1 files changed, 73 insertions, 0 deletions
diff --git a/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_settings.h b/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_settings.h
new file mode 100644
index 0000000..8a8ddc2
--- /dev/null
+++ b/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_settings.h
@@ -0,0 +1,73 @@
+/*
+ * ngtcp2
+ *
+ * Copyright (c) 2024 ngtcp2 contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGTCP2_SETTINGS_H
+#define NGTCP2_SETTINGS_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <ngtcp2/ngtcp2.h>
+
+/*
+ * ngtcp2_settings_convert_to_latest converts |src| of version
+ * |settings_version| to the latest version NGTCP2_SETTINGS_VERSION.
+ *
+ * |dest| must point to the latest version.  |src| may be the older
+ * version, and if so, it may have fewer fields.  Accessing those
+ * fields causes undefined behavior.
+ *
+ * If |settings_version| == NGTCP2_SETTINGS_VERSION, no conversion is
+ * made, and |src| is returned.  Otherwise, first |dest| is
+ * initialized via ngtcp2_settings_default, and then all valid fields
+ * in |src| are copied into |dest|.  Finally, |dest| is returned.
+ */
+const ngtcp2_settings *
+ngtcp2_settings_convert_to_latest(ngtcp2_settings *dest, int settings_version,
+                                  const ngtcp2_settings *src);
+
+/*
+ * ngtcp2_settings_convert_to_old converts |src| of the latest version
+ * to |dest| of version |settings_version|.
+ *
+ * |settings_version| must not be the latest version
+ *  NGTCP2_SETTINGS_VERSION.
+ *
+ * |dest| points to the older version, and it may have fewer fields.
+ * Accessing those fields causes undefined behavior.
+ *
+ * This function copies all valid fields in version |settings_version|
+ * from |src| to |dest|.
+ */
+void ngtcp2_settings_convert_to_old(int settings_version, ngtcp2_settings *dest,
+                                    const ngtcp2_settings *src);
+
+/*
+ * ngtcp2_settingslen_version returns the effective length of
+ * ngtcp2_settings at the version |settings_version|.
+ */
+size_t ngtcp2_settingslen_version(int settings_version);
+
+#endif /* NGTCP2_SETTINGS_H */