Add OpenVPN with MPTCP upstream support

openvpn/files/etc/hotplug.d/openvpn/01-user

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+[ -e "/etc/openvpn.user" ] && {
+	env -i ACTION="$ACTION" INSTANCE="$INSTANCE" \
+		/bin/sh \
+		/etc/openvpn.user \
+		$*
+}
+
+# Wrap user defined scripts on up/down events
+case "$ACTION" in
+	up) command=$user_up ;;
+	down) command=$user_down ;;
+	*) command= ;;
+esac
+
+if [ -n "$command" ]; then
+	shift
+	exec /bin/sh -c "$command $*"
+fi
+
+exit 0

openvpn/files/etc/openvpn.user

@@ -0,0 +1,11 @@
+#!/bin/sh
+#
+# This file is interpreted as shell script.
+# Put your custom openvpn action here, they will
+# be executed with each opevnp event.
+#
+# $ACTION
+#      <down>    down action is generated after the TUN/TAP device is closed
+#      <up>      up action is generated after the TUN/TAP device is opened
+# $INSTANCE  Name of the openvpn instance which went up or down
+

openvpn/files/lib/functions/openvpn.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+get_openvpn_option() {
+	local config="$1"
+	local variable="$2"
+	local option="$3"
+
+	local value="$(sed -rne 's/^[ \t]*'"$option"'[ \t]+'"'([^']+)'"'[ \t]*$/\1/p' "$config" | tail -n1)"
+	[ -n "$value" ] || value="$(sed -rne 's/^[ \t]*'"$option"'[ \t]+"(([^"\\]|\\.)+)"[ \t]*$/\1/p' "$config" | tail -n1 | sed -re 's/\\(.)/\1/g')"
+	[ -n "$value" ] || value="$(sed -rne 's/^[ \t]*'"$option"'[ \t]+(([^ \t\\]|\\.)+)[ \t]*$/\1/p' "$config" | tail -n1 | sed -re 's/\\(.)/\1/g')"
+	[ -n "$value" ] || return 1
+
+	export -n "$variable=$value"
+	return 0
+}
+

