mirror of
https://github.com/bol-van/zapret.git
synced 2024-11-12 01:39:17 +05:00
554 lines
13 KiB
Plaintext
554 lines
13 KiB
Plaintext
# init script functions library for desktop linux systems
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[ -n "$ZAPRET_BASE" ] || ZAPRET_BASE=/opt/zapret
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# SHOULD EDIT config
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. "$ZAPRET_BASE/config"
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PIDDIR=/var/run
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IPSET_CR="$ZAPRET_BASE/ipset/create_ipset.sh"
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WS_USER=tpws
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QNUM=200
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NFQWS="$ZAPRET_BASE/nfq/nfqws"
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NFQWS_OPT_BASE="--qnum=$QNUM --user=$WS_USER"
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TPPORT=988
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TPWS="$ZAPRET_BASE/tpws/tpws"
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TPWS_LOCALHOST4=127.0.0.127
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HOSTLIST="$ZAPRET_BASE/ipset/zapret-hosts.txt.gz"
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[ -f "$HOSTLIST" ] || HOSTLIST="$ZAPRET_BASE/ipset/zapret-hosts.txt"
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[ -f "$HOSTLIST" ] || HOSTLIST="$ZAPRET_BASE/ipset/zapret-hosts-user.txt"
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TPWS_OPT_BASE="--user=$WS_USER --port=$TPPORT"
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TPWS_OPT_BASE4="--bind-addr=$TPWS_LOCALHOST4"
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TPWS_OPT_BASE6="--bind-addr=::1"
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TPWS_WAIT="--bind-wait-ifup=30 --bind-wait-ip=30"
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# first wait for lan to ifup, then wait for bind-wait-ip-linklocal seconds for link local address and bind-wait-ip for any ipv6 as the worst case
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TPWS_OPT_BASE6_PRE="--bind-linklocal=prefer $TPWS_WAIT --bind-wait-ip-linklocal=3"
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[ -n "$IFACE_WAN" ] && IPT_OWAN="-o $IFACE_WAN"
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[ -n "$IFACE_WAN" ] && IPT_IWAN="-i $IFACE_WAN"
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[ -n "$IFACE_LAN" ] && IPT_ILAN="-i $IFACE_LAN"
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[ -n "$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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CUSTOM_SCRIPT="$ZAPRET_BASE/init.d/sysv/custom"
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[ -f "$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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on_off_function()
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{
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# $1 : function name on
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# $2 : function name off
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# $3 : 0 - off, 1 - on
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local F="$1"
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[ "$3" = "1" ] || F="$2"
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shift
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shift
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shift
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"$F" "$@"
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}
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ipt()
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{
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iptables -C "$@" 2>/dev/null || iptables -I "$@"
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}
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ipt_del()
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{
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iptables -C "$@" 2>/dev/null && iptables -D "$@"
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}
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ipt_add_del()
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{
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on_off_function ipt ipt_del "$@"
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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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ipt6_del()
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{
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ip6tables -C "$@" 2>/dev/null && ip6tables -D "$@"
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}
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ipt6_add_del()
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{
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on_off_function ipt6 ipt6_del "$@"
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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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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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}
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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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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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}
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iface_is_up()
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{
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# $1 - interface name
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[ -f /sys/class/net/$1/operstate ] || return
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local state
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read state </sys/class/net/$1/operstate
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[ "$state" != "down" ]
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}
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wait_ifup()
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{
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# $1 - interface name
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local ct=0
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while
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iface_is_up $1 && return
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[ "$ct" -ge "$IFUP_WAIT_SEC" ] && break
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echo waiting for ifup of $1 for another $(($IFUP_WAIT_SEC - $ct)) seconds ...
