QUIC DISPATCH/APL: Implement SSL_get_stream_id

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from #20765)

include/internal/quic_ssl.h

@@ -68,6 +68,7 @@ __owur int ossl_quic_conn_set_initial_peer_addr(SSL *s,
 __owur SSL *ossl_quic_conn_stream_new(SSL *s, uint64_t flags);
 __owur SSL *ossl_quic_get0_connection(SSL *s);
 __owur int ossl_quic_get_stream_type(SSL *s);
+__owur uint64_t ossl_quic_get_stream_id(SSL *s);
 
 /*
  * Used to override ossl_time_now() for debug purposes. Must be called before

include/openssl/ssl.h.in

@@ -2275,6 +2275,8 @@ __owur int SSL_is_connection(SSL *s);
 #define SSL_STREAM_TYPE_BIDI        (SSL_STREAM_TYPE_READ | SSL_STREAM_TYPE_WRITE)
 __owur int SSL_get_stream_type(SSL *s);
 
+__owur uint64_t SSL_get_stream_id(SSL *s);
+
 #define SSL_STREAM_FLAG_UNI     (1U << 0)
 __owur SSL *SSL_new_stream(SSL *s, uint64_t flags);
 

ssl/quic/quic_impl.c

@@ -1867,6 +1867,20 @@ int ossl_quic_get_stream_type(SSL *s)
         return SSL_STREAM_TYPE_WRITE;
 }
 
+/*
+ * SSL_get_stream_id
+ * -----------------
+ */
+uint64_t ossl_quic_get_stream_id(SSL *s)
+{
+    QCTX ctx;
+
+    if (!expect_quic_with_stream(s, /*remote_init=*/-1, &ctx))
+        return UINT64_MAX;
+
+    return ctx.xso->stream->id;
+}
+
 /*
  * QUIC Front-End I/O API: SSL_CTX Management
  * ==========================================

ssl/ssl_lib.c

@@ -7340,6 +7340,18 @@ int SSL_get_stream_type(SSL *s)
 #endif
 }
 
+uint64_t SSL_get_stream_id(SSL *s)
+{
+#ifndef OPENSSL_NO_QUIC
+    if (!IS_QUIC(s))
+        return UINT64_MAX;
+
+    return ossl_quic_get_stream_id(s);
+#else
+    return UINT64_MAX;
+#endif
+}
+
 int SSL_add_expected_rpk(SSL *s, EVP_PKEY *rpk)
 {
     unsigned char *data = NULL;