openvpn/files/openvpn.config

@@ -0,0 +1,506 @@
+package openvpn
+
+#################################################
+# Sample to include a custom config file.       #
+#################################################
+
+config openvpn custom_config
+
+	# Set to 1 to enable this instance:
+	option enabled 0
+
+	# Credentials to login
+	#option username 'login'
+	#option password 'password'
+
+	# Password for client certificate
+	#option cert_password 'cert_password'
+
+	# Include OpenVPN configuration
+	option config /etc/openvpn/my-vpn.conf
+
+
+#################################################
+# Sample OpenVPN 2.0 uci config for             #
+# multi-client server.                          #
+#################################################
+
+config openvpn sample_server
+
+	# Set to 1 to enable this instance:
+	option enabled 0
+
+	# Which local IP address should OpenVPN
+	# listen on? (optional)
+#	option local 0.0.0.0
+
+	# Which TCP/UDP port should OpenVPN listen on?
+	# If you want to run multiple OpenVPN instances
+	# on the same machine, use a different port
+	# number for each one.  You will need to
+	# open up this port on your firewall.
+	option port 1194
+
+	# TCP or UDP server?
+#	option proto tcp
+	option proto udp
+
+	# "dev tun" will create a routed IP tunnel,
+	# "dev tap" will create an ethernet tunnel.
+	# Use "dev tap0" if you are ethernet bridging
+	# and have precreated a tap0 virtual interface
+	# and bridged it with your ethernet interface.
+	# If you want to control access policies
+	# over the VPN, you must create firewall
+	# rules for the the TUN/TAP interface.
+	# On non-Windows systems, you can give
+	# an explicit unit number, such as tun0.
+	# On Windows, use "dev-node" for this.
+	# On most systems, the VPN will not function
+	# unless you partially or fully disable
+	# the firewall for the TUN/TAP interface.
+#	option dev tap
+	option dev tun
+
+	# SSL/TLS root certificate (ca), certificate
+	# (cert), and private key (key).  Each client
+	# and the server must have their own cert and
+	# key file.  The server and all clients will
+	# use the same ca file.
+	#
+	# See the "easy-rsa" directory for a series
+	# of scripts for generating RSA certificates
+	# and private keys.  Remember to use
+	# a unique Common Name for the server
+	# and each of the client certificates.
+	#
+	# Any X509 key management system can be used.
+	# OpenVPN can also use a PKCS #12 formatted key file
+	# (see "pkcs12" directive in man page).
+	option ca /etc/openvpn/ca.crt
+	option cert /etc/openvpn/server.crt
+	# This file should be kept secret:
+	option key /etc/openvpn/server.key
+
+	# Diffie hellman parameters.
+	# Generate your own with:
+	#   openssl dhparam -out dh2048.pem 2048
+	# Substitute 2048 for 1024 if you are using
+	# 1024 bit keys.
+	option dh /etc/openvpn/dh2048.pem
+
+	# Configure server mode and supply a VPN subnet
+	# for OpenVPN to draw client addresses from.
+	# The server will take 10.8.0.1 for itself,
+	# the rest will be made available to clients.
+	# Each client will be able to reach the server
+	# on 10.8.0.1. Comment this line out if you are
+	# ethernet bridging. See the man page for more info.
+	option server "10.8.0.0 255.255.255.0"
+
+	# Maintain a record of client <-> virtual IP address
+	# associations in this file.  If OpenVPN goes down or
+	# is restarted, reconnecting clients can be assigned
+	# the same virtual IP address from the pool that was
+	# previously assigned.
+	option ifconfig_pool_persist /tmp/ipp.txt
+
+	# Configure server mode for ethernet bridging.
+	# You must first use your OS's bridging capability
+	# to bridge the TAP interface with the ethernet
+	# NIC interface.  Then you must manually set the
+	# IP/netmask on the bridge interface, here we
+	# assume 10.8.0.4/255.255.255.0.  Finally we
+	# must set aside an IP range in this subnet
+	# (start=10.8.0.50 end=10.8.0.100) to allocate
+	# to connecting clients.  Leave this line commented
+	# out unless you are ethernet bridging.
+#	option server_bridge "10.8.0.4 255.255.255.0 10.8.0.50 10.8.0.100"
+
+	# Push routes to the client to allow it
+	# to reach other private subnets behind
+	# the server.  Remember that these
+	# private subnets will also need
+	# to know to route the OpenVPN client
+	# address pool (10.8.0.0/255.255.255.0)
