Wireshark-bugs: [Wireshark-bugs] [Bug 9369] New: What hf types really conflict (don't allow 2 hf

Date: Fri, 01 Nov 2013 20:28:29 +0000
Bug ID 9369
Summary What hf types really conflict (don't allow 2 hf's with the same abbreviation)?
Classification Unclassified
Product Wireshark
Version SVN
Hardware All
OS All
Status UNCONFIRMED
Severity Major
Priority Low
Component Dissection engine (libwireshark)
Assignee [email protected]
Reporter [email protected]
CC [email protected], [email protected], [email protected]
Depends on 9360

Build Information:
SVN
--
+++ This bug was initially created as a clone of Bug #9360 +++

Bug 9360's complaint was that a FT_UINT16 and FT_STRING could not share the
same abbreviation:

~~~
The irc.response.command field is both a 16-bit integer and string. This breaks
the filtering engine:

$ dftest 'irc.response.command_parameter and not irc.response.command ==
"PONG"'
Filter: "irc.response.command_parameter and not irc.response.command == "PONG""
dftest: "PONG" cannot be converted to Unsigned integer, 2 bytes.

tshark lists only one field, of type string:
$ tshark -G fields | grep -F irc.response.command -w
F       Command irc.response.command    FT_STRING       irc             0x0    
Response command

[...]

It looks like that behavior is only valid for numeric types, not different
types such as strings and numbers?
~~~

But I also had experience that said that an int-type and a string did not
conflict, at least if the int-type had a value_string which allows the DF code
to try to convert the string back to an int.  The comments I had in checkAPIs
also indicated the int-types were also compatible with booleans.

There's probably some more research to be done here.


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