Micah Elizabeth Scott authored Jan 18, 2023 and David Goulet committed Jan 25, 2023

Add new liblzma enums (LZMA_SEEK_NEEDED and LZMA_RET_INTERNAL*)
conditional to the API version they arrived in. The first stable
version of liblzma this affects is 5.4.0

Fixes #40741



Signed-off-by: Micah Elizabeth Scott <beth@torproject.org>

Fixes #40745



Signed-off-by: David Goulet <dgoulet@torproject.org>

Micah Elizabeth Scott authored Jan 18, 2023 and David Goulet committed Jan 19, 2023

Add new liblzma enums (LZMA_SEEK_NEEDED and LZMA_RET_INTERNAL*)
conditional to the API version they arrived in. The first stable
version of liblzma this affects is 5.4.0

Fixes #40741



Signed-off-by: Micah Elizabeth Scott <beth@torproject.org>

Nick Mathewson authored Jan 19, 2023 and David Goulet committed Jan 19, 2023

These are verified-as-correct against the current C implementation;
adding them here gives us something to copy into Arti.

Fixes #40743



Signed-off-by: David Goulet <dgoulet@torproject.org>

Signed-off-by: David Goulet <dgoulet@torproject.org>

Signed-off-by: David Goulet <dgoulet@torproject.org>

Closes #40664



Signed-off-by: David Goulet <dgoulet@torproject.org>

This prevents sign extension overflow in cwnd_became_full().

If a circuit only sends a tiny amount of data such that its cwnd is not
full, it won't increase its cwnd above the minimum. Since slow start circuits
should never hit the minimum otherwise, we can just ignore them for RTT reset
to handle this.