622 lines
14 KiB
C
622 lines
14 KiB
C
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/*++ BUILD Version: 0001 // Increment this if a change has global effects
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Copyright (c) 1991 Microsoft Corporation
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Module Name:
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mib.c
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Abstract:
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SNMP Extension Agent for Windows NT.
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Created:
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18-Feb-1995
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Revision History:
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--*/
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#include "mib.h"
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//
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// Private constants & macros.
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//
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//
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// This macro creates a MIB_ENTRY for a MIB group header.
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//
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#define MIB_ENTRY_HEADER(oid) \
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{ \
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{ OID_SIZEOF(oid), (oid) }, \
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-1, \
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MIB_NOACCESS, \
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NULL, \
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ASN_RFC1155_OPAQUE, \
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}
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//
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// This macro creates a generic MIB_ENTRY for a MIB variable.
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//
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#define MIB_ENTRY_ITEM(oid,field,type) \
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{ \
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{ OID_SIZEOF(oid), (oid) }, \
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FIELD_OFFSET(FTP_STATISTICS_0,field), \
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MIB_ACCESS_READ, \
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MIB_Stat, \
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(type), \
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}
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//
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// These macros create COUNTER and INTEGER type MIB_ENTRYs.
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//
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#define MIB_COUNTER(oid,field) \
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MIB_ENTRY_ITEM(oid, field, ASN_RFC1155_COUNTER)
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#define MIB_INTEGER(oid,field) \
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MIB_ENTRY_ITEM(oid, field, ASN_INTEGER)
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//
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// Private types.
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//
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typedef UINT (*LPMIBFUNC)( UINT Action,
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struct _MIB_ENTRY * MibPtr,
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RFC1157VarBind * VarBind,
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LPVOID Statistics
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);
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typedef struct _MIB_ENTRY
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{
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//
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// The OID for this MIB variable.
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//
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AsnObjectIdentifier Oid;
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//
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// The offset within the statistics structure for this
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// variable.
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//
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LONG FieldOffset;
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//
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// Access type (read, write, read-write, none).
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//
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UINT Access;
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//
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// Pointer to a function that manages this variable.
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//
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LPMIBFUNC MibFunc;
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//
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// Type (integer, counter, gauge, etc.)
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//
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BYTE Type;
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} MIB_ENTRY;
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//
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// Private globals.
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//
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//
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// The InternetServer section of the OID tree is organized as follows:
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//
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// iso(1)
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// org(3)
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// dod(6)
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// internet(1)
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// private(4)
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// enterprises(1)
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// microsoft(311)
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// software(1)
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// InternetServer(7)
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// InetSrvCommon(1)
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// InetSrvStatistics(1)
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// FtpServer(2)
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// FtpStatistics(1)
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// W3Server(3)
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// W3Statistics(1)
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// GopherServer(4)
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// GopherStatistics(1)
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//
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UINT OID_Prefix[] = { 1, 3, 6, 1, 4, 1, 311, 1, 7, 2 };
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AsnObjectIdentifier MIB_OidPrefix = { OID_SIZEOF(OID_Prefix), OID_Prefix };
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//
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// OID definitions.
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//
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// All leaf variables have a zero appended to their OID to indicate
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// that it is the only instance of this variable and that it exists.
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//
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UINT MIB_Statistics[] = { 1 };
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UINT MIB_TotalBytesSent_HighWord[] = { 1, 1, 0 };
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UINT MIB_TotalBytesSent_LowWord[] = { 1, 2, 0 };
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UINT MIB_TotalBytesReceived_HighWord[] = { 1, 3, 0 };
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UINT MIB_TotalBytesReceived_LowWord[] = { 1, 4, 0 };
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UINT MIB_TotalFilesSent[] = { 1, 5, 0 };
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UINT MIB_TotalFilesReceived[] = { 1, 6, 0 };
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UINT MIB_CurrentAnonymousUsers[] = { 1, 7, 0 };
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UINT MIB_CurrentNonAnonymousUsers[] = { 1, 8, 0 };
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UINT MIB_TotalAnonymousUsers[] = { 1, 9, 0 };
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UINT MIB_TotalNonAnonymousUsers[] = { 1, 10, 0 };
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UINT MIB_MaxAnonymousUsers[] = { 1, 11, 0 };
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UINT MIB_MaxNonAnonymousUsers[] = { 1, 12, 0 };
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UINT MIB_CurrentConnections[] = { 1, 13, 0 };
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UINT MIB_MaxConnections[] = { 1, 14, 0 };
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UINT MIB_ConnectionAttempts[] = { 1, 15, 0 };
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UINT MIB_LogonAttempts[] = { 1, 16, 0 };
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//
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// Private prototypes.
