mirror of
https://github.com/springzfx/cgproxy.git
synced 2026-01-07 13:07:56 +08:00
163 lines
6.0 KiB
Bash
163 lines
6.0 KiB
Bash
#!/bin/bash
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print_help(){
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cat << 'DOC'
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#############################################################################
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#
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# 1. This script need cgroup v2
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#
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# 2. Listening port is expected to accept iptables TPROXY, while REDIRECT
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# will not work in this script, because REDIRECT only support tcp/ipv4
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#
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# 3. TPROXY need root or special capability whatever process is listening on port
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# v2ray as example:
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# sudo setcap "cap_net_bind_service=+ep cap_net_admin=+ep" /usr/lib/v2ray/v2ray
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#
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# 4. this script will proxy anything running in specific cgroup
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#
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# script usage:
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# cgroup-tproxy.sh [--help|--config|stop]
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# --config=FILE
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# load config from file
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# --help
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# show help info
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# stop
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# clean then stop
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#
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# proxy usage:
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# cgproxy <program>
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#
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#############################################################################
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DOC
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}
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## any process in this cgroup will be proxied
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cgroup_proxy="/proxy.slice"
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cgroup_noproxy="/noproxy.slice"
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## some variables
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port=12345
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enable_tcp=true
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enable_udp=true
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enable_ipv4=true
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enable_ipv6=true
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enable_dns=true
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## do not modify this if you don't known what you are doing
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table=100
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mark_proxy=0x01
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mark_noproxy=0xff
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make_newin=0x02
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## cgroup things
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# cgroup_mount_point=$(findmnt -t cgroup,cgroup2 -n -J|jq '.filesystems[0].target')
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# cgroup_type=$(findmnt -t cgroup,cgroup2 -n -J|jq '.filesystems[0].fstype')
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cgroup_mount_point=$(findmnt -t cgroup2 -n |cut -d' ' -f 1)
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cgroup_type="cgroup2"
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cgroup_procs_file="cgroup.procs"
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## parse parameter
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for i in "$@"
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do
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case $i in
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stop)
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iptables -t mangle -F
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iptables -t mangle -X TPROXY_PRE
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iptables -t mangle -X TPROXY_OUT
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ip6tables -t mangle -F
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ip6tables -t mangle -X TPROXY_PRE
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ip6tables -t mangle -X TPROXY_OUT
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ip rule delete fwmark $mark_proxy lookup $table
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ip route flush table $table
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ip -6 rule delete fwmark $mark_proxy lookup $table
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ip -6 route flush table $table
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iptables -t nat -A OUTPUT -F
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ip6tables -t nat -A OUTPUT -F
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exit 0
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;;
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--config=*)
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config=${i#*=}
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source $config
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shift
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;;
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--help)
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print_help
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exit 0
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;;
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esac
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done
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## TODO cgroup need to exists before using in iptables since 5.6.5, maybe it's bug
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test -d $cgroup_mount_point$cgroup_proxy || mkdir $cgroup_mount_point$cgroup_proxy || exit -1;
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test -d $cgroup_mount_point$cgroup_noproxy || mkdir $cgroup_mount_point$cgroup_noproxy || exit -1;
