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219 lines
4.8 KiB
219 lines
4.8 KiB
#!/bin/sh
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usage() {
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cat <<-EOF
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Usage: ss-rules [options]
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Valid options are:
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-s <server_host> hostname or ip of shadowsocks remote server
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-l <local_port> port number of shadowsocks local server
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-i <ip_list_file> a file content is bypassed ip list
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-a <lan_ips> lan ip of access control, need a prefix to
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define access control mode
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-b <wan_ips> wan ip of will be bypassed
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-w <wan_ips> wan ip of will be forwarded
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-e <extra_options> extra options for iptables
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-o apply the rules to the OUTPUT chain
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-u enable udprelay mode, TPROXY is required
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-U enable udprelay mode, using different IP
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and ports for TCP and UDP
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-f flush the rules
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EOF
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}
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loger() {
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# 1.alert 2.crit 3.err 4.warn 5.notice 6.info 7.debug
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logger -st ss-rules[$$] -p$1 $2
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}
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ipt_n="iptables -t nat"
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ipt_m="iptables -t mangle"
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flush_r() {
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local IPT
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IPT=$(iptables-save -t nat)
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eval $(echo "$IPT" | grep "_SS_SPEC_RULE_" | \
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sed -e 's/^-A/$ipt_n -D/' -e 's/$/;/')
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for chain in $(echo "$IPT" | awk '/^:SS_SPEC/{print $1}'); do
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$ipt_n -F ${chain:1} 2>/dev/null && $ipt_n -X ${chain:1}
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done
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IPT=$(iptables-save -t mangle)
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eval $(echo "$IPT" | grep "_SS_SPEC_RULE_" | \
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sed -e 's/^-A/$ipt_m -D/' -e 's/$/;/')
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for chain in $(echo "$IPT" | awk '/^:SS_SPEC/{print $1}'); do
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$ipt_m -F ${chain:1} 2>/dev/null && $ipt_m -X ${chain:1}
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done
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ip rule del fwmark 0x01/0x01 table 100 2>/dev/null
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ip route del local 0.0.0.0/0 dev lo table 100 2>/dev/null
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ipset -X ss_spec_lan_ac 2>/dev/null
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ipset -X ss_spec_wan_ac 2>/dev/null
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return 0
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}
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ipset_r() {
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ipset -! -R <<-EOF || return 1
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create ss_spec_wan_ac hash:net
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$(echo -e "$IPLIST" | sed -e "s/^/add ss_spec_wan_ac /")
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$(for ip in $WAN_FW_IP; do echo "add ss_spec_wan_ac $ip nomatch"; done)
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EOF
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$ipt_n -N SS_SPEC_WAN_AC && \
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$ipt_n -A SS_SPEC_WAN_AC -m set --match-set ss_spec_wan_ac dst -j RETURN && \
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$ipt_n -A SS_SPEC_WAN_AC -j SS_SPEC_WAN_FW
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return $?
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}
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fw_rule() {
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$ipt_n -N SS_SPEC_WAN_FW && \
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$ipt_n -A SS_SPEC_WAN_FW -p tcp \
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-j REDIRECT --to-ports $local_port 2>/dev/null || {
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loger 3 "Can't redirect, please check the iptables."
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exit 1
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}
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return $?
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}
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ac_rule() {
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local TAG ROUTECHAIN
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if [ -n "$LAN_AC_IP" ]; then
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if [ "${LAN_AC_IP:0:1}" = "w" ]; then
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TAG="nomatch"
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else
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if [ "${LAN_AC_IP:0:1}" != "b" ]; then
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loger 3 "Bad argument \`-a $LAN_AC_IP\`."
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return 2
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fi
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fi
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fi
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ROUTECHAIN=PREROUTING
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if iptables-save -t nat | grep -q "^:zone_lan_prerouting"; then
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ROUTECHAIN=zone_lan_prerouting
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fi
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ipset -! -R <<-EOF || return 1
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create ss_spec_lan_ac hash:net
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$(for ip in ${LAN_AC_IP:1}; do echo "add ss_spec_lan_ac $ip $TAG"; done)
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EOF
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$ipt_n -A $ROUTECHAIN -p tcp $EXT_ARGS \
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-m set ! --match-set ss_spec_lan_ac src \
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-m comment --comment "_SS_SPEC_RULE_" -j SS_SPEC_WAN_AC
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if [ "$OUTPUT" = 1 ]; then
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$ipt_n -A OUTPUT -p tcp $EXT_ARGS \
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-m comment --comment "_SS_SPEC_RULE_" -j SS_SPEC_WAN_AC
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fi
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return $?
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}
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tp_rule() {
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[ -n "$TPROXY" ] || return 0
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ip rule add fwmark 0x01/0x01 table 100
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ip route add local 0.0.0.0/0 dev lo table 100
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$ipt_m -N SS_SPEC_TPROXY
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$ipt_m -A SS_SPEC_TPROXY -p udp -m set ! --match-set ss_spec_wan_ac dst \
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-j TPROXY --on-port $LOCAL_PORT --tproxy-mark 0x01/0x01
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$ipt_m -A PREROUTING -p udp $EXT_ARGS \
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-m set ! --match-set ss_spec_lan_ac src \
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-m comment --comment "_SS_SPEC_RULE_" -j SS_SPEC_TPROXY
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return $?
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}
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while getopts ":s:l:S:L:i:e:a:b:w:ouUf" arg; do
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case $arg in
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s)
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server=$OPTARG
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;;
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l)
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local_port=$OPTARG
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;;
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S)
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SERVER=$OPTARG
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;;
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L)
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LOCAL_PORT=$OPTARG
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;;
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i)
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IGNORE=$OPTARG
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;;
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e)
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EXT_ARGS=$OPTARG
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;;
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a)
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LAN_AC_IP=$OPTARG
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;;
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b)
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WAN_BP_IP=$(for ip in $OPTARG; do echo $ip; done)
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;;
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w)
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WAN_FW_IP=$OPTARG
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;;
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o)
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OUTPUT=1
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;;
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u)
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TPROXY=1
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;;
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U)
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TPROXY=2
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;;
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f)
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flush_r
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exit 0
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;;
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esac
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done
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if [ -z "$server" -o -z "$local_port" ]; then
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usage
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exit 2
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fi
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if [ "$TPROXY" = 1 ]; then
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SERVER=$server
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LOCAL_PORT=$local_port
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fi
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if [ "$TPROXY" = 2 ]; then
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if [ -z "$SERVER" -o -z "$LOCAL_PORT" ]; then
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loger 3 "Please use -S and -L specifies IP and port for UDP."
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fi
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fi
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if [ -f "$IGNORE" ]; then
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IGNORE_IP=$(cat $IGNORE 2>/dev/null)
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fi
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IPLIST=$(cat <<-EOF | grep -E "^([0-9]{1,3}\.){3}[0-9]{1,3}"
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$server
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$SERVER
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0.0.0.0/8
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10.0.0.0/8
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100.64.0.0/10
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127.0.0.0/8
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169.254.0.0/16
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172.16.0.0/12
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192.0.0.0/24
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192.0.2.0/24
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192.88.99.0/24
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192.168.0.0/16
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198.18.0.0/15
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198.51.100.0/24
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203.0.113.0/24
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224.0.0.0/4
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240.0.0.0/4
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255.255.255.255
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$WAN_BP_IP
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$IGNORE_IP
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EOF
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)
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flush_r && fw_rule && ipset_r && ac_rule && tp_rule
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exit $?
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