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init: deduplicate shell code

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bol-van
2022-02-16 15:46:29 +03:00
parent 717b337291
commit 5a1ca8d481
5 changed files with 409 additions and 589 deletions
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342
init.d/sysv/functions
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@@ -98,245 +98,52 @@ IPSET_EXCLUDE="-m set ! --match-set nozapret"
IPSET_EXCLUDE6="-m set ! --match-set nozapret6"
# there's no route_localnet for ipv6
# the best we can is to route to link local of the incoming interface
# OUTPUT - can DNAT to ::1
# PREROUTING - can't DNAT to ::1. can DNAT to link local of -i interface or to any global addr
# not a good idea to expose tpws to the world (bind to ::)
dnat6_target()
{
# $1 - lan network name
# $2 - var to store target ip6
# get target ip address for DNAT. prefer link locals
# tpws should be as inaccessible from outside as possible
# link local address can appear not immediately after ifup
# DNAT6_TARGET=- means attempt was made but address was not found (to avoid multiple re-attempts)
local DNAT6_TARGET DVAR=DNAT6_TARGET_$1
DVAR=$(echo $DVAR | sed 's/[^a-zA-Z0-9_]/_/g')
eval DNAT6_TARGET="\$$DVAR"
[ -n "$2" ] && eval $2=''
[ -n "$DNAT6_TARGET" ] || {
local ct=0
while
DNAT6_TARGET=$(get_ipv6_linklocal $1)
[ -n "$DNAT6_TARGET" ] && break
[ "$ct" -ge "$LINKLOCAL_WAIT_SEC" ] && break
echo $1: waiting for the link local for another $(($LINKLOCAL_WAIT_SEC - $ct)) seconds ...
ct=$(($ct+1))
sleep 1
do :; done
[ -n "$DNAT6_TARGET" ] || {
echo $1: no link local. getting global
DNAT6_TARGET=$(get_ipv6_global $1)
[ -n "$DNAT6_TARGET" ] || {
echo $1: could not get any address
DNAT6_TARGET=-
}
}
eval $DVAR="$DNAT6_TARGET"
}
[ -n "$2" ] && eval $2="$DNAT6_TARGET"
_dnat6_target "$@"
}
set_route_localnet()
{
# $1 - 1 = enable, 0 = disable
[ "$DISABLE_IPV4" = "1" ] || {
local lan
for lan in $IFACE_LAN ; do
sysctl -q -w net.ipv4.conf.$lan.route_localnet=$1
done
}
}
prepare_route_localnet()
{
set_route_localnet 1
}
unprepare_route_localnet()
{
set_route_localnet 0
}
prepare_tpws_fw4()
{
# otherwise linux kernel will treat 127.0.0.0/8 as "martian" ip and refuse routing to it
# NOTE : kernels <3.6 do not have this feature. consider upgrading or change DNAT to REDIRECT and do not bind to 127.0.0.0/8
[ "$DISABLE_IPV4" = "1" ] || {
[ -n "$IFACE_LAN" ] && {
local lan
iptables -N input_rule_zapret 2>/dev/null
iptables -F input_rule_zapret
iptables -A input_rule_zapret -d $TPWS_LOCALHOST4 -j RETURN
iptables -A input_rule_zapret -d 127.0.0.0/8 -j DROP
ipt INPUT ! -i lo -j input_rule_zapret
prepare_route_localnet
}
}
}
unprepare_tpws_fw4()
{
[ "$DISABLE_IPV4" = "1" ] || {
[ -n "$IFACE_LAN" ] && {
local lan
unprepare_route_localnet
ipt_del INPUT ! -i lo -j input_rule_zapret
iptables -F input_rule_zapret 2>/dev/null
iptables -X input_rule_zapret 2>/dev/null
}
}
}
unprepare_tpws_fw()
{
unprepare_tpws_fw4
_set_route_localnet $1 "$IFACE_LAN"
}
ipt_print_op()
{
if [ "$1" = "1" ]; then
echo "Adding ip$4tables rule for $3 : $2"
else
echo "Deleting ip$4tables rule for $3 : $2"
fi
}
fw_tpws4()
{
# $1 - 1 - add, 0 - del
# $2 - iptable filter for ipv4
# $3 - tpws port
[ "$DISABLE_IPV4" = "1" ] || {
[ "$1" = 1 ] && prepare_tpws_fw4
ipt_print_op $1 "$2" "tpws (port $3)"
for lan in $IFACE_LAN ; do
ipt_add_del $1 PREROUTING -t nat -i $lan -p tcp $2 $IPSET_EXCLUDE dst -j DNAT --to $TPWS_LOCALHOST4:$3
done
if [ -n "$IFACE_WAN" ]; then
for wan in $IFACE_WAN; do
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
done
else
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
fi
}
}
fw_tpws6()
{
