Add input parameter to tshark/sharkd

edit

Thank you for your answer

1. So i don't need to add code in the tshark.c?
2. How do i refer to it in the dissector code?
3. The preference i want to add is general, not specific to a special decoder.

My new question is how do i add a parameter that is available by all dissectors ? I want to pass tshark -o "new_parameter_name: TRUE"
without the dissector so it can be used by different dissector, it is relevant to different dissector

a parameter that is available by all dissectors ?

I.e., this parameter will be relevant to every single dissector in Wireshark, and every single dissector that will ever be added to Wireshark? Or is it just relevant to a small set of dissectors?

Multiple not all dissectord. But I want user to set only one parameter in preference. And not to set multiple parameter.

What are the dissectors? Perhaps the best way to do it is to have a preference for one dissector and have other dissectors look at it.

Ok how can I look at other dissector preference ? And is there a dissector name that is general (like application or general)? I want all dissector that look at sms messages

And is there a dissector name that is general (like application or general)? I want all dissector that look at sms messages

Then you don't want a general preference, you want an SMS preference. Currently, there's no "SMS" dissector for all network types, but presumably there's something they all have in common if there could be a single preference to control them all. What would this preference do?

i would like to change the sms text to zero in the save as option in thsark.
1. So which preference should i use?
2. How do i read preference from another dissector?

What do you mean by "change the SMS text to zero in the save as option in TShark"?

Thank you very much for your help
This is not my question, my question is which preference should i use

I cannot make a good suggestion as to how to define the preference without understanding, in complete detail, what the preference is supposed to do.

The purpose of the feature is to mask the bytes of the sms text. I need to have as output a pcap with sms masked ( 0 instead of text).

So, in the text output of TShark, such as you get with the "-V" flag, you want the text of an SMS message "censored"?

Or do you mean that you want TShark to be able to write binary capture files with the text of the message replaced by zeroed bytes?

i want to have a new pcap with sms censored. I don't want to have text output