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ct=$(($ct+1))
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sleep 1
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do :; done
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false
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}
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dnat6_target()
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{
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# get target ip address for DNAT. prefer link locals
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# tpws should be as inaccessible from outside as possible
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# link local address can appear not immediately after ifup
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# DNAT6_TARGET=- means attempt was made but address was not found (to avoid multiple re-attempts)
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[ -n "$DNAT6_TARGET" ] || {
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local ct=0
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while
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DNAT6_TARGET=$(get_ipv6_linklocal $IFACE_LAN)
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[ -n "$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 $IFACE_LAN)
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[ -n "$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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prepare_tpws_fw4()
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{
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# otherwise linux kernel will treat 127.0.0.0/8 as "martian" ip and refuse routing to it
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# NOTE : kernels <3.6 do not have this feature. consider upgrading or change DNAT to REDIRECT and do not bind to 127.0.0.0/8
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[ -n "$IFACE_LAN" ] && {
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iptables -C INPUT -i $IFACE_LAN -j input_lan_rule_zapret 2>/dev/null || {
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# allow localnet route only to special tpws IP
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iptables -N input_lan_rule_zapret 2>/dev/null
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iptables -F input_lan_rule_zapret
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iptables -A input_lan_rule_zapret -d $TPWS_LOCALHOST4 -j RETURN
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iptables -A input_lan_rule_zapret -d 127.0.0.0/8 -j DROP
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iptables -I INPUT -i $IFACE_LAN -j input_lan_rule_zapret
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}
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sysctl -qw net.ipv4.conf.$IFACE_LAN.route_localnet=1
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}
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}
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unprepare_tpws_fw4()
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{
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[ -n "$IFACE_LAN" ] && {
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iptables -C INPUT -i $IFACE_LAN -j input_lan_rule_zapret 2>/dev/null && {
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sysctl -qw net.ipv4.conf.$IFACE_LAN.route_localnet=0
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iptables -D INPUT -i $IFACE_LAN -j input_lan_rule_zapret
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iptables -F input_lan_rule_zapret
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iptables -X input_lan_rule_zapret
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}
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}
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}
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unprepare_tpws_fw()
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{
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unprepare_tpws_fw4
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}
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print_op()
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{
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if [ "$1" = "1" ]; then
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echo "Adding ip$4tables rule for $3 : $2"
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else
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echo "Deleting ip$4tables rule for $3 : $2"
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fi
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}
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fw_tpws4()
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{
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# $1 - 1 - add, 0 - del
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# $2 - iptable filter for ipv4
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# $3 - tpws port
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[ "$DISABLE_IPV4" = "1" ] || {
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[ "$1" = 1 ] && prepare_tpws_fw4
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print_op $1 "$2" "tpws"
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[ -n "$IFACE_LAN" ] && {
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ipt_add_del $1 PREROUTING -t nat $IPT_ILAN -p tcp $2 $IPSET_EXCLUDE dst -j DNAT --to $TPWS_LOCALHOST4:$3
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}
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ipt_add_del $1 OUTPUT -t nat $IPT_OWAN -m owner ! --uid-owner $WS_USER -p tcp $2 $IPSET_EXCLUDE dst -j DNAT --to $TPWS_LOCALHOST4:$3
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}
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}
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fw_tpws6()
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{
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# $1 - 1 - add, 0 - del
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# $2 - iptable filter for ipv6
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# $3 - tpws port
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[ "$DISABLE_IPV6" = "1" ] || {
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print_op $1 "$2" "tpws" 6
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[ -n "$IFACE_LAN" ] && {
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dnat6_target
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[ "$DNAT6_TARGET" != "-" ] && ipt6_add_del $1 PREROUTING -t nat $IPT_ILAN -p tcp $2 $IPSET_EXCLUDE6 dst -j DNAT --to [$DNAT6_TARGET]:$3
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}
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ipt6_add_del $1 OUTPUT -t nat $IPT_OWAN -m owner ! --uid-owner $WS_USER -p tcp $2 $IPSET_EXCLUDE6 dst -j DNAT --to [::1]:$3
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}
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}
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fw_tpws()
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{
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# $1 - 1 - add, 0 - del
