MINOR: frontend: retrieve the ALPN name when available

Here we try to retrieve the negociated ALPN on the front connection.
This will be used to decide whether or not we want to switch to H2.

diff --git a/src/frontend.c b/src/frontend.c
index 4ad3cfe58b8ad592e49457c928badd9fecfa317a..efb6bde2aa4f09a76eb08a0bddb002797761d30a 100644 (file)
--- a/src/frontend.c
+++ b/src/frontend.c
@@ -56,6 +56,14 @@ int frontend_accept(struct stream *s)
        struct connection *conn = objt_conn(sess->origin);
        struct listener *l = sess->listener;
        struct proxy *fe = sess->fe;
+       const char *alpn_str = NULL;
+       int alpn_len;
+
+       /* check if we're in HTTP mode, directly connected to the connection,
+        * and with ALPN advertising H2.
+        */
+       if (conn->owner == &s->si[0])
+               conn_get_alpn(conn, &alpn_str, &alpn_len);
 
        if ((fe->mode == PR_MODE_TCP || fe->mode == PR_MODE_HTTP)
            && (!LIST_ISEMPTY(&fe->logsrvs))) {