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wgpeerselector: expect actual traffic flow 

Situations may happen in which handshakes are being received, but no actual traffic flows.
This commit adds checks on whether the tx/rx byte values have changed.
If not the connection is handled as being broken.
This commit is contained in:
Vincent Wiemann 2022-01-13 20:44:14 +01:00 committed by GitHub
parent a85fa336ba
commit ebb30426ec
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 12 additions and 3 deletions
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15
net/wgpeerselector/files/usr/bin/wgpeerselector
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@ -54,6 +54,8 @@ function WGPeer:new(o)
-- some defaults
o.rx_bytes = 0
o.tx_bytes = 0
o.prev_rx_bytes = 0
o.prev_tx_bytes = 0
o.latest_handshake = 0
o.established_at = 0
-- terminology:
@ -175,10 +177,17 @@ function WGPeer:established_time()
return (time.time() - self.established_at)
end
function WGPeer:has_recent_handshake()
function WGPeer:has_recent_success()
-- WireGuard handshakes are sent at least every 2 minutes, if there is
-- payload traffic.
return (time.time() - self.latest_handshake) < 150
if 150 < (time.time() - self.latest_handshake) then return false end
-- Check if actually traffic was able to be received
if 0 == (self.rx_bytes - self.prev_rx_bytes) then return false end
self.prev_rx_bytes = self.rx_bytes
-- Check if actually traffic was able to be sent
if 0 == (self.tx_bytes - self.prev_tx_bytes) then return false end
self.prev_tx_bytes = self.tx_bytes
return true
end
local WGPeerSelector = {}
@ -236,7 +245,7 @@ function WGPeerSelector:try_connect_to_peer(peer, timeout)
sleep(timeout)
peer:update_stats_from_kernel()
local connection_successful = peer:has_recent_handshake()
local connection_successful = peer:has_recent_success()
if not connection_successful then
peer:uninstall_from_kernel()