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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Dear WG Members,</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>In my implementation, I am trying to thoroughly validate
each incoming Meta-AMS protocol message (MPDU). The primary goal is to
avoid program crashes that can occur when an attempt is made to access an array
element beyond the end of the array’s allocated memory. For
example, if the supplementary data includes a field that is supposed to be a
null-terminated character string, but the null-terminator is missing, avoid any
attempts to access past the end of the entire array allocated to hold the raw
MPDU bytes.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I’m finding it quite complex to validate MPDUs whose
supplementary data includes null-terminated strings (especially if the strings
are buried within arrays of structures containing sub-structures).
Validation would be much simpler if, instead of adding a one-byte null
terminator at the end of each string, we added a one-byte length field at the
beginning of each string. (It would also be possible to add the one-byte
length field and keep the null terminator, although that seems redundant).</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Any thoughts/comments?</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Tim</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
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