Add dgnss.c, which should have been checked in with the NTRIP support.

Also check in the heading patch under -DHEADING_FIX.

1 files changed, 76 insertions, 0 deletions

diff --git a/dgnss.c b/dgnss.c
new file mode 100644
index 00000000..b98d1a54
--- /dev/null
+++ b/dgnss.c
@@ -0,0 +1,76 @@
+/* dgnss.c -- common interface to a number of Differential GNSS services */
+
+#include <string.h>
+
+#include "gpsd.h"
+
+#define DGNSS_PROTO_DGPSIP	"dgpsip://"
+#define DGNSS_PROTO_NTRIP	"ntrip://"
+
+/* Where to find the list of DGPSIP correction servers, if there is one */
+#define DGPSIP_SERVER_LIST	"/usr/share/gpsd/dgpsip-servers"
+
+/*@ -branchstate */
+int dgnss_open(struct gps_context_t *context, char *dgnss_service)
+/* open a connection to a DGNSS service */
+{
+    if (strncmp(dgnss_service,DGNSS_PROTO_NTRIP,strlen(DGNSS_PROTO_NTRIP))==0)
+        return ntrip_open(context, dgnss_service + strlen(DGNSS_PROTO_NTRIP));
+
+    if (strncmp(dgnss_service,DGNSS_PROTO_DGPSIP,strlen(DGNSS_PROTO_DGPSIP))==0)
+        return dgpsip_open(context, dgnss_service + strlen(DGNSS_PROTO_DGPSIP));
+
+#ifndef REQUIRE_DGNSS_PROTO
+    return dgpsip_open(context, dgnss_service);
+#else
+    gpsd_report(1, "Unknown or unspecified DGNSS protocol for service %s\n",
+		dgnss_service);
+    return -1;
+#endif
+}
+/*@ +branchstate */
+
+void dgnss_poll(struct gps_context_t *context)
+/* poll the DGNSS service for a correction report */
+{
+    if (context->dgnss_service == dgnss_dgpsip)
+	dgpsip_poll(context);
+    else if (context->dgnss_service == dgnss_ntrip)
+	ntrip_poll(context);
+
+}
+
+void dgnss_report(struct gps_device_t *session)
+/* may be time to ship a usage report to the DGNSS service */
+{
+    if (session->context->dgnss_service == dgnss_dgpsip)
+	dgpsip_report(session);
+    else if (session->context->dgnss_service == dgnss_ntrip)
+	ntrip_report(session);
+}
+
+void dgnss_autoconnect(struct gps_context_t *context, double lat, double lon)
+{
+    if (context->dgnss_service != dgnss_ntrip) {
+	dgpsip_autoconnect(context, lat, lon, DGPSIP_SERVER_LIST);
+    }
+}
+
+void rtcm_relay(struct gps_device_t *session)
+/* pass a DGNSS connection report to a session */
+{
+    if (session->gpsdata.gps_fd !=-1 
+	&& session->context->rtcmbytes > -1
+	&& session->rtcmtime < session->context->rtcmtime
+	&& session->device_type->rtcm_writer != NULL) {
+	if (session->device_type->rtcm_writer(session, 
+					      session->context->rtcmbuf, 
+					      (size_t)session->context->rtcmbytes) == 0)
+	    gpsd_report(1, "Write to rtcm sink failed\n");
+	else { 
+	    session->rtcmtime = timestamp();
+	    gpsd_report(2, "<= DGPS: %d bytes of RTCM relayed.\n", session->context->rtcmbytes);
+	}
+    }
+}
+