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Add methods to get StreamContext from tag, and mark it as recognised

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Separate methods are needed to be able to restart reading from a stream
in the case of errors. Tag should be marked as recognised only after
successfully reading the stream.

Closes #2225
This commit is contained in:
Daniel Lublin
2021-12-10 13:16:08 +01:00
parent 0a98566298
commit f8b3d79813
5 changed files with 179 additions and 45 deletions
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18
bramble-api/src/main/java/org/briarproject/bramble/api/transport/KeyManager.java
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@@ -113,9 +113,25 @@ public interface KeyManager {
/**
* Looks up the given tag and returns a {@link StreamContext} for reading
* from the corresponding stream, or null if an error occurs or the tag was
* unexpected.
* unexpected. Marks the tag as recognised and updates the reordering
* window.
*/
@Nullable
StreamContext getStreamContext(TransportId t, byte[] tag)
throws DbException;
/**
* Looks up the given tag and returns a {@link StreamContext} for reading
* from the corresponding stream, or null if an error occurs or the tag was
* unexpected. Only returns the StreamContext; does not mark the tag as
* recognised.
*/
@Nullable
StreamContext getStreamContextOnly(TransportId t, byte[] tag)
throws DbException;
/**
* Marks the tag as recognised and updates the reordering window.
*/
void markTagAsRecognised(TransportId t, byte[] tag) throws DbException;
}