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Commit 61626897e7176c1e9605a9f841985da3d3607093

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Parents : 6fd3edb

Author : Mark Qvist <mark@unsigned.io>

Date : 2023-05-11T21:28:13+02:00

Add channel window mode for slow links

Changes

1 files changed, 12 insertions(+), 4 deletions(-)

M RNS/Channel.py +12 -4

Diff

diff --git a/RNS/Channel.py b/RNS/Channel.py

index c6ab8c5d..b3f6c6c5 100644

--- a/RNS/Channel.py

+++ b/RNS/Channel.py

@@ -251,6 +251,7 @@ class Channel(contextlib.AbstractContextManager):

# the max window size for fast links will be used.

RTT_FAST = 0.25

RTT_MEDIUM = 0.75

+ RTT_SLOW = 1.45

# The minimum allowed flexibility of the window size.

# The difference between window_max and window_min

@@ -274,13 +275,20 @@ class Channel(contextlib.AbstractContextManager):

self._next_rx_sequence = 0

self._message_factories: dict[int, Type[MessageBase]] = {}

self._max_tries = 5

- self.window = Channel.WINDOW

- self.window_max = Channel.WINDOW_MAX_SLOW

- self.window_min = Channel.WINDOW_MIN

- self.window_flexibility = Channel.WINDOW_FLEXIBILITY

self.fast_rate_rounds = 0

self.medium_rate_rounds = 0

+ if self._outlet.rtt > Channel.RTT_SLOW:

+ self.window = 1

+ self.window_max = 1

+ self.window_min = 1

+ self.window_flexibility = 1

+ else:

+ self.window = Channel.WINDOW

+ self.window_max = Channel.WINDOW_MAX_SLOW

+ self.window_min = Channel.WINDOW_MIN

+ self.window_flexibility = Channel.WINDOW_FLEXIBILITY

def __enter__(self) -> Channel:

return self