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# $2 - iptable filter for ipv4
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# $3 - iptable filter for ipv6
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# $4 - tpws port
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fw_tpws4 $1 "$2" $4
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fw_tpws6 $1 "$3" $4
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}
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fw_nfqws_pre4()
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{
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# $1 - 1 - add, 0 - del
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# $2 - iptable filter for ipv4
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# $3 - queue number
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[ "$DISABLE_IPV4" = "1" ] || {
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print_op $1 "$2" "nfqws prerouting"
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ipt_add_del $1 PREROUTING -t mangle $IPT_IWAN -p tcp $2 $IPSET_EXCLUDE src -j NFQUEUE --queue-num $3 --queue-bypass
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}
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}
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fw_nfqws_pre6()
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{
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# $1 - 1 - add, 0 - del
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# $2 - iptable filter for ipv6
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# $3 - queue number
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[ "$DISABLE_IPV6" = "1" ] || {
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print_op $1 "$2" "nfqws prerouting" 6
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ipt6_add_del $1 PREROUTING -t mangle $IPT_IWAN -p tcp $2 $IPSET_EXCLUDE6 src -j NFQUEUE --queue-num $3 --queue-bypass
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}
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}
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fw_nfqws_pre()
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{
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# $1 - 1 - add, 0 - del
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# $2 - iptable filter for ipv4
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# $3 - iptable filter for ipv6
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# $4 - queue number
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fw_nfqws_pre4 $1 "$2" $4
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fw_nfqws_pre6 $1 "$3" $4
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}
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fw_nfqws_post4()
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{
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# $1 - 1 - add, 0 - del
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# $2 - iptable filter for ipv4
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# $3 - queue number
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[ "$DISABLE_IPV4" = "1" ] || {
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print_op $1 "$2" "nfqws postrouting"
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ipt_add_del $1 POSTROUTING -t mangle $IPT_OWAN -p tcp $2 $IPSET_EXCLUDE dst -j NFQUEUE --queue-num $3 --queue-bypass
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}
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}
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fw_nfqws_post6()
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{
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# $1 - 1 - add, 0 - del
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# $2 - iptable filter for ipv6
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# $3 - queue number
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[ "$DISABLE_IPV6" = "1" ] || {
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print_op $1 "$2" "nfqws postrouting" 6
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ipt6_add_del $1 POSTROUTING -t mangle $IPT_OWAN -p tcp $2 $IPSET_EXCLUDE6 dst -j NFQUEUE --queue-num $3 --queue-bypass
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}
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}
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fw_nfqws_post()
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{
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# $1 - 1 - add, 0 - del
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# $2 - iptable filter for ipv4
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# $3 - iptable filter for ipv6
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# $4 - queue number
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fw_nfqws_post4 $1 "$2" $4
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fw_nfqws_post6 $1 "$3" $4
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}
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run_daemon()
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{
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# $1 - daemon number : 1,2,3,...
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# $2 - daemon
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# $3 - daemon args
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# use $PIDDIR/$DAEMONBASE$1.pid as pidfile
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local DAEMONBASE=$(basename $2)
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local PIDFILE=$PIDDIR/$DAEMONBASE$1.pid
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echo "Starting daemon $1: $2 $3"
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if exists start-stop-daemon ; then
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start-stop-daemon --start --pidfile "$PIDFILE" --background --make-pidfile --exec "$2" -- $3
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else
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if [ -f "$PIDFILE" ] && pgrep -F "$PIDFILE" "$DAEMONBASE" >/dev/null; then
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echo already running
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else
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"$2" $3 >/dev/null 2>/dev/null &
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PID=$!
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if [ -n "$PID" ]; then
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echo $PID >$PIDFILE
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else
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echo could not start daemon $1 : $2 $3
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false
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fi
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fi
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fi
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}
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stop_daemon()
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{
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# $1 - daemon number : 1,2,3,...
