538 lines
14 KiB
C
538 lines
14 KiB
C
/*++
|
|
|
|
Copyright (c) 1992-1996 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
sess_tbl.c
|
|
|
|
Abstract:
|
|
|
|
All routines to support opertions on the LM MIB session table.
|
|
|
|
Environment:
|
|
|
|
User Mode - Win32
|
|
|
|
Revision History:
|
|
|
|
10-May-1996 DonRyan
|
|
Removed banner from Technology Dynamics, Inc.
|
|
|
|
--*/
|
|
|
|
//--------------------------- WINDOWS DEPENDENCIES --------------------------
|
|
|
|
//--------------------------- STANDARD DEPENDENCIES -- #include<xxxxx.h> ----
|
|
|
|
#include <stdio.h>
|
|
#include <memory.h>
|
|
|
|
//--------------------------- MODULE DEPENDENCIES -- #include"xxxxx.h" ------
|
|
|
|
#include <snmp.h>
|
|
#include <snmputil.h>
|
|
|
|
#include "mibfuncs.h"
|
|
|
|
//--------------------------- SELF-DEPENDENCY -- ONE #include"module.h" -----
|
|
|
|
#include "sess_tbl.h"
|
|
|
|
//--------------------------- PUBLIC VARIABLES --(same as in module.h file)--
|
|
|
|
// Prefix to the Session table
|
|
static UINT sessSubids[] = { 2, 20, 1 };
|
|
static AsnObjectIdentifier MIB_SessPrefix = { 3, sessSubids };
|
|
|
|
SESSION_TABLE MIB_SessionTable = { 0, NULL };
|
|
|
|
//--------------------------- PRIVATE CONSTANTS -----------------------------
|
|
|
|
#define SESS_FIELD_SUBID (MIB_SessPrefix.idLength+MIB_OidPrefix.idLength)
|
|
|
|
#define SESS_FIRST_FIELD SESS_CLIENT_FIELD
|
|
#define SESS_LAST_FIELD SESS_STATE_FIELD
|
|
|
|
//--------------------------- PRIVATE STRUCTS -------------------------------
|
|
|
|
//--------------------------- PRIVATE VARIABLES -----------------------------
|
|
|
|
//--------------------------- PRIVATE PROTOTYPES ----------------------------
|
|
|
|
UINT MIB_sess_get(
|
|
IN OUT RFC1157VarBind *VarBind
|
|
);
|
|
|
|
int MIB_sess_match(
|
|
IN AsnObjectIdentifier *Oid,
|
|
OUT UINT *Pos,
|
|
IN BOOL Next
|
|
);
|
|
|
|
UINT MIB_sess_copyfromtable(
|
|
IN UINT Entry,
|
|
IN UINT Field,
|
|
OUT RFC1157VarBind *VarBind
|
|
);
|
|
|
|
//--------------------------- PRIVATE PROCEDURES ----------------------------
|
|
|
|
//--------------------------- PUBLIC PROCEDURES -----------------------------
|
|
|
|
//
|
|
// MIB_sess_func
|
|
// High level routine for handling operations on the session table
|
|
//
|
|
// Notes:
|
|
//
|
|
// Return Codes:
|
|
// None.
|
|
//
|
|
// Error Codes:
|
|
// None.
