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/* net_dgpsip.c -- gather and dispatch DGPS data from DGPSIP servers
*
* This file is Copyright (c) 2010 by the GPSD project
* BSD terms apply: see the file COPYING in the distribution root for details.
*/
#include <sys/types.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#ifndef S_SPLINT_S
#include <netdb.h>
#include <sys/socket.h>
#include <unistd.h>
#endif /* S_SPLINT_S */
#include "gpsd.h"
/*@ -branchstate */
int dgpsip_open(struct gps_device_t *device, const char *dgpsserver)
/* open a connection to a DGPSIP server */
{
char *colon, *dgpsport = "rtcm-sc104";
int opts;
device->dgpsip.reported = false;
if ((colon = strchr(dgpsserver, ':')) != NULL) {
dgpsport = colon + 1;
*colon = '\0';
}
if (!getservbyname(dgpsport, "tcp"))
dgpsport = DEFAULT_RTCM_PORT;
device->gpsdata.gps_fd =
netlib_connectsock(AF_UNSPEC, dgpsserver, dgpsport, "tcp");
// cppcheck-suppress pointerPositive
if (device->gpsdata.gps_fd >= 0) {
char hn[256], buf[BUFSIZ];
gpsd_report(device->context->debug, LOG_PROG,
"connection to DGPS server %s established.\n",
dgpsserver);
(void)gethostname(hn, sizeof(hn));
/* greeting required by some RTCM104 servers; others will ignore it */
(void)snprintf(buf, sizeof(buf), "HELO %s gpsd %s\r\nR\r\n", hn,
VERSION);
if (write(device->gpsdata.gps_fd, buf, strlen(buf)) != (ssize_t) strlen(buf))
gpsd_report(device->context->debug, LOG_ERROR,
"hello to DGPS server %s failed\n",
dgpsserver);
} else
gpsd_report(device->context->debug, LOG_ERROR,
"can't connect to DGPS server %s, netlib error %d.\n",
dgpsserver, device->gpsdata.gps_fd);
opts = fcntl(device->gpsdata.gps_fd, F_GETFL);
if (opts >= 0)
(void)fcntl(device->gpsdata.gps_fd, F_SETFL, opts | O_NONBLOCK);
device->servicetype = service_dgpsip;
return device->gpsdata.gps_fd;
}
/*@ +branchstate */
void dgpsip_report(struct gps_context_t *context,
struct gps_device_t *gps,
struct gps_device_t *dgpsip)
/* may be time to ship a usage report to the DGPSIP server */
{
/*
* 10 is an arbitrary number, the point is to have gotten several good
* fixes before reporting usage to our DGPSIP server.
*/
if (context->fixcnt > 10 && !dgpsip->dgpsip.reported) {
dgpsip->dgpsip.reported = true;
if (dgpsip->gpsdata.gps_fd > -1) {
char buf[BUFSIZ];
(void)snprintf(buf, sizeof(buf), "R %0.8f %0.8f %0.2f\r\n",
gps->gpsdata.fix.latitude,
gps->gpsdata.fix.longitude,
gps->gpsdata.fix.altitude);
if (write(dgpsip->gpsdata.gps_fd, buf, strlen(buf)) ==
(ssize_t) strlen(buf))
gpsd_report(context->debug, LOG_IO, "=> dgps %s\n", buf);
else
gpsd_report(context->debug, LOG_IO, "write to dgps FAILED\n");
}
}
}
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