easylinux/cam-reverse
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add some more fields

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This commit is contained in:
David Ventura
2024-05-02 14:53:07 +02:00
parent 2ec4d603c6
commit 80e50560e6
1 changed files with 30 additions and 0 deletions
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dissector.lua
+30
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@@ -20,6 +20,12 @@ ilnk_proto.fields.auth_token = ProtoField.bytes("iLnkP2P.auth_token", "CMD aut
ilnk_proto.fields.cmd_payload = ProtoField.bytes("iLnkP2P.payload", "CMD Payload", base.DASH)
-- jpeg | audio | continuation type?
ilnk_proto.fields.data_payload = ProtoField.bytes("iLnkP2P.data_payload", "Data Payload", base.DASH)
ilnk_proto.fields.payload_type = ProtoField.string("iLnkP2P.payload_type", "Payload type")
ilnk_proto.fields.payload_subtype = ProtoField.string("iLnkP2P.payload_type", "Payload type")
ilnk_proto.fields.payload_len = ProtoField.uint32("iLnkP2P.payload_len", "Payload len")
ilnk_proto.fields.frame_no = ProtoField.uint32("iLnkP2P.frame_no", "Frame no")
-- audio
ilnk_proto.fields.audio_header = ProtoField.bytes("iLnkP2P.audio_header", "Audio Header")
ilnk_proto.fields.encrypted = ProtoField.bool("iLnkP2P.encrypted", "Encrypted")
ilnk_proto.fields.cmd_type = ProtoField.string("iLnkP2P.cmd_type", "Cmd Pkt Type")
@@ -137,7 +143,31 @@ function ilnk_proto.dissector(buffer, pinfo, tree)
subtree:add(ilnk_proto.fields.cmd_payload, payload_tvb:range(0, payload_len -4))
end
else
local payload_type
local payload_subtype
local payload_tvb = ByteArray.tvb(buffer(8, packet_length-8):bytes(), "Data Payload")
if payload_tvb:range(0, 4):uint() == 0xffd8ffdb then
payload_subtype = "new frame"
-- start of new frame
end
if payload_tvb:range(0, 4):uint() == 0x55aa15a8 then
payload_type = "audio"
subtree:add(ilnk_proto.fields.audio_header, buffer(8, 32))
subtree:add(ilnk_proto.fields.payload_len, buffer(24, 4), buffer(24, 4):le_uint())
subtree:add(ilnk_proto.fields.frame_no, buffer(20, 4), buffer(20, 4):le_uint())
if payload_tvb:range(4, 1):uint() == 0x06 then
payload_subtype = "audio data"
elseif payload_tvb:range(4, 1):uint() == 0x03 then
payload_subtype = "maybe audio metadata"
else
payload_subtype = "REALLY not sure audio data"
end
else
payload_type = "jpeg"
payload_subtype = "jpeg continuation"
end
subtree:add(ilnk_proto.fields.payload_type, buffer(8, 4), payload_type)
subtree:add(ilnk_proto.fields.payload_subtype, buffer(12, 1), payload_subtype)
subtree:add(ilnk_proto.fields.data_payload, payload_tvb:range(0, packet_length-8))
end
end