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//
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UINT
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MIB_leaf_func(
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UINT Action,
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MIB_ENTRY * MibPtr,
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RFC1157VarBind * VarBind,
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LPVOID Statistics
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);
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UINT
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MIB_Stat(
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UINT Action,
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MIB_ENTRY * MibPtr,
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RFC1157VarBind * VarBind,
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LPVOID Statistics
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);
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UINT
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GetNextVar(
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RFC1157VarBind * VarBind,
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MIB_ENTRY * MibPtr,
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LPVOID Statistics
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);
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//
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// MIB definiton
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//
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MIB_ENTRY Mib[] =
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{
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//
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// Statistics.
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//
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MIB_ENTRY_HEADER( MIB_Statistics ),
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MIB_COUNTER( MIB_TotalBytesSent_HighWord, TotalBytesSent.HighPart ),
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MIB_COUNTER( MIB_TotalBytesSent_LowWord, TotalBytesSent.LowPart ),
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MIB_COUNTER( MIB_TotalBytesReceived_HighWord, TotalBytesReceived.HighPart ),
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MIB_COUNTER( MIB_TotalBytesReceived_LowWord, TotalBytesReceived.LowPart ),
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MIB_COUNTER( MIB_TotalFilesSent, TotalFilesSent ),
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MIB_COUNTER( MIB_TotalFilesReceived, TotalFilesReceived ),
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MIB_INTEGER( MIB_CurrentAnonymousUsers, CurrentAnonymousUsers ),
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MIB_INTEGER( MIB_CurrentNonAnonymousUsers, CurrentNonAnonymousUsers ),
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MIB_COUNTER( MIB_TotalAnonymousUsers, TotalAnonymousUsers ),
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MIB_COUNTER( MIB_TotalNonAnonymousUsers, TotalNonAnonymousUsers ),
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MIB_COUNTER( MIB_MaxAnonymousUsers, MaxAnonymousUsers ),
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MIB_COUNTER( MIB_MaxNonAnonymousUsers, MaxNonAnonymousUsers ),
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MIB_INTEGER( MIB_CurrentConnections, CurrentConnections ),
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MIB_COUNTER( MIB_MaxConnections, MaxConnections ),
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MIB_COUNTER( MIB_ConnectionAttempts, ConnectionAttempts ),
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MIB_COUNTER( MIB_LogonAttempts, LogonAttempts )
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};
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#define NUM_MIB_ENTRIES ( sizeof(Mib) / sizeof(MIB_ENTRY) )
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//
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// Public functions.
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//
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UINT
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ResolveVarBind(
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RFC1157VarBind * VarBind,
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UINT PduAction,
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LPVOID Statistics
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)
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//
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// ResolveVarBind
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// Resolves a single variable binding. Modifies the variable on a GET
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// or a GET-NEXT.
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//
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// Notes:
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//
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// Return Codes:
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// Standard PDU error codes.
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//
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// Error Codes:
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// None.
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//
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{
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MIB_ENTRY *MibPtr;
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AsnObjectIdentifier TempOid;
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int CompResult;
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UINT i;
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UINT nResult;
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DWORD TableIndex;
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BOOL fTableMatch = FALSE;
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//
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// Search for a varbind name in the MIB.
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//
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MibPtr = NULL;
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for( i = 0 ; i < NUM_MIB_ENTRIES ; i++ )
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{
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//
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// Create a fully qualified OID for the current item in the MIB.
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//
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SNMP_oidcpy( &TempOid, &MIB_OidPrefix );
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SNMP_oidappend( &TempOid, &Mib[i].Oid );
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//
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// See if the given OID is in the MIB.
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//
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CompResult = SNMP_oidcmp( &VarBind->name, &TempOid );
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SNMP_oidfree( &TempOid );
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//
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// If result is negative, only valid operation is GET-NEXT.
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//
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if( CompResult < 0 )
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{
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//
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// This could be the OID of a leaf (without a trailing 0) or
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// it could be an invalid OID (between two valid OIDs).
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//
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if( PduAction == MIB_GETNEXT )
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{
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MibPtr = &Mib[i];
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SNMP_oidfree( &VarBind->name );
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SNMP_oidcpy( &VarBind->name, &MIB_OidPrefix );
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SNMP_oidappend( &VarBind->name, &MibPtr->Oid );
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if( ( MibPtr->Type != ASN_RFC1155_OPAQUE ) &&
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( MibPtr->Type != ASN_SEQUENCE ) )
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{
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PduAction = MIB_GET;
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}
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}
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else
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{
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nResult = SNMP_ERRORSTATUS_NOSUCHNAME;
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goto Exit;
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}
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break;
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}
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else
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if( CompResult == 0 )
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{
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//
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// Found one!
