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update LUA dissector ( for tcp and udp dump)

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still not complete, but helps a lot
This commit is contained in:
Arturo Hernandez 2018-04-26 16:40:57 -04:00
parent a710842f6e
commit 26d75abd92
1 changed files with 192 additions and 14 deletions
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204
zk6.lua
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@ -123,6 +123,17 @@ assert(ProtoExpert.new, "Wireshark does not have the ProtoExpert class, so it's
----------------------------------------
-- creates a Proto object, but doesn't register it yet
local zk = Proto("zk6","ZK600 UDP Protocol")
local zk_tcp = Proto("zk8","ZK800 TCP Protocol")
local rfct = {
[1] = "FCT_ATTLOG",
[8] = "FCT_WORKCODE",
[2] = "FCT_FINGERTMP",
[4] = "FCT_OPLOG",
[5] = "FCT_USER",
[6] = "FCT_SMS",
[7] = "FCT_UDATA"
}
local rcomands = {
[7] = "CMD_DB_RRQ",
@ -191,6 +202,8 @@ local rcomands = {
[1500] = "CMD_PREPARE_DATA",
[1501] = "CMD_DATA",
[1502] = "CMD_FREE_DATA",
[1503] = "CMD_PREPARE_BUFFER",
[1504] = "CMD_READ_BUFFER",
[2000] = "CMD_ACK_OK",
[2001] = "CMD_ACK_ERROR",
[2002] = "CMD_ACK_DATA",
@ -202,20 +215,67 @@ local rcomands = {
[65532] = "CMD_ACK_ERROR_INIT",
[65531] = "CMD_ACK_ERROR_DATA"
}
local rmachines = {
[20560] = "MACHINE_PREPARE_DATA_1",
[32130] = "MACHINE_PREPARE_DATA_2"
}
----------------------------------------
local pf_machine1 = ProtoField.new ("Machine Data 1", "zk8.machine1", ftypes.UINT16, rmachines, base.DEC)
local pf_machine2 = ProtoField.new ("Machine Data 2", "zk8.machine2", ftypes.UINT16, rmachines, base.DEC)
local pf_length = ProtoField.new ("Length", "zk8.length", ftypes.UINT32, nil, base.DEC)
local pf_command = ProtoField.new ("Command", "zk6.command", ftypes.UINT16, rcomands, base.DEC)
local pf_checksum = ProtoField.new ("CheckSum", "zk6.checksum", ftypes.UINT16, nil, base.HEX)
local pf_sesion_id = ProtoField.uint16("zk6.session_id", "ID session", base.HEX)
local pf_reply_id = ProtoField.uint16("zk6.reply_id", "ID Reply")
local pf_commkey = ProtoField.new ("Communication key", "zk6.commkey", ftypes.UINT32, nil, base.HEX)
local pf_data = ProtoField.new ("Data", "zk6.data", ftypes.BYTES, nil, base.DOT)
local pf_string = ProtoField.new ("Data", "zk6.string", ftypes.STRING)
local pf_time = ProtoField.new ("Time", "zk6.time", ftypes.UINT32, nil)
local pf_start = ProtoField.new ("Data offset", "zk6.start", ftypes.UINT32, nil)
local pf_size = ProtoField.new ("Data Size", "zk6.size", ftypes.UINT32, nil)
local pf_psize = ProtoField.new ("Packet Size", "zk6.psize", ftypes.UINT32, nil)
local pf_fsize0 = ProtoField.new ("null #1", "zk6.fsize0", ftypes.UINT32, nil)
local pf_fsize1 = ProtoField.new ("null #2", "zk6.fsize1", ftypes.UINT32, nil)
local pf_fsize2 = ProtoField.new ("null #3", "zk6.fsize2", ftypes.UINT32, nil)
local pf_fsize3 = ProtoField.new ("null #4", "zk6.fsize3", ftypes.UINT32, nil)
local pf_fsizeu = ProtoField.new ("users", "zk6.fsizeu", ftypes.UINT32, nil)
local pf_fsize4 = ProtoField.new ("null #5", "zk6.fsize4", ftypes.UINT32, nil)
local pf_fsizef = ProtoField.new ("fingers", "zk6.fsizef", ftypes.UINT32, nil)
