->shi2_netname ) + 1 ) ;
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MIB_ShareTableElement->svShareName.length =
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strlen( DataTable->shi2_netname ) ;
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memcpy( MIB_ShareTableElement->svShareName.stream,
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DataTable->shi2_netname,
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strlen( DataTable->shi2_netname ) ) ;
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#endif
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// Share Path
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MIB_ShareTableElement->svSharePath.dynamic = TRUE;
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#ifdef UNICODE
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if (SnmpUtilUnicodeToUTF8(
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&MIB_ShareTableElement->svSharePath.stream,
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DataTable->shi2_path,
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TRUE))
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{
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MIB_ShareTableElement->svSharePath.length = 0;
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MIB_ShareTableElement->svSharePath.stream = NULL;
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MIB_ShareTableElement->svSharePath.dynamic = FALSE;
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}
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else
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{
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MIB_ShareTableElement->svSharePath.length =
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strlen(MIB_ShareTableElement->svSharePath.stream);
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}
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#else
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MIB_ShareTableElement->svSharePath.stream = SnmpUtilMemAlloc (
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strlen( DataTable->shi2_path ) + 1 ) ;
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MIB_ShareTableElement->svSharePath.length =
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strlen( DataTable->shi2_path ) ;
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memcpy( MIB_ShareTableElement->svSharePath.stream,
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DataTable->shi2_path,
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strlen( DataTable->shi2_path ) ) ;
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#endif
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// Share Comment/Remark
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MIB_ShareTableElement->svShareComment.dynamic = TRUE;
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#ifdef UNICODE
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if (SnmpUtilUnicodeToUTF8(
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&MIB_ShareTableElement->svShareComment.stream,
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DataTable->shi2_remark,
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TRUE))
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{
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MIB_ShareTableElement->svShareComment.length = 0;
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MIB_ShareTableElement->svShareComment.stream = NULL;
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MIB_ShareTableElement->svShareComment.dynamic = FALSE;
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}
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else
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{
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MIB_ShareTableElement->svShareComment.length =
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strlen(MIB_ShareTableElement->svShareComment.stream);
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}
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#else
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MIB_ShareTableElement->svShareComment.stream = SnmpUtilMemAlloc (
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strlen( DataTable->shi2_remark ) + 1 ) ;
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MIB_ShareTableElement->svShareComment.length =
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strlen( DataTable->shi2_remark ) ;
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memcpy( MIB_ShareTableElement->svShareComment.stream,
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DataTable->shi2_remark,
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strlen( DataTable->shi2_remark ) ) ;
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#endif
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DataTable ++ ; // advance pointer to next shar entry in buffer
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MIB_ShareTableElement ++ ; // and table entry
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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_shar_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_prnt_entry_oids failed\n."));
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FreeShareTable();
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cache_table[C_SHAR_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_ShareTable.Table[0], MIB_ShareTable.Len,
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sizeof(SHARE_ENTRY), shar_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_ShareTable.Len) {
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cache_table[C_SHAR_TABLE].acquisition_time = curr_time ;
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cache_table[C_SHAR_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_shar_get
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//
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// MIB_shar_cmp
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// Routine for sorting the sharion 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 shar_entry_cmp(
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IN const SHARE_ENTRY *A,
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IN const SHARE_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_shar_cmp
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//
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// None.
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//
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BOOL build_shar_entry_oids(
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)
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{
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AsnOctetString OSA ;
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SHARE_ENTRY *ShareEntry ;
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unsigned i;
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// start pointer at 1st guy in the table
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ShareEntry = MIB_ShareTable.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_ShareTable.Len ; i++) {
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// for each entry in the sharion table
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OSA.stream = ShareEntry->svShareName.stream ;
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OSA.length = ShareEntry->svShareName.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, &ShareEntry->Oid ))
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{
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return FALSE;
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}
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ShareEntry++; // point to the next guy in the table
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} // for
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return TRUE;
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} // build_shar_entry_oids
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VOID
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AdminFilter(
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DWORD Level,
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LPDWORD pEntriesRead,
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LPBYTE ShareInfo
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)
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/*++
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Routine Description:
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This function filters out the admin shares (ones denoted by a
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a $ as the last character in the name) from a NetShareEnum
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buffer.
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This function only supports info levels 0,1, and 2. If any other
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level is passed in, the function doesn't perform the filter
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operation.
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Arguments:
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Level - Indicates the info level of the enumeration buffer passed in.
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pEntriesRead - Pointer to a location which on entry indicates the
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number of entries to be filtered. On exit it will indicate
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the number of entries after filtering.
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ShareInfo - Pointer to the buffer containing the enumerated structures.
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Return Value:
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none.
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--*/
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{
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LPBYTE pFiltered = ShareInfo;
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DWORD filteredEntries=0;
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DWORD i;
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DWORD entrySize;
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DWORD namePtrOffset;
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LPWSTR pName;
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switch(Level) {
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case 0:
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entrySize = sizeof(SHARE_INFO_0);
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namePtrOffset = (DWORD)((LPBYTE)&(((LPSHARE_INFO_0)ShareInfo)->shi0_netname) -
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ShareInfo);
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break;
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case 1:
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entrySize = sizeof(SHARE_INFO_1);
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namePtrOffset = (DWORD)((LPBYTE)&(((LPSHARE_INFO_1)ShareInfo)->shi1_netname) -
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ShareInfo);
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break;
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case 2:
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entrySize = sizeof(SHARE_INFO_2);
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namePtrOffset = (DWORD)((LPBYTE)&(((LPSHARE_INFO_2)ShareInfo)->shi2_netname) -
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ShareInfo);
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break;
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default:
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return;
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}
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for (i=0; i < *pEntriesRead; i++) {
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pName = *((LPWSTR *)(ShareInfo+namePtrOffset));
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if (pName[wcslen(pName)-1] != L'$') {
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filteredEntries++;
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if (pFiltered != ShareInfo) {
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memcpy(pFiltered, ShareInfo,entrySize);
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}
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pFiltered += entrySize;
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}
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ShareInfo += entrySize;
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}
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*pEntriesRead = filteredEntries;
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}
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void FreeShareTable()
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{
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UINT i;
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SHARE_ENTRY *MIB_ShareTableElement ;
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MIB_ShareTableElement = MIB_ShareTable.Table ;
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if (MIB_ShareTableElement)
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{
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// iterate over the whole table
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for(i=0; i<MIB_ShareTable.Len ;i++)
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{
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// free any alloc'ed elements of the structure
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SnmpUtilOidFree(&(MIB_ShareTableElement->Oid));
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SnmpUtilMemFree(MIB_ShareTableElement->svShareName.stream);
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SnmpUtilMemFree(MIB_ShareTableElement->svSharePath.stream);
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SnmpUtilMemFree(MIB_ShareTableElement->svShareComment.stream);
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MIB_ShareTableElement ++ ; // increment table entry
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}
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SnmpUtilMemFree(MIB_ShareTable.Table) ; // free the base Table
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}
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MIB_ShareTable.Table = NULL ; // just for safety
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MIB_ShareTable.Len = 0 ; // just for safety
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}
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//-------------------------------- END --------------------------------------
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