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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 37064] New: - wrong timestamp value in UNIQUE_ID on mod_unique_id in Apache2.0.54
Date Thu, 13 Oct 2005 07:17:16 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=37064

           Summary: wrong timestamp value in UNIQUE_ID on mod_unique_id in
                    Apache2.0.54
           Product: Apache httpd-2.0
           Version: 2.0.54
          Platform: Other
        OS/Version: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: mod_unique_id
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: kobayashi@firstserver.co.jp


Dear all,

I found the value of timestamp in UNIQUE_ID is always wrong in my environment. 
I decoded the value and confirmed that the value was be completely different 
from real one, it didn't has continuousness for requested time, and it looked 
like random numbers.

The reason comes from the difference from variable type. i.e. the variable 
type of unique_id_rec.stamp is a 'unsigned int' but a type of 
request_rec.request_time is 'apr_time_t', which is apr_int64_t. So, timestamp 
results in the value set mainly microsecond part.

The following change will be needed to use correct timestamp.

307c307
<     new_unique_id.stamp = htonl((unsigned int)r->request_time);
---
>     new_unique_id.stamp = htonl((unsigned int)(r-
>request_time/APR_USEC_PER_SEC));

(*one line respectively*)


Thank you.


**FYI:  'requested_time' is set as follows
--in httpd-2.0.52/srclib/apr/time/unix/time.c---
APR_DECLARE(apr_time_t) apr_time_now(void)
{
    struct timeval tv;
    gettimeofday(&tv, NULL);
    return tv.tv_sec * APR_USEC_PER_SEC + tv.tv_usec;
}

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