If another node used QUIC

Support
1

My node seems to have synced with another node. The information shows that it used the QUIC protocol and the UDP protocol. How did they achieve that?

2 
2023-09-29 06:58:13 [Consensus] discovered: 12D3KooWPcsUwx3doGMbsLsoi5Ks8mVRkd1mGrZuUjfqWLdpPTks /ip4/43.248.98.190/udp/4001/quic    
2023-09-29 06:58:13 [Consensus] discovered: 12D3KooWPcsUwx3doGMbsLsoi5Ks8mVRkd1mGrZuUjfqWLdpPTks /ip4/43.248.98.190/udp/4001/quic-v1    
2023-09-29 06:58:13 [Consensus] discovered: 12D3KooWPcsUwx3doGMbsLsoi5Ks8mVRkd1mGrZuUjfqWLdpPTks /ip4/43.248.98.190/tcp/4001
3

Both TCP and QUIC are technially suppored by nodes, but TCP is still used by default. I have not seen QUIC reported as discovered before though. Someone might have compiled custom version of the software where QUIC is used by default.

4

Here is someone compiling node with QUIC support: When using QUIC numerous `State mismatch` errors appear

5

Did they compile it after modifying the official code? Or does the official version already have a feature that allows the use of Quic?

6

Official version supports QUIC (experimentally) in a sense that it is able to communicate QUIC with others, but it will not initiate QUIC connections by default, software modifications are necessary for that.