BUG/MINOR: check: ensure checks are compatible with QUIC servers

Previously, checks were only performed on TCP. However, QUIC is now
supported on backend. Prior to this patch, check activation for QUIC
servers would result in a crash.

To ensure compatibility between QUIC servers and checks, adjust
protocol_lookup() performed during check connect step. Instead of using
a hardcoded PROTO_TYPE_STREAM, the value is now derived from server
settings.

This does not need to be backported.

diff --git a/src/tcpcheck.c b/src/tcpcheck.c
index ce82ea5071dbc563b95e2f493eccfea377c39a92..0e7930dfc11002473852be743072d0f93d1c288f 100644 (file)
--- a/src/tcpcheck.c
+++ b/src/tcpcheck.c
@@ -1399,7 +1399,9 @@ enum tcpcheck_eval_ret tcpcheck_eval_connect(struct check *check, struct tcpchec
        *conn->dst = (is_addr(&connect->addr)
                      ? connect->addr
                      : (is_addr(&check->addr) ? check->addr : s->addr));
-       proto = protocol_lookup(conn->dst->ss_family, PROTO_TYPE_STREAM, 0);
+       proto = s ?
+         protocol_lookup(conn->dst->ss_family, s->addr_type.proto_type, s->alt_proto) :
+         protocol_lookup(conn->dst->ss_family, PROTO_TYPE_STREAM, 0);
 
        port = 0;
        if (connect->port)