# $1 - 1 - add, 0 - del
# $2 - iptable filter for ipv6
# $3 - tpws port
[ "$DISABLE_IPV6" = "1" ] || {
ipt_print_op $1 "$2" "tpws (port $3)" 6
local DNAT6
for lan in $IFACE_LAN ; do
dnat6_target $lan DNAT6
[ "$DNAT6" != "-" ] && ipt6_add_del $1 PREROUTING -t nat -i $lan -p tcp $2 $IPSET_EXCLUDE6 dst -j DNAT --to [$DNAT6]:$3
done
if [ -n "$IFACE_WAN" ]; then
for wan in $IFACE_WAN; do
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
done
else
ipt6_add_del $1 OUTPUT -t nat -m owner ! --uid-owner $WS_USER -p tcp $2 $IPSET_EXCLUDE6 dst -j DNAT --to [::1]:$3
fi
}
}
fw_tpws()
{
# $1 - 1 - add, 0 - del
# $2 - iptable filter for ipv4
# $3 - iptable filter for ipv6
# $4 - tpws port
fw_tpws4 $1 "$2" $4
fw_tpws6 $1 "$3" $4
}
fw_nfqws_pre4()
{
# $1 - 1 - add, 0 - del
# $2 - iptable filter for ipv4
# $3 - queue number
[ "$DISABLE_IPV4" = "1" ] || {
ipt_print_op $1 "$2" "nfqws prerouting (qnum $3)"
if [ -n "$IFACE_WAN" ]; then
for wan in $IFACE_WAN; do
ipt_add_del $1 PREROUTING -t mangle -i $wan -p tcp $2 $IPSET_EXCLUDE src -j NFQUEUE --queue-num $3 --queue-bypass
done
else
ipt_add_del $1 PREROUTING -t mangle -p tcp $2 $IPSET_EXCLUDE src -j NFQUEUE --queue-num $3 --queue-bypass
fi
}
}
fw_nfqws_pre6()
{
# $1 - 1 - add, 0 - del
# $2 - iptable filter for ipv6
# $3 - queue number
[ "$DISABLE_IPV6" = "1" ] || {
ipt_print_op $1 "$2" "nfqws prerouting (qnum $3)" 6
if [ -n "$IFACE_WAN" ]; then
for wan in $IFACE_WAN; do
ipt6_add_del $1 PREROUTING -t mangle -i $wan -p tcp $2 $IPSET_EXCLUDE6 src -j NFQUEUE --queue-num $3 --queue-bypass
done
else
ipt6_add_del $1 PREROUTING -t mangle -p tcp $2 $IPSET_EXCLUDE6 src -j NFQUEUE --queue-num $3 --queue-bypass
fi
}
}
fw_nfqws_pre()
{
# $1 - 1 - add, 0 - del
# $2 - iptable filter for ipv4
# $3 - iptable filter for ipv6
# $4 - queue number
fw_nfqws_pre4 $1 "$2" $4
fw_nfqws_pre6 $1 "$3" $4
}
fw_nfqws_post4()
{
# $1 - 1 - add, 0 - del
# $2 - iptable filter for ipv4
# $3 - queue number
[ "$DISABLE_IPV4" = "1" ] || {
ipt_print_op $1 "$2" "nfqws postrouting (qnum $3)"
if [ -n "$IFACE_WAN" ]; then
for wan in $IFACE_WAN; do
ipt_add_del $1 POSTROUTING -t mangle -o $wan -p tcp $2 $IPSET_EXCLUDE dst -j NFQUEUE --queue-num $3 --queue-bypass
done
else
ipt_add_del $1 POSTROUTING -t mangle -p tcp $2 $IPSET_EXCLUDE dst -j NFQUEUE --queue-num $3 --queue-bypass
fi
}
_fw_nfqws_post4 $1 "$2" $3 "$IFACE_WAN"
}
fw_nfqws_post6()
{
# $1 - 1 - add, 0 - del
# $2 - iptable filter for ipv6
# $3 - queue number
[ "$DISABLE_IPV6" = "1" ] || {
ipt_print_op $1 "$2" "nfqws postrouting (qnum $3)" 6
if [ -n "$IFACE_WAN" ]; then
for wan in $IFACE_WAN; do
ipt6_add_del $1 POSTROUTING -t mangle -o $wan -p tcp $2 $IPSET_EXCLUDE6 dst -j NFQUEUE --queue-num $3 --queue-bypass
done
else
ipt6_add_del $1 POSTROUTING -t mangle -p tcp $2 $IPSET_EXCLUDE6 dst -j NFQUEUE --queue-num $3 --queue-bypass
fi
}
_fw_nfqws_post6 $1 "$2" $3 "$IFACE_WAN"
}
fw_nfqws_post()
fw_tpws4()
{
# $1 - 1 - add, 0 - del
# $2 - iptable filter for ipv4
# $3 - iptable filter for ipv6
# $4 - queue number
fw_nfqws_post4 $1 "$2" $4
fw_nfqws_post6 $1 "$3" $4
_fw_tpws4 $1 "$2" $3 "$IFACE_LAN" "$IFACE_WAN"
}
fw_tpws6()
{
_fw_tpws6 $1 "$2" $3 "$IFACE_LAN" "$IFACE_WAN"
}
nft_fw_tpws4()
{
_nft_fw_tpws4 "$1" $2 "$IFACE_WAN"
}
nft_fw_tpws6()
{
_nft_fw_tpws6 "$1" $2 "$IFACE_LAN" "$IFACE_WAN"
}
nft_fw_nfqws_post4()
{
_nft_fw_nfqws_post4 "$1" $2 "$IFACE_WAN"
}
nft_fw_nfqws_post6()
{
_nft_fw_nfqws_post6 "$1" $2 "$IFACE_WAN"
}
nft_fill_ifsets_overload()
{
nft_fill_ifsets "$IFACE_LAN" "$IFACE_WAN" "$IFACE_WAN"
}
filter_apply_hostlist_target()
{
@@ -520,90 +327,3 @@ zapret_stop_daemons()
zapret_do_daemons 0 "$@"
}
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
}