Rewrite video support so that it actually works. Add a janky NAL parser dissector.

LuaScripts/NALParser.lua

@@ -0,0 +1,62 @@
+-- H264 NAL Parser
+-- Version: 1.0
+-- Cameron Gutman
+
+-- NAL header
+local nal_start = ProtoField.bytes("nal.start", "H264 NAL Start Sequence") -- 4 Byte Start
+local nal_type = ProtoField.uint8("nal.type", "H264 NAL Type") -- 1 byte NAL type
+local nal_data = ProtoField.bytes("nal.data", "H264 NAL Data") -- variable byte NAL data
+
+p_h264raw = Proto("h264raw", "H264 Raw NAL Parser")
+p_h264raw.fields = {
+    nal_start,
+	nal_type,
+	nal_data
+    }
+
+function p_h264raw.dissector(buf, pkt, root)
+    pkt.cols.protocol = p_h264raw.name
+    subtree = root:add(p_h264raw, buf(0))
+
+	local i = 0
+	local data_start = -1
+    while i < buf:len do
+		-- Make sure we have a potential start sequence and type
+        if buf:len() - i < 5 then
+            -- We need more data
+            pkt.desegment_len = DESEGMENT_ONE_MORE_SEGMENT
+            pkt.desegment_offset = 0
+			return
+        end
+	
+		-- Check for start sequence
+		start = buf(i, 4):uint()
+		if start == 1 then
+			if data_start ~= -1 then
+				-- End the last NAL
+				subtree:add(nal_data, buf(data_start, i-data_start))
+			end
+			-- This is the start of a NAL
+			subtree:add(nal_start, buf(i, 4))
+			i = i + 4
+			-- Next byte is NAL type
+			subtree:add(nal_type, buf(i, 1), buf(i, 1):uint8())
+			i = i + 1
+			-- Data begins here
+			data_start = i
+		else
+			-- This must be a data byte
+			i = i + 1
+		end
+	end
+end
+
+function p_h264raw.init()
+end
+
+
+local udp_dissector_table = DissectorTable.get("rtp.pt")
+udp_dissector_table:add(96, p_h264raw)
+
+
+