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-rw-r--r--libs/libtox/src/toxcore/ping.c381
1 files changed, 0 insertions, 381 deletions
diff --git a/libs/libtox/src/toxcore/ping.c b/libs/libtox/src/toxcore/ping.c
deleted file mode 100644
index 72b3fe6259..0000000000
--- a/libs/libtox/src/toxcore/ping.c
+++ /dev/null
@@ -1,381 +0,0 @@
-/*
- * Buffered pinging using cyclic arrays.
- */
-
-/*
- * Copyright © 2016-2017 The TokTok team.
- * Copyright © 2013 Tox project.
- * Copyright © 2013 plutooo
- *
- * This file is part of Tox, the free peer to peer instant messenger.
- * This file is donated to the Tox Project.
- *
- * 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 "ping.h"
-
-#include "DHT.h"
-#include "network.h"
-#include "ping_array.h"
-#include "util.h"
-
-#include <stdint.h>
-
-#define PING_NUM_MAX 512
-
-/* Maximum newly announced nodes to ping per TIME_TO_PING seconds. */
-#define MAX_TO_PING 32
-
-/* Ping newly announced nodes to ping per TIME_TO_PING seconds*/
-#define TIME_TO_PING 2
-
-
-struct PING {
- DHT *dht;
-
- Ping_Array ping_array;
- Node_format to_ping[MAX_TO_PING];
- uint64_t last_to_ping;
-};
-
-
-#define PING_PLAIN_SIZE (1 + sizeof(uint64_t))
-#define DHT_PING_SIZE (1 + CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_NONCE_SIZE + PING_PLAIN_SIZE + CRYPTO_MAC_SIZE)
-#define PING_DATA_SIZE (CRYPTO_PUBLIC_KEY_SIZE + sizeof(IP_Port))
-
-int send_ping_request(PING *ping, IP_Port ipp, const uint8_t *public_key)
-{
- uint8_t pk[DHT_PING_SIZE];
- int rc;
- uint64_t ping_id;
-
- if (id_equal(public_key, ping->dht->self_public_key)) {
- return 1;
- }
-
- uint8_t shared_key[CRYPTO_SHARED_KEY_SIZE];
-
- // generate key to encrypt ping_id with recipient privkey
- DHT_get_shared_key_sent(ping->dht, shared_key, public_key);
- // Generate random ping_id.
- uint8_t data[PING_DATA_SIZE];
- id_copy(data, public_key);
- memcpy(data + CRYPTO_PUBLIC_KEY_SIZE, &ipp, sizeof(IP_Port));
- ping_id = ping_array_add(&ping->ping_array, data, sizeof(data));
-
- if (ping_id == 0) {
- return 1;
- }
-
- uint8_t ping_plain[PING_PLAIN_SIZE];
- ping_plain[0] = NET_PACKET_PING_REQUEST;
- memcpy(ping_plain + 1, &ping_id, sizeof(ping_id));
-
- pk[0] = NET_PACKET_PING_REQUEST;
- id_copy(pk + 1, ping->dht->self_public_key); // Our pubkey
- random_nonce(pk + 1 + CRYPTO_PUBLIC_KEY_SIZE); // Generate new nonce
-
-
- rc = encrypt_data_symmetric(shared_key,
- pk + 1 + CRYPTO_PUBLIC_KEY_SIZE,
- ping_plain, sizeof(ping_plain),
- pk + 1 + CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_NONCE_SIZE);
-
- if (rc != PING_PLAIN_SIZE + CRYPTO_MAC_SIZE) {
- return 1;
- }
-
- return sendpacket(ping->dht->net, ipp, pk, sizeof(pk));
-}
-
-static int send_ping_response(PING *ping, IP_Port ipp, const uint8_t *public_key, uint64_t ping_id,
- uint8_t *shared_encryption_key)
-{
- uint8_t pk[DHT_PING_SIZE];
- int rc;
-
- if (id_equal(public_key, ping->dht->self_public_key)) {
- return 1;
- }
-
- uint8_t ping_plain[PING_PLAIN_SIZE];
- ping_plain[0] = NET_PACKET_PING_RESPONSE;
- memcpy(ping_plain + 1, &ping_id, sizeof(ping_id));