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# $2 - daemon
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# use $PIDDIR/$DAEMONBASE$1.pid as pidfile
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local DAEMONBASE=$(basename $2)
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local PIDFILE=$PIDDIR/$DAEMONBASE$1.pid
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echo "Stopping daemon $1: $2"
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if exists start-stop-daemon ; then
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start-stop-daemon --stop --pidfile "$PIDFILE" --exec "$2"
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else
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if [ -f "$PIDFILE" ]; then
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read PID <"$PIDFILE"
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kill $PID
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rm -f "$PIDFILE"
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else
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echo no pidfile : $PIDFILE
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fi
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fi
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}
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do_daemon()
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{
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# $1 - 1 - run, 0 - stop
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on_off_function run_daemon stop_daemon "$@"
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}
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prepare_user()
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{
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# $WS_USER is required to prevent redirection of the traffic originating from TPWS itself
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# otherwise infinite loop will occur
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# also its good idea not to run tpws as root
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id -u $WS_USER >/dev/null 2>/dev/null || useradd --no-create-home --system --shell /bin/false $WS_USER
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}
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do_tpws()
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{
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# $1 : 1 - run, 0 - stop
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# $2 : daemon number
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# $3 : daemon args
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[ "$1" = "1" ] && prepare_user
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[ "$DISABLE_IPV4" = "1" ] && [ "$DISABLE_IPV6" = "1" ] && return 0
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local OPT="$TPWS_OPT_BASE"
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[ "$DISABLE_IPV4" = "1" ] || OPT="$OPT $TPWS_OPT_BASE4"
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[ "$DISABLE_IPV6" = "1" ] || {
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OPT="$OPT $TPWS_OPT_BASE6"
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[ -n "$IFACE_LAN" ] && OPT="$OPT --bind-iface6=$IFACE_LAN $TPWS_OPT_BASE6_PRE"
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}
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do_daemon $1 $2 "$TPWS" "$OPT $3"
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}
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do_nfqws()
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{
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# $1 : 1 - run, 0 - stop
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# $2 : daemon number
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# $3 : daemon args
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[ "$1" = "1" ] && prepare_user
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do_daemon $1 $2 "$NFQWS" "$NFQWS_OPT_BASE $3"
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}
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filter_apply_port_target()
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{
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# $1 - var name of iptables filter
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local f
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if [ "$MODE_HTTP" = "1" ] && [ "$MODE_HTTPS" = "1" ]; then
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f="-m multiport --dports 80,443"
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elif [ "$MODE_HTTPS" = "1" ]; then
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f="--dport 443"
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elif [ "$MODE_HTTP" = "1" ]; then
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f="--dport 80"
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else
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echo WARNING !!! HTTP and HTTPS are both disabled
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fi
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eval $1="\"\$$1 $f\""
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}
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filter_apply_ipset_target()
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{
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# $1 - var name of ipv4 iptables filter
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# $2 - var name of ipv6 iptables filter
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if [ "$MODE_FILTER" = "ipset" ]; then
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eval $1="\"\$$1 -m set --match-set zapret dst\""
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eval $2="\"\$$2 -m set --match-set zapret6 dst\""
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fi
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}
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filter_apply_hostlist_target()
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{
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# $1 - var name of tpws or nfqws params
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[ "$MODE_FILTER" = "hostlist" ] && eval $1="\"\$$1 --hostlist=$HOSTLIST\""
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}
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tpws_apply_socks_binds()
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{
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local o
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[ "$DISABLE_IPV4" = "1" ] || {
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o="--bind-addr=127.0.0.1"
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[ -n "$IFACE_LAN" ] && o="$o --bind-iface4=$IFACE_LAN $TPWS_WAIT"
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}
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[ "$DISABLE_IPV6" = "1" ] || {
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o="$o --bind-addr=::1"
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[ -n "$IFACE_LAN" ] && o="$o --bind-iface6=$IFACE_LAN $TPWS_WAIT"
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}
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eval $1="\"\$$1 $o\""
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}
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create_ipset()
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{
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echo "Creating ipset"
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"$IPSET_CR" "$@"
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}
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zapret_do_firewall()
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{
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# $1 - 1 - add, 0 - del
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local first_packet_only="-m connbytes --connbytes-dir=original --connbytes-mode=packets --connbytes 2:4"
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local desync="-m mark ! --mark $DESYNC_MARK/$DESYNC_MARK"
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local f4 f6
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# always create ipsets. ip_exclude ipset is required
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[ "$1" != "1" ] || create_ipset no-update
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case "${MODE}" in
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tpws)
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if [ ! "$MODE_HTTP" = "1" ] && [ ! "$MODE_HTTPS" = "1" ]; then
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echo both http and https are disabled. not applying redirection.
