267 lines
8.5 KiB
C
267 lines
8.5 KiB
C
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/*++
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Copyright (c) 1991-1993 Microsoft Corporation
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Module Name:
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TOD.c
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Abstract:
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This file contains the RpcXlate code to handle the NetRemote APIs
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that can't be handled by simple calls to RxRemoteApi.
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Author:
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John Rogers (JohnRo) 02-Apr-1991
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Environment:
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Portable to any flat, 32-bit environment. (Uses Win32 typedefs.)
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Requires ANSI C extensions: slash-slash comments, long external names.
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This code assumes that time_t is expressed in seconds since 1970 (GMT).
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ANSI C does not require this, although POSIX (IEEE 1003.1) does.
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Revision History:
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02-Apr-1991 JohnRo
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Created.
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13-Apr-1991 JohnRo
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Moved API handlers into per-group header files (e.g. RxServer.h).
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Quiet debug output by default.
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Reduced recompile hits from header files.
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03-May-1991 JohnRo
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Changed to use both 16-bit data desc and SMB data desc. Use LPTSTR.
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Call RxpTransactSmb with UNC server name.
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06-May-1991 JohnRo
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Use RxpComputeRequestBufferSize(). Use correct print strings for
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server name and descriptors.
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15-May-1991 JohnRo
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Added conversion mode handling.
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19-May-1991 JohnRo
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Make LINT-suggested changes. Got rid of tabs (again).
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17-Jul-1991 JohnRo
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Extracted RxpDebug.h from Rxp.h.
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25-Sep-1991 JohnRo
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Handle RapConvertSingleEntry's new return code.
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21-Nov-1991 JohnRo
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Removed NT dependencies to reduce recompiles.
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07-Feb-1992 JohnRo
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Use NetApiBufferAllocate() instead of private version.
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15-Apr-1992 JohnRo
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FORMAT_POINTER is obsolete.
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18-Aug-1992 JohnRo
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RAID 2920: Support UTC timezone in net code.
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Use PREFIX_ equates.
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01-Oct-1992 JohnRo
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RAID 3556: Added NetpSystemTimeToGmtTime() for DosPrint APIs.
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10-Jun-1993 JohnRo
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RAID 13081: NetRemoteTOD should return timezone info in right units.
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--*/
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// These must be included first:
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#include <windows.h> // IN, LPTSTR, etc.
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#include <lmcons.h>
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// These may be included in any order:
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#include <apinums.h>
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#include <lmapibuf.h> // NetApiBufferFree().
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#include <lmerr.h> // NO_ERROR, ERROR_ and NERR_ equates.
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#include <lmremutl.h> // Real API prototypes and #defines.
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#include <netdebug.h> // NetpKdPrint(()), FORMAT_ equates, etc.
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#include <prefix.h> // PREFIX_ equates.
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#include <remdef.h> // 16-bit and 32-bit descriptor strings.
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#include <rx.h> // RxRemoteApi().
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#include <rxpdebug.h> // IF_DEBUG().
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#include <rxremutl.h> // My prototype.
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#include <time.h> // gmtime(), struct tm, time_t.
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#include <timelib.h> // NetpGmtTimeToLocalTime(), NetpLocalTimeZoneOffset().
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NET_API_STATUS
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RxNetRemoteTOD (
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IN LPTSTR UncServerName,
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OUT LPBYTE *BufPtr
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)
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/*++
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Routine Description:
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RxNetRemoteTOD performs the same function as NetRemoteTOD,
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except that the server name is known to refer to a downlevel server.
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Arguments:
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(Same as NetRemoteTOD, except UncServerName must not be null, and
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must not refer to the local computer.)
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Return Value:
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(Same as NetRemoteTOD.)
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--*/
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{
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NET_API_STATUS ApiStatus;
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time_t GmtTime; // seconds since 1970 (GMT).
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struct tm * pGmtTm; // broken down GMT time (static obj).
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PTIME_OF_DAY_INFO pGmtTod = NULL; // TOD on remote sys, GMT timezone.
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LONG LocalTimeZoneOffsetSecs; // offset (+ for West of GMT, etc).
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TIME_OF_DAY_INFO LocalTod; // TOD on remote sys, local timezone.
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LONG timezone;
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NetpAssert(UncServerName != NULL);
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IF_DEBUG(REMUTL) {
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NetpKdPrint(( PREFIX_NETAPI
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"RxNetRemoteTOD: starting, server='" FORMAT_LPTSTR "'.\n",
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UncServerName));
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}
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//
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// REM32_time_of_day_info, also used by XACTSRV, translates the
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// 16-bit local time returned from the server to GMT. Unfortunately
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// it uses the timezone of the local machine rather than the timezone
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// returned from the server. So, we have our own define here, which
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// uses 'J'instead of 'G' so that no translation takes place. Then
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// we do our own translation below. This makes us work with
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// Windows 95 servers.
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#define REM32_time_of_day_info_2 "JDDDDDXDDDDD"
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//
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// Get TOD structure (with local time values) from other system.
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// Note that the "tod_elapsedt" field will be converted from local
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// timezone to GMT by RxRemoteApi.
