X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=src%2Fntpd.c;h=bbc455f6dd0603a1f6135c52ae1b199ff57f24f2;hb=712c0a416128c6c742dd2721140222a28c009c22;hp=d1ce621e8be8c1ce637f041526d4d0a74768d006;hpb=859b1bd5fe320d1c71de5893746107d28b91a8e1;p=collectd.git

diff --git a/src/ntpd.c b/src/ntpd.c
index d1ce621e..bbc455f6 100644
--- a/src/ntpd.c
+++ b/src/ntpd.c
@@ -322,6 +322,18 @@ static void ntpd_submit (char *type, char *type_inst, double value)
 	plugin_dispatch_values (&vl);
 }
 
+/* Each time a peer is polled, ntpd shifts the reach register to the left and
+ * sets the LSB based on whether the peer was reachable. If the LSB is zero,
+ * the values are out of date. */
+static void ntpd_submit_reach (char *type, char *type_inst, uint8_t reach,
+		double value)
+{
+	if (!(reach & 1))
+		value = NAN;
+
+	ntpd_submit (type, type_inst, value);
+}
+
 static int ntpd_connect (void)
 {
 	char *host;
@@ -785,7 +797,7 @@ static uint32_t ntpd_get_refclock_id (struct info_peer_summary const *peer_info)
 }
 
 static int ntpd_get_name_from_address (char *buffer, size_t buffer_size,
-		struct info_peer_summary *peer_info, _Bool do_reverse_lookup)
+		struct info_peer_summary const *peer_info, _Bool do_reverse_lookup)
 {
 	struct sockaddr_storage sa;
 	socklen_t sa_len;
@@ -846,7 +858,7 @@ static int ntpd_get_name_from_address (char *buffer, size_t buffer_size,
 } /* ntpd_get_name_from_address */
 
 static int ntpd_get_name_refclock (char *buffer, size_t buffer_size,
-		struct info_peer_summary *peer_info)
+		struct info_peer_summary const *peer_info)
 {
 	uint32_t refclock_id = ntpd_get_refclock_id (peer_info);
 	uint32_t unit_id = ntohl (peer_info->srcadr) & 0x00FF;
@@ -866,7 +878,7 @@ static int ntpd_get_name_refclock (char *buffer, size_t buffer_size,
 } /* int ntpd_get_name_refclock */
 
 static int ntpd_get_name (char *buffer, size_t buffer_size,
-		struct info_peer_summary *peer_info)
+		struct info_peer_summary const *peer_info)
 {
 	uint32_t addr = ntohl (peer_info->srcadr);
 
@@ -971,6 +983,7 @@ static int ntpd_read (void)
 		DEBUG ("peer %i:\n"
 				"  peername   = %s\n"
 				"  srcadr     = 0x%08x\n"
+				"  reach      = 0%03o\n"
 				"  delay      = %f\n"
 				"  offset_int = %i\n"
 				"  offset_frc = %i\n"
@@ -979,6 +992,7 @@ static int ntpd_read (void)
 				i,
 				peername,
 				ntohl (ptr->srcadr),
+				ptr->reach,
 				ntpd_read_fp (ptr->delay),
 				ntohl (ptr->offset_int),
 				ntohl (ptr->offset_frc),
@@ -986,10 +1000,13 @@ static int ntpd_read (void)
 				ntpd_read_fp (ptr->dispersion));
 
 		if (refclock_id != 1) /* not the system clock (offset will always be zero.. */
-			ntpd_submit ("time_offset", peername, offset);
-		ntpd_submit ("time_dispersion", peername, ntpd_read_fp (ptr->dispersion));
+			ntpd_submit_reach ("time_offset", peername, ptr->reach,
+					offset);
+		ntpd_submit_reach ("time_dispersion", peername, ptr->reach,
+				ntpd_read_fp (ptr->dispersion));
 		if (refclock_id == 0) /* not a reference clock */
-			ntpd_submit ("delay", peername, ntpd_read_fp (ptr->delay));
+			ntpd_submit_reach ("delay", peername, ptr->reach,
+					ntpd_read_fp (ptr->delay));
 	}
 
 	free (ps);