forked from osmocom/wireshark
![Pascal Quantin](/assets/img/avatar_default.png)
This solves a crash occurring when trying to free memory allocated by GeoIP (cross-compiled with mingw(32|64)) with MSVC function Bug: 13598 Change-Id: I757cff13660bd485d7ea91d10660e9bf86404728 Reviewed-on: https://code.wireshark.org/review/21090 Petri-Dish: Pascal Quantin <pascal.quantin@gmail.com> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Guy Harris <guy@alum.mit.edu>
651 lines
18 KiB
C
651 lines
18 KiB
C
/* geoip_db.c
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* GeoIP database support
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*
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* Copyright 2008, Gerald Combs <gerald@wireshark.org>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* To do:
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* We currently return a single string for each database. Some databases,
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* e.g. GeoIPCity, can return other info such as area codes.
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*/
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#include "config.h"
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#include <glib.h>
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#include <epan/wmem/wmem.h>
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#ifdef HAVE_GEOIP
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#include <GeoIP.h>
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#include <GeoIPCity.h>
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#include <epan/geoip_db.h>
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#include <epan/uat.h>
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#include <epan/prefs.h>
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#include <epan/value_string.h>
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#include <wsutil/report_message.h>
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#include <wsutil/file_util.h>
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/* This needs to match NUM_GEOIP_COLS in hostlist_table.h */
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#define MAX_GEOIP_DBS 13
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#ifndef HAVE_GEOIP_FREE
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#define GeoIP_free free
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#endif
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/* Column names for each database type */
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value_string geoip_type_name_vals[] = {
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{ GEOIP_COUNTRY_EDITION, "Country" },
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{ GEOIP_REGION_EDITION_REV0, "Region" },
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{ GEOIP_CITY_EDITION_REV0, "City"},
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{ GEOIP_ORG_EDITION, "Organization" },
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{ GEOIP_ISP_EDITION, "ISP" },
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{ GEOIP_CITY_EDITION_REV1, "City" },
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{ GEOIP_REGION_EDITION_REV1, "Region" },
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{ GEOIP_PROXY_EDITION, "Proxy" },
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{ GEOIP_ASNUM_EDITION, "AS Number" },
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{ GEOIP_NETSPEED_EDITION, "Speed" },
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{ GEOIP_DOMAIN_EDITION, "Domain" },
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#ifdef HAVE_GEOIP_V6
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{ GEOIP_COUNTRY_EDITION_V6, "Country" },
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/* This is the closest thing to a version that GeoIP.h seems to provide. */
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#if NUM_DB_TYPES > 31 /* 1.4.7 */
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{ GEOIP_CITY_EDITION_REV0_V6, "City"},
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{ GEOIP_CITY_EDITION_REV1_V6, "City"},
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{ GEOIP_ASNUM_EDITION_V6, "AS Number" },
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{ GEOIP_ISP_EDITION_V6, "ISP" },
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{ GEOIP_ORG_EDITION_V6, "Organization" },
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{ GEOIP_DOMAIN_EDITION_V6, "Domain" },
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#endif /* NUM_DB_TYPES > 31 */
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#if NUM_DB_TYPES > 32 /* 1.4.8 */
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{ GEOIP_NETSPEED_EDITION_REV1_V6, "Speed" },
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#endif /* NUM_DB_TYPES > 32 */
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#endif /* HAVE_GEOIP_V6 */
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{ WS_LAT_FAKE_EDITION, "Latitude" }, /* fake database */
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{ WS_LON_FAKE_EDITION, "Longitude" }, /* fake database */
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{ 0, NULL }
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};
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static GArray *geoip_dat_arr = NULL;
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/* UAT definitions. Copied from oids.c */
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typedef struct _geoip_db_path_t {
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char* path;
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} geoip_db_path_t;
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static geoip_db_path_t *geoip_db_paths = NULL;
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static guint num_geoip_db_paths = 0;
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static const geoip_db_path_t geoip_db_system_paths[] = {
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#ifdef G_OS_UNIX
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{ "/usr/share/GeoIP" },
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#endif
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{ NULL }
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};
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static uat_t *geoip_db_paths_uat = NULL;
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UAT_DIRECTORYNAME_CB_DEF(geoip_mod, path, geoip_db_path_t)
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/**
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* Scan a directory for GeoIP databases and load them
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*/
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static void
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geoip_dat_scan_dir(const char *dirname) {
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WS_DIR *dir;
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WS_DIRENT *file;
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const char *name;
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char *datname;
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GeoIP *gi;
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if ((dir = ws_dir_open(dirname, 0, NULL)) != NULL) {
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while ((file = ws_dir_read_name(dir)) != NULL) {
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name = ws_dir_get_name(file);
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if (g_str_has_prefix(file, "Geo") && g_str_has_suffix(file, ".dat")) {
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datname = g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", dirname, name);
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gi = GeoIP_open(datname, GEOIP_MEMORY_CACHE);
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if (gi) {
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g_array_append_val(geoip_dat_arr, gi);
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}
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g_free(datname);
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}
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}
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ws_dir_close (dir);
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}