|
|
//
|
|
UINT MIB_sess_func(
|
|
IN UINT Action,
|
|
IN MIB_ENTRY *MibPtr,
|
|
IN OUT RFC1157VarBind *VarBind
|
|
)
|
|
|
|
{
|
|
int Found;
|
|
UINT Entry;
|
|
UINT Field;
|
|
UINT ErrStat;
|
|
|
|
|
|
switch ( Action )
|
|
{
|
|
case MIB_ACTION_GETFIRST:
|
|
// Fill the Session table with the info from server
|
|
if ( SNMPAPI_ERROR == MIB_sess_lmget() )
|
|
{
|
|
ErrStat = SNMP_ERRORSTATUS_GENERR;
|
|
goto Exit;
|
|
}
|
|
|
|
// If no elements in table, then return next MIB var, if one
|
|
if ( MIB_SessionTable.Len == 0 )
|
|
{
|
|
if ( MibPtr->MibNext == NULL )
|
|
{
|
|
ErrStat = SNMP_ERRORSTATUS_NOSUCHNAME;
|
|
goto Exit;
|
|
}
|
|
|
|
// Do get first on the next MIB var
|
|
ErrStat = (*MibPtr->MibNext->MibFunc)( Action, MibPtr->MibNext,
|
|
VarBind );
|
|
break;
|
|
}
|
|
|
|
//
|
|
// Place correct OID in VarBind
|
|
// Assuming the first field in the first record is the "start"
|
|
{
|
|
UINT temp_subs[] = { SESS_FIRST_FIELD };
|
|
AsnObjectIdentifier FieldOid = { 1, temp_subs };
|
|
|
|
|
|
SnmpUtilOidFree( &VarBind->name );
|
|
SnmpUtilOidCpy( &VarBind->name, &MIB_OidPrefix );
|
|
SnmpUtilOidAppend( &VarBind->name, &MIB_SessPrefix );
|
|
SnmpUtilOidAppend( &VarBind->name, &FieldOid );
|
|
SnmpUtilOidAppend( &VarBind->name, &MIB_SessionTable.Table[0].Oid );
|
|
}
|
|
|
|
//
|
|
// Let fall through on purpose
|
|
//
|
|
|
|
case MIB_ACTION_GET:
|
|
ErrStat = MIB_sess_get( VarBind );
|
|
break;
|
|
|
|
case MIB_ACTION_GETNEXT:
|
|
// Fill the Session table with the info from server
|
|
if ( SNMPAPI_ERROR == MIB_sess_lmget() )
|
|
{
|
|
ErrStat = SNMP_ERRORSTATUS_GENERR;
|
|
goto Exit;
|
|
}
|
|
|
|
// Determine which field
|
|
Field = VarBind->name.ids[SESS_FIELD_SUBID];
|
|
|
|
// Lookup OID in table
|
|
if (Field < SESS_FIRST_FIELD)
|
|
{
|
|
Entry = 0; // will take the first entry into the table
|
|
Field = SESS_FIRST_FIELD; // and the first column of the table
|
|
Found = MIB_TBL_POS_BEFORE;
|
|
}
|
|
else if (Field > SESS_LAST_FIELD)
|
|
Found = MIB_TBL_POS_END;
|
|
else
|
|
Found = MIB_sess_match( &VarBind->name, &Entry, TRUE );
|
|
|
|
// Index not found, but could be more fields to base GET on
|
|
if ((Found == MIB_TBL_POS_BEFORE && MIB_SessionTable.Len == 0) ||
|
|
Found == MIB_TBL_POS_END )
|
|
{
|
|
// Index not found in table, get next from field
|
|
// Field ++;
|
|
|
|
// Make sure not past last field
|
|
// if ( Field > SESS_LAST_FIELD )
|
|
// {
|
|
// Get next VAR in MIB
|
|
