Comment # 21
on bug 8382
from Evan Huus
Ugh, this is getting messy. Stepping back for a moment, I think the following
is what *should* be; if we agree on this then we can start identifying places
where we don't do what we should:
- tvb_get_string_* functions should preserve embedded nulls, as they should be
just dumb getters from the tvb
- tvb_get_string_* functions should provide the length of the returned string,
since with multi-byte characters and embedded nulls, the caller has no other
way of determining this value
- the ms-mms dissector should be checking for overflow when doubling a value it
gets from the packet
- the ms-mms dissector should be using proto_tree_add_unicode_string for
strings it gets via tvb_get_ephemeral_unicode_string
- it should be possible to add multibyte unicode strings (UCS-2, UTF-16, UCS-4,
etc) to the tree with proto_tree_add_item and the appropriate encoding
arguments
- calling format_str is necessary when passing a packet-derived string into
proto_tree_add_string, col_append_fstr and friends. These functions could
potentially call format_str themselves on every string they get, but the
performance hit would be big. Faster to continue calling it only where needed.
Can you think of anything else?
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