libhomeradar

This short example will connect to an SBS1 host and to an RadarBox host. There will be a listener on port 10000 installed on which you can see all decoded messages (telnet localhost 10000).
After 5 minutes you'll see the contact statistics for both hosts and a list of all contacted aircrafts on every host.
In line 88 we disable the dupecheck for the library. Therefore you can have duplicate results in the list of contacted aircrafts.

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

#include <windows.h>

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

/* Global variable to libhomeradar */
LHR H = NULL;

/* 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: %04d\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->route:"UNKNOWN",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);
}

/* Shutdown library and finish program */
void shutdownlib(int sig) {

  printf("Shutdown system. Closing library handle...\n");

  /* Close lib handle */
  if (H) homeradar_destroy(H);
  exit(0);
}

/* Show statistics for the given host */
void statistics(const LHR H, const char *host) {
  LHR_STATS *S;

  /* Get statistics from libhomeradar */
  if ((S = homeradar_stats(H, homeradar_gethostbyname(H, host)))) {

    /* Show statistics */
    printf("\nStatistics on '%s'\n=====================================\n",host);
    printf("You are currently %sCONNECTED to this host\n",(S->connected==0)?"NOT ":"");
    if (S->connected == 1) printf("We are connected to this host since %ld seconds\n",S->online);
    printf("%ld kilobytes read from this host\n",S->bytes);
    printf("%ld messages read from this host\n",S->messages);
    printf("%ld valid messages read from this host\n",S->validmsgs);
    printf("%ld unique contacted aircrafts on this host\n",S->uniqueacs);

    /* Free allocated memory */
    free((char*)S);
  }
}

/* Main program */
int main(int argc, char **argv) {
  int e, i;
  char *s;

  /* Init global variable */
  H = homeradar_init(16,LHR_AUTOCONNECT|LHR_LOOKUP_ALL,&e,NULL);

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

  /* No dupecheck */
  e = 0; (void)homeradar_config(H, LHR_DO_DUPECHECK, (void*)&e);

  /* Catch SIGINT signals (CTRL-C) */
  (void)signal(SIGINT, shutdownlib);

  /* Load databases from disc
     Files should be located within the current directory */
  homeradar_load_databases(H, "./");

  /* Set maximum connected clients to 16 */
  e = 16; homeradar_config(H, LHR_LISTENER_MAX, (void*)&e);

  /* Add host without event listener */
  e = homeradar_addhost(H, "sbs1.libhomeradar.org", 33033, LHR_SBS1, 0, NULL);

  /* Create listener for external socket connects */
  if (!(homeradar_listener(H, LHR_ON|LHR_SBS1COMP, 10000, "localhost")))
    printf("Unable to create listener on port 10000\n");

  /* Setup the event listener for the LHR_ONCONTACT event */
  if (homeradar_onhandler(H, LHR_ONCONTACT, e, newcontact)==0)
    printf("Unable to add event listener (1)\n");

  /* Add host without event listener */
  e = homeradar_addhost(H, "radarbox.libhomeradar.org", 33333, LHR_RADARBOX, 0, NULL);

  /* Setup the event listener for the LHR_ONCONTACT event */
  if (homeradar_onhandler(H, LHR_ONCONTACT, e, newcontact)==0)
    printf("Unable to add event listener (2)\n");

  /* Do nothing - in this example - loop will be finished after 5 minutes
     In your real program you can do now what you want */
  sleep(300);

  /* Get stats from listener */
  if ((s = homeradar_listener_stats(H))) {
    printf("%s",s); free(s);
  }

  /* Disable eventhandler for contacts */
  (void)homeradar_onhandler(H, LHR_ONCONTACT, LHR_HOSTS_ALL, NULL);

  /* Get stats */
  statistics(H, "sbs1.libhomeradar.org"); statistics(H, "radarbox.libhomeradar.org");

  /* Get all contacts from SBS1 server */
  i = 0; e = homeradar_gethostbyname(H, "sbs1.libhomeradar.org");
  while ((s = homeradar_unique_aircrafts(H, e, &i))) printf("%s\n",s);

  /* Get all contacts from RadarBox server */
  i = 0; e = homeradar_gethostbyname(H, "radarbox.libhomeradar.org");
  while ((s = homeradar_unique_aircrafts(H, e, &i))) printf("%s\n",s);

  /* Destroy lib handler */
  homeradar_destroy(H);

  /* Return success */
  return 0;
}