tomato/toxcore/onion_client.h
Green Sky ff3512a77e Squashed 'external/toxcore/c-toxcore/' changes from 55752a2e2ef..f785959eace
f785959eace chore: add to_string functions for netprof enums
a95b7957288 cleanup: Heap allocate network profile objects
a3c80149edd feat: Implement Tox network profiler
ac812871a2e feat: implement the last 2 missing network struct functions and make use of them
29d1043be0b test: friend request test now tests min/max message sizes
93aafd78c1f fix: friend requests with very long messages are no longer dropped
819aa2b2618 feat: Add option to disable DNS lookups in toxcore.
0ac23cee035 fix: windows use of REUSEADDR
7d2811d302d chore(ci): make bazel server shutdown faster
1dc399ba20d chore: Use vcpkg instead of conan in the MSVC build.
14d823165d9 chore: Migrate to conan 2.
bdd17c16787 cleanup: Allocate logger using tox memory allocator.
b396c061515 chore(deps): bump third_party/cmp from `2ac6bca` to `52bfcfa`
2e94da60d09 feat(net): add missing connect to network struct
41fb1839c7b chore: Add check to ensure version numbers agree.
934a8301113 chore: Release 0.2.20
3acef4bf044 fix: Add missing free in dht_get_nodes_response event.

git-subtree-dir: external/toxcore/c-toxcore
git-subtree-split: f785959eacebc59590f756b133b52601c335a1d1
2024-12-04 11:41:10 +01:00

