diff --git a/src/util.c b/src/util.c
new file mode 100644
index 0000000..2e7a245
--- /dev/null
+++ b/src/util.c
@@ -0,0 +1,99 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <netdb.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <math.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <signal.h>
+#include <arpa/inet.h>
+#include <time.h>
+#include <sys/time.h>
+#include <arpa/inet.h>
+
+
+// Detect OSX
+#ifdef __MACH__
+    #include <mach/clock.h>
+    #include <mach/mach.h>
+#endif 
+
+// Detect Raspi
+#ifdef __ARM
+    #include <linux/ioctl.h>
+    #include <asm-generic/ioctl.h>
+    #include <asm-generic/termios.h>
+#endif
+
+
+
+
+#include "util.h"
+
+/* portable time, as listed in https://gist.github.com/jbenet/1087739  */
+void current_utc_time(struct timespec *ts) {
+#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time
+  clock_serv_t cclock;
+  mach_timespec_t mts;
+  host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
+  clock_get_time(cclock, &mts);
+  mach_port_deallocate(mach_task_self(), cclock);
+  ts->tv_sec = mts.tv_sec;
+  ts->tv_nsec = mts.tv_nsec;
+#else
+  clock_gettime(CLOCK_REALTIME, ts);
+#endif
+}
+
+
+
+
+
+/* a better clock() in milliseconds */
+long fastclock(void)
+{
+	struct timespec t;
+	long r;
+
+	current_utc_time (&t);
+	r = t.tv_sec * 1000;
+	r = r + t.tv_nsec / 1000000;
+	return r;
+}
+
+
+int kbhit (void)
+{
+  	struct timeval tv;
+  	fd_set rdfs;
+
+  	tv.tv_sec = 0;
+  	tv.tv_usec = 0;
+
+  	FD_ZERO(&rdfs);
+  	FD_SET (STDIN_FILENO, &rdfs);
+
+  	select (STDIN_FILENO+1, &rdfs, NULL, NULL, &tv);
+  	return FD_ISSET(STDIN_FILENO, &rdfs);
+}
+
+
+/* get sockaddr, IPv4 or IPv6: */
+void *get_in_addr(struct sockaddr *sa)
+{
+	if (sa->sa_family == AF_INET) {
+		return &(((struct sockaddr_in*)sa)->sin_addr);
+	}
+
+	return &(((struct sockaddr_in6*)sa)->sin6_addr);
+}
+
+
+
diff --git a/src/util.h b/src/util.h
new file mode 100644
index 0000000..81e8989
--- /dev/null
+++ b/src/util.h
@@ -0,0 +1,5 @@
+void current_utc_time(struct timespec *ts);
+long fastclock(void);
+int kbhit (void);
+void *get_in_addr(struct sockaddr *sa);
+