zapret/init.d/custom.d.examples.linux/50-nfqws-ipset

# this custom script demonstrates how to launch extra nfqws instance limited by ipset

# can override in config :
NFQWS_MY1_OPT="${NFQWS_MY1_OPT:--filter-udp=* --dpi-desync=fake --dpi-desync-repeats=6 --dpi-desync-any-protocol --new --filter-tcp=* --dpi-desync=multisplit}"
NFQWS_MY1_SUBNETS4="${NFQWS_MY1_SUBNETS4:-173.194.0.0/16 108.177.0.0/17 74.125.0.0/16 64.233.160.0/19 172.217.0.0/16}"
NFQWS_MY1_SUBNETS6="${NFQWS_MY1_SUBNETS6:-2a00:1450::/29}"
NFQWS_MY1_PORTS_TCP=${NFQWS_MY1_PORTS_TCP:-$NFQWS_PORTS_TCP}
NFQWS_MY1_PORTS_UDP=${NFQWS_MY1_PORTS_UDP:-$NFQWS_PORTS_UDP}
NFQWS_MY1_TCP_PKT_OUT=${NFQWS_MY1_TCP_PKT_OUT:-$NFQWS_TCP_PKT_OUT}
NFQWS_MY1_UDP_PKT_OUT=${NFQWS_MY1_UDP_PKT_OUT:-$NFQWS_UDP_PKT_OUT}
NFQWS_MY1_TCP_PKT_IN=${NFQWS_MY1_TCP_PKT_IN:-$NFQWS_TCP_PKT_IN}
NFQWS_MY1_UDP_PKT_IN=${NFQWS_MY1_UDP_PKT_IN:-$NFQWS_UDP_PKT_IN}

NFQWS_MY1_IPSET_SIZE=${NFQWS_MY1_IPSET_SIZE:-4096}
NFQWS_MY1_IPSET_OPT="${NFQWS_MY1_IPSET_OPT:-hash:net hashsize 8192 maxelem $NFQWS_MY1_IPSET_SIZE}"

alloc_dnum DNUM_NFQWS_MY1
alloc_qnum QNUM_NFQWS_MY1
NFQWS_MY1_NAME4=my1nfqws4
NFQWS_MY1_NAME6=my1nfqws6

zapret_custom_daemons()
{
	# $1 - 1 - run, 0 - stop

	local opt="--qnum=$QNUM_NFQWS_MY1 $NFQWS_MY1_OPT"
	do_nfqws $1 $DNUM_NFQWS_MY1 "$opt"
}

zapret_custom_firewall()
{
	# $1 - 1 - run, 0 - stop

	local f4 f6 subnet
	local NFQWS_MY1_PORTS_TCP=$(replace_char - : $NFQWS_MY1_PORTS_TCP)
	local NFQWS_MY1_PORTS_UDP=$(replace_char - : $NFQWS_MY1_PORTS_UDP)

	[ "$1" = 1 -a "$DISABLE_IPV4" != 1 ] && {
		ipset create $NFQWS_MY1_NAME4 $NFQWS_MY1_IPSET_OPT family inet 2>/dev/null
		ipset flush $NFQWS_MY1_NAME4
		for subnet in $NFQWS_MY1_SUBNETS4; do
			echo add $NFQWS_MY1_NAME4 $subnet
		done | ipset -! restore
	}
	[ "$1" = 1 -a "$DISABLE_IPV6" != 1 ] && {
		ipset create $NFQWS_MY1_NAME6 $NFQWS_MY1_IPSET_OPT family inet6 2>/dev/null
		ipset flush $NFQWS_MY1_NAME6
		for subnet in $NFQWS_MY1_SUBNETS6; do
			echo add $NFQWS_MY1_NAME6 $subnet
		done | ipset -! restore
	}

	[ -n "$NFQWS_MY1_PORTS_TCP" ] && {
		[ -n "$NFQWS_MY1_TCP_PKT_OUT" -a "$NFQWS_MY1_TCP_PKT_OUT" != 0 ] && {
			f4="-p tcp -m multiport --dports $NFQWS_MY1_PORTS_TCP $ipt_connbytes 1:$NFQWS_MY1_TCP_PKT_OUT -m set --match-set"
			f6="$f4 $NFQWS_MY1_NAME6 dst"
			f4="$f4 $NFQWS_MY1_NAME4 dst"
			fw_nfqws_post $1 "$f4" "$f6" $QNUM_NFQWS_MY1
		}
		[ -n "$NFQWS_MY1_TCP_PKT_IN" -a "$NFQWS_MY1_TCP_PKT_IN" != 0 ] && {
			f4="-p tcp -m multiport --sports $NFQWS_MY1_PORTS_TCP $ipt_connbytes 1:$NFQWS_MY1_TCP_PKT_IN -m set --match-set"
			f6="$f4 $NFQWS_MY1_NAME6 src"
			f4="$f4 $NFQWS_MY1_NAME4 src"
			fw_nfqws_pre $1 "$f4" "$f6" $QNUM_NFQWS_MY1
		}
	}
	[ -n "$NFQWS_MY1_PORTS_UDP" ] && {
		[ -n "$NFQWS_MY1_UDP_PKT_OUT" -a "$NFQWS_MY1_UDP_PKT_OUT" != 0 ] && {
			f4="-p udp -m multiport --dports $NFQWS_MY1_PORTS_UDP $ipt_connbytes 1:$NFQWS_MY1_UDP_PKT_OUT -m set --match-set"
			f6="$f4 $NFQWS_MY1_NAME6 dst"
			f4="$f4 $NFQWS_MY1_NAME4 dst"
			fw_nfqws_post $1 "$f4" "$f6" $QNUM_NFQWS_MY1
		}
		[ -n "$NFQWS_MY1_UDP_PKT_IN" -a "$NFQWS_MY1_UDP_PKT_IN" != 0 ] && {
			f4="-p udp -m multiport --sports $NFQWS_MY1_PORTS_UDP $ipt_connbytes 1:$NFQWS_MY1_UDP_PKT_IN -m set --match-set"
			f6="$f4 $NFQWS_MY1_NAME6 src"
			f4="$f4 $NFQWS_MY1_NAME4 src"
			fw_nfqws_pre $1 "$f4" "$f6" $QNUM_NFQWS_MY1
		}
	}