local pf_fsize5 = ProtoField.new ("null #6", "zk6.fsize5", ftypes.UINT32, nil)
local pf_fsizer = ProtoField.new ("records", "zk6.fsizer", ftypes.UINT32, nil)
local pf_fsize6 = ProtoField.new ("null #7", "zk6.fsize6", ftypes.UINT32, nil)
local pf_fsize7 = ProtoField.new ("null 4096", "zk6.fsize7", ftypes.UINT32, nil)
local pf_fsize8 = ProtoField.new ("null #8", "zk6.fsize8", ftypes.UINT32, nil)
local pf_fsizec = ProtoField.new ("cards", "zk6.fsizec", ftypes.UINT32, nil)
local pf_fsize9 = ProtoField.new ("null #9", "zk6.fsize9", ftypes.UINT32, nil)
local pf_fsizefc = ProtoField.new ("finger capacity", "zk6.fsizefc", ftypes.UINT32, nil)
local pf_fsizeuc = ProtoField.new ("user capacity", "zk6.fsizeuc", ftypes.UINT32, nil)
local pf_fsizerc = ProtoField.new ("record capacity", "zk6.fsizerc", ftypes.UINT32, nil)
local pf_fsizefa = ProtoField.new ("finger available", "zk6.fsizefa", ftypes.UINT32, nil)
local pf_fsizeua = ProtoField.new ("user available", "zk6.fsizeua", ftypes.UINT32, nil)
local pf_fsizera = ProtoField.new ("record available", "zk6.fsizera", ftypes.UINT32, nil)
local pf_fsizeff = ProtoField.new ("face", "zk6.fsizerff", ftypes.UINT32, nil)
local pf_fsize10 = ProtoField.new ("nul #10", "zk6.fsize10", ftypes.UINT32, nil)
local pf_fsizeffc = ProtoField.new ("face capacity", "zk6.fsizeffc", ftypes.UINT32, nil)
local pf_pbfill = ProtoField.new ("null 01", "zk6.pbfill", ftypes.UINT8, nil)
local pf_pbcmd = ProtoField.new ("command", "zk6.pbcmd", ftypes.UINT16, rcomands)
local pf_pbarg = ProtoField.new ("argument", "zk6.pbarg", ftypes.UINT64, rfct)
local pf_pbfill0 = ProtoField.new ("null 0", "zk6.pbfill0", ftypes.UINT8, nil)
local pf_pbfree = ProtoField.new ("free space", "zk6.pbfree", ftypes.UINT32, nil)
local pf_uid = ProtoField.new ("User ID", "zk6.uid", ftypes.UINT16, nil)
----------------------------------------
-- this actually registers the ProtoFields above, into our new Protocol
-- in a real script I wouldn't do it this way; I'd build a table of fields programmatically
-- and then set dns.fields to it, so as to avoid forgetting a field
zk.fields = { pf_command, pf_checksum, pf_sesion_id, pf_reply_id, pf_data, pf_time}
zk.fields = { pf_command, pf_checksum, pf_sesion_id, pf_reply_id, pf_commkey, pf_data, pf_string,
pf_time, pf_start, pf_size, pf_psize, pf_fsize0, pf_fsize1, pf_fsize2, pf_fsize3,
pf_fsizeu, pf_fsize4, pf_fsizef, pf_fsize5,pf_fsizer,pf_fsize6,pf_fsize7,
pf_fsize8,pf_fsizec,pf_fsize9,pf_fsizefc,pf_fsizeuc,pf_fsizerc, pf_uid,
pf_fsizefa,pf_fsizeua,pf_fsizera, pf_fsizeff, pf_fsize10, pf_fsizeffc,
pf_pbfill, pf_pbcmd, pf_pbarg, pf_pbfill0, pf_pbfree}
zk_tcp.fields = { pf_machine1, pf_machine2, pf_length }
----------------------------------------
-- we don't just want to display our protocol's fields, we want to access the value of some of them too!
-- There are several ways to do that. One is to just parse the buffer contents in Lua code to find
@ -226,12 +286,41 @@ zk.fields = { pf_command, pf_checksum, pf_sesion_id, pf_reply_id, pf_data, pf_ti
-- referencing fields we're creating, and they're not "created" until that line above.
-- Furthermore, you cannot put these 'Field.new()' lines inside the dissector function.
