zapret/init.d/sysv/custom.d.examples/50-quic4all

# this custom script runs desync to all QUIC initial packets, without ipset/hostlist filtering
# need to add to config : NFQWS_OPT_DESYNC_QUIC="--dpi-desync=fake"
# NOTE : do not use TTL fooling. chromium QUIC engine breaks sessions if TTL expired in transit received

alloc_dnum DNUM_QUIC4ALL
alloc_qnum QNUM_QUIC4ALL

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

	local opt="--qnum=$QNUM_QUIC4ALL $NFQWS_OPT_BASE $NFQWS_OPT_DESYNC_QUIC"
	do_nfqws $1 $DNUM_QUIC4ALL "$opt"
}
zapret_custom_firewall()
{
	# $1 - 1 - run, 0 - stop

	local f
	local first_packets_only="$ipt_connbytes 1:3"
	local desync="-m mark ! --mark $DESYNC_MARK/$DESYNC_MARK"

	f="-p udp -m multiport --dports $QUIC_PORTS_IPT"
	fw_nfqws_post $1 "$f $desync $first_packets_only" "$f $desync $first_packets_only" $QNUM_QUIC4ALL

}
zapret_custom_firewall_nft()
{
	# stop logic is not required

	local f
	local first_packets_only="$nft_connbytes 1-3"
	local desync="mark and $DESYNC_MARK == 0"

	f="udp dport {$QUIC_PORTS}"
	nft_fw_nfqws_post "$f $desync $first_packets_only" "$f $desync $first_packets_only" $QNUM_QUIC4ALL
}