OpenWrt ShadowSocks Traffic Redirection Rules

README.md

ss-rules

使用 ipset -R OR iptables-restore 添加规则

优先使用 ipset, 其在流量转发时匹配效率相对 iptables 要高

测试 ss-rules 在 ignore.list 包含 4747 条 IP 的执行用时:

# time /usr/bin/ss-rules -c $CONFIG -i $IGNORE
real    0m 1.34s
user    0m 1.03s
sys     0m 0.30s

• ignore.list

• GitHub

• IPK Download

shadowsocks

#!/bin/sh /etc/rc.common

START=95

SERVICE_USE_PID=1
SERVICE_WRITE_PID=1
SERVICE_DAEMONIZE=1

CONFIG=/etc/shadowsocks/config.json
IGNORE=/etc/shadowsocks/ignore.list

start() {
	/usr/bin/ss-rules -c $CONFIG -i $IGNORE && \
	service_start /usr/bin/ss-redir -c $CONFIG
}

stop() {
	service_stop /usr/bin/ss-redir && \
	/etc/init.d/firewall restart>/dev/null 2>&1
}

ss-rules

#!/bin/sh

# Get argument
while getopts ":c:i:" arg; do
	case $arg in
		c) CONFIG=$OPTARG
		;;
		i) IGNORE=$OPTARG
		;;
	esac
done

# Check ignore list file
if [ -n "$IGNORE" ] && [ -f "$IGNORE" ]; then
	LOAD=1
fi

# Check configuration file
if [ -n "$CONFIG" ] && [ -f "$CONFIG" ]; then
	eval $(awk -F'[,:]' '{
		for (i=1; i<=NF; i++) {
			if ($i ~ /"server"/) {
				printf("server=%s;", $(i+1))
			}
			if ($i ~ /"local_port"/) {
				printf("local_port=%s;", $(i+1))
			}
		}
	}' $CONFIG | tr -d '" ')
fi

# Check parameters
if [ -z "$server" ] || [ -z "$local_port" ]; then
	echo "Invalid configuration file."
	exit 128
fi

# Use iptables
iptab_r() {
	HEAD="*nat\n\
:SHADOWSOCKS - [0:0]\n\
-A PREROUTING -p tcp -j SHADOWSOCKS\n\
-A SHADOWSOCKS -d $server/32 -j RETURN\n\
-A SHADOWSOCKS -d 0.0.0.0/8 -j RETURN\n\
-A SHADOWSOCKS -d 10.0.0.0/8 -j RETURN\n\
-A SHADOWSOCKS -d 127.0.0.0/8 -j RETURN\n\
-A SHADOWSOCKS -d 169.254.0.0/16 -j RETURN\n\
-A SHADOWSOCKS -d 172.16.0.0/12 -j RETURN\n\
-A SHADOWSOCKS -d 192.168.0.0/16 -j RETURN\n\
-A SHADOWSOCKS -d 224.0.0.0/4 -j RETURN\n\
-A SHADOWSOCKS -d 240.0.0.0/4 -j RETURN\n"
	TAIL="\n\
-A SHADOWSOCKS -p tcp -j REDIRECT --to-ports $local_port\n\
COMMIT"

	# Read the ignore list
	if [ -n "$LOAD" ]; then
		BODY=$(awk '$1 ~ /^([0-9]{1,3}\.){3}[0-9]{1,3}/ {
			printf("-A SHADOWSOCKS -d %s -j RETURN\n", $1)
		}' $IGNORE)
	fi

	# Apply the rules
	/etc/init.d/firewall restart>/dev/null 2>&1
	echo -e "$HEAD$BODY$TAIL" | iptables-restore -n

	exit $?
}

# Use ipset
ipset_r() {
	HEAD="create shadowsocks hash:net\n\
add shadowsocks $server\n\
add shadowsocks 0.0.0.0/8\n\
add shadowsocks 10.0.0.0/8\n\
add shadowsocks 127.0.0.0/8\n\
add shadowsocks 169.254.0.0/16\n\
add shadowsocks 172.16.0.0/12\n\
add shadowsocks 192.168.0.0/16\n\
add shadowsocks 224.0.0.0/4\n\
add shadowsocks 240.0.0.0/4\n"

	# Read the ignore list
	if [ -n "$LOAD" ]; then
		BODY=$(awk '$1 ~ /^([0-9]{1,3}\.){3}[0-9]{1,3}/ {
			printf("add shadowsocks %s\n", $1)
		}' $IGNORE)
	fi

	# Apply the rules
	echo -e "$HEAD$BODY" | ipset -R && \
	iptables -t nat -A PREROUTING -p tcp \
		-m set ! --match-set shadowsocks dst \
		-j REDIRECT --to-ports $local_port

	return $?
}

# Catch error codes and select rules mode
ipset -X shadowsocks>/dev/null 2>&1
[ "$?" = 127 ] && iptab_r
ipset_r || iptab_r

exit $?