249 lines
8.5 KiB
C

/* SPDX-License-Identifier: GPL-3.0-or-later
* Copyright © 2016-2018 The TokTok team.
* Copyright © 2013 Tox project.
*/
/**
* Implementation of the client part of docs/Prevent_Tracking.txt (The part that
* uses the onion stuff to connect to the friend)
*/
#ifndef C_TOXCORE_TOXCORE_ONION_CLIENT_H
#define C_TOXCORE_TOXCORE_ONION_CLIENT_H
#include <stdbool.h>
#include "DHT.h"
#include "attributes.h"
#include "crypto_core.h"
#include "logger.h"
#include "mem.h"
#include "mono_time.h"
#include "net_crypto.h"
#include "network.h"
#include "onion_announce.h"
#include "ping_array.h"
#define MAX_ONION_CLIENTS 8
#define MAX_ONION_CLIENTS_ANNOUNCE 12 // Number of nodes to announce ourselves to.
#define ONION_NODE_PING_INTERVAL 15
#define ONION_NODE_TIMEOUT ONION_NODE_PING_INTERVAL
/** The interval in seconds at which to tell our friends where we are */
#define ONION_DHTPK_SEND_INTERVAL 30
#define DHT_DHTPK_SEND_INTERVAL 20
#define NUMBER_ONION_PATHS 6
/**
* The timeout the first time the path is added and
* then for all the next consecutive times
*/
#define ONION_PATH_FIRST_TIMEOUT 4
#define ONION_PATH_TIMEOUT 10
#define ONION_PATH_MAX_LIFETIME 1200
#define ONION_PATH_MAX_NO_RESPONSE_USES 4
#define MAX_STORED_PINGED_NODES 9
#define MIN_NODE_PING_TIME 10
#define ONION_NODE_MAX_PINGS 3
#define MAX_PATH_NODES 32
#define GCA_MAX_DATA_LENGTH GCA_PUBLIC_ANNOUNCE_MAX_SIZE
/**
* If no announce response packets are received within this interval tox will
* be considered offline. We give time for a node to be pinged often enough
* that it times out, which leads to the network being thoroughly tested as it
* is replaced.
*/
#define ONION_OFFLINE_TIMEOUT (ONION_NODE_PING_INTERVAL * (ONION_NODE_MAX_PINGS+2))
/** Onion data packet ids. */
#define ONION_DATA_FRIEND_REQ CRYPTO_PACKET_FRIEND_REQ
#define ONION_DATA_DHTPK CRYPTO_PACKET_DHTPK
typedef struct Onion_Client Onion_Client;
non_null()
DHT *onion_get_dht(const Onion_Client *onion_c);
non_null()
Net_Crypto *onion_get_net_crypto(const Onion_Client *onion_c);
/** @brief Add a node to the path_nodes bootstrap array.
*
* If a node with the given public key was already in the bootstrap array, this function has no
* effect and returns successfully. There is currently no way to update the IP/port for a bootstrap
* node, so if it changes, the Onion_Client must be recreated.
*
* @param onion_c The onion client object.
* @param ip_port IP/port for the bootstrap node.
* @param public_key DHT public key for the bootstrap node.
*
* @retval false on failure
* @retval true on success
*/
non_null()
bool onion_add_bs_path_node(Onion_Client *onion_c, const IP_Port *ip_port, const uint8_t *public_key);
/** @brief Put up to max_num nodes in nodes.
*
* return the number of nodes.
*/
non_null()
uint16_t onion_backup_nodes(const Onion_Client *onion_c, Node_format *nodes, uint16_t max_num);
/** @brief Get the friend_num of a friend.
*
* return -1 on failure.
* return friend number on success.
*/
non_null()
int onion_friend_num(const Onion_Client *onion_c, const uint8_t *public_key);
/** @brief Add a friend who we want to connect to.
*
* return -1 on failure.
* return the friend number on success or if the friend was already added.
*/
non_null()
int onion_addfriend(Onion_Client *onion_c, const uint8_t *public_key);
/** @brief Delete a friend.
*
* return -1 on failure.
* return the deleted friend number on success.
*/
non_null()
int onion_delfriend(Onion_Client *onion_c, int friend_num);
/** @brief Set if friend is online or not.
*
* NOTE: This function is there and should be used so that we don't send
* useless packets to the friend if they are online.
*
* return -1 on failure.
* return 0 on success.
*/
non_null()
int onion_set_friend_online(Onion_Client *onion_c, int friend_num, bool is_online);
/** @brief Get the ip of friend friendnum and put it in ip_port
*
* @retval -1 if public_key does NOT refer to a friend
* @retval 0 if public_key refers to a friend and we failed to find the friend (yet)
* @retval 1 if public_key refers to a friend and we found them
*/
non_null()
int onion_getfriendip(const Onion_Client *onion_c, int friend_num, IP_Port *ip_port);
typedef int recv_tcp_relay_cb(void *object, uint32_t number, const IP_Port *ip_port, const uint8_t *public_key);
/** @brief Set the function for this friend that will be callbacked with object and number
* when that friend gives us one of the TCP relays they are connected to.
*
* object and number will be passed as argument to this function.
*
* return -1 on failure.
* return 0 on success.
*/
non_null()
int recv_tcp_relay_handler(Onion_Client *onion_c, int friend_num,
recv_tcp_relay_cb *callback, void *object, uint32_t number);
typedef void onion_dht_pk_cb(void *object, int32_t number, const uint8_t *dht_public_key, void *userdata);
/** @brief Set the function for this friend that will be callbacked with object and number
* when that friend gives us their DHT temporary public key.
*
* object and number will be passed as argument to this function.
*
* return -1 on failure.
* return 0 on success.
*/
non_null()
int onion_dht_pk_callback(Onion_Client *onion_c, int friend_num, onion_dht_pk_cb *function, void *object,
uint32_t number);
/** @brief Set a friend's DHT public key.
*
* return -1 on failure.
* return 0 on success.
*/
non_null()
int onion_set_friend_dht_pubkey(Onion_Client *onion_c, int friend_num, const uint8_t *dht_key);
/** @brief Copy friends DHT public key into dht_key.
*
* return 0 on failure (no key copied).
* return 1 on success (key copied).
*/
non_null()
unsigned int onion_getfriend_dht_pubkey(const Onion_Client *onion_c, int friend_num, uint8_t *dht_key);
#define ONION_DATA_IN_RESPONSE_MIN_SIZE (CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_MAC_SIZE)
// TODO(Jfreegman): This is not the correct value; data this large will be dropped by the onion client.
#define ONION_CLIENT_MAX_DATA_SIZE (MAX_DATA_REQUEST_SIZE - ONION_DATA_IN_RESPONSE_MIN_SIZE)
/** @brief Send data of length length to friendnum.
* Maximum length of data is ONION_CLIENT_MAX_DATA_SIZE.
* This data will be received by the friend using the Onion_Data_Handlers callbacks.
*
* Even if this function succeeds, the friend might not receive any data.
*
* return the number of packets sent on success
* return -1 on failure.
*/
non_null()
int send_onion_data(Onion_Client *onion_c, int friend_num, const uint8_t *data, uint16_t length);
typedef int oniondata_handler_cb(void *object, const uint8_t *source_pubkey, const uint8_t *data,
uint16_t length, void *userdata);
/** Function to call when onion data packet with contents beginning with byte is received. */
non_null(1) nullable(3, 4)
void oniondata_registerhandler(Onion_Client *onion_c, uint8_t byte, oniondata_handler_cb *cb, void *object);
typedef bool onion_group_announce_cb(Onion_Client *onion_c, uint32_t sendback_num, const uint8_t *data,
size_t data_length, void *user_data);
/** Function to call when the onion gets a group announce response. */
non_null(1) nullable(2, 3)
void onion_group_announce_register(Onion_Client *onion_c, onion_group_announce_cb *func, void *user_data);
non_null()
void do_onion_client(Onion_Client *onion_c);
non_null()
Onion_Client *new_onion_client(const Logger *logger, const Memory *mem, const Random *rng, const Mono_Time *mono_time, Net_Crypto *c);
nullable(1)
void kill_onion_client(Onion_Client *onion_c);
typedef enum Onion_Connection_Status {
/** We are not connected to the network. */
ONION_CONNECTION_STATUS_NONE = 0,
/** We are connected with TCP only. */
ONION_CONNECTION_STATUS_TCP = 1,
/** We are also connected with UDP. */
ONION_CONNECTION_STATUS_UDP = 2,
} Onion_Connection_Status;
non_null()
Onion_Connection_Status onion_connection_status(const Onion_Client *onion_c);
typedef struct Onion_Friend Onion_Friend;
non_null() uint16_t onion_get_friend_count(const Onion_Client *onion_c);
non_null() Onion_Friend *onion_get_friend(const Onion_Client *onion_c, uint16_t friend_num);
non_null() const uint8_t *onion_friend_get_gc_public_key(const Onion_Friend *onion_friend);
non_null() const uint8_t *onion_friend_get_gc_public_key_num(const Onion_Client *onion_c, uint32_t num);
non_null() void onion_friend_set_gc_public_key(Onion_Friend *onion_friend, const uint8_t *public_key);
non_null(1) nullable(2)
void onion_friend_set_gc_data(Onion_Friend *onion_friend, const uint8_t *gc_data, uint16_t gc_data_length);
non_null() bool onion_friend_is_groupchat(const Onion_Friend *onion_friend);
#endif /* C_TOXCORE_TOXCORE_ONION_CLIENT_H */