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/* DHT boostrap
*
* A simple DHT boostrap server for tox.
*
* Build commands (use one or the other):
* gcc -O2 -Wall -D VANILLA_NACL -o bootstrap_server ../core/Lossless_UDP.c ../core/network.c ../core/net_crypto.c ../core/Messenger.c ../core/DHT.c ../core/friend_requests.c ../nacl/build/${HOSTNAME%.*}/lib/amd64/{cpucycles.o,libnacl.a,randombytes.o} DHT_bootstrap.c
*
* gcc -O2 -Wall -o bootstrap_server ../core/Lossless_UDP.c ../core/network.c ../core/net_crypto.c ../core/Messenger.c ../core/DHT.c ../core/friend_requests.c -lsodium DHT_bootstrap.c
*
*
* Copyright (C) 2013 Tox project All Rights Reserved.
*
* This file is part of Tox.
*
* 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/>.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "../toxcore/DHT.h"
#include "../toxcore/LAN_discovery.h"
#include "../toxcore/friend_requests.h"
#include "../testing/misc_tools.c"
/* Sleep function (x = milliseconds) */
#ifdef WIN32
#define c_sleep(x) Sleep(1*x)
#else
#include <unistd.h>
#include <arpa/inet.h>
#define c_sleep(x) usleep(1000*x)
#endif
#define PORT 33445
void manage_keys(DHT *dht)
{
const uint32_t KEYS_SIZE = crypto_box_PUBLICKEYBYTES + crypto_box_SECRETKEYBYTES;
uint8_t keys[KEYS_SIZE];
FILE *keys_file = fopen("key", "r");
if (keys_file != NULL) {
/* 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);
}
load_keys(dht->c, keys);
printf("Keys loaded successfully.\n");
} else {
new_keys(dht->c);
save_keys(dht->c, keys);
keys_file = fopen("key", "w");
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 && !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);
DHT *dht = new_DHT(new_net_crypto(new_networking(ip, PORT)));
perror("Initialization");
manage_keys(dht);
printf("Public key: ");
uint32_t i;
FILE *file;
file = fopen("PUBLIC_ID.txt", "w");
for (i = 0; i < 32; i++) {
if (dht->c->self_public_key[i] < 16)
printf("0");
printf("%hhX", dht->c->self_public_key[i]);
fprintf(file, "%hhX", dht->c->self_public_key[i]);
}
fclose(file);
printf("\n");
printf("Port: %u\n", ntohs(dht->c->lossless_udp->net->port));
if (argc > argvoffset + 3) {
printf("Trying to bootstrap into the network...\n");
uint16_t port = 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;
LANdiscovery_init(dht);
while (1) {
if (is_waiting_for_dht_connection && DHT_isconnected(dht)) {
printf("Connected to other bootstrap server successfully.\n");
is_waiting_for_dht_connection = 0;
}
do_DHT(dht);
if (last_LANdiscovery + (is_waiting_for_dht_connection ? 5 : LAN_DISCOVERY_INTERVAL) < unix_time()) {
send_LANdiscovery(htons(PORT), dht->c);
last_LANdiscovery = unix_time();
}
networking_poll(dht->c->lossless_udp->net);
c_sleep(1);
}
return 0;
}
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