-- Before Wireshark version 1.11, you couldn't even do this concept (of using fields you just created).
local command_field = Field.new("zk6.command")
local checksum_field = Field.new("zk6.checksum")
local session_id_field = Field.new("zk6.session_id")
local reply_id_field = Field.new("zk6.reply_id")
local data_field = Field.new("zk6.data")
local time_field =Field.new("zk6.time")
local machine1_field = Field.new("zk8.machine1")
local machine2_field = Field.new("zk8.machine2")
local length_field = Field.new("zk8.length")
local command_field = Field.new("zk6.command")
local checksum_field = Field.new("zk6.checksum")
local session_id_field = Field.new("zk6.session_id")
local reply_id_field = Field.new("zk6.reply_id")
local commkey_field = Field.new("zk6.commkey")
local data_field = Field.new("zk6.data")
local string_field = Field.new("zk6.string")
local time_field = Field.new("zk6.time")
local size_field = Field.new("zk6.size")
local start_field = Field.new("zk6.start")
local psize_field = Field.new("zk6.psize")
local fsize0_field = Field.new("zk6.fsize0")
local fsize1_field = Field.new("zk6.fsize1")
local fsize2_field = Field.new("zk6.fsize2")
local fsize3_field = Field.new("zk6.fsize3")
local fsize4_field = Field.new("zk6.fsize4")
local fsize5_field = Field.new("zk6.fsize5")
local fsize6_field = Field.new("zk6.fsize6")
local fsize7_field = Field.new("zk6.fsize7")
local fsize8_field = Field.new("zk6.fsize8")
local fsize9_field = Field.new("zk6.fsize9")
local fsizef_field = Field.new("zk6.fsizef")
local fsizeu_field = Field.new("zk6.fsizeu")
local fsizer_field = Field.new("zk6.fsizer")
local fsizec_field = Field.new("zk6.fsizec")
local pbfill_field = Field.new("zk6.pbfill")
local pbcmd_field = Field.new("zk6.pbcmd")
local pbarg_field = Field.new("zk6.pbarg")
local pbfill0_field = Field.new("zk6.pbfill0")
local pbfree_field = Field.new("zk6.pbfree")
local uid_field = Field.new("zk6.uid")
-- here's a little helper function to access the response_field value later.
-- Like any Field retrieval, you can't retrieve a field's value until its value has been
-- set, which won't happen until we actually use our ProtoFields in TreeItem:add() calls.
@ -325,7 +414,7 @@ local prevCommand = 0
-- The 'tvbuf' is a Tvb object, 'pktinfo' is a Pinfo object, and 'root' is a TreeItem object.
-- Whenever Wireshark dissects a packet that our Proto is hooked into, it will call
-- this function and pass it these arguments for the packet it's dissecting.
function zk.dissector(tvbuf,pktinfo,root)
function zk.dissector(tvbuf, pktinfo, root)
dprint2("zk.dissector called")
-- set the protocol column to show our protocol name
@ -360,27 +449,116 @@ function zk.dissector(tvbuf,pktinfo,root)
tree:add_le(pf_checksum, tvbuf:range(2,2))
tree:add_le(pf_sesion_id, tvbuf:range(4,2))
tree:add_le(pf_reply_id, tvbuf:range(6,2))
local command = tvbuf:range(0,2):le_uint()
if pktlen > ZK_HDR_LEN then
remain = pktlen - ZK_HDR_LEN -- TODO: no funciona el prevCommand,
if (prevCommand == 201) or (prevCommand == 202) then
if (command == 1102) then
tree:add_le(pf_commkey, tvbuf:range(8,4))
elseif (command == 1500) then
tree:add_le(pf_size, tvbuf:range(8,4))
if remain > 8 then
tree:add_le(pf_psize, tvbuf:range(12,4))
end
elseif (command == 12) or (command == 11) then
tree:add(pf_string, tvbuf:range(8,remain))
elseif (command == 18) then
tree:add_le(pf_uid, tvbuf(8,2))
elseif (command == 1503) then
tree:add(pf_pbfill, tvbuf:range(8,1))
tree:add_le(pf_pbcmd, tvbuf:range(9,2))
tree:add_le(pf_pbarg, tvbuf:range(11,8))
elseif (command == 1504) then
tree:add_le(pf_start, tvbuf:range(8,4))
tree:add_le(pf_size, tvbuf:range(12,4))
elseif (prevCommand == 1503) then
