MINOR: quic: Display the SSL alert in ->ssl_send_alert() callback.

At least displays the SSL alert error code passed to ->ssl_send_alert()
QUIC BIO method and the SSL encryption level. This function is newly called
when using picoquic client with a recent version of BoringSSL (Nov 19 2020).
This is not the case with OpenSSL with 32 as QUIC draft implementation.

diff --git a/src/xprt_quic.c b/src/xprt_quic.c
index e4e6b629d48446c5c0189d57a04d2d42aeb043e1..16c8c435277f8e42c1ea7385d59cc13d5afa6237 100644 (file)
--- a/src/xprt_quic.c
+++ b/src/xprt_quic.c
@@ -519,6 +519,17 @@ static void quic_trace(enum trace_level level, uint64_t mask, const struct trace
                                              (unsigned long long)pkt->cdata_len);
                        }
                }
+
+               if (mask & QUIC_EV_CONN_SSLALERT) {
+                       const uint8_t *alert = a2;
+                       const enum ssl_encryption_level_t *level = a3;
+
+                       if (alert)
+                               chunk_appendf(&trace_buf, " alert=0x%02x", *alert);
+                       if (level)
+                               chunk_appendf(&trace_buf, " el=%c",
+                                             quic_enc_level_char(ssl_to_quic_enc_level(*level)));
+               }
        }
        if (mask & QUIC_EV_CONN_LPKT) {
                const struct quic_rx_packet *pkt = a2;
@@ -847,8 +858,7 @@ int ha_quic_send_alert(SSL *ssl, enum ssl_encryption_level_t level, uint8_t aler
 {
        struct connection *conn = SSL_get_ex_data(ssl, ssl_app_data_index);
 
-       TRACE_ENTER(QUIC_EV_CONN_SSLALERT, conn);
-       TRACE_LEAVE(QUIC_EV_CONN_SSLALERT, conn);
+       TRACE_DEVEL("SSL alert", QUIC_EV_CONN_SSLALERT, conn, &alert, &level);
        return 1;
 }