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dropbear: increase default receive window size

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Increasing the receive window size improves throughout on higher-latency
links such as WAN connections. The current default of 24KB caps out at
around 500 KB/s.

Increasing the receive buffer to 256KB increases the throughput to at
least 11 MB/s.

Signed-off-by: David Bauer <mail@david-bauer.net>
(cherry picked from commit f95eecfb21)
This commit is contained in:
David Bauer 2023-12-28 23:16:02 +01:00
parent 60e49cf170
commit 5cc1918a7a
1 changed files with 6 additions and 0 deletions
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6
package/network/services/dropbear/files/dropbear.init
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@ -155,6 +155,12 @@ dropbear_instance()
PIDCOUNT="$(( ${PIDCOUNT} + 1))" PIDCOUNT="$(( ${PIDCOUNT} + 1))"
local pid_file="/var/run/${NAME}.${PIDCOUNT}.pid" local pid_file="/var/run/${NAME}.${PIDCOUNT}.pid"
# Increase default receive window size to increase
# throughput on high latency links
if [ "${RecvWindowSize}" -eq "0" ]; then
RecvWindowSize="262144"
fi
procd_open_instance procd_open_instance
procd_set_param command "$PROG" -F -P "$pid_file" procd_set_param command "$PROG" -F -P "$pid_file"
[ "${PasswordAuth}" -eq 0 ] && procd_append_param command -s [ "${PasswordAuth}" -eq 0 ] && procd_append_param command -s