On Mon, Dec 15, 2025 at 04:50:04PM +0100, William Lallemand wrote: > On Mon, Dec 15, 2025 at 02:24:06PM +0100, Aleksandar Lazic wrote: > > Subject: Quic in "Available multiplexer protocols" list > > Hi. > > > > I have asked myself if the Output of "Available multiplexer protocols" could > > be more precise. > > > > ``` > > Available multiplexer protocols : > > (protocols marked as <default> cannot be specified using 'proto' keyword) > > quic : mode=HTTP side=FE|BE mux=QUIC flags=HTX|NO_UPG|FRAMED > > h2 : mode=HTTP side=FE|BE mux=H2 flags=HTX|HOL_RISK|NO_UPG > > h1 : mode=HTTP side=FE|BE mux=H1 flags=HTX|NO_UPG > > <default> : mode=HTTP side=FE|BE mux=H1 flags=HTX > > fcgi : mode=HTTP side=BE mux=FCGI flags=HTX|HOL_RISK|NO_UPG > > spop : mode=SPOP side=BE mux=SPOP flags=HOL_RISK|NO_UPG > > <default> : mode=SPOP side=BE mux=SPOP flags=HOL_RISK|NO_UPG > > none : mode=TCP side=FE|BE mux=PASS flags=NO_UPG > > <default> : mode=TCP side=FE|BE mux=PASS flags= > > ``` > > > > As far as I know is `quic` used only for `h3` for now in HAProxy right? > > > > So maybe this could be reflected there like `quic+h3` or similar. > > > > Opinions? > > > > This is the list of protocols that can be used with the "proto" keyword > https://docs.haproxy.org/3.3/configuration.html#5.1-proto > So changing the name of the protocol would mean breaking other configurations, > we could have aliases thought. > > In my opinion having the quic protocol in HTTP mode is quite clear for now. > But > the naming could change if we have h3 over TCP, or non-HTTP over QUIC.
In fact it's a more general issue related to the fact that there are two protocols involved (quic and h3). It's even one identified issue among the quic working group for the work related to using QUIC multiplexing over TLS over TCP: while TLS is part of QUIC and ALPN normally advertises "h3", once placed on top of TLS+TCP, ALPN will have to advertise a variant (maybe "qmux" or any such variant denoting QUIC), and h3 will have to be advertised in some way by QUIC itself (e.g. in transport parameters maybe). We'll need to be cautious regarding this because we can easily end up with difficulties in configuring "server" lines in the future if we change anything the wrong way, so for now I'd advocate for not changing anything "just for changing". Willy
