--- /dev/null
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * 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.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#include <grpc/grpc.h>
+#include <grpc/grpc_posix.h>
+#include <grpc/support/log.h>
+
+#ifdef GPR_SUPPORT_CHANNELS_FROM_FD
+
+#include <fcntl.h>
+
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/iomgr/endpoint.h"
+#include "src/core/lib/iomgr/tcp_client_posix.h"
+#include "src/core/lib/iomgr/tcp_posix.h"
+#include "src/core/lib/surface/api_trace.h"
+#include "src/core/lib/surface/channel.h"
+#include "src/core/lib/transport/transport.h"
+
+grpc_channel* grpc_insecure_channel_create_from_fd(
+ const char* target, int fd, const grpc_channel_args* args) {
+ grpc_core::ExecCtx exec_ctx;
+ GRPC_API_TRACE("grpc_insecure_channel_create(target=%p, fd=%d, args=%p)", 3,
+ (target, fd, args));
+
+ grpc_arg default_authority_arg = grpc_channel_arg_string_create(
+ (char*)GRPC_ARG_DEFAULT_AUTHORITY, (char*)"test.authority");
+ grpc_channel_args* final_args =
+ grpc_channel_args_copy_and_add(args, &default_authority_arg, 1);
+
+ int flags = fcntl(fd, F_GETFL, 0);
+ GPR_ASSERT(fcntl(fd, F_SETFL, flags | O_NONBLOCK) == 0);
+
+ grpc_endpoint* client = grpc_tcp_client_create_from_fd(
+ grpc_fd_create(fd, "client", true), args, "fd-client");
+
+ grpc_transport* transport =
+ grpc_create_chttp2_transport(final_args, client, true);
+ GPR_ASSERT(transport);
+ grpc_channel* channel = grpc_channel_create(
+ target, final_args, GRPC_CLIENT_DIRECT_CHANNEL, transport);
+ grpc_channel_args_destroy(final_args);
+ grpc_chttp2_transport_start_reading(transport, nullptr, nullptr);
+
+ grpc_core::ExecCtx::Get()->Flush();
+
+ return channel != nullptr ? channel
+ : grpc_lame_client_channel_create(
+ target, GRPC_STATUS_INTERNAL,
+ "Failed to create client channel");
+}
+
+#else // !GPR_SUPPORT_CHANNELS_FROM_FD
+
+grpc_channel* grpc_insecure_channel_create_from_fd(
+ const char* target, int fd, const grpc_channel_args* args) {
+ GPR_ASSERT(0);
+ return nullptr;
+}
+
+#endif // GPR_SUPPORT_CHANNELS_FROM_FD