1 files changed, 32 insertions, 0 deletions
diff --git a/rdns_scan/zmap4rdns/lib/random.c b/rdns_scan/zmap4rdns/lib/random.c
new file mode 100644
index 0000000..e3ac8f8
--- /dev/null
+++ b/rdns_scan/zmap4rdns/lib/random.c
@@ -0,0 +1,32 @@
+/*
+ * ZMap Copyright 2013 Regents of the University of Michigan
+ *
+ * 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
+ */
+
+#include "random.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+#include "logger.h"
+
+#define RANDSRC "/dev/urandom"
+
+int random_bytes(void *dst, size_t n)
+{
+	FILE *f = fopen(RANDSRC, "rb");
+	if (!f) {
+		log_fatal("random", "unable to read /dev/urandom: %s",
+			  strerror(errno));
+	}
+	size_t r = fread(dst, n, 1, f);
+	fclose(f);
+	if (r < 1) {
+		return 0;
+	}
+	return 1;
+}