diff --git a/doh.h b/doh.h
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+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// This file is autogenerated by:
+//   cbindgen --config cbindgen.toml doh.rs >doh.h
+// Don't modify manually.
+
+#pragma once
+
+/* Generated with cbindgen:0.15.0 */
+
+#include <stdint.h>
+#include <sys/types.h>
+
+/// Context for a running DoH engine and associated thread.
+struct DohServer;
+
+extern "C" {
+
+/// Performs static initialization fo the DoH engine.
+const char* doh_init();
+
+/// Creates and returns a DoH engine instance.
+/// The returned object must be freed with doh_delete().
+DohServer* doh_new(const char* url, const char* ip_addr, uint32_t mark, const char* cert_path);
+
+/// Deletes a DoH engine created by doh_new().
+void doh_delete(DohServer* doh);
+
+/// Sends a DNS query and waits for the response.
+ssize_t doh_query(DohServer* doh, uint8_t* query, size_t query_len, uint8_t* response,
+                  size_t response_len);
+
+}  // extern "C"