mirror of
https://github.com/bol-van/zapret.git
synced 2024-11-14 18:48:33 +05:00
610 lines
15 KiB
Plaintext
610 lines
15 KiB
Plaintext
# init script functions library for desktop linux systems
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[ -n "$ZAPRET_BASE" ] || ZAPRET_BASE=/opt/zapret
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. "$ZAPRET_BASE/config"
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. "$ZAPRET_BASE/common/base.sh"
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. "$ZAPRET_BASE/common/fwtype.sh"
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. "$ZAPRET_BASE/common/queue.sh"
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. "$ZAPRET_BASE/common/linux_iphelper.sh"
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. "$ZAPRET_BASE/common/ipt.sh"
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. "$ZAPRET_BASE/common/nft.sh"
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. "$ZAPRET_BASE/common/linux_fw.sh"
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user_exists()
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{
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id -u $1 >/dev/null 2>/dev/null
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}
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useradd_compat()
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{
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# $1 - username
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# skip for readonly systems
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[ -w "/etc" ] && {
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if exists useradd ; then
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useradd --no-create-home --system --shell /bin/false $1
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elif is_linked_to_busybox adduser ; then
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# busybox has special adduser syntax
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adduser -S -H -D $1
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elif exists adduser; then
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adduser --no-create-home --system --disabled-login $1
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fi
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}
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user_exists $1
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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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user_exists $WS_USER || {
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# fallback to daemon if we cant add WS_USER
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useradd_compat $WS_USER || {
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for user in daemon nobody; do
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user_exists $user && {
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WS_USER=$user
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return 0
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}
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done
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return 1
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}
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}
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}
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# this complex user selection allows to survive in any locked/readonly/minimalistic environment
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[ -n "$WS_USER" ] || WS_USER=tpws
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if prepare_user; then
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USEROPT="--user=$WS_USER"
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else
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WS_USER=1
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USEROPT="--uid $WS_USER:$WS_USER"
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fi
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PIDDIR=/var/run
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IPSET_CR="$ZAPRET_BASE/ipset/create_ipset.sh"
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[ -n "$QNUM" ] || QNUM=200
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[ -n "$NFQWS" ] || NFQWS="$ZAPRET_BASE/nfq/nfqws"
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NFQWS_OPT_BASE="$USEROPT --dpi-desync-fwmark=$DESYNC_MARK"
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NFQWS_OPT_DESYNC_HTTP="${NFQWS_OPT_DESYNC_HTTP:-$NFQWS_OPT_DESYNC}"
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NFQWS_OPT_DESYNC_HTTPS="${NFQWS_OPT_DESYNC_HTTPS:-$NFQWS_OPT_DESYNC}"
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NFQWS_OPT_DESYNC_HTTP6="${NFQWS_OPT_DESYNC_HTTP6:-$NFQWS_OPT_DESYNC_HTTP}"
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NFQWS_OPT_DESYNC_HTTPS6="${NFQWS_OPT_DESYNC_HTTPS6:-$NFQWS_OPT_DESYNC_HTTPS}"
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[ -n "$TPPORT" ] || TPPORT=988
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[ -n "$TPWS" ] || 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="$USEROPT"
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TPWS_OPT_BASE4="--bind-addr=$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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TPWS_WAIT_SOCKS6="$TPWS_WAIT --bind-wait-ip-linklocal=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 $TPWS_WAIT --bind-wait-ip-linklocal=3"
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[ -n "$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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# 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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dnat6_target()
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{
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# $1 - lan network name
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# $2 - var to store target ip6
