Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 11356] New: Wireshark Lua dissectors: both expand together

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Bug ID	11356
Summary	Wireshark Lua dissectors: both expand together
Product	Wireshark
Version	1.12.4
Hardware	x86
OS	Windows 7
Status	UNCONFIRMED
Severity	Trivial
Priority	Low
Component	Dissection engine (libwireshark)
Assignee	bugzilla-admin@wireshark.org
Reporter	jj24870@gmail.com

Build Information:
Version 1.12.4 (v1.12.4-0-gb4861da from master-1.12)

--
Example of two simple Wireshark Lua dissectors for chained protocols:

local proto1 = Proto("proto1","First Layer")
local page = ProtoField.uint16("proto1.page", "Page", base.HEX)
proto1.fields = {page}

function proto1.dissector(buffer, pinfo, tree)
    pinfo.cols.protocol = proto1.name;
    local ptree = tree:add(proto1,buffer(1,5))
    ptree:add(page, buffer(1,2))
    Dissector.get("proto2"):call(buffer(6, 4):tvb(),  pinfo, tree) 
end

local proto2 = Proto("proto2","Second Layer")
local len = ProtoField.uint8("proto2.len", "Payload Length")
proto2.fields = {len}

function proto2.dissector(buffer, pinfo, tree)
    pinfo.cols.protocol = proto2.name;
    local ptree = tree:add(proto2,buffer())
    ptree:add(len, buffer(1,2))
end

DissectorTable.get("tcp.port"):add(3456, proto1)

The dissectors do work and display protocols in a tree one after another. Now
if one of the protocols is expanded and another packet is selected, then both
proto1 and proto2 in a tree are expanded. The same with collapse.

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