ErrStat = (*MibPtr->MibNext->MibFunc)( MIB_ACTION_GETFIRST,
|
|
MibPtr->MibNext,
|
|
VarBind );
|
|
break;
|
|
// }
|
|
}
|
|
|
|
// Get next TABLE entry
|
|
if ( Found == MIB_TBL_POS_FOUND )
|
|
{
|
|
Entry ++;
|
|
if ( Entry > MIB_SessionTable.Len-1 )
|
|
{
|
|
Entry = 0;
|
|
Field ++;
|
|
|
|
/* item not implemented. Skip */
|
|
|
|
if (Field == SESS_NUMCONS_FIELD) {
|
|
Field++;
|
|
}
|
|
|
|
if ( Field > SESS_LAST_FIELD )
|
|
{
|
|
// Get next VAR in MIB
|
|
ErrStat = (*MibPtr->MibNext->MibFunc)( MIB_ACTION_GETFIRST,
|
|
MibPtr->MibNext,
|
|
VarBind );
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Place correct OID in VarBind
|
|
// Assuming the first field in the first record is the "start"
|
|
{
|
|
UINT temp_subs[1];
|
|
AsnObjectIdentifier FieldOid;
|
|
|
|
temp_subs[0] = Field;
|
|
FieldOid.idLength = 1;
|
|
FieldOid.ids = temp_subs;
|
|
|
|
SnmpUtilOidFree( &VarBind->name );
|
|
SnmpUtilOidCpy( &VarBind->name, &MIB_OidPrefix );
|
|
SnmpUtilOidAppend( &VarBind->name, &MIB_SessPrefix );
|
|
SnmpUtilOidAppend( &VarBind->name, &FieldOid );
|
|
SnmpUtilOidAppend( &VarBind->name, &MIB_SessionTable.Table[Entry].Oid );
|
|
}
|
|
|
|
ErrStat = MIB_sess_copyfromtable( Entry, Field, VarBind );
|
|
|
|
break;
|
|
|
|
case MIB_ACTION_SET:
|
|
// Make sure OID is long enough
|
|
if ( SESS_FIELD_SUBID + 1 > VarBind->name.idLength )
|
|
{
|
|
ErrStat = SNMP_ERRORSTATUS_NOSUCHNAME;
|
|
goto Exit;
|
|
}
|
|
|
|
// Get field number
|
|
Field = VarBind->name.ids[SESS_FIELD_SUBID];
|
|
|
|
// If the field being set is not the STATE field, error
|
|
if ( Field != SESS_STATE_FIELD )
|
|
{
|
|
ErrStat = SNMP_ERRORSTATUS_NOSUCHNAME;
|
|
goto Exit;
|
|
}
|
|
|
|
// Check for proper type before setting
|
|
if ( ASN_INTEGER != VarBind->value.asnType )
|
|
{
|
|
ErrStat = SNMP_ERRORSTATUS_BADVALUE;
|
|
goto Exit;
|
|
}
|
|
|
|
// Make sure that the value is valid
|
|
if ( VarBind->value.asnValue.number < SESS_STATE_ACTIVE &&
|
|
VarBind->value.asnValue.number > SESS_STATE_DELETED )
|
|
{
|
|
ErrStat = SNMP_ERRORSTATUS_BADVALUE;
|
|
goto Exit;
|
|
}
|
|
|
|
ErrStat = MIB_sess_lmset( &VarBind->name, Field, &VarBind->value );
|
|
|
|
break;
|
|
|
|
default:
|
|
ErrStat = SNMP_ERRORSTATUS_GENERR;
|
|
}
|
|
|
|
Exit:
|
|
return ErrStat;
|
|
} // MIB_sess_func
|
|
|
|
|
|
|
|
//
|
|
// MIB_sess_get
|
|
// Retrieve session table information.
|
|
//
|
|
// Notes:
|
|
//
|
|
// Return Codes:
|
|
// None.
|
|
//
|
|
// Error Codes:
|
|
// None.
