1 /*  Copyright (C) 2019 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
2 
3     This program is free software: you can redistribute it and/or modify
4     it under the terms of the GNU General Public License as published by
5     the Free Software Foundation, either version 3 of the License, or
6     (at your option) any later version.
7 
8     This program is distributed in the hope that it will be useful,
9     but WITHOUT ANY WARRANTY; without even the implied warranty of
10     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11     GNU General Public License for more details.
12 
13     You should have received a copy of the GNU General Public License
14     along with this program.  If not, see <https://www.gnu.org/licenses/>.
15  */
16 
17 #pragma once
18 
19 #include <libknot/libknot.h>
20 #if HAVE_MAXMINDDB
21 #include <maxminddb.h>
22 #endif
23 
24 #if HAVE_MAXMINDDB
25 #define geodb_t		MMDB_s
26 #define geodb_data_t	MMDB_entry_data_s
27 #else
28 #define geodb_t		void
29 #define geodb_data_t	char
30 #endif
31 
32 // MaxMind DB related constants.
33 #define GEODB_MAX_PATH_LEN 8
34 #define GEODB_MAX_DEPTH 8
35 
36 typedef enum {
37 	GEODB_KEY_ID,
38 	GEODB_KEY_TXT
39 } geodb_key_type_t;
40 
41 static const knot_lookup_t geodb_key_types[] = {
42 	{ GEODB_KEY_ID, "id" },
43 	{ GEODB_KEY_TXT, "" }
44 };
45 
46 typedef struct {
47 	geodb_key_type_t type;
48 	char *path[GEODB_MAX_PATH_LEN + 1]; // MMDB_aget_value() requires last member to be NULL.
49 } geodb_path_t;
50 
51 int parse_geodb_path(geodb_path_t *path, const char *input);
52 
53 int parse_geodb_data(const char *input, void **geodata, uint32_t *geodata_len,
54                      uint8_t *geodepth, geodb_path_t *path, uint16_t path_cnt);
55 
56 bool geodb_available(void);
57 
58 geodb_t *geodb_open(const char *filename);
59 
60 void geodb_close(geodb_t *geodb);
61 
62 int geodb_query(geodb_t *geodb, geodb_data_t *entries, struct sockaddr *remote,
63                 geodb_path_t *paths, uint16_t path_cnt, uint16_t *netmask);
64 
65 void geodb_fill_geodata(geodb_data_t *entries, uint16_t path_cnt,
66                         void **geodata, uint32_t *geodata_len, uint8_t *geodepth);
67