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}
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/* UAT callbacks */
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static void* geoip_db_path_copy_cb(void* dest, const void* orig, size_t len _U_) {
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const geoip_db_path_t *m = (const geoip_db_path_t *)orig;
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geoip_db_path_t *d = (geoip_db_path_t *)dest;
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d->path = g_strdup(m->path);
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return d;
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}
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static void geoip_db_path_free_cb(void* p) {
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geoip_db_path_t *m = (geoip_db_path_t *)p;
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g_free(m->path);
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}
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static void geoip_dat_cleanup(void) {
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GeoIP *gi;
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guint i;
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/* If we have old data, clear out the whole thing
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* and start again. TODO: Just update the ones that
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* have changed for efficiency's sake. */
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if (geoip_dat_arr) {
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/* skip the last two, as they are fake */
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for (i = 0; i < geoip_db_num_dbs() - 2; i++) {
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gi = g_array_index(geoip_dat_arr, GeoIP *, i);
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if (gi) {
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GeoIP_delete(gi);
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}
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}
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/* don't use GeoIP_delete() on the two fake
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* databases as they weren't created by GeoIP_new()
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* or GeoIP_open() */
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gi = g_array_index(geoip_dat_arr, GeoIP *, i);
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if (gi) {
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g_free(gi);
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}
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gi = g_array_index(geoip_dat_arr, GeoIP *, i+1);
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if (gi) {
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g_free(gi);
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}
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/* finally, free the array itself */
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g_array_free(geoip_dat_arr, TRUE);
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geoip_dat_arr = NULL;
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}
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}
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/* called every time the user presses "Apply" or "OK in the list of
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* GeoIP directories, and also once on startup */
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static void geoip_db_post_update_cb(void) {
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guint i;
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GeoIP* gi;
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geoip_dat_cleanup();
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/* allocate the array */
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geoip_dat_arr = g_array_new(FALSE, FALSE, sizeof(GeoIP *));
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/* First try the system paths */
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for (i = 0; geoip_db_system_paths[i].path != NULL; i++) {
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geoip_dat_scan_dir(geoip_db_system_paths[i].path);
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}
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/* Walk all the directories */
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for (i = 0; i < num_geoip_db_paths; i++) {
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if (geoip_db_paths[i].path) {
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geoip_dat_scan_dir(geoip_db_paths[i].path);
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}
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}
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/* add fake databases for latitude and longitude
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* (using "City" in reality) */
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/* latitude */
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gi = (GeoIP *)g_malloc(sizeof (GeoIP));
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gi->databaseType = WS_LAT_FAKE_EDITION;
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g_array_append_val(geoip_dat_arr, gi);
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/* longitude */
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gi = (GeoIP *)g_malloc(sizeof (GeoIP));
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gi->databaseType = WS_LON_FAKE_EDITION;
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g_array_append_val(geoip_dat_arr, gi);
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}
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static void geoip_db_cleanup(void)
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{
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geoip_dat_cleanup();
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}
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/**
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* Initialize GeoIP lookups
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*/
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void
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geoip_db_pref_init(module_t *nameres)
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{
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static uat_field_t geoip_db_paths_fields[] = {
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UAT_FLD_DIRECTORYNAME(geoip_mod, path, "GeoIP Database Directory", "The GeoIP database directory path"),
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UAT_END_FIELDS
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};
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geoip_db_paths_uat = uat_new("GeoIP Database Paths",
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sizeof(geoip_db_path_t),
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"geoip_db_paths",
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FALSE,
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(void**)&geoip_db_paths,
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&num_geoip_db_paths,
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/* affects dissection of packets (as the GeoIP database is
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used when dissecting), but not set of named fields */
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UAT_AFFECTS_DISSECTION,
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"ChGeoIPDbPaths",
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geoip_db_path_copy_cb,
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NULL,
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geoip_db_path_free_cb,
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geoip_db_post_update_cb,
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geoip_db_cleanup,
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geoip_db_paths_fields);
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prefs_register_uat_preference(nameres,
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"geoip_db_paths",
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"GeoIP database directories",
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"Search paths for GeoIP address mapping databases."
