mirror of
https://github.com/bol-van/zapret.git
synced 2025-04-19 21:42:59 +03:00
321 lines
8.5 KiB
Plaintext
321 lines
8.5 KiB
Plaintext
. /lib/functions/network.sh
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[ -n "$ZAPRET_BASE" ] || ZAPRET_BASE=/opt/zapret
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. "$ZAPRET_BASE/config"
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QNUM=200
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TPPORT_HTTP=1188
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TPPORT_HTTPS=1189
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TPWS_USER=daemon
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[ -n "$DESYNC_MARK" ] || DESYNC_MARK=0x40000000
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# max wait time for the link local ipv6 on the LAN interface
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LINKLOCAL_WAIT_SEC=5
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IPSET_CR="$ZAPRET_BASE/ipset/create_ipset.sh"
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CUSTOM_SCRIPT="$ZAPRET_BASE/init.d/openwrt/custom"
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[ -f "$CUSTOM_SCRIPT" ] && . "$CUSTOM_SCRIPT"
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IPSET_EXCLUDE="-m set ! --match-set nozapret"
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IPSET_EXCLUDE6="-m set ! --match-set nozapret6"
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exists()
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{
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which "$1" >/dev/null 2>/dev/null
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}
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existf()
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{
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type "$1" >/dev/null 2>/dev/null
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}
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# can be multiple ipv6 outgoing interfaces
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# uplink from isp, tunnelbroker, vpn, ...
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# want them all. who knows what's the real one that blocks sites
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# dont want any manual configuration - want to do it automatically
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# standard network_find_wan[6] return only the first
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# we use low level function from network.sh to avoid this limitation
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# it can change theoretically and stop working
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network_find_wan_all()
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{
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__network_ifstatus "$1" "" "[@.route[@.target='0.0.0.0' && !@.table]].interface" "" 10 2>/dev/null && return
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network_find_wan $1
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}
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network_find_wan6_all()
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{
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__network_ifstatus "$1" "" "[@.route[@.target='::' && !@.table]].interface" "" 10 2>/dev/null && return
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network_find_wan6 $1
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}
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ipt()
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{
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iptables -C "$@" 2>/dev/null || iptables -I "$@"
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}
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ipt6()
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{
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ip6tables -C "$@" 2>/dev/null || ip6tables -I "$@"
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}
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# there's no route_localnet for ipv6
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# the best we can is to route to link local of the incoming interface
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# OUTPUT - can DNAT to ::1
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# PREROUTING - can't DNAT to ::1. can DNAT to link local of -i interface or to any global addr
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# not a good idea to expose tpws to the world (bind to ::)
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get_ipv6_linklocal()
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{
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# $1 - interface name. if empty - any interface
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if exists ip ; then
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local dev
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[ -n "$1" ] && dev="dev $1"
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ip addr show $dev | sed -e 's/^.*inet6 \([^ ]*\)\/[0-9]* scope link.*$/\1/;t;d' | head -n 1
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else
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ifconfig $1 | sed -re 's/^.*inet6 addr: ([^ ]*)\/[0-9]* Scope:Link.*$/\1/;t;d' | head -n 1
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fi
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}
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get_ipv6_global()
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{
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# $1 - interface name. if empty - any interface
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if exists ip ; then
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local dev
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[ -n "$1" ] && dev="dev $1"
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ip addr show $dev | sed -e 's/^.*inet6 \([^ ]*\)\/[0-9]* scope global.*$/\1/;t;d' | head -n 1
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else
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ifconfig $1 | sed -re 's/^.*inet6 addr: ([^ ]*)\/[0-9]* Scope:Global.*$/\1/;t;d' | head -n 1
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fi
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}
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dnat6_target()
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{
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# get target ip address for DNAT. prefer link locals
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# tpws should be as inaccessible from outside as possible
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# link local address can appear not immediately after ifup
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# DNAT6_TARGET=- means attempt was made but address was not found (to avoid multiple re-attempts)
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[ -n "$DNAT6_TARGET" ] || {
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# no reason to query if its down
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network_is_up lan || return
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local DEVICE
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network_get_device DEVICE lan
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local ct=0
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while
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DNAT6_TARGET=$(get_ipv6_linklocal $DEVICE)
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[ -n "$DNAT6_TARGET" ] && break
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[ "$ct" -ge "$LINKLOCAL_WAIT_SEC" ] && break
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echo waiting for the link local for another $(($LINKLOCAL_WAIT_SEC - $ct)) seconds ...
