1 files changed, 15 insertions, 0 deletions

diff --git a/usr.sbin/xntpd/xntpd/refclock_nmea.c b/usr.sbin/xntpd/xntpd/refclock_nmea.c
index f8ae4bc72130..b7be01dc4162 100644
--- a/usr.sbin/xntpd/xntpd/refclock_nmea.c
+++ b/usr.sbin/xntpd/xntpd/refclock_nmea.c
@@ -210,15 +210,20 @@ nmea_receive(rbufp)
 	 * we only care about a few of them.  The most important being
 	 * the $GPRMC format
 	 * $GPRMC,hhmmss,a,fddmm.xx,n,dddmmm.xx,w,zz.z,yyy.,ddmmyy,dd,v*CC
+  	 * $GPGGA,162617.0,4548.339,N,00837.719,E,1,07,0.97,00262,M,048,M,,*5D
 	 */
 #define GPRMC	0
 #define GPXXX	1
+#define GPGCA	2
 	cp = pp->lastcode;
 	pp->leap = 0;
 	cmdtype=0;
 	if(strncmp(cp,"$GPRMC",6)==0) {
 		cmdtype=GPRMC;
 		}
+	else if(strncmp(cp,"$GPGGA",6)==0) {
+		cmdtype=GPGCA;
+		}
 	else if(strncmp(cp,"$GPXXX",6)==0) {
 		cmdtype=GPXXX;
 		}
@@ -227,6 +232,7 @@ nmea_receive(rbufp)
 
 	switch( cmdtype ) {
 	case GPRMC:
+	case GPGCA:
 		/*
 		 *	Check time code format of NMEA
 		 */
@@ -250,6 +256,14 @@ nmea_receive(rbufp)
 
 	}
 
+	if (cmdtype ==GPGCA) {
+		/* only time */
+		time_t tt = time(NULL);
+		struct tm * t = gmtime(&tt);
+		day = t->tm_mday;
+		month = t->tm_mon + 1;
+		pp->year= t->tm_year;
+	} else {
 	dp = field_parse(cp,9);
 	/*
 	 * Convert date and check values.
@@ -260,6 +274,7 @@ nmea_receive(rbufp)
 	month = (month * 10) + dp[3] - '0';
 	pp->year = dp[4] - '0';
 	pp->year = (pp->year * 10) + dp[5] - '0';
+	}
 
 	if (month < 1 || month > 12 || day < 1) {
 		refclock_report(peer, CEVNT_BADTIME);