1 files changed, 91 insertions, 0 deletions
diff --git a/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_settings.c b/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_settings.c
new file mode 100644
index 0000000..77a68bd
--- /dev/null
+++ b/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_settings.c
@@ -0,0 +1,91 @@
+/*
+ * 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.
+ */
+#include "ngtcp2_settings.h"
+
+#include <string.h>
+#include <assert.h>
+
+#include "ngtcp2_unreachable.h"
+
+void ngtcp2_settings_default_versioned(int settings_version,
+                                       ngtcp2_settings *settings) {
+  size_t len = ngtcp2_settingslen_version(settings_version);
+
+  memset(settings, 0, len);
+
+  switch (settings_version) {
+  case NGTCP2_SETTINGS_VERSION:
+  case NGTCP2_SETTINGS_V1:
+    settings->cc_algo = NGTCP2_CC_ALGO_CUBIC;
+    settings->initial_rtt = NGTCP2_DEFAULT_INITIAL_RTT;
+    settings->ack_thresh = 2;
+    settings->max_tx_udp_payload_size = 1500 - 48;
+    settings->handshake_timeout = UINT64_MAX;
+
+    break;
+  }
+}
+
+static void settings_copy(ngtcp2_settings *dest, const ngtcp2_settings *src,
+                          int settings_version) {
+  assert(settings_version != NGTCP2_SETTINGS_VERSION);
+
+  memcpy(dest, src, ngtcp2_settingslen_version(settings_version));
+}
+
+const ngtcp2_settings *
+ngtcp2_settings_convert_to_latest(ngtcp2_settings *dest, int settings_version,
+                                  const ngtcp2_settings *src) {
+  if (settings_version == NGTCP2_SETTINGS_VERSION) {
+    return src;
+  }
+
+  ngtcp2_settings_default(dest);
+
+  settings_copy(dest, src, settings_version);
+
+  return dest;
+}
+
+void ngtcp2_settings_convert_to_old(int settings_version, ngtcp2_settings *dest,
+                                    const ngtcp2_settings *src) {
+  assert(settings_version != NGTCP2_SETTINGS_VERSION);
+
+  settings_copy(dest, src, settings_version);
+}
+
+size_t ngtcp2_settingslen_version(int settings_version) {
+  ngtcp2_settings settings;
+
+  switch (settings_version) {
+  case NGTCP2_SETTINGS_VERSION:
+    return sizeof(settings);
+  case NGTCP2_SETTINGS_V1:
+    return offsetof(ngtcp2_settings, initial_pkt_num) +
+           sizeof(settings.initial_pkt_num);
+  default:
+    ngtcp2_unreachable();
+  }
+}