diff --git a/patches/openwrt/0008-dropbear-increase-default-receive-window-size.patch b/patches/openwrt/0008-dropbear-increase-default-receive-window-size.patch new file mode 100644 index 0000000000000000000000000000000000000000..6617b7197cce0bd10c1610ad8875963e2343b085 --- /dev/null +++ b/patches/openwrt/0008-dropbear-increase-default-receive-window-size.patch @@ -0,0 +1,31 @@ +From: David Bauer <mail@david-bauer.net> +Date: Thu, 28 Dec 2023 23:16:02 +0100 +Subject: dropbear: increase default receive window size + +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 f95eecfb21ff08662e022accd30e8254028ff63b) + +diff --git a/package/network/services/dropbear/files/dropbear.init b/package/network/services/dropbear/files/dropbear.init +index b82e967cbcedc4564dba6cfccc1383f7b7fa499f..a40b5f7baeea0f3a1e258f1a74aba0eb1ca3adcb 100755 +--- a/package/network/services/dropbear/files/dropbear.init ++++ b/package/network/services/dropbear/files/dropbear.init +@@ -155,6 +155,12 @@ dropbear_instance() + PIDCOUNT="$(( ${PIDCOUNT} + 1))" + local pid_file="/var/run/${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_set_param command "$PROG" -F -P "$pid_file" + [ "${PasswordAuth}" -eq 0 ] && procd_append_param command -s