diff --git a/makefile b/makefile
index a3cccb0..21ec67a 100644
--- a/makefile
+++ b/makefile
@@ -24,7 +24,7 @@ CFLAGS	= -Wall $(INC) $(DEBUG)
 LDFLAGS	=
 LDLIBS	= -lm -lrt
 PRG	= linuxptp
-OBJ	= bmc.o fsm.o phc.o print.o
+OBJ	= bmc.o fsm.o phc.o print.o util.o
 
 SRC	= $(OBJ:.o=.c)
 DEPEND	= $(OBJ:.o=.d)
diff --git a/util.c b/util.c
new file mode 100644
index 0000000..0e01e21
--- /dev/null
+++ b/util.c
@@ -0,0 +1,74 @@
+/**
+ * @file util.c
+ * @note Copyright (C) 2011 Richard Cochran <richardcochran@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#include <stdio.h>
+
+#include "util.h"
+
+char *ps_str[] = {
+	"NONE",
+	"INITIALIZING",
+	"FAULTY",
+	"DISABLED",
+	"LISTENING",
+	"PRE_MASTER",
+	"MASTER",
+	"GRAND_MASTER",
+	"PASSIVE",
+	"UNCALIBRATED",
+	"SLAVE",
+};
+
+char *ev_str[] = {
+	"NONE",
+	"POWERUP",
+	"INITIALIZE",
+	"DESIGNATED_ENABLED",
+	"DESIGNATED_DISABLED",
+	"FAULT_CLEARED",
+	"FAULT_DETECTED",
+	"STATE_DECISION_EVENT",
+	"QUALIFICATION_TIMEOUT_EXPIRES",
+	"ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES",
+	"SYNCHRONIZATION_FAULT",
+	"MASTER_CLOCK_SELECTED",
+	"RS_MASTER",
+	"RS_SLAVE",
+	"RS_PASSIVE",
+};
+
+char *cid2str(struct ClockIdentity *id)
+{
+	static char buf[64];
+	unsigned char *ptr = id->id;
+	snprintf(buf, sizeof(buf), "%02x%02x%02x.%02x%02x.%02x%02x%02x",
+		 ptr[0], ptr[1], ptr[2], ptr[3],
+		 ptr[4], ptr[5], ptr[6], ptr[7]);
+	return buf;
+}
+
+char *pid2str(struct PortIdentity *id)
+{
+	static char buf[64];
+	unsigned char *ptr = id->clockIdentity.id;
+	snprintf(buf, sizeof(buf), "%02x%02x%02x.%02x%02x.%02x%02x%02x-%hu",
+		 ptr[0], ptr[1], ptr[2], ptr[3],
+		 ptr[4], ptr[5], ptr[6], ptr[7],
+		 id->portNumber);
+	return buf;
+}
diff --git a/util.h b/util.h
new file mode 100644
index 0000000..50b9c7c
--- /dev/null
+++ b/util.h
@@ -0,0 +1,57 @@
+/**
+ * @file util.h
+ * @brief Various little utility functions that do not fit in elsewhere.
+ * @note Copyright (C) 2011 Richard Cochran <richardcochran@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef HAVE_UTIL_H
+#define HAVE_UTIL_H
+
+#include "ddt.h"
+
+/**
+ * Table of human readable strings, one for each port state.
+ */
+extern char *ps_str[];
+
+/**
+ * Table of human readable strings, one for each port event.
+ */
+extern char *ev_str[];
+
+/**
+ * Convert a clock identity into a human readable string.
+ *
+ * Note that this function uses a static global variable to store the
+ * result and therefore is not reentrant.
+ *
+ * @param id  Clock idendtity to show.
+ * @return    Pointer to a static global buffer holding the result.
+ */
+char *cid2str(struct ClockIdentity *id);
+
+/**
+ * Convert a port identity into a human readable string.
+ *
+ * Note that this function uses a static global variable to store the
+ * result and therefore is not reentrant.
+ *
+ * @param id  Port idendtity to show.
+ * @return    Pointer to a static global buffer holding the result.
+ */
+char *pid2str(struct PortIdentity *id);
+
+#endif