Add initial version

The initial version implements the basic functionality
of the client/server communication and lease management.

For now, one lease is created per valid connector (dependent
on CRTC availablity).

Bug-AGL: SPEC-3729

Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp>
Change-Id: I2b37a892742cc22bdc53a5172c8ad3d8a7bb5e66

1 files changed, 48 insertions, 0 deletions

diff --git a/common/socket-path.c b/common/socket-path.c
new file mode 100644
index 0000000..7a412da
--- /dev/null
+++ b/common/socket-path.c
@@ -0,0 +1,48 @@
+/* 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 "socket-path.h"
+#include "config.h"
+#include "log.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define RUNTIME_PATH DLM_DEFAULT_RUNTIME_PATH
+
+bool sockaddr_set_lease_server_path(struct sockaddr_un *sa,
+				    const char *lease_name)
+{
+	int maxlen = sizeof(sa->sun_path);
+	char *socket_dir = getenv("DLM_RUNTIME_PATH") ?: RUNTIME_PATH;
+
+	int len =
+	    snprintf(sa->sun_path, maxlen, "%s/%s", socket_dir, lease_name);
+
+	if (len < 0) {
+		DEBUG_LOG("Socket path creation failed: %s\n", strerror(errno));
+		return false;
+	}
+	if (len >= maxlen) {
+		errno = ENAMETOOLONG;
+		DEBUG_LOG("Socket directoy path too long. "
+			  "Full path to socket must be less than %d bytes\n",
+			  maxlen);
+		return false;
+	}
+	return true;
+}