geoip-city.c

#include <stdio.h>
#include <GeoIPCity.h>

int main(int argc, char *argv[])
{
    GeoIP *geo;
    char buf[32768];
    char addr[16];
    unsigned int ip1, ip2, ip3, ip4;
    GeoIPRecord *rec;

    geo = GeoIP_open_type(GEOIP_CITY_EDITION_REV1, GEOIP_MEMORY_CACHE);
    if (geo == NULL)
    {
        fprintf(stderr, "Failed to open GeoIP city database\n");
        return 100;
    }

    while (!feof(stdin))
    {
        if (fgets(buf, sizeof(buf), stdin) == NULL)
            break;
        if (sscanf(buf, "%u.%u.%u.%u", &ip1, &ip2, &ip3, &ip4) != 4)
            continue;
        if ((ip1 > 255) || (ip2 > 255) || (ip3 > 255) || (ip4 > 255))
            continue;
        snprintf(addr, sizeof(buf), "%u.%u.%u.%u", ip1, ip2, ip3, ip4);

        rec = GeoIP_record_by_addr(geo, addr);
        if (rec == NULL)
            printf("%s\t??\t??\t??\t??\t??\t??\t??\t??\n", addr);
        else
            printf("%s\t%s\t%s\t%s\t%s\t%d\t%d\t%0.6f\t%0.6f\n", addr,
                   rec->country_code,
                   rec->region ? rec->region : "??",
                   rec->city ? rec->city : "??",
                   rec->postal_code ? rec->postal_code : "??",
                   rec->dma_code,
                   rec->area_code,
                   rec->latitude,
                   rec->longitude);
    }

    return 0;
}