QUIC: Add handling of SSL_get_shutdown()

Return SSL_SENT_SHUTDOWN and SSL_RECEIVED_SHUTDOWN with semantics
similar to TLS connections.

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22408)

3 files changed, 31 insertions, 5 deletions

diff --git a/ssl/quic/quic_channel.c b/ssl/quic/quic_channel.c
index 3b9993b96a..8e75eda539 100644
--- a/ssl/quic/quic_channel.c
+++ b/ssl/quic/quic_channel.c
@@ -635,7 +635,7 @@ int ossl_quic_channel_is_active(const QUIC_CHANNEL *ch)
     return ch != NULL && ch->state == QUIC_CHANNEL_STATE_ACTIVE;
 }
 
-static int ossl_quic_channel_is_closing(const QUIC_CHANNEL *ch)
+int ossl_quic_channel_is_closing(const QUIC_CHANNEL *ch)
 {
     return ch->state == QUIC_CHANNEL_STATE_TERMINATING_CLOSING;
 }
diff --git a/ssl/quic/quic_impl.c b/ssl/quic/quic_impl.c
index 29a283dca0..bdf5d5fea8 100644
--- a/ssl/quic/quic_impl.c
+++ b/ssl/quic/quic_impl.c
@@ -3572,6 +3572,27 @@ const SSL_CIPHER *ossl_quic_get_cipher(unsigned int u)
 }
 
 /*
+ * SSL_get_shutdown()
+ * ------------------
+ */
+int ossl_quic_get_shutdown(const SSL *s)
+{
+    QCTX ctx;
+    int shut = 0;
+
+    if (!expect_quic_conn_only(s, &ctx))
+        return 0;
+
+    if (ossl_quic_channel_is_term_any(ctx.qc->ch)) {
+        shut |= SSL_SENT_SHUTDOWN;
+        if (!ossl_quic_channel_is_closing(ctx.qc->ch))
+            shut |= SSL_RECEIVED_SHUTDOWN;
+    }
+
+    return shut;
+}
+
+/*
  * Internal Testing APIs
  * =====================
  */
diff --git a/ssl/ssl_lib.c b/ssl/ssl_lib.c
index f15fe126a2..bd9160b756 100644
--- a/ssl/ssl_lib.c
+++ b/ssl/ssl_lib.c
@@ -5142,7 +5142,7 @@ void SSL_set_quiet_shutdown(SSL *s, int mode)
 {
     SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);
 
-    /* TODO(QUIC): Currently not supported for QUIC. */
+    /* Not supported with QUIC */
     if (sc == NULL)
         return;
 
@@ -5153,7 +5153,7 @@ int SSL_get_quiet_shutdown(const SSL *s)
 {
     const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL_ONLY(s);
 
-    /* TODO(QUIC): Currently not supported for QUIC. */
+    /* Not supported with QUIC */
     if (sc == NULL)
         return 0;
 
@@ -5164,7 +5164,7 @@ void SSL_set_shutdown(SSL *s, int mode)
 {
     SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);
 
-    /* TODO(QUIC): Do we want this for QUIC? */
+    /* Not supported with QUIC */
     if (sc == NULL)
         return;
 
@@ -5175,7 +5175,12 @@ int SSL_get_shutdown(const SSL *s)
 {
     const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL_ONLY(s);
 
-    /* TODO(QUIC): Do we want this for QUIC? */
+#ifndef OPENSSL_NO_QUIC
+    /* QUIC: Just indicate whether the connection was shutdown cleanly. */
+    if (IS_QUIC(s))
+        return ossl_quic_get_shutdown(s);
+#endif
+
     if (sc == NULL)
         return 0;