tree:add_le(pf_pbfill0, tvbuf:range(8,1))
tree:add_le(pf_size, tvbuf:range(9,4))
tree:add_le(pf_psize, tvbuf:range(13,4))
tree:add_le(pf_pbfree, tvbuf:range(17,4))
elseif (prevCommand == 12) or (prevCommand == 11) or (prevCommand == 1100) then
tree:add(pf_string, tvbuf:range(8,remain))
elseif (prevCommand == 201) or (prevCommand == 202) then
local ts = tvbuf:range(8,4):le_uint()
tree:add_le(pf_time, tvbuf:range(8,4))
elseif (prevCommand == 50) then
tree:add_le(pf_fsize0, tvbuf:range(8,4))
tree:add_le(pf_fsize1, tvbuf:range(12,4))
tree:add_le(pf_fsize2, tvbuf:range(16,4))
tree:add_le(pf_fsize3, tvbuf:range(20,4))
tree:add_le(pf_fsizeu, tvbuf:range(24,4))
tree:add_le(pf_fsize4, tvbuf:range(28,4))
tree:add_le(pf_fsizef, tvbuf:range(32,4))
tree:add_le(pf_fsize5, tvbuf:range(36,4))
tree:add_le(pf_fsizer, tvbuf:range(40,4))
tree:add_le(pf_fsize6, tvbuf:range(44,4))
tree:add_le(pf_fsize7, tvbuf:range(48,4))
tree:add_le(pf_fsize8, tvbuf:range(52,4))
tree:add_le(pf_fsizec, tvbuf:range(56,4))
tree:add_le(pf_fsize9, tvbuf:range(60,4))
tree:add_le(pf_fsizefc, tvbuf:range(64,4))
tree:add_le(pf_fsizeuc, tvbuf:range(68,4))
tree:add_le(pf_fsizerc, tvbuf:range(72,4))
tree:add_le(pf_fsizefa, tvbuf:range(76,4))
tree:add_le(pf_fsizeua, tvbuf:range(80,4))
tree:add_le(pf_fsizera, tvbuf:range(84,4))
if remain > 80 then
tree:add_le(pf_fsizeff, tvbuf:range(88,4))
tree:add_le(pf_fsize10, tvbuf:range(92,4))
tree:add_le(pf_fsizeffc, tvbuf:range(96,4))
end
else
tree:add_le(pf_data, tvbuf:range(8,remain))
-- tree:add_le(pf_data, tvbuf:range(8,remain)) most time we need strings
tree:add(pf_string, tvbuf:range(8,remain))
end
end
dprint2("zk.dissector returning",pktlen)
prevCommand = tvbuf:range(0,2):le_uint()
prevCommand = command
-- tell wireshark how much of tvbuff we dissected
return pktlen
end
----------------------------------------
-- we want to have our protocol dissection invoked for a specific UDP port,
-- so get the udp dissector table and add our protocol to it
DissectorTable.get("udp.port"):add(default_settings.port, zk)
function zk_tcp.dissector(tvbuf, pktinfo, root)
dprint2("zk_tcp.dissector called")
local pktlen = tvbuf:reported_length_remaining()
-- We start by adding our protocol to the dissection display tree.
-- A call to tree:add() returns the child created, so we can add more "under" it using that return value.
-- The second argument is how much of the buffer/packet this added tree item covers/represents - in this
-- case (DNS protocol) that's the remainder of the packet.
local tree = root:add(zk_tcp, tvbuf:range(0,pktlen))
-- now let's check it's not too short
if pktlen < ZK_HDR_LEN then
-- since we're going to add this protocol to a specific UDP port, we're going to
-- assume packets in this port are our protocol, so the packet being too short is an error
-- the old way: tree:add_expert_info(PI_MALFORMED, PI_ERROR, "packet too short")
-- the correct way now:
tree:add_proto_expert_info(ef_too_short)
dprint("packet length",pktlen,"too short")
return
end
dprint2("zk_tcp.dissector returning", pktlen)
tree:add_le(pf_machine1, tvbuf:range(0,2))
tree:add_le(pf_machine2, tvbuf:range(2,2))
tree:add_le(pf_length, tvbuf:range(4,4))
-- tell wireshark how much of tvbuff we dissected
if pktlen > ZK_HDR_LEN then
remain = pktlen - ZK_HDR_LEN
-- zk_tree = tree:add(zk, tvbuf:range(8, remain))
zk.dissector(tvbuf:range(8,remain):tvb(), pktinfo, tree)
end
-- set the protocol column to show our protocol name
pktinfo.cols.protocol:set("ZK8")
return pktlen
end
DissectorTable.get("tcp.port"):add(default_settings.port, zk_tcp)
-- We're done!
-- our protocol (Proto) gets automatically registered after this script finishes loading
----------------------------------------