#!/bin/sh /etc/rc.common
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#
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# Copyright (C) 2017-2019 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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ssrules_uc="/usr/share/ss-rules/ss-rules.uc"
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ssrules_nft="/etc/nftables.d/90-ss-rules.nft"
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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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[ -z "$server" ] || json_add_string server "$server"
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json_add_int server_port "$server_port"
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[ -z "$method" ] || json_add_string method "$method"
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[ -z "$key" ] || json_add_string key "$key"
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[ -z "$password" ] || json_add_string password "$password"
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[ -z "$plugin" ] || json_add_string plugin "$plugin"
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[ -z "$plugin_opts" ] || json_add_string plugin_opts "$plugin_opts"
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}
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ss_mkjson_ss_local_conf() {
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ss_mkjson_server_conf
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}
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ss_mkjson_ss_redir_conf() {
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ss_mkjson_server_conf
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}
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ss_mkjson_ss_server_conf() {
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ss_mkjson_server_conf_
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}
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ss_mkjson_ss_tunnel_conf() {
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ss_mkjson_server_conf || return 1
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[ -n "$tunnel_address" ] || return 1
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json_add_string tunnel_address "$tunnel_address"
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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
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[ "$disabled" = 0 ] || return
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json_init
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ss_mkjson_${cfgtype}_conf || return
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json_add_boolean use_syslog 1
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json_add_boolean ipv6_first "$ipv6_first"
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json_add_boolean fast_open "$fast_open"
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json_add_boolean reuse_port "$reuse_port"
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json_add_boolean no_delay "$no_delay"
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[ -z "$local_address" ] || json_add_string local_address "$local_address"
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[ -z "$local_port" ] || json_add_int local_port "$local_port"
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[ -z "$local_ipv4_address" ] || json_add_string local_ipv4_address "$local_ipv4_address"
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[ -z "$local_ipv6_address" ] || json_add_string local_ipv6_address "$local_ipv6_address"
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[ -z "$mode" ] || json_add_string mode "$mode"
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[ -z "$mtu" ] || json_add_int mtu "$mtu"
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[ -z "$timeout" ] || json_add_int timeout "$timeout"
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[ -z "$user" ] || json_add_string user "$user"
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json_dump -i >"$confjson"
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procd_open_instance "$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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if [ -n "$bind_address" ]; then
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echo "$cfgtype $cfg: uci option bind_address deprecated, please switch to local_address" >&2
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procd_append_param command -b "$bind_address"
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fi
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procd_set_param file "$confjson"
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procd_set_param respawn
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procd_close_instance
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ss_rules_cb
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}
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ss_rules_cb() {
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local cfgserver server
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if [ "$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=$local_port"
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fi
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fi
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}
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ss_rules() {
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local cfg="ss_rules"
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local cfgtype
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local local_port_tcp local_port_udp
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local remote_servers
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[ -s "$ssrules_uc" ] || 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 0
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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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remote_servers="$(echo $ss_redir_servers \
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| tr ' ' '\n' \
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| sort -u \
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| xargs -n 1 resolveip \
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| sort -u)"
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local tmp="/tmp/ssrules"
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json_init
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json_add_string o_remote_servers "$remote_servers"
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json_add_int o_redir_tcp_port "$local_port_tcp"
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json_add_int o_redir_udp_port "$local_port_udp"
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json_add_string o_ifnames "$ifnames"
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json_add_string o_local_default "$local_default"
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json_add_string o_src_bypass "$src_ips_bypass"
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json_add_string o_src_forward "$src_ips_forward"
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json_add_string o_src_checkdst "$src_ips_checkdst"
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json_add_string o_src_default "$src_default"
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json_add_string o_dst_bypass "$dst_ips_bypass"
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json_add_string o_dst_forward "$dst_ips_forward"
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json_add_string o_dst_bypass_file "$dst_ips_bypass_file"
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json_add_string o_dst_forward_file "$dst_ips_forward_file"
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json_add_string o_dst_default "$dst_default"
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json_add_string o_nft_tcp_extra "$nft_tcp_extra"
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json_add_string o_nft_udp_extra "$nft_udp_extra"
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json_dump -i >"$tmp.json"
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if ucode -S -i "$ssrules_uc" -E "$tmp.json" >"$tmp.nft" \
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&& ! cmp -s "$tmp.nft" "$ssrules_nft"; then
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echo "table inet chk {include \"$tmp.nft\";}" >"$tmp.nft.chk"
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if nft -f "$tmp.nft.chk" -c; then
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mv "$tmp.nft" "$ssrules_nft"
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fw4 reload
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fi
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rm -f "$tmp.nft.chk"
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fi
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rm -f "$tmp.json"
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rm -f "$tmp.nft"
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}
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start_service() {
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local cfgtype
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mkdir -p "$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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if [ -f "$ssrules_nft" ]; then
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rm -f "$ssrules_nft"
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fw4 reload
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fi
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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, $aead_methods)" \
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'plugin:string' \
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'plugin_opts:string'
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}
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validate_common_client_options_() {
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validate_common_options_ "$@" \
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'server:uci("shadowsocks-libev", "@server")' \
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'local_address:ipaddr: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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'no_delay: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" "$2"
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}
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validate_ss_rules_section() {
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"${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:or(ipaddr,cidr)' \
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'src_ips_forward:or(ipaddr,cidr)' \
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'src_ips_checkdst:or(ipaddr,cidr)' \
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'dst_ips_bypass_file:file' \
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'dst_ips_bypass:or(ipaddr,cidr)' \
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'dst_ips_forward_file:file' \
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'dst_ips_forward:or(ipaddr,cidr)' \
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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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'nft_tcp_extra:string' \
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'nft_udp_extra:string' \
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'ifnames:maxlength(15)'
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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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'local_address:ipaddr' \
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'local_ipv4_address:ip4addr' \
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'local_ipv6_address:ip6addr' \
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'bind_address:ipaddr'
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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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