+	# back to the OpenVPN server.
+#	list push "route 192.168.10.0 255.255.255.0"
+#	list push "route 192.168.20.0 255.255.255.0"
+
+	# To assign specific IP addresses to specific
+	# clients or if a connecting client has a private
+	# subnet behind it that should also have VPN access,
+	# use the subdirectory "ccd" for client-specific
+	# configuration files (see man page for more info).
+
+	# EXAMPLE: Suppose the client
+	# having the certificate common name "Thelonious"
+	# also has a small subnet behind his connecting
+	# machine, such as 192.168.40.128/255.255.255.248.
+	# First, uncomment out these lines:
+#	option client_config_dir /etc/openvpn/ccd
+#	list route "192.168.40.128 255.255.255.248"
+	# Then create a file ccd/Thelonious with this line:
+	#   iroute 192.168.40.128 255.255.255.248
+	# This will allow Thelonious' private subnet to
+	# access the VPN.  This example will only work
+	# if you are routing, not bridging, i.e. you are
+	# using "dev tun" and "server" directives.
+
+	# EXAMPLE: Suppose you want to give
+	# Thelonious a fixed VPN IP address of 10.9.0.1.
+	# First uncomment out these lines:
+#	option client_config_dir /etc/openvpn/ccd
+#	list route "10.9.0.0 255.255.255.252"
+#	list route "192.168.100.0 255.255.255.0"
+	# Then add this line to ccd/Thelonious:
+	#   ifconfig-push "10.9.0.1 10.9.0.2"
+
+	# Suppose that you want to enable different
+	# firewall access policies for different groups
+	# of clients.  There are two methods:
+	# (1) Run multiple OpenVPN daemons, one for each
+	#     group, and firewall the TUN/TAP interface
+	#     for each group/daemon appropriately.
+	# (2) (Advanced) Create a script to dynamically
+	#     modify the firewall in response to access
+	#     from different clients.  See man
+	#     page for more info on learn-address script.
+#	option learn_address /etc/openvpn/script
+
+	# If enabled, this directive will configure
+	# all clients to redirect their default
+	# network gateway through the VPN, causing
+	# all IP traffic such as web browsing and
+	# and DNS lookups to go through the VPN
+	# (The OpenVPN server machine may need to NAT
+	# the TUN/TAP interface to the internet in
+	# order for this to work properly).
+	# CAVEAT: May break client's network config if
+	# client's local DHCP server packets get routed
+	# through the tunnel.  Solution: make sure
+	# client's local DHCP server is reachable via
+	# a more specific route than the default route
+	# of 0.0.0.0/0.0.0.0.
+#	list push "redirect-gateway"
+
+	# Certain Windows-specific network settings
+	# can be pushed to clients, such as DNS
+	# or WINS server addresses.  CAVEAT:
+	# http://openvpn.net/faq.html#dhcpcaveats
+#	list push "dhcp-option DNS 10.8.0.1"
+#	list push "dhcp-option WINS 10.8.0.1"
+
+	# Uncomment this directive to allow different
+	# clients to be able to "see" each other.
+	# By default, clients will only see the server.
+	# To force clients to only see the server, you
+	# will also need to appropriately firewall the
+	# server's TUN/TAP interface.
+#	option client_to_client 1
+
+	# Uncomment this directive if multiple clients
+	# might connect with the same certificate/key
+	# files or common names.  This is recommended
+	# only for testing purposes.  For production use,
+	# each client should have its own certificate/key
+	# pair.
+	#
+	# IF YOU HAVE NOT GENERATED INDIVIDUAL
+	# CERTIFICATE/KEY PAIRS FOR EACH CLIENT,
+	# EACH HAVING ITS OWN UNIQUE "COMMON NAME",
+	# UNCOMMENT THIS LINE OUT.
+#	option duplicate_cn 1
+
+	# The keepalive directive causes ping-like
+	# messages to be sent back and forth over
+	# the link so that each side knows when
+	# the other side has gone down.
+	# Ping every 10 seconds, assume that remote
+	# peer is down if no ping received during
+	# a 120 second time period.
+	option keepalive "10 120"
+
+	# For extra security beyond that provided
+	# by SSL/TLS, create an "HMAC firewall"
+	# to help block DoS attacks and UDP port flooding.
+	#
+	# Generate with:
+	#   openvpn --genkey --secret ta.key
+	#
+	# The server and each client must have
+	# a copy of this key.
+	# The second parameter should be '0'
+	# on the server and '1' on the clients.
+	# This file is secret:
+#	option tls_auth "/etc/openvpn/ta.key 0"
+
+	# For additional privacy, a shared secret key