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## use TPROXY
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#ipv4#
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ip rule add fwmark $mark_proxy table $table
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ip route add local default dev lo table $table
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iptables -t mangle -N TPROXY_PRE
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iptables -t mangle -A TPROXY_PRE -p udp -m mark --mark $mark_proxy -j TPROXY --on-ip 127.0.0.1 --on-port $port --tproxy-mark $mark_proxy
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iptables -t mangle -A TPROXY_PRE -p tcp -m mark --mark $mark_proxy -j TPROXY --on-ip 127.0.0.1 --on-port $port --tproxy-mark $mark_proxy
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iptables -t mangle -A TPROXY_PRE -m conntrack --ctstate NEW -j CONNMARK --set-mark $make_newin
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iptables -t mangle -A TPROXY_PRE -m conntrack --ctstate NEW -j CONNMARK --restore-mark
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iptables -t mangle -A PREROUTING -j TPROXY_PRE
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iptables -t mangle -N TPROXY_OUT
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iptables -t mangle -A TPROXY_OUT -o lo -j RETURN
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iptables -t mangle -A TPROXY_OUT -p icmp -j RETURN
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iptables -t mangle -A TPROXY_OUT -m connmark --mark $make_newin -j RETURN # return incoming connection directly, v2ray tproxy not work for this situation, see this: https://github.com/Kr328/ClashForAndroid/issues/146
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iptables -t mangle -A TPROXY_OUT -m mark --mark $mark_noproxy -j RETURN
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iptables -t mangle -A TPROXY_OUT -m cgroup --path $cgroup_noproxy -j RETURN
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iptables -t mangle -A TPROXY_OUT -m cgroup --path $cgroup_proxy -j MARK --set-mark $mark_proxy
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iptables -t mangle -A OUTPUT -j TPROXY_OUT
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#ipv6#
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ip -6 rule add fwmark $mark_proxy table $table
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ip -6 route add local default dev lo table $table
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ip6tables -t mangle -N TPROXY_PRE
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ip6tables -t mangle -A TPROXY_PRE -p udp -m mark --mark $mark_proxy -j TPROXY --on-ip ::1 --on-port $port --tproxy-mark $mark_proxy
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ip6tables -t mangle -A TPROXY_PRE -p tcp -m mark --mark $mark_proxy -j TPROXY --on-ip ::1 --on-port $port --tproxy-mark $mark_proxy
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ip6tables -t mangle -A TPROXY_PRE -m conntrack --ctstate NEW -j CONNMARK --set-mark $make_newin
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ip6tables -t mangle -A TPROXY_PRE -m conntrack --ctstate NEW -j CONNMARK --restore-mark
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ip6tables -t mangle -A PREROUTING -j TPROXY_PRE
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ip6tables -t mangle -N TPROXY_OUT
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ip6tables -t mangle -A TPROXY_OUT -o lo -j RETURN
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ip6tables -t mangle -A TPROXY_OUT -p icmp -j RETURN
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ip6tables -t mangle -A TPROXY_OUT -m connmark --mark $make_newin -j RETURN
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ip6tables -t mangle -A TPROXY_OUT -m mark --mark $mark_noproxy -j RETURN
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ip6tables -t mangle -A TPROXY_OUT -m cgroup --path $cgroup_noproxy -j RETURN
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ip6tables -t mangle -A TPROXY_OUT -m cgroup --path $cgroup_proxy -j MARK --set-mark $mark_proxy
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ip6tables -t mangle -A OUTPUT -j TPROXY_OUT
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## use REDIRECT
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# iptables -t nat -A OUTPUT -p tcp -m cgroup --path $cgroup_proxy -j DNAT --to-destination 127.0.0.1:12345
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# ip6tables -t nat -A OUTPUT -p tcp -m cgroup --path $cgroup_proxy -j DNAT --to-destination [::1]:12345
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## allow to disable, order is important
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$enable_dns || iptables -t mangle -I TPROXY_OUT -p udp --dport 53 -j RETURN
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$enable_dns || ip6tables -t mangle -I TPROXY_OUT -p udp --dport 53 -j RETURN
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$enable_udp || iptables -t mangle -I TPROXY_OUT -p udp -j RETURN
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$enable_udp || ip6tables -t mangle -I TPROXY_OUT -p udp -j RETURN
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$enable_tcp || iptables -t mangle -I TPROXY_OUT -p tcp -j RETURN
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$enable_tcp || ip6tables -t mangle -I TPROXY_OUT -p tcp -j RETURN
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$enable_ipv4 || iptables -t mangle -I TPROXY_OUT -j RETURN
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$enable_ipv6 || ip6tables -t mangle -I TPROXY_OUT -j RETURN
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## create proxy prefix command for easy use
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# cat << 'DOC' > /usr/bin/cgproxy
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# !/usr/bin/bash
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# systemd-run -q --slice proxy.slice --scope --user $@
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# DOC
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# chmod a+x /usr/bin/cgproxy
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## message for user
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cat << DOC
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proxied cgroup: $cgroup_proxy
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DOC
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## tproxy need Root or cap_net_admin capability
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# setcap cap_net_admin+ep /usr/lib/v2ray/v2ray
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