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/*
* Copyright (c) 2017 Balabit
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "plugin.h"
#include "plugin-types.h"
#include "template/simple-function.h"
#include "messages.h"
#include "cfg.h"
#include "syslog-ng-config.h"
#include "maxminddb-helper.h"
#include "geoip-parser.h"
typedef struct
{
TFSimpleFuncState super;
MMDB_s *database;
gchar *database_path;
gchar **entry_path;
} TFMaxMindDBState;
static inline gboolean
tf_maxminddb_init(TFMaxMindDBState *state)
{
state->database = g_new0(MMDB_s, 1);
if (!mmdb_open_database(state->database_path, state->database))
return FALSE;
return TRUE;
}
static gboolean
tf_geoip_maxminddb_prepare(LogTemplateFunction *self, gpointer s, LogTemplate *parent,
gint argc, gchar *argv[], GError **error)
{
TFMaxMindDBState *state = (TFMaxMindDBState *) s;
gchar *field = NULL;
state->database_path = NULL;
GOptionEntry maxminddb_options[] =
{
{ "database", 'd', 0, G_OPTION_ARG_FILENAME, &state->database_path, "mmdb database location", NULL },
{ "field", 'f', 0, G_OPTION_ARG_STRING, &field, "data path in database. For example: country.iso_code", NULL },
{ NULL }
};
GOptionContext *ctx = g_option_context_new("geoip2");
g_option_context_add_main_entries(ctx, maxminddb_options, NULL);
if (!g_option_context_parse(ctx, &argc, &argv, error))
{
g_option_context_free(ctx);
return FALSE;
}
g_option_context_free(ctx);
if (!state->database_path || argc != 2)
{
g_set_error(error, LOG_TEMPLATE_ERROR, LOG_TEMPLATE_ERROR_COMPILE,
"geoip2: format must be: $(geoip2 --database <db.mmdb> [ --field path.child ] ${HOST})\n");
goto error;
}
if (field)
state->entry_path = g_strsplit(field, ".", -1);
else
state->entry_path = g_strsplit("country.iso_code", ".", -1);
if (!tf_simple_func_prepare(self, state, parent, argc, argv, error))
{
g_set_error(error, LOG_TEMPLATE_ERROR, LOG_TEMPLATE_ERROR_COMPILE,
"geoip2: prepare failed");
goto error;
}
if (!tf_maxminddb_init(state))
{
g_set_error(error, LOG_TEMPLATE_ERROR, LOG_TEMPLATE_ERROR_COMPILE,
"geoip2: could not init database");
goto error;
}
return TRUE;
error:
g_free(state->database_path);
g_strfreev(state->entry_path);
g_free(field);
return FALSE;
}
static void
tf_geoip_maxminddb_call(LogTemplateFunction *self, gpointer s, const LogTemplateInvokeArgs *args, GString *result)
{
TFMaxMindDBState *state = (TFMaxMindDBState *) s;
int _gai_error, mmdb_error;
MMDB_lookup_result_s mmdb_result =
MMDB_lookup_string(state->database, args->argv[0]->str, &_gai_error, &mmdb_error);
if (!mmdb_result.found_entry)
{
mmdb_problem_to_error(_gai_error, mmdb_error, "tflookup");
return;
}
MMDB_entry_data_s entry_data;
mmdb_error = MMDB_aget_value(&mmdb_result.entry, &entry_data, (const char *const* const)state->entry_path);
if (mmdb_error != MMDB_SUCCESS)
{
mmdb_problem_to_error(0, mmdb_error, "tfget_value");
return;
}
if (entry_data.has_data)
append_mmdb_entry_data_to_gstring(result, &entry_data);
return;
}
static void
tf_geoip_maxminddb_free_state(gpointer s)
{
TFMaxMindDBState *state = (TFMaxMindDBState *) s;
g_free(state->database_path);
g_strfreev(state->entry_path);
tf_simple_func_free_state(&state->super);
}
TEMPLATE_FUNCTION(TFMaxMindDBState, tf_geoip_maxminddb, tf_geoip_maxminddb_prepare,
tf_simple_func_eval, tf_geoip_maxminddb_call, tf_geoip_maxminddb_free_state, NULL);
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