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#!/bin/sh /etc/rc.common
#
# Copyright (C) 2017 Yousong Zhou <yszhou4tech@gmail.com>
#
# This is free software, licensed under the GNU General Public License v3.
# See /LICENSE for more information.
#
USE_PROCD=1
START=99
ss_confdir=/var/etc/shadowsocks-libev
ss_bindir=/usr/bin
q='"'
ss_mkjson() {
echo "{" >"$confjson"
if ss_mkjson_ "$@" >>$confjson; then
sed -i -e '/^\s*$/d' -e '2,$s/^/\t/' -e '$s/,$//' "$confjson"
echo "}" >>"$confjson"
else
rm -f "$confjson"
return 1
fi
}
ss_mkjson_() {
local func
for func in "$@"; do
"$func" || return 1
done
}
ss_mkjson_server_conf() {
local cfgserver
config_get cfgserver "$cfg" server
[ -n "$cfgserver" ] || return 1
eval "$(validate_server_section "$cfg" ss_validate_mklocal)"
validate_server_section "$cfgserver" || return 1
[ "$disabled" = 0 ] || return 1
ss_mkjson_server_conf_ "$cfgserver"
}
ss_mkjson_server_conf_() {
[ -n "$server_port" ] || return 1
password="${password//\"/\\\"}"
cat <<-EOF
${server:+${q}server${q}: ${q}$server${q},}
"server_port": $server_port,
${method:+${q}method${q}: ${q}$method${q},}
${key:+${q}key${q}: ${q}$key${q},}
${password:+${q}password${q}: ${q}$password${q},}
EOF
}
ss_mkjson_common_conf() {
[ "$ipv6_first" = 0 ] && ipv6_first=false || ipv6_first=true
[ "$fast_open" = 0 ] && fast_open=false || fast_open=true
[ "$reuse_port" = 0 ] && reuse_port=false || reuse_port=true
cat <<-EOF
"use_syslog": true,
"ipv6_first": $ipv6_first,
"fast_open": $fast_open,
"reuse_port": $reuse_port,
${local_address:+${q}local_address${q}: ${q}$local_address${q},}
${local_port:+${q}local_port${q}: $local_port,}
${mode:+${q}mode${q}: ${q}$mode${q},}
${mtu:+${q}mtu${q}: $mtu,}
${timeout:+${q}timeout${q}: $timeout,}
${user:+${q}user${q}: ${q}$user${q},}
EOF
}
ss_mkjson_ss_local_conf() {
ss_mkjson_server_conf
}
ss_mkjson_ss_redir_conf() {
ss_mkjson_server_conf || return 1
[ "$disable_sni" = 0 ] && disable_sni=false || disable_sni=true
cat <<-EOF
"disable_sni": $disable_sni,
EOF
}
ss_mkjson_ss_server_conf() {
ss_mkjson_server_conf_
}
ss_mkjson_ss_tunnel_conf() {
ss_mkjson_server_conf || return 1
[ -n "$tunnel_address" ] || return 1
cat <<-EOF
${tunnel_address:+${q}tunnel_address${q}: ${q}$tunnel_address${q},}
EOF
}
ss_xxx() {
local cfg="$1"
local cfgtype="$2"
local bin="$ss_bindir/${cfgtype/_/-}"
local confjson="$ss_confdir/$cfgtype.$cfg.json"
[ -x "$bin" ] || return
eval "$("validate_${cfgtype}_section" "$cfg" ss_validate_mklocal)"
"validate_${cfgtype}_section" "$cfg" || return 1
[ "$disabled" = 0 ] || return
if ss_mkjson \
ss_mkjson_common_conf \
ss_mkjson_${cfgtype}_conf \
; then
procd_open_instance "$cfgtype.$cfg"
procd_set_param command "$bin" -c "$confjson"
[ "$verbose" = 0 ] || procd_append_param command -v
[ "$no_delay" = 0 ] || procd_append_param command --no-delay
[ -z "$bind_address" ] || procd_append_param command -b "$bind_address"
procd_set_param file "$confjson"
procd_set_param respawn
procd_close_instance
ss_rules_cb
fi
}
ss_rules_cb() {
local cfgserver server
if [ "$cfgtype" = ss_redir ]; then
config_get cfgserver "$cfg" server
config_get server "$cfgserver" server
ss_redir_servers="$ss_redir_servers $server"
if [ "$mode" = tcp_only -o "$mode" = "tcp_and_udp" ]; then
eval "ss_rules_redir_tcp_$cfg=$local_port"
fi
if [ "$mode" = udp_only -o "$mode" = "tcp_and_udp" ]; then
eval "ss_rules_redir_udp_$cfg=$local_port"
fi
fi
}
ss_rules() {
local cfg="ss_rules"
local bin="$ss_bindir/ss-rules"
local cfgtype
local local_port_tcp local_port_udp
local args
[ -x "$bin" ] || return 1
config_get cfgtype "$cfg" TYPE
[ "$cfgtype" = ss_rules ] || return 1
eval "$(validate_ss_rules_section "$cfg" ss_validate_mklocal)"
validate_ss_rules_section "$cfg" || return 1
[ "$disabled" = 0 ] || return 1
eval local_port_tcp="\$ss_rules_redir_tcp_$redir_tcp"
eval local_port_udp="\$ss_rules_redir_udp_$redir_udp"
[ -n "$local_port_tcp" -o -n "$local_port_udp" ] || return 1