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//
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MibPtr = &Mib[i];
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break;
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}
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}
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if( i < NUM_MIB_ENTRIES )
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{
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//
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// The associated function pointer will be NULL only if the
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// match was with a group OID.
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//
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if( MibPtr->MibFunc == NULL )
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{
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if( PduAction == MIB_GETNEXT )
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{
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nResult = GetNextVar( VarBind, MibPtr, Statistics );
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}
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else
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{
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nResult = SNMP_ERRORSTATUS_NOSUCHNAME;
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}
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goto Exit;
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}
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}
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else
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{
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nResult = SNMP_ERRORSTATUS_NOSUCHNAME;
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goto Exit;
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}
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//
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// Call the associated function to process the request.
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//
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nResult = (MibPtr->MibFunc)( PduAction, MibPtr, VarBind, Statistics );
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Exit:
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return nResult;
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} // ResolveVarBind
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//
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// Private functions.
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//
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//
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// MIB_leaf_func
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// Performs generic actions on LEAF variables in the MIB.
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//
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// Notes:
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//
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// Return Codes:
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// Standard PDU error codes.
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//
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// Error Codes:
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// None.
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//
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UINT
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MIB_leaf_func(
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UINT Action,
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MIB_ENTRY * MibPtr,
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RFC1157VarBind * VarBind,
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LPVOID Statistics
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)
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{
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UINT Result;
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DWORD Value;
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switch( Action )
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{
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case MIB_GETNEXT :
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//
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// Determine if we're at the end of our MIB.
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//
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if( ( MibPtr - Mib ) >= NUM_MIB_ENTRIES )
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{
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Result = SNMP_ERRORSTATUS_NOSUCHNAME;
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goto Exit;
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}
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Result = GetNextVar( VarBind, MibPtr, Statistics );
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if (Result != SNMP_ERRORSTATUS_NOERROR)
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{
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goto Exit;
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}
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break;
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case MIB_GETFIRST :
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case MIB_GET :
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//
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// Make sure that this variable's ACCESS is GET'able.
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//
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if( ( MibPtr->Access != MIB_ACCESS_READ ) &&
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( MibPtr->Access != MIB_ACCESS_READWRITE ) )
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{
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|
|
Result = SNMP_ERRORSTATUS_NOSUCHNAME;
|
||
|
|
goto Exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Setup varbind's return value.
|
||
|
|
//
|
||
|
|
|
||
|
|
VarBind->value.asnType = MibPtr->Type;
|
||
|
|
|
||
|
|
Value = *(LPDWORD)( (LPBYTE)Statistics + MibPtr->FieldOffset );
|
||
|
|
|
||
|
|
switch( VarBind->value.asnType )
|
||
|
|
{
|
||
|
|
case ASN_RFC1155_COUNTER:
|
||
|
|
VarBind->value.asnValue.number = (AsnCounter)Value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ASN_RFC1155_GAUGE:
|
||
|
|
case ASN_INTEGER:
|
||
|
|
VarBind->value.asnValue.number = (AsnInteger)Value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ASN_RFC1155_IPADDRESS:
|
||
|
|
case ASN_OCTETSTRING:
|
||
|
|
//
|
||
|
|
// Not supported for this MIB (yet).
|
||
|
|
//
|
||
|
|
|
||
|
|
Result = SNMP_ERRORSTATUS_GENERR;
|
||
|
|
goto Exit;
|
||
|
|
|
||
|
|
default:
|
||
|
|
Result = SNMP_ERRORSTATUS_GENERR;
|
||
|
|
goto Exit;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case MIB_SET:
|
||
|
|
|
||
|
|
//
|
||
|
|
// We don't support settable variables (yet).
|
||
|
|
//
|
||
|
|
|
||
|
|
Result = SNMP_ERRORSTATUS_NOSUCHNAME;
|
||
|
|
goto Exit;
|
||
|
|
|
||
|
|
default:
|
||
|
|
Result = SNMP_ERRORSTATUS_GENERR;
|
||
|
|
goto Exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
Result = SNMP_ERRORSTATUS_NOERROR;
|
||
|
|
|
||
|
|
Exit:
|
||
|
|
|
||
|
|
return Result;
|
||
|
|
|
||
|
|
} // MIB_leaf_func
|
||
|
|
|
||
|
|
//
|
||
|
|
// MIB_Stat
|
||
|
|
// Performs specific actions on the different MIB variable.
|
||
|
|
//
|
||
|
|
// Notes:
|
||
|
|
//
|
||
|
|
// Return Codes:
|
||
|
|
// Standard PDU error codes.
