Re: [PATCH net-next v4 01/15] net: define IPPROTO_QUIC and SOL_QUIC constants

On 10/29/25 3:35 PM, Xin Long wrote:
> This patch adds IPPROTO_QUIC and SOL_QUIC constants to the networking
> subsystem. These definitions are essential for applications to set
> socket options and protocol identifiers related to the QUIC protocol.
> 
> QUIC does not possess a protocol number allocated from IANA, and like
> IPPROTO_MPTCP, IPPROTO_QUIC is merely a value used when opening a QUIC
> socket with:
> 
>   socket(AF_INET, SOCK_STREAM, IPPROTO_QUIC);
> 
> Note we did not opt for UDP ULP for QUIC implementation due to several
> considerations:
> 
> - QUIC's connection Migration requires at least 2 UDP sockets for one
>   QUIC connection at the same time, not to mention the multipath
>   feature in one of its draft RFCs.
> 
> - In-Kernel QUIC, as a Transport Protocol, wants to provide users with
>   the TCP or SCTP like Socket APIs, like connect()/listen()/accept()...
>   Note that a single UDP socket might even be used for multiple QUIC
>   connections.
> 
> The use of IPPROTO_QUIC type sockets over UDP tunnel will effectively
> address these challenges and provides a more flexible and scalable
> solution.
> 
> Signed-off-by: Xin Long <[email protected]>

Acked-by: Paolo Abeni <[email protected]>