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" Wireshark will look in each directory for files beginning"
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" with \"Geo\" and ending with \".dat\".",
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geoip_db_paths_uat);
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}
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guint
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geoip_db_num_dbs(void) {
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return (geoip_dat_arr == NULL) ? 0 : geoip_dat_arr->len;
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}
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const gchar *
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geoip_db_name(guint dbnum) {
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GeoIP *gi;
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gi = g_array_index(geoip_dat_arr, GeoIP *, dbnum);
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if (gi) {
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return (val_to_str_const(gi->databaseType, geoip_type_name_vals, "Unknown database"));
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}
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return "Invalid database";
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}
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int
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geoip_db_type(guint dbnum) {
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GeoIP *gi;
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gi = g_array_index(geoip_dat_arr, GeoIP *, dbnum);
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if (gi) {
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return (gi->databaseType);
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}
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return -1;
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}
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static int
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geoip_db_lookup_latlon4(guint32 addr, float *lat, float *lon) {
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GeoIP *gi;
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GeoIPRecord *gir;
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guint i;
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for (i = 0; i < geoip_db_num_dbs(); i++) {
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gi = g_array_index(geoip_dat_arr, GeoIP *, i);
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if (gi) {
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switch (gi->databaseType) {
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case GEOIP_CITY_EDITION_REV0:
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case GEOIP_CITY_EDITION_REV1:
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gir = GeoIP_record_by_ipnum(gi, addr);
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if (gir) {
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*lat = gir->latitude;
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*lon = gir->longitude;
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GeoIPRecord_delete(gir);
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return 0;
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}
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return -1;
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/*break;*/
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default:
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break;
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}
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}
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}
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return -1;
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}
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/*
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* GeoIP 1.4.3 and later provide GeoIP_set_charset(), but in versions
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* 1.4.3 to 1.4.6 that only applies to the City databases. I.e., it's
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* possible to produce invalid UTF-8 sequences even if GeoIP_set_charset()
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* is used.
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*/
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/* Ensure that a given db value is UTF-8 */
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static char *
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db_val_to_utf_8(const char *val, GeoIP *gi) {
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if (GeoIP_charset(gi) == GEOIP_CHARSET_ISO_8859_1) {
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char *utf8_val;
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utf8_val = g_convert(val, -1, "UTF-8", "ISO-8859-1", NULL, NULL, NULL);
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if (utf8_val) {
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char *ret_val = wmem_strdup(NULL, utf8_val);
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g_free(utf8_val);
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return ret_val;
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}
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}
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return wmem_strdup(NULL, val);
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}
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char *
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geoip_db_lookup_ipv4(guint dbnum, guint32 addr, const char *not_found) {
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GeoIP *gi;
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GeoIPRecord *gir;
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char *name;
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const char *country;
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char *val, *ret = NULL;
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if (dbnum > geoip_db_num_dbs()) {
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if (not_found == NULL)