-
- pk[0] = NET_PACKET_PING_RESPONSE;
- id_copy(pk + 1, ping->dht->self_public_key); // Our pubkey
- random_nonce(pk + 1 + CRYPTO_PUBLIC_KEY_SIZE); // Generate new nonce
-
- // Encrypt ping_id using recipient privkey
- rc = encrypt_data_symmetric(shared_encryption_key,
- pk + 1 + CRYPTO_PUBLIC_KEY_SIZE,
- ping_plain, sizeof(ping_plain),
- pk + 1 + CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_NONCE_SIZE);
-
- if (rc != PING_PLAIN_SIZE + CRYPTO_MAC_SIZE) {
- return 1;
- }
-
- return sendpacket(ping->dht->net, ipp, pk, sizeof(pk));
-}
-
-static int handle_ping_request(void *object, IP_Port source, const uint8_t *packet, uint16_t length, void *userdata)
-{
- DHT *dht = (DHT *)object;
- int rc;
-
- if (length != DHT_PING_SIZE) {
- return 1;
- }
-
- PING *ping = dht->ping;
-
- if (id_equal(packet + 1, ping->dht->self_public_key)) {
- return 1;
- }
-
- uint8_t shared_key[CRYPTO_SHARED_KEY_SIZE];
-
- uint8_t ping_plain[PING_PLAIN_SIZE];
- // Decrypt ping_id
- DHT_get_shared_key_recv(dht, shared_key, packet + 1);
- rc = decrypt_data_symmetric(shared_key,
- packet + 1 + CRYPTO_PUBLIC_KEY_SIZE,
- packet + 1 + CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_NONCE_SIZE,
- PING_PLAIN_SIZE + CRYPTO_MAC_SIZE,
- ping_plain);
-
- if (rc != sizeof(ping_plain)) {
- return 1;
- }
-
- if (ping_plain[0] != NET_PACKET_PING_REQUEST) {
- return 1;
- }
-
- uint64_t ping_id;
- memcpy(&ping_id, ping_plain + 1, sizeof(ping_id));
- // Send response
- send_ping_response(ping, source, packet + 1, ping_id, shared_key);
- add_to_ping(ping, packet + 1, source);
-
- return 0;
-}
-
-static int handle_ping_response(void *object, IP_Port source, const uint8_t *packet, uint16_t length, void *userdata)
-{
- DHT *dht = (DHT *)object;
- int rc;
-
- if (length != DHT_PING_SIZE) {
- return 1;
- }
-
- PING *ping = dht->ping;
-
- if (id_equal(packet + 1, ping->dht->self_public_key)) {
- return 1;
- }
-
- uint8_t shared_key[CRYPTO_SHARED_KEY_SIZE];
-
- // generate key to encrypt ping_id with recipient privkey
- DHT_get_shared_key_sent(ping->dht, shared_key, packet + 1);
-
- uint8_t ping_plain[PING_PLAIN_SIZE];
- // Decrypt ping_id
- rc = decrypt_data_symmetric(shared_key,
- packet + 1 + CRYPTO_PUBLIC_KEY_SIZE,
- packet + 1 + CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_NONCE_SIZE,
- PING_PLAIN_SIZE + CRYPTO_MAC_SIZE,
- ping_plain);
-
- if (rc != sizeof(ping_plain)) {
- return 1;
- }
-
- if (ping_plain[0] != NET_PACKET_PING_RESPONSE) {
- return 1;
- }
-
- uint64_t ping_id;
- memcpy(&ping_id, ping_plain + 1, sizeof(ping_id));
- uint8_t data[PING_DATA_SIZE];
-
- if (ping_array_check(data, sizeof(data), &ping->ping_array, ping_id) != sizeof(data)) {
- return 1;
- }
-
- if (!id_equal(packet + 1, data)) {
- return 1;
- }
-
- IP_Port ipp;
- memcpy(&ipp, data + CRYPTO_PUBLIC_KEY_SIZE, sizeof(IP_Port));
-
- if (!ipport_equal(&ipp, &source)) {
- return 1;
- }
-
- addto_lists(dht, source, packet + 1);
- return 0;
-}
-
-/* Check if public_key with ip_port is in the list.
- *
- * return 1 if it is.
- * return 0 if it isn't.
