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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/krb5/os/ustime.c */
/*
* Copyright 1990,1991,2007 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
/*
* krb5_crypto_us_timeofday() does all of the real work; however, we
* handle the time offset adjustment here, since this is context
* specific, and the crypto version of this call doesn't have access
* to the context variable. Fortunately the only user of
* krb5_crypto_us_timeofday in the crypto library doesn't require that
* this time adjustment be done.
*/
#include "k5-int.h"
#include "os-proto.h"
krb5_error_code
k5_time_with_offset(krb5_timestamp offset, krb5_int32 offset_usec,
krb5_timestamp *time_out, krb5_int32 *usec_out)
{
krb5_int32 sec, usec;
krb5_error_code retval;
retval = krb5_crypto_us_timeofday(&sec, &usec);
if (retval)
return retval;
usec += offset_usec;
if (usec > 1000000) {
usec -= 1000000;
sec++;
}
if (usec < 0) {
usec += 1000000;
sec--;
}
sec += offset;
*time_out = sec;
*usec_out = usec;
return 0;
}
krb5_error_code KRB5_CALLCONV
krb5_us_timeofday(krb5_context context, krb5_timestamp *seconds,
krb5_int32 *microseconds)
{
krb5_os_context os_ctx = &context->os_context;
if (os_ctx->os_flags & KRB5_OS_TOFFSET_TIME) {
*seconds = os_ctx->time_offset;
*microseconds = os_ctx->usec_offset;
return 0;
} else if (os_ctx->os_flags & KRB5_OS_TOFFSET_VALID) {
return k5_time_with_offset(os_ctx->time_offset, os_ctx->usec_offset,
seconds, microseconds);
} else {
return krb5_crypto_us_timeofday(seconds, microseconds);
}
}
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