ss_redir_servers="$(echo "$ss_redir_servers" | tr ' ' '\n' | sort -u)"
[ "$dst_forward_recentrst" = 0 ] || args="$args --dst-forward-recentrst"
"$bin" \
-s "$ss_redir_servers" \
-l "$local_port_tcp" \
-L "$local_port_udp" \
--src-default "$src_default" \
--dst-default "$dst_default" \
--local-default "$local_default" \
--dst-bypass-file "$dst_ips_bypass_file" \
--dst-forward-file "$dst_ips_forward_file" \
--dst-bypass "$dst_ips_bypass" \
--dst-forward "$dst_ips_forward" \
--src-bypass "$src_ips_bypass" \
--src-forward "$src_ips_forward" \
--src-checkdst "$src_ips_checkdst" \
--ifnames "$ifnames" \
--ipt-extra "$ipt_args" \
$args \
|| "$bin" -f
}
start_service() {
local cfgtype
mkdir -p "$ss_confdir"
config_load shadowsocks-libev
for cfgtype in ss_local ss_redir ss_server ss_tunnel; do
config_foreach ss_xxx "$cfgtype" "$cfgtype"
done
ss_rules
}
stop_service() {
local bin="$ss_bindir/ss-rules"
[ -x "$bin" ] && "$bin" -f
rm -rf "$ss_confdir"
}
service_triggers() {
procd_add_reload_interface_trigger wan
procd_add_reload_trigger shadowsocks-libev
procd_open_validate
validate_server_section
validate_ss_local_section
validate_ss_redir_section
validate_ss_rules_section
validate_ss_server_section
validate_ss_tunnel_section
procd_close_validate
}
ss_validate_mklocal() {
local tuple opts
shift 2
for tuple in "$@"; do
opts="${tuple%%:*} $opts"
done
[ -z "$opts" ] || echo "local $opts"
}
ss_validate() {
uci_validate_section shadowsocks-libev "$@"
}
validate_common_server_options_() {
local cfgtype="$1"; shift
local cfg="$1"; shift
local func="$1"; shift
local stream_methods='"table", "rc4", "rc4-md5", "aes-128-cfb", "aes-192-cfb", "aes-256-cfb", "aes-128-ctr", "aes-192-ctr", "aes-256-ctr", "bf-cfb", "camellia-128-cfb", "camellia-192-cfb", "camellia-256-cfb", "salsa20", "chacha20", "chacha20-ietf"'
local aead_methods='"aes-128-gcm", "aes-192-gcm", "aes-256-gcm", "chacha20-ietf-poly1305", "xchacha20-ietf-poly1305"'
"${func:-ss_validate}" "$cfgtype" "$cfg" "$@" \
'disabled:bool:0' \
'server:host' \
'server_port:port' \
'password:string' \
'key:string' \
"method:or($stream_methods, $aead_methods)"
}
validate_common_client_options_() {
validate_common_options_ "$@" \
'server:uci("shadowsocks-libev", "@server")' \
'local_address:host:0.0.0.0' \
'local_port:port'
}
validate_common_options_() {
local cfgtype="$1"; shift
local cfg="$1"; shift
local func="$1"; shift
"${func:-ss_validate}" "$cfgtype" "$cfg" "$@" \
'disabled:bool:0' \
'fast_open:bool:0' \
'ipv6_first:bool:0' \
'no_delay:bool:0' \
'reuse_port:bool:0' \
'verbose:bool:0' \
'mode:or("tcp_only", "udp_only", "tcp_and_udp"):tcp_only' \
'mtu:uinteger' \
'timeout:uinteger' \
'user:string'
}
validate_server_section() {
validate_common_server_options_ server "$1" "${2}"
}
validate_ss_local_section() {
validate_common_client_options_ ss_local "$1" "${2}"
}
validate_ss_redir_section() {
validate_common_client_options_ ss_redir "$1" \
"${2}" \
'disable_sni:bool:0'
}
validate_ss_rules_section() {
"${2:-ss_validate}" ss_rules "$1" \
'disabled:bool:0' \
'redir_tcp:uci("shadowsocks-libev", "@ss_redir")' \
'redir_udp:uci("shadowsocks-libev", "@ss_redir")' \
'src_ips_bypass:or(ip4addr,cidr4)' \
'src_ips_forward:or(ip4addr,cidr4)' \
'src_ips_checkdst:or(ip4addr,cidr4)' \
'dst_ips_bypass_file:file' \
'dst_ips_bypass:or(ip4addr,cidr4)' \
'dst_ips_forward_file:file' \
'dst_ips_forward:or(ip4addr,cidr4)' \
'src_default:or("bypass", "forward", "checkdst"):checkdst' \
'dst_default:or("bypass", "forward"):bypass' \
'local_default:or("bypass", "forward", "checkdst"):bypass' \
'dst_forward_recentrst:bool:0' \
'ifnames:maxlength(15)' \
'ipt_args:string'
}
validate_ss_server_section() {
validate_common_server_options_ ss_server "$1" \
validate_common_options_ \
"${2}" \
'bind_address:ipaddr'
}
validate_ss_tunnel_section() {
validate_common_client_options_ ss_tunnel "$1" \
"${2}" \
'tunnel_address:regex(".+\:[0-9]+")'
}