|
||
|
|
//
|
||
|
|
// Error Codes:
|
||
|
|
// None.
|
||
|
|
//
|
||
|
|
UINT
|
||
|
|
MIB_Stat(
|
||
|
|
UINT Action,
|
||
|
|
MIB_ENTRY * MibPtr,
|
||
|
|
RFC1157VarBind * VarBind,
|
||
|
|
LPVOID Statistics
|
||
|
|
)
|
||
|
|
{
|
||
|
|
UINT Result;
|
||
|
|
|
||
|
|
switch( Action )
|
||
|
|
{
|
||
|
|
case MIB_SET :
|
||
|
|
case MIB_GETNEXT :
|
||
|
|
Result = MIB_leaf_func( Action, MibPtr, VarBind, Statistics );
|
||
|
|
break;
|
||
|
|
|
||
|
|
case MIB_GETFIRST :
|
||
|
|
case MIB_GET :
|
||
|
|
//
|
||
|
|
// If we have no statistics structure, bail.
|
||
|
|
//
|
||
|
|
|
||
|
|
if( Statistics == NULL )
|
||
|
|
{
|
||
|
|
Result = SNMP_ERRORSTATUS_GENERR;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// If there's no field offset associated with the current
|
||
|
|
// entry, also bail.
|
||
|
|
//
|
||
|
|
|
||
|
|
if( MibPtr->FieldOffset == -1 )
|
||
|
|
{
|
||
|
|
Result = SNMP_ERRORSTATUS_GENERR;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Call the generic leaf function to perform the action.
|
||
|
|
//
|
||
|
|
|
||
|
|
Result = MIB_leaf_func( Action, MibPtr, VarBind, Statistics );
|
||
|
|
break;
|
||
|
|
|
||
|
|
default :
|
||
|
|
Result = SNMP_ERRORSTATUS_GENERR;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return Result;
|
||
|
|
|
||
|
|
} // MIB_Stat
|
||
|
|
|
||
|
|
UINT
|
||
|
|
GetNextVar(
|
||
|
|
RFC1157VarBind * VarBind,
|
||
|
|
MIB_ENTRY * MibPtr,
|
||
|
|
LPVOID Statistics
|
||
|
|
)
|
||
|
|
{
|
||
|
|
UINT Result;
|
||
|
|
INT i;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Calculate the current index within the MIB array.
|
||
|
|
//
|
||
|
|
|
||
|
|
i = DIFF( MibPtr - Mib );
|
||
|
|
|
||
|
|
//
|
||
|
|
// Validate we have a reasonable value.
|
||
|
|
//
|
||
|
|
|
||
|
|
if( ( i < 0 ) || ( i >= NUM_MIB_ENTRIES ) )
|
||
|
|
{
|
||
|
|
return SNMP_ERRORSTATUS_NOSUCHNAME;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Scan through the remaining MIB entries.
|
||
|
|
//
|
||
|
|
|
||
|
|
for( i++ ; i < NUM_MIB_ENTRIES ; i++ )
|
||
|
|
{
|
||
|
|
MIB_ENTRY * NextMib;
|
||
|
|
|
||
|
|
NextMib = &Mib[i];
|
||
|
|
|
||
|
|
//
|
||
|
|
// Setup varbind name of next MIB variable.
|
||
|
|
//
|
||
|
|
|
||
|
|
SNMP_oidfree( &VarBind->name );
|
||
|
|
SNMP_oidcpy( &VarBind->name, &MIB_OidPrefix );
|
||
|
|
SNMP_oidappend( &VarBind->name, &NextMib->Oid );
|
||
|
|
|
||
|
|
//
|
||
|
|
// If the function pointer is not NULL and the type of the MIB
|
||
|
|
// variable is anything but OPAQUE, then call the function to
|
||
|
|
// process the MIB variable.
|
||
|
|
//
|
||
|
|
|
||
|
|
if( ( NextMib->MibFunc != NULL ) &&
|
||
|
|
( NextMib->Type != ASN_RFC1155_OPAQUE ) )
|
||
|
|
{
|
||
|
|
Result = (NextMib->MibFunc)( MIB_GETFIRST,
|
||
|
|
NextMib,
|
||
|
|
VarBind,
|
||
|
|
Statistics );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if( i >= NUM_MIB_ENTRIES )
|
||
|
|
{
|
||
|
|
Result = SNMP_ERRORSTATUS_NOSUCHNAME;
|
||
|
|
}
|
||
|
|
|
||
|
|
return Result;
|
||
|
|
|
||
|
|
} // GetNextVar
|
||
|
|
|