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return NULL;
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return wmem_strdup(NULL, not_found);
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}
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gi = g_array_index(geoip_dat_arr, GeoIP *, dbnum);
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if (gi) {
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switch (gi->databaseType) {
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case GEOIP_COUNTRY_EDITION:
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country = GeoIP_country_name_by_ipnum(gi, addr);
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if (country) {
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ret = db_val_to_utf_8(country, gi);
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}
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break;
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case GEOIP_CITY_EDITION_REV0:
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case GEOIP_CITY_EDITION_REV1:
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gir = GeoIP_record_by_ipnum(gi, addr);
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if (gir && gir->city && gir->region) {
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val = wmem_strdup_printf(NULL, "%s, %s", gir->city, gir->region);
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ret = db_val_to_utf_8(val, gi);
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wmem_free(NULL, val);
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} else if (gir && gir->city) {
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ret = db_val_to_utf_8(gir->city, gi);
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}
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if (gir)
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GeoIPRecord_delete(gir);
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break;
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case GEOIP_ORG_EDITION:
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case GEOIP_ISP_EDITION:
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case GEOIP_ASNUM_EDITION:
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name = GeoIP_name_by_ipnum(gi, addr);
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if (name) {
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ret = db_val_to_utf_8(name, gi);
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GeoIP_free(name);
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}
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break;
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case WS_LAT_FAKE_EDITION:
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{
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float lat;
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float lon;
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char *c;
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if(geoip_db_lookup_latlon4(addr, &lat, &lon) == 0) {
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val = wmem_strdup_printf(NULL, "%f", lat);
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c = strchr(val, ',');
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if (c != NULL) *c = '.';
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ret = val;
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}
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}
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break;
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case WS_LON_FAKE_EDITION:
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{
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float lat;
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float lon;
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char *c;
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if(geoip_db_lookup_latlon4(addr, &lat, &lon) == 0) {
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val = wmem_strdup_printf(NULL, "%f", lon);
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c = strchr(val, ',');
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if (c != NULL) *c = '.';
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ret = val;
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}
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}
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break;
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default:
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break;
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}
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}
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if (ret == NULL) {
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if (not_found == NULL)
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return NULL;
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return wmem_strdup(NULL, not_found);
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}
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return ret;
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}
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#ifdef HAVE_GEOIP_V6
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static int
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#if NUM_DB_TYPES > 31 /* 1.4.7 */
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geoip_db_lookup_latlon6(geoipv6_t addr, float *lat, float *lon) {
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GeoIP *gi;
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GeoIPRecord *gir;
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guint i;
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for (i = 0; i < geoip_db_num_dbs(); i++) {
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gi = g_array_index(geoip_dat_arr, GeoIP *, i);
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if (gi) {
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switch (gi->databaseType) {
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case GEOIP_CITY_EDITION_REV0_V6:
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case GEOIP_CITY_EDITION_REV1_V6:
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gir = GeoIP_record_by_ipnum_v6(gi, addr);