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//
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ApiStatus = RxRemoteApi(
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API_NetRemoteTOD, // API number
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(LPTSTR) UncServerName,
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REMSmb_NetRemoteTOD_P, // parm desc
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REM16_time_of_day_info, // DataDesc16
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REM32_time_of_day_info_2, // DataDesc32
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REMSmb_time_of_day_info, // DataDescSmb
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NULL, // no AuxDesc16
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NULL, // no AuxDesc32
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NULL, // no AuxDescSmb
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0, // flags: not a null session API
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// rest of API's arguments, in 32-bit LM2.x format:
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(LPVOID) & LocalTod, // pbBuffer
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sizeof(LocalTod) ); // cbBuffer
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IF_DEBUG(REMUTL) {
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NetpKdPrint(( PREFIX_NETAPI
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"RxNetRemoteTOD: after RxRemoteApi, "
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"ApiStatus=" FORMAT_API_STATUS ".\n", ApiStatus));
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}
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if (ApiStatus != NO_ERROR) {
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goto Cleanup;
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}
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//
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// Get info on the timezone itself. If target machine doesn't know, then
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// we have to fall back on the age-old policy: assume it is running in
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// same timezone that we are.
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//
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if (LocalTod.tod_timezone == -1) {
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//
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// First, get number of seconds from UTC. (Positive values for
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// west of Greenwich, negative values for east of Greenwich.)
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// Then, convert to minutes.
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LocalTimeZoneOffsetSecs = NetpLocalTimeZoneOffset();
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timezone = LocalTimeZoneOffsetSecs / 60;
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}
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else
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{
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timezone = LocalTod.tod_timezone;
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}
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//
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// Get GmtTime (time in seconds since 1970, GMT) for convenience.
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//
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NetpAssert( sizeof(DWORD) == sizeof(time_t) );
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GmtTime = (time_t) LocalTod.tod_elapsedt + timezone * 60;
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IF_DEBUG(REMUTL) {
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NetpKdPrint(( PREFIX_NETAPI
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"RxNetRemoteTOD: before convert, buffer:\n"));
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NetpDbgDisplayTod( "before GMT conv", & LocalTod );
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NetpDbgDisplayTimestamp( "secs since 1970 (GMT)", (DWORD) GmtTime );
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}
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NetpAssert( GmtTime != 0 );
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NetpAssert( GmtTime != (time_t) (-1) );
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//
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// Alloc area for converted time of day info.
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// API's caller will free this with NetApiBufferFree().
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//
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ApiStatus = NetApiBufferAllocate(
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sizeof(TIME_OF_DAY_INFO),
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(LPVOID *) (LPVOID) & pGmtTod );
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if (ApiStatus != NO_ERROR) {
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NetpAssert( pGmtTod == NULL );
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goto Cleanup;
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}
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NetpAssert( pGmtTod != NULL );
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//
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// Convert LocalTod fields to UTC timezone and set pGmtTod fields.
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// This depends on the POSIX semantics of gmtime().
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//
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pGmtTm = gmtime( (time_t *) &(GmtTime) );
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if (pGmtTm == NULL) {
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// UTC not available? How can this happen?
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NetpKdPrint(( PREFIX_NETAPI
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"RxNetRemoteTOD: gmtime() failed!.\n" ));
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ApiStatus = NERR_InternalError;
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goto Cleanup;
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}
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pGmtTod->tod_elapsedt = (DWORD) GmtTime;
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pGmtTod->tod_msecs = LocalTod.tod_msecs;
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pGmtTod->tod_hours = pGmtTm->tm_hour;
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pGmtTod->tod_mins = pGmtTm->tm_min;
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if (pGmtTm->tm_sec <= 59) {
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// Normal.
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pGmtTod->tod_secs = pGmtTm->tm_sec;
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} else {
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// Leap second. Lie and say that it's not. This will avoid possible
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// range problems in apps that only expect 0..59, as the
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// TIME_OF_DAY_INFO struct is documented in LM 2.x.
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pGmtTod->tod_secs = 59;
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}
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pGmtTod->tod_hunds = LocalTod.tod_hunds;
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pGmtTod->tod_tinterval = LocalTod.tod_tinterval;
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pGmtTod->tod_day = pGmtTm->tm_mday;
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pGmtTod->tod_month = pGmtTm->tm_mon + 1; // month (0..11) to (1..12)
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pGmtTod->tod_year = pGmtTm->tm_year + 1900;
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pGmtTod->tod_weekday = pGmtTm->tm_wday;
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pGmtTod->tod_timezone = timezone;
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IF_DEBUG(REMUTL) {
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NetpKdPrint(( PREFIX_NETAPI
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"RxNetRemoteTOD: after convert, buffer:\n"));
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NetpDbgDisplayTod( "after GMT conv", pGmtTod );
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}
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Cleanup:
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if (ApiStatus == NO_ERROR) {
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*BufPtr = (LPBYTE) (LPVOID) pGmtTod;
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} else if (pGmtTod != NULL) {
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(VOID) NetApiBufferFree( pGmtTod );
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}
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return (ApiStatus);
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} // RxNetRemoteTOD
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