+	# can be used for both authentication (as in tls_auth)
+	# and encryption of the TLS control channel.
+	#
+	# Generate a shared secret with:
+	# openvpn --genkey --secret ta.key
+	#
+	# The server and each client must have
+	# a copy of this key.
+	#
+	# tls_auth and tls_crypt should NOT
+	# be combined, as tls_crypt implies tls_auth.
+	# Use EITHER tls_crypt, tls_auth, or neither option.
+#	option tls_crypt "/etc/openvpn/ta.key"
+
+	# Set the minimum required TLS protocol version
+	# for all connections.
+	#
+	# Require at least TLS 1.1
+#	option tls_version_min "1.1"
+	# Require at least TLS 1.2
+#	option tls_version_min "1.2"
+	# Require TLS 1.2, or the highest version supported
+	# on the system
+#	option tls_version_min "1.2 'or-highest'"
+
+	# List the preferred ciphers to use for the data channel.
+	# Run openvpn --show-ciphers to see all supported ciphers.
+#	list data_ciphers 'AES-256-GCM'
+#	list data_ciphers 'AES-128-GCM'
+#	list data_ciphers 'CHACHA20-POLY1305'
+
+	# Set a fallback cipher in order to be compatible with
+	# peers that do not support cipher negotiation.
+	#
+	# Use AES-256-CBC as fallback
+#	option data_ciphers_fallback 'AES-128-CBC'
+	# Use AES-128-CBC as fallback
+#	option data_ciphers_fallback 'AES-256-CBC'
+	# Use Triple-DES as fallback
+#	option data_ciphers_fallback 'DES-EDE3-CBC'
+	# Use BF-CBC as fallback
+#	option data_ciphers_fallback 'BF-CBC'
+
+	# OpenVPN versions 2.4 and later will attempt to
+	# automatically negotiate the most secure cipher
+	# between the client and server, regardless of a
+	# configured "option cipher" (see below).
+	# Automatic negotiation is recommended.
+	#
+	# Uncomment this option to disable this behavior,
+	# and force all OpenVPN peers to use the configured
+	# cipher option instead (not recommended).
+#	option ncp_disable
+
+	# Enable compression on the VPN link.
+	# If you enable it here, you must also
+	# enable it in the client config file.
+	#
+	# Compression is not recommended, as compression and
+	# encryption in combination can weaken the security
+	# of the connection.
+	#
+	# LZ4 requires OpenVPN 2.4+ client and server
+#	option compress lz4
+	# LZO is available by default only in openvpn-openssl variant
+	# LZO is compatible with most OpenVPN versions
+#	option compress lzo
+	
+	# Control how OpenVPN handles peers using compression
+	#
+	# Do not allow any connections using compression
+#	option allow_compression 'no'
+	# Allow incoming compressed packets, but do not send compressed packets to other peers
+	# This can be useful when migrating old configurations with compression activated
+#	option allow_compression 'asym'
+	# Both incoming and outgoing packets may be compressed
+#	option allow_compression 'yes'
+
+	# The maximum number of concurrently connected
+	# clients we want to allow.
+#	option max_clients 100
+
+	# The persist options will try to avoid
+	# accessing certain resources on restart
+	# that may no longer be accessible because
+	# of the privilege downgrade.
+	option persist_key 1
+	option persist_tun 1
+	option user nobody
+
+	# Output a short status file showing
+	# current connections, truncated
+	# and rewritten every minute.
+	option status /tmp/openvpn-status.log
+
+	# By default, log messages will go to the syslog (or
+	# on Windows, if running as a service, they will go to
+	# the "\Program Files\OpenVPN\log" directory).
+	# Use log or log-append to override this default.
+	# "log" will truncate the log file on OpenVPN startup,
+	# while "log-append" will append to it.  Use one
+	# or the other (but not both).
+#	option log         /tmp/openvpn.log
+#	option log_append  /tmp/openvpn.log
+
+	# Set the appropriate level of log
+	# file verbosity.
+	#
+	# 0 is silent, except for fatal errors
+	# 4 is reasonable for general usage
+	# 5 and 6 can help to debug connection problems
+	# 9 is extremely verbose
+	option verb 3
+
+	# Silence repeating messages.  At most 20
+	# sequential messages of the same message
+	# category will be output to the log.
+#	option mute 20
+
+
+##############################################
+# Sample client-side OpenVPN 2.0 uci config  #
+# for connecting to multi-client server.     #
+##############################################
+
+config openvpn sample_client
+
+	# Set to 1 to enable this instance:
+	option enabled 0
+
+	# Specify that we are a client and that we
+	# will be pulling certain config file directives
+	# from the server.
+	option client 1
+
+	# Use the same setting as you are using on
+	# the server.
+	# On most systems, the VPN will not function
+	# unless you partially or fully disable
+	# the firewall for the TUN/TAP interface.
+#	option dev tap
+	option dev tun
+
+	# Are we connecting to a TCP or
+	# UDP server?  Use the same setting as
+	# on the server.
+#	option proto tcp
+	option proto udp
+
+	# The hostname/IP and port of the server.
+	# You can have multiple remote entries
+	# to load balance between the servers.
+	list remote "my_server_1 1194"
+#	list remote "my_server_2 1194"
+
+	# Choose a random host from the remote
+	# list for load_balancing.  Otherwise
+	# try hosts in the order specified.
+#	option remote_random 1
+
+	# Keep trying indefinitely to resolve the
+	# host name of the OpenVPN server.  Very useful
+	# on machines which are not permanently connected
+	# to the internet such as laptops.
+	option resolv_retry infinite
+
+	# Most clients don't need to bind to
+	# a specific local port number.
+	option nobind 1
+
+	# Try to preserve some state across restarts.
+	option persist_key 1
+	option persist_tun 1
+	option user nobody
+
+	# If you are connecting through an
+	# HTTP proxy to reach the actual OpenVPN
+	# server, put the proxy server/IP and
+	# port number here.  See the man page
+	# if your proxy server requires
+	# authentication.
+	# retry on connection failures:
+#	option http_proxy_retry 1
+	# specify http proxy address and port:
+#	option http_proxy "192.168.1.100 8080"
+
+	# Wireless networks often produce a lot
+	# of duplicate packets.  Set this flag
+	# to silence duplicate packet warnings.
+#	option mute_replay_warnings 1
+
+	# SSL/TLS parms.
+	# See the server config file for more
+	# description.  It's best to use
+	# a separate .crt/.key file pair
+	# for each client.  A single ca
+	# file can be used for all clients.
+	option ca /etc/openvpn/ca.crt
+	option cert /etc/openvpn/client.crt
+	option key /etc/openvpn/client.key
+
+	# Verify server certificate by checking
+	# that the certicate has the key usage
+	# field set to "server".  This is an
+	# important precaution to protect against
+	# a potential attack discussed here:
+	#  http://openvpn.net/howto.html#mitm
+	#
+	# To use this feature, you will need to generate
+	# your server certificates with the nsCertType
+	# field set to "server".  The build_key_server
+	# script in the easy_rsa folder will do this.
+#	option remote_cert_tls server
+
+	# If a tls_auth key is used on the server
+	# then every client must also have the key.
+#	option tls_auth "/etc/openvpn/ta.key 1"
+
+	# If a tls_crypt key is used on the server
+	# every client must also have the key.
+#	option tls_crypt "/etc/openvpn/ta.key"
+
+	# Set the minimum required TLS protocol version
+	# for all connections.
+	#
+	# Require at least TLS 1.1
+#	option tls_version_min "1.1"
+	# Require at least TLS 1.2
+#	option tls_version_min "1.2"
+	# Require TLS 1.2, or the highest version supported
+	# on the system
+#	option tls_version_min "1.2 'or-highest'"
+
+	# List the preferred ciphers for the data channel.
+#	list data_ciphers 'AES-256-GCM'
+#	list data_ciphers 'AES-128-GCM'
+#	list data_ciphers 'CHACHA20-POLY1305'
+
+	# Set a fallback cipher if you connect to a peer that does
+	# not support cipher negotiation.
+	# Use AES-256-CBC as fallback
+#	option data_ciphers_fallback 'AES-128-CBC'
+	# Use AES-128-CBC as fallback
+#	option data_ciphers_fallback 'AES-256-CBC'
+	# Use Triple-DES as fallback
+#	option data_ciphers_fallback 'DES-EDE3-CBC'
+	# Use BF-CBC as fallback
+#	option data_ciphers_fallback 'BF-CBC'
+
+	# Enable compression on the VPN link.
+	# Don't enable this unless it is also
+	# enabled in the server config file.
+	#
+	# Compression is not recommended, as compression and
+	# encryption in combination can weaken the security
+	# of the connection.
+	#
+	# LZ4 requires OpenVPN 2.4+ on server and client
+#	option compress lz4
+	# LZO is available by default only in openvpn-openssl variant
+	# LZO is compatible with most OpenVPN versions
+#	option compress lzo
+
+	# Set log file verbosity.
+	option verb 3
+
+	# Silence repeating messages
+#	option mute 20