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ct=$(($ct+1))
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sleep 1
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do :; done
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[ -n "$DNAT6_TARGET" ] || {
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echo no link local. getting global
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DNAT6_TARGET=$(get_ipv6_global $DEVICE)
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[ -n "$DNAT6_TARGET" ] || {
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echo could not get any address
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DNAT6_TARGET=-
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}
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}
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}
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}
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fw_nfqws_pre4()
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{
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# $1 - filter ipv4
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# $2 - queue number
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local DEVICE wan_iface
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[ "$DISABLE_IPV4" = "1" ] || {
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network_find_wan_all wan_iface
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for ext_iface in $wan_iface; do
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network_get_device DEVICE $ext_iface
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ipt PREROUTING -t mangle -i $DEVICE -p tcp $1 $IPSET_EXCLUDE src -j NFQUEUE --queue-num $2 --queue-bypass
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done
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}
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}
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fw_nfqws_pre6()
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{
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# $1 - filter ipv6
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# $2 - queue number
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local DEVICE wan_iface
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[ "$DISABLE_IPV6" = "1" ] || {
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network_find_wan6_all wan_iface
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for ext_iface in $wan_iface; do
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network_get_device DEVICE $ext_iface
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ipt6 PREROUTING -t mangle -i $DEVICE -p tcp $1 $IPSET_EXCLUDE6 src -j NFQUEUE --queue-num $2 --queue-bypass
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done
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}
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}
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fw_nfqws_pre()
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{
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# $1 - filter ipv4
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# $2 - filter ipv6
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# $3 - queue number
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fw_nfqws_pre4 "$1" $3
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fw_nfqws_pre6 "$2" $3
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}
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fw_nfqws_post4()
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{
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# $1 - filter ipv4
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# $2 - queue number
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local DEVICE wan_iface
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[ "$DISABLE_IPV4" = "1" ] || {
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network_find_wan_all wan_iface
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for ext_iface in $wan_iface; do
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network_get_device DEVICE $ext_iface
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ipt POSTROUTING -t mangle -o $DEVICE -p tcp $1 $IPSET_EXCLUDE dst -j NFQUEUE --queue-num $2 --queue-bypass
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done
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}
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}
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fw_nfqws_post6()
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{
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# $1 - filter ipv6
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# $2 - queue number
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local DEVICE wan_iface
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[ "$DISABLE_IPV6" = "1" ] || {
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network_find_wan6_all wan_iface
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for ext_iface in $wan_iface; do
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network_get_device DEVICE $ext_iface
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ipt6 POSTROUTING -t mangle -o $DEVICE -p tcp $1 $IPSET_EXCLUDE6 dst -j NFQUEUE --queue-num $2 --queue-bypass
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done
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}
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}
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fw_nfqws_post()
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{
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# $1 - filter ipv4
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# $2 - filter ipv6
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# $3 - queue number
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fw_nfqws_post4 "$1" $3
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fw_nfqws_post6 "$2" $3
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}
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IPT_OWNER="-m owner ! --uid-owner $TPWS_USER"
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fw_tpws4()
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{
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# $1 - filter ipv6
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# $2 - tpws port
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local DEVICE wan_iface
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[ "$DISABLE_IPV4" = "1" ] || {
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network_find_wan_all wan_iface
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for ext_iface in $wan_iface; do
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network_get_device DEVICE $ext_iface
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ipt OUTPUT -t nat -o $DEVICE $IPT_OWNER -p tcp $1 $IPSET_EXCLUDE dst -j DNAT --to 127.0.0.1:$2
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done
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ipt prerouting_lan_rule -t nat -p tcp $1 $IPSET_EXCLUDE dst -j DNAT --to 127.0.0.1:$2
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network_get_device DEVICE lan
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sysctl -qw net.ipv4.conf.$DEVICE.route_localnet=1