	[ "$1" = 1 ] || {
		ipset destroy $NFQWS_MY1_NAME4 2>/dev/null
		ipset destroy $NFQWS_MY1_NAME6 2>/dev/null
	}
}

zapret_custom_firewall_nft()
{
	local f4 f6 subnet
	local first_packets_only="$nft_connbytes 1-$NFQWS_MY1_PKT_OUT"

	[ "$DISABLE_IPV4" != 1 ] && {
	        make_comma_list subnets $NFQWS_MY1_SUBNETS4
		nft_create_set $NFQWS_MY1_NAME4 "type ipv4_addr; size $NFQWS_MY1_IPSET_SIZE; auto-merge; flags interval;"
		nft_flush_set $NFQWS_MY1_NAME4
		nft_add_set_element $NFQWS_MY1_NAME4 "$subnets"
	}
	[ "$DISABLE_IPV6" != 1 ] && {
	        make_comma_list subnets $NFQWS_MY1_SUBNETS6
		nft_create_set $NFQWS_MY1_NAME6 "type ipv6_addr; size $NFQWS_MY1_IPSET_SIZE; auto-merge; flags interval;"
		nft_flush_set $NFQWS_MY1_NAME6
		nft_add_set_element $NFQWS_MY1_NAME6 "$subnets"
	}

	[ -n "$NFQWS_MY1_PORTS_TCP" ] && {
		[ -n "$NFQWS_MY1_TCP_PKT_OUT" -a "$NFQWS_MY1_TCP_PKT_OUT" != 0 ] && {
			f4="tcp dport {$NFQWS_MY1_PORTS_TCP} $(nft_first_packets $NFQWS_MY1_TCP_PKT_OUT)"
			f6="$f4 ip6 daddr @$NFQWS_MY1_NAME6"
			f4="$f4 ip daddr @$NFQWS_MY1_NAME4"
			nft_fw_nfqws_post $1 "$f4" "$f6" $QNUM_NFQWS_MY1
		}
		[ -n "$NFQWS_MY1_TCP_PKT_IN" -a "$NFQWS_MY1_TCP_PKT_IN" != 0 ] && {
			f4="tcp sport {$NFQWS_MY1_PORTS_TCP} $(nft_first_packets $NFQWS_MY1_TCP_PKT_IN)"
			f6="$f4 ip6 saddr @$NFQWS_MY1_NAME6"
			f4="$f4 ip saddr @$NFQWS_MY1_NAME4"
			nft_fw_nfqws_pre $1 "$f4" "$f6" $QNUM_NFQWS_MY1
		}
	}
	[ -n "$NFQWS_MY1_PORTS_UDP" ] && {
		[ -n "$NFQWS_MY1_UDP_PKT_OUT" -a "$NFQWS_MY1_UDP_PKT_OUT" != 0 ] && {
			f4="udp dport {$NFQWS_MY1_PORTS_UDP} $(nft_first_packets $NFQWS_MY1_UDP_PKT_OUT)"
			f6="$f4 ip6 daddr @$NFQWS_MY1_NAME6"
			f4="$f4 ip daddr @$NFQWS_MY1_NAME4"
			nft_fw_nfqws_post $1 "$f4" "$f6" $QNUM_NFQWS_MY1
		}
		[ -n "$NFQWS_MY1_UDP_PKT_IN" -a "$NFQWS_MY1_UDP_PKT_IN" != 0 ] && {
			f4="udp sport {$NFQWS_MY1_PORTS_UDP} $(nft_first_packets $NFQWS_MY1_UDP_PKT_IN)"
			f6="$f4 ip6 saddr @$NFQWS_MY1_NAME6"
			f4="$f4 ip saddr @$NFQWS_MY1_NAME4"
			nft_fw_nfqws_pre $1 "$f4" "$f6" $QNUM_NFQWS_MY1
		}
	}
}


zapret_custom_firewall_nft_flush()
{
	# this function is called after all nft fw rules are deleted
	# however sets are not deleted. it's desired to clear sets here.

	nft_del_set $NFQWS_MY1_NAME4 2>/dev/null
	nft_del_set $NFQWS_MY1_NAME6 2>/dev/null
}