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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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local DNAT6_TARGET DVAR=DNAT6_TARGET_$1
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DVAR=$(echo $DVAR | sed 's/[^a-zA-Z0-9_]/_/g')
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eval DNAT6_TARGET="\$$DVAR"
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[ -n "$2" ] && eval $2=''
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[ -n "$DNAT6_TARGET" ] || {
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local ct=0
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while
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DNAT6_TARGET=$(get_ipv6_linklocal $1)
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[ -n "$DNAT6_TARGET" ] && break
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[ "$ct" -ge "$LINKLOCAL_WAIT_SEC" ] && break
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echo $1: 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 $1: no link local. getting global
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DNAT6_TARGET=$(get_ipv6_global $1)
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[ -n "$DNAT6_TARGET" ] || {
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echo $1: could not get any address
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DNAT6_TARGET=-
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}
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}
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eval $DVAR="$DNAT6_TARGET"
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}
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[ -n "$2" ] && eval $2="$DNAT6_TARGET"
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}
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set_route_localnet()
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{
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# $1 - 1 = enable, 0 = disable
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[ "$DISABLE_IPV4" = "1" ] || {
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local lan
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for lan in $IFACE_LAN ; do
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sysctl -q -w net.ipv4.conf.$lan.route_localnet=$1
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done
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}
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}
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prepare_route_localnet()
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{
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set_route_localnet 1
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}
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unprepare_route_localnet()
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{
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set_route_localnet 0
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}
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prepare_tpws_fw4()
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{
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# otherwise linux kernel will treat 127.0.0.0/8 as "martian" ip and refuse routing to it
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# NOTE : kernels <3.6 do not have this feature. consider upgrading or change DNAT to REDIRECT and do not bind to 127.0.0.0/8
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[ "$DISABLE_IPV4" = "1" ] || {
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[ -n "$IFACE_LAN" ] && {
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local lan
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iptables -N input_rule_zapret 2>/dev/null
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iptables -F input_rule_zapret
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iptables -A input_rule_zapret -d $TPWS_LOCALHOST4 -j RETURN
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iptables -A input_rule_zapret -d 127.0.0.0/8 -j DROP
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ipt INPUT ! -i lo -j input_rule_zapret
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prepare_route_localnet
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}
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}
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}
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unprepare_tpws_fw4()
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{
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[ "$DISABLE_IPV4" = "1" ] || {
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[ -n "$IFACE_LAN" ] && {
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local lan
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unprepare_route_localnet
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ipt_del INPUT ! -i lo -j input_rule_zapret
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iptables -F input_rule_zapret 2>/dev/null
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iptables -X input_rule_zapret 2>/dev/null
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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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ipt_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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ipt_print_op $1 "$2" "tpws (port $3)"
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for lan in $IFACE_LAN ; do
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ipt_add_del $1 PREROUTING -t nat -i $lan -p tcp $2 $IPSET_EXCLUDE dst -j DNAT --to $TPWS_LOCALHOST4:$3
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done
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if [ -n "$IFACE_WAN" ]; then
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for wan in $IFACE_WAN; do
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ipt_add_del $1 OUTPUT -t nat -o $wan -m owner ! --uid-owner $WS_USER -p tcp $2 $IPSET_EXCLUDE dst -j DNAT --to $TPWS_LOCALHOST4:$3
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done