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}
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}
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fw_tpws6()
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{
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# $1 - filter ipv6
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# $2 - tpws port
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local DEVICE wan_iface
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[ "$DISABLE_IPV6" = "1" ] || {
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network_find_wan6_all wan_iface
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for ext_iface in $wan_iface; do
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network_get_device DEVICE $ext_iface
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ipt6 OUTPUT -t nat -o $DEVICE $IPT_OWNER -p tcp $1 $IPSET_EXCLUDE6 dst -j DNAT --to [::1]:$2
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done
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network_get_device DEVICE lan
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dnat6_target
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[ "$DNAT6_TARGET" != "-" ] && ipt6 PREROUTING -t nat -i $DEVICE -p tcp $1 $IPSET_EXCLUDE6 dst -j DNAT --to [$DNAT6_TARGET]:$2
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}
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}
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fw_tpws()
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{
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# $1 - filter ipv4
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# $2 - filter ipv6
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# $3 - tpws port
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fw_tpws4 "$1" $3
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fw_tpws6 "$2" $3
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}
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create_ipset()
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{
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echo "Creating ipset"
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"$IPSET_CR" "$@"
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}
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zapret_apply_firewall()
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{
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local rule
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local synack="--tcp-flags SYN,ACK SYN,ACK"
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local ipset_zapret="-m set --match-set zapret"
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local ipset_zapret6="-m set --match-set zapret6"
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local desync="-m multiport --dports 80,443 -m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 2:4 -m mark ! --mark $DESYNC_MARK/$DESYNC_MARK"
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# always create ipsets. ip_exclude ipset is required
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create_ipset no-update
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case "${MODE}" in
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tpws_hostlist|tpws_all)
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fw_tpws "--dport 80" "--dport 80" $TPPORT_HTTP
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;;
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tpws_ipset)
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fw_tpws "--dport 80 $ipset_zapret dst" "--dport 80 $ipset_zapret6 dst" $TPPORT_HTTP
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;;
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tpws_ipset_https)
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fw_tpws "--dport 80 $ipset_zapret dst" "--dport 80 $ipset_zapret6 dst" $TPPORT_HTTP
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fw_tpws "--dport 443 $ipset_zapret dst" "--dport 443 $ipset_zapret6 dst" $TPPORT_HTTPS
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;;
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tpws_all_https)
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fw_tpws "--dport 80" "--dport 80" $TPPORT_HTTP
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fw_tpws "--dport 443" "--dport 443" $TPPORT_HTTPS
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;;
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nfqws_ipset)
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fw_nfqws_pre "--sport 80 $synack $ipset_zapret src" "--sport 80 $synack $ipset_zapret6 src" $QNUM
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fw_nfqws_post "--dport 80 $ipset_zapret dst" "--dport 80 $ipset_zapret6 dst" $QNUM
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;;
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nfqws_ipset_https)
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rule="-m multiport --sports 80,443 $synack"
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fw_nfqws_pre "$rule $ipset_zapret src" "$rule $ipset_zapret6 src" $QNUM
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fw_nfqws_post "--dport 80 $ipset_zapret dst" "--dport 80 $ipset_zapret6 dst" $QNUM
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;;
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nfqws_all)
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fw_nfqws_pre "--sport 80 $synack" "--sport 80 $synack" $QNUM
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fw_nfqws_post "--dport 80" "--dport 80" $QNUM
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;;
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nfqws_all_https)
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rule="-m multiport --sports 80,443 $synack"
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fw_nfqws_pre "$rule" "$rule" $QNUM
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fw_nfqws_post "--dport 80" "--dport 80" $QNUM
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;;
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nfqws_all_desync|nfqws_hostlist_desync)
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rule="-m multiport --sports 80,443 $synack"
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fw_nfqws_pre "$rule" "$rule" $QNUM
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fw_nfqws_post "$desync" "$desync" $QNUM
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;;
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nfqws_ipset_desync)
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rule="-m multiport --sports 80,443 $synack"
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fw_nfqws_pre "$rule $ipset_zapret src" "$rule $ipset_zapret6 src" $QNUM
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fw_nfqws_post "$desync $ipset_zapret dst" "$desync $ipset_zapret6 dst" $QNUM
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;;
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custom)
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existf zapret_custom_firewall && zapret_custom_firewall
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;;
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esac
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}
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