Ano-sys
58 lines
2.2 KiB
Lua
58 lines
2.2 KiB
Lua
rn_protocol = Proto("RN", "Computer Networks Chord Protocol")
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-- Header fields
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flags_f = ProtoField.uint8("rn_protocol.flags", "flags", base.HEX)
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hash_f = ProtoField.uint16("rn_protocol.hash", "hash", base.HEX)
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id_f = ProtoField.uint16("rn_protocol.id", "id", base.HEX)
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ip_f = ProtoField.ipv4("rn_protocol.ip", "ip")
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port_f = ProtoField.uint16("rn_protocol.port", "port", base.DEC)
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rn_protocol.fields = {flags_f, hash_f, id_f, ip_f, port_f}
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op_names = {
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[0] = "Lookup",
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[1] = "Reply",
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[2] = "Stabilize",
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[3] = "Notify",
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[4] = "Join",
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}
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function info_text(buffer, pinfo)
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local name = op_names[buffer(0, 1):uint()]
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local desc = ""
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if name == "Lookup" then
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desc = string.format(" %x for %x@%s:%u", buffer(1, 2):uint(), buffer(3, 2):uint(), buffer(5, 4):uint(), buffer(9, 2):uint())
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elseif name == "Reply" then
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elseif name == "Stabilize" then
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desc = string.format(" from 0x%02x@%s:%u", buffer(3, 2):uint(), buffer(5, 4):ipv4(), buffer(9, 2):uint())
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elseif name == "Notify" then
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desc = string.format(" of 0x%02x@%s:%u", buffer(3, 2):uint(), buffer(5, 4):ipv4(), buffer(9, 2):uint())
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elseif name == "Join" then
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desc = string.format(" from 0x%02x@%s:%u", buffer(3, 2):uint(), buffer(5, 4):ipv4(), buffer(9, 2):uint())
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end
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local suffix = string.format(" (%s:%u → %s:%u)", pinfo.src, pinfo.src_port, pinfo.dst, pinfo.dst_port)
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return name .. desc .. suffix
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end
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function rn_protocol.dissector(buffer, pinfo, tree)
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length = buffer:len()
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if length ~= 11 then
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return 0
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end
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local subtree = tree:add(rn_protocol, buffer(), rn_protocol.description)
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pinfo.cols.protocol = rn_protocol.name
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pinfo.cols.info = info_text(buffer, pinfo) -- string.format("%s: (%s:%u → %s:%u)", op_names[buffer(0, 1):uint()], pinfo.src, pinfo.src_port, pinfo.dst, pinfo.dst_port)
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subtree:add(flags_f, buffer(0, 1)):append_text(" (" .. op_names[buffer(0, 1):uint()] .. ")")
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subtree:add(hash_f, buffer(1, 2))
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subtree:add(id_f, buffer(3, 2))
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subtree:add(ip_f, buffer(5, 4))
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subtree:add(port_f, buffer(9, 2))
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return 11
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end
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rn_protocol:register_heuristic("udp", rn_protocol.dissector)
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