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MINOR: xprt_qmux: define default value for get_alpn

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Extend get_alpn() for xprt_qmux layer. If lower layer does not implement
ALPN negotiation, return a statically default protocol value. Currently
this is set to "h3".

This change is required to support QMux in clear without SSL. In the
future, it could be useful to configure the default protocol, for
example by extending the syntax for the "proto" keyword.
This commit is contained in:
Amaury Denoyelle 2026-04-29 15:09:38 +02:00
parent 9e6e0fd149
commit cdeb2aa4ef
1 changed files with 11 additions and 0 deletions
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11
src/xprt_qmux.c
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@ -12,6 +12,9 @@
#include <haproxy/quic_frame.h>
#include <haproxy/quic_tp-t.h>
/* Default protocol when not running over SSL layer. */
#define XPRT_QMUX_DEFAULT_ALPN "h3"
struct xprt_qmux_ctx {
struct connection *conn;
struct wait_event wait_event;
@ -346,6 +349,14 @@ static int xprt_qmux_get_alpn(const struct connection *conn, void *xprt_ctx,
const char **str, int *len)
{
struct xprt_qmux_ctx *ctx = xprt_ctx;
/* Return a the default ALPN if lower layer is not able to negotiate it. */
if (!ctx->ops_lower || !ctx->ops_lower->get_alpn) {
*str = XPRT_QMUX_DEFAULT_ALPN;
*len = strlen(XPRT_QMUX_DEFAULT_ALPN);
return 1;
}
return ctx->ops_lower->get_alpn(conn, ctx->ctx_lower, str, len);
}