|
|
//
|
|
UINT MIB_sess_get(
|
|
IN OUT RFC1157VarBind *VarBind
|
|
)
|
|
|
|
{
|
|
UINT Entry;
|
|
int Found;
|
|
UINT ErrStat;
|
|
|
|
if (VarBind->name.ids[SESS_FIELD_SUBID] < SESS_FIRST_FIELD ||
|
|
VarBind->name.ids[SESS_FIELD_SUBID] > SESS_LAST_FIELD)
|
|
{
|
|
ErrStat = SNMP_ERRORSTATUS_NOSUCHNAME;
|
|
goto Exit;
|
|
}
|
|
|
|
// Fill the Session table with the info from server
|
|
if ( SNMPAPI_ERROR == MIB_sess_lmget() )
|
|
{
|
|
ErrStat = SNMP_ERRORSTATUS_GENERR;
|
|
goto Exit;
|
|
}
|
|
|
|
Found = MIB_sess_match( &VarBind->name, &Entry, FALSE );
|
|
|
|
// Look for a complete OID match
|
|
if ( Found != MIB_TBL_POS_FOUND )
|
|
{
|
|
ErrStat = SNMP_ERRORSTATUS_NOSUCHNAME;
|
|
goto Exit;
|
|
}
|
|
|
|
if ( VarBind->name.ids[SESS_FIELD_SUBID] == SESS_NUMCONS_FIELD )
|
|
{
|
|
ErrStat = SNMP_ERRORSTATUS_NOSUCHNAME;
|
|
goto Exit;
|
|
}
|
|
|
|
// Copy data from table
|
|
ErrStat = MIB_sess_copyfromtable( Entry, VarBind->name.ids[SESS_FIELD_SUBID],
|
|
VarBind );
|
|
|
|
Exit:
|
|
return ErrStat;
|
|
} // MIB_sess_get
|
|
|
|
|
|
|
|
//
|
|
// MIB_sess_match
|
|
// Match the target OID with a location in the Session table
|
|
//
|
|
// Notes:
|
|
//
|
|
// Return Codes:
|
|
// None.
|
|
//
|
|
// Error Codes:
|
|
// None
|
|
//
|
|
int MIB_sess_match(
|
|
IN AsnObjectIdentifier *Oid,
|
|
OUT UINT *Pos,
|
|
IN BOOL Next
|
|
)
|
|
|
|
{
|
|
AsnObjectIdentifier TempOid;
|
|
int nResult;
|
|
|
|
|
|
// Remove prefix including field reference
|
|
TempOid.idLength = Oid->idLength - MIB_OidPrefix.idLength -
|
|
MIB_SessPrefix.idLength - 1;
|
|
TempOid.ids = &Oid->ids[MIB_OidPrefix.idLength+MIB_SessPrefix.idLength+1];
|
|
|
|
*Pos = 0;
|
|
while ( *Pos < MIB_SessionTable.Len )
|
|
{
|
|
nResult = SnmpUtilOidCmp( &TempOid, &MIB_SessionTable.Table[*Pos].Oid );
|
|
if ( !nResult )
|
|
{
|
|
nResult = MIB_TBL_POS_FOUND;
|
|
if (Next) {
|
|
while ( ( (*Pos) + 1 < MIB_SessionTable.Len ) &&
|
|
!SnmpUtilOidCmp( &TempOid, &MIB_SessionTable.Table[(*Pos)+1].Oid)) {
|
|
(*Pos)++;
|
|
}
|
|
}
|
|
|
|
goto Exit;
|
|
}
|
|
|
|
if ( nResult < 0 )
|
|
{
|
|
nResult = MIB_TBL_POS_BEFORE;
|
|
|
|
goto Exit;
|
|
}
|
|
|
|
(*Pos)++;
|
|
}
|
|
|
|
nResult = MIB_TBL_POS_END;
|
|
|
|
Exit:
|
|
return nResult;
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// MIB_sess_copyfromtable
|
|
// Copy requested data from table structure into Var Bind.
|
|
//
|
|
// Notes:
|
|
//
|
|
// Return Codes:
|
|
// None.
|
|
//
|
|
// Error Codes:
|
|
// None.