openvpn/files/openvpn.init

@@ -0,0 +1,271 @@
+#!/bin/sh /etc/rc.common
+# Copyright (C) 2008-2013 OpenWrt.org
+# Copyright (C) 2008 Jo-Philipp Wich
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+
+START=90
+STOP=10
+
+USE_PROCD=1
+PROG=/usr/sbin/openvpn
+
+LIST_SEP="
+"
+
+UCI_STARTED=
+UCI_DISABLED=
+
+version_over_5_4() {
+	MAJOR_VERSION=$(uname -r | awk -F '.' '{print $1}')
+	MINOR_VERSION=$(uname -r | awk -F '.' '{print $2}')
+	if [ $MAJOR_VERSION -ge 5 ] && [ $MINOR_VERSION -gt 13 ] || [ $MAJOR_VERSION -gt 5 ] ; then
+		return 0
+	else
+		return 1
+	fi
+}
+
+append_param() {
+	local s="$1"
+	local v="$2"
+	case "$v" in
+		*_*_*_*) v=${v%%_*}-${v#*_}; v=${v%%_*}-${v#*_}; v=${v%%_*}-${v#*_} ;;
+		*_*_*)   v=${v%%_*}-${v#*_}; v=${v%%_*}-${v#*_} ;;
+		*_*)     v=${v%%_*}-${v#*_} ;;
+	esac
+	echo -n "$v" >> "/var/etc/openvpn-$s.conf"
+	return 0
+}
+
+append_bools() {
+	local p; local v; local s="$1"; shift
+	for p in $*; do
+		config_get_bool v "$s" "$p"
+		[ "$v" = 1 ] && append_param "$s" "$p" && echo >> "/var/etc/openvpn-$s.conf"
+	done
+}
+
+append_params() {
+	local p; local v; local s="$1"; shift
+	for p in $*; do
+		config_get v "$s" "$p"
+		IFS="$LIST_SEP"
+		for v in $v; do
+			[ "$v" = "frames_only" ] && [ "$p" = "compress" ] && unset v && append_param "$s" "$p" && echo >> "/var/etc/openvpn-$s.conf"
+			[ -n "$v" ] && [ "$p" != "push" ] && append_param "$s" "$p" && echo " $v" >> "/var/etc/openvpn-$s.conf"
+			[ -n "$v" ] && [ "$p" = "push" ] && append_param "$s" "$p" && echo " \"$v\"" >> "/var/etc/openvpn-$s.conf"
+		done
+		unset IFS
+	done
+}
+
+append_list() {
+	local p; local v; local s="$1"; shift
+
+	list_cb_append() {
+		v="${v}:$1"
+	}
+
+	for p in $*; do
+		unset v
+		config_list_foreach "$s" "$p" list_cb_append
+		[ -n "$v" ] && append_param "$s" "$p" && echo " ${v:1}" >> "/var/etc/openvpn-$s.conf"
+	done
+}
+
+section_enabled() {
+	config_get_bool enable  "$1" 'enable'  0
+	config_get_bool enabled "$1" 'enabled' 0
+	[ $enable -gt 0 ] || [ $enabled -gt 0 ]
+}
+
+create_temp_file() {
+	mkdir -p "$(dirname "$1")"
+	rm -f "$1"
+	touch "$1"
+	chown root "$1"
+	chmod 0600 "$1"
+}
+
+openvpn_get_dev() {
+	local dev dev_type
+	local name="$1"
+	local conf="$2"
+
+	# Do override only for configurations with config_file
+	config_get config_file "$name" config
+	[ -n "$config_file" ] || return
+
+	# Check there is someething to override
+	config_get dev "$name" dev
+	config_get dev_type "$name" dev_type
+	[ -n "$dev" ] || return
+
+	# If there is a no dev_type, try to guess it
+	if [ -z "$dev_type" ]; then
+		. /lib/functions/openvpn.sh
+
+		local odev odev_type
+		get_openvpn_option "$conf" odev dev
+		get_openvpn_option "$conf" odev_type dev-type
+		[ -n "$odev_type" ] || odev_type="$odev"
+
+		case "$odev_type" in
+			tun*) dev_type="tun" ;;
+			tap*) dev_type="tap" ;;
+			*) return;;
+		esac
+	fi
+
+	# Return overrides
+	echo "--dev-type $dev_type --dev $dev"
+}
+
+openvpn_get_credentials() {
+	local name="$1"
+	local ret=""
+
+	config_get cert_password "$name" cert_password
+	config_get password "$name" password
+	config_get username "$name" username
+
+	if [ -n "$cert_password" ]; then
+		create_temp_file /var/run/openvpn.$name.pass
+		echo "$cert_password" > /var/run/openvpn.$name.pass
+		ret=" --askpass /var/run/openvpn.$name.pass "
+	fi
+
+	if [ -n "$username" ]; then
+		create_temp_file /var/run/openvpn.$name.userpass
+		echo "$username" > /var/run/openvpn.$name.userpass
+		echo "$password" >> /var/run/openvpn.$name.userpass
