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/*
* DHT bootstrap
*
* A simple DHT boostrap node for tox.
*/
/*
* Copyright © 2016-2017 The TokTok team.
* Copyright © 2013 Tox project.
*
* This file is part of Tox, the free peer to peer instant messenger.
*
* Tox is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Tox 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 Tox. If not, see <http://www.gnu.org/licenses/>.
*/
#define _XOPEN_SOURCE 600
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "../toxcore/DHT.h"
#include "../toxcore/LAN_discovery.h"
#include "../toxcore/friend_requests.h"
#include "../toxcore/logger.h"
#include "../toxcore/tox.h"
#include "../toxcore/util.h"
#define TCP_RELAY_ENABLED
#ifdef TCP_RELAY_ENABLED
#include "../toxcore/TCP_server.h"
#endif
#include "../testing/misc_tools.c"
#ifdef DHT_NODE_EXTRA_PACKETS
#include "./bootstrap_node_packets.h"
#define DHT_VERSION_NUMBER 1
#define DHT_MOTD "This is a test motd"
#endif
#define PORT 33445
static void manage_keys(DHT *dht)
{
enum { KEYS_SIZE = CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_SECRET_KEY_SIZE };
uint8_t keys[KEYS_SIZE];
FILE *keys_file = fopen("key", "r");
if (keys_file != nullptr) {
/* If file was opened successfully -- load keys,
otherwise save new keys */
size_t read_size = fread(keys, sizeof(uint8_t), KEYS_SIZE, keys_file);
if (read_size != KEYS_SIZE) {
printf("Error while reading the key file\nExiting.\n");
exit(1);
}
dht_set_self_public_key(dht, keys);
dht_set_self_secret_key(dht, keys + CRYPTO_PUBLIC_KEY_SIZE);
printf("Keys loaded successfully.\n");
} else {
memcpy(keys, dht_get_self_public_key(dht), CRYPTO_PUBLIC_KEY_SIZE);
memcpy(keys + CRYPTO_PUBLIC_KEY_SIZE, dht_get_self_secret_key(dht), CRYPTO_SECRET_KEY_SIZE);
keys_file = fopen("key", "w");
if (keys_file == nullptr) {
printf("Error opening key file in write mode.\nKeys will not be saved.\n");
return;
}
if (fwrite(keys, sizeof(uint8_t), KEYS_SIZE, keys_file) != KEYS_SIZE) {
printf("Error while writing the key file.\nExiting.\n");
exit(1);
}
printf("Keys saved successfully.\n");
}
fclose(keys_file);
}
int main(int argc, char *argv[])
{
if (argc == 2 && !tox_strncasecmp(argv[1], "-h", 3)) {
printf("Usage (connected) : %s [--ipv4|--ipv6] IP PORT KEY\n", argv[0]);
printf("Usage (unconnected): %s [--ipv4|--ipv6]\n", argv[0]);
exit(0);
}
/* let user override default by cmdline */
uint8_t ipv6enabled = TOX_ENABLE_IPV6_DEFAULT; /* x */
int argvoffset = cmdline_parsefor_ipv46(argc, argv, &ipv6enabled);
if (argvoffset < 0) {
exit(1);
}
/* Initialize networking -
Bind to ip 0.0.0.0 / [::] : PORT */
IP ip;
ip_init(&ip, ipv6enabled);
Logger *logger = logger_new();
DHT *dht = new_DHT(logger, new_networking(logger, ip, PORT), true);
Onion *onion = new_onion(dht);
Onion_Announce *onion_a = new_onion_announce(dht);
#ifdef DHT_NODE_EXTRA_PACKETS
bootstrap_set_callbacks(dht_get_net(dht), DHT_VERSION_NUMBER, DHT_MOTD, sizeof(DHT_MOTD));
#endif
if (!(onion && onion_a)) {
printf("Something failed to initialize.\n");
exit(1);
}
perror("Initialization");
manage_keys(dht);
printf("Public key: ");
uint32_t i;
#ifdef TCP_RELAY_ENABLED
#define NUM_PORTS 3
uint16_t ports[NUM_PORTS] = {443, 3389, PORT};
TCP_Server *tcp_s = new_TCP_server(ipv6enabled, NUM_PORTS, ports, dht_get_self_secret_key(dht), onion);
if (tcp_s == nullptr) {
printf("TCP server failed to initialize.\n");
exit(1);
}
#endif
const char *const public_id_filename = "PUBLIC_ID.txt";
FILE *file = fopen(public_id_filename, "w");
if (file == nullptr) {
printf("Could not open file \"%s\" for writing. Exiting...\n", public_id_filename);
exit(1);
}
for (i = 0; i < 32; i++) {
const uint8_t *const self_public_key = dht_get_self_public_key(dht);
printf("%02X", self_public_key[i]);
fprintf(file, "%02X", self_public_key[i]);
}
fclose(file);
printf("\n");
printf("Port: %u\n", net_ntohs(net_port(dht_get_net(dht))));
if (argc > argvoffset + 3) {
printf("Trying to bootstrap into the network...\n");
uint16_t port = net_htons(atoi(argv[argvoffset + 2]));
uint8_t *bootstrap_key = hex_string_to_bin(argv[argvoffset + 3]);
int res = DHT_bootstrap_from_address(dht, argv[argvoffset + 1],
ipv6enabled, port, bootstrap_key);
free(bootstrap_key);
if (!res) {
printf("Failed to convert \"%s\" into an IP address. Exiting...\n", argv[argvoffset + 1]);
exit(1);
}
}
int is_waiting_for_dht_connection = 1;
uint64_t last_LANdiscovery = 0;
lan_discovery_init(dht);
while (1) {
if (is_waiting_for_dht_connection && DHT_isconnected(dht)) {
printf("Connected to other bootstrap node successfully.\n");
is_waiting_for_dht_connection = 0;
}
do_DHT(dht);
if (is_timeout(last_LANdiscovery, is_waiting_for_dht_connection ? 5 : LAN_DISCOVERY_INTERVAL)) {
lan_discovery_send(net_htons(PORT), dht);
last_LANdiscovery = unix_time();
}
#ifdef TCP_RELAY_ENABLED
do_TCP_server(tcp_s);
#endif
networking_poll(dht_get_net(dht), nullptr);
c_sleep(1);
}
}
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