MINOR: quic-be: Initial packet number space discarding.

Discard the Initial packet number space as soon as possible. This is done
during handshakes in quic_conn_io_cb() as soon as an Handshake packet could
be successfully sent.

diff --git a/src/quic_conn.c b/src/quic_conn.c
index 4b126de40d2592fefdc775fd45fdf6fafdb5738c..c565c37131ae2ce0b69ddbe4ac00db2d178cfa8e 100644 (file)
--- a/src/quic_conn.c
+++ b/src/quic_conn.c
@@ -900,6 +900,26 @@ struct task *quic_conn_io_cb(struct task *t, void *context, unsigned int state)
                goto out;
        }
 
+       /* RFC 9001. 4.9.1. Discarding Initial Keys
+        *
+        * The successful use of Handshake packets indicates that no more Initial
+        * packets need to be exchanged, as these keys can only be produced after
+        * receiving all CRYPTO frames from Initial packets. Thus, a client MUST
+        * discard Initial keys when it first sends a Handshake packet...
+        */
+
+       if (!qc_is_listener(qc) && !quic_tls_pktns_is_dcd(qc, qc->ipktns) &&
+           qc->hpktns && qc->hpktns->tx.in_flight > 0) {
+               /* Discard the Initial packet number space. */
+               TRACE_PROTO("discarding Initial pktns", QUIC_EV_CONN_PRSHPKT, qc);
+               quic_pktns_discard(qc->ipktns, qc);
+               qc_set_timer(qc);
+               qc_el_rx_pkts_del(qc->iel);
+               qc_release_pktns_frms(qc, qc->ipktns);
+       }
+
+       qc_txb_release(qc);
+
  out:
        /* Release the Handshake encryption level and packet number space if
         * the Handshake is confirmed and if there is no need to send