+		ret=" --auth-user-pass /var/run/openvpn.$name.userpass "
+	fi
+
+	# Return overrides
+	echo "$ret"
+}
+
+openvpn_add_instance() {
+	local name="$1"
+	local dir="$2"
+	local conf=$(basename "$3")
+	local security="$4"
+	local up="$5"
+	local down="$6"
+	local client=$(grep -qEx "client|tls-client" "$dir/$conf" && echo 1)
+
+	procd_open_instance "$name"
+	procd_set_param command "$PROG"	\
+		--syslog "openvpn($name)" \
+		--status "/var/run/openvpn.$name.status" \
+		--cd "$dir" \
+		--config "$conf" \
+		--up "/usr/libexec/openvpn-hotplug up $name" \
+		--down "/usr/libexec/openvpn-hotplug down $name" \
+		--route-up "/usr/libexec/openvpn-hotplug route-up $name" \
+		--route-pre-down "/usr/libexec/openvpn-hotplug route-pre-down $name" \
+		${client:+--ipchange "/usr/libexec/openvpn-hotplug ipchange $name"} \
+		${up:+--setenv user_up "$up"} \
+		${down:+--setenv user_down "$down"} \
+		--script-security "${security:-2}" \
+		$(openvpn_get_dev "$name" "$conf") \
+		$(openvpn_get_credentials "$name" "$conf")
+	if version_over_5_4; then
+		procd_append_param command "--mptcp"
+	fi
+	procd_set_param file "$dir/$conf"
+	procd_set_param term_timeout 15
+	procd_set_param respawn
+	procd_append_param respawn 3600
+	procd_append_param respawn 5
+	procd_append_param respawn -1
+	procd_close_instance
+}
+
+start_instance() {
+	local s="$1"
+
+	config_get config "$s" config
+	config="${config:+$(readlink -f "$config")}"
+
+	section_enabled "$s" || {
+		append UCI_DISABLED "$config" "$LIST_SEP"
+		return 1
+	}
+
+	local up down script_security
+	config_get up "$s" up
+	config_get down "$s" down
+	config_get script_security "$s" script_security
+
+	[ ! -d "/var/run" ] && mkdir -p "/var/run"
+
+	if [ ! -z "$config" ]; then
+		append UCI_STARTED "$config" "$LIST_SEP"
+		[ -n "$up" ] || get_openvpn_option "$config" up up
+		[ -n "$down" ] || get_openvpn_option "$config" down down
+		openvpn_add_instance "$s" "${config%/*}" "$config" "$script_security" "$up" "$down"
+		return
+	fi
+
+	create_temp_file "/var/etc/openvpn-$s.conf"
+
+	append_bools "$s" $OPENVPN_BOOLS
+	append_params "$s" $OPENVPN_PARAMS
+	append_list "$s" $OPENVPN_LIST
+
+	openvpn_add_instance "$s" "/var/etc" "openvpn-$s.conf" "$script_security" "$up" "$down"
+}
+
+start_service() {
+	local instance="$1"
+	local instance_found=0
+
+	config_cb() {
+		local type="$1"
+		local name="$2"
+		if [ "$type" = "openvpn" ]; then
+			if [ -n "$instance" -a "$instance" = "$name" ]; then
+				instance_found=1
+			fi
+		fi
+	}
+
+	. /lib/functions/openvpn.sh
+	. /usr/share/openvpn/openvpn.options
+	config_load 'openvpn'
+
+	if [ -n "$instance" ]; then
+		[ "$instance_found" -gt 0 ] || return
+		start_instance "$instance"
+	else
+		config_foreach start_instance 'openvpn'
+
+		local path name up down
+		for path in /etc/openvpn/*.conf; do
+			if [ -f "$path" ]; then
+				name="${path##*/}"; name="${name%.conf}"
+
+				# don't start configs again that are already started by uci
+				if echo "$UCI_STARTED" | grep -qxF "$path"; then
+					continue
+
+				# don't start configs which are set to disabled in uci
+				elif echo "$UCI_DISABLED" | grep -qxF "$path"; then
+					logger -t openvpn "$name.conf is disabled in /etc/config/openvpn"
+					continue
+				fi
+
+				get_openvpn_option "$path" up up || up=""
+				get_openvpn_option "$path" down down || down=""
+				openvpn_add_instance "$name" "${path%/*}" "$path" "" "$up" "$down"
+			fi
+		done
+	fi
+}
+
+service_triggers() {
+	procd_add_reload_trigger openvpn
+}

