Re: getting the time

[Brian Oleksa <oleksab () darkcornersoftware com>]

Guy

To answer your questions: Yes this is UTC time since the epoc.

What I am trying to dissect has a bitmask attached to it. So all I have 
to do is check for fields available (which you will see below)

This is what I have done......I am confused on what you sent me. Can you 
give me an more detailed example..?? Here is my code so far:

Right now all I am getting is just a number:

The end result,  I would like to get something like this:  Jan 21 
2010    or    1/21/2010    or    1-21-2010

                    if ((fieldsAvail & 2) != 0) {
                        guint64 msecs_since_the_epoch;
                        nstime_t t;
                        msecs_since_the_epoch = *((guint64*) ptr);
                        t.secs = msecs_since_the_epoch/1000;
                        ptr += 8;

                        proto_tree_add_uint_format(helen_sub_tree, 
hf_helen_length, tvb, offset, 8, 0,
                                "TIME %d", t.secs);

                        offset += 8;
                    }

Thanks,
Brian



Guy Harris wrote:
> On Jan 20, 2010, at 1:34 PM, Brian Oleksa wrote:
>
>   
> > I forgot to add the format of the time stamp that I am trying to get.
> >
> > ms since the epoch (jan 1, 1970) as a 8 byte network byte order integer
> >
> > Is there built in functions that can be used..??
> >     
>
> Do you mean that you have a protocol that has an 8-byte network-byte-order integer whose value is a count of 
> milliseconds since midnight, January 1, 1970?
>
> The function to get the value would be tvb_get_ntoh64(), but that just gives you a guint64 count of milliseconds.
>
> If you want to add that to the protocol tree as an FT_ABSOLUTE_TIME, that requires more work.
>
> First - is that midnight, January 1, 1970, UTC, or midnight, January 1, 1970 *local* time?  If it's local time, 
> that's a bit more work; I'll assume it's UTC here.
>
> Values for FT_ABSOLUTE_TIME fields are nstime_t's; those are structures with a "secs" and "nsecs" field.  If you have 
> a 64-bit milliseconds since the Epoch, and you want to convert it to an nstime_t for use with an FT_ABSOLUTE_TIME 
> field, you'd do
>
>       guint64 msecs_since_the_epoch;
>       nstime_t t;
>
>               ...
>
>       t.secs = msecs_since_the_epoch/1000;
>       t.nsecs = (msecs_since_the_epoch%1000)*1000000; /* milliseconds to nanoseconds */
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