libhomeradar

Show only Lufthansa aircrafts

This example will connect to a single SBS-1 host and only aircrafts from the German Carrier 'Lufthansa' will be written to stdout. We use a single filter rule to realize this plan. For some filter rules it is required to load the databases! In this example we assign only a filter to the callsign. Therefore the databases must not be loaded. This program will run appr. 5 minutes.

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/* System includes */
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

/* libhomeradar header include */
#include "libhomeradar.h"

/* Callback function to show aircraft informations */
void newcontact(void *handle,const int *id, LHR_CONTACT *C) {
  LHR_AIRPORTS *P;

  printf("%sContact: %s [%s]\nAirline: %s\nFlightnumber: %s  Callsign: %s\nSquawk: %d\n",
         (C->newcontact)?"AIR":"",
          C->icao24,(C->reg)?C->reg:"UNKNOWN",
         (C->airline)?C->airline:"NULL",C->flightnum,C->callsign,C->squawk);
  printf("Aircraft: %s %s [%s] cn:%s\n",C->manufacturer,C->model,C->details,C->cn);
  printf("Routing: %s LAT: %0.5f LON: %0.5f\n",C->route,C->lat,C->lon);

  /* Get airport informations */
  P = C->airports;
  while (P) {
    if (P->airport) {
      printf("Airport [%s / %s] Name: %s, %s\n",
             P->airport->iata,P->airport->icao,
             P->airport->name,P->airport->country);
    } else printf("Unresolveable: %s\n",P->apcode);
    P = P->next;
  }

  /* Free LHR_CONTACT struct */
  homeradar_freecontact(C); 
}

/* Connect is established */
void connected(LHR handle, const int *item) {
  printf("SUCCESSFULLY CONNECTED TO = %s\n",homeradar_gethostbyid(handle,*(item)));

  /* Setup the event listener for the LHR_ONCONTACT event */
  if (homeradar_onhandler(handle, LHR_ONCONTACT, *(item), newcontact)==0) {
    printf("Unable to add event listener\n");
  } else printf("Contact handler successfully installed\n");
}

/* Main program */
int main(int argc, char **argv) {
  int e;
  LHR H = homeradar_init(16,LHR_AUTOCONNECT,&e,NULL);

  /* No error */
  if (H == NULL) {
    printf("Error initializing libhomeradar. Errorcode #%d\n",e);
    return 255;
  }

  /* Add host without event listener */
  e = homeradar_addhost(H, "sbs1.libhomeradar.org", 33033, LHR_SBS1, LHR_ONCONNECT, connected);

  /* Show only aircrafts from german carrier 'Lufthansa' */
  (void)homeradar_addfilter(H, LHR_FILTER_BYCALLSIGN|LHR_FILTER_INCLUDE, "DLH*", e);

  /* Do nothing - in this example - loop will be finished after 5 minutes
     In your real program you can do now what you want */
  e = 49;
  while (e--) sleep(6);

  /* Shutdown libhomeradar and free all alocated memory */
  printf("Shutdown libhomeradar...\n");
  homeradar_destroy(H);

  /* Return success */
  return 0;
}