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diff --git a/src/iperf_util.h b/src/iperf_util.h
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+/*
+ * iperf, Copyright (c) 2014-2017, The Regents of the University of
+ * California, through Lawrence Berkeley National Laboratory (subject
+ * to receipt of any required approvals from the U.S. Dept. of
+ * Energy).  All rights reserved.
+ *
+ * If you have questions about your rights to use or distribute this
+ * software, please contact Berkeley Lab's Technology Transfer
+ * Department at TTD@lbl.gov.
+ *
+ * NOTICE.  This software is owned by the U.S. Department of Energy.
+ * As such, the U.S. Government has been granted for itself and others
+ * acting on its behalf a paid-up, nonexclusive, irrevocable,
+ * worldwide license in the Software to reproduce, prepare derivative
+ * works, and perform publicly and display publicly.  Beginning five
+ * (5) years after the date permission to assert copyright is obtained
+ * from the U.S. Department of Energy, and subject to any subsequent
+ * five (5) year renewals, the U.S. Government is granted for itself
+ * and others acting on its behalf a paid-up, nonexclusive,
+ * irrevocable, worldwide license in the Software to reproduce,
+ * prepare derivative works, distribute copies to the public, perform
+ * publicly and display publicly, and to permit others to do so.
+ *
+ * This code is distributed under a BSD style license, see the LICENSE
+ * file for complete information.
+ */
+#ifndef __IPERF_UTIL_H
+#define __IPERF_UTIL_H
+
+#include "iperf_config.h"
+#include "cjson.h"
+#include <sys/select.h>
+#include <stddef.h>
+
+int readentropy(void *out, size_t outsize);
+
+void fill_with_repeating_pattern(void *out, size_t outsize);
+
+void make_cookie(char *);
+
+int is_closed(int);
+
+double timeval_to_double(struct timeval *tv);
+
+int timeval_equals(struct timeval *tv0, struct timeval *tv1);
+
+double timeval_diff(struct timeval *tv0, struct timeval *tv1);
+
+void cpu_util(double pcpu[3]);
+
+const char* get_system_info(void);
+
+const char* get_optional_features(void);
+
+cJSON* iperf_json_printf(const char *format, ...);
+
+void iperf_dump_fdset(FILE *fp, const char *str, int nfds, fd_set *fds);
+
+#ifndef HAVE_DAEMON
+extern int daemon(int nochdir, int noclose);
+#endif /* HAVE_DAEMON */
+
+#ifndef HAVE_GETLINE
+ssize_t getline(char **buf, size_t *bufsiz, FILE *fp);
+#endif /* HAVE_GETLINE */
+
+#endif