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Update Wireshark dissector

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This commit is contained in:
Clement 2018-07-20 18:29:48 -07:00
parent 87daa55f0b
commit db2297dbce
1 changed files with 7 additions and 49 deletions
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56
tools/dissectors/1-hfudt.lua
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@ -26,9 +26,6 @@ local f_hmac_hash = ProtoField.bytes("hfudt.hmac_hash", "HMAC Hash")
local f_control_type = ProtoField.uint16("hfudt.control_type", "Control Type", base.DEC)
local f_control_type_text = ProtoField.string("hfudt.control_type_text", "Control Type Text", base.ASCII)
local f_ack_sequence_number = ProtoField.uint32("hfudt.ack_sequence_number", "ACKed Sequence Number", base.DEC)
local f_control_sub_sequence = ProtoField.uint32("hfudt.control_sub_sequence", "Control Sub-Sequence Number", base.DEC)
local f_nak_sequence_number = ProtoField.uint32("hfudt.nak_sequence_number", "NAKed Sequence Number", base.DEC)
local f_nak_range_end = ProtoField.uint32("hfudt.nak_range_end", "NAK Range End", base.DEC)
local SEQUENCE_NUMBER_MASK = 0x07FFFFFF
@ -37,19 +34,13 @@ p_hfudt.fields = {
f_control_bit, f_reliable_bit, f_message_bit, f_sequence_number, f_type, f_type_text, f_version,
f_sender_id, f_hmac_hash,
f_message_position, f_message_number, f_message_part_number, f_obfuscation_level,
f_control_type, f_control_type_text, f_control_sub_sequence, f_ack_sequence_number, f_nak_sequence_number, f_nak_range_end,
f_data
f_control_type, f_control_type_text, f_ack_sequence_number, f_data
}
local control_types = {
[0] = { "ACK", "Acknowledgement" },
[1] = { "ACK2", "Acknowledgement of acknowledgement" },
[2] = { "LightACK", "Light Acknowledgement" },
[3] = { "NAK", "Loss report (NAK)" },
[4] = { "TimeoutNAK", "Loss report re-transmission (TimeoutNAK)" },
[5] = { "Handshake", "Handshake" },
[6] = { "HandshakeACK", "Acknowledgement of Handshake" },
[7] = { "ProbeTail", "Probe tail" },
[8] = { "HandshakeRequest", "Request a Handshake" }
}
@ -160,51 +151,18 @@ function p_hfudt.dissector(buf, pinfo, tree)
subtree:add(f_control_type_text, control_types[shifted_type][1])
end
if shifted_type == 0 or shifted_type == 1 then
if shifted_type == 0 then
local data_index = 4
-- this has a sub-sequence number
local second_word = buf(4, 4):le_uint()
subtree:add(f_control_sub_sequence, bit32.band(second_word, SEQUENCE_NUMBER_MASK))
local data_index = 8
if shifted_type == 0 then
-- if this is an ACK let's read out the sequence number
local sequence_number = buf(8, 4):le_uint()
subtree:add(f_ack_sequence_number, bit32.band(sequence_number, SEQUENCE_NUMBER_MASK))
data_index = data_index + 4
end
-- This is an ACK let's read out the sequence number
local sequence_number = buf(data_index, 4):le_uint()
subtree:add(f_ack_sequence_number, bit32.band(sequence_number, SEQUENCE_NUMBER_MASK))
data_index = data_index + 4
data_length = buf:len() - data_index
-- set the data from whatever is left in the packet
subtree:add(f_data, buf(data_index, data_length))
elseif shifted_type == 2 then
-- this is a Light ACK let's read out the sequence number
local sequence_number = buf(4, 4):le_uint()
subtree:add(f_ack_sequence_number, bit32.band(sequence_number, SEQUENCE_NUMBER_MASK))
data_length = buf:len() - 4
-- set the data from whatever is left in the packet
subtree:add(f_data, buf(4, data_length))
elseif shifted_type == 3 or shifted_type == 4 then
if buf:len() <= 12 then
-- this is a NAK pull the sequence number or range
local sequence_number = buf(4, 4):le_uint()
subtree:add(f_nak_sequence_number, bit32.band(sequence_number, SEQUENCE_NUMBER_MASK))
data_length = buf:len() - 4
if buf:len() > 8 then
local range_end = buf(8, 4):le_uint()
subtree:add(f_nak_range_end, bit32.band(range_end, SEQUENCE_NUMBER_MASK))
data_length = data_length - 4
end
end
else
data_length = buf:len() - 4