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else
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ipt_add_del $1 OUTPUT -t nat -m owner ! --uid-owner $WS_USER -p tcp $2 $IPSET_EXCLUDE dst -j DNAT --to $TPWS_LOCALHOST4:$3
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fi
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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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ipt_print_op $1 "$2" "tpws (port $3)" 6
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local DNAT6
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for lan in $IFACE_LAN ; do
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dnat6_target $lan DNAT6
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[ "$DNAT6" != "-" ] && ipt6_add_del $1 PREROUTING -t nat -i $lan -p tcp $2 $IPSET_EXCLUDE6 dst -j DNAT --to [$DNAT6]:$3
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done
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if [ -n "$IFACE_WAN" ]; then
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for wan in $IFACE_WAN; do
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ipt6_add_del $1 OUTPUT -t nat -o $wan -m owner ! --uid-owner $WS_USER -p tcp $2 $IPSET_EXCLUDE6 dst -j DNAT --to [::1]:$3
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done
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else
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ipt6_add_del $1 OUTPUT -t nat -m owner ! --uid-owner $WS_USER -p tcp $2 $IPSET_EXCLUDE6 dst -j DNAT --to [::1]:$3
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fi
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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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ipt_print_op $1 "$2" "nfqws prerouting (qnum $3)"
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if [ -n "$IFACE_WAN" ]; then
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for wan in $IFACE_WAN; do
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ipt_add_del $1 PREROUTING -t mangle -i $wan -p tcp $2 $IPSET_EXCLUDE src -j NFQUEUE --queue-num $3 --queue-bypass
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done
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else
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ipt_add_del $1 PREROUTING -t mangle -p tcp $2 $IPSET_EXCLUDE src -j NFQUEUE --queue-num $3 --queue-bypass
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fi
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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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ipt_print_op $1 "$2" "nfqws prerouting (qnum $3)" 6
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if [ -n "$IFACE_WAN" ]; then
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for wan in $IFACE_WAN; do
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ipt6_add_del $1 PREROUTING -t mangle -i $wan -p tcp $2 $IPSET_EXCLUDE6 src -j NFQUEUE --queue-num $3 --queue-bypass
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done
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else
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ipt6_add_del $1 PREROUTING -t mangle -p tcp $2 $IPSET_EXCLUDE6 src -j NFQUEUE --queue-num $3 --queue-bypass
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fi
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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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ipt_print_op $1 "$2" "nfqws postrouting (qnum $3)"
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if [ -n "$IFACE_WAN" ]; then
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for wan in $IFACE_WAN; do
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ipt_add_del $1 POSTROUTING -t mangle -o $wan -p tcp $2 $IPSET_EXCLUDE dst -j NFQUEUE --queue-num $3 --queue-bypass
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done
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else
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ipt_add_del $1 POSTROUTING -t mangle -p tcp $2 $IPSET_EXCLUDE dst -j NFQUEUE --queue-num $3 --queue-bypass
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fi
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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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ipt_print_op $1 "$2" "nfqws postrouting (qnum $3)" 6
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if [ -n "$IFACE_WAN" ]; then
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for wan in $IFACE_WAN; do
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ipt6_add_del $1 POSTROUTING -t mangle -o $wan -p tcp $2 $IPSET_EXCLUDE6 dst -j NFQUEUE --queue-num $3 --queue-bypass
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done
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else
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ipt6_add_del $1 POSTROUTING -t mangle -p tcp $2 $IPSET_EXCLUDE6 dst -j NFQUEUE --queue-num $3 --queue-bypass
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fi
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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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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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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 $3"
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if exists start-stop-daemon ; then
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start-stop-daemon -S -p "$PIDFILE" -m -b -x "$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: $2"
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if exists start-stop-daemon ; then
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start-stop-daemon -K -p "$PIDFILE" -x "$2"
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else
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if [ -f "$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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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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# $3 : daemon args
