>...except M_LEADINGSPACE() was already making a (broken) read-only check...
>it was checking M_EXT, and if that was set, was assuming the buffer was
>read-only.  M_TRAILINGSPACE() was not making this check, assuming that the
>buffer was always writable.
>
>Seems like making M_LEADINGSPACE() and M_TRAILINGSPACE() perform these checks
>is better, esp. considering the "duplicate this traffic" filter example you
>cite.

	i see.  thanks for clarification.

itojun