udpspeeder: Add new package udpspeeder to implement Forward Error Correction (FEC) for UDP VPNs like OpenVPN

Maintainer: @codemarauder
Compile tested: Yes
Run tested: x86_64 PCEngines APU

Description:

A Tunnel which Improves your Network Quality on a High-latency Lossy Link by using Forward Error Correction,for All Traffics(TCP/UDP/ICMP)
It does it by sending redundant packets and re-arranging them to account for packet loss over the link. It uses Reed–Solomon code.

Signed-off-by: Nishant Sharma <codemarauder@gmail.com>

net/udpspeeder/files/udpspeeder-init

@@ -0,0 +1,114 @@
+#!/bin/sh /etc/rc.common
+# Copyright (C) 2015 OpenWrt.org
+# Copyright (C) 2020 Nishant Sharma <nishant@hopbox.in>
+
+START=89
+STOP=11
+
+USE_PROCD=1
+PROG=/usr/bin/udpspeeder
+
+validate_udpspeeder_section() {
+	uci_validate_section udpspeeder udpspeeder "${1}" \
+		'enabled:bool:0'		\
+		'server:bool:0' 		\
+		'mode:integer:0' 		\
+		'mtu:integer:1250' 		\
+		'timeout:integer:8'		\
+		'local:string'			\
+		'remote:string'			\
+		'report:integer:10'		\
+		'disable_obscure:bool:0'	\
+		'interval:integer:0'		\
+		'fec:string:20:10'		\
+		'disable_fec:bool:0'		\
+		'sock_buf:integer:1024'		\
+		'log_level:integer:4'		\
+		'decode_buf:integer:2000'	\
+		'fix_latency:bool:0'		\
+		'queue_len:integer:200'		
+}
+
+start_instance() {
+
+	local section="$1"
+
+	local server mode mtu timeout local remote report disable_obscure fifo interval fec disable_fec sock_buf queue_len \
+		decode_buf sock_buf log_level enabled
+
+	fifo="/tmp/udpspeeder-${section}.fifo"
+
+	validate_udpspeeder_section $section || {
+		echo "validation failed"
+		return 1
+	}
+
+	if [ "${enabled}" -ne 1 ]
+	then
+		return 1
+	fi
+
+	procd_open_instance
+	procd_set_param respawn
+	procd_set_param stderr 1
+	procd_set_param stdout 1
+
+	procd_set_param command "${PROG}"
+
+	if [ "${server}" -eq 1 ]
+	then
+		procd_append_param command -s
+	else
+		procd_append_param command -c
+	fi
+
+	if [ "${disable_fec}" -eq 1 ]
+	then
+		procd_append_param command --disable-fec
+	else
+		procd_append_param command --fec "${fec}"
+	fi
+
+	if [ "${fix_latency}" -eq 1 ] && [ "${mode}" -eq 0 ]
+	then
+		procd_append_param command --fix-latency
+	fi
+
+	if [ "${disable_obscure}" -eq 1 ]
+	then
+		procd_append_param command --disable-obscure
+	fi
+
+	procd_append_param command -l "${local}"
+	procd_append_param command -r "${remote}"
+	procd_append_param command --mode "${mode}"
+	procd_append_param command --report "${report}"
+	procd_append_param command --interval "${interval}"
+	procd_append_param command --mtu "${mtu}"
+	procd_append_param command --sock-buf "${sock_buf}"
+	procd_append_param command --decode-buf "${decode_buf}"
+	procd_append_param command --queue-len "${queue_len}"
+	procd_append_param command --log-level "${log_level}"
+	procd_append_param command --fifo "${fifo}"
+	
+#	procd_set_param respawn ${respawn_threshold:-3600} ${respawn_timeout:-5} ${respawn_retry:-5}
+	procd_close_instance
+}
+
+start_service() {
+
+	config_load 'udpspeeder'
+	config_foreach start_instance 'udpspeeder'
+
+}
+
+stop_service()
+{
+	service_stop ${PROG}
+}
+
+service_triggers()
+{
+	procd_add_reload_trigger "udpspeeder"
+	procd_add_validation validate_udpspeeder_section
+}