- */
-static int in_list(const Client_data *list, uint16_t length, const uint8_t *public_key, IP_Port ip_port)
-{
- unsigned int i;
-
- for (i = 0; i < length; ++i) {
- if (id_equal(list[i].public_key, public_key)) {
- const IPPTsPng *ipptp;
-
- if (ip_port.ip.family == TOX_AF_INET) {
- ipptp = &list[i].assoc4;
- } else {
- ipptp = &list[i].assoc6;
- }
-
- if (!is_timeout(ipptp->timestamp, BAD_NODE_TIMEOUT) && ipport_equal(&ipptp->ip_port, &ip_port)) {
- return 1;
- }
- }
- }
-
- return 0;
-}
-
-/* Add nodes to the to_ping list.
- * All nodes in this list are pinged every TIME_TO_PING seconds
- * and are then removed from the list.
- * If the list is full the nodes farthest from our public_key are replaced.
- * The purpose of this list is to enable quick integration of new nodes into the
- * network while preventing amplification attacks.
- *
- * return 0 if node was added.
- * return -1 if node was not added.
- */
-int add_to_ping(PING *ping, const uint8_t *public_key, IP_Port ip_port)
-{
- if (!ip_isset(&ip_port.ip)) {
- return -1;
- }
-
- if (!node_addable_to_close_list(ping->dht, public_key, ip_port)) {
- return -1;
- }
-
- if (in_list(ping->dht->close_clientlist, LCLIENT_LIST, public_key, ip_port)) {
- return -1;
- }
-
- IP_Port temp;
-
- if (DHT_getfriendip(ping->dht, public_key, &temp) == 0) {
- send_ping_request(ping, ip_port, public_key);
- return -1;
- }
-
- unsigned int i;
-
- for (i = 0; i < MAX_TO_PING; ++i) {
- if (!ip_isset(&ping->to_ping[i].ip_port.ip)) {
- memcpy(ping->to_ping[i].public_key, public_key, CRYPTO_PUBLIC_KEY_SIZE);
- ipport_copy(&ping->to_ping[i].ip_port, &ip_port);
- return 0;
- }
-
- if (public_key_cmp(ping->to_ping[i].public_key, public_key) == 0) {
- return -1;
- }
- }
-
- if (add_to_list(ping->to_ping, MAX_TO_PING, public_key, ip_port, ping->dht->self_public_key)) {
- return 0;
- }
-
- return -1;
-}
-
-
-/* Ping all the valid nodes in the to_ping list every TIME_TO_PING seconds.
- * This function must be run at least once every TIME_TO_PING seconds.
- */
-void do_to_ping(PING *ping)
-{
- if (!is_timeout(ping->last_to_ping, TIME_TO_PING)) {
- return;
- }
-
- if (!ip_isset(&ping->to_ping[0].ip_port.ip)) {
- return;
- }
-
- unsigned int i;
-
- for (i = 0; i < MAX_TO_PING; ++i) {
- if (!ip_isset(&ping->to_ping[i].ip_port.ip)) {
- break;
- }
-
- if (!node_addable_to_close_list(ping->dht, ping->to_ping[i].public_key, ping->to_ping[i].ip_port)) {
- continue;
- }
-
- send_ping_request(ping, ping->to_ping[i].ip_port, ping->to_ping[i].public_key);
- ip_reset(&ping->to_ping[i].ip_port.ip);
- }
-
- if (i != 0) {
- ping->last_to_ping = unix_time();
- }
-}
-
-
-PING *new_ping(DHT *dht)
-{
- PING *ping = (PING *)calloc(1, sizeof(PING));
-
- if (ping == NULL) {
- return NULL;
- }
-
- if (ping_array_init(&ping->ping_array, PING_NUM_MAX, PING_TIMEOUT) != 0) {
- free(ping);
- return NULL;
- }
-
- ping->dht = dht;
- networking_registerhandler(ping->dht->net, NET_PACKET_PING_REQUEST, &handle_ping_request, dht);
- networking_registerhandler(ping->dht->net, NET_PACKET_PING_RESPONSE, &handle_ping_response, dht);
-
- return ping;
-}
-
-void kill_ping(PING *ping)
-{
- networking_registerhandler(ping->dht->net, NET_PACKET_PING_REQUEST, NULL, NULL);
- networking_registerhandler(ping->dht->net, NET_PACKET_PING_RESPONSE, NULL, NULL);
- ping_array_free_all(&ping->ping_array);
-
- free(ping);
-}
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