Re: Length of txt records

In <000901c4585e$4af4bde0$01030101(_at_)pamho(_dot_)net> "Roger Moser" 
<roger_moser_spf(_at_)greenmail(_dot_)ch> writes:

> Hector Santos wrote:
> >   int j  = 0;
> >   for (int i = 0; i < RR.RDlength; i++) {
> >       int ch = RRBuffer[position+i];
> >       if ((ch > 127) || (ch < 32)) {
> >          continue;
> >       }
> >       // 255 mod check
> >       if ((i == 0) || ((i % 255) != 0)) {
> >           rec.szTXT[j] = ch;
> >           j++;
> >       }
> >   }
> This routine is incorrect because it assumes that all substrings have 255
> characters which is not always the case.
Yep.  It is perfectly valid to have a TXT record such as:

@       TXT     "v=spf1 " "a " "mx " "include:foo.com " "-all"

This creates 5 substrings.


> Correct is (no guarantee):
Well the other problem that I see is throwing out invalid characters.
You should not be able to take TXT record filled with random garbage,
filter out all the "invalid" stuff and end up with a "valid" SPF
record.


-wayne