FakeTCP functionality?

[iopq]

Hysteria 1 had FakeTCP which prevented UDP blocks. No current software has support for this, so my UDP connections get dropped after after an hour. Could this be implemented in xray?

[iopq]

The design is as follows:

The packets to the server will look like syn/ack and so forth to establish it, and it will appear like a TCP connection over SSL - exactly like connecting to a normal website. But actually it's transmitting UDP packets out of order as the payload.

All of the middleboxes will see it as TCP connections to some website while you're playing some p2p game over UDP or having some kind of a call

[0xffabc]

As a temporary solution, you can take a look to udp2raw, it can turn udp traffic to fake tcp, identically as hysteria does. It can bypass blocking udp via firewall, but the only problem lies if your ISP tends to block raw sockets (for example, via deep packet inspection in case of Russia)

Adding this functionality directly into xray core would be still better, so I think that's a good idea

[iopq]

I am actually going to go install udp2raw as you suggested, but it presents a lot of extra challenges since I already use a GUI. If I'm just running a random program it needs to be carefully routed so I don't make a loop, I need to make sure I have full cone NAT, etc.

Xray basically already works, except for, you know, getting disconnected when there's UDP traffic. I would love to be able to just use the same web panel and GUI and flip some switches to use FakeTCP for the UDP connections

[0xffabc]

I guess it would be good to turn this discussion into an issue, since it's an important feature

As far as I know, Russian government is developing a system for blocking voice calls in messangers. For sure, it will be just a DPI extension that completely disables UDP frames.
Since Russia allies with China in terms of having these experiments, I've got an idea that they have target of mainly blocking VPNs (most of vpn protocols use udp). Thus, DPI tends to block the traffic is had failed to determine for some ISPs
It won't be very good if those 2 things will combine - deep packet inspection will be able to block every VPN that doesn't mask it's traffic. Lots of people still would want to use UDP because of it's speed, so FakeTCP is an important feature