adds clock description

Adds struct containing clock description info that will be needed for
USER_DESCRIPTION and CLOCK_DESCRIPTION management messages.

Signed-off-by: Geoff Salmon <gsalmon@se-instruments.com>

clock.c

@@ -79,6 +79,7 @@ struct clock {
 	tmv_t c2;
 	tmv_t t1;
 	tmv_t t2;
+	struct clock_description desc;
 };
 
 struct clock the_clock;
@@ -430,6 +431,7 @@ struct clock *clock_create(int phc_index, struct interface *iface, int count,
 
 	c->free_running = dds->free_running;
 	c->freq_est_interval = dds->freq_est_interval;
+	c->desc = dds->clock_desc;
 
 	if (c->free_running) {
 		c->clkid = CLOCK_INVALID;
@@ -951,3 +953,8 @@ static void handle_state_decision_event(struct clock *c)
 		port_dispatch(c->port[i], event, fresh_best);
 	}
 }
+
+struct clock_description *clock_description(struct clock *c)
+{
+	return &c->desc;
+}

clock.h

@@ -215,4 +215,11 @@ void clock_sync_interval(struct clock *c, int n);
  */
 struct timePropertiesDS *clock_time_properties(struct clock *c);
 
+/**
+ * Obtain a clock's description.
+ * @param c  The clock instance.
+ * @return   A pointer to the clock_description of the clock.
+ */
+struct clock_description *clock_description(struct clock *c);
+
 #endif

ds.h

@@ -39,10 +39,19 @@ struct defaultDS {
 	UInteger8            reserved2;
 } PACKED;
 
+#define OUI_LEN 3
+struct clock_description {
+	struct static_ptp_text productDescription;
+	struct static_ptp_text revisionData;
+	struct static_ptp_text userDescription;
+	Octet manufacturerIdentity[OUI_LEN];
+};
+
 struct default_ds {
 	struct defaultDS dds;
 	int free_running;
 	int freq_est_interval; /*log seconds*/
+	struct clock_description clock_desc;
 };
 
 struct dataset {

ptp4l.c

@@ -52,6 +52,18 @@ static struct config cfg_settings = {
 		},
 		.free_running = 0,
 		.freq_est_interval = 1,
+		.clock_desc = {
+			.productDescription = {
+				.max_symbols = 64,
+				.text = ";;"
+			},
+			.revisionData = {
+				.max_symbols = 32,
+				.text = ";;"
+			},
+			.userDescription      = { .max_symbols = 128 },
+			.manufacturerIdentity = { 0, 0, 0 },
+		},
 	},
 
 	.pod = {