mirror of https://github.com/OISF/suricata
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3 Commits (73ed780095deff40dd625412ac706337be54dc88)
Author | SHA1 | Message | Date |
---|---|---|---|
Victor Julien | 3a7d09edfc |
detect/frame: get data using stream callback
Inspect only data that has already been consumed by the app-layer parser. This allows for simpler progress tracking. |
3 years ago |
Victor Julien | 60bfade351 |
eve: implement frame logging
This is mostly to assist development and QA. It produces too much data for practical use. |
3 years ago |
Victor Julien | 1556e86c7d |
app/frames: initial support
The idea of stream frames is that the applayer parsers can tag PDUs and other arbitrary frames in the stream while parsing. These frames can then be inspected from the rule language. This will allow rules that are more precise and less costly. The frames are stored per direction in the `AppLayerParserState` and will only be initialized when actual frames are in use. The per direction storage has a fixed size static portion and dynamic support for a larger number. This is done for effeciency. When the Stream Buffer slides, frames are updated as they use offsets relative to the stream. A negative offset is used for frames that started before the current window. Frames have events to inspect/log parser errors that don't fit the TX model. Frame id starts at 1. So implementations can keep track of frame ids where 0 is not set. Frames affect TCP window sliding. The frames keep a "left edge" which signifies how much data to keep for frames that are still in progress. |
3 years ago |