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[ "$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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for lan in $IFACE_LAN; do
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OPT="$OPT --bind-iface6=$lan $TPWS_OPT_BASE6_PRE"
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done
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}
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do_daemon $1 $2 "$TPWS" "$OPT $3"
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}
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do_tpws_socks()
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{
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# $1 : 1 - run, 0 - stop
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# $2 : daemon number
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# $3 : daemon args
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[ "$DISABLE_IPV4" = "1" ] && [ "$DISABLE_IPV6" = "1" ] && return 0
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local opt="$TPWS_OPT_BASE --socks"
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tpws_apply_socks_binds opt
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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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do_daemon $1 $2 "$NFQWS" "$NFQWS_OPT_BASE $3"
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}
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tpws_apply_socks_binds()
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{
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local o
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[ "$DISABLE_IPV4" = "1" ] || o="--bind-addr=127.0.0.1"
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[ "$DISABLE_IPV6" = "1" ] || o="$o --bind-addr=::1"
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for lan in $IFACE_LAN; do
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[ "$DISABLE_IPV4" = "1" ] || o="$o --bind-iface4=$lan $TPWS_WAIT"
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[ "$DISABLE_IPV6" = "1" ] || o="$o --bind-iface6=$lan --bind-linklocal=unwanted $TPWS_WAIT_SOCKS6"
|
|
done
|
|
eval $1="\"\$$1 $o\""
|
|
}
|
|
|
|
|
|
create_ipset()
|
|
{
|
|
echo "Creating ip list table (firewall type $FWTYPE)"
|
|
"$IPSET_CR" "$@"
|
|
}
|
|
|
|
|
|
zapret_do_daemons()
|
|
{
|
|
# $1 - 1 - run, 0 - stop
|
|
|
|
local opt qn qns qn6 qns6
|
|
|
|
case "${MODE_OVERRIDE:-$MODE}" in
|
|
tpws)
|
|
opt="--port=$TPPORT $TPWS_OPT"
|
|
filter_apply_hostlist_target opt
|
|
do_tpws $1 1 "$opt"
|
|
;;
|
|
tpws-socks)
|
|
opt="--port=$TPPORT $TPWS_OPT"
|
|
filter_apply_hostlist_target opt
|
|
do_tpws_socks $1 1 "$opt"
|
|
;;
|
|
nfqws)
|
|
get_nfqws_qnums qn qns qn6 qns6
|
|
[ -z "$qn" ] || {
|
|
opt="--qnum=$qn $NFQWS_OPT_DESYNC_HTTP"
|
|
filter_apply_hostlist_target opt
|
|
do_nfqws $1 1 "$opt"
|
|
}
|
|
[ -z "$qns" ] || [ "$qns" = "$qn" ] || {
|
|
opt="--qnum=$qns $NFQWS_OPT_DESYNC_HTTPS"
|
|
filter_apply_hostlist_target opt
|
|
do_nfqws $1 2 "$opt"
|
|
}
|
|
[ -z "$qn6" ] || [ "$qn6" = "$qn" ] || [ "$qn6" = "$qns" ] || {
|
|
opt="--qnum=$qn6 $NFQWS_OPT_DESYNC_HTTP6"
|
|
filter_apply_hostlist_target opt
|
|
do_nfqws $1 3 "$opt"
|
|
}
|
|
[ -z "$qns6" ] || [ "$qns6" = "$qn" ] || [ "$qns6" = "$qns" ] || [ "$qns6" = "$qn6" ] || {
|
|
opt="--qnum=$qns6 $NFQWS_OPT_DESYNC_HTTPS6"
|
|
filter_apply_hostlist_target opt
|
|
do_nfqws $1 4 "$opt"
|
|
}
|
|
;;
|
|
custom)
|
|
existf zapret_custom_daemons && zapret_custom_daemons $1
|
|
;;
|
|
esac
|
|
|
|
return 0
|
|
}
|
|
zapret_run_daemons()
|
|
{
|
|
zapret_do_daemons 1 "$@"
|
|
}
|
|
zapret_stop_daemons()
|
|
{
|
|
zapret_do_daemons 0 "$@"
|
|
}
|
|
|
|
|
|
nft_fill_ifsets_overload()
|
|
{
|
|
nft_fill_ifsets "$IFACE_LAN" "$IFACE_WAN" "$IFACE_WAN"
|
|
}
|
|
|
|
nft_print_op()
|
|
{
|
|
echo "Adding nftables ipv$3 rule for $2 : $1"
|
|
}
|
|
|
|
nft_fw_tpws4()
|
|
{
|
|
# $1 - filter ipv4
|
|
# $2 - tpws port
|
|
|
|
[ "$DISABLE_IPV4" = "1" ] || {
|
|
nft_print_op "$1" "tpws (port $2)" 4
|
|
nft_add_rule dnat_output skuid != $WS_USER ${IFACE_WAN:+oifname @wanif }meta l4proto tcp $1 ip daddr != @nozapret dnat ip to $TPWS_LOCALHOST4:$2
|
|
[ -n "$IFACE_LAN" ] && {
|
|
prepare_route_localnet
|
|
nft_add_rule dnat_pre iifname @lanif meta l4proto tcp $1 ip daddr != @nozapret dnat ip to $TPWS_LOCALHOST4:$2
|
|
}
|
|
}
|
|
}
|
|
nft_fw_tpws6()
|
|
{
|
|
# $1 - filter ipv6
|
|
# $2 - tpws port
|
|
|
|
local lan DNAT6
|
|
[ "$DISABLE_IPV6" = "1" ] || {
|
|
nft_print_op "$1" "tpws (port $2)" 6
|
|
nft_add_rule dnat_output skuid != $WS_USER ${IFACE_WAN:+oifname @wanif6 }meta l4proto tcp $1 ip6 daddr != @nozapret6 dnat ip6 to [::1]:$2
|
|
for lan in $IFACE_LAN ; do
|
|
dnat6_target $lan DNAT6
|
|
[ "$DNAT6" != '-' ] && nft_add_rule dnat_pre iifname $lan meta l4proto tcp $1 ip6 daddr != @nozapret6 dnat ip6 to [$DNAT6]:$2
|
|
done
|
|
}
|
|
}
|
|
nft_fw_tpws()
|
|
{
|
|
# $1 - filter ipv4
|
|
# $2 - filter ipv6
|
|
# $3 - tpws port
|
|
|
|
nft_fw_tpws4 "$1" $3
|
|
nft_fw_tpws6 "$2" $3
|
|
}
|
|
|
|
nft_fw_nfqws_post4()
|
|
{
|
|
# $1 - filter ipv4
|
|
# $2 - queue number
|
|
|
|
local rule
|
|
|
|
[ "$DISABLE_IPV4" = "1" ] || {
|
|
nft_print_op "$1" "nfqws postrouting (qnum $2)" 4
|
|
rule="${IFACE_WAN:+oifname @wanif }meta l4proto tcp $1 ip daddr != @nozapret"
|
|
nft_add_rule postrouting $rule queue num $2 bypass
|
|
nft_add_nfqws_flow_exempt_rule "$rule"
|
|
}
|
|
}
|
|
nft_fw_nfqws_post6()
|
|
{
|
|
# $1 - filter ipv6
|
|
# $2 - queue number
|
|
|
|
local rule
|
|
|
|
[ "$DISABLE_IPV6" = "1" ] || {
|
|
nft_print_op "$1" "nfqws postrouting (qnum $2)" 6
|
|
rule="${IFACE_WAN:+oifname @wanif6 }meta l4proto tcp $1 ip6 daddr != @nozapret6"
|
|
nft_add_rule postrouting $rule queue num $2 bypass
|
|
nft_add_nfqws_flow_exempt_rule "$rule"
|
|
}
|
|
}
|
|
nft_fw_nfqws_post()
|
|
{
|
|
# $1 - filter ipv4
|
|
# $2 - filter ipv6
|
|
# $3 - queue number
|
|
|
|
nft_fw_nfqws_post4 "$1" $3
|
|
nft_fw_nfqws_post6 "$2" $3
|
|
}
|