+/* Copyright 2020-2021 IGEL Co., Ltd.
+ *
+ * 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 "dlm-protocol.h"
+
+#include <errno.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+bool receive_dlm_client_request(int socket, struct dlm_client_request *request)
+{
+
+ ssize_t len;
+ struct iovec iov = {
+ .iov_base = request,
+ .iov_len = sizeof(*request),
+ };
+ struct msghdr msg = {
+ .msg_iov = &iov,
+ .msg_iovlen = 1,
+ };
+
+ while ((len = recvmsg(socket, &msg, 0)) < 0) {
+ if (errno != EINTR)
+ return false;
+ }
+
+ if (len != sizeof(*request)) {
+ errno = EPROTO;
+ return false;
+ }
+ return true;
+}
+
+bool send_dlm_client_request(int socket, struct dlm_client_request *request)
+{
+ struct iovec iov = {
+ .iov_base = request,
+ .iov_len = sizeof(*request),
+ };
+
+ struct msghdr msg = {
+ .msg_iov = &iov,
+ .msg_iovlen = 1,
+ };
+
+ while (sendmsg(socket, &msg, 0) < 1) {
+ if (errno != EINTR)
+ return false;
+ }
+ return true;
+}