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Update wireshark-sbn.lua #52

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Update wireshark-sbn.lua #52

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20 changes: 18 additions & 2 deletions wireshark-sbn.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,8 @@ local proto_sbn_type =

local proto_sbn_cpuid = ProtoField.uint32("cfs_sbn.CPUID", "CPUID", base.DEC)

local proto_sbn_spacecraftid = ProtoField.uint32("cfs_sbn.SPACECRAFTID", "SPACECRAFTID", base.HEX)

local proto_sbn_version =
ProtoField.string("cfs_sbn.sub.Version", "Version", base.ASCII)

Expand All @@ -39,6 +41,7 @@ proto_sbn.fields = {
proto_sbn_msgsz,
proto_sbn_type,
proto_sbn_cpuid,
proto_sbn_spacecraftid,
proto_sbn_sub,
proto_sbn_version,
proto_sbn_sub_cnt,
Expand All @@ -52,28 +55,41 @@ function proto_sbn.dissector(buffer, pinfo, tree)
local subtree = tree:add(proto_sbn, buffer(), "SBN Data")
local offset = 0

-- Size (2 B)
subtree:add(proto_sbn_msgsz, buffer(offset, 2))
offset = offset + 2

-- Type (1 B)
subtree:add(proto_sbn_type, buffer(offset, 1))
local msgtype = buffer(offset, 1):uint()
offset = offset + 1

subtree:add(proto_sbn_cpuid, buffer(3, 4))
-- CPUID (4 B)
subtree:add(proto_sbn_cpuid, buffer(offset, 4))
offset = offset + 4

-- SpacecraftID (4 B)
subtree:add(proto_sbn_spacecraftid, buffer(offset, 4))
offset = offset + 4

if msgtype == 1 then -- sub
-- Version (48 B)
subtree:add(proto_sbn_version, buffer(offset, 48))
offset = offset + 48
end

if msgtype == 1 or msgtype == 2 then -- sub/unsub
-- Count (2 B)
subtree:add(proto_sbn_sub_cnt, buffer(offset, 2))
local sub_cnt = buffer(offset, 2):uint()
offset = offset + 2

for i = 0, sub_cnt - 1, 1 do
subtree:add(proto_sbn_sub_mid, buffer(offset, 2))
-- MID (4 B)
subtree:add(proto_sbn_sub_mid, buffer(offset, 4))
offset = offset + 4

-- QOS (2 B) - ignored
offset = offset + 2
end
end
Expand Down