Initial push

2024-12-30 02:06:40 +01:00
commit 817ba850fb
63 changed files with 6775 additions and 0 deletions
@@ -0,0 +1,57 @@
+rn_protocol = Proto("RN", "Computer Networks Chord Protocol")
+
+-- Header fields
+flags_f = ProtoField.uint8("rn_protocol.flags", "flags", base.HEX)
+hash_f = ProtoField.uint16("rn_protocol.hash", "hash", base.HEX)
+id_f = ProtoField.uint16("rn_protocol.id", "id", base.HEX)
+ip_f = ProtoField.ipv4("rn_protocol.ip", "ip")
+port_f = ProtoField.uint16("rn_protocol.port", "port", base.DEC)
+
+rn_protocol.fields = {flags_f, hash_f, id_f, ip_f, port_f}
+
+op_names = {
+    [0] = "Lookup",
+    [1] = "Reply",
+    [2] = "Stabilize",
+    [3] = "Notify",
+    [4] = "Join",
+}
+
+function info_text(buffer, pinfo)
+    local name = op_names[buffer(0, 1):uint()]
+    local desc = ""
+    if name == "Lookup" then
+        desc = string.format(" %x for %x@%s:%u", buffer(1, 2):uint(), buffer(3, 2):uint(), buffer(5, 4):uint(), buffer(9, 2):uint())
+    elseif name == "Reply" then
+    elseif name == "Stabilize" then
+        desc = string.format(" from 0x%02x@%s:%u", buffer(3, 2):uint(), buffer(5, 4):ipv4(), buffer(9, 2):uint())
+    elseif name == "Notify" then
+        desc = string.format(" of 0x%02x@%s:%u", buffer(3, 2):uint(), buffer(5, 4):ipv4(), buffer(9, 2):uint())
+    elseif name == "Join" then
+        desc = string.format(" from 0x%02x@%s:%u", buffer(3, 2):uint(), buffer(5, 4):ipv4(), buffer(9, 2):uint())
+    end
+    local suffix = string.format(" (%s:%u → %s:%u)", pinfo.src, pinfo.src_port, pinfo.dst, pinfo.dst_port)
+    return name .. desc .. suffix
+end
+
+function rn_protocol.dissector(buffer, pinfo, tree)
+    length = buffer:len()
+
+    if length ~= 11 then
+        return 0
+    end
+
+    local subtree = tree:add(rn_protocol, buffer(), rn_protocol.description)
+    pinfo.cols.protocol = rn_protocol.name
+    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)
+
+    subtree:add(flags_f, buffer(0, 1)):append_text(" (" .. op_names[buffer(0, 1):uint()] .. ")")
+    subtree:add(hash_f, buffer(1, 2))
+    subtree:add(id_f, buffer(3, 2))
+    subtree:add(ip_f, buffer(5, 4))
+    subtree:add(port_f, buffer(9, 2))
+
+    return 11
+end
+
+rn_protocol:register_heuristic("udp", rn_protocol.dissector)