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if(gir) {
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*lat = gir->latitude;
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*lon = gir->longitude;
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return 0;
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}
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return -1;
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/*break;*/
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default:
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break;
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}
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}
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}
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return -1;
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}
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#else /* NUM_DB_TYPES */
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geoip_db_lookup_latlon6(geoipv6_t addr _U_, float *lat _U_, float *lon _U_) {
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return -1;
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}
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#endif /* NUM_DB_TYPES */
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char *
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geoip_db_lookup_ipv6(guint dbnum, struct e_in6_addr addr, const char *not_found) {
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GeoIP *gi;
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geoipv6_t gaddr;
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char *name;
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const char *country;
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char *val, *ret = NULL;
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#if NUM_DB_TYPES > 31
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GeoIPRecord *gir;
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#endif
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if (dbnum > geoip_db_num_dbs()) {
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if (not_found == NULL)
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return NULL;
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return wmem_strdup(NULL, not_found);
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}
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memcpy(&gaddr, &addr, sizeof(addr));
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gi = g_array_index(geoip_dat_arr, GeoIP *, dbnum);
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if (gi) {
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switch (gi->databaseType) {
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case GEOIP_COUNTRY_EDITION_V6:
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|
country = GeoIP_country_name_by_ipnum_v6(gi, gaddr);
|
|
if (country) {
|
|
ret = db_val_to_utf_8(country, gi);
|
|
}
|
|
break;
|
|
|
|
#if NUM_DB_TYPES > 31
|
|
case GEOIP_CITY_EDITION_REV0_V6:
|
|
case GEOIP_CITY_EDITION_REV1_V6:
|
|
gir = GeoIP_record_by_ipnum_v6(gi, gaddr);
|
|
if (gir && gir->city && gir->region) {
|
|
val = wmem_strdup_printf(NULL, "%s, %s", gir->city, gir->region);
|
|
ret = db_val_to_utf_8(val, gi);
|
|
wmem_free(NULL, val);
|
|
} else if (gir && gir->city) {
|
|
ret = db_val_to_utf_8(gir->city, gi);
|
|
}
|
|
break;
|
|
|
|
case GEOIP_ORG_EDITION_V6:
|
|
case GEOIP_ISP_EDITION_V6:
|
|
case GEOIP_ASNUM_EDITION_V6:
|
|
name = GeoIP_name_by_ipnum_v6(gi, gaddr);
|
|
if (name) {
|
|
ret = db_val_to_utf_8(name, gi);
|
|
GeoIP_free(name);
|
|
}
|
|
break;
|
|
#endif /* NUM_DB_TYPES */
|
|
|
|
case WS_LAT_FAKE_EDITION:
|
|
{
|
|
float lat;
|
|
float lon;
|
|
char *c;
|
|
if(geoip_db_lookup_latlon6(gaddr, &lat, &lon) == 0) {
|
|
val = wmem_strdup_printf(NULL, "%f", lat);
|
|
c = strchr(val, ',');
|
|
if (c != NULL) *c = '.';
|
|
ret = val;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case WS_LON_FAKE_EDITION:
|
|
{
|
|
float lat;
|
|
float lon;
|
|
char *c;
|
|
if(geoip_db_lookup_latlon6(gaddr, &lat, &lon) == 0) {
|
|
val = wmem_strdup_printf(NULL, "%f", lon);
|
|
c = strchr(val, ',');
|
|
if (c != NULL) *c = '.';
|
|
ret = val;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (ret == NULL) {
|
|
if (not_found == NULL)
|
|
return NULL;
|
|
|
|
return wmem_strdup(NULL, not_found);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#else /* HAVE_GEOIP_V6 */
|
|
|
|
char *
|
|
geoip_db_lookup_ipv6(guint dbnum _U_, struct e_in6_addr addr _U_, const char *not_found) {
|
|
if (not_found == NULL)
|
|
return NULL;
|
|
|
|
return wmem_strdup(NULL, not_found);
|
|
}
|
|
|
|
#endif /* HAVE_GEOIP_V6 */
|
|
|
|
gchar *
|
|
geoip_db_get_paths(void) {
|
|
GString* path_str = NULL;
|
|
guint i;
|
|
|
|
path_str = g_string_new("");
|
|
|
|
for (i = 0; geoip_db_system_paths[i].path != NULL; i++) {
|
|
g_string_append_printf(path_str,
|
|
"%s" G_SEARCHPATH_SEPARATOR_S, geoip_db_system_paths[i].path);
|
|
}
|
|
|
|
for (i = 0; i < num_geoip_db_paths; i++) {
|
|
if (geoip_db_paths[i].path) {
|
|
g_string_append_printf(path_str,
|
|
"%s" G_SEARCHPATH_SEPARATOR_S, geoip_db_paths[i].path);
|
|
}
|
|
}
|
|
|
|
g_string_truncate(path_str, path_str->len-1);
|
|
|
|
return g_string_free(path_str, FALSE);
|
|
}
|
|
|
|
#else /* HAVE_GEOIP */
|
|
guint
|
|
geoip_db_num_dbs(void) {
|
|
return 0;
|
|
}
|
|
|
|
const gchar *
|
|
geoip_db_name(guint dbnum _U_) {
|
|
return "Unsupported";
|
|
}
|
|
|
|
int
|
|
geoip_db_type(guint dbnum _U_) {
|
|
return -1;
|
|
}
|
|
|
|
char *
|
|
geoip_db_lookup_ipv4(guint dbnum _U_, guint32 addr _U_, const char *not_found) {
|
|
if (not_found == NULL)
|
|
return NULL;
|
|
|
|
return (char *)wmem_strdup(NULL, not_found);
|
|
}
|
|
|
|
char *
|
|
geoip_db_lookup_ipv6(guint dbnum _U_, guint32 addr _U_, const char *not_found) {
|
|
if (not_found == NULL)
|
|
return NULL;
|
|
|
|
return (char *)wmem_strdup(NULL, not_found);
|
|
}
|
|
|
|
gchar *
|
|
geoip_db_get_paths(void) {
|
|
return g_strdup("");
|
|
}
|
|
|
|
#endif /* HAVE_GEOIP */
|
|
|
|
/*
|
|
* Editor modelines
|
|
*
|
|
* Local Variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* ex: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|