|
|
//
|
|
UINT MIB_sess_copyfromtable(
|
|
IN UINT Entry,
|
|
IN UINT Field,
|
|
OUT RFC1157VarBind *VarBind
|
|
)
|
|
|
|
{
|
|
UINT ErrStat;
|
|
|
|
|
|
// Get the requested field and save in var bind
|
|
switch( Field )
|
|
{
|
|
case SESS_CLIENT_FIELD:
|
|
// Alloc space for string
|
|
VarBind->value.asnValue.string.stream = SnmpUtilMemAlloc( sizeof(char)
|
|
* MIB_SessionTable.Table[Entry].svSesClientName.length );
|
|
if ( VarBind->value.asnValue.string.stream == NULL )
|
|
{
|
|
ErrStat = SNMP_ERRORSTATUS_GENERR;
|
|
goto Exit;
|
|
}
|
|
|
|
// Copy string into return position
|
|
memcpy( VarBind->value.asnValue.string.stream,
|
|
MIB_SessionTable.Table[Entry].svSesClientName.stream,
|
|
MIB_SessionTable.Table[Entry].svSesClientName.length );
|
|
|
|
// Set string length
|
|
VarBind->value.asnValue.string.length =
|
|
MIB_SessionTable.Table[Entry].svSesClientName.length;
|
|
VarBind->value.asnValue.string.dynamic = TRUE;
|
|
|
|
// Set type of var bind
|
|
VarBind->value.asnType = ASN_RFC1213_DISPSTRING;
|
|
break;
|
|
|
|
case SESS_USER_FIELD:
|
|
// Alloc space for string
|
|
VarBind->value.asnValue.string.stream = SnmpUtilMemAlloc( sizeof(char)
|
|
* MIB_SessionTable.Table[Entry].svSesUserName.length );
|
|
if ( VarBind->value.asnValue.string.stream == NULL )
|
|
{
|
|
ErrStat = SNMP_ERRORSTATUS_GENERR;
|
|
goto Exit;
|
|
}
|
|
|
|
// Copy string into return position
|
|
memcpy( VarBind->value.asnValue.string.stream,
|
|
MIB_SessionTable.Table[Entry].svSesUserName.stream,
|
|
MIB_SessionTable.Table[Entry].svSesUserName.length );
|
|
|
|
// Set string length
|
|
VarBind->value.asnValue.string.length =
|
|
MIB_SessionTable.Table[Entry].svSesUserName.length;
|
|
VarBind->value.asnValue.string.dynamic = TRUE;
|
|
|
|
// Set type of var bind
|
|
VarBind->value.asnType = ASN_RFC1213_DISPSTRING;
|
|
break;
|
|
|
|
case SESS_NUMCONS_FIELD:
|
|
VarBind->value.asnValue.number =
|
|
MIB_SessionTable.Table[Entry].svSesNumConns;
|
|
VarBind->value.asnType = ASN_INTEGER;
|
|
break;
|
|
|
|
case SESS_NUMOPENS_FIELD:
|
|
VarBind->value.asnValue.number =
|
|
MIB_SessionTable.Table[Entry].svSesNumOpens;
|
|
VarBind->value.asnType = ASN_INTEGER;
|
|
break;
|
|
|
|
case SESS_TIME_FIELD:
|
|
VarBind->value.asnValue.number =
|
|
MIB_SessionTable.Table[Entry].svSesTime;
|
|
VarBind->value.asnType = ASN_RFC1155_COUNTER;
|
|
break;
|
|
|
|
case SESS_IDLETIME_FIELD:
|
|
VarBind->value.asnValue.number =
|
|
MIB_SessionTable.Table[Entry].svSesIdleTime;
|
|
VarBind->value.asnType = ASN_RFC1155_COUNTER;
|
|
break;
|
|
|
|
case SESS_CLIENTTYPE_FIELD:
|
|
VarBind->value.asnValue.number =
|
|
MIB_SessionTable.Table[Entry].svSesClientType;
|
|
VarBind->value.asnType = ASN_INTEGER;
|
|
break;
|
|
|
|
case SESS_STATE_FIELD:
|
|
VarBind->value.asnValue.number =
|
|
MIB_SessionTable.Table[Entry].svSesState;
|
|
VarBind->value.asnType = ASN_INTEGER;
|
|
break;
|
|
|
|
default:
|
|
SNMPDBG(( SNMP_LOG_TRACE, "LMMIB2: Internal Error Session Table\n" ));
|
|
ErrStat = SNMP_ERRORSTATUS_GENERR;
|
|
|
|
goto Exit;
|
|
}
|
|
|
|
ErrStat = SNMP_ERRORSTATUS_NOERROR;
|
|
|
|
Exit:
|
|
return ErrStat;
|
|
} // MIB_sess_copyfromtable
|
|
|
|
//-------------------------------- END --------------------------------------
|