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else
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filter_apply_port_target f4
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f6=$f4
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filter_apply_ipset_target f4 f6
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|
fw_tpws $1 "$f4" "$f6" $TPPORT
|
|
fi
|
|
;;
|
|
|
|
nfqws)
|
|
if [ ! "$MODE_HTTP" = "1" ] && [ ! "$MODE_HTTPS" = "1" ]; then
|
|
echo both http and https are disabled. not applying redirection.
|
|
else
|
|
if [ "$MODE_HTTP_KEEPALIVE" = "1" ]; then
|
|
if [ "$MODE_HTTP" = "1" ]; then
|
|
f4="--dport 80"
|
|
f6=$f4
|
|
filter_apply_ipset_target f4 f6
|
|
fw_nfqws_post $1 "$f4 $desync" "$f6 $desync" $QNUM
|
|
fi
|
|
if [ "$MODE_HTTPS" = "1" ]; then
|
|
f4="--dport 443 $first_packet_only"
|
|
f6=$f4
|
|
filter_apply_ipset_target f4 f6
|
|
fw_nfqws_post $1 "$f4 $desync" "$f6 $desync" $QNUM
|
|
fi
|
|
else
|
|
filter_apply_port_target f4
|
|
f4="$f4 $first_packet_only"
|
|
f6=$f4
|
|
filter_apply_ipset_target f4 f6
|
|
fw_nfqws_post $1 "$f4 $desync" "$f6 $desync" $QNUM
|
|
fi
|
|
fi
|
|
;;
|
|
custom)
|
|
existf zapret_custom_firewall && zapret_custom_firewall $1
|
|
;;
|
|
esac
|
|
[ "$1" = 0 ] && unprepare_tpws_fw
|
|
}
|
|
zapret_apply_firewall()
|
|
{
|
|
zapret_do_firewall 1 "$@"
|
|
}
|
|
zapret_unapply_firewall()
|
|
{
|
|
zapret_do_firewall 0 "$@"
|
|
}
|
|
|
|
zapret_do_daemons()
|
|
{
|
|
# $1 - 1 - run, 0 - stop
|
|
|
|
local opt
|
|
|
|
case "${MODE}" in
|
|
tpws)
|
|
opt="$TPWS_OPT"
|
|
filter_apply_hostlist_target opt
|
|
do_tpws $1 1 "$opt"
|
|
;;
|
|
tpws-socks)
|
|
opt="$TPWS_OPT_BASE --socks $TPWS_OPT"
|
|
tpws_apply_socks_binds opt
|
|
filter_apply_hostlist_target opt
|
|
do_daemon $1 1 "$TPWS" "$opt"
|
|
;;
|
|
nfqws)
|
|
opt="$NFQWS_OPT_DESYNC"
|
|
filter_apply_hostlist_target opt
|
|
do_nfqws $1 1 "$opt"
|
|
;;
|
|
custom)
|
|
existf zapret_custom_daemons && zapret_custom_daemons $1
|
|
;;
|
|
esac
|
|
}
|
|
|
|
zapret_run_daemons()
|
|
{
|
|
zapret_do_daemons 1 "$@"
|
|
}
|
|
zapret_stop_daemons()
|
|
{
|
|
zapret_do_daemons 0 "$@"
|
|
}
|