move openbsc/* to repos root

This is the first step in creating this repository from the legacy openbsc.git.

Like all other Osmocom repositories, keep the autoconf and automake files in
the repository root. openbsc.git has been the sole exception, which ends now.

Change-Id: I9c6f2a448d9cb1cc088cf1cf6918b69d7e69b4e7

1 files changed, 80 insertions, 0 deletions

diff --git a/contrib/gprs/gprs-buffer-count.lua b/contrib/gprs/gprs-buffer-count.lua
new file mode 100644
index 000000000..ca8864ad1
--- /dev/null
+++ b/contrib/gprs/gprs-buffer-count.lua
@@ -0,0 +1,80 @@
+-- I count the buffer space needed for LLC PDUs in the worse case and print it
+
+do
+	local function init_listener()
+		-- handle the port as NS over IP
+		local udp_port_table = DissectorTable.get("udp.port")
+		local gprs_ns_dis = Dissector.get("gprs_ns")
+		udp_port_table:add(23000,gprs_ns_dis)
+
+		-- bssgp filters
+		local bssgp_pdu_get = Field.new("bssgp.pdu_type")
+		local bssgp_delay_get = Field.new("bssgp.delay_val")
+		local llcgprs_get = Field.new("llcgprs")
+		local pdus = nil
+
+		print("START...")
+
+		local tap = Listener.new("ip", "udp.port == 23000 && bssgp.pdu_type == 0")
+		function tap.packet(pinfo,tvb,ip)
+			local pdu = bssgp_pdu_get()
+			local len = llcgprs_get().len
+			local delay = bssgp_delay_get()
+
+			-- only handle bssgp, but we also want the IP frame
+			if not pdu then
+				return
+			end
+
+			if tonumber(tostring(delay)) == 65535 then
+				pdus = { next = pdus,
+					 len = len,
+					 expires = -1 }
+			else
+				local off = tonumber(tostring(delay)) / 100.0
+				pdus = { next = pdus,
+					 len = len,
+					 expires = pinfo.rel_ts + off }
+			end
+			local now_time = tonumber(tostring(pinfo.rel_ts))
+			local now_size = 0
+			local l = pdus
+			local prev = nil
+			local count = 0
+			while l do
+				if now_time < l.expires or l.expires == -1 then
+					now_size = now_size + l.len
+					prev = l
+					l = l.next
+					count = count + 1
+				else
+					-- delete things
+					if prev == nil then
+						pdus = nil
+						l = nil
+					else
+						prev.next = l.next
+						l = l.next
+					end
+				end
+			end
+--			print("TOTAL: " .. now_time .. " PDU_SIZE: " .. now_size)
+			print(now_time .. " " .. now_size / 1024.0 .. " " .. count)
+--			print("NOW: " .. tostring(pinfo.rel_ts) .. " Delay: " .. tostring(delay) .. " Length: " .. tostring(len))
+		end
+
+		function tap.draw()
+			-- well... this will not be called...
+--			for ip,bssgp_histo in pairs(dumpers) do
+--				print("IP " .. ip)
+--			end
+			print("END")
+		end
+
+		function tap.reset()
+			-- well... this will not be called...
+		end
+	end
+
+	init_listener()
+end