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Make the protocol dissector heuristic (#14335)
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1d9c9710d7
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@ -1280,13 +1280,14 @@ do
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function p_minetest.dissector(buffer, pinfo, tree)
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function p_minetest.dissector(buffer, pinfo, tree)
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-- Add Minetest tree item and verify the ID
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-- Defer if payload doesn't have Minetest's magic number
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if buffer(0,4):uint() ~= minetest_id then
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return false
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end
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-- Add Minetest tree item
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local t = tree:add(p_minetest, buffer(0,8))
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local t = tree:add(p_minetest, buffer(0,8))
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t:add(f_id, buffer(0,4))
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t:add(f_id, buffer(0,4))
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if buffer(0,4):uint() ~= minetest_id then
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t:add_expert_info(PI_UNDECODED, PI_WARN, "Invalid ID, this is not a Minetest packet")
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return
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end
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-- ID is valid, so replace packet's shown protocol
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-- ID is valid, so replace packet's shown protocol
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pinfo.cols.protocol = "Minetest"
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pinfo.cols.protocol = "Minetest"
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@ -1339,12 +1340,11 @@ do
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end
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end
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pinfo.cols.info:append(" (" .. reliability_info .. ")")
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pinfo.cols.info:append(" (" .. reliability_info .. ")")
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return true
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end
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end
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-- FIXME Is there a way to let the dissector table check if the first payload bytes are 0x4f457403?
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p_minetest:register_heuristic("udp", p_minetest.dissector)
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DissectorTable.get("udp.port"):add(30000, p_minetest)
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DissectorTable.get("udp.port"):add(30001, p_minetest)
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end
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end
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