ss-redir.sh

#!/bin/sh

server_IP=12.34.56.78

curl 'http://ftp.apnic.net/apnic/stats/apnic/delegated-apnic-latest' | grep ipv4 | grep CN | awk -F\| '{ printf("%s/%d\n", $4, 32-log($5)/log(2)) }' > chnroute.txt

iptables -t nat -N SHADOWSOCKS  >/dev/null 2>&1 &
iptables -t nat -A SHADOWSOCKS -d $server_IP -j RETURN
iptables -t nat -A SHADOWSOCKS -d 0.0.0.0/8 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 10.0.0.0/8 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 127.0.0.0/8 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 169.254.0.0/16 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 172.16.0.0/12 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 192.168.0.0/16 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 224.0.0.0/4 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 240.0.0.0/4 -j RETURN

ipset flush
ipset create chnroute hash:net  >/dev/null 2>&1 &
cat chnroute.txt | xargs -I ip ipset add chnroute ip
rm chnroute.txt

iptables -t nat -A SHADOWSOCKS -m set --match-set chnroute dst -j RETURN
iptables -t nat -A SHADOWSOCKS -p tcp -j REDIRECT --to-ports 1080

iptables -t nat -D PREROUTING -p tcp -j SHADOWSOCKS >/dev/null 2>&1 &
iptables -t nat -D OUTPUT -p tcp -j SHADOWSOCKS >/dev/null 2>&1 &

iptables -t nat -A PREROUTING -p tcp -j SHADOWSOCKS
iptables -t nat -A OUTPUT -p tcp -j SHADOWSOCKS