openvpn/files/openvpn.options

@@ -0,0 +1,206 @@
+OPENVPN_PARAMS='
+allow_compression
+askpass
+auth
+auth_retry
+auth_user_pass
+auth_user_pass_verify
+bcast_buffers
+bind_dev
+ca
+capath
+cd
+cert
+chroot
+cipher
+client_config_dir
+client_connect
+client_disconnect
+comp_lzo
+compress
+connect_freq
+connect_retry
+connect_retry_max
+connect_timeout
+crl_verify
+data_ciphers_fallback
+dev
+dev_node
+dev_type
+dh
+ecdh_curve
+echo
+engine
+explicit_exit_notify
+extra_certs
+fragment
+group
+hand_window
+hash_size
+http_proxy
+http_proxy_option
+http_proxy_timeout
+ifconfig
+ifconfig_ipv6
+ifconfig_ipv6_pool
+ifconfig_ipv6_push
+ifconfig_pool
+ifconfig_pool_persist
+ifconfig_push
+inactive
+ipchange
+iroute
+iroute_ipv6
+keepalive
+key
+key_direction
+keysize
+learn_address
+link_mtu
+lladdr
+local
+log
+log_append
+lport
+management
+management_log_cache
+max_clients
+max_routes_per_client
+mode
+mssfix
+mtu_disc
+mute
+nice
+ping
+ping_exit
+ping_restart
+pkcs12
+plugin
+port
+port_share
+prng
+proto
+pull_filter
+push
+rcvbuf
+redirect_gateway
+remap_usr1
+remote
+remote_cert_eku
+remote_cert_ku
+remote_cert_tls
+reneg_bytes
+reneg_pkts
+reneg_sec
+replay_persist
+replay_window
+resolv_retry
+route
+route_delay
+route_gateway
+route_ipv6
+route_metric
+route_pre_down
+route_up
+rport
+secret
+server
+server_bridge
+server_ipv6
+server_poll_timeout
+setenv
+shaper
+sndbuf
+socks_proxy
+status
+status_version
+syslog
+tcp_queue_limit
+tls_auth
+tls_crypt
+tls_crypt_v2
+tls_crypt_v2_verify
+tls_export_cert
+tls_timeout
+tls_verify
+tls_version_min
+tmp_dir
+topology
+tran_window
+tun_mtu
+tun_mtu_extra
+txqueuelen
+user
+verb
+verify_client_cert
+verify_x509_name
+vlan_accept
+vlan_pvid
+x509_username_field
+'
+
+OPENVPN_BOOLS='
+allow_recursive_routing
+auth_nocache
+auth_user_pass_optional
+bind
+block_ipv6
+ccd_exclusive
+client
+client_to_client
+comp_noadapt
+disable
+disable_occ
+down_pre
+duplicate_cn
+fast_io
+float
+http_proxy_retry
+ifconfig_noexec
+ifconfig_nowarn
+management_forget_disconnect
+management_hold
+management_query_passwords
+management_signal
+mktun
+mlock
+mtu_test
+multihome
+mute_replay_warnings
+ncp_disable
+nobind
+opt_verify
+passtos
+persist_key
+persist_local_ip
+persist_remote_ip
+persist_tun
+ping_timer_rem
+pull
+push_peer_info
+push_reset
+remote_random
+rmtun
+route_noexec
+route_nopull
+single_session
+socks_proxy_retry
+suppress_timestamps
+tcp_nodelay
+test_crypto
+tls_client
+tls_exit
+tls_server
+up_delay
+up_restart
+username_as_common_name
+vlan_tagging
+'
+
+OPENVPN_LIST='
+data_ciphers
+ncp_ciphers
+tls_cipher
+tls_ciphersuites
+tls_groups
+'

openvpn/files/openvpn.upgrade

@@ -0,0 +1 @@
+/etc/openvpn/

openvpn/files/usr/libexec/openvpn-hotplug

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+ACTION=$1
+shift
+INSTANCE=$1
+shift
+
+export ACTION=$ACTION
+export INSTANCE=$INSTANCE
+exec /sbin/hotplug-call openvpn "$@"