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init.d/sysv/custom.d.examples/50-dht4all

@@ -0,0 +1,39 @@
+# this custom script runs desync to DHT packets with udp payload length 101..399 , without ipset/hostlist filtering
+# need to add to config : NFQWS_OPT_DESYNC_DHT="--dpi-desync=fake --dpi-desync-ttl=5"
+
+DNUM=101
+QNUM2=$(($DNUM * 5))
+
+zapret_custom_daemons()
+{
+        # stop logic is managed by procd
+
+        local opt="--qnum=$QNUM2 $NFQWS_OPT_BASE $NFQWS_OPT_DESYNC_DHT"
+	do_nfqws $1 $DNUM "$opt"
+}
+zapret_custom_firewall()
+{
+        # $1 - 1 - run, 0 - stop
+
+        local f uf4 uf6
+        local first_packet_only="$ipt_connbytes 1:1"
+        local desync="-m mark ! --mark $DESYNC_MARK/$DESYNC_MARK"
+
+        f='-p udp -m length --length 109:407 -m u32 --u32'
+	uf4='0>>22&0x3C@8>>16=0x6431'
+	uf6='48>>16=0x6431'
+        fw_nfqws_post $1 "$f $uf4 $desync $first_packet_only"  "$f $uf6 $desync $first_packet_only" $QNUM2
+
+}
+zapret_custom_firewall_nft()
+{
+        # stop logic is not required
+
+        local f
+        local first_packet_only="$nft_connbytes 1"
+        local desync="mark and $DESYNC_MARK == 0"
+
+        f="meta length 109-407 meta l4proto udp @th,64,16 0x6431"
+        nft_fw_nfqws_post "$f $desync $first_packet_only" "$f $desync $first_packet_only" $QNUM2
+}
+