discord custom

init.d/custom.d.examples.linux/50-discord-media

@@ -0,0 +1,35 @@
+# this custom script runs desync to all discord media packets
+
+# can override in config :
+NFQWS_OPT_DESYNC_DISCORD_MEDIA="${NFQWS_OPT_DESYNC_DISCORD_MEDIA:---dpi-desync=fake}"
+DISCORD_MEDIA_PORT_RANGE="${DISCORD_MEDIA_PORT_RANGE:-50000-50099}"
+
+alloc_dnum DNUM_DISCORD_MEDIA
+alloc_qnum QNUM_DISCORD_MEDIA
+
+zapret_custom_daemons()
+{
+	# $1 - 1 - add, 0 - stop
+
+	local opt="--qnum=$QNUM_DISCORD_MEDIA $NFQWS_OPT_DESYNC_DISCORD_MEDIA"
+	do_nfqws $1 $DNUM_DISCORD_MEDIA "$opt"
+}
+# size = 156 (8 udp header + 148 payload) && payload starts with 0x01000000
+zapret_custom_firewall()
+{
+        # $1 - 1 - run, 0 - stop
+
+	local DISABLE_IPV6=1
+	local port_range=$(replace_char - : $DISCORD_MEDIA_PORT_RANGE)
+	local f="-p udp --dport $port_range -m u32 --u32"
+	# this is simplified test to skip writing monstrous rule. instead of checking 64 bytes for zeroes only check 2 dwords for zero
+	fw_nfqws_post $1 "$f 0>>22&0x3C@4>>16=0x52&&0>>22&0x3C@8=0x00010046&&0>>22&0x3C@16=0&&0>>22&0x3C@76=0" '' $QNUM_DISCORD_MEDIA
+}
+zapret_custom_firewall_nft()
+{
+        # stop logic is not required
+
+	local DISABLE_IPV6=1
+	local f="udp dport $DISCORD_MEDIA_PORT_RANGE udp length == 82 @ih,0,32 0x00010046 @ih,64,128 0x00000000000000000000000000000000 @ih,192,128 0x00000000000000000000000000000000 @ih,320,128 0x00000000000000000000000000000000 @ih,448,128 0x00000000000000000000000000000000"
+	nft_fw_nfqws_post "$f" '' $QNUM_DISCORD_MEDIA
+}