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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 2; tab-width: 2 -*- */
/* GeoIPCity.c
*
* Copyright (C) 2006 MaxMind LLC
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <GeoIP.h>
#include <GeoIP_internal.h>
#include <GeoIPCity.h>
#ifndef _WIN32
#include <netdb.h>
#include <netinet/in.h> /* For ntohl */
#else
#include <windows.h>
#include <winsock.h>
#endif
#include <sys/types.h> /* For uint32_t */
#ifdef HAVE_STDINT_H
#include <stdint.h> /* For uint32_t */
#endif
static
const int FULL_RECORD_LENGTH = 50;
static
GeoIPRecord * _extract_record(GeoIP* gi, unsigned int seek_record, int *next_record_ptr) {
int record_pointer;
unsigned char *record_buf = NULL;
unsigned char *begin_record_buf = NULL;
GeoIPRecord * record;
int str_length = 0;
int j;
double latitude = 0, longitude = 0;
int dmaarea_combo = 0;
int bytes_read = 0;
if (seek_record == gi->databaseSegments[0])
return NULL;
record = malloc(sizeof(GeoIPRecord));
memset(record, 0, sizeof(GeoIPRecord));
record_pointer = seek_record + (2 * gi->record_length - 1) * gi->databaseSegments[0];
if (gi->cache == NULL) {
fseek(gi->GeoIPDatabase, record_pointer, SEEK_SET);
begin_record_buf = record_buf = malloc(sizeof(char) * FULL_RECORD_LENGTH);
bytes_read = fread(record_buf, sizeof(char), FULL_RECORD_LENGTH, gi->GeoIPDatabase);
if (bytes_read == 0) {
/* eof or other error */
free(begin_record_buf);
return NULL;
}
} else {
record_buf = gi->cache + (long)record_pointer;
}
/* get country */
record->country_code = (char *) GeoIP_country_code [record_buf[0]];
record->country_code3 = (char *) GeoIP_country_code3[record_buf[0]];
record->country_name = (char *) GeoIP_country_name [record_buf[0]];
record_buf++;
/* get region */
while (record_buf[str_length] != '\0')
str_length++;
if (str_length > 0) {
record->region = malloc(str_length+1);
strncpy(record->region, record_buf, str_length+1);
}
record_buf += str_length + 1;
str_length = 0;
/* get city */
while (record_buf[str_length] != '\0')
str_length++;
if (str_length > 0) {
record->city = malloc(str_length+1);
strncpy(record->city, record_buf, str_length+1);
}
record_buf += (str_length + 1);
str_length = 0;
/* get postal code */
while (record_buf[str_length] != '\0')
str_length++;
if (str_length > 0) {
record->postal_code = malloc(str_length+1);
strncpy(record->postal_code, record_buf, str_length+1);
}
record_buf += (str_length + 1);
/* get latitude */
for (j = 0; j < 3; ++j)
latitude += (record_buf[j] << (j * 8));
record->latitude = latitude/10000 - 180;
record_buf += 3;
/* get longitude */
for (j = 0; j < 3; ++j)
longitude += (record_buf[j] << (j * 8));
record->longitude = longitude/10000 - 180;
/* get area code and dma code for post April 2002 databases and for US locations */
if (GEOIP_CITY_EDITION_REV1 == gi->databaseType) {
if (!strcmp(record->country_code, "US")) {
record_buf += 3;
for (j = 0; j < 3; ++j)
dmaarea_combo += (record_buf[j] << (j * 8));
record->dma_code = dmaarea_combo/1000;
record->area_code = dmaarea_combo % 1000;
}
}
if (gi->cache == NULL)
free(begin_record_buf);
/* Used for GeoIP_next_record */
if (next_record_ptr != NULL)
*next_record_ptr = seek_record + record_buf - begin_record_buf + 3;
return record;
}
static
GeoIPRecord * _get_record(GeoIP* gi, unsigned long ipnum) {
unsigned int seek_record;
if (gi->databaseType != GEOIP_CITY_EDITION_REV0 &&
gi->databaseType != GEOIP_CITY_EDITION_REV1) {
printf("Invalid database type %s, expected %s\n", GeoIPDBDescription[(int)gi->databaseType], GeoIPDBDescription[GEOIP_CITY_EDITION_REV1]);
return 0;
}
seek_record = _GeoIP_seek_record(gi, ipnum);
return _extract_record(gi, seek_record, NULL);
}
GeoIPRecord * GeoIP_record_by_ipnum (GeoIP* gi, unsigned long ipnum) {
return _get_record(gi, ipnum);
}
GeoIPRecord * GeoIP_record_by_addr (GeoIP* gi, const char *addr) {
unsigned long ipnum;
if (addr == NULL) {
return 0;
}
ipnum = _GeoIP_addr_to_num(addr);
return _get_record(gi, ipnum);
}
GeoIPRecord * GeoIP_record_by_name (GeoIP* gi, const char *name) {
unsigned long ipnum;
if (name == NULL) {
return 0;
}
ipnum = _GeoIP_lookupaddress(name);
return _get_record(gi, ipnum);
}
int GeoIP_record_id_by_addr (GeoIP* gi, const char *addr) {
unsigned long ipnum;
if (gi->databaseType != GEOIP_CITY_EDITION_REV0 &&
gi->databaseType != GEOIP_CITY_EDITION_REV1) {
printf("Invalid database type %s, expected %s\n", GeoIPDBDescription[(int)gi->databaseType], GeoIPDBDescription[GEOIP_CITY_EDITION_REV1]);
return 0;
}
if (addr == NULL) {
return 0;
}
ipnum = _GeoIP_addr_to_num(addr);
return _GeoIP_seek_record(gi, ipnum);
}
int GeoIP_init_record_iter (GeoIP* gi) {
return gi->databaseSegments[0] + 1;
}
int GeoIP_next_record (GeoIP* gi, GeoIPRecord **gir, int *record_iter) {
if (gi->cache != NULL) {
printf("GeoIP_next_record not supported in memory cache mode\n");
return 1;
}
*gir = _extract_record(gi, *record_iter, record_iter);
return 0;
}
void GeoIPRecord_delete (GeoIPRecord *gir) {
free(gir->region);
free(gir->city);
free(gir->postal_code);
free(gir);
}