Add the main program.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>

clock.h

@@ -20,6 +20,16 @@
 #define HAVE_CLOCK_H
 
 #include "ds.h"
+#include "transport.h"
+
+#define MAX_PORTS 8
+
+/** Defines a network interface, with PTP options. */
+struct interface {
+	char *name;
+	enum transport_type transport;
+	enum timestamp_type timestamping;
+};
 
 /** Opaque type. */
 struct clock;
@@ -47,6 +57,20 @@ struct port *clock_best_port(struct clock *c);
  */
 UInteger8 clock_class(struct clock *c);
 
+/**
+ * Create a clock instance. There can only be one clock in any system,
+ * so subsequent calls will destroy the previous clock instance.
+ *
+ * @param phc         PTP hardware clock device to use.
+ *                    Pass NULL to select CLOCK_REALTIME.
+ * @param interface   An array of network interfaces.
+ * @param count       The number of elements in @a interfaces.
+ * @param ds          A pointer to a default data set for the clock.
+ * @return            A pointer to the single global clock instance.
+ */
+struct clock *clock_create(char *phc, struct interface *iface, int count,
+			   struct defaultDS *ds);
+
 /**
  * Obtains a clock's default data set.
  * @param c  The clock instance.
@@ -54,4 +78,11 @@ UInteger8 clock_class(struct clock *c);
  */
 struct dataset *clock_default_ds(struct clock *c);
 
+/**
+ * Poll for events and dispatch them.
+ * @param c A pointer to a clock instance obtained with clock_create().
+ * @return  Zero on success, non-zero otherwise.
+ */
+int clock_poll(struct clock *c);
+
 #endif

linuxptp.c

@@ -0,0 +1,161 @@
+/**
+ * @file
+ * @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 <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "clock.h"
+#include "print.h"
+#include "transport.h"
+#include "udp.h"
+
+#define DEFAULT_PHC "/dev/ptp0"
+
+static int running = 1;
+static struct defaultDS ds;
+
+static int generate_clock_identity(struct ClockIdentity *ci, char *name)
+{
+	unsigned char mac[6];
+	if (udp_interface_macaddr(name, mac, sizeof(mac)))
+		return -1;
+	ci->id[0] = mac[0];
+	ci->id[1] = mac[1];
+	ci->id[2] = mac[2];
+	ci->id[3] = 0xFF;
+	ci->id[4] = 0xFE;
+	ci->id[5] = mac[3];
+	ci->id[6] = mac[4];
+	ci->id[7] = mac[5];
+	return 0;
+}
+
+static void usage(char *progname)
+{
+	fprintf(stderr,
+		"\nusage: %s [options]\n\n"
+		" Network Transport\n\n"
+		" -2        IEEE 802.3\n"
+		" -4        UDP IPV4 (default)\n"
+		" -6        UDP IPV6\n\n"
+		" Time Stamping\n\n"
+		" -r        HARDWARE (default)\n"
+		" -s        SOFTWARE\n"
+		" -z        LEGACY HW\n\n"
+		" Other Options\n\n"
+		" -h        prints this message and exits\n"
+		" -i [dev]  interface device to use, for example 'eth0'\n"
+		"           (may be specified multiple times)\n"
+		" -p [dev]  PTP hardware clock device to use, default '%s'\n"
+		"           (ignored when SOFTWARE time stamping is selected)\n\n",
+		progname, DEFAULT_PHC);
+}
+
+int main(int argc, char *argv[])
+{
+	char *phc = DEFAULT_PHC, *progname;
+	int c, i, nports = 0;
+	struct interface iface[MAX_PORTS];
+	enum transport_type transport = TRANS_UDP_IPV4;
+	enum timestamp_type timestamping = TS_HARDWARE;
+	struct clock *clock;
+
+	/* Process the command line arguments. */
+	progname = strrchr(argv[0], '/');
+	progname = progname ? 1+progname : argv[0];
+	while (EOF != (c = getopt(argc, argv, "246hi:p:rsz"))) {
+		switch (c) {
+		case '2':
+			transport = TRANS_IEEE_802_3;
+			break;
+		case '4':
+			transport = TRANS_UDP_IPV4;
+			break;
+		case '6':
+			transport = TRANS_UDP_IPV6;
+			break;
+		case 'i':
+			if (nports < MAX_PORTS) {
+				iface[nports++].name = optarg;
+			} else {
+				fprintf(stderr, "too many interfaces\n");
+				return -1;
+			}
+			break;
+		case 'p':
+			phc = optarg;
+			break;
+		case 'r':
+			timestamping = TS_HARDWARE;
+			break;
+		case 's':
+			timestamping = TS_SOFTWARE;
+			break;
+		case 'z':
+			timestamping = TS_LEGACY_HW;
+			break;
+		case 'h':
+			usage(progname);
+			return 0;
+		case '?':
+			usage(progname);
+			return -1;
+		default:
+			usage(progname);
+			return -1;
+		}
+	}
+
+	if (!nports) {
+		usage(progname);
+		return -1;
+	}
+	for (i = 0; i < nports; i++) {
+		iface[i].transport = transport;
+		iface[i].timestamping = timestamping;
+	}
+	if (timestamping == TS_SOFTWARE) {
+		phc = NULL;
+	}
+
+	ds.priority1 = 128;
+	ds.clockQuality.clockClass = 248;
+	ds.clockQuality.clockAccuracy = 0xfe;
+	ds.clockQuality.offsetScaledLogVariance = 0xffff;
+	ds.priority2 = 128;
+
+	if (generate_clock_identity(&ds.clockIdentity, iface[0].name)) {
+		fprintf(stderr, "failed to generate a clock identity\n");
+		return -1;
+	}
+
+	clock = clock_create(phc, iface, nports, &ds);
+	if (!clock) {
+		fprintf(stderr, "failed to create a clock\n");
+		return -1;
+	}
+
+	while (running) {
+		if (clock_poll(clock))
+			break;
+	}
+
+	return 0;
+}

makefile

@@ -24,7 +24,8 @@ CFLAGS	= -Wall $(INC) $(DEBUG)
 LDFLAGS	=
 LDLIBS	= -lm -lrt
 PRG	= linuxptp
-OBJ	= bmc.o fsm.o msg.o phc.o pi.o print.o servo.o transport.o udp.o util.o
+OBJ	= bmc.o fsm.o linuxptp.o msg.o phc.o pi.o print.o \
+ servo.o transport.o udp.o util.o
 
 SRC	= $(OBJ:.o=.c)
 DEPEND	= $(OBJ:.o=.d)