This implementation does not rely on ICMP PTB messages. Instead, QUIC packet acknowledgement is used to make sure the MTU is suppored by the path ([1], [2]). A lost packet, as detected by QUIC, indicates the MTU is too big.
Existing QUIC implementations use different approaches to size selection while probing MTU. Options are: - hardcoded MTU values array - linear search - binary search A review of size search methods is available in [3]. The algorithm implemented first tries local MTU, followed by a binary search in case the local MTU was too big. [1] https://datatracker.ietf.org/doc/html/rfc9000#name-datagram-packetization-laye [2] https://datatracker.ietf.org/doc/html/rfc8899 [3] https://www.youtube.com/watch?v=5kIe3pbK84A _______________________________________________ nginx-devel mailing list nginx-devel@nginx.org https://mailman.nginx.org/mailman/listinfo/nginx-devel
