1 files changed, 66 insertions, 0 deletions
diff --git a/doc/platform-requirements/common.c b/doc/platform-requirements/common.c
new file mode 100644
index 0000000..d687377
--- /dev/null
+++ b/doc/platform-requirements/common.c
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+/* common.c
+ *
+ * Common helper functions for testing SO_REUSEADDR behaviour
+ *
+ * Copyright Red Hat
+ * Author: David Gibson <david@gibson.dropbear.id.au>
+ */
+
+#include <errno.h>
+#include <netinet/in.h>
+#include <string.h>
+#include <sys/socket.h>
+
+#include "common.h"
+
+int sock_reuseaddr(void)
+{
+	int y = 1;
+	int s;
+	
+
+	s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+	if (s < 0)
+		die("socket(): %s\n", strerror(errno));
+
+	if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &y, sizeof(y)) , 0)
+		die("SO_REUSEADDR: %s\n", strerror(errno));
+
+	return s;
+}
+
+/* Send a token via the given connected socket */
+void send_token(int s, long token)
+{
+	ssize_t rc;
+
+	rc = send(s, &token, sizeof(token), 0);
+	if (rc < 0)
+		die("send(): %s\n", strerror(errno));
+	if (rc < sizeof(token))
+		die("short send()\n");
+}
+
+/* Attempt to receive a token via the given socket.
+ *
+ * Returns true if we received the token, false if we got an EAGAIN, dies in any
+ * other case */
+bool recv_token(int s, long token)
+{
+	ssize_t rc;
+	long buf;
+
+	rc = recv(s, &buf, sizeof(buf), MSG_DONTWAIT);
+	if (rc < 0) {
+		if (errno == EWOULDBLOCK)
+			return false;
+		die("recv(): %s\n", strerror(errno));
+	}
+	if (rc < sizeof(buf))
+		die("short recv()\n");
+	if (buf != token)
+		die("data mismatch\n");
+	return true;
+}