81 lines
2.0 KiB
Lua
81 lines
2.0 KiB
Lua
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-- I count the buffer space needed for LLC PDUs in the worse case and print it
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do
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local function init_listener()
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-- handle the port as NS over IP
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local udp_port_table = DissectorTable.get("udp.port")
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local gprs_ns_dis = Dissector.get("gprs_ns")
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udp_port_table:add(23000,gprs_ns_dis)
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-- bssgp filters
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local bssgp_pdu_get = Field.new("bssgp.pdu_type")
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local bssgp_delay_get = Field.new("bssgp.delay_val")
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local llcgprs_get = Field.new("llcgprs")
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local pdus = nil
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print("START...")
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local tap = Listener.new("ip", "udp.port == 23000 && bssgp.pdu_type == 0")
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function tap.packet(pinfo,tvb,ip)
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local pdu = bssgp_pdu_get()
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local len = llcgprs_get().len
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local delay = bssgp_delay_get()
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-- only handle bssgp, but we also want the IP frame
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if not pdu then
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return
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end
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if tonumber(tostring(delay)) == 65535 then
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pdus = { next = pdus,
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len = len,
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expires = -1 }
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else
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local off = tonumber(tostring(delay)) / 100.0
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pdus = { next = pdus,
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len = len,
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expires = pinfo.rel_ts + off }
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end
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local now_time = tonumber(tostring(pinfo.rel_ts))
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local now_size = 0
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local l = pdus
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local prev = nil
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local count = 0
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while l do
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if now_time < l.expires or l.expires == -1 then
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now_size = now_size + l.len
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prev = l
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l = l.next
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count = count + 1
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else
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-- delete things
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if prev == nil then
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pdus = nil
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l = nil
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else
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prev.next = l.next
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l = l.next
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end
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end
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end
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-- print("TOTAL: " .. now_time .. " PDU_SIZE: " .. now_size)
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print(now_time .. " " .. now_size / 1024.0 .. " " .. count)
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-- print("NOW: " .. tostring(pinfo.rel_ts) .. " Delay: " .. tostring(delay) .. " Length: " .. tostring(len))
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end
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function tap.draw()
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-- well... this will not be called...
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-- for ip,bssgp_histo in pairs(dumpers) do
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-- print("IP " .. ip)
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-- end
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print("END")
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end
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function tap.reset()
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-- well... this will not be called...
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end
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end
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init_listener()
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end
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