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